Added support for otf into the build scripts. Updated prebuild maps.

Applied code from jbr-dev
bundle Inter font
2025-12-06 17:39:40 +01:00 · 2021-09-03 21:05:33 +02:00 · 2021-09-02 23:25:58 +02:00 · 2021-09-02 07:08:38 +03:00 · 2021-09-02 07:08:37 +03:00 · 2021-09-02 07:08:36 +03:00
18318 changed files with 999288 additions and 802104 deletions
--- a/.github/workflows/submit.yml
+++ b/.github/workflows/submit.yml
@@ -4,6 +4,7 @@ on:
  push:
    branches-ignore:
      - master
+      - pr/*
  workflow_dispatch:
    inputs:
      platforms:
@@ -24,6 +25,7 @@ jobs:
      platform_windows_aarch64: ${{ steps.check_platforms.outputs.platform_windows_aarch64 }}
      platform_windows_x64: ${{ steps.check_platforms.outputs.platform_windows_x64 }}
      platform_macos_x64: ${{ steps.check_platforms.outputs.platform_macos_x64 }}
+      platform_macos_aarch64: ${{ steps.check_platforms.outputs.platform_macos_aarch64 }}
      dependencies: ${{ steps.check_deps.outputs.dependencies }}

    steps:
@@ -40,6 +42,7 @@ jobs:
          echo "::set-output name=platform_windows_aarch64::${{ contains(github.event.inputs.platforms, 'windows aarch64') || (github.event.inputs.platforms == '' && (secrets.JDK_SUBMIT_PLATFORMS == '' || contains(secrets.JDK_SUBMIT_PLATFORMS, 'windows aarch64'))) }}"
          echo "::set-output name=platform_windows_x64::${{ contains(github.event.inputs.platforms, 'windows x64') || (github.event.inputs.platforms == '' && (secrets.JDK_SUBMIT_PLATFORMS == '' || contains(secrets.JDK_SUBMIT_PLATFORMS, 'windows x64'))) }}"
          echo "::set-output name=platform_macos_x64::${{ contains(github.event.inputs.platforms, 'macos x64') || (github.event.inputs.platforms == '' && (secrets.JDK_SUBMIT_PLATFORMS == '' || contains(secrets.JDK_SUBMIT_PLATFORMS, 'macos x64'))) }}"
+          echo "::set-output name=platform_macos_aarch64::${{ contains(github.event.inputs.platforms, 'macos aarch64') || (github.event.inputs.platforms == '' && (secrets.JDK_SUBMIT_PLATFORMS == '' || contains(secrets.JDK_SUBMIT_PLATFORMS, 'macos aarch64'))) }}"
        if: steps.check_submit.outputs.should_run != 'false'

      - name: Determine unique bundle identifier
@@ -55,7 +58,7 @@ jobs:

      - name: Determine versions and locations to be used for dependencies
        id: check_deps
-        run: "echo ::set-output name=dependencies::`cat make/autoconf/version-numbers make/conf/test-dependencies | sed -e '1i {' -e 's/#.*//g' -e 's/\"//g' -e 's/\\(.*\\)=\\(.*\\)/\"\\1\": \"\\2\",/g' -e '$s/,\\s\\{0,\\}$/\\}/'`"
+        run: "echo ::set-output name=dependencies::`cat make/conf/version-numbers.conf make/conf/test-dependencies | sed -e '1i {' -e 's/#.*//g' -e 's/\"//g' -e 's/\\(.*\\)=\\(.*\\)/\"\\1\": \"\\2\",/g' -e '$s/,\\s\\{0,\\}$/\\}/'`"
        working-directory: jdk
        if: steps.check_submit.outputs.should_run != 'false'

@@ -64,7 +67,7 @@ jobs:
        if: steps.check_submit.outputs.should_run != 'false'

      - name: Determine the jtreg ref to checkout
-        run: "echo JTREG_REF=jtreg${{ fromJson(steps.check_deps.outputs.dependencies).JTREG_VERSION }}-${{ fromJson(steps.check_deps.outputs.dependencies).JTREG_BUILD }} >> $GITHUB_ENV"
+        run: "echo JTREG_REF=jtreg-${{ fromJson(steps.check_deps.outputs.dependencies).JTREG_VERSION }}+${{ fromJson(steps.check_deps.outputs.dependencies).JTREG_BUILD }} >> $GITHUB_ENV"
        if: steps.check_submit.outputs.should_run != 'false'

      - name: Check if a jtreg image is present in the cache
@@ -84,7 +87,7 @@ jobs:
        if: steps.check_submit.outputs.should_run != 'false' && steps.jtreg.outputs.cache-hit != 'true'

      - name: Build jtreg
-        run: sh make/build-all.sh ${JAVA_HOME_8_X64}
+        run: bash make/build.sh --jdk ${JAVA_HOME_8_X64}
        working-directory: jtreg
        if: steps.check_submit.outputs.should_run != 'false' && steps.jtreg.outputs.cache-hit != 'true'

@@ -171,7 +174,7 @@ jobs:
      - name: Install dependencies
        run: |
          sudo apt-get update
-          sudo apt-get install gcc-10=10.2.0-5ubuntu1~20.04 g++-10=10.2.0-5ubuntu1~20.04 libxrandr-dev libxtst-dev libcups2-dev libasound2-dev
+          sudo apt-get install gcc-10=10.3.0-1ubuntu1~20.04 g++-10=10.3.0-1ubuntu1~20.04 libxrandr-dev libxtst-dev libcups2-dev libasound2-dev
          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10

      - name: Configure
@@ -486,12 +489,12 @@ jobs:

      - name: Install native host dependencies
        run: |
-          sudo apt-get install gcc-10=10.2.0-5ubuntu1~20.04 g++-10=10.2.0-5ubuntu1~20.04 libxrandr-dev libxtst-dev libcups2-dev libasound2-dev
+          sudo apt-get install gcc-10=10.3.0-1ubuntu1~20.04 g++-10=10.3.0-1ubuntu1~20.04 libxrandr-dev libxtst-dev libcups2-dev libasound2-dev
          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10
        if: matrix.debian-arch == ''

      - name: Install cross-compilation host dependencies
-        run: sudo apt-get install gcc-10-${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-flavor}}=10.2.0-5ubuntu1~20.04cross1 g++-10-${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-flavor}}=10.2.0-5ubuntu1~20.04cross1
+        run: sudo apt-get install gcc-10-${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-flavor}}=10.3.0-1ubuntu1~20.04cross1 g++-10-${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-flavor}}=10.3.0-1ubuntu1~20.04cross1
        if: matrix.debian-arch != ''

      - name: Cache sysroot
@@ -536,10 +539,6 @@ jobs:
          echo "cross_flags=
          --openjdk-target=${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-flavor}}
          --with-sysroot=${HOME}/sysroot-${{ matrix.debian-arch }}/
-          --with-toolchain-path=${HOME}/sysroot-${{ matrix.debian-arch }}/
-          --with-freetype-lib=${HOME}/sysroot-${{ matrix.debian-arch }}/usr/lib/${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-flavor}}/
-          --with-freetype-include=${HOME}/sysroot-${{ matrix.debian-arch }}/usr/include/freetype2/
-          --x-libraries=${HOME}/sysroot-${{ matrix.debian-arch }}/usr/lib/${{ matrix.gnu-arch }}-linux-gnu${{ matrix.gnu-flavor}}/
          " >> $GITHUB_ENV
        if: matrix.debian-arch != ''

@@ -632,11 +631,13 @@ jobs:

      # Roll in the multilib environment and its dependencies.
      # Some multilib libraries do not have proper inter-dependencies, so we have to
-      # install their dependencies manually.
+      # install their dependencies manually. Additionally, upgrading apt solves
+      # the libc6 installation bugs until base image catches up, see JDK-8260460.
      - name: Install dependencies
        run: |
          sudo dpkg --add-architecture i386
          sudo apt-get update
+          sudo apt-get install --only-upgrade apt
          sudo apt-get install gcc-10-multilib g++-10-multilib libfreetype6-dev:i386 libxrandr-dev:i386 libxtst-dev:i386 libtiff-dev:i386 libcupsimage2-dev:i386 libcups2-dev:i386 libasound2-dev:i386
          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10

@@ -911,7 +912,7 @@ jobs:
        run: >
          Start-Process -FilePath 'C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe' -Wait -NoNewWindow -ArgumentList
          'modify --installPath "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise" --quiet
-          --add Microsoft.VisualStudio.Component.VC.14.28.arm64'
+          --add Microsoft.VisualStudio.Component.VC.14.29.arm64'

      - name: Configure
        run: >
@@ -920,7 +921,7 @@ jobs:
          $env:BOOT_JDK = cygpath "$HOME/bootjdk/$env:BOOT_JDK_VERSION" ;
          & bash configure
          --with-conf-name=windows-aarch64
-          --with-msvc-toolset-version=14.28
+          --with-msvc-toolset-version=14.29
          --openjdk-target=aarch64-unknown-cygwin
          ${{ matrix.flags }}
          --with-version-opt="$env:GITHUB_ACTOR-$env:GITHUB_SHA"
@@ -1022,7 +1023,7 @@ jobs:
        run: >
          Start-Process -FilePath 'C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installer.exe' -Wait -NoNewWindow -ArgumentList
          'modify --installPath "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise" --quiet
-          --add Microsoft.VisualStudio.Component.VC.14.27.x86.x64'
+          --add Microsoft.VisualStudio.Component.VC.14.28.x86.x64'

      - name: Configure
        run: >
@@ -1033,7 +1034,7 @@ jobs:
          $env:GTEST = cygpath "$env:GITHUB_WORKSPACE/gtest" ;
          & bash configure
          --with-conf-name=windows-x64
-          --with-msvc-toolset-version=14.27
+          --with-msvc-toolset-version=14.28
          ${{ matrix.flags }}
          --with-version-opt="$env:GITHUB_ACTOR-$env:GITHUB_SHA"
          --with-version-build=0
@@ -1360,8 +1361,112 @@ jobs:
        with:
          name: transient_jdk-macos-x64${{ matrix.artifact }}_${{ needs.prerequisites.outputs.bundle_id }}
          path: |
-            jdk/build/macos-x64/bundles/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin${{ matrix.artifact }}.tar.gz
-            jdk/build/macos-x64/bundles/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin-tests${{ matrix.artifact }}.tar.gz
+            jdk/build/macos-x64/bundles/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin${{ matrix.artifact }}.tar.gz
+            jdk/build/macos-x64/bundles/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin-tests${{ matrix.artifact }}.tar.gz
+
+  macos_aarch64_build:
+    name: macOS aarch64
+    runs-on: "macos-10.15"
+    needs: prerequisites
+    if: needs.prerequisites.outputs.should_run != 'false' && needs.prerequisites.outputs.platform_macos_aarch64 != 'false'
+
+    strategy:
+      fail-fast: false
+      matrix:
+        flavor:
+          - build release
+          - build debug
+        include:
+          - flavor: build release
+          - flavor: build debug
+            flags: --enable-debug
+            artifact: -debug
+
+    env:
+      JDK_VERSION: "${{ fromJson(needs.prerequisites.outputs.dependencies).DEFAULT_VERSION_FEATURE }}"
+      BOOT_JDK_VERSION: "${{ fromJson(needs.prerequisites.outputs.dependencies).BOOT_JDK_VERSION }}"
+      BOOT_JDK_FILENAME: "${{ fromJson(needs.prerequisites.outputs.dependencies).MACOS_X64_BOOT_JDK_FILENAME }}"
+      BOOT_JDK_URL: "${{ fromJson(needs.prerequisites.outputs.dependencies).MACOS_X64_BOOT_JDK_URL }}"
+      BOOT_JDK_SHA256: "${{ fromJson(needs.prerequisites.outputs.dependencies).MACOS_X64_BOOT_JDK_SHA256 }}"
+
+    steps:
+      - name: Checkout the source
+        uses: actions/checkout@v2
+        with:
+          path: jdk
+
+      - name: Restore boot JDK from cache
+        id: bootjdk
+        uses: actions/cache@v2
+        with:
+          path: ~/bootjdk/${{ env.BOOT_JDK_VERSION }}
+          key: bootjdk-${{ runner.os }}-${{ env.BOOT_JDK_VERSION }}-${{ env.BOOT_JDK_SHA256 }}-v1
+
+      - name: Download boot JDK
+        run: |
+          mkdir -p ${HOME}/bootjdk/${BOOT_JDK_VERSION} || true
+          wget -O "${HOME}/bootjdk/${BOOT_JDK_FILENAME}" "${BOOT_JDK_URL}"
+          echo "${BOOT_JDK_SHA256}  ${HOME}/bootjdk/${BOOT_JDK_FILENAME}" | shasum -a 256 -c >/dev/null -
+          tar -xf "${HOME}/bootjdk/${BOOT_JDK_FILENAME}" -C "${HOME}/bootjdk/${BOOT_JDK_VERSION}"
+          mv "${HOME}/bootjdk/${BOOT_JDK_VERSION}/"*/* "${HOME}/bootjdk/${BOOT_JDK_VERSION}/"
+        if: steps.bootjdk.outputs.cache-hit != 'true'
+
+      - name: Restore jtreg artifact
+        id: jtreg_restore
+        uses: actions/download-artifact@v2
+        with:
+          name: transient_jtreg_${{ needs.prerequisites.outputs.bundle_id }}
+          path: ~/jtreg/
+        continue-on-error: true
+
+      - name: Restore jtreg artifact (retry)
+        uses: actions/download-artifact@v2
+        with:
+          name: transient_jtreg_${{ needs.prerequisites.outputs.bundle_id }}
+          path: ~/jtreg/
+        if: steps.jtreg_restore.outcome == 'failure'
+
+      - name: Checkout gtest sources
+        uses: actions/checkout@v2
+        with:
+          repository: "google/googletest"
+          ref: "release-${{ fromJson(needs.prerequisites.outputs.dependencies).GTEST_VERSION }}"
+          path: gtest
+
+      - name: Install dependencies
+        run: brew install make
+
+      - name: Select Xcode version
+        run: sudo xcode-select --switch /Applications/Xcode_12.4.app/Contents/Developer
+
+      - name: Configure
+        run: >
+          bash configure
+          --with-conf-name=macos-aarch64
+          --openjdk-target=aarch64-apple-darwin
+          ${{ matrix.flags }}
+          --with-version-opt=${GITHUB_ACTOR}-${GITHUB_SHA}
+          --with-version-build=0
+          --with-boot-jdk=${HOME}/bootjdk/${BOOT_JDK_VERSION}/Contents/Home
+          --with-jtreg=${HOME}/jtreg
+          --with-gtest=${GITHUB_WORKSPACE}/gtest
+          --with-default-make-target="product-bundles test-bundles"
+          --with-zlib=system
+          --enable-jtreg-failure-handler
+        working-directory: jdk
+
+      - name: Build
+        run: make CONF_NAME=macos-aarch64
+        working-directory: jdk
+
+      - name: Persist test bundles
+        uses: actions/upload-artifact@v2
+        with:
+          name: transient_jdk-macos-aarch64${{ matrix.artifact }}_${{ needs.prerequisites.outputs.bundle_id }}
+          path: |
+            jdk/build/macos-aarch64/bundles/jdk-${{ env.JDK_VERSION }}-internal+0_macos-aarch64_bin${{ matrix.artifact }}.tar.gz
+            jdk/build/macos-aarch64/bundles/jdk-${{ env.JDK_VERSION }}-internal+0_macos-aarch64_bin-tests${{ matrix.artifact }}.tar.gz
+

  macos_x64_test:
    name: macOS x64
@@ -1467,13 +1572,13 @@ jobs:

      - name: Unpack jdk
        run: |
-          mkdir -p "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin${{ matrix.artifact }}"
-          tar -xf "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin${{ matrix.artifact }}.tar.gz" -C "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin${{ matrix.artifact }}"
+          mkdir -p "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin${{ matrix.artifact }}"
+          tar -xf "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin${{ matrix.artifact }}.tar.gz" -C "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin${{ matrix.artifact }}"

      - name: Unpack tests
        run: |
-          mkdir -p "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin-tests${{ matrix.artifact }}"
-          tar -xf "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin-tests${{ matrix.artifact }}.tar.gz" -C "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin-tests${{ matrix.artifact }}"
+          mkdir -p "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin-tests${{ matrix.artifact }}"
+          tar -xf "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin-tests${{ matrix.artifact }}.tar.gz" -C "${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin-tests${{ matrix.artifact }}"

      - name: Install dependencies
        run: brew install make
@@ -1483,13 +1588,13 @@ jobs:

      - name: Find root of jdk image dir
        run: |
-          imageroot=`find ${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin${{ matrix.artifact }} -name release -type f`
+          imageroot=`find ${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin${{ matrix.artifact }} -name release -type f`
          echo "imageroot=`dirname ${imageroot}`" >> $GITHUB_ENV

      - name: Run tests
        run: >
          JDK_IMAGE_DIR=${{ env.imageroot }}
-          TEST_IMAGE_DIR=${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_osx-x64_bin-tests${{ matrix.artifact }}
+          TEST_IMAGE_DIR=${HOME}/jdk-macos-x64${{ matrix.artifact }}/jdk-${{ env.JDK_VERSION }}-internal+0_macos-x64_bin-tests${{ matrix.artifact }}
          BOOT_JDK=${HOME}/bootjdk/${BOOT_JDK_VERSION}/Contents/Home
          JT_HOME=${HOME}/jtreg
          gmake test-prebuilt
@@ -1561,6 +1666,7 @@ jobs:
      - linux_x86_test
      - windows_x64_test
      - macos_x64_test
+      - macos_aarch64_build

    steps:
      - name: Determine current artifacts endpoint
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,7 @@ NashornProfile.txt
 **/JTreport/**
 **/JTwork/**
 /src/utils/LogCompilation/target/
+/.project/
+/.settings/
+*.class
+.idea/workspace.xml
--- a/README.md
+++ b/README.md
@@ -1,11 +1,174 @@
-# Welcome to the JDK!
+[![official JetBrains project](http://jb.gg/badges/official.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)

-For build instructions please see the
-[online documentation](https://openjdk.java.net/groups/build/doc/building.html),
-or either of these files:
+# Welcome to JetBrains Runtime!

- [doc/building.html](doc/building.html) (html version)
- [doc/building.md](doc/building.md) (markdown version)
+JetBrains Runtime is a fork of [OpenJDK](https://github.com/openjdk/jdk) available for Windows, Mac OS X, and Linux.
+It includes a number enhancements in font rendering, HiDPI support, ligatures, performance improvements, and bugfixes.

-See <https://openjdk.java.net/> for more information about
-the OpenJDK Community and the JDK.
+> **_NOTE_**: This is a **development** branch that is periodically synhronized with 
+> the [OpenJDK master](https://github.com/openjdk/jdk/tree/master) branch.
+> 
+> Release builds are based on these branches:
+> * [master](https://github.com/JetBrains/JetBrainsRuntime/tree/master) (JDK 11)
+> * [master17](https://github.com/JetBrains/JetBrainsRuntime/tree/master17) (JDK 17)
+
+
+## Contents
+- [Welcome to JetBrains Runtime](#jetbrains-runtime)
+  - [Products Built on JetBrains Runtime](#products-built-on-jetbrains-runtime)
+  - [Getting Sources](#getting-sources)
+    - [macOS, Linux](#macos-linux)
+    - [Windows](#sources-windows)
+  - [Configuring the Build Environment](#configuring-the-build-environment)
+    - [Linux (Docker)](#linux-docker)
+    - [Ubuntu Linux](#ubuntu-linux)
+    - [Windows](#build-windows)
+    - [macOS](#macos)
+  - [Developing](#developing)
+  - [Contributing](#contributing)
+  - [Resources](#resources)
+
+## Products Built on JetBrains Runtime
+* [Android Studio](https://developer.android.com/studio). The official IDE for Google's Android operating system.
+* [CLion](https://www.jetbrains.com/clion/). A cross-platform IDE for C and C++ from JetBrains.
+* [DataGrip](https://www.jetbrains.com/datagrip/). The IDE for Databases and SQL from JetBrains.
+* [GoLand](https://www.jetbrains.com/go/). The cross-platform Go IDE from JetBrains.
+* [IntelliJ IDEA](https://www.jetbrains.com/idea/). The IDE for JVM from JetBrains.
+* [JProfiler](https://www.ej-technologies.com/products/jprofiler/overview.html). The Java profiler.
+* [PhpStorm](https://www.jetbrains.com/phpstorm/). The PHP IDE from JetBrains.
+* [PyCharm](https://www.jetbrains.com/pycharm/). The Python IDE from JetBrains.
+* [Rider](https://www.jetbrains.com/rider/). The cross-platform .NET IDE from JetBrains.
+* [RubyMine](https://www.jetbrains.com/ruby/). The Ruby and Rails IDE from JetBrains.
+* [WebStorm](https://www.jetbrains.com/webstorm/). The JavaScript IDE from JetBrains.
+* [YourKit](https://www.yourkit.com/). Java and .NET profilers.
+
+## Getting Sources
+### macOS, Linux
+```
+git config --global core.autocrlf input
+git clone git@github.com:JetBrains/JetBrainsRuntime.git
+```
+
+### Windows
+<a name="sources-windows"></a>
+```
+git config --global core.autocrlf false
+git clone git@github.com:JetBrains/JetBrainsRuntime.git
+```
+
+## Configuring the Build Environment
+Here are quick per-platform instructions for those who can't wait to get started. 
+Please refer to [OpenJDK build docs](https://openjdk.java.net/groups/build/doc/building.html) for in-depth
+coverage of all the details.
+
+> **_TIP:_**  To get a preliminary report of what's missing, run `./configure` and check its output. 
+> It would usually have a meaningful advice on how to solve the problem.
+
+### Linux (Docker)
+Create a container:
+```
+$ cd jb/project/docker
+$ docker build .
+...
+Successfully built 942ea9900054
+```
+Run these commands in the new container:
+```
+$ docker run -v `pwd`../../../../:/JetBrainsRuntime -it 942ea9900054
+# cd /JetBrainsRuntime
+# sh ./configure
+# make images CONF=linux-x86_64-normal-server-release
+```
+
+### Ubuntu Linux
+Install the necessary tools, libraries, and headers with:
+```
+$ sudo apt-get install autoconf make build-essential libx11-dev libxext-dev libxrender-dev libxtst-dev \
+       libxt-dev libxrandr-dev libcups2-dev libfontconfig1-dev libasound2-dev
+```
+Get Java 17 (for instance, [Azul Zulu Builds of OpenJDK 17](https://www.azul.com/downloads/?version=java-17-ea&package=jdk)).
+
+Then run the following:
+```
+$ cd JetBrainsRuntime
+$ git checkout jbr-dev
+$ sh ./configure
+$ make images
+```
+This will build the release configuration under `./build/linux-x86_64-server-release/`.
+
+### Windows
+<a name="build-windows"></a>
+Install the following:
+* [Cygwin x64](http://www.cygwin.com/).
+  Required packages: `autoconf`, `binutils`, `cpio`, `diffutils`, `file`, `gawk`, `gcc-core`, `make`, `m4`, `unzip`, `zip`.  
+  Install those together with Cygwin.
+* [Visual Studio compiler toolset](https://visualstudio.microsoft.com/downloads/).
+  Install with the desktop development kit, which includes Windows SDK and compilers.
+  Visual Studio 2019 is supported by default.
+* Java 17 (for instance, [Azul Zulu Builds of OpenJDK 17](https://www.azul.com/downloads/?version=java-17-ea&os=windows&architecture=x86-64-bit&package=jdk).
+  If you have problems while configuring, read [Java tips on Cygwin](http://horstmann.com/articles/cygwin-tips.html).
+
+From the command line: 
+```
+"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" amd64
+"c:\Program_Files\cygwin64\bin\mintty.exe" /bin/bash -l
+```
+The first command sets up environment variables, the second starts a Cygwin shell with the proper environment.  
+
+In the Cygwin shell: 
+```
+$ cd JetBrainsRuntime
+$ git checkout jbr-dev
+$ bash configure --with-toolchain-version=2019
+$ make images
+```
+This will build the release configuration under `./build/windows-x86_64-server-release/`.
+
+### macOS
+Install the following:
+* Xcode command line developer tools and `autoconf` via [Homebrew](https://brew.sh/).
+* Java 17 (for instance, [Azul Zulu Builds of OpenJDK 17](https://www.azul.com/downloads/?version=java-17-ea&package=jdk)).
+
+From the command line:
+```
+$ cd JetBrainsRuntime
+$ git checkout jbr-dev
+$ sh ./configure
+$ make images
+```
+This will build the release configuration under `./build/macosx-x86_64-server-release/`.
+
+## Developing
+You can use  [CLion](https://www.jetbrains.com/clion/) to develop native parts of the JetBrains Runtime and
+[IntelliJ IDEA](https://www.jetbrains.com/idea/) for the parts written in Java.
+Both require projects to be created.
+
+### CLion
+Run
+```
+$ make compile-commands
+```
+in the git root and open the resulting `build/.../compile_commands.json` file as a project.
+Then use `Tools | Compilation Database | Change Project Root` to point to git root of this repository.
+
+See also this detailed step-by-step tutorial for all platforms:
+[How to develop OpenJDK with CLion](https://blog.jetbrains.com/clion/2020/03/openjdk-with-clion/).
+
+### IDEA
+Run
+```
+$ sh ./bin/idea.sh
+```
+in the git root to generate project files (add `--help` for options). If you have multiple
+configurations (for example, `release` and `fastdebug`), supply the `--conf <conf_name>` argument.
+Then open the git root directory as a project in IDEA.
+
+## Contributing
+We are happy to receive your pull requests! 
+Before you submit one, please sign our [Contributor License Agreement (CLA)](https://www.jetbrains.com/agreements/cla/).
+
+## Resources
+* [JetBrains Runtime on github](https://github.com/JetBrains/JetBrainsRuntime).
+* [OpenJDK build instructions](https://openjdk.java.net/groups/build/doc/building.html).
+* [OpenJDK test instructions](https://htmlpreview.github.io/?https://raw.githubusercontent.com/openjdk/jdk/master/doc/building.html#running-tests).
--- a/bin/idea.sh
+++ b/bin/idea.sh
@@ -25,7 +25,26 @@
 # Shell script for generating an IDEA project from a given list of modules

 usage() {
-      echo "usage: $0 [-h|--help] [-v|--verbose] [-o|--output <path>] [modules]+"
+      echo "Usage: $0 [-h|--help] [-q|--quiet] [-a|--absolute-paths] [-r|--root <path>] [-o|--output <path>] [-c|--conf <conf_name>] [modules...]"
+      echo "    -h | --help"
+      echo "    -q | --quiet
+        No stdout output"
+      echo "    -a | --absolute-paths
+        Use absolute paths to this jdk, so that generated .idea
+        project files can be moved independently of jdk sources"
+      echo "    -r | --root <path>
+        Project content root
+        Default: $TOPLEVEL_DIR"
+      echo "    -o | --output <path>
+        Where .idea directory with project files will be generated
+        (e.g. using '-o .' will place project files in './.idea')
+        Default: same as --root"
+      echo "    -c | --conf <conf_name>
+        make configuration (release, slowdebug etc)"
+      echo "    [modules...]
+        Generate project modules for specific java modules
+        (e.g. 'java.base java.desktop')
+        Default: all existing modules (java.* and jdk.*)"
      exit 1
 }

@@ -33,10 +52,14 @@ SCRIPT_DIR=`dirname $0`
 #assume TOP is the dir from which the script has been called
 TOP=`pwd`
 cd $SCRIPT_DIR; SCRIPT_DIR=`pwd`
+if [ "x$TOPLEVEL_DIR" = "x" ] ; then
+  cd .. ; TOPLEVEL_DIR=`pwd`
+fi
 cd $TOP;

-IDEA_OUTPUT=$TOP/.idea
-VERBOSE="false"
+VERBOSE=true
+ABSOLUTE_PATHS=false
+CONF_ARG=
 while [ $# -gt 0 ]
 do
  case $1 in
@@ -44,12 +67,26 @@ do
      usage
      ;;

-    -v | --vebose )
-      VERBOSE="true"
+    -q | --quiet )
+      VERBOSE=false
+      ;;
+
+    -a | --absolute-paths )
+      ABSOLUTE_PATHS=true
+      ;;
+
+    -r | --root )
+      TOPLEVEL_DIR="$2"
+      shift
      ;;

    -o | --output )
-      IDEA_OUTPUT=$2/.idea
+      IDEA_OUTPUT="$2/.idea"
+      shift
+      ;;
+
+    -c | --conf )
+      CONF_ARG="CONF_NAME=$2"
      shift
      ;;

@@ -64,20 +101,21 @@ do
  shift
 done

-mkdir -p $IDEA_OUTPUT || exit 1
-cd $IDEA_OUTPUT; IDEA_OUTPUT=`pwd`
-
-if [ "x$TOPLEVEL_DIR" = "x" ] ; then
-    cd $SCRIPT_DIR/..
-    TOPLEVEL_DIR=`pwd`
-    cd $IDEA_OUTPUT
+if [ "x$IDEA_OUTPUT" = "x" ] ; then
+  IDEA_OUTPUT="$TOPLEVEL_DIR/.idea"
 fi

-MAKE_DIR="$SCRIPT_DIR/../make"
-IDEA_MAKE="$MAKE_DIR/ide/idea/jdk"
+mkdir -p $IDEA_OUTPUT || exit 1
+cd "$TOP" ; cd $TOPLEVEL_DIR; TOPLEVEL_DIR=`pwd`
+cd "$TOP" ; cd $IDEA_OUTPUT; IDEA_OUTPUT=`pwd`
+cd ..; IDEA_OUTPUT_PARENT=`pwd`
+cd "$SCRIPT_DIR/.." ; OPENJDK_DIR=`pwd`
+
+IDEA_MAKE="$OPENJDK_DIR/make/ide/idea/jdk"
 IDEA_TEMPLATE="$IDEA_MAKE/template"

-cp -r "$IDEA_TEMPLATE"/* "$IDEA_OUTPUT"
+cp -rn "$TOPLEVEL_DIR/jb/project/idea-project-files"/* "$IDEA_OUTPUT"
+cp -rn "$IDEA_TEMPLATE"/* "$IDEA_OUTPUT"

 #override template
 if [ -d "$TEMPLATES_OVERRIDE" ] ; then
@@ -86,31 +124,31 @@ if [ -d "$TEMPLATES_OVERRIDE" ] ; then
    done
 fi

-if [ "$VERBOSE" = "true" ] ; then
-  echo "output dir: $IDEA_OUTPUT"
-  echo "idea template dir: $IDEA_TEMPLATE"
+if [ "$VERBOSE" = true ] ; then
+  echo "Will generate IDEA project files in \"$IDEA_OUTPUT\" for project \"$TOPLEVEL_DIR\""
 fi

-cd $TOP ; make -f "$IDEA_MAKE/idea.gmk" -I $MAKE_DIR/.. idea MAKEOVERRIDES= OUT=$IDEA_OUTPUT/env.cfg MODULES="$*" || exit 1
+cd $TOP ; make -f "$IDEA_MAKE/idea.gmk" -I "$OPENJDK_DIR" idea TOPLEVEL_DIR="$TOPLEVEL_DIR" \
+    MAKEOVERRIDES= IDEA_OUTPUT_PARENT="$IDEA_OUTPUT_PARENT" OUT="$IDEA_OUTPUT/env.cfg" MODULES="$*" $CONF_ARG || exit 1
 cd $SCRIPT_DIR

 . $IDEA_OUTPUT/env.cfg

-# Expect MODULE_ROOTS, MODULE_NAMES, BOOT_JDK & SPEC to be set
-if [ "x$MODULE_ROOTS" = "x" ] ; then
-  echo "FATAL: MODULE_ROOTS is empty" >&2; exit 1
+# Expect MODULES, MODULE_NAMES, RELATIVE_PROJECT_DIR, RELATIVE_BUILD_DIR to be set
+if [ "xMODULES" = "x" ] ; then
+  echo "FATAL: MODULES is empty" >&2; exit 1
 fi

 if [ "x$MODULE_NAMES" = "x" ] ; then
  echo "FATAL: MODULE_NAMES is empty" >&2; exit 1
 fi

-if [ "x$BOOT_JDK" = "x" ] ; then
-  echo "FATAL: BOOT_JDK is empty" >&2; exit 1
+if [ "x$RELATIVE_PROJECT_DIR" = "x" ] ; then
+  echo "FATAL: RELATIVE_PROJECT_DIR is empty" >&2; exit 1
 fi

-if [ "x$SPEC" = "x" ] ; then
-  echo "FATAL: SPEC is empty" >&2; exit 1
+if [ "x$RELATIVE_BUILD_DIR" = "x" ] ; then
+  echo "FATAL: RELATIVE_BUILD_DIR is empty" >&2; exit 1
 fi

 if [ -d "$TOPLEVEL_DIR/.hg" ] ; then
@@ -121,6 +159,43 @@ if [ -d "$TOPLEVEL_DIR/.git" ] ; then
    VCS_TYPE="Git"
 fi

+if [ "$ABSOLUTE_PATHS" = true ] ; then
+  if [ "x$PATHTOOL" != "x" ]; then
+    PROJECT_DIR="`$PATHTOOL -am $OPENJDK_DIR`"
+    TOPLEVEL_PROJECT_DIR="`$PATHTOOL -am $TOPLEVEL_DIR`"
+  else
+    PROJECT_DIR="$OPENJDK_DIR"
+    TOPLEVEL_PROJECT_DIR="$TOPLEVEL_DIR"
+  fi
+  MODULE_DIR="$PROJECT_DIR"
+  TOPLEVEL_MODULE_DIR="$TOPLEVEL_PROJECT_DIR"
+  cd "$IDEA_OUTPUT_PARENT" && cd "$RELATIVE_BUILD_DIR" && BUILD_DIR="`pwd`"
+  CLION_SCRIPT_TOPDIR="$OPENJDK_DIR"
+  CLION_PROJECT_DIR="$PROJECT_DIR"
+else
+  if [ "$RELATIVE_PROJECT_DIR" = "." ] ; then
+    PROJECT_DIR=""
+  else
+    PROJECT_DIR="/$RELATIVE_PROJECT_DIR"
+  fi
+  if [ "$RELATIVE_TOPLEVEL_PROJECT_DIR" = "." ] ; then
+    TOPLEVEL_PROJECT_DIR=""
+  else
+    TOPLEVEL_PROJECT_DIR="/$RELATIVE_TOPLEVEL_PROJECT_DIR"
+  fi
+  MODULE_DIR="\$MODULE_DIR\$$PROJECT_DIR"
+  PROJECT_DIR="\$PROJECT_DIR\$$PROJECT_DIR"
+  TOPLEVEL_MODULE_DIR="\$MODULE_DIR\$$TOPLEVEL_PROJECT_DIR"
+  TOPLEVEL_PROJECT_DIR="\$PROJECT_DIR\$$TOPLEVEL_PROJECT_DIR"
+  BUILD_DIR="\$PROJECT_DIR\$/$RELATIVE_BUILD_DIR"
+  CLION_SCRIPT_TOPDIR="$CLION_RELATIVE_PROJECT_DIR"
+  CLION_PROJECT_DIR="\$PROJECT_DIR\$/$CLION_SCRIPT_TOPDIR"
+fi
+if [ "$VERBOSE" = true ] ; then
+  echo "Project root: $PROJECT_DIR"
+  echo "Generating IDEA project files..."
+fi
+
 ### Replace template variables

 NUM_REPLACEMENTS=0
@@ -144,105 +219,106 @@ add_replacement() {
    eval TO$NUM_REPLACEMENTS='$2'
 }

+add_replacement "###PATHTOOL###" "$PATHTOOL"
+add_replacement "###CLION_SCRIPT_TOPDIR###" "$CLION_SCRIPT_TOPDIR"
+add_replacement "###CLION_PROJECT_DIR###" "$CLION_PROJECT_DIR"
+add_replacement "###PROJECT_DIR###" "$PROJECT_DIR"
+add_replacement "###MODULE_DIR###" "$MODULE_DIR"
+add_replacement "###TOPLEVEL_PROJECT_DIR###" "$TOPLEVEL_PROJECT_DIR"
+add_replacement "###TOPLEVEL_MODULE_DIR###" "$TOPLEVEL_MODULE_DIR"
 add_replacement "###MODULE_NAMES###" "$MODULE_NAMES"
 add_replacement "###VCS_TYPE###" "$VCS_TYPE"
-SPEC_DIR=`dirname $SPEC`
-if [ "x$CYGPATH" != "x" ]; then
-    add_replacement "###BUILD_DIR###" "`cygpath -am $SPEC_DIR`"
-    add_replacement "###IMAGES_DIR###" "`cygpath -am $SPEC_DIR`/images/jdk"
-    add_replacement "###ROOT_DIR###" "`cygpath -am $TOPLEVEL_DIR`"
-    add_replacement "###IDEA_DIR###" "`cygpath -am $IDEA_OUTPUT`"
+add_replacement "###BUILD_DIR###" "$BUILD_DIR"
+add_replacement "###RELATIVE_BUILD_DIR###" "$RELATIVE_BUILD_DIR"
+if [ "x$PATHTOOL" != "x" ]; then
+  add_replacement "###BASH_RUNNER_PREFIX###" "\$PROJECT_DIR\$/.idea/bash.bat"
+else
+  add_replacement "###BASH_RUNNER_PREFIX###" ""
+fi
+if [ "x$PATHTOOL" != "x" ]; then
    if [ "x$JT_HOME" = "x" ]; then
      add_replacement "###JTREG_HOME###" ""
    else
-      add_replacement "###JTREG_HOME###" "`cygpath -am $JT_HOME`"
-    fi
-elif [ "x$WSL_DISTRO_NAME" != "x" ]; then
-    add_replacement "###BUILD_DIR###" "`wslpath -am $SPEC_DIR`"
-    add_replacement "###IMAGES_DIR###" "`wslpath -am $SPEC_DIR`/images/jdk"
-    add_replacement "###ROOT_DIR###" "`wslpath -am $TOPLEVEL_DIR`"
-    add_replacement "###IDEA_DIR###" "`wslpath -am $IDEA_OUTPUT`"
-    if [ "x$JT_HOME" = "x" ]; then
-      add_replacement "###JTREG_HOME###" ""
-    else
-      add_replacement "###JTREG_HOME###" "`wslpath -am $JT_HOME`"
+      add_replacement "###JTREG_HOME###" "`$PATHTOOL -am $JT_HOME`"
    fi
 else
-    add_replacement "###BUILD_DIR###" "$SPEC_DIR"
    add_replacement "###JTREG_HOME###" "$JT_HOME"
-    add_replacement "###IMAGES_DIR###" "$SPEC_DIR/images/jdk"
-    add_replacement "###ROOT_DIR###" "$TOPLEVEL_DIR"
-    add_replacement "###IDEA_DIR###" "$IDEA_OUTPUT"
 fi

-SOURCE_PREFIX="<sourceFolder url=\"file://"
-SOURCE_POSTFIX="\" isTestSource=\"false\" />"
-
-for root in $MODULE_ROOTS; do
-    if [ "x$CYGPATH" != "x" ]; then
-      root=`cygpath -am $root`
-    elif [ "x$WSL_DISTRO_NAME" != "x" ]; then
-      root=`wslpath -am $root`
-    fi
-
-    VM_CI="jdk.internal.vm.ci/share/classes"
-    VM_COMPILER="src/jdk.internal.vm.compiler/share/classes"
-    if test "${root#*$VM_CI}" != "$root" || test "${root#*$VM_COMPILER}" != "$root"; then
-        for subdir in "$root"/*; do
-            if [ -d "$subdir" ]; then
-                SOURCES=$SOURCES" $SOURCE_PREFIX""$subdir"/src"$SOURCE_POSTFIX"
-            fi
-        done
-    else
-        SOURCES=$SOURCES" $SOURCE_PREFIX""$root""$SOURCE_POSTFIX"
-    fi
+MODULE_IMLS=""
+TEST_MODULE_DEPENDENCIES=""
+for module in $MODULE_NAMES; do
+    MODULE_IMLS="$MODULE_IMLS<module fileurl=\"file://\$PROJECT_DIR$/.idea/$module.iml\" filepath=\"\$PROJECT_DIR$/.idea/$module.iml\" /> "
+    TEST_MODULE_DEPENDENCIES="$TEST_MODULE_DEPENDENCIES<orderEntry type=\"module\" module-name=\"$module\" scope=\"TEST\" /> "
 done
-
-add_replacement "###SOURCE_ROOTS###" "$SOURCES"
+add_replacement "###MODULE_IMLS###" "$MODULE_IMLS"
+add_replacement "###TEST_MODULE_DEPENDENCIES###" "$TEST_MODULE_DEPENDENCIES"

 replace_template_dir "$IDEA_OUTPUT"

-### Compile the custom Logger
+### Generate module project files

-CLASSES=$IDEA_OUTPUT/classes
+if [ "$VERBOSE" = true ] ; then
+    echo "Generating project modules:"
+  fi
+(
+DEFAULT_IFS="$IFS"
+IFS='#'
+for value in $MODULES; do
+  (
+  eval "$value"
+  if [ "$VERBOSE" = true ] ; then
+    echo "    $module"
+  fi
+  MAIN_SOURCE_DIRS=""
+  CONTENT_ROOTS=""
+  IFS=' '
+  for dir in $moduleSrcDirs; do
+    case $dir in
+      "src/"*) MAIN_SOURCE_DIRS="$MAIN_SOURCE_DIRS <sourceFolder url=\"file://$MODULE_DIR/$dir\" isTestSource=\"false\" />" ;;
+      *"/support/gensrc/$module") ;; # Exclude generated sources to avoid module-info conflicts, see https://youtrack.jetbrains.com/issue/IDEA-185108
+      *) CONTENT_ROOTS="$CONTENT_ROOTS <content url=\"file://$MODULE_DIR/$dir\">\
+      <sourceFolder url=\"file://$MODULE_DIR/$dir\" isTestSource=\"false\" generated=\"true\" /></content>" ;;
+    esac
+  done
+  if [ "x$MAIN_SOURCE_DIRS" != "x" ] ; then
+    CONTENT_ROOTS="<content url=\"file://$MODULE_DIR/src/$module\">$MAIN_SOURCE_DIRS</content>$CONTENT_ROOTS"
+  fi
+  add_replacement "###MODULE_CONTENT_ROOTS###" "$CONTENT_ROOTS"
+  DEPENDENCIES=""
+  for dep in $moduleDependencies; do
+    case $MODULE_NAMES in # Exclude skipped modules from dependencies
+      *"$dep"*) DEPENDENCIES="$DEPENDENCIES<orderEntry type=\"module\" module-name=\"$dep\" /> "
+    esac
+  done
+  add_replacement "###DEPENDENCIES###" "$DEPENDENCIES"
+  cp "$IDEA_OUTPUT/module.iml" "$IDEA_OUTPUT/$module.iml"
+  IFS="$DEFAULT_IFS"
+  replace_template_file "$IDEA_OUTPUT/$module.iml"
+  )
+done
+)
+rm "$IDEA_OUTPUT/module.iml"

-if [ "x$ANT_HOME" = "x" ] ; then
-   # try some common locations, before giving up
-   if [ -f "/usr/share/ant/lib/ant.jar" ] ; then
-     ANT_HOME="/usr/share/ant"
-   elif [ -f "/usr/local/Cellar/ant/1.9.4/libexec/lib/ant.jar" ] ; then
-     ANT_HOME="/usr/local/Cellar/ant/1.9.4/libexec"
-   else
-     echo "FATAL: cannot find ant. Try setting ANT_HOME." >&2; exit 1
-   fi
-fi
-CP=$ANT_HOME/lib/ant.jar
-rm -rf $CLASSES; mkdir $CLASSES
+### Create shell script runner for Windows

-if [ "x$CYGPATH" != "x" ] ; then ## CYGPATH may be set in env.cfg
-  JAVAC_SOURCE_FILE=`cygpath -am $IDEA_OUTPUT/src/idea/IdeaLoggerWrapper.java`
-  JAVAC_SOURCE_PATH=`cygpath -am $IDEA_OUTPUT/src`
-  JAVAC_CLASSES=`cygpath -am $CLASSES`
-  JAVAC_CP=`cygpath -am $CP`
-  JAVAC=javac
-elif [ "x$WSL_DISTRO_NAME" != "x" ]; then
-  JAVAC_SOURCE_FILE=`realpath --relative-to=./ $IDEA_OUTPUT/src/idea/IdeaLoggerWrapper.java`
-  JAVAC_SOURCE_PATH=`realpath --relative-to=./ $IDEA_OUTPUT/src`
-  JAVAC_CLASSES=`realpath --relative-to=./ $CLASSES`
-  ANT_TEMP=`mktemp -d -p ./`
-  cp $ANT_HOME/lib/ant.jar $ANT_TEMP/ant.jar
-  JAVAC_CP=$ANT_TEMP/ant.jar
-  JAVAC=javac.exe
-else
-  JAVAC_SOURCE_FILE=$IDEA_OUTPUT/src/idea/IdeaLoggerWrapper.java
-  JAVAC_SOURCE_PATH=$IDEA_OUTPUT/src
-  JAVAC_CLASSES=$CLASSES
-  JAVAC_CP=$CP
-  JAVAC=javac
+if [ "x$PATHTOOL" != "x" ]; then
+  echo "@echo off" > "$IDEA_OUTPUT/bash.bat"
+  if [ "x$WSL_DISTRO_NAME" != "x" ] ; then
+    echo "wsl -d $WSL_DISTRO_NAME --cd \"%cd%\" -e %*" >> "$IDEA_OUTPUT/bash.bat"
+  else
+    echo "$WINENV_ROOT\bin\bash.exe -l -c \"cd %CD:\=/%/ && %*\"" >> "$IDEA_OUTPUT/bash.bat"
+  fi
 fi

-$BOOT_JDK/bin/$JAVAC -d $JAVAC_CLASSES -sourcepath $JAVAC_SOURCE_PATH -cp $JAVAC_CP $JAVAC_SOURCE_FILE

-if [ "x$WSL_DISTRO_NAME" != "x" ]; then
-  rm -rf $ANT_TEMP
+
+if [ "$VERBOSE" = true ] ; then
+  IDEA_PROJECT_DIR="`dirname $IDEA_OUTPUT`"
+  if [ "x$PATHTOOL" != "x" ]; then
+    IDEA_PROJECT_DIR="`$PATHTOOL -am $IDEA_PROJECT_DIR`"
+  fi
+  echo "
+Now you can open \"$IDEA_PROJECT_DIR\" as IDEA project
+You can also run 'bash \"$IDEA_OUTPUT/jdk-clion/update-project.sh\"' to generate Clion project"
 fi
--- a/0
+++ b/0
--- a/doc/building.html
+++ b/doc/building.html
@@ -76,7 +76,7 @@
 <li><a href="#specifying-the-target-platform">Specifying the Target Platform</a></li>
 <li><a href="#toolchain-considerations">Toolchain Considerations</a></li>
 <li><a href="#native-libraries">Native Libraries</a></li>
-<li><a href="#creating-and-using-sysroots-with-qemu-deboostrap">Creating And Using Sysroots With qemu-deboostrap</a></li>
+<li><a href="#cross-compiling-with-debian-sysroots">Cross compiling with Debian sysroots</a></li>
 <li><a href="#building-for-armaarch64">Building for ARM/aarch64</a></li>
 <li><a href="#building-for-musl">Building for musl</a></li>
 <li><a href="#verifying-the-build">Verifying the Build</a></li>
@@ -299,6 +299,7 @@
 <h3 id="microsoft-visual-studio">Microsoft Visual Studio</h3>
 <p>The minimum accepted version of Visual Studio is 2017. Older versions will not be accepted by <code>configure</code> and will not work. The maximum accepted version of Visual Studio is 2019.</p>
 <p>If you have multiple versions of Visual Studio installed, <code>configure</code> will by default pick the latest. You can request a specific version to be used by setting <code>--with-toolchain-version</code>, e.g. <code>--with-toolchain-version=2017</code>.</p>
+<p>If you have Visual Studio installed but <code>configure</code> fails to detect it, it may be because of <a href="#spaces-in-path">spaces in path</a>.</p>
 <h3 id="ibm-xl-cc">IBM XL C/C++</h3>
 <p>Please consult the AIX section of the <a href="https://wiki.openjdk.java.net/display/Build/Supported+Build+Platforms">Supported Build Platforms</a> OpenJDK Build Wiki page for details about which versions of XLC are supported.</p>
 <h2 id="boot-jdk-requirements">Boot JDK Requirements</h2>
@@ -319,6 +320,7 @@
 <li>To install on an apt-based Linux, try running <code>sudo apt-get install libfreetype6-dev</code>.</li>
 <li>To install on an rpm-based Linux, try running <code>sudo yum install freetype-devel</code>.</li>
 <li>To install on Alpine Linux, try running <code>sudo apk add freetype-dev</code>.</li>
+<li>To install on macOS, try running <code>brew install freetype</code>.</li>
 </ul>
 <p>Use <code>--with-freetype-include=&lt;path&gt;</code> and <code>--with-freetype-lib=&lt;path&gt;</code> if <code>configure</code> does not automatically locate the platform FreeType files.</p>
 <h3 id="cups">CUPS</h3>
@@ -504,7 +506,7 @@
 </ul>
 <h2 id="running-tests">Running Tests</h2>
 <p>Most of the JDK tests are using the <a href="http://openjdk.java.net/jtreg">JTReg</a> test framework. Make sure that your configuration knows where to find your installation of JTReg. If this is not picked up automatically, use the <code>--with-jtreg=&lt;path to jtreg home&gt;</code> option to point to the JTReg framework. Note that this option should point to the JTReg home, i.e. the top directory, containing <code>lib/jtreg.jar</code> etc.</p>
-<p>The <a href="https://wiki.openjdk.java.net/display/Adoption">Adoption Group</a> provides recent builds of jtreg <a href="https://ci.adoptopenjdk.net/view/Dependencies/job/jtreg/lastSuccessfulBuild/artifact">here</a>. Download the latest <code>.tar.gz</code> file, unpack it, and point <code>--with-jtreg</code> to the <code>jtreg</code> directory that you just unpacked.</p>
+<p>The <a href="https://wiki.openjdk.java.net/display/Adoption">Adoption Group</a> provides recent builds of jtreg <a href="https://ci.adoptopenjdk.net/view/Dependencies/job/dependency_pipeline/lastSuccessfulBuild/artifact/jtreg/">here</a>. Download the latest <code>.tar.gz</code> file, unpack it, and point <code>--with-jtreg</code> to the <code>jtreg</code> directory that you just unpacked.</p>
 <p>Building of Hotspot Gtest suite requires the source code of Google Test framework. The top directory, which contains both <code>googletest</code> and <code>googlemock</code> directories, should be specified via <code>--with-gtest</code>. The supported version of Google Test is 1.8.1, whose source code can be obtained:</p>
 <ul>
 <li>by downloading and unpacking the source bundle from <a href="https://github.com/google/googletest/releases/tag/release-1.8.1">here</a></li>
@@ -627,7 +629,7 @@ cp: cannot stat `arm-linux-gnueabihf/libSM.so&#39;: No such file or directory
 cp: cannot stat `arm-linux-gnueabihf/libXt.so&#39;: No such file or directory</code></pre></li>
 <li><p>If the X11 libraries are not properly detected by <code>configure</code>, you can point them out by <code>--with-x</code>.</p></li>
 </ul>
-<h3 id="creating-and-using-sysroots-with-qemu-deboostrap">Creating And Using Sysroots With qemu-deboostrap</h3>
+<h3 id="cross-compiling-with-debian-sysroots">Cross compiling with Debian sysroots</h3>
 <p>Fortunately, you can create sysroots for foreign architectures with tools provided by your OS. On Debian/Ubuntu systems, one could use <code>qemu-deboostrap</code> to create the <em>target</em> system chroot, which would have the native libraries and headers specific to that <em>target</em> system. After that, we can use the cross-compiler on the <em>build</em> system, pointing into chroot to get the build dependencies right. This allows building for foreign architectures with native compilation speed.</p>
 <p>For example, cross-compiling to AArch64 from x86_64 could be done like this:</p>
 <ul>
@@ -637,7 +639,7 @@ cp: cannot stat `arm-linux-gnueabihf/libXt.so&#39;: No such file or directory</c
 <pre><code>sudo qemu-debootstrap \
  --arch=arm64 \
  --verbose \
-  --include=fakeroot,symlinks,build-essential,libx11-dev,libxext-dev,libxrender-dev,libxrandr-dev,libxtst-dev,libxt-dev,libcups2-dev,libfontconfig1-dev,libasound2-dev,libfreetype6-dev,libpng-dev \
+  --include=fakeroot,symlinks,build-essential,libx11-dev,libxext-dev,libxrender-dev,libxrandr-dev,libxtst-dev,libxt-dev,libcups2-dev,libfontconfig1-dev,libasound2-dev,libfreetype6-dev,libpng-dev,libffi-dev \
  --resolve-deps \
  buster \
  ~/sysroot-arm64 \
@@ -645,67 +647,125 @@ cp: cannot stat `arm-linux-gnueabihf/libXt.so&#39;: No such file or directory</c
 <li><p>Make sure the symlinks inside the newly created chroot point to proper locations:</p>
 <pre><code>sudo chroot ~/sysroot-arm64 symlinks -cr .</code></pre></li>
 <li><p>Configure and build with newly created chroot as sysroot/toolchain-path:</p>
-<pre><code>CC=aarch64-linux-gnu-gcc CXX=aarch64-linux-gnu-g++ sh ./configure \
- --openjdk-target=aarch64-linux-gnu \
- --with-sysroot=~/sysroot-arm64 \
- --with-toolchain-path=~/sysroot-arm64 \
- --with-freetype-lib=~/sysroot-arm64/usr/lib/aarch64-linux-gnu/ \
- --with-freetype-include=~/sysroot-arm64/usr/include/freetype2/ \
- --x-libraries=~/sysroot-arm64/usr/lib/aarch64-linux-gnu/
+<pre><code>sh ./configure \
+  --openjdk-target=aarch64-linux-gnu \
+  --with-sysroot=~/sysroot-arm64
 make images
 ls build/linux-aarch64-server-release/</code></pre></li>
 </ul>
 <p>The build does not create new files in that chroot, so it can be reused for multiple builds without additional cleanup.</p>
+<p>The build system should automatically detect the toolchain paths and dependencies, but sometimes it might require a little nudge with:</p>
+<ul>
+<li><p>Native compilers: override <code>CC</code> or <code>CXX</code> for <code>./configure</code></p></li>
+<li><p>Freetype lib location: override <code>--with-freetype-lib</code>, for example <code>${sysroot}/usr/lib/${target}/</code></p></li>
+<li><p>Freetype includes location: override <code>--with-freetype-include</code> for example <code>${sysroot}/usr/include/freetype2/</code></p></li>
+<li><p>X11 libraries location: override <code>--x-libraries</code>, for example <code>${sysroot}/usr/lib/${target}/</code></p></li>
+</ul>
 <p>Architectures that are known to successfully cross-compile like this are:</p>
 <table>
 <thead>
 <tr class="header">
 <th style="text-align: left;">Target</th>
-<th style="text-align: left;"><code>CC</code></th>
-<th style="text-align: left;"><code>CXX</code></th>
-<th style="text-align: left;"><code>--arch=...</code></th>
+<th style="text-align: left;">Debian tree</th>
+<th style="text-align: left;">Debian arch</th>
 <th style="text-align: left;"><code>--openjdk-target=...</code></th>
+<th><code>--with-jvm-variants=...</code></th>
 </tr>
 </thead>
 <tbody>
 <tr class="odd">
 <td style="text-align: left;">x86</td>
-<td style="text-align: left;">default</td>
-<td style="text-align: left;">default</td>
+<td style="text-align: left;">buster</td>
 <td style="text-align: left;">i386</td>
 <td style="text-align: left;">i386-linux-gnu</td>
+<td>(all)</td>
 </tr>
 <tr class="even">
-<td style="text-align: left;">armhf</td>
-<td style="text-align: left;">gcc-arm-linux-gnueabihf</td>
-<td style="text-align: left;">g++-arm-linux-gnueabihf</td>
+<td style="text-align: left;">arm</td>
+<td style="text-align: left;">buster</td>
 <td style="text-align: left;">armhf</td>
 <td style="text-align: left;">arm-linux-gnueabihf</td>
+<td>(all)</td>
 </tr>
 <tr class="odd">
 <td style="text-align: left;">aarch64</td>
-<td style="text-align: left;">gcc-aarch64-linux-gnu</td>
-<td style="text-align: left;">g++-aarch64-linux-gnu</td>
+<td style="text-align: left;">buster</td>
 <td style="text-align: left;">arm64</td>
 <td style="text-align: left;">aarch64-linux-gnu</td>
+<td>(all)</td>
 </tr>
 <tr class="even">
-<td style="text-align: left;">ppc64el</td>
-<td style="text-align: left;">gcc-powerpc64le-linux-gnu</td>
-<td style="text-align: left;">g++-powerpc64le-linux-gnu</td>
+<td style="text-align: left;">ppc64le</td>
+<td style="text-align: left;">buster</td>
 <td style="text-align: left;">ppc64el</td>
 <td style="text-align: left;">powerpc64le-linux-gnu</td>
+<td>(all)</td>
 </tr>
 <tr class="odd">
 <td style="text-align: left;">s390x</td>
-<td style="text-align: left;">gcc-s390x-linux-gnu</td>
-<td style="text-align: left;">g++-s390x-linux-gnu</td>
+<td style="text-align: left;">buster</td>
 <td style="text-align: left;">s390x</td>
 <td style="text-align: left;">s390x-linux-gnu</td>
+<td>(all)</td>
+</tr>
+<tr class="even">
+<td style="text-align: left;">mipsle</td>
+<td style="text-align: left;">buster</td>
+<td style="text-align: left;">mipsel</td>
+<td style="text-align: left;">mipsel-linux-gnu</td>
+<td>zero</td>
+</tr>
+<tr class="odd">
+<td style="text-align: left;">mips64le</td>
+<td style="text-align: left;">buster</td>
+<td style="text-align: left;">mips64el</td>
+<td style="text-align: left;">mips64el-linux-gnueabi64</td>
+<td>zero</td>
+</tr>
+<tr class="even">
+<td style="text-align: left;">armel</td>
+<td style="text-align: left;">buster</td>
+<td style="text-align: left;">arm</td>
+<td style="text-align: left;">arm-linux-gnueabi</td>
+<td>zero</td>
+</tr>
+<tr class="odd">
+<td style="text-align: left;">ppc</td>
+<td style="text-align: left;">sid</td>
+<td style="text-align: left;">powerpc</td>
+<td style="text-align: left;">powerpc-linux-gnu</td>
+<td>zero</td>
+</tr>
+<tr class="even">
+<td style="text-align: left;">ppc64be</td>
+<td style="text-align: left;">sid</td>
+<td style="text-align: left;">ppc64</td>
+<td style="text-align: left;">powerpc64-linux-gnu</td>
+<td>(all)</td>
+</tr>
+<tr class="odd">
+<td style="text-align: left;">m68k</td>
+<td style="text-align: left;">sid</td>
+<td style="text-align: left;">m68k</td>
+<td style="text-align: left;">m68k-linux-gnu</td>
+<td>zero</td>
+</tr>
+<tr class="even">
+<td style="text-align: left;">alpha</td>
+<td style="text-align: left;">sid</td>
+<td style="text-align: left;">alpha</td>
+<td style="text-align: left;">alpha-linux-gnu</td>
+<td>zero</td>
+</tr>
+<tr class="odd">
+<td style="text-align: left;">sh4</td>
+<td style="text-align: left;">sid</td>
+<td style="text-align: left;">sh4</td>
+<td style="text-align: left;">sh4-linux-gnu</td>
+<td>zero</td>
 </tr>
 </tbody>
 </table>
-<p>Additional architectures might be supported by Debian/Ubuntu Ports.</p>
 <h3 id="building-for-armaarch64">Building for ARM/aarch64</h3>
 <p>A common cross-compilation target is the ARM CPU. When building for ARM, it is useful to set the ABI profile. A number of pre-defined ABI profiles are available using <code>--with-abi-profile</code>: arm-vfp-sflt, arm-vfp-hflt, arm-sflt, armv5-vfp-sflt, armv6-vfp-hflt. Note that soft-float ABIs are no longer properly supported by the JDK.</p>
 <h3 id="building-for-musl">Building for musl</h3>
@@ -819,6 +879,8 @@ Clock skew detected. Your build may be incomplete.</code></pre>
 cannot create ... Permission denied
 spawn failed</code></pre>
 <p>This can be a sign of a Cygwin problem. See the information about solving problems in the <a href="#cygwin">Cygwin</a> section. Rebooting the computer might help temporarily.</p>
+<h4 id="spaces-in-path">Spaces in Path</h4>
+<p>On Windows, when configuring, <code>fixpath.sh</code> may report that some directory names have spaces. Usually, it assumes those directories have <a href="https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-8dot3name">short paths</a>. You can run <code>fsutil file setshortname</code> in <code>cmd</code> on certain directories, such as <code>Microsoft Visual Studio</code> or <code>Windows Kits</code>, to assign arbitrary short paths so <code>configure</code> can access them.</p>
 <h3 id="getting-help">Getting Help</h3>
 <p>If none of the suggestions in this document helps you, or if you find what you believe is a bug in the build system, please contact the Build Group by sending a mail to <a href="mailto:build-dev@openjdk.java.net">build-dev@openjdk.java.net</a>. Please include the relevant parts of the configure and/or build log.</p>
 <p>If you need general help or advice about developing for the JDK, you can also contact the Adoption Group. See the section on <a href="#contributing-to-openjdk">Contributing to OpenJDK</a> for more information.</p>
@@ -846,7 +908,7 @@ sudo mv /tmp/configure /usr/local/bin</code></pre>
 <p>If you update the repository and part of the configure script has changed, the build system will force you to re-run <code>configure</code>.</p>
 <p>Most of the time, you will be fine by running <code>configure</code> again with the same arguments as the last time, which can easily be performed by <code>make reconfigure</code>. To simplify this, you can use the <code>CONF_CHECK</code> make control variable, either as <code>make CONF_CHECK=auto</code>, or by setting an environment variable. For instance, if you add <code>export CONF_CHECK=auto</code> to your <code>.bashrc</code> file, <code>make</code> will always run <code>reconfigure</code> automatically whenever the configure script has changed.</p>
 <p>You can also use <code>CONF_CHECK=ignore</code> to skip the check for a needed configure update. This might speed up the build, but comes at the risk of an incorrect build result. This is only recommended if you know what you're doing.</p>
-<p>From time to time, you will also need to modify the command line to <code>configure</code> due to changes. Use <code>make print-configure</code> to show the command line used for your current configuration.</p>
+<p>From time to time, you will also need to modify the command line to <code>configure</code> due to changes. Use <code>make print-configuration</code> to show the command line used for your current configuration.</p>
 <h3 id="using-fine-grained-make-targets">Using Fine-Grained Make Targets</h3>
 <p>The default behavior for make is to create consistent and correct output, at the expense of build speed, if necessary.</p>
 <p>If you are prepared to take some risk of an incorrect build, and know enough of the system to understand how things build and interact, you can speed up the build process considerably by instructing make to only build a portion of the product.</p>
--- a/doc/building.md
+++ b/doc/building.md
@@ -382,6 +382,9 @@ If you have multiple versions of Visual Studio installed, `configure` will by
 default pick the latest. You can request a specific version to be used by
 setting `--with-toolchain-version`, e.g. `--with-toolchain-version=2017`.

+If you have Visual Studio installed but `configure` fails to detect it, it may
+be because of [spaces in path](#spaces-in-path).
+
 ### IBM XL C/C++

 Please consult the AIX section of the [Supported Build Platforms](
@@ -451,6 +454,7 @@ rather than bundling the JDK's own copy.
  * To install on an rpm-based Linux, try running `sudo yum install
    freetype-devel`.
  * To install on Alpine Linux, try running `sudo apk add freetype-dev`.
+  * To install on macOS, try running `brew install freetype`.

 Use `--with-freetype-include=<path>` and `--with-freetype-lib=<path>`
 if `configure` does not automatically locate the platform FreeType files.
@@ -844,7 +848,7 @@ containing `lib/jtreg.jar` etc.

 The [Adoption Group](https://wiki.openjdk.java.net/display/Adoption) provides
 recent builds of jtreg [here](
-https://ci.adoptopenjdk.net/view/Dependencies/job/jtreg/lastSuccessfulBuild/artifact).
+https://ci.adoptopenjdk.net/view/Dependencies/job/dependency_pipeline/lastSuccessfulBuild/artifact/jtreg/).
 Download the latest `.tar.gz` file, unpack it, and point `--with-jtreg` to the
 `jtreg` directory that you just unpacked.

@@ -1086,7 +1090,7 @@ Note that X11 is needed even if you only want to build a headless JDK.
  * If the X11 libraries are not properly detected by `configure`, you can
    point them out by `--with-x`.

-### Creating And Using Sysroots With qemu-deboostrap
+### Cross compiling with Debian sysroots

 Fortunately, you can create sysroots for foreign architectures with tools
 provided by your OS. On Debian/Ubuntu systems, one could use `qemu-deboostrap` to
@@ -1107,7 +1111,7 @@ For example, cross-compiling to AArch64 from x86_64 could be done like this:
    sudo qemu-debootstrap \
      --arch=arm64 \
      --verbose \
-      --include=fakeroot,symlinks,build-essential,libx11-dev,libxext-dev,libxrender-dev,libxrandr-dev,libxtst-dev,libxt-dev,libcups2-dev,libfontconfig1-dev,libasound2-dev,libfreetype6-dev,libpng-dev \
+      --include=fakeroot,symlinks,build-essential,libx11-dev,libxext-dev,libxrender-dev,libxrandr-dev,libxtst-dev,libxt-dev,libcups2-dev,libfontconfig1-dev,libasound2-dev,libfreetype6-dev,libpng-dev,libffi-dev \
      --resolve-deps \
      buster \
      ~/sysroot-arm64 \
@@ -1121,13 +1125,9 @@ For example, cross-compiling to AArch64 from x86_64 could be done like this:

  * Configure and build with newly created chroot as sysroot/toolchain-path:
    ```
-    CC=aarch64-linux-gnu-gcc CXX=aarch64-linux-gnu-g++ sh ./configure \
-     --openjdk-target=aarch64-linux-gnu \
-     --with-sysroot=~/sysroot-arm64 \
-     --with-toolchain-path=~/sysroot-arm64 \
-     --with-freetype-lib=~/sysroot-arm64/usr/lib/aarch64-linux-gnu/ \
-     --with-freetype-include=~/sysroot-arm64/usr/include/freetype2/ \
-     --x-libraries=~/sysroot-arm64/usr/lib/aarch64-linux-gnu/
+    sh ./configure \
+      --openjdk-target=aarch64-linux-gnu \
+      --with-sysroot=~/sysroot-arm64
    make images
    ls build/linux-aarch64-server-release/
    ```
@@ -1135,17 +1135,34 @@ For example, cross-compiling to AArch64 from x86_64 could be done like this:
 The build does not create new files in that chroot, so it can be reused for multiple builds
 without additional cleanup.

+The build system should automatically detect the toolchain paths and dependencies, but sometimes
+it might require a little nudge with:
+
+  * Native compilers: override `CC` or `CXX` for `./configure`
+
+  * Freetype lib location: override `--with-freetype-lib`, for example `${sysroot}/usr/lib/${target}/`
+
+  * Freetype includes location: override `--with-freetype-include` for example `${sysroot}/usr/include/freetype2/`
+
+  * X11 libraries location: override `--x-libraries`, for example `${sysroot}/usr/lib/${target}/`
+
 Architectures that are known to successfully cross-compile like this are:

-  Target        `CC`                      `CXX`                       `--arch=...`  `--openjdk-target=...`
-  ------------  ------------------------- --------------------------- ------------- -----------------------
-  x86           default                   default                     i386          i386-linux-gnu
-  armhf         gcc-arm-linux-gnueabihf   g++-arm-linux-gnueabihf     armhf         arm-linux-gnueabihf
-  aarch64       gcc-aarch64-linux-gnu     g++-aarch64-linux-gnu       arm64         aarch64-linux-gnu
-  ppc64el       gcc-powerpc64le-linux-gnu g++-powerpc64le-linux-gnu   ppc64el       powerpc64le-linux-gnu
-  s390x         gcc-s390x-linux-gnu       g++-s390x-linux-gnu         s390x         s390x-linux-gnu
-
-Additional architectures might be supported by Debian/Ubuntu Ports.
+  Target        Debian tree  Debian arch   `--openjdk-target=...`   `--with-jvm-variants=...`
+  ------------  ------------ ------------- ------------------------ --------------
+  x86           buster       i386          i386-linux-gnu           (all)
+  arm           buster       armhf         arm-linux-gnueabihf      (all)
+  aarch64       buster       arm64         aarch64-linux-gnu        (all)
+  ppc64le       buster       ppc64el       powerpc64le-linux-gnu    (all)
+  s390x         buster       s390x         s390x-linux-gnu          (all)
+  mipsle        buster       mipsel        mipsel-linux-gnu         zero
+  mips64le      buster       mips64el      mips64el-linux-gnueabi64 zero
+  armel         buster       arm           arm-linux-gnueabi        zero
+  ppc           sid          powerpc       powerpc-linux-gnu        zero
+  ppc64be       sid          ppc64         powerpc64-linux-gnu      (all)
+  m68k          sid          m68k          m68k-linux-gnu           zero
+  alpha         sid          alpha         alpha-linux-gnu          zero
+  sh4           sid          sh4           sh4-linux-gnu            zero

 ### Building for ARM/aarch64

@@ -1466,6 +1483,15 @@ This can be a sign of a Cygwin problem. See the information about solving
 problems in the [Cygwin](#cygwin) section. Rebooting the computer might help
 temporarily.

+#### Spaces in Path
+
+On Windows, when configuring, `fixpath.sh` may report that some directory
+names have spaces. Usually, it assumes those directories have
+[short paths](https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/fsutil-8dot3name).
+You can run `fsutil file setshortname` in `cmd` on certain directories, such as
+`Microsoft Visual Studio` or `Windows Kits`, to assign arbitrary short paths so
+`configure` can access them.
+
 ### Getting Help

 If none of the suggestions in this document helps you, or if you find what you
@@ -1544,8 +1570,8 @@ update. This might speed up the build, but comes at the risk of an incorrect
 build result. This is only recommended if you know what you're doing.

 From time to time, you will also need to modify the command line to `configure`
-due to changes. Use `make print-configure` to show the command line used for
-your current configuration.
+due to changes. Use `make print-configuration` to show the command line used
+for your current configuration.

 ### Using Fine-Grained Make Targets

--- a/doc/hotspot-style.html
+++ b/doc/hotspot-style.html
@@ -94,6 +94,7 @@
 <li><p>All source files must have a globally unique basename. The build system depends on this uniqueness.</p></li>
 <li><p>Do not put non-trivial function implementations in .hpp files. If the implementation depends on other .hpp files, put it in a .cpp or a .inline.hpp file.</p></li>
 <li><p>.inline.hpp files should only be included in .cpp or .inline.hpp files.</p></li>
+<li><p>All .inline.hpp files should include their corresponding .hpp file as the first include line. Declarations needed by other files should be put in the .hpp file, and not in the .inline.hpp file. This rule exists to resolve problems with circular dependencies between .inline.hpp files.</p></li>
 <li><p>All .cpp files include precompiled.hpp as the first include line.</p></li>
 <li><p>precompiled.hpp is just a build time optimization, so don't rely on it to resolve include problems.</p></li>
 <li><p>Keep the include lines alphabetically sorted.</p></li>
@@ -303,6 +304,7 @@ while ( test_foo(args...) ) { // No, excess spaces around control</code></pre></
 <li><p>Defaulted and deleted functions (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">n2346</a>)</p></li>
 <li><p>Dynamic initialization and destruction with concurrency (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2660.htm">n2660</a>)</p></li>
 <li><p><code>final</code> virtual specifiers for classes and virtual functions (<a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm">n2928</a>), (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm">n3206</a>), (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm">n3272</a>)</p></li>
+<li><p><code>override</code> virtual specifiers for virtual functions (<a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm">n2928</a>), (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm">n3206</a>), (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm">n3272</a>)</p></li>
 <li><p>Local and unnamed types as template parameters (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm">n2657</a>)</p></li>
 <li><p>Range-based <code>for</code> loops (<a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2930.html">n2930</a>) (<a href="https://en.cppreference.com/w/cpp/language/range-for">range-for</a>)</p></li>
 </ul>
@@ -330,7 +332,6 @@ while ( test_foo(args...) ) { // No, excess spaces around control</code></pre></
 <h3 id="undecided-features">Undecided Features</h3>
 <p>This list is incomplete; it serves to explicitly call out some features that have not yet been discussed.</p>
 <ul>
-<li><p><code>overrides</code> virtual specifiers for virtual functions (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm">n3272</a>)</p></li>
 <li><p>Trailing return type syntax for functions (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2541.htm">n2541</a>)</p></li>
 <li><p>Variable templates (<a href="https://isocpp.org/files/papers/N3651.pdf">n3651</a>)</p></li>
 <li><p>Member initializers and aggregates (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3653.html">n3653</a>)</p></li>
--- a/doc/hotspot-style.md
+++ b/doc/hotspot-style.md
@@ -138,6 +138,11 @@ a .inline.hpp file.
 * .inline.hpp files should only be included in .cpp or .inline.hpp
 files.

+* All .inline.hpp files should include their corresponding .hpp file as
+the first include line. Declarations needed by other files should be put
+in the .hpp file, and not in the .inline.hpp file. This rule exists to
+resolve problems with circular dependencies between .inline.hpp files.
+
 * All .cpp files include precompiled.hpp as the first include line.

 * precompiled.hpp is just a build time optimization, so don't rely on
@@ -747,6 +752,11 @@ part of the avoidance of the C++ Standard Library in HotSpot code.
 ([n3206](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm)),
 ([n3272](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm))

+* `override` virtual specifiers for virtual functions
+([n2928](http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm)),
+([n3206](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm)),
+([n3272](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm))
+
 * Local and unnamed types as template parameters
 ([n2657](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm))

@@ -813,9 +823,6 @@ in HotSpot code because of the "no implicit boolean" guideline.)
 This list is incomplete; it serves to explicitly call out some
 features that have not yet been discussed.

-* `overrides` virtual specifiers for virtual functions 
-([n3272](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm))
-
 * Trailing return type syntax for functions 
 ([n2541](http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2541.htm))

--- a/jb/jdkdiff.py
+++ b/jb/jdkdiff.py
@@ -0,0 +1,230 @@
+#!/usr/bin/env python3
+
+import argparse
+import math
+import os.path
+import sys
+import subprocess
+
+
+def fatal(msg):
+    sys.stderr.write(f"[fatal] {msg}\n")
+    sys.exit(1)
+
+
+def verbose(options, *msg):
+    if options.verbose:
+        sys.stdout.write(f"[verbose] ")
+        sys.stdout.write(*msg)
+        sys.stdout.write('\n')
+
+
+def first_line(str):
+    return "" if not str else str.splitlines()[0]
+
+
+class Options:
+    def __init__(self):
+        ap = argparse.ArgumentParser(description="Show bugfixes differences between JBR and OpenJDK git repos",
+                                     epilog="Example: %(prog)s  --jdk ./jdk11u/ --jbr ./JetBrainsRuntime/ --path src/hotspot --limit 200")
+        ap.add_argument('--jdk', dest='jdkpath', help='path to OpenJDK git repo', required=True)
+        ap.add_argument('--jbr', dest='jbrpath', help='path to JBR git repo', required=True)
+        ap.add_argument('--path', dest='path', help='limit to changes in this path (relative to git root)')
+        ap.add_argument('--limit', dest='limit', help='limit to this many log entries in --jdk repo', type=int, default=-1)
+        ap.add_argument('-o', dest="output_dir", help="save patches to this directory (created if necessary)")
+        ap.add_argument('-v', dest='verbose', help="verbose output", default=False, action='store_true')
+        args = ap.parse_args()
+
+        if not os.path.isdir(args.jdkpath):
+            fatal(f"{args.jdkpath} not a directory")
+
+        if not os.path.isdir(args.jbrpath):
+            fatal(f"{args.jbrpath} not a directory")
+
+        if not git_is_available():
+            fatal("can't run git commands; make sure git is in PATH")
+
+        self.jdkpath = args.jdkpath
+        self.jbrpath = args.jbrpath
+        self.path = args.path
+        self.limit = args.limit
+        self.output_dir = args.output_dir
+        self.verbose = args.verbose
+
+
+class GitRepo:
+    def __init__(self, rootpath):
+        self.rootpath = rootpath
+
+    def run_git_cmd(self, git_args):
+        args = ["git", "-C", self.rootpath]
+        args.extend(git_args)
+        # print(f"Runnig git cmd '{' '.join(args)}'")
+        p = subprocess.run(args, capture_output=True, text=True)
+        if p.returncode != 0:
+            fatal(f"git returned non-zero code in {self.rootpath} ({first_line(p.stderr)})")
+        return p.stdout
+
+    def save_git_cmd(self, fname, git_args):
+        args = ["git", "-C", self.rootpath]
+        args.extend(git_args)
+        # print(f"Runnig git cmd '{' '.join(args)}'")
+        with open(fname, "w") as stdout_file:
+            p = subprocess.run(args, stdout=stdout_file)
+            if p.returncode != 0:
+                fatal(f"git returned non-zero code in {self.rootpath} ({first_line(p.stderr)})")
+
+    def current_branch(self):
+        branch_name = self.run_git_cmd(["branch", "--show-current"]).strip()
+        return branch_name
+
+    def log(self, path=None, limit=None):
+        cmds = ["log", "--no-decorate"]
+        if limit:
+            cmds.extend(["-n", str(limit)])
+        if path:
+            cmds.append(path)
+        full_log = self.run_git_cmd(cmds)
+        return full_log
+
+
+class Commit:
+    def __init__(self, lines):
+        self.sha = lines[0].split()[1]
+        self.message = ""
+        self.bugid = None
+
+        # Commit message starts after one blank line
+        read_message = False
+        for l in lines:
+            if read_message:
+                self.message += l + "\n"
+            if not read_message and l == "":
+                read_message = True
+
+        if self.message and self.message != "" and ":" in self.message:
+            maybe_bugid = self.message.split(":")[0].strip()
+            if 10 >= len(maybe_bugid) >= 4:
+                self.bugid = maybe_bugid
+
+
+class History:
+    def __init__(self, log):
+        log_itr = iter(log.splitlines())
+        self.commits = []
+        commit_lines = []
+        for line in log_itr:
+            if line.startswith("commit ") and len(commit_lines) > 0:
+                commit = Commit(commit_lines)
+                self.commits.append(commit)
+                commit_lines = []
+            commit_lines.append(line)
+
+        if len(commit_lines) > 0:
+            commit = Commit(commit_lines)
+            self.commits.append(commit)
+
+    def contains(self, str):
+        return any(str in commit.message for commit in self.commits)
+
+    def size(self):
+        return len(self.commits)
+
+
+def print_explanation(options, jdk, jbr):
+    verbose(options, f"Reading history from '{jdk.rootpath}' on branch '{jdk.current_branch()}'")
+    if options.path:
+        verbose(options, f"\t(only under '{options.path}')")
+    verbose(options, f"Searching for same fixes in '{jbr.rootpath}' on branch '{jbr.current_branch()}'")
+
+
+def git_is_available():
+    p = None
+    try:
+        p = subprocess.run(["git", "--help"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+    except:
+        pass
+    return p is not None and p.returncode == 0
+
+
+def main():
+    check_python_min_requirements()
+
+    options = Options()
+
+    jdk = GitRepo(options.jdkpath)
+    jbr = GitRepo(options.jbrpath)
+
+    print_explanation(options, jdk, jbr)
+
+    commits_to_save = []
+    try:
+        jdk_log = jdk.log(options.path, options.limit)
+        jdk_history = History(jdk_log)
+
+        jbr_log = jbr.log(options.path)
+        jbr_history = History(jbr_log)
+
+        verbose(options, f"Read {jdk_history.size()} commits in JDK, {jbr_history.size()} in JBR")
+
+        for c in jdk_history.commits:
+            if c.bugid:
+                verbose(options, f"Looking for bugfix for {c.bugid}")
+                if not jbr_history.contains(c.bugid):
+                    commits_to_save.append(c)
+                    print(f"[note] Fix for {c.bugid} not found in JBR ({jbr.rootpath})")
+                    print(f"    commit {c.sha}")
+                    print(f"    {first_line(c.message).strip()}")
+    except KeyboardInterrupt:
+        fatal("Interrupted")
+
+    if len(commits_to_save) > 0 and options.output_dir:
+        print()
+        if not os.path.exists(options.output_dir):
+            verbose(options, f"Creating output directory {options.output_dir}")
+            os.makedirs(options.output_dir)
+        nzeroes = len(str(len(commits_to_save)))
+        for i, c in enumerate(reversed(commits_to_save)):
+            fname = os.path.join(options.output_dir, f"{str(i).zfill(nzeroes)}-{c.bugid}.patch")
+            print(f"[note] {c.bugid} saved as {fname}")
+            fname = os.path.abspath(fname)
+            jdk.save_git_cmd(fname, ["format-patch", "-1", c.sha, "--stdout"])
+
+        script_fname = os.path.join(options.output_dir, "apply.sh")
+        with open(script_fname, "w") as script_file:
+            print(apply_script_code.format(os.path.abspath(jbr.rootpath), os.path.abspath(options.output_dir)),
+                  file=script_file)
+            print(f"[note] Execute 'bash {script_fname}' to apply patches to {jbr.rootpath}")
+
+
+def check_python_min_requirements():
+    if sys.version_info < (3, 6):
+        fatal("Minimum version 3.6 is required to run this script")
+
+
+apply_script_code = """
+#!/bin/bash
+
+GITROOT={0}
+PATCHROOT={1}
+
+cd $PATCHROOT || exit 1
+PATCHES=$(find $PATCHROOT -name '*.patch' | sort -n)
+
+for P in $PATCHES; do
+    git -C $GITROOT am $P
+    if [ $? != 0 ]; then
+        mv "$P" "$P.failed"
+        echo "[ERROR] Patch $P did not apply cleanly. Try applying it manually."
+        echo "[NOTE]  Execute this script to apply the remaining patches."
+        exit 1
+    else
+        mv "$P" "$P.done"
+    fi
+done
+
+echo "[NOTE] Done applying patches; check $PATCHROOT for .patch and .patch.failed to see if all have been applied."
+"""
+
+if __name__ == '__main__':
+    main()
--- a/jb/project/docker/Dockerfile
+++ b/jb/project/docker/Dockerfile
@@ -0,0 +1,13 @@
+# jetbrains/runtime:jbr15env
+FROM centos:7
+RUN yum -y install centos-release-scl
+RUN yum -y install devtoolset-8
+RUN yum -y install zip bzip2 unzip tar wget make autoconf automake libtool gcc gcc-c++ libstdc++-devel alsa-devel cups-devel xorg-x11-devel libjpeg62-devel giflib-devel freetype-devel file which libXtst-devel libXt-devel libXrender-devel alsa-lib-devel fontconfig-devel libXrandr-devel libXi-devel git
+# Install Java 16
+RUN wget https://cdn.azul.com/zulu/bin/zulu16.28.11-ca-jdk16.0.0-linux_x64.tar.gz \
+  -O - | tar xz -C /
+RUN mv /zulu16.28.11-ca-jdk16.0.0-linux_x64 /jdk16.0.0
+ENV PATH /opt/rh/devtoolset-8/root/usr/bin:$PATH
+RUN mkdir .git
+RUN git config user.email "teamcity@jetbrains.com"
+RUN git config user.name "builduser"
--- a/jb/project/docker/Dockerfile.x86
+++ b/jb/project/docker/Dockerfile.x86
@@ -0,0 +1,7 @@
+FROM i386/ubuntu:xenial
+
+RUN linux32 apt-get update && apt-get install -y --no-install-recommends apt-utils
+COPY jbrsdk-11.0.5-b1 /jbrsdk-11.0.5-b1
+RUN linux32 apt-get -y install file build-essential zip unzip curl libx11-dev libxext-dev \
+  libxrender-dev libxrandr-dev libxtst-dev libxt-dev libcups2-dev libasound2-data \
+  libpng12-0 libasound2 libfreetype6 libfontconfig1-dev libasound2-dev autoconf
--- a/jb/project/idea-project-files/copyright/JetBrains.xml
+++ b/jb/project/idea-project-files/copyright/JetBrains.xml
@@ -0,0 +1,9 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="notice" value="Copyright &amp;#36;originalComment.match(&quot;Copyright (\d+)&quot;, 1, &quot;-&quot;)&amp;#36;today.year JetBrains s.r.o.&#10;DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.&#10;&#10;This code is free software; you can redistribute it and/or modify it&#10;under the terms of the GNU General Public License version 2 only, as&#10;published by the Free Software Foundation.&#10;&#10;This code is distributed in the hope that it will be useful, but WITHOUT&#10;ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or&#10;FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License&#10;version 2 for more details (a copy is included in the LICENSE file that&#10;accompanied this code).&#10;&#10;You should have received a copy of the GNU General Public License version&#10;2 along with this work; if not, write to the Free Software Foundation,&#10;Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.&#10;&#10;Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA&#10;or visit www.oracle.com if you need additional information or have any&#10;questions." />
+    <option name="keyword" value="Copyright" />
+    <option name="allowReplaceKeyword" value="JetBrains" />
+    <option name="myName" value="JetBrains" />
+    <option name="myLocal" value="true" />
+  </copyright>
+</component>
--- a/jb/project/idea-project-files/copyright/profiles_settings.xml
+++ b/jb/project/idea-project-files/copyright/profiles_settings.xml
@@ -0,0 +1,3 @@
+<component name="CopyrightManager">
+  <settings default="JetBrains" />
+</component>
--- a/jb/project/idea-project-files/jdk-clion/.idea/.name
+++ b/jb/project/idea-project-files/jdk-clion/.idea/.name
@@ -0,0 +1 @@
+JetBrainsRuntime
--- a/jb/project/idea-project-files/jdk-clion/.idea/copyright/JetBrains.xml
+++ b/jb/project/idea-project-files/jdk-clion/.idea/copyright/JetBrains.xml
@@ -0,0 +1,9 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="notice" value="Copyright 2000-&amp;#36;today.year JetBrains s.r.o.&#10;&#10;Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);&#10;you may not use this file except in compliance with the License.&#10;You may obtain a copy of the License at&#10;&#10;http://www.apache.org/licenses/LICENSE-2.0&#10;&#10;Unless required by applicable law or agreed to in writing, software&#10;distributed under the License is distributed on an &quot;AS IS&quot; BASIS,&#10;WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.&#10;See the License for the specific language governing permissions and&#10;limitations under the License." />
+    <option name="keyword" value="Copyright" />
+    <option name="allowReplaceKeyword" value="JetBrains" />
+    <option name="myName" value="JetBrains" />
+    <option name="myLocal" value="true" />
+  </copyright>
+</component>
--- a/jb/project/idea-project-files/jdk-clion/.idea/copyright/profiles_settings.xml
+++ b/jb/project/idea-project-files/jdk-clion/.idea/copyright/profiles_settings.xml
@@ -0,0 +1,3 @@
+<component name="CopyrightManager">
+  <settings default="JetBrains" />
+</component>
--- a/jb/project/idea-project-files/jdk-clion/.idea/vcs.xml
+++ b/jb/project/idea-project-files/jdk-clion/.idea/vcs.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="IssueNavigationConfiguration">
+    <option name="links">
+      <list>
+        <IssueNavigationLink>
+          <option name="issueRegexp" value="(?:^|\s|\p{Punct})([A-Z]+\-\d+)(?=$|\s|\p{Punct})" />
+          <option name="linkRegexp" value="https://youtrack.jetbrains.com/issue/$1" />
+        </IssueNavigationLink>
+        <IssueNavigationLink>
+          <option name="issueRegexp" value="(?:^|\s|\p{Punct})(?:JDK-)?(\d{7})(?=$|\s|\p{Punct})" />
+          <option name="linkRegexp" value="https://bugs.openjdk.java.net/browse/JDK-$1" />
+        </IssueNavigationLink>
+      </list>
+    </option>
+  </component>
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/../.." vcs="Git" />
+  </component>
+</project>
--- a/jb/project/idea-project-files/vcs.xml
+++ b/jb/project/idea-project-files/vcs.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="IssueNavigationConfiguration">
+    <option name="links">
+      <list>
+        <IssueNavigationLink>
+          <option name="issueRegexp" value="(?:^|\s|\p{Punct})([A-Z]+\-\d+)(?=$|\s|\p{Punct})" />
+          <option name="linkRegexp" value="https://youtrack.jetbrains.com/issue/$1" />
+        </IssueNavigationLink>
+        <IssueNavigationLink>
+          <option name="issueRegexp" value="(?:^|\s|\p{Punct})(?:JDK-)?(\d{7})(?=$|\s|\p{Punct})" />
+          <option name="linkRegexp" value="https://bugs.openjdk.java.net/browse/JDK-$1" />
+        </IssueNavigationLink>
+      </list>
+    </option>
+  </component>
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
--- a/jb/project/java-gradle/build.gradle
+++ b/jb/project/java-gradle/build.gradle
@@ -0,0 +1,135 @@
+apply plugin: 'java'
+import org.gradle.internal.os.OperatingSystem
+
+repositories {
+    mavenCentral()
+}
+
+def test_jvm = {
+    if (project.hasProperty('jbsdkhome')) {
+        file(jbsdkhome + (OperatingSystem.current().isWindows()?"/bin/java.exe" : "/bin/java")).absolutePath
+    } else {
+        if (OperatingSystem.current().isMacOsX()) {
+            file('../../../build/macosx-x86_64-normal-server-release/images/jdk-bundle/jdk-11.0.4.jdk/Contents/Home/bin/java').absolutePath
+        } else if (OperatingSystem.current().isLinux()) {
+            file('../../../build/linux-x86_64-normal-server-release/images/jdk/bin/java').absolutePath
+        } else {
+            file('../../../build/windows-x86_64-normal-server-release/images/jdk/bin/java.exe').absolutePath
+        }
+    }
+}
+
+dependencies {
+    testCompile('junit:junit:4.12'){
+        exclude group: 'org.hamcrest'
+    }
+    testCompile 'org.hamcrest:hamcrest-library:1.3'
+    testCompile 'net.java.dev.jna:jna:4.4.0'
+    testCompile 'com.twelvemonkeys.imageio:imageio-tiff:3.3.2'
+    testCompile 'org.apache.commons:commons-lang3:3.0'
+}
+
+def jdk_modules = ["java.base", "java.logging", "java.prefs",
+               "java.se.ee", "java.sql", "java.datatransfer",
+               "java.management", "java.rmi", "java.security.jgss",
+               "java.sql.rowset", "java.desktop", "java.management.rmi",
+               "java.scripting", "java.security.sasl", "java.transaction",
+               "java.instrument", "java.naming", "java.se",
+               "java.smartcardio", "java.xml.crypto"]
+
+def jdk_class_dirs = []
+
+jdk_modules.collect(jdk_class_dirs) {
+    new File("../../../src/" + it + "/share/classes")
+}
+
+if (OperatingSystem.current().isMacOsX())
+    jdk_modules.collect(jdk_class_dirs) {
+        "../../../src/" + it + "/macosx/classes"
+    }
+else if (OperatingSystem.current().isLinux()) {
+    jdk_modules.collect(jdk_class_dirs) {
+        "../../../src/" + it + "/solaris/classes"
+    }
+    jdk_modules.collect(jdk_class_dirs) {
+        "../../../src/" + it + "/unix/classes"
+    }
+} else
+    jdk_modules.collect(jdk_class_dirs) {
+        "../../../src/" + it + "/windows/classes"
+    }
+
+sourceSets.main.java.srcDirs = jdk_class_dirs
+
+sourceSets {
+    test {
+        java {
+            srcDir "../../../test/jdk/jbu"
+        }
+    }
+}
+
+test.dependsOn.clear()
+
+test.dependsOn tasks.compileTestJava
+
+test {
+    systemProperty "jb.java2d.metal", "true"
+    systemProperty "testdata", file('../../../test/jdk/jbu/testdata').absolutePath
+
+//  Generate golden images for DroidFontTest and MixedTextTest
+//    systemProperty "gentestdata", ""
+
+//  Enable Java2D logging (https://confluence.jetbrains.com/display/JRE/Java2D+Rendering+Logging)
+//  systemProperty "sun.java2d.trace", "log"
+//  systemProperty "sun.java2d.trace", "log,pimpl"
+
+    outputs.upToDateWhen { false }
+    executable = test_jvm()
+
+//  Enable async/dtrace profiler
+    jvmArgs  "-XX:+PreserveFramePointer"
+//  Enable native J2D logging (only in debug build)
+//  Can be turned on for J2D by adding "#define DEBUG 1" into jdk/src/share/native/sun/java2d/Trace.h
+
+//    environment 'J2D_TRACE_LEVEL', '4'
+}
+
+def buildDir = project.buildscript.sourceFile.parentFile.parentFile.parentFile.parentFile
+
+def make_cmd = "make"
+if (OperatingSystem.current().isWindows()) {
+    def cyg_make_cmd = new File("c:/cygwin64/bin/make.exe")
+    if (cyg_make_cmd.exists()) make_cmd = cyg_make_cmd.absolutePath
+}
+def test_run = false
+task make_images {
+    doLast {
+        if (!test_run) {
+            def pb = new ProcessBuilder().command(make_cmd.toString(), "-C", buildDir.absolutePath, "images")
+            def proc = pb.redirectErrorStream(true).start()
+            proc.inputStream.eachLine { println it }
+            assert proc.waitFor() == 0
+        }
+    }
+}
+
+task make_clean {
+    doLast {
+        def pb = new ProcessBuilder().command(make_cmd.toString(), "-C", buildDir.absolutePath, "clean")
+        def proc = pb.redirectErrorStream(true).start()
+        proc.inputStream.eachLine { println it }
+        assert proc.waitFor() == 0
+    }
+}
+
+task run_test {
+    doLast {
+        test_run = true
+    }
+}
+
+tasks.cleanTest.dependsOn tasks.run_test
+classes.dependsOn.clear()
+classes.dependsOn tasks.make_images
+tasks.cleanClasses.dependsOn tasks.make_clean
--- a/jb/project/tools/common/scripts/common.sh
+++ b/jb/project/tools/common/scripts/common.sh
@@ -0,0 +1,64 @@
+VENDOR_NAME="JetBrains s.r.o."
+VENDOR_VERSION_STRING="JBR-${JBSDK_VERSION_WITH_DOTS}.${JDK_BUILD_NUMBER}-${build_number}"
+[ -z "$bundle_type" ] || VENDOR_VERSION_STRING="${VENDOR_VERSION_STRING}-${bundle_type}"
+
+do_reset_changes=0
+do_reset_dcevm=0
+HEAD_REVISION=0
+
+function do_exit() {
+  exit_code=$1
+  [ $do_reset_changes -eq 1 ] && git checkout HEAD modules.list src/java.desktop/share/classes/module-info.java
+  if [ $do_reset_dcevm -eq 1 ]; then
+    [ ! -z $HEAD_REVISION ] && git reset --hard $HEAD_REVISION
+  fi
+  exit "$exit_code"
+}
+
+function update_jsdk_mods() {
+  __jsdk=$1
+  __jcef_mods=$2
+  __orig_jsdk_mods=$3
+  __updated_jsdk_mods=$4
+  
+  # re-create java.desktop.jmod with updated module-info.class
+  tmp=.java.desktop.$$.tmp
+  mkdir "$tmp" || exit $?
+  "$__jsdk"/bin/jmod extract --dir "$tmp" "$__orig_jsdk_mods"/java.desktop.jmod || exit $?
+  "$__jsdk"/bin/javac \
+      --patch-module java.desktop="$__orig_jsdk_mods"/java.desktop.jmod \
+      --module-path "$__jcef_mods" -d "$tmp"/classes src/java.desktop/share/classes/module-info.java || exit $?
+  "$__jsdk"/bin/jmod \
+      create --class-path "$tmp"/classes --config "$tmp"/conf --header-files "$tmp"/include --legal-notice "$tmp"/legal --libs "$tmp"/lib \
+      java.desktop.jmod || exit $?
+  mv java.desktop.jmod "$__updated_jsdk_mods" || exit $?
+  rm -rf "$tmp"
+  
+  # re-create java.base.jmod with updated hashes
+  tmp=.java.base.$$.tmp
+  mkdir "$tmp" || exit $?
+  hash_modules=$("$JSDK"/bin/jmod describe "$__orig_jsdk_mods"/java.base.jmod | grep hashes | awk '{print $2}' | tr '\n' '|' | sed s/\|$//) || exit $?
+  "$__jsdk"/bin/jmod extract --dir "$tmp" "$__orig_jsdk_mods"/java.base.jmod || exit $?
+  rm "$__updated_jsdk_mods"/java.base.jmod || exit $? # temp exclude from path
+  "$__jsdk"/bin/jmod \
+      create --module-path "$__updated_jsdk_mods" --hash-modules "$hash_modules" \
+      --class-path "$tmp"/classes --cmds "$tmp"/bin --config "$tmp"/conf --header-files "$tmp"/include --legal-notice "$tmp"/legal --libs "$tmp"/lib \
+      java.base.jmod || exit $?
+  mv java.base.jmod "$__updated_jsdk_mods" || exit $?
+  rm -rf "$tmp"
+}
+
+function get_mods_list() {
+  __mods=$1
+  echo $(ls $__mods) | sed s/\.jmod/,/g | sed s/,$//g | sed s/' '//g
+}
+
+function copy_jmods() {
+  __mods_list=$1
+  __jmods_from=$2
+  __jmods_to=$3
+
+  mkdir -p $__jmods_to
+
+  echo "${__mods_list}," | while read -d, mod; do cp $__jmods_from/$mod.jmod $__jmods_to/; done
+}
--- a/jb/project/tools/linux/scripts/mkimages_aarch64.sh
+++ b/jb/project/tools/linux/scripts/mkimages_aarch64.sh
@@ -0,0 +1,84 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies the current version of OpenJDK e.g. 11_0_6
+#   JDK_BUILD_NUMBER - specifies the number of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+
+JBSDK_VERSION_WITH_DOTS=$(echo $JBSDK_VERSION | sed 's/_/\./g')
+
+source jb/project/tools/common/scripts/common.sh
+
+JBRSDK_BASE_NAME=jbrsdk-${JBSDK_VERSION}
+
+[ -z "$bundle_type" ] && (git apply -p0 < jb/project/tools/patches/exclude_jcef_module.patch || exit $?)
+
+sh configure \
+  --with-debug-level=release \
+  --with-vendor-name="${VENDOR_NAME}" \
+  --with-vendor-version-string="${VENDOR_VERSION_STRING}" \
+  --with-jvm-features=shenandoahgc \
+  --with-version-pre= \
+  --with-version-build="${JDK_BUILD_NUMBER}" \
+  --with-version-opt=b${build_number} \
+  --with-boot-jdk=${BOOT_JDK} \
+  --enable-cds=yes || exit $?
+make clean CONF=linux-aarch64-server-release || exit $?
+make images CONF=linux-aarch64-server-release test-image || exit $?
+
+JBSDK=${JBRSDK_BASE_NAME}-linux-aarch64-b${build_number}
+BASE_DIR=build/linux-aarch64-server-release/images
+JSDK=${BASE_DIR}/jdk
+JBRSDK_BUNDLE=jbrsdk
+
+echo Fixing permissions
+chmod -R a+r $JSDK
+
+rm -rf $BASE_DIR/$JBRSDK_BUNDLE
+cp -r $JSDK $BASE_DIR/$JBRSDK_BUNDLE || exit $?
+
+echo Creating $JBSDK.tar.gz ...
+sed 's/JBR/JBRSDK/g' ${BASE_DIR}/${JBRSDK_BUNDLE}/release > release
+mv release ${BASE_DIR}/${JBRSDK_BUNDLE}/release
+
+tar -pcf $JBSDK.tar \
+  --exclude=*.debuginfo --exclude=demo --exclude=sample --exclude=man \
+  -C $BASE_DIR ${JBRSDK_BUNDLE} || exit $?
+gzip $JBSDK.tar || exit $?
+
+JBR_BUNDLE=jbr
+JBR_BASE_NAME=jbr-$JBSDK_VERSION
+rm -rf $BASE_DIR/$JBR_BUNDLE
+
+JBR=$JBR_BASE_NAME-linux-aarch64-b$build_number
+grep -v javafx modules.list | grep -v "jdk.internal.vm\|jdk.aot\|jcef" > modules.list.aarch64
+echo Running jlink....
+${JSDK}/bin/jlink \
+  --module-path ${JSDK}/jmods --no-man-pages --compress=2 \
+  --add-modules $(xargs < modules.list.aarch64 | sed s/" "//g | sed s/',$'//g) \
+  --output ${BASE_DIR}/${JBR_BUNDLE} || exit $?
+
+echo Modifying release info ...
+grep -v \"^JAVA_VERSION\" ${JSDK}/release | grep -v \"^MODULES\" >> ${BASE_DIR}/${JBR_BUNDLE}/release
+
+echo Creating $JBR.tar.gz ...
+tar -pcf $JBR.tar -C $BASE_DIR ${JBR_BUNDLE} || exit $?
+gzip $JBR.tar || exit $?
+
+JBRSDK_TEST=$JBRSDK_BASE_NAME-linux-test-aarch64-b$build_number
+echo Creating $JBRSDK_TEST.tar.gz ...
+tar -pcf $JBRSDK_TEST.tar -C $BASE_DIR --exclude='test/jdk/demos' test || exit $?
+gzip $JBRSDK_TEST.tar || exit $?
--- a/jb/project/tools/linux/scripts/mkimages_x64.sh
+++ b/jb/project/tools/linux/scripts/mkimages_x64.sh
@@ -0,0 +1,139 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies major version of OpenJDK e.g. 11_0_6 (instead of dots '.' underbars "_" are used)
+#   JDK_BUILD_NUMBER - specifies update release of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#   bundle_type      - specifies bundle to be built; possible values:
+#                        <empty> or nomod - the release bundles without any additional modules (jcef)
+#                        jcef - the release bundles with jcef
+#                        fd - the fastdebug bundles which also include the jcef module
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+# Environment variables:
+#   JCEF_PATH - specifies the path to the directory with JCEF binaries.
+#               By default JCEF binaries should be located in ./jcef_linux_x64
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+bundle_type=$4
+JBSDK_VERSION_WITH_DOTS=$(echo $JBSDK_VERSION | sed 's/_/\./g')
+JCEF_PATH=${JCEF_PATH:=./jcef_linux_x64}
+
+source jb/project/tools/common/scripts/common.sh
+
+function create_image_bundle {
+  __bundle_name=$1
+  __arch_name=$2
+  __modules_path=$3
+  __modules=$4
+
+  [ "$bundle_type" == "fd" ] && [ "$__arch_name" == "$JBRSDK_BUNDLE" ] && __bundle_name=$__arch_name && fastdebug_infix="fastdebug-"
+  JBR=${__bundle_name}-${JBSDK_VERSION}-linux-x64-${fastdebug_infix}b${build_number}
+
+  echo Running jlink....
+  [ -d "$IMAGES_DIR"/"$__arch_name" ] && rm -rf "${IMAGES_DIR:?}"/"$__arch_name"
+  $JSDK/bin/jlink \
+    --module-path "$__modules_path" --no-man-pages --compress=2 \
+    --add-modules "$__modules" --output "$IMAGES_DIR"/"$__arch_name"
+
+  grep -v "^JAVA_VERSION" "$JSDK"/release | grep -v "^MODULES" >> "$IMAGES_DIR"/"$__arch_name"/release
+  if [ "$__arch_name" == "$JBRSDK_BUNDLE" ]; then
+    sed 's/JBR/JBRSDK/g' "$IMAGES_DIR"/"$__arch_name"/release > release
+    mv release "$IMAGES_DIR"/"$__arch_name"/release
+    copy_jmods "$__modules" "$__modules_path" "$IMAGES_DIR"/"$__arch_name"/jmods
+  fi
+
+  # jmod does not preserve file permissions (JDK-8173610)
+  [ -f "$IMAGES_DIR"/"$__arch_name"/lib/jcef_helper ] && chmod a+x "$IMAGES_DIR"/"$__arch_name"/lib/jcef_helper
+
+  echo Creating "$JBR".tar.gz ...
+  tar -pcf "$JBR".tar -C "$IMAGES_DIR" "$__arch_name" || do_exit $?
+  [ -f "$JBR".tar.gz ] && rm "$JBR.tar.gz"
+  gzip "$JBR".tar || do_exit $?
+  rm -rf "${IMAGES_DIR:?}"/"$__arch_name"
+}
+
+WITH_DEBUG_LEVEL="--with-debug-level=release"
+RELEASE_NAME=linux-x86_64-server-release
+
+case "$bundle_type" in
+  "jcef")
+    do_reset_changes=0
+    ;;
+  "dcevm")
+    HEAD_REVISION=$(git rev-parse HEAD)
+    git am jb/project/tools/patches/dcevm/*.patch || do_exit $?
+    do_reset_dcevm=0
+    do_reset_changes=0
+    ;;
+  "nomod" | "")
+    bundle_type=""
+    ;;
+  "fd")
+    do_reset_changes=0
+    WITH_DEBUG_LEVEL="--with-debug-level=fastdebug"
+    RELEASE_NAME=linux-x86_64-server-fastdebug
+    ;;
+esac
+
+sh configure \
+  $WITH_DEBUG_LEVEL \
+  --with-vendor-name="$VENDOR_NAME" \
+  --with-vendor-version-string="$VENDOR_VERSION_STRING" \
+  --with-jvm-features=shenandoahgc \
+  --with-version-pre= \
+  --with-version-build="$JDK_BUILD_NUMBER" \
+  --with-version-opt=b"$build_number" \
+  --with-boot-jdk="$BOOT_JDK" \
+  --enable-cds=yes || do_exit $?
+
+make clean CONF=$RELEASE_NAME || exit $?
+make images CONF=$RELEASE_NAME || do_exit $?
+
+IMAGES_DIR=build/$RELEASE_NAME/images
+JSDK=$IMAGES_DIR/jdk
+JSDK_MODS_DIR=$IMAGES_DIR/jmods
+JBRSDK_BUNDLE=jbrsdk
+
+echo Fixing permissions
+chmod -R a+r $JSDK
+
+if [ "$bundle_type" == "jcef" ] || [ "$bundle_type" == "dcevm" ] || [ "$bundle_type" == "fd" ]; then
+  git apply -p0 < jb/project/tools/patches/add_jcef_module.patch || do_exit $?
+  update_jsdk_mods $JSDK $JCEF_PATH/jmods $JSDK/jmods $JSDK_MODS_DIR || do_exit $?
+  cp $JCEF_PATH/jmods/* $JSDK_MODS_DIR # $JSDK/jmods is not changed
+
+  jbr_name_postfix="_${bundle_type}"
+  [ "$bundle_type" != "fd" ] && jbrsdk_name_postfix="_${bundle_type}"
+fi
+
+# create runtime image bundle
+modules=$(xargs < modules.list | sed s/" "//g) || do_exit $?
+create_image_bundle "jbr${jbr_name_postfix}" "jbr" $JSDK_MODS_DIR "$modules" || do_exit $?
+
+# create sdk image bundle
+modules=$(cat $JSDK/release | grep MODULES | sed s/MODULES=//g | sed s/' '/','/g | sed s/\"//g | sed s/\\n//g) || do_exit $?
+if [ "$bundle_type" == "jcef" ] || [ "$bundle_type" == "dcevm" ] || [ "$bundle_type" == "fd" ] || [ "$bundle_type" == "$JBRSDK_BUNDLE" ]; then
+  modules=${modules},$(get_mods_list "$JCEF_PATH"/jmods)
+fi
+create_image_bundle "$JBRSDK_BUNDLE${jbr_name_postfix}" $JBRSDK_BUNDLE $JSDK_MODS_DIR "$modules" || do_exit $?
+
+if [ -z "$bundle_type" ]; then
+    JBRSDK_TEST=${JBRSDK_BUNDLE}-${JBSDK_VERSION}-linux-test-x64-b${build_number}
+    echo Creating "$JBRSDK_TEST" ...
+    make test-image CONF=$RELEASE_NAME || do_exit $?
+    tar -pcf "$JBRSDK_TEST".tar -C $IMAGES_DIR --exclude='test/jdk/demos' test || do_exit $?
+    [ -f "$JBRSDK_TEST.tar.gz" ] && rm "$JBRSDK_TEST.tar.gz"
+    gzip "$JBRSDK_TEST".tar || do_exit $?
+fi
+
+do_exit 0
--- a/jb/project/tools/linux/scripts/mkimages_x86.sh
+++ b/jb/project/tools/linux/scripts/mkimages_x86.sh
@@ -0,0 +1,80 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies the current version of OpenJDK e.g. 11_0_6
+#   JDK_BUILD_NUMBER - specifies the number of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+
+JBSDK_VERSION_WITH_DOTS=$(echo $JBSDK_VERSION | sed 's/_/\./g')
+
+source jb/project/tools/common/scripts/common.sh
+
+JBRSDK_BASE_NAME=jbrsdk-${JBSDK_VERSION}
+
+[ -z "$bundle_type" ] && (git apply -p0 < jb/project/tools/patches/exclude_jcef_module.patch || exit $?)
+
+linux32 bash configure \
+  --with-debug-level=release \
+  --with-vendor-name="${VENDOR_NAME}" \
+  --with-vendor-version-string="${VENDOR_VERSION_STRING}" \
+  --with-version-pre= \
+  --with-version-build=$JDK_BUILD_NUMBER \
+  --with-version-opt=b${build_number} \
+  --with-boot-jdk=${BOOT_JDK} \
+  --enable-cds=yes || exit $?
+make clean CONF=linux-x86-server-release || exit $?
+make images CONF=linux-x86-server-release test-image || exit $?
+
+JBSDK=${JBRSDK_BASE_NAME}-linux-x86-b${build_number}
+BASE_DIR=build/linux-x86-server-release/images
+JSDK=${BASE_DIR}/jdk
+JBRSDK_BUNDLE=jbrsdk
+
+echo Fixing permissions
+chmod -R a+r $JSDK
+
+rm -rf $BASE_DIR/$JBRSDK_BUNDLE
+cp -r $JSDK $BASE_DIR/$JBRSDK_BUNDLE || exit $?
+
+echo Creating $JBSDK.tar.gz ...
+sed 's/JBR/JBRSDK/g' ${BASE_DIR}/${JBRSDK_BUNDLE}/release > release
+mv release ${BASE_DIR}/${JBRSDK_BUNDLE}/release
+
+tar -pcf $JBSDK.tar --exclude=*.debuginfo --exclude=demo --exclude=sample --exclude=man -C $BASE_DIR ${JBRSDK_BUNDLE} || exit $?
+gzip $JBSDK.tar || exit $?
+
+JBR_BUNDLE=jbr
+JBR_BASE_NAME=jbr-$JBSDK_VERSION
+rm -rf $BASE_DIR/$JBR_BUNDLE
+
+JBR=$JBR_BASE_NAME-linux-x86-b$build_number
+grep -v javafx modules.list | grep -v "jdk.internal.vm\|jdk.aot\|jcef" > modules.list.x86
+echo Running jlink....
+${JSDK}/bin/jlink \
+  --module-path ${JSDK}/jmods --no-man-pages --compress=2 \
+  --add-modules $(xargs < modules.list.x86 | sed s/" "//g | sed s/,$//g) --output ${BASE_DIR}/${JBR_BUNDLE} || exit $?
+
+echo Modifying release info ...
+grep -v \"^JAVA_VERSION\" ${JSDK}/release | grep -v \"^MODULES\" >> ${BASE_DIR}/${JBR_BUNDLE}/release
+
+echo Creating $JBR.tar.gz ...
+tar -pcf $JBR.tar -C $BASE_DIR $JBR_BUNDLE || exit $?
+gzip $JBR.tar || exit $?
+
+JBRSDK_TEST=$JBRSDK_BASE_NAME-linux-test-x86-b$build_number
+echo Creating $JBRSDK_TEST.tar.gz ...
+tar -pcf $JBRSDK_TEST.tar -C $BASE_DIR --exclude='test/jdk/demos' --exclude='test/hotspot/gtest' test || exit $?
+gzip $JBRSDK_TEST.tar || exit $?
--- a/jb/project/tools/mac/scripts/entitlements.xml
+++ b/jb/project/tools/mac/scripts/entitlements.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+    <dict>
+        <key>com.apple.security.cs.allow-jit</key>
+        <true/>
+        <key>com.apple.security.cs.allow-unsigned-executable-memory</key>
+        <true/>
+        <key>com.apple.security.cs.allow-dyld-environment-variables</key>
+        <true/>
+        <key>com.apple.security.cs.disable-library-validation</key>
+        <true/>
+        <key>com.apple.security.cs.disable-executable-page-protection</key>
+        <true/>
+    </dict>
+</plist>
--- a/jb/project/tools/mac/scripts/mkimages.sh
+++ b/jb/project/tools/mac/scripts/mkimages.sh
@@ -0,0 +1,178 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies major version of OpenJDK e.g. 11_0_6 (instead of dots '.' underbars "_" are used)
+#   JDK_BUILD_NUMBER - specifies update release of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#   bundle_type      - specifies bundle to be built; possible values:
+#                        <empty> or nomod - the release bundles without any additional modules (jcef)
+#                        jcef - the release bundles with jcef
+#                        fd - the fastdebug bundles which also include the jcef module
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+# Environment variables:
+#   JCEF_PATH - specifies the path to the directory with JCEF binaries.
+#               By default JCEF binaries should be located in ./jcef_mac
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+bundle_type=$4
+architecture=$5 # aarch64 or x64
+enable_aot=$6 # temporary param for building test jre with aot under aarch64
+JBSDK_VERSION_WITH_DOTS=$(echo $JBSDK_VERSION | sed 's/_/\./g')
+WITH_IMPORT_MODULES="--with-import-modules=${MODULAR_SDK_PATH:=./modular-sdk}"
+JCEF_PATH=${JCEF_PATH:=./jcef_mac}
+architecture=${architecture:=x64}
+MAJOR_JBSDK_VERSION=$(echo "$JBSDK_VERSION_WITH_DOTS" | awk -F "." '{print $1}')
+BOOT_JDK=${BOOT_JDK:=$(/usr/libexec/java_home -v 16)}
+
+source jb/project/tools/common/scripts/common.sh
+
+function copyJNF {
+  __contents_dir=$1
+    mkdir -p ${__contents_dir}/Frameworks
+    cp -Rp Frameworks/JavaNativeFoundation.framework ${__contents_dir}/Frameworks
+}
+
+function create_image_bundle {
+  __bundle_name=$1
+  __arch_name=$2
+  __modules_path=$3
+  __modules=$4
+
+  tmp=.bundle.$$.tmp
+  mkdir "$tmp" || do_exit $?
+
+  [ "$bundle_type" == "fd" ] && [ "$__arch_name" == "$JBRSDK_BUNDLE" ] && __bundle_name=$__arch_name && fastdebug_infix="fastdebug-"
+  JBR=${__bundle_name}-${JBSDK_VERSION}-osx-${architecture}-${fastdebug_infix}b${build_number}
+
+  JRE_CONTENTS=$tmp/$__arch_name/Contents
+  mkdir -p "$JRE_CONTENTS" || do_exit $?
+
+  echo Running jlink...
+  "$JSDK"/bin/jlink \
+    --module-path "$__modules_path" --no-man-pages --compress=2 \
+    --add-modules "$__modules" --output "$JRE_CONTENTS/Home" || do_exit $?
+
+  grep -v "^JAVA_VERSION" "$JSDK"/release | grep -v "^MODULES" >> "$JRE_CONTENTS/Home/release"
+  if [ "$__arch_name" == "$JBRSDK_BUNDLE" ]; then
+    sed 's/JBR/JBRSDK/g' $JRE_CONTENTS/Home/release > release
+    mv release $JRE_CONTENTS/Home/release
+    copy_jmods "$__modules" "$__modules_path" "$JRE_CONTENTS"/Home/jmods
+  fi
+
+  cp -R "$JSDK"/../MacOS "$JRE_CONTENTS"
+  cp "$JSDK"/../Info.plist "$JRE_CONTENTS"
+
+  if [[ "${architecture}" == *aarch64* ]]; then
+    # we can't notarize this library as usual framework (with headers and tbd-file)
+    # but single library notarizes correctly
+    copyJNF $JRE_CONTENTS
+  fi
+
+  [ -n "$bundle_type" ] && (cp -a $JCEF_PATH/Frameworks "$JRE_CONTENTS" || do_exit $?)
+
+  echo Creating "$JBR".tar.gz ...
+  COPYFILE_DISABLE=1 tar -pczf "$JBR".tar.gz --exclude='*.dSYM' --exclude='man' -C "$tmp" "$__arch_name" || do_exit $?
+  rm -rf "$tmp"
+}
+
+WITH_DEBUG_LEVEL="--with-debug-level=release"
+CONF_ARCHITECTURE=x86_64
+if [[ "${architecture}" == *aarch64* ]]; then
+  CONF_ARCHITECTURE=aarch64
+fi
+RELEASE_NAME=macosx-${CONF_ARCHITECTURE}-server-release
+
+case "$bundle_type" in
+  "jcef")
+    do_reset_changes=0
+    ;;
+  "dcevm")
+    HEAD_REVISION=$(git rev-parse HEAD)
+    git am jb/project/tools/patches/dcevm/*.patch || do_exit $?
+    do_reset_dcevm=0
+    do_reset_changes=0
+    ;;
+  "nomod" | "")
+    bundle_type=""
+    ;;
+  "fd")
+    do_reset_changes=0
+    WITH_DEBUG_LEVEL="--with-debug-level=fastdebug"
+    RELEASE_NAME=macosx-${CONF_ARCHITECTURE}-server-fastdebug
+    JBSDK=macosx-${architecture}-server-release
+    ;;
+esac
+
+if [[ "${architecture}" == *aarch64* ]]; then
+  sh configure \
+    $WITH_DEBUG_LEVEL \
+    --with-vendor-name="${VENDOR_NAME}" \
+    --with-vendor-version-string="${VENDOR_VERSION_STRING}" \
+    --with-jvm-features=shenandoahgc \
+    --with-version-pre= \
+    --with-version-build="${JDK_BUILD_NUMBER}" \
+    --with-version-opt=b"${build_number}" \
+    --with-boot-jdk="$BOOT_JDK" \
+    --disable-hotspot-gtest --disable-javac-server --disable-full-docs --disable-manpages \
+    --enable-cds=no \
+    --with-extra-cflags="-F$(pwd)/Frameworks" \
+    --with-extra-cxxflags="-F$(pwd)/Frameworks" \
+    --with-extra-ldflags="-F$(pwd)/Frameworks" || do_exit $?
+else
+  sh configure \
+    $WITH_DEBUG_LEVEL \
+    --with-vendor-name="$VENDOR_NAME" \
+    --with-vendor-version-string="$VENDOR_VERSION_STRING" \
+    --with-jvm-features=shenandoahgc \
+    --with-version-pre= \
+    --with-version-build="$JDK_BUILD_NUMBER" \
+    --with-version-opt=b"$build_number" \
+    --with-boot-jdk="$BOOT_JDK" \
+    --enable-cds=yes || do_exit $?
+fi
+make clean CONF=$RELEASE_NAME || do_exit $?
+make images CONF=$RELEASE_NAME || do_exit $?
+
+IMAGES_DIR=build/$RELEASE_NAME/images
+JSDK=$IMAGES_DIR/jdk-bundle/jdk-$MAJOR_JBSDK_VERSION.jdk/Contents/Home
+JSDK_MODS_DIR=$IMAGES_DIR/jmods
+JBRSDK_BUNDLE=jbrsdk
+
+if [ "$bundle_type" == "jcef" ] || [ "$bundle_type" == "dcevm" ] || [ "$bundle_type" == "fd" ]; then
+  git apply -p0 < jb/project/tools/patches/add_jcef_module.patch || do_exit $?
+  update_jsdk_mods "$JSDK" "$JCEF_PATH"/jmods "$JSDK"/jmods "$JSDK_MODS_DIR" || do_exit $?
+  cp $JCEF_PATH/jmods/* $JSDK_MODS_DIR # $JSDK/jmods is not changed
+
+  jbr_name_postfix="_${bundle_type}"
+fi
+
+# create runtime image bundle
+modules=$(xargs < modules.list | sed s/" "//g) || do_exit $?
+create_image_bundle "jbr${jbr_name_postfix}" "jbr" $JSDK_MODS_DIR "$modules" || do_exit $?
+
+# create sdk image bundle
+modules=$(cat "$JSDK"/release | grep MODULES | sed s/MODULES=//g | sed s/' '/','/g | sed s/\"//g | sed s/\\n//g) || do_exit $?
+if [ "$bundle_type" == "jcef" ] || [ "$bundle_type" == "dcevm" ] || [ "$bundle_type" == "fd" ] || [ "$bundle_type" == "$JBRSDK_BUNDLE" ]; then
+  modules=${modules},$(get_mods_list "$JCEF_PATH"/jmods)
+fi
+create_image_bundle "$JBRSDK_BUNDLE${jbr_name_postfix}" "$JBRSDK_BUNDLE" "$JSDK_MODS_DIR" "$modules" || do_exit $?
+
+if [ -z "$bundle_type" ]; then
+    JBRSDK_TEST=${JBRSDK_BUNDLE}-${JBSDK_VERSION}-osx-test-${architecture}-b${build_number}
+    echo Creating "$JBRSDK_TEST" ...
+    make test-image CONF=$RELEASE_NAME || do_exit $?
+    [ -f "$JBRSDK_TEST.tar.gz" ] && rm "$JBRSDK_TEST.tar.gz"
+    COPYFILE_DISABLE=1 tar -pczf "$JBRSDK_TEST".tar.gz -C $IMAGES_DIR --exclude='test/jdk/demos' test || do_exit $?
+fi
+
+do_exit 0
--- a/jb/project/tools/mac/scripts/notarize.sh
+++ b/jb/project/tools/mac/scripts/notarize.sh
@@ -0,0 +1,120 @@
+#!/bin/bash
+
+APP_DIRECTORY=$1
+APPL_USER=$2
+APPL_PASSWORD=$3
+APP_NAME=$4
+BUNDLE_ID=$5
+FAKE_ROOT="${6:-fake-root}"
+
+if [[ -z "$APP_DIRECTORY" ]] || [[ -z "$APPL_USER" ]] || [[ -z "$APPL_PASSWORD" ]]; then
+  echo "Usage: $0 AppDirectory Username Password"
+  exit 1
+fi
+if [[ ! -d "$APP_DIRECTORY" ]]; then
+  echo "AppDirectory '$APP_DIRECTORY' does not exist or not a directory"
+  exit 1
+fi
+
+function log() {
+  echo "$(date '+[%H:%M:%S]') $*"
+}
+
+function publish-log() {
+  id=$1
+  file=$2
+  curl -T "$file" "$ARTIFACTORY_URL/$id" || true
+}
+
+function altool-upload() {
+  # Since altool uses same file for upload token we have to trick it into using different folders for token file location
+  # Also it copies zip into TMPDIR so we override it too, to simplify cleanup
+  OLD_HOME="$HOME"
+  export HOME="$FAKE_ROOT/home"
+  export TMPDIR="$FAKE_ROOT/tmp"
+  mkdir -p "$HOME"
+  mkdir -p "$TMPDIR"
+  export _JAVA_OPTIONS="-Duser.home=$HOME -Djava.io.tmpdir=$TMPDIR"
+  # Reduce amount of downloads, cache transporter libraries
+  shared_itmstransporter="$OLD_HOME/shared-itmstransporter"
+  if [[ -f "$shared_itmstransporter" ]]; then
+    cp -r "$shared_itmstransporter" "$HOME/.itmstransporter"
+  fi
+  # For some reason altool prints everything to stderr, not stdout
+  set +e
+  xcrun altool --notarize-app \
+    --username "$APPL_USER" --password "$APPL_PASSWORD" \
+    --primary-bundle-id "$BUNDLE_ID" \
+    --asc-provider JetBrainssro --file "$1" 2>&1 | tee "altool.init.out"
+  unset TMPDIR
+  export HOME="$OLD_HOME"
+  set -e
+}
+
+#immediately exit script with an error if a command fails
+set -euo pipefail
+
+file="$APP_NAME.zip"
+
+log "Zipping $file..."
+rm -rf "$file"
+ditto -c -k --sequesterRsrc --keepParent "$APP_DIRECTORY" "$file"
+
+log "Notarizing $file..."
+rm -rf "altool.init.out" "altool.check.out"
+altool-upload "$file"
+
+rm -rf "$file"
+
+notarization_info="$(grep -e "RequestUUID" "altool.init.out" | grep -oE '([0-9a-f-]{36})')"
+
+if [ -z "$notarization_info" ]; then
+  log "Faile to read RequestUUID from altool.init.out"
+  exit 10
+fi
+
+PATH="$PATH:/usr/local/bin/"
+
+log "Notarization request sent, awaiting response"
+spent=0
+
+while true; do
+  # For some reason altool prints everything to stderr, not stdout
+  xcrun altool --username "$APPL_USER" --notarization-info "$notarization_info" --password "$APPL_PASSWORD" >"altool.check.out" 2>&1 || true
+  status="$(grep -oe 'Status: .*' "altool.check.out" | cut -c 9- || true)"
+  log "Current status: $status"
+  if [ "$status" = "invalid" ]; then
+    log "Notarization failed"
+    ec=1
+  elif [ "$status" = "success" ]; then
+    log "Notarization succeeded"
+    ec=0
+  else
+    if [ "$status" != "in progress" ]; then
+      log "Unknown notarization status, waiting more, altool output:"
+      cat "altool.check.out"
+    fi
+    if [[ $spent -gt 60 ]]; then
+      log "Waiting time out (apx 60 minutes)"
+      ec=2
+      break
+    fi
+    sleep 60
+    ((spent += 1))
+    continue
+  fi
+  developer_log="developer_log.json"
+  log "Fetching $developer_log"
+  # TODO: Replace cut with trim or something better
+  url="$(grep -oe 'LogFileURL: .*' "altool.check.out" | cut -c 13-)"
+  wget "$url" -O "$developer_log" && cat "$developer_log" || true
+  if [ $ec != 0 ]; then
+    log "Publishing $developer_log"
+    publish-log "$notarization_info" "$developer_log"
+  fi
+  break
+done
+cat "altool.check.out"
+
+rm -rf "altool.init.out" "altool.check.out"
+exit $ec
--- a/jb/project/tools/mac/scripts/sign.sh
+++ b/jb/project/tools/mac/scripts/sign.sh
@@ -0,0 +1,107 @@
+#!/bin/bash
+
+APP_DIRECTORY=$1
+JB_CERT=$2
+
+if [[ -z "$APP_DIRECTORY" ]] || [[ -z "$JB_CERT" ]]; then
+  echo "Usage: $0 AppDirectory CertificateID"
+  exit 1
+fi
+if [[ ! -d "$APP_DIRECTORY" ]]; then
+  echo "AppDirectory '$APP_DIRECTORY' does not exist or not a directory"
+  exit 1
+fi
+
+function log() {
+  echo "$(date '+[%H:%M:%S]') $*"
+}
+
+#immediately exit script with an error if a command fails
+set -euo pipefail
+
+# Cleanup files left from previous sign attempt (if any)
+find "$APP_DIRECTORY" -name '*.cstemp' -exec rm '{}' \;
+
+log "Signing libraries and executables..."
+# -perm +111 searches for executables
+for f in \
+   "Contents/Home/bin" \
+   "Contents/Home/lib"; do
+  if [ -d "$APP_DIRECTORY/$f" ]; then
+    find "$APP_DIRECTORY/$f" \
+      -type f \( -name "*.jnilib" -o -name "*.dylib" -o -name "*.so" -o -perm +111 \) \
+      -exec codesign --timestamp --force \
+      -v -s "$JB_CERT" --options=runtime \
+      --entitlements entitlements.xml {} \;
+  fi
+done
+
+if [ -d "$APP_DIRECTORY/Contents/Frameworks" ]; then
+  log "Signing frameworks..."
+  for f in $APP_DIRECTORY/Contents/Frameworks/*; do
+    find "$f" \
+      -type f \( -name "*.jnilib" -o -name "*.dylib" -o -name "*.so" \) \
+      -exec codesign --timestamp --force \
+      -v -s "$JB_CERT" \
+      --entitlements entitlements.xml {} \;
+    codesign --timestamp --force \
+      -v -s "$JB_CERT" --options=runtime \
+      --entitlements entitlements.xml "$f"
+  done
+fi
+
+log "Signing libraries in jars in $PWD"
+
+# todo: add set -euo pipefail; into the inner sh -c
+# `-e` prevents `grep -q && printf` loginc
+# with `-o pipefail` there's no input for 'while' loop
+find "$APP_DIRECTORY" -name '*.jar' \
+  -exec sh -c "set -u; unzip -l \"\$0\" | grep -q -e '\.dylib\$' -e '\.jnilib\$' -e '\.so\$' -e '^jattach\$' && printf \"\$0\0\" " {} \; |
+  while IFS= read -r -d $'\0' file; do
+    log "Processing libraries in $file"
+
+    rm -rf jarfolder jar.jar
+    mkdir jarfolder
+    filename="${file##*/}"
+    log "Filename: $filename"
+    cp "$file" jarfolder && (cd jarfolder && jar xf "$filename" && rm "$filename")
+
+    find jarfolder \
+      -type f \( -name "*.jnilib" -o -name "*.dylib" -o -name "*.so" -o -name "jattach" \) \
+      -exec codesign --timestamp --force \
+      -v -s "$JB_CERT" --options=runtime \
+      --entitlements entitlements.xml {} \;
+
+    (cd jarfolder; zip -q -r -o ../jar.jar .)
+    mv jar.jar "$file"
+  done
+
+rm -rf jarfolder jar.jar
+
+log "Signing other files..."
+for f in \
+  "Contents/MacOS"; do
+  if [ -d "$APP_DIRECTORY/$f" ]; then
+    find "$APP_DIRECTORY/$f" \
+      -type f \( -name "*.jnilib" -o -name "*.dylib" -o -name "*.so" -o -perm +111 \) \
+      -exec codesign --timestamp --force \
+      -v -s "$JB_CERT" --options=runtime \
+      --entitlements entitlements.xml {} \;
+  fi
+done
+
+#log "Signing executable..."
+#codesign --timestamp \
+#    -v -s "$JB_CERT" --options=runtime \
+#    --force \
+#    --entitlements entitlements.xml "$APP_DIRECTORY/Contents/MacOS/idea"
+
+log "Signing whole app..."
+codesign --timestamp \
+  -v -s "$JB_CERT" --options=runtime \
+  --force \
+  --entitlements entitlements.xml "$APP_DIRECTORY"
+
+log "Verifying java is not broken"
+find "$APP_DIRECTORY" \
+  -type f -name 'java' -perm +111 -exec {} -version \;
--- a/jb/project/tools/mac/scripts/signapp.sh
+++ b/jb/project/tools/mac/scripts/signapp.sh
@@ -0,0 +1,134 @@
+#!/bin/bash -x
+
+#immediately exit script with an error if a command fails
+set -euo pipefail
+
+export COPY_EXTENDED_ATTRIBUTES_DISABLE=true
+export COPYFILE_DISABLE=true
+
+INPUT_FILE=$1
+EXPLODED=$2.exploded
+BACKUP_JMODS=$2.backup
+USERNAME=$3
+PASSWORD=$4
+CODESIGN_STRING=$5
+NOTARIZE=$6
+BUNDLE_ID=$7
+
+cd "$(dirname "$0")"
+
+function log() {
+  echo "$(date '+[%H:%M:%S]') $*"
+}
+
+log "Deleting $EXPLODED ..."
+if test -d "$EXPLODED"; then
+  find "$EXPLODED" -mindepth 1 -maxdepth 1 -exec chmod -R u+wx '{}' \;
+fi
+rm -rf "$EXPLODED"
+mkdir "$EXPLODED"
+rm -rf "$BACKUP_JMODS"
+mkdir "$BACKUP_JMODS"
+
+log "Unzipping $INPUT_FILE to $EXPLODED ..."
+tar -xzvf "$INPUT_FILE" --directory $EXPLODED
+BUILD_NAME="$(ls "$EXPLODED")"
+sed -i '' s/BNDL/APPL/ $EXPLODED/$BUILD_NAME/Contents/Info.plist
+rm -f $EXPLODED/$BUILD_NAME/Contents/CodeResources
+rm "$INPUT_FILE"
+if test -d $EXPLODED/$BUILD_NAME/Contents/Home/jmods; then
+  mv $EXPLODED/$BUILD_NAME/Contents/Home/jmods $BACKUP_JMODS
+fi
+
+log "$INPUT_FILE extracted and removed"
+
+APPLICATION_PATH="$EXPLODED/$BUILD_NAME"
+
+find "$APPLICATION_PATH/Contents/Home/bin" \
+  -maxdepth 1 -type f -name '*.jnilib' -print0 |
+  while IFS= read -r -d $'\0' file; do
+    if [ -f "$file" ]; then
+      log "Linking $file"
+      b="$(basename "$file" .jnilib)"
+      ln -sf "$b.jnilib" "$(dirname "$file")/$b.dylib"
+    fi
+  done
+
+find "$APPLICATION_PATH/Contents/" \
+  -maxdepth 1 -type f -name '*.txt' -print0 |
+  while IFS= read -r -d $'\0' file; do
+    if [ -f "$file" ]; then
+      log "Moving $file"
+      mv "$file" "$APPLICATION_PATH/Contents/Resources"
+    fi
+  done
+
+non_plist=$(find "$APPLICATION_PATH/Contents/" -maxdepth 1 -type f -and -not -name 'Info.plist' | wc -l)
+if [[ $non_plist -gt 0 ]]; then
+  log "Only Info.plist file is allowed in Contents directory but found $non_plist file(s):"
+  log "$(find "$APPLICATION_PATH/Contents/" -maxdepth 1 -type f -and -not -name 'Info.plist')"
+  exit 1
+fi
+
+log "Unlocking keychain..."
+# Make sure *.p12 is imported into local KeyChain
+security unlock-keychain -p "$PASSWORD" "/Users/$USERNAME/Library/Keychains/login.keychain"
+
+attempt=1
+limit=3
+set +e
+while [[ $attempt -le $limit ]]; do
+  log "Signing (attempt $attempt) $APPLICATION_PATH ..."
+  ./sign.sh "$APPLICATION_PATH" "$CODESIGN_STRING"
+  ec=$?
+  if [[ $ec -ne 0 ]]; then
+    ((attempt += 1))
+    if [ $attempt -eq $limit ]; then
+      set -e
+    fi
+    log "Signing failed, wait for 30 sec and try to sign again"
+    sleep 30
+  else
+    log "Signing done"
+    codesign -v "$APPLICATION_PATH" -vvvvv
+    log "Check sign done"
+    ((attempt += limit))
+  fi
+done
+
+set -e
+
+if [ "$NOTARIZE" = "yes" ]; then
+  log "Notarizing..."
+  # shellcheck disable=SC1090
+  source "$HOME/.notarize_token"
+  APP_NAME=$(echo ${INPUT_FILE} | awk -F"." '{ print $1 }')
+  # Since notarization tool uses same file for upload token we have to trick it into using different folders, hence fake root
+  # Also it leaves copy of zip file in TMPDIR, so notarize.sh overrides it and uses FAKE_ROOT as location for temp TMPDIR
+  FAKE_ROOT="$(pwd)/fake-root"
+  mkdir -p "$FAKE_ROOT"
+  echo "Notarization will use fake root: $FAKE_ROOT"
+  ./notarize.sh "$APPLICATION_PATH" "$APPLE_USERNAME" "$APPLE_PASSWORD" "$APP_NAME" "$BUNDLE_ID" "$FAKE_ROOT"
+  rm -rf "$FAKE_ROOT"
+
+  set +e
+  log "Stapling..."
+  xcrun stapler staple "$APPLICATION_PATH"
+else
+  log "Notarization disabled"
+  log "Stapling disabled"
+fi
+
+log "Zipping $BUILD_NAME to $INPUT_FILE ..."
+(
+  #cd "$EXPLODED"
+  #ditto -c -k --sequesterRsrc --keepParent "$BUILD_NAME" "../$INPUT_FILE"
+  if test -d $BACKUP_JMODS/jmods; then
+    mv $BACKUP_JMODS/jmods $EXPLODED/$BUILD_NAME/Contents/Home
+  fi
+
+  tar -pczvf $INPUT_FILE --exclude='*.dSYM' --exclude='man' -C $EXPLODED $BUILD_NAME
+  log "Finished zipping"
+)
+rm -rf "$EXPLODED"
+log "Done"
--- a/jb/project/tools/mkjbrapi.sh
+++ b/jb/project/tools/mkjbrapi.sh
@@ -0,0 +1,56 @@
+#!/bin/bash -x
+
+# How to call this script:
+# eval $(jb/project/tools/mkjbrapi.sh)
+
+# It is used to build jetbrains.api module
+# After properly calling this script, you can use following variables:
+# JBR_API_JAR - absolute path to resulting JAR
+# JBR_API_SOURCES_JAR - absolute path to JAR with sources
+# JBR_API_VERSION - JBR API version in form <major>.<minor>
+# JBR_API_VERSION_MAJOR, JBR_API_VERSION_MINOR - JBR API version components
+# JBR_BUILD_DIR - absolute path to JBR build directory
+# JBR_BOOT_JDK - absolute path to used boot JDK
+
+ROOT=$(pwd)
+
+sh configure --with-debug-level=release --disable-warnings-as-errors 1>&2 || exit $?
+
+# Get boot JDK & build directory using make script
+make -f $ROOT/make/JBRApi.gmk -I $ROOT jbr-api MAKEOVERRIDES= CONF=release OUT="$ROOT/build/jbr-api.cfg" 1>&2 || exit $?
+source "$ROOT/build/jbr-api.cfg" || exit $?
+
+# Build module
+make jetbrains.api 1>&2 || exit $?
+
+# Get JBR API version from compiled class
+JSHELL_COMMAND='
+System.out.println("\nVERSION_MAJOR=" + com.jetbrains.JBRApi.getMajorVersion());
+System.out.println("\nVERSION_MINOR=" + com.jetbrains.JBRApi.getMinorVersion());
+/exit'
+VERSION_VARIABLES=$("$BOOT_JDK/bin/jshell" -s --module-path "$BUILD_DIR/jdk/modules/jetbrains.api" \
+--add-modules jetbrains.api <<< "$JSHELL_COMMAND" | grep "^VERSION\|^|") || exit $?
+eval "$VERSION_VARIABLES" || exit $?
+
+# Create JAR
+(
+  cd "$BUILD_DIR/jdk/modules/jetbrains.api"
+  "$BOOT_JDK/bin/jar" -cf "$BUILD_DIR/jbr-api.jar" * 1>&2
+) || exit $?
+
+# Create source JAR
+(
+  cd "src/jetbrains.api/share/classes"
+  "$BOOT_JDK/bin/jar" -cf "$BUILD_DIR/jbr-api-sources.jar" * 1>&2
+) || exit $?
+
+# Print output values
+echo "JBR_API_JAR=$BUILD_DIR/jbr-api.jar"
+echo "JBR_API_SOURCES_JAR=$BUILD_DIR/jbr-api-sources.jar"
+echo "JBR_API_VERSION=$VERSION_MAJOR.$VERSION_MINOR"
+echo "JBR_API_VERSION_MAJOR=$VERSION_MAJOR"
+echo "JBR_API_VERSION_MINOR=$VERSION_MINOR"
+echo "JBR_BUILD_DIR=$BUILD_DIR"
+echo "JBR_BOOT_JDK=$BOOT_JDK"
+
+echo "Success!" 1>&2
--- a/jb/project/tools/patches/add_jcef_module.patch
+++ b/jb/project/tools/patches/add_jcef_module.patch
@@ -0,0 +1,30 @@
+diff --git modules.list modules.list
+index dcf610a6a56..f8797505c23 100644
+--- modules.list
+++ modules.list
+@@ -51,4 +51,7 @@ jdk.zipfs,
+ jdk.hotspot.agent,
+ jetbrains.api,
+ jetbrains.api.impl,
+-jdk.jcmd
+jdk.jcmd,
+jcef,
+gluegen.rt,
+jogl.all
+diff --git src/java.desktop/share/classes/module-info.java src/java.desktop/share/classes/module-info.java
+index 897647ee368..781d1809493 100644
+--- src/java.desktop/share/classes/module-info.java
+++ src/java.desktop/share/classes/module-info.java
+@@ -116,7 +116,11 @@ module java.desktop {
+     // see make/GensrcModuleInfo.gmk
+     exports sun.awt to
+         jdk.accessibility,
+-        jdk.unsupported.desktop;
+        jdk.unsupported.desktop,
+        jcef,
+        jogl.all;
+
+    exports java.awt.peer to jcef;
+ 
+     exports java.awt.dnd.peer to jdk.unsupported.desktop;
+     exports sun.awt.dnd to jdk.unsupported.desktop;
--- a/jb/project/tools/patches/dcevm/0001-Apply-basic-dcevm11-patch.patch
+++ b/jb/project/tools/patches/dcevm/0001-Apply-basic-dcevm11-patch.patch
--- a/jb/project/tools/patches/dcevm/0002-dcevm11-fixes.patch
+++ b/jb/project/tools/patches/dcevm/0002-dcevm11-fixes.patch
--- a/jb/project/tools/patches/dcevm/0003-Fix-class-cast-exception-on-redefinition-of-class-A-.patch
+++ b/jb/project/tools/patches/dcevm/0003-Fix-class-cast-exception-on-redefinition-of-class-A-.patch
@@ -0,0 +1,29 @@
+From 960dafbeeba190911955c208b611fecc15d66738 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Wed, 11 Mar 2020 14:19:34 +0100
+Subject: [PATCH 03/34] Fix class cast exception on redefinition of class A,
+ that is superclass of B that has anonymous class C
+
+---
+ src/hotspot/share/oops/instanceKlass.cpp | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/oops/instanceKlass.cpp b/src/hotspot/share/oops/instanceKlass.cpp
+index 994fc8a3bc8..3be3a09ef8f 100644
+--- a/src/hotspot/share/oops/instanceKlass.cpp
+++ b/src/hotspot/share/oops/instanceKlass.cpp
+@@ -953,7 +953,10 @@ bool InstanceKlass::link_class_impl(TRAPS) {
+ 
+     if (!is_linked()) {
+       if (!is_rewritten()) {
+-        {
+        // (DCEVM): If class A is being redefined and class B->A (B is extended from A) and B is host class of anonymous class C
+        // then second redefinition fails with cannot cast klass exception. So we currently turn off bytecode verification
+        // on redefinition.
+        if (!AllowEnhancedClassRedefinition || !newest_version()->is_redefining()) {
+           bool verify_ok = verify_code(THREAD);
+           if (!verify_ok) {
+             return false;
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0004-HotswapAgent-integration.patch
+++ b/jb/project/tools/patches/dcevm/0004-HotswapAgent-integration.patch
--- a/jb/project/tools/patches/dcevm/0005-Support-for-Lambda-class-redefinition.patch
+++ b/jb/project/tools/patches/dcevm/0005-Support-for-Lambda-class-redefinition.patch
@@ -0,0 +1,240 @@
+From 39df5f163d4a0f1fd6b92313a5570808f19d5e20 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 4 Oct 2020 21:12:12 +0200
+Subject: [PATCH 05/34] Support for Lambda class redefinition
+
+---
+ .../share/classfile/classLoaderData.cpp       |  9 +++
+ .../share/classfile/classLoaderData.hpp       |  2 +-
+ .../share/classfile/systemDictionary.cpp      | 12 +++-
+ .../share/classfile/systemDictionary.hpp      |  1 +
+ .../prims/jvmtiEnhancedRedefineClasses.cpp    | 65 +++++++++++++++++--
+ .../prims/jvmtiEnhancedRedefineClasses.hpp    |  1 +
+ .../share/prims/resolvedMethodTable.cpp       |  2 +
+ src/hotspot/share/prims/unsafe.cpp            |  1 +
+ 8 files changed, 83 insertions(+), 10 deletions(-)
+
+diff --git a/src/hotspot/share/classfile/classLoaderData.cpp b/src/hotspot/share/classfile/classLoaderData.cpp
+index 0cd90bb8c27..4d64c6b454a 100644
+--- a/src/hotspot/share/classfile/classLoaderData.cpp
+++ b/src/hotspot/share/classfile/classLoaderData.cpp
+@@ -593,6 +593,15 @@ Dictionary* ClassLoaderData::create_dictionary() {
+   return new Dictionary(this, size, resizable);
+ }
+ 
+void ClassLoaderData::exchange_holders(ClassLoaderData* cld) {
+  oop holder_oop = _holder.peek();
+  _holder.replace(cld->_holder.peek());
+  cld->_holder.replace(holder_oop);
+  WeakHandle<vm_class_loader_data> exchange = _holder;
+  _holder = cld->_holder;
+  cld->_holder = exchange;
+}
+
+ // Tell the GC to keep this klass alive while iterating ClassLoaderDataGraph
+ oop ClassLoaderData::holder_phantom() const {
+   // A klass that was previously considered dead can be looked up in the
+diff --git a/src/hotspot/share/classfile/classLoaderData.hpp b/src/hotspot/share/classfile/classLoaderData.hpp
+index ba2393f8dd0..e2ae0a77351 100644
+--- a/src/hotspot/share/classfile/classLoaderData.hpp
+++ b/src/hotspot/share/classfile/classLoaderData.hpp
+@@ -181,7 +181,7 @@ class ClassLoaderData : public CHeapObj<mtClass> {
+   bool has_accumulated_modified_oops()   { return _accumulated_modified_oops; }
+   oop holder_no_keepalive() const;
+   oop holder_phantom() const;
+-
+  void exchange_holders(ClassLoaderData* cld);
+  private:
+   void unload();
+   bool keep_alive() const       { return _keep_alive > 0; }
+diff --git a/src/hotspot/share/classfile/systemDictionary.cpp b/src/hotspot/share/classfile/systemDictionary.cpp
+index bd0cae7cb9b..8f2b46add4d 100644
+--- a/src/hotspot/share/classfile/systemDictionary.cpp
+++ b/src/hotspot/share/classfile/systemDictionary.cpp
+@@ -1062,10 +1062,14 @@ InstanceKlass* SystemDictionary::parse_stream(Symbol* class_name,
+                                               Handle class_loader,
+                                               ClassFileStream* st,
+                                               const ClassLoadInfo& cl_info,
+                                              InstanceKlass* old_klass,
+                                               TRAPS) {
+ 
+   EventClassLoad class_load_start_event;
+   ClassLoaderData* loader_data;
+  
+  bool is_redefining = (old_klass != NULL);
+  
+   bool is_unsafe_anon_class = cl_info.unsafe_anonymous_host() != NULL;
+ 
+   // - for unsafe anonymous class: create a new CLD whith a class holder that uses
+@@ -1094,8 +1098,12 @@ InstanceKlass* SystemDictionary::parse_stream(Symbol* class_name,
+                                                       class_name,
+                                                       loader_data,
+                                                       cl_info,
+-                                                      false, // pick_newest
+                                                      is_redefining, // pick_newest
+                                                       CHECK_NULL);
+  if (is_redefining && k != NULL) {
+    k->set_redefining(true);
+    k->set_old_version(old_klass);
+  }
+ 
+   if ((cl_info.is_hidden() || is_unsafe_anon_class) && k != NULL) {
+     // Hidden classes that are not strong and unsafe anonymous classes must update
+@@ -1998,7 +2006,7 @@ void SystemDictionary::remove_from_hierarchy(InstanceKlass* k) {
+   k->remove_from_sibling_list();
+ }
+ 
+-// (DCEVM) 
+// (DCEVM)
+ void SystemDictionary::update_constraints_after_redefinition() {
+   constraints()->update_after_redefinition();
+ }
+diff --git a/src/hotspot/share/classfile/systemDictionary.hpp b/src/hotspot/share/classfile/systemDictionary.hpp
+index 4547449dbec..931e655d631 100644
+--- a/src/hotspot/share/classfile/systemDictionary.hpp
+++ b/src/hotspot/share/classfile/systemDictionary.hpp
+@@ -329,6 +329,7 @@ public:
+                                      Handle class_loader,
+                                      ClassFileStream* st,
+                                      const ClassLoadInfo& cl_info,
+                                     InstanceKlass* old_klass,
+                                      TRAPS);
+ 
+   // Resolve from stream (called by jni_DefineClass and JVM_DefineClass)
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index 92ce6c27b8a..8b765623dcd 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -494,6 +494,8 @@ void VM_EnhancedRedefineClasses::doit() {
+     ClassLoaderDataGraph::classes_do(&clear_cpool_cache);
+ 
+ 
+    // SystemDictionary::methods_do(fix_invoke_method);
+
+   // JSR-292 support
+   if (_any_class_has_resolved_methods) {
+     bool trace_name_printed = false;
+@@ -756,12 +758,34 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
+     // load hook event.
+     state->set_class_being_redefined(the_class, _class_load_kind);
+ 
+-    InstanceKlass* k = SystemDictionary::resolve_from_stream(the_class_sym,
+-                                                the_class_loader,
+-                                                protection_domain,
+-                                                &st,
+-                                                the_class,
+-                                                THREAD);
+    InstanceKlass* k;
+
+    if (InstanceKlass::cast(the_class)->is_anonymous()) {
+      const InstanceKlass* host_class = the_class->host_klass();
+
+      // Make sure it's the real host class, not another anonymous class.
+      while (host_class != NULL && host_class->is_anonymous()) {
+        host_class = host_class->host_klass();
+      }
+
+      k = SystemDictionary::parse_stream(the_class_sym,
+                                         the_class_loader,
+                                         protection_domain,
+                                         &st,
+                                         host_class,
+                                         the_class,
+                                         NULL,
+                                         THREAD);
+      k->class_loader_data()->exchange_holders(the_class->class_loader_data());
+      the_class->class_loader_data()->inc_keep_alive();
+    } else {
+      k = SystemDictionary::resolve_from_stream(the_class_sym,
+                                                  the_class_loader,
+                                                  protection_domain,
+                                                  &st,
+                                                  the_class,
+                                                  THREAD);
+    }
+     // Clear class_being_redefined just to be sure.
+     state->clear_class_being_redefined();
+ 
+@@ -1442,6 +1466,30 @@ void VM_EnhancedRedefineClasses::MethodDataCleaner::do_klass(Klass* k) {
+   }
+ }
+ 
+void VM_EnhancedRedefineClasses::fix_invoke_method(Method* method) {
+
+  constantPoolHandle other_cp = constantPoolHandle(method->constants());
+
+  for (int i = 0; i < other_cp->length(); i++) {
+    if (other_cp->tag_at(i).is_klass()) {
+      Klass* klass = other_cp->resolved_klass_at(i);
+      if (klass->new_version() != NULL) {
+        // Constant pool entry points to redefined class -- update to the new version
+        other_cp->klass_at_put(i, klass->newest_version());
+      }
+      assert(other_cp->resolved_klass_at(i)->new_version() == NULL, "Must be new klass!");
+    }
+  }
+
+  ConstantPoolCache* cp_cache = other_cp->cache();
+  if (cp_cache != NULL) {
+    cp_cache->clear_entries();
+  }
+
+}
+
+
+
+ void VM_EnhancedRedefineClasses::update_jmethod_ids() {
+   for (int j = 0; j < _matching_methods_length; ++j) {
+     Method* old_method = _matching_old_methods[j];
+@@ -1979,7 +2027,10 @@ jvmtiError VM_EnhancedRedefineClasses::find_sorted_affected_classes(TRAPS) {
+   // Find classes not directly redefined, but affected by a redefinition (because one of its supertypes is redefined)
+   AffectedKlassClosure closure(_affected_klasses);
+   // Updated in j10, from original SystemDictionary::classes_do
+-  ClassLoaderDataGraph::dictionary_classes_do(&closure);
+
+  ClassLoaderDataGraph::classes_do(&closure);
+  //ClassLoaderDataGraph::dictionary_classes_do(&closure);
+
+   log_trace(redefine, class, load)("%d classes affected", _affected_klasses->length());
+ 
+   // Sort the affected klasses such that a supertype is always on a smaller array index than its subtype.
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+index 60b62c3170a..d8a11b51fe9 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+@@ -116,6 +116,7 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+   void rollback();
+   static void mark_as_scavengable(nmethod* nm);
+   static void unpatch_bytecode(Method* method);
+  static void fix_invoke_method(Method* method);
+ 
+   // Figure out which new methods match old methods in name and signature,
+   // which methods have been added, and which are no longer present
+diff --git a/src/hotspot/share/prims/resolvedMethodTable.cpp b/src/hotspot/share/prims/resolvedMethodTable.cpp
+index 122bb8c186b..81b3aa96564 100644
+--- a/src/hotspot/share/prims/resolvedMethodTable.cpp
+++ b/src/hotspot/share/prims/resolvedMethodTable.cpp
+@@ -414,6 +414,8 @@ void ResolvedMethodTable::adjust_method_entries_dcevm(bool * trace_name_printed)
+         InstanceKlass* newer_klass = InstanceKlass::cast(old_method->method_holder()->new_version());
+         Method* newer_method = newer_klass->method_with_idnum(old_method->orig_method_idnum());
+ 
+        log_info(redefine, class, load, exceptions)("Adjusting method: '%s' of new class %s", newer_method->name_and_sig_as_C_string(), newer_klass->name()->as_C_string());
+
+         assert(newer_klass == newer_method->method_holder(), "call after swapping redefined guts");
+         assert(newer_method != NULL, "method_with_idnum() should not be NULL");
+         assert(old_method != newer_method, "sanity check");
+diff --git a/src/hotspot/share/prims/unsafe.cpp b/src/hotspot/share/prims/unsafe.cpp
+index 72d81ec9d6c..027afa3fabd 100644
+--- a/src/hotspot/share/prims/unsafe.cpp
+++ b/src/hotspot/share/prims/unsafe.cpp
+@@ -865,6 +865,7 @@ Unsafe_DefineAnonymousClass_impl(JNIEnv *env,
+                                                 host_loader,
+                                                 &st,
+                                                 cl_info,
+                                                NULL,
+                                                 CHECK_NULL);
+   if (anonk == NULL) {
+     return NULL;
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0006-Fix-no-original-bytecode-found-error-if-method-with-.patch
+++ b/jb/project/tools/patches/dcevm/0006-Fix-no-original-bytecode-found-error-if-method-with-.patch
@@ -0,0 +1,135 @@
+From 5af1daedc86b5fec0f222cbdda3afbdf518985ea Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sat, 23 May 2020 10:02:15 +0200
+Subject: [PATCH 06/34] Fix "no original bytecode found" error if method with
+ bkp is missing
+
+Sometimes IDE can deploy class with erroneous method, such method has
+n bytecode, but breakpoint position can still exist.
+---
+ src/hotspot/share/interpreter/bytecodes.cpp    |  2 +-
+ .../share/interpreter/interpreterRuntime.cpp   |  2 +-
+ src/hotspot/share/oops/method.cpp              |  8 ++++----
+ src/hotspot/share/oops/method.hpp              |  4 ++--
+ .../prims/jvmtiEnhancedRedefineClasses.cpp     | 18 ++++++++++--------
+ 5 files changed, 18 insertions(+), 16 deletions(-)
+
+diff --git a/src/hotspot/share/interpreter/bytecodes.cpp b/src/hotspot/share/interpreter/bytecodes.cpp
+index e377e36b88c..262ecc021b2 100644
+--- a/src/hotspot/share/interpreter/bytecodes.cpp
+++ b/src/hotspot/share/interpreter/bytecodes.cpp
+@@ -84,7 +84,7 @@ Bytecodes::Code Bytecodes::code_at(Method* method, int bci) {
+ Bytecodes::Code Bytecodes::non_breakpoint_code_at(const Method* method, address bcp) {
+   assert(method != NULL, "must have the method for breakpoint conversion");
+   assert(method->contains(bcp), "must be valid bcp in method");
+-  return method->orig_bytecode_at(method->bci_from(bcp));
+  return method->orig_bytecode_at(method->bci_from(bcp), false);
+ }
+ 
+ int Bytecodes::special_length_at(Bytecodes::Code code, address bcp, address end) {
+diff --git a/src/hotspot/share/interpreter/interpreterRuntime.cpp b/src/hotspot/share/interpreter/interpreterRuntime.cpp
+index ed3cc3eb6a2..504e59caf51 100644
+--- a/src/hotspot/share/interpreter/interpreterRuntime.cpp
+++ b/src/hotspot/share/interpreter/interpreterRuntime.cpp
+@@ -814,7 +814,7 @@ JRT_END
+ // Invokes
+ 
+ JRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp))
+-  return method->orig_bytecode_at(method->bci_from(bcp));
+  return method->orig_bytecode_at(method->bci_from(bcp), false);
+ JRT_END
+ 
+ JRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code))
+diff --git a/src/hotspot/share/oops/method.cpp b/src/hotspot/share/oops/method.cpp
+index 516f2bb8f2f..1c88511a5fc 100644
+--- a/src/hotspot/share/oops/method.cpp
+++ b/src/hotspot/share/oops/method.cpp
+@@ -1853,14 +1853,14 @@ bool CompressedLineNumberReadStream::read_pair() {
+ 
+ #if INCLUDE_JVMTI
+ 
+-Bytecodes::Code Method::orig_bytecode_at(int bci) const {
+Bytecodes::Code Method::orig_bytecode_at(int bci, bool no_fatal) const {
+   BreakpointInfo* bp = method_holder()->breakpoints();
+   for (; bp != NULL; bp = bp->next()) {
+     if (bp->match(this, bci)) {
+       return bp->orig_bytecode();
+     }
+   }
+-  {
+  if (!no_fatal) {
+     ResourceMark rm;
+     fatal("no original bytecode found in %s at bci %d", name_and_sig_as_C_string(), bci);
+   }
+@@ -2006,7 +2006,7 @@ BreakpointInfo::BreakpointInfo(Method* m, int bci) {
+   _signature_index = m->signature_index();
+   _orig_bytecode = (Bytecodes::Code) *m->bcp_from(_bci);
+   if (_orig_bytecode == Bytecodes::_breakpoint)
+-    _orig_bytecode = m->orig_bytecode_at(_bci);
+    _orig_bytecode = m->orig_bytecode_at(_bci, false);
+   _next = NULL;
+ }
+ 
+@@ -2015,7 +2015,7 @@ void BreakpointInfo::set(Method* method) {
+   {
+     Bytecodes::Code code = (Bytecodes::Code) *method->bcp_from(_bci);
+     if (code == Bytecodes::_breakpoint)
+-      code = method->orig_bytecode_at(_bci);
+      code = method->orig_bytecode_at(_bci, false);
+     assert(orig_bytecode() == code, "original bytecode must be the same");
+   }
+ #endif
+diff --git a/src/hotspot/share/oops/method.hpp b/src/hotspot/share/oops/method.hpp
+index 83ed2d9c3c1..4d4cc6dc012 100644
+--- a/src/hotspot/share/oops/method.hpp
+++ b/src/hotspot/share/oops/method.hpp
+@@ -230,7 +230,7 @@ class Method : public Metadata {
+ 
+   // JVMTI breakpoints
+ #if !INCLUDE_JVMTI
+-  Bytecodes::Code orig_bytecode_at(int bci) const {
+  Bytecodes::Code orig_bytecode_at(int bci, bool no_fatal) const {
+     ShouldNotReachHere();
+     return Bytecodes::_shouldnotreachhere;
+   }
+@@ -239,7 +239,7 @@ class Method : public Metadata {
+   };
+   u2   number_of_breakpoints() const {return 0;}
+ #else // !INCLUDE_JVMTI
+-  Bytecodes::Code orig_bytecode_at(int bci) const;
+  Bytecodes::Code orig_bytecode_at(int bci, bool no_fatal) const;
+   void set_orig_bytecode_at(int bci, Bytecodes::Code code);
+   void set_breakpoint(int bci);
+   void clear_breakpoint(int bci);
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index 8b765623dcd..a859b8e1162 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -1362,14 +1362,16 @@ void VM_EnhancedRedefineClasses::unpatch_bytecode(Method* method) {
+ 
+     if (code == Bytecodes::_breakpoint) {
+       int bci = method->bci_from(bcp);
+-      code = method->orig_bytecode_at(bci);
+-      java_code = Bytecodes::java_code(code);
+-      if (code != java_code &&
+-           (java_code == Bytecodes::_getfield ||
+-            java_code == Bytecodes::_putfield ||
+-            java_code == Bytecodes::_aload_0)) {
+-        // Let breakpoint table handling unpatch bytecode
+-        method->set_orig_bytecode_at(bci, java_code);
+      code = method->orig_bytecode_at(bci, true);
+      if (code != Bytecodes::_shouldnotreachhere) {
+        java_code = Bytecodes::java_code(code);
+        if (code != java_code &&
+             (java_code == Bytecodes::_getfield ||
+              java_code == Bytecodes::_putfield ||
+              java_code == Bytecodes::_aload_0)) {
+          // Let breakpoint table handling unpatch bytecode
+          method->set_orig_bytecode_at(bci, java_code);
+        }
+       }
+     } else {
+       java_code = Bytecodes::java_code(code);
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0007-Replace-deleted-method-with-Universe-throw_no_such_m.patch
+++ b/jb/project/tools/patches/dcevm/0007-Replace-deleted-method-with-Universe-throw_no_such_m.patch
@@ -0,0 +1,57 @@
+From 19d2274a5dff6e6b31474252b45e5e7484f0180b Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 24 May 2020 12:07:42 +0200
+Subject: [PATCH 07/34] Replace deleted method with
+ Universe::throw_no_such_method_error
+
+---
+ .../share/prims/resolvedMethodTable.cpp       | 28 +++++++++----------
+ 1 file changed, 14 insertions(+), 14 deletions(-)
+
+diff --git a/src/hotspot/share/prims/resolvedMethodTable.cpp b/src/hotspot/share/prims/resolvedMethodTable.cpp
+index 81b3aa96564..caf03ffe56d 100644
+--- a/src/hotspot/share/prims/resolvedMethodTable.cpp
+++ b/src/hotspot/share/prims/resolvedMethodTable.cpp
+@@ -404,25 +404,25 @@ void ResolvedMethodTable::adjust_method_entries_dcevm(bool * trace_name_printed)
+ 
+       if (old_method->is_old()) {
+ 
+        InstanceKlass* newer_klass = InstanceKlass::cast(old_method->method_holder()->new_version());
+        Method* newer_method;
+
+         // Method* new_method;
+         if (old_method->is_deleted()) {
+-          // FIXME:(DCEVM) - check if exception can be thrown
+-          // new_method = Universe::throw_no_such_method_error();
+-          continue;
+-        }
+-
+-        InstanceKlass* newer_klass = InstanceKlass::cast(old_method->method_holder()->new_version());
+-        Method* newer_method = newer_klass->method_with_idnum(old_method->orig_method_idnum());
+          newer_method = Universe::throw_no_such_method_error();
+        } else {
+          newer_method = newer_klass->method_with_idnum(old_method->orig_method_idnum());
+ 
+-        log_info(redefine, class, load, exceptions)("Adjusting method: '%s' of new class %s", newer_method->name_and_sig_as_C_string(), newer_klass->name()->as_C_string());
+          log_info(redefine, class, load, exceptions)("Adjusting method: '%s' of new class %s", newer_method->name_and_sig_as_C_string(), newer_klass->name()->as_C_string());
+ 
+-        assert(newer_klass == newer_method->method_holder(), "call after swapping redefined guts");
+-        assert(newer_method != NULL, "method_with_idnum() should not be NULL");
+-        assert(old_method != newer_method, "sanity check");
+          assert(newer_klass == newer_method->method_holder(), "call after swapping redefined guts");
+          assert(newer_method != NULL, "method_with_idnum() should not be NULL");
+          assert(old_method != newer_method, "sanity check");
+ 
+-        if (_the_table->lookup(newer_method) != NULL) {
+-          // old method was already adjusted if new method exists in _the_table
+-            continue;
+          if (_the_table->lookup(newer_method) != NULL) {
+            // old method was already adjusted if new method exists in _the_table
+              continue;
+          }
+         }
+ 
+         java_lang_invoke_ResolvedMethodName::set_vmtarget(mem_name, newer_method);
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0008-Support-for-G1-gc.patch
+++ b/jb/project/tools/patches/dcevm/0008-Support-for-G1-gc.patch
--- a/jb/project/tools/patches/dcevm/0009-Change-log-level-in-advanced-redefinition.patch
+++ b/jb/project/tools/patches/dcevm/0009-Change-log-level-in-advanced-redefinition.patch
@@ -0,0 +1,50 @@
+From ca47ab5a0a6ce8e2644736f323a335a957311af9 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sat, 13 Jun 2020 18:50:59 +0200
+Subject: [PATCH 09/34] Change log level in advanced redefinition
+
+- Change log level for "Comparing different class ver.." to debug
+- Fix adjust_method_entries_dcevm logging levels and severity
+---
+ src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp | 2 +-
+ src/hotspot/share/prims/resolvedMethodTable.cpp          | 4 ++--
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index 6c9eb40ecf5..b09ba554e07 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -916,7 +916,7 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
+  // Calculated the difference between new and old class  (field change, method change, supertype change, ...).
+ int VM_EnhancedRedefineClasses::calculate_redefinition_flags(InstanceKlass* new_class) {
+   int result = Klass::NoRedefinition;
+-  log_info(redefine, class, load)("Comparing different class versions of class %s",new_class->name()->as_C_string());
+  log_debug(redefine, class, load)("Comparing different class versions of class %s",new_class->name()->as_C_string());
+ 
+   assert(new_class->old_version() != NULL, "must have old version");
+   InstanceKlass* the_class = InstanceKlass::cast(new_class->old_version());
+diff --git a/src/hotspot/share/prims/resolvedMethodTable.cpp b/src/hotspot/share/prims/resolvedMethodTable.cpp
+index caf03ffe56d..eb9fcda44f3 100644
+--- a/src/hotspot/share/prims/resolvedMethodTable.cpp
+++ b/src/hotspot/share/prims/resolvedMethodTable.cpp
+@@ -413,7 +413,7 @@ void ResolvedMethodTable::adjust_method_entries_dcevm(bool * trace_name_printed)
+         } else {
+           newer_method = newer_klass->method_with_idnum(old_method->orig_method_idnum());
+ 
+-          log_info(redefine, class, load, exceptions)("Adjusting method: '%s' of new class %s", newer_method->name_and_sig_as_C_string(), newer_klass->name()->as_C_string());
+          log_debug(redefine, class, update)("Adjusting method: '%s' of new class %s", newer_method->name_and_sig_as_C_string(), newer_klass->name()->as_C_string());
+ 
+           assert(newer_klass == newer_method->method_holder(), "call after swapping redefined guts");
+           assert(newer_method != NULL, "method_with_idnum() should not be NULL");
+@@ -433,7 +433,7 @@ void ResolvedMethodTable::adjust_method_entries_dcevm(bool * trace_name_printed)
+ 
+         ResourceMark rm;
+         if (!(*trace_name_printed)) {
+-          log_info(redefine, class, update)("adjust: name=%s", old_method->method_holder()->external_name());
+          log_debug(redefine, class, update)("adjust: name=%s", old_method->method_holder()->external_name());
+            *trace_name_printed = true;
+         }
+         log_debug(redefine, class, update, constantpool)
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0010-AllowEnhancedClassRedefinition-is-false-disabled-by-.patch
+++ b/jb/project/tools/patches/dcevm/0010-AllowEnhancedClassRedefinition-is-false-disabled-by-.patch
@@ -0,0 +1,26 @@
+From 7e236beee0375656d1955fc1168143c1639fb7f1 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Tue, 6 Oct 2020 22:15:31 +0200
+Subject: [PATCH 10/34] AllowEnhancedClassRedefinition is false (disabled) by
+ default
+
+---
+ src/hotspot/share/runtime/globals.hpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/runtime/globals.hpp b/src/hotspot/share/runtime/globals.hpp
+index 5b367704800..2710c6ea0e5 100644
+--- a/src/hotspot/share/runtime/globals.hpp
+++ b/src/hotspot/share/runtime/globals.hpp
+@@ -2466,7 +2466,7 @@ const size_t minimumSymbolTableSize = 1024;
+   diagnostic(bool, DeoptimizeNMethodBarriersALot, false,                    \
+                 "Make nmethod barriers deoptimise a lot.")                  \
+                                                                             \
+-  product(bool, AllowEnhancedClassRedefinition, true,                       \
+  product(bool, AllowEnhancedClassRedefinition, false,                      \
+              "Allow enhanced class redefinition beyond swapping method "    \
+              "bodies")                                                      \
+                                                                             \
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0011-add-jvmtiEnhancedRedefineClasses.-to-CMakeLists.txt.patch
+++ b/jb/project/tools/patches/dcevm/0011-add-jvmtiEnhancedRedefineClasses.-to-CMakeLists.txt.patch
--- a/jb/project/tools/patches/dcevm/0012-Set-HOTSPOT_VM_DISTRO-Dynamic-Code-Evolution.patch
+++ b/jb/project/tools/patches/dcevm/0012-Set-HOTSPOT_VM_DISTRO-Dynamic-Code-Evolution.patch
@@ -0,0 +1,25 @@
+From d56e73885111b386771f564ec6beb305338993df Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Mon, 19 Oct 2020 20:00:04 +0200
+Subject: [PATCH 12/34] Set HOTSPOT_VM_DISTRO=Dynamic Code Evolution
+
+---
+ make/autoconf/version-numbers | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/make/autoconf/version-numbers b/make/autoconf/version-numbers
+index aabdc5bed20..df8025a2e84 100644
+--- a/make/autoconf/version-numbers
+++ b/make/autoconf/version-numbers
+@@ -45,7 +45,7 @@ PRODUCT_NAME=OpenJDK
+ PRODUCT_SUFFIX="Runtime Environment"
+ JDK_RC_PLATFORM_NAME=Platform
+ COMPANY_NAME=N/A
+-HOTSPOT_VM_DISTRO="OpenJDK"
+HOTSPOT_VM_DISTRO="Dynamic Code Evolution"
+ VENDOR_URL=https://openjdk.java.net/
+ VENDOR_URL_BUG=https://bugreport.java.com/bugreport/
+ VENDOR_URL_VM_BUG=https://bugreport.java.com/bugreport/crash.jsp
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0013-Fix-G1-nmethod-registration.patch
+++ b/jb/project/tools/patches/dcevm/0013-Fix-G1-nmethod-registration.patch
@@ -0,0 +1,71 @@
+From 7ebad43ed45805b0a3736c510f708ff17697ba7e Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 11 Oct 2020 10:43:28 +0200
+Subject: [PATCH 13/34] Fix G1 nmethod registration
+
+---
+ .../prims/jvmtiEnhancedRedefineClasses.cpp    | 19 ++++++++++++++++---
+ .../prims/jvmtiEnhancedRedefineClasses.hpp    |  3 ++-
+ 2 files changed, 18 insertions(+), 4 deletions(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index b09ba554e07..718426f2819 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -216,7 +216,14 @@ void VM_EnhancedRedefineClasses::mark_as_scavengable(nmethod* nm) {
+   }
+ }
+ 
+-void VM_EnhancedRedefineClasses::mark_as_scavengable_g1(nmethod* nm) {
+void VM_EnhancedRedefineClasses::unregister_nmethod_g1(nmethod* nm) {
+  // It should work not only for G1 but also for another GCs, but this way is safer now
+  if (!nm->is_zombie() && !nm->is_unloaded()) {
+    Universe::heap()->unregister_nmethod(nm);
+  }
+}
+
+void VM_EnhancedRedefineClasses::register_nmethod_g1(nmethod* nm) {
+   // It should work not only for G1 but also for another GCs, but this way is safer now
+   if (!nm->is_zombie() && !nm->is_unloaded()) {
+     Universe::heap()->register_nmethod(nm);
+@@ -521,8 +528,9 @@ void VM_EnhancedRedefineClasses::doit() {
+     // For now, mark all nmethod's as scavengable that are not scavengable already
+     if (ScavengeRootsInCode) {
+       if (UseG1GC) {
+-        // this should work also for other GCs
+-        CodeCache::nmethods_do(mark_as_scavengable_g1);
+        // G1 holds references to nmethods in regions based on oops values. Since oops in nmethod can be changed in ChangePointers* closures
+        // we unregister nmethods from G1 heap, then closures are processed (oops are changed) and finally we register nmethod to G1 again
+        CodeCache::nmethods_do(unregister_nmethod_g1);
+       } else {
+         CodeCache::nmethods_do(mark_as_scavengable);
+       }
+@@ -545,6 +553,11 @@ void VM_EnhancedRedefineClasses::doit() {
+ 
+     Universe::root_oops_do(&oopClosureNoBarrier);
+ 
+    if (UseG1GC) {
+      // this should work also for other GCs
+      CodeCache::nmethods_do(register_nmethod_g1);
+    }
+
+   }
+   log_trace(redefine, class, obsolete, metadata)("After updating instances");
+ 
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+index 9755944d70b..4c0412d343d 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+@@ -116,7 +116,8 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+ 
+   void rollback();
+   static void mark_as_scavengable(nmethod* nm);
+-  static void mark_as_scavengable_g1(nmethod* nm);
+  static void unregister_nmethod_g1(nmethod* nm);
+  static void register_nmethod_g1(nmethod* nm);
+   static void unpatch_bytecode(Method* method);
+   static void fix_invoke_method(Method* method);
+ 
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0014-Initialize-method-s-_new_version-_old_version-to-NUL.patch
+++ b/jb/project/tools/patches/dcevm/0014-Initialize-method-s-_new_version-_old_version-to-NUL.patch
@@ -0,0 +1,26 @@
+From 5c7e5f245f79d7e8575461dab0c356ed74c8e9a3 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Thu, 22 Oct 2020 20:15:20 +0200
+Subject: [PATCH 14/34] Initialize method's _new_version/_old_version to NULL
+
+---
+ src/hotspot/share/oops/method.cpp | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/oops/method.cpp b/src/hotspot/share/oops/method.cpp
+index 1c88511a5fc..ce940cf10a9 100644
+--- a/src/hotspot/share/oops/method.cpp
+++ b/src/hotspot/share/oops/method.cpp
+@@ -91,7 +91,8 @@ Method* Method::allocate(ClassLoaderData* loader_data,
+   return new (loader_data, size, MetaspaceObj::MethodType, THREAD) Method(cm, access_flags);
+ }
+ 
+-Method::Method(ConstMethod* xconst, AccessFlags access_flags) {
+Method::Method(ConstMethod* xconst, AccessFlags access_flags) :  _new_version(NULL),
+                                                                 _old_version(NULL) {
+   NoSafepointVerifier no_safepoint;
+   set_constMethod(xconst);
+   set_access_flags(access_flags);
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0015-Clear-dcevm-code-separation.patch
+++ b/jb/project/tools/patches/dcevm/0015-Clear-dcevm-code-separation.patch
@@ -0,0 +1,193 @@
+From 6ffac6e5064ec6633fdbeb8520333dca00bc6a62 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Fri, 23 Oct 2020 10:20:26 +0200
+Subject: [PATCH 15/34] Clear dcevm code separation
+
+---
+ src/hotspot/share/classfile/systemDictionary.cpp |  4 ++--
+ src/hotspot/share/gc/serial/genMarkSweep.cpp     |  8 +++++---
+ src/hotspot/share/interpreter/linkResolver.cpp   | 16 +++++++++++-----
+ .../instrumentation/jfrEventClassTransformer.cpp |  2 +-
+ src/hotspot/share/oops/instanceKlass.cpp         | 10 ++++++----
+ src/hotspot/share/oops/method.cpp                |  2 +-
+ .../share/prims/jvmtiGetLoadedClasses.cpp        |  2 +-
+ src/hotspot/share/runtime/reflection.cpp         |  2 +-
+ 8 files changed, 28 insertions(+), 18 deletions(-)
+
+diff --git a/src/hotspot/share/classfile/systemDictionary.cpp b/src/hotspot/share/classfile/systemDictionary.cpp
+index 8f2b46add4d..9ac6ec96cb5 100644
+--- a/src/hotspot/share/classfile/systemDictionary.cpp
+++ b/src/hotspot/share/classfile/systemDictionary.cpp
+@@ -1241,7 +1241,7 @@ InstanceKlass* SystemDictionary::resolve_from_stream(Symbol* class_name,
+     MutexLocker mu(THREAD, SystemDictionary_lock);
+ 
+     Klass* check = find_class(h_name, k->class_loader_data());
+-    assert((check == k && !k->is_redefining()) || (k->is_redefining() && check == k->old_version()), "should be present in the dictionary");
+    assert(check == k && !k->is_redefining() || k->is_redefining() && check == k->old_version(), "should be present in the dictionary");
+   } );
+ 
+   return k;
+@@ -2290,7 +2290,7 @@ void SystemDictionary::check_constraints(unsigned int d_hash,
+       // also hold array classes.
+ 
+       assert(check->is_instance_klass(), "noninstance in systemdictionary");
+-      if ((defining == true) || ((k != check) && k->old_version() != check)) {
+      if ((defining == true) || (k != check && (!AllowEnhancedClassRedefinition || k->old_version() != check))) {
+         throwException = true;
+         ss.print("loader %s", loader_data->loader_name_and_id());
+         ss.print(" attempted duplicate %s definition for %s. (%s)",
+diff --git a/src/hotspot/share/gc/serial/genMarkSweep.cpp b/src/hotspot/share/gc/serial/genMarkSweep.cpp
+index 1d13c647452..548df01e557 100644
+--- a/src/hotspot/share/gc/serial/genMarkSweep.cpp
+++ b/src/hotspot/share/gc/serial/genMarkSweep.cpp
+@@ -334,7 +334,9 @@ void GenMarkSweep::mark_sweep_phase4() {
+ 
+   GenCompactClosure blk;
+   gch->generation_iterate(&blk, true);
+-  DcevmSharedGC::copy_rescued_objects_back(MarkSweep::_rescued_oops, true);
+-  DcevmSharedGC::clear_rescued_objects_resource(MarkSweep::_rescued_oops);
+-  MarkSweep::_rescued_oops = NULL;
+  if (AllowEnhancedClassRedefinition) {
+    DcevmSharedGC::copy_rescued_objects_back(MarkSweep::_rescued_oops, true);
+    DcevmSharedGC::clear_rescued_objects_resource(MarkSweep::_rescued_oops);
+    MarkSweep::_rescued_oops = NULL;
+  }
+ }
+diff --git a/src/hotspot/share/interpreter/linkResolver.cpp b/src/hotspot/share/interpreter/linkResolver.cpp
+index b6e9e0a308d..b2f24ddbeda 100644
+--- a/src/hotspot/share/interpreter/linkResolver.cpp
+++ b/src/hotspot/share/interpreter/linkResolver.cpp
+@@ -282,9 +282,14 @@ void LinkResolver::check_klass_accessibility(Klass* ref_klass, Klass* sel_klass,
+   if (!base_klass->is_instance_klass()) {
+     return;  // no relevant check to do
+   }
+-
+-  Reflection::VerifyClassAccessResults vca_result =
+-    Reflection::verify_class_access(ref_klass->newest_version(), InstanceKlass::cast(base_klass->newest_version()), true);
+  Klass* refKlassNewest = ref_klass;
+  Klass* baseKlassNewest = base_klass;
+  if (AllowEnhancedClassRedefinition) {
+    refKlassNewest = ref_klass->newest_version();
+    baseKlassNewest = base_klass->newest_version();
+  }
+  Reflection::VerifyClassAccessResults vca_result = 
+    Reflection::verify_class_access(refKlassNewest, InstanceKlass::cast(baseKlassNewest), true);
+   if (vca_result != Reflection::ACCESS_OK) {
+     ResourceMark rm(THREAD);
+     char* msg = Reflection::verify_class_access_msg(ref_klass,
+@@ -566,7 +571,8 @@ void LinkResolver::check_method_accessability(Klass* ref_klass,
+   // We'll check for the method name first, as that's most likely
+   // to be false (so we'll short-circuit out of these tests).
+   if (sel_method->name() == vmSymbols::clone_name() &&
+-      sel_klass->newest_version() == SystemDictionary::Object_klass()->newest_version() &&
+      ( !AllowEnhancedClassRedefinition && sel_klass == SystemDictionary::Object_klass() ||
+      AllowEnhancedClassRedefinition && sel_klass->newest_version() == SystemDictionary::Object_klass()->newest_version()) &&
+       resolved_klass->is_array_klass()) {
+     // We need to change "protected" to "public".
+     assert(flags.is_protected(), "clone not protected?");
+@@ -1011,7 +1017,7 @@ void LinkResolver::resolve_field(fieldDescriptor& fd,
+     //     or by the <init> method (in case of an instance field).
+     if (is_put && fd.access_flags().is_final()) {
+ 
+-      if (sel_klass != current_klass && sel_klass != current_klass->active_version()) {
+      if (sel_klass != current_klass && (!AllowEnhancedClassRedefinition || sel_klass != current_klass->active_version())) {
+         ResourceMark rm(THREAD);
+         stringStream ss;
+         ss.print("Update to %s final field %s.%s attempted from a different class (%s) than the field's declaring class",
+diff --git a/src/hotspot/share/jfr/instrumentation/jfrEventClassTransformer.cpp b/src/hotspot/share/jfr/instrumentation/jfrEventClassTransformer.cpp
+index 96fc139bea3..f7284197c5a 100644
+--- a/src/hotspot/share/jfr/instrumentation/jfrEventClassTransformer.cpp
+++ b/src/hotspot/share/jfr/instrumentation/jfrEventClassTransformer.cpp
+@@ -1471,7 +1471,7 @@ static InstanceKlass* create_new_instance_klass(InstanceKlass* ik, ClassFileStre
+                              cld,
+                              &cl_info,
+                              ClassFileParser::INTERNAL, // internal visibility
+-							 false,
+                             false,
+                              THREAD);
+   if (HAS_PENDING_EXCEPTION) {
+     log_pending_exception(PENDING_EXCEPTION);
+diff --git a/src/hotspot/share/oops/instanceKlass.cpp b/src/hotspot/share/oops/instanceKlass.cpp
+index 3be3a09ef8f..f8e60941046 100644
+--- a/src/hotspot/share/oops/instanceKlass.cpp
+++ b/src/hotspot/share/oops/instanceKlass.cpp
+@@ -199,7 +199,9 @@ bool InstanceKlass::has_nest_member(InstanceKlass* k, TRAPS) const {
+         // able to perform that loading but we can't exclude the compiler threads from
+         // executing this logic. But it should actually be impossible to trigger loading here.
+         Klass* k2 = _constants->klass_at(cp_index, THREAD);
+-        k2 = k2->newest_version();
+        if (AllowEnhancedClassRedefinition) {
+          k2 = k2->newest_version();
+        }
+         assert(!HAS_PENDING_EXCEPTION || PENDING_EXCEPTION->is_a(SystemDictionary::VirtualMachineError_klass()),
+                "Exceptions should not be possible here");
+         if (k2 == k) {
+@@ -1003,7 +1005,7 @@ bool InstanceKlass::link_class_impl(TRAPS) {
+ #endif
+       set_init_state(linked);
+       // (DCEVM) Must check for old version in order to prevent infinite loops.
+-      if (JvmtiExport::should_post_class_prepare() && old_version() == NULL /* JVMTI deadlock otherwise */) {
+      if (JvmtiExport::should_post_class_prepare() && (!AllowEnhancedClassRedefinition || old_version() == NULL) /* JVMTI deadlock otherwise */) {
+         Thread *thread = THREAD;
+         assert(thread->is_Java_thread(), "thread->is_Java_thread()");
+         JvmtiExport::post_class_prepare((JavaThread *) thread, this);
+@@ -1084,7 +1086,7 @@ void InstanceKlass::initialize_impl(TRAPS) {
+     // we might end up throwing IE from link/symbol resolution sites
+     // that aren't expected to throw.  This would wreak havoc.  See 6320309.
+     while ((is_being_initialized() && !is_reentrant_initialization(jt)) 
+-            || (old_version() != NULL && InstanceKlass::cast(old_version())->is_being_initialized())) {
+            || (AllowEnhancedClassRedefinition && old_version() != NULL && InstanceKlass::cast(old_version())->is_being_initialized())) {
+       wait = true;
+       jt->set_class_to_be_initialized(this);
+       ol.wait_uninterruptibly(jt);
+@@ -3782,7 +3784,7 @@ void InstanceKlass::verify_on(outputStream* st) {
+ 
+     guarantee(sib->is_klass(), "should be klass");
+     // TODO: (DCEVM) explain
+-    guarantee(sib->super() == super || super->newest_version() == SystemDictionary::Object_klass(), "siblings should have same superklass");
+    guarantee(sib->super() == super || AllowEnhancedClassRedefinition && super->newest_version() == SystemDictionary::Object_klass(), "siblings should have same superklass");
+   }
+ 
+   // Verify local interfaces
+diff --git a/src/hotspot/share/oops/method.cpp b/src/hotspot/share/oops/method.cpp
+index ce940cf10a9..2d8e5b0256b 100644
+--- a/src/hotspot/share/oops/method.cpp
+++ b/src/hotspot/share/oops/method.cpp
+@@ -2208,7 +2208,7 @@ void Method::ensure_jmethod_ids(ClassLoaderData* loader_data, int capacity) {
+ // Add a method id to the jmethod_ids
+ jmethodID Method::make_jmethod_id(ClassLoaderData* loader_data, Method* m) {
+   // FIXME: (DCEVM) ???
+-  if (m != m->newest_version()) {
+  if (AllowEnhancedClassRedefinition && m != m->newest_version()) {
+     m = m->newest_version();
+   }
+   ClassLoaderData* cld = loader_data;
+diff --git a/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp b/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp
+index 1c7677f270f..6c12ee64a6e 100644
+--- a/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp
+@@ -75,7 +75,7 @@ public:
+     //         the new version (SystemDictionary stores only new versions). But the LoadedClassesClosure's functionality was
+     //         changed in java8  where jvmtiLoadedClasses collects all classes from all classloaders, therefore we
+     //         must use new versions only.
+-    if (k->new_version()==NULL) {
+    if (AllowEnhancedClassRedefinition && k->new_version()==NULL) {
+       _classStack.push((jclass) _env->jni_reference(Handle(_cur_thread, k->java_mirror())));
+       if (_dictionary_walk) {
+         // Collect array classes this way when walking the dictionary (because array classes are
+diff --git a/src/hotspot/share/runtime/reflection.cpp b/src/hotspot/share/runtime/reflection.cpp
+index 0e7722dba7d..d67457f02ac 100644
+--- a/src/hotspot/share/runtime/reflection.cpp
+++ b/src/hotspot/share/runtime/reflection.cpp
+@@ -628,7 +628,7 @@ bool Reflection::verify_member_access(const Klass* current_class,
+                                       TRAPS) {
+ 
+   // (DCEVM) Decide accessibility based on active version
+-  if (current_class != NULL) {
+  if (AllowEnhancedClassRedefinition && current_class != NULL) {
+     current_class = current_class->active_version();
+   }
+ 
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0016-Fix-LoadedClassesClosure-fixes-problems-with-remote-.patch
+++ b/jb/project/tools/patches/dcevm/0016-Fix-LoadedClassesClosure-fixes-problems-with-remote-.patch
@@ -0,0 +1,26 @@
+From dc675de6ac42819b8536827ea450fcad13a97448 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Wed, 11 Nov 2020 18:45:15 +0100
+Subject: [PATCH 16/34] Fix LoadedClassesClosure - fixes problems with remote
+ debugging
+
+---
+ src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp b/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp
+index 6c12ee64a6e..2a469555dbd 100644
+--- a/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiGetLoadedClasses.cpp
+@@ -75,7 +75,7 @@ public:
+     //         the new version (SystemDictionary stores only new versions). But the LoadedClassesClosure's functionality was
+     //         changed in java8  where jvmtiLoadedClasses collects all classes from all classloaders, therefore we
+     //         must use new versions only.
+-    if (AllowEnhancedClassRedefinition && k->new_version()==NULL) {
+    if (!AllowEnhancedClassRedefinition || k->new_version()==NULL) {
+       _classStack.push((jclass) _env->jni_reference(Handle(_cur_thread, k->java_mirror())));
+       if (_dictionary_walk) {
+         // Collect array classes this way when walking the dictionary (because array classes are
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0017-pre-dcevm15-Cleanup-code-related-to-removed-CMS.patch
+++ b/jb/project/tools/patches/dcevm/0017-pre-dcevm15-Cleanup-code-related-to-removed-CMS.patch
--- a/jb/project/tools/patches/dcevm/0018-pre-dcevm15-fix-GC-spaces-originally-in-removed-CMS-.patch
+++ b/jb/project/tools/patches/dcevm/0018-pre-dcevm15-fix-GC-spaces-originally-in-removed-CMS-.patch
@@ -0,0 +1,183 @@
+From 1d682efa88c716e1849163d5abff3a3367581d16 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Mon, 16 Nov 2020 21:11:19 +0100
+Subject: [PATCH 18/34] pre dcevm15 - fix GC spaces originally in removed CMS
+ patch
+
+---
+ src/hotspot/share/gc/shared/space.cpp            | 16 ++++++++--------
+ src/hotspot/share/gc/shared/space.hpp            |  6 +++---
+ src/hotspot/share/gc/shared/space.inline.hpp     | 14 ++++++++------
+ .../share/prims/jvmtiEnhancedRedefineClasses.cpp |  6 ++----
+ 4 files changed, 21 insertions(+), 21 deletions(-)
+
+diff --git a/src/hotspot/share/gc/shared/space.cpp b/src/hotspot/share/gc/shared/space.cpp
+index 875a6dc854f..9772c32c42e 100644
+--- a/src/hotspot/share/gc/shared/space.cpp
+++ b/src/hotspot/share/gc/shared/space.cpp
+@@ -375,11 +375,11 @@ HeapWord* CompactibleSpace::forward_compact_top(size_t size, CompactPoint* cp, H
+ }
+ 
+ HeapWord* CompactibleSpace::forward(oop q, size_t size,
+-                                    CompactPoint* cp, HeapWord* compact_top) {
+                                    CompactPoint* cp, HeapWord* compact_top, bool force_forward) {
+   compact_top = forward_compact_top(size, cp, compact_top);
+ 
+   // store the forwarding pointer into the mark word
+-  if (cast_from_oop<HeapWord*>(q) != compact_top || (size_t)q->size() != size) {
+  if (force_forward || cast_from_oop<HeapWord*>(q) != compact_top || (size_t)q->size() != size) {
+     q->forward_to(oop(compact_top));
+     assert(q->is_gc_marked(), "encoding the pointer should preserve the mark");
+   } else {
+@@ -501,7 +501,7 @@ bool CompactibleSpace::must_rescue(oop old_obj, oop new_obj) {
+ 
+   } else {
+     assert(space_index(old_obj) != space_index(new_obj), "old_obj and new_obj must be in different spaces");
+-    if (tenured_gen->is_in_reserved(new_obj)) {
+    if (new_in_tenured) {
+       // Must never rescue when moving from the new into the old generation.
+       assert(GenCollectedHeap::heap()->young_gen()->is_in_reserved(old_obj), "old_obj must be in DefNewGeneration");
+       assert(space_index(old_obj) > space_index(new_obj), "must be");
+@@ -824,14 +824,14 @@ void OffsetTableContigSpace::verify() const {
+ // Compute the forward sizes and leave out objects whose position could
+ // possibly overlap other objects.
+ HeapWord* CompactibleSpace::forward_with_rescue(HeapWord* q, size_t size,
+-                                                CompactPoint* cp, HeapWord* compact_top) {
+                                                CompactPoint* cp, HeapWord* compact_top, bool force_forward) {
+   size_t forward_size = size;
+ 
+   // (DCEVM) There is a new version of the class of q => different size
+   if (oop(q)->klass()->new_version() != NULL) {
+ 
+     size_t new_size = oop(q)->size_given_klass(oop(q)->klass()->new_version());
+-    assert(size != new_size, "instances without changed size have to be updated prior to GC run");
+    // assert(size != new_size, "instances without changed size have to be updated prior to GC run");
+     forward_size = new_size;
+   }
+ 
+@@ -845,7 +845,7 @@ HeapWord* CompactibleSpace::forward_with_rescue(HeapWord* q, size_t size,
+     return compact_top;
+   }
+ 
+-  return forward(oop(q), forward_size, cp, compact_top);
+  return forward(oop(q), forward_size, cp, compact_top, force_forward);
+ }
+ 
+ // Compute the forwarding addresses for the objects that need to be rescued.
+@@ -861,11 +861,11 @@ HeapWord* CompactibleSpace::forward_rescued(CompactPoint* cp, HeapWord* compact_
+       // (DCEVM) There is a new version of the class of q => different size
+       if (oop(q)->klass()->new_version() != NULL) {
+         size_t new_size = oop(q)->size_given_klass(oop(q)->klass()->new_version());
+-        assert(size != new_size, "instances without changed size have to be updated prior to GC run");
+        // assert(size != new_size, "instances without changed size have to be updated prior to GC run");
+         size = new_size;
+       }
+ 
+-      compact_top = cp->space->forward(oop(q), size, cp, compact_top);
+      compact_top = cp->space->forward(oop(q), size, cp, compact_top, true);
+       assert(compact_top <= end(), "must not write over end of space!");
+     }
+     MarkSweep::_rescued_oops->clear();
+diff --git a/src/hotspot/share/gc/shared/space.hpp b/src/hotspot/share/gc/shared/space.hpp
+index c9bfc365f0f..f7648995454 100644
+--- a/src/hotspot/share/gc/shared/space.hpp
+++ b/src/hotspot/share/gc/shared/space.hpp
+@@ -405,7 +405,7 @@ public:
+   virtual void prepare_for_compaction(CompactPoint* cp) = 0;
+   // MarkSweep support phase3
+   DEBUG_ONLY(int space_index(oop obj));
+-  bool must_rescue(oop old_obj, oop new_obj);
+  virtual bool must_rescue(oop old_obj, oop new_obj);
+   HeapWord* rescue(HeapWord* old_obj);
+   virtual void adjust_pointers();
+   // MarkSweep support phase4
+@@ -436,11 +436,11 @@ public:
+   // function of the then-current compaction space, and updates "cp->threshold
+   // accordingly".
+   virtual HeapWord* forward(oop q, size_t size, CompactPoint* cp,
+-                    HeapWord* compact_top);
+                    HeapWord* compact_top, bool force_forward);
+   // (DCEVM) same as forwad, but can rescue objects. Invoked only during
+   // redefinition runs
+   HeapWord* forward_with_rescue(HeapWord* q, size_t size, CompactPoint* cp,
+-                                HeapWord* compact_top);
+                                HeapWord* compact_top, bool force_forward);
+ 
+   HeapWord* forward_rescued(CompactPoint* cp, HeapWord* compact_top);
+ 
+diff --git a/src/hotspot/share/gc/shared/space.inline.hpp b/src/hotspot/share/gc/shared/space.inline.hpp
+index 5a93e93471b..fa645423685 100644
+--- a/src/hotspot/share/gc/shared/space.inline.hpp
+++ b/src/hotspot/share/gc/shared/space.inline.hpp
+@@ -163,6 +163,8 @@ inline void CompactibleSpace::scan_and_forward(SpaceType* space, CompactPoint* c
+   HeapWord* cur_obj = space->bottom();
+   HeapWord* scan_limit = space->scan_limit();
+ 
+  bool force_forward = false;
+
+   while (cur_obj < scan_limit) {
+     assert(!space->scanned_block_is_obj(cur_obj) ||
+            oop(cur_obj)->mark_raw().is_marked() || oop(cur_obj)->mark_raw().is_unlocked() ||
+@@ -174,14 +176,15 @@ inline void CompactibleSpace::scan_and_forward(SpaceType* space, CompactPoint* c
+       size_t size = space->scanned_block_size(cur_obj);
+ 
+       if (redefinition_run) {
+-        compact_top = cp->space->forward_with_rescue(cur_obj, size, cp, compact_top);
+        compact_top = cp->space->forward_with_rescue(cur_obj, size, cp, compact_top, force_forward);
+         if (first_dead == NULL && oop(cur_obj)->is_gc_marked()) {
+           /* Was moved (otherwise, forward would reset mark),
+              set first_dead to here */
+           first_dead = cur_obj;
+          force_forward = true;
+         }
+       } else {
+-        compact_top = cp->space->forward(oop(cur_obj), size, cp, compact_top);
+        compact_top = cp->space->forward(oop(cur_obj), size, cp, compact_top, false);
+       }
+ 
+       cur_obj += size;
+@@ -197,9 +200,9 @@ inline void CompactibleSpace::scan_and_forward(SpaceType* space, CompactPoint* c
+ 
+       // see if we might want to pretend this object is alive so that
+       // we don't have to compact quite as often.
+-      if (cur_obj == compact_top && dead_spacer.insert_deadspace(cur_obj, end)) {
+      if (!redefinition_run && cur_obj == compact_top && dead_spacer.insert_deadspace(cur_obj, end)) {
+         oop obj = oop(cur_obj);
+-        compact_top = cp->space->forward(obj, obj->size(), cp, compact_top);
+        compact_top = cp->space->forward(obj, obj->size(), cp, compact_top, force_forward);
+         end_of_live = end;
+       } else {
+         // otherwise, it really is a free region.
+@@ -362,8 +365,7 @@ inline void CompactibleSpace::scan_and_compact(SpaceType* space, bool redefiniti
+       Prefetch::write(compaction_top, copy_interval);
+ 
+       // copy object and reinit its mark
+-      assert(cur_obj != compaction_top || oop(cur_obj)->klass()->new_version() != NULL,
+-             "everything in this pass should be moving");
+      assert(redefinition_run || cur_obj != compaction_top, "everything in this pass should be moving");
+       if (redefinition_run && oop(cur_obj)->klass()->new_version() != NULL) {
+         Klass* new_version = oop(cur_obj)->klass()->new_version();
+         if (new_version->update_information() == NULL) {
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index 718426f2819..1da6661dd3e 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -431,13 +431,11 @@ public:
+       Klass* new_klass = obj->klass()->new_version();
+ 
+       if (new_klass->update_information() != NULL) {
+-        int size_diff = obj->size() - obj->size_given_klass(new_klass);
+-
+-        // Either new size is bigger or gap is to small to be filled
+-        if (size_diff < 0 || (size_diff > 0 && (size_t) size_diff < CollectedHeap::min_fill_size())) {
+        if (obj->size() - obj->size_given_klass(new_klass) != 0) {
+           // We need an instance update => set back to old klass
+           _needs_instance_update = true;
+         } else {
+          // Either new size is bigger or gap is to small to be filled
+           oop src = obj;
+           if (new_klass->is_copying_backwards()) {
+             copy_to_tmp(obj);
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0019-dcevm15-fix-java15-patch-compilation-issues.patch
+++ b/jb/project/tools/patches/dcevm/0019-dcevm15-fix-java15-patch-compilation-issues.patch
@@ -0,0 +1,942 @@
+From 297f564f6af79fb824f5b4e9119f1d3d0c827fb0 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Mon, 16 Nov 2020 20:20:12 +0100
+Subject: [PATCH 19/34] dcevm15 - fix java15 patch compilation issues
+
+---
+ .../share/classfile/classFileParser.hpp       |   8 +-
+ .../share/classfile/classLoaderData.cpp       |   2 +-
+ src/hotspot/share/classfile/dictionary.hpp    |  10 +-
+ src/hotspot/share/classfile/javaClasses.hpp   |   2 +
+ .../share/gc/g1/g1FullGCCompactTask.cpp       |   4 +-
+ .../share/gc/g1/g1FullGCCompactionPoint.cpp   |   8 +-
+ .../share/gc/g1/g1FullGCPrepareTask.cpp       |   4 +-
+ src/hotspot/share/gc/shared/dcevmSharedGC.cpp |  14 +-
+ src/hotspot/share/gc/shared/dcevmSharedGC.hpp |   2 +-
+ src/hotspot/share/gc/shared/gcConfig.cpp      |   2 +-
+ src/hotspot/share/gc/shared/space.cpp         |   4 +-
+ .../share/interpreter/linkResolver.cpp        |   2 +-
+ src/hotspot/share/oops/instanceKlass.cpp      |  17 ++-
+ src/hotspot/share/oops/instanceKlass.hpp      |   1 +
+ src/hotspot/share/oops/klass.cpp              |   8 +-
+ src/hotspot/share/prims/jvm.cpp               |   2 +
+ .../prims/jvmtiEnhancedRedefineClasses.cpp    | 129 +++++++++---------
+ .../prims/jvmtiEnhancedRedefineClasses.hpp    |  14 +-
+ src/hotspot/share/prims/jvmtiEnv.cpp          |  11 +-
+ .../share/prims/jvmtiRedefineClasses.cpp      |   1 +
+ src/hotspot/share/prims/methodHandles.hpp     |   3 +
+ src/hotspot/share/runtime/arguments.cpp       |  22 +--
+ src/hotspot/share/runtime/mutexLocker.cpp     |   2 +-
+ 23 files changed, 159 insertions(+), 113 deletions(-)
+
+diff --git a/src/hotspot/share/classfile/classFileParser.hpp b/src/hotspot/share/classfile/classFileParser.hpp
+index e5761e61767..0d266b9047e 100644
+--- a/src/hotspot/share/classfile/classFileParser.hpp
+++ b/src/hotspot/share/classfile/classFileParser.hpp
+@@ -150,9 +150,6 @@ class ClassFileParser {
+   const intArray* _method_ordering;
+   GrowableArray<Method*>* _all_mirandas;
+ 
+-  // Enhanced class redefinition
+-  const bool _pick_newest;
+-
+   enum { fixed_buffer_size = 128 };
+   u_char _linenumbertable_buffer[fixed_buffer_size];
+ 
+@@ -206,6 +203,9 @@ class ClassFileParser {
+   bool _has_vanilla_constructor;
+   int _max_bootstrap_specifier_index;  // detects BSS values
+ 
+  // (DCEVM) Enhanced class redefinition
+  const bool _pick_newest;
+
+   void parse_stream(const ClassFileStream* const stream, TRAPS);
+ 
+   void mangle_hidden_class_name(InstanceKlass* const ik);
+@@ -582,7 +582,7 @@ class ClassFileParser {
+   ClassLoaderData* loader_data() const { return _loader_data; }
+   const Symbol* class_name() const { return _class_name; }
+   const InstanceKlass* super_klass() const { return _super_klass; }
+-  Array<Klass*>* local_interfaces() const { return _local_interfaces; }
+  Array<InstanceKlass*>* local_interfaces() const { return _local_interfaces; }
+ 
+   ReferenceType reference_type() const { return _rt; }
+   AccessFlags access_flags() const { return _access_flags; }
+diff --git a/src/hotspot/share/classfile/classLoaderData.cpp b/src/hotspot/share/classfile/classLoaderData.cpp
+index 4d64c6b454a..aadcd50ef4a 100644
+--- a/src/hotspot/share/classfile/classLoaderData.cpp
+++ b/src/hotspot/share/classfile/classLoaderData.cpp
+@@ -597,7 +597,7 @@ void ClassLoaderData::exchange_holders(ClassLoaderData* cld) {
+   oop holder_oop = _holder.peek();
+   _holder.replace(cld->_holder.peek());
+   cld->_holder.replace(holder_oop);
+-  WeakHandle<vm_class_loader_data> exchange = _holder;
+  WeakHandle<vm_weak_data> exchange = _holder;
+   _holder = cld->_holder;
+   cld->_holder = exchange;
+ }
+diff --git a/src/hotspot/share/classfile/dictionary.hpp b/src/hotspot/share/classfile/dictionary.hpp
+index 114a983e783..a50f4ff84d2 100644
+--- a/src/hotspot/share/classfile/dictionary.hpp
+++ b/src/hotspot/share/classfile/dictionary.hpp
+@@ -84,6 +84,11 @@ public:
+   void print_on(outputStream* st) const;
+   void verify();
+ 
+  // (DCEVM) Enhanced class redefinition
+  bool update_klass(unsigned int hash, Symbol* name, ClassLoaderData* loader_data, InstanceKlass* k, InstanceKlass* old_klass);
+
+  void rollback_redefinition();
+
+  private:
+   DictionaryEntry* new_entry(unsigned int hash, InstanceKlass* klass);
+ 
+@@ -106,11 +111,6 @@ public:
+ 
+   void free_entry(DictionaryEntry* entry);
+ 
+-  // Enhanced class redefinition
+-  bool update_klass(unsigned int hash, Symbol* name, ClassLoaderData* loader_data, InstanceKlass* k, InstanceKlass* old_klass);
+-
+-  void rollback_redefinition();
+-
+   // (DCEVM) return old class if redefining in AllowEnhancedClassRedefinition, otherwise return "k"
+   static InstanceKlass* old_if_redefined(InstanceKlass* k) {
+     return (k != NULL && k->is_redefining()) ? ((InstanceKlass* )k->old_version()) : k;
+diff --git a/src/hotspot/share/classfile/javaClasses.hpp b/src/hotspot/share/classfile/javaClasses.hpp
+index a68c5139151..9abf2e1d105 100644
+--- a/src/hotspot/share/classfile/javaClasses.hpp
+++ b/src/hotspot/share/classfile/javaClasses.hpp
+@@ -255,7 +255,9 @@ class java_lang_Class : AllStatic {
+   static void set_init_lock(oop java_class, oop init_lock);
+   static void set_protection_domain(oop java_class, oop protection_domain);
+   static void set_class_loader(oop java_class, oop class_loader);
+ public: // DCEVM
+   static void set_component_mirror(oop java_class, oop comp_mirror);
+ private:
+   static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain,
+                                        Handle classData, TRAPS);
+   static void initialize_mirror_fields(Klass* k, Handle mirror, Handle protection_domain, TRAPS);
+diff --git a/src/hotspot/share/gc/g1/g1FullGCCompactTask.cpp b/src/hotspot/share/gc/g1/g1FullGCCompactTask.cpp
+index f70f4606dc8..a22ed48560d 100644
+--- a/src/hotspot/share/gc/g1/g1FullGCCompactTask.cpp
+++ b/src/hotspot/share/gc/g1/g1FullGCCompactTask.cpp
+@@ -157,14 +157,14 @@ void G1FullGCCompactTask::serial_compaction_dcevm() {
+ 
+ size_t G1FullGCCompactTask::G1CompactRegionClosureDcevm::apply(oop obj) {
+   size_t size = obj->size();
+-  HeapWord* destination = (HeapWord*)obj->forwardee();
+  HeapWord* destination = cast_from_oop<HeapWord*>(obj->forwardee());
+   if (destination == NULL) {
+     // Object not moving
+     return size;
+   }
+ 
+   // copy object and reinit its mark
+-  HeapWord* obj_addr = (HeapWord*) obj;
+  HeapWord* obj_addr = cast_from_oop<HeapWord*>(obj);
+ 
+   if (!_rescue_oops_it->at_end() && **_rescue_oops_it == obj_addr) {
+     ++(*_rescue_oops_it);
+diff --git a/src/hotspot/share/gc/g1/g1FullGCCompactionPoint.cpp b/src/hotspot/share/gc/g1/g1FullGCCompactionPoint.cpp
+index 1e49571c999..755935a2c91 100644
+--- a/src/hotspot/share/gc/g1/g1FullGCCompactionPoint.cpp
+++ b/src/hotspot/share/gc/g1/g1FullGCCompactionPoint.cpp
+@@ -174,7 +174,7 @@ void G1FullGCCompactionPoint::forward_dcevm(oop object, size_t size, bool force_
+   assert(_current_region != NULL, "Must have been initialized");
+ 
+   // Store a forwarding pointer if the object should be moved.
+-  if ((HeapWord*)object != _compaction_top || force_forward) {
+  if (cast_from_oop<HeapWord*>(object) != _compaction_top || force_forward) {
+     object->forward_to(oop(_compaction_top));
+   } else {
+     if (object->forwardee() != NULL) {
+@@ -188,11 +188,11 @@ void G1FullGCCompactionPoint::forward_dcevm(oop object, size_t size, bool force_
+     } else {
+       // Make sure object has the correct mark-word set or that it will be
+       // fixed when restoring the preserved marks.
+-      assert(object->mark_raw() == markOopDesc::prototype_for_object(object) || // Correct mark
+-             object->mark_raw()->must_be_preserved(object) || // Will be restored by PreservedMarksSet
+      assert(object->mark_raw() == markWord::prototype_for_klass(object->klass()) || // Correct mark
+             object->mark_must_be_preserved() || // Will be restored by PreservedMarksSet
+              (UseBiasedLocking && object->has_bias_pattern_raw()), // Will be restored by BiasedLocking
+              "should have correct prototype obj: " PTR_FORMAT " mark: " PTR_FORMAT " prototype: " PTR_FORMAT,
+-             p2i(object), p2i(object->mark_raw()), p2i(markOopDesc::prototype_for_object(object)));
+             p2i(object), object->mark_raw().value(), markWord::prototype_for_klass(object->klass()).value());
+     }
+     assert(object->forwardee() == NULL, "should be forwarded to NULL");
+   }
+diff --git a/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp b/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp
+index a45681b60cf..2f06b9617e4 100644
+--- a/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp
+++ b/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp
+@@ -269,7 +269,7 @@ size_t G1FullGCPrepareTask::G1PrepareCompactLiveClosureDcevm::apply(oop object)
+   HeapWord* compact_top = _cp->forward_compact_top(forward_size);
+ 
+   if (compact_top == NULL || must_rescue(object, oop(compact_top))) {
+-    _cp->rescued_oops()->append((HeapWord*)object);
+    _cp->rescued_oops()->append(cast_from_oop<HeapWord*>(object));
+   } else {
+     _cp->forward_dcevm(object, forward_size, (size != forward_size));
+   }
+@@ -295,7 +295,7 @@ bool G1FullGCPrepareTask::G1PrepareCompactLiveClosureDcevm::must_rescue(oop old_
+   int new_size = old_obj->size_given_klass(oop(old_obj)->klass()->new_version());
+   int original_size = old_obj->size();
+ 
+-  bool overlap = ((HeapWord*)old_obj + original_size < (HeapWord*)new_obj + new_size);
+  bool overlap = (cast_from_oop<HeapWord*>(old_obj) + original_size < cast_from_oop<HeapWord*>(new_obj) + new_size);
+ 
+   return overlap;
+ }
+diff --git a/src/hotspot/share/gc/shared/dcevmSharedGC.cpp b/src/hotspot/share/gc/shared/dcevmSharedGC.cpp
+index 803e645f843..3dee097f1d3 100644
+--- a/src/hotspot/share/gc/shared/dcevmSharedGC.cpp
+++ b/src/hotspot/share/gc/shared/dcevmSharedGC.cpp
+@@ -58,10 +58,10 @@ void DcevmSharedGC::copy_rescued_objects_back(GrowableArray<HeapWord*>* rescued_
+           DcevmSharedGC::update_fields(rescued_obj, new_obj);
+         } else {
+           rescued_obj->set_klass(new_klass);
+-          Copy::aligned_disjoint_words((HeapWord*)rescued_obj, (HeapWord*)new_obj, size);
+          Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(rescued_obj), cast_from_oop<HeapWord*>(new_obj), size);
+         }
+       } else {
+-        Copy::aligned_disjoint_words((HeapWord*)rescued_obj, (HeapWord*)new_obj, size);
+        Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(rescued_obj), cast_from_oop<HeapWord*>(new_obj), size);
+       }
+ 
+       new_obj->init_mark_raw();
+@@ -111,11 +111,11 @@ void DcevmSharedGC::update_fields(oop q, oop new_location) {
+ 
+   // Save object somewhere, there is an overlap in fields
+   if (new_klass_oop->is_copying_backwards()) {
+-    if (((HeapWord *)q >= (HeapWord *)new_location && (HeapWord *)q < (HeapWord *)new_location + new_size) ||
+-        ((HeapWord *)new_location >= (HeapWord *)q && (HeapWord *)new_location < (HeapWord *)q + size)) {
+    if ((cast_from_oop<HeapWord*>(q) >= cast_from_oop<HeapWord*>(new_location) && cast_from_oop<HeapWord*>(q) < cast_from_oop<HeapWord*>(new_location) + new_size) ||
+        (cast_from_oop<HeapWord*>(new_location) >= cast_from_oop<HeapWord*>(q) && cast_from_oop<HeapWord*>(new_location) < cast_from_oop<HeapWord*>(q) + size)) {
+        tmp = NEW_RESOURCE_ARRAY(HeapWord, size);
+        q = (oop) tmp;
+-       Copy::aligned_disjoint_words((HeapWord*)tmp_obj, (HeapWord*)q, size);
+       Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(tmp_obj), cast_from_oop<HeapWord*>(q), size);
+     }
+   }
+ 
+@@ -131,13 +131,13 @@ void DcevmSharedGC::update_fields(oop q, oop new_location) {
+ 
+ void DcevmSharedGC::update_fields(oop new_location, oop tmp_obj, int *cur) {
+   assert(cur != NULL, "just checking");
+-  char* to = (char*)(HeapWord*)new_location;
+  char* to = (char*)cast_from_oop<HeapWord*>(new_location);
+   while (*cur != 0) {
+     int size = *cur;
+     if (size > 0) {
+       cur++;
+       int offset = *cur;
+-      HeapWord* from = (HeapWord*)(((char *)(HeapWord*)tmp_obj) + offset);
+      HeapWord* from = (HeapWord*)(((char *)cast_from_oop<HeapWord*>(tmp_obj)) + offset);
+       if (size == HeapWordSize) {
+         *((HeapWord*)to) = *from;
+       } else if (size == HeapWordSize * 2) {
+diff --git a/src/hotspot/share/gc/shared/dcevmSharedGC.hpp b/src/hotspot/share/gc/shared/dcevmSharedGC.hpp
+index e2ef0171fb2..a4e27e00280 100644
+--- a/src/hotspot/share/gc/shared/dcevmSharedGC.hpp
+++ b/src/hotspot/share/gc/shared/dcevmSharedGC.hpp
+@@ -29,7 +29,7 @@
+ #include "gc/shared/genOopClosures.hpp"
+ #include "gc/shared/taskqueue.hpp"
+ #include "memory/iterator.hpp"
+-#include "oops/markOop.hpp"
+#include "oops/markWord.hpp"
+ #include "oops/oop.hpp"
+ #include "runtime/timer.hpp"
+ #include "utilities/growableArray.hpp"
+diff --git a/src/hotspot/share/gc/shared/gcConfig.cpp b/src/hotspot/share/gc/shared/gcConfig.cpp
+index f01d64d1434..5c1a09390f1 100644
+--- a/src/hotspot/share/gc/shared/gcConfig.cpp
+++ b/src/hotspot/share/gc/shared/gcConfig.cpp
+@@ -100,7 +100,7 @@ void GCConfig::fail_if_non_included_gc_is_selected() {
+ void GCConfig::select_gc_ergonomically() {
+   if (AllowEnhancedClassRedefinition && !UseG1GC) {
+     // Enhanced class redefinition only supports serial GC at the moment
+-    FLAG_SET_ERGO(bool, UseSerialGC, true);
+    FLAG_SET_ERGO(UseSerialGC, true);
+   } else if (os::is_server_class_machine()) {
+ #if INCLUDE_G1GC
+     FLAG_SET_ERGO_IF_DEFAULT(UseG1GC, true);
+diff --git a/src/hotspot/share/gc/shared/space.cpp b/src/hotspot/share/gc/shared/space.cpp
+index 9772c32c42e..e8e3d7884c2 100644
+--- a/src/hotspot/share/gc/shared/space.cpp
+++ b/src/hotspot/share/gc/shared/space.cpp
+@@ -440,7 +440,7 @@ int CompactibleSpace::space_index(oop obj) {
+     index++;
+   }
+ 
+-  tty->print_cr("could not compute space_index for %08xh", (HeapWord*)obj);
+  tty->print_cr("could not compute space_index for %08xh", cast_from_oop<HeapWord*>(obj));
+   index = 0;
+ 
+   Generation* gen = heap->old_gen();
+@@ -485,7 +485,7 @@ bool CompactibleSpace::must_rescue(oop old_obj, oop new_obj) {
+   bool new_in_tenured = tenured_gen->is_in_reserved(new_obj);
+   if (old_in_tenured == new_in_tenured) {
+     // Rescue if object may overlap with a higher memory address.
+-    bool overlap = ((HeapWord*)old_obj + original_size < (HeapWord*)new_obj + new_size);
+    bool overlap = (cast_from_oop<HeapWord*>(old_obj) + original_size < cast_from_oop<HeapWord*>(new_obj) + new_size);
+     if (old_in_tenured) {
+       // Old and new address are in same space, so just compare the address.
+       // Must rescue if object moves towards the top of the space.
+diff --git a/src/hotspot/share/interpreter/linkResolver.cpp b/src/hotspot/share/interpreter/linkResolver.cpp
+index b2f24ddbeda..9daeeb70b34 100644
+--- a/src/hotspot/share/interpreter/linkResolver.cpp
+++ b/src/hotspot/share/interpreter/linkResolver.cpp
+@@ -1031,7 +1031,7 @@ void LinkResolver::resolve_field(fieldDescriptor& fd,
+         assert(m != NULL, "information about the current method must be available for 'put' bytecodes");
+         bool is_initialized_static_final_update = (byte == Bytecodes::_putstatic &&
+                                                    fd.is_static() &&
+-                                                   !(m()->is_static_initializer() || m()->name() == vmSymbols::ha_class_initializer_name()));
+                                                   !(m->is_static_initializer() || m->name() == vmSymbols::ha_class_initializer_name()));
+         bool is_initialized_instance_final_update = ((byte == Bytecodes::_putfield || byte == Bytecodes::_nofast_putfield) &&
+                                                      !fd.is_static() &&
+                                                      !m->is_object_initializer());
+diff --git a/src/hotspot/share/oops/instanceKlass.cpp b/src/hotspot/share/oops/instanceKlass.cpp
+index f8e60941046..5e40d78a87e 100644
+--- a/src/hotspot/share/oops/instanceKlass.cpp
+++ b/src/hotspot/share/oops/instanceKlass.cpp
+@@ -1316,7 +1316,7 @@ void InstanceKlass::init_implementor() {
+ // (DCEVM) - init_implementor() for dcevm
+ void InstanceKlass::init_implementor_from_redefine() {
+   assert(is_interface(), "not interface");
+-  Klass** addr = adr_implementor();
+  Klass* volatile* addr = adr_implementor();
+   assert(addr != NULL, "null addr");
+   if (addr != NULL) {
+     *addr = NULL;
+@@ -1659,6 +1659,21 @@ void InstanceKlass::methods_do(void f(Method* method)) {
+   }
+ }
+ 
+void InstanceKlass::methods_do(void f(Method* method, TRAPS), TRAPS) {
+  // Methods aren't stable until they are loaded.  This can be read outside
+  // a lock through the ClassLoaderData for profiling
+  if (!is_loaded()) {
+    return;
+  }
+
+  int len = methods()->length();
+  for (int index = 0; index < len; index++) {
+    Method* m = methods()->at(index);
+    assert(m->is_method(), "must be method");
+    f(m, CHECK);
+  }
+}
+
+ //  (DCEVM) Update information contains mapping of fields from old class to the new class.
+ //  Info is stored on HEAP, you need to call clear_update_information to free the space.
+ void InstanceKlass::store_update_information(GrowableArray<int> &values) {
+diff --git a/src/hotspot/share/oops/instanceKlass.hpp b/src/hotspot/share/oops/instanceKlass.hpp
+index 6ead9426728..b56d42cb177 100644
+--- a/src/hotspot/share/oops/instanceKlass.hpp
+++ b/src/hotspot/share/oops/instanceKlass.hpp
+@@ -1069,6 +1069,7 @@ public:
+   void clear_update_information();
+ 
+   void methods_do(void f(Method* method));
+  void methods_do(void f(Method* method, TRAPS), TRAPS);
+   void array_klasses_do(void f(Klass* k));
+   void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
+ 
+diff --git a/src/hotspot/share/oops/klass.cpp b/src/hotspot/share/oops/klass.cpp
+index 352d8f84631..88f5ec9ba4a 100644
+--- a/src/hotspot/share/oops/klass.cpp
+++ b/src/hotspot/share/oops/klass.cpp
+@@ -200,13 +200,13 @@ void* Klass::operator new(size_t size, ClassLoaderData* loader_data, size_t word
+ Klass::Klass(KlassID id) : _id(id),
+                            _java_mirror(NULL),
+                            _prototype_header(markWord::prototype()),
+-                           _shared_class_path_index(-1),
+-                           _new_version(NULL),
+                            _old_version(NULL),
+                           _new_version(NULL),
+                           _redefinition_flags(Klass::NoRedefinition),
+                            _is_redefining(false),
+                           _update_information(NULL),
+                            _is_copying_backwards(false),
+-                           _redefinition_flags(Klass::NoRedefinition),
+-                           _update_information(NULL) {
+                           _shared_class_path_index(-1) {
+   CDS_ONLY(_shared_class_flags = 0;)
+   CDS_JAVA_HEAP_ONLY(_archived_mirror = 0;)
+   _primary_supers[0] = this;
+diff --git a/src/hotspot/share/prims/jvm.cpp b/src/hotspot/share/prims/jvm.cpp
+index 333b65ccfc1..13bcac352fb 100644
+--- a/src/hotspot/share/prims/jvm.cpp
+++ b/src/hotspot/share/prims/jvm.cpp
+@@ -1054,6 +1054,7 @@ static jclass jvm_lookup_define_class(JNIEnv *env, jclass lookup, const char *na
+                                                       class_loader,
+                                                       protection_domain,
+                                                       &st,
+                                                      NULL,
+                                                       CHECK_NULL);
+ 
+     if (log_is_enabled(Debug, class, resolve) && defined_k != NULL) {
+@@ -1074,6 +1075,7 @@ static jclass jvm_lookup_define_class(JNIEnv *env, jclass lookup, const char *na
+                                                class_loader,
+                                                &st,
+                                                cl_info,
+                                               NULL,
+                                                CHECK_NULL);
+     if (defined_k == NULL) {
+       THROW_MSG_0(vmSymbols::java_lang_Error(), "Failure to define a hidden class");
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index 1da6661dd3e..619e3988e3a 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -24,11 +24,14 @@
+ 
+ #include "precompiled.hpp"
+ #include "aot/aotLoader.hpp"
+#include "classfile/classFileParser.hpp"
+ #include "classfile/classFileStream.hpp"
+ #include "classfile/metadataOnStackMark.hpp"
+ #include "classfile/systemDictionary.hpp"
+ #include "classfile/verifier.hpp"
+ #include "classfile/dictionary.hpp"
+#include "classfile/classLoaderDataGraph.hpp"
+#include "interpreter/linkResolver.hpp"
+ #include "interpreter/oopMapCache.hpp"
+ #include "interpreter/rewriter.hpp"
+ #include "logging/logStream.hpp"
+@@ -37,17 +40,22 @@
+ #include "memory/resourceArea.hpp"
+ #include "memory/iterator.inline.hpp"
+ #include "oops/fieldStreams.hpp"
+#include "oops/fieldStreams.inline.hpp"
+ #include "oops/klassVtable.hpp"
+ #include "oops/oop.inline.hpp"
+ #include "oops/constantPool.inline.hpp"
+#include "oops/metadata.hpp"
+#include "oops/methodData.hpp"
+ #include "prims/jvmtiImpl.hpp"
+ #include "prims/jvmtiClassFileReconstituter.hpp"
+ #include "prims/jvmtiEnhancedRedefineClasses.hpp"
+ #include "prims/methodComparator.hpp"
+ #include "prims/resolvedMethodTable.hpp"
+#include "prims/methodHandles.hpp"
+ #include "runtime/deoptimization.hpp"
+ #include "runtime/jniHandles.inline.hpp"
+ #include "runtime/relocator.hpp"
+#include "runtime/fieldDescriptor.hpp"
+ #include "runtime/fieldDescriptor.inline.hpp"
+ #include "utilities/bitMap.inline.hpp"
+ #include "prims/jvmtiThreadState.inline.hpp"
+@@ -55,6 +63,8 @@
+ #include "oops/constantPool.inline.hpp"
+ #include "gc/g1/g1CollectedHeap.hpp"
+ #include "gc/shared/dcevmSharedGC.hpp"
+#include "gc/shared/scavengableNMethods.hpp"
+#include "ci/ciObjectFactory.hpp"
+ 
+ Array<Method*>* VM_EnhancedRedefineClasses::_old_methods = NULL;
+ Array<Method*>* VM_EnhancedRedefineClasses::_new_methods = NULL;
+@@ -66,6 +76,7 @@ int         VM_EnhancedRedefineClasses::_matching_methods_length = 0;
+ int         VM_EnhancedRedefineClasses::_deleted_methods_length  = 0;
+ int         VM_EnhancedRedefineClasses::_added_methods_length    = 0;
+ Klass*      VM_EnhancedRedefineClasses::_the_class_oop = NULL;
+u8        VM_EnhancedRedefineClasses::_id_counter = 0;
+ 
+ //
+ // Create new instance of enhanced class redefiner.
+@@ -88,6 +99,7 @@ VM_EnhancedRedefineClasses::VM_EnhancedRedefineClasses(jint class_count, const j
+   _class_load_kind = class_load_kind;
+   _res = JVMTI_ERROR_NONE;
+   _any_class_has_resolved_methods = false;
+  _id = next_id();
+ }
+ 
+ static inline InstanceKlass* get_ik(jclass def) {
+@@ -211,9 +223,7 @@ class FieldCopier : public FieldClosure {
+ 
+ // TODO: review...
+ void VM_EnhancedRedefineClasses::mark_as_scavengable(nmethod* nm) {
+-  if (!nm->on_scavenge_root_list()) {
+-    CodeCache::add_scavenge_root_nmethod(nm);
+-  }
+  ScavengableNMethods::register_nmethod(nm);
+ }
+ 
+ void VM_EnhancedRedefineClasses::unregister_nmethod_g1(nmethod* nm) {
+@@ -414,7 +424,7 @@ public:
+       _tmp_obj_size = size;
+       _tmp_obj = (oop)resource_allocate_bytes(size * HeapWordSize);
+     }
+-    Copy::aligned_disjoint_words((HeapWord*)o, (HeapWord*)_tmp_obj, size);
+    Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(o), cast_from_oop<HeapWord*>(_tmp_obj), size);
+   }
+ 
+   virtual void do_object(oop obj) {
+@@ -505,9 +515,6 @@ void VM_EnhancedRedefineClasses::doit() {
+     ClearCpoolCacheAndUnpatch clear_cpool_cache(thread);
+     ClassLoaderDataGraph::classes_do(&clear_cpool_cache);
+ 
+-
+-    // SystemDictionary::methods_do(fix_invoke_method);
+-
+   // JSR-292 support
+   if (_any_class_has_resolved_methods) {
+     bool trace_name_printed = false;
+@@ -564,8 +571,8 @@ void VM_EnhancedRedefineClasses::doit() {
+     InstanceKlass* old = InstanceKlass::cast(cur->old_version());
+ 
+     // Swap marks to have same hashcodes
+-    markOop cur_mark = cur->prototype_header();
+-    markOop old_mark = old->prototype_header();
+    markWord cur_mark = cur->prototype_header();
+    markWord old_mark = old->prototype_header();
+     cur->set_prototype_header(old_mark);
+     old->set_prototype_header(cur_mark);
+ 
+@@ -579,14 +586,14 @@ void VM_EnhancedRedefineClasses::doit() {
+       // Revert pool holder for old version of klass (it was updated by one of ours closure!)
+     old->constants()->set_pool_holder(old);
+ 
+-    Klass* array_klasses = old->array_klasses();
+    ObjArrayKlass* array_klasses = old->array_klasses();
+     if (array_klasses != NULL) {
+       assert(cur->array_klasses() == NULL, "just checking");
+ 
+       // Transfer the array classes, otherwise we might get cast exceptions when casting array types.
+       // Also, set array klasses element klass.
+       cur->set_array_klasses(array_klasses);
+-      ObjArrayKlass::cast(array_klasses)->set_element_klass(cur);
+      array_klasses->set_element_klass(cur);
+       java_lang_Class::release_set_array_klass(cur->java_mirror(), array_klasses);
+       java_lang_Class::set_component_mirror(array_klasses->java_mirror(), cur->java_mirror());
+     }
+@@ -641,11 +648,15 @@ void VM_EnhancedRedefineClasses::doit() {
+   //ClassLoaderDataGraph::classes_do(&clean_weak_method_links);
+ 
+   // Disable any dependent concurrent compilations
+-  SystemDictionary::notice_modification();
+  // SystemDictionary::notice_modification();
+
+  JvmtiExport::increment_redefinition_count();
+ 
+   // Set flag indicating that some invariants are no longer true.
+   // See jvmtiExport.hpp for detailed explanation.
+-  JvmtiExport::set_has_redefined_a_class();
+
+  // dcevm15: handled by _redefinition_count
+  // JvmtiExport::set_has_redefined_a_class();
+ 
+ #ifdef PRODUCT
+   if (log_is_enabled(Trace, redefine, class, obsolete, metadata)) {
+@@ -718,7 +729,7 @@ bool VM_EnhancedRedefineClasses::is_modifiable_class(oop klass_mirror) {
+   }
+ 
+   // Cannot redefine or retransform an anonymous class.
+-  if (InstanceKlass::cast(k)->is_anonymous()) {
+  if (InstanceKlass::cast(k)->is_unsafe_anonymous()) {
+     return false;
+   }
+   return true;
+@@ -804,22 +815,30 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
+ 
+     InstanceKlass* k;
+ 
+-    if (InstanceKlass::cast(the_class)->is_anonymous()) {
+-      const InstanceKlass* host_class = the_class->host_klass();
+    if (InstanceKlass::cast(the_class)->is_unsafe_anonymous()) {
+      const InstanceKlass* host_class = the_class->unsafe_anonymous_host();
+ 
+       // Make sure it's the real host class, not another anonymous class.
+-      while (host_class != NULL && host_class->is_anonymous()) {
+-        host_class = host_class->host_klass();
+      while (host_class != NULL && host_class->is_unsafe_anonymous()) {
+        host_class = host_class->unsafe_anonymous_host();
+       }
+ 
+      ClassLoadInfo cl_info(protection_domain,
+                            host_class,
+                            NULL,     // dynamic_nest_host
+                            NULL,     // cp_patches
+                            Handle(), // classData
+                            false,    // is_hidden
+                            false,    // is_strong_hidden
+                            true);    // FIXME: check if correct. can_access_vm_annotations
+
+       k = SystemDictionary::parse_stream(the_class_sym,
+                                          the_class_loader,
+-                                         protection_domain,
+                                          &st,
+-                                         host_class,
+                                         cl_info,
+                                          the_class,
+-                                         NULL,
+                                          THREAD);
+
+       k->class_loader_data()->exchange_holders(the_class->class_loader_data());
+       the_class->class_loader_data()->inc_keep_alive();
+     } else {
+@@ -966,7 +985,7 @@ int VM_EnhancedRedefineClasses::calculate_redefinition_flags(InstanceKlass* new_
+   // Check interfaces
+ 
+   // Interfaces removed?
+-  Array<Klass*>* old_interfaces = the_class->transitive_interfaces();
+  Array<InstanceKlass*>* old_interfaces = the_class->transitive_interfaces();
+   for (i = 0; i < old_interfaces->length(); i++) {
+     InstanceKlass* old_interface = InstanceKlass::cast(old_interfaces->at(i));
+     if (!new_class->implements_interface_any_version(old_interface)) {
+@@ -976,7 +995,7 @@ int VM_EnhancedRedefineClasses::calculate_redefinition_flags(InstanceKlass* new_
+   }
+ 
+   // Interfaces added?
+-  Array<Klass*>* new_interfaces = new_class->transitive_interfaces();
+  Array<InstanceKlass*>* new_interfaces = new_class->transitive_interfaces();
+   for (i = 0; i<new_interfaces->length(); i++) {
+     if (!the_class->implements_interface_any_version(new_interfaces->at(i))) {
+       result = result | Klass::ModifyClass;
+@@ -1389,8 +1408,8 @@ void VM_EnhancedRedefineClasses::rollback() {
+ // Rewrite faster byte-codes back to their slower equivalent. Undoes rewriting happening in templateTable_xxx.cpp
+ // The reason is that once we zero cpool caches, we need to re-resolve all entries again. Faster bytecodes do not
+ // do that, they assume that cache entry is resolved already.
+-void VM_EnhancedRedefineClasses::unpatch_bytecode(Method* method) {
+-  RawBytecodeStream bcs(method);
+void VM_EnhancedRedefineClasses::unpatch_bytecode(Method* method, TRAPS) {
+  RawBytecodeStream bcs(methodHandle(THREAD, method));
+   Bytecodes::Code code;
+   Bytecodes::Code java_code;
+   while (!bcs.is_last_bytecode()) {
+@@ -1454,11 +1473,11 @@ void VM_EnhancedRedefineClasses::ClearCpoolCacheAndUnpatch::do_klass(Klass* k) {
+   HandleMark hm(_thread);
+   InstanceKlass *ik = InstanceKlass::cast(k);
+ 
+-  constantPoolHandle other_cp = constantPoolHandle(ik->constants());
+  constantPoolHandle other_cp = constantPoolHandle(_thread, ik->constants());
+ 
+   // Update host klass of anonymous classes (for example, produced by lambdas) to newest version.
+-  if (ik->is_anonymous() && ik->host_klass()->new_version() != NULL) {
+-    ik->set_host_klass(InstanceKlass::cast(ik->host_klass()->newest_version()));
+  if (ik->is_unsafe_anonymous() && ik->unsafe_anonymous_host()->new_version() != NULL) {
+    ik->set_unsafe_anonymous_host(InstanceKlass::cast(ik->unsafe_anonymous_host()->newest_version()));
+   }
+ 
+   // Update implementor if there is only one, in this case implementor() can reference old class
+@@ -1492,7 +1511,18 @@ void VM_EnhancedRedefineClasses::ClearCpoolCacheAndUnpatch::do_klass(Klass* k) {
+ 
+   // If bytecode rewriting is enabled, we also need to unpatch bytecode to force resolution of zeroed entries
+   if (RewriteBytecodes) {
+-    ik->methods_do(unpatch_bytecode);
+    ik->methods_do(unpatch_bytecode, _thread);
+  }
+}
+
+u8 VM_EnhancedRedefineClasses::next_id() {
+  while (true) {
+    u8 id = _id_counter;
+    u8 next_id = id + 1;
+    u8 result = Atomic::cmpxchg(&_id_counter, id, next_id);
+    if (result == id) {
+      return next_id;
+    }
+   }
+ }
+ 
+@@ -1512,31 +1542,8 @@ void VM_EnhancedRedefineClasses::MethodDataCleaner::do_klass(Klass* k) {
+   }
+ }
+ 
+-void VM_EnhancedRedefineClasses::fix_invoke_method(Method* method) {
+-
+-  constantPoolHandle other_cp = constantPoolHandle(method->constants());
+-
+-  for (int i = 0; i < other_cp->length(); i++) {
+-    if (other_cp->tag_at(i).is_klass()) {
+-      Klass* klass = other_cp->resolved_klass_at(i);
+-      if (klass->new_version() != NULL) {
+-        // Constant pool entry points to redefined class -- update to the new version
+-        other_cp->klass_at_put(i, klass->newest_version());
+-      }
+-      assert(other_cp->resolved_klass_at(i)->new_version() == NULL, "Must be new klass!");
+-    }
+-  }
+-
+-  ConstantPoolCache* cp_cache = other_cp->cache();
+-  if (cp_cache != NULL) {
+-    cp_cache->clear_entries();
+-  }
+-
+-}
+-
+ 
+-
+-void VM_EnhancedRedefineClasses::update_jmethod_ids() {
+void VM_EnhancedRedefineClasses::update_jmethod_ids(TRAPS) {
+   for (int j = 0; j < _matching_methods_length; ++j) {
+     Method* old_method = _matching_old_methods[j];
+     jmethodID jmid = old_method->find_jmethod_id_or_null();
+@@ -1547,10 +1554,10 @@ void VM_EnhancedRedefineClasses::update_jmethod_ids() {
+ 
+     if (jmid != NULL) {
+       // There is a jmethodID, change it to point to the new method
+-      methodHandle new_method_h(_matching_new_methods[j]);
+      methodHandle new_method_h(THREAD, _matching_new_methods[j]);
+ 
+       if (old_method->new_version() == NULL) {
+-        methodHandle old_method_h(_matching_old_methods[j]);
+        methodHandle old_method_h(THREAD, _matching_old_methods[j]);
+         jmethodID new_jmethod_id = Method::make_jmethod_id(old_method_h->method_holder()->class_loader_data(), old_method_h());
+         bool result = InstanceKlass::cast(old_method_h->method_holder())->update_jmethod_id(old_method_h(), new_jmethod_id);
+       } else {
+@@ -1887,7 +1894,7 @@ void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_
+ 
+   // track number of methods that are EMCP for add_previous_version() call below
+   check_methods_and_mark_as_obsolete();
+-  update_jmethod_ids();
+  update_jmethod_ids(THREAD);
+ 
+   _any_class_has_resolved_methods = the_class->has_resolved_methods() || _any_class_has_resolved_methods;
+ 
+@@ -2119,12 +2126,12 @@ jvmtiError VM_EnhancedRedefineClasses::do_topological_class_sorting(TRAPS) {
+ 
+     Handle protection_domain(THREAD, klass->protection_domain());
+ 
+    ClassLoadInfo cl_info(protection_domain);
+
+     ClassFileParser parser(&st,
+                            klass->name(),
+                            klass->class_loader_data(),
+-                           protection_domain,
+-                           NULL, // host_klass
+-                           NULL, // cp_patches
+                           &cl_info,
+                            ClassFileParser::INTERNAL, // publicity level
+                            true,
+                            THREAD);
+@@ -2134,7 +2141,7 @@ jvmtiError VM_EnhancedRedefineClasses::do_topological_class_sorting(TRAPS) {
+       links.append(KlassPair(super_klass, klass));
+     }
+ 
+-    Array<Klass*>* local_interfaces = parser.local_interfaces();
+    Array<InstanceKlass*>* local_interfaces = parser.local_interfaces();
+     for (int j = 0; j < local_interfaces->length(); j++) {
+       Klass* iface = local_interfaces->at(j);
+       if (iface != NULL && _affected_klasses->contains(iface)) {
+@@ -2157,7 +2164,7 @@ jvmtiError VM_EnhancedRedefineClasses::do_topological_class_sorting(TRAPS) {
+         links.append(KlassPair(super_klass, klass));
+       }
+ 
+-      Array<Klass*>* local_interfaces = klass->local_interfaces();
+      Array<InstanceKlass*>* local_interfaces = klass->local_interfaces();
+       for (int j = 0; j < local_interfaces->length(); j++) {
+         Klass* interfaceKlass = local_interfaces->at(j);
+         if (_affected_klasses->contains(interfaceKlass)) {
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+index 4c0412d343d..0066088b3b0 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+@@ -32,7 +32,7 @@
+ #include "memory/resourceArea.hpp"
+ #include "oops/objArrayKlass.hpp"
+ #include "oops/objArrayOop.hpp"
+-#include "gc/shared/vmGCOperations.hpp"
+#include "gc/shared/gcVMOperations.hpp"
+ #include "../../../java.base/unix/native/include/jni_md.h"
+ 
+ //
+@@ -59,6 +59,7 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+   static int             _deleted_methods_length;
+   static int             _added_methods_length;
+   static Klass*          _the_class_oop;
+  static u8              _id_counter;
+ 
+   // The instance fields are used to pass information from
+   // doit_prologue() to doit() and doit_epilogue().
+@@ -91,6 +92,9 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+   elapsedTimer  _timer_heap_iterate;
+   elapsedTimer  _timer_heap_full_gc;
+ 
+  // Redefinition id used by JFR
+  u8 _id;
+
+   // These routines are roughly in call order unless otherwise noted.
+ 
+   // Load and link new classes (either redefined or affected by redefinition - subclass, ...)
+@@ -118,15 +122,14 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+   static void mark_as_scavengable(nmethod* nm);
+   static void unregister_nmethod_g1(nmethod* nm);
+   static void register_nmethod_g1(nmethod* nm);
+-  static void unpatch_bytecode(Method* method);
+-  static void fix_invoke_method(Method* method);
+  static void unpatch_bytecode(Method* method, TRAPS);
+ 
+   // Figure out which new methods match old methods in name and signature,
+   // which methods have been added, and which are no longer present
+   void compute_added_deleted_matching_methods();
+ 
+   // Change jmethodIDs to point to the new methods
+-  void update_jmethod_ids();
+  void update_jmethod_ids(TRAPS);
+ 
+   // marking methods as old and/or obsolete
+   void check_methods_and_mark_as_obsolete();
+@@ -141,6 +144,8 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+ 
+   void flush_dependent_code(InstanceKlass* k_h, TRAPS);
+ 
+  u8 next_id();
+
+   static void check_class(InstanceKlass* k_oop, TRAPS);
+ 
+   static void dump_methods();
+@@ -181,6 +186,7 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+ 
+   bool allow_nested_vm_operations() const        { return true; }
+   jvmtiError check_error()                       { return _res; }
+  u8 id()                                        { return _id; }
+ 
+   // Modifiable test must be shared between IsModifiableClass query
+   // and redefine implementation
+diff --git a/src/hotspot/share/prims/jvmtiEnv.cpp b/src/hotspot/share/prims/jvmtiEnv.cpp
+index b6838ac034d..fba0f48abd7 100644
+--- a/src/hotspot/share/prims/jvmtiEnv.cpp
+++ b/src/hotspot/share/prims/jvmtiEnv.cpp
+@@ -456,20 +456,23 @@ JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
+ 
+   EventRetransformClasses event;
+   jvmtiError error;
+  u8 op_id;
+ 
+   if (AllowEnhancedClassRedefinition) {
+     MutexLocker sd_mutex(EnhancedRedefineClasses_lock);
+     VM_EnhancedRedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
+     VMThread::execute(&op);
+    op_id = op.id();
+     error = (op.check_error());
+   } else {
+     VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
+     VMThread::execute(&op);
+    op_id = op.id();
+     error = op.check_error();
+   }
+   if (error == JVMTI_ERROR_NONE) {
+     event.set_classCount(class_count);
+-    event.set_redefinitionId(op.id());
+    event.set_redefinitionId(op_id);
+     event.commit();
+   }
+   return error;
+@@ -484,19 +487,23 @@ JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_de
+   EventRedefineClasses event;
+   jvmtiError error;
+ 
+  u8 op_id;
+
+   if (AllowEnhancedClassRedefinition) {
+     MutexLocker sd_mutex(EnhancedRedefineClasses_lock);
+     VM_EnhancedRedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
+     VMThread::execute(&op);
+    op_id = op.id();
+     error = (op.check_error());
+   } else {
+     VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
+     VMThread::execute(&op);
+    op_id = op.id();
+     error = op.check_error();
+   }
+   if (error == JVMTI_ERROR_NONE) {
+     event.set_classCount(class_count);
+-    event.set_redefinitionId(op.id());
+    event.set_redefinitionId(op_id);
+     event.commit();
+   }
+   return error;
+diff --git a/src/hotspot/share/prims/jvmtiRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiRedefineClasses.cpp
+index a7840848e10..346eac7c431 100644
+--- a/src/hotspot/share/prims/jvmtiRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiRedefineClasses.cpp
+@@ -1271,6 +1271,7 @@ jvmtiError VM_RedefineClasses::load_new_class_versions(TRAPS) {
+                                                       the_class_loader,
+                                                       &st,
+                                                       cl_info,
+                                                      NULL,
+                                                       THREAD);
+     // Clear class_being_redefined just to be sure.
+     state->clear_class_being_redefined();
+diff --git a/src/hotspot/share/prims/methodHandles.hpp b/src/hotspot/share/prims/methodHandles.hpp
+index 54f36202a5f..917d31efd77 100644
+--- a/src/hotspot/share/prims/methodHandles.hpp
+++ b/src/hotspot/share/prims/methodHandles.hpp
+@@ -180,6 +180,9 @@ public:
+     assert(ref_kind_is_valid(ref_kind), "");
+     return (ref_kind & 1) != 0;
+   }
+  static bool ref_kind_is_static(int ref_kind) {
+    return !ref_kind_has_receiver(ref_kind) && (ref_kind != JVM_REF_newInvokeSpecial);
+  }
+ 
+   static int ref_kind_to_flags(int ref_kind);
+ 
+diff --git a/src/hotspot/share/runtime/arguments.cpp b/src/hotspot/share/runtime/arguments.cpp
+index d05a2893498..3a92b8869dc 100644
+--- a/src/hotspot/share/runtime/arguments.cpp
+++ b/src/hotspot/share/runtime/arguments.cpp
+@@ -2128,13 +2128,15 @@ bool Arguments::check_gc_consistency() {
+   // of collectors.
+   uint i = 0;
+   if (UseSerialGC)                       i++;
+-  if (UseConcMarkSweepGC)                i++;
+-  if (UseParallelGC || UseParallelOldGC) i++;
+  if (UseParallelGC)                     i++;
+   if (UseG1GC)                           i++;
+  if (UseEpsilonGC)                      i++;
+  if (UseZGC)                            i++;
+  if (UseShenandoahGC)                   i++;
+   if (AllowEnhancedClassRedefinition) {
+     // Must use serial GC. This limitation applies because the instance size changing GC modifications
+     // are only built into the mark and compact algorithm.
+-    if ((!UseSerialGC && !UseG1GC) && i >= 1) {
+    if (!UseSerialGC && !UseG1GC && i >= 1) {
+       jio_fprintf(defaultStream::error_stream(),
+                   "Must use the Serial or G1 GC with enhanced class redefinition.\n");
+       return false;
+@@ -4494,18 +4496,18 @@ void Arguments::setup_hotswap_agent() {
+ 
+   // TODO: open it only for org.hotswap.agent module
+   // Use to access java.lang.reflect.Proxy/proxyCache
+-  create_numbered_property("jdk.module.addopens", "java.base/java.lang=ALL-UNNAMED", addopens_count++);
+  create_numbered_module_property("jdk.module.addopens", "java.base/java.lang=ALL-UNNAMED", addopens_count++);
+   // Class of  field java.lang.reflect.Proxy/proxyCache
+-  create_numbered_property("jdk.module.addopens", "java.base/jdk.internal.loader=ALL-UNNAMED", addopens_count++);
+  create_numbered_module_property("jdk.module.addopens", "java.base/jdk.internal.loader=ALL-UNNAMED", addopens_count++);
+   // Use to access java.io.Reader, java.io.InputStream, java.io.FileInputStream
+-  create_numbered_property("jdk.module.addopens", "java.base/java.io=ALL-UNNAMED", addopens_count++);
+  create_numbered_module_property("jdk.module.addopens", "java.base/java.io=ALL-UNNAMED", addopens_count++);
+   // java.beans.Introspector access
+-  create_numbered_property("jdk.module.addopens", "java.desktop/java.beans=ALL-UNNAMED", addopens_count++);
+  create_numbered_module_property("jdk.module.addopens", "java.desktop/java.beans=ALL-UNNAMED", addopens_count++);
+   // java.beans.Introspector access
+-  create_numbered_property("jdk.module.addopens", "java.desktop/com.sun.beans=ALL-UNNAMED", addopens_count++);
+  create_numbered_module_property("jdk.module.addopens", "java.desktop/com.sun.beans=ALL-UNNAMED", addopens_count++);
+   // com.sun.beans.introspect.ClassInfo access
+-  create_numbered_property("jdk.module.addopens", "java.desktop/com.sun.beans.introspect=ALL-UNNAMED", addopens_count++);
+  create_numbered_module_property("jdk.module.addopens", "java.desktop/com.sun.beans.introspect=ALL-UNNAMED", addopens_count++);
+   // com.sun.beans.introspect.util.Cache access
+-  create_numbered_property("jdk.module.addopens", "java.desktop/com.sun.beans.util=ALL-UNNAMED", addopens_count++);
+  create_numbered_module_property("jdk.module.addopens", "java.desktop/com.sun.beans.util=ALL-UNNAMED", addopens_count++);
+ 
+ }
+diff --git a/src/hotspot/share/runtime/mutexLocker.cpp b/src/hotspot/share/runtime/mutexLocker.cpp
+index 6f982072909..14a3ed730fe 100644
+--- a/src/hotspot/share/runtime/mutexLocker.cpp
+++ b/src/hotspot/share/runtime/mutexLocker.cpp
+@@ -287,7 +287,7 @@ void mutex_init() {
+   def(InitCompleted_lock           , PaddedMonitor, leaf,        true,  _safepoint_check_never);
+   def(VtableStubs_lock             , PaddedMutex  , nonleaf,     true,  _safepoint_check_never);
+   def(Notify_lock                  , PaddedMonitor, nonleaf,     true,  _safepoint_check_always);
+-  def(EnhancedRedefineClasses_lock , PaddedMutex  , nonleaf+7,   false, Monitor::_safepoint_check_always);     // for ensuring that class redefinition is not done in parallel
+  def(EnhancedRedefineClasses_lock , PaddedMutex  , nonleaf+7,   false, _safepoint_check_always);     // for ensuring that class redefinition is not done in parallel
+   def(JNICritical_lock             , PaddedMonitor, nonleaf,     true,  _safepoint_check_always); // used for JNI critical regions
+   def(AdapterHandlerLibrary_lock   , PaddedMutex  , nonleaf,     true,  _safepoint_check_always);
+ 
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0020-dcevm15-G1-fixes.patch
+++ b/jb/project/tools/patches/dcevm/0020-dcevm15-G1-fixes.patch
@@ -0,0 +1,25 @@
+From 336cab4f72c6e642e3077ea8d1a4860de33f5a4d Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Tue, 17 Nov 2020 17:40:24 +0100
+Subject: [PATCH 20/34] dcevm15 - G1 fixes
+
+---
+ src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp b/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp
+index 2f06b9617e4..476728a5d26 100644
+--- a/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp
+++ b/src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp
+@@ -240,7 +240,7 @@ void G1FullGCPrepareTask::prepare_serial_compaction_dcevm() {
+ 
+     // collect remaining, not forwarded rescued oops using serial compact point
+     while (cp->last_rescued_oop() < cp->rescued_oops()->length()) {
+-      HeapRegion* hr = G1CollectedHeap::heap()->new_region(HeapRegion::GrainBytes / HeapWordSize, false, true);
+      HeapRegion* hr = G1CollectedHeap::heap()->new_region(HeapRegion::GrainBytes / HeapWordSize, HeapRegionType::Eden, true, G1NUMA::AnyNodeIndex);
+       if (hr == NULL) {
+         vm_exit_out_of_memory(0, OOM_MMAP_ERROR, "G1 - not enough of free regions after redefinition.");
+       }
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0021-dcevm15-Fix-flush-dependent-code.patch
+++ b/jb/project/tools/patches/dcevm/0021-dcevm15-Fix-flush-dependent-code.patch
@@ -0,0 +1,133 @@
+From cea4e2cca3c37233c728be7235f8f9d8be136cb5 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Tue, 17 Nov 2020 18:52:57 +0100
+Subject: [PATCH 21/34] dcevm15 - Fix flush dependent code
+
+---
+ .../prims/jvmtiEnhancedRedefineClasses.cpp    | 57 +++++++------------
+ .../prims/jvmtiEnhancedRedefineClasses.hpp    |  4 +-
+ 2 files changed, 25 insertions(+), 36 deletions(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index 619e3988e3a..efaf11e1666 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -508,7 +508,7 @@ void VM_EnhancedRedefineClasses::doit() {
+ 
+   // Deoptimize all compiled code that depends on this class (do only once, because it clears whole cache)
+   // if (_max_redefinition_flags > Klass::ModifyClass) {
+-    flush_dependent_code(NULL, thread);
+    flush_dependent_code(thread);
+   // }
+ 
+     // Adjust constantpool caches for all classes that reference methods of the evolved class.
+@@ -647,17 +647,8 @@ void VM_EnhancedRedefineClasses::doit() {
+   //MethodDataCleaner clean_weak_method_links;
+   //ClassLoaderDataGraph::classes_do(&clean_weak_method_links);
+ 
+-  // Disable any dependent concurrent compilations
+-  // SystemDictionary::notice_modification();
+-
+   JvmtiExport::increment_redefinition_count();
+ 
+-  // Set flag indicating that some invariants are no longer true.
+-  // See jvmtiExport.hpp for detailed explanation.
+-
+-  // dcevm15: handled by _redefinition_count
+-  // JvmtiExport::set_has_redefined_a_class();
+-
+ #ifdef PRODUCT
+   if (log_is_enabled(Trace, redefine, class, obsolete, metadata)) {
+ #endif
+@@ -1746,6 +1737,18 @@ void VM_EnhancedRedefineClasses::transfer_old_native_function_registrations(Inst
+   transfer.transfer_registrations(_matching_old_methods, _matching_methods_length);
+ }
+ 
+// First step is to walk the code cache for each class redefined and mark
+// dependent methods.  Wait until all classes are processed to deoptimize everything.
+void VM_EnhancedRedefineClasses::mark_dependent_code(InstanceKlass* ik) {
+  assert_locked_or_safepoint(Compile_lock);
+
+  // All dependencies have been recorded from startup or this is a second or
+  // subsequent use of RedefineClasses
+  if (0 && JvmtiExport::all_dependencies_are_recorded()) {
+    CodeCache::mark_for_evol_deoptimization(ik);
+  }
+}
+
+ // DCEVM - it always deoptimizes everything! (because it is very difficult to find only correct dependencies)
+ // Deoptimize all compiled code that depends on this class.
+ //
+@@ -1762,33 +1765,21 @@ void VM_EnhancedRedefineClasses::transfer_old_native_function_registrations(Inst
+ // subsequent calls to RedefineClasses need only throw away code
+ // that depends on the class.
+ //
+-void VM_EnhancedRedefineClasses::flush_dependent_code(InstanceKlass* k_h, TRAPS) {
+void VM_EnhancedRedefineClasses::flush_dependent_code(TRAPS) {
+   assert_locked_or_safepoint(Compile_lock);
+ 
+   // All dependencies have been recorded from startup or this is a second or
+   // subsequent use of RedefineClasses
+   // FIXME: for now, deoptimize all!
+-  if (0 && k_h != NULL && JvmtiExport::all_dependencies_are_recorded()) {
+-    CodeCache::flush_evol_dependents_on(k_h);
+-    Klass* superCl = k_h->super();
+-    // Deoptimize super classes since redefined class can has a new method override
+-    while (superCl != NULL && !superCl->is_redefining()) {
+-      CodeCache::flush_evol_dependents_on(InstanceKlass::cast(superCl));
+-      superCl = superCl->super();
+  if (0 && JvmtiExport::all_dependencies_are_recorded()) {
+    int deopt = CodeCache::mark_dependents_for_evol_deoptimization();
+    log_debug(redefine, class, nmethod)("Marked %d dependent nmethods for deopt", deopt);
+    if (deopt != 0) {
+      CodeCache::flush_evol_dependents();
+     }
+   } else {
+-    CodeCache::mark_all_nmethods_for_deoptimization();
+-
+-    ResourceMark rm(THREAD);
+-    DeoptimizationMarker dm;
+-
+-    // Deoptimize all activations depending on marked nmethods
+-    Deoptimization::deoptimize_dependents();
+-
+-    // Make the dependent methods not entrant
+-    CodeCache::make_marked_nmethods_not_entrant();
+-
+-    // From now on we know that the dependency information is complete
+    CodeCache::mark_all_nmethods_for_evol_deoptimization();
+    CodeCache::flush_evol_dependents();
+     JvmtiExport::set_all_dependencies_are_recorded(true);
+   }
+ }
+@@ -1881,11 +1872,7 @@ void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_
+   JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
+   jvmti_breakpoints.clearall_in_class_at_safepoint(the_class);
+ 
+-  // DCEVM Deoptimization is always for whole java world, call only once after all classes are redefined
+-  // Deoptimize all compiled code that depends on this class
+-//  if (_max_redefinition_flags <= Klass::ModifyClass) {
+-//    flush_dependent_code(the_class, THREAD);
+-//  }
+  mark_dependent_code(the_class);
+ 
+   _old_methods = the_class->methods();
+   _new_methods = new_class->methods();
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+index 0066088b3b0..bd5e7d153be 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+@@ -142,7 +142,9 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+   // and in all direct and indirect subclasses.
+   void increment_class_counter(InstanceKlass *ik, TRAPS);
+ 
+-  void flush_dependent_code(InstanceKlass* k_h, TRAPS);
+  void mark_dependent_code(InstanceKlass* ik);
+
+  void flush_dependent_code(TRAPS);
+ 
+   u8 next_id();
+ 
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0022-dcevm15-fix-ResolvedMethodTable.patch
+++ b/jb/project/tools/patches/dcevm/0022-dcevm15-fix-ResolvedMethodTable.patch
@@ -0,0 +1,211 @@
+From 4f88dcec830d39452f69d1117729469fdb768a8f Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 22 Nov 2020 12:05:26 +0100
+Subject: [PATCH 22/34] dcevm15 - fix ResolvedMethodTable
+
+---
+ src/hotspot/share/classfile/javaClasses.cpp   |   5 -
+ src/hotspot/share/classfile/javaClasses.hpp   |   1 -
+ .../share/prims/resolvedMethodTable.cpp       | 139 +++++++++++-------
+ 3 files changed, 84 insertions(+), 61 deletions(-)
+
+diff --git a/src/hotspot/share/classfile/javaClasses.cpp b/src/hotspot/share/classfile/javaClasses.cpp
+index 9b086a241f7..9a627786d0f 100644
+--- a/src/hotspot/share/classfile/javaClasses.cpp
+++ b/src/hotspot/share/classfile/javaClasses.cpp
+@@ -3996,11 +3996,6 @@ void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop
+   resolved_method->obj_field_put(_vmholder_offset, holder);
+ }
+ 
+-void java_lang_invoke_ResolvedMethodName::set_vmholder_offset(oop resolved_method, Method* m) {
+-  assert(is_instance(resolved_method), "wrong type");
+-  resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
+-}
+-
+ oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
+   const Method* method = m();
+ 
+diff --git a/src/hotspot/share/classfile/javaClasses.hpp b/src/hotspot/share/classfile/javaClasses.hpp
+index 9abf2e1d105..8f5993b7225 100644
+--- a/src/hotspot/share/classfile/javaClasses.hpp
+++ b/src/hotspot/share/classfile/javaClasses.hpp
+@@ -1107,7 +1107,6 @@ class java_lang_invoke_ResolvedMethodName : AllStatic {
+ 
+   static Method* vmtarget(oop resolved_method);
+   static void set_vmtarget(oop resolved_method, Method* method);
+-  static void set_vmholder_offset(oop resolved_method, Method* method);
+ 
+   static void set_vmholder(oop resolved_method, oop holder);
+ 
+diff --git a/src/hotspot/share/prims/resolvedMethodTable.cpp b/src/hotspot/share/prims/resolvedMethodTable.cpp
+index eb9fcda44f3..d0f1667b967 100644
+--- a/src/hotspot/share/prims/resolvedMethodTable.cpp
+++ b/src/hotspot/share/prims/resolvedMethodTable.cpp
+@@ -375,6 +375,67 @@ public:
+   }
+ };
+ 
+class AdjustMethodEntriesDcevm : public StackObj {
+  bool* _trace_name_printed;
+  GrowableArray<oop>* _oops_to_add;
+public:
+  AdjustMethodEntriesDcevm(GrowableArray<oop>* oops_to_add, bool* trace_name_printed) : _trace_name_printed(trace_name_printed), _oops_to_add(oops_to_add) {};
+  bool operator()(WeakHandle<vm_resolved_method_table_data>* entry) {
+    oop mem_name = entry->peek();
+    if (mem_name == NULL) {
+      // Removed
+      return true;
+    }
+
+    Method* old_method = (Method*)java_lang_invoke_ResolvedMethodName::vmtarget(mem_name);
+
+    if (old_method->is_old()) {
+
+      InstanceKlass* newer_klass = InstanceKlass::cast(old_method->method_holder()->new_version());
+      Method* newer_method;
+
+      // Method* new_method;
+      if (old_method->is_deleted()) {
+        newer_method = Universe::throw_no_such_method_error();
+      } else {
+        newer_method = newer_klass->method_with_idnum(old_method->orig_method_idnum());
+
+        log_debug(redefine, class, update)("Adjusting method: '%s' of new class %s", newer_method->name_and_sig_as_C_string(), newer_klass->name()->as_C_string());
+
+        assert(newer_klass == newer_method->method_holder(), "call after swapping redefined guts");
+        assert(newer_method != NULL, "method_with_idnum() should not be NULL");
+        assert(old_method != newer_method, "sanity check");
+
+        Thread* thread = Thread::current();
+        ResolvedMethodTableLookup lookup(thread, method_hash(newer_method), newer_method);
+        ResolvedMethodGet rmg(thread, newer_method);
+
+        if (_local_table->get(thread, lookup, rmg)) {
+          // old method was already adjusted if new method exists in _the_table
+            return true;
+        }
+      }
+
+      java_lang_invoke_ResolvedMethodName::set_vmtarget(mem_name, newer_method);
+      java_lang_invoke_ResolvedMethodName::set_vmholder(mem_name, newer_method->method_holder()->java_mirror());
+
+      newer_klass->set_has_resolved_methods();
+      _oops_to_add->append(mem_name);
+
+      ResourceMark rm;
+      if (!(*_trace_name_printed)) {
+        log_debug(redefine, class, update)("adjust: name=%s", old_method->method_holder()->external_name());
+         *_trace_name_printed = true;
+      }
+      log_debug(redefine, class, update, constantpool)
+        ("ResolvedMethod method update: %s(%s)",
+         newer_method->name()->as_C_string(), newer_method->signature()->as_C_string());
+    }
+
+    return true;
+  }
+};
+
+ // It is called at safepoint only for RedefineClasses
+ void ResolvedMethodTable::adjust_method_entries(bool * trace_name_printed) {
+   assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
+@@ -382,73 +443,41 @@ void ResolvedMethodTable::adjust_method_entries(bool * trace_name_printed) {
+   AdjustMethodEntries adjust(trace_name_printed);
+   _local_table->do_safepoint_scan(adjust);
+ }
+-#endif // INCLUDE_JVMTI
+ 
+-// (DCEVM) It is called at safepoint only for RedefineClasses
+// It is called at safepoint only for RedefineClasses
+ void ResolvedMethodTable::adjust_method_entries_dcevm(bool * trace_name_printed) {
+   assert(SafepointSynchronize::is_at_safepoint(), "only called at safepoint");
+   // For each entry in RMT, change to new method
+-  GrowableArray<oop>* oops_to_add = new GrowableArray<oop>();
+-
+-  for (int i = 0; i < _the_table->table_size(); ++i) {
+-    for (ResolvedMethodEntry* entry = _the_table->bucket(i);
+-         entry != NULL;
+-         entry = entry->next()) {
+-
+-      oop mem_name = entry->object_no_keepalive();
+-      // except ones removed
+-      if (mem_name == NULL) {
+-        continue;
+-      }
+-      Method* old_method = (Method*)java_lang_invoke_ResolvedMethodName::vmtarget(mem_name);
+-
+-      if (old_method->is_old()) {
+-
+-        InstanceKlass* newer_klass = InstanceKlass::cast(old_method->method_holder()->new_version());
+-        Method* newer_method;
+-
+-        // Method* new_method;
+-        if (old_method->is_deleted()) {
+-          newer_method = Universe::throw_no_such_method_error();
+-        } else {
+-          newer_method = newer_klass->method_with_idnum(old_method->orig_method_idnum());
+-
+-          log_debug(redefine, class, update)("Adjusting method: '%s' of new class %s", newer_method->name_and_sig_as_C_string(), newer_klass->name()->as_C_string());
+-
+-          assert(newer_klass == newer_method->method_holder(), "call after swapping redefined guts");
+-          assert(newer_method != NULL, "method_with_idnum() should not be NULL");
+-          assert(old_method != newer_method, "sanity check");
+-
+-          if (_the_table->lookup(newer_method) != NULL) {
+-            // old method was already adjusted if new method exists in _the_table
+-              continue;
+-          }
+-        }
+  GrowableArray<oop> oops_to_add(0);
+  AdjustMethodEntriesDcevm adjust(&oops_to_add, trace_name_printed);
+  _local_table->do_safepoint_scan(adjust);
+  Thread* thread = Thread::current();
+  for (int i = 0; i < oops_to_add.length(); i++) {
+    oop mem_name = oops_to_add.at(i);
+    Method* method = (Method*)java_lang_invoke_ResolvedMethodName::vmtarget(mem_name);
+ 
+-        java_lang_invoke_ResolvedMethodName::set_vmtarget(mem_name, newer_method);
+-        java_lang_invoke_ResolvedMethodName::set_vmholder_offset(mem_name, newer_method);
+    // The hash table takes ownership of the WeakHandle, even if it's not inserted.
+ 
+-        newer_klass->set_has_resolved_methods();
+-        oops_to_add->append(mem_name);
+    ResolvedMethodTableLookup lookup(thread, method_hash(method), method);
+    ResolvedMethodGet rmg(thread, method);
+ 
+-        ResourceMark rm;
+-        if (!(*trace_name_printed)) {
+-          log_debug(redefine, class, update)("adjust: name=%s", old_method->method_holder()->external_name());
+-           *trace_name_printed = true;
+-        }
+-        log_debug(redefine, class, update, constantpool)
+-          ("ResolvedMethod method update: %s(%s)",
+-           newer_method->name()->as_C_string(), newer_method->signature()->as_C_string());
+    while (true) {
+      if (_local_table->get(thread, lookup, rmg)) {
+        break;
+      }
+      WeakHandle<vm_resolved_method_table_data> wh = WeakHandle<vm_resolved_method_table_data>::create(Handle(thread, mem_name));
+      // The hash table takes ownership of the WeakHandle, even if it's not inserted.
+      if (_local_table->insert(thread, lookup, wh)) {
+        log_insert(method);
+        wh.resolve();
+        break;
+       }
+-    }
+-    for (int i = 0; i < oops_to_add->length(); i++) {
+-        oop mem_name = oops_to_add->at(i);
+-        Method* method = (Method*)java_lang_invoke_ResolvedMethodName::vmtarget(mem_name);
+-        _the_table->basic_add(method, Handle(Thread::current(), mem_name));
+     }
+   }
+ }
+ 
+#endif // INCLUDE_JVMTI
+
+ // Verification
+ class VerifyResolvedMethod : StackObj {
+  public:
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0023-dcevm15-fix-Universe-root_oops_do.patch
+++ b/jb/project/tools/patches/dcevm/0023-dcevm15-fix-Universe-root_oops_do.patch
@@ -0,0 +1,88 @@
+From 5379e56465d3d3930ec7ea91b1c64db2cdf70170 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 22 Nov 2020 12:05:50 +0100
+Subject: [PATCH 23/34] dcevm15 - fix Universe::root_oops_do
+
+---
+ src/hotspot/share/memory/universe.cpp | 38 +++++++++------------------
+ 1 file changed, 12 insertions(+), 26 deletions(-)
+
+diff --git a/src/hotspot/share/memory/universe.cpp b/src/hotspot/share/memory/universe.cpp
+index f6e4253b5a5..8dad437bd51 100644
+--- a/src/hotspot/share/memory/universe.cpp
+++ b/src/hotspot/share/memory/universe.cpp
+@@ -39,6 +39,7 @@
+ #include "gc/shared/gcConfig.hpp"
+ #include "gc/shared/gcLogPrecious.hpp"
+ #include "gc/shared/gcTraceTime.inline.hpp"
+#include "gc/shared/weakProcessor.hpp"
+ #include "interpreter/interpreter.hpp"
+ #include "logging/log.hpp"
+ #include "logging/logStream.hpp"
+@@ -75,6 +76,7 @@
+ #include "runtime/thread.inline.hpp"
+ #include "runtime/timerTrace.hpp"
+ #include "runtime/vmOperations.hpp"
+#include "services/management.hpp"
+ #include "services/memoryService.hpp"
+ #include "utilities/align.hpp"
+ #include "utilities/copy.hpp"
+@@ -180,45 +182,29 @@ void Universe::basic_type_classes_do(KlassClosure *closure) {
+ 
+ // FIXME: (DCEVM) This method should iterate all pointers that are not within heap objects.
+ void Universe::root_oops_do(OopClosure *oopClosure) {
+-
+-  class AlwaysTrueClosure: public BoolObjectClosure {
+-  public:
+-    void do_object(oop p) { ShouldNotReachHere(); }
+-    bool do_object_b(oop p) { return true; }
+-  };
+-  AlwaysTrueClosure always_true;
+-
+   Universe::oops_do(oopClosure);
+ //  ReferenceProcessor::oops_do(oopClosure); (tw) check why no longer there
+   JNIHandles::oops_do(oopClosure);   // Global (strong) JNI handles
+   Threads::oops_do(oopClosure, NULL);
+   ObjectSynchronizer::oops_do(oopClosure);
+-  // TODO: review, flat profiler was removed in j10
+-  // FlatProfiler::oops_do(oopClosure);
+-  JvmtiExport::oops_do(oopClosure);
+  // (DCEVM) TODO: Check if this is correct?
+  Management::oops_do(oopClosure);
+  OopStorageSet::vm_global()->oops_do(oopClosure);
+  CLDToOopClosure cld_closure(oopClosure, ClassLoaderData::_claim_none);
+  ClassLoaderDataGraph::cld_do(&cld_closure);
+ 
+   // Now adjust pointers in remaining weak roots.  (All of which should
+   // have been cleared if they pointed to non-surviving objects.)
+   // Global (weak) JNI handles
+-  JNIHandles::weak_oops_do(&always_true, oopClosure);
+  WeakProcessor::oops_do(oopClosure);
+ 
+   CodeBlobToOopClosure blobClosure(oopClosure, CodeBlobToOopClosure::FixRelocations);
+   CodeCache::blobs_do(&blobClosure);
+-  StringTable::oops_do(oopClosure);
+  AOT_ONLY(AOTLoader::oops_do(oopClosure);)
+  // StringTable::oops_do was removed in j15
+  // StringTable::oops_do(oopClosure);
+ 
+-  // (DCEVM) TODO: Check if this is correct?
+-  //CodeCache::scavenge_root_nmethods_oops_do(oopClosure);
+-  //Management::oops_do(oopClosure);
+-  //ref_processor()->weak_oops_do(&oopClosure);
+-  //PSScavenge::reference_processor()->weak_oops_do(&oopClosure);
+-
+-#if INCLUDE_AOT
+-  if (UseAOT) {
+-    AOTLoader::oops_do(oopClosure);
+-  }
+-#endif
+-  // SO_AllClasses
+-  SystemDictionary::oops_do(oopClosure);
+  // PSScavenge::reference_processor()->weak_oops_do(oopClosure);
+ }
+ 
+ void Universe::oops_do(OopClosure* f) {
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0024-Cleanup-dcevm-comments.patch
+++ b/jb/project/tools/patches/dcevm/0024-Cleanup-dcevm-comments.patch
@@ -0,0 +1,67 @@
+From c6ea68e66d37d70739f7b0ee74131322b4526a68 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 22 Nov 2020 12:03:32 +0100
+Subject: [PATCH 24/34] Cleanup dcevm comments
+
+---
+ src/hotspot/share/classfile/classLoaderDataGraph.hpp     | 2 +-
+ src/hotspot/share/classfile/systemDictionary.hpp         | 2 +-
+ src/hotspot/share/gc/shared/gcConfig.cpp                 | 2 +-
+ src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp | 2 +-
+ 4 files changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/src/hotspot/share/classfile/classLoaderDataGraph.hpp b/src/hotspot/share/classfile/classLoaderDataGraph.hpp
+index f380aa3fa34..8ce94cccb47 100644
+--- a/src/hotspot/share/classfile/classLoaderDataGraph.hpp
+++ b/src/hotspot/share/classfile/classLoaderDataGraph.hpp
+@@ -104,7 +104,7 @@ class ClassLoaderDataGraph : public AllStatic {
+ 
+   static void dictionary_classes_do(KlassClosure* klass_closure);
+ 
+-  // Enhanced class redefinition
+  // (DCEVM) Enhanced class redefinition
+   static void rollback_redefinition();
+ 
+   // VM_CounterDecay iteration support
+diff --git a/src/hotspot/share/classfile/systemDictionary.hpp b/src/hotspot/share/classfile/systemDictionary.hpp
+index 931e655d631..1019dbd0d04 100644
+--- a/src/hotspot/share/classfile/systemDictionary.hpp
+++ b/src/hotspot/share/classfile/systemDictionary.hpp
+@@ -455,7 +455,7 @@ public:
+   static bool is_well_known_klass(Symbol* class_name);
+ #endif
+ 
+-  // Enhanced class redefinition
+  // (DCEVM) Enhanced class redefinition
+   static void remove_from_hierarchy(InstanceKlass* k);
+   static void update_constraints_after_redefinition();
+ 
+diff --git a/src/hotspot/share/gc/shared/gcConfig.cpp b/src/hotspot/share/gc/shared/gcConfig.cpp
+index 5c1a09390f1..23fbf715378 100644
+--- a/src/hotspot/share/gc/shared/gcConfig.cpp
+++ b/src/hotspot/share/gc/shared/gcConfig.cpp
+@@ -99,7 +99,7 @@ void GCConfig::fail_if_non_included_gc_is_selected() {
+ 
+ void GCConfig::select_gc_ergonomically() {
+   if (AllowEnhancedClassRedefinition && !UseG1GC) {
+-    // Enhanced class redefinition only supports serial GC at the moment
+    // (DCEVM) Enhanced class redefinition only supports serial GC at the moment
+     FLAG_SET_ERGO(UseSerialGC, true);
+   } else if (os::is_server_class_machine()) {
+ #if INCLUDE_G1GC
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+index bd5e7d153be..5de375fb888 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
+@@ -78,7 +78,7 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
+   // have any entries.
+   bool _any_class_has_resolved_methods;
+ 
+-  // Enhanced class redefinition, affected klasses contain all classes which should be redefined
+  // (DCEVM) Enhanced class redefinition, affected klasses contain all classes which should be redefined
+   // either because of redefine, class hierarchy or interface change
+   GrowableArray<Klass*>*      _affected_klasses;
+ 
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0025-Fix-cpCache-in-not-AllowEnhancedClassRedefinition-mo.patch
+++ b/jb/project/tools/patches/dcevm/0025-Fix-cpCache-in-not-AllowEnhancedClassRedefinition-mo.patch
@@ -0,0 +1,43 @@
+From 507d97966c7145d0ae2533459cc504c7b0d6d5b6 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 22 Nov 2020 18:49:05 +0100
+Subject: [PATCH 25/34] Fix cpCache in not AllowEnhancedClassRedefinition mode
+
+---
+ src/hotspot/share/oops/cpCache.hpp | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/src/hotspot/share/oops/cpCache.hpp b/src/hotspot/share/oops/cpCache.hpp
+index 121a13b1dda..64dcf6223f5 100644
+--- a/src/hotspot/share/oops/cpCache.hpp
+++ b/src/hotspot/share/oops/cpCache.hpp
+@@ -148,13 +148,13 @@ class ConstantPoolCacheEntry {
+   void set_bytecode_2(Bytecodes::Code code);
+   void set_f1(Metadata* f1) {
+     Metadata* existing_f1 = _f1; // read once
+-    //assert(existing_f1 == NULL || existing_f1 == f1, "illegal field change");
+    assert(AllowEnhancedClassRedefinition || existing_f1 == NULL || existing_f1 == f1, "illegal field change");
+     _f1 = f1;
+   }
+   void release_set_f1(Metadata* f1);
+   void set_f2(intx f2) {
+     intx existing_f2 = _f2; // read once
+-    //assert(existing_f2 == 0 || existing_f2 == f2, "illegal field change");
+    assert(AllowEnhancedClassRedefinition || existing_f2 == 0 || existing_f2 == f2, "illegal field change");
+     _f2 = f2;
+   }
+   void set_f2_as_vfinal_method(Method* f2) {
+@@ -215,7 +215,9 @@ class ConstantPoolCacheEntry {
+   void initialize_resolved_reference_index(int ref_index) {
+     assert(_f2 == 0, "set once");  // note: ref_index might be zero also
+     _f2 = ref_index;
+-    _flags = 1 << is_resolved_ref_shift;
+    if (AllowEnhancedClassRedefinition) {
+      _flags = 1 << is_resolved_ref_shift;
+    }
+   }
+ 
+   void set_field(                                // sets entry to resolved field state
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0026-dcevm15-add-ClassLoaderDataGraph_lock-on.patch
+++ b/jb/project/tools/patches/dcevm/0026-dcevm15-add-ClassLoaderDataGraph_lock-on.patch
@@ -0,0 +1,32 @@
+From b516b615c20fafa2094dfb9f4cb08245b26418d0 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 22 Nov 2020 19:51:46 +0100
+Subject: [PATCH 26/34] dcevm15 - add ClassLoaderDataGraph_lock on
+ ClassLoaderDataGraph::classes_do
+
+ClassLoaderDataGraph::classes_do need safepoint or lock,
+find_sorted_affected_classes is not in safepoint therefore it must be
+locked
+---
+ src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index efaf11e1666..197e1c0029f 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -2063,7 +2063,10 @@ jvmtiError VM_EnhancedRedefineClasses::find_sorted_affected_classes(TRAPS) {
+   AffectedKlassClosure closure(_affected_klasses);
+   // Updated in j10, from original SystemDictionary::classes_do
+ 
+-  ClassLoaderDataGraph::classes_do(&closure);
+  {
+    MutexLocker mcld(ClassLoaderDataGraph_lock);
+    ClassLoaderDataGraph::classes_do(&closure);
+  }
+   //ClassLoaderDataGraph::dictionary_classes_do(&closure);
+ 
+   log_trace(redefine, class, load)("%d classes affected", _affected_klasses->length());
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0027-dcevm15-check-if-has_nestmate_access_to-has-newest-h.patch
+++ b/jb/project/tools/patches/dcevm/0027-dcevm15-check-if-has_nestmate_access_to-has-newest-h.patch
@@ -0,0 +1,29 @@
+From c6498946006879314bdc6218ee72da5d9c88f237 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sat, 28 Nov 2020 19:29:42 +0100
+Subject: [PATCH 27/34] dcevm15 - check if has_nestmate_access_to has newest
+ host class
+
+---
+ src/hotspot/share/oops/instanceKlass.cpp | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/src/hotspot/share/oops/instanceKlass.cpp b/src/hotspot/share/oops/instanceKlass.cpp
+index 5e40d78a87e..1d9623f2446 100644
+--- a/src/hotspot/share/oops/instanceKlass.cpp
+++ b/src/hotspot/share/oops/instanceKlass.cpp
+@@ -445,6 +445,11 @@ bool InstanceKlass::has_nestmate_access_to(InstanceKlass* k, TRAPS) {
+     return false;
+   }
+ 
+  if (AllowEnhancedClassRedefinition) {
+    // TODO: (DCEVM) check if it correct. It fix problems with lambdas (hidden)
+    cur_host = InstanceKlass::cast(cur_host->newest_version());
+  }
+
+   Klass* k_nest_host = k->nest_host(CHECK_false);
+   if (k_nest_host == NULL) {
+     return false;
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0028-Remove-unused-fieldType.patch
+++ b/jb/project/tools/patches/dcevm/0028-Remove-unused-fieldType.patch
@@ -0,0 +1,24 @@
+From 86c27155386c1c40642c99c63a242d1f5d8601a5 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sat, 28 Nov 2020 19:31:08 +0100
+Subject: [PATCH 28/34] Remove unused fieldType
+
+---
+ src/hotspot/share/classfile/vmSymbols.hpp | 1 -
+ 1 file changed, 1 deletion(-)
+
+diff --git a/src/hotspot/share/classfile/vmSymbols.hpp b/src/hotspot/share/classfile/vmSymbols.hpp
+index 6a3b234b222..eb06684a288 100644
+--- a/src/hotspot/share/classfile/vmSymbols.hpp
+++ b/src/hotspot/share/classfile/vmSymbols.hpp
+@@ -465,7 +465,6 @@
+   template(static_offset_name,                        "staticOffset")                             \
+   template(static_base_name,                          "staticBase")                               \
+   template(field_offset_name,                         "fieldOffset")                              \
+-  template(field_type_name,                           "fieldType")                                \
+                                                                                                   \
+    /* name symbols needed by intrinsics */                                                         \
+                                                                                                   \
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0029-mark_as_scavengable-only-alive-methods.patch
+++ b/jb/project/tools/patches/dcevm/0029-mark_as_scavengable-only-alive-methods.patch
@@ -0,0 +1,54 @@
+From 025d0d2903963fb79f83cf0d90418783d3ef6813 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 29 Nov 2020 17:18:16 +0100
+Subject: [PATCH 29/34] mark_as_scavengable only alive methods
+
+---
+ .../share/prims/jvmtiEnhancedRedefineClasses.cpp   | 14 ++++++++------
+ 1 file changed, 8 insertions(+), 6 deletions(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index 197e1c0029f..e00fac1f693 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -223,19 +223,21 @@ class FieldCopier : public FieldClosure {
+ 
+ // TODO: review...
+ void VM_EnhancedRedefineClasses::mark_as_scavengable(nmethod* nm) {
+-  ScavengableNMethods::register_nmethod(nm);
+  if (nm->is_alive()) {
+    ScavengableNMethods::register_nmethod(nm);
+  }
+ }
+ 
+ void VM_EnhancedRedefineClasses::unregister_nmethod_g1(nmethod* nm) {
+   // It should work not only for G1 but also for another GCs, but this way is safer now
+-  if (!nm->is_zombie() && !nm->is_unloaded()) {
+  if (nm->is_alive()) {
+     Universe::heap()->unregister_nmethod(nm);
+   }
+ }
+ 
+ void VM_EnhancedRedefineClasses::register_nmethod_g1(nmethod* nm) {
+   // It should work not only for G1 but also for another GCs, but this way is safer now
+-  if (!nm->is_zombie() && !nm->is_unloaded()) {
+  if (nm->is_alive()) {
+     Universe::heap()->register_nmethod(nm);
+   }
+ }
+@@ -511,9 +513,9 @@ void VM_EnhancedRedefineClasses::doit() {
+     flush_dependent_code(thread);
+   // }
+ 
+-    // Adjust constantpool caches for all classes that reference methods of the evolved class.
+-    ClearCpoolCacheAndUnpatch clear_cpool_cache(thread);
+-    ClassLoaderDataGraph::classes_do(&clear_cpool_cache);
+  // Adjust constantpool caches for all classes that reference methods of the evolved class.
+  ClearCpoolCacheAndUnpatch clear_cpool_cache(thread);
+  ClassLoaderDataGraph::classes_do(&clear_cpool_cache);
+ 
+   // JSR-292 support
+   if (_any_class_has_resolved_methods) {
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0030-dcevm15-lock-on-ClassLoaderDataGraph-rollback_redefi.patch
+++ b/jb/project/tools/patches/dcevm/0030-dcevm15-lock-on-ClassLoaderDataGraph-rollback_redefi.patch
@@ -0,0 +1,28 @@
+From 27aabfefe7d799545049bb81ba19d4ed2ff6379c Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 29 Nov 2020 17:20:11 +0100
+Subject: [PATCH 30/34] dcevm15 - lock on
+ ClassLoaderDataGraph::rollback_redefinition
+
+rollback is not in safepoint, therefore must be locked
+---
+ src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index e00fac1f693..db5fb1c472b 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -1382,7 +1382,9 @@ void VM_EnhancedRedefineClasses::calculate_instance_update_information(Klass* ne
+ // Rollback all changes - clear new classes from the system dictionary, return old classes to directory, free memory.
+ void VM_EnhancedRedefineClasses::rollback() {
+   log_info(redefine, class, load)("Rolling back redefinition, result=%d", _res);
+  ClassLoaderDataGraph_lock->lock();
+   ClassLoaderDataGraph::rollback_redefinition();
+  ClassLoaderDataGraph_lock->unlock();
+ 
+   for (int i = 0; i < _new_classes->length(); i++) {
+     SystemDictionary::remove_from_hierarchy(_new_classes->at(i));
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0031-ResourceMark-in-G1IterateObjectClosureTask-fixing-me.patch
+++ b/jb/project/tools/patches/dcevm/0031-ResourceMark-in-G1IterateObjectClosureTask-fixing-me.patch
@@ -0,0 +1,28 @@
+From 9b405cb642d5935c39c8dbd522ea2fdecfc29ef3 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 29 Nov 2020 19:59:50 +0100
+Subject: [PATCH 31/34] ResourceMark in G1IterateObjectClosureTask fixing
+ memory leaks
+
+G1IterateObjectClosureTask is used only in redefinition full GC run
+---
+ src/hotspot/share/gc/g1/g1CollectedHeap.cpp | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/src/hotspot/share/gc/g1/g1CollectedHeap.cpp b/src/hotspot/share/gc/g1/g1CollectedHeap.cpp
+index a29d2dddc2d..2af6df6c1e4 100644
+--- a/src/hotspot/share/gc/g1/g1CollectedHeap.cpp
+++ b/src/hotspot/share/gc/g1/g1CollectedHeap.cpp
+@@ -2362,6 +2362,9 @@ class G1IterateObjectClosureTask : public AbstractGangTask {
+     _cl(cl), _g1h(g1h),  _hrclaimer(g1h->workers()->active_workers()) { }
+ 
+   virtual void work(uint worker_id) {
+    Thread *thread = Thread::current();
+    HandleMark hm(thread);   // make sure any handles created are deleted
+    ResourceMark rm(thread);
+     IterateObjectClosureRegionClosure blk(_cl);
+     _g1h->heap_region_par_iterate_from_worker_offset(&blk, &_hrclaimer, worker_id);
+   }
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0032-dcevm15-fix-hidded-classes.patch
+++ b/jb/project/tools/patches/dcevm/0032-dcevm15-fix-hidded-classes.patch
@@ -0,0 +1,91 @@
+From 40fe40884d4efc50864bb3f2dd88f0a2e7122d5a Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 29 Nov 2020 20:05:03 +0100
+Subject: [PATCH 32/34] dcevm15 - fix hidded classes
+
+---
+ .../prims/jvmtiEnhancedRedefineClasses.cpp    | 41 ++++++++++++++-----
+ 1 file changed, 30 insertions(+), 11 deletions(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+index db5fb1c472b..590f7fdfafe 100644
+--- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
+@@ -722,7 +722,8 @@ bool VM_EnhancedRedefineClasses::is_modifiable_class(oop klass_mirror) {
+   }
+ 
+   // Cannot redefine or retransform an anonymous class.
+-  if (InstanceKlass::cast(k)->is_unsafe_anonymous()) {
+  // TODO: check if is correct in j15
+  if (InstanceKlass::cast(k)->is_unsafe_anonymous() || InstanceKlass::cast(k)->is_hidden()) {
+     return false;
+   }
+   return true;
+@@ -808,21 +809,27 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
+ 
+     InstanceKlass* k;
+ 
+-    if (InstanceKlass::cast(the_class)->is_unsafe_anonymous()) {
+-      const InstanceKlass* host_class = the_class->unsafe_anonymous_host();
+    if (the_class->is_unsafe_anonymous() || the_class->is_hidden()) {
+      InstanceKlass* dynamic_host_class = NULL;
+      InstanceKlass* unsafe_anonymous_host = NULL;
+ 
+-      // Make sure it's the real host class, not another anonymous class.
+-      while (host_class != NULL && host_class->is_unsafe_anonymous()) {
+-        host_class = host_class->unsafe_anonymous_host();
+      if (the_class->is_hidden()) {
+        log_debug(redefine, class, load)("loading hidden class %s", the_class->name()->as_C_string());
+        dynamic_host_class = the_class->nest_host(THREAD);
+      }
+
+      if (the_class->is_unsafe_anonymous()) {
+        log_debug(redefine, class, load)("loading usafe anonymous %s", the_class->name()->as_C_string());
+        unsafe_anonymous_host = the_class->unsafe_anonymous_host();
+       }
+ 
+       ClassLoadInfo cl_info(protection_domain,
+-                            host_class,
+-                            NULL,     // dynamic_nest_host
+                            unsafe_anonymous_host,
+                             NULL,     // cp_patches
+                            dynamic_host_class,     // dynamic_nest_host
+                             Handle(), // classData
+-                            false,    // is_hidden
+-                            false,    // is_strong_hidden
+                            the_class->is_hidden(),    // is_hidden
+                            !the_class->is_non_strong_hidden(),    // is_strong_hidden
+                             true);    // FIXME: check if correct. can_access_vm_annotations
+ 
+       k = SystemDictionary::parse_stream(the_class_sym,
+@@ -833,7 +840,17 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
+                                          THREAD);
+ 
+       k->class_loader_data()->exchange_holders(the_class->class_loader_data());
+-      the_class->class_loader_data()->inc_keep_alive();
+
+      if (the_class->is_hidden()) {
+      // from jvm_lookup_define_class() (jvm.cpp):
+      // The hidden class loader data has been artificially been kept alive to
+      // this point. The mirror and any instances of this class have to keep
+      // it alive afterwards.
+        the_class->class_loader_data()->dec_keep_alive();
+      } else {
+        the_class->class_loader_data()->inc_keep_alive();
+      }
+
+     } else {
+       k = SystemDictionary::resolve_from_stream(the_class_sym,
+                                                   the_class_loader,
+@@ -1475,6 +1492,8 @@ void VM_EnhancedRedefineClasses::ClearCpoolCacheAndUnpatch::do_klass(Klass* k) {
+     ik->set_unsafe_anonymous_host(InstanceKlass::cast(ik->unsafe_anonymous_host()->newest_version()));
+   }
+ 
+  // FIXME: check new nest_host for hidden
+
+   // Update implementor if there is only one, in this case implementor() can reference old class
+   if (ik->is_interface()) {
+     Klass* implKlass = ik->implementor();
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0033-dcevm15-DON-T-clear-F2-in-CP-cache-after-indy-unevol.patch
+++ b/jb/project/tools/patches/dcevm/0033-dcevm15-DON-T-clear-F2-in-CP-cache-after-indy-unevol.patch
@@ -0,0 +1,27 @@
+From 29920b076b4ad96d85adbce0a1d947e5022ba3ad Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 29 Nov 2020 20:08:57 +0100
+Subject: [PATCH 33/34] dcevm15 - DON'T clear F2 in CP cache after indy
+ unevolving
+
+It's not clear why it was cleared in dcevm7-11
+---
+ src/hotspot/share/oops/cpCache.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/oops/cpCache.cpp b/src/hotspot/share/oops/cpCache.cpp
+index 79a38dbeff0..650e6fab42d 100644
+--- a/src/hotspot/share/oops/cpCache.cpp
+++ b/src/hotspot/share/oops/cpCache.cpp
+@@ -650,7 +650,7 @@ void ConstantPoolCacheEntry::clear_entry() {
+ 
+   if (clearData) {
+     if (!is_resolved_reference()) {
+-      _f2 = 0;
+      // _f2 = 0;
+     }
+     // FIXME: (DCEVM) we want to clear flags, but parameter size is actually used
+     // after we return from the method, before entry is re-initialized. So let's
+-- 
+2.23.0
+
--- a/jb/project/tools/patches/dcevm/0034-dcevm15-fix-Universe-root_oops_do.patch
+++ b/jb/project/tools/patches/dcevm/0034-dcevm15-fix-Universe-root_oops_do.patch
@@ -0,0 +1,49 @@
+From 1f13b20ab5553182680045b7d7324ff92da7e7f0 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 29 Nov 2020 21:28:06 +0100
+Subject: [PATCH 34/34] dcevm15 - fix Universe::root_oops_do
+
+Removed ClassLoaderDataGraph::cld_do was cause of crashes due multiple
+oop patching. ClassLoaderDataGraph::cld_do replaced in dcevm15
+previously used and removed SystemDictionary:oops_do
+---
+ src/hotspot/share/memory/universe.cpp | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/src/hotspot/share/memory/universe.cpp b/src/hotspot/share/memory/universe.cpp
+index 8dad437bd51..0199962a684 100644
+--- a/src/hotspot/share/memory/universe.cpp
+++ b/src/hotspot/share/memory/universe.cpp
+@@ -190,21 +190,26 @@ void Universe::root_oops_do(OopClosure *oopClosure) {
+   // (DCEVM) TODO: Check if this is correct?
+   Management::oops_do(oopClosure);
+   OopStorageSet::vm_global()->oops_do(oopClosure);
+-  CLDToOopClosure cld_closure(oopClosure, ClassLoaderData::_claim_none);
+-  ClassLoaderDataGraph::cld_do(&cld_closure);
+  // CLDToOopClosure cld_closure(oopClosure, ClassLoaderData::_claim_none);
+  // ClassLoaderDataGraph::cld_do(&cld_closure);
+ 
+   // Now adjust pointers in remaining weak roots.  (All of which should
+   // have been cleared if they pointed to non-surviving objects.)
+   // Global (weak) JNI handles
+   WeakProcessor::oops_do(oopClosure);
+ 
+  JvmtiExport::oops_do(oopClosure);
+
+   CodeBlobToOopClosure blobClosure(oopClosure, CodeBlobToOopClosure::FixRelocations);
+   CodeCache::blobs_do(&blobClosure);
+  
+   AOT_ONLY(AOTLoader::oops_do(oopClosure);)
+  
+   // StringTable::oops_do was removed in j15
+   // StringTable::oops_do(oopClosure);
+ 
+-  // PSScavenge::reference_processor()->weak_oops_do(oopClosure);
+  // OopStorageSet::vm_global()->oops_do(oopClosure);
+
+ }
+ 
+ void Universe::oops_do(OopClosure* f) {
+-- 
+2.23.0
+
--- a/jb/project/tools/windows/scripts/mkimages_x64.sh
+++ b/jb/project/tools/windows/scripts/mkimages_x64.sh
@@ -0,0 +1,126 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies major version of OpenJDK e.g. 11_0_6 (instead of dots '.' underbars "_" are used)
+#   JDK_BUILD_NUMBER - specifies update release of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#   bundle_type      - specifies bundle to be built; possible values:
+#                        <empty> or nomod - the release bundles without any additional modules (jcef)
+#                        jcef - the release bundles with jcef
+#                        fd - the fastdebug bundles which also include the jcef module
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+# Environment variables:
+#   JCEF_PATH - specifies the path to the directory with JCEF binaries.
+#               By default JCEF binaries should be located in ./jcef_win_x64
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+bundle_type=$4
+JBSDK_VERSION_WITH_DOTS=$(echo $JBSDK_VERSION | sed 's/_/\./g')
+WORK_DIR=$(pwd)
+JCEF_PATH=${JCEF_PATH:=$WORK_DIR/jcef_win_x64}
+
+source jb/project/tools/common/scripts/common.sh
+
+function create_image_bundle {
+  __bundle_name=$1
+  __arch_name=$2
+  __modules_path=$3
+  __modules=$4
+
+  [ -d $__bundle_name ] && rm -rf $__bundle_name
+
+  echo Running jlink ...
+  ${JSDK}/bin/jlink \
+    --module-path $__modules_path --no-man-pages --compress=2 \
+    --add-modules $__modules --output $__bundle_name || do_exit $?
+
+  grep -v "^JAVA_VERSION" "$JSDK"/release | grep -v "^MODULES" >> $__bundle_name/release
+  if [ "$__arch_name" == "$JBRSDK_BUNDLE" ]; then
+    sed 's/JBR/JBRSDK/g' $__bundle_name/release > release
+    mv release $__bundle_name/release
+    copy_jmods "$__modules" "$__modules_path" "$__bundle_name"/jmods
+  fi
+}
+
+WITH_DEBUG_LEVEL="--with-debug-level=release"
+RELEASE_NAME=windows-x86_64-server-release
+
+case "$bundle_type" in
+  "jcef")
+    do_reset_changes=0
+    ;;
+  "dcevm")
+    HEAD_REVISION=$(git rev-parse HEAD)
+    git am jb/project/tools/patches/dcevm/*.patch || do_exit $?
+    do_reset_dcevm=0
+    do_reset_changes=0
+    ;;
+  "nomod" | "")
+    bundle_type=""
+    ;;
+  "fd")
+    do_reset_changes=0
+    WITH_DEBUG_LEVEL="--with-debug-level=fastdebug"
+    RELEASE_NAME=windows-x86_64-server-fastdebug
+    ;;
+esac
+
+sh ./configure \
+  $WITH_DEBUG_LEVEL \
+  --with-vendor-name="$VENDOR_NAME" \
+  --with-vendor-version-string="$VENDOR_VERSION_STRING" \
+  --with-jvm-features=shenandoahgc \
+  --with-version-pre= \
+  --with-version-build=$JDK_BUILD_NUMBER \
+  --with-version-opt=b${build_number} \
+  --with-toolchain-version=$TOOLCHAIN_VERSION \
+  --with-boot-jdk=$BOOT_JDK \
+  --disable-ccache \
+  --enable-cds=yes || do_exit $?
+
+if [ -z "$bundle_type" ]; then
+  make LOG=info CONF=$RELEASE_NAME clean images test-image || do_exit $?
+else
+  make LOG=info CONF=$RELEASE_NAME clean images || do_exit $?
+fi
+
+IMAGES_DIR=build/$RELEASE_NAME/images
+JSDK=$IMAGES_DIR/jdk
+JSDK_MODS_DIR=$IMAGES_DIR/jmods
+JBRSDK_BUNDLE=jbrsdk
+
+where cygpath
+if [ $? -eq 0 ]; then
+  JCEF_PATH="$(cygpath -w $JCEF_PATH)"
+fi
+
+if [ "$bundle_type" == "jcef" ] || [ "$bundle_type" == "dcevm" ] || [ "$bundle_type" == "fd" ]; then
+  git apply -p0 < jb/project/tools/patches/add_jcef_module.patch || do_exit $?
+  update_jsdk_mods "$JSDK" "$JCEF_PATH"/jmods "$JSDK"/jmods "$JSDK_MODS_DIR" || do_exit $?
+  cp $JCEF_PATH/jmods/* ${JSDK_MODS_DIR} # $JSDK/jmods is not unchanged
+
+  jbr_name_postfix="_${bundle_type}"
+fi
+
+# create runtime image bundle
+modules=$(xargs < modules.list | sed s/" "//g) || do_exit $?
+create_image_bundle "jbr${jbr_name_postfix}" "jbr" $JSDK_MODS_DIR "$modules" || do_exit $?
+
+# create sdk image bundle
+modules=$(cat ${JSDK}/release | grep MODULES | sed s/MODULES=//g | sed s/' '/','/g | sed s/\"//g | sed s/\\r//g | sed s/\\n//g)
+if [ "$bundle_type" == "jcef" ] || [ "$bundle_type" == "dcevm" ] || [ "$bundle_type" == "fd" ] || [ "$bundle_type" == "$JBRSDK_BUNDLE" ]; then
+  modules=${modules},$(get_mods_list "$JCEF_PATH"/jmods)
+fi
+create_image_bundle "$JBRSDK_BUNDLE${jbr_name_postfix}" "$JBRSDK_BUNDLE" "$JSDK_MODS_DIR" "$modules" || do_exit $?
+
+do_exit 0
--- a/jb/project/tools/windows/scripts/mkimages_x86.sh
+++ b/jb/project/tools/windows/scripts/mkimages_x86.sh
@@ -0,0 +1,62 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies the current version of OpenJDK e.g. 11_0_6
+#   JDK_BUILD_NUMBER - specifies the number of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+
+JBSDK_VERSION_WITH_DOTS=$(echo $JBSDK_VERSION | sed 's/_/\./g')
+
+source jb/project/tools/common/scripts/common.sh
+
+JBRSDK_BASE_NAME=jbrsdk-${JBSDK_VERSION}
+WORK_DIR=$(pwd)
+
+[ -z "$bundle_type" ] && (git apply -p0 < jb/project/tools/patches/exclude_jcef_module.patch || exit $?)
+
+PATH="/usr/local/bin:/usr/bin:${PATH}"
+./configure \
+  --with-target-bits=32 \
+  --with-vendor-name="${VENDOR_NAME}" \
+  --with-vendor-version-string="${VENDOR_VERSION_STRING}" \
+  --with-version-pre= \
+  --with-version-build=${JDK_BUILD_NUMBER} \
+  --with-version-opt=b${build_number} \
+  --with-toolchain-version=${TOOLCHAIN_VERSION} \
+  --with-boot-jdk=${BOOT_JDK} \
+  --disable-ccache \
+  --enable-cds=yes || exit 1
+make clean CONF=windows-x86-server-release || exit 1
+make LOG=info images CONF=windows-x86-server-release test-image || exit 1
+
+JBSDK=${JBRSDK_BASE_NAME}-windows-x86-b${build_number}
+BASE_DIR=build/windows-x86-server-release/images
+JSDK=${BASE_DIR}/jdk
+JBRSDK_BUNDLE=jbrsdk
+
+rm -rf ${BASE_DIR}/${JBRSDK_BUNDLE} && rsync -a --exclude demo --exclude sample ${JSDK}/ ${JBRSDK_BUNDLE} || exit 1
+sed 's/JBR/JBRSDK/g' ${JSDK}/release > release
+mv release ${JBRSDK_BUNDLE}/release
+
+JBR_BUNDLE=jbr
+rm -rf ${JBR_BUNDLE}
+grep -v javafx modules.list | grep -v "jdk.internal.vm\|jdk.aot\|jcef" > modules.list.x86
+${JSDK}/bin/jlink \
+  --module-path ${JSDK}/jmods --no-man-pages --compress=2 \
+  --add-modules $(xargs < modules.list.x86 | sed s/" "//g) --output ${JBR_BUNDLE} || exit $?
+
+echo Modifying release info ...
+#grep -v \"^JAVA_VERSION\" ${JSDK}/release | grep -v \"^MODULES\" >> ${JBR_BUNDLE}/release
--- a/jb/project/tools/windows/scripts/pack_x64.sh
+++ b/jb/project/tools/windows/scripts/pack_x64.sh
@@ -0,0 +1,58 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies major version of OpenJDK e.g. 11_0_6 (instead of dots '.' underbars "_" are used)
+#   JDK_BUILD_NUMBER - specifies udate release of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#   bundle_type      - specifies bundle to be built; possible values:
+#                        <empty> or nomod - the bundles without any additional modules (jcef)
+#                        jcef - the bundles with jcef
+#                        fd - the fastdebug bundles which also include the jcef module
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+
+source jb/project/tools/common/scripts/common.sh
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+bundle_type=$4
+
+function pack_jbr {
+  __bundle_name=$1
+  __arch_name=$2
+
+  [ "$bundle_type" == "fd" ] && [ "$__arch_name" == "$JBRSDK_BUNDLE" ] && __bundle_name=$__arch_name && fastdebug_infix="fastdebug-"
+  JBR=${__bundle_name}-${JBSDK_VERSION}-windows-x64-${fastdebug_infix}b${build_number}
+  echo Creating $JBR.tar.gz ...
+
+  /usr/bin/tar -czf $JBR.tar.gz -C $BASE_DIR $__bundle_name || do_exit $?
+}
+
+[ "$bundle_type" == "nomod" ] && bundle_type=""
+
+JBRSDK_BUNDLE=jbrsdk
+RELEASE_NAME=windows-x86_64-server-release
+IMAGES_DIR=build/$RELEASE_NAME/images
+JBSDK=$JBRSDK_BASE_NAME-windows-x64-b$build_number
+BASE_DIR=.
+
+if [ "$bundle_type" == "jcef" ] || [ "$bundle_type" == "dcevm" ] || [ "$bundle_type" == "fd" ]; then
+  jbr_name_postfix="_${bundle_type}"
+fi
+
+pack_jbr jbr${jbr_name_postfix}
+pack_jbr jbrsdk${jbr_name_postfix}
+
+if [ -z "$bundle_type" ]; then
+  JBRSDK_TEST=$JBRSDK_BASE_NAME-windows-test-x64-b$build_number
+  echo Creating $JBRSDK_TEST.tar.gz ...
+  /usr/bin/tar -czf $JBRSDK_TEST.tar.gz -C $IMAGES_DIR --exclude='test/jdk/demos' test || do_exit $?
+fi
--- a/jb/project/tools/windows/scripts/pack_x86.sh
+++ b/jb/project/tools/windows/scripts/pack_x86.sh
@@ -0,0 +1,42 @@
+#!/bin/bash -x
+
+# The following parameters must be specified:
+#   JBSDK_VERSION    - specifies the current version of OpenJDK e.g. 11_0_6
+#   JDK_BUILD_NUMBER - specifies the number of OpenJDK build or the value of --with-version-build argument to configure
+#   build_number     - specifies the number of JetBrainsRuntime build
+#
+# jbrsdk-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+# jbr-${JBSDK_VERSION}-osx-x64-b${build_number}.tar.gz
+#
+# $ ./java --version
+# openjdk 11.0.6 2020-01-14
+# OpenJDK Runtime Environment (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number})
+# OpenJDK 64-Bit Server VM (build 11.0.6+${JDK_BUILD_NUMBER}-b${build_number}, mixed mode)
+#
+
+JBSDK_VERSION=$1
+JDK_BUILD_NUMBER=$2
+build_number=$3
+
+JBRSDK_BASE_NAME=jbrsdk-$JBSDK_VERSION
+JBR_BASE_NAME=jbr-$JBSDK_VERSION
+
+IMAGES_DIR=build/windows-x86-server-release/images
+JSDK=$IMAGES_DIR/jdk
+JBSDK=$JBRSDK_BASE_NAME-windows-x86-b$build_number
+BASE_DIR=.
+
+JBRSDK_BUNDLE=jbrsdk
+echo Creating $JBSDK.tar.gz ...
+/usr/bin/tar -czf $JBSDK.tar.gz $JBRSDK_BUNDLE || exit 1
+
+JBR_BUNDLE=jbr
+JBR_BASE_NAME=jbr-${JBSDK_VERSION}
+
+JBR=$JBR_BASE_NAME-windows-x86-b$build_number
+echo Creating $JBR.tar.gz ...
+/usr/bin/tar -czf $JBR.tar.gz -C $BASE_DIR ${JBR_BUNDLE} || exit 1
+
+JBRSDK_TEST=$JBRSDK_BASE_NAME-windows-test-x86-b$build_number
+echo Creating $JBRSDK_TEST.tar.gz ...
+/usr/bin/tar -czf $JBRSDK_TEST.tar.gz -C $IMAGES_DIR --exclude='test/jdk/demos' test || exit 1
--- a/make/CompileInterimLangtools.gmk
+++ b/make/CompileInterimLangtools.gmk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2014, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -49,8 +49,9 @@ TARGETS += $(patsubst %, $(BUILDTOOLS_OUTPUTDIR)/gensrc/%/module-info.java, \
    $(INTERIM_LANGTOOLS_MODULES))

 $(eval $(call SetupCopyFiles, COPY_PREVIEW_FEATURES, \
-    FILES := $(TOPDIR)/src/java.base/share/classes/jdk/internal/PreviewFeature.java, \
-    DEST := $(BUILDTOOLS_OUTPUTDIR)/gensrc/java.base.interim/jdk/internal/, \
+    FILES := $(TOPDIR)/src/java.base/share/classes/jdk/internal/javac/PreviewFeature.java \
+        $(TOPDIR)/src/java.base/share/classes/jdk/internal/javac/NoPreview.java, \
+    DEST := $(BUILDTOOLS_OUTPUTDIR)/gensrc/java.base.interim/jdk/internal/javac/, \
 ))

 TARGETS += $(COPY_PREVIEW_FEATURES)
@@ -81,8 +82,8 @@ define SetupInterimModule
          --module-path $(BUILDTOOLS_OUTPUTDIR)/interim_langtools_modules \
          $$(INTERIM_LANGTOOLS_ADD_EXPORTS) \
          --patch-module java.base=$(BUILDTOOLS_OUTPUTDIR)/gensrc/java.base.interim \
-          --add-exports java.base/jdk.internal=java.compiler.interim \
-          --add-exports java.base/jdk.internal=jdk.compiler.interim, \
+          --add-exports java.base/jdk.internal.javac=java.compiler.interim \
+          --add-exports java.base/jdk.internal.javac=jdk.compiler.interim, \
  ))

  $1_DEPS_INTERIM := $$(addsuffix .interim, $$(filter \
--- a/make/CompileJavaModules.gmk
+++ b/make/CompileJavaModules.gmk
@@ -31,516 +31,6 @@ include MakeBase.gmk
 include Modules.gmk
 include JavaCompilation.gmk

-# Hook to include the corresponding custom file, if present.
-$(eval $(call IncludeCustomExtension, CompileJavaModules.gmk))
-
-################################################################################
-# Module specific build settings
-
-java.base_DOCLINT += -Xdoclint:all/protected,-reference,-accessibility \
-    '-Xdoclint/package:java.*,javax.*'
-java.base_JAVAC_FLAGS += -XDstringConcat=inline
-java.base_COPY += .icu .dat .spp .nrm content-types.properties \
-    hijrah-config-Hijrah-umalqura_islamic-umalqura.properties
-java.base_CLEAN += intrinsic.properties
-
-java.base_EXCLUDE_FILES += \
-  $(TOPDIR)/src/java.base/share/classes/jdk/internal/module/ModuleLoaderMap.java
-
-java.base_EXCLUDES += java/lang/doc-files
-
-# Exclude BreakIterator classes that are just used in compile process to generate
-# data files and shouldn't go in the product
-java.base_EXCLUDE_FILES += sun/text/resources/BreakIteratorRules.java
-
-ifeq ($(call isTargetOs, macosx aix), false)
-  java.base_EXCLUDE_FILES += sun/nio/fs/PollingWatchService.java
-endif
-
-ifeq ($(call isTargetOs, windows), true)
-  java.base_EXCLUDE_FILES += \
-      sun/nio/ch/SimpleAsynchronousFileChannelImpl.java \
-      #
-endif
-
-################################################################################
-
-java.compiler_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.datatransfer_DOCLINT += -Xdoclint:all/protected,-reference \
-    '-Xdoclint/package:java.*,javax.*'
-java.datatransfer_COPY += flavormap.properties
-
-################################################################################
-
-java.desktop_DOCLINT += -Xdoclint:all/protected,-reference \
-    '-Xdoclint/package:java.*,javax.*'
-java.desktop_COPY += .gif .png .wav .txt .xml .css .pf
-java.desktop_CLEAN += iio-plugin.properties cursors.properties
-
-java.desktop_EXCLUDES += \
-    java/awt/doc-files \
-    javax/swing/doc-files \
-    javax/swing/text/doc-files \
-    javax/swing/plaf/synth/doc-files \
-    javax/swing/undo/doc-files \
-    sun/awt/X11/doc-files \
-    #
-
-java.desktop_EXCLUDE_FILES += \
-    javax/swing/plaf/nimbus/InternalFrameTitlePanePainter.java \
-    javax/swing/plaf/nimbus/OptionPaneMessageAreaPainter.java \
-    javax/swing/plaf/nimbus/ScrollBarPainter.java \
-    javax/swing/plaf/nimbus/SliderPainter.java \
-    javax/swing/plaf/nimbus/SpinnerPainter.java \
-    javax/swing/plaf/nimbus/SplitPanePainter.java \
-    javax/swing/plaf/nimbus/TabbedPanePainter.java \
-    sun/awt/resources/security-icon-bw16.png \
-    sun/awt/resources/security-icon-bw24.png \
-    sun/awt/resources/security-icon-bw32.png \
-    sun/awt/resources/security-icon-bw48.png \
-    sun/awt/resources/security-icon-interim16.png \
-    sun/awt/resources/security-icon-interim24.png \
-    sun/awt/resources/security-icon-interim32.png \
-    sun/awt/resources/security-icon-interim48.png \
-    sun/awt/resources/security-icon-yellow16.png \
-    sun/awt/resources/security-icon-yellow24.png \
-    sun/awt/resources/security-icon-yellow32.png \
-    sun/awt/resources/security-icon-yellow48.png \
-    sun/awt/X11/java-icon16.png \
-    sun/awt/X11/java-icon24.png \
-    sun/awt/X11/java-icon32.png \
-    sun/awt/X11/java-icon48.png \
-    .template \
-    #
-
-ifeq ($(call isTargetOs, macosx), true)
-  # exclude all X11 on Mac.
-  java.desktop_EXCLUDES += \
-      sun/awt/X11 \
-      sun/java2d/x11 \
-      sun/java2d/jules \
-      sun/java2d/xr \
-      com/sun/java/swing/plaf/gtk \
-      #
-  java.desktop_EXCLUDE_FILES += \
-      $(wildcard $(TOPDIR)/src/java.desktop/unix/classes/sun/java2d/*.java) \
-      $(wildcard $(TOPDIR)/src/java.desktop/unix/classes/sun/java2d/opengl/*.java) \
-      $(wildcard $(TOPDIR)/src/java.desktop/unix/classes/sun/awt/*.java) \
-      $(wildcard $(TOPDIR)/src/java.desktop/unix/classes/sun/font/*.java) \
-      #
-else
-  # TBD: figure out how to eliminate this long list
-  java.desktop_EXCLUDE_FILES += \
-      sun/awt/X11/ScreenFormat.java \
-      sun/awt/X11/XArc.java \
-      sun/awt/X11/XChar2b.java \
-      sun/awt/X11/XCharStruct.java \
-      sun/awt/X11/XClassHint.java \
-      sun/awt/X11/XComposeStatus.java \
-      sun/awt/X11/XExtCodes.java \
-      sun/awt/X11/XFontProp.java \
-      sun/awt/X11/XFontSetExtents.java \
-      sun/awt/X11/XFontStruct.java \
-      sun/awt/X11/XGCValues.java \
-      sun/awt/X11/XHostAddress.java \
-      sun/awt/X11/XIMCallback.java \
-      sun/awt/X11/XIMHotKeyTrigger.java \
-      sun/awt/X11/XIMHotKeyTriggers.java \
-      sun/awt/X11/XIMPreeditCaretCallbackStruct.java \
-      sun/awt/X11/XIMPreeditDrawCallbackStruct.java \
-      sun/awt/X11/XIMPreeditStateNotifyCallbackStruct.java \
-      sun/awt/X11/XIMStatusDrawCallbackStruct.java \
-      sun/awt/X11/XIMStringConversionCallbackStruct.java \
-      sun/awt/X11/XIMStringConversionText.java \
-      sun/awt/X11/XIMStyles.java \
-      sun/awt/X11/XIMText.java \
-      sun/awt/X11/XIMValuesList.java \
-      sun/awt/X11/XImage.java \
-      sun/awt/X11/XKeyboardControl.java \
-      sun/awt/X11/XKeyboardState.java \
-      sun/awt/X11/XOMCharSetList.java \
-      sun/awt/X11/XOMFontInfo.java \
-      sun/awt/X11/XOMOrientation.java \
-      sun/awt/X11/XPoint.java \
-      sun/awt/X11/XRectangle.java \
-      sun/awt/X11/XSegment.java \
-      sun/awt/X11/XStandardColormap.java \
-      sun/awt/X11/XTextItem.java \
-      sun/awt/X11/XTextItem16.java \
-      sun/awt/X11/XTextProperty.java \
-      sun/awt/X11/XTimeCoord.java \
-      sun/awt/X11/XWindowChanges.java \
-      sun/awt/X11/XdbeSwapInfo.java \
-      sun/awt/X11/XmbTextItem.java \
-      sun/awt/X11/XwcTextItem.java
-endif
-
-ifeq ($(call isTargetOs, windows), true)
-  java.desktop_EXCLUDES += com/sun/java/swing/plaf/gtk
-endif
-
-ifeq ($(call isTargetOs, windows macosx), false)
-  java.desktop_EXCLUDE_FILES += sun/awt/AWTCharset.java
-endif
-
-# These files do not appear in the build result of the old build. This
-# is because they are generated sources, but the AUTO_JAVA_FILES won't
-# pick them up since they aren't generated when the source dirs are
-# searched and they aren't referenced by any other classes so they won't
-# be picked up by implicit compilation. On a rebuild, they are picked up
-# and compiled. Exclude them here to produce the same rt.jar as the old
-# build does when building just once.
-java.desktop_EXCLUDE_FILES += \
-    javax/swing/plaf/nimbus/InternalFrameTitlePanePainter.java \
-    javax/swing/plaf/nimbus/OptionPaneMessageAreaPainter.java \
-    javax/swing/plaf/nimbus/ScrollBarPainter.java \
-    javax/swing/plaf/nimbus/SliderPainter.java \
-    javax/swing/plaf/nimbus/SpinnerPainter.java \
-    javax/swing/plaf/nimbus/SplitPanePainter.java \
-    javax/swing/plaf/nimbus/TabbedPanePainter.java \
-    #
-
-################################################################################
-
-java.scripting_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:java.*,javax.*'
-java.scripting_COPY += .js
-java.scripting_CLEAN += .properties
-
-################################################################################
-
-java.instrument_DOCLINT += -Xdoclint:all/protected,-accessibility \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.logging_DOCLINT += -Xdoclint:all/protected,-reference,-accessibility \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.management_DOCLINT += -Xdoclint:all/protected,-reference,-accessibility \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.management.rmi_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:javax.*'
-
-################################################################################
-
-java.prefs_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.transaction.xa_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:javax.*'
-
-################################################################################
-
-java.sql_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.sql.rowset_DOCLINT += -Xdoclint:all/protected,-accessibility \
-    '-Xdoclint/package:java.*,javax.*'
-java.sql.rowset_CLEAN_FILES += $(wildcard \
-    $(TOPDIR)/src/java.sql.rowset/share/classes/com/sun/rowset/*.properties \
-    $(TOPDIR)/src/java.sql.rowset/share/classes/javax/sql/rowset/*.properties)
-
-################################################################################
-
-java.rmi_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:java.*,javax.*'
-java.rmi_CLEAN_FILES += $(wildcard \
-    $(TOPDIR)/src/java.rmi/share/classes/sun/rmi/registry/resources/*.properties \
-    $(TOPDIR)/src/java.rmi/share/classes/sun/rmi/server/resources/*.properties)
-
-################################################################################
-
-java.xml_DOCLINT += -Xdoclint:all/protected,-accessibility \
-    '-Xdoclint/package:$(call CommaList, javax.xml.catalog javax.xml.datatype \
-    javax.xml.transform javax.xml.validation javax.xml.xpath)'
-java.xml_CLEAN += .properties
-
-################################################################################
-
-java.naming_DOCLINT += -Xdoclint:all/protected,-accessibility \
-    '-Xdoclint/package:java.*,javax.*'
-java.naming_CLEAN += jndiprovider.properties
-
-################################################################################
-
-java.security.jgss_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.smartcardio_DOCLINT += -Xdoclint:all/protected,-accessibility \
-    '-Xdoclint/package:java.*,javax.*'
-
-################################################################################
-
-java.xml.crypto_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:java.*,javax.*'
-java.xml.crypto_COPY += .dtd .xml
-java.xml.crypto_CLEAN += .properties
-
-################################################################################
-
-jdk.charsets_COPY += .dat
-
-################################################################################
-
-################################################################################
-
-jdk.compiler_DOCLINT += -Xdoclint:all/protected \
-    '-Xdoclint/package:-com.sun.tools.*,-jdk.internal.*,sun.tools.serialver.resources.*'
-jdk.compiler_JAVAC_FLAGS += -XDstringConcat=inline
-jdk.compiler_CLEAN_FILES += $(wildcard \
-    $(patsubst %, $(TOPDIR)/src/jdk.compiler/share/classes/%/*.properties, \
-        sun/tools/serialver/resources))
-
-################################################################################
-
-jdk.hotspot.agent_DISABLED_WARNINGS += rawtypes serial cast static overrides \
-    fallthrough
-jdk.hotspot.agent_COPY += .gif .png .properties
-
-################################################################################
-
-jdk.editpad_COPY += .properties
-
-################################################################################
-
-jdk.jshell_COPY += .jsh .properties
-
-################################################################################
-
-jdk.internal.le_COPY += .properties .caps .txt
-
-################################################################################
-
-jdk.internal.opt_COPY += .properties
-
-################################################################################
-
-jdk.jcmd_COPY += _options
-
-################################################################################
-
-jdk.dynalink_CLEAN += .properties
-
-################################################################################
-
-jdk.javadoc_COPY += .xml .css .js .js.template .png .txt
-
-################################################################################
-
-jdk.jartool_DISABLED_WARNINGS += missing-explicit-ctor
-jdk.jartool_JAVAC_FLAGS += -XDstringConcat=inline
-
-################################################################################
-
-jdk.httpserver_DISABLED_WARNINGS += missing-explicit-ctor
-
-################################################################################
-
-jdk.unsupported.desktop_DISABLED_WARNINGS += missing-explicit-ctor
-
-################################################################################
-
-# No SCTP implementation on Mac OS X or AIX. These classes should be excluded.
-SCTP_IMPL_CLASSES = \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/AssociationChange.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/AssociationImpl.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/PeerAddrChange.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/ResultContainer.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/SctpChannelImpl.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/SctpMultiChannelImpl.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/SctpNet.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/SctpNotification.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/SctpServerChannelImpl.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/SendFailed.java \
-    $(TOPDIR)/src/jdk.sctp/unix/classes/sun/nio/ch/sctp/Shutdown.java
-
-ifeq ($(call isTargetOs, macosx), true)
-  jdk.sctp_EXCLUDE_FILES += $(SCTP_IMPL_CLASSES)
-endif
-
-ifeq ($(call isTargetOs, aix), true)
-  jdk.sctp_EXCLUDE_FILES += $(SCTP_IMPL_CLASSES)
-endif
-
-################################################################################
-
-jdk.jpackage_COPY += .gif .png .txt .spec .script .prerm .preinst \
-    .postrm .postinst .list .sh .desktop .copyright .control .plist .template \
-    .icns .scpt .wxs .wxl .wxi .ico .bmp .tiff
-
-jdk.jpackage_CLEAN += .properties
-
-################################################################################
-
-jdk.jconsole_COPY += .gif .png
-
-jdk.jconsole_CLEAN_FILES += $(wildcard \
-    $(TOPDIR)/src/jdk.jconsole/share/classes/sun/tools/jconsole/resources/*.properties)
-
-################################################################################
-
-jdk.jdeps_COPY += .txt
-
-jdk.jdeps_CLEAN_FILES += $(wildcard \
-    $(TOPDIR)/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/resources/*.properties \
-    $(TOPDIR)/src/jdk.jdeps/share/classes/com/sun/tools/javap/resources/*.properties)
-
-################################################################################
-
-jdk.jdi_EXCLUDES += \
-    com/sun/tools/example/debug/bdi \
-    com/sun/tools/example/debug/event \
-    com/sun/tools/example/debug/gui \
-    com/sun/jdi/doc-files \
-    #
-
-jdk.jdi_EXCLUDE_FILES += jdi-overview.html
-
-################################################################################
-
-jdk.dev_CLEAN_FILES += $(wildcard \
-    $(patsubst %, $(TOPDIR)/src/jdk.dev/share/classes/%/*.properties, \
-        com/sun/tools/script/shell))
-
-jdk.dev_COPY += .js oqlhelp.html .txt
-
-################################################################################
-
-jdk.internal.jvmstat_COPY += aliasmap
-
-################################################################################
-
-# -parameters provides method's parameters information in class file,
-# JVMCI compilers make use of that information for various sanity checks.
-# Don't use Indy strings concatenation to have good JVMCI startup performance.
-# The exports are needed since JVMCI is dynamically exported (see
-# jdk.vm.ci.services.internal.ReflectionAccessJDK::openJVMCITo).
-
-jdk.internal.vm.ci_JAVAC_FLAGS += -parameters -XDstringConcat=inline
-
-################################################################################
-
-jdk.internal.vm.compiler_JAVAC_FLAGS += -parameters -XDstringConcat=inline \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.aarch64=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.amd64=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.code=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.code.site=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.code.stack=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.common=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.hotspot=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.hotspot.aarch64=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.hotspot.amd64=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.meta=jdk.internal.vm.compiler \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.runtime=jdk.internal.vm.compiler \
-    #
-
-jdk.internal.vm.compiler_EXCLUDES += \
-    jdk.internal.vm.compiler.collections.test \
-    jdk.tools.jaotc.test \
-    org.graalvm.compiler.api.directives.test \
-    org.graalvm.compiler.api.test \
-    org.graalvm.compiler.asm.aarch64.test \
-    org.graalvm.compiler.asm.amd64.test \
-    org.graalvm.compiler.asm.test \
-    org.graalvm.compiler.core.aarch64.test \
-    org.graalvm.compiler.core.amd64.test \
-    org.graalvm.compiler.core.jdk9.test \
-    org.graalvm.compiler.core.match.processor \
-    org.graalvm.compiler.core.test \
-    org.graalvm.compiler.debug.test \
-    org.graalvm.compiler.graph.test \
-    org.graalvm.compiler.hotspot.aarch64.test \
-    org.graalvm.compiler.hotspot.amd64.test \
-    org.graalvm.compiler.hotspot.jdk15.test \
-    org.graalvm.compiler.hotspot.jdk9.test \
-    org.graalvm.compiler.hotspot.lir.test \
-    org.graalvm.compiler.hotspot.test \
-    org.graalvm.compiler.jtt \
-    org.graalvm.compiler.lir.jtt \
-    org.graalvm.compiler.lir.test \
-    org.graalvm.compiler.loop.test \
-    org.graalvm.compiler.microbenchmarks \
-    org.graalvm.compiler.nodeinfo.processor \
-    org.graalvm.compiler.nodes.test \
-    org.graalvm.compiler.options.processor \
-    org.graalvm.compiler.options.test \
-    org.graalvm.compiler.phases.common.test \
-    org.graalvm.compiler.processor \
-    org.graalvm.compiler.replacements.jdk10.test \
-    org.graalvm.compiler.replacements.jdk12.test \
-    org.graalvm.compiler.replacements.jdk9.test \
-    org.graalvm.compiler.replacements.processor \
-    org.graalvm.compiler.replacements.test \
-    org.graalvm.compiler.serviceprovider.processor \
-    org.graalvm.compiler.test \
-    org.graalvm.compiler.virtual.bench \
-    org.graalvm.micro.benchmarks \
-    org.graalvm.util.test \
-    #
-
-################################################################################
-
-# -parameters provides method's parameters information in class file,
-# JVMCI compilers make use of that information for various sanity checks.
-# Don't use Indy strings concatenation to have good JAOTC startup performance.
-# The exports are needed since JVMCI is dynamically exported (see
-# jdk.vm.ci.services.internal.ReflectionAccessJDK::openJVMCITo).
-
-jdk.aot_JAVAC_FLAGS += -parameters -XDstringConcat=inline \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.aarch64=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.amd64=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.code=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.code.site=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.code.stack=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.common=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.hotspot=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.hotspot.aarch64=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.hotspot.amd64=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.meta=jdk.internal.vm.compiler,jdk.aot \
-    --add-exports jdk.internal.vm.ci/jdk.vm.ci.runtime=jdk.internal.vm.compiler,jdk.aot \
-    #
-
-jdk.aot_EXCLUDES += \
-    jdk.tools.jaotc.test
-    #
-
-################################################################################
-
-sun.charsets_COPY += .dat
-
-################################################################################
-
-jdk.localedata_COPY += _dict _th
-# Exclude BreakIterator classes that are just used in compile process to generate
-# data files and shouldn't go in the product
-jdk.localedata_EXCLUDE_FILES += sun/text/resources/ext/BreakIteratorRules_th.java
-jdk.localedata_KEEP_ALL_TRANSLATIONS := true
-################################################################################
-
-jdk.jfr_DISABLED_WARNINGS += exports
-jdk.jfr_COPY := .xsd .xml .dtd
-jdk.jfr_JAVAC_FLAGS := -XDstringConcat=inline
-
-################################################################################
-
-jdk.incubator.vector_DOCLINT += -Xdoclint:all/protected
-
 ################################################################################
 # If this is an imported module that has prebuilt classes, only compile
 # module-info.java.
@@ -577,60 +67,8 @@ MODULESOURCEPATH := $(call GetModuleSrcPath)
 # Add imported modules to the modulepath
 MODULEPATH := $(call PathList, $(IMPORT_MODULES_CLASSES))

-ifeq ($(MODULE), jdk.internal.vm.ci)
-  ## WORKAROUND jdk.internal.vm.ci source structure issue
-  JVMCI_MODULESOURCEPATH := $(MODULESOURCEPATH) \
-      $(subst /$(MODULE)/,/*/, $(filter-out %processor/src, \
-          $(wildcard $(TOPDIR)/src/$(MODULE)/share/classes/*/src)))
-  MODULESOURCEPATH := $(call PathList, $(JVMCI_MODULESOURCEPATH))
-endif
-
-ifeq ($(MODULE), jdk.internal.vm.compiler)
-  ## WORKAROUND jdk.internal.vm.compiler source structure issue
-  VM_COMPILER_MODULESOURCEPATH := $(MODULESOURCEPATH) \
-      $(subst /$(MODULE)/,/*/, $(filter-out %processor/src %test/src %jtt/src %bench/src %microbenchmarks/src, \
-          $(wildcard $(TOPDIR)/src/$(MODULE)/share/classes/*/src)))
-  MODULESOURCEPATH := $(call PathList, $(VM_COMPILER_MODULESOURCEPATH))
-endif
-
-ifeq ($(MODULE), jdk.aot)
-  ## WORKAROUND jdk.aot source structure issue
-  AOT_MODULESOURCEPATH := $(MODULESOURCEPATH) \
-      $(subst /$(MODULE)/,/*/, $(filter-out %processor/src, \
-          $(wildcard $(TOPDIR)/src/$(MODULE)/share/classes/*/src)))
-  MODULESOURCEPATH := $(call PathList, $(AOT_MODULESOURCEPATH))
-endif
-
-$(eval $(call SetupJavaCompilation, $(MODULE), \
-    SMALL_JAVA := false, \
-    MODULE := $(MODULE), \
-    SRC := $(wildcard $(MODULE_SRC_DIRS)), \
-    INCLUDES := $(JDK_USER_DEFINED_FILTER), \
-    FAIL_NO_SRC := $(FAIL_NO_SRC), \
-    BIN := $(if $($(MODULE)_BIN), $($(MODULE)_BIN), $(JDK_OUTPUTDIR)/modules), \
-    HEADERS := $(SUPPORT_OUTPUTDIR)/headers, \
-    CREATE_API_DIGEST := true, \
-    JAVAC_FLAGS := \
-        $($(MODULE)_DOCLINT) \
-        $($(MODULE)_JAVAC_FLAGS) \
-        --module-source-path $(MODULESOURCEPATH) \
-        --module-path $(MODULEPATH) \
-        --system none, \
-))
-
-TARGETS += $($(MODULE)) $($(MODULE)_COPY_EXTRA)
-
-# Declare dependencies between java compilations of different modules.
-# Since the other modules are declared in different invocations of this file,
-# use the macro to find the correct target file to depend on.
-# Only the javac compilation actually depends on other modules so limit
-# dependency declaration to that by using the *_COMPILE_TARGET variable.
-$($(MODULE)_COMPILE_TARGET): $(foreach d, $(call FindDepsForModule, $(MODULE)), \
-    $(call SetupJavaCompilationApiTarget, $d, \
-        $(if $($d_BIN), $($d_BIN), $(JDK_OUTPUTDIR)/modules/$d)))
-
 ################################################################################
-# Copy zh_HK properties files from zh_TW
+# Copy zh_HK properties files from zh_TW (needed by some modules)

 $(JDK_OUTPUTDIR)/modules/%_zh_HK.properties: $(JDK_OUTPUTDIR)/modules/%_zh_TW.properties
 	$(install-file)
@@ -645,13 +83,48 @@ CreateHkTargets = \
       .properties \
    )

-ifeq ($(MODULE), java.sql.rowset)
-  TARGETS += $(call CreateHkTargets, $(java.sql.rowset_CLEAN_FILES))
-endif
+################################################################################
+# Include module specific build settings

-ifeq ($(MODULE), java.rmi)
-  TARGETS += $(call CreateHkTargets, $(java.rmi_CLEAN_FILES))
-endif
+-include Java.gmk
+
+################################################################################
+# Setup the main compilation
+
+$(eval $(call SetupJavaCompilation, $(MODULE), \
+    SMALL_JAVA := false, \
+    MODULE := $(MODULE), \
+    SRC := $(wildcard $(MODULE_SRC_DIRS)), \
+    INCLUDES := $(JDK_USER_DEFINED_FILTER), \
+    FAIL_NO_SRC := $(FAIL_NO_SRC), \
+    BIN := $(if $($(MODULE)_BIN), $($(MODULE)_BIN), $(JDK_OUTPUTDIR)/modules), \
+    HEADERS := $(SUPPORT_OUTPUTDIR)/headers, \
+    CREATE_API_DIGEST := true, \
+    CLEAN := $(CLEAN), \
+    CLEAN_FILES := $(CLEAN_FILES), \
+    COPY := $(COPY), \
+    DISABLED_WARNINGS := $(DISABLED_WARNINGS_java), \
+    EXCLUDES := $(EXCLUDES), \
+    EXCLUDE_FILES := $(EXCLUDE_FILES), \
+    KEEP_ALL_TRANSLATIONS := $(KEEP_ALL_TRANSLATIONS), \
+    JAVAC_FLAGS := \
+        $(DOCLINT) \
+        $(JAVAC_FLAGS) \
+        --module-source-path $(MODULESOURCEPATH) \
+        --module-path $(MODULEPATH) \
+        --system none, \
+))
+
+TARGETS += $($(MODULE))
+
+# Declare dependencies between java compilations of different modules.
+# Since the other modules are declared in different invocations of this file,
+# use the macro to find the correct target file to depend on.
+# Only the javac compilation actually depends on other modules so limit
+# dependency declaration to that by using the *_COMPILE_TARGET variable.
+$($(MODULE)_COMPILE_TARGET): $(foreach d, $(call FindDepsForModule, $(MODULE)), \
+    $(call SetupJavaCompilationApiTarget, $d, \
+        $(if $($d_BIN), $($d_BIN), $(JDK_OUTPUTDIR)/modules/$d)))

 ################################################################################
 # If this is an imported module, copy the pre built classes and resources into
@@ -675,10 +148,6 @@ endif

 ################################################################################

-$(eval $(call IncludeCustomExtension, CompileJavaModules-post.gmk))
-
-################################################################################
-
 all: $(TARGETS)

 .PHONY: all
--- a/make/CompileToolsHotspot.gmk
+++ b/make/CompileToolsHotspot.gmk
@@ -52,94 +52,6 @@ $(eval $(call SetupJavaCompilation, BUILD_TOOLS_HOTSPOT, \
 TARGETS += $(BUILD_TOOLS_HOTSPOT)


-################################################################################
-# Graal build tools
-ifeq ($(INCLUDE_GRAAL), true)
-  VM_CI_SRC_DIR := $(TOPDIR)/src/jdk.internal.vm.ci/share/classes
-
-  SRC_DIR := $(TOPDIR)/src/jdk.internal.vm.compiler/share/classes
-
-  ##############################################################################
-  # Compile the annotation processors
-  $(eval $(call SetupJavaCompilation, BUILD_VM_COMPILER_MATCH_PROCESSOR, \
-      TARGET_RELEASE := $(TARGET_RELEASE_BOOTJDK), \
-      SRC := \
-          $(SRC_DIR)/org.graalvm.compiler.processor/src \
-          $(SRC_DIR)/org.graalvm.compiler.core.match.processor/src \
-          , \
-      EXCLUDE_FILES := $(EXCLUDE_FILES), \
-      BIN := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.match.processor, \
-      JAR := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.match.processor.jar, \
-      DISABLED_WARNINGS := options, \
-  ))
-
-  TARGETS += $(BUILD_VM_COMPILER_MATCH_PROCESSOR)
-
-  ##############################################################################
-
-  $(eval $(call SetupJavaCompilation, BUILD_VM_COMPILER_NODEINFO_PROCESSOR, \
-      TARGET_RELEASE := $(TARGET_RELEASE_BOOTJDK), \
-      SRC := \
-          $(SRC_DIR)/org.graalvm.compiler.processor/src \
-          $(SRC_DIR)/org.graalvm.compiler.nodeinfo.processor/src \
-          , \
-      BIN := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.nodeinfo.processor, \
-      JAR := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.nodeinfo.processor.jar, \
-      DISABLED_WARNINGS := options, \
-  ))
-
-  TARGETS += $(BUILD_VM_COMPILER_NODEINFO_PROCESSOR)
-
-  ##############################################################################
-
-  $(eval $(call SetupJavaCompilation, BUILD_VM_COMPILER_OPTIONS_PROCESSOR, \
-      TARGET_RELEASE := $(TARGET_RELEASE_BOOTJDK), \
-      DISABLED_WARNINGS := options, \
-      SRC := \
-          $(SRC_DIR)/org.graalvm.compiler.processor/src \
-          $(SRC_DIR)/org.graalvm.compiler.options.processor/src \
-          , \
-      BIN := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.options.processor, \
-      JAR := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.options.processor.jar, \
-  ))
-
-  TARGETS += $(BUILD_VM_COMPILER_OPTIONS_PROCESSOR)
-
-  ##############################################################################
-
-  $(eval $(call SetupJavaCompilation, BUILD_VM_COMPILER_REPLACEMENTS_PROCESSOR, \
-      TARGET_RELEASE := $(TARGET_RELEASE_BOOTJDK), \
-      SRC := \
-          $(SRC_DIR)/org.graalvm.compiler.processor/src \
-          $(SRC_DIR)/org.graalvm.compiler.replacements.processor/src \
-          , \
-      EXCLUDE_FILES := $(EXCLUDE_FILES), \
-      BIN := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.replacements.verifier, \
-      JAR := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.replacements.verifier.jar, \
-      DISABLED_WARNINGS := options, \
-  ))
-
-  TARGETS += $(BUILD_VM_COMPILER_REPLACEMENTS_PROCESSOR)
-
-  ##############################################################################
-
-  $(eval $(call SetupJavaCompilation, BUILD_VM_COMPILER_SERVICEPROVIDER_PROCESSOR, \
-      TARGET_RELEASE := $(TARGET_RELEASE_BOOTJDK), \
-      SRC := \
-          $(SRC_DIR)/org.graalvm.compiler.processor/src \
-          $(SRC_DIR)/org.graalvm.compiler.serviceprovider.processor/src \
-          , \
-      EXCLUDE_FILES := $(EXCLUDE_FILES), \
-      BIN := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.serviceprovider.processor, \
-      JAR := $(BUILDTOOLS_OUTPUTDIR)/jdk.vm.compiler.serviceprovider.processor.jar, \
-      DISABLED_WARNINGS := options, \
-  ))
-
-  TARGETS += $(BUILD_VM_COMPILER_SERVICEPROVIDER_PROCESSOR)
-
-  ##############################################################################
-endif
-
 all: $(TARGETS)

 .PHONY: all
--- a/make/CreateJmods.gmk
+++ b/make/CreateJmods.gmk
@@ -213,12 +213,12 @@ endif

 ifeq ($(call isTargetOs, windows), true)
  ifeq ($(SHIP_DEBUG_SYMBOLS), )
-    JMOD_FLAGS += --exclude '**{_the.*,_*.marker,*.diz,*.pdb,*.map}'
+    JMOD_FLAGS += --exclude '**{_the.*,_*.marker*,*.diz,*.pdb,*.map}'
  else
-    JMOD_FLAGS += --exclude '**{_the.*,_*.marker,*.diz,*.map}'
+    JMOD_FLAGS += --exclude '**{_the.*,_*.marker*,*.diz,*.map}'
  endif
 else
-  JMOD_FLAGS += --exclude '**{_the.*,_*.marker,*.diz,*.debuginfo,*.dSYM/**,*.dSYM}'
+  JMOD_FLAGS += --exclude '**{_the.*,_*.marker*,*.diz,*.debuginfo,*.dSYM/**,*.dSYM}'
 endif

 # Create jmods in the support dir and then move them into place to keep the
--- a/make/Docs.gmk
+++ b/make/Docs.gmk
@@ -1,4 +1,4 @@
-# Copyright (c) 1997, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -57,14 +57,11 @@ $(eval $(call IncludeCustomExtension, Docs.gmk))
 ################################################################################
 # Javadoc settings

+# Include configuration for URLs in generated javadoc
+include $(TOPDIR)/make/conf/javadoc.conf
+
 MODULES_SOURCE_PATH := $(call PathList, $(call GetModuleSrcPath) )

-# URLs
-JAVADOC_BASE_URL := https://docs.oracle.com/pls/topic/lookup?ctx=javase$(VERSION_NUMBER)&amp;id=homepage
-BUG_SUBMIT_URL := https://bugreport.java.com/bugreport/
-COPYRIGHT_URL := legal/copyright.html
-LICENSE_URL := https://www.oracle.com/java/javase/terms/license/java$(VERSION_NUMBER)speclicense.html
-REDISTRIBUTION_URL := https://www.oracle.com/technetwork/java/redist-137594.html

 # In order to get a specific ordering it's necessary to specify the total
 # ordering of tags as the tags are otherwise ordered in order of definition.
@@ -92,7 +89,6 @@ JAVADOC_TAGS := \
    -tag see \
    -taglet build.tools.taglet.ExtLink \
    -taglet build.tools.taglet.Incubating \
-    -taglet build.tools.taglet.Preview \
    -tagletpath $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
    $(CUSTOM_JAVADOC_TAGS) \
    #
@@ -103,7 +99,8 @@ JAVADOC_TAGS := \
 REFERENCE_TAGS := $(JAVADOC_TAGS)

 # Which doclint checks to ignore
-JAVADOC_DISABLED_DOCLINT := accessibility html missing syntax reference
+JAVADOC_DISABLED_DOCLINT_WARNINGS := missing
+JAVADOC_DISABLED_DOCLINT_PACKAGES := org.w3c.* javax.smartcardio

 # The initial set of options for javadoc
 JAVADOC_OPTIONS := -use -keywords -notimestamp \
@@ -157,13 +154,14 @@ COPYRIGHT_BOTTOM = \
    <a href="$(REDISTRIBUTION_URL)">documentation redistribution policy</a>. \
    $(DRAFT_MARKER_STR) <!-- Version $(VERSION_STRING) -->

-JAVADOC_BOTTOM := \
+# $1 - Optional "Other Versions" link
+JAVADOC_BOTTOM = \
    <a href="$(BUG_SUBMIT_URL)">Report a bug or suggest an enhancement</a><br> \
    For further API reference and developer documentation see the \
    <a href="$(JAVADOC_BASE_URL)" target="_blank">Java SE \
    Documentation</a>, which contains more detailed, \
    developer-targeted descriptions with conceptual overviews, definitions \
-    of terms, workarounds, and working code examples.<br> \
+    of terms, workarounds, and working code examples. $1<br> \
    Java is a trademark or registered trademark of $(FULL_COMPANY_NAME) in \
    the US and other countries.<br> \
    $(call COPYRIGHT_BOTTOM, {@docroot}/../)
@@ -265,6 +263,7 @@ endef
 #   SHORT_NAME - The short name of this documentation collection
 #   LONG_NAME - The long name of this documentation collection
 #   TARGET_DIR - Where to store the output
+#   OTHER_VERSIONS - URL for other page listing versions
 #
 SetupApiDocsGeneration = $(NamedParamsMacroTemplate)
 define SetupApiDocsGenerationBody
@@ -297,20 +296,26 @@ define SetupApiDocsGenerationBody

  # Create a string like "-Xdoclint:all,-syntax,-html,..."
  $1_OPTIONS += -Xdoclint:all,$$(call CommaList, $$(addprefix -, \
-      $$(JAVADOC_DISABLED_DOCLINT)))
-  # Ignore the doclint warnings in the W3C DOM package
-  $1_OPTIONS += -Xdoclint/package:-org.w3c.*
+      $$(JAVADOC_DISABLED_DOCLINT_WARNINGS)))
+  # Ignore the doclint warnings in certain packages
+  $1_OPTIONS += -Xdoclint/package:$$(call CommaList, $$(addprefix -, \
+      $$(JAVADOC_DISABLED_DOCLINT_PACKAGES)))

  $1_DOC_TITLE := $$($1_LONG_NAME)<br>Version $$(VERSION_SPECIFICATION) API \
      Specification
  $1_WINDOW_TITLE := $$(subst &amp;,&,$$($1_SHORT_NAME))$$(DRAFT_MARKER_TITLE)
  $1_HEADER_TITLE := <div $$(HEADER_STYLE)><strong>$$($1_SHORT_NAME)</strong> \
      $$(DRAFT_MARKER_STR)</div>
+  ifneq ($$($1_OTHER_VERSIONS), )
+      $1_JAVADOC_BOTTOM := $$(call JAVADOC_BOTTOM, <a href="$$($1_OTHER_VERSIONS)">Other versions.</a>)
+  else
+      $1_JAVADOC_BOTTOM := $$(call JAVADOC_BOTTOM, )
+  endif

  $1_OPTIONS += -doctitle '$$($1_DOC_TITLE)'
  $1_OPTIONS += -windowtitle '$$($1_WINDOW_TITLE)'
  $1_OPTIONS += -header '$$($1_HEADER_TITLE)'
-  $1_OPTIONS += -bottom '$$(JAVADOC_BOTTOM)'
+  $1_OPTIONS += -bottom '$$($1_JAVADOC_BOTTOM)'
  ifeq ($$(IS_DRAFT), true)
    $1_OPTIONS += -top '$$(JAVADOC_TOP)'
  endif
@@ -327,6 +332,12 @@ define SetupApiDocsGenerationBody
  $$(eval $$(call create_overview_file,$1))
  $1_OPTIONS += -overview $$($1_OVERVIEW)

+  # Add summary pages for new/deprecated APIs in recent releases
+  $1_OPTIONS += --since $(call CommaList, \
+      $(filter-out $(VERSION_DOCS_API_SINCE), \
+          $(call sequence, $(VERSION_DOCS_API_SINCE), $(VERSION_FEATURE))))
+  $1_OPTIONS += --since-label "New API since JDK $(VERSION_DOCS_API_SINCE)"
+
  $$(foreach g, $$($1_GROUPS), \
    $$(eval $1_OPTIONS += -group "$$($$g_GROUP_NAME)" "$$($$g_GROUP_MODULES)") \
  )
@@ -442,6 +453,7 @@ $(eval $(call SetupApiDocsGeneration, JDK_API, \
    SHORT_NAME := $(JDK_SHORT_NAME), \
    LONG_NAME := $(JDK_LONG_NAME), \
    TARGET_DIR := $(DOCS_OUTPUTDIR)/api, \
+    OTHER_VERSIONS := $(OTHER_JDK_VERSIONS_URL), \
 ))

 # Targets generated are returned in JDK_API_JAVADOC_TARGETS and
@@ -477,7 +489,7 @@ $(eval $(call SetupApiDocsGeneration, REFERENCE_API, \
    SHORT_NAME := $(JAVASE_SHORT_NAME), \
    LONG_NAME := $(JAVASE_LONG_NAME), \
    TARGET_DIR := $(DOCS_REFERENCE_IMAGE_DIR)/api, \
-    JAVADOC_CMD := $(JAVADOC), \
+    JAVADOC_CMD := $(DOCS_REFERENCE_JAVADOC), \
    OPTIONS := $(REFERENCE_OPTIONS), \
    TAGS := $(REFERENCE_TAGS), \
 ))
--- a/make/GenerateLinkOptData.gmk
+++ b/make/GenerateLinkOptData.gmk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -88,7 +88,10 @@ $(CLASSLIST_FILE): $(INTERIM_IMAGE_DIR)/bin/java$(EXECUTABLE_SUFFIX) $(CLASSLIST
 	        $(CAT) $(LINK_OPT_DIR)/stderr $(JLI_TRACE_FILE) ; \
 	        exit $$exitcode \
 	    )
-	$(GREP) -v HelloClasslist $@.raw.2 > $@
+	$(GREP) -v HelloClasslist $@.raw.2 > $@.raw.3
+	$(FIXPATH) $(INTERIM_IMAGE_DIR)/bin/java \
+	    -cp $(SUPPORT_OUTPUTDIR)/classlist.jar \
+	    build.tools.classlist.SortClasslist $@.raw.3 > $@

 # The jli trace is created by the same recipe as classlist. By declaring these
 # dependencies, make will correctly rebuild both jli trace and classlist
--- a/make/Images.gmk
+++ b/make/Images.gmk
@@ -44,7 +44,7 @@ ALL_MODULES := $(call FindAllModules)
 $(eval $(call ReadImportMetaData))

 JRE_MODULES += $(filter $(ALL_MODULES), $(BOOT_MODULES) \
-    $(PLATFORM_MODULES) $(JRE_TOOL_MODULES))
+    $(PLATFORM_MODULES) jdk.jdwp.agent)
 JDK_MODULES += $(ALL_MODULES)

 JRE_MODULES_LIST := $(call CommaList, $(JRE_MODULES))
--- a/make/Init.gmk
+++ b/make/Init.gmk
@@ -200,7 +200,7 @@ ifeq ($(HAS_SPEC),)
 	            COMPARE_BUILD="$(COMPARE_BUILD):NODRYRUN=true" main && \
 	        $(MAKE) $(MFLAGS) $(MAKE_LOG_FLAGS) -r -R -f $(topdir)/make/Init.gmk \
 	            SPEC=$(spec) HAS_SPEC=true ACTUAL_TOPDIR=$(topdir) \
-	            COMPARE_BUILD="$(COMPARE_BUILD)" post-compare-build && \
+	            COMPARE_BUILD="$(COMPARE_BUILD):NODRYRUN=true" post-compare-build && \
 	    ) \
 	  ) true ) \
 	  $(eval TARGET_DONE=true) \
--- a/make/JBRApi.gmk
+++ b/make/JBRApi.gmk
@@ -0,0 +1,20 @@
+include Makefile
+include make/MainSupport.gmk
+
+.PHONY: jbr-api
+
+ifeq ($(SPEC),)
+  ifneq ($(words $(SPECS)),1)
+	@echo "Error: Multiple build specification files found. Please select one explicitly."
+	@exit 2
+  endif
+  jbr-api:
+	@cd $(topdir)
+	@$(MAKE) $(MFLAGS) $(MAKE_LOG_FLAGS) -r -R -j 1 -f $(topdir)/make/JBRApi.gmk SPEC=$(SPECS) HAS_SPEC=true ACTUAL_TOPDIR=$(topdir) MODULES="$(MODULES)" jbr-api
+else #with SPEC
+
+  jbr-api:
+	$(ECHO) "BUILD_DIR=$(OUTPUTDIR)" > $(OUT)
+	$(ECHO) "BOOT_JDK=\"$(BOOT_JDK)\"" >> $(OUT)
+
+endif
--- a/make/Main.gmk
+++ b/make/Main.gmk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -94,7 +94,6 @@ $(eval $(call SetupTarget, buildtools-modules, \

 $(eval $(call SetupTarget, buildtools-hotspot, \
    MAKEFILE := CompileToolsHotspot, \
-    DEPS := interim-langtools, \
 ))

 ################################################################################
@@ -187,6 +186,7 @@ JAVA_TARGETS := $(addsuffix -java, $(JAVA_MODULES))
 define DeclareCompileJavaRecipe
  $1-java:
 	+($(CD) $(TOPDIR)/make && $(MAKE) $(MAKE_ARGS) \
+	$(patsubst %,-I%/modules/$1,$(PHASE_MAKEDIRS)) \
 	    -f CompileJavaModules.gmk MODULE=$1)
 endef

@@ -659,18 +659,6 @@ $(eval $(call SetupTarget, test-image-libtest-jtreg-native, \
    DEPS := build-test-libtest-jtreg-native, \
 ))

-$(eval $(call SetupTarget, build-test-hotspot-jtreg-graal, \
-    MAKEFILE := test/JtregGraalUnit, \
-    TARGET := build-test-hotspot-jtreg-graal, \
-    DEPS := exploded-image, \
-))
-
-$(eval $(call SetupTarget, test-image-hotspot-jtreg-graal, \
-    MAKEFILE := test/JtregGraalUnit, \
-    TARGET := test-image-hotspot-jtreg-graal, \
-    DEPS := build-test-hotspot-jtreg-graal, \
-))
-
 ifneq ($(GTEST_FRAMEWORK_SRC), )
  $(eval $(call SetupTarget, test-image-hotspot-gtest, \
      MAKEFILE := hotspot/test/GtestImage, \
@@ -869,23 +857,14 @@ else
  # virtual target.
  jdk.jdwp.agent-libs: jdk.jdwp.agent-gensrc

+  # jdk.jfr-gendata uses TOOL_JFR_GEN from buildtools-hotspot
+  jdk.jfr-gendata: buildtools-hotspot
+
  # The swing beans need to have java base properly generated to avoid errors
  # in javadoc. The X11 wrappers need the java.base include files to have been
  # copied and processed.
  java.desktop-gensrc-src: java.base-gensrc java.base-copy

-  # The annotation processing for jdk.internal.vm.compiler
-  # and jdk.internal.vm.compiler.management needs classes from the current JDK.
-  jdk.internal.vm.compiler-gensrc-src: $(addsuffix -java, \
-      $(call FindTransitiveDepsForModule, jdk.internal.vm.compiler))
-  jdk.internal.vm.compiler.management-gensrc-src: $(addsuffix -java, \
-      $(call FindTransitiveDepsForModule, jdk.internal.vm.compiler.management))
-
-  # For these modules, the gensrc step is generating a module-info.java.extra
-  # file to be processed by the gensrc-moduleinfo target.
-  jdk.internal.vm.compiler-gensrc-moduleinfo: jdk.internal.vm.compiler-gensrc-src
-  jdk.internal.vm.compiler.management-gensrc-moduleinfo: jdk.internal.vm.compiler.management-gensrc-src
-
  jdk.jdeps-gendata: java

  # The ct.sym generation uses all the moduleinfos as input
@@ -1173,10 +1152,6 @@ else
  ifneq ($(GTEST_FRAMEWORK_SRC), )
    test-image: test-image-hotspot-gtest
  endif
-
-  ifeq ($(INCLUDE_GRAAL), true)
-    test-image: test-image-hotspot-jtreg-graal
-  endif
 endif

 ifeq ($(BUILD_FAILURE_HANDLER), true)
--- a/make/MainSupport.gmk
+++ b/make/MainSupport.gmk
@@ -150,9 +150,7 @@ define DeclareRecipeForModuleMakefile
  $2-$$($1_TARGET_SUFFIX):
 	+($(CD) $(TOPDIR)/make && $(MAKE) $(MAKE_ARGS) \
 	    -f ModuleWrapper.gmk -I $$(TOPDIR)/make/common/modules  \
-	    $$(addprefix -I, $$(PHASE_MAKEDIRS) \
-	        $$(addsuffix /modules/$2, $$(PHASE_MAKEDIRS)) \
-	    ) \
+	    $$(patsubst %,-I%/modules/$2,$$(PHASE_MAKEDIRS)) \
 	    MODULE=$2 MAKEFILE_PREFIX=$$($1_FILE_PREFIX) $$($1_EXTRA_ARGS))

 endef
--- a/make/RunTests.gmk
+++ b/make/RunTests.gmk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2016, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -46,7 +46,7 @@ endif

 $(eval $(call ParseKeywordVariable, TEST_OPTS, \
    SINGLE_KEYWORDS := JOBS TIMEOUT_FACTOR JCOV JCOV_DIFF_CHANGESET, \
-    STRING_KEYWORDS := VM_OPTIONS JAVA_OPTIONS AOT_MODULES, \
+    STRING_KEYWORDS := VM_OPTIONS JAVA_OPTIONS, \
 ))

 # Helper function to propagate TEST_OPTS values.
@@ -134,96 +134,6 @@ ifeq ($(GCOV_ENABLED), true)
  JTREG_COV_OPTIONS += -e:GCOV_PREFIX="$(GCOV_OUTPUT_DIR)"
 endif

-################################################################################
-# Optionally create AOT libraries for specified modules before running tests.
-# Note, this could not be done during JDK build time.
-################################################################################
-# Parameter 1 is the name of the rule.
-#
-# Remaining parameters are named arguments.
-#   MODULE      The module to generate a library for
-#   BIN         Output directory in which to put the library
-#   VM_OPTIONS  List of JVM arguments to use when creating library
-#   OPTIONS_VAR Name of variable to put AOT java options in
-#   PREREQS_VAR Name of variable to put all AOT prerequisite rule targets in
-#               for test rules to depend on
-#
-SetupAotModule = $(NamedParamsMacroTemplate)
-define SetupAotModuleBody
-  $1_AOT_LIB := $$($1_BIN)/$$(call SHARED_LIBRARY,$$($1_MODULE))
-  $1_AOT_CCLIST := $$(wildcard $$(TOPDIR)/test/hotspot/jtreg/compiler/aot/scripts/$$($1_MODULE)-list.txt)
-
-  # Create jaotc flags.
-  # VM flags which don't affect AOT code generation are filtered out:
-  # -Xcomp, -XX:+-TieredCompilation
-  $1_JAOTC_OPTS := \
-      -J-Xmx4g --info \
-      $$(addprefix -J, $$(filter-out -Xcomp %TieredCompilation, $$($1_VM_OPTIONS))) \
-      $$(addprefix --compile-commands$(SPACE), $$($1_AOT_CCLIST)) \
-      --linker-path $$(LD_JAOTC) \
-      #
-
-  ifneq ($$(filter -ea, $$($1_VM_OPTIONS)), )
-    $1_JAOTC_OPTS += --compile-with-assertions
-  endif
-
-  ifneq ($$(filter -XX:+VerifyOops, $$($1_VM_OPTIONS)), )
-    $1_JAOTC_OPTS += -J-Dgraal.AOTVerifyOops=true
-  endif
-
-  $$($1_AOT_LIB): $$(JDK_UNDER_TEST)/release \
-      $$(call DependOnVariable, $1_JAOTC_OPTS) \
-      $$(call DependOnVariable, JDK_UNDER_TEST)
-	$$(call LogWarn, Generating $$(patsubst $$(OUTPUTDIR)/%, %, $$@))
-	$$(call MakeTargetDir)
-	$$(call ExecuteWithLog, $$@, \
-	    $((COV_ENVIRONMENT) \
-	    $$(FIXPATH) $$(JDK_UNDER_TEST)/bin/jaotc \
-	        $$($1_JAOTC_OPTS) --output $$@ --module $$($1_MODULE) \
-	)
-	$$(call ExecuteWithLog, $$@.check, ( \
-	    $$(FIXPATH) $$(JDK_UNDER_TEST)/bin/java \
-	        $$($1_VM_OPTIONS) -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions \
-	        -XX:+PrintAOT -XX:+UseAOTStrictLoading \
-	        -XX:AOTLibrary=$$@ -version \
-	         > $$@.verify-aot \
-	))
-
-  $1_AOT_OPTIONS += -XX:+UnlockExperimentalVMOptions
-  $1_AOT_OPTIONS += -XX:AOTLibrary=$$($1_AOT_LIB)
-  $1_AOT_TARGETS += $$($1_AOT_LIB)
-endef
-
-################################################################################
-# Optionally create AOT libraries before running tests.
-# Note, this could not be done during JDK build time.
-################################################################################
-# Parameter 1 is the name of the rule.
-#
-# Remaining parameters are named arguments.
-#   MODULES     The modules to generate a library for
-#   VM_OPTIONS  List of JVM arguments to use when creating libraries
-#
-# After calling this, the following variables are defined
-#   $1_AOT_OPTIONS List of all java options needed to use the AOT libraries
-#   $1_AOT_TARGETS List of all targets that the test rule will need to depend on
-#
-SetupAot = $(NamedParamsMacroTemplate)
-define SetupAotBody
-  $$(info Running with AOTd libraries for $$($1_MODULES))
-  # Put aot libraries in a separate directory so they are not deleted between
-  # test runs and may be reused between make invocations.
-  $$(foreach m, $$($1_MODULES), \
-    $$(eval $$(call SetupAotModule, $1_$$m, \
-        MODULE := $$m, \
-        BIN := $$(TEST_SUPPORT_DIR)/aot/$1, \
-        VM_OPTIONS := $$($1_VM_OPTIONS), \
-    )) \
-    $$(eval $1_AOT_OPTIONS += $$($1_$$m_AOT_OPTIONS)) \
-    $$(eval $1_AOT_TARGETS += $$($1_$$m_AOT_TARGETS)) \
-  )
-endef
-
 ################################################################################
 # Setup global test running parameters
 ################################################################################
@@ -282,7 +192,6 @@ endif

 $(eval $(call SetTestOpt,VM_OPTIONS,JTREG))
 $(eval $(call SetTestOpt,JAVA_OPTIONS,JTREG))
-$(eval $(call SetTestOpt,AOT_MODULES,JTREG))

 $(eval $(call SetTestOpt,JOBS,JTREG))
 $(eval $(call SetTestOpt,TIMEOUT_FACTOR,JTREG))
@@ -293,7 +202,7 @@ $(eval $(call ParseKeywordVariable, JTREG, \
        TEST_MODE ASSERT VERBOSE RETAIN MAX_MEM RUN_PROBLEM_LISTS \
        RETRY_COUNT MAX_OUTPUT, \
    STRING_KEYWORDS := OPTIONS JAVA_OPTIONS VM_OPTIONS KEYWORDS \
-        EXTRA_PROBLEM_LISTS AOT_MODULES LAUNCHER_OPTIONS, \
+        EXTRA_PROBLEM_LISTS LAUNCHER_OPTIONS, \
 ))

 ifneq ($(JTREG), )
@@ -305,11 +214,10 @@ endif

 $(eval $(call SetTestOpt,VM_OPTIONS,GTEST))
 $(eval $(call SetTestOpt,JAVA_OPTIONS,GTEST))
-$(eval $(call SetTestOpt,AOT_MODULES,GTEST))

 $(eval $(call ParseKeywordVariable, GTEST, \
    SINGLE_KEYWORDS := REPEAT, \
-    STRING_KEYWORDS := OPTIONS VM_OPTIONS JAVA_OPTIONS AOT_MODULES, \
+    STRING_KEYWORDS := OPTIONS VM_OPTIONS JAVA_OPTIONS, \
 ))

 ifneq ($(GTEST), )
@@ -350,8 +258,6 @@ langtools_JTREG_PROBLEM_LIST += $(TOPDIR)/test/langtools/ProblemList.txt
 hotspot_JTREG_PROBLEM_LIST += $(TOPDIR)/test/hotspot/jtreg/ProblemList.txt
 lib-test_JTREG_PROBLEM_LIST += $(TOPDIR)/test/lib-test/ProblemList.txt

-langtools_JTREG_MAX_MEM := 768m
-
 ################################################################################
 # Parse test selection
 #
@@ -592,14 +498,7 @@ define SetupRunGtestTestBody
    $1_GTEST_REPEAT :=--gtest_repeat=$$(GTEST_REPEAT)
  endif

-  ifneq ($$(GTEST_AOT_MODULES), )
-    $$(eval $$(call SetupAot, $1, \
-        MODULES := $$(GTEST_AOT_MODULES), \
-        VM_OPTIONS := $$(GTEST_VM_OPTIONS) $$(GTEST_JAVA_OPTIONS), \
-    ))
-  endif
-
-  run-test-$1: pre-run-test $$($1_AOT_TARGETS)
+  run-test-$1: pre-run-test
 	$$(call LogWarn)
 	$$(call LogWarn, Running test '$$($1_TEST)')
 	$$(call MakeDir, $$($1_TEST_RESULTS_DIR) $$($1_TEST_SUPPORT_DIR))
@@ -608,8 +507,9 @@ define SetupRunGtestTestBody
 	    $$(FIXPATH) $$(TEST_IMAGE_DIR)/hotspot/gtest/$$($1_VARIANT)/gtestLauncher \
 	        -jdk $(JDK_UNDER_TEST) $$($1_GTEST_FILTER) \
 	        --gtest_output=xml:$$($1_TEST_RESULTS_DIR)/gtest.xml \
+	        --gtest_catch_exceptions=0 \
 	        $$($1_GTEST_REPEAT) $$(GTEST_OPTIONS) $$(GTEST_VM_OPTIONS) \
-	        $$(GTEST_JAVA_OPTIONS) $$($1_AOT_OPTIONS) \
+	        $$(GTEST_JAVA_OPTIONS) \
 	        > >($(TEE) $$($1_TEST_RESULTS_DIR)/gtest.txt) \
 	    && $$(ECHO) $$$$? > $$($1_EXITCODE) \
 	    || $$(ECHO) $$$$? > $$($1_EXITCODE) \
@@ -820,7 +720,7 @@ define SetupRunJtregTestBody
  # Convert JTREG_foo into $1_JTREG_foo with a suitable value.
  $$(eval $$(call SetJtregValue,$1,JTREG_TEST_MODE,agentvm))
  $$(eval $$(call SetJtregValue,$1,JTREG_ASSERT,true))
-  $$(eval $$(call SetJtregValue,$1,JTREG_MAX_MEM,512m))
+  $$(eval $$(call SetJtregValue,$1,JTREG_MAX_MEM,768m))
  $$(eval $$(call SetJtregValue,$1,JTREG_NATIVEPATH))
  $$(eval $$(call SetJtregValue,$1,JTREG_BASIC_OPTIONS))
  $$(eval $$(call SetJtregValue,$1,JTREG_PROBLEM_LIST))
@@ -836,7 +736,7 @@ define SetupRunJtregTestBody

  # Make sure MaxRAMPercentage is high enough to not cause OOM or swapping since
  # we may end up with a lot of JVM's
-  $1_JTREG_MAX_RAM_PERCENTAGE := $$(shell $$(EXPR) 25 / $$($1_JTREG_JOBS))
+  $1_JTREG_MAX_RAM_PERCENTAGE := $$(shell $(AWK) 'BEGIN { print 25 / $$($1_JTREG_JOBS); }')

  JTREG_TIMEOUT_FACTOR ?= 4

@@ -889,6 +789,15 @@ define SetupRunJtregTestBody
    $1_JTREG_BASIC_OPTIONS += -ea -esa
  endif

+  ifeq ($$(ASAN_ENABLED), yes)
+    $1_JTREG_BASIC_OPTIONS += -e:ASAN_OPTIONS=handle_segv=0:handle_sigfpe=0:detect_leaks=false
+    $1_JTREG_BASIC_OPTIONS += -e:LD_PRELOAD=libasan.so.5
+  endif
+
+  ifeq ($$(USAN_ENABLED), yes)
+    $1_JTREG_BASIC_OPTIONS += -e:LD_PRELOAD=libubsan.so.1
+  endif
+
  ifneq ($$($1_JTREG_NATIVEPATH), )
    $1_JTREG_BASIC_OPTIONS += -nativepath:$$($1_JTREG_NATIVEPATH)
  endif
@@ -916,7 +825,6 @@ define SetupRunJtregTestBody
  endif

  $1_JTREG_BASIC_OPTIONS += -e:TEST_IMAGE_DIR=$(TEST_IMAGE_DIR)
-  $1_JTREG_BASIC_OPTIONS += -e:TEST_IMAGE_GRAAL_DIR=$(TEST_IMAGE_DIR)/hotspot/jtreg/graal

  ifneq ($$(JTREG_FAILURE_HANDLER_OPTIONS), )
    $1_JTREG_LAUNCHER_OPTIONS += -Djava.library.path="$(JTREG_FAILURE_HANDLER_DIR)"
@@ -933,17 +841,6 @@ define SetupRunJtregTestBody
    endif
  endif

-  ifneq ($$(JTREG_AOT_MODULES), )
-    $$(eval $$(call SetupAot, $1, \
-        MODULES := $$(JTREG_AOT_MODULES), \
-        VM_OPTIONS := $$(JTREG_VM_OPTIONS) $$(JTREG_JAVA_OPTIONS), \
-    ))
-  endif
-
-  ifneq ($$($1_AOT_OPTIONS), )
-    $1_JTREG_BASIC_OPTIONS += -vmoptions:"$$($1_AOT_OPTIONS)"
-  endif
-
  clean-workdir-$1:
 	$$(RM) -r $$($1_TEST_SUPPORT_DIR)

@@ -978,7 +875,7 @@ define SetupRunJtregTestBody
        done
  endif

-  run-test-$1: pre-run-test clean-workdir-$1 $$($1_AOT_TARGETS)
+  run-test-$1: pre-run-test clean-workdir-$1
 	$$(call LogWarn)
 	$$(call LogWarn, Running test '$$($1_TEST)')
 	$$(call MakeDir, $$($1_TEST_RESULTS_DIR) $$($1_TEST_SUPPORT_DIR) \
--- a/make/RunTestsPrebuilt.gmk
+++ b/make/RunTestsPrebuilt.gmk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -189,8 +189,10 @@ ifeq ($(OPENJDK_TARGET_CPU), x86_64)
 endif

 ifeq ($(OPENJDK_TARGET_OS), windows)
-  FIXPATH := $(BASH) $(TOPDIR)/make/scripts/fixpath.sh exec
+  FIXPATH_BASE := $(BASH) $(TOPDIR)/make/scripts/fixpath.sh
+  FIXPATH := $(FIXPATH_BASE) exec
 else
+  FIXPATH_BASE :=
  FIXPATH :=
 endif

@@ -220,25 +222,6 @@ ifeq ($(MEMORY_SIZE), )
  MEMORY_SIZE := 1024
 endif

-# Setup LD for AOT support
-ifneq ($(DEVKIT_HOME), )
-  ifeq ($(OPENJDK_TARGET_OS), windows)
-    LD_JAOTC := $(DEVKIT_HOME)/VC/bin/x64/link.exe
-    LIBRARY_PREFIX :=
-    SHARED_LIBRARY_SUFFIX := .dll
-  else ifeq ($(OPENJDK_TARGET_OS), linux)
-    LD_JAOTC := $(DEVKIT_HOME)/bin/ld
-    LIBRARY_PREFIX := lib
-    SHARED_LIBRARY_SUFFIX := .so
-  else ifeq ($(OPENJDK_TARGET_OS), macosx)
-    LD_JAOTC := $(DEVKIT_HOME)/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld
-    LIBRARY_PREFIX := lib
-    SHARED_LIBRARY_SUFFIX := .dylib
-  endif
-else
-  LD := ld
-endif
-
 ifneq ($(wildcard $(JDK_IMAGE_DIR)/template.xml), )
  TEST_OPTS_JCOV := true
  JCOV_IMAGE_DIR := $(JDK_IMAGE_DIR)
@@ -273,6 +256,7 @@ $(call CreateNewSpec, $(NEW_SPEC), \
    MAKE := $(MAKE), \
    BASH := $(BASH), \
    JIB_JAR := $(JIB_JAR), \
+    FIXPATH_BASE := $(FIXPATH_BASE), \
    FIXPATH := $(FIXPATH), \
    OPENJDK_TARGET_OS := $(OPENJDK_TARGET_OS), \
    OPENJDK_TARGET_OS_TYPE := $(OPENJDK_TARGET_OS_TYPE), \
@@ -283,9 +267,6 @@ $(call CreateNewSpec, $(NEW_SPEC), \
    OPENJDK_TARGET_CPU_ENDIAN := $(OPENJDK_TARGET_CPU_ENDIAN), \
    NUM_CORES := $(NUM_CORES), \
    MEMORY_SIZE := $(MEMORY_SIZE), \
-    LD_JAOTC := $(LD_JAOTC), \
-    LIBRARY_PREFIX := $(LIBRARY_PREFIX), \
-    SHARED_LIBRARY_SUFFIX := $(SHARED_LIBRARY_SUFFIX), \
    include $(TOPDIR)/make/RunTestsPrebuiltSpec.gmk, \
    TEST_OPTS_JCOV := $(TEST_OPTS_JCOV), \
    $(CUSTOM_NEW_SPEC_LINE), \
--- a/make/ToolsJdk.gmk
+++ b/make/ToolsJdk.gmk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -67,9 +67,9 @@ TOOL_GENERATECURRENCYDATA = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_
 TOOL_TZDB = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
    build.tools.tzdb.TzdbZoneRulesCompiler

-TOOL_BLACKLISTED_CERTS = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
+TOOL_BLOCKED_CERTS = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
    --add-exports java.base/sun.security.util=ALL-UNNAMED \
-    build.tools.blacklistedcertsconverter.BlacklistedCertsConverter
+    build.tools.blockedcertsconverter.BlockedCertsConverter

 TOOL_MAKEJAVASECURITY = $(JAVA_SMALL) -cp $(BUILDTOOLS_OUTPUTDIR)/jdk_tools_classes \
    build.tools.makejavasecurity.MakeJavaSecurity
--- a/make/autoconf/boot-jdk.m4
+++ b/make/autoconf/boot-jdk.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -298,6 +298,28 @@ AC_DEFUN([BOOTJDK_CHECK_TOOL_IN_BOOTJDK],
    ])
 ])

+# Setup CLASSPATH environment variable
+AC_DEFUN([BOOTJDK_SETUP_CLASSPATH],
+[
+  AC_ARG_WITH([classpath], [AS_HELP_STRING([--with-classpath],
+      [Optional classpath to set as CLASSPATH to all Java invocations @<:@none@:>@])])
+
+  if test "x$CLASSPATH" != x; then
+    AC_MSG_WARN([CLASSPATH is set in the environment. This will be ignored. Use --with-classpath instead.])
+  fi
+
+  CLASSPATH=
+
+  if test "x$with_classpath" != x && test "x$with_classpath" != xyes &&
+      test "x$with_classpath" != xno ; then
+    CLASSPATH="$with_classpath"
+    AC_MSG_CHECKING([for classpath to use for all Java invocations])
+    AC_MSG_RESULT([$CLASSPATH])
+  fi
+
+  AC_SUBST(CLASSPATH)
+])
+
 ###############################################################################
 #
 # We need a Boot JDK to bootstrap the build.
@@ -394,6 +416,8 @@ AC_DEFUN_ONCE([BOOTJDK_SETUP_BOOT_JDK],
    BOOTJDK_USE_LOCAL_CDS=false
    AC_MSG_RESULT([no, -XX:SharedArchiveFile not supported])
  fi
+
+  BOOTJDK_SETUP_CLASSPATH
 ])

 AC_DEFUN_ONCE([BOOTJDK_SETUP_BOOT_JDK_ARGUMENTS],
@@ -606,3 +630,28 @@ AC_DEFUN([BOOTJDK_SETUP_BUILD_JDK],
  AC_SUBST(BUILD_JDK)
  AC_SUBST(EXTERNAL_BUILDJDK)
 ])
+
+# The docs-reference JDK is used to run javadoc for the docs-reference targets.
+# If not set, the reference docs will be built using the interim javadoc.
+AC_DEFUN([BOOTJDK_SETUP_DOCS_REFERENCE_JDK],
+[
+  AC_ARG_WITH(docs-reference-jdk, [AS_HELP_STRING([--with-docs-reference-jdk],
+      [path to JDK to use for building the reference documentation])])
+
+  AC_MSG_CHECKING([for docs-reference JDK])
+  if test "x$with_docs_reference_jdk" != "x"; then
+    DOCS_REFERENCE_JDK="$with_docs_reference_jdk"
+    AC_MSG_RESULT([$DOCS_REFERENCE_JDK])
+    DOCS_REFERENCE_JAVADOC="$DOCS_REFERENCE_JDK/bin/javadoc"
+    if test ! -x "$DOCS_REFERENCE_JAVADOC"; then
+      AC_MSG_ERROR([docs-reference JDK found at $DOCS_REFERENCE_JDK did not contain bin/javadoc])
+    fi
+    UTIL_FIXUP_EXECUTABLE(DOCS_REFERENCE_JAVADOC)
+  else
+    AC_MSG_RESULT([no, using interim javadoc for the docs-reference targets])
+    # By leaving this empty, Docs.gmk will revert to the default interim javadoc
+    DOCS_REFERENCE_JAVADOC=
+  fi
+
+  AC_SUBST(DOCS_REFERENCE_JAVADOC)
+])
--- a/make/autoconf/build-aux/config.guess
+++ b/make/autoconf/build-aux/config.guess
@@ -1,6 +1,7 @@
 #!/bin/sh
 #
-# Copyright (c) 2012, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2012, 2021, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2021, Azul Systems, Inc. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -101,6 +102,27 @@ if [ "x$OUT" = x ]; then
  fi
 fi

+# Test and fix LoongArch64.
+if [ "x$OUT" = x ]; then
+  if [ `uname -s` = Linux ]; then
+    if [ `uname -m` = loongarch64 ]; then
+      OUT=loongarch64-unknown-linux-gnu
+    fi
+  fi
+fi
+
+# Test and fix cpu on macos-aarch64, uname -p reports arm, buildsys expects aarch64
+echo $OUT | grep arm-apple-darwin > /dev/null 2> /dev/null
+if test $? != 0; then
+  # The GNU version of uname may be on the PATH which reports arm64 instead
+  echo $OUT | grep arm64-apple-darwin > /dev/null 2> /dev/null
+fi
+if test $? = 0; then
+  if [ `uname -m` = arm64 ]; then
+    OUT=aarch64`echo $OUT | sed -e 's/[^-]*//'`
+  fi
+fi
+
 # Test and fix cpu on Macosx when C preprocessor is not on the path
 echo $OUT | grep i386-apple-darwin > /dev/null 2> /dev/null
 if test $? = 0; then
--- a/make/autoconf/configure.ac
+++ b/make/autoconf/configure.ac
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -144,6 +144,7 @@ JDKVER_SETUP_JDK_VERSION_NUMBERS

 BOOTJDK_SETUP_BOOT_JDK
 BOOTJDK_SETUP_BUILD_JDK
+BOOTJDK_SETUP_DOCS_REFERENCE_JDK

 ###############################################################################
 #
@@ -216,6 +217,9 @@ JDKOPT_SETUP_CODE_COVERAGE
 # AddressSanitizer
 JDKOPT_SETUP_ADDRESS_SANITIZER

+# UndefinedBehaviorSanitizer
+JDKOPT_SETUP_UNDEFINED_BEHAVIOR_SANITIZER
+
 ###############################################################################
 #
 # Check dependencies for external and internal libraries.
@@ -247,6 +251,7 @@ JDKOPT_ENABLE_DISABLE_GENERATE_CLASSLIST
 JDKOPT_EXCLUDE_TRANSLATIONS
 JDKOPT_ENABLE_DISABLE_MANPAGES
 JDKOPT_ENABLE_DISABLE_CDS_ARCHIVE
+JDKOPT_ENABLE_DISABLE_COMPATIBLE_CDS_ALIGNMENT

 ###############################################################################
 #
--- a/make/autoconf/flags-cflags.m4
+++ b/make/autoconf/flags-cflags.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -137,7 +137,7 @@ AC_DEFUN([FLAGS_SETUP_WARNINGS],
      DISABLED_WARNINGS="4800"
      if test "x$TOOLCHAIN_VERSION" = x2017; then
        # VS2017 incorrectly triggers this warning for constexpr
-        DISABLED_WARNINGS+=" 4307"
+        DISABLED_WARNINGS="$DISABLED_WARNINGS 4307"
      fi
      ;;

@@ -168,11 +168,6 @@ AC_DEFUN([FLAGS_SETUP_WARNINGS],

      DISABLED_WARNINGS="unknown-warning-option unused-parameter unused"

-      if test "x$OPENJDK_TARGET_OS" = xmacosx; then
-        # missing-method-return-type triggers in JavaNativeFoundation framework
-        DISABLED_WARNINGS="$DISABLED_WARNINGS missing-method-return-type"
-      fi
-
      ;;

    xlc)
@@ -235,7 +230,7 @@ AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
      DISABLE_FORTIFY_CFLAGS="-U_FORTIFY_SOURCE"
      # ASan doesn't work well with _FORTIFY_SOURCE
      # See https://github.com/google/sanitizers/wiki/AddressSanitizer#faq
-      if test "x$ASAN_ENABLED" = xyes; then
+      if test "x$ASAN_ENABLED" = xyes || test "x$USAN_ENABLED" = xyes; then
        ENABLE_FORTIFY_CFLAGS="${DISABLE_FORTIFY_CFLAGS}"
      else
        ENABLE_FORTIFY_CFLAGS="-D_FORTIFY_SOURCE=2"
@@ -605,25 +600,6 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_HELPER],
    fi
  fi

-  # Optional POSIX functionality needed by the JVM
-  #
-  # Check if clock_gettime is available and in which library. This indicates
-  # availability of CLOCK_MONOTONIC for hotspot. But we don't need to link, so
-  # don't let it update LIBS.
-  save_LIBS="$LIBS"
-  AC_SEARCH_LIBS(clock_gettime, rt, [HAS_CLOCK_GETTIME=true], [])
-  if test "x$LIBS" = "x-lrt "; then
-    CLOCK_GETTIME_IN_LIBRT=true
-  fi
-  LIBS="$save_LIBS"
-
-  if test "x$HAS_CLOCK_GETTIME" = "xtrue"; then
-    OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DSUPPORTS_CLOCK_MONOTONIC"
-    if test "x$CLOCK_GETTIME_IN_LIBRT" = "xtrue"; then
-      OS_CFLAGS_JVM="$OS_CFLAGS_JVM -DNEEDS_LIBRT"
-    fi
-  fi
-
  # Extra flags needed when building optional static versions of certain
  # JDK libraries.
  STATIC_LIBS_CFLAGS="-DSTATIC_BUILD=1"
@@ -684,9 +660,21 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
  # CFLAGS PER CPU
  if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
    # COMMON to gcc and clang
+    AC_MSG_CHECKING([if $1 is x86])
    if test "x$FLAGS_CPU" = xx86; then
-      # Force compatibility with i586 on 32 bit intel platforms.
-      $1_CFLAGS_CPU="-march=i586"
+      AC_MSG_RESULT([yes])
+      AC_MSG_CHECKING([if control flow protection is enabled by additional compiler flags])
+      if echo "${EXTRA_CFLAGS}${EXTRA_CXXFLAGS}${EXTRA_ASFLAGS}" | ${GREP} -q 'fcf-protection' ; then
+        # cf-protection requires CMOV and thus i686
+        $1_CFLAGS_CPU="-march=i686"
+        AC_MSG_RESULT([yes, forcing ${$1_CFLAGS_CPU}])
+      else
+        # Force compatibility with i586 on 32 bit intel platforms.
+        $1_CFLAGS_CPU="-march=i586"
+        AC_MSG_RESULT([no, forcing ${$1_CFLAGS_CPU}])
+      fi
+    else
+      AC_MSG_RESULT([no])
    fi
  fi

@@ -749,6 +737,15 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
    $1_TOOLCHAIN_CFLAGS="${$1_GCC6_CFLAGS}"

    $1_WARNING_CFLAGS_JVM="-Wno-format-zero-length -Wtype-limits -Wuninitialized"
+  elif test "x$TOOLCHAIN_TYPE" = xclang; then
+    NO_DELETE_NULL_POINTER_CHECKS_CFLAG="-fno-delete-null-pointer-checks"
+    FLAGS_COMPILER_CHECK_ARGUMENTS(ARGUMENT: [$NO_DELETE_NULL_POINTER_CHECKS_CFLAG],
+        PREFIX: $3,
+        IF_FALSE: [
+            NO_DELETE_NULL_POINTER_CHECKS_CFLAG=
+        ]
+    )
+    $1_TOOLCHAIN_CFLAGS="${NO_DELETE_NULL_POINTER_CHECKS_CFLAG}"
  fi

  if test "x$TOOLCHAIN_TYPE" = xmicrosoft && test "x$ENABLE_REPRODUCIBLE_BUILD" = xtrue; then
--- a/make/autoconf/flags-ldflags.m4
+++ b/make/autoconf/flags-ldflags.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
--- a/make/autoconf/flags-other.m4
+++ b/make/autoconf/flags-other.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -76,8 +76,27 @@ AC_DEFUN([FLAGS_SETUP_RCFLAGS],
 # platform independent
 AC_DEFUN([FLAGS_SETUP_ASFLAGS],
 [
+  if test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang; then
+    # Force preprocessor to run, just to make sure
+    BASIC_ASFLAGS="-x assembler-with-cpp"
+  elif test "x$TOOLCHAIN_TYPE" = xmicrosoft; then
+    BASIC_ASFLAGS="-nologo -c"
+  fi
+  AC_SUBST(BASIC_ASFLAGS)
+
  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
-    JVM_BASIC_ASFLAGS="-x assembler-with-cpp -mno-omit-leaf-frame-pointer -mstack-alignment=16"
+    JVM_BASIC_ASFLAGS="-mno-omit-leaf-frame-pointer -mstack-alignment=16"
+
+    # Fix linker warning.
+    # Code taken from make/autoconf/flags-cflags.m4 and adapted.
+    JVM_BASIC_ASFLAGS="$JVM_BASIC_ASFLAGS \
+        -DMAC_OS_X_VERSION_MIN_REQUIRED=$MACOSX_VERSION_MIN_NODOTS \
+        -mmacosx-version-min=$MACOSX_VERSION_MIN"
+
+    if test -n "$MACOSX_VERSION_MAX"; then
+        JVM_BASIC_ASFLAGS="$JVM_BASIC_ASFLAGS $OS_CFLAGS \
+            -DMAC_OS_X_VERSION_MAX_ALLOWED=$MACOSX_VERSION_MAX_NODOTS"
+    fi
  fi
 ])

--- a/make/autoconf/flags.m4
+++ b/make/autoconf/flags.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -125,19 +125,25 @@ AC_DEFUN([FLAGS_SETUP_MACOSX_VERSION],
 [
  # Additional macosx handling
  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    # The expected format for <version> is either nn.n.n or nn.nn.nn. See
+    # /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/AvailabilityVersions.h
+
    # MACOSX_VERSION_MIN specifies the lowest version of Macosx that the built
    # binaries should be compatible with, even if compiled on a newer version
    # of the OS. It currently has a hard coded value. Setting this also limits
    # exposure to API changes in header files. Bumping this is likely to
    # require code changes to build.
-    MACOSX_VERSION_MIN=10.9.0
+    if test "x$OPENJDK_TARGET_CPU_ARCH" = xaarch64; then
+      MACOSX_VERSION_MIN=11.00.00
+    else
+      MACOSX_VERSION_MIN=10.12.0
+    fi
    MACOSX_VERSION_MIN_NODOTS=${MACOSX_VERSION_MIN//\./}

    AC_SUBST(MACOSX_VERSION_MIN)

    # Setting --with-macosx-version-max=<version> makes it an error to build or
-    # link to macosx APIs that are newer than the given OS version. The expected
-    # format for <version> is either nn.n.n or nn.nn.nn. See /usr/include/AvailabilityMacros.h.
+    # link to macosx APIs that are newer than the given OS version.
    AC_ARG_WITH([macosx-version-max], [AS_HELP_STRING([--with-macosx-version-max],
        [error on use of newer functionality. @<:@macosx@:>@])],
        [
@@ -259,6 +265,14 @@ AC_DEFUN_ONCE([FLAGS_PRE_TOOLCHAIN],
    fi
  fi

+  if test "x$OPENJDK_TARGET_OS" = xmacosx; then
+    if test "x$OPENJDK_TARGET_CPU" = xaarch64; then
+      MACHINE_FLAG="$MACHINE_FLAG -arch arm64"
+    elif test "x$OPENJDK_TARGET_CPU" = xx86_64; then
+      MACHINE_FLAG="$MACHINE_FLAG -arch x86_64"
+    fi
+  fi
+
  # FIXME: global flags are not used yet...
  # The "global" flags will *always* be set. Without them, it is not possible to
  # get a working compilation.
@@ -360,15 +374,13 @@ AC_DEFUN([FLAGS_SETUP_TOOLCHAIN_CONTROL],

  # Generate make dependency files
  if test "x$TOOLCHAIN_TYPE" = xgcc; then
-    C_FLAG_DEPS="-MMD -MF"
+    GENDEPS_FLAGS="-MMD -MF"
  elif test "x$TOOLCHAIN_TYPE" = xclang; then
-    C_FLAG_DEPS="-MMD -MF"
+    GENDEPS_FLAGS="-MMD -MF"
  elif test "x$TOOLCHAIN_TYPE" = xxlc; then
-    C_FLAG_DEPS="-qmakedep=gcc -MF"
+    GENDEPS_FLAGS="-qmakedep=gcc -MF"
  fi
-  CXX_FLAG_DEPS="$C_FLAG_DEPS"
-  AC_SUBST(C_FLAG_DEPS)
-  AC_SUBST(CXX_FLAG_DEPS)
+  AC_SUBST(GENDEPS_FLAGS)
 ])

 AC_DEFUN_ONCE([FLAGS_POST_TOOLCHAIN],
--- a/make/autoconf/help.m4
+++ b/make/autoconf/help.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -42,21 +42,21 @@ AC_DEFUN([HELP_MSG_MISSING_DEPENDENCY],
    PKGHANDLER_COMMAND=

    case $PKGHANDLER in
-      apt-get)
+      *apt-get)
        apt_help     $MISSING_DEPENDENCY ;;
-      yum)
+      *yum)
        yum_help     $MISSING_DEPENDENCY ;;
-      brew)
+      *brew)
        brew_help    $MISSING_DEPENDENCY ;;
-      port)
+      *port)
        port_help    $MISSING_DEPENDENCY ;;
-      pkgutil)
+      *pkgutil)
        pkgutil_help $MISSING_DEPENDENCY ;;
-      pkgadd)
+      *pkgadd)
        pkgadd_help  $MISSING_DEPENDENCY ;;
-      zypper)
+      *zypper)
        zypper_help  $MISSING_DEPENDENCY ;;
-      pacman)
+      *pacman)
        pacman_help  $MISSING_DEPENDENCY ;;
    esac

@@ -274,7 +274,7 @@ AC_DEFUN_ONCE([HELP_PRINT_SUMMARY_AND_WARNINGS],

  printf "\n"
  printf "Build performance summary:\n"
-  printf "* Cores to use:   $JOBS\n"
+  printf "* Build jobs:     $JOBS\n"
  printf "* Memory limit:   $MEMORY_SIZE MB\n"
  if test "x$CCACHE_STATUS" != "x"; then
    printf "* ccache status:  $CCACHE_STATUS\n"
--- a/make/autoconf/jdk-options.m4
+++ b/make/autoconf/jdk-options.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -240,11 +240,7 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_DEBUG_SYMBOLS],
      [AS_HELP_STRING([--with-native-debug-symbols],
      [set the native debug symbol configuration (none, internal, external, zipped) @<:@varying@:>@])],
      [
-        if test "x$OPENJDK_TARGET_OS" = xaix; then
-          if test "x$withval" = xexternal || test "x$withval" = xzipped; then
-            AC_MSG_ERROR([AIX only supports the parameters 'none' and 'internal' for --with-native-debug-symbols])
-          fi
-        elif test "x$OPENJDK_TARGET_OS" = xwindows; then
+        if test "x$OPENJDK_TARGET_OS" = xwindows; then
          if test "x$withval" = xinternal; then
            AC_MSG_ERROR([Windows does not support the parameter 'internal' for --with-native-debug-symbols])
          fi
@@ -254,12 +250,7 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_DEBUG_SYMBOLS],
        if test "x$STATIC_BUILD" = xtrue; then
          with_native_debug_symbols="none"
        else
-          if test "x$OPENJDK_TARGET_OS" = xaix; then
-            # AIX doesn't support 'external' so use 'internal' as default
-            with_native_debug_symbols="internal"
-          else
-            with_native_debug_symbols="external"
-          fi
+          with_native_debug_symbols="external"
        fi
      ])
  AC_MSG_RESULT([$with_native_debug_symbols])
@@ -445,6 +436,45 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_ADDRESS_SANITIZER],
  AC_SUBST(ASAN_ENABLED)
 ])

+###############################################################################
+#
+# UndefinedBehaviorSanitizer
+#
+AC_DEFUN_ONCE([JDKOPT_SETUP_UNDEFINED_BEHAVIOR_SANITIZER],
+[
+  UTIL_ARG_ENABLE(NAME: usan, DEFAULT: false,
+      DESC: [enable UndefinedBehaviorSanitizer],
+      CHECK_AVAILABLE: [
+        AC_MSG_CHECKING([if UndefinedBehaviorSanitizer (usan) is available])
+        if test "x$TOOLCHAIN_TYPE" = "xgcc" ||
+            test "x$TOOLCHAIN_TYPE" = "xclang"; then
+          AC_MSG_RESULT([yes])
+        else
+          AC_MSG_RESULT([no])
+          AVAILABLE=false
+        fi
+      ],
+      IF_ENABLED: [
+        USAN_FLAGS="-fsanitize=undefined"
+        USAN_CFLAGS="$USAN_FLAGS -fno-omit-frame-pointer"
+        USAN_LDFLAGS="$USAN_FLAGS"
+        JVM_CFLAGS="$JVM_CFLAGS $USAN_CFLAGS"
+        JVM_LDFLAGS="$JVM_LDFLAGS $USAN_LDFLAGS"
+        CFLAGS_JDKLIB="$CFLAGS_JDKLIB $USAN_CFLAGS"
+        CFLAGS_JDKEXE="$CFLAGS_JDKEXE $USAN_CFLAGS"
+        CXXFLAGS_JDKLIB="$CXXFLAGS_JDKLIB $USAN_CFLAGS"
+        CXXFLAGS_JDKEXE="$CXXFLAGS_JDKEXE $USAN_CFLAGS"
+        LDFLAGS_JDKLIB="$LDFLAGS_JDKLIB $USAN_LDFLAGS"
+        LDFLAGS_JDKEXE="$LDFLAGS_JDKEXE $USAN_LDFLAGS"
+        USAN_ENABLED="yes"
+      ],
+      IF_DISABLED: [
+        USAN_ENABLED="no"
+      ])
+
+  AC_SUBST(USAN_ENABLED)
+])
+
 ################################################################################
 #
 # Static build support.  When enabled will generate static
@@ -585,6 +615,30 @@ AC_DEFUN([JDKOPT_ENABLE_DISABLE_CDS_ARCHIVE],
  AC_SUBST(BUILD_CDS_ARCHIVE)
 ])

+################################################################################
+#
+# Enable the alternative CDS core region alignment
+#
+AC_DEFUN([JDKOPT_ENABLE_DISABLE_COMPATIBLE_CDS_ALIGNMENT],
+[
+  UTIL_ARG_ENABLE(NAME: compatible-cds-alignment, DEFAULT: false,
+      RESULT: ENABLE_COMPATIBLE_CDS_ALIGNMENT,
+      DESC: [enable use alternative compatible cds core region alignment],
+      DEFAULT_DESC: [disabled],
+      CHECKING_MSG: [if compatible cds region alignment enabled],
+      CHECK_AVAILABLE: [
+        AC_MSG_CHECKING([if CDS archive is available])
+        if test "x$ENABLE_CDS" = "xfalse"; then
+          AVAILABLE=false
+          AC_MSG_RESULT([no (CDS is disabled)])
+        else
+          AVAILABLE=true
+          AC_MSG_RESULT([yes])
+        fi
+      ])
+  AC_SUBST(ENABLE_COMPATIBLE_CDS_ALIGNMENT)
+])
+
 ################################################################################
 #
 # Disallow any output from containing absolute paths from the build system.
@@ -640,7 +694,7 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_REPRODUCIBLE_BUILD],
    SOURCE_DATE=$($DATE +"%s")
    AC_MSG_RESULT([$SOURCE_DATE, from 'current'])
  elif test "x$with_source_date" = xversion; then
-    # Use the date from version-numbers
+    # Use the date from version-numbers.conf
    UTIL_GET_EPOCH_TIMESTAMP(SOURCE_DATE, $DEFAULT_VERSION_DATE)
    if test "x$SOURCE_DATE" = x; then
      AC_MSG_RESULT([unavailable])
--- a/make/autoconf/jdk-version.m4
+++ b/make/autoconf/jdk-version.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -58,7 +58,9 @@ AC_DEFUN([JDKVER_CHECK_AND_SET_NUMBER],
 AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
 [
  # Source the version numbers file
-  . $AUTOCONF_DIR/version-numbers
+  . $TOPDIR/make/conf/version-numbers.conf
+  # Source the branding file
+  . $TOPDIR/make/conf/branding.conf

  # Some non-version number information is set in that file
  AC_SUBST(LAUNCHER_NAME)
@@ -79,7 +81,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
    # Set JDK_RC_NAME to a custom value if '--with-jdk-rc-name' was used and is not empty.
    JDK_RC_NAME="$with_jdk_rc_name"
  else
-    # Otherwise calculate from "version-numbers" included above.
+    # Otherwise calculate from "branding.conf" included above.
    JDK_RC_NAME="$PRODUCT_NAME $JDK_RC_PLATFORM_NAME"
  fi
  AC_SUBST(JDK_RC_NAME)
@@ -94,7 +96,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
    AC_MSG_ERROR([--with-vendor-name contains non-printing characters: $with_vendor_name])
  elif test "x$with_vendor_name" != x; then
    # Only set COMPANY_NAME if '--with-vendor-name' was used and is not empty.
-    # Otherwise we will use the value from "version-numbers" included above.
+    # Otherwise we will use the value from "branding.conf" included above.
    COMPANY_NAME="$with_vendor_name"
  fi
  AC_SUBST(COMPANY_NAME)
@@ -108,7 +110,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
    AC_MSG_ERROR([--with-vendor-url contains non-printing characters: $with_vendor_url])
  elif test "x$with_vendor_url" != x; then
    # Only set VENDOR_URL if '--with-vendor-url' was used and is not empty.
-    # Otherwise we will use the value from "version-numbers" included above.
+    # Otherwise we will use the value from "branding.conf" included above.
    VENDOR_URL="$with_vendor_url"
  fi
  AC_SUBST(VENDOR_URL)
@@ -122,7 +124,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
    AC_MSG_ERROR([--with-vendor-bug-url contains non-printing characters: $with_vendor_bug_url])
  elif test "x$with_vendor_bug_url" != x; then
    # Only set VENDOR_URL_BUG if '--with-vendor-bug-url' was used and is not empty.
-    # Otherwise we will use the value from "version-numbers" included above.
+    # Otherwise we will use the value from "branding.conf" included above.
    VENDOR_URL_BUG="$with_vendor_bug_url"
  fi
  AC_SUBST(VENDOR_URL_BUG)
@@ -136,7 +138,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
    AC_MSG_ERROR([--with-vendor-vm-bug-url contains non-printing characters: $with_vendor_vm_bug_url])
  elif test "x$with_vendor_vm_bug_url" != x; then
    # Only set VENDOR_URL_VM_BUG if '--with-vendor-vm-bug-url' was used and is not empty.
-    # Otherwise we will use the value from "version-numbers" included above.
+    # Otherwise we will use the value from "branding.conf" included above.
    VENDOR_URL_VM_BUG="$with_vendor_vm_bug_url"
  fi
  AC_SUBST(VENDOR_URL_VM_BUG)
@@ -280,7 +282,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
    fi
  else
    if test "x$NO_DEFAULT_VERSION_PARTS" != xtrue; then
-      # Default is to get value from version-numbers
+      # Default is to get value from version-numbers.conf
      VERSION_FEATURE="$DEFAULT_VERSION_FEATURE"
    fi
  fi
@@ -523,7 +525,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
    MACOSX_BUNDLE_BUILD_VERSION="$VERSION_BUILD"
    # If VERSION_OPT consists of only numbers and periods, add it.
    if [ [[ $VERSION_OPT =~ ^[0-9\.]+$ ]] ]; then
-      MACOSX_BUNDLE_BUILD_VERSION+=".$VERSION_OPT"
+      MACOSX_BUNDLE_BUILD_VERSION="$MACOSX_BUNDLE_BUILD_VERSION.$VERSION_OPT"
    fi
  fi
  AC_SUBST(MACOSX_BUNDLE_BUILD_VERSION)
@@ -531,6 +533,7 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
  # We could define --with flags for these, if really needed
  VERSION_CLASSFILE_MAJOR="$DEFAULT_VERSION_CLASSFILE_MAJOR"
  VERSION_CLASSFILE_MINOR="$DEFAULT_VERSION_CLASSFILE_MINOR"
+  VERSION_DOCS_API_SINCE="$DEFAULT_VERSION_DOCS_API_SINCE"
  JDK_SOURCE_TARGET_VERSION="$DEFAULT_JDK_SOURCE_TARGET_VERSION"

  AC_MSG_CHECKING([for version string])
@@ -555,5 +558,6 @@ AC_DEFUN_ONCE([JDKVER_SETUP_JDK_VERSION_NUMBERS],
  AC_SUBST(VENDOR_VERSION_STRING)
  AC_SUBST(VERSION_CLASSFILE_MAJOR)
  AC_SUBST(VERSION_CLASSFILE_MINOR)
+  AC_SUBST(VERSION_DOCS_API_SINCE)
  AC_SUBST(JDK_SOURCE_TARGET_VERSION)
 ])
--- a/make/autoconf/jvm-features.m4
+++ b/make/autoconf/jvm-features.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -44,7 +44,7 @@
 m4_define(jvm_features_valid, m4_normalize( \
    ifdef([custom_jvm_features_valid], custom_jvm_features_valid) \
    \
-    aot cds compiler1 compiler2 dtrace epsilongc g1gc graal jfr jni-check \
+    cds compiler1 compiler2 dtrace epsilongc g1gc jfr jni-check \
    jvmci jvmti link-time-opt management minimal nmt opt-size parallelgc \
    serialgc services shenandoahgc static-build vm-structs zero zgc \
 ))
@@ -55,14 +55,12 @@ m4_define(jvm_features_deprecated, m4_normalize(
 ))

 # Feature descriptions
-m4_define(jvm_feature_desc_aot, [enable ahead of time compilation (AOT)])
 m4_define(jvm_feature_desc_cds, [enable class data sharing (CDS)])
 m4_define(jvm_feature_desc_compiler1, [enable hotspot compiler C1])
 m4_define(jvm_feature_desc_compiler2, [enable hotspot compiler C2])
 m4_define(jvm_feature_desc_dtrace, [enable dtrace support])
 m4_define(jvm_feature_desc_epsilongc, [include the epsilon (no-op) garbage collector])
 m4_define(jvm_feature_desc_g1gc, [include the G1 garbage collector])
-m4_define(jvm_feature_desc_graal, [enable Graal (jdk.internal.vm.compiler)])
 m4_define(jvm_feature_desc_jfr, [enable JDK Flight Recorder (JFR)])
 m4_define(jvm_feature_desc_jni_check, [enable -Xcheck:jni support])
 m4_define(jvm_feature_desc_jvmci, [enable JVM Compiler Interface (JVMCI)])
@@ -94,7 +92,6 @@ AC_DEFUN_ONCE([JVM_FEATURES_PARSE_OPTIONS],

  # For historical reasons, some jvm features have their own, shorter names.
  # Keep those as aliases for the --enable-jvm-feature-* style arguments.
-  UTIL_ALIASED_ARG_ENABLE(aot, --enable-jvm-feature-aot)
  UTIL_ALIASED_ARG_ENABLE(cds, --enable-jvm-feature-cds)
  UTIL_ALIASED_ARG_ENABLE(dtrace, --enable-jvm-feature-dtrace)

@@ -229,34 +226,6 @@ AC_DEFUN([JVM_FEATURES_CHECK_AVAILABILITY],
  fi
 ])

-###############################################################################
-# Check if the feature 'aot' is available on this platform.
-#
-AC_DEFUN_ONCE([JVM_FEATURES_CHECK_AOT],
-[
-  JVM_FEATURES_CHECK_AVAILABILITY(aot, [
-    AC_MSG_CHECKING([if platform is supported by AOT])
-    # AOT is only available where JVMCI is available since it requires JVMCI.
-    if test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
-      AC_MSG_RESULT([yes])
-    elif test "x$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU" = "xlinux-aarch64"; then
-      AC_MSG_RESULT([yes])
-    else
-      AC_MSG_RESULT([no, $OPENJDK_TARGET_CPU])
-      AVAILABLE=false
-    fi
-
-    AC_MSG_CHECKING([if AOT source code is present])
-    if test -e "${TOPDIR}/src/jdk.internal.vm.compiler" && \
-        test -e "${TOPDIR}/src/jdk.aot"; then
-      AC_MSG_RESULT([yes])
-    else
-      AC_MSG_RESULT([no, missing src/jdk.internal.vm.compiler or src/jdk.aot])
-      AVAILABLE=false
-    fi
-  ])
-])
-
 ###############################################################################
 # Check if the feature 'cds' is available on this platform.
 #
@@ -264,11 +233,11 @@ AC_DEFUN_ONCE([JVM_FEATURES_CHECK_CDS],
 [
  JVM_FEATURES_CHECK_AVAILABILITY(cds, [
    AC_MSG_CHECKING([if platform is supported by CDS])
-    if test "x$OPENJDK_TARGET_OS" != xaix; then
-      AC_MSG_RESULT([yes])
-    else
-      AC_MSG_RESULT([no, $OPENJDK_TARGET_OS])
+    if test "x$OPENJDK_TARGET_OS" = xaix; then
+      AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
      AVAILABLE=false
+    else
+      AC_MSG_RESULT([yes])
    fi
  ])
 ])
@@ -296,25 +265,6 @@ AC_DEFUN_ONCE([JVM_FEATURES_CHECK_DTRACE],
  ])
 ])

-###############################################################################
-# Check if the feature 'graal' is available on this platform.
-#
-AC_DEFUN_ONCE([JVM_FEATURES_CHECK_GRAAL],
-[
-  JVM_FEATURES_CHECK_AVAILABILITY(graal, [
-    AC_MSG_CHECKING([if platform is supported by Graal])
-    # Graal is only available where JVMCI is available since it requires JVMCI.
-    if test "x$OPENJDK_TARGET_CPU" = "xx86_64"; then
-      AC_MSG_RESULT([yes])
-    elif test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
-      AC_MSG_RESULT([yes])
-    else
-      AC_MSG_RESULT([no, $OPENJDK_TARGET_CPU])
-      AVAILABLE=false
-    fi
-  ])
-])
-
 ###############################################################################
 # Check if the feature 'jfr' is available on this platform.
 #
@@ -400,7 +350,8 @@ AC_DEFUN_ONCE([JVM_FEATURES_CHECK_ZGC],
      fi
    elif test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
      if test "x$OPENJDK_TARGET_OS" = "xlinux" || \
-          test "x$OPENJDK_TARGET_OS" = "xwindows"; then
+          test "x$OPENJDK_TARGET_OS" = "xwindows" || \
+          test "x$OPENJDK_TARGET_OS" = "xmacosx"; then
        AC_MSG_RESULT([yes])
      else
        AC_MSG_RESULT([no, $OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
@@ -439,10 +390,8 @@ AC_DEFUN_ONCE([JVM_FEATURES_PREPARE_PLATFORM],
  # The checks below should add unavailable features to
  # JVM_FEATURES_PLATFORM_UNAVAILABLE.

-  JVM_FEATURES_CHECK_AOT
  JVM_FEATURES_CHECK_CDS
  JVM_FEATURES_CHECK_DTRACE
-  JVM_FEATURES_CHECK_GRAAL
  JVM_FEATURES_CHECK_JFR
  JVM_FEATURES_CHECK_JVMCI
  JVM_FEATURES_CHECK_SHENANDOAHGC
@@ -475,18 +424,18 @@ AC_DEFUN([JVM_FEATURES_PREPARE_VARIANT],
  elif test "x$variant" = "xcore"; then
    JVM_FEATURES_VARIANT_UNAVAILABLE="cds minimal zero"
  elif test "x$variant" = "xzero"; then
-    JVM_FEATURES_VARIANT_UNAVAILABLE="aot cds compiler1 compiler2 \
-        graal jvmci minimal zgc"
+    JVM_FEATURES_VARIANT_UNAVAILABLE="cds compiler1 compiler2 \
+        jvmci minimal zgc"
  else
    JVM_FEATURES_VARIANT_UNAVAILABLE="minimal zero"
  fi

  # Check which features should be off by default for this JVM variant.
  if test "x$variant" = "xclient"; then
-    JVM_FEATURES_VARIANT_FILTER="aot compiler2 graal jvmci link-time-opt opt-size"
+    JVM_FEATURES_VARIANT_FILTER="compiler2 jvmci link-time-opt opt-size"
  elif test "x$variant" = "xminimal"; then
-    JVM_FEATURES_VARIANT_FILTER="aot cds compiler2 dtrace epsilongc g1gc \
-        graal jfr jni-check jvmci jvmti management nmt parallelgc services \
+    JVM_FEATURES_VARIANT_FILTER="cds compiler2 dtrace epsilongc g1gc \
+        jfr jni-check jvmci jvmti management nmt parallelgc services \
        shenandoahgc vm-structs zgc"
    if test "x$OPENJDK_TARGET_CPU" = xarm ; then
      JVM_FEATURES_VARIANT_FILTER="$JVM_FEATURES_VARIANT_FILTER opt-size"
@@ -496,7 +445,7 @@ AC_DEFUN([JVM_FEATURES_PREPARE_VARIANT],
          link-time-opt"
    fi
  elif test "x$variant" = "xcore"; then
-    JVM_FEATURES_VARIANT_FILTER="aot compiler1 compiler2 graal jvmci \
+    JVM_FEATURES_VARIANT_FILTER="compiler1 compiler2 jvmci \
        link-time-opt opt-size"
  elif test "x$variant" = "xzero"; then
    JVM_FEATURES_VARIANT_FILTER="jfr link-time-opt opt-size"
@@ -572,15 +521,6 @@ AC_DEFUN([JVM_FEATURES_VERIFY],
 [
  variant=$1

-  # Verify that dependencies are met for inter-feature relations.
-  if JVM_FEATURES_IS_ACTIVE(aot) && ! JVM_FEATURES_IS_ACTIVE(graal); then
-    AC_MSG_ERROR([Specified JVM feature 'aot' requires feature 'graal' for variant '$variant'])
-  fi
-
-  if JVM_FEATURES_IS_ACTIVE(graal) && ! JVM_FEATURES_IS_ACTIVE(jvmci); then
-    AC_MSG_ERROR([Specified JVM feature 'graal' requires feature 'jvmci' for variant '$variant'])
-  fi
-
  if JVM_FEATURES_IS_ACTIVE(jvmci) && ! (JVM_FEATURES_IS_ACTIVE(compiler1) || \
      JVM_FEATURES_IS_ACTIVE(compiler2)); then
    AC_MSG_ERROR([Specified JVM feature 'jvmci' requires feature 'compiler2' or 'compiler1' for variant '$variant'])
@@ -596,18 +536,15 @@ AC_DEFUN([JVM_FEATURES_VERIFY],

  # For backwards compatibility, disable a feature "globally" if one variant
  # is missing the feature.
-  if ! JVM_FEATURES_IS_ACTIVE(aot); then
-    ENABLE_AOT="false"
-  fi
  if ! JVM_FEATURES_IS_ACTIVE(cds); then
    ENABLE_CDS="false"
  fi
-  if ! JVM_FEATURES_IS_ACTIVE(graal); then
-    INCLUDE_GRAAL="false"
-  fi
  if ! JVM_FEATURES_IS_ACTIVE(jvmci); then
    INCLUDE_JVMCI="false"
  fi
+  if JVM_FEATURES_IS_ACTIVE(compiler2); then
+    INCLUDE_COMPILER2="true"
+  fi

  # Verify that we have at least one gc selected (i.e., feature named "*gc").
  if ! JVM_FEATURES_IS_ACTIVE(.*gc); then
@@ -629,10 +566,9 @@ AC_DEFUN_ONCE([JVM_FEATURES_SETUP],
  # For backwards compatibility, tentatively enable these features "globally",
  # and disable them in JVM_FEATURES_VERIFY if a variant is found that are
  # missing any of them.
-  ENABLE_AOT="true"
  ENABLE_CDS="true"
-  INCLUDE_GRAAL="true"
  INCLUDE_JVMCI="true"
+  INCLUDE_COMPILER2="false"

  for variant in $JVM_VARIANTS; do
    # Figure out if any features are unavailable, or should be filtered out
@@ -668,8 +604,7 @@ AC_DEFUN_ONCE([JVM_FEATURES_SETUP],
  AC_SUBST(JVM_FEATURES_zero)
  AC_SUBST(JVM_FEATURES_custom)

-  AC_SUBST(ENABLE_AOT)
-  AC_SUBST(INCLUDE_GRAAL)
  AC_SUBST(INCLUDE_JVMCI)
+  AC_SUBST(INCLUDE_COMPILER2)

 ])
--- a/make/autoconf/lib-freetype.m4
+++ b/make/autoconf/lib-freetype.m4
@@ -192,6 +192,16 @@ AC_DEFUN_ONCE([LIB_SETUP_FREETYPE],
              [$FREETYPE_BASE_DIR/lib], [well-known location])
        fi

+        if test "x$FOUND_FREETYPE" != "xyes" ; then
+          LIB_CHECK_POTENTIAL_FREETYPE([$FREETYPE_BASE_DIR/include],
+              [$FREETYPE_BASE_DIR/lib/$OPENJDK_TARGET_CPU-$OPENJDK_TARGET_OS-$OPENJDK_TARGET_ABI], [well-known location])
+        fi
+
+        if test "x$FOUND_FREETYPE" != "xyes" ; then
+          LIB_CHECK_POTENTIAL_FREETYPE([$FREETYPE_BASE_DIR/include],
+              [$FREETYPE_BASE_DIR/lib/$OPENJDK_TARGET_CPU_AUTOCONF-$OPENJDK_TARGET_OS-$OPENJDK_TARGET_ABI], [well-known location])
+        fi
+
        if test "x$FOUND_FREETYPE" != "xyes" ; then
          FREETYPE_BASE_DIR="$SYSROOT/usr/X11"
          LIB_CHECK_POTENTIAL_FREETYPE([$FREETYPE_BASE_DIR/include],
--- a/make/autoconf/lib-tests.m4
+++ b/make/autoconf/lib-tests.m4
@@ -23,38 +23,6 @@
 # questions.
 #

-###############################################################################
-#
-# Check for graalunit libs, needed for running graalunit tests.
-#
-AC_DEFUN_ONCE([LIB_TESTS_SETUP_GRAALUNIT],
-[
-  AC_ARG_WITH(graalunit-lib, [AS_HELP_STRING([--with-graalunit-lib],
-      [specify location of 3rd party libraries used by Graal unit tests])])
-
-  GRAALUNIT_LIB=
-  if test "x${with_graalunit_lib}" != x; then
-    AC_MSG_CHECKING([for graalunit libs])
-    if test "x${with_graalunit_lib}" = xno; then
-      AC_MSG_RESULT([disabled, graalunit tests can not be run])
-    elif test "x${with_graalunit_lib}" = xyes; then
-      AC_MSG_RESULT([not specified])
-      AC_MSG_ERROR([You must specify the path to 3rd party libraries used by Graal unit tests])
-    else
-      GRAALUNIT_LIB="${with_graalunit_lib}"
-      if test ! -d "${GRAALUNIT_LIB}"; then
-        AC_MSG_RESULT([no])
-        AC_MSG_ERROR([Could not find graalunit 3rd party libraries as specified. (${with_graalunit_lib})])
-      else
-        AC_MSG_RESULT([$GRAALUNIT_LIB])
-      fi
-    fi
-  fi
-
-  UTIL_FIXUP_PATH([GRAALUNIT_LIB])
-  AC_SUBST(GRAALUNIT_LIB)
-])
-
 ###############################################################################
 #
 # Setup and check for gtest framework source files
--- a/make/autoconf/lib-x11.m4
+++ b/make/autoconf/lib-x11.m4
@@ -68,6 +68,10 @@ AC_DEFUN_ONCE([LIB_SETUP_X11],
            x_libraries="$SYSROOT/usr/lib64"
          elif test -f "$SYSROOT/usr/lib/libX11.so"; then
            x_libraries="$SYSROOT/usr/lib"
+          elif test -f "$SYSROOT/usr/lib/$OPENJDK_TARGET_CPU-$OPENJDK_TARGET_OS-$OPENJDK_TARGET_ABI/libX11.so"; then
+            x_libraries="$SYSROOT/usr/lib/$OPENJDK_TARGET_CPU-$OPENJDK_TARGET_OS-$OPENJDK_TARGET_ABI/libX11.so"
+          elif test -f "$SYSROOT/usr/lib/$OPENJDK_TARGET_CPU_AUTOCONF-$OPENJDK_TARGET_OS-$OPENJDK_TARGET_ABI/libX11.so"; then
+            x_libraries="$SYSROOT/usr/lib/$OPENJDK_TARGET_CPU_AUTOCONF-$OPENJDK_TARGET_OS-$OPENJDK_TARGET_ABI/libX11.so"
          fi
        fi
      fi
--- a/make/autoconf/libraries.m4
+++ b/make/autoconf/libraries.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -43,11 +43,9 @@ AC_DEFUN_ONCE([LIB_DETERMINE_DEPENDENCIES],
  if test "x$OPENJDK_TARGET_OS" = xwindows || test "x$OPENJDK_TARGET_OS" = xmacosx; then
    # No X11 support on windows or macosx
    NEEDS_LIB_X11=false
-  elif test "x$ENABLE_HEADLESS_ONLY" = xtrue; then
-    # No X11 support needed when building headless only
-    NEEDS_LIB_X11=false
  else
-    # All other instances need X11
+    # All other instances need X11, even if building headless only, libawt still
+    # needs X11 headers.
    NEEDS_LIB_X11=true
  fi

@@ -103,7 +101,6 @@ AC_DEFUN_ONCE([LIB_SETUP_LIBRARIES],
  LIB_SETUP_LIBFFI
  LIB_SETUP_BUNDLED_LIBS
  LIB_SETUP_MISC_LIBS
-  LIB_TESTS_SETUP_GRAALUNIT
  LIB_TESTS_SETUP_GTEST

  BASIC_JDKLIB_LIBS=""
@@ -124,12 +121,27 @@ AC_DEFUN_ONCE([LIB_SETUP_LIBRARIES],
    BASIC_JVM_LIBS="$BASIC_JVM_LIBS -lpthread"
  fi

-  # Libatomic library
-  # 32-bit MIPS needs fallback library for 8-byte atomic ops
-  if test "x$OPENJDK_TARGET_OS" = xlinux &&
-      (test "x$OPENJDK_TARGET_CPU" = xmips ||
-       test "x$OPENJDK_TARGET_CPU" = xmipsel); then
-    BASIC_JVM_LIBS="$BASIC_JVM_LIBS -latomic"
+  # librt for legacy clock_gettime
+  if test "x$OPENJDK_TARGET_OS" = xlinux; then
+    # Hotspot needs to link librt to get the clock_* functions.
+    # But once our supported minimum build and runtime platform
+    # has glibc 2.17, this can be removed as the functions are
+    # in libc.
+    BASIC_JVM_LIBS="$BASIC_JVM_LIBS -lrt"
+  fi
+
+  # Atomic library
+  # 32-bit platforms needs fallback library for 8-byte atomic ops on Zero
+  if HOTSPOT_CHECK_JVM_VARIANT(zero); then
+    if test "x$OPENJDK_TARGET_OS" = xlinux &&
+        (test "x$OPENJDK_TARGET_CPU" = xarm ||
+         test "x$OPENJDK_TARGET_CPU" = xm68k ||
+         test "x$OPENJDK_TARGET_CPU" = xmips ||
+         test "x$OPENJDK_TARGET_CPU" = xmipsel ||
+         test "x$OPENJDK_TARGET_CPU" = xppc ||
+         test "x$OPENJDK_TARGET_CPU" = xsh); then
+      BASIC_JVM_LIBS="$BASIC_JVM_LIBS -latomic"
+    fi
  fi

  # perfstat lib
--- a/make/autoconf/platform.m4
+++ b/make/autoconf/platform.m4
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -72,6 +72,12 @@ AC_DEFUN([PLATFORM_EXTRACT_VARS_FROM_CPU],
      VAR_CPU_BITS=64
      VAR_CPU_ENDIAN=little
      ;;
+    loongarch64)
+      VAR_CPU=loongarch64
+      VAR_CPU_ARCH=loongarch
+      VAR_CPU_BITS=64
+      VAR_CPU_ENDIAN=little
+      ;;
    m68k)
      VAR_CPU=m68k
      VAR_CPU_ARCH=m68k
@@ -238,6 +244,33 @@ AC_DEFUN([PLATFORM_EXTRACT_VARS_FROM_LIBC],
  esac
 ])

+# Support macro for PLATFORM_EXTRACT_TARGET_AND_BUILD.
+# Converts autoconf style OS name to OpenJDK style, into
+# VAR_ABI.
+AC_DEFUN([PLATFORM_EXTRACT_VARS_FROM_ABI],
+[
+  case "$1" in
+    *linux*-musl)
+      VAR_ABI=musl
+      ;;
+    *linux*-gnu)
+      VAR_ABI=gnu
+      ;;
+    *linux*-gnueabi)
+      VAR_ABI=gnueabi
+      ;;
+    *linux*-gnueabihf)
+      VAR_ABI=gnueabihf
+      ;;
+    *linux*-gnuabi64)
+      VAR_ABI=gnuabi64
+      ;;
+    *)
+      VAR_ABI=default
+      ;;
+  esac
+])
+
 # Expects $host_os $host_cpu $build_os and $build_cpu
 # and $with_target_bits to have been setup!
 #
@@ -259,6 +292,7 @@ AC_DEFUN([PLATFORM_EXTRACT_TARGET_AND_BUILD],
  PLATFORM_EXTRACT_VARS_FROM_OS($build_os)
  PLATFORM_EXTRACT_VARS_FROM_CPU($build_cpu)
  PLATFORM_EXTRACT_VARS_FROM_LIBC($build_os)
+  PLATFORM_EXTRACT_VARS_FROM_ABI($build_os)
  # ..and setup our own variables. (Do this explicitly to facilitate searching)
  OPENJDK_BUILD_OS="$VAR_OS"
  if test "x$VAR_OS_TYPE" != x; then
@@ -275,7 +309,9 @@ AC_DEFUN([PLATFORM_EXTRACT_TARGET_AND_BUILD],
  OPENJDK_BUILD_CPU_ARCH="$VAR_CPU_ARCH"
  OPENJDK_BUILD_CPU_BITS="$VAR_CPU_BITS"
  OPENJDK_BUILD_CPU_ENDIAN="$VAR_CPU_ENDIAN"
+  OPENJDK_BUILD_CPU_AUTOCONF="$build_cpu"
  OPENJDK_BUILD_LIBC="$VAR_LIBC"
+  OPENJDK_BUILD_ABI="$VAR_ABI"
  AC_SUBST(OPENJDK_BUILD_OS)
  AC_SUBST(OPENJDK_BUILD_OS_TYPE)
  AC_SUBST(OPENJDK_BUILD_OS_ENV)
@@ -283,7 +319,9 @@ AC_DEFUN([PLATFORM_EXTRACT_TARGET_AND_BUILD],
  AC_SUBST(OPENJDK_BUILD_CPU_ARCH)
  AC_SUBST(OPENJDK_BUILD_CPU_BITS)
  AC_SUBST(OPENJDK_BUILD_CPU_ENDIAN)
+  AC_SUBST(OPENJDK_BUILD_CPU_AUTOCONF)
  AC_SUBST(OPENJDK_BUILD_LIBC)
+  AC_SUBST(OPENJDK_BUILD_ABI)

  AC_MSG_CHECKING([openjdk-build os-cpu])
  AC_MSG_RESULT([$OPENJDK_BUILD_OS-$OPENJDK_BUILD_CPU])
@@ -297,6 +335,7 @@ AC_DEFUN([PLATFORM_EXTRACT_TARGET_AND_BUILD],
  PLATFORM_EXTRACT_VARS_FROM_OS($host_os)
  PLATFORM_EXTRACT_VARS_FROM_CPU($host_cpu)
  PLATFORM_EXTRACT_VARS_FROM_LIBC($host_os)
+  PLATFORM_EXTRACT_VARS_FROM_ABI($host_os)
  # ... and setup our own variables. (Do this explicitly to facilitate searching)
  OPENJDK_TARGET_OS="$VAR_OS"
  if test "x$VAR_OS_TYPE" != x; then
@@ -313,8 +352,10 @@ AC_DEFUN([PLATFORM_EXTRACT_TARGET_AND_BUILD],
  OPENJDK_TARGET_CPU_ARCH="$VAR_CPU_ARCH"
  OPENJDK_TARGET_CPU_BITS="$VAR_CPU_BITS"
  OPENJDK_TARGET_CPU_ENDIAN="$VAR_CPU_ENDIAN"
+  OPENJDK_TARGET_CPU_AUTOCONF="$host_cpu"
  OPENJDK_TARGET_OS_UPPERCASE=`$ECHO $OPENJDK_TARGET_OS | $TR 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
  OPENJDK_TARGET_LIBC="$VAR_LIBC"
+  OPENJDK_TARGET_ABI="$VAR_ABI"

  AC_SUBST(OPENJDK_TARGET_OS)
  AC_SUBST(OPENJDK_TARGET_OS_TYPE)
@@ -324,7 +365,9 @@ AC_DEFUN([PLATFORM_EXTRACT_TARGET_AND_BUILD],
  AC_SUBST(OPENJDK_TARGET_CPU_ARCH)
  AC_SUBST(OPENJDK_TARGET_CPU_BITS)
  AC_SUBST(OPENJDK_TARGET_CPU_ENDIAN)
+  AC_SUBST(OPENJDK_TARGET_CPU_AUTOCONF)
  AC_SUBST(OPENJDK_TARGET_LIBC)
+  AC_SUBST(OPENJDK_TARGET_ABI)

  AC_MSG_CHECKING([openjdk-target os-cpu])
  AC_MSG_RESULT([$OPENJDK_TARGET_OS-$OPENJDK_TARGET_CPU])
@@ -443,9 +486,11 @@ AC_DEFUN([PLATFORM_SETUP_LEGACY_VARS_HELPER],
  fi

  # The new version string in JDK 9 also defined new naming of OS and ARCH for bundles
-  # Macosx is osx and x86_64 is x64
+  # The macOS bundle name was revised in JDK 17
+  #
+  # macosx is macos and x86_64 is x64
  if test "x$OPENJDK_$1_OS" = xmacosx; then
-    OPENJDK_$1_OS_BUNDLE="osx"
+    OPENJDK_$1_OS_BUNDLE="macos"
  else
    OPENJDK_$1_OS_BUNDLE="$OPENJDK_TARGET_OS"
  fi
--- a/make/autoconf/spec.gmk.in
+++ b/make/autoconf/spec.gmk.in
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2011, 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -54,6 +54,9 @@ MAKE := @MAKE@
 # Make sure all shell commands are executed with the C locale
 export LC_ALL := C

+# Make sure we override any local CLASSPATH variable
+export CLASSPATH := @CLASSPATH@
+
 # The default make arguments
 MAKE_ARGS = $(MAKE_LOG_FLAGS) -r -R -I $(TOPDIR)/make/common SPEC=$(SPEC) \
    MAKE_LOG_FLAGS="$(MAKE_LOG_FLAGS)" $(MAKE_LOG_VARS)
@@ -230,6 +233,9 @@ VENDOR_VERSION_STRING := @VENDOR_VERSION_STRING@
 VERSION_CLASSFILE_MAJOR := @VERSION_CLASSFILE_MAJOR@
 VERSION_CLASSFILE_MINOR := @VERSION_CLASSFILE_MINOR@

+# Version for API docs "new-since" feature
+VERSION_DOCS_API_SINCE := @VERSION_DOCS_API_SINCE@
+
 JDK_SOURCE_TARGET_VERSION := @JDK_SOURCE_TARGET_VERSION@

 # Convenience CFLAGS settings for passing version information into native programs.
@@ -255,7 +261,7 @@ VERSION_CFLAGS := \
    #

 ifneq ($(COMPANY_NAME),)
-  # COMPANY_NAME is set to "N/A" in $AUTOCONF_DIR/version-numbers by default,
+  # COMPANY_NAME is set to "N/A" in make/conf/branding.conf by default,
  # but can be customized with the '--with-vendor-name' configure option.
  # Only export "VENDOR" to the build if COMPANY_NAME contains a real value.
  # Otherwise the default value for VENDOR, which is used to set the "java.vendor"
@@ -349,6 +355,8 @@ BUILD_MANPAGES := @BUILD_MANPAGES@

 BUILD_CDS_ARCHIVE := @BUILD_CDS_ARCHIVE@

+ENABLE_COMPATIBLE_CDS_ALIGNMENT := @ENABLE_COMPATIBLE_CDS_ALIGNMENT@
+
 ALLOW_ABSOLUTE_PATHS_IN_OUTPUT := @ALLOW_ABSOLUTE_PATHS_IN_OUTPUT@

 # The boot jdk to use. This is overridden in bootcycle-spec.gmk. Make sure to keep
@@ -390,7 +398,6 @@ LIBFFI_LIBS:=@LIBFFI_LIBS@
 LIBFFI_CFLAGS:=@LIBFFI_CFLAGS@
 ENABLE_LIBFFI_BUNDLING:=@ENABLE_LIBFFI_BUNDLING@
 LIBFFI_LIB_FILE:=@LIBFFI_LIB_FILE@
-GRAALUNIT_LIB := @GRAALUNIT_LIB@
 FILE_MACRO_CFLAGS := @FILE_MACRO_CFLAGS@

 STATIC_LIBS_CFLAGS := @STATIC_LIBS_CFLAGS@
@@ -419,7 +426,16 @@ JCOV_FILTERS=@JCOV_FILTERS@
 export ASAN_ENABLED:=@ASAN_ENABLED@
 export DEVKIT_LIB_DIR:=@DEVKIT_LIB_DIR@
 ifeq ($(ASAN_ENABLED), yes)
-  export ASAN_OPTIONS=handle_segv=0 detect_leaks=0
+  export ASAN_OPTIONS=handle_segv=0:handle_sigfpe=0:detect_leaks=false
+  ifneq ($(DEVKIT_LIB_DIR),)
+    export LD_LIBRARY_PATH:=$(LD_LIBRARY_PATH):$(DEVKIT_LIB_DIR)
+  endif
+endif
+
+# UndefinedBehaviorSanitizer
+export USAN_ENABLED:=@USAN_ENABLED@
+export DEVKIT_LIB_DIR:=@DEVKIT_LIB_DIR@
+ifeq ($(USAN_ENABLED), yes)
  ifneq ($(DEVKIT_LIB_DIR),)
    export LD_LIBRARY_PATH:=$(LD_LIBRARY_PATH):$(DEVKIT_LIB_DIR)
  endif
@@ -475,8 +491,7 @@ CXX_O_FLAG_NORM:=@CXX_O_FLAG_NORM@
 CXX_O_FLAG_NONE:=@CXX_O_FLAG_NONE@
 CXX_O_FLAG_SIZE:=@CXX_O_FLAG_SIZE@

-C_FLAG_DEPS:=@C_FLAG_DEPS@
-CXX_FLAG_DEPS:=@CXX_FLAG_DEPS@
+GENDEPS_FLAGS := @GENDEPS_FLAGS@

 DISABLE_WARNING_PREFIX := @DISABLE_WARNING_PREFIX@
 CFLAGS_WARNINGS_ARE_ERRORS:=@CFLAGS_WARNINGS_ARE_ERRORS@
@@ -508,6 +523,8 @@ JVM_LDFLAGS := @JVM_LDFLAGS@
 JVM_ASFLAGS := @JVM_ASFLAGS@
 JVM_LIBS := @JVM_LIBS@

+BASIC_ASFLAGS := @BASIC_ASFLAGS@
+
 # These flags might contain variables set by a custom extension that is included later.
 EXTRA_CFLAGS = @EXTRA_CFLAGS@
 EXTRA_CXXFLAGS = @EXTRA_CXXFLAGS@
@@ -521,9 +538,6 @@ CPP := @CPP@
 # The linker can be gcc or ld on unix systems, or link.exe on windows systems.
 LD := @LD@

-# Linker used by the jaotc tool for AOT compilation.
-LD_JAOTC:=@LD_JAOTC@
-
 # Xcode SDK path
 SDKROOT:=@SDKROOT@

@@ -574,6 +588,8 @@ CXXFILT:=@CXXFILT@

 LIPO:=@LIPO@
 INSTALL_NAME_TOOL:=@INSTALL_NAME_TOOL@
+METAL := @METAL@
+METALLIB := @METALLIB@

 # Options to linker to specify a mapfile.
 # (Note absence of := assignment, because we do not want to evaluate the macro body here)
@@ -648,6 +664,8 @@ BUILD_JAVA=@FIXPATH@ $(BUILD_JDK)/bin/java $(BUILD_JAVA_FLAGS)
 BUILD_JAVAC=@FIXPATH@ $(BUILD_JDK)/bin/javac
 BUILD_JAR=@FIXPATH@ $(BUILD_JDK)/bin/jar

+DOCS_REFERENCE_JAVADOC := @DOCS_REFERENCE_JAVADOC@
+
 # Interim langtools modules and arguments
 INTERIM_LANGTOOLS_BASE_MODULES := java.compiler jdk.compiler jdk.javadoc
 INTERIM_LANGTOOLS_MODULES := $(addsuffix .interim, $(INTERIM_LANGTOOLS_BASE_MODULES))
@@ -656,6 +674,8 @@ INTERIM_LANGTOOLS_ADD_EXPORTS := \
    --add-exports java.base/jdk.internal.jmod=jdk.compiler.interim \
    --add-exports java.base/jdk.internal.misc=jdk.compiler.interim \
    --add-exports java.base/sun.invoke.util=jdk.compiler.interim \
+    --add-exports java.base/jdk.internal.javac=java.compiler.interim \
+    --add-exports java.base/jdk.internal.javac=jdk.compiler.interim \
    #
 INTERIM_LANGTOOLS_MODULES_COMMA := $(strip $(subst $(SPACE),$(COMMA),$(strip \
    $(INTERIM_LANGTOOLS_MODULES))))
@@ -663,6 +683,7 @@ INTERIM_LANGTOOLS_ARGS := \
    --limit-modules java.base,jdk.zipfs,$(INTERIM_LANGTOOLS_MODULES_COMMA) \
    --add-modules $(INTERIM_LANGTOOLS_MODULES_COMMA) \
    --module-path $(BUILDTOOLS_OUTPUTDIR)/interim_langtools_modules \
+    --patch-module java.base=$(BUILDTOOLS_OUTPUTDIR)/gensrc/java.base.interim \
    $(INTERIM_LANGTOOLS_ADD_EXPORTS) \
    #
 JAVAC_MAIN_CLASS = -m jdk.compiler.interim/com.sun.tools.javac.Main
@@ -756,7 +777,6 @@ TAR_INCLUDE_PARAM:=@TAR_INCLUDE_PARAM@
 TAR_SUPPORTS_TRANSFORM:=@TAR_SUPPORTS_TRANSFORM@

 # Build setup
-ENABLE_AOT:=@ENABLE_AOT@
 USE_EXTERNAL_LIBJPEG:=@USE_EXTERNAL_LIBJPEG@
 USE_EXTERNAL_LIBGIF:=@USE_EXTERNAL_LIBGIF@
 USE_EXTERNAL_LIBZ:=@USE_EXTERNAL_LIBZ@
@@ -844,8 +864,8 @@ PNG_CFLAGS:=@PNG_CFLAGS@
 #

 INCLUDE_SA=@INCLUDE_SA@
-INCLUDE_GRAAL=@INCLUDE_GRAAL@
 INCLUDE_JVMCI=@INCLUDE_JVMCI@
+INCLUDE_COMPILER2=@INCLUDE_COMPILER2@

 OS_VERSION_MAJOR:=@OS_VERSION_MAJOR@
 OS_VERSION_MINOR:=@OS_VERSION_MINOR@
--- a/Show More
+++ b/Show More