port dcevm fixes for JBR-3867 and JBR-3887

JBR-3867 update keys of jvmti TAG map after redefinition

JBR-3887 fix M1 dcevm SIGBUS crash by using correct var arg processing

README.md

@@ -5,6 +5,14 @@
 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.
 
+## Releases
+Download the latest releases of JetBrains Runtime to use with JetBrains IDEs. The full list
+can be found on the [releases page](https://github.com/JetBrains/JetBrainsRuntime/releases).
+
+| IDE Version | Latest JBR | Date Released |
+|  ---        | ---        | ---           |
+| 2021.3      | [17-b106.1](https://github.com/JetBrains/JetBrainsRuntime/releases/tag/jbr17b106.1) | 28-Sep-2021 |
+
 ## Contents
 - [Welcome to JetBrains Runtime](#jetbrains-runtime)
   - [Products Built on JetBrains Runtime](#products-built-on-jetbrains-runtime)
@@ -16,6 +24,7 @@ It includes a number enhancements in font rendering, HiDPI support, ligatures, p
     - [Ubuntu Linux](#ubuntu-linux)
     - [Windows](#build-windows)
     - [macOS](#macos)
+  - [Developing](#developing)
   - [Contributing](#contributing)
   - [Resources](#resources)
 
@@ -130,6 +139,31 @@ $ 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/).

jb/project/idea-project-files/jetbrains.api.iml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/src/jetbrains.api">
+      <sourceFolder url="file://$MODULE_DIR$/src/jetbrains.api/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/jetbrains.api/templates" isTestSource="false" />
+    </content>
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="inheritedJdk" />
+  </component>
+</module>
+

jb/project/idea-project-files/modules.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/jdk.iml" filepath="$PROJECT_DIR$/.idea/jdk.iml" />
+      ###MODULE_IMLS###
+      <module fileurl="file://$PROJECT_DIR$/.idea/jetbrains.api.iml" filepath="$PROJECT_DIR$/.idea/jetbrains.api.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/test.iml" filepath="$PROJECT_DIR$/.idea/test.iml" />
+    </modules>
+  </component>
+</project>
+

jb/project/tools/common/scripts/build-jbr-api.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+# $1 - Boot JDK
+# $2 - JBR part of API version
+
+cd "`dirname "$0"`/../../../../.."
+PWD="`pwd`"
+CONF="$PWD/build/jbr-api.conf"
+./configure --with-debug-level=release --with-boot-jdk=$1 || exit $?
+make jbr-api CONF=release MAKEOVERRIDES= "JBR_API_CONF_FILE=$CONF" JBR_API_JBR_VERSION=$2 || exit $?
+. $CONF || exit $?
+echo "##teamcity[buildNumber '$VERSION']"
+cp "$JAR" ./jbr-api-${VERSION}.jar || exit $?
+cp "$SOURCES_JAR" ./jbr-api-${VERSION}-sources.jar || exit $?
+echo "##teamcity[publishArtifacts '$PWD/jbr-api-${VERSION}.jar']"
+echo "##teamcity[publishArtifacts '$PWD/jbr-api-${VERSION}-sources.jar']"

jb/project/tools/mkjbrapi.sh

@@ -1,56 +0,0 @@
-#!/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

jb/project/tools/patches/add_jcef_module.patch

@@ -1,11 +1,11 @@
 diff --git modules.list modules.list
-index dcf610a6a56..f8797505c23 100644
+index 054f21d1ee0..d9a121f0273 100644
 --- modules.list
 +++ modules.list
-@@ -51,4 +51,7 @@ jdk.zipfs,
+@@ -49,4 +49,7 @@ jdk.unsupported,
+ jdk.xml.dom,
+ jdk.zipfs,
  jdk.hotspot.agent,
- jetbrains.api,
- jetbrains.api.impl,
 -jdk.jcmd
 +jdk.jcmd,
 +jcef,

jb/project/tools/patches/dcevm/0003-Fix-class-cast-exception-on-redefinition-of-class-A-.patch

@@ -1,7 +1,7 @@
-From d937dae078891013a644c6a53eb17f8f5deb8ec8 Mon Sep 17 00:00:00 2001
+From 6e99aea309783dab138d3789b0039128bcc7344a 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 03/39] Fix class cast exception on redefinition of class A,
+Subject: [PATCH 03/42] Fix class cast exception on redefinition of class A,
  that is superclass of B that has anonymous class C
 
 ---

jb/project/tools/patches/dcevm/0004-Support-for-Lambda-class-redefinition.patch

@@ -1,7 +1,7 @@
-From 53d50b53f83aa5135ff5092d0d566424024b8b4b Mon Sep 17 00:00:00 2001
+From 146b85fb6af764594999cb9922fd820798f3e9cc 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 04/39] Support for Lambda class redefinition
+Subject: [PATCH 04/42] Support for Lambda class redefinition
 
 ---
  .../share/classfile/classLoaderData.cpp       |  9 +++
@@ -80,114 +80,114 @@ index 2bfd9cb802f..cea614a574f 100644
    // Hidden classes that are not strong must update ClassLoaderData holder
    // so that they can be unloaded when the mirror is no longer referenced.
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 5551d3ca123..bf31819479d 100644
+index 5308b079e67..c1b1b354541 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -492,6 +492,8 @@ 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;
+     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;
 @@ -754,12 +756,34 @@ 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();
- 
+     // 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();
+ 
 @@ -1440,6 +1464,30 @@ 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];
+   }
+ }
+ 
++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];
 @@ -1977,7 +2025,10 @@ 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.
+   // 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
+index a48e07e3a6a..3551b06ecde 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
+   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 6a8128e844f..8644937dbbb 100644
 --- a/src/hotspot/share/prims/resolvedMethodTable.cpp

jb/project/tools/patches/dcevm/0005-Fix-no-original-bytecode-found-error-if-method-with-.patch

@@ -1,7 +1,7 @@
-From 7bb6ea77608cd43cb7ca8c1ea8d492ae07789a0f Mon Sep 17 00:00:00 2001
+From 57d2451903b84dfc772cc0bf6957a52ee5e8c0f3 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 05/39] Fix "no original bytecode found" error if method with
+Subject: [PATCH 05/42] Fix "no original bytecode found" error if method with
  bkp is missing
 
 Sometimes IDE can deploy class with erroneous method, such method has
@@ -102,34 +102,34 @@ index 030ddd1f675..a8d6507ff6c 100644
    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 bf31819479d..07935bd0ada 100644
+index c1b1b354541..ad05b4f34cf 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -1360,14 +1360,16 @@ 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);
+ 
+     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
 

jb/project/tools/patches/dcevm/0006-Replace-deleted-method-with-Universe-throw_no_such_m.patch

@@ -1,7 +1,7 @@
-From c40cd307310822e6e60c61931c14f97a8501f975 Mon Sep 17 00:00:00 2001
+From d606e7de6dfe1204128a8ac034d8f57ad6130e0a 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 06/39] Replace deleted method with
+Subject: [PATCH 06/42] Replace deleted method with
  Universe::throw_no_such_method_error
 
 + Change log level in advanced redefinition
@@ -13,18 +13,18 @@ Subject: [PATCH 06/39] Replace deleted method with
  2 files changed, 16 insertions(+), 16 deletions(-)
 
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 07935bd0ada..3c86e8c68ac 100644
+index ad05b4f34cf..95be32f0070 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -881,7 +881,7 @@ 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());
+  // 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 8644937dbbb..b8d039adff6 100644
 --- a/src/hotspot/share/prims/resolvedMethodTable.cpp

jb/project/tools/patches/dcevm/0007-Support-for-G1-gc.patch

@@ -1,7 +1,7 @@
-From a3775e77a2b4c5ec15051d5cfbf150fc67719d90 Mon Sep 17 00:00:00 2001
+From 2365d0dc56b6b28ee3355e89ecf981a42fdfe440 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Fri, 12 Jun 2020 17:43:52 +0200
-Subject: [PATCH 07/39] Support for G1 gc
+Subject: [PATCH 07/42] Support for G1 gc
 
 ---
  src/hotspot/share/gc/g1/g1CollectedHeap.cpp   |  23 +++
@@ -1032,258 +1032,258 @@ index 8091ab2808d..9fcbb6c41b3 100644
    SystemDictionary::oops_do(oopClosure);
  }
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 3c86e8c68ac..1da6661dd3e 100644
+index 95be32f0070..2679d3a556a 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -36,7 +36,6 @@
- #include "memory/metaspaceShared.hpp"
- #include "memory/resourceArea.hpp"
- #include "memory/iterator.inline.hpp"
--#include "gc/serial/markSweep.hpp"
- #include "oops/fieldStreams.hpp"
- #include "oops/klassVtable.hpp"
- #include "oops/oop.inline.hpp"
+ #include "memory/metaspaceShared.hpp"
+ #include "memory/resourceArea.hpp"
+ #include "memory/iterator.inline.hpp"
+-#include "gc/serial/markSweep.hpp"
+ #include "oops/fieldStreams.hpp"
+ #include "oops/klassVtable.hpp"
+ #include "oops/oop.inline.hpp"
 @@ -54,6 +53,8 @@
- #include "prims/jvmtiThreadState.inline.hpp"
- #include "utilities/events.hpp"
- #include "oops/constantPool.inline.hpp"
-+#include "gc/g1/g1CollectedHeap.hpp"
-+#include "gc/shared/dcevmSharedGC.hpp"
- 
- Array<Method*>* VM_EnhancedRedefineClasses::_old_methods = NULL;
- Array<Method*>* VM_EnhancedRedefineClasses::_new_methods = NULL;
+ #include "prims/jvmtiThreadState.inline.hpp"
+ #include "utilities/events.hpp"
+ #include "oops/constantPool.inline.hpp"
++#include "gc/g1/g1CollectedHeap.hpp"
++#include "gc/shared/dcevmSharedGC.hpp"
+ 
+ Array<Method*>* VM_EnhancedRedefineClasses::_old_methods = NULL;
+ Array<Method*>* VM_EnhancedRedefineClasses::_new_methods = NULL;
 @@ -77,7 +78,7 @@ Klass*      VM_EnhancedRedefineClasses::_the_class_oop = NULL;
- //  - class_defs class definition - either new class or redefined class
- //               note that this is not the final array of classes to be redefined
- //               we need to scan for all affected classes (e.g. subclasses) and
--//               caculcate redefinition for them as well.
-+//               calculate redefinition for them as well.
- // @param class_load_kind always jvmti_class_load_kind_redefine
- VM_EnhancedRedefineClasses::VM_EnhancedRedefineClasses(jint class_count, const jvmtiClassDefinition *class_defs, JvmtiClassLoadKind class_load_kind) :
-         VM_GC_Operation(Universe::heap()->total_collections(), GCCause::_heap_inspection, Universe::heap()->total_full_collections(), true) {
+ //  - class_defs class definition - either new class or redefined class
+ //               note that this is not the final array of classes to be redefined
+ //               we need to scan for all affected classes (e.g. subclasses) and
+-//               caculcate redefinition for them as well.
++//               calculate redefinition for them as well.
+ // @param class_load_kind always jvmti_class_load_kind_redefine
+ VM_EnhancedRedefineClasses::VM_EnhancedRedefineClasses(jint class_count, const jvmtiClassDefinition *class_defs, JvmtiClassLoadKind class_load_kind) :
+         VM_GC_Operation(Universe::heap()->total_collections(), GCCause::_heap_inspection, Universe::heap()->total_full_collections(), true) {
 @@ -215,6 +216,20 @@ void VM_EnhancedRedefineClasses::mark_as_scavengable(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);
-+  }
-+}
-+
- // TODO comment
- struct StoreBarrier {
-   // TODO: j10 review change ::oop_store -> HeapAccess<>::oop_store
+   }
+ }
+ 
++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);
++  }
++}
++
+ // TODO comment
+ struct StoreBarrier {
+   // TODO: j10 review change ::oop_store -> HeapAccess<>::oop_store
 @@ -429,12 +444,7 @@ public:
-           src->set_klass(obj->klass()->new_version());
-           //  FIXME: instance updates...
-           //guarantee(false, "instance updates!");
--          MarkSweep::update_fields(obj, src, new_klass->update_information());
--
--          if (size_diff > 0) {
--            HeapWord* dead_space = ((HeapWord *)obj) + obj->size();
--            CollectedHeap::fill_with_object(dead_space, size_diff);
--          }
-+          DcevmSharedGC::update_fields(obj, src, new_klass->update_information());
-         }
-       } else {
-         obj->set_klass(obj->klass()->new_version());
+           src->set_klass(obj->klass()->new_version());
+           //  FIXME: instance updates...
+           //guarantee(false, "instance updates!");
+-          MarkSweep::update_fields(obj, src, new_klass->update_information());
+-
+-          if (size_diff > 0) {
+-            HeapWord* dead_space = ((HeapWord *)obj) + obj->size();
+-            CollectedHeap::fill_with_object(dead_space, size_diff);
+-          }
++          DcevmSharedGC::update_fields(obj, src, new_klass->update_information());
+         }
+       } else {
+         obj->set_klass(obj->klass()->new_version());
 @@ -456,6 +466,10 @@ public:
- void VM_EnhancedRedefineClasses::doit() {
-   Thread *thread = Thread::current();
- 
-+  if (log_is_enabled(Info, redefine, class, timer)) {
-+    _timer_vm_op_doit.start();
-+  }
-+
- #if INCLUDE_CDS
-   if (UseSharedSpaces) {
-     // Sharing is enabled so we remap the shared readonly space to
+ void VM_EnhancedRedefineClasses::doit() {
+   Thread *thread = Thread::current();
+ 
++  if (log_is_enabled(Info, redefine, class, timer)) {
++    _timer_vm_op_doit.start();
++  }
++
+ #if INCLUDE_CDS
+   if (UseSharedSpaces) {
+     // Sharing is enabled so we remap the shared readonly space to
 @@ -511,12 +525,37 @@ void VM_EnhancedRedefineClasses::doit() {
-     // mark such nmethod's as "scavengable".
-     // For now, mark all nmethod's as scavengable that are not scavengable already
-     if (ScavengeRootsInCode) {
--      CodeCache::nmethods_do(mark_as_scavengable);
-+      if (UseG1GC) {
-+        // 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);
-+      }
-     }
- 
-     Universe::heap()->ensure_parsability(false);
--    Universe::heap()->object_iterate(&objectClosure);
-+    if (UseG1GC) {
-+      if (log_is_enabled(Info, redefine, class, timer)) {
-+        _timer_heap_iterate.start();
-+      }
-+      G1CollectedHeap::heap()->object_par_iterate(&objectClosure);
-+      _timer_heap_iterate.stop();
-+    } else {
-+      if (log_is_enabled(Info, redefine, class, timer)) {
-+        _timer_heap_iterate.start();
-+      }
-+      Universe::heap()->object_iterate(&objectClosure);
-+      _timer_heap_iterate.stop();
-+    }
-+
-     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");
- 
+     // mark such nmethod's as "scavengable".
+     // For now, mark all nmethod's as scavengable that are not scavengable already
+     if (ScavengeRootsInCode) {
+-      CodeCache::nmethods_do(mark_as_scavengable);
++      if (UseG1GC) {
++        // 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);
++      }
+     }
+ 
+     Universe::heap()->ensure_parsability(false);
+-    Universe::heap()->object_iterate(&objectClosure);
++    if (UseG1GC) {
++      if (log_is_enabled(Info, redefine, class, timer)) {
++        _timer_heap_iterate.start();
++      }
++      G1CollectedHeap::heap()->object_par_iterate(&objectClosure);
++      _timer_heap_iterate.stop();
++    } else {
++      if (log_is_enabled(Info, redefine, class, timer)) {
++        _timer_heap_iterate.start();
++      }
++      Universe::heap()->object_iterate(&objectClosure);
++      _timer_heap_iterate.stop();
++    }
++
+     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");
+ 
 @@ -569,11 +608,19 @@ void VM_EnhancedRedefineClasses::doit() {
- 
-   if (objectClosure.needs_instance_update()) {
-     // Do a full garbage collection to update the instance sizes accordingly
-+
-+    if (log_is_enabled(Info, redefine, class, timer)) {
-+      _timer_heap_full_gc.start();
-+    }
-+
-     Universe::set_redefining_gc_run(true);
-     notify_gc_begin(true);
-+    // TODO: check _metadata_GC_clear_soft_refs with ScavengeRootsInCode
-     Universe::heap()->collect_as_vm_thread(GCCause::_heap_inspection);
-     notify_gc_end();
-     Universe::set_redefining_gc_run(false);
-+
-+    _timer_heap_full_gc.stop();
-   }
- 
-   // Unmark Klass*s as "redefining"
+ 
+   if (objectClosure.needs_instance_update()) {
+     // Do a full garbage collection to update the instance sizes accordingly
++
++    if (log_is_enabled(Info, redefine, class, timer)) {
++      _timer_heap_full_gc.start();
++    }
++
+     Universe::set_redefining_gc_run(true);
+     notify_gc_begin(true);
++    // TODO: check _metadata_GC_clear_soft_refs with ScavengeRootsInCode
+     Universe::heap()->collect_as_vm_thread(GCCause::_heap_inspection);
+     notify_gc_end();
+     Universe::set_redefining_gc_run(false);
++
++    _timer_heap_full_gc.stop();
+   }
+ 
+   // Unmark Klass*s as "redefining"
 @@ -621,6 +668,7 @@ void VM_EnhancedRedefineClasses::doit() {
-   }
- #endif
- 
-+  _timer_vm_op_doit.stop();
- }
- 
- // Cleanup - runs in JVM thread
+   }
+ #endif
+ 
++  _timer_vm_op_doit.stop();
+ }
+ 
+ // Cleanup - runs in JVM thread
 @@ -644,16 +692,14 @@ void VM_EnhancedRedefineClasses::doit_epilogue() {
-   if (log_is_enabled(Info, redefine, class, timer)) {
-     // Used to have separate timers for "doit" and "all", but the timer
-     // overhead skewed the measurements.
--    jlong doit_time = _timer_rsc_phase1.milliseconds() +
--                      _timer_rsc_phase2.milliseconds();
--    jlong all_time = _timer_vm_op_prologue.milliseconds() + doit_time;
-+    jlong all_time = _timer_vm_op_prologue.milliseconds() + _timer_vm_op_doit.milliseconds();
- 
-     log_info(redefine, class, timer)
-       ("vm_op: all=" JLONG_FORMAT "  prologue=" JLONG_FORMAT "  doit=" JLONG_FORMAT,
--       all_time, _timer_vm_op_prologue.milliseconds(), doit_time);
-+       all_time, _timer_vm_op_prologue.milliseconds(), _timer_vm_op_doit.milliseconds());
-     log_info(redefine, class, timer)
--      ("redefine_single_class: phase1=" JLONG_FORMAT "  phase2=" JLONG_FORMAT,
--       _timer_rsc_phase1.milliseconds(), _timer_rsc_phase2.milliseconds());
-+      ("doit: heap iterate=" JLONG_FORMAT "  fullgc=" JLONG_FORMAT,
-+       _timer_heap_iterate.milliseconds(), _timer_heap_full_gc.milliseconds());
-   }
- }
- 
+   if (log_is_enabled(Info, redefine, class, timer)) {
+     // Used to have separate timers for "doit" and "all", but the timer
+     // overhead skewed the measurements.
+-    jlong doit_time = _timer_rsc_phase1.milliseconds() +
+-                      _timer_rsc_phase2.milliseconds();
+-    jlong all_time = _timer_vm_op_prologue.milliseconds() + doit_time;
++    jlong all_time = _timer_vm_op_prologue.milliseconds() + _timer_vm_op_doit.milliseconds();
+ 
+     log_info(redefine, class, timer)
+       ("vm_op: all=" JLONG_FORMAT "  prologue=" JLONG_FORMAT "  doit=" JLONG_FORMAT,
+-       all_time, _timer_vm_op_prologue.milliseconds(), doit_time);
++       all_time, _timer_vm_op_prologue.milliseconds(), _timer_vm_op_doit.milliseconds());
+     log_info(redefine, class, timer)
+-      ("redefine_single_class: phase1=" JLONG_FORMAT "  phase2=" JLONG_FORMAT,
+-       _timer_rsc_phase1.milliseconds(), _timer_rsc_phase2.milliseconds());
++      ("doit: heap iterate=" JLONG_FORMAT "  fullgc=" JLONG_FORMAT,
++       _timer_heap_iterate.milliseconds(), _timer_heap_full_gc.milliseconds());
+   }
+ }
+ 
 @@ -1402,7 +1448,7 @@ void VM_EnhancedRedefineClasses::unpatch_bytecode(Method* method) {
- // arrayKlassOops. See Open Issues in jvmtiRedefineClasses.hpp.
- void VM_EnhancedRedefineClasses::ClearCpoolCacheAndUnpatch::do_klass(Klass* k) {
-   if (!k->is_instance_klass()) {
--	return;
-+    return;
-   }
- 
-   HandleMark hm(_thread);
+ // arrayKlassOops. See Open Issues in jvmtiRedefineClasses.hpp.
+ void VM_EnhancedRedefineClasses::ClearCpoolCacheAndUnpatch::do_klass(Klass* k) {
+   if (!k->is_instance_klass()) {
+-	return;
++    return;
+   }
+ 
+   HandleMark hm(_thread);
 @@ -1588,7 +1634,7 @@ class TransferNativeFunctionRegistration {
- 
-   // Recursively search the binary tree of possibly prefixed method names.
-   // Iteration could be used if all agents were well behaved. Full tree walk is
--  // more resilent to agents not cleaning up intermediate methods.
-+  // more resilient to agents not cleaning up intermediate methods.
-   // Branch at each depth in the binary tree is:
-   //    (1) without the prefix.
-   //    (2) with the prefix.
+ 
+   // Recursively search the binary tree of possibly prefixed method names.
+   // Iteration could be used if all agents were well behaved. Full tree walk is
+-  // more resilent to agents not cleaning up intermediate methods.
++  // more resilient to agents not cleaning up intermediate methods.
+   // Branch at each depth in the binary tree is:
+   //    (1) without the prefix.
+   //    (2) with the prefix.
 @@ -1693,7 +1739,7 @@ void VM_EnhancedRedefineClasses::transfer_old_native_function_registrations(Inst
-   transfer.transfer_registrations(_matching_old_methods, _matching_methods_length);
- }
- 
--// DCEVM - it always deoptimases everything! (because it is very difficult to find only correct dependencies)
-+// DCEVM - it always deoptimizes everything! (because it is very difficult to find only correct dependencies)
- // Deoptimize all compiled code that depends on this class.
- //
- // If the can_redefine_classes capability is obtained in the onload
+   transfer.transfer_registrations(_matching_old_methods, _matching_methods_length);
+ }
+ 
+-// DCEVM - it always deoptimases everything! (because it is very difficult to find only correct dependencies)
++// DCEVM - it always deoptimizes everything! (because it is very difficult to find only correct dependencies)
+ // Deoptimize all compiled code that depends on this class.
+ //
+ // If the can_redefine_classes capability is obtained in the onload
 @@ -1820,10 +1866,6 @@ void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_
- 
-   HandleMark hm(THREAD);   // make sure handles from this call are freed
- 
--  if (log_is_enabled(Info, redefine, class, timer)) {
--    _timer_rsc_phase1.start();
--  }
--
-   InstanceKlass* new_class = new_class_oop;
-   InstanceKlass* the_class = InstanceKlass::cast(new_class_oop->old_version());
-   assert(the_class != NULL, "must have old version");
+ 
+   HandleMark hm(THREAD);   // make sure handles from this call are freed
+ 
+-  if (log_is_enabled(Info, redefine, class, timer)) {
+-    _timer_rsc_phase1.start();
+-  }
+-
+   InstanceKlass* new_class = new_class_oop;
+   InstanceKlass* the_class = InstanceKlass::cast(new_class_oop->old_version());
+   assert(the_class != NULL, "must have old version");
 @@ -1878,7 +1920,6 @@ void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_
-                              new_class->external_name(),
-                              java_lang_Class::classRedefinedCount(new_class->java_mirror()));
-   }
--  _timer_rsc_phase2.stop();
- } // end redefine_single_class()
- 
- 
+                              new_class->external_name(),
+                              java_lang_Class::classRedefinedCount(new_class->java_mirror()));
+   }
+-  _timer_rsc_phase2.stop();
+ } // end redefine_single_class()
+ 
+ 
 @@ -2061,8 +2102,8 @@ static bool match_second(void* value, KlassPair elem) {
- // For each class to be redefined parse the bytecode and figure out the superclass and all interfaces.
- // First newly introduced classes (_class_defs) are scanned and then affected classed (_affected_klasses).
- // Affected flag is cleared (clear_redefinition_flag(Klass::MarkedAsAffected))
--// For each dependency create a KlassPair instance. Finnaly, affected classes (_affected_klasses) are sorted according to pairs.
--// TODO - the class file is potentionally parsed multiple times - introduce a cache?
-+// For each dependency create a KlassPair instance. Finally, affected classes (_affected_klasses) are sorted according to pairs.
-+// TODO - the class file is potentially parsed multiple times - introduce a cache?
- jvmtiError VM_EnhancedRedefineClasses::do_topological_class_sorting(TRAPS) {
-   ResourceMark mark(THREAD);
- 
+ // For each class to be redefined parse the bytecode and figure out the superclass and all interfaces.
+ // First newly introduced classes (_class_defs) are scanned and then affected classed (_affected_klasses).
+ // Affected flag is cleared (clear_redefinition_flag(Klass::MarkedAsAffected))
+-// For each dependency create a KlassPair instance. Finnaly, affected classes (_affected_klasses) are sorted according to pairs.
+-// TODO - the class file is potentionally parsed multiple times - introduce a cache?
++// For each dependency create a KlassPair instance. Finally, affected classes (_affected_klasses) are sorted according to pairs.
++// TODO - the class file is potentially parsed multiple times - introduce a cache?
+ jvmtiError VM_EnhancedRedefineClasses::do_topological_class_sorting(TRAPS) {
+   ResourceMark mark(THREAD);
+ 
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
-index d8a11b51fe9..4c0412d343d 100644
+index 3551b06ecde..d00109a0b92 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 @@ -86,9 +86,10 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
-   // Performance measurement support. These timers do not cover all
-   // the work done for JVM/TI RedefineClasses() but they do cover
-   // the heavy lifting.
--  elapsedTimer  _timer_rsc_phase1;
--  elapsedTimer  _timer_rsc_phase2;
-+  elapsedTimer  _timer_vm_op_doit;
-   elapsedTimer  _timer_vm_op_prologue;
-+  elapsedTimer  _timer_heap_iterate;
-+  elapsedTimer  _timer_heap_full_gc;
- 
-   // These routines are roughly in call order unless otherwise noted.
- 
+   // Performance measurement support. These timers do not cover all
+   // the work done for JVM/TI RedefineClasses() but they do cover
+   // the heavy lifting.
+-  elapsedTimer  _timer_rsc_phase1;
+-  elapsedTimer  _timer_rsc_phase2;
++  elapsedTimer  _timer_vm_op_doit;
+   elapsedTimer  _timer_vm_op_prologue;
++  elapsedTimer  _timer_heap_iterate;
++  elapsedTimer  _timer_heap_full_gc;
+ 
+   // These routines are roughly in call order unless otherwise noted.
+ 
 @@ -115,6 +116,8 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
- 
-   void rollback();
-   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);
- 
+ 
+   void rollback();
+   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);
+ 
 diff --git a/src/hotspot/share/runtime/arguments.cpp b/src/hotspot/share/runtime/arguments.cpp
-index 1373408f18d..b7bb88e2a46 100644
+index 11e7997b4a6..2d33448ec8d 100644
 --- a/src/hotspot/share/runtime/arguments.cpp
 +++ b/src/hotspot/share/runtime/arguments.cpp
-@@ -1981,9 +1981,9 @@ bool Arguments::check_gc_consistency() {
+@@ -1985,9 +1985,9 @@ bool Arguments::check_gc_consistency() {
    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.

jb/project/tools/patches/dcevm/0008-AllowEnhancedClassRedefinition-is-false-disabled-by-.patch

@@ -1,7 +1,7 @@
-From e062743b148a099a8593a3110d5f1d9156f4ca23 Mon Sep 17 00:00:00 2001
+From e818e4a83fafc07142b7b7279c633823d5d8ab23 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 08/39] AllowEnhancedClassRedefinition is false (disabled) by
+Subject: [PATCH 08/42] AllowEnhancedClassRedefinition is false (disabled) by
  default
 
 ---
@@ -9,7 +9,7 @@ Subject: [PATCH 08/39] AllowEnhancedClassRedefinition is false (disabled) by
  1 file changed, 1 insertion(+), 1 deletion(-)
 
 diff --git a/src/hotspot/share/runtime/globals.hpp b/src/hotspot/share/runtime/globals.hpp
-index 2fcb02fcf49..7051b634a9b 100644
+index 845a39b0225..fb6d1667156 100644
 --- a/src/hotspot/share/runtime/globals.hpp
 +++ b/src/hotspot/share/runtime/globals.hpp
 @@ -2088,7 +2088,7 @@ const intx ObjectAlignmentInBytes = 8;

jb/project/tools/patches/dcevm/0009-Set-HOTSPOT_VM_DISTRO-Dynamic-Code-Evolution.patch

@@ -1,7 +1,7 @@
-From 703cb7aa230b6a159c7f1f86b749a8e0119ef881 Mon Sep 17 00:00:00 2001
+From 737c3616d674224661dd8751861f0365d9591d80 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 09/39] Set HOTSPOT_VM_DISTRO=Dynamic Code Evolution
+Subject: [PATCH 09/42] Set HOTSPOT_VM_DISTRO=Dynamic Code Evolution
 
 ---
  make/autoconf/version-numbers | 55 +++++++++++++++++++++++++++++++++++

jb/project/tools/patches/dcevm/0010-Clear-dcevm-code-separation.patch

@@ -1,7 +1,7 @@
-From 3b4788c779cb9ffe2751e996bba3b445b474eba7 Mon Sep 17 00:00:00 2001
+From b14f6ba2d743aacf15dedfe8ad677f176683d51c 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 10/39] Clear dcevm code separation
+Subject: [PATCH 10/42] Clear dcevm code separation
 
 ---
  src/hotspot/share/classfile/systemDictionary.cpp   |  3 +--

jb/project/tools/patches/dcevm/0011-Fix-LoadedClassesClosure-fixes-problems-with-remote-.patch

@@ -1,7 +1,7 @@
-From bb8f91da24b2649507f2e200f1ff2bae2d2658bf Mon Sep 17 00:00:00 2001
+From 3957393df0bd440fe90f4a8eea007b3354a45b98 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 11/39] Fix LoadedClassesClosure - fixes problems with remote
+Subject: [PATCH 11/42] Fix LoadedClassesClosure - fixes problems with remote
  debugging
 
 ---

jb/project/tools/patches/dcevm/0012-dcevm15-fix-java15-compilation-issues.patch

@@ -1,7 +1,7 @@
-From 2dd09ce40a545a4256f990346e5cebf23dbf0b56 Mon Sep 17 00:00:00 2001
+From f583e16509936d6873c4a2dac936d9089cc402a1 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Fri, 12 Feb 2021 10:10:02 +0100
-Subject: [PATCH 12/39] dcevm15 - fix java15 compilation issues
+Subject: [PATCH 12/42] dcevm15 - fix java15 compilation issues
 
 ---
  .../share/classfile/classFileParser.hpp       |   8 +-
@@ -411,496 +411,496 @@ index a7fe090ba01..2966343c835 100644
  
      // The hidden class loader data has been artificially been kept alive to
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 1da6661dd3e..efaf11e1666 100644
+index 2679d3a556a..a27c2ff87ae 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"
+ 
+ #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"
+ #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;
+ #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.
+ 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) {
+   _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) {
+ 
+ // 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) {
+       _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) {
 @@ -498,16 +508,13 @@ 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.
-     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;
+ 
+   // 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.
+     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);
- 
+     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());
-     }
+       // 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());
+     }
 @@ -640,12 +647,7 @@ void VM_EnhancedRedefineClasses::doit() {
-   //MethodDataCleaner clean_weak_method_links;
-   //ClassLoaderDataGraph::classes_do(&clean_weak_method_links);
- 
--  // Disable any dependent concurrent compilations
--  SystemDictionary::notice_modification();
--
--  // Set flag indicating that some invariants are no longer true.
--  // See jvmtiExport.hpp for detailed explanation.
--  JvmtiExport::set_has_redefined_a_class();
-+  JvmtiExport::increment_redefinition_count();
- 
- #ifdef PRODUCT
-   if (log_is_enabled(Trace, redefine, class, obsolete, metadata)) {
+   //MethodDataCleaner clean_weak_method_links;
+   //ClassLoaderDataGraph::classes_do(&clean_weak_method_links);
+ 
+-  // Disable any dependent concurrent compilations
+-  SystemDictionary::notice_modification();
+-
+-  // Set flag indicating that some invariants are no longer true.
+-  // See jvmtiExport.hpp for detailed explanation.
+-  JvmtiExport::set_has_redefined_a_class();
++  JvmtiExport::increment_redefinition_count();
+ 
+ #ifdef PRODUCT
+   if (log_is_enabled(Trace, redefine, class, obsolete, metadata)) {
 @@ -718,7 +720,7 @@ 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;
+   }
+ 
+   // 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 +806,30 @@ 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 {
+ 
+     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 +976,7 @@ 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)) {
+   // 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 +986,7 @@ 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;
+   }
+ 
+   // 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 +1399,8 @@ 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()) {
+ // 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 +1464,11 @@ 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
+   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 +1502,18 @@ 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;
-+    }
-   }
- }
- 
+ 
+   // 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 +1533,8 @@ 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();
+   }
+ }
+ 
+-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 +1545,10 @@ 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 {
+ 
+     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 {
 @@ -1739,6 +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.
- //
+   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.
+ //
 @@ -1755,33 +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);
-   }
- }
+ // 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);
+   }
+ }
 @@ -1874,11 +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();
+   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();
 @@ -1887,7 +1881,7 @@ 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;
- 
+ 
+   // 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 +2113,12 @@ 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);
+ 
+     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 +2128,7 @@ 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)) {
+       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 +2151,7 @@ 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)) {
+         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..bd5e7d153be 100644
+index d00109a0b92..61f62e7f831 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"
- 
- //
+ #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().
+   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, ...)
+   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();
+   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();
 @@ -139,7 +142,11 @@ 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();
- 
-   static void check_class(InstanceKlass* k_oop, TRAPS);
- 
+   // 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();
+ 
+   static void check_class(InstanceKlass* k_oop, TRAPS);
+ 
 @@ -181,6 +188,7 @@ 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
+ 
+   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 6d1692949cb..8970d7991b7 100644
 --- a/src/hotspot/share/prims/jvmtiEnv.cpp
@@ -1151,10 +1151,10 @@ index b8d039adff6..3c29eda4da0 100644
  class VerifyResolvedMethod : StackObj {
   public:
 diff --git a/src/hotspot/share/runtime/arguments.cpp b/src/hotspot/share/runtime/arguments.cpp
-index b7bb88e2a46..567803b70b7 100644
+index 2d33448ec8d..9661f2b62b9 100644
 --- a/src/hotspot/share/runtime/arguments.cpp
 +++ b/src/hotspot/share/runtime/arguments.cpp
-@@ -1975,13 +1975,15 @@ bool Arguments::check_gc_consistency() {
+@@ -1979,13 +1979,15 @@ bool Arguments::check_gc_consistency() {
    // of collectors.
    uint i = 0;
    if (UseSerialGC)                       i++;

jb/project/tools/patches/dcevm/0013-dcevm15-add-ClassLoaderDataGraph_lock-on.patch

@@ -1,7 +1,7 @@
-From 9815ee603b27484953651bdc6d5705994a4d38aa Mon Sep 17 00:00:00 2001
+From 4c98b29fed42b51e399f2ae0dc06f0c7a4397e2c 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 13/39] dcevm15 - add ClassLoaderDataGraph_lock on
+Subject: [PATCH 13/42] dcevm15 - add ClassLoaderDataGraph_lock on
  ClassLoaderDataGraph::classes_do
 
 ClassLoaderDataGraph::classes_do and need safepoint or lock,
@@ -13,31 +13,31 @@ ClassLoaderDataGraph::rollback_redefinition need safepoint too
  1 file changed, 6 insertions(+), 1 deletion(-)
 
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index efaf11e1666..9f42d14ce98 100644
+index a27c2ff87ae..001d2c782d8 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -1380,7 +1380,9 @@ 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));
+ // 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));
 @@ -2063,7 +2065,10 @@ 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());
+   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
 

jb/project/tools/patches/dcevm/0014-dcevm15-fix-Universe-root_oops_do.patch

@@ -1,7 +1,7 @@
-From d3e5f8acd389021128bb8a899bb538294de353f6 Mon Sep 17 00:00:00 2001
+From b312e64db8532c57658d1f39269d73969ecf98d4 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 14/39] dcevm15 - fix Universe::root_oops_do
+Subject: [PATCH 14/42] dcevm15 - fix Universe::root_oops_do
 
 Removed ClassLoaderDataGraph::cld_do was cause of crashes due multiple
 oop patching. ClassLoaderDataGraph::cld_do replaced in dcevm15

jb/project/tools/patches/dcevm/0015-dcevm15-check-if-has_nestmate_access_to-has-newest-h.patch

@@ -1,7 +1,7 @@
-From 574cddeb00c3d93bddbaf1845a7d9d3ffdced324 Mon Sep 17 00:00:00 2001
+From b99bae1157fea7a62a2c9d2f10aaf722de1a5299 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 15/39] dcevm15 - check if has_nestmate_access_to has newest
+Subject: [PATCH 15/42] dcevm15 - check if has_nestmate_access_to has newest
  host class
 
 ---

jb/project/tools/patches/dcevm/0016-dcevm15-mark_as_scavengable-only-alive-methods.patch

@@ -1,54 +1,54 @@
-From 983b4aaed2c56a74287b9400ddae4b7d7f3fd715 Mon Sep 17 00:00:00 2001
+From 936d83f295468e7c0e51b759def1d8664cca2a6e 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 16/39] dcevm15 - mark_as_scavengable only alive methods
+Subject: [PATCH 16/42] dcevm15 - 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 9f42d14ce98..db5fb1c472b 100644
+index 001d2c782d8..d742679d199 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);
-   }
- }
+ 
+ // 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) {
+     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
 

jb/project/tools/patches/dcevm/0017-dcevm15-fix-hidded-classes.patch

@@ -1,91 +1,91 @@
-From ed546016ead6064d8b95a9c1e4cdc6bc192f8d67 Mon Sep 17 00:00:00 2001
+From 50e3023f20fbea76fcc644a037bebc3ee5afc212 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 17/39] dcevm15 - fix hidded classes
+Subject: [PATCH 17/42] 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
+index d742679d199..1433e429e30 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;
+   }
+ 
+   // 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,
+ 
+     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,
+                                          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();
+     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
 

jb/project/tools/patches/dcevm/0018-dcevm15-DON-T-clear-F2-in-CP-cache-after-indy-unevol.patch

@@ -1,7 +1,7 @@
-From 9983c44fe6903daba758ed0c43b8c86e738e0741 Mon Sep 17 00:00:00 2001
+From 21a17a7caf43236590d2e7319e176cb19c42f9aa 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 18/39] dcevm15 - DON'T clear F2 in CP cache after indy
+Subject: [PATCH 18/42] dcevm15 - DON'T clear F2 in CP cache after indy
  unevolving
 
 It's not clear why it was cleared in dcevm7-11

jb/project/tools/patches/dcevm/0019-Cleanup-and-review-comments.patch

@@ -1,7 +1,7 @@
-From 3b09df69c007285ea6c258388532a8e5f9fe3d45 Mon Sep 17 00:00:00 2001
+From e286bbfb6ef8235be6aa9b41e30e9ed36cfd177d 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 19/39] Cleanup and review comments
+Subject: [PATCH 19/42] Cleanup and review comments
 
 ---
  src/hotspot/share/classfile/classLoaderDataGraph.hpp     | 2 +-
@@ -37,30 +37,30 @@ index 26a2b67b8e9..8e78696bef5 100644
    } else if (os::is_server_class_machine()) {
  #if INCLUDE_G1GC
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 590f7fdfafe..2a7dd35bdd1 100644
+index 1433e429e30..af34d751bdb 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -842,6 +842,7 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
-       k->class_loader_data()->exchange_holders(the_class->class_loader_data());
- 
-       if (the_class->is_hidden()) {
-+      // TODO: (DCEVM) review if is correct
-       // 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
+       k->class_loader_data()->exchange_holders(the_class->class_loader_data());
+ 
+       if (the_class->is_hidden()) {
++      // TODO: (DCEVM) review if is correct
+       // 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
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
-index bd5e7d153be..5de375fb888 100644
+index 61f62e7f831..43f1aff8e91 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;
- 
+   // 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
 

jb/project/tools/patches/dcevm/0020-Disable-AllowEnhancedClassRedefinition-in-flight-rec.patch

@@ -1,7 +1,7 @@
-From 5c41ecc9f48d22b81b3ac610e5655f1a74d25614 Mon Sep 17 00:00:00 2001
+From a755a90e2845ef3a30f3f03185ecee1a71182606 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Fri, 12 Feb 2021 10:11:10 +0100
-Subject: [PATCH 20/39] Disable AllowEnhancedClassRedefinition in flight
+Subject: [PATCH 20/42] Disable AllowEnhancedClassRedefinition in flight
  recorder
 
 ---
@@ -9,10 +9,10 @@ Subject: [PATCH 20/39] Disable AllowEnhancedClassRedefinition in flight
  1 file changed, 7 insertions(+)
 
 diff --git a/src/hotspot/share/runtime/arguments.cpp b/src/hotspot/share/runtime/arguments.cpp
-index 567803b70b7..cbcd8f91c66 100644
+index 9661f2b62b9..252ebbc4e57 100644
 --- a/src/hotspot/share/runtime/arguments.cpp
 +++ b/src/hotspot/share/runtime/arguments.cpp
-@@ -3994,6 +3994,13 @@ jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
+@@ -4027,6 +4027,13 @@ jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
    // Set object alignment values.
    set_object_alignment();
  

jb/project/tools/patches/dcevm/0021-dcevm17-fix-compilation-issues.patch

@@ -1,7 +1,7 @@
-From e560b33cdec3ef0e4ce91714663d3befa87ff4e5 Mon Sep 17 00:00:00 2001
+From 8770c3da756a6193d69bb8c23aa992584edcb723 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Fri, 12 Feb 2021 09:44:28 +0100
-Subject: [PATCH 21/39] dcevm17 - fix compilation issues
+Subject: [PATCH 21/42] dcevm17 - fix compilation issues
 
 ---
  .../share/classfile/classLoaderData.cpp       |   2 +-
@@ -533,120 +533,120 @@ index b4d09e92830..c2de2bec7d4 100644
  
    // Verify local interfaces
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 2a7dd35bdd1..071dbc6d6ad 100644
+index af34d751bdb..0b1db1581d1 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -26,8 +26,10 @@
- #include "aot/aotLoader.hpp"
- #include "classfile/classFileParser.hpp"
- #include "classfile/classFileStream.hpp"
-+#include "classfile/classLoadInfo.hpp"
- #include "classfile/metadataOnStackMark.hpp"
- #include "classfile/systemDictionary.hpp"
-+#include "classfile/symbolTable.hpp"
- #include "classfile/verifier.hpp"
- #include "classfile/dictionary.hpp"
- #include "classfile/classLoaderDataGraph.hpp"
+ #include "aot/aotLoader.hpp"
+ #include "classfile/classFileParser.hpp"
+ #include "classfile/classFileStream.hpp"
++#include "classfile/classLoadInfo.hpp"
+ #include "classfile/metadataOnStackMark.hpp"
+ #include "classfile/systemDictionary.hpp"
++#include "classfile/symbolTable.hpp"
+ #include "classfile/verifier.hpp"
+ #include "classfile/dictionary.hpp"
+ #include "classfile/classLoaderDataGraph.hpp"
 @@ -198,8 +200,8 @@ class FieldCopier : public FieldClosure {
-     if (found && result.is_static()) {
-       log_trace(redefine, class, obsolete, metadata)("Copying static field value for field %s old_offset=%d new_offset=%d",
-                                                fd->name()->as_C_string(), result.offset(), fd->offset());
--      memcpy(cur_oop->obj_field_addr_raw<HeapWord>(fd->offset()),
--             old_oop->obj_field_addr_raw<HeapWord>(result.offset()),
-+      memcpy(cur_oop->obj_field_addr<HeapWord>(fd->offset()),
-+             old_oop->obj_field_addr<HeapWord>(result.offset()),
-              type2aelembytes(fd->field_type()));
- 
-       // Static fields may have references to java.lang.Class
+     if (found && result.is_static()) {
+       log_trace(redefine, class, obsolete, metadata)("Copying static field value for field %s old_offset=%d new_offset=%d",
+                                                fd->name()->as_C_string(), result.offset(), fd->offset());
+-      memcpy(cur_oop->obj_field_addr_raw<HeapWord>(fd->offset()),
+-             old_oop->obj_field_addr_raw<HeapWord>(result.offset()),
++      memcpy(cur_oop->obj_field_addr<HeapWord>(fd->offset()),
++             old_oop->obj_field_addr<HeapWord>(result.offset()),
+              type2aelembytes(fd->field_type()));
+ 
+       // Static fields may have references to java.lang.Class
 @@ -242,6 +244,17 @@ void VM_EnhancedRedefineClasses::register_nmethod_g1(nmethod* nm) {
-   }
- }
- 
-+void VM_EnhancedRedefineClasses::root_oops_do(OopClosure *oopClosure) {
-+  Universe::vm_global()->oops_do(oopClosure);
-+
-+  Threads::oops_do(oopClosure, NULL);
-+  AOT_ONLY(AOTLoader::oops_do(oopClosure);)
-+  OopStorageSet::strong_oops_do(oopClosure);
-+
-+  CodeBlobToOopClosure blobClosure(oopClosure, CodeBlobToOopClosure::FixRelocations);
-+  CodeCache::blobs_do(&blobClosure);
-+}
-+
- // TODO comment
- struct StoreBarrier {
-   // TODO: j10 review change ::oop_store -> HeapAccess<>::oop_store
+   }
+ }
+ 
++void VM_EnhancedRedefineClasses::root_oops_do(OopClosure *oopClosure) {
++  Universe::vm_global()->oops_do(oopClosure);
++
++  Threads::oops_do(oopClosure, NULL);
++  AOT_ONLY(AOTLoader::oops_do(oopClosure);)
++  OopStorageSet::strong_oops_do(oopClosure);
++
++  CodeBlobToOopClosure blobClosure(oopClosure, CodeBlobToOopClosure::FixRelocations);
++  CodeCache::blobs_do(&blobClosure);
++}
++
+ // TODO comment
+ struct StoreBarrier {
+   // TODO: j10 review change ::oop_store -> HeapAccess<>::oop_store
 @@ -558,7 +571,7 @@ void VM_EnhancedRedefineClasses::doit() {
-       _timer_heap_iterate.stop();
-     }
- 
--    Universe::root_oops_do(&oopClosureNoBarrier);
-+    root_oops_do(&oopClosureNoBarrier);
- 
-     if (UseG1GC) {
-       // this should work also for other GCs
+       _timer_heap_iterate.stop();
+     }
+ 
+-    Universe::root_oops_do(&oopClosureNoBarrier);
++    root_oops_do(&oopClosureNoBarrier);
+ 
+     if (UseG1GC) {
+       // this should work also for other GCs
 @@ -737,8 +750,8 @@ bool VM_EnhancedRedefineClasses::is_modifiable_class(oop klass_mirror) {
- //  - link new classes
- jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
- 
--  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count, true);
--  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count, true);
-+  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count);
-+  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count);
- 
-   ResourceMark rm(THREAD);
- 
+ //  - link new classes
+ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
+ 
+-  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count, true);
+-  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count, true);
++  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count);
++  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count);
+ 
+   ResourceMark rm(THREAD);
+ 
 @@ -832,12 +845,12 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
-                             !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,
--                                         the_class_loader,
--                                         &st,
--                                         cl_info,
--                                         the_class,
--                                         THREAD);
-+      k = SystemDictionary::resolve_from_stream(&st,
-+                                                the_class_sym,
-+                                                the_class_loader,
-+                                                cl_info,
-+                                                the_class,
-+                                                THREAD);
- 
-       k->class_loader_data()->exchange_holders(the_class->class_loader_data());
- 
+                             !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,
+-                                         the_class_loader,
+-                                         &st,
+-                                         cl_info,
+-                                         the_class,
+-                                         THREAD);
++      k = SystemDictionary::resolve_from_stream(&st,
++                                                the_class_sym,
++                                                the_class_loader,
++                                                cl_info,
++                                                the_class,
++                                                THREAD);
+ 
+       k->class_loader_data()->exchange_holders(the_class->class_loader_data());
+ 
 @@ -853,12 +866,12 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
-       }
- 
-     } else {
--      k = SystemDictionary::resolve_from_stream(the_class_sym,
--                                                  the_class_loader,
--                                                  protection_domain,
--                                                  &st,
--                                                  the_class,
--                                                  THREAD);
-+      k = SystemDictionary::resolve_from_stream(&st,
-+                                                the_class_sym,
-+                                                the_class_loader,
-+                                                protection_domain,
-+                                                the_class,
-+                                                THREAD);
-     }
-     // Clear class_being_redefined just to be sure.
-     state->clear_class_being_redefined();
+       }
+ 
+     } else {
+-      k = SystemDictionary::resolve_from_stream(the_class_sym,
+-                                                  the_class_loader,
+-                                                  protection_domain,
+-                                                  &st,
+-                                                  the_class,
+-                                                  THREAD);
++      k = SystemDictionary::resolve_from_stream(&st,
++                                                the_class_sym,
++                                                the_class_loader,
++                                                protection_domain,
++                                                the_class,
++                                                THREAD);
+     }
+     // Clear class_being_redefined just to be sure.
+     state->clear_class_being_redefined();
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
-index 5de375fb888..9be70039e32 100644
+index 43f1aff8e91..ae0a15281f3 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 @@ -124,6 +124,8 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
-   static void register_nmethod_g1(nmethod* nm);
-   static void unpatch_bytecode(Method* method, TRAPS);
- 
-+  void root_oops_do(OopClosure *oopClosure);
-+
-   // 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();
+   static void register_nmethod_g1(nmethod* nm);
+   static void unpatch_bytecode(Method* method, TRAPS);
+ 
++  void root_oops_do(OopClosure *oopClosure);
++
+   // 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();
 diff --git a/src/hotspot/share/prims/resolvedMethodTable.cpp b/src/hotspot/share/prims/resolvedMethodTable.cpp
 index 3c29eda4da0..a1eadc2958a 100644
 --- a/src/hotspot/share/prims/resolvedMethodTable.cpp
@@ -678,10 +678,10 @@ index 3c29eda4da0..a1eadc2958a 100644
        if (_local_table->insert(thread, lookup, wh)) {
          log_insert(method);
 diff --git a/src/hotspot/share/runtime/arguments.hpp b/src/hotspot/share/runtime/arguments.hpp
-index 1b7f8fe9f47..6a8ceb7fa8a 100644
+index 3adc03a6583..b8eb4d0ab24 100644
 --- a/src/hotspot/share/runtime/arguments.hpp
 +++ b/src/hotspot/share/runtime/arguments.hpp
-@@ -482,6 +482,8 @@ class Arguments : AllStatic {
+@@ -487,6 +487,8 @@ class Arguments : AllStatic {
    // Adjusts the arguments after the OS have adjusted the arguments
    static jint adjust_after_os();
  

jb/project/tools/patches/dcevm/0022-Fix-crash-on-GrowableArray-allocation-in-C_HEAP.patch

@@ -1,27 +1,27 @@
-From 6e18ad67981ab5a1bbdac46e1e0c7cc80beb4a5b Mon Sep 17 00:00:00 2001
+From d170fa0a21d5c62348fe77eeaa81b16c8c51531a Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Fri, 12 Feb 2021 11:38:48 +0100
-Subject: [PATCH 22/39] Fix crash on GrowableArray allocation in C_HEAP
+Subject: [PATCH 22/42] Fix crash on GrowableArray allocation in C_HEAP
 
 ---
  src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)
 
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 071dbc6d6ad..a5264077bfe 100644
+index 0b1db1581d1..b88c071be13 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -750,8 +750,8 @@ bool VM_EnhancedRedefineClasses::is_modifiable_class(oop klass_mirror) {
- //  - link new classes
- jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
- 
--  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count);
--  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count);
-+  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count, mtInternal);
-+  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count, mtInternal);
- 
-   ResourceMark rm(THREAD);
- 
+ //  - link new classes
+ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
+ 
+-  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count);
+-  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count);
++  _affected_klasses = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<Klass*>(_class_count, mtInternal);
++  _new_classes = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<InstanceKlass*>(_class_count, mtInternal);
+ 
+   ResourceMark rm(THREAD);
+ 
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0023-Rename-confusing-method-name-old_if_redefined-to-old.patch

@@ -1,7 +1,7 @@
-From 96680710816d9cd6e9cd8d5ce6dcbe054a7e53bd Mon Sep 17 00:00:00 2001
+From 8f59a799ec9996f3d92843f1a9f8504390c20009 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Fri, 12 Feb 2021 11:39:05 +0100
-Subject: [PATCH 23/39] Rename confusing method name old_if_redefined to
+Subject: [PATCH 23/42] Rename confusing method name old_if_redefined to
  old_if_redefining
 
 ---

jb/project/tools/patches/dcevm/0024-Check-InstanceKlass-has_nestmate_access_to-with-acti.patch

@@ -1,7 +1,7 @@
-From 5d10d789150dfa6f8366dceb7fce3251d725ab8a Mon Sep 17 00:00:00 2001
+From cc05b370b2fdf4c367bb9b6e4a21b9f97ae53dcf Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Fri, 12 Feb 2021 12:33:47 +0100
-Subject: [PATCH 24/39] Check InstanceKlass::has_nestmate_access_to with active
+Subject: [PATCH 24/42] Check InstanceKlass::has_nestmate_access_to with active
  classes
 
 Dcevm can leave old host in nested class if nested class is not

jb/project/tools/patches/dcevm/0025-JBR-3111-Update-class-in-all-dictionaries-where-it-w.patch

@@ -1,7 +1,7 @@
-From dac9d7a7d87de680a50be7c2857646323c4c8ffa Mon Sep 17 00:00:00 2001
+From fdc87a0203f5aa1a21b3bf2e7a5aa114739f66cf Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Sat, 13 Feb 2021 20:47:52 +0100
-Subject: [PATCH 25/39] JBR-3111 Update class in all dictionaries where it was
+Subject: [PATCH 25/42] JBR-3111 Update class in all dictionaries where it was
  already defined
 
 This patch keeps compatibility with std redefinition, that does not

jb/project/tools/patches/dcevm/0026-Add-ClassLoaderDataGraph_lock-to-define-new-class-in.patch

@@ -1,7 +1,7 @@
-From f42115a3d488c93a2d163aebd030530f060dcef8 Mon Sep 17 00:00:00 2001
+From a33424d92f6001c9f9cb627b620f490fdfbc1196 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Sat, 20 Feb 2021 15:47:47 +0100
-Subject: [PATCH 26/39] Add ClassLoaderDataGraph_lock to define new class in
+Subject: [PATCH 26/42] Add ClassLoaderDataGraph_lock to define new class in
  enhanced redefiniton
 
 ClassLoaderDataGraph locking for introduced in redefinition in

jb/project/tools/patches/dcevm/0027-JBR-3140-support-for-modularized-HotswapAgent.patch

@@ -1,7 +1,7 @@
-From 30308e893e43425da166175f5f18f84abf2c6110 Mon Sep 17 00:00:00 2001
+From e85a74a6bd33e5d81569ec209311e698de402990 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Thu, 18 Jun 2020 18:40:11 +0200
-Subject: [PATCH 27/39] JBR-3140 - support for modularized HotswapAgent
+Subject: [PATCH 27/42] JBR-3140 - support for modularized HotswapAgent
 
 Add -XX:HotswapAgent=[disabled,fatjar.core]
 ---
@@ -13,10 +13,10 @@ Add -XX:HotswapAgent=[disabled,fatjar.core]
  5 files changed, 102 insertions(+), 2 deletions(-)
 
 diff --git a/src/hotspot/share/runtime/arguments.cpp b/src/hotspot/share/runtime/arguments.cpp
-index cbcd8f91c66..4f9cfde9323 100644
+index 252ebbc4e57..9c6fab8ae4b 100644
 --- a/src/hotspot/share/runtime/arguments.cpp
 +++ b/src/hotspot/share/runtime/arguments.cpp
-@@ -4001,6 +4001,8 @@ jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
+@@ -4034,6 +4034,8 @@ jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
      }
    }
  
@@ -25,7 +25,7 @@ index cbcd8f91c66..4f9cfde9323 100644
  #if !INCLUDE_CDS
    if (DumpSharedSpaces || RequireSharedSpaces) {
      jio_fprintf(defaultStream::error_stream(),
-@@ -4357,3 +4359,78 @@ bool Arguments::copy_expand_pid(const char* src, size_t srclen,
+@@ -4390,3 +4392,78 @@ bool Arguments::copy_expand_pid(const char* src, size_t srclen,
    *b = '\0';
    return (p == src_end); // return false if not all of the source was copied
  }
@@ -105,10 +105,10 @@ index cbcd8f91c66..4f9cfde9323 100644
 +
 +}
 diff --git a/src/hotspot/share/runtime/arguments.hpp b/src/hotspot/share/runtime/arguments.hpp
-index 6a8ceb7fa8a..7669a283375 100644
+index b8eb4d0ab24..a14e11b48ef 100644
 --- a/src/hotspot/share/runtime/arguments.hpp
 +++ b/src/hotspot/share/runtime/arguments.hpp
-@@ -491,6 +491,10 @@ class Arguments : AllStatic {
+@@ -496,6 +496,10 @@ class Arguments : AllStatic {
  
    static size_t conservative_max_heap_alignment() { return _conservative_max_heap_alignment; }
  
@@ -154,7 +154,7 @@ index 8bc3a9a1548..c5f58fd16ee 100644
  RUNTIME_CONSTRAINTS(DECLARE_CONSTRAINT)
  
 diff --git a/src/hotspot/share/runtime/globals.hpp b/src/hotspot/share/runtime/globals.hpp
-index 7051b634a9b..d23e43407e1 100644
+index fb6d1667156..20838a878ce 100644
 --- a/src/hotspot/share/runtime/globals.hpp
 +++ b/src/hotspot/share/runtime/globals.hpp
 @@ -2090,7 +2090,16 @@ const intx ObjectAlignmentInBytes = 8;

jb/project/tools/patches/dcevm/0028-Support-for-redefinition-of-Well-Known-classses-java.patch

@@ -1,7 +1,7 @@
-From 51f0036ff15d39330b787512af9e38d15c748e4b Mon Sep 17 00:00:00 2001
+From b2e59ba5f246798f4901fa16d8fd3aeceac8309e Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Sun, 7 Mar 2021 20:22:54 +0100
-Subject: [PATCH 28/39] Support for redefinition of Well Known classses
+Subject: [PATCH 28/42] Support for redefinition of Well Known classses
  (java.*,jdk.*, sun.*)
 
 ---
@@ -222,126 +222,126 @@ index 4b2211c415e..4d4c444220e 100644
  
    // Reference pending list manipulation.  Access is protected by
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index a5264077bfe..e00f0e19e20 100644
+index b88c071be13..fb9da134e97 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -55,6 +55,7 @@
- #include "prims/resolvedMethodTable.hpp"
- #include "prims/methodHandles.hpp"
- #include "runtime/deoptimization.hpp"
-+#include "runtime/javaCalls.hpp"
- #include "runtime/jniHandles.inline.hpp"
- #include "runtime/relocator.hpp"
- #include "runtime/fieldDescriptor.hpp"
+ #include "prims/resolvedMethodTable.hpp"
+ #include "prims/methodHandles.hpp"
+ #include "runtime/deoptimization.hpp"
++#include "runtime/javaCalls.hpp"
+ #include "runtime/jniHandles.inline.hpp"
+ #include "runtime/relocator.hpp"
+ #include "runtime/fieldDescriptor.hpp"
 @@ -66,6 +67,7 @@
- #include "gc/g1/g1CollectedHeap.hpp"
- #include "gc/shared/dcevmSharedGC.hpp"
- #include "gc/shared/scavengableNMethods.hpp"
-+#include "gc/shared/oopStorageSet.inline.hpp"
- #include "ci/ciObjectFactory.hpp"
- 
- Array<Method*>* VM_EnhancedRedefineClasses::_old_methods = NULL;
+ #include "gc/g1/g1CollectedHeap.hpp"
+ #include "gc/shared/dcevmSharedGC.hpp"
+ #include "gc/shared/scavengableNMethods.hpp"
++#include "gc/shared/oopStorageSet.inline.hpp"
+ #include "ci/ciObjectFactory.hpp"
+ 
+ Array<Method*>* VM_EnhancedRedefineClasses::_old_methods = NULL;
 @@ -521,6 +523,16 @@ void VM_EnhancedRedefineClasses::doit() {
-     redefine_single_class(_new_classes->at(i), thread);
-   }
- 
-+  // Update possible redefinition of vm classes (like ClassLoader)
-+  for (int i = 0; i < _new_classes->length(); i++) {
-+    InstanceKlass* cur = _new_classes->at(i);
-+    if (cur->old_version() != NULL && vmClasses::update_vm_klass(InstanceKlass::cast(cur->old_version()), cur))
-+    {
-+      log_trace(redefine, class, obsolete, metadata)("Well known class updated %s", cur->external_name());
-+      ciObjectFactory::set_reinitialize_vm_klasses();
-+    }
-+  }
-+
-   // 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(thread);
+     redefine_single_class(_new_classes->at(i), thread);
+   }
+ 
++  // Update possible redefinition of vm classes (like ClassLoader)
++  for (int i = 0; i < _new_classes->length(); i++) {
++    InstanceKlass* cur = _new_classes->at(i);
++    if (cur->old_version() != NULL && vmClasses::update_vm_klass(InstanceKlass::cast(cur->old_version()), cur))
++    {
++      log_trace(redefine, class, obsolete, metadata)("Well known class updated %s", cur->external_name());
++      ciObjectFactory::set_reinitialize_vm_klasses();
++    }
++  }
++
+   // 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(thread);
 @@ -688,12 +700,56 @@ void VM_EnhancedRedefineClasses::doit() {
-   _timer_vm_op_doit.stop();
- }
- 
-+void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
-+  if (!_new_classes->is_empty()) {
-+    ResourceMark rm(Thread::current());
-+
-+    for (int i = 0; i < _new_classes->length(); i++) {
-+      InstanceKlass* cur = _new_classes->at(i);
-+
-+      if (cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/")) {
-+
-+        if (cur == vmClasses::ClassLoader_klass()) {
-+          // ClassLoader.addClass method is cached in Universe, we must redefine
-+          Universe::reinitialize_loader_addClass_method(Thread::current());
-+          log_trace(redefine, class, obsolete, metadata)("Reinitialize ClassLoade addClass method cache.");
-+        }
-+
-+        // naive assumptions that only JDK classes has native static "registerNative" and "initIDs" methods
-+        int end;
-+        Symbol* signature = vmSymbols::registerNatives_method_name();
-+        int midx = cur->find_method_by_name(signature, &end);
-+        if (midx == -1) {
-+          signature = vmSymbols::initIDs_method_name();
-+          midx = cur->find_method_by_name(signature, &end);
-+        }
-+        Method* m = NULL;
-+        if (midx != -1) {
-+          m = cur->methods()->at(midx);
-+        }
-+        if (m != NULL && m->is_static() && m->is_native()) {
-+          // call static registerNative if present
-+          JavaValue result(T_VOID);
-+          JavaCalls::call_static(&result,
-+                                  cur,
-+                                  signature,
-+                                  vmSymbols::void_method_signature(),
-+                                  Thread::current());
-+          log_trace(redefine, class, obsolete, metadata)("Reregister natives of JDK class %s", cur->external_name());
-+        }
-+      }
-+    }
-+  }
-+}
-+
- // Cleanup - runs in JVM thread
- //  - free used memory
- //  - end GC
- void VM_EnhancedRedefineClasses::doit_epilogue() {
-   VM_GC_Operation::doit_epilogue();
- 
-+  reinitializeJDKClasses();
-+
-   if (_new_classes != NULL) {
-     delete _new_classes;
-   }
+   _timer_vm_op_doit.stop();
+ }
+ 
++void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
++  if (!_new_classes->is_empty()) {
++    ResourceMark rm(Thread::current());
++
++    for (int i = 0; i < _new_classes->length(); i++) {
++      InstanceKlass* cur = _new_classes->at(i);
++
++      if (cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/")) {
++
++        if (cur == vmClasses::ClassLoader_klass()) {
++          // ClassLoader.addClass method is cached in Universe, we must redefine
++          Universe::reinitialize_loader_addClass_method(Thread::current());
++          log_trace(redefine, class, obsolete, metadata)("Reinitialize ClassLoade addClass method cache.");
++        }
++
++        // naive assumptions that only JDK classes has native static "registerNative" and "initIDs" methods
++        int end;
++        Symbol* signature = vmSymbols::registerNatives_method_name();
++        int midx = cur->find_method_by_name(signature, &end);
++        if (midx == -1) {
++          signature = vmSymbols::initIDs_method_name();
++          midx = cur->find_method_by_name(signature, &end);
++        }
++        Method* m = NULL;
++        if (midx != -1) {
++          m = cur->methods()->at(midx);
++        }
++        if (m != NULL && m->is_static() && m->is_native()) {
++          // call static registerNative if present
++          JavaValue result(T_VOID);
++          JavaCalls::call_static(&result,
++                                  cur,
++                                  signature,
++                                  vmSymbols::void_method_signature(),
++                                  Thread::current());
++          log_trace(redefine, class, obsolete, metadata)("Reregister natives of JDK class %s", cur->external_name());
++        }
++      }
++    }
++  }
++}
++
+ // Cleanup - runs in JVM thread
+ //  - free used memory
+ //  - end GC
+ void VM_EnhancedRedefineClasses::doit_epilogue() {
+   VM_GC_Operation::doit_epilogue();
+ 
++  reinitializeJDKClasses();
++
+   if (_new_classes != NULL) {
+     delete _new_classes;
+   }
 @@ -1623,7 +1679,12 @@ void VM_EnhancedRedefineClasses::check_methods_and_mark_as_obsolete() {
- 
-       // obsolete methods need a unique idnum so they become new entries in
-       // the jmethodID cache in InstanceKlass
--      assert(old_method->method_idnum() == new_method->method_idnum(), "must match");
-+      if (old_method->method_idnum() != new_method->method_idnum()) {
-+        log_error(redefine, class, normalize)
-+          ("Method not matched: %d != %d  old: %s = new: %s",  old_method->method_idnum(), new_method->method_idnum(),
-+              old_method->name_and_sig_as_C_string(), new_method->name_and_sig_as_C_string());
-+        // assert(old_method->method_idnum() == new_method->method_idnum(), "must match");
-+      }
- //      u2 num = InstanceKlass::cast(_the_class_oop)->next_method_idnum();
- //      if (num != ConstMethod::UNSET_IDNUM) {
- //        old_method->set_method_idnum(num);
+ 
+       // obsolete methods need a unique idnum so they become new entries in
+       // the jmethodID cache in InstanceKlass
+-      assert(old_method->method_idnum() == new_method->method_idnum(), "must match");
++      if (old_method->method_idnum() != new_method->method_idnum()) {
++        log_error(redefine, class, normalize)
++          ("Method not matched: %d != %d  old: %s = new: %s",  old_method->method_idnum(), new_method->method_idnum(),
++              old_method->name_and_sig_as_C_string(), new_method->name_and_sig_as_C_string());
++        // assert(old_method->method_idnum() == new_method->method_idnum(), "must match");
++      }
+ //      u2 num = InstanceKlass::cast(_the_class_oop)->next_method_idnum();
+ //      if (num != ConstMethod::UNSET_IDNUM) {
+ //        old_method->set_method_idnum(num);
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
-index 9be70039e32..673688dff84 100644
+index ae0a15281f3..d0d2f78aa62 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 @@ -150,6 +150,8 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
- 
-   u8 next_id();
- 
-+  void reinitializeJDKClasses();
-+
-   static void check_class(InstanceKlass* k_oop, TRAPS);
- 
-   static void dump_methods();
+ 
+   u8 next_id();
+ 
++  void reinitializeJDKClasses();
++
+   static void check_class(InstanceKlass* k_oop, TRAPS);
+ 
+   static void dump_methods();
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0029-Fix-fastdebug-compilation-issues-cast_to_oop.patch

@@ -1,7 +1,7 @@
-From 6cde71e353f823f2df2d0875cd03b656fe060d5c Mon Sep 17 00:00:00 2001
+From 76c2c517d54f0fdbae2cb10cceb6c1aab7ee3a7b Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Sat, 15 May 2021 10:31:28 +0200
-Subject: [PATCH 29/39] Fix fastdebug compilation issues - cast_to_oop
+Subject: [PATCH 29/42] Fix fastdebug compilation issues - cast_to_oop
 
 ---
  .../share/gc/g1/g1FullGCCompactTask.cpp       | 12 +++++-----
@@ -243,18 +243,18 @@ index cafa2503ef4..076ce6b0cce 100644
          debug_only(prev_obj = cur_obj);
          cur_obj += size;
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index e00f0e19e20..62477b5ce10 100644
+index fb9da134e97..890382e2029 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -439,7 +439,7 @@ public:
-     int size = o->size();
-     if (_tmp_obj_size < size) {
-       _tmp_obj_size = size;
--      _tmp_obj = (oop)resource_allocate_bytes(size * HeapWordSize);
-+      _tmp_obj = cast_to_oop(resource_allocate_bytes(size * HeapWordSize));
-     }
-     Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(o), cast_from_oop<HeapWord*>(_tmp_obj), size);
-   }
+     int size = o->size();
+     if (_tmp_obj_size < size) {
+       _tmp_obj_size = size;
+-      _tmp_obj = (oop)resource_allocate_bytes(size * HeapWordSize);
++      _tmp_obj = cast_to_oop(resource_allocate_bytes(size * HeapWordSize));
+     }
+     Copy::aligned_disjoint_words(cast_from_oop<HeapWord*>(o), cast_from_oop<HeapWord*>(_tmp_obj), size);
+   }
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0030-JBR-3458-Skip-dynamic-proxy-classes-based-on-com.sun.patch

@@ -1,7 +1,7 @@
-From 585e2f11d293081db5dc919fa8c13fb5bc7cbc53 Mon Sep 17 00:00:00 2001
+From e3dcad4df8369cfa4a5eb90058ce265c0233b272 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <lada.dvorak7@gmail.com>
 Date: Fri, 19 Mar 2021 19:13:38 +0100
-Subject: [PATCH 30/39] JBR-3458: Skip dynamic proxy classes based on
+Subject: [PATCH 30/42] JBR-3458: Skip dynamic proxy classes based on
  com.sun.proxy
 
 ---
@@ -9,19 +9,19 @@ Subject: [PATCH 30/39] JBR-3458: Skip dynamic proxy classes based on
  1 file changed, 2 insertions(+), 1 deletion(-)
 
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 62477b5ce10..7bdbc861c1f 100644
+index 890382e2029..90dfc1ae545 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -707,7 +707,8 @@ void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
-     for (int i = 0; i < _new_classes->length(); i++) {
-       InstanceKlass* cur = _new_classes->at(i);
- 
--      if (cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/")) {
-+      if ((cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/"))
-+          && cur->name()->index_of_at(0, "$$") == -1) { // skip dynamic proxies
- 
-         if (cur == vmClasses::ClassLoader_klass()) {
-           // ClassLoader.addClass method is cached in Universe, we must redefine
+     for (int i = 0; i < _new_classes->length(); i++) {
+       InstanceKlass* cur = _new_classes->at(i);
+ 
+-      if (cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/")) {
++      if ((cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/"))
++          && cur->name()->index_of_at(0, "$$") == -1) { // skip dynamic proxies
+ 
+         if (cur == vmClasses::ClassLoader_klass()) {
+           // ClassLoader.addClass method is cached in Universe, we must redefine
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0031-JBR-3459-Fix-race-condition-in-ClassLoaderDataGraph-.patch

@@ -1,7 +1,7 @@
-From d4d56b7ad6cd8f73f7485cdc608655c014c55f3c Mon Sep 17 00:00:00 2001
+From b57c414d7885df5142a4a6bbf78001e96938f8ac Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <lada.dvorak7@gmail.com>
 Date: Sat, 20 Mar 2021 20:51:08 +0100
-Subject: [PATCH 31/39] JBR-3459: Fix race condition in
+Subject: [PATCH 31/42] JBR-3459: Fix race condition in
  ClassLoaderDataGraph::classes_do
 
 InstanceKlass in ClassLoaderData can be uninitialized when
@@ -51,31 +51,31 @@ index ebdb0bc2c8c..da712eaf55f 100644
    static void methods_do(void f(Method*));
    static void modules_do(void f(ModuleEntry*));
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 7bdbc861c1f..4e8e7141e61 100644
+index 90dfc1ae545..10407755457 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -2164,9 +2164,19 @@ jvmtiError VM_EnhancedRedefineClasses::find_sorted_affected_classes(TRAPS) {
- 
-   {
-     MutexLocker mcld(ClassLoaderDataGraph_lock);
--    ClassLoaderDataGraph::classes_do(&closure);
-+
-+    // 0. we can't use ClassLoaderDataGraph::classes_do since classes can be uninitialized in cld,
-+    // fully initialized class is in system dictionary
-+    // ClassLoaderDataGraph::classes_do(&closure);
-+
-+    // 1. Scan over dictionaries
-+    ClassLoaderDataGraph::dictionary_classes_do(&closure);
-+
-+    // 2. Anonymous or hidden class is not in dictionary, we have to iterate anonymous cld directly, but there is race cond...
-+    // TODO: review ... anonymous class is added to cld before InstanceKlass initialization,
-+    //                  find out how to check if the InstanceKlass is initialized
-+    ClassLoaderDataGraph::anonymous_or_hidden_classes_do(&closure);
-   }
--  //ClassLoaderDataGraph::dictionary_classes_do(&closure);
- 
-   log_trace(redefine, class, load)("%d classes affected", _affected_klasses->length());
- 
+ 
+   {
+     MutexLocker mcld(ClassLoaderDataGraph_lock);
+-    ClassLoaderDataGraph::classes_do(&closure);
++
++    // 0. we can't use ClassLoaderDataGraph::classes_do since classes can be uninitialized in cld,
++    // fully initialized class is in system dictionary
++    // ClassLoaderDataGraph::classes_do(&closure);
++
++    // 1. Scan over dictionaries
++    ClassLoaderDataGraph::dictionary_classes_do(&closure);
++
++    // 2. Anonymous or hidden class is not in dictionary, we have to iterate anonymous cld directly, but there is race cond...
++    // TODO: review ... anonymous class is added to cld before InstanceKlass initialization,
++    //                  find out how to check if the InstanceKlass is initialized
++    ClassLoaderDataGraph::anonymous_or_hidden_classes_do(&closure);
+   }
+-  //ClassLoaderDataGraph::dictionary_classes_do(&closure);
+ 
+   log_trace(redefine, class, load)("%d classes affected", _affected_klasses->length());
+ 
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0032-Fix-compilation-problems.patch

@@ -1,7 +1,7 @@
-From 5356c4dbbcc2564e401fc92b7680b870ee7070ec Mon Sep 17 00:00:00 2001
+From 66d53205a84c8e4db40fb2fc91f563cde458afcc Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Sat, 15 May 2021 13:01:25 +0200
-Subject: [PATCH 32/39] Fix compilation problems
+Subject: [PATCH 32/42] Fix compilation problems
 
 ---
  src/hotspot/share/oops/instanceKlass.cpp                 | 2 +-
@@ -22,18 +22,18 @@ index 3cc96f98f41..c54b6b1bf46 100644
        }
      }
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index 4e8e7141e61..f6bef8262d3 100644
+index 10407755457..e87d4452d31 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -708,7 +708,7 @@ void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
-       InstanceKlass* cur = _new_classes->at(i);
- 
-       if ((cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/"))
--          && cur->name()->index_of_at(0, "$$") == -1) { // skip dynamic proxies
-+          && cur->name()->index_of_at(0, "$$", (int) strlen("$$")) == -1) { // skip dynamic proxies
- 
-         if (cur == vmClasses::ClassLoader_klass()) {
-           // ClassLoader.addClass method is cached in Universe, we must redefine
+       InstanceKlass* cur = _new_classes->at(i);
+ 
+       if ((cur->name()->starts_with("java/") || cur->name()->starts_with("jdk/") || cur->name()->starts_with("sun/"))
+-          && cur->name()->index_of_at(0, "$$") == -1) { // skip dynamic proxies
++          && cur->name()->index_of_at(0, "$$", (int) strlen("$$")) == -1) { // skip dynamic proxies
+ 
+         if (cur == vmClasses::ClassLoader_klass()) {
+           // ClassLoader.addClass method is cached in Universe, we must redefine
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0033-Fix-dcevm-issues-related-to-refactorization-of-Threa.patch

@@ -1,7 +1,7 @@
-From 3eb64e8ed65ae214091b55e497d24dff0eb1e353 Mon Sep 17 00:00:00 2001
+From fd5b6cd29a5dfed532b0c6ac80c94271f388c5bc Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Sun, 20 Jun 2021 19:11:16 +0200
-Subject: [PATCH 33/39] Fix dcevm issues related to refactorization of Thread
+Subject: [PATCH 33/42] Fix dcevm issues related to refactorization of Thread
  to JavaThread
 
 ---
@@ -23,328 +23,328 @@ index 5c058dc43ac..9de28f740ac 100644
  
    {
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index f6bef8262d3..b662976afcb 100644
+index e87d4452d31..0aeeea4e7a4 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -23,7 +23,6 @@
-  */
- 
- #include "precompiled.hpp"
--#include "aot/aotLoader.hpp"
- #include "classfile/classFileParser.hpp"
- #include "classfile/classFileStream.hpp"
- #include "classfile/classLoadInfo.hpp"
+  */
+ 
+ #include "precompiled.hpp"
+-#include "aot/aotLoader.hpp"
+ #include "classfile/classFileParser.hpp"
+ #include "classfile/classFileStream.hpp"
+ #include "classfile/classLoadInfo.hpp"
 @@ -38,7 +37,7 @@
- #include "interpreter/rewriter.hpp"
- #include "logging/logStream.hpp"
- #include "memory/metadataFactory.hpp"
--#include "memory/metaspaceShared.hpp"
-+#include "cds/metaspaceShared.hpp"
- #include "memory/resourceArea.hpp"
- #include "memory/iterator.inline.hpp"
- #include "oops/fieldStreams.hpp"
+ #include "interpreter/rewriter.hpp"
+ #include "logging/logStream.hpp"
+ #include "memory/metadataFactory.hpp"
+-#include "memory/metaspaceShared.hpp"
++#include "cds/metaspaceShared.hpp"
+ #include "memory/resourceArea.hpp"
+ #include "memory/iterator.inline.hpp"
+ #include "oops/fieldStreams.hpp"
 @@ -156,7 +155,7 @@ bool VM_EnhancedRedefineClasses::doit_prologue() {
- 
-   // We first load new class versions in the prologue, because somewhere down the
-   // call chain it is required that the current thread is a Java thread.
--  _res = load_new_class_versions(Thread::current());
-+  _res = load_new_class_versions(JavaThread::current());
- 
-   // prepare GC, lock heap
-   if (_res == JVMTI_ERROR_NONE && !VM_GC_Operation::doit_prologue()) {
+ 
+   // We first load new class versions in the prologue, because somewhere down the
+   // call chain it is required that the current thread is a Java thread.
+-  _res = load_new_class_versions(Thread::current());
++  _res = load_new_class_versions(JavaThread::current());
+ 
+   // prepare GC, lock heap
+   if (_res == JVMTI_ERROR_NONE && !VM_GC_Operation::doit_prologue()) {
 @@ -250,7 +249,6 @@ void VM_EnhancedRedefineClasses::root_oops_do(OopClosure *oopClosure) {
-   Universe::vm_global()->oops_do(oopClosure);
- 
-   Threads::oops_do(oopClosure, NULL);
--  AOT_ONLY(AOTLoader::oops_do(oopClosure);)
-   OopStorageSet::strong_oops_do(oopClosure);
- 
-   CodeBlobToOopClosure blobClosure(oopClosure, CodeBlobToOopClosure::FixRelocations);
+   Universe::vm_global()->oops_do(oopClosure);
+ 
+   Threads::oops_do(oopClosure, NULL);
+-  AOT_ONLY(AOTLoader::oops_do(oopClosure);)
+   OopStorageSet::strong_oops_do(oopClosure);
+ 
+   CodeBlobToOopClosure blobClosure(oopClosure, CodeBlobToOopClosure::FixRelocations);
 @@ -520,7 +518,7 @@ void VM_EnhancedRedefineClasses::doit() {
-                            // before the stack walk again.
- 
-   for (int i = 0; i < _new_classes->length(); i++) {
--    redefine_single_class(_new_classes->at(i), thread);
-+    redefine_single_class(thread, _new_classes->at(i));
-   }
- 
-   // Update possible redefinition of vm classes (like ClassLoader)
+                            // before the stack walk again.
+ 
+   for (int i = 0; i < _new_classes->length(); i++) {
+-    redefine_single_class(_new_classes->at(i), thread);
++    redefine_single_class(thread, _new_classes->at(i));
+   }
+ 
+   // Update possible redefinition of vm classes (like ClassLoader)
 @@ -535,7 +533,7 @@ 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(thread);
-+    flush_dependent_code();
-   // }
- 
-   // Adjust constantpool caches for all classes that reference methods of the evolved class.
+ 
+   // 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(thread);
++    flush_dependent_code();
+   // }
+ 
+   // Adjust constantpool caches for all classes that reference methods of the evolved class.
 @@ -692,7 +690,7 @@ void VM_EnhancedRedefineClasses::doit() {
-     assert(new_version->super() == NULL || new_version->super()->new_version() == NULL, "Super class must be newest version");
-   }
-   log_trace(redefine, class, obsolete, metadata)("calling check_class");
--  ClassLoaderData::the_null_class_loader_data()->dictionary()->classes_do(check_class, thread);
-+  ClassLoaderData::the_null_class_loader_data()->dictionary()->classes_do(check_class);
- #ifdef PRODUCT
-   }
- #endif
+     assert(new_version->super() == NULL || new_version->super()->new_version() == NULL, "Super class must be newest version");
+   }
+   log_trace(redefine, class, obsolete, metadata)("calling check_class");
+-  ClassLoaderData::the_null_class_loader_data()->dictionary()->classes_do(check_class, thread);
++  ClassLoaderData::the_null_class_loader_data()->dictionary()->classes_do(check_class);
+ #ifdef PRODUCT
+   }
+ #endif
 @@ -702,7 +700,7 @@ void VM_EnhancedRedefineClasses::doit() {
- 
- void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
-   if (!_new_classes->is_empty()) {
--    ResourceMark rm(Thread::current());
-+    ResourceMark rm(JavaThread::current());
- 
-     for (int i = 0; i < _new_classes->length(); i++) {
-       InstanceKlass* cur = _new_classes->at(i);
+ 
+ void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
+   if (!_new_classes->is_empty()) {
+-    ResourceMark rm(Thread::current());
++    ResourceMark rm(JavaThread::current());
+ 
+     for (int i = 0; i < _new_classes->length(); i++) {
+       InstanceKlass* cur = _new_classes->at(i);
 @@ -712,7 +710,7 @@ void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
- 
-         if (cur == vmClasses::ClassLoader_klass()) {
-           // ClassLoader.addClass method is cached in Universe, we must redefine
--          Universe::reinitialize_loader_addClass_method(Thread::current());
-+          Universe::reinitialize_loader_addClass_method(JavaThread::current());
-           log_trace(redefine, class, obsolete, metadata)("Reinitialize ClassLoade addClass method cache.");
-         }
- 
+ 
+         if (cur == vmClasses::ClassLoader_klass()) {
+           // ClassLoader.addClass method is cached in Universe, we must redefine
+-          Universe::reinitialize_loader_addClass_method(Thread::current());
++          Universe::reinitialize_loader_addClass_method(JavaThread::current());
+           log_trace(redefine, class, obsolete, metadata)("Reinitialize ClassLoade addClass method cache.");
+         }
+ 
 @@ -735,7 +733,7 @@ void VM_EnhancedRedefineClasses::reinitializeJDKClasses() {
-                                   cur,
-                                   signature,
-                                   vmSymbols::void_method_signature(),
--                                  Thread::current());
-+                                  JavaThread::current());
-           log_trace(redefine, class, obsolete, metadata)("Reregister natives of JDK class %s", cur->external_name());
-         }
-       }
+                                   cur,
+                                   signature,
+                                   vmSymbols::void_method_signature(),
+-                                  Thread::current());
++                                  JavaThread::current());
+           log_trace(redefine, class, obsolete, metadata)("Reregister natives of JDK class %s", cur->external_name());
+         }
+       }
 @@ -793,7 +791,7 @@ bool VM_EnhancedRedefineClasses::is_modifiable_class(oop klass_mirror) {
- 
-   // Cannot redefine or retransform an anonymous class.
-   // TODO: check if is correct in j15
--  if (InstanceKlass::cast(k)->is_unsafe_anonymous() || InstanceKlass::cast(k)->is_hidden()) {
-+  if (InstanceKlass::cast(k)->is_hidden()) {
-     return false;
-   }
-   return true;
+ 
+   // Cannot redefine or retransform an anonymous class.
+   // TODO: check if is correct in j15
+-  if (InstanceKlass::cast(k)->is_unsafe_anonymous() || InstanceKlass::cast(k)->is_hidden()) {
++  if (InstanceKlass::cast(k)->is_hidden()) {
+     return false;
+   }
+   return true;
 @@ -879,23 +877,15 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
- 
-     InstanceKlass* k;
- 
--    if (the_class->is_unsafe_anonymous() || the_class->is_hidden()) {
-+    if (the_class->is_hidden()) {
-       InstanceKlass* dynamic_host_class = NULL;
--      InstanceKlass* unsafe_anonymous_host = NULL;
- 
-       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,
--                            unsafe_anonymous_host,
--                            NULL,     // cp_patches
-                             dynamic_host_class,     // dynamic_nest_host
-                             Handle(), // classData
-                             the_class->is_hidden(),    // is_hidden
+ 
+     InstanceKlass* k;
+ 
+-    if (the_class->is_unsafe_anonymous() || the_class->is_hidden()) {
++    if (the_class->is_hidden()) {
+       InstanceKlass* dynamic_host_class = NULL;
+-      InstanceKlass* unsafe_anonymous_host = NULL;
+ 
+       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,
+-                            unsafe_anonymous_host,
+-                            NULL,     // cp_patches
+                             dynamic_host_class,     // dynamic_nest_host
+                             Handle(), // classData
+                             the_class->is_hidden(),    // is_hidden
 @@ -1143,7 +1133,7 @@ int VM_EnhancedRedefineClasses::calculate_redefinition_flags(InstanceKlass* new_
-   Array<Method*>* k_new_methods(new_class->methods());
-   int n_old_methods = k_old_methods->length();
-   int n_new_methods = k_new_methods->length();
--  Thread* thread = Thread::current();
-+  JavaThread* thread = JavaThread::current();
- 
-   int ni = 0;
-   int oi = 0;
+   Array<Method*>* k_new_methods(new_class->methods());
+   int n_old_methods = k_old_methods->length();
+   int n_new_methods = k_new_methods->length();
+-  Thread* thread = Thread::current();
++  JavaThread* thread = JavaThread::current();
+ 
+   int ni = 0;
+   int oi = 0;
 @@ -1491,8 +1481,8 @@ 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, TRAPS) {
--  RawBytecodeStream bcs(methodHandle(THREAD, method));
-+void VM_EnhancedRedefineClasses::unpatch_bytecode(Method* method) {
-+  RawBytecodeStream bcs(methodHandle(Thread::current(), method));
-   Bytecodes::Code code;
-   Bytecodes::Code java_code;
-   while (!bcs.is_last_bytecode()) {
+ // 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, TRAPS) {
+-  RawBytecodeStream bcs(methodHandle(THREAD, method));
++void VM_EnhancedRedefineClasses::unpatch_bytecode(Method* method) {
++  RawBytecodeStream bcs(methodHandle(Thread::current(), method));
+   Bytecodes::Code code;
+   Bytecodes::Code java_code;
+   while (!bcs.is_last_bytecode()) {
 @@ -1535,10 +1525,10 @@ void VM_EnhancedRedefineClasses::unpatch_bytecode(Method* method, TRAPS) {
-       assert(code2 == Bytecodes::_fast_igetfield ||
-              code2 == Bytecodes::_fast_agetfield ||
-              code2 == Bytecodes::_fast_fgetfield, "");
--        *(bcp + 1) = Bytecodes::java_code(code2);
--      }
-+      *(bcp + 1) = Bytecodes::java_code(code2);
-     }
-   }
-+}
- 
- // Unevolving classes may point to old methods directly
- // from their constant pool caches, itables, and/or vtables. We
+       assert(code2 == Bytecodes::_fast_igetfield ||
+              code2 == Bytecodes::_fast_agetfield ||
+              code2 == Bytecodes::_fast_fgetfield, "");
+-        *(bcp + 1) = Bytecodes::java_code(code2);
+-      }
++      *(bcp + 1) = Bytecodes::java_code(code2);
+     }
+   }
++}
+ 
+ // Unevolving classes may point to old methods directly
+ // from their constant pool caches, itables, and/or vtables. We
 @@ -1559,9 +1549,11 @@ void VM_EnhancedRedefineClasses::ClearCpoolCacheAndUnpatch::do_klass(Klass* k) {
-   constantPoolHandle other_cp = constantPoolHandle(_thread, ik->constants());
- 
-   // Update host klass of anonymous classes (for example, produced by lambdas) to 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()));
-   }
-+  */
- 
-   // FIXME: check new nest_host for hidden
- 
+   constantPoolHandle other_cp = constantPoolHandle(_thread, ik->constants());
+ 
+   // Update host klass of anonymous classes (for example, produced by lambdas) to 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()));
+   }
++  */
+ 
+   // FIXME: check new nest_host for hidden
+ 
 @@ -1596,7 +1588,7 @@ 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, _thread);
-+    ik->methods_do(unpatch_bytecode);
-   }
- }
- 
+ 
+   // If bytecode rewriting is enabled, we also need to unpatch bytecode to force resolution of zeroed entries
+   if (RewriteBytecodes) {
+-    ik->methods_do(unpatch_bytecode, _thread);
++    ik->methods_do(unpatch_bytecode);
+   }
+ }
+ 
 @@ -1628,7 +1620,7 @@ void VM_EnhancedRedefineClasses::MethodDataCleaner::do_klass(Klass* k) {
- }
- 
- 
--void VM_EnhancedRedefineClasses::update_jmethod_ids(TRAPS) {
-+void VM_EnhancedRedefineClasses::update_jmethod_ids(Thread* current) {
-   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();
+ }
+ 
+ 
+-void VM_EnhancedRedefineClasses::update_jmethod_ids(TRAPS) {
++void VM_EnhancedRedefineClasses::update_jmethod_ids(Thread* current) {
+   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();
 @@ -1639,10 +1631,10 @@ void VM_EnhancedRedefineClasses::update_jmethod_ids(TRAPS) {
- 
-     if (jmid != NULL) {
-       // There is a jmethodID, change it to point to the new method
--      methodHandle new_method_h(THREAD, _matching_new_methods[j]);
-+      methodHandle new_method_h(current, _matching_new_methods[j]);
- 
-       if (old_method->new_version() == NULL) {
--        methodHandle old_method_h(THREAD, _matching_old_methods[j]);
-+        methodHandle old_method_h(current, _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 {
+ 
+     if (jmid != NULL) {
+       // There is a jmethodID, change it to point to the new method
+-      methodHandle new_method_h(THREAD, _matching_new_methods[j]);
++      methodHandle new_method_h(current, _matching_new_methods[j]);
+ 
+       if (old_method->new_version() == NULL) {
+-        methodHandle old_method_h(THREAD, _matching_old_methods[j]);
++        methodHandle old_method_h(current, _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 {
 @@ -1864,7 +1856,7 @@ void VM_EnhancedRedefineClasses::mark_dependent_code(InstanceKlass* ik) {
- // subsequent calls to RedefineClasses need only throw away code
- // that depends on the class.
- //
--void VM_EnhancedRedefineClasses::flush_dependent_code(TRAPS) {
-+void VM_EnhancedRedefineClasses::flush_dependent_code() {
-   assert_locked_or_safepoint(Compile_lock);
- 
-   // All dependencies have been recorded from startup or this is a second or
+ // subsequent calls to RedefineClasses need only throw away code
+ // that depends on the class.
+ //
+-void VM_EnhancedRedefineClasses::flush_dependent_code(TRAPS) {
++void VM_EnhancedRedefineClasses::flush_dependent_code() {
+   assert_locked_or_safepoint(Compile_lock);
+ 
+   // All dependencies have been recorded from startup or this is a second or
 @@ -1959,9 +1951,9 @@ void VM_EnhancedRedefineClasses::compute_added_deleted_matching_methods() {
- //      a helper method to be specified. The interesting parameters
- //      that we would like to pass to the helper method are saved in
- //      static global fields in the VM operation.
--void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_oop, TRAPS) {
-+void VM_EnhancedRedefineClasses::redefine_single_class(Thread* current, InstanceKlass* new_class_oop) {
- 
--  HandleMark hm(THREAD);   // make sure handles from this call are freed
-+  HandleMark hm(current);   // make sure handles from this call are freed
- 
-   InstanceKlass* new_class = new_class_oop;
-   InstanceKlass* the_class = InstanceKlass::cast(new_class_oop->old_version());
+ //      a helper method to be specified. The interesting parameters
+ //      that we would like to pass to the helper method are saved in
+ //      static global fields in the VM operation.
+-void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_oop, TRAPS) {
++void VM_EnhancedRedefineClasses::redefine_single_class(Thread* current, InstanceKlass* new_class_oop) {
+ 
+-  HandleMark hm(THREAD);   // make sure handles from this call are freed
++  HandleMark hm(current);   // make sure handles from this call are freed
+ 
+   InstanceKlass* new_class = new_class_oop;
+   InstanceKlass* the_class = InstanceKlass::cast(new_class_oop->old_version());
 @@ -1980,7 +1972,7 @@ 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(THREAD);
-+  update_jmethod_ids(current);
- 
-   _any_class_has_resolved_methods = the_class->has_resolved_methods() || _any_class_has_resolved_methods;
- 
+ 
+   // track number of methods that are EMCP for add_previous_version() call below
+   check_methods_and_mark_as_obsolete();
+-  update_jmethod_ids(THREAD);
++  update_jmethod_ids(current);
+ 
+   _any_class_has_resolved_methods = the_class->has_resolved_methods() || _any_class_has_resolved_methods;
+ 
 @@ -2002,14 +1994,14 @@ void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_
-   */
- 
-   {
--    ResourceMark rm(THREAD);
-+    ResourceMark rm(current);
-     // increment the classRedefinedCount field in the_class and in any
-     // direct and indirect subclasses of the_class
--    increment_class_counter(new_class, THREAD);
-+    increment_class_counter(current, new_class);
-     log_info(redefine, class, load)
-       ("redefined name=%s, count=%d (avail_mem=" UINT64_FORMAT "K)",
-        new_class->external_name(), java_lang_Class::classRedefinedCount(new_class->java_mirror()), os::available_memory() >> 10);
--    Events::log_redefinition(THREAD, "redefined class name=%s, count=%d",
-+    Events::log_redefinition(current, "redefined class name=%s, count=%d",
-                              new_class->external_name(),
-                              java_lang_Class::classRedefinedCount(new_class->java_mirror()));
-   }
+   */
+ 
+   {
+-    ResourceMark rm(THREAD);
++    ResourceMark rm(current);
+     // increment the classRedefinedCount field in the_class and in any
+     // direct and indirect subclasses of the_class
+-    increment_class_counter(new_class, THREAD);
++    increment_class_counter(current, new_class);
+     log_info(redefine, class, load)
+       ("redefined name=%s, count=%d (avail_mem=" UINT64_FORMAT "K)",
+        new_class->external_name(), java_lang_Class::classRedefinedCount(new_class->java_mirror()), os::available_memory() >> 10);
+-    Events::log_redefinition(THREAD, "redefined class name=%s, count=%d",
++    Events::log_redefinition(current, "redefined class name=%s, count=%d",
+                              new_class->external_name(),
+                              java_lang_Class::classRedefinedCount(new_class->java_mirror()));
+   }
 @@ -2018,21 +2010,21 @@ void VM_EnhancedRedefineClasses::redefine_single_class(InstanceKlass* new_class_
- 
- // Increment the classRedefinedCount field in the specific InstanceKlass
- // and in all direct and indirect subclasses.
--void VM_EnhancedRedefineClasses::increment_class_counter(InstanceKlass *ik, TRAPS) {
-+void VM_EnhancedRedefineClasses::increment_class_counter(Thread* current, InstanceKlass *ik) {
-   oop class_mirror = ik->old_version()->java_mirror();
-   Klass* class_oop = java_lang_Class::as_Klass(class_mirror);
-   int new_count = java_lang_Class::classRedefinedCount(class_mirror) + 1;
-   java_lang_Class::set_classRedefinedCount(ik->java_mirror(), new_count);
- }
- 
--void VM_EnhancedRedefineClasses::check_class(InstanceKlass* ik, TRAPS) {
-+void VM_EnhancedRedefineClasses::check_class(InstanceKlass* ik) {
-   if (ik->is_instance_klass() && ik->old_version() != NULL) {
--    HandleMark hm(THREAD);
-+    HandleMark hm(Thread::current());
- 
-     assert(ik->new_version() == NULL, "must be latest version in system dictionary");
- 
-     if (ik->vtable_length() > 0) {
--      ResourceMark rm(THREAD);
-+      ResourceMark rm(Thread::current());
-       assert(ik->vtable().check_no_old_or_obsolete_entries(), "old method found");
-       ik->vtable().verify(tty, true);
-     }
+ 
+ // Increment the classRedefinedCount field in the specific InstanceKlass
+ // and in all direct and indirect subclasses.
+-void VM_EnhancedRedefineClasses::increment_class_counter(InstanceKlass *ik, TRAPS) {
++void VM_EnhancedRedefineClasses::increment_class_counter(Thread* current, InstanceKlass *ik) {
+   oop class_mirror = ik->old_version()->java_mirror();
+   Klass* class_oop = java_lang_Class::as_Klass(class_mirror);
+   int new_count = java_lang_Class::classRedefinedCount(class_mirror) + 1;
+   java_lang_Class::set_classRedefinedCount(ik->java_mirror(), new_count);
+ }
+ 
+-void VM_EnhancedRedefineClasses::check_class(InstanceKlass* ik, TRAPS) {
++void VM_EnhancedRedefineClasses::check_class(InstanceKlass* ik) {
+   if (ik->is_instance_klass() && ik->old_version() != NULL) {
+-    HandleMark hm(THREAD);
++    HandleMark hm(Thread::current());
+ 
+     assert(ik->new_version() == NULL, "must be latest version in system dictionary");
+ 
+     if (ik->vtable_length() > 0) {
+-      ResourceMark rm(THREAD);
++      ResourceMark rm(Thread::current());
+       assert(ik->vtable().check_no_old_or_obsolete_entries(), "old method found");
+       ik->vtable().verify(tty, true);
+     }
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
-index 673688dff84..378e6f78582 100644
+index d0d2f78aa62..252287a3697 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.hpp
 @@ -122,7 +122,7 @@ 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, TRAPS);
-+  static void unpatch_bytecode(Method* method);
- 
-   void root_oops_do(OopClosure *oopClosure);
- 
+   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, TRAPS);
++  static void unpatch_bytecode(Method* method);
+ 
+   void root_oops_do(OopClosure *oopClosure);
+ 
 @@ -131,28 +131,28 @@ class VM_EnhancedRedefineClasses: public VM_GC_Operation {
-   void compute_added_deleted_matching_methods();
- 
-   // Change jmethodIDs to point to the new methods
--  void update_jmethod_ids(TRAPS);
-+  void update_jmethod_ids(Thread* current);
- 
-   // marking methods as old and/or obsolete
-   void check_methods_and_mark_as_obsolete();
-   void transfer_old_native_function_registrations(InstanceKlass* the_class);
- 
-   // Install the redefinition of a class
--  void redefine_single_class(InstanceKlass* new_class_oop, TRAPS);
-+  void redefine_single_class(Thread* current, InstanceKlass* new_class_oop);
- 
-   // Increment the classRedefinedCount field in the specific InstanceKlass
-   // and in all direct and indirect subclasses.
--  void increment_class_counter(InstanceKlass *ik, TRAPS);
-+  void increment_class_counter(Thread* current, InstanceKlass *ik);
- 
-   void mark_dependent_code(InstanceKlass* ik);
- 
--  void flush_dependent_code(TRAPS);
-+  void flush_dependent_code();
- 
-   u8 next_id();
- 
-   void reinitializeJDKClasses();
- 
--  static void check_class(InstanceKlass* k_oop, TRAPS);
-+  static void check_class(InstanceKlass* k_oop);
- 
-   static void dump_methods();
- 
+   void compute_added_deleted_matching_methods();
+ 
+   // Change jmethodIDs to point to the new methods
+-  void update_jmethod_ids(TRAPS);
++  void update_jmethod_ids(Thread* current);
+ 
+   // marking methods as old and/or obsolete
+   void check_methods_and_mark_as_obsolete();
+   void transfer_old_native_function_registrations(InstanceKlass* the_class);
+ 
+   // Install the redefinition of a class
+-  void redefine_single_class(InstanceKlass* new_class_oop, TRAPS);
++  void redefine_single_class(Thread* current, InstanceKlass* new_class_oop);
+ 
+   // Increment the classRedefinedCount field in the specific InstanceKlass
+   // and in all direct and indirect subclasses.
+-  void increment_class_counter(InstanceKlass *ik, TRAPS);
++  void increment_class_counter(Thread* current, InstanceKlass *ik);
+ 
+   void mark_dependent_code(InstanceKlass* ik);
+ 
+-  void flush_dependent_code(TRAPS);
++  void flush_dependent_code();
+ 
+   u8 next_id();
+ 
+   void reinitializeJDKClasses();
+ 
+-  static void check_class(InstanceKlass* k_oop, TRAPS);
++  static void check_class(InstanceKlass* k_oop);
+ 
+   static void dump_methods();
+ 
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0034-Fix-init_method_MemberName-after-Thread-to-JavaThrea.patch

@@ -1,7 +1,7 @@
-From db2d7cd0cd956f297c58baa7500c1440092648bf Mon Sep 17 00:00:00 2001
+From 52c661cebf92d4ad68058ada5d3463e54428aee7 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Sun, 20 Jun 2021 19:42:51 +0200
-Subject: [PATCH 34/39] Fix init_method_MemberName after Thread to JavaThread
+Subject: [PATCH 34/42] Fix init_method_MemberName after Thread to JavaThread
  refactorization
 
 ---
@@ -116,27 +116,27 @@ index 317a006a4ec..36587031fec 100644
    void array_klasses_do(void f(Klass* k, TRAPS), TRAPS);
  
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index b662976afcb..ff012383872 100644
+index 0aeeea4e7a4..e7f26b7d08e 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -292,8 +292,15 @@ class ChangePointersOopClosure : public BasicOopIterateClosure {
-           // Note: we might set NULL at this point, which should force AbstractMethodError at runtime
-           Thread *thread = Thread::current();
-           CallInfo info(new_method, newest, thread);
--          Handle objHandle(thread, obj);
--          MethodHandles::init_method_MemberName(objHandle, info);
-+          oop resolved_method = ResolvedMethodTable::find_method(info.resolved_method());
-+          if (resolved_method != NULL) {
-+            info.set_resolved_method_name_dcevm(resolved_method, thread);
-+            Handle objHandle(thread, obj);
-+            MethodHandles::init_method_MemberName(objHandle, info);
-+          } else {
-+            assert(0, "Must be resolved");
-+            java_lang_invoke_MemberName::set_method(obj, NULL);
-+          }
-         } else {
-           java_lang_invoke_MemberName::set_method(obj, NULL);
-         }
+           // Note: we might set NULL at this point, which should force AbstractMethodError at runtime
+           Thread *thread = Thread::current();
+           CallInfo info(new_method, newest, thread);
+-          Handle objHandle(thread, obj);
+-          MethodHandles::init_method_MemberName(objHandle, info);
++          oop resolved_method = ResolvedMethodTable::find_method(info.resolved_method());
++          if (resolved_method != NULL) {
++            info.set_resolved_method_name_dcevm(resolved_method, thread);
++            Handle objHandle(thread, obj);
++            MethodHandles::init_method_MemberName(objHandle, info);
++          } else {
++            assert(0, "Must be resolved");
++            java_lang_invoke_MemberName::set_method(obj, NULL);
++          }
+         } else {
+           java_lang_invoke_MemberName::set_method(obj, NULL);
+         }
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0035-Fix-implicit-conversion-of-NULL-constant-to-bool.patch

@@ -1,7 +1,7 @@
-From bfbbae66340a223328542722b299f67c21166c52 Mon Sep 17 00:00:00 2001
+From 523ce6dd1559af84ebd6e4f10e7de9142f88d9d0 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Mon, 21 Jun 2021 20:44:17 +0200
-Subject: [PATCH 35/39] Fix "implicit conversion of NULL constant to 'bool'"
+Subject: [PATCH 35/42] Fix "implicit conversion of NULL constant to 'bool'"
 
 ---
  src/hotspot/share/prims/jvmtiRedefineClasses.cpp | 2 +-

jb/project/tools/patches/dcevm/0036-Fix-pass-SystemDictionary-resolve_from_stream-cl_inf.patch

@@ -1,7 +1,7 @@
-From 5bb6ef0fc266a748232c7c51191deab47d4f3857 Mon Sep 17 00:00:00 2001
+From df4c29b24d41069168ee5647b2737348d9902090 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Wed, 30 Jun 2021 18:30:00 +0200
-Subject: [PATCH 36/39] Fix, pass SystemDictionary::resolve_from_stream cl_info
+Subject: [PATCH 36/42] Fix, pass SystemDictionary::resolve_from_stream cl_info
  param
 
 ---
@@ -9,27 +9,27 @@ Subject: [PATCH 36/39] Fix, pass SystemDictionary::resolve_from_stream cl_info
  1 file changed, 7 insertions(+), 1 deletion(-)
 
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index ff012383872..cbcb484a290 100644
+index e7f26b7d08e..4d145f30100 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -920,10 +920,16 @@ jvmtiError VM_EnhancedRedefineClasses::load_new_class_versions(TRAPS) {
-       }
- 
-     } else {
-+      ClassLoadInfo cl_info(protection_domain,
-+                            NULL,     // dynamic_nest_host
-+                            Handle(), // classData
-+                            false,    // is_hidden
-+                            !the_class->is_non_strong_hidden(),    // is_strong_hidden
-+                            true);    // FIXME: check if correct. can_access_vm_annotations
-       k = SystemDictionary::resolve_from_stream(&st,
-                                                 the_class_sym,
-                                                 the_class_loader,
--                                                protection_domain,
-+                                                cl_info,
-                                                 the_class,
-                                                 THREAD);
-     }
+       }
+ 
+     } else {
++      ClassLoadInfo cl_info(protection_domain,
++                            NULL,     // dynamic_nest_host
++                            Handle(), // classData
++                            false,    // is_hidden
++                            !the_class->is_non_strong_hidden(),    // is_strong_hidden
++                            true);    // FIXME: check if correct. can_access_vm_annotations
+       k = SystemDictionary::resolve_from_stream(&st,
+                                                 the_class_sym,
+                                                 the_class_loader,
+-                                                protection_domain,
++                                                cl_info,
+                                                 the_class,
+                                                 THREAD);
+     }
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0037-Search-for-affected-classes-in-all-initialized-class.patch

@@ -1,7 +1,7 @@
-From 563e06d1c56cfc3f4e93e3975cd6c2dab8183c98 Mon Sep 17 00:00:00 2001
+From 47ae71afaf12c7bab4f928579b154ec72aad3c02 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Wed, 30 Jun 2021 18:50:38 +0200
-Subject: [PATCH 37/39] Search for affected classes in all initialized classes
+Subject: [PATCH 37/42] Search for affected classes in all initialized classes
  in cld
 
 Fix also case when lambda interface is redefined. Lambda class is
@@ -83,31 +83,31 @@ index da712eaf55f..ff391ec74fc 100644
    static void classes_do(void f(Klass* const));
    static void methods_do(void f(Method*));
 diff --git a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
-index cbcb484a290..43899ea3d48 100644
+index 4d145f30100..8615806ac98 100644
 --- a/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 +++ b/src/hotspot/share/prims/jvmtiEnhancedRedefineClasses.cpp
 @@ -2170,17 +2170,12 @@ jvmtiError VM_EnhancedRedefineClasses::find_sorted_affected_classes(TRAPS) {
-   {
-     MutexLocker mcld(ClassLoaderDataGraph_lock);
- 
--    // 0. we can't use ClassLoaderDataGraph::classes_do since classes can be uninitialized in cld,
--    // fully initialized class is in system dictionary
-+    // We can't use ClassLoaderDataGraph::classes_do since classes can be uninitialized in cld,
-+    // fully initialized class is in system dictionary, but hidden classes are excluded. Therefore
-+    // we use special method iterating over initialized classes only
-     // ClassLoaderDataGraph::classes_do(&closure);
- 
--    // 1. Scan over dictionaries
--    ClassLoaderDataGraph::dictionary_classes_do(&closure);
--
--    // 2. Anonymous or hidden class is not in dictionary, we have to iterate anonymous cld directly, but there is race cond...
--    // TODO: review ... anonymous class is added to cld before InstanceKlass initialization,
--    //                  find out how to check if the InstanceKlass is initialized
--    ClassLoaderDataGraph::anonymous_or_hidden_classes_do(&closure);
-+    ClassLoaderDataGraph::initialized_classes_do(&closure);
-   }
- 
-   log_trace(redefine, class, load)("%d classes affected", _affected_klasses->length());
+   {
+     MutexLocker mcld(ClassLoaderDataGraph_lock);
+ 
+-    // 0. we can't use ClassLoaderDataGraph::classes_do since classes can be uninitialized in cld,
+-    // fully initialized class is in system dictionary
++    // We can't use ClassLoaderDataGraph::classes_do since classes can be uninitialized in cld,
++    // fully initialized class is in system dictionary, but hidden classes are excluded. Therefore
++    // we use special method iterating over initialized classes only
+     // ClassLoaderDataGraph::classes_do(&closure);
+ 
+-    // 1. Scan over dictionaries
+-    ClassLoaderDataGraph::dictionary_classes_do(&closure);
+-
+-    // 2. Anonymous or hidden class is not in dictionary, we have to iterate anonymous cld directly, but there is race cond...
+-    // TODO: review ... anonymous class is added to cld before InstanceKlass initialization,
+-    //                  find out how to check if the InstanceKlass is initialized
+-    ClassLoaderDataGraph::anonymous_or_hidden_classes_do(&closure);
++    ClassLoaderDataGraph::initialized_classes_do(&closure);
+   }
+ 
+   log_trace(redefine, class, load)("%d classes affected", _affected_klasses->length());
 -- 
 2.23.0
 

jb/project/tools/patches/dcevm/0038-Fix-compilation-issue.patch

@@ -1,7 +1,7 @@
-From acad06204bc4f7e7a89e9a44ded6b9d27082327b Mon Sep 17 00:00:00 2001
+From e9c3042e13c5fe58cac7409b1f93a4dc287cc14a Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Wed, 30 Jun 2021 18:58:47 +0200
-Subject: [PATCH 38/39] Fix compilation issue
+Subject: [PATCH 38/42] Fix compilation issue
 
 ---
  src/hotspot/share/interpreter/linkResolver.cpp | 4 ++--

jb/project/tools/patches/dcevm/0039-Remove-duplicated-lambdaFormInvokers.cpp.patch

@@ -1,7 +1,7 @@
-From 563465b112da14e8b81ef32eefc06c79015a809b Mon Sep 17 00:00:00 2001
+From f303ef1fec703144efe6b9989a1a71fae0fb4263 Mon Sep 17 00:00:00 2001
 From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
 Date: Tue, 27 Jul 2021 21:32:51 +0200
-Subject: [PATCH 39/39] Remove duplicated lambdaFormInvokers.cpp
+Subject: [PATCH 39/42] Remove duplicated lambdaFormInvokers.cpp
 
 ---
  .../share/classfile/lambdaFormInvokers.cpp    | 152 ------------------

jb/project/tools/patches/dcevm/0040-JBR-3867-update-keys-of-jvmti-TAG-map-after-redefini.patch

@@ -0,0 +1,222 @@
+From 9cb4aaf17c8e35f39aed0dfa33e173b40968eee6 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Sun, 10 Oct 2021 20:25:30 +0200
+Subject: [PATCH 40/42] JBR-3867 - update keys of jvmti TAG map after
+ redefinition
+
+jdwp keeps relation class_ptr->class_ref in jvmti tag. class_ptr is used
+as a tag key, tag value is refnode. There are new class_ptrs after
+redefinition, therefore jdwp redefinition method update all affected
+keys in the tag map.
+---
+ src/hotspot/share/prims/jvmtiExtensions.cpp   | 24 ++++++++++++++
+ .../share/native/libjdwp/VirtualMachineImpl.c | 20 +++++++++++
+ .../share/native/libjdwp/commonRef.c          | 29 ++++++++++++++++
+ .../share/native/libjdwp/commonRef.h          |  2 ++
+ .../share/native/libjdwp/util.c               | 33 +++++++++++++++++++
+ .../share/native/libjdwp/util.h               |  3 ++
+ 6 files changed, 111 insertions(+)
+
+diff --git a/src/hotspot/share/prims/jvmtiExtensions.cpp b/src/hotspot/share/prims/jvmtiExtensions.cpp
+index a3fc430e1d1..ab2e663b95d 100644
+--- a/src/hotspot/share/prims/jvmtiExtensions.cpp
++++ b/src/hotspot/share/prims/jvmtiExtensions.cpp
+@@ -49,6 +49,15 @@ static jvmtiError JNICALL IsClassUnloadingEnabled(const jvmtiEnv* env, ...) {
+   return JVMTI_ERROR_NONE;
+ }
+ 
++// extension function
++static jvmtiError JNICALL IsEnhancedClassRedefinitionEnabled(const jvmtiEnv* env, jboolean* enabled, ...) {
++  if (enabled == NULL) {
++    return JVMTI_ERROR_NULL_POINTER;
++  }
++  *enabled = (jboolean)AllowEnhancedClassRedefinition;
++  return JVMTI_ERROR_NONE;
++}
++
+ // register extension functions and events. In this implementation we
+ // have a single extension function (to prove the API) that tests if class
+ // unloading is enabled or disabled. We also have a single extension event
+@@ -88,6 +97,21 @@ void JvmtiExtensions::register_extensions() {
+     event_params
+   };
+   _ext_events->append(&ext_event);
++
++  static jvmtiParamInfo func_params_enh_redef[] = {
++    { (char*)"IsEnhancedClassRedefinitionEnabled", JVMTI_KIND_OUT,  JVMTI_TYPE_JBOOLEAN, JNI_FALSE }
++
++  };
++  static jvmtiExtensionFunctionInfo ext_func_enh_redef = {
++    (jvmtiExtensionFunction)IsEnhancedClassRedefinitionEnabled,
++    (char*)"com.sun.hotspot.functions.IsEnhancedClassRedefinitionEnabled",
++    (char*)"Tell if enhanced class redefinition is enabled (-noclassgc)",
++    sizeof(func_params_enh_redef)/sizeof(func_params_enh_redef[0]),
++    func_params_enh_redef,
++    0,              // no non-universal errors
++    NULL
++  };
++  _ext_functions->append(&ext_func_enh_redef);
+ }
+ 
+ 
+diff --git a/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c b/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c
+index c07bdac2922..7e3070d7d1d 100644
+--- a/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c
++++ b/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c
+@@ -477,6 +477,14 @@ redefineClasses(PacketInputStream *in, PacketOutputStream *out)
+     if (ok == JNI_TRUE) {
+         jvmtiError error;
+ 
++        jlong classIds[classCount];
++
++        if (gdata->isEnhancedClassRedefinitionEnabled) {
++            for (i = 0; i < classCount; ++i) {
++              classIds[i] = commonRef_refToID(env, classDefs[i].klass);
++            }
++        }
++
+         error = JVMTI_FUNC_PTR(gdata->jvmti,RedefineClasses)
+                         (gdata->jvmti, classCount, classDefs);
+         if (error != JVMTI_ERROR_NONE) {
+@@ -486,6 +494,18 @@ redefineClasses(PacketInputStream *in, PacketOutputStream *out)
+             for ( i = 0 ; i < classCount; i++ ) {
+                 eventHandler_freeClassBreakpoints(classDefs[i].klass);
+             }
++
++            if (gdata->isEnhancedClassRedefinitionEnabled) {
++                /* Update tags in jvmti to use new classes */
++                for ( i = 0 ; i < classCount; i++ ) {
++                    /* pointer in classIds[i] is updated by advanced redefinition to a new class */
++                    error = commonRef_updateTags(env, classIds[i]);
++                    if (error != JVMTI_ERROR_NONE) {
++                        break;
++                    }
++                }
++            }
++
+         }
+     }
+ 
+diff --git a/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.c b/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.c
+index bc7ddb660bf..f8cb8e36f17 100644
+--- a/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.c
++++ b/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.c
+@@ -712,3 +712,32 @@ commonRef_unlock(void)
+ {
+     debugMonitorExit(gdata->refLock);
+ }
++
++/*
++ * Update JVMTI tags, used from enhanced redefinition
++ */
++jvmtiError
++commonRef_updateTags(JNIEnv *env, jlong id)
++{
++    jvmtiError error;
++
++    error = JVMTI_ERROR_NONE;
++
++    if (id == NULL_OBJECT_ID) {
++        return error;
++    }
++
++    debugMonitorEnter(gdata->refLock); {
++        RefNode *node;
++
++        node = findNodeByID(env, id);
++        if (node != NULL) {
++            error = JVMTI_FUNC_PTR(gdata->jvmti, SetTag)
++                                  (gdata->jvmti, node->ref, ptr_to_jlong(node));
++        } else {
++            printf("Node not found\n");
++        }
++    } debugMonitorExit(gdata->refLock);
++
++    return error;
++}
+diff --git a/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.h b/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.h
+index c3700f8c743..35c77e4adbf 100644
+--- a/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.h
++++ b/src/jdk.jdwp.agent/share/native/libjdwp/commonRef.h
+@@ -43,4 +43,6 @@ void commonRef_compact(void);
+ void commonRef_lock(void);
+ void commonRef_unlock(void);
+ 
++jvmtiError commonRef_updateTags(JNIEnv *env, jlong id);
++
+ #endif
+diff --git a/src/jdk.jdwp.agent/share/native/libjdwp/util.c b/src/jdk.jdwp.agent/share/native/libjdwp/util.c
+index 2403c5273ba..b4a5ad183e0 100644
+--- a/src/jdk.jdwp.agent/share/native/libjdwp/util.c
++++ b/src/jdk.jdwp.agent/share/native/libjdwp/util.c
+@@ -43,6 +43,7 @@ BackendGlobalData *gdata = NULL;
+ static jboolean isInterface(jclass clazz);
+ static jboolean isArrayClass(jclass clazz);
+ static char * getPropertyUTF8(JNIEnv *env, char *propertyName);
++static jboolean isEnhancedClassRedefinitionEnabled(JNIEnv *env);
+ 
+ /* Save an object reference for use later (create a NewGlobalRef) */
+ void
+@@ -285,6 +286,8 @@ util_initialize(JNIEnv *env)
+             }
+         }
+ 
++        gdata->isEnhancedClassRedefinitionEnabled = isEnhancedClassRedefinitionEnabled(env);
++
+     } END_WITH_LOCAL_REFS(env);
+ 
+ }
+@@ -1701,6 +1704,36 @@ getPropertyUTF8(JNIEnv *env, char *propertyName)
+     return value;
+ }
+ 
++static jboolean
++isEnhancedClassRedefinitionEnabled(JNIEnv *env)
++{
++    jvmtiError error;
++    jint count, i;
++    jvmtiExtensionFunctionInfo* ext_funcs;
++
++    error = JVMTI_FUNC_PTR(gdata->jvmti,GetExtensionFunctions)
++                (gdata->jvmti, &count, &ext_funcs);
++    if (error != JVMTI_ERROR_NONE) {
++        return JNI_FALSE;
++    }
++
++    for (i=0; i<count; i++) {
++        if (strcmp(ext_funcs[i].id, (char*)"com.sun.hotspot.functions.IsEnhancedClassRedefinitionEnabled") == 0) {
++            jboolean enabled;
++            error = (*ext_funcs[i].func)(gdata->jvmti, &enabled);
++
++            if (error != JVMTI_ERROR_NONE) {
++                return JNI_FALSE;
++            } else {
++                return enabled;
++            }
++        }
++    }
++
++    return JNI_FALSE;
++}
++
++
+ jboolean
+ isMethodObsolete(jmethodID method)
+ {
+diff --git a/src/jdk.jdwp.agent/share/native/libjdwp/util.h b/src/jdk.jdwp.agent/share/native/libjdwp/util.h
+index f62b5c409f0..6de8f17bb23 100644
+--- a/src/jdk.jdwp.agent/share/native/libjdwp/util.h
++++ b/src/jdk.jdwp.agent/share/native/libjdwp/util.h
+@@ -133,6 +133,9 @@ typedef struct {
+     int           objectsByIDsize;
+     int           objectsByIDcount;
+ 
++    /* true if enhanced class redefinition is enabled */
++    jboolean isEnhancedClassRedefinitionEnabled;
++
+      /* Indication that the agent has been loaded */
+      jboolean isLoaded;
+ 
+-- 
+2.23.0
+

jb/project/tools/patches/dcevm/0041-JBR-3867-fix-msvc-compilation-issue-with-non-const-a.patch

@@ -0,0 +1,54 @@
+From db54a42adf258e2ba3459fe017221cf2cf49c33f Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Mon, 11 Oct 2021 20:22:26 +0200
+Subject: [PATCH 41/42] JBR-3867 - fix msvc compilation issue with non const
+ array on stack
+
+---
+ .../share/native/libjdwp/VirtualMachineImpl.c      | 14 ++++++++++----
+ 1 file changed, 10 insertions(+), 4 deletions(-)
+
+diff --git a/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c b/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c
+index 7e3070d7d1d..669fac7cb5b 100644
+--- a/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c
++++ b/src/jdk.jdwp.agent/share/native/libjdwp/VirtualMachineImpl.c
+@@ -477,11 +477,16 @@ redefineClasses(PacketInputStream *in, PacketOutputStream *out)
+     if (ok == JNI_TRUE) {
+         jvmtiError error;
+ 
+-        jlong classIds[classCount];
++        jlong* classIds = NULL;
+ 
+         if (gdata->isEnhancedClassRedefinitionEnabled) {
+-            for (i = 0; i < classCount; ++i) {
+-              classIds[i] = commonRef_refToID(env, classDefs[i].klass);
++            classIds = jvmtiAllocate(classCount*(int)sizeof(jlong));
++            if (classIds == NULL) {
++                outStream_setError(out, JDWP_ERROR(OUT_OF_MEMORY));
++                return JNI_TRUE;
++            }
++            for (i = 0; i < classCount; i++) {
++                classIds[i] = commonRef_refToID(env, classDefs[i].klass);
+             }
+         }
+ 
+@@ -495,7 +500,7 @@ redefineClasses(PacketInputStream *in, PacketOutputStream *out)
+                 eventHandler_freeClassBreakpoints(classDefs[i].klass);
+             }
+ 
+-            if (gdata->isEnhancedClassRedefinitionEnabled) {
++            if (gdata->isEnhancedClassRedefinitionEnabled && classIds != NULL) {
+                 /* Update tags in jvmti to use new classes */
+                 for ( i = 0 ; i < classCount; i++ ) {
+                     /* pointer in classIds[i] is updated by advanced redefinition to a new class */
+@@ -504,6 +509,7 @@ redefineClasses(PacketInputStream *in, PacketOutputStream *out)
+                         break;
+                     }
+                 }
++                jvmtiDeallocate((void*) classIds);
+             }
+ 
+         }
+-- 
+2.23.0
+

jb/project/tools/patches/dcevm/0042-Attempt-to-fix-JBR-3887.patch

@@ -0,0 +1,31 @@
+From 976b5f8b1326fee64febef8771d7cebee46bada9 Mon Sep 17 00:00:00 2001
+From: Vladimir Dvorak <vladimir.dvorak@jetbrains.com>
+Date: Tue, 19 Oct 2021 17:02:35 +0200
+Subject: [PATCH 42/42] Attempt to fix JBR-3887
+
+---
+ src/hotspot/share/prims/jvmtiExtensions.cpp | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/src/hotspot/share/prims/jvmtiExtensions.cpp b/src/hotspot/share/prims/jvmtiExtensions.cpp
+index ab2e663b95d..698d32a7228 100644
+--- a/src/hotspot/share/prims/jvmtiExtensions.cpp
++++ b/src/hotspot/share/prims/jvmtiExtensions.cpp
+@@ -50,7 +50,13 @@ static jvmtiError JNICALL IsClassUnloadingEnabled(const jvmtiEnv* env, ...) {
+ }
+ 
+ // extension function
+-static jvmtiError JNICALL IsEnhancedClassRedefinitionEnabled(const jvmtiEnv* env, jboolean* enabled, ...) {
++static jvmtiError JNICALL IsEnhancedClassRedefinitionEnabled(const jvmtiEnv* env, ...) {
++  jboolean* enabled = NULL;
++  va_list ap;
++
++  va_start(ap, env);
++  enabled = va_arg(ap, jboolean *);
++  va_end(ap);
+   if (enabled == NULL) {
+     return JVMTI_ERROR_NULL_POINTER;
+   }
+-- 
+2.23.0
+

jb/project/tools/test/perfcmp.sh

@@ -0,0 +1,83 @@
+#!/bin/bash -x
+
+usage ()
+{
+echo "Usage: perfcmp.sh [options] <test_results_cur> <test_results_ref> <results> <test_prefix> <noHeaders>"
+echo "Options:"
+echo -e " -h, --help\tdisplay this help"
+echo -e " -tc\tprint teacmity statistic"
+echo -e "test_results_cur - the file with  metrics values for the current measuring"
+echo -e "test_results_ref - the file with metrics values for the reference measuring"
+echo -e "results - results of comaprison"
+echo -e "test_prefix - specifys measuring type, makes sense for enabled -tc, by default no prefixes"
+echo -e "noHeaders - by default 1-st line contains headers"
+echo -e ""
+echo -e "test_results_* files content should be in csv format with header and tab separator:"
+echo -e "The 1-st column is the test name"
+echo -e "The 2-st column is the test value"
+echo -e ""
+echo -e "Example:"
+echo -e "Test           Value"
+echo -e "Testname       51.54"
+}
+
+while [ -n "$1" ]
+do
+case "$1" in
+-h | --help) usage
+exit 1 ;;
+-tc) tc=1
+  shift
+  break  ;;
+*) break;;
+esac
+done
+
+if [[ "$#" < "3" ]]; then
+    echo "Error: Invalid arguments"
+    usage
+    exit 1
+fi
+
+curFile=$1
+refFile=$2
+resFile=$3
+testNamePrefix=$4
+noHeaders=$5
+echo $curFile
+echo $refFile
+echo $resFile
+
+curValues=`cat "$curFile" | cut -f 2 | tr -d '\t'`
+if [ -z noHeaders ]; then
+  curValuesHeader=`echo "$curValues" | head -n +1`_cur
+  header=`cat "$refFile" | head -n +1 | awk -F'\t' -v x=$curValuesHeader '{print "  "$1"\t"$2"_ref\t"x"\tratio"}'`
+  testContent=`paste -d '\t' $refFile <(echo "$curValues") | tail -n +2`
+else
+  testContent=`paste -d '\t' $refFile <(echo "$curValues") | tail -n +1`
+fi
+
+testContent=`echo "$testContent" | awk -F'\t' '{ if ($3>$2+$2*0.1) {print "* "$1"\t"$2"\t"$3"\t"(($2==0)?"-":$3/$2)} else {print "  "$1"\t"$2"\t"$3"\t"(($2==0)?"-":$3/$2)} }'`
+if [ -z noHeaders ]; then
+  echo "$header" > $resFile
+fi
+echo "$testContent" >> $resFile
+cat "$resFile" | tr '\t' ';' | column -t -s ';' | tee $resFile
+
+if [ -z $tc ]; then
+exit 0
+fi
+
+echo "$testContent" 2>&1 | (
+    while read -r s; do
+        testname=`echo "$s" | cut -f 1 | tr -d "[:space:]" |  tr -d "*"`
+        duration=`echo "$s" | cut -f 3`
+        failed=`echo "$s" | cut -c1 | grep -c "*"`
+        echo \#\#teamcity[testStarted name=\'$testNamePrefix$testname\']
+        echo "===>$s"
+        echo \#\#teamcity[buildStatisticValue key=\'$testNamePrefix$testname\' value=\'$duration\']
+        [ $failed -eq 1 ] && echo \#\#teamcity[testFailed name=\'$testNamePrefix$testname\' message=\'$s\']
+        echo \#\#teamcity[testFinished name=\'$testNamePrefix$testname\' duration=\'$duration\']
+        failed=0
+    done
+)

jb/project/tools/windows/scripts/pack_x64.sh

@@ -42,7 +42,6 @@ function pack_jbr {
 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" ] || [ "$bundle_type" == "fd" ]; then
@@ -53,7 +52,7 @@ pack_jbr jbr${jbr_name_postfix} jbr
 pack_jbr jbrsdk${jbr_name_postfix} jbrsdk
 
 if [ -z "$bundle_type" ]; then
-  JBRSDK_TEST=$JBRSDK_BASE_NAME-windows-test-x64-b$build_number
+  JBRSDK_TEST=$JBRSDK_BUNDLE-$JBSDK_VERSION-windows-test-x64-b$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

make/JBRApi.gmk

@@ -1,20 +1,80 @@
-include Makefile
-include make/MainSupport.gmk
+#
+# Copyright 2000-2021 JetBrains s.r.o.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 
-.PHONY: jbr-api
+include $(SPEC)
+include MakeBase.gmk
+include JavaCompilation.gmk
 
-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_ROOT_DIR := $(TOPDIR)/src/jetbrains.api
+JBR_API_GENSRC_TEMPLATES := $(JBR_API_ROOT_DIR)/templates
+JBR_API_SRC_DIR          := $(JBR_API_ROOT_DIR)/src
+JBR_API_OUTPUT_DIR := $(OUTPUTDIR)/jbr-api
+JBR_API_GENSRC_DIR := $(JBR_API_OUTPUT_DIR)/gensrc
+JBR_API_BIN_DIR    := $(JBR_API_OUTPUT_DIR)/bin
+JBR_API_VERSION_PROPERTIES := $(JBR_API_ROOT_DIR)/version.properties
 
-  jbr-api:
-	$(ECHO) "BUILD_DIR=$(OUTPUTDIR)" > $(OUT)
-	$(ECHO) "BOOT_JDK=\"$(BOOT_JDK)\"" >> $(OUT)
+JBR_API_GENSRC_SOURCES := $(call FindFiles, $(JBR_API_GENSRC_TEMPLATES))
+JBR_API_GENSRC_FILES := $(foreach f, $(call FindFiles, $(JBR_API_GENSRC_TEMPLATES)/com), \
+    $(JBR_API_GENSRC_DIR)/$(call RelativePath, $f, $(JBR_API_GENSRC_TEMPLATES)))
+JBR_API_SRC_FILES := $(call FindFiles, $(JBR_API_SRC_DIR))
 
+ifeq ($(JBR_API_JBR_VERSION),)
+  JBR_API_JBR_VERSION := <DEVELOPMENT>
+  JBR_API_FAIL_ON_HASH_MISMATCH := false
+else
+  .PHONY: $(JBR_API_VERSION_PROPERTIES)
+  JBR_API_FAIL_ON_HASH_MISMATCH := true
 endif
+
+ARCHIVE_BUILD_JBR_API_BIN := $(JBR_API_BIN_DIR)
+$(eval $(call SetupJavaCompilation, BUILD_JBR_API, \
+    SMALL_JAVA := true, \
+    COMPILER := bootjdk, \
+    SRC := $(JBR_API_GENSRC_DIR) $(JBR_API_SRC_DIR), \
+    EXTRA_FILES := $(JBR_API_GENSRC_FILES), \
+    BIN := $(JBR_API_BIN_DIR), \
+    JAR := $(JBR_API_OUTPUT_DIR)/jbr-api.jar, \
+))
+
+$(eval $(call SetupJarArchive, BUILD_JBR_API_SOURCES_JAR, \
+    DEPENDENCIES := $(JBR_API_GENSRC_FILES) $(JBR_API_SRC_FILES), \
+    SRCS := $(JBR_API_GENSRC_DIR) $(JBR_API_SRC_DIR), \
+    JAR := $(JBR_API_OUTPUT_DIR)/jbr-api-sources.jar, \
+    SUFFIXES := .java, \
+    BIN := $(JBR_API_BIN_DIR), \
+))
+
+$(JBR_API_GENSRC_FILES): $(JBR_API_GENSRC_SOURCES) $(JBR_API_SRC_FILES) $(JBR_API_VERSION_PROPERTIES)
+	$(ECHO) Generating sources for JBR API
+	$(JAVA_CMD) $(JAVA_FLAGS_SMALL) "$(JBR_API_GENSRC_TEMPLATES)/Gensrc.java" \
+	    "$(TOPDIR)/src" "$(JBR_API_OUTPUT_DIR)" "$(JBR_API_JBR_VERSION)"
+
+jbr-api-check-version: $(JBR_API_GENSRC_FILES) $(JBR_API_SRC_FILES) $(JBR_API_VERSION_PROPERTIES)
+	$(JAVA_CMD) $(JAVA_FLAGS_SMALL) "$(JBR_API_GENSRC_TEMPLATES)/CheckVersion.java" \
+	    "$(JBR_API_ROOT_DIR)" "$(JBR_API_GENSRC_DIR)" "$(JBR_API_FAIL_ON_HASH_MISMATCH)"
+
+jbr-api: $(BUILD_JBR_API) $(BUILD_JBR_API_SOURCES_JAR) jbr-api-check-version
+
+.PHONY: jbr-api jbr-api-check-version
+
+ifneq ($(JBR_API_CONF_FILE),)
+  $(JBR_API_CONF_FILE): $(JBR_API_GENSRC_FILES)
+	$(ECHO) "VERSION=`$(CAT) $(JBR_API_OUTPUT_DIR)/jbr-api.version`" > $(JBR_API_CONF_FILE)
+	$(ECHO) "JAR=$(JBR_API_OUTPUT_DIR)/jbr-api.jar" >> $(JBR_API_CONF_FILE)
+	$(ECHO) "SOURCES_JAR=$(JBR_API_OUTPUT_DIR)/jbr-api-sources.jar" >> $(JBR_API_CONF_FILE)
+  jbr-api: $(JBR_API_CONF_FILE)
+  .PHONY: $(JBR_API_CONF_FILE)
+endif

make/Main.gmk

@@ -1325,6 +1325,14 @@ create-main-targets-include:
 	  @$(ECHO) ALL_MAIN_TARGETS := $(sort $(ALL_TARGETS)) > \
 	      $(MAKESUPPORT_OUTPUTDIR)/main-targets.gmk
 
+################################################################################
+# JBR API
+
+$(eval $(call SetupTarget, jbr-api, \
+    MAKEFILE := JBRApi, \
+    TARGET := jbr-api \
+))
+
 ################################################################################
 # Hook to include the corresponding custom file, if present.
 $(eval $(call IncludeCustomExtension, Main-post.gmk))

make/conf/module-loader-map.conf

@@ -55,8 +55,6 @@ BOOT_MODULES= \
     jdk.sctp \
     jdk.unsupported \
     jdk.naming.rmi \
-    jetbrains.api \
-    jetbrains.api.impl \
     #
 
 # Modules that directly or indirectly requiring upgradeable modules

modules.list

@@ -49,6 +49,4 @@ jdk.unsupported,
 jdk.xml.dom,
 jdk.zipfs,
 jdk.hotspot.agent,
-jetbrains.api,
-jetbrains.api.impl,
 jdk.jcmd

src/hotspot/os/windows/os_windows.cpp

@@ -2020,7 +2020,11 @@ void os::win32::print_windows_version(outputStream* st) {
 
   case 10000:
     if (is_workstation) {
-      st->print("10");
+      if (build_number >= 22000) {
+        st->print("11");
+      } else {
+        st->print("10");
+      }
     } else {
       // distinguish Windows Server 2016 and 2019 by build number
       // Windows server 2019 GA 10/2018 build number is 17763

src/hotspot/share/runtime/arguments.cpp

@@ -117,6 +117,8 @@ bool Arguments::_has_jimage = false;
 
 char* Arguments::_ext_dirs = NULL;
 
+GrowableArray<const char *> *Arguments::_unrecognized_vm_options = NULL;
+
 bool PathString::set_value(const char *value) {
   if (_value != NULL) {
     FreeHeap(_value);
@@ -132,7 +134,7 @@ bool PathString::set_value(const char *value) {
   return true;
 }
 
-void PathString::append_value(const char *value) {
+void PathString::append_value(const char *value, const char *separator) {
   char *sp;
   size_t len = 0;
   if (value != NULL) {
@@ -145,7 +147,7 @@ void PathString::append_value(const char *value) {
     if (sp != NULL) {
       if (_value != NULL) {
         strcpy(sp, _value);
-        strcat(sp, os::path_separator());
+        strcat(sp, separator);
         strcat(sp, value);
         FreeHeap(_value);
       } else {
@@ -1217,8 +1219,10 @@ bool Arguments::process_argument(const char* arg,
     }
   } else {
     if (ignore_unrecognized) {
+      store_unrecognized_vm_option(arg);
       return true;
     }
+
     jio_fprintf(defaultStream::error_stream(),
                 "Unrecognized VM option '%s'\n", argname);
     JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true);
@@ -1229,7 +1233,7 @@ bool Arguments::process_argument(const char* arg,
                   fuzzy_matched->name(),
                   (fuzzy_matched->is_bool()) ? "" : "=<value>");
     }
-  }
+ }
 
   // allow for commandline "commenting out" options like -XX:#+Verbose
   return arg[0] == '#';
@@ -2017,9 +2021,38 @@ bool Arguments::check_vm_args_consistency() {
   return status;
 }
 
+void Arguments::set_unrecognized_vm_options_property() {
+  if (_unrecognized_vm_options != NULL) {
+    int num_of_entries = _unrecognized_vm_options->length();
+    const char* option_string = _unrecognized_vm_options->at(0);
+
+    SystemProperty* prop = new SystemProperty("java.vm.unrecognized.options", "", true, false);
+
+    prop->set_value(option_string);
+
+    for (int i = 1; i < num_of_entries; i++) {
+      option_string = _unrecognized_vm_options->at(i);
+      prop->append_value(option_string, "\n");
+    }
+
+    PropertyList_add(&_system_properties, prop);
+  }
+}
+
+void Arguments::store_unrecognized_vm_option(const char* option) {
+  if (_unrecognized_vm_options == NULL) {
+    // Create GrowableArray lazily, only if unrecognized vm options found
+    _unrecognized_vm_options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<const char *>(10, mtArguments);
+  }
+  _unrecognized_vm_options->push(option);
+}
+
 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
   const char* option_type) {
-  if (ignore) return false;
+  if (ignore) {
+     store_unrecognized_vm_option(option->optionString);
+     return false;
+  }
 
   const char* spacer = " ";
   if (option_type == NULL) {

src/hotspot/share/runtime/arguments.hpp

@@ -62,7 +62,8 @@ class PathString : public CHeapObj<mtArguments> {
   char* value() const { return _value; }
 
   bool set_value(const char *value);
-  void append_value(const char *value);
+  void append_value(const char *value, const char *delemiter);
+  void append_value(const char *value) { append_value(value, os::path_separator()); }
 
   PathString(const char* value);
   ~PathString();
@@ -346,6 +347,10 @@ class Arguments : AllStatic {
   static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
   static bool xdebug_mode()             { return _xdebug_mode; }
 
+  // List of unrecognized VM options
+  static GrowableArray<const char *> *_unrecognized_vm_options;
+  static void store_unrecognized_vm_option(const char* option);
+
   // preview features
   static bool _enable_preview;
 
@@ -559,6 +564,9 @@ class Arguments : AllStatic {
   // Update/Initialize System properties after JDK version number is known
   static void init_version_specific_system_properties();
 
+  // Store unrecognized vm options to system property
+  static void set_unrecognized_vm_options_property();
+
   // Update VM info property - called after argument parsing
   static void update_vm_info_property(const char* vm_info) {
     _vm_info->set_value(vm_info);

src/hotspot/share/runtime/globals.hpp

@@ -1051,7 +1051,7 @@ const intx ObjectAlignmentInBytes = 8;
   product(bool, PrintVMOptions, false,                                      \
           "Print flags that appeared on the command line")                  \
                                                                             \
-  product(bool, IgnoreUnrecognizedVMOptions, false,                         \
+  product(bool, IgnoreUnrecognizedVMOptions, true,                          \
           "Ignore unrecognized VM options")                                 \
                                                                             \
   product(bool, PrintCommandLineFlags, false,                               \

src/hotspot/share/runtime/thread.cpp

@@ -2748,6 +2748,10 @@ jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) {
   jint parse_result = Arguments::parse(args);
   if (parse_result != JNI_OK) return parse_result;
 
+  // Store all unrecognized vm options to system property
+  // to make it accessible from Java
+  Arguments::set_unrecognized_vm_options_property();
+
   os::init_before_ergo();
 
   jint ergo_result = Arguments::apply_ergo();

src/java.base/macosx/native/libjava/java_props_macosx.c

@@ -234,6 +234,7 @@ void setOSNameAndVersion(java_props_t *sprops) {
     // Hardcode os_name, and fill in os_version
     sprops->os_name = strdup("Mac OS X");
 
+    NSString *nsVerStr = NULL;
     char* osVersionCStr = NULL;
     // Mac OS 10.9 includes the [NSProcessInfo operatingSystemVersion] function,
     // but it's not in the 10.9 SDK.  So, call it via NSInvocation.
@@ -246,7 +247,6 @@ void setOSNameAndVersion(java_props_t *sprops) {
         [invoke invokeWithTarget:[NSProcessInfo processInfo]];
         [invoke getReturnValue:&osVer];
 
-        NSString *nsVerStr;
         // Copy out the char* if running on version other than 10.16 Mac OS (10.16 == 11.x)
         // or explicitly requesting version compatibility
         if (!((long)osVer.majorVersion == 10 && (long)osVer.minorVersion >= 16) ||
@@ -258,36 +258,30 @@ void setOSNameAndVersion(java_props_t *sprops) {
                 nsVerStr = [NSString stringWithFormat:@"%ld.%ld.%ld",
                         (long)osVer.majorVersion, (long)osVer.minorVersion, (long)osVer.patchVersion];
             }
-            // Copy out the char*
-            osVersionCStr = strdup([nsVerStr UTF8String]);
         } else {
             // Version 10.16, without explicit env setting of SYSTEM_VERSION_COMPAT
-            // AKA 11.x; compute the version number from the letter in the ProductBuildVersion
+            // AKA 11+ Read the *real* ProductVersion from the hidden link to avoid SYSTEM_VERSION_COMPAT
+            // If not found, fallback below to the SystemVersion.plist
             NSDictionary *version = [NSDictionary dictionaryWithContentsOfFile :
-                             @"/System/Library/CoreServices/SystemVersion.plist"];
+                             @"/System/Library/CoreServices/.SystemVersionPlatform.plist"];
             if (version != NULL) {
-                NSString *nsBuildVerStr = [version objectForKey : @"ProductBuildVersion"];
-                if (nsBuildVerStr != NULL && nsBuildVerStr.length >= 3) {
-                    int letter = [nsBuildVerStr characterAtIndex:2];
-                    if (letter >= 'B' && letter <= 'Z') {
-                        int vers = letter - 'A' - 1;
-                        asprintf(&osVersionCStr, "11.%d", vers);
-                    }
-                }
+                nsVerStr = [version objectForKey : @"ProductVersion"];
             }
         }
     }
     // Fallback if running on pre-10.9 Mac OS
-    if (osVersionCStr == NULL) {
+    if (nsVerStr == NULL) {
         NSDictionary *version = [NSDictionary dictionaryWithContentsOfFile :
                                  @"/System/Library/CoreServices/SystemVersion.plist"];
         if (version != NULL) {
-            NSString *nsVerStr = [version objectForKey : @"ProductVersion"];
-            if (nsVerStr != NULL) {
-                osVersionCStr = strdup([nsVerStr UTF8String]);
-            }
+            nsVerStr = [version objectForKey : @"ProductVersion"];
         }
     }
+
+    if (nsVerStr != NULL) {
+        // Copy out the char*
+        osVersionCStr = strdup([nsVerStr UTF8String]);
+    }
     if (osVersionCStr == NULL) {
         osVersionCStr = strdup("Unknown");
     }

src/java.base/share/classes/com/jetbrains/base/JBRApiModule.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.base;
+
+import com.jetbrains.internal.JBRApi;
+
+import java.lang.invoke.MethodHandles;
+
+/**
+ * This class contains mapping between JBR API interfaces and implementation in {@code java.base} module.
+ */
+public class JBRApiModule {
+    static {
+        JBRApi.registerModule(MethodHandles.lookup(), JBRApiModule.class.getModule()::addExports)
+                .service("com.jetbrains.JBR$ServiceApi", null)
+                    .withStatic("getService", "com.jetbrains.internal.JBRApi");
+    }
+}

src/java.base/share/classes/com/jetbrains/bootstrap/JBRApiBootstrap.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.bootstrap;
+
+import com.jetbrains.internal.JBRApi;
+import jdk.internal.loader.ClassLoaders;
+
+import java.lang.invoke.MethodHandles;
+
+/**
+ * Bootstrap class, used to initialize {@linkplain JBRApi JBR API}.
+ */
+public class JBRApiBootstrap {
+    private JBRApiBootstrap() {}
+
+    /**
+     * Classes that register JBR API implementation for their modules.
+     */
+    private static final String[] MODULES = {
+            "com.jetbrains.base.JBRApiModule",
+            "com.jetbrains.desktop.JBRApiModule"
+    };
+
+    /**
+     * Called from static initializer of {@link com.jetbrains.JBR}.
+     * @param outerLookup lookup context inside {@code jetbrains.api} module
+     * @return implementation for {@link com.jetbrains.JBR.ServiceApi} interface
+     */
+    public static synchronized Object bootstrap(MethodHandles.Lookup outerLookup) {
+        if (!System.getProperty("jetbrains.api.enabled", "true").equalsIgnoreCase("true")) return null;
+        try {
+            Class<?> apiInterface = outerLookup.findClass("com.jetbrains.JBR$ServiceApi");
+            if (!outerLookup.hasFullPrivilegeAccess() ||
+                    outerLookup.lookupClass().getPackage() != apiInterface.getPackage()) {
+                throw new IllegalArgumentException("Lookup must be full-privileged from the com.jetbrains package: " +
+                        outerLookup.lookupClass().getName());
+            }
+            JBRApi.init(outerLookup);
+            ClassLoader classLoader = ClassLoaders.platformClassLoader();
+            for (String m : MODULES) Class.forName(m, true, classLoader);
+            return JBRApi.getService(apiInterface);
+        } catch(ClassNotFoundException | IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}

src/java.base/share/classes/com/jetbrains/internal/ASMUtils.java

@@ -0,0 +1,132 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.internal;
+
+import jdk.internal.org.objectweb.asm.ClassVisitor;
+import jdk.internal.org.objectweb.asm.MethodVisitor;
+import jdk.internal.org.objectweb.asm.Type;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+
+import static jdk.internal.org.objectweb.asm.Opcodes.*;
+
+/**
+ * Utility class that helps with bytecode generation
+ */
+class ASMUtils {
+
+    private static final MethodHandle genericSignatureGetter;
+    static {
+        try {
+            genericSignatureGetter = MethodHandles.privateLookupIn(Method.class, MethodHandles.lookup())
+                    .findVirtual(Method.class, "getGenericSignature", MethodType.methodType(String.class));
+        } catch (NoSuchMethodException | IllegalAccessException e) {
+            throw new Error(e);
+        }
+    }
+
+    /**
+     * Replaced with {@code VM.classFileVersion()} in more recent JDK
+     * @see java.lang.invoke.InnerClassLambdaMetafactory#CLASSFILE_VERSION
+     */
+    public static final int CLASSFILE_VERSION = 59;
+
+    public static void generateUnsupportedMethod(ClassVisitor writer, Method interfaceMethod) {
+        InternalMethodInfo methodInfo = getInternalMethodInfo(interfaceMethod);
+        MethodVisitor p = writer.visitMethod(ACC_PUBLIC | ACC_FINAL, methodInfo.name(),
+                methodInfo.descriptor(), methodInfo.genericSignature(), methodInfo.exceptionNames());
+        p.visitTypeInsn(NEW, "java/lang/UnsupportedOperationException");
+        p.visitInsn(DUP);
+        p.visitLdcInsn("No implementation found for this method");
+        p.visitMethodInsn(INVOKESPECIAL, "java/lang/UnsupportedOperationException", "<init>", "(Ljava/lang/String;)V", false);
+        p.visitInsn(ATHROW);
+        p.visitMaxs(-1, -1);
+    }
+
+    public static void logDeprecated(MethodVisitor writer, String message) {
+        writer.visitTypeInsn(NEW, "java/lang/Exception");
+        writer.visitInsn(DUP);
+        writer.visitLdcInsn(message);
+        writer.visitMethodInsn(INVOKESPECIAL, "java/lang/Exception", "<init>", "(Ljava/lang/String;)V", false);
+        writer.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Exception", "printStackTrace", "()V", false);
+    }
+
+    protected record InternalMethodInfo(String name, String descriptor, String genericSignature,
+                                        String[] exceptionNames) {}
+
+    public static InternalMethodInfo getInternalMethodInfo(Method method) {
+        try {
+            return new InternalMethodInfo(
+                    method.getName(),
+                    Type.getMethodDescriptor(method),
+                    (String) genericSignatureGetter.invoke(method),
+                    getExceptionNames(method));
+        } catch (Throwable e) {
+            throw new Error(e);
+        }
+    }
+
+    private static String[] getExceptionNames(Method method) {
+        Class<?>[] exceptionTypes = method.getExceptionTypes();
+        String[] exceptionNames = new String[exceptionTypes.length];
+        for (int i = 0; i < exceptionTypes.length; i++) {
+            exceptionNames[i] = Type.getInternalName(exceptionTypes[i]);
+        }
+        return exceptionNames;
+    }
+
+    public static int getParameterSize(Class<?> c) {
+        if (c == Void.TYPE) {
+            return 0;
+        } else if (c == Long.TYPE || c == Double.TYPE) {
+            return 2;
+        }
+        return 1;
+    }
+
+    public static int getLoadOpcode(Class<?> c) {
+        if (c == Void.TYPE) {
+            throw new InternalError("Unexpected void type of load opcode");
+        }
+        return ILOAD + getOpcodeOffset(c);
+    }
+
+    public static int getReturnOpcode(Class<?> c) {
+        if (c == Void.TYPE) {
+            return RETURN;
+        }
+        return IRETURN + getOpcodeOffset(c);
+    }
+
+    public static int getOpcodeOffset(Class<?> c) {
+        if (c.isPrimitive()) {
+            if (c == Long.TYPE) {
+                return 1;
+            } else if (c == Float.TYPE) {
+                return 2;
+            } else if (c == Double.TYPE) {
+                return 3;
+            }
+            return 0;
+        } else {
+            return 4;
+        }
+    }
+}

src/java.base/share/classes/com/jetbrains/internal/JBRApi.java

@@ -0,0 +1,280 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.internal;
+
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.function.BiFunction;
+
+import static java.lang.invoke.MethodHandles.Lookup;
+
+/**
+ * JBR API is a collection of JBR-specific features that are accessed by client though
+ * {@link com.jetbrains.JBR jetbrains.api} module. Actual implementation is linked by
+ * JBR at runtime by generating {@linkplain Proxy proxy objects}.
+ * Mapping between interfaces and implementation code is defined in
+ * {@linkplain com.jetbrains.bootstrap.JBRApiBootstrap#MODULES registry classes}.
+ * <p>
+ * This class has most basic methods for working with JBR API and cache of generated proxies.
+ * <p>
+ * <h2>How to add a new service</h2>
+ * <ol>
+ *     <li>Create your service interface in module {@link com.jetbrains.JBR jetbrains.api}:
+ *         <blockquote><pre>{@code
+ *         package com.jetbrains;
+ *
+ *         interface StringOptimizer {
+ *             void optimize(String string);
+ *         }
+ *         }</pre></blockquote>
+ *     </li>
+ *     <li>Create an implementation inside JBR:
+ *         <blockquote><pre>{@link java.lang.String java.lang.String}:{@code
+ *         private static void optimizeInternal(String string) {
+ *             string.hash = 0;
+ *             string.hashIsZero = true;
+ *         }
+ *         }</pre></blockquote>
+ *     </li>
+ *     <li>Register your service in corresponding
+ *     {@linkplain com.jetbrains.bootstrap.JBRApiBootstrap#MODULES module registry class}:
+ *         <blockquote><pre>{@link com.jetbrains.base.JBRApiModule}:{@code
+ *         .service("com.jetbrains.StringOptimizer", null)
+ *             .withStatic("optimize", "java.lang.String", "optimizeInternal")
+ *         }</pre></blockquote>
+ *     </li>
+ *     <li>You can also bind the interface to implementation class
+ *     (without actually implementing the interface):
+ *         <blockquote><pre>{@link java.lang.String java.lang.String}:{@code
+ *         private static class StringOptimizerImpl {
+ *
+ *             private void optimize(String string) {
+ *                 string.hash = 0;
+ *                 string.hashIsZero = true;
+ *             }
+ *         }
+ *         }</pre></blockquote>
+ *         <blockquote><pre>{@link com.jetbrains.base.JBRApiModule}:{@code
+ *         .service("com.jetbrains.StringOptimizer", "java.lang.String$StringOptimizerImpl")
+ *         }</pre></blockquote>
+ *     </li>
+ * </ol>
+ * <h2>How to add a new proxy</h2>
+ * Registering a proxy is similar to registering a service:
+ * <blockquote><pre>{@code
+ * .proxy("com.jetbrains.SomeProxy", "a.b.c.SomeProxyImpl")
+ * }</pre></blockquote>
+ * Note that unlike service, proxy <b>must</b> have a target type.
+ * Also, proxy expects target object as a single constructor argument
+ * and can only be instantiated by JBR, there's no API that would allow
+ * user to directly create proxy object.
+ */
+public class JBRApi {
+
+    private static final Map<String, RegisteredProxyInfo> registeredProxyInfoByInterfaceName = new HashMap<>();
+    private static final Map<String, RegisteredProxyInfo> registeredProxyInfoByTargetName = new HashMap<>();
+    private static final ConcurrentMap<Class<?>, Proxy<?>> proxyByInterface = new ConcurrentHashMap<>();
+
+    /**
+     * lookup context inside {@code jetbrains.api} module
+     */
+    static Lookup outerLookup;
+    /**
+     * Known service and proxy interfaces extracted from {@link com.jetbrains.JBR.Metadata}
+     */
+    static Set<String> knownServices, knownProxies;
+
+    public static void init(Lookup outerLookup) {
+        JBRApi.outerLookup = outerLookup;
+        try {
+            Class<?> metadataClass = outerLookup.findClass("com.jetbrains.JBR$Metadata");
+            knownServices = Set.of((String[]) outerLookup.findStaticVarHandle(metadataClass,
+                    "KNOWN_SERVICES", String[].class).get());
+            knownProxies = Set.of((String[]) outerLookup.findStaticVarHandle(metadataClass,
+                    "KNOWN_PROXIES", String[].class).get());
+        } catch (ClassNotFoundException | NoSuchFieldException | IllegalAccessException e) {
+            e.printStackTrace();
+            knownServices = Set.of();
+            knownProxies = Set.of();
+        }
+    }
+
+    /**
+     * @return fully supported service implementation for the given interface, or null
+     * @apiNote this method is a part of internal {@link com.jetbrains.JBR.ServiceApi}
+     * service, but is not directly exposed to user.
+     */
+    public static <T> T getService(Class<T> interFace) {
+        Proxy<T> p = getProxy(interFace);
+        return p != null && p.isSupported() ? p.getInstance() : null;
+    }
+
+    /**
+     * @return proxy for the given interface, or {@code null}
+     */
+    @SuppressWarnings("unchecked")
+    static <T> Proxy<T> getProxy(Class<T> interFace) {
+        return (Proxy<T>) proxyByInterface.computeIfAbsent(interFace, i -> {
+            RegisteredProxyInfo info = registeredProxyInfoByInterfaceName.get(i.getName());
+            if (info == null) return null;
+            ProxyInfo resolved = ProxyInfo.resolve(info);
+            return resolved != null ? new Proxy<>(resolved) : null;
+        });
+    }
+
+    /**
+     * @return true if given class represents a proxy interface. Even if {@code jetbrains.api}
+     * introduces new interfaces JBR is not aware of, these interfaces would still be detected
+     * by this method.
+     */
+    static boolean isKnownProxyInterface(Class<?> clazz) {
+        String name = clazz.getName();
+        return registeredProxyInfoByInterfaceName.containsKey(name) ||
+                knownServices.contains(name) || knownProxies.contains(name);
+    }
+
+    /**
+     * Reverse lookup by proxy target type name.
+     * @return user-side interface for given implementation target type name.
+     */
+    static Class<?> getProxyInterfaceByTargetName(String targetName) {
+        RegisteredProxyInfo info = registeredProxyInfoByTargetName.get(targetName);
+        if (info == null) return null;
+        try {
+            return (info.type() == ProxyInfo.Type.CLIENT_PROXY ? info.apiModule() : outerLookup)
+                    .findClass(info.interfaceName());
+        } catch (ClassNotFoundException | IllegalAccessException e) {
+            return null;
+        }
+    }
+
+    /**
+     * Called by {@linkplain com.jetbrains.bootstrap.JBRApiBootstrap#MODULES registry classes}
+     * to register a new mapping for corresponding modules.
+     */
+    public static ModuleRegistry registerModule(Lookup lookup, BiFunction<String, Module, Module> addExports) {
+        addExports.apply(lookup.lookupClass().getPackageName(), outerLookup.lookupClass().getModule());
+        return new ModuleRegistry(lookup);
+    }
+
+    public static class ModuleRegistry {
+
+        private final Lookup lookup;
+        private RegisteredProxyInfo lastProxy;
+
+        private ModuleRegistry(Lookup lookup) {
+            this.lookup = lookup;
+        }
+
+        private ModuleRegistry addProxy(String interfaceName, String target, ProxyInfo.Type type) {
+            lastProxy = new RegisteredProxyInfo(lookup, interfaceName, target, type, new ArrayList<>());
+            registeredProxyInfoByInterfaceName.put(interfaceName, lastProxy);
+            if (target != null) {
+                registeredProxyInfoByTargetName.put(target, lastProxy);
+                validate2WayMapping(lastProxy, registeredProxyInfoByInterfaceName.get(target));
+                validate2WayMapping(lastProxy, registeredProxyInfoByTargetName.get(interfaceName));
+            }
+            return this;
+        }
+        private static void validate2WayMapping(RegisteredProxyInfo p, RegisteredProxyInfo reverse) {
+            if (reverse != null &&
+                    (!p.interfaceName().equals(reverse.target()) || !p.target().equals(reverse.interfaceName()))) {
+                throw new IllegalArgumentException("Invalid 2-way proxy mapping: " +
+                        p.interfaceName() + " -> " + p.target() + " & " +
+                        reverse.interfaceName() + " -> " + reverse.target());
+            }
+        }
+
+        /**
+         * Register new {@linkplain ProxyInfo.Type#PROXY proxy} mapping.
+         * <p>
+         * When {@code target} object is passed from JBR to client through service or any other proxy,
+         * it's converted to corresponding {@code interFace} type by creating a proxy object
+         * that implements {@code interFace} and delegates method calls to {@code target}.
+         * @param interFace interface name in {@link com.jetbrains.JBR jetbrains.api} module.
+         * @param target corresponding class/interface name in current JBR module.
+         * @apiNote class name example: {@code pac.ka.ge.Outer$Inner}
+         */
+        public ModuleRegistry proxy(String interFace, String target) {
+            Objects.requireNonNull(target);
+            return addProxy(interFace, target, ProxyInfo.Type.PROXY);
+        }
+
+        /**
+         * Register new {@linkplain ProxyInfo.Type#SERVICE service} mapping.
+         * <p>
+         * Service is a singleton, which may be accessed by client using {@link com.jetbrains.JBR} class.
+         * @param interFace interface name in {@link com.jetbrains.JBR jetbrains.api} module.
+         * @param target corresponding implementation class name in current JBR module, or null.
+         * @apiNote class name example: {@code pac.ka.ge.Outer$Inner}
+         */
+        public ModuleRegistry service(String interFace, String target) {
+            return addProxy(interFace, target, ProxyInfo.Type.SERVICE);
+        }
+
+        /**
+         * Register new {@linkplain ProxyInfo.Type#CLIENT_PROXY client proxy} mapping.
+         * This mapping type allows implementation of callbacks.
+         * <p>
+         * When {@code target} object is passed from client to JBR through service or any other proxy,
+         * it's converted to corresponding {@code interFace} type by creating a proxy object
+         * that implements {@code interFace} and delegates method calls to {@code target}.
+         * @param interFace interface name in current JBR module.
+         * @param target corresponding class/interface name in {@link com.jetbrains.JBR jetbrains.api} module.
+         * @apiNote class name example: {@code pac.ka.ge.Outer$Inner}
+         */
+        public ModuleRegistry clientProxy(String interFace, String target) {
+            Objects.requireNonNull(target);
+            return addProxy(interFace, target, ProxyInfo.Type.CLIENT_PROXY);
+        }
+
+        /**
+         * Register new 2-way mapping.
+         * It creates both {@linkplain ProxyInfo.Type#PROXY proxy} and
+         * {@linkplain ProxyInfo.Type#CLIENT_PROXY client proxy} between given interfaces.
+         * <p>
+         * It links together two given interfaces and allows passing such objects back and forth
+         * between JBR and {@link com.jetbrains.JBR jetbrains.api} module through services and other proxy methods.
+         * @param apiInterface interface name in {@link com.jetbrains.JBR jetbrains.api} module.
+         * @param jbrInterface interface name in current JBR module.
+         * @apiNote class name example: {@code pac.ka.ge.Outer$Inner}
+         */
+        public ModuleRegistry twoWayProxy(String apiInterface, String jbrInterface) {
+            clientProxy(jbrInterface, apiInterface);
+            proxy(apiInterface, jbrInterface);
+            return this;
+        }
+
+        /**
+         * Delegate interface "{@code methodName}" calls to static "{@code methodName}" in "{@code clazz}".
+         * @see #withStatic(String, String, String)
+         */
+        public ModuleRegistry withStatic(String methodName, String clazz) {
+            return withStatic(methodName, clazz, methodName);
+        }
+
+        /**
+         * Delegate "{@code interfaceMethodName}" method calls to static "{@code methodName}" in "{@code clazz}".
+         */
+        public ModuleRegistry withStatic(String interfaceMethodName, String clazz, String methodName) {
+            lastProxy.staticMethods().add(
+                    new RegisteredProxyInfo.StaticMethodMapping(interfaceMethodName, clazz, methodName));
+            return this;
+        }
+    }
+}

src/java.base/share/classes/com/jetbrains/internal/Proxy.java

@@ -0,0 +1,211 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.internal;
+
+import java.lang.invoke.MethodHandle;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * Proxy is needed to dynamically link JBR API interfaces and implementation at runtime.
+ * It implements user-side interfaces and delegates method calls to actual implementation
+ * code through {@linkplain java.lang.invoke.MethodHandle method handles}.
+ * <p>
+ * There are 3 type of proxy objects:
+ * <ol>
+ *     <li>{@linkplain ProxyInfo.Type#PROXY Proxy} - implements client-side interface from
+ *        {@code jetbrains.api} and delegates calls to JBR-side target object and optionally static methods.</li>
+ *     <li>{@linkplain ProxyInfo.Type#SERVICE Service} - singleton {@linkplain ProxyInfo.Type#PROXY proxy},
+ *        may delegate calls only to static methods, without target object.</li>
+ *     <li>{@linkplain ProxyInfo.Type#CLIENT_PROXY Client proxy} - reverse proxy, implements JBR-side interface
+ *        and delegates calls to client-side target object by interface defined in {@code jetbrains.api}.
+ *        May be used to implement callbacks which are created by client and called by JBR.</li>
+ * </ol>
+ * <p>
+ * Method signatures of proxy interfaces and implementation are validated to ensure that proxy can
+ * properly delegate call to the target implementation code. If there's no implementation found for some
+ * interface methods, corresponding proxy is considered unsupported. Proxy is also considered unsupported
+ * if any proxy used by it is unsupported, more about it at {@link ProxyDependencyManager}.
+ * <p>
+ * Mapping between interfaces and implementation code is defined in
+ * {@linkplain com.jetbrains.bootstrap.JBRApiBootstrap#MODULES registry classes}.
+ * @param <INTERFACE> interface type for this proxy.
+ */
+class Proxy<INTERFACE> {
+    private final ProxyInfo info;
+
+    private volatile ProxyGenerator generator;
+    private volatile Boolean allMethodsImplemented;
+
+    private volatile Boolean supported;
+
+    private volatile Class<?> proxyClass;
+    private volatile MethodHandle constructor;
+    private volatile MethodHandle targetExtractor;
+
+    private volatile INTERFACE instance;
+
+    Proxy(ProxyInfo info) {
+        this.info = info;
+    }
+
+    /**
+     * @return {@link ProxyInfo} structure of this proxy
+     */
+    ProxyInfo getInfo() {
+        return info;
+    }
+
+    private synchronized void initGenerator() {
+        if (generator != null) return;
+        generator = new ProxyGenerator(info);
+        allMethodsImplemented = generator.areAllMethodsImplemented();
+    }
+
+    /**
+     * Checks if implementation is found for all abstract interface methods of this proxy.
+     */
+    boolean areAllMethodsImplemented() {
+        if (allMethodsImplemented != null) return allMethodsImplemented;
+        synchronized (this) {
+            if (allMethodsImplemented == null) initGenerator();
+            return allMethodsImplemented;
+        }
+    }
+
+    /**
+     * Checks if all methods are {@linkplain #areAllMethodsImplemented() implemented}
+     * for this proxy and all proxies it {@linkplain ProxyDependencyManager uses}.
+     */
+    boolean isSupported() {
+        if (supported != null) return supported;
+        synchronized (this) {
+            if (supported == null) {
+                Set<Class<?>> dependencies = ProxyDependencyManager.getProxyDependencies(info.interFace);
+                for (Class<?> d : dependencies) {
+                    Proxy<?> p = JBRApi.getProxy(d);
+                    if (p == null || !p.areAllMethodsImplemented()) {
+                        supported = false;
+                        return false;
+                    }
+                }
+                supported = true;
+            }
+            return supported;
+        }
+    }
+
+    private synchronized void defineClasses() {
+        if (constructor != null) return;
+        initGenerator();
+        generator.defineClasses();
+        proxyClass = generator.getProxyClass();
+        constructor = generator.findConstructor();
+        targetExtractor = generator.findTargetExtractor();
+    }
+
+    /**
+     * @return generated proxy class
+     */
+    Class<?> getProxyClass() {
+        if (proxyClass != null) return proxyClass;
+        synchronized (this) {
+            if (proxyClass == null) defineClasses();
+            return proxyClass;
+        }
+    }
+
+    /**
+     * @return method handle for the constructor of this proxy.
+     * <ul>
+     *     <li>For {@linkplain ProxyInfo.Type#SERVICE services}, constructor is no-arg.</li>
+     *     <li>For non-{@linkplain ProxyInfo.Type#SERVICE services}, constructor is single-arg,
+     *     expecting target object to which it would delegate method calls.</li>
+     * </ul>
+     */
+    MethodHandle getConstructor() {
+        if (constructor != null) return constructor;
+        synchronized (this) {
+            if (constructor == null) defineClasses();
+            return constructor;
+        }
+    }
+
+    /**
+     * @return method handle for that extracts target object of the proxy, or null.
+     */
+    MethodHandle getTargetExtractor() {
+        // targetExtractor may be null, so check constructor instead
+        if (constructor != null) return targetExtractor;
+        synchronized (this) {
+            if (constructor == null) defineClasses();
+            return targetExtractor;
+        }
+    }
+
+    private synchronized void initClass(Set<Proxy<?>> actualUsages) {
+        defineClasses();
+        if (generator != null) {
+            actualUsages.addAll(generator.getDirectProxyDependencies());
+            generator.init();
+            generator = null;
+        }
+    }
+    private synchronized void initDependencyGraph() {
+        defineClasses();
+        if (generator == null) return;
+        Set<Class<?>> dependencyClasses = ProxyDependencyManager.getProxyDependencies(info.interFace);
+        Set<Proxy<?>> dependencies = new HashSet<>();
+        Set<Proxy<?>> actualUsages = new HashSet<>();
+        for (Class<?> d : dependencyClasses) {
+            Proxy<?> p = JBRApi.getProxy(d);
+            if (p != null) {
+                dependencies.add(p);
+                p.initClass(actualUsages);
+            }
+        }
+        actualUsages.removeAll(dependencies);
+        if (!actualUsages.isEmpty()) {
+            // Should never happen, this is a sign of broken dependency search
+            throw new RuntimeException("Some proxies are not in dependencies of " + info.interFace.getName() +
+                    ", but are actually used by it: " +
+                    actualUsages.stream().map(p -> p.info.interFace.getName()).collect(Collectors.joining(", ")));
+        }
+    }
+
+    /**
+     * @return instance for this {@linkplain ProxyInfo.Type#SERVICE service},
+     * returns {@code null} for other proxy types.
+     */
+    @SuppressWarnings("unchecked")
+    INTERFACE getInstance() {
+        if (instance != null) return instance;
+        if (info.type != ProxyInfo.Type.SERVICE) return null;
+        synchronized (this) {
+            if (instance == null) {
+                initDependencyGraph();
+                try {
+                    instance = (INTERFACE) getConstructor().invoke();
+                } catch (Throwable e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            return instance;
+        }
+    }
+}

src/java.base/share/classes/com/jetbrains/internal/ProxyDependencyManager.java

@@ -0,0 +1,198 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.internal;
+
+import java.lang.reflect.*;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.function.Consumer;
+
+/**
+ * This class collects {@linkplain Proxy proxy} dependencies.
+ * <p>
+ * Dependencies of a class {@code C} are other classes that are
+ * used by {@code C} (i.e. supertypes, classes that appear in method
+ * parameters, return types) and all their dependencies. Any class
+ * is also considered a dependency of itself.
+ * <p>
+ * Dependencies allow JBR to validate whole set of interfaces for
+ * a particular feature instead of treating them as separate entities.
+ * <h2>Example</h2>
+ * Suppose we implemented some feature and added some API for it:
+ * <blockquote><pre>{@code
+ * interface SomeFeature {
+ *     SomeOtherObject createSomeObject(int magicNumber);
+ * }
+ * interface SomeOtherObject {
+ *     int getMagicNumber();
+ * }
+ * }</pre></blockquote>
+ * And then used it:
+ * <blockquote><pre>{@code
+ * if (JBR.isSomeFeatureSupported()) {
+ *     SomeOtherObject object = JBR.getSomeFeature().createSomeObject(123);
+ *     int magic = object.getMagicNumber();
+ * }
+ * }</pre></blockquote>
+ * Suppose JBR was able to find implementation for {@code SomeFeature.createSomeObject()},
+ * but not for {@code SomeOtherObject.getMagicNumber()}. So {@code JBR.getSomeFeature()}
+ * would succeed and return service instance, but {@code createSomeObject()} would fail,
+ * because JBR wasn't able to find implementation for {@code SomeOtherObject.getMagicNumber()}
+ * and therefore couldn't create proxy for {@code SomeOtherObject} class.
+ * <p>
+ * To avoid such issues, not only proxy interface itself, but all proxies that are accessible
+ * from current proxy interface must have proper implementation.
+ */
+class ProxyDependencyManager {
+
+    private static final ConcurrentMap<Class<?>, Set<Class<?>>> cache = new ConcurrentHashMap<>();
+
+    /**
+     * @return all proxy interfaces that are used (directly or indirectly) by given interface, including itself.
+     */
+    static Set<Class<?>> getProxyDependencies(Class<?> interFace) {
+        Set<Class<?>> dependencies = cache.get(interFace);
+        if (dependencies != null) return dependencies;
+        step(null, interFace);
+        return cache.get(interFace);
+    }
+
+    /**
+     * Collect dependencies for given class and store them into cache.
+     */
+    private static void step(Node parent, Class<?> clazz) {
+        if (!clazz.getPackageName().startsWith("com.jetbrains")) return;
+        if (parent != null && parent.findAndMergeCycle(clazz) != null) {
+            return;
+        }
+        Set<Class<?>> cachedDependencies = cache.get(clazz);
+        if (cachedDependencies != null) {
+            if (parent != null) parent.cycle.dependencies.addAll(cachedDependencies);
+            return;
+        }
+        Node node = new Node(parent, clazz);
+        ClassUsagesFinder.visitUsages(clazz, c -> step(node, c));
+        Class<?> correspondingProxyInterface = JBRApi.getProxyInterfaceByTargetName(clazz.getName());
+        if (correspondingProxyInterface != null) {
+            step(node, correspondingProxyInterface);
+        }
+        if (parent != null && parent.cycle != node.cycle) {
+            parent.cycle.dependencies.addAll(node.cycle.dependencies);
+        }
+        if (node.cycle.origin.equals(clazz)) {
+            // Put collected dependencies into cache only when we exit from the cycle
+            // Otherwise cache will contain incomplete data
+            for (Class<?> c : node.cycle.members) {
+                cache.put(c, node.cycle.dependencies);
+            }
+        }
+    }
+
+    /**
+     * Graph node, one per visited class
+     */
+    private static class Node {
+        private final Node parent;
+        private final Class<?> clazz;
+        private Cycle cycle;
+
+        private Node(Node parent, Class<?> clazz) {
+            this.parent = parent;
+            this.clazz = clazz;
+            cycle = new Cycle(clazz);
+        }
+
+        /**
+         * When classes form dependency cycle, they share all their dependencies.
+         * If cycle was found, merge all found dependencies for nodes that form the cycle.
+         */
+        private Cycle findAndMergeCycle(Class<?> clazz) {
+            if (this.clazz.equals(clazz)) return cycle;
+            if (parent == null) return null;
+            Cycle c = parent.findAndMergeCycle(clazz);
+            if (c != null && c != cycle) {
+                c.members.addAll(cycle.members);
+                c.dependencies.addAll(cycle.dependencies);
+                cycle = c;
+            }
+            return c;
+        }
+    }
+
+    /**
+     * Cycle info. For the sake of elegant code, single node
+     * also forms a cycle with itself as a single member and dependency.
+     */
+    private static class Cycle {
+        /**
+         * Origin is the first visited class from that cycle.
+         */
+        private final Class<?> origin;
+        private final Set<Class<?>> members = new HashSet<>();
+        private final Set<Class<?>> dependencies = new HashSet<>();
+
+        private Cycle(Class<?> origin) {
+            this.origin = origin;
+            members.add(origin);
+            if (JBRApi.isKnownProxyInterface(origin)) {
+                dependencies.add(origin);
+            }
+        }
+    }
+
+    /**
+     * Utility class that collects direct class usages using reflection
+     */
+    private static class ClassUsagesFinder {
+
+        private static void visitUsages(Class<?> c, Consumer<Class<?>> action) {
+            collect(c.getGenericSuperclass(), action);
+            for (java.lang.reflect.Type t : c.getGenericInterfaces()) collect(t, action);
+            for (Field f : c.getDeclaredFields()) collect(f.getGenericType(), action);
+            for (Method m : c.getDeclaredMethods()) {
+                collect(m.getGenericParameterTypes(), action);
+                collect(m.getGenericReturnType(), action);
+                collect(m.getGenericExceptionTypes(), action);
+            }
+        }
+
+        private static void collect(java.lang.reflect.Type type, Consumer<Class<?>> action) {
+            if (type instanceof Class<?> c) {
+                while (c.isArray()) c = Objects.requireNonNull(c.getComponentType());
+                if (!c.isPrimitive()) action.accept(c);
+            } else if (type instanceof TypeVariable<?> v) {
+                collect(v.getBounds(), action);
+            } else if (type instanceof WildcardType w) {
+                collect(w.getUpperBounds(), action);
+                collect(w.getLowerBounds(), action);
+            } else if (type instanceof ParameterizedType p) {
+                collect(p.getActualTypeArguments(), action);
+                collect(p.getRawType(), action);
+                collect(p.getOwnerType(), action);
+            } else if (type instanceof GenericArrayType a) {
+                collect(a.getGenericComponentType(), action);
+            }
+        }
+
+        private static void collect(java.lang.reflect.Type[] types, Consumer<Class<?>> action) {
+            for (java.lang.reflect.Type t : types) collect(t, action);
+        }
+    }
+}

src/java.base/share/classes/com/jetbrains/internal/ProxyGenerator.java

@@ -0,0 +1,460 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.internal;
+
+import jdk.internal.org.objectweb.asm.*;
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Supplier;
+
+import static com.jetbrains.internal.ASMUtils.*;
+import static java.lang.invoke.MethodHandles.Lookup;
+import static jdk.internal.org.objectweb.asm.Opcodes.*;
+
+/**
+ * This class generates {@linkplain Proxy proxy} classes.
+ * Each proxy is just a generated class implementing some interface and
+ * delegating method calls to method handles.
+ * <p>
+ * There are 2 proxy dispatch modes:
+ * <ul>
+ *     <li>interface -> proxy -> {@linkplain #generateBridge bridge} -> method handle -> implementation code</li>
+ *     <li>interface -> proxy -> method handle -> implementation code</li>
+ * </ul>
+ * Generated proxy is always located in the same package with its interface and optional bridge is located in the
+ * same module with target implementation code. Bridge allows proxy to safely call hidden non-static implementation
+ * methods and is only needed for {@code jetbrains.api} -> JBR calls. For JBR -> {@code jetbrains.api} calls, proxy can
+ * invoke method handle directly.
+ */
+class ProxyGenerator {
+    private static final String OBJECT_DESCRIPTOR = "Ljava/lang/Object;";
+    private static final String MH_NAME = "java/lang/invoke/MethodHandle";
+    private static final String MH_DESCRIPTOR = "Ljava/lang/invoke/MethodHandle;";
+    private static final String CONVERSION_DESCRIPTOR = "(Ljava/lang/Object;)Ljava/lang/Object;";
+    /**
+     * Print warnings about usage of deprecated interfaces and methods to {@link System#err}.
+     */
+    private static final boolean LOG_DEPRECATED = System.getProperty("jetbrains.api.logDeprecated", "true").equalsIgnoreCase("true");
+
+    private static final AtomicInteger nameCounter = new AtomicInteger();
+
+    private final ProxyInfo info;
+    private final boolean generateBridge;
+    private final String proxyName, bridgeName;
+    private final ClassVisitor proxyWriter, bridgeWriter;
+    private final List<Supplier<MethodHandle>> handles = new ArrayList<>();
+    private final List<Supplier<Class<?>>> classReferences = new ArrayList<>();
+    private final Set<Proxy<?>> directProxyDependencies = new HashSet<>();
+    private final List<Exception> exceptions = new ArrayList<>();
+    private int bridgeMethodCounter;
+    private boolean allMethodsImplemented = true;
+    private Lookup generatedHandlesHolder, generatedProxy;
+
+    /**
+     * Creates new proxy generator from given {@link ProxyInfo},
+     * looks for abstract interface methods, corresponding implementation methods
+     * and generates proxy bytecode. However, it doesn't actually load generated
+     * classes until {@link #defineClasses()} is called.
+     */
+    ProxyGenerator(ProxyInfo info) {
+        this.info = info;
+        generateBridge = info.type != ProxyInfo.Type.CLIENT_PROXY;
+        int nameId = nameCounter.getAndIncrement();
+        proxyName = Type.getInternalName(info.interFace) + "$$JBRApiProxy$" + nameId;
+        bridgeName = generateBridge ? info.apiModule.lookupClass().getPackageName().replace('.', '/') + "/" +
+                info.interFace.getSimpleName() + "$$JBRApiBridge$" + nameId : null;
+
+        class ClassWriter extends jdk.internal.org.objectweb.asm.ClassWriter {
+            ClassWriter() { super(ClassWriter.COMPUTE_FRAMES); }
+            ClassVisitor createEmptyVisitor() {
+                return new ClassVisitor(api) {
+                    @Override
+                    public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+                        return new MethodVisitor(api) {};
+                    }
+                };
+            }
+        }
+        ClassWriter proxyClassWriter = new ClassWriter();
+        proxyWriter = proxyClassWriter;
+        bridgeWriter = generateBridge ? new ClassWriter() : proxyClassWriter.createEmptyVisitor();
+        proxyWriter.visit(CLASSFILE_VERSION, ACC_SUPER | ACC_FINAL | ACC_SYNTHETIC, proxyName, null,
+                "java/lang/Object", new String[] {Type.getInternalName(info.interFace)});
+        bridgeWriter.visit(CLASSFILE_VERSION, ACC_SUPER | ACC_FINAL | ACC_SYNTHETIC | ACC_PUBLIC, bridgeName, null,
+                "java/lang/Object", null);
+        generateConstructor();
+        generateMethods();
+    }
+
+    boolean areAllMethodsImplemented() {
+        return allMethodsImplemented;
+    }
+
+    Set<Proxy<?>> getDirectProxyDependencies() {
+        return directProxyDependencies;
+    }
+
+    /**
+     * Insert all method handles and class references into static fields, so that proxy can call implementation methods.
+     */
+    void init() {
+        try {
+            for (int i = 0; i < handles.size(); i++) {
+                generatedHandlesHolder
+                        .findStaticVarHandle(generatedHandlesHolder.lookupClass(), "h" + i, MethodHandle.class)
+                        .set(handles.get(i).get());
+            }
+            for (int i = 0; i < classReferences.size(); i++) {
+                generatedHandlesHolder
+                        .findStaticVarHandle(generatedHandlesHolder.lookupClass(), "c" + i, Class.class)
+                        .set(classReferences.get(i).get());
+            }
+        } catch (NoSuchFieldException | IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    Class<?> getProxyClass() {
+        return generatedProxy.lookupClass();
+    }
+
+    /**
+     * @return method handle to constructor of generated proxy class.
+     * <ul>
+     *     <li>For {@linkplain ProxyInfo.Type#SERVICE services}, constructor is no-arg.</li>
+     *     <li>For non-{@linkplain ProxyInfo.Type#SERVICE services}, constructor is single-arg,
+     *     expecting target object to which it would delegate method calls.</li>
+     * </ul>
+     */
+    MethodHandle findConstructor() {
+        try {
+            if (info.target == null) {
+                return generatedProxy.findConstructor(generatedProxy.lookupClass(), MethodType.methodType(void.class));
+            } else {
+                MethodHandle c = generatedProxy.findConstructor(generatedProxy.lookupClass(),
+                        MethodType.methodType(void.class, Object.class));
+                if (info.type == ProxyInfo.Type.SERVICE) {
+                    try {
+                        return MethodHandles.foldArguments(c, info.target.findConstructor(info.target.lookupClass(),
+                                MethodType.methodType(void.class)).asType(MethodType.methodType(Object.class)));
+                    } catch (NoSuchMethodException | IllegalAccessException e) {
+                        throw new RuntimeException("Service implementation must have no-args constructor: " +
+                                info.target.lookupClass(), e);
+                    }
+                }
+                return c;
+            }
+        } catch (IllegalAccessException | NoSuchMethodException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * @return method handle that receives proxy and returns its target, or null
+     */
+    MethodHandle findTargetExtractor() {
+        if (info.target == null) return null;
+        try {
+            return generatedProxy.findGetter(generatedProxy.lookupClass(), "target", Object.class);
+        } catch (NoSuchFieldException | IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * Loads generated classes.
+     */
+    void defineClasses() {
+        try {
+            Lookup bridge = !generateBridge ? null : MethodHandles.privateLookupIn(
+                    info.apiModule.defineClass(((ClassWriter) bridgeWriter).toByteArray()), info.apiModule);
+            generatedProxy = info.interFaceLookup.defineHiddenClass(
+                    ((ClassWriter) proxyWriter).toByteArray(), true, Lookup.ClassOption.STRONG, Lookup.ClassOption.NESTMATE);
+            generatedHandlesHolder = generateBridge ? bridge : generatedProxy;
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void generateConstructor() {
+        if (info.target != null) {
+            proxyWriter.visitField(ACC_PRIVATE | ACC_FINAL, "target", OBJECT_DESCRIPTOR, null, null);
+        }
+        MethodVisitor p = proxyWriter.visitMethod(ACC_PRIVATE, "<init>", "(" +
+                (info.target == null ? "" : OBJECT_DESCRIPTOR) + ")V", null, null);
+        if (LOG_DEPRECATED && info.interFace.isAnnotationPresent(Deprecated.class)) {
+            logDeprecated(p, "Warning: using deprecated JBR API interface " + info.interFace.getName());
+        }
+        p.visitVarInsn(ALOAD, 0);
+        if (info.target != null) {
+            p.visitInsn(DUP);
+            p.visitVarInsn(ALOAD, 1);
+            p.visitFieldInsn(PUTFIELD, proxyName, "target", OBJECT_DESCRIPTOR);
+        }
+        p.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
+        p.visitInsn(RETURN);
+        p.visitMaxs(-1, -1);
+    }
+
+    private void generateMethods() {
+        for (Method method : info.interFace.getMethods()) {
+            int mod = method.getModifiers();
+            if (!Modifier.isAbstract(mod)) continue;
+            MethodMapping methodMapping = getTargetMethodMapping(method);
+
+            Exception e1 = null;
+            if (info.target != null) {
+                try {
+                    MethodHandle handle = info.target.findVirtual(
+                            info.target.lookupClass(), method.getName(), methodMapping.type());
+                    generateMethod(method, handle, methodMapping, true);
+                    continue;
+                } catch (NoSuchMethodException | IllegalAccessException e) {
+                    e1 = e;
+                }
+            }
+
+            Exception e2 = null;
+            ProxyInfo.StaticMethodMapping mapping = info.staticMethods.get(method.getName());
+            if (mapping != null) {
+                try {
+                    MethodHandle staticHandle =
+                            mapping.lookup().findStatic(mapping.lookup().lookupClass(), mapping.methodName(), methodMapping.type());
+                    generateMethod(method, staticHandle, methodMapping, false);
+                    continue;
+                } catch (NoSuchMethodException | IllegalAccessException e) {
+                    e2 = e;
+                }
+            }
+
+            if (e1 != null) exceptions.add(e1);
+            if (e2 != null) exceptions.add(e2);
+            generateUnsupportedMethod(proxyWriter, method);
+            allMethodsImplemented = false;
+        }
+    }
+
+    private void generateMethod(Method interfaceMethod, MethodHandle handle, MethodMapping mapping, boolean passInstance) {
+        InternalMethodInfo methodInfo = getInternalMethodInfo(interfaceMethod);
+        String bridgeMethodDescriptor = mapping.getBridgeDescriptor(passInstance);
+
+        ClassVisitor handleWriter = generateBridge ? bridgeWriter : proxyWriter;
+        String bridgeOrProxyName = generateBridge ? bridgeName : proxyName;
+        String handleName = addHandle(handleWriter, () -> handle);
+        for (TypeMapping m : mapping) {
+            if (m.conversion() == TypeConversion.EXTRACT_TARGET ||
+                    m.conversion() == TypeConversion.DYNAMIC_2_WAY) {
+                Proxy<?> from = m.fromProxy();
+                m.metadata.extractTargetHandle = addHandle(handleWriter, from::getTargetExtractor);
+                directProxyDependencies.add(from);
+            }
+            if (m.conversion() == TypeConversion.WRAP_INTO_PROXY ||
+                    m.conversion() == TypeConversion.DYNAMIC_2_WAY) {
+                Proxy<?> to = m.toProxy();
+                m.metadata.proxyConstructorHandle = addHandle(handleWriter, to::getConstructor);
+                directProxyDependencies.add(to);
+            }
+            if (m.conversion() == TypeConversion.DYNAMIC_2_WAY) {
+                String classField = "c" + classReferences.size();
+                m.metadata.extractableClassField = classField;
+                classReferences.add(m.fromProxy()::getProxyClass);
+                handleWriter.visitField(ACC_PRIVATE | ACC_STATIC, classField, "Ljava/lang/Class;", null, null);
+            }
+        }
+        String bridgeMethodName = methodInfo.name() + "$bridge$" + bridgeMethodCounter;
+        bridgeMethodCounter++;
+
+        MethodVisitor p = proxyWriter.visitMethod(ACC_PUBLIC | ACC_FINAL, methodInfo.name(),
+                methodInfo.descriptor(), methodInfo.genericSignature(), methodInfo.exceptionNames());
+        MethodVisitor b = bridgeWriter.visitMethod(ACC_PUBLIC | ACC_STATIC, bridgeMethodName,
+                bridgeMethodDescriptor, null, null);
+        if (LOG_DEPRECATED && interfaceMethod.isAnnotationPresent(Deprecated.class)) {
+            logDeprecated(p, "Warning: using deprecated JBR API method " +
+                    interfaceMethod.getDeclaringClass().getName() + "#" + interfaceMethod.getName());
+        }
+        MethodVisitor bp = generateBridge ? b : p;
+        bp.visitFieldInsn(GETSTATIC, bridgeOrProxyName, handleName, MH_DESCRIPTOR);
+        if (passInstance) {
+            p.visitVarInsn(ALOAD, 0);
+            p.visitFieldInsn(GETFIELD, proxyName, "target", OBJECT_DESCRIPTOR);
+            b.visitVarInsn(ALOAD, 0);
+        }
+        int lvIndex = 1;
+        for (TypeMapping param : mapping.parameterMapping) {
+            int opcode = getLoadOpcode(param.from());
+            p.visitVarInsn(opcode, lvIndex);
+            b.visitVarInsn(opcode, lvIndex - (passInstance ? 0 : 1));
+            lvIndex += getParameterSize(param.from());
+            convertValue(bp, bridgeOrProxyName, param);
+        }
+        if (generateBridge) {
+            p.visitMethodInsn(INVOKESTATIC, bridgeName, bridgeMethodName, bridgeMethodDescriptor, false);
+        }
+        bp.visitMethodInsn(INVOKEVIRTUAL, MH_NAME, "invoke", bridgeMethodDescriptor, false);
+        convertValue(bp, bridgeOrProxyName, mapping.returnMapping());
+        int returnOpcode = getReturnOpcode(mapping.returnMapping().to());
+        p.visitInsn(returnOpcode);
+        b.visitInsn(returnOpcode);
+        p.visitMaxs(-1, -1);
+        b.visitMaxs(-1, -1);
+    }
+
+    private String addHandle(ClassVisitor classWriter, Supplier<MethodHandle> handleSupplier) {
+        String handleName = "h" + handles.size();
+        handles.add(handleSupplier);
+        classWriter.visitField(ACC_PRIVATE | ACC_STATIC, handleName, MH_DESCRIPTOR, null, null);
+        return handleName;
+    }
+
+    private static void convertValue(MethodVisitor m, String handlesHolderName, TypeMapping mapping) {
+        if (mapping.conversion() == TypeConversion.IDENTITY) return;
+        Label skipConvert = new Label();
+        m.visitInsn(DUP);
+        m.visitJumpInsn(IFNULL, skipConvert);
+        switch (mapping.conversion()) {
+            case EXTRACT_TARGET ->
+                    m.visitFieldInsn(GETSTATIC, handlesHolderName, mapping.metadata.extractTargetHandle, MH_DESCRIPTOR);
+            case WRAP_INTO_PROXY ->
+                    m.visitFieldInsn(GETSTATIC, handlesHolderName, mapping.metadata.proxyConstructorHandle, MH_DESCRIPTOR);
+            case DYNAMIC_2_WAY -> {
+                m.visitInsn(DUP);
+                m.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;", false);
+                m.visitFieldInsn(GETSTATIC, handlesHolderName, mapping.metadata.extractableClassField, "Ljava/lang/Class;");
+                Label elseBranch = new Label(), afterBranch = new Label();
+                m.visitJumpInsn(IF_ACMPNE, elseBranch);
+                m.visitFieldInsn(GETSTATIC, handlesHolderName, mapping.metadata.extractTargetHandle, MH_DESCRIPTOR);
+                m.visitJumpInsn(GOTO, afterBranch);
+                m.visitLabel(elseBranch);
+                m.visitFieldInsn(GETSTATIC, handlesHolderName, mapping.metadata.proxyConstructorHandle, MH_DESCRIPTOR);
+                m.visitLabel(afterBranch);
+            }
+        }
+        m.visitInsn(SWAP);
+        m.visitMethodInsn(INVOKEVIRTUAL, MH_NAME, "invoke", CONVERSION_DESCRIPTOR, false);
+        m.visitLabel(skipConvert);
+    }
+
+    private static MethodMapping getTargetMethodMapping(Method interfaceMethod) {
+        Class<?>[] params = interfaceMethod.getParameterTypes();
+        TypeMapping[] paramMappings = new TypeMapping[params.length];
+        for (int i = 0; i < params.length; i++) {
+            paramMappings[i] = getTargetTypeMapping(params[i]);
+            params[i] = paramMappings[i].to();
+        }
+        TypeMapping returnMapping = getTargetTypeMapping(interfaceMethod.getReturnType()).inverse();
+        return new MethodMapping(MethodType.methodType(returnMapping.from(), params), returnMapping, paramMappings);
+    }
+
+    private static <T> TypeMapping getTargetTypeMapping(Class<T> userType) {
+        TypeMappingMetadata m = new TypeMappingMetadata();
+        Proxy<T> p = JBRApi.getProxy(userType);
+        if (p != null && p.getInfo().target != null) {
+            Proxy<?> r = JBRApi.getProxy(p.getInfo().target.lookupClass());
+            if (r != null && r.getInfo().target != null) {
+                return new TypeMapping(userType, p.getInfo().target.lookupClass(), TypeConversion.DYNAMIC_2_WAY, p, r, m);
+            }
+            return new TypeMapping(userType, p.getInfo().target.lookupClass(), TypeConversion.EXTRACT_TARGET, p, null, m);
+        }
+        Class<?> interFace = JBRApi.getProxyInterfaceByTargetName(userType.getName());
+        if (interFace != null) {
+            Proxy<?> r = JBRApi.getProxy(interFace);
+            if (r != null) {
+                return new TypeMapping(userType, interFace, TypeConversion.WRAP_INTO_PROXY, null, r, m);
+            }
+        }
+        return new TypeMapping(userType, userType, TypeConversion.IDENTITY, null, null, m);
+    }
+
+    private record MethodMapping(MethodType type, TypeMapping returnMapping, TypeMapping[] parameterMapping)
+            implements Iterable<TypeMapping> {
+        @Override
+        public Iterator<TypeMapping> iterator() {
+            return new Iterator<>() {
+                private int index = -1;
+                @Override
+                public boolean hasNext() {
+                    return index < parameterMapping.length;
+                }
+                @Override
+                public TypeMapping next() {
+                    TypeMapping m = index == -1 ? returnMapping : parameterMapping[index];
+                    index++;
+                    return m;
+                }
+            };
+        }
+
+        /**
+         * Every convertable parameter type is replaced with {@link Object} for bridge descriptor.
+         * Optional {@link Object} is added as first parameter for instance methods.
+         */
+        String getBridgeDescriptor(boolean passInstance) {
+            StringBuilder bd = new StringBuilder("(");
+            if (passInstance) bd.append(OBJECT_DESCRIPTOR);
+            for (TypeMapping m : parameterMapping) {
+                bd.append(m.getBridgeDescriptor());
+            }
+            bd.append(')');
+            bd.append(returnMapping.getBridgeDescriptor());
+            return bd.toString();
+        }
+    }
+
+    private record TypeMapping(Class<?> from, Class<?> to, TypeConversion conversion,
+                               Proxy<?> fromProxy, Proxy<?> toProxy, TypeMappingMetadata metadata) {
+        TypeMapping inverse() {
+            return new TypeMapping(to, from, switch (conversion) {
+                case EXTRACT_TARGET -> TypeConversion.WRAP_INTO_PROXY;
+                case WRAP_INTO_PROXY -> TypeConversion.EXTRACT_TARGET;
+                default -> conversion;
+            }, toProxy, fromProxy, metadata);
+        }
+        String getBridgeDescriptor() {
+            if (conversion == TypeConversion.IDENTITY) return Type.getDescriptor(from);
+            else return "Ljava/lang/Object;";
+        }
+    }
+
+    private static class TypeMappingMetadata {
+        private String extractTargetHandle, proxyConstructorHandle, extractableClassField;
+    }
+
+    private enum TypeConversion {
+        /**
+         * No conversion.
+         */
+        IDENTITY,
+        /**
+         * Take a proxy object and extract its target implementation object.
+         */
+        EXTRACT_TARGET,
+        /**
+         * Create new proxy targeting given implementation object.
+         */
+        WRAP_INTO_PROXY,
+        /**
+         * Decide between {@link #EXTRACT_TARGET} and {@link #WRAP_INTO_PROXY} at runtime, depending on actual object.
+         */
+        DYNAMIC_2_WAY
+    }
+}

src/java.base/share/classes/com/jetbrains/internal/ProxyInfo.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.internal;
+
+import java.lang.invoke.MethodHandles;
+import java.util.HashMap;
+import java.util.Map;
+
+import static java.lang.invoke.MethodHandles.Lookup;
+
+/**
+ * Proxy info, like {@link RegisteredProxyInfo}, but with all classes and lookup contexts resolved.
+ * Contains all necessary information to create a {@linkplain Proxy proxy}.
+ */
+class ProxyInfo {
+
+    final Lookup apiModule;
+    final Type type;
+    final Lookup interFaceLookup;
+    final Class<?> interFace;
+    final Lookup target;
+    final Map<String, StaticMethodMapping> staticMethods = new HashMap<>();
+
+    private ProxyInfo(RegisteredProxyInfo i) {
+        this.apiModule = i.apiModule();
+        type = i.type();
+        interFaceLookup = lookup(getInterfaceLookup(), i.interfaceName());
+        interFace = interFaceLookup == null ? null : interFaceLookup.lookupClass();
+        target = i.target() == null ? null : lookup(getTargetLookup(), i.target());
+        for (RegisteredProxyInfo.StaticMethodMapping m : i.staticMethods()) {
+            Lookup l = lookup(getTargetLookup(), m.clazz());
+            if (l != null) {
+                staticMethods.put(m.interfaceMethodName(), new StaticMethodMapping(l, m.methodName()));
+            }
+        }
+    }
+
+    /**
+     * Resolve all classes and lookups for given {@link RegisteredProxyInfo}.
+     */
+    static ProxyInfo resolve(RegisteredProxyInfo i) {
+        ProxyInfo info = new ProxyInfo(i);
+        if (info.interFace == null || (info.target == null && info.staticMethods.isEmpty())) return null;
+        if (!info.interFace.isInterface()) {
+            if (info.type == Type.CLIENT_PROXY) {
+                throw new RuntimeException("Tried to create client proxy for non-interface: " + info.interFace);
+            } else {
+                return null;
+            }
+        }
+        return info;
+    }
+
+    Lookup getInterfaceLookup() {
+        return type == Type.CLIENT_PROXY ? apiModule : JBRApi.outerLookup;
+    }
+
+    Lookup getTargetLookup() {
+        return type == Type.CLIENT_PROXY ? JBRApi.outerLookup : apiModule;
+    }
+
+    private Lookup lookup(Lookup lookup, String clazz) {
+        try {
+            return MethodHandles.privateLookupIn(lookup.findClass(clazz), lookup);
+        } catch (ClassNotFoundException | IllegalAccessException e) {
+            if (lookup == JBRApi.outerLookup) return null;
+            else throw new RuntimeException(e);
+        }
+    }
+
+    record StaticMethodMapping(Lookup lookup, String methodName) {}
+
+    /**
+     * Proxy type, see {@link Proxy}
+     */
+    enum Type {
+        PROXY,
+        SERVICE,
+        CLIENT_PROXY
+    }
+}

src/java.base/share/classes/com/jetbrains/internal/RegisteredProxyInfo.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2000-2021 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jetbrains.internal;
+
+import java.lang.invoke.MethodHandles;
+import java.util.List;
+
+/**
+ * Raw proxy info, as it was registered through {@link JBRApi.ModuleRegistry}.
+ * Contains all necessary information to create a {@linkplain Proxy proxy}.
+ */
+record RegisteredProxyInfo(MethodHandles.Lookup apiModule,
+                           String interfaceName,
+                           String target,
+                           ProxyInfo.Type type,
+                           List<StaticMethodMapping> staticMethods) {
+
+    record StaticMethodMapping(String interfaceMethodName, String clazz, String methodName) {}
+}

src/java.base/share/classes/java/nio/file/FileTreeWalker.java

@@ -25,6 +25,8 @@
 
 package java.nio.file;
 
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.BasicWithKeyFileAttributeView;
 import java.nio.file.attribute.BasicFileAttributes;
 import java.io.Closeable;
 import java.io.IOException;
@@ -217,7 +219,11 @@ class FileTreeWalker implements Closeable {
         // links then a link target might not exist so get attributes of link
         BasicFileAttributes attrs;
         try {
-            attrs = Files.readAttributes(file, BasicFileAttributes.class, linkOptions);
+            BasicFileAttributeView view = Files.getFileAttributeView(file, BasicWithKeyFileAttributeView.class, linkOptions);
+            if (view == null) {
+                view = Files.getFileAttributeView(file, BasicFileAttributeView.class, linkOptions);
+            }
+            attrs = view.readAttributes();
         } catch (IOException ioe) {
             if (!followLinks)
                 throw ioe;

src/java.base/share/classes/java/nio/file/attribute/BasicWithKeyFileAttributeView.java

@@ -1,6 +1,5 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!--
- * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
+/*
+ * Copyright (c) 2007, 2011, 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
@@ -22,11 +21,18 @@
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
--->
-<configuration version="2.0" label="TestSettings" description="Configuration for testing promotion failed event" provider="Oracle">
+ */
 
-    <event name="jdk.EvacuationFailed">
-      <setting name="enabled">true</setting>
-      <setting name="threshold">0 ms</setting>
-    </event>
-</configuration>
+package java.nio.file.attribute;
+
+import java.io.IOException;
+
+/**
+ * Similar to {@link BasicFileAttributeView} with a hint to implementors
+ * to retrieve a valid {@link BasicFileAttributes#fileKey()} if possible, even
+ * at a performance cost.
+ */
+
+public interface BasicWithKeyFileAttributeView
+    extends BasicFileAttributeView {
+}

src/java.base/share/classes/module-info.java

@@ -129,11 +129,14 @@ module java.base {
     exports javax.security.auth.spi;
     exports javax.security.auth.x500;
     exports javax.security.cert;
+    exports com.jetbrains.bootstrap;
 
 
     // additional qualified exports may be inserted at build time
     // see make/gensrc/GenModuleInfo.gmk
 
+    exports com.jetbrains.internal to
+            java.desktop;
     exports com.sun.crypto.provider to
         jdk.crypto.cryptoki;
     exports sun.invoke.util to

src/java.base/share/classes/sun/nio/ch/SocketChannelImpl.java

@@ -700,11 +700,11 @@ class SocketChannelImpl
     private SocketAddress unixBind(SocketAddress local) throws IOException {
         UnixDomainSockets.checkPermission();
         if (local == null) {
-            return UnixDomainSockets.UNNAMED;
+            return UnixDomainSockets.getUNNAMED();
         } else {
             Path path = UnixDomainSockets.checkAddress(local).getPath();
             if (path.toString().isEmpty()) {
-                return UnixDomainSockets.UNNAMED;
+                return UnixDomainSockets.getUNNAMED();
             } else {
                 // bind to non-empty path
                 UnixDomainSockets.bind(fd, path);

src/java.base/share/classes/sun/nio/ch/UnixDomainSockets.java

@@ -44,7 +44,9 @@ import sun.nio.fs.AbstractFileSystemProvider;
 class UnixDomainSockets {
     private UnixDomainSockets() { }
 
-    static final UnixDomainSocketAddress UNNAMED = UnixDomainSocketAddress.of("");
+    private static class UNNAMEDHolder {
+        static final UnixDomainSocketAddress UNNAMED =  UnixDomainSocketAddress.of("");
+    }
 
     private static final boolean supported;
 
@@ -71,7 +73,7 @@ class UnixDomainSockets {
             // Security check passed
         } catch (SecurityException e) {
             // Return unnamed address only if security check fails
-            addr = UNNAMED;
+            addr = getUNNAMED();
         }
         return addr;
     }
@@ -178,4 +180,8 @@ class UnixDomainSockets {
         IOUtil.load();
         supported = init();
     }
+
+    static UnixDomainSocketAddress getUNNAMED() {
+        return UNNAMEDHolder.UNNAMED;
+    }
 }

src/java.base/unix/native/libjli/java_md.c

@@ -27,6 +27,7 @@
 #include "jvm_md.h"
 #include <dirent.h>
 #include <dlfcn.h>
+#include <link.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <stdio.h>
@@ -220,6 +221,39 @@ ContainsLibJVM(const char *env) {
     return JNI_FALSE;
 }
 
+static int
+HaveGLibCCompatLibrary(struct dl_phdr_info* info, size_t size, void* data)
+{
+    static const char * const GLIBC_COMPAT_LIBRARY_NAME = "libgcompat.so";
+
+    const char * const so_pathname = info->dlpi_name;
+    if (so_pathname != NULL && so_pathname[0] != 0) {
+        const char * const last_slash = JLI_StrRChr(so_pathname, '/');
+        const char * const so_basename = (last_slash != NULL) ? last_slash + 1 : so_pathname;
+        if (JLI_StrNCmp(so_basename, GLIBC_COMPAT_LIBRARY_NAME, JLI_StrLen(GLIBC_COMPAT_LIBRARY_NAME)) == 0) {
+            return JNI_TRUE;
+        }
+    }
+
+    return 0; /* also means continue to iterate */
+}
+
+static jboolean
+UsingMusl(void) {
+    const jlong start = CurrentTimeMicros();
+
+    const int found_gcompat = dl_iterate_phdr(HaveGLibCCompatLibrary, NULL);
+
+    if (JLI_IsTraceLauncher()) {
+        const jlong end = CurrentTimeMicros();
+        JLI_TraceLauncher("%ld micro seconds to check for the musl compatibility layer for glibc\n",
+                          (long)(end - start));
+    }
+
+    return (found_gcompat != 0);
+}
+
+
 /*
  * Test whether the environment variable needs to be set, see flowchart.
  */
@@ -243,6 +277,10 @@ RequiresSetenv(const char *jvmpath) {
     return JNI_TRUE;
 #endif
 
+    if (UsingMusl()) {
+        return JNI_TRUE;
+    }
+
     llp = getenv("LD_LIBRARY_PATH");
     /* no environment variable is a good environment variable */
     if (llp == NULL && dmllp == NULL) {

src/java.base/windows/classes/sun/nio/fs/WindowsDirectoryStream.java

@@ -41,16 +41,16 @@ import static sun.nio.fs.WindowsConstants.*;
 class WindowsDirectoryStream
     implements DirectoryStream<Path>
 {
+    private static final int NATIVE_BUFFER_SIZE = 8192;
+
     private final WindowsPath dir;
     private final DirectoryStream.Filter<? super Path> filter;
 
-    // handle to directory
-    private final long handle;
-    // first entry in the directory
-    private final String firstName;
+    // Query directory information data structure
+    private final QueryDirectoryInformation queryDirectoryInformation;
 
-    // buffer for WIN32_FIND_DATA structure that receives information about file
-    private final NativeBuffer findDataBuffer;
+    // Buffer used to receive file entries from NtQueryDirectoryInformation calls
+    private final NativeBuffer queryDirectoryInformationBuffer;
 
     private final Object closeLock = new Object();
 
@@ -65,21 +65,15 @@ class WindowsDirectoryStream
         this.dir = dir;
         this.filter = filter;
 
+        this.queryDirectoryInformationBuffer = NativeBuffers.getNativeBuffer(NATIVE_BUFFER_SIZE);
         try {
-            // Need to append * or \* to match entries in directory.
+            // Open the directory for reading and read the first set of entries in the native buffer
             String search = dir.getPathForWin32Calls();
-            char last = search.charAt(search.length() -1);
-            if (last == ':' || last == '\\') {
-                search += "*";
-            } else {
-                search += "\\*";
-            }
-
-            FirstFile first = FindFirstFile(search);
-            this.handle = first.handle();
-            this.firstName = first.name();
-            this.findDataBuffer = WindowsFileAttributes.getBufferForFindData();
+            this.queryDirectoryInformation = OpenNtQueryDirectoryInformation(search, this.queryDirectoryInformationBuffer);
         } catch (WindowsException x) {
+            // Release the buffer, as this instance is not fully constructed
+            this.queryDirectoryInformationBuffer.release();
+
             if (x.lastError() == ERROR_DIRECTORY) {
                 throw new NotDirectoryException(dir.getPathForExceptionMessage());
             }
@@ -99,9 +93,9 @@ class WindowsDirectoryStream
                 return;
             isOpen = false;
         }
-        findDataBuffer.release();
+        queryDirectoryInformationBuffer.release();
         try {
-            FindClose(handle);
+            CloseNtQueryDirectoryInformation(queryDirectoryInformation);
         } catch (WindowsException x) {
             x.rethrowAsIOException(dir);
         }
@@ -115,20 +109,20 @@ class WindowsDirectoryStream
         synchronized (this) {
             if (iterator != null)
                 throw new IllegalStateException("Iterator already obtained");
-            iterator = new WindowsDirectoryIterator(firstName);
+            iterator = new WindowsDirectoryIterator();
             return iterator;
         }
     }
 
     private class WindowsDirectoryIterator implements Iterator<Path> {
         private boolean atEof;
-        private String first;
         private Path nextEntry;
         private String prefix;
+        private int nextOffset;
 
-        WindowsDirectoryIterator(String first) {
+        WindowsDirectoryIterator() {
             atEof = false;
-            this.first = first;
+            nextOffset = 0;
             if (dir.needsSlashWhenResolving()) {
                 prefix = dir.toString() + "\\";
             } else {
@@ -156,44 +150,40 @@ class WindowsDirectoryStream
 
         // reads next directory entry
         private Path readNextEntry() {
-            // handle first element returned by search
-            if (first != null) {
-                nextEntry = isSelfOrParent(first) ? null : acceptEntry(first, null);
-                first = null;
-                if (nextEntry != null)
-                    return nextEntry;
-            }
-
             for (;;) {
-                String name = null;
+                String name;
                 WindowsFileAttributes attrs;
 
                 // synchronize on closeLock to prevent close while reading
                 synchronized (closeLock) {
-                    try {
-                        if (isOpen) {
-                            name = FindNextFile(handle, findDataBuffer.address());
-                        }
-                    } catch (WindowsException x) {
-                        IOException ioe = x.asIOException(dir);
-                        throw new DirectoryIteratorException(ioe);
-                    }
-
-                    // NO_MORE_FILES or stream closed
-                    if (name == null) {
+                    // Fetch next set of entries if we don't have anything available in buffer
+                    if (!isOpen) {
                         atEof = true;
                         return null;
                     }
 
-                    // ignore link to self and parent directories
-                    if (isSelfOrParent(name))
-                        continue;
+                    if (nextOffset < 0) {
+                        try {
+                            atEof = !NextNtQueryDirectoryInformation(queryDirectoryInformation, queryDirectoryInformationBuffer);
+                        } catch (WindowsException x) {
+                            IOException ioe = x.asIOException(dir);
+                            throw new DirectoryIteratorException(ioe);
+                        }
+                        if (atEof) {
+                            return null;
+                        }
+                        nextOffset = 0;
+                    }
 
-                    // grab the attributes from the WIN32_FIND_DATA structure
-                    // (needs to be done while holding closeLock because close
-                    // will release the buffer)
-                    attrs = WindowsFileAttributes
-                        .fromFindData(findDataBuffer.address());
+                    long fullDirInformationAddress = queryDirectoryInformationBuffer.address() + nextOffset;
+                    int nextEntryOffset = WindowsFileAttributes.getNextOffsetFromFileIdFullDirInformation(fullDirInformationAddress);
+                    nextOffset = nextEntryOffset == 0 ? -1 : nextOffset + nextEntryOffset;
+                    name = WindowsFileAttributes.getFileNameFromFileIdFullDirInformation(fullDirInformationAddress);
+                    if (isSelfOrParent(name)) {
+                        // Skip "." and ".."
+                        continue;
+                    }
+                    attrs = WindowsFileAttributes.fromFileIdFullDirInformation(fullDirInformationAddress, queryDirectoryInformation.volSerialNumber());
                 }
 
                 // return entry if accepted by filter

src/java.base/windows/classes/sun/nio/fs/WindowsFileAttributeViews.java

@@ -150,6 +150,23 @@ class WindowsFileAttributeViews {
         }
     }
 
+    private static class BasicWithKey extends Basic {
+        BasicWithKey(WindowsPath file, boolean followLinks) {
+            super(file, followLinks);
+        }
+
+        @Override
+        public WindowsFileAttributes readAttributes() throws IOException {
+            file.checkRead();
+            try {
+                return WindowsFileAttributes.getWithFileKey(file, followLinks);
+            } catch (WindowsException x) {
+                x.rethrowAsIOException(file);
+                return null;    // keep compiler happy
+            }
+        }
+    }
+
     static class Dos extends Basic implements DosFileAttributeView {
         private static final String READONLY_NAME = "readonly";
         private static final String ARCHIVE_NAME = "archive";
@@ -289,6 +306,10 @@ class WindowsFileAttributeViews {
         return new Basic(file, followLinks);
     }
 
+    static Basic createBasicWithKeyView(WindowsPath file, boolean followLinks) {
+        return new BasicWithKey(file, followLinks);
+    }
+
     static Dos createDosView(WindowsPath file, boolean followLinks) {
         return new Dos(file, followLinks);
     }

src/java.base/windows/classes/sun/nio/fs/WindowsFileAttributes.java

@@ -108,10 +108,42 @@ class WindowsFileAttributes
     private static final short OFFSETOF_FIND_DATA_SIZELOW = 32;
     private static final short OFFSETOF_FIND_DATA_RESERVED0 = 36;
 
+
     // used to adjust values between Windows and java epochs
     private static final long WINDOWS_EPOCH_IN_MICROS = -11644473600000000L;
     private static final long WINDOWS_EPOCH_IN_100NS  = -116444736000000000L;
 
+    /**
+     * typedef struct _FILE_ID_FULL_DIR_INFORMATION {
+     *  ULONG         NextEntryOffset;  // offset = 0
+     *  ULONG         FileIndex;        // offset = 4
+     *  LARGE_INTEGER CreationTime;     // offset = 8
+     *  LARGE_INTEGER LastAccessTime;   // offset = 16
+     *  LARGE_INTEGER LastWriteTime;    // offset = 24
+     *  LARGE_INTEGER ChangeTime;       // offset = 32
+     *  LARGE_INTEGER EndOfFile;        // offset = 40
+     *  LARGE_INTEGER AllocationSize;   // offset = 48
+     *  ULONG         FileAttributes;   // offset = 56
+     *  ULONG         FileNameLength;   // offset = 60
+     *  ULONG         EaSize;           // offset = 64
+     *  LARGE_INTEGER FileId;           // offset = 72
+     *  WCHAR         FileName[1];      // offset = 80
+     * } FILE_ID_FULL_DIR_INFORMATION, *PFILE_ID_FULL_DIR_INFORMATION;
+     */
+    private static final int OFFSETOF_FULL_DIR_INFO_NEXT_ENTRY_OFFSET = 0;
+    private static final int OFFSETOF_FULL_DIR_INFO_CREATION_TIME = 8;
+    private static final int OFFSETOF_FULL_DIR_INFO_LAST_ACCESS_TIME = 16;
+    private static final int OFFSETOF_FULL_DIR_INFO_LAST_WRITE_TIME = 24;
+    private static final int OFFSETOF_FULL_DIR_INFO_END_OF_FILE = 40;
+    private static final int OFFSETOF_FULL_DIR_INFO_FILE_ATTRIBUTES = 56;
+    private static final int OFFSETOF_FULL_DIR_INFO_FILENAME_LENGTH = 60;
+    private static final int OFFSETOF_FULL_DIR_INFO_EA_SIZE = 64;
+    private static final int OFFSETOF_FULL_DIR_INFO_FILE_ID = 72;
+    private static final int OFFSETOF_FULL_DIR_INFO_FILENAME = 80;
+
+    // used to adjust values between Windows and java epoch
+    private static final long WINDOWS_EPOCH_IN_MICROSECONDS = -11644473600000000L;
+
     // indicates if accurate metadata is required (interesting on NTFS only)
     private static final boolean ensureAccurateMetadata;
     static {
@@ -133,6 +165,9 @@ class WindowsFileAttributes
     private final int fileIndexHigh;
     private final int fileIndexLow;
 
+    // created lazily
+    private volatile WindowsFileKey key;
+
     /**
      * Convert 64-bit value representing the number of 100-nanosecond intervals
      * since January 1, 1601 to a FileTime.
@@ -257,6 +292,47 @@ class WindowsFileAttributes
                                          0); // fileIndexLow
     }
 
+    /**
+     * Create a WindowsFileAttributes from a FILE_ID_FULL_DIR_INFORMATION structure
+     */
+    static WindowsFileAttributes fromFileIdFullDirInformation(long address, int volSerialNumber) {
+        int fileAttrs = unsafe.getInt(address + OFFSETOF_FULL_DIR_INFO_FILE_ATTRIBUTES);
+        long creationTime = unsafe.getLong(address + OFFSETOF_FULL_DIR_INFO_CREATION_TIME);
+        long lastAccessTime = unsafe.getLong(address + OFFSETOF_FULL_DIR_INFO_LAST_ACCESS_TIME);
+        long lastWriteTime = unsafe.getLong(address + OFFSETOF_FULL_DIR_INFO_LAST_WRITE_TIME);
+        long size = unsafe.getLong(address + OFFSETOF_FULL_DIR_INFO_END_OF_FILE);
+        int reparseTag = isReparsePoint(fileAttrs) ?
+            unsafe.getInt(address + OFFSETOF_FULL_DIR_INFO_EA_SIZE) : 0;
+        int fileIndexLow = unsafe.getInt(address + OFFSETOF_FULL_DIR_INFO_FILE_ID);
+        int fileIndexHigh = unsafe.getInt(address + OFFSETOF_FULL_DIR_INFO_FILE_ID + 4);
+
+        return new WindowsFileAttributes(fileAttrs,
+                                         creationTime,
+                                         lastAccessTime,
+                                         lastWriteTime,
+                                         size,
+                                         reparseTag,
+                                         volSerialNumber,
+                                         fileIndexHigh,  // fileIndexHigh
+                                         fileIndexLow); // fileIndexLow
+    }
+
+    static int getNextOffsetFromFileIdFullDirInformation(long address) {
+        return unsafe.getInt(address + OFFSETOF_FULL_DIR_INFO_NEXT_ENTRY_OFFSET);
+    }
+
+    static String getFileNameFromFileIdFullDirInformation(long address) {
+        // copy the name
+        int nameLengthInBytes = unsafe.getInt(address + OFFSETOF_FULL_DIR_INFO_FILENAME_LENGTH);
+        if ((nameLengthInBytes % 2) != 0) {
+            throw new AssertionError("FileNameLength is not a multiple of 2");
+        }
+        char[] nameAsArray = new char[nameLengthInBytes/2];
+        unsafe.copyMemory(null, address + OFFSETOF_FULL_DIR_INFO_FILENAME, nameAsArray,
+            Unsafe.ARRAY_CHAR_BASE_OFFSET, nameLengthInBytes);
+        return new String(nameAsArray);
+    }
+
     /**
      * Reads the attributes of an open file
      */
@@ -347,6 +423,15 @@ class WindowsFileAttributes
         }
 
         // file is reparse point so need to open file to get attributes
+        return getWithFileKey(path, followLinks);
+    }
+
+    /**
+     * Returns attributes of given file.
+     */
+    static WindowsFileAttributes getWithFileKey(WindowsPath path, boolean followLinks)
+        throws WindowsException
+    {
         long handle = path.openForReadAttributeAccess(followLinks);
         try {
             return readAttributes(handle);
@@ -414,7 +499,17 @@ class WindowsFileAttributes
 
     @Override
     public Object fileKey() {
-        return null;
+        if (volSerialNumber == 0) {
+            return null;
+        }
+        if (key == null) {
+            synchronized (this) {
+                if (key == null) {
+                    key = new WindowsFileKey(volSerialNumber, ((long)fileIndexHigh << 32) + fileIndexLow);
+                }
+            }
+        }
+        return key;
     }
 
     // package private

src/java.base/windows/classes/sun/nio/fs/WindowsFileKey.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2008, 2009, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.nio.fs;
+
+/**
+ * Container for volume/file id to uniquely identify file.
+ */
+
+class WindowsFileKey {
+    private final int volSerialNumber;
+    private final long fileId;
+
+    WindowsFileKey(int volSerialNumber, long fileId) {
+        this.volSerialNumber = volSerialNumber;
+        this.fileId = fileId;
+    }
+
+    @Override
+    public int hashCode() {
+        return (volSerialNumber ^ (volSerialNumber >>> 16)) +
+               (int)(fileId ^ (fileId >>> 32));
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this)
+            return true;
+        if (!(obj instanceof WindowsFileKey))
+            return false;
+        WindowsFileKey other = (WindowsFileKey)obj;
+        return (this.volSerialNumber == other.volSerialNumber) && (this.fileId == other.fileId);
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("(volId=")
+          .append(Integer.toHexString(volSerialNumber))
+          .append(",fileId=")
+          .append(Long.toHexString(fileId))
+          .append(')');
+        return sb.toString();
+    }
+}

src/java.base/windows/classes/sun/nio/fs/WindowsFileSystemProvider.java

@@ -168,6 +168,8 @@ class WindowsFileSystemProvider
         boolean followLinks = Util.followLinks(options);
         if (view == BasicFileAttributeView.class)
             return (V) WindowsFileAttributeViews.createBasicView(file, followLinks);
+        if (view == BasicWithKeyFileAttributeView.class)
+            return (V) WindowsFileAttributeViews.createBasicWithKeyView(file, followLinks);
         if (view == DosFileAttributeView.class)
             return (V) WindowsFileAttributeViews.createDosView(file, followLinks);
         if (view == AclFileAttributeView.class)
@@ -205,6 +207,8 @@ class WindowsFileSystemProvider
         boolean followLinks = Util.followLinks(options);
         if (name.equals("basic"))
             return WindowsFileAttributeViews.createBasicView(file, followLinks);
+        if (name.equals("basicwithkey"))
+            return WindowsFileAttributeViews.createBasicWithKeyView(file, followLinks);
         if (name.equals("dos"))
             return WindowsFileAttributeViews.createDosView(file, followLinks);
         if (name.equals("acl"))

src/java.base/windows/classes/sun/nio/fs/WindowsNativeDispatcher.java

@@ -285,6 +285,38 @@ class WindowsNativeDispatcher {
      */
     static native void FindClose(long handle) throws WindowsException;
 
+    static QueryDirectoryInformation OpenNtQueryDirectoryInformation(String path, NativeBuffer buffer) throws WindowsException {
+        NativeBuffer pathBuffer = asNativeBuffer(path);
+        try {
+            QueryDirectoryInformation data = new QueryDirectoryInformation();
+            OpenNtQueryDirectoryInformation0(pathBuffer.address(), buffer.address(), buffer.size(), data);
+            return data;
+        } finally {
+            pathBuffer.release();
+        }
+    }
+    static class QueryDirectoryInformation {
+        private long handle;
+        private int volSerialNumber;
+
+        private QueryDirectoryInformation() { }
+        public long handle()         { return handle; }
+        public int volSerialNumber() { return volSerialNumber; }
+    }
+    private static native void OpenNtQueryDirectoryInformation0(long lpFileName, long buffer, int bufferSize, QueryDirectoryInformation obj)
+        throws WindowsException;
+
+    static boolean NextNtQueryDirectoryInformation(QueryDirectoryInformation data, NativeBuffer buffer) throws WindowsException {
+        return NextNtQueryDirectoryInformation0(data.handle(), buffer.address(), buffer.size());
+    }
+
+    private static native boolean NextNtQueryDirectoryInformation0(long handle, long buffer, int bufferSize)
+        throws WindowsException;
+
+    static void CloseNtQueryDirectoryInformation(QueryDirectoryInformation data) throws WindowsException {
+        CloseHandle(data.handle);
+    }
+
     /**
      * GetFileInformationByHandle(
      *   HANDLE hFile,

src/java.base/windows/native/libjava/java_props_md.c

@@ -471,6 +471,8 @@ GetJavaProperties(JNIEnv* env)
          * Windows Server 2012          6               2  (!VER_NT_WORKSTATION)
          * Windows Server 2012 R2       6               3  (!VER_NT_WORKSTATION)
          * Windows 10                   10              0  (VER_NT_WORKSTATION)
+         * Windows 11                   10              0  (VER_NT_WORKSTATION)
+         *       where (buildNumber >= 22000)
          * Windows Server 2016          10              0  (!VER_NT_WORKSTATION)
          * Windows Server 2019          10              0  (!VER_NT_WORKSTATION)
          *       where (buildNumber > 17762)
@@ -542,7 +544,14 @@ GetJavaProperties(JNIEnv* env)
             } else if (majorVersion == 10) {
                 if (is_workstation) {
                     switch (minorVersion) {
-                    case  0: sprops.os_name = "Windows 10";           break;
+                    case  0:
+                        /* Windows 11 21H2 (original release) build number is 22000 */
+                        if (buildNumber >= 22000) {
+                            sprops.os_name = "Windows 11";
+                        } else {
+                            sprops.os_name = "Windows 10";
+                        }
+                        break;
                     default: sprops.os_name = "Windows NT (unknown)";
                     }
                 } else {

src/java.base/windows/native/libnio/fs/WindowsNativeDispatcher.c

@@ -38,6 +38,8 @@
 #include "jni_util.h"
 #include "jlong.h"
 
+#include "ntifs_min.h"
+
 #include "sun_nio_fs_WindowsNativeDispatcher.h"
 
 /**
@@ -50,6 +52,9 @@ static jfieldID findFirst_attributes;
 static jfieldID findStream_handle;
 static jfieldID findStream_name;
 
+static jfieldID queryDirectoryInformation_handle;
+static jfieldID queryDirectoryInformation_volSerialNumber;
+
 static jfieldID volumeInfo_fsName;
 static jfieldID volumeInfo_volName;
 static jfieldID volumeInfo_volSN;
@@ -71,6 +76,13 @@ static jfieldID completionStatus_error;
 static jfieldID completionStatus_bytesTransferred;
 static jfieldID completionStatus_completionKey;
 
+typedef NTSYSCALLAPI NTSTATUS(NTAPI* NtQueryDirectoryFile_Proc) (HANDLE, HANDLE, PIO_APC_ROUTINE,
+    PVOID, PIO_STATUS_BLOCK, PVOID, ULONG, FILE_INFORMATION_CLASS, BOOLEAN, PUNICODE_STRING, BOOLEAN);
+typedef ULONG(NTAPI* RtlNtStatusToDosError_Proc) (NTSTATUS);
+
+static NtQueryDirectoryFile_Proc NtQueryDirectoryFile_func;
+static RtlNtStatusToDosError_Proc RtlNtStatusToDosError_func;
+
 static void throwWindowsException(JNIEnv* env, DWORD lastError) {
     jobject x = JNU_NewObjectByName(env, "sun/nio/fs/WindowsException",
         "(I)V", lastError);
@@ -87,6 +99,7 @@ JNIEXPORT void JNICALL
 Java_sun_nio_fs_WindowsNativeDispatcher_initIDs(JNIEnv* env, jclass this)
 {
     jclass clazz;
+    HMODULE h;
 
     clazz = (*env)->FindClass(env, "sun/nio/fs/WindowsNativeDispatcher$FirstFile");
     CHECK_NULL(clazz);
@@ -104,6 +117,13 @@ Java_sun_nio_fs_WindowsNativeDispatcher_initIDs(JNIEnv* env, jclass this)
     findStream_name = (*env)->GetFieldID(env, clazz, "name", "Ljava/lang/String;");
     CHECK_NULL(findStream_name);
 
+    clazz = (*env)->FindClass(env, "sun/nio/fs/WindowsNativeDispatcher$QueryDirectoryInformation");
+    CHECK_NULL(clazz);
+    queryDirectoryInformation_handle = (*env)->GetFieldID(env, clazz, "handle", "J");
+    CHECK_NULL(queryDirectoryInformation_handle);
+    queryDirectoryInformation_volSerialNumber = (*env)->GetFieldID(env, clazz, "volSerialNumber", "I");;
+    CHECK_NULL(queryDirectoryInformation_volSerialNumber);
+
     clazz = (*env)->FindClass(env, "sun/nio/fs/WindowsNativeDispatcher$VolumeInformation");
     CHECK_NULL(clazz);
     volumeInfo_fsName = (*env)->GetFieldID(env, clazz, "fileSystemName", "Ljava/lang/String;");
@@ -148,6 +168,16 @@ Java_sun_nio_fs_WindowsNativeDispatcher_initIDs(JNIEnv* env, jclass this)
     CHECK_NULL(completionStatus_bytesTransferred);
     completionStatus_completionKey = (*env)->GetFieldID(env, clazz, "completionKey", "J");
     CHECK_NULL(completionStatus_completionKey);
+
+    // get handle to ntdll
+    if (GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+        L"ntdll.dll", &h) != 0)
+    {
+        NtQueryDirectoryFile_func =
+            (NtQueryDirectoryFile_Proc)GetProcAddress(h, "NtQueryDirectoryFile");
+        RtlNtStatusToDosError_func =
+            (RtlNtStatusToDosError_Proc)GetProcAddress(h, "RtlNtStatusToDosError");
+    }
 }
 
 JNIEXPORT jlong JNICALL
@@ -428,6 +458,118 @@ Java_sun_nio_fs_WindowsNativeDispatcher_FindClose(JNIEnv* env, jclass this,
 }
 
 
+JNIEXPORT void JNICALL
+Java_sun_nio_fs_WindowsNativeDispatcher_OpenNtQueryDirectoryInformation0(JNIEnv* env, jclass this,
+    jlong address, jlong bufferAddress, jint bufferSize, jobject obj)
+{
+    LPCWSTR lpFileName = jlong_to_ptr(address);
+    BOOL ok;
+    BY_HANDLE_FILE_INFORMATION info;
+    HANDLE handle;
+    NTSTATUS status;
+    ULONG win32ErrorCode;
+    IO_STATUS_BLOCK ioStatusBlock;
+
+    if ((NtQueryDirectoryFile_func == NULL) || (RtlNtStatusToDosError_func == NULL)) {
+        JNU_ThrowInternalError(env, "Should not get here");
+        return;
+    }
+
+    handle = CreateFileW(lpFileName, FILE_LIST_DIRECTORY,
+            FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+            NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+    if (handle == INVALID_HANDLE_VALUE) {
+        throwWindowsException(env, GetLastError());
+        return;
+    }
+
+    status = NtQueryDirectoryFile_func(
+        handle, // FileHandle
+        NULL, // Event
+        NULL, // ApcRoutine
+        NULL, // ApcContext
+        &ioStatusBlock, // IoStatusBlock
+        jlong_to_ptr(bufferAddress), // FileInformation
+        bufferSize, // Length
+        FileIdFullDirectoryInformation, // FileInformationClass
+        FALSE, // ReturnSingleEntry
+        NULL, // FileName
+        FALSE); // RestartScan
+
+    if (!NT_SUCCESS(status)) {
+        /*
+        * NtQueryDirectoryFile returns STATUS_INVALID_PARAMETER when
+        * asked to enumerate an invalid directory (ie it is a file
+        * instead of a directory).  Verify that is the actual cause
+        * of the error.
+        */
+        if (status == STATUS_INVALID_PARAMETER) {
+            DWORD attributes = GetFileAttributesW(lpFileName);
+            if ((attributes & FILE_ATTRIBUTE_DIRECTORY) == 0) {
+                status = STATUS_NOT_A_DIRECTORY;
+            }
+        }
+
+        win32ErrorCode = RtlNtStatusToDosError_func(status);
+        throwWindowsException(env, win32ErrorCode);
+        CloseHandle(handle);
+        return;
+    }
+
+    // This call allows retrieving the volume ID of this directory (and all its entries)
+    ok = GetFileInformationByHandle(handle, &info);
+    if (!ok) {
+        throwWindowsException(env, GetLastError());
+        CloseHandle(handle);
+        return;
+    }
+
+    (*env)->SetLongField(env, obj, queryDirectoryInformation_handle, ptr_to_jlong(handle));
+    (*env)->SetIntField(env, obj, queryDirectoryInformation_volSerialNumber, info.dwVolumeSerialNumber);
+}
+
+JNIEXPORT jboolean JNICALL
+Java_sun_nio_fs_WindowsNativeDispatcher_NextNtQueryDirectoryInformation0(JNIEnv* env, jclass this,
+    jlong handle, jlong address, jint size)
+{
+    HANDLE h = (HANDLE)jlong_to_ptr(handle);
+    ULONG win32ErrorCode;
+    IO_STATUS_BLOCK ioStatusBlock;
+    NTSTATUS status;
+
+    if ((NtQueryDirectoryFile_func == NULL) || (RtlNtStatusToDosError_func == NULL)) {
+        JNU_ThrowInternalError(env, "Should not get here");
+        return JNI_FALSE;
+    }
+
+    status = NtQueryDirectoryFile_func(
+        h, // FileHandle
+        NULL, // Event
+        NULL, // ApcRoutine
+        NULL, // ApcContext
+        &ioStatusBlock, // IoStatusBlock
+        jlong_to_ptr(address), // FileInformation
+        size, // Length
+        FileIdFullDirectoryInformation, // FileInformationClass
+        FALSE, // ReturnSingleEntry
+        NULL, // FileName
+        FALSE); // RestartScan
+
+    if (NT_SUCCESS(status)) {
+        return JNI_TRUE;
+    }
+
+    // Normal completion: no more files in directory
+    if (status == STATUS_NO_MORE_FILES) {
+        return JNI_FALSE;
+    }
+
+    win32ErrorCode = RtlNtStatusToDosError_func(status);
+    throwWindowsException(env, win32ErrorCode);
+    return JNI_FALSE;
+}
+
+
 JNIEXPORT void JNICALL
 Java_sun_nio_fs_WindowsNativeDispatcher_GetFileInformationByHandle(JNIEnv* env, jclass this,
     jlong handle, jlong address)

src/java.base/windows/native/libnio/fs/ntifs_min.h

@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2008, 2018, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#ifndef _NTIFS_MIN_
+#define _NTIFS_MIN_
+
+/*
+ * Copy necessary structures and definitions out of the Windows DDK
+ * to enable calling NtQueryDirectoryFile()
+ */
+
+typedef LONG NTSTATUS;
+#define NT_SUCCESS(Status)  (((NTSTATUS)(Status)) >= 0)
+
+typedef struct _UNICODE_STRING {
+    USHORT Length;
+    USHORT MaximumLength;
+    PWCH   Buffer;
+} UNICODE_STRING;
+typedef UNICODE_STRING *PUNICODE_STRING;
+typedef const UNICODE_STRING *PCUNICODE_STRING;
+
+typedef enum _FILE_INFORMATION_CLASS {
+    FileDirectoryInformation = 1,
+    FileFullDirectoryInformation,
+    FileBothDirectoryInformation,
+    FileBasicInformation,
+    FileStandardInformation,
+    FileInternalInformation,
+    FileEaInformation,
+    FileAccessInformation,
+    FileNameInformation,
+    FileRenameInformation,
+    FileLinkInformation,
+    FileNamesInformation,
+    FileDispositionInformation,
+    FilePositionInformation,
+    FileFullEaInformation,
+    FileModeInformation,
+    FileAlignmentInformation,
+    FileAllInformation,
+    FileAllocationInformation,
+    FileEndOfFileInformation,
+    FileAlternateNameInformation,
+    FileStreamInformation,
+    FilePipeInformation,
+    FilePipeLocalInformation,
+    FilePipeRemoteInformation,
+    FileMailslotQueryInformation,
+    FileMailslotSetInformation,
+    FileCompressionInformation,
+    FileObjectIdInformation,
+    FileCompletionInformation,
+    FileMoveClusterInformation,
+    FileQuotaInformation,
+    FileReparsePointInformation,
+    FileNetworkOpenInformation,
+    FileAttributeTagInformation,
+    FileTrackingInformation,
+    FileIdBothDirectoryInformation,
+    FileIdFullDirectoryInformation,
+    FileValidDataLengthInformation,
+    FileShortNameInformation,
+    FileIoCompletionNotificationInformation,
+    FileIoStatusBlockRangeInformation,
+    FileIoPriorityHintInformation,
+    FileSfioReserveInformation,
+    FileSfioVolumeInformation,
+    FileHardLinkInformation,
+    FileProcessIdsUsingFileInformation,
+    FileNormalizedNameInformation,
+    FileNetworkPhysicalNameInformation,
+    FileIdGlobalTxDirectoryInformation,
+    FileIsRemoteDeviceInformation,
+    FileAttributeCacheInformation,
+    FileNumaNodeInformation,
+    FileStandardLinkInformation,
+    FileRemoteProtocolInformation,
+    FileMaximumInformation
+} FILE_INFORMATION_CLASS, *PFILE_INFORMATION_CLASS;
+
+typedef struct _FILE_ID_FULL_DIR_INFORMATION {
+    ULONG         NextEntryOffset;
+    ULONG         FileIndex;
+    LARGE_INTEGER CreationTime;
+    LARGE_INTEGER LastAccessTime;
+    LARGE_INTEGER LastWriteTime;
+    LARGE_INTEGER ChangeTime;
+    LARGE_INTEGER EndOfFile;
+    LARGE_INTEGER AllocationSize;
+    ULONG         FileAttributes;
+    ULONG         FileNameLength;
+    ULONG         EaSize;
+    LARGE_INTEGER FileId;
+    WCHAR         FileName[1];
+} FILE_ID_FULL_DIR_INFORMATION, *PFILE_ID_FULL_DIR_INFORMATION;
+
+typedef struct _IO_STATUS_BLOCK {
+    union {
+        NTSTATUS Status;
+        PVOID Pointer;
+    } u;
+    ULONG_PTR Information;
+} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK;
+
+typedef VOID
+(NTAPI *PIO_APC_ROUTINE)(
+    IN PVOID ApcContext,
+    IN PIO_STATUS_BLOCK IoStatusBlock,
+    IN ULONG Reserved);
+
+NTSYSCALLAPI
+NTSTATUS
+NTAPI
+NtQueryDirectoryFile(
+    _In_ HANDLE FileHandle,
+    _In_opt_ HANDLE Event,
+    _In_opt_ PIO_APC_ROUTINE ApcRoutine,
+    _In_opt_ PVOID ApcContext,
+    _Out_ PIO_STATUS_BLOCK IoStatusBlock,
+    _Out_ PVOID FileInformation,
+    _In_ ULONG Length,
+    _In_ FILE_INFORMATION_CLASS FileInformationClass,
+    _In_ BOOLEAN ReturnSingleEntry,
+    _In_opt_ PUNICODE_STRING FileName,
+    _In_ BOOLEAN RestartScan
+);
+
+ULONG
+NTAPI
+RtlNtStatusToDosError(
+    NTSTATUS Status
+);
+
+#define STATUS_NO_MORE_FILES             ((NTSTATUS)0x80000006L)
+#define STATUS_NOT_A_DIRECTORY           ((NTSTATUS)0xC0000103L)
+
+#endif  // _NTIFS_MIN_

src/java.desktop/macosx/classes/sun/font/CStrike.java

@@ -32,6 +32,7 @@ import java.awt.geom.*;
 import java.util.HashMap;
 import java.util.concurrent.atomic.AtomicBoolean;
 import sun.lwawt.macosx.CThreading;
+import static sun.awt.SunHints.*;
 
 public final class CStrike extends PhysicalStrike {
 
@@ -205,7 +206,15 @@ public final class CStrike extends PhysicalStrike {
             return;
         }
 
-        result.setRect(floatRect.x + pt.x, floatRect.y + pt.y, floatRect.width, floatRect.height);
+        boolean subpixel = desc.aaHint == INTVAL_TEXT_ANTIALIAS_ON &&
+                desc.fmHint == INTVAL_FRACTIONALMETRICS_ON;
+        float subpixelResolutionX = subpixel ? FontUtilities.subpixelResolution.width : 1;
+        float subpixelResolutionY = subpixel ? FontUtilities.subpixelResolution.height : 1;
+        // Before rendering, glyph positions are offset by 0.5 pixels, take into consideration
+        float x = ((int) (pt.x * subpixelResolutionX + 0.5f)) / subpixelResolutionX;
+        float y = ((int) (pt.y * subpixelResolutionY + 0.5f)) / subpixelResolutionY;
+
+        result.setRect(floatRect.x + x, floatRect.y + y, floatRect.width, floatRect.height);
     }
 
     private void getGlyphImageBounds(int glyphCode, float x, float y, Rectangle2D.Float floatRect) {

src/java.desktop/macosx/classes/sun/lwawt/LWWindowPeer.java

@@ -291,6 +291,10 @@ public class LWWindowPeer
         updateFocusableWindowState();
         super.setVisibleImpl(visible);
         // TODO: update graphicsConfig, see 4868278
+        if (visible) {
+            // Set correct background for a window before making it visible
+            platformWindow.setOpaque(!isTranslucent());
+        }
         platformWindow.setVisible(visible);
     }
 

src/java.desktop/macosx/classes/sun/lwawt/macosx/CAccessibility.java

@@ -35,12 +35,14 @@ import java.awt.EventQueue;
 import java.awt.event.KeyEvent;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
+import java.lang.annotation.Native;
 import java.lang.reflect.InvocationTargetException;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.concurrent.Callable;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.Arrays;
 
 import javax.accessibility.Accessible;
 import javax.accessibility.AccessibleAction;
@@ -59,6 +61,8 @@ import javax.swing.JEditorPane;
 import javax.swing.JLabel;
 import javax.swing.JMenuItem;
 import javax.swing.JTextArea;
+import javax.swing.JList;
+import javax.swing.JTree;
 import javax.swing.KeyStroke;
 
 import sun.awt.AWTAccessor;
@@ -128,7 +132,7 @@ class CAccessibility implements PropertyChangeListener {
     static <T> T invokeAndWait(final Callable<T> callable, final Component c) {
         if (c != null) {
             try {
-                return EventQueue.isDispatchThread() ? callable.call() : LWCToolkit.invokeAndWait(callable, c);
+                return EventQueue.isDispatchThread() ? callable.call() : invokeAndWait(callable, c, (T)null);
             } catch (final Exception e) { e.printStackTrace(); }
         }
         return null;
@@ -561,6 +565,10 @@ class CAccessibility implements PropertyChangeListener {
                 if (pac == null) return;
                 AccessibleSelection as = pac.getAccessibleSelection();
                 if (as == null) return;
+                if (parent instanceof JList) {
+                    ((JList) parent).setSelectedIndex(i);
+                    return;
+                }
                 as.addAccessibleSelection(i);
             }
         }, c);
@@ -661,77 +669,148 @@ class CAccessibility implements PropertyChangeListener {
 
     // Duplicated from JavaComponentAccessibility
     // Note that values >=0 are indexes into the child array
-    static final int JAVA_AX_ALL_CHILDREN = -1;
-    static final int JAVA_AX_SELECTED_CHILDREN = -2;
-    static final int JAVA_AX_VISIBLE_CHILDREN = -3;
+    @Native static final int JAVA_AX_ALL_CHILDREN = -1;
+    @Native static final int JAVA_AX_SELECTED_CHILDREN = -2;
+    @Native static final int JAVA_AX_VISIBLE_CHILDREN = -3;
 
     // Each child takes up two entries in the array: one for itself and one for its role
     public static Object[] getChildrenAndRoles(final Accessible a, final Component c, final int whichChildren, final boolean allowIgnored) {
         if (a == null) return null;
         return invokeAndWait(new Callable<Object[]>() {
             public Object[] call() throws Exception {
-                ArrayList<Object> childrenAndRoles = new ArrayList<Object>();
-                _addChildren(a, whichChildren, allowIgnored, childrenAndRoles);
-
-                /* In the case of fetching a selection, need to check to see if
-                 * the active descendant is at the beginning of the list.  If it
-                 * is not it needs to be moved to the beginning of the list so
-                 * VoiceOver will annouce it correctly.  The list returned
-                 * from Java is always in order from top to bottom, but when shift
-                 * selecting downward (extending the list) or multi-selecting using
-                 * the VO keys control+option+command+return the active descendant
-                 * is not at the top of the list in the shift select down case and
-                 * may not be in the multi select case.
-                 */
-                if (whichChildren == JAVA_AX_SELECTED_CHILDREN) {
-                    if (!childrenAndRoles.isEmpty()) {
-                        AccessibleContext activeDescendantAC =
-                            CAccessible.getActiveDescendant(a);
-                        if (activeDescendantAC != null) {
-                            String activeDescendantName =
-                                activeDescendantAC.getAccessibleName();
-                            AccessibleRole activeDescendantRole =
-                                activeDescendantAC.getAccessibleRole();
-                            // Move active descendant to front of list.
-                            // List contains pairs of each selected item's
-                            // Accessible and AccessibleRole.
-                            ArrayList<Object> newArray  = new ArrayList<Object>();
-                            int count = childrenAndRoles.size();
-                            Accessible currentAccessible = null;
-                            AccessibleContext currentAC = null;
-                            String currentName = null;
-                            AccessibleRole currentRole = null;
-                            for (int i = 0; i < count; i+=2) {
-                                // Is this the active descendant?
-                                currentAccessible = (Accessible)childrenAndRoles.get(i);
-                                currentAC = currentAccessible.getAccessibleContext();
-                                currentName = currentAC.getAccessibleName();
-                                currentRole = (AccessibleRole)childrenAndRoles.get(i+1);
-                                if (currentName != null && currentName.equals(activeDescendantName) &&
-                                     currentRole.equals(activeDescendantRole) ) {
-                                    newArray.add(0, currentAccessible);
-                                    newArray.add(1, currentRole);
-                                } else {
-                                    newArray.add(currentAccessible);
-                                    newArray.add(currentRole);
-                                }
-                            }
-                            childrenAndRoles = newArray;
-                        }
-                    }
-                }
-
-                if ((whichChildren < 0) || (whichChildren * 2 >= childrenAndRoles.size())) {
-                    return childrenAndRoles.toArray();
-                }
-
-                return new Object[] { childrenAndRoles.get(whichChildren * 2), childrenAndRoles.get((whichChildren * 2) + 1) };
+                return getChildrenAndRolesImpl(a, c, whichChildren, allowIgnored);
             }
         }, c);
     }
 
-    private static final int JAVA_AX_ROWS = 1;
-    private static final int JAVA_AX_COLS = 2;
+    private static Object[] getChildrenAndRolesImpl(final Accessible a, final Component c, final int whichChildren, final boolean allowIgnored) {
+        if (a == null) return null;
+
+        ArrayList<Object> childrenAndRoles = new ArrayList<Object>();
+        _addChildren(a, whichChildren, allowIgnored, childrenAndRoles);
+
+        /* In case of fetching a selection, we need to check if
+* the active descendant is at the beginning of the list, or
+* otherwise move it, so that VoiceOver announces it correctly.
+                * The java list is always in order from top to bottom, but when
+                * (1) shift-selecting downward (extending the list) or (2) multi-selecting with
+                * the VO keys (CTRL+ALT+CMD+RETURN) the active descendant
+                * is not at the top of the list in the 1st case and may not be in the 2nd.
+                */
+        if (whichChildren == JAVA_AX_SELECTED_CHILDREN) {
+            if (!childrenAndRoles.isEmpty()) {
+                AccessibleContext activeDescendantAC =
+                        CAccessible.getActiveDescendant(a);
+                if (activeDescendantAC != null) {
+                    String activeDescendantName =
+                            activeDescendantAC.getAccessibleName();
+                    AccessibleRole activeDescendantRole =
+                            activeDescendantAC.getAccessibleRole();
+                    // Move active descendant to front of list.
+                    // List contains pairs of each selected item's
+                    // Accessible and AccessibleRole.
+                    ArrayList<Object> newArray = new ArrayList<Object>();
+                    int count = childrenAndRoles.size();
+                    Accessible currentAccessible = null;
+                    AccessibleContext currentAC = null;
+                    String currentName = null;
+                    AccessibleRole currentRole = null;
+                    for (int i = 0; i < count; i += 2) {
+                        // Is this the active descendant?
+                        currentAccessible = (Accessible) childrenAndRoles.get(i);
+                        currentAC = currentAccessible.getAccessibleContext();
+                        currentName = currentAC.getAccessibleName();
+                        currentRole = (AccessibleRole) childrenAndRoles.get(i + 1);
+                        if (currentName != null && currentName.equals(activeDescendantName) &&
+                                currentRole.equals(activeDescendantRole)) {
+                            newArray.add(0, currentAccessible);
+                            newArray.add(1, currentRole);
+                        } else {
+                            newArray.add(currentAccessible);
+                            newArray.add(currentRole);
+                        }
+                    }
+                    childrenAndRoles = newArray;
+                }
+            }
+        }
+
+        if ((whichChildren < 0) || (whichChildren * 2 >= childrenAndRoles.size())) {
+            return childrenAndRoles.toArray();
+        }
+
+        return new Object[]{childrenAndRoles.get(whichChildren * 2), childrenAndRoles.get((whichChildren * 2) + 1)};
+    }
+
+    // This method is called from the native
+    // Each child takes up three entries in the array: one for itself, one for its role, and one for the recursion level
+    private static Object[] getChildrenAndRolesRecursive(final Accessible a, final Component c, final int whichChildren, final boolean allowIgnored, final int level) {
+        if (a == null) return null;
+        return invokeAndWait(new Callable<Object[]>() {
+            public Object[] call() throws Exception {
+                ArrayList<Object> currentLevelChildren = new ArrayList<Object>();
+                ArrayList<Object> allChildren = new ArrayList<Object>();
+                ArrayList<Accessible> parentStack = new ArrayList<Accessible>();
+                parentStack.add(a);
+                ArrayList<Integer> indexses = new ArrayList<Integer>();
+                Integer index = 0;
+                int currentLevel = level;
+                while (!parentStack.isEmpty()) {
+                    Accessible p = parentStack.get(parentStack.size() - 1);
+
+                    currentLevelChildren.addAll(Arrays.asList(getChildrenAndRolesImpl(p, c, JAVA_AX_ALL_CHILDREN, allowIgnored)));
+                    if ((currentLevelChildren.size() == 0) || (index >= currentLevelChildren.size())) {
+                        if (!parentStack.isEmpty()) parentStack.remove(parentStack.size() - 1);
+                        if (!indexses.isEmpty()) index = indexses.remove(indexses.size() - 1);
+                        currentLevel -= 1;
+                        currentLevelChildren.clear();
+                        continue;
+                    }
+
+                    Accessible ca = null;
+                    Object obj = currentLevelChildren.get(index);
+                    if (!(obj instanceof Accessible)) {
+                        index += 2;
+                        currentLevelChildren.clear();
+                        continue;
+                    }
+                    ca = (Accessible) obj;
+                    Object role = currentLevelChildren.get(index + 1);
+                    currentLevelChildren.clear();
+
+                    AccessibleContext cac = ca.getAccessibleContext();
+                    if (cac == null) {
+                        index += 2;
+                        continue;
+                    }
+
+                    if ((cac.getAccessibleStateSet().contains(AccessibleState.SELECTED) && (whichChildren == JAVA_AX_SELECTED_CHILDREN)) ||
+                            (cac.getAccessibleStateSet().contains(AccessibleState.VISIBLE) && (whichChildren == JAVA_AX_VISIBLE_CHILDREN)) ||
+                            (whichChildren == JAVA_AX_ALL_CHILDREN)) {
+                        allChildren.add(ca);
+                        allChildren.add(role);
+                        allChildren.add(String.valueOf(currentLevel));
+                    }
+
+                    index += 2;
+
+                    if (cac.getAccessibleStateSet().contains(AccessibleState.EXPANDED)) {
+                        parentStack.add(ca);
+                        indexses.add(index);
+                        index = 0;
+                        currentLevel += 1;
+                        continue;
+                    }
+
+                }
+
+                return allChildren.toArray();
+            }
+        }, c);
+    }
+
+    @Native private static final int JAVA_AX_ROWS = 1;
+    @Native private static final int JAVA_AX_COLS = 2;
 
     public static int getTableInfo(final Accessible a, final Component c,
                                    final int info) {
@@ -750,6 +829,23 @@ class CAccessibility implements PropertyChangeListener {
         }, c);
     }
 
+    private static int[] getTableSelectedInfo(final Accessible a, final Component c,
+                                              final int info) {
+        if (a == null) return null;
+        return invokeAndWait(() -> {
+            AccessibleContext ac = a.getAccessibleContext();
+            AccessibleTable table = ac.getAccessibleTable();
+            if (table != null) {
+                if (info == JAVA_AX_COLS) {
+                    return table.getSelectedAccessibleColumns();
+                } else if (info == JAVA_AX_ROWS) {
+                    return table.getSelectedAccessibleRows();
+                }
+            }
+            return null;
+        }, c);
+    }
+
     private static AccessibleRole getAccessibleRoleForLabel(JLabel l, AccessibleRole fallback) {
         String text = l.getText();
         if (text != null && text.length() > 0) {
@@ -868,4 +964,18 @@ class CAccessibility implements PropertyChangeListener {
             }
         }, (Component)ax);
     }
+
+    private static boolean isTreeRootVisible(Accessible a, Component c) {
+        if (a == null) return false;
+
+        return invokeAndWait(new Callable<Boolean>() {
+            public Boolean call() throws Exception {
+                Accessible sa = CAccessible.getSwingAccessible(a);
+                if (sa instanceof JTree) {
+                    return ((JTree) sa).isRootVisible();
+                }
+                return false;
+            }
+        }, c);
+    }
 }

src/java.desktop/macosx/classes/sun/lwawt/macosx/CAccessible.java

@@ -31,11 +31,7 @@ import java.beans.PropertyChangeListener;
 
 import javax.accessibility.Accessible;
 import javax.accessibility.AccessibleContext;
-import javax.swing.JProgressBar;
 import javax.swing.JTabbedPane;
-import javax.swing.JSlider;
-import javax.swing.event.ChangeEvent;
-import javax.swing.event.ChangeListener;
 
 import static javax.accessibility.AccessibleContext.ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY;
 import static javax.accessibility.AccessibleContext.ACCESSIBLE_CARET_PROPERTY;
@@ -75,6 +71,9 @@ class CAccessible extends CFRetainedResource implements Accessible {
     private static native void menuOpened(long ptr);
     private static native void menuClosed(long ptr);
     private static native void menuItemSelected(long ptr);
+    private static native void treeNodeExpanded(long ptr);
+    private static native void treeNodeCollapsed(long ptr);
+    private static native void selectedCellsChanged(long ptr);
 
     private Accessible accessible;
 
@@ -128,6 +127,19 @@ class CAccessible extends CFRetainedResource implements Accessible {
                 } else if (name.compareTo(ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY) == 0 ) {
                     if (newValue == null || newValue instanceof AccessibleContext) {
                         activeDescendant = (AccessibleContext)newValue;
+                        if (newValue instanceof Accessible) {
+                            Accessible a = (Accessible)newValue;
+                            AccessibleContext ac = a.getAccessibleContext();
+                            if (ac !=  null) {
+                                Accessible p = ac.getAccessibleParent();
+                                if (p != null) {
+                                    AccessibleContext pac = p.getAccessibleContext();
+                                    if ((pac != null) && (pac.getAccessibleRole() == AccessibleRole.TABLE)) {
+                                        selectedCellsChanged(ptr);
+                                    }
+                                }
+                            }
+                        }
                     }
                 } else if (name.compareTo(ACCESSIBLE_STATE_PROPERTY) == 0) {
                     AccessibleContext thisAC = accessible.getAccessibleContext();
@@ -137,6 +149,13 @@ class CAccessible extends CFRetainedResource implements Accessible {
                     if (parentAccessible != null) {
                         parentRole = parentAccessible.getAccessibleContext().getAccessibleRole();
                     }
+
+                    if (newValue == AccessibleState.EXPANDED) {
+                        treeNodeExpanded(ptr);
+                    } else if (newValue == AccessibleState.COLLAPSED) {
+                        treeNodeCollapsed(ptr);
+                    }
+
                     // At least for now don't handle combo box menu state changes.
                     // This may change when later fixing issues which currently
                     // exist for combo boxes, but for now the following is only

src/java.desktop/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java

@@ -422,15 +422,15 @@ public class CPlatformWindow extends CFRetainedResource implements PlatformWindo
 
     protected int getInitialStyleBits() {
         // defaults style bits
-        int styleBits = DECORATED | HAS_SHADOW | CLOSEABLE | MINIMIZABLE | ZOOMABLE | RESIZABLE | TITLE_VISIBLE;
+        int styleBits = DECORATED | HAS_SHADOW | CLOSEABLE | ZOOMABLE | RESIZABLE | TITLE_VISIBLE;
 
         styleBits |= getFocusableStyleBits();
 
         final boolean isFrame = (target instanceof Frame);
         final boolean isDialog = (target instanceof Dialog);
         final boolean isPopup = (target.getType() == Window.Type.POPUP);
-        if (isDialog) {
-            styleBits = SET(styleBits, MINIMIZABLE, false);
+        if (isFrame) {
+            styleBits = SET(styleBits, MINIMIZABLE, true);
         }
 
         // Either java.awt.Frame or java.awt.Dialog can be undecorated, however java.awt.Window always is undecorated.

src/java.desktop/macosx/native/libawt_lwawt/awt/AWTView.m

@@ -27,8 +27,7 @@
 #import "CGLGraphicsConfig.h"
 #import "AWTView.h"
 #import "AWTWindow.h"
-#import "JavaComponentAccessibility.h"
-#import "JavaTextAccessibility.h"
+#import "a11y/CommonComponentAccessibility.h"
 #import "JavaAccessibilityUtilities.h"
 #import "GeomUtilities.h"
 #import "ThreadUtilities.h"
@@ -698,42 +697,29 @@ extern bool isSystemShortcut_NextWindowInApplication(NSUInteger modifiersMask, N
 - (id)getAxData:(JNIEnv*)env
 {
     jobject jcomponent = [self awtComponent:env];
-    id ax = [[[JavaComponentAccessibility alloc] initWithParent:self withEnv:env withAccessible:jcomponent withIndex:-1 withView:self withJavaRole:nil] autorelease];
+    id ax = [[[CommonComponentAccessibility alloc] initWithParent:self withEnv:env withAccessible:jcomponent withIndex:-1 withView:self withJavaRole:nil] autorelease];
     (*env)->DeleteLocalRef(env, jcomponent);
     return ax;
 }
 
-- (NSArray *)accessibilityAttributeNames
-{
-    return [[super accessibilityAttributeNames] arrayByAddingObject:NSAccessibilityChildrenAttribute];
-}
-
 // NSAccessibility messages
-// attribute methods
-- (id)accessibilityAttributeValue:(NSString *)attribute
+- (id)accessibilityChildren
 {
     AWT_ASSERT_APPKIT_THREAD;
+    JNIEnv *env = [ThreadUtilities getJNIEnv];
 
-    if ([attribute isEqualToString:NSAccessibilityChildrenAttribute])
-    {
-        JNIEnv *env = [ThreadUtilities getJNIEnv];
+    (*env)->PushLocalFrame(env, 4);
 
-        (*env)->PushLocalFrame(env, 4);
+    id result = NSAccessibilityUnignoredChildrenForOnlyChild([self getAxData:env]);
 
-        id result = NSAccessibilityUnignoredChildrenForOnlyChild([self getAxData:env]);
+    (*env)->PopLocalFrame(env, NULL);
 
-        (*env)->PopLocalFrame(env, NULL);
-
-        return result;
-    }
-    else
-    {
-        return [super accessibilityAttributeValue:attribute];
-    }
+    return result;
 }
-- (BOOL)accessibilityIsIgnored
+
+- (BOOL)isAccessibilityElement
 {
-    return YES;
+    return NO;
 }
 
 - (id)accessibilityHitTest:(NSPoint)point
@@ -743,7 +729,7 @@ extern bool isSystemShortcut_NextWindowInApplication(NSUInteger modifiersMask, N
 
     (*env)->PushLocalFrame(env, 4);
 
-    id result = [[self getAxData:env] accessibilityHitTest:point withEnv:env];
+    id result = [[self getAxData:env] accessibilityHitTest:point];
 
     (*env)->PopLocalFrame(env, NULL);
 
@@ -768,17 +754,24 @@ extern bool isSystemShortcut_NextWindowInApplication(NSUInteger modifiersMask, N
 // --- Services menu support for lightweights ---
 
 // finds the focused accessible element, and if it is a text element, obtains the text from it
-- (NSString *)accessibleSelectedText
+- (NSString *)accessibilitySelectedText
 {
     id focused = [self accessibilityFocusedUIElement];
-    if (![focused isKindOfClass:[JavaTextAccessibility class]]) return nil;
-    return [(JavaTextAccessibility *)focused accessibilitySelectedTextAttribute];
+    if (![focused respondsToSelector:@selector(accessibilitySelectedText)]) return nil;
+    return [focused accessibilitySelectedText];
+}
+
+- (void)setAccessibilitySelectedText:(NSString *)accessibilitySelectedText {
+    id focused = [self accessibilityFocusedUIElement];
+    if ([focused respondsToSelector:@selector(setAccessibilitySelectedText:)]) {
+    [focused setAccessibilitySelectedText:accessibilitySelectedText];
+}
 }
 
 // same as above, but converts to RTFD
 - (NSData *)accessibleSelectedTextAsRTFD
 {
-    NSString *selectedText = [self accessibleSelectedText];
+    NSString *selectedText = [self accessibilitySelectedText];
     NSAttributedString *styledText = [[NSAttributedString alloc] initWithString:selectedText];
     NSData *rtfdData = [styledText RTFDFromRange:NSMakeRange(0, [styledText length])
                               documentAttributes:
@@ -791,8 +784,8 @@ extern bool isSystemShortcut_NextWindowInApplication(NSUInteger modifiersMask, N
 - (BOOL)replaceAccessibleTextSelection:(NSString *)text
 {
     id focused = [self accessibilityFocusedUIElement];
-    if (![focused isKindOfClass:[JavaTextAccessibility class]]) return NO;
-    [(JavaTextAccessibility *)focused accessibilitySetSelectedTextAttribute:text];
+    if (![focused respondsToSelector:@selector(setAccessibilitySelectedText)]) return NO;
+    [focused setAccessibilitySelectedText:text];
     return YES;
 }
 
@@ -802,7 +795,7 @@ extern bool isSystemShortcut_NextWindowInApplication(NSUInteger modifiersMask, N
     if ([[self window] firstResponder] != self) return nil; // let AWT components handle themselves
 
     if ([sendType isEqual:NSStringPboardType] || [returnType isEqual:NSStringPboardType]) {
-        NSString *selectedText = [self accessibleSelectedText];
+        NSString *selectedText = [self accessibilitySelectedText];
         if (selectedText) return self;
     }
 
@@ -815,7 +808,7 @@ extern bool isSystemShortcut_NextWindowInApplication(NSUInteger modifiersMask, N
     if ([types containsObject:NSStringPboardType])
     {
         [pboard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
-        return [pboard setString:[self accessibleSelectedText] forType:NSStringPboardType];
+        return [pboard setString:[self accessibilitySelectedText] forType:NSStringPboardType];
     }
 
     if ([types containsObject:NSRTFDPboardType])

src/java.desktop/macosx/native/libawt_lwawt/awt/AWTWindow.h

@@ -47,6 +47,8 @@
     NSRect standardFrame;
     BOOL isMinimizing;
     BOOL isJustCreated;
+    NSWindowTabbingMode javaWindowTabbingMode;
+    BOOL isEnterFullScreen;
 }
 
 // An instance of either AWTWindow_Normal or AWTWindow_Panel
@@ -63,6 +65,8 @@
 @property (nonatomic) NSRect standardFrame;
 @property (nonatomic) BOOL isMinimizing;
 @property (nonatomic) BOOL isJustCreated;
+@property (nonatomic) NSWindowTabbingMode javaWindowTabbingMode;
+@property (nonatomic) BOOL isEnterFullScreen;
 
 - (id) initWithPlatformWindow:(jobject)javaPlatformWindow
                   ownerWindow:owner
@@ -72,6 +76,8 @@
 
 - (BOOL) isTopmostWindowUnderMouse;
 
+- (NSWindowTabbingMode) getJavaWindowTabbingMode;
+
 // NSWindow overrides delegate methods
 - (BOOL) canBecomeKeyWindow;
 - (void) becomeKeyWindow;

src/java.desktop/macosx/native/libawt_lwawt/awt/AWTWindow.m

@@ -67,6 +67,8 @@ static AWTWindow* lastKeyWindow = nil;
 // It would be NSZeroPoint if 'Location by Platform' is not used.
 static NSPoint lastTopLeftPoint;
 
+static BOOL ignoreResizeWindowDuringAnotherWindowEnd = NO;
+
 // --------------------------------------------------------------
 // NSWindow/NSPanel descendants implementation
 #define AWT_NS_WINDOW_IMPLEMENTATION                            \
@@ -119,7 +121,7 @@ static NSPoint lastTopLeftPoint;
 }                                                               \
                                                                 \
 - (NSWindowTabbingMode)tabbingMode {                            \
-    return NSWindowTabbingModeDisallowed;                       \
+    return ((AWTWindow*)[self delegate]).javaWindowTabbingMode; \
 }
 
 @implementation AWTWindow_Normal
@@ -229,6 +231,69 @@ AWT_NS_WINDOW_IMPLEMENTATION
                     b:[event deltaY]];
 }
 
+- (void)moveTabToNewWindow:(id)sender {
+    AWT_ASSERT_APPKIT_THREAD;
+
+    [super moveTabToNewWindow:sender];
+
+    JNIEnv *env = [ThreadUtilities getJNIEnv];
+    jobject platformWindow = (*env)->NewLocalRef(env, ((AWTWindow *)self.delegate).javaPlatformWindow);
+    if (platformWindow != NULL) {
+        // extract the target AWT Window object out of the CPlatformWindow
+        GET_CPLATFORM_WINDOW_CLASS();
+        DECLARE_FIELD(jf_target, jc_CPlatformWindow, "target", "Ljava/awt/Window;");
+        jobject awtWindow = (*env)->GetObjectField(env, platformWindow, jf_target);
+        if (awtWindow != NULL) {
+            DECLARE_CLASS(jc_Window, "java/awt/Window");
+            DECLARE_METHOD(jm_runMoveTabToNewWindowCallback, jc_Window, "runMoveTabToNewWindowCallback", "()V");
+            (*env)->CallVoidMethod(env, awtWindow, jm_runMoveTabToNewWindowCallback);
+            CHECK_EXCEPTION();
+            (*env)->DeleteLocalRef(env, awtWindow);
+        }
+        (*env)->DeleteLocalRef(env, platformWindow);
+    }
+
+#ifdef DEBUG
+    NSLog(@"=== Move Tab to new Window ===");
+#endif
+}
+
+// Call over Foundation from Java
+- (CGFloat) getTabBarVisibleAndHeight {
+    if (@available(macOS 10.13, *)) {
+        id tabGroup = [self tabGroup];
+#ifdef DEBUG
+        NSLog(@"=== Window tabBar: %@ ===", tabGroup);
+#endif
+        if ([tabGroup isTabBarVisible]) {
+            if ([tabGroup respondsToSelector:@selector(_tabBar)]) { // private member
+                CGFloat height = [[tabGroup _tabBar] frame].size.height;
+#ifdef DEBUG
+                NSLog(@"=== Window tabBar visible: %f ===", height);
+#endif
+                return height;
+            }
+#ifdef DEBUG
+            NSLog(@"=== NsWindow.tabGroup._tabBar not found ===");
+#endif
+            return -1; // if we don't get height return -1 and use default value in java without change native code
+        }
+#ifdef DEBUG
+        NSLog(@"=== Window tabBar not visible ===");
+#endif
+    } else {
+#ifdef DEBUG
+        NSLog(@"=== Window tabGroup not supported before macOS 10.13 ===");
+#endif
+    }
+    return 0;
+}
+
+- (void)orderOut:(id)sender {
+    ignoreResizeWindowDuringAnotherWindowEnd = YES;
+    [super orderOut:sender];
+}
+
 @end
 @implementation AWTWindow_Panel
 AWT_NS_WINDOW_IMPLEMENTATION
@@ -251,6 +316,8 @@ AWT_NS_WINDOW_IMPLEMENTATION
 @synthesize standardFrame;
 @synthesize isMinimizing;
 @synthesize isJustCreated;
+@synthesize javaWindowTabbingMode;
+@synthesize isEnterFullScreen;
 
 - (void) updateMinMaxSize:(BOOL)resizable {
     if (resizable) {
@@ -401,6 +468,9 @@ AWT_ASSERT_APPKIT_THREAD;
 
     self.isJustCreated = YES;
 
+    self.javaWindowTabbingMode = [self getJavaWindowTabbingMode];
+    self.isEnterFullScreen = NO;
+
     return self;
 }
 
@@ -418,6 +488,35 @@ AWT_ASSERT_APPKIT_THREAD;
     return [self.nsWindow windowNumber] == [AWTWindow getTopmostWindowUnderMouseID];
 }
 
+- (NSWindowTabbingMode) getJavaWindowTabbingMode {
+    AWT_ASSERT_APPKIT_THREAD;
+
+    BOOL result = NO;
+
+    JNIEnv *env = [ThreadUtilities getJNIEnv];
+    jobject platformWindow = (*env)->NewLocalRef(env, self.javaPlatformWindow);
+    if (platformWindow != NULL) {
+        // extract the target AWT Window object out of the CPlatformWindow
+        GET_CPLATFORM_WINDOW_CLASS_RETURN(NSWindowTabbingModeDisallowed);
+        DECLARE_FIELD_RETURN(jf_target, jc_CPlatformWindow, "target", "Ljava/awt/Window;", NSWindowTabbingModeDisallowed);
+        jobject awtWindow = (*env)->GetObjectField(env, platformWindow, jf_target);
+        if (awtWindow != NULL) {
+            DECLARE_CLASS_RETURN(jc_Window, "java/awt/Window", NSWindowTabbingModeDisallowed);
+            DECLARE_METHOD_RETURN(jm_hasTabbingMode, jc_Window, "hasTabbingMode", "()Z", NSWindowTabbingModeDisallowed);
+            result = (*env)->CallBooleanMethod(env, awtWindow, jm_hasTabbingMode) == JNI_TRUE ? YES : NO;
+            CHECK_EXCEPTION();
+            (*env)->DeleteLocalRef(env, awtWindow);
+        }
+        (*env)->DeleteLocalRef(env, platformWindow);
+    }
+
+#ifdef DEBUG
+    NSLog(@"=== getJavaWindowTabbingMode: %d ===", result);
+#endif
+
+    return result ? NSWindowTabbingModeAutomatic : NSWindowTabbingModeDisallowed;
+}
+
 + (AWTWindow *) getTopmostWindowUnderMouse {
     NSEnumerator *windowEnumerator = [[NSApp windows] objectEnumerator];
     NSWindow *window;
@@ -635,6 +734,7 @@ AWT_ASSERT_APPKIT_THREAD;
     DECLARE_CLASS(jc_CCursorManager, "sun/lwawt/macosx/CCursorManager");
     DECLARE_STATIC_METHOD(sjm_resetCurrentCursor, jc_CCursorManager, "resetCurrentCursor", "()V");
     (*env)->CallStaticVoidMethod(env, jc_CCursorManager, sjm_resetCurrentCursor);
+    CHECK_EXCEPTION();
 }
 
 - (BOOL) canBecomeMainWindow {
@@ -696,6 +796,12 @@ AWT_ASSERT_APPKIT_THREAD;
 
 - (void)windowDidResize:(NSNotification *)notification {
 AWT_ASSERT_APPKIT_THREAD;
+    if (self.isEnterFullScreen && ignoreResizeWindowDuringAnotherWindowEnd) {
+#ifdef DEBUG
+        NSLog(@"=== Native.windowDidResize: %@ | ignored in transition to fullscreen ===", self.nsWindow.title);
+#endif
+        return;
+    }
 
     [self _deliverMoveResizeEvent];
 }
@@ -974,6 +1080,8 @@ AWT_ASSERT_APPKIT_THREAD;
 - (void)windowWillEnterFullScreen:(NSNotification *)notification {
     [self allowMovingChildrenBetweenSpaces:YES];
 
+    self.isEnterFullScreen = YES;
+
     JNIEnv *env = [ThreadUtilities getJNIEnv];
     GET_CPLATFORM_WINDOW_CLASS();
     DECLARE_METHOD(jm_windowWillEnterFullScreen, jc_CPlatformWindow, "windowWillEnterFullScreen", "()V");
@@ -987,6 +1095,8 @@ AWT_ASSERT_APPKIT_THREAD;
 }
 
 - (void)windowDidEnterFullScreen:(NSNotification *)notification {
+    self.isEnterFullScreen = YES;
+
     [self allowMovingChildrenBetweenSpaces:NO];
 
     JNIEnv *env = [ThreadUtilities getJNIEnv];
@@ -1003,6 +1113,8 @@ AWT_ASSERT_APPKIT_THREAD;
 }
 
 - (void)windowWillExitFullScreen:(NSNotification *)notification {
+    self.isEnterFullScreen = NO;
+
     JNIEnv *env = [ThreadUtilities getJNIEnv];
     GET_CPLATFORM_WINDOW_CLASS();
     DECLARE_METHOD(jm_windowWillExitFullScreen, jc_CPlatformWindow, "windowWillExitFullScreen", "()V");
@@ -1021,6 +1133,8 @@ AWT_ASSERT_APPKIT_THREAD;
 }
 
 - (void)windowDidExitFullScreen:(NSNotification *)notification {
+    self.isEnterFullScreen = NO;
+
     JNIEnv *env = [ThreadUtilities getJNIEnv];
     jobject platformWindow = (*env)->NewLocalRef(env, self.javaPlatformWindow);
     if (platformWindow != NULL) {
@@ -1796,6 +1910,8 @@ JNI_COCOA_ENTER(env);
         [nsWindow setDelegate: nil];
 
         [window release];
+
+        ignoreResizeWindowDuringAnotherWindowEnd = NO;
     }];
 
 JNI_COCOA_EXIT(env);

src/java.desktop/macosx/native/libawt_lwawt/awt/Dispatch.m

@@ -129,6 +129,7 @@ JNI_COCOA_ENTER(env);
             JNI_COCOA_ENTER(blockEnv);
                 // call the user's runnable
                 (*blockEnv)->CallVoidMethod(blockEnv, runnableRef, jm_run);
+                CHECK_EXCEPTION_IN_ENV(blockEnv);
                 (*blockEnv)->DeleteGlobalRef(blockEnv, runnableRef);
             JNI_COCOA_EXIT(blockEnv);
         });

src/java.desktop/macosx/native/libawt_lwawt/awt/JavaAccessibilityAction.h

@@ -26,6 +26,10 @@
 #import <AppKit/AppKit.h>
 #import <jni.h>
 
+extern NSMutableDictionary *sActions;
+extern NSMutableDictionary *sActionSelectors;
+extern NSMutableArray *sAllActionSelectors;
+void initializeActions();
 
 @protocol JavaAccessibilityAction
 

src/java.desktop/macosx/native/libawt_lwawt/awt/JavaAccessibilityAction.m

@@ -29,6 +29,10 @@
 #import "ThreadUtilities.h"
 #import "JNIUtilities.h"
 
+NSMutableDictionary *sActions = nil;
+NSMutableDictionary *sActionSelectors = nil;
+NSMutableArray *sAllActionSelectors = nil;
+void initializeActions();
 
 @implementation JavaAxAction
 
@@ -148,3 +152,31 @@
 }
 
 @end
+
+void initializeActions() {
+    int actionsCount = 5;
+
+    sActions = [[NSMutableDictionary alloc] initWithCapacity:actionsCount];
+
+    [sActions setObject:NSAccessibilityPressAction forKey:@"click"];
+    [sActions setObject:NSAccessibilityIncrementAction forKey:@"increment"];
+    [sActions setObject:NSAccessibilityDecrementAction forKey:@"decrement"];
+    [sActions setObject:NSAccessibilityShowMenuAction forKey:@"togglePopup"];
+    [sActions setObject:NSAccessibilityPressAction forKey:@"toggleExpand"];
+
+    sActionSelectors = [[NSMutableDictionary alloc] initWithCapacity:actionsCount];
+
+    [sActionSelectors setObject:NSStringFromSelector(@selector(accessibilityPerformPress)) forKey:NSAccessibilityPressAction];
+    [sActionSelectors setObject:NSStringFromSelector(@selector(accessibilityPerformShowMenu)) forKey:NSAccessibilityShowMenuAction];
+    [sActionSelectors setObject:NSStringFromSelector(@selector(accessibilityPerformDecrement)) forKey:NSAccessibilityDecrementAction];
+    [sActionSelectors setObject:NSStringFromSelector(@selector(accessibilityPerformIncrement)) forKey:NSAccessibilityIncrementAction];
+    [sActionSelectors setObject:NSStringFromSelector(@selector(accessibilityPerformPick)) forKey:NSAccessibilityPickAction];
+
+    sAllActionSelectors = [[NSMutableArray alloc] initWithCapacity:actionsCount];
+
+    [sAllActionSelectors addObject:NSStringFromSelector(@selector(accessibilityPerformPick))];
+    [sAllActionSelectors addObject:NSStringFromSelector(@selector(accessibilityPerformIncrement))];
+    [sAllActionSelectors addObject:NSStringFromSelector(@selector(accessibilityPerformDecrement))];
+    [sAllActionSelectors addObject:NSStringFromSelector(@selector(accessibilityPerformShowMenu))];
+    [sAllActionSelectors addObject:NSStringFromSelector(@selector(accessibilityPerformPress))];
+}

src/java.desktop/macosx/native/libawt_lwawt/awt/JavaAccessibilityUtilities.h

@@ -48,6 +48,7 @@ BOOL isVertical(JNIEnv *env, jobject axContext, jobject component);
 BOOL isHorizontal(JNIEnv *env, jobject axContext, jobject component);
 BOOL isShowing(JNIEnv *env, jobject axContext, jobject component);
 BOOL isSelectable(JNIEnv *env, jobject axContext, jobject component);
+BOOL isExpanded(JNIEnv *env, jobject axContext, jobject component);
 NSPoint getAxComponentLocationOnScreen(JNIEnv *env, jobject axComponent, jobject component);
 jint getAxTextCharCount(JNIEnv *env, jobject axText, jobject component);
 
@@ -60,3 +61,6 @@ void JavaAccessibilitySetAttributeValue(id element, NSString *attribute, id valu
 void JavaAccessibilityRaiseSetAttributeToIllegalTypeException(const char *functionName, id element, NSString *attribute, id value);
 void JavaAccessibilityRaiseUnimplementedAttributeException(const char *functionName, id element, NSString *attribute);
 void JavaAccessibilityRaiseIllegalParameterTypeException(const char *functionName, id element, NSString *attribute, id parameter);
+BOOL ObjectEquals(JNIEnv *env, jobject a, jobject b, jobject component);
+NSNumber* JavaNumberToNSNumber(JNIEnv *env, jobject jnumber);
+NSValue *javaIntArrayToNSRangeValue(JNIEnv* env, jintArray array);

src/java.desktop/macosx/native/libawt_lwawt/awt/JavaAccessibilityUtilities.m

@@ -27,6 +27,7 @@
 #import "JNIUtilities.h"
 
 #import <AppKit/AppKit.h>
+#import "ThreadUtilities.h"
 
 static BOOL JavaAccessibilityIsSupportedAttribute(id element, NSString *attribute);
 static void JavaAccessibilityLogError(NSString *message);
@@ -50,17 +51,21 @@ static jclass sjc_CAccessibility = NULL;
 
 NSSize getAxComponentSize(JNIEnv *env, jobject axComponent, jobject component)
 {
+    GET_CACCESSIBILITY_CLASS_RETURN(NSZeroSize);
     DECLARE_CLASS_RETURN(jc_Dimension, "java/awt/Dimension", NSZeroSize);
     DECLARE_FIELD_RETURN(jf_width, jc_Dimension, "width", "I", NSZeroSize);
     DECLARE_FIELD_RETURN(jf_height, jc_Dimension, "height", "I", NSZeroSize);
     DECLARE_STATIC_METHOD_RETURN(jm_getSize, sjc_CAccessibility, "getSize",
            "(Ljavax/accessibility/AccessibleComponent;Ljava/awt/Component;)Ljava/awt/Dimension;", NSZeroSize);
 
-    jobject dimension = (*env)->CallStaticObjectMethod(env, jc_Dimension, jm_getSize, axComponent, component);
+    jobject dimension = (*env)->CallStaticObjectMethod(env, sjc_CAccessibility, jm_getSize, axComponent, component);
     CHECK_EXCEPTION();
 
     if (dimension == NULL) return NSZeroSize;
-    return NSMakeSize((*env)->GetIntField(env, dimension, jf_width), (*env)->GetIntField(env, dimension, jf_height));
+
+    NSSize size = NSMakeSize((*env)->GetIntField(env, dimension, jf_width), (*env)->GetIntField(env, dimension, jf_height));
+    (*env)->DeleteLocalRef(env, dimension);
+    return size;
 }
 
 NSString *getJavaRole(JNIEnv *env, jobject axComponent, jobject component)
@@ -199,6 +204,20 @@ BOOL isSelectable(JNIEnv *env, jobject axContext, jobject component)
     return selectable;
 }
 
+BOOL isExpanded(JNIEnv *env, jobject axContext, jobject component)
+{
+    GET_ACCESSIBLESTATE_CLASS_RETURN(NO);
+    DECLARE_STATIC_FIELD_RETURN(jm_EXPANDED,
+                                    sjc_AccessibleState,
+                                    "EXPANDED",
+                                    "Ljavax/accessibility/AccessibleState;", NO );
+    jobject axExpandedState = (*env)->GetStaticObjectField(env, sjc_AccessibleState, jm_EXPANDED);
+    CHECK_EXCEPTION_NULL_RETURN(axExpandedState, NO);
+    BOOL expanded = containsAxState(env, axContext, axExpandedState, component);
+    (*env)->DeleteLocalRef(env, axExpandedState);
+    return expanded;
+}
+
 NSPoint getAxComponentLocationOnScreen(JNIEnv *env, jobject axComponent, jobject component)
 {
     GET_CACCESSIBILITY_CLASS_RETURN(NSZeroPoint);
@@ -211,7 +230,9 @@ NSPoint getAxComponentLocationOnScreen(JNIEnv *env, jobject axComponent, jobject
                       axComponent, component);
     CHECK_EXCEPTION();
     if (jpoint == NULL) return NSZeroPoint;
-    return NSMakePoint((*env)->GetIntField(env, jpoint, sjf_X), (*env)->GetIntField(env, jpoint, sjf_Y));
+    NSPoint p = NSMakePoint((*env)->GetIntField(env, jpoint, sjf_X), (*env)->GetIntField(env, jpoint, sjf_Y));
+    (*env)->DeleteLocalRef(env, jpoint);
+    return p;
 }
 
 jint getAxTextCharCount(JNIEnv *env, jobject axText, jobject component)
@@ -348,6 +369,75 @@ static void JavaAccessibilityLogError(NSString *message)
     NSLog(@"!!! %@", message);
 }
 
+/*
+ * Returns Object.equals for the two items
+ * This may use LWCToolkit.invokeAndWait(); don't call while holding fLock
+ * and try to pass a component so the event happens on the correct thread.
+ */
+BOOL ObjectEquals(JNIEnv *env, jobject a, jobject b, jobject component)
+{
+    DECLARE_CLASS_RETURN(sjc_Object, "java/lang/Object", NO);
+    DECLARE_METHOD_RETURN(jm_equals, sjc_Object, "equals", "(Ljava/lang/Object;)Z", NO);
+
+    if ((a == NULL) && (b == NULL)) return YES;
+    if ((a == NULL) || (b == NULL)) return NO;
+
+    if (pthread_main_np() != 0) {
+        // If we are on the AppKit thread
+        DECLARE_CLASS_RETURN(sjc_LWCToolkit, "sun/lwawt/macosx/LWCToolkit", NO);
+        DECLARE_STATIC_METHOD_RETURN(jm_doEquals, sjc_LWCToolkit, "doEquals",
+                                     "(Ljava/lang/Object;Ljava/lang/Object;Ljava/awt/Component;)Z", NO);
+        return (*env)->CallStaticBooleanMethod(env, sjc_LWCToolkit, jm_doEquals, a, b, component);
+        CHECK_EXCEPTION();
+    }
+
+    jboolean jb = (*env)->CallBooleanMethod(env, a, jm_equals, b);
+    CHECK_EXCEPTION();
+    return jb;
+}
+
+/*
+ * The java/lang/Number concrete class could be for any of the Java primitive
+ * numerical types or some other subclass.
+ * All existing A11Y code uses Integer so that is what we look for first
+ * But all must be able to return a double and NSNumber accepts a double,
+ * so that's the fall back.
+ */
+NSNumber* JavaNumberToNSNumber(JNIEnv *env, jobject jnumber) {
+    if (jnumber == NULL) {
+        return nil;
+    }
+    DECLARE_CLASS_RETURN(jnumber_Class, "java/lang/Number", nil);
+    DECLARE_CLASS_RETURN(jinteger_Class, "java/lang/Integer", nil);
+    DECLARE_METHOD_RETURN(jm_intValue, jnumber_Class, "intValue", "()I", nil);
+    DECLARE_METHOD_RETURN(jm_doubleValue, jnumber_Class, "doubleValue", "()D", nil);
+    if ((*env)->IsInstanceOf(env, jnumber, jinteger_Class)) {
+        jint i = (*env)->CallIntMethod(env, jnumber, jm_intValue);
+        CHECK_EXCEPTION();
+        return [NSNumber numberWithInteger:i];
+    } else {
+        jdouble d = (*env)->CallDoubleMethod(env, jnumber, jm_doubleValue);
+        CHECK_EXCEPTION();
+        return [NSNumber numberWithDouble:d];
+    }
+}
+
+/*
+ * Converts an int array to an NSRange wrapped inside an NSValue
+ * takes [start, end] values and returns [start, end - start]
+ */
+NSValue *javaIntArrayToNSRangeValue(JNIEnv* env, jintArray array) {
+    jint *values = (*env)->GetIntArrayElements(env, array, 0);
+    if (values == NULL) {
+        // Note: Java will not be on the stack here so a java exception can't happen and no need to call ExceptionCheck.
+        NSLog(@"%s failed calling GetIntArrayElements", __FUNCTION__);
+        return nil;
+    };
+    NSValue *value = [NSValue valueWithRange:NSMakeRange(values[0], values[1] - values[0])];
+    (*env)->ReleaseIntArrayElements(env, array, values, 0);
+    return value;
+}
+
 // end appKit copies
 
 /*
@@ -417,13 +507,13 @@ void initializeRoles()
     [sRoles setObject:NSAccessibilitySplitGroupRole forKey:@"splitpane"];
     [sRoles setObject:NSAccessibilityValueIndicatorRole forKey:@"statusbar"];
     [sRoles setObject:NSAccessibilityGroupRole forKey:@"swingcomponent"];
-    [sRoles setObject:NSAccessibilityGridRole forKey:@"table"];
+    [sRoles setObject:NSAccessibilityTableRole forKey:@"table"];
     [sRoles setObject:NSAccessibilityTextFieldRole forKey:@"text"];
     [sRoles setObject:NSAccessibilityTextAreaRole forKey:@"textarea"]; // supports top/bottom of document notifications: CAccessability.getAccessibleRole()
     [sRoles setObject:NSAccessibilityCheckBoxRole forKey:@"togglebutton"];
     [sRoles setObject:NSAccessibilityToolbarRole forKey:@"toolbar"];
     [sRoles setObject:JavaAccessibilityIgnore forKey:@"tooltip"];
-    [sRoles setObject:NSAccessibilityBrowserRole forKey:@"tree"];
+    [sRoles setObject:NSAccessibilityOutlineRole forKey:@"tree"];
     [sRoles setObject:NSAccessibilityUnknownRole forKey:@"unknown"];
     [sRoles setObject:JavaAccessibilityIgnore forKey:@"viewport"];
     [sRoles setObject:JavaAccessibilityIgnore forKey:@"window"];

src/java.desktop/macosx/native/libawt_lwawt/awt/JavaComponentAccessibility.m

@@ -29,7 +29,6 @@
 // <https://www.ibm.com/able/guidelines/java/snsjavagjfc.html>
 
 #import "JavaComponentAccessibility.h"
-#import "a11y/CommonComponentAccessibility.h"
 #import "sun_lwawt_macosx_CAccessibility.h"
 
 #import <AppKit/AppKit.h>
@@ -45,6 +44,12 @@
 #import "JNIUtilities.h"
 #import "AWTView.h"
 
+// these constants are duplicated in CAccessibility.java
+#define JAVA_AX_ALL_CHILDREN (-1)
+#define JAVA_AX_SELECTED_CHILDREN (-2)
+#define JAVA_AX_VISIBLE_CHILDREN (-3)
+// If the value is >=0, it's an index
+
 // GET* macros defined in JavaAccessibilityUtilities.h, so they can be shared.
 static jclass sjc_CAccessibility = NULL;
 
@@ -82,7 +87,7 @@ static jclass sjc_CAccessible = NULL;
 static NSMutableDictionary *sAttributeNamesForRoleCache = nil;
 static NSObject *sAttributeNamesLOCK = nil;
 
-@interface TabGroupAccessibility : JavaComponentAccessibility {
+@interface TabGroupLegacyAccessibility : JavaComponentAccessibility {
     NSInteger _numTabs;
 }
 
@@ -112,7 +117,7 @@ static NSObject *sAttributeNamesLOCK = nil;
 - (id)accessibilityValueAttribute;
 @end
 
-@interface TableAccessibility : JavaComponentAccessibility {
+@interface TableLegacyAccessibility : JavaComponentAccessibility {
 
 }
 - (NSArray *)initializeAttributeNamesWithEnv:(JNIEnv *)env;
@@ -362,21 +367,18 @@ static NSObject *sAttributeNamesLOCK = nil;
 
     // otherwise, create a new instance
     JavaComponentAccessibility *newChild = nil;
-    newChild = [CommonComponentAccessibility getComponentAccessibility:javaRole];
-    if (newChild == nil) {
-        if ([javaRole isEqualToString:@"pagetablist"]) {
-            newChild = [TabGroupAccessibility alloc];
-        } else if ([javaRole isEqualToString:@"table"]) {
-            newChild = [TableAccessibility alloc];
+    if ([javaRole isEqualToString:@"pagetablist"]) {
+        newChild = [TabGroupLegacyAccessibility alloc];
+    } else if ([javaRole isEqualToString:@"table"]) {
+        newChild = [TableLegacyAccessibility alloc];
+    } else {
+        NSString *nsRole = [sRoles objectForKey:javaRole];
+        if ([nsRole isEqualToString:NSAccessibilityStaticTextRole] ||
+            [nsRole isEqualToString:NSAccessibilityTextAreaRole] ||
+            [nsRole isEqualToString:NSAccessibilityTextFieldRole]) {
+            newChild = [JavaTextAccessibility alloc];
         } else {
-            NSString *nsRole = [sRoles objectForKey:javaRole];
-            if ([nsRole isEqualToString:NSAccessibilityStaticTextRole] ||
-                [nsRole isEqualToString:NSAccessibilityTextAreaRole] ||
-                [nsRole isEqualToString:NSAccessibilityTextFieldRole]) {
-                newChild = [JavaTextAccessibility alloc];
-            } else {
-                newChild = [JavaComponentAccessibility alloc];
-            }
+            newChild = [JavaComponentAccessibility alloc];
         }
     }
 
@@ -387,7 +389,7 @@ static NSObject *sAttributeNamesLOCK = nil;
     // This is the only way to know if the menu is opening; visible state change
     // can't be caught because the listeners are not set up in time.
     if ( [javaRole isEqualToString:@"popupmenu"] &&
-         ![[parent javaRole] isEqualToString:@"combobox"] ) {
+        ![[parent javaRole] isEqualToString:@"combobox"] ) {
         [newChild postMenuOpened];
     }
 
@@ -904,32 +906,6 @@ static NSObject *sAttributeNamesLOCK = nil;
     return index;
 }
 
-/*
- * The java/lang/Number concrete class could be for any of the Java primitive
- * numerical types or some other subclass.
- * All existing A11Y code uses Integer so that is what we look for first
- * But all must be able to return a double and NSNumber accepts a double,
- * so that's the fall back.
- */
-static NSNumber* JavaNumberToNSNumber(JNIEnv *env, jobject jnumber) {
-    if (jnumber == NULL) {
-        return nil;
-    }
-    DECLARE_CLASS_RETURN(jnumber_Class, "java/lang/Number", nil);
-    DECLARE_CLASS_RETURN(jinteger_Class, "java/lang/Integer", nil);
-    DECLARE_METHOD_RETURN(jm_intValue, jnumber_Class, "intValue", "()I", nil);
-    DECLARE_METHOD_RETURN(jm_doubleValue, jnumber_Class, "doubleValue", "()D", nil);
-    if ((*env)->IsInstanceOf(env, jnumber, jinteger_Class)) {
-        jint i = (*env)->CallIntMethod(env, jnumber, jm_intValue);
-        CHECK_EXCEPTION();
-        return [NSNumber numberWithInteger:i];
-    } else {
-        jdouble d = (*env)->CallDoubleMethod(env, jnumber, jm_doubleValue);
-        CHECK_EXCEPTION();
-        return [NSNumber numberWithDouble:d];
-    }
-}
-
 // Element's maximum value (id)
 - (id)accessibilityMaxValueAttribute
 {
@@ -1600,7 +1576,7 @@ JNI_COCOA_ENTER(env);
 JNI_COCOA_EXIT(env);
 }
 
-@implementation TabGroupAccessibility
+@implementation TabGroupLegacyAccessibility
 
 - (id)initWithParent:(NSObject *)parent withEnv:(JNIEnv *)env withAccessible:(jobject)accessible withIndex:(jint)index withView:(NSView *)view withJavaRole:(NSString *)javaRole
 {
@@ -1802,9 +1778,6 @@ JNI_COCOA_EXIT(env);
 
 @end
 
-
-static BOOL ObjectEquals(JNIEnv *env, jobject a, jobject b, jobject component);
-
 @implementation TabGroupControlAccessibility
 
 - (id)initWithParent:(NSObject *)parent withEnv:(JNIEnv *)env withAccessible:(jobject)accessible withIndex:(jint)index withTabGroup:(jobject)tabGroup withView:(NSView *)view withJavaRole:(NSString *)javaRole
@@ -1873,7 +1846,7 @@ static BOOL ObjectEquals(JNIEnv *env, jobject a, jobject b, jobject component);
 #define JAVA_AX_ROWS (1)
 #define JAVA_AX_COLS (2)
 
-@implementation TableAccessibility
+@implementation TableLegacyAccessibility
 
 - (NSArray *)initializeAttributeNamesWithEnv:(JNIEnv *)env
 {
@@ -1907,30 +1880,3 @@ static BOOL ObjectEquals(JNIEnv *env, jobject a, jobject b, jobject component);
     return [self getTableInfo:JAVA_AX_COLS];
 }
 @end
-
-/*
- * Returns Object.equals for the two items
- * This may use LWCToolkit.invokeAndWait(); don't call while holding fLock
- * and try to pass a component so the event happens on the correct thread.
- */
-static BOOL ObjectEquals(JNIEnv *env, jobject a, jobject b, jobject component)
-{
-    DECLARE_CLASS_RETURN(sjc_Object, "java/lang/Object", NO);
-    DECLARE_METHOD_RETURN(jm_equals, sjc_Object, "equals", "(Ljava/lang/Object;)Z", NO);
-
-    if ((a == NULL) && (b == NULL)) return YES;
-    if ((a == NULL) || (b == NULL)) return NO;
-
-    if (pthread_main_np() != 0) {
-        // If we are on the AppKit thread
-        DECLARE_CLASS_RETURN(sjc_LWCToolkit, "sun/lwawt/macosx/LWCToolkit", NO);
-        DECLARE_STATIC_METHOD_RETURN(jm_doEquals, sjc_LWCToolkit, "doEquals",
-                                     "(Ljava/lang/Object;Ljava/lang/Object;Ljava/awt/Component;)Z", NO);
-        return (*env)->CallStaticBooleanMethod(env, sjc_LWCToolkit, jm_doEquals, a, b, component);
-        CHECK_EXCEPTION();
-    }
-
-    jboolean jb = (*env)->CallBooleanMethod(env, a, jm_equals, b);
-    CHECK_EXCEPTION();
-    return jb;
-}

src/java.desktop/macosx/native/libawt_lwawt/awt/JavaTextAccessibility.m

@@ -53,23 +53,6 @@ static jmethodID sjm_getAccessibleEditableText = NULL;
     GET_STATIC_METHOD_RETURN(sjm_getAccessibleEditableText, sjc_CAccessibleText, "getAccessibleEditableText", \
               "(Ljavax/accessibility/Accessible;Ljava/awt/Component;)Ljavax/accessibility/AccessibleEditableText;", ret);
 
-
-/*
- * Converts an int array to an NSRange wrapped inside an NSValue
- * takes [start, end] values and returns [start, end - start]
- */
-NSValue *javaIntArrayToNSRangeValue(JNIEnv* env, jintArray array) {
-    jint *values = (*env)->GetIntArrayElements(env, array, 0);
-    if (values == NULL) {
-        // Note: Java will not be on the stack here so a java exception can't happen and no need to call ExceptionCheck.
-        NSLog(@"%s failed calling GetIntArrayElements", __FUNCTION__);
-        return nil;
-    };
-    NSValue *value = [NSValue valueWithRange:NSMakeRange(values[0], values[1] - values[0])];
-    (*env)->ReleaseIntArrayElements(env, array, values, 0);
-    return value;
-}
-
 @implementation JavaTextAccessibility
 
 // based strongly upon NSTextViewAccessibility:accessibilityAttributeNames

src/java.desktop/macosx/native/libawt_lwawt/awt/a11y/ButtonAccessibility.m

@@ -36,7 +36,7 @@
 
 - (NSString * _Nullable)accessibilityLabel
 {
-    return [self accessibilityTitleAttribute];
+    return [super accessibilityLabel];
 }
 
 - (BOOL)accessibilityPerformPress
@@ -44,4 +44,14 @@
     return [self performAccessibleAction:0];
 }
 
+- (NSRect)accessibilityFrame
+{
+    return [super accessibilityFrame];
+}
+
+- (id)accessibilityParent
+{
+    return [super accessibilityParent];
+}
+
 @end