JBR-3542 Fix -Xcheck:jni warnings

Fixes warnings coming from JBR-specific code in addition to those fixed
by 8269223.

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

@@ -592,6 +592,7 @@ 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 {

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/libosxapp/JNIUtilities.h

@@ -183,23 +183,25 @@
  * or maybe a way for the app to continue running depending on the exact
  * nature of the problem that has been detected and how survivable it is.
  */
-#define CHECK_EXCEPTION() \
-    if ((*env)->ExceptionOccurred(env) != NULL) { \
+#define CHECK_EXCEPTION_IN_ENV(env) \
+    if ((*(env))->ExceptionOccurred(env) != NULL) { \
         if ([NSThread isMainThread] == YES) { \
             if (getenv("JNU_APPKIT_TRACE")) { \
-                (*env)->ExceptionDescribe(env); \
+                (*(env))->ExceptionDescribe(env); \
                 NSLog(@"%@",[NSThread callStackSymbols]); \
               } else { \
-                  (*env)->ExceptionClear(env); \
+                  (*(env))->ExceptionClear(env); \
               } \
          }  \
         if (getenv("JNU_NO_COCOA_EXCEPTION") == NULL) { \
             [NSException raise:NSGenericException format:@"Java Exception"]; \
         } else { \
-            (*env)->ExceptionClear(env); \
+            (*(env))->ExceptionClear(env); \
         } \
     };
 
+#define CHECK_EXCEPTION() CHECK_EXCEPTION_IN_ENV(env)
+
 #define CHECK_EXCEPTION_NULL_RETURN(x, y) \
     CHECK_EXCEPTION(); \
     if ((x) == NULL) { \

src/java.desktop/share/native/libfontmanager/freetypeScaler.c

@@ -349,6 +349,11 @@ static int getScreenResolution(JNIEnv *env) {
     jthrowable exc;
     jclass tk = (*env)->CallStaticObjectMethod(
         env, tkClass, getDefaultToolkitMID);
+    exc = (*env)->ExceptionOccurred(env);
+    if (exc) {
+        (*env)->ExceptionClear(env);
+        return DEFAULT_DPI;
+    }
     int dpi = (*env)->CallIntMethod(env, tk, getScreenResolutionMID);
 
     /* Test if there is no exception here (can get java.awt.HeadlessException)