8334598: Default classlist in JDK is not deterministic after JDK-8293980

Reviewed-by: ccheung, dholmes, stuefe, erikj

Author: iklam

Diff for: make/GenerateLinkOptData.gmk

@@ -62,14 +62,14 @@ ifeq ($(EXTERNAL_BUILDJDK), true)
   INTERIM_IMAGE_DIR := $(BUILD_JDK)
 endif
 
-# These are needed for deterministic classlist:
+# To make the classlist deterministic:
 # - The classlist can be influenced by locale. Always set it to en/US.
-# - Run with -Xint, as the compiler can speculatively resolve constant pool entries.
-# - ForkJoinPool parallelism can cause constant pool resolution to be non-deterministic.
+# - Concurrency in the core libraries can cause constant pool resolution
+#   to be non-deterministic. Since the benefits of resolved CP references in the
+#   default classlist is minimal, let's filter out the '@cp' lines until we can
+#   find a proper solution.
 CLASSLIST_FILE_VM_OPTS = \
-    -Duser.language=en -Duser.country=US \
-    -Xint \
-    -Djava.util.concurrent.ForkJoinPool.common.parallelism=0
+    -Duser.language=en -Duser.country=US
 
 # Save the stderr output of the command and print it along with stdout in case
 # something goes wrong.
@@ -101,9 +101,10 @@ $(CLASSLIST_FILE): $(INTERIM_IMAGE_DIR)/bin/java$(EXECUTABLE_SUFFIX) $(CLASSLIST
 	        exit $$exitcode \
 	    )
 	$(GREP) -v HelloClasslist [email protected] > [email protected]
+	$(GREP) -v @cp [email protected] > [email protected]
 	$(FIXPATH) $(INTERIM_IMAGE_DIR)/bin/java \
 	    -cp $(SUPPORT_OUTPUTDIR)/classlist.jar \
-	    build.tools.classlist.SortClasslist [email protected].3 > $@
+	    build.tools.classlist.SortClasslist [email protected].4 > $@
 
 # The jli trace is created by the same recipe as classlist. By declaring these
 # dependencies, make will correctly rebuild both jli trace and classlist