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6863023: need non-perm oops in code cache for JSR 292

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Make a special root-list for those few nmethods which might contain non-perm oops.

Reviewed-by: twisti, kvn, never, jmasa, ysr
This commit is contained in:
John R Rose 2009-09-15 21:53:47 -07:00
parent 1cf5b7ae11
commit e261aecad8
74 changed files with 979 additions and 279 deletions
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13
hotspot/src/share/vm/gc_implementation/parallelScavenge/pcTasks.cpp
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@ -39,12 +39,13 @@ void ThreadRootsMarkingTask::do_it(GCTaskManager* manager, uint which) {
ParCompactionManager* cm =
ParCompactionManager::gc_thread_compaction_manager(which);
PSParallelCompact::MarkAndPushClosure mark_and_push_closure(cm);
CodeBlobToOopClosure mark_and_push_in_blobs(&mark_and_push_closure, /*do_marking=*/ true);
if (_java_thread != NULL)
_java_thread->oops_do(&mark_and_push_closure);
_java_thread->oops_do(&mark_and_push_closure, &mark_and_push_in_blobs);
if (_vm_thread != NULL)
_vm_thread->oops_do(&mark_and_push_closure);
_vm_thread->oops_do(&mark_and_push_closure, &mark_and_push_in_blobs);
// Do the real work
cm->drain_marking_stacks(&mark_and_push_closure);
@ -79,7 +80,8 @@ void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {
case threads:
{
ResourceMark rm;
Threads::oops_do(&mark_and_push_closure);
CodeBlobToOopClosure each_active_code_blob(&mark_and_push_closure, /*do_marking=*/ true);
Threads::oops_do(&mark_and_push_closure, &each_active_code_blob);
}
break;
@ -107,6 +109,11 @@ void MarkFromRootsTask::do_it(GCTaskManager* manager, uint which) {
vmSymbols::oops_do(&mark_and_push_closure);
break;
case code_cache:
// Do not treat nmethods as strong roots for mark/sweep, since we can unload them.
//CodeCache::scavenge_root_nmethods_do(CodeBlobToOopClosure(&mark_and_push_closure));
break;
default:
fatal("Unknown root type");
}