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8186777: Make Klass::_java_mirror an OopHandle

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Add indirection for fetching mirror so that GC doesn't have to follow CLD::_klasses

Co-authored-by: Rickard Backman <rickard.backman@oracle.com>
Reviewed-by: hseigel, thartmann, eosterlund, stefank
This commit is contained in:
Coleen Phillimore 2017-10-03 16:42:04 -04:00
parent e31bc5637a
commit 73a801bc43
61 changed files with 383 additions and 477 deletions
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8
src/hotspot/share/gc/parallel/psParallelCompact.cpp
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@ -838,11 +838,6 @@ PSParallelCompact::IsAliveClosure PSParallelCompact::_is_alive_closure;
bool PSParallelCompact::IsAliveClosure::do_object_b(oop p) { return mark_bitmap()->is_marked(p); }
void PSParallelCompact::AdjustKlassClosure::do_klass(Klass* klass) {
PSParallelCompact::AdjustPointerClosure closure(_cm);
klass->oops_do(&closure);
}
void PSParallelCompact::post_initialize() {
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
MemRegion mr = heap->reserved_region();
@ -2162,7 +2157,6 @@ void PSParallelCompact::adjust_roots(ParCompactionManager* cm) {
ClassLoaderDataGraph::clear_claimed_marks();
PSParallelCompact::AdjustPointerClosure oop_closure(cm);
PSParallelCompact::AdjustKlassClosure klass_closure(cm);
// General strong roots.
Universe::oops_do(&oop_closure);
@ -2172,7 +2166,7 @@ void PSParallelCompact::adjust_roots(ParCompactionManager* cm) {
Management::oops_do(&oop_closure);
JvmtiExport::oops_do(&oop_closure);
SystemDictionary::oops_do(&oop_closure);
ClassLoaderDataGraph::oops_do(&oop_closure, &klass_closure, true);
ClassLoaderDataGraph::oops_do(&oop_closure, true);
// Now adjust pointers in remaining weak roots. (All of which should
// have been cleared if they pointed to non-surviving objects.)