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src/share/vm/gc_implementation/parallelScavenge/psCompactionManager.cpp
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*** 28,38 ****
#include "gc_implementation/parallelScavenge/objectStartArray.hpp"
#include "gc_implementation/parallelScavenge/parMarkBitMap.hpp"
#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
#include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp"
#include "gc_implementation/parallelScavenge/psOldGen.hpp"
! #include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
#include "oops/objArrayKlass.inline.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/atomic.inline.hpp"
#include "utilities/stack.inline.hpp"
--- 28,41 ----
#include "gc_implementation/parallelScavenge/objectStartArray.hpp"
#include "gc_implementation/parallelScavenge/parMarkBitMap.hpp"
#include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
#include "gc_implementation/parallelScavenge/psCompactionManager.inline.hpp"
#include "gc_implementation/parallelScavenge/psOldGen.hpp"
! #include "gc_implementation/parallelScavenge/psParallelCompact.inline.hpp"
! #include "memory/iterator.inline.hpp"
! #include "oops/instanceKlass.inline.hpp"
! #include "oops/instanceMirrorKlass.inline.hpp"
#include "oops/objArrayKlass.inline.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/atomic.inline.hpp"
#include "utilities/stack.inline.hpp"
*** 172,181 ****
--- 175,320 ----
assert(index >= 0 && index < (int)ParallelGCThreads, "index out of range");
assert(_manager_array != NULL, "Sanity");
return _manager_array[index];
}
+ void InstanceKlass::oop_pc_follow_contents(oop obj, ParCompactionManager* cm) {
+ assert(obj != NULL, "can't follow the content of NULL object");
+
+ PSParallelCompact::follow_klass(cm, obj->klass());
+ // Only mark the header and let the scan of the meta-data mark
+ // everything else.
+
+ PSParallelCompact::MarkAndPushClosure cl(cm);
+ InstanceKlass::oop_oop_iterate_oop_maps<true>(obj, &cl);
+ }
+
+ void InstanceMirrorKlass::oop_pc_follow_contents(oop obj, ParCompactionManager* cm) {
+ InstanceKlass::oop_pc_follow_contents(obj, cm);
+
+ // Follow the klass field in the mirror.
+ Klass* klass = java_lang_Class::as_Klass(obj);
+ if (klass != NULL) {
+ // An anonymous class doesn't have its own class loader, so the call
+ // to follow_klass will mark and push its java mirror instead of the
+ // class loader. When handling the java mirror for an anonymous class
+ // we need to make sure its class loader data is claimed, this is done
+ // by calling follow_class_loader explicitly. For non-anonymous classes
+ // the call to follow_class_loader is made when the class loader itself
+ // is handled.
+ if (klass->oop_is_instance() && InstanceKlass::cast(klass)->is_anonymous()) {
+ PSParallelCompact::follow_class_loader(cm, klass->class_loader_data());
+ } else {
+ PSParallelCompact::follow_klass(cm, klass);
+ }
+ } else {
+ // If klass is NULL then this a mirror for a primitive type.
+ // We don't have to follow them, since they are handled as strong
+ // roots in Universe::oops_do.
+ assert(java_lang_Class::is_primitive(obj), "Sanity check");
+ }
+
+ PSParallelCompact::MarkAndPushClosure cl(cm);
+ oop_oop_iterate_statics<true>(obj, &cl);
+ }
+
+ void InstanceClassLoaderKlass::oop_pc_follow_contents(oop obj, ParCompactionManager* cm) {
+ InstanceKlass::oop_pc_follow_contents(obj, cm);
+
+ ClassLoaderData * const loader_data = java_lang_ClassLoader::loader_data(obj);
+ if (loader_data != NULL) {
+ PSParallelCompact::follow_class_loader(cm, loader_data);
+ }
+ }
+
+ template <class T>
+ static void oop_pc_follow_contents_specialized(InstanceRefKlass* klass, oop obj, ParCompactionManager* cm) {
+ T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj);
+ T heap_oop = oopDesc::load_heap_oop(referent_addr);
+ debug_only(
+ if(TraceReferenceGC && PrintGCDetails) {
+ gclog_or_tty->print_cr("InstanceRefKlass::oop_pc_follow_contents " PTR_FORMAT, p2i(obj));
+ }
+ )
+ if (!oopDesc::is_null(heap_oop)) {
+ oop referent = oopDesc::decode_heap_oop_not_null(heap_oop);
+ if (PSParallelCompact::mark_bitmap()->is_unmarked(referent) &&
+ PSParallelCompact::ref_processor()->discover_reference(obj, klass->reference_type())) {
+ // reference already enqueued, referent will be traversed later
+ klass->InstanceKlass::oop_pc_follow_contents(obj, cm);
+ debug_only(
+ if(TraceReferenceGC && PrintGCDetails) {
+ gclog_or_tty->print_cr(" Non NULL enqueued " PTR_FORMAT, p2i(obj));
+ }
+ )
+ return;
+ } else {
+ // treat referent as normal oop
+ debug_only(
+ if(TraceReferenceGC && PrintGCDetails) {
+ gclog_or_tty->print_cr(" Non NULL normal " PTR_FORMAT, p2i(obj));
+ }
+ )
+ PSParallelCompact::mark_and_push(cm, referent_addr);
+ }
+ }
+ T* next_addr = (T*)java_lang_ref_Reference::next_addr(obj);
+ if (ReferenceProcessor::pending_list_uses_discovered_field()) {
+ // Treat discovered as normal oop, if ref is not "active",
+ // i.e. if next is non-NULL.
+ T next_oop = oopDesc::load_heap_oop(next_addr);
+ if (!oopDesc::is_null(next_oop)) { // i.e. ref is not "active"
+ T* discovered_addr = (T*)java_lang_ref_Reference::discovered_addr(obj);
+ debug_only(
+ if(TraceReferenceGC && PrintGCDetails) {
+ gclog_or_tty->print_cr(" Process discovered as normal "
+ PTR_FORMAT, p2i(discovered_addr));
+ }
+ )
+ PSParallelCompact::mark_and_push(cm, discovered_addr);
+ }
+ } else {
+ #ifdef ASSERT
+ // In the case of older JDKs which do not use the discovered
+ // field for the pending list, an inactive ref (next != NULL)
+ // must always have a NULL discovered field.
+ T next = oopDesc::load_heap_oop(next_addr);
+ oop discovered = java_lang_ref_Reference::discovered(obj);
+ assert(oopDesc::is_null(next) || oopDesc::is_null(discovered),
+ err_msg("Found an inactive reference " PTR_FORMAT " with a non-NULL discovered field",
+ p2i(obj)));
+ #endif
+ }
+ PSParallelCompact::mark_and_push(cm, next_addr);
+ klass->InstanceKlass::oop_pc_follow_contents(obj, cm);
+ }
+
+
+ void InstanceRefKlass::oop_pc_follow_contents(oop obj, ParCompactionManager* cm) {
+ if (UseCompressedOops) {
+ oop_pc_follow_contents_specialized<narrowOop>(this, obj, cm);
+ } else {
+ oop_pc_follow_contents_specialized<oop>(this, obj, cm);
+ }
+ }
+
+ void ObjArrayKlass::oop_pc_follow_contents(oop obj, ParCompactionManager* cm) {
+ PSParallelCompact::follow_klass(cm, this);
+
+ if (UseCompressedOops) {
+ oop_pc_follow_contents_specialized<narrowOop>(this, obj, 0, cm);
+ } else {
+ oop_pc_follow_contents_specialized<oop>(this, obj, 0, cm);
+ }
+ }
+
+ void TypeArrayKlass::oop_pc_follow_contents(oop obj, ParCompactionManager* cm) {
+ assert(obj->is_typeArray(),"must be a type array");
+ // Performance tweak: We skip iterating over the klass pointer since we
+ // know that Universe::TypeArrayKlass never moves.
+ }
+
void ParCompactionManager::follow_marking_stacks() {
do {
// Drain the overflow stack first, to allow stealing from the marking stack.
oop obj;
while (marking_stack()->pop_overflow(obj)) {
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