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6700789: G1: Enable use of compressed oops with G1 heaps

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Modifications to G1 so as to allow the use of compressed oops.

Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp
This commit is contained in:
Y. Srinivas Ramakrishna 2009-07-14 15:40:39 -07:00
parent 50d7db1805
commit 075c1335cb
58 changed files with 1233 additions and 1175 deletions
Download patch file Download diff file Expand all files Collapse all files

15
hotspot/src/share/vm/oops/instanceRefKlass.cpp
View file

@ -28,13 +28,14 @@
template <class T>
static void specialized_oop_follow_contents(instanceRefKlass* ref, oop obj) {
T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj);
oop referent = oopDesc::load_decode_heap_oop(referent_addr);
T heap_oop = oopDesc::load_heap_oop(referent_addr);
debug_only(
if(TraceReferenceGC && PrintGCDetails) {
gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj);
}
)
if (referent != NULL) {
if (!oopDesc::is_null(heap_oop)) {
oop referent = oopDesc::decode_heap_oop_not_null(heap_oop);
if (!referent->is_gc_marked() &&
MarkSweep::ref_processor()->
discover_reference(obj, ref->reference_type())) {
@ -81,13 +82,14 @@ static void specialized_oop_follow_contents(instanceRefKlass* ref,
ParCompactionManager* cm,
oop obj) {
T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj);
oop referent = oopDesc::load_decode_heap_oop(referent_addr);
T heap_oop = oopDesc::load_heap_oop(referent_addr);
debug_only(
if(TraceReferenceGC && PrintGCDetails) {
gclog_or_tty->print_cr("instanceRefKlass::oop_follow_contents " INTPTR_FORMAT, obj);
}
)
if (referent != NULL) {
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, ref->reference_type())) {
@ -182,9 +184,10 @@ int instanceRefKlass::oop_adjust_pointers(oop obj) {
} \
\
T* referent_addr = (T*)java_lang_ref_Reference::referent_addr(obj); \
oop referent = oopDesc::load_decode_heap_oop(referent_addr); \
if (referent != NULL && contains(referent_addr)) { \
T heap_oop = oopDesc::load_heap_oop(referent_addr); \
if (!oopDesc::is_null(heap_oop) && contains(referent_addr)) { \
ReferenceProcessor* rp = closure->_ref_processor; \
oop referent = oopDesc::decode_heap_oop_not_null(heap_oop); \
if (!referent->is_gc_marked() && (rp != NULL) && \
rp->discover_reference(obj, reference_type())) { \
return size; \