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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes

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Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv

Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
This commit is contained in:
Coleen Phillimore 2008-04-13 17:43:42 -04:00
parent 680ecf1611
commit 4a831d45f0
273 changed files with 6585 additions and 2993 deletions
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42
hotspot/src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp
View file

@ -22,28 +22,33 @@
*
*/
inline void PSScavenge::save_to_space_top_before_gc() {
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
_to_space_top_before_gc = heap->young_gen()->to_space()->top();
}
inline bool PSScavenge::should_scavenge(oop p) {
return p == NULL ? false : PSScavenge::is_obj_in_young((HeapWord*) p);
template <class T> inline bool PSScavenge::should_scavenge(T* p) {
T heap_oop = oopDesc::load_heap_oop(p);
if (oopDesc::is_null(heap_oop)) return false;
oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
return PSScavenge::is_obj_in_young((HeapWord*)obj);
}
inline bool PSScavenge::should_scavenge(oop p, MutableSpace* to_space) {
template <class T>
inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) {
if (should_scavenge(p)) {
oop obj = oopDesc::load_decode_heap_oop_not_null(p);
// Skip objects copied to to_space since the scavenge started.
HeapWord* const addr = (HeapWord*) p;
HeapWord* const addr = (HeapWord*)obj;
return addr < to_space_top_before_gc() || addr >= to_space->end();
}
return false;
}
inline bool PSScavenge::should_scavenge(oop p, bool check_to_space) {
template <class T>
inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) {
if (check_to_space) {
ParallelScavengeHeap* heap = (ParallelScavengeHeap*) Universe::heap();
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
return should_scavenge(p, heap->young_gen()->to_space());
}
return should_scavenge(p);
@ -52,24 +57,23 @@ inline bool PSScavenge::should_scavenge(oop p, bool check_to_space) {
// Attempt to "claim" oop at p via CAS, push the new obj if successful
// This version tests the oop* to make sure it is within the heap before
// attempting marking.
template <class T>
inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm,
oop* p) {
assert(should_scavenge(*p, true), "revisiting object?");
T* p) {
assert(should_scavenge(p, true), "revisiting object?");
oop o = *p;
if (o->is_forwarded()) {
*p = o->forwardee();
} else {
*p = pm->copy_to_survivor_space(o, pm->depth_first());
}
oop o = oopDesc::load_decode_heap_oop_not_null(p);
oop new_obj = o->is_forwarded()
? o->forwardee()
: pm->copy_to_survivor_space(o, pm->depth_first());
oopDesc::encode_store_heap_oop_not_null(p, new_obj);
// We cannot mark without test, as some code passes us pointers
// that are outside the heap.
if ((!PSScavenge::is_obj_in_young((HeapWord*) p)) &&
if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) &&
Universe::heap()->is_in_reserved(p)) {
o = *p;
if (PSScavenge::is_obj_in_young((HeapWord*) o)) {
card_table()->inline_write_ref_field_gc(p, o);
if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) {
card_table()->inline_write_ref_field_gc(p, new_obj);
}
}
}