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6711316: Open source the Garbage-First garbage collector

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First mercurial integration of the code for the Garbage-First garbage collector.

Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
This commit is contained in:
Y. Srinivas Ramakrishna 2008-06-05 15:57:56 -07:00
parent 39463bb3fc
commit 18f3386a98
215 changed files with 36088 additions and 1249 deletions
Download patch file Download diff file Expand all files Collapse all files

34
hotspot/src/share/vm/memory/cardTableRS.cpp
View file

@ -27,10 +27,25 @@
CardTableRS::CardTableRS(MemRegion whole_heap,
int max_covered_regions) :
GenRemSet(&_ct_bs),
_ct_bs(whole_heap, max_covered_regions),
_cur_youngergen_card_val(youngergenP1_card)
GenRemSet(),
_cur_youngergen_card_val(youngergenP1_card),
_regions_to_iterate(max_covered_regions - 1)
{
#ifndef SERIALGC
if (UseG1GC) {
if (G1RSBarrierUseQueue) {
_ct_bs = new G1SATBCardTableLoggingModRefBS(whole_heap,
max_covered_regions);
} else {
_ct_bs = new G1SATBCardTableModRefBS(whole_heap, max_covered_regions);
}
} else {
_ct_bs = new CardTableModRefBSForCTRS(whole_heap, max_covered_regions);
}
#else
_ct_bs = new CardTableModRefBSForCTRS(whole_heap, max_covered_regions);
#endif
set_bs(_ct_bs);
_last_cur_val_in_gen = new jbyte[GenCollectedHeap::max_gens + 1];
if (_last_cur_val_in_gen == NULL) {
vm_exit_during_initialization("Could not last_cur_val_in_gen array.");
@ -38,20 +53,19 @@ CardTableRS::CardTableRS(MemRegion whole_heap,
for (int i = 0; i < GenCollectedHeap::max_gens + 1; i++) {
_last_cur_val_in_gen[i] = clean_card_val();
}
_ct_bs.set_CTRS(this);
_ct_bs->set_CTRS(this);
}
void CardTableRS::resize_covered_region(MemRegion new_region) {
_ct_bs.resize_covered_region(new_region);
_ct_bs->resize_covered_region(new_region);
}
jbyte CardTableRS::find_unused_youngergenP_card_value() {
GenCollectedHeap* gch = GenCollectedHeap::heap();
for (jbyte v = youngergenP1_card;
v < cur_youngergen_and_prev_nonclean_card;
v++) {
bool seen = false;
for (int g = 0; g < gch->n_gens()+1; g++) {
for (int g = 0; g < _regions_to_iterate; g++) {
if (_last_cur_val_in_gen[g] == v) {
seen = true;
break;
@ -221,11 +235,11 @@ void CardTableRS::write_ref_field_gc_par(void* field, oop new_val) {
void CardTableRS::younger_refs_in_space_iterate(Space* sp,
OopsInGenClosure* cl) {
DirtyCardToOopClosure* dcto_cl = sp->new_dcto_cl(cl, _ct_bs.precision(),
DirtyCardToOopClosure* dcto_cl = sp->new_dcto_cl(cl, _ct_bs->precision(),
cl->gen_boundary());
ClearNoncleanCardWrapper clear_cl(dcto_cl, this);
_ct_bs.non_clean_card_iterate(sp, sp->used_region_at_save_marks(),
_ct_bs->non_clean_card_iterate(sp, sp->used_region_at_save_marks(),
dcto_cl, &clear_cl, false);
}
@ -549,7 +563,7 @@ void CardTableRS::verify() {
if (ch->kind() == CollectedHeap::GenCollectedHeap) {
GenCollectedHeap::heap()->generation_iterate(&blk, false);
_ct_bs.verify();
_ct_bs->verify();
// If the old gen collections also collect perm, then we are only
// interested in perm-to-young pointers, not perm-to-old pointers.