void HeapRegion::hr_clear(bool par, bool clear_space) {
_humongous_type = NotHumongous;
_humongous_start_region = NULL;
_in_collection_set = false;
_is_gc_alloc_region = false;
// Age stuff (if parallel, this will be done separately, since it needs
// to be sequential).
G1CollectedHeap* g1h = G1CollectedHeap::heap();
set_young_index_in_cset(-1);
uninstall_surv_rate_group();
set_young_type(NotYoung);
// In case it had been the start of a humongous sequence, reset its end.
set_end(_orig_end);
if (!par) {
// If this is parallel, this will be done later.
HeapRegionRemSet* hrrs = rem_set();
if (hrrs != NULL) hrrs->clear();
_claimed = InitialClaimValue;
}
zero_marked_bytes();
set_sort_index(-1);
_offsets.resize(HeapRegion::GrainWords);
init_top_at_mark_start();
if (clear_space) clear(SpaceDecorator::Mangle);
}
void HeapRegion::hr_clear(bool par, bool clear_space, bool locked) {
assert(_humongous_type == NotHumongous,
"we should have already filtered out humongous regions");
assert(_humongous_start_region == NULL,
"we should have already filtered out humongous regions");
assert(_end == _orig_end,
"we should have already filtered out humongous regions");
_in_collection_set = false;
set_young_index_in_cset(-1);
uninstall_surv_rate_group();
set_young_type(NotYoung);
reset_pre_dummy_top();
if (!par) {
// If this is parallel, this will be done later.
HeapRegionRemSet* hrrs = rem_set();
if (locked) {
hrrs->clear_locked();
} else {
hrrs->clear();
}
_claimed = InitialClaimValue;
}
zero_marked_bytes();
_offsets.resize(HeapRegion::GrainWords);
init_top_at_mark_start();
if (clear_space) clear(SpaceDecorator::Mangle);
}
void HeapRegion::par_clear() {
assert(used() == 0, "the region should have been already cleared");
assert(capacity() == HeapRegion::GrainBytes, "should be back to normal");
HeapRegionRemSet* hrrs = rem_set();
hrrs->clear();
CardTableModRefBS* ct_bs =
(CardTableModRefBS*)G1CollectedHeap::heap()->barrier_set();
ct_bs->clear(MemRegion(bottom(), end()));
}