inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm,
T* p) {
assert(should_scavenge(p, true), "revisiting object?");
oop o = oopDesc::load_decode_heap_oop_not_null(p);
oop new_obj = o->is_forwarded()
? o->forwardee()
: pm->copy_to_survivor_space<promote_immediately>(o);
#ifndef PRODUCT
// This code must come after the CAS test, or it will print incorrect
// information.
if (TraceScavenge && o->is_forwarded()) {
gclog_or_tty->print_cr("{%s %s " PTR_FORMAT " -> " PTR_FORMAT " (%d)}",
"forwarding",
new_obj->klass()->internal_name(), o, new_obj, new_obj->size());
}
#endif
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. These pointers are either from roots
// or from metadata.
if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) &&
Universe::heap()->is_in_reserved(p)) {
if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) {
card_table()->inline_write_ref_field_gc(p, new_obj);
}
}
}
inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm,
T* p) {
assert(should_scavenge(p, true), "revisiting object?");
oop o = oopDesc::load_decode_heap_oop_not_null(p);
oop new_obj = o->is_forwarded()
? o->forwardee()
: pm->copy_to_survivor_space(o);
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)) &&
Universe::heap()->is_in_reserved(p)) {
if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) {
card_table()->inline_write_ref_field_gc(p, new_obj);
}
}
}
// 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.
inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, oop* p) {
assert(should_scavenge(*p), "Sanity");
assert(Universe::heap()->kind() == CollectedHeap::ParallelScavengeHeap, "Sanity");
assert(!((ParallelScavengeHeap*)Universe::heap())->young_gen()->to_space()->contains(*p),"Attempt to rescan object");
oop o = *p;
if (o->is_forwarded()) {
*p = o->forwardee();
} else {
*p = pm->copy_to_survivor_space(o);
}
// We cannot mark without test, as some code passes us pointers that are outside the heap.
if (((HeapWord*)p >= _eden_boundary) && Universe::heap()->is_in_reserved(p)) {
o = *p;
if ((HeapWord*)o < _eden_boundary) {
card_table()->inline_write_ref_field_gc(p, o);
}
}
}
