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8204524: Unnecessary memory barriers in G1ParScanThreadState::copy_to_survivor_space

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Reviewed-by: kbarrett, mdoerr, drwhite, tschatzl
This commit is contained in:
Michihiro Horie 2018-06-25 10:41:03 +02:00
parent 84eec7f854
commit 4641ea7bed
3 changed files with 5 additions and 5 deletions
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4
src/hotspot/share/oops/oop.inline.hpp
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@ -352,7 +352,7 @@ bool oopDesc::cas_forward_to(oop p, markOop compare, atomic_memory_order order)
return cas_set_mark_raw(m, compare, order) == compare;
}
oop oopDesc::forward_to_atomic(oop p) {
oop oopDesc::forward_to_atomic(oop p, atomic_memory_order order) {
markOop oldMark = mark_raw();
markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p);
markOop curMark;
@ -361,7 +361,7 @@ oop oopDesc::forward_to_atomic(oop p) {
assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this.");
while (!oldMark->is_marked()) {
curMark = cas_set_mark_raw(forwardPtrMark, oldMark);
curMark = cas_set_mark_raw(forwardPtrMark, oldMark, order);
assert(is_forwarded(), "object should have been forwarded");
if (curMark == oldMark) {
return NULL;