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src/hotspot/share/code/nmethod.cpp
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*** 1148,1158 ****
signed char old_state = Atomic::load(&_state);
if (old_state >= new_state) {
// Ensure monotonicity of transitions.
return false;
}
! if (Atomic::cmpxchg(new_state, &_state, old_state) == old_state) {
return true;
}
}
}
--- 1148,1158 ----
signed char old_state = Atomic::load(&_state);
if (old_state >= new_state) {
// Ensure monotonicity of transitions.
return false;
}
! if (Atomic::cmpxchg(&_state, old_state, new_state) == old_state) {
return true;
}
}
}
*** 1847,1857 ****
bool nmethod::oops_do_try_claim_weak_request() {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
if ((_oops_do_mark_link == NULL) &&
! (Atomic::replace_if_null(mark_link(this, claim_weak_request_tag), &_oops_do_mark_link))) {
oops_do_log_change("oops_do, mark weak request");
return true;
}
return false;
}
--- 1847,1857 ----
bool nmethod::oops_do_try_claim_weak_request() {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
if ((_oops_do_mark_link == NULL) &&
! (Atomic::replace_if_null(&_oops_do_mark_link, mark_link(this, claim_weak_request_tag)))) {
oops_do_log_change("oops_do, mark weak request");
return true;
}
return false;
}
*** 1861,1893 ****
}
nmethod::oops_do_mark_link* nmethod::oops_do_try_claim_strong_done() {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
! oops_do_mark_link* old_next = Atomic::cmpxchg(mark_link(this, claim_strong_done_tag), &_oops_do_mark_link, mark_link(NULL, claim_weak_request_tag));
if (old_next == NULL) {
oops_do_log_change("oops_do, mark strong done");
}
return old_next;
}
nmethod::oops_do_mark_link* nmethod::oops_do_try_add_strong_request(nmethod::oops_do_mark_link* next) {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
assert(next == mark_link(this, claim_weak_request_tag), "Should be claimed as weak");
! oops_do_mark_link* old_next = Atomic::cmpxchg(mark_link(this, claim_strong_request_tag), &_oops_do_mark_link, next);
if (old_next == next) {
oops_do_log_change("oops_do, mark strong request");
}
return old_next;
}
bool nmethod::oops_do_try_claim_weak_done_as_strong_done(nmethod::oops_do_mark_link* next) {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
assert(extract_state(next) == claim_weak_done_tag, "Should be claimed as weak done");
! oops_do_mark_link* old_next = Atomic::cmpxchg(mark_link(extract_nmethod(next), claim_strong_done_tag), &_oops_do_mark_link, next);
if (old_next == next) {
oops_do_log_change("oops_do, mark weak done -> mark strong done");
return true;
}
return false;
--- 1861,1893 ----
}
nmethod::oops_do_mark_link* nmethod::oops_do_try_claim_strong_done() {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
! oops_do_mark_link* old_next = Atomic::cmpxchg(&_oops_do_mark_link, mark_link(NULL, claim_weak_request_tag), mark_link(this, claim_strong_done_tag));
if (old_next == NULL) {
oops_do_log_change("oops_do, mark strong done");
}
return old_next;
}
nmethod::oops_do_mark_link* nmethod::oops_do_try_add_strong_request(nmethod::oops_do_mark_link* next) {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
assert(next == mark_link(this, claim_weak_request_tag), "Should be claimed as weak");
! oops_do_mark_link* old_next = Atomic::cmpxchg(&_oops_do_mark_link, next, mark_link(this, claim_strong_request_tag));
if (old_next == next) {
oops_do_log_change("oops_do, mark strong request");
}
return old_next;
}
bool nmethod::oops_do_try_claim_weak_done_as_strong_done(nmethod::oops_do_mark_link* next) {
assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");
assert(extract_state(next) == claim_weak_done_tag, "Should be claimed as weak done");
! oops_do_mark_link* old_next = Atomic::cmpxchg(&_oops_do_mark_link, next, mark_link(extract_nmethod(next), claim_strong_done_tag));
if (old_next == next) {
oops_do_log_change("oops_do, mark weak done -> mark strong done");
return true;
}
return false;
*** 1904,1914 ****
// Self-loop if needed.
if (old_head == NULL) {
old_head = this;
}
// Try to install end of list and weak done tag.
! if (Atomic::cmpxchg(mark_link(old_head, claim_weak_done_tag), &_oops_do_mark_link, mark_link(this, claim_weak_request_tag)) == mark_link(this, claim_weak_request_tag)) {
oops_do_log_change("oops_do, mark weak done");
return NULL;
} else {
return old_head;
}
--- 1904,1914 ----
// Self-loop if needed.
if (old_head == NULL) {
old_head = this;
}
// Try to install end of list and weak done tag.
! if (Atomic::cmpxchg(&_oops_do_mark_link, mark_link(this, claim_weak_request_tag), mark_link(old_head, claim_weak_done_tag)) == mark_link(this, claim_weak_request_tag)) {
oops_do_log_change("oops_do, mark weak done");
return NULL;
} else {
return old_head;
}
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