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8201826: G1: Don't invoke WeakProcessor if mark stack has overflowed

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Move WeakProcessor invocation after overflow check

Reviewed-by: stefank, tschatzl
This commit is contained in:
Kim Barrett 2018-04-23 16:00:56 -04:00
parent 816e2e5fe0
commit a99eca12cc
1 changed files with 5 additions and 8 deletions
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13
src/hotspot/share/gc/g1/g1ConcurrentMark.cpp
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@ -1695,14 +1695,6 @@ void G1ConcurrentMark::weak_refs_work(bool clear_all_soft_refs) {
assert(!rp->discovery_enabled(), "Post condition");
}
assert(has_overflown() || _global_mark_stack.is_empty(),
"Mark stack should be empty (unless it has overflown)");
{
GCTraceTime(Debug, gc, phases) debug("Weak Processing", _gc_timer_cm);
WeakProcessor::weak_oops_do(&g1_is_alive, &do_nothing_cl);
}
if (has_overflown()) {
// We can not trust g1_is_alive if the marking stack overflowed
return;
@ -1710,6 +1702,11 @@ void G1ConcurrentMark::weak_refs_work(bool clear_all_soft_refs) {
assert(_global_mark_stack.is_empty(), "Marking should have completed");
{
GCTraceTime(Debug, gc, phases) debug("Weak Processing", _gc_timer_cm);
WeakProcessor::weak_oops_do(&g1_is_alive, &do_nothing_cl);
}
// Unload Klasses, String, Symbols, Code Cache, etc.
if (ClassUnloadingWithConcurrentMark) {
GCTraceTime(Debug, gc, phases) debug("Class Unloading", _gc_timer_cm);