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8257521: runtime/logging/MonitorInflationTest.java crashed in MonitorList::unlink_deflated

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Reviewed-by: kbarrett
This commit is contained in:
Daniel D. Daugherty 2020-12-23 14:36:47 +00:00
parent 61e5e393a7
commit 9cd8e38ab8
1 changed files with 3 additions and 2 deletions
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5
src/hotspot/share/runtime/synchronizer.cpp
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@ -112,7 +112,8 @@ size_t MonitorList::unlink_deflated(Thread* self, LogStream* ls,
ObjectMonitor* prev = NULL; ObjectMonitor* prev = NULL;
ObjectMonitor* head = Atomic::load_acquire(&_head); ObjectMonitor* head = Atomic::load_acquire(&_head);
ObjectMonitor* m = head; ObjectMonitor* m = head;
do { // The in-use list head can be NULL during the final audit.
while (m != NULL) {
if (m->is_being_async_deflated()) { if (m->is_being_async_deflated()) {
// Find next live ObjectMonitor. // Find next live ObjectMonitor.
ObjectMonitor* next = m; ObjectMonitor* next = m;
@ -154,7 +155,7 @@ size_t MonitorList::unlink_deflated(Thread* self, LogStream* ls,
"unlinked_count", unlinked_count, "unlinked_count", unlinked_count,
ls, timer_p); ls, timer_p);
} }
} while (m != NULL); }
Atomic::sub(&_count, unlinked_count); Atomic::sub(&_count, unlinked_count);
return unlinked_count; return unlinked_count;
} }