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8215047: Task terminators do not complete termination in consistent state

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Reviewed-by: tschatzl, minqi
This commit is contained in:
Zhengyu Gu 2019-01-29 08:39:04 -05:00
parent c9ad677866
commit 5c78491bd7
4 changed files with 56 additions and 17 deletions
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7
src/hotspot/share/gc/shared/taskqueue.hpp
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@ -467,11 +467,18 @@ protected:
virtual void yield();
void sleep(uint millis);
// Called when exiting termination is requested.
// When the request is made, terminator may have already terminated
// (e.g. all threads are arrived and offered termination). In this case,
// it should ignore the request and complete the termination.
// Return true if termination is completed. Otherwise, return false.
bool complete_or_exit_termination();
public:
// "n_threads" is the number of threads to be terminated. "queue_set" is a
// queue sets of work queues of other threads.
ParallelTaskTerminator(uint n_threads, TaskQueueSetSuper* queue_set);
virtual ~ParallelTaskTerminator();
// The current thread has no work, and is ready to terminate if everyone
// else is. If returns "true", all threads are terminated. If returns