Integrated: 8268638: semaphores of AsyncLogWriter may be broken when JVM is exiting.

[Xin Liu]

On Sun, 13 Jun 2021 01:01:43 GMT, Xin Liu <xliu at openjdk.org> wrote:

> All 3 semaphores used by AsyncLogWriter are static member data. CRT(`libsystem_c.dylib __cxa_finalize_ranges`) deletes them on MacOS. Currently, AsyncLog Thread doesn't exit at all. As a result, semaphore_wait/signal
> returns with KERN_INVALID_NAME(15) After those semaphore are destroyed. 
> 
> This patch change those to regular data members. This prevents from deleting.
> This patch also provides a general RAII class AsyncLogLocker which is analogous MutexLocker.

This pull request has now been integrated.

Changeset: fa3b44d4
Author:    Xin Liu <xliu at openjdk.org>
Committer: Paul Hohensee <phh at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/fa3b44d43811dca8c609d6c61a58680835abf8e3
Stats:     22 lines in 2 files changed: 6 ins; 7 del; 9 mod

8268638: semaphores of AsyncLogWriter may be broken when JVM is exiting.

Reviewed-by: dholmes, phh

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PR: https://git.openjdk.java.net/jdk/pull/4479