Integrated: 8253694: Remove Thread::muxAcquire() from ThreadCrashProtection()

[Patricio Chilano Mateo]

On Mon, 28 Sep 2020 06:07:58 GMT, Patricio Chilano Mateo <pchilanomate at openjdk.org> wrote:

> Hi all,
> 
> Please review the following patch. Current ThreadCrashProtection() implementation uses static members which requires
> the use of Thread::muxAcquire() to allow only one user at a time. We can avoid this synchronization requirement if each
> thread has its own ThreadCrashProtection *data. I tested it builds on Linux, macOS and Windows. Since the
> JfrThreadSampler is the only one using this I run all the tests from test/jdk/jdk/jfr/. I also run some tests with JFR
> enabled while forcing a crash in OSThreadSampler::protected_task() and tests passed with several "Thread method sampler
> crashed" UL output. Also run tiers1-3.  Thanks, Patricio

This pull request has now been integrated.

Changeset: 57493c19
Author:    Patricio Chilano Mateo <pchilanomate at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/57493c19
Stats:     26 lines in 6 files changed: 6 ins; 18 del; 2 mod

8253694: Remove Thread::muxAcquire() from ThreadCrashProtection()

Reviewed-by: dholmes, dcubed, coleenp

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PR: https://git.openjdk.java.net/jdk/pull/376