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

[Patricio Chilano Mateo]

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

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Commit messages:
 - v1

Changes: https://git.openjdk.java.net/jdk/pull/376/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=376&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8253694
  Stats: 115 lines in 13 files changed: 36 ins; 58 del; 21 mod
  Patch: https://git.openjdk.java.net/jdk/pull/376.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/376/head:pull/376

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