[jdk11u-dev] RFR: 8213137: Remove static initialization of monitor/mutex instances

[Evgeny Astigeevich]

On Wed, 9 Jun 2021 19:48:52 GMT, Evgeny Astigeevich <github.com+42899633+eastig at openjdk.org> wrote:

> We are backporting JDK-8210832: Remove sneaky locking in class Monitor. It has a few dependencies. JDK-8213137: Remove static initialization of monitor/mutex instances is one of them.
> 
> The original patch from JDK-8213137 causes conflicts. The conflicts are because a patched file does not exist in jdk11u and git struggled to position changes. The original changes are not changed after resolution of the conflicts.
> 
> Testing: Amazon Linux 2, aarch64, tier1 and tier2. Amazon Linux 2, x86_64, tier1 and tier2.

In OpenJDK Tip:

./services/memTracker.hpp:  static Mutex*           _query_lock;
./share/gc/shared/gcLogPrecious.hpp:  static Mutex* _lock;
./share/runtime/vmThread.hpp:  static Monitor * _terminate_lock;

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PR: https://git.openjdk.java.net/jdk11u-dev/pull/21