hg: shenandoah/jdk8/hotspot: MetadataOnStackMark::record() is not MT-safe

[zgu at redhat.com]

Changeset: b261d2db2ea2
Author:    zgu
Date:      2021-07-29 12:40 -0400
URL:       https://hg.openjdk.java.net/shenandoah/jdk8/hotspot/rev/b261d2db2ea2

MetadataOnStackMark::record() is not MT-safe
Reviewed-by: rkennke

! src/share/vm/classfile/metadataOnStackMark.cpp
! src/share/vm/runtime/mutexLocker.cpp
! src/share/vm/runtime/mutexLocker.hpp