Commits on Nov 16, 2023

1. Add JVMTI synchronization in JVM_VirtualThreadHideFrames …

   J9VMThread->threadObject can be modified between
   JVM_VirtualThreadHideFrames's first invocation with hide=true and
   second invocation with hide=false. Synchronization to prevent JVMTI
   operations is acquired between these two invocations. This prevents
   JVMTI functions to see an unstable J9VMThread->threadObject.
   
   Related: eclipse-openj9#17865
   Related: eclipse-openj9#17869
   Related: eclipse-openj9#18370
   
   Co-authored-by: Jack Lu <Jack.S.Lu@ibm.com>
   Signed-off-by: Babneet Singh <sbabneet@ca.ibm.com>

   

   babsingh and fengxue-IS committed Nov 16, 2023
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