Commits on Jul 17, 2023

1. [JDK21] Add support for JVMTI StopThread …

   Previously, StopThread returned JVMTI_ERROR_UNSUPPORTED_OPERATION for
   a virtual thread.
   
   In JDK21, StopThread includes support for virtual threads as per the
   JVMTI specification:
   - Error if a virtual thread is not suspended and not the current
     thread.
   - Error if a virtual thread is unomunted since it won't be able to
     throw an asynchronous exception from the current frame.
   
   Related:
   - eclipse-openj9#17717
   - eclipse-openj9#17718
   
   Also, StopThread should not clear the
   J9_PUBLIC_FLAGS_HALT_THREAD_JAVA_SUSPEND flag. This behaviour is not
   documented in the JVMTI specification. It causes incorrect behaviour
   for ResumeThread when the following sequence of JVMTI functions are
   invoked: SuspendThread -> StopThread -> ResumeThread.
   
   Signed-off-by: Babneet Singh <sbabneet@ca.ibm.com>

   

   babsingh committed Jul 17, 2023
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