The crash happens because nmethod might become a zombie before it is enqueued in JvmtiDeferredEventQueue or after it is dequeued from it. The crash is reproduced by serviceability/jvmti/CompiledMethodLoad/Zombie.java. However, it takes ~3K runs to hit it. I verified the fix by running this test >100K on each platform. Also, I verified that protecting in 'void JvmtiDeferredEventQueue::post(JvmtiEnv* env)' is not enough.
------------- Commit messages: - fix in problemlist.txt - Merge branch 'master' of https://github.com/openjdk/jdk into 8245877 - ident fixed. - test unproblemlisted. - fix Changes: https://git.openjdk.java.net/jdk/pull/4602/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4602&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8245877 Stats: 9 lines in 4 files changed: 5 ins; 2 del; 2 mod Patch: https://git.openjdk.java.net/jdk/pull/4602.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4602/head:pull/4602 PR: https://git.openjdk.java.net/jdk/pull/4602
