> The root cause for crash in ZGC is that the JNIHandles are processed before > object iteration. And ZGC would update the JNIHandles at object iteration > with read barrier. So the crash is cause by accessing the invalid address > which can be dummy info after zgc, and hence crash. > > The lock rank issue can be fixed because the related mutexes are acquired in > safepoint. so the safepoint_check_required could be safepoint_check_always. > > The Epsilon issue is caused by wrong _num_dumper_thread calculated when the > gang==NULL.
Lin Zang has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits: - un-ProblemList BasicJMapTest.java - Merge branch 'master' into pd-fix - 8274196: Crashes in VM_HeapDumper::work after JDK-8252842 ------------- Changes: https://git.openjdk.java.net/jdk/pull/5681/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5681&range=01 Stats: 53 lines in 3 files changed: 22 ins; 28 del; 3 mod Patch: https://git.openjdk.java.net/jdk/pull/5681.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5681/head:pull/5681 PR: https://git.openjdk.java.net/jdk/pull/5681
