On Fri, 24 Sep 2021 13:13:39 GMT, Lin Zang <lz...@openjdk.org> wrote:
> 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. This pull request has now been integrated. Changeset: bfd61634 Author: Lin Zang <lz...@openjdk.org> URL: https://git.openjdk.java.net/jdk/commit/bfd616347126a802c641326a6be5a14c4cd7af90 Stats: 22 lines in 3 files changed: 5 ins; 13 del; 4 mod 8274196: Crashes in VM_HeapDumper::work after JDK-8252842 8274245: sun/tools/jmap/BasicJMapTest.java Mutex rank failures Reviewed-by: coleenp, pliden, cjplummer ------------- PR: https://git.openjdk.java.net/jdk/pull/5681
