> See the JBS issue for the extended problem description. > > Native threads that were attached to the JVM through an FFM upcall are > automatically detached from the VM when they join/terminate. However, if a > native thread tries to terminate after the VM has exited without going > through `DestroyJavaVm` (e.g. as a result of calling `System.exit`), they > will block in `VM_Exit::block_if_vm_exited` inside `DetachCurrentThread`. > This may happen for instance when they try to join after the JVM has exited > in an `atexit` handler. > > This patch adds a check before trying to detach the thread to see if the VM > has exited and bails out if it has. This does not prevent issues as a result > of a race between the VM exiting and the thread joining, but it does prevent > issues in the more comment case where a thread simply outlives the VM. > > --------- > - [X] I confirm that I make this contribution in accordance with the [OpenJDK > Interim AI Policy](https://openjdk.org/legal/ai).
Jorn Vernee has updated the pull request incrementally with two additional commits since the last revision: - Cleanup imports - review comments ------------- Changes: - all: https://git.openjdk.org/jdk/pull/32686/files - new: https://git.openjdk.org/jdk/pull/32686/files/2791cf05..80c94a33 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=32686&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=32686&range=01-02 Stats: 50 lines in 2 files changed: 8 ins; 19 del; 23 mod Patch: https://git.openjdk.org/jdk/pull/32686.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/32686/head:pull/32686 PR: https://git.openjdk.org/jdk/pull/32686
