On Wed, 10 May 2023 23:41:07 GMT, Alex Menkov <amen...@openjdk.org> wrote:
>> The fix updates JVMTI FollowReferences implementation to report references >> from virtual threads: >> - unmounted vthreads are detected, their stack references for >> JVMTI_HEAP_REFERENCE_STACK_LOCAL/JVMTI_HEAP_REFERENCE_JNI_LOCAL; >> - stacks of mounted vthreads are splitted into 2 parts (virtual thread stack >> and carrier thread stack), references are reported with correct thread >> id/class tag/object tags/frame depth; >> - common code to handle stack frames are moved into separate class; >> >> Threads are reported as: >> - platform threads: JVMTI_HEAP_REFERENCE_THREAD (as before); >> - mounted vthreads (synthetic references, consider them as heap roots >> because carrier threads are roots): JVMTI_HEAP_REFERENCE_OTHER; >> - unmounted vthreads: not reported as heap roots. > > Alex Menkov has updated the pull request incrementally with one additional > commit since the last revision: > > some refactoring > > added StackRefCollector::process_frames; > used single RegisterMap instance; > used RegisterMap::WalkContinuation::include for RegisterMap; I spent some time looking through this and follow enough to say I think it looks good. ------------- Marked as reviewed by kevinw (Committer). PR Review: https://git.openjdk.org/jdk/pull/13254#pullrequestreview-1437321344
