This is an issue with a dynamic load of a JVMTI agent into running VM. The `VM_SetNotifyJvmtiEventsMode` enabling operation makes a call to the function `count_transitions_and_correct_jvmti_thread_states()`. This function in its turn make a call to the function `correct_jvmti_thread_state()`. But it does it conditionally, only if the field `_whitebox_used` is `true`. The test provided in the bug report showed that it has to be called unconditionally as the assumption that it is only needed on the subsequent `notifyJvmti` enabling is incorrect.
Then the field `_whitebox_used` is not needed anymore and removed in this fix. Some obsolete comments are removed or updated. New test is added: `test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadTLSTest`. It is failed without the fix and passed with the fix. Testing: - ran new test `test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadTLSTest` - mach5 tiers 1-5 are good ------------- Commit messages: - fix traling spaces and remove unneeded empty lines in new test - 8311556: GetThreadLocalStorage not working for vthreads mounted during JVMTI attach Changes: https://git.openjdk.org/jdk/pull/14842/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14842&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8311556 Stats: 198 lines in 3 files changed: 183 ins; 13 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/14842.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14842/head:pull/14842 PR: https://git.openjdk.org/jdk/pull/14842
