On Tue, 25 Nov 2025 23:45:14 GMT, Coleen Phillimore <[email protected]> wrote:
>> src/hotspot/share/runtime/javaThread.cpp line 1152:
>>
>>> 1150: bool JavaThread::is_in_VTMS_transition() const {
>>> 1151: return AtomicAccess::load(&_is_in_VTMS_transition);
>>> 1152: }
>>
>> Is the JavaThread version always the same as the
>> java_lang_Thread::is_in_VTMS_transition(threadOop()) value?
>
> Why is there the same flag with the same name in both the Java class and C++
> JavaThread? Might be an efficient cache, so something should say that (if
> true).
The one in `JavaThread` is needed for the `disable_transition_for_all` case.
Processing each vthread is not viable, so we instead process all `JavaThreads`.
If no `JavaThread` is in a transition then it implies no vthread is in a
transition.
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PR Review Comment: https://git.openjdk.org/jdk/pull/28361#discussion_r2566665257
