RFR: 8314225: SIGSEGV in JavaThread::is_lock_owned [v2]

Wed Jan 31 04:02:01 UTC 2024

On Wed, 31 Jan 2024 00:23:38 GMT, Dean Long <dlong at openjdk.org> wrote:

> > BasicLock::move_to() doesn't change the markword
> 
> Good point, I missed that. So where does the markword get updated if the object was stack-locked?
>
You mean in this BasicLock::move_to() call? If it was stack-locked, inflation will change the markword to point to the created ObjectMonitor (https://github.com/openjdk/jdk/blob/master/src/hotspot/share/runtime/synchronizer.cpp#L1471). The _owner field of that inflated monitor will contain the BasicLock* that was previously stored in the markword.

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PR Comment: https://git.openjdk.org/jdk/pull/17566#issuecomment-1918338152