RFR: 8332259: JvmtiTrace::safe_get_thread_name fails if current thread is in native state [v4]
Leonid Mesnik
lmesnik at openjdk.org
Mon May 20 17:13:01 UTC 2024
On Fri, 17 May 2024 22:31:32 GMT, Leonid Mesnik <lmesnik at openjdk.org> wrote:
>> The JvmtiTrace::safe_get_thread_name sometimes crashes when called while current thread is in native thread state.
>>
>> It happens when thread_name is set for tracing from jvmti functions.
>> See:
>> https://github.com/openjdk/jdk/blob/master/src/hotspot/share/prims/jvmtiEnter.xsl#L649
>>
>> The setup is called and the thread name is used in tracing before the thread transition. There is no good location where this method could be called from vm thread_state only. Some functions like raw monitor enter/exit never transition in vm state. So sometimes it is needed to call this function from native thread state.
>>
>> The change should affect JVMTI trace mode only (-XX:TraceJVMTI).
>>
>> Verified by running jvmti/jdi/jdb tests with tracing enabled.
>
> Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:
>
> wrong thread state
There are no tests currently executed with TraceJVMTI.
I am thinking about adding execution of the svc testing. However I've got another failure that should resolved before
https://bugs.openjdk.org/browse/JDK-8332536
It is not related to the current issue.
Probably, it makes sense to add some basic logging testing with verification of log content also.
-------------
PR Comment: https://git.openjdk.org/jdk/pull/19275#issuecomment-2120856531
More information about the serviceability-dev
mailing list