On Thu, 17 Nov 2022 09:12:07 GMT, Serguei Spitsyn <sspit...@openjdk.org> wrote:

> The `VirtualThread` static field `notifyJvmtiEvents` is not set correctly in 
> cases JVMTI agents are loaded into running VM. It is because an extra call to 
> java_lang_VirtualThread::init_static_notify_jvmti_events() is needed.
> This function is called once at the VM initialization, so this extra call is 
> not necessary for agent loaded at startup.
> 
> Testing:
> New test is added: 
> `test/hotspot/jtreg/serviceability/jvmti/vthread/VirtualStackTraceTest`
> This test is failed without fix and passed with it.
> TBD: run all JVMTI and JDI test in mach5.

test/hotspot/jtreg/serviceability/jvmti/vthread/VirtualStackTraceTest/VirtualStackTraceTest.java
 line 27:

> 25:  * @test
> 26:  * @summary Verifies JVMTI GetStackTrace does not truncate virtual thread 
> stack trace with agent attach
> 27:  * @requires vm.continuations

@requires vm.jvmti is also needed

-------------

PR: https://git.openjdk.org/jdk/pull/11204

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