RFR: 8306034: add support of virtual threads to JVMTI StopThread [v3]

[Serguei Spitsyn]

On Fri, 21 Apr 2023 16:34:34 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

>> Serguei Spitsyn has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   corrections for BoundVirtualThread and test typos
>
> test/hotspot/jtreg/serviceability/jvmti/vthread/StopThreadTest/StopThreadTest.java line 89:
> 
>> 87:         log("\nMain #A: method A() must be blocked on entering a synchronized statement");
>> 88:         synchronized (TestTask.lock) {
>> 89:             testTaskThread = Thread.ofVirtual().name("TestTaskThread").start(testTask);
> 
> Do we have other tests that are doing the equivalent testing on platform threads?

Do you ask this question to check if we want to extend this test to provide coverage for platform threads as well?

The support of platform threads is much simpler. The JVMTI `StopThread` never returns the `THREAD_NOT_SUSPENDED` and `OPAQUE_FRAME` error codes for platform threads. So that this kind of testing is not needed for platform threads.

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PR Review Comment: https://git.openjdk.org/jdk/pull/13546#discussion_r1174068855