On Mon, 29 Jul 2024 09:49:11 GMT, Jiawei Tang <jwt...@openjdk.org> wrote:
>> I add the testcase which can reproduce the crash. I hope that I could get
>> some advise if the codes need changing.
>
> Jiawei Tang has refreshed the contents of this pull request, and previous
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> compared to the previous content of the PR. The pull request contains one new
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>
> 8337331: crash: pinned virtual thread will lead to jvm crash when running
> with the javaagent option
test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadTraceWithAgent/TestPinCaseWithTrace.java
line 2:
> 1: /*
> 2: * Copyright (c) 2024, 2024, Oracle and/or its affiliates. All rights
> reserved.
I assume you didn't mean to include a date range on a new test.
test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadTraceWithAgent/TestPinCaseWithTrace.java
line 66:
> 64: System.out.println("call native: " + nativeFuncPin(1));
> 65: });
> 66: }
Does this really need to use a custom scheduler? If not, the running the test
with -Djdk.virtualThreadScheduler.maxPoolSize=1 would be simpler. If you really
need a custom scheduler, the test can use jdk.test.lib.thread.VThreadScheduler.
Also to create a pining scenario it can use jdk.test.lib.thread.VThreadPinner.
You'll see examples of both in other tests.
test/hotspot/jtreg/serviceability/jvmti/vthread/VThreadTraceWithAgent/TestPinCaseWithTrace.java
line 70:
> 68: static int native2Java(int b) {
> 69: try {
> 70: Thread.sleep(500); // try yield, will pin,
> javaagent+tracePinnedThreads will crash here (because of the class
> `PinnedThreadPrinter`)
As noted in the JBS issue, -Djdk.tracePinnedThreads has been very problematic
and has been removed in the loom repo as part of the object monitor changes.
-------------
PR Review Comment: https://git.openjdk.org/jdk/pull/20373#discussion_r1694938805
PR Review Comment: https://git.openjdk.org/jdk/pull/20373#discussion_r1694941417
PR Review Comment: https://git.openjdk.org/jdk/pull/20373#discussion_r1694942324
