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8361103: java_lang_Thread::async_get_stack_trace does not properly protect JavaThread #26119

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@alexmenkov alexmenkov commented Jul 3, 2025

The fix updates java_lang_Thread::async_get_stack_trace() (used by java.lang.Thread.getStackTrace() to get stack trace for platform and mounted virtual threads) to correctly use ThreadListHandle for thread protection.

Testing: tier1..5


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  • JDK-8361103: java_lang_Thread::async_get_stack_trace does not properly protect JavaThread (Bug - P4)

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bridgekeeper bot commented Jul 3, 2025

👋 Welcome back amenkov! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

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❗ This change is not yet ready to be integrated.
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@openjdk openjdk bot changed the title 8361103 8361103: java_lang_Thread::async_get_stack_trace does not properly protect JavaThread Jul 3, 2025
@openjdk openjdk bot added the rfr Pull request is ready for review label Jul 3, 2025
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@alexmenkov The following label will be automatically applied to this pull request:

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@openjdk openjdk bot added the hotspot hotspot-dev@openjdk.org label Jul 3, 2025
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Webrevs

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Generally looks good. A couple of minor nits/queries.

Thanks

thread = java_lang_Thread::thread(carrier_thread);
} else {
thread = java_lang_Thread::thread(java_thread);
java_thread = java_lang_Thread::thread(carrier_thread);
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Won't java_thread already have been set correctly by cv_internal_thread_to_JavaThread?

}
if (thread == nullptr) {
if (java_thread == nullptr) {
// terminated platform thread or unmounted virtual thread
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Wasn't the unmounted virtual thread case already handled by the return at line 1894?

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