On Tue, 16 Dec 2025 03:56:56 GMT, David Holmes <[email protected]> wrote:
>> The JvmtiTagMap::flush_object_free_events() method might be called from
>> different threads.
>> The thread waits using lock until other thread posting events. The locking
>> thread is in vm state doesn't allowing safepoints. While other thread
>> posting events might request safepoints.
>>
>> The fix is to block thread to allow safepoints while waiting on the lock.
>
> src/hotspot/share/prims/jvmtiTagMap.cpp line 1208:
>
>> 1206: {
>> 1207: // If another thread is posting events, let it finish.
>> 1208: // This another thread might have safepoints during event
>> callbacks.
>
> The comment does not read correctly.
Suggestion:
// The other thread can block for safepoints during event callbacks, so ensure
we
// are safepoint-safe while waiting.
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PR Review Comment: https://git.openjdk.org/jdk/pull/28839#discussion_r2624903690
