RFR: 8366925: Improper std::nothrow new expression in NativeHeapTrimmerThread ctor [v2]

[Kim Barrett]

On Tue, 16 Sep 2025 01:00:01 GMT, Guanqiang Han <ghan at openjdk.org> wrote:

>> Please review this Patch.
>> 
>> **Description:**
>> Add null check for _lock in NativeHeapTrimmerThread constructor. If allocation of the lock fails (_lock == nullptr), it indicates an out-of-memory condition. Since even this small allocation failed, it's unlikely that subsequent operations would succeed, so we terminate the JVM immediately.
>
> Guanqiang Han has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update trimNativeHeap.cpp
>   
>   remove std::nothrow and rely on the default new handling

Looks good.

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Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27275#pullrequestreview-3227833340