RFR: 8364004: Expose VMError::controlledCrash via Whitebox

[Kim Barrett]

On Fri, 25 Jul 2025 07:34:49 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> Small addition to the circle of WhiteBox functions to allow more controlled crashes triggered from jtreg tests.

Changes requested by kbarrett (Reviewer).

src/hotspot/share/prims/whitebox.cpp line 2734:

> 2732: WB_ENTRY(void, WB_ControlledCrash(JNIEnv* env, jobject o, jint how))
> 2733: #ifdef ASSERT
> 2734:   DEBUG_ONLY(VMError::controlled_crash(how);)

`DEBUG_ONLY` wrapping isn't needed here, since we're in `#ifdef ASSERT` context.

test/lib/jdk/test/whitebox/WhiteBox.java line 564:

> 562: 
> 563:   // Force a controlled crash (debug builds only)
> 564:   public native void controlledCrash(int how);

Please put this somewhere other than in the middle of GC & reference processing related functions.

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PR Review: https://git.openjdk.org/jdk/pull/26472#pullrequestreview-3060602512
PR Review Comment: https://git.openjdk.org/jdk/pull/26472#discussion_r2234846750
PR Review Comment: https://git.openjdk.org/jdk/pull/26472#discussion_r2234855579