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Stabilize TestSharedCloseJvmti by avoiding latch park #22

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Stabilize TestSharedCloseJvmti by avoiding latch park #22

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19 changes: 11 additions & 8 deletions test/jdk/java/foreign/sharedclosejvmti/TestSharedCloseJvmti.java
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,12 @@
* questions.
*/

/*
* ===========================================================================
* (c) Copyright IBM Corp. 2026, 2026 All Rights Reserved
* ===========================================================================
*/

/*
* @test
* @bug 8370344
Expand Down Expand Up @@ -71,9 +77,9 @@ public static class EventDuringScopedAccessRunner {
static final int ADDED_FRAMES = 10;

static final CountDownLatch MAIN_LATCH = new CountDownLatch(1);
static final CountDownLatch TARGET_LATCH = new CountDownLatch(1);

static volatile int SINK;
static volatile boolean CLOSED = false;

public static void main(String[] args) throws Throwable {
try (Arena arena = Arena.ofShared()) {
Expand All @@ -88,8 +94,8 @@ public static void main(String[] args) throws Throwable {
// wait until trigger thread is in JVMTI event callback
MAIN_LATCH.await();
}
// Notify trigger thread that arena was closed
TARGET_LATCH.countDown();
// Publish that the arena has been closed (Trigger thread spins on CLOSED)
CLOSED = true;
}

static boolean reentrant = false;
Expand Down Expand Up @@ -121,11 +127,8 @@ private static void addFrames(int depth) {
if (depth >= ADDED_FRAMES) {
// notify main thread to close the arena
MAIN_LATCH.countDown();
try {
// wait here until main thread has closed arena
TARGET_LATCH.await();
} catch (InterruptedException ex) {
throw new RuntimeException("Unexpected interruption");
while (!CLOSED) {
Thread.onSpinWait();
}
return;
}
Expand Down