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8339687: Rearrange reachabilityFence()s in jdk.test.lib.util.ForceGC

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Reviewed-by: dholmes, smarks, kbarrett
This commit is contained in:
Brent Christian 2024-09-11 19:02:05 +00:00
parent d9fdf69c34
commit 51b85a1f69
1 changed files with 22 additions and 21 deletions
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43
test/lib/jdk/test/lib/util/ForceGC.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2020, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -78,29 +78,30 @@ public class ForceGC {
ReferenceQueue<Object> queue = new ReferenceQueue<>();
Object obj = new Object();
PhantomReference<Object> ref = new PhantomReference<>(obj, queue);
obj = null;
Reference.reachabilityFence(obj);
Reference.reachabilityFence(ref);
try {
obj = null;
int retries = (int)(timeout / 200);
for (; retries >= 0; retries--) {
if (booleanSupplier.getAsBoolean()) {
return true;
}
System.gc();
try {
// The remove() will always block for the specified milliseconds
// if the reference has already been removed from the queue.
// But it is fine. For most cases, the 1st GC is sufficient
// to trigger and complete the cleanup.
queue.remove(200L);
} catch (InterruptedException ie) {
// ignore, the loop will try again
int retries = (int) (timeout / 200);
for (; retries >= 0; retries--) {
if (booleanSupplier.getAsBoolean()) {
return true;
}
System.gc();
try {
// The remove() will always block for the specified milliseconds
// if the reference has already been removed from the queue.
// But it is fine. For most cases, the 1st GC is sufficient
// to trigger and complete the cleanup.
queue.remove(200L);
} catch (InterruptedException ie) {
// ignore, the loop will try again
}
}
} finally {
Reference.reachabilityFence(ref);
}
return booleanSupplier.getAsBoolean();
}
}