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8364503: gc/g1/TestCodeCacheUnloadDuringConcCycle.java fails because of race printing to stdout #26592

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8364503: gc/g1/TestCodeCacheUnloadDuringConcCycle.java fails because of race printing to stdout #26592

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8364503
tschatzl Aug 1, 2025
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* review ayang
tschatzl Aug 4, 2025
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6 changes: 5 additions & 1 deletion test/hotspot/jtreg/gc/g1/TestCodeCacheUnloadDuringConcCycle.java
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Original file line number Diff line number Diff line change
Expand Up @@ -147,6 +147,7 @@ private static void triggerCodeCacheGC() throws Exception {
}

public static void main(String[] args) throws Exception {
System.out.println("Running to breakpoint: " + args[0]);
try {
WB.concurrentGCAcquireControl();
WB.concurrentGCRunTo(args[0]);
Expand All @@ -157,9 +158,12 @@ public static void main(String[] args) throws Exception {

WB.concurrentGCRunToIdle();
} finally {
// Make sure that the marker we use to find the expected log message is printed
// before we release whitebox control, i.e. before the expected garbage collection
// can start.
System.out.println(TestCodeCacheUnloadDuringConcCycle.AFTER_FIRST_CYCLE_MARKER);
WB.concurrentGCReleaseControl();
}
System.out.println(TestCodeCacheUnloadDuringConcCycle.AFTER_FIRST_CYCLE_MARKER);
Thread.sleep(1000);
triggerCodeCacheGC();
}
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