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8248302: JFR: Add test for OldObjectSample event when using ZGC
Reviewed-by: mgronlun
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egahlin committed Jun 25, 2020
1 parent 4682835 commit 23bbc981a6e72609730c32abd428073421e4671b
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/*
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package jdk.jfr.event.oldobject;

import java.util.ArrayList;
import java.util.List;

import jdk.jfr.Recording;
import jdk.jfr.consumer.RecordedEvent;
import jdk.jfr.internal.test.WhiteBox;
import jdk.test.lib.jfr.EventNames;
import jdk.test.lib.jfr.Events;

/**
* @test
* @key jfr
* @requires vm.hasJFR & vm.gc.Z
* @requires vm.gc == "null"
* @summary Test leak profiler with ZGC
* @library /test/lib /test/jdk
* @modules jdk.jfr/jdk.jfr.internal.test
* @run main/othervm -XX:TLABSize=2k -XX:+UseZGC jdk.jfr.event.oldobject.TestZ
*/
public class TestZ {

static private class FindMe {
}

public static List<FindMe[]> list = new ArrayList<>(OldObjects.MIN_SIZE);

public static void main(String[] args) throws Exception {
WhiteBox.setWriteAllObjectSamples(true);

while (true) {
try (Recording r = new Recording()) {
r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
r.start();
allocateFindMe();
System.gc();
r.stop();
List<RecordedEvent> events = Events.fromRecording(r);
System.out.println(events);
if (OldObjects.countMatchingEvents(events, FindMe[].class, null, null, -1, "allocateFindMe") > 0) {
return;
}
System.out.println("Could not find leaking object, retrying...");
}
list.clear();
}
}

public static void allocateFindMe() {
for (int i = 0; i < OldObjects.MIN_SIZE; i++) {
// Allocate array to trigger sampling code path for interpreter / c1
list.add(new FindMe[0]);
}
}

}

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