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/*
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.event.oldobject;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Random;
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import java.util.Vector;
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import java.util.concurrent.BrokenBarrierException;
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import java.util.concurrent.CyclicBarrier;
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import jdk.jfr.Recording;
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import jdk.jfr.consumer.RecordedClass;
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import jdk.jfr.consumer.RecordedEvent;
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import jdk.jfr.consumer.RecordedFrame;
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import jdk.jfr.consumer.RecordedMethod;
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import jdk.jfr.consumer.RecordedObject;
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import jdk.jfr.consumer.RecordedStackTrace;
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import jdk.jfr.internal.test.WhiteBox;
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import jdk.test.lib.jfr.EventNames;
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import jdk.test.lib.jfr.Events;
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51214
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/**
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* @test
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* @key jfr
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51214
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* @requires vm.hasJFR
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* @requires vm.gc == "null"
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* @library /test/lib /test/jdk
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* @modules jdk.jfr/jdk.jfr.internal.test
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51991
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* @run main/othervm -XX:TLABSize=2k jdk.jfr.event.oldobject.TestLargeRootSet
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*/
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public class TestLargeRootSet {
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private static final int THREAD_COUNT = 50;
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private static final Random RANDOM = new Random(4711);
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public static Vector<StackObject[]> temporaries = new Vector<>(OldObjects.MIN_SIZE);
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private static class RootThread extends Thread {
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private final CyclicBarrier barrier;
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private int maxDepth = OldObjects.MIN_SIZE / THREAD_COUNT;
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RootThread(CyclicBarrier cb) {
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this.barrier = cb;
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}
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public void run() {
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buildRootObjects();
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}
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private void buildRootObjects() {
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if (maxDepth-- > 0) {
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// Allocate array to trigger sampling code path for interpreter
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// / c1
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StackObject[] stackObject = new StackObject[RANDOM.nextInt(7)];
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temporaries.add(stackObject); // make sure object escapes
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buildRootObjects();
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} else {
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temporaries.clear();
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try {
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barrier.await(); // wait for gc
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barrier.await(); // wait for recording to be stopped
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} catch (InterruptedException e) {
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System.err.println("Thread was unexpected interrupted: " + e.getMessage());
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} catch (BrokenBarrierException e) {
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System.err.println("Unexpected barrier exception: " + e.getMessage());
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}
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return;
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}
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}
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}
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private static class StackObject {
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}
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public static void main(String[] args) throws Exception {
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WhiteBox.setWriteAllObjectSamples(true);
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int attempt = 1;
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while (true) {
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System.out.println();
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System.out.println();
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System.out.println("ATTEMPT: " + attempt);
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System.out.println("====================================");
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List<RootThread> threads = new ArrayList<>();
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try (Recording r = new Recording()) {
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r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
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r.start();
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CyclicBarrier cb = new CyclicBarrier(THREAD_COUNT + 1);
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for (int i = 0; i < THREAD_COUNT; i++) {
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RootThread t = new RootThread(cb);
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t.start();
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if (i % 10 == 0) {
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// Give threads some breathing room before starting next
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// batch
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Thread.sleep(100);
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}
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threads.add(t);
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}
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cb.await();
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System.gc();
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r.stop();
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cb.await();
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List<RecordedEvent> events = Events.fromRecording(r);
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Events.hasEvents(events);
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int sample = 0;
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for (RecordedEvent e : events) {
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RecordedObject ro = e.getValue("object");
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RecordedClass rc = ro.getValue("type");
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System.out.println("Sample: " + sample);
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System.out.println(" - allocationTime: " + e.getInstant("allocationTime"));
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System.out.println(" - type: " + rc.getName());
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RecordedObject root = e.getValue("root");
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if (root != null) {
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System.out.println(" - root:");
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System.out.println(" - description: " + root.getValue("description"));
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System.out.println(" - system: " + root.getValue("system"));
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System.out.println(" - type: " + root.getValue("type"));
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} else {
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System.out.println(" - root: N/A");
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}
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RecordedStackTrace stack = e.getStackTrace();
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if (stack != null) {
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System.out.println(" - stack:");
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int frameCount = 0;
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for (RecordedFrame frame : stack.getFrames()) {
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RecordedMethod m = frame.getMethod();
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System.out.println(" " + m.getType().getName() + "." + m.getName() + "(...)");
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frameCount++;
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if (frameCount == 10) {
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break;
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}
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}
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} else {
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System.out.println(" - stack: N/A");
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}
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System.out.println();
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if (rc.getName().equals(StackObject[].class.getName())) {
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return; // ok
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}
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sample++;
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}
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}
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attempt++;
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}
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}
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}
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