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