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/*
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* Copyright (c) 2013, 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.api.consumer;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.time.Duration;
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import java.util.ArrayList;
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import java.util.List;
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import jdk.jfr.Recording;
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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.RecordedStackTrace;
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import jdk.jfr.consumer.RecordingFile;
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import jdk.test.lib.Asserts;
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import jdk.test.lib.jfr.EventNames;
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import jdk.test.lib.jfr.Events;
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import jdk.test.lib.jfr.RecurseThread;
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/*
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* @test
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* @key jfr
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* @library /test/lib
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* @run main/othervm jdk.jfr.api.consumer.TestRecordedFullStackTrace
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*/
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public class TestRecordedFullStackTrace {
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private final static String EVENT_NAME = EventNames.ExecutionSample;
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private final static int MAX_DEPTH = 64; // currently hardcoded in jvm
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public static void main(String[] args) throws Throwable {
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RecurseThread[] threads = new RecurseThread[3];
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for (int i = 0; i < threads.length; ++i) {
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int depth = MAX_DEPTH - 1 + i;
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threads[i] = new RecurseThread(depth);
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threads[i].setName("recursethread-" + depth);
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threads[i].start();
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}
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for (RecurseThread thread : threads) {
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while (!thread.isInRunLoop()) {
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Thread.sleep(20);
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}
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}
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assertStackTraces(threads);
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for (RecurseThread thread : threads) {
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thread.quit();
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thread.join();
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}
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}
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private static void assertStackTraces(RecurseThread[] threads) throws Throwable {
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Path path = null;
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do {
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Recording recording = new Recording();
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recording.enable(EVENT_NAME).withPeriod(Duration.ofMillis(50));
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recording.start();
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Thread.sleep(500);
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recording.stop();
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// Dump the recording to a file
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path = Files.createTempFile("recording", ".jfr");
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System.out.println("Dumping to " + path);
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recording.dump(path);
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recording.close();
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} while (!hasValidStackTraces(path, threads));
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}
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private static boolean hasValidStackTraces(Path path, RecurseThread[] threads) throws Throwable {
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boolean[] isEventFound = new boolean[threads.length];
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for (RecordedEvent event : RecordingFile.readAllEvents(path)) {
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//System.out.println("Event: " + event);
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String threadName = Events.assertField(event, "sampledThread.javaName").getValue();
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long threadId = Events.assertField(event, "sampledThread.javaThreadId").getValue();
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for (int threadIndex = 0; threadIndex < threads.length; ++threadIndex) {
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RecurseThread currThread = threads[threadIndex];
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if (threadId == currThread.getId()) {
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System.out.println("ThreadName=" + currThread.getName() + ", depth=" + currThread.totalDepth);
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Asserts.assertEquals(threadName, currThread.getName(), "Wrong thread name");
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if ("recurseEnd".equals(getTopMethodName(event))) {
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isEventFound[threadIndex] = true;
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checkEvent(event, currThread.totalDepth);
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break;
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}
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}
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}
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}
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for (int i = 0; i < threads.length; ++i) {
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String msg = "threadIndex=%d, recurseDepth=%d, isEventFound=%b%n";
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System.out.printf(msg, i, threads[i].totalDepth, isEventFound[i]);
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}
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for (int i = 0; i < threads.length; ++i) {
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if (!isEventFound[i]) {
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// no assertion, let's retry.
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// Could be race condition, i.e safe point during Thread.sleep
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System.out.println("Falied to validate all threads, will retry.");
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return false;
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}
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}
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return true;
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}
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public static String getTopMethodName(RecordedEvent event) {
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List<RecordedFrame> frames = event.getStackTrace().getFrames();
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Asserts.assertFalse(frames.isEmpty(), "JavaFrames was empty");
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return frames.get(0).getMethod().getName();
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}
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private static void checkEvent(RecordedEvent event, int expectedDepth) throws Throwable {
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RecordedStackTrace stacktrace = null;
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try {
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stacktrace = event.getStackTrace();
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List<RecordedFrame> frames = stacktrace.getFrames();
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Asserts.assertEquals(Math.min(MAX_DEPTH, expectedDepth), frames.size(), "Wrong stacktrace depth. Expected:" + expectedDepth);
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List<String> expectedMethods = getExpectedMethods(expectedDepth);
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Asserts.assertEquals(expectedMethods.size(), frames.size(), "Wrong expectedMethods depth. Test error.");
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for (int i = 0; i < frames.size(); ++i) {
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String name = frames.get(i).getMethod().getName();
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String expectedName = expectedMethods.get(i);
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System.out.printf("method[%d]=%s, expected=%s%n", i, name, expectedName);
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Asserts.assertEquals(name, expectedName, "Wrong method name");
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}
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boolean isTruncated = stacktrace.isTruncated();
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boolean isTruncateExpected = expectedDepth > MAX_DEPTH;
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Asserts.assertEquals(isTruncated, isTruncateExpected, "Wrong value for isTruncated. Expected:" + isTruncateExpected);
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String firstMethod = frames.get(frames.size() - 1).getMethod().getName();
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boolean isFullTrace = "run".equals(firstMethod);
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String msg = String.format("Wrong values for isTruncated=%b, isFullTrace=%b", isTruncated, isFullTrace);
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Asserts.assertTrue(isTruncated != isFullTrace, msg);
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} catch (Throwable t) {
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System.out.println(String.format("stacktrace:%n%s", stacktrace));
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throw t;
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}
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}
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private static List<String> getExpectedMethods(int depth) {
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List<String> methods = new ArrayList<>();
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methods.add("recurseEnd");
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for (int i = 0; i < depth - 2; ++i) {
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methods.add((i % 2) == 0 ? "recurseA" : "recurseB");
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}
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methods.add("run");
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if (depth > MAX_DEPTH) {
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methods = methods.subList(0, MAX_DEPTH);
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}
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return methods;
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}
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}
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