| /* |
| * Copyright (c) 2015, 2017, 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. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @test |
| * @summary Call Object.wait() method. Check that monitor information |
| * presented in the stack is correct. Call notifyAll method |
| * monitor info have to disappear from the stack. |
| * Repeats the same scenario calling interrupt() method |
| * @modules java.base/jdk.internal.misc |
| * @library /test/lib |
| * @library ../share |
| * @run main/othervm -XX:+UsePerfData WaitNotifyThreadTest |
| */ |
| import common.ToolResults; |
| import java.util.Iterator; |
| import utils.*; |
| |
| public class WaitNotifyThreadTest { |
| |
| private Object monitor = new Object(); |
| private final String OBJECT = "a java.lang.Object"; |
| private final String OBJECT_WAIT = "java.lang.Object.wait"; |
| |
| interface Action { |
| |
| void doAction(Thread thread); |
| } |
| |
| class ActionNotify implements Action { |
| |
| @Override |
| public void doAction(Thread thread) { |
| //Notify the waiting thread, so it stops waiting and sleeps |
| synchronized (monitor) { |
| monitor.notifyAll(); |
| } |
| } |
| } |
| |
| class ActionInterrupt implements Action { |
| |
| @Override |
| public void doAction(Thread thread) { |
| // Interrupt the thread |
| thread.interrupt(); |
| } |
| } |
| |
| class WaitThread extends Thread { |
| |
| @Override |
| public void run() { |
| try { |
| synchronized (monitor) { |
| monitor.wait(); |
| } |
| } catch (InterruptedException x) { |
| |
| } |
| Utils.sleep(); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new WaitNotifyThreadTest().doTest(); |
| } |
| |
| private void doTest() throws Exception { |
| |
| // Verify stack trace consistency when notifying the thread |
| doTest(new ActionNotify()); |
| |
| // Verify stack trace consistency when interrupting the thread |
| doTest(new ActionInterrupt()); |
| } |
| |
| private void doTest(Action action) throws Exception { |
| |
| final String WAITING_THREAD_NAME = "MyWaitingThread"; |
| |
| // Start athread that just waits |
| WaitThread waitThread = new WaitThread(); |
| waitThread.setName(WAITING_THREAD_NAME); |
| waitThread.start(); |
| |
| // Collect output from the jstack tool |
| JstackTool jstackTool = new JstackTool(ProcessHandle.current().pid()); |
| ToolResults results = jstackTool.measure(); |
| |
| // Analyze the jstack output for the patterns needed |
| JStack jstack1 = new DefaultFormat().parse(results.getStdoutString()); |
| ThreadStack ti1 = jstack1.getThreadStack(WAITING_THREAD_NAME); |
| analyzeThreadStackWaiting(ti1); |
| |
| action.doAction(waitThread); |
| |
| // Collect output from the jstack tool again |
| results = jstackTool.measure(); |
| |
| // Analyze the output again |
| JStack jstack2 = new DefaultFormat().parse(results.getStdoutString()); |
| ThreadStack ti2 = jstack2.getThreadStack(WAITING_THREAD_NAME); |
| analyzeThreadStackNoWaiting(ti2); |
| |
| } |
| |
| private void analyzeThreadStackWaiting(ThreadStack ti1) { |
| Iterator<MethodInfo> it = ti1.getStack().iterator(); |
| |
| String monitorAddress = null; |
| while (it.hasNext()) { |
| MethodInfo mi = it.next(); |
| if (mi.getName().startsWith(OBJECT_WAIT) && mi.getCompilationUnit() == null /*native method*/) { |
| if (mi.getLocks().size() == 1) { |
| MonitorInfo monInfo = mi.getLocks().getFirst(); |
| if (monInfo.getType().equals("waiting on") && compareMonitorClass(monInfo)) { |
| monitorAddress = monInfo.getMonitorAddress(); |
| } else { |
| System.err.println("Error: incorrect monitor info: " + monInfo.getType() + ", " + monInfo.getMonitorClass()); |
| throw new RuntimeException("Incorrect lock record in " |
| + OBJECT_WAIT + " method"); |
| } |
| |
| } else { |
| throw new RuntimeException(OBJECT_WAIT |
| + " method has to contain one lock record bu it contains " + mi.getLocks().size()); |
| } |
| } |
| |
| if (mi.getName().startsWith("WaitThread.run")) { |
| if (monitorAddress == null) { |
| throw new RuntimeException("Cannot found monitor info associated with " + OBJECT_WAIT + " method"); |
| } |
| |
| int numLocks = mi.getLocks().size(); |
| for (int i = 0; i < numLocks - 1; ++i) { |
| assertMonitorInfo("waiting to re-lock in wait()", mi.getLocks().get(i), monitorAddress); |
| } |
| assertMonitorInfo("locked", mi.getLocks().getLast(), monitorAddress); |
| } |
| } |
| |
| } |
| |
| private void assertMonitorInfo(String expectedMessage, MonitorInfo monInfo, String monitorAddress) { |
| if (monInfo.getType().equals(expectedMessage) |
| && compareMonitorClass(monInfo) |
| && monInfo.getMonitorAddress().equals( |
| monitorAddress)) { |
| System.out.println("Correct monitor info found"); |
| } else { |
| System.err.println("Error: incorrect monitor info: " + monInfo.getType() + ", " + monInfo.getMonitorClass() + ", " + monInfo.getMonitorAddress()); |
| System.err.println("Expected: " + expectedMessage + ", a java.lang.Object, " + monitorAddress); |
| throw new RuntimeException("Incorrect lock record in 'run' method"); |
| } |
| } |
| |
| private boolean compareMonitorClass(MonitorInfo monInfo) { |
| // If monitor class info is present in the jstack output |
| // then compare it with the class of the actual monitor object |
| // If there is no monitor class info available then return true |
| return OBJECT.equals(monInfo.getMonitorClass()) || (monInfo.getMonitorClass() == null); |
| } |
| |
| private void analyzeThreadStackNoWaiting(ThreadStack ti2) { |
| Iterator<MethodInfo> it = ti2.getStack().iterator(); |
| |
| while (it.hasNext()) { |
| MethodInfo mi = it.next(); |
| if (mi.getLocks().size() != 0) { |
| throw new RuntimeException("Unexpected lock record in " |
| + mi.getName() + " method"); |
| } |
| } |
| } |
| |
| } |