| /* |
| * Copyright (c) 2008, 2015, 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 |
| * @bug 6751643 |
| * @key intermittent |
| * @summary ThreadReference.ownedMonitors() can return null |
| * @author jjh |
| * |
| * @run build TestScaffold VMConnection TargetListener TargetAdapter |
| * @run compile -g SimulResumerTest.java |
| * @run driver SimulResumerTest |
| */ |
| import com.sun.jdi.*; |
| import com.sun.jdi.event.*; |
| import com.sun.jdi.request.*; |
| |
| import java.util.*; |
| |
| /* |
| * This debuggee basically runs two threads each of |
| * which loop, hitting a bkpt in each iteration. |
| * |
| */ |
| class SimulResumerTarg extends Thread { |
| static boolean one = false; |
| static String name1 = "Thread 1"; |
| static String name2 = "Thread 2"; |
| static int count = 10000; |
| public static void main(String[] args) { |
| System.out.println("Howdy!"); |
| SimulResumerTarg t1 = new SimulResumerTarg(name1); |
| SimulResumerTarg t2 = new SimulResumerTarg(name2); |
| |
| t1.start(); |
| t2.start(); |
| } |
| |
| public SimulResumerTarg(String name) { |
| super(name); |
| } |
| |
| public void run() { |
| if (getName().equals(name1)) { |
| run1(); |
| } else { |
| run2(); |
| } |
| } |
| |
| public void bkpt1(int i) { |
| synchronized(name1) { |
| yield(); |
| } |
| } |
| |
| public void run1() { |
| int i = 0; |
| while (i < count) { |
| i++; |
| bkpt1(i); |
| } |
| } |
| |
| public void bkpt2(int i) { |
| synchronized(name2) { |
| yield(); |
| } |
| } |
| |
| public void run2() { |
| int i = 0; |
| while (i < count) { |
| i++; |
| bkpt2(i); |
| } |
| } |
| } |
| |
| /********** test program **********/ |
| |
| public class SimulResumerTest extends TestScaffold { |
| ReferenceType targetClass; |
| ThreadReference mainThread; |
| BreakpointRequest request1; |
| BreakpointRequest request2; |
| static volatile int bkpts = 0; |
| static int iters = 0; |
| Thread resumerThread; |
| static int waitTime = 100; |
| ThreadReference debuggeeThread1 = null; |
| ThreadReference debuggeeThread2 = null; |
| |
| SimulResumerTest (String args[]) { |
| super(args); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new SimulResumerTest(args).startTests(); |
| } |
| |
| /* BreakpointEvent handler */ |
| |
| public void breakpointReached(BreakpointEvent event) { |
| // save ThreadRefs for the two debuggee threads |
| ThreadReference thr = event.thread(); |
| if (bkpts == 0) { |
| resumerThread.start(); |
| debuggeeThread1 = thr; |
| System.out.println("thr1 = " + debuggeeThread1); |
| } |
| |
| if (debuggeeThread2 == null && thr != debuggeeThread1) { |
| debuggeeThread2 = thr; |
| System.out.println("thr2 = " + debuggeeThread2); |
| } |
| |
| synchronized("abc") { |
| bkpts++; |
| } |
| /** |
| if (bkpts >= SimulResumerTarg.count * 2) { |
| resumerThread.interrupt(); |
| } |
| *****/ |
| |
| } |
| |
| /********** test core **********/ |
| |
| void check(ThreadReference thr) { |
| // This calls each ThreadReference method that could fail due to the bug |
| // that occurs if a resume is done while a call to the method is in process. |
| String kind = ""; |
| if (thr != null) { |
| try { |
| kind = "ownedMonitors()"; |
| System.out.println("kind = " + kind); |
| if (thr.ownedMonitors() == null) { |
| failure("failure: ownedMonitors = null"); |
| } |
| |
| kind = "ownedMonitorsAndFrames()"; |
| System.out.println("kind = " + kind); |
| if (thr.ownedMonitorsAndFrames() == null) { |
| failure("failure: ownedMonitorsAndFrames = null"); |
| } |
| |
| kind = "currentContendedMonitor()"; |
| System.out.println("kind = " + kind); |
| thr.currentContendedMonitor(); |
| // no failure return value here; could cause an NPE |
| |
| kind = "frames()"; |
| System.out.println("kind = " + kind); |
| List<StackFrame> frames = thr.frames(); |
| // no failure return value here; could cause an NPE |
| |
| kind = "frames(0, size - 1)"; |
| System.out.println("kind = " + kind); |
| int nframes = frames.size(); |
| while (nframes > 0) { |
| try { |
| thr.frames(0, nframes - 1); |
| break; |
| } catch (IndexOutOfBoundsException iobe) { |
| // 6815126. let's try to get less frames |
| iobe.printStackTrace(); |
| nframes--; |
| } |
| } |
| |
| kind = "frameCount()"; |
| System.out.println("kind = " + kind); |
| if (thr.frameCount() == -1) { |
| failure("failure: frameCount = -1"); |
| } |
| |
| kind = "name()"; |
| System.out.println("kind = " + kind); |
| if (thr.name() == null) { |
| failure("failure: name = null"); |
| } |
| |
| kind = "status()"; |
| System.out.println("kind = " + kind); |
| if (thr.status() < 0) { |
| failure("failure: status < 0"); |
| } |
| |
| } catch (IncompatibleThreadStateException ee) { |
| // ignore |
| } catch (VMDisconnectedException ee) { |
| // This is how we stop. The debuggee runs to completion |
| // and we get this exception. |
| throw ee; |
| } catch (Exception ee) { |
| failure("failure: Got exception from " + kind + ": " + ee ); |
| } |
| } |
| } |
| |
| protected void runTests() throws Exception { |
| /* |
| * Get to the top of main() |
| * to determine targetClass and mainThread |
| */ |
| BreakpointEvent bpe = startToMain("SimulResumerTarg"); |
| targetClass = bpe.location().declaringType(); |
| mainThread = bpe.thread(); |
| EventRequestManager erm = vm().eventRequestManager(); |
| final Thread mainThread = Thread.currentThread(); |
| |
| /* |
| * Set event requests |
| */ |
| Location loc1 = findMethod(targetClass, "bkpt1", "(I)V").location(); |
| Location loc2 = findMethod(targetClass, "bkpt2", "(I)V").location(); |
| request1 = erm.createBreakpointRequest(loc1); |
| request2 = erm.createBreakpointRequest(loc2); |
| request1.enable(); |
| request2.enable(); |
| |
| /* |
| * This thread will be started when we get the first bkpt. |
| */ |
| resumerThread = new Thread("test resumer") { |
| public void run() { |
| while (true) { |
| iters++; |
| System.out.println("bkpts = " + bkpts + ", iters = " + iters); |
| try { |
| Thread.sleep(waitTime); |
| check(debuggeeThread1); |
| check(debuggeeThread2); |
| } catch (InterruptedException ee) { |
| // If the test completes, this occurs. |
| println("resumer Interrupted"); |
| break; |
| } catch (VMDisconnectedException ee) { |
| println("VMDisconnectedException"); |
| break; |
| } |
| } |
| } |
| }; |
| |
| /* |
| * resume the target, listening for events |
| */ |
| listenUntilVMDisconnect(); |
| resumerThread.interrupt(); |
| /* |
| * deal with results of test |
| * if anything has called failure("foo") testFailed will be true |
| */ |
| if (!testFailed) { |
| println("SimulResumerTest: passed; bkpts = " + bkpts + ", iters = " + iters); |
| } else { |
| throw new Exception("SimulResumerTest: failed; bkpts = " + bkpts + ", iters = " + iters); |
| } |
| } |
| } |