--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/com/sun/jdi/SimulResumerTest.java Thu Oct 02 18:23:23 2008 -0700
@@ -0,0 +1,278 @@
+/*
+ * Copyright 2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 6751643
+ * @summary ThreadReference.ownedMonitors() can return null
+ *
+ * @author jjh
+ *
+ * @run build TestScaffold VMConnection TargetListener TargetAdapter
+ * @run compile -g SimulResumerTest.java
+ * @run main 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
+
+ int nframes = frames.size();
+ if (nframes > 0) {
+ // hmm, how could it ever be 0?
+ kind = "frames(0, size - 1)";
+ System.out.println("kind = " + kind);
+ thr.frames(0, frames.size() - 1);
+ }
+
+ 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);
+ }
+ }
+}