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Diffstat (limited to 'test/com/sun/jdi/SimulResumerTest.java')
-rw-r--r-- | test/com/sun/jdi/SimulResumerTest.java | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/test/com/sun/jdi/SimulResumerTest.java b/test/com/sun/jdi/SimulResumerTest.java new file mode 100644 index 000000000..cf7568e8b --- /dev/null +++ b/test/com/sun/jdi/SimulResumerTest.java @@ -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); + } + } +} |