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/*
* Copyright (c) 2006, 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 6485605
* @summary com.sun.jdi.InternalException: Inconsistent suspend policy in internal event handler
* @author jjh
*
* @run build TestScaffold VMConnection TargetListener TargetAdapter
* @run compile -g SuspendThreadTest.java
* @run driver SuspendThreadTest
*/
import com.sun.jdi.*;
import com.sun.jdi.event.*;
import com.sun.jdi.request.*;
/********** target program **********/
class SuspendThreadTarg {
public static long count;
public static boolean active = true;
public static void bkpt() {
count++;
}
public static void main(String[] args){
System.out.println("Howdy!");
// We need this to be running so the bkpt
// can be hit immediately when it is enabled
// in the back-end.
while(active) {
bkpt();
}
System.out.println("Goodbye from SuspendThreadTarg, count = " + count);
}
}
/********** test program **********/
public class SuspendThreadTest extends TestScaffold {
ClassType targetClass;
ThreadReference mainThread;
SuspendThreadTest (String args[]) {
super(args);
}
public static void main(String[] args) throws Exception {
new SuspendThreadTest(args).startTests();
}
/********** event handlers **********/
// 1000 makes the test take over 2 mins on win32
static int maxBkpts = 200;
volatile int bkptCount;
// to guard against spurious wakeups from bkptSignal.wait()
boolean signalSent;
// signal that a breakpoint has happened
final private Object bkptSignal = new Object() {};
BreakpointRequest bkptRequest;
Field debuggeeCountField, debuggeeActiveField;
// When we get a bkpt we want to disable the request,
// resume the debuggee, and then re-enable the request
public void breakpointReached(BreakpointEvent event) {
System.out.println("Got BreakpointEvent: " + bkptCount +
", debuggeeCount = " +
((LongValue)targetClass.
getValue(debuggeeCountField)).value()
);
bkptRequest.disable();
}
public void eventSetComplete(EventSet set) {
set.resume();
// The main thread watchs the bkptCount to
// see if bkpts stop coming in. The
// test _should_ fail well before maxBkpts bkpts.
synchronized (bkptSignal) {
if (bkptCount++ < maxBkpts) {
bkptRequest.enable();
}
signalSent = true;
bkptSignal.notifyAll();
}
}
public void vmDisconnected(VMDisconnectEvent event) {
println("Got VMDisconnectEvent");
}
/********** test core **********/
protected void runTests() throws Exception {
try {
/*
* Get to the top of main()
* to determine targetClass and mainThread
*/
BreakpointEvent bpe = startToMain("SuspendThreadTarg");
targetClass = (ClassType)bpe.location().declaringType();
mainThread = bpe.thread();
EventRequestManager erm = vm().eventRequestManager();
Location loc1 = findMethod(targetClass, "bkpt", "()V").location();
bkptRequest = erm.createBreakpointRequest(loc1);
// Without this, it is a SUSPEND_ALL bkpt and the test will pass
bkptRequest.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
bkptRequest.enable();
debuggeeCountField = targetClass.fieldByName("count");
debuggeeActiveField = targetClass.fieldByName("active");
try {
addListener (this);
} catch (Exception ex){
ex.printStackTrace();
failure("failure: Could not add listener");
throw new Exception("SuspendThreadTest: failed", ex);
}
int prevBkptCount;
vm().resume();
synchronized (bkptSignal) {
while (bkptCount < maxBkpts) {
prevBkptCount = bkptCount;
// If we don't get a bkpt within 5 secs,
// the test fails
signalSent = false;
do {
try {
bkptSignal.wait(5000);
} catch (InterruptedException ee) {
}
} while (signalSent == false);
if (prevBkptCount == bkptCount) {
failure("failure: test hung");
break;
}
}
}
println("done with loop");
bkptRequest.disable();
removeListener(this);
/*
* deal with results of test
* if anything has called failure("foo") testFailed will be true
*/
if (!testFailed) {
println("SuspendThreadTest: passed");
} else {
throw new Exception("SuspendThreadTest: failed");
}
} finally {
if (targetClass != null && debuggeeActiveField != null) {
targetClass.setValue(debuggeeActiveField, vm().mirrorOf(false));
}
}
}
}
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