/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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 6296125
* @summary JDI: Disabling an EventRequest can cause a multi-threaded debuggee to hang
*
* @author jjh
*
* @run build TestScaffold VMConnection TargetListener TargetAdapter
* @run compile -g TwoThreadsTest.java
* @run main TwoThreadsTest
*/
/*
* This debuggee basically runs two threads each of
* which loop, hitting a bkpt in each iteration.
*
*/
static boolean one = false;
}
super(name);
}
public void run() {
run1();
} else {
run2();
}
}
public void bkpt1(int i) {
yield();
}
public void run1() {
int i = 0;
while (i < count) {
i++;
bkpt1(i);
}
}
public void bkpt2(int i) {
yield();
}
public void run2() {
int i = 0;
while (i < count) {
i++;
bkpt2(i);
}
}
}
/********** test program **********/
super(args);
}
}
/* BreakpointEvent handler */
if (bkpts == 0) {
/*
* This thread will watch for n secs to go by with no
* calls to this method.
*/
timerThread.start();
}
synchronized("abc") {
/*
* Note that this will most likely never get to
* the number of times the two bkpt lines in the debuggee
* are hit because bkpts are lost while they are disabled.
*/
bkpts++;
}
/*
* The bug occurs when the requests are disabled
* and then re-enabled during the event handler.
*/
/*
* This code between the disables and enables
* is just filler that leaves the requests disabled
* for awhile. I suppose a sleep could be used instead
*/
try {
} catch (AbsentInformationException ee) {
failure("FAILED: can't get local var i");
return;
}
try {
} catch (IncompatibleThreadStateException ee) {
failure("FAILED: bad thread state");
return;
}
}
/********** test core **********/
/*
* Get to the top of main()
* to determine targetClass and mainThread
*/
/*
* Set event requests
*/
/*
* This thread will be started when we get the first bkpt.
* (Which we always expect to get).
* It awakens every n seconds and checks to see if we
* got any breakpoint events while it was asleep.
*/
public void run() {
while (true) {
try {
// no bkpt for 'waitTime' secs
failure("failure: Debuggee appears to be hung");
vmDisconnected = true;
// This awakens the main thread which is
// waiting for a VMDisconnect.
break;
}
} catch (InterruptedException ee) {
// If the test completes, this occurs.
println("timer Interrupted");
break;
}
}
}
};
/*
* resume the target, listening for events
*/
/*
* deal with results of test
* if anything has called failure("foo") testFailed will be true
*/
if (!testFailed) {
} else {
}
}
}