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/*
* Copyright (c) 2004, 2018, 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.
*/
package nsk.jvmti.GetOwnedMonitorInfo;
import nsk.share.Wicket;
import java.io.PrintStream;
public class ownmoninf001 {
final static int JCK_STATUS_BASE = 95;
native static void checkMon0(int point, Thread thr);
native static void checkMon1(int point, Thread thr, Object o1);
native static void checkMon2(int point, Thread thr, Object o1, Object o2);
native static int getRes();
public static Wicket waitingBarrier;
public static Wicket startingBarrier;
static Object lockFld = new Object();
static boolean DEBUG_MODE = false;
static PrintStream out;
public static void main(String[] args) {
args = nsk.share.jvmti.JVMTITest.commonInit(args);
System.exit(run(args, System.out) + JCK_STATUS_BASE);
}
public static int run(String argv[], PrintStream ref) {
out = ref;
for (int i = 0; i < argv.length; i++) {
if (argv[i].equals("-v")) // verbose mode
DEBUG_MODE = true;
}
Object lock = new Object();
Thread currThr = Thread.currentThread();
if (DEBUG_MODE)
out.println("\nCheck #1: verifying owned monitors of current thread \""
+ currThr.getName() + "\" ...");
checkMon0(1, currThr);
if (DEBUG_MODE)
out.println("Check #1 done");
synchronized (lock) {
synchronized (lock) {
if (DEBUG_MODE)
out.println("\nCheck #2: verifying owned monitors of current thread \""
+ currThr.getName() + "\" ...");
checkMon1(2, currThr, lock);
if (DEBUG_MODE)
out.println("Check #2 done");
}
}
ownmoninf001a thr = new ownmoninf001a();
startingBarrier = new Wicket();
waitingBarrier = new Wicket();
thr.setDaemon(true);
thr.start();
if (DEBUG_MODE)
out.println("Waiting for notification from auxiliary thread ...");
startingBarrier.waitFor();
if (DEBUG_MODE) {
out.println("Got the notification from auxiliary thread\n");
out.println("Check #3: verifying owned monitors of auxiliary thread ...");
}
synchronized (thr.lock) {
while (!thr.isWaiting) {
try {
thr.lock.wait(100);
} catch (InterruptedException ex) {
// skip it
}
}
// Now we know it is waiting
checkMon0(3, thr);
if (DEBUG_MODE)
out.println("Check #3 done\nNotifying auxiliary thread ...");
thr.lock.notify();
thr.wasNotified = true;
}
if (DEBUG_MODE)
out.println("Waiting for notification from auxiliary thread ...");
waitingBarrier.waitFor();
// Check #4 is commented out because the check result is non-deterministic.
// checkMon2(4, thr, thr, lockFld);
thr.letItGo();
try {
thr.join();
} catch (InterruptedException e) {
throw new Error("Unexpected " + e);
}
return getRes();
}
}
class ownmoninf001a extends Thread {
public boolean isWaiting = false;
public boolean wasNotified = false;
public Object lock = new Object();
private volatile boolean flag = true;
public void letItGo() {
flag = false;
}
private synchronized void meth() {
synchronized (ownmoninf001.lockFld) {
ownmoninf001.waitingBarrier.unlock();
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a.meth: going to loop until main thread changes <flag> ...");
int i = 0;
int n = 1000;
while (flag) {
if (n <= 0) {
n = 1000;
}
if (i > n) {
i = 0;
n--;
}
i++;
}
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a.meth: check #5: verifying own monitors of current auxiliary thread ...");
ownmoninf001.checkMon2(5, currentThread(), this, ownmoninf001.lockFld);
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a.meth: check #5 done");
}
}
public void run() {
synchronized (lock) {
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a: notifying main thread ...");
ownmoninf001.startingBarrier.unlock();
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a: check #6: verifying own monitors of current auxiliary thread ...");
ownmoninf001.checkMon1(6, currentThread(), lock);
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a: check #6 done");
try {
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a: releasing <lock> and waiting for notification ...");
isWaiting = true;
while (!wasNotified) { // handling spurious wakeups
lock.wait();
}
wasNotified = false;
isWaiting = false;
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a: got the notification");
} catch (InterruptedException e) {
throw new Error("ownmoninf001a: unexpected " + e);
}
}
meth();
if (ownmoninf001.DEBUG_MODE)
ownmoninf001.out.println("ownmoninf001a: thread exiting");
}
}
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