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/*
* Copyright (c) 2007, 2017 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 TestCSLocker
* @key gc
* @bug 6186200
* @summary This short test check RFE 6186200 changes. One thread locked
* @summary completely in JNI CS, while other is trying to allocate memory
* @summary provoking GC. OOM means FAIL, deadlock means PASS.
* @run main/native/othervm -Xmx256m TestCSLocker
*/
public class TestCSLocker extends Thread
{
static int timeout = 5000;
public static void main(String args[]) throws Exception {
long startTime = System.currentTimeMillis();
// start garbage producer thread
GarbageProducer garbageProducer = new GarbageProducer(1000000, 10);
garbageProducer.start();
// start CS locker thread
CSLocker csLocker = new CSLocker();
csLocker.start();
// check timeout to success deadlocking
while(System.currentTimeMillis() < startTime + timeout) {
System.out.println("sleeping...");
sleep(1000);
}
csLocker.unlock();
garbageProducer.interrupt();
}
}
class GarbageProducer extends Thread
{
private int size;
private int sleepTime;
GarbageProducer(int size, int sleepTime) {
this.size = size;
this.sleepTime = sleepTime;
}
public void run() {
boolean isRunning = true;
while (isRunning) {
try {
int[] arr = null;
arr = new int[size];
sleep(sleepTime);
} catch (InterruptedException e) {
isRunning = false;
}
}
}
}
class CSLocker extends Thread
{
static { System.loadLibrary("TestCSLocker"); }
public void run() {
int[] a = new int[10];
a[0] = 1;
if (!lock(a)) {
throw new RuntimeException("failed to acquire CSLock");
}
}
native boolean lock(int[] array);
native void unlock();
}
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