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/*
* Copyright (c) 2003, 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.PopFrame;
import nsk.share.Wicket;
import java.io.PrintStream;
/**
* This test checks that a frame can be popped and<br>
* no JVMTI events would be generated by the JVMTI function
* <code>PopFrame()</code>.<br>
* The test creates an instance of inner class <code>popFrameCls</code>
* and start it in a separate thread. Then the test pops frame
* from the thread's stack of the class <code>popFrameCls</code>.
*/
public class popframe001 {
static final int PASSED = 0;
static final int FAILED = 2;
static final int JCK_STATUS_BASE = 95;
static volatile boolean popFdone = false;
static volatile int totRes = PASSED;
private PrintStream out;
private popFrameCls popFrameClsThr;
static Object barrier = new Object();
static Wicket startingBarrier;
static {
try {
System.loadLibrary("popframe001");
} catch (UnsatisfiedLinkError e) {
System.err.println("Could not load popframe001 library");
System.err.println("java.library.path:" +
System.getProperty("java.library.path"));
throw e;
}
}
native static int doPopFrame(popFrameCls popFrameClsThr);
native static int suspThread(popFrameCls popFrameClsThr);
native static int resThread(popFrameCls popFrameClsThr);
public static void main(String[] argv) {
argv = nsk.share.jvmti.JVMTITest.commonInit(argv);
System.exit(run(argv, System.out) + JCK_STATUS_BASE);
}
public static int run(String argv[], PrintStream out) {
return new popframe001().runIt(argv, out);
}
private int runIt(String argv[], PrintStream out) {
int retValue = 0;
this.out = out;
popFrameClsThr = new popFrameCls("Tested Thread");
startingBarrier = new Wicket();
// start the child thread
popFrameClsThr.start();
startingBarrier.waitFor();
// pause until the child thread exits notification-block
synchronized (barrier) {
}
out.println("Going to suspend the thread...");
retValue = suspThread(popFrameClsThr);
if (retValue != PASSED) {
out.println("TEST: failed to suspend thread");
return FAILED;
}
// pop a frame of the child thread
out.println("Going to pop a frame...");
retValue = doPopFrame(popFrameClsThr);
popFdone = true;
popFrameClsThr.letItGo();
if (retValue != PASSED) {
out.println("TEST: failed to pop frame");
resThread(popFrameClsThr);
return FAILED;
}
out.println("Going to resume the thread...");
retValue = resThread(popFrameClsThr);
if (retValue != PASSED) {
out.println("TEST: failed to resume thread");
return FAILED;
}
try {
popFrameClsThr.join();
} catch (InterruptedException e) {
out.println("TEST INCOMPLETE: caught " + e);
return FAILED;
}
return totRes;
}
class popFrameCls extends Thread {
private volatile boolean flag = true;
popFrameCls(String name) {
super(name);
}
public void run() {
activeMethod();
out.println("popFrameCls (" + this + "): exiting...");
}
public void activeMethod() {
boolean compl = true; // complain in a finally block
if (popframe001.popFdone) { // popping has been done
out.println("popFrameCls (" + this + "): enter activeMethod() after popping");
return;
}
try {
// notify the main thread
synchronized (popframe001.barrier) {
out.println("popFrameCls (" + this + "): notifying main thread");
popframe001.startingBarrier.unlock();
out.println("popFrameCls (" + this + "): inside activeMethod()");
}
// loop until the main thread pops us
int i = 0;
int n = 1000;
while (flag) {
if (n <= 0) {
n = 1000;
}
if (i > n) {
i = 0;
n--;
}
i++;
}
if (popframe001.popFdone) { // popping has been done
out.println("TEST FAILED: a tested frame has not been really popped");
popframe001.totRes = FAILED;
compl = false;
}
} catch (Exception e) {
out.println("FAILURE: popFrameCls (" + this + "): caught " + e);
popframe001.totRes = FAILED;
compl = false;
} finally {
if (compl) {
out.println("TEST FAILED: finally block was executed after PopFrame()");
popframe001.totRes = FAILED;
}
}
}
public void letItGo() {
flag = false;
}
}
}
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