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/*
* Copyright (c) 2003, 2022, 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 java.io.*;
/**
* This test checks that a method's frame can not be popped by the JVMTI
* function <code>PopFrame()</code>:
* <li>with intermediate native frames, and a thread, from which
* the PopFrame() was called, is different than the current thread
* <li>from the current thread with intermediate native frames
* <li>no JVMTI events will be generated by the function <code>PopFrame()</code>
*
* Fixed according to the 4528173 bug:
* for now the test checks that a native frame may not be poped.
*/
public class popframe004 {
public static final int PASSED = 0;
public static final int FAILED = 2;
static final int JCK_STATUS_BASE = 95;
static volatile boolean popFdone = false;
static volatile boolean popF2done = false;
static volatile int totRes = PASSED;
private PrintStream out;
private popFrameCls popFrameClsThr;
static Object barrier = new Object(); // for suspending a child thread
static {
try {
System.loadLibrary("popframe004");
} catch (UnsatisfiedLinkError e) {
System.err.println("Could not load popframe004 library");
System.err.println("java.library.path:" +
System.getProperty("java.library.path"));
throw e;
}
}
native void nativeMeth(popFrameCls popFrameClsThr);
native static int doPopFrame(boolean otherThread, Thread popFrameClsThr);
native static int getResult();
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 popframe004().runIt(argv, out);
}
private int runIt(String argv[], PrintStream out) {
int retValue = 0;
this.out = out;
PipedInputStream pipeIn = new PipedInputStream();
popFrameClsThr = new popFrameCls(pipeIn);
synchronized (barrier) { // force a child thread to pause
popFrameClsThr.start(); // start a separate thread
// wait until the thread will enter into a necessary method
try {
int _byte = pipeIn.read();
} catch (IOException e) {
out.println("TEST FAILED: reading from a pipe: caught " + e);
return FAILED;
}
// pop the frame
if (popFrameClsThr.isAlive()) {
out.println("Going to pop the frame on other thread...");
retValue = doPopFrame(true, popFrameClsThr);
popFdone = true;
if (retValue != PASSED)
return FAILED;
}
else {
out.println("TEST FAILURE: thread with the method of " +
"the popped frame is dead");
return FAILED;
}
}
try {
if (popFrameClsThr.isAlive())
popFrameClsThr.join();
} catch (InterruptedException e) {
out.println("TEST INCOMPLETE: caught " + e);
totRes = FAILED;
}
if (popFrameClsThr.isAlive()) {
out.println("TEST FAILED: thread with the method of " +
"the popped frame is still alive");
totRes = FAILED;
}
out.println("Going to pop the native frame on the current thread...");
totRes = doPopFrame(false, Thread.currentThread());
if (totRes != PASSED)
return FAILED;
else return getResult();
}
class popFrameCls extends Thread {
private PipedOutputStream pipeOut;
popFrameCls(PipedInputStream pipeIn) {
try {
pipeOut = new PipedOutputStream(pipeIn);
} catch (IOException e) {
out.println("popFrameCls (" + this +
"): creating a pipe: caught " + e);
return;
}
}
public void run() {
nativeMeth(popFrameClsThr);
out.println("popFrameCls (" + this + "): exiting...");
}
public void activeMethod() {
int retVal = FAILED;
boolean compl = true;
try {
out.println("popFrameCls (" + this + "): inside activeMethod()");
pipeOut.write(123); // notify the main thread
// pause here until the main thread suspends us
synchronized (popframe004.barrier) {
while (true) {
out.println("popFrameCls (" + this + "): looping...");
if (popframe004.popFdone) { // popping has been done
// popping has not to be done due to native frame
out.println("popFrameCls (" + this + "): exiting activeMethod()...");
compl = false;
return;
}
}
}
} catch (Exception e) {
out.println("FAILURE: popFrameCls (" + this + "): caught " + e);
popframe004.totRes = FAILED;
compl = false;
} finally {
if (compl) {
out.println("TEST FAILED: finally block was executed after popping");
popframe004.totRes = FAILED;
}
}
}
}
}
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