257 lines
9.2 KiB
Java
257 lines
9.2 KiB
Java
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package nsk.jvmti.RedefineClasses;
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import java.io.*;
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/**
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* This test checks that <code>if any redefined methods have
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* active stack frames, those active frames continue to run
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* the bytecodes of the original method</code>.<br>
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* It creates an instance of tested class <code>redefclass002r</code>
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* and invokes <code>redefclass002r.activeMethod()</code>.
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* The <code>activeMethod()</code> method is an active frame
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* mentioned above.<br>
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* Then the test invokes native function <code>makeRedefinition()</code>
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* which makes class file redifinition of the loaded class
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* <code>redefclass002r</code>.<br>
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* Bytes of new version of the class <code>redefclass002r</code>
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* are taken from the <i>./newclass</i> directory.<br>
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* Finally, the test checks that the class <code>redefclass002r</code>
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* has been really redefined, and at the same time
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* the <code>activeMethod()</code> method stays original.
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*/
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public class redefclass002 {
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static final int PASSED = 0;
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static final int FAILED = 2;
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static final int JCK_STATUS_BASE = 95;
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static boolean DEBUG_MODE = false;
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static String fileDir = ".";
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private PrintStream out;
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private PipedInputStream pipeIn;
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private PipedOutputStream pipeOut;
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private redefclass002r redefClsObj;
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private runRedefCls runRedefClsThr;
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private volatile Object readyObj = new Object();
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static {
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try {
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System.loadLibrary("redefclass002");
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} catch (UnsatisfiedLinkError e) {
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System.err.println("Could not load redefclass002 library");
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System.err.println("java.library.path:" +
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System.getProperty("java.library.path"));
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throw e;
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}
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}
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native static int makeRedefinition(int vrb, Class redefClass,
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byte[] classBytes);
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native static int suspThread(int vrb, runRedefCls runRedefClsThr);
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native static int resThread(int vrb, runRedefCls runRedefClsThr);
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public static void main(String[] argv) {
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argv = nsk.share.jvmti.JVMTITest.commonInit(argv);
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System.exit(run(argv, System.out) + JCK_STATUS_BASE);
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}
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public static int run(String argv[], PrintStream out) {
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return new redefclass002().runIt(argv, out);
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}
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private int runIt(String argv[], PrintStream out) {
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File newRedefClassFile = null;
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byte[] redefClassBytes;
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int retValue = 0;
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this.out = out;
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for (int i = 0; i < argv.length; i++) {
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String token = argv[i];
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if (token.equals("-v")) // verbose mode
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DEBUG_MODE = true;
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else
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fileDir = token;
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}
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pipeIn = new PipedInputStream();
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pipeOut = new PipedOutputStream();
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redefClsObj = new redefclass002r();
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runRedefClsThr = new runRedefCls(pipeIn, pipeOut,
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out, DEBUG_MODE, redefClsObj);
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synchronized(readyObj) {
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runRedefClsThr.start(); // start a separate thread
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try {
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if (DEBUG_MODE)
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out.println("Waiting until a child thread really starts ...");
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readyObj.wait(); // wait for the thread's readiness
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} catch (InterruptedException e) {
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out.println("TEST FAILED: interrupted while waiting for readiness\n"
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+ "\tof the child thread " + runRedefClsThr.toString()
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+ ": caught " + e);
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shutdown(true);
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return FAILED;
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}
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}
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if (DEBUG_MODE)
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out.println("The child thread successfully started");
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if ((retValue=redefClsObj.checkIt(out, DEBUG_MODE)) == 19) {
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if (DEBUG_MODE)
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out.println("The method checkIt() of OLD redefclass002r was successfully invoked");
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} else {
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out.println("TEST: failed to invoke method redefclass002r.checkIt()");
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shutdown(true);
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return FAILED;
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}
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// try to redefine class redefclass002r
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String fileName = fileDir + File.separator + "newclass" + File.separator +
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redefclass002r.class.getName().replace('.', File.separatorChar) +
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".class";
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if (DEBUG_MODE)
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out.println("Trying to redefine class from the file: " + fileName);
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try {
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FileInputStream in = new FileInputStream(fileName);
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redefClassBytes = new byte[in.available()];
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in.read(redefClassBytes);
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in.close();
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} catch (Exception ex) {
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out.println("# Unexpected exception while reading class file:");
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out.println("# " + ex);
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return FAILED;
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}
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if (DEBUG_MODE)
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retValue=suspThread(1, runRedefClsThr);
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else
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retValue=suspThread(0, runRedefClsThr);
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if (retValue != PASSED) {
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out.println("TEST: failed to suspend a child thread");
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shutdown(true);
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return FAILED;
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}
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// make real redefinition
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if (DEBUG_MODE)
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retValue=makeRedefinition(1, redefClsObj.getClass(),
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redefClassBytes);
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else
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retValue=makeRedefinition(0, redefClsObj.getClass(),
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redefClassBytes);
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if (retValue != PASSED) {
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out.println("TEST: failed to redefine the class");
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resThread(0, runRedefClsThr);
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shutdown(true);
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return FAILED;
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}
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if (DEBUG_MODE)
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retValue=resThread(1, runRedefClsThr);
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else
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retValue=resThread(0, runRedefClsThr);
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if (retValue != PASSED) {
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out.println("TEST: failed to resume a child thread");
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shutdown(true);
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return FAILED;
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}
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if ((retValue=redefClsObj.checkIt(out, DEBUG_MODE)) == 73) {
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if (DEBUG_MODE)
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out.println("The method checkIt() of NEW redefclass002r was successfully invoked");
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} else {
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if (retValue == 19)
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out.println("TEST FAILED: the method redefclass002r.checkIt() is still old");
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else
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out.println("TEST: failed to call method redefclass002r.checkIt()");
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shutdown(true);
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return FAILED;
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}
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int _byte = -1;
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try {
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pipeOut.write(123);
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pipeOut.flush();
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if (DEBUG_MODE)
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out.println("Checking the redefined class ...");
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_byte = pipeIn.read();
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shutdown(true);
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} catch (IOException e) {
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out.println("TEST: failed to work with the pipe: " + e);
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return FAILED;
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}
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if (_byte == 234) {
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if (DEBUG_MODE)
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out.println("The answer \"" + _byte
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+ "\" from the executing method activeMethod()\n\tof the OLD redefclass002r was read as expected");
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return PASSED;
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} else {
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out.println("The answer \"" + _byte
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+ "\" from the executing method activeMethod()\n\tof the NEW redefined redefclass002r was read\n"
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+ "TEST FAILED: an active frame was replaced");
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return FAILED;
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}
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}
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private void shutdown(boolean full) {
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try {
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pipeIn.close();
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pipeOut.close();
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if (full)
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runRedefClsThr.join();
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} catch (Exception e) {
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out.println("TEST: failed to shutdown: caught " + e);
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}
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}
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class runRedefCls extends Thread {
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private PipedInputStream pipeIn;
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private PipedOutputStream pipeOut;
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private PrintStream out;
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private boolean DEBUG_MODE;
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private redefclass002r redefClassObj;
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runRedefCls(PipedInputStream pipeIn, PipedOutputStream pipeOut,
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PrintStream out, boolean verbose, redefclass002r redefClassObj) {
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this.pipeIn = pipeIn;
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this.pipeOut = pipeOut;
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this.out = out;
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DEBUG_MODE = verbose;
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this.redefClassObj = redefClassObj;
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}
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public void run() {
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if (DEBUG_MODE) {
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out.println("runRedefCls: started");
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out.println("runRedefCls: invoking activeMethod() ...");
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}
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redefClassObj.activeMethod(pipeIn, pipeOut, out,
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readyObj, DEBUG_MODE);
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}
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}
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}
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