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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.CompiledMethodUnload;
import java.io.*;
import java.math.*;
import java.util.*;
import nsk.share.*;
import nsk.share.jvmti.*;
/**
* This test exercises the JVMTI event <code>CompiledMethodUnload</code>.
* <br>It creates an instance of tested class 'HotClass'. Then special
* 'hot' methods are called in a loop in order to be compiled/inlined.
* Then the class is provoked to be unloaded and, thus, CompiledMethodUnload
* events generation for the compiled methods mentioned above.<br>
* The CompiledMethodUnload events, if they occur, must be sent only
* during the live phase of the VM execution.
*/
public class compmethunload001 {
/**
* class signature to be loaded and then unloaded
*/
private final static String CLS_TO_BE_UNLOADED =
"nsk.jvmti.CompiledMethodUnload.compmethunload001u";
private final static int MAX_ITERATIONS = 5;
static {
try {
System.loadLibrary("compmethunload001");
} catch (UnsatisfiedLinkError ule) {
System.err.println("Could not load \"compmethunload001\" library");
System.err.println("java.library.path:"
+ System.getProperty("java.library.path"));
throw ule;
}
}
native int check();
native int unloaded();
public static void main(String[] argv) throws Exception {
argv = nsk.share.jvmti.JVMTITest.commonInit(argv);
// produce JCK-like exit status
System.exit(run(argv, System.out) + Consts.JCK_STATUS_BASE);
}
public static int run(String argv[], PrintStream out) throws Exception {
return new compmethunload001().runThis(argv, out);
}
public static void callHotClass(String location) throws Exception {
String clsDir = location + File.separator + "loadclass";
ClassUnloader clsUnLoader = new ClassUnloader();
// load the class
System.out.println("\nTrying to load class from "
+ clsDir + " ...");
clsUnLoader.loadClass(CLS_TO_BE_UNLOADED, clsDir);
Class<?> c = clsUnLoader.getLoadedClass();
Object hotCls = c.newInstance();
// Call hot methods that get compiled
c.getMethod("entryMethod").invoke(hotCls);
c.getMethod("entryNewMethod").invoke(hotCls);
// provoke unloading of previously compiled methods
hotCls = null;
c = null;
boolean clsUnloaded = clsUnLoader.unloadClass();
clsUnLoader = null;
System.gc();
}
private int runThis(String argv[], PrintStream out) throws Exception {
ArgumentHandler argHandler = new ArgumentHandler(argv);
String args[] = argHandler.getArguments();
if (args.length < 1)
throw new Failure("TEST BUG: path for class to be loaded is not specified");
callHotClass(args[0]);
// Wait until something is unloaded
int num = unloaded();
int iter = 0;
while (num == 0) {
System.gc();
num = unloaded();
iter++;
if (iter > MAX_ITERATIONS) {
throw new Failure("PRODUCT BUG: class was not unloaded in " + MAX_ITERATIONS);
}
}
System.out.println("Number of unloaded events " + num + " number of iterations " + iter);
return check();
}
}
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