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/*
* Copyright (c) 2017, 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.
*
*/
import java.lang.instrument.ClassDefinition;
import java.lang.instrument.Instrumentation;
import java.lang.instrument.UnmodifiableClassException;
import java.net.URL;
import java.net.URLClassLoader;
import java.io.File;
import java.security.CodeSigner;
import java.security.CodeSource;
import java.security.ProtectionDomain;
import sun.hotspot.WhiteBox;
public class RedefineClassApp {
static WhiteBox wb = WhiteBox.getWhiteBox();
public static interface Intf { // Loaded from Boot class loader (-Xbootclasspath/a).
public String get();
}
public static class Bar implements Intf { // Loaded from Boot class loader.
public String get() {
return "buzz";
}
}
public static class Foo implements Intf { // Loaded from AppClassLoader
public String get() {
return "buzz";
}
}
static int numTests = 0;
static int failed = 0;
static Instrumentation instrumentation;
public static void main(String args[]) throws Throwable {
if (wb.areSharedStringsIgnored()) {
System.out.println("Shared strings are ignored.");
return;
}
File bootJar = new File(args[0]);
File appJar = new File(args[1]);
instrumentation = InstrumentationRegisterClassFileTransformer.getInstrumentation();
System.out.println("INFO: instrumentation = " + instrumentation);
testBootstrapCDS("Bootstrap Loader", bootJar);
testAppCDSv1("Application Loader", appJar);
if (failed > 0) {
throw new RuntimeException("FINAL RESULT: " + failed + " out of " + numTests + " test case(s) have failed");
} else {
System.out.println("FINAL RESULT: All " + numTests + " test case(s) have passed!");
}
// Full GC. The cached objects in adjustable archive heap regions are
// scanned. The archive regions are verified. No error should be
// reported.
wb.fullGC();
}
static void testBootstrapCDS(String group, File jar) throws Throwable {
doTest(group, new Bar(), jar);
}
static void testAppCDSv1(String group, File jar) throws Throwable {
doTest(group, new Foo(), jar);
}
static void checkArchivedMirrorObject(Class klass) {
if (wb.areOpenArchiveHeapObjectsMapped()) {
if (!wb.isShared(klass)) {
failed ++;
System.out.println("FAILED. " + klass + " mirror object is not archived");
return;
}
}
}
static void doTest(String group, Intf object, File jar) throws Throwable {
numTests ++;
Class klass = object.getClass();
System.out.println();
System.out.println("++++++++++++++++++++++++++");
System.out.println("Test group: " + group);
System.out.println("Testing with classloader = " + klass.getClassLoader());
System.out.println("Testing with class = " + klass);
System.out.println("Test is shared = " + wb.isSharedClass(klass));
System.out.println("++++++++++++++++++++++++++");
// Check archived mirror object before redefine
checkArchivedMirrorObject(klass);
// Call get() before redefine. All strings in archived classes are shared.
String res = object.get();
System.out.println("get() returns " + res);
if (res.equals("buzz") && wb.isShared(res)) {
System.out.println("get() returns " + res + ", string is shared");
} else {
if (!res.equals("buzz")) {
System.out.println("FAILED. buzz is expected but got " + res);
} else {
System.out.println("FAILED. " + res + " is not shared");
}
failed ++;
return;
}
res = null; // release the local reference to the string
// Run GC
System.gc();
System.gc();
System.gc();
// Redefine the shared class
byte[] buff = Util.getClassFileFromJar(jar, klass.getName());
Util.replace(buff, "buzz", "huzz");
String f = "(failed)";
try {
instrumentation.redefineClasses(new ClassDefinition(klass, buff));
f = object.get();
} catch (UnmodifiableClassException|UnsupportedOperationException e) {
e.printStackTrace();
}
if (f.equals("huzz")) {
System.out.println("PASSED: object.get() after redefinition returns " + f);
} else {
System.out.println("FAILED: object.get() after redefinition returns " + f);
failed ++;
}
// Run GC. Should not crash.
System.gc();
System.gc();
System.gc();
// Check archived mirror object after redefine and GC
checkArchivedMirrorObject(klass);
System.out.println("++++++++++++++++++++++++++++++++++++++++++++++++ (done)\n\n");
}
}
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