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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.bcel.generic;
import static com.sun.jna.platform.win32.WinReg.HKEY_LOCAL_MACHINE;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.fail;
import java.io.File;
import java.io.FileFilter;
import java.io.InputStream;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.apache.bcel.classfile.ClassParser;
import org.apache.bcel.classfile.Code;
import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.classfile.Method;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.SystemUtils;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import com.sun.jna.platform.win32.Advapi32Util;
/**
* Test that the generic dump() methods work on the JDK classes Reads each class into an instruction list and then dumps
* the instructions. The output bytes should be the same as the input.
*/
@RunWith(Parameterized.class)
public class JDKGenericDumpTestCase {
private static final String KEY_JDK = "SOFTWARE\\JavaSoft\\Java Development Kit";
private static final String KEY_JDK_9 = "SOFTWARE\\JavaSoft\\JDK";
private static final String KEY_JRE = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
private static final String KEY_JRE_9 = "SOFTWARE\\JavaSoft\\JRE";
@Parameters(name = "{0}")
public static Collection<String> data() {
return findJavaHomes();
}
private static Set<String> findJavaHomes() {
if (SystemUtils.IS_OS_WINDOWS) {
return findJavaHomesOnWindows();
}
final Set<String> javaHomes = new HashSet<>(1);
javaHomes.add(SystemUtils.JAVA_HOME);
return javaHomes;
}
private static Set<String> findJavaHomesOnWindows() {
Set<String> javaHomes = new HashSet<>();
addAllJavaHomesOnWindows(KEY_JRE, javaHomes);
addAllJavaHomesOnWindows(KEY_JRE_9, javaHomes);
addAllJavaHomesOnWindows(KEY_JDK, javaHomes);
addAllJavaHomesOnWindows(KEY_JDK_9, javaHomes);
return javaHomes;
}
private static void addAllJavaHomesOnWindows(final String keyJre, Set<String> javaHomes) {
javaHomes.addAll(findJavaHomesOnWindows(keyJre, Advapi32Util.registryGetKeys(HKEY_LOCAL_MACHINE, keyJre)));
}
private static Set<String> findJavaHomesOnWindows(String keyJavaHome, final String[] keys) {
final Set<String> javaHomes = new HashSet<>(keys.length);
for (final String key : keys) {
if (Advapi32Util.registryKeyExists(HKEY_LOCAL_MACHINE, keyJavaHome + "\\" + key)) {
final String javaHome = Advapi32Util.registryGetStringValue(HKEY_LOCAL_MACHINE,
keyJavaHome + "\\" + key, "JavaHome");
if (StringUtils.isNoneBlank(javaHome)) {
if (new File(javaHome).exists()) {
javaHomes.add(javaHome);
}
}
}
}
return javaHomes;
}
public JDKGenericDumpTestCase(final String javaHome) {
this.javaHome = javaHome;
}
private final String javaHome;
@Test
public void testJDKjars() throws Exception {
final File[] jars = listJDKjars();
if (jars != null) {
for (final File file : jars) {
testJar(file);
}
}
}
private void testJar(final File file) throws Exception {
System.out.println(file);
try (JarFile jar = new JarFile(file)) {
final Enumeration<JarEntry> en = jar.entries();
while (en.hasMoreElements()) {
final JarEntry e = en.nextElement();
final String name = e.getName();
if (name.endsWith(".class")) {
// System.out.println("- " + name);
try (InputStream in = jar.getInputStream(e)) {
final ClassParser parser = new ClassParser(in, name);
final JavaClass jc = parser.parse();
for (final Method m : jc.getMethods()) {
compare(name, m);
}
}
}
}
}
}
private void compare(final String name, final Method m) {
// System.out.println("Method: " + m);
final Code c = m.getCode();
if (c == null) {
return; // e.g. abstract method
}
final byte[] src = c.getCode();
final InstructionList il = new InstructionList(src);
final byte[] out = il.getByteCode();
if (src.length == out.length) {
assertArrayEquals(name + ": " + m.toString(), src, out);
} else {
System.out.println(name + ": " + m.toString() + " " + src.length + " " + out.length);
System.out.println(bytesToHex(src));
System.out.println(bytesToHex(out));
for (final InstructionHandle ih : il) {
System.out.println(ih.toString(false));
}
fail("Array comparison failure");
}
}
private File[] listJDKjars() throws Exception {
final File javaLib = new File(javaHome, "lib");
return javaLib.listFiles(new FileFilter() {
@Override
public boolean accept(final File file) {
return file.getName().endsWith(".jar");
}
});
}
private static final char[] hexArray = "0123456789ABCDEF".toCharArray();
private static String bytesToHex(final byte[] bytes) {
final char[] hexChars = new char[bytes.length * 3];
int i = 0;
for (final byte b : bytes) {
final int v = b & 0xFF;
hexChars[i++] = hexArray[v >>> 4];
hexChars[i++] = hexArray[v & 0x0F];
hexChars[i++] = ' ';
}
return new String(hexChars);
}
}
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