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/*
* Copyright (c) 2014, 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.
*
*/
/*
* @test
* @summary classes with major version < JDK_6 (50) should not be included in CDS
* @requires vm.cds
* @library /test/lib
* @modules java.base/jdk.internal.org.objectweb.asm
* java.base/jdk.internal.misc
* java.management
* jdk.jartool/sun.tools.jar
* @compile test-classes/Hello.java
* @run build TestCommon JarBuilder
* @run main OldClassTest
*/
import java.io.File;
import java.io.FileOutputStream;
import jdk.test.lib.process.OutputAnalyzer;
import java.nio.file.Files;
import java.util.*;
import jdk.internal.org.objectweb.asm.*;
public class OldClassTest implements Opcodes {
public static void main(String[] args) throws Exception {
File jarSrcFile = new File(JarBuilder.getOrCreateHelloJar());
File dir = new File(System.getProperty("test.classes", "."));
File jarFile = new File(dir, "OldClassTest_old.jar");
String jar = jarFile.getPath();
if (!jarFile.exists() || jarFile.lastModified() < jarSrcFile.lastModified()) {
createTestJarFile(jarSrcFile, jarFile);
} else {
System.out.println("Already up-to-date: " + jarFile);
}
String appClasses[] = TestCommon.list("Hello");
// CASE 1: pre-JDK 6 compiled classes should be excluded from the dump
OutputAnalyzer output = TestCommon.dump(jar, appClasses);
TestCommon.checkExecReturn(output, 0, true, "Pre JDK 6 class not supported by CDS");
TestCommon.run(
"-cp", jar,
"-verbose:class",
"Hello")
.assertNormalExit("Hello Unicode world (Old)");
// CASE 2: if we exlcude old version of this class, we should not pick up
// the newer version of this class in a subsequent classpath element.
String classpath = jar + File.pathSeparator + jarSrcFile.getPath();
output = TestCommon.dump(classpath, appClasses);
TestCommon.checkExecReturn(output, 0, true, "Pre JDK 6 class not supported by CDS");
TestCommon.run(
"-cp", classpath,
"-verbose:class",
"Hello")
.assertNormalExit("Hello Unicode world (Old)");
}
static void createTestJarFile(File jarSrcFile, File jarFile) throws Exception {
jarFile.delete();
Files.copy(jarSrcFile.toPath(), jarFile.toPath());
File dir = new File(System.getProperty("test.classes", "."));
File outdir = new File(dir, "old_class_test_classes");
outdir.delete();
outdir.mkdir();
writeClassFile(new File(outdir, "Hello.class"), makeOldHello());
JarBuilder.update(jarFile.getPath(), outdir.getPath());
}
static void writeClassFile(File file, byte bytecodes[]) throws Exception {
try (FileOutputStream fos = new FileOutputStream(file)) {
fos.write(bytecodes);
}
}
/* makeOldHello() was obtained using JDK8. We use a method name > 128 that would
trigger a call to java.lang.Character.isJavaIdentifierStart() during class
file parsing.
cat > Hello.java <<EOF
public class Hello {
public static void main(String args[]) {
System.out.println(\u1234());
}
static String \u1234() {
return "Hello Unicode world (Old)";
}
}
EOF
javac Hello.java
java jdk.internal.org.objectweb.asm.util.ASMifier Hello.class
*/
static byte[] makeOldHello() throws Exception {
ClassWriter cw = new ClassWriter(0);
FieldVisitor fv;
MethodVisitor mv;
AnnotationVisitor av0;
cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, "Hello", null, "java/lang/Object", null);
{
mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
mv.visitCode();
mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
mv.visitMethodInsn(INVOKESTATIC, "Hello", "\u1234", "()Ljava/lang/String;", false);
mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
mv.visitInsn(RETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_STATIC, "\u1234", "()Ljava/lang/String;", null, null);
mv.visitCode();
mv.visitLdcInsn("Hello Unicode world (Old)");
mv.visitInsn(ARETURN);
mv.visitMaxs(1, 0);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
}
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