201 lines
7.1 KiB
Java
201 lines
7.1 KiB
Java
/*
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* Copyright (c) 2016, 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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/*
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* @test 8163808
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* @modules java.base/jdk.internal.org.objectweb.asm
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* @run main TransitiveOverrideCFV50
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*/
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import java.util.*;
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import java.io.File;
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import java.io.FileOutputStream;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import jdk.internal.org.objectweb.asm.AnnotationVisitor;
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import jdk.internal.org.objectweb.asm.Opcodes;
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/*
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* Test mixed classfile version overriding handling.
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* Key is to generate P2/C with an older classfile version <=50
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* Correct response is B.m:2 for older classfiles
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* This test was added to ensure no assertions in debug
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* note: for P2/C classfile version >=51, correct answer becomes C.m:3
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* public class P1.A { public int m() { return 1; }
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*
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* public class P1.B extends A { int m() { return 2; }
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*
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* public class P2.c extends P1.B { public int m() { return 3; }
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*/
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public class TransitiveOverrideCFV50 implements Opcodes{
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static final String classP1A = "P1.A";
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static final String classP1B = "P1.B";
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static final String classP2C = "P2.C";
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static final String callerName = classP2C;
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public static void main(String[] args) throws Exception {
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ClassLoader cl = new ClassLoader() {
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public Class<?> loadClass(String name) throws ClassNotFoundException {
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if (findLoadedClass(name) != null) {
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return findLoadedClass(name);
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}
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if (classP1A.equals(name)) {
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byte[] classFile = dumpP1A();
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return defineClass(classP1A, classFile, 0, classFile.length);
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}
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if (classP1B.equals(name)) {
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byte[] classFile = dumpP1B();
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return defineClass(classP1B, classFile, 0, classFile.length);
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}
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if (classP2C.equals(name)) {
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byte[] classFile = dumpP2C();
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return defineClass(classP2C, classFile, 0, classFile.length);
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}
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return super.loadClass(name);
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}
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};
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cl.loadClass(classP1A);
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cl.loadClass(classP1B);
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cl.loadClass(classP2C);
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//cl.loadClass(callerName).getDeclaredMethod("test");
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cl.loadClass(callerName).newInstance();
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int result = (Integer)cl.loadClass(callerName).getDeclaredMethod("test").invoke(null);
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if (result != 2) {
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throw new RuntimeException("expected B.m:2, got " + result);
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}
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}
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public static byte[] dumpP1A() {
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ClassWriter cw = new ClassWriter(0);
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MethodVisitor mv;
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cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, "P1/A", null, "java/lang/Object", null);
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{
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mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
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mv.visitCode();
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mv.visitVarInsn(ALOAD, 0);
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mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
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mv.visitInsn(RETURN);
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mv.visitMaxs(1, 1);
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mv.visitEnd();
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}
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{
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mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
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mv.visitCode();
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mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
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mv.visitLdcInsn("A.m");
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mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
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mv.visitIntInsn(BIPUSH, 1);
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mv.visitInsn(IRETURN);
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mv.visitMaxs(2, 1);
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mv.visitEnd();
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}
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cw.visitEnd();
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return cw.toByteArray();
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}
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public static byte[] dumpP1B() {
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ClassWriter cw = new ClassWriter(0);
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MethodVisitor mv;
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cw.visit(V1_8, ACC_PUBLIC + ACC_SUPER, "P1/B", null, "P1/A", null);
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{
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mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
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mv.visitCode();
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mv.visitVarInsn(ALOAD, 0);
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mv.visitMethodInsn(INVOKESPECIAL, "P1/A", "<init>", "()V", false);
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mv.visitInsn(RETURN);
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mv.visitMaxs(1, 1);
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mv.visitEnd();
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}
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{
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mv = cw.visitMethod(0, "m", "()I", null, null);
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mv.visitCode();
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mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
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mv.visitLdcInsn("B.m");
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mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
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mv.visitIntInsn(BIPUSH, 2);
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mv.visitInsn(IRETURN);
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mv.visitMaxs(2, 1);
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mv.visitEnd();
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}
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cw.visitEnd();
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return cw.toByteArray();
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}
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public static byte[] dumpP2C() {
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ClassWriter cw = new ClassWriter(0);
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MethodVisitor mv;
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cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, "P2/C", null, "P1/B", null);
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{
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mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
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mv.visitCode();
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mv.visitVarInsn(ALOAD, 0);
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mv.visitMethodInsn(INVOKESPECIAL, "P1/B", "<init>", "()V", false);
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mv.visitInsn(RETURN);
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mv.visitMaxs(1, 1);
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mv.visitEnd();
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}
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{
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mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null);
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mv.visitCode();
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mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
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mv.visitLdcInsn("P2/C.m");
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mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false);
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mv.visitIntInsn(BIPUSH, 3);
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mv.visitInsn(IRETURN);
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mv.visitMaxs(2, 1);
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mv.visitEnd();
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}
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{
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mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "()I", null, null);
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mv.visitCode();
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mv.visitTypeInsn(NEW, "P2/C");
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mv.visitInsn(DUP);
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mv.visitMethodInsn(INVOKESPECIAL, "P2/C", "<init>", "()V", false);
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mv.visitMethodInsn(INVOKEVIRTUAL, "P1/A", "m", "()I", false);
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mv.visitInsn(IRETURN);
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mv.visitMaxs(3, 2);
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mv.visitEnd();
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}
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cw.visitEnd();
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return cw.toByteArray();
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}
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}
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