/*
* Copyright (c) 2015, 2016, 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
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* questions.
*/
/*
* @test
* @bug 8087342
* @summary Test linkresolver search static, instance and overpass duplicates
* @modules java.base/jdk.internal.org.objectweb.asm
* @run main/othervm -Xverify:none TestStaticandInstance
*/
import java.util.*;
import jdk.internal.org.objectweb.asm.*;
import static jdk.internal.org.objectweb.asm.Opcodes.*;
public class TestStaticandInstance {
static final String stringC = "C";
static final String stringD = "D";
static final String stringI = "I";
public static void main(String args[]) throws Throwable {
ClassLoader cl = new ClassLoader() {
public Class<?> loadClass(String name) throws ClassNotFoundException {
Class retClass;
if ((retClass = findLoadedClass(name)) != null) {
return retClass;
}
if (stringC.equals(name)) {
byte[] classFile=dumpC();
return defineClass(stringC, classFile, 0, classFile.length);
}
if (stringD.equals(name)) {
byte[] classFile=dumpD();
return defineClass(stringD, classFile, 0, classFile.length);
}
if (stringI.equals(name)) {
byte[] classFile=dumpI();
return defineClass(stringI, classFile, 0, classFile.length);
}
return super.loadClass(name);
}
};
Class classC = cl.loadClass(stringC);
Class classI = cl.loadClass(stringI);
try {
int staticret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallStatic").invoke(null);
if (staticret != 1) {
throw new RuntimeException("invokestatic failed to call correct method");
}
System.out.println("staticret: " + staticret); // should be 1
int invokeinterfaceret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallInterface").invoke(null);
if (invokeinterfaceret != 0) {
throw new RuntimeException(String.format("Expected java.lang.AbstractMethodError, got %d", invokeinterfaceret));
}
System.out.println("invokeinterfaceret: AbstractMethodError");
int invokevirtualret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallVirtual").invoke(null);
if (invokevirtualret != 0) {
throw new RuntimeException(String.format("Expected java.lang.IncompatibleClassChangeError, got %d", invokevirtualret));
}
System.out.println("invokevirtualret: IncompatibleClassChangeError");
} catch (java.lang.Throwable e) {
throw new RuntimeException("Unexpected exception: " + e.getMessage());
}
}
/*
interface I {
public int m(); // abstract
default int q() { return 3; } // trigger defmeth processing: C gets AME overpass
}
// C gets static, private and AME overpass m()I with -Xverify:none
class C implements I {
static int m() { return 1;} // javac with "n()" and patch to "m()"
private int m() { return 2;} // javac with public and patch to private
}
public class D {
public static int CallStatic() {
int staticret = C.m(); // javac with "C.n" and patch to "C.m"
return staticret;
}
public static int CallInterface() throws AbstractMethodError{
try {
I myI = new C();
return myI.m();
} catch (java.lang.AbstractMethodError e) {
return 0; // for success
}
}
public static int CallVirtual() {
try {
C myC = new C();
return myC.m();
} catch (java.lang.IncompatibleClassChangeError e) {
return 0; // for success
}
}
}
*/
public static byte[] dumpC() {
ClassWriter cw = new ClassWriter(0);
FieldVisitor fv;
MethodVisitor mv;
AnnotationVisitor av0;
cw.visit(52, ACC_SUPER, "C", null, "java/lang/Object", new String[] { "I" });
{
mv = cw.visitMethod(0, "<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_STATIC, "m", "()I", null, null);
mv.visitCode();
mv.visitInsn(ICONST_1);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 0);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PRIVATE, "m", "()I", null, null);
mv.visitCode();
mv.visitInsn(ICONST_2);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
public static byte[] dumpD () {
ClassWriter cw = new ClassWriter(0);
FieldVisitor fv;
MethodVisitor mv;
AnnotationVisitor av0;
cw.visit(52, ACC_PUBLIC + ACC_SUPER, "D", 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, "CallStatic", "()I", null, null);
mv.visitCode();
mv.visitMethodInsn(INVOKESTATIC, "C", "m", "()I", false);
mv.visitVarInsn(ISTORE, 0);
mv.visitVarInsn(ILOAD, 0);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallInterface", "()I", null, new String[] { "java/lang/AbstractMethodError" });
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/AbstractMethodError");
mv.visitLabel(l0);
mv.visitTypeInsn(NEW, "C");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "C", "<init>", "()V", false);
mv.visitVarInsn(ASTORE, 0);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEINTERFACE, "I", "m", "()I", true);
mv.visitLabel(l1);
mv.visitInsn(IRETURN);
mv.visitLabel(l2);
mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/AbstractMethodError"});
mv.visitVarInsn(ASTORE, 0);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallVirtual", "()I", null, null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/IncompatibleClassChangeError");
mv.visitLabel(l0);
mv.visitTypeInsn(NEW, "C");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "C", "<init>", "()V", false);
mv.visitVarInsn(ASTORE, 0);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKEVIRTUAL, "C", "m", "()I", false);
mv.visitLabel(l1);
mv.visitInsn(IRETURN);
mv.visitLabel(l2);
mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/IncompatibleClassChangeError"});
mv.visitVarInsn(ASTORE, 0);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitMaxs(2, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
public static byte[] dumpI() {
ClassWriter cw = new ClassWriter(0);
FieldVisitor fv;
MethodVisitor mv;
AnnotationVisitor av0;
cw.visit(52, ACC_ABSTRACT + ACC_INTERFACE, "I", null, "java/lang/Object", null);
{
mv = cw.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, "m", "()I", null, null);
mv.visitEnd();
}
{
mv = cw.visitMethod(ACC_PUBLIC, "q", "()I", null, null);
mv.visitCode();
mv.visitInsn(ICONST_3);
mv.visitInsn(IRETURN);
mv.visitMaxs(1, 1);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
}