1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 /*
  26  * @test
  27  * @bug 8087342
  28  * @summary Test linkresolver search static, instance and overpass duplicates
  29  * @modules java.base/jdk.internal.org.objectweb.asm
  30  * @run main/othervm -Xverify:none TestStaticandInstance
  31  */
  32 
  33 
  34 import java.util.*;
  35 import jdk.internal.org.objectweb.asm.*;
  36 import static jdk.internal.org.objectweb.asm.Opcodes.*;
  37 
  38 public class TestStaticandInstance {
  39   static final String stringC = "C";
  40   static final String stringD = "D";
  41   static final String stringI = "I";
  42 
  43   public static void main(String args[]) throws Throwable {
  44     ClassLoader cl = new ClassLoader() {
  45       public Class<?> loadClass(String name) throws ClassNotFoundException {
  46         Class retClass;
  47         if ((retClass = findLoadedClass(name)) != null) {
  48            return retClass;
  49         }
  50         if (stringC.equals(name)) {
  51             byte[] classFile=dumpC();
  52             return defineClass(stringC, classFile, 0, classFile.length);
  53         }
  54         if (stringD.equals(name)) {
  55             byte[] classFile=dumpD();
  56             return defineClass(stringD, classFile, 0, classFile.length);
  57         }
  58         if (stringI.equals(name)) {
  59             byte[] classFile=dumpI();
  60             return defineClass(stringI, classFile, 0, classFile.length);
  61         }
  62         return super.loadClass(name);
  63       }
  64     };
  65 
  66     Class classC = cl.loadClass(stringC);
  67     Class classI = cl.loadClass(stringI);
  68 
  69     try {
  70       int staticret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallStatic").invoke(null);
  71       if (staticret != 1) {
  72         throw new RuntimeException("invokestatic failed to call correct method");
  73       }
  74       System.out.println("staticret: " + staticret); // should be 1
  75 
  76       int invokeinterfaceret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallInterface").invoke(null);
  77       if (invokeinterfaceret != 0) {
  78         throw new RuntimeException(String.format("Expected java.lang.AbstractMethodError, got %d", invokeinterfaceret));
  79       }
  80       System.out.println("invokeinterfaceret: AbstractMethodError");
  81 
  82       int invokevirtualret = (Integer)cl.loadClass(stringD).getDeclaredMethod("CallVirtual").invoke(null);
  83       if (invokevirtualret != 0) {
  84         throw new RuntimeException(String.format("Expected java.lang.IncompatibleClassChangeError, got %d", invokevirtualret));
  85       }
  86       System.out.println("invokevirtualret: IncompatibleClassChangeError");
  87     } catch (java.lang.Throwable e) {
  88       throw new RuntimeException("Unexpected exception: " + e.getMessage());
  89     }
  90   }
  91 
  92 /*
  93 interface I {
  94   public int m(); // abstract
  95   default int q() { return 3; } // trigger defmeth processing: C gets AME overpass
  96 }
  97 
  98 // C gets static, private and AME overpass m()I with -Xverify:none
  99 class C implements I {
 100   static int m() { return 1;}  // javac with "n()" and patch to "m()"
 101   private int m() { return 2;} // javac with public and patch to private
 102 }
 103 
 104 public class D {
 105   public static int CallStatic() {
 106     int staticret = C.m();    // javac with "C.n" and patch to "C.m"
 107     return staticret;
 108   }
 109   public static int CallInterface() throws AbstractMethodError{
 110     try {
 111       I myI = new C();
 112       return myI.m();
 113     } catch (java.lang.AbstractMethodError e) {
 114       return 0; // for success
 115     }
 116   }
 117   public static int CallVirtual() {
 118     try {
 119       C myC = new C();
 120       return myC.m();
 121     } catch (java.lang.IncompatibleClassChangeError e) {
 122       return 0; // for success
 123     }
 124   }
 125 }
 126 */
 127 
 128   public static byte[] dumpC() {
 129 
 130     ClassWriter cw = new ClassWriter(0);
 131     FieldVisitor fv;
 132     MethodVisitor mv;
 133     AnnotationVisitor av0;
 134 
 135     cw.visit(52, ACC_SUPER, "C", null, "java/lang/Object", new String[] { "I" });
 136 
 137     {
 138       mv = cw.visitMethod(0, "<init>", "()V", null, null);
 139       mv.visitCode();
 140       mv.visitVarInsn(ALOAD, 0);
 141       mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
 142       mv.visitInsn(RETURN);
 143       mv.visitMaxs(1, 1);
 144       mv.visitEnd();
 145     }
 146     {
 147       mv = cw.visitMethod(ACC_STATIC, "m", "()I", null, null);
 148       mv.visitCode();
 149       mv.visitInsn(ICONST_1);
 150       mv.visitInsn(IRETURN);
 151       mv.visitMaxs(1, 0);
 152       mv.visitEnd();
 153     }
 154     {
 155       mv = cw.visitMethod(ACC_PRIVATE, "m", "()I", null, null);
 156       mv.visitCode();
 157       mv.visitInsn(ICONST_2);
 158       mv.visitInsn(IRETURN);
 159       mv.visitMaxs(1, 1);
 160       mv.visitEnd();
 161     }
 162     cw.visitEnd();
 163 
 164     return cw.toByteArray();
 165   }
 166 
 167   public static byte[] dumpD () {
 168 
 169     ClassWriter cw = new ClassWriter(0);
 170     FieldVisitor fv;
 171     MethodVisitor mv;
 172     AnnotationVisitor av0;
 173 
 174     cw.visit(52, ACC_PUBLIC + ACC_SUPER, "D", null, "java/lang/Object", null);
 175 
 176     {
 177       mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
 178       mv.visitCode();
 179       mv.visitVarInsn(ALOAD, 0);
 180       mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
 181       mv.visitInsn(RETURN);
 182       mv.visitMaxs(1, 1);
 183       mv.visitEnd();
 184     }
 185     {
 186       mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallStatic", "()I", null, null);
 187       mv.visitCode();
 188       mv.visitMethodInsn(INVOKESTATIC, "C", "m", "()I", false);
 189       mv.visitVarInsn(ISTORE, 0);
 190       mv.visitVarInsn(ILOAD, 0);
 191       mv.visitInsn(IRETURN);
 192       mv.visitMaxs(1, 1);
 193       mv.visitEnd();
 194     }
 195     {
 196       mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallInterface", "()I", null, new String[] { "java/lang/AbstractMethodError" });
 197       mv.visitCode();
 198       Label l0 = new Label();
 199       Label l1 = new Label();
 200       Label l2 = new Label();
 201       mv.visitTryCatchBlock(l0, l1, l2, "java/lang/AbstractMethodError");
 202       mv.visitLabel(l0);
 203       mv.visitTypeInsn(NEW, "C");
 204       mv.visitInsn(DUP);
 205       mv.visitMethodInsn(INVOKESPECIAL, "C", "<init>", "()V", false);
 206       mv.visitVarInsn(ASTORE, 0);
 207       mv.visitVarInsn(ALOAD, 0);
 208       mv.visitMethodInsn(INVOKEINTERFACE, "I", "m", "()I", true);
 209       mv.visitLabel(l1);
 210       mv.visitInsn(IRETURN);
 211       mv.visitLabel(l2);
 212       mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/AbstractMethodError"});
 213       mv.visitVarInsn(ASTORE, 0);
 214       mv.visitInsn(ICONST_0);
 215       mv.visitInsn(IRETURN);
 216       mv.visitMaxs(2, 1);
 217       mv.visitEnd();
 218     }
 219     {
 220       mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "CallVirtual", "()I", null, null);
 221       mv.visitCode();
 222       Label l0 = new Label();
 223       Label l1 = new Label();
 224       Label l2 = new Label();
 225       mv.visitTryCatchBlock(l0, l1, l2, "java/lang/IncompatibleClassChangeError");
 226       mv.visitLabel(l0);
 227       mv.visitTypeInsn(NEW, "C");
 228       mv.visitInsn(DUP);
 229       mv.visitMethodInsn(INVOKESPECIAL, "C", "<init>", "()V", false);
 230       mv.visitVarInsn(ASTORE, 0);
 231       mv.visitVarInsn(ALOAD, 0);
 232       mv.visitMethodInsn(INVOKEVIRTUAL, "C", "m", "()I", false);
 233       mv.visitLabel(l1);
 234       mv.visitInsn(IRETURN);
 235       mv.visitLabel(l2);
 236       mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/IncompatibleClassChangeError"});
 237       mv.visitVarInsn(ASTORE, 0);
 238       mv.visitInsn(ICONST_0);
 239       mv.visitInsn(IRETURN);
 240       mv.visitMaxs(2, 1);
 241       mv.visitEnd();
 242     }
 243     cw.visitEnd();
 244 
 245     return cw.toByteArray();
 246   }
 247 
 248   public static byte[] dumpI() {
 249 
 250     ClassWriter cw = new ClassWriter(0);
 251     FieldVisitor fv;
 252     MethodVisitor mv;
 253     AnnotationVisitor av0;
 254 
 255     cw.visit(52, ACC_ABSTRACT + ACC_INTERFACE, "I", null, "java/lang/Object", null);
 256 
 257     {
 258       mv = cw.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, "m", "()I", null, null);
 259       mv.visitEnd();
 260     }
 261     {
 262       mv = cw.visitMethod(ACC_PUBLIC, "q", "()I", null, null);
 263       mv.visitCode();
 264       mv.visitInsn(ICONST_3);
 265       mv.visitInsn(IRETURN);
 266       mv.visitMaxs(1, 1);
 267       mv.visitEnd();
 268     }
 269     cw.visitEnd();
 270 
 271     return cw.toByteArray();
 272   }
 273 }