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1 /* |
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 /* |
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26 * @test |
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27 * @bug 8032010 |
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28 * @summary method lookup on an abstract method in a concrete class should be successful |
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29 * @run main TestConcreteClassWithAbstractMethod |
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30 */ |
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31 |
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32 import jdk.internal.org.objectweb.asm.ClassWriter; |
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33 import jdk.internal.org.objectweb.asm.MethodVisitor; |
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34 |
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35 import static jdk.internal.org.objectweb.asm.Opcodes.*; |
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36 |
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37 /* |
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38 * class T1 { public int m() {} } |
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39 * class T2 { public abstract int m(); } |
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40 * class T3 { public int m() {} } |
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41 * |
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42 * Call site: T3.test() { invokevirtual T2.m() } |
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43 * T3.m() should be invoked |
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44 */ |
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45 public class TestConcreteClassWithAbstractMethod { |
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46 static final String classT1 = "p1.T1"; |
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47 static final String classT2 = "p1.T2"; |
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48 static final String classT3 = "p1.T3"; |
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49 |
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50 static final String callerName = classT3; |
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51 |
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52 public static void main(String[] args) throws Exception { |
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53 ClassLoader cl = new ClassLoader() { |
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54 public Class<?> loadClass(String name) throws ClassNotFoundException { |
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55 if (findLoadedClass(name) != null) { |
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56 return findLoadedClass(name); |
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57 } |
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58 |
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59 if (classT1.equals(name)) { |
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60 byte[] classFile = dumpT1(); |
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61 return defineClass(classT1, classFile, 0, classFile.length); |
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62 } |
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63 if (classT2.equals(name)) { |
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64 byte[] classFile = dumpT2(); |
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65 return defineClass(classT2, classFile, 0, classFile.length); |
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66 } |
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67 if (classT3.equals(name)) { |
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68 byte[] classFile = dumpT3(); |
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69 return defineClass(classT3, classFile, 0, classFile.length); |
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70 } |
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71 |
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72 return super.loadClass(name); |
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73 } |
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74 }; |
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75 |
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76 cl.loadClass(classT1); |
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77 cl.loadClass(classT2); |
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78 cl.loadClass(classT3); |
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79 |
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80 //cl.loadClass(callerName).getDeclaredMethod("m"); |
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81 cl.loadClass(callerName).newInstance(); |
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82 |
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83 int result = (Integer)cl.loadClass(callerName).getDeclaredMethod("test").invoke(null); |
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84 System.out.println(""+result); |
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85 } |
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86 |
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87 public static byte[] dumpT1() { |
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88 ClassWriter cw = new ClassWriter(0); |
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89 MethodVisitor mv; |
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90 |
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91 cw.visit(52, ACC_PUBLIC | ACC_SUPER, "p1/T1", null, "java/lang/Object", null); |
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92 { |
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93 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
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94 mv.visitCode(); |
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95 mv.visitVarInsn(ALOAD, 0); |
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96 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); |
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97 mv.visitInsn(RETURN); |
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98 mv.visitMaxs(1, 1); |
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99 mv.visitEnd(); |
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100 } |
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101 { |
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102 mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null); |
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103 mv.visitCode(); |
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104 mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); |
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105 mv.visitLdcInsn("p1/T1.m()"); |
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106 mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); |
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107 mv.visitIntInsn(BIPUSH, 3); |
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108 mv.visitInsn(IRETURN); |
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109 mv.visitMaxs(2, 1); |
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110 mv.visitEnd(); |
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111 } |
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112 cw.visitEnd(); |
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113 |
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114 return cw.toByteArray(); |
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115 } |
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116 |
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117 public static byte[] dumpT2() { |
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118 ClassWriter cw = new ClassWriter(0); |
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119 MethodVisitor mv; |
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120 |
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121 cw.visit(52, ACC_PUBLIC | ACC_SUPER, "p1/T2", null, "p1/T1", null); |
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122 { |
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123 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
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124 mv.visitCode(); |
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125 mv.visitVarInsn(ALOAD, 0); |
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126 mv.visitMethodInsn(INVOKESPECIAL, "p1/T1", "<init>", "()V", false); |
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127 mv.visitInsn(RETURN); |
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128 mv.visitMaxs(1, 1); |
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129 mv.visitEnd(); |
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130 } |
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131 { |
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132 mv = cw.visitMethod(ACC_PUBLIC + ACC_ABSTRACT, "m", "()I", null, null); |
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133 mv.visitEnd(); |
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134 } |
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135 cw.visitEnd(); |
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136 |
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137 return cw.toByteArray(); |
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138 } |
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139 |
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140 public static byte[] dumpT3() { |
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141 ClassWriter cw = new ClassWriter(0); |
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142 MethodVisitor mv; |
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143 |
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144 cw.visit(52, ACC_PUBLIC + ACC_SUPER, "p1/T3", null, "p1/T2", null); |
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145 |
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146 { |
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147 mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); |
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148 mv.visitCode(); |
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149 mv.visitVarInsn(ALOAD, 0); |
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150 mv.visitMethodInsn(INVOKESPECIAL, "p1/T2", "<init>", "()V", false); |
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151 mv.visitInsn(RETURN); |
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152 mv.visitMaxs(1, 1); |
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153 mv.visitEnd(); |
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154 } |
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155 { |
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156 mv = cw.visitMethod(ACC_PUBLIC, "m", "()I", null, null); |
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157 mv.visitCode(); |
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158 mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); |
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159 mv.visitLdcInsn("p1/T3.m()"); |
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160 mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V", false); |
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161 mv.visitIntInsn(BIPUSH, 2); |
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162 mv.visitInsn(IRETURN); |
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163 mv.visitMaxs(2, 1); |
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164 mv.visitEnd(); |
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165 } |
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166 { |
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167 mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "test", "()I", null, null); |
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168 mv.visitCode(); |
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169 mv.visitTypeInsn(NEW, "p1/T3"); |
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170 mv.visitInsn(DUP); |
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171 mv.visitMethodInsn(INVOKESPECIAL, "p1/T3", "<init>", "()V", false); |
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172 mv.visitMethodInsn(INVOKEVIRTUAL, "p1/T2", "m", "()I", false); |
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173 mv.visitInsn(IRETURN); |
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174 mv.visitMaxs(3, 2); |
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175 mv.visitEnd(); |
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176 } |
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177 cw.visitEnd(); |
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178 |
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179 return cw.toByteArray(); |
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180 } |
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181 } |