Mercurial > hg > graal-jvmci-8
annotate test/runtime/RedefineTests/RedefineRunningMethodsWithResolutionErrors.java @ 23175:b3217f8fd2a1
8076110: VM crash when class is redefined with Instrumentation.redefineClasses
Reviewed-by: coleenp, sspitsyn
author | aeriksso |
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date | Tue, 16 Jun 2015 15:59:57 +0200 |
parents | |
children | 4b32ab003945 |
rev | line source |
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23175
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1 /* |
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2 * Copyright (c) 2014, 2015, 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 * @test |
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26 * @bug 8076110 |
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27 * @summary Redefine running methods that have cached resolution errors |
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28 * @library /testlibrary |
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29 * @modules java.instrument |
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30 * java.base/jdk.internal.org.objectweb.asm |
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31 * @build RedefineClassHelper |
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32 * @run main RedefineClassHelper |
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33 * @run main/othervm -javaagent:redefineagent.jar -XX:TraceRedefineClasses=0x600 RedefineRunningMethodsWithResolutionErrors |
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34 */ |
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35 |
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36 import jdk.internal.org.objectweb.asm.ClassWriter; |
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37 import jdk.internal.org.objectweb.asm.Label; |
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38 import jdk.internal.org.objectweb.asm.MethodVisitor; |
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39 import jdk.internal.org.objectweb.asm.Opcodes; |
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40 |
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41 import java.lang.reflect.InvocationTargetException; |
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42 |
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43 public class RedefineRunningMethodsWithResolutionErrors extends ClassLoader implements Opcodes { |
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44 |
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45 @Override |
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46 protected Class<?> findClass(String name) throws ClassNotFoundException { |
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47 if (name.equals("C")) { |
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48 byte[] b = loadC(false); |
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49 return defineClass(name, b, 0, b.length); |
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50 } else { |
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51 return super.findClass(name); |
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52 } |
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53 } |
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54 |
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55 private static byte[] loadC(boolean redefine) { |
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56 ClassWriter cw = new ClassWriter(0); |
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57 |
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58 cw.visit(52, ACC_SUPER | ACC_PUBLIC, "C", null, "java/lang/Object", null); |
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59 { |
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60 MethodVisitor mv; |
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61 |
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62 mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "m", "()V", null, null); |
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63 mv.visitCode(); |
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64 |
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65 // First time we run we will: |
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66 // 1) Cache resolution errors |
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67 // 2) Redefine the class / method |
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68 // 3) Try to read the resolution errors that were cached |
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69 // |
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70 // The redefined method will never run, throw error to be sure |
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71 if (redefine) { |
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72 createThrowRuntimeExceptionCode(mv, "The redefined method was called"); |
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73 } else { |
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74 createMethodBody(mv); |
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75 } |
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76 mv.visitMaxs(3, 0); |
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77 mv.visitEnd(); |
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78 } |
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79 cw.visitEnd(); |
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80 return cw.toByteArray(); |
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81 } |
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82 |
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83 private static void createMethodBody(MethodVisitor mv) { |
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84 Label classExists = new Label(); |
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85 |
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86 // Cache resolution errors |
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87 createLoadNonExistentClassCode(mv, classExists); |
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88 |
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89 // Redefine our own class and method |
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90 mv.visitMethodInsn(INVOKESTATIC, "RedefineRunningMethodsWithResolutionErrors", "redefine", "()V"); |
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91 |
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92 // Provoke the same error again to make sure the resolution error cache works |
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93 createLoadNonExistentClassCode(mv, classExists); |
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94 |
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95 // Test passed |
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96 mv.visitInsn(RETURN); |
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97 |
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98 mv.visitFrame(F_SAME, 0, new Object[0], 0, new Object[0]); |
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99 mv.visitLabel(classExists); |
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100 |
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101 createThrowRuntimeExceptionCode(mv, "Loaded class that shouldn't exist (\"NonExistentClass\")"); |
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102 } |
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103 |
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104 private static void createLoadNonExistentClassCode(MethodVisitor mv, Label classExists) { |
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105 Label tryLoadBegin = new Label(); |
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106 Label tryLoadEnd = new Label(); |
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107 Label catchLoadBlock = new Label(); |
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108 mv.visitTryCatchBlock(tryLoadBegin, tryLoadEnd, catchLoadBlock, "java/lang/NoClassDefFoundError"); |
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109 |
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110 // Try to load a class that does not exist to provoke resolution errors |
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111 mv.visitLabel(tryLoadBegin); |
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112 mv.visitMethodInsn(INVOKESTATIC, "NonExistentClass", "nonExistentMethod", "()V"); |
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113 mv.visitLabel(tryLoadEnd); |
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114 |
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115 // No NoClassDefFoundError means NonExistentClass existed, which shouldn't happen |
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116 mv.visitJumpInsn(GOTO, classExists); |
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117 |
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118 mv.visitFrame(F_SAME1, 0, new Object[0], 1, new Object[] { "java/lang/NoClassDefFoundError" }); |
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119 mv.visitLabel(catchLoadBlock); |
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120 |
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121 // Ignore the expected NoClassDefFoundError |
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122 mv.visitInsn(POP); |
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123 } |
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124 |
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125 private static void createThrowRuntimeExceptionCode(MethodVisitor mv, String msg) { |
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126 mv.visitTypeInsn(NEW, "java/lang/RuntimeException"); |
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127 mv.visitInsn(DUP); |
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128 mv.visitLdcInsn(msg); |
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129 mv.visitMethodInsn(INVOKESPECIAL, "java/lang/RuntimeException", "<init>", "(Ljava/lang/String;)V"); |
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130 mv.visitInsn(ATHROW); |
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131 } |
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132 |
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133 private static Class<?> c; |
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134 |
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135 public static void redefine() throws Exception { |
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136 RedefineClassHelper.redefineClass(c, loadC(true)); |
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137 } |
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138 |
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139 public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException { |
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140 c = Class.forName("C", true, new RedefineRunningMethodsWithResolutionErrors()); |
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141 c.getMethod("m").invoke(null); |
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142 } |
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143 } |