Mercurial > hg > graal-jvmci-8

annotate test/runtime/RedefineTests/RedefineRunningMethodsWithResolutionErrors.java @ 23185:4b32ab003945

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8131333: [TESTBUG] RedefineRunningMethodsWithResolutionErrors.java Improperly specified VM option 'TraceRedefineClasses=0x600' Reviewed-by: coleenp, sspitsyn
author aeriksso
date Wed, 15 Jul 2015 15:32:33 +0200
parents b3217f8fd2a1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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4b32ab003945 8131333: [TESTBUG] RedefineRunningMethodsWithResolutionErrors.java Improperly specified VM option 'TraceRedefineClasses=0x600'
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33 * @run main/othervm -javaagent:redefineagent.jar 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 }