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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotVMConfigVerifier.java @ 21528:513f8d0ae27d

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merge fixes
author Doug Simon <doug.simon@oracle.com>
date Fri, 22 May 2015 23:58:35 +0200
parents 1da7aef31a08
children
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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 package com.oracle.graal.hotspot.jvmci;
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24
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25 import static java.lang.String.*;
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26
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27 import java.io.*;
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28 import java.lang.reflect.*;
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29 import java.util.*;
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30
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31 import com.oracle.graal.compiler.common.*;
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32
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33 import jdk.internal.org.objectweb.asm.*;
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34 import jdk.internal.org.objectweb.asm.Type;
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35 import sun.misc.*;
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36
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37 /**
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38 * A {@link ClassVisitor} that verifies {@link HotSpotVMConfig} does not access {@link Unsafe} from
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39 * any of its non-static, non-constructor methods. This ensures that a deserialized
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40 * {@link HotSpotVMConfig} object does not perform any unsafe reads on addresses that are only valid
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41 * in the context in which the object was serialized. Note that this does not catch cases where a
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42 * client uses an address stored in a {@link HotSpotVMConfig} field.
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43 */
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44 final class HotSpotVMConfigVerifier extends ClassVisitor {
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45
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46 public static boolean check() {
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47 Class<?> cls = HotSpotVMConfig.class;
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48 String classFilePath = "/" + cls.getName().replace('.', '/') + ".class";
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49 try {
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50 InputStream classfile = cls.getResourceAsStream(classFilePath);
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51 ClassReader cr = new ClassReader(Objects.requireNonNull(classfile, "Could not find class file for " + cls.getName()));
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52 ClassVisitor cv = new HotSpotVMConfigVerifier();
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53 cr.accept(cv, 0);
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54 return true;
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55 } catch (IOException e) {
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56 throw new GraalInternalError(e);
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57 }
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58 }
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59
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60 /**
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61 * Source file context for error reporting.
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62 */
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63 String sourceFile = null;
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64
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65 /**
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66 * Line number for error reporting.
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67 */
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68 int lineNo = -1;
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69
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70 private static Class<?> resolve(String name) {
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71 try {
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72 return Class.forName(name.replace('/', '.'));
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73 } catch (ClassNotFoundException e) {
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74 throw new InternalError(e);
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75 }
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76 }
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77
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78 HotSpotVMConfigVerifier() {
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79 super(Opcodes.ASM5);
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80 }
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81
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82 @Override
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83 public void visitSource(String source, String debug) {
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84 this.sourceFile = source;
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85 }
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86
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87 void verify(boolean condition, String message) {
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88 if (!condition) {
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89 error(message);
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90 }
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91 }
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92
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93 void error(String message) {
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94 String errorMessage = format("%s:%d: %s is not allowed in the context of compilation replay. The unsafe access should be moved into the %s constructor and the result cached in a field",
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95 sourceFile, lineNo, message, HotSpotVMConfig.class.getSimpleName());
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96 throw new InternalError(errorMessage);
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97
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98 }
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99
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100 @Override
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101 public MethodVisitor visitMethod(int access, String name, String d, String signature, String[] exceptions) {
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102 if (!Modifier.isStatic(access) && Modifier.isPublic(access) && !name.equals("<init>")) {
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103 return new MethodVisitor(Opcodes.ASM5) {
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104
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105 @Override
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106 public void visitLineNumber(int line, Label start) {
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107 lineNo = line;
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108 }
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109
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110 private Executable resolveMethod(String owner, String methodName, String methodDesc) {
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111 Class<?> declaringClass = resolve(owner);
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112 while (declaringClass != null) {
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113 if (methodName.equals("<init>")) {
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114 for (Constructor<?> c : declaringClass.getDeclaredConstructors()) {
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115 if (methodDesc.equals(Type.getConstructorDescriptor(c))) {
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116 return c;
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117 }
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118 }
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119 } else {
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120 Type[] argumentTypes = Type.getArgumentTypes(methodDesc);
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121 for (Method m : declaringClass.getDeclaredMethods()) {
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122 if (m.getName().equals(methodName)) {
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123 if (Arrays.equals(argumentTypes, Type.getArgumentTypes(m))) {
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124 if (Type.getReturnType(methodDesc).equals(Type.getReturnType(m))) {
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125 return m;
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126 }
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127 }
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128 }
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129 }
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130 }
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131 declaringClass = declaringClass.getSuperclass();
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132 }
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133 throw new NoSuchMethodError(owner + "." + methodName + methodDesc);
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134 }
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135
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136 /**
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137 * Checks whether a given method is allowed to be called.
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138 */
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139 private boolean checkInvokeTarget(Executable method) {
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140 if (method.getDeclaringClass().equals(Unsafe.class)) {
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141 return false;
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142 }
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143 return true;
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144 }
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145
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146 @Override
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147 public void visitMethodInsn(int opcode, String owner, String methodName, String methodDesc, boolean itf) {
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148 Executable callee = resolveMethod(owner, methodName, methodDesc);
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149 verify(checkInvokeTarget(callee), "invocation of " + callee);
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150 }
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151 };
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152 } else {
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153 return null;
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154 }
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155 }
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156 }