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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotVMConfigVerifier.java @ 21539:d3002f7bd223

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renamed com.oracle.graal.service.processor to com.oracle.jvmci.runtime.processor (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Mon, 25 May 2015 17:34:32 +0200
parents c1e2fdb5fea3
children abfdac702f14
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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 jdk.internal.org.objectweb.asm.*;
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32 import jdk.internal.org.objectweb.asm.Type;
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33 import sun.misc.*;
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34
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35 /**
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36 * A {@link ClassVisitor} that verifies {@link HotSpotVMConfig} does not access {@link Unsafe} from
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37 * any of its non-static, non-constructor methods. This ensures that a deserialized
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38 * {@link HotSpotVMConfig} object does not perform any unsafe reads on addresses that are only valid
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39 * in the context in which the object was serialized. Note that this does not catch cases where a
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40 * client uses an address stored in a {@link HotSpotVMConfig} field.
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41 */
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42 final class HotSpotVMConfigVerifier extends ClassVisitor {
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43
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44 public static boolean check() {
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45 Class<?> cls = HotSpotVMConfig.class;
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46 String classFilePath = "/" + cls.getName().replace('.', '/') + ".class";
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47 try {
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48 InputStream classfile = cls.getResourceAsStream(classFilePath);
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49 ClassReader cr = new ClassReader(Objects.requireNonNull(classfile, "Could not find class file for " + cls.getName()));
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50 ClassVisitor cv = new HotSpotVMConfigVerifier();
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51 cr.accept(cv, 0);
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52 return true;
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53 } catch (IOException e) {
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54 throw new InternalError(e);
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55 }
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56 }
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57
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58 /**
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59 * Source file context for error reporting.
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60 */
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61 String sourceFile = null;
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62
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63 /**
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64 * Line number for error reporting.
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65 */
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66 int lineNo = -1;
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67
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68 private static Class<?> resolve(String name) {
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69 try {
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70 return Class.forName(name.replace('/', '.'));
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71 } catch (ClassNotFoundException e) {
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72 throw new InternalError(e);
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73 }
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74 }
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75
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76 HotSpotVMConfigVerifier() {
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77 super(Opcodes.ASM5);
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78 }
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79
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80 @Override
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81 public void visitSource(String source, String debug) {
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82 this.sourceFile = source;
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83 }
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84
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85 void verify(boolean condition, String message) {
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86 if (!condition) {
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87 error(message);
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88 }
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89 }
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90
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91 void error(String message) {
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92 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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93 sourceFile, lineNo, message, HotSpotVMConfig.class.getSimpleName());
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94 throw new InternalError(errorMessage);
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95
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96 }
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97
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98 @Override
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99 public MethodVisitor visitMethod(int access, String name, String d, String signature, String[] exceptions) {
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100 if (!Modifier.isStatic(access) && Modifier.isPublic(access) && !name.equals("<init>")) {
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101 return new MethodVisitor(Opcodes.ASM5) {
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102
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103 @Override
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104 public void visitLineNumber(int line, Label start) {
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105 lineNo = line;
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106 }
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107
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108 private Executable resolveMethod(String owner, String methodName, String methodDesc) {
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109 Class<?> declaringClass = resolve(owner);
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110 while (declaringClass != null) {
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111 if (methodName.equals("<init>")) {
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112 for (Constructor<?> c : declaringClass.getDeclaredConstructors()) {
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113 if (methodDesc.equals(Type.getConstructorDescriptor(c))) {
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114 return c;
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115 }
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116 }
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117 } else {
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118 Type[] argumentTypes = Type.getArgumentTypes(methodDesc);
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119 for (Method m : declaringClass.getDeclaredMethods()) {
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120 if (m.getName().equals(methodName)) {
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121 if (Arrays.equals(argumentTypes, Type.getArgumentTypes(m))) {
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122 if (Type.getReturnType(methodDesc).equals(Type.getReturnType(m))) {
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123 return m;
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124 }
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125 }
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126 }
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127 }
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128 }
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129 declaringClass = declaringClass.getSuperclass();
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130 }
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131 throw new NoSuchMethodError(owner + "." + methodName + methodDesc);
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132 }
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133
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134 /**
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135 * Checks whether a given method is allowed to be called.
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136 */
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137 private boolean checkInvokeTarget(Executable method) {
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138 if (method.getDeclaringClass().equals(Unsafe.class)) {
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139 return false;
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140 }
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141 return true;
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142 }
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143
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144 @Override
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145 public void visitMethodInsn(int opcode, String owner, String methodName, String methodDesc, boolean itf) {
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146 Executable callee = resolveMethod(owner, methodName, methodDesc);
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147 verify(checkInvokeTarget(callee), "invocation of " + callee);
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148 }
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149 };
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150 } else {
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151 return null;
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152 }
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153 }
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154 }