Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotVMConfigVerifier.java @ 23677:eb166b568645
Merge
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 09 Jun 2016 18:58:09 -0700 |
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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 jdk.vm.ci.hotspot; |
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24 |
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25 import static java.lang.String.format; |
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26 |
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27 import java.io.IOException; |
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28 import java.io.InputStream; |
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29 import java.lang.reflect.Constructor; |
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30 import java.lang.reflect.Executable; |
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31 import java.lang.reflect.Method; |
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32 import java.lang.reflect.Modifier; |
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33 import java.security.AccessControlException; |
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34 import java.util.Arrays; |
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35 import java.util.Objects; |
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36 |
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37 import jdk.vm.ci.common.JVMCIError; |
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38 import jdk.internal.org.objectweb.asm.ClassReader; |
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39 import jdk.internal.org.objectweb.asm.ClassVisitor; |
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40 import jdk.internal.org.objectweb.asm.Label; |
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41 import jdk.internal.org.objectweb.asm.MethodVisitor; |
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42 import jdk.internal.org.objectweb.asm.Opcodes; |
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43 import jdk.internal.org.objectweb.asm.Type; |
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44 import sun.misc.Unsafe; |
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45 |
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46 /** |
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47 * A verifier that checks that {@link HotSpotVMConfig} does not access {@link Unsafe} from any of |
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48 * its non-static, non-constructor methods. This ensures that a deserialized {@link HotSpotVMConfig} |
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49 * object does not perform any unsafe reads on addresses that are only valid in the context in which |
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50 * the object was serialized. Note that this does not catch cases where a client uses an address |
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51 * stored in a {@link HotSpotVMConfig} field. |
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52 */ |
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53 final class HotSpotVMConfigVerifier { |
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54 |
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55 public static boolean check() { |
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56 Class<?> cls = HotSpotVMConfig.class; |
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57 String classFilePath = "/" + cls.getName().replace('.', '/') + ".class"; |
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58 try { |
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59 InputStream classfile = cls.getResourceAsStream(classFilePath); |
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60 ClassReader cr = new ClassReader(Objects.requireNonNull(classfile, "Could not find class file for " + cls.getName())); |
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61 ClassVisitor cv = new Verifier(); |
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62 cr.accept(cv, 0); |
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63 return true; |
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64 } catch (AccessControlException e) { |
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65 /* |
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66 * When running with a security manager and +UseJVMCIClassLoader the ASM classes might |
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67 * not be accessible. |
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68 */ |
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69 return true; |
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70 } catch (IOException e) { |
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71 throw new JVMCIError(e); |
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72 } |
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73 } |
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74 |
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75 private static Class<?> resolve(String name) { |
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76 try { |
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77 return Class.forName(name.replace('/', '.')); |
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78 } catch (ClassNotFoundException e) { |
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79 throw new JVMCIError(e); |
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80 } |
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81 } |
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82 |
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83 private static class Verifier extends ClassVisitor { |
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84 |
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85 /** |
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86 * Source file context for error reporting. |
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87 */ |
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88 String sourceFile = null; |
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89 |
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90 /** |
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91 * Line number for error reporting. |
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92 */ |
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93 int lineNo = -1; |
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94 |
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95 Verifier() { |
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96 super(Opcodes.ASM5); |
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97 } |
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98 |
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99 @Override |
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100 public void visitSource(String source, String debug) { |
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101 this.sourceFile = source; |
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102 } |
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103 |
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104 void verify(boolean condition, String message) { |
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105 if (!condition) { |
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106 error(message); |
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107 } |
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108 } |
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109 |
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110 void error(String message) { |
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111 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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112 sourceFile, lineNo, message, HotSpotVMConfig.class.getSimpleName()); |
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113 throw new JVMCIError(errorMessage); |
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114 |
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115 } |
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116 |
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117 @Override |
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118 public MethodVisitor visitMethod(int access, String name, String d, String signature, String[] exceptions) { |
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119 if (!Modifier.isStatic(access) && Modifier.isPublic(access) && !name.equals("<init>")) { |
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120 return new MethodVisitor(Opcodes.ASM5) { |
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121 |
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122 @Override |
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123 public void visitLineNumber(int line, Label start) { |
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124 lineNo = line; |
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125 } |
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126 |
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127 private Executable resolveMethod(String owner, String methodName, String methodDesc) { |
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128 Class<?> declaringClass = resolve(owner); |
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129 while (declaringClass != null) { |
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130 if (methodName.equals("<init>")) { |
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131 for (Constructor<?> c : declaringClass.getDeclaredConstructors()) { |
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132 if (methodDesc.equals(Type.getConstructorDescriptor(c))) { |
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133 return c; |
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134 } |
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135 } |
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136 } else { |
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137 Type[] argumentTypes = Type.getArgumentTypes(methodDesc); |
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138 for (Method m : declaringClass.getDeclaredMethods()) { |
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139 if (m.getName().equals(methodName)) { |
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140 if (Arrays.equals(argumentTypes, Type.getArgumentTypes(m))) { |
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141 if (Type.getReturnType(methodDesc).equals(Type.getReturnType(m))) { |
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142 return m; |
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143 } |
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144 } |
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145 } |
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146 } |
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147 } |
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148 declaringClass = declaringClass.getSuperclass(); |
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149 } |
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150 throw new NoSuchMethodError(owner + "." + methodName + methodDesc); |
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151 } |
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152 |
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153 /** |
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154 * Checks whether a given method is allowed to be called. |
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155 */ |
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156 private boolean checkInvokeTarget(Executable method) { |
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157 if (method.getDeclaringClass().equals(Unsafe.class)) { |
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158 return false; |
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159 } |
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160 return true; |
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161 } |
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162 |
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163 @Override |
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164 public void visitMethodInsn(int opcode, String owner, String methodName, String methodDesc, boolean itf) { |
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165 Executable callee = resolveMethod(owner, methodName, methodDesc); |
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166 verify(checkInvokeTarget(callee), "invocation of " + callee); |
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167 } |
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168 }; |
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169 } else { |
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170 return null; |
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171 } |
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172 } |
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173 } |
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174 } |