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1 //===-- sanitizer_platform.h ------------------------------------*- C++ -*-===//
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2 //
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3 // This file is distributed under the University of Illinois Open Source
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4 // License. See LICENSE.TXT for details.
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5 //
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6 //===----------------------------------------------------------------------===//
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7 //
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8 // Common platform macros.
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9 //===----------------------------------------------------------------------===//
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10
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11 #ifndef SANITIZER_PLATFORM_H
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12 #define SANITIZER_PLATFORM_H
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13
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14 #if !defined(__linux__) && !defined(__FreeBSD__) && !defined(__NetBSD__) && \
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15 !defined(__APPLE__) && !defined(_WIN32) && !defined(__Fuchsia__)
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16 # error "This operating system is not supported"
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17 #endif
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18
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19 #if defined(__linux__)
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20 # define SANITIZER_LINUX 1
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21 #else
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22 # define SANITIZER_LINUX 0
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23 #endif
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24
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25 #if defined(__FreeBSD__)
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26 # define SANITIZER_FREEBSD 1
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27 #else
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28 # define SANITIZER_FREEBSD 0
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29 #endif
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30
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31 #if defined(__NetBSD__)
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32 # define SANITIZER_NETBSD 1
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33 #else
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34 # define SANITIZER_NETBSD 0
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35 #endif
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36
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37 #if defined(__APPLE__)
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38 # define SANITIZER_MAC 1
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39 # include <TargetConditionals.h>
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40 # if TARGET_OS_IPHONE
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41 # define SANITIZER_IOS 1
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42 # else
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43 # define SANITIZER_IOS 0
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44 # endif
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45 # if TARGET_IPHONE_SIMULATOR
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46 # define SANITIZER_IOSSIM 1
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47 # else
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48 # define SANITIZER_IOSSIM 0
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49 # endif
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50 #else
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51 # define SANITIZER_MAC 0
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52 # define SANITIZER_IOS 0
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53 # define SANITIZER_IOSSIM 0
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54 #endif
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55
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56 #if defined(__APPLE__) && TARGET_OS_IPHONE && TARGET_OS_WATCH
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57 # define SANITIZER_WATCHOS 1
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58 #else
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59 # define SANITIZER_WATCHOS 0
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60 #endif
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61
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62 #if defined(__APPLE__) && TARGET_OS_IPHONE && TARGET_OS_TV
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63 # define SANITIZER_TVOS 1
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64 #else
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65 # define SANITIZER_TVOS 0
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66 #endif
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67
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68 #if defined(_WIN32)
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69 # define SANITIZER_WINDOWS 1
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70 #else
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71 # define SANITIZER_WINDOWS 0
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72 #endif
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73
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74 #if defined(_WIN64)
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75 # define SANITIZER_WINDOWS64 1
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76 #else
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77 # define SANITIZER_WINDOWS64 0
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78 #endif
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79
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80 #if defined(__ANDROID__)
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81 # define SANITIZER_ANDROID 1
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82 #else
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83 # define SANITIZER_ANDROID 0
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84 #endif
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85
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86 #if defined(__Fuchsia__)
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87 # define SANITIZER_FUCHSIA 1
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88 #else
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89 # define SANITIZER_FUCHSIA 0
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90 #endif
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91
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92 #define SANITIZER_POSIX \
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93 (SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_MAC || SANITIZER_NETBSD)
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94
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95 #if __LP64__ || defined(_WIN64)
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96 # define SANITIZER_WORDSIZE 64
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97 #else
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98 # define SANITIZER_WORDSIZE 32
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99 #endif
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100
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101 #if SANITIZER_WORDSIZE == 64
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102 # define FIRST_32_SECOND_64(a, b) (b)
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103 #else
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104 # define FIRST_32_SECOND_64(a, b) (a)
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105 #endif
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106
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107 #if defined(__x86_64__) && !defined(_LP64)
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108 # define SANITIZER_X32 1
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109 #else
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110 # define SANITIZER_X32 0
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111 #endif
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112
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113 #if defined(__mips__)
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114 # define SANITIZER_MIPS 1
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115 # if defined(__mips64)
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116 # define SANITIZER_MIPS32 0
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117 # define SANITIZER_MIPS64 1
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118 # else
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119 # define SANITIZER_MIPS32 1
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120 # define SANITIZER_MIPS64 0
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121 # endif
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122 #else
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123 # define SANITIZER_MIPS 0
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124 # define SANITIZER_MIPS32 0
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125 # define SANITIZER_MIPS64 0
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126 #endif
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127
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128 #if defined(__s390__)
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129 # define SANITIZER_S390 1
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130 # if defined(__s390x__)
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131 # define SANITIZER_S390_31 0
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132 # define SANITIZER_S390_64 1
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133 # else
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134 # define SANITIZER_S390_31 1
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135 # define SANITIZER_S390_64 0
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136 # endif
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137 #else
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138 # define SANITIZER_S390 0
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139 # define SANITIZER_S390_31 0
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140 # define SANITIZER_S390_64 0
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141 #endif
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142
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143 #if defined(__powerpc__)
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144 # define SANITIZER_PPC 1
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145 # if defined(__powerpc64__)
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146 # define SANITIZER_PPC32 0
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147 # define SANITIZER_PPC64 1
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148 // 64-bit PPC has two ABIs (v1 and v2). The old powerpc64 target is
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149 // big-endian, and uses v1 ABI (known for its function descriptors),
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150 // while the new powerpc64le target is little-endian and uses v2.
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151 // In theory, you could convince gcc to compile for their evil twins
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152 // (eg. big-endian v2), but you won't find such combinations in the wild
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153 // (it'd require bootstrapping a whole system, which would be quite painful
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154 // - there's no target triple for that). LLVM doesn't support them either.
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155 # if _CALL_ELF == 2
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156 # define SANITIZER_PPC64V1 0
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157 # define SANITIZER_PPC64V2 1
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158 # else
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159 # define SANITIZER_PPC64V1 1
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160 # define SANITIZER_PPC64V2 0
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161 # endif
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162 # else
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163 # define SANITIZER_PPC32 1
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164 # define SANITIZER_PPC64 0
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165 # define SANITIZER_PPC64V1 0
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166 # define SANITIZER_PPC64V2 0
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167 # endif
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168 #else
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169 # define SANITIZER_PPC 0
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170 # define SANITIZER_PPC32 0
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171 # define SANITIZER_PPC64 0
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172 # define SANITIZER_PPC64V1 0
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173 # define SANITIZER_PPC64V2 0
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174 #endif
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175
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176 #if defined(__arm__)
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177 # define SANITIZER_ARM 1
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178 #else
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179 # define SANITIZER_ARM 0
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180 #endif
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181
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182 // By default we allow to use SizeClassAllocator64 on 64-bit platform.
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183 // But in some cases (e.g. AArch64's 39-bit address space) SizeClassAllocator64
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184 // does not work well and we need to fallback to SizeClassAllocator32.
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185 // For such platforms build this code with -DSANITIZER_CAN_USE_ALLOCATOR64=0 or
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186 // change the definition of SANITIZER_CAN_USE_ALLOCATOR64 here.
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187 #ifndef SANITIZER_CAN_USE_ALLOCATOR64
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188 # if (SANITIZER_ANDROID && defined(__aarch64__)) || SANITIZER_FUCHSIA
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189 # define SANITIZER_CAN_USE_ALLOCATOR64 1
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190 # elif defined(__mips64) || defined(__aarch64__)
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191 # define SANITIZER_CAN_USE_ALLOCATOR64 0
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192 # else
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193 # define SANITIZER_CAN_USE_ALLOCATOR64 (SANITIZER_WORDSIZE == 64)
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194 # endif
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195 #endif
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196
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197 // The range of addresses which can be returned my mmap.
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198 // FIXME: this value should be different on different platforms. Larger values
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199 // will still work but will consume more memory for TwoLevelByteMap.
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200 #if defined(__mips__)
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201 # define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 40)
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202 #elif defined(__aarch64__)
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203 # define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 48)
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204 #else
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205 # define SANITIZER_MMAP_RANGE_SIZE FIRST_32_SECOND_64(1ULL << 32, 1ULL << 47)
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206 #endif
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207
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208 // The AArch64 linux port uses the canonical syscall set as mandated by
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209 // the upstream linux community for all new ports. Other ports may still
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210 // use legacy syscalls.
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211 #ifndef SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
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212 # if defined(__aarch64__) && SANITIZER_LINUX
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213 # define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 1
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214 # else
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215 # define SANITIZER_USES_CANONICAL_LINUX_SYSCALLS 0
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216 # endif
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217 #endif
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218
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219 // udi16 syscalls can only be used when the following conditions are
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220 // met:
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221 // * target is one of arm32, x86-32, sparc32, sh or m68k
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222 // * libc version is libc5, glibc-2.0, glibc-2.1 or glibc-2.2 to 2.15
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223 // built against > linux-2.2 kernel headers
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224 // Since we don't want to include libc headers here, we check the
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225 // target only.
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226 #if defined(__arm__) || SANITIZER_X32 || defined(__sparc__)
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227 #define SANITIZER_USES_UID16_SYSCALLS 1
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228 #else
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229 #define SANITIZER_USES_UID16_SYSCALLS 0
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230 #endif
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231
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232 #if defined(__mips__)
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233 # define SANITIZER_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 10)
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234 #else
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235 # define SANITIZER_POINTER_FORMAT_LENGTH FIRST_32_SECOND_64(8, 12)
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236 #endif
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237
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238 // Assume obsolete RPC headers are available by default
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239 #if !defined(HAVE_RPC_XDR_H) && !defined(HAVE_TIRPC_RPC_XDR_H)
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240 # define HAVE_RPC_XDR_H (SANITIZER_LINUX && !SANITIZER_ANDROID)
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241 # define HAVE_TIRPC_RPC_XDR_H 0
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242 #endif
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243
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244 /// \macro MSC_PREREQ
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245 /// \brief Is the compiler MSVC of at least the specified version?
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246 /// The common \param version values to check for are:
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247 /// * 1800: Microsoft Visual Studio 2013 / 12.0
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248 /// * 1900: Microsoft Visual Studio 2015 / 14.0
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249 #ifdef _MSC_VER
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250 # define MSC_PREREQ(version) (_MSC_VER >= (version))
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251 #else
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252 # define MSC_PREREQ(version) 0
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253 #endif
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254
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255 #if defined(__arm64__) && SANITIZER_IOS
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256 # define SANITIZER_NON_UNIQUE_TYPEINFO 1
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257 #else
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258 # define SANITIZER_NON_UNIQUE_TYPEINFO 0
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259 #endif
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260
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261 // On linux, some architectures had an ABI transition from 64-bit long double
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262 // (ie. same as double) to 128-bit long double. On those, glibc symbols
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263 // involving long doubles come in two versions, and we need to pass the
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264 // correct one to dlvsym when intercepting them.
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265 #if SANITIZER_LINUX && (SANITIZER_S390 || SANITIZER_PPC32 || SANITIZER_PPC64V1)
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266 #define SANITIZER_NLDBL_VERSION "GLIBC_2.4"
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267 #endif
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268
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269 #if SANITIZER_GO == 0
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270 # define SANITIZER_GO 0
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271 #endif
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272
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273 // On PowerPC and ARM Thumb, calling pthread_exit() causes LSan to detect leaks.
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274 // pthread_exit() performs unwinding that leads to dlopen'ing libgcc_s.so.
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275 // dlopen mallocs "libgcc_s.so" string which confuses LSan, it fails to realize
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276 // that this allocation happens in dynamic linker and should be ignored.
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277 #if SANITIZER_PPC || defined(__thumb__)
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278 # define SANITIZER_SUPPRESS_LEAK_ON_PTHREAD_EXIT 1
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279 #else
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280 # define SANITIZER_SUPPRESS_LEAK_ON_PTHREAD_EXIT 0
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281 #endif
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282
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283
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284 #endif // SANITIZER_PLATFORM_H
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