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1 //===-- sanitizer_linux_libcdep.cc ----------------------------------------===//
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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 // This file is shared between AddressSanitizer and ThreadSanitizer
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9 // run-time libraries and implements linux-specific functions from
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10 // sanitizer_libc.h.
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11 //===----------------------------------------------------------------------===//
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12
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13 #include "sanitizer_platform.h"
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14
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15 #if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD
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16
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17 #include "sanitizer_allocator_internal.h"
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18 #include "sanitizer_atomic.h"
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19 #include "sanitizer_common.h"
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20 #include "sanitizer_file.h"
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21 #include "sanitizer_flags.h"
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22 #include "sanitizer_freebsd.h"
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23 #include "sanitizer_linux.h"
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24 #include "sanitizer_placement_new.h"
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25 #include "sanitizer_procmaps.h"
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26 #include "sanitizer_stacktrace.h"
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27
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28 #include <dlfcn.h> // for dlsym()
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29 #include <link.h>
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30 #include <pthread.h>
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31 #include <signal.h>
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32 #include <sys/resource.h>
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33 #include <syslog.h>
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34
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35 #if SANITIZER_FREEBSD
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36 #include <pthread_np.h>
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37 #include <osreldate.h>
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38 #define pthread_getattr_np pthread_attr_get_np
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39 #endif
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40
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41 #if SANITIZER_LINUX
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42 #include <sys/prctl.h>
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43 #endif
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44
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45 #if SANITIZER_ANDROID
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46 #include <android/api-level.h>
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47 #endif
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48
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49 #if SANITIZER_ANDROID && __ANDROID_API__ < 21
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50 #include <android/log.h>
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51 #endif
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52
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53 #if !SANITIZER_ANDROID
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54 #include <elf.h>
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55 #include <unistd.h>
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56 #endif
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57
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58 namespace __sanitizer {
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59
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60 SANITIZER_WEAK_ATTRIBUTE int
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61 real_sigaction(int signum, const void *act, void *oldact);
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62
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63 int internal_sigaction(int signum, const void *act, void *oldact) {
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64 #if !SANITIZER_GO
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65 if (&real_sigaction)
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66 return real_sigaction(signum, act, oldact);
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67 #endif
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68 return sigaction(signum, (const struct sigaction *)act,
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69 (struct sigaction *)oldact);
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70 }
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71
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72 void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top,
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73 uptr *stack_bottom) {
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74 CHECK(stack_top);
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75 CHECK(stack_bottom);
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76 if (at_initialization) {
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77 // This is the main thread. Libpthread may not be initialized yet.
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78 struct rlimit rl;
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79 CHECK_EQ(getrlimit(RLIMIT_STACK, &rl), 0);
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80
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81 // Find the mapping that contains a stack variable.
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82 MemoryMappingLayout proc_maps(/*cache_enabled*/true);
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83 MemoryMappedSegment segment;
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84 uptr prev_end = 0;
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85 while (proc_maps.Next(&segment)) {
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86 if ((uptr)&rl < segment.end) break;
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87 prev_end = segment.end;
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88 }
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89 CHECK((uptr)&rl >= segment.start && (uptr)&rl < segment.end);
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90
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91 // Get stacksize from rlimit, but clip it so that it does not overlap
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92 // with other mappings.
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93 uptr stacksize = rl.rlim_cur;
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94 if (stacksize > segment.end - prev_end) stacksize = segment.end - prev_end;
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95 // When running with unlimited stack size, we still want to set some limit.
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96 // The unlimited stack size is caused by 'ulimit -s unlimited'.
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97 // Also, for some reason, GNU make spawns subprocesses with unlimited stack.
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98 if (stacksize > kMaxThreadStackSize)
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99 stacksize = kMaxThreadStackSize;
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100 *stack_top = segment.end;
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101 *stack_bottom = segment.end - stacksize;
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102 return;
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103 }
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104 pthread_attr_t attr;
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105 pthread_attr_init(&attr);
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106 CHECK_EQ(pthread_getattr_np(pthread_self(), &attr), 0);
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107 uptr stacksize = 0;
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108 void *stackaddr = nullptr;
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109 my_pthread_attr_getstack(&attr, &stackaddr, &stacksize);
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110 pthread_attr_destroy(&attr);
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111
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112 *stack_top = (uptr)stackaddr + stacksize;
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113 *stack_bottom = (uptr)stackaddr;
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114 }
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115
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116 #if !SANITIZER_GO
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117 bool SetEnv(const char *name, const char *value) {
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118 void *f = dlsym(RTLD_NEXT, "setenv");
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119 if (!f)
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120 return false;
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121 typedef int(*setenv_ft)(const char *name, const char *value, int overwrite);
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122 setenv_ft setenv_f;
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123 CHECK_EQ(sizeof(setenv_f), sizeof(f));
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124 internal_memcpy(&setenv_f, &f, sizeof(f));
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125 return setenv_f(name, value, 1) == 0;
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126 }
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127 #endif
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128
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129 bool SanitizerSetThreadName(const char *name) {
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130 #ifdef PR_SET_NAME
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131 return 0 == prctl(PR_SET_NAME, (unsigned long)name, 0, 0, 0); // NOLINT
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132 #else
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133 return false;
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134 #endif
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135 }
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136
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137 bool SanitizerGetThreadName(char *name, int max_len) {
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138 #ifdef PR_GET_NAME
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139 char buff[17];
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140 if (prctl(PR_GET_NAME, (unsigned long)buff, 0, 0, 0)) // NOLINT
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141 return false;
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142 internal_strncpy(name, buff, max_len);
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143 name[max_len] = 0;
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144 return true;
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145 #else
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146 return false;
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147 #endif
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148 }
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149
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150 #if !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO && \
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151 !SANITIZER_NETBSD
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152 static uptr g_tls_size;
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153
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154 #ifdef __i386__
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155 # define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
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156 #else
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157 # define DL_INTERNAL_FUNCTION
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158 #endif
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159
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160 void InitTlsSize() {
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161 // all current supported platforms have 16 bytes stack alignment
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162 const size_t kStackAlign = 16;
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163 typedef void (*get_tls_func)(size_t*, size_t*) DL_INTERNAL_FUNCTION;
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164 get_tls_func get_tls;
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165 void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info");
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166 CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr));
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167 internal_memcpy(&get_tls, &get_tls_static_info_ptr,
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168 sizeof(get_tls_static_info_ptr));
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169 CHECK_NE(get_tls, 0);
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170 size_t tls_size = 0;
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171 size_t tls_align = 0;
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172 get_tls(&tls_size, &tls_align);
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173 if (tls_align < kStackAlign)
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174 tls_align = kStackAlign;
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175 g_tls_size = RoundUpTo(tls_size, tls_align);
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176 }
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177 #else
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178 void InitTlsSize() { }
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179 #endif // !SANITIZER_FREEBSD && !SANITIZER_ANDROID && !SANITIZER_GO &&
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180 // !SANITIZER_NETBSD
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181
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182 #if (defined(__x86_64__) || defined(__i386__) || defined(__mips__) \
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183 || defined(__aarch64__) || defined(__powerpc64__) || defined(__s390__) \
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184 || defined(__arm__)) && SANITIZER_LINUX && !SANITIZER_ANDROID
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185 // sizeof(struct pthread) from glibc.
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186 static atomic_uintptr_t kThreadDescriptorSize;
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187
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188 uptr ThreadDescriptorSize() {
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189 uptr val = atomic_load(&kThreadDescriptorSize, memory_order_relaxed);
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190 if (val)
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191 return val;
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192 #if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
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193 #ifdef _CS_GNU_LIBC_VERSION
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194 char buf[64];
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195 uptr len = confstr(_CS_GNU_LIBC_VERSION, buf, sizeof(buf));
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196 if (len < sizeof(buf) && internal_strncmp(buf, "glibc 2.", 8) == 0) {
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197 char *end;
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198 int minor = internal_simple_strtoll(buf + 8, &end, 10);
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199 if (end != buf + 8 && (*end == '\0' || *end == '.' || *end == '-')) {
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200 int patch = 0;
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201 if (*end == '.')
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202 // strtoll will return 0 if no valid conversion could be performed
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203 patch = internal_simple_strtoll(end + 1, nullptr, 10);
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204
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205 /* sizeof(struct pthread) values from various glibc versions. */
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206 if (SANITIZER_X32)
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207 val = 1728; // Assume only one particular version for x32.
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208 // For ARM sizeof(struct pthread) changed in Glibc 2.23.
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209 else if (SANITIZER_ARM)
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210 val = minor <= 22 ? 1120 : 1216;
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211 else if (minor <= 3)
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212 val = FIRST_32_SECOND_64(1104, 1696);
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213 else if (minor == 4)
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214 val = FIRST_32_SECOND_64(1120, 1728);
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215 else if (minor == 5)
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216 val = FIRST_32_SECOND_64(1136, 1728);
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217 else if (minor <= 9)
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218 val = FIRST_32_SECOND_64(1136, 1712);
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219 else if (minor == 10)
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220 val = FIRST_32_SECOND_64(1168, 1776);
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221 else if (minor == 11 || (minor == 12 && patch == 1))
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222 val = FIRST_32_SECOND_64(1168, 2288);
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223 else if (minor <= 13)
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224 val = FIRST_32_SECOND_64(1168, 2304);
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225 else
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226 val = FIRST_32_SECOND_64(1216, 2304);
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227 }
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228 if (val)
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229 atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed);
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230 return val;
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231 }
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232 #endif
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233 #elif defined(__mips__)
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234 // TODO(sagarthakur): add more values as per different glibc versions.
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235 val = FIRST_32_SECOND_64(1152, 1776);
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236 if (val)
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237 atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed);
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238 return val;
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239 #elif defined(__aarch64__)
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240 // The sizeof (struct pthread) is the same from GLIBC 2.17 to 2.22.
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241 val = 1776;
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242 atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed);
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243 return val;
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244 #elif defined(__powerpc64__)
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245 val = 1776; // from glibc.ppc64le 2.20-8.fc21
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246 atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed);
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247 return val;
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248 #elif defined(__s390__)
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249 val = FIRST_32_SECOND_64(1152, 1776); // valid for glibc 2.22
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250 atomic_store(&kThreadDescriptorSize, val, memory_order_relaxed);
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251 #endif
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252 return 0;
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253 }
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254
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255 // The offset at which pointer to self is located in the thread descriptor.
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256 const uptr kThreadSelfOffset = FIRST_32_SECOND_64(8, 16);
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257
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258 uptr ThreadSelfOffset() {
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259 return kThreadSelfOffset;
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260 }
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261
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262 #if defined(__mips__) || defined(__powerpc64__)
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263 // TlsPreTcbSize includes size of struct pthread_descr and size of tcb
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264 // head structure. It lies before the static tls blocks.
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265 static uptr TlsPreTcbSize() {
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266 # if defined(__mips__)
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267 const uptr kTcbHead = 16; // sizeof (tcbhead_t)
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268 # elif defined(__powerpc64__)
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269 const uptr kTcbHead = 88; // sizeof (tcbhead_t)
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270 # endif
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271 const uptr kTlsAlign = 16;
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272 const uptr kTlsPreTcbSize =
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273 RoundUpTo(ThreadDescriptorSize() + kTcbHead, kTlsAlign);
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274 return kTlsPreTcbSize;
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275 }
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276 #endif
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277
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278 uptr ThreadSelf() {
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279 uptr descr_addr;
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280 # if defined(__i386__)
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281 asm("mov %%gs:%c1,%0" : "=r"(descr_addr) : "i"(kThreadSelfOffset));
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282 # elif defined(__x86_64__)
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283 asm("mov %%fs:%c1,%0" : "=r"(descr_addr) : "i"(kThreadSelfOffset));
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284 # elif defined(__mips__)
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285 // MIPS uses TLS variant I. The thread pointer (in hardware register $29)
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286 // points to the end of the TCB + 0x7000. The pthread_descr structure is
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287 // immediately in front of the TCB. TlsPreTcbSize() includes the size of the
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288 // TCB and the size of pthread_descr.
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289 const uptr kTlsTcbOffset = 0x7000;
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290 uptr thread_pointer;
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291 asm volatile(".set push;\
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292 .set mips64r2;\
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293 rdhwr %0,$29;\
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294 .set pop" : "=r" (thread_pointer));
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295 descr_addr = thread_pointer - kTlsTcbOffset - TlsPreTcbSize();
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296 # elif defined(__aarch64__) || defined(__arm__)
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297 descr_addr = reinterpret_cast<uptr>(__builtin_thread_pointer()) -
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298 ThreadDescriptorSize();
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299 # elif defined(__s390__)
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300 descr_addr = reinterpret_cast<uptr>(__builtin_thread_pointer());
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301 # elif defined(__powerpc64__)
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302 // PPC64LE uses TLS variant I. The thread pointer (in GPR 13)
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303 // points to the end of the TCB + 0x7000. The pthread_descr structure is
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304 // immediately in front of the TCB. TlsPreTcbSize() includes the size of the
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305 // TCB and the size of pthread_descr.
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306 const uptr kTlsTcbOffset = 0x7000;
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307 uptr thread_pointer;
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308 asm("addi %0,13,%1" : "=r"(thread_pointer) : "I"(-kTlsTcbOffset));
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309 descr_addr = thread_pointer - TlsPreTcbSize();
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310 # else
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311 # error "unsupported CPU arch"
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312 # endif
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313 return descr_addr;
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314 }
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315 #endif // (x86_64 || i386 || MIPS) && SANITIZER_LINUX
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316
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317 #if SANITIZER_FREEBSD
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318 static void **ThreadSelfSegbase() {
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319 void **segbase = 0;
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320 # if defined(__i386__)
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321 // sysarch(I386_GET_GSBASE, segbase);
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322 __asm __volatile("mov %%gs:0, %0" : "=r" (segbase));
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323 # elif defined(__x86_64__)
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324 // sysarch(AMD64_GET_FSBASE, segbase);
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325 __asm __volatile("movq %%fs:0, %0" : "=r" (segbase));
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326 # else
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327 # error "unsupported CPU arch for FreeBSD platform"
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328 # endif
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329 return segbase;
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330 }
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331
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332 uptr ThreadSelf() {
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333 return (uptr)ThreadSelfSegbase()[2];
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334 }
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335 #elif SANITIZER_NETBSD
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336 uptr ThreadSelf() { return (uptr)pthread_self(); }
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337 #endif // SANITIZER_NETBSD
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338
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339 #if !SANITIZER_GO
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340 static void GetTls(uptr *addr, uptr *size) {
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341 #if SANITIZER_LINUX && !SANITIZER_ANDROID
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342 # if defined(__x86_64__) || defined(__i386__) || defined(__s390__)
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343 *addr = ThreadSelf();
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344 *size = GetTlsSize();
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345 *addr -= *size;
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346 *addr += ThreadDescriptorSize();
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347 # elif defined(__mips__) || defined(__aarch64__) || defined(__powerpc64__) \
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348 || defined(__arm__)
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349 *addr = ThreadSelf();
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350 *size = GetTlsSize();
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351 # else
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352 *addr = 0;
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353 *size = 0;
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354 # endif
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355 #elif SANITIZER_FREEBSD
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356 void** segbase = ThreadSelfSegbase();
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357 *addr = 0;
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358 *size = 0;
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359 if (segbase != 0) {
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360 // tcbalign = 16
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361 // tls_size = round(tls_static_space, tcbalign);
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362 // dtv = segbase[1];
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363 // dtv[2] = segbase - tls_static_space;
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364 void **dtv = (void**) segbase[1];
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365 *addr = (uptr) dtv[2];
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366 *size = (*addr == 0) ? 0 : ((uptr) segbase[0] - (uptr) dtv[2]);
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367 }
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368 #elif SANITIZER_ANDROID || SANITIZER_NETBSD
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369 *addr = 0;
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370 *size = 0;
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371 #else
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372 # error "Unknown OS"
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373 #endif
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|
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374 }
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|
|
375 #endif
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376
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|
|
377 #if !SANITIZER_GO
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378 uptr GetTlsSize() {
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|
379 #if SANITIZER_FREEBSD || SANITIZER_ANDROID || SANITIZER_NETBSD
|
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380 uptr addr, size;
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381 GetTls(&addr, &size);
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382 return size;
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383 #elif defined(__mips__) || defined(__powerpc64__)
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384 return RoundUpTo(g_tls_size + TlsPreTcbSize(), 16);
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385 #else
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386 return g_tls_size;
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387 #endif
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388 }
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389 #endif
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390
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391 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
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392 uptr *tls_addr, uptr *tls_size) {
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393 #if SANITIZER_GO
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394 // Stub implementation for Go.
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395 *stk_addr = *stk_size = *tls_addr = *tls_size = 0;
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396 #else
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397 GetTls(tls_addr, tls_size);
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398
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|
399 uptr stack_top, stack_bottom;
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400 GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom);
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401 *stk_addr = stack_bottom;
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|
402 *stk_size = stack_top - stack_bottom;
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403
|
|
|
404 if (!main) {
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|
405 // If stack and tls intersect, make them non-intersecting.
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|
406 if (*tls_addr > *stk_addr && *tls_addr < *stk_addr + *stk_size) {
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407 CHECK_GT(*tls_addr + *tls_size, *stk_addr);
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408 CHECK_LE(*tls_addr + *tls_size, *stk_addr + *stk_size);
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409 *stk_size -= *tls_size;
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|
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410 *tls_addr = *stk_addr + *stk_size;
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|
|
411 }
|
|
|
412 }
|
|
|
413 #endif
|
|
|
414 }
|
|
|
415
|
|
|
416 # if !SANITIZER_FREEBSD
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417 typedef ElfW(Phdr) Elf_Phdr;
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|
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418 # elif SANITIZER_WORDSIZE == 32 && __FreeBSD_version <= 902001 // v9.2
|
|
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419 # define Elf_Phdr XElf32_Phdr
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420 # define dl_phdr_info xdl_phdr_info
|
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421 # define dl_iterate_phdr(c, b) xdl_iterate_phdr((c), (b))
|
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422 # endif
|
|
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423
|
|
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424 struct DlIteratePhdrData {
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425 InternalMmapVectorNoCtor<LoadedModule> *modules;
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|
|
426 bool first;
|
|
|
427 };
|
|
|
428
|
|
|
429 static int dl_iterate_phdr_cb(dl_phdr_info *info, size_t size, void *arg) {
|
|
|
430 DlIteratePhdrData *data = (DlIteratePhdrData*)arg;
|
|
|
431 InternalScopedString module_name(kMaxPathLength);
|
|
|
432 if (data->first) {
|
|
|
433 data->first = false;
|
|
|
434 // First module is the binary itself.
|
|
|
435 ReadBinaryNameCached(module_name.data(), module_name.size());
|
|
|
436 } else if (info->dlpi_name) {
|
|
|
437 module_name.append("%s", info->dlpi_name);
|
|
|
438 }
|
|
|
439 if (module_name[0] == '\0')
|
|
|
440 return 0;
|
|
|
441 LoadedModule cur_module;
|
|
|
442 cur_module.set(module_name.data(), info->dlpi_addr);
|
|
|
443 for (int i = 0; i < info->dlpi_phnum; i++) {
|
|
|
444 const Elf_Phdr *phdr = &info->dlpi_phdr[i];
|
|
|
445 if (phdr->p_type == PT_LOAD) {
|
|
|
446 uptr cur_beg = info->dlpi_addr + phdr->p_vaddr;
|
|
|
447 uptr cur_end = cur_beg + phdr->p_memsz;
|
|
|
448 bool executable = phdr->p_flags & PF_X;
|
|
|
449 bool writable = phdr->p_flags & PF_W;
|
|
|
450 cur_module.addAddressRange(cur_beg, cur_end, executable,
|
|
|
451 writable);
|
|
|
452 }
|
|
|
453 }
|
|
|
454 data->modules->push_back(cur_module);
|
|
|
455 return 0;
|
|
|
456 }
|
|
|
457
|
|
|
458 #if SANITIZER_ANDROID && __ANDROID_API__ < 21
|
|
|
459 extern "C" __attribute__((weak)) int dl_iterate_phdr(
|
|
|
460 int (*)(struct dl_phdr_info *, size_t, void *), void *);
|
|
|
461 #endif
|
|
|
462
|
|
|
463 static bool requiresProcmaps() {
|
|
|
464 #if SANITIZER_ANDROID && __ANDROID_API__ <= 22
|
|
|
465 // Fall back to /proc/maps if dl_iterate_phdr is unavailable or broken.
|
|
|
466 // The runtime check allows the same library to work with
|
|
|
467 // both K and L (and future) Android releases.
|
|
|
468 return AndroidGetApiLevel() <= ANDROID_LOLLIPOP_MR1;
|
|
|
469 #else
|
|
|
470 return false;
|
|
|
471 #endif
|
|
|
472 }
|
|
|
473
|
|
|
474 static void procmapsInit(InternalMmapVectorNoCtor<LoadedModule> *modules) {
|
|
|
475 MemoryMappingLayout memory_mapping(/*cache_enabled*/true);
|
|
|
476 memory_mapping.DumpListOfModules(modules);
|
|
|
477 }
|
|
|
478
|
|
|
479 void ListOfModules::init() {
|
|
|
480 clearOrInit();
|
|
|
481 if (requiresProcmaps()) {
|
|
|
482 procmapsInit(&modules_);
|
|
|
483 } else {
|
|
|
484 DlIteratePhdrData data = {&modules_, true};
|
|
|
485 dl_iterate_phdr(dl_iterate_phdr_cb, &data);
|
|
|
486 }
|
|
|
487 }
|
|
|
488
|
|
|
489 // When a custom loader is used, dl_iterate_phdr may not contain the full
|
|
|
490 // list of modules. Allow callers to fall back to using procmaps.
|
|
|
491 void ListOfModules::fallbackInit() {
|
|
|
492 if (!requiresProcmaps()) {
|
|
|
493 clearOrInit();
|
|
|
494 procmapsInit(&modules_);
|
|
|
495 } else {
|
|
|
496 clear();
|
|
|
497 }
|
|
|
498 }
|
|
|
499
|
|
|
500 // getrusage does not give us the current RSS, only the max RSS.
|
|
|
501 // Still, this is better than nothing if /proc/self/statm is not available
|
|
|
502 // for some reason, e.g. due to a sandbox.
|
|
|
503 static uptr GetRSSFromGetrusage() {
|
|
|
504 struct rusage usage;
|
|
|
505 if (getrusage(RUSAGE_SELF, &usage)) // Failed, probably due to a sandbox.
|
|
|
506 return 0;
|
|
|
507 return usage.ru_maxrss << 10; // ru_maxrss is in Kb.
|
|
|
508 }
|
|
|
509
|
|
|
510 uptr GetRSS() {
|
|
|
511 if (!common_flags()->can_use_proc_maps_statm)
|
|
|
512 return GetRSSFromGetrusage();
|
|
|
513 fd_t fd = OpenFile("/proc/self/statm", RdOnly);
|
|
|
514 if (fd == kInvalidFd)
|
|
|
515 return GetRSSFromGetrusage();
|
|
|
516 char buf[64];
|
|
|
517 uptr len = internal_read(fd, buf, sizeof(buf) - 1);
|
|
|
518 internal_close(fd);
|
|
|
519 if ((sptr)len <= 0)
|
|
|
520 return 0;
|
|
|
521 buf[len] = 0;
|
|
|
522 // The format of the file is:
|
|
|
523 // 1084 89 69 11 0 79 0
|
|
|
524 // We need the second number which is RSS in pages.
|
|
|
525 char *pos = buf;
|
|
|
526 // Skip the first number.
|
|
|
527 while (*pos >= '0' && *pos <= '9')
|
|
|
528 pos++;
|
|
|
529 // Skip whitespaces.
|
|
|
530 while (!(*pos >= '0' && *pos <= '9') && *pos != 0)
|
|
|
531 pos++;
|
|
|
532 // Read the number.
|
|
|
533 uptr rss = 0;
|
|
|
534 while (*pos >= '0' && *pos <= '9')
|
|
|
535 rss = rss * 10 + *pos++ - '0';
|
|
|
536 return rss * GetPageSizeCached();
|
|
|
537 }
|
|
|
538
|
|
|
539 // 64-bit Android targets don't provide the deprecated __android_log_write.
|
|
|
540 // Starting with the L release, syslog() works and is preferable to
|
|
|
541 // __android_log_write.
|
|
|
542 #if SANITIZER_LINUX
|
|
|
543
|
|
|
544 #if SANITIZER_ANDROID
|
|
|
545 static atomic_uint8_t android_log_initialized;
|
|
|
546
|
|
|
547 void AndroidLogInit() {
|
|
|
548 openlog(GetProcessName(), 0, LOG_USER);
|
|
|
549 atomic_store(&android_log_initialized, 1, memory_order_release);
|
|
|
550 }
|
|
|
551
|
|
|
552 static bool ShouldLogAfterPrintf() {
|
|
|
553 return atomic_load(&android_log_initialized, memory_order_acquire);
|
|
|
554 }
|
|
|
555 #else
|
|
|
556 void AndroidLogInit() {}
|
|
|
557
|
|
|
558 static bool ShouldLogAfterPrintf() { return true; }
|
|
|
559 #endif // SANITIZER_ANDROID
|
|
|
560
|
|
|
561 void WriteOneLineToSyslog(const char *s) {
|
|
|
562 #if SANITIZER_ANDROID &&__ANDROID_API__ < 21
|
|
|
563 __android_log_write(ANDROID_LOG_INFO, NULL, s);
|
|
|
564 #else
|
|
|
565 syslog(LOG_INFO, "%s", s);
|
|
|
566 #endif
|
|
|
567 }
|
|
|
568
|
|
|
569 void LogMessageOnPrintf(const char *str) {
|
|
|
570 if (common_flags()->log_to_syslog && ShouldLogAfterPrintf())
|
|
|
571 WriteToSyslog(str);
|
|
|
572 }
|
|
|
573
|
|
|
574 #if SANITIZER_ANDROID
|
|
|
575 extern "C" __attribute__((weak)) void android_set_abort_message(const char *);
|
|
|
576 void SetAbortMessage(const char *str) {
|
|
|
577 if (&android_set_abort_message) android_set_abort_message(str);
|
|
|
578 }
|
|
|
579 #else
|
|
|
580 void SetAbortMessage(const char *str) {}
|
|
|
581 #endif
|
|
|
582
|
|
|
583 #endif // SANITIZER_LINUX
|
|
|
584
|
|
|
585 } // namespace __sanitizer
|
|
|
586
|
|
|
587 #endif // SANITIZER_FREEBSD || SANITIZER_LINUX
|
