1 //===-- sanitizer_internal_defs.h -------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file is shared between AddressSanitizer and ThreadSanitizer. 11 // It contains macro used in run-time libraries code. 12 //===----------------------------------------------------------------------===// 13 #ifndef SANITIZER_DEFS_H 14 #define SANITIZER_DEFS_H 15 16 #include "sanitizer_platform.h" 17 18 #if SANITIZER_WINDOWS 19 // FIXME find out what we need on Windows. __declspec(dllexport) ? 20 # define SANITIZER_INTERFACE_ATTRIBUTE 21 # define SANITIZER_WEAK_ATTRIBUTE 22 #elif defined(SANITIZER_GO) 23 # define SANITIZER_INTERFACE_ATTRIBUTE 24 # define SANITIZER_WEAK_ATTRIBUTE 25 #else 26 # define SANITIZER_INTERFACE_ATTRIBUTE __attribute__((visibility("default"))) 27 # define SANITIZER_WEAK_ATTRIBUTE __attribute__((weak)) 28 #endif 29 30 #if SANITIZER_LINUX && !defined(SANITIZER_GO) 31 # define SANITIZER_SUPPORTS_WEAK_HOOKS 1 32 #else 33 # define SANITIZER_SUPPORTS_WEAK_HOOKS 0 34 #endif 35 36 // GCC does not understand __has_feature 37 #if !defined(__has_feature) 38 # define __has_feature(x) 0 39 #endif 40 41 // For portability reasons we do not include stddef.h, stdint.h or any other 42 // system header, but we do need some basic types that are not defined 43 // in a portable way by the language itself. 44 namespace __sanitizer { 45 46 #if defined(_WIN64) 47 // 64-bit Windows uses LLP64 data model. 48 typedef unsigned long long uptr; // NOLINT 49 typedef signed long long sptr; // NOLINT 50 #else 51 typedef unsigned long uptr; // NOLINT 52 typedef signed long sptr; // NOLINT 53 #endif // defined(_WIN64) 54 #if defined(__x86_64__) 55 // Since x32 uses ILP32 data model in 64-bit hardware mode, we must use 56 // 64-bit pointer to unwind stack frame. 57 typedef unsigned long long uhwptr; // NOLINT 58 #else 59 typedef uptr uhwptr; // NOLINT 60 #endif 61 typedef unsigned char u8; 62 typedef unsigned short u16; // NOLINT 63 typedef unsigned int u32; 64 typedef unsigned long long u64; // NOLINT 65 typedef signed char s8; 66 typedef signed short s16; // NOLINT 67 typedef signed int s32; 68 typedef signed long long s64; // NOLINT 69 typedef int fd_t; 70 71 // WARNING: OFF_T may be different from OS type off_t, depending on the value of 72 // _FILE_OFFSET_BITS. This definition of OFF_T matches the ABI of system calls 73 // like pread and mmap, as opposed to pread64 and mmap64. 74 // Mac and Linux/x86-64 are special. 75 #if SANITIZER_MAC || (SANITIZER_LINUX && defined(__x86_64__)) 76 typedef u64 OFF_T; 77 #else 78 typedef uptr OFF_T; 79 #endif 80 typedef u64 OFF64_T; 81 } // namespace __sanitizer 82 83 extern "C" { 84 // Tell the tools to write their reports to "path.<pid>" instead of stderr. 85 void __sanitizer_set_report_path(const char *path) 86 SANITIZER_INTERFACE_ATTRIBUTE; 87 88 // Tell the tools to write their reports to given file descriptor instead of 89 // stderr. 90 void __sanitizer_set_report_fd(int fd) 91 SANITIZER_INTERFACE_ATTRIBUTE; 92 93 // Notify the tools that the sandbox is going to be turned on. The reserved 94 // parameter will be used in the future to hold a structure with functions 95 // that the tools may call to bypass the sandbox. 96 void __sanitizer_sandbox_on_notify(void *reserved) 97 SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; 98 99 // This function is called by the tool when it has just finished reporting 100 // an error. 'error_summary' is a one-line string that summarizes 101 // the error message. This function can be overridden by the client. 102 void __sanitizer_report_error_summary(const char *error_summary) 103 SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE; 104 } // extern "C" 105 106 107 using namespace __sanitizer; // NOLINT 108 // ----------- ATTENTION ------------- 109 // This header should NOT include any other headers to avoid portability issues. 110 111 // Common defs. 112 #define INLINE inline 113 #define INTERFACE_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE 114 #define WEAK SANITIZER_WEAK_ATTRIBUTE 115 116 // Platform-specific defs. 117 #if defined(_MSC_VER) 118 # define ALWAYS_INLINE __forceinline 119 // FIXME(timurrrr): do we need this on Windows? 120 # define ALIAS(x) 121 # define ALIGNED(x) __declspec(align(x)) 122 # define FORMAT(f, a) 123 # define NOINLINE __declspec(noinline) 124 # define NORETURN __declspec(noreturn) 125 # define THREADLOCAL __declspec(thread) 126 # define NOTHROW 127 # define LIKELY(x) (x) 128 # define UNLIKELY(x) (x) 129 # define UNUSED 130 # define USED 131 # define PREFETCH(x) /* _mm_prefetch(x, _MM_HINT_NTA) */ 132 #else // _MSC_VER 133 # define ALWAYS_INLINE inline __attribute__((always_inline)) 134 # define ALIAS(x) __attribute__((alias(x))) 135 // Please only use the ALIGNED macro before the type. 136 // Using ALIGNED after the variable declaration is not portable! 137 # define ALIGNED(x) __attribute__((aligned(x))) 138 # define FORMAT(f, a) __attribute__((format(printf, f, a))) 139 # define NOINLINE __attribute__((noinline)) 140 # define NORETURN __attribute__((noreturn)) 141 # define THREADLOCAL __thread 142 # define NOTHROW throw() 143 # define LIKELY(x) __builtin_expect(!!(x), 1) 144 # define UNLIKELY(x) __builtin_expect(!!(x), 0) 145 # define UNUSED __attribute__((unused)) 146 # define USED __attribute__((used)) 147 # if defined(__i386__) || defined(__x86_64__) 148 // __builtin_prefetch(x) generates prefetchnt0 on x86 149 # define PREFETCH(x) __asm__("prefetchnta (%0)" : : "r" (x)) 150 # else 151 # define PREFETCH(x) __builtin_prefetch(x) 152 # endif 153 #endif // _MSC_VER 154 155 // Unaligned versions of basic types. 156 typedef ALIGNED(1) u16 uu16; 157 typedef ALIGNED(1) u32 uu32; 158 typedef ALIGNED(1) u64 uu64; 159 typedef ALIGNED(1) s16 us16; 160 typedef ALIGNED(1) s32 us32; 161 typedef ALIGNED(1) s64 us64; 162 163 #if SANITIZER_WINDOWS 164 typedef unsigned long DWORD; // NOLINT 165 typedef DWORD thread_return_t; 166 # define THREAD_CALLING_CONV __stdcall 167 #else // _WIN32 168 typedef void* thread_return_t; 169 # define THREAD_CALLING_CONV 170 #endif // _WIN32 171 typedef thread_return_t (THREAD_CALLING_CONV *thread_callback_t)(void* arg); 172 173 #if __LP64__ || defined(_WIN64) 174 # define SANITIZER_WORDSIZE 64 175 #else 176 # define SANITIZER_WORDSIZE 32 177 #endif 178 179 // NOTE: Functions below must be defined in each run-time. 180 namespace __sanitizer { 181 void NORETURN Die(); 182 void NORETURN CheckFailed(const char *file, int line, const char *cond, 183 u64 v1, u64 v2); 184 } // namespace __sanitizer 185 186 // Check macro 187 #define RAW_CHECK_MSG(expr, msg) do { \ 188 if (!(expr)) { \ 189 RawWrite(msg); \ 190 Die(); \ 191 } \ 192 } while (0) 193 194 #define RAW_CHECK(expr) RAW_CHECK_MSG(expr, #expr) 195 196 #define CHECK_IMPL(c1, op, c2) \ 197 do { \ 198 __sanitizer::u64 v1 = (u64)(c1); \ 199 __sanitizer::u64 v2 = (u64)(c2); \ 200 if (!(v1 op v2)) \ 201 __sanitizer::CheckFailed(__FILE__, __LINE__, \ 202 "(" #c1 ") " #op " (" #c2 ")", v1, v2); \ 203 } while (false) \ 204 /**/ 205 206 #define CHECK(a) CHECK_IMPL((a), !=, 0) 207 #define CHECK_EQ(a, b) CHECK_IMPL((a), ==, (b)) 208 #define CHECK_NE(a, b) CHECK_IMPL((a), !=, (b)) 209 #define CHECK_LT(a, b) CHECK_IMPL((a), <, (b)) 210 #define CHECK_LE(a, b) CHECK_IMPL((a), <=, (b)) 211 #define CHECK_GT(a, b) CHECK_IMPL((a), >, (b)) 212 #define CHECK_GE(a, b) CHECK_IMPL((a), >=, (b)) 213 214 #if TSAN_DEBUG 215 #define DCHECK(a) CHECK(a) 216 #define DCHECK_EQ(a, b) CHECK_EQ(a, b) 217 #define DCHECK_NE(a, b) CHECK_NE(a, b) 218 #define DCHECK_LT(a, b) CHECK_LT(a, b) 219 #define DCHECK_LE(a, b) CHECK_LE(a, b) 220 #define DCHECK_GT(a, b) CHECK_GT(a, b) 221 #define DCHECK_GE(a, b) CHECK_GE(a, b) 222 #else 223 #define DCHECK(a) 224 #define DCHECK_EQ(a, b) 225 #define DCHECK_NE(a, b) 226 #define DCHECK_LT(a, b) 227 #define DCHECK_LE(a, b) 228 #define DCHECK_GT(a, b) 229 #define DCHECK_GE(a, b) 230 #endif 231 232 #define UNREACHABLE(msg) do { \ 233 CHECK(0 && msg); \ 234 Die(); \ 235 } while (0) 236 237 #define UNIMPLEMENTED() UNREACHABLE("unimplemented") 238 239 #define COMPILER_CHECK(pred) IMPL_COMPILER_ASSERT(pred, __LINE__) 240 241 #define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0])) 242 243 #define IMPL_PASTE(a, b) a##b 244 #define IMPL_COMPILER_ASSERT(pred, line) \ 245 typedef char IMPL_PASTE(assertion_failed_##_, line)[2*(int)(pred)-1] 246 247 // Limits for integral types. We have to redefine it in case we don't 248 // have stdint.h (like in Visual Studio 9). 249 #undef __INT64_C 250 #undef __UINT64_C 251 #if SANITIZER_WORDSIZE == 64 252 # define __INT64_C(c) c ## L 253 # define __UINT64_C(c) c ## UL 254 #else 255 # define __INT64_C(c) c ## LL 256 # define __UINT64_C(c) c ## ULL 257 #endif // SANITIZER_WORDSIZE == 64 258 #undef INT32_MIN 259 #define INT32_MIN (-2147483647-1) 260 #undef INT32_MAX 261 #define INT32_MAX (2147483647) 262 #undef UINT32_MAX 263 #define UINT32_MAX (4294967295U) 264 #undef INT64_MIN 265 #define INT64_MIN (-__INT64_C(9223372036854775807)-1) 266 #undef INT64_MAX 267 #define INT64_MAX (__INT64_C(9223372036854775807)) 268 #undef UINT64_MAX 269 #define UINT64_MAX (__UINT64_C(18446744073709551615)) 270 271 enum LinkerInitialized { LINKER_INITIALIZED = 0 }; 272 273 #if !defined(_MSC_VER) || defined(__clang__) 274 # define GET_CALLER_PC() (uptr)__builtin_return_address(0) 275 # define GET_CURRENT_FRAME() (uptr)__builtin_frame_address(0) 276 #else 277 extern "C" void* _ReturnAddress(void); 278 # pragma intrinsic(_ReturnAddress) 279 # define GET_CALLER_PC() (uptr)_ReturnAddress() 280 // CaptureStackBackTrace doesn't need to know BP on Windows. 281 // FIXME: This macro is still used when printing error reports though it's not 282 // clear if the BP value is needed in the ASan reports on Windows. 283 # define GET_CURRENT_FRAME() (uptr)0xDEADBEEF 284 #endif 285 286 #define HANDLE_EINTR(res, f) \ 287 { \ 288 int rverrno; \ 289 do { \ 290 res = (f); \ 291 } while (internal_iserror(res, &rverrno) && rverrno == EINTR); \ 292 } 293 294 #endif // SANITIZER_DEFS_H 295
