compiler-rt/lib/sanitizer_common/sanitizer_internal_defs.h

   1 //===-- sanitizer_internal_defs.h -------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is shared between AddressSanitizer and ThreadSanitizer.
  10 // It contains macro used in run-time libraries code.
  11 //===----------------------------------------------------------------------===//
  12 #ifndef SANITIZER_DEFS_H
  13 #define SANITIZER_DEFS_H
  14
  15 #include "sanitizer_platform.h"
  16 #include "sanitizer_redefine_builtins.h"
  17
  18 // GCC does not understand __has_feature.
  19 #if !defined(__has_feature)
  20 #define __has_feature(x) 0
  21 #endif
  22
  23 #ifndef SANITIZER_DEBUG
  24 # define SANITIZER_DEBUG 0
  25 #endif
  26
  27 #define SANITIZER_STRINGIFY_(S) #S
  28 #define SANITIZER_STRINGIFY(S) SANITIZER_STRINGIFY_(S)
  29
  30 // Only use SANITIZER_*ATTRIBUTE* before the function return type!
  31 #if SANITIZER_WINDOWS
  32 #if SANITIZER_IMPORT_INTERFACE
  33 # define SANITIZER_INTERFACE_ATTRIBUTE __declspec(dllimport)
  34 #else
  35 # define SANITIZER_INTERFACE_ATTRIBUTE __declspec(dllexport)
  36 #endif
  37 # define SANITIZER_WEAK_ATTRIBUTE
  38 #  define SANITIZER_WEAK_IMPORT
  39 #elif SANITIZER_GO
  40 # define SANITIZER_INTERFACE_ATTRIBUTE
  41 # define SANITIZER_WEAK_ATTRIBUTE
  42 #  define SANITIZER_WEAK_IMPORT
  43 #else
  44 # define SANITIZER_INTERFACE_ATTRIBUTE __attribute__((visibility("default")))
  45 # define SANITIZER_WEAK_ATTRIBUTE  __attribute__((weak))
  46 #  if SANITIZER_APPLE
  47 #    define SANITIZER_WEAK_IMPORT extern "C" __attribute((weak_import))
  48 #  else
  49 #    define SANITIZER_WEAK_IMPORT extern "C" SANITIZER_WEAK_ATTRIBUTE
  50 #  endif  // SANITIZER_APPLE
  51 #endif    // SANITIZER_WINDOWS
  52
  53 //--------------------------- WEAK FUNCTIONS ---------------------------------//
  54 // When working with weak functions, to simplify the code and make it more
  55 // portable, when possible define a default implementation using this macro:
  56 //
  57 // SANITIZER_INTERFACE_WEAK_DEF(<return_type>, <name>, <parameter list>)
  58 //
  59 // For example:
  60 //   SANITIZER_INTERFACE_WEAK_DEF(bool, compare, int a, int b) { return a > b; }
  61 //
  62 #if SANITIZER_WINDOWS
  63 #include "sanitizer_win_defs.h"
  64 # define SANITIZER_INTERFACE_WEAK_DEF(ReturnType, Name, ...)                   \
  65   WIN_WEAK_EXPORT_DEF(ReturnType, Name, __VA_ARGS__)
  66 #else
  67 # define SANITIZER_INTERFACE_WEAK_DEF(ReturnType, Name, ...)                   \
  68   extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE            \
  69   ReturnType Name(__VA_ARGS__)
  70 #endif
  71
  72 // SANITIZER_SUPPORTS_WEAK_HOOKS means that we support real weak functions that
  73 // will evaluate to a null pointer when not defined.
  74 #ifndef SANITIZER_SUPPORTS_WEAK_HOOKS
  75 #if (SANITIZER_LINUX || SANITIZER_SOLARIS) && !SANITIZER_GO
  76 # define SANITIZER_SUPPORTS_WEAK_HOOKS 1
  77 // Before Xcode 4.5, the Darwin linker doesn't reliably support undefined
  78 // weak symbols.  Mac OS X 10.9/Darwin 13 is the first release only supported
  79 // by Xcode >= 4.5.
  80 #elif SANITIZER_APPLE && \
  81     __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1090 && !SANITIZER_GO
  82 # define SANITIZER_SUPPORTS_WEAK_HOOKS 1
  83 #else
  84 # define SANITIZER_SUPPORTS_WEAK_HOOKS 0
  85 #endif
  86 #endif // SANITIZER_SUPPORTS_WEAK_HOOKS
  87 // For some weak hooks that will be called very often and we want to avoid the
  88 // overhead of executing the default implementation when it is not necessary,
  89 // we can use the flag SANITIZER_SUPPORTS_WEAK_HOOKS to only define the default
  90 // implementation for platforms that doesn't support weak symbols. For example:
  91 //
  92 //   #if !SANITIZER_SUPPORT_WEAK_HOOKS
  93 //     SANITIZER_INTERFACE_WEAK_DEF(bool, compare_hook, int a, int b) {
  94 //       return a > b;
  95 //     }
  96 //   #endif
  97 //
  98 // And then use it as: if (compare_hook) compare_hook(a, b);
  99 //----------------------------------------------------------------------------//
 100
 101
 102 // We can use .preinit_array section on Linux to call sanitizer initialization
 103 // functions very early in the process startup (unless PIC macro is defined).
 104 //
 105 // On FreeBSD, .preinit_array functions are called with rtld_bind_lock writer
 106 // lock held. It will lead to dead lock if unresolved PLT functions (which helds
 107 // rtld_bind_lock reader lock) are called inside .preinit_array functions.
 108 //
 109 // FIXME: do we have anything like this on Mac?
 110 #ifndef SANITIZER_CAN_USE_PREINIT_ARRAY
 111 #if (SANITIZER_LINUX || SANITIZER_FUCHSIA || SANITIZER_NETBSD) && !defined(PIC)
 112 #define SANITIZER_CAN_USE_PREINIT_ARRAY 1
 113 // Before Solaris 11.4, .preinit_array is fully supported only with GNU ld.
 114 // FIXME: Check for those conditions.
 115 #elif SANITIZER_SOLARIS && !defined(PIC)
 116 # define SANITIZER_CAN_USE_PREINIT_ARRAY 1
 117 #else
 118 # define SANITIZER_CAN_USE_PREINIT_ARRAY 0
 119 #endif
 120 #endif  // SANITIZER_CAN_USE_PREINIT_ARRAY
 121
 122 // GCC does not understand __has_feature
 123 #if !defined(__has_feature)
 124 # define __has_feature(x) 0
 125 #endif
 126
 127 // Older GCCs do not understand __has_attribute.
 128 #if !defined(__has_attribute)
 129 # define __has_attribute(x) 0
 130 #endif
 131
 132 #if !defined(__has_cpp_attribute)
 133 #  define __has_cpp_attribute(x) 0
 134 #endif
 135
 136 // For portability reasons we do not include stddef.h, stdint.h or any other
 137 // system header, but we do need some basic types that are not defined
 138 // in a portable way by the language itself.
 139 namespace __sanitizer {
 140
 141 #if defined(__UINTPTR_TYPE__)
 142 #  if defined(__arm__) && defined(__linux__)
 143 // Linux Arm headers redefine __UINTPTR_TYPE__ and disagree with clang/gcc.
 144 typedef unsigned int uptr;
 145 typedef int sptr;
 146 #  else
 147 typedef __UINTPTR_TYPE__ uptr;
 148 typedef __INTPTR_TYPE__ sptr;
 149 #  endif
 150 #elif defined(_WIN64)
 151 // 64-bit Windows uses LLP64 data model.
 152 typedef unsigned long long uptr;
 153 typedef signed long long sptr;
 154 #elif defined(_WIN32)
 155 typedef unsigned int uptr;
 156 typedef signed int sptr;
 157 #else
 158 #  error Unsupported compiler, missing __UINTPTR_TYPE__
 159 #endif  // defined(__UINTPTR_TYPE__)
 160 #if defined(__x86_64__)
 161 // Since x32 uses ILP32 data model in 64-bit hardware mode, we must use
 162 // 64-bit pointer to unwind stack frame.
 163 typedef unsigned long long uhwptr;
 164 #else
 165 typedef uptr uhwptr;
 166 #endif
 167 typedef unsigned char u8;
 168 typedef unsigned short u16;
 169 typedef unsigned int u32;
 170 typedef unsigned long long u64;
 171 typedef signed char s8;
 172 typedef signed short s16;
 173 typedef signed int s32;
 174 typedef signed long long s64;
 175 #if SANITIZER_WINDOWS
 176 // On Windows, files are HANDLE, which is a synonim of void*.
 177 // Use void* to avoid including <windows.h> everywhere.
 178 typedef void* fd_t;
 179 typedef unsigned error_t;
 180 #else
 181 typedef int fd_t;
 182 typedef int error_t;
 183 #endif
 184 #if SANITIZER_SOLARIS && !defined(_LP64)
 185 typedef long pid_t;
 186 #else
 187 typedef int pid_t;
 188 #endif
 189
 190 #if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_APPLE ||             \
 191     (SANITIZER_SOLARIS && (defined(_LP64) || _FILE_OFFSET_BITS == 64)) || \
 192     (SANITIZER_LINUX && !SANITIZER_GLIBC && !SANITIZER_ANDROID) ||        \
 193     (SANITIZER_LINUX && (defined(__x86_64__) || defined(__hexagon__)))
 194 typedef u64 OFF_T;
 195 #else
 196 typedef uptr OFF_T;
 197 #endif
 198 typedef u64  OFF64_T;
 199
 200 #ifdef __SIZE_TYPE__
 201 typedef __SIZE_TYPE__ usize;
 202 #else
 203 typedef uptr usize;
 204 #endif
 205
 206 typedef u64 tid_t;
 207
 208 // ----------- ATTENTION -------------
 209 // This header should NOT include any other headers to avoid portability issues.
 210
 211 // Common defs.
 212 #define INTERFACE_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
 213 #define SANITIZER_WEAK_DEFAULT_IMPL \
 214   extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE NOINLINE
 215 #define SANITIZER_WEAK_CXX_DEFAULT_IMPL \
 216   extern "C++" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE NOINLINE
 217
 218 // Platform-specific defs.
 219 #if defined(_MSC_VER)
 220 # define ALWAYS_INLINE __forceinline
 221 // FIXME(timurrrr): do we need this on Windows?
 222 # define ALIAS(x)
 223 # define ALIGNED(x) __declspec(align(x))
 224 # define FORMAT(f, a)
 225 # define NOINLINE __declspec(noinline)
 226 # define NORETURN __declspec(noreturn)
 227 # define THREADLOCAL   __declspec(thread)
 228 # define LIKELY(x) (x)
 229 # define UNLIKELY(x) (x)
 230 # define PREFETCH(x) /* _mm_prefetch(x, _MM_HINT_NTA) */ (void)0
 231 # define WARN_UNUSED_RESULT
 232 #else  // _MSC_VER
 233 # define ALWAYS_INLINE inline __attribute__((always_inline))
 234 # define ALIAS(x) __attribute__((alias(SANITIZER_STRINGIFY(x))))
 235 // Please only use the ALIGNED macro before the type.
 236 // Using ALIGNED after the variable declaration is not portable!
 237 # define ALIGNED(x) __attribute__((aligned(x)))
 238 # define FORMAT(f, a)  __attribute__((format(printf, f, a)))
 239 # define NOINLINE __attribute__((noinline))
 240 # define NORETURN  __attribute__((noreturn))
 241 # define THREADLOCAL   __thread
 242 # define LIKELY(x)     __builtin_expect(!!(x), 1)
 243 # define UNLIKELY(x)   __builtin_expect(!!(x), 0)
 244 # if defined(__i386__) || defined(__x86_64__)
 245 // __builtin_prefetch(x) generates prefetchnt0 on x86
 246 #  define PREFETCH(x) __asm__("prefetchnta (%0)" : : "r" (x))
 247 # else
 248 #  define PREFETCH(x) __builtin_prefetch(x)
 249 # endif
 250 # define WARN_UNUSED_RESULT __attribute__((warn_unused_result))
 251 #endif  // _MSC_VER
 252
 253 #if !defined(_MSC_VER) || defined(__clang__)
 254 # define UNUSED __attribute__((unused))
 255 # define USED __attribute__((used))
 256 #else
 257 # define UNUSED
 258 # define USED
 259 #endif
 260
 261 #if !defined(_MSC_VER) || defined(__clang__) || MSC_PREREQ(1900)
 262 # define NOEXCEPT noexcept
 263 #else
 264 # define NOEXCEPT throw()
 265 #endif
 266
 267 #if __has_cpp_attribute(clang::fallthrough)
 268 #  define FALLTHROUGH [[clang::fallthrough]]
 269 #elif __has_cpp_attribute(fallthrough)
 270 #  define FALLTHROUGH [[fallthrough]]
 271 #else
 272 #  define FALLTHROUGH
 273 #endif
 274
 275 #if __has_attribute(uninitialized)
 276 #  define UNINITIALIZED __attribute__((uninitialized))
 277 #else
 278 #  define UNINITIALIZED
 279 #endif
 280
 281 // Unaligned versions of basic types.
 282 typedef ALIGNED(1) u16 uu16;
 283 typedef ALIGNED(1) u32 uu32;
 284 typedef ALIGNED(1) u64 uu64;
 285 typedef ALIGNED(1) s16 us16;
 286 typedef ALIGNED(1) s32 us32;
 287 typedef ALIGNED(1) s64 us64;
 288
 289 #if SANITIZER_WINDOWS
 290 }  // namespace __sanitizer
 291 typedef unsigned long DWORD;
 292 namespace __sanitizer {
 293 typedef DWORD thread_return_t;
 294 # define THREAD_CALLING_CONV __stdcall
 295 #else  // _WIN32
 296 typedef void* thread_return_t;
 297 # define THREAD_CALLING_CONV
 298 #endif  // _WIN32
 299 typedef thread_return_t (THREAD_CALLING_CONV *thread_callback_t)(void* arg);
 300
 301 // NOTE: Functions below must be defined in each run-time.
 302 void NORETURN Die();
 303
 304 void NORETURN CheckFailed(const char *file, int line, const char *cond,
 305                           u64 v1, u64 v2);
 306
 307 // Check macro
 308 #define RAW_CHECK_MSG(expr, msg, ...)          \
 309   do {                                         \
 310     if (UNLIKELY(!(expr))) {                   \
 311       const char* msgs[] = {msg, __VA_ARGS__}; \
 312       for (const char* m : msgs) RawWrite(m);  \
 313       Die();                                   \
 314     }                                          \
 315   } while (0)
 316
 317 #define RAW_CHECK(expr) RAW_CHECK_MSG(expr, #expr "\n", )
 318 #define RAW_CHECK_VA(expr, ...) RAW_CHECK_MSG(expr, #expr "\n", __VA_ARGS__)
 319
 320 #define CHECK_IMPL(c1, op, c2) \
 321   do { \
 322     __sanitizer::u64 v1 = (__sanitizer::u64)(c1); \
 323     __sanitizer::u64 v2 = (__sanitizer::u64)(c2); \
 324     if (UNLIKELY(!(v1 op v2))) \
 325       __sanitizer::CheckFailed(__FILE__, __LINE__, \
 326         "(" #c1 ") " #op " (" #c2 ")", v1, v2); \
 327   } while (false) \
 328 /**/
 329
 330 #define CHECK(a)       CHECK_IMPL((a), !=, 0)
 331 #define CHECK_EQ(a, b) CHECK_IMPL((a), ==, (b))
 332 #define CHECK_NE(a, b) CHECK_IMPL((a), !=, (b))
 333 #define CHECK_LT(a, b) CHECK_IMPL((a), <,  (b))
 334 #define CHECK_LE(a, b) CHECK_IMPL((a), <=, (b))
 335 #define CHECK_GT(a, b) CHECK_IMPL((a), >,  (b))
 336 #define CHECK_GE(a, b) CHECK_IMPL((a), >=, (b))
 337
 338 #if SANITIZER_DEBUG
 339 #define DCHECK(a)       CHECK(a)
 340 #define DCHECK_EQ(a, b) CHECK_EQ(a, b)
 341 #define DCHECK_NE(a, b) CHECK_NE(a, b)
 342 #define DCHECK_LT(a, b) CHECK_LT(a, b)
 343 #define DCHECK_LE(a, b) CHECK_LE(a, b)
 344 #define DCHECK_GT(a, b) CHECK_GT(a, b)
 345 #define DCHECK_GE(a, b) CHECK_GE(a, b)
 346 #else
 347 #define DCHECK(a)
 348 #define DCHECK_EQ(a, b)
 349 #define DCHECK_NE(a, b)
 350 #define DCHECK_LT(a, b)
 351 #define DCHECK_LE(a, b)
 352 #define DCHECK_GT(a, b)
 353 #define DCHECK_GE(a, b)
 354 #endif
 355
 356 #define UNREACHABLE(msg) do { \
 357   CHECK(0 && msg); \
 358   Die(); \
 359 } while (0)
 360
 361 #define UNIMPLEMENTED() UNREACHABLE("unimplemented")
 362
 363 #define COMPILER_CHECK(pred) static_assert(pred, "")
 364
 365 #define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
 366
 367 // Limits for integral types. We have to redefine it in case we don't
 368 // have stdint.h (like in Visual Studio 9).
 369 #undef __INT64_C
 370 #undef __UINT64_C
 371 #if SANITIZER_WORDSIZE == 64
 372 # define __INT64_C(c)  c ## L
 373 # define __UINT64_C(c) c ## UL
 374 #else
 375 # define __INT64_C(c)  c ## LL
 376 # define __UINT64_C(c) c ## ULL
 377 #endif  // SANITIZER_WORDSIZE == 64
 378 #undef INT32_MIN
 379 #define INT32_MIN              (-2147483647-1)
 380 #undef INT32_MAX
 381 #define INT32_MAX              (2147483647)
 382 #undef UINT32_MAX
 383 #define UINT32_MAX             (4294967295U)
 384 #undef INT64_MIN
 385 #define INT64_MIN              (-__INT64_C(9223372036854775807)-1)
 386 #undef INT64_MAX
 387 #define INT64_MAX              (__INT64_C(9223372036854775807))
 388 #undef UINT64_MAX
 389 #define UINT64_MAX             (__UINT64_C(18446744073709551615))
 390 #undef UINTPTR_MAX
 391 #if SANITIZER_WORDSIZE == 64
 392 # define UINTPTR_MAX           (18446744073709551615UL)
 393 #else
 394 # define UINTPTR_MAX           (4294967295U)
 395 #endif  // SANITIZER_WORDSIZE == 64
 396
 397 enum LinkerInitialized { LINKER_INITIALIZED = 0 };
 398
 399 #if !defined(_MSC_VER) || defined(__clang__)
 400 #  define GET_CALLER_PC()                              \
 401     ((__sanitizer::uptr)__builtin_extract_return_addr( \
 402         __builtin_return_address(0)))
 403 #  define GET_CURRENT_FRAME() ((__sanitizer::uptr)__builtin_frame_address(0))
 404 inline void Trap() {
 405   __builtin_trap();
 406 }
 407 #else
 408 extern "C" void* _ReturnAddress(void);
 409 extern "C" void* _AddressOfReturnAddress(void);
 410 # pragma intrinsic(_ReturnAddress)
 411 # pragma intrinsic(_AddressOfReturnAddress)
 412 #  define GET_CALLER_PC() ((__sanitizer::uptr)_ReturnAddress())
 413 // CaptureStackBackTrace doesn't need to know BP on Windows.
 414 #  define GET_CURRENT_FRAME() \
 415     (((__sanitizer::uptr)_AddressOfReturnAddress()) + sizeof(__sanitizer::uptr))
 416
 417 extern "C" void __ud2(void);
 418 #  pragma intrinsic(__ud2)
 419 inline void Trap() {
 420   __ud2();
 421 }
 422 #endif
 423
 424 #define HANDLE_EINTR(res, f)                                       \
 425   {                                                                \
 426     int rverrno;                                                   \
 427     do {                                                           \
 428       res = (f);                                                   \
 429     } while (internal_iserror(res, &rverrno) && rverrno == EINTR); \
 430   }
 431
 432 // Forces the compiler to generate a frame pointer in the function.
 433 #define ENABLE_FRAME_POINTER              \
 434   do {                                    \
 435     volatile __sanitizer::uptr enable_fp; \
 436     enable_fp = GET_CURRENT_FRAME();      \
 437     (void)enable_fp;                      \
 438   } while (0)
 439
 440 // Internal thread identifier allocated by ThreadRegistry.
 441 typedef u32 Tid;
 442 constexpr Tid kInvalidTid = -1;
 443 constexpr Tid kMainTid = 0;
 444
 445 // Stack depot stack identifier.
 446 typedef u32 StackID;
 447 const StackID kInvalidStackID = 0;
 448
 449 }  // namespace __sanitizer
 450
 451 namespace __asan {
 452 using namespace __sanitizer;
 453 }
 454 namespace __dsan {
 455 using namespace __sanitizer;
 456 }
 457 namespace __dfsan {
 458 using namespace __sanitizer;
 459 }
 460 namespace __lsan {
 461 using namespace __sanitizer;
 462 }
 463 namespace __msan {
 464 using namespace __sanitizer;
 465 }
 466 namespace __nsan {
 467 using namespace __sanitizer;
 468 }
 469 namespace __hwasan {
 470 using namespace __sanitizer;
 471 }
 472 namespace __tsan {
 473 using namespace __sanitizer;
 474 }
 475 namespace __scudo {
 476 using namespace __sanitizer;
 477 }
 478 namespace __ubsan {
 479 using namespace __sanitizer;
 480 }
 481 namespace __xray {
 482 using namespace __sanitizer;
 483 }
 484 namespace __interception {
 485 using namespace __sanitizer;
 486 }
 487 namespace __hwasan {
 488 using namespace __sanitizer;
 489 }
 490 namespace __memprof {
 491 using namespace __sanitizer;
 492 }
 493
 494 #endif  // SANITIZER_DEFS_H