1 //===-- sanitizer_internal_defs.h -------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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
16 #include "sanitizer_platform.h"
18 #ifndef SANITIZER_DEBUG
19 # define SANITIZER_DEBUG 0
22 // Only use SANITIZER_*ATTRIBUTE* before the function return type!
24 # define SANITIZER_INTERFACE_ATTRIBUTE __declspec(dllexport)
25 // FIXME find out what we need on Windows, if anything.
26 # define SANITIZER_WEAK_ATTRIBUTE
27 #elif defined(SANITIZER_GO)
28 # define SANITIZER_INTERFACE_ATTRIBUTE
29 # define SANITIZER_WEAK_ATTRIBUTE
31 # define SANITIZER_INTERFACE_ATTRIBUTE __attribute__((visibility("default")))
32 # define SANITIZER_WEAK_ATTRIBUTE __attribute__((weak))
35 #if (SANITIZER_LINUX || SANITIZER_WINDOWS) && !defined(SANITIZER_GO)
36 # define SANITIZER_SUPPORTS_WEAK_HOOKS 1
38 # define SANITIZER_SUPPORTS_WEAK_HOOKS 0
41 // We can use .preinit_array section on Linux to call sanitizer initialization
42 // functions very early in the process startup (unless PIC macro is defined).
43 // FIXME: do we have anything like this on Mac?
44 #if SANITIZER_LINUX && !SANITIZER_ANDROID && !defined(PIC)
45 # define SANITIZER_CAN_USE_PREINIT_ARRAY 1
47 # define SANITIZER_CAN_USE_PREINIT_ARRAY 0
50 // GCC does not understand __has_feature
51 #if !defined(__has_feature)
52 # define __has_feature(x) 0
55 // For portability reasons we do not include stddef.h, stdint.h or any other
56 // system header, but we do need some basic types that are not defined
57 // in a portable way by the language itself.
58 namespace __sanitizer {
61 // 64-bit Windows uses LLP64 data model.
62 typedef unsigned long long uptr; // NOLINT
63 typedef signed long long sptr; // NOLINT
65 typedef unsigned long uptr; // NOLINT
66 typedef signed long sptr; // NOLINT
67 #endif // defined(_WIN64)
68 #if defined(__x86_64__)
69 // Since x32 uses ILP32 data model in 64-bit hardware mode, we must use
70 // 64-bit pointer to unwind stack frame.
71 typedef unsigned long long uhwptr; // NOLINT
73 typedef uptr uhwptr; // NOLINT
75 typedef unsigned char u8;
76 typedef unsigned short u16; // NOLINT
77 typedef unsigned int u32;
78 typedef unsigned long long u64; // NOLINT
79 typedef signed char s8;
80 typedef signed short s16; // NOLINT
81 typedef signed int s32;
82 typedef signed long long s64; // NOLINT
84 // On Windows, files are HANDLE, which is a synonim of void*.
85 // Use void* to avoid including <windows.h> everywhere.
87 typedef unsigned error_t;
93 // WARNING: OFF_T may be different from OS type off_t, depending on the value of
94 // _FILE_OFFSET_BITS. This definition of OFF_T matches the ABI of system calls
95 // like pread and mmap, as opposed to pread64 and mmap64.
96 // FreeBSD, Mac and Linux/x86-64 are special.
97 #if SANITIZER_FREEBSD || SANITIZER_MAC || \
98 (SANITIZER_LINUX && defined(__x86_64__))
105 #if (SANITIZER_WORDSIZE == 64) || SANITIZER_MAC
106 typedef uptr operator_new_size_type;
108 typedef u32 operator_new_size_type;
110 } // namespace __sanitizer
113 using namespace __sanitizer; // NOLINT
114 // ----------- ATTENTION -------------
115 // This header should NOT include any other headers to avoid portability issues.
118 #define INLINE inline
119 #define INTERFACE_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE
120 #define SANITIZER_WEAK_DEFAULT_IMPL \
121 extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE NOINLINE
122 #define SANITIZER_WEAK_CXX_DEFAULT_IMPL \
123 extern "C++" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE NOINLINE
125 // Platform-specific defs.
126 #if defined(_MSC_VER)
127 # define ALWAYS_INLINE __forceinline
128 // FIXME(timurrrr): do we need this on Windows?
130 # define ALIGNED(x) __declspec(align(x))
131 # define FORMAT(f, a)
132 # define NOINLINE __declspec(noinline)
133 # define NORETURN __declspec(noreturn)
134 # define THREADLOCAL __declspec(thread)
135 # define LIKELY(x) (x)
136 # define UNLIKELY(x) (x)
137 # define PREFETCH(x) /* _mm_prefetch(x, _MM_HINT_NTA) */
139 # define ALWAYS_INLINE inline __attribute__((always_inline))
140 # define ALIAS(x) __attribute__((alias(x)))
141 // Please only use the ALIGNED macro before the type.
142 // Using ALIGNED after the variable declaration is not portable!
143 # define ALIGNED(x) __attribute__((aligned(x)))
144 # define FORMAT(f, a) __attribute__((format(printf, f, a)))
145 # define NOINLINE __attribute__((noinline))
146 # define NORETURN __attribute__((noreturn))
147 # define THREADLOCAL __thread
148 # define LIKELY(x) __builtin_expect(!!(x), 1)
149 # define UNLIKELY(x) __builtin_expect(!!(x), 0)
150 # if defined(__i386__) || defined(__x86_64__)
151 // __builtin_prefetch(x) generates prefetchnt0 on x86
152 # define PREFETCH(x) __asm__("prefetchnta (%0)" : : "r" (x))
154 # define PREFETCH(x) __builtin_prefetch(x)
158 #if !defined(_MSC_VER) || defined(__clang__)
159 # define UNUSED __attribute__((unused))
160 # define USED __attribute__((used))
166 #if !defined(_MSC_VER) || defined(__clang__) || MSC_PREREQ(1900)
167 # define NOEXCEPT noexcept
169 # define NOEXCEPT throw()
172 // Unaligned versions of basic types.
173 typedef ALIGNED(1) u16 uu16;
174 typedef ALIGNED(1) u32 uu32;
175 typedef ALIGNED(1) u64 uu64;
176 typedef ALIGNED(1) s16 us16;
177 typedef ALIGNED(1) s32 us32;
178 typedef ALIGNED(1) s64 us64;
180 #if SANITIZER_WINDOWS
181 typedef unsigned long DWORD; // NOLINT
182 typedef DWORD thread_return_t;
183 # define THREAD_CALLING_CONV __stdcall
185 typedef void* thread_return_t;
186 # define THREAD_CALLING_CONV
188 typedef thread_return_t (THREAD_CALLING_CONV *thread_callback_t)(void* arg);
190 // NOTE: Functions below must be defined in each run-time.
191 namespace __sanitizer {
194 // FIXME: No, this shouldn't be in the sanitizer interface.
195 SANITIZER_INTERFACE_ATTRIBUTE
196 void NORETURN CheckFailed(const char *file, int line, const char *cond,
198 } // namespace __sanitizer
201 #define RAW_CHECK_MSG(expr, msg) do { \
202 if (UNLIKELY(!(expr))) { \
208 #define RAW_CHECK(expr) RAW_CHECK_MSG(expr, #expr)
210 #define CHECK_IMPL(c1, op, c2) \
212 __sanitizer::u64 v1 = (u64)(c1); \
213 __sanitizer::u64 v2 = (u64)(c2); \
214 if (UNLIKELY(!(v1 op v2))) \
215 __sanitizer::CheckFailed(__FILE__, __LINE__, \
216 "(" #c1 ") " #op " (" #c2 ")", v1, v2); \
220 #define CHECK(a) CHECK_IMPL((a), !=, 0)
221 #define CHECK_EQ(a, b) CHECK_IMPL((a), ==, (b))
222 #define CHECK_NE(a, b) CHECK_IMPL((a), !=, (b))
223 #define CHECK_LT(a, b) CHECK_IMPL((a), <, (b))
224 #define CHECK_LE(a, b) CHECK_IMPL((a), <=, (b))
225 #define CHECK_GT(a, b) CHECK_IMPL((a), >, (b))
226 #define CHECK_GE(a, b) CHECK_IMPL((a), >=, (b))
229 #define DCHECK(a) CHECK(a)
230 #define DCHECK_EQ(a, b) CHECK_EQ(a, b)
231 #define DCHECK_NE(a, b) CHECK_NE(a, b)
232 #define DCHECK_LT(a, b) CHECK_LT(a, b)
233 #define DCHECK_LE(a, b) CHECK_LE(a, b)
234 #define DCHECK_GT(a, b) CHECK_GT(a, b)
235 #define DCHECK_GE(a, b) CHECK_GE(a, b)
238 #define DCHECK_EQ(a, b)
239 #define DCHECK_NE(a, b)
240 #define DCHECK_LT(a, b)
241 #define DCHECK_LE(a, b)
242 #define DCHECK_GT(a, b)
243 #define DCHECK_GE(a, b)
246 #define UNREACHABLE(msg) do { \
251 #define UNIMPLEMENTED() UNREACHABLE("unimplemented")
253 #define COMPILER_CHECK(pred) IMPL_COMPILER_ASSERT(pred, __LINE__)
255 #define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
257 #define IMPL_PASTE(a, b) a##b
258 #define IMPL_COMPILER_ASSERT(pred, line) \
259 typedef char IMPL_PASTE(assertion_failed_##_, line)[2*(int)(pred)-1]
261 // Limits for integral types. We have to redefine it in case we don't
262 // have stdint.h (like in Visual Studio 9).
265 #if SANITIZER_WORDSIZE == 64
266 # define __INT64_C(c) c ## L
267 # define __UINT64_C(c) c ## UL
269 # define __INT64_C(c) c ## LL
270 # define __UINT64_C(c) c ## ULL
271 #endif // SANITIZER_WORDSIZE == 64
273 #define INT32_MIN (-2147483647-1)
275 #define INT32_MAX (2147483647)
277 #define UINT32_MAX (4294967295U)
279 #define INT64_MIN (-__INT64_C(9223372036854775807)-1)
281 #define INT64_MAX (__INT64_C(9223372036854775807))
283 #define UINT64_MAX (__UINT64_C(18446744073709551615))
285 enum LinkerInitialized { LINKER_INITIALIZED = 0 };
287 #if !defined(_MSC_VER) || defined(__clang__)
288 # define GET_CALLER_PC() (uptr)__builtin_return_address(0)
289 # define GET_CURRENT_FRAME() (uptr)__builtin_frame_address(0)
291 extern "C" void* _ReturnAddress(void);
292 # pragma intrinsic(_ReturnAddress)
293 # define GET_CALLER_PC() (uptr)_ReturnAddress()
294 // CaptureStackBackTrace doesn't need to know BP on Windows.
295 // FIXME: This macro is still used when printing error reports though it's not
296 // clear if the BP value is needed in the ASan reports on Windows.
297 # define GET_CURRENT_FRAME() (uptr)0xDEADBEEF
300 #define HANDLE_EINTR(res, f) \
305 } while (internal_iserror(res, &rverrno) && rverrno == EINTR); \
308 // Forces the compiler to generate a frame pointer in the function.
309 #define ENABLE_FRAME_POINTER \
311 volatile uptr enable_fp; \
312 enable_fp = GET_CURRENT_FRAME(); \
316 #endif // SANITIZER_DEFS_H