1 //===-- sanitizer_libc.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 // run-time libraries. 12 // These tools can not use some of the libc functions directly because those 13 // functions are intercepted. Instead, we implement a tiny subset of libc here. 14 // FIXME: Some of functions declared in this file are in fact POSIX, not libc. 15 //===----------------------------------------------------------------------===// 16 #ifndef SANITIZER_LIBC_H 17 #define SANITIZER_LIBC_H 18 19 // ----------- ATTENTION ------------- 20 // This header should NOT include any other headers from sanitizer runtime. 21 #include "sanitizer_internal_defs.h" 22 23 namespace __sanitizer { 24 25 // internal_X() is a custom implementation of X() for use in RTL. 26 27 // String functions 28 s64 internal_atoll(const char *nptr); 29 void *internal_memchr(const void *s, int c, uptr n); 30 void *internal_memrchr(const void *s, int c, uptr n); 31 int internal_memcmp(const void* s1, const void* s2, uptr n); 32 void *internal_memcpy(void *dest, const void *src, uptr n); 33 void *internal_memmove(void *dest, const void *src, uptr n); 34 // Set [s, s + n) to 0. Both s and n should be 16-aligned. 35 void internal_bzero_aligned16(void *s, uptr n); 36 // Should not be used in performance-critical places. 37 void *internal_memset(void *s, int c, uptr n); 38 char* internal_strchr(const char *s, int c); 39 char *internal_strchrnul(const char *s, int c); 40 int internal_strcmp(const char *s1, const char *s2); 41 uptr internal_strcspn(const char *s, const char *reject); 42 char *internal_strdup(const char *s); 43 char *internal_strndup(const char *s, uptr n); 44 uptr internal_strlen(const char *s); 45 char *internal_strncat(char *dst, const char *src, uptr n); 46 int internal_strncmp(const char *s1, const char *s2, uptr n); 47 char *internal_strncpy(char *dst, const char *src, uptr n); 48 uptr internal_strnlen(const char *s, uptr maxlen); 49 char *internal_strrchr(const char *s, int c); 50 // This is O(N^2), but we are not using it in hot places. 51 char *internal_strstr(const char *haystack, const char *needle); 52 // Works only for base=10 and doesn't set errno. 53 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 54 int internal_snprintf(char *buffer, uptr length, const char *format, ...); 55 56 // Return true if all bytes in [mem, mem+size) are zero. 57 // Optimized for the case when the result is true. 58 bool mem_is_zero(const char *mem, uptr size); 59 60 // I/O 61 const fd_t kInvalidFd = (fd_t)-1; 62 const fd_t kStdinFd = 0; 63 const fd_t kStdoutFd = (fd_t)1; 64 const fd_t kStderrFd = (fd_t)2; 65 66 uptr internal_ftruncate(fd_t fd, uptr size); 67 68 // OS 69 void NORETURN internal__exit(int exitcode); 70 71 uptr internal_getpid(); 72 uptr internal_getppid(); 73 74 // Threading 75 uptr internal_sched_yield(); 76 77 // Error handling 78 bool internal_iserror(uptr retval, int *rverrno = 0); 79 80 } // namespace __sanitizer 81 82 #endif // SANITIZER_LIBC_H 83