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 17 #ifndef SANITIZER_LIBC_H 18 #define SANITIZER_LIBC_H 19 20 // ----------- ATTENTION ------------- 21 // This header should NOT include any other headers from sanitizer runtime. 22 #include "sanitizer_internal_defs.h" 23 24 namespace __sanitizer { 25 26 // internal_X() is a custom implementation of X() for use in RTL. 27 28 // String functions 29 s64 internal_atoll(const char *nptr); 30 void *internal_memchr(const void *s, int c, uptr n); 31 void *internal_memrchr(const void *s, int c, uptr n); 32 int internal_memcmp(const void* s1, const void* s2, uptr n); 33 void *internal_memcpy(void *dest, const void *src, uptr n); 34 void *internal_memmove(void *dest, const void *src, uptr n); 35 // Set [s, s + n) to 0. Both s and n should be 16-aligned. 36 void internal_bzero_aligned16(void *s, uptr n); 37 // Should not be used in performance-critical places. 38 void *internal_memset(void *s, int c, uptr n); 39 char* internal_strchr(const char *s, int c); 40 char *internal_strchrnul(const char *s, int c); 41 int internal_strcmp(const char *s1, const char *s2); 42 uptr internal_strcspn(const char *s, const char *reject); 43 char *internal_strdup(const char *s); 44 char *internal_strndup(const char *s, uptr n); 45 uptr internal_strlen(const char *s); 46 uptr internal_strlcat(char *dst, const char *src, uptr maxlen); 47 char *internal_strncat(char *dst, const char *src, uptr n); 48 int internal_strncmp(const char *s1, const char *s2, uptr n); 49 uptr internal_strlcpy(char *dst, const char *src, uptr maxlen); 50 char *internal_strncpy(char *dst, const char *src, uptr n); 51 uptr internal_strnlen(const char *s, uptr maxlen); 52 char *internal_strrchr(const char *s, int c); 53 // This is O(N^2), but we are not using it in hot places. 54 char *internal_strstr(const char *haystack, const char *needle); 55 // Works only for base=10 and doesn't set errno. 56 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 57 int internal_snprintf(char *buffer, uptr length, const char *format, ...); 58 59 // Return true if all bytes in [mem, mem+size) are zero. 60 // Optimized for the case when the result is true. 61 bool mem_is_zero(const char *mem, uptr size); 62 63 // I/O 64 const fd_t kInvalidFd = (fd_t)-1; 65 const fd_t kStdinFd = 0; 66 const fd_t kStdoutFd = (fd_t)1; 67 const fd_t kStderrFd = (fd_t)2; 68 69 uptr internal_ftruncate(fd_t fd, uptr size); 70 71 // OS 72 void NORETURN internal__exit(int exitcode); 73 74 uptr internal_getpid(); 75 uptr internal_getppid(); 76 77 // Threading 78 uptr internal_sched_yield(); 79 80 // Error handling 81 bool internal_iserror(uptr retval, int *rverrno = nullptr); 82 83 } // namespace __sanitizer 84 85 #endif // SANITIZER_LIBC_H 86