1 //===-- sanitizer_libc.h ----------------------------------------*- C++ -*-===// 2 // 3 // This file is distributed under the University of Illinois Open Source 4 // License. See LICENSE.TXT for details. 5 // 6 //===----------------------------------------------------------------------===// 7 // 8 // This file is shared between AddressSanitizer and ThreadSanitizer 9 // run-time libraries. 10 // These tools can not use some of the libc functions directly because those 11 // functions are intercepted. Instead, we implement a tiny subset of libc here. 12 // FIXME: Some of functions declared in this file are in fact POSIX, not libc. 13 //===----------------------------------------------------------------------===// 14 15 #ifndef SANITIZER_LIBC_H 16 #define SANITIZER_LIBC_H 17 18 // ----------- ATTENTION ------------- 19 // This header should NOT include any other headers from sanitizer runtime. 20 #include "sanitizer_internal_defs.h" 21 22 namespace __sanitizer { 23 24 // internal_X() is a custom implementation of X() for use in RTL. 25 26 // String functions 27 s64 internal_atoll(const char *nptr); 28 void *internal_memchr(const void *s, int c, uptr n); 29 void *internal_memrchr(const void *s, int c, uptr n); 30 int internal_memcmp(const void* s1, const void* s2, uptr n); 31 void *internal_memcpy(void *dest, const void *src, uptr n); 32 void *internal_memmove(void *dest, const void *src, uptr n); 33 // Set [s, s + n) to 0. Both s and n should be 16-aligned. 34 void internal_bzero_aligned16(void *s, uptr n); 35 // Should not be used in performance-critical places. 36 void *internal_memset(void *s, int c, uptr n); 37 char* internal_strchr(const char *s, int c); 38 char *internal_strchrnul(const char *s, int c); 39 int internal_strcmp(const char *s1, const char *s2); 40 uptr internal_strcspn(const char *s, const char *reject); 41 char *internal_strdup(const char *s); 42 char *internal_strndup(const char *s, uptr n); 43 uptr internal_strlen(const char *s); 44 uptr internal_strlcat(char *dst, const char *src, uptr maxlen); 45 char *internal_strncat(char *dst, const char *src, uptr n); 46 int internal_strncmp(const char *s1, const char *s2, uptr n); 47 uptr internal_strlcpy(char *dst, const char *src, uptr maxlen); 48 char *internal_strncpy(char *dst, const char *src, uptr n); 49 uptr internal_strnlen(const char *s, uptr maxlen); 50 char *internal_strrchr(const char *s, int c); 51 // This is O(N^2), but we are not using it in hot places. 52 uptr internal_wcslen(const wchar_t *s); 53 char *internal_strstr(const char *haystack, const char *needle); 54 // Works only for base=10 and doesn't set errno. 55 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 56 int internal_snprintf(char *buffer, uptr length, const char *format, ...); 57 58 // Return true if all bytes in [mem, mem+size) are zero. 59 // Optimized for the case when the result is true. 60 bool mem_is_zero(const char *mem, uptr size); 61 62 // I/O 63 // Define these as macros so we can use them in linker initialized global 64 // structs without dynamic initialization. 65 #define kInvalidFd ((fd_t)-1) 66 #define kStdinFd ((fd_t)0) 67 #define kStdoutFd ((fd_t)1) 68 #define kStderrFd ((fd_t)2) 69 70 uptr internal_ftruncate(fd_t fd, uptr size); 71 72 // OS 73 void NORETURN internal__exit(int exitcode); 74 unsigned int internal_sleep(unsigned int seconds); 75 76 uptr internal_getpid(); 77 uptr internal_getppid(); 78 79 // Threading 80 uptr internal_sched_yield(); 81 82 // Error handling 83 bool internal_iserror(uptr retval, int *rverrno = nullptr); 84 85 } // namespace __sanitizer 86 87 #endif // SANITIZER_LIBC_H 88