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 //===----------------------------------------------------------------------===// 13 #ifndef SANITIZER_LIBC_H 14 #define SANITIZER_LIBC_H 15 16 // ----------- ATTENTION ------------- 17 // This header should NOT include any other headers from sanitizer runtime. 18 #include "sanitizer_internal_defs.h" 19 20 namespace __sanitizer { 21 22 // internal_X() is a custom implementation of X() for use in RTL. 23 24 // String functions 25 s64 internal_atoll(const char *nptr); 26 void *internal_memchr(const void *s, int c, uptr n); 27 int internal_memcmp(const void* s1, const void* s2, uptr n); 28 void *internal_memcpy(void *dest, const void *src, uptr n); 29 void *internal_memmove(void *dest, const void *src, uptr n); 30 // Should not be used in performance-critical places. 31 void *internal_memset(void *s, int c, uptr n); 32 char* internal_strchr(const char *s, int c); 33 int internal_strcmp(const char *s1, const char *s2); 34 uptr internal_strcspn(const char *s, const char *reject); 35 char *internal_strdup(const char *s); 36 uptr internal_strlen(const char *s); 37 char *internal_strncat(char *dst, const char *src, uptr n); 38 int internal_strncmp(const char *s1, const char *s2, uptr n); 39 char *internal_strncpy(char *dst, const char *src, uptr n); 40 uptr internal_strnlen(const char *s, uptr maxlen); 41 char *internal_strrchr(const char *s, int c); 42 // This is O(N^2), but we are not using it in hot places. 43 char *internal_strstr(const char *haystack, const char *needle); 44 // Works only for base=10 and doesn't set errno. 45 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 46 int internal_snprintf(char *buffer, uptr length, const char *format, ...); 47 48 // Return true if all bytes in [mem, mem+size) are zero. 49 // Optimized for the case when the result is true. 50 bool mem_is_zero(const char *mem, uptr size); 51 52 53 // Memory 54 void *internal_mmap(void *addr, uptr length, int prot, int flags, 55 int fd, u64 offset); 56 int internal_munmap(void *addr, uptr length); 57 58 // I/O 59 const fd_t kInvalidFd = -1; 60 const fd_t kStdinFd = 0; 61 const fd_t kStdoutFd = 1; 62 const fd_t kStderrFd = 2; 63 int internal_close(fd_t fd); 64 int internal_isatty(fd_t fd); 65 66 // Use __sanitizer::OpenFile() instead. 67 fd_t internal_open(const char *filename, int flags); 68 fd_t internal_open(const char *filename, int flags, u32 mode); 69 70 uptr internal_read(fd_t fd, void *buf, uptr count); 71 uptr internal_write(fd_t fd, const void *buf, uptr count); 72 73 // OS 74 uptr internal_filesize(fd_t fd); // -1 on error. 75 int internal_stat(const char *path, void *buf); 76 int internal_lstat(const char *path, void *buf); 77 int internal_fstat(fd_t fd, void *buf); 78 int internal_dup2(int oldfd, int newfd); 79 uptr internal_readlink(const char *path, char *buf, uptr bufsize); 80 void NORETURN internal__exit(int exitcode); 81 82 // Threading 83 int internal_sched_yield(); 84 85 } // namespace __sanitizer 86 87 #endif // SANITIZER_LIBC_H 88