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 //===----------------------------------------------------------------------===// 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 int internal_memcmp(const void* s1, const void* s2, uptr n); 30 void *internal_memcpy(void *dest, const void *src, uptr n); 31 void *internal_memmove(void *dest, const void *src, uptr n); 32 // Should not be used in performance-critical places. 33 void *internal_memset(void *s, int c, uptr n); 34 char* internal_strchr(const char *s, int c); 35 int internal_strcmp(const char *s1, const char *s2); 36 uptr internal_strcspn(const char *s, const char *reject); 37 char *internal_strdup(const char *s); 38 uptr internal_strlen(const char *s); 39 char *internal_strncat(char *dst, const char *src, uptr n); 40 int internal_strncmp(const char *s1, const char *s2, uptr n); 41 char *internal_strncpy(char *dst, const char *src, uptr n); 42 uptr internal_strnlen(const char *s, uptr maxlen); 43 char *internal_strrchr(const char *s, int c); 44 // This is O(N^2), but we are not using it in hot places. 45 char *internal_strstr(const char *haystack, const char *needle); 46 // Works only for base=10 and doesn't set errno. 47 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 48 int internal_snprintf(char *buffer, uptr length, const char *format, ...); 49 50 // Return true if all bytes in [mem, mem+size) are zero. 51 // Optimized for the case when the result is true. 52 bool mem_is_zero(const char *mem, uptr size); 53 54 55 // Memory 56 uptr internal_mmap(void *addr, uptr length, int prot, int flags, 57 int fd, u64 offset); 58 uptr internal_munmap(void *addr, uptr length); 59 60 // I/O 61 const fd_t kInvalidFd = -1; 62 const fd_t kStdinFd = 0; 63 const fd_t kStdoutFd = 1; 64 const fd_t kStderrFd = 2; 65 uptr internal_close(fd_t fd); 66 int internal_isatty(fd_t fd); 67 68 // Use __sanitizer::OpenFile() instead. 69 uptr internal_open(const char *filename, int flags); 70 uptr internal_open(const char *filename, int flags, u32 mode); 71 72 uptr internal_read(fd_t fd, void *buf, uptr count); 73 uptr internal_write(fd_t fd, const void *buf, uptr count); 74 75 // OS 76 uptr internal_filesize(fd_t fd); // -1 on error. 77 uptr internal_stat(const char *path, void *buf); 78 uptr internal_lstat(const char *path, void *buf); 79 uptr internal_fstat(fd_t fd, void *buf); 80 uptr internal_dup2(int oldfd, int newfd); 81 uptr internal_readlink(const char *path, char *buf, uptr bufsize); 82 uptr internal_unlink(const char *path); 83 void NORETURN internal__exit(int exitcode); 84 uptr internal_lseek(fd_t fd, OFF_T offset, int whence); 85 86 uptr internal_ptrace(int request, int pid, void *addr, void *data); 87 uptr internal_waitpid(int pid, int *status, int options); 88 uptr internal_getpid(); 89 uptr internal_getppid(); 90 91 // Threading 92 uptr internal_sched_yield(); 93 94 // Error handling 95 bool internal_iserror(uptr retval, int *rverrno = 0); 96 97 } // namespace __sanitizer 98 99 #endif // SANITIZER_LIBC_H 100