sanitizer_libc.h revision 276789
1238901Sandrew//===-- sanitizer_libc.h ----------------------------------------*- C++ -*-===// 2238901Sandrew// 3238901Sandrew// The LLVM Compiler Infrastructure 4238901Sandrew// 5238901Sandrew// This file is distributed under the University of Illinois Open Source 6238901Sandrew// License. See LICENSE.TXT for details. 7238901Sandrew// 8238901Sandrew//===----------------------------------------------------------------------===// 9238901Sandrew// 10238901Sandrew// This file is shared between AddressSanitizer and ThreadSanitizer 11238901Sandrew// run-time libraries. 12238901Sandrew// These tools can not use some of the libc functions directly because those 13238901Sandrew// functions are intercepted. Instead, we implement a tiny subset of libc here. 14238901Sandrew//===----------------------------------------------------------------------===// 15238901Sandrew#ifndef SANITIZER_LIBC_H 16238901Sandrew#define SANITIZER_LIBC_H 17238901Sandrew 18238901Sandrew// ----------- ATTENTION ------------- 19238901Sandrew// This header should NOT include any other headers from sanitizer runtime. 20251034Sed#include "sanitizer_internal_defs.h" 21238901Sandrew 22238901Sandrewnamespace __sanitizer { 23238901Sandrew 24238901Sandrew// internal_X() is a custom implementation of X() for use in RTL. 25238901Sandrew 26238901Sandrew// String functions 27238901Sandrews64 internal_atoll(const char *nptr); 28238901Sandrewvoid *internal_memchr(const void *s, int c, uptr n); 29238901Sandrewint internal_memcmp(const void* s1, const void* s2, uptr n); 30238901Sandrewvoid *internal_memcpy(void *dest, const void *src, uptr n); 31245614Sandrewvoid *internal_memmove(void *dest, const void *src, uptr n); 32276789Sdim// Set [s, s + n) to 0. Both s and n should be 16-aligned. 33276789Sdimvoid internal_bzero_aligned16(void *s, uptr n); 34238901Sandrew// Should not be used in performance-critical places. 35238901Sandrewvoid *internal_memset(void *s, int c, uptr n); 36238901Sandrewchar* internal_strchr(const char *s, int c); 37274201Sdimchar *internal_strchrnul(const char *s, int c); 38238901Sandrewint internal_strcmp(const char *s1, const char *s2); 39245614Sandrewuptr internal_strcspn(const char *s, const char *reject); 40238901Sandrewchar *internal_strdup(const char *s); 41238901Sandrewuptr internal_strlen(const char *s); 42238901Sandrewchar *internal_strncat(char *dst, const char *src, uptr n); 43238901Sandrewint internal_strncmp(const char *s1, const char *s2, uptr n); 44238901Sandrewchar *internal_strncpy(char *dst, const char *src, uptr n); 45238901Sandrewuptr internal_strnlen(const char *s, uptr maxlen); 46238901Sandrewchar *internal_strrchr(const char *s, int c); 47238901Sandrew// This is O(N^2), but we are not using it in hot places. 48238901Sandrewchar *internal_strstr(const char *haystack, const char *needle); 49238901Sandrew// Works only for base=10 and doesn't set errno. 50238901Sandrews64 internal_simple_strtoll(const char *nptr, char **endptr, int base); 51251034Sedint internal_snprintf(char *buffer, uptr length, const char *format, ...); 52238901Sandrew 53245614Sandrew// Return true if all bytes in [mem, mem+size) are zero. 54245614Sandrew// Optimized for the case when the result is true. 55245614Sandrewbool mem_is_zero(const char *mem, uptr size); 56245614Sandrew 57245614Sandrew 58238901Sandrew// Memory 59251034Seduptr internal_mmap(void *addr, uptr length, int prot, int flags, 60251034Sed int fd, u64 offset); 61251034Seduptr internal_munmap(void *addr, uptr length); 62238901Sandrew 63238901Sandrew// I/O 64238901Sandrewconst fd_t kInvalidFd = -1; 65245614Sandrewconst fd_t kStdinFd = 0; 66245614Sandrewconst fd_t kStdoutFd = 1; 67245614Sandrewconst fd_t kStderrFd = 2; 68251034Seduptr internal_close(fd_t fd); 69245614Sandrewint internal_isatty(fd_t fd); 70251034Sed 71251034Sed// Use __sanitizer::OpenFile() instead. 72251034Seduptr internal_open(const char *filename, int flags); 73251034Seduptr internal_open(const char *filename, int flags, u32 mode); 74251034Sed 75238901Sandrewuptr internal_read(fd_t fd, void *buf, uptr count); 76238901Sandrewuptr internal_write(fd_t fd, const void *buf, uptr count); 77276789Sdimuptr internal_ftruncate(fd_t fd, uptr size); 78251034Sed 79251034Sed// OS 80238901Sandrewuptr internal_filesize(fd_t fd); // -1 on error. 81251034Seduptr internal_stat(const char *path, void *buf); 82251034Seduptr internal_lstat(const char *path, void *buf); 83251034Seduptr internal_fstat(fd_t fd, void *buf); 84251034Seduptr internal_dup2(int oldfd, int newfd); 85245614Sandrewuptr internal_readlink(const char *path, char *buf, uptr bufsize); 86251034Seduptr internal_unlink(const char *path); 87276789Sdimuptr internal_rename(const char *oldpath, const char *newpath); 88251034Sedvoid NORETURN internal__exit(int exitcode); 89251034Seduptr internal_lseek(fd_t fd, OFF_T offset, int whence); 90238901Sandrew 91251034Seduptr internal_ptrace(int request, int pid, void *addr, void *data); 92251034Seduptr internal_waitpid(int pid, int *status, int options); 93251034Seduptr internal_getpid(); 94251034Seduptr internal_getppid(); 95251034Sed 96276789Sdimint internal_fork(); 97276789Sdim 98238901Sandrew// Threading 99251034Seduptr internal_sched_yield(); 100238901Sandrew 101251034Sed// Error handling 102251034Sedbool internal_iserror(uptr retval, int *rverrno = 0); 103251034Sed 104276789Sdimint internal_sigaction(int signum, const void *act, void *oldact); 105276789Sdim 106238901Sandrew} // namespace __sanitizer 107238901Sandrew 108238901Sandrew#endif // SANITIZER_LIBC_H 109