libsanitizer/sanitizer_common/sanitizer_libc.h

   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 // NOTE: This file may be included into user code.
  13 //===----------------------------------------------------------------------===//
  14 #ifndef SANITIZER_LIBC_H
  15 #define SANITIZER_LIBC_H
  16
  17 // ----------- ATTENTION -------------
  18 // This header should NOT include any other headers from sanitizer runtime.
  19 #include "sanitizer/common_interface_defs.h"
  20
  21 namespace __sanitizer {
  22
  23 // internal_X() is a custom implementation of X() for use in RTL.
  24
  25 // String functions
  26 s64 internal_atoll(const char *nptr);
  27 void *internal_memchr(const void *s, int c, uptr n);
  28 int internal_memcmp(const void* s1, const void* s2, uptr n);
  29 void *internal_memcpy(void *dest, const void *src, uptr n);
  30 void *internal_memmove(void *dest, const void *src, uptr n);
  31 // Should not be used in performance-critical places.
  32 void *internal_memset(void *s, int c, uptr n);
  33 char* internal_strchr(const char *s, int c);
  34 int internal_strcmp(const char *s1, const char *s2);
  35 uptr internal_strcspn(const char *s, const char *reject);
  36 char *internal_strdup(const char *s);
  37 uptr internal_strlen(const char *s);
  38 char *internal_strncat(char *dst, const char *src, uptr n);
  39 int internal_strncmp(const char *s1, const char *s2, uptr n);
  40 char *internal_strncpy(char *dst, const char *src, uptr n);
  41 uptr internal_strnlen(const char *s, uptr maxlen);
  42 char *internal_strrchr(const char *s, int c);
  43 // This is O(N^2), but we are not using it in hot places.
  44 char *internal_strstr(const char *haystack, const char *needle);
  45 // Works only for base=10 and doesn't set errno.
  46 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base);
  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 typedef int fd_t;
  60 const fd_t kInvalidFd = -1;
  61 const fd_t kStdinFd = 0;
  62 const fd_t kStdoutFd = 1;
  63 const fd_t kStderrFd = 2;
  64 int internal_close(fd_t fd);
  65 int internal_isatty(fd_t fd);
  66 fd_t internal_open(const char *filename, bool write);
  67 uptr internal_read(fd_t fd, void *buf, uptr count);
  68 uptr internal_write(fd_t fd, const void *buf, uptr count);
  69 uptr internal_filesize(fd_t fd);  // -1 on error.
  70 int internal_dup2(int oldfd, int newfd);
  71 uptr internal_readlink(const char *path, char *buf, uptr bufsize);
  72 int internal_snprintf(char *buffer, uptr length, const char *format, ...);
  73
  74 // Threading
  75 int internal_sched_yield();
  76
  77 }  // namespace __sanitizer
  78
  79 #endif  // SANITIZER_LIBC_H