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 // 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 char *internal_strncat(char *dst, const char *src, uptr n);
  45 int internal_strncmp(const char *s1, const char *s2, uptr n);
  46 char *internal_strncpy(char *dst, const char *src, uptr n);
  47 uptr internal_strnlen(const char *s, uptr maxlen);
  48 char *internal_strrchr(const char *s, int c);
  49 // This is O(N^2), but we are not using it in hot places.
  50 char *internal_strstr(const char *haystack, const char *needle);
  51 // Works only for base=10 and doesn't set errno.
  52 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base);
  53 int internal_snprintf(char *buffer, uptr length, const char *format, ...);
  54
  55 // Return true if all bytes in [mem, mem+size) are zero.
  56 // Optimized for the case when the result is true.
  57 bool mem_is_zero(const char *mem, uptr size);
  58
  59 // I/O
  60 const fd_t kInvalidFd = (fd_t)-1;
  61 const fd_t kStdinFd = 0;
  62 const fd_t kStdoutFd = (fd_t)1;
  63 const fd_t kStderrFd = (fd_t)2;
  64
  65 uptr internal_ftruncate(fd_t fd, uptr size);
  66
  67 // OS
  68 void NORETURN internal__exit(int exitcode);
  69
  70 uptr internal_getpid();
  71 uptr internal_getppid();
  72
  73 // Threading
  74 uptr internal_sched_yield();
  75
  76 // Error handling
  77 bool internal_iserror(uptr retval, int *rverrno = nullptr);
  78
  79 } // namespace __sanitizer
  80
  81 #endif // SANITIZER_LIBC_H