lib/sanitizer_common/sanitizer_libc.h

   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
  49 // Return true if all bytes in [mem, mem+size) are zero.
  50 // Optimized for the case when the result is true.
  51 bool mem_is_zero(const char *mem, uptr size);
  52
  53
  54 // Memory
  55 void *internal_mmap(void *addr, uptr length, int prot, int flags,
  56                     int fd, u64 offset);
  57 int internal_munmap(void *addr, uptr length);
  58
  59 // I/O
  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
  67 // Use __sanitizer::OpenFile() instead.
  68 fd_t internal_open(const char *filename, int flags);
  69 fd_t internal_open(const char *filename, int flags, u32 mode);
  70
  71 uptr internal_read(fd_t fd, void *buf, uptr count);
  72 uptr internal_write(fd_t fd, const void *buf, uptr count);
  73 uptr internal_filesize(fd_t fd);  // -1 on error.
  74 int internal_stat(const char *path, void *buf);
  75 int internal_lstat(const char *path, void *buf);
  76 int internal_fstat(fd_t fd, void *buf);
  77
  78 int internal_dup2(int oldfd, int newfd);
  79 uptr internal_readlink(const char *path, char *buf, uptr bufsize);
  80 int internal_snprintf(char *buffer, uptr length, const char *format, ...);
  81
  82 // Threading
  83 int internal_sched_yield();
  84
  85 }  // namespace __sanitizer
  86
  87 #endif  // SANITIZER_LIBC_H