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 //===----------------------------------------------------------------------===//
  13 #ifndef SANITIZER_LIBC_H
  14 #define SANITIZER_LIBC_H
  15
  16 // ----------- ATTENTION -------------
  17 // This header should NOT include any other headers from sanitizer runtime.
  18 #include "sanitizer_internal_defs.h"
  19
  20 namespace __sanitizer {
  21
  22 // internal_X() is a custom implementation of X() for use in RTL.
  23
  24 // String functions
  25 s64 internal_atoll(const char *nptr);
  26 void *internal_memchr(const void *s, int c, uptr n);
  27 int internal_memcmp(const void* s1, const void* s2, uptr n);
  28 void *internal_memcpy(void *dest, const void *src, uptr n);
  29 void *internal_memmove(void *dest, const void *src, uptr n);
  30 // Set [s, s + n) to 0. Both s and n should be 16-aligned.
  31 void internal_bzero_aligned16(void *s, 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 char *internal_strchrnul(const char *s, int c);
  36 int internal_strcmp(const char *s1, const char *s2);
  37 uptr internal_strcspn(const char *s, const char *reject);
  38 char *internal_strdup(const char *s);
  39 uptr internal_strlen(const char *s);
  40 char *internal_strncat(char *dst, const char *src, uptr n);
  41 int internal_strncmp(const char *s1, const char *s2, uptr n);
  42 char *internal_strncpy(char *dst, const char *src, uptr n);
  43 uptr internal_strnlen(const char *s, uptr maxlen);
  44 char *internal_strrchr(const char *s, int c);
  45 // This is O(N^2), but we are not using it in hot places.
  46 char *internal_strstr(const char *haystack, const char *needle);
  47 // Works only for base=10 and doesn't set errno.
  48 s64 internal_simple_strtoll(const char *nptr, char **endptr, int base);
  49 int internal_snprintf(char *buffer, uptr length, const char *format, ...);
  50
  51 // Return true if all bytes in [mem, mem+size) are zero.
  52 // Optimized for the case when the result is true.
  53 bool mem_is_zero(const char *mem, uptr size);
  54
  55
  56 // Memory
  57 uptr internal_mmap(void *addr, uptr length, int prot, int flags,
  58                    int fd, u64 offset);
  59 uptr internal_munmap(void *addr, uptr length);
  60
  61 // I/O
  62 const fd_t kInvalidFd = -1;
  63 const fd_t kStdinFd = 0;
  64 const fd_t kStdoutFd = 1;
  65 const fd_t kStderrFd = 2;
  66 uptr internal_close(fd_t fd);
  67 int internal_isatty(fd_t fd);
  68
  69 // Use __sanitizer::OpenFile() instead.
  70 uptr internal_open(const char *filename, int flags);
  71 uptr internal_open(const char *filename, int flags, u32 mode);
  72
  73 uptr internal_read(fd_t fd, void *buf, uptr count);
  74 uptr internal_write(fd_t fd, const void *buf, uptr count);
  75 uptr internal_ftruncate(fd_t fd, uptr size);
  76
  77 // OS
  78 uptr internal_filesize(fd_t fd);  // -1 on error.
  79 uptr internal_stat(const char *path, void *buf);
  80 uptr internal_lstat(const char *path, void *buf);
  81 uptr internal_fstat(fd_t fd, void *buf);
  82 uptr internal_dup2(int oldfd, int newfd);
  83 uptr internal_readlink(const char *path, char *buf, uptr bufsize);
  84 uptr internal_unlink(const char *path);
  85 uptr internal_rename(const char *oldpath, const char *newpath);
  86 void NORETURN internal__exit(int exitcode);
  87 uptr internal_lseek(fd_t fd, OFF_T offset, int whence);
  88
  89 uptr internal_ptrace(int request, int pid, void *addr, void *data);
  90 uptr internal_waitpid(int pid, int *status, int options);
  91 uptr internal_getpid();
  92 uptr internal_getppid();
  93
  94 int internal_fork();
  95
  96 // Threading
  97 uptr internal_sched_yield();
  98
  99 // Error handling
 100 bool internal_iserror(uptr retval, int *rverrno = 0);
 101
 102 int internal_sigaction(int signum, const void *act, void *oldact);
 103
 104 }  // namespace __sanitizer
 105
 106 #endif  // SANITIZER_LIBC_H