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 22namespace __sanitizer { 23 24// internal_X() is a custom implementation of X() for use in RTL. 25 26// String functions 27s64 internal_atoll(const char *nptr); 28void *internal_memchr(const void *s, int c, uptr n); 29void *internal_memrchr(const void *s, int c, uptr n); 30int internal_memcmp(const void* s1, const void* s2, uptr n); 31void *internal_memcpy(void *dest, const void *src, uptr n); 32void *internal_memmove(void *dest, const void *src, uptr n); 33// Should not be used in performance-critical places. 34void *internal_memset(void *s, int c, uptr n); 35char* internal_strchr(const char *s, int c); 36char *internal_strchrnul(const char *s, int c); 37int internal_strcmp(const char *s1, const char *s2); 38uptr internal_strcspn(const char *s, const char *reject); 39char *internal_strdup(const char *s); 40uptr internal_strlen(const char *s); 41uptr internal_strlcat(char *dst, const char *src, uptr maxlen); 42char *internal_strncat(char *dst, const char *src, uptr n); 43int internal_strncmp(const char *s1, const char *s2, uptr n); 44uptr internal_strlcpy(char *dst, const char *src, uptr maxlen); 45char *internal_strncpy(char *dst, const char *src, uptr n); 46uptr internal_strnlen(const char *s, uptr maxlen); 47char *internal_strrchr(const char *s, int c); 48char *internal_strstr(const char *haystack, const char *needle); 49// Works only for base=10 and doesn't set errno. 50s64 internal_simple_strtoll(const char *nptr, const char **endptr, int base); 51int internal_snprintf(char *buffer, uptr length, const char *format, ...); 52 53// Return true if all bytes in [mem, mem+size) are zero. 54// Optimized for the case when the result is true. 55bool mem_is_zero(const char *mem, uptr size); 56 57// I/O 58// Define these as macros so we can use them in linker initialized global 59// structs without dynamic initialization. 60#define kInvalidFd ((fd_t)-1) 61#define kStdinFd ((fd_t)0) 62#define kStdoutFd ((fd_t)1) 63#define kStderrFd ((fd_t)2) 64 65uptr internal_ftruncate(fd_t fd, uptr size); 66 67// OS 68void NORETURN internal__exit(int exitcode); 69unsigned int internal_sleep(unsigned int seconds); 70 71uptr internal_getpid(); 72uptr internal_getppid(); 73 74int internal_dlinfo(void *handle, int request, void *p); 75 76// Threading 77uptr internal_sched_yield(); 78 79// Error handling 80bool internal_iserror(uptr retval, int *rverrno = nullptr); 81 82} // namespace __sanitizer 83 84#endif // SANITIZER_LIBC_H 85