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// FIXME: Some of functions declared in this file are in fact POSIX, not libc. 15//===----------------------------------------------------------------------===// 16 17#ifndef SANITIZER_LIBC_H 18#define SANITIZER_LIBC_H 19 20// ----------- ATTENTION ------------- 21// This header should NOT include any other headers from sanitizer runtime. 22#include "sanitizer_internal_defs.h" 23 24namespace __sanitizer { 25 26// internal_X() is a custom implementation of X() for use in RTL. 27 28// String functions 29s64 internal_atoll(const char *nptr); 30void *internal_memchr(const void *s, int c, uptr n); 31void *internal_memrchr(const void *s, int c, uptr n); 32int internal_memcmp(const void* s1, const void* s2, uptr n); 33void *internal_memcpy(void *dest, const void *src, uptr n); 34void *internal_memmove(void *dest, const void *src, uptr n); 35// Should not be used in performance-critical places. 36void *internal_memset(void *s, int c, uptr n); 37char* internal_strchr(const char *s, int c); 38char *internal_strchrnul(const char *s, int c); 39int internal_strcmp(const char *s1, const char *s2); 40uptr internal_strcspn(const char *s, const char *reject); 41char *internal_strdup(const char *s); 42uptr internal_strlen(const char *s); 43uptr internal_strlcat(char *dst, const char *src, uptr maxlen); 44char *internal_strncat(char *dst, const char *src, uptr n); 45int internal_strncmp(const char *s1, const char *s2, uptr n); 46uptr internal_strlcpy(char *dst, const char *src, uptr maxlen); 47char *internal_strncpy(char *dst, const char *src, uptr n); 48uptr internal_strnlen(const char *s, uptr maxlen); 49char *internal_strrchr(const char *s, int c); 50char *internal_strstr(const char *haystack, const char *needle); 51// Works only for base=10 and doesn't set errno. 52s64 internal_simple_strtoll(const char *nptr, const char **endptr, int base); 53int 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. 57bool mem_is_zero(const char *mem, uptr size); 58 59// I/O 60// Define these as macros so we can use them in linker initialized global 61// structs without dynamic initialization. 62#define kInvalidFd ((fd_t)-1) 63#define kStdinFd ((fd_t)0) 64#define kStdoutFd ((fd_t)1) 65#define kStderrFd ((fd_t)2) 66 67uptr internal_ftruncate(fd_t fd, uptr size); 68 69// OS 70void NORETURN internal__exit(int exitcode); 71unsigned int internal_sleep(unsigned int seconds); 72 73uptr internal_getpid(); 74uptr internal_getppid(); 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