1 //===-- sanitizer_libc.h ----------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is shared between AddressSanitizer and ThreadSanitizer 10 // run-time libraries. 11 // These tools can not use some of the libc functions directly because those 12 // functions are intercepted. Instead, we implement a tiny subset of libc here. 13 // FIXME: Some of functions declared in this file are in fact POSIX, not libc. 14 //===----------------------------------------------------------------------===// 15 16 #ifndef SANITIZER_LIBC_H 17 #define SANITIZER_LIBC_H 18 19 // ----------- ATTENTION ------------- 20 // This header should NOT include any other headers from sanitizer runtime. 21 #include "sanitizer_internal_defs.h" 22 23 namespace __sanitizer { 24 25 // internal_X() is a custom implementation of X() for use in RTL. 26 27 // String functions 28 s64 internal_atoll(const char *nptr); 29 void *internal_memchr(const void *s, int c, uptr n); 30 void *internal_memrchr(const void *s, int c, uptr n); 31 int internal_memcmp(const void* s1, const void* s2, uptr n); 32 void *internal_memcpy(void *dest, const void *src, uptr n); 33 void *internal_memmove(void *dest, const void *src, uptr n); 34 // Should not be used in performance-critical places. 35 void *internal_memset(void *s, int c, uptr n); 36 char* internal_strchr(const char *s, int c); 37 char *internal_strchrnul(const char *s, int c); 38 int internal_strcmp(const char *s1, const char *s2); 39 uptr internal_strcspn(const char *s, const char *reject); 40 char *internal_strdup(const char *s); 41 uptr internal_strlen(const char *s); 42 uptr internal_strlcat(char *dst, const char *src, uptr maxlen); 43 char *internal_strncat(char *dst, const char *src, uptr n); 44 int internal_strncmp(const char *s1, const char *s2, uptr n); 45 uptr internal_strlcpy(char *dst, const char *src, uptr maxlen); 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 char *internal_strstr(const char *haystack, const char *needle); 50 // Works only for base=10 and doesn't set errno. 51 s64 internal_simple_strtoll(const char *nptr, const char **endptr, int base); 52 int internal_snprintf(char *buffer, uptr length, const char *format, ...) 53 FORMAT(3, 4); 54 uptr internal_wcslen(const wchar_t *s); 55 uptr internal_wcsnlen(const wchar_t *s, uptr maxlen); 56 57 // Return true if all bytes in [mem, mem+size) are zero. 58 // Optimized for the case when the result is true. 59 bool mem_is_zero(const char *mem, uptr size); 60 61 // I/O 62 // Define these as macros so we can use them in linker initialized global 63 // structs without dynamic initialization. 64 #define kInvalidFd ((fd_t)-1) 65 #define kStdinFd ((fd_t)0) 66 #define kStdoutFd ((fd_t)1) 67 #define kStderrFd ((fd_t)2) 68 69 uptr internal_ftruncate(fd_t fd, uptr size); 70 71 // OS 72 void NORETURN internal__exit(int exitcode); 73 void internal_sleep(unsigned seconds); 74 void internal_usleep(u64 useconds); 75 76 uptr internal_getpid(); 77 uptr internal_getppid(); 78 79 int internal_dlinfo(void *handle, int request, void *p); 80 81 // Threading 82 uptr internal_sched_yield(); 83 84 // Error handling 85 bool internal_iserror(uptr retval, int *rverrno = nullptr); 86 87 } // namespace __sanitizer 88 89 #endif // SANITIZER_LIBC_H 90