//===-- sanitizer_libc.h ----------------------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file is shared between AddressSanitizer and ThreadSanitizer // run-time libraries. // These tools can not use some of the libc functions directly because those // functions are intercepted. Instead, we implement a tiny subset of libc here. // FIXME: Some of functions declared in this file are in fact POSIX, not libc. //===----------------------------------------------------------------------===// #ifndef SANITIZER_LIBC_H #define SANITIZER_LIBC_H // ----------- ATTENTION ------------- // This header should NOT include any other headers from sanitizer runtime. #include "sanitizer_internal_defs.h" namespace __sanitizer { // internal_X() is a custom implementation of X() for use in RTL. extern "C" { // These are used as builtin replacements; see sanitizer_redefine_builtins.h. // In normal runtime code, use the __sanitizer::internal_X() aliases instead. SANITIZER_INTERFACE_ATTRIBUTE void *__sanitizer_internal_memcpy(void *dest, const void *src, uptr n); SANITIZER_INTERFACE_ATTRIBUTE void *__sanitizer_internal_memmove( void *dest, const void *src, uptr n); SANITIZER_INTERFACE_ATTRIBUTE void *__sanitizer_internal_memset(void *s, int c, uptr n); } // extern "C" // String functions s64 internal_atoll(const char *nptr); void *internal_memchr(const void *s, int c, uptr n); void *internal_memrchr(const void *s, int c, uptr n); int internal_memcmp(const void* s1, const void* s2, uptr n); ALWAYS_INLINE void *internal_memcpy(void *dest, const void *src, uptr n) { … } ALWAYS_INLINE void *internal_memmove(void *dest, const void *src, uptr n) { … } // Should not be used in performance-critical places. ALWAYS_INLINE void *internal_memset(void *s, int c, uptr n) { … } char* internal_strchr(const char *s, int c); char *internal_strchrnul(const char *s, int c); int internal_strcmp(const char *s1, const char *s2); uptr internal_strcspn(const char *s, const char *reject); char *internal_strdup(const char *s); uptr internal_strlen(const char *s); uptr internal_strlcat(char *dst, const char *src, uptr maxlen); char *internal_strncat(char *dst, const char *src, uptr n); int internal_strncmp(const char *s1, const char *s2, uptr n); uptr internal_strlcpy(char *dst, const char *src, uptr maxlen); char *internal_strncpy(char *dst, const char *src, uptr n); uptr internal_strnlen(const char *s, uptr maxlen); char *internal_strrchr(const char *s, int c); char *internal_strstr(const char *haystack, const char *needle); // Works only for base=10 and doesn't set errno. s64 internal_simple_strtoll(const char *nptr, const char **endptr, int base); int internal_snprintf(char *buffer, uptr length, const char *format, ...) FORMAT(3, 4); uptr internal_wcslen(const wchar_t *s); uptr internal_wcsnlen(const wchar_t *s, uptr maxlen); wchar_t *internal_wcscpy(wchar_t *dst, const wchar_t *src); wchar_t *internal_wcsncpy(wchar_t *dst, const wchar_t *src, uptr maxlen); // Return true if all bytes in [mem, mem+size) are zero. // Optimized for the case when the result is true. bool mem_is_zero(const char *mem, uptr size); // I/O // Define these as macros so we can use them in linker initialized global // structs without dynamic initialization. #define kInvalidFd … #define kStdinFd … #define kStdoutFd … #define kStderrFd … uptr internal_ftruncate(fd_t fd, uptr size); // OS void NORETURN internal__exit(int exitcode); void internal_sleep(unsigned seconds); void internal_usleep(u64 useconds); uptr internal_getpid(); uptr internal_getppid(); int internal_dlinfo(void *handle, int request, void *p); // Threading uptr internal_sched_yield(); // Error handling bool internal_iserror(uptr retval, int *rverrno = nullptr); } // namespace __sanitizer #endif // SANITIZER_LIBC_H
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