lib/sanitizer_common/sanitizer_libc.h

//===-- sanitizer_libc.h ----------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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.

// 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);
void *internal_memcpy(void *dest, const void *src, uptr n);
void *internal_memmove(void *dest, const void *src, uptr n);
// Set [s, s + n) to 0. Both s and n should be 16-aligned.
void internal_bzero_aligned16(void *s, uptr n);
// Should not be used in performance-critical places.
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);
char *internal_strndup(const char *s, uptr n);
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);
// This is O(N^2), but we are not using it in hot places.
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, char **endptr, int base);
int internal_snprintf(char *buffer, uptr length, const char *format, ...);

// 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
const fd_t kInvalidFd = (fd_t)-1;
const fd_t kStdinFd = 0;
const fd_t kStdoutFd = (fd_t)1;
const fd_t kStderrFd = (fd_t)2;

uptr internal_ftruncate(fd_t fd, uptr size);

// OS
void NORETURN internal__exit(int exitcode);

uptr internal_getpid();
uptr internal_getppid();

// Threading
uptr internal_sched_yield();

// Error handling
bool internal_iserror(uptr retval, int *rverrno = nullptr);

} // namespace __sanitizer

#endif // SANITIZER_LIBC_H