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