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//===----------------------------------------------------------------------===//
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);
29int internal_memcmp(const void* s1, const void* s2, uptr n);
30void *internal_memcpy(void *dest, const void *src, uptr n);
31void *internal_memmove(void *dest, const void *src, uptr n);
32// Should not be used in performance-critical places.
33void *internal_memset(void *s, int c, uptr n);
34char* internal_strchr(const char *s, int c);
35int internal_strcmp(const char *s1, const char *s2);
36uptr internal_strcspn(const char *s, const char *reject);
37char *internal_strdup(const char *s);
38uptr internal_strlen(const char *s);
39char *internal_strncat(char *dst, const char *src, uptr n);
40int internal_strncmp(const char *s1, const char *s2, uptr n);
41char *internal_strncpy(char *dst, const char *src, uptr n);
42uptr internal_strnlen(const char *s, uptr maxlen);
43char *internal_strrchr(const char *s, int c);
44// This is O(N^2), but we are not using it in hot places.
45char *internal_strstr(const char *haystack, const char *needle);
46// Works only for base=10 and doesn't set errno.
47s64 internal_simple_strtoll(const char *nptr, char **endptr, int base);
48int internal_snprintf(char *buffer, uptr length, const char *format, ...);
49
50// Return true if all bytes in [mem, mem+size) are zero.
51// Optimized for the case when the result is true.
52bool mem_is_zero(const char *mem, uptr size);
53
54
55// Memory
56void *internal_mmap(void *addr, uptr length, int prot, int flags,
57                    int fd, u64 offset);
58int internal_munmap(void *addr, uptr length);
59
60// I/O
61const fd_t kInvalidFd = -1;
62const fd_t kStdinFd = 0;
63const fd_t kStdoutFd = 1;
64const fd_t kStderrFd = 2;
65int internal_close(fd_t fd);
66int internal_isatty(fd_t fd);
67
68// Use __sanitizer::OpenFile() instead.
69fd_t internal_open(const char *filename, int flags);
70fd_t internal_open(const char *filename, int flags, u32 mode);
71
72uptr internal_read(fd_t fd, void *buf, uptr count);
73uptr internal_write(fd_t fd, const void *buf, uptr count);
74
75// OS
76uptr internal_filesize(fd_t fd);  // -1 on error.
77int internal_stat(const char *path, void *buf);
78int internal_lstat(const char *path, void *buf);
79int internal_fstat(fd_t fd, void *buf);
80int internal_dup2(int oldfd, int newfd);
81uptr internal_readlink(const char *path, char *buf, uptr bufsize);
82void NORETURN internal__exit(int exitcode);
83OFF_T internal_lseek(fd_t fd, OFF_T offset, int whence);
84
85long internal_ptrace(int request, int pid, void *addr, void *data);
86int internal_waitpid(int pid, int *status, int options);
87int internal_getppid();
88
89// Threading
90int internal_sched_yield();
91
92}  // namespace __sanitizer
93
94#endif  // SANITIZER_LIBC_H
95