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// Set [s, s + n) to 0. Both s and n should be 16-aligned.
33void internal_bzero_aligned16(void *s, uptr n);
34// Should not be used in performance-critical places.
35void *internal_memset(void *s, int c, uptr n);
36char* internal_strchr(const char *s, int c);
37char *internal_strchrnul(const char *s, int c);
38int internal_strcmp(const char *s1, const char *s2);
39uptr internal_strcspn(const char *s, const char *reject);
40char *internal_strdup(const char *s);
41uptr internal_strlen(const char *s);
42char *internal_strncat(char *dst, const char *src, uptr n);
43int internal_strncmp(const char *s1, const char *s2, uptr n);
44char *internal_strncpy(char *dst, const char *src, uptr n);
45uptr internal_strnlen(const char *s, uptr maxlen);
46char *internal_strrchr(const char *s, int c);
47// This is O(N^2), but we are not using it in hot places.
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, 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
58// Memory
59uptr internal_mmap(void *addr, uptr length, int prot, int flags,
60                   int fd, u64 offset);
61uptr internal_munmap(void *addr, uptr length);
62
63// I/O
64const fd_t kInvalidFd = -1;
65const fd_t kStdinFd = 0;
66const fd_t kStdoutFd = 1;
67const fd_t kStderrFd = 2;
68uptr internal_close(fd_t fd);
69int internal_isatty(fd_t fd);
70
71// Use __sanitizer::OpenFile() instead.
72uptr internal_open(const char *filename, int flags);
73uptr internal_open(const char *filename, int flags, u32 mode);
74
75uptr internal_read(fd_t fd, void *buf, uptr count);
76uptr internal_write(fd_t fd, const void *buf, uptr count);
77uptr internal_ftruncate(fd_t fd, uptr size);
78
79// OS
80uptr internal_filesize(fd_t fd);  // -1 on error.
81uptr internal_stat(const char *path, void *buf);
82uptr internal_lstat(const char *path, void *buf);
83uptr internal_fstat(fd_t fd, void *buf);
84uptr internal_dup2(int oldfd, int newfd);
85uptr internal_readlink(const char *path, char *buf, uptr bufsize);
86uptr internal_unlink(const char *path);
87uptr internal_rename(const char *oldpath, const char *newpath);
88void NORETURN internal__exit(int exitcode);
89uptr internal_lseek(fd_t fd, OFF_T offset, int whence);
90
91uptr internal_ptrace(int request, int pid, void *addr, void *data);
92uptr internal_waitpid(int pid, int *status, int options);
93uptr internal_getpid();
94uptr internal_getppid();
95
96int internal_fork();
97
98// Threading
99uptr internal_sched_yield();
100
101// Error handling
102bool internal_iserror(uptr retval, int *rverrno = 0);
103
104int internal_sigaction(int signum, const void *act, void *oldact);
105
106}  // namespace __sanitizer
107
108#endif  // SANITIZER_LIBC_H
109