sanitizer_libc.h revision 72870db5f2e0e83b2e925eef594dacfae275a8de 
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);
35char *internal_strchrnul(const char *s, int c);
36int internal_strcmp(const char *s1, const char *s2);
37uptr internal_strcspn(const char *s, const char *reject);
38char *internal_strdup(const char *s);
39uptr internal_strlen(const char *s);
40char *internal_strncat(char *dst, const char *src, uptr n);
41int internal_strncmp(const char *s1, const char *s2, uptr n);
42char *internal_strncpy(char *dst, const char *src, uptr n);
43uptr internal_strnlen(const char *s, uptr maxlen);
44char *internal_strrchr(const char *s, int c);
45// This is O(N^2), but we are not using it in hot places.
46char *internal_strstr(const char *haystack, const char *needle);
47// Works only for base=10 and doesn't set errno.
48s64 internal_simple_strtoll(const char *nptr, char **endptr, int base);
49int internal_snprintf(char *buffer, uptr length, const char *format, ...);
50
51// Return true if all bytes in [mem, mem+size) are zero.
52// Optimized for the case when the result is true.
53bool mem_is_zero(const char *mem, uptr size);
54
55
56// Memory
57uptr internal_mmap(void *addr, uptr length, int prot, int flags,
58                   int fd, u64 offset);
59uptr internal_munmap(void *addr, uptr length);
60
61// I/O
62const fd_t kInvalidFd = -1;
63const fd_t kStdinFd = 0;
64const fd_t kStdoutFd = 1;
65const fd_t kStderrFd = 2;
66uptr internal_close(fd_t fd);
67int internal_isatty(fd_t fd);
68
69// Use __sanitizer::OpenFile() instead.
70uptr internal_open(const char *filename, int flags);
71uptr internal_open(const char *filename, int flags, u32 mode);
72
73uptr internal_read(fd_t fd, void *buf, uptr count);
74uptr internal_write(fd_t fd, const void *buf, uptr count);
75
76// OS
77uptr internal_filesize(fd_t fd);  // -1 on error.
78uptr internal_stat(const char *path, void *buf);
79uptr internal_lstat(const char *path, void *buf);
80uptr internal_fstat(fd_t fd, void *buf);
81uptr internal_dup2(int oldfd, int newfd);
82uptr internal_readlink(const char *path, char *buf, uptr bufsize);
83uptr internal_unlink(const char *path);
84void NORETURN internal__exit(int exitcode);
85uptr internal_lseek(fd_t fd, OFF_T offset, int whence);
86
87uptr internal_ptrace(int request, int pid, void *addr, void *data);
88uptr internal_waitpid(int pid, int *status, int options);
89uptr internal_getpid();
90uptr internal_getppid();
91
92// Threading
93uptr internal_sched_yield();
94
95// Error handling
96bool internal_iserror(uptr retval, int *rverrno = 0);
97
98}  // namespace __sanitizer
99
100#endif  // SANITIZER_LIBC_H
101