1//===-- sanitizer_posix.h -------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is shared between AddressSanitizer and ThreadSanitizer
10// run-time libraries and declares some useful POSIX-specific functions.
11//===----------------------------------------------------------------------===//
12#ifndef SANITIZER_POSIX_H
13#define SANITIZER_POSIX_H
14
15// ----------- ATTENTION -------------
16// This header should NOT include any other headers from sanitizer runtime.
17#include "sanitizer_internal_defs.h"
18#include "sanitizer_platform_limits_freebsd.h"
19#include "sanitizer_platform_limits_netbsd.h"
20#include "sanitizer_platform_limits_posix.h"
21#include "sanitizer_platform_limits_solaris.h"
22
23#if SANITIZER_POSIX
24
25namespace __sanitizer {
26
27// I/O
28// Don't use directly, use __sanitizer::OpenFile() instead.
29uptr internal_open(const char *filename, int flags);
30uptr internal_open(const char *filename, int flags, u32 mode);
31# if SANITIZER_FREEBSD
32uptr internal_close_range(fd_t lowfd, fd_t highfd, int flags);
33# endif
34uptr internal_close(fd_t fd);
35
36uptr internal_read(fd_t fd, void *buf, uptr count);
37uptr internal_write(fd_t fd, const void *buf, uptr count);
38
39// Memory
40uptr internal_mmap(void *addr, uptr length, int prot, int flags,
41 int fd, u64 offset);
42uptr internal_munmap(void *addr, uptr length);
43#if SANITIZER_LINUX
44uptr internal_mremap(void *old_address, uptr old_size, uptr new_size, int flags,
45 void *new_address);
46#endif
47int internal_mprotect(void *addr, uptr length, int prot);
48int internal_madvise(uptr addr, uptr length, int advice);
49
50// OS
51uptr internal_filesize(fd_t fd); // -1 on error.
52uptr internal_stat(const char *path, void *buf);
53uptr internal_lstat(const char *path, void *buf);
54uptr internal_fstat(fd_t fd, void *buf);
55uptr internal_dup(int oldfd);
56uptr internal_dup2(int oldfd, int newfd);
57uptr internal_readlink(const char *path, char *buf, uptr bufsize);
58uptr internal_unlink(const char *path);
59uptr internal_rename(const char *oldpath, const char *newpath);
60uptr internal_lseek(fd_t fd, OFF_T offset, int whence);
61
62#if SANITIZER_NETBSD
63uptr internal_ptrace(int request, int pid, void *addr, int data);
64#else
65uptr internal_ptrace(int request, int pid, void *addr, void *data);
66#endif
67uptr internal_waitpid(int pid, int *status, int options);
68
69int internal_fork();
70fd_t internal_spawn(const char *argv[], const char *envp[], pid_t *pid);
71
72int internal_sysctl(const int *name, unsigned int namelen, void *oldp,
73 uptr *oldlenp, const void *newp, uptr newlen);
74int internal_sysctlbyname(const char *sname, void *oldp, uptr *oldlenp,
75 const void *newp, uptr newlen);
76
77// These functions call appropriate pthread_ functions directly, bypassing
78// the interceptor. They are weak and may not be present in some tools.
79SANITIZER_WEAK_ATTRIBUTE
80int internal_pthread_create(void *th, void *attr, void *(*callback)(void *),
81 void *param);
82SANITIZER_WEAK_ATTRIBUTE
83int internal_pthread_join(void *th, void **ret);
84
85# define DEFINE_INTERNAL_PTHREAD_FUNCTIONS \
86 namespace __sanitizer { \
87 int internal_pthread_create(void *th, void *attr, \
88 void *(*callback)(void *), void *param) { \
89 return REAL(pthread_create)(th, attr, callback, param); \
90 } \
91 int internal_pthread_join(void *th, void **ret) { \
92 return REAL(pthread_join)(th, ret); \
93 } \
94 } // namespace __sanitizer
95
96int internal_pthread_attr_getstack(void *attr, void **addr, uptr *size);
97
98// A routine named real_sigaction() must be implemented by each sanitizer in
99// order for internal_sigaction() to bypass interceptors.
100int internal_sigaction(int signum, const void *act, void *oldact);
101void internal_sigfillset(__sanitizer_sigset_t *set);
102void internal_sigemptyset(__sanitizer_sigset_t *set);
103bool internal_sigismember(__sanitizer_sigset_t *set, int signum);
104
105uptr internal_execve(const char *filename, char *const argv[],
106 char *const envp[]);
107
108bool IsStateDetached(int state);
109
110// Move the fd out of {0, 1, 2} range.
111fd_t ReserveStandardFds(fd_t fd);
112
113bool ShouldMockFailureToOpen(const char *path);
114bool OpenReadsVaArgs(int oflag);
115
116// Create a non-file mapping with a given /proc/self/maps name.
117uptr MmapNamed(void *addr, uptr length, int prot, int flags, const char *name);
118
119// Platforms should implement at most one of these.
120// 1. Provide a pre-decorated file descriptor to use instead of an anonymous
121// mapping.
122int GetNamedMappingFd(const char *name, uptr size, int *flags);
123// 2. Add name to an existing anonymous mapping. The caller must keep *name
124// alive at least as long as the mapping exists.
125void DecorateMapping(uptr addr, uptr size, const char *name);
126
127# if !SANITIZER_FREEBSD
128# define __sanitizer_dirsiz(dp) ((dp)->d_reclen)
129# endif
130
131} // namespace __sanitizer
132
133#endif // SANITIZER_POSIX
134
135#endif // SANITIZER_POSIX_H
136