1 //===-- sanitizer_linux.h ---------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Linux-specific syscall wrappers and classes.
12 //===----------------------------------------------------------------------===//
13 #ifndef SANITIZER_LINUX_H
14 #define SANITIZER_LINUX_H
16 #include "sanitizer_platform.h"
17 #if SANITIZER_FREEBSD || SANITIZER_LINUX
18 #include "sanitizer_common.h"
19 #include "sanitizer_internal_defs.h"
20 #include "sanitizer_posix.h"
21 #include "sanitizer_platform_limits_posix.h"
23 struct link_map; // Opaque type returned by dlopen().
26 namespace __sanitizer {
27 // Dirent structure for getdents(). Note that this structure is different from
28 // the one in <dirent.h>, which is used by readdir().
32 uptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count);
33 uptr internal_sigaltstack(const struct sigaltstack* ss,
34 struct sigaltstack* oss);
35 uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
36 __sanitizer_sigset_t *oldset);
38 // Linux-only syscalls.
40 uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5);
41 // Used only by sanitizer_stoptheworld. Signal handlers that are actually used
42 // (like the process-wide error reporting SEGV handler) must use
43 // internal_sigaction instead.
44 int internal_sigaction_norestorer(int signum, const void *act, void *oldact);
45 #if (defined(__x86_64__) || SANITIZER_MIPS64) && !SANITIZER_GO
46 // Uses a raw system call to avoid interceptors.
47 int internal_sigaction_syscall(int signum, const void *act, void *oldact);
49 void internal_sigdelset(__sanitizer_sigset_t *set, int signum);
50 #if defined(__x86_64__) || defined(__mips__) || defined(__aarch64__) \
51 || defined(__powerpc64__) || defined(__s390__)
52 uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
53 int *parent_tidptr, void *newtls, int *child_tidptr);
55 #endif // SANITIZER_LINUX
57 // This class reads thread IDs from /proc/<pid>/task using only syscalls.
60 explicit ThreadLister(int pid);
62 // GetNextTID returns -1 if the list of threads is exhausted, or if there has
69 bool GetDirectoryEntries();
73 InternalScopedBuffer<char> buffer_;
75 struct linux_dirent* entry_;
79 // Exposed for testing.
80 uptr ThreadDescriptorSize();
82 uptr ThreadSelfOffset();
84 // Matches a library's file name against a base name (stripping path and version
86 bool LibraryNameIs(const char *full_name, const char *base_name);
88 // Call cb for each region mapped by map.
89 void ForEachMappedRegion(link_map *map, void (*cb)(const void *, uptr));
90 } // namespace __sanitizer
92 #endif // SANITIZER_FREEBSD || SANITIZER_LINUX
93 #endif // SANITIZER_LINUX_H