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90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//===-- sanitizer_linux.h ---------------------------------------*- C++ -*-===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Linux-specific syscall wrappers and classes.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_LINUX_H
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#define SANITIZER_LINUX_H
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#include "sanitizer_platform.h"
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#if SANITIZER_FREEBSD || SANITIZER_LINUX
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#include "sanitizer_common.h"
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_posix.h"
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#include "sanitizer_platform_limits_posix.h"
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struct link_map; // Opaque type returned by dlopen().
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namespace __sanitizer {
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// Dirent structure for getdents(). Note that this structure is different from
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// the one in <dirent.h>, which is used by readdir().
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struct linux_dirent;
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// Syscall wrappers.
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uptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count);
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uptr internal_sigaltstack(const void* ss, void* oss);
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uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
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__sanitizer_sigset_t *oldset);
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// Linux-only syscalls.
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#if SANITIZER_LINUX
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uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5);
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// Used only by sanitizer_stoptheworld. Signal handlers that are actually used
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// (like the process-wide error reporting SEGV handler) must use
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// internal_sigaction instead.
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int internal_sigaction_norestorer(int signum, const void *act, void *oldact);
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#if (defined(__x86_64__) || SANITIZER_MIPS64) && !SANITIZER_GO
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// Uses a raw system call to avoid interceptors.
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int internal_sigaction_syscall(int signum, const void *act, void *oldact);
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#endif
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void internal_sigdelset(__sanitizer_sigset_t *set, int signum);
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#if defined(__x86_64__) || defined(__mips__) || defined(__aarch64__) \
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|| defined(__powerpc64__) || defined(__s390__)
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uptr internal_clone(int (*fn)(void *), void *child_stack, int flags, void *arg,
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int *parent_tidptr, void *newtls, int *child_tidptr);
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#endif
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#endif // SANITIZER_LINUX
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// This class reads thread IDs from /proc/<pid>/task using only syscalls.
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class ThreadLister {
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public:
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explicit ThreadLister(int pid);
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~ThreadLister();
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// GetNextTID returns -1 if the list of threads is exhausted, or if there has
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// been an error.
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int GetNextTID();
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void Reset();
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bool error();
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private:
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bool GetDirectoryEntries();
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int pid_;
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int descriptor_;
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InternalScopedBuffer<char> buffer_;
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bool error_;
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struct linux_dirent* entry_;
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int bytes_read_;
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};
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// Exposed for testing.
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uptr ThreadDescriptorSize();
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uptr ThreadSelf();
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uptr ThreadSelfOffset();
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// Matches a library's file name against a base name (stripping path and version
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// information).
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bool LibraryNameIs(const char *full_name, const char *base_name);
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// Call cb for each region mapped by map.
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void ForEachMappedRegion(link_map *map, void (*cb)(const void *, uptr));
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} // namespace __sanitizer
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#endif // SANITIZER_FREEBSD || SANITIZER_LINUX
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#endif // SANITIZER_LINUX_H
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