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