//===-- sanitizer_stoptheworld.h --------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // Defines the StopTheWorld function which suspends the execution of the current // process and runs the user-supplied callback in the same address space. // //===----------------------------------------------------------------------===// #ifndef SANITIZER_STOPTHEWORLD_H #define SANITIZER_STOPTHEWORLD_H #include "sanitizer_internal_defs.h" #include "sanitizer_common.h" namespace __sanitizer { typedef int SuspendedThreadID; // Holds the list of suspended threads and provides an interface to dump their // register contexts. class SuspendedThreadsList { public: SuspendedThreadsList() : thread_ids_(1024) {} SuspendedThreadID GetThreadID(uptr index) const { CHECK_LT(index, thread_ids_.size()); return thread_ids_[index]; } int GetRegistersAndSP(uptr index, uptr *buffer, uptr *sp) const; // The buffer in GetRegistersAndSP should be at least this big. static uptr RegisterCount(); uptr thread_count() const { return thread_ids_.size(); } bool Contains(SuspendedThreadID thread_id) const { for (uptr i = 0; i < thread_ids_.size(); i++) { if (thread_ids_[i] == thread_id) return true; } return false; } void Append(SuspendedThreadID thread_id) { thread_ids_.push_back(thread_id); } private: InternalMmapVector<SuspendedThreadID> thread_ids_; // Prohibit copy and assign. SuspendedThreadsList(const SuspendedThreadsList&); void operator=(const SuspendedThreadsList&); }; typedef void (*StopTheWorldCallback)( const SuspendedThreadsList &suspended_threads_list, void *argument); // Suspend all threads in the current process and run the callback on the list // of suspended threads. This function will resume the threads before returning. // The callback should not call any libc functions. // This function should NOT be called from multiple threads simultaneously. void StopTheWorld(StopTheWorldCallback callback, void *argument); } // namespace __sanitizer #endif // SANITIZER_STOPTHEWORLD_H