1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBMEMUNREACHABLE_PTRACER_THREAD_H_ 18 #define LIBMEMUNREACHABLE_PTRACER_THREAD_H_ 19 20 #include <functional> 21 #include <mutex> 22 23 #include "android-base/macros.h" 24 25 #include "Allocator.h" 26 27 class Stack; 28 29 // PtracerThread is similar to std::thread, except that it creates a "thread" 30 // that can ptrace the other threads. The thread is actually a separate 31 // process, with its own thread group, but shares address space and fds with 32 // the parent. 33 class PtracerThread { 34 public: 35 PtracerThread(const std::function<int()>& func); 36 ~PtracerThread(); 37 bool Start(); 38 int Join(); 39 private: 40 void SetTracer(pid_t); 41 void ClearTracer(); 42 void Kill(); 43 DISALLOW_COPY_AND_ASSIGN(PtracerThread); 44 std::unique_ptr<Stack> stack_; 45 std::function<int()> func_; 46 std::mutex m_; 47 pid_t child_pid_; 48 }; 49 50 #endif // LIBMEMUNREACHABLE_PTRACER_THREAD_H_ 51
