1 /* 2 * Copyright (C) 2020 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 #include "perfetto/ext/base/subprocess.h" 18 19 #include <tuple> 20 21 // This file contains only the common bits (ctors / dtors / move operators). 22 // The rest lives in subprocess_posix.cc and subprocess_windows.cc. 23 24 namespace perfetto { 25 namespace base { 26 27 Subprocess::Args::Args(Args&&) noexcept = default; 28 Subprocess::Args& Subprocess::Args::operator=(Args&&) = default; 29 Subprocess(std::initializer_list<std::string> a)30Subprocess::Subprocess(std::initializer_list<std::string> a) 31 : args(a), s_(new MovableState()) {} 32 Subprocess(Subprocess && other)33Subprocess::Subprocess(Subprocess&& other) noexcept { 34 static_assert(sizeof(Subprocess) == 35 sizeof(std::tuple<std::unique_ptr<MovableState>, Args>), 36 "base::Subprocess' move ctor needs updating"); 37 s_ = std::move(other.s_); 38 args = std::move(other.args); 39 40 // Reset the state of the moved-from object. 41 other.s_.reset(new MovableState()); 42 other.~Subprocess(); 43 new (&other) Subprocess(); 44 } 45 operator =(Subprocess && other)46Subprocess& Subprocess::operator=(Subprocess&& other) { 47 this->~Subprocess(); 48 new (this) Subprocess(std::move(other)); 49 return *this; 50 } 51 ~Subprocess()52Subprocess::~Subprocess() { 53 if (s_->status == kRunning) 54 KillAndWaitForTermination(); 55 } 56 Call(int timeout_ms)57bool Subprocess::Call(int timeout_ms) { 58 PERFETTO_CHECK(s_->status == kNotStarted); 59 Start(); 60 61 if (!Wait(timeout_ms)) { 62 s_->timed_out = true; 63 KillAndWaitForTermination(kTimeoutSignal); 64 } 65 PERFETTO_DCHECK(s_->status != kRunning); 66 return s_->status == kTerminated && s_->returncode == 0; 67 } 68 GetCmdString() const69std::string Subprocess::Args::GetCmdString() const { 70 std::string str; 71 for (size_t i = 0; i < exec_cmd.size(); i++) { 72 str += i > 0 ? " \"" : ""; 73 str += exec_cmd[i]; 74 str += i > 0 ? "\"" : ""; 75 } 76 return str; 77 } 78 79 } // namespace base 80 } // namespace perfetto 81