| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <stdlib.h> |
| #include <array> |
| #include <memory> |
| #include <vector> |
| |
| #include "src/ipc/unix_socket.h" |
| #include "src/profiling/memory/bounded_queue.h" |
| #include "src/profiling/memory/socket_listener.h" |
| |
| #include "perfetto/base/unix_task_runner.h" |
| |
| namespace perfetto { |
| namespace { |
| |
| constexpr size_t kUnwinderQueueSize = 1000; |
| constexpr size_t kBookkeepingQueueSize = 1000; |
| constexpr size_t kUnwinderThreads = 5; |
| |
| // We create kUnwinderThreads unwinding threads and one bookeeping thread. |
| // The bookkeeping thread is singleton in order to avoid expensive and |
| // complicated synchronisation in the bookkeeping. |
| // |
| // We wire up the system by creating BoundedQueues between the threads. The main |
| // thread runs the TaskRunner driving the SocketListener. The unwinding thread |
| // takes the data received by the SocketListener and if it is a malloc does |
| // stack unwinding, and if it is a free just forwards the content of the record |
| // to the bookkeeping thread. |
| // |
| // +--------------+ |
| // |SocketListener| |
| // +------+-------+ |
| // | |
| // +--UnwindingRecord -+ |
| // | | |
| // +--------v-------+ +-------v--------+ |
| // |Unwinding Thread| |Unwinding Thread| |
| // +--------+-------+ +-------+--------+ |
| // | | |
| // +-BookkeepingRecord + |
| // | |
| // +--------v---------+ |
| // |Bookkeeping Thread| |
| // +------------------+ |
| int HeapprofdMain(int argc, char** argv) { |
| GlobalCallstackTrie callsites; |
| std::unique_ptr<ipc::UnixSocket> sock; |
| |
| BoundedQueue<BookkeepingRecord> callsites_queue(kBookkeepingQueueSize); |
| std::thread bookkeeping_thread( |
| [&callsites_queue] { BookkeepingMainLoop(&callsites_queue); }); |
| |
| std::array<BoundedQueue<UnwindingRecord>, kUnwinderThreads> unwinder_queues; |
| for (size_t i = 0; i < kUnwinderThreads; ++i) |
| unwinder_queues[i].SetSize(kUnwinderQueueSize); |
| std::vector<std::thread> unwinding_threads; |
| unwinding_threads.reserve(kUnwinderThreads); |
| for (size_t i = 0; i < kUnwinderThreads; ++i) { |
| unwinding_threads.emplace_back([&unwinder_queues, &callsites_queue, i] { |
| UnwindingMainLoop(&unwinder_queues[i], &callsites_queue); |
| }); |
| } |
| |
| auto on_record_received = [&unwinder_queues](UnwindingRecord r) { |
| unwinder_queues[static_cast<size_t>(r.pid) % kUnwinderThreads].Add( |
| std::move(r)); |
| }; |
| SocketListener listener(std::move(on_record_received), &callsites); |
| |
| base::UnixTaskRunner read_task_runner; |
| if (argc == 2) { |
| // Allow to be able to manually specify the socket to listen on |
| // for testing and sideloading purposes. |
| sock = ipc::UnixSocket::Listen(argv[1], &listener, &read_task_runner); |
| } else if (argc == 1) { |
| // When running as a service launched by init on Android, the socket |
| // is created by init and passed to the application using an environment |
| // variable. |
| const char* sock_fd = getenv("ANDROID_SOCKET_heapprofd"); |
| if (sock_fd == nullptr) |
| PERFETTO_FATAL( |
| "No argument given and environment variable ANDROID_SOCKET_heapprof " |
| "is unset."); |
| char* end; |
| int raw_fd = static_cast<int>(strtol(sock_fd, &end, 10)); |
| if (*end != '\0') |
| PERFETTO_FATAL( |
| "Invalid ANDROID_SOCKET_heapprofd. Expected decimal integer."); |
| sock = ipc::UnixSocket::Listen(base::ScopedFile(raw_fd), &listener, |
| &read_task_runner); |
| } else { |
| PERFETTO_FATAL("Invalid number of arguments. %s [SOCKET]", argv[0]); |
| } |
| |
| if (sock->last_error() != 0) |
| PERFETTO_FATAL("Failed to initialize socket: %s", |
| strerror(sock->last_error())); |
| |
| read_task_runner.Run(); |
| return 0; |
| } |
| } // namespace |
| } // namespace perfetto |
| |
| int main(int argc, char** argv) { |
| return perfetto::HeapprofdMain(argc, argv); |
| } |