Florian Mayer | b64d6b1 | 2018-08-30 10:46:30 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 <stdlib.h> |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame^] | 18 | #include <array> |
Florian Mayer | b64d6b1 | 2018-08-30 10:46:30 -0700 | [diff] [blame] | 19 | #include <memory> |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame^] | 20 | #include <vector> |
Florian Mayer | b64d6b1 | 2018-08-30 10:46:30 -0700 | [diff] [blame] | 21 | |
| 22 | #include "src/ipc/unix_socket.h" |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame^] | 23 | #include "src/profiling/memory/bounded_queue.h" |
Florian Mayer | b64d6b1 | 2018-08-30 10:46:30 -0700 | [diff] [blame] | 24 | #include "src/profiling/memory/socket_listener.h" |
| 25 | |
| 26 | #include "perfetto/base/unix_task_runner.h" |
| 27 | |
| 28 | namespace perfetto { |
| 29 | namespace { |
| 30 | |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame^] | 31 | constexpr size_t kUnwinderQueueSize = 1000; |
| 32 | constexpr size_t kBookkeepingQueueSize = 1000; |
| 33 | constexpr size_t kUnwinderThreads = 5; |
| 34 | |
| 35 | // We create kUnwinderThreads unwinding threads and one bookeeping thread. |
| 36 | // The bookkeeping thread is singleton in order to avoid expensive and |
| 37 | // complicated synchronisation in the bookkeeping. |
| 38 | // |
| 39 | // We wire up the system by creating BoundedQueues between the threads. The main |
| 40 | // thread runs the TaskRunner driving the SocketListener. The unwinding thread |
| 41 | // takes the data received by the SocketListener and if it is a malloc does |
| 42 | // stack unwinding, and if it is a free just forwards the content of the record |
| 43 | // to the bookkeeping thread. |
| 44 | // |
| 45 | // +--------------+ |
| 46 | // |SocketListener| |
| 47 | // +------+-------+ |
| 48 | // | |
| 49 | // +--UnwindingRecord -+ |
| 50 | // | | |
| 51 | // +--------v-------+ +-------v--------+ |
| 52 | // |Unwinding Thread| |Unwinding Thread| |
| 53 | // +--------+-------+ +-------+--------+ |
| 54 | // | | |
| 55 | // +-BookkeepingRecord + |
| 56 | // | |
| 57 | // +--------v---------+ |
| 58 | // |Bookkeeping Thread| |
| 59 | // +------------------+ |
Florian Mayer | b64d6b1 | 2018-08-30 10:46:30 -0700 | [diff] [blame] | 60 | int HeapprofdMain(int argc, char** argv) { |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame^] | 61 | GlobalCallstackTrie callsites; |
Florian Mayer | b64d6b1 | 2018-08-30 10:46:30 -0700 | [diff] [blame] | 62 | std::unique_ptr<ipc::UnixSocket> sock; |
| 63 | |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame^] | 64 | BoundedQueue<BookkeepingRecord> callsites_queue(kBookkeepingQueueSize); |
| 65 | std::thread bookkeeping_thread( |
| 66 | [&callsites_queue] { BookkeepingMainLoop(&callsites_queue); }); |
| 67 | |
| 68 | std::array<BoundedQueue<UnwindingRecord>, kUnwinderThreads> unwinder_queues; |
| 69 | for (size_t i = 0; i < kUnwinderThreads; ++i) |
| 70 | unwinder_queues[i].SetSize(kUnwinderQueueSize); |
| 71 | std::vector<std::thread> unwinding_threads; |
| 72 | unwinding_threads.reserve(kUnwinderThreads); |
| 73 | for (size_t i = 0; i < kUnwinderThreads; ++i) { |
| 74 | unwinding_threads.emplace_back([&unwinder_queues, &callsites_queue, i] { |
| 75 | UnwindingMainLoop(&unwinder_queues[i], &callsites_queue); |
| 76 | }); |
| 77 | } |
| 78 | |
| 79 | auto on_record_received = [&unwinder_queues](UnwindingRecord r) { |
| 80 | unwinder_queues[static_cast<size_t>(r.pid) % kUnwinderThreads].Add( |
| 81 | std::move(r)); |
| 82 | }; |
| 83 | SocketListener listener(std::move(on_record_received), &callsites); |
| 84 | |
Florian Mayer | b64d6b1 | 2018-08-30 10:46:30 -0700 | [diff] [blame] | 85 | base::UnixTaskRunner read_task_runner; |
| 86 | if (argc == 2) { |
| 87 | // Allow to be able to manually specify the socket to listen on |
| 88 | // for testing and sideloading purposes. |
| 89 | sock = ipc::UnixSocket::Listen(argv[1], &listener, &read_task_runner); |
| 90 | } else if (argc == 1) { |
| 91 | // When running as a service launched by init on Android, the socket |
| 92 | // is created by init and passed to the application using an environment |
| 93 | // variable. |
| 94 | const char* sock_fd = getenv("ANDROID_SOCKET_heapprofd"); |
| 95 | if (sock_fd == nullptr) |
| 96 | PERFETTO_FATAL( |
| 97 | "No argument given and environment variable ANDROID_SOCKET_heapprof " |
| 98 | "is unset."); |
| 99 | char* end; |
| 100 | int raw_fd = static_cast<int>(strtol(sock_fd, &end, 10)); |
| 101 | if (*end != '\0') |
| 102 | PERFETTO_FATAL( |
| 103 | "Invalid ANDROID_SOCKET_heapprofd. Expected decimal integer."); |
| 104 | sock = ipc::UnixSocket::Listen(base::ScopedFile(raw_fd), &listener, |
| 105 | &read_task_runner); |
| 106 | } else { |
| 107 | PERFETTO_FATAL("Invalid number of arguments. %s [SOCKET]", argv[0]); |
| 108 | } |
| 109 | |
| 110 | if (sock->last_error() != 0) |
| 111 | PERFETTO_FATAL("Failed to initialize socket: %s", |
| 112 | strerror(sock->last_error())); |
| 113 | |
| 114 | read_task_runner.Run(); |
| 115 | return 0; |
| 116 | } |
| 117 | } // namespace |
| 118 | } // namespace perfetto |
| 119 | |
| 120 | int main(int argc, char** argv) { |
| 121 | return perfetto::HeapprofdMain(argc, argv); |
| 122 | } |