Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [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 | #ifndef SRC_PROFILING_MEMORY_CLIENT_H_ |
| 18 | #define SRC_PROFILING_MEMORY_CLIENT_H_ |
| 19 | |
Florian Mayer | 88665be | 2018-10-03 13:15:38 +0100 | [diff] [blame] | 20 | #include <pthread.h> |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 21 | #include <stddef.h> |
Florian Mayer | af26602 | 2018-09-17 15:18:15 +0100 | [diff] [blame] | 22 | |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 23 | #include <mutex> |
| 24 | #include <vector> |
| 25 | |
| 26 | #include "perfetto/base/scoped_file.h" |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 27 | #include "src/profiling/memory/wire_protocol.h" |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 28 | |
| 29 | namespace perfetto { |
Florian Mayer | 8c0d048 | 2018-10-22 14:23:40 +0100 | [diff] [blame^] | 30 | namespace profiling { |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 31 | |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 32 | class BorrowedSocket; |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 33 | |
| 34 | class SocketPool { |
| 35 | public: |
| 36 | friend class BorrowedSocket; |
| 37 | SocketPool(std::vector<base::ScopedFile> sockets); |
| 38 | |
| 39 | BorrowedSocket Borrow(); |
| 40 | |
| 41 | private: |
| 42 | void Return(base::ScopedFile fd); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 43 | std::mutex mutex_; |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 44 | std::condition_variable cv_; |
| 45 | std::vector<base::ScopedFile> sockets_; |
| 46 | size_t available_sockets_; |
Florian Mayer | af26602 | 2018-09-17 15:18:15 +0100 | [diff] [blame] | 47 | size_t dead_sockets_ = 0; |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 48 | }; |
| 49 | |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 50 | // Socket borrowed from a SocketPool. Gets returned once it goes out of scope. |
| 51 | class BorrowedSocket { |
| 52 | public: |
| 53 | BorrowedSocket(const BorrowedSocket&) = delete; |
| 54 | BorrowedSocket& operator=(const BorrowedSocket&) = delete; |
| 55 | BorrowedSocket(BorrowedSocket&& other) noexcept { |
| 56 | fd_ = std::move(other.fd_); |
| 57 | socket_pool_ = other.socket_pool_; |
| 58 | other.socket_pool_ = nullptr; |
| 59 | } |
| 60 | |
| 61 | BorrowedSocket(base::ScopedFile fd, SocketPool* socket_pool) |
| 62 | : fd_(std::move(fd)), socket_pool_(socket_pool) {} |
| 63 | |
| 64 | ~BorrowedSocket() { |
| 65 | if (socket_pool_ != nullptr) |
| 66 | socket_pool_->Return(std::move(fd_)); |
| 67 | } |
| 68 | |
| 69 | int operator*() { return get(); } |
| 70 | |
| 71 | int get() { return *fd_; } |
| 72 | |
| 73 | void Close() { fd_.reset(); } |
| 74 | |
Florian Mayer | f1510c4 | 2018-10-17 11:40:52 +0100 | [diff] [blame] | 75 | operator bool() const { return !!fd_; } |
| 76 | |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 77 | private: |
| 78 | base::ScopedFile fd_; |
| 79 | SocketPool* socket_pool_ = nullptr; |
| 80 | }; |
| 81 | |
| 82 | // Cache for frees that have been observed. It is infeasible to send every |
| 83 | // free separately, so we batch and send the whole buffer once it is full. |
| 84 | class FreePage { |
| 85 | public: |
| 86 | // Add address to buffer. Flush if necessary using a socket borrowed from |
| 87 | // pool. |
| 88 | // Can be called from any thread. Must not hold mutex_.` |
| 89 | void Add(const uint64_t addr, uint64_t sequence_number, SocketPool* pool); |
| 90 | |
| 91 | private: |
| 92 | // Needs to be called holding mutex_. |
| 93 | void FlushLocked(SocketPool* pool); |
| 94 | |
| 95 | FreeMetadata free_page_; |
| 96 | std::mutex mutex_; |
| 97 | size_t offset_ = 0; |
| 98 | }; |
| 99 | |
| 100 | const char* GetThreadStackBase(); |
| 101 | |
Florian Mayer | 88665be | 2018-10-03 13:15:38 +0100 | [diff] [blame] | 102 | // RAII wrapper around pthread_key_t. This is different from a ScopedResource |
| 103 | // because it needs a separate boolean indicating validity. |
| 104 | class PThreadKey { |
| 105 | public: |
| 106 | PThreadKey(const PThreadKey&) = delete; |
| 107 | PThreadKey& operator=(const PThreadKey&) = delete; |
| 108 | |
| 109 | PThreadKey(void (*destructor)(void*)) noexcept |
| 110 | : valid_(pthread_key_create(&key_, destructor) == 0) {} |
| 111 | ~PThreadKey() noexcept { |
| 112 | if (valid_) |
| 113 | pthread_key_delete(key_); |
| 114 | } |
| 115 | bool valid() const { return valid_; } |
| 116 | pthread_key_t get() const { |
| 117 | PERFETTO_DCHECK(valid_); |
| 118 | return key_; |
| 119 | } |
| 120 | |
| 121 | private: |
| 122 | pthread_key_t key_; |
| 123 | bool valid_; |
| 124 | }; |
| 125 | |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 126 | // This is created and owned by the malloc hooks. |
| 127 | class Client { |
| 128 | public: |
| 129 | Client(std::vector<base::ScopedFile> sockets); |
| 130 | Client(const std::string& sock_name, size_t conns); |
Florian Mayer | 9a7fb2b | 2018-10-17 18:17:40 +0100 | [diff] [blame] | 131 | void RecordMalloc(uint64_t alloc_size, |
| 132 | uint64_t total_size, |
| 133 | uint64_t alloc_address); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 134 | void RecordFree(uint64_t alloc_address); |
Florian Mayer | 9a7fb2b | 2018-10-17 18:17:40 +0100 | [diff] [blame] | 135 | void MaybeSampleAlloc(uint64_t alloc_size, |
| 136 | uint64_t alloc_address, |
| 137 | void* (*unhooked_malloc)(size_t), |
| 138 | void (*unhooked_free)(void*)); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 139 | |
Florian Mayer | 1fe7773 | 2018-10-02 17:25:53 +0100 | [diff] [blame] | 140 | ClientConfiguration client_config_for_testing() { return client_config_; } |
| 141 | |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 142 | private: |
Florian Mayer | 9a7fb2b | 2018-10-17 18:17:40 +0100 | [diff] [blame] | 143 | size_t ShouldSampleAlloc(uint64_t alloc_size, |
| 144 | void* (*unhooked_malloc)(size_t), |
| 145 | void (*unhooked_free)(void*)); |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 146 | const char* GetStackBase(); |
| 147 | |
Florian Mayer | f1510c4 | 2018-10-17 11:40:52 +0100 | [diff] [blame] | 148 | bool inited_ = false; |
Florian Mayer | 1fe7773 | 2018-10-02 17:25:53 +0100 | [diff] [blame] | 149 | ClientConfiguration client_config_; |
Florian Mayer | 88665be | 2018-10-03 13:15:38 +0100 | [diff] [blame] | 150 | PThreadKey pthread_key_; |
Florian Mayer | b85a938 | 2018-09-27 13:59:01 +0100 | [diff] [blame] | 151 | SocketPool socket_pool_; |
| 152 | FreePage free_page_; |
| 153 | const char* main_thread_stack_base_ = nullptr; |
| 154 | std::atomic<uint64_t> sequence_number_{0}; |
| 155 | }; |
| 156 | |
Florian Mayer | 8c0d048 | 2018-10-22 14:23:40 +0100 | [diff] [blame^] | 157 | } // namespace profiling |
Florian Mayer | 824274d | 2018-09-17 11:33:45 +0100 | [diff] [blame] | 158 | } // namespace perfetto |
| 159 | |
| 160 | #endif // SRC_PROFILING_MEMORY_CLIENT_H_ |