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 "test/fake_producer.h"
18
19 #include <mutex>
20 #include <thread>
21
22 #include "perfetto/base/logging.h"
23 #include "perfetto/base/time.h"
24 #include "perfetto/ext/base/utils.h"
25 #include "perfetto/ext/tracing/core/commit_data_request.h"
26 #include "perfetto/ext/tracing/core/shared_memory_arbiter.h"
27 #include "perfetto/ext/tracing/core/trace_packet.h"
28 #include "perfetto/ext/tracing/core/trace_writer.h"
29 #include "perfetto/tracing/core/data_source_config.h"
30 #include "src/ipc/client_impl.h"
31 #include "src/tracing/ipc/producer/producer_ipc_client_impl.h"
32
33 #include "protos/perfetto/config/test_config.gen.h"
34 #include "protos/perfetto/trace/test_event.pbzero.h"
35 #include "protos/perfetto/trace/trace_packet.pbzero.h"
36
37 namespace perfetto {
38
39 namespace {
40 const MaybeUnboundBufferID kStartupTargetBufferReservationId = 1;
41 } // namespace
42
FakeProducer(const std::string & name,base::TaskRunner * task_runner)43 FakeProducer::FakeProducer(const std::string& name,
44 base::TaskRunner* task_runner)
45 : name_(name), task_runner_(task_runner) {}
46 FakeProducer::~FakeProducer() = default;
47
Connect(const char * socket_name,std::function<void ()> on_connect,std::function<void ()> on_setup_data_source_instance,std::function<void ()> on_create_data_source_instance,std::unique_ptr<SharedMemory> shm,std::unique_ptr<SharedMemoryArbiter> shm_arbiter)48 void FakeProducer::Connect(const char* socket_name,
49 std::function<void()> on_connect,
50 std::function<void()> on_setup_data_source_instance,
51 std::function<void()> on_create_data_source_instance,
52 std::unique_ptr<SharedMemory> shm,
53 std::unique_ptr<SharedMemoryArbiter> shm_arbiter) {
54 PERFETTO_DCHECK_THREAD(thread_checker_);
55 endpoint_ = ProducerIPCClient::Connect(
56 socket_name, this, "android.perfetto.FakeProducer", task_runner_,
57 TracingService::ProducerSMBScrapingMode::kDefault,
58 /*shared_memory_size_hint_bytes=*/0,
59 /*shared_memory_page_size_hint_bytes=*/4096, std::move(shm),
60 std::move(shm_arbiter));
61 on_connect_ = std::move(on_connect);
62 on_setup_data_source_instance_ = std::move(on_setup_data_source_instance);
63 on_create_data_source_instance_ = std::move(on_create_data_source_instance);
64 }
65
OnConnect()66 void FakeProducer::OnConnect() {
67 PERFETTO_DCHECK_THREAD(thread_checker_);
68 DataSourceDescriptor descriptor;
69 descriptor.set_name(name_);
70 endpoint_->RegisterDataSource(descriptor);
71 auto on_connect_callback = std::move(on_connect_);
72 auto task_runner = task_runner_;
73 endpoint_->Sync([task_runner, on_connect_callback] {
74 task_runner->PostTask(on_connect_callback);
75 });
76 }
77
OnDisconnect()78 void FakeProducer::OnDisconnect() {
79 PERFETTO_DCHECK_THREAD(thread_checker_);
80 PERFETTO_FATAL("Producer unexpectedly disconnected from the service");
81 }
82
SetupDataSource(DataSourceInstanceID,const DataSourceConfig &)83 void FakeProducer::SetupDataSource(DataSourceInstanceID,
84 const DataSourceConfig&) {
85 task_runner_->PostTask(on_setup_data_source_instance_);
86 }
87
StartDataSource(DataSourceInstanceID,const DataSourceConfig & source_config)88 void FakeProducer::StartDataSource(DataSourceInstanceID,
89 const DataSourceConfig& source_config) {
90 PERFETTO_DCHECK_THREAD(thread_checker_);
91 if (trace_writer_) {
92 // Startup tracing was already active, just bind the target buffer.
93 endpoint_->MaybeSharedMemoryArbiter()->BindStartupTargetBuffer(
94 kStartupTargetBufferReservationId,
95 static_cast<BufferID>(source_config.target_buffer()));
96 } else {
97 // Common case: Start tracing now.
98 trace_writer_ = endpoint_->CreateTraceWriter(
99 static_cast<BufferID>(source_config.target_buffer()));
100 SetupFromConfig(source_config.for_testing());
101 }
102 if (source_config.for_testing().send_batch_on_register()) {
103 ProduceEventBatch(on_create_data_source_instance_);
104 } else {
105 task_runner_->PostTask(on_create_data_source_instance_);
106 }
107 }
108
StopDataSource(DataSourceInstanceID)109 void FakeProducer::StopDataSource(DataSourceInstanceID) {
110 PERFETTO_DCHECK_THREAD(thread_checker_);
111 trace_writer_.reset();
112 }
113
114 // Note: this can be called on a different thread.
ProduceStartupEventBatch(const protos::gen::TestConfig & config,SharedMemoryArbiter * arbiter,std::function<void ()> callback)115 void FakeProducer::ProduceStartupEventBatch(
116 const protos::gen::TestConfig& config,
117 SharedMemoryArbiter* arbiter,
118 std::function<void()> callback) {
119 task_runner_->PostTask([this, config, arbiter, callback] {
120 SetupFromConfig(config);
121
122 PERFETTO_CHECK(!trace_writer_);
123 trace_writer_ =
124 arbiter->CreateStartupTraceWriter(kStartupTargetBufferReservationId);
125
126 EmitEventBatchOnTaskRunner({});
127
128 // Issue callback right after writing - cannot wait for flush yet because
129 // we're not connected yet.
130 callback();
131 });
132 }
133
134 // Note: this can be called on a different thread.
ProduceEventBatch(std::function<void ()> callback)135 void FakeProducer::ProduceEventBatch(std::function<void()> callback) {
136 task_runner_->PostTask(
137 [this, callback] { EmitEventBatchOnTaskRunner(callback); });
138 }
139
RegisterDataSource(const DataSourceDescriptor & desc)140 void FakeProducer::RegisterDataSource(const DataSourceDescriptor& desc) {
141 task_runner_->PostTask([this, desc] { endpoint_->RegisterDataSource(desc); });
142 }
143
CommitData(const CommitDataRequest & req,std::function<void ()> callback)144 void FakeProducer::CommitData(const CommitDataRequest& req,
145 std::function<void()> callback) {
146 task_runner_->PostTask(
147 [this, req, callback] { endpoint_->CommitData(req, callback); });
148 }
149
Sync(std::function<void ()> callback)150 void FakeProducer::Sync(std::function<void()> callback) {
151 task_runner_->PostTask([this, callback] { endpoint_->Sync(callback); });
152 }
153
ActivateTrigger(const std::string & trigger_name)154 void FakeProducer::ActivateTrigger(const std::string& trigger_name) {
155 task_runner_->PostTask(
156 [this, trigger_name] { endpoint_->ActivateTriggers({trigger_name}); });
157 }
158
OnTracingSetup()159 void FakeProducer::OnTracingSetup() {}
160
Flush(FlushRequestID flush_request_id,const DataSourceInstanceID *,size_t num_data_sources)161 void FakeProducer::Flush(FlushRequestID flush_request_id,
162 const DataSourceInstanceID*,
163 size_t num_data_sources) {
164 PERFETTO_DCHECK(num_data_sources > 0);
165 if (trace_writer_)
166 trace_writer_->Flush();
167 endpoint_->NotifyFlushComplete(flush_request_id);
168 }
169
unix_socket_fd()170 base::SocketHandle FakeProducer::unix_socket_fd() {
171 // Since FakeProducer is only used in tests we can include and assume the
172 // implementation.
173 auto* producer = static_cast<ProducerIPCClientImpl*>(endpoint_.get());
174 auto* ipc_client =
175 static_cast<ipc::ClientImpl*>(producer->GetClientForTesting());
176 return ipc_client->GetUnixSocketForTesting()->fd();
177 }
178
SetupFromConfig(const protos::gen::TestConfig & config)179 void FakeProducer::SetupFromConfig(const protos::gen::TestConfig& config) {
180 rnd_engine_ = std::minstd_rand0(config.seed());
181 message_count_ = config.message_count();
182 message_size_ = config.message_size();
183 max_messages_per_second_ = config.max_messages_per_second();
184 }
185
EmitEventBatchOnTaskRunner(std::function<void ()> callback)186 void FakeProducer::EmitEventBatchOnTaskRunner(std::function<void()> callback) {
187 PERFETTO_CHECK(trace_writer_);
188 PERFETTO_CHECK(message_size_ > 1);
189 std::unique_ptr<char, base::FreeDeleter> payload(
190 static_cast<char*>(malloc(message_size_)));
191 memset(payload.get(), '.', message_size_);
192 payload.get()[message_size_ - 1] = 0;
193
194 base::TimeMillis start = base::GetWallTimeMs();
195 int64_t iterations = 0;
196 uint32_t messages_to_emit = message_count_;
197 while (messages_to_emit > 0) {
198 uint32_t messages_in_minibatch =
199 max_messages_per_second_ == 0
200 ? messages_to_emit
201 : std::min(max_messages_per_second_, messages_to_emit);
202 PERFETTO_DCHECK(messages_to_emit >= messages_in_minibatch);
203
204 for (uint32_t i = 0; i < messages_in_minibatch; i++) {
205 auto handle = trace_writer_->NewTracePacket();
206 handle->set_for_testing()->set_seq_value(
207 static_cast<uint32_t>(rnd_engine_()));
208 handle->set_for_testing()->set_str(payload.get(), message_size_);
209 }
210 messages_to_emit -= messages_in_minibatch;
211 iterations++;
212
213 // Pause until the second boundary to make sure that we are adhering to
214 // the speed limitation.
215 if (max_messages_per_second_ > 0) {
216 int64_t expected_time_taken = iterations * 1000;
217 base::TimeMillis time_taken = base::GetWallTimeMs() - start;
218 while (time_taken.count() < expected_time_taken) {
219 std::this_thread::sleep_for(
220 base::TimeMillis(expected_time_taken - time_taken.count()));
221 time_taken = base::GetWallTimeMs() - start;
222 }
223 }
224 trace_writer_->Flush(messages_to_emit > 0 ? [] {} : callback);
225 }
226 }
227
228 } // namespace perfetto
229