| /* |
| * Copyright (C) 2017 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 <fstream> |
| #include <sstream> |
| |
| #include "ftrace_procfs.h" |
| #include "ftrace_reader/ftrace_controller.h" |
| #include "gmock/gmock.h" |
| #include "google/protobuf/text_format.h" |
| #include "gtest/gtest.h" |
| #include "perfetto_base/unix_task_runner.h" |
| #include "protozero/scattered_stream_writer.h" |
| #include "scattered_stream_delegate_for_testing.h" |
| |
| #include "protos/ftrace/ftrace_event_bundle.pb.h" |
| #include "protos/ftrace/ftrace_event_bundle.pbzero.h" |
| #include "protos/ftrace/test_bundle_wrapper.pb.h" |
| #include "protos/ftrace/test_bundle_wrapper.pbzero.h" |
| |
| using testing::HasSubstr; |
| using testing::Not; |
| |
| namespace perfetto { |
| namespace { |
| |
| const size_t kPageSize = 4096; |
| |
| const char kTracingPath[] = "/sys/kernel/debug/tracing/"; |
| |
| using BundleHandle = |
| protozero::ProtoZeroMessageHandle<protos::pbzero::FtraceEventBundle>; |
| |
| class EndToEndIntegrationTest : public ::testing::Test, |
| public FtraceSink::Delegate { |
| public: |
| void Finalize(protos::TestBundleWrapper* wrapper) { |
| message->set_after("--- Bundle wrapper after ---"); |
| PERFETTO_CHECK(message); |
| size_t msg_size = message->Finalize(); |
| std::unique_ptr<uint8_t[]> buffer = writer_delegate->StitchChunks(msg_size); |
| wrapper->ParseFromArray(buffer.get(), static_cast<int>(msg_size)); |
| message.reset(); |
| } |
| |
| protected: |
| virtual void SetUp() { |
| writer_delegate = std::unique_ptr<ScatteredStreamDelegateForTesting>( |
| new ScatteredStreamDelegateForTesting(kPageSize * 100)); |
| writer = std::unique_ptr<protozero::ScatteredStreamWriter>( |
| new protozero::ScatteredStreamWriter(writer_delegate.get())); |
| writer_delegate->set_writer(writer.get()); |
| message = std::unique_ptr<protos::pbzero::TestBundleWrapper>( |
| new protos::pbzero::TestBundleWrapper); |
| message->Reset(writer.get()); |
| message->set_before("--- Bundle wrapper before ---"); |
| } |
| |
| virtual BundleHandle GetBundleForCpu(size_t cpu) { |
| PERFETTO_CHECK(!currently_writing_); |
| currently_writing_ = true; |
| cpu_being_written_ = cpu; |
| return BundleHandle(message->add_bundle()); |
| } |
| |
| virtual void OnBundleComplete(size_t cpu, BundleHandle bundle) { |
| PERFETTO_CHECK(currently_writing_); |
| currently_writing_ = false; |
| EXPECT_EQ(cpu_being_written_, cpu); |
| if (!count--) |
| runner_.Quit(); |
| } |
| |
| base::UnixTaskRunner* runner() { return &runner_; } |
| |
| private: |
| size_t count = 3; |
| base::UnixTaskRunner runner_; |
| bool currently_writing_ = false; |
| size_t cpu_being_written_ = 9999; |
| std::unique_ptr<ScatteredStreamDelegateForTesting> writer_delegate = nullptr; |
| std::unique_ptr<protozero::ScatteredStreamWriter> writer = nullptr; |
| std::unique_ptr<protos::pbzero::TestBundleWrapper> message = nullptr; |
| }; |
| |
| } // namespace |
| |
| TEST_F(EndToEndIntegrationTest, SchedSwitchAndPrint) { |
| FtraceProcfs procfs(kTracingPath); |
| procfs.ClearTrace(); |
| procfs.WriteTraceMarker("Hello, World!"); |
| |
| // Create a sink listening for our favorite events: |
| std::unique_ptr<FtraceController> ftrace = FtraceController::Create(runner()); |
| FtraceConfig config(std::set<std::string>({"print", "sched_switch"})); |
| std::unique_ptr<FtraceSink> sink = ftrace->CreateSink(config, this); |
| |
| // Let some events build up. |
| sleep(1); |
| |
| // Start watching pipe fds. |
| ftrace->Start(); |
| |
| // Start processing the tasks (OnBundleComplete will quit the task runner). |
| runner()->Run(); |
| |
| // Stop listening to fds. |
| ftrace->Stop(); |
| |
| // Disable events. |
| sink.reset(); |
| |
| // Read the output into a full proto so we can use reflection. |
| protos::TestBundleWrapper output; |
| Finalize(&output); |
| |
| // Check we can see the guards: |
| EXPECT_THAT(output.before(), HasSubstr("before")); |
| EXPECT_THAT(output.after(), HasSubstr("after")); |
| |
| std::string output_as_text; |
| google::protobuf::TextFormat::PrintToString(output, &output_as_text); |
| printf("%s\n", output_as_text.c_str()); |
| } |
| |
| } // namespace perfetto |