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 "src/tracing/core/trace_writer_for_testing.h" 18 19 #include "perfetto/base/logging.h" 20 #include "perfetto/base/utils.h" 21 22 #include "perfetto/protozero/message.h" 23 24 #include "perfetto/trace/trace_packet.pbzero.h" 25 26 namespace perfetto { 27 28 TraceWriterForTesting::TraceWriterForTesting() 29 : delegate_(static_cast<size_t>(base::kPageSize)), stream_(&delegate_) { 30 delegate_.set_writer(&stream_); 31 cur_packet_.reset(new protos::pbzero::TracePacket()); 32 cur_packet_->Finalize(); // To avoid the DCHECK in NewTracePacket(). 33 } 34 35 TraceWriterForTesting::~TraceWriterForTesting() {} 36 37 void TraceWriterForTesting::Flush(std::function<void()> callback) { 38 // Flush() cannot be called in the middle of a TracePacket. 39 PERFETTO_CHECK(cur_packet_->is_finalized()); 40 41 if (callback) 42 callback(); 43 } 44 45 std::unique_ptr<protos::TracePacket> TraceWriterForTesting::ParseProto() { 46 PERFETTO_CHECK(cur_packet_->is_finalized()); 47 size_t chunk_size_ = base::kPageSize; 48 auto packet = std::unique_ptr<protos::TracePacket>(new protos::TracePacket()); 49 size_t msg_size = 50 delegate_.chunks().size() * chunk_size_ - stream_.bytes_available(); 51 std::unique_ptr<uint8_t[]> buffer = delegate_.StitchChunks(msg_size); 52 if (!packet->ParseFromArray(buffer.get(), static_cast<int>(msg_size))) 53 return nullptr; 54 return packet; 55 } 56 57 TraceWriterForTesting::TracePacketHandle 58 TraceWriterForTesting::NewTracePacket() { 59 // If we hit this, the caller is calling NewTracePacket() without having 60 // finalized the previous packet. 61 PERFETTO_DCHECK(cur_packet_->is_finalized()); 62 cur_packet_->Reset(&stream_); 63 return TraceWriter::TracePacketHandle(cur_packet_.get()); 64 } 65 66 WriterID TraceWriterForTesting::writer_id() const { 67 return 0; 68 } 69 70 } // namespace perfetto 71
