| /* |
| * 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 "perfetto/tracing/core/trace_packet.h" |
| |
| #include "perfetto/base/logging.h" |
| #include "perfetto/protozero/proto_utils.h" |
| #include "src/tracing/core/sliced_protobuf_input_stream.h" |
| |
| namespace perfetto { |
| |
| TracePacket::TracePacket() = default; |
| TracePacket::~TracePacket() = default; |
| |
| TracePacket::TracePacket(TracePacket&& other) noexcept { |
| *this = std::move(other); |
| } |
| |
| TracePacket& TracePacket::operator=(TracePacket&& other) { |
| slices_ = std::move(other.slices_); |
| other.slices_.clear(); |
| size_ = other.size_; |
| other.size_ = 0; |
| return *this; |
| } |
| |
| void TracePacket::AddSlice(Slice slice) { |
| size_ += slice.size; |
| slices_.push_back(std::move(slice)); |
| } |
| |
| void TracePacket::AddSlice(const void* start, size_t size) { |
| size_ += size; |
| slices_.emplace_back(start, size); |
| } |
| |
| std::tuple<char*, size_t> TracePacket::GetProtoPreamble() { |
| using protozero::proto_utils::MakeTagLengthDelimited; |
| using protozero::proto_utils::WriteVarInt; |
| uint8_t* ptr = reinterpret_cast<uint8_t*>(&preamble_[0]); |
| |
| constexpr uint8_t tag = MakeTagLengthDelimited(kPacketFieldNumber); |
| static_assert(tag < 0x80, "TracePacket tag should fit in one byte"); |
| *(ptr++) = tag; |
| |
| ptr = WriteVarInt(size(), ptr); |
| size_t preamble_size = reinterpret_cast<uintptr_t>(ptr) - |
| reinterpret_cast<uintptr_t>(&preamble_[0]); |
| PERFETTO_DCHECK(preamble_size <= sizeof(preamble_)); |
| return std::make_tuple(&preamble_[0], preamble_size); |
| } |
| |
| std::unique_ptr<TracePacket::ZeroCopyInputStream> |
| TracePacket::CreateSlicedInputStream() const { |
| return std::unique_ptr<ZeroCopyInputStream>( |
| new SlicedProtobufInputStream(&slices_)); |
| } |
| |
| } // namespace perfetto |