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/*
* Copyright (C) 2018 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.
*/
#ifndef SRC_TRACE_PROCESSOR_IMPORTERS_PROTO_PROTO_TRACE_TOKENIZER_H_
#define SRC_TRACE_PROCESSOR_IMPORTERS_PROTO_PROTO_TRACE_TOKENIZER_H_
#include <stdint.h>
#include <memory>
#include <vector>
#include "src/trace_processor/chunked_trace_reader.h"
#include "src/trace_processor/importers/proto/proto_incremental_state.h"
#include "src/trace_processor/trace_blob_view.h"
namespace protozero {
struct ConstBytes;
}
namespace perfetto {
namespace protos {
namespace pbzero {
class TracePacket_Decoder;
} // namespace pbzero
} // namespace protos
namespace trace_processor {
class PacketSequenceState;
class TraceProcessorContext;
class TraceSorter;
class TraceStorage;
// Reads a protobuf trace in chunks and extracts boundaries of trace packets
// (or subfields, for the case of ftrace) with their timestamps.
class ProtoTraceTokenizer : public ChunkedTraceReader {
public:
// |reader| is the abstract method of getting chunks of size |chunk_size_b|
// from a trace file with these chunks parsed into |trace|.
explicit ProtoTraceTokenizer(TraceProcessorContext*);
~ProtoTraceTokenizer() override;
// ChunkedTraceReader implementation.
util::Status Parse(std::unique_ptr<uint8_t[]>, size_t size) override;
private:
using ConstBytes = protozero::ConstBytes;
util::Status ParseInternal(std::unique_ptr<uint8_t[]> owned_buf,
uint8_t* data,
size_t size);
util::Status ParsePacket(TraceBlobView);
util::Status ParseClockSnapshot(ConstBytes blob, uint32_t seq_id);
void HandleIncrementalStateCleared(
const protos::pbzero::TracePacket_Decoder&);
void HandlePreviousPacketDropped(const protos::pbzero::TracePacket_Decoder&);
void ParseTracePacketDefaults(const protos::pbzero::TracePacket_Decoder&,
TraceBlobView trace_packet_defaults);
void ParseInternedData(const protos::pbzero::TracePacket_Decoder&,
TraceBlobView interned_data);
PacketSequenceState* GetIncrementalStateForPacketSequence(
uint32_t sequence_id) {
if (!incremental_state)
incremental_state.reset(new ProtoIncrementalState(context_));
return incremental_state->GetOrCreateStateForPacketSequence(sequence_id);
}
TraceProcessorContext* context_;
// Used to glue together trace packets that span across two (or more)
// Parse() boundaries.
std::vector<uint8_t> partial_buf_;
// Temporary. Currently trace packets do not have a timestamp, so the
// timestamp given is latest_timestamp_.
int64_t latest_timestamp_ = 0;
// Stores incremental state and references to interned data, e.g. for track
// event protos.
std::unique_ptr<ProtoIncrementalState> incremental_state;
};
} // namespace trace_processor
} // namespace perfetto
#endif // SRC_TRACE_PROCESSOR_IMPORTERS_PROTO_PROTO_TRACE_TOKENIZER_H_
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