1 /*
2 * Copyright (C) 2020 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/trace_processor/importers/proto/packet_sequence_state.h"
18
19 namespace perfetto {
20 namespace trace_processor {
21
InternMessage(uint32_t field_id,TraceBlobView message)22 void PacketSequenceStateGeneration::InternMessage(uint32_t field_id,
23 TraceBlobView message) {
24 constexpr auto kIidFieldNumber = 1;
25
26 uint64_t iid = 0;
27 auto message_start = message.data();
28 auto message_size = message.length();
29 protozero::ProtoDecoder decoder(message_start, message_size);
30
31 auto field = decoder.FindField(kIidFieldNumber);
32 if (PERFETTO_UNLIKELY(!field)) {
33 PERFETTO_DLOG("Interned message without interning_id");
34 state_->context()->storage->IncrementStats(
35 stats::interned_data_tokenizer_errors);
36 return;
37 }
38 iid = field.as_uint64();
39
40 auto res = interned_data_[field_id].emplace(
41 iid, InternedMessageView(std::move(message)));
42
43 // If a message with this ID is already interned in the same generation,
44 // its data should not have changed (this is forbidden by the InternedData
45 // proto).
46 // TODO(eseckler): This DCHECK assumes that the message is encoded the
47 // same way if it is re-emitted.
48 PERFETTO_DCHECK(res.second ||
49 (res.first->second.message().length() == message_size &&
50 memcmp(res.first->second.message().data(), message_start,
51 message_size) == 0));
52 }
53
54 } // namespace trace_processor
55 } // namespace perfetto
56