1 /*
2  * Copyright (C) 2019 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 #ifndef SRC_TRACE_PROCESSOR_FUCHSIA_TRACE_TOKENIZER_H_
18 #define SRC_TRACE_PROCESSOR_FUCHSIA_TRACE_TOKENIZER_H_
19 
20 #include "src/trace_processor/chunked_trace_reader.h"
21 #include "src/trace_processor/fuchsia_trace_utils.h"
22 #include "src/trace_processor/trace_blob_view.h"
23 #include "src/trace_processor/trace_storage.h"
24 
25 namespace perfetto {
26 namespace trace_processor {
27 
28 class TraceProcessorContext;
29 
30 // The Fuchsia trace format is documented at
31 // https://fuchsia.googlesource.com/fuchsia/+/HEAD/docs/development/tracing/trace-format/README.md
32 class FuchsiaTraceTokenizer : public ChunkedTraceReader {
33  public:
34   explicit FuchsiaTraceTokenizer(TraceProcessorContext*);
35   ~FuchsiaTraceTokenizer() override;
36 
37   // ChunkedTraceReader implementation
38   bool Parse(std::unique_ptr<uint8_t[]>, size_t) override;
39 
40  private:
41   struct ProviderInfo {
42     std::string name;
43 
44     std::unordered_map<uint64_t, StringId> string_table;
45     std::unordered_map<uint64_t, fuchsia_trace_utils::ThreadInfo> thread_table;
46 
47     uint64_t ticks_per_second = 1000000000;
48   };
49 
50   struct RunningThread {
51     fuchsia_trace_utils::ThreadInfo info;
52     int64_t start_ts;
53   };
54 
55   void ParseRecord(TraceBlobView);
56   void RegisterProvider(uint32_t, std::string);
57 
58   TraceProcessorContext* const context_;
59   std::vector<uint8_t> leftover_bytes_;
60 
61   // Map from tid to pid. Used because in some places we do not get pid info.
62   // Fuchsia tids are never reused.
63   std::unordered_map<uint64_t, uint64_t> pid_table_;
64   std::unordered_map<uint32_t, std::unique_ptr<ProviderInfo>> providers_;
65   ProviderInfo* current_provider_;
66 
67   std::unordered_map<uint32_t, RunningThread> cpu_threads_;
68 };
69 
70 }  // namespace trace_processor
71 }  // namespace perfetto
72 
73 #endif  // SRC_TRACE_PROCESSOR_FUCHSIA_TRACE_TOKENIZER_H_
74