1 /* 2 * Copyright (C) 2024 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_IMPORTERS_ARCHIVE_TAR_TRACE_READER_H_ 18 #define SRC_TRACE_PROCESSOR_IMPORTERS_ARCHIVE_TAR_TRACE_READER_H_ 19 20 #include <cstddef> 21 #include <cstdint> 22 #include <map> 23 24 #include "perfetto/base/status.h" 25 #include "perfetto/ext/base/status_or.h" 26 #include "perfetto/trace_processor/trace_blob_view.h" 27 #include "src/trace_processor/importers/archive/archive_entry.h" 28 #include "src/trace_processor/importers/common/chunked_trace_reader.h" 29 #include "src/trace_processor/tables/metadata_tables_py.h" 30 #include "src/trace_processor/util/trace_blob_view_reader.h" 31 32 namespace perfetto::trace_processor { 33 34 class TraceProcessorContext; 35 36 class TarTraceReader : public ChunkedTraceReader { 37 public: 38 explicit TarTraceReader(TraceProcessorContext*); 39 ~TarTraceReader() override; 40 41 // ChunkedTraceReader implementation 42 base::Status Parse(TraceBlobView) override; 43 base::Status NotifyEndOfFile() override; 44 45 private: 46 struct Metadata { 47 std::string name; 48 uint64_t size; 49 char type_flag; 50 }; 51 enum class ParseResult { 52 kOk, 53 kNeedsMoreData, 54 }; 55 56 struct File { 57 tables::TraceFileTable::Id id; 58 std::vector<TraceBlobView> data; 59 }; 60 61 enum class State { kMetadata, kContent, kZeroMetadata, kDone }; 62 63 base::StatusOr<ParseResult> ParseMetadata(); 64 base::StatusOr<ParseResult> ParseContent(); 65 base::StatusOr<ParseResult> ParseLongName(); 66 base::StatusOr<ParseResult> ParsePadding(); 67 68 void AddFile(const Metadata& metadata, 69 TraceBlobView header, 70 std::vector<TraceBlobView> data); 71 72 TraceProcessorContext* const context_; 73 State state_{State::kMetadata}; 74 util::TraceBlobViewReader buffer_; 75 std::optional<Metadata> metadata_; 76 std::optional<std::string> long_name_; 77 std::map<ArchiveEntry, File> ordered_files_; 78 }; 79 80 } // namespace perfetto::trace_processor 81 82 #endif // SRC_TRACE_PROCESSOR_IMPORTERS_ARCHIVE_TAR_TRACE_READER_H_ 83