| /* |
| * Copyright (C) 2019 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 "src/trace_processor/importers/gzip/gzip_trace_parser.h" |
| |
| #include <string> |
| |
| #include "perfetto/base/logging.h" |
| #include "perfetto/ext/base/string_utils.h" |
| #include "perfetto/ext/base/string_view.h" |
| #include "perfetto/trace_processor/trace_blob_view.h" |
| #include "src/trace_processor/forwarding_trace_parser.h" |
| #include "src/trace_processor/util/gzip_utils.h" |
| #include "src/trace_processor/util/status_macros.h" |
| |
| namespace perfetto { |
| namespace trace_processor { |
| |
| namespace { |
| |
| using ResultCode = util::GzipDecompressor::ResultCode; |
| |
| } // namespace |
| |
| GzipTraceParser::GzipTraceParser(TraceProcessorContext* context) |
| : context_(context) {} |
| |
| GzipTraceParser::GzipTraceParser(std::unique_ptr<ChunkedTraceReader> reader) |
| : context_(nullptr), inner_(std::move(reader)) {} |
| |
| GzipTraceParser::~GzipTraceParser() = default; |
| |
| util::Status GzipTraceParser::Parse(TraceBlobView blob) { |
| return ParseUnowned(blob.data(), blob.size()); |
| } |
| |
| util::Status GzipTraceParser::ParseUnowned(const uint8_t* data, size_t size) { |
| const uint8_t* start = data; |
| size_t len = size; |
| |
| if (!inner_) { |
| PERFETTO_CHECK(context_); |
| inner_.reset(new ForwardingTraceParser(context_)); |
| } |
| |
| if (!first_chunk_parsed_) { |
| // .ctrace files begin with: "TRACE:\n" or "done. TRACE:\n" strip this if |
| // present. |
| base::StringView beginning(reinterpret_cast<const char*>(start), size); |
| |
| static const char* kSystraceFileHeader = "TRACE:\n"; |
| size_t offset = Find(kSystraceFileHeader, beginning); |
| if (offset != std::string::npos) { |
| start += strlen(kSystraceFileHeader) + offset; |
| len -= strlen(kSystraceFileHeader) + offset; |
| } |
| first_chunk_parsed_ = true; |
| } |
| |
| // Our default uncompressed buffer size is 32MB as it allows for good |
| // throughput. |
| constexpr size_t kUncompressedBufferSize = 32 * 1024 * 1024; |
| |
| needs_more_input_ = false; |
| decompressor_.Feed(start, len); |
| |
| for (auto ret = ResultCode::kOk; ret != ResultCode::kEof;) { |
| if (!buffer_) { |
| buffer_.reset(new uint8_t[kUncompressedBufferSize]); |
| bytes_written_ = 0; |
| } |
| |
| auto result = |
| decompressor_.ExtractOutput(buffer_.get() + bytes_written_, |
| kUncompressedBufferSize - bytes_written_); |
| ret = result.ret; |
| if (ret == ResultCode::kError) |
| return util::ErrStatus("Failed to decompress trace chunk"); |
| |
| if (ret == ResultCode::kNeedsMoreInput) { |
| PERFETTO_DCHECK(result.bytes_written == 0); |
| needs_more_input_ = true; |
| return util::OkStatus(); |
| } |
| bytes_written_ += result.bytes_written; |
| |
| if (bytes_written_ == kUncompressedBufferSize || ret == ResultCode::kEof) { |
| TraceBlob blob = |
| TraceBlob::TakeOwnership(std::move(buffer_), bytes_written_); |
| RETURN_IF_ERROR(inner_->Parse(TraceBlobView(std::move(blob)))); |
| } |
| } |
| return util::OkStatus(); |
| } |
| |
| void GzipTraceParser::NotifyEndOfFile() { |
| // TODO(lalitm): this should really be an error returned to the caller but |
| // due to historical implementation, NotifyEndOfFile does not return a |
| // util::Status. |
| PERFETTO_DCHECK(!needs_more_input_); |
| PERFETTO_DCHECK(!buffer_); |
| |
| if (inner_) |
| inner_->NotifyEndOfFile(); |
| } |
| |
| } // namespace trace_processor |
| } // namespace perfetto |