143 lines
4.3 KiB
C++
143 lines
4.3 KiB
C++
// Copyright 2016 The Crashpad Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "minidump/minidump_user_stream_writer.h"
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#include "base/check_op.h"
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#include "util/file/file_writer.h"
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namespace crashpad {
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class MinidumpUserStreamWriter::ContentsWriter {
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public:
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virtual ~ContentsWriter() {}
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virtual bool WriteContents(FileWriterInterface* writer) = 0;
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virtual size_t GetSize() const = 0;
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};
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class MinidumpUserStreamWriter::SnapshotContentsWriter final
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: public MinidumpUserStreamWriter::ContentsWriter,
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public MemorySnapshot::Delegate {
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public:
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explicit SnapshotContentsWriter(const MemorySnapshot* snapshot)
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: snapshot_(snapshot), writer_(nullptr) {}
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SnapshotContentsWriter(const SnapshotContentsWriter&) = delete;
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SnapshotContentsWriter& operator=(const SnapshotContentsWriter&) = delete;
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bool WriteContents(FileWriterInterface* writer) override {
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DCHECK(!writer_);
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writer_ = writer;
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if (!snapshot_)
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return true;
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return snapshot_->Read(this);
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}
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size_t GetSize() const override { return snapshot_ ? snapshot_->Size() : 0; }
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bool MemorySnapshotDelegateRead(void* data, size_t size) override {
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return writer_->Write(data, size);
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}
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private:
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const MemorySnapshot* snapshot_;
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FileWriterInterface* writer_;
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};
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class MinidumpUserStreamWriter::ExtensionStreamContentsWriter final
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: public MinidumpUserStreamWriter::ContentsWriter,
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public MinidumpUserExtensionStreamDataSource::Delegate {
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public:
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explicit ExtensionStreamContentsWriter(
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std::unique_ptr<MinidumpUserExtensionStreamDataSource> data_source)
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: data_source_(std::move(data_source)), writer_(nullptr) {}
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ExtensionStreamContentsWriter(const ExtensionStreamContentsWriter&) = delete;
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ExtensionStreamContentsWriter& operator=(
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const ExtensionStreamContentsWriter&) = delete;
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bool WriteContents(FileWriterInterface* writer) override {
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DCHECK(!writer_);
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writer_ = writer;
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return data_source_->ReadStreamData(this);
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}
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size_t GetSize() const override { return data_source_->StreamDataSize(); }
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bool ExtensionStreamDataSourceRead(const void* data, size_t size) override {
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return writer_->Write(data, size);
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}
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private:
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std::unique_ptr<MinidumpUserExtensionStreamDataSource> data_source_;
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FileWriterInterface* writer_;
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};
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MinidumpUserStreamWriter::MinidumpUserStreamWriter() : stream_type_() {}
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MinidumpUserStreamWriter::~MinidumpUserStreamWriter() {
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}
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void MinidumpUserStreamWriter::InitializeFromSnapshot(
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const UserMinidumpStream* stream) {
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DCHECK_EQ(state(), kStateMutable);
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DCHECK(!contents_writer_.get());
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stream_type_ = static_cast<MinidumpStreamType>(stream->stream_type());
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contents_writer_ = std::make_unique<SnapshotContentsWriter>(stream->memory());
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}
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void MinidumpUserStreamWriter::InitializeFromUserExtensionStream(
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std::unique_ptr<MinidumpUserExtensionStreamDataSource> data_source) {
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DCHECK_EQ(state(), kStateMutable);
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DCHECK(!contents_writer_.get());
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stream_type_ = data_source->stream_type();
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contents_writer_ =
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std::make_unique<ExtensionStreamContentsWriter>(std::move(data_source));
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}
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bool MinidumpUserStreamWriter::Freeze() {
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DCHECK_EQ(state(), kStateMutable);
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DCHECK_NE(stream_type_, 0u);
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return MinidumpStreamWriter::Freeze();
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}
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size_t MinidumpUserStreamWriter::SizeOfObject() {
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DCHECK_GE(state(), kStateFrozen);
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return contents_writer_->GetSize();
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}
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std::vector<internal::MinidumpWritable*>
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MinidumpUserStreamWriter::Children() {
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DCHECK_GE(state(), kStateFrozen);
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return std::vector<internal::MinidumpWritable*>();
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}
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bool MinidumpUserStreamWriter::WriteObject(FileWriterInterface* file_writer) {
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DCHECK_EQ(state(), kStateWritable);
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return contents_writer_->WriteContents(file_writer);
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}
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MinidumpStreamType MinidumpUserStreamWriter::StreamType() const {
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return static_cast<MinidumpStreamType>(stream_type_);
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}
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} // namespace crashpad
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