| // Copyright 2018 The Crashpad Authors. All rights reserved. |
| // |
| // 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 "snapshot/minidump/memory_snapshot_minidump.h" |
| |
| #include <memory> |
| |
| #include "base/numerics/safe_math.h" |
| |
| namespace crashpad { |
| namespace internal { |
| |
| MemorySnapshotMinidump::MemorySnapshotMinidump() |
| : MemorySnapshot(), |
| address_(0), |
| data_(), |
| initialized_() {} |
| |
| MemorySnapshotMinidump::~MemorySnapshotMinidump() {} |
| |
| bool MemorySnapshotMinidump::Initialize(FileReaderInterface* file_reader, |
| RVA location) { |
| INITIALIZATION_STATE_SET_INITIALIZING(initialized_); |
| |
| MINIDUMP_MEMORY_DESCRIPTOR descriptor; |
| |
| if (!file_reader->SeekSet(location)) { |
| return false; |
| } |
| |
| if (!file_reader->ReadExactly(&descriptor, sizeof(descriptor))) { |
| return false; |
| } |
| |
| address_ = descriptor.StartOfMemoryRange; |
| data_.resize(descriptor.Memory.DataSize); |
| |
| if (!file_reader->SeekSet(descriptor.Memory.Rva)) { |
| return false; |
| } |
| |
| if (!file_reader->ReadExactly(data_.data(), data_.size())) { |
| return false; |
| } |
| |
| INITIALIZATION_STATE_SET_VALID(initialized_); |
| return true; |
| } |
| |
| uint64_t MemorySnapshotMinidump::Address() const { |
| INITIALIZATION_STATE_DCHECK_VALID(initialized_); |
| return address_; |
| } |
| |
| size_t MemorySnapshotMinidump::Size() const { |
| INITIALIZATION_STATE_DCHECK_VALID(initialized_); |
| return data_.size(); |
| } |
| |
| bool MemorySnapshotMinidump::Read(Delegate* delegate) const { |
| INITIALIZATION_STATE_DCHECK_VALID(initialized_); |
| return delegate->MemorySnapshotDelegateRead( |
| const_cast<uint8_t*>(data_.data()), data_.size()); |
| } |
| |
| const MemorySnapshot* MemorySnapshotMinidump::MergeWithOtherSnapshot( |
| const MemorySnapshot* other) const { |
| INITIALIZATION_STATE_DCHECK_VALID(initialized_); |
| |
| // TODO: Verify type of other |
| auto other_cast = reinterpret_cast<const MemorySnapshotMinidump*>(other); |
| |
| INITIALIZATION_STATE_DCHECK_VALID(other_cast->initialized_); |
| |
| if (other_cast->address_ < address_) { |
| return other_cast->MergeWithOtherSnapshot(this); |
| } |
| |
| CheckedRange<uint64_t, size_t> merged(0, 0); |
| if (!LoggingDetermineMergedRange(this, other, &merged)) { |
| return nullptr; |
| } |
| |
| auto result = std::make_unique<MemorySnapshotMinidump>(); |
| result->address_ = merged.base(); |
| result->data_ = data_; |
| |
| if (result->data_.size() == merged.size()) { |
| return result.release(); |
| } |
| |
| result->data_.resize( |
| base::checked_cast<size_t>(other_cast->address_ - address_)); |
| result->data_.insert(result->data_.end(), other_cast->data_.begin(), |
| other_cast->data_.end()); |
| return result.release(); |
| } |
| |
| } // namespace internal |
| } // namespace crashpad |