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// Copyright 2018 The Crashpad Authors
//
// 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