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// Copyright 2014 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 "minidump/minidump_exception_writer.h"
#include <utility>
#include "base/logging.h"
#include "base/numerics/safe_conversions.h"
#include "minidump/minidump_context_writer.h"
#include "snapshot/exception_snapshot.h"
#include "util/file/file_writer.h"
#include "util/misc/arraysize.h"
namespace crashpad {
MinidumpExceptionWriter::MinidumpExceptionWriter()
: MinidumpStreamWriter(), exception_(), context_(nullptr) {
}
MinidumpExceptionWriter::~MinidumpExceptionWriter() {
}
void MinidumpExceptionWriter::InitializeFromSnapshot(
const ExceptionSnapshot* exception_snapshot,
const MinidumpThreadIDMap& thread_id_map) {
DCHECK_EQ(state(), kStateMutable);
DCHECK(!context_);
auto thread_id_it = thread_id_map.find(exception_snapshot->ThreadID());
DCHECK(thread_id_it != thread_id_map.end());
SetThreadID(thread_id_it->second);
SetExceptionCode(exception_snapshot->Exception());
SetExceptionFlags(exception_snapshot->ExceptionInfo());
SetExceptionAddress(exception_snapshot->ExceptionAddress());
SetExceptionInformation(exception_snapshot->Codes());
std::unique_ptr<MinidumpContextWriter> context =
MinidumpContextWriter::CreateFromSnapshot(exception_snapshot->Context());
SetContext(std::move(context));
}
void MinidumpExceptionWriter::SetContext(
std::unique_ptr<MinidumpContextWriter> context) {
DCHECK_EQ(state(), kStateMutable);
context_ = std::move(context);
}
void MinidumpExceptionWriter::SetExceptionInformation(
const std::vector<uint64_t>& exception_information) {
DCHECK_EQ(state(), kStateMutable);
const size_t parameters = exception_information.size();
constexpr size_t kMaxParameters =
ArraySize(exception_.ExceptionRecord.ExceptionInformation);
CHECK_LE(parameters, kMaxParameters);
exception_.ExceptionRecord.NumberParameters =
base::checked_cast<uint32_t>(parameters);
size_t parameter = 0;
for (; parameter < parameters; ++parameter) {
exception_.ExceptionRecord.ExceptionInformation[parameter] =
exception_information[parameter];
}
for (; parameter < kMaxParameters; ++parameter) {
exception_.ExceptionRecord.ExceptionInformation[parameter] = 0;
}
}
bool MinidumpExceptionWriter::Freeze() {
DCHECK_EQ(state(), kStateMutable);
CHECK(context_);
if (!MinidumpStreamWriter::Freeze()) {
return false;
}
context_->RegisterLocationDescriptor(&exception_.ThreadContext);
return true;
}
size_t MinidumpExceptionWriter::SizeOfObject() {
DCHECK_GE(state(), kStateFrozen);
return sizeof(exception_);
}
std::vector<internal::MinidumpWritable*> MinidumpExceptionWriter::Children() {
DCHECK_GE(state(), kStateFrozen);
DCHECK(context_);
std::vector<MinidumpWritable*> children;
children.push_back(context_.get());
return children;
}
bool MinidumpExceptionWriter::WriteObject(FileWriterInterface* file_writer) {
DCHECK_EQ(state(), kStateWritable);
return file_writer->Write(&exception_, sizeof(exception_));
}
MinidumpStreamType MinidumpExceptionWriter::StreamType() const {
return kMinidumpStreamTypeException;
}
} // namespace crashpad