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74a34e9c4b
In some cases, it's sufficient to move the zero-length array to the end of the structure. When the struct is used inside a class that is derived from however, this fails. In that case, switch to holding the object in a scoped_ptr. Longer winded version: https://groups.google.com/a/chromium.org/d/msg/crashpad-dev/NGZ6LwRMORM/nKcXKQ7inIEJ R=mark@chromium.org BUG=crashpad:1 Review URL: https://codereview.chromium.org/896663006
106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
// Copyright 2014 The Crashpad Authors. All rights reserved.
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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_location_descriptor_list_writer.h"
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#include "base/logging.h"
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#include "util/file/file_writer.h"
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#include "util/numeric/safe_assignment.h"
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namespace crashpad {
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namespace internal {
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MinidumpLocationDescriptorListWriter::MinidumpLocationDescriptorListWriter()
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: MinidumpWritable(),
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location_descriptor_list_base_(new MinidumpLocationDescriptorList()),
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children_(),
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child_location_descriptors_() {
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}
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MinidumpLocationDescriptorListWriter::~MinidumpLocationDescriptorListWriter() {
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}
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void MinidumpLocationDescriptorListWriter::AddChild(
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scoped_ptr<MinidumpWritable> child) {
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DCHECK_EQ(state(), kStateMutable);
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children_.push_back(child.release());
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}
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bool MinidumpLocationDescriptorListWriter::Freeze() {
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DCHECK_EQ(state(), kStateMutable);
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DCHECK(child_location_descriptors_.empty());
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if (!MinidumpWritable::Freeze()) {
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return false;
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}
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size_t child_count = children_.size();
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if (!AssignIfInRange(&location_descriptor_list_base_->count,
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child_count)) {
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LOG(ERROR) << "child_count " << child_count << " out of range";
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return false;
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}
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child_location_descriptors_.resize(child_count);
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for (size_t index = 0; index < child_count; ++index) {
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children_[index]->RegisterLocationDescriptor(
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&child_location_descriptors_[index]);
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}
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return true;
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}
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size_t MinidumpLocationDescriptorListWriter::SizeOfObject() {
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DCHECK_GE(state(), kStateFrozen);
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return sizeof(*location_descriptor_list_base_) +
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children_.size() * sizeof(MINIDUMP_LOCATION_DESCRIPTOR);
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}
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std::vector<MinidumpWritable*>
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MinidumpLocationDescriptorListWriter::Children() {
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DCHECK_GE(state(), kStateFrozen);
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std::vector<MinidumpWritable*> children;
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for (MinidumpWritable* child : children_) {
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children.push_back(child);
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}
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return children;
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}
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bool MinidumpLocationDescriptorListWriter::WriteObject(
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FileWriterInterface* file_writer) {
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DCHECK_EQ(state(), kStateWritable);
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DCHECK_EQ(children_.size(), child_location_descriptors_.size());
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WritableIoVec iov;
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iov.iov_base = location_descriptor_list_base_.get();
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iov.iov_len = sizeof(*location_descriptor_list_base_);
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std::vector<WritableIoVec> iovecs(1, iov);
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if (!child_location_descriptors_.empty()) {
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iov.iov_base = &child_location_descriptors_[0];
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iov.iov_len = child_location_descriptors_.size() *
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sizeof(MINIDUMP_LOCATION_DESCRIPTOR);
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iovecs.push_back(iov);
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}
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return file_writer->WriteIoVec(&iovecs);
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}
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} // namespace internal
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} // namespace crashpad
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