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third_party/crashpad/crashpad/minidump/minidump_handle_writer.cc

Index: third_party/crashpad/crashpad/minidump/minidump_handle_writer.cc
diff --git a/third_party/crashpad/crashpad/minidump/minidump_handle_writer.cc b/third_party/crashpad/crashpad/minidump/minidump_handle_writer.cc
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index 0000000000000000000000000000000000000000..73eeb0c7c9ea6c83671e73315501fb06c7269a9b
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+++ b/third_party/crashpad/crashpad/minidump/minidump_handle_writer.cc
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+// Copyright 2015 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_handle_writer.h"
+
+#include <string>
+
+#include "base/logging.h"
+#include "base/stl_util.h"
+#include "minidump/minidump_extensions.h"
+#include "util/file/file_writer.h"
+#include "util/numeric/safe_assignment.h"
+
+namespace crashpad {
+
+MinidumpHandleDataWriter::MinidumpHandleDataWriter()
+    : handle_data_stream_base_(), handle_descriptors_(), strings_() {
+}
+
+MinidumpHandleDataWriter::~MinidumpHandleDataWriter() {
+  STLDeleteContainerPairSecondPointers(strings_.begin(), strings_.end());
+}
+
+void MinidumpHandleDataWriter::InitializeFromSnapshot(
+    const std::vector<HandleSnapshot>& handle_snapshots) {
+  DCHECK_EQ(state(), kStateMutable);
+
+  DCHECK(handle_descriptors_.empty());
+  // Because we RegisterRVA() on the string writer below, we preallocate and
+  // never resize the handle_descriptors_ vector.
+  handle_descriptors_.resize(handle_snapshots.size());
+  for (size_t i = 0; i < handle_snapshots.size(); ++i) {
+    const HandleSnapshot& handle_snapshot = handle_snapshots[i];
+    MINIDUMP_HANDLE_DESCRIPTOR& descriptor = handle_descriptors_[i];
+
+    descriptor.Handle = handle_snapshot.handle;
+
+    if (handle_snapshot.type_name.empty()) {
+      descriptor.TypeNameRva = 0;
+    } else {
+      auto it = strings_.lower_bound(handle_snapshot.type_name);
+      internal::MinidumpUTF16StringWriter* writer;
+      if (it != strings_.end() && it->first == handle_snapshot.type_name) {
+        writer = it->second;
+      } else {
+        writer = new internal::MinidumpUTF16StringWriter();
+        strings_.insert(it, std::make_pair(handle_snapshot.type_name, writer));
+        writer->SetUTF8(handle_snapshot.type_name);
+      }
+      writer->RegisterRVA(&descriptor.TypeNameRva);
+    }
+
+    descriptor.ObjectNameRva = 0;
+    descriptor.Attributes = handle_snapshot.attributes;
+    descriptor.GrantedAccess = handle_snapshot.granted_access;
+    descriptor.HandleCount = handle_snapshot.handle_count;
+    descriptor.PointerCount = handle_snapshot.pointer_count;
+  }
+}
+
+bool MinidumpHandleDataWriter::Freeze() {
+  DCHECK_EQ(state(), kStateMutable);
+
+  if (!MinidumpStreamWriter::Freeze())
+    return false;
+
+  handle_data_stream_base_.SizeOfHeader = sizeof(handle_data_stream_base_);
+  handle_data_stream_base_.SizeOfDescriptor = sizeof(handle_descriptors_[0]);
+  const size_t handle_count = handle_descriptors_.size();
+  if (!AssignIfInRange(&handle_data_stream_base_.NumberOfDescriptors,
+                       handle_count)) {
+    LOG(ERROR) << "handle_count " << handle_count << " out of range";
+    return false;
+  }
+  handle_data_stream_base_.Reserved = 0;
+
+  return true;
+}
+
+size_t MinidumpHandleDataWriter::SizeOfObject() {
+  DCHECK_GE(state(), kStateFrozen);
+  return sizeof(handle_data_stream_base_) +
+         sizeof(handle_descriptors_[0]) * handle_descriptors_.size();
+}
+
+std::vector<internal::MinidumpWritable*> MinidumpHandleDataWriter::Children() {
+  DCHECK_GE(state(), kStateFrozen);
+
+  std::vector<MinidumpWritable*> children;
+  for (const auto& pair : strings_)
+    children.push_back(pair.second);
+  return children;
+}
+
+bool MinidumpHandleDataWriter::WriteObject(FileWriterInterface* file_writer) {
+  DCHECK_EQ(state(), kStateWritable);
+
+  WritableIoVec iov;
+  iov.iov_base = &handle_data_stream_base_;
+  iov.iov_len = sizeof(handle_data_stream_base_);
+  std::vector<WritableIoVec> iovecs(1, iov);
+
+  for (const auto& descriptor : handle_descriptors_) {
+    iov.iov_base = &descriptor;
+    iov.iov_len = sizeof(descriptor);
+    iovecs.push_back(iov);
+  }
+
+  return file_writer->WriteIoVec(&iovecs);
+}
+
+MinidumpStreamType MinidumpHandleDataWriter::StreamType() const {
+  return kMinidumpStreamTypeHandleData;
+}
+
+}  // namespace crashpad