win: fixes for Windows x64

minidump/minidump_module_writer.cc

 // 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_module_writer.h"
 
 #include <sys/types.h>
 
 #include <limits>
 
 #include "base/logging.h"
+#include "base/numerics/safe_conversions.h"
 #include "minidump/minidump_string_writer.h"
 #include "minidump/minidump_writer_util.h"
 #include "snapshot/module_snapshot.h"
 #include "util/file/file_writer.h"
 #include "util/numeric/in_range_cast.h"
 #include "util/numeric/safe_assignment.h"
 
 namespace crashpad {
 
 MinidumpModuleCodeViewRecordWriter::~MinidumpModuleCodeViewRecordWriter() {
@@ skipping 115 matching lines @@
 bool MinidumpModuleMiscDebugRecordWriter::Freeze() {
   DCHECK_EQ(state(), kStateMutable);
 
   if (!MinidumpWritable::Freeze()) {
     return false;
   }
 
   // NUL-terminate.
   if (!image_debug_misc_.Unicode) {
     DCHECK(data_utf16_.empty());
-    image_debug_misc_.Length = offsetof(decltype(image_debug_misc_), Data) +
-                               (data_.size() + 1) * sizeof(data_[0]);
+    image_debug_misc_.Length = base::checked_cast<uint32_t>(
+        offsetof(decltype(image_debug_misc_), Data) +
+        (data_.size() + 1) * sizeof(data_[0]));
   } else {
     DCHECK(data_.empty());
-    image_debug_misc_.Length =
+    image_debug_misc_.Length = base::checked_cast<uint32_t>(
         offsetof(decltype(image_debug_misc_), Data) +
-        (data_utf16_.size() + 1) * sizeof(data_utf16_[0]);
+        (data_utf16_.size() + 1) * sizeof(data_utf16_[0]));
   }
 
   return true;
 }
 
 size_t MinidumpModuleMiscDebugRecordWriter::SizeOfObject() {
   DCHECK_GE(state(), kStateFrozen);
 
   return image_debug_misc_.Length;
 }
@@ skipping 274 matching lines @@
   }
 
   return file_writer->WriteIoVec(&iovecs);
 }
 
 MinidumpStreamType MinidumpModuleListWriter::StreamType() const {
   return kMinidumpStreamTypeModuleList;
 }
 
 }  // namespace crashpad