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diff --git a/externals/breakpad/src/common/dwarf_range_list_handler.h b/externals/breakpad/src/common/dwarf_range_list_handler.h
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+// -*- mode: c++ -*-
+
+// Copyright 2018 Google LLC
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Original author: Gabriele Svelto <gsvelto@mozilla.com>
+//                                  <gabriele.svelto@gmail.com>
+
+// The DwarfRangeListHandler class accepts rangelist data from a DWARF parser
+// and adds it to a google_breakpad::Function or other objects supporting
+// ranges.
+
+#ifndef COMMON_LINUX_DWARF_RANGE_LIST_HANDLER_H
+#define COMMON_LINUX_DWARF_RANGE_LIST_HANDLER_H
+
+#include <vector>
+
+#include "common/module.h"
+#include "common/dwarf/dwarf2reader.h"
+
+namespace google_breakpad {
+
+// A class for producing a vector of google_breakpad::Module::Range
+// instances from a parsed DWARF range list.
+
+class DwarfRangeListHandler: public RangeListHandler {
+ public:
+  DwarfRangeListHandler(vector<Module::Range>* ranges)
+      : ranges_(ranges) { }
+
+  ~DwarfRangeListHandler() { }
+
+  // Add a range to the list
+  void AddRange(uint64_t begin, uint64_t end);
+
+  // Sort the ranges so that they are in ascending order of starting address
+  void Finish();
+
+ private:
+  // The list of ranges to be populated
+  vector<Module::Range>* ranges_;
+};
+
+} // namespace google_breakpad
+
+#endif // COMMON_LINUX_DWARF_RANGE_LIST_HANDLER_H