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diff --git a/utils/stacktrace.hpp b/utils/stacktrace.hpp
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+// Copyright 2012 The Kyua Authors.
+// All rights reserved.
+//
+// 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 Inc. 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.
+
+/// \file utils/stacktrace.hpp
+/// Utilities to gather a stacktrace of a crashing binary.
+
+#if !defined(ENGINE_STACKTRACE_HPP)
+#define ENGINE_STACKTRACE_HPP
+
+#include <ostream>
+
+#include "utils/datetime_fwd.hpp"
+#include "utils/fs/path_fwd.hpp"
+#include "utils/optional_fwd.hpp"
+#include "utils/process/executor_fwd.hpp"
+#include "utils/process/status_fwd.hpp"
+
+namespace utils {
+
+
+extern const char* builtin_gdb;
+extern utils::datetime::delta gdb_timeout;
+
+utils::optional< utils::fs::path > find_gdb(void);
+
+utils::optional< utils::fs::path > find_core(const utils::fs::path&,
+                                             const utils::process::status&,
+                                             const utils::fs::path&);
+
+bool unlimit_core_size(void);
+
+void dump_stacktrace(const utils::fs::path&,
+                     utils::process::executor::executor_handle&,
+                     const utils::process::executor::exit_handle&);
+
+void dump_stacktrace_if_available(const utils::fs::path&,
+                                  utils::process::executor::executor_handle&,
+                                  const utils::process::executor::exit_handle&);
+
+
+}  // namespace utils
+
+#endif  // !defined(ENGINE_STACKTRACE_HPP)