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diff --git a/libstdc++-v3/include/profile/impl/profiler_node.h b/libstdc++-v3/include/profile/impl/profiler_node.h
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+++ b/libstdc++-v3/include/profile/impl/profiler_node.h
@@ -0,0 +1,166 @@
+// -*- C++ -*-
+//
+// Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+/** @file profile/impl/profiler_node.h
+ * @brief Data structures to represent a single profiling event.
+ */
+
+// Written by Lixia Liu and Silvius Rus.
+
+#ifndef _GLIBCXX_PROFILE_PROFILER_NODE_H
+#define _GLIBCXX_PROFILE_PROFILER_NODE_H 1
+
+#include <cstdio> // FILE, fprintf
+
+#include <vector>
+#if defined _GLIBCXX_HAVE_EXECINFO_H
+#include <execinfo.h>
+#endif
+
+namespace __gnu_profile
+{
+ typedef const void* __object_t;
+ typedef void* __instruction_address_t;
+ typedef std::_GLIBCXX_STD_C::vector<__instruction_address_t> __stack_npt;
+ typedef __stack_npt* __stack_t;
+
+ std::size_t __stack_max_depth();
+
+ inline __stack_t
+ __get_stack()
+ {
+#if defined _GLIBCXX_HAVE_EXECINFO_H
+ std::size_t __max_depth = __stack_max_depth();
+ if (__max_depth == 0)
+ return 0;
+ __stack_npt __buffer(__max_depth);
+ int __depth = backtrace(&__buffer[0], __max_depth);
+ __stack_t __stack = new __stack_npt(__depth);
+ __builtin_memcpy(&(*__stack)[0], &__buffer[0],
+ __depth * sizeof(__object_t));
+ return __stack;
+#else
+ return 0;
+#endif
+ }
+
+ inline std::size_t
+ __size(__stack_t __stack)
+ {
+ if (!__stack)
+ return 0;
+ else
+ return __stack->size();
+ }
+
+ // XXX
+ inline void
+ __write(FILE* __f, __stack_t __stack)
+ {
+ if (!__stack)
+ return;
+
+ __stack_npt::const_iterator __it;
+ for (__it = __stack->begin(); __it != __stack->end(); ++__it)
+ std::fprintf(__f, "%p ", *__it);
+ }
+
+ /** @brief Hash function for summary trace using call stack as index. */
+ class __stack_hash
+ {
+ public:
+ std::size_t
+ operator()(__stack_t __s) const
+ {
+ if (!__s)
+ return 0;
+
+ __UINTPTR_TYPE__ __index = 0;
+ __stack_npt::const_iterator __it;
+ for (__it = __s->begin(); __it != __s->end(); ++__it)
+ __index += reinterpret_cast<__UINTPTR_TYPE__>(*__it);
+ return __index;
+ }
+
+ bool operator() (__stack_t __stack1, __stack_t __stack2) const
+ {
+ if (!__stack1 && !__stack2)
+ return true;
+ if (!__stack1 || !__stack2)
+ return false;
+ if (__stack1->size() != __stack2->size())
+ return false;
+
+ std::size_t __byte_size
+ = __stack1->size() * sizeof(__stack_npt::value_type);
+ return __builtin_memcmp(&(*__stack1)[0], &(*__stack2)[0],
+ __byte_size) == 0;
+ }
+ };
+
+
+ /** @brief Base class for a line in the object table. */
+ class __object_info_base
+ {
+ public:
+ __object_info_base() { }
+
+ __object_info_base(__stack_t __stack)
+ : _M_stack(__stack), _M_valid(true) { }
+
+ __object_info_base(const __object_info_base& __o)
+ : _M_stack(__o._M_stack), _M_valid(__o._M_valid) { }
+
+ virtual ~__object_info_base() { }
+
+ bool
+ __is_valid() const
+ { return _M_valid; }
+
+ __stack_t
+ __stack() const
+ { return _M_stack; }
+
+ virtual void __write(FILE* __f) const = 0;
+
+ protected:
+ __stack_t _M_stack;
+ bool _M_valid;
+ };
+
+
+ /** @brief Base class for a line in the stack table. */
+ template<typename __object_info>
+ class __stack_info_base
+ {
+ public:
+ __stack_info_base() { }
+ __stack_info_base(const __object_info& __info) = 0;
+ virtual ~__stack_info_base() {}
+ void __merge(const __object_info& __info) = 0;
+ virtual float __magnitude() const = 0;
+ virtual const char* __get_id() const = 0;
+ };
+
+} // namespace __gnu_profile
+#endif /* _GLIBCXX_PROFILE_PROFILER_NODE_H */