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diff --git a/coregrind/pub_core_execontext.h b/coregrind/pub_core_execontext.h
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+++ b/coregrind/pub_core_execontext.h
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+
+/*--------------------------------------------------------------------*/
+/*--- ExeContexts: long-lived, non-dup'd stack traces.             ---*/
+/*---                                        pub_core_execontext.h ---*/
+/*--------------------------------------------------------------------*/
+
+/*
+   This file is part of Valgrind, a dynamic binary instrumentation
+   framework.
+
+   Copyright (C) 2000-2009 Julian Seward
+      jseward@acm.org
+
+   This program 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 2 of the
+   License, or (at your option) any later version.
+
+   This program 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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307, USA.
+
+   The GNU General Public License is contained in the file COPYING.
+*/
+
+#ifndef __PUB_CORE_EXECONTEXT_H
+#define __PUB_CORE_EXECONTEXT_H
+
+//--------------------------------------------------------------------
+// PURPOSE: This module provides an abstract data type, ExeContext,
+// which is a stack trace stored in such a way that duplicates are
+// avoided.  This also facilitates fast comparisons if necessary.
+//--------------------------------------------------------------------
+
+#include "pub_tool_execontext.h"
+
+/* The maximum number of calls we're prepared to save in an ExeContext. */
+#define VG_DEEPEST_BACKTRACE 50
+
+// Print stats (informational only).
+extern void VG_(print_ExeContext_stats) ( void );
+
+// Extract the StackTrace from an ExeContext.
+// (Minor hack: we use Addr* as the return type instead of StackTrace so
+// that modules #including this file don't also have to #include
+// pub_core_stacktrace.h also.)
+extern
+/*StackTrace*/Addr* VG_(get_ExeContext_StackTrace) ( ExeContext* e );
+
+
+#endif   // __PUB_CORE_EXECONTEXT_H
+
+/*--------------------------------------------------------------------*/
+/*--- end                                                          ---*/
+/*--------------------------------------------------------------------*/