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+
+/*--------------------------------------------------------------------*/
+/*--- Debug (not-for-user) logging.            pub_core_debuglog.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_DEBUGLOG_H
+#define __PUB_CORE_DEBUGLOG_H
+
+//--------------------------------------------------------------------
+// PURPOSE: This module provides a low-level debug logging facility
+// that works through all the twists and turns of program startup.  Is
+// is completely independent of everything, including all memory
+// facilities, and emits the debug log on file descriptor 2 (stderr).
+// This module is the first to be initialised at system startup.
+//
+// Because VG_(debugLog) does printf-style formatting, and because
+// this module depends on NO OTHERS, this module contains Valgrind's
+// vfprintf implementation too.
+//--------------------------------------------------------------------
+
+/* Gaaah!  We don't want glibc dependencies, but there is no easy,
+   portable way to avoid using stdarg.h. */
+#include <stdarg.h>
+
+#include "pub_tool_basics.h"  /* For definition of VG_ macro */
+
+/* There are no tool-visible exports from m_debuglog, hence no header
+   file for it. */
+/* #include "pub_tool_debuglog.h" */
+
+
+/* Module startup. */
+extern 
+void VG_(debugLog_startup) ( Int level, HChar* who );
+
+
+/* Get the logging threshold level, as set by the most recent call to
+   VG_(debugLog_startup), or zero if there have been no such calls so
+   far. */
+extern
+Int VG_(debugLog_getLevel) ( void );
+
+
+/* Send debugging output.  Nothing happens unless 'level' 
+   does not exceed the logging threshold level. */
+extern
+__attribute__((format(__printf__, 3, 4)))
+void VG_(debugLog) ( Int level, const HChar* modulename,
+                                const HChar* format, ... );
+
+
+/* A simple vprintf().  For each emitted byte, (*send) is called with
+   that byte, and 'send_arg2' as its second param. */
+extern
+UInt VG_(debugLog_vprintf) ( 
+        void (*send)(HChar,void*),   /* byte sink */
+        void* send_arg2,             /* 2nd arg for byte sink */
+        const HChar *format, 
+        va_list vargs
+     );
+
+
+#endif   // __PUB_CORE_DEBUGLOG_H
+
+/*--------------------------------------------------------------------*/
+/*--- end                                      pub_core_debuglog.h ---*/
+/*--------------------------------------------------------------------*/