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1 
2 /*--------------------------------------------------------------------*/
3 /*--- Debug (not-for-user) logging.            pub_core_debuglog.h ---*/
4 /*--------------------------------------------------------------------*/
5 
6 /*
7    This file is part of Valgrind, a dynamic binary instrumentation
8    framework.
9 
10    Copyright (C) 2000-2010 Julian Seward
11       jseward@acm.org
12 
13    This program is free software; you can redistribute it and/or
14    modify it under the terms of the GNU General Public License as
15    published by the Free Software Foundation; either version 2 of the
16    License, or (at your option) any later version.
17 
18    This program is distributed in the hope that it will be useful, but
19    WITHOUT ANY WARRANTY; without even the implied warranty of
20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21    General Public License for more details.
22 
23    You should have received a copy of the GNU General Public License
24    along with this program; if not, write to the Free Software
25    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26    02111-1307, USA.
27 
28    The GNU General Public License is contained in the file COPYING.
29 */
30 
31 #ifndef __PUB_CORE_DEBUGLOG_H
32 #define __PUB_CORE_DEBUGLOG_H
33 
34 //--------------------------------------------------------------------
35 // PURPOSE: This module provides a low-level debug logging facility
36 // that works through all the twists and turns of program startup.  Is
37 // is completely independent of everything, including all memory
38 // facilities, and emits the debug log on file descriptor 2 (stderr).
39 // This module is the first to be initialised at system startup.
40 //
41 // Because VG_(debugLog) does printf-style formatting, and because
42 // this module depends on NO OTHERS, this module contains Valgrind's
43 // vfprintf implementation too.
44 //--------------------------------------------------------------------
45 
46 /* Gaaah!  We don't want glibc dependencies, but there is no easy,
47    portable way to avoid using stdarg.h. */
48 #include <stdarg.h>
49 
50 #include "pub_tool_basics.h"  /* For definition of VG_ macro */
51 
52 /* There are no tool-visible exports from m_debuglog, hence no header
53    file for it. */
54 /* #include "pub_tool_debuglog.h" */
55 
56 
57 /* Module startup. */
58 extern
59 void VG_(debugLog_startup) ( Int level, HChar* who );
60 
61 
62 /* Get the logging threshold level, as set by the most recent call to
63    VG_(debugLog_startup), or zero if there have been no such calls so
64    far. */
65 extern
66 Int VG_(debugLog_getLevel) ( void );
67 
68 
69 /* Send debugging output.  Nothing happens unless 'level'
70    does not exceed the logging threshold level. */
71 extern
72 void VG_(debugLog) ( Int level, const HChar* modulename,
73                                 const HChar* format, ... )
74      __attribute__((format(__printf__, 3, 4)));
75 
76 
77 /* A simple vprintf().  For each emitted byte, (*send_fn) is called with
78    that byte, and 'send_arg2' as its second param. */
79 extern
80 UInt VG_(debugLog_vprintf) (
81         void (*send_fn)(HChar,void*),/* byte sink */
82         void* send_arg2,             /* 2nd arg for byte sink */
83         const HChar *format,
84         va_list vargs
85      );
86 
87 
88 #endif   // __PUB_CORE_DEBUGLOG_H
89 
90 /*--------------------------------------------------------------------*/
91 /*--- end                                      pub_core_debuglog.h ---*/
92 /*--------------------------------------------------------------------*/
93