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. */
58extern
59void 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. */
65extern
66Int VG_(debugLog_getLevel) ( void );
67
68
69/* Send debugging output.  Nothing happens unless 'level'
70   does not exceed the logging threshold level. */
71extern
72void 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. */
79extern
80UInt 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