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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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487756039c
same logging mechanism to emit both end-user messages and debugging-
valgrind-itself messages. This commit creates a new mechanism for the
latter purpose.
The main feature of m_debuglog is that it has zero dependencies on any
other module and therefore can safely operate all the way through
stage1 and stage2 startup. It is restricted to emitting debug info on
file descriptor 2 (stderr), but that's not a big deal.
As a result of this change the basic formatted-print routines
(vprintf) have been moved from vg_mylibc.c into m_debuglog, so that
m_debuglog remains standalone.
The %y format string is currently disabled, since supporting it ("show
symbol corresponding to this address") would create a dependency from
m_debuglog to the entire debug-info reading machinery and all the
stuff that depends on, thereby making a nonsense of m_debuglog being
standalone. Its omission does not seem to cause any regression tests
to fail, though.
The debug logger is activated with "-d". More "-d"s make it more
verbose.
m_debuglog.o is linked into both stage1 and stage2, but as it is
completely standalone this causes no particular problems.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3559
84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- Debug (not-for-user) logging. pub_core_debuglog.h ---*/
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/*--------------------------------------------------------------------*/
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2000-2005 Julian Seward
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jseward@acm.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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#ifndef __PUB_CORE_DEBUGLOG_H
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#define __PUB_CORE_DEBUGLOG_H
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//--------------------------------------------------------------------
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// PURPOSE: This module provides a low-level debug logging facility
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// that works through all the twists and turns of program startup. Is
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// is completely independent of everything, including all memory
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// facilities, and emits the debug log on file descriptor 2 (stderr).
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// This module is the first to be initialised at system startup.
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//
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// Because VG_(debugLog) does printf-style formatting, and because
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// this module depends on NO OTHERS, this module contains Valgrind's
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// vfprintf implementation too.
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//--------------------------------------------------------------------
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/* Gaaah! We don't want glibc dependencies, but there is no easy,
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portable way to avoid using stdarg.h. */
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#include <stdarg.h>
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#include "core_asm.h" /* For definition of VG_ macro */
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/* There are no tool-visible exports from m_debuglog, hence no header
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file for it. */
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/* #include "pub_tool_debuglog.h" */
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/* Module startup. */
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extern
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void VG_(debugLog_startup) ( Int level, HChar* who );
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/* Send debugging output. Nothing happens unless 'level'
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does not exceed the logging threshold level. */
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extern
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__attribute__((format(__printf__, 3, 4)))
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void VG_(debugLog) ( Int level, const HChar* modulename,
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const HChar* format, ... );
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/* A simple vprintf(). For each emitted byte, (*send) is called with
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that byte, and 'send_arg2' as its second param. */
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extern
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UInt VG_(debugLog_vprintf) (
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void (*send)(HChar,void*), /* byte sink */
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void* send_arg2, /* 2nd arg for byte sink */
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const HChar *format,
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va_list vargs
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);
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#endif // __PUB_CORE_DEBUGLOG_H
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/*--------------------------------------------------------------------*/
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/*--- end pub_core_debuglog.h ---*/
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/*--------------------------------------------------------------------*/
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