Sweden-Number/dlls/ntdll/debugtools.c

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/*
* Debugging functions
*
* Copyright 2000 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
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#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <ctype.h>
#include "wine/debug.h"
#include "wine/exception.h"
#include "wine/library.h"
#include "wine/unicode.h"
#include "ntstatus.h"
#include "winnt.h"
#include "winternl.h"
#include "excpt.h"
#include "ntdll_misc.h"
WINE_DECLARE_DEBUG_CHANNEL(tid);
static struct __wine_debug_functions default_funcs;
/* ---------------------------------------------------------------------- */
/* filter for page-fault exceptions */
static WINE_EXCEPTION_FILTER(page_fault)
{
if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
return EXCEPTION_EXECUTE_HANDLER;
return EXCEPTION_CONTINUE_SEARCH;
}
/* get the debug info pointer for the current thread */
static inline struct debug_info *get_info(void)
{
return ntdll_get_thread_data()->debug_info;
}
/* allocate some tmp space for a string */
static char *get_temp_buffer( size_t n )
{
struct debug_info *info = get_info();
char *res = info->str_pos;
if (res + n >= &info->strings[sizeof(info->strings)]) res = info->strings;
info->str_pos = res + n;
return res;
}
/* release extra space that we requested in gimme1() */
static void release_temp_buffer( char *ptr, size_t size )
{
struct debug_info *info = get_info();
info->str_pos = ptr + size;
}
/***********************************************************************
* NTDLL_dbgstr_an
*/
static const char *NTDLL_dbgstr_an( const char *src, int n )
{
const char *res;
struct debug_info *info = get_info();
/* save current position to restore it on exception */
char *old_pos = info->str_pos;
__TRY
{
res = default_funcs.dbgstr_an( src, n );
}
__EXCEPT(page_fault)
{
release_temp_buffer( old_pos, 0 );
return "(invalid)";
}
__ENDTRY
return res;
}
/***********************************************************************
* NTDLL_dbgstr_wn
*/
static const char *NTDLL_dbgstr_wn( const WCHAR *src, int n )
{
const char *res;
struct debug_info *info = get_info();
/* save current position to restore it on exception */
char *old_pos = info->str_pos;
__TRY
{
res = default_funcs.dbgstr_wn( src, n );
}
__EXCEPT(page_fault)
{
release_temp_buffer( old_pos, 0 );
return "(invalid)";
}
__ENDTRY
return res;
}
/***********************************************************************
* NTDLL_dbg_vprintf
*/
static int NTDLL_dbg_vprintf( const char *format, va_list args )
{
struct debug_info *info = get_info();
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char *p;
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int ret = vsnprintf( info->out_pos, sizeof(info->output) - (info->out_pos - info->output),
format, args );
/* make sure we didn't exceed the buffer length
* the two checks are due to glibc changes in vsnprintfs return value
* the buffer size can be exceeded in case of a missing \n in
* debug output */
if ((ret == -1) || (ret >= sizeof(info->output) - (info->out_pos - info->output)))
{
fprintf( stderr, "wine_dbg_vprintf: debugstr buffer overflow (contents: '%s')\n",
info->output);
info->out_pos = info->output;
abort();
}
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p = strrchr( info->out_pos, '\n' );
if (!p) info->out_pos += ret;
else
{
char *pos = info->output;
p++;
write( 2, pos, p - pos );
/* move beginning of next line to start of buffer */
while ((*pos = *p++)) pos++;
info->out_pos = pos;
}
return ret;
}
/***********************************************************************
* NTDLL_dbg_vlog
*/
static int NTDLL_dbg_vlog( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
const char *function, const char *format, va_list args )
{
static const char * const classes[] = { "fixme", "err", "warn", "trace" };
struct debug_info *info = get_info();
int ret = 0;
/* only print header if we are at the beginning of the line */
if (info->out_pos == info->output || info->out_pos[-1] == '\n')
{
if (TRACE_ON(tid))
ret = wine_dbg_printf( "%04lx:", GetCurrentThreadId() );
if (cls < sizeof(classes)/sizeof(classes[0]))
ret += wine_dbg_printf( "%s:%s:%s ", classes[cls], channel->name, function );
}
if (format)
ret += NTDLL_dbg_vprintf( format, args );
return ret;
}
static const struct __wine_debug_functions funcs =
{
get_temp_buffer,
release_temp_buffer,
NTDLL_dbgstr_an,
NTDLL_dbgstr_wn,
NTDLL_dbg_vprintf,
NTDLL_dbg_vlog
};
/***********************************************************************
* debug_init
*/
void debug_init(void)
{
__wine_dbg_set_functions( &funcs, &default_funcs, sizeof(funcs) );
}