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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"
#include "config.h"
#include "wine/port.h"
#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 "thread.h"
#include "winbase.h"
#include "winnt.h"
#include "winternl.h"
#include "excpt.h"
WINE_DECLARE_DEBUG_CHANNEL(tid);
/* ---------------------------------------------------------------------- */
struct debug_info
{
char *str_pos; /* current position in strings buffer */
char *out_pos; /* current position in output buffer */
char strings[1024]; /* buffer for temporary strings */
char output[1024]; /* current output line */
};
static struct debug_info initial_thread_info; /* debug info for initial thread */
/* 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)
{
struct debug_info *info = NtCurrentTeb()->debug_info;
if (!info) NtCurrentTeb()->debug_info = info = &initial_thread_info;
if (!info->str_pos)
{
info->str_pos = info->strings;
info->out_pos = info->output;
}
return info;
}
/* allocate some tmp space for a string */
static void *gimme1(int 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 inline void release( void *ptr )
{
struct debug_info *info = NtCurrentTeb()->debug_info;
info->str_pos = ptr;
}
/* put an ASCII string into the debug buffer */
inline static char *put_string_a( const char *src, int n )
{
char *dst, *res;
if (n == -1) n = strlen(src);
if (n < 0) n = 0;
else if (n > 80) n = 80;
dst = res = gimme1 (n * 4 + 6);
*dst++ = '"';
while (n-- > 0)
{
unsigned char c = *src++;
switch (c)
{
case '\n': *dst++ = '\\'; *dst++ = 'n'; break;
case '\r': *dst++ = '\\'; *dst++ = 'r'; break;
case '\t': *dst++ = '\\'; *dst++ = 't'; break;
case '"': *dst++ = '\\'; *dst++ = '"'; break;
case '\\': *dst++ = '\\'; *dst++ = '\\'; break;
default:
if (c >= ' ' && c <= 126)
*dst++ = c;
else
{
*dst++ = '\\';
*dst++ = '0' + ((c >> 6) & 7);
*dst++ = '0' + ((c >> 3) & 7);
*dst++ = '0' + ((c >> 0) & 7);
}
}
}
*dst++ = '"';
if (*src)
{
*dst++ = '.';
*dst++ = '.';
*dst++ = '.';
}
*dst++ = '\0';
release( dst );
return res;
}
/* put a Unicode string into the debug buffer */
inline static char *put_string_w( const WCHAR *src, int n )
{
char *dst, *res;
if (n == -1) n = strlenW(src);
if (n < 0) n = 0;
else if (n > 80) n = 80;
dst = res = gimme1 (n * 5 + 7);
*dst++ = 'L';
*dst++ = '"';
while (n-- > 0)
{
WCHAR c = *src++;
switch (c)
{
case '\n': *dst++ = '\\'; *dst++ = 'n'; break;
case '\r': *dst++ = '\\'; *dst++ = 'r'; break;
case '\t': *dst++ = '\\'; *dst++ = 't'; break;
case '"': *dst++ = '\\'; *dst++ = '"'; break;
case '\\': *dst++ = '\\'; *dst++ = '\\'; break;
default:
if (c >= ' ' && c <= 126)
*dst++ = c;
else
{
*dst++ = '\\';
sprintf(dst,"%04x",c);
dst+=4;
}
}
}
*dst++ = '"';
if (*src)
{
*dst++ = '.';
*dst++ = '.';
*dst++ = '.';
}
*dst++ = '\0';
release( dst );
return res;
}
/***********************************************************************
* NTDLL_dbgstr_an
*/
static const char *NTDLL_dbgstr_an( const char *src, int n )
{
char *res, *old_pos;
struct debug_info *info = get_info();
if (!HIWORD(src))
{
if (!src) return "(null)";
res = gimme1(6);
sprintf(res, "#%04x", LOWORD(src) );
return res;
}
/* save current position to restore it on exception */
old_pos = info->str_pos;
__TRY
{
res = put_string_a( src, n );
}
__EXCEPT(page_fault)
{
release( old_pos );
return "(invalid)";
}
__ENDTRY
return res;
}
/***********************************************************************
* NTDLL_dbgstr_wn
*/
static const char *NTDLL_dbgstr_wn( const WCHAR *src, int n )
{
char *res, *old_pos;
struct debug_info *info = get_info();
if (!HIWORD(src))
{
if (!src) return "(null)";
res = gimme1(6);
sprintf(res, "#%04x", LOWORD(src) );
return res;
}
/* save current position to restore it on exception */
old_pos = info->str_pos;
__TRY
{
res = put_string_w( src, n );
}
__EXCEPT(page_fault)
{
release( old_pos );
return "(invalid)";
}
__ENDTRY
return res;
}
/***********************************************************************
* NTDLL_dbg_vsprintf
*/
static const char *NTDLL_dbg_vsprintf( const char *format, va_list args )
{
static const int max_size = 200;
char *res = gimme1( max_size );
int len = vsnprintf( res, max_size, format, args );
if (len == -1 || len >= max_size) res[max_size-1] = 0;
else release( res + len + 1 );
return res;
}
/***********************************************************************
* NTDLL_dbg_vprintf
*/
static int NTDLL_dbg_vprintf( const char *format, va_list args )
{
struct debug_info *info = get_info();
char *p;
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();
}
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( unsigned int cls, const char *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:", NtCurrentTeb()->tid );
if (cls < sizeof(classes)/sizeof(classes[0]))
ret += wine_dbg_printf( "%s:%s:%s ", classes[cls], channel + 1, function );
}
if (format)
ret += NTDLL_dbg_vprintf( format, args );
return ret;
}
/***********************************************************************
* debug_init
*/
DECL_GLOBAL_CONSTRUCTOR(debug_init)
{
__wine_dbgstr_an = NTDLL_dbgstr_an;
__wine_dbgstr_wn = NTDLL_dbgstr_wn;
__wine_dbg_vsprintf = NTDLL_dbg_vsprintf;
__wine_dbg_vprintf = NTDLL_dbg_vprintf;
__wine_dbg_vlog = NTDLL_dbg_vlog;
}
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