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wine-wine/dlls/ntdll/unix/debug.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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#if 0
#pragma makedep unix
#endif
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "windef.h"
#include "winnt.h"
#include "winternl.h"
#include "unix_private.h"
#include "wine/debug.h"
WINE_DECLARE_DEBUG_CHANNEL(pid);
WINE_DECLARE_DEBUG_CHANNEL(timestamp);
static BOOL init_done;
static struct debug_info initial_info; /* debug info for initial thread */
static unsigned char default_flags = (1 << __WINE_DBCL_ERR) | (1 << __WINE_DBCL_FIXME);
static int nb_debug_options = -1;
static int options_size;
static struct __wine_debug_channel *debug_options;
static const char * const debug_classes[] = { "fixme", "err", "warn", "trace" };
/* get the debug info pointer for the current thread */
static inline struct debug_info *get_info(void)
{
if (!init_done) return &initial_info;
return ntdll_get_thread_data()->debug_info;
}
/* add a string to the output buffer */
static int append_output( struct debug_info *info, const char *str, size_t len )
{
if (len >= sizeof(info->output) - info->out_pos)
{
fprintf( stderr, "wine_dbg_output: debugstr buffer overflow (contents: '%s')\n", info->output );
info->out_pos = 0;
abort();
}
memcpy( info->output + info->out_pos, str, len );
info->out_pos += len;
return len;
}
/* add a new debug option at the end of the option list */
static void add_option( const char *name, unsigned char set, unsigned char clear )
{
int min = 0, max = nb_debug_options - 1, pos, res;
if (!name[0]) /* "all" option */
{
default_flags = (default_flags & ~clear) | set;
return;
}
if (strlen(name) >= sizeof(debug_options[0].name)) return;
while (min <= max)
{
pos = (min + max) / 2;
res = strcmp( name, debug_options[pos].name );
if (!res)
{
debug_options[pos].flags = (debug_options[pos].flags & ~clear) | set;
return;
}
if (res < 0) max = pos - 1;
else min = pos + 1;
}
if (nb_debug_options >= options_size)
{
options_size = max( options_size * 2, 16 );
debug_options = realloc( debug_options, options_size * sizeof(debug_options[0]) );
}
pos = min;
if (pos < nb_debug_options) memmove( &debug_options[pos + 1], &debug_options[pos],
(nb_debug_options - pos) * sizeof(debug_options[0]) );
strcpy( debug_options[pos].name, name );
debug_options[pos].flags = (default_flags & ~clear) | set;
nb_debug_options++;
}
/* parse a set of debugging option specifications and add them to the option list */
static void parse_options( const char *str )
{
char *opt, *next, *options;
unsigned int i;
if (!(options = strdup(str))) return;
for (opt = options; opt; opt = next)
{
const char *p;
unsigned char set = 0, clear = 0;
if ((next = strchr( opt, ',' ))) *next++ = 0;
p = opt + strcspn( opt, "+-" );
if (!p[0]) p = opt; /* assume it's a debug channel name */
if (p > opt)
{
for (i = 0; i < ARRAY_SIZE(debug_classes); i++)
{
int len = strlen(debug_classes[i]);
if (len != (p - opt)) continue;
if (!memcmp( opt, debug_classes[i], len )) /* found it */
{
if (*p == '+') set |= 1 << i;
else clear |= 1 << i;
break;
}
}
if (i == ARRAY_SIZE(debug_classes)) /* bad class name, skip it */
continue;
}
else
{
if (*p == '-') clear = ~0;
else set = ~0;
}
if (*p == '+' || *p == '-') p++;
if (!p[0]) continue;
if (!strcmp( p, "all" ))
default_flags = (default_flags & ~clear) | set;
else
add_option( p, set, clear );
}
free( options );
}
/* print the usage message */
static void debug_usage(void)
{
static const char usage[] =
"Syntax of the WINEDEBUG variable:\n"
" WINEDEBUG=[class]+xxx,[class]-yyy,...\n\n"
"Example: WINEDEBUG=+relay,warn-heap\n"
" turns on relay traces, disable heap warnings\n"
"Available message classes: err, warn, fixme, trace\n";
write( 2, usage, sizeof(usage) - 1 );
exit(1);
}
/* initialize all options at startup */
static void init_options(void)
{
char *wine_debug = getenv("WINEDEBUG");
struct stat st1, st2;
nb_debug_options = 0;
/* check for stderr pointing to /dev/null */
if (!fstat( 2, &st1 ) && S_ISCHR(st1.st_mode) &&
!stat( "/dev/null", &st2 ) && S_ISCHR(st2.st_mode) &&
st1.st_rdev == st2.st_rdev)
{
default_flags = 0;
return;
}
if (!wine_debug) return;
if (!strcmp( wine_debug, "help" )) debug_usage();
parse_options( wine_debug );
}
/***********************************************************************
* __wine_dbg_get_channel_flags (NTDLL.@)
*
* Get the flags to use for a given channel, possibly setting them too in case of lazy init
*/
unsigned char __cdecl __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
{
int min, max, pos, res;
if (nb_debug_options == -1) init_options();
min = 0;
max = nb_debug_options - 1;
while (min <= max)
{
pos = (min + max) / 2;
res = strcmp( channel->name, debug_options[pos].name );
if (!res) return debug_options[pos].flags;
if (res < 0) max = pos - 1;
else min = pos + 1;
}
/* no option for this channel */
if (channel->flags & (1 << __WINE_DBCL_INIT)) channel->flags = default_flags;
return default_flags;
}
/***********************************************************************
* __wine_dbg_strdup (NTDLL.@)
*/
const char * __cdecl __wine_dbg_strdup( const char *str )
{
struct debug_info *info = get_info();
unsigned int pos = info->str_pos;
size_t n = strlen( str ) + 1;
assert( n <= sizeof(info->strings) );
if (pos + n > sizeof(info->strings)) pos = 0;
info->str_pos = pos + n;
return memcpy( info->strings + pos, str, n );
}
/***********************************************************************
* __wine_dbg_output (NTDLL.@)
*/
int __cdecl __wine_dbg_output( const char *str )
{
struct debug_info *info = get_info();
const char *end = strrchr( str, '\n' );
int ret = 0;
if (end)
{
ret += append_output( info, str, end + 1 - str );
write( 2, info->output, info->out_pos );
info->out_pos = 0;
str = end + 1;
}
if (*str) ret += append_output( info, str, strlen( str ));
return ret;
}
/***********************************************************************
* __wine_dbg_header (NTDLL.@)
*/
int __cdecl __wine_dbg_header( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
const char *function )
{
static const char * const classes[] = { "fixme", "err", "warn", "trace" };
struct debug_info *info = get_info();
char buffer[200], *pos = buffer;
if (!(__wine_dbg_get_channel_flags( channel ) & (1 << cls))) return -1;
/* only print header if we are at the beginning of the line */
if (info->out_pos) return 0;
if (init_done)
{
if (TRACE_ON(timestamp))
{
ULONG ticks = NtGetTickCount();
pos += sprintf( pos, "%3u.%03u:", ticks / 1000, ticks % 1000 );
}
if (TRACE_ON(pid)) pos += sprintf( pos, "%04x:", GetCurrentProcessId() );
pos += sprintf( pos, "%04x:", GetCurrentThreadId() );
}
if (function && cls < ARRAY_SIZE( classes ))
snprintf( pos, sizeof(buffer) - (pos - buffer), "%s:%s:%s ",
classes[cls], channel->name, function );
return append_output( info, buffer, strlen( buffer ));
}
/***********************************************************************
* dbg_init
*/
void dbg_init(void)
{
setbuf( stdout, NULL );
setbuf( stderr, NULL );
ntdll_get_thread_data()->debug_info = &initial_info;
init_done = TRUE;
}
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