2 * Management of the debugging channels
4 * Copyright 2000 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/port.h"
29 #ifdef HAVE_SYS_STAT_H
30 # include <sys/stat.h>
33 #include "wine/debug.h"
34 #include "wine/library.h"
36 static const char * const debug_classes[] = { "fixme", "err", "warn", "trace" };
38 #define MAX_DEBUG_OPTIONS 256
40 static unsigned char default_flags = (1 << __WINE_DBCL_ERR) | (1 << __WINE_DBCL_FIXME);
41 static int nb_debug_options = -1;
42 static struct __wine_debug_channel debug_options[MAX_DEBUG_OPTIONS];
44 static struct __wine_debug_functions funcs;
46 static void debug_init(void);
48 static int cmp_name( const void *p1, const void *p2 )
50 const char *name = p1;
51 const struct __wine_debug_channel *chan = p2;
52 return strcmp( name, chan->name );
55 /* get the flags to use for a given channel, possibly setting them too in case of lazy init */
56 unsigned char __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
58 if (nb_debug_options == -1) debug_init();
62 struct __wine_debug_channel *opt = bsearch( channel->name, debug_options, nb_debug_options,
63 sizeof(debug_options[0]), cmp_name );
64 if (opt) return opt->flags;
66 /* no option for this channel */
67 if (channel->flags & (1 << __WINE_DBCL_INIT)) channel->flags = default_flags;
71 /* set the flags to use for a given channel; return 0 if the channel is not available to set */
72 int __wine_dbg_set_channel_flags( struct __wine_debug_channel *channel,
73 unsigned char set, unsigned char clear )
75 if (nb_debug_options == -1) debug_init();
79 struct __wine_debug_channel *opt = bsearch( channel->name, debug_options, nb_debug_options,
80 sizeof(debug_options[0]), cmp_name );
83 opt->flags = (opt->flags & ~clear) | set;
90 /* add a new debug option at the end of the option list */
91 static void add_option( const char *name, unsigned char set, unsigned char clear )
93 int min = 0, max = nb_debug_options - 1, pos, res;
95 if (!name[0]) /* "all" option */
97 default_flags = (default_flags & ~clear) | set;
100 if (strlen(name) >= sizeof(debug_options[0].name)) return;
104 pos = (min + max) / 2;
105 res = strcmp( name, debug_options[pos].name );
108 debug_options[pos].flags = (debug_options[pos].flags & ~clear) | set;
111 if (res < 0) max = pos - 1;
114 if (nb_debug_options >= MAX_DEBUG_OPTIONS) return;
117 if (pos < nb_debug_options) memmove( &debug_options[pos + 1], &debug_options[pos],
118 (nb_debug_options - pos) * sizeof(debug_options[0]) );
119 strcpy( debug_options[pos].name, name );
120 debug_options[pos].flags = (default_flags & ~clear) | set;
124 /* parse a set of debugging option specifications and add them to the option list */
125 static void parse_options( const char *str )
127 char *opt, *next, *options;
130 if (!(options = strdup(str))) return;
131 for (opt = options; opt; opt = next)
134 unsigned char set = 0, clear = 0;
136 if ((next = strchr( opt, ',' ))) *next++ = 0;
138 p = opt + strcspn( opt, "+-" );
139 if (!p[0]) p = opt; /* assume it's a debug channel name */
143 for (i = 0; i < sizeof(debug_classes)/sizeof(debug_classes[0]); i++)
145 int len = strlen(debug_classes[i]);
146 if (len != (p - opt)) continue;
147 if (!memcmp( opt, debug_classes[i], len )) /* found it */
149 if (*p == '+') set |= 1 << i;
150 else clear |= 1 << i;
154 if (i == sizeof(debug_classes)/sizeof(debug_classes[0])) /* bad class name, skip it */
159 if (*p == '-') clear = ~0;
162 if (*p == '+' || *p == '-') p++;
165 if (!strcmp( p, "all" ))
166 default_flags = (default_flags & ~clear) | set;
168 add_option( p, set, clear );
174 /* print the usage message */
175 static void debug_usage(void)
177 static const char usage[] =
178 "Syntax of the WINEDEBUG variable:\n"
179 " WINEDEBUG=[class]+xxx,[class]-yyy,...\n\n"
180 "Example: WINEDEBUG=+all,warn-heap\n"
181 " turns on all messages except warning heap messages\n"
182 "Available message classes: err, warn, fixme, trace\n";
183 write( 2, usage, sizeof(usage) - 1 );
188 /* initialize all options at startup */
189 static void debug_init(void)
192 struct stat st1, st2;
194 if (nb_debug_options != -1) return; /* already initialized */
195 nb_debug_options = 0;
197 /* check for stderr pointing to /dev/null */
198 if (!fstat( 2, &st1 ) && S_ISCHR(st1.st_mode) &&
199 !stat( "/dev/null", &st2 ) && S_ISCHR(st2.st_mode) &&
200 st1.st_rdev == st2.st_rdev)
205 if ((wine_debug = getenv("WINEDEBUG")))
207 if (!strcmp( wine_debug, "help" )) debug_usage();
208 parse_options( wine_debug );
212 /* varargs wrapper for funcs.dbg_vprintf */
213 int wine_dbg_printf( const char *format, ... )
218 va_start(valist, format);
219 ret = funcs.dbg_vprintf( format, valist );
224 /* printf with temp buffer allocation */
225 const char *wine_dbg_sprintf( const char *format, ... )
227 static const int max_size = 200;
232 va_start(valist, format);
233 ret = funcs.get_temp_buffer( max_size );
234 len = vsnprintf( ret, max_size, format, valist );
235 if (len == -1 || len >= max_size) ret[max_size-1] = 0;
236 else funcs.release_temp_buffer( ret, len + 1 );
242 /* varargs wrapper for funcs.dbg_vlog */
243 int wine_dbg_log( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
244 const char *func, const char *format, ... )
249 if (!(__wine_dbg_get_channel_flags( channel ) & (1 << cls))) return -1;
251 va_start(valist, format);
252 ret = funcs.dbg_vlog( cls, channel, func, format, valist );
258 /* allocate some tmp string space */
259 /* FIXME: this is not 100% thread-safe */
260 static char *get_temp_buffer( size_t size )
262 static char *list[32];
267 idx = interlocked_xchg_add( &pos, 1 ) % (sizeof(list)/sizeof(list[0]));
268 if ((ret = realloc( list[idx], size ))) list[idx] = ret;
273 /* release unused part of the buffer */
274 static void release_temp_buffer( char *buffer, size_t size )
276 /* don't bother doing anything */
280 /* default implementation of wine_dbgstr_an */
281 static const char *default_dbgstr_an( const char *str, int n )
283 static const char hex[16] = "0123456789abcdef";
287 if (!((ULONG_PTR)str >> 16))
289 if (!str) return "(null)";
290 res = funcs.get_temp_buffer( 6 );
291 sprintf( res, "#%04x", LOWORD(str) );
294 if (n == -1) n = strlen(str);
296 size = 10 + min( 300, n * 4 );
297 dst = res = funcs.get_temp_buffer( size );
299 while (n-- > 0 && dst <= res + size - 9)
301 unsigned char c = *str++;
304 case '\n': *dst++ = '\\'; *dst++ = 'n'; break;
305 case '\r': *dst++ = '\\'; *dst++ = 'r'; break;
306 case '\t': *dst++ = '\\'; *dst++ = 't'; break;
307 case '"': *dst++ = '\\'; *dst++ = '"'; break;
308 case '\\': *dst++ = '\\'; *dst++ = '\\'; break;
310 if (c >= ' ' && c <= 126)
316 *dst++ = hex[(c >> 4) & 0x0f];
317 *dst++ = hex[c & 0x0f];
329 funcs.release_temp_buffer( res, dst - res );
334 /* default implementation of wine_dbgstr_wn */
335 static const char *default_dbgstr_wn( const WCHAR *str, int n )
340 if (!((ULONG_PTR)str >> 16))
342 if (!str) return "(null)";
343 res = funcs.get_temp_buffer( 6 );
344 sprintf( res, "#%04x", LOWORD(str) );
349 const WCHAR *end = str;
354 size = 12 + min( 300, n * 5 );
355 dst = res = funcs.get_temp_buffer( size );
358 while (n-- > 0 && dst <= res + size - 10)
363 case '\n': *dst++ = '\\'; *dst++ = 'n'; break;
364 case '\r': *dst++ = '\\'; *dst++ = 'r'; break;
365 case '\t': *dst++ = '\\'; *dst++ = 't'; break;
366 case '"': *dst++ = '\\'; *dst++ = '"'; break;
367 case '\\': *dst++ = '\\'; *dst++ = '\\'; break;
369 if (c >= ' ' && c <= 126)
374 sprintf(dst,"%04x",c);
387 funcs.release_temp_buffer( res, dst - res );
392 /* default implementation of wine_dbg_vprintf */
393 static int default_dbg_vprintf( const char *format, va_list args )
395 return vfprintf( stderr, format, args );
399 /* default implementation of wine_dbg_vlog */
400 static int default_dbg_vlog( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
401 const char *func, const char *format, va_list args )
405 if (cls < sizeof(debug_classes)/sizeof(debug_classes[0]))
406 ret += wine_dbg_printf( "%s:%s:%s ", debug_classes[cls], channel->name, func );
408 ret += funcs.dbg_vprintf( format, args );
412 /* wrappers to use the function pointers */
414 const char *wine_dbgstr_an( const char * s, int n )
416 return funcs.dbgstr_an(s, n);
419 const char *wine_dbgstr_wn( const WCHAR *s, int n )
421 return funcs.dbgstr_wn(s, n);
424 void __wine_dbg_set_functions( const struct __wine_debug_functions *new_funcs,
425 struct __wine_debug_functions *old_funcs, size_t size )
427 if (old_funcs) memcpy( old_funcs, &funcs, min(sizeof(funcs),size) );
428 if (new_funcs) memcpy( &funcs, new_funcs, min(sizeof(funcs),size) );
431 static struct __wine_debug_functions funcs =