448 lines
12 KiB
C
448 lines
12 KiB
C
/*
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* Management of the debugging channels
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*
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* Copyright 2000 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#include "wine/debug.h"
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#include "wine/library.h"
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#if defined(__MINGW32__) || defined(_MSC_VER)
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WINE_DECLARE_DEBUG_CHANNEL(tid);
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#endif
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static const char * const debug_classes[] = { "fixme", "err", "warn", "trace" };
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#define MAX_DEBUG_OPTIONS 256
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static unsigned char default_flags = (1 << __WINE_DBCL_ERR) | (1 << __WINE_DBCL_FIXME);
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static int nb_debug_options = -1;
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static struct __wine_debug_channel debug_options[MAX_DEBUG_OPTIONS];
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static struct __wine_debug_functions funcs;
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static void debug_init(void);
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static int cmp_name( const void *p1, const void *p2 )
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{
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const char *name = p1;
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const struct __wine_debug_channel *chan = p2;
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return strcmp( name, chan->name );
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}
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/* get the flags to use for a given channel, possibly setting them too in case of lazy init */
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unsigned char __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
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{
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if (nb_debug_options == -1) debug_init();
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if (nb_debug_options)
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{
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struct __wine_debug_channel *opt = bsearch( channel->name, debug_options, nb_debug_options,
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sizeof(debug_options[0]), cmp_name );
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if (opt) return opt->flags;
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}
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/* no option for this channel */
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if (channel->flags & (1 << __WINE_DBCL_INIT)) channel->flags = default_flags;
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return default_flags;
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}
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/* set the flags to use for a given channel; return 0 if the channel is not available to set */
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int __wine_dbg_set_channel_flags( struct __wine_debug_channel *channel,
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unsigned char set, unsigned char clear )
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{
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if (nb_debug_options == -1) debug_init();
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if (nb_debug_options)
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{
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struct __wine_debug_channel *opt = bsearch( channel->name, debug_options, nb_debug_options,
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sizeof(debug_options[0]), cmp_name );
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if (opt)
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{
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opt->flags = (opt->flags & ~clear) | set;
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return 1;
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}
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}
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return 0;
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}
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/* add a new debug option at the end of the option list */
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static void add_option( const char *name, unsigned char set, unsigned char clear )
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{
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int min = 0, max = nb_debug_options - 1, pos, res;
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if (!name[0]) /* "all" option */
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{
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default_flags = (default_flags & ~clear) | set;
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return;
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}
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if (strlen(name) >= sizeof(debug_options[0].name)) return;
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while (min <= max)
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{
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pos = (min + max) / 2;
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res = strcmp( name, debug_options[pos].name );
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if (!res)
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{
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debug_options[pos].flags = (debug_options[pos].flags & ~clear) | set;
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return;
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}
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if (res < 0) max = pos - 1;
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else min = pos + 1;
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}
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if (nb_debug_options >= MAX_DEBUG_OPTIONS) return;
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pos = min;
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if (pos < nb_debug_options) memmove( &debug_options[pos + 1], &debug_options[pos],
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(nb_debug_options - pos) * sizeof(debug_options[0]) );
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strcpy( debug_options[pos].name, name );
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debug_options[pos].flags = (default_flags & ~clear) | set;
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nb_debug_options++;
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}
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/* parse a set of debugging option specifications and add them to the option list */
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static void parse_options( const char *str )
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{
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char *opt, *next, *options;
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unsigned int i;
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if (!(options = strdup(str))) return;
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for (opt = options; opt; opt = next)
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{
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const char *p;
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unsigned char set = 0, clear = 0;
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if ((next = strchr( opt, ',' ))) *next++ = 0;
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p = opt + strcspn( opt, "+-" );
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if (!p[0]) p = opt; /* assume it's a debug channel name */
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if (p > opt)
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{
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for (i = 0; i < sizeof(debug_classes)/sizeof(debug_classes[0]); i++)
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{
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int len = strlen(debug_classes[i]);
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if (len != (p - opt)) continue;
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if (!memcmp( opt, debug_classes[i], len )) /* found it */
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{
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if (*p == '+') set |= 1 << i;
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else clear |= 1 << i;
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break;
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}
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}
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if (i == sizeof(debug_classes)/sizeof(debug_classes[0])) /* bad class name, skip it */
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continue;
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}
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else
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{
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if (*p == '-') clear = ~0;
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else set = ~0;
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}
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if (*p == '+' || *p == '-') p++;
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if (!p[0]) continue;
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if (!strcmp( p, "all" ))
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default_flags = (default_flags & ~clear) | set;
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else
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add_option( p, set, clear );
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}
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free( options );
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}
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/* print the usage message */
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static void debug_usage(void)
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{
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static const char usage[] =
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"Syntax of the WINEDEBUG variable:\n"
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" WINEDEBUG=[class]+xxx,[class]-yyy,...\n\n"
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"Example: WINEDEBUG=+all,warn-heap\n"
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" turns on all messages except warning heap messages\n"
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"Available message classes: err, warn, fixme, trace\n";
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write( 2, usage, sizeof(usage) - 1 );
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exit(1);
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}
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/* initialize all options at startup */
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static void debug_init(void)
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{
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char *wine_debug;
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struct stat st1, st2;
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if (nb_debug_options != -1) return; /* already initialized */
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nb_debug_options = 0;
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/* check for stderr pointing to /dev/null */
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if (!fstat( 2, &st1 ) && S_ISCHR(st1.st_mode) &&
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!stat( "/dev/null", &st2 ) && S_ISCHR(st2.st_mode) &&
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st1.st_rdev == st2.st_rdev)
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{
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default_flags = 0;
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return;
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}
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if ((wine_debug = getenv("WINEDEBUG")))
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{
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if (!strcmp( wine_debug, "help" )) debug_usage();
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parse_options( wine_debug );
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}
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}
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/* varargs wrapper for funcs.dbg_vprintf */
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int wine_dbg_printf( const char *format, ... )
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{
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int ret;
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va_list valist;
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va_start(valist, format);
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ret = funcs.dbg_vprintf( format, valist );
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va_end(valist);
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return ret;
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}
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/* printf with temp buffer allocation */
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const char *wine_dbg_sprintf( const char *format, ... )
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{
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static const int max_size = 200;
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char *ret;
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int len;
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va_list valist;
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va_start(valist, format);
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ret = funcs.get_temp_buffer( max_size );
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len = vsnprintf( ret, max_size, format, valist );
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if (len == -1 || len >= max_size) ret[max_size-1] = 0;
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else funcs.release_temp_buffer( ret, len + 1 );
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va_end(valist);
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return ret;
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}
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/* varargs wrapper for funcs.dbg_vlog */
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int wine_dbg_log( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
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const char *func, const char *format, ... )
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{
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int ret;
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va_list valist;
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if (!(__wine_dbg_get_channel_flags( channel ) & (1 << cls))) return -1;
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va_start(valist, format);
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ret = funcs.dbg_vlog( cls, channel, func, format, valist );
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va_end(valist);
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return ret;
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}
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/* allocate some tmp string space */
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/* FIXME: this is not 100% thread-safe */
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static char *get_temp_buffer( size_t size )
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{
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static char *list[32];
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static int pos;
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char *ret;
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int idx;
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idx = interlocked_xchg_add( &pos, 1 ) % (sizeof(list)/sizeof(list[0]));
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if ((ret = realloc( list[idx], size ))) list[idx] = ret;
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return ret;
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}
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/* release unused part of the buffer */
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static void release_temp_buffer( char *buffer, size_t size )
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{
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/* don't bother doing anything */
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}
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/* default implementation of wine_dbgstr_an */
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static const char *default_dbgstr_an( const char *str, int n )
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{
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static const char hex[16] = "0123456789abcdef";
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char *dst, *res;
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size_t size;
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if (!((ULONG_PTR)str >> 16))
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{
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if (!str) return "(null)";
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res = funcs.get_temp_buffer( 6 );
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sprintf( res, "#%04x", LOWORD(str) );
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return res;
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}
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if (n == -1) n = strlen(str);
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if (n < 0) n = 0;
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size = 10 + min( 300, n * 4 );
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dst = res = funcs.get_temp_buffer( size );
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*dst++ = '"';
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while (n-- > 0 && dst <= res + size - 9)
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{
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unsigned char c = *str++;
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switch (c)
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{
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case '\n': *dst++ = '\\'; *dst++ = 'n'; break;
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case '\r': *dst++ = '\\'; *dst++ = 'r'; break;
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case '\t': *dst++ = '\\'; *dst++ = 't'; break;
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case '"': *dst++ = '\\'; *dst++ = '"'; break;
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case '\\': *dst++ = '\\'; *dst++ = '\\'; break;
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default:
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if (c >= ' ' && c <= 126)
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*dst++ = c;
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else
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{
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*dst++ = '\\';
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*dst++ = 'x';
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*dst++ = hex[(c >> 4) & 0x0f];
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*dst++ = hex[c & 0x0f];
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}
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}
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}
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*dst++ = '"';
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if (n > 0)
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{
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*dst++ = '.';
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*dst++ = '.';
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*dst++ = '.';
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}
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*dst++ = 0;
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funcs.release_temp_buffer( res, dst - res );
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return res;
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}
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/* default implementation of wine_dbgstr_wn */
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static const char *default_dbgstr_wn( const WCHAR *str, int n )
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{
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char *dst, *res;
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size_t size;
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if (!((ULONG_PTR)str >> 16))
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{
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if (!str) return "(null)";
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res = funcs.get_temp_buffer( 6 );
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sprintf( res, "#%04x", LOWORD(str) );
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return res;
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}
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if (n == -1)
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{
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const WCHAR *end = str;
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while (*end) end++;
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n = end - str;
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}
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if (n < 0) n = 0;
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size = 12 + min( 300, n * 5 );
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dst = res = funcs.get_temp_buffer( size );
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*dst++ = 'L';
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*dst++ = '"';
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while (n-- > 0 && dst <= res + size - 10)
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{
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WCHAR c = *str++;
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switch (c)
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{
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case '\n': *dst++ = '\\'; *dst++ = 'n'; break;
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case '\r': *dst++ = '\\'; *dst++ = 'r'; break;
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case '\t': *dst++ = '\\'; *dst++ = 't'; break;
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case '"': *dst++ = '\\'; *dst++ = '"'; break;
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case '\\': *dst++ = '\\'; *dst++ = '\\'; break;
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default:
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if (c >= ' ' && c <= 126)
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*dst++ = c;
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else
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{
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*dst++ = '\\';
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sprintf(dst,"%04x",c);
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dst+=4;
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}
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}
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}
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*dst++ = '"';
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if (n > 0)
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{
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*dst++ = '.';
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*dst++ = '.';
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*dst++ = '.';
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}
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*dst++ = 0;
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funcs.release_temp_buffer( res, dst - res );
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return res;
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}
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/* default implementation of wine_dbg_vprintf */
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static int default_dbg_vprintf( const char *format, va_list args )
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{
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return vfprintf( stderr, format, args );
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}
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/* default implementation of wine_dbg_vlog */
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static int default_dbg_vlog( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
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const char *func, const char *format, va_list args )
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{
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int ret = 0;
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#if defined(__MINGW32__) || defined(_MSC_VER)
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if (TRACE_ON(tid))
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ret += wine_dbg_printf( "%04x:", GetCurrentThreadId() );
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#endif
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if (cls < sizeof(debug_classes)/sizeof(debug_classes[0]))
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ret += wine_dbg_printf( "%s:%s:%s ", debug_classes[cls], channel->name, func );
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if (format)
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ret += funcs.dbg_vprintf( format, args );
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return ret;
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}
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/* wrappers to use the function pointers */
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const char *wine_dbgstr_an( const char * s, int n )
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{
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return funcs.dbgstr_an(s, n);
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}
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const char *wine_dbgstr_wn( const WCHAR *s, int n )
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{
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return funcs.dbgstr_wn(s, n);
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}
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void __wine_dbg_set_functions( const struct __wine_debug_functions *new_funcs,
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struct __wine_debug_functions *old_funcs, size_t size )
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{
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if (old_funcs) memcpy( old_funcs, &funcs, min(sizeof(funcs),size) );
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if (new_funcs) memcpy( &funcs, new_funcs, min(sizeof(funcs),size) );
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}
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static struct __wine_debug_functions funcs =
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{
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get_temp_buffer,
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release_temp_buffer,
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default_dbgstr_an,
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default_dbgstr_wn,
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default_dbg_vprintf,
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default_dbg_vlog
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};
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