253 lines
8.0 KiB
C
253 lines
8.0 KiB
C
/*
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* Fallbacks for debugging functions when running on Windows
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*
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* Copyright 2019 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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#ifdef __WINE_PE_BUILD
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wine/debug.h"
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#include "wine/heap.h"
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WINE_DECLARE_DEBUG_CHANNEL(pid);
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WINE_DECLARE_DEBUG_CHANNEL(timestamp);
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static const char * (__cdecl *p__wine_dbg_strdup)( const char *str );
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static int (__cdecl *p__wine_dbg_output)( const char *str );
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static unsigned char (__cdecl *p__wine_dbg_get_channel_flags)( struct __wine_debug_channel *channel );
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static int (__cdecl *p__wine_dbg_header)( enum __wine_debug_class cls,
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struct __wine_debug_channel *channel,
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const char *function );
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static const char * const debug_classes[] = { "fixme", "err", "warn", "trace" };
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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 int options_size;
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static struct __wine_debug_channel *debug_options;
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static DWORD partial_line_tid; /* id of the last thread to output a partial line */
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static void load_func( void **func, const char *name, void *def )
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{
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if (!*func)
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{
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DWORD err = GetLastError();
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HMODULE module = GetModuleHandleA( "ntdll.dll" );
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void *proc = GetProcAddress( module, name );
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InterlockedExchangePointer( func, proc ? proc : def );
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SetLastError( err );
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}
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}
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#define LOAD_FUNC(name) load_func( (void **)&p ## name, #name, fallback ## name )
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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 >= options_size)
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{
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options_size = max( options_size * 2, 16 );
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debug_options = heap_realloc( debug_options, options_size * sizeof(debug_options[0]) );
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}
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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 < ARRAY_SIZE(debug_classes); 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 == ARRAY_SIZE(debug_classes)) /* 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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/* initialize all options at startup */
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static void init_options(void)
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{
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char *wine_debug = getenv("WINEDEBUG");
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nb_debug_options = 0;
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if (wine_debug) parse_options( wine_debug );
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}
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/* FIXME: this is not 100% thread-safe */
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static const char * __cdecl fallback__wine_dbg_strdup( const char *str )
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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 = strdup( str );
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int idx;
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idx = InterlockedIncrement( &pos ) % ARRAY_SIZE(list);
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free( InterlockedExchangePointer( (void **)&list[idx], ret ));
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return ret;
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}
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static int __cdecl fallback__wine_dbg_output( const char *str )
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{
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size_t len = strlen( str );
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if (!len) return 0;
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InterlockedExchange( (LONG *)&partial_line_tid, str[len - 1] != '\n' ? GetCurrentThreadId() : 0 );
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return fwrite( str, 1, len, stderr );
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}
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static int __cdecl fallback__wine_dbg_header( enum __wine_debug_class cls,
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struct __wine_debug_channel *channel,
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const char *function )
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{
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char buffer[200], *pos = buffer;
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if (!(__wine_dbg_get_channel_flags( channel ) & (1 << cls))) return -1;
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/* skip header if partial line and no other thread came in between */
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if (partial_line_tid == GetCurrentThreadId()) return 0;
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if (TRACE_ON(timestamp))
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{
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ULONG ticks = GetTickCount();
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pos += sprintf( pos, "%3u.%03u:", ticks / 1000, ticks % 1000 );
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}
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if (TRACE_ON(pid)) pos += sprintf( pos, "%04x:", GetCurrentProcessId() );
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pos += sprintf( pos, "%04x:", GetCurrentThreadId() );
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if (function && cls < ARRAY_SIZE( debug_classes ))
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snprintf( pos, sizeof(buffer) - (pos - buffer), "%s:%s:%s ",
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debug_classes[cls], channel->name, function );
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return fwrite( buffer, 1, strlen(buffer), stderr );
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}
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static unsigned char __cdecl fallback__wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
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{
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int min, max, pos, res;
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if (nb_debug_options == -1) init_options();
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min = 0;
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max = nb_debug_options - 1;
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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( channel->name, debug_options[pos].name );
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if (!res) return debug_options[pos].flags;
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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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/* 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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const char * __cdecl __wine_dbg_strdup( const char *str )
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{
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LOAD_FUNC( __wine_dbg_strdup );
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return p__wine_dbg_strdup( str );
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}
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int __cdecl __wine_dbg_output( const char *str )
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{
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LOAD_FUNC( __wine_dbg_output );
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return p__wine_dbg_output( str );
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}
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unsigned char __cdecl __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
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{
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LOAD_FUNC( __wine_dbg_get_channel_flags );
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return p__wine_dbg_get_channel_flags( channel );
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}
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int __cdecl __wine_dbg_header( enum __wine_debug_class cls, struct __wine_debug_channel *channel,
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const char *function )
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{
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LOAD_FUNC( __wine_dbg_header );
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return p__wine_dbg_header( cls, channel, function );
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}
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#endif /* __WINE_PE_BUILD */
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