2 * Dlls load order support
4 * Copyright 1999 Bertho Stultiens
5 * Copyright 2003 Alexandre Julliard
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "wine/port.h"
35 #include "ntdll_misc.h"
38 #include "wine/debug.h"
39 #include "wine/unicode.h"
41 WINE_DEFAULT_DEBUG_CHANNEL(module);
43 #define LOADORDER_ALLOC_CLUSTER 32 /* Allocate with 32 entries at a time */
45 typedef struct module_loadorder
47 const WCHAR *modulename;
48 enum loadorder_type loadorder[LOADORDER_NTYPES];
55 module_loadorder_t *order;
58 /* dll to load as builtins if not explicitly specified otherwise */
59 /* the list must remain sorted by dll name */
60 static const WCHAR default_builtins[][10] =
62 { 'g','d','i','3','2',0 },
63 { 'i','c','m','p',0 },
64 { 'k','e','r','n','e','l','3','2',0 },
65 { 'n','t','d','l','l',0 },
66 { 'o','d','b','c','3','2',0 },
67 { 't','t','y','d','r','v',0 },
68 { 'u','s','e','r','3','2',0 },
69 { 'w','3','2','s','k','r','n','l',0 },
70 { 'w','i','n','e','d','o','s',0 },
71 { 'w','i','n','e','p','s',0 },
72 { 'w','i','n','m','m',0 },
73 { 'w','n','a','s','p','i','3','2',0 },
74 { 'w','o','w','3','2',0 },
75 { 'w','s','2','_','3','2',0 },
76 { 'w','s','o','c','k','3','2',0 },
77 { 'x','1','1','d','r','v',0 }
80 /* default if nothing else specified */
81 static const enum loadorder_type default_loadorder[LOADORDER_NTYPES] =
83 LOADORDER_BI, LOADORDER_DLL, 0
86 /* default for modules with an explicit path */
87 static const enum loadorder_type default_path_loadorder[LOADORDER_NTYPES] =
89 LOADORDER_DLL, LOADORDER_BI, 0
92 static const WCHAR separatorsW[] = {',',' ','\t',0};
95 static struct loadorder_list env_list;
98 /***************************************************************************
99 * cmp_sort_func (internal, static)
101 * Sorting and comparing function used in sort and search of loadorder
104 static int cmp_sort_func(const void *s1, const void *s2)
106 return strcmpiW(((const module_loadorder_t *)s1)->modulename, ((const module_loadorder_t *)s2)->modulename);
110 /***************************************************************************
113 static int strcmp_func(const void *s1, const void *s2)
115 return strcmpiW( (const WCHAR *)s1, (const WCHAR *)s2 );
119 /***************************************************************************
122 * Return the base name of a file name (i.e. remove the path components).
124 static const WCHAR *get_basename( const WCHAR *name )
128 if (name[0] && name[1] == ':') name += 2; /* strip drive specification */
129 if ((ptr = strrchrW( name, '\\' ))) name = ptr + 1;
130 if ((ptr = strrchrW( name, '/' ))) name = ptr + 1;
134 /***************************************************************************
137 * Remove extension if it is ".dll".
139 static inline void remove_dll_ext( WCHAR *ext )
142 toupperW(ext[1]) == 'D' &&
143 toupperW(ext[2]) == 'L' &&
144 toupperW(ext[3]) == 'L' &&
149 /***************************************************************************
152 * Return a loadorder in printable form.
154 static const char *debugstr_loadorder( enum loadorder_type lo[] )
157 char buffer[LOADORDER_NTYPES*3+1];
160 for(i = 0; i < LOADORDER_NTYPES; i++)
162 if (lo[i] == LOADORDER_INVALID) break;
165 case LOADORDER_DLL: strcat( buffer, "n," ); break;
166 case LOADORDER_BI: strcat( buffer, "b," ); break;
167 default: strcat( buffer, "?," ); break;
170 if (buffer[0]) buffer[strlen(buffer)-1] = 0;
171 return debugstr_a(buffer);
175 /***************************************************************************
178 * Append a load order to the list if necessary.
180 static void append_load_order(enum loadorder_type lo[], enum loadorder_type append)
184 for (i = 0; i < LOADORDER_NTYPES; i++)
186 if (lo[i] == LOADORDER_INVALID) /* append it here */
189 lo[i] = LOADORDER_INVALID;
192 if (lo[i] == append) return; /* already in the list */
194 assert(0); /* cannot get here */
198 /***************************************************************************
201 * Parses the loadorder options from the configuration and puts it into
204 static void parse_load_order( const WCHAR *order, enum loadorder_type lo[] )
206 lo[0] = LOADORDER_INVALID;
209 order += strspnW( order, separatorsW );
212 case 'N': /* Native */
214 append_load_order( lo, LOADORDER_DLL );
216 case 'B': /* Builtin */
218 append_load_order( lo, LOADORDER_BI );
221 order += strcspnW( order, separatorsW );
226 /***************************************************************************
229 * Adds an entry in the list of environment overrides.
231 static void add_load_order( const module_loadorder_t *plo )
235 for(i = 0; i < env_list.count; i++)
237 if(!cmp_sort_func(plo, &env_list.order[i] ))
239 /* replace existing option */
240 memcpy( env_list.order[i].loadorder, plo->loadorder, sizeof(plo->loadorder));
245 if (i >= env_list.alloc)
247 /* No space in current array, make it larger */
248 env_list.alloc += LOADORDER_ALLOC_CLUSTER;
250 env_list.order = RtlReAllocateHeap(GetProcessHeap(), 0, env_list.order,
251 env_list.alloc * sizeof(module_loadorder_t));
253 env_list.order = RtlAllocateHeap(GetProcessHeap(), 0,
254 env_list.alloc * sizeof(module_loadorder_t));
257 MESSAGE("Virtual memory exhausted\n");
261 memcpy(env_list.order[i].loadorder, plo->loadorder, sizeof(plo->loadorder));
262 env_list.order[i].modulename = plo->modulename;
267 /***************************************************************************
270 * Adds a set of entries in the list of command-line overrides from the key parameter.
272 static void add_load_order_set( WCHAR *entry )
274 module_loadorder_t ldo;
275 WCHAR *end = strchrW( entry, '=' );
279 parse_load_order( end, ldo.loadorder );
283 entry += strspnW( entry, separatorsW );
284 end = entry + strcspnW( entry, separatorsW );
285 if (*end) *end++ = 0;
288 WCHAR *ext = strrchrW(entry, '.');
289 if (ext) remove_dll_ext( ext );
290 ldo.modulename = entry;
291 add_load_order( &ldo );
298 /***************************************************************************
301 static void init_load_order(void)
303 const char *order = getenv( "WINEDLLOVERRIDES" );
310 if (!strcmp( order, "help" ))
313 " WINEDLLOVERRIDES=\"entry;entry;entry...\"\n"
314 " where each entry is of the form:\n"
315 " module[,module...]={native|builtin}[,{b|n}]\n"
317 " Only the first letter of the override (native or builtin)\n"
318 " is significant.\n\n"
320 " WINEDLLOVERRIDES=\"comdlg32=n,b;shell32,shlwapi=b\"\n" );
324 RtlCreateUnicodeStringFromAsciiz( &strW, order );
328 while (*entry && *entry == ';') entry++;
330 next = strchrW( entry, ';' );
331 if (next) *next++ = 0;
332 else next = entry + strlenW(entry);
333 add_load_order_set( entry );
337 /* sort the array for quick lookup */
339 qsort(env_list.order, env_list.count, sizeof(env_list.order[0]), cmp_sort_func);
341 /* Note: we don't free the Unicode string because the
342 * stored module names point inside it */
346 /***************************************************************************
349 * Get the load order for a given module from the WINEDLLOVERRIDES environment variable.
351 static inline BOOL get_env_load_order( const WCHAR *module, enum loadorder_type lo[] )
353 module_loadorder_t tmp, *res = NULL;
355 tmp.modulename = module;
356 /* some bsearch implementations (Solaris) are buggy when the number of items is 0 */
357 if (env_list.count &&
358 (res = bsearch(&tmp, env_list.order, env_list.count, sizeof(env_list.order[0]), cmp_sort_func)))
359 memcpy( lo, res->loadorder, sizeof(res->loadorder) );
360 return (res != NULL);
364 /***************************************************************************
365 * get_default_load_order
367 * Get the load order for a given module from the default list.
369 static inline BOOL get_default_load_order( const WCHAR *module, enum loadorder_type lo[] )
371 const int count = sizeof(default_builtins) / sizeof(default_builtins[0]);
372 if (!bsearch( module, default_builtins, count, sizeof(default_builtins[0]), strcmp_func ))
374 lo[0] = LOADORDER_BI;
375 lo[1] = LOADORDER_INVALID;
380 /***************************************************************************
383 * Open the registry key to the app-specific DllOverrides list.
385 static HKEY open_app_key( const WCHAR *app_name, const WCHAR *module )
387 OBJECT_ATTRIBUTES attr;
388 UNICODE_STRING nameW;
391 static const WCHAR AppDefaultsW[] = {'M','a','c','h','i','n','e','\\',
392 'S','o','f','t','w','a','r','e','\\',
393 'W','i','n','e','\\',
394 'W','i','n','e','\\',
395 'C','o','n','f','i','g','\\',
396 'A','p','p','D','e','f','a','u','l','t','s','\\',0};
397 static const WCHAR DllOverridesW[] = {'\\','D','l','l','O','v','e','r','r','i','d','e','s',0};
399 str = RtlAllocateHeap( GetProcessHeap(), 0,
400 sizeof(AppDefaultsW) + sizeof(DllOverridesW) +
401 strlenW(app_name) * sizeof(WCHAR) );
403 strcpyW( str, AppDefaultsW );
404 strcatW( str, app_name );
405 strcatW( str, DllOverridesW );
407 TRACE( "searching %s in %s\n", debugstr_w(module), debugstr_w(str) );
409 attr.Length = sizeof(attr);
410 attr.RootDirectory = 0;
411 attr.ObjectName = &nameW;
413 attr.SecurityDescriptor = NULL;
414 attr.SecurityQualityOfService = NULL;
415 RtlInitUnicodeString( &nameW, str );
417 if (NtOpenKey( &hkey, KEY_ALL_ACCESS, &attr )) hkey = 0;
418 RtlFreeHeap( GetProcessHeap(), 0, str );
423 /***************************************************************************
426 * Load the registry loadorder value for a given module.
428 static BOOL get_registry_value( HKEY hkey, const WCHAR *module, enum loadorder_type lo[] )
430 UNICODE_STRING valueW;
435 RtlInitUnicodeString( &valueW, module );
437 if ((ret = !NtQueryValueKey( hkey, &valueW, KeyValuePartialInformation,
438 buffer, sizeof(buffer), &count )))
441 WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)buffer)->Data;
445 enum loadorder_type type = LOADORDER_INVALID;
447 while (*str == ',' || isspaceW(*str)) str++;
450 switch(tolowerW(*str))
452 case 'n': type = LOADORDER_DLL; break;
453 case 'b': type = LOADORDER_BI; break;
454 case 's': break; /* no longer supported, ignore */
455 case 0: break; /* end of string */
457 ERR("Invalid load order module-type %s, ignored\n", debugstr_w(str));
460 if (type != LOADORDER_INVALID)
462 for (i = 0; i < n; i++) if (lo[i] == type) break; /* already specified */
463 if (i == n) lo[n++] = type;
465 while (*str && *str != ',' && !isspaceW(*str)) str++;
467 lo[n] = LOADORDER_INVALID;
473 /***************************************************************************
474 * MODULE_GetLoadOrderW (internal)
476 * Locate the loadorder of a module.
477 * Any path is stripped from the path-argument and so are the extension
478 * '.dll' and '.exe'. A lookup in the table can yield an override for
479 * the specific dll. Otherwise the default load order is returned.
481 void MODULE_GetLoadOrderW( enum loadorder_type loadorder[], const WCHAR *app_name,
484 static const WCHAR DllOverridesW[] = {'M','a','c','h','i','n','e','\\',
485 'S','o','f','t','w','a','r','e','\\',
486 'W','i','n','e','\\',
487 'W','i','n','e','\\',
488 'C','o','n','f','i','g','\\',
489 'D','l','l','O','v','e','r','r','i','d','e','s',0};
491 static HKEY std_key = (HKEY)-1; /* key to standard section, cached */
494 WCHAR *module, *basename;
495 UNICODE_STRING path_str;
498 if (!init_done) init_load_order();
500 TRACE("looking for %s\n", debugstr_w(path));
502 loadorder[0] = LOADORDER_INVALID; /* in case something bad happens below */
504 /* Strip path information if the module resides in the system directory
506 RtlInitUnicodeString( &path_str, path );
507 if (RtlPrefixUnicodeString( &system_dir, &path_str, TRUE ))
509 const WCHAR *p = path + system_dir.Length / sizeof(WCHAR);
510 while (*p == '\\' || *p == '/') p++;
511 if (!strchrW( p, '\\' ) && !strchrW( p, '/' )) path = p;
514 if (!(len = strlenW(path))) return;
515 if (!(module = RtlAllocateHeap( GetProcessHeap(), 0, (len + 2) * sizeof(WCHAR) ))) return;
516 strcpyW( module+1, path ); /* reserve module[0] for the wildcard char */
518 if (len >= 4) remove_dll_ext( module + 1 + len - 4 );
520 /* check environment variable first */
521 if (get_env_load_order( module+1, loadorder ))
523 TRACE( "got environment %s for %s\n",
524 debugstr_loadorder(loadorder), debugstr_w(path) );
528 /* then explicit module name in AppDefaults */
531 app_key = open_app_key( app_name, module+1 );
532 if (app_key && get_registry_value( app_key, module+1, loadorder ))
534 TRACE( "got app defaults %s for %s\n",
535 debugstr_loadorder(loadorder), debugstr_w(path) );
540 /* then explicit module name in standard section */
541 if (std_key == (HKEY)-1)
543 OBJECT_ATTRIBUTES attr;
544 UNICODE_STRING nameW;
546 attr.Length = sizeof(attr);
547 attr.RootDirectory = 0;
548 attr.ObjectName = &nameW;
550 attr.SecurityDescriptor = NULL;
551 attr.SecurityQualityOfService = NULL;
552 RtlInitUnicodeString( &nameW, DllOverridesW );
554 if (NtOpenKey( &std_key, KEY_ALL_ACCESS, &attr )) std_key = 0;
557 if (std_key && get_registry_value( std_key, module+1, loadorder ))
559 TRACE( "got standard entry %s for %s\n",
560 debugstr_loadorder(loadorder), debugstr_w(path) );
564 /* then module basename preceded by '*' in environment */
565 basename = (WCHAR *)get_basename( module+1 );
567 if (get_env_load_order( basename-1, loadorder ))
569 TRACE( "got environment basename %s for %s\n",
570 debugstr_loadorder(loadorder), debugstr_w(path) );
574 /* then module basename preceded by '*' in AppDefaults */
575 if (app_key && get_registry_value( app_key, basename-1, loadorder ))
577 TRACE( "got app defaults basename %s for %s\n",
578 debugstr_loadorder(loadorder), debugstr_w(path) );
582 /* then module name preceded by '*' in standard section */
583 if (std_key && get_registry_value( std_key, basename-1, loadorder ))
585 TRACE( "got standard base name %s for %s\n",
586 debugstr_loadorder(loadorder), debugstr_w(path) );
590 if (basename == module+1) /* module doesn't contain a path */
592 static const WCHAR wildcardW[] = {'*',0};
594 /* then base name matching compiled-in defaults */
595 if (get_default_load_order( basename, loadorder ))
597 TRACE( "got compiled-in default %s for %s\n",
598 debugstr_loadorder(loadorder), debugstr_w(path) );
602 /* then wildcard entry in AppDefaults (only if no explicit path) */
603 if (app_key && get_registry_value( app_key, wildcardW, loadorder ))
605 TRACE( "got app defaults wildcard %s for %s\n",
606 debugstr_loadorder(loadorder), debugstr_w(path) );
610 /* then wildcard entry in standard section (only if no explicit path) */
611 if (std_key && get_registry_value( std_key, wildcardW, loadorder ))
613 TRACE( "got standard wildcard %s for %s\n",
614 debugstr_loadorder(loadorder), debugstr_w(path) );
618 /* and last the hard-coded default */
619 memcpy( loadorder, default_loadorder, sizeof(default_loadorder) );
620 TRACE( "got hardcoded default %s for %s\n",
621 debugstr_loadorder(loadorder), debugstr_w(path) );
623 else /* module contains an explicit path */
625 /* then base name without '*' in AppDefaults */
626 if (app_key && get_registry_value( app_key, basename, loadorder ))
628 TRACE( "got basename app defaults %s for %s\n",
629 debugstr_loadorder(loadorder), debugstr_w(path) );
633 /* then base name without '*' in standard section */
634 if (std_key && get_registry_value( std_key, basename, loadorder ))
636 TRACE( "got basename standard entry %s for %s\n",
637 debugstr_loadorder(loadorder), debugstr_w(path) );
641 /* then base name matching compiled-in defaults */
642 if (get_default_load_order( basename, loadorder ))
644 TRACE( "got compiled-in default %s for %s\n",
645 debugstr_loadorder(loadorder), debugstr_w(path) );
649 /* and last the hard-coded default */
650 memcpy( loadorder, default_path_loadorder, sizeof(default_path_loadorder) );
651 TRACE( "got hardcoded path default %s for %s\n",
652 debugstr_loadorder(loadorder), debugstr_w(path) );
656 if (app_key) NtClose( app_key );
657 RtlFreeHeap( GetProcessHeap(), 0, module );