4 * Copyright (C) 1998 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"
31 #ifdef HAVE_VALGRIND_MEMCHECK_H
32 #include <valgrind/memcheck.h>
36 #define WIN32_NO_STATUS
48 unsigned int hash_size
; /* size of hash table */
49 struct list names
[1]; /* array of hash entry lists */
54 static struct list object_list
= LIST_INIT(object_list
);
55 static struct list static_object_list
= LIST_INIT(static_object_list
);
57 void dump_objects(void)
61 LIST_FOR_EACH( p
, &static_object_list
)
63 struct object
*ptr
= LIST_ENTRY( p
, struct object
, obj_list
);
64 fprintf( stderr
, "%p:%d: ", ptr
, ptr
->refcount
);
65 dump_object_name( ptr
);
66 ptr
->ops
->dump( ptr
, 1 );
68 LIST_FOR_EACH( p
, &object_list
)
70 struct object
*ptr
= LIST_ENTRY( p
, struct object
, obj_list
);
71 fprintf( stderr
, "%p:%d: ", ptr
, ptr
->refcount
);
72 dump_object_name( ptr
);
73 ptr
->ops
->dump( ptr
, 1 );
77 void close_objects(void)
81 /* release the static objects */
82 while ((ptr
= list_head( &static_object_list
)))
84 struct object
*obj
= LIST_ENTRY( ptr
, struct object
, obj_list
);
85 /* move it back to the standard list before freeing */
86 list_remove( &obj
->obj_list
);
87 list_add_head( &object_list
, &obj
->obj_list
);
88 release_object( obj
);
91 dump_objects(); /* dump any remaining objects */
94 #endif /* DEBUG_OBJECTS */
96 /*****************************************************************/
98 /* mark a block of memory as uninitialized for debugging purposes */
99 static inline void mark_block_uninitialized( void *ptr
, size_t size
)
101 memset( ptr
, 0x55, size
);
102 #if defined(VALGRIND_MAKE_MEM_UNDEFINED)
103 VALGRIND_DISCARD( VALGRIND_MAKE_MEM_UNDEFINED( ptr
, size
));
104 #elif defined(VALGRIND_MAKE_WRITABLE)
105 VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr
, size
));
109 /* malloc replacement */
110 void *mem_alloc( size_t size
)
112 void *ptr
= malloc( size
);
113 if (ptr
) mark_block_uninitialized( ptr
, size
);
114 else set_error( STATUS_NO_MEMORY
);
118 /* duplicate a block of memory */
119 void *memdup( const void *data
, size_t len
)
121 void *ptr
= malloc( len
);
122 if (ptr
) memcpy( ptr
, data
, len
);
123 else set_error( STATUS_NO_MEMORY
);
128 /*****************************************************************/
130 void namespace_add( struct namespace *namespace, struct object_name
*ptr
)
132 unsigned int hash
= hash_strW( ptr
->name
, ptr
->len
, namespace->hash_size
);
134 list_add_head( &namespace->names
[hash
], &ptr
->entry
);
137 /* allocate a name for an object */
138 static struct object_name
*alloc_name( const struct unicode_str
*name
)
140 struct object_name
*ptr
;
142 if ((ptr
= mem_alloc( sizeof(*ptr
) + name
->len
- sizeof(ptr
->name
) )))
144 ptr
->len
= name
->len
;
146 memcpy( ptr
->name
, name
->str
, name
->len
);
151 /* get the name of an existing object */
152 const WCHAR
*get_object_name( struct object
*obj
, data_size_t
*len
)
154 struct object_name
*ptr
= obj
->name
;
155 if (!ptr
) return NULL
;
160 /* get the full path name of an existing object */
161 WCHAR
*get_object_full_name( struct object
*obj
, data_size_t
*ret_len
)
163 static const WCHAR backslash
= '\\';
164 struct object
*ptr
= obj
;
168 while (ptr
&& ptr
->name
)
170 struct object_name
*name
= ptr
->name
;
171 len
+= name
->len
+ sizeof(WCHAR
);
174 if (!len
) return NULL
;
175 if (!(ret
= malloc( len
))) return NULL
;
178 while (obj
&& obj
->name
)
180 struct object_name
*name
= obj
->name
;
181 memcpy( ret
+ len
- name
->len
, name
->name
, name
->len
);
182 len
-= name
->len
+ sizeof(WCHAR
);
183 memcpy( ret
+ len
, &backslash
, sizeof(WCHAR
) );
189 /* allocate and initialize an object */
190 void *alloc_object( const struct object_ops
*ops
)
192 struct object
*obj
= mem_alloc( ops
->size
);
196 obj
->handle_count
= 0;
200 list_init( &obj
->wait_queue
);
202 list_add_head( &object_list
, &obj
->obj_list
);
209 /* free an object once it has been destroyed */
210 static void free_object( struct object
*obj
)
214 list_remove( &obj
->obj_list
);
215 memset( obj
, 0xaa, obj
->ops
->size
);
220 /* find an object by name starting from the specified root */
221 /* if it doesn't exist, its parent is returned, and name_left contains the remaining name */
222 struct object
*lookup_named_object( struct object
*root
, const struct unicode_str
*name
,
223 unsigned int attr
, struct unicode_str
*name_left
)
225 struct object
*obj
, *parent
;
226 struct unicode_str name_tmp
= *name
, *ptr
= &name_tmp
;
230 /* if root is specified path shouldn't start with backslash */
231 if (name_tmp
.len
&& name_tmp
.str
[0] == '\\')
233 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD
);
236 parent
= grab_object( root
);
240 if (!name_tmp
.len
|| name_tmp
.str
[0] != '\\')
242 set_error( STATUS_OBJECT_PATH_SYNTAX_BAD
);
245 /* skip leading backslash */
247 name_tmp
.len
-= sizeof(WCHAR
);
248 parent
= get_root_directory();
251 if (!name_tmp
.len
) ptr
= NULL
; /* special case for empty path */
255 while ((obj
= parent
->ops
->lookup_name( parent
, ptr
, attr
)))
257 /* move to the next element */
258 release_object ( parent
);
263 release_object( parent
);
267 if (name_left
) *name_left
= name_tmp
;
271 /* return length of first path element in name */
272 data_size_t
get_path_element( const WCHAR
*name
, data_size_t len
)
276 for (i
= 0; i
< len
/ sizeof(WCHAR
); i
++) if (name
[i
] == '\\') break;
277 return i
* sizeof(WCHAR
);
280 static struct object
*create_object( struct object
*parent
, const struct object_ops
*ops
,
281 const struct unicode_str
*name
, const struct security_descriptor
*sd
)
284 struct object_name
*name_ptr
;
286 if (!(name_ptr
= alloc_name( name
))) return NULL
;
287 if (!(obj
= alloc_object( ops
))) goto failed
;
288 if (sd
&& !default_set_sd( obj
, sd
, OWNER_SECURITY_INFORMATION
| GROUP_SECURITY_INFORMATION
|
289 DACL_SECURITY_INFORMATION
| SACL_SECURITY_INFORMATION
))
291 if (!obj
->ops
->link_name( obj
, name_ptr
, parent
)) goto failed
;
294 obj
->name
= name_ptr
;
298 if (obj
) free_object( obj
);
303 /* create an object as named child under the specified parent */
304 void *create_named_object( struct object
*parent
, const struct object_ops
*ops
,
305 const struct unicode_str
*name
, unsigned int attributes
,
306 const struct security_descriptor
*sd
)
308 struct object
*obj
, *new_obj
;
309 struct unicode_str new_name
;
313 if (!name
|| !name
->len
)
315 if (!(new_obj
= alloc_object( ops
))) return NULL
;
316 if (sd
&& !default_set_sd( new_obj
, sd
, OWNER_SECURITY_INFORMATION
| GROUP_SECURITY_INFORMATION
|
317 DACL_SECURITY_INFORMATION
| SACL_SECURITY_INFORMATION
))
319 free_object( new_obj
);
325 if (!(obj
= lookup_named_object( parent
, name
, attributes
, &new_name
))) return NULL
;
329 if (attributes
& OBJ_OPENIF
&& obj
->ops
== ops
)
330 set_error( STATUS_OBJECT_NAME_EXISTS
);
333 release_object( obj
);
335 if (attributes
& OBJ_OPENIF
)
336 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
338 set_error( STATUS_OBJECT_NAME_COLLISION
);
343 new_obj
= create_object( obj
, ops
, &new_name
, sd
);
344 release_object( obj
);
348 /* open a object by name under the specified parent */
349 void *open_named_object( struct object
*parent
, const struct object_ops
*ops
,
350 const struct unicode_str
*name
, unsigned int attributes
)
352 struct unicode_str name_left
;
355 if ((obj
= lookup_named_object( parent
, name
, attributes
, &name_left
)))
357 if (name_left
.len
) /* not fully parsed */
358 set_error( STATUS_OBJECT_NAME_NOT_FOUND
);
359 else if (ops
&& obj
->ops
!= ops
)
360 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
364 release_object( obj
);
369 /* recursive helper for dump_object_name */
370 static void dump_name( struct object
*obj
)
372 struct object_name
*name
= obj
->name
;
375 if (name
->parent
) dump_name( name
->parent
);
376 fputs( "\\\\", stderr
);
377 dump_strW( name
->name
, name
->len
, stderr
, "[]" );
380 /* dump the name of an object to stderr */
381 void dump_object_name( struct object
*obj
)
383 if (!obj
->name
) return;
384 fputc( '[', stderr
);
386 fputs( "] ", stderr
);
389 /* unlink a named object from its namespace, without freeing the object itself */
390 void unlink_named_object( struct object
*obj
)
392 struct object_name
*name_ptr
= obj
->name
;
394 if (!name_ptr
) return;
396 obj
->ops
->unlink_name( obj
, name_ptr
);
397 if (name_ptr
->parent
) release_object( name_ptr
->parent
);
401 /* mark an object as being stored statically, i.e. only released at shutdown */
402 void make_object_static( struct object
*obj
)
405 list_remove( &obj
->obj_list
);
406 list_add_head( &static_object_list
, &obj
->obj_list
);
410 /* grab an object (i.e. increment its refcount) and return the object */
411 struct object
*grab_object( void *ptr
)
413 struct object
*obj
= (struct object
*)ptr
;
414 assert( obj
->refcount
< INT_MAX
);
419 /* release an object (i.e. decrement its refcount) */
420 void release_object( void *ptr
)
422 struct object
*obj
= (struct object
*)ptr
;
423 assert( obj
->refcount
);
424 if (!--obj
->refcount
)
426 assert( !obj
->handle_count
);
427 /* if the refcount is 0, nobody can be in the wait queue */
428 assert( list_empty( &obj
->wait_queue
));
429 free_kernel_objects( obj
);
430 unlink_named_object( obj
);
431 obj
->ops
->destroy( obj
);
436 /* find an object by its name; the refcount is incremented */
437 struct object
*find_object( const struct namespace *namespace, const struct unicode_str
*name
,
438 unsigned int attributes
)
440 const struct list
*list
;
443 if (!name
|| !name
->len
) return NULL
;
445 list
= &namespace->names
[ hash_strW( name
->str
, name
->len
, namespace->hash_size
) ];
446 LIST_FOR_EACH( p
, list
)
448 const struct object_name
*ptr
= LIST_ENTRY( p
, struct object_name
, entry
);
449 if (ptr
->len
!= name
->len
) continue;
450 if (attributes
& OBJ_CASE_INSENSITIVE
)
452 if (!memicmp_strW( ptr
->name
, name
->str
, name
->len
))
453 return grab_object( ptr
->obj
);
457 if (!memcmp( ptr
->name
, name
->str
, name
->len
))
458 return grab_object( ptr
->obj
);
464 /* find an object by its index; the refcount is incremented */
465 struct object
*find_object_index( const struct namespace *namespace, unsigned int index
)
469 /* FIXME: not efficient at all */
470 for (i
= 0; i
< namespace->hash_size
; i
++)
472 const struct object_name
*ptr
;
473 LIST_FOR_EACH_ENTRY( ptr
, &namespace->names
[i
], const struct object_name
, entry
)
475 if (!index
--) return grab_object( ptr
->obj
);
478 set_error( STATUS_NO_MORE_ENTRIES
);
482 /* allocate a namespace */
483 struct namespace *create_namespace( unsigned int hash_size
)
485 struct namespace *namespace;
488 namespace = mem_alloc( sizeof(*namespace) + (hash_size
- 1) * sizeof(namespace->names
[0]) );
491 namespace->hash_size
= hash_size
;
492 for (i
= 0; i
< hash_size
; i
++) list_init( &namespace->names
[i
] );
497 /* functions for unimplemented/default object operations */
499 struct object_type
*no_get_type( struct object
*obj
)
504 int no_add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
506 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
510 void no_satisfied( struct object
*obj
, struct wait_queue_entry
*entry
)
514 int no_signal( struct object
*obj
, unsigned int access
)
516 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
520 struct fd
*no_get_fd( struct object
*obj
)
522 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
526 unsigned int no_map_access( struct object
*obj
, unsigned int access
)
528 if (access
& GENERIC_READ
) access
|= STANDARD_RIGHTS_READ
;
529 if (access
& GENERIC_WRITE
) access
|= STANDARD_RIGHTS_WRITE
;
530 if (access
& GENERIC_EXECUTE
) access
|= STANDARD_RIGHTS_EXECUTE
;
531 if (access
& GENERIC_ALL
) access
|= STANDARD_RIGHTS_ALL
;
532 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
535 struct security_descriptor
*default_get_sd( struct object
*obj
)
540 int set_sd_defaults_from_token( struct object
*obj
, const struct security_descriptor
*sd
,
541 unsigned int set_info
, struct token
*token
)
543 struct security_descriptor new_sd
, *new_sd_ptr
;
545 const SID
*owner
= NULL
, *group
= NULL
;
546 const ACL
*sacl
, *dacl
;
547 ACL
*replaced_sacl
= NULL
;
550 if (!set_info
) return 1;
552 new_sd
.control
= sd
->control
& ~SE_SELF_RELATIVE
;
554 if (set_info
& OWNER_SECURITY_INFORMATION
&& sd
->owner_len
)
556 owner
= sd_get_owner( sd
);
557 new_sd
.owner_len
= sd
->owner_len
;
559 else if (obj
->sd
&& obj
->sd
->owner_len
)
561 owner
= sd_get_owner( obj
->sd
);
562 new_sd
.owner_len
= obj
->sd
->owner_len
;
566 owner
= token_get_user( token
);
567 new_sd
.owner_len
= security_sid_len( owner
);
569 else new_sd
.owner_len
= 0;
571 if (set_info
& GROUP_SECURITY_INFORMATION
&& sd
->group_len
)
573 group
= sd_get_group( sd
);
574 new_sd
.group_len
= sd
->group_len
;
576 else if (obj
->sd
&& obj
->sd
->group_len
)
578 group
= sd_get_group( obj
->sd
);
579 new_sd
.group_len
= obj
->sd
->group_len
;
583 group
= token_get_primary_group( token
);
584 new_sd
.group_len
= security_sid_len( group
);
586 else new_sd
.group_len
= 0;
588 sacl
= sd_get_sacl( sd
, &present
);
589 if (set_info
& SACL_SECURITY_INFORMATION
&& present
)
591 new_sd
.control
|= SE_SACL_PRESENT
;
592 new_sd
.sacl_len
= sd
->sacl_len
;
594 else if (set_info
& LABEL_SECURITY_INFORMATION
&& present
)
596 const ACL
*old_sacl
= NULL
;
597 if (obj
->sd
&& obj
->sd
->control
& SE_SACL_PRESENT
) old_sacl
= sd_get_sacl( obj
->sd
, &present
);
598 if (!(replaced_sacl
= replace_security_labels( old_sacl
, sacl
))) return 0;
599 new_sd
.control
|= SE_SACL_PRESENT
;
600 new_sd
.sacl_len
= replaced_sacl
->AclSize
;
601 sacl
= replaced_sacl
;
605 if (obj
->sd
) sacl
= sd_get_sacl( obj
->sd
, &present
);
607 if (obj
->sd
&& present
)
609 new_sd
.control
|= SE_SACL_PRESENT
;
610 new_sd
.sacl_len
= obj
->sd
->sacl_len
;
616 dacl
= sd_get_dacl( sd
, &present
);
617 if (set_info
& DACL_SECURITY_INFORMATION
&& present
)
619 new_sd
.control
|= SE_DACL_PRESENT
;
620 new_sd
.dacl_len
= sd
->dacl_len
;
624 if (obj
->sd
) dacl
= sd_get_dacl( obj
->sd
, &present
);
626 if (obj
->sd
&& present
)
628 new_sd
.control
|= SE_DACL_PRESENT
;
629 new_sd
.dacl_len
= obj
->sd
->dacl_len
;
633 dacl
= token_get_default_dacl( token
);
634 new_sd
.control
|= SE_DACL_PRESENT
;
635 new_sd
.dacl_len
= dacl
->AclSize
;
637 else new_sd
.dacl_len
= 0;
640 ptr
= mem_alloc( sizeof(new_sd
) + new_sd
.owner_len
+ new_sd
.group_len
+
641 new_sd
.sacl_len
+ new_sd
.dacl_len
);
644 free( replaced_sacl
);
647 new_sd_ptr
= (struct security_descriptor
*)ptr
;
649 memcpy( ptr
, &new_sd
, sizeof(new_sd
) );
650 ptr
+= sizeof(new_sd
);
651 memcpy( ptr
, owner
, new_sd
.owner_len
);
652 ptr
+= new_sd
.owner_len
;
653 memcpy( ptr
, group
, new_sd
.group_len
);
654 ptr
+= new_sd
.group_len
;
655 memcpy( ptr
, sacl
, new_sd
.sacl_len
);
656 ptr
+= new_sd
.sacl_len
;
657 memcpy( ptr
, dacl
, new_sd
.dacl_len
);
659 free( replaced_sacl
);
661 obj
->sd
= new_sd_ptr
;
665 /** Set the security descriptor using the current primary token for defaults. */
666 int default_set_sd( struct object
*obj
, const struct security_descriptor
*sd
,
667 unsigned int set_info
)
669 return set_sd_defaults_from_token( obj
, sd
, set_info
, current
->process
->token
);
672 struct object
*no_lookup_name( struct object
*obj
, struct unicode_str
*name
,
675 if (!name
) set_error( STATUS_OBJECT_TYPE_MISMATCH
);
679 int no_link_name( struct object
*obj
, struct object_name
*name
, struct object
*parent
)
681 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
685 void default_unlink_name( struct object
*obj
, struct object_name
*name
)
687 list_remove( &name
->entry
);
690 struct object
*no_open_file( struct object
*obj
, unsigned int access
, unsigned int sharing
,
691 unsigned int options
)
693 set_error( STATUS_OBJECT_TYPE_MISMATCH
);
697 int no_close_handle( struct object
*obj
, struct process
*process
, obj_handle_t handle
)
699 return 1; /* ok to close */
702 void no_destroy( struct object
*obj
)