2 * Server-side thread management
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"
32 #include <sys/types.h>
40 #define WIN32_NO_STATUS
57 struct thread_wait
*next
; /* next wait structure for this thread */
58 struct thread
*thread
; /* owner thread */
59 int count
; /* count of objects */
61 void *cookie
; /* magic cookie to return to client */
62 struct timeval timeout
;
63 struct timeout_user
*user
;
64 struct wait_queue_entry queues
[1];
67 /* asynchronous procedure calls */
71 struct object obj
; /* object header */
72 struct list entry
; /* queue linked list */
73 struct thread
*caller
; /* thread that queued this apc */
74 struct object
*owner
; /* object that queued this apc */
75 int executed
; /* has it been executed by the client? */
76 apc_call_t call
; /* call arguments */
77 apc_result_t result
; /* call results once executed */
80 static void dump_thread_apc( struct object
*obj
, int verbose
);
81 static int thread_apc_signaled( struct object
*obj
, struct thread
*thread
);
82 static void thread_apc_destroy( struct object
*obj
);
83 static void clear_apc_queue( struct list
*queue
);
85 static const struct object_ops thread_apc_ops
=
87 sizeof(struct thread_apc
), /* size */
88 dump_thread_apc
, /* dump */
89 add_queue
, /* add_queue */
90 remove_queue
, /* remove_queue */
91 thread_apc_signaled
, /* signaled */
92 no_satisfied
, /* satisfied */
93 no_signal
, /* signal */
94 no_get_fd
, /* get_fd */
95 no_map_access
, /* map_access */
96 no_lookup_name
, /* lookup_name */
97 no_open_file
, /* open_file */
98 no_close_handle
, /* close_handle */
99 thread_apc_destroy
/* destroy */
103 /* thread operations */
105 static void dump_thread( struct object
*obj
, int verbose
);
106 static int thread_signaled( struct object
*obj
, struct thread
*thread
);
107 static unsigned int thread_map_access( struct object
*obj
, unsigned int access
);
108 static void thread_poll_event( struct fd
*fd
, int event
);
109 static void destroy_thread( struct object
*obj
);
111 static const struct object_ops thread_ops
=
113 sizeof(struct thread
), /* size */
114 dump_thread
, /* dump */
115 add_queue
, /* add_queue */
116 remove_queue
, /* remove_queue */
117 thread_signaled
, /* signaled */
118 no_satisfied
, /* satisfied */
119 no_signal
, /* signal */
120 no_get_fd
, /* get_fd */
121 thread_map_access
, /* map_access */
122 no_lookup_name
, /* lookup_name */
123 no_open_file
, /* open_file */
124 no_close_handle
, /* close_handle */
125 destroy_thread
/* destroy */
128 static const struct fd_ops thread_fd_ops
=
130 NULL
, /* get_poll_events */
131 thread_poll_event
, /* poll_event */
132 no_flush
, /* flush */
133 no_get_fd_type
, /* get_fd_type */
134 no_queue_async
, /* queue_async */
135 NULL
, /* reselect_async */
136 no_cancel_async
/* cancel_async */
139 static struct list thread_list
= LIST_INIT(thread_list
);
141 /* initialize the structure for a newly allocated thread */
142 static inline void init_thread_structure( struct thread
*thread
)
146 thread
->unix_pid
= -1; /* not known yet */
147 thread
->unix_tid
= -1; /* not known yet */
148 thread
->context
= NULL
;
149 thread
->suspend_context
= NULL
;
151 thread
->debug_ctx
= NULL
;
152 thread
->debug_event
= NULL
;
153 thread
->debug_break
= 0;
154 thread
->queue
= NULL
;
157 thread
->req_data
= NULL
;
158 thread
->req_toread
= 0;
159 thread
->reply_data
= NULL
;
160 thread
->reply_towrite
= 0;
161 thread
->request_fd
= NULL
;
162 thread
->reply_fd
= NULL
;
163 thread
->wait_fd
= NULL
;
164 thread
->state
= RUNNING
;
165 thread
->exit_code
= 0;
166 thread
->priority
= 0;
167 thread
->affinity
= 1;
169 thread
->desktop_users
= 0;
170 thread
->token
= NULL
;
172 thread
->creation_time
= current_time
;
173 thread
->exit_time
.tv_sec
= thread
->exit_time
.tv_usec
= 0;
175 list_init( &thread
->mutex_list
);
176 list_init( &thread
->system_apc
);
177 list_init( &thread
->user_apc
);
179 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
180 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
183 /* check if address looks valid for a client-side data structure (TEB etc.) */
184 static inline int is_valid_address( void *addr
)
186 return addr
&& !((unsigned long)addr
% sizeof(int));
189 /* create a new thread */
190 struct thread
*create_thread( int fd
, struct process
*process
)
192 struct thread
*thread
;
194 if (!(thread
= alloc_object( &thread_ops
))) return NULL
;
196 init_thread_structure( thread
);
198 thread
->process
= (struct process
*)grab_object( process
);
199 thread
->desktop
= process
->desktop
;
200 if (!current
) current
= thread
;
202 list_add_head( &thread_list
, &thread
->entry
);
204 if (!(thread
->id
= alloc_ptid( thread
)))
206 release_object( thread
);
209 if (!(thread
->request_fd
= create_anonymous_fd( &thread_fd_ops
, fd
, &thread
->obj
, 0 )))
211 release_object( thread
);
215 set_fd_events( thread
->request_fd
, POLLIN
); /* start listening to events */
216 add_process_thread( thread
->process
, thread
);
220 /* handle a client event */
221 static void thread_poll_event( struct fd
*fd
, int event
)
223 struct thread
*thread
= get_fd_user( fd
);
224 assert( thread
->obj
.ops
== &thread_ops
);
226 if (event
& (POLLERR
| POLLHUP
)) kill_thread( thread
, 0 );
227 else if (event
& POLLIN
) read_request( thread
);
228 else if (event
& POLLOUT
) write_reply( thread
);
231 /* cleanup everything that is no longer needed by a dead thread */
232 /* used by destroy_thread and kill_thread */
233 static void cleanup_thread( struct thread
*thread
)
237 clear_apc_queue( &thread
->system_apc
);
238 clear_apc_queue( &thread
->user_apc
);
239 free( thread
->req_data
);
240 free( thread
->reply_data
);
241 if (thread
->request_fd
) release_object( thread
->request_fd
);
242 if (thread
->reply_fd
) release_object( thread
->reply_fd
);
243 if (thread
->wait_fd
) release_object( thread
->wait_fd
);
244 free( thread
->suspend_context
);
245 free_msg_queue( thread
);
246 cleanup_clipboard_thread(thread
);
247 destroy_thread_windows( thread
);
248 close_thread_desktop( thread
);
249 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
251 if (thread
->inflight
[i
].client
!= -1)
253 close( thread
->inflight
[i
].server
);
254 thread
->inflight
[i
].client
= thread
->inflight
[i
].server
= -1;
257 thread
->req_data
= NULL
;
258 thread
->reply_data
= NULL
;
259 thread
->request_fd
= NULL
;
260 thread
->reply_fd
= NULL
;
261 thread
->wait_fd
= NULL
;
262 thread
->context
= NULL
;
263 thread
->suspend_context
= NULL
;
267 /* destroy a thread when its refcount is 0 */
268 static void destroy_thread( struct object
*obj
)
270 struct thread
*thread
= (struct thread
*)obj
;
271 assert( obj
->ops
== &thread_ops
);
273 assert( !thread
->debug_ctx
); /* cannot still be debugging something */
274 list_remove( &thread
->entry
);
275 cleanup_thread( thread
);
276 release_object( thread
->process
);
277 if (thread
->id
) free_ptid( thread
->id
);
278 if (thread
->token
) release_object( thread
->token
);
281 /* dump a thread on stdout for debugging purposes */
282 static void dump_thread( struct object
*obj
, int verbose
)
284 struct thread
*thread
= (struct thread
*)obj
;
285 assert( obj
->ops
== &thread_ops
);
287 fprintf( stderr
, "Thread id=%04x unix pid=%d unix tid=%d teb=%p state=%d\n",
288 thread
->id
, thread
->unix_pid
, thread
->unix_tid
, thread
->teb
, thread
->state
);
291 static int thread_signaled( struct object
*obj
, struct thread
*thread
)
293 struct thread
*mythread
= (struct thread
*)obj
;
294 return (mythread
->state
== TERMINATED
);
297 static unsigned int thread_map_access( struct object
*obj
, unsigned int access
)
299 if (access
& GENERIC_READ
) access
|= STANDARD_RIGHTS_READ
| SYNCHRONIZE
;
300 if (access
& GENERIC_WRITE
) access
|= STANDARD_RIGHTS_WRITE
| SYNCHRONIZE
;
301 if (access
& GENERIC_EXECUTE
) access
|= STANDARD_RIGHTS_EXECUTE
;
302 if (access
& GENERIC_ALL
) access
|= THREAD_ALL_ACCESS
;
303 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
306 static void dump_thread_apc( struct object
*obj
, int verbose
)
308 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
309 assert( obj
->ops
== &thread_apc_ops
);
311 fprintf( stderr
, "APC owner=%p type=%u\n", apc
->owner
, apc
->call
.type
);
314 static int thread_apc_signaled( struct object
*obj
, struct thread
*thread
)
316 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
317 return apc
->executed
;
320 static void thread_apc_destroy( struct object
*obj
)
322 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
323 if (apc
->caller
) release_object( apc
->caller
);
324 if (apc
->owner
) release_object( apc
->owner
);
327 /* queue an async procedure call */
328 static struct thread_apc
*create_apc( struct object
*owner
, const apc_call_t
*call_data
)
330 struct thread_apc
*apc
;
332 if ((apc
= alloc_object( &thread_apc_ops
)))
334 apc
->call
= *call_data
;
338 apc
->result
.type
= APC_NONE
;
339 if (owner
) grab_object( owner
);
344 /* get a thread pointer from a thread id (and increment the refcount) */
345 struct thread
*get_thread_from_id( thread_id_t id
)
347 struct object
*obj
= get_ptid_entry( id
);
349 if (obj
&& obj
->ops
== &thread_ops
) return (struct thread
*)grab_object( obj
);
350 set_error( STATUS_INVALID_CID
);
354 /* get a thread from a handle (and increment the refcount) */
355 struct thread
*get_thread_from_handle( obj_handle_t handle
, unsigned int access
)
357 return (struct thread
*)get_handle_obj( current
->process
, handle
,
358 access
, &thread_ops
);
361 /* find a thread from a Unix tid */
362 struct thread
*get_thread_from_tid( int tid
)
364 struct thread
*thread
;
366 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
368 if (thread
->unix_tid
== tid
) return thread
;
373 /* find a thread from a Unix pid */
374 struct thread
*get_thread_from_pid( int pid
)
376 struct thread
*thread
;
378 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
380 if (thread
->unix_pid
== pid
) return thread
;
385 /* set all information about a thread */
386 static void set_thread_info( struct thread
*thread
,
387 const struct set_thread_info_request
*req
)
389 if (req
->mask
& SET_THREAD_INFO_PRIORITY
)
390 thread
->priority
= req
->priority
;
391 if (req
->mask
& SET_THREAD_INFO_AFFINITY
)
393 if (req
->affinity
!= 1) set_error( STATUS_INVALID_PARAMETER
);
394 else thread
->affinity
= req
->affinity
;
396 if (req
->mask
& SET_THREAD_INFO_TOKEN
)
397 security_set_thread_token( thread
, req
->token
);
400 /* stop a thread (at the Unix level) */
401 void stop_thread( struct thread
*thread
)
403 if (thread
->context
) return; /* already inside a debug event, no need for a signal */
404 /* can't stop a thread while initialisation is in progress */
405 if (is_process_init_done(thread
->process
)) send_thread_signal( thread
, SIGUSR1
);
408 /* suspend a thread */
409 static int suspend_thread( struct thread
*thread
)
411 int old_count
= thread
->suspend
;
412 if (thread
->suspend
< MAXIMUM_SUSPEND_COUNT
)
414 if (!(thread
->process
->suspend
+ thread
->suspend
++)) stop_thread( thread
);
416 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED
);
420 /* resume a thread */
421 static int resume_thread( struct thread
*thread
)
423 int old_count
= thread
->suspend
;
424 if (thread
->suspend
> 0)
426 if (!(--thread
->suspend
+ thread
->process
->suspend
)) wake_thread( thread
);
431 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
432 int add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
436 list_add_tail( &obj
->wait_queue
, &entry
->entry
);
440 /* remove a thread from an object wait queue */
441 void remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
443 list_remove( &entry
->entry
);
444 release_object( obj
);
448 static void end_wait( struct thread
*thread
)
450 struct thread_wait
*wait
= thread
->wait
;
451 struct wait_queue_entry
*entry
;
455 thread
->wait
= wait
->next
;
456 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
457 entry
->obj
->ops
->remove_queue( entry
->obj
, entry
);
458 if (wait
->user
) remove_timeout_user( wait
->user
);
462 /* build the thread wait structure */
463 static int wait_on( int count
, struct object
*objects
[], int flags
, const abs_time_t
*timeout
)
465 struct thread_wait
*wait
;
466 struct wait_queue_entry
*entry
;
469 if (!(wait
= mem_alloc( sizeof(*wait
) + (count
-1) * sizeof(*entry
) ))) return 0;
470 wait
->next
= current
->wait
;
471 wait
->thread
= current
;
475 current
->wait
= wait
;
476 if (flags
& SELECT_TIMEOUT
)
478 wait
->timeout
.tv_sec
= timeout
->sec
;
479 wait
->timeout
.tv_usec
= timeout
->usec
;
482 for (i
= 0, entry
= wait
->queues
; i
< count
; i
++, entry
++)
484 struct object
*obj
= objects
[i
];
485 entry
->thread
= current
;
486 if (!obj
->ops
->add_queue( obj
, entry
))
496 /* check if the thread waiting condition is satisfied */
497 static int check_wait( struct thread
*thread
)
500 struct thread_wait
*wait
= thread
->wait
;
501 struct wait_queue_entry
*entry
= wait
->queues
;
503 /* Suspended threads may not acquire locks, but they can run system APCs */
504 if (thread
->process
->suspend
+ thread
->suspend
> 0)
506 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && !list_empty( &thread
->system_apc
))
507 return STATUS_USER_APC
;
512 if (wait
->flags
& SELECT_ALL
)
515 /* Note: we must check them all anyway, as some objects may
516 * want to do something when signaled, even if others are not */
517 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
518 not_ok
|= !entry
->obj
->ops
->signaled( entry
->obj
, thread
);
519 if (not_ok
) goto other_checks
;
520 /* Wait satisfied: tell it to all objects */
522 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
523 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
524 signaled
= STATUS_ABANDONED_WAIT_0
;
529 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
531 if (!entry
->obj
->ops
->signaled( entry
->obj
, thread
)) continue;
532 /* Wait satisfied: tell it to the object */
534 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
535 signaled
= i
+ STATUS_ABANDONED_WAIT_0
;
541 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && !list_empty(&thread
->system_apc
)) return STATUS_USER_APC
;
542 if ((wait
->flags
& SELECT_ALERTABLE
) && !list_empty(&thread
->user_apc
)) return STATUS_USER_APC
;
543 if (wait
->flags
& SELECT_TIMEOUT
)
545 if (!time_before( ¤t_time
, &wait
->timeout
)) return STATUS_TIMEOUT
;
550 /* send the wakeup signal to a thread */
551 static int send_thread_wakeup( struct thread
*thread
, void *cookie
, int signaled
)
553 struct wake_up_reply reply
;
556 reply
.cookie
= cookie
;
557 reply
.signaled
= signaled
;
558 if ((ret
= write( get_unix_fd( thread
->wait_fd
), &reply
, sizeof(reply
) )) == sizeof(reply
))
561 fatal_protocol_error( thread
, "partial wakeup write %d\n", ret
);
562 else if (errno
== EPIPE
)
563 kill_thread( thread
, 0 ); /* normal death */
565 fatal_protocol_perror( thread
, "write" );
569 /* attempt to wake up a thread */
570 /* return >0 if OK, 0 if the wait condition is still not satisfied */
571 int wake_thread( struct thread
*thread
)
576 for (count
= 0; thread
->wait
; count
++)
578 if ((signaled
= check_wait( thread
)) == -1) break;
580 cookie
= thread
->wait
->cookie
;
581 if (debug_level
) fprintf( stderr
, "%04x: *wakeup* signaled=%d cookie=%p\n",
582 thread
->id
, signaled
, cookie
);
584 if (send_thread_wakeup( thread
, cookie
, signaled
) == -1) /* error */
590 /* thread wait timeout */
591 static void thread_timeout( void *ptr
)
593 struct thread_wait
*wait
= ptr
;
594 struct thread
*thread
= wait
->thread
;
595 void *cookie
= wait
->cookie
;
598 if (thread
->wait
!= wait
) return; /* not the top-level wait, ignore it */
599 if (thread
->suspend
+ thread
->process
->suspend
> 0) return; /* suspended, ignore it */
601 if (debug_level
) fprintf( stderr
, "%04x: *wakeup* signaled=%d cookie=%p\n",
602 thread
->id
, (int)STATUS_TIMEOUT
, cookie
);
604 if (send_thread_wakeup( thread
, cookie
, STATUS_TIMEOUT
) == -1) return;
605 /* check if other objects have become signaled in the meantime */
606 wake_thread( thread
);
609 /* try signaling an event flag, a semaphore or a mutex */
610 static int signal_object( obj_handle_t handle
)
615 obj
= get_handle_obj( current
->process
, handle
, 0, NULL
);
618 ret
= obj
->ops
->signal( obj
, get_handle_access( current
->process
, handle
));
619 release_object( obj
);
624 /* select on a list of handles */
625 static void select_on( int count
, void *cookie
, const obj_handle_t
*handles
,
626 int flags
, const abs_time_t
*timeout
, obj_handle_t signal_obj
)
629 struct object
*objects
[MAXIMUM_WAIT_OBJECTS
];
631 if ((count
< 0) || (count
> MAXIMUM_WAIT_OBJECTS
))
633 set_error( STATUS_INVALID_PARAMETER
);
636 for (i
= 0; i
< count
; i
++)
638 if (!(objects
[i
] = get_handle_obj( current
->process
, handles
[i
], SYNCHRONIZE
, NULL
)))
642 if (i
< count
) goto done
;
643 if (!wait_on( count
, objects
, flags
, timeout
)) goto done
;
645 /* signal the object */
648 if (!signal_object( signal_obj
))
653 /* check if we woke ourselves up */
654 if (!current
->wait
) goto done
;
657 if ((ret
= check_wait( current
)) != -1)
659 /* condition is already satisfied */
665 /* now we need to wait */
666 if (flags
& SELECT_TIMEOUT
)
668 if (!(current
->wait
->user
= add_timeout_user( ¤t
->wait
->timeout
,
669 thread_timeout
, current
->wait
)))
675 current
->wait
->cookie
= cookie
;
676 set_error( STATUS_PENDING
);
679 while (--i
>= 0) release_object( objects
[i
] );
682 /* attempt to wake threads sleeping on the object wait queue */
683 void wake_up( struct object
*obj
, int max
)
685 struct list
*ptr
, *next
;
687 LIST_FOR_EACH_SAFE( ptr
, next
, &obj
->wait_queue
)
689 struct wait_queue_entry
*entry
= LIST_ENTRY( ptr
, struct wait_queue_entry
, entry
);
690 if (wake_thread( entry
->thread
))
692 if (max
&& !--max
) break;
697 /* return the apc queue to use for a given apc type */
698 static inline struct list
*get_apc_queue( struct thread
*thread
, enum apc_type type
)
705 return &thread
->user_apc
;
707 return &thread
->system_apc
;
711 /* queue an existing APC to a given thread */
712 static int queue_apc( struct process
*process
, struct thread
*thread
, struct thread_apc
*apc
)
716 if (!thread
) /* find a suitable thread inside the process */
718 struct thread
*candidate
;
720 /* first try to find a waiting thread */
721 LIST_FOR_EACH_ENTRY( candidate
, &process
->thread_list
, struct thread
, proc_entry
)
723 if (candidate
->state
== TERMINATED
) continue;
724 if (process
->suspend
|| candidate
->suspend
||
725 (candidate
->wait
&& (candidate
->wait
->flags
& SELECT_INTERRUPTIBLE
)))
733 /* then use the first one that accepts a signal */
734 LIST_FOR_EACH_ENTRY( candidate
, &process
->thread_list
, struct thread
, proc_entry
)
736 if (send_thread_signal( candidate
, SIGUSR1
))
743 if (!thread
) return 0; /* nothing found */
747 if (thread
->state
== TERMINATED
) return 0;
748 /* cancel a possible previous APC with the same owner */
749 if (apc
->owner
) thread_cancel_apc( thread
, apc
->owner
, apc
->call
.type
);
752 queue
= get_apc_queue( thread
, apc
->call
.type
);
754 list_add_tail( queue
, &apc
->entry
);
755 if (!list_prev( queue
, &apc
->entry
)) /* first one */
756 wake_thread( thread
);
761 /* queue an async procedure call */
762 int thread_queue_apc( struct thread
*thread
, struct object
*owner
, const apc_call_t
*call_data
)
764 struct thread_apc
*apc
;
767 if ((apc
= create_apc( owner
, call_data
)))
769 ret
= queue_apc( NULL
, thread
, apc
);
770 release_object( apc
);
775 /* cancel the async procedure call owned by a specific object */
776 void thread_cancel_apc( struct thread
*thread
, struct object
*owner
, enum apc_type type
)
778 struct thread_apc
*apc
;
779 struct list
*queue
= get_apc_queue( thread
, type
);
781 LIST_FOR_EACH_ENTRY( apc
, queue
, struct thread_apc
, entry
)
783 if (apc
->owner
!= owner
) continue;
784 list_remove( &apc
->entry
);
786 wake_up( &apc
->obj
, 0 );
787 release_object( apc
);
792 /* remove the head apc from the queue; the returned object must be released by the caller */
793 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
)
795 struct thread_apc
*apc
= NULL
;
796 struct list
*ptr
= list_head( &thread
->system_apc
);
798 if (!ptr
&& !system_only
) ptr
= list_head( &thread
->user_apc
);
801 apc
= LIST_ENTRY( ptr
, struct thread_apc
, entry
);
807 /* clear an APC queue, cancelling all the APCs on it */
808 static void clear_apc_queue( struct list
*queue
)
812 while ((ptr
= list_head( queue
)))
814 struct thread_apc
*apc
= LIST_ENTRY( ptr
, struct thread_apc
, entry
);
815 list_remove( &apc
->entry
);
817 wake_up( &apc
->obj
, 0 );
818 release_object( apc
);
822 /* add an fd to the inflight list */
823 /* return list index, or -1 on error */
824 int thread_add_inflight_fd( struct thread
*thread
, int client
, int server
)
828 if (server
== -1) return -1;
835 /* first check if we already have an entry for this fd */
836 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
837 if (thread
->inflight
[i
].client
== client
)
839 close( thread
->inflight
[i
].server
);
840 thread
->inflight
[i
].server
= server
;
844 /* now find a free spot to store it */
845 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
846 if (thread
->inflight
[i
].client
== -1)
848 thread
->inflight
[i
].client
= client
;
849 thread
->inflight
[i
].server
= server
;
855 /* get an inflight fd and purge it from the list */
856 /* the fd must be closed when no longer used */
857 int thread_get_inflight_fd( struct thread
*thread
, int client
)
861 if (client
== -1) return -1;
865 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
867 if (thread
->inflight
[i
].client
== client
)
869 ret
= thread
->inflight
[i
].server
;
870 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
874 } while (!receive_fd( thread
->process
)); /* in case it is still in the socket buffer */
878 /* kill a thread on the spot */
879 void kill_thread( struct thread
*thread
, int violent_death
)
881 if (thread
->state
== TERMINATED
) return; /* already killed */
882 thread
->state
= TERMINATED
;
883 thread
->exit_time
= current_time
;
884 if (current
== thread
) current
= NULL
;
886 fprintf( stderr
,"%04x: *killed* exit_code=%d\n",
887 thread
->id
, thread
->exit_code
);
890 while (thread
->wait
) end_wait( thread
);
891 send_thread_wakeup( thread
, NULL
, STATUS_PENDING
);
892 /* if it is waiting on the socket, we don't need to send a SIGTERM */
895 kill_console_processes( thread
, 0 );
896 debug_exit_thread( thread
);
897 abandon_mutexes( thread
);
898 wake_up( &thread
->obj
, 0 );
899 if (violent_death
) send_thread_signal( thread
, SIGTERM
);
900 cleanup_thread( thread
);
901 remove_process_thread( thread
->process
, thread
);
902 release_object( thread
);
905 /* trigger a breakpoint event in a given thread */
906 void break_thread( struct thread
*thread
)
908 struct debug_event_exception data
;
910 assert( thread
->context
);
912 data
.record
.ExceptionCode
= STATUS_BREAKPOINT
;
913 data
.record
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
914 data
.record
.ExceptionRecord
= NULL
;
915 data
.record
.ExceptionAddress
= get_context_ip( thread
->context
);
916 data
.record
.NumberParameters
= 0;
918 generate_debug_event( thread
, EXCEPTION_DEBUG_EVENT
, &data
);
919 thread
->debug_break
= 0;
922 /* take a snapshot of currently running threads */
923 struct thread_snapshot
*thread_snap( int *count
)
925 struct thread_snapshot
*snapshot
, *ptr
;
926 struct thread
*thread
;
929 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
930 if (thread
->state
!= TERMINATED
) total
++;
931 if (!total
|| !(snapshot
= mem_alloc( sizeof(*snapshot
) * total
))) return NULL
;
933 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
935 if (thread
->state
== TERMINATED
) continue;
936 ptr
->thread
= thread
;
937 ptr
->count
= thread
->obj
.refcount
;
938 ptr
->priority
= thread
->priority
;
939 grab_object( thread
);
946 /* gets the current impersonation token */
947 struct token
*thread_get_impersonation_token( struct thread
*thread
)
950 return thread
->token
;
952 return thread
->process
->token
;
955 /* create a new thread */
956 DECL_HANDLER(new_thread
)
958 struct thread
*thread
;
959 int request_fd
= thread_get_inflight_fd( current
, req
->request_fd
);
961 if (request_fd
== -1 || fcntl( request_fd
, F_SETFL
, O_NONBLOCK
) == -1)
963 if (request_fd
!= -1) close( request_fd
);
964 set_error( STATUS_INVALID_HANDLE
);
968 if ((thread
= create_thread( request_fd
, current
->process
)))
970 if (req
->suspend
) thread
->suspend
++;
971 reply
->tid
= get_thread_id( thread
);
972 if ((reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->attributes
)))
974 /* thread object will be released when the thread gets killed */
977 kill_thread( thread
, 1 );
981 /* initialize a new thread */
982 DECL_HANDLER(init_thread
)
984 struct process
*process
= current
->process
;
985 int reply_fd
= thread_get_inflight_fd( current
, req
->reply_fd
);
986 int wait_fd
= thread_get_inflight_fd( current
, req
->wait_fd
);
988 if (current
->reply_fd
) /* already initialised */
990 set_error( STATUS_INVALID_PARAMETER
);
994 if (reply_fd
== -1 || fcntl( reply_fd
, F_SETFL
, O_NONBLOCK
) == -1) goto error
;
996 current
->reply_fd
= create_anonymous_fd( &thread_fd_ops
, reply_fd
, ¤t
->obj
, 0 );
998 if (!current
->reply_fd
) goto error
;
1002 set_error( STATUS_TOO_MANY_OPENED_FILES
); /* most likely reason */
1005 if (!(current
->wait_fd
= create_anonymous_fd( &thread_fd_ops
, wait_fd
, ¤t
->obj
, 0 )))
1008 if (!is_valid_address(req
->teb
) || !is_valid_address(req
->peb
) || !is_valid_address(req
->ldt_copy
))
1010 set_error( STATUS_INVALID_PARAMETER
);
1014 current
->unix_pid
= req
->unix_pid
;
1015 current
->unix_tid
= req
->unix_tid
;
1016 current
->teb
= req
->teb
;
1018 if (!process
->peb
) /* first thread, initialize the process too */
1020 process
->unix_pid
= current
->unix_pid
;
1021 process
->peb
= req
->peb
;
1022 process
->ldt_copy
= req
->ldt_copy
;
1023 reply
->info_size
= init_process( current
);
1027 if (process
->unix_pid
!= current
->unix_pid
)
1028 process
->unix_pid
= -1; /* can happen with linuxthreads */
1029 if (current
->suspend
+ process
->suspend
> 0) stop_thread( current
);
1030 generate_debug_event( current
, CREATE_THREAD_DEBUG_EVENT
, req
->entry
);
1032 debug_level
= max( debug_level
, req
->debug_level
);
1034 reply
->pid
= get_process_id( process
);
1035 reply
->tid
= get_thread_id( current
);
1036 reply
->version
= SERVER_PROTOCOL_VERSION
;
1037 reply
->server_start
.sec
= server_start_time
.tv_sec
;
1038 reply
->server_start
.usec
= server_start_time
.tv_usec
;
1042 if (reply_fd
!= -1) close( reply_fd
);
1043 if (wait_fd
!= -1) close( wait_fd
);
1046 /* terminate a thread */
1047 DECL_HANDLER(terminate_thread
)
1049 struct thread
*thread
;
1053 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_TERMINATE
)))
1055 thread
->exit_code
= req
->exit_code
;
1056 if (thread
!= current
) kill_thread( thread
, 1 );
1060 reply
->last
= (thread
->process
->running_threads
== 1);
1062 release_object( thread
);
1066 /* open a handle to a thread */
1067 DECL_HANDLER(open_thread
)
1069 struct thread
*thread
= get_thread_from_id( req
->tid
);
1074 reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->attributes
);
1075 release_object( thread
);
1079 /* fetch information about a thread */
1080 DECL_HANDLER(get_thread_info
)
1082 struct thread
*thread
;
1083 obj_handle_t handle
= req
->handle
;
1085 if (!handle
) thread
= get_thread_from_id( req
->tid_in
);
1086 else thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
);
1090 reply
->pid
= get_process_id( thread
->process
);
1091 reply
->tid
= get_thread_id( thread
);
1092 reply
->teb
= thread
->teb
;
1093 reply
->exit_code
= (thread
->state
== TERMINATED
) ? thread
->exit_code
: STATUS_PENDING
;
1094 reply
->priority
= thread
->priority
;
1095 reply
->affinity
= thread
->affinity
;
1096 reply
->creation_time
.sec
= thread
->creation_time
.tv_sec
;
1097 reply
->creation_time
.usec
= thread
->creation_time
.tv_usec
;
1098 reply
->exit_time
.sec
= thread
->exit_time
.tv_sec
;
1099 reply
->exit_time
.usec
= thread
->exit_time
.tv_usec
;
1100 reply
->last
= thread
->process
->running_threads
== 1;
1102 release_object( thread
);
1106 /* set information about a thread */
1107 DECL_HANDLER(set_thread_info
)
1109 struct thread
*thread
;
1111 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_INFORMATION
)))
1113 set_thread_info( thread
, req
);
1114 release_object( thread
);
1118 /* suspend a thread */
1119 DECL_HANDLER(suspend_thread
)
1121 struct thread
*thread
;
1123 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
1125 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
1126 else reply
->count
= suspend_thread( thread
);
1127 release_object( thread
);
1131 /* resume a thread */
1132 DECL_HANDLER(resume_thread
)
1134 struct thread
*thread
;
1136 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
1138 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
1139 else reply
->count
= resume_thread( thread
);
1140 release_object( thread
);
1144 /* select on a handle list */
1145 DECL_HANDLER(select
)
1147 int count
= get_req_data_size() / sizeof(obj_handle_t
);
1148 select_on( count
, req
->cookie
, get_req_data(), req
->flags
, &req
->timeout
, req
->signal
);
1151 /* queue an APC for a thread or process */
1152 DECL_HANDLER(queue_apc
)
1154 struct thread
*thread
= NULL
;
1155 struct process
*process
= NULL
;
1156 struct thread_apc
*apc
;
1158 if (!(apc
= create_apc( NULL
, &req
->call
))) return;
1160 switch (apc
->call
.type
)
1164 thread
= get_thread_from_handle( req
->thread
, THREAD_SET_CONTEXT
);
1166 case APC_VIRTUAL_ALLOC
:
1167 case APC_VIRTUAL_FREE
:
1168 case APC_VIRTUAL_PROTECT
:
1169 case APC_VIRTUAL_FLUSH
:
1170 case APC_VIRTUAL_LOCK
:
1171 case APC_VIRTUAL_UNLOCK
:
1172 case APC_UNMAP_VIEW
:
1173 process
= get_process_from_handle( req
->process
, PROCESS_VM_OPERATION
);
1175 case APC_VIRTUAL_QUERY
:
1176 process
= get_process_from_handle( req
->process
, PROCESS_QUERY_INFORMATION
);
1179 process
= get_process_from_handle( req
->process
, PROCESS_VM_OPERATION
);
1180 if (process
&& process
!= current
->process
)
1182 /* duplicate the handle into the target process */
1183 obj_handle_t handle
= duplicate_handle( current
->process
, apc
->call
.map_view
.handle
,
1184 process
, 0, 0, DUP_HANDLE_SAME_ACCESS
);
1185 if (handle
) apc
->call
.map_view
.handle
= handle
;
1188 release_object( process
);
1193 case APC_CREATE_THREAD
:
1194 process
= get_process_from_handle( req
->process
, PROCESS_CREATE_THREAD
);
1197 set_error( STATUS_INVALID_PARAMETER
);
1203 if (!queue_apc( NULL
, thread
, apc
)) set_error( STATUS_THREAD_IS_TERMINATING
);
1204 release_object( thread
);
1208 reply
->self
= (process
== current
->process
);
1211 obj_handle_t handle
= alloc_handle( current
->process
, apc
, SYNCHRONIZE
, 0 );
1214 if (queue_apc( process
, NULL
, apc
))
1216 apc
->caller
= (struct thread
*)grab_object( current
);
1217 reply
->handle
= handle
;
1221 close_handle( current
->process
, handle
);
1222 set_error( STATUS_PROCESS_IS_TERMINATING
);
1226 release_object( process
);
1229 release_object( apc
);
1232 /* get next APC to call */
1233 DECL_HANDLER(get_apc
)
1235 struct thread_apc
*apc
;
1236 int system_only
= !req
->alertable
;
1240 if (!(apc
= (struct thread_apc
*)get_handle_obj( current
->process
, req
->prev
,
1241 0, &thread_apc_ops
))) return;
1242 apc
->result
= req
->result
;
1244 if (apc
->result
.type
== APC_CREATE_THREAD
) /* transfer the handle to the caller process */
1246 obj_handle_t handle
= duplicate_handle( current
->process
, apc
->result
.create_thread
.handle
,
1247 apc
->caller
->process
, 0, 0, DUP_HANDLE_SAME_ACCESS
);
1248 close_handle( current
->process
, apc
->result
.create_thread
.handle
);
1249 apc
->result
.create_thread
.handle
= handle
;
1250 clear_error(); /* ignore errors from the above calls */
1252 else if (apc
->result
.type
== APC_ASYNC_IO
)
1254 if (apc
->owner
) async_set_result( apc
->owner
, apc
->result
.async_io
.status
);
1256 wake_up( &apc
->obj
, 0 );
1257 close_handle( current
->process
, req
->prev
);
1258 release_object( apc
);
1261 if (current
->suspend
+ current
->process
->suspend
> 0) system_only
= 1;
1265 if (!(apc
= thread_dequeue_apc( current
, system_only
)))
1268 set_error( STATUS_PENDING
);
1271 /* Optimization: ignore APC_NONE calls, they are only used to
1272 * wake up a thread, but since we got here the thread woke up already.
1274 if (apc
->call
.type
!= APC_NONE
) break;
1276 wake_up( &apc
->obj
, 0 );
1277 release_object( apc
);
1280 if ((reply
->handle
= alloc_handle( current
->process
, apc
, SYNCHRONIZE
, 0 )))
1281 reply
->call
= apc
->call
;
1282 release_object( apc
);
1285 /* Get the result of an APC call */
1286 DECL_HANDLER(get_apc_result
)
1288 struct thread_apc
*apc
;
1290 if (!(apc
= (struct thread_apc
*)get_handle_obj( current
->process
, req
->handle
,
1291 0, &thread_apc_ops
))) return;
1292 if (!apc
->executed
) set_error( STATUS_PENDING
);
1295 reply
->result
= apc
->result
;
1296 /* close the handle directly to avoid an extra round-trip */
1297 close_handle( current
->process
, req
->handle
);
1299 release_object( apc
);
1302 /* retrieve the current context of a thread */
1303 DECL_HANDLER(get_thread_context
)
1305 struct thread
*thread
;
1308 if (get_reply_max_size() < sizeof(CONTEXT
))
1310 set_error( STATUS_INVALID_PARAMETER
);
1313 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_GET_CONTEXT
))) return;
1317 if (thread
!= current
|| !thread
->suspend_context
)
1319 /* not suspended, shouldn't happen */
1320 set_error( STATUS_INVALID_PARAMETER
);
1324 if (thread
->context
== thread
->suspend_context
) thread
->context
= NULL
;
1325 set_reply_data_ptr( thread
->suspend_context
, sizeof(CONTEXT
) );
1326 thread
->suspend_context
= NULL
;
1329 else if (thread
!= current
&& !thread
->context
)
1331 /* thread is not suspended, retry (if it's still running) */
1332 if (thread
->state
!= RUNNING
) set_error( STATUS_ACCESS_DENIED
);
1333 else set_error( STATUS_PENDING
);
1335 else if ((context
= set_reply_data_size( sizeof(CONTEXT
) )))
1337 unsigned int flags
= get_context_system_regs( req
->flags
);
1339 memset( context
, 0, sizeof(CONTEXT
) );
1340 context
->ContextFlags
= get_context_cpu_flag();
1341 if (thread
->context
) copy_context( context
, thread
->context
, req
->flags
& ~flags
);
1342 if (flags
) get_thread_context( thread
, context
, flags
);
1344 reply
->self
= (thread
== current
);
1345 release_object( thread
);
1348 /* set the current context of a thread */
1349 DECL_HANDLER(set_thread_context
)
1351 struct thread
*thread
;
1353 if (get_req_data_size() < sizeof(CONTEXT
))
1355 set_error( STATUS_INVALID_PARAMETER
);
1358 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
))) return;
1362 if (thread
!= current
|| thread
->context
)
1364 /* nested suspend or exception, shouldn't happen */
1365 set_error( STATUS_INVALID_PARAMETER
);
1367 else if ((thread
->suspend_context
= mem_alloc( sizeof(CONTEXT
) )))
1369 memcpy( thread
->suspend_context
, get_req_data(), sizeof(CONTEXT
) );
1370 thread
->context
= thread
->suspend_context
;
1371 if (thread
->debug_break
) break_thread( thread
);
1374 else if (thread
!= current
&& !thread
->context
)
1376 /* thread is not suspended, retry (if it's still running) */
1377 if (thread
->state
!= RUNNING
) set_error( STATUS_ACCESS_DENIED
);
1378 else set_error( STATUS_PENDING
);
1382 const CONTEXT
*context
= get_req_data();
1383 unsigned int flags
= get_context_system_regs( req
->flags
);
1385 if (flags
) set_thread_context( thread
, context
, flags
);
1386 if (thread
->context
&& !get_error())
1387 copy_context( thread
->context
, context
, req
->flags
& ~flags
);
1389 reply
->self
= (thread
== current
);
1390 release_object( thread
);
1393 /* fetch a selector entry for a thread */
1394 DECL_HANDLER(get_selector_entry
)
1396 struct thread
*thread
;
1397 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
1399 get_selector_entry( thread
, req
->entry
, &reply
->base
, &reply
->limit
, &reply
->flags
);
1400 release_object( thread
);