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 object
*owner
; /* object that queued this apc */
74 int executed
; /* has it been executed by the client? */
75 apc_call_t call
; /* call arguments */
76 apc_result_t result
; /* call results once executed */
79 static void dump_thread_apc( struct object
*obj
, int verbose
);
80 static int thread_apc_signaled( struct object
*obj
, struct thread
*thread
);
81 static void clear_apc_queue( struct list
*queue
);
83 static const struct object_ops thread_apc_ops
=
85 sizeof(struct thread_apc
), /* size */
86 dump_thread_apc
, /* dump */
87 add_queue
, /* add_queue */
88 remove_queue
, /* remove_queue */
89 thread_apc_signaled
, /* signaled */
90 no_satisfied
, /* satisfied */
91 no_signal
, /* signal */
92 no_get_fd
, /* get_fd */
93 no_map_access
, /* map_access */
94 no_lookup_name
, /* lookup_name */
95 no_close_handle
, /* close_handle */
96 no_destroy
/* destroy */
100 /* thread operations */
102 static void dump_thread( struct object
*obj
, int verbose
);
103 static int thread_signaled( struct object
*obj
, struct thread
*thread
);
104 static unsigned int thread_map_access( struct object
*obj
, unsigned int access
);
105 static void thread_poll_event( struct fd
*fd
, int event
);
106 static void destroy_thread( struct object
*obj
);
108 static const struct object_ops thread_ops
=
110 sizeof(struct thread
), /* size */
111 dump_thread
, /* dump */
112 add_queue
, /* add_queue */
113 remove_queue
, /* remove_queue */
114 thread_signaled
, /* signaled */
115 no_satisfied
, /* satisfied */
116 no_signal
, /* signal */
117 no_get_fd
, /* get_fd */
118 thread_map_access
, /* map_access */
119 no_lookup_name
, /* lookup_name */
120 no_close_handle
, /* close_handle */
121 destroy_thread
/* destroy */
124 static const struct fd_ops thread_fd_ops
=
126 NULL
, /* get_poll_events */
127 thread_poll_event
, /* poll_event */
128 no_flush
, /* flush */
129 no_get_file_info
, /* get_file_info */
130 no_queue_async
, /* queue_async */
131 no_cancel_async
/* cancel_async */
134 static struct list thread_list
= LIST_INIT(thread_list
);
136 /* initialize the structure for a newly allocated thread */
137 inline static void init_thread_structure( struct thread
*thread
)
141 thread
->unix_pid
= -1; /* not known yet */
142 thread
->unix_tid
= -1; /* not known yet */
143 thread
->context
= NULL
;
144 thread
->suspend_context
= NULL
;
146 thread
->debug_ctx
= NULL
;
147 thread
->debug_event
= NULL
;
148 thread
->debug_break
= 0;
149 thread
->queue
= NULL
;
152 thread
->req_data
= NULL
;
153 thread
->req_toread
= 0;
154 thread
->reply_data
= NULL
;
155 thread
->reply_towrite
= 0;
156 thread
->request_fd
= NULL
;
157 thread
->reply_fd
= NULL
;
158 thread
->wait_fd
= NULL
;
159 thread
->state
= RUNNING
;
160 thread
->exit_code
= 0;
161 thread
->priority
= 0;
162 thread
->affinity
= 1;
164 thread
->desktop_users
= 0;
165 thread
->token
= NULL
;
167 thread
->creation_time
= current_time
;
168 thread
->exit_time
.tv_sec
= thread
->exit_time
.tv_usec
= 0;
170 list_init( &thread
->mutex_list
);
171 list_init( &thread
->system_apc
);
172 list_init( &thread
->user_apc
);
174 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
175 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
178 /* check if address looks valid for a client-side data structure (TEB etc.) */
179 static inline int is_valid_address( void *addr
)
181 return addr
&& !((unsigned long)addr
% sizeof(int));
184 /* create a new thread */
185 struct thread
*create_thread( int fd
, struct process
*process
)
187 struct thread
*thread
;
189 if (!(thread
= alloc_object( &thread_ops
))) return NULL
;
191 init_thread_structure( thread
);
193 thread
->process
= (struct process
*)grab_object( process
);
194 thread
->desktop
= process
->desktop
;
195 if (!current
) current
= thread
;
197 list_add_head( &thread_list
, &thread
->entry
);
199 if (!(thread
->id
= alloc_ptid( thread
)))
201 release_object( thread
);
204 if (!(thread
->request_fd
= create_anonymous_fd( &thread_fd_ops
, fd
, &thread
->obj
)))
206 release_object( thread
);
210 set_fd_events( thread
->request_fd
, POLLIN
); /* start listening to events */
211 add_process_thread( thread
->process
, thread
);
215 /* handle a client event */
216 static void thread_poll_event( struct fd
*fd
, int event
)
218 struct thread
*thread
= get_fd_user( fd
);
219 assert( thread
->obj
.ops
== &thread_ops
);
221 if (event
& (POLLERR
| POLLHUP
)) kill_thread( thread
, 0 );
222 else if (event
& POLLIN
) read_request( thread
);
223 else if (event
& POLLOUT
) write_reply( thread
);
226 /* cleanup everything that is no longer needed by a dead thread */
227 /* used by destroy_thread and kill_thread */
228 static void cleanup_thread( struct thread
*thread
)
232 clear_apc_queue( &thread
->system_apc
);
233 clear_apc_queue( &thread
->user_apc
);
234 free( thread
->req_data
);
235 free( thread
->reply_data
);
236 if (thread
->request_fd
) release_object( thread
->request_fd
);
237 if (thread
->reply_fd
) release_object( thread
->reply_fd
);
238 if (thread
->wait_fd
) release_object( thread
->wait_fd
);
239 free( thread
->suspend_context
);
240 free_msg_queue( thread
);
241 cleanup_clipboard_thread(thread
);
242 destroy_thread_windows( thread
);
243 close_thread_desktop( thread
);
244 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
246 if (thread
->inflight
[i
].client
!= -1)
248 close( thread
->inflight
[i
].server
);
249 thread
->inflight
[i
].client
= thread
->inflight
[i
].server
= -1;
252 thread
->req_data
= NULL
;
253 thread
->reply_data
= NULL
;
254 thread
->request_fd
= NULL
;
255 thread
->reply_fd
= NULL
;
256 thread
->wait_fd
= NULL
;
257 thread
->context
= NULL
;
258 thread
->suspend_context
= NULL
;
262 /* destroy a thread when its refcount is 0 */
263 static void destroy_thread( struct object
*obj
)
265 struct thread
*thread
= (struct thread
*)obj
;
266 assert( obj
->ops
== &thread_ops
);
268 assert( !thread
->debug_ctx
); /* cannot still be debugging something */
269 list_remove( &thread
->entry
);
270 cleanup_thread( thread
);
271 release_object( thread
->process
);
272 if (thread
->id
) free_ptid( thread
->id
);
273 if (thread
->token
) release_object( thread
->token
);
276 /* dump a thread on stdout for debugging purposes */
277 static void dump_thread( struct object
*obj
, int verbose
)
279 struct thread
*thread
= (struct thread
*)obj
;
280 assert( obj
->ops
== &thread_ops
);
282 fprintf( stderr
, "Thread id=%04x unix pid=%d unix tid=%d teb=%p state=%d\n",
283 thread
->id
, thread
->unix_pid
, thread
->unix_tid
, thread
->teb
, thread
->state
);
286 static int thread_signaled( struct object
*obj
, struct thread
*thread
)
288 struct thread
*mythread
= (struct thread
*)obj
;
289 return (mythread
->state
== TERMINATED
);
292 static unsigned int thread_map_access( struct object
*obj
, unsigned int access
)
294 if (access
& GENERIC_READ
) access
|= STANDARD_RIGHTS_READ
| SYNCHRONIZE
;
295 if (access
& GENERIC_WRITE
) access
|= STANDARD_RIGHTS_WRITE
| SYNCHRONIZE
;
296 if (access
& GENERIC_EXECUTE
) access
|= STANDARD_RIGHTS_EXECUTE
;
297 if (access
& GENERIC_ALL
) access
|= THREAD_ALL_ACCESS
;
298 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
301 static void dump_thread_apc( struct object
*obj
, int verbose
)
303 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
304 assert( obj
->ops
== &thread_apc_ops
);
306 fprintf( stderr
, "APC owner=%p type=%u\n", apc
->owner
, apc
->call
.type
);
309 static int thread_apc_signaled( struct object
*obj
, struct thread
*thread
)
311 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
312 return apc
->executed
;
315 /* queue an async procedure call */
316 static struct thread_apc
*create_apc( struct object
*owner
, const apc_call_t
*call_data
)
318 struct thread_apc
*apc
;
320 if ((apc
= alloc_object( &thread_apc_ops
)))
322 apc
->call
= *call_data
;
325 apc
->result
.type
= APC_NONE
;
330 /* get a thread pointer from a thread id (and increment the refcount) */
331 struct thread
*get_thread_from_id( thread_id_t id
)
333 struct object
*obj
= get_ptid_entry( id
);
335 if (obj
&& obj
->ops
== &thread_ops
) return (struct thread
*)grab_object( obj
);
336 set_error( STATUS_INVALID_CID
);
340 /* get a thread from a handle (and increment the refcount) */
341 struct thread
*get_thread_from_handle( obj_handle_t handle
, unsigned int access
)
343 return (struct thread
*)get_handle_obj( current
->process
, handle
,
344 access
, &thread_ops
);
347 /* find a thread from a Unix tid */
348 struct thread
*get_thread_from_tid( int tid
)
350 struct thread
*thread
;
352 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
354 if (thread
->unix_tid
== tid
) return thread
;
359 /* find a thread from a Unix pid */
360 struct thread
*get_thread_from_pid( int pid
)
362 struct thread
*thread
;
364 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
366 if (thread
->unix_pid
== pid
) return thread
;
371 /* set all information about a thread */
372 static void set_thread_info( struct thread
*thread
,
373 const struct set_thread_info_request
*req
)
375 if (req
->mask
& SET_THREAD_INFO_PRIORITY
)
376 thread
->priority
= req
->priority
;
377 if (req
->mask
& SET_THREAD_INFO_AFFINITY
)
379 if (req
->affinity
!= 1) set_error( STATUS_INVALID_PARAMETER
);
380 else thread
->affinity
= req
->affinity
;
382 if (req
->mask
& SET_THREAD_INFO_TOKEN
)
383 security_set_thread_token( thread
, req
->token
);
386 /* stop a thread (at the Unix level) */
387 void stop_thread( struct thread
*thread
)
389 if (thread
->context
) return; /* already inside a debug event, no need for a signal */
390 /* can't stop a thread while initialisation is in progress */
391 if (is_process_init_done(thread
->process
)) send_thread_signal( thread
, SIGUSR1
);
394 /* suspend a thread */
395 static int suspend_thread( struct thread
*thread
)
397 int old_count
= thread
->suspend
;
398 if (thread
->suspend
< MAXIMUM_SUSPEND_COUNT
)
400 if (!(thread
->process
->suspend
+ thread
->suspend
++)) stop_thread( thread
);
402 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED
);
406 /* resume a thread */
407 static int resume_thread( struct thread
*thread
)
409 int old_count
= thread
->suspend
;
410 if (thread
->suspend
> 0)
412 if (!(--thread
->suspend
+ thread
->process
->suspend
)) wake_thread( thread
);
417 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
418 int add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
422 list_add_tail( &obj
->wait_queue
, &entry
->entry
);
426 /* remove a thread from an object wait queue */
427 void remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
429 list_remove( &entry
->entry
);
430 release_object( obj
);
434 static void end_wait( struct thread
*thread
)
436 struct thread_wait
*wait
= thread
->wait
;
437 struct wait_queue_entry
*entry
;
441 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
442 entry
->obj
->ops
->remove_queue( entry
->obj
, entry
);
443 if (wait
->user
) remove_timeout_user( wait
->user
);
444 thread
->wait
= wait
->next
;
448 /* build the thread wait structure */
449 static int wait_on( int count
, struct object
*objects
[], int flags
, const abs_time_t
*timeout
)
451 struct thread_wait
*wait
;
452 struct wait_queue_entry
*entry
;
455 if (!(wait
= mem_alloc( sizeof(*wait
) + (count
-1) * sizeof(*entry
) ))) return 0;
456 wait
->next
= current
->wait
;
457 wait
->thread
= current
;
461 current
->wait
= wait
;
462 if (flags
& SELECT_TIMEOUT
)
464 wait
->timeout
.tv_sec
= timeout
->sec
;
465 wait
->timeout
.tv_usec
= timeout
->usec
;
468 for (i
= 0, entry
= wait
->queues
; i
< count
; i
++, entry
++)
470 struct object
*obj
= objects
[i
];
471 entry
->thread
= current
;
472 if (!obj
->ops
->add_queue( obj
, entry
))
482 /* check if the thread waiting condition is satisfied */
483 static int check_wait( struct thread
*thread
)
486 struct thread_wait
*wait
= thread
->wait
;
487 struct wait_queue_entry
*entry
= wait
->queues
;
489 /* Suspended threads may not acquire locks, but they can run system APCs */
490 if (thread
->process
->suspend
+ thread
->suspend
> 0)
492 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && !list_empty( &thread
->system_apc
))
493 return STATUS_USER_APC
;
498 if (wait
->flags
& SELECT_ALL
)
501 /* Note: we must check them all anyway, as some objects may
502 * want to do something when signaled, even if others are not */
503 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
504 not_ok
|= !entry
->obj
->ops
->signaled( entry
->obj
, thread
);
505 if (not_ok
) goto other_checks
;
506 /* Wait satisfied: tell it to all objects */
508 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
509 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
510 signaled
= STATUS_ABANDONED_WAIT_0
;
515 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
517 if (!entry
->obj
->ops
->signaled( entry
->obj
, thread
)) continue;
518 /* Wait satisfied: tell it to the object */
520 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
521 signaled
= i
+ STATUS_ABANDONED_WAIT_0
;
527 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && !list_empty(&thread
->system_apc
)) return STATUS_USER_APC
;
528 if ((wait
->flags
& SELECT_ALERTABLE
) && !list_empty(&thread
->user_apc
)) return STATUS_USER_APC
;
529 if (wait
->flags
& SELECT_TIMEOUT
)
531 if (!time_before( ¤t_time
, &wait
->timeout
)) return STATUS_TIMEOUT
;
536 /* send the wakeup signal to a thread */
537 static int send_thread_wakeup( struct thread
*thread
, void *cookie
, int signaled
)
539 struct wake_up_reply reply
;
542 reply
.cookie
= cookie
;
543 reply
.signaled
= signaled
;
544 if ((ret
= write( get_unix_fd( thread
->wait_fd
), &reply
, sizeof(reply
) )) == sizeof(reply
))
547 fatal_protocol_error( thread
, "partial wakeup write %d\n", ret
);
548 else if (errno
== EPIPE
)
549 kill_thread( thread
, 0 ); /* normal death */
551 fatal_protocol_perror( thread
, "write" );
555 /* attempt to wake up a thread */
556 /* return >0 if OK, 0 if the wait condition is still not satisfied */
557 int wake_thread( struct thread
*thread
)
562 for (count
= 0; thread
->wait
; count
++)
564 if ((signaled
= check_wait( thread
)) == -1) break;
566 cookie
= thread
->wait
->cookie
;
567 if (debug_level
) fprintf( stderr
, "%04x: *wakeup* signaled=%d cookie=%p\n",
568 thread
->id
, signaled
, cookie
);
570 if (send_thread_wakeup( thread
, cookie
, signaled
) == -1) /* error */
576 /* thread wait timeout */
577 static void thread_timeout( void *ptr
)
579 struct thread_wait
*wait
= ptr
;
580 struct thread
*thread
= wait
->thread
;
581 void *cookie
= wait
->cookie
;
584 if (thread
->wait
!= wait
) return; /* not the top-level wait, ignore it */
585 if (thread
->suspend
+ thread
->process
->suspend
> 0) return; /* suspended, ignore it */
587 if (debug_level
) fprintf( stderr
, "%04x: *wakeup* signaled=%d cookie=%p\n",
588 thread
->id
, (int)STATUS_TIMEOUT
, cookie
);
590 if (send_thread_wakeup( thread
, cookie
, STATUS_TIMEOUT
) == -1) return;
591 /* check if other objects have become signaled in the meantime */
592 wake_thread( thread
);
595 /* try signaling an event flag, a semaphore or a mutex */
596 static int signal_object( obj_handle_t handle
)
601 obj
= get_handle_obj( current
->process
, handle
, 0, NULL
);
604 ret
= obj
->ops
->signal( obj
, get_handle_access( current
->process
, handle
));
605 release_object( obj
);
610 /* select on a list of handles */
611 static void select_on( int count
, void *cookie
, const obj_handle_t
*handles
,
612 int flags
, const abs_time_t
*timeout
, obj_handle_t signal_obj
)
615 struct object
*objects
[MAXIMUM_WAIT_OBJECTS
];
617 if ((count
< 0) || (count
> MAXIMUM_WAIT_OBJECTS
))
619 set_error( STATUS_INVALID_PARAMETER
);
622 for (i
= 0; i
< count
; i
++)
624 if (!(objects
[i
] = get_handle_obj( current
->process
, handles
[i
], SYNCHRONIZE
, NULL
)))
628 if (i
< count
) goto done
;
629 if (!wait_on( count
, objects
, flags
, timeout
)) goto done
;
631 /* signal the object */
634 if (!signal_object( signal_obj
))
639 /* check if we woke ourselves up */
640 if (!current
->wait
) goto done
;
643 if ((ret
= check_wait( current
)) != -1)
645 /* condition is already satisfied */
651 /* now we need to wait */
652 if (flags
& SELECT_TIMEOUT
)
654 if (!(current
->wait
->user
= add_timeout_user( ¤t
->wait
->timeout
,
655 thread_timeout
, current
->wait
)))
661 current
->wait
->cookie
= cookie
;
662 set_error( STATUS_PENDING
);
665 while (--i
>= 0) release_object( objects
[i
] );
668 /* attempt to wake threads sleeping on the object wait queue */
669 void wake_up( struct object
*obj
, int max
)
671 struct list
*ptr
, *next
;
673 LIST_FOR_EACH_SAFE( ptr
, next
, &obj
->wait_queue
)
675 struct wait_queue_entry
*entry
= LIST_ENTRY( ptr
, struct wait_queue_entry
, entry
);
676 if (wake_thread( entry
->thread
))
678 if (max
&& !--max
) break;
683 /* return the apc queue to use for a given apc type */
684 static inline struct list
*get_apc_queue( struct thread
*thread
, enum apc_type type
)
691 return &thread
->user_apc
;
693 return &thread
->system_apc
;
697 /* queue an existing APC to a given thread */
698 static int queue_apc( struct process
*process
, struct thread
*thread
, struct thread_apc
*apc
)
702 if (!thread
) /* find a suitable thread inside the process */
704 struct thread
*candidate
;
706 /* first try to find a waiting thread */
707 LIST_FOR_EACH_ENTRY( candidate
, &process
->thread_list
, struct thread
, proc_entry
)
709 if (candidate
->state
== TERMINATED
) continue;
710 if (process
->suspend
|| candidate
->suspend
||
711 (candidate
->wait
&& (candidate
->wait
->flags
& SELECT_INTERRUPTIBLE
)))
719 /* then use the first one that accepts a signal */
720 LIST_FOR_EACH_ENTRY( candidate
, &process
->thread_list
, struct thread
, proc_entry
)
722 if (send_thread_signal( candidate
, SIGUSR1
))
729 if (!thread
) return 0; /* nothing found */
733 if (thread
->state
== TERMINATED
) return 0;
734 /* cancel a possible previous APC with the same owner */
735 if (apc
->owner
) thread_cancel_apc( thread
, apc
->owner
, apc
->call
.type
);
738 queue
= get_apc_queue( thread
, apc
->call
.type
);
740 list_add_tail( queue
, &apc
->entry
);
741 if (!list_prev( queue
, &apc
->entry
)) /* first one */
742 wake_thread( thread
);
747 /* queue an async procedure call */
748 int thread_queue_apc( struct thread
*thread
, struct object
*owner
, const apc_call_t
*call_data
)
750 struct thread_apc
*apc
;
753 if ((apc
= create_apc( owner
, call_data
)))
755 ret
= queue_apc( NULL
, thread
, apc
);
756 release_object( apc
);
761 /* cancel the async procedure call owned by a specific object */
762 void thread_cancel_apc( struct thread
*thread
, struct object
*owner
, enum apc_type type
)
764 struct thread_apc
*apc
;
765 struct list
*queue
= get_apc_queue( thread
, type
);
767 LIST_FOR_EACH_ENTRY( apc
, queue
, struct thread_apc
, entry
)
769 if (apc
->owner
!= owner
) continue;
770 list_remove( &apc
->entry
);
772 wake_up( &apc
->obj
, 0 );
773 release_object( apc
);
778 /* remove the head apc from the queue; the returned object must be released by the caller */
779 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
)
781 struct thread_apc
*apc
= NULL
;
782 struct list
*ptr
= list_head( &thread
->system_apc
);
784 if (!ptr
&& !system_only
) ptr
= list_head( &thread
->user_apc
);
787 apc
= LIST_ENTRY( ptr
, struct thread_apc
, entry
);
793 /* clear an APC queue, cancelling all the APCs on it */
794 static void clear_apc_queue( struct list
*queue
)
798 while ((ptr
= list_head( queue
)))
800 struct thread_apc
*apc
= LIST_ENTRY( ptr
, struct thread_apc
, entry
);
801 list_remove( &apc
->entry
);
803 wake_up( &apc
->obj
, 0 );
804 release_object( apc
);
808 /* add an fd to the inflight list */
809 /* return list index, or -1 on error */
810 int thread_add_inflight_fd( struct thread
*thread
, int client
, int server
)
814 if (server
== -1) return -1;
821 /* first check if we already have an entry for this fd */
822 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
823 if (thread
->inflight
[i
].client
== client
)
825 close( thread
->inflight
[i
].server
);
826 thread
->inflight
[i
].server
= server
;
830 /* now find a free spot to store it */
831 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
832 if (thread
->inflight
[i
].client
== -1)
834 thread
->inflight
[i
].client
= client
;
835 thread
->inflight
[i
].server
= server
;
841 /* get an inflight fd and purge it from the list */
842 /* the fd must be closed when no longer used */
843 int thread_get_inflight_fd( struct thread
*thread
, int client
)
847 if (client
== -1) return -1;
851 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
853 if (thread
->inflight
[i
].client
== client
)
855 ret
= thread
->inflight
[i
].server
;
856 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
860 } while (!receive_fd( thread
->process
)); /* in case it is still in the socket buffer */
864 /* kill a thread on the spot */
865 void kill_thread( struct thread
*thread
, int violent_death
)
867 if (thread
->state
== TERMINATED
) return; /* already killed */
868 thread
->state
= TERMINATED
;
869 thread
->exit_time
= current_time
;
870 if (current
== thread
) current
= NULL
;
872 fprintf( stderr
,"%04x: *killed* exit_code=%d\n",
873 thread
->id
, thread
->exit_code
);
876 while (thread
->wait
) end_wait( thread
);
877 send_thread_wakeup( thread
, NULL
, STATUS_PENDING
);
878 /* if it is waiting on the socket, we don't need to send a SIGTERM */
881 kill_console_processes( thread
, 0 );
882 debug_exit_thread( thread
);
883 abandon_mutexes( thread
);
884 wake_up( &thread
->obj
, 0 );
885 if (violent_death
) send_thread_signal( thread
, SIGTERM
);
886 cleanup_thread( thread
);
887 remove_process_thread( thread
->process
, thread
);
888 release_object( thread
);
891 /* trigger a breakpoint event in a given thread */
892 void break_thread( struct thread
*thread
)
894 struct debug_event_exception data
;
896 assert( thread
->context
);
898 data
.record
.ExceptionCode
= STATUS_BREAKPOINT
;
899 data
.record
.ExceptionFlags
= EXCEPTION_CONTINUABLE
;
900 data
.record
.ExceptionRecord
= NULL
;
901 data
.record
.ExceptionAddress
= get_context_ip( thread
->context
);
902 data
.record
.NumberParameters
= 0;
904 generate_debug_event( thread
, EXCEPTION_DEBUG_EVENT
, &data
);
905 thread
->debug_break
= 0;
908 /* take a snapshot of currently running threads */
909 struct thread_snapshot
*thread_snap( int *count
)
911 struct thread_snapshot
*snapshot
, *ptr
;
912 struct thread
*thread
;
915 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
916 if (thread
->state
!= TERMINATED
) total
++;
917 if (!total
|| !(snapshot
= mem_alloc( sizeof(*snapshot
) * total
))) return NULL
;
919 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
921 if (thread
->state
== TERMINATED
) continue;
922 ptr
->thread
= thread
;
923 ptr
->count
= thread
->obj
.refcount
;
924 ptr
->priority
= thread
->priority
;
925 grab_object( thread
);
932 /* gets the current impersonation token */
933 struct token
*thread_get_impersonation_token( struct thread
*thread
)
936 return thread
->token
;
938 return thread
->process
->token
;
941 /* create a new thread */
942 DECL_HANDLER(new_thread
)
944 struct thread
*thread
;
945 int request_fd
= thread_get_inflight_fd( current
, req
->request_fd
);
947 if (request_fd
== -1 || fcntl( request_fd
, F_SETFL
, O_NONBLOCK
) == -1)
949 if (request_fd
!= -1) close( request_fd
);
950 set_error( STATUS_INVALID_HANDLE
);
954 if ((thread
= create_thread( request_fd
, current
->process
)))
956 if (req
->suspend
) thread
->suspend
++;
957 reply
->tid
= get_thread_id( thread
);
958 if ((reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->attributes
)))
960 /* thread object will be released when the thread gets killed */
963 kill_thread( thread
, 1 );
967 /* initialize a new thread */
968 DECL_HANDLER(init_thread
)
970 struct process
*process
= current
->process
;
971 int reply_fd
= thread_get_inflight_fd( current
, req
->reply_fd
);
972 int wait_fd
= thread_get_inflight_fd( current
, req
->wait_fd
);
974 if (current
->reply_fd
) /* already initialised */
976 set_error( STATUS_INVALID_PARAMETER
);
980 if (reply_fd
== -1 || fcntl( reply_fd
, F_SETFL
, O_NONBLOCK
) == -1) goto error
;
982 current
->reply_fd
= create_anonymous_fd( &thread_fd_ops
, reply_fd
, ¤t
->obj
);
984 if (!current
->reply_fd
) goto error
;
988 set_error( STATUS_TOO_MANY_OPENED_FILES
); /* most likely reason */
991 if (!(current
->wait_fd
= create_anonymous_fd( &thread_fd_ops
, wait_fd
, ¤t
->obj
)))
994 if (!is_valid_address(req
->teb
) || !is_valid_address(req
->peb
) || !is_valid_address(req
->ldt_copy
))
996 set_error( STATUS_INVALID_PARAMETER
);
1000 current
->unix_pid
= req
->unix_pid
;
1001 current
->unix_tid
= req
->unix_tid
;
1002 current
->teb
= req
->teb
;
1004 if (!process
->peb
) /* first thread, initialize the process too */
1006 process
->unix_pid
= current
->unix_pid
;
1007 process
->peb
= req
->peb
;
1008 process
->ldt_copy
= req
->ldt_copy
;
1009 reply
->info_size
= init_process( current
);
1013 if (process
->unix_pid
!= current
->unix_pid
)
1014 process
->unix_pid
= -1; /* can happen with linuxthreads */
1015 if (current
->suspend
+ process
->suspend
> 0) stop_thread( current
);
1016 generate_debug_event( current
, CREATE_THREAD_DEBUG_EVENT
, req
->entry
);
1018 debug_level
= max( debug_level
, req
->debug_level
);
1020 reply
->pid
= get_process_id( process
);
1021 reply
->tid
= get_thread_id( current
);
1022 reply
->version
= SERVER_PROTOCOL_VERSION
;
1023 reply
->server_start
.sec
= server_start_time
.tv_sec
;
1024 reply
->server_start
.usec
= server_start_time
.tv_usec
;
1028 if (reply_fd
!= -1) close( reply_fd
);
1029 if (wait_fd
!= -1) close( wait_fd
);
1032 /* terminate a thread */
1033 DECL_HANDLER(terminate_thread
)
1035 struct thread
*thread
;
1039 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_TERMINATE
)))
1041 thread
->exit_code
= req
->exit_code
;
1042 if (thread
!= current
) kill_thread( thread
, 1 );
1046 reply
->last
= (thread
->process
->running_threads
== 1);
1048 release_object( thread
);
1052 /* open a handle to a thread */
1053 DECL_HANDLER(open_thread
)
1055 struct thread
*thread
= get_thread_from_id( req
->tid
);
1060 reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->attributes
);
1061 release_object( thread
);
1065 /* fetch information about a thread */
1066 DECL_HANDLER(get_thread_info
)
1068 struct thread
*thread
;
1069 obj_handle_t handle
= req
->handle
;
1071 if (!handle
) thread
= get_thread_from_id( req
->tid_in
);
1072 else thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
);
1076 reply
->pid
= get_process_id( thread
->process
);
1077 reply
->tid
= get_thread_id( thread
);
1078 reply
->teb
= thread
->teb
;
1079 reply
->exit_code
= (thread
->state
== TERMINATED
) ? thread
->exit_code
: STATUS_PENDING
;
1080 reply
->priority
= thread
->priority
;
1081 reply
->affinity
= thread
->affinity
;
1082 reply
->creation_time
.sec
= thread
->creation_time
.tv_sec
;
1083 reply
->creation_time
.usec
= thread
->creation_time
.tv_usec
;
1084 reply
->exit_time
.sec
= thread
->exit_time
.tv_sec
;
1085 reply
->exit_time
.usec
= thread
->exit_time
.tv_usec
;
1086 reply
->last
= thread
->process
->running_threads
== 1;
1088 release_object( thread
);
1092 /* set information about a thread */
1093 DECL_HANDLER(set_thread_info
)
1095 struct thread
*thread
;
1097 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_INFORMATION
)))
1099 set_thread_info( thread
, req
);
1100 release_object( thread
);
1104 /* suspend a thread */
1105 DECL_HANDLER(suspend_thread
)
1107 struct thread
*thread
;
1109 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
1111 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
1112 else reply
->count
= suspend_thread( thread
);
1113 release_object( thread
);
1117 /* resume a thread */
1118 DECL_HANDLER(resume_thread
)
1120 struct thread
*thread
;
1122 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
1124 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
1125 else reply
->count
= resume_thread( thread
);
1126 release_object( thread
);
1130 /* select on a handle list */
1131 DECL_HANDLER(select
)
1133 int count
= get_req_data_size() / sizeof(obj_handle_t
);
1134 select_on( count
, req
->cookie
, get_req_data(), req
->flags
, &req
->timeout
, req
->signal
);
1137 /* queue an APC for a thread or process */
1138 DECL_HANDLER(queue_apc
)
1140 struct thread
*thread
;
1141 struct process
*process
;
1142 struct thread_apc
*apc
;
1143 unsigned int access
;
1145 if (!(apc
= create_apc( NULL
, &req
->call
))) return;
1147 switch (apc
->call
.type
)
1151 if ((thread
= get_thread_from_handle( req
->thread
, THREAD_SET_CONTEXT
)))
1153 if (!queue_apc( NULL
, thread
, apc
)) set_error( STATUS_THREAD_IS_TERMINATING
);
1154 release_object( thread
);
1157 case APC_VIRTUAL_ALLOC
:
1158 case APC_VIRTUAL_FREE
:
1159 case APC_VIRTUAL_QUERY
:
1160 case APC_VIRTUAL_PROTECT
:
1161 case APC_VIRTUAL_FLUSH
:
1162 access
= (apc
->call
.type
== APC_VIRTUAL_QUERY
) ? PROCESS_QUERY_INFORMATION
: PROCESS_VM_OPERATION
;
1163 if ((process
= get_process_from_handle( req
->process
, access
)))
1165 obj_handle_t handle
= alloc_handle( current
->process
, apc
, SYNCHRONIZE
, 0 );
1168 if (queue_apc( process
, NULL
, apc
)) reply
->handle
= handle
;
1171 close_handle( current
->process
, handle
);
1172 set_error( STATUS_PROCESS_IS_TERMINATING
);
1175 release_object( process
);
1179 set_error( STATUS_INVALID_PARAMETER
);
1182 release_object( apc
);
1185 /* get next APC to call */
1186 DECL_HANDLER(get_apc
)
1188 struct thread_apc
*apc
;
1189 int system_only
= !req
->alertable
;
1193 if (!(apc
= (struct thread_apc
*)get_handle_obj( current
->process
, req
->prev
,
1194 0, &thread_apc_ops
))) return;
1195 apc
->result
= req
->result
;
1197 wake_up( &apc
->obj
, 0 );
1198 close_handle( current
->process
, req
->prev
);
1199 release_object( apc
);
1202 if (current
->suspend
+ current
->process
->suspend
> 0) system_only
= 1;
1206 if (!(apc
= thread_dequeue_apc( current
, system_only
)))
1209 set_error( STATUS_PENDING
);
1212 /* Optimization: ignore APC_NONE calls, they are only used to
1213 * wake up a thread, but since we got here the thread woke up already.
1215 if (apc
->call
.type
!= APC_NONE
) break;
1217 wake_up( &apc
->obj
, 0 );
1218 release_object( apc
);
1221 if ((reply
->handle
= alloc_handle( current
->process
, apc
, SYNCHRONIZE
, 0 )))
1222 reply
->call
= apc
->call
;
1223 release_object( apc
);
1226 /* Get the result of an APC call */
1227 DECL_HANDLER(get_apc_result
)
1229 struct thread_apc
*apc
;
1231 if (!(apc
= (struct thread_apc
*)get_handle_obj( current
->process
, req
->handle
,
1232 0, &thread_apc_ops
))) return;
1233 if (!apc
->executed
) set_error( STATUS_PENDING
);
1236 reply
->result
= apc
->result
;
1237 /* close the handle directly to avoid an extra round-trip */
1238 close_handle( current
->process
, req
->handle
);
1240 release_object( apc
);
1243 /* retrieve the current context of a thread */
1244 DECL_HANDLER(get_thread_context
)
1246 struct thread
*thread
;
1249 if (get_reply_max_size() < sizeof(CONTEXT
))
1251 set_error( STATUS_INVALID_PARAMETER
);
1254 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_GET_CONTEXT
))) return;
1258 if (thread
!= current
|| !thread
->suspend_context
)
1260 /* not suspended, shouldn't happen */
1261 set_error( STATUS_INVALID_PARAMETER
);
1265 if (thread
->context
== thread
->suspend_context
) thread
->context
= NULL
;
1266 set_reply_data_ptr( thread
->suspend_context
, sizeof(CONTEXT
) );
1267 thread
->suspend_context
= NULL
;
1270 else if (thread
!= current
&& !thread
->context
)
1272 /* thread is not suspended, retry (if it's still running) */
1273 if (thread
->state
!= RUNNING
) set_error( STATUS_ACCESS_DENIED
);
1274 else set_error( STATUS_PENDING
);
1276 else if ((context
= set_reply_data_size( sizeof(CONTEXT
) )))
1278 unsigned int flags
= get_context_system_regs( req
->flags
);
1280 memset( context
, 0, sizeof(CONTEXT
) );
1281 context
->ContextFlags
= get_context_cpu_flag();
1282 if (thread
->context
) copy_context( context
, thread
->context
, req
->flags
& ~flags
);
1283 if (flags
) get_thread_context( thread
, context
, flags
);
1285 reply
->self
= (thread
== current
);
1286 release_object( thread
);
1289 /* set the current context of a thread */
1290 DECL_HANDLER(set_thread_context
)
1292 struct thread
*thread
;
1294 if (get_req_data_size() < sizeof(CONTEXT
))
1296 set_error( STATUS_INVALID_PARAMETER
);
1299 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
))) return;
1303 if (thread
!= current
|| thread
->context
)
1305 /* nested suspend or exception, shouldn't happen */
1306 set_error( STATUS_INVALID_PARAMETER
);
1308 else if ((thread
->suspend_context
= mem_alloc( sizeof(CONTEXT
) )))
1310 memcpy( thread
->suspend_context
, get_req_data(), sizeof(CONTEXT
) );
1311 thread
->context
= thread
->suspend_context
;
1312 if (thread
->debug_break
) break_thread( thread
);
1315 else if (thread
!= current
&& !thread
->context
)
1317 /* thread is not suspended, retry (if it's still running) */
1318 if (thread
->state
!= RUNNING
) set_error( STATUS_ACCESS_DENIED
);
1319 else set_error( STATUS_PENDING
);
1323 const CONTEXT
*context
= get_req_data();
1324 unsigned int flags
= get_context_system_regs( req
->flags
);
1326 if (flags
) set_thread_context( thread
, context
, flags
);
1327 if (thread
->context
&& !get_error())
1328 copy_context( thread
->context
, context
, req
->flags
& ~flags
);
1330 reply
->self
= (thread
== current
);
1331 release_object( thread
);
1334 /* fetch a selector entry for a thread */
1335 DECL_HANDLER(get_selector_entry
)
1337 struct thread
*thread
;
1338 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
1340 get_selector_entry( thread
, req
->entry
, &reply
->base
, &reply
->limit
, &reply
->flags
);
1341 release_object( thread
);