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 */
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 default_get_sd, /* get_sd */
97 default_set_sd, /* set_sd */
98 no_lookup_name, /* lookup_name */
99 no_open_file, /* open_file */
100 no_close_handle, /* close_handle */
101 thread_apc_destroy /* destroy */
105 /* thread operations */
107 static void dump_thread( struct object *obj, int verbose );
108 static int thread_signaled( struct object *obj, struct thread *thread );
109 static unsigned int thread_map_access( struct object *obj, unsigned int access );
110 static void thread_poll_event( struct fd *fd, int event );
111 static void destroy_thread( struct object *obj );
113 static const struct object_ops thread_ops =
115 sizeof(struct thread), /* size */
116 dump_thread, /* dump */
117 add_queue, /* add_queue */
118 remove_queue, /* remove_queue */
119 thread_signaled, /* signaled */
120 no_satisfied, /* satisfied */
121 no_signal, /* signal */
122 no_get_fd, /* get_fd */
123 thread_map_access, /* map_access */
124 default_get_sd, /* get_sd */
125 default_set_sd, /* set_sd */
126 no_lookup_name, /* lookup_name */
127 no_open_file, /* open_file */
128 no_close_handle, /* close_handle */
129 destroy_thread /* destroy */
132 static const struct fd_ops thread_fd_ops =
134 NULL, /* get_poll_events */
135 thread_poll_event, /* poll_event */
137 NULL, /* get_fd_type */
139 NULL, /* queue_async */
140 NULL, /* reselect_async */
141 NULL /* cancel_async */
144 static struct list thread_list = LIST_INIT(thread_list);
146 /* initialize the structure for a newly allocated thread */
147 static inline void init_thread_structure( struct thread *thread )
151 thread->unix_pid = -1; /* not known yet */
152 thread->unix_tid = -1; /* not known yet */
153 thread->context = NULL;
154 thread->suspend_context = NULL;
156 thread->debug_ctx = NULL;
157 thread->debug_event = NULL;
158 thread->debug_break = 0;
159 thread->queue = NULL;
162 thread->req_data = NULL;
163 thread->req_toread = 0;
164 thread->reply_data = NULL;
165 thread->reply_towrite = 0;
166 thread->request_fd = NULL;
167 thread->reply_fd = NULL;
168 thread->wait_fd = NULL;
169 thread->state = RUNNING;
170 thread->exit_code = 0;
171 thread->priority = 0;
172 thread->affinity = 1;
174 thread->desktop_users = 0;
175 thread->token = NULL;
177 thread->creation_time = current_time;
178 thread->exit_time = 0;
180 list_init( &thread->mutex_list );
181 list_init( &thread->system_apc );
182 list_init( &thread->user_apc );
184 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
185 thread->inflight[i].server = thread->inflight[i].client = -1;
188 /* check if address looks valid for a client-side data structure (TEB etc.) */
189 static inline int is_valid_address( void *addr )
191 return addr && !((unsigned long)addr % sizeof(int));
194 /* create a new thread */
195 struct thread *create_thread( int fd, struct process *process )
197 struct thread *thread;
199 if (!(thread = alloc_object( &thread_ops ))) return NULL;
201 init_thread_structure( thread );
203 thread->process = (struct process *)grab_object( process );
204 thread->desktop = process->desktop;
205 if (!current) current = thread;
207 list_add_head( &thread_list, &thread->entry );
209 if (!(thread->id = alloc_ptid( thread )))
211 release_object( thread );
214 if (!(thread->request_fd = create_anonymous_fd( &thread_fd_ops, fd, &thread->obj, 0 )))
216 release_object( thread );
220 set_fd_events( thread->request_fd, POLLIN ); /* start listening to events */
221 add_process_thread( thread->process, thread );
225 /* handle a client event */
226 static void thread_poll_event( struct fd *fd, int event )
228 struct thread *thread = get_fd_user( fd );
229 assert( thread->obj.ops == &thread_ops );
231 if (event & (POLLERR | POLLHUP)) kill_thread( thread, 0 );
232 else if (event & POLLIN) read_request( thread );
233 else if (event & POLLOUT) write_reply( thread );
236 /* cleanup everything that is no longer needed by a dead thread */
237 /* used by destroy_thread and kill_thread */
238 static void cleanup_thread( struct thread *thread )
242 clear_apc_queue( &thread->system_apc );
243 clear_apc_queue( &thread->user_apc );
244 free( thread->req_data );
245 free( thread->reply_data );
246 if (thread->request_fd) release_object( thread->request_fd );
247 if (thread->reply_fd) release_object( thread->reply_fd );
248 if (thread->wait_fd) release_object( thread->wait_fd );
249 free( thread->suspend_context );
250 free_msg_queue( thread );
251 cleanup_clipboard_thread(thread);
252 destroy_thread_windows( thread );
253 close_thread_desktop( thread );
254 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
256 if (thread->inflight[i].client != -1)
258 close( thread->inflight[i].server );
259 thread->inflight[i].client = thread->inflight[i].server = -1;
262 thread->req_data = NULL;
263 thread->reply_data = NULL;
264 thread->request_fd = NULL;
265 thread->reply_fd = NULL;
266 thread->wait_fd = NULL;
267 thread->context = NULL;
268 thread->suspend_context = NULL;
272 /* destroy a thread when its refcount is 0 */
273 static void destroy_thread( struct object *obj )
275 struct thread *thread = (struct thread *)obj;
276 assert( obj->ops == &thread_ops );
278 assert( !thread->debug_ctx ); /* cannot still be debugging something */
279 list_remove( &thread->entry );
280 cleanup_thread( thread );
281 release_object( thread->process );
282 if (thread->id) free_ptid( thread->id );
283 if (thread->token) release_object( thread->token );
286 /* dump a thread on stdout for debugging purposes */
287 static void dump_thread( struct object *obj, int verbose )
289 struct thread *thread = (struct thread *)obj;
290 assert( obj->ops == &thread_ops );
292 fprintf( stderr, "Thread id=%04x unix pid=%d unix tid=%d teb=%p state=%d\n",
293 thread->id, thread->unix_pid, thread->unix_tid, thread->teb, thread->state );
296 static int thread_signaled( struct object *obj, struct thread *thread )
298 struct thread *mythread = (struct thread *)obj;
299 return (mythread->state == TERMINATED);
302 static unsigned int thread_map_access( struct object *obj, unsigned int access )
304 if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SYNCHRONIZE;
305 if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | SYNCHRONIZE;
306 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
307 if (access & GENERIC_ALL) access |= THREAD_ALL_ACCESS;
308 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
311 static void dump_thread_apc( struct object *obj, int verbose )
313 struct thread_apc *apc = (struct thread_apc *)obj;
314 assert( obj->ops == &thread_apc_ops );
316 fprintf( stderr, "APC owner=%p type=%u\n", apc->owner, apc->call.type );
319 static int thread_apc_signaled( struct object *obj, struct thread *thread )
321 struct thread_apc *apc = (struct thread_apc *)obj;
322 return apc->executed;
325 static void thread_apc_destroy( struct object *obj )
327 struct thread_apc *apc = (struct thread_apc *)obj;
328 if (apc->caller) release_object( apc->caller );
329 if (apc->owner) release_object( apc->owner );
332 /* queue an async procedure call */
333 static struct thread_apc *create_apc( struct object *owner, const apc_call_t *call_data )
335 struct thread_apc *apc;
337 if ((apc = alloc_object( &thread_apc_ops )))
339 apc->call = *call_data;
343 apc->result.type = APC_NONE;
344 if (owner) grab_object( owner );
349 /* get a thread pointer from a thread id (and increment the refcount) */
350 struct thread *get_thread_from_id( thread_id_t id )
352 struct object *obj = get_ptid_entry( id );
354 if (obj && obj->ops == &thread_ops) return (struct thread *)grab_object( obj );
355 set_error( STATUS_INVALID_CID );
359 /* get a thread from a handle (and increment the refcount) */
360 struct thread *get_thread_from_handle( obj_handle_t handle, unsigned int access )
362 return (struct thread *)get_handle_obj( current->process, handle,
363 access, &thread_ops );
366 /* find a thread from a Unix tid */
367 struct thread *get_thread_from_tid( int tid )
369 struct thread *thread;
371 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
373 if (thread->unix_tid == tid) return thread;
378 /* find a thread from a Unix pid */
379 struct thread *get_thread_from_pid( int pid )
381 struct thread *thread;
383 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
385 if (thread->unix_pid == pid) return thread;
390 #define THREAD_PRIORITY_REALTIME_HIGHEST 6
391 #define THREAD_PRIORITY_REALTIME_LOWEST -7
393 /* set all information about a thread */
394 static void set_thread_info( struct thread *thread,
395 const struct set_thread_info_request *req )
397 if (req->mask & SET_THREAD_INFO_PRIORITY)
399 int max = THREAD_PRIORITY_HIGHEST;
400 int min = THREAD_PRIORITY_LOWEST;
401 if (thread->process->priority == PROCESS_PRIOCLASS_REALTIME)
403 max = THREAD_PRIORITY_REALTIME_HIGHEST;
404 min = THREAD_PRIORITY_REALTIME_LOWEST;
406 if ((req->priority >= min && req->priority <= max) ||
407 req->priority == THREAD_PRIORITY_IDLE ||
408 req->priority == THREAD_PRIORITY_TIME_CRITICAL)
409 thread->priority = req->priority;
411 set_error( STATUS_INVALID_PARAMETER );
413 if (req->mask & SET_THREAD_INFO_AFFINITY)
415 if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
416 else thread->affinity = req->affinity;
418 if (req->mask & SET_THREAD_INFO_TOKEN)
419 security_set_thread_token( thread, req->token );
422 /* stop a thread (at the Unix level) */
423 void stop_thread( struct thread *thread )
425 if (thread->context) return; /* already inside a debug event, no need for a signal */
426 /* can't stop a thread while initialisation is in progress */
427 if (is_process_init_done(thread->process)) send_thread_signal( thread, SIGUSR1 );
430 /* suspend a thread */
431 static int suspend_thread( struct thread *thread )
433 int old_count = thread->suspend;
434 if (thread->suspend < MAXIMUM_SUSPEND_COUNT)
436 if (!(thread->process->suspend + thread->suspend++)) stop_thread( thread );
438 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED );
442 /* resume a thread */
443 static int resume_thread( struct thread *thread )
445 int old_count = thread->suspend;
446 if (thread->suspend > 0)
448 if (!(--thread->suspend + thread->process->suspend)) wake_thread( thread );
453 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
454 int add_queue( struct object *obj, struct wait_queue_entry *entry )
458 list_add_tail( &obj->wait_queue, &entry->entry );
462 /* remove a thread from an object wait queue */
463 void remove_queue( struct object *obj, struct wait_queue_entry *entry )
465 list_remove( &entry->entry );
466 release_object( obj );
470 static void end_wait( struct thread *thread )
472 struct thread_wait *wait = thread->wait;
473 struct wait_queue_entry *entry;
477 thread->wait = wait->next;
478 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
479 entry->obj->ops->remove_queue( entry->obj, entry );
480 if (wait->user) remove_timeout_user( wait->user );
484 /* build the thread wait structure */
485 static int wait_on( unsigned int count, struct object *objects[], int flags, timeout_t timeout )
487 struct thread_wait *wait;
488 struct wait_queue_entry *entry;
491 if (!(wait = mem_alloc( FIELD_OFFSET(struct thread_wait, queues[count]) ))) return 0;
492 wait->next = current->wait;
493 wait->thread = current;
497 wait->timeout = timeout;
498 current->wait = wait;
500 for (i = 0, entry = wait->queues; i < count; i++, entry++)
502 struct object *obj = objects[i];
503 entry->thread = current;
504 if (!obj->ops->add_queue( obj, entry ))
514 /* check if the thread waiting condition is satisfied */
515 static int check_wait( struct thread *thread )
518 struct thread_wait *wait = thread->wait;
519 struct wait_queue_entry *entry = wait->queues;
523 if ((wait->flags & SELECT_INTERRUPTIBLE) && !list_empty( &thread->system_apc ))
524 return STATUS_USER_APC;
526 /* Suspended threads may not acquire locks, but they can run system APCs */
527 if (thread->process->suspend + thread->suspend > 0) return -1;
529 if (wait->flags & SELECT_ALL)
532 /* Note: we must check them all anyway, as some objects may
533 * want to do something when signaled, even if others are not */
534 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
535 not_ok |= !entry->obj->ops->signaled( entry->obj, thread );
536 if (not_ok) goto other_checks;
537 /* Wait satisfied: tell it to all objects */
539 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
540 if (entry->obj->ops->satisfied( entry->obj, thread ))
541 signaled = STATUS_ABANDONED_WAIT_0;
546 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
548 if (!entry->obj->ops->signaled( entry->obj, thread )) continue;
549 /* Wait satisfied: tell it to the object */
551 if (entry->obj->ops->satisfied( entry->obj, thread ))
552 signaled = i + STATUS_ABANDONED_WAIT_0;
558 if ((wait->flags & SELECT_ALERTABLE) && !list_empty(&thread->user_apc)) return STATUS_USER_APC;
559 if (wait->timeout <= current_time) return STATUS_TIMEOUT;
563 /* send the wakeup signal to a thread */
564 static int send_thread_wakeup( struct thread *thread, void *cookie, int signaled )
566 struct wake_up_reply reply;
569 reply.cookie = cookie;
570 reply.signaled = signaled;
571 if ((ret = write( get_unix_fd( thread->wait_fd ), &reply, sizeof(reply) )) == sizeof(reply))
574 fatal_protocol_error( thread, "partial wakeup write %d\n", ret );
575 else if (errno == EPIPE)
576 kill_thread( thread, 0 ); /* normal death */
578 fatal_protocol_perror( thread, "write" );
582 /* attempt to wake up a thread */
583 /* return >0 if OK, 0 if the wait condition is still not satisfied */
584 int wake_thread( struct thread *thread )
589 for (count = 0; thread->wait; count++)
591 if ((signaled = check_wait( thread )) == -1) break;
593 cookie = thread->wait->cookie;
594 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
595 thread->id, signaled, cookie );
597 if (send_thread_wakeup( thread, cookie, signaled ) == -1) /* error */
603 /* thread wait timeout */
604 static void thread_timeout( void *ptr )
606 struct thread_wait *wait = ptr;
607 struct thread *thread = wait->thread;
608 void *cookie = wait->cookie;
611 if (thread->wait != wait) return; /* not the top-level wait, ignore it */
612 if (thread->suspend + thread->process->suspend > 0) return; /* suspended, ignore it */
614 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
615 thread->id, (int)STATUS_TIMEOUT, cookie );
617 if (send_thread_wakeup( thread, cookie, STATUS_TIMEOUT ) == -1) return;
618 /* check if other objects have become signaled in the meantime */
619 wake_thread( thread );
622 /* try signaling an event flag, a semaphore or a mutex */
623 static int signal_object( obj_handle_t handle )
628 obj = get_handle_obj( current->process, handle, 0, NULL );
631 ret = obj->ops->signal( obj, get_handle_access( current->process, handle ));
632 release_object( obj );
637 /* select on a list of handles */
638 static timeout_t select_on( unsigned int count, void *cookie, const obj_handle_t *handles,
639 int flags, timeout_t timeout, obj_handle_t signal_obj )
643 struct object *objects[MAXIMUM_WAIT_OBJECTS];
645 if (timeout <= 0) timeout = current_time - timeout;
647 if (count > MAXIMUM_WAIT_OBJECTS)
649 set_error( STATUS_INVALID_PARAMETER );
652 for (i = 0; i < count; i++)
654 if (!(objects[i] = get_handle_obj( current->process, handles[i], SYNCHRONIZE, NULL )))
658 if (i < count) goto done;
659 if (!wait_on( count, objects, flags, timeout )) goto done;
661 /* signal the object */
664 if (!signal_object( signal_obj ))
669 /* check if we woke ourselves up */
670 if (!current->wait) goto done;
673 if ((ret = check_wait( current )) != -1)
675 /* condition is already satisfied */
681 /* now we need to wait */
682 if (current->wait->timeout != TIMEOUT_INFINITE)
684 if (!(current->wait->user = add_timeout_user( current->wait->timeout,
685 thread_timeout, current->wait )))
691 current->wait->cookie = cookie;
692 set_error( STATUS_PENDING );
695 while (i > 0) release_object( objects[--i] );
699 /* attempt to wake threads sleeping on the object wait queue */
700 void wake_up( struct object *obj, int max )
702 struct list *ptr, *next;
704 LIST_FOR_EACH_SAFE( ptr, next, &obj->wait_queue )
706 struct wait_queue_entry *entry = LIST_ENTRY( ptr, struct wait_queue_entry, entry );
707 if (wake_thread( entry->thread ))
709 if (max && !--max) break;
714 /* return the apc queue to use for a given apc type */
715 static inline struct list *get_apc_queue( struct thread *thread, enum apc_type type )
722 return &thread->user_apc;
724 return &thread->system_apc;
728 /* check if thread is currently waiting for a (system) apc */
729 static inline int is_in_apc_wait( struct thread *thread )
731 return (thread->process->suspend || thread->suspend ||
732 (thread->wait && (thread->wait->flags & SELECT_INTERRUPTIBLE)));
735 /* queue an existing APC to a given thread */
736 static int queue_apc( struct process *process, struct thread *thread, struct thread_apc *apc )
740 if (!thread) /* find a suitable thread inside the process */
742 struct thread *candidate;
744 /* first try to find a waiting thread */
745 LIST_FOR_EACH_ENTRY( candidate, &process->thread_list, struct thread, proc_entry )
747 if (candidate->state == TERMINATED) continue;
748 if (is_in_apc_wait( candidate ))
756 /* then use the first one that accepts a signal */
757 LIST_FOR_EACH_ENTRY( candidate, &process->thread_list, struct thread, proc_entry )
759 if (send_thread_signal( candidate, SIGUSR1 ))
766 if (!thread) return 0; /* nothing found */
767 queue = get_apc_queue( thread, apc->call.type );
771 if (thread->state == TERMINATED) return 0;
772 queue = get_apc_queue( thread, apc->call.type );
773 /* send signal for system APCs if needed */
774 if (queue == &thread->system_apc && list_empty( queue ) && !is_in_apc_wait( thread ))
776 if (!send_thread_signal( thread, SIGUSR1 )) return 0;
778 /* cancel a possible previous APC with the same owner */
779 if (apc->owner) thread_cancel_apc( thread, apc->owner, apc->call.type );
783 list_add_tail( queue, &apc->entry );
784 if (!list_prev( queue, &apc->entry )) /* first one */
785 wake_thread( thread );
790 /* queue an async procedure call */
791 int thread_queue_apc( struct thread *thread, struct object *owner, const apc_call_t *call_data )
793 struct thread_apc *apc;
796 if ((apc = create_apc( owner, call_data )))
798 ret = queue_apc( NULL, thread, apc );
799 release_object( apc );
804 /* cancel the async procedure call owned by a specific object */
805 void thread_cancel_apc( struct thread *thread, struct object *owner, enum apc_type type )
807 struct thread_apc *apc;
808 struct list *queue = get_apc_queue( thread, type );
810 LIST_FOR_EACH_ENTRY( apc, queue, struct thread_apc, entry )
812 if (apc->owner != owner) continue;
813 list_remove( &apc->entry );
815 wake_up( &apc->obj, 0 );
816 release_object( apc );
821 /* remove the head apc from the queue; the returned object must be released by the caller */
822 static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only )
824 struct thread_apc *apc = NULL;
825 struct list *ptr = list_head( &thread->system_apc );
827 if (!ptr && !system_only) ptr = list_head( &thread->user_apc );
830 apc = LIST_ENTRY( ptr, struct thread_apc, entry );
836 /* clear an APC queue, cancelling all the APCs on it */
837 static void clear_apc_queue( struct list *queue )
841 while ((ptr = list_head( queue )))
843 struct thread_apc *apc = LIST_ENTRY( ptr, struct thread_apc, entry );
844 list_remove( &apc->entry );
846 wake_up( &apc->obj, 0 );
847 release_object( apc );
851 /* add an fd to the inflight list */
852 /* return list index, or -1 on error */
853 int thread_add_inflight_fd( struct thread *thread, int client, int server )
857 if (server == -1) return -1;
864 /* first check if we already have an entry for this fd */
865 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
866 if (thread->inflight[i].client == client)
868 close( thread->inflight[i].server );
869 thread->inflight[i].server = server;
873 /* now find a free spot to store it */
874 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
875 if (thread->inflight[i].client == -1)
877 thread->inflight[i].client = client;
878 thread->inflight[i].server = server;
884 /* get an inflight fd and purge it from the list */
885 /* the fd must be closed when no longer used */
886 int thread_get_inflight_fd( struct thread *thread, int client )
890 if (client == -1) return -1;
894 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
896 if (thread->inflight[i].client == client)
898 ret = thread->inflight[i].server;
899 thread->inflight[i].server = thread->inflight[i].client = -1;
903 } while (!receive_fd( thread->process )); /* in case it is still in the socket buffer */
907 /* kill a thread on the spot */
908 void kill_thread( struct thread *thread, int violent_death )
910 if (thread->state == TERMINATED) return; /* already killed */
911 thread->state = TERMINATED;
912 thread->exit_time = current_time;
913 if (current == thread) current = NULL;
915 fprintf( stderr,"%04x: *killed* exit_code=%d\n",
916 thread->id, thread->exit_code );
919 while (thread->wait) end_wait( thread );
920 send_thread_wakeup( thread, NULL, STATUS_PENDING );
921 /* if it is waiting on the socket, we don't need to send a SIGTERM */
924 kill_console_processes( thread, 0 );
925 debug_exit_thread( thread );
926 abandon_mutexes( thread );
927 wake_up( &thread->obj, 0 );
928 if (violent_death) send_thread_signal( thread, SIGTERM );
929 cleanup_thread( thread );
930 remove_process_thread( thread->process, thread );
931 release_object( thread );
934 /* trigger a breakpoint event in a given thread */
935 void break_thread( struct thread *thread )
937 struct debug_event_exception data;
939 assert( thread->context );
941 data.record.ExceptionCode = STATUS_BREAKPOINT;
942 data.record.ExceptionFlags = EXCEPTION_CONTINUABLE;
943 data.record.ExceptionRecord = NULL;
944 data.record.ExceptionAddress = get_context_ip( thread->context );
945 data.record.NumberParameters = 0;
947 generate_debug_event( thread, EXCEPTION_DEBUG_EVENT, &data );
948 thread->debug_break = 0;
951 /* take a snapshot of currently running threads */
952 struct thread_snapshot *thread_snap( int *count )
954 struct thread_snapshot *snapshot, *ptr;
955 struct thread *thread;
958 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
959 if (thread->state != TERMINATED) total++;
960 if (!total || !(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
962 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
964 if (thread->state == TERMINATED) continue;
965 ptr->thread = thread;
966 ptr->count = thread->obj.refcount;
967 ptr->priority = thread->priority;
968 grab_object( thread );
975 /* gets the current impersonation token */
976 struct token *thread_get_impersonation_token( struct thread *thread )
979 return thread->token;
981 return thread->process->token;
984 /* create a new thread */
985 DECL_HANDLER(new_thread)
987 struct thread *thread;
988 int request_fd = thread_get_inflight_fd( current, req->request_fd );
990 if (request_fd == -1 || fcntl( request_fd, F_SETFL, O_NONBLOCK ) == -1)
992 if (request_fd != -1) close( request_fd );
993 set_error( STATUS_INVALID_HANDLE );
997 if ((thread = create_thread( request_fd, current->process )))
999 if (req->suspend) thread->suspend++;
1000 reply->tid = get_thread_id( thread );
1001 if ((reply->handle = alloc_handle( current->process, thread, req->access, req->attributes )))
1003 /* thread object will be released when the thread gets killed */
1006 kill_thread( thread, 1 );
1010 /* initialize a new thread */
1011 DECL_HANDLER(init_thread)
1013 struct process *process = current->process;
1014 int reply_fd = thread_get_inflight_fd( current, req->reply_fd );
1015 int wait_fd = thread_get_inflight_fd( current, req->wait_fd );
1017 if (current->reply_fd) /* already initialised */
1019 set_error( STATUS_INVALID_PARAMETER );
1023 if (reply_fd == -1 || fcntl( reply_fd, F_SETFL, O_NONBLOCK ) == -1) goto error;
1025 current->reply_fd = create_anonymous_fd( &thread_fd_ops, reply_fd, ¤t->obj, 0 );
1027 if (!current->reply_fd) goto error;
1031 set_error( STATUS_TOO_MANY_OPENED_FILES ); /* most likely reason */
1034 if (!(current->wait_fd = create_anonymous_fd( &thread_fd_ops, wait_fd, ¤t->obj, 0 )))
1037 if (!is_valid_address(req->teb) || !is_valid_address(req->peb) || !is_valid_address(req->ldt_copy))
1039 set_error( STATUS_INVALID_PARAMETER );
1043 current->unix_pid = req->unix_pid;
1044 current->unix_tid = req->unix_tid;
1045 current->teb = req->teb;
1047 if (!process->peb) /* first thread, initialize the process too */
1049 process->unix_pid = current->unix_pid;
1050 process->peb = req->peb;
1051 process->ldt_copy = req->ldt_copy;
1052 reply->info_size = init_process( current );
1056 if (process->unix_pid != current->unix_pid)
1057 process->unix_pid = -1; /* can happen with linuxthreads */
1058 if (current->suspend + process->suspend > 0) stop_thread( current );
1059 generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, req->entry );
1061 debug_level = max( debug_level, req->debug_level );
1063 reply->pid = get_process_id( process );
1064 reply->tid = get_thread_id( current );
1065 reply->version = SERVER_PROTOCOL_VERSION;
1066 reply->server_start = server_start_time;
1070 if (reply_fd != -1) close( reply_fd );
1071 if (wait_fd != -1) close( wait_fd );
1074 /* terminate a thread */
1075 DECL_HANDLER(terminate_thread)
1077 struct thread *thread;
1081 if ((thread = get_thread_from_handle( req->handle, THREAD_TERMINATE )))
1083 thread->exit_code = req->exit_code;
1084 if (thread != current) kill_thread( thread, 1 );
1088 reply->last = (thread->process->running_threads == 1);
1090 release_object( thread );
1094 /* open a handle to a thread */
1095 DECL_HANDLER(open_thread)
1097 struct thread *thread = get_thread_from_id( req->tid );
1102 reply->handle = alloc_handle( current->process, thread, req->access, req->attributes );
1103 release_object( thread );
1107 /* fetch information about a thread */
1108 DECL_HANDLER(get_thread_info)
1110 struct thread *thread;
1111 obj_handle_t handle = req->handle;
1113 if (!handle) thread = get_thread_from_id( req->tid_in );
1114 else thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION );
1118 reply->pid = get_process_id( thread->process );
1119 reply->tid = get_thread_id( thread );
1120 reply->teb = thread->teb;
1121 reply->exit_code = (thread->state == TERMINATED) ? thread->exit_code : STATUS_PENDING;
1122 reply->priority = thread->priority;
1123 reply->affinity = thread->affinity;
1124 reply->creation_time = thread->creation_time;
1125 reply->exit_time = thread->exit_time;
1126 reply->last = thread->process->running_threads == 1;
1128 release_object( thread );
1132 /* set information about a thread */
1133 DECL_HANDLER(set_thread_info)
1135 struct thread *thread;
1137 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_INFORMATION )))
1139 set_thread_info( thread, req );
1140 release_object( thread );
1144 /* suspend a thread */
1145 DECL_HANDLER(suspend_thread)
1147 struct thread *thread;
1149 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
1151 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
1152 else reply->count = suspend_thread( thread );
1153 release_object( thread );
1157 /* resume a thread */
1158 DECL_HANDLER(resume_thread)
1160 struct thread *thread;
1162 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
1164 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
1165 else reply->count = resume_thread( thread );
1166 release_object( thread );
1170 /* select on a handle list */
1171 DECL_HANDLER(select)
1173 struct thread_apc *apc;
1175 const apc_result_t *result = get_req_data();
1176 const obj_handle_t *handles = (const obj_handle_t *)(result + 1);
1178 if (get_req_data_size() < sizeof(*result))
1180 set_error( STATUS_INVALID_PARAMETER );
1183 count = (get_req_data_size() - sizeof(*result)) / sizeof(obj_handle_t);
1185 /* first store results of previous apc */
1188 if (!(apc = (struct thread_apc *)get_handle_obj( current->process, req->prev_apc,
1189 0, &thread_apc_ops ))) return;
1190 apc->result = *result;
1192 if (apc->result.type == APC_CREATE_THREAD) /* transfer the handle to the caller process */
1194 obj_handle_t handle = duplicate_handle( current->process, apc->result.create_thread.handle,
1195 apc->caller->process, 0, 0, DUP_HANDLE_SAME_ACCESS );
1196 close_handle( current->process, apc->result.create_thread.handle );
1197 apc->result.create_thread.handle = handle;
1198 clear_error(); /* ignore errors from the above calls */
1200 else if (apc->result.type == APC_ASYNC_IO)
1202 if (apc->owner) async_set_result( apc->owner, apc->result.async_io.status, apc->result.async_io.total );
1204 wake_up( &apc->obj, 0 );
1205 close_handle( current->process, req->prev_apc );
1206 release_object( apc );
1209 reply->timeout = select_on( count, req->cookie, handles, req->flags, req->timeout, req->signal );
1211 if (get_error() == STATUS_USER_APC)
1215 if (!(apc = thread_dequeue_apc( current, !(req->flags & SELECT_ALERTABLE) )))
1217 /* Optimization: ignore APC_NONE calls, they are only used to
1218 * wake up a thread, but since we got here the thread woke up already.
1220 if (apc->call.type != APC_NONE)
1222 if ((reply->apc_handle = alloc_handle( current->process, apc, SYNCHRONIZE, 0 )))
1223 reply->call = apc->call;
1224 release_object( apc );
1228 wake_up( &apc->obj, 0 );
1229 release_object( apc );
1234 /* queue an APC for a thread or process */
1235 DECL_HANDLER(queue_apc)
1237 struct thread *thread = NULL;
1238 struct process *process = NULL;
1239 struct thread_apc *apc;
1241 if (!(apc = create_apc( NULL, &req->call ))) return;
1243 switch (apc->call.type)
1247 thread = get_thread_from_handle( req->thread, THREAD_SET_CONTEXT );
1249 case APC_VIRTUAL_ALLOC:
1250 case APC_VIRTUAL_FREE:
1251 case APC_VIRTUAL_PROTECT:
1252 case APC_VIRTUAL_FLUSH:
1253 case APC_VIRTUAL_LOCK:
1254 case APC_VIRTUAL_UNLOCK:
1255 case APC_UNMAP_VIEW:
1256 process = get_process_from_handle( req->process, PROCESS_VM_OPERATION );
1258 case APC_VIRTUAL_QUERY:
1259 process = get_process_from_handle( req->process, PROCESS_QUERY_INFORMATION );
1262 process = get_process_from_handle( req->process, PROCESS_VM_OPERATION );
1263 if (process && process != current->process)
1265 /* duplicate the handle into the target process */
1266 obj_handle_t handle = duplicate_handle( current->process, apc->call.map_view.handle,
1267 process, 0, 0, DUP_HANDLE_SAME_ACCESS );
1268 if (handle) apc->call.map_view.handle = handle;
1271 release_object( process );
1276 case APC_CREATE_THREAD:
1277 process = get_process_from_handle( req->process, PROCESS_CREATE_THREAD );
1280 set_error( STATUS_INVALID_PARAMETER );
1286 if (!queue_apc( NULL, thread, apc )) set_error( STATUS_THREAD_IS_TERMINATING );
1287 release_object( thread );
1291 reply->self = (process == current->process);
1294 obj_handle_t handle = alloc_handle( current->process, apc, SYNCHRONIZE, 0 );
1297 if (queue_apc( process, NULL, apc ))
1299 apc->caller = (struct thread *)grab_object( current );
1300 reply->handle = handle;
1304 close_handle( current->process, handle );
1305 set_error( STATUS_PROCESS_IS_TERMINATING );
1309 release_object( process );
1312 release_object( apc );
1315 /* Get the result of an APC call */
1316 DECL_HANDLER(get_apc_result)
1318 struct thread_apc *apc;
1320 if (!(apc = (struct thread_apc *)get_handle_obj( current->process, req->handle,
1321 0, &thread_apc_ops ))) return;
1322 if (!apc->executed) set_error( STATUS_PENDING );
1325 reply->result = apc->result;
1326 /* close the handle directly to avoid an extra round-trip */
1327 close_handle( current->process, req->handle );
1329 release_object( apc );
1332 /* retrieve the current context of a thread */
1333 DECL_HANDLER(get_thread_context)
1335 struct thread *thread;
1338 if (get_reply_max_size() < sizeof(CONTEXT))
1340 set_error( STATUS_INVALID_PARAMETER );
1343 if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
1347 if (thread != current || !thread->suspend_context)
1349 /* not suspended, shouldn't happen */
1350 set_error( STATUS_INVALID_PARAMETER );
1354 if (thread->context == thread->suspend_context) thread->context = NULL;
1355 set_reply_data_ptr( thread->suspend_context, sizeof(CONTEXT) );
1356 thread->suspend_context = NULL;
1359 else if (thread != current && !thread->context)
1361 /* thread is not suspended, retry (if it's still running) */
1362 if (thread->state != RUNNING) set_error( STATUS_ACCESS_DENIED );
1363 else set_error( STATUS_PENDING );
1365 else if ((context = set_reply_data_size( sizeof(CONTEXT) )))
1367 unsigned int flags = get_context_system_regs( req->flags );
1369 memset( context, 0, sizeof(CONTEXT) );
1370 context->ContextFlags = get_context_cpu_flag();
1371 if (thread->context) copy_context( context, thread->context, req->flags & ~flags );
1372 if (flags) get_thread_context( thread, context, flags );
1374 reply->self = (thread == current);
1375 release_object( thread );
1378 /* set the current context of a thread */
1379 DECL_HANDLER(set_thread_context)
1381 struct thread *thread;
1383 if (get_req_data_size() < sizeof(CONTEXT))
1385 set_error( STATUS_INVALID_PARAMETER );
1388 if (!(thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT ))) return;
1392 if (thread != current || thread->context)
1394 /* nested suspend or exception, shouldn't happen */
1395 set_error( STATUS_INVALID_PARAMETER );
1397 else if ((thread->suspend_context = mem_alloc( sizeof(CONTEXT) )))
1399 memcpy( thread->suspend_context, get_req_data(), sizeof(CONTEXT) );
1400 thread->context = thread->suspend_context;
1401 if (thread->debug_break) break_thread( thread );
1404 else if (thread != current && !thread->context)
1406 /* thread is not suspended, retry (if it's still running) */
1407 if (thread->state != RUNNING) set_error( STATUS_ACCESS_DENIED );
1408 else set_error( STATUS_PENDING );
1412 const CONTEXT *context = get_req_data();
1413 unsigned int flags = get_context_system_regs( req->flags );
1415 if (flags) set_thread_context( thread, context, flags );
1416 if (thread->context && !get_error())
1417 copy_context( thread->context, context, req->flags & ~flags );
1419 reply->self = (thread == current);
1420 release_object( thread );
1423 /* fetch a selector entry for a thread */
1424 DECL_HANDLER(get_selector_entry)
1426 struct thread *thread;
1427 if ((thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION )))
1429 get_selector_entry( thread, req->entry, &reply->base, &reply->limit, &reply->flags );
1430 release_object( thread );