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? */
78 static void dump_thread_apc( struct object *obj, int verbose );
79 static int thread_apc_signaled( struct object *obj, struct thread *thread );
80 static void clear_apc_queue( struct list *queue );
82 static const struct object_ops thread_apc_ops =
84 sizeof(struct thread_apc), /* size */
85 dump_thread_apc, /* dump */
86 add_queue, /* add_queue */
87 remove_queue, /* remove_queue */
88 thread_apc_signaled, /* signaled */
89 no_satisfied, /* satisfied */
90 no_signal, /* signal */
91 no_get_fd, /* get_fd */
92 no_map_access, /* map_access */
93 no_lookup_name, /* lookup_name */
94 no_close_handle, /* close_handle */
95 no_destroy /* destroy */
99 /* thread operations */
101 static void dump_thread( struct object *obj, int verbose );
102 static int thread_signaled( struct object *obj, struct thread *thread );
103 static unsigned int thread_map_access( struct object *obj, unsigned int access );
104 static void thread_poll_event( struct fd *fd, int event );
105 static void destroy_thread( struct object *obj );
107 static const struct object_ops thread_ops =
109 sizeof(struct thread), /* size */
110 dump_thread, /* dump */
111 add_queue, /* add_queue */
112 remove_queue, /* remove_queue */
113 thread_signaled, /* signaled */
114 no_satisfied, /* satisfied */
115 no_signal, /* signal */
116 no_get_fd, /* get_fd */
117 thread_map_access, /* map_access */
118 no_lookup_name, /* lookup_name */
119 no_close_handle, /* close_handle */
120 destroy_thread /* destroy */
123 static const struct fd_ops thread_fd_ops =
125 NULL, /* get_poll_events */
126 thread_poll_event, /* poll_event */
127 no_flush, /* flush */
128 no_get_file_info, /* get_file_info */
129 no_queue_async, /* queue_async */
130 no_cancel_async /* cancel_async */
133 static struct list thread_list = LIST_INIT(thread_list);
135 /* initialize the structure for a newly allocated thread */
136 inline static void init_thread_structure( struct thread *thread )
140 thread->unix_pid = -1; /* not known yet */
141 thread->unix_tid = -1; /* not known yet */
142 thread->context = NULL;
143 thread->suspend_context = NULL;
145 thread->debug_ctx = NULL;
146 thread->debug_event = NULL;
147 thread->debug_break = 0;
148 thread->queue = NULL;
151 thread->req_data = NULL;
152 thread->req_toread = 0;
153 thread->reply_data = NULL;
154 thread->reply_towrite = 0;
155 thread->request_fd = NULL;
156 thread->reply_fd = NULL;
157 thread->wait_fd = NULL;
158 thread->state = RUNNING;
159 thread->exit_code = 0;
160 thread->priority = 0;
161 thread->affinity = 1;
163 thread->desktop_users = 0;
164 thread->token = NULL;
166 thread->creation_time = current_time;
167 thread->exit_time.tv_sec = thread->exit_time.tv_usec = 0;
169 list_init( &thread->mutex_list );
170 list_init( &thread->system_apc );
171 list_init( &thread->user_apc );
173 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
174 thread->inflight[i].server = thread->inflight[i].client = -1;
177 /* check if address looks valid for a client-side data structure (TEB etc.) */
178 static inline int is_valid_address( void *addr )
180 return addr && !((unsigned long)addr % sizeof(int));
183 /* create a new thread */
184 struct thread *create_thread( int fd, struct process *process )
186 struct thread *thread;
188 if (!(thread = alloc_object( &thread_ops ))) return NULL;
190 init_thread_structure( thread );
192 thread->process = (struct process *)grab_object( process );
193 thread->desktop = process->desktop;
194 if (!current) current = thread;
196 list_add_head( &thread_list, &thread->entry );
198 if (!(thread->id = alloc_ptid( thread )))
200 release_object( thread );
203 if (!(thread->request_fd = create_anonymous_fd( &thread_fd_ops, fd, &thread->obj )))
205 release_object( thread );
209 set_fd_events( thread->request_fd, POLLIN ); /* start listening to events */
210 add_process_thread( thread->process, thread );
214 /* handle a client event */
215 static void thread_poll_event( struct fd *fd, int event )
217 struct thread *thread = get_fd_user( fd );
218 assert( thread->obj.ops == &thread_ops );
220 if (event & (POLLERR | POLLHUP)) kill_thread( thread, 0 );
221 else if (event & POLLIN) read_request( thread );
222 else if (event & POLLOUT) write_reply( thread );
225 /* cleanup everything that is no longer needed by a dead thread */
226 /* used by destroy_thread and kill_thread */
227 static void cleanup_thread( struct thread *thread )
231 clear_apc_queue( &thread->system_apc );
232 clear_apc_queue( &thread->user_apc );
233 free( thread->req_data );
234 free( thread->reply_data );
235 if (thread->request_fd) release_object( thread->request_fd );
236 if (thread->reply_fd) release_object( thread->reply_fd );
237 if (thread->wait_fd) release_object( thread->wait_fd );
238 free( thread->suspend_context );
239 free_msg_queue( thread );
240 cleanup_clipboard_thread(thread);
241 destroy_thread_windows( thread );
242 close_thread_desktop( thread );
243 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
245 if (thread->inflight[i].client != -1)
247 close( thread->inflight[i].server );
248 thread->inflight[i].client = thread->inflight[i].server = -1;
251 thread->req_data = NULL;
252 thread->reply_data = NULL;
253 thread->request_fd = NULL;
254 thread->reply_fd = NULL;
255 thread->wait_fd = NULL;
256 thread->context = NULL;
257 thread->suspend_context = NULL;
261 /* destroy a thread when its refcount is 0 */
262 static void destroy_thread( struct object *obj )
264 struct thread *thread = (struct thread *)obj;
265 assert( obj->ops == &thread_ops );
267 assert( !thread->debug_ctx ); /* cannot still be debugging something */
268 list_remove( &thread->entry );
269 cleanup_thread( thread );
270 release_object( thread->process );
271 if (thread->id) free_ptid( thread->id );
272 if (thread->token) release_object( thread->token );
275 /* dump a thread on stdout for debugging purposes */
276 static void dump_thread( struct object *obj, int verbose )
278 struct thread *thread = (struct thread *)obj;
279 assert( obj->ops == &thread_ops );
281 fprintf( stderr, "Thread id=%04x unix pid=%d unix tid=%d teb=%p state=%d\n",
282 thread->id, thread->unix_pid, thread->unix_tid, thread->teb, thread->state );
285 static int thread_signaled( struct object *obj, struct thread *thread )
287 struct thread *mythread = (struct thread *)obj;
288 return (mythread->state == TERMINATED);
291 static unsigned int thread_map_access( struct object *obj, unsigned int access )
293 if (access & GENERIC_READ) access |= STANDARD_RIGHTS_READ | SYNCHRONIZE;
294 if (access & GENERIC_WRITE) access |= STANDARD_RIGHTS_WRITE | SYNCHRONIZE;
295 if (access & GENERIC_EXECUTE) access |= STANDARD_RIGHTS_EXECUTE;
296 if (access & GENERIC_ALL) access |= THREAD_ALL_ACCESS;
297 return access & ~(GENERIC_READ | GENERIC_WRITE | GENERIC_EXECUTE | GENERIC_ALL);
300 static void dump_thread_apc( struct object *obj, int verbose )
302 struct thread_apc *apc = (struct thread_apc *)obj;
303 assert( obj->ops == &thread_apc_ops );
305 fprintf( stderr, "APC owner=%p type=%u\n", apc->owner, apc->call.type );
308 static int thread_apc_signaled( struct object *obj, struct thread *thread )
310 struct thread_apc *apc = (struct thread_apc *)obj;
311 return apc->executed;
314 /* get a thread pointer from a thread id (and increment the refcount) */
315 struct thread *get_thread_from_id( thread_id_t id )
317 struct object *obj = get_ptid_entry( id );
319 if (obj && obj->ops == &thread_ops) return (struct thread *)grab_object( obj );
320 set_error( STATUS_INVALID_CID );
324 /* get a thread from a handle (and increment the refcount) */
325 struct thread *get_thread_from_handle( obj_handle_t handle, unsigned int access )
327 return (struct thread *)get_handle_obj( current->process, handle,
328 access, &thread_ops );
331 /* find a thread from a Unix tid */
332 struct thread *get_thread_from_tid( int tid )
334 struct thread *thread;
336 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
338 if (thread->unix_tid == tid) return thread;
343 /* find a thread from a Unix pid */
344 struct thread *get_thread_from_pid( int pid )
346 struct thread *thread;
348 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
350 if (thread->unix_pid == pid) return thread;
355 /* set all information about a thread */
356 static void set_thread_info( struct thread *thread,
357 const struct set_thread_info_request *req )
359 if (req->mask & SET_THREAD_INFO_PRIORITY)
360 thread->priority = req->priority;
361 if (req->mask & SET_THREAD_INFO_AFFINITY)
363 if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
364 else thread->affinity = req->affinity;
366 if (req->mask & SET_THREAD_INFO_TOKEN)
367 security_set_thread_token( thread, req->token );
370 /* stop a thread (at the Unix level) */
371 void stop_thread( struct thread *thread )
373 if (thread->context) return; /* already inside a debug event, no need for a signal */
374 /* can't stop a thread while initialisation is in progress */
375 if (is_process_init_done(thread->process)) send_thread_signal( thread, SIGUSR1 );
378 /* suspend a thread */
379 static int suspend_thread( struct thread *thread )
381 int old_count = thread->suspend;
382 if (thread->suspend < MAXIMUM_SUSPEND_COUNT)
384 if (!(thread->process->suspend + thread->suspend++)) stop_thread( thread );
386 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED );
390 /* resume a thread */
391 static int resume_thread( struct thread *thread )
393 int old_count = thread->suspend;
394 if (thread->suspend > 0)
396 if (!(--thread->suspend + thread->process->suspend)) wake_thread( thread );
401 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
402 int add_queue( struct object *obj, struct wait_queue_entry *entry )
406 list_add_tail( &obj->wait_queue, &entry->entry );
410 /* remove a thread from an object wait queue */
411 void remove_queue( struct object *obj, struct wait_queue_entry *entry )
413 list_remove( &entry->entry );
414 release_object( obj );
418 static void end_wait( struct thread *thread )
420 struct thread_wait *wait = thread->wait;
421 struct wait_queue_entry *entry;
425 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
426 entry->obj->ops->remove_queue( entry->obj, entry );
427 if (wait->user) remove_timeout_user( wait->user );
428 thread->wait = wait->next;
432 /* build the thread wait structure */
433 static int wait_on( int count, struct object *objects[], int flags, const abs_time_t *timeout )
435 struct thread_wait *wait;
436 struct wait_queue_entry *entry;
439 if (!(wait = mem_alloc( sizeof(*wait) + (count-1) * sizeof(*entry) ))) return 0;
440 wait->next = current->wait;
441 wait->thread = current;
445 current->wait = wait;
446 if (flags & SELECT_TIMEOUT)
448 wait->timeout.tv_sec = timeout->sec;
449 wait->timeout.tv_usec = timeout->usec;
452 for (i = 0, entry = wait->queues; i < count; i++, entry++)
454 struct object *obj = objects[i];
455 entry->thread = current;
456 if (!obj->ops->add_queue( obj, entry ))
466 /* check if the thread waiting condition is satisfied */
467 static int check_wait( struct thread *thread )
470 struct thread_wait *wait = thread->wait;
471 struct wait_queue_entry *entry = wait->queues;
473 /* Suspended threads may not acquire locks, but they can run system APCs */
474 if (thread->process->suspend + thread->suspend > 0)
476 if ((wait->flags & SELECT_INTERRUPTIBLE) && !list_empty( &thread->system_apc ))
477 return STATUS_USER_APC;
482 if (wait->flags & SELECT_ALL)
485 /* Note: we must check them all anyway, as some objects may
486 * want to do something when signaled, even if others are not */
487 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
488 not_ok |= !entry->obj->ops->signaled( entry->obj, thread );
489 if (not_ok) goto other_checks;
490 /* Wait satisfied: tell it to all objects */
492 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
493 if (entry->obj->ops->satisfied( entry->obj, thread ))
494 signaled = STATUS_ABANDONED_WAIT_0;
499 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
501 if (!entry->obj->ops->signaled( entry->obj, thread )) continue;
502 /* Wait satisfied: tell it to the object */
504 if (entry->obj->ops->satisfied( entry->obj, thread ))
505 signaled = i + STATUS_ABANDONED_WAIT_0;
511 if ((wait->flags & SELECT_INTERRUPTIBLE) && !list_empty(&thread->system_apc)) return STATUS_USER_APC;
512 if ((wait->flags & SELECT_ALERTABLE) && !list_empty(&thread->user_apc)) return STATUS_USER_APC;
513 if (wait->flags & SELECT_TIMEOUT)
515 if (!time_before( ¤t_time, &wait->timeout )) return STATUS_TIMEOUT;
520 /* send the wakeup signal to a thread */
521 static int send_thread_wakeup( struct thread *thread, void *cookie, int signaled )
523 struct wake_up_reply reply;
526 reply.cookie = cookie;
527 reply.signaled = signaled;
528 if ((ret = write( get_unix_fd( thread->wait_fd ), &reply, sizeof(reply) )) == sizeof(reply))
531 fatal_protocol_error( thread, "partial wakeup write %d\n", ret );
532 else if (errno == EPIPE)
533 kill_thread( thread, 0 ); /* normal death */
535 fatal_protocol_perror( thread, "write" );
539 /* attempt to wake up a thread */
540 /* return >0 if OK, 0 if the wait condition is still not satisfied */
541 int wake_thread( struct thread *thread )
546 for (count = 0; thread->wait; count++)
548 if ((signaled = check_wait( thread )) == -1) break;
550 cookie = thread->wait->cookie;
551 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
552 thread->id, signaled, cookie );
554 if (send_thread_wakeup( thread, cookie, signaled ) == -1) /* error */
560 /* thread wait timeout */
561 static void thread_timeout( void *ptr )
563 struct thread_wait *wait = ptr;
564 struct thread *thread = wait->thread;
565 void *cookie = wait->cookie;
568 if (thread->wait != wait) return; /* not the top-level wait, ignore it */
569 if (thread->suspend + thread->process->suspend > 0) return; /* suspended, ignore it */
571 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
572 thread->id, (int)STATUS_TIMEOUT, cookie );
574 if (send_thread_wakeup( thread, cookie, STATUS_TIMEOUT ) == -1) return;
575 /* check if other objects have become signaled in the meantime */
576 wake_thread( thread );
579 /* try signaling an event flag, a semaphore or a mutex */
580 static int signal_object( obj_handle_t handle )
585 obj = get_handle_obj( current->process, handle, 0, NULL );
588 ret = obj->ops->signal( obj, get_handle_access( current->process, handle ));
589 release_object( obj );
594 /* select on a list of handles */
595 static void select_on( int count, void *cookie, const obj_handle_t *handles,
596 int flags, const abs_time_t *timeout, obj_handle_t signal_obj )
599 struct object *objects[MAXIMUM_WAIT_OBJECTS];
601 if ((count < 0) || (count > MAXIMUM_WAIT_OBJECTS))
603 set_error( STATUS_INVALID_PARAMETER );
606 for (i = 0; i < count; i++)
608 if (!(objects[i] = get_handle_obj( current->process, handles[i], SYNCHRONIZE, NULL )))
612 if (i < count) goto done;
613 if (!wait_on( count, objects, flags, timeout )) goto done;
615 /* signal the object */
618 if (!signal_object( signal_obj ))
623 /* check if we woke ourselves up */
624 if (!current->wait) goto done;
627 if ((ret = check_wait( current )) != -1)
629 /* condition is already satisfied */
635 /* now we need to wait */
636 if (flags & SELECT_TIMEOUT)
638 if (!(current->wait->user = add_timeout_user( ¤t->wait->timeout,
639 thread_timeout, current->wait )))
645 current->wait->cookie = cookie;
646 set_error( STATUS_PENDING );
649 while (--i >= 0) release_object( objects[i] );
652 /* attempt to wake threads sleeping on the object wait queue */
653 void wake_up( struct object *obj, int max )
655 struct list *ptr, *next;
657 LIST_FOR_EACH_SAFE( ptr, next, &obj->wait_queue )
659 struct wait_queue_entry *entry = LIST_ENTRY( ptr, struct wait_queue_entry, entry );
660 if (wake_thread( entry->thread ))
662 if (max && !--max) break;
667 /* return the apc queue to use for a given apc type */
668 static inline struct list *get_apc_queue( struct thread *thread, enum apc_type type )
675 return &thread->user_apc;
677 return &thread->system_apc;
681 /* queue an async procedure call */
682 int thread_queue_apc( struct thread *thread, struct object *owner, const apc_call_t *call_data )
684 struct thread_apc *apc;
685 struct list *queue = get_apc_queue( thread, call_data->type );
687 /* cancel a possible previous APC with the same owner */
688 if (owner) thread_cancel_apc( thread, owner, call_data->type );
689 if (thread->state == TERMINATED) return 0;
691 if (!(apc = alloc_object( &thread_apc_ops ))) return 0;
692 apc->call = *call_data;
695 list_add_tail( queue, &apc->entry );
696 if (!list_prev( queue, &apc->entry )) /* first one */
697 wake_thread( thread );
702 /* cancel the async procedure call owned by a specific object */
703 void thread_cancel_apc( struct thread *thread, struct object *owner, enum apc_type type )
705 struct thread_apc *apc;
706 struct list *queue = get_apc_queue( thread, type );
708 LIST_FOR_EACH_ENTRY( apc, queue, struct thread_apc, entry )
710 if (apc->owner != owner) continue;
711 list_remove( &apc->entry );
713 wake_up( &apc->obj, 0 );
714 release_object( apc );
719 /* remove the head apc from the queue; the returned object must be released by the caller */
720 static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only )
722 struct thread_apc *apc = NULL;
723 struct list *ptr = list_head( &thread->system_apc );
725 if (!ptr && !system_only) ptr = list_head( &thread->user_apc );
728 apc = LIST_ENTRY( ptr, struct thread_apc, entry );
734 /* clear an APC queue, cancelling all the APCs on it */
735 static void clear_apc_queue( struct list *queue )
739 while ((ptr = list_head( queue )))
741 struct thread_apc *apc = LIST_ENTRY( ptr, struct thread_apc, entry );
742 list_remove( &apc->entry );
744 wake_up( &apc->obj, 0 );
745 release_object( apc );
749 /* add an fd to the inflight list */
750 /* return list index, or -1 on error */
751 int thread_add_inflight_fd( struct thread *thread, int client, int server )
755 if (server == -1) return -1;
762 /* first check if we already have an entry for this fd */
763 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
764 if (thread->inflight[i].client == client)
766 close( thread->inflight[i].server );
767 thread->inflight[i].server = server;
771 /* now find a free spot to store it */
772 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
773 if (thread->inflight[i].client == -1)
775 thread->inflight[i].client = client;
776 thread->inflight[i].server = server;
782 /* get an inflight fd and purge it from the list */
783 /* the fd must be closed when no longer used */
784 int thread_get_inflight_fd( struct thread *thread, int client )
788 if (client == -1) return -1;
792 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
794 if (thread->inflight[i].client == client)
796 ret = thread->inflight[i].server;
797 thread->inflight[i].server = thread->inflight[i].client = -1;
801 } while (!receive_fd( thread->process )); /* in case it is still in the socket buffer */
805 /* kill a thread on the spot */
806 void kill_thread( struct thread *thread, int violent_death )
808 if (thread->state == TERMINATED) return; /* already killed */
809 thread->state = TERMINATED;
810 thread->exit_time = current_time;
811 if (current == thread) current = NULL;
813 fprintf( stderr,"%04x: *killed* exit_code=%d\n",
814 thread->id, thread->exit_code );
817 while (thread->wait) end_wait( thread );
818 send_thread_wakeup( thread, NULL, STATUS_PENDING );
819 /* if it is waiting on the socket, we don't need to send a SIGTERM */
822 kill_console_processes( thread, 0 );
823 debug_exit_thread( thread );
824 abandon_mutexes( thread );
825 wake_up( &thread->obj, 0 );
826 if (violent_death) send_thread_signal( thread, SIGTERM );
827 cleanup_thread( thread );
828 remove_process_thread( thread->process, thread );
829 release_object( thread );
832 /* trigger a breakpoint event in a given thread */
833 void break_thread( struct thread *thread )
835 struct debug_event_exception data;
837 assert( thread->context );
839 data.record.ExceptionCode = STATUS_BREAKPOINT;
840 data.record.ExceptionFlags = EXCEPTION_CONTINUABLE;
841 data.record.ExceptionRecord = NULL;
842 data.record.ExceptionAddress = get_context_ip( thread->context );
843 data.record.NumberParameters = 0;
845 generate_debug_event( thread, EXCEPTION_DEBUG_EVENT, &data );
846 thread->debug_break = 0;
849 /* take a snapshot of currently running threads */
850 struct thread_snapshot *thread_snap( int *count )
852 struct thread_snapshot *snapshot, *ptr;
853 struct thread *thread;
856 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
857 if (thread->state != TERMINATED) total++;
858 if (!total || !(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
860 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
862 if (thread->state == TERMINATED) continue;
863 ptr->thread = thread;
864 ptr->count = thread->obj.refcount;
865 ptr->priority = thread->priority;
866 grab_object( thread );
873 /* gets the current impersonation token */
874 struct token *thread_get_impersonation_token( struct thread *thread )
877 return thread->token;
879 return thread->process->token;
882 /* create a new thread */
883 DECL_HANDLER(new_thread)
885 struct thread *thread;
886 int request_fd = thread_get_inflight_fd( current, req->request_fd );
888 if (request_fd == -1 || fcntl( request_fd, F_SETFL, O_NONBLOCK ) == -1)
890 if (request_fd != -1) close( request_fd );
891 set_error( STATUS_INVALID_HANDLE );
895 if ((thread = create_thread( request_fd, current->process )))
897 if (req->suspend) thread->suspend++;
898 reply->tid = get_thread_id( thread );
899 if ((reply->handle = alloc_handle( current->process, thread, req->access, req->attributes )))
901 /* thread object will be released when the thread gets killed */
904 kill_thread( thread, 1 );
908 /* initialize a new thread */
909 DECL_HANDLER(init_thread)
911 struct process *process = current->process;
912 int reply_fd = thread_get_inflight_fd( current, req->reply_fd );
913 int wait_fd = thread_get_inflight_fd( current, req->wait_fd );
915 if (current->reply_fd) /* already initialised */
917 set_error( STATUS_INVALID_PARAMETER );
921 if (reply_fd == -1 || fcntl( reply_fd, F_SETFL, O_NONBLOCK ) == -1) goto error;
923 current->reply_fd = create_anonymous_fd( &thread_fd_ops, reply_fd, ¤t->obj );
925 if (!current->reply_fd) goto error;
929 set_error( STATUS_TOO_MANY_OPENED_FILES ); /* most likely reason */
932 if (!(current->wait_fd = create_anonymous_fd( &thread_fd_ops, wait_fd, ¤t->obj )))
935 if (!is_valid_address(req->teb) || !is_valid_address(req->peb) || !is_valid_address(req->ldt_copy))
937 set_error( STATUS_INVALID_PARAMETER );
941 current->unix_pid = req->unix_pid;
942 current->unix_tid = req->unix_tid;
943 current->teb = req->teb;
945 if (!process->peb) /* first thread, initialize the process too */
947 process->unix_pid = current->unix_pid;
948 process->peb = req->peb;
949 process->ldt_copy = req->ldt_copy;
950 reply->info_size = init_process( current );
954 if (process->unix_pid != current->unix_pid)
955 process->unix_pid = -1; /* can happen with linuxthreads */
956 if (current->suspend + process->suspend > 0) stop_thread( current );
957 generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, req->entry );
959 debug_level = max( debug_level, req->debug_level );
961 reply->pid = get_process_id( process );
962 reply->tid = get_thread_id( current );
963 reply->version = SERVER_PROTOCOL_VERSION;
964 reply->server_start.sec = server_start_time.tv_sec;
965 reply->server_start.usec = server_start_time.tv_usec;
969 if (reply_fd != -1) close( reply_fd );
970 if (wait_fd != -1) close( wait_fd );
973 /* terminate a thread */
974 DECL_HANDLER(terminate_thread)
976 struct thread *thread;
980 if ((thread = get_thread_from_handle( req->handle, THREAD_TERMINATE )))
982 thread->exit_code = req->exit_code;
983 if (thread != current) kill_thread( thread, 1 );
987 reply->last = (thread->process->running_threads == 1);
989 release_object( thread );
993 /* open a handle to a thread */
994 DECL_HANDLER(open_thread)
996 struct thread *thread = get_thread_from_id( req->tid );
1001 reply->handle = alloc_handle( current->process, thread, req->access, req->attributes );
1002 release_object( thread );
1006 /* fetch information about a thread */
1007 DECL_HANDLER(get_thread_info)
1009 struct thread *thread;
1010 obj_handle_t handle = req->handle;
1012 if (!handle) thread = get_thread_from_id( req->tid_in );
1013 else thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION );
1017 reply->pid = get_process_id( thread->process );
1018 reply->tid = get_thread_id( thread );
1019 reply->teb = thread->teb;
1020 reply->exit_code = (thread->state == TERMINATED) ? thread->exit_code : STATUS_PENDING;
1021 reply->priority = thread->priority;
1022 reply->affinity = thread->affinity;
1023 reply->creation_time.sec = thread->creation_time.tv_sec;
1024 reply->creation_time.usec = thread->creation_time.tv_usec;
1025 reply->exit_time.sec = thread->exit_time.tv_sec;
1026 reply->exit_time.usec = thread->exit_time.tv_usec;
1027 reply->last = thread->process->running_threads == 1;
1029 release_object( thread );
1033 /* set information about a thread */
1034 DECL_HANDLER(set_thread_info)
1036 struct thread *thread;
1038 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_INFORMATION )))
1040 set_thread_info( thread, req );
1041 release_object( thread );
1045 /* suspend a thread */
1046 DECL_HANDLER(suspend_thread)
1048 struct thread *thread;
1050 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
1052 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
1053 else reply->count = suspend_thread( thread );
1054 release_object( thread );
1058 /* resume a thread */
1059 DECL_HANDLER(resume_thread)
1061 struct thread *thread;
1063 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
1065 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
1066 else reply->count = resume_thread( thread );
1067 release_object( thread );
1071 /* select on a handle list */
1072 DECL_HANDLER(select)
1074 int count = get_req_data_size() / sizeof(obj_handle_t);
1075 select_on( count, req->cookie, get_req_data(), req->flags, &req->timeout, req->signal );
1078 /* queue an APC for a thread */
1079 DECL_HANDLER(queue_apc)
1081 struct thread *thread;
1082 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
1084 switch( req->call.type )
1088 thread_queue_apc( thread, NULL, &req->call );
1091 set_error( STATUS_INVALID_PARAMETER );
1094 release_object( thread );
1098 /* get next APC to call */
1099 DECL_HANDLER(get_apc)
1101 struct thread_apc *apc;
1102 int system_only = !req->alertable;
1106 if (!(apc = (struct thread_apc *)get_handle_obj( current->process, req->prev,
1107 0, &thread_apc_ops ))) return;
1109 wake_up( &apc->obj, 0 );
1110 close_handle( current->process, req->prev );
1111 release_object( apc );
1114 if (current->suspend + current->process->suspend > 0) system_only = 1;
1118 if (!(apc = thread_dequeue_apc( current, system_only )))
1121 set_error( STATUS_PENDING );
1124 /* Optimization: ignore APC_NONE calls, they are only used to
1125 * wake up a thread, but since we got here the thread woke up already.
1127 if (apc->call.type != APC_NONE) break;
1129 wake_up( &apc->obj, 0 );
1130 release_object( apc );
1133 if ((reply->handle = alloc_handle( current->process, apc, SYNCHRONIZE, 0 )))
1134 reply->call = apc->call;
1135 release_object( apc );
1138 /* retrieve the current context of a thread */
1139 DECL_HANDLER(get_thread_context)
1141 struct thread *thread;
1144 if (get_reply_max_size() < sizeof(CONTEXT))
1146 set_error( STATUS_INVALID_PARAMETER );
1149 if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
1153 if (thread != current || !thread->suspend_context)
1155 /* not suspended, shouldn't happen */
1156 set_error( STATUS_INVALID_PARAMETER );
1160 if (thread->context == thread->suspend_context) thread->context = NULL;
1161 set_reply_data_ptr( thread->suspend_context, sizeof(CONTEXT) );
1162 thread->suspend_context = NULL;
1165 else if (thread != current && !thread->context)
1167 /* thread is not suspended, retry (if it's still running) */
1168 if (thread->state != RUNNING) set_error( STATUS_ACCESS_DENIED );
1169 else set_error( STATUS_PENDING );
1171 else if ((context = set_reply_data_size( sizeof(CONTEXT) )))
1173 unsigned int flags = get_context_system_regs( req->flags );
1175 memset( context, 0, sizeof(CONTEXT) );
1176 context->ContextFlags = get_context_cpu_flag();
1177 if (thread->context) copy_context( context, thread->context, req->flags & ~flags );
1178 if (flags) get_thread_context( thread, context, flags );
1180 reply->self = (thread == current);
1181 release_object( thread );
1184 /* set the current context of a thread */
1185 DECL_HANDLER(set_thread_context)
1187 struct thread *thread;
1189 if (get_req_data_size() < sizeof(CONTEXT))
1191 set_error( STATUS_INVALID_PARAMETER );
1194 if (!(thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT ))) return;
1198 if (thread != current || thread->context)
1200 /* nested suspend or exception, shouldn't happen */
1201 set_error( STATUS_INVALID_PARAMETER );
1203 else if ((thread->suspend_context = mem_alloc( sizeof(CONTEXT) )))
1205 memcpy( thread->suspend_context, get_req_data(), sizeof(CONTEXT) );
1206 thread->context = thread->suspend_context;
1207 if (thread->debug_break) break_thread( thread );
1210 else if (thread != current && !thread->context)
1212 /* thread is not suspended, retry (if it's still running) */
1213 if (thread->state != RUNNING) set_error( STATUS_ACCESS_DENIED );
1214 else set_error( STATUS_PENDING );
1218 const CONTEXT *context = get_req_data();
1219 unsigned int flags = get_context_system_regs( req->flags );
1221 if (flags) set_thread_context( thread, context, flags );
1222 if (thread->context && !get_error())
1223 copy_context( thread->context, context, req->flags & ~flags );
1225 reply->self = (thread == current);
1226 release_object( thread );
1229 /* fetch a selector entry for a thread */
1230 DECL_HANDLER(get_selector_entry)
1232 struct thread *thread;
1233 if ((thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION )))
1235 get_selector_entry( thread, req->entry, &reply->base, &reply->limit, &reply->flags );
1236 release_object( thread );