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>
43 #define WIN32_NO_STATUS
57 static const unsigned int supported_cpus
= CPU_FLAG(CPU_x86
);
58 #elif defined(__x86_64__)
59 static const unsigned int supported_cpus
= CPU_FLAG(CPU_x86_64
) | CPU_FLAG(CPU_x86
);
60 #elif defined(__powerpc__)
61 static const unsigned int supported_cpus
= CPU_FLAG(CPU_POWERPC
);
62 #elif defined(__arm__)
63 static const unsigned int supported_cpus
= CPU_FLAG(CPU_ARM
);
64 #elif defined(__aarch64__)
65 static const unsigned int supported_cpus
= CPU_FLAG(CPU_ARM64
) | CPU_FLAG(CPU_ARM
);
67 #error Unsupported CPU
74 struct thread_wait
*next
; /* next wait structure for this thread */
75 struct thread
*thread
; /* owner thread */
76 int count
; /* count of objects */
79 enum select_op select
;
80 client_ptr_t key
; /* wait key for keyed events */
81 client_ptr_t cookie
; /* magic cookie to return to client */
83 struct timeout_user
*user
;
84 struct wait_queue_entry queues
[1];
87 /* asynchronous procedure calls */
91 struct object obj
; /* object header */
92 struct list entry
; /* queue linked list */
93 struct thread
*caller
; /* thread that queued this apc */
94 struct object
*owner
; /* object that queued this apc */
95 int executed
; /* has it been executed by the client? */
96 apc_call_t call
; /* call arguments */
97 apc_result_t result
; /* call results once executed */
100 static void dump_thread_apc( struct object
*obj
, int verbose
);
101 static int thread_apc_signaled( struct object
*obj
, struct wait_queue_entry
*entry
);
102 static void thread_apc_destroy( struct object
*obj
);
103 static void clear_apc_queue( struct list
*queue
);
105 static const struct object_ops thread_apc_ops
=
107 sizeof(struct thread_apc
), /* size */
108 dump_thread_apc
, /* dump */
109 no_get_type
, /* get_type */
110 add_queue
, /* add_queue */
111 remove_queue
, /* remove_queue */
112 thread_apc_signaled
, /* signaled */
113 no_satisfied
, /* satisfied */
114 no_signal
, /* signal */
115 no_get_fd
, /* get_fd */
116 no_map_access
, /* map_access */
117 default_get_sd
, /* get_sd */
118 default_set_sd
, /* set_sd */
119 no_lookup_name
, /* lookup_name */
120 no_link_name
, /* link_name */
121 NULL
, /* unlink_name */
122 no_open_file
, /* open_file */
123 no_close_handle
, /* close_handle */
124 thread_apc_destroy
/* destroy */
128 /* thread operations */
130 static void dump_thread( struct object
*obj
, int verbose
);
131 static int thread_signaled( struct object
*obj
, struct wait_queue_entry
*entry
);
132 static unsigned int thread_map_access( struct object
*obj
, unsigned int access
);
133 static void thread_poll_event( struct fd
*fd
, int event
);
134 static void destroy_thread( struct object
*obj
);
136 static const struct object_ops thread_ops
=
138 sizeof(struct thread
), /* size */
139 dump_thread
, /* dump */
140 no_get_type
, /* get_type */
141 add_queue
, /* add_queue */
142 remove_queue
, /* remove_queue */
143 thread_signaled
, /* signaled */
144 no_satisfied
, /* satisfied */
145 no_signal
, /* signal */
146 no_get_fd
, /* get_fd */
147 thread_map_access
, /* map_access */
148 default_get_sd
, /* get_sd */
149 default_set_sd
, /* set_sd */
150 no_lookup_name
, /* lookup_name */
151 no_link_name
, /* link_name */
152 NULL
, /* unlink_name */
153 no_open_file
, /* open_file */
154 no_close_handle
, /* close_handle */
155 destroy_thread
/* destroy */
158 static const struct fd_ops thread_fd_ops
=
160 NULL
, /* get_poll_events */
161 thread_poll_event
, /* poll_event */
163 NULL
, /* get_fd_type */
165 NULL
, /* queue_async */
166 NULL
/* reselect_async */
169 static struct list thread_list
= LIST_INIT(thread_list
);
171 /* initialize the structure for a newly allocated thread */
172 static inline void init_thread_structure( struct thread
*thread
)
176 thread
->unix_pid
= -1; /* not known yet */
177 thread
->unix_tid
= -1; /* not known yet */
178 thread
->context
= NULL
;
179 thread
->suspend_context
= NULL
;
181 thread
->entry_point
= 0;
182 thread
->debug_ctx
= NULL
;
183 thread
->debug_event
= NULL
;
184 thread
->debug_break
= 0;
185 thread
->system_regs
= 0;
186 thread
->queue
= NULL
;
189 thread
->req_data
= NULL
;
190 thread
->req_toread
= 0;
191 thread
->reply_data
= NULL
;
192 thread
->reply_towrite
= 0;
193 thread
->request_fd
= NULL
;
194 thread
->reply_fd
= NULL
;
195 thread
->wait_fd
= NULL
;
196 thread
->state
= RUNNING
;
197 thread
->exit_code
= 0;
198 thread
->priority
= 0;
200 thread
->desktop_users
= 0;
201 thread
->token
= NULL
;
203 thread
->creation_time
= current_time
;
204 thread
->exit_time
= 0;
206 list_init( &thread
->mutex_list
);
207 list_init( &thread
->system_apc
);
208 list_init( &thread
->user_apc
);
210 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
211 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
214 /* check if address looks valid for a client-side data structure (TEB etc.) */
215 static inline int is_valid_address( client_ptr_t addr
)
217 return addr
&& !(addr
% sizeof(int));
220 /* create a new thread */
221 struct thread
*create_thread( int fd
, struct process
*process
, const struct security_descriptor
*sd
)
223 struct thread
*thread
;
228 if (pipe( request_pipe
) == -1)
233 if (send_client_fd( process
, request_pipe
[1], SERVER_PROTOCOL_VERSION
) == -1)
235 close( request_pipe
[0] );
236 close( request_pipe
[1] );
239 close( request_pipe
[1] );
240 fd
= request_pipe
[0];
243 if (process
->is_terminating
)
246 set_error( STATUS_PROCESS_IS_TERMINATING
);
250 if (!(thread
= alloc_object( &thread_ops
)))
256 init_thread_structure( thread
);
258 thread
->process
= (struct process
*)grab_object( process
);
259 thread
->desktop
= process
->desktop
;
260 thread
->affinity
= process
->affinity
;
261 if (!current
) current
= thread
;
263 list_add_head( &thread_list
, &thread
->entry
);
265 if (sd
&& !set_sd_defaults_from_token( &thread
->obj
, sd
,
266 OWNER_SECURITY_INFORMATION
| GROUP_SECURITY_INFORMATION
|
267 DACL_SECURITY_INFORMATION
| SACL_SECURITY_INFORMATION
,
271 release_object( thread
);
274 if (!(thread
->id
= alloc_ptid( thread
)))
277 release_object( thread
);
280 if (!(thread
->request_fd
= create_anonymous_fd( &thread_fd_ops
, fd
, &thread
->obj
, 0 )))
282 release_object( thread
);
286 set_fd_events( thread
->request_fd
, POLLIN
); /* start listening to events */
287 add_process_thread( thread
->process
, thread
);
291 /* handle a client event */
292 static void thread_poll_event( struct fd
*fd
, int event
)
294 struct thread
*thread
= get_fd_user( fd
);
295 assert( thread
->obj
.ops
== &thread_ops
);
297 grab_object( thread
);
298 if (event
& (POLLERR
| POLLHUP
)) kill_thread( thread
, 0 );
299 else if (event
& POLLIN
) read_request( thread
);
300 else if (event
& POLLOUT
) write_reply( thread
);
301 release_object( thread
);
304 /* cleanup everything that is no longer needed by a dead thread */
305 /* used by destroy_thread and kill_thread */
306 static void cleanup_thread( struct thread
*thread
)
310 clear_apc_queue( &thread
->system_apc
);
311 clear_apc_queue( &thread
->user_apc
);
312 free( thread
->req_data
);
313 free( thread
->reply_data
);
314 if (thread
->request_fd
) release_object( thread
->request_fd
);
315 if (thread
->reply_fd
) release_object( thread
->reply_fd
);
316 if (thread
->wait_fd
) release_object( thread
->wait_fd
);
317 free( thread
->suspend_context
);
318 cleanup_clipboard_thread(thread
);
319 destroy_thread_windows( thread
);
320 free_msg_queue( thread
);
321 close_thread_desktop( thread
);
322 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
324 if (thread
->inflight
[i
].client
!= -1)
326 close( thread
->inflight
[i
].server
);
327 thread
->inflight
[i
].client
= thread
->inflight
[i
].server
= -1;
330 thread
->req_data
= NULL
;
331 thread
->reply_data
= NULL
;
332 thread
->request_fd
= NULL
;
333 thread
->reply_fd
= NULL
;
334 thread
->wait_fd
= NULL
;
335 thread
->context
= NULL
;
336 thread
->suspend_context
= NULL
;
340 /* destroy a thread when its refcount is 0 */
341 static void destroy_thread( struct object
*obj
)
343 struct thread
*thread
= (struct thread
*)obj
;
344 assert( obj
->ops
== &thread_ops
);
346 assert( !thread
->debug_ctx
); /* cannot still be debugging something */
347 list_remove( &thread
->entry
);
348 cleanup_thread( thread
);
349 release_object( thread
->process
);
350 if (thread
->id
) free_ptid( thread
->id
);
351 if (thread
->token
) release_object( thread
->token
);
354 /* dump a thread on stdout for debugging purposes */
355 static void dump_thread( struct object
*obj
, int verbose
)
357 struct thread
*thread
= (struct thread
*)obj
;
358 assert( obj
->ops
== &thread_ops
);
360 fprintf( stderr
, "Thread id=%04x unix pid=%d unix tid=%d state=%d\n",
361 thread
->id
, thread
->unix_pid
, thread
->unix_tid
, thread
->state
);
364 static int thread_signaled( struct object
*obj
, struct wait_queue_entry
*entry
)
366 struct thread
*mythread
= (struct thread
*)obj
;
367 return (mythread
->state
== TERMINATED
);
370 static unsigned int thread_map_access( struct object
*obj
, unsigned int access
)
372 if (access
& GENERIC_READ
) access
|= STANDARD_RIGHTS_READ
| THREAD_QUERY_INFORMATION
| THREAD_GET_CONTEXT
;
373 if (access
& GENERIC_WRITE
) access
|= STANDARD_RIGHTS_WRITE
| THREAD_SET_INFORMATION
| THREAD_SET_CONTEXT
|
374 THREAD_TERMINATE
| THREAD_SUSPEND_RESUME
;
375 if (access
& GENERIC_EXECUTE
) access
|= STANDARD_RIGHTS_EXECUTE
| SYNCHRONIZE
| THREAD_QUERY_LIMITED_INFORMATION
;
376 if (access
& GENERIC_ALL
) access
|= THREAD_ALL_ACCESS
;
378 if (access
& THREAD_QUERY_INFORMATION
) access
|= THREAD_QUERY_LIMITED_INFORMATION
;
379 if (access
& THREAD_SET_INFORMATION
) access
|= THREAD_SET_LIMITED_INFORMATION
;
381 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
384 static void dump_thread_apc( struct object
*obj
, int verbose
)
386 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
387 assert( obj
->ops
== &thread_apc_ops
);
389 fprintf( stderr
, "APC owner=%p type=%u\n", apc
->owner
, apc
->call
.type
);
392 static int thread_apc_signaled( struct object
*obj
, struct wait_queue_entry
*entry
)
394 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
395 return apc
->executed
;
398 static void thread_apc_destroy( struct object
*obj
)
400 struct thread_apc
*apc
= (struct thread_apc
*)obj
;
401 if (apc
->caller
) release_object( apc
->caller
);
402 if (apc
->owner
) release_object( apc
->owner
);
405 /* queue an async procedure call */
406 static struct thread_apc
*create_apc( struct object
*owner
, const apc_call_t
*call_data
)
408 struct thread_apc
*apc
;
410 if ((apc
= alloc_object( &thread_apc_ops
)))
412 apc
->call
= *call_data
;
416 apc
->result
.type
= APC_NONE
;
417 if (owner
) grab_object( owner
);
422 /* get a thread pointer from a thread id (and increment the refcount) */
423 struct thread
*get_thread_from_id( thread_id_t id
)
425 struct object
*obj
= get_ptid_entry( id
);
427 if (obj
&& obj
->ops
== &thread_ops
) return (struct thread
*)grab_object( obj
);
428 set_error( STATUS_INVALID_CID
);
432 /* get a thread from a handle (and increment the refcount) */
433 struct thread
*get_thread_from_handle( obj_handle_t handle
, unsigned int access
)
435 return (struct thread
*)get_handle_obj( current
->process
, handle
,
436 access
, &thread_ops
);
439 /* find a thread from a Unix tid */
440 struct thread
*get_thread_from_tid( int tid
)
442 struct thread
*thread
;
444 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
446 if (thread
->unix_tid
== tid
) return thread
;
451 /* find a thread from a Unix pid */
452 struct thread
*get_thread_from_pid( int pid
)
454 struct thread
*thread
;
456 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
458 if (thread
->unix_pid
== pid
) return thread
;
463 int set_thread_affinity( struct thread
*thread
, affinity_t affinity
)
466 #ifdef HAVE_SCHED_SETAFFINITY
467 if (thread
->unix_tid
!= -1)
474 for (i
= 0, mask
= 1; mask
; i
++, mask
<<= 1)
475 if (affinity
& mask
) CPU_SET( i
, &set
);
477 ret
= sched_setaffinity( thread
->unix_tid
, sizeof(set
), &set
);
480 if (!ret
) thread
->affinity
= affinity
;
484 affinity_t
get_thread_affinity( struct thread
*thread
)
487 #ifdef HAVE_SCHED_SETAFFINITY
488 if (thread
->unix_tid
!= -1)
493 if (!sched_getaffinity( thread
->unix_tid
, sizeof(set
), &set
))
494 for (i
= 0; i
< 8 * sizeof(mask
); i
++)
495 if (CPU_ISSET( i
, &set
)) mask
|= (affinity_t
)1 << i
;
498 if (!mask
) mask
= ~(affinity_t
)0;
502 #define THREAD_PRIORITY_REALTIME_HIGHEST 6
503 #define THREAD_PRIORITY_REALTIME_LOWEST -7
505 /* set all information about a thread */
506 static void set_thread_info( struct thread
*thread
,
507 const struct set_thread_info_request
*req
)
509 if (req
->mask
& SET_THREAD_INFO_PRIORITY
)
511 int max
= THREAD_PRIORITY_HIGHEST
;
512 int min
= THREAD_PRIORITY_LOWEST
;
513 if (thread
->process
->priority
== PROCESS_PRIOCLASS_REALTIME
)
515 max
= THREAD_PRIORITY_REALTIME_HIGHEST
;
516 min
= THREAD_PRIORITY_REALTIME_LOWEST
;
518 if ((req
->priority
>= min
&& req
->priority
<= max
) ||
519 req
->priority
== THREAD_PRIORITY_IDLE
||
520 req
->priority
== THREAD_PRIORITY_TIME_CRITICAL
)
521 thread
->priority
= req
->priority
;
523 set_error( STATUS_INVALID_PARAMETER
);
525 if (req
->mask
& SET_THREAD_INFO_AFFINITY
)
527 if ((req
->affinity
& thread
->process
->affinity
) != req
->affinity
)
528 set_error( STATUS_INVALID_PARAMETER
);
529 else if (thread
->state
== TERMINATED
)
530 set_error( STATUS_THREAD_IS_TERMINATING
);
531 else if (set_thread_affinity( thread
, req
->affinity
))
534 if (req
->mask
& SET_THREAD_INFO_TOKEN
)
535 security_set_thread_token( thread
, req
->token
);
536 if (req
->mask
& SET_THREAD_INFO_ENTRYPOINT
)
537 thread
->entry_point
= req
->entry_point
;
540 /* stop a thread (at the Unix level) */
541 void stop_thread( struct thread
*thread
)
543 if (thread
->context
) return; /* already inside a debug event, no need for a signal */
544 /* can't stop a thread while initialisation is in progress */
545 if (is_process_init_done(thread
->process
)) send_thread_signal( thread
, SIGUSR1
);
548 /* stop a thread if it's supposed to be suspended */
549 void stop_thread_if_suspended( struct thread
*thread
)
551 if (thread
->suspend
+ thread
->process
->suspend
> 0) stop_thread( thread
);
554 /* suspend a thread */
555 static int suspend_thread( struct thread
*thread
)
557 int old_count
= thread
->suspend
;
558 if (thread
->suspend
< MAXIMUM_SUSPEND_COUNT
)
560 if (!(thread
->process
->suspend
+ thread
->suspend
++)) stop_thread( thread
);
562 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED
);
566 /* resume a thread */
567 static int resume_thread( struct thread
*thread
)
569 int old_count
= thread
->suspend
;
570 if (thread
->suspend
> 0)
572 if (!(--thread
->suspend
+ thread
->process
->suspend
)) wake_thread( thread
);
577 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
578 int add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
582 list_add_tail( &obj
->wait_queue
, &entry
->entry
);
586 /* remove a thread from an object wait queue */
587 void remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
589 list_remove( &entry
->entry
);
590 release_object( obj
);
593 struct thread
*get_wait_queue_thread( struct wait_queue_entry
*entry
)
595 return entry
->wait
->thread
;
598 enum select_op
get_wait_queue_select_op( struct wait_queue_entry
*entry
)
600 return entry
->wait
->select
;
603 client_ptr_t
get_wait_queue_key( struct wait_queue_entry
*entry
)
605 return entry
->wait
->key
;
608 void make_wait_abandoned( struct wait_queue_entry
*entry
)
610 entry
->wait
->abandoned
= 1;
614 static unsigned int end_wait( struct thread
*thread
, unsigned int status
)
616 struct thread_wait
*wait
= thread
->wait
;
617 struct wait_queue_entry
*entry
;
621 thread
->wait
= wait
->next
;
623 if (status
< wait
->count
) /* wait satisfied, tell it to the objects */
625 if (wait
->select
== SELECT_WAIT_ALL
)
627 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
628 entry
->obj
->ops
->satisfied( entry
->obj
, entry
);
632 entry
= wait
->queues
+ status
;
633 entry
->obj
->ops
->satisfied( entry
->obj
, entry
);
635 if (wait
->abandoned
) status
+= STATUS_ABANDONED_WAIT_0
;
637 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
638 entry
->obj
->ops
->remove_queue( entry
->obj
, entry
);
639 if (wait
->user
) remove_timeout_user( wait
->user
);
644 /* build the thread wait structure */
645 static int wait_on( const select_op_t
*select_op
, unsigned int count
, struct object
*objects
[],
646 int flags
, timeout_t timeout
)
648 struct thread_wait
*wait
;
649 struct wait_queue_entry
*entry
;
652 if (!(wait
= mem_alloc( FIELD_OFFSET(struct thread_wait
, queues
[count
]) ))) return 0;
653 wait
->next
= current
->wait
;
654 wait
->thread
= current
;
657 wait
->select
= select_op
->op
;
660 wait
->timeout
= timeout
;
662 current
->wait
= wait
;
664 for (i
= 0, entry
= wait
->queues
; i
< count
; i
++, entry
++)
666 struct object
*obj
= objects
[i
];
668 if (!obj
->ops
->add_queue( obj
, entry
))
671 end_wait( current
, get_error() );
678 static int wait_on_handles( const select_op_t
*select_op
, unsigned int count
, const obj_handle_t
*handles
,
679 int flags
, timeout_t timeout
)
681 struct object
*objects
[MAXIMUM_WAIT_OBJECTS
];
685 assert( count
<= MAXIMUM_WAIT_OBJECTS
);
687 for (i
= 0; i
< count
; i
++)
688 if (!(objects
[i
] = get_handle_obj( current
->process
, handles
[i
], SYNCHRONIZE
, NULL
)))
691 if (i
== count
) ret
= wait_on( select_op
, count
, objects
, flags
, timeout
);
693 while (i
> 0) release_object( objects
[--i
] );
697 /* check if the thread waiting condition is satisfied */
698 static int check_wait( struct thread
*thread
)
701 struct thread_wait
*wait
= thread
->wait
;
702 struct wait_queue_entry
*entry
;
706 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && !list_empty( &thread
->system_apc
))
707 return STATUS_USER_APC
;
709 /* Suspended threads may not acquire locks, but they can run system APCs */
710 if (thread
->process
->suspend
+ thread
->suspend
> 0) return -1;
712 if (wait
->select
== SELECT_WAIT_ALL
)
715 /* Note: we must check them all anyway, as some objects may
716 * want to do something when signaled, even if others are not */
717 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
718 not_ok
|= !entry
->obj
->ops
->signaled( entry
->obj
, entry
);
719 if (!not_ok
) return STATUS_WAIT_0
;
723 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
724 if (entry
->obj
->ops
->signaled( entry
->obj
, entry
)) return i
;
727 if ((wait
->flags
& SELECT_ALERTABLE
) && !list_empty(&thread
->user_apc
)) return STATUS_USER_APC
;
728 if (wait
->timeout
<= current_time
) return STATUS_TIMEOUT
;
732 /* send the wakeup signal to a thread */
733 static int send_thread_wakeup( struct thread
*thread
, client_ptr_t cookie
, int signaled
)
735 struct wake_up_reply reply
;
738 memset( &reply
, 0, sizeof(reply
) );
739 reply
.cookie
= cookie
;
740 reply
.signaled
= signaled
;
741 if ((ret
= write( get_unix_fd( thread
->wait_fd
), &reply
, sizeof(reply
) )) == sizeof(reply
))
744 fatal_protocol_error( thread
, "partial wakeup write %d\n", ret
);
745 else if (errno
== EPIPE
)
746 kill_thread( thread
, 0 ); /* normal death */
748 fatal_protocol_error( thread
, "write: %s\n", strerror( errno
));
752 /* attempt to wake up a thread */
753 /* return >0 if OK, 0 if the wait condition is still not satisfied and -1 on error */
754 int wake_thread( struct thread
*thread
)
759 for (count
= 0; thread
->wait
; count
++)
761 if ((signaled
= check_wait( thread
)) == -1) break;
763 cookie
= thread
->wait
->cookie
;
764 signaled
= end_wait( thread
, signaled
);
765 if (debug_level
) fprintf( stderr
, "%04x: *wakeup* signaled=%d\n", thread
->id
, signaled
);
766 if (cookie
&& send_thread_wakeup( thread
, cookie
, signaled
) == -1) /* error */
768 if (!count
) count
= -1;
775 /* attempt to wake up a thread from a wait queue entry, assuming that it is signaled */
776 int wake_thread_queue_entry( struct wait_queue_entry
*entry
)
778 struct thread_wait
*wait
= entry
->wait
;
779 struct thread
*thread
= wait
->thread
;
783 if (thread
->wait
!= wait
) return 0; /* not the current wait */
784 if (thread
->process
->suspend
+ thread
->suspend
> 0) return 0; /* cannot acquire locks */
786 assert( wait
->select
!= SELECT_WAIT_ALL
);
788 cookie
= wait
->cookie
;
789 signaled
= end_wait( thread
, entry
- wait
->queues
);
790 if (debug_level
) fprintf( stderr
, "%04x: *wakeup* signaled=%d\n", thread
->id
, signaled
);
792 if (!cookie
|| send_thread_wakeup( thread
, cookie
, signaled
) != -1)
793 wake_thread( thread
); /* check other waits too */
798 /* thread wait timeout */
799 static void thread_timeout( void *ptr
)
801 struct thread_wait
*wait
= ptr
;
802 struct thread
*thread
= wait
->thread
;
803 client_ptr_t cookie
= wait
->cookie
;
806 if (thread
->wait
!= wait
) return; /* not the top-level wait, ignore it */
807 if (thread
->suspend
+ thread
->process
->suspend
> 0) return; /* suspended, ignore it */
809 if (debug_level
) fprintf( stderr
, "%04x: *wakeup* signaled=TIMEOUT\n", thread
->id
);
810 end_wait( thread
, STATUS_TIMEOUT
);
813 if (send_thread_wakeup( thread
, cookie
, STATUS_TIMEOUT
) == -1) return;
814 /* check if other objects have become signaled in the meantime */
815 wake_thread( thread
);
818 /* try signaling an event flag, a semaphore or a mutex */
819 static int signal_object( obj_handle_t handle
)
824 obj
= get_handle_obj( current
->process
, handle
, 0, NULL
);
827 ret
= obj
->ops
->signal( obj
, get_handle_access( current
->process
, handle
));
828 release_object( obj
);
833 /* select on a list of handles */
834 static timeout_t
select_on( const select_op_t
*select_op
, data_size_t op_size
, client_ptr_t cookie
,
835 int flags
, timeout_t timeout
)
839 struct object
*object
;
841 if (timeout
<= 0) timeout
= current_time
- timeout
;
843 switch (select_op
->op
)
846 if (!wait_on( select_op
, 0, NULL
, flags
, timeout
)) return timeout
;
850 case SELECT_WAIT_ALL
:
851 count
= (op_size
- offsetof( select_op_t
, wait
.handles
)) / sizeof(select_op
->wait
.handles
[0]);
852 if (op_size
< offsetof( select_op_t
, wait
.handles
) || count
> MAXIMUM_WAIT_OBJECTS
)
854 set_error( STATUS_INVALID_PARAMETER
);
857 if (!wait_on_handles( select_op
, count
, select_op
->wait
.handles
, flags
, timeout
))
861 case SELECT_SIGNAL_AND_WAIT
:
862 if (!wait_on_handles( select_op
, 1, &select_op
->signal_and_wait
.wait
, flags
, timeout
))
864 if (select_op
->signal_and_wait
.signal
)
866 if (!signal_object( select_op
->signal_and_wait
.signal
))
868 end_wait( current
, get_error() );
871 /* check if we woke ourselves up */
872 if (!current
->wait
) return timeout
;
876 case SELECT_KEYED_EVENT_WAIT
:
877 case SELECT_KEYED_EVENT_RELEASE
:
878 object
= (struct object
*)get_keyed_event_obj( current
->process
, select_op
->keyed_event
.handle
,
879 select_op
->op
== SELECT_KEYED_EVENT_WAIT
? KEYEDEVENT_WAIT
: KEYEDEVENT_WAKE
);
880 if (!object
) return timeout
;
881 ret
= wait_on( select_op
, 1, &object
, flags
, timeout
);
882 release_object( object
);
883 if (!ret
) return timeout
;
884 current
->wait
->key
= select_op
->keyed_event
.key
;
888 set_error( STATUS_INVALID_PARAMETER
);
892 if ((ret
= check_wait( current
)) != -1)
894 /* condition is already satisfied */
895 set_error( end_wait( current
, ret
));
899 /* now we need to wait */
900 if (current
->wait
->timeout
!= TIMEOUT_INFINITE
)
902 if (!(current
->wait
->user
= add_timeout_user( current
->wait
->timeout
,
903 thread_timeout
, current
->wait
)))
905 end_wait( current
, get_error() );
909 current
->wait
->cookie
= cookie
;
910 set_error( STATUS_PENDING
);
914 /* attempt to wake threads sleeping on the object wait queue */
915 void wake_up( struct object
*obj
, int max
)
920 LIST_FOR_EACH( ptr
, &obj
->wait_queue
)
922 struct wait_queue_entry
*entry
= LIST_ENTRY( ptr
, struct wait_queue_entry
, entry
);
923 if (!(ret
= wake_thread( get_wait_queue_thread( entry
)))) continue;
924 if (ret
> 0 && max
&& !--max
) break;
925 /* restart at the head of the list since a wake up can change the object wait queue */
926 ptr
= &obj
->wait_queue
;
930 /* return the apc queue to use for a given apc type */
931 static inline struct list
*get_apc_queue( struct thread
*thread
, enum apc_type type
)
938 return &thread
->user_apc
;
940 return &thread
->system_apc
;
944 /* check if thread is currently waiting for a (system) apc */
945 static inline int is_in_apc_wait( struct thread
*thread
)
947 return (thread
->process
->suspend
|| thread
->suspend
||
948 (thread
->wait
&& (thread
->wait
->flags
& SELECT_INTERRUPTIBLE
)));
951 /* queue an existing APC to a given thread */
952 static int queue_apc( struct process
*process
, struct thread
*thread
, struct thread_apc
*apc
)
956 if (thread
&& thread
->state
== TERMINATED
&& process
)
959 if (!thread
) /* find a suitable thread inside the process */
961 struct thread
*candidate
;
963 /* first try to find a waiting thread */
964 LIST_FOR_EACH_ENTRY( candidate
, &process
->thread_list
, struct thread
, proc_entry
)
966 if (candidate
->state
== TERMINATED
) continue;
967 if (is_in_apc_wait( candidate
))
975 /* then use the first one that accepts a signal */
976 LIST_FOR_EACH_ENTRY( candidate
, &process
->thread_list
, struct thread
, proc_entry
)
978 if (send_thread_signal( candidate
, SIGUSR1
))
985 if (!thread
) return 0; /* nothing found */
986 queue
= get_apc_queue( thread
, apc
->call
.type
);
990 if (thread
->state
== TERMINATED
) return 0;
991 queue
= get_apc_queue( thread
, apc
->call
.type
);
992 /* send signal for system APCs if needed */
993 if (queue
== &thread
->system_apc
&& list_empty( queue
) && !is_in_apc_wait( thread
))
995 if (!send_thread_signal( thread
, SIGUSR1
)) return 0;
997 /* cancel a possible previous APC with the same owner */
998 if (apc
->owner
) thread_cancel_apc( thread
, apc
->owner
, apc
->call
.type
);
1002 list_add_tail( queue
, &apc
->entry
);
1003 if (!list_prev( queue
, &apc
->entry
)) /* first one */
1004 wake_thread( thread
);
1009 /* queue an async procedure call */
1010 int thread_queue_apc( struct process
*process
, struct thread
*thread
, struct object
*owner
, const apc_call_t
*call_data
)
1012 struct thread_apc
*apc
;
1015 if ((apc
= create_apc( owner
, call_data
)))
1017 ret
= queue_apc( process
, thread
, apc
);
1018 release_object( apc
);
1023 /* cancel the async procedure call owned by a specific object */
1024 void thread_cancel_apc( struct thread
*thread
, struct object
*owner
, enum apc_type type
)
1026 struct thread_apc
*apc
;
1027 struct list
*queue
= get_apc_queue( thread
, type
);
1029 LIST_FOR_EACH_ENTRY( apc
, queue
, struct thread_apc
, entry
)
1031 if (apc
->owner
!= owner
) continue;
1032 list_remove( &apc
->entry
);
1034 wake_up( &apc
->obj
, 0 );
1035 release_object( apc
);
1040 /* remove the head apc from the queue; the returned object must be released by the caller */
1041 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
)
1043 struct thread_apc
*apc
= NULL
;
1044 struct list
*ptr
= list_head( &thread
->system_apc
);
1046 if (!ptr
&& !system_only
) ptr
= list_head( &thread
->user_apc
);
1049 apc
= LIST_ENTRY( ptr
, struct thread_apc
, entry
);
1055 /* clear an APC queue, cancelling all the APCs on it */
1056 static void clear_apc_queue( struct list
*queue
)
1060 while ((ptr
= list_head( queue
)))
1062 struct thread_apc
*apc
= LIST_ENTRY( ptr
, struct thread_apc
, entry
);
1063 list_remove( &apc
->entry
);
1065 wake_up( &apc
->obj
, 0 );
1066 release_object( apc
);
1070 /* add an fd to the inflight list */
1071 /* return list index, or -1 on error */
1072 int thread_add_inflight_fd( struct thread
*thread
, int client
, int server
)
1076 if (server
== -1) return -1;
1083 /* first check if we already have an entry for this fd */
1084 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
1085 if (thread
->inflight
[i
].client
== client
)
1087 close( thread
->inflight
[i
].server
);
1088 thread
->inflight
[i
].server
= server
;
1092 /* now find a free spot to store it */
1093 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
1094 if (thread
->inflight
[i
].client
== -1)
1096 thread
->inflight
[i
].client
= client
;
1097 thread
->inflight
[i
].server
= server
;
1105 /* get an inflight fd and purge it from the list */
1106 /* the fd must be closed when no longer used */
1107 int thread_get_inflight_fd( struct thread
*thread
, int client
)
1111 if (client
== -1) return -1;
1115 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
1117 if (thread
->inflight
[i
].client
== client
)
1119 ret
= thread
->inflight
[i
].server
;
1120 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
1124 } while (!receive_fd( thread
->process
)); /* in case it is still in the socket buffer */
1128 /* kill a thread on the spot */
1129 void kill_thread( struct thread
*thread
, int violent_death
)
1131 if (thread
->state
== TERMINATED
) return; /* already killed */
1132 thread
->state
= TERMINATED
;
1133 thread
->exit_time
= current_time
;
1134 if (current
== thread
) current
= NULL
;
1136 fprintf( stderr
,"%04x: *killed* exit_code=%d\n",
1137 thread
->id
, thread
->exit_code
);
1140 while (thread
->wait
) end_wait( thread
, STATUS_THREAD_IS_TERMINATING
);
1141 send_thread_wakeup( thread
, 0, thread
->exit_code
);
1142 /* if it is waiting on the socket, we don't need to send a SIGQUIT */
1145 kill_console_processes( thread
, 0 );
1146 debug_exit_thread( thread
);
1147 abandon_mutexes( thread
);
1148 wake_up( &thread
->obj
, 0 );
1149 if (violent_death
) send_thread_signal( thread
, SIGQUIT
);
1150 cleanup_thread( thread
);
1151 remove_process_thread( thread
->process
, thread
);
1152 release_object( thread
);
1155 /* copy parts of a context structure */
1156 static void copy_context( context_t
*to
, const context_t
*from
, unsigned int flags
)
1158 assert( to
->cpu
== from
->cpu
);
1160 if (flags
& SERVER_CTX_CONTROL
) to
->ctl
= from
->ctl
;
1161 if (flags
& SERVER_CTX_INTEGER
) to
->integer
= from
->integer
;
1162 if (flags
& SERVER_CTX_SEGMENTS
) to
->seg
= from
->seg
;
1163 if (flags
& SERVER_CTX_FLOATING_POINT
) to
->fp
= from
->fp
;
1164 if (flags
& SERVER_CTX_DEBUG_REGISTERS
) to
->debug
= from
->debug
;
1165 if (flags
& SERVER_CTX_EXTENDED_REGISTERS
) to
->ext
= from
->ext
;
1168 /* return the context flags that correspond to system regs */
1169 /* (system regs are the ones we can't access on the client side) */
1170 static unsigned int get_context_system_regs( enum cpu_type cpu
)
1174 case CPU_x86
: return SERVER_CTX_DEBUG_REGISTERS
;
1175 case CPU_x86_64
: return SERVER_CTX_DEBUG_REGISTERS
;
1176 case CPU_POWERPC
: return 0;
1177 case CPU_ARM
: return SERVER_CTX_DEBUG_REGISTERS
;
1178 case CPU_ARM64
: return SERVER_CTX_DEBUG_REGISTERS
;
1183 /* trigger a breakpoint event in a given thread */
1184 void break_thread( struct thread
*thread
)
1188 assert( thread
->context
);
1190 memset( &data
, 0, sizeof(data
) );
1191 data
.exception
.first
= 1;
1192 data
.exception
.exc_code
= STATUS_BREAKPOINT
;
1193 data
.exception
.flags
= EXCEPTION_CONTINUABLE
;
1194 switch (thread
->context
->cpu
)
1197 data
.exception
.address
= thread
->context
->ctl
.i386_regs
.eip
;
1200 data
.exception
.address
= thread
->context
->ctl
.x86_64_regs
.rip
;
1203 data
.exception
.address
= thread
->context
->ctl
.powerpc_regs
.iar
;
1206 data
.exception
.address
= thread
->context
->ctl
.arm_regs
.pc
;
1209 data
.exception
.address
= thread
->context
->ctl
.arm64_regs
.pc
;
1212 generate_debug_event( thread
, EXCEPTION_DEBUG_EVENT
, &data
);
1213 thread
->debug_break
= 0;
1216 /* take a snapshot of currently running threads */
1217 struct thread_snapshot
*thread_snap( int *count
)
1219 struct thread_snapshot
*snapshot
, *ptr
;
1220 struct thread
*thread
;
1223 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
1224 if (thread
->state
!= TERMINATED
) total
++;
1225 if (!total
|| !(snapshot
= mem_alloc( sizeof(*snapshot
) * total
))) return NULL
;
1227 LIST_FOR_EACH_ENTRY( thread
, &thread_list
, struct thread
, entry
)
1229 if (thread
->state
== TERMINATED
) continue;
1230 ptr
->thread
= thread
;
1231 ptr
->count
= thread
->obj
.refcount
;
1232 ptr
->priority
= thread
->priority
;
1233 grab_object( thread
);
1240 /* gets the current impersonation token */
1241 struct token
*thread_get_impersonation_token( struct thread
*thread
)
1244 return thread
->token
;
1246 return thread
->process
->token
;
1249 /* check if a cpu type can be supported on this server */
1250 int is_cpu_supported( enum cpu_type cpu
)
1252 unsigned int prefix_cpu_mask
= get_prefix_cpu_mask();
1254 if (supported_cpus
& prefix_cpu_mask
& CPU_FLAG(cpu
)) return 1;
1255 if (!(supported_cpus
& prefix_cpu_mask
))
1256 set_error( STATUS_NOT_SUPPORTED
);
1257 else if (supported_cpus
& CPU_FLAG(cpu
))
1258 set_error( STATUS_INVALID_IMAGE_WIN_64
); /* server supports it but not the prefix */
1260 set_error( STATUS_INVALID_IMAGE_FORMAT
);
1264 /* return the cpu mask for supported cpus */
1265 unsigned int get_supported_cpu_mask(void)
1267 return supported_cpus
& get_prefix_cpu_mask();
1270 /* create a new thread */
1271 DECL_HANDLER(new_thread
)
1273 struct thread
*thread
;
1274 struct process
*process
;
1275 struct unicode_str name
;
1276 const struct security_descriptor
*sd
;
1277 const struct object_attributes
*objattr
= get_req_object_attributes( &sd
, &name
, NULL
);
1278 int request_fd
= thread_get_inflight_fd( current
, req
->request_fd
);
1280 if (!(process
= get_process_from_handle( req
->process
, PROCESS_CREATE_THREAD
)))
1282 if (request_fd
!= -1) close( request_fd
);
1286 if (process
!= current
->process
)
1288 if (request_fd
!= -1) /* can't create a request fd in a different process */
1290 close( request_fd
);
1291 set_error( STATUS_INVALID_PARAMETER
);
1294 if (process
->running_threads
) /* only the initial thread can be created in another process */
1296 set_error( STATUS_ACCESS_DENIED
);
1300 else if (request_fd
== -1 || fcntl( request_fd
, F_SETFL
, O_NONBLOCK
) == -1)
1302 if (request_fd
!= -1) close( request_fd
);
1303 set_error( STATUS_INVALID_HANDLE
);
1307 if ((thread
= create_thread( request_fd
, process
, sd
)))
1309 thread
->system_regs
= current
->system_regs
;
1310 if (req
->suspend
) thread
->suspend
++;
1311 reply
->tid
= get_thread_id( thread
);
1312 if ((reply
->handle
= alloc_handle_no_access_check( current
->process
, thread
,
1313 req
->access
, objattr
->attributes
)))
1315 /* thread object will be released when the thread gets killed */
1318 kill_thread( thread
, 1 );
1321 release_object( process
);
1324 /* initialize a new thread */
1325 DECL_HANDLER(init_thread
)
1327 struct process
*process
= current
->process
;
1328 int wait_fd
, reply_fd
;
1330 if ((reply_fd
= thread_get_inflight_fd( current
, req
->reply_fd
)) == -1)
1332 set_error( STATUS_TOO_MANY_OPENED_FILES
);
1335 if ((wait_fd
= thread_get_inflight_fd( current
, req
->wait_fd
)) == -1)
1337 set_error( STATUS_TOO_MANY_OPENED_FILES
);
1341 if (current
->reply_fd
) /* already initialised */
1343 set_error( STATUS_INVALID_PARAMETER
);
1347 if (fcntl( reply_fd
, F_SETFL
, O_NONBLOCK
) == -1) goto error
;
1349 current
->reply_fd
= create_anonymous_fd( &thread_fd_ops
, reply_fd
, ¤t
->obj
, 0 );
1350 current
->wait_fd
= create_anonymous_fd( &thread_fd_ops
, wait_fd
, ¤t
->obj
, 0 );
1351 if (!current
->reply_fd
|| !current
->wait_fd
) return;
1353 if (!is_valid_address(req
->teb
))
1355 set_error( STATUS_INVALID_PARAMETER
);
1359 current
->unix_pid
= req
->unix_pid
;
1360 current
->unix_tid
= req
->unix_tid
;
1361 current
->teb
= req
->teb
;
1362 current
->entry_point
= process
->peb
? req
->entry
: 0;
1364 if (!process
->peb
) /* first thread, initialize the process too */
1366 if (!is_cpu_supported( req
->cpu
)) return;
1367 process
->unix_pid
= current
->unix_pid
;
1368 process
->peb
= req
->entry
;
1369 process
->cpu
= req
->cpu
;
1370 reply
->info_size
= init_process( current
);
1371 if (!process
->parent_id
)
1372 process
->affinity
= current
->affinity
= get_thread_affinity( current
);
1374 set_thread_affinity( current
, current
->affinity
);
1378 if (req
->cpu
!= process
->cpu
)
1380 set_error( STATUS_INVALID_PARAMETER
);
1383 if (process
->unix_pid
!= current
->unix_pid
)
1384 process
->unix_pid
= -1; /* can happen with linuxthreads */
1385 init_thread_context( current
);
1386 generate_debug_event( current
, CREATE_THREAD_DEBUG_EVENT
, &req
->entry
);
1387 set_thread_affinity( current
, current
->affinity
);
1389 debug_level
= max( debug_level
, req
->debug_level
);
1391 reply
->pid
= get_process_id( process
);
1392 reply
->tid
= get_thread_id( current
);
1393 reply
->version
= SERVER_PROTOCOL_VERSION
;
1394 reply
->server_start
= server_start_time
;
1395 reply
->all_cpus
= supported_cpus
& get_prefix_cpu_mask();
1396 reply
->suspend
= (current
->suspend
|| process
->suspend
);
1400 if (reply_fd
!= -1) close( reply_fd
);
1401 if (wait_fd
!= -1) close( wait_fd
);
1404 /* terminate a thread */
1405 DECL_HANDLER(terminate_thread
)
1407 struct thread
*thread
;
1411 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_TERMINATE
)))
1413 thread
->exit_code
= req
->exit_code
;
1414 if (thread
!= current
) kill_thread( thread
, 1 );
1418 reply
->last
= (thread
->process
->running_threads
== 1);
1420 release_object( thread
);
1424 /* open a handle to a thread */
1425 DECL_HANDLER(open_thread
)
1427 struct thread
*thread
= get_thread_from_id( req
->tid
);
1432 reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->attributes
);
1433 release_object( thread
);
1437 /* fetch information about a thread */
1438 DECL_HANDLER(get_thread_info
)
1440 struct thread
*thread
;
1441 obj_handle_t handle
= req
->handle
;
1443 if (!handle
) thread
= get_thread_from_id( req
->tid_in
);
1444 else thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_LIMITED_INFORMATION
);
1448 reply
->pid
= get_process_id( thread
->process
);
1449 reply
->tid
= get_thread_id( thread
);
1450 reply
->teb
= thread
->teb
;
1451 reply
->entry_point
= thread
->entry_point
;
1452 reply
->exit_code
= (thread
->state
== TERMINATED
) ? thread
->exit_code
: STATUS_PENDING
;
1453 reply
->priority
= thread
->priority
;
1454 reply
->affinity
= thread
->affinity
;
1455 reply
->last
= thread
->process
->running_threads
== 1;
1457 release_object( thread
);
1461 /* fetch information about thread times */
1462 DECL_HANDLER(get_thread_times
)
1464 struct thread
*thread
;
1466 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
1468 reply
->creation_time
= thread
->creation_time
;
1469 reply
->exit_time
= thread
->exit_time
;
1471 release_object( thread
);
1475 /* set information about a thread */
1476 DECL_HANDLER(set_thread_info
)
1478 struct thread
*thread
;
1480 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_INFORMATION
)))
1482 set_thread_info( thread
, req
);
1483 release_object( thread
);
1487 /* suspend a thread */
1488 DECL_HANDLER(suspend_thread
)
1490 struct thread
*thread
;
1492 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
1494 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
1495 else reply
->count
= suspend_thread( thread
);
1496 release_object( thread
);
1500 /* resume a thread */
1501 DECL_HANDLER(resume_thread
)
1503 struct thread
*thread
;
1505 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
1507 reply
->count
= resume_thread( thread
);
1508 release_object( thread
);
1512 /* select on a handle list */
1513 DECL_HANDLER(select
)
1515 select_op_t select_op
;
1516 data_size_t op_size
;
1517 struct thread_apc
*apc
;
1518 const apc_result_t
*result
= get_req_data();
1520 if (get_req_data_size() < sizeof(*result
))
1522 set_error( STATUS_INVALID_PARAMETER
);
1527 set_error( STATUS_INVALID_PARAMETER
);
1531 op_size
= min( get_req_data_size() - sizeof(*result
), sizeof(select_op
) );
1532 memset( &select_op
, 0, sizeof(select_op
) );
1533 memcpy( &select_op
, result
+ 1, op_size
);
1535 /* first store results of previous apc */
1538 if (!(apc
= (struct thread_apc
*)get_handle_obj( current
->process
, req
->prev_apc
,
1539 0, &thread_apc_ops
))) return;
1540 apc
->result
= *result
;
1542 if (apc
->result
.type
== APC_CREATE_THREAD
) /* transfer the handle to the caller process */
1544 obj_handle_t handle
= duplicate_handle( current
->process
, apc
->result
.create_thread
.handle
,
1545 apc
->caller
->process
, 0, 0, DUP_HANDLE_SAME_ACCESS
);
1546 close_handle( current
->process
, apc
->result
.create_thread
.handle
);
1547 apc
->result
.create_thread
.handle
= handle
;
1548 clear_error(); /* ignore errors from the above calls */
1550 else if (apc
->result
.type
== APC_ASYNC_IO
)
1553 async_set_result( apc
->owner
, apc
->result
.async_io
.status
, apc
->result
.async_io
.total
);
1555 wake_up( &apc
->obj
, 0 );
1556 close_handle( current
->process
, req
->prev_apc
);
1557 release_object( apc
);
1560 reply
->timeout
= select_on( &select_op
, op_size
, req
->cookie
, req
->flags
, req
->timeout
);
1562 if (get_error() == STATUS_USER_APC
)
1566 if (!(apc
= thread_dequeue_apc( current
, !(req
->flags
& SELECT_ALERTABLE
) )))
1568 /* Optimization: ignore APC_NONE calls, they are only used to
1569 * wake up a thread, but since we got here the thread woke up already.
1571 if (apc
->call
.type
!= APC_NONE
&&
1572 (reply
->apc_handle
= alloc_handle( current
->process
, apc
, SYNCHRONIZE
, 0 )))
1574 reply
->call
= apc
->call
;
1575 release_object( apc
);
1579 wake_up( &apc
->obj
, 0 );
1580 release_object( apc
);
1585 /* queue an APC for a thread or process */
1586 DECL_HANDLER(queue_apc
)
1588 struct thread
*thread
= NULL
;
1589 struct process
*process
= NULL
;
1590 struct thread_apc
*apc
;
1592 if (!(apc
= create_apc( NULL
, &req
->call
))) return;
1594 switch (apc
->call
.type
)
1598 thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
);
1600 case APC_VIRTUAL_ALLOC
:
1601 case APC_VIRTUAL_FREE
:
1602 case APC_VIRTUAL_PROTECT
:
1603 case APC_VIRTUAL_FLUSH
:
1604 case APC_VIRTUAL_LOCK
:
1605 case APC_VIRTUAL_UNLOCK
:
1606 case APC_UNMAP_VIEW
:
1607 process
= get_process_from_handle( req
->handle
, PROCESS_VM_OPERATION
);
1609 case APC_VIRTUAL_QUERY
:
1610 process
= get_process_from_handle( req
->handle
, PROCESS_QUERY_INFORMATION
);
1613 process
= get_process_from_handle( req
->handle
, PROCESS_VM_OPERATION
);
1614 if (process
&& process
!= current
->process
)
1616 /* duplicate the handle into the target process */
1617 obj_handle_t handle
= duplicate_handle( current
->process
, apc
->call
.map_view
.handle
,
1618 process
, 0, 0, DUP_HANDLE_SAME_ACCESS
);
1619 if (handle
) apc
->call
.map_view
.handle
= handle
;
1622 release_object( process
);
1627 case APC_CREATE_THREAD
:
1628 process
= get_process_from_handle( req
->handle
, PROCESS_CREATE_THREAD
);
1631 set_error( STATUS_INVALID_PARAMETER
);
1637 if (!queue_apc( NULL
, thread
, apc
)) set_error( STATUS_THREAD_IS_TERMINATING
);
1638 release_object( thread
);
1642 reply
->self
= (process
== current
->process
);
1645 obj_handle_t handle
= alloc_handle( current
->process
, apc
, SYNCHRONIZE
, 0 );
1648 if (queue_apc( process
, NULL
, apc
))
1650 apc
->caller
= (struct thread
*)grab_object( current
);
1651 reply
->handle
= handle
;
1655 close_handle( current
->process
, handle
);
1656 set_error( STATUS_PROCESS_IS_TERMINATING
);
1660 release_object( process
);
1663 release_object( apc
);
1666 /* Get the result of an APC call */
1667 DECL_HANDLER(get_apc_result
)
1669 struct thread_apc
*apc
;
1671 if (!(apc
= (struct thread_apc
*)get_handle_obj( current
->process
, req
->handle
,
1672 0, &thread_apc_ops
))) return;
1674 if (apc
->executed
) reply
->result
= apc
->result
;
1675 else set_error( STATUS_PENDING
);
1677 /* close the handle directly to avoid an extra round-trip */
1678 close_handle( current
->process
, req
->handle
);
1679 release_object( apc
);
1682 /* retrieve the current context of a thread */
1683 DECL_HANDLER(get_thread_context
)
1685 struct thread
*thread
;
1688 if (get_reply_max_size() < sizeof(context_t
))
1690 set_error( STATUS_INVALID_PARAMETER
);
1693 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_GET_CONTEXT
))) return;
1694 reply
->self
= (thread
== current
);
1696 if (thread
!= current
&& !thread
->context
)
1698 /* thread is not suspended, retry (if it's still running) */
1699 if (thread
->state
== RUNNING
)
1701 set_error( STATUS_PENDING
);
1704 release_object( thread
);
1705 /* make sure we have suspend access */
1706 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
))) return;
1707 suspend_thread( thread
);
1710 else set_error( STATUS_UNSUCCESSFUL
);
1712 else if ((context
= set_reply_data_size( sizeof(context_t
) )))
1714 unsigned int flags
= get_context_system_regs( thread
->process
->cpu
);
1716 memset( context
, 0, sizeof(context_t
) );
1717 context
->cpu
= thread
->process
->cpu
;
1718 if (thread
->context
) copy_context( context
, thread
->context
, req
->flags
& ~flags
);
1719 if (req
->flags
& flags
) get_thread_context( thread
, context
, req
->flags
& flags
);
1721 release_object( thread
);
1724 /* set the current context of a thread */
1725 DECL_HANDLER(set_thread_context
)
1727 struct thread
*thread
;
1728 const context_t
*context
= get_req_data();
1730 if (get_req_data_size() < sizeof(context_t
))
1732 set_error( STATUS_INVALID_PARAMETER
);
1735 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
))) return;
1736 reply
->self
= (thread
== current
);
1738 if (thread
!= current
&& !thread
->context
)
1740 /* thread is not suspended, retry (if it's still running) */
1741 if (thread
->state
== RUNNING
)
1743 set_error( STATUS_PENDING
);
1746 release_object( thread
);
1747 /* make sure we have suspend access */
1748 if (!(thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
))) return;
1749 suspend_thread( thread
);
1752 else set_error( STATUS_UNSUCCESSFUL
);
1754 else if (context
->cpu
== thread
->process
->cpu
)
1756 unsigned int system_flags
= get_context_system_regs(context
->cpu
) & context
->flags
;
1757 unsigned int client_flags
= context
->flags
& ~system_flags
;
1759 if (system_flags
) set_thread_context( thread
, context
, system_flags
);
1760 if (thread
->context
&& !get_error()) copy_context( thread
->context
, context
, client_flags
);
1762 else set_error( STATUS_INVALID_PARAMETER
);
1764 release_object( thread
);
1767 /* retrieve the suspended context of a thread */
1768 DECL_HANDLER(get_suspend_context
)
1770 if (get_reply_max_size() < sizeof(context_t
))
1772 set_error( STATUS_INVALID_PARAMETER
);
1776 if (current
->suspend_context
)
1778 if (current
->suspend_context
->flags
)
1779 set_reply_data_ptr( current
->suspend_context
, sizeof(context_t
) );
1781 free( current
->suspend_context
);
1782 if (current
->context
== current
->suspend_context
)
1784 current
->context
= NULL
;
1785 stop_thread_if_suspended( current
);
1787 current
->suspend_context
= NULL
;
1789 else set_error( STATUS_INVALID_PARAMETER
); /* not suspended, shouldn't happen */
1792 /* store the suspended context of a thread */
1793 DECL_HANDLER(set_suspend_context
)
1795 const context_t
*context
= get_req_data();
1797 if (get_req_data_size() < sizeof(context_t
))
1799 set_error( STATUS_INVALID_PARAMETER
);
1803 if (current
->context
|| context
->cpu
!= current
->process
->cpu
)
1805 /* nested suspend or exception, shouldn't happen */
1806 set_error( STATUS_INVALID_PARAMETER
);
1808 else if ((current
->suspend_context
= mem_alloc( sizeof(context_t
) )))
1810 memcpy( current
->suspend_context
, get_req_data(), sizeof(context_t
) );
1811 current
->suspend_context
->flags
= 0; /* to keep track of what is modified */
1812 current
->context
= current
->suspend_context
;
1813 if (current
->debug_break
) break_thread( current
);
1817 /* fetch a selector entry for a thread */
1818 DECL_HANDLER(get_selector_entry
)
1820 struct thread
*thread
;
1821 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
1823 get_selector_entry( thread
, req
->entry
, &reply
->base
, &reply
->limit
, &reply
->flags
);
1824 release_object( thread
);