2 * Server-side process management
4 * Copyright (C) 1998 Alexandre Julliard
25 /* process structure */
27 static struct process initial_process
;
28 static struct process
*first_process
= &initial_process
;
29 static int running_processes
;
31 /* process operations */
33 static void process_dump( struct object
*obj
, int verbose
);
34 static int process_signaled( struct object
*obj
, struct thread
*thread
);
35 static void process_destroy( struct object
*obj
);
37 static const struct object_ops process_ops
=
52 /* initialization of a process structure */
53 static void init_process( struct process
*process
)
55 init_object( &process
->obj
, &process_ops
, NULL
);
58 process
->thread_list
= NULL
;
59 process
->debug_next
= NULL
;
60 process
->debug_prev
= NULL
;
61 process
->debugger
= NULL
;
62 process
->exit_code
= 0x103; /* STILL_ACTIVE */
63 process
->running_threads
= 0;
64 process
->priority
= NORMAL_PRIORITY_CLASS
;
65 process
->affinity
= 1;
67 process
->console_in
= NULL
;
68 process
->console_out
= NULL
;
70 gettimeofday( &process
->start_time
, NULL
);
71 /* alloc a handle for the process itself */
72 alloc_handle( process
, process
, PROCESS_ALL_ACCESS
, 0 );
75 /* create the initial process */
76 struct process
*create_initial_process(void)
78 struct new_process_request
*info
;
80 copy_handle_table( &initial_process
, NULL
);
81 init_process( &initial_process
);
83 if (!alloc_console( &initial_process
)) return NULL
;
84 if (!(info
= mem_alloc( sizeof(*info
) ))) return NULL
;
85 info
->start_flags
= STARTF_USESTDHANDLES
;
86 info
->hstdin
= alloc_handle( &initial_process
, initial_process
.console_in
,
87 GENERIC_READ
| GENERIC_WRITE
| SYNCHRONIZE
, 1 );
88 info
->hstdout
= alloc_handle( &initial_process
, initial_process
.console_out
,
89 GENERIC_READ
| GENERIC_WRITE
| SYNCHRONIZE
, 1 );
90 info
->hstderr
= alloc_handle( &initial_process
, initial_process
.console_out
,
91 GENERIC_READ
| GENERIC_WRITE
| SYNCHRONIZE
, 1 );
93 initial_process
.info
= info
;
94 grab_object( &initial_process
); /* so that we never free it */
95 return &initial_process
;
99 /* create a new process */
100 static struct process
*create_process( struct new_process_request
*req
)
102 struct process
*process
= NULL
;
103 struct process
*parent
= current
->process
;
105 if (!(process
= mem_alloc( sizeof(*process
) ))) return NULL
;
106 if (!copy_handle_table( process
, req
->inherit_all
? parent
: NULL
))
111 init_process( process
);
112 if (parent
->console_in
) process
->console_in
= grab_object( parent
->console_in
);
113 if (parent
->console_out
) process
->console_out
= grab_object( parent
->console_out
);
115 if (!(process
->info
= mem_alloc( sizeof(*process
->info
) ))) goto error
;
116 memcpy( process
->info
, req
, sizeof(*req
) );
118 if (!req
->inherit_all
&& !(req
->start_flags
& STARTF_USESTDHANDLES
))
120 process
->info
->hstdin
= duplicate_handle( parent
, req
->hstdin
, process
,
121 0, TRUE
, DUPLICATE_SAME_ACCESS
);
122 process
->info
->hstdout
= duplicate_handle( parent
, req
->hstdout
, process
,
123 0, TRUE
, DUPLICATE_SAME_ACCESS
);
124 process
->info
->hstderr
= duplicate_handle( parent
, req
->hstderr
, process
,
125 0, TRUE
, DUPLICATE_SAME_ACCESS
);
128 process
->next
= first_process
;
129 first_process
->prev
= process
;
130 first_process
= process
;
134 release_object( process
);
138 /* destroy a process when its refcount is 0 */
139 static void process_destroy( struct object
*obj
)
141 struct process
*process
= (struct process
*)obj
;
142 assert( obj
->ops
== &process_ops
);
143 assert( process
!= &initial_process
);
145 /* we can't have a thread remaining */
146 assert( !process
->thread_list
);
147 if (process
->next
) process
->next
->prev
= process
->prev
;
148 if (process
->prev
) process
->prev
->next
= process
->next
;
149 else first_process
= process
->next
;
150 free_console( process
);
151 free_handles( process
);
152 if (process
->info
) free( process
->info
);
153 if (debug_level
) memset( process
, 0xbb, sizeof(process
) ); /* catch errors */
157 /* dump a process on stdout for debugging purposes */
158 static void process_dump( struct object
*obj
, int verbose
)
160 struct process
*process
= (struct process
*)obj
;
161 assert( obj
->ops
== &process_ops
);
163 printf( "Process next=%p prev=%p\n", process
->next
, process
->prev
);
166 static int process_signaled( struct object
*obj
, struct thread
*thread
)
168 struct process
*process
= (struct process
*)obj
;
169 return !process
->running_threads
;
173 /* get a process from an id (and increment the refcount) */
174 struct process
*get_process_from_id( void *id
)
176 struct process
*p
= first_process
;
177 while (p
&& (p
!= id
)) p
= p
->next
;
178 if (p
) grab_object( p
);
179 else SET_ERROR( ERROR_INVALID_PARAMETER
);
183 /* get a process from a handle (and increment the refcount) */
184 struct process
*get_process_from_handle( int handle
, unsigned int access
)
186 return (struct process
*)get_handle_obj( current
->process
, handle
,
187 access
, &process_ops
);
190 /* retrieve the initialization info for a new process */
191 static int get_process_init_info( struct process
*process
, struct init_process_reply
*reply
)
193 struct new_process_request
*info
;
194 if (!(info
= process
->info
)) return 0;
195 process
->info
= NULL
;
196 reply
->start_flags
= info
->start_flags
;
197 reply
->hstdin
= info
->hstdin
;
198 reply
->hstdout
= info
->hstdout
;
199 reply
->hstderr
= info
->hstderr
;
200 reply
->env_ptr
= info
->env_ptr
;
205 /* a process has been killed (i.e. its last thread died) */
206 static void process_killed( struct process
*process
, int exit_code
)
208 assert( !process
->thread_list
);
209 process
->exit_code
= exit_code
;
210 gettimeofday( &process
->end_time
, NULL
);
211 wake_up( &process
->obj
, 0 );
212 free_handles( process
);
215 /* add a thread to a process running threads list */
216 void add_process_thread( struct process
*process
, struct thread
*thread
)
218 thread
->proc_next
= process
->thread_list
;
219 thread
->proc_prev
= NULL
;
220 if (thread
->proc_next
) thread
->proc_next
->proc_prev
= thread
;
221 process
->thread_list
= thread
;
222 if (!process
->running_threads
++) running_processes
++;
223 grab_object( thread
);
226 /* remove a thread from a process running threads list */
227 void remove_process_thread( struct process
*process
, struct thread
*thread
)
229 assert( process
->running_threads
> 0 );
230 assert( process
->thread_list
);
232 if (thread
->proc_next
) thread
->proc_next
->proc_prev
= thread
->proc_prev
;
233 if (thread
->proc_prev
) thread
->proc_prev
->proc_next
= thread
->proc_next
;
234 else process
->thread_list
= thread
->proc_next
;
236 if (!--process
->running_threads
)
238 /* we have removed the last running thread, exit the process */
240 process_killed( process
, thread
->exit_code
);
242 release_object( thread
);
245 /* suspend all the threads of a process */
246 void suspend_process( struct process
*process
)
248 if (!process
->suspend
++)
250 struct thread
*thread
= process
->thread_list
;
251 for (; thread
; thread
= thread
->proc_next
)
253 if (!thread
->suspend
&& thread
->unix_pid
)
254 kill( thread
->unix_pid
, SIGSTOP
);
259 /* resume all the threads of a process */
260 void resume_process( struct process
*process
)
262 assert (process
->suspend
> 0);
263 if (!--process
->suspend
)
265 struct thread
*thread
= process
->thread_list
;
266 for (; thread
; thread
= thread
->proc_next
)
268 if (!thread
->suspend
&& thread
->unix_pid
)
269 kill( thread
->unix_pid
, SIGCONT
);
274 /* kill a process on the spot */
275 void kill_process( struct process
*process
, int exit_code
)
277 while (process
->thread_list
)
278 kill_thread( process
->thread_list
, exit_code
);
281 /* get all information about a process */
282 static void get_process_info( struct process
*process
,
283 struct get_process_info_reply
*reply
)
285 reply
->pid
= process
;
286 reply
->exit_code
= process
->exit_code
;
287 reply
->priority
= process
->priority
;
288 reply
->process_affinity
= process
->affinity
;
289 reply
->system_affinity
= 1;
292 /* set all information about a process */
293 static void set_process_info( struct process
*process
,
294 struct set_process_info_request
*req
)
296 if (req
->mask
& SET_PROCESS_INFO_PRIORITY
)
297 process
->priority
= req
->priority
;
298 if (req
->mask
& SET_PROCESS_INFO_AFFINITY
)
300 if (req
->affinity
!= 1) SET_ERROR( ERROR_INVALID_PARAMETER
);
301 else process
->affinity
= req
->affinity
;
305 /* allocate a console for this process */
306 int alloc_console( struct process
*process
)
308 struct object
*obj
[2];
309 if (process
->console_in
|| process
->console_out
)
311 SET_ERROR( ERROR_ACCESS_DENIED
);
314 if (!create_console( -1, obj
)) return 0;
315 process
->console_in
= obj
[0];
316 process
->console_out
= obj
[1];
320 /* free the console for this process */
321 int free_console( struct process
*process
)
323 if (process
->console_in
) release_object( process
->console_in
);
324 if (process
->console_out
) release_object( process
->console_out
);
325 process
->console_in
= process
->console_out
= NULL
;
329 /* get the process console */
330 struct object
*get_console( struct process
*process
, int output
)
333 if (!(obj
= output
? process
->console_out
: process
->console_in
))
335 return grab_object( obj
);
338 /* take a snapshot of currently running processes */
339 struct process_snapshot
*process_snap( int *count
)
341 struct process_snapshot
*snapshot
, *ptr
;
342 struct process
*process
;
343 if (!running_processes
) return NULL
;
344 if (!(snapshot
= mem_alloc( sizeof(*snapshot
) * running_processes
)))
347 for (process
= first_process
; process
; process
= process
->next
)
349 if (!process
->running_threads
) continue;
350 ptr
->process
= process
;
351 ptr
->threads
= process
->running_threads
;
352 ptr
->priority
= process
->priority
;
353 grab_object( process
);
356 *count
= running_processes
;
360 /* create a new process */
361 DECL_HANDLER(new_process
)
363 struct new_process_reply reply
;
364 struct process
*process
;
366 if ((process
= create_process( req
)))
369 reply
.handle
= alloc_handle( current
->process
, process
,
370 PROCESS_ALL_ACCESS
, req
->inherit
);
371 release_object( process
);
378 send_reply( current
, -1, 1, &reply
, sizeof(reply
) );
381 /* initialize a new process */
382 DECL_HANDLER(init_process
)
384 struct init_process_reply reply
;
385 if (current
->state
!= RUNNING
)
387 fatal_protocol_error( "init_process: init_thread not called yet\n" );
390 if (!get_process_init_info( current
->process
, &reply
))
392 fatal_protocol_error( "init_process: called twice\n" );
395 send_reply( current
, -1, 1, &reply
, sizeof(reply
) );
398 /* open a handle to a process */
399 DECL_HANDLER(open_process
)
401 struct open_process_reply reply
= { -1 };
402 struct process
*process
= get_process_from_id( req
->pid
);
405 reply
.handle
= alloc_handle( current
->process
, process
,
406 req
->access
, req
->inherit
);
407 release_object( process
);
409 send_reply( current
, -1, 1, &reply
, sizeof(reply
) );
412 /* terminate a process */
413 DECL_HANDLER(terminate_process
)
415 struct process
*process
;
417 if ((process
= get_process_from_handle( req
->handle
, PROCESS_TERMINATE
)))
419 kill_process( process
, req
->exit_code
);
420 release_object( process
);
422 if (current
) send_reply( current
, -1, 0 );
425 /* fetch information about a process */
426 DECL_HANDLER(get_process_info
)
428 struct process
*process
;
429 struct get_process_info_reply reply
= { 0, 0, 0 };
431 if ((process
= get_process_from_handle( req
->handle
, PROCESS_QUERY_INFORMATION
)))
433 get_process_info( process
, &reply
);
434 release_object( process
);
436 send_reply( current
, -1, 1, &reply
, sizeof(reply
) );
439 /* set information about a process */
440 DECL_HANDLER(set_process_info
)
442 struct process
*process
;
444 if ((process
= get_process_from_handle( req
->handle
, PROCESS_SET_INFORMATION
)))
446 set_process_info( process
, req
);
447 release_object( process
);
449 send_reply( current
, -1, 0 );