2 * Server-side process management
4 * Copyright (C) 1998 Alexandre Julliard
25 /* process structure */
27 static struct process
*first_process
;
28 static int running_processes
;
30 /* process operations */
32 static void process_dump( struct object
*obj
, int verbose
);
33 static int process_signaled( struct object
*obj
, struct thread
*thread
);
34 static void process_destroy( struct object
*obj
);
36 static const struct object_ops process_ops
=
38 sizeof(struct process
),
52 /* create a new process */
53 static struct process
*create_process( struct process
*parent
, struct new_process_request
*req
,
54 const char *cmd_line
, size_t len
)
56 struct process
*process
;
58 if (!(process
= alloc_object( &process_ops
))) return NULL
;
61 process
->thread_list
= NULL
;
62 process
->debug_next
= NULL
;
63 process
->debug_prev
= NULL
;
64 process
->debugger
= NULL
;
65 process
->handles
= NULL
;
66 process
->exit_code
= 0x103; /* STILL_ACTIVE */
67 process
->running_threads
= 0;
68 process
->priority
= NORMAL_PRIORITY_CLASS
;
69 process
->affinity
= 1;
71 process
->console_in
= NULL
;
72 process
->console_out
= NULL
;
74 gettimeofday( &process
->start_time
, NULL
);
77 process
->handles
= copy_handle_table( process
, parent
);
79 process
->handles
= alloc_handle_table( process
, 0 );
80 if (!process
->handles
) goto error
;
82 /* alloc a handle for the process itself */
83 alloc_handle( process
, process
, PROCESS_ALL_ACCESS
, 0 );
85 if (!(process
->info
= mem_alloc( sizeof(*process
->info
) + len
))) goto error
;
86 memcpy( process
->info
, req
, sizeof(*req
) );
87 memcpy( process
->info
->cmdline
, cmd_line
, len
);
88 process
->info
->cmdline
[len
] = 0;
90 /* set the process console */
91 if (req
->create_flags
& CREATE_NEW_CONSOLE
)
93 if (!alloc_console( process
)) goto error
;
95 else if (!(req
->create_flags
& DETACHED_PROCESS
))
97 if (parent
->console_in
) process
->console_in
= grab_object( parent
->console_in
);
98 if (parent
->console_out
) process
->console_out
= grab_object( parent
->console_out
);
101 if (!req
->inherit_all
&& !(req
->start_flags
& STARTF_USESTDHANDLES
))
103 process
->info
->hstdin
= duplicate_handle( parent
, req
->hstdin
, process
,
104 0, TRUE
, DUPLICATE_SAME_ACCESS
);
105 process
->info
->hstdout
= duplicate_handle( parent
, req
->hstdout
, process
,
106 0, TRUE
, DUPLICATE_SAME_ACCESS
);
107 process
->info
->hstderr
= duplicate_handle( parent
, req
->hstderr
, process
,
108 0, TRUE
, DUPLICATE_SAME_ACCESS
);
111 /* attach to the debugger if requested */
112 if (req
->create_flags
& DEBUG_PROCESS
)
113 debugger_attach( process
, current
);
114 else if (parent
&& parent
->debugger
&& !(req
->create_flags
& DEBUG_ONLY_THIS_PROCESS
))
115 debugger_attach( process
, parent
->debugger
);
117 if ((process
->next
= first_process
) != NULL
) process
->next
->prev
= process
;
118 first_process
= process
;
122 free_console( process
);
123 if (process
->info
) free( process
->info
);
124 if (process
->handles
) release_object( process
->handles
);
125 release_object( process
);
129 /* create the initial process */
130 struct process
*create_initial_process(void)
132 struct process
*process
;
133 struct new_process_request req
;
137 req
.create_flags
= CREATE_NEW_CONSOLE
;
138 req
.start_flags
= STARTF_USESTDHANDLES
;
144 if ((process
= create_process( NULL
, &req
, "", 1 )))
146 process
->info
->hstdin
= alloc_handle( process
, process
->console_in
,
147 GENERIC_READ
| GENERIC_WRITE
| SYNCHRONIZE
, 1 );
148 process
->info
->hstdout
= alloc_handle( process
, process
->console_out
,
149 GENERIC_READ
| GENERIC_WRITE
| SYNCHRONIZE
, 1 );
150 process
->info
->hstderr
= alloc_handle( process
, process
->console_out
,
151 GENERIC_READ
| GENERIC_WRITE
| SYNCHRONIZE
, 1 );
156 /* destroy a process when its refcount is 0 */
157 static void process_destroy( struct object
*obj
)
159 struct process
*process
= (struct process
*)obj
;
160 assert( obj
->ops
== &process_ops
);
162 /* we can't have a thread remaining */
163 assert( !process
->thread_list
);
164 if (process
->next
) process
->next
->prev
= process
->prev
;
165 if (process
->prev
) process
->prev
->next
= process
->next
;
166 else first_process
= process
->next
;
167 if (process
->info
) free( process
->info
);
170 /* dump a process on stdout for debugging purposes */
171 static void process_dump( struct object
*obj
, int verbose
)
173 struct process
*process
= (struct process
*)obj
;
174 assert( obj
->ops
== &process_ops
);
176 fprintf( stderr
, "Process next=%p prev=%p console=%p/%p handles=%p\n",
177 process
->next
, process
->prev
, process
->console_in
, process
->console_out
,
181 static int process_signaled( struct object
*obj
, struct thread
*thread
)
183 struct process
*process
= (struct process
*)obj
;
184 return !process
->running_threads
;
188 /* get a process from an id (and increment the refcount) */
189 struct process
*get_process_from_id( void *id
)
191 struct process
*p
= first_process
;
192 while (p
&& (p
!= id
)) p
= p
->next
;
193 if (p
) grab_object( p
);
194 else set_error( ERROR_INVALID_PARAMETER
);
198 /* get a process from a handle (and increment the refcount) */
199 struct process
*get_process_from_handle( int handle
, unsigned int access
)
201 return (struct process
*)get_handle_obj( current
->process
, handle
,
202 access
, &process_ops
);
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 release_object( process
->handles
);
212 process
->handles
= NULL
;
213 free_console( process
);
214 wake_up( &process
->obj
, 0 );
215 if (!--running_processes
)
217 /* last process died, close global handles */
218 close_global_handles();
222 /* add a thread to a process running threads list */
223 void add_process_thread( struct process
*process
, struct thread
*thread
)
225 thread
->proc_next
= process
->thread_list
;
226 thread
->proc_prev
= NULL
;
227 if (thread
->proc_next
) thread
->proc_next
->proc_prev
= thread
;
228 process
->thread_list
= thread
;
229 if (!process
->running_threads
++) running_processes
++;
230 grab_object( thread
);
233 /* remove a thread from a process running threads list */
234 void remove_process_thread( struct process
*process
, struct thread
*thread
)
236 assert( process
->running_threads
> 0 );
237 assert( process
->thread_list
);
239 if (thread
->proc_next
) thread
->proc_next
->proc_prev
= thread
->proc_prev
;
240 if (thread
->proc_prev
) thread
->proc_prev
->proc_next
= thread
->proc_next
;
241 else process
->thread_list
= thread
->proc_next
;
243 if (!--process
->running_threads
)
245 /* we have removed the last running thread, exit the process */
246 process_killed( process
, thread
->exit_code
);
248 release_object( thread
);
251 /* suspend all the threads of a process */
252 void suspend_process( struct process
*process
)
254 if (!process
->suspend
++)
256 struct thread
*thread
= process
->thread_list
;
257 for (; thread
; thread
= thread
->proc_next
)
259 if (!thread
->suspend
&& thread
->unix_pid
)
260 kill( thread
->unix_pid
, SIGSTOP
);
265 /* resume all the threads of a process */
266 void resume_process( struct process
*process
)
268 assert (process
->suspend
> 0);
269 if (!--process
->suspend
)
271 struct thread
*thread
= process
->thread_list
;
272 for (; thread
; thread
= thread
->proc_next
)
274 if (!thread
->suspend
&& thread
->unix_pid
)
275 kill( thread
->unix_pid
, SIGCONT
);
280 /* kill a process on the spot */
281 void kill_process( struct process
*process
, int exit_code
)
283 while (process
->thread_list
)
284 kill_thread( process
->thread_list
, exit_code
);
287 /* get all information about a process */
288 static void get_process_info( struct process
*process
, struct get_process_info_request
*req
)
291 req
->exit_code
= process
->exit_code
;
292 req
->priority
= process
->priority
;
293 req
->process_affinity
= process
->affinity
;
294 req
->system_affinity
= 1;
297 /* set all information about a process */
298 static void set_process_info( struct process
*process
,
299 struct set_process_info_request
*req
)
301 if (req
->mask
& SET_PROCESS_INFO_PRIORITY
)
302 process
->priority
= req
->priority
;
303 if (req
->mask
& SET_PROCESS_INFO_AFFINITY
)
305 if (req
->affinity
!= 1) set_error( ERROR_INVALID_PARAMETER
);
306 else process
->affinity
= req
->affinity
;
310 /* take a snapshot of currently running processes */
311 struct process_snapshot
*process_snap( int *count
)
313 struct process_snapshot
*snapshot
, *ptr
;
314 struct process
*process
;
315 if (!running_processes
) return NULL
;
316 if (!(snapshot
= mem_alloc( sizeof(*snapshot
) * running_processes
)))
319 for (process
= first_process
; process
; process
= process
->next
)
321 if (!process
->running_threads
) continue;
322 ptr
->process
= process
;
323 ptr
->threads
= process
->running_threads
;
324 ptr
->priority
= process
->priority
;
325 grab_object( process
);
328 *count
= running_processes
;
332 /* create a new process */
333 DECL_HANDLER(new_process
)
335 size_t len
= get_req_strlen( req
->cmdline
);
336 struct process
*process
;
340 if ((process
= create_process( current
->process
, req
, req
->cmdline
, len
)))
342 req
->handle
= alloc_handle( current
->process
, process
, PROCESS_ALL_ACCESS
, req
->inherit
);
344 release_object( process
);
348 /* initialize a new process */
349 DECL_HANDLER(init_process
)
351 struct new_process_request
*info
;
353 if (current
->state
== STARTING
)
355 fatal_protocol_error( current
, "init_process: init_thread not called yet\n" );
358 if (!(info
= current
->process
->info
))
360 fatal_protocol_error( current
, "init_process: called twice\n" );
363 current
->process
->info
= NULL
;
364 req
->start_flags
= info
->start_flags
;
365 req
->hstdin
= info
->hstdin
;
366 req
->hstdout
= info
->hstdout
;
367 req
->hstderr
= info
->hstderr
;
368 req
->cmd_show
= info
->cmd_show
;
369 req
->env_ptr
= info
->env_ptr
;
370 strcpy( req
->cmdline
, info
->cmdline
);
374 /* open a handle to a process */
375 DECL_HANDLER(open_process
)
377 struct process
*process
= get_process_from_id( req
->pid
);
381 req
->handle
= alloc_handle( current
->process
, process
, req
->access
, req
->inherit
);
382 release_object( process
);
386 /* terminate a process */
387 DECL_HANDLER(terminate_process
)
389 struct process
*process
;
391 if ((process
= get_process_from_handle( req
->handle
, PROCESS_TERMINATE
)))
393 kill_process( process
, req
->exit_code
);
394 release_object( process
);
398 /* fetch information about a process */
399 DECL_HANDLER(get_process_info
)
401 struct process
*process
;
403 if ((process
= get_process_from_handle( req
->handle
, PROCESS_QUERY_INFORMATION
)))
405 get_process_info( process
, req
);
406 release_object( process
);
410 /* set information about a process */
411 DECL_HANDLER(set_process_info
)
413 struct process
*process
;
415 if ((process
= get_process_from_handle( req
->handle
, PROCESS_SET_INFORMATION
)))
417 set_process_info( process
, req
);
418 release_object( process
);