1 | /* |
---|
2 | * process.c - process related management |
---|
3 | * |
---|
4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
---|
5 | * Mohamed Lamine Karaoui (2015) |
---|
6 | * Alain Greiner (2016,2017,2018) |
---|
7 | * |
---|
8 | * Copyright (c) UPMC Sorbonne Universites |
---|
9 | * |
---|
10 | * This file is part of ALMOS-MKH. |
---|
11 | * |
---|
12 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
---|
13 | * under the terms of the GNU General Public License as published by |
---|
14 | * the Free Software Foundation; version 2.0 of the License. |
---|
15 | * |
---|
16 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
---|
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
19 | * General Public License for more details. |
---|
20 | * |
---|
21 | * You should have received a copy of the GNU General Public License |
---|
22 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
---|
23 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
---|
24 | */ |
---|
25 | |
---|
26 | #include <kernel_config.h> |
---|
27 | #include <hal_types.h> |
---|
28 | #include <hal_remote.h> |
---|
29 | #include <hal_uspace.h> |
---|
30 | #include <hal_irqmask.h> |
---|
31 | #include <errno.h> |
---|
32 | #include <printk.h> |
---|
33 | #include <memcpy.h> |
---|
34 | #include <bits.h> |
---|
35 | #include <kmem.h> |
---|
36 | #include <page.h> |
---|
37 | #include <vmm.h> |
---|
38 | #include <vfs.h> |
---|
39 | #include <core.h> |
---|
40 | #include <thread.h> |
---|
41 | #include <chdev.h> |
---|
42 | #include <list.h> |
---|
43 | #include <string.h> |
---|
44 | #include <scheduler.h> |
---|
45 | #include <remote_spinlock.h> |
---|
46 | #include <dqdt.h> |
---|
47 | #include <cluster.h> |
---|
48 | #include <ppm.h> |
---|
49 | #include <boot_info.h> |
---|
50 | #include <process.h> |
---|
51 | #include <elf.h> |
---|
52 | #include <syscalls.h> |
---|
53 | #include <shared_syscalls.h> |
---|
54 | |
---|
55 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
56 | // Extern global variables |
---|
57 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
58 | |
---|
59 | extern process_t process_zero; // allocated in kernel_init.c |
---|
60 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
---|
61 | |
---|
62 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
63 | // Process initialisation related functions |
---|
64 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
65 | |
---|
66 | /////////////////////////// |
---|
67 | process_t * process_alloc() |
---|
68 | { |
---|
69 | kmem_req_t req; |
---|
70 | |
---|
71 | req.type = KMEM_PROCESS; |
---|
72 | req.size = sizeof(process_t); |
---|
73 | req.flags = AF_KERNEL; |
---|
74 | |
---|
75 | return (process_t *)kmem_alloc( &req ); |
---|
76 | } |
---|
77 | |
---|
78 | //////////////////////////////////////// |
---|
79 | void process_free( process_t * process ) |
---|
80 | { |
---|
81 | kmem_req_t req; |
---|
82 | |
---|
83 | req.type = KMEM_PROCESS; |
---|
84 | req.ptr = process; |
---|
85 | kmem_free( &req ); |
---|
86 | } |
---|
87 | |
---|
88 | ///////////////////////////////////////////////// |
---|
89 | void process_reference_init( process_t * process, |
---|
90 | pid_t pid, |
---|
91 | xptr_t parent_xp, |
---|
92 | xptr_t model_xp ) |
---|
93 | { |
---|
94 | cxy_t parent_cxy; |
---|
95 | process_t * parent_ptr; |
---|
96 | cxy_t model_cxy; |
---|
97 | process_t * model_ptr; |
---|
98 | xptr_t stdin_xp; |
---|
99 | xptr_t stdout_xp; |
---|
100 | xptr_t stderr_xp; |
---|
101 | uint32_t stdin_id; |
---|
102 | uint32_t stdout_id; |
---|
103 | uint32_t stderr_id; |
---|
104 | error_t error; |
---|
105 | uint32_t txt_id; |
---|
106 | char rx_path[40]; |
---|
107 | char tx_path[40]; |
---|
108 | xptr_t chdev_xp; |
---|
109 | chdev_t * chdev_ptr; |
---|
110 | cxy_t chdev_cxy; |
---|
111 | pid_t model_pid; |
---|
112 | pid_t parent_pid; |
---|
113 | |
---|
114 | // get model process cluster and local pointer |
---|
115 | model_cxy = GET_CXY( model_xp ); |
---|
116 | model_ptr = GET_PTR( model_xp ); |
---|
117 | |
---|
118 | // get parent process cluster and local pointer |
---|
119 | parent_cxy = GET_CXY( parent_xp ); |
---|
120 | parent_ptr = GET_PTR( parent_xp ); |
---|
121 | |
---|
122 | // get model_pid and parent_pid |
---|
123 | parent_pid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
124 | model_pid = hal_remote_lw( XPTR( model_cxy , &model_ptr->pid ) ); |
---|
125 | |
---|
126 | #if CONFIG_DEBUG_PROCESS_REFERENCE_INIT |
---|
127 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
128 | if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT ) |
---|
129 | printk("\n[DBG] %s : thread %x enter / pid = %x / ppid = %x / model_pid = %x / cycle %d\n", |
---|
130 | __FUNCTION__ , CURRENT_THREAD , pid , parent_pid , model_pid , cycle ); |
---|
131 | #endif |
---|
132 | |
---|
133 | // initialize PID, REF_XP, PARENT_XP, and STATE |
---|
134 | process->pid = pid; |
---|
135 | process->ref_xp = XPTR( local_cxy , process ); |
---|
136 | process->parent_xp = parent_xp; |
---|
137 | process->term_state = 0; |
---|
138 | |
---|
139 | // initialize vmm as empty |
---|
140 | error = vmm_init( process ); |
---|
141 | assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n" ); |
---|
142 | |
---|
143 | #if (CONFIG_DEBUG_PROCESS_REFERENCE_INIT & 1) |
---|
144 | cycle = (uint32_t)hal_get_cycles(); |
---|
145 | if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT ) |
---|
146 | printk("\n[DBG] %s : thread %x / vmm empty for process %x / cycle %d\n", |
---|
147 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
---|
148 | #endif |
---|
149 | |
---|
150 | // initialize fd_array as empty |
---|
151 | process_fd_init( process ); |
---|
152 | |
---|
153 | // define the stdin/stdout/stderr pseudo files <=> select a TXT terminal. |
---|
154 | // - if INIT (pid == 1) => link to kernel TXT[0] |
---|
155 | // - if KSH[i] (model_pid == 1) => allocate a free TXT[i] |
---|
156 | // - if USER process => same terminal as model |
---|
157 | |
---|
158 | if( (pid == 1) || (model_pid == 1)) // INIT or KSH process |
---|
159 | { |
---|
160 | if (pid == 1 ) txt_id = 0; // INIT |
---|
161 | else txt_id = process_txt_alloc(); // KSH[i] |
---|
162 | |
---|
163 | // attach process to TXT[txt_id] |
---|
164 | process_txt_attach( process , txt_id ); |
---|
165 | |
---|
166 | // build path to TXT_RX[i] and TXT_TX[i] chdevs |
---|
167 | snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id ); |
---|
168 | snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id ); |
---|
169 | |
---|
170 | // create stdin pseudo file |
---|
171 | error = vfs_open( process, |
---|
172 | rx_path, |
---|
173 | O_RDONLY, |
---|
174 | 0, // FIXME chmod |
---|
175 | &stdin_xp, |
---|
176 | &stdin_id ); |
---|
177 | |
---|
178 | assert( (error == 0) , __FUNCTION__ , "cannot open stdin pseudo file" ); |
---|
179 | assert( (stdin_id == 0) , __FUNCTION__ , "stdin index must be 0" ); |
---|
180 | |
---|
181 | // create stdout pseudo file |
---|
182 | error = vfs_open( process, |
---|
183 | tx_path, |
---|
184 | O_WRONLY, |
---|
185 | 0, // FIXME chmod |
---|
186 | &stdout_xp, |
---|
187 | &stdout_id ); |
---|
188 | |
---|
189 | assert( (error == 0) , __FUNCTION__ , "cannot open stdout pseudo file" ); |
---|
190 | assert( (stdout_id == 1) , __FUNCTION__ , "stdout index must be 1" ); |
---|
191 | |
---|
192 | // create stderr pseudo file |
---|
193 | error = vfs_open( process, |
---|
194 | tx_path, |
---|
195 | O_WRONLY, |
---|
196 | 0, // FIXME chmod |
---|
197 | &stderr_xp, |
---|
198 | &stderr_id ); |
---|
199 | |
---|
200 | assert( (error == 0) , __FUNCTION__ , "cannot open stderr pseudo file" ); |
---|
201 | assert( (stderr_id == 2) , __FUNCTION__ , "stderr index must be 2" ); |
---|
202 | |
---|
203 | } |
---|
204 | else // normal user process |
---|
205 | { |
---|
206 | // get extended pointer on model process TXT chdev |
---|
207 | chdev_xp = chdev_from_file( model_ptr->fd_array.array[0] ); |
---|
208 | |
---|
209 | // get cluster and local pointer on chdev |
---|
210 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
211 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
212 | |
---|
213 | // get TXT terminal index |
---|
214 | txt_id = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
---|
215 | |
---|
216 | // attach process to TXT[txt_id] |
---|
217 | process_txt_attach( process , txt_id ); |
---|
218 | |
---|
219 | // copy all open files from model process fd_array to this process |
---|
220 | process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ), |
---|
221 | XPTR( model_cxy , &model_ptr->fd_array ) ); |
---|
222 | } |
---|
223 | |
---|
224 | // initialize specific inodes root and cwd |
---|
225 | process->vfs_root_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy, |
---|
226 | &model_ptr->vfs_root_xp ) ); |
---|
227 | process->vfs_cwd_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy, |
---|
228 | &model_ptr->vfs_cwd_xp ) ); |
---|
229 | vfs_inode_remote_up( process->vfs_root_xp ); |
---|
230 | vfs_inode_remote_up( process->vfs_cwd_xp ); |
---|
231 | |
---|
232 | remote_rwlock_init( XPTR( local_cxy , &process->cwd_lock ) ); |
---|
233 | |
---|
234 | #if (CONFIG_DEBUG_PROCESS_REFERENCE_INIT & 1) |
---|
235 | cycle = (uint32_t)hal_get_cycles(); |
---|
236 | if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT ) |
---|
237 | printk("\n[DBG] %s : thread %x / fd_array for process %x / cycle %d\n", |
---|
238 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
---|
239 | #endif |
---|
240 | |
---|
241 | // reset children list root |
---|
242 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
---|
243 | process->children_nr = 0; |
---|
244 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
---|
245 | |
---|
246 | // reset semaphore / mutex / barrier / condvar list roots |
---|
247 | xlist_root_init( XPTR( local_cxy , &process->sem_root ) ); |
---|
248 | xlist_root_init( XPTR( local_cxy , &process->mutex_root ) ); |
---|
249 | xlist_root_init( XPTR( local_cxy , &process->barrier_root ) ); |
---|
250 | xlist_root_init( XPTR( local_cxy , &process->condvar_root ) ); |
---|
251 | remote_spinlock_init( XPTR( local_cxy , &process->sync_lock ) ); |
---|
252 | |
---|
253 | // register new process in the local cluster manager pref_tbl[] |
---|
254 | lpid_t lpid = LPID_FROM_PID( pid ); |
---|
255 | LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process ); |
---|
256 | |
---|
257 | // register new process descriptor in local cluster manager local_list |
---|
258 | cluster_process_local_link( process ); |
---|
259 | |
---|
260 | // register new process descriptor in local cluster manager copies_list |
---|
261 | cluster_process_copies_link( process ); |
---|
262 | |
---|
263 | // reset th_tbl[] array as empty in process descriptor |
---|
264 | uint32_t i; |
---|
265 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
---|
266 | { |
---|
267 | process->th_tbl[i] = NULL; |
---|
268 | } |
---|
269 | process->th_nr = 0; |
---|
270 | spinlock_init( &process->th_lock ); |
---|
271 | |
---|
272 | hal_fence(); |
---|
273 | |
---|
274 | #if (CONFIG_DEBUG_PROCESS_REFERENCE_INIT & 1) |
---|
275 | cycle = (uint32_t)hal_get_cycles(); |
---|
276 | if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT ) |
---|
277 | printk("\n[DBG] %s : thread %x exit / process %x / cycle %d\n", |
---|
278 | __FUNCTION__ , CURRENT_THREAD , pid , cycle ); |
---|
279 | #endif |
---|
280 | |
---|
281 | } // process_reference_init() |
---|
282 | |
---|
283 | ///////////////////////////////////////////////////// |
---|
284 | error_t process_copy_init( process_t * local_process, |
---|
285 | xptr_t reference_process_xp ) |
---|
286 | { |
---|
287 | error_t error; |
---|
288 | |
---|
289 | // get reference process cluster and local pointer |
---|
290 | cxy_t ref_cxy = GET_CXY( reference_process_xp ); |
---|
291 | process_t * ref_ptr = GET_PTR( reference_process_xp ); |
---|
292 | |
---|
293 | // initialize PID, REF_XP, PARENT_XP, and STATE |
---|
294 | local_process->pid = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->pid ) ); |
---|
295 | local_process->parent_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->parent_xp ) ); |
---|
296 | local_process->ref_xp = reference_process_xp; |
---|
297 | local_process->term_state = 0; |
---|
298 | |
---|
299 | #if CONFIG_DEBUG_PROCESS_COPY_INIT |
---|
300 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
301 | if( CONFIG_DEBUG_PROCESS_COPY_INIT ) |
---|
302 | printk("\n[DBG] %s : thread %x enter for process %x\n", |
---|
303 | __FUNCTION__ , CURRENT_THREAD , local_process->pid ); |
---|
304 | #endif |
---|
305 | |
---|
306 | // reset local process vmm |
---|
307 | error = vmm_init( local_process ); |
---|
308 | assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n"); |
---|
309 | |
---|
310 | // reset process file descriptors array |
---|
311 | process_fd_init( local_process ); |
---|
312 | |
---|
313 | // reset vfs_root_xp / vfs_bin_xp / vfs_cwd_xp fields |
---|
314 | local_process->vfs_root_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) ); |
---|
315 | local_process->vfs_bin_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) ); |
---|
316 | local_process->vfs_cwd_xp = XPTR_NULL; |
---|
317 | |
---|
318 | // reset children list root (not used in a process descriptor copy) |
---|
319 | xlist_root_init( XPTR( local_cxy , &local_process->children_root ) ); |
---|
320 | local_process->children_nr = 0; |
---|
321 | remote_spinlock_init( XPTR( local_cxy , &local_process->children_lock ) ); |
---|
322 | |
---|
323 | // reset children_list (not used in a process descriptor copy) |
---|
324 | xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) ); |
---|
325 | |
---|
326 | // reset semaphores list root (not used in a process descriptor copy) |
---|
327 | xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) ); |
---|
328 | xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) ); |
---|
329 | xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) ); |
---|
330 | xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) ); |
---|
331 | |
---|
332 | // reset th_tbl[] array as empty |
---|
333 | uint32_t i; |
---|
334 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
---|
335 | { |
---|
336 | local_process->th_tbl[i] = NULL; |
---|
337 | } |
---|
338 | local_process->th_nr = 0; |
---|
339 | spinlock_init( &local_process->th_lock ); |
---|
340 | |
---|
341 | // register new process descriptor in local cluster manager local_list |
---|
342 | cluster_process_local_link( local_process ); |
---|
343 | |
---|
344 | // register new process descriptor in owner cluster manager copies_list |
---|
345 | cluster_process_copies_link( local_process ); |
---|
346 | |
---|
347 | hal_fence(); |
---|
348 | |
---|
349 | #if CONFIG_DEBUG_PROCESS_COPY_INIT |
---|
350 | cycle = (uint32_t)hal_get_cycles(); |
---|
351 | if( CONFIG_DEBUG_PROCESS_COPY_INIT ) |
---|
352 | printk("\n[DBG] %s : thread %x exit for process %x\n", |
---|
353 | __FUNCTION__ , CURRENT_THREAD , local_process->pid ); |
---|
354 | #endif |
---|
355 | |
---|
356 | return 0; |
---|
357 | |
---|
358 | } // end process_copy_init() |
---|
359 | |
---|
360 | /////////////////////////////////////////// |
---|
361 | void process_destroy( process_t * process ) |
---|
362 | { |
---|
363 | xptr_t parent_xp; |
---|
364 | process_t * parent_ptr; |
---|
365 | cxy_t parent_cxy; |
---|
366 | xptr_t children_lock_xp; |
---|
367 | |
---|
368 | pid_t pid = process->pid; |
---|
369 | |
---|
370 | assert( (process->th_nr == 0) , __FUNCTION__ , |
---|
371 | "process %x in cluster %x has still active threads", pid , local_cxy ); |
---|
372 | |
---|
373 | #if CONFIG_DEBUG_PROCESS_DESTROY |
---|
374 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
375 | if( CONFIG_DEBUG_PROCESS_DESTROY ) |
---|
376 | printk("\n[DBG] %s : thread %x enter to destroy process %x (pid = %x) / cycle %d\n", |
---|
377 | __FUNCTION__ , CURRENT_THREAD , process, pid , cycle ); |
---|
378 | #endif |
---|
379 | |
---|
380 | #if CONFIG_DEBUG_PROCESS_DESTROY |
---|
381 | if( CONFIG_DEBUG_PROCESS_DESTROY & 1 ) |
---|
382 | cluster_processes_display( CXY_FROM_PID( pid ) ); |
---|
383 | #endif |
---|
384 | |
---|
385 | // remove process from local_list in local cluster manager |
---|
386 | cluster_process_local_unlink( process ); |
---|
387 | |
---|
388 | // remove process from copies_list in owner cluster manager |
---|
389 | cluster_process_copies_unlink( process ); |
---|
390 | |
---|
391 | // remove process from children_list if process is in owner cluster |
---|
392 | if( CXY_FROM_PID( pid ) == local_cxy ) |
---|
393 | { |
---|
394 | // get pointers on parent process |
---|
395 | parent_xp = process->parent_xp; |
---|
396 | parent_cxy = GET_CXY( parent_xp ); |
---|
397 | parent_ptr = GET_PTR( parent_xp ); |
---|
398 | |
---|
399 | // get extended pointer on children_lock in parent process |
---|
400 | children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
---|
401 | |
---|
402 | // remove process from children_list |
---|
403 | remote_spinlock_lock( children_lock_xp ); |
---|
404 | xlist_unlink( XPTR( local_cxy , &process->children_list ) ); |
---|
405 | remote_spinlock_unlock( children_lock_xp ); |
---|
406 | } |
---|
407 | |
---|
408 | // release the process PID to cluster manager |
---|
409 | cluster_pid_release( pid ); |
---|
410 | |
---|
411 | // FIXME close all open files and update dirty [AG] |
---|
412 | |
---|
413 | // decrease refcount for bin file, root file and cwd file |
---|
414 | if( process->vfs_bin_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_bin_xp ); |
---|
415 | if( process->vfs_root_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_root_xp ); |
---|
416 | if( process->vfs_cwd_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_cwd_xp ); |
---|
417 | |
---|
418 | // Destroy VMM |
---|
419 | vmm_destroy( process ); |
---|
420 | |
---|
421 | // release memory allocated to process descriptor |
---|
422 | process_free( process ); |
---|
423 | |
---|
424 | #if CONFIG_DEBUG_PROCESS_DESTROY |
---|
425 | cycle = (uint32_t)hal_get_cycles(); |
---|
426 | if( CONFIG_DEBUG_PROCESS_DESTROY ) |
---|
427 | printk("\n[DBG] %s : thread %x exit / destroyed process %x (pid = %x) / cycle %d\n", |
---|
428 | __FUNCTION__ , CURRENT_THREAD , process, pid, cycle ); |
---|
429 | #endif |
---|
430 | |
---|
431 | } // end process_destroy() |
---|
432 | |
---|
433 | ///////////////////////////////////////////////// |
---|
434 | char * process_action_str( uint32_t action_type ) |
---|
435 | { |
---|
436 | if ( action_type == BLOCK_ALL_THREADS ) return "BLOCK"; |
---|
437 | else if( action_type == UNBLOCK_ALL_THREADS ) return "UNBLOCK"; |
---|
438 | else if( action_type == DELETE_ALL_THREADS ) return "DELETE"; |
---|
439 | else return "undefined"; |
---|
440 | } |
---|
441 | |
---|
442 | //////////////////////////////////////// |
---|
443 | void process_sigaction( pid_t pid, |
---|
444 | uint32_t action_type ) |
---|
445 | { |
---|
446 | cxy_t owner_cxy; // owner cluster identifier |
---|
447 | lpid_t lpid; // process index in owner cluster |
---|
448 | cluster_t * cluster; // pointer on cluster manager |
---|
449 | xptr_t root_xp; // extended pointer on root of copies |
---|
450 | xptr_t lock_xp; // extended pointer on lock protecting copies |
---|
451 | xptr_t iter_xp; // iterator on copies list |
---|
452 | xptr_t process_xp; // extended pointer on process copy |
---|
453 | cxy_t process_cxy; // process copy cluster identifier |
---|
454 | reg_t save_sr; // for critical section |
---|
455 | rpc_desc_t rpc; // shared RPC descriptor |
---|
456 | |
---|
457 | thread_t * client = CURRENT_THREAD; |
---|
458 | |
---|
459 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
460 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
461 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
462 | printk("\n[DBG] %s : thread %x enter to %s process %x / cycle %d\n", |
---|
463 | __FUNCTION__ , client, process_action_str( action_type ) , pid , cycle ); |
---|
464 | #endif |
---|
465 | |
---|
466 | // get pointer on local cluster manager |
---|
467 | cluster = LOCAL_CLUSTER; |
---|
468 | |
---|
469 | // get owner cluster identifier and process lpid |
---|
470 | owner_cxy = CXY_FROM_PID( pid ); |
---|
471 | lpid = LPID_FROM_PID( pid ); |
---|
472 | |
---|
473 | // get root of list of copies, lock, and number of copies from owner cluster |
---|
474 | root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] ); |
---|
475 | lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] ); |
---|
476 | |
---|
477 | // check action type |
---|
478 | assert( ((action_type == DELETE_ALL_THREADS ) || |
---|
479 | (action_type == BLOCK_ALL_THREADS ) || |
---|
480 | (action_type == UNBLOCK_ALL_THREADS )), __FUNCTION__ , "illegal action type" ); |
---|
481 | |
---|
482 | // allocate a - shared - RPC descriptor in client thread stack |
---|
483 | // it can be shared because all parallel, non-blocking, server threads |
---|
484 | // use the same input arguments, and use the shared RPC response field |
---|
485 | // but use |
---|
486 | |
---|
487 | // the client thread makes the following sequence: |
---|
488 | // 1. mask interrupts |
---|
489 | // 2. block itself |
---|
490 | // 3. send RPC requests to all copies |
---|
491 | // 4. unmask interrupts |
---|
492 | // 5. deschedule |
---|
493 | |
---|
494 | // mask IRQs |
---|
495 | hal_disable_irq( &save_sr); |
---|
496 | |
---|
497 | // client register blocking condition for itself |
---|
498 | thread_block( XPTR( local_cxy , client ) , THREAD_BLOCKED_RPC ); |
---|
499 | |
---|
500 | // take the lock protecting the copies |
---|
501 | remote_spinlock_lock( lock_xp ); |
---|
502 | |
---|
503 | // initialize shared RPC descriptor |
---|
504 | rpc.response = 0; |
---|
505 | rpc.blocking = false; |
---|
506 | rpc.index = RPC_PROCESS_SIGACTION; |
---|
507 | rpc.thread = client; |
---|
508 | rpc.lid = client->core->lid; |
---|
509 | rpc.args[0] = action_type; |
---|
510 | rpc.args[1] = pid; |
---|
511 | |
---|
512 | // send RPCs to all clusters containing process copiess |
---|
513 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
514 | { |
---|
515 | |
---|
516 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
517 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
518 | printk("\n[DBG] %s : send RPC to %s process %x in cluster %x\n", |
---|
519 | __FUNCTION__ , process_action_str( action_type ) , pid , process_cxy ); |
---|
520 | #endif |
---|
521 | // atomically increment responses counter |
---|
522 | hal_atomic_add( (void *)&rpc.response , 1 ); |
---|
523 | |
---|
524 | process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list ); |
---|
525 | process_cxy = GET_CXY( process_xp ); |
---|
526 | |
---|
527 | // call RPC in target cluster |
---|
528 | rpc_process_sigaction_client( process_cxy , &rpc ); |
---|
529 | } |
---|
530 | |
---|
531 | // release the lock protecting process copies |
---|
532 | remote_spinlock_unlock( lock_xp ); |
---|
533 | |
---|
534 | // restore IRQs |
---|
535 | hal_restore_irq( save_sr); |
---|
536 | |
---|
537 | // client deschedule : will be unblocked by the last RPC server thread |
---|
538 | sched_yield("blocked on rpc_process_sigaction"); |
---|
539 | |
---|
540 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
541 | cycle = (uint32_t)hal_get_cycles(); |
---|
542 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
543 | printk("\n[DBG] %s : thread %x exit after %s process %x in cluster %x / cycle %d\n", |
---|
544 | __FUNCTION__ , client, process_action_str( action_type ) , pid , local_cxy , cycle ); |
---|
545 | #endif |
---|
546 | |
---|
547 | } // end process_sigaction() |
---|
548 | |
---|
549 | ///////////////////////////////////////////////// |
---|
550 | void process_block_threads( process_t * process ) |
---|
551 | { |
---|
552 | thread_t * target; // pointer on target thread |
---|
553 | thread_t * this; // pointer on calling thread |
---|
554 | uint32_t ltid; // index in process th_tbl |
---|
555 | cxy_t owner_cxy; // target process owner cluster |
---|
556 | uint32_t count; // requests counter |
---|
557 | volatile uint32_t ack_count; // scheduler acknowledge counter |
---|
558 | |
---|
559 | // get calling thread pointer |
---|
560 | this = CURRENT_THREAD; |
---|
561 | |
---|
562 | // get target process owner cluster |
---|
563 | owner_cxy = CXY_FROM_PID( process->pid ); |
---|
564 | |
---|
565 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
566 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
567 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
568 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
569 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
570 | #endif |
---|
571 | |
---|
572 | // get lock protecting process th_tbl[] |
---|
573 | spinlock_lock( &process->th_lock ); |
---|
574 | |
---|
575 | // loop to block all threads but the main thread |
---|
576 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
577 | for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ ) |
---|
578 | { |
---|
579 | target = process->th_tbl[ltid]; |
---|
580 | |
---|
581 | if( target != NULL ) // thread exist |
---|
582 | { |
---|
583 | count++; |
---|
584 | |
---|
585 | // main thread should not be deleted |
---|
586 | if( (ltid != 0) || (owner_cxy != local_cxy) ) |
---|
587 | { |
---|
588 | // set the global blocked bit in target thread descriptor. |
---|
589 | thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
590 | |
---|
591 | // - if the calling thread and the target thread are on the same core, |
---|
592 | // we don't need confirmation from scheduler, |
---|
593 | // - if the calling thread and the target thread are not running on the same |
---|
594 | // core, we ask the target scheduler to acknowlege the blocking |
---|
595 | // to be sure that the target thread is not running. |
---|
596 | |
---|
597 | if( this->core->lid != target->core->lid ) |
---|
598 | { |
---|
599 | // increment responses counter |
---|
600 | hal_atomic_add( (void*)&ack_count , 1 ); |
---|
601 | |
---|
602 | // set FLAG_REQ_ACK and &ack_rsp_count in target descriptor |
---|
603 | thread_set_req_ack( target , (uint32_t *)&ack_count ); |
---|
604 | |
---|
605 | // force scheduling on target thread |
---|
606 | dev_pic_send_ipi( local_cxy , target->core->lid ); |
---|
607 | } |
---|
608 | } |
---|
609 | } |
---|
610 | } |
---|
611 | |
---|
612 | // release lock protecting process th_tbl[] |
---|
613 | spinlock_unlock( &process->th_lock ); |
---|
614 | |
---|
615 | // wait acknowledges |
---|
616 | while( 1 ) |
---|
617 | { |
---|
618 | // exit when all scheduler acknoledges received |
---|
619 | if ( ack_count == 0 ) break; |
---|
620 | |
---|
621 | // wait 1000 cycles before retry |
---|
622 | hal_fixed_delay( 1000 ); |
---|
623 | } |
---|
624 | |
---|
625 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
626 | cycle = (uint32_t)hal_get_cycles(); |
---|
627 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
628 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
629 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
630 | #endif |
---|
631 | |
---|
632 | } // end process_block_threads() |
---|
633 | |
---|
634 | /////////////////////////////////////////////////// |
---|
635 | void process_unblock_threads( process_t * process ) |
---|
636 | { |
---|
637 | thread_t * target; // pointer on target thead |
---|
638 | thread_t * this; // pointer on calling thread |
---|
639 | uint32_t ltid; // index in process th_tbl |
---|
640 | uint32_t count; // requests counter |
---|
641 | |
---|
642 | // get calling thread pointer |
---|
643 | this = CURRENT_THREAD; |
---|
644 | |
---|
645 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
646 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
647 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
648 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
649 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
650 | #endif |
---|
651 | |
---|
652 | // get lock protecting process th_tbl[] |
---|
653 | spinlock_lock( &process->th_lock ); |
---|
654 | |
---|
655 | // loop on process threads to unblock all threads |
---|
656 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
657 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
658 | { |
---|
659 | target = process->th_tbl[ltid]; |
---|
660 | |
---|
661 | if( target != NULL ) // thread found |
---|
662 | { |
---|
663 | count++; |
---|
664 | |
---|
665 | // reset the global blocked bit in target thread descriptor. |
---|
666 | thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL ); |
---|
667 | } |
---|
668 | } |
---|
669 | |
---|
670 | // release lock protecting process th_tbl[] |
---|
671 | spinlock_unlock( &process->th_lock ); |
---|
672 | |
---|
673 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
674 | cycle = (uint32_t)hal_get_cycles(); |
---|
675 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
676 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
677 | __FUNCTION__ , this , process->pid , local_cxy , cycle ); |
---|
678 | #endif |
---|
679 | |
---|
680 | } // end process_unblock_threads() |
---|
681 | |
---|
682 | ////////////////////////////////////////////////// |
---|
683 | void process_delete_threads( process_t * process ) |
---|
684 | { |
---|
685 | thread_t * target; // pointer on target thread |
---|
686 | uint32_t ltid; // index in process th_tbl |
---|
687 | uint32_t count; // threads counter |
---|
688 | |
---|
689 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
690 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
691 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
692 | printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n", |
---|
693 | __FUNCTION__ , CURRENT_THREAD , process->pid , local_cxy , cycle ); |
---|
694 | #endif |
---|
695 | |
---|
696 | // get lock protecting process th_tbl[] |
---|
697 | spinlock_lock( &process->th_lock ); |
---|
698 | |
---|
699 | // loop to set the REQ_DELETE flag on all threads but the main |
---|
700 | // we use both "ltid" and "count" because it can exist "holes" in th_tbl |
---|
701 | for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ ) |
---|
702 | { |
---|
703 | target = process->th_tbl[ltid]; |
---|
704 | |
---|
705 | if( target != NULL ) |
---|
706 | { |
---|
707 | count++; |
---|
708 | |
---|
709 | thread_kill( XPTR( local_cxy , target ), |
---|
710 | false, // is_exit |
---|
711 | true ); // is_forced |
---|
712 | } |
---|
713 | } |
---|
714 | |
---|
715 | // release lock protecting process th_tbl[] |
---|
716 | spinlock_unlock( &process->th_lock ); |
---|
717 | |
---|
718 | #if CONFIG_DEBUG_PROCESS_SIGACTION |
---|
719 | cycle = (uint32_t)hal_get_cycles(); |
---|
720 | if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle ) |
---|
721 | printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n", |
---|
722 | __FUNCTION__ , CURRENT_THREAD , process->pid , local_cxy , cycle ); |
---|
723 | #endif |
---|
724 | |
---|
725 | } // end process_delete_threads() |
---|
726 | |
---|
727 | /////////////////////////////////////////////// |
---|
728 | process_t * process_get_local_copy( pid_t pid ) |
---|
729 | { |
---|
730 | error_t error; |
---|
731 | process_t * process_ptr; // local pointer on process |
---|
732 | xptr_t process_xp; // extended pointer on process |
---|
733 | |
---|
734 | cluster_t * cluster = LOCAL_CLUSTER; |
---|
735 | |
---|
736 | // get lock protecting local list of processes |
---|
737 | remote_spinlock_lock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
738 | |
---|
739 | // scan the local list of process descriptors to find the process |
---|
740 | xptr_t iter; |
---|
741 | bool_t found = false; |
---|
742 | XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter ) |
---|
743 | { |
---|
744 | process_xp = XLIST_ELEMENT( iter , process_t , local_list ); |
---|
745 | process_ptr = GET_PTR( process_xp ); |
---|
746 | if( process_ptr->pid == pid ) |
---|
747 | { |
---|
748 | found = true; |
---|
749 | break; |
---|
750 | } |
---|
751 | } |
---|
752 | |
---|
753 | // release lock protecting local list of processes |
---|
754 | remote_spinlock_unlock( XPTR( local_cxy , &cluster->pmgr.local_lock ) ); |
---|
755 | |
---|
756 | // allocate memory for a new local process descriptor |
---|
757 | // and initialise it from reference cluster if required |
---|
758 | if( !found ) |
---|
759 | { |
---|
760 | // get extended pointer on reference process descriptor |
---|
761 | xptr_t ref_xp = cluster_get_reference_process_from_pid( pid ); |
---|
762 | |
---|
763 | assert( (ref_xp != XPTR_NULL) , __FUNCTION__ , "illegal pid\n" ); |
---|
764 | |
---|
765 | // allocate memory for local process descriptor |
---|
766 | process_ptr = process_alloc(); |
---|
767 | if( process_ptr == NULL ) return NULL; |
---|
768 | |
---|
769 | // initialize local process descriptor copy |
---|
770 | error = process_copy_init( process_ptr , ref_xp ); |
---|
771 | if( error ) return NULL; |
---|
772 | } |
---|
773 | |
---|
774 | return process_ptr; |
---|
775 | |
---|
776 | } // end process_get_local_copy() |
---|
777 | |
---|
778 | //////////////////////////////////////////// |
---|
779 | pid_t process_get_ppid( xptr_t process_xp ) |
---|
780 | { |
---|
781 | cxy_t process_cxy; |
---|
782 | process_t * process_ptr; |
---|
783 | xptr_t parent_xp; |
---|
784 | cxy_t parent_cxy; |
---|
785 | process_t * parent_ptr; |
---|
786 | |
---|
787 | // get process cluster and local pointer |
---|
788 | process_cxy = GET_CXY( process_xp ); |
---|
789 | process_ptr = GET_PTR( process_xp ); |
---|
790 | |
---|
791 | // get pointers on parent process |
---|
792 | parent_xp = (xptr_t)hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
793 | parent_cxy = GET_CXY( parent_xp ); |
---|
794 | parent_ptr = GET_PTR( parent_xp ); |
---|
795 | |
---|
796 | return hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
797 | } |
---|
798 | |
---|
799 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
800 | // File descriptor array related functions |
---|
801 | ////////////////////////////////////////////////////////////////////////////////////////// |
---|
802 | |
---|
803 | /////////////////////////////////////////// |
---|
804 | void process_fd_init( process_t * process ) |
---|
805 | { |
---|
806 | uint32_t fd; |
---|
807 | |
---|
808 | remote_spinlock_init( XPTR( local_cxy , &process->fd_array.lock ) ); |
---|
809 | |
---|
810 | process->fd_array.current = 0; |
---|
811 | |
---|
812 | // initialize array |
---|
813 | for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
814 | { |
---|
815 | process->fd_array.array[fd] = XPTR_NULL; |
---|
816 | } |
---|
817 | } |
---|
818 | |
---|
819 | ////////////////////////////// |
---|
820 | bool_t process_fd_array_full() |
---|
821 | { |
---|
822 | // get extended pointer on reference process |
---|
823 | xptr_t ref_xp = CURRENT_THREAD->process->ref_xp; |
---|
824 | |
---|
825 | // get reference process cluster and local pointer |
---|
826 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
827 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
828 | |
---|
829 | // get number of open file descriptors from reference fd_array |
---|
830 | uint32_t current = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->fd_array.current ) ); |
---|
831 | |
---|
832 | return ( current >= CONFIG_PROCESS_FILE_MAX_NR ); |
---|
833 | } |
---|
834 | |
---|
835 | ///////////////////////////////////////////////// |
---|
836 | error_t process_fd_register( process_t * process, |
---|
837 | xptr_t file_xp, |
---|
838 | uint32_t * fdid ) |
---|
839 | { |
---|
840 | bool_t found; |
---|
841 | uint32_t id; |
---|
842 | xptr_t xp; |
---|
843 | |
---|
844 | // get reference process cluster and local pointer |
---|
845 | xptr_t ref_xp = process->ref_xp; |
---|
846 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
847 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
848 | |
---|
849 | // take lock protecting reference fd_array |
---|
850 | remote_spinlock_lock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
851 | |
---|
852 | found = false; |
---|
853 | |
---|
854 | for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ ) |
---|
855 | { |
---|
856 | xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) ); |
---|
857 | if ( xp == XPTR_NULL ) |
---|
858 | { |
---|
859 | found = true; |
---|
860 | hal_remote_swd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) , file_xp ); |
---|
861 | hal_remote_atomic_add( XPTR( ref_cxy , &ref_ptr->fd_array.current ) , 1 ); |
---|
862 | *fdid = id; |
---|
863 | break; |
---|
864 | } |
---|
865 | } |
---|
866 | |
---|
867 | // release lock protecting reference fd_array |
---|
868 | remote_spinlock_unlock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) ); |
---|
869 | |
---|
870 | if ( !found ) return -1; |
---|
871 | else return 0; |
---|
872 | } |
---|
873 | |
---|
874 | //////////////////////////////////////////////// |
---|
875 | xptr_t process_fd_get_xptr( process_t * process, |
---|
876 | uint32_t fdid ) |
---|
877 | { |
---|
878 | xptr_t file_xp; |
---|
879 | |
---|
880 | // access local copy of process descriptor |
---|
881 | file_xp = process->fd_array.array[fdid]; |
---|
882 | |
---|
883 | if( file_xp == XPTR_NULL ) |
---|
884 | { |
---|
885 | // get reference process cluster and local pointer |
---|
886 | xptr_t ref_xp = process->ref_xp; |
---|
887 | cxy_t ref_cxy = GET_CXY( ref_xp ); |
---|
888 | process_t * ref_ptr = GET_PTR( ref_xp ); |
---|
889 | |
---|
890 | // access reference process descriptor |
---|
891 | file_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) ); |
---|
892 | |
---|
893 | // update local fd_array if found |
---|
894 | if( file_xp != XPTR_NULL ) |
---|
895 | { |
---|
896 | process->fd_array.array[fdid] = file_xp; |
---|
897 | } |
---|
898 | } |
---|
899 | |
---|
900 | return file_xp; |
---|
901 | |
---|
902 | } // end process_fd_get_xptr() |
---|
903 | |
---|
904 | /////////////////////////////////////////// |
---|
905 | void process_fd_remote_copy( xptr_t dst_xp, |
---|
906 | xptr_t src_xp ) |
---|
907 | { |
---|
908 | uint32_t fd; |
---|
909 | xptr_t entry; |
---|
910 | |
---|
911 | // get cluster and local pointer for src fd_array |
---|
912 | cxy_t src_cxy = GET_CXY( src_xp ); |
---|
913 | fd_array_t * src_ptr = GET_PTR( src_xp ); |
---|
914 | |
---|
915 | // get cluster and local pointer for dst fd_array |
---|
916 | cxy_t dst_cxy = GET_CXY( dst_xp ); |
---|
917 | fd_array_t * dst_ptr = GET_PTR( dst_xp ); |
---|
918 | |
---|
919 | // get the remote lock protecting the src fd_array |
---|
920 | remote_spinlock_lock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
921 | |
---|
922 | // loop on all fd_array entries |
---|
923 | for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ ) |
---|
924 | { |
---|
925 | entry = (xptr_t)hal_remote_lwd( XPTR( src_cxy , &src_ptr->array[fd] ) ); |
---|
926 | |
---|
927 | if( entry != XPTR_NULL ) |
---|
928 | { |
---|
929 | // increment file descriptor ref count |
---|
930 | vfs_file_count_up( entry ); |
---|
931 | |
---|
932 | // copy entry in destination process fd_array |
---|
933 | hal_remote_swd( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry ); |
---|
934 | } |
---|
935 | } |
---|
936 | |
---|
937 | // release lock on source process fd_array |
---|
938 | remote_spinlock_unlock( XPTR( src_cxy , &src_ptr->lock ) ); |
---|
939 | |
---|
940 | } // end process_fd_remote_copy() |
---|
941 | |
---|
942 | //////////////////////////////////////////////////////////////////////////////////// |
---|
943 | // Thread related functions |
---|
944 | //////////////////////////////////////////////////////////////////////////////////// |
---|
945 | |
---|
946 | ///////////////////////////////////////////////////// |
---|
947 | error_t process_register_thread( process_t * process, |
---|
948 | thread_t * thread, |
---|
949 | trdid_t * trdid ) |
---|
950 | { |
---|
951 | ltid_t ltid; |
---|
952 | bool_t found = false; |
---|
953 | |
---|
954 | assert( (process != NULL) , __FUNCTION__ , "process argument is NULL" ); |
---|
955 | |
---|
956 | assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" ); |
---|
957 | |
---|
958 | // take lock protecting th_tbl |
---|
959 | spinlock_lock( &process->th_lock ); |
---|
960 | |
---|
961 | // search a free slot in th_tbl[] |
---|
962 | for( ltid = 0 ; ltid < CONFIG_THREAD_MAX_PER_CLUSTER ; ltid++ ) |
---|
963 | { |
---|
964 | if( process->th_tbl[ltid] == NULL ) |
---|
965 | { |
---|
966 | found = true; |
---|
967 | break; |
---|
968 | } |
---|
969 | } |
---|
970 | |
---|
971 | if( found ) |
---|
972 | { |
---|
973 | // register thread in th_tbl[] |
---|
974 | process->th_tbl[ltid] = thread; |
---|
975 | process->th_nr++; |
---|
976 | |
---|
977 | // returns trdid |
---|
978 | *trdid = TRDID( local_cxy , ltid ); |
---|
979 | } |
---|
980 | |
---|
981 | |
---|
982 | // release lock protecting th_tbl |
---|
983 | hal_fence(); |
---|
984 | spinlock_unlock( &process->th_lock ); |
---|
985 | |
---|
986 | return (found) ? 0 : ENOMEM; |
---|
987 | |
---|
988 | } // end process_register_thread() |
---|
989 | |
---|
990 | /////////////////////////////////////////////// |
---|
991 | void process_remove_thread( thread_t * thread ) |
---|
992 | { |
---|
993 | assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" ); |
---|
994 | |
---|
995 | process_t * process = thread->process; |
---|
996 | |
---|
997 | // get thread local index |
---|
998 | ltid_t ltid = LTID_FROM_TRDID( thread->trdid ); |
---|
999 | |
---|
1000 | // take lock protecting th_tbl |
---|
1001 | spinlock_lock( &process->th_lock ); |
---|
1002 | |
---|
1003 | assert( (process->th_nr) , __FUNCTION__ , "process th_nr cannot be 0\n" ); |
---|
1004 | |
---|
1005 | // remove thread from th_tbl[] |
---|
1006 | process->th_tbl[ltid] = NULL; |
---|
1007 | process->th_nr--; |
---|
1008 | |
---|
1009 | hal_fence(); |
---|
1010 | |
---|
1011 | // release lock protecting th_tbl |
---|
1012 | spinlock_unlock( &process->th_lock ); |
---|
1013 | |
---|
1014 | } // process_remove_thread() |
---|
1015 | |
---|
1016 | ///////////////////////////////////////////////////////// |
---|
1017 | error_t process_make_fork( xptr_t parent_process_xp, |
---|
1018 | xptr_t parent_thread_xp, |
---|
1019 | pid_t * child_pid, |
---|
1020 | thread_t ** child_thread ) |
---|
1021 | { |
---|
1022 | process_t * process; // local pointer on child process descriptor |
---|
1023 | thread_t * thread; // local pointer on child thread descriptor |
---|
1024 | pid_t new_pid; // process identifier for child process |
---|
1025 | pid_t parent_pid; // process identifier for parent process |
---|
1026 | xptr_t ref_xp; // extended pointer on reference process |
---|
1027 | xptr_t vfs_bin_xp; // extended pointer on .elf file |
---|
1028 | error_t error; |
---|
1029 | |
---|
1030 | // get cluster and local pointer for parent process |
---|
1031 | cxy_t parent_process_cxy = GET_CXY( parent_process_xp ); |
---|
1032 | process_t * parent_process_ptr = GET_PTR( parent_process_xp ); |
---|
1033 | |
---|
1034 | // get parent process PID and extended pointer on .elf file |
---|
1035 | parent_pid = hal_remote_lw (XPTR( parent_process_cxy , &parent_process_ptr->pid)); |
---|
1036 | vfs_bin_xp = hal_remote_lwd(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp)); |
---|
1037 | |
---|
1038 | // check parent process is the reference |
---|
1039 | ref_xp = hal_remote_lwd( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) ); |
---|
1040 | assert( (parent_process_xp == ref_xp ) , __FUNCTION__ , |
---|
1041 | "parent process must be the reference process\n" ); |
---|
1042 | |
---|
1043 | #if CONFIG_DEBUG_PROCESS_MAKE_FORK |
---|
1044 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1045 | if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1046 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
---|
1047 | __FUNCTION__, CURRENT_THREAD, parent_pid, cycle ); |
---|
1048 | #endif |
---|
1049 | |
---|
1050 | // allocate a process descriptor |
---|
1051 | process = process_alloc(); |
---|
1052 | if( process == NULL ) |
---|
1053 | { |
---|
1054 | printk("\n[ERROR] in %s : cannot get process in cluster %x\n", |
---|
1055 | __FUNCTION__, local_cxy ); |
---|
1056 | return -1; |
---|
1057 | } |
---|
1058 | |
---|
1059 | // allocate a child PID from local cluster |
---|
1060 | error = cluster_pid_alloc( process , &new_pid ); |
---|
1061 | if( error ) |
---|
1062 | { |
---|
1063 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
1064 | __FUNCTION__, local_cxy ); |
---|
1065 | process_free( process ); |
---|
1066 | return -1; |
---|
1067 | } |
---|
1068 | |
---|
1069 | // initializes child process descriptor from parent process descriptor |
---|
1070 | process_reference_init( process, |
---|
1071 | new_pid, |
---|
1072 | parent_process_xp, |
---|
1073 | parent_process_xp ); |
---|
1074 | |
---|
1075 | #if( CONFIG_DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1076 | cycle = (uint32_t)hal_get_cycles(); |
---|
1077 | if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1078 | printk("\n[DBG] %s : thread %x created child_process %x / child_pid %x / cycle %d\n", |
---|
1079 | __FUNCTION__, CURRENT_THREAD, process, new_pid, cycle ); |
---|
1080 | #endif |
---|
1081 | |
---|
1082 | // copy VMM from parent descriptor to child descriptor |
---|
1083 | error = vmm_fork_copy( process, |
---|
1084 | parent_process_xp ); |
---|
1085 | if( error ) |
---|
1086 | { |
---|
1087 | printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n", |
---|
1088 | __FUNCTION__, local_cxy ); |
---|
1089 | process_free( process ); |
---|
1090 | cluster_pid_release( new_pid ); |
---|
1091 | return -1; |
---|
1092 | } |
---|
1093 | |
---|
1094 | #if( CONFIG_DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1095 | cycle = (uint32_t)hal_get_cycles(); |
---|
1096 | if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1097 | printk("\n[DBG] %s : thread %x copied VMM from parent %x to child %x / cycle %d\n", |
---|
1098 | __FUNCTION__ , CURRENT_THREAD , parent_pid, new_pid, cycle ); |
---|
1099 | #endif |
---|
1100 | |
---|
1101 | // update extended pointer on .elf file |
---|
1102 | process->vfs_bin_xp = vfs_bin_xp; |
---|
1103 | |
---|
1104 | // create child thread descriptor from parent thread descriptor |
---|
1105 | error = thread_user_fork( parent_thread_xp, |
---|
1106 | process, |
---|
1107 | &thread ); |
---|
1108 | if( error ) |
---|
1109 | { |
---|
1110 | printk("\n[ERROR] in %s : cannot create thread in cluster %x\n", |
---|
1111 | __FUNCTION__, local_cxy ); |
---|
1112 | process_free( process ); |
---|
1113 | cluster_pid_release( new_pid ); |
---|
1114 | return -1; |
---|
1115 | } |
---|
1116 | |
---|
1117 | // check main thread index |
---|
1118 | assert( (thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" ); |
---|
1119 | |
---|
1120 | #if( CONFIG_DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1121 | cycle = (uint32_t)hal_get_cycles(); |
---|
1122 | if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1123 | printk("\n[DBG] %s : thread %x created child thread %x / cycle %d\n", |
---|
1124 | __FUNCTION__ , CURRENT_THREAD, thread, cycle ); |
---|
1125 | #endif |
---|
1126 | |
---|
1127 | // set Copy_On_Write flag in parent process GPT |
---|
1128 | // this includes all replicated GPT copies |
---|
1129 | if( parent_process_cxy == local_cxy ) // reference is local |
---|
1130 | { |
---|
1131 | vmm_set_cow( parent_process_ptr ); |
---|
1132 | } |
---|
1133 | else // reference is remote |
---|
1134 | { |
---|
1135 | rpc_vmm_set_cow_client( parent_process_cxy, |
---|
1136 | parent_process_ptr ); |
---|
1137 | } |
---|
1138 | |
---|
1139 | // set Copy_On_Write flag in child process GPT |
---|
1140 | vmm_set_cow( process ); |
---|
1141 | |
---|
1142 | #if( CONFIG_DEBUG_PROCESS_MAKE_FORK & 1 ) |
---|
1143 | cycle = (uint32_t)hal_get_cycles(); |
---|
1144 | if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1145 | printk("\n[DBG] %s : thread %x set COW in parent and child / cycle %d\n", |
---|
1146 | __FUNCTION__ , CURRENT_THREAD, cycle ); |
---|
1147 | #endif |
---|
1148 | |
---|
1149 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
1150 | xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root ); |
---|
1151 | xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock ); |
---|
1152 | xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr ); |
---|
1153 | |
---|
1154 | // register process in parent children list |
---|
1155 | remote_spinlock_lock( children_lock_xp ); |
---|
1156 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
1157 | hal_remote_atomic_add( children_nr_xp , 1 ); |
---|
1158 | remote_spinlock_unlock( children_lock_xp ); |
---|
1159 | |
---|
1160 | // return success |
---|
1161 | *child_thread = thread; |
---|
1162 | *child_pid = new_pid; |
---|
1163 | |
---|
1164 | #if CONFIG_DEBUG_PROCESS_MAKE_FORK |
---|
1165 | cycle = (uint32_t)hal_get_cycles(); |
---|
1166 | if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle ) |
---|
1167 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", |
---|
1168 | __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
1169 | #endif |
---|
1170 | |
---|
1171 | return 0; |
---|
1172 | |
---|
1173 | } // end process_make_fork() |
---|
1174 | |
---|
1175 | |
---|
1176 | ///////////////////////////////////////////////////// |
---|
1177 | error_t process_make_exec( exec_info_t * exec_info ) |
---|
1178 | { |
---|
1179 | char * path; // pathname to .elf file |
---|
1180 | pid_t pid; // old_process PID / given to new_process |
---|
1181 | pid_t temp_pid; // temporary PID / given to old_process |
---|
1182 | process_t * old_process; // local pointer on old process |
---|
1183 | thread_t * old_thread; // local pointer on old thread |
---|
1184 | process_t * new_process; // local pointer on new process |
---|
1185 | thread_t * new_thread; // local pointer on new thread |
---|
1186 | xptr_t parent_xp; // extended pointer on parent process |
---|
1187 | pthread_attr_t attr; // new thread attributes |
---|
1188 | lid_t lid; // selected core local index |
---|
1189 | error_t error; |
---|
1190 | |
---|
1191 | // get old_thread / old_process / PID / parent_xp |
---|
1192 | old_thread = CURRENT_THREAD; |
---|
1193 | old_process = old_thread->process; |
---|
1194 | pid = old_process->pid; |
---|
1195 | parent_xp = old_process->parent_xp; |
---|
1196 | |
---|
1197 | // get .elf pathname from exec_info |
---|
1198 | path = exec_info->path; |
---|
1199 | |
---|
1200 | // this function must be executed by a thread running in owner cluster |
---|
1201 | assert( (CXY_FROM_PID( pid ) == local_cxy), __FUNCTION__, |
---|
1202 | "local_cluster must be owner_cluster\n" ); |
---|
1203 | |
---|
1204 | assert( (LTID_FROM_TRDID( old_thread->trdid ) == 0) , __FUNCTION__, |
---|
1205 | "must be called by the main thread\n" ); |
---|
1206 | |
---|
1207 | #if CONFIG_DEBUG_PROCESS_MAKE_EXEC |
---|
1208 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1209 | if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1210 | printk("\n[DBG] %s : thread %x enters for process %x / %s / cycle %d\n", |
---|
1211 | __FUNCTION__, old_thread, pid, path, cycle ); |
---|
1212 | #endif |
---|
1213 | |
---|
1214 | // allocate memory for new_process descriptor |
---|
1215 | new_process = process_alloc(); |
---|
1216 | |
---|
1217 | if( new_process == NULL ) |
---|
1218 | { |
---|
1219 | printk("\n[ERROR] in %s : cannot allocate process descriptor in cluster %x\n", |
---|
1220 | __FUNCTION__ , local_cxy ); |
---|
1221 | return -1; |
---|
1222 | } |
---|
1223 | |
---|
1224 | // get a temporary PID for old_process |
---|
1225 | error = cluster_pid_alloc( old_process , &temp_pid ); |
---|
1226 | if( error ) |
---|
1227 | { |
---|
1228 | printk("\n[ERROR] in %s : cannot get PID in cluster %x\n", |
---|
1229 | __FUNCTION__ , local_cxy ); |
---|
1230 | process_free( new_process ); |
---|
1231 | return -1; |
---|
1232 | } |
---|
1233 | |
---|
1234 | // set temporary PID to old_process |
---|
1235 | old_process->pid = temp_pid; |
---|
1236 | |
---|
1237 | // initialize new process descriptor |
---|
1238 | process_reference_init( new_process, |
---|
1239 | pid, |
---|
1240 | parent_xp, // parent_process_xp |
---|
1241 | XPTR(local_cxy , old_process) ); // model_process |
---|
1242 | |
---|
1243 | // give TXT ownership to new_process |
---|
1244 | process_txt_set_ownership( XPTR( local_cxy , new_process) ); |
---|
1245 | |
---|
1246 | #if( CONFIG_DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
1247 | cycle = (uint32_t)hal_get_cycles(); |
---|
1248 | if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1249 | printk("\n[DBG] %s : thread %x created new process %x / cycle %d \n", |
---|
1250 | __FUNCTION__ , old_thread , new_process , cycle ); |
---|
1251 | #endif |
---|
1252 | |
---|
1253 | // register code & data vsegs as well as entry-point in new process VMM, |
---|
1254 | // and register extended pointer on .elf file in process descriptor |
---|
1255 | if( elf_load_process( path , new_process ) ) |
---|
1256 | { |
---|
1257 | printk("\n[ERROR] in %s : failed to access .elf file for path %s\n", |
---|
1258 | __FUNCTION__ , path ); |
---|
1259 | process_destroy( new_process ); |
---|
1260 | return -1; |
---|
1261 | } |
---|
1262 | |
---|
1263 | #if( CONFIG_DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
1264 | cycle = (uint32_t)hal_get_cycles(); |
---|
1265 | if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1266 | printk("\n[DBG] %s : thread %x registered code/data vsegs in new process %x / cycle %d\n", |
---|
1267 | __FUNCTION__, old_thread , new_process->pid , cycle ); |
---|
1268 | #endif |
---|
1269 | |
---|
1270 | // select a core in local cluster to execute the main thread |
---|
1271 | lid = cluster_select_local_core(); |
---|
1272 | |
---|
1273 | // initialize pthread attributes for main thread |
---|
1274 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
1275 | attr.cxy = local_cxy; |
---|
1276 | attr.lid = lid; |
---|
1277 | |
---|
1278 | // create and initialize main thread in local cluster |
---|
1279 | error = thread_user_create( pid, |
---|
1280 | (void *)new_process->vmm.entry_point, |
---|
1281 | exec_info->args_pointers, |
---|
1282 | &attr, |
---|
1283 | &new_thread ); |
---|
1284 | if( error ) |
---|
1285 | { |
---|
1286 | printk("\n[ERROR] in %s : cannot create thread for process %x\n", |
---|
1287 | __FUNCTION__ , new_process ); |
---|
1288 | process_destroy( new_process ); |
---|
1289 | return -1; |
---|
1290 | } |
---|
1291 | |
---|
1292 | // check main thread index |
---|
1293 | assert( (new_thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" ); |
---|
1294 | |
---|
1295 | #if( CONFIG_DEBUG_PROCESS_MAKE_EXEC & 1 ) |
---|
1296 | cycle = (uint32_t)hal_get_cycles(); |
---|
1297 | if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1298 | printk("\n[DBG] %s : thread %x created new_process main thread %x / cycle %d\n", |
---|
1299 | __FUNCTION__ , old_thread , new_thread , cycle ); |
---|
1300 | #endif |
---|
1301 | |
---|
1302 | // get cluster and local pointer on parent process |
---|
1303 | process_t * parent_ptr = GET_PTR( parent_xp ); |
---|
1304 | cxy_t parent_cxy = GET_CXY( parent_xp ); |
---|
1305 | |
---|
1306 | // get extended pointers on parent children_root, children_lock and children_nr |
---|
1307 | xptr_t root_xp = XPTR( parent_cxy , &parent_ptr->children_root ); |
---|
1308 | xptr_t lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock ); |
---|
1309 | xptr_t nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr ); |
---|
1310 | |
---|
1311 | // register new_process in parent children list |
---|
1312 | remote_spinlock_lock( lock_xp ); |
---|
1313 | xlist_add_last( root_xp , XPTR( local_cxy , &new_process->children_list ) ); |
---|
1314 | hal_remote_atomic_add( nr_xp , 1 ); |
---|
1315 | remote_spinlock_unlock( lock_xp ); |
---|
1316 | |
---|
1317 | // activate new thread |
---|
1318 | thread_unblock( XPTR( local_cxy , new_thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
1319 | |
---|
1320 | // detach old_process from TXT |
---|
1321 | process_txt_detach( XPTR( local_cxy , old_process ) ); |
---|
1322 | |
---|
1323 | // request old_thread destruction => old_process destruction |
---|
1324 | thread_block( XPTR( local_cxy , old_thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
1325 | hal_atomic_or( &old_thread->flags , THREAD_FLAG_REQ_DELETE ); |
---|
1326 | |
---|
1327 | hal_fence(); |
---|
1328 | |
---|
1329 | #if CONFIG_DEBUG_PROCESS_MAKE_EXEC |
---|
1330 | cycle = (uint32_t)hal_get_cycles(); |
---|
1331 | if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle ) |
---|
1332 | printk("\n[DBG] %s : old_thread %x blocked / new_thread %x activated / cycle %d\n", |
---|
1333 | __FUNCTION__ , old_thread , new_thread , cycle ); |
---|
1334 | #endif |
---|
1335 | |
---|
1336 | return 0; |
---|
1337 | |
---|
1338 | } // end process_make_exec() |
---|
1339 | |
---|
1340 | /////////////////////////////////////////////// |
---|
1341 | void process_zero_create( process_t * process ) |
---|
1342 | { |
---|
1343 | |
---|
1344 | #if CONFIG_DEBUG_PROCESS_ZERO_CREATE |
---|
1345 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1346 | if( CONFIG_DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
1347 | printk("\n[DBG] %s : thread %x enter / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
1348 | #endif |
---|
1349 | |
---|
1350 | // initialize PID, REF_XP, PARENT_XP, and STATE |
---|
1351 | process->pid = 0; |
---|
1352 | process->ref_xp = XPTR( local_cxy , process ); |
---|
1353 | process->parent_xp = XPTR_NULL; |
---|
1354 | process->term_state = 0; |
---|
1355 | |
---|
1356 | // reset th_tbl[] array as empty |
---|
1357 | uint32_t i; |
---|
1358 | for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ ) |
---|
1359 | { |
---|
1360 | process->th_tbl[i] = NULL; |
---|
1361 | } |
---|
1362 | process->th_nr = 0; |
---|
1363 | spinlock_init( &process->th_lock ); |
---|
1364 | |
---|
1365 | // reset children list as empty |
---|
1366 | xlist_root_init( XPTR( local_cxy , &process->children_root ) ); |
---|
1367 | remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) ); |
---|
1368 | process->children_nr = 0; |
---|
1369 | |
---|
1370 | hal_fence(); |
---|
1371 | |
---|
1372 | #if CONFIG_DEBUG_PROCESS_ZERO_CREATE |
---|
1373 | cycle = (uint32_t)hal_get_cycles(); |
---|
1374 | if( CONFIG_DEBUG_PROCESS_ZERO_CREATE < cycle ) |
---|
1375 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
1376 | #endif |
---|
1377 | |
---|
1378 | } // end process_zero_init() |
---|
1379 | |
---|
1380 | ////////////////////////// |
---|
1381 | void process_init_create() |
---|
1382 | { |
---|
1383 | process_t * process; // local pointer on process descriptor |
---|
1384 | pid_t pid; // process_init identifier |
---|
1385 | thread_t * thread; // local pointer on main thread |
---|
1386 | pthread_attr_t attr; // main thread attributes |
---|
1387 | lid_t lid; // selected core local index for main thread |
---|
1388 | error_t error; |
---|
1389 | |
---|
1390 | #if CONFIG_DEBUG_PROCESS_INIT_CREATE |
---|
1391 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1392 | if( CONFIG_DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1393 | printk("\n[DBG] %s : thread %x enter / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
1394 | #endif |
---|
1395 | |
---|
1396 | // allocates memory for process descriptor from local cluster |
---|
1397 | process = process_alloc(); |
---|
1398 | if( process == NULL ) |
---|
1399 | { |
---|
1400 | printk("\n[PANIC] in %s : no memory for process descriptor in cluster %x\n", |
---|
1401 | __FUNCTION__, local_cxy ); |
---|
1402 | } |
---|
1403 | |
---|
1404 | // get PID from local cluster |
---|
1405 | error = cluster_pid_alloc( process , &pid ); |
---|
1406 | if( error ) |
---|
1407 | { |
---|
1408 | printk("\n[PANIC] in %s : cannot allocate PID in cluster %x\n", |
---|
1409 | __FUNCTION__, local_cxy ); |
---|
1410 | process_free( process ); |
---|
1411 | } |
---|
1412 | |
---|
1413 | // check allocated PID |
---|
1414 | assert( (pid == 1) , __FUNCTION__ , "process INIT must be first process in cluster 0\n" ); |
---|
1415 | |
---|
1416 | // initialize process descriptor / parent is local process_zero |
---|
1417 | process_reference_init( process, |
---|
1418 | pid, |
---|
1419 | XPTR( local_cxy , &process_zero ), // parent |
---|
1420 | XPTR( local_cxy , &process_zero ) ); // model |
---|
1421 | |
---|
1422 | // register "code" and "data" vsegs as well as entry-point |
---|
1423 | // in process VMM, using information contained in the elf file. |
---|
1424 | if( elf_load_process( CONFIG_PROCESS_INIT_PATH , process ) ) |
---|
1425 | { |
---|
1426 | printk("\n[PANIC] in %s : cannot access .elf file / path = %s\n", |
---|
1427 | __FUNCTION__, CONFIG_PROCESS_INIT_PATH ); |
---|
1428 | process_destroy( process ); |
---|
1429 | } |
---|
1430 | |
---|
1431 | // get extended pointers on process_zero children_root, children_lock |
---|
1432 | xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root ); |
---|
1433 | xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock ); |
---|
1434 | |
---|
1435 | // register process INIT in parent local process_zero |
---|
1436 | remote_spinlock_lock( children_lock_xp ); |
---|
1437 | xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) ); |
---|
1438 | hal_atomic_add( &process_zero.children_nr , 1 ); |
---|
1439 | remote_spinlock_unlock( children_lock_xp ); |
---|
1440 | |
---|
1441 | // select a core in local cluster to execute the main thread |
---|
1442 | lid = cluster_select_local_core(); |
---|
1443 | |
---|
1444 | // initialize pthread attributes for main thread |
---|
1445 | attr.attributes = PT_ATTR_DETACH | PT_ATTR_CLUSTER_DEFINED | PT_ATTR_CORE_DEFINED; |
---|
1446 | attr.cxy = local_cxy; |
---|
1447 | attr.lid = lid; |
---|
1448 | |
---|
1449 | // create and initialize thread descriptor |
---|
1450 | error = thread_user_create( pid, |
---|
1451 | (void *)process->vmm.entry_point, |
---|
1452 | NULL, |
---|
1453 | &attr, |
---|
1454 | &thread ); |
---|
1455 | if( error ) |
---|
1456 | { |
---|
1457 | printk("\n[PANIC] in %s : cannot create main thread / path = %s\n", |
---|
1458 | __FUNCTION__, CONFIG_PROCESS_INIT_PATH ); |
---|
1459 | process_destroy( process ); |
---|
1460 | } |
---|
1461 | |
---|
1462 | // check main thread index |
---|
1463 | assert( (thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" ); |
---|
1464 | |
---|
1465 | // activate thread |
---|
1466 | thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL ); |
---|
1467 | |
---|
1468 | hal_fence(); |
---|
1469 | |
---|
1470 | #if CONFIG_DEBUG_PROCESS_INIT_CREATE |
---|
1471 | cycle = (uint32_t)hal_get_cycles(); |
---|
1472 | if( CONFIG_DEBUG_PROCESS_INIT_CREATE < cycle ) |
---|
1473 | printk("\n[DBG] %s : thread %x exit / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle ); |
---|
1474 | #endif |
---|
1475 | |
---|
1476 | } // end process_init_create() |
---|
1477 | |
---|
1478 | ///////////////////////////////////////// |
---|
1479 | void process_display( xptr_t process_xp ) |
---|
1480 | { |
---|
1481 | process_t * process_ptr; |
---|
1482 | cxy_t process_cxy; |
---|
1483 | xptr_t parent_xp; // extended pointer on parent process |
---|
1484 | process_t * parent_ptr; |
---|
1485 | cxy_t parent_cxy; |
---|
1486 | |
---|
1487 | pid_t pid; |
---|
1488 | pid_t ppid; |
---|
1489 | uint32_t state; |
---|
1490 | xptr_t ref_xp; |
---|
1491 | uint32_t th_nr; |
---|
1492 | |
---|
1493 | xptr_t txt_file_xp; // extended pointer on TXT_RX pseudo file |
---|
1494 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1495 | chdev_t * chdev_ptr; |
---|
1496 | cxy_t chdev_cxy; |
---|
1497 | xptr_t owner_xp; // extended pointer on TXT owner process |
---|
1498 | |
---|
1499 | xptr_t elf_file_xp; // extended pointer on .elf file |
---|
1500 | cxy_t elf_file_cxy; |
---|
1501 | vfs_file_t * elf_file_ptr; |
---|
1502 | vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode |
---|
1503 | |
---|
1504 | char txt_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1505 | char elf_name[CONFIG_VFS_MAX_NAME_LENGTH]; |
---|
1506 | |
---|
1507 | // get cluster and local pointer on process |
---|
1508 | process_ptr = GET_PTR( process_xp ); |
---|
1509 | process_cxy = GET_CXY( process_xp ); |
---|
1510 | |
---|
1511 | // check reference process |
---|
1512 | ref_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->ref_xp ) ); |
---|
1513 | assert( (process_xp == ref_xp) , __FUNCTION__ , "process is not the reference\n"); |
---|
1514 | |
---|
1515 | // get PID and state |
---|
1516 | pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
1517 | state = hal_remote_lw( XPTR( process_cxy , &process_ptr->term_state ) ); |
---|
1518 | |
---|
1519 | // get PPID |
---|
1520 | parent_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) ); |
---|
1521 | parent_cxy = GET_CXY( parent_xp ); |
---|
1522 | parent_ptr = GET_PTR( parent_xp ); |
---|
1523 | ppid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) ); |
---|
1524 | |
---|
1525 | // get number of threads |
---|
1526 | th_nr = hal_remote_lw( XPTR( process_cxy , &process_ptr->th_nr ) ); |
---|
1527 | |
---|
1528 | // get TXT name and process owner |
---|
1529 | txt_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1530 | |
---|
1531 | assert( (txt_file_xp != XPTR_NULL) , __FUNCTION__ , |
---|
1532 | "process must be attached to one TXT terminal\n" ); |
---|
1533 | |
---|
1534 | chdev_xp = chdev_from_file( txt_file_xp ); |
---|
1535 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1536 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
1537 | hal_remote_strcpy( XPTR( local_cxy , txt_name ) , |
---|
1538 | XPTR( chdev_cxy , chdev_ptr->name ) ); |
---|
1539 | owner_xp = (xptr_t)hal_remote_lwd( XPTR( chdev_cxy , &chdev_ptr->ext.txt.owner_xp ) ); |
---|
1540 | |
---|
1541 | // get process .elf name |
---|
1542 | elf_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) ); |
---|
1543 | |
---|
1544 | elf_file_cxy = GET_CXY( elf_file_xp ); |
---|
1545 | elf_file_ptr = (vfs_file_t *)GET_PTR( elf_file_xp ); |
---|
1546 | elf_inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) ); |
---|
1547 | vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name ); |
---|
1548 | |
---|
1549 | // display process info |
---|
1550 | if( owner_xp == process_xp ) |
---|
1551 | { |
---|
1552 | printk("PID %X | PPID %X | STS %X | %s (FG) | %X | %d | %s\n", |
---|
1553 | pid, ppid, state, txt_name, process_ptr, th_nr, elf_name ); |
---|
1554 | } |
---|
1555 | else |
---|
1556 | { |
---|
1557 | printk("PID %X | PPID %X | STS %X | %s (BG) | %X | %d | %s\n", |
---|
1558 | pid, ppid, state, txt_name, process_ptr, th_nr, elf_name ); |
---|
1559 | } |
---|
1560 | } // end process_display() |
---|
1561 | |
---|
1562 | |
---|
1563 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
1564 | // Terminals related functions |
---|
1565 | //////////////////////////////////////////////////////////////////////////////////////// |
---|
1566 | |
---|
1567 | //////////////////////////// |
---|
1568 | uint32_t process_txt_alloc() |
---|
1569 | { |
---|
1570 | uint32_t index; // TXT terminal index |
---|
1571 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1572 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1573 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1574 | xptr_t root_xp; // extended pointer on owner field in chdev |
---|
1575 | |
---|
1576 | // scan the user TXT_RX chdevs (TXT0 is reserved for kernel) |
---|
1577 | for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ ) |
---|
1578 | { |
---|
1579 | // get pointers on TXT_RX[index] |
---|
1580 | chdev_xp = chdev_dir.txt_rx[index]; |
---|
1581 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1582 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
1583 | |
---|
1584 | // get extended pointer on root of attached process |
---|
1585 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1586 | |
---|
1587 | // return free TXT index if found |
---|
1588 | if( xlist_is_empty( root_xp ) ) return index; |
---|
1589 | } |
---|
1590 | |
---|
1591 | assert( false , __FUNCTION__ , "no free TXT terminal found" ); |
---|
1592 | |
---|
1593 | return -1; |
---|
1594 | |
---|
1595 | } // end process_txt_alloc() |
---|
1596 | |
---|
1597 | ///////////////////////////////////////////// |
---|
1598 | void process_txt_attach( process_t * process, |
---|
1599 | uint32_t txt_id ) |
---|
1600 | { |
---|
1601 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1602 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1603 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1604 | xptr_t root_xp; // extended pointer on list root in chdev |
---|
1605 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
1606 | |
---|
1607 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1608 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1609 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1610 | printk("\n[DBG] %s : thread %x enter for process %x / txt_id = %d / cycle %d\n", |
---|
1611 | __FUNCTION__, CURRENT_THREAD, process->pid, txt_id, cycle ); |
---|
1612 | #endif |
---|
1613 | |
---|
1614 | // check process is in owner cluster |
---|
1615 | assert( (CXY_FROM_PID( process->pid ) == local_cxy) , __FUNCTION__ , |
---|
1616 | "process descriptor not in owner cluster" ); |
---|
1617 | |
---|
1618 | // check terminal index |
---|
1619 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
---|
1620 | __FUNCTION__ , "illegal TXT terminal index" ); |
---|
1621 | |
---|
1622 | // get pointers on TXT_RX[txt_id] chdev |
---|
1623 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
---|
1624 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1625 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
1626 | |
---|
1627 | // get extended pointer on root & lock of attached process list |
---|
1628 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1629 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
1630 | |
---|
1631 | // insert process in attached process list |
---|
1632 | remote_spinlock_lock( lock_xp ); |
---|
1633 | xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) ); |
---|
1634 | remote_spinlock_unlock( lock_xp ); |
---|
1635 | |
---|
1636 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1637 | cycle = (uint32_t)hal_get_cycles(); |
---|
1638 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1639 | printk("\n[DBG] %s : thread %x exit for process %x / txt_id = %d / cycle %d\n", |
---|
1640 | __FUNCTION__, CURRENT_THREAD, process->pid, txt_id , cycle ); |
---|
1641 | #endif |
---|
1642 | |
---|
1643 | } // end process_txt_attach() |
---|
1644 | |
---|
1645 | ///////////////////////////////////////////// |
---|
1646 | void process_txt_detach( xptr_t process_xp ) |
---|
1647 | { |
---|
1648 | process_t * process_ptr; // local pointer on process in owner cluster |
---|
1649 | cxy_t process_cxy; // process owner cluster |
---|
1650 | pid_t process_pid; // process identifier |
---|
1651 | xptr_t file_xp; // extended pointer on stdin file |
---|
1652 | xptr_t chdev_xp; // extended pointer on TXT_RX chdev |
---|
1653 | cxy_t chdev_cxy; // TXT_RX chdev cluster |
---|
1654 | chdev_t * chdev_ptr; // local pointer on TXT_RX chdev |
---|
1655 | xptr_t lock_xp; // extended pointer on list lock in chdev |
---|
1656 | |
---|
1657 | // get process cluster, local pointer, and PID |
---|
1658 | process_cxy = GET_CXY( process_xp ); |
---|
1659 | process_ptr = GET_PTR( process_xp ); |
---|
1660 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
1661 | |
---|
1662 | // check process descriptor in owner cluster |
---|
1663 | assert( (CXY_FROM_PID( process_pid ) == process_cxy ) , __FUNCTION__ , |
---|
1664 | "process descriptor not in owner cluster" ); |
---|
1665 | |
---|
1666 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1667 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1668 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1669 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
---|
1670 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
1671 | #endif |
---|
1672 | |
---|
1673 | // release TXT ownership (does nothing if not TXT owner) |
---|
1674 | process_txt_transfer_ownership( process_xp ); |
---|
1675 | |
---|
1676 | // get extended pointer on process stdin file |
---|
1677 | file_xp = (xptr_t)hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1678 | |
---|
1679 | // get pointers on TXT_RX chdev |
---|
1680 | chdev_xp = chdev_from_file( file_xp ); |
---|
1681 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1682 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
---|
1683 | |
---|
1684 | // get extended pointer on lock protecting attached process list |
---|
1685 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
1686 | |
---|
1687 | // unlink process from attached process list |
---|
1688 | remote_spinlock_lock( lock_xp ); |
---|
1689 | xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) ); |
---|
1690 | remote_spinlock_unlock( lock_xp ); |
---|
1691 | |
---|
1692 | #if( CONFIG_DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
1693 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1694 | { |
---|
1695 | xptr_t root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1696 | xptr_t iter_xp; |
---|
1697 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1698 | { |
---|
1699 | xptr_t current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
1700 | process_t * current_ptr = GET_PTR( current_xp ); |
---|
1701 | |
---|
1702 | printk("\n[DBG] %s : attached_process %x (pid = %x)\n", |
---|
1703 | __FUNCTION__, current_ptr, current_ptr->pid ); |
---|
1704 | } |
---|
1705 | } |
---|
1706 | #endif |
---|
1707 | |
---|
1708 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1709 | cycle = (uint32_t)hal_get_cycles(); |
---|
1710 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1711 | printk("\n[DBG] %s : thread %x exit / process %x detached from TXT / cycle %d\n", |
---|
1712 | __FUNCTION__, CURRENT_THREAD, process->pid, cycle ); |
---|
1713 | #endif |
---|
1714 | |
---|
1715 | } // end process_txt_detach() |
---|
1716 | |
---|
1717 | /////////////////////////////////////////////////// |
---|
1718 | void process_txt_set_ownership( xptr_t process_xp ) |
---|
1719 | { |
---|
1720 | process_t * process_ptr; |
---|
1721 | cxy_t process_cxy; |
---|
1722 | pid_t process_pid; |
---|
1723 | xptr_t file_xp; |
---|
1724 | xptr_t txt_xp; |
---|
1725 | chdev_t * txt_ptr; |
---|
1726 | cxy_t txt_cxy; |
---|
1727 | |
---|
1728 | // get pointers on process in owner cluster |
---|
1729 | process_cxy = GET_CXY( process_xp ); |
---|
1730 | process_ptr = GET_PTR( process_xp ); |
---|
1731 | |
---|
1732 | // get process PID |
---|
1733 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
1734 | |
---|
1735 | // check owner cluster |
---|
1736 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , __FUNCTION__, |
---|
1737 | "process descriptor not in owner cluster\n" ); |
---|
1738 | |
---|
1739 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1740 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1741 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1742 | printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n", |
---|
1743 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
1744 | #endif |
---|
1745 | |
---|
1746 | // get extended pointer on stdin pseudo file |
---|
1747 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1748 | |
---|
1749 | // get pointers on TXT chdev |
---|
1750 | txt_xp = chdev_from_file( file_xp ); |
---|
1751 | txt_cxy = GET_CXY( txt_xp ); |
---|
1752 | txt_ptr = GET_PTR( txt_xp ); |
---|
1753 | |
---|
1754 | // set owner field in TXT chdev |
---|
1755 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp ); |
---|
1756 | |
---|
1757 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1758 | cycle = (uint32_t)hal_get_cycles(); |
---|
1759 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1760 | printk("\n[DBG] %s : thread %x exit for process %x / cycle %d\n", |
---|
1761 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
1762 | #endif |
---|
1763 | |
---|
1764 | } // end process_txt_set ownership() |
---|
1765 | |
---|
1766 | //////////////////////////////////////////////////////// |
---|
1767 | void process_txt_transfer_ownership( xptr_t process_xp ) |
---|
1768 | { |
---|
1769 | process_t * process_ptr; // local pointer on process releasing ownership |
---|
1770 | cxy_t process_cxy; // process cluster |
---|
1771 | pid_t process_pid; // process identifier |
---|
1772 | xptr_t file_xp; // extended pointer on TXT_RX pseudo file |
---|
1773 | xptr_t txt_xp; // extended pointer on TXT_RX chdev |
---|
1774 | chdev_t * txt_ptr; // local pointer on TXT_RX chdev |
---|
1775 | cxy_t txt_cxy; // cluster of TXT_RX chdev |
---|
1776 | uint32_t txt_id; // TXT_RX channel |
---|
1777 | xptr_t owner_xp; // extended pointer on current TXT_RX owner |
---|
1778 | xptr_t root_xp; // extended pointer on root of attached process list |
---|
1779 | xptr_t lock_xp; // extended pointer on lock protecting attached process list |
---|
1780 | xptr_t iter_xp; // iterator for xlist |
---|
1781 | xptr_t current_xp; // extended pointer on current process |
---|
1782 | process_t * current_ptr; // local pointer on current process |
---|
1783 | cxy_t current_cxy; // cluster for current process |
---|
1784 | |
---|
1785 | // get pointers on process in owner cluster |
---|
1786 | process_cxy = GET_CXY( process_xp ); |
---|
1787 | process_ptr = GET_PTR( process_xp ); |
---|
1788 | |
---|
1789 | // get process PID |
---|
1790 | process_pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) ); |
---|
1791 | |
---|
1792 | // check owner cluster |
---|
1793 | assert( (process_cxy == CXY_FROM_PID( process_pid )) , __FUNCTION__, |
---|
1794 | "process descriptor not in owner cluster\n" ); |
---|
1795 | |
---|
1796 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1797 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
---|
1798 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1799 | printk("\n[DBG] %s : thread %x enter / process %x / pid %x / cycle %d\n", |
---|
1800 | __FUNCTION__, CURRENT_THREAD, process_ptr, process_pid, cycle ); |
---|
1801 | #endif |
---|
1802 | |
---|
1803 | // get extended pointer on stdin pseudo file |
---|
1804 | file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) ); |
---|
1805 | |
---|
1806 | // get pointers on TXT chdev |
---|
1807 | txt_xp = chdev_from_file( file_xp ); |
---|
1808 | txt_cxy = GET_CXY( txt_xp ); |
---|
1809 | txt_ptr = GET_PTR( txt_xp ); |
---|
1810 | |
---|
1811 | // get extended pointer on TXT_RX owner and TXT channel |
---|
1812 | owner_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) ); |
---|
1813 | txt_id = hal_remote_lw ( XPTR( txt_cxy , &txt_ptr->channel ) ); |
---|
1814 | |
---|
1815 | #if( CONFIG_DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
1816 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1817 | printk("\n[DBG] %s : file_ptr %x / txt_ptr %x / txt_id %d / owner_ptr = %x\n", |
---|
1818 | __FUNCTION__, GET_PTR(file_xp), txt_ptr, txt_id, GET_PTR(owner_xp) ); |
---|
1819 | #endif |
---|
1820 | |
---|
1821 | // transfer ownership only if process is the TXT owner |
---|
1822 | if( (owner_xp == process_xp) && (txt_id > 0) ) |
---|
1823 | { |
---|
1824 | // get extended pointers on root and lock of attached processes list |
---|
1825 | root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root ); |
---|
1826 | lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock ); |
---|
1827 | |
---|
1828 | // get lock |
---|
1829 | remote_spinlock_lock( lock_xp ); |
---|
1830 | |
---|
1831 | if( process_get_ppid( process_xp ) != 1 ) // process is not KSH |
---|
1832 | { |
---|
1833 | |
---|
1834 | #if( CONFIG_DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
1835 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1836 | printk("\n[DBG] %s : process is not the KSH process => search the KSH\n", __FUNCTION__ ); |
---|
1837 | #endif |
---|
1838 | // scan attached process list to find KSH process |
---|
1839 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1840 | { |
---|
1841 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
1842 | current_cxy = GET_CXY( current_xp ); |
---|
1843 | current_ptr = GET_PTR( current_xp ); |
---|
1844 | |
---|
1845 | if( process_get_ppid( current_xp ) == 1 ) // current is KSH |
---|
1846 | { |
---|
1847 | // release lock |
---|
1848 | remote_spinlock_unlock( lock_xp ); |
---|
1849 | |
---|
1850 | // set owner field in TXT chdev |
---|
1851 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
1852 | |
---|
1853 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1854 | cycle = (uint32_t)hal_get_cycles(); |
---|
1855 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1856 | printk("\n[DBG] %s : thread %x exit / process %x to KSH process %x / cycle %d\n", |
---|
1857 | __FUNCTION__, CURRENT_THREAD, process_pid, |
---|
1858 | hal_remote_lw( XPTR( current_cxy , ¤t_ptr->pid ) ), cycle ); |
---|
1859 | #endif |
---|
1860 | return; |
---|
1861 | } |
---|
1862 | } |
---|
1863 | |
---|
1864 | // release lock |
---|
1865 | remote_spinlock_unlock( lock_xp ); |
---|
1866 | |
---|
1867 | // PANIC if KSH not found |
---|
1868 | assert( false , __FUNCTION__ , "KSH process not found for TXT %d" ); |
---|
1869 | |
---|
1870 | return; |
---|
1871 | } |
---|
1872 | else // process is KSH |
---|
1873 | { |
---|
1874 | |
---|
1875 | #if( CONFIG_DEBUG_PROCESS_TXT_ATTACH & 1 ) |
---|
1876 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1877 | printk("\n[DBG] %s : process is the KSH process => search another\n", __FUNCTION__ ); |
---|
1878 | #endif |
---|
1879 | |
---|
1880 | // scan attached process list to find another process |
---|
1881 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1882 | { |
---|
1883 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
1884 | current_cxy = GET_CXY( current_xp ); |
---|
1885 | current_ptr = GET_PTR( current_xp ); |
---|
1886 | |
---|
1887 | if( current_xp != process_xp ) // current is not KSH |
---|
1888 | { |
---|
1889 | // release lock |
---|
1890 | remote_spinlock_unlock( lock_xp ); |
---|
1891 | |
---|
1892 | // set owner field in TXT chdev |
---|
1893 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp ); |
---|
1894 | |
---|
1895 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1896 | cycle = (uint32_t)hal_get_cycles(); |
---|
1897 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1898 | printk("\n[DBG] %s : thread %x exit / KSH process %x to process %x / cycle %d\n", |
---|
1899 | __FUNCTION__, CURRENT_THREAD, process_pid, |
---|
1900 | hal_remote_lw( XPTR( current_cxy , ¤t_ptr->pid ) ), cycle ); |
---|
1901 | #endif |
---|
1902 | return; |
---|
1903 | } |
---|
1904 | } |
---|
1905 | |
---|
1906 | // release lock |
---|
1907 | remote_spinlock_unlock( lock_xp ); |
---|
1908 | |
---|
1909 | // no more owner for TXT if no other process found |
---|
1910 | hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL ); |
---|
1911 | |
---|
1912 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1913 | cycle = (uint32_t)hal_get_cycles(); |
---|
1914 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1915 | printk("\n[DBG] %s : thread %x exit / KSH process %x to nobody / cycle %d\n", |
---|
1916 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
1917 | #endif |
---|
1918 | return; |
---|
1919 | } |
---|
1920 | } |
---|
1921 | else |
---|
1922 | { |
---|
1923 | |
---|
1924 | #if CONFIG_DEBUG_PROCESS_TXT_ATTACH |
---|
1925 | cycle = (uint32_t)hal_get_cycles(); |
---|
1926 | if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle ) |
---|
1927 | printk("\n[DBG] %s : thread %x exit / process %x is not TXT owner / cycle %d\n", |
---|
1928 | __FUNCTION__, CURRENT_THREAD, process_pid, cycle ); |
---|
1929 | #endif |
---|
1930 | |
---|
1931 | } |
---|
1932 | } // end process_txt_transfer_ownership() |
---|
1933 | |
---|
1934 | |
---|
1935 | //////////////////////////////////////////////// |
---|
1936 | xptr_t process_txt_get_owner( uint32_t channel ) |
---|
1937 | { |
---|
1938 | xptr_t txt_rx_xp = chdev_dir.txt_rx[channel]; |
---|
1939 | cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp ); |
---|
1940 | chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp ); |
---|
1941 | |
---|
1942 | return (xptr_t)hal_remote_lwd( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) ); |
---|
1943 | } |
---|
1944 | |
---|
1945 | /////////////////////////////////////////// |
---|
1946 | void process_txt_display( uint32_t txt_id ) |
---|
1947 | { |
---|
1948 | xptr_t chdev_xp; |
---|
1949 | cxy_t chdev_cxy; |
---|
1950 | chdev_t * chdev_ptr; |
---|
1951 | xptr_t root_xp; |
---|
1952 | xptr_t lock_xp; |
---|
1953 | xptr_t current_xp; |
---|
1954 | xptr_t iter_xp; |
---|
1955 | |
---|
1956 | // check terminal index |
---|
1957 | assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) , |
---|
1958 | __FUNCTION__ , "illegal TXT terminal index" ); |
---|
1959 | |
---|
1960 | // get pointers on TXT_RX[txt_id] chdev |
---|
1961 | chdev_xp = chdev_dir.txt_rx[txt_id]; |
---|
1962 | chdev_cxy = GET_CXY( chdev_xp ); |
---|
1963 | chdev_ptr = GET_PTR( chdev_xp ); |
---|
1964 | |
---|
1965 | // get extended pointer on root & lock of attached process list |
---|
1966 | root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root ); |
---|
1967 | lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock ); |
---|
1968 | |
---|
1969 | // display header |
---|
1970 | printk("\n***** processes attached to TXT_%d\n", txt_id ); |
---|
1971 | |
---|
1972 | // get lock |
---|
1973 | remote_spinlock_lock( lock_xp ); |
---|
1974 | |
---|
1975 | // scan attached process list |
---|
1976 | XLIST_FOREACH( root_xp , iter_xp ) |
---|
1977 | { |
---|
1978 | current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list ); |
---|
1979 | process_display( current_xp ); |
---|
1980 | } |
---|
1981 | |
---|
1982 | // release lock |
---|
1983 | remote_spinlock_unlock( lock_xp ); |
---|
1984 | |
---|
1985 | } // end process_txt_display |
---|