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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genericproc |
29 | /** @addtogroup genericproc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief Task management. |
35 | * @brief Task management. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <proc/thread.h> |
38 | #include <proc/thread.h> |
39 | #include <proc/task.h> |
39 | #include <proc/task.h> |
40 | #include <mm/as.h> |
40 | #include <mm/as.h> |
41 | #include <mm/slab.h> |
41 | #include <mm/slab.h> |
42 | #include <atomic.h> |
42 | #include <atomic.h> |
43 | #include <synch/spinlock.h> |
43 | #include <synch/spinlock.h> |
44 | #include <synch/waitq.h> |
44 | #include <synch/waitq.h> |
45 | #include <arch.h> |
45 | #include <arch.h> |
46 | #include <arch/barrier.h> |
46 | #include <arch/barrier.h> |
47 | #include <adt/avl.h> |
47 | #include <adt/avl.h> |
48 | #include <adt/btree.h> |
48 | #include <adt/btree.h> |
49 | #include <adt/list.h> |
49 | #include <adt/list.h> |
50 | #include <ipc/ipc.h> |
50 | #include <ipc/ipc.h> |
51 | #include <ipc/ipcrsc.h> |
51 | #include <ipc/ipcrsc.h> |
52 | #include <print.h> |
52 | #include <print.h> |
53 | #include <errno.h> |
53 | #include <errno.h> |
54 | #include <func.h> |
54 | #include <func.h> |
55 | #include <string.h> |
55 | #include <string.h> |
56 | #include <syscall/copy.h> |
56 | #include <syscall/copy.h> |
- | 57 | #include <macros.h> |
|
- | 58 | #include <ipc/event.h> |
|
57 | 59 | ||
58 | /** Spinlock protecting the tasks_tree AVL tree. */ |
60 | /** Spinlock protecting the tasks_tree AVL tree. */ |
59 | SPINLOCK_INITIALIZE(tasks_lock); |
61 | SPINLOCK_INITIALIZE(tasks_lock); |
60 | 62 | ||
61 | /** AVL tree of active tasks. |
63 | /** AVL tree of active tasks. |
62 | * |
64 | * |
63 | * The task is guaranteed to exist after it was found in the tasks_tree as |
65 | * The task is guaranteed to exist after it was found in the tasks_tree as |
64 | * long as: |
66 | * long as: |
65 | * @li the tasks_lock is held, |
67 | * @li the tasks_lock is held, |
66 | * @li the task's lock is held when task's lock is acquired before releasing |
68 | * @li the task's lock is held when task's lock is acquired before releasing |
67 | * tasks_lock or |
69 | * tasks_lock or |
68 | * @li the task's refcount is greater than 0 |
70 | * @li the task's refcount is greater than 0 |
69 | * |
71 | * |
70 | */ |
72 | */ |
71 | avltree_t tasks_tree; |
73 | avltree_t tasks_tree; |
72 | 74 | ||
73 | static task_id_t task_counter = 0; |
75 | static task_id_t task_counter = 0; |
74 | 76 | ||
75 | /** Initialize kernel tasks support. */ |
77 | /** Initialize kernel tasks support. */ |
76 | void task_init(void) |
78 | void task_init(void) |
77 | { |
79 | { |
78 | TASK = NULL; |
80 | TASK = NULL; |
79 | avltree_create(&tasks_tree); |
81 | avltree_create(&tasks_tree); |
80 | } |
82 | } |
81 | 83 | ||
82 | /* |
84 | /* |
83 | * The idea behind this walker is to remember a single task different from |
85 | * The idea behind this walker is to remember a single task different from |
84 | * TASK. |
86 | * TASK. |
85 | */ |
87 | */ |
86 | static bool task_done_walker(avltree_node_t *node, void *arg) |
88 | static bool task_done_walker(avltree_node_t *node, void *arg) |
87 | { |
89 | { |
88 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
90 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
89 | task_t **tp = (task_t **) arg; |
91 | task_t **tp = (task_t **) arg; |
90 | 92 | ||
91 | if (t != TASK) { |
93 | if (t != TASK) { |
92 | *tp = t; |
94 | *tp = t; |
93 | return false; /* stop walking */ |
95 | return false; /* stop walking */ |
94 | } |
96 | } |
95 | 97 | ||
96 | return true; /* continue the walk */ |
98 | return true; /* continue the walk */ |
97 | } |
99 | } |
98 | 100 | ||
99 | /** Kill all tasks except the current task. */ |
101 | /** Kill all tasks except the current task. */ |
100 | void task_done(void) |
102 | void task_done(void) |
101 | { |
103 | { |
102 | task_t *t; |
104 | task_t *t; |
103 | do { /* Repeat until there are any tasks except TASK */ |
105 | do { /* Repeat until there are any tasks except TASK */ |
104 | 106 | ||
105 | /* Messing with task structures, avoid deadlock */ |
107 | /* Messing with task structures, avoid deadlock */ |
106 | ipl_t ipl = interrupts_disable(); |
108 | ipl_t ipl = interrupts_disable(); |
107 | spinlock_lock(&tasks_lock); |
109 | spinlock_lock(&tasks_lock); |
108 | 110 | ||
109 | t = NULL; |
111 | t = NULL; |
110 | avltree_walk(&tasks_tree, task_done_walker, &t); |
112 | avltree_walk(&tasks_tree, task_done_walker, &t); |
111 | 113 | ||
112 | if (t != NULL) { |
114 | if (t != NULL) { |
113 | task_id_t id = t->taskid; |
115 | task_id_t id = t->taskid; |
114 | 116 | ||
115 | spinlock_unlock(&tasks_lock); |
117 | spinlock_unlock(&tasks_lock); |
116 | interrupts_restore(ipl); |
118 | interrupts_restore(ipl); |
117 | 119 | ||
118 | #ifdef CONFIG_DEBUG |
120 | #ifdef CONFIG_DEBUG |
119 | printf("Killing task %" PRIu64 "\n", id); |
121 | printf("Killing task %" PRIu64 "\n", id); |
120 | #endif |
122 | #endif |
121 | task_kill(id); |
123 | task_kill(id); |
122 | thread_usleep(10000); |
124 | thread_usleep(10000); |
123 | } else { |
125 | } else { |
124 | spinlock_unlock(&tasks_lock); |
126 | spinlock_unlock(&tasks_lock); |
125 | interrupts_restore(ipl); |
127 | interrupts_restore(ipl); |
126 | } |
128 | } |
127 | 129 | ||
128 | } while (t != NULL); |
130 | } while (t != NULL); |
129 | } |
131 | } |
130 | 132 | ||
131 | /** Create new task with no threads. |
133 | /** Create new task with no threads. |
132 | * |
134 | * |
133 | * @param as Task's address space. |
135 | * @param as Task's address space. |
134 | * @param name Symbolic name (a copy is made). |
136 | * @param name Symbolic name (a copy is made). |
135 | * |
137 | * |
136 | * @return New task's structure. |
138 | * @return New task's structure. |
137 | * |
139 | * |
138 | */ |
140 | */ |
139 | task_t *task_create(as_t *as, char *name) |
141 | task_t *task_create(as_t *as, char *name) |
140 | { |
142 | { |
141 | ipl_t ipl; |
143 | ipl_t ipl; |
142 | task_t *ta; |
144 | task_t *ta; |
143 | int i; |
145 | int i; |
144 | 146 | ||
145 | ta = (task_t *) malloc(sizeof(task_t), 0); |
147 | ta = (task_t *) malloc(sizeof(task_t), 0); |
146 | 148 | ||
147 | task_create_arch(ta); |
149 | task_create_arch(ta); |
148 | 150 | ||
149 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
151 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
150 | list_initialize(&ta->th_head); |
152 | list_initialize(&ta->th_head); |
151 | ta->as = as; |
153 | ta->as = as; |
152 | 154 | ||
153 | memcpy(ta->name, name, TASK_NAME_BUFLEN); |
155 | memcpy(ta->name, name, TASK_NAME_BUFLEN); |
154 | ta->name[TASK_NAME_BUFLEN - 1] = 0; |
156 | ta->name[TASK_NAME_BUFLEN - 1] = 0; |
155 | 157 | ||
156 | atomic_set(&ta->refcount, 0); |
158 | atomic_set(&ta->refcount, 0); |
157 | atomic_set(&ta->lifecount, 0); |
159 | atomic_set(&ta->lifecount, 0); |
158 | ta->context = CONTEXT; |
160 | ta->context = CONTEXT; |
159 | 161 | ||
160 | ta->capabilities = 0; |
162 | ta->capabilities = 0; |
161 | ta->cycles = 0; |
163 | ta->cycles = 0; |
162 | 164 | ||
163 | #ifdef CONFIG_UDEBUG |
165 | #ifdef CONFIG_UDEBUG |
164 | /* Init debugging stuff */ |
166 | /* Init debugging stuff */ |
165 | udebug_task_init(&ta->udebug); |
167 | udebug_task_init(&ta->udebug); |
166 | 168 | ||
167 | /* Init kbox stuff */ |
169 | /* Init kbox stuff */ |
168 | ipc_answerbox_init(&ta->kb.box, ta); |
170 | ipc_answerbox_init(&ta->kb.box, ta); |
169 | ta->kb.thread = NULL; |
171 | ta->kb.thread = NULL; |
170 | mutex_initialize(&ta->kb.cleanup_lock, MUTEX_PASSIVE); |
172 | mutex_initialize(&ta->kb.cleanup_lock, MUTEX_PASSIVE); |
171 | ta->kb.finished = false; |
173 | ta->kb.finished = false; |
172 | #endif |
174 | #endif |
173 | 175 | ||
174 | ipc_answerbox_init(&ta->answerbox, ta); |
176 | ipc_answerbox_init(&ta->answerbox, ta); |
175 | for (i = 0; i < IPC_MAX_PHONES; i++) |
177 | for (i = 0; i < IPC_MAX_PHONES; i++) |
176 | ipc_phone_init(&ta->phones[i]); |
178 | ipc_phone_init(&ta->phones[i]); |
177 | if ((ipc_phone_0) && (context_check(ipc_phone_0->task->context, |
179 | if ((ipc_phone_0) && (context_check(ipc_phone_0->task->context, |
178 | ta->context))) |
180 | ta->context))) |
179 | ipc_phone_connect(&ta->phones[0], ipc_phone_0); |
181 | ipc_phone_connect(&ta->phones[0], ipc_phone_0); |
180 | atomic_set(&ta->active_calls, 0); |
182 | atomic_set(&ta->active_calls, 0); |
181 | 183 | ||
182 | mutex_initialize(&ta->futexes_lock, MUTEX_PASSIVE); |
184 | mutex_initialize(&ta->futexes_lock, MUTEX_PASSIVE); |
183 | btree_create(&ta->futexes); |
185 | btree_create(&ta->futexes); |
184 | 186 | ||
185 | ipl = interrupts_disable(); |
187 | ipl = interrupts_disable(); |
186 | 188 | ||
187 | /* |
189 | /* |
188 | * Increment address space reference count. |
190 | * Increment address space reference count. |
189 | */ |
191 | */ |
190 | atomic_inc(&as->refcount); |
192 | atomic_inc(&as->refcount); |
191 | 193 | ||
192 | spinlock_lock(&tasks_lock); |
194 | spinlock_lock(&tasks_lock); |
193 | ta->taskid = ++task_counter; |
195 | ta->taskid = ++task_counter; |
194 | avltree_node_initialize(&ta->tasks_tree_node); |
196 | avltree_node_initialize(&ta->tasks_tree_node); |
195 | ta->tasks_tree_node.key = ta->taskid; |
197 | ta->tasks_tree_node.key = ta->taskid; |
196 | avltree_insert(&tasks_tree, &ta->tasks_tree_node); |
198 | avltree_insert(&tasks_tree, &ta->tasks_tree_node); |
197 | spinlock_unlock(&tasks_lock); |
199 | spinlock_unlock(&tasks_lock); |
198 | interrupts_restore(ipl); |
200 | interrupts_restore(ipl); |
199 | 201 | ||
- | 202 | /* |
|
- | 203 | * Notify about task creation. |
|
- | 204 | */ |
|
- | 205 | if (event_is_subscribed(EVENT_WAIT)) |
|
- | 206 | event_notify_3(EVENT_WAIT, TASK_CREATE, LOWER32(ta->taskid), |
|
- | 207 | UPPER32(ta->taskid)); |
|
- | 208 | ||
200 | return ta; |
209 | return ta; |
201 | } |
210 | } |
202 | 211 | ||
203 | /** Destroy task. |
212 | /** Destroy task. |
204 | * |
213 | * |
205 | * @param t Task to be destroyed. |
214 | * @param t Task to be destroyed. |
206 | */ |
215 | */ |
207 | void task_destroy(task_t *t) |
216 | void task_destroy(task_t *t) |
208 | { |
217 | { |
209 | /* |
218 | /* |
210 | * Remove the task from the task B+tree. |
219 | * Remove the task from the task B+tree. |
211 | */ |
220 | */ |
212 | spinlock_lock(&tasks_lock); |
221 | spinlock_lock(&tasks_lock); |
213 | avltree_delete(&tasks_tree, &t->tasks_tree_node); |
222 | avltree_delete(&tasks_tree, &t->tasks_tree_node); |
214 | spinlock_unlock(&tasks_lock); |
223 | spinlock_unlock(&tasks_lock); |
215 | 224 | ||
216 | /* |
225 | /* |
217 | * Perform architecture specific task destruction. |
226 | * Perform architecture specific task destruction. |
218 | */ |
227 | */ |
219 | task_destroy_arch(t); |
228 | task_destroy_arch(t); |
220 | 229 | ||
221 | /* |
230 | /* |
222 | * Free up dynamically allocated state. |
231 | * Free up dynamically allocated state. |
223 | */ |
232 | */ |
224 | btree_destroy(&t->futexes); |
233 | btree_destroy(&t->futexes); |
225 | 234 | ||
226 | /* |
235 | /* |
227 | * Drop our reference to the address space. |
236 | * Drop our reference to the address space. |
228 | */ |
237 | */ |
229 | if (atomic_predec(&t->as->refcount) == 0) |
238 | if (atomic_predec(&t->as->refcount) == 0) |
230 | as_destroy(t->as); |
239 | as_destroy(t->as); |
231 | 240 | ||
- | 241 | /* |
|
- | 242 | * Notify about task destruction. |
|
- | 243 | */ |
|
- | 244 | if (event_is_subscribed(EVENT_WAIT)) |
|
- | 245 | event_notify_3(EVENT_WAIT, TASK_DESTROY, LOWER32(t->taskid), |
|
- | 246 | UPPER32(t->taskid)); |
|
- | 247 | ||
232 | free(t); |
248 | free(t); |
233 | TASK = NULL; |
249 | TASK = NULL; |
234 | } |
250 | } |
235 | 251 | ||
236 | /** Syscall for reading task ID from userspace. |
252 | /** Syscall for reading task ID from userspace. |
237 | * |
253 | * |
238 | * @param uspace_task_id userspace address of 8-byte buffer |
254 | * @param uspace_task_id userspace address of 8-byte buffer |
239 | * where to store current task ID. |
255 | * where to store current task ID. |
240 | * |
256 | * |
241 | * @return Zero on success or an error code from @ref errno.h. |
257 | * @return Zero on success or an error code from @ref errno.h. |
242 | */ |
258 | */ |
243 | unative_t sys_task_get_id(task_id_t *uspace_task_id) |
259 | unative_t sys_task_get_id(task_id_t *uspace_task_id) |
244 | { |
260 | { |
245 | /* |
261 | /* |
246 | * No need to acquire lock on TASK because taskid remains constant for |
262 | * No need to acquire lock on TASK because taskid remains constant for |
247 | * the lifespan of the task. |
263 | * the lifespan of the task. |
248 | */ |
264 | */ |
249 | return (unative_t) copy_to_uspace(uspace_task_id, &TASK->taskid, |
265 | return (unative_t) copy_to_uspace(uspace_task_id, &TASK->taskid, |
250 | sizeof(TASK->taskid)); |
266 | sizeof(TASK->taskid)); |
251 | } |
267 | } |
252 | 268 | ||
253 | /** Syscall for setting the task name. |
269 | /** Syscall for setting the task name. |
254 | * |
270 | * |
255 | * The name simplifies identifying the task in the task list. |
271 | * The name simplifies identifying the task in the task list. |
256 | * |
272 | * |
257 | * @param name The new name for the task. (typically the same |
273 | * @param name The new name for the task. (typically the same |
258 | * as the command used to execute it). |
274 | * as the command used to execute it). |
259 | * |
275 | * |
260 | * @return 0 on success or an error code from @ref errno.h. |
276 | * @return 0 on success or an error code from @ref errno.h. |
261 | */ |
277 | */ |
262 | unative_t sys_task_set_name(const char *uspace_name, size_t name_len) |
278 | unative_t sys_task_set_name(const char *uspace_name, size_t name_len) |
263 | { |
279 | { |
264 | int rc; |
280 | int rc; |
265 | char namebuf[TASK_NAME_BUFLEN]; |
281 | char namebuf[TASK_NAME_BUFLEN]; |
266 | 282 | ||
267 | /* Cap length of name and copy it from userspace. */ |
283 | /* Cap length of name and copy it from userspace. */ |
268 | 284 | ||
269 | if (name_len > TASK_NAME_BUFLEN - 1) |
285 | if (name_len > TASK_NAME_BUFLEN - 1) |
270 | name_len = TASK_NAME_BUFLEN - 1; |
286 | name_len = TASK_NAME_BUFLEN - 1; |
271 | 287 | ||
272 | rc = copy_from_uspace(namebuf, uspace_name, name_len); |
288 | rc = copy_from_uspace(namebuf, uspace_name, name_len); |
273 | if (rc != 0) |
289 | if (rc != 0) |
274 | return (unative_t) rc; |
290 | return (unative_t) rc; |
275 | 291 | ||
276 | namebuf[name_len] = '\0'; |
292 | namebuf[name_len] = '\0'; |
277 | str_cpy(TASK->name, TASK_NAME_BUFLEN, namebuf); |
293 | str_cpy(TASK->name, TASK_NAME_BUFLEN, namebuf); |
278 | 294 | ||
279 | return EOK; |
295 | return EOK; |
280 | } |
296 | } |
281 | 297 | ||
282 | /** Find task structure corresponding to task ID. |
298 | /** Find task structure corresponding to task ID. |
283 | * |
299 | * |
284 | * The tasks_lock must be already held by the caller of this function and |
300 | * The tasks_lock must be already held by the caller of this function and |
285 | * interrupts must be disabled. |
301 | * interrupts must be disabled. |
286 | * |
302 | * |
287 | * @param id Task ID. |
303 | * @param id Task ID. |
288 | * |
304 | * |
289 | * @return Task structure address or NULL if there is no such task |
305 | * @return Task structure address or NULL if there is no such task |
290 | * ID. |
306 | * ID. |
291 | */ |
307 | */ |
292 | task_t *task_find_by_id(task_id_t id) { avltree_node_t *node; |
308 | task_t *task_find_by_id(task_id_t id) { avltree_node_t *node; |
293 | 309 | ||
294 | node = avltree_search(&tasks_tree, (avltree_key_t) id); |
310 | node = avltree_search(&tasks_tree, (avltree_key_t) id); |
295 | 311 | ||
296 | if (node) |
312 | if (node) |
297 | return avltree_get_instance(node, task_t, tasks_tree_node); |
313 | return avltree_get_instance(node, task_t, tasks_tree_node); |
298 | return NULL; |
314 | return NULL; |
299 | } |
315 | } |
300 | 316 | ||
301 | /** Get accounting data of given task. |
317 | /** Get accounting data of given task. |
302 | * |
318 | * |
303 | * Note that task lock of 't' must be already held and interrupts must be |
319 | * Note that task lock of 't' must be already held and interrupts must be |
304 | * already disabled. |
320 | * already disabled. |
305 | * |
321 | * |
306 | * @param t Pointer to thread. |
322 | * @param t Pointer to thread. |
307 | * |
323 | * |
308 | * @return Number of cycles used by the task and all its threads |
324 | * @return Number of cycles used by the task and all its threads |
309 | * so far. |
325 | * so far. |
310 | */ |
326 | */ |
311 | uint64_t task_get_accounting(task_t *t) |
327 | uint64_t task_get_accounting(task_t *t) |
312 | { |
328 | { |
313 | /* Accumulated value of task */ |
329 | /* Accumulated value of task */ |
314 | uint64_t ret = t->cycles; |
330 | uint64_t ret = t->cycles; |
315 | 331 | ||
316 | /* Current values of threads */ |
332 | /* Current values of threads */ |
317 | link_t *cur; |
333 | link_t *cur; |
318 | for (cur = t->th_head.next; cur != &t->th_head; cur = cur->next) { |
334 | for (cur = t->th_head.next; cur != &t->th_head; cur = cur->next) { |
319 | thread_t *thr = list_get_instance(cur, thread_t, th_link); |
335 | thread_t *thr = list_get_instance(cur, thread_t, th_link); |
320 | 336 | ||
321 | spinlock_lock(&thr->lock); |
337 | spinlock_lock(&thr->lock); |
322 | /* Process only counted threads */ |
338 | /* Process only counted threads */ |
323 | if (!thr->uncounted) { |
339 | if (!thr->uncounted) { |
324 | if (thr == THREAD) { |
340 | if (thr == THREAD) { |
325 | /* Update accounting of current thread */ |
341 | /* Update accounting of current thread */ |
326 | thread_update_accounting(); |
342 | thread_update_accounting(); |
327 | } |
343 | } |
328 | ret += thr->cycles; |
344 | ret += thr->cycles; |
329 | } |
345 | } |
330 | spinlock_unlock(&thr->lock); |
346 | spinlock_unlock(&thr->lock); |
331 | } |
347 | } |
332 | 348 | ||
333 | return ret; |
349 | return ret; |
334 | } |
350 | } |
335 | 351 | ||
336 | /** Kill task. |
352 | /** Kill task. |
337 | * |
353 | * |
338 | * This function is idempotent. |
354 | * This function is idempotent. |
339 | * It signals all the task's threads to bail it out. |
355 | * It signals all the task's threads to bail it out. |
340 | * |
356 | * |
341 | * @param id ID of the task to be killed. |
357 | * @param id ID of the task to be killed. |
342 | * |
358 | * |
343 | * @return Zero on success or an error code from errno.h. |
359 | * @return Zero on success or an error code from errno.h. |
344 | */ |
360 | */ |
345 | int task_kill(task_id_t id) |
361 | int task_kill(task_id_t id) |
346 | { |
362 | { |
347 | ipl_t ipl; |
363 | ipl_t ipl; |
348 | task_t *ta; |
364 | task_t *ta; |
349 | link_t *cur; |
365 | link_t *cur; |
350 | 366 | ||
351 | if (id == 1) |
367 | if (id == 1) |
352 | return EPERM; |
368 | return EPERM; |
353 | 369 | ||
354 | ipl = interrupts_disable(); |
370 | ipl = interrupts_disable(); |
355 | spinlock_lock(&tasks_lock); |
371 | spinlock_lock(&tasks_lock); |
356 | if (!(ta = task_find_by_id(id))) { |
372 | if (!(ta = task_find_by_id(id))) { |
357 | spinlock_unlock(&tasks_lock); |
373 | spinlock_unlock(&tasks_lock); |
358 | interrupts_restore(ipl); |
374 | interrupts_restore(ipl); |
359 | return ENOENT; |
375 | return ENOENT; |
360 | } |
376 | } |
361 | spinlock_unlock(&tasks_lock); |
377 | spinlock_unlock(&tasks_lock); |
362 | 378 | ||
363 | /* |
379 | /* |
364 | * Interrupt all threads. |
380 | * Interrupt all threads. |
365 | */ |
381 | */ |
366 | spinlock_lock(&ta->lock); |
382 | spinlock_lock(&ta->lock); |
367 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
383 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
368 | thread_t *thr; |
384 | thread_t *thr; |
369 | bool sleeping = false; |
385 | bool sleeping = false; |
370 | 386 | ||
371 | thr = list_get_instance(cur, thread_t, th_link); |
387 | thr = list_get_instance(cur, thread_t, th_link); |
372 | 388 | ||
373 | spinlock_lock(&thr->lock); |
389 | spinlock_lock(&thr->lock); |
374 | thr->interrupted = true; |
390 | thr->interrupted = true; |
375 | if (thr->state == Sleeping) |
391 | if (thr->state == Sleeping) |
376 | sleeping = true; |
392 | sleeping = true; |
377 | spinlock_unlock(&thr->lock); |
393 | spinlock_unlock(&thr->lock); |
378 | 394 | ||
379 | if (sleeping) |
395 | if (sleeping) |
380 | waitq_interrupt_sleep(thr); |
396 | waitq_interrupt_sleep(thr); |
381 | } |
397 | } |
382 | spinlock_unlock(&ta->lock); |
398 | spinlock_unlock(&ta->lock); |
383 | interrupts_restore(ipl); |
399 | interrupts_restore(ipl); |
384 | 400 | ||
385 | return 0; |
401 | return 0; |
386 | } |
402 | } |
387 | 403 | ||
388 | static bool task_print_walker(avltree_node_t *node, void *arg) |
404 | static bool task_print_walker(avltree_node_t *node, void *arg) |
389 | { |
405 | { |
390 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
406 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
391 | int j; |
407 | int j; |
392 | 408 | ||
393 | spinlock_lock(&t->lock); |
409 | spinlock_lock(&t->lock); |
394 | 410 | ||
395 | uint64_t cycles; |
411 | uint64_t cycles; |
396 | char suffix; |
412 | char suffix; |
397 | order(task_get_accounting(t), &cycles, &suffix); |
413 | order(task_get_accounting(t), &cycles, &suffix); |
398 | 414 | ||
399 | #ifdef __32_BITS__ |
415 | #ifdef __32_BITS__ |
400 | printf("%-6" PRIu64 " %-12s %-3" PRIu32 " %10p %10p %9" PRIu64 |
416 | printf("%-6" PRIu64 " %-12s %-3" PRIu32 " %10p %10p %9" PRIu64 |
401 | "%c %7ld %6ld", t->taskid, t->name, t->context, t, t->as, cycles, |
417 | "%c %7ld %6ld", t->taskid, t->name, t->context, t, t->as, cycles, |
402 | suffix, atomic_get(&t->refcount), atomic_get(&t->active_calls)); |
418 | suffix, atomic_get(&t->refcount), atomic_get(&t->active_calls)); |
403 | #endif |
419 | #endif |
404 | 420 | ||
405 | #ifdef __64_BITS__ |
421 | #ifdef __64_BITS__ |
406 | printf("%-6" PRIu64 " %-12s %-3" PRIu32 " %18p %18p %9" PRIu64 |
422 | printf("%-6" PRIu64 " %-12s %-3" PRIu32 " %18p %18p %9" PRIu64 |
407 | "%c %7ld %6ld", t->taskid, t->name, t->context, t, t->as, cycles, |
423 | "%c %7ld %6ld", t->taskid, t->name, t->context, t, t->as, cycles, |
408 | suffix, atomic_get(&t->refcount), atomic_get(&t->active_calls)); |
424 | suffix, atomic_get(&t->refcount), atomic_get(&t->active_calls)); |
409 | #endif |
425 | #endif |
410 | 426 | ||
411 | for (j = 0; j < IPC_MAX_PHONES; j++) { |
427 | for (j = 0; j < IPC_MAX_PHONES; j++) { |
412 | if (t->phones[j].callee) |
428 | if (t->phones[j].callee) |
413 | printf(" %d:%p", j, t->phones[j].callee); |
429 | printf(" %d:%p", j, t->phones[j].callee); |
414 | } |
430 | } |
415 | printf("\n"); |
431 | printf("\n"); |
416 | 432 | ||
417 | spinlock_unlock(&t->lock); |
433 | spinlock_unlock(&t->lock); |
418 | return true; |
434 | return true; |
419 | } |
435 | } |
420 | 436 | ||
421 | /** Print task list */ |
437 | /** Print task list */ |
422 | void task_print_list(void) |
438 | void task_print_list(void) |
423 | { |
439 | { |
424 | ipl_t ipl; |
440 | ipl_t ipl; |
425 | 441 | ||
426 | /* Messing with task structures, avoid deadlock */ |
442 | /* Messing with task structures, avoid deadlock */ |
427 | ipl = interrupts_disable(); |
443 | ipl = interrupts_disable(); |
428 | spinlock_lock(&tasks_lock); |
444 | spinlock_lock(&tasks_lock); |
429 | 445 | ||
430 | #ifdef __32_BITS__ |
446 | #ifdef __32_BITS__ |
431 | printf("taskid name ctx address as " |
447 | printf("taskid name ctx address as " |
432 | "cycles threads calls callee\n"); |
448 | "cycles threads calls callee\n"); |
433 | printf("------ ------------ --- ---------- ---------- " |
449 | printf("------ ------------ --- ---------- ---------- " |
434 | "---------- ------- ------ ------>\n"); |
450 | "---------- ------- ------ ------>\n"); |
435 | #endif |
451 | #endif |
436 | 452 | ||
437 | #ifdef __64_BITS__ |
453 | #ifdef __64_BITS__ |
438 | printf("taskid name ctx address as " |
454 | printf("taskid name ctx address as " |
439 | "cycles threads calls callee\n"); |
455 | "cycles threads calls callee\n"); |
440 | printf("------ ------------ --- ------------------ ------------------ " |
456 | printf("------ ------------ --- ------------------ ------------------ " |
441 | "---------- ------- ------ ------>\n"); |
457 | "---------- ------- ------ ------>\n"); |
442 | #endif |
458 | #endif |
443 | 459 | ||
444 | avltree_walk(&tasks_tree, task_print_walker, NULL); |
460 | avltree_walk(&tasks_tree, task_print_walker, NULL); |
445 | 461 | ||
446 | spinlock_unlock(&tasks_lock); |
462 | spinlock_unlock(&tasks_lock); |
447 | interrupts_restore(ipl); |
463 | interrupts_restore(ipl); |
448 | } |
464 | } |
449 | 465 | ||
450 | /** @} |
466 | /** @} |
451 | */ |
467 | */ |
452 | 468 |