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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 | /** |
29 | /** |
30 | * @file task.c |
30 | * @file task.c |
31 | * @brief Task management. |
31 | * @brief Task management. |
32 | */ |
32 | */ |
33 | 33 | ||
34 | #include <main/uinit.h> |
34 | #include <main/uinit.h> |
35 | #include <proc/thread.h> |
35 | #include <proc/thread.h> |
36 | #include <proc/task.h> |
36 | #include <proc/task.h> |
37 | #include <proc/uarg.h> |
37 | #include <proc/uarg.h> |
38 | #include <mm/as.h> |
38 | #include <mm/as.h> |
39 | #include <mm/slab.h> |
39 | #include <mm/slab.h> |
40 | #include <synch/spinlock.h> |
40 | #include <synch/spinlock.h> |
41 | #include <arch.h> |
41 | #include <arch.h> |
42 | #include <panic.h> |
42 | #include <panic.h> |
43 | #include <adt/btree.h> |
43 | #include <adt/btree.h> |
44 | #include <adt/list.h> |
44 | #include <adt/list.h> |
45 | #include <ipc/ipc.h> |
45 | #include <ipc/ipc.h> |
46 | #include <security/cap.h> |
46 | #include <security/cap.h> |
47 | #include <memstr.h> |
47 | #include <memstr.h> |
48 | #include <print.h> |
48 | #include <print.h> |
49 | #include <elf.h> |
49 | #include <elf.h> |
50 | #include <errno.h> |
50 | #include <errno.h> |
51 | #include <syscall/copy.h> |
51 | #include <syscall/copy.h> |
52 | 52 | ||
53 | #ifndef LOADED_PROG_STACK_PAGES_NO |
53 | #ifndef LOADED_PROG_STACK_PAGES_NO |
54 | #define LOADED_PROG_STACK_PAGES_NO 1 |
54 | #define LOADED_PROG_STACK_PAGES_NO 1 |
55 | #endif |
55 | #endif |
56 | 56 | ||
57 | SPINLOCK_INITIALIZE(tasks_lock); |
57 | SPINLOCK_INITIALIZE(tasks_lock); |
58 | btree_t tasks_btree; |
58 | btree_t tasks_btree; |
59 | static task_id_t task_counter = 0; |
59 | static task_id_t task_counter = 0; |
60 | 60 | ||
61 | static void ktaskclnp(void *arg); |
61 | static void ktaskclnp(void *arg); |
62 | static void ktaskkill(void *arg); |
62 | static void ktaskkill(void *arg); |
63 | 63 | ||
64 | /** Initialize tasks |
64 | /** Initialize tasks |
65 | * |
65 | * |
66 | * Initialize kernel tasks support. |
66 | * Initialize kernel tasks support. |
67 | * |
67 | * |
68 | */ |
68 | */ |
69 | void task_init(void) |
69 | void task_init(void) |
70 | { |
70 | { |
71 | TASK = NULL; |
71 | TASK = NULL; |
72 | btree_create(&tasks_btree); |
72 | btree_create(&tasks_btree); |
73 | } |
73 | } |
74 | 74 | ||
75 | 75 | ||
76 | /** Create new task |
76 | /** Create new task |
77 | * |
77 | * |
78 | * Create new task with no threads. |
78 | * Create new task with no threads. |
79 | * |
79 | * |
80 | * @param as Task's address space. |
80 | * @param as Task's address space. |
81 | * @param name Symbolic name. |
81 | * @param name Symbolic name. |
82 | * |
82 | * |
83 | * @return New task's structure |
83 | * @return New task's structure |
84 | * |
84 | * |
85 | */ |
85 | */ |
86 | task_t *task_create(as_t *as, char *name) |
86 | task_t *task_create(as_t *as, char *name) |
87 | { |
87 | { |
88 | ipl_t ipl; |
88 | ipl_t ipl; |
89 | task_t *ta; |
89 | task_t *ta; |
90 | int i; |
90 | int i; |
91 | 91 | ||
92 | ta = (task_t *) malloc(sizeof(task_t), 0); |
92 | ta = (task_t *) malloc(sizeof(task_t), 0); |
93 | 93 | ||
94 | task_create_arch(ta); |
94 | task_create_arch(ta); |
95 | 95 | ||
96 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
96 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
97 | list_initialize(&ta->th_head); |
97 | list_initialize(&ta->th_head); |
98 | ta->as = as; |
98 | ta->as = as; |
99 | ta->name = name; |
99 | ta->name = name; |
100 | ta->main_thread = NULL; |
100 | ta->main_thread = NULL; |
101 | ta->refcount = 0; |
101 | ta->refcount = 0; |
102 | 102 | ||
103 | ta->capabilities = 0; |
103 | ta->capabilities = 0; |
104 | ta->accept_new_threads = true; |
104 | ta->accept_new_threads = true; |
105 | 105 | ||
106 | ipc_answerbox_init(&ta->answerbox); |
106 | ipc_answerbox_init(&ta->answerbox); |
107 | for (i=0; i < IPC_MAX_PHONES;i++) |
107 | for (i=0; i < IPC_MAX_PHONES;i++) |
108 | ipc_phone_init(&ta->phones[i]); |
108 | ipc_phone_init(&ta->phones[i]); |
109 | if (ipc_phone_0) |
109 | if (ipc_phone_0) |
110 | ipc_phone_connect(&ta->phones[0], ipc_phone_0); |
110 | ipc_phone_connect(&ta->phones[0], ipc_phone_0); |
111 | atomic_set(&ta->active_calls, 0); |
111 | atomic_set(&ta->active_calls, 0); |
112 | 112 | ||
113 | mutex_initialize(&ta->futexes_lock); |
113 | mutex_initialize(&ta->futexes_lock); |
114 | btree_create(&ta->futexes); |
114 | btree_create(&ta->futexes); |
115 | 115 | ||
116 | ipl = interrupts_disable(); |
116 | ipl = interrupts_disable(); |
117 | 117 | ||
118 | /* |
118 | /* |
119 | * Increment address space reference count. |
119 | * Increment address space reference count. |
120 | * TODO: Reconsider the locking scheme. |
120 | * TODO: Reconsider the locking scheme. |
121 | */ |
121 | */ |
122 | mutex_lock(&as->lock); |
122 | mutex_lock(&as->lock); |
123 | as->refcount++; |
123 | as->refcount++; |
124 | mutex_unlock(&as->lock); |
124 | mutex_unlock(&as->lock); |
125 | 125 | ||
126 | spinlock_lock(&tasks_lock); |
126 | spinlock_lock(&tasks_lock); |
127 | 127 | ||
128 | ta->taskid = ++task_counter; |
128 | ta->taskid = ++task_counter; |
129 | btree_insert(&tasks_btree, (btree_key_t) ta->taskid, (void *) ta, NULL); |
129 | btree_insert(&tasks_btree, (btree_key_t) ta->taskid, (void *) ta, NULL); |
130 | 130 | ||
131 | spinlock_unlock(&tasks_lock); |
131 | spinlock_unlock(&tasks_lock); |
132 | interrupts_restore(ipl); |
132 | interrupts_restore(ipl); |
133 | 133 | ||
134 | return ta; |
134 | return ta; |
135 | } |
135 | } |
136 | 136 | ||
137 | /** Destroy task. |
137 | /** Destroy task. |
138 | * |
138 | * |
139 | * @param t Task to be destroyed. |
139 | * @param t Task to be destroyed. |
140 | */ |
140 | */ |
141 | void task_destroy(task_t *t) |
141 | void task_destroy(task_t *t) |
142 | { |
142 | { |
143 | task_destroy_arch(t); |
143 | task_destroy_arch(t); |
144 | btree_destroy(&t->futexes); |
144 | btree_destroy(&t->futexes); |
145 | 145 | ||
146 | mutex_lock_active(&t->as->lock); |
146 | mutex_lock_active(&t->as->lock); |
147 | if (--t->as->refcount == 0) { |
147 | if (--t->as->refcount == 0) { |
148 | mutex_unlock(&t->as->lock); |
148 | mutex_unlock(&t->as->lock); |
149 | as_destroy(t->as); |
149 | as_destroy(t->as); |
150 | /* |
150 | /* |
151 | * t->as is destroyed. |
151 | * t->as is destroyed. |
152 | */ |
152 | */ |
153 | } else { |
153 | } else { |
154 | mutex_unlock(&t->as->lock); |
154 | mutex_unlock(&t->as->lock); |
155 | } |
155 | } |
156 | 156 | ||
157 | free(t); |
157 | free(t); |
158 | TASK = NULL; |
158 | TASK = NULL; |
159 | } |
159 | } |
160 | 160 | ||
161 | /** Create new task with 1 thread and run it |
161 | /** Create new task with 1 thread and run it |
162 | * |
162 | * |
163 | * @param program_addr Address of program executable image. |
163 | * @param program_addr Address of program executable image. |
164 | * @param name Program name. |
164 | * @param name Program name. |
165 | * |
165 | * |
166 | * @return Task of the running program or NULL on error. |
166 | * @return Task of the running program or NULL on error. |
167 | */ |
167 | */ |
168 | task_t * task_run_program(void *program_addr, char *name) |
168 | task_t * task_run_program(void *program_addr, char *name) |
169 | { |
169 | { |
170 | as_t *as; |
170 | as_t *as; |
171 | as_area_t *a; |
171 | as_area_t *a; |
172 | int rc; |
172 | int rc; |
173 | thread_t *t1, *t2; |
173 | thread_t *t1, *t2; |
174 | task_t *task; |
174 | task_t *task; |
175 | uspace_arg_t *kernel_uarg; |
175 | uspace_arg_t *kernel_uarg; |
176 | 176 | ||
177 | as = as_create(0); |
177 | as = as_create(0); |
178 | ASSERT(as); |
178 | ASSERT(as); |
179 | 179 | ||
180 | rc = elf_load((elf_header_t *) program_addr, as); |
180 | rc = elf_load((elf_header_t *) program_addr, as); |
181 | if (rc != EE_OK) { |
181 | if (rc != EE_OK) { |
182 | as_destroy(as); |
182 | as_destroy(as); |
183 | return NULL; |
183 | return NULL; |
184 | } |
184 | } |
185 | 185 | ||
186 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
186 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
187 | kernel_uarg->uspace_entry = (void *) ((elf_header_t *) program_addr)->e_entry; |
187 | kernel_uarg->uspace_entry = (void *) ((elf_header_t *) program_addr)->e_entry; |
188 | kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS; |
188 | kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS; |
189 | kernel_uarg->uspace_thread_function = NULL; |
189 | kernel_uarg->uspace_thread_function = NULL; |
190 | kernel_uarg->uspace_thread_arg = NULL; |
190 | kernel_uarg->uspace_thread_arg = NULL; |
191 | kernel_uarg->uspace_uarg = NULL; |
191 | kernel_uarg->uspace_uarg = NULL; |
192 | 192 | ||
193 | task = task_create(as, name); |
193 | task = task_create(as, name); |
194 | ASSERT(task); |
194 | ASSERT(task); |
195 | 195 | ||
196 | /* |
196 | /* |
197 | * Create the data as_area. |
197 | * Create the data as_area. |
198 | */ |
198 | */ |
199 | a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE, |
199 | a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE, |
200 | LOADED_PROG_STACK_PAGES_NO*PAGE_SIZE, |
200 | LOADED_PROG_STACK_PAGES_NO*PAGE_SIZE, |
201 | USTACK_ADDRESS, AS_AREA_ATTR_NONE, &anon_backend, NULL); |
201 | USTACK_ADDRESS, AS_AREA_ATTR_NONE, &anon_backend, NULL); |
202 | 202 | ||
203 | /* |
203 | /* |
204 | * Create the main thread. |
204 | * Create the main thread. |
205 | */ |
205 | */ |
206 | t1 = thread_create(uinit, kernel_uarg, task, 0, "uinit"); |
206 | t1 = thread_create(uinit, kernel_uarg, task, 0, "uinit"); |
207 | ASSERT(t1); |
207 | ASSERT(t1); |
208 | 208 | ||
209 | /* |
209 | /* |
210 | * Create killer thread for the new task. |
210 | * Create killer thread for the new task. |
211 | */ |
211 | */ |
212 | t2 = thread_create(ktaskkill, t1, task, 0, "ktaskkill"); |
212 | t2 = thread_create(ktaskkill, t1, task, 0, "ktaskkill"); |
213 | ASSERT(t2); |
213 | ASSERT(t2); |
214 | thread_ready(t2); |
214 | thread_ready(t2); |
215 | 215 | ||
216 | thread_ready(t1); |
216 | thread_ready(t1); |
217 | 217 | ||
218 | return task; |
218 | return task; |
219 | } |
219 | } |
220 | 220 | ||
221 | /** Syscall for reading task ID from userspace. |
221 | /** Syscall for reading task ID from userspace. |
222 | * |
222 | * |
223 | * @param uspace_task_id Userspace address of 8-byte buffer where to store current task ID. |
223 | * @param uspace_task_id Userspace address of 8-byte buffer where to store current task ID. |
224 | * |
224 | * |
225 | * @return 0 on success or an error code from @ref errno.h. |
225 | * @return 0 on success or an error code from @ref errno.h. |
226 | */ |
226 | */ |
227 | __native sys_task_get_id(task_id_t *uspace_task_id) |
227 | __native sys_task_get_id(task_id_t *uspace_task_id) |
228 | { |
228 | { |
229 | /* |
229 | /* |
230 | * No need to acquire lock on TASK because taskid |
230 | * No need to acquire lock on TASK because taskid |
231 | * remains constant for the lifespan of the task. |
231 | * remains constant for the lifespan of the task. |
232 | */ |
232 | */ |
233 | return (__native) copy_to_uspace(uspace_task_id, &TASK->taskid, sizeof(TASK->taskid)); |
233 | return (__native) copy_to_uspace(uspace_task_id, &TASK->taskid, sizeof(TASK->taskid)); |
234 | } |
234 | } |
235 | 235 | ||
236 | /** Find task structure corresponding to task ID. |
236 | /** Find task structure corresponding to task ID. |
237 | * |
237 | * |
238 | * The tasks_lock must be already held by the caller of this function |
238 | * The tasks_lock must be already held by the caller of this function |
239 | * and interrupts must be disabled. |
239 | * and interrupts must be disabled. |
240 | * |
240 | * |
- | 241 | * The task is guaranteed to exist after it was found in the tasks_btree as long as: |
|
- | 242 | * @li the tasks_lock is held, |
|
- | 243 | * @li the task's lock is held when task's lock is acquired before releasing tasks_lock or |
|
- | 244 | * @li the task's refcount is grater than 0 |
|
- | 245 | * |
|
241 | * @param id Task ID. |
246 | * @param id Task ID. |
242 | * |
247 | * |
243 | * @return Task structure address or NULL if there is no such task ID. |
248 | * @return Task structure address or NULL if there is no such task ID. |
244 | */ |
249 | */ |
245 | task_t *task_find_by_id(task_id_t id) |
250 | task_t *task_find_by_id(task_id_t id) |
246 | { |
251 | { |
247 | btree_node_t *leaf; |
252 | btree_node_t *leaf; |
248 | 253 | ||
249 | return (task_t *) btree_search(&tasks_btree, (btree_key_t) id, &leaf); |
254 | return (task_t *) btree_search(&tasks_btree, (btree_key_t) id, &leaf); |
250 | } |
255 | } |
251 | 256 | ||
252 | /** Kill task. |
257 | /** Kill task. |
253 | * |
258 | * |
254 | * @param id ID of the task to be killed. |
259 | * @param id ID of the task to be killed. |
255 | * |
260 | * |
256 | * @return 0 on success or an error code from errno.h |
261 | * @return 0 on success or an error code from errno.h |
257 | */ |
262 | */ |
258 | int task_kill(task_id_t id) |
263 | int task_kill(task_id_t id) |
259 | { |
264 | { |
260 | ipl_t ipl; |
265 | ipl_t ipl; |
261 | task_t *ta; |
266 | task_t *ta; |
262 | thread_t *t; |
267 | thread_t *t; |
263 | link_t *cur; |
268 | link_t *cur; |
264 | 269 | ||
265 | ipl = interrupts_disable(); |
270 | ipl = interrupts_disable(); |
266 | spinlock_lock(&tasks_lock); |
271 | spinlock_lock(&tasks_lock); |
267 | 272 | ||
268 | if (!(ta = task_find_by_id(id))) { |
273 | if (!(ta = task_find_by_id(id))) { |
269 | spinlock_unlock(&tasks_lock); |
274 | spinlock_unlock(&tasks_lock); |
270 | interrupts_restore(ipl); |
275 | interrupts_restore(ipl); |
271 | return ENOENT; |
276 | return ENOENT; |
272 | } |
277 | } |
273 | 278 | ||
274 | spinlock_lock(&ta->lock); |
279 | spinlock_lock(&ta->lock); |
275 | ta->refcount++; |
280 | ta->refcount++; |
276 | spinlock_unlock(&ta->lock); |
281 | spinlock_unlock(&ta->lock); |
277 | 282 | ||
278 | btree_remove(&tasks_btree, ta->taskid, NULL); |
283 | btree_remove(&tasks_btree, ta->taskid, NULL); |
279 | spinlock_unlock(&tasks_lock); |
284 | spinlock_unlock(&tasks_lock); |
280 | 285 | ||
281 | t = thread_create(ktaskclnp, NULL, ta, 0, "ktaskclnp"); |
286 | t = thread_create(ktaskclnp, NULL, ta, 0, "ktaskclnp"); |
282 | 287 | ||
283 | spinlock_lock(&ta->lock); |
288 | spinlock_lock(&ta->lock); |
284 | ta->accept_new_threads = false; |
289 | ta->accept_new_threads = false; |
285 | ta->refcount--; |
290 | ta->refcount--; |
286 | 291 | ||
287 | /* |
292 | /* |
288 | * Interrupt all threads except this one. |
293 | * Interrupt all threads except this one. |
289 | */ |
294 | */ |
290 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
295 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
291 | thread_t *thr; |
296 | thread_t *thr; |
292 | bool sleeping = false; |
297 | bool sleeping = false; |
293 | 298 | ||
294 | thr = list_get_instance(cur, thread_t, th_link); |
299 | thr = list_get_instance(cur, thread_t, th_link); |
295 | if (thr == t) |
300 | if (thr == t) |
296 | continue; |
301 | continue; |
297 | 302 | ||
298 | spinlock_lock(&thr->lock); |
303 | spinlock_lock(&thr->lock); |
299 | thr->interrupted = true; |
304 | thr->interrupted = true; |
300 | if (thr->state == Sleeping) |
305 | if (thr->state == Sleeping) |
301 | sleeping = true; |
306 | sleeping = true; |
302 | spinlock_unlock(&thr->lock); |
307 | spinlock_unlock(&thr->lock); |
303 | 308 | ||
304 | if (sleeping) |
309 | if (sleeping) |
305 | waitq_interrupt_sleep(thr); |
310 | waitq_interrupt_sleep(thr); |
306 | } |
311 | } |
307 | 312 | ||
308 | spinlock_unlock(&ta->lock); |
313 | spinlock_unlock(&ta->lock); |
309 | interrupts_restore(ipl); |
314 | interrupts_restore(ipl); |
310 | 315 | ||
311 | if (t) |
316 | if (t) |
312 | thread_ready(t); |
317 | thread_ready(t); |
313 | 318 | ||
314 | return 0; |
319 | return 0; |
315 | } |
320 | } |
316 | 321 | ||
317 | /** Print task list */ |
322 | /** Print task list */ |
318 | void task_print_list(void) |
323 | void task_print_list(void) |
319 | { |
324 | { |
320 | link_t *cur; |
325 | link_t *cur; |
321 | ipl_t ipl; |
326 | ipl_t ipl; |
322 | 327 | ||
323 | /* Messing with thread structures, avoid deadlock */ |
328 | /* Messing with thread structures, avoid deadlock */ |
324 | ipl = interrupts_disable(); |
329 | ipl = interrupts_disable(); |
325 | spinlock_lock(&tasks_lock); |
330 | spinlock_lock(&tasks_lock); |
326 | 331 | ||
327 | for (cur = tasks_btree.leaf_head.next; cur != &tasks_btree.leaf_head; cur = cur->next) { |
332 | for (cur = tasks_btree.leaf_head.next; cur != &tasks_btree.leaf_head; cur = cur->next) { |
328 | btree_node_t *node; |
333 | btree_node_t *node; |
329 | int i; |
334 | int i; |
330 | 335 | ||
331 | node = list_get_instance(cur, btree_node_t, leaf_link); |
336 | node = list_get_instance(cur, btree_node_t, leaf_link); |
332 | for (i = 0; i < node->keys; i++) { |
337 | for (i = 0; i < node->keys; i++) { |
333 | task_t *t; |
338 | task_t *t; |
334 | int j; |
339 | int j; |
335 | 340 | ||
336 | t = (task_t *) node->value[i]; |
341 | t = (task_t *) node->value[i]; |
337 | 342 | ||
338 | spinlock_lock(&t->lock); |
343 | spinlock_lock(&t->lock); |
339 | printf("%s(%lld): address=%#zX, as=%#zX, ActiveCalls: %zd", |
344 | printf("%s(%lld): address=%#zX, as=%#zX, ActiveCalls: %zd", |
340 | t->name, t->taskid, t, t->as, atomic_get(&t->active_calls)); |
345 | t->name, t->taskid, t, t->as, atomic_get(&t->active_calls)); |
341 | for (j=0; j < IPC_MAX_PHONES; j++) { |
346 | for (j=0; j < IPC_MAX_PHONES; j++) { |
342 | if (t->phones[j].callee) |
347 | if (t->phones[j].callee) |
343 | printf(" Ph(%zd): %#zX ", j, t->phones[j].callee); |
348 | printf(" Ph(%zd): %#zX ", j, t->phones[j].callee); |
344 | } |
349 | } |
345 | printf("\n"); |
350 | printf("\n"); |
346 | spinlock_unlock(&t->lock); |
351 | spinlock_unlock(&t->lock); |
347 | } |
352 | } |
348 | } |
353 | } |
349 | 354 | ||
350 | spinlock_unlock(&tasks_lock); |
355 | spinlock_unlock(&tasks_lock); |
351 | interrupts_restore(ipl); |
356 | interrupts_restore(ipl); |
352 | } |
357 | } |
353 | 358 | ||
354 | /** Kernel thread used to cleanup the task after it is killed. */ |
359 | /** Kernel thread used to cleanup the task after it is killed. */ |
355 | void ktaskclnp(void *arg) |
360 | void ktaskclnp(void *arg) |
356 | { |
361 | { |
357 | ipl_t ipl; |
362 | ipl_t ipl; |
358 | thread_t *t = NULL, *main_thread; |
363 | thread_t *t = NULL, *main_thread; |
359 | link_t *cur; |
364 | link_t *cur; |
360 | 365 | ||
361 | thread_detach(THREAD); |
366 | thread_detach(THREAD); |
362 | 367 | ||
363 | loop: |
368 | loop: |
364 | ipl = interrupts_disable(); |
369 | ipl = interrupts_disable(); |
365 | spinlock_lock(&TASK->lock); |
370 | spinlock_lock(&TASK->lock); |
366 | 371 | ||
367 | main_thread = TASK->main_thread; |
372 | main_thread = TASK->main_thread; |
368 | 373 | ||
369 | /* |
374 | /* |
370 | * Find a thread to join. |
375 | * Find a thread to join. |
371 | */ |
376 | */ |
372 | for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) { |
377 | for (cur = TASK->th_head.next; cur != &TASK->th_head; cur = cur->next) { |
373 | t = list_get_instance(cur, thread_t, th_link); |
378 | t = list_get_instance(cur, thread_t, th_link); |
374 | if (t == THREAD) |
379 | if (t == THREAD) |
375 | continue; |
380 | continue; |
376 | else if (t == main_thread) |
381 | else if (t == main_thread) |
377 | continue; |
382 | continue; |
378 | else |
383 | else |
379 | break; |
384 | break; |
380 | } |
385 | } |
381 | 386 | ||
382 | spinlock_unlock(&TASK->lock); |
387 | spinlock_unlock(&TASK->lock); |
383 | interrupts_restore(ipl); |
388 | interrupts_restore(ipl); |
384 | 389 | ||
385 | if (t != THREAD) { |
390 | if (t != THREAD) { |
386 | ASSERT(t != main_thread); /* uninit is joined and detached in ktaskkill */ |
391 | ASSERT(t != main_thread); /* uninit is joined and detached in ktaskkill */ |
387 | thread_join(t); |
392 | thread_join(t); |
388 | thread_detach(t); |
393 | thread_detach(t); |
389 | goto loop; /* go for another thread */ |
394 | goto loop; /* go for another thread */ |
390 | } |
395 | } |
391 | 396 | ||
392 | /* |
397 | /* |
393 | * Now there are no other threads in this task |
398 | * Now there are no other threads in this task |
394 | * and no new threads can be created. |
399 | * and no new threads can be created. |
395 | */ |
400 | */ |
396 | 401 | ||
397 | ipc_cleanup(); |
402 | ipc_cleanup(); |
398 | futex_cleanup(); |
403 | futex_cleanup(); |
399 | } |
404 | } |
400 | 405 | ||
401 | /** Kernel task used to kill a userspace task when its main thread exits. |
406 | /** Kernel task used to kill a userspace task when its main thread exits. |
402 | * |
407 | * |
403 | * This thread waits until the main userspace thread (i.e. uninit) exits. |
408 | * This thread waits until the main userspace thread (i.e. uninit) exits. |
404 | * When this happens, the task is killed. |
409 | * When this happens, the task is killed. |
405 | * |
410 | * |
406 | * @param arg Pointer to the thread structure of the task's main thread. |
411 | * @param arg Pointer to the thread structure of the task's main thread. |
407 | */ |
412 | */ |
408 | void ktaskkill(void *arg) |
413 | void ktaskkill(void *arg) |
409 | { |
414 | { |
410 | thread_t *t = (thread_t *) arg; |
415 | thread_t *t = (thread_t *) arg; |
411 | 416 | ||
412 | /* |
417 | /* |
413 | * Userspace threads cannot detach themselves, |
418 | * Userspace threads cannot detach themselves, |
414 | * therefore the thread pointer is guaranteed to be valid. |
419 | * therefore the thread pointer is guaranteed to be valid. |
415 | */ |
420 | */ |
416 | thread_join(t); /* sleep uninterruptibly here! */ |
421 | thread_join(t); /* sleep uninterruptibly here! */ |
417 | thread_detach(t); |
422 | thread_detach(t); |
418 | task_kill(TASK->taskid); |
423 | task_kill(TASK->taskid); |
419 | } |
424 | } |
420 | 425 |