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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 <main/uinit.h> |
38 | #include <main/uinit.h> |
39 | #include <proc/thread.h> |
39 | #include <proc/thread.h> |
40 | #include <proc/task.h> |
40 | #include <proc/task.h> |
41 | #include <proc/uarg.h> |
41 | #include <proc/uarg.h> |
42 | #include <mm/as.h> |
42 | #include <mm/as.h> |
43 | #include <mm/slab.h> |
43 | #include <mm/slab.h> |
44 | #include <atomic.h> |
44 | #include <atomic.h> |
45 | #include <synch/spinlock.h> |
45 | #include <synch/spinlock.h> |
46 | #include <synch/waitq.h> |
46 | #include <synch/waitq.h> |
47 | #include <arch.h> |
47 | #include <arch.h> |
48 | #include <panic.h> |
48 | #include <panic.h> |
49 | #include <adt/avl.h> |
49 | #include <adt/avl.h> |
50 | #include <adt/btree.h> |
50 | #include <adt/btree.h> |
51 | #include <adt/list.h> |
51 | #include <adt/list.h> |
52 | #include <ipc/ipc.h> |
52 | #include <ipc/ipc.h> |
53 | #include <security/cap.h> |
53 | #include <security/cap.h> |
54 | #include <memstr.h> |
54 | #include <memstr.h> |
55 | #include <print.h> |
55 | #include <print.h> |
56 | #include <lib/elf.h> |
56 | #include <lib/elf.h> |
57 | #include <errno.h> |
57 | #include <errno.h> |
58 | #include <func.h> |
58 | #include <func.h> |
59 | #include <syscall/copy.h> |
59 | #include <syscall/copy.h> |
60 | 60 | ||
61 | #ifndef LOADED_PROG_STACK_PAGES_NO |
61 | #ifndef LOADED_PROG_STACK_PAGES_NO |
62 | #define LOADED_PROG_STACK_PAGES_NO 1 |
62 | #define LOADED_PROG_STACK_PAGES_NO 1 |
63 | #endif |
63 | #endif |
64 | 64 | ||
65 | /** Spinlock protecting the tasks_tree AVL tree. */ |
65 | /** Spinlock protecting the tasks_tree AVL tree. */ |
66 | SPINLOCK_INITIALIZE(tasks_lock); |
66 | SPINLOCK_INITIALIZE(tasks_lock); |
67 | 67 | ||
68 | /** AVL tree of active tasks. |
68 | /** AVL tree of active tasks. |
69 | * |
69 | * |
70 | * The task is guaranteed to exist after it was found in the tasks_tree as |
70 | * The task is guaranteed to exist after it was found in the tasks_tree as |
71 | * long as: |
71 | * long as: |
72 | * @li the tasks_lock is held, |
72 | * @li the tasks_lock is held, |
73 | * @li the task's lock is held when task's lock is acquired before releasing |
73 | * @li the task's lock is held when task's lock is acquired before releasing |
74 | * tasks_lock or |
74 | * tasks_lock or |
75 | * @li the task's refcount is greater than 0 |
75 | * @li the task's refcount is greater than 0 |
76 | * |
76 | * |
77 | */ |
77 | */ |
78 | avltree_t tasks_tree; |
78 | avltree_t tasks_tree; |
79 | 79 | ||
80 | static task_id_t task_counter = 0; |
80 | static task_id_t task_counter = 0; |
81 | 81 | ||
82 | /** Initialize tasks |
82 | /** Initialize tasks |
83 | * |
83 | * |
84 | * Initialize kernel tasks support. |
84 | * Initialize kernel tasks support. |
85 | * |
85 | * |
86 | */ |
86 | */ |
87 | void task_init(void) |
87 | void task_init(void) |
88 | { |
88 | { |
89 | TASK = NULL; |
89 | TASK = NULL; |
90 | avltree_create(&tasks_tree); |
90 | avltree_create(&tasks_tree); |
91 | } |
91 | } |
92 | 92 | ||
93 | /* |
93 | /* |
94 | * The idea behind this walker is to remember a single task different from TASK. |
94 | * The idea behind this walker is to remember a single task different from TASK. |
95 | */ |
95 | */ |
96 | static bool task_done_walker(avltree_node_t *node, void *arg) |
96 | static bool task_done_walker(avltree_node_t *node, void *arg) |
97 | { |
97 | { |
98 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
98 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
99 | task_t **tp = (task_t **) arg; |
99 | task_t **tp = (task_t **) arg; |
100 | 100 | ||
101 | if (t != TASK) { |
101 | if (t != TASK) { |
102 | *tp = t; |
102 | *tp = t; |
103 | return false; /* stop walking */ |
103 | return false; /* stop walking */ |
104 | } |
104 | } |
105 | 105 | ||
106 | return true; /* continue the walk */ |
106 | return true; /* continue the walk */ |
107 | } |
107 | } |
108 | 108 | ||
109 | /** Kill all tasks except the current task. |
109 | /** Kill all tasks except the current task. |
110 | * |
110 | * |
111 | */ |
111 | */ |
112 | void task_done(void) |
112 | void task_done(void) |
113 | { |
113 | { |
114 | task_t *t; |
114 | task_t *t; |
115 | do { /* Repeat until there are any tasks except TASK */ |
115 | do { /* Repeat until there are any tasks except TASK */ |
116 | 116 | ||
117 | /* Messing with task structures, avoid deadlock */ |
117 | /* Messing with task structures, avoid deadlock */ |
118 | ipl_t ipl = interrupts_disable(); |
118 | ipl_t ipl = interrupts_disable(); |
119 | spinlock_lock(&tasks_lock); |
119 | spinlock_lock(&tasks_lock); |
120 | 120 | ||
121 | t = NULL; |
121 | t = NULL; |
122 | avltree_walk(&tasks_tree, task_done_walker, &t); |
122 | avltree_walk(&tasks_tree, task_done_walker, &t); |
123 | 123 | ||
124 | if (t != NULL) { |
124 | if (t != NULL) { |
125 | task_id_t id = t->taskid; |
125 | task_id_t id = t->taskid; |
126 | 126 | ||
127 | spinlock_unlock(&tasks_lock); |
127 | spinlock_unlock(&tasks_lock); |
128 | interrupts_restore(ipl); |
128 | interrupts_restore(ipl); |
129 | 129 | ||
130 | #ifdef CONFIG_DEBUG |
130 | #ifdef CONFIG_DEBUG |
131 | printf("Killing task %llu\n", id); |
131 | printf("Killing task %llu\n", id); |
132 | #endif |
132 | #endif |
133 | task_kill(id); |
133 | task_kill(id); |
- | 134 | thread_usleep(10000); |
|
134 | } else { |
135 | } else { |
135 | spinlock_unlock(&tasks_lock); |
136 | spinlock_unlock(&tasks_lock); |
136 | interrupts_restore(ipl); |
137 | interrupts_restore(ipl); |
137 | } |
138 | } |
138 | 139 | ||
139 | } while (t != NULL); |
140 | } while (t != NULL); |
140 | } |
141 | } |
141 | 142 | ||
142 | /** Create new task |
143 | /** Create new task |
143 | * |
144 | * |
144 | * Create new task with no threads. |
145 | * Create new task with no threads. |
145 | * |
146 | * |
146 | * @param as Task's address space. |
147 | * @param as Task's address space. |
147 | * @param name Symbolic name. |
148 | * @param name Symbolic name. |
148 | * |
149 | * |
149 | * @return New task's structure |
150 | * @return New task's structure |
150 | * |
151 | * |
151 | */ |
152 | */ |
152 | task_t *task_create(as_t *as, char *name) |
153 | task_t *task_create(as_t *as, char *name) |
153 | { |
154 | { |
154 | ipl_t ipl; |
155 | ipl_t ipl; |
155 | task_t *ta; |
156 | task_t *ta; |
156 | int i; |
157 | int i; |
157 | 158 | ||
158 | ta = (task_t *) malloc(sizeof(task_t), 0); |
159 | ta = (task_t *) malloc(sizeof(task_t), 0); |
159 | 160 | ||
160 | task_create_arch(ta); |
161 | task_create_arch(ta); |
161 | 162 | ||
162 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
163 | spinlock_initialize(&ta->lock, "task_ta_lock"); |
163 | list_initialize(&ta->th_head); |
164 | list_initialize(&ta->th_head); |
164 | ta->as = as; |
165 | ta->as = as; |
165 | ta->name = name; |
166 | ta->name = name; |
166 | atomic_set(&ta->refcount, 0); |
167 | atomic_set(&ta->refcount, 0); |
167 | atomic_set(&ta->lifecount, 0); |
168 | atomic_set(&ta->lifecount, 0); |
168 | ta->context = CONTEXT; |
169 | ta->context = CONTEXT; |
169 | 170 | ||
170 | ta->capabilities = 0; |
171 | ta->capabilities = 0; |
171 | ta->cycles = 0; |
172 | ta->cycles = 0; |
172 | 173 | ||
173 | ipc_answerbox_init(&ta->answerbox); |
174 | ipc_answerbox_init(&ta->answerbox); |
174 | for (i = 0; i < IPC_MAX_PHONES; i++) |
175 | for (i = 0; i < IPC_MAX_PHONES; i++) |
175 | ipc_phone_init(&ta->phones[i]); |
176 | ipc_phone_init(&ta->phones[i]); |
176 | if ((ipc_phone_0) && (context_check(ipc_phone_0->task->context, |
177 | if ((ipc_phone_0) && (context_check(ipc_phone_0->task->context, |
177 | ta->context))) |
178 | ta->context))) |
178 | ipc_phone_connect(&ta->phones[0], ipc_phone_0); |
179 | ipc_phone_connect(&ta->phones[0], ipc_phone_0); |
179 | atomic_set(&ta->active_calls, 0); |
180 | atomic_set(&ta->active_calls, 0); |
180 | 181 | ||
181 | mutex_initialize(&ta->futexes_lock); |
182 | mutex_initialize(&ta->futexes_lock); |
182 | btree_create(&ta->futexes); |
183 | btree_create(&ta->futexes); |
183 | 184 | ||
184 | ipl = interrupts_disable(); |
185 | ipl = interrupts_disable(); |
185 | 186 | ||
186 | /* |
187 | /* |
187 | * Increment address space reference count. |
188 | * Increment address space reference count. |
188 | */ |
189 | */ |
189 | atomic_inc(&as->refcount); |
190 | atomic_inc(&as->refcount); |
190 | 191 | ||
191 | spinlock_lock(&tasks_lock); |
192 | spinlock_lock(&tasks_lock); |
192 | ta->taskid = ++task_counter; |
193 | ta->taskid = ++task_counter; |
193 | avltree_node_initialize(&ta->tasks_tree_node); |
194 | avltree_node_initialize(&ta->tasks_tree_node); |
194 | ta->tasks_tree_node.key = ta->taskid; |
195 | ta->tasks_tree_node.key = ta->taskid; |
195 | avltree_insert(&tasks_tree, &ta->tasks_tree_node); |
196 | avltree_insert(&tasks_tree, &ta->tasks_tree_node); |
196 | spinlock_unlock(&tasks_lock); |
197 | spinlock_unlock(&tasks_lock); |
197 | interrupts_restore(ipl); |
198 | interrupts_restore(ipl); |
198 | 199 | ||
199 | return ta; |
200 | return ta; |
200 | } |
201 | } |
201 | 202 | ||
202 | /** Destroy task. |
203 | /** Destroy task. |
203 | * |
204 | * |
204 | * @param t Task to be destroyed. |
205 | * @param t Task to be destroyed. |
205 | */ |
206 | */ |
206 | void task_destroy(task_t *t) |
207 | void task_destroy(task_t *t) |
207 | { |
208 | { |
208 | /* |
209 | /* |
209 | * Remove the task from the task B+tree. |
210 | * Remove the task from the task B+tree. |
210 | */ |
211 | */ |
211 | spinlock_lock(&tasks_lock); |
212 | spinlock_lock(&tasks_lock); |
212 | avltree_delete(&tasks_tree, &t->tasks_tree_node); |
213 | avltree_delete(&tasks_tree, &t->tasks_tree_node); |
213 | spinlock_unlock(&tasks_lock); |
214 | spinlock_unlock(&tasks_lock); |
214 | 215 | ||
215 | /* |
216 | /* |
216 | * Perform architecture specific task destruction. |
217 | * Perform architecture specific task destruction. |
217 | */ |
218 | */ |
218 | task_destroy_arch(t); |
219 | task_destroy_arch(t); |
219 | 220 | ||
220 | /* |
221 | /* |
221 | * Free up dynamically allocated state. |
222 | * Free up dynamically allocated state. |
222 | */ |
223 | */ |
223 | btree_destroy(&t->futexes); |
224 | btree_destroy(&t->futexes); |
224 | 225 | ||
225 | /* |
226 | /* |
226 | * Drop our reference to the address space. |
227 | * Drop our reference to the address space. |
227 | */ |
228 | */ |
228 | if (atomic_predec(&t->as->refcount) == 0) |
229 | if (atomic_predec(&t->as->refcount) == 0) |
229 | as_destroy(t->as); |
230 | as_destroy(t->as); |
230 | 231 | ||
231 | free(t); |
232 | free(t); |
232 | TASK = NULL; |
233 | TASK = NULL; |
233 | } |
234 | } |
234 | 235 | ||
235 | /** Create new task with 1 thread and run it |
236 | /** Create new task with 1 thread and run it |
236 | * |
237 | * |
237 | * @param program_addr Address of program executable image. |
238 | * @param program_addr Address of program executable image. |
238 | * @param name Program name. |
239 | * @param name Program name. |
239 | * |
240 | * |
240 | * @return Task of the running program or NULL on error. |
241 | * @return Task of the running program or NULL on error. |
241 | */ |
242 | */ |
242 | task_t *task_run_program(void *program_addr, char *name) |
243 | task_t *task_run_program(void *program_addr, char *name) |
243 | { |
244 | { |
244 | as_t *as; |
245 | as_t *as; |
245 | as_area_t *a; |
246 | as_area_t *a; |
246 | int rc; |
247 | int rc; |
247 | thread_t *t; |
248 | thread_t *t; |
248 | task_t *task; |
249 | task_t *task; |
249 | uspace_arg_t *kernel_uarg; |
250 | uspace_arg_t *kernel_uarg; |
250 | 251 | ||
251 | as = as_create(0); |
252 | as = as_create(0); |
252 | ASSERT(as); |
253 | ASSERT(as); |
253 | 254 | ||
254 | rc = elf_load((elf_header_t *) program_addr, as); |
255 | rc = elf_load((elf_header_t *) program_addr, as); |
255 | if (rc != EE_OK) { |
256 | if (rc != EE_OK) { |
256 | as_destroy(as); |
257 | as_destroy(as); |
257 | return NULL; |
258 | return NULL; |
258 | } |
259 | } |
259 | 260 | ||
260 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
261 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
261 | kernel_uarg->uspace_entry = |
262 | kernel_uarg->uspace_entry = |
262 | (void *) ((elf_header_t *) program_addr)->e_entry; |
263 | (void *) ((elf_header_t *) program_addr)->e_entry; |
263 | kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS; |
264 | kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS; |
264 | kernel_uarg->uspace_thread_function = NULL; |
265 | kernel_uarg->uspace_thread_function = NULL; |
265 | kernel_uarg->uspace_thread_arg = NULL; |
266 | kernel_uarg->uspace_thread_arg = NULL; |
266 | kernel_uarg->uspace_uarg = NULL; |
267 | kernel_uarg->uspace_uarg = NULL; |
267 | 268 | ||
268 | task = task_create(as, name); |
269 | task = task_create(as, name); |
269 | ASSERT(task); |
270 | ASSERT(task); |
270 | 271 | ||
271 | /* |
272 | /* |
272 | * Create the data as_area. |
273 | * Create the data as_area. |
273 | */ |
274 | */ |
274 | a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE, |
275 | a = as_area_create(as, AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE, |
275 | LOADED_PROG_STACK_PAGES_NO * PAGE_SIZE, USTACK_ADDRESS, |
276 | LOADED_PROG_STACK_PAGES_NO * PAGE_SIZE, USTACK_ADDRESS, |
276 | AS_AREA_ATTR_NONE, &anon_backend, NULL); |
277 | AS_AREA_ATTR_NONE, &anon_backend, NULL); |
277 | 278 | ||
278 | /* |
279 | /* |
279 | * Create the main thread. |
280 | * Create the main thread. |
280 | */ |
281 | */ |
281 | t = thread_create(uinit, kernel_uarg, task, THREAD_FLAG_USPACE, |
282 | t = thread_create(uinit, kernel_uarg, task, THREAD_FLAG_USPACE, |
282 | "uinit", false); |
283 | "uinit", false); |
283 | ASSERT(t); |
284 | ASSERT(t); |
284 | 285 | ||
285 | thread_ready(t); |
286 | thread_ready(t); |
286 | 287 | ||
287 | return task; |
288 | return task; |
288 | } |
289 | } |
289 | 290 | ||
290 | /** Syscall for reading task ID from userspace. |
291 | /** Syscall for reading task ID from userspace. |
291 | * |
292 | * |
292 | * @param uspace_task_id Userspace address of 8-byte buffer where to store |
293 | * @param uspace_task_id Userspace address of 8-byte buffer where to store |
293 | * current task ID. |
294 | * current task ID. |
294 | * |
295 | * |
295 | * @return 0 on success or an error code from @ref errno.h. |
296 | * @return 0 on success or an error code from @ref errno.h. |
296 | */ |
297 | */ |
297 | unative_t sys_task_get_id(task_id_t *uspace_task_id) |
298 | unative_t sys_task_get_id(task_id_t *uspace_task_id) |
298 | { |
299 | { |
299 | /* |
300 | /* |
300 | * No need to acquire lock on TASK because taskid |
301 | * No need to acquire lock on TASK because taskid |
301 | * remains constant for the lifespan of the task. |
302 | * remains constant for the lifespan of the task. |
302 | */ |
303 | */ |
303 | return (unative_t) copy_to_uspace(uspace_task_id, &TASK->taskid, |
304 | return (unative_t) copy_to_uspace(uspace_task_id, &TASK->taskid, |
304 | sizeof(TASK->taskid)); |
305 | sizeof(TASK->taskid)); |
305 | } |
306 | } |
306 | 307 | ||
307 | /** Find task structure corresponding to task ID. |
308 | /** Find task structure corresponding to task ID. |
308 | * |
309 | * |
309 | * The tasks_lock must be already held by the caller of this function |
310 | * The tasks_lock must be already held by the caller of this function |
310 | * and interrupts must be disabled. |
311 | * and interrupts must be disabled. |
311 | * |
312 | * |
312 | * @param id Task ID. |
313 | * @param id Task ID. |
313 | * |
314 | * |
314 | * @return Task structure address or NULL if there is no such task ID. |
315 | * @return Task structure address or NULL if there is no such task ID. |
315 | */ |
316 | */ |
316 | task_t *task_find_by_id(task_id_t id) |
317 | task_t *task_find_by_id(task_id_t id) |
317 | { |
318 | { |
318 | avltree_node_t *node; |
319 | avltree_node_t *node; |
319 | 320 | ||
320 | node = avltree_search(&tasks_tree, (avltree_key_t) id); |
321 | node = avltree_search(&tasks_tree, (avltree_key_t) id); |
321 | 322 | ||
322 | if (node) |
323 | if (node) |
323 | return avltree_get_instance(node, task_t, tasks_tree_node); |
324 | return avltree_get_instance(node, task_t, tasks_tree_node); |
324 | return NULL; |
325 | return NULL; |
325 | } |
326 | } |
326 | 327 | ||
327 | /** Get accounting data of given task. |
328 | /** Get accounting data of given task. |
328 | * |
329 | * |
329 | * Note that task lock of 't' must be already held and |
330 | * Note that task lock of 't' must be already held and |
330 | * interrupts must be already disabled. |
331 | * interrupts must be already disabled. |
331 | * |
332 | * |
332 | * @param t Pointer to thread. |
333 | * @param t Pointer to thread. |
333 | * |
334 | * |
334 | */ |
335 | */ |
335 | uint64_t task_get_accounting(task_t *t) |
336 | uint64_t task_get_accounting(task_t *t) |
336 | { |
337 | { |
337 | /* Accumulated value of task */ |
338 | /* Accumulated value of task */ |
338 | uint64_t ret = t->cycles; |
339 | uint64_t ret = t->cycles; |
339 | 340 | ||
340 | /* Current values of threads */ |
341 | /* Current values of threads */ |
341 | link_t *cur; |
342 | link_t *cur; |
342 | for (cur = t->th_head.next; cur != &t->th_head; cur = cur->next) { |
343 | for (cur = t->th_head.next; cur != &t->th_head; cur = cur->next) { |
343 | thread_t *thr = list_get_instance(cur, thread_t, th_link); |
344 | thread_t *thr = list_get_instance(cur, thread_t, th_link); |
344 | 345 | ||
345 | spinlock_lock(&thr->lock); |
346 | spinlock_lock(&thr->lock); |
346 | /* Process only counted threads */ |
347 | /* Process only counted threads */ |
347 | if (!thr->uncounted) { |
348 | if (!thr->uncounted) { |
348 | if (thr == THREAD) { |
349 | if (thr == THREAD) { |
349 | /* Update accounting of current thread */ |
350 | /* Update accounting of current thread */ |
350 | thread_update_accounting(); |
351 | thread_update_accounting(); |
351 | } |
352 | } |
352 | ret += thr->cycles; |
353 | ret += thr->cycles; |
353 | } |
354 | } |
354 | spinlock_unlock(&thr->lock); |
355 | spinlock_unlock(&thr->lock); |
355 | } |
356 | } |
356 | 357 | ||
357 | return ret; |
358 | return ret; |
358 | } |
359 | } |
359 | 360 | ||
360 | /** Kill task. |
361 | /** Kill task. |
361 | * |
362 | * |
362 | * This function is idempotent. |
363 | * This function is idempotent. |
363 | * It signals all the task's threads to bail it out. |
364 | * It signals all the task's threads to bail it out. |
364 | * |
365 | * |
365 | * @param id ID of the task to be killed. |
366 | * @param id ID of the task to be killed. |
366 | * |
367 | * |
367 | * @return 0 on success or an error code from errno.h |
368 | * @return 0 on success or an error code from errno.h |
368 | */ |
369 | */ |
369 | int task_kill(task_id_t id) |
370 | int task_kill(task_id_t id) |
370 | { |
371 | { |
371 | ipl_t ipl; |
372 | ipl_t ipl; |
372 | task_t *ta; |
373 | task_t *ta; |
373 | link_t *cur; |
374 | link_t *cur; |
374 | 375 | ||
375 | if (id == 1) |
376 | if (id == 1) |
376 | return EPERM; |
377 | return EPERM; |
377 | 378 | ||
378 | ipl = interrupts_disable(); |
379 | ipl = interrupts_disable(); |
379 | spinlock_lock(&tasks_lock); |
380 | spinlock_lock(&tasks_lock); |
380 | if (!(ta = task_find_by_id(id))) { |
381 | if (!(ta = task_find_by_id(id))) { |
381 | spinlock_unlock(&tasks_lock); |
382 | spinlock_unlock(&tasks_lock); |
382 | interrupts_restore(ipl); |
383 | interrupts_restore(ipl); |
383 | return ENOENT; |
384 | return ENOENT; |
384 | } |
385 | } |
385 | spinlock_unlock(&tasks_lock); |
386 | spinlock_unlock(&tasks_lock); |
386 | 387 | ||
387 | /* |
388 | /* |
388 | * Interrupt all threads except ktaskclnp. |
389 | * Interrupt all threads except ktaskclnp. |
389 | */ |
390 | */ |
390 | spinlock_lock(&ta->lock); |
391 | spinlock_lock(&ta->lock); |
391 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
392 | for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) { |
392 | thread_t *thr; |
393 | thread_t *thr; |
393 | bool sleeping = false; |
394 | bool sleeping = false; |
394 | 395 | ||
395 | thr = list_get_instance(cur, thread_t, th_link); |
396 | thr = list_get_instance(cur, thread_t, th_link); |
396 | 397 | ||
397 | spinlock_lock(&thr->lock); |
398 | spinlock_lock(&thr->lock); |
398 | thr->interrupted = true; |
399 | thr->interrupted = true; |
399 | if (thr->state == Sleeping) |
400 | if (thr->state == Sleeping) |
400 | sleeping = true; |
401 | sleeping = true; |
401 | spinlock_unlock(&thr->lock); |
402 | spinlock_unlock(&thr->lock); |
402 | 403 | ||
403 | if (sleeping) |
404 | if (sleeping) |
404 | waitq_interrupt_sleep(thr); |
405 | waitq_interrupt_sleep(thr); |
405 | } |
406 | } |
406 | spinlock_unlock(&ta->lock); |
407 | spinlock_unlock(&ta->lock); |
407 | interrupts_restore(ipl); |
408 | interrupts_restore(ipl); |
408 | 409 | ||
409 | return 0; |
410 | return 0; |
410 | } |
411 | } |
411 | 412 | ||
412 | static bool task_print_walker(avltree_node_t *node, void *arg) |
413 | static bool task_print_walker(avltree_node_t *node, void *arg) |
413 | { |
414 | { |
414 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
415 | task_t *t = avltree_get_instance(node, task_t, tasks_tree_node); |
415 | int j; |
416 | int j; |
416 | 417 | ||
417 | spinlock_lock(&t->lock); |
418 | spinlock_lock(&t->lock); |
418 | 419 | ||
419 | uint64_t cycles; |
420 | uint64_t cycles; |
420 | char suffix; |
421 | char suffix; |
421 | order(task_get_accounting(t), &cycles, &suffix); |
422 | order(task_get_accounting(t), &cycles, &suffix); |
422 | 423 | ||
423 | printf("%-6llu %-10s %-3ld %#10zx %#10zx %9llu%c %7zd %6zd", |
424 | printf("%-6llu %-10s %-3ld %#10zx %#10zx %9llu%c %7zd %6zd", |
424 | t->taskid, t->name, t->context, t, t->as, cycles, suffix, |
425 | t->taskid, t->name, t->context, t, t->as, cycles, suffix, |
425 | t->refcount, atomic_get(&t->active_calls)); |
426 | t->refcount, atomic_get(&t->active_calls)); |
426 | for (j = 0; j < IPC_MAX_PHONES; j++) { |
427 | for (j = 0; j < IPC_MAX_PHONES; j++) { |
427 | if (t->phones[j].callee) |
428 | if (t->phones[j].callee) |
428 | printf(" %zd:%#zx", j, t->phones[j].callee); |
429 | printf(" %zd:%#zx", j, t->phones[j].callee); |
429 | } |
430 | } |
430 | printf("\n"); |
431 | printf("\n"); |
431 | 432 | ||
432 | spinlock_unlock(&t->lock); |
433 | spinlock_unlock(&t->lock); |
433 | return true; |
434 | return true; |
434 | } |
435 | } |
435 | 436 | ||
436 | /** Print task list */ |
437 | /** Print task list */ |
437 | void task_print_list(void) |
438 | void task_print_list(void) |
438 | { |
439 | { |
439 | ipl_t ipl; |
440 | ipl_t ipl; |
440 | 441 | ||
441 | /* Messing with task structures, avoid deadlock */ |
442 | /* Messing with task structures, avoid deadlock */ |
442 | ipl = interrupts_disable(); |
443 | ipl = interrupts_disable(); |
443 | spinlock_lock(&tasks_lock); |
444 | spinlock_lock(&tasks_lock); |
444 | 445 | ||
445 | printf("taskid name ctx address as cycles threads " |
446 | printf("taskid name ctx address as cycles threads " |
446 | "calls callee\n"); |
447 | "calls callee\n"); |
447 | printf("------ ---------- --- ---------- ---------- ---------- ------- " |
448 | printf("------ ---------- --- ---------- ---------- ---------- ------- " |
448 | "------ ------>\n"); |
449 | "------ ------>\n"); |
449 | 450 | ||
450 | avltree_walk(&tasks_tree, task_print_walker, NULL); |
451 | avltree_walk(&tasks_tree, task_print_walker, NULL); |
451 | 452 | ||
452 | spinlock_unlock(&tasks_lock); |
453 | spinlock_unlock(&tasks_lock); |
453 | interrupts_restore(ipl); |
454 | interrupts_restore(ipl); |
454 | } |
455 | } |
455 | 456 | ||
456 | /** @} |
457 | /** @} |
457 | */ |
458 | */ |
458 | 459 |