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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 Thread management functions. |
35 | * @brief Thread management functions. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <proc/scheduler.h> |
38 | #include <proc/scheduler.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/frame.h> |
42 | #include <mm/frame.h> |
43 | #include <mm/page.h> |
43 | #include <mm/page.h> |
44 | #include <arch/asm.h> |
44 | #include <arch/asm.h> |
45 | #include <arch/cycle.h> |
45 | #include <arch/cycle.h> |
46 | #include <arch.h> |
46 | #include <arch.h> |
47 | #include <synch/synch.h> |
47 | #include <synch/synch.h> |
48 | #include <synch/spinlock.h> |
48 | #include <synch/spinlock.h> |
49 | #include <synch/waitq.h> |
49 | #include <synch/waitq.h> |
50 | #include <synch/rwlock.h> |
50 | #include <synch/rwlock.h> |
51 | #include <cpu.h> |
51 | #include <cpu.h> |
52 | #include <func.h> |
52 | #include <func.h> |
53 | #include <context.h> |
53 | #include <context.h> |
54 | #include <adt/avl.h> |
54 | #include <adt/avl.h> |
55 | #include <adt/list.h> |
55 | #include <adt/list.h> |
56 | #include <time/clock.h> |
56 | #include <time/clock.h> |
57 | #include <time/timeout.h> |
57 | #include <time/timeout.h> |
58 | #include <config.h> |
58 | #include <config.h> |
59 | #include <arch/interrupt.h> |
59 | #include <arch/interrupt.h> |
60 | #include <smp/ipi.h> |
60 | #include <smp/ipi.h> |
61 | #include <arch/faddr.h> |
61 | #include <arch/faddr.h> |
62 | #include <atomic.h> |
62 | #include <atomic.h> |
63 | #include <memstr.h> |
63 | #include <memstr.h> |
64 | #include <print.h> |
64 | #include <print.h> |
65 | #include <mm/slab.h> |
65 | #include <mm/slab.h> |
66 | #include <debug.h> |
66 | #include <debug.h> |
67 | #include <main/uinit.h> |
67 | #include <main/uinit.h> |
68 | #include <syscall/copy.h> |
68 | #include <syscall/copy.h> |
69 | #include <errno.h> |
69 | #include <errno.h> |
70 | #include <console/klog.h> |
70 | #include <console/klog.h> |
71 | 71 | ||
72 | 72 | ||
73 | /** Thread states */ |
73 | /** Thread states */ |
74 | char *thread_states[] = { |
74 | char *thread_states[] = { |
75 | "Invalid", |
75 | "Invalid", |
76 | "Running", |
76 | "Running", |
77 | "Sleeping", |
77 | "Sleeping", |
78 | "Ready", |
78 | "Ready", |
79 | "Entering", |
79 | "Entering", |
80 | "Exiting", |
80 | "Exiting", |
81 | "Lingering" |
81 | "Lingering" |
82 | }; |
82 | }; |
83 | 83 | ||
84 | /** Lock protecting the threads_tree AVL tree. |
84 | /** Lock protecting the threads_tree AVL tree. |
85 | * |
85 | * |
86 | * For locking rules, see declaration thereof. |
86 | * For locking rules, see declaration thereof. |
87 | */ |
87 | */ |
88 | SPINLOCK_INITIALIZE(threads_lock); |
88 | SPINLOCK_INITIALIZE(threads_lock); |
89 | 89 | ||
90 | /** ALV tree of all threads. |
90 | /** ALV tree of all threads. |
91 | * |
91 | * |
92 | * When a thread is found in the threads_tree AVL tree, it is guaranteed to |
92 | * When a thread is found in the threads_tree AVL tree, it is guaranteed to |
93 | * exist as long as the threads_lock is held. |
93 | * exist as long as the threads_lock is held. |
94 | */ |
94 | */ |
95 | avltree_t threads_tree; |
95 | avltree_t threads_tree; |
96 | 96 | ||
97 | SPINLOCK_INITIALIZE(tidlock); |
97 | SPINLOCK_INITIALIZE(tidlock); |
98 | thread_id_t last_tid = 0; |
98 | thread_id_t last_tid = 0; |
99 | 99 | ||
100 | static slab_cache_t *thread_slab; |
100 | static slab_cache_t *thread_slab; |
101 | #ifdef ARCH_HAS_FPU |
101 | #ifdef ARCH_HAS_FPU |
102 | slab_cache_t *fpu_context_slab; |
102 | slab_cache_t *fpu_context_slab; |
103 | #endif |
103 | #endif |
104 | 104 | ||
105 | /** Thread wrapper. |
105 | /** Thread wrapper. |
106 | * |
106 | * |
107 | * This wrapper is provided to ensure that every thread makes a call to |
107 | * This wrapper is provided to ensure that every thread makes a call to |
108 | * thread_exit() when its implementing function returns. |
108 | * thread_exit() when its implementing function returns. |
109 | * |
109 | * |
110 | * interrupts_disable() is assumed. |
110 | * interrupts_disable() is assumed. |
111 | * |
111 | * |
112 | */ |
112 | */ |
113 | static void cushion(void) |
113 | static void cushion(void) |
114 | { |
114 | { |
115 | void (*f)(void *) = THREAD->thread_code; |
115 | void (*f)(void *) = THREAD->thread_code; |
116 | void *arg = THREAD->thread_arg; |
116 | void *arg = THREAD->thread_arg; |
117 | THREAD->last_cycle = get_cycle(); |
117 | THREAD->last_cycle = get_cycle(); |
118 | 118 | ||
119 | /* This is where each thread wakes up after its creation */ |
119 | /* This is where each thread wakes up after its creation */ |
120 | spinlock_unlock(&THREAD->lock); |
120 | spinlock_unlock(&THREAD->lock); |
121 | interrupts_enable(); |
121 | interrupts_enable(); |
122 | 122 | ||
123 | f(arg); |
123 | f(arg); |
124 | 124 | ||
125 | /* Accumulate accounting to the task */ |
125 | /* Accumulate accounting to the task */ |
126 | ipl_t ipl = interrupts_disable(); |
126 | ipl_t ipl = interrupts_disable(); |
127 | 127 | ||
128 | spinlock_lock(&THREAD->lock); |
128 | spinlock_lock(&THREAD->lock); |
129 | if (!THREAD->uncounted) { |
129 | if (!THREAD->uncounted) { |
130 | thread_update_accounting(); |
130 | thread_update_accounting(); |
131 | uint64_t cycles = THREAD->cycles; |
131 | uint64_t cycles = THREAD->cycles; |
132 | THREAD->cycles = 0; |
132 | THREAD->cycles = 0; |
133 | spinlock_unlock(&THREAD->lock); |
133 | spinlock_unlock(&THREAD->lock); |
134 | 134 | ||
135 | spinlock_lock(&TASK->lock); |
135 | spinlock_lock(&TASK->lock); |
136 | TASK->cycles += cycles; |
136 | TASK->cycles += cycles; |
137 | spinlock_unlock(&TASK->lock); |
137 | spinlock_unlock(&TASK->lock); |
138 | } else |
138 | } else |
139 | spinlock_unlock(&THREAD->lock); |
139 | spinlock_unlock(&THREAD->lock); |
140 | 140 | ||
141 | interrupts_restore(ipl); |
141 | interrupts_restore(ipl); |
142 | 142 | ||
143 | thread_exit(); |
143 | thread_exit(); |
144 | /* not reached */ |
144 | /* not reached */ |
145 | } |
145 | } |
146 | 146 | ||
147 | /** Initialization and allocation for thread_t structure */ |
147 | /** Initialization and allocation for thread_t structure */ |
148 | static int thr_constructor(void *obj, int kmflags) |
148 | static int thr_constructor(void *obj, int kmflags) |
149 | { |
149 | { |
150 | thread_t *t = (thread_t *) obj; |
150 | thread_t *t = (thread_t *) obj; |
151 | 151 | ||
152 | spinlock_initialize(&t->lock, "thread_t_lock"); |
152 | spinlock_initialize(&t->lock, "thread_t_lock"); |
153 | link_initialize(&t->rq_link); |
153 | link_initialize(&t->rq_link); |
154 | link_initialize(&t->wq_link); |
154 | link_initialize(&t->wq_link); |
155 | link_initialize(&t->th_link); |
155 | link_initialize(&t->th_link); |
156 | 156 | ||
157 | /* call the architecture-specific part of the constructor */ |
157 | /* call the architecture-specific part of the constructor */ |
158 | thr_constructor_arch(t); |
158 | thr_constructor_arch(t); |
159 | 159 | ||
160 | #ifdef ARCH_HAS_FPU |
160 | #ifdef ARCH_HAS_FPU |
161 | #ifdef CONFIG_FPU_LAZY |
161 | #ifdef CONFIG_FPU_LAZY |
162 | t->saved_fpu_context = NULL; |
162 | t->saved_fpu_context = NULL; |
163 | #else |
163 | #else |
164 | t->saved_fpu_context = slab_alloc(fpu_context_slab, kmflags); |
164 | t->saved_fpu_context = slab_alloc(fpu_context_slab, kmflags); |
165 | if (!t->saved_fpu_context) |
165 | if (!t->saved_fpu_context) |
166 | return -1; |
166 | return -1; |
167 | #endif |
167 | #endif |
168 | #endif |
168 | #endif |
169 | 169 | ||
170 | t->kstack = (uint8_t *) frame_alloc(STACK_FRAMES, FRAME_KA | kmflags); |
170 | t->kstack = (uint8_t *) frame_alloc(STACK_FRAMES, FRAME_KA | kmflags); |
171 | if (!t->kstack) { |
171 | if (!t->kstack) { |
172 | #ifdef ARCH_HAS_FPU |
172 | #ifdef ARCH_HAS_FPU |
173 | if (t->saved_fpu_context) |
173 | if (t->saved_fpu_context) |
174 | slab_free(fpu_context_slab, t->saved_fpu_context); |
174 | slab_free(fpu_context_slab, t->saved_fpu_context); |
175 | #endif |
175 | #endif |
176 | return -1; |
176 | return -1; |
177 | } |
177 | } |
178 | 178 | ||
179 | return 0; |
179 | return 0; |
180 | } |
180 | } |
181 | 181 | ||
182 | /** Destruction of thread_t object */ |
182 | /** Destruction of thread_t object */ |
183 | static int thr_destructor(void *obj) |
183 | static int thr_destructor(void *obj) |
184 | { |
184 | { |
185 | thread_t *t = (thread_t *) obj; |
185 | thread_t *t = (thread_t *) obj; |
186 | 186 | ||
187 | /* call the architecture-specific part of the destructor */ |
187 | /* call the architecture-specific part of the destructor */ |
188 | thr_destructor_arch(t); |
188 | thr_destructor_arch(t); |
189 | 189 | ||
190 | frame_free(KA2PA(t->kstack)); |
190 | frame_free(KA2PA(t->kstack)); |
191 | #ifdef ARCH_HAS_FPU |
191 | #ifdef ARCH_HAS_FPU |
192 | if (t->saved_fpu_context) |
192 | if (t->saved_fpu_context) |
193 | slab_free(fpu_context_slab, t->saved_fpu_context); |
193 | slab_free(fpu_context_slab, t->saved_fpu_context); |
194 | #endif |
194 | #endif |
195 | return 1; /* One page freed */ |
195 | return 1; /* One page freed */ |
196 | } |
196 | } |
197 | 197 | ||
198 | /** Initialize threads |
198 | /** Initialize threads |
199 | * |
199 | * |
200 | * Initialize kernel threads support. |
200 | * Initialize kernel threads support. |
201 | * |
201 | * |
202 | */ |
202 | */ |
203 | void thread_init(void) |
203 | void thread_init(void) |
204 | { |
204 | { |
205 | THREAD = NULL; |
205 | THREAD = NULL; |
206 | atomic_set(&nrdy,0); |
206 | atomic_set(&nrdy,0); |
207 | thread_slab = slab_cache_create("thread_slab", sizeof(thread_t), 0, |
207 | thread_slab = slab_cache_create("thread_slab", sizeof(thread_t), 0, |
208 | thr_constructor, thr_destructor, 0); |
208 | thr_constructor, thr_destructor, 0); |
209 | 209 | ||
210 | #ifdef ARCH_HAS_FPU |
210 | #ifdef ARCH_HAS_FPU |
211 | fpu_context_slab = slab_cache_create("fpu_slab", sizeof(fpu_context_t), |
211 | fpu_context_slab = slab_cache_create("fpu_slab", sizeof(fpu_context_t), |
212 | FPU_CONTEXT_ALIGN, NULL, NULL, 0); |
212 | FPU_CONTEXT_ALIGN, NULL, NULL, 0); |
213 | #endif |
213 | #endif |
214 | 214 | ||
215 | avltree_create(&threads_tree); |
215 | avltree_create(&threads_tree); |
216 | } |
216 | } |
217 | 217 | ||
218 | /** Make thread ready |
218 | /** Make thread ready |
219 | * |
219 | * |
220 | * Switch thread t to the ready state. |
220 | * Switch thread t to the ready state. |
221 | * |
221 | * |
222 | * @param t Thread to make ready. |
222 | * @param t Thread to make ready. |
223 | * |
223 | * |
224 | */ |
224 | */ |
225 | void thread_ready(thread_t *t) |
225 | void thread_ready(thread_t *t) |
226 | { |
226 | { |
227 | cpu_t *cpu; |
227 | cpu_t *cpu; |
228 | runq_t *r; |
228 | runq_t *r; |
229 | ipl_t ipl; |
229 | ipl_t ipl; |
230 | int i, avg; |
230 | int i, avg; |
231 | 231 | ||
232 | ipl = interrupts_disable(); |
232 | ipl = interrupts_disable(); |
233 | 233 | ||
234 | spinlock_lock(&t->lock); |
234 | spinlock_lock(&t->lock); |
235 | 235 | ||
236 | ASSERT(!(t->state == Ready)); |
236 | ASSERT(!(t->state == Ready)); |
237 | 237 | ||
238 | i = (t->priority < RQ_COUNT - 1) ? ++t->priority : t->priority; |
238 | i = (t->priority < RQ_COUNT - 1) ? ++t->priority : t->priority; |
239 | 239 | ||
240 | cpu = CPU; |
240 | cpu = CPU; |
241 | if (t->flags & THREAD_FLAG_WIRED) { |
241 | if (t->flags & THREAD_FLAG_WIRED) { |
242 | ASSERT(t->cpu != NULL); |
242 | ASSERT(t->cpu != NULL); |
243 | cpu = t->cpu; |
243 | cpu = t->cpu; |
244 | } |
244 | } |
245 | t->state = Ready; |
245 | t->state = Ready; |
246 | spinlock_unlock(&t->lock); |
246 | spinlock_unlock(&t->lock); |
247 | 247 | ||
248 | /* |
248 | /* |
249 | * Append t to respective ready queue on respective processor. |
249 | * Append t to respective ready queue on respective processor. |
250 | */ |
250 | */ |
251 | r = &cpu->rq[i]; |
251 | r = &cpu->rq[i]; |
252 | spinlock_lock(&r->lock); |
252 | spinlock_lock(&r->lock); |
253 | list_append(&t->rq_link, &r->rq_head); |
253 | list_append(&t->rq_link, &r->rq_head); |
254 | r->n++; |
254 | r->n++; |
255 | spinlock_unlock(&r->lock); |
255 | spinlock_unlock(&r->lock); |
256 | 256 | ||
257 | atomic_inc(&nrdy); |
257 | atomic_inc(&nrdy); |
258 | avg = atomic_get(&nrdy) / config.cpu_active; |
258 | avg = atomic_get(&nrdy) / config.cpu_active; |
259 | atomic_inc(&cpu->nrdy); |
259 | atomic_inc(&cpu->nrdy); |
260 | 260 | ||
261 | interrupts_restore(ipl); |
261 | interrupts_restore(ipl); |
262 | } |
262 | } |
263 | 263 | ||
264 | /** Create new thread |
264 | /** Create new thread |
265 | * |
265 | * |
266 | * Create a new thread. |
266 | * Create a new thread. |
267 | * |
267 | * |
268 | * @param func Thread's implementing function. |
268 | * @param func Thread's implementing function. |
269 | * @param arg Thread's implementing function argument. |
269 | * @param arg Thread's implementing function argument. |
270 | * @param task Task to which the thread belongs. |
270 | * @param task Task to which the thread belongs. |
271 | * @param flags Thread flags. |
271 | * @param flags Thread flags. |
272 | * @param name Symbolic name. |
272 | * @param name Symbolic name. |
273 | * @param uncounted Thread's accounting doesn't affect accumulated task |
273 | * @param uncounted Thread's accounting doesn't affect accumulated task |
274 | * accounting. |
274 | * accounting. |
275 | * |
275 | * |
276 | * @return New thread's structure on success, NULL on failure. |
276 | * @return New thread's structure on success, NULL on failure. |
277 | * |
277 | * |
278 | */ |
278 | */ |
279 | thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, |
279 | thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, |
280 | int flags, char *name, bool uncounted) |
280 | int flags, char *name, bool uncounted) |
281 | { |
281 | { |
282 | thread_t *t; |
282 | thread_t *t; |
283 | ipl_t ipl; |
283 | ipl_t ipl; |
284 | 284 | ||
285 | t = (thread_t *) slab_alloc(thread_slab, 0); |
285 | t = (thread_t *) slab_alloc(thread_slab, 0); |
286 | if (!t) |
286 | if (!t) |
287 | return NULL; |
287 | return NULL; |
288 | 288 | ||
289 | /* Not needed, but good for debugging */ |
289 | /* Not needed, but good for debugging */ |
290 | memsetb((uintptr_t) t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES, |
290 | memsetb((uintptr_t) t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES, |
291 | 0); |
291 | 0); |
292 | 292 | ||
293 | ipl = interrupts_disable(); |
293 | ipl = interrupts_disable(); |
294 | spinlock_lock(&tidlock); |
294 | spinlock_lock(&tidlock); |
295 | t->tid = ++last_tid; |
295 | t->tid = ++last_tid; |
296 | spinlock_unlock(&tidlock); |
296 | spinlock_unlock(&tidlock); |
297 | interrupts_restore(ipl); |
297 | interrupts_restore(ipl); |
298 | 298 | ||
299 | context_save(&t->saved_context); |
299 | context_save(&t->saved_context); |
300 | context_set(&t->saved_context, FADDR(cushion), (uintptr_t) t->kstack, |
300 | context_set(&t->saved_context, FADDR(cushion), (uintptr_t) t->kstack, |
301 | THREAD_STACK_SIZE); |
301 | THREAD_STACK_SIZE); |
302 | 302 | ||
303 | the_initialize((the_t *) t->kstack); |
303 | the_initialize((the_t *) t->kstack); |
304 | 304 | ||
305 | ipl = interrupts_disable(); |
305 | ipl = interrupts_disable(); |
306 | t->saved_context.ipl = interrupts_read(); |
306 | t->saved_context.ipl = interrupts_read(); |
307 | interrupts_restore(ipl); |
307 | interrupts_restore(ipl); |
308 | 308 | ||
309 | memcpy(t->name, name, THREAD_NAME_BUFLEN); |
309 | memcpy(t->name, name, THREAD_NAME_BUFLEN); |
310 | 310 | ||
311 | t->thread_code = func; |
311 | t->thread_code = func; |
312 | t->thread_arg = arg; |
312 | t->thread_arg = arg; |
313 | t->ticks = -1; |
313 | t->ticks = -1; |
314 | t->cycles = 0; |
314 | t->cycles = 0; |
315 | t->uncounted = uncounted; |
315 | t->uncounted = uncounted; |
316 | t->priority = -1; /* start in rq[0] */ |
316 | t->priority = -1; /* start in rq[0] */ |
317 | t->cpu = NULL; |
317 | t->cpu = NULL; |
318 | t->flags = flags; |
318 | t->flags = flags; |
319 | t->state = Entering; |
319 | t->state = Entering; |
320 | t->call_me = NULL; |
320 | t->call_me = NULL; |
321 | t->call_me_with = NULL; |
321 | t->call_me_with = NULL; |
322 | 322 | ||
323 | timeout_initialize(&t->sleep_timeout); |
323 | timeout_initialize(&t->sleep_timeout); |
324 | t->sleep_interruptible = false; |
324 | t->sleep_interruptible = false; |
325 | t->sleep_queue = NULL; |
325 | t->sleep_queue = NULL; |
326 | t->timeout_pending = 0; |
326 | t->timeout_pending = 0; |
327 | 327 | ||
328 | t->in_copy_from_uspace = false; |
328 | t->in_copy_from_uspace = false; |
329 | t->in_copy_to_uspace = false; |
329 | t->in_copy_to_uspace = false; |
330 | 330 | ||
331 | t->interrupted = false; |
331 | t->interrupted = false; |
332 | t->detached = false; |
332 | t->detached = false; |
333 | waitq_initialize(&t->join_wq); |
333 | waitq_initialize(&t->join_wq); |
334 | 334 | ||
335 | t->rwlock_holder_type = RWLOCK_NONE; |
335 | t->rwlock_holder_type = RWLOCK_NONE; |
336 | 336 | ||
337 | t->task = task; |
337 | t->task = task; |
338 | 338 | ||
339 | t->fpu_context_exists = 0; |
339 | t->fpu_context_exists = 0; |
340 | t->fpu_context_engaged = 0; |
340 | t->fpu_context_engaged = 0; |
341 | 341 | ||
342 | avltree_node_initialize(&t->threads_tree_node); |
342 | avltree_node_initialize(&t->threads_tree_node); |
343 | t->threads_tree_node.key = (uintptr_t) t; |
343 | t->threads_tree_node.key = (uintptr_t) t; |
344 | 344 | ||
345 | /* Init debugging stuff */ |
345 | /* Init debugging stuff */ |
346 | waitq_initialize(&t->go_wq); |
346 | waitq_initialize(&t->go_wq); |
- | 347 | t->debug_go_call = NULL; |
|
347 | t->uspace_state = NULL; |
348 | t->uspace_state = NULL; |
348 | t->debug_stop = true; |
349 | t->debug_stop = true; |
349 | 350 | ||
350 | /* might depend on previous initialization */ |
351 | /* might depend on previous initialization */ |
351 | thread_create_arch(t); |
352 | thread_create_arch(t); |
352 | 353 | ||
353 | if (!(flags & THREAD_FLAG_NOATTACH)) |
354 | if (!(flags & THREAD_FLAG_NOATTACH)) |
354 | thread_attach(t, task); |
355 | thread_attach(t, task); |
355 | 356 | ||
356 | return t; |
357 | return t; |
357 | } |
358 | } |
358 | 359 | ||
359 | /** Destroy thread memory structure |
360 | /** Destroy thread memory structure |
360 | * |
361 | * |
361 | * Detach thread from all queues, cpus etc. and destroy it. |
362 | * Detach thread from all queues, cpus etc. and destroy it. |
362 | * |
363 | * |
363 | * Assume thread->lock is held!! |
364 | * Assume thread->lock is held!! |
364 | */ |
365 | */ |
365 | void thread_destroy(thread_t *t) |
366 | void thread_destroy(thread_t *t) |
366 | { |
367 | { |
367 | ASSERT(t->state == Exiting || t->state == Lingering); |
368 | ASSERT(t->state == Exiting || t->state == Lingering); |
368 | ASSERT(t->task); |
369 | ASSERT(t->task); |
369 | ASSERT(t->cpu); |
370 | ASSERT(t->cpu); |
370 | 371 | ||
371 | spinlock_lock(&t->cpu->lock); |
372 | spinlock_lock(&t->cpu->lock); |
372 | if (t->cpu->fpu_owner == t) |
373 | if (t->cpu->fpu_owner == t) |
373 | t->cpu->fpu_owner = NULL; |
374 | t->cpu->fpu_owner = NULL; |
374 | spinlock_unlock(&t->cpu->lock); |
375 | spinlock_unlock(&t->cpu->lock); |
375 | 376 | ||
376 | spinlock_unlock(&t->lock); |
377 | spinlock_unlock(&t->lock); |
377 | 378 | ||
378 | spinlock_lock(&threads_lock); |
379 | spinlock_lock(&threads_lock); |
379 | avltree_delete(&threads_tree, &t->threads_tree_node); |
380 | avltree_delete(&threads_tree, &t->threads_tree_node); |
380 | spinlock_unlock(&threads_lock); |
381 | spinlock_unlock(&threads_lock); |
381 | 382 | ||
382 | /* |
383 | /* |
383 | * Detach from the containing task. |
384 | * Detach from the containing task. |
384 | */ |
385 | */ |
385 | spinlock_lock(&t->task->lock); |
386 | spinlock_lock(&t->task->lock); |
386 | list_remove(&t->th_link); |
387 | list_remove(&t->th_link); |
387 | spinlock_unlock(&t->task->lock); |
388 | spinlock_unlock(&t->task->lock); |
388 | 389 | ||
389 | /* |
390 | /* |
390 | * t is guaranteed to be the very last thread of its task. |
391 | * t is guaranteed to be the very last thread of its task. |
391 | * It is safe to destroy the task. |
392 | * It is safe to destroy the task. |
392 | */ |
393 | */ |
393 | if (atomic_predec(&t->task->refcount) == 0) |
394 | if (atomic_predec(&t->task->refcount) == 0) |
394 | task_destroy(t->task); |
395 | task_destroy(t->task); |
395 | 396 | ||
396 | slab_free(thread_slab, t); |
397 | slab_free(thread_slab, t); |
397 | } |
398 | } |
398 | 399 | ||
399 | /** Make the thread visible to the system. |
400 | /** Make the thread visible to the system. |
400 | * |
401 | * |
401 | * Attach the thread structure to the current task and make it visible in the |
402 | * Attach the thread structure to the current task and make it visible in the |
402 | * threads_tree. |
403 | * threads_tree. |
403 | * |
404 | * |
404 | * @param t Thread to be attached to the task. |
405 | * @param t Thread to be attached to the task. |
405 | * @param task Task to which the thread is to be attached. |
406 | * @param task Task to which the thread is to be attached. |
406 | */ |
407 | */ |
407 | void thread_attach(thread_t *t, task_t *task) |
408 | void thread_attach(thread_t *t, task_t *task) |
408 | { |
409 | { |
409 | ipl_t ipl; |
410 | ipl_t ipl; |
410 | 411 | ||
411 | /* |
412 | /* |
412 | * Attach to the current task. |
413 | * Attach to the current task. |
413 | */ |
414 | */ |
414 | ipl = interrupts_disable(); |
415 | ipl = interrupts_disable(); |
415 | spinlock_lock(&task->lock); |
416 | spinlock_lock(&task->lock); |
416 | atomic_inc(&task->refcount); |
417 | atomic_inc(&task->refcount); |
417 | atomic_inc(&task->lifecount); |
418 | atomic_inc(&task->lifecount); |
418 | 419 | ||
419 | /* FIXME: this must be done very carefully.. an unstoppable |
420 | /* FIXME: this must be done very carefully.. an unstoppable |
420 | thread cannot appear just-so, it must be possible to catch it. */ |
421 | thread cannot appear just-so, it must be possible to catch it. */ |
421 | if (t->flags & THREAD_FLAG_USPACE) |
422 | if (t->flags & THREAD_FLAG_USPACE) |
422 | ++task->not_stoppable_count; |
423 | ++task->not_stoppable_count; |
423 | list_append(&t->th_link, &task->th_head); |
424 | list_append(&t->th_link, &task->th_head); |
424 | spinlock_unlock(&task->lock); |
425 | spinlock_unlock(&task->lock); |
425 | 426 | ||
426 | /* |
427 | /* |
427 | * Register this thread in the system-wide list. |
428 | * Register this thread in the system-wide list. |
428 | */ |
429 | */ |
429 | spinlock_lock(&threads_lock); |
430 | spinlock_lock(&threads_lock); |
430 | avltree_insert(&threads_tree, &t->threads_tree_node); |
431 | avltree_insert(&threads_tree, &t->threads_tree_node); |
431 | spinlock_unlock(&threads_lock); |
432 | spinlock_unlock(&threads_lock); |
432 | 433 | ||
433 | interrupts_restore(ipl); |
434 | interrupts_restore(ipl); |
434 | } |
435 | } |
435 | 436 | ||
436 | /** Terminate thread. |
437 | /** Terminate thread. |
437 | * |
438 | * |
438 | * End current thread execution and switch it to the exiting state. All pending |
439 | * End current thread execution and switch it to the exiting state. All pending |
439 | * timeouts are executed. |
440 | * timeouts are executed. |
440 | */ |
441 | */ |
441 | void thread_exit(void) |
442 | void thread_exit(void) |
442 | { |
443 | { |
443 | ipl_t ipl; |
444 | ipl_t ipl; |
444 | 445 | ||
445 | if (atomic_predec(&TASK->lifecount) == 0) { |
446 | if (atomic_predec(&TASK->lifecount) == 0) { |
446 | /* |
447 | /* |
447 | * We are the last thread in the task that still has not exited. |
448 | * We are the last thread in the task that still has not exited. |
448 | * With the exception of the moment the task was created, new |
449 | * With the exception of the moment the task was created, new |
449 | * threads can only be created by threads of the same task. |
450 | * threads can only be created by threads of the same task. |
450 | * We are safe to perform cleanup. |
451 | * We are safe to perform cleanup. |
451 | */ |
452 | */ |
452 | if (THREAD->flags & THREAD_FLAG_USPACE) { |
453 | if (THREAD->flags & THREAD_FLAG_USPACE) { |
453 | ipc_cleanup(); |
454 | ipc_cleanup(); |
454 | futex_cleanup(); |
455 | futex_cleanup(); |
455 | klog_printf("Cleanup of task %llu completed.", |
456 | klog_printf("Cleanup of task %llu completed.", |
456 | TASK->taskid); |
457 | TASK->taskid); |
457 | } |
458 | } |
458 | } |
459 | } |
459 | 460 | ||
460 | restart: |
461 | restart: |
461 | ipl = interrupts_disable(); |
462 | ipl = interrupts_disable(); |
462 | spinlock_lock(&THREAD->lock); |
463 | spinlock_lock(&THREAD->lock); |
463 | if (THREAD->timeout_pending) { |
464 | if (THREAD->timeout_pending) { |
464 | /* busy waiting for timeouts in progress */ |
465 | /* busy waiting for timeouts in progress */ |
465 | spinlock_unlock(&THREAD->lock); |
466 | spinlock_unlock(&THREAD->lock); |
466 | interrupts_restore(ipl); |
467 | interrupts_restore(ipl); |
467 | goto restart; |
468 | goto restart; |
468 | } |
469 | } |
469 | 470 | ||
470 | THREAD->state = Exiting; |
471 | THREAD->state = Exiting; |
471 | spinlock_unlock(&THREAD->lock); |
472 | spinlock_unlock(&THREAD->lock); |
472 | scheduler(); |
473 | scheduler(); |
473 | 474 | ||
474 | /* Not reached */ |
475 | /* Not reached */ |
475 | while (1) |
476 | while (1) |
476 | ; |
477 | ; |
477 | } |
478 | } |
478 | 479 | ||
479 | 480 | ||
480 | /** Thread sleep |
481 | /** Thread sleep |
481 | * |
482 | * |
482 | * Suspend execution of the current thread. |
483 | * Suspend execution of the current thread. |
483 | * |
484 | * |
484 | * @param sec Number of seconds to sleep. |
485 | * @param sec Number of seconds to sleep. |
485 | * |
486 | * |
486 | */ |
487 | */ |
487 | void thread_sleep(uint32_t sec) |
488 | void thread_sleep(uint32_t sec) |
488 | { |
489 | { |
489 | thread_usleep(sec * 1000000); |
490 | thread_usleep(sec * 1000000); |
490 | } |
491 | } |
491 | 492 | ||
492 | /** Wait for another thread to exit. |
493 | /** Wait for another thread to exit. |
493 | * |
494 | * |
494 | * @param t Thread to join on exit. |
495 | * @param t Thread to join on exit. |
495 | * @param usec Timeout in microseconds. |
496 | * @param usec Timeout in microseconds. |
496 | * @param flags Mode of operation. |
497 | * @param flags Mode of operation. |
497 | * |
498 | * |
498 | * @return An error code from errno.h or an error code from synch.h. |
499 | * @return An error code from errno.h or an error code from synch.h. |
499 | */ |
500 | */ |
500 | int thread_join_timeout(thread_t *t, uint32_t usec, int flags) |
501 | int thread_join_timeout(thread_t *t, uint32_t usec, int flags) |
501 | { |
502 | { |
502 | ipl_t ipl; |
503 | ipl_t ipl; |
503 | int rc; |
504 | int rc; |
504 | 505 | ||
505 | if (t == THREAD) |
506 | if (t == THREAD) |
506 | return EINVAL; |
507 | return EINVAL; |
507 | 508 | ||
508 | /* |
509 | /* |
509 | * Since thread join can only be called once on an undetached thread, |
510 | * Since thread join can only be called once on an undetached thread, |
510 | * the thread pointer is guaranteed to be still valid. |
511 | * the thread pointer is guaranteed to be still valid. |
511 | */ |
512 | */ |
512 | 513 | ||
513 | ipl = interrupts_disable(); |
514 | ipl = interrupts_disable(); |
514 | spinlock_lock(&t->lock); |
515 | spinlock_lock(&t->lock); |
515 | ASSERT(!t->detached); |
516 | ASSERT(!t->detached); |
516 | spinlock_unlock(&t->lock); |
517 | spinlock_unlock(&t->lock); |
517 | interrupts_restore(ipl); |
518 | interrupts_restore(ipl); |
518 | 519 | ||
519 | rc = waitq_sleep_timeout(&t->join_wq, usec, flags); |
520 | rc = waitq_sleep_timeout(&t->join_wq, usec, flags); |
520 | 521 | ||
521 | return rc; |
522 | return rc; |
522 | } |
523 | } |
523 | 524 | ||
524 | /** Detach thread. |
525 | /** Detach thread. |
525 | * |
526 | * |
526 | * Mark the thread as detached, if the thread is already in the Lingering |
527 | * Mark the thread as detached, if the thread is already in the Lingering |
527 | * state, deallocate its resources. |
528 | * state, deallocate its resources. |
528 | * |
529 | * |
529 | * @param t Thread to be detached. |
530 | * @param t Thread to be detached. |
530 | */ |
531 | */ |
531 | void thread_detach(thread_t *t) |
532 | void thread_detach(thread_t *t) |
532 | { |
533 | { |
533 | ipl_t ipl; |
534 | ipl_t ipl; |
534 | 535 | ||
535 | /* |
536 | /* |
536 | * Since the thread is expected not to be already detached, |
537 | * Since the thread is expected not to be already detached, |
537 | * pointer to it must be still valid. |
538 | * pointer to it must be still valid. |
538 | */ |
539 | */ |
539 | ipl = interrupts_disable(); |
540 | ipl = interrupts_disable(); |
540 | spinlock_lock(&t->lock); |
541 | spinlock_lock(&t->lock); |
541 | ASSERT(!t->detached); |
542 | ASSERT(!t->detached); |
542 | if (t->state == Lingering) { |
543 | if (t->state == Lingering) { |
543 | thread_destroy(t); /* unlocks &t->lock */ |
544 | thread_destroy(t); /* unlocks &t->lock */ |
544 | interrupts_restore(ipl); |
545 | interrupts_restore(ipl); |
545 | return; |
546 | return; |
546 | } else { |
547 | } else { |
547 | t->detached = true; |
548 | t->detached = true; |
548 | } |
549 | } |
549 | spinlock_unlock(&t->lock); |
550 | spinlock_unlock(&t->lock); |
550 | interrupts_restore(ipl); |
551 | interrupts_restore(ipl); |
551 | } |
552 | } |
552 | 553 | ||
553 | /** Thread usleep |
554 | /** Thread usleep |
554 | * |
555 | * |
555 | * Suspend execution of the current thread. |
556 | * Suspend execution of the current thread. |
556 | * |
557 | * |
557 | * @param usec Number of microseconds to sleep. |
558 | * @param usec Number of microseconds to sleep. |
558 | * |
559 | * |
559 | */ |
560 | */ |
560 | void thread_usleep(uint32_t usec) |
561 | void thread_usleep(uint32_t usec) |
561 | { |
562 | { |
562 | waitq_t wq; |
563 | waitq_t wq; |
563 | 564 | ||
564 | waitq_initialize(&wq); |
565 | waitq_initialize(&wq); |
565 | 566 | ||
566 | (void) waitq_sleep_timeout(&wq, usec, SYNCH_FLAGS_NON_BLOCKING); |
567 | (void) waitq_sleep_timeout(&wq, usec, SYNCH_FLAGS_NON_BLOCKING); |
567 | } |
568 | } |
568 | 569 | ||
569 | /** Register thread out-of-context invocation |
570 | /** Register thread out-of-context invocation |
570 | * |
571 | * |
571 | * Register a function and its argument to be executed |
572 | * Register a function and its argument to be executed |
572 | * on next context switch to the current thread. |
573 | * on next context switch to the current thread. |
573 | * |
574 | * |
574 | * @param call_me Out-of-context function. |
575 | * @param call_me Out-of-context function. |
575 | * @param call_me_with Out-of-context function argument. |
576 | * @param call_me_with Out-of-context function argument. |
576 | * |
577 | * |
577 | */ |
578 | */ |
578 | void thread_register_call_me(void (* call_me)(void *), void *call_me_with) |
579 | void thread_register_call_me(void (* call_me)(void *), void *call_me_with) |
579 | { |
580 | { |
580 | ipl_t ipl; |
581 | ipl_t ipl; |
581 | 582 | ||
582 | ipl = interrupts_disable(); |
583 | ipl = interrupts_disable(); |
583 | spinlock_lock(&THREAD->lock); |
584 | spinlock_lock(&THREAD->lock); |
584 | THREAD->call_me = call_me; |
585 | THREAD->call_me = call_me; |
585 | THREAD->call_me_with = call_me_with; |
586 | THREAD->call_me_with = call_me_with; |
586 | spinlock_unlock(&THREAD->lock); |
587 | spinlock_unlock(&THREAD->lock); |
587 | interrupts_restore(ipl); |
588 | interrupts_restore(ipl); |
588 | } |
589 | } |
589 | 590 | ||
590 | static bool thread_walker(avltree_node_t *node, void *arg) |
591 | static bool thread_walker(avltree_node_t *node, void *arg) |
591 | { |
592 | { |
592 | thread_t *t; |
593 | thread_t *t; |
593 | 594 | ||
594 | t = avltree_get_instance(node, thread_t, threads_tree_node); |
595 | t = avltree_get_instance(node, thread_t, threads_tree_node); |
595 | 596 | ||
596 | uint64_t cycles; |
597 | uint64_t cycles; |
597 | char suffix; |
598 | char suffix; |
598 | order(t->cycles, &cycles, &suffix); |
599 | order(t->cycles, &cycles, &suffix); |
599 | 600 | ||
600 | if (sizeof(void *) == 4) |
601 | if (sizeof(void *) == 4) |
601 | printf("%-6llu %-10s %#10zx %-8s %#10zx %-3ld %#10zx %#10zx %9llu%c ", |
602 | printf("%-6llu %-10s %#10zx %-8s %#10zx %-3ld %#10zx %#10zx %9llu%c ", |
602 | t->tid, t->name, t, thread_states[t->state], t->task, |
603 | t->tid, t->name, t, thread_states[t->state], t->task, |
603 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
604 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
604 | else |
605 | else |
605 | printf("%-6llu %-10s %#18zx %-8s %#18zx %-3ld %#18zx %#18zx %9llu%c ", |
606 | printf("%-6llu %-10s %#18zx %-8s %#18zx %-3ld %#18zx %#18zx %9llu%c ", |
606 | t->tid, t->name, t, thread_states[t->state], t->task, |
607 | t->tid, t->name, t, thread_states[t->state], t->task, |
607 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
608 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
608 | 609 | ||
609 | if (t->cpu) |
610 | if (t->cpu) |
610 | printf("%-4zd", t->cpu->id); |
611 | printf("%-4zd", t->cpu->id); |
611 | else |
612 | else |
612 | printf("none"); |
613 | printf("none"); |
613 | 614 | ||
614 | if (t->state == Sleeping) { |
615 | if (t->state == Sleeping) { |
615 | if (sizeof(uintptr_t) == 4) |
616 | if (sizeof(uintptr_t) == 4) |
616 | printf(" %#10zx", t->sleep_queue); |
617 | printf(" %#10zx", t->sleep_queue); |
617 | else |
618 | else |
618 | printf(" %#18zx", t->sleep_queue); |
619 | printf(" %#18zx", t->sleep_queue); |
619 | } |
620 | } |
620 | 621 | ||
621 | printf("\n"); |
622 | printf("\n"); |
622 | 623 | ||
623 | return true; |
624 | return true; |
624 | } |
625 | } |
625 | 626 | ||
626 | /** Print list of threads debug info */ |
627 | /** Print list of threads debug info */ |
627 | void thread_print_list(void) |
628 | void thread_print_list(void) |
628 | { |
629 | { |
629 | ipl_t ipl; |
630 | ipl_t ipl; |
630 | 631 | ||
631 | /* Messing with thread structures, avoid deadlock */ |
632 | /* Messing with thread structures, avoid deadlock */ |
632 | ipl = interrupts_disable(); |
633 | ipl = interrupts_disable(); |
633 | spinlock_lock(&threads_lock); |
634 | spinlock_lock(&threads_lock); |
634 | 635 | ||
635 | if (sizeof(uintptr_t) == 4) { |
636 | if (sizeof(uintptr_t) == 4) { |
636 | printf("tid name address state task " |
637 | printf("tid name address state task " |
637 | "ctx code stack cycles cpu " |
638 | "ctx code stack cycles cpu " |
638 | "waitqueue\n"); |
639 | "waitqueue\n"); |
639 | printf("------ ---------- ---------- -------- ---------- " |
640 | printf("------ ---------- ---------- -------- ---------- " |
640 | "--- ---------- ---------- ---------- ---- " |
641 | "--- ---------- ---------- ---------- ---- " |
641 | "----------\n"); |
642 | "----------\n"); |
642 | } else { |
643 | } else { |
643 | printf("tid name address state task " |
644 | printf("tid name address state task " |
644 | "ctx code stack cycles cpu " |
645 | "ctx code stack cycles cpu " |
645 | "waitqueue\n"); |
646 | "waitqueue\n"); |
646 | printf("------ ---------- ------------------ -------- ------------------ " |
647 | printf("------ ---------- ------------------ -------- ------------------ " |
647 | "--- ------------------ ------------------ ---------- ---- " |
648 | "--- ------------------ ------------------ ---------- ---- " |
648 | "------------------\n"); |
649 | "------------------\n"); |
649 | } |
650 | } |
650 | 651 | ||
651 | avltree_walk(&threads_tree, thread_walker, NULL); |
652 | avltree_walk(&threads_tree, thread_walker, NULL); |
652 | 653 | ||
653 | spinlock_unlock(&threads_lock); |
654 | spinlock_unlock(&threads_lock); |
654 | interrupts_restore(ipl); |
655 | interrupts_restore(ipl); |
655 | } |
656 | } |
656 | 657 | ||
657 | /** Check whether thread exists. |
658 | /** Check whether thread exists. |
658 | * |
659 | * |
659 | * Note that threads_lock must be already held and |
660 | * Note that threads_lock must be already held and |
660 | * interrupts must be already disabled. |
661 | * interrupts must be already disabled. |
661 | * |
662 | * |
662 | * @param t Pointer to thread. |
663 | * @param t Pointer to thread. |
663 | * |
664 | * |
664 | * @return True if thread t is known to the system, false otherwise. |
665 | * @return True if thread t is known to the system, false otherwise. |
665 | */ |
666 | */ |
666 | bool thread_exists(thread_t *t) |
667 | bool thread_exists(thread_t *t) |
667 | { |
668 | { |
668 | avltree_node_t *node; |
669 | avltree_node_t *node; |
669 | 670 | ||
670 | node = avltree_search(&threads_tree, (avltree_key_t) ((uintptr_t) t)); |
671 | node = avltree_search(&threads_tree, (avltree_key_t) ((uintptr_t) t)); |
671 | 672 | ||
672 | return node != NULL; |
673 | return node != NULL; |
673 | } |
674 | } |
674 | 675 | ||
675 | 676 | ||
676 | /** Update accounting of current thread. |
677 | /** Update accounting of current thread. |
677 | * |
678 | * |
678 | * Note that thread_lock on THREAD must be already held and |
679 | * Note that thread_lock on THREAD must be already held and |
679 | * interrupts must be already disabled. |
680 | * interrupts must be already disabled. |
680 | * |
681 | * |
681 | */ |
682 | */ |
682 | void thread_update_accounting(void) |
683 | void thread_update_accounting(void) |
683 | { |
684 | { |
684 | uint64_t time = get_cycle(); |
685 | uint64_t time = get_cycle(); |
685 | THREAD->cycles += time - THREAD->last_cycle; |
686 | THREAD->cycles += time - THREAD->last_cycle; |
686 | THREAD->last_cycle = time; |
687 | THREAD->last_cycle = time; |
687 | } |
688 | } |
688 | 689 | ||
689 | /** Process syscall to create new thread. |
690 | /** Process syscall to create new thread. |
690 | * |
691 | * |
691 | */ |
692 | */ |
692 | unative_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name, |
693 | unative_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name, |
693 | thread_id_t *uspace_thread_id) |
694 | thread_id_t *uspace_thread_id) |
694 | { |
695 | { |
695 | thread_t *t; |
696 | thread_t *t; |
696 | char namebuf[THREAD_NAME_BUFLEN]; |
697 | char namebuf[THREAD_NAME_BUFLEN]; |
697 | uspace_arg_t *kernel_uarg; |
698 | uspace_arg_t *kernel_uarg; |
698 | int rc; |
699 | int rc; |
699 | 700 | ||
700 | rc = copy_from_uspace(namebuf, uspace_name, THREAD_NAME_BUFLEN); |
701 | rc = copy_from_uspace(namebuf, uspace_name, THREAD_NAME_BUFLEN); |
701 | if (rc != 0) |
702 | if (rc != 0) |
702 | return (unative_t) rc; |
703 | return (unative_t) rc; |
703 | 704 | ||
704 | /* |
705 | /* |
705 | * In case of failure, kernel_uarg will be deallocated in this function. |
706 | * In case of failure, kernel_uarg will be deallocated in this function. |
706 | * In case of success, kernel_uarg will be freed in uinit(). |
707 | * In case of success, kernel_uarg will be freed in uinit(). |
707 | */ |
708 | */ |
708 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
709 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
709 | 710 | ||
710 | rc = copy_from_uspace(kernel_uarg, uspace_uarg, sizeof(uspace_arg_t)); |
711 | rc = copy_from_uspace(kernel_uarg, uspace_uarg, sizeof(uspace_arg_t)); |
711 | if (rc != 0) { |
712 | if (rc != 0) { |
712 | free(kernel_uarg); |
713 | free(kernel_uarg); |
713 | return (unative_t) rc; |
714 | return (unative_t) rc; |
714 | } |
715 | } |
715 | 716 | ||
716 | t = thread_create(uinit, kernel_uarg, TASK, |
717 | t = thread_create(uinit, kernel_uarg, TASK, |
717 | THREAD_FLAG_USPACE | THREAD_FLAG_NOATTACH, namebuf, false); |
718 | THREAD_FLAG_USPACE | THREAD_FLAG_NOATTACH, namebuf, false); |
718 | if (t) { |
719 | if (t) { |
719 | if (uspace_thread_id != NULL) { |
720 | if (uspace_thread_id != NULL) { |
720 | int rc; |
721 | int rc; |
721 | 722 | ||
722 | rc = copy_to_uspace(uspace_thread_id, &t->tid, |
723 | rc = copy_to_uspace(uspace_thread_id, &t->tid, |
723 | sizeof(t->tid)); |
724 | sizeof(t->tid)); |
724 | if (rc != 0) { |
725 | if (rc != 0) { |
725 | /* |
726 | /* |
726 | * We have encountered a failure, but the thread |
727 | * We have encountered a failure, but the thread |
727 | * has already been created. We need to undo its |
728 | * has already been created. We need to undo its |
728 | * creation now. |
729 | * creation now. |
729 | */ |
730 | */ |
730 | 731 | ||
731 | /* |
732 | /* |
732 | * The new thread structure is initialized, but |
733 | * The new thread structure is initialized, but |
733 | * is still not visible to the system. |
734 | * is still not visible to the system. |
734 | * We can safely deallocate it. |
735 | * We can safely deallocate it. |
735 | */ |
736 | */ |
736 | slab_free(thread_slab, t); |
737 | slab_free(thread_slab, t); |
737 | free(kernel_uarg); |
738 | free(kernel_uarg); |
738 | 739 | ||
739 | return (unative_t) rc; |
740 | return (unative_t) rc; |
740 | } |
741 | } |
741 | } |
742 | } |
742 | thread_attach(t, TASK); |
743 | thread_attach(t, TASK); |
743 | thread_ready(t); |
744 | thread_ready(t); |
744 | 745 | ||
745 | return 0; |
746 | return 0; |
746 | } else |
747 | } else |
747 | free(kernel_uarg); |
748 | free(kernel_uarg); |
748 | 749 | ||
749 | return (unative_t) ENOMEM; |
750 | return (unative_t) ENOMEM; |
750 | } |
751 | } |
751 | 752 | ||
752 | /** Process syscall to terminate thread. |
753 | /** Process syscall to terminate thread. |
753 | * |
754 | * |
754 | */ |
755 | */ |
755 | unative_t sys_thread_exit(int uspace_status) |
756 | unative_t sys_thread_exit(int uspace_status) |
756 | { |
757 | { |
757 | thread_exit(); |
758 | thread_exit(); |
758 | /* Unreachable */ |
759 | /* Unreachable */ |
759 | return 0; |
760 | return 0; |
760 | } |
761 | } |
761 | 762 | ||
762 | /** Syscall for getting TID. |
763 | /** Syscall for getting TID. |
763 | * |
764 | * |
764 | * @param uspace_thread_id Userspace address of 8-byte buffer where to store |
765 | * @param uspace_thread_id Userspace address of 8-byte buffer where to store |
765 | * current thread ID. |
766 | * current thread ID. |
766 | * |
767 | * |
767 | * @return 0 on success or an error code from @ref errno.h. |
768 | * @return 0 on success or an error code from @ref errno.h. |
768 | */ |
769 | */ |
769 | unative_t sys_thread_get_id(thread_id_t *uspace_thread_id) |
770 | unative_t sys_thread_get_id(thread_id_t *uspace_thread_id) |
770 | { |
771 | { |
771 | /* |
772 | /* |
772 | * No need to acquire lock on THREAD because tid |
773 | * No need to acquire lock on THREAD because tid |
773 | * remains constant for the lifespan of the thread. |
774 | * remains constant for the lifespan of the thread. |
774 | */ |
775 | */ |
775 | return (unative_t) copy_to_uspace(uspace_thread_id, &THREAD->tid, |
776 | return (unative_t) copy_to_uspace(uspace_thread_id, &THREAD->tid, |
776 | sizeof(THREAD->tid)); |
777 | sizeof(THREAD->tid)); |
777 | } |
778 | } |
778 | 779 | ||
779 | /** @} |
780 | /** @} |
780 | */ |
781 | */ |
781 | 782 |