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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 | waitq_initialize(&t->go_wq); |
345 | waitq_initialize(&t->go_wq); |
346 | 346 | ||
347 | /* might depend on previous initialization */ |
347 | /* might depend on previous initialization */ |
348 | thread_create_arch(t); |
348 | thread_create_arch(t); |
349 | 349 | ||
350 | if (!(flags & THREAD_FLAG_NOATTACH)) |
350 | if (!(flags & THREAD_FLAG_NOATTACH)) |
351 | thread_attach(t, task); |
351 | thread_attach(t, task); |
352 | 352 | ||
353 | return t; |
353 | return t; |
354 | } |
354 | } |
355 | 355 | ||
356 | /** Destroy thread memory structure |
356 | /** Destroy thread memory structure |
357 | * |
357 | * |
358 | * Detach thread from all queues, cpus etc. and destroy it. |
358 | * Detach thread from all queues, cpus etc. and destroy it. |
359 | * |
359 | * |
360 | * Assume thread->lock is held!! |
360 | * Assume thread->lock is held!! |
361 | */ |
361 | */ |
362 | void thread_destroy(thread_t *t) |
362 | void thread_destroy(thread_t *t) |
363 | { |
363 | { |
364 | ASSERT(t->state == Exiting || t->state == Lingering); |
364 | ASSERT(t->state == Exiting || t->state == Lingering); |
365 | ASSERT(t->task); |
365 | ASSERT(t->task); |
366 | ASSERT(t->cpu); |
366 | ASSERT(t->cpu); |
367 | 367 | ||
368 | spinlock_lock(&t->cpu->lock); |
368 | spinlock_lock(&t->cpu->lock); |
369 | if (t->cpu->fpu_owner == t) |
369 | if (t->cpu->fpu_owner == t) |
370 | t->cpu->fpu_owner = NULL; |
370 | t->cpu->fpu_owner = NULL; |
371 | spinlock_unlock(&t->cpu->lock); |
371 | spinlock_unlock(&t->cpu->lock); |
372 | 372 | ||
373 | spinlock_unlock(&t->lock); |
373 | spinlock_unlock(&t->lock); |
374 | 374 | ||
375 | spinlock_lock(&threads_lock); |
375 | spinlock_lock(&threads_lock); |
376 | avltree_delete(&threads_tree, &t->threads_tree_node); |
376 | avltree_delete(&threads_tree, &t->threads_tree_node); |
377 | spinlock_unlock(&threads_lock); |
377 | spinlock_unlock(&threads_lock); |
378 | 378 | ||
379 | /* |
379 | /* |
380 | * Detach from the containing task. |
380 | * Detach from the containing task. |
381 | */ |
381 | */ |
382 | spinlock_lock(&t->task->lock); |
382 | spinlock_lock(&t->task->lock); |
383 | list_remove(&t->th_link); |
383 | list_remove(&t->th_link); |
384 | spinlock_unlock(&t->task->lock); |
384 | spinlock_unlock(&t->task->lock); |
385 | 385 | ||
386 | /* |
386 | /* |
387 | * t is guaranteed to be the very last thread of its task. |
387 | * t is guaranteed to be the very last thread of its task. |
388 | * It is safe to destroy the task. |
388 | * It is safe to destroy the task. |
389 | */ |
389 | */ |
390 | if (atomic_predec(&t->task->refcount) == 0) |
390 | if (atomic_predec(&t->task->refcount) == 0) |
391 | task_destroy(t->task); |
391 | task_destroy(t->task); |
392 | 392 | ||
393 | slab_free(thread_slab, t); |
393 | slab_free(thread_slab, t); |
394 | } |
394 | } |
395 | 395 | ||
396 | /** Make the thread visible to the system. |
396 | /** Make the thread visible to the system. |
397 | * |
397 | * |
398 | * Attach the thread structure to the current task and make it visible in the |
398 | * Attach the thread structure to the current task and make it visible in the |
399 | * threads_tree. |
399 | * threads_tree. |
400 | * |
400 | * |
401 | * @param t Thread to be attached to the task. |
401 | * @param t Thread to be attached to the task. |
402 | * @param task Task to which the thread is to be attached. |
402 | * @param task Task to which the thread is to be attached. |
403 | */ |
403 | */ |
404 | void thread_attach(thread_t *t, task_t *task) |
404 | void thread_attach(thread_t *t, task_t *task) |
405 | { |
405 | { |
406 | ipl_t ipl; |
406 | ipl_t ipl; |
407 | 407 | ||
408 | /* |
408 | /* |
409 | * Attach to the current task. |
409 | * Attach to the current task. |
410 | */ |
410 | */ |
411 | ipl = interrupts_disable(); |
411 | ipl = interrupts_disable(); |
412 | spinlock_lock(&task->lock); |
412 | spinlock_lock(&task->lock); |
413 | atomic_inc(&task->refcount); |
413 | atomic_inc(&task->refcount); |
414 | atomic_inc(&task->lifecount); |
414 | atomic_inc(&task->lifecount); |
- | 415 | ||
- | 416 | /* FIXME: this must be done very carefully.. an unstoppable |
|
- | 417 | thread cannot appear just-so, it must be possible to catch it. */ |
|
- | 418 | if (t->flags & THREAD_FLAG_USPACE) |
|
415 | ++task->not_stoppable_count; |
419 | ++task->not_stoppable_count; |
416 | list_append(&t->th_link, &task->th_head); |
420 | list_append(&t->th_link, &task->th_head); |
417 | spinlock_unlock(&task->lock); |
421 | spinlock_unlock(&task->lock); |
418 | 422 | ||
419 | /* |
423 | /* |
420 | * Register this thread in the system-wide list. |
424 | * Register this thread in the system-wide list. |
421 | */ |
425 | */ |
422 | spinlock_lock(&threads_lock); |
426 | spinlock_lock(&threads_lock); |
423 | avltree_insert(&threads_tree, &t->threads_tree_node); |
427 | avltree_insert(&threads_tree, &t->threads_tree_node); |
424 | spinlock_unlock(&threads_lock); |
428 | spinlock_unlock(&threads_lock); |
425 | 429 | ||
426 | interrupts_restore(ipl); |
430 | interrupts_restore(ipl); |
427 | } |
431 | } |
428 | 432 | ||
429 | /** Terminate thread. |
433 | /** Terminate thread. |
430 | * |
434 | * |
431 | * End current thread execution and switch it to the exiting state. All pending |
435 | * End current thread execution and switch it to the exiting state. All pending |
432 | * timeouts are executed. |
436 | * timeouts are executed. |
433 | */ |
437 | */ |
434 | void thread_exit(void) |
438 | void thread_exit(void) |
435 | { |
439 | { |
436 | ipl_t ipl; |
440 | ipl_t ipl; |
437 | 441 | ||
438 | if (atomic_predec(&TASK->lifecount) == 0) { |
442 | if (atomic_predec(&TASK->lifecount) == 0) { |
439 | /* |
443 | /* |
440 | * We are the last thread in the task that still has not exited. |
444 | * We are the last thread in the task that still has not exited. |
441 | * With the exception of the moment the task was created, new |
445 | * With the exception of the moment the task was created, new |
442 | * threads can only be created by threads of the same task. |
446 | * threads can only be created by threads of the same task. |
443 | * We are safe to perform cleanup. |
447 | * We are safe to perform cleanup. |
444 | */ |
448 | */ |
445 | if (THREAD->flags & THREAD_FLAG_USPACE) { |
449 | if (THREAD->flags & THREAD_FLAG_USPACE) { |
446 | ipc_cleanup(); |
450 | ipc_cleanup(); |
447 | futex_cleanup(); |
451 | futex_cleanup(); |
448 | klog_printf("Cleanup of task %llu completed.", |
452 | klog_printf("Cleanup of task %llu completed.", |
449 | TASK->taskid); |
453 | TASK->taskid); |
450 | } |
454 | } |
451 | } |
455 | } |
452 | 456 | ||
453 | restart: |
457 | restart: |
454 | ipl = interrupts_disable(); |
458 | ipl = interrupts_disable(); |
455 | spinlock_lock(&THREAD->lock); |
459 | spinlock_lock(&THREAD->lock); |
456 | if (THREAD->timeout_pending) { |
460 | if (THREAD->timeout_pending) { |
457 | /* busy waiting for timeouts in progress */ |
461 | /* busy waiting for timeouts in progress */ |
458 | spinlock_unlock(&THREAD->lock); |
462 | spinlock_unlock(&THREAD->lock); |
459 | interrupts_restore(ipl); |
463 | interrupts_restore(ipl); |
460 | goto restart; |
464 | goto restart; |
461 | } |
465 | } |
462 | 466 | ||
463 | THREAD->state = Exiting; |
467 | THREAD->state = Exiting; |
464 | spinlock_unlock(&THREAD->lock); |
468 | spinlock_unlock(&THREAD->lock); |
465 | scheduler(); |
469 | scheduler(); |
466 | 470 | ||
467 | /* Not reached */ |
471 | /* Not reached */ |
468 | while (1) |
472 | while (1) |
469 | ; |
473 | ; |
470 | } |
474 | } |
471 | 475 | ||
472 | 476 | ||
473 | /** Thread sleep |
477 | /** Thread sleep |
474 | * |
478 | * |
475 | * Suspend execution of the current thread. |
479 | * Suspend execution of the current thread. |
476 | * |
480 | * |
477 | * @param sec Number of seconds to sleep. |
481 | * @param sec Number of seconds to sleep. |
478 | * |
482 | * |
479 | */ |
483 | */ |
480 | void thread_sleep(uint32_t sec) |
484 | void thread_sleep(uint32_t sec) |
481 | { |
485 | { |
482 | thread_usleep(sec * 1000000); |
486 | thread_usleep(sec * 1000000); |
483 | } |
487 | } |
484 | 488 | ||
485 | /** Wait for another thread to exit. |
489 | /** Wait for another thread to exit. |
486 | * |
490 | * |
487 | * @param t Thread to join on exit. |
491 | * @param t Thread to join on exit. |
488 | * @param usec Timeout in microseconds. |
492 | * @param usec Timeout in microseconds. |
489 | * @param flags Mode of operation. |
493 | * @param flags Mode of operation. |
490 | * |
494 | * |
491 | * @return An error code from errno.h or an error code from synch.h. |
495 | * @return An error code from errno.h or an error code from synch.h. |
492 | */ |
496 | */ |
493 | int thread_join_timeout(thread_t *t, uint32_t usec, int flags) |
497 | int thread_join_timeout(thread_t *t, uint32_t usec, int flags) |
494 | { |
498 | { |
495 | ipl_t ipl; |
499 | ipl_t ipl; |
496 | int rc; |
500 | int rc; |
497 | 501 | ||
498 | if (t == THREAD) |
502 | if (t == THREAD) |
499 | return EINVAL; |
503 | return EINVAL; |
500 | 504 | ||
501 | /* |
505 | /* |
502 | * Since thread join can only be called once on an undetached thread, |
506 | * Since thread join can only be called once on an undetached thread, |
503 | * the thread pointer is guaranteed to be still valid. |
507 | * the thread pointer is guaranteed to be still valid. |
504 | */ |
508 | */ |
505 | 509 | ||
506 | ipl = interrupts_disable(); |
510 | ipl = interrupts_disable(); |
507 | spinlock_lock(&t->lock); |
511 | spinlock_lock(&t->lock); |
508 | ASSERT(!t->detached); |
512 | ASSERT(!t->detached); |
509 | spinlock_unlock(&t->lock); |
513 | spinlock_unlock(&t->lock); |
510 | interrupts_restore(ipl); |
514 | interrupts_restore(ipl); |
511 | 515 | ||
512 | rc = waitq_sleep_timeout(&t->join_wq, usec, flags); |
516 | rc = waitq_sleep_timeout(&t->join_wq, usec, flags); |
513 | 517 | ||
514 | return rc; |
518 | return rc; |
515 | } |
519 | } |
516 | 520 | ||
517 | /** Detach thread. |
521 | /** Detach thread. |
518 | * |
522 | * |
519 | * Mark the thread as detached, if the thread is already in the Lingering |
523 | * Mark the thread as detached, if the thread is already in the Lingering |
520 | * state, deallocate its resources. |
524 | * state, deallocate its resources. |
521 | * |
525 | * |
522 | * @param t Thread to be detached. |
526 | * @param t Thread to be detached. |
523 | */ |
527 | */ |
524 | void thread_detach(thread_t *t) |
528 | void thread_detach(thread_t *t) |
525 | { |
529 | { |
526 | ipl_t ipl; |
530 | ipl_t ipl; |
527 | 531 | ||
528 | /* |
532 | /* |
529 | * Since the thread is expected not to be already detached, |
533 | * Since the thread is expected not to be already detached, |
530 | * pointer to it must be still valid. |
534 | * pointer to it must be still valid. |
531 | */ |
535 | */ |
532 | ipl = interrupts_disable(); |
536 | ipl = interrupts_disable(); |
533 | spinlock_lock(&t->lock); |
537 | spinlock_lock(&t->lock); |
534 | ASSERT(!t->detached); |
538 | ASSERT(!t->detached); |
535 | if (t->state == Lingering) { |
539 | if (t->state == Lingering) { |
536 | thread_destroy(t); /* unlocks &t->lock */ |
540 | thread_destroy(t); /* unlocks &t->lock */ |
537 | interrupts_restore(ipl); |
541 | interrupts_restore(ipl); |
538 | return; |
542 | return; |
539 | } else { |
543 | } else { |
540 | t->detached = true; |
544 | t->detached = true; |
541 | } |
545 | } |
542 | spinlock_unlock(&t->lock); |
546 | spinlock_unlock(&t->lock); |
543 | interrupts_restore(ipl); |
547 | interrupts_restore(ipl); |
544 | } |
548 | } |
545 | 549 | ||
546 | /** Thread usleep |
550 | /** Thread usleep |
547 | * |
551 | * |
548 | * Suspend execution of the current thread. |
552 | * Suspend execution of the current thread. |
549 | * |
553 | * |
550 | * @param usec Number of microseconds to sleep. |
554 | * @param usec Number of microseconds to sleep. |
551 | * |
555 | * |
552 | */ |
556 | */ |
553 | void thread_usleep(uint32_t usec) |
557 | void thread_usleep(uint32_t usec) |
554 | { |
558 | { |
555 | waitq_t wq; |
559 | waitq_t wq; |
556 | 560 | ||
557 | waitq_initialize(&wq); |
561 | waitq_initialize(&wq); |
558 | 562 | ||
559 | (void) waitq_sleep_timeout(&wq, usec, SYNCH_FLAGS_NON_BLOCKING); |
563 | (void) waitq_sleep_timeout(&wq, usec, SYNCH_FLAGS_NON_BLOCKING); |
560 | } |
564 | } |
561 | 565 | ||
562 | /** Register thread out-of-context invocation |
566 | /** Register thread out-of-context invocation |
563 | * |
567 | * |
564 | * Register a function and its argument to be executed |
568 | * Register a function and its argument to be executed |
565 | * on next context switch to the current thread. |
569 | * on next context switch to the current thread. |
566 | * |
570 | * |
567 | * @param call_me Out-of-context function. |
571 | * @param call_me Out-of-context function. |
568 | * @param call_me_with Out-of-context function argument. |
572 | * @param call_me_with Out-of-context function argument. |
569 | * |
573 | * |
570 | */ |
574 | */ |
571 | void thread_register_call_me(void (* call_me)(void *), void *call_me_with) |
575 | void thread_register_call_me(void (* call_me)(void *), void *call_me_with) |
572 | { |
576 | { |
573 | ipl_t ipl; |
577 | ipl_t ipl; |
574 | 578 | ||
575 | ipl = interrupts_disable(); |
579 | ipl = interrupts_disable(); |
576 | spinlock_lock(&THREAD->lock); |
580 | spinlock_lock(&THREAD->lock); |
577 | THREAD->call_me = call_me; |
581 | THREAD->call_me = call_me; |
578 | THREAD->call_me_with = call_me_with; |
582 | THREAD->call_me_with = call_me_with; |
579 | spinlock_unlock(&THREAD->lock); |
583 | spinlock_unlock(&THREAD->lock); |
580 | interrupts_restore(ipl); |
584 | interrupts_restore(ipl); |
581 | } |
585 | } |
582 | 586 | ||
583 | static bool thread_walker(avltree_node_t *node, void *arg) |
587 | static bool thread_walker(avltree_node_t *node, void *arg) |
584 | { |
588 | { |
585 | thread_t *t; |
589 | thread_t *t; |
586 | 590 | ||
587 | t = avltree_get_instance(node, thread_t, threads_tree_node); |
591 | t = avltree_get_instance(node, thread_t, threads_tree_node); |
588 | 592 | ||
589 | uint64_t cycles; |
593 | uint64_t cycles; |
590 | char suffix; |
594 | char suffix; |
591 | order(t->cycles, &cycles, &suffix); |
595 | order(t->cycles, &cycles, &suffix); |
592 | 596 | ||
593 | if (sizeof(void *) == 4) |
597 | if (sizeof(void *) == 4) |
594 | printf("%-6llu %-10s %#10zx %-8s %#10zx %-3ld %#10zx %#10zx %9llu%c ", |
598 | printf("%-6llu %-10s %#10zx %-8s %#10zx %-3ld %#10zx %#10zx %9llu%c ", |
595 | t->tid, t->name, t, thread_states[t->state], t->task, |
599 | t->tid, t->name, t, thread_states[t->state], t->task, |
596 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
600 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
597 | else |
601 | else |
598 | printf("%-6llu %-10s %#18zx %-8s %#18zx %-3ld %#18zx %#18zx %9llu%c ", |
602 | printf("%-6llu %-10s %#18zx %-8s %#18zx %-3ld %#18zx %#18zx %9llu%c ", |
599 | t->tid, t->name, t, thread_states[t->state], t->task, |
603 | t->tid, t->name, t, thread_states[t->state], t->task, |
600 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
604 | t->task->context, t->thread_code, t->kstack, cycles, suffix); |
601 | 605 | ||
602 | if (t->cpu) |
606 | if (t->cpu) |
603 | printf("%-4zd", t->cpu->id); |
607 | printf("%-4zd", t->cpu->id); |
604 | else |
608 | else |
605 | printf("none"); |
609 | printf("none"); |
606 | 610 | ||
607 | if (t->state == Sleeping) { |
611 | if (t->state == Sleeping) { |
608 | if (sizeof(uintptr_t) == 4) |
612 | if (sizeof(uintptr_t) == 4) |
609 | printf(" %#10zx", t->sleep_queue); |
613 | printf(" %#10zx", t->sleep_queue); |
610 | else |
614 | else |
611 | printf(" %#18zx", t->sleep_queue); |
615 | printf(" %#18zx", t->sleep_queue); |
612 | } |
616 | } |
613 | 617 | ||
614 | printf("\n"); |
618 | printf("\n"); |
615 | 619 | ||
616 | return true; |
620 | return true; |
617 | } |
621 | } |
618 | 622 | ||
619 | /** Print list of threads debug info */ |
623 | /** Print list of threads debug info */ |
620 | void thread_print_list(void) |
624 | void thread_print_list(void) |
621 | { |
625 | { |
622 | ipl_t ipl; |
626 | ipl_t ipl; |
623 | 627 | ||
624 | /* Messing with thread structures, avoid deadlock */ |
628 | /* Messing with thread structures, avoid deadlock */ |
625 | ipl = interrupts_disable(); |
629 | ipl = interrupts_disable(); |
626 | spinlock_lock(&threads_lock); |
630 | spinlock_lock(&threads_lock); |
627 | 631 | ||
628 | if (sizeof(uintptr_t) == 4) { |
632 | if (sizeof(uintptr_t) == 4) { |
629 | printf("tid name address state task " |
633 | printf("tid name address state task " |
630 | "ctx code stack cycles cpu " |
634 | "ctx code stack cycles cpu " |
631 | "waitqueue\n"); |
635 | "waitqueue\n"); |
632 | printf("------ ---------- ---------- -------- ---------- " |
636 | printf("------ ---------- ---------- -------- ---------- " |
633 | "--- ---------- ---------- ---------- ---- " |
637 | "--- ---------- ---------- ---------- ---- " |
634 | "----------\n"); |
638 | "----------\n"); |
635 | } else { |
639 | } else { |
636 | printf("tid name address state task " |
640 | printf("tid name address state task " |
637 | "ctx code stack cycles cpu " |
641 | "ctx code stack cycles cpu " |
638 | "waitqueue\n"); |
642 | "waitqueue\n"); |
639 | printf("------ ---------- ------------------ -------- ------------------ " |
643 | printf("------ ---------- ------------------ -------- ------------------ " |
640 | "--- ------------------ ------------------ ---------- ---- " |
644 | "--- ------------------ ------------------ ---------- ---- " |
641 | "------------------\n"); |
645 | "------------------\n"); |
642 | } |
646 | } |
643 | 647 | ||
644 | avltree_walk(&threads_tree, thread_walker, NULL); |
648 | avltree_walk(&threads_tree, thread_walker, NULL); |
645 | 649 | ||
646 | spinlock_unlock(&threads_lock); |
650 | spinlock_unlock(&threads_lock); |
647 | interrupts_restore(ipl); |
651 | interrupts_restore(ipl); |
648 | } |
652 | } |
649 | 653 | ||
650 | /** Check whether thread exists. |
654 | /** Check whether thread exists. |
651 | * |
655 | * |
652 | * Note that threads_lock must be already held and |
656 | * Note that threads_lock must be already held and |
653 | * interrupts must be already disabled. |
657 | * interrupts must be already disabled. |
654 | * |
658 | * |
655 | * @param t Pointer to thread. |
659 | * @param t Pointer to thread. |
656 | * |
660 | * |
657 | * @return True if thread t is known to the system, false otherwise. |
661 | * @return True if thread t is known to the system, false otherwise. |
658 | */ |
662 | */ |
659 | bool thread_exists(thread_t *t) |
663 | bool thread_exists(thread_t *t) |
660 | { |
664 | { |
661 | avltree_node_t *node; |
665 | avltree_node_t *node; |
662 | 666 | ||
663 | node = avltree_search(&threads_tree, (avltree_key_t) ((uintptr_t) t)); |
667 | node = avltree_search(&threads_tree, (avltree_key_t) ((uintptr_t) t)); |
664 | 668 | ||
665 | return node != NULL; |
669 | return node != NULL; |
666 | } |
670 | } |
667 | 671 | ||
668 | 672 | ||
669 | /** Update accounting of current thread. |
673 | /** Update accounting of current thread. |
670 | * |
674 | * |
671 | * Note that thread_lock on THREAD must be already held and |
675 | * Note that thread_lock on THREAD must be already held and |
672 | * interrupts must be already disabled. |
676 | * interrupts must be already disabled. |
673 | * |
677 | * |
674 | */ |
678 | */ |
675 | void thread_update_accounting(void) |
679 | void thread_update_accounting(void) |
676 | { |
680 | { |
677 | uint64_t time = get_cycle(); |
681 | uint64_t time = get_cycle(); |
678 | THREAD->cycles += time - THREAD->last_cycle; |
682 | THREAD->cycles += time - THREAD->last_cycle; |
679 | THREAD->last_cycle = time; |
683 | THREAD->last_cycle = time; |
680 | } |
684 | } |
681 | 685 | ||
682 | /** Process syscall to create new thread. |
686 | /** Process syscall to create new thread. |
683 | * |
687 | * |
684 | */ |
688 | */ |
685 | unative_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name, |
689 | unative_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name, |
686 | thread_id_t *uspace_thread_id) |
690 | thread_id_t *uspace_thread_id) |
687 | { |
691 | { |
688 | thread_t *t; |
692 | thread_t *t; |
689 | char namebuf[THREAD_NAME_BUFLEN]; |
693 | char namebuf[THREAD_NAME_BUFLEN]; |
690 | uspace_arg_t *kernel_uarg; |
694 | uspace_arg_t *kernel_uarg; |
691 | int rc; |
695 | int rc; |
692 | 696 | ||
693 | rc = copy_from_uspace(namebuf, uspace_name, THREAD_NAME_BUFLEN); |
697 | rc = copy_from_uspace(namebuf, uspace_name, THREAD_NAME_BUFLEN); |
694 | if (rc != 0) |
698 | if (rc != 0) |
695 | return (unative_t) rc; |
699 | return (unative_t) rc; |
696 | 700 | ||
697 | /* |
701 | /* |
698 | * In case of failure, kernel_uarg will be deallocated in this function. |
702 | * In case of failure, kernel_uarg will be deallocated in this function. |
699 | * In case of success, kernel_uarg will be freed in uinit(). |
703 | * In case of success, kernel_uarg will be freed in uinit(). |
700 | */ |
704 | */ |
701 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
705 | kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0); |
702 | 706 | ||
703 | rc = copy_from_uspace(kernel_uarg, uspace_uarg, sizeof(uspace_arg_t)); |
707 | rc = copy_from_uspace(kernel_uarg, uspace_uarg, sizeof(uspace_arg_t)); |
704 | if (rc != 0) { |
708 | if (rc != 0) { |
705 | free(kernel_uarg); |
709 | free(kernel_uarg); |
706 | return (unative_t) rc; |
710 | return (unative_t) rc; |
707 | } |
711 | } |
708 | 712 | ||
709 | t = thread_create(uinit, kernel_uarg, TASK, |
713 | t = thread_create(uinit, kernel_uarg, TASK, |
710 | THREAD_FLAG_USPACE | THREAD_FLAG_NOATTACH, namebuf, false); |
714 | THREAD_FLAG_USPACE | THREAD_FLAG_NOATTACH, namebuf, false); |
711 | if (t) { |
715 | if (t) { |
712 | if (uspace_thread_id != NULL) { |
716 | if (uspace_thread_id != NULL) { |
713 | int rc; |
717 | int rc; |
714 | 718 | ||
715 | rc = copy_to_uspace(uspace_thread_id, &t->tid, |
719 | rc = copy_to_uspace(uspace_thread_id, &t->tid, |
716 | sizeof(t->tid)); |
720 | sizeof(t->tid)); |
717 | if (rc != 0) { |
721 | if (rc != 0) { |
718 | /* |
722 | /* |
719 | * We have encountered a failure, but the thread |
723 | * We have encountered a failure, but the thread |
720 | * has already been created. We need to undo its |
724 | * has already been created. We need to undo its |
721 | * creation now. |
725 | * creation now. |
722 | */ |
726 | */ |
723 | 727 | ||
724 | /* |
728 | /* |
725 | * The new thread structure is initialized, but |
729 | * The new thread structure is initialized, but |
726 | * is still not visible to the system. |
730 | * is still not visible to the system. |
727 | * We can safely deallocate it. |
731 | * We can safely deallocate it. |
728 | */ |
732 | */ |
729 | slab_free(thread_slab, t); |
733 | slab_free(thread_slab, t); |
730 | free(kernel_uarg); |
734 | free(kernel_uarg); |
731 | 735 | ||
732 | return (unative_t) rc; |
736 | return (unative_t) rc; |
733 | } |
737 | } |
734 | } |
738 | } |
735 | thread_attach(t, TASK); |
739 | thread_attach(t, TASK); |
736 | thread_ready(t); |
740 | thread_ready(t); |
737 | 741 | ||
738 | return 0; |
742 | return 0; |
739 | } else |
743 | } else |
740 | free(kernel_uarg); |
744 | free(kernel_uarg); |
741 | 745 | ||
742 | return (unative_t) ENOMEM; |
746 | return (unative_t) ENOMEM; |
743 | } |
747 | } |
744 | 748 | ||
745 | /** Process syscall to terminate thread. |
749 | /** Process syscall to terminate thread. |
746 | * |
750 | * |
747 | */ |
751 | */ |
748 | unative_t sys_thread_exit(int uspace_status) |
752 | unative_t sys_thread_exit(int uspace_status) |
749 | { |
753 | { |
750 | thread_exit(); |
754 | thread_exit(); |
751 | /* Unreachable */ |
755 | /* Unreachable */ |
752 | return 0; |
756 | return 0; |
753 | } |
757 | } |
754 | 758 | ||
755 | /** Syscall for getting TID. |
759 | /** Syscall for getting TID. |
756 | * |
760 | * |
757 | * @param uspace_thread_id Userspace address of 8-byte buffer where to store |
761 | * @param uspace_thread_id Userspace address of 8-byte buffer where to store |
758 | * current thread ID. |
762 | * current thread ID. |
759 | * |
763 | * |
760 | * @return 0 on success or an error code from @ref errno.h. |
764 | * @return 0 on success or an error code from @ref errno.h. |
761 | */ |
765 | */ |
762 | unative_t sys_thread_get_id(thread_id_t *uspace_thread_id) |
766 | unative_t sys_thread_get_id(thread_id_t *uspace_thread_id) |
763 | { |
767 | { |
764 | /* |
768 | /* |
765 | * No need to acquire lock on THREAD because tid |
769 | * No need to acquire lock on THREAD because tid |
766 | * remains constant for the lifespan of the thread. |
770 | * remains constant for the lifespan of the thread. |
767 | */ |
771 | */ |
768 | return (unative_t) copy_to_uspace(uspace_thread_id, &THREAD->tid, |
772 | return (unative_t) copy_to_uspace(uspace_thread_id, &THREAD->tid, |
769 | sizeof(THREAD->tid)); |
773 | sizeof(THREAD->tid)); |
770 | } |
774 | } |
771 | 775 | ||
772 | /** @} |
776 | /** @} |
773 | */ |
777 | */ |
774 | 778 |