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1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1757 jermar 29
/** @addtogroup genericproc
1702 cejka 30
 * @{
31
 */
32
 
1248 jermar 33
/**
1702 cejka 34
 * @file
1248 jermar 35
 * @brief   Thread management functions.
36
 */
37
 
1 jermar 38
#include <proc/scheduler.h>
39
#include <proc/thread.h>
40
#include <proc/task.h>
1078 jermar 41
#include <proc/uarg.h>
1 jermar 42
#include <mm/frame.h>
43
#include <mm/page.h>
44
#include <arch/asm.h>
2030 decky 45
#include <arch/cycle.h>
1 jermar 46
#include <arch.h>
47
#include <synch/synch.h>
48
#include <synch/spinlock.h>
49
#include <synch/waitq.h>
50
#include <synch/rwlock.h>
51
#include <cpu.h>
52
#include <func.h>
53
#include <context.h>
2502 jermar 54
#include <adt/avl.h>
788 jermar 55
#include <adt/list.h>
1 jermar 56
#include <time/clock.h>
2089 decky 57
#include <time/timeout.h>
7 jermar 58
#include <config.h>
59
#include <arch/interrupt.h>
10 jermar 60
#include <smp/ipi.h>
76 jermar 61
#include <arch/faddr.h>
1104 jermar 62
#include <atomic.h>
195 vana 63
#include <memstr.h>
777 palkovsky 64
#include <print.h>
787 palkovsky 65
#include <mm/slab.h>
66
#include <debug.h>
1066 jermar 67
#include <main/uinit.h>
1288 jermar 68
#include <syscall/copy.h>
69
#include <errno.h>
7 jermar 70
 
1 jermar 71
 
3063 decky 72
#ifndef LOADED_PROG_STACK_PAGES_NO
73
#define LOADED_PROG_STACK_PAGES_NO 1
74
#endif
75
 
76
 
1571 jermar 77
/** Thread states */
78
char *thread_states[] = {
79
    "Invalid",
80
    "Running",
81
    "Sleeping",
82
    "Ready",
83
    "Entering",
84
    "Exiting",
2451 jermar 85
    "Lingering"
1571 jermar 86
};
87
 
2502 jermar 88
/** Lock protecting the threads_tree AVL tree.
2067 jermar 89
 *
90
 * For locking rules, see declaration thereof.
91
 */
1158 jermar 92
SPINLOCK_INITIALIZE(threads_lock);
1 jermar 93
 
2790 jermar 94
/** AVL tree of all threads.
1636 jermar 95
 *
2502 jermar 96
 * When a thread is found in the threads_tree AVL tree, it is guaranteed to
2067 jermar 97
 * exist as long as the threads_lock is held.
1636 jermar 98
 */
2502 jermar 99
avltree_t threads_tree;    
1636 jermar 100
 
623 jermar 101
SPINLOCK_INITIALIZE(tidlock);
2216 decky 102
thread_id_t last_tid = 0;
1 jermar 103
 
787 palkovsky 104
static slab_cache_t *thread_slab;
906 palkovsky 105
#ifdef ARCH_HAS_FPU
106
slab_cache_t *fpu_context_slab;
107
#endif
107 decky 108
 
2067 jermar 109
/** Thread wrapper.
107 decky 110
 *
2067 jermar 111
 * This wrapper is provided to ensure that every thread makes a call to
112
 * thread_exit() when its implementing function returns.
1 jermar 113
 *
413 jermar 114
 * interrupts_disable() is assumed.
107 decky 115
 *
1 jermar 116
 */
452 decky 117
static void cushion(void)
1 jermar 118
{
15 jermar 119
    void (*f)(void *) = THREAD->thread_code;
120
    void *arg = THREAD->thread_arg;
2032 decky 121
    THREAD->last_cycle = get_cycle();
1 jermar 122
 
2039 decky 123
    /* This is where each thread wakes up after its creation */
15 jermar 124
    spinlock_unlock(&THREAD->lock);
413 jermar 125
    interrupts_enable();
1 jermar 126
 
127
    f(arg);
2039 decky 128
 
129
    /* Accumulate accounting to the task */
130
    ipl_t ipl = interrupts_disable();
131
 
132
    spinlock_lock(&THREAD->lock);
2042 decky 133
    if (!THREAD->uncounted) {
134
        thread_update_accounting();
135
        uint64_t cycles = THREAD->cycles;
136
        THREAD->cycles = 0;
137
        spinlock_unlock(&THREAD->lock);
138
 
139
        spinlock_lock(&TASK->lock);
140
        TASK->cycles += cycles;
141
        spinlock_unlock(&TASK->lock);
142
    } else
143
        spinlock_unlock(&THREAD->lock);
2039 decky 144
 
145
    interrupts_restore(ipl);
146
 
1 jermar 147
    thread_exit();
148
    /* not reached */
149
}
150
 
787 palkovsky 151
/** Initialization and allocation for thread_t structure */
152
static int thr_constructor(void *obj, int kmflags)
153
{
1820 decky 154
    thread_t *t = (thread_t *) obj;
107 decky 155
 
787 palkovsky 156
    spinlock_initialize(&t->lock, "thread_t_lock");
157
    link_initialize(&t->rq_link);
158
    link_initialize(&t->wq_link);
159
    link_initialize(&t->th_link);
1854 jermar 160
 
161
    /* call the architecture-specific part of the constructor */
162
    thr_constructor_arch(t);
787 palkovsky 163
 
906 palkovsky 164
#ifdef ARCH_HAS_FPU
2440 jermar 165
#ifdef CONFIG_FPU_LAZY
906 palkovsky 166
    t->saved_fpu_context = NULL;
2440 jermar 167
#else
168
    t->saved_fpu_context = slab_alloc(fpu_context_slab, kmflags);
906 palkovsky 169
    if (!t->saved_fpu_context)
170
        return -1;
2440 jermar 171
#endif
906 palkovsky 172
#endif  
173
 
2118 decky 174
    t->kstack = (uint8_t *) frame_alloc(STACK_FRAMES, FRAME_KA | kmflags);
2440 jermar 175
    if (!t->kstack) {
906 palkovsky 176
#ifdef ARCH_HAS_FPU
177
        if (t->saved_fpu_context)
2440 jermar 178
            slab_free(fpu_context_slab, t->saved_fpu_context);
906 palkovsky 179
#endif
842 palkovsky 180
        return -1;
906 palkovsky 181
    }
787 palkovsky 182
 
183
    return 0;
184
}
185
 
186
/** Destruction of thread_t object */
187
static int thr_destructor(void *obj)
188
{
1820 decky 189
    thread_t *t = (thread_t *) obj;
787 palkovsky 190
 
1854 jermar 191
    /* call the architecture-specific part of the destructor */
192
    thr_destructor_arch(t);
193
 
1760 palkovsky 194
    frame_free(KA2PA(t->kstack));
906 palkovsky 195
#ifdef ARCH_HAS_FPU
196
    if (t->saved_fpu_context)
2440 jermar 197
        slab_free(fpu_context_slab, t->saved_fpu_context);
906 palkovsky 198
#endif
787 palkovsky 199
    return 1; /* One page freed */
200
}
201
 
107 decky 202
/** Initialize threads
203
 *
204
 * Initialize kernel threads support.
205
 *
206
 */
1 jermar 207
void thread_init(void)
208
{
15 jermar 209
    THREAD = NULL;
625 palkovsky 210
    atomic_set(&nrdy,0);
2067 jermar 211
    thread_slab = slab_cache_create("thread_slab", sizeof(thread_t), 0,
2087 jermar 212
        thr_constructor, thr_destructor, 0);
2067 jermar 213
 
906 palkovsky 214
#ifdef ARCH_HAS_FPU
2067 jermar 215
    fpu_context_slab = slab_cache_create("fpu_slab", sizeof(fpu_context_t),
2087 jermar 216
        FPU_CONTEXT_ALIGN, NULL, NULL, 0);
906 palkovsky 217
#endif
1158 jermar 218
 
2502 jermar 219
    avltree_create(&threads_tree);
1 jermar 220
}
221
 
107 decky 222
/** Make thread ready
223
 *
224
 * Switch thread t to the ready state.
225
 *
226
 * @param t Thread to make ready.
227
 *
228
 */
1 jermar 229
void thread_ready(thread_t *t)
230
{
231
    cpu_t *cpu;
232
    runq_t *r;
413 jermar 233
    ipl_t ipl;
625 palkovsky 234
    int i, avg;
1 jermar 235
 
413 jermar 236
    ipl = interrupts_disable();
1 jermar 237
 
238
    spinlock_lock(&t->lock);
239
 
2440 jermar 240
    ASSERT(!(t->state == Ready));
1086 palkovsky 241
 
2067 jermar 242
    i = (t->priority < RQ_COUNT - 1) ? ++t->priority : t->priority;
1 jermar 243
 
16 jermar 244
    cpu = CPU;
1854 jermar 245
    if (t->flags & THREAD_FLAG_WIRED) {
2268 jermar 246
        ASSERT(t->cpu != NULL);
1 jermar 247
        cpu = t->cpu;
248
    }
1083 palkovsky 249
    t->state = Ready;
1 jermar 250
    spinlock_unlock(&t->lock);
251
 
107 decky 252
    /*
1 jermar 253
     * Append t to respective ready queue on respective processor.
254
     */
255
    r = &cpu->rq[i];
256
    spinlock_lock(&r->lock);
257
    list_append(&t->rq_link, &r->rq_head);
258
    r->n++;
259
    spinlock_unlock(&r->lock);
260
 
475 jermar 261
    atomic_inc(&nrdy);
625 palkovsky 262
    avg = atomic_get(&nrdy) / config.cpu_active;
783 palkovsky 263
    atomic_inc(&cpu->nrdy);
1 jermar 264
 
413 jermar 265
    interrupts_restore(ipl);
1 jermar 266
}
267
 
107 decky 268
/** Create new thread
269
 *
270
 * Create a new thread.
271
 *
2907 jermar 272
 * @param func      Thread's implementing function.
273
 * @param arg       Thread's implementing function argument.
274
 * @param task      Task to which the thread belongs. The caller must
275
 *          guarantee that the task won't cease to exist during the
276
 *          call. The task's lock may not be held.
277
 * @param flags     Thread flags.
278
 * @param name      Symbolic name.
279
 * @param uncounted Thread's accounting doesn't affect accumulated task
280
 *          accounting.
107 decky 281
 *
2907 jermar 282
 * @return      New thread's structure on success, NULL on failure.
107 decky 283
 *
284
 */
2067 jermar 285
thread_t *thread_create(void (* func)(void *), void *arg, task_t *task,
2436 jermar 286
    int flags, char *name, bool uncounted)
1 jermar 287
{
288
    thread_t *t;
822 palkovsky 289
    ipl_t ipl;
290
 
787 palkovsky 291
    t = (thread_t *) slab_alloc(thread_slab, 0);
842 palkovsky 292
    if (!t)
293
        return NULL;
1 jermar 294
 
822 palkovsky 295
    /* Not needed, but good for debugging */
3104 svoboda 296
    memsetb(t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES, 0);
822 palkovsky 297
 
298
    ipl = interrupts_disable();
299
    spinlock_lock(&tidlock);
300
    t->tid = ++last_tid;
301
    spinlock_unlock(&tidlock);
302
    interrupts_restore(ipl);
303
 
304
    context_save(&t->saved_context);
2067 jermar 305
    context_set(&t->saved_context, FADDR(cushion), (uintptr_t) t->kstack,
2087 jermar 306
        THREAD_STACK_SIZE);
822 palkovsky 307
 
308
    the_initialize((the_t *) t->kstack);
309
 
310
    ipl = interrupts_disable();
311
    t->saved_context.ipl = interrupts_read();
312
    interrupts_restore(ipl);
313
 
1066 jermar 314
    memcpy(t->name, name, THREAD_NAME_BUFLEN);
315
 
822 palkovsky 316
    t->thread_code = func;
317
    t->thread_arg = arg;
318
    t->ticks = -1;
2030 decky 319
    t->cycles = 0;
2042 decky 320
    t->uncounted = uncounted;
822 palkovsky 321
    t->priority = -1;       /* start in rq[0] */
322
    t->cpu = NULL;
1854 jermar 323
    t->flags = flags;
822 palkovsky 324
    t->state = Entering;
325
    t->call_me = NULL;
326
    t->call_me_with = NULL;
327
 
328
    timeout_initialize(&t->sleep_timeout);
1502 jermar 329
    t->sleep_interruptible = false;
822 palkovsky 330
    t->sleep_queue = NULL;
331
    t->timeout_pending = 0;
1288 jermar 332
 
333
    t->in_copy_from_uspace = false;
334
    t->in_copy_to_uspace = false;
1579 jermar 335
 
336
    t->interrupted = false;
1571 jermar 337
    t->detached = false;
338
    waitq_initialize(&t->join_wq);
339
 
822 palkovsky 340
    t->rwlock_holder_type = RWLOCK_NONE;
210 decky 341
 
822 palkovsky 342
    t->task = task;
343
 
860 decky 344
    t->fpu_context_exists = 0;
345
    t->fpu_context_engaged = 0;
1854 jermar 346
 
2502 jermar 347
    avltree_node_initialize(&t->threads_tree_node);
348
    t->threads_tree_node.key = (uintptr_t) t;
349
 
2067 jermar 350
    /* might depend on previous initialization */
351
    thread_create_arch(t); 
2440 jermar 352
 
353
    if (!(flags & THREAD_FLAG_NOATTACH))
354
        thread_attach(t, task);
355
 
356
    return t;
357
}
358
 
359
/** Destroy thread memory structure
360
 *
361
 * Detach thread from all queues, cpus etc. and destroy it.
362
 *
363
 * Assume thread->lock is held!!
364
 */
365
void thread_destroy(thread_t *t)
366
{
2451 jermar 367
    ASSERT(t->state == Exiting || t->state == Lingering);
2440 jermar 368
    ASSERT(t->task);
369
    ASSERT(t->cpu);
370
 
371
    spinlock_lock(&t->cpu->lock);
372
    if (t->cpu->fpu_owner == t)
373
        t->cpu->fpu_owner = NULL;
374
    spinlock_unlock(&t->cpu->lock);
375
 
376
    spinlock_unlock(&t->lock);
377
 
378
    spinlock_lock(&threads_lock);
2502 jermar 379
    avltree_delete(&threads_tree, &t->threads_tree_node);
2440 jermar 380
    spinlock_unlock(&threads_lock);
381
 
382
    /*
383
     * Detach from the containing task.
384
     */
385
    spinlock_lock(&t->task->lock);
386
    list_remove(&t->th_link);
387
    spinlock_unlock(&t->task->lock);   
2446 jermar 388
 
389
    /*
390
     * t is guaranteed to be the very last thread of its task.
391
     * It is safe to destroy the task.
392
     */
393
    if (atomic_predec(&t->task->refcount) == 0)
2440 jermar 394
        task_destroy(t->task);
395
 
396
    slab_free(thread_slab, t);
397
}
398
 
399
/** Make the thread visible to the system.
400
 *
401
 * Attach the thread structure to the current task and make it visible in the
2502 jermar 402
 * threads_tree.
2440 jermar 403
 *
404
 * @param t Thread to be attached to the task.
405
 * @param task  Task to which the thread is to be attached.
406
 */
407
void thread_attach(thread_t *t, task_t *task)
408
{
409
    ipl_t ipl;
410
 
411
    /*
412
     * Attach to the current task.
413
     */
2446 jermar 414
    ipl = interrupts_disable();
2440 jermar 415
    spinlock_lock(&task->lock);
2446 jermar 416
    atomic_inc(&task->refcount);
417
    atomic_inc(&task->lifecount);
1579 jermar 418
    list_append(&t->th_link, &task->th_head);
419
    spinlock_unlock(&task->lock);
420
 
421
    /*
822 palkovsky 422
     * Register this thread in the system-wide list.
423
     */
424
    spinlock_lock(&threads_lock);
2502 jermar 425
    avltree_insert(&threads_tree, &t->threads_tree_node);
822 palkovsky 426
    spinlock_unlock(&threads_lock);
427
 
428
    interrupts_restore(ipl);
1 jermar 429
}
430
 
1687 jermar 431
/** Terminate thread.
107 decky 432
 *
2067 jermar 433
 * End current thread execution and switch it to the exiting state. All pending
434
 * timeouts are executed.
107 decky 435
 */
1 jermar 436
void thread_exit(void)
437
{
413 jermar 438
    ipl_t ipl;
1 jermar 439
 
2446 jermar 440
    if (atomic_predec(&TASK->lifecount) == 0) {
441
        /*
442
         * We are the last thread in the task that still has not exited.
443
         * With the exception of the moment the task was created, new
444
         * threads can only be created by threads of the same task.
445
         * We are safe to perform cleanup.
446
         */
447
        if (THREAD->flags & THREAD_FLAG_USPACE) {
448
            ipc_cleanup();
3063 decky 449
            futex_cleanup();
450
            LOG("Cleanup of task %" PRIu64" completed.", TASK->taskid);
2446 jermar 451
        }
452
    }
453
 
1 jermar 454
restart:
413 jermar 455
    ipl = interrupts_disable();
15 jermar 456
    spinlock_lock(&THREAD->lock);
2067 jermar 457
    if (THREAD->timeout_pending) {
458
        /* busy waiting for timeouts in progress */
15 jermar 459
        spinlock_unlock(&THREAD->lock);
413 jermar 460
        interrupts_restore(ipl);
1 jermar 461
        goto restart;
462
    }
2446 jermar 463
 
15 jermar 464
    THREAD->state = Exiting;
465
    spinlock_unlock(&THREAD->lock);
1 jermar 466
    scheduler();
1595 palkovsky 467
 
468
    /* Not reached */
469
    while (1)
470
        ;
1 jermar 471
}
472
 
107 decky 473
 
474
/** Thread sleep
475
 *
476
 * Suspend execution of the current thread.
477
 *
478
 * @param sec Number of seconds to sleep.
479
 *
480
 */
1780 jermar 481
void thread_sleep(uint32_t sec)
1 jermar 482
{
2067 jermar 483
    thread_usleep(sec * 1000000);
1 jermar 484
}
107 decky 485
 
1571 jermar 486
/** Wait for another thread to exit.
487
 *
488
 * @param t Thread to join on exit.
489
 * @param usec Timeout in microseconds.
490
 * @param flags Mode of operation.
491
 *
492
 * @return An error code from errno.h or an error code from synch.h.
493
 */
1780 jermar 494
int thread_join_timeout(thread_t *t, uint32_t usec, int flags)
1571 jermar 495
{
496
    ipl_t ipl;
497
    int rc;
498
 
499
    if (t == THREAD)
500
        return EINVAL;
501
 
502
    /*
503
     * Since thread join can only be called once on an undetached thread,
504
     * the thread pointer is guaranteed to be still valid.
505
     */
506
 
507
    ipl = interrupts_disable();
508
    spinlock_lock(&t->lock);
509
    ASSERT(!t->detached);
510
    spinlock_unlock(&t->lock);
1687 jermar 511
    interrupts_restore(ipl);
1571 jermar 512
 
1687 jermar 513
    rc = waitq_sleep_timeout(&t->join_wq, usec, flags);
1571 jermar 514
 
515
    return rc; 
516
}
517
 
518
/** Detach thread.
519
 *
2451 jermar 520
 * Mark the thread as detached, if the thread is already in the Lingering
521
 * state, deallocate its resources.
1571 jermar 522
 *
523
 * @param t Thread to be detached.
524
 */
525
void thread_detach(thread_t *t)
526
{
527
    ipl_t ipl;
528
 
529
    /*
2183 jermar 530
     * Since the thread is expected not to be already detached,
1571 jermar 531
     * pointer to it must be still valid.
532
     */
533
    ipl = interrupts_disable();
534
    spinlock_lock(&t->lock);
535
    ASSERT(!t->detached);
2451 jermar 536
    if (t->state == Lingering) {
1571 jermar 537
        thread_destroy(t);  /* unlocks &t->lock */
538
        interrupts_restore(ipl);
539
        return;
540
    } else {
541
        t->detached = true;
542
    }
543
    spinlock_unlock(&t->lock);
544
    interrupts_restore(ipl);
545
}
546
 
107 decky 547
/** Thread usleep
548
 *
549
 * Suspend execution of the current thread.
550
 *
551
 * @param usec Number of microseconds to sleep.
552
 *
553
 */
1780 jermar 554
void thread_usleep(uint32_t usec)
1 jermar 555
{
556
    waitq_t wq;
557
 
558
    waitq_initialize(&wq);
559
 
1502 jermar 560
    (void) waitq_sleep_timeout(&wq, usec, SYNCH_FLAGS_NON_BLOCKING);
1 jermar 561
}
562
 
107 decky 563
/** Register thread out-of-context invocation
564
 *
565
 * Register a function and its argument to be executed
566
 * on next context switch to the current thread.
567
 *
568
 * @param call_me      Out-of-context function.
569
 * @param call_me_with Out-of-context function argument.
570
 *
571
 */
1 jermar 572
void thread_register_call_me(void (* call_me)(void *), void *call_me_with)
573
{
413 jermar 574
    ipl_t ipl;
1 jermar 575
 
413 jermar 576
    ipl = interrupts_disable();
15 jermar 577
    spinlock_lock(&THREAD->lock);
578
    THREAD->call_me = call_me;
579
    THREAD->call_me_with = call_me_with;
580
    spinlock_unlock(&THREAD->lock);
413 jermar 581
    interrupts_restore(ipl);
1 jermar 582
}
777 palkovsky 583
 
2504 jermar 584
static bool thread_walker(avltree_node_t *node, void *arg)
2502 jermar 585
{
3063 decky 586
    thread_t *t = avltree_get_instance(node, thread_t, threads_tree_node);
587
 
2502 jermar 588
    uint64_t cycles;
589
    char suffix;
590
    order(t->cycles, &cycles, &suffix);
3063 decky 591
 
592
#ifdef __32_BITS__
593
    printf("%-6" PRIu64" %-10s %10p %-8s %10p %-3" PRIu32 " %10p %10p %9" PRIu64 "%c ",
594
        t->tid, t->name, t, thread_states[t->state], t->task,
595
        t->task->context, t->thread_code, t->kstack, cycles, suffix);
596
#endif
597
 
598
#ifdef __64_BITS__
599
    printf("%-6" PRIu64" %-10s %18p %-8s %18p %-3" PRIu32 " %18p %18p %9" PRIu64 "%c ",
600
        t->tid, t->name, t, thread_states[t->state], t->task,
601
        t->task->context, t->thread_code, t->kstack, cycles, suffix);
602
#endif
2502 jermar 603
 
604
    if (t->cpu)
3063 decky 605
        printf("%-4u", t->cpu->id);
2502 jermar 606
    else
607
        printf("none");
608
 
2712 decky 609
    if (t->state == Sleeping) {
3063 decky 610
#ifdef __32_BITS__
611
        printf(" %10p", t->sleep_queue);
612
#endif
613
 
614
#ifdef __64_BITS__
615
        printf(" %18p", t->sleep_queue);
616
#endif
2712 decky 617
    }
2502 jermar 618
 
619
    printf("\n");
2504 jermar 620
 
621
    return true;
2502 jermar 622
}
623
 
777 palkovsky 624
/** Print list of threads debug info */
625
void thread_print_list(void)
626
{
627
    ipl_t ipl;
628
 
629
    /* Messing with thread structures, avoid deadlock */
630
    ipl = interrupts_disable();
631
    spinlock_lock(&threads_lock);
632
 
3063 decky 633
#ifdef __32_BITS__  
634
    printf("tid    name       address    state    task       "
635
        "ctx code       stack      cycles     cpu  "
636
        "waitqueue\n");
637
    printf("------ ---------- ---------- -------- ---------- "
638
        "--- ---------- ---------- ---------- ---- "
639
        "----------\n");
640
#endif
641
 
642
#ifdef __64_BITS__
643
    printf("tid    name       address            state    task               "
644
        "ctx code               stack              cycles     cpu  "
645
        "waitqueue\n");
646
    printf("------ ---------- ------------------ -------- ------------------ "
647
        "--- ------------------ ------------------ ---------- ---- "
648
        "------------------\n");
649
#endif
650
 
2504 jermar 651
    avltree_walk(&threads_tree, thread_walker, NULL);
1158 jermar 652
 
777 palkovsky 653
    spinlock_unlock(&threads_lock);
1060 palkovsky 654
    interrupts_restore(ipl);
777 palkovsky 655
}
1066 jermar 656
 
1158 jermar 657
/** Check whether thread exists.
658
 *
659
 * Note that threads_lock must be already held and
660
 * interrupts must be already disabled.
661
 *
662
 * @param t Pointer to thread.
663
 *
664
 * @return True if thread t is known to the system, false otherwise.
665
 */
666
bool thread_exists(thread_t *t)
667
{
2502 jermar 668
    avltree_node_t *node;
669
 
670
    node = avltree_search(&threads_tree, (avltree_key_t) ((uintptr_t) t));
1158 jermar 671
 
2502 jermar 672
    return node != NULL;
1158 jermar 673
}
674
 
2030 decky 675
 
3063 decky 676
/** Create new user task with 1 thread from image
677
 *
678
 * @param program_addr Address of program executable image.
679
 * @param name Program name.
680
 *
681
 * @return Initialized main thread of the task or NULL on error.
682
 */
683
thread_t *thread_create_program(void *program_addr, char *name)
684
{
685
    as_t *as;
686
    as_area_t *area;
687
    unsigned int rc;
688
    task_t *task;
689
    uspace_arg_t *kernel_uarg;
690
 
691
    kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);
692
    if (kernel_uarg == NULL)
693
        return NULL;
694
 
695
    kernel_uarg->uspace_entry =
696
        (void *) ((elf_header_t *) program_addr)->e_entry;
697
    kernel_uarg->uspace_stack = (void *) USTACK_ADDRESS;
698
    kernel_uarg->uspace_thread_function = NULL;
699
    kernel_uarg->uspace_thread_arg = NULL;
700
    kernel_uarg->uspace_uarg = NULL;
701
 
702
    as = as_create(0);
703
    if (as == NULL) {
704
        free(kernel_uarg);
705
        return NULL;
706
    }
707
 
708
    rc = elf_load((elf_header_t *) program_addr, as);
709
    if (rc != EE_OK) {
710
        free(kernel_uarg);
711
        as_destroy(as);
712
        return NULL;
713
    }
714
 
715
    /*
716
     * Create the data as_area.
717
     */
718
    area = as_area_create(as,
719
        AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE,
720
        LOADED_PROG_STACK_PAGES_NO * PAGE_SIZE, USTACK_ADDRESS,
721
        AS_AREA_ATTR_NONE, &anon_backend, NULL);
722
    if (area == NULL) {
723
        free(kernel_uarg);
724
        as_destroy(as);
725
        return NULL;
726
    }
727
 
728
    task = task_create(as, name);
729
    if (task == NULL) {
730
        free(kernel_uarg);
731
        as_destroy(as);
732
        return NULL;
733
    }
734
 
735
    /*
736
     * Create the main thread.
737
     */
738
    return thread_create(uinit, kernel_uarg, task, THREAD_FLAG_USPACE,
739
        "uinit", false);
740
}
741
 
742
 
2030 decky 743
/** Update accounting of current thread.
744
 *
745
 * Note that thread_lock on THREAD must be already held and
746
 * interrupts must be already disabled.
747
 *
748
 */
749
void thread_update_accounting(void)
750
{
751
    uint64_t time = get_cycle();
752
    THREAD->cycles += time - THREAD->last_cycle;
753
    THREAD->last_cycle = time;
754
}
755
 
1066 jermar 756
/** Process syscall to create new thread.
757
 *
758
 */
2436 jermar 759
unative_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name,
760
    thread_id_t *uspace_thread_id)
1066 jermar 761
{
1210 vana 762
    thread_t *t;
763
    char namebuf[THREAD_NAME_BUFLEN];
1103 jermar 764
    uspace_arg_t *kernel_uarg;
1288 jermar 765
    int rc;
1066 jermar 766
 
1288 jermar 767
    rc = copy_from_uspace(namebuf, uspace_name, THREAD_NAME_BUFLEN);
768
    if (rc != 0)
1780 jermar 769
        return (unative_t) rc;
1066 jermar 770
 
2470 jermar 771
    /*
772
     * In case of failure, kernel_uarg will be deallocated in this function.
773
     * In case of success, kernel_uarg will be freed in uinit().
774
     */
775
    kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);
776
 
1288 jermar 777
    rc = copy_from_uspace(kernel_uarg, uspace_uarg, sizeof(uspace_arg_t));
778
    if (rc != 0) {
779
        free(kernel_uarg);
1780 jermar 780
        return (unative_t) rc;
1288 jermar 781
    }
1078 jermar 782
 
2440 jermar 783
    t = thread_create(uinit, kernel_uarg, TASK,
784
        THREAD_FLAG_USPACE | THREAD_FLAG_NOATTACH, namebuf, false);
2087 jermar 785
    if (t) {
2440 jermar 786
        if (uspace_thread_id != NULL) {
787
            int rc;
788
 
789
            rc = copy_to_uspace(uspace_thread_id, &t->tid,
790
                sizeof(t->tid));
791
            if (rc != 0) {
792
                /*
793
                 * We have encountered a failure, but the thread
794
                 * has already been created. We need to undo its
795
                 * creation now.
796
                 */
797
 
798
                /*
2446 jermar 799
                 * The new thread structure is initialized, but
800
                 * is still not visible to the system.
2440 jermar 801
                 * We can safely deallocate it.
802
                 */
803
                slab_free(thread_slab, t);
804
                free(kernel_uarg);
805
 
806
                return (unative_t) rc;
807
             }
808
        }
809
        thread_attach(t, TASK);
1210 vana 810
        thread_ready(t);
2440 jermar 811
 
812
        return 0;
2216 decky 813
    } else
1078 jermar 814
        free(kernel_uarg);
1066 jermar 815
 
1780 jermar 816
    return (unative_t) ENOMEM;
1066 jermar 817
}
818
 
819
/** Process syscall to terminate thread.
820
 *
821
 */
1780 jermar 822
unative_t sys_thread_exit(int uspace_status)
1066 jermar 823
{
1210 vana 824
    thread_exit();
825
    /* Unreachable */
826
    return 0;
1066 jermar 827
}
1702 cejka 828
 
2187 decky 829
/** Syscall for getting TID.
830
 *
2216 decky 831
 * @param uspace_thread_id Userspace address of 8-byte buffer where to store
832
 * current thread ID.
833
 *
834
 * @return 0 on success or an error code from @ref errno.h.
2187 decky 835
 */
2216 decky 836
unative_t sys_thread_get_id(thread_id_t *uspace_thread_id)
2187 decky 837
{
838
    /*
839
     * No need to acquire lock on THREAD because tid
840
     * remains constant for the lifespan of the thread.
841
     */
2216 decky 842
    return (unative_t) copy_to_uspace(uspace_thread_id, &THREAD->tid,
843
        sizeof(THREAD->tid));
2187 decky 844
}
845
 
1757 jermar 846
/** @}
1702 cejka 847
 */