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2894 svoboda 1
/*
2
 * Copyright (c) 2008 Jiri Svoboda
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
 
2801 svoboda 29
/** @addtogroup generic
30
 * @{
31
 */
32
 
33
/**
34
 * @file
3471 svoboda 35
 * @brief   Udebug hooks and data structure management.
3031 svoboda 36
 *
3471 svoboda 37
 * Udebug is an interface that makes userspace debuggers possible.
2801 svoboda 38
 */
39
 
40
#include <synch/waitq.h>
3471 svoboda 41
#include <debug.h>
2813 svoboda 42
#include <udebug/udebug.h>
2870 svoboda 43
#include <errno.h>
4377 svoboda 44
#include <print.h>
2801 svoboda 45
#include <arch.h>
46
 
3026 svoboda 47
 
3471 svoboda 48
/** Initialize udebug part of task structure.
49
 *
50
 * Called as part of task structure initialization.
51
 * @param ut    Pointer to the structure to initialize.
52
 */
3014 svoboda 53
void udebug_task_init(udebug_task_t *ut)
54
{
3426 svoboda 55
    mutex_initialize(&ut->lock, MUTEX_PASSIVE);
3014 svoboda 56
    ut->dt_state = UDEBUG_TS_INACTIVE;
57
    ut->begin_call = NULL;
58
    ut->not_stoppable_count = 0;
59
    ut->evmask = 0;
60
}
61
 
3471 svoboda 62
/** Initialize udebug part of thread structure.
63
 *
64
 * Called as part of thread structure initialization.
65
 * @param ut    Pointer to the structure to initialize.
66
 */
3018 svoboda 67
void udebug_thread_initialize(udebug_thread_t *ut)
68
{
3426 svoboda 69
    mutex_initialize(&ut->lock, MUTEX_PASSIVE);
3018 svoboda 70
    waitq_initialize(&ut->go_wq);
3026 svoboda 71
 
3018 svoboda 72
    ut->go_call = NULL;
73
    ut->uspace_state = NULL;
3606 svoboda 74
    ut->go = false;
3018 svoboda 75
    ut->stoppable = true;
3684 svoboda 76
    ut->active = false;
3018 svoboda 77
    ut->cur_event = 0; /* none */
78
}
79
 
3471 svoboda 80
/** Wait for a GO message.
81
 *
82
 * When a debugging event occurs in a thread or the thread is stopped,
83
 * this function is called to block the thread until a GO message
84
 * is received.
85
 *
86
 * @param wq    The wait queue used by the thread to wait for GO messages.
87
 */
2917 svoboda 88
static void udebug_wait_for_go(waitq_t *wq)
89
{
90
    int rc;
91
    ipl_t ipl;
92
 
93
    ipl = waitq_sleep_prepare(wq);
94
 
95
    wq->missed_wakeups = 0; /* Enforce blocking. */
96
    rc = waitq_sleep_timeout_unsafe(wq, SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE);
97
 
98
    waitq_sleep_finish(wq, rc, ipl);
99
}
100
 
3471 svoboda 101
/** Start of stoppable section.
102
 *
103
 * A stoppable section is a section of code where if the thread can be stoped. In other words,
104
 * if a STOP operation is issued, the thread is guaranteed not to execute
105
 * any userspace instructions until the thread is resumed.
106
 *
107
 * Having stoppable sections is better than having stopping points, since
108
 * a thread can be stopped even when it is blocked indefinitely in a system
109
 * call (whereas it would not reach any stopping point).
110
 */
2804 svoboda 111
void udebug_stoppable_begin(void)
2801 svoboda 112
{
2804 svoboda 113
    int nsc;
2898 svoboda 114
    call_t *db_call, *go_call;
2804 svoboda 115
 
2902 svoboda 116
    ASSERT(THREAD);
117
    ASSERT(TASK);
118
 
3016 svoboda 119
    mutex_lock(&TASK->udebug.lock);
2804 svoboda 120
 
3014 svoboda 121
    nsc = --TASK->udebug.not_stoppable_count;
2804 svoboda 122
 
3032 svoboda 123
    /* Lock order OK, THREAD->udebug.lock is after TASK->udebug.lock */
124
    mutex_lock(&THREAD->udebug.lock);
125
    ASSERT(THREAD->udebug.stoppable == false);
126
    THREAD->udebug.stoppable = true;
2804 svoboda 127
 
3014 svoboda 128
    if (TASK->udebug.dt_state == UDEBUG_TS_BEGINNING && nsc == 0) {
2898 svoboda 129
        /*
130
         * This was the last non-stoppable thread. Reply to
131
         * DEBUG_BEGIN call.
132
         */
133
 
3014 svoboda 134
        db_call = TASK->udebug.begin_call;
2902 svoboda 135
        ASSERT(db_call);
136
 
3014 svoboda 137
        TASK->udebug.dt_state = UDEBUG_TS_ACTIVE;
138
        TASK->udebug.begin_call = NULL;
2804 svoboda 139
 
140
        IPC_SET_RETVAL(db_call->data, 0);
141
        ipc_answer(&TASK->answerbox, db_call);     
2898 svoboda 142
 
3014 svoboda 143
    } else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) {
2898 svoboda 144
        /*
145
         * Active debugging session
146
         */
147
 
3684 svoboda 148
        if (THREAD->udebug.active == true &&
3606 svoboda 149
            THREAD->udebug.go == false) {
2898 svoboda 150
            /*
151
             * Thread was requested to stop - answer go call
152
             */
153
 
154
            /* Make sure nobody takes this call away from us */
3018 svoboda 155
            go_call = THREAD->udebug.go_call;
156
            THREAD->udebug.go_call = NULL;
2902 svoboda 157
            ASSERT(go_call);
2898 svoboda 158
 
159
            IPC_SET_RETVAL(go_call->data, 0);
160
            IPC_SET_ARG1(go_call->data, UDEBUG_EVENT_STOP);
161
 
3018 svoboda 162
            THREAD->udebug.cur_event = UDEBUG_EVENT_STOP;
2898 svoboda 163
 
164
                ipc_answer(&TASK->answerbox, go_call);
165
        }
3032 svoboda 166
    }
2898 svoboda 167
 
3032 svoboda 168
    mutex_unlock(&THREAD->udebug.lock);
169
        mutex_unlock(&TASK->udebug.lock);
2804 svoboda 170
}
171
 
3471 svoboda 172
/** End of a stoppable section.
173
 *
174
 * This is the point where the thread will block if it is stopped.
175
 * (As, by definition, a stopped thread must not leave its stoppable section).
176
 */
2804 svoboda 177
void udebug_stoppable_end(void)
178
{
179
restart:
3016 svoboda 180
    mutex_lock(&TASK->udebug.lock);
3026 svoboda 181
    mutex_lock(&THREAD->udebug.lock);
2898 svoboda 182
 
3684 svoboda 183
    if (THREAD->udebug.active && THREAD->udebug.go == false) {
3014 svoboda 184
        TASK->udebug.begin_call = NULL;
3026 svoboda 185
        mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 186
        mutex_unlock(&TASK->udebug.lock);
2823 svoboda 187
 
3018 svoboda 188
        udebug_wait_for_go(&THREAD->udebug.go_wq);
2917 svoboda 189
 
2804 svoboda 190
        goto restart;
3606 svoboda 191
        /* Must try again - have to lose stoppability atomically. */
2804 svoboda 192
    } else {
3014 svoboda 193
        ++TASK->udebug.not_stoppable_count;
3026 svoboda 194
        ASSERT(THREAD->udebug.stoppable == true);
3018 svoboda 195
        THREAD->udebug.stoppable = false;
2898 svoboda 196
 
3026 svoboda 197
        mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 198
        mutex_unlock(&TASK->udebug.lock);
2801 svoboda 199
    }
200
}
201
 
3015 svoboda 202
/** Upon being scheduled to run, check if the current thread should stop.
203
 *
3611 svoboda 204
 * This function is called from clock().
3015 svoboda 205
 */
206
void udebug_before_thread_runs(void)
207
{
3611 svoboda 208
    /* Check if we are supposed to stop. */
3015 svoboda 209
    udebug_stoppable_begin();
210
    udebug_stoppable_end();
211
}
212
 
3471 svoboda 213
/** Syscall event hook.
214
 *
215
 * Must be called before and after servicing a system call. This generates
216
 * a SYSCALL_B or SYSCALL_E event, depending on the value of @a end_variant.
217
 */
2805 svoboda 218
void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3,
2901 svoboda 219
    unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc,
220
    bool end_variant)
2801 svoboda 221
{
2805 svoboda 222
    call_t *call;
2901 svoboda 223
    udebug_event_t etype;
2805 svoboda 224
 
2901 svoboda 225
    etype = end_variant ? UDEBUG_EVENT_SYSCALL_E : UDEBUG_EVENT_SYSCALL_B;
226
 
3016 svoboda 227
    mutex_lock(&TASK->udebug.lock);
3026 svoboda 228
    mutex_lock(&THREAD->udebug.lock);
3016 svoboda 229
 
3606 svoboda 230
    /* Must only generate events when in debugging session and is go. */
3684 svoboda 231
    if (THREAD->udebug.active != true || THREAD->udebug.go == false ||
3014 svoboda 232
        (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) {
3026 svoboda 233
        mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 234
        mutex_unlock(&TASK->udebug.lock);
2867 svoboda 235
        return;
236
    }
2804 svoboda 237
 
4692 svoboda 238
    /* Fill in the GO response. */
3018 svoboda 239
    call = THREAD->udebug.go_call;
240
    THREAD->udebug.go_call = NULL;
3016 svoboda 241
 
2867 svoboda 242
    IPC_SET_RETVAL(call->data, 0);
2901 svoboda 243
    IPC_SET_ARG1(call->data, etype);
2867 svoboda 244
    IPC_SET_ARG2(call->data, id);
245
    IPC_SET_ARG3(call->data, rc);
2805 svoboda 246
 
3018 svoboda 247
    THREAD->udebug.syscall_args[0] = a1;
248
    THREAD->udebug.syscall_args[1] = a2;
249
    THREAD->udebug.syscall_args[2] = a3;
250
    THREAD->udebug.syscall_args[3] = a4;
251
    THREAD->udebug.syscall_args[4] = a5;
252
    THREAD->udebug.syscall_args[5] = a6;
2866 svoboda 253
 
2867 svoboda 254
    /*
3606 svoboda 255
     * Make sure udebug.go is false when going to sleep
2867 svoboda 256
     * in case we get woken up by DEBUG_END. (At which
257
     * point it must be back to the initial true value).
258
     */
3606 svoboda 259
    THREAD->udebug.go = false;
3018 svoboda 260
    THREAD->udebug.cur_event = etype;
2867 svoboda 261
 
3016 svoboda 262
    ipc_answer(&TASK->answerbox, call);
263
 
3032 svoboda 264
    mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 265
    mutex_unlock(&TASK->udebug.lock);
266
 
3018 svoboda 267
    udebug_wait_for_go(&THREAD->udebug.go_wq);
2867 svoboda 268
}
269
 
3623 svoboda 270
/** Thread-creation event hook combined with attaching the thread.
3471 svoboda 271
 *
272
 * Must be called when a new userspace thread is created in the debugged
3623 svoboda 273
 * task. Generates a THREAD_B event. Also attaches the thread @a t
274
 * to the task @a ta.
3471 svoboda 275
 *
3623 svoboda 276
 * This is necessary to avoid a race condition where the BEGIN and THREAD_READ
277
 * requests would be handled inbetween attaching the thread and checking it
278
 * for being in a debugging session to send the THREAD_B event. We could then
279
 * either miss threads or get some threads both in the thread list
280
 * and get a THREAD_B event for them.
281
 *
3471 svoboda 282
 * @param t Structure of the thread being created. Not locked, as the
283
 *      thread is not executing yet.
3623 svoboda 284
 * @param ta    Task to which the thread should be attached.
3471 svoboda 285
 */
3623 svoboda 286
void udebug_thread_b_event_attach(struct thread *t, struct task *ta)
2867 svoboda 287
{
288
    call_t *call;
289
 
3016 svoboda 290
    mutex_lock(&TASK->udebug.lock);
3026 svoboda 291
    mutex_lock(&THREAD->udebug.lock);
3016 svoboda 292
 
3623 svoboda 293
    thread_attach(t, ta);
294
 
4692 svoboda 295
    LOG("Check state");
2867 svoboda 296
 
297
    /* Must only generate events when in debugging session */
3684 svoboda 298
    if (THREAD->udebug.active != true) {
4692 svoboda 299
        LOG("udebug.active: %s, udebug.go: %s",
300
            THREAD->udebug.active ? "Yes(+)" : "No",
301
            THREAD->udebug.go ? "Yes(-)" : "No");
3026 svoboda 302
        mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 303
        mutex_unlock(&TASK->udebug.lock);
2867 svoboda 304
        return;
2801 svoboda 305
    }
2867 svoboda 306
 
4692 svoboda 307
    LOG("Trigger event");
3018 svoboda 308
    call = THREAD->udebug.go_call;
309
    THREAD->udebug.go_call = NULL;
2867 svoboda 310
    IPC_SET_RETVAL(call->data, 0);
2903 svoboda 311
    IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B);
2867 svoboda 312
    IPC_SET_ARG2(call->data, (unative_t)t);
313
 
314
    /*
3606 svoboda 315
     * Make sure udebug.go is false when going to sleep
2867 svoboda 316
     * in case we get woken up by DEBUG_END. (At which
317
     * point it must be back to the initial true value).
318
     */
3606 svoboda 319
    THREAD->udebug.go = false;
3018 svoboda 320
    THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B;
2867 svoboda 321
 
3016 svoboda 322
    ipc_answer(&TASK->answerbox, call);
2867 svoboda 323
 
3032 svoboda 324
    mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 325
    mutex_unlock(&TASK->udebug.lock);
326
 
4692 svoboda 327
    LOG("Wait for Go");
3018 svoboda 328
    udebug_wait_for_go(&THREAD->udebug.go_wq);
2801 svoboda 329
}
330
 
3471 svoboda 331
/** Thread-termination event hook.
332
 *
333
 * Must be called when the current thread is terminating.
334
 * Generates a THREAD_E event.
335
 */
2903 svoboda 336
void udebug_thread_e_event(void)
337
{
338
    call_t *call;
339
 
3016 svoboda 340
    mutex_lock(&TASK->udebug.lock);
3026 svoboda 341
    mutex_lock(&THREAD->udebug.lock);
3016 svoboda 342
 
4692 svoboda 343
    LOG("Check state");
2903 svoboda 344
 
3606 svoboda 345
    /* Must only generate events when in debugging session. */
3684 svoboda 346
    if (THREAD->udebug.active != true) {
4692 svoboda 347
        LOG("udebug.active: %s, udebug.go: %s",
348
            THREAD->udebug.active ? "Yes" : "No",
349
            THREAD->udebug.go ? "Yes" : "No");
3026 svoboda 350
        mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 351
        mutex_unlock(&TASK->udebug.lock);
2903 svoboda 352
        return;
353
    }
354
 
4692 svoboda 355
    LOG("Trigger event");
3018 svoboda 356
    call = THREAD->udebug.go_call;
357
    THREAD->udebug.go_call = NULL;
2903 svoboda 358
    IPC_SET_RETVAL(call->data, 0);
359
    IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E);
360
 
3606 svoboda 361
    /* Prevent any further debug activity in thread. */
3684 svoboda 362
    THREAD->udebug.active = false;
3018 svoboda 363
    THREAD->udebug.cur_event = 0;       /* none */
3606 svoboda 364
    THREAD->udebug.go = false;  /* set to initial value */
3016 svoboda 365
 
366
    ipc_answer(&TASK->answerbox, call);
2903 svoboda 367
 
3032 svoboda 368
    mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 369
    mutex_unlock(&TASK->udebug.lock);
2903 svoboda 370
 
3606 svoboda 371
    /*
372
     * This event does not sleep - debugging has finished
373
     * in this thread.
374
     */
2903 svoboda 375
}
376
 
2921 svoboda 377
static void breakpoint_trap_event(uintptr_t addr, udebug_event_t etype)
2918 svoboda 378
{
379
    call_t *call;
2903 svoboda 380
 
3016 svoboda 381
    mutex_lock(&TASK->udebug.lock);
3026 svoboda 382
    mutex_lock(&THREAD->udebug.lock);
3016 svoboda 383
 
3606 svoboda 384
    /* Must only generate events when in debugging session and have go. */
3684 svoboda 385
    if (THREAD->udebug.active != true || THREAD->udebug.go == false) {
3026 svoboda 386
        mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 387
        mutex_unlock(&TASK->udebug.lock);
2918 svoboda 388
        return;
389
    }
390
 
3030 svoboda 391
    /* Verify that the event is enabled */
392
    if ((TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) {
393
        mutex_unlock(&THREAD->udebug.lock);
394
        mutex_unlock(&TASK->udebug.lock);
395
        return;
396
    }
397
 
3611 svoboda 398
    LOG("udebug_breakpoint/trap_event\n");
3018 svoboda 399
    call = THREAD->udebug.go_call;
400
    THREAD->udebug.go_call = NULL;
3016 svoboda 401
 
2918 svoboda 402
    IPC_SET_RETVAL(call->data, 0);
403
    IPC_SET_ARG1(call->data, etype);
404
    IPC_SET_ARG2(call->data, addr);
405
 
406
    /*
3606 svoboda 407
     * Make sure udebug.go is false when going to sleep
2918 svoboda 408
     * in case we get woken up by DEBUG_END. (At which
409
     * point it must be back to the initial true value).
410
     */
3606 svoboda 411
    THREAD->udebug.go = false;
3018 svoboda 412
    THREAD->udebug.cur_event = etype;
3026 svoboda 413
 
3611 svoboda 414
    LOG("- send answer\n");
3032 svoboda 415
    ipc_answer(&TASK->answerbox, call);
2918 svoboda 416
 
3032 svoboda 417
    mutex_unlock(&THREAD->udebug.lock);
3016 svoboda 418
    mutex_unlock(&TASK->udebug.lock);
2918 svoboda 419
 
3018 svoboda 420
    udebug_wait_for_go(&THREAD->udebug.go_wq);
2918 svoboda 421
}
422
 
2921 svoboda 423
void udebug_breakpoint_event(uintptr_t addr)
424
{
425
    breakpoint_trap_event(addr, UDEBUG_EVENT_BREAKPOINT);
426
}
2918 svoboda 427
 
2921 svoboda 428
void udebug_trap_event(uintptr_t addr)
429
{
430
    breakpoint_trap_event(addr, UDEBUG_EVENT_TRAP);
431
}
432
 
2870 svoboda 433
/**
434
 * Terminate task debugging session.
435
 *
3471 svoboda 436
 * Gracefully terminates the debugging session for a task. If the debugger
437
 * is still waiting for events on some threads, it will receive a
438
 * FINISHED event for each of them.
439
 *
440
 * @param ta    Task structure. ta->udebug.lock must be already locked.
441
 * @return  Zero on success or negative error code.
2870 svoboda 442
 */
443
int udebug_task_cleanup(struct task *ta)
444
{
445
    thread_t *t;
446
    link_t *cur;
447
    int flags;
3016 svoboda 448
    ipl_t ipl;
2867 svoboda 449
 
3032 svoboda 450
    if (ta->udebug.dt_state != UDEBUG_TS_BEGINNING &&
3014 svoboda 451
        ta->udebug.dt_state != UDEBUG_TS_ACTIVE) {
2870 svoboda 452
        return EINVAL;
453
    }
454
 
4692 svoboda 455
    LOG("Task %" PRIu64, ta->taskid);
456
 
2870 svoboda 457
    /* Finish debugging of all userspace threads */
458
    for (cur = ta->th_head.next; cur != &ta->th_head; cur = cur->next) {
459
        t = list_get_instance(cur, thread_t, th_link);
460
 
3026 svoboda 461
        mutex_lock(&t->udebug.lock);
462
 
3016 svoboda 463
        ipl = interrupts_disable();
2870 svoboda 464
        spinlock_lock(&t->lock);
465
 
466
        flags = t->flags;
467
 
468
        spinlock_unlock(&t->lock);
3026 svoboda 469
        interrupts_restore(ipl);
2870 svoboda 470
 
3606 svoboda 471
        /* Only process userspace threads. */
2870 svoboda 472
        if ((flags & THREAD_FLAG_USPACE) != 0) {
3606 svoboda 473
            /* Prevent any further debug activity in thread. */
3684 svoboda 474
            t->udebug.active = false;
3018 svoboda 475
            t->udebug.cur_event = 0;    /* none */
2870 svoboda 476
 
3606 svoboda 477
            /* Is the thread still go? */
478
            if (t->udebug.go == true) {
2870 svoboda 479
                /*
3684 svoboda 480
                * Yes, so clear go. As active == false,
2870 svoboda 481
                 * this doesn't affect anything.
482
                 */
3606 svoboda 483
                t->udebug.go = false;  
2870 svoboda 484
 
485
                /* Answer GO call */
4692 svoboda 486
                LOG("Answer GO call with EVENT_FINISHED.");
3018 svoboda 487
                IPC_SET_RETVAL(t->udebug.go_call->data, 0);
3471 svoboda 488
                IPC_SET_ARG1(t->udebug.go_call->data,
489
                    UDEBUG_EVENT_FINISHED);
3026 svoboda 490
 
3018 svoboda 491
                ipc_answer(&ta->answerbox, t->udebug.go_call);
492
                t->udebug.go_call = NULL;
2870 svoboda 493
            } else {
494
                /*
495
                 * Debug_stop is already at initial value.
496
                 * Yet this means the thread needs waking up.
497
                 */
498
 
499
                /*
500
                 * t's lock must not be held when calling
501
                 * waitq_wakeup.
502
                 */
3018 svoboda 503
                waitq_wakeup(&t->udebug.go_wq, WAKEUP_FIRST);
2870 svoboda 504
            }
505
        }
3026 svoboda 506
        mutex_unlock(&t->udebug.lock);
2870 svoboda 507
    }
508
 
3014 svoboda 509
    ta->udebug.dt_state = UDEBUG_TS_INACTIVE;
510
    ta->udebug.debugger = NULL;
2870 svoboda 511
 
512
    return 0;
513
}
514
 
515
 
2801 svoboda 516
/** @}
517
 */