WebSVN – HelenOS – Diff – /branches/sparc/kernel/generic/src/udebug/udebug.c



     * At the beginning the thread is stoppable, so int_lock be set, too.
     */
    atomic_set(&ut->int_lock, 1);
 
    ut->go_call = NULL;
    ut->go = false;
    ut->stoppable = true;
    ut->debug_active = false;
    ut->cur_event = 0; /* none */
}
 

    } else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) {
        /*
         * Active debugging session
         */
 
        if (THREAD->udebug.debug_active == true &&
            THREAD->udebug.go == false) {
            /*
             * Thread was requested to stop - answer go call
             */
 
            /* Make sure nobody takes this call away from us */

restart:
    mutex_lock(&TASK->udebug.lock);
    mutex_lock(&THREAD->udebug.lock);
 
    if (THREAD->udebug.debug_active &&
        THREAD->udebug.go == false) {
        TASK->udebug.begin_call = NULL;
        mutex_unlock(&THREAD->udebug.lock);
        mutex_unlock(&TASK->udebug.lock);
 
        udebug_wait_for_go(&THREAD->udebug.go_wq);
 
        goto restart;
        /* Must try again - have to lose stoppability atomically. */
    } else {
        ++TASK->udebug.not_stoppable_count;
        ASSERT(THREAD->udebug.stoppable == true);
        THREAD->udebug.stoppable = false;
 

    }
 
    mutex_lock(&TASK->udebug.lock);
    mutex_lock(&THREAD->udebug.lock);
 
    /* Must only generate events when in debugging session and is go. */
    if (THREAD->udebug.debug_active != true ||
        THREAD->udebug.go == false ||
        (TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) {
        mutex_unlock(&THREAD->udebug.lock);
        mutex_unlock(&TASK->udebug.lock);
        return;
    }

    THREAD->udebug.syscall_args[3] = a4;
    THREAD->udebug.syscall_args[4] = a5;
    THREAD->udebug.syscall_args[5] = a6;
 
    /*
     * Make sure udebug.go is false when going to sleep
     * in case we get woken up by DEBUG_END. (At which
     * point it must be back to the initial true value).
     */
    THREAD->udebug.go = false;
    THREAD->udebug.cur_event = etype;
 
    ipc_answer(&TASK->answerbox, call);
 
    mutex_unlock(&THREAD->udebug.lock);

    LOG("udebug_thread_b_event\n");
    LOG("- check state\n");
 
    /* Must only generate events when in debugging session */
    if (THREAD->udebug.debug_active != true) {
        LOG("- debug_active: %s, udebug.go: %s\n",
            THREAD->udebug.debug_active ? "yes(+)" : "no(-)",
            THREAD->udebug.go ? "yes(-)" : "no(+)");
        mutex_unlock(&THREAD->udebug.lock);
        mutex_unlock(&TASK->udebug.lock);
        return;
    }
 

    IPC_SET_RETVAL(call->data, 0);
    IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B);
    IPC_SET_ARG2(call->data, (unative_t)t);
 
    /*
     * Make sure udebug.go is false when going to sleep
     * in case we get woken up by DEBUG_END. (At which
     * point it must be back to the initial true value).
     */
    THREAD->udebug.go = false;
    THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B;
 
    ipc_answer(&TASK->answerbox, call);
 
    mutex_unlock(&THREAD->udebug.lock);

    mutex_lock(&THREAD->udebug.lock);
 
    LOG("udebug_thread_e_event\n");
    LOG("- check state\n");
 
    /* Must only generate events when in debugging session. */
    if (THREAD->udebug.debug_active != true) {
/*      printf("- debug_active: %s, udebug.go: %s\n",
            THREAD->udebug.debug_active ? "yes(+)" : "no(-)",
            THREAD->udebug.go ? "yes(-)" : "no(+)");*/
        mutex_unlock(&THREAD->udebug.lock);
        mutex_unlock(&TASK->udebug.lock);
        return;
    }
 

    call = THREAD->udebug.go_call;
    THREAD->udebug.go_call = NULL;
    IPC_SET_RETVAL(call->data, 0);
    IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E);
 
    /* Prevent any further debug activity in thread. */
    THREAD->udebug.debug_active = false;
    THREAD->udebug.cur_event = 0;       /* none */
    THREAD->udebug.go = false;  /* set to initial value */
 
    ipc_answer(&TASK->answerbox, call);
 
    mutex_unlock(&THREAD->udebug.lock);
    mutex_unlock(&TASK->udebug.lock);
 
    /* Leave int_lock enabled. */
    /* This event does not sleep - debugging has finished in this thread. */
}
 
/**
 * Terminate task debugging session.
 *

        flags = t->flags;
 
        spinlock_unlock(&t->lock);
        interrupts_restore(ipl);
 
        /* Only process userspace threads. */
        if ((flags & THREAD_FLAG_USPACE) != 0) {
            /* Prevent any further debug activity in thread. */
            t->udebug.debug_active = false;
            t->udebug.cur_event = 0;    /* none */
 
            /* Is the thread still go? */
            if (t->udebug.go == true) {
                /*
                * Yes, so clear go. As debug_active == false,
                 * this doesn't affect anything.
                 */
                t->udebug.go = false;  
 
                /* Answer GO call */
                LOG("answer GO call with EVENT_FINISHED\n");
                IPC_SET_RETVAL(t->udebug.go_call->data, 0);
                IPC_SET_ARG1(t->udebug.go_call->data,

Subversion Repositories HelenOS

(root)/branches/sparc/kernel/generic/src/udebug/udebug.c – Rev 3492 → 3602

Rev 3492		Rev 3602
Line 93...		Line 93...
93	* At the beginning the thread is stoppable, so int_lock be set, too.	93	* At the beginning the thread is stoppable, so int_lock be set, too.
94	*/	94	*/
95	atomic_set(&ut->int_lock, 1);	95	atomic_set(&ut->int_lock, 1);
96		96
97	ut->go_call = NULL;	97	ut->go_call = NULL;
98	ut->stop = true;	98	ut->go = false;
99	ut->stoppable = true;	99	ut->stoppable = true;
100	ut->debug_active = false;	100	ut->debug_active = false;
101	ut->cur_event = 0; /* none */	101	ut->cur_event = 0; /* none */
102	}	102	}
103		103
Line 196...		Line 196...
196	} else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) {	196	} else if (TASK->udebug.dt_state == UDEBUG_TS_ACTIVE) {
197	/*	197	/*
198	* Active debugging session	198	* Active debugging session
199	*/	199	*/
200		200
201	if (THREAD->udebug.debug_active && THREAD->udebug.stop) {	201	if (THREAD->udebug.debug_active == true &&
-		202	THREAD->udebug.go == false) {
202	/*	203	/*
203	* Thread was requested to stop - answer go call	204	* Thread was requested to stop - answer go call
204	*/	205	*/
205		206
206	/* Make sure nobody takes this call away from us */	207	/* Make sure nobody takes this call away from us */
Line 237...		Line 238...
237	restart:	238	restart:
238	mutex_lock(&TASK->udebug.lock);	239	mutex_lock(&TASK->udebug.lock);
239	mutex_lock(&THREAD->udebug.lock);	240	mutex_lock(&THREAD->udebug.lock);
240		241
241	if (THREAD->udebug.debug_active &&	242	if (THREAD->udebug.debug_active &&
242	THREAD->udebug.stop == true) {	243	THREAD->udebug.go == false) {
243	TASK->udebug.begin_call = NULL;	244	TASK->udebug.begin_call = NULL;
244	mutex_unlock(&THREAD->udebug.lock);	245	mutex_unlock(&THREAD->udebug.lock);
245	mutex_unlock(&TASK->udebug.lock);	246	mutex_unlock(&TASK->udebug.lock);
246		247
247	udebug_wait_for_go(&THREAD->udebug.go_wq);	248	udebug_wait_for_go(&THREAD->udebug.go_wq);
248		249
249	goto restart;	250	goto restart;
250	/* must try again - have to lose stoppability atomically */	251	/* Must try again - have to lose stoppability atomically. */
251	} else {	252	} else {
252	++TASK->udebug.not_stoppable_count;	253	++TASK->udebug.not_stoppable_count;
253	ASSERT(THREAD->udebug.stoppable == true);	254	ASSERT(THREAD->udebug.stoppable == true);
254	THREAD->udebug.stoppable = false;	255	THREAD->udebug.stoppable = false;
255		256
Line 319...		Line 320...
319	}	320	}
320		321
321	mutex_lock(&TASK->udebug.lock);	322	mutex_lock(&TASK->udebug.lock);
322	mutex_lock(&THREAD->udebug.lock);	323	mutex_lock(&THREAD->udebug.lock);
323		324
324	/* Must only generate events when in debugging session and have go */	325	/* Must only generate events when in debugging session and is go. */
325	if (THREAD->udebug.debug_active != true \|\|	326	if (THREAD->udebug.debug_active != true \|\|
326	THREAD->udebug.stop == true \|\|	327	THREAD->udebug.go == false \|\|
327	(TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) {	328	(TASK->udebug.evmask & UDEBUG_EVMASK(etype)) == 0) {
328	mutex_unlock(&THREAD->udebug.lock);	329	mutex_unlock(&THREAD->udebug.lock);
329	mutex_unlock(&TASK->udebug.lock);	330	mutex_unlock(&TASK->udebug.lock);
330	return;	331	return;
331	}	332	}
Line 346...		Line 347...
346	THREAD->udebug.syscall_args[3] = a4;	347	THREAD->udebug.syscall_args[3] = a4;
347	THREAD->udebug.syscall_args[4] = a5;	348	THREAD->udebug.syscall_args[4] = a5;
348	THREAD->udebug.syscall_args[5] = a6;	349	THREAD->udebug.syscall_args[5] = a6;
349		350
350	/*	351	/*
351	* Make sure udebug.stop is true when going to sleep	352	* Make sure udebug.go is false when going to sleep
352	* in case we get woken up by DEBUG_END. (At which	353	* in case we get woken up by DEBUG_END. (At which
353	* point it must be back to the initial true value).	354	* point it must be back to the initial true value).
354	*/	355	*/
355	THREAD->udebug.stop = true;	356	THREAD->udebug.go = false;
356	THREAD->udebug.cur_event = etype;	357	THREAD->udebug.cur_event = etype;
357		358
358	ipc_answer(&TASK->answerbox, call);	359	ipc_answer(&TASK->answerbox, call);
359		360
360	mutex_unlock(&THREAD->udebug.lock);	361	mutex_unlock(&THREAD->udebug.lock);
Line 385...		Line 386...
385	LOG("udebug_thread_b_event\n");	386	LOG("udebug_thread_b_event\n");
386	LOG("- check state\n");	387	LOG("- check state\n");
387		388
388	/* Must only generate events when in debugging session */	389	/* Must only generate events when in debugging session */
389	if (THREAD->udebug.debug_active != true) {	390	if (THREAD->udebug.debug_active != true) {
390	LOG("- debug_active: %s, udebug.stop: %s\n",	391	LOG("- debug_active: %s, udebug.go: %s\n",
391	THREAD->udebug.debug_active ? "yes(+)" : "no(-)",	392	THREAD->udebug.debug_active ? "yes(+)" : "no(-)",
392	THREAD->udebug.stop ? "yes(-)" : "no(+)");	393	THREAD->udebug.go ? "yes(-)" : "no(+)");
393	mutex_unlock(&THREAD->udebug.lock);	394	mutex_unlock(&THREAD->udebug.lock);
394	mutex_unlock(&TASK->udebug.lock);	395	mutex_unlock(&TASK->udebug.lock);
395	return;	396	return;
396	}	397	}
397		398
Line 402...		Line 403...
402	IPC_SET_RETVAL(call->data, 0);	403	IPC_SET_RETVAL(call->data, 0);
403	IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B);	404	IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_B);
404	IPC_SET_ARG2(call->data, (unative_t)t);	405	IPC_SET_ARG2(call->data, (unative_t)t);
405		406
406	/*	407	/*
407	* Make sure udebug.stop is true when going to sleep	408	* Make sure udebug.go is false when going to sleep
408	* in case we get woken up by DEBUG_END. (At which	409	* in case we get woken up by DEBUG_END. (At which
409	* point it must be back to the initial true value).	410	* point it must be back to the initial true value).
410	*/	411	*/
411	THREAD->udebug.stop = true;	412	THREAD->udebug.go = false;
412	THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B;	413	THREAD->udebug.cur_event = UDEBUG_EVENT_THREAD_B;
413		414
414	ipc_answer(&TASK->answerbox, call);	415	ipc_answer(&TASK->answerbox, call);
415		416
416	mutex_unlock(&THREAD->udebug.lock);	417	mutex_unlock(&THREAD->udebug.lock);
Line 437...		Line 438...
437	mutex_lock(&THREAD->udebug.lock);	438	mutex_lock(&THREAD->udebug.lock);
438		439
439	LOG("udebug_thread_e_event\n");	440	LOG("udebug_thread_e_event\n");
440	LOG("- check state\n");	441	LOG("- check state\n");
441		442
442	/* Must only generate events when in debugging session */	443	/* Must only generate events when in debugging session. */
443	if (THREAD->udebug.debug_active != true) {	444	if (THREAD->udebug.debug_active != true) {
444	/* printf("- debug_active: %s, udebug.stop: %s\n",	445	/* printf("- debug_active: %s, udebug.go: %s\n",
445	THREAD->udebug.debug_active ? "yes(+)" : "no(-)",	446	THREAD->udebug.debug_active ? "yes(+)" : "no(-)",
446	THREAD->udebug.stop ? "yes(-)" : "no(+)");*/	447	THREAD->udebug.go ? "yes(-)" : "no(+)");*/
447	mutex_unlock(&THREAD->udebug.lock);	448	mutex_unlock(&THREAD->udebug.lock);
448	mutex_unlock(&TASK->udebug.lock);	449	mutex_unlock(&TASK->udebug.lock);
449	return;	450	return;
450	}	451	}
451		452
Line 454...		Line 455...
454	call = THREAD->udebug.go_call;	455	call = THREAD->udebug.go_call;
455	THREAD->udebug.go_call = NULL;	456	THREAD->udebug.go_call = NULL;
456	IPC_SET_RETVAL(call->data, 0);	457	IPC_SET_RETVAL(call->data, 0);
457	IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E);	458	IPC_SET_ARG1(call->data, UDEBUG_EVENT_THREAD_E);
458		459
459	/* Prevent any further debug activity in thread */	460	/* Prevent any further debug activity in thread. */
460	THREAD->udebug.debug_active = false;	461	THREAD->udebug.debug_active = false;
461	THREAD->udebug.cur_event = 0; /* none */	462	THREAD->udebug.cur_event = 0; /* none */
462	THREAD->udebug.stop = true; /* set to initial value */	463	THREAD->udebug.go = false; /* set to initial value */
463		464
464	ipc_answer(&TASK->answerbox, call);	465	ipc_answer(&TASK->answerbox, call);
465		466
466	mutex_unlock(&THREAD->udebug.lock);	467	mutex_unlock(&THREAD->udebug.lock);
467	mutex_unlock(&TASK->udebug.lock);	468	mutex_unlock(&TASK->udebug.lock);
468		469
469	/* Leave int_lock enabled */	470	/* Leave int_lock enabled. */
470	/* This event does not sleep - debugging has finished in this thread */	471	/* This event does not sleep - debugging has finished in this thread. */
471	}	472	}
472		473
473	/**	474	/**
474	* Terminate task debugging session.	475	* Terminate task debugging session.
475	*	476	*
Line 510...		Line 511...
510	flags = t->flags;	511	flags = t->flags;
511		512
512	spinlock_unlock(&t->lock);	513	spinlock_unlock(&t->lock);
513	interrupts_restore(ipl);	514	interrupts_restore(ipl);
514		515
515	/* Only process userspace threads */	516	/* Only process userspace threads. */
516	if ((flags & THREAD_FLAG_USPACE) != 0) {	517	if ((flags & THREAD_FLAG_USPACE) != 0) {
517	/* Prevent any further debug activity in thread */	518	/* Prevent any further debug activity in thread. */
518	t->udebug.debug_active = false;	519	t->udebug.debug_active = false;
519	t->udebug.cur_event = 0; /* none */	520	t->udebug.cur_event = 0; /* none */
520		521
521	/* Still has go? */	522	/* Is the thread still go? */
522	if (t->udebug.stop == false) {	523	if (t->udebug.go == true) {
523	/*	524	/*
524	* Yes, so clear go. As debug_active == false,	525	* Yes, so clear go. As debug_active == false,
525	* this doesn't affect anything.	526	* this doesn't affect anything.
526	*/	527	*/
527	t->udebug.stop = true;	528	t->udebug.go = false;
528		529
529	/* Answer GO call */	530	/* Answer GO call */
530	LOG("answer GO call with EVENT_FINISHED\n");	531	LOG("answer GO call with EVENT_FINISHED\n");
531	IPC_SET_RETVAL(t->udebug.go_call->data, 0);	532	IPC_SET_RETVAL(t->udebug.go_call->data, 0);
532	IPC_SET_ARG1(t->udebug.go_call->data,	533	IPC_SET_ARG1(t->udebug.go_call->data,