WebSVN – HelenOS – Blame – /branches/tracing/kernel/generic/src/udebug/udebug.c

Rev	Author	Line No.	Line
2801	svoboda	1	/** @addtogroup generic
		2	* @{
		3	*/
		4
		5	/**
		6	* @file
		7	* @brief Tdebug.
		8	*/
		9
		10	#include <synch/waitq.h>
		11	#include <console/klog.h>
2813	svoboda	12	#include <udebug/udebug.h>
2801	svoboda	13	#include <arch.h>
		14
2804	svoboda	15	void udebug_stoppable_begin(void)
2801	svoboda	16	{
2804	svoboda	17	int nsc;
		18	call_t *db_call;
2823	svoboda	19	ipl_t ipl;
2804	svoboda	20
2823	svoboda	21	ipl = interrupts_disable();
2804	svoboda	22	spinlock_lock(&TASK->lock);
		23
		24	nsc = --TASK->not_stoppable_count;
		25	db_call = TASK->debug_begin_call;
		26
2825	svoboda	27	if (TASK->dt_state == UDEBUG_TS_BEGINNING) {
2804	svoboda	28	klog_printf("udebug_stoppable_begin");
		29	klog_printf(" - nsc := %d", nsc);
		30	}
		31
2825	svoboda	32	if (TASK->dt_state == UDEBUG_TS_BEGINNING && nsc == 0) {
		33	TASK->dt_state = UDEBUG_TS_ACTIVE;
2801	svoboda	34	TASK->debug_begin_call = NULL;
2804	svoboda	35	spinlock_unlock(&TASK->lock);
2823	svoboda	36	interrupts_restore(ipl);
2804	svoboda	37
		38	IPC_SET_RETVAL(db_call->data, 0);
		39	klog_printf("udebug_stoppable_begin/ipc_answer");
		40	ipc_answer(&TASK->answerbox, db_call);
		41	} else {
		42	spinlock_unlock(&TASK->lock);
2823	svoboda	43	interrupts_restore(ipl);
2804	svoboda	44	}
		45	}
		46
		47	void udebug_stoppable_end(void)
		48	{
2823	svoboda	49	ipl_t ipl;
		50
2804	svoboda	51	restart:
2823	svoboda	52	ipl = interrupts_disable();
2804	svoboda	53	spinlock_lock(&TASK->lock);
		54
2825	svoboda	55	if ((TASK->dt_state == UDEBUG_TS_BEGINNING \|\|
		56	TASK->dt_state == UDEBUG_TS_ACTIVE) &&
		57	THREAD->debug_stop == true) {
2804	svoboda	58	TASK->debug_begin_call = NULL;
		59	spinlock_unlock(&TASK->lock);
2823	svoboda	60	interrupts_restore(ipl);
		61
2804	svoboda	62	klog_printf("udebug_stoppable_end: waitq_sleep");
2801	svoboda	63	waitq_sleep(&THREAD->go_wq);
2804	svoboda	64	goto restart;
		65	/* must try again - have to lose stoppability atomically */
		66	} else {
		67	++TASK->not_stoppable_count;
		68	spinlock_unlock(&TASK->lock);
2823	svoboda	69	interrupts_restore(ipl);
2801	svoboda	70	}
		71	}
		72
2805	svoboda	73	void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3,
		74	unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc)
2801	svoboda	75	{
2805	svoboda	76	call_t *call;
2823	svoboda	77	ipl_t ipl;
2805	svoboda	78
2823	svoboda	79	ipl = interrupts_disable();
2848	svoboda	80	spinlock_lock(&THREAD->debug_lock);
2823	svoboda	81
2854	svoboda	82	/* Must only generate events when in debugging session and have go */
2867	svoboda	83	if (THREAD->debug_active != true \|\|
		84	THREAD->debug_stop == true) {
		85	spinlock_unlock(&THREAD->debug_lock);
		86	interrupts_restore(ipl);
		87	return;
		88	}
2804	svoboda	89
2867	svoboda	90	klog_printf("udebug_syscall_event");
		91	call = THREAD->debug_go_call;
		92	IPC_SET_RETVAL(call->data, 0);
		93	IPC_SET_ARG1(call->data, UDEBUG_EVENT_SYSCALL);
		94	IPC_SET_ARG2(call->data, id);
		95	IPC_SET_ARG3(call->data, rc);
		96	klog_printf("udebug_syscall_event/ipc_answer");
2805	svoboda	97
2867	svoboda	98	THREAD->syscall_args[0] = a1;
		99	THREAD->syscall_args[1] = a2;
		100	THREAD->syscall_args[2] = a3;
		101	THREAD->syscall_args[3] = a4;
		102	THREAD->syscall_args[4] = a5;
		103	THREAD->syscall_args[5] = a6;
2866	svoboda	104
2867	svoboda	105	/*
		106	* Make sure debug_stop is true when going to sleep
		107	* in case we get woken up by DEBUG_END. (At which
		108	* point it must be back to the initial true value).
		109	*/
		110	THREAD->debug_stop = true;
2825	svoboda	111
2867	svoboda	112	THREAD->cur_event = UDEBUG_EVENT_SYSCALL;
		113	spinlock_unlock(&THREAD->debug_lock);
2834	svoboda	114
2867	svoboda	115	spinlock_lock(&TASK->lock);
		116	ipc_answer(&TASK->answerbox, THREAD->debug_go_call);
		117	spinlock_unlock(&TASK->lock);
2823	svoboda	118
2867	svoboda	119	interrupts_restore(ipl);
		120
		121	waitq_sleep(&THREAD->go_wq);
		122	}
		123
		124	void udebug_new_thread_event(struct thread *t)
		125	{
		126	call_t *call;
		127	ipl_t ipl;
		128
		129	ipl = interrupts_disable();
		130	spinlock_lock(&THREAD->debug_lock);
		131
		132	klog_printf("udebug_new_thread_event");
		133	klog_printf("- check state");
		134
		135	/* Must only generate events when in debugging session */
		136	if (THREAD->debug_active != true) {
		137	klog_printf("- debug_active: %s, debug_stop: %s",
		138	THREAD->debug_active ? "yes(+)" : "no(-)",
		139	THREAD->debug_stop ? "yes(-)" : "no(+)");
2848	svoboda	140	spinlock_unlock(&THREAD->debug_lock);
2823	svoboda	141	interrupts_restore(ipl);
2867	svoboda	142	return;
2801	svoboda	143	}
2867	svoboda	144
		145	klog_printf("- trigger event");
		146
		147	call = THREAD->debug_go_call;
		148	IPC_SET_RETVAL(call->data, 0);
		149	IPC_SET_ARG1(call->data, UDEBUG_EVENT_NEW_THREAD);
		150	IPC_SET_ARG2(call->data, (unative_t)t);
		151
		152	/*
		153	* Make sure debug_stop is true when going to sleep
		154	* in case we get woken up by DEBUG_END. (At which
		155	* point it must be back to the initial true value).
		156	*/
		157	THREAD->debug_stop = true;
		158
		159	THREAD->cur_event = UDEBUG_EVENT_NEW_THREAD;
		160	spinlock_unlock(&THREAD->debug_lock);
		161
		162	spinlock_lock(&TASK->lock);
		163	ipc_answer(&TASK->answerbox, THREAD->debug_go_call);
		164	spinlock_unlock(&TASK->lock);
		165
		166	interrupts_restore(ipl);
		167	klog_printf("- sleep");
		168
		169	waitq_sleep(&THREAD->go_wq);
2801	svoboda	170	}
		171
2867	svoboda	172
2801	svoboda	173	/** @}
		174	*/

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