1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Michel Dagenais
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
24 #include <lttv/lttv.h>
25 #include <lttv/tracecontext.h>
26 #include <ltt/event.h>
27 #include <ltt/trace.h>
28 #include <lttv/filter.h>
31 #define min(a,b) (((a)<(b))?(a):(b))
34 gint
compare_tracefile(gconstpointer a
, gconstpointer b
)
38 const LttvTracefileContext
*trace_a
= (const LttvTracefileContext
*)a
;
39 const LttvTracefileContext
*trace_b
= (const LttvTracefileContext
*)b
;
41 if(likely(trace_a
!= trace_b
)) {
42 comparison
= ltt_time_compare(trace_a
->timestamp
, trace_b
->timestamp
);
43 if(unlikely(comparison
== 0)) {
44 if(trace_a
->index
< trace_b
->index
) comparison
= -1;
45 else if(trace_a
->index
> trace_b
->index
) comparison
= 1;
46 else if(trace_a
->t_context
->index
< trace_b
->t_context
->index
)
48 else if(trace_a
->t_context
->index
> trace_b
->t_context
->index
)
55 typedef struct _LttvTracefileContextPosition
{
56 LttEventPosition
*event
;
57 LttvTracefileContext
*tfc
;
58 gboolean used
; /* Tells if the tfc is at end of traceset position */
59 } LttvTracefileContextPosition
;
62 struct _LttvTracesetContextPosition
{
63 GArray
*tfcp
; /* Array of LttvTracefileContextPosition */
64 LttTime timestamp
; /* Current time at the saved position */
65 /* If ltt_time_infinite : no position is
66 * set, else, a position is set (may be end
67 * of trace, with ep->len == 0) */
70 void lttv_context_init(LttvTracesetContext
*self
, LttvTraceset
*ts
)
72 LTTV_TRACESET_CONTEXT_GET_CLASS(self
)->init(self
, ts
);
76 void lttv_context_fini(LttvTracesetContext
*self
)
78 LTTV_TRACESET_CONTEXT_GET_CLASS(self
)->fini(self
);
83 lttv_context_new_traceset_context(LttvTracesetContext
*self
)
85 return LTTV_TRACESET_CONTEXT_GET_CLASS(self
)->new_traceset_context(self
);
92 lttv_context_new_trace_context(LttvTracesetContext
*self
)
94 return LTTV_TRACESET_CONTEXT_GET_CLASS(self
)->new_trace_context(self
);
98 LttvTracefileContext
*
99 lttv_context_new_tracefile_context(LttvTracesetContext
*self
)
101 return LTTV_TRACESET_CONTEXT_GET_CLASS(self
)->new_tracefile_context(self
);
104 /****************************************************************************
105 * lttv_traceset_context_compute_time_span
107 * Keep the time span is sync with on the fly addition and removal of traces
108 * in a trace set. It must be called each time a trace is added/removed from
109 * the traceset. It could be more efficient to call it only once a bunch
110 * of traces are loaded, but the calculation is not long, so it's not
113 * Author : Xang Xiu Yang
114 ***************************************************************************/
115 static void lttv_traceset_context_compute_time_span(
116 LttvTracesetContext
*self
,
117 TimeInterval
*time_span
)
119 LttvTraceset
* traceset
= self
->ts
;
120 int numTraces
= lttv_traceset_number(traceset
);
123 LttvTraceContext
*tc
;
126 time_span
->start_time
.tv_sec
= 0;
127 time_span
->start_time
.tv_nsec
= 0;
128 time_span
->end_time
.tv_sec
= 0;
129 time_span
->end_time
.tv_nsec
= 0;
131 for(i
=0; i
<numTraces
;i
++){
132 tc
= self
->traces
[i
];
135 ltt_trace_time_span_get(trace
, &s
, &e
);
136 tc
->time_span
.start_time
= s
;
137 tc
->time_span
.end_time
= e
;
140 time_span
->start_time
= s
;
141 time_span
->end_time
= e
;
143 if(s
.tv_sec
< time_span
->start_time
.tv_sec
144 || (s
.tv_sec
== time_span
->start_time
.tv_sec
145 && s
.tv_nsec
< time_span
->start_time
.tv_nsec
))
146 time_span
->start_time
= s
;
147 if(e
.tv_sec
> time_span
->end_time
.tv_sec
148 || (e
.tv_sec
== time_span
->end_time
.tv_sec
149 && e
.tv_nsec
> time_span
->end_time
.tv_nsec
))
150 time_span
->end_time
= e
;
155 static void init_tracefile_context(LttTracefile
*tracefile
,
156 LttvTraceContext
*tc
)
158 LttvTracefileContext
*tfc
;
159 LttvTracesetContext
*tsc
= tc
->ts_context
;
161 tfc
= LTTV_TRACESET_CONTEXT_GET_CLASS(tsc
)->new_tracefile_context(tsc
);
163 tfc
->index
= tc
->tracefiles
->len
;
164 tc
->tracefiles
= g_array_append_val(tc
->tracefiles
, tfc
);
169 tfc
->event
= lttv_hooks_new();
170 tfc
->event_by_id
= lttv_hooks_by_id_new();
171 tfc
->a
= g_object_new(LTTV_ATTRIBUTE_TYPE
, NULL
);
172 tfc
->target_pid
= -1;
177 init(LttvTracesetContext
*self
, LttvTraceset
*ts
)
181 LttvTraceContext
*tc
;
183 GData
**tracefiles_groups
;
185 struct compute_tracefile_group_args args
;
187 nb_trace
= lttv_traceset_number(ts
);
189 self
->traces
= g_new(LttvTraceContext
*, nb_trace
);
190 self
->a
= g_object_new(LTTV_ATTRIBUTE_TYPE
, NULL
);
191 self
->ts_a
= lttv_traceset_attribute(ts
);
192 for(i
= 0 ; i
< nb_trace
; i
++) {
193 tc
= LTTV_TRACESET_CONTEXT_GET_CLASS(self
)->new_trace_context(self
);
194 self
->traces
[i
] = tc
;
196 tc
->ts_context
= self
;
198 tc
->vt
= lttv_traceset_get(ts
, i
);
199 tc
->t
= lttv_trace(tc
->vt
);
200 tc
->a
= g_object_new(LTTV_ATTRIBUTE_TYPE
, NULL
);
201 tc
->t_a
= lttv_trace_attribute(tc
->vt
);
202 tc
->tracefiles
= g_array_sized_new(FALSE
, TRUE
,
203 sizeof(LttvTracefileContext
*), 10);
205 tracefiles_groups
= ltt_trace_get_tracefiles_groups(tc
->t
);
206 if(tracefiles_groups
!= NULL
) {
207 args
.func
= (ForEachTraceFileFunc
)init_tracefile_context
;
210 g_datalist_foreach(tracefiles_groups
,
211 (GDataForeachFunc
)compute_tracefile_group
,
216 nb_control
= ltt_trace_control_tracefile_number(tc
->t
);
217 nb_per_cpu
= ltt_trace_per_cpu_tracefile_number(tc
->t
);
218 nb_tracefile
= nb_control
+ nb_per_cpu
;
219 tc
->tracefiles
= g_new(LttvTracefileContext
*, nb_tracefile
);
221 for(j
= 0 ; j
< nb_tracefile
; j
++) {
222 tfc
= LTTV_TRACESET_CONTEXT_GET_CLASS(self
)->new_tracefile_context(self
);
223 tc
->tracefiles
[j
] = tfc
;
228 tfc
->tf
= ltt_trace_control_tracefile_get(tc
->t
, j
);
231 tfc
->control
= FALSE
;
232 tfc
->tf
= ltt_trace_per_cpu_tracefile_get(tc
->t
, j
- nb_control
);
236 tfc
->e
= ltt_event_new();
237 tfc
->event
= lttv_hooks_new();
238 tfc
->event_by_id
= lttv_hooks_by_id_new();
239 tfc
->a
= g_object_new(LTTV_ATTRIBUTE_TYPE
, NULL
);
244 self
->sync_position
= lttv_traceset_context_position_new(self
);
245 self
->pqueue
= g_tree_new(compare_tracefile
);
246 lttv_process_traceset_seek_time(self
, ltt_time_zero
);
247 lttv_traceset_context_compute_time_span(self
, &self
->time_span
);
252 void fini(LttvTracesetContext
*self
)
254 guint i
, j
, nb_trace
, nb_tracefile
;
256 LttvTraceContext
*tc
;
258 LttvTracefileContext
**tfc
;
260 LttvTraceset
*ts
= self
->ts
;
262 g_tree_destroy(self
->pqueue
);
263 g_object_unref(self
->a
);
264 lttv_traceset_context_position_destroy(self
->sync_position
);
266 nb_trace
= lttv_traceset_number(ts
);
268 for(i
= 0 ; i
< nb_trace
; i
++) {
269 tc
= self
->traces
[i
];
271 g_object_unref(tc
->a
);
273 nb_tracefile
= tc
->tracefiles
->len
;
275 for(j
= 0 ; j
< nb_tracefile
; j
++) {
276 tfc
= &g_array_index(tc
->tracefiles
, LttvTracefileContext
*, j
);
277 lttv_hooks_destroy((*tfc
)->event
);
278 lttv_hooks_by_id_destroy((*tfc
)->event_by_id
);
279 g_object_unref((*tfc
)->a
);
280 g_object_unref(*tfc
);
282 g_array_free(tc
->tracefiles
, TRUE
);
285 g_free(self
->traces
);
289 void lttv_traceset_context_add_hooks(LttvTracesetContext
*self
,
290 LttvHooks
*before_traceset
,
291 LttvHooks
*before_trace
,
292 LttvHooks
*before_tracefile
,
294 LttvHooksById
*event_by_id
)
296 LttvTraceset
*ts
= self
->ts
;
300 LttvTraceContext
*tc
;
302 lttv_hooks_call(before_traceset
, self
);
304 nb_trace
= lttv_traceset_number(ts
);
306 for(i
= 0 ; i
< nb_trace
; i
++) {
307 tc
= self
->traces
[i
];
308 lttv_trace_context_add_hooks(tc
,
317 void lttv_traceset_context_remove_hooks(LttvTracesetContext
*self
,
318 LttvHooks
*after_traceset
,
319 LttvHooks
*after_trace
,
320 LttvHooks
*after_tracefile
,
322 LttvHooksById
*event_by_id
)
325 LttvTraceset
*ts
= self
->ts
;
329 LttvTraceContext
*tc
;
331 nb_trace
= lttv_traceset_number(ts
);
333 for(i
= 0 ; i
< nb_trace
; i
++) {
334 tc
= self
->traces
[i
];
335 lttv_trace_context_remove_hooks(tc
,
342 lttv_hooks_call(after_traceset
, self
);
347 void lttv_trace_context_add_hooks(LttvTraceContext
*self
,
348 LttvHooks
*before_trace
,
349 LttvHooks
*before_tracefile
,
351 LttvHooksById
*event_by_id
)
353 guint i
, nb_tracefile
;
355 LttvTracefileContext
**tfc
;
357 lttv_hooks_call(before_trace
, self
);
359 nb_tracefile
= self
->tracefiles
->len
;
361 for(i
= 0 ; i
< nb_tracefile
; i
++) {
362 tfc
= &g_array_index(self
->tracefiles
, LttvTracefileContext
*, i
);
363 lttv_tracefile_context_add_hooks(*tfc
,
372 void lttv_trace_context_remove_hooks(LttvTraceContext
*self
,
373 LttvHooks
*after_trace
,
374 LttvHooks
*after_tracefile
,
376 LttvHooksById
*event_by_id
)
378 guint i
, nb_tracefile
;
380 LttvTracefileContext
**tfc
;
382 nb_tracefile
= self
->tracefiles
->len
;
384 for(i
= 0 ; i
< nb_tracefile
; i
++) {
385 tfc
= &g_array_index(self
->tracefiles
, LttvTracefileContext
*, i
);
386 lttv_tracefile_context_remove_hooks(*tfc
,
392 lttv_hooks_call(after_trace
, self
);
395 void lttv_tracefile_context_add_hooks(LttvTracefileContext
*self
,
396 LttvHooks
*before_tracefile
,
398 LttvHooksById
*event_by_id
)
404 lttv_hooks_call(before_tracefile
, self
);
405 lttv_hooks_add_list(self
->event
, event
);
406 if(event_by_id
!= NULL
) {
407 for(i
= 0; i
< event_by_id
->array
->len
; i
++) {
408 index
= g_array_index(event_by_id
->array
, guint
, i
);
409 hook
= lttv_hooks_by_id_find(self
->event_by_id
, index
);
410 lttv_hooks_add_list(hook
, lttv_hooks_by_id_get(event_by_id
, index
));
415 void lttv_tracefile_context_remove_hooks(LttvTracefileContext
*self
,
416 LttvHooks
*after_tracefile
,
418 LttvHooksById
*event_by_id
)
424 lttv_hooks_remove_list(self
->event
, event
);
425 if(event_by_id
!= NULL
) {
426 for(i
= 0; i
< event_by_id
->array
->len
; i
++) {
427 index
= g_array_index(event_by_id
->array
, guint
, i
);
428 hook
= lttv_hooks_by_id_get(self
->event_by_id
, index
);
430 lttv_hooks_remove_list(hook
, lttv_hooks_by_id_get(event_by_id
, index
));
434 lttv_hooks_call(after_tracefile
, self
);
439 void lttv_tracefile_context_add_hooks_by_id(LttvTracefileContext
*tfc
,
441 LttvHooks
*event_by_id
)
444 h
= lttv_hooks_by_id_find(tfc
->event_by_id
, i
);
445 lttv_hooks_add_list(h
, event_by_id
);
448 void lttv_tracefile_context_remove_hooks_by_id(LttvTracefileContext
*tfc
,
451 lttv_hooks_by_id_remove(tfc
->event_by_id
, i
);
454 static LttvTracesetContext
*
455 new_traceset_context(LttvTracesetContext
*self
)
457 return g_object_new(LTTV_TRACESET_CONTEXT_TYPE
, NULL
);
461 static LttvTraceContext
*
462 new_trace_context(LttvTracesetContext
*self
)
464 return g_object_new(LTTV_TRACE_CONTEXT_TYPE
, NULL
);
468 static LttvTracefileContext
*
469 new_tracefile_context(LttvTracesetContext
*self
)
471 return g_object_new(LTTV_TRACEFILE_CONTEXT_TYPE
, NULL
);
476 traceset_context_instance_init (GTypeInstance
*instance
, gpointer g_class
)
478 /* Be careful of anything which would not work well with shallow copies */
483 traceset_context_finalize (LttvTracesetContext
*self
)
485 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACESET_CONTEXT_TYPE
)))
486 ->finalize(G_OBJECT(self
));
491 traceset_context_class_init (LttvTracesetContextClass
*klass
)
493 GObjectClass
*gobject_class
= G_OBJECT_CLASS(klass
);
495 gobject_class
->finalize
= (void (*)(GObject
*self
))traceset_context_finalize
;
498 klass
->new_traceset_context
= new_traceset_context
;
499 klass
->new_trace_context
= new_trace_context
;
500 klass
->new_tracefile_context
= new_tracefile_context
;
505 lttv_traceset_context_get_type(void)
507 static GType type
= 0;
509 static const GTypeInfo info
= {
510 sizeof (LttvTracesetContextClass
),
511 NULL
, /* base_init */
512 NULL
, /* base_finalize */
513 (GClassInitFunc
) traceset_context_class_init
, /* class_init */
514 NULL
, /* class_finalize */
515 NULL
, /* class_data */
516 sizeof (LttvTracesetContext
),
518 (GInstanceInitFunc
) traceset_context_instance_init
, /* instance_init */
519 NULL
/* Value handling */
522 type
= g_type_register_static (G_TYPE_OBJECT
, "LttvTracesetContextType",
530 trace_context_instance_init (GTypeInstance
*instance
, gpointer g_class
)
532 /* Be careful of anything which would not work well with shallow copies */
537 trace_context_finalize (LttvTraceContext
*self
)
539 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACE_CONTEXT_TYPE
)))->
540 finalize(G_OBJECT(self
));
545 trace_context_class_init (LttvTraceContextClass
*klass
)
547 GObjectClass
*gobject_class
= G_OBJECT_CLASS(klass
);
549 gobject_class
->finalize
= (void (*)(GObject
*self
)) trace_context_finalize
;
554 lttv_trace_context_get_type(void)
556 static GType type
= 0;
558 static const GTypeInfo info
= {
559 sizeof (LttvTraceContextClass
),
560 NULL
, /* base_init */
561 NULL
, /* base_finalize */
562 (GClassInitFunc
) trace_context_class_init
, /* class_init */
563 NULL
, /* class_finalize */
564 NULL
, /* class_data */
565 sizeof (LttvTraceContext
),
567 (GInstanceInitFunc
) trace_context_instance_init
, /* instance_init */
568 NULL
/* Value handling */
571 type
= g_type_register_static (G_TYPE_OBJECT
, "LttvTraceContextType",
579 tracefile_context_instance_init (GTypeInstance
*instance
, gpointer g_class
)
581 /* Be careful of anything which would not work well with shallow copies */
586 tracefile_context_finalize (LttvTracefileContext
*self
)
588 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACEFILE_CONTEXT_TYPE
)))
589 ->finalize(G_OBJECT(self
));
594 tracefile_context_class_init (LttvTracefileContextClass
*klass
)
596 GObjectClass
*gobject_class
= G_OBJECT_CLASS(klass
);
598 gobject_class
->finalize
= (void (*)(GObject
*self
))tracefile_context_finalize
;
603 lttv_tracefile_context_get_type(void)
605 static GType type
= 0;
607 static const GTypeInfo info
= {
608 sizeof (LttvTracefileContextClass
),
609 NULL
, /* base_init */
610 NULL
, /* base_finalize */
611 (GClassInitFunc
) tracefile_context_class_init
, /* class_init */
612 NULL
, /* class_finalize */
613 NULL
, /* class_data */
614 sizeof (LttvTracefileContext
),
616 (GInstanceInitFunc
) tracefile_context_instance_init
, /* instance_init */
617 NULL
/* Value handling */
620 type
= g_type_register_static (G_TYPE_OBJECT
, "LttvTracefileContextType",
628 static gboolean
get_first(gpointer key
, gpointer value
, gpointer user_data
) {
629 g_assert(key
== value
);
630 *((LttvTracefileContext
**)user_data
) = (LttvTracefileContext
*)value
;
635 // Test to see if pqueue is traversed in the right order.
636 static LttTime test_time
;
638 static gboolean
test_tree(gpointer key
, gpointer value
, gpointer user_data
) {
640 LttvTracefileContext
*tfc
= (LttvTracefileContext
*)key
;
642 g_debug("Tracefile name %s, time %lu.%lu, tfi %u, ti %u",
643 g_quark_to_string(ltt_tracefile_name(tfc
->tf
)),
644 tfc
->timestamp
.tv_sec
, tfc
->timestamp
.tv_nsec
,
645 tfc
->index
, tfc
->t_context
->index
);
647 if(user_data
!= NULL
) {
648 if(((LttvTracefileContext
*)user_data
) == (LttvTracefileContext
*)value
) {
649 g_assert(compare_tracefile(user_data
, value
) == 0);
651 g_assert(compare_tracefile(user_data
, value
) != 0);
653 g_assert(ltt_time_compare(test_time
, tfc
->timestamp
) <= 0);
654 test_time
.tv_sec
= tfc
->timestamp
.tv_sec
;
655 test_time
.tv_nsec
= tfc
->timestamp
.tv_nsec
;
658 //g_assert(((LttvTracefileContext *)user_data) != (LttvTracefileContext *)value);
665 void lttv_process_traceset_begin(LttvTracesetContext
*self
,
666 LttvHooks
*before_traceset
,
667 LttvHooks
*before_trace
,
668 LttvHooks
*before_tracefile
,
670 LttvHooksById
*event_by_id
)
673 /* simply add hooks in context. _before hooks are called by add_hooks. */
674 /* It calls all before_traceset, before_trace, and before_tracefile hooks. */
675 lttv_traceset_context_add_hooks(self
,
684 //enum read_state { LAST_NONE, LAST_OK, LAST_EMPTY };
686 /* Note : a _middle must be preceded from a _seek or another middle */
687 guint
lttv_process_traceset_middle(LttvTracesetContext
*self
,
690 const LttvTracesetContextPosition
*end_position
)
692 GTree
*pqueue
= self
->pqueue
;
694 LttvTracefileContext
*tfc
;
702 //enum read_state last_read_state = LAST_NONE;
704 gint last_ret
= 0; /* return value of the last hook list called */
706 /* Get the next event from the pqueue, call its hooks,
707 reinsert in the pqueue the following event from the same tracefile
708 unless the tracefile is finished or the event is later than the
713 g_tree_foreach(pqueue
, get_first
, &tfc
);
714 /* End of traceset : tfc is NULL */
715 if(unlikely(tfc
== NULL
))
721 * - the maximum number of events specified?
722 * - the end position ?
724 * then the read is finished. We leave the queue in the same state and
728 if(unlikely(last_ret
== TRUE
||
729 ((count
>= nb_events
) && (nb_events
!= G_MAXULONG
)) ||
730 (end_position
!=NULL
&<tv_traceset_context_ctx_pos_compare(self
,
731 end_position
) == 0)||
732 ltt_time_compare(end
, tfc
->timestamp
) <= 0))
737 /* Get the tracefile with an event for the smallest time found. If two
738 or more tracefiles have events for the same time, hope that lookup
739 and remove are consistent. */
742 test_time
.tv_sec
= 0;
743 test_time
.tv_nsec
= 0;
744 g_debug("test tree before remove");
745 g_tree_foreach(pqueue
, test_tree
, tfc
);
747 g_tree_remove(pqueue
, tfc
);
750 test_time
.tv_sec
= 0;
751 test_time
.tv_nsec
= 0;
752 g_debug("test tree after remove");
753 g_tree_foreach(pqueue
, test_tree
, tfc
);
757 e
= ltt_tracefile_get_event(tfc
->tf
);
759 //if(last_read_state != LAST_EMPTY) {
760 /* Only call hooks if the last read has given an event or if we are at the
761 * first pass (not if last read returned end of tracefile) */
764 tfc
->target_pid
= -1; /* unset target PID */
766 * return values : 0 : continue read, 1 : go to next position and stop read,
767 * 2 : stay at the current position and stop read */
768 last_ret
= lttv_hooks_call_merge(tfc
->event
, tfc
,
769 lttv_hooks_by_id_get(tfc
->event_by_id
, e
->event_id
), tfc
);
772 /* This is buggy : it won't work well with state computation */
773 if(unlikely(last_ret
== 2)) {
774 /* This is a case where we want to stay at this position and stop read. */
775 g_tree_insert(pqueue
, tfc
, tfc
);
779 read_ret
= ltt_tracefile_read(tfc
->tf
);
782 if(likely(!read_ret
)) {
783 //g_debug("An event is ready");
784 tfc
->timestamp
= ltt_event_time(e
);
785 g_assert(ltt_time_compare(tfc
->timestamp
, ltt_time_infinite
) != 0);
786 g_tree_insert(pqueue
, tfc
, tfc
);
788 test_time
.tv_sec
= 0;
789 test_time
.tv_nsec
= 0;
790 g_debug("test tree after event ready");
791 g_tree_foreach(pqueue
, test_tree
, NULL
);
794 //last_read_state = LAST_OK;
796 tfc
->timestamp
= ltt_time_infinite
;
798 if(read_ret
== ERANGE
) {
799 // last_read_state = LAST_EMPTY;
800 g_debug("End of trace");
802 g_error("Error happened in lttv_process_traceset_middle");
808 void lttv_process_traceset_end(LttvTracesetContext
*self
,
809 LttvHooks
*after_traceset
,
810 LttvHooks
*after_trace
,
811 LttvHooks
*after_tracefile
,
813 LttvHooksById
*event_by_id
)
815 /* Remove hooks from context. _after hooks are called by remove_hooks. */
816 /* It calls all after_traceset, after_trace, and after_tracefile hooks. */
817 lttv_traceset_context_remove_hooks(self
,
825 /* Subtile modification :
826 * if tracefile has no event at or after the time requested, it is not put in
827 * the queue, as the next read would fail.
829 * Don't forget to empty the traceset pqueue before calling this.
831 void lttv_process_trace_seek_time(LttvTraceContext
*self
, LttTime start
)
833 guint i
, nb_tracefile
;
837 LttvTracefileContext
**tfc
;
839 nb_tracefile
= self
->tracefiles
->len
;
841 GTree
*pqueue
= self
->ts_context
->pqueue
;
843 for(i
= 0 ; i
< nb_tracefile
; i
++) {
844 tfc
= &g_array_index(self
->tracefiles
, LttvTracefileContext
*, i
);
846 g_tree_remove(pqueue
, *tfc
);
848 ret
= ltt_tracefile_seek_time((*tfc
)->tf
, start
);
849 if(ret
== EPERM
) g_error("error in lttv_process_trace_seek_time seek");
851 if(ret
== 0) { /* not ERANGE especially */
852 (*tfc
)->timestamp
= ltt_event_time(ltt_tracefile_get_event((*tfc
)->tf
));
853 g_assert(ltt_time_compare((*tfc
)->timestamp
, ltt_time_infinite
) != 0);
854 g_tree_insert(pqueue
, (*tfc
), (*tfc
));
856 (*tfc
)->timestamp
= ltt_time_infinite
;
860 test_time
.tv_sec
= 0;
861 test_time
.tv_nsec
= 0;
862 g_debug("test tree after seek_time");
863 g_tree_foreach(pqueue
, test_tree
, NULL
);
871 void lttv_process_traceset_seek_time(LttvTracesetContext
*self
, LttTime start
)
875 LttvTraceContext
*tc
;
877 //g_tree_destroy(self->pqueue);
878 //self->pqueue = g_tree_new(compare_tracefile);
880 nb_trace
= lttv_traceset_number(self
->ts
);
881 for(i
= 0 ; i
< nb_trace
; i
++) {
882 tc
= self
->traces
[i
];
883 lttv_process_trace_seek_time(tc
, start
);
888 gboolean
lttv_process_traceset_seek_position(LttvTracesetContext
*self
,
889 const LttvTracesetContextPosition
*pos
)
892 /* If a position is set, seek the traceset to this position */
893 if(ltt_time_compare(pos
->timestamp
, ltt_time_infinite
) != 0) {
895 /* Test to see if the traces has been added to the trace set :
896 * It should NEVER happen. Clear all positions if a new trace comes in. */
897 /* FIXME I know this test is not optimal : should keep a number of
898 * tracefiles variable in the traceset.. eventually */
899 guint num_traces
= lttv_traceset_number(self
->ts
);
901 for(i
=0; i
<num_traces
;i
++) {
902 GArray
* tracefiles
= self
->traces
[i
]->tracefiles
;
904 guint num_tracefiles
= tracefiles
->len
;
905 for(j
=0;j
<num_tracefiles
;j
++)
908 g_assert(tf_count
== pos
->tfcp
->len
);
911 //g_tree_destroy(self->pqueue);
912 //self->pqueue = g_tree_new(compare_tracefile);
914 for(i
=0;i
<pos
->tfcp
->len
; i
++) {
915 LttvTracefileContextPosition
*tfcp
=
916 &g_array_index(pos
->tfcp
, LttvTracefileContextPosition
, i
);
918 g_tree_remove(self
->pqueue
, tfcp
->tfc
);
920 if(tfcp
->used
== TRUE
) {
921 if(ltt_tracefile_seek_position(tfcp
->tfc
->tf
, tfcp
->event
) != 0)
923 tfcp
->tfc
->timestamp
=
924 ltt_event_time(ltt_tracefile_get_event(tfcp
->tfc
->tf
));
925 g_assert(ltt_time_compare(tfcp
->tfc
->timestamp
,
926 ltt_time_infinite
) != 0);
927 g_tree_insert(self
->pqueue
, tfcp
->tfc
, tfcp
->tfc
);
930 tfcp
->tfc
->timestamp
= ltt_time_infinite
;
935 test_time
.tv_sec
= 0;
936 test_time
.tv_nsec
= 0;
937 g_debug("test tree after seek_position");
938 g_tree_foreach(self
->pqueue
, test_tree
, NULL
);
947 #if 0 // pmf: temporary disable
949 find_field(LttEventType
*et
, const GQuark field
)
953 if(field
== 0) return NULL
;
955 f
= ltt_eventtype_field_by_name(et
, field
);
957 g_warning("Cannot find field %s in event %s.%s", g_quark_to_string(field
),
958 g_quark_to_string(ltt_facility_name(ltt_eventtype_facility(et
))),
959 g_quark_to_string(ltt_eventtype_name(et
)));
966 struct marker_info
*lttv_trace_hook_get_marker(LttTrace
*t
, LttvTraceHook
*th
)
968 return marker_get_info_from_id(t
, th
->id
);
972 GArray
*lttv_trace_find_hook(LttTrace
*t
, GQuark marker_name
,
973 GQuark fields
[], LttvHook h
, gpointer hook_data
)
975 struct marker_info
*info
;
977 struct marker_field
*field
;
982 info
= marker_get_info_from_name(t
, marker_name
);
983 if(unlikely(info
== NULL
)) {
987 retval
= g_array_new(FALSE
, FALSE
, sizeof(LttvTraceHook
));
991 /* for each marker with the requested name */
996 marker_id
= marker_get_id_from_info(t
, info
);
999 tmpth
.id
= marker_id
;
1000 tmpth
.hook_data
= hook_data
;
1001 tmpth
.fields
= g_ptr_array_new();
1003 /* for each field requested */
1005 for(pfieldname
= fields
; pfieldname
!= NULL
; pfieldname
++) {
1006 for_each_marker_field(field
, info
) {
1007 if(field
->name
== *pfieldname
) {
1010 g_ptr_array_add(tmpth
.fields
, field
);
1015 /* Did not find the one of the fields in this instance of the
1017 g_ptr_array_free(tmpth
.fields
, TRUE
);
1022 /* all fields were found: add the tracehook to the array */
1023 g_array_append_val(retval
, tmpth
);
1026 } while(info
!= NULL
);
1033 g_array_free(retval
, TRUE
);
1037 void lttv_trace_hook_destroy(GArray
*th
)
1040 for(i
=0; i
<th
->len
; i
++) {
1041 g_ptr_array_free(g_array_index(th
, LttvTraceHook
, i
).fields
, TRUE
);
1044 g_array_free(th
, TRUE
);
1050 LttvTracesetContextPosition
*lttv_traceset_context_position_new(
1051 const LttvTracesetContext
*self
)
1053 guint num_traces
= lttv_traceset_number(self
->ts
);
1057 for(i
=0; i
<num_traces
;i
++) {
1058 GArray
* tracefiles
= self
->traces
[i
]->tracefiles
;
1060 guint num_tracefiles
= tracefiles
->len
;
1061 for(j
=0;j
<num_tracefiles
;j
++)
1064 LttvTracesetContextPosition
*pos
=
1065 g_new(LttvTracesetContextPosition
, 1);
1066 pos
->tfcp
= g_array_sized_new(FALSE
, TRUE
,
1067 sizeof(LttvTracefileContextPosition
),
1069 g_array_set_size(pos
->tfcp
, tf_count
);
1070 for(i
=0;i
<pos
->tfcp
->len
;i
++) {
1071 LttvTracefileContextPosition
*tfcp
=
1072 &g_array_index(pos
->tfcp
, LttvTracefileContextPosition
, i
);
1073 tfcp
->event
= ltt_event_position_new();
1076 pos
->timestamp
= ltt_time_infinite
;
1080 /* Save all positions, the ones with infinite time will have NULL
1082 /* note : a position must be destroyed when a trace is added/removed from a
1084 void lttv_traceset_context_position_save(const LttvTracesetContext
*self
,
1085 LttvTracesetContextPosition
*pos
)
1088 guint num_traces
= lttv_traceset_number(self
->ts
);
1091 pos
->timestamp
= ltt_time_infinite
;
1093 for(i
=0; i
<num_traces
;i
++) {
1094 GArray
* tracefiles
= self
->traces
[i
]->tracefiles
;
1096 guint num_tracefiles
= tracefiles
->len
;
1098 for(j
=0;j
<num_tracefiles
;j
++) {
1099 g_assert(tf_count
< pos
->tfcp
->len
);
1100 LttvTracefileContext
**tfc
= &g_array_index(tracefiles
,
1101 LttvTracefileContext
*, j
);
1102 LttvTracefileContextPosition
*tfcp
=
1103 &g_array_index(pos
->tfcp
, LttvTracefileContextPosition
, tf_count
);
1107 if(ltt_time_compare((*tfc
)->timestamp
, ltt_time_infinite
) != 0) {
1108 LttEvent
*event
= ltt_tracefile_get_event((*tfc
)->tf
);
1109 ltt_event_position(event
, tfcp
->event
);
1110 if(ltt_time_compare((*tfc
)->timestamp
, pos
->timestamp
) < 0)
1111 pos
->timestamp
= (*tfc
)->timestamp
;
1117 //g_array_append_val(pos->tfc, *tfc);
1118 //g_array_append_val(pos->ep, ep);
1125 void lttv_traceset_context_position_destroy(LttvTracesetContextPosition
*pos
)
1129 for(i
=0;i
<pos
->tfcp
->len
;i
++) {
1130 LttvTracefileContextPosition
*tfcp
=
1131 &g_array_index(pos
->tfcp
, LttvTracefileContextPosition
, i
);
1132 g_free(tfcp
->event
);
1136 g_array_free(pos
->tfcp
, TRUE
);
1140 void lttv_traceset_context_position_copy(LttvTracesetContextPosition
*dest
,
1141 const LttvTracesetContextPosition
*src
)
1144 LttvTracefileContextPosition
*src_tfcp
, *dest_tfcp
;
1146 g_assert(src
->tfcp
->len
== src
->tfcp
->len
);
1148 for(i
=0;i
<src
->tfcp
->len
;i
++) {
1150 &g_array_index(src
->tfcp
, LttvTracefileContextPosition
, i
);
1152 &g_array_index(dest
->tfcp
, LttvTracefileContextPosition
, i
);
1154 dest_tfcp
->used
= src_tfcp
->used
;
1155 dest_tfcp
->tfc
= src_tfcp
->tfc
;
1157 if(src_tfcp
->used
) {
1158 ltt_event_position_copy(
1163 dest
->timestamp
= src
->timestamp
;
1166 gint
lttv_traceset_context_ctx_pos_compare(const LttvTracesetContext
*self
,
1167 const LttvTracesetContextPosition
*pos
)
1172 if(pos
->tfcp
->len
== 0) {
1173 if(lttv_traceset_number(self
->ts
) == 0) return 0;
1176 if(lttv_traceset_number(self
->ts
) == 0)
1179 for(i
=0;i
<pos
->tfcp
->len
;i
++) {
1180 LttvTracefileContextPosition
*tfcp
=
1181 &g_array_index(pos
->tfcp
, LttvTracefileContextPosition
, i
);
1183 if(tfcp
->used
== FALSE
) {
1184 if(ltt_time_compare(tfcp
->tfc
->timestamp
, ltt_time_infinite
) < 0) {
1188 if(ltt_time_compare(tfcp
->tfc
->timestamp
, ltt_time_infinite
) == 0) {
1191 LttEvent
*event
= ltt_tracefile_get_event(tfcp
->tfc
->tf
);
1193 ret
= ltt_event_position_compare((LttEventPosition
*)event
,
1197 if(ret
!= 0) return ret
;
1204 gint
lttv_traceset_context_pos_pos_compare(
1205 const LttvTracesetContextPosition
*pos1
,
1206 const LttvTracesetContextPosition
*pos2
)
1211 if(ltt_time_compare(pos1
->timestamp
, ltt_time_infinite
) == 0) {
1212 if(ltt_time_compare(pos2
->timestamp
, ltt_time_infinite
) == 0)
1217 if(ltt_time_compare(pos2
->timestamp
, ltt_time_infinite
) == 0)
1220 for(i
=0;i
<pos1
->tfcp
->len
;i
++) {
1221 LttvTracefileContextPosition
*tfcp1
=
1222 &g_array_index(pos1
->tfcp
, LttvTracefileContextPosition
, i
);
1224 if(tfcp1
->used
== TRUE
) {
1225 for(j
=0;j
<pos2
->tfcp
->len
;j
++) {
1226 LttvTracefileContextPosition
*tfcp2
=
1227 &g_array_index(pos2
->tfcp
, LttvTracefileContextPosition
, j
);
1229 if(tfcp1
->tfc
== tfcp2
->tfc
) {
1230 if(tfcp2
->used
== TRUE
)
1231 ret
= ltt_event_position_compare(tfcp1
->event
, tfcp2
->event
);
1235 if(ret
!= 0) return ret
;
1240 for(j
=0;j
<pos2
->tfcp
->len
;j
++) {
1241 LttvTracefileContextPosition
*tfcp2
=
1242 &g_array_index(pos2
->tfcp
, LttvTracefileContextPosition
, j
);
1244 if(tfcp1
->tfc
== tfcp2
->tfc
)
1245 if(tfcp2
->used
== TRUE
) ret
= 1;
1246 if(ret
!= 0) return ret
;
1254 LttTime
lttv_traceset_context_position_get_time(
1255 const LttvTracesetContextPosition
*pos
)
1257 return pos
->timestamp
;
1261 LttvTracefileContext
*lttv_traceset_context_get_current_tfc(LttvTracesetContext
*self
)
1263 GTree
*pqueue
= self
->pqueue
;
1264 LttvTracefileContext
*tfc
= NULL
;
1266 g_tree_foreach(pqueue
, get_first
, &tfc
);
1271 /* lttv_process_traceset_synchronize_tracefiles
1273 * Use the sync_position field of the trace set context to synchronize each
1274 * tracefile with the previously saved position.
1276 * If no previous position has been saved, it simply does nothing.
1278 void lttv_process_traceset_synchronize_tracefiles(LttvTracesetContext
*tsc
)
1280 g_assert(lttv_process_traceset_seek_position(tsc
, tsc
->sync_position
) == 0);
1286 void lttv_process_traceset_get_sync_data(LttvTracesetContext
*tsc
)
1288 lttv_traceset_context_position_save(tsc
, tsc
->sync_position
);
1291 struct seek_back_data
{
1292 guint first_event
; /* Index of the first event in the array : we will always
1293 overwrite at this position : this is a circular array.
1296 guint n
; /* number of events requested */
1297 GPtrArray
*array
; /* array of LttvTracesetContextPositions pointers */
1298 LttvFilter
*filter1
;
1299 LttvFilter
*filter2
;
1300 LttvFilter
*filter3
;
1302 check_handler
*check
;
1303 gboolean
*stop_flag
;
1304 guint raw_event_count
;
1307 static gint
seek_back_event_hook(void *hook_data
, void* call_data
)
1309 struct seek_back_data
*sd
= (struct seek_back_data
*)hook_data
;
1310 LttvTracefileContext
*tfc
= (LttvTracefileContext
*)call_data
;
1311 LttvTracesetContext
*tsc
= tfc
->t_context
->ts_context
;
1312 LttvTracesetContextPosition
*pos
;
1314 if(sd
->check
&& sd
->check(sd
->raw_event_count
, sd
->stop_flag
, sd
->data
))
1316 sd
->raw_event_count
++;
1318 if(sd
->filter1
!= NULL
&& sd
->filter1
->head
!= NULL
&&
1319 !lttv_filter_tree_parse(sd
->filter1
->head
,
1320 ltt_tracefile_get_event(tfc
->tf
),
1326 if(sd
->filter2
!= NULL
&& sd
->filter2
->head
!= NULL
&&
1327 !lttv_filter_tree_parse(sd
->filter2
->head
,
1328 ltt_tracefile_get_event(tfc
->tf
),
1334 if(sd
->filter3
!= NULL
&& sd
->filter3
->head
!= NULL
&&
1335 !lttv_filter_tree_parse(sd
->filter3
->head
,
1336 ltt_tracefile_get_event(tfc
->tf
),
1343 pos
= (LttvTracesetContextPosition
*)g_ptr_array_index (sd
->array
,
1346 lttv_traceset_context_position_save(tsc
, pos
);
1348 if(sd
->first_event
>= sd
->array
->len
- 1) sd
->first_event
= 0;
1349 else sd
->first_event
++;
1351 sd
->events_found
= min(sd
->n
, sd
->events_found
+ 1);
1356 /* Seek back n events back from the current position.
1359 * @self The trace set context
1360 * @n number of events to jump over
1361 * @first_offset The initial offset value used.
1362 * never put first_offset at ltt_time_zero.
1363 * @time_seeker Function pointer of the function to use to seek time :
1364 * either lttv_process_traceset_seek_time
1365 * or lttv_state_traceset_seek_time_closest
1366 * @filter The filter to call.
1368 * Return value : the number of events found (might be lower than the number
1369 * requested if beginning of traceset is reached).
1371 * The first search will go back first_offset and try to find the last n events
1372 * matching the filter. If there are not enough, it will try to go back from the
1373 * new trace point from first_offset*2, and so on, until beginning of trace or n
1376 * Note : this function does not take in account the LttvFilter : use the
1377 * similar function found in state.c instead.
1379 * Note2 : the caller must make sure that the LttvTracesetContext does not
1380 * contain any hook, as process_traceset_middle is used in this routine.
1382 guint
lttv_process_traceset_seek_n_backward(LttvTracesetContext
*self
,
1383 guint n
, LttTime first_offset
,
1384 seek_time_fct time_seeker
,
1385 check_handler
*check
,
1386 gboolean
*stop_flag
,
1387 LttvFilter
*filter1
,
1388 LttvFilter
*filter2
,
1389 LttvFilter
*filter3
,
1392 if(lttv_traceset_number(self
->ts
) == 0) return 0;
1393 g_assert(ltt_time_compare(first_offset
, ltt_time_zero
) != 0);
1396 LttvTracesetContextPosition
*next_iter_end_pos
=
1397 lttv_traceset_context_position_new(self
);
1398 LttvTracesetContextPosition
*end_pos
=
1399 lttv_traceset_context_position_new(self
);
1400 LttvTracesetContextPosition
*saved_pos
=
1401 lttv_traceset_context_position_new(self
);
1404 LttTime time_offset
;
1405 struct seek_back_data sd
;
1406 LttvHooks
*hooks
= lttv_hooks_new();
1409 sd
.events_found
= 0;
1410 sd
.array
= g_ptr_array_sized_new(n
);
1411 sd
.filter1
= filter1
;
1412 sd
.filter2
= filter2
;
1413 sd
.filter3
= filter3
;
1417 sd
.stop_flag
= stop_flag
;
1418 sd
.raw_event_count
= 0;
1419 g_ptr_array_set_size(sd
.array
, n
);
1421 g_ptr_array_index (sd
.array
, i
) = lttv_traceset_context_position_new(self
);
1424 lttv_traceset_context_position_save(self
, next_iter_end_pos
);
1425 lttv_traceset_context_position_save(self
, saved_pos
);
1426 /* Get the current time from which we will offset */
1427 time
= lttv_traceset_context_position_get_time(next_iter_end_pos
);
1428 /* the position saved might be end of traceset... */
1429 if(ltt_time_compare(time
, self
->time_span
.end_time
) > 0) {
1430 time
= self
->time_span
.end_time
;
1433 time_offset
= first_offset
;
1435 lttv_hooks_add(hooks
, seek_back_event_hook
, &sd
, LTTV_PRIO_DEFAULT
);
1437 lttv_process_traceset_begin(self
, NULL
, NULL
, NULL
, hooks
, NULL
);
1440 /* stop criteria : - n events found
1441 * - asked_time < beginning of trace */
1442 if(ltt_time_compare(asked_time
, self
->time_span
.start_time
) < 0) break;
1444 lttv_traceset_context_position_copy(end_pos
, next_iter_end_pos
);
1446 /* We must seek the traceset back to time - time_offset */
1447 /* this time becomes the new reference time */
1448 time
= ltt_time_sub(time
, time_offset
);
1451 time_seeker(self
, time
);
1452 lttv_traceset_context_position_save(self
, next_iter_end_pos
);
1453 /* Resync the time in case of a seek_closest */
1454 time
= lttv_traceset_context_position_get_time(next_iter_end_pos
);
1455 if(ltt_time_compare(time
, self
->time_span
.end_time
) > 0) {
1456 time
= self
->time_span
.end_time
;
1459 /* Process the traceset, calling a hook which adds events
1460 * to the array, overwriting the tail. It changes first_event and
1461 * events_found too. */
1462 /* We would like to have a clean context here : no other hook than our's */
1464 lttv_process_traceset_middle(self
, ltt_time_infinite
,
1465 G_MAXUINT
, end_pos
);
1467 if(sd
.events_found
< n
) {
1468 if(sd
.first_event
> 0) {
1469 /* Save the first position */
1470 LttvTracesetContextPosition
*pos
=
1471 (LttvTracesetContextPosition
*)g_ptr_array_index (sd
.array
, 0);
1472 lttv_traceset_context_position_copy(saved_pos
, pos
);
1474 g_assert(n
-sd
.events_found
<= sd
.array
->len
);
1475 /* Change array size to n - events_found */
1476 for(i
=n
-sd
.events_found
;i
<sd
.array
->len
;i
++) {
1477 LttvTracesetContextPosition
*pos
=
1478 (LttvTracesetContextPosition
*)g_ptr_array_index (sd
.array
, i
);
1479 lttv_traceset_context_position_destroy(pos
);
1481 g_ptr_array_set_size(sd
.array
, n
-sd
.events_found
);
1484 } else break; /* Second end criterion : n events found */
1486 time_offset
= ltt_time_mul(time_offset
, BACKWARD_SEEK_MUL
);
1489 lttv_traceset_context_position_destroy(end_pos
);
1490 lttv_traceset_context_position_destroy(next_iter_end_pos
);
1492 lttv_process_traceset_end(self
, NULL
, NULL
, NULL
, hooks
, NULL
);
1494 if(sd
.events_found
>= n
) {
1495 /* Seek the traceset to the first event in the circular array */
1496 LttvTracesetContextPosition
*pos
=
1497 (LttvTracesetContextPosition
*)g_ptr_array_index (sd
.array
,
1499 g_assert(lttv_process_traceset_seek_position(self
, pos
) == 0);
1501 /* Will seek to the last saved position : in the worst case, it will be the
1502 * original position (if events_found is 0) */
1503 g_assert(lttv_process_traceset_seek_position(self
, saved_pos
) == 0);
1506 for(i
=0;i
<sd
.array
->len
;i
++) {
1507 LttvTracesetContextPosition
*pos
=
1508 (LttvTracesetContextPosition
*)g_ptr_array_index (sd
.array
, i
);
1509 lttv_traceset_context_position_destroy(pos
);
1511 g_ptr_array_free(sd
.array
, TRUE
);
1513 lttv_hooks_destroy(hooks
);
1515 lttv_traceset_context_position_destroy(saved_pos
);
1517 return sd
.events_found
;
1521 struct seek_forward_data
{
1522 guint event_count
; /* event counter */
1523 guint n
; /* requested number of events to jump over */
1524 LttvFilter
*filter1
;
1525 LttvFilter
*filter2
;
1526 LttvFilter
*filter3
;
1528 check_handler
*check
;
1529 gboolean
*stop_flag
;
1530 guint raw_event_count
; /* event counter */
1533 static gint
seek_forward_event_hook(void *hook_data
, void* call_data
)
1535 struct seek_forward_data
*sd
= (struct seek_forward_data
*)hook_data
;
1536 LttvTracefileContext
*tfc
= (LttvTracefileContext
*)call_data
;
1538 if(sd
->check
&& sd
->check(sd
->raw_event_count
, sd
->stop_flag
, sd
->data
))
1540 sd
->raw_event_count
++;
1542 if(sd
->filter1
!= NULL
&& sd
->filter1
->head
!= NULL
&&
1543 !lttv_filter_tree_parse(sd
->filter1
->head
,
1544 ltt_tracefile_get_event(tfc
->tf
),
1550 if(sd
->filter2
!= NULL
&& sd
->filter2
->head
!= NULL
&&
1551 !lttv_filter_tree_parse(sd
->filter2
->head
,
1552 ltt_tracefile_get_event(tfc
->tf
),
1558 if(sd
->filter3
!= NULL
&& sd
->filter3
->head
!= NULL
&&
1559 !lttv_filter_tree_parse(sd
->filter3
->head
,
1560 ltt_tracefile_get_event(tfc
->tf
),
1568 if(sd
->event_count
>= sd
->n
)
1572 /* Seek back n events forward from the current position (1 to n)
1573 * 0 is ok too, but it will actually do nothing.
1576 * @self the trace set context
1577 * @n number of events to jump over
1578 * @filter filter to call.
1580 * returns : the number of events jumped over (may be less than requested if end
1581 * of traceset reached) */
1582 guint
lttv_process_traceset_seek_n_forward(LttvTracesetContext
*self
,
1584 check_handler
*check
,
1585 gboolean
*stop_flag
,
1586 LttvFilter
*filter1
,
1587 LttvFilter
*filter2
,
1588 LttvFilter
*filter3
,
1591 struct seek_forward_data sd
;
1594 sd
.filter1
= filter1
;
1595 sd
.filter2
= filter2
;
1596 sd
.filter3
= filter3
;
1599 sd
.stop_flag
= stop_flag
;
1600 sd
.raw_event_count
= 0;
1602 if(sd
.event_count
>= sd
.n
) return sd
.event_count
;
1604 LttvHooks
*hooks
= lttv_hooks_new();
1606 lttv_hooks_add(hooks
, seek_forward_event_hook
, &sd
, LTTV_PRIO_DEFAULT
);
1608 lttv_process_traceset_begin(self
, NULL
, NULL
, NULL
, hooks
, NULL
);
1610 /* it will end on the end of traceset, or the fact that the
1611 * hook returns TRUE.
1613 lttv_process_traceset_middle(self
, ltt_time_infinite
,
1616 /* Here, our position is either the end of traceset, or the exact position
1617 * after n events : leave it like this. This might be placed on an event that
1618 * will be filtered out, we don't care : all we know is that the following
1619 * event filtered in will be the right one. */
1621 lttv_process_traceset_end(self
, NULL
, NULL
, NULL
, hooks
, NULL
);
1623 lttv_hooks_destroy(hooks
);
1625 return sd
.event_count
;