projects / lttv.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
update compat
[lttv.git] / tags / LinuxTraceToolkitViewer-0.10.0-pre-115102007 / lttv / lttv / tracecontext.c
CommitLineData
0bc7c2cd 1/* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Michel Dagenais
3 *
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;
7 *
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.
12 *
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,
16 * MA 02111-1307, USA.
17 */
18
19#ifdef HAVE_CONFIG_H
20#include <config.h>
21#endif
22
23#include <string.h>
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>
29#include <errno.h>
30
31#define min(a,b) (((a)<(b))?(a):(b))
32
33
34gint compare_tracefile(gconstpointer a, gconstpointer b)
35{
36 gint comparison = 0;
37
38 const LttvTracefileContext *trace_a = (const LttvTracefileContext *)a;
39 const LttvTracefileContext *trace_b = (const LttvTracefileContext *)b;
40
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)
47 comparison = -1;
48 else if(trace_a->t_context->index > trace_b->t_context->index)
49 comparison = 1;
50 }
51 }
52 return comparison;
53}
54
55typedef struct _LttvTracefileContextPosition {
56 LttEventPosition *event;
57 LttvTracefileContext *tfc;
58 gboolean used; /* Tells if the tfc is at end of traceset position */
59} LttvTracefileContextPosition;
60
61
62struct _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) */
68};
69
70void lttv_context_init(LttvTracesetContext *self, LttvTraceset *ts)
71{
72 LTTV_TRACESET_CONTEXT_GET_CLASS(self)->init(self, ts);
73}
74
75
76void lttv_context_fini(LttvTracesetContext *self)
77{
78 LTTV_TRACESET_CONTEXT_GET_CLASS(self)->fini(self);
79}
80
81
82LttvTracesetContext *
83lttv_context_new_traceset_context(LttvTracesetContext *self)
84{
85 return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_traceset_context(self);
86}
87
88
89
90
91LttvTraceContext *
92lttv_context_new_trace_context(LttvTracesetContext *self)
93{
94 return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_trace_context(self);
95}
96
97
98LttvTracefileContext *
99lttv_context_new_tracefile_context(LttvTracesetContext *self)
100{
101 return LTTV_TRACESET_CONTEXT_GET_CLASS(self)->new_tracefile_context(self);
102}
103
104/****************************************************************************
105 * lttv_traceset_context_compute_time_span
106 *
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
111 * critical.
112 *
113 * Author : Xang Xiu Yang
114 ***************************************************************************/
115static void lttv_traceset_context_compute_time_span(
116 LttvTracesetContext *self,
117 TimeInterval *time_span)
118{
119 LttvTraceset * traceset = self->ts;
120 int numTraces = lttv_traceset_number(traceset);
121 int i;
122 LttTime s, e;
123 LttvTraceContext *tc;
124 LttTrace * trace;
125
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;
130
131 for(i=0; i<numTraces;i++){
132 tc = self->traces[i];
133 trace = tc->t;
134
135 ltt_trace_time_span_get(trace, &s, &e);
136 tc->time_span.start_time = s;
137 tc->time_span.end_time = e;
138
139 if(i==0){
140 time_span->start_time = s;
141 time_span->end_time = e;
142 }else{
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;
151 }
152 }
153}
154
155static void init_tracefile_context(LttTracefile *tracefile,
156 LttvTraceContext *tc)
157{
158 LttvTracefileContext *tfc;
159 LttvTracesetContext *tsc = tc->ts_context;
160
161 tfc = LTTV_TRACESET_CONTEXT_GET_CLASS(tsc)->new_tracefile_context(tsc);
162
163 tfc->index = tc->tracefiles->len;
164 tc->tracefiles = g_array_append_val(tc->tracefiles, tfc);
165
166 tfc->tf = tracefile;
167
168 tfc->t_context = tc;
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;
173}
174
175
176static void
177init(LttvTracesetContext *self, LttvTraceset *ts)
178{
179 guint i, nb_trace;
180
181 LttvTraceContext *tc;
182
183 GData **tracefiles_groups;
184
185 struct compute_tracefile_group_args args;
186
187 nb_trace = lttv_traceset_number(ts);
188 self->ts = 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;
195
196 tc->ts_context = self;
197 tc->index = i;
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);
204
205 tracefiles_groups = ltt_trace_get_tracefiles_groups(tc->t);
206 if(tracefiles_groups != NULL) {
207 args.func = (ForEachTraceFileFunc)init_tracefile_context;
208 args.func_args = tc;
209
210 g_datalist_foreach(tracefiles_groups,
211 (GDataForeachFunc)compute_tracefile_group,
212 &args);
213 }
214
215#if 0
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);
220
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;
224 tfc->index = j;
225
226 if(j < nb_control) {
227 tfc->control = TRUE;
228 tfc->tf = ltt_trace_control_tracefile_get(tc->t, j);
229 }
230 else {
231 tfc->control = FALSE;
232 tfc->tf = ltt_trace_per_cpu_tracefile_get(tc->t, j - nb_control);
233 }
234
235 tfc->t_context = tc;
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);
240 }
241#endif //0
242
243 }
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);
248
249}
250
251
252void fini(LttvTracesetContext *self)
253{
254 guint i, j, nb_trace, nb_tracefile;
255
256 LttvTraceContext *tc;
257
258 LttvTracefileContext **tfc;
259
260 LttvTraceset *ts = self->ts;
261
262 g_tree_destroy(self->pqueue);
263 g_object_unref(self->a);
264 lttv_traceset_context_position_destroy(self->sync_position);
265
266 nb_trace = lttv_traceset_number(ts);
267
268 for(i = 0 ; i < nb_trace ; i++) {
269 tc = self->traces[i];
270
271 g_object_unref(tc->a);
272
273 nb_tracefile = tc->tracefiles->len;
274
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);
281 }
282 g_array_free(tc->tracefiles, TRUE);
283 g_object_unref(tc);
284 }
285 g_free(self->traces);
286}
287
288
289void lttv_traceset_context_add_hooks(LttvTracesetContext *self,
290 LttvHooks *before_traceset,
291 LttvHooks *before_trace,
292 LttvHooks *before_tracefile,
293 LttvHooks *event,
294 LttvHooksById *event_by_id)
295{
296 LttvTraceset *ts = self->ts;
297
298 guint i, nb_trace;
299
300 LttvTraceContext *tc;
301
302 lttv_hooks_call(before_traceset, self);
303
304 nb_trace = lttv_traceset_number(ts);
305
306 for(i = 0 ; i < nb_trace ; i++) {
307 tc = self->traces[i];
308 lttv_trace_context_add_hooks(tc,
309 before_trace,
310 before_tracefile,
311 event,
312 event_by_id);
313 }
314}
315
316
317void lttv_traceset_context_remove_hooks(LttvTracesetContext *self,
318 LttvHooks *after_traceset,
319 LttvHooks *after_trace,
320 LttvHooks *after_tracefile,
321 LttvHooks *event,
322 LttvHooksById *event_by_id)
323{
324
325 LttvTraceset *ts = self->ts;
326
327 guint i, nb_trace;
328
329 LttvTraceContext *tc;
330
331 nb_trace = lttv_traceset_number(ts);
332
333 for(i = 0 ; i < nb_trace ; i++) {
334 tc = self->traces[i];
335 lttv_trace_context_remove_hooks(tc,
336 after_trace,
337 after_tracefile,
338 event,
339 event_by_id);
340 }
341
342 lttv_hooks_call(after_traceset, self);
343
344
345}
346
347void lttv_trace_context_add_hooks(LttvTraceContext *self,
348 LttvHooks *before_trace,
349 LttvHooks *before_tracefile,
350 LttvHooks *event,
351 LttvHooksById *event_by_id)
352{
353 guint i, nb_tracefile;
354
355 LttvTracefileContext **tfc;
356
357 lttv_hooks_call(before_trace, self);
358
359 nb_tracefile = self->tracefiles->len;
360
361 for(i = 0 ; i < nb_tracefile ; i++) {
362 tfc = &g_array_index(self->tracefiles, LttvTracefileContext*, i);
363 lttv_tracefile_context_add_hooks(*tfc,
364 before_tracefile,
365 event,
366 event_by_id);
367 }
368}
369
370
371
372void lttv_trace_context_remove_hooks(LttvTraceContext *self,
373 LttvHooks *after_trace,
374 LttvHooks *after_tracefile,
375 LttvHooks *event,
376 LttvHooksById *event_by_id)
377{
378 guint i, nb_tracefile;
379
380 LttvTracefileContext **tfc;
381
382 nb_tracefile = self->tracefiles->len;
383
384 for(i = 0 ; i < nb_tracefile ; i++) {
385 tfc = &g_array_index(self->tracefiles, LttvTracefileContext*, i);
386 lttv_tracefile_context_remove_hooks(*tfc,
387 after_tracefile,
388 event,
389 event_by_id);
390 }
391
392 lttv_hooks_call(after_trace, self);
393}
394
395void lttv_tracefile_context_add_hooks(LttvTracefileContext *self,
396 LttvHooks *before_tracefile,
397 LttvHooks *event,
398 LttvHooksById *event_by_id)
399{
400 guint i, index;
401
402 LttvHooks *hook;
403
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));
411 }
412 }
413}
414
415void lttv_tracefile_context_remove_hooks(LttvTracefileContext *self,
416 LttvHooks *after_tracefile,
417 LttvHooks *event,
418 LttvHooksById *event_by_id)
419{
420 guint i, index;
421
422 LttvHooks *hook;
423
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);
429 if(hook != NULL)
430 lttv_hooks_remove_list(hook, lttv_hooks_by_id_get(event_by_id, index));
431 }
432 }
433
434 lttv_hooks_call(after_tracefile, self);
435}
436
437
438
439void lttv_tracefile_context_add_hooks_by_id(LttvTracefileContext *tfc,
440 unsigned i,
441 LttvHooks *event_by_id)
442{
443 LttvHooks * h;
444 h = lttv_hooks_by_id_find(tfc->event_by_id, i);
445 lttv_hooks_add_list(h, event_by_id);
446}
447
448void lttv_tracefile_context_remove_hooks_by_id(LttvTracefileContext *tfc,
449 unsigned i)
450{
451 lttv_hooks_by_id_remove(tfc->event_by_id, i);
452}
453
454static LttvTracesetContext *
455new_traceset_context(LttvTracesetContext *self)
456{
457 return g_object_new(LTTV_TRACESET_CONTEXT_TYPE, NULL);
458}
459
460
461static LttvTraceContext *
462new_trace_context(LttvTracesetContext *self)
463{
464 return g_object_new(LTTV_TRACE_CONTEXT_TYPE, NULL);
465}
466
467
468static LttvTracefileContext *
469new_tracefile_context(LttvTracesetContext *self)
470{
471 return g_object_new(LTTV_TRACEFILE_CONTEXT_TYPE, NULL);
472}
473
474
475static void
476traceset_context_instance_init (GTypeInstance *instance, gpointer g_class)
477{
478 /* Be careful of anything which would not work well with shallow copies */
479}
480
481
482static void
483traceset_context_finalize (LttvTracesetContext *self)
484{
485 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACESET_CONTEXT_TYPE)))
486 ->finalize(G_OBJECT(self));
487}
488
489
490static void
491traceset_context_class_init (LttvTracesetContextClass *klass)
492{
493 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
494
495 gobject_class->finalize = (void (*)(GObject *self))traceset_context_finalize;
496 klass->init = init;
497 klass->fini = fini;
498 klass->new_traceset_context = new_traceset_context;
499 klass->new_trace_context = new_trace_context;
500 klass->new_tracefile_context = new_tracefile_context;
501}
502
503
504GType
505lttv_traceset_context_get_type(void)
506{
507 static GType type = 0;
508 if (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),
517 0, /* n_preallocs */
518 (GInstanceInitFunc) traceset_context_instance_init, /* instance_init */
519 NULL /* Value handling */
520 };
521
522 type = g_type_register_static (G_TYPE_OBJECT, "LttvTracesetContextType",
523 &info, 0);
524 }
525 return type;
526}
527
528
529static void
530trace_context_instance_init (GTypeInstance *instance, gpointer g_class)
531{
532 /* Be careful of anything which would not work well with shallow copies */
533}
534
535
536static void
537trace_context_finalize (LttvTraceContext *self)
538{
539 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACE_CONTEXT_TYPE)))->
540 finalize(G_OBJECT(self));
541}
542
543
544static void
545trace_context_class_init (LttvTraceContextClass *klass)
546{
547 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
548
549 gobject_class->finalize = (void (*)(GObject *self)) trace_context_finalize;
550}
551
552
553GType
554lttv_trace_context_get_type(void)
555{
556 static GType type = 0;
557 if (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),
566 0, /* n_preallocs */
567 (GInstanceInitFunc) trace_context_instance_init, /* instance_init */
568 NULL /* Value handling */
569 };
570
571 type = g_type_register_static (G_TYPE_OBJECT, "LttvTraceContextType",
572 &info, 0);
573 }
574 return type;
575}
576
577
578static void
579tracefile_context_instance_init (GTypeInstance *instance, gpointer g_class)
580{
581 /* Be careful of anything which would not work well with shallow copies */
582}
583
584
585static void
586tracefile_context_finalize (LttvTracefileContext *self)
587{
588 G_OBJECT_CLASS(g_type_class_peek(g_type_parent(LTTV_TRACEFILE_CONTEXT_TYPE)))
589 ->finalize(G_OBJECT(self));
590}
591
592
593static void
594tracefile_context_class_init (LttvTracefileContextClass *klass)
595{
596 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
597
598 gobject_class->finalize = (void (*)(GObject *self))tracefile_context_finalize;
599}
600
601
602GType
603lttv_tracefile_context_get_type(void)
604{
605 static GType type = 0;
606 if (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),
615 0, /* n_preallocs */
616 (GInstanceInitFunc) tracefile_context_instance_init, /* instance_init */
617 NULL /* Value handling */
618 };
619
620 type = g_type_register_static (G_TYPE_OBJECT, "LttvTracefileContextType",
621 &info, 0);
622 }
623 return type;
624}
625
626
627
628static gboolean get_first(gpointer key, gpointer value, gpointer user_data) {
629 g_assert(key == value);
630 *((LttvTracefileContext **)user_data) = (LttvTracefileContext *)value;
631 return TRUE;
632}
633
634#ifdef DEBUG
635// Test to see if pqueue is traversed in the right order.
636static LttTime test_time;
637
638static gboolean test_tree(gpointer key, gpointer value, gpointer user_data) {
639
640 LttvTracefileContext *tfc = (LttvTracefileContext *)key;
641
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);
646
647 if(user_data != NULL) {
648 if(((LttvTracefileContext *)user_data) == (LttvTracefileContext *)value) {
649 g_assert(compare_tracefile(user_data, value) == 0);
650 } else
651 g_assert(compare_tracefile(user_data, value) != 0);
652 }
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;
656
657
658 //g_assert(((LttvTracefileContext *)user_data) != (LttvTracefileContext *)value);
659 return FALSE;
660}
661#endif //DEBUG
662
663
664
665void lttv_process_traceset_begin(LttvTracesetContext *self,
666 LttvHooks *before_traceset,
667 LttvHooks *before_trace,
668 LttvHooks *before_tracefile,
669 LttvHooks *event,
670 LttvHooksById *event_by_id)
671{
672
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,
676 before_traceset,
677 before_trace,
678 before_tracefile,
679 event,
680 event_by_id);
681
682}
683
684//enum read_state { LAST_NONE, LAST_OK, LAST_EMPTY };
685
686/* Note : a _middle must be preceded from a _seek or another middle */
687guint lttv_process_traceset_middle(LttvTracesetContext *self,
688 LttTime end,
689 guint nb_events,
690 const LttvTracesetContextPosition *end_position)
691{
692 GTree *pqueue = self->pqueue;
693
694 LttvTracefileContext *tfc;
695
696 LttEvent *e;
697
698 unsigned count = 0;
699
700 guint read_ret;
701
702 //enum read_state last_read_state = LAST_NONE;
703
704 gint last_ret = 0; /* return value of the last hook list called */
705
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
709 end time. */
710
711 while(TRUE) {
712 tfc = NULL;
713 g_tree_foreach(pqueue, get_first, &tfc);
714 /* End of traceset : tfc is NULL */
715 if(unlikely(tfc == NULL))
716 {
717 return count;
718 }
719
720 /* Have we reached :
721 * - the maximum number of events specified?
722 * - the end position ?
723 * - the end time ?
724 * then the read is finished. We leave the queue in the same state and
725 * break the loop.
726 */
727
728 if(unlikely(last_ret == TRUE ||
729 ((count >= nb_events) && (nb_events != G_MAXULONG)) ||
730 (end_position!=NULL&&lttv_traceset_context_ctx_pos_compare(self,
731 end_position) == 0)||
732 ltt_time_compare(end, tfc->timestamp) <= 0))
733 {
734 return count;
735 }
736
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. */
740
741#ifdef DEBUG
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);
746#endif //DEBUG
747 g_tree_remove(pqueue, tfc);
748
749#ifdef DEBUG
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);
754#endif //DEBUG
755
756
757 e = ltt_tracefile_get_event(tfc->tf);
758
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) */
762 count++;
763
764 tfc->target_pid = -1; /* unset target PID */
765 /* Hooks :
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);
770
771#if 0
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);
776 return count - 1;
777 }
778#endif //0
779 read_ret = ltt_tracefile_read(tfc->tf);
780
781
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);
787#ifdef DEBUG
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);
792#endif //DEBUG
793
794 //last_read_state = LAST_OK;
795 } else {
796 tfc->timestamp = ltt_time_infinite;
797
798 if(read_ret == ERANGE) {
799 // last_read_state = LAST_EMPTY;
800 g_debug("End of trace");
801 } else
802 g_error("Error happened in lttv_process_traceset_middle");
803 }
804 }
805}
806
807
808void lttv_process_traceset_end(LttvTracesetContext *self,
809 LttvHooks *after_traceset,
810 LttvHooks *after_trace,
811 LttvHooks *after_tracefile,
812 LttvHooks *event,
813 LttvHooksById *event_by_id)
814{
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,
818 after_traceset,
819 after_trace,
820 after_tracefile,
821 event,
822 event_by_id);
823}
824
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.
828 *
829 * Don't forget to empty the traceset pqueue before calling this.
830 */
831void lttv_process_trace_seek_time(LttvTraceContext *self, LttTime start)
832{
833 guint i, nb_tracefile;
834
835 gint ret;
836
837 LttvTracefileContext **tfc;
838
839 nb_tracefile = self->tracefiles->len;
840
841 GTree *pqueue = self->ts_context->pqueue;
842
843 for(i = 0 ; i < nb_tracefile ; i++) {
844 tfc = &g_array_index(self->tracefiles, LttvTracefileContext*, i);
845
846 g_tree_remove(pqueue, *tfc);
847
848 ret = ltt_tracefile_seek_time((*tfc)->tf, start);
849 if(ret == EPERM) g_error("error in lttv_process_trace_seek_time seek");
850
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));
855 } else {
856 (*tfc)->timestamp = ltt_time_infinite;
857 }
858 }
859#ifdef DEBUG
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);
864#endif //DEBUG
865
866
867
868}
869
870
871void lttv_process_traceset_seek_time(LttvTracesetContext *self, LttTime start)
872{
873 guint i, nb_trace;
874
875 LttvTraceContext *tc;
876
877 //g_tree_destroy(self->pqueue);
878 //self->pqueue = g_tree_new(compare_tracefile);
879
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);
884 }
885}
886
887
888gboolean lttv_process_traceset_seek_position(LttvTracesetContext *self,
889 const LttvTracesetContextPosition *pos)
890{
891 guint i;
892 /* If a position is set, seek the traceset to this position */
893 if(ltt_time_compare(pos->timestamp, ltt_time_infinite) != 0) {
894
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);
900 guint tf_count = 0;
901 for(i=0; i<num_traces;i++) {
902 GArray * tracefiles = self->traces[i]->tracefiles;
903 guint j;
904 guint num_tracefiles = tracefiles->len;
905 for(j=0;j<num_tracefiles;j++)
906 tf_count++;
907 }
908 g_assert(tf_count == pos->tfcp->len);
909
910
911 //g_tree_destroy(self->pqueue);
912 //self->pqueue = g_tree_new(compare_tracefile);
913
914 for(i=0;i<pos->tfcp->len; i++) {
915 LttvTracefileContextPosition *tfcp =
916 &g_array_index(pos->tfcp, LttvTracefileContextPosition, i);
917
918 g_tree_remove(self->pqueue, tfcp->tfc);
919
920 if(tfcp->used == TRUE) {
921 if(ltt_tracefile_seek_position(tfcp->tfc->tf, tfcp->event) != 0)
922 return 1;
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);
928
929 } else {
930 tfcp->tfc->timestamp = ltt_time_infinite;
931 }
932 }
933 }
934#ifdef DEBUG
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);
939#endif //DEBUG
940
941
942
943 return 0;
944}
945
946
947#if 0 // pmf: temporary disable
948static LttField *
949find_field(LttEventType *et, const GQuark field)
950{
951 LttField *f;
952
953 if(field == 0) return NULL;
954
955 f = ltt_eventtype_field_by_name(et, field);
956 if (!f) {
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)));
960 }
961
962 return f;
963}
964#endif
965
966struct marker_info *lttv_trace_hook_get_marker(LttTrace *t, LttvTraceHook *th)
967{
968 return marker_get_info_from_id(t, th->id);
969}
970
971int lttv_trace_find_hook(LttTrace *t, GQuark facility_name, GQuark event_name,
972 GQuark fields[], LttvHook h, gpointer hook_data, GArray **trace_hooks)
973{
974 struct marker_info *info;
975 guint16 marker_id;
976 int init_array_size;
977 GQuark marker_name;
978
979 marker_name = lttv_merge_facility_event_name(facility_name, event_name);
980
981 info = marker_get_info_from_name(t, marker_name);
982 if(unlikely(info == NULL)) {
983 g_warning("No marker of name %s found", g_quark_to_string(marker_name));
984 return 1;
985 }
986
987 init_array_size = (*trace_hooks)->len;
988
989 /* for each marker with the requested name */
990 do {
991 LttvTraceHook tmpth;
992 int found;
993 GQuark *f;
994 struct marker_field *marker_field;
995
996 marker_id = marker_get_id_from_info(t, info);
997
998 tmpth.h = h;
999 tmpth.id = marker_id;
1000 tmpth.hook_data = hook_data;
1001 tmpth.fields = g_ptr_array_new();
1002
1003 /* for each field requested */
1004 for(f = fields; f && *f != 0; f++) {
1005 found = 0;
1006 for_each_marker_field(marker_field, info) {
1007 if(marker_field->name == *f) {
1008 found = 1;
1009 g_ptr_array_add(tmpth.fields, marker_field);
1010 break;
1011 }
1012 }
1013 if(!found) {
1014 /* Did not find the one of the fields in this instance of the
1015 marker. Print a warning and skip this marker completely.
1016 Still iterate on other markers with same name. */
1017 g_ptr_array_free(tmpth.fields, TRUE);
1018 g_warning("Field %s cannot be found in marker %s",
1019 g_quark_to_string(*f), g_quark_to_string(marker_name));
1020 goto skip_marker;
1021 }
1022 }
1023 /* all fields were found: add the tracehook to the array */
1024 *trace_hooks = g_array_append_val(*trace_hooks, tmpth);
1025skip_marker:
1026 info = info->next;
1027 } while(info != NULL);
1028
1029 /* Error if no new trace hook has been added */
1030 if (init_array_size == (*trace_hooks)->len) {
1031 g_warning("No marker of name %s has all requested fields",
1032 g_quark_to_string(marker_name));
1033 return 1;
1034 }
1035 return 0;
1036}
1037
1038void lttv_trace_hook_remove_all(GArray **th)
1039{
1040 int i;
1041 for(i=0; i<(*th)->len; i++) {
1042 g_ptr_array_free(g_array_index(*th, LttvTraceHook, i).fields, TRUE);
1043 }
1044 *th = g_array_remove_range(*th, 0, (*th)->len);
1045}
1046
1047LttvTracesetContextPosition *lttv_traceset_context_position_new(
1048 const LttvTracesetContext *self)
1049{
1050 guint num_traces = lttv_traceset_number(self->ts);
1051 guint tf_count = 0;
1052 guint i;
1053
1054 for(i=0; i<num_traces;i++) {
1055 GArray * tracefiles = self->traces[i]->tracefiles;
1056 guint j;
1057 guint num_tracefiles = tracefiles->len;
1058 for(j=0;j<num_tracefiles;j++)
1059 tf_count++;
1060 }
1061 LttvTracesetContextPosition *pos =
1062 g_new(LttvTracesetContextPosition, 1);
1063 pos->tfcp = g_array_sized_new(FALSE, TRUE,
1064 sizeof(LttvTracefileContextPosition),
1065 tf_count);
1066 g_array_set_size(pos->tfcp, tf_count);
1067 for(i=0;i<pos->tfcp->len;i++) {
1068 LttvTracefileContextPosition *tfcp =
1069 &g_array_index(pos->tfcp, LttvTracefileContextPosition, i);
1070 tfcp->event = ltt_event_position_new();
1071 }
1072
1073 pos->timestamp = ltt_time_infinite;
1074 return pos;
1075}
1076
1077/* Save all positions, the ones with infinite time will have NULL
1078 * ep. */
1079/* note : a position must be destroyed when a trace is added/removed from a
1080 * traceset */
1081void lttv_traceset_context_position_save(const LttvTracesetContext *self,
1082 LttvTracesetContextPosition *pos)
1083{
1084 guint i;
1085 guint num_traces = lttv_traceset_number(self->ts);
1086 guint tf_count = 0;
1087
1088 pos->timestamp = ltt_time_infinite;
1089
1090 for(i=0; i<num_traces;i++) {
1091 GArray * tracefiles = self->traces[i]->tracefiles;
1092 guint j;
1093 guint num_tracefiles = tracefiles->len;
1094
1095 for(j=0;j<num_tracefiles;j++) {
1096 g_assert(tf_count < pos->tfcp->len);
1097 LttvTracefileContext **tfc = &g_array_index(tracefiles,
1098 LttvTracefileContext*, j);
1099 LttvTracefileContextPosition *tfcp =
1100 &g_array_index(pos->tfcp, LttvTracefileContextPosition, tf_count);
1101
1102 tfcp->tfc = *tfc;
1103
1104 if(ltt_time_compare((*tfc)->timestamp, ltt_time_infinite) != 0) {
1105 LttEvent *event = ltt_tracefile_get_event((*tfc)->tf);
1106 ltt_event_position(event, tfcp->event);
1107 if(ltt_time_compare((*tfc)->timestamp, pos->timestamp) < 0)
1108 pos->timestamp = (*tfc)->timestamp;
1109 tfcp->used = TRUE;
1110 } else {
1111 tfcp->used = FALSE;
1112 }
1113
1114 //g_array_append_val(pos->tfc, *tfc);
1115 //g_array_append_val(pos->ep, ep);
1116 tf_count++;
1117 }
1118
1119 }
1120}
1121
1122void lttv_traceset_context_position_destroy(LttvTracesetContextPosition *pos)
1123{
1124 int i;
1125
1126 for(i=0;i<pos->tfcp->len;i++) {
1127 LttvTracefileContextPosition *tfcp =
1128 &g_array_index(pos->tfcp, LttvTracefileContextPosition, i);
1129 g_free(tfcp->event);
1130 tfcp->event = NULL;
1131 tfcp->used = FALSE;
1132 }
1133 g_array_free(pos->tfcp, TRUE);
1134 g_free(pos);
1135}
1136
1137void lttv_traceset_context_position_copy(LttvTracesetContextPosition *dest,
1138 const LttvTracesetContextPosition *src)
1139{
1140 int i;
1141 LttvTracefileContextPosition *src_tfcp, *dest_tfcp;
1142
1143 g_assert(src->tfcp->len == src->tfcp->len);
1144
1145 for(i=0;i<src->tfcp->len;i++) {
1146 src_tfcp =
1147 &g_array_index(src->tfcp, LttvTracefileContextPosition, i);
1148 dest_tfcp =
1149 &g_array_index(dest->tfcp, LttvTracefileContextPosition, i);
1150
1151 dest_tfcp->used = src_tfcp->used;
1152 dest_tfcp->tfc = src_tfcp->tfc;
1153
1154 if(src_tfcp->used) {
1155 ltt_event_position_copy(
1156 dest_tfcp->event,
1157 src_tfcp->event);
1158 }
1159 }
1160 dest->timestamp = src->timestamp;
1161}
1162
1163gint lttv_traceset_context_ctx_pos_compare(const LttvTracesetContext *self,
1164 const LttvTracesetContextPosition *pos)
1165{
1166 int i;
1167 int ret = 0;
1168
1169 if(pos->tfcp->len == 0) {
1170 if(lttv_traceset_number(self->ts) == 0) return 0;
1171 else return 1;
1172 }
1173 if(lttv_traceset_number(self->ts) == 0)
1174 return -1;
1175
1176 for(i=0;i<pos->tfcp->len;i++) {
1177 LttvTracefileContextPosition *tfcp =
1178 &g_array_index(pos->tfcp, LttvTracefileContextPosition, i);
1179
1180 if(tfcp->used == FALSE) {
1181 if(ltt_time_compare(tfcp->tfc->timestamp, ltt_time_infinite) < 0) {
1182 ret = -1;
1183 }
1184 } else {
1185 if(ltt_time_compare(tfcp->tfc->timestamp, ltt_time_infinite) == 0) {
1186 ret = 1;
1187 } else {
1188 LttEvent *event = ltt_tracefile_get_event(tfcp->tfc->tf);
1189
1190 ret = ltt_event_position_compare((LttEventPosition*)event,
1191 tfcp->event);
1192 }
1193 }
1194 if(ret != 0) return ret;
1195
1196 }
1197 return 0;
1198}
1199
1200
1201gint lttv_traceset_context_pos_pos_compare(
1202 const LttvTracesetContextPosition *pos1,
1203 const LttvTracesetContextPosition *pos2)
1204{
1205 int i, j;
1206 int ret = 0;
1207
1208 if(ltt_time_compare(pos1->timestamp, ltt_time_infinite) == 0) {
1209 if(ltt_time_compare(pos2->timestamp, ltt_time_infinite) == 0)
1210 return 0;
1211 else
1212 return 1;
1213 }
1214 if(ltt_time_compare(pos2->timestamp, ltt_time_infinite) == 0)
1215 return -1;
1216
1217 for(i=0;i<pos1->tfcp->len;i++) {
1218 LttvTracefileContextPosition *tfcp1 =
1219 &g_array_index(pos1->tfcp, LttvTracefileContextPosition, i);
1220
1221 if(tfcp1->used == TRUE) {
1222 for(j=0;j<pos2->tfcp->len;j++) {
1223 LttvTracefileContextPosition *tfcp2 =
1224 &g_array_index(pos2->tfcp, LttvTracefileContextPosition, j);
1225
1226 if(tfcp1->tfc == tfcp2->tfc) {
1227 if(tfcp2->used == TRUE)
1228 ret = ltt_event_position_compare(tfcp1->event, tfcp2->event);
1229 else
1230 ret = -1;
1231
1232 if(ret != 0) return ret;
1233 }
1234 }
1235
1236 } else {
1237 for(j=0;j<pos2->tfcp->len;j++) {
1238 LttvTracefileContextPosition *tfcp2 =
1239 &g_array_index(pos2->tfcp, LttvTracefileContextPosition, j);
1240
1241 if(tfcp1->tfc == tfcp2->tfc)
1242 if(tfcp2->used == TRUE) ret = 1;
1243 if(ret != 0) return ret;
1244 }
1245 }
1246 }
1247 return 0;
1248}
1249
1250
1251LttTime lttv_traceset_context_position_get_time(
1252 const LttvTracesetContextPosition *pos)
1253{
1254 return pos->timestamp;
1255}
1256
1257
1258LttvTracefileContext *lttv_traceset_context_get_current_tfc(LttvTracesetContext *self)
1259{
1260 GTree *pqueue = self->pqueue;
1261 LttvTracefileContext *tfc = NULL;
1262
1263 g_tree_foreach(pqueue, get_first, &tfc);
1264
1265 return tfc;
1266}
1267
1268/* lttv_process_traceset_synchronize_tracefiles
1269 *
1270 * Use the sync_position field of the trace set context to synchronize each
1271 * tracefile with the previously saved position.
1272 *
1273 * If no previous position has been saved, it simply does nothing.
1274 */
1275void lttv_process_traceset_synchronize_tracefiles(LttvTracesetContext *tsc)
1276{
1277 g_assert(lttv_process_traceset_seek_position(tsc, tsc->sync_position) == 0);
1278}
1279
1280
1281
1282
1283void lttv_process_traceset_get_sync_data(LttvTracesetContext *tsc)
1284{
1285 lttv_traceset_context_position_save(tsc, tsc->sync_position);
1286}
1287
1288struct seek_back_data {
1289 guint first_event; /* Index of the first event in the array : we will always
1290 overwrite at this position : this is a circular array.
1291 */
1292 guint events_found;
1293 guint n; /* number of events requested */
1294 GPtrArray *array; /* array of LttvTracesetContextPositions pointers */
1295 LttvFilter *filter1;
1296 LttvFilter *filter2;
1297 LttvFilter *filter3;
1298 gpointer data;
1299 check_handler *check;
1300 gboolean *stop_flag;
1301 guint raw_event_count;
1302};
1303
1304static gint seek_back_event_hook(void *hook_data, void* call_data)
1305{
1306 struct seek_back_data *sd = (struct seek_back_data*)hook_data;
1307 LttvTracefileContext *tfc = (LttvTracefileContext*)call_data;
1308 LttvTracesetContext *tsc = tfc->t_context->ts_context;
1309 LttvTracesetContextPosition *pos;
1310
1311 if(sd->check && sd->check(sd->raw_event_count, sd->stop_flag, sd->data))
1312 return TRUE;
1313 sd->raw_event_count++;
1314
1315 if(sd->filter1 != NULL && sd->filter1->head != NULL &&
1316 !lttv_filter_tree_parse(sd->filter1->head,
1317 ltt_tracefile_get_event(tfc->tf),
1318 tfc->tf,
1319 tfc->t_context->t,
1320 tfc,NULL,NULL)) {
1321 return FALSE;
1322 }
1323 if(sd->filter2 != NULL && sd->filter2->head != NULL &&
1324 !lttv_filter_tree_parse(sd->filter2->head,
1325 ltt_tracefile_get_event(tfc->tf),
1326 tfc->tf,
1327 tfc->t_context->t,
1328 tfc,NULL,NULL)) {
1329 return FALSE;
1330 }
1331 if(sd->filter3 != NULL && sd->filter3->head != NULL &&
1332 !lttv_filter_tree_parse(sd->filter3->head,
1333 ltt_tracefile_get_event(tfc->tf),
1334 tfc->tf,
1335 tfc->t_context->t,
1336 tfc,NULL,NULL)) {
1337 return FALSE;
1338 }
1339
1340 pos = (LttvTracesetContextPosition*)g_ptr_array_index (sd->array,
1341 sd->first_event);
1342
1343 lttv_traceset_context_position_save(tsc, pos);
1344
1345 if(sd->first_event >= sd->array->len - 1) sd->first_event = 0;
1346 else sd->first_event++;
1347
1348 sd->events_found = min(sd->n, sd->events_found + 1);
1349
1350 return FALSE;
1351}
1352
1353/* Seek back n events back from the current position.
1354 *
1355 * Parameters :
1356 * @self The trace set context
1357 * @n number of events to jump over
1358 * @first_offset The initial offset value used.
1359 * never put first_offset at ltt_time_zero.
1360 * @time_seeker Function pointer of the function to use to seek time :
1361 * either lttv_process_traceset_seek_time
1362 * or lttv_state_traceset_seek_time_closest
1363 * @filter The filter to call.
1364 *
1365 * Return value : the number of events found (might be lower than the number
1366 * requested if beginning of traceset is reached).
1367 *
1368 * The first search will go back first_offset and try to find the last n events
1369 * matching the filter. If there are not enough, it will try to go back from the
1370 * new trace point from first_offset*2, and so on, until beginning of trace or n
1371 * events are found.
1372 *
1373 * Note : this function does not take in account the LttvFilter : use the
1374 * similar function found in state.c instead.
1375 *
1376 * Note2 : the caller must make sure that the LttvTracesetContext does not
1377 * contain any hook, as process_traceset_middle is used in this routine.
1378 */
1379guint lttv_process_traceset_seek_n_backward(LttvTracesetContext *self,
1380 guint n, LttTime first_offset,
1381 seek_time_fct time_seeker,
1382 check_handler *check,
1383 gboolean *stop_flag,
1384 LttvFilter *filter1,
1385 LttvFilter *filter2,
1386 LttvFilter *filter3,
1387 gpointer data)
1388{
1389 if(lttv_traceset_number(self->ts) == 0) return 0;
1390 g_assert(ltt_time_compare(first_offset, ltt_time_zero) != 0);
1391
1392 guint i;
1393 LttvTracesetContextPosition *next_iter_end_pos =
1394 lttv_traceset_context_position_new(self);
1395 LttvTracesetContextPosition *end_pos =
1396 lttv_traceset_context_position_new(self);
1397 LttvTracesetContextPosition *saved_pos =
1398 lttv_traceset_context_position_new(self);
1399 LttTime time;
1400 LttTime asked_time;
1401 LttTime time_offset;
1402 struct seek_back_data sd;
1403 LttvHooks *hooks = lttv_hooks_new();
1404
1405 sd.first_event = 0;
1406 sd.events_found = 0;
1407 sd.array = g_ptr_array_sized_new(n);
1408 sd.filter1 = filter1;
1409 sd.filter2 = filter2;
1410 sd.filter3 = filter3;
1411 sd.data = data;
1412 sd.n = n;
1413 sd.check = check;
1414 sd.stop_flag = stop_flag;
1415 sd.raw_event_count = 0;
1416 g_ptr_array_set_size(sd.array, n);
1417 for(i=0;i<n;i++) {
1418 g_ptr_array_index (sd.array, i) = lttv_traceset_context_position_new(self);
1419 }
1420
1421 lttv_traceset_context_position_save(self, next_iter_end_pos);
1422 lttv_traceset_context_position_save(self, saved_pos);
1423 /* Get the current time from which we will offset */
1424 time = lttv_traceset_context_position_get_time(next_iter_end_pos);
1425 /* the position saved might be end of traceset... */
1426 if(ltt_time_compare(time, self->time_span.end_time) > 0) {
1427 time = self->time_span.end_time;
1428 }
1429 asked_time = time;
1430 time_offset = first_offset;
1431
1432 lttv_hooks_add(hooks, seek_back_event_hook, &sd, LTTV_PRIO_DEFAULT);
1433
1434 lttv_process_traceset_begin(self, NULL, NULL, NULL, hooks, NULL);
1435
1436 while(1) {
1437 /* stop criteria : - n events found
1438 * - asked_time < beginning of trace */
1439 if(ltt_time_compare(asked_time, self->time_span.start_time) < 0) break;
1440
1441 lttv_traceset_context_position_copy(end_pos, next_iter_end_pos);
1442
1443 /* We must seek the traceset back to time - time_offset */
1444 /* this time becomes the new reference time */
1445 time = ltt_time_sub(time, time_offset);
1446 asked_time = time;
1447
1448 time_seeker(self, time);
1449 lttv_traceset_context_position_save(self, next_iter_end_pos);
1450 /* Resync the time in case of a seek_closest */
1451 time = lttv_traceset_context_position_get_time(next_iter_end_pos);
1452 if(ltt_time_compare(time, self->time_span.end_time) > 0) {
1453 time = self->time_span.end_time;
1454 }
1455
1456 /* Process the traceset, calling a hook which adds events
1457 * to the array, overwriting the tail. It changes first_event and
1458 * events_found too. */
1459 /* We would like to have a clean context here : no other hook than our's */
1460
1461 lttv_process_traceset_middle(self, ltt_time_infinite,
1462 G_MAXUINT, end_pos);
1463
1464 if(sd.events_found < n) {
1465 if(sd.first_event > 0) {
1466 /* Save the first position */
1467 LttvTracesetContextPosition *pos =
1468 (LttvTracesetContextPosition*)g_ptr_array_index (sd.array, 0);
1469 lttv_traceset_context_position_copy(saved_pos, pos);
1470 }
1471 g_assert(n-sd.events_found <= sd.array->len);
1472 /* Change array size to n - events_found */
1473 for(i=n-sd.events_found;i<sd.array->len;i++) {
1474 LttvTracesetContextPosition *pos =
1475 (LttvTracesetContextPosition*)g_ptr_array_index (sd.array, i);
1476 lttv_traceset_context_position_destroy(pos);
1477 }
1478 g_ptr_array_set_size(sd.array, n-sd.events_found);
1479 sd.first_event = 0;
1480
1481 } else break; /* Second end criterion : n events found */
1482
1483 time_offset = ltt_time_mul(time_offset, BACKWARD_SEEK_MUL);
1484 }
1485
1486 lttv_traceset_context_position_destroy(end_pos);
1487 lttv_traceset_context_position_destroy(next_iter_end_pos);
1488
1489 lttv_process_traceset_end(self, NULL, NULL, NULL, hooks, NULL);
1490
1491 if(sd.events_found >= n) {
1492 /* Seek the traceset to the first event in the circular array */
1493 LttvTracesetContextPosition *pos =
1494 (LttvTracesetContextPosition*)g_ptr_array_index (sd.array,
1495 sd.first_event);
1496 g_assert(lttv_process_traceset_seek_position(self, pos) == 0);
1497 } else {
1498 /* Will seek to the last saved position : in the worst case, it will be the
1499 * original position (if events_found is 0) */
1500 g_assert(lttv_process_traceset_seek_position(self, saved_pos) == 0);
1501 }
1502
1503 for(i=0;i<sd.array->len;i++) {
1504 LttvTracesetContextPosition *pos =
1505 (LttvTracesetContextPosition*)g_ptr_array_index (sd.array, i);
1506 lttv_traceset_context_position_destroy(pos);
1507 }
1508 g_ptr_array_free(sd.array, TRUE);
1509
1510 lttv_hooks_destroy(hooks);
1511
1512 lttv_traceset_context_position_destroy(saved_pos);
1513
1514 return sd.events_found;
1515}
1516
1517
1518struct seek_forward_data {
1519 guint event_count; /* event counter */
1520 guint n; /* requested number of events to jump over */
1521 LttvFilter *filter1;
1522 LttvFilter *filter2;
1523 LttvFilter *filter3;
1524 gpointer data;
1525 check_handler *check;
1526 gboolean *stop_flag;
1527 guint raw_event_count; /* event counter */
1528};
1529
1530static gint seek_forward_event_hook(void *hook_data, void* call_data)
1531{
1532 struct seek_forward_data *sd = (struct seek_forward_data*)hook_data;
1533 LttvTracefileContext *tfc = (LttvTracefileContext*)call_data;
1534
1535 if(sd->check && sd->check(sd->raw_event_count, sd->stop_flag, sd->data))
1536 return TRUE;
1537 sd->raw_event_count++;
1538
1539 if(sd->filter1 != NULL && sd->filter1->head != NULL &&
1540 !lttv_filter_tree_parse(sd->filter1->head,
1541 ltt_tracefile_get_event(tfc->tf),
1542 tfc->tf,
1543 tfc->t_context->t,
1544 tfc,NULL,NULL)) {
1545 return FALSE;
1546 }
1547 if(sd->filter2 != NULL && sd->filter2->head != NULL &&
1548 !lttv_filter_tree_parse(sd->filter2->head,
1549 ltt_tracefile_get_event(tfc->tf),
1550 tfc->tf,
1551 tfc->t_context->t,
1552 tfc,NULL,NULL)) {
1553 return FALSE;
1554 }
1555 if(sd->filter3 != NULL && sd->filter3->head != NULL &&
1556 !lttv_filter_tree_parse(sd->filter3->head,
1557 ltt_tracefile_get_event(tfc->tf),
1558 tfc->tf,
1559 tfc->t_context->t,
1560 tfc,NULL,NULL)) {
1561 return FALSE;
1562 }
1563
1564 sd->event_count++;
1565 if(sd->event_count >= sd->n)
1566 return TRUE;
1567 return FALSE;
1568}
1569
1570/* Seek back n events forward from the current position (1 to n)
1571 * 0 is ok too, but it will actually do nothing.
1572 *
1573 * Parameters :
1574 * @self the trace set context
1575 * @n number of events to jump over
1576 * @filter filter to call.
1577 *
1578 * returns : the number of events jumped over (may be less than requested if end
1579 * of traceset reached) */
1580guint lttv_process_traceset_seek_n_forward(LttvTracesetContext *self,
1581 guint n,
1582 check_handler *check,
1583 gboolean *stop_flag,
1584 LttvFilter *filter1,
1585 LttvFilter *filter2,
1586 LttvFilter *filter3,
1587 gpointer data)
1588{
1589 struct seek_forward_data sd;
1590 sd.event_count = 0;
1591 sd.n = n;
1592 sd.filter1 = filter1;
1593 sd.filter2 = filter2;
1594 sd.filter3 = filter3;
1595 sd.data = data;
1596 sd.check = check;
1597 sd.stop_flag = stop_flag;
1598 sd.raw_event_count = 0;
1599
1600 if(sd.event_count >= sd.n) return sd.event_count;
1601
1602 LttvHooks *hooks = lttv_hooks_new();
1603
1604 lttv_hooks_add(hooks, seek_forward_event_hook, &sd, LTTV_PRIO_DEFAULT);
1605
1606 lttv_process_traceset_begin(self, NULL, NULL, NULL, hooks, NULL);
1607
1608 /* it will end on the end of traceset, or the fact that the
1609 * hook returns TRUE.
1610 */
1611 lttv_process_traceset_middle(self, ltt_time_infinite,
1612 G_MAXUINT, NULL);
1613
1614 /* Here, our position is either the end of traceset, or the exact position
1615 * after n events : leave it like this. This might be placed on an event that
1616 * will be filtered out, we don't care : all we know is that the following
1617 * event filtered in will be the right one. */
1618
1619 lttv_process_traceset_end(self, NULL, NULL, NULL, hooks, NULL);
1620
1621 lttv_hooks_destroy(hooks);
1622
1623 return sd.event_count;
1624}
1625
1626
LTTng 2.x Viewer (LTTV)
This page took 0.087619 seconds and 4 git commands to generate.