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Merge tag 'drm-intel-next-2016-03-30' of git://anongit.freedesktop.org/drm-intel...
[deliverable/linux.git] / tools / perf / util / data-convert-bt.c
1 /*
2 * CTF writing support via babeltrace.
3 *
4 * Copyright (C) 2014, Jiri Olsa <jolsa@redhat.com>
5 * Copyright (C) 2014, Sebastian Andrzej Siewior <bigeasy@linutronix.de>
6 *
7 * Released under the GPL v2. (and only v2, not any later version)
8 */
9
10 #include <linux/compiler.h>
11 #include <babeltrace/ctf-writer/writer.h>
12 #include <babeltrace/ctf-writer/clock.h>
13 #include <babeltrace/ctf-writer/stream.h>
14 #include <babeltrace/ctf-writer/event.h>
15 #include <babeltrace/ctf-writer/event-types.h>
16 #include <babeltrace/ctf-writer/event-fields.h>
17 #include <babeltrace/ctf-ir/utils.h>
18 #include <babeltrace/ctf/events.h>
19 #include <traceevent/event-parse.h>
20 #include "asm/bug.h"
21 #include "data-convert-bt.h"
22 #include "session.h"
23 #include "util.h"
24 #include "debug.h"
25 #include "tool.h"
26 #include "evlist.h"
27 #include "evsel.h"
28 #include "machine.h"
29
30 #define pr_N(n, fmt, ...) \
31 eprintf(n, debug_data_convert, fmt, ##__VA_ARGS__)
32
33 #define pr(fmt, ...) pr_N(1, pr_fmt(fmt), ##__VA_ARGS__)
34 #define pr2(fmt, ...) pr_N(2, pr_fmt(fmt), ##__VA_ARGS__)
35
36 #define pr_time2(t, fmt, ...) pr_time_N(2, debug_data_convert, t, pr_fmt(fmt), ##__VA_ARGS__)
37
38 struct evsel_priv {
39 struct bt_ctf_event_class *event_class;
40 };
41
42 #define MAX_CPUS 4096
43
44 struct ctf_stream {
45 struct bt_ctf_stream *stream;
46 int cpu;
47 u32 count;
48 };
49
50 struct ctf_writer {
51 /* writer primitives */
52 struct bt_ctf_writer *writer;
53 struct ctf_stream **stream;
54 int stream_cnt;
55 struct bt_ctf_stream_class *stream_class;
56 struct bt_ctf_clock *clock;
57
58 /* data types */
59 union {
60 struct {
61 struct bt_ctf_field_type *s64;
62 struct bt_ctf_field_type *u64;
63 struct bt_ctf_field_type *s32;
64 struct bt_ctf_field_type *u32;
65 struct bt_ctf_field_type *string;
66 struct bt_ctf_field_type *u32_hex;
67 struct bt_ctf_field_type *u64_hex;
68 };
69 struct bt_ctf_field_type *array[6];
70 } data;
71 };
72
73 struct convert {
74 struct perf_tool tool;
75 struct ctf_writer writer;
76
77 u64 events_size;
78 u64 events_count;
79
80 /* Ordered events configured queue size. */
81 u64 queue_size;
82 };
83
84 static int value_set(struct bt_ctf_field_type *type,
85 struct bt_ctf_event *event,
86 const char *name, u64 val)
87 {
88 struct bt_ctf_field *field;
89 bool sign = bt_ctf_field_type_integer_get_signed(type);
90 int ret;
91
92 field = bt_ctf_field_create(type);
93 if (!field) {
94 pr_err("failed to create a field %s\n", name);
95 return -1;
96 }
97
98 if (sign) {
99 ret = bt_ctf_field_signed_integer_set_value(field, val);
100 if (ret) {
101 pr_err("failed to set field value %s\n", name);
102 goto err;
103 }
104 } else {
105 ret = bt_ctf_field_unsigned_integer_set_value(field, val);
106 if (ret) {
107 pr_err("failed to set field value %s\n", name);
108 goto err;
109 }
110 }
111
112 ret = bt_ctf_event_set_payload(event, name, field);
113 if (ret) {
114 pr_err("failed to set payload %s\n", name);
115 goto err;
116 }
117
118 pr2(" SET [%s = %" PRIu64 "]\n", name, val);
119
120 err:
121 bt_ctf_field_put(field);
122 return ret;
123 }
124
125 #define __FUNC_VALUE_SET(_name, _val_type) \
126 static __maybe_unused int value_set_##_name(struct ctf_writer *cw, \
127 struct bt_ctf_event *event, \
128 const char *name, \
129 _val_type val) \
130 { \
131 struct bt_ctf_field_type *type = cw->data._name; \
132 return value_set(type, event, name, (u64) val); \
133 }
134
135 #define FUNC_VALUE_SET(_name) __FUNC_VALUE_SET(_name, _name)
136
137 FUNC_VALUE_SET(s32)
138 FUNC_VALUE_SET(u32)
139 FUNC_VALUE_SET(s64)
140 FUNC_VALUE_SET(u64)
141 __FUNC_VALUE_SET(u64_hex, u64)
142
143 static struct bt_ctf_field_type*
144 get_tracepoint_field_type(struct ctf_writer *cw, struct format_field *field)
145 {
146 unsigned long flags = field->flags;
147
148 if (flags & FIELD_IS_STRING)
149 return cw->data.string;
150
151 if (!(flags & FIELD_IS_SIGNED)) {
152 /* unsigned long are mostly pointers */
153 if (flags & FIELD_IS_LONG || flags & FIELD_IS_POINTER)
154 return cw->data.u64_hex;
155 }
156
157 if (flags & FIELD_IS_SIGNED) {
158 if (field->size == 8)
159 return cw->data.s64;
160 else
161 return cw->data.s32;
162 }
163
164 if (field->size == 8)
165 return cw->data.u64;
166 else
167 return cw->data.u32;
168 }
169
170 static unsigned long long adjust_signedness(unsigned long long value_int, int size)
171 {
172 unsigned long long value_mask;
173
174 /*
175 * value_mask = (1 << (size * 8 - 1)) - 1.
176 * Directly set value_mask for code readers.
177 */
178 switch (size) {
179 case 1:
180 value_mask = 0x7fULL;
181 break;
182 case 2:
183 value_mask = 0x7fffULL;
184 break;
185 case 4:
186 value_mask = 0x7fffffffULL;
187 break;
188 case 8:
189 /*
190 * For 64 bit value, return it self. There is no need
191 * to fill high bit.
192 */
193 /* Fall through */
194 default:
195 /* BUG! */
196 return value_int;
197 }
198
199 /* If it is a positive value, don't adjust. */
200 if ((value_int & (~0ULL - value_mask)) == 0)
201 return value_int;
202
203 /* Fill upper part of value_int with 1 to make it a negative long long. */
204 return (value_int & value_mask) | ~value_mask;
205 }
206
207 static int add_tracepoint_field_value(struct ctf_writer *cw,
208 struct bt_ctf_event_class *event_class,
209 struct bt_ctf_event *event,
210 struct perf_sample *sample,
211 struct format_field *fmtf)
212 {
213 struct bt_ctf_field_type *type;
214 struct bt_ctf_field *array_field;
215 struct bt_ctf_field *field;
216 const char *name = fmtf->name;
217 void *data = sample->raw_data;
218 unsigned long flags = fmtf->flags;
219 unsigned int n_items;
220 unsigned int i;
221 unsigned int offset;
222 unsigned int len;
223 int ret;
224
225 name = fmtf->alias;
226 offset = fmtf->offset;
227 len = fmtf->size;
228 if (flags & FIELD_IS_STRING)
229 flags &= ~FIELD_IS_ARRAY;
230
231 if (flags & FIELD_IS_DYNAMIC) {
232 unsigned long long tmp_val;
233
234 tmp_val = pevent_read_number(fmtf->event->pevent,
235 data + offset, len);
236 offset = tmp_val;
237 len = offset >> 16;
238 offset &= 0xffff;
239 }
240
241 if (flags & FIELD_IS_ARRAY) {
242
243 type = bt_ctf_event_class_get_field_by_name(
244 event_class, name);
245 array_field = bt_ctf_field_create(type);
246 bt_ctf_field_type_put(type);
247 if (!array_field) {
248 pr_err("Failed to create array type %s\n", name);
249 return -1;
250 }
251
252 len = fmtf->size / fmtf->arraylen;
253 n_items = fmtf->arraylen;
254 } else {
255 n_items = 1;
256 array_field = NULL;
257 }
258
259 type = get_tracepoint_field_type(cw, fmtf);
260
261 for (i = 0; i < n_items; i++) {
262 if (flags & FIELD_IS_ARRAY)
263 field = bt_ctf_field_array_get_field(array_field, i);
264 else
265 field = bt_ctf_field_create(type);
266
267 if (!field) {
268 pr_err("failed to create a field %s\n", name);
269 return -1;
270 }
271
272 if (flags & FIELD_IS_STRING)
273 ret = bt_ctf_field_string_set_value(field,
274 data + offset + i * len);
275 else {
276 unsigned long long value_int;
277
278 value_int = pevent_read_number(
279 fmtf->event->pevent,
280 data + offset + i * len, len);
281
282 if (!(flags & FIELD_IS_SIGNED))
283 ret = bt_ctf_field_unsigned_integer_set_value(
284 field, value_int);
285 else
286 ret = bt_ctf_field_signed_integer_set_value(
287 field, adjust_signedness(value_int, len));
288 }
289
290 if (ret) {
291 pr_err("failed to set file value %s\n", name);
292 goto err_put_field;
293 }
294 if (!(flags & FIELD_IS_ARRAY)) {
295 ret = bt_ctf_event_set_payload(event, name, field);
296 if (ret) {
297 pr_err("failed to set payload %s\n", name);
298 goto err_put_field;
299 }
300 }
301 bt_ctf_field_put(field);
302 }
303 if (flags & FIELD_IS_ARRAY) {
304 ret = bt_ctf_event_set_payload(event, name, array_field);
305 if (ret) {
306 pr_err("Failed add payload array %s\n", name);
307 return -1;
308 }
309 bt_ctf_field_put(array_field);
310 }
311 return 0;
312
313 err_put_field:
314 bt_ctf_field_put(field);
315 return -1;
316 }
317
318 static int add_tracepoint_fields_values(struct ctf_writer *cw,
319 struct bt_ctf_event_class *event_class,
320 struct bt_ctf_event *event,
321 struct format_field *fields,
322 struct perf_sample *sample)
323 {
324 struct format_field *field;
325 int ret;
326
327 for (field = fields; field; field = field->next) {
328 ret = add_tracepoint_field_value(cw, event_class, event, sample,
329 field);
330 if (ret)
331 return -1;
332 }
333 return 0;
334 }
335
336 static int add_tracepoint_values(struct ctf_writer *cw,
337 struct bt_ctf_event_class *event_class,
338 struct bt_ctf_event *event,
339 struct perf_evsel *evsel,
340 struct perf_sample *sample)
341 {
342 struct format_field *common_fields = evsel->tp_format->format.common_fields;
343 struct format_field *fields = evsel->tp_format->format.fields;
344 int ret;
345
346 ret = add_tracepoint_fields_values(cw, event_class, event,
347 common_fields, sample);
348 if (!ret)
349 ret = add_tracepoint_fields_values(cw, event_class, event,
350 fields, sample);
351
352 return ret;
353 }
354
355 static int
356 add_bpf_output_values(struct bt_ctf_event_class *event_class,
357 struct bt_ctf_event *event,
358 struct perf_sample *sample)
359 {
360 struct bt_ctf_field_type *len_type, *seq_type;
361 struct bt_ctf_field *len_field, *seq_field;
362 unsigned int raw_size = sample->raw_size;
363 unsigned int nr_elements = raw_size / sizeof(u32);
364 unsigned int i;
365 int ret;
366
367 if (nr_elements * sizeof(u32) != raw_size)
368 pr_warning("Incorrect raw_size (%u) in bpf output event, skip %lu bytes\n",
369 raw_size, nr_elements * sizeof(u32) - raw_size);
370
371 len_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_len");
372 len_field = bt_ctf_field_create(len_type);
373 if (!len_field) {
374 pr_err("failed to create 'raw_len' for bpf output event\n");
375 ret = -1;
376 goto put_len_type;
377 }
378
379 ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
380 if (ret) {
381 pr_err("failed to set field value for raw_len\n");
382 goto put_len_field;
383 }
384 ret = bt_ctf_event_set_payload(event, "raw_len", len_field);
385 if (ret) {
386 pr_err("failed to set payload to raw_len\n");
387 goto put_len_field;
388 }
389
390 seq_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_data");
391 seq_field = bt_ctf_field_create(seq_type);
392 if (!seq_field) {
393 pr_err("failed to create 'raw_data' for bpf output event\n");
394 ret = -1;
395 goto put_seq_type;
396 }
397
398 ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
399 if (ret) {
400 pr_err("failed to set length of 'raw_data'\n");
401 goto put_seq_field;
402 }
403
404 for (i = 0; i < nr_elements; i++) {
405 struct bt_ctf_field *elem_field =
406 bt_ctf_field_sequence_get_field(seq_field, i);
407
408 ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
409 ((u32 *)(sample->raw_data))[i]);
410
411 bt_ctf_field_put(elem_field);
412 if (ret) {
413 pr_err("failed to set raw_data[%d]\n", i);
414 goto put_seq_field;
415 }
416 }
417
418 ret = bt_ctf_event_set_payload(event, "raw_data", seq_field);
419 if (ret)
420 pr_err("failed to set payload for raw_data\n");
421
422 put_seq_field:
423 bt_ctf_field_put(seq_field);
424 put_seq_type:
425 bt_ctf_field_type_put(seq_type);
426 put_len_field:
427 bt_ctf_field_put(len_field);
428 put_len_type:
429 bt_ctf_field_type_put(len_type);
430 return ret;
431 }
432
433 static int add_generic_values(struct ctf_writer *cw,
434 struct bt_ctf_event *event,
435 struct perf_evsel *evsel,
436 struct perf_sample *sample)
437 {
438 u64 type = evsel->attr.sample_type;
439 int ret;
440
441 /*
442 * missing:
443 * PERF_SAMPLE_TIME - not needed as we have it in
444 * ctf event header
445 * PERF_SAMPLE_READ - TODO
446 * PERF_SAMPLE_CALLCHAIN - TODO
447 * PERF_SAMPLE_RAW - tracepoint fields are handled separately
448 * PERF_SAMPLE_BRANCH_STACK - TODO
449 * PERF_SAMPLE_REGS_USER - TODO
450 * PERF_SAMPLE_STACK_USER - TODO
451 */
452
453 if (type & PERF_SAMPLE_IP) {
454 ret = value_set_u64_hex(cw, event, "perf_ip", sample->ip);
455 if (ret)
456 return -1;
457 }
458
459 if (type & PERF_SAMPLE_TID) {
460 ret = value_set_s32(cw, event, "perf_tid", sample->tid);
461 if (ret)
462 return -1;
463
464 ret = value_set_s32(cw, event, "perf_pid", sample->pid);
465 if (ret)
466 return -1;
467 }
468
469 if ((type & PERF_SAMPLE_ID) ||
470 (type & PERF_SAMPLE_IDENTIFIER)) {
471 ret = value_set_u64(cw, event, "perf_id", sample->id);
472 if (ret)
473 return -1;
474 }
475
476 if (type & PERF_SAMPLE_STREAM_ID) {
477 ret = value_set_u64(cw, event, "perf_stream_id", sample->stream_id);
478 if (ret)
479 return -1;
480 }
481
482 if (type & PERF_SAMPLE_PERIOD) {
483 ret = value_set_u64(cw, event, "perf_period", sample->period);
484 if (ret)
485 return -1;
486 }
487
488 if (type & PERF_SAMPLE_WEIGHT) {
489 ret = value_set_u64(cw, event, "perf_weight", sample->weight);
490 if (ret)
491 return -1;
492 }
493
494 if (type & PERF_SAMPLE_DATA_SRC) {
495 ret = value_set_u64(cw, event, "perf_data_src",
496 sample->data_src);
497 if (ret)
498 return -1;
499 }
500
501 if (type & PERF_SAMPLE_TRANSACTION) {
502 ret = value_set_u64(cw, event, "perf_transaction",
503 sample->transaction);
504 if (ret)
505 return -1;
506 }
507
508 return 0;
509 }
510
511 static int ctf_stream__flush(struct ctf_stream *cs)
512 {
513 int err = 0;
514
515 if (cs) {
516 err = bt_ctf_stream_flush(cs->stream);
517 if (err)
518 pr_err("CTF stream %d flush failed\n", cs->cpu);
519
520 pr("Flush stream for cpu %d (%u samples)\n",
521 cs->cpu, cs->count);
522
523 cs->count = 0;
524 }
525
526 return err;
527 }
528
529 static struct ctf_stream *ctf_stream__create(struct ctf_writer *cw, int cpu)
530 {
531 struct ctf_stream *cs;
532 struct bt_ctf_field *pkt_ctx = NULL;
533 struct bt_ctf_field *cpu_field = NULL;
534 struct bt_ctf_stream *stream = NULL;
535 int ret;
536
537 cs = zalloc(sizeof(*cs));
538 if (!cs) {
539 pr_err("Failed to allocate ctf stream\n");
540 return NULL;
541 }
542
543 stream = bt_ctf_writer_create_stream(cw->writer, cw->stream_class);
544 if (!stream) {
545 pr_err("Failed to create CTF stream\n");
546 goto out;
547 }
548
549 pkt_ctx = bt_ctf_stream_get_packet_context(stream);
550 if (!pkt_ctx) {
551 pr_err("Failed to obtain packet context\n");
552 goto out;
553 }
554
555 cpu_field = bt_ctf_field_structure_get_field(pkt_ctx, "cpu_id");
556 bt_ctf_field_put(pkt_ctx);
557 if (!cpu_field) {
558 pr_err("Failed to obtain cpu field\n");
559 goto out;
560 }
561
562 ret = bt_ctf_field_unsigned_integer_set_value(cpu_field, (u32) cpu);
563 if (ret) {
564 pr_err("Failed to update CPU number\n");
565 goto out;
566 }
567
568 bt_ctf_field_put(cpu_field);
569
570 cs->cpu = cpu;
571 cs->stream = stream;
572 return cs;
573
574 out:
575 if (cpu_field)
576 bt_ctf_field_put(cpu_field);
577 if (stream)
578 bt_ctf_stream_put(stream);
579
580 free(cs);
581 return NULL;
582 }
583
584 static void ctf_stream__delete(struct ctf_stream *cs)
585 {
586 if (cs) {
587 bt_ctf_stream_put(cs->stream);
588 free(cs);
589 }
590 }
591
592 static struct ctf_stream *ctf_stream(struct ctf_writer *cw, int cpu)
593 {
594 struct ctf_stream *cs = cw->stream[cpu];
595
596 if (!cs) {
597 cs = ctf_stream__create(cw, cpu);
598 cw->stream[cpu] = cs;
599 }
600
601 return cs;
602 }
603
604 static int get_sample_cpu(struct ctf_writer *cw, struct perf_sample *sample,
605 struct perf_evsel *evsel)
606 {
607 int cpu = 0;
608
609 if (evsel->attr.sample_type & PERF_SAMPLE_CPU)
610 cpu = sample->cpu;
611
612 if (cpu > cw->stream_cnt) {
613 pr_err("Event was recorded for CPU %d, limit is at %d.\n",
614 cpu, cw->stream_cnt);
615 cpu = 0;
616 }
617
618 return cpu;
619 }
620
621 #define STREAM_FLUSH_COUNT 100000
622
623 /*
624 * Currently we have no other way to determine the
625 * time for the stream flush other than keep track
626 * of the number of events and check it against
627 * threshold.
628 */
629 static bool is_flush_needed(struct ctf_stream *cs)
630 {
631 return cs->count >= STREAM_FLUSH_COUNT;
632 }
633
634 static int process_sample_event(struct perf_tool *tool,
635 union perf_event *_event,
636 struct perf_sample *sample,
637 struct perf_evsel *evsel,
638 struct machine *machine __maybe_unused)
639 {
640 struct convert *c = container_of(tool, struct convert, tool);
641 struct evsel_priv *priv = evsel->priv;
642 struct ctf_writer *cw = &c->writer;
643 struct ctf_stream *cs;
644 struct bt_ctf_event_class *event_class;
645 struct bt_ctf_event *event;
646 int ret;
647
648 if (WARN_ONCE(!priv, "Failed to setup all events.\n"))
649 return 0;
650
651 event_class = priv->event_class;
652
653 /* update stats */
654 c->events_count++;
655 c->events_size += _event->header.size;
656
657 pr_time2(sample->time, "sample %" PRIu64 "\n", c->events_count);
658
659 event = bt_ctf_event_create(event_class);
660 if (!event) {
661 pr_err("Failed to create an CTF event\n");
662 return -1;
663 }
664
665 bt_ctf_clock_set_time(cw->clock, sample->time);
666
667 ret = add_generic_values(cw, event, evsel, sample);
668 if (ret)
669 return -1;
670
671 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
672 ret = add_tracepoint_values(cw, event_class, event,
673 evsel, sample);
674 if (ret)
675 return -1;
676 }
677
678 if (perf_evsel__is_bpf_output(evsel)) {
679 ret = add_bpf_output_values(event_class, event, sample);
680 if (ret)
681 return -1;
682 }
683
684 cs = ctf_stream(cw, get_sample_cpu(cw, sample, evsel));
685 if (cs) {
686 if (is_flush_needed(cs))
687 ctf_stream__flush(cs);
688
689 cs->count++;
690 bt_ctf_stream_append_event(cs->stream, event);
691 }
692
693 bt_ctf_event_put(event);
694 return cs ? 0 : -1;
695 }
696
697 /* If dup < 0, add a prefix. Else, add _dupl_X suffix. */
698 static char *change_name(char *name, char *orig_name, int dup)
699 {
700 char *new_name = NULL;
701 size_t len;
702
703 if (!name)
704 name = orig_name;
705
706 if (dup >= 10)
707 goto out;
708 /*
709 * Add '_' prefix to potential keywork. According to
710 * Mathieu Desnoyers (https://lkml.org/lkml/2015/1/23/652),
711 * futher CTF spec updating may require us to use '$'.
712 */
713 if (dup < 0)
714 len = strlen(name) + sizeof("_");
715 else
716 len = strlen(orig_name) + sizeof("_dupl_X");
717
718 new_name = malloc(len);
719 if (!new_name)
720 goto out;
721
722 if (dup < 0)
723 snprintf(new_name, len, "_%s", name);
724 else
725 snprintf(new_name, len, "%s_dupl_%d", orig_name, dup);
726
727 out:
728 if (name != orig_name)
729 free(name);
730 return new_name;
731 }
732
733 static int event_class_add_field(struct bt_ctf_event_class *event_class,
734 struct bt_ctf_field_type *type,
735 struct format_field *field)
736 {
737 struct bt_ctf_field_type *t = NULL;
738 char *name;
739 int dup = 1;
740 int ret;
741
742 /* alias was already assigned */
743 if (field->alias != field->name)
744 return bt_ctf_event_class_add_field(event_class, type,
745 (char *)field->alias);
746
747 name = field->name;
748
749 /* If 'name' is a keywork, add prefix. */
750 if (bt_ctf_validate_identifier(name))
751 name = change_name(name, field->name, -1);
752
753 if (!name) {
754 pr_err("Failed to fix invalid identifier.");
755 return -1;
756 }
757 while ((t = bt_ctf_event_class_get_field_by_name(event_class, name))) {
758 bt_ctf_field_type_put(t);
759 name = change_name(name, field->name, dup++);
760 if (!name) {
761 pr_err("Failed to create dup name for '%s'\n", field->name);
762 return -1;
763 }
764 }
765
766 ret = bt_ctf_event_class_add_field(event_class, type, name);
767 if (!ret)
768 field->alias = name;
769
770 return ret;
771 }
772
773 static int add_tracepoint_fields_types(struct ctf_writer *cw,
774 struct format_field *fields,
775 struct bt_ctf_event_class *event_class)
776 {
777 struct format_field *field;
778 int ret;
779
780 for (field = fields; field; field = field->next) {
781 struct bt_ctf_field_type *type;
782 unsigned long flags = field->flags;
783
784 pr2(" field '%s'\n", field->name);
785
786 type = get_tracepoint_field_type(cw, field);
787 if (!type)
788 return -1;
789
790 /*
791 * A string is an array of chars. For this we use the string
792 * type and don't care that it is an array. What we don't
793 * support is an array of strings.
794 */
795 if (flags & FIELD_IS_STRING)
796 flags &= ~FIELD_IS_ARRAY;
797
798 if (flags & FIELD_IS_ARRAY)
799 type = bt_ctf_field_type_array_create(type, field->arraylen);
800
801 ret = event_class_add_field(event_class, type, field);
802
803 if (flags & FIELD_IS_ARRAY)
804 bt_ctf_field_type_put(type);
805
806 if (ret) {
807 pr_err("Failed to add field '%s': %d\n",
808 field->name, ret);
809 return -1;
810 }
811 }
812
813 return 0;
814 }
815
816 static int add_tracepoint_types(struct ctf_writer *cw,
817 struct perf_evsel *evsel,
818 struct bt_ctf_event_class *class)
819 {
820 struct format_field *common_fields = evsel->tp_format->format.common_fields;
821 struct format_field *fields = evsel->tp_format->format.fields;
822 int ret;
823
824 ret = add_tracepoint_fields_types(cw, common_fields, class);
825 if (!ret)
826 ret = add_tracepoint_fields_types(cw, fields, class);
827
828 return ret;
829 }
830
831 static int add_bpf_output_types(struct ctf_writer *cw,
832 struct bt_ctf_event_class *class)
833 {
834 struct bt_ctf_field_type *len_type = cw->data.u32;
835 struct bt_ctf_field_type *seq_base_type = cw->data.u32_hex;
836 struct bt_ctf_field_type *seq_type;
837 int ret;
838
839 ret = bt_ctf_event_class_add_field(class, len_type, "raw_len");
840 if (ret)
841 return ret;
842
843 seq_type = bt_ctf_field_type_sequence_create(seq_base_type, "raw_len");
844 if (!seq_type)
845 return -1;
846
847 return bt_ctf_event_class_add_field(class, seq_type, "raw_data");
848 }
849
850 static int add_generic_types(struct ctf_writer *cw, struct perf_evsel *evsel,
851 struct bt_ctf_event_class *event_class)
852 {
853 u64 type = evsel->attr.sample_type;
854
855 /*
856 * missing:
857 * PERF_SAMPLE_TIME - not needed as we have it in
858 * ctf event header
859 * PERF_SAMPLE_READ - TODO
860 * PERF_SAMPLE_CALLCHAIN - TODO
861 * PERF_SAMPLE_RAW - tracepoint fields and BPF output
862 * are handled separately
863 * PERF_SAMPLE_BRANCH_STACK - TODO
864 * PERF_SAMPLE_REGS_USER - TODO
865 * PERF_SAMPLE_STACK_USER - TODO
866 */
867
868 #define ADD_FIELD(cl, t, n) \
869 do { \
870 pr2(" field '%s'\n", n); \
871 if (bt_ctf_event_class_add_field(cl, t, n)) { \
872 pr_err("Failed to add field '%s';\n", n); \
873 return -1; \
874 } \
875 } while (0)
876
877 if (type & PERF_SAMPLE_IP)
878 ADD_FIELD(event_class, cw->data.u64_hex, "perf_ip");
879
880 if (type & PERF_SAMPLE_TID) {
881 ADD_FIELD(event_class, cw->data.s32, "perf_tid");
882 ADD_FIELD(event_class, cw->data.s32, "perf_pid");
883 }
884
885 if ((type & PERF_SAMPLE_ID) ||
886 (type & PERF_SAMPLE_IDENTIFIER))
887 ADD_FIELD(event_class, cw->data.u64, "perf_id");
888
889 if (type & PERF_SAMPLE_STREAM_ID)
890 ADD_FIELD(event_class, cw->data.u64, "perf_stream_id");
891
892 if (type & PERF_SAMPLE_PERIOD)
893 ADD_FIELD(event_class, cw->data.u64, "perf_period");
894
895 if (type & PERF_SAMPLE_WEIGHT)
896 ADD_FIELD(event_class, cw->data.u64, "perf_weight");
897
898 if (type & PERF_SAMPLE_DATA_SRC)
899 ADD_FIELD(event_class, cw->data.u64, "perf_data_src");
900
901 if (type & PERF_SAMPLE_TRANSACTION)
902 ADD_FIELD(event_class, cw->data.u64, "perf_transaction");
903
904 #undef ADD_FIELD
905 return 0;
906 }
907
908 static int add_event(struct ctf_writer *cw, struct perf_evsel *evsel)
909 {
910 struct bt_ctf_event_class *event_class;
911 struct evsel_priv *priv;
912 const char *name = perf_evsel__name(evsel);
913 int ret;
914
915 pr("Adding event '%s' (type %d)\n", name, evsel->attr.type);
916
917 event_class = bt_ctf_event_class_create(name);
918 if (!event_class)
919 return -1;
920
921 ret = add_generic_types(cw, evsel, event_class);
922 if (ret)
923 goto err;
924
925 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
926 ret = add_tracepoint_types(cw, evsel, event_class);
927 if (ret)
928 goto err;
929 }
930
931 if (perf_evsel__is_bpf_output(evsel)) {
932 ret = add_bpf_output_types(cw, event_class);
933 if (ret)
934 goto err;
935 }
936
937 ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);
938 if (ret) {
939 pr("Failed to add event class into stream.\n");
940 goto err;
941 }
942
943 priv = malloc(sizeof(*priv));
944 if (!priv)
945 goto err;
946
947 priv->event_class = event_class;
948 evsel->priv = priv;
949 return 0;
950
951 err:
952 bt_ctf_event_class_put(event_class);
953 pr_err("Failed to add event '%s'.\n", name);
954 return -1;
955 }
956
957 static int setup_events(struct ctf_writer *cw, struct perf_session *session)
958 {
959 struct perf_evlist *evlist = session->evlist;
960 struct perf_evsel *evsel;
961 int ret;
962
963 evlist__for_each(evlist, evsel) {
964 ret = add_event(cw, evsel);
965 if (ret)
966 return ret;
967 }
968 return 0;
969 }
970
971 static void cleanup_events(struct perf_session *session)
972 {
973 struct perf_evlist *evlist = session->evlist;
974 struct perf_evsel *evsel;
975
976 evlist__for_each(evlist, evsel) {
977 struct evsel_priv *priv;
978
979 priv = evsel->priv;
980 bt_ctf_event_class_put(priv->event_class);
981 zfree(&evsel->priv);
982 }
983
984 perf_evlist__delete(evlist);
985 session->evlist = NULL;
986 }
987
988 static int setup_streams(struct ctf_writer *cw, struct perf_session *session)
989 {
990 struct ctf_stream **stream;
991 struct perf_header *ph = &session->header;
992 int ncpus;
993
994 /*
995 * Try to get the number of cpus used in the data file,
996 * if not present fallback to the MAX_CPUS.
997 */
998 ncpus = ph->env.nr_cpus_avail ?: MAX_CPUS;
999
1000 stream = zalloc(sizeof(*stream) * ncpus);
1001 if (!stream) {
1002 pr_err("Failed to allocate streams.\n");
1003 return -ENOMEM;
1004 }
1005
1006 cw->stream = stream;
1007 cw->stream_cnt = ncpus;
1008 return 0;
1009 }
1010
1011 static void free_streams(struct ctf_writer *cw)
1012 {
1013 int cpu;
1014
1015 for (cpu = 0; cpu < cw->stream_cnt; cpu++)
1016 ctf_stream__delete(cw->stream[cpu]);
1017
1018 free(cw->stream);
1019 }
1020
1021 static int ctf_writer__setup_env(struct ctf_writer *cw,
1022 struct perf_session *session)
1023 {
1024 struct perf_header *header = &session->header;
1025 struct bt_ctf_writer *writer = cw->writer;
1026
1027 #define ADD(__n, __v) \
1028 do { \
1029 if (bt_ctf_writer_add_environment_field(writer, __n, __v)) \
1030 return -1; \
1031 } while (0)
1032
1033 ADD("host", header->env.hostname);
1034 ADD("sysname", "Linux");
1035 ADD("release", header->env.os_release);
1036 ADD("version", header->env.version);
1037 ADD("machine", header->env.arch);
1038 ADD("domain", "kernel");
1039 ADD("tracer_name", "perf");
1040
1041 #undef ADD
1042 return 0;
1043 }
1044
1045 static int ctf_writer__setup_clock(struct ctf_writer *cw)
1046 {
1047 struct bt_ctf_clock *clock = cw->clock;
1048
1049 bt_ctf_clock_set_description(clock, "perf clock");
1050
1051 #define SET(__n, __v) \
1052 do { \
1053 if (bt_ctf_clock_set_##__n(clock, __v)) \
1054 return -1; \
1055 } while (0)
1056
1057 SET(frequency, 1000000000);
1058 SET(offset_s, 0);
1059 SET(offset, 0);
1060 SET(precision, 10);
1061 SET(is_absolute, 0);
1062
1063 #undef SET
1064 return 0;
1065 }
1066
1067 static struct bt_ctf_field_type *create_int_type(int size, bool sign, bool hex)
1068 {
1069 struct bt_ctf_field_type *type;
1070
1071 type = bt_ctf_field_type_integer_create(size);
1072 if (!type)
1073 return NULL;
1074
1075 if (sign &&
1076 bt_ctf_field_type_integer_set_signed(type, 1))
1077 goto err;
1078
1079 if (hex &&
1080 bt_ctf_field_type_integer_set_base(type, BT_CTF_INTEGER_BASE_HEXADECIMAL))
1081 goto err;
1082
1083 #if __BYTE_ORDER == __BIG_ENDIAN
1084 bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_BIG_ENDIAN);
1085 #else
1086 bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_LITTLE_ENDIAN);
1087 #endif
1088
1089 pr2("Created type: INTEGER %d-bit %ssigned %s\n",
1090 size, sign ? "un" : "", hex ? "hex" : "");
1091 return type;
1092
1093 err:
1094 bt_ctf_field_type_put(type);
1095 return NULL;
1096 }
1097
1098 static void ctf_writer__cleanup_data(struct ctf_writer *cw)
1099 {
1100 unsigned int i;
1101
1102 for (i = 0; i < ARRAY_SIZE(cw->data.array); i++)
1103 bt_ctf_field_type_put(cw->data.array[i]);
1104 }
1105
1106 static int ctf_writer__init_data(struct ctf_writer *cw)
1107 {
1108 #define CREATE_INT_TYPE(type, size, sign, hex) \
1109 do { \
1110 (type) = create_int_type(size, sign, hex); \
1111 if (!(type)) \
1112 goto err; \
1113 } while (0)
1114
1115 CREATE_INT_TYPE(cw->data.s64, 64, true, false);
1116 CREATE_INT_TYPE(cw->data.u64, 64, false, false);
1117 CREATE_INT_TYPE(cw->data.s32, 32, true, false);
1118 CREATE_INT_TYPE(cw->data.u32, 32, false, false);
1119 CREATE_INT_TYPE(cw->data.u32_hex, 32, false, true);
1120 CREATE_INT_TYPE(cw->data.u64_hex, 64, false, true);
1121
1122 cw->data.string = bt_ctf_field_type_string_create();
1123 if (cw->data.string)
1124 return 0;
1125
1126 err:
1127 ctf_writer__cleanup_data(cw);
1128 pr_err("Failed to create data types.\n");
1129 return -1;
1130 }
1131
1132 static void ctf_writer__cleanup(struct ctf_writer *cw)
1133 {
1134 ctf_writer__cleanup_data(cw);
1135
1136 bt_ctf_clock_put(cw->clock);
1137 free_streams(cw);
1138 bt_ctf_stream_class_put(cw->stream_class);
1139 bt_ctf_writer_put(cw->writer);
1140
1141 /* and NULL all the pointers */
1142 memset(cw, 0, sizeof(*cw));
1143 }
1144
1145 static int ctf_writer__init(struct ctf_writer *cw, const char *path)
1146 {
1147 struct bt_ctf_writer *writer;
1148 struct bt_ctf_stream_class *stream_class;
1149 struct bt_ctf_clock *clock;
1150 struct bt_ctf_field_type *pkt_ctx_type;
1151 int ret;
1152
1153 /* CTF writer */
1154 writer = bt_ctf_writer_create(path);
1155 if (!writer)
1156 goto err;
1157
1158 cw->writer = writer;
1159
1160 /* CTF clock */
1161 clock = bt_ctf_clock_create("perf_clock");
1162 if (!clock) {
1163 pr("Failed to create CTF clock.\n");
1164 goto err_cleanup;
1165 }
1166
1167 cw->clock = clock;
1168
1169 if (ctf_writer__setup_clock(cw)) {
1170 pr("Failed to setup CTF clock.\n");
1171 goto err_cleanup;
1172 }
1173
1174 /* CTF stream class */
1175 stream_class = bt_ctf_stream_class_create("perf_stream");
1176 if (!stream_class) {
1177 pr("Failed to create CTF stream class.\n");
1178 goto err_cleanup;
1179 }
1180
1181 cw->stream_class = stream_class;
1182
1183 /* CTF clock stream setup */
1184 if (bt_ctf_stream_class_set_clock(stream_class, clock)) {
1185 pr("Failed to assign CTF clock to stream class.\n");
1186 goto err_cleanup;
1187 }
1188
1189 if (ctf_writer__init_data(cw))
1190 goto err_cleanup;
1191
1192 /* Add cpu_id for packet context */
1193 pkt_ctx_type = bt_ctf_stream_class_get_packet_context_type(stream_class);
1194 if (!pkt_ctx_type)
1195 goto err_cleanup;
1196
1197 ret = bt_ctf_field_type_structure_add_field(pkt_ctx_type, cw->data.u32, "cpu_id");
1198 bt_ctf_field_type_put(pkt_ctx_type);
1199 if (ret)
1200 goto err_cleanup;
1201
1202 /* CTF clock writer setup */
1203 if (bt_ctf_writer_add_clock(writer, clock)) {
1204 pr("Failed to assign CTF clock to writer.\n");
1205 goto err_cleanup;
1206 }
1207
1208 return 0;
1209
1210 err_cleanup:
1211 ctf_writer__cleanup(cw);
1212 err:
1213 pr_err("Failed to setup CTF writer.\n");
1214 return -1;
1215 }
1216
1217 static int ctf_writer__flush_streams(struct ctf_writer *cw)
1218 {
1219 int cpu, ret = 0;
1220
1221 for (cpu = 0; cpu < cw->stream_cnt && !ret; cpu++)
1222 ret = ctf_stream__flush(cw->stream[cpu]);
1223
1224 return ret;
1225 }
1226
1227 static int convert__config(const char *var, const char *value, void *cb)
1228 {
1229 struct convert *c = cb;
1230
1231 if (!strcmp(var, "convert.queue-size")) {
1232 c->queue_size = perf_config_u64(var, value);
1233 return 0;
1234 }
1235
1236 return 0;
1237 }
1238
1239 int bt_convert__perf2ctf(const char *input, const char *path, bool force)
1240 {
1241 struct perf_session *session;
1242 struct perf_data_file file = {
1243 .path = input,
1244 .mode = PERF_DATA_MODE_READ,
1245 .force = force,
1246 };
1247 struct convert c = {
1248 .tool = {
1249 .sample = process_sample_event,
1250 .mmap = perf_event__process_mmap,
1251 .mmap2 = perf_event__process_mmap2,
1252 .comm = perf_event__process_comm,
1253 .exit = perf_event__process_exit,
1254 .fork = perf_event__process_fork,
1255 .lost = perf_event__process_lost,
1256 .tracing_data = perf_event__process_tracing_data,
1257 .build_id = perf_event__process_build_id,
1258 .ordered_events = true,
1259 .ordering_requires_timestamps = true,
1260 },
1261 };
1262 struct ctf_writer *cw = &c.writer;
1263 int err = -1;
1264
1265 perf_config(convert__config, &c);
1266
1267 /* CTF writer */
1268 if (ctf_writer__init(cw, path))
1269 return -1;
1270
1271 /* perf.data session */
1272 session = perf_session__new(&file, 0, &c.tool);
1273 if (!session)
1274 goto free_writer;
1275
1276 if (c.queue_size) {
1277 ordered_events__set_alloc_size(&session->ordered_events,
1278 c.queue_size);
1279 }
1280
1281 /* CTF writer env/clock setup */
1282 if (ctf_writer__setup_env(cw, session))
1283 goto free_session;
1284
1285 /* CTF events setup */
1286 if (setup_events(cw, session))
1287 goto free_session;
1288
1289 if (setup_streams(cw, session))
1290 goto free_session;
1291
1292 err = perf_session__process_events(session);
1293 if (!err)
1294 err = ctf_writer__flush_streams(cw);
1295 else
1296 pr_err("Error during conversion.\n");
1297
1298 fprintf(stderr,
1299 "[ perf data convert: Converted '%s' into CTF data '%s' ]\n",
1300 file.path, path);
1301
1302 fprintf(stderr,
1303 "[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples) ]\n",
1304 (double) c.events_size / 1024.0 / 1024.0,
1305 c.events_count);
1306
1307 cleanup_events(session);
1308 perf_session__delete(session);
1309 ctf_writer__cleanup(cw);
1310
1311 return err;
1312
1313 free_session:
1314 perf_session__delete(session);
1315 free_writer:
1316 ctf_writer__cleanup(cw);
1317 pr_err("Error during conversion setup.\n");
1318 return err;
1319 }
Linux kernel - Deliverables
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