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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * CTF writing support via babeltrace.
4 *
5 * Copyright (C) 2014, Jiri Olsa <jolsa@redhat.com>
6 * Copyright (C) 2014, Sebastian Andrzej Siewior <bigeasy@linutronix.de>
7 */
8
9#include <errno.h>
10#include <inttypes.h>
11#include <linux/compiler.h>
12#include <linux/kernel.h>
13#include <linux/zalloc.h>
14#include <babeltrace/ctf-writer/writer.h>
15#include <babeltrace/ctf-writer/clock.h>
16#include <babeltrace/ctf-writer/stream.h>
17#include <babeltrace/ctf-writer/event.h>
18#include <babeltrace/ctf-writer/event-types.h>
19#include <babeltrace/ctf-writer/event-fields.h>
20#include <babeltrace/ctf-ir/utils.h>
21#include <babeltrace/ctf/events.h>
22#include <traceevent/event-parse.h>
23#include "asm/bug.h"
24#include "data-convert-bt.h"
25#include "session.h"
26#include "debug.h"
27#include "tool.h"
28#include "evlist.h"
29#include "evsel.h"
30#include "machine.h"
31#include "config.h"
32#include <linux/ctype.h>
33#include <linux/err.h>
34
35#define pr_N(n, fmt, ...) \
36 eprintf(n, debug_data_convert, fmt, ##__VA_ARGS__)
37
38#define pr(fmt, ...) pr_N(1, pr_fmt(fmt), ##__VA_ARGS__)
39#define pr2(fmt, ...) pr_N(2, pr_fmt(fmt), ##__VA_ARGS__)
40
41#define pr_time2(t, fmt, ...) pr_time_N(2, debug_data_convert, t, pr_fmt(fmt), ##__VA_ARGS__)
42
43struct evsel_priv {
44 struct bt_ctf_event_class *event_class;
45};
46
47#define MAX_CPUS 4096
48
49struct ctf_stream {
50 struct bt_ctf_stream *stream;
51 int cpu;
52 u32 count;
53};
54
55struct ctf_writer {
56 /* writer primitives */
57 struct bt_ctf_writer *writer;
58 struct ctf_stream **stream;
59 int stream_cnt;
60 struct bt_ctf_stream_class *stream_class;
61 struct bt_ctf_clock *clock;
62
63 /* data types */
64 union {
65 struct {
66 struct bt_ctf_field_type *s64;
67 struct bt_ctf_field_type *u64;
68 struct bt_ctf_field_type *s32;
69 struct bt_ctf_field_type *u32;
70 struct bt_ctf_field_type *string;
71 struct bt_ctf_field_type *u32_hex;
72 struct bt_ctf_field_type *u64_hex;
73 };
74 struct bt_ctf_field_type *array[6];
75 } data;
76 struct bt_ctf_event_class *comm_class;
77 struct bt_ctf_event_class *exit_class;
78 struct bt_ctf_event_class *fork_class;
79 struct bt_ctf_event_class *mmap_class;
80 struct bt_ctf_event_class *mmap2_class;
81};
82
83struct convert {
84 struct perf_tool tool;
85 struct ctf_writer writer;
86
87 u64 events_size;
88 u64 events_count;
89 u64 non_sample_count;
90
91 /* Ordered events configured queue size. */
92 u64 queue_size;
93};
94
95static int value_set(struct bt_ctf_field_type *type,
96 struct bt_ctf_event *event,
97 const char *name, u64 val)
98{
99 struct bt_ctf_field *field;
100 bool sign = bt_ctf_field_type_integer_get_signed(type);
101 int ret;
102
103 field = bt_ctf_field_create(type);
104 if (!field) {
105 pr_err("failed to create a field %s\n", name);
106 return -1;
107 }
108
109 if (sign) {
110 ret = bt_ctf_field_signed_integer_set_value(field, val);
111 if (ret) {
112 pr_err("failed to set field value %s\n", name);
113 goto err;
114 }
115 } else {
116 ret = bt_ctf_field_unsigned_integer_set_value(field, val);
117 if (ret) {
118 pr_err("failed to set field value %s\n", name);
119 goto err;
120 }
121 }
122
123 ret = bt_ctf_event_set_payload(event, name, field);
124 if (ret) {
125 pr_err("failed to set payload %s\n", name);
126 goto err;
127 }
128
129 pr2(" SET [%s = %" PRIu64 "]\n", name, val);
130
131err:
132 bt_ctf_field_put(field);
133 return ret;
134}
135
136#define __FUNC_VALUE_SET(_name, _val_type) \
137static __maybe_unused int value_set_##_name(struct ctf_writer *cw, \
138 struct bt_ctf_event *event, \
139 const char *name, \
140 _val_type val) \
141{ \
142 struct bt_ctf_field_type *type = cw->data._name; \
143 return value_set(type, event, name, (u64) val); \
144}
145
146#define FUNC_VALUE_SET(_name) __FUNC_VALUE_SET(_name, _name)
147
148FUNC_VALUE_SET(s32)
149FUNC_VALUE_SET(u32)
150FUNC_VALUE_SET(s64)
151FUNC_VALUE_SET(u64)
152__FUNC_VALUE_SET(u64_hex, u64)
153
154static int string_set_value(struct bt_ctf_field *field, const char *string);
155static __maybe_unused int
156value_set_string(struct ctf_writer *cw, struct bt_ctf_event *event,
157 const char *name, const char *string)
158{
159 struct bt_ctf_field_type *type = cw->data.string;
160 struct bt_ctf_field *field;
161 int ret = 0;
162
163 field = bt_ctf_field_create(type);
164 if (!field) {
165 pr_err("failed to create a field %s\n", name);
166 return -1;
167 }
168
169 ret = string_set_value(field, string);
170 if (ret) {
171 pr_err("failed to set value %s\n", name);
172 goto err_put_field;
173 }
174
175 ret = bt_ctf_event_set_payload(event, name, field);
176 if (ret)
177 pr_err("failed to set payload %s\n", name);
178
179err_put_field:
180 bt_ctf_field_put(field);
181 return ret;
182}
183
184static struct bt_ctf_field_type*
185get_tracepoint_field_type(struct ctf_writer *cw, struct tep_format_field *field)
186{
187 unsigned long flags = field->flags;
188
189 if (flags & TEP_FIELD_IS_STRING)
190 return cw->data.string;
191
192 if (!(flags & TEP_FIELD_IS_SIGNED)) {
193 /* unsigned long are mostly pointers */
194 if (flags & TEP_FIELD_IS_LONG || flags & TEP_FIELD_IS_POINTER)
195 return cw->data.u64_hex;
196 }
197
198 if (flags & TEP_FIELD_IS_SIGNED) {
199 if (field->size == 8)
200 return cw->data.s64;
201 else
202 return cw->data.s32;
203 }
204
205 if (field->size == 8)
206 return cw->data.u64;
207 else
208 return cw->data.u32;
209}
210
211static unsigned long long adjust_signedness(unsigned long long value_int, int size)
212{
213 unsigned long long value_mask;
214
215 /*
216 * value_mask = (1 << (size * 8 - 1)) - 1.
217 * Directly set value_mask for code readers.
218 */
219 switch (size) {
220 case 1:
221 value_mask = 0x7fULL;
222 break;
223 case 2:
224 value_mask = 0x7fffULL;
225 break;
226 case 4:
227 value_mask = 0x7fffffffULL;
228 break;
229 case 8:
230 /*
231 * For 64 bit value, return it self. There is no need
232 * to fill high bit.
233 */
234 /* Fall through */
235 default:
236 /* BUG! */
237 return value_int;
238 }
239
240 /* If it is a positive value, don't adjust. */
241 if ((value_int & (~0ULL - value_mask)) == 0)
242 return value_int;
243
244 /* Fill upper part of value_int with 1 to make it a negative long long. */
245 return (value_int & value_mask) | ~value_mask;
246}
247
248static int string_set_value(struct bt_ctf_field *field, const char *string)
249{
250 char *buffer = NULL;
251 size_t len = strlen(string), i, p;
252 int err;
253
254 for (i = p = 0; i < len; i++, p++) {
255 if (isprint(string[i])) {
256 if (!buffer)
257 continue;
258 buffer[p] = string[i];
259 } else {
260 char numstr[5];
261
262 snprintf(numstr, sizeof(numstr), "\\x%02x",
263 (unsigned int)(string[i]) & 0xff);
264
265 if (!buffer) {
266 buffer = zalloc(i + (len - i) * 4 + 2);
267 if (!buffer) {
268 pr_err("failed to set unprintable string '%s'\n", string);
269 return bt_ctf_field_string_set_value(field, "UNPRINTABLE-STRING");
270 }
271 if (i > 0)
272 strncpy(buffer, string, i);
273 }
274 memcpy(buffer + p, numstr, 4);
275 p += 3;
276 }
277 }
278
279 if (!buffer)
280 return bt_ctf_field_string_set_value(field, string);
281 err = bt_ctf_field_string_set_value(field, buffer);
282 free(buffer);
283 return err;
284}
285
286static int add_tracepoint_field_value(struct ctf_writer *cw,
287 struct bt_ctf_event_class *event_class,
288 struct bt_ctf_event *event,
289 struct perf_sample *sample,
290 struct tep_format_field *fmtf)
291{
292 struct bt_ctf_field_type *type;
293 struct bt_ctf_field *array_field;
294 struct bt_ctf_field *field;
295 const char *name = fmtf->name;
296 void *data = sample->raw_data;
297 unsigned long flags = fmtf->flags;
298 unsigned int n_items;
299 unsigned int i;
300 unsigned int offset;
301 unsigned int len;
302 int ret;
303
304 name = fmtf->alias;
305 offset = fmtf->offset;
306 len = fmtf->size;
307 if (flags & TEP_FIELD_IS_STRING)
308 flags &= ~TEP_FIELD_IS_ARRAY;
309
310 if (flags & TEP_FIELD_IS_DYNAMIC) {
311 unsigned long long tmp_val;
312
313 tmp_val = tep_read_number(fmtf->event->tep,
314 data + offset, len);
315 offset = tmp_val;
316 len = offset >> 16;
317 offset &= 0xffff;
318 }
319
320 if (flags & TEP_FIELD_IS_ARRAY) {
321
322 type = bt_ctf_event_class_get_field_by_name(
323 event_class, name);
324 array_field = bt_ctf_field_create(type);
325 bt_ctf_field_type_put(type);
326 if (!array_field) {
327 pr_err("Failed to create array type %s\n", name);
328 return -1;
329 }
330
331 len = fmtf->size / fmtf->arraylen;
332 n_items = fmtf->arraylen;
333 } else {
334 n_items = 1;
335 array_field = NULL;
336 }
337
338 type = get_tracepoint_field_type(cw, fmtf);
339
340 for (i = 0; i < n_items; i++) {
341 if (flags & TEP_FIELD_IS_ARRAY)
342 field = bt_ctf_field_array_get_field(array_field, i);
343 else
344 field = bt_ctf_field_create(type);
345
346 if (!field) {
347 pr_err("failed to create a field %s\n", name);
348 return -1;
349 }
350
351 if (flags & TEP_FIELD_IS_STRING)
352 ret = string_set_value(field, data + offset + i * len);
353 else {
354 unsigned long long value_int;
355
356 value_int = tep_read_number(
357 fmtf->event->tep,
358 data + offset + i * len, len);
359
360 if (!(flags & TEP_FIELD_IS_SIGNED))
361 ret = bt_ctf_field_unsigned_integer_set_value(
362 field, value_int);
363 else
364 ret = bt_ctf_field_signed_integer_set_value(
365 field, adjust_signedness(value_int, len));
366 }
367
368 if (ret) {
369 pr_err("failed to set file value %s\n", name);
370 goto err_put_field;
371 }
372 if (!(flags & TEP_FIELD_IS_ARRAY)) {
373 ret = bt_ctf_event_set_payload(event, name, field);
374 if (ret) {
375 pr_err("failed to set payload %s\n", name);
376 goto err_put_field;
377 }
378 }
379 bt_ctf_field_put(field);
380 }
381 if (flags & TEP_FIELD_IS_ARRAY) {
382 ret = bt_ctf_event_set_payload(event, name, array_field);
383 if (ret) {
384 pr_err("Failed add payload array %s\n", name);
385 return -1;
386 }
387 bt_ctf_field_put(array_field);
388 }
389 return 0;
390
391err_put_field:
392 bt_ctf_field_put(field);
393 return -1;
394}
395
396static int add_tracepoint_fields_values(struct ctf_writer *cw,
397 struct bt_ctf_event_class *event_class,
398 struct bt_ctf_event *event,
399 struct tep_format_field *fields,
400 struct perf_sample *sample)
401{
402 struct tep_format_field *field;
403 int ret;
404
405 for (field = fields; field; field = field->next) {
406 ret = add_tracepoint_field_value(cw, event_class, event, sample,
407 field);
408 if (ret)
409 return -1;
410 }
411 return 0;
412}
413
414static int add_tracepoint_values(struct ctf_writer *cw,
415 struct bt_ctf_event_class *event_class,
416 struct bt_ctf_event *event,
417 struct evsel *evsel,
418 struct perf_sample *sample)
419{
420 struct tep_format_field *common_fields = evsel->tp_format->format.common_fields;
421 struct tep_format_field *fields = evsel->tp_format->format.fields;
422 int ret;
423
424 ret = add_tracepoint_fields_values(cw, event_class, event,
425 common_fields, sample);
426 if (!ret)
427 ret = add_tracepoint_fields_values(cw, event_class, event,
428 fields, sample);
429
430 return ret;
431}
432
433static int
434add_bpf_output_values(struct bt_ctf_event_class *event_class,
435 struct bt_ctf_event *event,
436 struct perf_sample *sample)
437{
438 struct bt_ctf_field_type *len_type, *seq_type;
439 struct bt_ctf_field *len_field, *seq_field;
440 unsigned int raw_size = sample->raw_size;
441 unsigned int nr_elements = raw_size / sizeof(u32);
442 unsigned int i;
443 int ret;
444
445 if (nr_elements * sizeof(u32) != raw_size)
446 pr_warning("Incorrect raw_size (%u) in bpf output event, skip %zu bytes\n",
447 raw_size, nr_elements * sizeof(u32) - raw_size);
448
449 len_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_len");
450 len_field = bt_ctf_field_create(len_type);
451 if (!len_field) {
452 pr_err("failed to create 'raw_len' for bpf output event\n");
453 ret = -1;
454 goto put_len_type;
455 }
456
457 ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
458 if (ret) {
459 pr_err("failed to set field value for raw_len\n");
460 goto put_len_field;
461 }
462 ret = bt_ctf_event_set_payload(event, "raw_len", len_field);
463 if (ret) {
464 pr_err("failed to set payload to raw_len\n");
465 goto put_len_field;
466 }
467
468 seq_type = bt_ctf_event_class_get_field_by_name(event_class, "raw_data");
469 seq_field = bt_ctf_field_create(seq_type);
470 if (!seq_field) {
471 pr_err("failed to create 'raw_data' for bpf output event\n");
472 ret = -1;
473 goto put_seq_type;
474 }
475
476 ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
477 if (ret) {
478 pr_err("failed to set length of 'raw_data'\n");
479 goto put_seq_field;
480 }
481
482 for (i = 0; i < nr_elements; i++) {
483 struct bt_ctf_field *elem_field =
484 bt_ctf_field_sequence_get_field(seq_field, i);
485
486 ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
487 ((u32 *)(sample->raw_data))[i]);
488
489 bt_ctf_field_put(elem_field);
490 if (ret) {
491 pr_err("failed to set raw_data[%d]\n", i);
492 goto put_seq_field;
493 }
494 }
495
496 ret = bt_ctf_event_set_payload(event, "raw_data", seq_field);
497 if (ret)
498 pr_err("failed to set payload for raw_data\n");
499
500put_seq_field:
501 bt_ctf_field_put(seq_field);
502put_seq_type:
503 bt_ctf_field_type_put(seq_type);
504put_len_field:
505 bt_ctf_field_put(len_field);
506put_len_type:
507 bt_ctf_field_type_put(len_type);
508 return ret;
509}
510
511static int
512add_callchain_output_values(struct bt_ctf_event_class *event_class,
513 struct bt_ctf_event *event,
514 struct ip_callchain *callchain)
515{
516 struct bt_ctf_field_type *len_type, *seq_type;
517 struct bt_ctf_field *len_field, *seq_field;
518 unsigned int nr_elements = callchain->nr;
519 unsigned int i;
520 int ret;
521
522 len_type = bt_ctf_event_class_get_field_by_name(
523 event_class, "perf_callchain_size");
524 len_field = bt_ctf_field_create(len_type);
525 if (!len_field) {
526 pr_err("failed to create 'perf_callchain_size' for callchain output event\n");
527 ret = -1;
528 goto put_len_type;
529 }
530
531 ret = bt_ctf_field_unsigned_integer_set_value(len_field, nr_elements);
532 if (ret) {
533 pr_err("failed to set field value for perf_callchain_size\n");
534 goto put_len_field;
535 }
536 ret = bt_ctf_event_set_payload(event, "perf_callchain_size", len_field);
537 if (ret) {
538 pr_err("failed to set payload to perf_callchain_size\n");
539 goto put_len_field;
540 }
541
542 seq_type = bt_ctf_event_class_get_field_by_name(
543 event_class, "perf_callchain");
544 seq_field = bt_ctf_field_create(seq_type);
545 if (!seq_field) {
546 pr_err("failed to create 'perf_callchain' for callchain output event\n");
547 ret = -1;
548 goto put_seq_type;
549 }
550
551 ret = bt_ctf_field_sequence_set_length(seq_field, len_field);
552 if (ret) {
553 pr_err("failed to set length of 'perf_callchain'\n");
554 goto put_seq_field;
555 }
556
557 for (i = 0; i < nr_elements; i++) {
558 struct bt_ctf_field *elem_field =
559 bt_ctf_field_sequence_get_field(seq_field, i);
560
561 ret = bt_ctf_field_unsigned_integer_set_value(elem_field,
562 ((u64 *)(callchain->ips))[i]);
563
564 bt_ctf_field_put(elem_field);
565 if (ret) {
566 pr_err("failed to set callchain[%d]\n", i);
567 goto put_seq_field;
568 }
569 }
570
571 ret = bt_ctf_event_set_payload(event, "perf_callchain", seq_field);
572 if (ret)
573 pr_err("failed to set payload for raw_data\n");
574
575put_seq_field:
576 bt_ctf_field_put(seq_field);
577put_seq_type:
578 bt_ctf_field_type_put(seq_type);
579put_len_field:
580 bt_ctf_field_put(len_field);
581put_len_type:
582 bt_ctf_field_type_put(len_type);
583 return ret;
584}
585
586static int add_generic_values(struct ctf_writer *cw,
587 struct bt_ctf_event *event,
588 struct evsel *evsel,
589 struct perf_sample *sample)
590{
591 u64 type = evsel->core.attr.sample_type;
592 int ret;
593
594 /*
595 * missing:
596 * PERF_SAMPLE_TIME - not needed as we have it in
597 * ctf event header
598 * PERF_SAMPLE_READ - TODO
599 * PERF_SAMPLE_RAW - tracepoint fields are handled separately
600 * PERF_SAMPLE_BRANCH_STACK - TODO
601 * PERF_SAMPLE_REGS_USER - TODO
602 * PERF_SAMPLE_STACK_USER - TODO
603 */
604
605 if (type & PERF_SAMPLE_IP) {
606 ret = value_set_u64_hex(cw, event, "perf_ip", sample->ip);
607 if (ret)
608 return -1;
609 }
610
611 if (type & PERF_SAMPLE_TID) {
612 ret = value_set_s32(cw, event, "perf_tid", sample->tid);
613 if (ret)
614 return -1;
615
616 ret = value_set_s32(cw, event, "perf_pid", sample->pid);
617 if (ret)
618 return -1;
619 }
620
621 if ((type & PERF_SAMPLE_ID) ||
622 (type & PERF_SAMPLE_IDENTIFIER)) {
623 ret = value_set_u64(cw, event, "perf_id", sample->id);
624 if (ret)
625 return -1;
626 }
627
628 if (type & PERF_SAMPLE_STREAM_ID) {
629 ret = value_set_u64(cw, event, "perf_stream_id", sample->stream_id);
630 if (ret)
631 return -1;
632 }
633
634 if (type & PERF_SAMPLE_PERIOD) {
635 ret = value_set_u64(cw, event, "perf_period", sample->period);
636 if (ret)
637 return -1;
638 }
639
640 if (type & PERF_SAMPLE_WEIGHT) {
641 ret = value_set_u64(cw, event, "perf_weight", sample->weight);
642 if (ret)
643 return -1;
644 }
645
646 if (type & PERF_SAMPLE_DATA_SRC) {
647 ret = value_set_u64(cw, event, "perf_data_src",
648 sample->data_src);
649 if (ret)
650 return -1;
651 }
652
653 if (type & PERF_SAMPLE_TRANSACTION) {
654 ret = value_set_u64(cw, event, "perf_transaction",
655 sample->transaction);
656 if (ret)
657 return -1;
658 }
659
660 return 0;
661}
662
663static int ctf_stream__flush(struct ctf_stream *cs)
664{
665 int err = 0;
666
667 if (cs) {
668 err = bt_ctf_stream_flush(cs->stream);
669 if (err)
670 pr_err("CTF stream %d flush failed\n", cs->cpu);
671
672 pr("Flush stream for cpu %d (%u samples)\n",
673 cs->cpu, cs->count);
674
675 cs->count = 0;
676 }
677
678 return err;
679}
680
681static struct ctf_stream *ctf_stream__create(struct ctf_writer *cw, int cpu)
682{
683 struct ctf_stream *cs;
684 struct bt_ctf_field *pkt_ctx = NULL;
685 struct bt_ctf_field *cpu_field = NULL;
686 struct bt_ctf_stream *stream = NULL;
687 int ret;
688
689 cs = zalloc(sizeof(*cs));
690 if (!cs) {
691 pr_err("Failed to allocate ctf stream\n");
692 return NULL;
693 }
694
695 stream = bt_ctf_writer_create_stream(cw->writer, cw->stream_class);
696 if (!stream) {
697 pr_err("Failed to create CTF stream\n");
698 goto out;
699 }
700
701 pkt_ctx = bt_ctf_stream_get_packet_context(stream);
702 if (!pkt_ctx) {
703 pr_err("Failed to obtain packet context\n");
704 goto out;
705 }
706
707 cpu_field = bt_ctf_field_structure_get_field(pkt_ctx, "cpu_id");
708 bt_ctf_field_put(pkt_ctx);
709 if (!cpu_field) {
710 pr_err("Failed to obtain cpu field\n");
711 goto out;
712 }
713
714 ret = bt_ctf_field_unsigned_integer_set_value(cpu_field, (u32) cpu);
715 if (ret) {
716 pr_err("Failed to update CPU number\n");
717 goto out;
718 }
719
720 bt_ctf_field_put(cpu_field);
721
722 cs->cpu = cpu;
723 cs->stream = stream;
724 return cs;
725
726out:
727 if (cpu_field)
728 bt_ctf_field_put(cpu_field);
729 if (stream)
730 bt_ctf_stream_put(stream);
731
732 free(cs);
733 return NULL;
734}
735
736static void ctf_stream__delete(struct ctf_stream *cs)
737{
738 if (cs) {
739 bt_ctf_stream_put(cs->stream);
740 free(cs);
741 }
742}
743
744static struct ctf_stream *ctf_stream(struct ctf_writer *cw, int cpu)
745{
746 struct ctf_stream *cs = cw->stream[cpu];
747
748 if (!cs) {
749 cs = ctf_stream__create(cw, cpu);
750 cw->stream[cpu] = cs;
751 }
752
753 return cs;
754}
755
756static int get_sample_cpu(struct ctf_writer *cw, struct perf_sample *sample,
757 struct evsel *evsel)
758{
759 int cpu = 0;
760
761 if (evsel->core.attr.sample_type & PERF_SAMPLE_CPU)
762 cpu = sample->cpu;
763
764 if (cpu > cw->stream_cnt) {
765 pr_err("Event was recorded for CPU %d, limit is at %d.\n",
766 cpu, cw->stream_cnt);
767 cpu = 0;
768 }
769
770 return cpu;
771}
772
773#define STREAM_FLUSH_COUNT 100000
774
775/*
776 * Currently we have no other way to determine the
777 * time for the stream flush other than keep track
778 * of the number of events and check it against
779 * threshold.
780 */
781static bool is_flush_needed(struct ctf_stream *cs)
782{
783 return cs->count >= STREAM_FLUSH_COUNT;
784}
785
786static int process_sample_event(struct perf_tool *tool,
787 union perf_event *_event,
788 struct perf_sample *sample,
789 struct evsel *evsel,
790 struct machine *machine __maybe_unused)
791{
792 struct convert *c = container_of(tool, struct convert, tool);
793 struct evsel_priv *priv = evsel->priv;
794 struct ctf_writer *cw = &c->writer;
795 struct ctf_stream *cs;
796 struct bt_ctf_event_class *event_class;
797 struct bt_ctf_event *event;
798 int ret;
799 unsigned long type = evsel->core.attr.sample_type;
800
801 if (WARN_ONCE(!priv, "Failed to setup all events.\n"))
802 return 0;
803
804 event_class = priv->event_class;
805
806 /* update stats */
807 c->events_count++;
808 c->events_size += _event->header.size;
809
810 pr_time2(sample->time, "sample %" PRIu64 "\n", c->events_count);
811
812 event = bt_ctf_event_create(event_class);
813 if (!event) {
814 pr_err("Failed to create an CTF event\n");
815 return -1;
816 }
817
818 bt_ctf_clock_set_time(cw->clock, sample->time);
819
820 ret = add_generic_values(cw, event, evsel, sample);
821 if (ret)
822 return -1;
823
824 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
825 ret = add_tracepoint_values(cw, event_class, event,
826 evsel, sample);
827 if (ret)
828 return -1;
829 }
830
831 if (type & PERF_SAMPLE_CALLCHAIN) {
832 ret = add_callchain_output_values(event_class,
833 event, sample->callchain);
834 if (ret)
835 return -1;
836 }
837
838 if (perf_evsel__is_bpf_output(evsel)) {
839 ret = add_bpf_output_values(event_class, event, sample);
840 if (ret)
841 return -1;
842 }
843
844 cs = ctf_stream(cw, get_sample_cpu(cw, sample, evsel));
845 if (cs) {
846 if (is_flush_needed(cs))
847 ctf_stream__flush(cs);
848
849 cs->count++;
850 bt_ctf_stream_append_event(cs->stream, event);
851 }
852
853 bt_ctf_event_put(event);
854 return cs ? 0 : -1;
855}
856
857#define __NON_SAMPLE_SET_FIELD(_name, _type, _field) \
858do { \
859 ret = value_set_##_type(cw, event, #_field, _event->_name._field);\
860 if (ret) \
861 return -1; \
862} while(0)
863
864#define __FUNC_PROCESS_NON_SAMPLE(_name, body) \
865static int process_##_name##_event(struct perf_tool *tool, \
866 union perf_event *_event, \
867 struct perf_sample *sample, \
868 struct machine *machine) \
869{ \
870 struct convert *c = container_of(tool, struct convert, tool);\
871 struct ctf_writer *cw = &c->writer; \
872 struct bt_ctf_event_class *event_class = cw->_name##_class;\
873 struct bt_ctf_event *event; \
874 struct ctf_stream *cs; \
875 int ret; \
876 \
877 c->non_sample_count++; \
878 c->events_size += _event->header.size; \
879 event = bt_ctf_event_create(event_class); \
880 if (!event) { \
881 pr_err("Failed to create an CTF event\n"); \
882 return -1; \
883 } \
884 \
885 bt_ctf_clock_set_time(cw->clock, sample->time); \
886 body \
887 cs = ctf_stream(cw, 0); \
888 if (cs) { \
889 if (is_flush_needed(cs)) \
890 ctf_stream__flush(cs); \
891 \
892 cs->count++; \
893 bt_ctf_stream_append_event(cs->stream, event); \
894 } \
895 bt_ctf_event_put(event); \
896 \
897 return perf_event__process_##_name(tool, _event, sample, machine);\
898}
899
900__FUNC_PROCESS_NON_SAMPLE(comm,
901 __NON_SAMPLE_SET_FIELD(comm, u32, pid);
902 __NON_SAMPLE_SET_FIELD(comm, u32, tid);
903 __NON_SAMPLE_SET_FIELD(comm, string, comm);
904)
905__FUNC_PROCESS_NON_SAMPLE(fork,
906 __NON_SAMPLE_SET_FIELD(fork, u32, pid);
907 __NON_SAMPLE_SET_FIELD(fork, u32, ppid);
908 __NON_SAMPLE_SET_FIELD(fork, u32, tid);
909 __NON_SAMPLE_SET_FIELD(fork, u32, ptid);
910 __NON_SAMPLE_SET_FIELD(fork, u64, time);
911)
912
913__FUNC_PROCESS_NON_SAMPLE(exit,
914 __NON_SAMPLE_SET_FIELD(fork, u32, pid);
915 __NON_SAMPLE_SET_FIELD(fork, u32, ppid);
916 __NON_SAMPLE_SET_FIELD(fork, u32, tid);
917 __NON_SAMPLE_SET_FIELD(fork, u32, ptid);
918 __NON_SAMPLE_SET_FIELD(fork, u64, time);
919)
920__FUNC_PROCESS_NON_SAMPLE(mmap,
921 __NON_SAMPLE_SET_FIELD(mmap, u32, pid);
922 __NON_SAMPLE_SET_FIELD(mmap, u32, tid);
923 __NON_SAMPLE_SET_FIELD(mmap, u64_hex, start);
924 __NON_SAMPLE_SET_FIELD(mmap, string, filename);
925)
926__FUNC_PROCESS_NON_SAMPLE(mmap2,
927 __NON_SAMPLE_SET_FIELD(mmap2, u32, pid);
928 __NON_SAMPLE_SET_FIELD(mmap2, u32, tid);
929 __NON_SAMPLE_SET_FIELD(mmap2, u64_hex, start);
930 __NON_SAMPLE_SET_FIELD(mmap2, string, filename);
931)
932#undef __NON_SAMPLE_SET_FIELD
933#undef __FUNC_PROCESS_NON_SAMPLE
934
935/* If dup < 0, add a prefix. Else, add _dupl_X suffix. */
936static char *change_name(char *name, char *orig_name, int dup)
937{
938 char *new_name = NULL;
939 size_t len;
940
941 if (!name)
942 name = orig_name;
943
944 if (dup >= 10)
945 goto out;
946 /*
947 * Add '_' prefix to potential keywork. According to
948 * Mathieu Desnoyers (https://lkml.org/lkml/2015/1/23/652),
949 * futher CTF spec updating may require us to use '$'.
950 */
951 if (dup < 0)
952 len = strlen(name) + sizeof("_");
953 else
954 len = strlen(orig_name) + sizeof("_dupl_X");
955
956 new_name = malloc(len);
957 if (!new_name)
958 goto out;
959
960 if (dup < 0)
961 snprintf(new_name, len, "_%s", name);
962 else
963 snprintf(new_name, len, "%s_dupl_%d", orig_name, dup);
964
965out:
966 if (name != orig_name)
967 free(name);
968 return new_name;
969}
970
971static int event_class_add_field(struct bt_ctf_event_class *event_class,
972 struct bt_ctf_field_type *type,
973 struct tep_format_field *field)
974{
975 struct bt_ctf_field_type *t = NULL;
976 char *name;
977 int dup = 1;
978 int ret;
979
980 /* alias was already assigned */
981 if (field->alias != field->name)
982 return bt_ctf_event_class_add_field(event_class, type,
983 (char *)field->alias);
984
985 name = field->name;
986
987 /* If 'name' is a keywork, add prefix. */
988 if (bt_ctf_validate_identifier(name))
989 name = change_name(name, field->name, -1);
990
991 if (!name) {
992 pr_err("Failed to fix invalid identifier.");
993 return -1;
994 }
995 while ((t = bt_ctf_event_class_get_field_by_name(event_class, name))) {
996 bt_ctf_field_type_put(t);
997 name = change_name(name, field->name, dup++);
998 if (!name) {
999 pr_err("Failed to create dup name for '%s'\n", field->name);
1000 return -1;
1001 }
1002 }
1003
1004 ret = bt_ctf_event_class_add_field(event_class, type, name);
1005 if (!ret)
1006 field->alias = name;
1007
1008 return ret;
1009}
1010
1011static int add_tracepoint_fields_types(struct ctf_writer *cw,
1012 struct tep_format_field *fields,
1013 struct bt_ctf_event_class *event_class)
1014{
1015 struct tep_format_field *field;
1016 int ret;
1017
1018 for (field = fields; field; field = field->next) {
1019 struct bt_ctf_field_type *type;
1020 unsigned long flags = field->flags;
1021
1022 pr2(" field '%s'\n", field->name);
1023
1024 type = get_tracepoint_field_type(cw, field);
1025 if (!type)
1026 return -1;
1027
1028 /*
1029 * A string is an array of chars. For this we use the string
1030 * type and don't care that it is an array. What we don't
1031 * support is an array of strings.
1032 */
1033 if (flags & TEP_FIELD_IS_STRING)
1034 flags &= ~TEP_FIELD_IS_ARRAY;
1035
1036 if (flags & TEP_FIELD_IS_ARRAY)
1037 type = bt_ctf_field_type_array_create(type, field->arraylen);
1038
1039 ret = event_class_add_field(event_class, type, field);
1040
1041 if (flags & TEP_FIELD_IS_ARRAY)
1042 bt_ctf_field_type_put(type);
1043
1044 if (ret) {
1045 pr_err("Failed to add field '%s': %d\n",
1046 field->name, ret);
1047 return -1;
1048 }
1049 }
1050
1051 return 0;
1052}
1053
1054static int add_tracepoint_types(struct ctf_writer *cw,
1055 struct evsel *evsel,
1056 struct bt_ctf_event_class *class)
1057{
1058 struct tep_format_field *common_fields = evsel->tp_format->format.common_fields;
1059 struct tep_format_field *fields = evsel->tp_format->format.fields;
1060 int ret;
1061
1062 ret = add_tracepoint_fields_types(cw, common_fields, class);
1063 if (!ret)
1064 ret = add_tracepoint_fields_types(cw, fields, class);
1065
1066 return ret;
1067}
1068
1069static int add_bpf_output_types(struct ctf_writer *cw,
1070 struct bt_ctf_event_class *class)
1071{
1072 struct bt_ctf_field_type *len_type = cw->data.u32;
1073 struct bt_ctf_field_type *seq_base_type = cw->data.u32_hex;
1074 struct bt_ctf_field_type *seq_type;
1075 int ret;
1076
1077 ret = bt_ctf_event_class_add_field(class, len_type, "raw_len");
1078 if (ret)
1079 return ret;
1080
1081 seq_type = bt_ctf_field_type_sequence_create(seq_base_type, "raw_len");
1082 if (!seq_type)
1083 return -1;
1084
1085 return bt_ctf_event_class_add_field(class, seq_type, "raw_data");
1086}
1087
1088static int add_generic_types(struct ctf_writer *cw, struct evsel *evsel,
1089 struct bt_ctf_event_class *event_class)
1090{
1091 u64 type = evsel->core.attr.sample_type;
1092
1093 /*
1094 * missing:
1095 * PERF_SAMPLE_TIME - not needed as we have it in
1096 * ctf event header
1097 * PERF_SAMPLE_READ - TODO
1098 * PERF_SAMPLE_CALLCHAIN - TODO
1099 * PERF_SAMPLE_RAW - tracepoint fields and BPF output
1100 * are handled separately
1101 * PERF_SAMPLE_BRANCH_STACK - TODO
1102 * PERF_SAMPLE_REGS_USER - TODO
1103 * PERF_SAMPLE_STACK_USER - TODO
1104 */
1105
1106#define ADD_FIELD(cl, t, n) \
1107 do { \
1108 pr2(" field '%s'\n", n); \
1109 if (bt_ctf_event_class_add_field(cl, t, n)) { \
1110 pr_err("Failed to add field '%s';\n", n); \
1111 return -1; \
1112 } \
1113 } while (0)
1114
1115 if (type & PERF_SAMPLE_IP)
1116 ADD_FIELD(event_class, cw->data.u64_hex, "perf_ip");
1117
1118 if (type & PERF_SAMPLE_TID) {
1119 ADD_FIELD(event_class, cw->data.s32, "perf_tid");
1120 ADD_FIELD(event_class, cw->data.s32, "perf_pid");
1121 }
1122
1123 if ((type & PERF_SAMPLE_ID) ||
1124 (type & PERF_SAMPLE_IDENTIFIER))
1125 ADD_FIELD(event_class, cw->data.u64, "perf_id");
1126
1127 if (type & PERF_SAMPLE_STREAM_ID)
1128 ADD_FIELD(event_class, cw->data.u64, "perf_stream_id");
1129
1130 if (type & PERF_SAMPLE_PERIOD)
1131 ADD_FIELD(event_class, cw->data.u64, "perf_period");
1132
1133 if (type & PERF_SAMPLE_WEIGHT)
1134 ADD_FIELD(event_class, cw->data.u64, "perf_weight");
1135
1136 if (type & PERF_SAMPLE_DATA_SRC)
1137 ADD_FIELD(event_class, cw->data.u64, "perf_data_src");
1138
1139 if (type & PERF_SAMPLE_TRANSACTION)
1140 ADD_FIELD(event_class, cw->data.u64, "perf_transaction");
1141
1142 if (type & PERF_SAMPLE_CALLCHAIN) {
1143 ADD_FIELD(event_class, cw->data.u32, "perf_callchain_size");
1144 ADD_FIELD(event_class,
1145 bt_ctf_field_type_sequence_create(
1146 cw->data.u64_hex, "perf_callchain_size"),
1147 "perf_callchain");
1148 }
1149
1150#undef ADD_FIELD
1151 return 0;
1152}
1153
1154static int add_event(struct ctf_writer *cw, struct evsel *evsel)
1155{
1156 struct bt_ctf_event_class *event_class;
1157 struct evsel_priv *priv;
1158 const char *name = perf_evsel__name(evsel);
1159 int ret;
1160
1161 pr("Adding event '%s' (type %d)\n", name, evsel->core.attr.type);
1162
1163 event_class = bt_ctf_event_class_create(name);
1164 if (!event_class)
1165 return -1;
1166
1167 ret = add_generic_types(cw, evsel, event_class);
1168 if (ret)
1169 goto err;
1170
1171 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
1172 ret = add_tracepoint_types(cw, evsel, event_class);
1173 if (ret)
1174 goto err;
1175 }
1176
1177 if (perf_evsel__is_bpf_output(evsel)) {
1178 ret = add_bpf_output_types(cw, event_class);
1179 if (ret)
1180 goto err;
1181 }
1182
1183 ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);
1184 if (ret) {
1185 pr("Failed to add event class into stream.\n");
1186 goto err;
1187 }
1188
1189 priv = malloc(sizeof(*priv));
1190 if (!priv)
1191 goto err;
1192
1193 priv->event_class = event_class;
1194 evsel->priv = priv;
1195 return 0;
1196
1197err:
1198 bt_ctf_event_class_put(event_class);
1199 pr_err("Failed to add event '%s'.\n", name);
1200 return -1;
1201}
1202
1203static int setup_events(struct ctf_writer *cw, struct perf_session *session)
1204{
1205 struct evlist *evlist = session->evlist;
1206 struct evsel *evsel;
1207 int ret;
1208
1209 evlist__for_each_entry(evlist, evsel) {
1210 ret = add_event(cw, evsel);
1211 if (ret)
1212 return ret;
1213 }
1214 return 0;
1215}
1216
1217#define __NON_SAMPLE_ADD_FIELD(t, n) \
1218 do { \
1219 pr2(" field '%s'\n", #n); \
1220 if (bt_ctf_event_class_add_field(event_class, cw->data.t, #n)) {\
1221 pr_err("Failed to add field '%s';\n", #n);\
1222 return -1; \
1223 } \
1224 } while(0)
1225
1226#define __FUNC_ADD_NON_SAMPLE_EVENT_CLASS(_name, body) \
1227static int add_##_name##_event(struct ctf_writer *cw) \
1228{ \
1229 struct bt_ctf_event_class *event_class; \
1230 int ret; \
1231 \
1232 pr("Adding "#_name" event\n"); \
1233 event_class = bt_ctf_event_class_create("perf_" #_name);\
1234 if (!event_class) \
1235 return -1; \
1236 body \
1237 \
1238 ret = bt_ctf_stream_class_add_event_class(cw->stream_class, event_class);\
1239 if (ret) { \
1240 pr("Failed to add event class '"#_name"' into stream.\n");\
1241 return ret; \
1242 } \
1243 \
1244 cw->_name##_class = event_class; \
1245 bt_ctf_event_class_put(event_class); \
1246 return 0; \
1247}
1248
1249__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(comm,
1250 __NON_SAMPLE_ADD_FIELD(u32, pid);
1251 __NON_SAMPLE_ADD_FIELD(u32, tid);
1252 __NON_SAMPLE_ADD_FIELD(string, comm);
1253)
1254
1255__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(fork,
1256 __NON_SAMPLE_ADD_FIELD(u32, pid);
1257 __NON_SAMPLE_ADD_FIELD(u32, ppid);
1258 __NON_SAMPLE_ADD_FIELD(u32, tid);
1259 __NON_SAMPLE_ADD_FIELD(u32, ptid);
1260 __NON_SAMPLE_ADD_FIELD(u64, time);
1261)
1262
1263__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(exit,
1264 __NON_SAMPLE_ADD_FIELD(u32, pid);
1265 __NON_SAMPLE_ADD_FIELD(u32, ppid);
1266 __NON_SAMPLE_ADD_FIELD(u32, tid);
1267 __NON_SAMPLE_ADD_FIELD(u32, ptid);
1268 __NON_SAMPLE_ADD_FIELD(u64, time);
1269)
1270
1271__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap,
1272 __NON_SAMPLE_ADD_FIELD(u32, pid);
1273 __NON_SAMPLE_ADD_FIELD(u32, tid);
1274 __NON_SAMPLE_ADD_FIELD(u64_hex, start);
1275 __NON_SAMPLE_ADD_FIELD(string, filename);
1276)
1277
1278__FUNC_ADD_NON_SAMPLE_EVENT_CLASS(mmap2,
1279 __NON_SAMPLE_ADD_FIELD(u32, pid);
1280 __NON_SAMPLE_ADD_FIELD(u32, tid);
1281 __NON_SAMPLE_ADD_FIELD(u64_hex, start);
1282 __NON_SAMPLE_ADD_FIELD(string, filename);
1283)
1284#undef __NON_SAMPLE_ADD_FIELD
1285#undef __FUNC_ADD_NON_SAMPLE_EVENT_CLASS
1286
1287static int setup_non_sample_events(struct ctf_writer *cw,
1288 struct perf_session *session __maybe_unused)
1289{
1290 int ret;
1291
1292 ret = add_comm_event(cw);
1293 if (ret)
1294 return ret;
1295 ret = add_exit_event(cw);
1296 if (ret)
1297 return ret;
1298 ret = add_fork_event(cw);
1299 if (ret)
1300 return ret;
1301 ret = add_mmap_event(cw);
1302 if (ret)
1303 return ret;
1304 ret = add_mmap2_event(cw);
1305 if (ret)
1306 return ret;
1307 return 0;
1308}
1309
1310static void cleanup_events(struct perf_session *session)
1311{
1312 struct evlist *evlist = session->evlist;
1313 struct evsel *evsel;
1314
1315 evlist__for_each_entry(evlist, evsel) {
1316 struct evsel_priv *priv;
1317
1318 priv = evsel->priv;
1319 bt_ctf_event_class_put(priv->event_class);
1320 zfree(&evsel->priv);
1321 }
1322
1323 evlist__delete(evlist);
1324 session->evlist = NULL;
1325}
1326
1327static int setup_streams(struct ctf_writer *cw, struct perf_session *session)
1328{
1329 struct ctf_stream **stream;
1330 struct perf_header *ph = &session->header;
1331 int ncpus;
1332
1333 /*
1334 * Try to get the number of cpus used in the data file,
1335 * if not present fallback to the MAX_CPUS.
1336 */
1337 ncpus = ph->env.nr_cpus_avail ?: MAX_CPUS;
1338
1339 stream = zalloc(sizeof(*stream) * ncpus);
1340 if (!stream) {
1341 pr_err("Failed to allocate streams.\n");
1342 return -ENOMEM;
1343 }
1344
1345 cw->stream = stream;
1346 cw->stream_cnt = ncpus;
1347 return 0;
1348}
1349
1350static void free_streams(struct ctf_writer *cw)
1351{
1352 int cpu;
1353
1354 for (cpu = 0; cpu < cw->stream_cnt; cpu++)
1355 ctf_stream__delete(cw->stream[cpu]);
1356
1357 zfree(&cw->stream);
1358}
1359
1360static int ctf_writer__setup_env(struct ctf_writer *cw,
1361 struct perf_session *session)
1362{
1363 struct perf_header *header = &session->header;
1364 struct bt_ctf_writer *writer = cw->writer;
1365
1366#define ADD(__n, __v) \
1367do { \
1368 if (bt_ctf_writer_add_environment_field(writer, __n, __v)) \
1369 return -1; \
1370} while (0)
1371
1372 ADD("host", header->env.hostname);
1373 ADD("sysname", "Linux");
1374 ADD("release", header->env.os_release);
1375 ADD("version", header->env.version);
1376 ADD("machine", header->env.arch);
1377 ADD("domain", "kernel");
1378 ADD("tracer_name", "perf");
1379
1380#undef ADD
1381 return 0;
1382}
1383
1384static int ctf_writer__setup_clock(struct ctf_writer *cw)
1385{
1386 struct bt_ctf_clock *clock = cw->clock;
1387
1388 bt_ctf_clock_set_description(clock, "perf clock");
1389
1390#define SET(__n, __v) \
1391do { \
1392 if (bt_ctf_clock_set_##__n(clock, __v)) \
1393 return -1; \
1394} while (0)
1395
1396 SET(frequency, 1000000000);
1397 SET(offset_s, 0);
1398 SET(offset, 0);
1399 SET(precision, 10);
1400 SET(is_absolute, 0);
1401
1402#undef SET
1403 return 0;
1404}
1405
1406static struct bt_ctf_field_type *create_int_type(int size, bool sign, bool hex)
1407{
1408 struct bt_ctf_field_type *type;
1409
1410 type = bt_ctf_field_type_integer_create(size);
1411 if (!type)
1412 return NULL;
1413
1414 if (sign &&
1415 bt_ctf_field_type_integer_set_signed(type, 1))
1416 goto err;
1417
1418 if (hex &&
1419 bt_ctf_field_type_integer_set_base(type, BT_CTF_INTEGER_BASE_HEXADECIMAL))
1420 goto err;
1421
1422#if __BYTE_ORDER == __BIG_ENDIAN
1423 bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_BIG_ENDIAN);
1424#else
1425 bt_ctf_field_type_set_byte_order(type, BT_CTF_BYTE_ORDER_LITTLE_ENDIAN);
1426#endif
1427
1428 pr2("Created type: INTEGER %d-bit %ssigned %s\n",
1429 size, sign ? "un" : "", hex ? "hex" : "");
1430 return type;
1431
1432err:
1433 bt_ctf_field_type_put(type);
1434 return NULL;
1435}
1436
1437static void ctf_writer__cleanup_data(struct ctf_writer *cw)
1438{
1439 unsigned int i;
1440
1441 for (i = 0; i < ARRAY_SIZE(cw->data.array); i++)
1442 bt_ctf_field_type_put(cw->data.array[i]);
1443}
1444
1445static int ctf_writer__init_data(struct ctf_writer *cw)
1446{
1447#define CREATE_INT_TYPE(type, size, sign, hex) \
1448do { \
1449 (type) = create_int_type(size, sign, hex); \
1450 if (!(type)) \
1451 goto err; \
1452} while (0)
1453
1454 CREATE_INT_TYPE(cw->data.s64, 64, true, false);
1455 CREATE_INT_TYPE(cw->data.u64, 64, false, false);
1456 CREATE_INT_TYPE(cw->data.s32, 32, true, false);
1457 CREATE_INT_TYPE(cw->data.u32, 32, false, false);
1458 CREATE_INT_TYPE(cw->data.u32_hex, 32, false, true);
1459 CREATE_INT_TYPE(cw->data.u64_hex, 64, false, true);
1460
1461 cw->data.string = bt_ctf_field_type_string_create();
1462 if (cw->data.string)
1463 return 0;
1464
1465err:
1466 ctf_writer__cleanup_data(cw);
1467 pr_err("Failed to create data types.\n");
1468 return -1;
1469}
1470
1471static void ctf_writer__cleanup(struct ctf_writer *cw)
1472{
1473 ctf_writer__cleanup_data(cw);
1474
1475 bt_ctf_clock_put(cw->clock);
1476 free_streams(cw);
1477 bt_ctf_stream_class_put(cw->stream_class);
1478 bt_ctf_writer_put(cw->writer);
1479
1480 /* and NULL all the pointers */
1481 memset(cw, 0, sizeof(*cw));
1482}
1483
1484static int ctf_writer__init(struct ctf_writer *cw, const char *path)
1485{
1486 struct bt_ctf_writer *writer;
1487 struct bt_ctf_stream_class *stream_class;
1488 struct bt_ctf_clock *clock;
1489 struct bt_ctf_field_type *pkt_ctx_type;
1490 int ret;
1491
1492 /* CTF writer */
1493 writer = bt_ctf_writer_create(path);
1494 if (!writer)
1495 goto err;
1496
1497 cw->writer = writer;
1498
1499 /* CTF clock */
1500 clock = bt_ctf_clock_create("perf_clock");
1501 if (!clock) {
1502 pr("Failed to create CTF clock.\n");
1503 goto err_cleanup;
1504 }
1505
1506 cw->clock = clock;
1507
1508 if (ctf_writer__setup_clock(cw)) {
1509 pr("Failed to setup CTF clock.\n");
1510 goto err_cleanup;
1511 }
1512
1513 /* CTF stream class */
1514 stream_class = bt_ctf_stream_class_create("perf_stream");
1515 if (!stream_class) {
1516 pr("Failed to create CTF stream class.\n");
1517 goto err_cleanup;
1518 }
1519
1520 cw->stream_class = stream_class;
1521
1522 /* CTF clock stream setup */
1523 if (bt_ctf_stream_class_set_clock(stream_class, clock)) {
1524 pr("Failed to assign CTF clock to stream class.\n");
1525 goto err_cleanup;
1526 }
1527
1528 if (ctf_writer__init_data(cw))
1529 goto err_cleanup;
1530
1531 /* Add cpu_id for packet context */
1532 pkt_ctx_type = bt_ctf_stream_class_get_packet_context_type(stream_class);
1533 if (!pkt_ctx_type)
1534 goto err_cleanup;
1535
1536 ret = bt_ctf_field_type_structure_add_field(pkt_ctx_type, cw->data.u32, "cpu_id");
1537 bt_ctf_field_type_put(pkt_ctx_type);
1538 if (ret)
1539 goto err_cleanup;
1540
1541 /* CTF clock writer setup */
1542 if (bt_ctf_writer_add_clock(writer, clock)) {
1543 pr("Failed to assign CTF clock to writer.\n");
1544 goto err_cleanup;
1545 }
1546
1547 return 0;
1548
1549err_cleanup:
1550 ctf_writer__cleanup(cw);
1551err:
1552 pr_err("Failed to setup CTF writer.\n");
1553 return -1;
1554}
1555
1556static int ctf_writer__flush_streams(struct ctf_writer *cw)
1557{
1558 int cpu, ret = 0;
1559
1560 for (cpu = 0; cpu < cw->stream_cnt && !ret; cpu++)
1561 ret = ctf_stream__flush(cw->stream[cpu]);
1562
1563 return ret;
1564}
1565
1566static int convert__config(const char *var, const char *value, void *cb)
1567{
1568 struct convert *c = cb;
1569
1570 if (!strcmp(var, "convert.queue-size"))
1571 return perf_config_u64(&c->queue_size, var, value);
1572
1573 return 0;
1574}
1575
1576int bt_convert__perf2ctf(const char *input, const char *path,
1577 struct perf_data_convert_opts *opts)
1578{
1579 struct perf_session *session;
1580 struct perf_data data = {
1581 .path = input,
1582 .mode = PERF_DATA_MODE_READ,
1583 .force = opts->force,
1584 };
1585 struct convert c = {
1586 .tool = {
1587 .sample = process_sample_event,
1588 .mmap = perf_event__process_mmap,
1589 .mmap2 = perf_event__process_mmap2,
1590 .comm = perf_event__process_comm,
1591 .exit = perf_event__process_exit,
1592 .fork = perf_event__process_fork,
1593 .lost = perf_event__process_lost,
1594 .tracing_data = perf_event__process_tracing_data,
1595 .build_id = perf_event__process_build_id,
1596 .namespaces = perf_event__process_namespaces,
1597 .ordered_events = true,
1598 .ordering_requires_timestamps = true,
1599 },
1600 };
1601 struct ctf_writer *cw = &c.writer;
1602 int err;
1603
1604 if (opts->all) {
1605 c.tool.comm = process_comm_event;
1606 c.tool.exit = process_exit_event;
1607 c.tool.fork = process_fork_event;
1608 c.tool.mmap = process_mmap_event;
1609 c.tool.mmap2 = process_mmap2_event;
1610 }
1611
1612 err = perf_config(convert__config, &c);
1613 if (err)
1614 return err;
1615
1616 /* CTF writer */
1617 if (ctf_writer__init(cw, path))
1618 return -1;
1619
1620 err = -1;
1621 /* perf.data session */
1622 session = perf_session__new(&data, 0, &c.tool);
1623 if (IS_ERR(session)) {
1624 err = PTR_ERR(session);
1625 goto free_writer;
1626 }
1627
1628 if (c.queue_size) {
1629 ordered_events__set_alloc_size(&session->ordered_events,
1630 c.queue_size);
1631 }
1632
1633 /* CTF writer env/clock setup */
1634 if (ctf_writer__setup_env(cw, session))
1635 goto free_session;
1636
1637 /* CTF events setup */
1638 if (setup_events(cw, session))
1639 goto free_session;
1640
1641 if (opts->all && setup_non_sample_events(cw, session))
1642 goto free_session;
1643
1644 if (setup_streams(cw, session))
1645 goto free_session;
1646
1647 err = perf_session__process_events(session);
1648 if (!err)
1649 err = ctf_writer__flush_streams(cw);
1650 else
1651 pr_err("Error during conversion.\n");
1652
1653 fprintf(stderr,
1654 "[ perf data convert: Converted '%s' into CTF data '%s' ]\n",
1655 data.path, path);
1656
1657 fprintf(stderr,
1658 "[ perf data convert: Converted and wrote %.3f MB (%" PRIu64 " samples",
1659 (double) c.events_size / 1024.0 / 1024.0,
1660 c.events_count);
1661
1662 if (!c.non_sample_count)
1663 fprintf(stderr, ") ]\n");
1664 else
1665 fprintf(stderr, ", %" PRIu64 " non-samples) ]\n", c.non_sample_count);
1666
1667 cleanup_events(session);
1668 perf_session__delete(session);
1669 ctf_writer__cleanup(cw);
1670
1671 return err;
1672
1673free_session:
1674 perf_session__delete(session);
1675free_writer:
1676 ctf_writer__cleanup(cw);
1677 pr_err("Error during conversion setup.\n");
1678 return err;
1679}
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
38struct evsel_priv {
39 struct bt_ctf_event_class *event_class;
40};
41
42#define MAX_CPUS 4096
43
44struct ctf_stream {
45 struct bt_ctf_stream *stream;
46 int cpu;
47 u32 count;
48};
49
50struct 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
73struct 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
84static 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
120err:
121 bt_ctf_field_put(field);
122 return ret;
123}
124
125#define __FUNC_VALUE_SET(_name, _val_type) \
126static __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
137FUNC_VALUE_SET(s32)
138FUNC_VALUE_SET(u32)
139FUNC_VALUE_SET(s64)
140FUNC_VALUE_SET(u64)
141__FUNC_VALUE_SET(u64_hex, u64)
142
143static struct bt_ctf_field_type*
144get_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
170static 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
207static 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
313err_put_field:
314 bt_ctf_field_put(field);
315 return -1;
316}
317
318static 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
336static 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
355static int
356add_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
422put_seq_field:
423 bt_ctf_field_put(seq_field);
424put_seq_type:
425 bt_ctf_field_type_put(seq_type);
426put_len_field:
427 bt_ctf_field_put(len_field);
428put_len_type:
429 bt_ctf_field_type_put(len_type);
430 return ret;
431}
432
433static 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
511static 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
529static 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
574out:
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
584static 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
592static 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
604static 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 */
629static bool is_flush_needed(struct ctf_stream *cs)
630{
631 return cs->count >= STREAM_FLUSH_COUNT;
632}
633
634static 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. */
698static 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
727out:
728 if (name != orig_name)
729 free(name);
730 return new_name;
731}
732
733static 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
773static 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
816static 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
831static 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
850static 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
908static 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
951err:
952 bt_ctf_event_class_put(event_class);
953 pr_err("Failed to add event '%s'.\n", name);
954 return -1;
955}
956
957static 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
971static 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
988static 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
1011static 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
1021static 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) \
1028do { \
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
1045static 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) \
1052do { \
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
1067static 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
1093err:
1094 bt_ctf_field_type_put(type);
1095 return NULL;
1096}
1097
1098static 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
1106static int ctf_writer__init_data(struct ctf_writer *cw)
1107{
1108#define CREATE_INT_TYPE(type, size, sign, hex) \
1109do { \
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
1126err:
1127 ctf_writer__cleanup_data(cw);
1128 pr_err("Failed to create data types.\n");
1129 return -1;
1130}
1131
1132static 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
1145static 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
1210err_cleanup:
1211 ctf_writer__cleanup(cw);
1212err:
1213 pr_err("Failed to setup CTF writer.\n");
1214 return -1;
1215}
1216
1217static 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
1227static 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
1239int 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
1313free_session:
1314 perf_session__delete(session);
1315free_writer:
1316 ctf_writer__cleanup(cw);
1317 pr_err("Error during conversion setup.\n");
1318 return err;
1319}