summaryrefslogtreecommitdiff
path: root/tools/perf/util/db-export.c
blob: 2394c7506abe111ec21bbdea52d946c5a4866b99 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
// SPDX-License-Identifier: GPL-2.0-only
/*
 * db-export.c: Support for exporting data suitable for import to a database
 * Copyright (c) 2014, Intel Corporation.
 */

#include <errno.h>
#include <stdlib.h>

#include "evsel.h"
#include "machine.h"
#include "thread.h"
#include "comm.h"
#include "symbol.h"
#include "map.h"
#include "event.h"
#include "thread-stack.h"
#include "callchain.h"
#include "call-path.h"
#include "db-export.h"
#include <linux/zalloc.h>

struct deferred_export {
	struct list_head node;
	struct comm *comm;
};

static int db_export__deferred(struct db_export *dbe)
{
	struct deferred_export *de;
	int err;

	while (!list_empty(&dbe->deferred)) {
		de = list_entry(dbe->deferred.next, struct deferred_export,
				node);
		err = dbe->export_comm(dbe, de->comm);
		list_del_init(&de->node);
		free(de);
		if (err)
			return err;
	}

	return 0;
}

static void db_export__free_deferred(struct db_export *dbe)
{
	struct deferred_export *de;

	while (!list_empty(&dbe->deferred)) {
		de = list_entry(dbe->deferred.next, struct deferred_export,
				node);
		list_del_init(&de->node);
		free(de);
	}
}

static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
{
	struct deferred_export *de;

	de = zalloc(sizeof(struct deferred_export));
	if (!de)
		return -ENOMEM;

	de->comm = comm;
	list_add_tail(&de->node, &dbe->deferred);

	return 0;
}

int db_export__init(struct db_export *dbe)
{
	memset(dbe, 0, sizeof(struct db_export));
	INIT_LIST_HEAD(&dbe->deferred);
	return 0;
}

int db_export__flush(struct db_export *dbe)
{
	return db_export__deferred(dbe);
}

void db_export__exit(struct db_export *dbe)
{
	db_export__free_deferred(dbe);
	call_return_processor__free(dbe->crp);
	dbe->crp = NULL;
}

int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
{
	if (evsel->db_id)
		return 0;

	evsel->db_id = ++dbe->evsel_last_db_id;

	if (dbe->export_evsel)
		return dbe->export_evsel(dbe, evsel);

	return 0;
}

int db_export__machine(struct db_export *dbe, struct machine *machine)
{
	if (machine->db_id)
		return 0;

	machine->db_id = ++dbe->machine_last_db_id;

	if (dbe->export_machine)
		return dbe->export_machine(dbe, machine);

	return 0;
}

int db_export__thread(struct db_export *dbe, struct thread *thread,
		      struct machine *machine, struct comm *comm)
{
	struct thread *main_thread;
	u64 main_thread_db_id = 0;
	int err;

	if (thread->db_id)
		return 0;

	thread->db_id = ++dbe->thread_last_db_id;

	if (thread->pid_ != -1) {
		if (thread->pid_ == thread->tid) {
			main_thread = thread;
		} else {
			main_thread = machine__findnew_thread(machine,
							      thread->pid_,
							      thread->pid_);
			if (!main_thread)
				return -ENOMEM;
			err = db_export__thread(dbe, main_thread, machine,
						comm);
			if (err)
				goto out_put;
			if (comm) {
				err = db_export__comm_thread(dbe, comm, thread);
				if (err)
					goto out_put;
			}
		}
		main_thread_db_id = main_thread->db_id;
		if (main_thread != thread)
			thread__put(main_thread);
	}

	if (dbe->export_thread)
		return dbe->export_thread(dbe, thread, main_thread_db_id,
					  machine);

	return 0;

out_put:
	thread__put(main_thread);
	return err;
}

int db_export__comm(struct db_export *dbe, struct comm *comm,
		    struct thread *main_thread)
{
	int err;

	if (comm->db_id)
		return 0;

	comm->db_id = ++dbe->comm_last_db_id;

	if (dbe->export_comm) {
		if (main_thread->comm_set)
			err = dbe->export_comm(dbe, comm);
		else
			err = db_export__defer_comm(dbe, comm);
		if (err)
			return err;
	}

	return db_export__comm_thread(dbe, comm, main_thread);
}

int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
			   struct thread *thread)
{
	u64 db_id;

	db_id = ++dbe->comm_thread_last_db_id;

	if (dbe->export_comm_thread)
		return dbe->export_comm_thread(dbe, db_id, comm, thread);

	return 0;
}

int db_export__dso(struct db_export *dbe, struct dso *dso,
		   struct machine *machine)
{
	if (dso->db_id)
		return 0;

	dso->db_id = ++dbe->dso_last_db_id;

	if (dbe->export_dso)
		return dbe->export_dso(dbe, dso, machine);

	return 0;
}

int db_export__symbol(struct db_export *dbe, struct symbol *sym,
		      struct dso *dso)
{
	u64 *sym_db_id = symbol__priv(sym);

	if (*sym_db_id)
		return 0;

	*sym_db_id = ++dbe->symbol_last_db_id;

	if (dbe->export_symbol)
		return dbe->export_symbol(dbe, sym, dso);

	return 0;
}

static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
			  u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
{
	int err;

	if (al->map) {
		struct dso *dso = al->map->dso;

		err = db_export__dso(dbe, dso, al->machine);
		if (err)
			return err;
		*dso_db_id = dso->db_id;

		if (!al->sym) {
			al->sym = symbol__new(al->addr, 0, 0, 0, "unknown");
			if (al->sym)
				dso__insert_symbol(dso, al->sym);
		}

		if (al->sym) {
			u64 *db_id = symbol__priv(al->sym);

			err = db_export__symbol(dbe, al->sym, dso);
			if (err)
				return err;
			*sym_db_id = *db_id;
			*offset = al->addr - al->sym->start;
		}
	}

	return 0;
}

static struct call_path *call_path_from_sample(struct db_export *dbe,
					       struct machine *machine,
					       struct thread *thread,
					       struct perf_sample *sample,
					       struct perf_evsel *evsel)
{
	u64 kernel_start = machine__kernel_start(machine);
	struct call_path *current = &dbe->cpr->call_path;
	enum chain_order saved_order = callchain_param.order;
	int err;

	if (!symbol_conf.use_callchain || !sample->callchain)
		return NULL;

	/*
	 * Since the call path tree must be built starting with the root, we
	 * must use ORDER_CALL for call chain resolution, in order to process
	 * the callchain starting with the root node and ending with the leaf.
	 */
	callchain_param.order = ORDER_CALLER;
	err = thread__resolve_callchain(thread, &callchain_cursor, evsel,
					sample, NULL, NULL, PERF_MAX_STACK_DEPTH);
	if (err) {
		callchain_param.order = saved_order;
		return NULL;
	}
	callchain_cursor_commit(&callchain_cursor);

	while (1) {
		struct callchain_cursor_node *node;
		struct addr_location al;
		u64 dso_db_id = 0, sym_db_id = 0, offset = 0;

		memset(&al, 0, sizeof(al));

		node = callchain_cursor_current(&callchain_cursor);
		if (!node)
			break;
		/*
		 * Handle export of symbol and dso for this node by
		 * constructing an addr_location struct and then passing it to
		 * db_ids_from_al() to perform the export.
		 */
		al.sym = node->sym;
		al.map = node->map;
		al.machine = machine;
		al.addr = node->ip;

		if (al.map && !al.sym)
			al.sym = dso__find_symbol(al.map->dso, al.addr);

		db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);

		/* add node to the call path tree if it doesn't exist */
		current = call_path__findnew(dbe->cpr, current,
					     al.sym, node->ip,
					     kernel_start);

		callchain_cursor_advance(&callchain_cursor);
	}

	/* Reset the callchain order to its prior value. */
	callchain_param.order = saved_order;

	if (current == &dbe->cpr->call_path) {
		/* Bail because the callchain was empty. */
		return NULL;
	}

	return current;
}

int db_export__branch_type(struct db_export *dbe, u32 branch_type,
			   const char *name)
{
	if (dbe->export_branch_type)
		return dbe->export_branch_type(dbe, branch_type, name);

	return 0;
}

int db_export__sample(struct db_export *dbe, union perf_event *event,
		      struct perf_sample *sample, struct perf_evsel *evsel,
		      struct addr_location *al)
{
	struct thread* thread = al->thread;
	struct export_sample es = {
		.event = event,
		.sample = sample,
		.evsel = evsel,
		.al = al,
	};
	struct thread *main_thread;
	struct comm *comm = NULL;
	int err;

	err = db_export__evsel(dbe, evsel);
	if (err)
		return err;

	err = db_export__machine(dbe, al->machine);
	if (err)
		return err;

	main_thread = thread__main_thread(al->machine, thread);
	if (main_thread)
		comm = machine__thread_exec_comm(al->machine, main_thread);

	err = db_export__thread(dbe, thread, al->machine, comm);
	if (err)
		goto out_put;

	if (comm) {
		err = db_export__comm(dbe, comm, main_thread);
		if (err)
			goto out_put;
		es.comm_db_id = comm->db_id;
	}

	es.db_id = ++dbe->sample_last_db_id;

	err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
	if (err)
		goto out_put;

	if (dbe->cpr) {
		struct call_path *cp = call_path_from_sample(dbe, al->machine,
							     thread, sample,
							     evsel);
		if (cp) {
			db_export__call_path(dbe, cp);
			es.call_path_id = cp->db_id;
		}
	}

	if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
	    sample_addr_correlates_sym(&evsel->attr)) {
		struct addr_location addr_al;

		thread__resolve(thread, &addr_al, sample);
		err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
				     &es.addr_sym_db_id, &es.addr_offset);
		if (err)
			goto out_put;
		if (dbe->crp) {
			err = thread_stack__process(thread, comm, sample, al,
						    &addr_al, es.db_id,
						    dbe->crp);
			if (err)
				goto out_put;
		}
	}

	if (dbe->export_sample)
		err = dbe->export_sample(dbe, &es);

out_put:
	thread__put(main_thread);
	return err;
}

static struct {
	u32 branch_type;
	const char *name;
} branch_types[] = {
	{0, "no branch"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
	{PERF_IP_FLAG_BRANCH, "unconditional jump"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
	 "software interrupt"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
	 "return from interrupt"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
	 "system call"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
	 "return from system call"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
	 PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
	{PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
	{0, NULL}
};

int db_export__branch_types(struct db_export *dbe)
{
	int i, err = 0;

	for (i = 0; branch_types[i].name ; i++) {
		err = db_export__branch_type(dbe, branch_types[i].branch_type,
					     branch_types[i].name);
		if (err)
			break;
	}

	/* Add trace begin / end variants */
	for (i = 0; branch_types[i].name ; i++) {
		const char *name = branch_types[i].name;
		u32 type = branch_types[i].branch_type;
		char buf[64];

		if (type == PERF_IP_FLAG_BRANCH ||
		    (type & (PERF_IP_FLAG_TRACE_BEGIN | PERF_IP_FLAG_TRACE_END)))
			continue;

		snprintf(buf, sizeof(buf), "trace begin / %s", name);
		err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_BEGIN, buf);
		if (err)
			break;

		snprintf(buf, sizeof(buf), "%s / trace end", name);
		err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_END, buf);
		if (err)
			break;
	}

	return err;
}

int db_export__call_path(struct db_export *dbe, struct call_path *cp)
{
	int err;

	if (cp->db_id)
		return 0;

	if (cp->parent) {
		err = db_export__call_path(dbe, cp->parent);
		if (err)
			return err;
	}

	cp->db_id = ++dbe->call_path_last_db_id;

	if (dbe->export_call_path)
		return dbe->export_call_path(dbe, cp);

	return 0;
}

int db_export__call_return(struct db_export *dbe, struct call_return *cr,
			   u64 *parent_db_id)
{
	int err;

	err = db_export__call_path(dbe, cr->cp);
	if (err)
		return err;

	if (!cr->db_id)
		cr->db_id = ++dbe->call_return_last_db_id;

	if (parent_db_id) {
		if (!*parent_db_id)
			*parent_db_id = ++dbe->call_return_last_db_id;
		cr->parent_db_id = *parent_db_id;
	}

	if (dbe->export_call_return)
		return dbe->export_call_return(dbe, cr);

	return 0;
}