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Merge branch 'pm-cpufreq'
[linux-2.6-block.git] / tools / perf / util / evsel.c
CommitLineData
f8a95309
ACM		 1/*
2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
3 *
4 * Parts came from builtin-{top,stat,record}.c, see those files for further
5 * copyright notes.
6 *
7 * Released under the GPL v2. (and only v2, not any later version)
8 */
9
936be503 10#include <byteswap.h>
0f6a3015 11#include <linux/bitops.h>
553873e1 12#include <api/fs/debugfs.h>
4e319027
RR		 13#include <traceevent/event-parse.h>
14#include <linux/hw_breakpoint.h>
15#include <linux/perf_event.h>
bec19672 16#include <sys/resource.h>
4e319027 17#include "asm/bug.h"
8f651eae 18#include "callchain.h"
f14d5707 19#include "cgroup.h"
69aad6f1 20#include "evsel.h"
70082dd9 21#include "evlist.h"
69aad6f1 22#include "util.h"
86bd5e86 23#include "cpumap.h"
fd78260b 24#include "thread_map.h"
12864b31 25#include "target.h"
26d33022 26#include "perf_regs.h"
e3e1a54f 27#include "debug.h"
97978b3e 28#include "trace-event.h"
a9a3a4d9 29#include "stat.h"
69aad6f1 30
594ac61a
ACM		 31static struct {
32 bool sample_id_all;
33 bool exclude_guest;
5c5e854b 34 bool mmap2;
57480d2c 35 bool cloexec;
814c8c38
PZ		 36 bool clockid;
37 bool clockid_wrong;
594ac61a
ACM		 38} perf_missing_features;
39
814c8c38
PZ		 40static clockid_t clockid;
41
ce8ccff5
ACM		 42static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
43{
44 return 0;
45}
46
47static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
48{
49}
50
51static struct {
52 size_t size;
53 int (*init)(struct perf_evsel *evsel);
54 void (*fini)(struct perf_evsel *evsel);
55} perf_evsel__object = {
56 .size = sizeof(struct perf_evsel),
57 .init = perf_evsel__no_extra_init,
58 .fini = perf_evsel__no_extra_fini,
59};
60
61int perf_evsel__object_config(size_t object_size,
62 int (*init)(struct perf_evsel *evsel),
63 void (*fini)(struct perf_evsel *evsel))
64{
65
66 if (object_size == 0)
67 goto set_methods;
68
69 if (perf_evsel__object.size > object_size)
70 return -EINVAL;
71
72 perf_evsel__object.size = object_size;
73
74set_methods:
75 if (init != NULL)
76 perf_evsel__object.init = init;
77
78 if (fini != NULL)
79 perf_evsel__object.fini = fini;
80
81 return 0;
82}
83
c52b12ed
ACM		 84#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
85
75562573 86int __perf_evsel__sample_size(u64 sample_type)
c2a70653
ACM		 87{
88 u64 mask = sample_type & PERF_SAMPLE_MASK;
89 int size = 0;
90 int i;
91
92 for (i = 0; i < 64; i++) {
93 if (mask & (1ULL << i))
94 size++;
95 }
96
97 size *= sizeof(u64);
98
99 return size;
100}
101
75562573
AH		 102/**
103 * __perf_evsel__calc_id_pos - calculate id_pos.
104 * @sample_type: sample type
105 *
106 * This function returns the position of the event id (PERF_SAMPLE_ID or
107 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
108 * sample_event.
109 */
110static int __perf_evsel__calc_id_pos(u64 sample_type)
111{
112 int idx = 0;
113
114 if (sample_type & PERF_SAMPLE_IDENTIFIER)
115 return 0;
116
117 if (!(sample_type & PERF_SAMPLE_ID))
118 return -1;
119
120 if (sample_type & PERF_SAMPLE_IP)
121 idx += 1;
122
123 if (sample_type & PERF_SAMPLE_TID)
124 idx += 1;
125
126 if (sample_type & PERF_SAMPLE_TIME)
127 idx += 1;
128
129 if (sample_type & PERF_SAMPLE_ADDR)
130 idx += 1;
131
132 return idx;
133}
134
135/**
136 * __perf_evsel__calc_is_pos - calculate is_pos.
137 * @sample_type: sample type
138 *
139 * This function returns the position (counting backwards) of the event id
140 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
141 * sample_id_all is used there is an id sample appended to non-sample events.
142 */
143static int __perf_evsel__calc_is_pos(u64 sample_type)
144{
145 int idx = 1;
146
147 if (sample_type & PERF_SAMPLE_IDENTIFIER)
148 return 1;
149
150 if (!(sample_type & PERF_SAMPLE_ID))
151 return -1;
152
153 if (sample_type & PERF_SAMPLE_CPU)
154 idx += 1;
155
156 if (sample_type & PERF_SAMPLE_STREAM_ID)
157 idx += 1;
158
159 return idx;
160}
161
162void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
163{
164 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
165 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
166}
167
7be5ebe8
ACM		 168void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
169 enum perf_event_sample_format bit)
170{
171 if (!(evsel->attr.sample_type & bit)) {
172 evsel->attr.sample_type |= bit;
173 evsel->sample_size += sizeof(u64);
75562573 174 perf_evsel__calc_id_pos(evsel);
7be5ebe8
ACM		 175 }
176}
177
178void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
179 enum perf_event_sample_format bit)
180{
181 if (evsel->attr.sample_type & bit) {
182 evsel->attr.sample_type &= ~bit;
183 evsel->sample_size -= sizeof(u64);
75562573 184 perf_evsel__calc_id_pos(evsel);
7be5ebe8
ACM		 185 }
186}
187
75562573
AH		 188void perf_evsel__set_sample_id(struct perf_evsel *evsel,
189 bool can_sample_identifier)
7a5a5ca5 190{
75562573
AH		 191 if (can_sample_identifier) {
192 perf_evsel__reset_sample_bit(evsel, ID);
193 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
194 } else {
195 perf_evsel__set_sample_bit(evsel, ID);
196 }
7a5a5ca5
ACM		 197 evsel->attr.read_format |= PERF_FORMAT_ID;
198}
199
ef1d1af2
ACM		 200void perf_evsel__init(struct perf_evsel *evsel,
201 struct perf_event_attr *attr, int idx)
202{
203 evsel->idx = idx;
60b0896c 204 evsel->tracking = !idx;
ef1d1af2 205 evsel->attr = *attr;
2cfda562 206 evsel->leader = evsel;
410136f5
SE		 207 evsel->unit = "";
208 evsel->scale = 1.0;
d49e4695 209 evsel->evlist = NULL;
ef1d1af2 210 INIT_LIST_HEAD(&evsel->node);
930a2e29 211 INIT_LIST_HEAD(&evsel->config_terms);
ce8ccff5 212 perf_evsel__object.init(evsel);
bde09467 213 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
75562573 214 perf_evsel__calc_id_pos(evsel);
15bfd2cc 215 evsel->cmdline_group_boundary = false;
ef1d1af2
ACM		 216}
217
ef503831 218struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
69aad6f1 219{
ce8ccff5 220 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
69aad6f1 221
ef1d1af2
ACM		 222 if (evsel != NULL)
223 perf_evsel__init(evsel, attr, idx);
69aad6f1
ACM		 224
225 return evsel;
226}
227
ef503831 228struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
efd2b924 229{
ce8ccff5 230 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
efd2b924
ACM		 231
232 if (evsel != NULL) {
233 struct perf_event_attr attr = {
0b80f8b3
ACM		 234 .type = PERF_TYPE_TRACEPOINT,
235 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
236 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
efd2b924
ACM		 237 };
238
e48ffe2b
ACM		 239 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
240 goto out_free;
241
97978b3e 242 evsel->tp_format = trace_event__tp_format(sys, name);
efd2b924
ACM		 243 if (evsel->tp_format == NULL)
244 goto out_free;
245
0b80f8b3 246 event_attr_init(&attr);
efd2b924 247 attr.config = evsel->tp_format->id;
0b80f8b3 248 attr.sample_period = 1;
efd2b924 249 perf_evsel__init(evsel, &attr, idx);
efd2b924
ACM		 250 }
251
252 return evsel;
253
254out_free:
74cf249d 255 zfree(&evsel->name);
efd2b924
ACM		 256 free(evsel);
257 return NULL;
258}
259
8ad7013b 260const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
c410431c
ACM		 261 "cycles",
262 "instructions",
263 "cache-references",
264 "cache-misses",
265 "branches",
266 "branch-misses",
267 "bus-cycles",
268 "stalled-cycles-frontend",
269 "stalled-cycles-backend",
270 "ref-cycles",
271};
272
dd4f5223 273static const char *__perf_evsel__hw_name(u64 config)
c410431c
ACM		 274{
275 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
276 return perf_evsel__hw_names[config];
277
278 return "unknown-hardware";
279}
280
27f18617 281static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
c410431c 282{
27f18617 283 int colon = 0, r = 0;
c410431c 284 struct perf_event_attr *attr = &evsel->attr;
c410431c
ACM		 285 bool exclude_guest_default = false;
286
287#define MOD_PRINT(context, mod) do { \
288 if (!attr->exclude_##context) { \
27f18617 289 if (!colon) colon = ++r; \
c410431c
ACM		 290 r += scnprintf(bf + r, size - r, "%c", mod); \
291 } } while(0)
292
293 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
294 MOD_PRINT(kernel, 'k');
295 MOD_PRINT(user, 'u');
296 MOD_PRINT(hv, 'h');
297 exclude_guest_default = true;
298 }
299
300 if (attr->precise_ip) {
301 if (!colon)
27f18617 302 colon = ++r;
c410431c
ACM		 303 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
304 exclude_guest_default = true;
305 }
306
307 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
308 MOD_PRINT(host, 'H');
309 MOD_PRINT(guest, 'G');
310 }
311#undef MOD_PRINT
312 if (colon)
27f18617 313 bf[colon - 1] = ':';
c410431c
ACM		 314 return r;
315}
316
27f18617
ACM		 317static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
318{
319 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
320 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
321}
322
8ad7013b 323const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
335c2f5d
ACM		 324 "cpu-clock",
325 "task-clock",
326 "page-faults",
327 "context-switches",
8ad7013b 328 "cpu-migrations",
335c2f5d
ACM		 329 "minor-faults",
330 "major-faults",
331 "alignment-faults",
332 "emulation-faults",
d22d1a2a 333 "dummy",
335c2f5d
ACM		 334};
335
dd4f5223 336static const char *__perf_evsel__sw_name(u64 config)
335c2f5d
ACM		 337{
338 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
339 return perf_evsel__sw_names[config];
340 return "unknown-software";
341}
342
343static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
344{
345 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
346 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
347}
348
287e74aa
JO		 349static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
350{
351 int r;
352
353 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
354
355 if (type & HW_BREAKPOINT_R)
356 r += scnprintf(bf + r, size - r, "r");
357
358 if (type & HW_BREAKPOINT_W)
359 r += scnprintf(bf + r, size - r, "w");
360
361 if (type & HW_BREAKPOINT_X)
362 r += scnprintf(bf + r, size - r, "x");
363
364 return r;
365}
366
367static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
368{
369 struct perf_event_attr *attr = &evsel->attr;
370 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
371 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
372}
373
0b668bc9
ACM		 374const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
375 [PERF_EVSEL__MAX_ALIASES] = {
376 { "L1-dcache", "l1-d", "l1d", "L1-data", },
377 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
378 { "LLC", "L2", },
379 { "dTLB", "d-tlb", "Data-TLB", },
380 { "iTLB", "i-tlb", "Instruction-TLB", },
381 { "branch", "branches", "bpu", "btb", "bpc", },
382 { "node", },
383};
384
385const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
386 [PERF_EVSEL__MAX_ALIASES] = {
387 { "load", "loads", "read", },
388 { "store", "stores", "write", },
389 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
390};
391
392const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
393 [PERF_EVSEL__MAX_ALIASES] = {
394 { "refs", "Reference", "ops", "access", },
395 { "misses", "miss", },
396};
397
398#define C(x) PERF_COUNT_HW_CACHE_##x
399#define CACHE_READ (1 << C(OP_READ))
400#define CACHE_WRITE (1 << C(OP_WRITE))
401#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
402#define COP(x) (1 << x)
403
404/*
405 * cache operartion stat
406 * L1I : Read and prefetch only
407 * ITLB and BPU : Read-only
408 */
409static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
410 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
411 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
412 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
413 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
414 [C(ITLB)] = (CACHE_READ),
415 [C(BPU)] = (CACHE_READ),
416 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
417};
418
419bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
420{
421 if (perf_evsel__hw_cache_stat[type] & COP(op))
422 return true; /* valid */
423 else
424 return false; /* invalid */
425}
426
427int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
428 char *bf, size_t size)
429{
430 if (result) {
431 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
432 perf_evsel__hw_cache_op[op][0],
433 perf_evsel__hw_cache_result[result][0]);
434 }
435
436 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
437 perf_evsel__hw_cache_op[op][1]);
438}
439
dd4f5223 440static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
0b668bc9
ACM		 441{
442 u8 op, result, type = (config >> 0) & 0xff;
443 const char *err = "unknown-ext-hardware-cache-type";
444
445 if (type > PERF_COUNT_HW_CACHE_MAX)
446 goto out_err;
447
448 op = (config >> 8) & 0xff;
449 err = "unknown-ext-hardware-cache-op";
450 if (op > PERF_COUNT_HW_CACHE_OP_MAX)
451 goto out_err;
452
453 result = (config >> 16) & 0xff;
454 err = "unknown-ext-hardware-cache-result";
455 if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
456 goto out_err;
457
458 err = "invalid-cache";
459 if (!perf_evsel__is_cache_op_valid(type, op))
460 goto out_err;
461
462 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
463out_err:
464 return scnprintf(bf, size, "%s", err);
465}
466
467static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
468{
469 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
470 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
471}
472
6eef3d9c
ACM		 473static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
474{
475 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
476 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
477}
478
7289f83c 479const char *perf_evsel__name(struct perf_evsel *evsel)
a4460836 480{
7289f83c 481 char bf[128];
a4460836 482
7289f83c
ACM		 483 if (evsel->name)
484 return evsel->name;
c410431c
ACM		 485
486 switch (evsel->attr.type) {
487 case PERF_TYPE_RAW:
6eef3d9c 488 perf_evsel__raw_name(evsel, bf, sizeof(bf));
c410431c
ACM		 489 break;
490
491 case PERF_TYPE_HARDWARE:
7289f83c 492 perf_evsel__hw_name(evsel, bf, sizeof(bf));
c410431c 493 break;
0b668bc9
ACM		 494
495 case PERF_TYPE_HW_CACHE:
7289f83c 496 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
0b668bc9
ACM		 497 break;
498
335c2f5d 499 case PERF_TYPE_SOFTWARE:
7289f83c 500 perf_evsel__sw_name(evsel, bf, sizeof(bf));
335c2f5d
ACM		 501 break;
502
a4460836 503 case PERF_TYPE_TRACEPOINT:
7289f83c 504 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
a4460836
ACM		 505 break;
506
287e74aa
JO		 507 case PERF_TYPE_BREAKPOINT:
508 perf_evsel__bp_name(evsel, bf, sizeof(bf));
509 break;
510
c410431c 511 default:
ca1b1457
RR		 512 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
513 evsel->attr.type);
a4460836 514 break;
c410431c
ACM		 515 }
516
7289f83c
ACM		 517 evsel->name = strdup(bf);
518
519 return evsel->name ?: "unknown";
c410431c
ACM		 520}
521
717e263f
NK		 522const char *perf_evsel__group_name(struct perf_evsel *evsel)
523{
524 return evsel->group_name ?: "anon group";
525}
526
527int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
528{
529 int ret;
530 struct perf_evsel *pos;
531 const char *group_name = perf_evsel__group_name(evsel);
532
533 ret = scnprintf(buf, size, "%s", group_name);
534
535 ret += scnprintf(buf + ret, size - ret, " { %s",
536 perf_evsel__name(evsel));
537
538 for_each_group_member(pos, evsel)
539 ret += scnprintf(buf + ret, size - ret, ", %s",
540 perf_evsel__name(pos));
541
542 ret += scnprintf(buf + ret, size - ret, " }");
543
544 return ret;
545}
546
6bedfab6 547static void
aad2b21c 548perf_evsel__config_callgraph(struct perf_evsel *evsel,
c3a6a8c4
KL		 549 struct record_opts *opts,
550 struct callchain_param *param)
6bedfab6
JO		 551{
552 bool function = perf_evsel__is_function_event(evsel);
553 struct perf_event_attr *attr = &evsel->attr;
554
555 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
556
c3a6a8c4 557 if (param->record_mode == CALLCHAIN_LBR) {
aad2b21c
KL		 558 if (!opts->branch_stack) {
559 if (attr->exclude_user) {
560 pr_warning("LBR callstack option is only available "
561 "to get user callchain information. "
562 "Falling back to framepointers.\n");
563 } else {
564 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
565 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
566 PERF_SAMPLE_BRANCH_CALL_STACK;
567 }
568 } else
569 pr_warning("Cannot use LBR callstack with branch stack. "
570 "Falling back to framepointers.\n");
571 }
572
c3a6a8c4 573 if (param->record_mode == CALLCHAIN_DWARF) {
6bedfab6
JO		 574 if (!function) {
575 perf_evsel__set_sample_bit(evsel, REGS_USER);
576 perf_evsel__set_sample_bit(evsel, STACK_USER);
577 attr->sample_regs_user = PERF_REGS_MASK;
c3a6a8c4 578 attr->sample_stack_user = param->dump_size;
6bedfab6
JO		 579 attr->exclude_callchain_user = 1;
580 } else {
581 pr_info("Cannot use DWARF unwind for function trace event,"
582 " falling back to framepointers.\n");
583 }
584 }
585
586 if (function) {
587 pr_info("Disabling user space callchains for function trace event.\n");
588 attr->exclude_callchain_user = 1;
589 }
590}
591
d457c963
KL		 592static void
593perf_evsel__reset_callgraph(struct perf_evsel *evsel,
594 struct callchain_param *param)
595{
596 struct perf_event_attr *attr = &evsel->attr;
597
598 perf_evsel__reset_sample_bit(evsel, CALLCHAIN);
599 if (param->record_mode == CALLCHAIN_LBR) {
600 perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
601 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
602 PERF_SAMPLE_BRANCH_CALL_STACK);
603 }
604 if (param->record_mode == CALLCHAIN_DWARF) {
605 perf_evsel__reset_sample_bit(evsel, REGS_USER);
606 perf_evsel__reset_sample_bit(evsel, STACK_USER);
607 }
608}
609
610static void apply_config_terms(struct perf_evsel *evsel,
611 struct record_opts *opts)
930a2e29
JO		 612{
613 struct perf_evsel_config_term *term;
32067712
KL		 614 struct list_head *config_terms = &evsel->config_terms;
615 struct perf_event_attr *attr = &evsel->attr;
d457c963
KL		 616 struct callchain_param param;
617 u32 dump_size = 0;
618 char *callgraph_buf = NULL;
619
620 /* callgraph default */
621 param.record_mode = callchain_param.record_mode;
930a2e29
JO		 622
623 list_for_each_entry(term, config_terms, list) {
624 switch (term->type) {
ee4c7588
JO		 625 case PERF_EVSEL__CONFIG_TERM_PERIOD:
626 attr->sample_period = term->val.period;
ab35a7d0 627 attr->freq = 0;
32067712 628 break;
09af2a55
NK		 629 case PERF_EVSEL__CONFIG_TERM_FREQ:
630 attr->sample_freq = term->val.freq;
631 attr->freq = 1;
632 break;
32067712
KL		 633 case PERF_EVSEL__CONFIG_TERM_TIME:
634 if (term->val.time)
635 perf_evsel__set_sample_bit(evsel, TIME);
636 else
637 perf_evsel__reset_sample_bit(evsel, TIME);
638 break;
d457c963
KL		 639 case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
640 callgraph_buf = term->val.callgraph;
641 break;
642 case PERF_EVSEL__CONFIG_TERM_STACK_USER:
643 dump_size = term->val.stack_user;
644 break;
930a2e29
JO		 645 default:
646 break;
647 }
648 }
d457c963
KL		 649
650 /* User explicitly set per-event callgraph, clear the old setting and reset. */
651 if ((callgraph_buf != NULL) || (dump_size > 0)) {
652
653 /* parse callgraph parameters */
654 if (callgraph_buf != NULL) {
f9db0d0f
KL		 655 if (!strcmp(callgraph_buf, "no")) {
656 param.enabled = false;
657 param.record_mode = CALLCHAIN_NONE;
658 } else {
659 param.enabled = true;
660 if (parse_callchain_record(callgraph_buf, &param)) {
661 pr_err("per-event callgraph setting for %s failed. "
662 "Apply callgraph global setting for it\n",
663 evsel->name);
664 return;
665 }
d457c963
KL		 666 }
667 }
668 if (dump_size > 0) {
669 dump_size = round_up(dump_size, sizeof(u64));
670 param.dump_size = dump_size;
671 }
672
673 /* If global callgraph set, clear it */
674 if (callchain_param.enabled)
675 perf_evsel__reset_callgraph(evsel, &callchain_param);
676
677 /* set perf-event callgraph */
678 if (param.enabled)
679 perf_evsel__config_callgraph(evsel, opts, &param);
680 }
930a2e29
JO		 681}
682
774cb499
JO		 683/*
684 * The enable_on_exec/disabled value strategy:
685 *
686 * 1) For any type of traced program:
687 * - all independent events and group leaders are disabled
688 * - all group members are enabled
689 *
690 * Group members are ruled by group leaders. They need to
691 * be enabled, because the group scheduling relies on that.
692 *
693 * 2) For traced programs executed by perf:
694 * - all independent events and group leaders have
695 * enable_on_exec set
696 * - we don't specifically enable or disable any event during
697 * the record command
698 *
699 * Independent events and group leaders are initially disabled
700 * and get enabled by exec. Group members are ruled by group
701 * leaders as stated in 1).
702 *
703 * 3) For traced programs attached by perf (pid/tid):
704 * - we specifically enable or disable all events during
705 * the record command
706 *
707 * When attaching events to already running traced we
708 * enable/disable events specifically, as there's no
709 * initial traced exec call.
710 */
b4006796 711void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
0f82ebc4 712{
3c176311 713 struct perf_evsel *leader = evsel->leader;
0f82ebc4 714 struct perf_event_attr *attr = &evsel->attr;
60b0896c 715 int track = evsel->tracking;
3aa5939d 716 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
0f82ebc4 717
594ac61a 718 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
0f82ebc4 719 attr->inherit = !opts->no_inherit;
0f82ebc4 720
7be5ebe8
ACM		 721 perf_evsel__set_sample_bit(evsel, IP);
722 perf_evsel__set_sample_bit(evsel, TID);
0f82ebc4 723
3c176311
JO		 724 if (evsel->sample_read) {
725 perf_evsel__set_sample_bit(evsel, READ);
726
727 /*
728 * We need ID even in case of single event, because
729 * PERF_SAMPLE_READ process ID specific data.
730 */
75562573 731 perf_evsel__set_sample_id(evsel, false);
3c176311
JO		 732
733 /*
734 * Apply group format only if we belong to group
735 * with more than one members.
736 */
737 if (leader->nr_members > 1) {
738 attr->read_format |= PERF_FORMAT_GROUP;
739 attr->inherit = 0;
740 }
741 }
742
0f82ebc4 743 /*
17314e23 744 * We default some events to have a default interval. But keep
0f82ebc4
ACM		 745 * it a weak assumption overridable by the user.
746 */
17314e23 747 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
0f82ebc4
ACM		 748 opts->user_interval != ULLONG_MAX)) {
749 if (opts->freq) {
7be5ebe8 750 perf_evsel__set_sample_bit(evsel, PERIOD);
0f82ebc4
ACM		 751 attr->freq = 1;
752 attr->sample_freq = opts->freq;
753 } else {
754 attr->sample_period = opts->default_interval;
755 }
756 }
757
3c176311
JO		 758 /*
759 * Disable sampling for all group members other
760 * than leader in case leader 'leads' the sampling.
761 */
762 if ((leader != evsel) && leader->sample_read) {
763 attr->sample_freq = 0;
764 attr->sample_period = 0;
765 }
766
0f82ebc4
ACM		 767 if (opts->no_samples)
768 attr->sample_freq = 0;
769
770 if (opts->inherit_stat)
771 attr->inherit_stat = 1;
772
773 if (opts->sample_address) {
7be5ebe8 774 perf_evsel__set_sample_bit(evsel, ADDR);
0f82ebc4
ACM		 775 attr->mmap_data = track;
776 }
777
f140373b
JO		 778 /*
779 * We don't allow user space callchains for function trace
780 * event, due to issues with page faults while tracing page
781 * fault handler and its overall trickiness nature.
782 */
783 if (perf_evsel__is_function_event(evsel))
784 evsel->attr.exclude_callchain_user = 1;
785
72a128aa 786 if (callchain_param.enabled && !evsel->no_aux_samples)
c3a6a8c4 787 perf_evsel__config_callgraph(evsel, opts, &callchain_param);
26d33022 788
6a21c0b5
SE		 789 if (opts->sample_intr_regs) {
790 attr->sample_regs_intr = PERF_REGS_MASK;
791 perf_evsel__set_sample_bit(evsel, REGS_INTR);
792 }
793
3aa5939d 794 if (target__has_cpu(&opts->target))
7be5ebe8 795 perf_evsel__set_sample_bit(evsel, CPU);
0f82ebc4 796
3e76ac78 797 if (opts->period)
7be5ebe8 798 perf_evsel__set_sample_bit(evsel, PERIOD);
3e76ac78 799
8affc2b8
AK		 800 /*
801 * When the user explicitely disabled time don't force it here.
802 */
803 if (opts->sample_time &&
804 (!perf_missing_features.sample_id_all &&
3abebc55
AH		 805 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
806 opts->sample_time_set)))
7be5ebe8 807 perf_evsel__set_sample_bit(evsel, TIME);
0f82ebc4 808
6ff1ce76 809 if (opts->raw_samples && !evsel->no_aux_samples) {
7be5ebe8
ACM		 810 perf_evsel__set_sample_bit(evsel, TIME);
811 perf_evsel__set_sample_bit(evsel, RAW);
812 perf_evsel__set_sample_bit(evsel, CPU);
0f82ebc4
ACM		 813 }
814
ccf49bfc 815 if (opts->sample_address)
1e7ed5ec 816 perf_evsel__set_sample_bit(evsel, DATA_SRC);
ccf49bfc 817
509051ea 818 if (opts->no_buffering) {
0f82ebc4
ACM		 819 attr->watermark = 0;
820 attr->wakeup_events = 1;
821 }
6ff1ce76 822 if (opts->branch_stack && !evsel->no_aux_samples) {
7be5ebe8 823 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
bdfebd84
RAV		 824 attr->branch_sample_type = opts->branch_stack;
825 }
0f82ebc4 826
05484298 827 if (opts->sample_weight)
1e7ed5ec 828 perf_evsel__set_sample_bit(evsel, WEIGHT);
05484298 829
62e503b7 830 attr->task = track;
5c5e854b 831 attr->mmap = track;
a5a5ba72 832 attr->mmap2 = track && !perf_missing_features.mmap2;
5c5e854b 833 attr->comm = track;
0f82ebc4 834
b757bb09
AH		 835 if (opts->record_switch_events)
836 attr->context_switch = track;
837
475eeab9 838 if (opts->sample_transaction)
1e7ed5ec 839 perf_evsel__set_sample_bit(evsel, TRANSACTION);
475eeab9 840
85c273d2
AK		 841 if (opts->running_time) {
842 evsel->attr.read_format |=
843 PERF_FORMAT_TOTAL_TIME_ENABLED |
844 PERF_FORMAT_TOTAL_TIME_RUNNING;
845 }
846
774cb499
JO		 847 /*
848 * XXX see the function comment above
849 *
850 * Disabling only independent events or group leaders,
851 * keeping group members enabled.
852 */
823254ed 853 if (perf_evsel__is_group_leader(evsel))
774cb499
JO		 854 attr->disabled = 1;
855
856 /*
857 * Setting enable_on_exec for independent events and
858 * group leaders for traced executed by perf.
859 */
6619a53e
AK		 860 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
861 !opts->initial_delay)
0f82ebc4 862 attr->enable_on_exec = 1;
2afd2bcf
AH		 863
864 if (evsel->immediate) {
865 attr->disabled = 0;
866 attr->enable_on_exec = 0;
867 }
814c8c38
PZ		 868
869 clockid = opts->clockid;
870 if (opts->use_clockid) {
871 attr->use_clockid = 1;
872 attr->clockid = opts->clockid;
873 }
930a2e29
JO		 874
875 /*
876 * Apply event specific term settings,
877 * it overloads any global configuration.
878 */
d457c963 879 apply_config_terms(evsel, opts);
0f82ebc4
ACM		 880}
881
8885846f 882static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
69aad6f1 883{
4af4c955 884 int cpu, thread;
bf8e8f4b
AH		 885
886 if (evsel->system_wide)
887 nthreads = 1;
888
69aad6f1 889 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
4af4c955
DA		 890
891 if (evsel->fd) {
892 for (cpu = 0; cpu < ncpus; cpu++) {
893 for (thread = 0; thread < nthreads; thread++) {
894 FD(evsel, cpu, thread) = -1;
895 }
896 }
897 }
898
69aad6f1
ACM		 899 return evsel->fd != NULL ? 0 : -ENOMEM;
900}
901
e2407bef
AK		 902static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
903 int ioc, void *arg)
745cefc5
ACM		 904{
905 int cpu, thread;
906
bf8e8f4b
AH		 907 if (evsel->system_wide)
908 nthreads = 1;
909
745cefc5
ACM		 910 for (cpu = 0; cpu < ncpus; cpu++) {
911 for (thread = 0; thread < nthreads; thread++) {
912 int fd = FD(evsel, cpu, thread),
e2407bef 913 err = ioctl(fd, ioc, arg);
745cefc5
ACM		 914
915 if (err)
916 return err;
917 }
918 }
919
920 return 0;
921}
922
f47805a2
ACM		 923int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
924 const char *filter)
e2407bef
AK		 925{
926 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
927 PERF_EVENT_IOC_SET_FILTER,
928 (void *)filter);
929}
930
12467ae4
ACM		 931int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter)
932{
933 char *new_filter = strdup(filter);
934
935 if (new_filter != NULL) {
936 free(evsel->filter);
937 evsel->filter = new_filter;
938 return 0;
939 }
940
941 return -1;
942}
943
64ec84f5
ACM		 944int perf_evsel__append_filter(struct perf_evsel *evsel,
945 const char *op, const char *filter)
946{
947 char *new_filter;
948
949 if (evsel->filter == NULL)
950 return perf_evsel__set_filter(evsel, filter);
951
952 if (asprintf(&new_filter,"(%s) %s (%s)", evsel->filter, op, filter) > 0) {
953 free(evsel->filter);
954 evsel->filter = new_filter;
955 return 0;
956 }
957
958 return -1;
959}
960
e2407bef
AK		 961int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
962{
963 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
964 PERF_EVENT_IOC_ENABLE,
965 0);
966}
967
70db7533
ACM		 968int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
969{
8d9cbd8f
VG		 970 if (ncpus == 0 || nthreads == 0)
971 return 0;
972
bf8e8f4b
AH		 973 if (evsel->system_wide)
974 nthreads = 1;
975
a91e5431
ACM		 976 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
977 if (evsel->sample_id == NULL)
978 return -ENOMEM;
979
980 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
981 if (evsel->id == NULL) {
982 xyarray__delete(evsel->sample_id);
983 evsel->sample_id = NULL;
984 return -ENOMEM;
985 }
986
987 return 0;
70db7533
ACM		 988}
989
8885846f 990static void perf_evsel__free_fd(struct perf_evsel *evsel)
69aad6f1
ACM		 991{
992 xyarray__delete(evsel->fd);
993 evsel->fd = NULL;
994}
995
8885846f 996static void perf_evsel__free_id(struct perf_evsel *evsel)
70db7533 997{
a91e5431
ACM		 998 xyarray__delete(evsel->sample_id);
999 evsel->sample_id = NULL;
04662523 1000 zfree(&evsel->id);
70db7533
ACM		 1001}
1002
930a2e29
JO		 1003static void perf_evsel__free_config_terms(struct perf_evsel *evsel)
1004{
1005 struct perf_evsel_config_term *term, *h;
1006
1007 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1008 list_del(&term->list);
1009 free(term);
1010 }
1011}
1012
c52b12ed
ACM		 1013void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
1014{
1015 int cpu, thread;
1016
bf8e8f4b
AH		 1017 if (evsel->system_wide)
1018 nthreads = 1;
1019
c52b12ed
ACM		 1020 for (cpu = 0; cpu < ncpus; cpu++)
1021 for (thread = 0; thread < nthreads; ++thread) {
1022 close(FD(evsel, cpu, thread));
1023 FD(evsel, cpu, thread) = -1;
1024 }
1025}
1026
ef1d1af2 1027void perf_evsel__exit(struct perf_evsel *evsel)
69aad6f1
ACM		 1028{
1029 assert(list_empty(&evsel->node));
d49e4695 1030 assert(evsel->evlist == NULL);
736b05a0
NK		 1031 perf_evsel__free_fd(evsel);
1032 perf_evsel__free_id(evsel);
930a2e29 1033 perf_evsel__free_config_terms(evsel);
597e48c1 1034 close_cgroup(evsel->cgrp);
f30a79b0 1035 cpu_map__put(evsel->cpus);
578e91ec 1036 thread_map__put(evsel->threads);
597e48c1 1037 zfree(&evsel->group_name);
597e48c1 1038 zfree(&evsel->name);
ce8ccff5 1039 perf_evsel__object.fini(evsel);
ef1d1af2
ACM		 1040}
1041
1042void perf_evsel__delete(struct perf_evsel *evsel)
1043{
1044 perf_evsel__exit(evsel);
69aad6f1
ACM		 1045 free(evsel);
1046}
c52b12ed 1047
a6fa0038 1048void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
857a94a2 1049 struct perf_counts_values *count)
c7a79c47
SE		 1050{
1051 struct perf_counts_values tmp;
1052
1053 if (!evsel->prev_raw_counts)
1054 return;
1055
1056 if (cpu == -1) {
1057 tmp = evsel->prev_raw_counts->aggr;
1058 evsel->prev_raw_counts->aggr = *count;
1059 } else {
a6fa0038
JO		 1060 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1061 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
c7a79c47
SE		 1062 }
1063
1064 count->val = count->val - tmp.val;
1065 count->ena = count->ena - tmp.ena;
1066 count->run = count->run - tmp.run;
1067}
1068
13112bbf
JO		 1069void perf_counts_values__scale(struct perf_counts_values *count,
1070 bool scale, s8 *pscaled)
1071{
1072 s8 scaled = 0;
1073
1074 if (scale) {
1075 if (count->run == 0) {
1076 scaled = -1;
1077 count->val = 0;
1078 } else if (count->run < count->ena) {
1079 scaled = 1;
1080 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
1081 }
1082 } else
1083 count->ena = count->run = 0;
1084
1085 if (pscaled)
1086 *pscaled = scaled;
1087}
1088
f99f4719
JO		 1089int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
1090 struct perf_counts_values *count)
1091{
1092 memset(count, 0, sizeof(*count));
1093
1094 if (FD(evsel, cpu, thread) < 0)
1095 return -EINVAL;
1096
1097 if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0)
1098 return -errno;
1099
1100 return 0;
1101}
1102
c52b12ed
ACM		 1103int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
1104 int cpu, int thread, bool scale)
1105{
1106 struct perf_counts_values count;
1107 size_t nv = scale ? 3 : 1;
1108
1109 if (FD(evsel, cpu, thread) < 0)
1110 return -EINVAL;
1111
a6fa0038 1112 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
4eed11d5
ACM		 1113 return -ENOMEM;
1114
c52b12ed
ACM		 1115 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
1116 return -errno;
1117
a6fa0038 1118 perf_evsel__compute_deltas(evsel, cpu, thread, &count);
13112bbf 1119 perf_counts_values__scale(&count, scale, NULL);
a6fa0038 1120 *perf_counts(evsel->counts, cpu, thread) = count;
c52b12ed
ACM		 1121 return 0;
1122}
1123
6a4bb04c
JO		 1124static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
1125{
1126 struct perf_evsel *leader = evsel->leader;
1127 int fd;
1128
823254ed 1129 if (perf_evsel__is_group_leader(evsel))
6a4bb04c
JO		 1130 return -1;
1131
1132 /*
1133 * Leader must be already processed/open,
1134 * if not it's a bug.
1135 */
1136 BUG_ON(!leader->fd);
1137
1138 fd = FD(leader, cpu, thread);
1139 BUG_ON(fd == -1);
1140
1141 return fd;
1142}
1143
2c5e8c52
PZ		 1144struct bit_names {
1145 int bit;
1146 const char *name;
1147};
1148
1149static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1150{
1151 bool first_bit = true;
1152 int i = 0;
1153
1154 do {
1155 if (value & bits[i].bit) {
1156 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1157 first_bit = false;
1158 }
1159 } while (bits[++i].name != NULL);
1160}
1161
1162static void __p_sample_type(char *buf, size_t size, u64 value)
1163{
1164#define bit_name(n) { PERF_SAMPLE_##n, #n }
1165 struct bit_names bits[] = {
1166 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1167 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1168 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1169 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1170 bit_name(IDENTIFIER), bit_name(REGS_INTR),
1171 { .name = NULL, }
1172 };
1173#undef bit_name
1174 __p_bits(buf, size, value, bits);
1175}
1176
1177static void __p_read_format(char *buf, size_t size, u64 value)
1178{
1179#define bit_name(n) { PERF_FORMAT_##n, #n }
1180 struct bit_names bits[] = {
1181 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1182 bit_name(ID), bit_name(GROUP),
1183 { .name = NULL, }
1184 };
1185#undef bit_name
1186 __p_bits(buf, size, value, bits);
1187}
1188
1189#define BUF_SIZE 1024
1190
7310aed7 1191#define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
2c5e8c52
PZ		 1192#define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1193#define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1194#define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1195#define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1196
1197#define PRINT_ATTRn(_n, _f, _p) \
1198do { \
1199 if (attr->_f) { \
1200 _p(attr->_f); \
1201 ret += attr__fprintf(fp, _n, buf, priv);\
1202 } \
1203} while (0)
1204
1205#define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1206
1207int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1208 attr__fprintf_f attr__fprintf, void *priv)
1209{
1210 char buf[BUF_SIZE];
1211 int ret = 0;
1212
1213 PRINT_ATTRf(type, p_unsigned);
1214 PRINT_ATTRf(size, p_unsigned);
1215 PRINT_ATTRf(config, p_hex);
1216 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1217 PRINT_ATTRf(sample_type, p_sample_type);
1218 PRINT_ATTRf(read_format, p_read_format);
1219
1220 PRINT_ATTRf(disabled, p_unsigned);
1221 PRINT_ATTRf(inherit, p_unsigned);
1222 PRINT_ATTRf(pinned, p_unsigned);
1223 PRINT_ATTRf(exclusive, p_unsigned);
1224 PRINT_ATTRf(exclude_user, p_unsigned);
1225 PRINT_ATTRf(exclude_kernel, p_unsigned);
1226 PRINT_ATTRf(exclude_hv, p_unsigned);
1227 PRINT_ATTRf(exclude_idle, p_unsigned);
1228 PRINT_ATTRf(mmap, p_unsigned);
1229 PRINT_ATTRf(comm, p_unsigned);
1230 PRINT_ATTRf(freq, p_unsigned);
1231 PRINT_ATTRf(inherit_stat, p_unsigned);
1232 PRINT_ATTRf(enable_on_exec, p_unsigned);
1233 PRINT_ATTRf(task, p_unsigned);
1234 PRINT_ATTRf(watermark, p_unsigned);
1235 PRINT_ATTRf(precise_ip, p_unsigned);
1236 PRINT_ATTRf(mmap_data, p_unsigned);
1237 PRINT_ATTRf(sample_id_all, p_unsigned);
1238 PRINT_ATTRf(exclude_host, p_unsigned);
1239 PRINT_ATTRf(exclude_guest, p_unsigned);
1240 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1241 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1242 PRINT_ATTRf(mmap2, p_unsigned);
1243 PRINT_ATTRf(comm_exec, p_unsigned);
1244 PRINT_ATTRf(use_clockid, p_unsigned);
0286039f 1245 PRINT_ATTRf(context_switch, p_unsigned);
2c5e8c52
PZ		 1246
1247 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1248 PRINT_ATTRf(bp_type, p_unsigned);
1249 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1250 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1251 PRINT_ATTRf(sample_regs_user, p_hex);
1252 PRINT_ATTRf(sample_stack_user, p_unsigned);
1253 PRINT_ATTRf(clockid, p_signed);
1254 PRINT_ATTRf(sample_regs_intr, p_hex);
70d73de4 1255 PRINT_ATTRf(aux_watermark, p_unsigned);
e3e1a54f
AH		 1256
1257 return ret;
1258}
1259
2c5e8c52
PZ		 1260static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1261 void *priv __attribute__((unused)))
1262{
1263 return fprintf(fp, " %-32s %s\n", name, val);
1264}
1265
0252208e 1266static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 1267 struct thread_map *threads)
48290609 1268{
bf8e8f4b 1269 int cpu, thread, nthreads;
57480d2c 1270 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
727ab04e 1271 int pid = -1, err;
bec19672 1272 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
48290609 1273
bf8e8f4b
AH		 1274 if (evsel->system_wide)
1275 nthreads = 1;
1276 else
1277 nthreads = threads->nr;
1278
0252208e 1279 if (evsel->fd == NULL &&
bf8e8f4b 1280 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
727ab04e 1281 return -ENOMEM;
4eed11d5 1282
023695d9 1283 if (evsel->cgrp) {
57480d2c 1284 flags |= PERF_FLAG_PID_CGROUP;
023695d9
SE		 1285 pid = evsel->cgrp->fd;
1286 }
1287
594ac61a 1288fallback_missing_features:
814c8c38
PZ		 1289 if (perf_missing_features.clockid_wrong)
1290 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1291 if (perf_missing_features.clockid) {
1292 evsel->attr.use_clockid = 0;
1293 evsel->attr.clockid = 0;
1294 }
57480d2c
YD		 1295 if (perf_missing_features.cloexec)
1296 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
5c5e854b
SE		 1297 if (perf_missing_features.mmap2)
1298 evsel->attr.mmap2 = 0;
594ac61a
ACM		 1299 if (perf_missing_features.exclude_guest)
1300 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1301retry_sample_id:
1302 if (perf_missing_features.sample_id_all)
1303 evsel->attr.sample_id_all = 0;
1304
2c5e8c52
PZ		 1305 if (verbose >= 2) {
1306 fprintf(stderr, "%.60s\n", graph_dotted_line);
1307 fprintf(stderr, "perf_event_attr:\n");
1308 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1309 fprintf(stderr, "%.60s\n", graph_dotted_line);
1310 }
e3e1a54f 1311
86bd5e86 1312 for (cpu = 0; cpu < cpus->nr; cpu++) {
9d04f178 1313
bf8e8f4b 1314 for (thread = 0; thread < nthreads; thread++) {
6a4bb04c 1315 int group_fd;
023695d9 1316
bf8e8f4b 1317 if (!evsel->cgrp && !evsel->system_wide)
e13798c7 1318 pid = thread_map__pid(threads, thread);
023695d9 1319
6a4bb04c 1320 group_fd = get_group_fd(evsel, cpu, thread);
bec19672 1321retry_open:
a33f6efc 1322 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
e3e1a54f
AH		 1323 pid, cpus->map[cpu], group_fd, flags);
1324
0252208e 1325 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
023695d9 1326 pid,
f08199d3 1327 cpus->map[cpu],
023695d9 1328 group_fd, flags);
727ab04e
ACM		 1329 if (FD(evsel, cpu, thread) < 0) {
1330 err = -errno;
a33f6efc 1331 pr_debug2("sys_perf_event_open failed, error %d\n",
f852fd62 1332 err);
594ac61a 1333 goto try_fallback;
727ab04e 1334 }
bec19672 1335 set_rlimit = NO_CHANGE;
814c8c38
PZ		 1336
1337 /*
1338 * If we succeeded but had to kill clockid, fail and
1339 * have perf_evsel__open_strerror() print us a nice
1340 * error.
1341 */
1342 if (perf_missing_features.clockid ||
1343 perf_missing_features.clockid_wrong) {
1344 err = -EINVAL;
1345 goto out_close;
1346 }
0252208e 1347 }
48290609
ACM		 1348 }
1349
1350 return 0;
1351
594ac61a 1352try_fallback:
bec19672
AK		 1353 /*
1354 * perf stat needs between 5 and 22 fds per CPU. When we run out
1355 * of them try to increase the limits.
1356 */
1357 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1358 struct rlimit l;
1359 int old_errno = errno;
1360
1361 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1362 if (set_rlimit == NO_CHANGE)
1363 l.rlim_cur = l.rlim_max;
1364 else {
1365 l.rlim_cur = l.rlim_max + 1000;
1366 l.rlim_max = l.rlim_cur;
1367 }
1368 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1369 set_rlimit++;
1370 errno = old_errno;
1371 goto retry_open;
1372 }
1373 }
1374 errno = old_errno;
1375 }
1376
594ac61a
ACM		 1377 if (err != -EINVAL || cpu > 0 || thread > 0)
1378 goto out_close;
1379
814c8c38
PZ		 1380 /*
1381 * Must probe features in the order they were added to the
1382 * perf_event_attr interface.
1383 */
1384 if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1385 perf_missing_features.clockid_wrong = true;
1386 goto fallback_missing_features;
1387 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1388 perf_missing_features.clockid = true;
1389 goto fallback_missing_features;
1390 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
57480d2c
YD		 1391 perf_missing_features.cloexec = true;
1392 goto fallback_missing_features;
1393 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
5c5e854b
SE		 1394 perf_missing_features.mmap2 = true;
1395 goto fallback_missing_features;
1396 } else if (!perf_missing_features.exclude_guest &&
1397 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
594ac61a
ACM		 1398 perf_missing_features.exclude_guest = true;
1399 goto fallback_missing_features;
1400 } else if (!perf_missing_features.sample_id_all) {
1401 perf_missing_features.sample_id_all = true;
1402 goto retry_sample_id;
1403 }
1404
48290609 1405out_close:
0252208e
ACM		 1406 do {
1407 while (--thread >= 0) {
1408 close(FD(evsel, cpu, thread));
1409 FD(evsel, cpu, thread) = -1;
1410 }
bf8e8f4b 1411 thread = nthreads;
0252208e 1412 } while (--cpu >= 0);
727ab04e
ACM		 1413 return err;
1414}
1415
1416void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1417{
1418 if (evsel->fd == NULL)
1419 return;
1420
1421 perf_evsel__close_fd(evsel, ncpus, nthreads);
1422 perf_evsel__free_fd(evsel);
48290609
ACM		 1423}
1424
0252208e
ACM		 1425static struct {
1426 struct cpu_map map;
1427 int cpus[1];
1428} empty_cpu_map = {
1429 .map.nr = 1,
1430 .cpus = { -1, },
1431};
1432
1433static struct {
1434 struct thread_map map;
1435 int threads[1];
1436} empty_thread_map = {
1437 .map.nr = 1,
1438 .threads = { -1, },
1439};
1440
f08199d3 1441int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 1442 struct thread_map *threads)
48290609 1443{
0252208e
ACM		 1444 if (cpus == NULL) {
1445 /* Work around old compiler warnings about strict aliasing */
1446 cpus = &empty_cpu_map.map;
48290609
ACM		 1447 }
1448
0252208e
ACM		 1449 if (threads == NULL)
1450 threads = &empty_thread_map.map;
48290609 1451
6a4bb04c 1452 return __perf_evsel__open(evsel, cpus, threads);
48290609
ACM		 1453}
1454
f08199d3 1455int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
6a4bb04c 1456 struct cpu_map *cpus)
48290609 1457{
6a4bb04c 1458 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
0252208e 1459}
48290609 1460
f08199d3 1461int perf_evsel__open_per_thread(struct perf_evsel *evsel,
6a4bb04c 1462 struct thread_map *threads)
0252208e 1463{
6a4bb04c 1464 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
48290609 1465}
70082dd9 1466
0807d2d8
ACM		 1467static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1468 const union perf_event *event,
1469 struct perf_sample *sample)
d0dd74e8 1470{
0807d2d8 1471 u64 type = evsel->attr.sample_type;
d0dd74e8 1472 const u64 *array = event->sample.array;
0807d2d8 1473 bool swapped = evsel->needs_swap;
37073f9e 1474 union u64_swap u;
d0dd74e8
ACM		 1475
1476 array += ((event->header.size -
1477 sizeof(event->header)) / sizeof(u64)) - 1;
1478
75562573
AH		 1479 if (type & PERF_SAMPLE_IDENTIFIER) {
1480 sample->id = *array;
1481 array--;
1482 }
1483
d0dd74e8 1484 if (type & PERF_SAMPLE_CPU) {
37073f9e
JO		 1485 u.val64 = *array;
1486 if (swapped) {
1487 /* undo swap of u64, then swap on individual u32s */
1488 u.val64 = bswap_64(u.val64);
1489 u.val32[0] = bswap_32(u.val32[0]);
1490 }
1491
1492 sample->cpu = u.val32[0];
d0dd74e8
ACM		 1493 array--;
1494 }
1495
1496 if (type & PERF_SAMPLE_STREAM_ID) {
1497 sample->stream_id = *array;
1498 array--;
1499 }
1500
1501 if (type & PERF_SAMPLE_ID) {
1502 sample->id = *array;
1503 array--;
1504 }
1505
1506 if (type & PERF_SAMPLE_TIME) {
1507 sample->time = *array;
1508 array--;
1509 }
1510
1511 if (type & PERF_SAMPLE_TID) {
37073f9e
JO		 1512 u.val64 = *array;
1513 if (swapped) {
1514 /* undo swap of u64, then swap on individual u32s */
1515 u.val64 = bswap_64(u.val64);
1516 u.val32[0] = bswap_32(u.val32[0]);
1517 u.val32[1] = bswap_32(u.val32[1]);
1518 }
1519
1520 sample->pid = u.val32[0];
1521 sample->tid = u.val32[1];
dd44bc6b 1522 array--;
d0dd74e8
ACM		 1523 }
1524
1525 return 0;
1526}
1527
03b6ea9b
AH		 1528static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1529 u64 size)
98e1da90 1530{
03b6ea9b
AH		 1531 return size > max_size || offset + size > endp;
1532}
98e1da90 1533
03b6ea9b
AH		 1534#define OVERFLOW_CHECK(offset, size, max_size) \
1535 do { \
1536 if (overflow(endp, (max_size), (offset), (size))) \
1537 return -EFAULT; \
1538 } while (0)
98e1da90 1539
03b6ea9b
AH		 1540#define OVERFLOW_CHECK_u64(offset) \
1541 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
98e1da90 1542
a3f698fe 1543int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
0807d2d8 1544 struct perf_sample *data)
d0dd74e8 1545{
a3f698fe 1546 u64 type = evsel->attr.sample_type;
0807d2d8 1547 bool swapped = evsel->needs_swap;
d0dd74e8 1548 const u64 *array;
03b6ea9b
AH		 1549 u16 max_size = event->header.size;
1550 const void *endp = (void *)event + max_size;
1551 u64 sz;
d0dd74e8 1552
936be503
DA		 1553 /*
1554 * used for cross-endian analysis. See git commit 65014ab3
1555 * for why this goofiness is needed.
1556 */
6a11f92e 1557 union u64_swap u;
936be503 1558
f3bda2c9 1559 memset(data, 0, sizeof(*data));
d0dd74e8
ACM		 1560 data->cpu = data->pid = data->tid = -1;
1561 data->stream_id = data->id = data->time = -1ULL;
bc529086 1562 data->period = evsel->attr.sample_period;
05484298 1563 data->weight = 0;
d0dd74e8
ACM		 1564
1565 if (event->header.type != PERF_RECORD_SAMPLE) {
a3f698fe 1566 if (!evsel->attr.sample_id_all)
d0dd74e8 1567 return 0;
0807d2d8 1568 return perf_evsel__parse_id_sample(evsel, event, data);
d0dd74e8
ACM		 1569 }
1570
1571 array = event->sample.array;
1572
03b6ea9b
AH		 1573 /*
1574 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1575 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1576 * check the format does not go past the end of the event.
1577 */
a3f698fe 1578 if (evsel->sample_size + sizeof(event->header) > event->header.size)
a2854124
FW		 1579 return -EFAULT;
1580
75562573
AH		 1581 data->id = -1ULL;
1582 if (type & PERF_SAMPLE_IDENTIFIER) {
1583 data->id = *array;
1584 array++;
1585 }
1586
d0dd74e8 1587 if (type & PERF_SAMPLE_IP) {
ef89325f 1588 data->ip = *array;
d0dd74e8
ACM		 1589 array++;
1590 }
1591
1592 if (type & PERF_SAMPLE_TID) {
936be503
DA		 1593 u.val64 = *array;
1594 if (swapped) {
1595 /* undo swap of u64, then swap on individual u32s */
1596 u.val64 = bswap_64(u.val64);
1597 u.val32[0] = bswap_32(u.val32[0]);
1598 u.val32[1] = bswap_32(u.val32[1]);
1599 }
1600
1601 data->pid = u.val32[0];
1602 data->tid = u.val32[1];
d0dd74e8
ACM		 1603 array++;
1604 }
1605
1606 if (type & PERF_SAMPLE_TIME) {
1607 data->time = *array;
1608 array++;
1609 }
1610
7cec0922 1611 data->addr = 0;
d0dd74e8
ACM		 1612 if (type & PERF_SAMPLE_ADDR) {
1613 data->addr = *array;
1614 array++;
1615 }
1616
d0dd74e8
ACM		 1617 if (type & PERF_SAMPLE_ID) {
1618 data->id = *array;
1619 array++;
1620 }
1621
1622 if (type & PERF_SAMPLE_STREAM_ID) {
1623 data->stream_id = *array;
1624 array++;
1625 }
1626
1627 if (type & PERF_SAMPLE_CPU) {
936be503
DA		 1628
1629 u.val64 = *array;
1630 if (swapped) {
1631 /* undo swap of u64, then swap on individual u32s */
1632 u.val64 = bswap_64(u.val64);
1633 u.val32[0] = bswap_32(u.val32[0]);
1634 }
1635
1636 data->cpu = u.val32[0];
d0dd74e8
ACM		 1637 array++;
1638 }
1639
1640 if (type & PERF_SAMPLE_PERIOD) {
1641 data->period = *array;
1642 array++;
1643 }
1644
1645 if (type & PERF_SAMPLE_READ) {
9ede473c
JO		 1646 u64 read_format = evsel->attr.read_format;
1647
03b6ea9b 1648 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1649 if (read_format & PERF_FORMAT_GROUP)
1650 data->read.group.nr = *array;
1651 else
1652 data->read.one.value = *array;
1653
1654 array++;
1655
1656 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
03b6ea9b 1657 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1658 data->read.time_enabled = *array;
1659 array++;
1660 }
1661
1662 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
03b6ea9b 1663 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1664 data->read.time_running = *array;
1665 array++;
1666 }
1667
1668 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1669 if (read_format & PERF_FORMAT_GROUP) {
03b6ea9b
AH		 1670 const u64 max_group_nr = UINT64_MAX /
1671 sizeof(struct sample_read_value);
1672
1673 if (data->read.group.nr > max_group_nr)
1674 return -EFAULT;
1675 sz = data->read.group.nr *
1676 sizeof(struct sample_read_value);
1677 OVERFLOW_CHECK(array, sz, max_size);
1678 data->read.group.values =
1679 (struct sample_read_value *)array;
1680 array = (void *)array + sz;
9ede473c 1681 } else {
03b6ea9b 1682 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1683 data->read.one.id = *array;
1684 array++;
1685 }
d0dd74e8
ACM		 1686 }
1687
1688 if (type & PERF_SAMPLE_CALLCHAIN) {
03b6ea9b 1689 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
98e1da90 1690
03b6ea9b
AH		 1691 OVERFLOW_CHECK_u64(array);
1692 data->callchain = (struct ip_callchain *)array++;
1693 if (data->callchain->nr > max_callchain_nr)
98e1da90 1694 return -EFAULT;
03b6ea9b
AH		 1695 sz = data->callchain->nr * sizeof(u64);
1696 OVERFLOW_CHECK(array, sz, max_size);
1697 array = (void *)array + sz;
d0dd74e8
ACM		 1698 }
1699
1700 if (type & PERF_SAMPLE_RAW) {
03b6ea9b 1701 OVERFLOW_CHECK_u64(array);
936be503
DA		 1702 u.val64 = *array;
1703 if (WARN_ONCE(swapped,
1704 "Endianness of raw data not corrected!\n")) {
1705 /* undo swap of u64, then swap on individual u32s */
1706 u.val64 = bswap_64(u.val64);
1707 u.val32[0] = bswap_32(u.val32[0]);
1708 u.val32[1] = bswap_32(u.val32[1]);
1709 }
936be503 1710 data->raw_size = u.val32[0];
03b6ea9b 1711 array = (void *)array + sizeof(u32);
98e1da90 1712
03b6ea9b
AH		 1713 OVERFLOW_CHECK(array, data->raw_size, max_size);
1714 data->raw_data = (void *)array;
1715 array = (void *)array + data->raw_size;
d0dd74e8
ACM		 1716 }
1717
b5387528 1718 if (type & PERF_SAMPLE_BRANCH_STACK) {
03b6ea9b
AH		 1719 const u64 max_branch_nr = UINT64_MAX /
1720 sizeof(struct branch_entry);
b5387528 1721
03b6ea9b
AH		 1722 OVERFLOW_CHECK_u64(array);
1723 data->branch_stack = (struct branch_stack *)array++;
b5387528 1724
03b6ea9b
AH		 1725 if (data->branch_stack->nr > max_branch_nr)
1726 return -EFAULT;
b5387528 1727 sz = data->branch_stack->nr * sizeof(struct branch_entry);
03b6ea9b
AH		 1728 OVERFLOW_CHECK(array, sz, max_size);
1729 array = (void *)array + sz;
b5387528 1730 }
0f6a3015
JO		 1731
1732 if (type & PERF_SAMPLE_REGS_USER) {
03b6ea9b 1733 OVERFLOW_CHECK_u64(array);
5b95a4a3
AH		 1734 data->user_regs.abi = *array;
1735 array++;
0f6a3015 1736
5b95a4a3 1737 if (data->user_regs.abi) {
352ea45a 1738 u64 mask = evsel->attr.sample_regs_user;
03b6ea9b 1739
352ea45a 1740 sz = hweight_long(mask) * sizeof(u64);
03b6ea9b 1741 OVERFLOW_CHECK(array, sz, max_size);
352ea45a 1742 data->user_regs.mask = mask;
0f6a3015 1743 data->user_regs.regs = (u64 *)array;
03b6ea9b 1744 array = (void *)array + sz;
0f6a3015
JO		 1745 }
1746 }
1747
1748 if (type & PERF_SAMPLE_STACK_USER) {
03b6ea9b
AH		 1749 OVERFLOW_CHECK_u64(array);
1750 sz = *array++;
0f6a3015
JO		 1751
1752 data->user_stack.offset = ((char *)(array - 1)
1753 - (char *) event);
1754
03b6ea9b 1755 if (!sz) {
0f6a3015
JO		 1756 data->user_stack.size = 0;
1757 } else {
03b6ea9b 1758 OVERFLOW_CHECK(array, sz, max_size);
0f6a3015 1759 data->user_stack.data = (char *)array;
03b6ea9b
AH		 1760 array = (void *)array + sz;
1761 OVERFLOW_CHECK_u64(array);
54bd2692 1762 data->user_stack.size = *array++;
a65cb4b9
JO		 1763 if (WARN_ONCE(data->user_stack.size > sz,
1764 "user stack dump failure\n"))
1765 return -EFAULT;
0f6a3015
JO		 1766 }
1767 }
1768
05484298
AK		 1769 data->weight = 0;
1770 if (type & PERF_SAMPLE_WEIGHT) {
03b6ea9b 1771 OVERFLOW_CHECK_u64(array);
05484298
AK		 1772 data->weight = *array;
1773 array++;
1774 }
1775
98a3b32c
SE		 1776 data->data_src = PERF_MEM_DATA_SRC_NONE;
1777 if (type & PERF_SAMPLE_DATA_SRC) {
03b6ea9b 1778 OVERFLOW_CHECK_u64(array);
98a3b32c
SE		 1779 data->data_src = *array;
1780 array++;
1781 }
1782
475eeab9
AK		 1783 data->transaction = 0;
1784 if (type & PERF_SAMPLE_TRANSACTION) {
87b95524 1785 OVERFLOW_CHECK_u64(array);
475eeab9
AK		 1786 data->transaction = *array;
1787 array++;
1788 }
1789
6a21c0b5
SE		 1790 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
1791 if (type & PERF_SAMPLE_REGS_INTR) {
1792 OVERFLOW_CHECK_u64(array);
1793 data->intr_regs.abi = *array;
1794 array++;
1795
1796 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
1797 u64 mask = evsel->attr.sample_regs_intr;
1798
1799 sz = hweight_long(mask) * sizeof(u64);
1800 OVERFLOW_CHECK(array, sz, max_size);
1801 data->intr_regs.mask = mask;
1802 data->intr_regs.regs = (u64 *)array;
1803 array = (void *)array + sz;
1804 }
1805 }
1806
d0dd74e8
ACM		 1807 return 0;
1808}
74eec26f 1809
b1cf6f65 1810size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
352ea45a 1811 u64 read_format)
b1cf6f65
AH		 1812{
1813 size_t sz, result = sizeof(struct sample_event);
1814
1815 if (type & PERF_SAMPLE_IDENTIFIER)
1816 result += sizeof(u64);
1817
1818 if (type & PERF_SAMPLE_IP)
1819 result += sizeof(u64);
1820
1821 if (type & PERF_SAMPLE_TID)
1822 result += sizeof(u64);
1823
1824 if (type & PERF_SAMPLE_TIME)
1825 result += sizeof(u64);
1826
1827 if (type & PERF_SAMPLE_ADDR)
1828 result += sizeof(u64);
1829
1830 if (type & PERF_SAMPLE_ID)
1831 result += sizeof(u64);
1832
1833 if (type & PERF_SAMPLE_STREAM_ID)
1834 result += sizeof(u64);
1835
1836 if (type & PERF_SAMPLE_CPU)
1837 result += sizeof(u64);
1838
1839 if (type & PERF_SAMPLE_PERIOD)
1840 result += sizeof(u64);
1841
1842 if (type & PERF_SAMPLE_READ) {
1843 result += sizeof(u64);
1844 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1845 result += sizeof(u64);
1846 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1847 result += sizeof(u64);
1848 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1849 if (read_format & PERF_FORMAT_GROUP) {
1850 sz = sample->read.group.nr *
1851 sizeof(struct sample_read_value);
1852 result += sz;
1853 } else {
1854 result += sizeof(u64);
1855 }
1856 }
1857
1858 if (type & PERF_SAMPLE_CALLCHAIN) {
1859 sz = (sample->callchain->nr + 1) * sizeof(u64);
1860 result += sz;
1861 }
1862
1863 if (type & PERF_SAMPLE_RAW) {
1864 result += sizeof(u32);
1865 result += sample->raw_size;
1866 }
1867
1868 if (type & PERF_SAMPLE_BRANCH_STACK) {
1869 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1870 sz += sizeof(u64);
1871 result += sz;
1872 }
1873
1874 if (type & PERF_SAMPLE_REGS_USER) {
1875 if (sample->user_regs.abi) {
1876 result += sizeof(u64);
352ea45a 1877 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
b1cf6f65
AH		 1878 result += sz;
1879 } else {
1880 result += sizeof(u64);
1881 }
1882 }
1883
1884 if (type & PERF_SAMPLE_STACK_USER) {
1885 sz = sample->user_stack.size;
1886 result += sizeof(u64);
1887 if (sz) {
1888 result += sz;
1889 result += sizeof(u64);
1890 }
1891 }
1892
1893 if (type & PERF_SAMPLE_WEIGHT)
1894 result += sizeof(u64);
1895
1896 if (type & PERF_SAMPLE_DATA_SRC)
1897 result += sizeof(u64);
1898
42d88910
AH		 1899 if (type & PERF_SAMPLE_TRANSACTION)
1900 result += sizeof(u64);
1901
6a21c0b5
SE		 1902 if (type & PERF_SAMPLE_REGS_INTR) {
1903 if (sample->intr_regs.abi) {
1904 result += sizeof(u64);
1905 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
1906 result += sz;
1907 } else {
1908 result += sizeof(u64);
1909 }
1910 }
1911
b1cf6f65
AH		 1912 return result;
1913}
1914
74eec26f 1915int perf_event__synthesize_sample(union perf_event *event, u64 type,
352ea45a 1916 u64 read_format,
74eec26f
AV		 1917 const struct perf_sample *sample,
1918 bool swapped)
1919{
1920 u64 *array;
d03f2170 1921 size_t sz;
74eec26f
AV		 1922 /*
1923 * used for cross-endian analysis. See git commit 65014ab3
1924 * for why this goofiness is needed.
1925 */
6a11f92e 1926 union u64_swap u;
74eec26f
AV		 1927
1928 array = event->sample.array;
1929
75562573
AH		 1930 if (type & PERF_SAMPLE_IDENTIFIER) {
1931 *array = sample->id;
1932 array++;
1933 }
1934
74eec26f 1935 if (type & PERF_SAMPLE_IP) {
ef89325f 1936 *array = sample->ip;
74eec26f
AV		 1937 array++;
1938 }
1939
1940 if (type & PERF_SAMPLE_TID) {
1941 u.val32[0] = sample->pid;
1942 u.val32[1] = sample->tid;
1943 if (swapped) {
1944 /*
a3f698fe 1945 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1946 */
1947 u.val32[0] = bswap_32(u.val32[0]);
1948 u.val32[1] = bswap_32(u.val32[1]);
1949 u.val64 = bswap_64(u.val64);
1950 }
1951
1952 *array = u.val64;
1953 array++;
1954 }
1955
1956 if (type & PERF_SAMPLE_TIME) {
1957 *array = sample->time;
1958 array++;
1959 }
1960
1961 if (type & PERF_SAMPLE_ADDR) {
1962 *array = sample->addr;
1963 array++;
1964 }
1965
1966 if (type & PERF_SAMPLE_ID) {
1967 *array = sample->id;
1968 array++;
1969 }
1970
1971 if (type & PERF_SAMPLE_STREAM_ID) {
1972 *array = sample->stream_id;
1973 array++;
1974 }
1975
1976 if (type & PERF_SAMPLE_CPU) {
1977 u.val32[0] = sample->cpu;
1978 if (swapped) {
1979 /*
a3f698fe 1980 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1981 */
1982 u.val32[0] = bswap_32(u.val32[0]);
1983 u.val64 = bswap_64(u.val64);
1984 }
1985 *array = u.val64;
1986 array++;
1987 }
1988
1989 if (type & PERF_SAMPLE_PERIOD) {
1990 *array = sample->period;
1991 array++;
1992 }
1993
d03f2170
AH		 1994 if (type & PERF_SAMPLE_READ) {
1995 if (read_format & PERF_FORMAT_GROUP)
1996 *array = sample->read.group.nr;
1997 else
1998 *array = sample->read.one.value;
1999 array++;
2000
2001 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2002 *array = sample->read.time_enabled;
2003 array++;
2004 }
2005
2006 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2007 *array = sample->read.time_running;
2008 array++;
2009 }
2010
2011 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2012 if (read_format & PERF_FORMAT_GROUP) {
2013 sz = sample->read.group.nr *
2014 sizeof(struct sample_read_value);
2015 memcpy(array, sample->read.group.values, sz);
2016 array = (void *)array + sz;
2017 } else {
2018 *array = sample->read.one.id;
2019 array++;
2020 }
2021 }
2022
2023 if (type & PERF_SAMPLE_CALLCHAIN) {
2024 sz = (sample->callchain->nr + 1) * sizeof(u64);
2025 memcpy(array, sample->callchain, sz);
2026 array = (void *)array + sz;
2027 }
2028
2029 if (type & PERF_SAMPLE_RAW) {
2030 u.val32[0] = sample->raw_size;
2031 if (WARN_ONCE(swapped,
2032 "Endianness of raw data not corrected!\n")) {
2033 /*
2034 * Inverse of what is done in perf_evsel__parse_sample
2035 */
2036 u.val32[0] = bswap_32(u.val32[0]);
2037 u.val32[1] = bswap_32(u.val32[1]);
2038 u.val64 = bswap_64(u.val64);
2039 }
2040 *array = u.val64;
2041 array = (void *)array + sizeof(u32);
2042
2043 memcpy(array, sample->raw_data, sample->raw_size);
2044 array = (void *)array + sample->raw_size;
2045 }
2046
2047 if (type & PERF_SAMPLE_BRANCH_STACK) {
2048 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
2049 sz += sizeof(u64);
2050 memcpy(array, sample->branch_stack, sz);
2051 array = (void *)array + sz;
2052 }
2053
2054 if (type & PERF_SAMPLE_REGS_USER) {
2055 if (sample->user_regs.abi) {
2056 *array++ = sample->user_regs.abi;
352ea45a 2057 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
d03f2170
AH		 2058 memcpy(array, sample->user_regs.regs, sz);
2059 array = (void *)array + sz;
2060 } else {
2061 *array++ = 0;
2062 }
2063 }
2064
2065 if (type & PERF_SAMPLE_STACK_USER) {
2066 sz = sample->user_stack.size;
2067 *array++ = sz;
2068 if (sz) {
2069 memcpy(array, sample->user_stack.data, sz);
2070 array = (void *)array + sz;
2071 *array++ = sz;
2072 }
2073 }
2074
2075 if (type & PERF_SAMPLE_WEIGHT) {
2076 *array = sample->weight;
2077 array++;
2078 }
2079
2080 if (type & PERF_SAMPLE_DATA_SRC) {
2081 *array = sample->data_src;
2082 array++;
2083 }
2084
42d88910
AH		 2085 if (type & PERF_SAMPLE_TRANSACTION) {
2086 *array = sample->transaction;
2087 array++;
2088 }
2089
6a21c0b5
SE		 2090 if (type & PERF_SAMPLE_REGS_INTR) {
2091 if (sample->intr_regs.abi) {
2092 *array++ = sample->intr_regs.abi;
2093 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2094 memcpy(array, sample->intr_regs.regs, sz);
2095 array = (void *)array + sz;
2096 } else {
2097 *array++ = 0;
2098 }
2099 }
2100
74eec26f
AV		 2101 return 0;
2102}
5555ded4 2103
efd2b924
ACM		 2104struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
2105{
2106 return pevent_find_field(evsel->tp_format, name);
2107}
2108
5d2074ea 2109void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
5555ded4
ACM		 2110 const char *name)
2111{
efd2b924 2112 struct format_field *field = perf_evsel__field(evsel, name);
5555ded4
ACM		 2113 int offset;
2114
efd2b924
ACM		 2115 if (!field)
2116 return NULL;
5555ded4
ACM		 2117
2118 offset = field->offset;
2119
2120 if (field->flags & FIELD_IS_DYNAMIC) {
2121 offset = *(int *)(sample->raw_data + field->offset);
2122 offset &= 0xffff;
2123 }
2124
2125 return sample->raw_data + offset;
2126}
2127
2128u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
2129 const char *name)
2130{
efd2b924 2131 struct format_field *field = perf_evsel__field(evsel, name);
e6b6f679
ACM		 2132 void *ptr;
2133 u64 value;
5555ded4 2134
efd2b924
ACM		 2135 if (!field)
2136 return 0;
5555ded4 2137
e6b6f679 2138 ptr = sample->raw_data + field->offset;
5555ded4 2139
e6b6f679
ACM		 2140 switch (field->size) {
2141 case 1:
2142 return *(u8 *)ptr;
2143 case 2:
2144 value = *(u16 *)ptr;
2145 break;
2146 case 4:
2147 value = *(u32 *)ptr;
2148 break;
2149 case 8:
e94eedab 2150 memcpy(&value, ptr, sizeof(u64));
e6b6f679
ACM		 2151 break;
2152 default:
2153 return 0;
2154 }
2155
2156 if (!evsel->needs_swap)
2157 return value;
2158
2159 switch (field->size) {
2160 case 2:
2161 return bswap_16(value);
2162 case 4:
2163 return bswap_32(value);
2164 case 8:
2165 return bswap_64(value);
2166 default:
2167 return 0;
2168 }
2169
2170 return 0;
5555ded4 2171}
0698aedd
ACM		 2172
2173static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
2174{
2175 va_list args;
2176 int ret = 0;
2177
2178 if (!*first) {
2179 ret += fprintf(fp, ",");
2180 } else {
2181 ret += fprintf(fp, ":");
2182 *first = false;
2183 }
2184
2185 va_start(args, fmt);
2186 ret += vfprintf(fp, fmt, args);
2187 va_end(args);
2188 return ret;
2189}
2190
2c5e8c52 2191static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
c79a4393 2192{
2c5e8c52 2193 return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
c79a4393
ACM		 2194}
2195
0698aedd
ACM		 2196int perf_evsel__fprintf(struct perf_evsel *evsel,
2197 struct perf_attr_details *details, FILE *fp)
2198{
2199 bool first = true;
e6ab07d0
NK		 2200 int printed = 0;
2201
e35ef355 2202 if (details->event_group) {
e6ab07d0
NK		 2203 struct perf_evsel *pos;
2204
2205 if (!perf_evsel__is_group_leader(evsel))
2206 return 0;
2207
2208 if (evsel->nr_members > 1)
2209 printed += fprintf(fp, "%s{", evsel->group_name ?: "");
2210
2211 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
2212 for_each_group_member(pos, evsel)
2213 printed += fprintf(fp, ",%s", perf_evsel__name(pos));
2214
2215 if (evsel->nr_members > 1)
2216 printed += fprintf(fp, "}");
2217 goto out;
2218 }
2219
2220 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
0698aedd 2221
2c5e8c52
PZ		 2222 if (details->verbose) {
2223 printed += perf_event_attr__fprintf(fp, &evsel->attr,
2224 __print_attr__fprintf, &first);
2225 } else if (details->freq) {
4605bb55
NK		 2226 const char *term = "sample_freq";
2227
2228 if (!evsel->attr.freq)
2229 term = "sample_period";
2230
2231 printed += comma_fprintf(fp, &first, " %s=%" PRIu64,
2232 term, (u64)evsel->attr.sample_freq);
0698aedd 2233 }
e6ab07d0 2234out:
0698aedd
ACM		 2235 fputc('\n', fp);
2236 return ++printed;
2237}
c0a54341
ACM		 2238
2239bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2240 char *msg, size_t msgsize)
2241{
2b821cce 2242 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
c0a54341
ACM		 2243 evsel->attr.type == PERF_TYPE_HARDWARE &&
2244 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2245 /*
2246 * If it's cycles then fall back to hrtimer based
2247 * cpu-clock-tick sw counter, which is always available even if
2248 * no PMU support.
2249 *
2250 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2251 * b0a873e).
2252 */
2253 scnprintf(msg, msgsize, "%s",
2254"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2255
2256 evsel->attr.type = PERF_TYPE_SOFTWARE;
2257 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2258
04662523 2259 zfree(&evsel->name);
c0a54341
ACM		 2260 return true;
2261 }
2262
2263 return false;
2264}
56e52e85 2265
602ad878 2266int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
56e52e85
ACM		 2267 int err, char *msg, size_t size)
2268{
6e81c74c
MH		 2269 char sbuf[STRERR_BUFSIZE];
2270
56e52e85
ACM		 2271 switch (err) {
2272 case EPERM:
2273 case EACCES:
b69e63a4 2274 return scnprintf(msg, size,
56e52e85
ACM		 2275 "You may not have permission to collect %sstats.\n"
2276 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
2277 " -1 - Not paranoid at all\n"
2278 " 0 - Disallow raw tracepoint access for unpriv\n"
2279 " 1 - Disallow cpu events for unpriv\n"
2280 " 2 - Disallow kernel profiling for unpriv",
2281 target->system_wide ? "system-wide " : "");
2282 case ENOENT:
2283 return scnprintf(msg, size, "The %s event is not supported.",
2284 perf_evsel__name(evsel));
2285 case EMFILE:
2286 return scnprintf(msg, size, "%s",
2287 "Too many events are opened.\n"
18ffdfe8
JO		 2288 "Probably the maximum number of open file descriptors has been reached.\n"
2289 "Hint: Try again after reducing the number of events.\n"
2290 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
56e52e85
ACM		 2291 case ENODEV:
2292 if (target->cpu_list)
2293 return scnprintf(msg, size, "%s",
2294 "No such device - did you specify an out-of-range profile CPU?\n");
2295 break;
2296 case EOPNOTSUPP:
2297 if (evsel->attr.precise_ip)
2298 return scnprintf(msg, size, "%s",
2299 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2300#if defined(__i386__) || defined(__x86_64__)
2301 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2302 return scnprintf(msg, size, "%s",
2303 "No hardware sampling interrupt available.\n"
2304 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2305#endif
2306 break;
63914aca
JO		 2307 case EBUSY:
2308 if (find_process("oprofiled"))
2309 return scnprintf(msg, size,
2310 "The PMU counters are busy/taken by another profiler.\n"
2311 "We found oprofile daemon running, please stop it and try again.");
2312 break;
814c8c38
PZ		 2313 case EINVAL:
2314 if (perf_missing_features.clockid)
2315 return scnprintf(msg, size, "clockid feature not supported.");
2316 if (perf_missing_features.clockid_wrong)
2317 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2318 break;
56e52e85
ACM		 2319 default:
2320 break;
2321 }
2322
2323 return scnprintf(msg, size,
6e81c74c 2324 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
56e52e85
ACM		 2325 "/bin/dmesg may provide additional information.\n"
2326 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
6e81c74c
MH		 2327 err, strerror_r(err, sbuf, sizeof(sbuf)),
2328 perf_evsel__name(evsel));
56e52e85 2329}
Linux 6.x block layer and io_uring tree(s)