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perf record: Amend option summaries
[deliverable/linux.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"
69aad6f1 29
594ac61a
ACM		 30static struct {
31 bool sample_id_all;
32 bool exclude_guest;
5c5e854b 33 bool mmap2;
57480d2c 34 bool cloexec;
814c8c38
PZ		 35 bool clockid;
36 bool clockid_wrong;
594ac61a
ACM		 37} perf_missing_features;
38
814c8c38
PZ		 39static clockid_t clockid;
40
ce8ccff5
ACM		 41static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
42{
43 return 0;
44}
45
46static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
47{
48}
49
50static struct {
51 size_t size;
52 int (*init)(struct perf_evsel *evsel);
53 void (*fini)(struct perf_evsel *evsel);
54} perf_evsel__object = {
55 .size = sizeof(struct perf_evsel),
56 .init = perf_evsel__no_extra_init,
57 .fini = perf_evsel__no_extra_fini,
58};
59
60int perf_evsel__object_config(size_t object_size,
61 int (*init)(struct perf_evsel *evsel),
62 void (*fini)(struct perf_evsel *evsel))
63{
64
65 if (object_size == 0)
66 goto set_methods;
67
68 if (perf_evsel__object.size > object_size)
69 return -EINVAL;
70
71 perf_evsel__object.size = object_size;
72
73set_methods:
74 if (init != NULL)
75 perf_evsel__object.init = init;
76
77 if (fini != NULL)
78 perf_evsel__object.fini = fini;
79
80 return 0;
81}
82
c52b12ed
ACM		 83#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
84
75562573 85int __perf_evsel__sample_size(u64 sample_type)
c2a70653
ACM		 86{
87 u64 mask = sample_type & PERF_SAMPLE_MASK;
88 int size = 0;
89 int i;
90
91 for (i = 0; i < 64; i++) {
92 if (mask & (1ULL << i))
93 size++;
94 }
95
96 size *= sizeof(u64);
97
98 return size;
99}
100
75562573
AH		 101/**
102 * __perf_evsel__calc_id_pos - calculate id_pos.
103 * @sample_type: sample type
104 *
105 * This function returns the position of the event id (PERF_SAMPLE_ID or
106 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
107 * sample_event.
108 */
109static int __perf_evsel__calc_id_pos(u64 sample_type)
110{
111 int idx = 0;
112
113 if (sample_type & PERF_SAMPLE_IDENTIFIER)
114 return 0;
115
116 if (!(sample_type & PERF_SAMPLE_ID))
117 return -1;
118
119 if (sample_type & PERF_SAMPLE_IP)
120 idx += 1;
121
122 if (sample_type & PERF_SAMPLE_TID)
123 idx += 1;
124
125 if (sample_type & PERF_SAMPLE_TIME)
126 idx += 1;
127
128 if (sample_type & PERF_SAMPLE_ADDR)
129 idx += 1;
130
131 return idx;
132}
133
134/**
135 * __perf_evsel__calc_is_pos - calculate is_pos.
136 * @sample_type: sample type
137 *
138 * This function returns the position (counting backwards) of the event id
139 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
140 * sample_id_all is used there is an id sample appended to non-sample events.
141 */
142static int __perf_evsel__calc_is_pos(u64 sample_type)
143{
144 int idx = 1;
145
146 if (sample_type & PERF_SAMPLE_IDENTIFIER)
147 return 1;
148
149 if (!(sample_type & PERF_SAMPLE_ID))
150 return -1;
151
152 if (sample_type & PERF_SAMPLE_CPU)
153 idx += 1;
154
155 if (sample_type & PERF_SAMPLE_STREAM_ID)
156 idx += 1;
157
158 return idx;
159}
160
161void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
162{
163 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
164 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
165}
166
7be5ebe8
ACM		 167void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
168 enum perf_event_sample_format bit)
169{
170 if (!(evsel->attr.sample_type & bit)) {
171 evsel->attr.sample_type |= bit;
172 evsel->sample_size += sizeof(u64);
75562573 173 perf_evsel__calc_id_pos(evsel);
7be5ebe8
ACM		 174 }
175}
176
177void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
178 enum perf_event_sample_format bit)
179{
180 if (evsel->attr.sample_type & bit) {
181 evsel->attr.sample_type &= ~bit;
182 evsel->sample_size -= sizeof(u64);
75562573 183 perf_evsel__calc_id_pos(evsel);
7be5ebe8
ACM		 184 }
185}
186
75562573
AH		 187void perf_evsel__set_sample_id(struct perf_evsel *evsel,
188 bool can_sample_identifier)
7a5a5ca5 189{
75562573
AH		 190 if (can_sample_identifier) {
191 perf_evsel__reset_sample_bit(evsel, ID);
192 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
193 } else {
194 perf_evsel__set_sample_bit(evsel, ID);
195 }
7a5a5ca5
ACM		 196 evsel->attr.read_format |= PERF_FORMAT_ID;
197}
198
ef1d1af2
ACM		 199void perf_evsel__init(struct perf_evsel *evsel,
200 struct perf_event_attr *attr, int idx)
201{
202 evsel->idx = idx;
60b0896c 203 evsel->tracking = !idx;
ef1d1af2 204 evsel->attr = *attr;
2cfda562 205 evsel->leader = evsel;
410136f5
SE		 206 evsel->unit = "";
207 evsel->scale = 1.0;
ef1d1af2 208 INIT_LIST_HEAD(&evsel->node);
ce8ccff5 209 perf_evsel__object.init(evsel);
bde09467 210 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
75562573 211 perf_evsel__calc_id_pos(evsel);
ef1d1af2
ACM		 212}
213
ef503831 214struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
69aad6f1 215{
ce8ccff5 216 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
69aad6f1 217
ef1d1af2
ACM		 218 if (evsel != NULL)
219 perf_evsel__init(evsel, attr, idx);
69aad6f1
ACM		 220
221 return evsel;
222}
223
ef503831 224struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
efd2b924 225{
ce8ccff5 226 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
efd2b924
ACM		 227
228 if (evsel != NULL) {
229 struct perf_event_attr attr = {
0b80f8b3
ACM		 230 .type = PERF_TYPE_TRACEPOINT,
231 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
232 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
efd2b924
ACM		 233 };
234
e48ffe2b
ACM		 235 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
236 goto out_free;
237
97978b3e 238 evsel->tp_format = trace_event__tp_format(sys, name);
efd2b924
ACM		 239 if (evsel->tp_format == NULL)
240 goto out_free;
241
0b80f8b3 242 event_attr_init(&attr);
efd2b924 243 attr.config = evsel->tp_format->id;
0b80f8b3 244 attr.sample_period = 1;
efd2b924 245 perf_evsel__init(evsel, &attr, idx);
efd2b924
ACM		 246 }
247
248 return evsel;
249
250out_free:
74cf249d 251 zfree(&evsel->name);
efd2b924
ACM		 252 free(evsel);
253 return NULL;
254}
255
8ad7013b 256const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
c410431c
ACM		 257 "cycles",
258 "instructions",
259 "cache-references",
260 "cache-misses",
261 "branches",
262 "branch-misses",
263 "bus-cycles",
264 "stalled-cycles-frontend",
265 "stalled-cycles-backend",
266 "ref-cycles",
267};
268
dd4f5223 269static const char *__perf_evsel__hw_name(u64 config)
c410431c
ACM		 270{
271 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
272 return perf_evsel__hw_names[config];
273
274 return "unknown-hardware";
275}
276
27f18617 277static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
c410431c 278{
27f18617 279 int colon = 0, r = 0;
c410431c 280 struct perf_event_attr *attr = &evsel->attr;
c410431c
ACM		 281 bool exclude_guest_default = false;
282
283#define MOD_PRINT(context, mod) do { \
284 if (!attr->exclude_##context) { \
27f18617 285 if (!colon) colon = ++r; \
c410431c
ACM		 286 r += scnprintf(bf + r, size - r, "%c", mod); \
287 } } while(0)
288
289 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
290 MOD_PRINT(kernel, 'k');
291 MOD_PRINT(user, 'u');
292 MOD_PRINT(hv, 'h');
293 exclude_guest_default = true;
294 }
295
296 if (attr->precise_ip) {
297 if (!colon)
27f18617 298 colon = ++r;
c410431c
ACM		 299 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
300 exclude_guest_default = true;
301 }
302
303 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
304 MOD_PRINT(host, 'H');
305 MOD_PRINT(guest, 'G');
306 }
307#undef MOD_PRINT
308 if (colon)
27f18617 309 bf[colon - 1] = ':';
c410431c
ACM		 310 return r;
311}
312
27f18617
ACM		 313static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
314{
315 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
316 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
317}
318
8ad7013b 319const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
335c2f5d
ACM		 320 "cpu-clock",
321 "task-clock",
322 "page-faults",
323 "context-switches",
8ad7013b 324 "cpu-migrations",
335c2f5d
ACM		 325 "minor-faults",
326 "major-faults",
327 "alignment-faults",
328 "emulation-faults",
d22d1a2a 329 "dummy",
335c2f5d
ACM		 330};
331
dd4f5223 332static const char *__perf_evsel__sw_name(u64 config)
335c2f5d
ACM		 333{
334 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
335 return perf_evsel__sw_names[config];
336 return "unknown-software";
337}
338
339static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
340{
341 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
342 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
343}
344
287e74aa
JO		 345static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
346{
347 int r;
348
349 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
350
351 if (type & HW_BREAKPOINT_R)
352 r += scnprintf(bf + r, size - r, "r");
353
354 if (type & HW_BREAKPOINT_W)
355 r += scnprintf(bf + r, size - r, "w");
356
357 if (type & HW_BREAKPOINT_X)
358 r += scnprintf(bf + r, size - r, "x");
359
360 return r;
361}
362
363static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
364{
365 struct perf_event_attr *attr = &evsel->attr;
366 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
367 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
368}
369
0b668bc9
ACM		 370const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
371 [PERF_EVSEL__MAX_ALIASES] = {
372 { "L1-dcache", "l1-d", "l1d", "L1-data", },
373 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
374 { "LLC", "L2", },
375 { "dTLB", "d-tlb", "Data-TLB", },
376 { "iTLB", "i-tlb", "Instruction-TLB", },
377 { "branch", "branches", "bpu", "btb", "bpc", },
378 { "node", },
379};
380
381const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
382 [PERF_EVSEL__MAX_ALIASES] = {
383 { "load", "loads", "read", },
384 { "store", "stores", "write", },
385 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
386};
387
388const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
389 [PERF_EVSEL__MAX_ALIASES] = {
390 { "refs", "Reference", "ops", "access", },
391 { "misses", "miss", },
392};
393
394#define C(x) PERF_COUNT_HW_CACHE_##x
395#define CACHE_READ (1 << C(OP_READ))
396#define CACHE_WRITE (1 << C(OP_WRITE))
397#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
398#define COP(x) (1 << x)
399
400/*
401 * cache operartion stat
402 * L1I : Read and prefetch only
403 * ITLB and BPU : Read-only
404 */
405static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
406 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
407 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
408 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
409 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
410 [C(ITLB)] = (CACHE_READ),
411 [C(BPU)] = (CACHE_READ),
412 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
413};
414
415bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
416{
417 if (perf_evsel__hw_cache_stat[type] & COP(op))
418 return true; /* valid */
419 else
420 return false; /* invalid */
421}
422
423int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
424 char *bf, size_t size)
425{
426 if (result) {
427 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
428 perf_evsel__hw_cache_op[op][0],
429 perf_evsel__hw_cache_result[result][0]);
430 }
431
432 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
433 perf_evsel__hw_cache_op[op][1]);
434}
435
dd4f5223 436static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
0b668bc9
ACM		 437{
438 u8 op, result, type = (config >> 0) & 0xff;
439 const char *err = "unknown-ext-hardware-cache-type";
440
441 if (type > PERF_COUNT_HW_CACHE_MAX)
442 goto out_err;
443
444 op = (config >> 8) & 0xff;
445 err = "unknown-ext-hardware-cache-op";
446 if (op > PERF_COUNT_HW_CACHE_OP_MAX)
447 goto out_err;
448
449 result = (config >> 16) & 0xff;
450 err = "unknown-ext-hardware-cache-result";
451 if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
452 goto out_err;
453
454 err = "invalid-cache";
455 if (!perf_evsel__is_cache_op_valid(type, op))
456 goto out_err;
457
458 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
459out_err:
460 return scnprintf(bf, size, "%s", err);
461}
462
463static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
464{
465 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
466 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
467}
468
6eef3d9c
ACM		 469static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
470{
471 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
472 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
473}
474
7289f83c 475const char *perf_evsel__name(struct perf_evsel *evsel)
a4460836 476{
7289f83c 477 char bf[128];
a4460836 478
7289f83c
ACM		 479 if (evsel->name)
480 return evsel->name;
c410431c
ACM		 481
482 switch (evsel->attr.type) {
483 case PERF_TYPE_RAW:
6eef3d9c 484 perf_evsel__raw_name(evsel, bf, sizeof(bf));
c410431c
ACM		 485 break;
486
487 case PERF_TYPE_HARDWARE:
7289f83c 488 perf_evsel__hw_name(evsel, bf, sizeof(bf));
c410431c 489 break;
0b668bc9
ACM		 490
491 case PERF_TYPE_HW_CACHE:
7289f83c 492 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
0b668bc9
ACM		 493 break;
494
335c2f5d 495 case PERF_TYPE_SOFTWARE:
7289f83c 496 perf_evsel__sw_name(evsel, bf, sizeof(bf));
335c2f5d
ACM		 497 break;
498
a4460836 499 case PERF_TYPE_TRACEPOINT:
7289f83c 500 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
a4460836
ACM		 501 break;
502
287e74aa
JO		 503 case PERF_TYPE_BREAKPOINT:
504 perf_evsel__bp_name(evsel, bf, sizeof(bf));
505 break;
506
c410431c 507 default:
ca1b1457
RR		 508 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
509 evsel->attr.type);
a4460836 510 break;
c410431c
ACM		 511 }
512
7289f83c
ACM		 513 evsel->name = strdup(bf);
514
515 return evsel->name ?: "unknown";
c410431c
ACM		 516}
517
717e263f
NK		 518const char *perf_evsel__group_name(struct perf_evsel *evsel)
519{
520 return evsel->group_name ?: "anon group";
521}
522
523int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
524{
525 int ret;
526 struct perf_evsel *pos;
527 const char *group_name = perf_evsel__group_name(evsel);
528
529 ret = scnprintf(buf, size, "%s", group_name);
530
531 ret += scnprintf(buf + ret, size - ret, " { %s",
532 perf_evsel__name(evsel));
533
534 for_each_group_member(pos, evsel)
535 ret += scnprintf(buf + ret, size - ret, ", %s",
536 perf_evsel__name(pos));
537
538 ret += scnprintf(buf + ret, size - ret, " }");
539
540 return ret;
541}
542
6bedfab6 543static void
aad2b21c
KL		 544perf_evsel__config_callgraph(struct perf_evsel *evsel,
545 struct record_opts *opts)
6bedfab6
JO		 546{
547 bool function = perf_evsel__is_function_event(evsel);
548 struct perf_event_attr *attr = &evsel->attr;
549
550 perf_evsel__set_sample_bit(evsel, CALLCHAIN);
551
aad2b21c
KL		 552 if (callchain_param.record_mode == CALLCHAIN_LBR) {
553 if (!opts->branch_stack) {
554 if (attr->exclude_user) {
555 pr_warning("LBR callstack option is only available "
556 "to get user callchain information. "
557 "Falling back to framepointers.\n");
558 } else {
559 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
560 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
561 PERF_SAMPLE_BRANCH_CALL_STACK;
562 }
563 } else
564 pr_warning("Cannot use LBR callstack with branch stack. "
565 "Falling back to framepointers.\n");
566 }
567
72a128aa 568 if (callchain_param.record_mode == CALLCHAIN_DWARF) {
6bedfab6
JO		 569 if (!function) {
570 perf_evsel__set_sample_bit(evsel, REGS_USER);
571 perf_evsel__set_sample_bit(evsel, STACK_USER);
572 attr->sample_regs_user = PERF_REGS_MASK;
72a128aa 573 attr->sample_stack_user = callchain_param.dump_size;
6bedfab6
JO		 574 attr->exclude_callchain_user = 1;
575 } else {
576 pr_info("Cannot use DWARF unwind for function trace event,"
577 " falling back to framepointers.\n");
578 }
579 }
580
581 if (function) {
582 pr_info("Disabling user space callchains for function trace event.\n");
583 attr->exclude_callchain_user = 1;
584 }
585}
586
774cb499
JO		 587/*
588 * The enable_on_exec/disabled value strategy:
589 *
590 * 1) For any type of traced program:
591 * - all independent events and group leaders are disabled
592 * - all group members are enabled
593 *
594 * Group members are ruled by group leaders. They need to
595 * be enabled, because the group scheduling relies on that.
596 *
597 * 2) For traced programs executed by perf:
598 * - all independent events and group leaders have
599 * enable_on_exec set
600 * - we don't specifically enable or disable any event during
601 * the record command
602 *
603 * Independent events and group leaders are initially disabled
604 * and get enabled by exec. Group members are ruled by group
605 * leaders as stated in 1).
606 *
607 * 3) For traced programs attached by perf (pid/tid):
608 * - we specifically enable or disable all events during
609 * the record command
610 *
611 * When attaching events to already running traced we
612 * enable/disable events specifically, as there's no
613 * initial traced exec call.
614 */
b4006796 615void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
0f82ebc4 616{
3c176311 617 struct perf_evsel *leader = evsel->leader;
0f82ebc4 618 struct perf_event_attr *attr = &evsel->attr;
60b0896c 619 int track = evsel->tracking;
3aa5939d 620 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
0f82ebc4 621
594ac61a 622 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
0f82ebc4 623 attr->inherit = !opts->no_inherit;
0f82ebc4 624
7be5ebe8
ACM		 625 perf_evsel__set_sample_bit(evsel, IP);
626 perf_evsel__set_sample_bit(evsel, TID);
0f82ebc4 627
3c176311
JO		 628 if (evsel->sample_read) {
629 perf_evsel__set_sample_bit(evsel, READ);
630
631 /*
632 * We need ID even in case of single event, because
633 * PERF_SAMPLE_READ process ID specific data.
634 */
75562573 635 perf_evsel__set_sample_id(evsel, false);
3c176311
JO		 636
637 /*
638 * Apply group format only if we belong to group
639 * with more than one members.
640 */
641 if (leader->nr_members > 1) {
642 attr->read_format |= PERF_FORMAT_GROUP;
643 attr->inherit = 0;
644 }
645 }
646
0f82ebc4 647 /*
17314e23 648 * We default some events to have a default interval. But keep
0f82ebc4
ACM		 649 * it a weak assumption overridable by the user.
650 */
17314e23 651 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
0f82ebc4
ACM		 652 opts->user_interval != ULLONG_MAX)) {
653 if (opts->freq) {
7be5ebe8 654 perf_evsel__set_sample_bit(evsel, PERIOD);
0f82ebc4
ACM		 655 attr->freq = 1;
656 attr->sample_freq = opts->freq;
657 } else {
658 attr->sample_period = opts->default_interval;
659 }
660 }
661
3c176311
JO		 662 /*
663 * Disable sampling for all group members other
664 * than leader in case leader 'leads' the sampling.
665 */
666 if ((leader != evsel) && leader->sample_read) {
667 attr->sample_freq = 0;
668 attr->sample_period = 0;
669 }
670
0f82ebc4
ACM		 671 if (opts->no_samples)
672 attr->sample_freq = 0;
673
674 if (opts->inherit_stat)
675 attr->inherit_stat = 1;
676
677 if (opts->sample_address) {
7be5ebe8 678 perf_evsel__set_sample_bit(evsel, ADDR);
0f82ebc4
ACM		 679 attr->mmap_data = track;
680 }
681
f140373b
JO		 682 /*
683 * We don't allow user space callchains for function trace
684 * event, due to issues with page faults while tracing page
685 * fault handler and its overall trickiness nature.
686 */
687 if (perf_evsel__is_function_event(evsel))
688 evsel->attr.exclude_callchain_user = 1;
689
72a128aa 690 if (callchain_param.enabled && !evsel->no_aux_samples)
aad2b21c 691 perf_evsel__config_callgraph(evsel, opts);
26d33022 692
6a21c0b5
SE		 693 if (opts->sample_intr_regs) {
694 attr->sample_regs_intr = PERF_REGS_MASK;
695 perf_evsel__set_sample_bit(evsel, REGS_INTR);
696 }
697
3aa5939d 698 if (target__has_cpu(&opts->target))
7be5ebe8 699 perf_evsel__set_sample_bit(evsel, CPU);
0f82ebc4 700
3e76ac78 701 if (opts->period)
7be5ebe8 702 perf_evsel__set_sample_bit(evsel, PERIOD);
3e76ac78 703
8affc2b8
AK		 704 /*
705 * When the user explicitely disabled time don't force it here.
706 */
707 if (opts->sample_time &&
708 (!perf_missing_features.sample_id_all &&
709 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu)))
7be5ebe8 710 perf_evsel__set_sample_bit(evsel, TIME);
0f82ebc4 711
6ff1ce76 712 if (opts->raw_samples && !evsel->no_aux_samples) {
7be5ebe8
ACM		 713 perf_evsel__set_sample_bit(evsel, TIME);
714 perf_evsel__set_sample_bit(evsel, RAW);
715 perf_evsel__set_sample_bit(evsel, CPU);
0f82ebc4
ACM		 716 }
717
ccf49bfc 718 if (opts->sample_address)
1e7ed5ec 719 perf_evsel__set_sample_bit(evsel, DATA_SRC);
ccf49bfc 720
509051ea 721 if (opts->no_buffering) {
0f82ebc4
ACM		 722 attr->watermark = 0;
723 attr->wakeup_events = 1;
724 }
6ff1ce76 725 if (opts->branch_stack && !evsel->no_aux_samples) {
7be5ebe8 726 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
bdfebd84
RAV		 727 attr->branch_sample_type = opts->branch_stack;
728 }
0f82ebc4 729
05484298 730 if (opts->sample_weight)
1e7ed5ec 731 perf_evsel__set_sample_bit(evsel, WEIGHT);
05484298 732
62e503b7 733 attr->task = track;
5c5e854b 734 attr->mmap = track;
a5a5ba72 735 attr->mmap2 = track && !perf_missing_features.mmap2;
5c5e854b 736 attr->comm = track;
0f82ebc4 737
475eeab9 738 if (opts->sample_transaction)
1e7ed5ec 739 perf_evsel__set_sample_bit(evsel, TRANSACTION);
475eeab9 740
85c273d2
AK		 741 if (opts->running_time) {
742 evsel->attr.read_format |=
743 PERF_FORMAT_TOTAL_TIME_ENABLED |
744 PERF_FORMAT_TOTAL_TIME_RUNNING;
745 }
746
774cb499
JO		 747 /*
748 * XXX see the function comment above
749 *
750 * Disabling only independent events or group leaders,
751 * keeping group members enabled.
752 */
823254ed 753 if (perf_evsel__is_group_leader(evsel))
774cb499
JO		 754 attr->disabled = 1;
755
756 /*
757 * Setting enable_on_exec for independent events and
758 * group leaders for traced executed by perf.
759 */
6619a53e
AK		 760 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
761 !opts->initial_delay)
0f82ebc4 762 attr->enable_on_exec = 1;
2afd2bcf
AH		 763
764 if (evsel->immediate) {
765 attr->disabled = 0;
766 attr->enable_on_exec = 0;
767 }
814c8c38
PZ		 768
769 clockid = opts->clockid;
770 if (opts->use_clockid) {
771 attr->use_clockid = 1;
772 attr->clockid = opts->clockid;
773 }
0f82ebc4
ACM		 774}
775
8885846f 776static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
69aad6f1 777{
4af4c955 778 int cpu, thread;
bf8e8f4b
AH		 779
780 if (evsel->system_wide)
781 nthreads = 1;
782
69aad6f1 783 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
4af4c955
DA		 784
785 if (evsel->fd) {
786 for (cpu = 0; cpu < ncpus; cpu++) {
787 for (thread = 0; thread < nthreads; thread++) {
788 FD(evsel, cpu, thread) = -1;
789 }
790 }
791 }
792
69aad6f1
ACM		 793 return evsel->fd != NULL ? 0 : -ENOMEM;
794}
795
e2407bef
AK		 796static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
797 int ioc, void *arg)
745cefc5
ACM		 798{
799 int cpu, thread;
800
bf8e8f4b
AH		 801 if (evsel->system_wide)
802 nthreads = 1;
803
745cefc5
ACM		 804 for (cpu = 0; cpu < ncpus; cpu++) {
805 for (thread = 0; thread < nthreads; thread++) {
806 int fd = FD(evsel, cpu, thread),
e2407bef 807 err = ioctl(fd, ioc, arg);
745cefc5
ACM		 808
809 if (err)
810 return err;
811 }
812 }
813
814 return 0;
815}
816
e2407bef
AK		 817int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
818 const char *filter)
819{
820 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
821 PERF_EVENT_IOC_SET_FILTER,
822 (void *)filter);
823}
824
825int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
826{
827 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
828 PERF_EVENT_IOC_ENABLE,
829 0);
830}
831
70db7533
ACM		 832int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
833{
8d9cbd8f
VG		 834 if (ncpus == 0 || nthreads == 0)
835 return 0;
836
bf8e8f4b
AH		 837 if (evsel->system_wide)
838 nthreads = 1;
839
a91e5431
ACM		 840 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
841 if (evsel->sample_id == NULL)
842 return -ENOMEM;
843
844 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
845 if (evsel->id == NULL) {
846 xyarray__delete(evsel->sample_id);
847 evsel->sample_id = NULL;
848 return -ENOMEM;
849 }
850
851 return 0;
70db7533
ACM		 852}
853
a7e191c3
FD		 854void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus)
855{
856 memset(evsel->counts, 0, (sizeof(*evsel->counts) +
857 (ncpus * sizeof(struct perf_counts_values))));
858}
859
c52b12ed
ACM		 860int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
861{
862 evsel->counts = zalloc((sizeof(*evsel->counts) +
863 (ncpus * sizeof(struct perf_counts_values))));
864 return evsel->counts != NULL ? 0 : -ENOMEM;
865}
866
8885846f 867static void perf_evsel__free_fd(struct perf_evsel *evsel)
69aad6f1
ACM		 868{
869 xyarray__delete(evsel->fd);
870 evsel->fd = NULL;
871}
872
8885846f 873static void perf_evsel__free_id(struct perf_evsel *evsel)
70db7533 874{
a91e5431
ACM		 875 xyarray__delete(evsel->sample_id);
876 evsel->sample_id = NULL;
04662523 877 zfree(&evsel->id);
70db7533
ACM		 878}
879
c52b12ed
ACM		 880void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
881{
882 int cpu, thread;
883
bf8e8f4b
AH		 884 if (evsel->system_wide)
885 nthreads = 1;
886
c52b12ed
ACM		 887 for (cpu = 0; cpu < ncpus; cpu++)
888 for (thread = 0; thread < nthreads; ++thread) {
889 close(FD(evsel, cpu, thread));
890 FD(evsel, cpu, thread) = -1;
891 }
892}
893
43f8e76e
NK		 894void perf_evsel__free_counts(struct perf_evsel *evsel)
895{
74cf249d 896 zfree(&evsel->counts);
43f8e76e
NK		 897}
898
ef1d1af2 899void perf_evsel__exit(struct perf_evsel *evsel)
69aad6f1
ACM		 900{
901 assert(list_empty(&evsel->node));
736b05a0
NK		 902 perf_evsel__free_fd(evsel);
903 perf_evsel__free_id(evsel);
597e48c1
ACM		 904 close_cgroup(evsel->cgrp);
905 zfree(&evsel->group_name);
597e48c1 906 zfree(&evsel->name);
ce8ccff5 907 perf_evsel__object.fini(evsel);
ef1d1af2
ACM		 908}
909
910void perf_evsel__delete(struct perf_evsel *evsel)
911{
912 perf_evsel__exit(evsel);
69aad6f1
ACM		 913 free(evsel);
914}
c52b12ed 915
857a94a2
JO		 916void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu,
917 struct perf_counts_values *count)
c7a79c47
SE		 918{
919 struct perf_counts_values tmp;
920
921 if (!evsel->prev_raw_counts)
922 return;
923
924 if (cpu == -1) {
925 tmp = evsel->prev_raw_counts->aggr;
926 evsel->prev_raw_counts->aggr = *count;
927 } else {
928 tmp = evsel->prev_raw_counts->cpu[cpu];
929 evsel->prev_raw_counts->cpu[cpu] = *count;
930 }
931
932 count->val = count->val - tmp.val;
933 count->ena = count->ena - tmp.ena;
934 count->run = count->run - tmp.run;
935}
936
13112bbf
JO		 937void perf_counts_values__scale(struct perf_counts_values *count,
938 bool scale, s8 *pscaled)
939{
940 s8 scaled = 0;
941
942 if (scale) {
943 if (count->run == 0) {
944 scaled = -1;
945 count->val = 0;
946 } else if (count->run < count->ena) {
947 scaled = 1;
948 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
949 }
950 } else
951 count->ena = count->run = 0;
952
953 if (pscaled)
954 *pscaled = scaled;
955}
956
011dccbd
JO		 957int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread,
958 perf_evsel__read_cb_t cb)
959{
960 struct perf_counts_values count;
961
962 memset(&count, 0, sizeof(count));
963
964 if (FD(evsel, cpu, thread) < 0)
965 return -EINVAL;
966
967 if (readn(FD(evsel, cpu, thread), &count, sizeof(count)) < 0)
968 return -errno;
969
970 return cb(evsel, cpu, thread, &count);
971}
972
c52b12ed
ACM		 973int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
974 int cpu, int thread, bool scale)
975{
976 struct perf_counts_values count;
977 size_t nv = scale ? 3 : 1;
978
979 if (FD(evsel, cpu, thread) < 0)
980 return -EINVAL;
981
4eed11d5
ACM		 982 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
983 return -ENOMEM;
984
c52b12ed
ACM		 985 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
986 return -errno;
987
857a94a2 988 perf_evsel__compute_deltas(evsel, cpu, &count);
13112bbf 989 perf_counts_values__scale(&count, scale, NULL);
c52b12ed
ACM		 990 evsel->counts->cpu[cpu] = count;
991 return 0;
992}
993
6a4bb04c
JO		 994static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
995{
996 struct perf_evsel *leader = evsel->leader;
997 int fd;
998
823254ed 999 if (perf_evsel__is_group_leader(evsel))
6a4bb04c
JO		 1000 return -1;
1001
1002 /*
1003 * Leader must be already processed/open,
1004 * if not it's a bug.
1005 */
1006 BUG_ON(!leader->fd);
1007
1008 fd = FD(leader, cpu, thread);
1009 BUG_ON(fd == -1);
1010
1011 return fd;
1012}
1013
2c5e8c52
PZ		 1014struct bit_names {
1015 int bit;
1016 const char *name;
1017};
1018
1019static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
1020{
1021 bool first_bit = true;
1022 int i = 0;
1023
1024 do {
1025 if (value & bits[i].bit) {
1026 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1027 first_bit = false;
1028 }
1029 } while (bits[++i].name != NULL);
1030}
1031
1032static void __p_sample_type(char *buf, size_t size, u64 value)
1033{
1034#define bit_name(n) { PERF_SAMPLE_##n, #n }
1035 struct bit_names bits[] = {
1036 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1037 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1038 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1039 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1040 bit_name(IDENTIFIER), bit_name(REGS_INTR),
1041 { .name = NULL, }
1042 };
1043#undef bit_name
1044 __p_bits(buf, size, value, bits);
1045}
1046
1047static void __p_read_format(char *buf, size_t size, u64 value)
1048{
1049#define bit_name(n) { PERF_FORMAT_##n, #n }
1050 struct bit_names bits[] = {
1051 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1052 bit_name(ID), bit_name(GROUP),
1053 { .name = NULL, }
1054 };
1055#undef bit_name
1056 __p_bits(buf, size, value, bits);
1057}
1058
1059#define BUF_SIZE 1024
1060
1061#define p_hex(val) snprintf(buf, BUF_SIZE, "%"PRIx64, (uint64_t)(val))
1062#define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1063#define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1064#define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1065#define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
1066
1067#define PRINT_ATTRn(_n, _f, _p) \
1068do { \
1069 if (attr->_f) { \
1070 _p(attr->_f); \
1071 ret += attr__fprintf(fp, _n, buf, priv);\
1072 } \
1073} while (0)
1074
1075#define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1076
1077int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1078 attr__fprintf_f attr__fprintf, void *priv)
1079{
1080 char buf[BUF_SIZE];
1081 int ret = 0;
1082
1083 PRINT_ATTRf(type, p_unsigned);
1084 PRINT_ATTRf(size, p_unsigned);
1085 PRINT_ATTRf(config, p_hex);
1086 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1087 PRINT_ATTRf(sample_type, p_sample_type);
1088 PRINT_ATTRf(read_format, p_read_format);
1089
1090 PRINT_ATTRf(disabled, p_unsigned);
1091 PRINT_ATTRf(inherit, p_unsigned);
1092 PRINT_ATTRf(pinned, p_unsigned);
1093 PRINT_ATTRf(exclusive, p_unsigned);
1094 PRINT_ATTRf(exclude_user, p_unsigned);
1095 PRINT_ATTRf(exclude_kernel, p_unsigned);
1096 PRINT_ATTRf(exclude_hv, p_unsigned);
1097 PRINT_ATTRf(exclude_idle, p_unsigned);
1098 PRINT_ATTRf(mmap, p_unsigned);
1099 PRINT_ATTRf(comm, p_unsigned);
1100 PRINT_ATTRf(freq, p_unsigned);
1101 PRINT_ATTRf(inherit_stat, p_unsigned);
1102 PRINT_ATTRf(enable_on_exec, p_unsigned);
1103 PRINT_ATTRf(task, p_unsigned);
1104 PRINT_ATTRf(watermark, p_unsigned);
1105 PRINT_ATTRf(precise_ip, p_unsigned);
1106 PRINT_ATTRf(mmap_data, p_unsigned);
1107 PRINT_ATTRf(sample_id_all, p_unsigned);
1108 PRINT_ATTRf(exclude_host, p_unsigned);
1109 PRINT_ATTRf(exclude_guest, p_unsigned);
1110 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1111 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1112 PRINT_ATTRf(mmap2, p_unsigned);
1113 PRINT_ATTRf(comm_exec, p_unsigned);
1114 PRINT_ATTRf(use_clockid, p_unsigned);
1115
1116 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1117 PRINT_ATTRf(bp_type, p_unsigned);
1118 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1119 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1120 PRINT_ATTRf(sample_regs_user, p_hex);
1121 PRINT_ATTRf(sample_stack_user, p_unsigned);
1122 PRINT_ATTRf(clockid, p_signed);
1123 PRINT_ATTRf(sample_regs_intr, p_hex);
70d73de4 1124 PRINT_ATTRf(aux_watermark, p_unsigned);
e3e1a54f
AH		 1125
1126 return ret;
1127}
1128
2c5e8c52
PZ		 1129static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1130 void *priv __attribute__((unused)))
1131{
1132 return fprintf(fp, " %-32s %s\n", name, val);
1133}
1134
0252208e 1135static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 1136 struct thread_map *threads)
48290609 1137{
bf8e8f4b 1138 int cpu, thread, nthreads;
57480d2c 1139 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
727ab04e 1140 int pid = -1, err;
bec19672 1141 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
48290609 1142
bf8e8f4b
AH		 1143 if (evsel->system_wide)
1144 nthreads = 1;
1145 else
1146 nthreads = threads->nr;
1147
0252208e 1148 if (evsel->fd == NULL &&
bf8e8f4b 1149 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
727ab04e 1150 return -ENOMEM;
4eed11d5 1151
023695d9 1152 if (evsel->cgrp) {
57480d2c 1153 flags |= PERF_FLAG_PID_CGROUP;
023695d9
SE		 1154 pid = evsel->cgrp->fd;
1155 }
1156
594ac61a 1157fallback_missing_features:
814c8c38
PZ		 1158 if (perf_missing_features.clockid_wrong)
1159 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1160 if (perf_missing_features.clockid) {
1161 evsel->attr.use_clockid = 0;
1162 evsel->attr.clockid = 0;
1163 }
57480d2c
YD		 1164 if (perf_missing_features.cloexec)
1165 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
5c5e854b
SE		 1166 if (perf_missing_features.mmap2)
1167 evsel->attr.mmap2 = 0;
594ac61a
ACM		 1168 if (perf_missing_features.exclude_guest)
1169 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1170retry_sample_id:
1171 if (perf_missing_features.sample_id_all)
1172 evsel->attr.sample_id_all = 0;
1173
2c5e8c52
PZ		 1174 if (verbose >= 2) {
1175 fprintf(stderr, "%.60s\n", graph_dotted_line);
1176 fprintf(stderr, "perf_event_attr:\n");
1177 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1178 fprintf(stderr, "%.60s\n", graph_dotted_line);
1179 }
e3e1a54f 1180
86bd5e86 1181 for (cpu = 0; cpu < cpus->nr; cpu++) {
9d04f178 1182
bf8e8f4b 1183 for (thread = 0; thread < nthreads; thread++) {
6a4bb04c 1184 int group_fd;
023695d9 1185
bf8e8f4b 1186 if (!evsel->cgrp && !evsel->system_wide)
023695d9
SE		 1187 pid = threads->map[thread];
1188
6a4bb04c 1189 group_fd = get_group_fd(evsel, cpu, thread);
bec19672 1190retry_open:
a33f6efc 1191 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
e3e1a54f
AH		 1192 pid, cpus->map[cpu], group_fd, flags);
1193
0252208e 1194 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
023695d9 1195 pid,
f08199d3 1196 cpus->map[cpu],
023695d9 1197 group_fd, flags);
727ab04e
ACM		 1198 if (FD(evsel, cpu, thread) < 0) {
1199 err = -errno;
a33f6efc 1200 pr_debug2("sys_perf_event_open failed, error %d\n",
f852fd62 1201 err);
594ac61a 1202 goto try_fallback;
727ab04e 1203 }
bec19672 1204 set_rlimit = NO_CHANGE;
814c8c38
PZ		 1205
1206 /*
1207 * If we succeeded but had to kill clockid, fail and
1208 * have perf_evsel__open_strerror() print us a nice
1209 * error.
1210 */
1211 if (perf_missing_features.clockid ||
1212 perf_missing_features.clockid_wrong) {
1213 err = -EINVAL;
1214 goto out_close;
1215 }
0252208e 1216 }
48290609
ACM		 1217 }
1218
1219 return 0;
1220
594ac61a 1221try_fallback:
bec19672
AK		 1222 /*
1223 * perf stat needs between 5 and 22 fds per CPU. When we run out
1224 * of them try to increase the limits.
1225 */
1226 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1227 struct rlimit l;
1228 int old_errno = errno;
1229
1230 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1231 if (set_rlimit == NO_CHANGE)
1232 l.rlim_cur = l.rlim_max;
1233 else {
1234 l.rlim_cur = l.rlim_max + 1000;
1235 l.rlim_max = l.rlim_cur;
1236 }
1237 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1238 set_rlimit++;
1239 errno = old_errno;
1240 goto retry_open;
1241 }
1242 }
1243 errno = old_errno;
1244 }
1245
594ac61a
ACM		 1246 if (err != -EINVAL || cpu > 0 || thread > 0)
1247 goto out_close;
1248
814c8c38
PZ		 1249 /*
1250 * Must probe features in the order they were added to the
1251 * perf_event_attr interface.
1252 */
1253 if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1254 perf_missing_features.clockid_wrong = true;
1255 goto fallback_missing_features;
1256 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1257 perf_missing_features.clockid = true;
1258 goto fallback_missing_features;
1259 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
57480d2c
YD		 1260 perf_missing_features.cloexec = true;
1261 goto fallback_missing_features;
1262 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
5c5e854b
SE		 1263 perf_missing_features.mmap2 = true;
1264 goto fallback_missing_features;
1265 } else if (!perf_missing_features.exclude_guest &&
1266 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
594ac61a
ACM		 1267 perf_missing_features.exclude_guest = true;
1268 goto fallback_missing_features;
1269 } else if (!perf_missing_features.sample_id_all) {
1270 perf_missing_features.sample_id_all = true;
1271 goto retry_sample_id;
1272 }
1273
48290609 1274out_close:
0252208e
ACM		 1275 do {
1276 while (--thread >= 0) {
1277 close(FD(evsel, cpu, thread));
1278 FD(evsel, cpu, thread) = -1;
1279 }
bf8e8f4b 1280 thread = nthreads;
0252208e 1281 } while (--cpu >= 0);
727ab04e
ACM		 1282 return err;
1283}
1284
1285void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1286{
1287 if (evsel->fd == NULL)
1288 return;
1289
1290 perf_evsel__close_fd(evsel, ncpus, nthreads);
1291 perf_evsel__free_fd(evsel);
48290609
ACM		 1292}
1293
0252208e
ACM		 1294static struct {
1295 struct cpu_map map;
1296 int cpus[1];
1297} empty_cpu_map = {
1298 .map.nr = 1,
1299 .cpus = { -1, },
1300};
1301
1302static struct {
1303 struct thread_map map;
1304 int threads[1];
1305} empty_thread_map = {
1306 .map.nr = 1,
1307 .threads = { -1, },
1308};
1309
f08199d3 1310int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
6a4bb04c 1311 struct thread_map *threads)
48290609 1312{
0252208e
ACM		 1313 if (cpus == NULL) {
1314 /* Work around old compiler warnings about strict aliasing */
1315 cpus = &empty_cpu_map.map;
48290609
ACM		 1316 }
1317
0252208e
ACM		 1318 if (threads == NULL)
1319 threads = &empty_thread_map.map;
48290609 1320
6a4bb04c 1321 return __perf_evsel__open(evsel, cpus, threads);
48290609
ACM		 1322}
1323
f08199d3 1324int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
6a4bb04c 1325 struct cpu_map *cpus)
48290609 1326{
6a4bb04c 1327 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
0252208e 1328}
48290609 1329
f08199d3 1330int perf_evsel__open_per_thread(struct perf_evsel *evsel,
6a4bb04c 1331 struct thread_map *threads)
0252208e 1332{
6a4bb04c 1333 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
48290609 1334}
70082dd9 1335
0807d2d8
ACM		 1336static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1337 const union perf_event *event,
1338 struct perf_sample *sample)
d0dd74e8 1339{
0807d2d8 1340 u64 type = evsel->attr.sample_type;
d0dd74e8 1341 const u64 *array = event->sample.array;
0807d2d8 1342 bool swapped = evsel->needs_swap;
37073f9e 1343 union u64_swap u;
d0dd74e8
ACM		 1344
1345 array += ((event->header.size -
1346 sizeof(event->header)) / sizeof(u64)) - 1;
1347
75562573
AH		 1348 if (type & PERF_SAMPLE_IDENTIFIER) {
1349 sample->id = *array;
1350 array--;
1351 }
1352
d0dd74e8 1353 if (type & PERF_SAMPLE_CPU) {
37073f9e
JO		 1354 u.val64 = *array;
1355 if (swapped) {
1356 /* undo swap of u64, then swap on individual u32s */
1357 u.val64 = bswap_64(u.val64);
1358 u.val32[0] = bswap_32(u.val32[0]);
1359 }
1360
1361 sample->cpu = u.val32[0];
d0dd74e8
ACM		 1362 array--;
1363 }
1364
1365 if (type & PERF_SAMPLE_STREAM_ID) {
1366 sample->stream_id = *array;
1367 array--;
1368 }
1369
1370 if (type & PERF_SAMPLE_ID) {
1371 sample->id = *array;
1372 array--;
1373 }
1374
1375 if (type & PERF_SAMPLE_TIME) {
1376 sample->time = *array;
1377 array--;
1378 }
1379
1380 if (type & PERF_SAMPLE_TID) {
37073f9e
JO		 1381 u.val64 = *array;
1382 if (swapped) {
1383 /* undo swap of u64, then swap on individual u32s */
1384 u.val64 = bswap_64(u.val64);
1385 u.val32[0] = bswap_32(u.val32[0]);
1386 u.val32[1] = bswap_32(u.val32[1]);
1387 }
1388
1389 sample->pid = u.val32[0];
1390 sample->tid = u.val32[1];
dd44bc6b 1391 array--;
d0dd74e8
ACM		 1392 }
1393
1394 return 0;
1395}
1396
03b6ea9b
AH		 1397static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1398 u64 size)
98e1da90 1399{
03b6ea9b
AH		 1400 return size > max_size || offset + size > endp;
1401}
98e1da90 1402
03b6ea9b
AH		 1403#define OVERFLOW_CHECK(offset, size, max_size) \
1404 do { \
1405 if (overflow(endp, (max_size), (offset), (size))) \
1406 return -EFAULT; \
1407 } while (0)
98e1da90 1408
03b6ea9b
AH		 1409#define OVERFLOW_CHECK_u64(offset) \
1410 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
98e1da90 1411
a3f698fe 1412int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
0807d2d8 1413 struct perf_sample *data)
d0dd74e8 1414{
a3f698fe 1415 u64 type = evsel->attr.sample_type;
0807d2d8 1416 bool swapped = evsel->needs_swap;
d0dd74e8 1417 const u64 *array;
03b6ea9b
AH		 1418 u16 max_size = event->header.size;
1419 const void *endp = (void *)event + max_size;
1420 u64 sz;
d0dd74e8 1421
936be503
DA		 1422 /*
1423 * used for cross-endian analysis. See git commit 65014ab3
1424 * for why this goofiness is needed.
1425 */
6a11f92e 1426 union u64_swap u;
936be503 1427
f3bda2c9 1428 memset(data, 0, sizeof(*data));
d0dd74e8
ACM		 1429 data->cpu = data->pid = data->tid = -1;
1430 data->stream_id = data->id = data->time = -1ULL;
bc529086 1431 data->period = evsel->attr.sample_period;
05484298 1432 data->weight = 0;
d0dd74e8
ACM		 1433
1434 if (event->header.type != PERF_RECORD_SAMPLE) {
a3f698fe 1435 if (!evsel->attr.sample_id_all)
d0dd74e8 1436 return 0;
0807d2d8 1437 return perf_evsel__parse_id_sample(evsel, event, data);
d0dd74e8
ACM		 1438 }
1439
1440 array = event->sample.array;
1441
03b6ea9b
AH		 1442 /*
1443 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1444 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1445 * check the format does not go past the end of the event.
1446 */
a3f698fe 1447 if (evsel->sample_size + sizeof(event->header) > event->header.size)
a2854124
FW		 1448 return -EFAULT;
1449
75562573
AH		 1450 data->id = -1ULL;
1451 if (type & PERF_SAMPLE_IDENTIFIER) {
1452 data->id = *array;
1453 array++;
1454 }
1455
d0dd74e8 1456 if (type & PERF_SAMPLE_IP) {
ef89325f 1457 data->ip = *array;
d0dd74e8
ACM		 1458 array++;
1459 }
1460
1461 if (type & PERF_SAMPLE_TID) {
936be503
DA		 1462 u.val64 = *array;
1463 if (swapped) {
1464 /* undo swap of u64, then swap on individual u32s */
1465 u.val64 = bswap_64(u.val64);
1466 u.val32[0] = bswap_32(u.val32[0]);
1467 u.val32[1] = bswap_32(u.val32[1]);
1468 }
1469
1470 data->pid = u.val32[0];
1471 data->tid = u.val32[1];
d0dd74e8
ACM		 1472 array++;
1473 }
1474
1475 if (type & PERF_SAMPLE_TIME) {
1476 data->time = *array;
1477 array++;
1478 }
1479
7cec0922 1480 data->addr = 0;
d0dd74e8
ACM		 1481 if (type & PERF_SAMPLE_ADDR) {
1482 data->addr = *array;
1483 array++;
1484 }
1485
d0dd74e8
ACM		 1486 if (type & PERF_SAMPLE_ID) {
1487 data->id = *array;
1488 array++;
1489 }
1490
1491 if (type & PERF_SAMPLE_STREAM_ID) {
1492 data->stream_id = *array;
1493 array++;
1494 }
1495
1496 if (type & PERF_SAMPLE_CPU) {
936be503
DA		 1497
1498 u.val64 = *array;
1499 if (swapped) {
1500 /* undo swap of u64, then swap on individual u32s */
1501 u.val64 = bswap_64(u.val64);
1502 u.val32[0] = bswap_32(u.val32[0]);
1503 }
1504
1505 data->cpu = u.val32[0];
d0dd74e8
ACM		 1506 array++;
1507 }
1508
1509 if (type & PERF_SAMPLE_PERIOD) {
1510 data->period = *array;
1511 array++;
1512 }
1513
1514 if (type & PERF_SAMPLE_READ) {
9ede473c
JO		 1515 u64 read_format = evsel->attr.read_format;
1516
03b6ea9b 1517 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1518 if (read_format & PERF_FORMAT_GROUP)
1519 data->read.group.nr = *array;
1520 else
1521 data->read.one.value = *array;
1522
1523 array++;
1524
1525 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
03b6ea9b 1526 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1527 data->read.time_enabled = *array;
1528 array++;
1529 }
1530
1531 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
03b6ea9b 1532 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1533 data->read.time_running = *array;
1534 array++;
1535 }
1536
1537 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1538 if (read_format & PERF_FORMAT_GROUP) {
03b6ea9b
AH		 1539 const u64 max_group_nr = UINT64_MAX /
1540 sizeof(struct sample_read_value);
1541
1542 if (data->read.group.nr > max_group_nr)
1543 return -EFAULT;
1544 sz = data->read.group.nr *
1545 sizeof(struct sample_read_value);
1546 OVERFLOW_CHECK(array, sz, max_size);
1547 data->read.group.values =
1548 (struct sample_read_value *)array;
1549 array = (void *)array + sz;
9ede473c 1550 } else {
03b6ea9b 1551 OVERFLOW_CHECK_u64(array);
9ede473c
JO		 1552 data->read.one.id = *array;
1553 array++;
1554 }
d0dd74e8
ACM		 1555 }
1556
1557 if (type & PERF_SAMPLE_CALLCHAIN) {
03b6ea9b 1558 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
98e1da90 1559
03b6ea9b
AH		 1560 OVERFLOW_CHECK_u64(array);
1561 data->callchain = (struct ip_callchain *)array++;
1562 if (data->callchain->nr > max_callchain_nr)
98e1da90 1563 return -EFAULT;
03b6ea9b
AH		 1564 sz = data->callchain->nr * sizeof(u64);
1565 OVERFLOW_CHECK(array, sz, max_size);
1566 array = (void *)array + sz;
d0dd74e8
ACM		 1567 }
1568
1569 if (type & PERF_SAMPLE_RAW) {
03b6ea9b 1570 OVERFLOW_CHECK_u64(array);
936be503
DA		 1571 u.val64 = *array;
1572 if (WARN_ONCE(swapped,
1573 "Endianness of raw data not corrected!\n")) {
1574 /* undo swap of u64, then swap on individual u32s */
1575 u.val64 = bswap_64(u.val64);
1576 u.val32[0] = bswap_32(u.val32[0]);
1577 u.val32[1] = bswap_32(u.val32[1]);
1578 }
936be503 1579 data->raw_size = u.val32[0];
03b6ea9b 1580 array = (void *)array + sizeof(u32);
98e1da90 1581
03b6ea9b
AH		 1582 OVERFLOW_CHECK(array, data->raw_size, max_size);
1583 data->raw_data = (void *)array;
1584 array = (void *)array + data->raw_size;
d0dd74e8
ACM		 1585 }
1586
b5387528 1587 if (type & PERF_SAMPLE_BRANCH_STACK) {
03b6ea9b
AH		 1588 const u64 max_branch_nr = UINT64_MAX /
1589 sizeof(struct branch_entry);
b5387528 1590
03b6ea9b
AH		 1591 OVERFLOW_CHECK_u64(array);
1592 data->branch_stack = (struct branch_stack *)array++;
b5387528 1593
03b6ea9b
AH		 1594 if (data->branch_stack->nr > max_branch_nr)
1595 return -EFAULT;
b5387528 1596 sz = data->branch_stack->nr * sizeof(struct branch_entry);
03b6ea9b
AH		 1597 OVERFLOW_CHECK(array, sz, max_size);
1598 array = (void *)array + sz;
b5387528 1599 }
0f6a3015
JO		 1600
1601 if (type & PERF_SAMPLE_REGS_USER) {
03b6ea9b 1602 OVERFLOW_CHECK_u64(array);
5b95a4a3
AH		 1603 data->user_regs.abi = *array;
1604 array++;
0f6a3015 1605
5b95a4a3 1606 if (data->user_regs.abi) {
352ea45a 1607 u64 mask = evsel->attr.sample_regs_user;
03b6ea9b 1608
352ea45a 1609 sz = hweight_long(mask) * sizeof(u64);
03b6ea9b 1610 OVERFLOW_CHECK(array, sz, max_size);
352ea45a 1611 data->user_regs.mask = mask;
0f6a3015 1612 data->user_regs.regs = (u64 *)array;
03b6ea9b 1613 array = (void *)array + sz;
0f6a3015
JO		 1614 }
1615 }
1616
1617 if (type & PERF_SAMPLE_STACK_USER) {
03b6ea9b
AH		 1618 OVERFLOW_CHECK_u64(array);
1619 sz = *array++;
0f6a3015
JO		 1620
1621 data->user_stack.offset = ((char *)(array - 1)
1622 - (char *) event);
1623
03b6ea9b 1624 if (!sz) {
0f6a3015
JO		 1625 data->user_stack.size = 0;
1626 } else {
03b6ea9b 1627 OVERFLOW_CHECK(array, sz, max_size);
0f6a3015 1628 data->user_stack.data = (char *)array;
03b6ea9b
AH		 1629 array = (void *)array + sz;
1630 OVERFLOW_CHECK_u64(array);
54bd2692 1631 data->user_stack.size = *array++;
a65cb4b9
JO		 1632 if (WARN_ONCE(data->user_stack.size > sz,
1633 "user stack dump failure\n"))
1634 return -EFAULT;
0f6a3015
JO		 1635 }
1636 }
1637
05484298
AK		 1638 data->weight = 0;
1639 if (type & PERF_SAMPLE_WEIGHT) {
03b6ea9b 1640 OVERFLOW_CHECK_u64(array);
05484298
AK		 1641 data->weight = *array;
1642 array++;
1643 }
1644
98a3b32c
SE		 1645 data->data_src = PERF_MEM_DATA_SRC_NONE;
1646 if (type & PERF_SAMPLE_DATA_SRC) {
03b6ea9b 1647 OVERFLOW_CHECK_u64(array);
98a3b32c
SE		 1648 data->data_src = *array;
1649 array++;
1650 }
1651
475eeab9
AK		 1652 data->transaction = 0;
1653 if (type & PERF_SAMPLE_TRANSACTION) {
87b95524 1654 OVERFLOW_CHECK_u64(array);
475eeab9
AK		 1655 data->transaction = *array;
1656 array++;
1657 }
1658
6a21c0b5
SE		 1659 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
1660 if (type & PERF_SAMPLE_REGS_INTR) {
1661 OVERFLOW_CHECK_u64(array);
1662 data->intr_regs.abi = *array;
1663 array++;
1664
1665 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
1666 u64 mask = evsel->attr.sample_regs_intr;
1667
1668 sz = hweight_long(mask) * sizeof(u64);
1669 OVERFLOW_CHECK(array, sz, max_size);
1670 data->intr_regs.mask = mask;
1671 data->intr_regs.regs = (u64 *)array;
1672 array = (void *)array + sz;
1673 }
1674 }
1675
d0dd74e8
ACM		 1676 return 0;
1677}
74eec26f 1678
b1cf6f65 1679size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
352ea45a 1680 u64 read_format)
b1cf6f65
AH		 1681{
1682 size_t sz, result = sizeof(struct sample_event);
1683
1684 if (type & PERF_SAMPLE_IDENTIFIER)
1685 result += sizeof(u64);
1686
1687 if (type & PERF_SAMPLE_IP)
1688 result += sizeof(u64);
1689
1690 if (type & PERF_SAMPLE_TID)
1691 result += sizeof(u64);
1692
1693 if (type & PERF_SAMPLE_TIME)
1694 result += sizeof(u64);
1695
1696 if (type & PERF_SAMPLE_ADDR)
1697 result += sizeof(u64);
1698
1699 if (type & PERF_SAMPLE_ID)
1700 result += sizeof(u64);
1701
1702 if (type & PERF_SAMPLE_STREAM_ID)
1703 result += sizeof(u64);
1704
1705 if (type & PERF_SAMPLE_CPU)
1706 result += sizeof(u64);
1707
1708 if (type & PERF_SAMPLE_PERIOD)
1709 result += sizeof(u64);
1710
1711 if (type & PERF_SAMPLE_READ) {
1712 result += sizeof(u64);
1713 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1714 result += sizeof(u64);
1715 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1716 result += sizeof(u64);
1717 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1718 if (read_format & PERF_FORMAT_GROUP) {
1719 sz = sample->read.group.nr *
1720 sizeof(struct sample_read_value);
1721 result += sz;
1722 } else {
1723 result += sizeof(u64);
1724 }
1725 }
1726
1727 if (type & PERF_SAMPLE_CALLCHAIN) {
1728 sz = (sample->callchain->nr + 1) * sizeof(u64);
1729 result += sz;
1730 }
1731
1732 if (type & PERF_SAMPLE_RAW) {
1733 result += sizeof(u32);
1734 result += sample->raw_size;
1735 }
1736
1737 if (type & PERF_SAMPLE_BRANCH_STACK) {
1738 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1739 sz += sizeof(u64);
1740 result += sz;
1741 }
1742
1743 if (type & PERF_SAMPLE_REGS_USER) {
1744 if (sample->user_regs.abi) {
1745 result += sizeof(u64);
352ea45a 1746 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
b1cf6f65
AH		 1747 result += sz;
1748 } else {
1749 result += sizeof(u64);
1750 }
1751 }
1752
1753 if (type & PERF_SAMPLE_STACK_USER) {
1754 sz = sample->user_stack.size;
1755 result += sizeof(u64);
1756 if (sz) {
1757 result += sz;
1758 result += sizeof(u64);
1759 }
1760 }
1761
1762 if (type & PERF_SAMPLE_WEIGHT)
1763 result += sizeof(u64);
1764
1765 if (type & PERF_SAMPLE_DATA_SRC)
1766 result += sizeof(u64);
1767
42d88910
AH		 1768 if (type & PERF_SAMPLE_TRANSACTION)
1769 result += sizeof(u64);
1770
6a21c0b5
SE		 1771 if (type & PERF_SAMPLE_REGS_INTR) {
1772 if (sample->intr_regs.abi) {
1773 result += sizeof(u64);
1774 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
1775 result += sz;
1776 } else {
1777 result += sizeof(u64);
1778 }
1779 }
1780
b1cf6f65
AH		 1781 return result;
1782}
1783
74eec26f 1784int perf_event__synthesize_sample(union perf_event *event, u64 type,
352ea45a 1785 u64 read_format,
74eec26f
AV		 1786 const struct perf_sample *sample,
1787 bool swapped)
1788{
1789 u64 *array;
d03f2170 1790 size_t sz;
74eec26f
AV		 1791 /*
1792 * used for cross-endian analysis. See git commit 65014ab3
1793 * for why this goofiness is needed.
1794 */
6a11f92e 1795 union u64_swap u;
74eec26f
AV		 1796
1797 array = event->sample.array;
1798
75562573
AH		 1799 if (type & PERF_SAMPLE_IDENTIFIER) {
1800 *array = sample->id;
1801 array++;
1802 }
1803
74eec26f 1804 if (type & PERF_SAMPLE_IP) {
ef89325f 1805 *array = sample->ip;
74eec26f
AV		 1806 array++;
1807 }
1808
1809 if (type & PERF_SAMPLE_TID) {
1810 u.val32[0] = sample->pid;
1811 u.val32[1] = sample->tid;
1812 if (swapped) {
1813 /*
a3f698fe 1814 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1815 */
1816 u.val32[0] = bswap_32(u.val32[0]);
1817 u.val32[1] = bswap_32(u.val32[1]);
1818 u.val64 = bswap_64(u.val64);
1819 }
1820
1821 *array = u.val64;
1822 array++;
1823 }
1824
1825 if (type & PERF_SAMPLE_TIME) {
1826 *array = sample->time;
1827 array++;
1828 }
1829
1830 if (type & PERF_SAMPLE_ADDR) {
1831 *array = sample->addr;
1832 array++;
1833 }
1834
1835 if (type & PERF_SAMPLE_ID) {
1836 *array = sample->id;
1837 array++;
1838 }
1839
1840 if (type & PERF_SAMPLE_STREAM_ID) {
1841 *array = sample->stream_id;
1842 array++;
1843 }
1844
1845 if (type & PERF_SAMPLE_CPU) {
1846 u.val32[0] = sample->cpu;
1847 if (swapped) {
1848 /*
a3f698fe 1849 * Inverse of what is done in perf_evsel__parse_sample
74eec26f
AV		 1850 */
1851 u.val32[0] = bswap_32(u.val32[0]);
1852 u.val64 = bswap_64(u.val64);
1853 }
1854 *array = u.val64;
1855 array++;
1856 }
1857
1858 if (type & PERF_SAMPLE_PERIOD) {
1859 *array = sample->period;
1860 array++;
1861 }
1862
d03f2170
AH		 1863 if (type & PERF_SAMPLE_READ) {
1864 if (read_format & PERF_FORMAT_GROUP)
1865 *array = sample->read.group.nr;
1866 else
1867 *array = sample->read.one.value;
1868 array++;
1869
1870 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1871 *array = sample->read.time_enabled;
1872 array++;
1873 }
1874
1875 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1876 *array = sample->read.time_running;
1877 array++;
1878 }
1879
1880 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1881 if (read_format & PERF_FORMAT_GROUP) {
1882 sz = sample->read.group.nr *
1883 sizeof(struct sample_read_value);
1884 memcpy(array, sample->read.group.values, sz);
1885 array = (void *)array + sz;
1886 } else {
1887 *array = sample->read.one.id;
1888 array++;
1889 }
1890 }
1891
1892 if (type & PERF_SAMPLE_CALLCHAIN) {
1893 sz = (sample->callchain->nr + 1) * sizeof(u64);
1894 memcpy(array, sample->callchain, sz);
1895 array = (void *)array + sz;
1896 }
1897
1898 if (type & PERF_SAMPLE_RAW) {
1899 u.val32[0] = sample->raw_size;
1900 if (WARN_ONCE(swapped,
1901 "Endianness of raw data not corrected!\n")) {
1902 /*
1903 * Inverse of what is done in perf_evsel__parse_sample
1904 */
1905 u.val32[0] = bswap_32(u.val32[0]);
1906 u.val32[1] = bswap_32(u.val32[1]);
1907 u.val64 = bswap_64(u.val64);
1908 }
1909 *array = u.val64;
1910 array = (void *)array + sizeof(u32);
1911
1912 memcpy(array, sample->raw_data, sample->raw_size);
1913 array = (void *)array + sample->raw_size;
1914 }
1915
1916 if (type & PERF_SAMPLE_BRANCH_STACK) {
1917 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1918 sz += sizeof(u64);
1919 memcpy(array, sample->branch_stack, sz);
1920 array = (void *)array + sz;
1921 }
1922
1923 if (type & PERF_SAMPLE_REGS_USER) {
1924 if (sample->user_regs.abi) {
1925 *array++ = sample->user_regs.abi;
352ea45a 1926 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
d03f2170
AH		 1927 memcpy(array, sample->user_regs.regs, sz);
1928 array = (void *)array + sz;
1929 } else {
1930 *array++ = 0;
1931 }
1932 }
1933
1934 if (type & PERF_SAMPLE_STACK_USER) {
1935 sz = sample->user_stack.size;
1936 *array++ = sz;
1937 if (sz) {
1938 memcpy(array, sample->user_stack.data, sz);
1939 array = (void *)array + sz;
1940 *array++ = sz;
1941 }
1942 }
1943
1944 if (type & PERF_SAMPLE_WEIGHT) {
1945 *array = sample->weight;
1946 array++;
1947 }
1948
1949 if (type & PERF_SAMPLE_DATA_SRC) {
1950 *array = sample->data_src;
1951 array++;
1952 }
1953
42d88910
AH		 1954 if (type & PERF_SAMPLE_TRANSACTION) {
1955 *array = sample->transaction;
1956 array++;
1957 }
1958
6a21c0b5
SE		 1959 if (type & PERF_SAMPLE_REGS_INTR) {
1960 if (sample->intr_regs.abi) {
1961 *array++ = sample->intr_regs.abi;
1962 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
1963 memcpy(array, sample->intr_regs.regs, sz);
1964 array = (void *)array + sz;
1965 } else {
1966 *array++ = 0;
1967 }
1968 }
1969
74eec26f
AV		 1970 return 0;
1971}
5555ded4 1972
efd2b924
ACM		 1973struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
1974{
1975 return pevent_find_field(evsel->tp_format, name);
1976}
1977
5d2074ea 1978void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
5555ded4
ACM		 1979 const char *name)
1980{
efd2b924 1981 struct format_field *field = perf_evsel__field(evsel, name);
5555ded4
ACM		 1982 int offset;
1983
efd2b924
ACM		 1984 if (!field)
1985 return NULL;
5555ded4
ACM		 1986
1987 offset = field->offset;
1988
1989 if (field->flags & FIELD_IS_DYNAMIC) {
1990 offset = *(int *)(sample->raw_data + field->offset);
1991 offset &= 0xffff;
1992 }
1993
1994 return sample->raw_data + offset;
1995}
1996
1997u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
1998 const char *name)
1999{
efd2b924 2000 struct format_field *field = perf_evsel__field(evsel, name);
e6b6f679
ACM		 2001 void *ptr;
2002 u64 value;
5555ded4 2003
efd2b924
ACM		 2004 if (!field)
2005 return 0;
5555ded4 2006
e6b6f679 2007 ptr = sample->raw_data + field->offset;
5555ded4 2008
e6b6f679
ACM		 2009 switch (field->size) {
2010 case 1:
2011 return *(u8 *)ptr;
2012 case 2:
2013 value = *(u16 *)ptr;
2014 break;
2015 case 4:
2016 value = *(u32 *)ptr;
2017 break;
2018 case 8:
e94eedab 2019 memcpy(&value, ptr, sizeof(u64));
e6b6f679
ACM		 2020 break;
2021 default:
2022 return 0;
2023 }
2024
2025 if (!evsel->needs_swap)
2026 return value;
2027
2028 switch (field->size) {
2029 case 2:
2030 return bswap_16(value);
2031 case 4:
2032 return bswap_32(value);
2033 case 8:
2034 return bswap_64(value);
2035 default:
2036 return 0;
2037 }
2038
2039 return 0;
5555ded4 2040}
0698aedd
ACM		 2041
2042static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
2043{
2044 va_list args;
2045 int ret = 0;
2046
2047 if (!*first) {
2048 ret += fprintf(fp, ",");
2049 } else {
2050 ret += fprintf(fp, ":");
2051 *first = false;
2052 }
2053
2054 va_start(args, fmt);
2055 ret += vfprintf(fp, fmt, args);
2056 va_end(args);
2057 return ret;
2058}
2059
2c5e8c52 2060static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
c79a4393 2061{
2c5e8c52 2062 return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
c79a4393
ACM		 2063}
2064
0698aedd
ACM		 2065int perf_evsel__fprintf(struct perf_evsel *evsel,
2066 struct perf_attr_details *details, FILE *fp)
2067{
2068 bool first = true;
e6ab07d0
NK		 2069 int printed = 0;
2070
e35ef355 2071 if (details->event_group) {
e6ab07d0
NK		 2072 struct perf_evsel *pos;
2073
2074 if (!perf_evsel__is_group_leader(evsel))
2075 return 0;
2076
2077 if (evsel->nr_members > 1)
2078 printed += fprintf(fp, "%s{", evsel->group_name ?: "");
2079
2080 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
2081 for_each_group_member(pos, evsel)
2082 printed += fprintf(fp, ",%s", perf_evsel__name(pos));
2083
2084 if (evsel->nr_members > 1)
2085 printed += fprintf(fp, "}");
2086 goto out;
2087 }
2088
2089 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
0698aedd 2090
2c5e8c52
PZ		 2091 if (details->verbose) {
2092 printed += perf_event_attr__fprintf(fp, &evsel->attr,
2093 __print_attr__fprintf, &first);
2094 } else if (details->freq) {
0698aedd
ACM		 2095 printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64,
2096 (u64)evsel->attr.sample_freq);
2097 }
e6ab07d0 2098out:
0698aedd
ACM		 2099 fputc('\n', fp);
2100 return ++printed;
2101}
c0a54341
ACM		 2102
2103bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2104 char *msg, size_t msgsize)
2105{
2b821cce 2106 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
c0a54341
ACM		 2107 evsel->attr.type == PERF_TYPE_HARDWARE &&
2108 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2109 /*
2110 * If it's cycles then fall back to hrtimer based
2111 * cpu-clock-tick sw counter, which is always available even if
2112 * no PMU support.
2113 *
2114 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2115 * b0a873e).
2116 */
2117 scnprintf(msg, msgsize, "%s",
2118"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2119
2120 evsel->attr.type = PERF_TYPE_SOFTWARE;
2121 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2122
04662523 2123 zfree(&evsel->name);
c0a54341
ACM		 2124 return true;
2125 }
2126
2127 return false;
2128}
56e52e85 2129
602ad878 2130int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
56e52e85
ACM		 2131 int err, char *msg, size_t size)
2132{
6e81c74c
MH		 2133 char sbuf[STRERR_BUFSIZE];
2134
56e52e85
ACM		 2135 switch (err) {
2136 case EPERM:
2137 case EACCES:
b69e63a4 2138 return scnprintf(msg, size,
56e52e85
ACM		 2139 "You may not have permission to collect %sstats.\n"
2140 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
2141 " -1 - Not paranoid at all\n"
2142 " 0 - Disallow raw tracepoint access for unpriv\n"
2143 " 1 - Disallow cpu events for unpriv\n"
2144 " 2 - Disallow kernel profiling for unpriv",
2145 target->system_wide ? "system-wide " : "");
2146 case ENOENT:
2147 return scnprintf(msg, size, "The %s event is not supported.",
2148 perf_evsel__name(evsel));
2149 case EMFILE:
2150 return scnprintf(msg, size, "%s",
2151 "Too many events are opened.\n"
18ffdfe8
JO		 2152 "Probably the maximum number of open file descriptors has been reached.\n"
2153 "Hint: Try again after reducing the number of events.\n"
2154 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
56e52e85
ACM		 2155 case ENODEV:
2156 if (target->cpu_list)
2157 return scnprintf(msg, size, "%s",
2158 "No such device - did you specify an out-of-range profile CPU?\n");
2159 break;
2160 case EOPNOTSUPP:
2161 if (evsel->attr.precise_ip)
2162 return scnprintf(msg, size, "%s",
2163 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2164#if defined(__i386__) || defined(__x86_64__)
2165 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2166 return scnprintf(msg, size, "%s",
2167 "No hardware sampling interrupt available.\n"
2168 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2169#endif
2170 break;
63914aca
JO		 2171 case EBUSY:
2172 if (find_process("oprofiled"))
2173 return scnprintf(msg, size,
2174 "The PMU counters are busy/taken by another profiler.\n"
2175 "We found oprofile daemon running, please stop it and try again.");
2176 break;
814c8c38
PZ		 2177 case EINVAL:
2178 if (perf_missing_features.clockid)
2179 return scnprintf(msg, size, "clockid feature not supported.");
2180 if (perf_missing_features.clockid_wrong)
2181 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2182 break;
56e52e85
ACM		 2183 default:
2184 break;
2185 }
2186
2187 return scnprintf(msg, size,
6e81c74c 2188 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
56e52e85
ACM		 2189 "/bin/dmesg may provide additional information.\n"
2190 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
6e81c74c
MH		 2191 err, strerror_r(err, sbuf, sizeof(sbuf)),
2192 perf_evsel__name(evsel));
56e52e85 2193}
Linux kernel - Deliverables
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