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Commit | Line | Data |
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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> |
85c66be1 | 12 | #include <lk/debugfs.h> |
4e319027 RR |
13 | #include <traceevent/event-parse.h> |
14 | #include <linux/hw_breakpoint.h> | |
15 | #include <linux/perf_event.h> | |
16 | #include "asm/bug.h" | |
69aad6f1 | 17 | #include "evsel.h" |
70082dd9 | 18 | #include "evlist.h" |
69aad6f1 | 19 | #include "util.h" |
86bd5e86 | 20 | #include "cpumap.h" |
fd78260b | 21 | #include "thread_map.h" |
12864b31 | 22 | #include "target.h" |
26d33022 | 23 | #include "perf_regs.h" |
69aad6f1 | 24 | |
594ac61a ACM |
25 | static struct { |
26 | bool sample_id_all; | |
27 | bool exclude_guest; | |
28 | } perf_missing_features; | |
29 | ||
c52b12ed ACM |
30 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
31 | ||
bde09467 | 32 | static int __perf_evsel__sample_size(u64 sample_type) |
c2a70653 ACM |
33 | { |
34 | u64 mask = sample_type & PERF_SAMPLE_MASK; | |
35 | int size = 0; | |
36 | int i; | |
37 | ||
38 | for (i = 0; i < 64; i++) { | |
39 | if (mask & (1ULL << i)) | |
40 | size++; | |
41 | } | |
42 | ||
43 | size *= sizeof(u64); | |
44 | ||
45 | return size; | |
46 | } | |
47 | ||
4bf9ce1b | 48 | void hists__init(struct hists *hists) |
0e2a5f10 ACM |
49 | { |
50 | memset(hists, 0, sizeof(*hists)); | |
51 | hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT; | |
52 | hists->entries_in = &hists->entries_in_array[0]; | |
53 | hists->entries_collapsed = RB_ROOT; | |
54 | hists->entries = RB_ROOT; | |
55 | pthread_mutex_init(&hists->lock, NULL); | |
56 | } | |
57 | ||
7be5ebe8 ACM |
58 | void __perf_evsel__set_sample_bit(struct perf_evsel *evsel, |
59 | enum perf_event_sample_format bit) | |
60 | { | |
61 | if (!(evsel->attr.sample_type & bit)) { | |
62 | evsel->attr.sample_type |= bit; | |
63 | evsel->sample_size += sizeof(u64); | |
64 | } | |
65 | } | |
66 | ||
67 | void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel, | |
68 | enum perf_event_sample_format bit) | |
69 | { | |
70 | if (evsel->attr.sample_type & bit) { | |
71 | evsel->attr.sample_type &= ~bit; | |
72 | evsel->sample_size -= sizeof(u64); | |
73 | } | |
74 | } | |
75 | ||
7a5a5ca5 ACM |
76 | void perf_evsel__set_sample_id(struct perf_evsel *evsel) |
77 | { | |
78 | perf_evsel__set_sample_bit(evsel, ID); | |
79 | evsel->attr.read_format |= PERF_FORMAT_ID; | |
80 | } | |
81 | ||
ef1d1af2 ACM |
82 | void perf_evsel__init(struct perf_evsel *evsel, |
83 | struct perf_event_attr *attr, int idx) | |
84 | { | |
85 | evsel->idx = idx; | |
86 | evsel->attr = *attr; | |
2cfda562 | 87 | evsel->leader = evsel; |
ef1d1af2 | 88 | INIT_LIST_HEAD(&evsel->node); |
1980c2eb | 89 | hists__init(&evsel->hists); |
bde09467 | 90 | evsel->sample_size = __perf_evsel__sample_size(attr->sample_type); |
ef1d1af2 ACM |
91 | } |
92 | ||
23a2f3ab | 93 | struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx) |
69aad6f1 ACM |
94 | { |
95 | struct perf_evsel *evsel = zalloc(sizeof(*evsel)); | |
96 | ||
ef1d1af2 ACM |
97 | if (evsel != NULL) |
98 | perf_evsel__init(evsel, attr, idx); | |
69aad6f1 ACM |
99 | |
100 | return evsel; | |
101 | } | |
102 | ||
201b7334 | 103 | struct event_format *event_format__new(const char *sys, const char *name) |
efd2b924 ACM |
104 | { |
105 | int fd, n; | |
106 | char *filename; | |
107 | void *bf = NULL, *nbf; | |
108 | size_t size = 0, alloc_size = 0; | |
109 | struct event_format *format = NULL; | |
110 | ||
111 | if (asprintf(&filename, "%s/%s/%s/format", tracing_events_path, sys, name) < 0) | |
112 | goto out; | |
113 | ||
114 | fd = open(filename, O_RDONLY); | |
115 | if (fd < 0) | |
116 | goto out_free_filename; | |
117 | ||
118 | do { | |
119 | if (size == alloc_size) { | |
120 | alloc_size += BUFSIZ; | |
121 | nbf = realloc(bf, alloc_size); | |
122 | if (nbf == NULL) | |
123 | goto out_free_bf; | |
124 | bf = nbf; | |
125 | } | |
126 | ||
7cab84e8 | 127 | n = read(fd, bf + size, alloc_size - size); |
efd2b924 ACM |
128 | if (n < 0) |
129 | goto out_free_bf; | |
130 | size += n; | |
131 | } while (n > 0); | |
132 | ||
133 | pevent_parse_format(&format, bf, size, sys); | |
134 | ||
135 | out_free_bf: | |
136 | free(bf); | |
137 | close(fd); | |
138 | out_free_filename: | |
139 | free(filename); | |
140 | out: | |
141 | return format; | |
142 | } | |
143 | ||
144 | struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx) | |
145 | { | |
146 | struct perf_evsel *evsel = zalloc(sizeof(*evsel)); | |
147 | ||
148 | if (evsel != NULL) { | |
149 | struct perf_event_attr attr = { | |
0b80f8b3 ACM |
150 | .type = PERF_TYPE_TRACEPOINT, |
151 | .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | | |
152 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
efd2b924 ACM |
153 | }; |
154 | ||
e48ffe2b ACM |
155 | if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) |
156 | goto out_free; | |
157 | ||
efd2b924 ACM |
158 | evsel->tp_format = event_format__new(sys, name); |
159 | if (evsel->tp_format == NULL) | |
160 | goto out_free; | |
161 | ||
0b80f8b3 | 162 | event_attr_init(&attr); |
efd2b924 | 163 | attr.config = evsel->tp_format->id; |
0b80f8b3 | 164 | attr.sample_period = 1; |
efd2b924 | 165 | perf_evsel__init(evsel, &attr, idx); |
efd2b924 ACM |
166 | } |
167 | ||
168 | return evsel; | |
169 | ||
170 | out_free: | |
e48ffe2b | 171 | free(evsel->name); |
efd2b924 ACM |
172 | free(evsel); |
173 | return NULL; | |
174 | } | |
175 | ||
8ad7013b | 176 | const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = { |
c410431c ACM |
177 | "cycles", |
178 | "instructions", | |
179 | "cache-references", | |
180 | "cache-misses", | |
181 | "branches", | |
182 | "branch-misses", | |
183 | "bus-cycles", | |
184 | "stalled-cycles-frontend", | |
185 | "stalled-cycles-backend", | |
186 | "ref-cycles", | |
187 | }; | |
188 | ||
dd4f5223 | 189 | static const char *__perf_evsel__hw_name(u64 config) |
c410431c ACM |
190 | { |
191 | if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config]) | |
192 | return perf_evsel__hw_names[config]; | |
193 | ||
194 | return "unknown-hardware"; | |
195 | } | |
196 | ||
27f18617 | 197 | static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size) |
c410431c | 198 | { |
27f18617 | 199 | int colon = 0, r = 0; |
c410431c | 200 | struct perf_event_attr *attr = &evsel->attr; |
c410431c ACM |
201 | bool exclude_guest_default = false; |
202 | ||
203 | #define MOD_PRINT(context, mod) do { \ | |
204 | if (!attr->exclude_##context) { \ | |
27f18617 | 205 | if (!colon) colon = ++r; \ |
c410431c ACM |
206 | r += scnprintf(bf + r, size - r, "%c", mod); \ |
207 | } } while(0) | |
208 | ||
209 | if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { | |
210 | MOD_PRINT(kernel, 'k'); | |
211 | MOD_PRINT(user, 'u'); | |
212 | MOD_PRINT(hv, 'h'); | |
213 | exclude_guest_default = true; | |
214 | } | |
215 | ||
216 | if (attr->precise_ip) { | |
217 | if (!colon) | |
27f18617 | 218 | colon = ++r; |
c410431c ACM |
219 | r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); |
220 | exclude_guest_default = true; | |
221 | } | |
222 | ||
223 | if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { | |
224 | MOD_PRINT(host, 'H'); | |
225 | MOD_PRINT(guest, 'G'); | |
226 | } | |
227 | #undef MOD_PRINT | |
228 | if (colon) | |
27f18617 | 229 | bf[colon - 1] = ':'; |
c410431c ACM |
230 | return r; |
231 | } | |
232 | ||
27f18617 ACM |
233 | static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size) |
234 | { | |
235 | int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config)); | |
236 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
237 | } | |
238 | ||
8ad7013b | 239 | const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = { |
335c2f5d ACM |
240 | "cpu-clock", |
241 | "task-clock", | |
242 | "page-faults", | |
243 | "context-switches", | |
8ad7013b | 244 | "cpu-migrations", |
335c2f5d ACM |
245 | "minor-faults", |
246 | "major-faults", | |
247 | "alignment-faults", | |
248 | "emulation-faults", | |
249 | }; | |
250 | ||
dd4f5223 | 251 | static const char *__perf_evsel__sw_name(u64 config) |
335c2f5d ACM |
252 | { |
253 | if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config]) | |
254 | return perf_evsel__sw_names[config]; | |
255 | return "unknown-software"; | |
256 | } | |
257 | ||
258 | static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size) | |
259 | { | |
260 | int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config)); | |
261 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
262 | } | |
263 | ||
287e74aa JO |
264 | static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) |
265 | { | |
266 | int r; | |
267 | ||
268 | r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); | |
269 | ||
270 | if (type & HW_BREAKPOINT_R) | |
271 | r += scnprintf(bf + r, size - r, "r"); | |
272 | ||
273 | if (type & HW_BREAKPOINT_W) | |
274 | r += scnprintf(bf + r, size - r, "w"); | |
275 | ||
276 | if (type & HW_BREAKPOINT_X) | |
277 | r += scnprintf(bf + r, size - r, "x"); | |
278 | ||
279 | return r; | |
280 | } | |
281 | ||
282 | static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size) | |
283 | { | |
284 | struct perf_event_attr *attr = &evsel->attr; | |
285 | int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); | |
286 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
287 | } | |
288 | ||
0b668bc9 ACM |
289 | const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX] |
290 | [PERF_EVSEL__MAX_ALIASES] = { | |
291 | { "L1-dcache", "l1-d", "l1d", "L1-data", }, | |
292 | { "L1-icache", "l1-i", "l1i", "L1-instruction", }, | |
293 | { "LLC", "L2", }, | |
294 | { "dTLB", "d-tlb", "Data-TLB", }, | |
295 | { "iTLB", "i-tlb", "Instruction-TLB", }, | |
296 | { "branch", "branches", "bpu", "btb", "bpc", }, | |
297 | { "node", }, | |
298 | }; | |
299 | ||
300 | const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX] | |
301 | [PERF_EVSEL__MAX_ALIASES] = { | |
302 | { "load", "loads", "read", }, | |
303 | { "store", "stores", "write", }, | |
304 | { "prefetch", "prefetches", "speculative-read", "speculative-load", }, | |
305 | }; | |
306 | ||
307 | const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX] | |
308 | [PERF_EVSEL__MAX_ALIASES] = { | |
309 | { "refs", "Reference", "ops", "access", }, | |
310 | { "misses", "miss", }, | |
311 | }; | |
312 | ||
313 | #define C(x) PERF_COUNT_HW_CACHE_##x | |
314 | #define CACHE_READ (1 << C(OP_READ)) | |
315 | #define CACHE_WRITE (1 << C(OP_WRITE)) | |
316 | #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) | |
317 | #define COP(x) (1 << x) | |
318 | ||
319 | /* | |
320 | * cache operartion stat | |
321 | * L1I : Read and prefetch only | |
322 | * ITLB and BPU : Read-only | |
323 | */ | |
324 | static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = { | |
325 | [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
326 | [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), | |
327 | [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
328 | [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
329 | [C(ITLB)] = (CACHE_READ), | |
330 | [C(BPU)] = (CACHE_READ), | |
331 | [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
332 | }; | |
333 | ||
334 | bool perf_evsel__is_cache_op_valid(u8 type, u8 op) | |
335 | { | |
336 | if (perf_evsel__hw_cache_stat[type] & COP(op)) | |
337 | return true; /* valid */ | |
338 | else | |
339 | return false; /* invalid */ | |
340 | } | |
341 | ||
342 | int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, | |
343 | char *bf, size_t size) | |
344 | { | |
345 | if (result) { | |
346 | return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0], | |
347 | perf_evsel__hw_cache_op[op][0], | |
348 | perf_evsel__hw_cache_result[result][0]); | |
349 | } | |
350 | ||
351 | return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0], | |
352 | perf_evsel__hw_cache_op[op][1]); | |
353 | } | |
354 | ||
dd4f5223 | 355 | static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size) |
0b668bc9 ACM |
356 | { |
357 | u8 op, result, type = (config >> 0) & 0xff; | |
358 | const char *err = "unknown-ext-hardware-cache-type"; | |
359 | ||
360 | if (type > PERF_COUNT_HW_CACHE_MAX) | |
361 | goto out_err; | |
362 | ||
363 | op = (config >> 8) & 0xff; | |
364 | err = "unknown-ext-hardware-cache-op"; | |
365 | if (op > PERF_COUNT_HW_CACHE_OP_MAX) | |
366 | goto out_err; | |
367 | ||
368 | result = (config >> 16) & 0xff; | |
369 | err = "unknown-ext-hardware-cache-result"; | |
370 | if (result > PERF_COUNT_HW_CACHE_RESULT_MAX) | |
371 | goto out_err; | |
372 | ||
373 | err = "invalid-cache"; | |
374 | if (!perf_evsel__is_cache_op_valid(type, op)) | |
375 | goto out_err; | |
376 | ||
377 | return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size); | |
378 | out_err: | |
379 | return scnprintf(bf, size, "%s", err); | |
380 | } | |
381 | ||
382 | static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size) | |
383 | { | |
384 | int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size); | |
385 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
386 | } | |
387 | ||
6eef3d9c ACM |
388 | static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size) |
389 | { | |
390 | int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config); | |
391 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
392 | } | |
393 | ||
7289f83c | 394 | const char *perf_evsel__name(struct perf_evsel *evsel) |
a4460836 | 395 | { |
7289f83c | 396 | char bf[128]; |
a4460836 | 397 | |
7289f83c ACM |
398 | if (evsel->name) |
399 | return evsel->name; | |
c410431c ACM |
400 | |
401 | switch (evsel->attr.type) { | |
402 | case PERF_TYPE_RAW: | |
6eef3d9c | 403 | perf_evsel__raw_name(evsel, bf, sizeof(bf)); |
c410431c ACM |
404 | break; |
405 | ||
406 | case PERF_TYPE_HARDWARE: | |
7289f83c | 407 | perf_evsel__hw_name(evsel, bf, sizeof(bf)); |
c410431c | 408 | break; |
0b668bc9 ACM |
409 | |
410 | case PERF_TYPE_HW_CACHE: | |
7289f83c | 411 | perf_evsel__hw_cache_name(evsel, bf, sizeof(bf)); |
0b668bc9 ACM |
412 | break; |
413 | ||
335c2f5d | 414 | case PERF_TYPE_SOFTWARE: |
7289f83c | 415 | perf_evsel__sw_name(evsel, bf, sizeof(bf)); |
335c2f5d ACM |
416 | break; |
417 | ||
a4460836 | 418 | case PERF_TYPE_TRACEPOINT: |
7289f83c | 419 | scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); |
a4460836 ACM |
420 | break; |
421 | ||
287e74aa JO |
422 | case PERF_TYPE_BREAKPOINT: |
423 | perf_evsel__bp_name(evsel, bf, sizeof(bf)); | |
424 | break; | |
425 | ||
c410431c | 426 | default: |
ca1b1457 RR |
427 | scnprintf(bf, sizeof(bf), "unknown attr type: %d", |
428 | evsel->attr.type); | |
a4460836 | 429 | break; |
c410431c ACM |
430 | } |
431 | ||
7289f83c ACM |
432 | evsel->name = strdup(bf); |
433 | ||
434 | return evsel->name ?: "unknown"; | |
c410431c ACM |
435 | } |
436 | ||
717e263f NK |
437 | const char *perf_evsel__group_name(struct perf_evsel *evsel) |
438 | { | |
439 | return evsel->group_name ?: "anon group"; | |
440 | } | |
441 | ||
442 | int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size) | |
443 | { | |
444 | int ret; | |
445 | struct perf_evsel *pos; | |
446 | const char *group_name = perf_evsel__group_name(evsel); | |
447 | ||
448 | ret = scnprintf(buf, size, "%s", group_name); | |
449 | ||
450 | ret += scnprintf(buf + ret, size - ret, " { %s", | |
451 | perf_evsel__name(evsel)); | |
452 | ||
453 | for_each_group_member(pos, evsel) | |
454 | ret += scnprintf(buf + ret, size - ret, ", %s", | |
455 | perf_evsel__name(pos)); | |
456 | ||
457 | ret += scnprintf(buf + ret, size - ret, " }"); | |
458 | ||
459 | return ret; | |
460 | } | |
461 | ||
774cb499 JO |
462 | /* |
463 | * The enable_on_exec/disabled value strategy: | |
464 | * | |
465 | * 1) For any type of traced program: | |
466 | * - all independent events and group leaders are disabled | |
467 | * - all group members are enabled | |
468 | * | |
469 | * Group members are ruled by group leaders. They need to | |
470 | * be enabled, because the group scheduling relies on that. | |
471 | * | |
472 | * 2) For traced programs executed by perf: | |
473 | * - all independent events and group leaders have | |
474 | * enable_on_exec set | |
475 | * - we don't specifically enable or disable any event during | |
476 | * the record command | |
477 | * | |
478 | * Independent events and group leaders are initially disabled | |
479 | * and get enabled by exec. Group members are ruled by group | |
480 | * leaders as stated in 1). | |
481 | * | |
482 | * 3) For traced programs attached by perf (pid/tid): | |
483 | * - we specifically enable or disable all events during | |
484 | * the record command | |
485 | * | |
486 | * When attaching events to already running traced we | |
487 | * enable/disable events specifically, as there's no | |
488 | * initial traced exec call. | |
489 | */ | |
cac21425 JO |
490 | void perf_evsel__config(struct perf_evsel *evsel, |
491 | struct perf_record_opts *opts) | |
0f82ebc4 | 492 | { |
3c176311 | 493 | struct perf_evsel *leader = evsel->leader; |
0f82ebc4 ACM |
494 | struct perf_event_attr *attr = &evsel->attr; |
495 | int track = !evsel->idx; /* only the first counter needs these */ | |
496 | ||
594ac61a | 497 | attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; |
0f82ebc4 | 498 | attr->inherit = !opts->no_inherit; |
0f82ebc4 | 499 | |
7be5ebe8 ACM |
500 | perf_evsel__set_sample_bit(evsel, IP); |
501 | perf_evsel__set_sample_bit(evsel, TID); | |
0f82ebc4 | 502 | |
3c176311 JO |
503 | if (evsel->sample_read) { |
504 | perf_evsel__set_sample_bit(evsel, READ); | |
505 | ||
506 | /* | |
507 | * We need ID even in case of single event, because | |
508 | * PERF_SAMPLE_READ process ID specific data. | |
509 | */ | |
510 | perf_evsel__set_sample_id(evsel); | |
511 | ||
512 | /* | |
513 | * Apply group format only if we belong to group | |
514 | * with more than one members. | |
515 | */ | |
516 | if (leader->nr_members > 1) { | |
517 | attr->read_format |= PERF_FORMAT_GROUP; | |
518 | attr->inherit = 0; | |
519 | } | |
520 | } | |
521 | ||
0f82ebc4 ACM |
522 | /* |
523 | * We default some events to a 1 default interval. But keep | |
524 | * it a weak assumption overridable by the user. | |
525 | */ | |
526 | if (!attr->sample_period || (opts->user_freq != UINT_MAX && | |
527 | opts->user_interval != ULLONG_MAX)) { | |
528 | if (opts->freq) { | |
7be5ebe8 | 529 | perf_evsel__set_sample_bit(evsel, PERIOD); |
0f82ebc4 ACM |
530 | attr->freq = 1; |
531 | attr->sample_freq = opts->freq; | |
532 | } else { | |
533 | attr->sample_period = opts->default_interval; | |
534 | } | |
535 | } | |
536 | ||
3c176311 JO |
537 | /* |
538 | * Disable sampling for all group members other | |
539 | * than leader in case leader 'leads' the sampling. | |
540 | */ | |
541 | if ((leader != evsel) && leader->sample_read) { | |
542 | attr->sample_freq = 0; | |
543 | attr->sample_period = 0; | |
544 | } | |
545 | ||
0f82ebc4 ACM |
546 | if (opts->no_samples) |
547 | attr->sample_freq = 0; | |
548 | ||
549 | if (opts->inherit_stat) | |
550 | attr->inherit_stat = 1; | |
551 | ||
552 | if (opts->sample_address) { | |
7be5ebe8 | 553 | perf_evsel__set_sample_bit(evsel, ADDR); |
0f82ebc4 ACM |
554 | attr->mmap_data = track; |
555 | } | |
556 | ||
26d33022 | 557 | if (opts->call_graph) { |
7be5ebe8 | 558 | perf_evsel__set_sample_bit(evsel, CALLCHAIN); |
0f82ebc4 | 559 | |
26d33022 | 560 | if (opts->call_graph == CALLCHAIN_DWARF) { |
7be5ebe8 ACM |
561 | perf_evsel__set_sample_bit(evsel, REGS_USER); |
562 | perf_evsel__set_sample_bit(evsel, STACK_USER); | |
26d33022 JO |
563 | attr->sample_regs_user = PERF_REGS_MASK; |
564 | attr->sample_stack_user = opts->stack_dump_size; | |
565 | attr->exclude_callchain_user = 1; | |
566 | } | |
567 | } | |
568 | ||
e40ee742 | 569 | if (perf_target__has_cpu(&opts->target)) |
7be5ebe8 | 570 | perf_evsel__set_sample_bit(evsel, CPU); |
0f82ebc4 | 571 | |
3e76ac78 | 572 | if (opts->period) |
7be5ebe8 | 573 | perf_evsel__set_sample_bit(evsel, PERIOD); |
3e76ac78 | 574 | |
594ac61a | 575 | if (!perf_missing_features.sample_id_all && |
d67356e7 | 576 | (opts->sample_time || !opts->no_inherit || |
aa22dd49 | 577 | perf_target__has_cpu(&opts->target))) |
7be5ebe8 | 578 | perf_evsel__set_sample_bit(evsel, TIME); |
0f82ebc4 ACM |
579 | |
580 | if (opts->raw_samples) { | |
7be5ebe8 ACM |
581 | perf_evsel__set_sample_bit(evsel, TIME); |
582 | perf_evsel__set_sample_bit(evsel, RAW); | |
583 | perf_evsel__set_sample_bit(evsel, CPU); | |
0f82ebc4 ACM |
584 | } |
585 | ||
ccf49bfc SE |
586 | if (opts->sample_address) |
587 | attr->sample_type |= PERF_SAMPLE_DATA_SRC; | |
588 | ||
0f82ebc4 ACM |
589 | if (opts->no_delay) { |
590 | attr->watermark = 0; | |
591 | attr->wakeup_events = 1; | |
592 | } | |
bdfebd84 | 593 | if (opts->branch_stack) { |
7be5ebe8 | 594 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); |
bdfebd84 RAV |
595 | attr->branch_sample_type = opts->branch_stack; |
596 | } | |
0f82ebc4 | 597 | |
05484298 AK |
598 | if (opts->sample_weight) |
599 | attr->sample_type |= PERF_SAMPLE_WEIGHT; | |
600 | ||
0f82ebc4 ACM |
601 | attr->mmap = track; |
602 | attr->comm = track; | |
603 | ||
774cb499 JO |
604 | /* |
605 | * XXX see the function comment above | |
606 | * | |
607 | * Disabling only independent events or group leaders, | |
608 | * keeping group members enabled. | |
609 | */ | |
823254ed | 610 | if (perf_evsel__is_group_leader(evsel)) |
774cb499 JO |
611 | attr->disabled = 1; |
612 | ||
613 | /* | |
614 | * Setting enable_on_exec for independent events and | |
615 | * group leaders for traced executed by perf. | |
616 | */ | |
823254ed | 617 | if (perf_target__none(&opts->target) && perf_evsel__is_group_leader(evsel)) |
0f82ebc4 | 618 | attr->enable_on_exec = 1; |
0f82ebc4 ACM |
619 | } |
620 | ||
69aad6f1 ACM |
621 | int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
622 | { | |
4af4c955 | 623 | int cpu, thread; |
69aad6f1 | 624 | evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int)); |
4af4c955 DA |
625 | |
626 | if (evsel->fd) { | |
627 | for (cpu = 0; cpu < ncpus; cpu++) { | |
628 | for (thread = 0; thread < nthreads; thread++) { | |
629 | FD(evsel, cpu, thread) = -1; | |
630 | } | |
631 | } | |
632 | } | |
633 | ||
69aad6f1 ACM |
634 | return evsel->fd != NULL ? 0 : -ENOMEM; |
635 | } | |
636 | ||
745cefc5 ACM |
637 | int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads, |
638 | const char *filter) | |
639 | { | |
640 | int cpu, thread; | |
641 | ||
642 | for (cpu = 0; cpu < ncpus; cpu++) { | |
643 | for (thread = 0; thread < nthreads; thread++) { | |
644 | int fd = FD(evsel, cpu, thread), | |
645 | err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter); | |
646 | ||
647 | if (err) | |
648 | return err; | |
649 | } | |
650 | } | |
651 | ||
652 | return 0; | |
653 | } | |
654 | ||
70db7533 ACM |
655 | int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |
656 | { | |
a91e5431 ACM |
657 | evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id)); |
658 | if (evsel->sample_id == NULL) | |
659 | return -ENOMEM; | |
660 | ||
661 | evsel->id = zalloc(ncpus * nthreads * sizeof(u64)); | |
662 | if (evsel->id == NULL) { | |
663 | xyarray__delete(evsel->sample_id); | |
664 | evsel->sample_id = NULL; | |
665 | return -ENOMEM; | |
666 | } | |
667 | ||
668 | return 0; | |
70db7533 ACM |
669 | } |
670 | ||
a7e191c3 FD |
671 | void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus) |
672 | { | |
673 | memset(evsel->counts, 0, (sizeof(*evsel->counts) + | |
674 | (ncpus * sizeof(struct perf_counts_values)))); | |
675 | } | |
676 | ||
c52b12ed ACM |
677 | int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus) |
678 | { | |
679 | evsel->counts = zalloc((sizeof(*evsel->counts) + | |
680 | (ncpus * sizeof(struct perf_counts_values)))); | |
681 | return evsel->counts != NULL ? 0 : -ENOMEM; | |
682 | } | |
683 | ||
69aad6f1 ACM |
684 | void perf_evsel__free_fd(struct perf_evsel *evsel) |
685 | { | |
686 | xyarray__delete(evsel->fd); | |
687 | evsel->fd = NULL; | |
688 | } | |
689 | ||
70db7533 ACM |
690 | void perf_evsel__free_id(struct perf_evsel *evsel) |
691 | { | |
a91e5431 ACM |
692 | xyarray__delete(evsel->sample_id); |
693 | evsel->sample_id = NULL; | |
694 | free(evsel->id); | |
70db7533 ACM |
695 | evsel->id = NULL; |
696 | } | |
697 | ||
c52b12ed ACM |
698 | void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
699 | { | |
700 | int cpu, thread; | |
701 | ||
702 | for (cpu = 0; cpu < ncpus; cpu++) | |
703 | for (thread = 0; thread < nthreads; ++thread) { | |
704 | close(FD(evsel, cpu, thread)); | |
705 | FD(evsel, cpu, thread) = -1; | |
706 | } | |
707 | } | |
708 | ||
43f8e76e NK |
709 | void perf_evsel__free_counts(struct perf_evsel *evsel) |
710 | { | |
711 | free(evsel->counts); | |
712 | } | |
713 | ||
ef1d1af2 | 714 | void perf_evsel__exit(struct perf_evsel *evsel) |
69aad6f1 ACM |
715 | { |
716 | assert(list_empty(&evsel->node)); | |
736b05a0 NK |
717 | perf_evsel__free_fd(evsel); |
718 | perf_evsel__free_id(evsel); | |
ef1d1af2 ACM |
719 | } |
720 | ||
721 | void perf_evsel__delete(struct perf_evsel *evsel) | |
722 | { | |
723 | perf_evsel__exit(evsel); | |
023695d9 | 724 | close_cgroup(evsel->cgrp); |
6a4bb04c | 725 | free(evsel->group_name); |
e48ffe2b | 726 | if (evsel->tp_format) |
efd2b924 | 727 | pevent_free_format(evsel->tp_format); |
f0c55bcf | 728 | free(evsel->name); |
69aad6f1 ACM |
729 | free(evsel); |
730 | } | |
c52b12ed | 731 | |
c7a79c47 SE |
732 | static inline void compute_deltas(struct perf_evsel *evsel, |
733 | int cpu, | |
734 | struct perf_counts_values *count) | |
735 | { | |
736 | struct perf_counts_values tmp; | |
737 | ||
738 | if (!evsel->prev_raw_counts) | |
739 | return; | |
740 | ||
741 | if (cpu == -1) { | |
742 | tmp = evsel->prev_raw_counts->aggr; | |
743 | evsel->prev_raw_counts->aggr = *count; | |
744 | } else { | |
745 | tmp = evsel->prev_raw_counts->cpu[cpu]; | |
746 | evsel->prev_raw_counts->cpu[cpu] = *count; | |
747 | } | |
748 | ||
749 | count->val = count->val - tmp.val; | |
750 | count->ena = count->ena - tmp.ena; | |
751 | count->run = count->run - tmp.run; | |
752 | } | |
753 | ||
c52b12ed ACM |
754 | int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, |
755 | int cpu, int thread, bool scale) | |
756 | { | |
757 | struct perf_counts_values count; | |
758 | size_t nv = scale ? 3 : 1; | |
759 | ||
760 | if (FD(evsel, cpu, thread) < 0) | |
761 | return -EINVAL; | |
762 | ||
4eed11d5 ACM |
763 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0) |
764 | return -ENOMEM; | |
765 | ||
c52b12ed ACM |
766 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) |
767 | return -errno; | |
768 | ||
c7a79c47 SE |
769 | compute_deltas(evsel, cpu, &count); |
770 | ||
c52b12ed ACM |
771 | if (scale) { |
772 | if (count.run == 0) | |
773 | count.val = 0; | |
774 | else if (count.run < count.ena) | |
775 | count.val = (u64)((double)count.val * count.ena / count.run + 0.5); | |
776 | } else | |
777 | count.ena = count.run = 0; | |
778 | ||
779 | evsel->counts->cpu[cpu] = count; | |
780 | return 0; | |
781 | } | |
782 | ||
783 | int __perf_evsel__read(struct perf_evsel *evsel, | |
784 | int ncpus, int nthreads, bool scale) | |
785 | { | |
786 | size_t nv = scale ? 3 : 1; | |
787 | int cpu, thread; | |
788 | struct perf_counts_values *aggr = &evsel->counts->aggr, count; | |
789 | ||
52bcd994 | 790 | aggr->val = aggr->ena = aggr->run = 0; |
c52b12ed ACM |
791 | |
792 | for (cpu = 0; cpu < ncpus; cpu++) { | |
793 | for (thread = 0; thread < nthreads; thread++) { | |
794 | if (FD(evsel, cpu, thread) < 0) | |
795 | continue; | |
796 | ||
797 | if (readn(FD(evsel, cpu, thread), | |
798 | &count, nv * sizeof(u64)) < 0) | |
799 | return -errno; | |
800 | ||
801 | aggr->val += count.val; | |
802 | if (scale) { | |
803 | aggr->ena += count.ena; | |
804 | aggr->run += count.run; | |
805 | } | |
806 | } | |
807 | } | |
808 | ||
c7a79c47 SE |
809 | compute_deltas(evsel, -1, aggr); |
810 | ||
c52b12ed ACM |
811 | evsel->counts->scaled = 0; |
812 | if (scale) { | |
813 | if (aggr->run == 0) { | |
814 | evsel->counts->scaled = -1; | |
815 | aggr->val = 0; | |
816 | return 0; | |
817 | } | |
818 | ||
819 | if (aggr->run < aggr->ena) { | |
820 | evsel->counts->scaled = 1; | |
821 | aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5); | |
822 | } | |
823 | } else | |
824 | aggr->ena = aggr->run = 0; | |
825 | ||
826 | return 0; | |
827 | } | |
48290609 | 828 | |
6a4bb04c JO |
829 | static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread) |
830 | { | |
831 | struct perf_evsel *leader = evsel->leader; | |
832 | int fd; | |
833 | ||
823254ed | 834 | if (perf_evsel__is_group_leader(evsel)) |
6a4bb04c JO |
835 | return -1; |
836 | ||
837 | /* | |
838 | * Leader must be already processed/open, | |
839 | * if not it's a bug. | |
840 | */ | |
841 | BUG_ON(!leader->fd); | |
842 | ||
843 | fd = FD(leader, cpu, thread); | |
844 | BUG_ON(fd == -1); | |
845 | ||
846 | return fd; | |
847 | } | |
848 | ||
0252208e | 849 | static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 850 | struct thread_map *threads) |
48290609 | 851 | { |
0252208e | 852 | int cpu, thread; |
023695d9 | 853 | unsigned long flags = 0; |
727ab04e | 854 | int pid = -1, err; |
48290609 | 855 | |
0252208e ACM |
856 | if (evsel->fd == NULL && |
857 | perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0) | |
727ab04e | 858 | return -ENOMEM; |
4eed11d5 | 859 | |
023695d9 SE |
860 | if (evsel->cgrp) { |
861 | flags = PERF_FLAG_PID_CGROUP; | |
862 | pid = evsel->cgrp->fd; | |
863 | } | |
864 | ||
594ac61a ACM |
865 | fallback_missing_features: |
866 | if (perf_missing_features.exclude_guest) | |
867 | evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; | |
868 | retry_sample_id: | |
869 | if (perf_missing_features.sample_id_all) | |
870 | evsel->attr.sample_id_all = 0; | |
871 | ||
86bd5e86 | 872 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
9d04f178 | 873 | |
0252208e | 874 | for (thread = 0; thread < threads->nr; thread++) { |
6a4bb04c | 875 | int group_fd; |
023695d9 SE |
876 | |
877 | if (!evsel->cgrp) | |
878 | pid = threads->map[thread]; | |
879 | ||
6a4bb04c JO |
880 | group_fd = get_group_fd(evsel, cpu, thread); |
881 | ||
0252208e | 882 | FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr, |
023695d9 | 883 | pid, |
f08199d3 | 884 | cpus->map[cpu], |
023695d9 | 885 | group_fd, flags); |
727ab04e ACM |
886 | if (FD(evsel, cpu, thread) < 0) { |
887 | err = -errno; | |
594ac61a | 888 | goto try_fallback; |
727ab04e | 889 | } |
0252208e | 890 | } |
48290609 ACM |
891 | } |
892 | ||
893 | return 0; | |
894 | ||
594ac61a ACM |
895 | try_fallback: |
896 | if (err != -EINVAL || cpu > 0 || thread > 0) | |
897 | goto out_close; | |
898 | ||
899 | if (!perf_missing_features.exclude_guest && | |
900 | (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { | |
901 | perf_missing_features.exclude_guest = true; | |
902 | goto fallback_missing_features; | |
903 | } else if (!perf_missing_features.sample_id_all) { | |
904 | perf_missing_features.sample_id_all = true; | |
905 | goto retry_sample_id; | |
906 | } | |
907 | ||
48290609 | 908 | out_close: |
0252208e ACM |
909 | do { |
910 | while (--thread >= 0) { | |
911 | close(FD(evsel, cpu, thread)); | |
912 | FD(evsel, cpu, thread) = -1; | |
913 | } | |
914 | thread = threads->nr; | |
915 | } while (--cpu >= 0); | |
727ab04e ACM |
916 | return err; |
917 | } | |
918 | ||
919 | void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads) | |
920 | { | |
921 | if (evsel->fd == NULL) | |
922 | return; | |
923 | ||
924 | perf_evsel__close_fd(evsel, ncpus, nthreads); | |
925 | perf_evsel__free_fd(evsel); | |
926 | evsel->fd = NULL; | |
48290609 ACM |
927 | } |
928 | ||
0252208e ACM |
929 | static struct { |
930 | struct cpu_map map; | |
931 | int cpus[1]; | |
932 | } empty_cpu_map = { | |
933 | .map.nr = 1, | |
934 | .cpus = { -1, }, | |
935 | }; | |
936 | ||
937 | static struct { | |
938 | struct thread_map map; | |
939 | int threads[1]; | |
940 | } empty_thread_map = { | |
941 | .map.nr = 1, | |
942 | .threads = { -1, }, | |
943 | }; | |
944 | ||
f08199d3 | 945 | int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 946 | struct thread_map *threads) |
48290609 | 947 | { |
0252208e ACM |
948 | if (cpus == NULL) { |
949 | /* Work around old compiler warnings about strict aliasing */ | |
950 | cpus = &empty_cpu_map.map; | |
48290609 ACM |
951 | } |
952 | ||
0252208e ACM |
953 | if (threads == NULL) |
954 | threads = &empty_thread_map.map; | |
48290609 | 955 | |
6a4bb04c | 956 | return __perf_evsel__open(evsel, cpus, threads); |
48290609 ACM |
957 | } |
958 | ||
f08199d3 | 959 | int perf_evsel__open_per_cpu(struct perf_evsel *evsel, |
6a4bb04c | 960 | struct cpu_map *cpus) |
48290609 | 961 | { |
6a4bb04c | 962 | return __perf_evsel__open(evsel, cpus, &empty_thread_map.map); |
0252208e | 963 | } |
48290609 | 964 | |
f08199d3 | 965 | int perf_evsel__open_per_thread(struct perf_evsel *evsel, |
6a4bb04c | 966 | struct thread_map *threads) |
0252208e | 967 | { |
6a4bb04c | 968 | return __perf_evsel__open(evsel, &empty_cpu_map.map, threads); |
48290609 | 969 | } |
70082dd9 | 970 | |
0807d2d8 ACM |
971 | static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel, |
972 | const union perf_event *event, | |
973 | struct perf_sample *sample) | |
d0dd74e8 | 974 | { |
0807d2d8 | 975 | u64 type = evsel->attr.sample_type; |
d0dd74e8 | 976 | const u64 *array = event->sample.array; |
0807d2d8 | 977 | bool swapped = evsel->needs_swap; |
37073f9e | 978 | union u64_swap u; |
d0dd74e8 ACM |
979 | |
980 | array += ((event->header.size - | |
981 | sizeof(event->header)) / sizeof(u64)) - 1; | |
982 | ||
983 | if (type & PERF_SAMPLE_CPU) { | |
37073f9e JO |
984 | u.val64 = *array; |
985 | if (swapped) { | |
986 | /* undo swap of u64, then swap on individual u32s */ | |
987 | u.val64 = bswap_64(u.val64); | |
988 | u.val32[0] = bswap_32(u.val32[0]); | |
989 | } | |
990 | ||
991 | sample->cpu = u.val32[0]; | |
d0dd74e8 ACM |
992 | array--; |
993 | } | |
994 | ||
995 | if (type & PERF_SAMPLE_STREAM_ID) { | |
996 | sample->stream_id = *array; | |
997 | array--; | |
998 | } | |
999 | ||
1000 | if (type & PERF_SAMPLE_ID) { | |
1001 | sample->id = *array; | |
1002 | array--; | |
1003 | } | |
1004 | ||
1005 | if (type & PERF_SAMPLE_TIME) { | |
1006 | sample->time = *array; | |
1007 | array--; | |
1008 | } | |
1009 | ||
1010 | if (type & PERF_SAMPLE_TID) { | |
37073f9e JO |
1011 | u.val64 = *array; |
1012 | if (swapped) { | |
1013 | /* undo swap of u64, then swap on individual u32s */ | |
1014 | u.val64 = bswap_64(u.val64); | |
1015 | u.val32[0] = bswap_32(u.val32[0]); | |
1016 | u.val32[1] = bswap_32(u.val32[1]); | |
1017 | } | |
1018 | ||
1019 | sample->pid = u.val32[0]; | |
1020 | sample->tid = u.val32[1]; | |
d0dd74e8 ACM |
1021 | } |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
98e1da90 FW |
1026 | static bool sample_overlap(const union perf_event *event, |
1027 | const void *offset, u64 size) | |
1028 | { | |
1029 | const void *base = event; | |
1030 | ||
1031 | if (offset + size > base + event->header.size) | |
1032 | return true; | |
1033 | ||
1034 | return false; | |
1035 | } | |
1036 | ||
a3f698fe | 1037 | int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, |
0807d2d8 | 1038 | struct perf_sample *data) |
d0dd74e8 | 1039 | { |
a3f698fe | 1040 | u64 type = evsel->attr.sample_type; |
0f6a3015 | 1041 | u64 regs_user = evsel->attr.sample_regs_user; |
0807d2d8 | 1042 | bool swapped = evsel->needs_swap; |
d0dd74e8 ACM |
1043 | const u64 *array; |
1044 | ||
936be503 DA |
1045 | /* |
1046 | * used for cross-endian analysis. See git commit 65014ab3 | |
1047 | * for why this goofiness is needed. | |
1048 | */ | |
6a11f92e | 1049 | union u64_swap u; |
936be503 | 1050 | |
f3bda2c9 | 1051 | memset(data, 0, sizeof(*data)); |
d0dd74e8 ACM |
1052 | data->cpu = data->pid = data->tid = -1; |
1053 | data->stream_id = data->id = data->time = -1ULL; | |
a4a03fc7 | 1054 | data->period = 1; |
05484298 | 1055 | data->weight = 0; |
d0dd74e8 ACM |
1056 | |
1057 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
a3f698fe | 1058 | if (!evsel->attr.sample_id_all) |
d0dd74e8 | 1059 | return 0; |
0807d2d8 | 1060 | return perf_evsel__parse_id_sample(evsel, event, data); |
d0dd74e8 ACM |
1061 | } |
1062 | ||
1063 | array = event->sample.array; | |
1064 | ||
a3f698fe | 1065 | if (evsel->sample_size + sizeof(event->header) > event->header.size) |
a2854124 FW |
1066 | return -EFAULT; |
1067 | ||
d0dd74e8 ACM |
1068 | if (type & PERF_SAMPLE_IP) { |
1069 | data->ip = event->ip.ip; | |
1070 | array++; | |
1071 | } | |
1072 | ||
1073 | if (type & PERF_SAMPLE_TID) { | |
936be503 DA |
1074 | u.val64 = *array; |
1075 | if (swapped) { | |
1076 | /* undo swap of u64, then swap on individual u32s */ | |
1077 | u.val64 = bswap_64(u.val64); | |
1078 | u.val32[0] = bswap_32(u.val32[0]); | |
1079 | u.val32[1] = bswap_32(u.val32[1]); | |
1080 | } | |
1081 | ||
1082 | data->pid = u.val32[0]; | |
1083 | data->tid = u.val32[1]; | |
d0dd74e8 ACM |
1084 | array++; |
1085 | } | |
1086 | ||
1087 | if (type & PERF_SAMPLE_TIME) { | |
1088 | data->time = *array; | |
1089 | array++; | |
1090 | } | |
1091 | ||
7cec0922 | 1092 | data->addr = 0; |
d0dd74e8 ACM |
1093 | if (type & PERF_SAMPLE_ADDR) { |
1094 | data->addr = *array; | |
1095 | array++; | |
1096 | } | |
1097 | ||
1098 | data->id = -1ULL; | |
1099 | if (type & PERF_SAMPLE_ID) { | |
1100 | data->id = *array; | |
1101 | array++; | |
1102 | } | |
1103 | ||
1104 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1105 | data->stream_id = *array; | |
1106 | array++; | |
1107 | } | |
1108 | ||
1109 | if (type & PERF_SAMPLE_CPU) { | |
936be503 DA |
1110 | |
1111 | u.val64 = *array; | |
1112 | if (swapped) { | |
1113 | /* undo swap of u64, then swap on individual u32s */ | |
1114 | u.val64 = bswap_64(u.val64); | |
1115 | u.val32[0] = bswap_32(u.val32[0]); | |
1116 | } | |
1117 | ||
1118 | data->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1119 | array++; |
1120 | } | |
1121 | ||
1122 | if (type & PERF_SAMPLE_PERIOD) { | |
1123 | data->period = *array; | |
1124 | array++; | |
1125 | } | |
1126 | ||
1127 | if (type & PERF_SAMPLE_READ) { | |
9ede473c JO |
1128 | u64 read_format = evsel->attr.read_format; |
1129 | ||
1130 | if (read_format & PERF_FORMAT_GROUP) | |
1131 | data->read.group.nr = *array; | |
1132 | else | |
1133 | data->read.one.value = *array; | |
1134 | ||
1135 | array++; | |
1136 | ||
1137 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
1138 | data->read.time_enabled = *array; | |
1139 | array++; | |
1140 | } | |
1141 | ||
1142 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
1143 | data->read.time_running = *array; | |
1144 | array++; | |
1145 | } | |
1146 | ||
1147 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1148 | if (read_format & PERF_FORMAT_GROUP) { | |
1149 | data->read.group.values = (struct sample_read_value *) array; | |
1150 | array = (void *) array + data->read.group.nr * | |
1151 | sizeof(struct sample_read_value); | |
1152 | } else { | |
1153 | data->read.one.id = *array; | |
1154 | array++; | |
1155 | } | |
d0dd74e8 ACM |
1156 | } |
1157 | ||
1158 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
98e1da90 FW |
1159 | if (sample_overlap(event, array, sizeof(data->callchain->nr))) |
1160 | return -EFAULT; | |
1161 | ||
d0dd74e8 | 1162 | data->callchain = (struct ip_callchain *)array; |
98e1da90 FW |
1163 | |
1164 | if (sample_overlap(event, array, data->callchain->nr)) | |
1165 | return -EFAULT; | |
1166 | ||
d0dd74e8 ACM |
1167 | array += 1 + data->callchain->nr; |
1168 | } | |
1169 | ||
1170 | if (type & PERF_SAMPLE_RAW) { | |
8e303f20 JO |
1171 | const u64 *pdata; |
1172 | ||
936be503 DA |
1173 | u.val64 = *array; |
1174 | if (WARN_ONCE(swapped, | |
1175 | "Endianness of raw data not corrected!\n")) { | |
1176 | /* undo swap of u64, then swap on individual u32s */ | |
1177 | u.val64 = bswap_64(u.val64); | |
1178 | u.val32[0] = bswap_32(u.val32[0]); | |
1179 | u.val32[1] = bswap_32(u.val32[1]); | |
1180 | } | |
98e1da90 FW |
1181 | |
1182 | if (sample_overlap(event, array, sizeof(u32))) | |
1183 | return -EFAULT; | |
1184 | ||
936be503 | 1185 | data->raw_size = u.val32[0]; |
8e303f20 | 1186 | pdata = (void *) array + sizeof(u32); |
98e1da90 | 1187 | |
8e303f20 | 1188 | if (sample_overlap(event, pdata, data->raw_size)) |
98e1da90 FW |
1189 | return -EFAULT; |
1190 | ||
8e303f20 | 1191 | data->raw_data = (void *) pdata; |
fa30c964 SE |
1192 | |
1193 | array = (void *)array + data->raw_size + sizeof(u32); | |
d0dd74e8 ACM |
1194 | } |
1195 | ||
b5387528 RAV |
1196 | if (type & PERF_SAMPLE_BRANCH_STACK) { |
1197 | u64 sz; | |
1198 | ||
1199 | data->branch_stack = (struct branch_stack *)array; | |
1200 | array++; /* nr */ | |
1201 | ||
1202 | sz = data->branch_stack->nr * sizeof(struct branch_entry); | |
1203 | sz /= sizeof(u64); | |
1204 | array += sz; | |
1205 | } | |
0f6a3015 JO |
1206 | |
1207 | if (type & PERF_SAMPLE_REGS_USER) { | |
1208 | /* First u64 tells us if we have any regs in sample. */ | |
1209 | u64 avail = *array++; | |
1210 | ||
1211 | if (avail) { | |
1212 | data->user_regs.regs = (u64 *)array; | |
1213 | array += hweight_long(regs_user); | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | if (type & PERF_SAMPLE_STACK_USER) { | |
1218 | u64 size = *array++; | |
1219 | ||
1220 | data->user_stack.offset = ((char *)(array - 1) | |
1221 | - (char *) event); | |
1222 | ||
1223 | if (!size) { | |
1224 | data->user_stack.size = 0; | |
1225 | } else { | |
1226 | data->user_stack.data = (char *)array; | |
1227 | array += size / sizeof(*array); | |
54bd2692 | 1228 | data->user_stack.size = *array++; |
0f6a3015 JO |
1229 | } |
1230 | } | |
1231 | ||
05484298 AK |
1232 | data->weight = 0; |
1233 | if (type & PERF_SAMPLE_WEIGHT) { | |
1234 | data->weight = *array; | |
1235 | array++; | |
1236 | } | |
1237 | ||
98a3b32c SE |
1238 | data->data_src = PERF_MEM_DATA_SRC_NONE; |
1239 | if (type & PERF_SAMPLE_DATA_SRC) { | |
1240 | data->data_src = *array; | |
1241 | array++; | |
1242 | } | |
1243 | ||
d0dd74e8 ACM |
1244 | return 0; |
1245 | } | |
74eec26f AV |
1246 | |
1247 | int perf_event__synthesize_sample(union perf_event *event, u64 type, | |
1248 | const struct perf_sample *sample, | |
1249 | bool swapped) | |
1250 | { | |
1251 | u64 *array; | |
1252 | ||
1253 | /* | |
1254 | * used for cross-endian analysis. See git commit 65014ab3 | |
1255 | * for why this goofiness is needed. | |
1256 | */ | |
6a11f92e | 1257 | union u64_swap u; |
74eec26f AV |
1258 | |
1259 | array = event->sample.array; | |
1260 | ||
1261 | if (type & PERF_SAMPLE_IP) { | |
1262 | event->ip.ip = sample->ip; | |
1263 | array++; | |
1264 | } | |
1265 | ||
1266 | if (type & PERF_SAMPLE_TID) { | |
1267 | u.val32[0] = sample->pid; | |
1268 | u.val32[1] = sample->tid; | |
1269 | if (swapped) { | |
1270 | /* | |
a3f698fe | 1271 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
1272 | */ |
1273 | u.val32[0] = bswap_32(u.val32[0]); | |
1274 | u.val32[1] = bswap_32(u.val32[1]); | |
1275 | u.val64 = bswap_64(u.val64); | |
1276 | } | |
1277 | ||
1278 | *array = u.val64; | |
1279 | array++; | |
1280 | } | |
1281 | ||
1282 | if (type & PERF_SAMPLE_TIME) { | |
1283 | *array = sample->time; | |
1284 | array++; | |
1285 | } | |
1286 | ||
1287 | if (type & PERF_SAMPLE_ADDR) { | |
1288 | *array = sample->addr; | |
1289 | array++; | |
1290 | } | |
1291 | ||
1292 | if (type & PERF_SAMPLE_ID) { | |
1293 | *array = sample->id; | |
1294 | array++; | |
1295 | } | |
1296 | ||
1297 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1298 | *array = sample->stream_id; | |
1299 | array++; | |
1300 | } | |
1301 | ||
1302 | if (type & PERF_SAMPLE_CPU) { | |
1303 | u.val32[0] = sample->cpu; | |
1304 | if (swapped) { | |
1305 | /* | |
a3f698fe | 1306 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
1307 | */ |
1308 | u.val32[0] = bswap_32(u.val32[0]); | |
1309 | u.val64 = bswap_64(u.val64); | |
1310 | } | |
1311 | *array = u.val64; | |
1312 | array++; | |
1313 | } | |
1314 | ||
1315 | if (type & PERF_SAMPLE_PERIOD) { | |
1316 | *array = sample->period; | |
1317 | array++; | |
1318 | } | |
1319 | ||
1320 | return 0; | |
1321 | } | |
5555ded4 | 1322 | |
efd2b924 ACM |
1323 | struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name) |
1324 | { | |
1325 | return pevent_find_field(evsel->tp_format, name); | |
1326 | } | |
1327 | ||
5d2074ea | 1328 | void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample, |
5555ded4 ACM |
1329 | const char *name) |
1330 | { | |
efd2b924 | 1331 | struct format_field *field = perf_evsel__field(evsel, name); |
5555ded4 ACM |
1332 | int offset; |
1333 | ||
efd2b924 ACM |
1334 | if (!field) |
1335 | return NULL; | |
5555ded4 ACM |
1336 | |
1337 | offset = field->offset; | |
1338 | ||
1339 | if (field->flags & FIELD_IS_DYNAMIC) { | |
1340 | offset = *(int *)(sample->raw_data + field->offset); | |
1341 | offset &= 0xffff; | |
1342 | } | |
1343 | ||
1344 | return sample->raw_data + offset; | |
1345 | } | |
1346 | ||
1347 | u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample, | |
1348 | const char *name) | |
1349 | { | |
efd2b924 | 1350 | struct format_field *field = perf_evsel__field(evsel, name); |
e6b6f679 ACM |
1351 | void *ptr; |
1352 | u64 value; | |
5555ded4 | 1353 | |
efd2b924 ACM |
1354 | if (!field) |
1355 | return 0; | |
5555ded4 | 1356 | |
e6b6f679 | 1357 | ptr = sample->raw_data + field->offset; |
5555ded4 | 1358 | |
e6b6f679 ACM |
1359 | switch (field->size) { |
1360 | case 1: | |
1361 | return *(u8 *)ptr; | |
1362 | case 2: | |
1363 | value = *(u16 *)ptr; | |
1364 | break; | |
1365 | case 4: | |
1366 | value = *(u32 *)ptr; | |
1367 | break; | |
1368 | case 8: | |
1369 | value = *(u64 *)ptr; | |
1370 | break; | |
1371 | default: | |
1372 | return 0; | |
1373 | } | |
1374 | ||
1375 | if (!evsel->needs_swap) | |
1376 | return value; | |
1377 | ||
1378 | switch (field->size) { | |
1379 | case 2: | |
1380 | return bswap_16(value); | |
1381 | case 4: | |
1382 | return bswap_32(value); | |
1383 | case 8: | |
1384 | return bswap_64(value); | |
1385 | default: | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | return 0; | |
5555ded4 | 1390 | } |
0698aedd ACM |
1391 | |
1392 | static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...) | |
1393 | { | |
1394 | va_list args; | |
1395 | int ret = 0; | |
1396 | ||
1397 | if (!*first) { | |
1398 | ret += fprintf(fp, ","); | |
1399 | } else { | |
1400 | ret += fprintf(fp, ":"); | |
1401 | *first = false; | |
1402 | } | |
1403 | ||
1404 | va_start(args, fmt); | |
1405 | ret += vfprintf(fp, fmt, args); | |
1406 | va_end(args); | |
1407 | return ret; | |
1408 | } | |
1409 | ||
1410 | static int __if_fprintf(FILE *fp, bool *first, const char *field, u64 value) | |
1411 | { | |
1412 | if (value == 0) | |
1413 | return 0; | |
1414 | ||
1415 | return comma_fprintf(fp, first, " %s: %" PRIu64, field, value); | |
1416 | } | |
1417 | ||
1418 | #define if_print(field) printed += __if_fprintf(fp, &first, #field, evsel->attr.field) | |
1419 | ||
c79a4393 ACM |
1420 | struct bit_names { |
1421 | int bit; | |
1422 | const char *name; | |
1423 | }; | |
1424 | ||
1425 | static int bits__fprintf(FILE *fp, const char *field, u64 value, | |
1426 | struct bit_names *bits, bool *first) | |
1427 | { | |
1428 | int i = 0, printed = comma_fprintf(fp, first, " %s: ", field); | |
1429 | bool first_bit = true; | |
1430 | ||
1431 | do { | |
1432 | if (value & bits[i].bit) { | |
1433 | printed += fprintf(fp, "%s%s", first_bit ? "" : "|", bits[i].name); | |
1434 | first_bit = false; | |
1435 | } | |
1436 | } while (bits[++i].name != NULL); | |
1437 | ||
1438 | return printed; | |
1439 | } | |
1440 | ||
1441 | static int sample_type__fprintf(FILE *fp, bool *first, u64 value) | |
1442 | { | |
1443 | #define bit_name(n) { PERF_SAMPLE_##n, #n } | |
1444 | struct bit_names bits[] = { | |
1445 | bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR), | |
1446 | bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU), | |
1447 | bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW), | |
1448 | bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER), | |
1449 | { .name = NULL, } | |
1450 | }; | |
1451 | #undef bit_name | |
1452 | return bits__fprintf(fp, "sample_type", value, bits, first); | |
1453 | } | |
1454 | ||
1455 | static int read_format__fprintf(FILE *fp, bool *first, u64 value) | |
1456 | { | |
1457 | #define bit_name(n) { PERF_FORMAT_##n, #n } | |
1458 | struct bit_names bits[] = { | |
1459 | bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING), | |
1460 | bit_name(ID), bit_name(GROUP), | |
1461 | { .name = NULL, } | |
1462 | }; | |
1463 | #undef bit_name | |
1464 | return bits__fprintf(fp, "read_format", value, bits, first); | |
1465 | } | |
1466 | ||
0698aedd ACM |
1467 | int perf_evsel__fprintf(struct perf_evsel *evsel, |
1468 | struct perf_attr_details *details, FILE *fp) | |
1469 | { | |
1470 | bool first = true; | |
e6ab07d0 NK |
1471 | int printed = 0; |
1472 | ||
e35ef355 | 1473 | if (details->event_group) { |
e6ab07d0 NK |
1474 | struct perf_evsel *pos; |
1475 | ||
1476 | if (!perf_evsel__is_group_leader(evsel)) | |
1477 | return 0; | |
1478 | ||
1479 | if (evsel->nr_members > 1) | |
1480 | printed += fprintf(fp, "%s{", evsel->group_name ?: ""); | |
1481 | ||
1482 | printed += fprintf(fp, "%s", perf_evsel__name(evsel)); | |
1483 | for_each_group_member(pos, evsel) | |
1484 | printed += fprintf(fp, ",%s", perf_evsel__name(pos)); | |
1485 | ||
1486 | if (evsel->nr_members > 1) | |
1487 | printed += fprintf(fp, "}"); | |
1488 | goto out; | |
1489 | } | |
1490 | ||
1491 | printed += fprintf(fp, "%s", perf_evsel__name(evsel)); | |
0698aedd ACM |
1492 | |
1493 | if (details->verbose || details->freq) { | |
1494 | printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64, | |
1495 | (u64)evsel->attr.sample_freq); | |
1496 | } | |
1497 | ||
1498 | if (details->verbose) { | |
1499 | if_print(type); | |
1500 | if_print(config); | |
1501 | if_print(config1); | |
1502 | if_print(config2); | |
1503 | if_print(size); | |
c79a4393 ACM |
1504 | printed += sample_type__fprintf(fp, &first, evsel->attr.sample_type); |
1505 | if (evsel->attr.read_format) | |
1506 | printed += read_format__fprintf(fp, &first, evsel->attr.read_format); | |
0698aedd ACM |
1507 | if_print(disabled); |
1508 | if_print(inherit); | |
1509 | if_print(pinned); | |
1510 | if_print(exclusive); | |
1511 | if_print(exclude_user); | |
1512 | if_print(exclude_kernel); | |
1513 | if_print(exclude_hv); | |
1514 | if_print(exclude_idle); | |
1515 | if_print(mmap); | |
1516 | if_print(comm); | |
1517 | if_print(freq); | |
1518 | if_print(inherit_stat); | |
1519 | if_print(enable_on_exec); | |
1520 | if_print(task); | |
1521 | if_print(watermark); | |
1522 | if_print(precise_ip); | |
1523 | if_print(mmap_data); | |
1524 | if_print(sample_id_all); | |
1525 | if_print(exclude_host); | |
1526 | if_print(exclude_guest); | |
1527 | if_print(__reserved_1); | |
1528 | if_print(wakeup_events); | |
1529 | if_print(bp_type); | |
1530 | if_print(branch_sample_type); | |
1531 | } | |
e6ab07d0 | 1532 | out: |
0698aedd ACM |
1533 | fputc('\n', fp); |
1534 | return ++printed; | |
1535 | } | |
c0a54341 ACM |
1536 | |
1537 | bool perf_evsel__fallback(struct perf_evsel *evsel, int err, | |
1538 | char *msg, size_t msgsize) | |
1539 | { | |
2b821cce | 1540 | if ((err == ENOENT || err == ENXIO || err == ENODEV) && |
c0a54341 ACM |
1541 | evsel->attr.type == PERF_TYPE_HARDWARE && |
1542 | evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) { | |
1543 | /* | |
1544 | * If it's cycles then fall back to hrtimer based | |
1545 | * cpu-clock-tick sw counter, which is always available even if | |
1546 | * no PMU support. | |
1547 | * | |
1548 | * PPC returns ENXIO until 2.6.37 (behavior changed with commit | |
1549 | * b0a873e). | |
1550 | */ | |
1551 | scnprintf(msg, msgsize, "%s", | |
1552 | "The cycles event is not supported, trying to fall back to cpu-clock-ticks"); | |
1553 | ||
1554 | evsel->attr.type = PERF_TYPE_SOFTWARE; | |
1555 | evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK; | |
1556 | ||
1557 | free(evsel->name); | |
1558 | evsel->name = NULL; | |
1559 | return true; | |
1560 | } | |
1561 | ||
1562 | return false; | |
1563 | } | |
56e52e85 ACM |
1564 | |
1565 | int perf_evsel__open_strerror(struct perf_evsel *evsel, | |
1566 | struct perf_target *target, | |
1567 | int err, char *msg, size_t size) | |
1568 | { | |
1569 | switch (err) { | |
1570 | case EPERM: | |
1571 | case EACCES: | |
b69e63a4 | 1572 | return scnprintf(msg, size, |
56e52e85 ACM |
1573 | "You may not have permission to collect %sstats.\n" |
1574 | "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n" | |
1575 | " -1 - Not paranoid at all\n" | |
1576 | " 0 - Disallow raw tracepoint access for unpriv\n" | |
1577 | " 1 - Disallow cpu events for unpriv\n" | |
1578 | " 2 - Disallow kernel profiling for unpriv", | |
1579 | target->system_wide ? "system-wide " : ""); | |
1580 | case ENOENT: | |
1581 | return scnprintf(msg, size, "The %s event is not supported.", | |
1582 | perf_evsel__name(evsel)); | |
1583 | case EMFILE: | |
1584 | return scnprintf(msg, size, "%s", | |
1585 | "Too many events are opened.\n" | |
1586 | "Try again after reducing the number of events."); | |
1587 | case ENODEV: | |
1588 | if (target->cpu_list) | |
1589 | return scnprintf(msg, size, "%s", | |
1590 | "No such device - did you specify an out-of-range profile CPU?\n"); | |
1591 | break; | |
1592 | case EOPNOTSUPP: | |
1593 | if (evsel->attr.precise_ip) | |
1594 | return scnprintf(msg, size, "%s", | |
1595 | "\'precise\' request may not be supported. Try removing 'p' modifier."); | |
1596 | #if defined(__i386__) || defined(__x86_64__) | |
1597 | if (evsel->attr.type == PERF_TYPE_HARDWARE) | |
1598 | return scnprintf(msg, size, "%s", | |
1599 | "No hardware sampling interrupt available.\n" | |
1600 | "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it."); | |
1601 | #endif | |
1602 | break; | |
1603 | default: | |
1604 | break; | |
1605 | } | |
1606 | ||
1607 | return scnprintf(msg, size, | |
1608 | "The sys_perf_event_open() syscall returned with %d (%s) for event (%s). \n" | |
1609 | "/bin/dmesg may provide additional information.\n" | |
1610 | "No CONFIG_PERF_EVENTS=y kernel support configured?\n", | |
1611 | err, strerror(err), perf_evsel__name(evsel)); | |
1612 | } |