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> |
4605eab3 | 12 | #include <api/fs/tracing_path.h> |
4e319027 RR |
13 | #include <traceevent/event-parse.h> |
14 | #include <linux/hw_breakpoint.h> | |
15 | #include <linux/perf_event.h> | |
8dd2a131 | 16 | #include <linux/err.h> |
bec19672 | 17 | #include <sys/resource.h> |
4e319027 | 18 | #include "asm/bug.h" |
8f651eae | 19 | #include "callchain.h" |
f14d5707 | 20 | #include "cgroup.h" |
69aad6f1 | 21 | #include "evsel.h" |
70082dd9 | 22 | #include "evlist.h" |
69aad6f1 | 23 | #include "util.h" |
86bd5e86 | 24 | #include "cpumap.h" |
fd78260b | 25 | #include "thread_map.h" |
12864b31 | 26 | #include "target.h" |
26d33022 | 27 | #include "perf_regs.h" |
e3e1a54f | 28 | #include "debug.h" |
97978b3e | 29 | #include "trace-event.h" |
a9a3a4d9 | 30 | #include "stat.h" |
ac12f676 | 31 | #include "util/parse-branch-options.h" |
69aad6f1 | 32 | |
594ac61a ACM |
33 | static struct { |
34 | bool sample_id_all; | |
35 | bool exclude_guest; | |
5c5e854b | 36 | bool mmap2; |
57480d2c | 37 | bool cloexec; |
814c8c38 PZ |
38 | bool clockid; |
39 | bool clockid_wrong; | |
bd0f8895 | 40 | bool lbr_flags; |
b90dc17a | 41 | bool write_backward; |
594ac61a ACM |
42 | } perf_missing_features; |
43 | ||
814c8c38 PZ |
44 | static clockid_t clockid; |
45 | ||
ce8ccff5 ACM |
46 | static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused) |
47 | { | |
48 | return 0; | |
49 | } | |
50 | ||
51 | static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused) | |
52 | { | |
53 | } | |
54 | ||
55 | static struct { | |
56 | size_t size; | |
57 | int (*init)(struct perf_evsel *evsel); | |
58 | void (*fini)(struct perf_evsel *evsel); | |
59 | } perf_evsel__object = { | |
60 | .size = sizeof(struct perf_evsel), | |
61 | .init = perf_evsel__no_extra_init, | |
62 | .fini = perf_evsel__no_extra_fini, | |
63 | }; | |
64 | ||
65 | int perf_evsel__object_config(size_t object_size, | |
66 | int (*init)(struct perf_evsel *evsel), | |
67 | void (*fini)(struct perf_evsel *evsel)) | |
68 | { | |
69 | ||
70 | if (object_size == 0) | |
71 | goto set_methods; | |
72 | ||
73 | if (perf_evsel__object.size > object_size) | |
74 | return -EINVAL; | |
75 | ||
76 | perf_evsel__object.size = object_size; | |
77 | ||
78 | set_methods: | |
79 | if (init != NULL) | |
80 | perf_evsel__object.init = init; | |
81 | ||
82 | if (fini != NULL) | |
83 | perf_evsel__object.fini = fini; | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
c52b12ed ACM |
88 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
89 | ||
75562573 | 90 | int __perf_evsel__sample_size(u64 sample_type) |
c2a70653 ACM |
91 | { |
92 | u64 mask = sample_type & PERF_SAMPLE_MASK; | |
93 | int size = 0; | |
94 | int i; | |
95 | ||
96 | for (i = 0; i < 64; i++) { | |
97 | if (mask & (1ULL << i)) | |
98 | size++; | |
99 | } | |
100 | ||
101 | size *= sizeof(u64); | |
102 | ||
103 | return size; | |
104 | } | |
105 | ||
75562573 AH |
106 | /** |
107 | * __perf_evsel__calc_id_pos - calculate id_pos. | |
108 | * @sample_type: sample type | |
109 | * | |
110 | * This function returns the position of the event id (PERF_SAMPLE_ID or | |
111 | * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct | |
112 | * sample_event. | |
113 | */ | |
114 | static int __perf_evsel__calc_id_pos(u64 sample_type) | |
115 | { | |
116 | int idx = 0; | |
117 | ||
118 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
119 | return 0; | |
120 | ||
121 | if (!(sample_type & PERF_SAMPLE_ID)) | |
122 | return -1; | |
123 | ||
124 | if (sample_type & PERF_SAMPLE_IP) | |
125 | idx += 1; | |
126 | ||
127 | if (sample_type & PERF_SAMPLE_TID) | |
128 | idx += 1; | |
129 | ||
130 | if (sample_type & PERF_SAMPLE_TIME) | |
131 | idx += 1; | |
132 | ||
133 | if (sample_type & PERF_SAMPLE_ADDR) | |
134 | idx += 1; | |
135 | ||
136 | return idx; | |
137 | } | |
138 | ||
139 | /** | |
140 | * __perf_evsel__calc_is_pos - calculate is_pos. | |
141 | * @sample_type: sample type | |
142 | * | |
143 | * This function returns the position (counting backwards) of the event id | |
144 | * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if | |
145 | * sample_id_all is used there is an id sample appended to non-sample events. | |
146 | */ | |
147 | static int __perf_evsel__calc_is_pos(u64 sample_type) | |
148 | { | |
149 | int idx = 1; | |
150 | ||
151 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
152 | return 1; | |
153 | ||
154 | if (!(sample_type & PERF_SAMPLE_ID)) | |
155 | return -1; | |
156 | ||
157 | if (sample_type & PERF_SAMPLE_CPU) | |
158 | idx += 1; | |
159 | ||
160 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
161 | idx += 1; | |
162 | ||
163 | return idx; | |
164 | } | |
165 | ||
166 | void perf_evsel__calc_id_pos(struct perf_evsel *evsel) | |
167 | { | |
168 | evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type); | |
169 | evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type); | |
170 | } | |
171 | ||
7be5ebe8 ACM |
172 | void __perf_evsel__set_sample_bit(struct perf_evsel *evsel, |
173 | enum perf_event_sample_format bit) | |
174 | { | |
175 | if (!(evsel->attr.sample_type & bit)) { | |
176 | evsel->attr.sample_type |= bit; | |
177 | evsel->sample_size += sizeof(u64); | |
75562573 | 178 | perf_evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
179 | } |
180 | } | |
181 | ||
182 | void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel, | |
183 | enum perf_event_sample_format bit) | |
184 | { | |
185 | if (evsel->attr.sample_type & bit) { | |
186 | evsel->attr.sample_type &= ~bit; | |
187 | evsel->sample_size -= sizeof(u64); | |
75562573 | 188 | perf_evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
189 | } |
190 | } | |
191 | ||
75562573 AH |
192 | void perf_evsel__set_sample_id(struct perf_evsel *evsel, |
193 | bool can_sample_identifier) | |
7a5a5ca5 | 194 | { |
75562573 AH |
195 | if (can_sample_identifier) { |
196 | perf_evsel__reset_sample_bit(evsel, ID); | |
197 | perf_evsel__set_sample_bit(evsel, IDENTIFIER); | |
198 | } else { | |
199 | perf_evsel__set_sample_bit(evsel, ID); | |
200 | } | |
7a5a5ca5 ACM |
201 | evsel->attr.read_format |= PERF_FORMAT_ID; |
202 | } | |
203 | ||
5496bc0c ACM |
204 | /** |
205 | * perf_evsel__is_function_event - Return whether given evsel is a function | |
206 | * trace event | |
207 | * | |
208 | * @evsel - evsel selector to be tested | |
209 | * | |
210 | * Return %true if event is function trace event | |
211 | */ | |
212 | bool perf_evsel__is_function_event(struct perf_evsel *evsel) | |
213 | { | |
214 | #define FUNCTION_EVENT "ftrace:function" | |
215 | ||
216 | return evsel->name && | |
217 | !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT)); | |
218 | ||
219 | #undef FUNCTION_EVENT | |
220 | } | |
221 | ||
ef1d1af2 ACM |
222 | void perf_evsel__init(struct perf_evsel *evsel, |
223 | struct perf_event_attr *attr, int idx) | |
224 | { | |
225 | evsel->idx = idx; | |
60b0896c | 226 | evsel->tracking = !idx; |
ef1d1af2 | 227 | evsel->attr = *attr; |
2cfda562 | 228 | evsel->leader = evsel; |
410136f5 SE |
229 | evsel->unit = ""; |
230 | evsel->scale = 1.0; | |
d49e4695 | 231 | evsel->evlist = NULL; |
1f45b1d4 | 232 | evsel->bpf_fd = -1; |
ef1d1af2 | 233 | INIT_LIST_HEAD(&evsel->node); |
930a2e29 | 234 | INIT_LIST_HEAD(&evsel->config_terms); |
ce8ccff5 | 235 | perf_evsel__object.init(evsel); |
bde09467 | 236 | evsel->sample_size = __perf_evsel__sample_size(attr->sample_type); |
75562573 | 237 | perf_evsel__calc_id_pos(evsel); |
15bfd2cc | 238 | evsel->cmdline_group_boundary = false; |
37932c18 | 239 | evsel->metric_expr = NULL; |
96284814 | 240 | evsel->metric_name = NULL; |
37932c18 AK |
241 | evsel->metric_events = NULL; |
242 | evsel->collect_stat = false; | |
ef1d1af2 ACM |
243 | } |
244 | ||
ef503831 | 245 | struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) |
69aad6f1 | 246 | { |
ce8ccff5 | 247 | struct perf_evsel *evsel = zalloc(perf_evsel__object.size); |
69aad6f1 | 248 | |
ef1d1af2 ACM |
249 | if (evsel != NULL) |
250 | perf_evsel__init(evsel, attr, idx); | |
69aad6f1 | 251 | |
03e0a7df | 252 | if (perf_evsel__is_bpf_output(evsel)) { |
d37ba880 WN |
253 | evsel->attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | |
254 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
03e0a7df WN |
255 | evsel->attr.sample_period = 1; |
256 | } | |
257 | ||
69aad6f1 ACM |
258 | return evsel; |
259 | } | |
260 | ||
7c48dcfd ACM |
261 | struct perf_evsel *perf_evsel__new_cycles(void) |
262 | { | |
263 | struct perf_event_attr attr = { | |
264 | .type = PERF_TYPE_HARDWARE, | |
265 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
266 | }; | |
267 | struct perf_evsel *evsel; | |
268 | ||
269 | event_attr_init(&attr); | |
270 | ||
271 | perf_event_attr__set_max_precise_ip(&attr); | |
272 | ||
273 | evsel = perf_evsel__new(&attr); | |
274 | if (evsel == NULL) | |
275 | goto out; | |
276 | ||
277 | /* use asprintf() because free(evsel) assumes name is allocated */ | |
278 | if (asprintf(&evsel->name, "cycles%.*s", | |
279 | attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0) | |
280 | goto error_free; | |
281 | out: | |
282 | return evsel; | |
283 | error_free: | |
284 | perf_evsel__delete(evsel); | |
285 | evsel = NULL; | |
286 | goto out; | |
287 | } | |
288 | ||
8dd2a131 JO |
289 | /* |
290 | * Returns pointer with encoded error via <linux/err.h> interface. | |
291 | */ | |
ef503831 | 292 | struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx) |
efd2b924 | 293 | { |
ce8ccff5 | 294 | struct perf_evsel *evsel = zalloc(perf_evsel__object.size); |
8dd2a131 | 295 | int err = -ENOMEM; |
efd2b924 | 296 | |
8dd2a131 JO |
297 | if (evsel == NULL) { |
298 | goto out_err; | |
299 | } else { | |
efd2b924 | 300 | struct perf_event_attr attr = { |
0b80f8b3 ACM |
301 | .type = PERF_TYPE_TRACEPOINT, |
302 | .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | | |
303 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
efd2b924 ACM |
304 | }; |
305 | ||
e48ffe2b ACM |
306 | if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) |
307 | goto out_free; | |
308 | ||
97978b3e | 309 | evsel->tp_format = trace_event__tp_format(sys, name); |
8dd2a131 JO |
310 | if (IS_ERR(evsel->tp_format)) { |
311 | err = PTR_ERR(evsel->tp_format); | |
efd2b924 | 312 | goto out_free; |
8dd2a131 | 313 | } |
efd2b924 | 314 | |
0b80f8b3 | 315 | event_attr_init(&attr); |
efd2b924 | 316 | attr.config = evsel->tp_format->id; |
0b80f8b3 | 317 | attr.sample_period = 1; |
efd2b924 | 318 | perf_evsel__init(evsel, &attr, idx); |
efd2b924 ACM |
319 | } |
320 | ||
321 | return evsel; | |
322 | ||
323 | out_free: | |
74cf249d | 324 | zfree(&evsel->name); |
efd2b924 | 325 | free(evsel); |
8dd2a131 JO |
326 | out_err: |
327 | return ERR_PTR(err); | |
efd2b924 ACM |
328 | } |
329 | ||
8ad7013b | 330 | const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = { |
c410431c ACM |
331 | "cycles", |
332 | "instructions", | |
333 | "cache-references", | |
334 | "cache-misses", | |
335 | "branches", | |
336 | "branch-misses", | |
337 | "bus-cycles", | |
338 | "stalled-cycles-frontend", | |
339 | "stalled-cycles-backend", | |
340 | "ref-cycles", | |
341 | }; | |
342 | ||
dd4f5223 | 343 | static const char *__perf_evsel__hw_name(u64 config) |
c410431c ACM |
344 | { |
345 | if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config]) | |
346 | return perf_evsel__hw_names[config]; | |
347 | ||
348 | return "unknown-hardware"; | |
349 | } | |
350 | ||
27f18617 | 351 | static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size) |
c410431c | 352 | { |
27f18617 | 353 | int colon = 0, r = 0; |
c410431c | 354 | struct perf_event_attr *attr = &evsel->attr; |
c410431c ACM |
355 | bool exclude_guest_default = false; |
356 | ||
357 | #define MOD_PRINT(context, mod) do { \ | |
358 | if (!attr->exclude_##context) { \ | |
27f18617 | 359 | if (!colon) colon = ++r; \ |
c410431c ACM |
360 | r += scnprintf(bf + r, size - r, "%c", mod); \ |
361 | } } while(0) | |
362 | ||
363 | if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { | |
364 | MOD_PRINT(kernel, 'k'); | |
365 | MOD_PRINT(user, 'u'); | |
366 | MOD_PRINT(hv, 'h'); | |
367 | exclude_guest_default = true; | |
368 | } | |
369 | ||
370 | if (attr->precise_ip) { | |
371 | if (!colon) | |
27f18617 | 372 | colon = ++r; |
c410431c ACM |
373 | r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); |
374 | exclude_guest_default = true; | |
375 | } | |
376 | ||
377 | if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { | |
378 | MOD_PRINT(host, 'H'); | |
379 | MOD_PRINT(guest, 'G'); | |
380 | } | |
381 | #undef MOD_PRINT | |
382 | if (colon) | |
27f18617 | 383 | bf[colon - 1] = ':'; |
c410431c ACM |
384 | return r; |
385 | } | |
386 | ||
27f18617 ACM |
387 | static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size) |
388 | { | |
389 | int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config)); | |
390 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
391 | } | |
392 | ||
8ad7013b | 393 | const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = { |
335c2f5d ACM |
394 | "cpu-clock", |
395 | "task-clock", | |
396 | "page-faults", | |
397 | "context-switches", | |
8ad7013b | 398 | "cpu-migrations", |
335c2f5d ACM |
399 | "minor-faults", |
400 | "major-faults", | |
401 | "alignment-faults", | |
402 | "emulation-faults", | |
d22d1a2a | 403 | "dummy", |
335c2f5d ACM |
404 | }; |
405 | ||
dd4f5223 | 406 | static const char *__perf_evsel__sw_name(u64 config) |
335c2f5d ACM |
407 | { |
408 | if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config]) | |
409 | return perf_evsel__sw_names[config]; | |
410 | return "unknown-software"; | |
411 | } | |
412 | ||
413 | static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size) | |
414 | { | |
415 | int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config)); | |
416 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
417 | } | |
418 | ||
287e74aa JO |
419 | static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) |
420 | { | |
421 | int r; | |
422 | ||
423 | r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); | |
424 | ||
425 | if (type & HW_BREAKPOINT_R) | |
426 | r += scnprintf(bf + r, size - r, "r"); | |
427 | ||
428 | if (type & HW_BREAKPOINT_W) | |
429 | r += scnprintf(bf + r, size - r, "w"); | |
430 | ||
431 | if (type & HW_BREAKPOINT_X) | |
432 | r += scnprintf(bf + r, size - r, "x"); | |
433 | ||
434 | return r; | |
435 | } | |
436 | ||
437 | static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size) | |
438 | { | |
439 | struct perf_event_attr *attr = &evsel->attr; | |
440 | int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); | |
441 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
442 | } | |
443 | ||
0b668bc9 ACM |
444 | const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX] |
445 | [PERF_EVSEL__MAX_ALIASES] = { | |
446 | { "L1-dcache", "l1-d", "l1d", "L1-data", }, | |
447 | { "L1-icache", "l1-i", "l1i", "L1-instruction", }, | |
448 | { "LLC", "L2", }, | |
449 | { "dTLB", "d-tlb", "Data-TLB", }, | |
450 | { "iTLB", "i-tlb", "Instruction-TLB", }, | |
451 | { "branch", "branches", "bpu", "btb", "bpc", }, | |
452 | { "node", }, | |
453 | }; | |
454 | ||
455 | const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX] | |
456 | [PERF_EVSEL__MAX_ALIASES] = { | |
457 | { "load", "loads", "read", }, | |
458 | { "store", "stores", "write", }, | |
459 | { "prefetch", "prefetches", "speculative-read", "speculative-load", }, | |
460 | }; | |
461 | ||
462 | const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX] | |
463 | [PERF_EVSEL__MAX_ALIASES] = { | |
464 | { "refs", "Reference", "ops", "access", }, | |
465 | { "misses", "miss", }, | |
466 | }; | |
467 | ||
468 | #define C(x) PERF_COUNT_HW_CACHE_##x | |
469 | #define CACHE_READ (1 << C(OP_READ)) | |
470 | #define CACHE_WRITE (1 << C(OP_WRITE)) | |
471 | #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) | |
472 | #define COP(x) (1 << x) | |
473 | ||
474 | /* | |
475 | * cache operartion stat | |
476 | * L1I : Read and prefetch only | |
477 | * ITLB and BPU : Read-only | |
478 | */ | |
479 | static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = { | |
480 | [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
481 | [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), | |
482 | [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
483 | [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
484 | [C(ITLB)] = (CACHE_READ), | |
485 | [C(BPU)] = (CACHE_READ), | |
486 | [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
487 | }; | |
488 | ||
489 | bool perf_evsel__is_cache_op_valid(u8 type, u8 op) | |
490 | { | |
491 | if (perf_evsel__hw_cache_stat[type] & COP(op)) | |
492 | return true; /* valid */ | |
493 | else | |
494 | return false; /* invalid */ | |
495 | } | |
496 | ||
497 | int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, | |
498 | char *bf, size_t size) | |
499 | { | |
500 | if (result) { | |
501 | return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0], | |
502 | perf_evsel__hw_cache_op[op][0], | |
503 | perf_evsel__hw_cache_result[result][0]); | |
504 | } | |
505 | ||
506 | return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0], | |
507 | perf_evsel__hw_cache_op[op][1]); | |
508 | } | |
509 | ||
dd4f5223 | 510 | static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size) |
0b668bc9 ACM |
511 | { |
512 | u8 op, result, type = (config >> 0) & 0xff; | |
513 | const char *err = "unknown-ext-hardware-cache-type"; | |
514 | ||
c53412ee | 515 | if (type >= PERF_COUNT_HW_CACHE_MAX) |
0b668bc9 ACM |
516 | goto out_err; |
517 | ||
518 | op = (config >> 8) & 0xff; | |
519 | err = "unknown-ext-hardware-cache-op"; | |
c53412ee | 520 | if (op >= PERF_COUNT_HW_CACHE_OP_MAX) |
0b668bc9 ACM |
521 | goto out_err; |
522 | ||
523 | result = (config >> 16) & 0xff; | |
524 | err = "unknown-ext-hardware-cache-result"; | |
c53412ee | 525 | if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX) |
0b668bc9 ACM |
526 | goto out_err; |
527 | ||
528 | err = "invalid-cache"; | |
529 | if (!perf_evsel__is_cache_op_valid(type, op)) | |
530 | goto out_err; | |
531 | ||
532 | return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size); | |
533 | out_err: | |
534 | return scnprintf(bf, size, "%s", err); | |
535 | } | |
536 | ||
537 | static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size) | |
538 | { | |
539 | int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size); | |
540 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
541 | } | |
542 | ||
6eef3d9c ACM |
543 | static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size) |
544 | { | |
545 | int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config); | |
546 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
547 | } | |
548 | ||
7289f83c | 549 | const char *perf_evsel__name(struct perf_evsel *evsel) |
a4460836 | 550 | { |
7289f83c | 551 | char bf[128]; |
a4460836 | 552 | |
7289f83c ACM |
553 | if (evsel->name) |
554 | return evsel->name; | |
c410431c ACM |
555 | |
556 | switch (evsel->attr.type) { | |
557 | case PERF_TYPE_RAW: | |
6eef3d9c | 558 | perf_evsel__raw_name(evsel, bf, sizeof(bf)); |
c410431c ACM |
559 | break; |
560 | ||
561 | case PERF_TYPE_HARDWARE: | |
7289f83c | 562 | perf_evsel__hw_name(evsel, bf, sizeof(bf)); |
c410431c | 563 | break; |
0b668bc9 ACM |
564 | |
565 | case PERF_TYPE_HW_CACHE: | |
7289f83c | 566 | perf_evsel__hw_cache_name(evsel, bf, sizeof(bf)); |
0b668bc9 ACM |
567 | break; |
568 | ||
335c2f5d | 569 | case PERF_TYPE_SOFTWARE: |
7289f83c | 570 | perf_evsel__sw_name(evsel, bf, sizeof(bf)); |
335c2f5d ACM |
571 | break; |
572 | ||
a4460836 | 573 | case PERF_TYPE_TRACEPOINT: |
7289f83c | 574 | scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); |
a4460836 ACM |
575 | break; |
576 | ||
287e74aa JO |
577 | case PERF_TYPE_BREAKPOINT: |
578 | perf_evsel__bp_name(evsel, bf, sizeof(bf)); | |
579 | break; | |
580 | ||
c410431c | 581 | default: |
ca1b1457 RR |
582 | scnprintf(bf, sizeof(bf), "unknown attr type: %d", |
583 | evsel->attr.type); | |
a4460836 | 584 | break; |
c410431c ACM |
585 | } |
586 | ||
7289f83c ACM |
587 | evsel->name = strdup(bf); |
588 | ||
589 | return evsel->name ?: "unknown"; | |
c410431c ACM |
590 | } |
591 | ||
717e263f NK |
592 | const char *perf_evsel__group_name(struct perf_evsel *evsel) |
593 | { | |
594 | return evsel->group_name ?: "anon group"; | |
595 | } | |
596 | ||
597 | int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size) | |
598 | { | |
599 | int ret; | |
600 | struct perf_evsel *pos; | |
601 | const char *group_name = perf_evsel__group_name(evsel); | |
602 | ||
603 | ret = scnprintf(buf, size, "%s", group_name); | |
604 | ||
605 | ret += scnprintf(buf + ret, size - ret, " { %s", | |
606 | perf_evsel__name(evsel)); | |
607 | ||
608 | for_each_group_member(pos, evsel) | |
609 | ret += scnprintf(buf + ret, size - ret, ", %s", | |
610 | perf_evsel__name(pos)); | |
611 | ||
612 | ret += scnprintf(buf + ret, size - ret, " }"); | |
613 | ||
614 | return ret; | |
615 | } | |
616 | ||
01e0d50c ACM |
617 | void perf_evsel__config_callchain(struct perf_evsel *evsel, |
618 | struct record_opts *opts, | |
619 | struct callchain_param *param) | |
6bedfab6 JO |
620 | { |
621 | bool function = perf_evsel__is_function_event(evsel); | |
622 | struct perf_event_attr *attr = &evsel->attr; | |
623 | ||
624 | perf_evsel__set_sample_bit(evsel, CALLCHAIN); | |
625 | ||
792d48b4 ACM |
626 | attr->sample_max_stack = param->max_stack; |
627 | ||
c3a6a8c4 | 628 | if (param->record_mode == CALLCHAIN_LBR) { |
aad2b21c KL |
629 | if (!opts->branch_stack) { |
630 | if (attr->exclude_user) { | |
631 | pr_warning("LBR callstack option is only available " | |
632 | "to get user callchain information. " | |
633 | "Falling back to framepointers.\n"); | |
634 | } else { | |
635 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); | |
636 | attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER | | |
bd0f8895 AK |
637 | PERF_SAMPLE_BRANCH_CALL_STACK | |
638 | PERF_SAMPLE_BRANCH_NO_CYCLES | | |
639 | PERF_SAMPLE_BRANCH_NO_FLAGS; | |
aad2b21c KL |
640 | } |
641 | } else | |
642 | pr_warning("Cannot use LBR callstack with branch stack. " | |
643 | "Falling back to framepointers.\n"); | |
644 | } | |
645 | ||
c3a6a8c4 | 646 | if (param->record_mode == CALLCHAIN_DWARF) { |
6bedfab6 JO |
647 | if (!function) { |
648 | perf_evsel__set_sample_bit(evsel, REGS_USER); | |
649 | perf_evsel__set_sample_bit(evsel, STACK_USER); | |
650 | attr->sample_regs_user = PERF_REGS_MASK; | |
c3a6a8c4 | 651 | attr->sample_stack_user = param->dump_size; |
6bedfab6 JO |
652 | attr->exclude_callchain_user = 1; |
653 | } else { | |
654 | pr_info("Cannot use DWARF unwind for function trace event," | |
655 | " falling back to framepointers.\n"); | |
656 | } | |
657 | } | |
658 | ||
659 | if (function) { | |
660 | pr_info("Disabling user space callchains for function trace event.\n"); | |
661 | attr->exclude_callchain_user = 1; | |
662 | } | |
663 | } | |
664 | ||
d457c963 KL |
665 | static void |
666 | perf_evsel__reset_callgraph(struct perf_evsel *evsel, | |
667 | struct callchain_param *param) | |
668 | { | |
669 | struct perf_event_attr *attr = &evsel->attr; | |
670 | ||
671 | perf_evsel__reset_sample_bit(evsel, CALLCHAIN); | |
672 | if (param->record_mode == CALLCHAIN_LBR) { | |
673 | perf_evsel__reset_sample_bit(evsel, BRANCH_STACK); | |
674 | attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER | | |
675 | PERF_SAMPLE_BRANCH_CALL_STACK); | |
676 | } | |
677 | if (param->record_mode == CALLCHAIN_DWARF) { | |
678 | perf_evsel__reset_sample_bit(evsel, REGS_USER); | |
679 | perf_evsel__reset_sample_bit(evsel, STACK_USER); | |
680 | } | |
681 | } | |
682 | ||
683 | static void apply_config_terms(struct perf_evsel *evsel, | |
684 | struct record_opts *opts) | |
930a2e29 JO |
685 | { |
686 | struct perf_evsel_config_term *term; | |
32067712 KL |
687 | struct list_head *config_terms = &evsel->config_terms; |
688 | struct perf_event_attr *attr = &evsel->attr; | |
d457c963 KL |
689 | struct callchain_param param; |
690 | u32 dump_size = 0; | |
792d48b4 ACM |
691 | int max_stack = 0; |
692 | const char *callgraph_buf = NULL; | |
d457c963 KL |
693 | |
694 | /* callgraph default */ | |
695 | param.record_mode = callchain_param.record_mode; | |
930a2e29 JO |
696 | |
697 | list_for_each_entry(term, config_terms, list) { | |
698 | switch (term->type) { | |
ee4c7588 JO |
699 | case PERF_EVSEL__CONFIG_TERM_PERIOD: |
700 | attr->sample_period = term->val.period; | |
ab35a7d0 | 701 | attr->freq = 0; |
32067712 | 702 | break; |
09af2a55 NK |
703 | case PERF_EVSEL__CONFIG_TERM_FREQ: |
704 | attr->sample_freq = term->val.freq; | |
705 | attr->freq = 1; | |
706 | break; | |
32067712 KL |
707 | case PERF_EVSEL__CONFIG_TERM_TIME: |
708 | if (term->val.time) | |
709 | perf_evsel__set_sample_bit(evsel, TIME); | |
710 | else | |
711 | perf_evsel__reset_sample_bit(evsel, TIME); | |
712 | break; | |
d457c963 KL |
713 | case PERF_EVSEL__CONFIG_TERM_CALLGRAPH: |
714 | callgraph_buf = term->val.callgraph; | |
715 | break; | |
ac12f676 AK |
716 | case PERF_EVSEL__CONFIG_TERM_BRANCH: |
717 | if (term->val.branch && strcmp(term->val.branch, "no")) { | |
718 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); | |
719 | parse_branch_str(term->val.branch, | |
720 | &attr->branch_sample_type); | |
721 | } else | |
722 | perf_evsel__reset_sample_bit(evsel, BRANCH_STACK); | |
723 | break; | |
d457c963 KL |
724 | case PERF_EVSEL__CONFIG_TERM_STACK_USER: |
725 | dump_size = term->val.stack_user; | |
726 | break; | |
792d48b4 ACM |
727 | case PERF_EVSEL__CONFIG_TERM_MAX_STACK: |
728 | max_stack = term->val.max_stack; | |
729 | break; | |
374ce938 WN |
730 | case PERF_EVSEL__CONFIG_TERM_INHERIT: |
731 | /* | |
732 | * attr->inherit should has already been set by | |
733 | * perf_evsel__config. If user explicitly set | |
734 | * inherit using config terms, override global | |
735 | * opt->no_inherit setting. | |
736 | */ | |
737 | attr->inherit = term->val.inherit ? 1 : 0; | |
738 | break; | |
626a6b78 WN |
739 | case PERF_EVSEL__CONFIG_TERM_OVERWRITE: |
740 | attr->write_backward = term->val.overwrite ? 1 : 0; | |
741 | break; | |
930a2e29 JO |
742 | default: |
743 | break; | |
744 | } | |
745 | } | |
d457c963 KL |
746 | |
747 | /* User explicitly set per-event callgraph, clear the old setting and reset. */ | |
792d48b4 ACM |
748 | if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) { |
749 | if (max_stack) { | |
750 | param.max_stack = max_stack; | |
751 | if (callgraph_buf == NULL) | |
752 | callgraph_buf = "fp"; | |
753 | } | |
d457c963 KL |
754 | |
755 | /* parse callgraph parameters */ | |
756 | if (callgraph_buf != NULL) { | |
f9db0d0f KL |
757 | if (!strcmp(callgraph_buf, "no")) { |
758 | param.enabled = false; | |
759 | param.record_mode = CALLCHAIN_NONE; | |
760 | } else { | |
761 | param.enabled = true; | |
762 | if (parse_callchain_record(callgraph_buf, ¶m)) { | |
763 | pr_err("per-event callgraph setting for %s failed. " | |
764 | "Apply callgraph global setting for it\n", | |
765 | evsel->name); | |
766 | return; | |
767 | } | |
d457c963 KL |
768 | } |
769 | } | |
770 | if (dump_size > 0) { | |
771 | dump_size = round_up(dump_size, sizeof(u64)); | |
772 | param.dump_size = dump_size; | |
773 | } | |
774 | ||
775 | /* If global callgraph set, clear it */ | |
776 | if (callchain_param.enabled) | |
777 | perf_evsel__reset_callgraph(evsel, &callchain_param); | |
778 | ||
779 | /* set perf-event callgraph */ | |
780 | if (param.enabled) | |
01e0d50c | 781 | perf_evsel__config_callchain(evsel, opts, ¶m); |
d457c963 | 782 | } |
930a2e29 JO |
783 | } |
784 | ||
774cb499 JO |
785 | /* |
786 | * The enable_on_exec/disabled value strategy: | |
787 | * | |
788 | * 1) For any type of traced program: | |
789 | * - all independent events and group leaders are disabled | |
790 | * - all group members are enabled | |
791 | * | |
792 | * Group members are ruled by group leaders. They need to | |
793 | * be enabled, because the group scheduling relies on that. | |
794 | * | |
795 | * 2) For traced programs executed by perf: | |
796 | * - all independent events and group leaders have | |
797 | * enable_on_exec set | |
798 | * - we don't specifically enable or disable any event during | |
799 | * the record command | |
800 | * | |
801 | * Independent events and group leaders are initially disabled | |
802 | * and get enabled by exec. Group members are ruled by group | |
803 | * leaders as stated in 1). | |
804 | * | |
805 | * 3) For traced programs attached by perf (pid/tid): | |
806 | * - we specifically enable or disable all events during | |
807 | * the record command | |
808 | * | |
809 | * When attaching events to already running traced we | |
810 | * enable/disable events specifically, as there's no | |
811 | * initial traced exec call. | |
812 | */ | |
e68ae9cf ACM |
813 | void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts, |
814 | struct callchain_param *callchain) | |
0f82ebc4 | 815 | { |
3c176311 | 816 | struct perf_evsel *leader = evsel->leader; |
0f82ebc4 | 817 | struct perf_event_attr *attr = &evsel->attr; |
60b0896c | 818 | int track = evsel->tracking; |
3aa5939d | 819 | bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread; |
0f82ebc4 | 820 | |
594ac61a | 821 | attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; |
0f82ebc4 | 822 | attr->inherit = !opts->no_inherit; |
626a6b78 | 823 | attr->write_backward = opts->overwrite ? 1 : 0; |
0f82ebc4 | 824 | |
7be5ebe8 ACM |
825 | perf_evsel__set_sample_bit(evsel, IP); |
826 | perf_evsel__set_sample_bit(evsel, TID); | |
0f82ebc4 | 827 | |
3c176311 JO |
828 | if (evsel->sample_read) { |
829 | perf_evsel__set_sample_bit(evsel, READ); | |
830 | ||
831 | /* | |
832 | * We need ID even in case of single event, because | |
833 | * PERF_SAMPLE_READ process ID specific data. | |
834 | */ | |
75562573 | 835 | perf_evsel__set_sample_id(evsel, false); |
3c176311 JO |
836 | |
837 | /* | |
838 | * Apply group format only if we belong to group | |
839 | * with more than one members. | |
840 | */ | |
841 | if (leader->nr_members > 1) { | |
842 | attr->read_format |= PERF_FORMAT_GROUP; | |
843 | attr->inherit = 0; | |
844 | } | |
845 | } | |
846 | ||
0f82ebc4 | 847 | /* |
17314e23 | 848 | * We default some events to have a default interval. But keep |
0f82ebc4 ACM |
849 | * it a weak assumption overridable by the user. |
850 | */ | |
17314e23 | 851 | if (!attr->sample_period || (opts->user_freq != UINT_MAX || |
0f82ebc4 ACM |
852 | opts->user_interval != ULLONG_MAX)) { |
853 | if (opts->freq) { | |
7be5ebe8 | 854 | perf_evsel__set_sample_bit(evsel, PERIOD); |
0f82ebc4 ACM |
855 | attr->freq = 1; |
856 | attr->sample_freq = opts->freq; | |
857 | } else { | |
858 | attr->sample_period = opts->default_interval; | |
859 | } | |
860 | } | |
861 | ||
3c176311 JO |
862 | /* |
863 | * Disable sampling for all group members other | |
864 | * than leader in case leader 'leads' the sampling. | |
865 | */ | |
866 | if ((leader != evsel) && leader->sample_read) { | |
867 | attr->sample_freq = 0; | |
868 | attr->sample_period = 0; | |
869 | } | |
870 | ||
0f82ebc4 ACM |
871 | if (opts->no_samples) |
872 | attr->sample_freq = 0; | |
873 | ||
874 | if (opts->inherit_stat) | |
875 | attr->inherit_stat = 1; | |
876 | ||
877 | if (opts->sample_address) { | |
7be5ebe8 | 878 | perf_evsel__set_sample_bit(evsel, ADDR); |
0f82ebc4 ACM |
879 | attr->mmap_data = track; |
880 | } | |
881 | ||
f140373b JO |
882 | /* |
883 | * We don't allow user space callchains for function trace | |
884 | * event, due to issues with page faults while tracing page | |
885 | * fault handler and its overall trickiness nature. | |
886 | */ | |
887 | if (perf_evsel__is_function_event(evsel)) | |
888 | evsel->attr.exclude_callchain_user = 1; | |
889 | ||
e68ae9cf | 890 | if (callchain && callchain->enabled && !evsel->no_aux_samples) |
01e0d50c | 891 | perf_evsel__config_callchain(evsel, opts, callchain); |
26d33022 | 892 | |
6a21c0b5 | 893 | if (opts->sample_intr_regs) { |
bcc84ec6 | 894 | attr->sample_regs_intr = opts->sample_intr_regs; |
6a21c0b5 SE |
895 | perf_evsel__set_sample_bit(evsel, REGS_INTR); |
896 | } | |
897 | ||
b6f35ed7 | 898 | if (target__has_cpu(&opts->target) || opts->sample_cpu) |
7be5ebe8 | 899 | perf_evsel__set_sample_bit(evsel, CPU); |
0f82ebc4 | 900 | |
3e76ac78 | 901 | if (opts->period) |
7be5ebe8 | 902 | perf_evsel__set_sample_bit(evsel, PERIOD); |
3e76ac78 | 903 | |
8affc2b8 | 904 | /* |
bd1a0be5 | 905 | * When the user explicitly disabled time don't force it here. |
8affc2b8 AK |
906 | */ |
907 | if (opts->sample_time && | |
908 | (!perf_missing_features.sample_id_all && | |
3abebc55 AH |
909 | (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu || |
910 | opts->sample_time_set))) | |
7be5ebe8 | 911 | perf_evsel__set_sample_bit(evsel, TIME); |
0f82ebc4 | 912 | |
6ff1ce76 | 913 | if (opts->raw_samples && !evsel->no_aux_samples) { |
7be5ebe8 ACM |
914 | perf_evsel__set_sample_bit(evsel, TIME); |
915 | perf_evsel__set_sample_bit(evsel, RAW); | |
916 | perf_evsel__set_sample_bit(evsel, CPU); | |
0f82ebc4 ACM |
917 | } |
918 | ||
ccf49bfc | 919 | if (opts->sample_address) |
1e7ed5ec | 920 | perf_evsel__set_sample_bit(evsel, DATA_SRC); |
ccf49bfc | 921 | |
509051ea | 922 | if (opts->no_buffering) { |
0f82ebc4 ACM |
923 | attr->watermark = 0; |
924 | attr->wakeup_events = 1; | |
925 | } | |
6ff1ce76 | 926 | if (opts->branch_stack && !evsel->no_aux_samples) { |
7be5ebe8 | 927 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); |
bdfebd84 RAV |
928 | attr->branch_sample_type = opts->branch_stack; |
929 | } | |
0f82ebc4 | 930 | |
05484298 | 931 | if (opts->sample_weight) |
1e7ed5ec | 932 | perf_evsel__set_sample_bit(evsel, WEIGHT); |
05484298 | 933 | |
62e503b7 | 934 | attr->task = track; |
5c5e854b | 935 | attr->mmap = track; |
a5a5ba72 | 936 | attr->mmap2 = track && !perf_missing_features.mmap2; |
5c5e854b | 937 | attr->comm = track; |
0f82ebc4 | 938 | |
f3b3614a HB |
939 | if (opts->record_namespaces) |
940 | attr->namespaces = track; | |
941 | ||
b757bb09 AH |
942 | if (opts->record_switch_events) |
943 | attr->context_switch = track; | |
944 | ||
475eeab9 | 945 | if (opts->sample_transaction) |
1e7ed5ec | 946 | perf_evsel__set_sample_bit(evsel, TRANSACTION); |
475eeab9 | 947 | |
85c273d2 AK |
948 | if (opts->running_time) { |
949 | evsel->attr.read_format |= | |
950 | PERF_FORMAT_TOTAL_TIME_ENABLED | | |
951 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
952 | } | |
953 | ||
774cb499 JO |
954 | /* |
955 | * XXX see the function comment above | |
956 | * | |
957 | * Disabling only independent events or group leaders, | |
958 | * keeping group members enabled. | |
959 | */ | |
823254ed | 960 | if (perf_evsel__is_group_leader(evsel)) |
774cb499 JO |
961 | attr->disabled = 1; |
962 | ||
963 | /* | |
964 | * Setting enable_on_exec for independent events and | |
965 | * group leaders for traced executed by perf. | |
966 | */ | |
6619a53e AK |
967 | if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) && |
968 | !opts->initial_delay) | |
0f82ebc4 | 969 | attr->enable_on_exec = 1; |
2afd2bcf AH |
970 | |
971 | if (evsel->immediate) { | |
972 | attr->disabled = 0; | |
973 | attr->enable_on_exec = 0; | |
974 | } | |
814c8c38 PZ |
975 | |
976 | clockid = opts->clockid; | |
977 | if (opts->use_clockid) { | |
978 | attr->use_clockid = 1; | |
979 | attr->clockid = opts->clockid; | |
980 | } | |
930a2e29 | 981 | |
7f94af7a JO |
982 | if (evsel->precise_max) |
983 | perf_event_attr__set_max_precise_ip(attr); | |
984 | ||
85723885 JO |
985 | if (opts->all_user) { |
986 | attr->exclude_kernel = 1; | |
987 | attr->exclude_user = 0; | |
988 | } | |
989 | ||
990 | if (opts->all_kernel) { | |
991 | attr->exclude_kernel = 0; | |
992 | attr->exclude_user = 1; | |
993 | } | |
994 | ||
930a2e29 JO |
995 | /* |
996 | * Apply event specific term settings, | |
997 | * it overloads any global configuration. | |
998 | */ | |
d457c963 | 999 | apply_config_terms(evsel, opts); |
a359c17a JO |
1000 | |
1001 | evsel->ignore_missing_thread = opts->ignore_missing_thread; | |
0f82ebc4 ACM |
1002 | } |
1003 | ||
8885846f | 1004 | static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
69aad6f1 | 1005 | { |
bf8e8f4b AH |
1006 | if (evsel->system_wide) |
1007 | nthreads = 1; | |
1008 | ||
69aad6f1 | 1009 | evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int)); |
4af4c955 DA |
1010 | |
1011 | if (evsel->fd) { | |
18ef15c6 | 1012 | int cpu, thread; |
4af4c955 DA |
1013 | for (cpu = 0; cpu < ncpus; cpu++) { |
1014 | for (thread = 0; thread < nthreads; thread++) { | |
1015 | FD(evsel, cpu, thread) = -1; | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | ||
69aad6f1 ACM |
1020 | return evsel->fd != NULL ? 0 : -ENOMEM; |
1021 | } | |
1022 | ||
e2407bef AK |
1023 | static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads, |
1024 | int ioc, void *arg) | |
745cefc5 ACM |
1025 | { |
1026 | int cpu, thread; | |
1027 | ||
bf8e8f4b AH |
1028 | if (evsel->system_wide) |
1029 | nthreads = 1; | |
1030 | ||
745cefc5 ACM |
1031 | for (cpu = 0; cpu < ncpus; cpu++) { |
1032 | for (thread = 0; thread < nthreads; thread++) { | |
1033 | int fd = FD(evsel, cpu, thread), | |
e2407bef | 1034 | err = ioctl(fd, ioc, arg); |
745cefc5 ACM |
1035 | |
1036 | if (err) | |
1037 | return err; | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | return 0; | |
1042 | } | |
1043 | ||
f47805a2 ACM |
1044 | int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads, |
1045 | const char *filter) | |
e2407bef AK |
1046 | { |
1047 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
1048 | PERF_EVENT_IOC_SET_FILTER, | |
1049 | (void *)filter); | |
1050 | } | |
1051 | ||
12467ae4 ACM |
1052 | int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter) |
1053 | { | |
1054 | char *new_filter = strdup(filter); | |
1055 | ||
1056 | if (new_filter != NULL) { | |
1057 | free(evsel->filter); | |
1058 | evsel->filter = new_filter; | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | return -1; | |
1063 | } | |
1064 | ||
3541c034 MP |
1065 | static int perf_evsel__append_filter(struct perf_evsel *evsel, |
1066 | const char *fmt, const char *filter) | |
64ec84f5 ACM |
1067 | { |
1068 | char *new_filter; | |
1069 | ||
1070 | if (evsel->filter == NULL) | |
1071 | return perf_evsel__set_filter(evsel, filter); | |
1072 | ||
b15d0a4c | 1073 | if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) { |
64ec84f5 ACM |
1074 | free(evsel->filter); |
1075 | evsel->filter = new_filter; | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | return -1; | |
1080 | } | |
1081 | ||
3541c034 MP |
1082 | int perf_evsel__append_tp_filter(struct perf_evsel *evsel, const char *filter) |
1083 | { | |
1084 | return perf_evsel__append_filter(evsel, "(%s) && (%s)", filter); | |
1085 | } | |
1086 | ||
1e857484 MP |
1087 | int perf_evsel__append_addr_filter(struct perf_evsel *evsel, const char *filter) |
1088 | { | |
1089 | return perf_evsel__append_filter(evsel, "%s,%s", filter); | |
1090 | } | |
1091 | ||
5cd95fc3 | 1092 | int perf_evsel__enable(struct perf_evsel *evsel) |
e2407bef | 1093 | { |
5cd95fc3 JO |
1094 | int nthreads = thread_map__nr(evsel->threads); |
1095 | int ncpus = cpu_map__nr(evsel->cpus); | |
1096 | ||
e2407bef AK |
1097 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, |
1098 | PERF_EVENT_IOC_ENABLE, | |
1099 | 0); | |
1100 | } | |
1101 | ||
e98a4cbb JO |
1102 | int perf_evsel__disable(struct perf_evsel *evsel) |
1103 | { | |
1104 | int nthreads = thread_map__nr(evsel->threads); | |
1105 | int ncpus = cpu_map__nr(evsel->cpus); | |
1106 | ||
1107 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
1108 | PERF_EVENT_IOC_DISABLE, | |
1109 | 0); | |
1110 | } | |
1111 | ||
70db7533 ACM |
1112 | int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |
1113 | { | |
8d9cbd8f VG |
1114 | if (ncpus == 0 || nthreads == 0) |
1115 | return 0; | |
1116 | ||
bf8e8f4b AH |
1117 | if (evsel->system_wide) |
1118 | nthreads = 1; | |
1119 | ||
a91e5431 ACM |
1120 | evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id)); |
1121 | if (evsel->sample_id == NULL) | |
1122 | return -ENOMEM; | |
1123 | ||
1124 | evsel->id = zalloc(ncpus * nthreads * sizeof(u64)); | |
1125 | if (evsel->id == NULL) { | |
1126 | xyarray__delete(evsel->sample_id); | |
1127 | evsel->sample_id = NULL; | |
1128 | return -ENOMEM; | |
1129 | } | |
1130 | ||
1131 | return 0; | |
70db7533 ACM |
1132 | } |
1133 | ||
8885846f | 1134 | static void perf_evsel__free_fd(struct perf_evsel *evsel) |
69aad6f1 ACM |
1135 | { |
1136 | xyarray__delete(evsel->fd); | |
1137 | evsel->fd = NULL; | |
1138 | } | |
1139 | ||
8885846f | 1140 | static void perf_evsel__free_id(struct perf_evsel *evsel) |
70db7533 | 1141 | { |
a91e5431 ACM |
1142 | xyarray__delete(evsel->sample_id); |
1143 | evsel->sample_id = NULL; | |
04662523 | 1144 | zfree(&evsel->id); |
70db7533 ACM |
1145 | } |
1146 | ||
930a2e29 JO |
1147 | static void perf_evsel__free_config_terms(struct perf_evsel *evsel) |
1148 | { | |
1149 | struct perf_evsel_config_term *term, *h; | |
1150 | ||
1151 | list_for_each_entry_safe(term, h, &evsel->config_terms, list) { | |
1152 | list_del(&term->list); | |
1153 | free(term); | |
1154 | } | |
1155 | } | |
1156 | ||
c52b12ed ACM |
1157 | void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
1158 | { | |
1159 | int cpu, thread; | |
1160 | ||
bf8e8f4b AH |
1161 | if (evsel->system_wide) |
1162 | nthreads = 1; | |
1163 | ||
c52b12ed ACM |
1164 | for (cpu = 0; cpu < ncpus; cpu++) |
1165 | for (thread = 0; thread < nthreads; ++thread) { | |
1166 | close(FD(evsel, cpu, thread)); | |
1167 | FD(evsel, cpu, thread) = -1; | |
1168 | } | |
1169 | } | |
1170 | ||
ef1d1af2 | 1171 | void perf_evsel__exit(struct perf_evsel *evsel) |
69aad6f1 ACM |
1172 | { |
1173 | assert(list_empty(&evsel->node)); | |
d49e4695 | 1174 | assert(evsel->evlist == NULL); |
736b05a0 NK |
1175 | perf_evsel__free_fd(evsel); |
1176 | perf_evsel__free_id(evsel); | |
930a2e29 | 1177 | perf_evsel__free_config_terms(evsel); |
597e48c1 | 1178 | close_cgroup(evsel->cgrp); |
f30a79b0 | 1179 | cpu_map__put(evsel->cpus); |
fce4d296 | 1180 | cpu_map__put(evsel->own_cpus); |
578e91ec | 1181 | thread_map__put(evsel->threads); |
597e48c1 | 1182 | zfree(&evsel->group_name); |
597e48c1 | 1183 | zfree(&evsel->name); |
ce8ccff5 | 1184 | perf_evsel__object.fini(evsel); |
ef1d1af2 ACM |
1185 | } |
1186 | ||
1187 | void perf_evsel__delete(struct perf_evsel *evsel) | |
1188 | { | |
1189 | perf_evsel__exit(evsel); | |
69aad6f1 ACM |
1190 | free(evsel); |
1191 | } | |
c52b12ed | 1192 | |
a6fa0038 | 1193 | void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread, |
857a94a2 | 1194 | struct perf_counts_values *count) |
c7a79c47 SE |
1195 | { |
1196 | struct perf_counts_values tmp; | |
1197 | ||
1198 | if (!evsel->prev_raw_counts) | |
1199 | return; | |
1200 | ||
1201 | if (cpu == -1) { | |
1202 | tmp = evsel->prev_raw_counts->aggr; | |
1203 | evsel->prev_raw_counts->aggr = *count; | |
1204 | } else { | |
a6fa0038 JO |
1205 | tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread); |
1206 | *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count; | |
c7a79c47 SE |
1207 | } |
1208 | ||
1209 | count->val = count->val - tmp.val; | |
1210 | count->ena = count->ena - tmp.ena; | |
1211 | count->run = count->run - tmp.run; | |
1212 | } | |
1213 | ||
13112bbf JO |
1214 | void perf_counts_values__scale(struct perf_counts_values *count, |
1215 | bool scale, s8 *pscaled) | |
1216 | { | |
1217 | s8 scaled = 0; | |
1218 | ||
1219 | if (scale) { | |
1220 | if (count->run == 0) { | |
1221 | scaled = -1; | |
1222 | count->val = 0; | |
1223 | } else if (count->run < count->ena) { | |
1224 | scaled = 1; | |
1225 | count->val = (u64)((double) count->val * count->ena / count->run + 0.5); | |
1226 | } | |
1227 | } else | |
1228 | count->ena = count->run = 0; | |
1229 | ||
1230 | if (pscaled) | |
1231 | *pscaled = scaled; | |
1232 | } | |
1233 | ||
f99f4719 JO |
1234 | int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, |
1235 | struct perf_counts_values *count) | |
1236 | { | |
1237 | memset(count, 0, sizeof(*count)); | |
1238 | ||
1239 | if (FD(evsel, cpu, thread) < 0) | |
1240 | return -EINVAL; | |
1241 | ||
1242 | if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0) | |
1243 | return -errno; | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
c52b12ed ACM |
1248 | int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, |
1249 | int cpu, int thread, bool scale) | |
1250 | { | |
1251 | struct perf_counts_values count; | |
1252 | size_t nv = scale ? 3 : 1; | |
1253 | ||
1254 | if (FD(evsel, cpu, thread) < 0) | |
1255 | return -EINVAL; | |
1256 | ||
a6fa0038 | 1257 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0) |
4eed11d5 ACM |
1258 | return -ENOMEM; |
1259 | ||
c52b12ed ACM |
1260 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) |
1261 | return -errno; | |
1262 | ||
a6fa0038 | 1263 | perf_evsel__compute_deltas(evsel, cpu, thread, &count); |
13112bbf | 1264 | perf_counts_values__scale(&count, scale, NULL); |
a6fa0038 | 1265 | *perf_counts(evsel->counts, cpu, thread) = count; |
c52b12ed ACM |
1266 | return 0; |
1267 | } | |
1268 | ||
6a4bb04c JO |
1269 | static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread) |
1270 | { | |
1271 | struct perf_evsel *leader = evsel->leader; | |
1272 | int fd; | |
1273 | ||
823254ed | 1274 | if (perf_evsel__is_group_leader(evsel)) |
6a4bb04c JO |
1275 | return -1; |
1276 | ||
1277 | /* | |
1278 | * Leader must be already processed/open, | |
1279 | * if not it's a bug. | |
1280 | */ | |
1281 | BUG_ON(!leader->fd); | |
1282 | ||
1283 | fd = FD(leader, cpu, thread); | |
1284 | BUG_ON(fd == -1); | |
1285 | ||
1286 | return fd; | |
1287 | } | |
1288 | ||
2c5e8c52 PZ |
1289 | struct bit_names { |
1290 | int bit; | |
1291 | const char *name; | |
1292 | }; | |
1293 | ||
1294 | static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits) | |
1295 | { | |
1296 | bool first_bit = true; | |
1297 | int i = 0; | |
1298 | ||
1299 | do { | |
1300 | if (value & bits[i].bit) { | |
1301 | buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name); | |
1302 | first_bit = false; | |
1303 | } | |
1304 | } while (bits[++i].name != NULL); | |
1305 | } | |
1306 | ||
1307 | static void __p_sample_type(char *buf, size_t size, u64 value) | |
1308 | { | |
1309 | #define bit_name(n) { PERF_SAMPLE_##n, #n } | |
1310 | struct bit_names bits[] = { | |
1311 | bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR), | |
1312 | bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU), | |
1313 | bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW), | |
1314 | bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER), | |
84422592 | 1315 | bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC), |
dcdd184b | 1316 | bit_name(WEIGHT), |
2c5e8c52 PZ |
1317 | { .name = NULL, } |
1318 | }; | |
1319 | #undef bit_name | |
1320 | __p_bits(buf, size, value, bits); | |
1321 | } | |
1322 | ||
a213b92e ACM |
1323 | static void __p_branch_sample_type(char *buf, size_t size, u64 value) |
1324 | { | |
1325 | #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n } | |
1326 | struct bit_names bits[] = { | |
1327 | bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY), | |
1328 | bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL), | |
1329 | bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX), | |
1330 | bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP), | |
1331 | bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES), | |
1332 | { .name = NULL, } | |
1333 | }; | |
1334 | #undef bit_name | |
1335 | __p_bits(buf, size, value, bits); | |
1336 | } | |
1337 | ||
2c5e8c52 PZ |
1338 | static void __p_read_format(char *buf, size_t size, u64 value) |
1339 | { | |
1340 | #define bit_name(n) { PERF_FORMAT_##n, #n } | |
1341 | struct bit_names bits[] = { | |
1342 | bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING), | |
1343 | bit_name(ID), bit_name(GROUP), | |
1344 | { .name = NULL, } | |
1345 | }; | |
1346 | #undef bit_name | |
1347 | __p_bits(buf, size, value, bits); | |
1348 | } | |
1349 | ||
1350 | #define BUF_SIZE 1024 | |
1351 | ||
7310aed7 | 1352 | #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val)) |
2c5e8c52 PZ |
1353 | #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val)) |
1354 | #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val)) | |
1355 | #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val) | |
a213b92e | 1356 | #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val) |
2c5e8c52 PZ |
1357 | #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val) |
1358 | ||
1359 | #define PRINT_ATTRn(_n, _f, _p) \ | |
1360 | do { \ | |
1361 | if (attr->_f) { \ | |
1362 | _p(attr->_f); \ | |
1363 | ret += attr__fprintf(fp, _n, buf, priv);\ | |
1364 | } \ | |
1365 | } while (0) | |
1366 | ||
1367 | #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p) | |
1368 | ||
1369 | int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr, | |
1370 | attr__fprintf_f attr__fprintf, void *priv) | |
1371 | { | |
1372 | char buf[BUF_SIZE]; | |
1373 | int ret = 0; | |
1374 | ||
1375 | PRINT_ATTRf(type, p_unsigned); | |
1376 | PRINT_ATTRf(size, p_unsigned); | |
1377 | PRINT_ATTRf(config, p_hex); | |
1378 | PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned); | |
1379 | PRINT_ATTRf(sample_type, p_sample_type); | |
1380 | PRINT_ATTRf(read_format, p_read_format); | |
1381 | ||
1382 | PRINT_ATTRf(disabled, p_unsigned); | |
1383 | PRINT_ATTRf(inherit, p_unsigned); | |
1384 | PRINT_ATTRf(pinned, p_unsigned); | |
1385 | PRINT_ATTRf(exclusive, p_unsigned); | |
1386 | PRINT_ATTRf(exclude_user, p_unsigned); | |
1387 | PRINT_ATTRf(exclude_kernel, p_unsigned); | |
1388 | PRINT_ATTRf(exclude_hv, p_unsigned); | |
1389 | PRINT_ATTRf(exclude_idle, p_unsigned); | |
1390 | PRINT_ATTRf(mmap, p_unsigned); | |
1391 | PRINT_ATTRf(comm, p_unsigned); | |
1392 | PRINT_ATTRf(freq, p_unsigned); | |
1393 | PRINT_ATTRf(inherit_stat, p_unsigned); | |
1394 | PRINT_ATTRf(enable_on_exec, p_unsigned); | |
1395 | PRINT_ATTRf(task, p_unsigned); | |
1396 | PRINT_ATTRf(watermark, p_unsigned); | |
1397 | PRINT_ATTRf(precise_ip, p_unsigned); | |
1398 | PRINT_ATTRf(mmap_data, p_unsigned); | |
1399 | PRINT_ATTRf(sample_id_all, p_unsigned); | |
1400 | PRINT_ATTRf(exclude_host, p_unsigned); | |
1401 | PRINT_ATTRf(exclude_guest, p_unsigned); | |
1402 | PRINT_ATTRf(exclude_callchain_kernel, p_unsigned); | |
1403 | PRINT_ATTRf(exclude_callchain_user, p_unsigned); | |
1404 | PRINT_ATTRf(mmap2, p_unsigned); | |
1405 | PRINT_ATTRf(comm_exec, p_unsigned); | |
1406 | PRINT_ATTRf(use_clockid, p_unsigned); | |
0286039f | 1407 | PRINT_ATTRf(context_switch, p_unsigned); |
0a241ef4 | 1408 | PRINT_ATTRf(write_backward, p_unsigned); |
2c5e8c52 PZ |
1409 | |
1410 | PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned); | |
1411 | PRINT_ATTRf(bp_type, p_unsigned); | |
1412 | PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex); | |
1413 | PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex); | |
a213b92e | 1414 | PRINT_ATTRf(branch_sample_type, p_branch_sample_type); |
2c5e8c52 PZ |
1415 | PRINT_ATTRf(sample_regs_user, p_hex); |
1416 | PRINT_ATTRf(sample_stack_user, p_unsigned); | |
1417 | PRINT_ATTRf(clockid, p_signed); | |
1418 | PRINT_ATTRf(sample_regs_intr, p_hex); | |
70d73de4 | 1419 | PRINT_ATTRf(aux_watermark, p_unsigned); |
792d48b4 | 1420 | PRINT_ATTRf(sample_max_stack, p_unsigned); |
e3e1a54f AH |
1421 | |
1422 | return ret; | |
1423 | } | |
1424 | ||
2c5e8c52 PZ |
1425 | static int __open_attr__fprintf(FILE *fp, const char *name, const char *val, |
1426 | void *priv __attribute__((unused))) | |
1427 | { | |
1428 | return fprintf(fp, " %-32s %s\n", name, val); | |
1429 | } | |
1430 | ||
a359c17a JO |
1431 | static bool ignore_missing_thread(struct perf_evsel *evsel, |
1432 | struct thread_map *threads, | |
1433 | int thread, int err) | |
1434 | { | |
1435 | if (!evsel->ignore_missing_thread) | |
1436 | return false; | |
1437 | ||
1438 | /* The system wide setup does not work with threads. */ | |
1439 | if (evsel->system_wide) | |
1440 | return false; | |
1441 | ||
1442 | /* The -ESRCH is perf event syscall errno for pid's not found. */ | |
1443 | if (err != -ESRCH) | |
1444 | return false; | |
1445 | ||
1446 | /* If there's only one thread, let it fail. */ | |
1447 | if (threads->nr == 1) | |
1448 | return false; | |
1449 | ||
1450 | if (thread_map__remove(threads, thread)) | |
1451 | return false; | |
1452 | ||
1453 | pr_warning("WARNING: Ignored open failure for pid %d\n", | |
1454 | thread_map__pid(threads, thread)); | |
1455 | return true; | |
1456 | } | |
1457 | ||
c24ae6d9 ACM |
1458 | int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
1459 | struct thread_map *threads) | |
48290609 | 1460 | { |
bf8e8f4b | 1461 | int cpu, thread, nthreads; |
57480d2c | 1462 | unsigned long flags = PERF_FLAG_FD_CLOEXEC; |
727ab04e | 1463 | int pid = -1, err; |
bec19672 | 1464 | enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE; |
48290609 | 1465 | |
32a951b4 ACM |
1466 | if (perf_missing_features.write_backward && evsel->attr.write_backward) |
1467 | return -EINVAL; | |
1468 | ||
c24ae6d9 ACM |
1469 | if (cpus == NULL) { |
1470 | static struct cpu_map *empty_cpu_map; | |
1471 | ||
1472 | if (empty_cpu_map == NULL) { | |
1473 | empty_cpu_map = cpu_map__dummy_new(); | |
1474 | if (empty_cpu_map == NULL) | |
1475 | return -ENOMEM; | |
1476 | } | |
1477 | ||
1478 | cpus = empty_cpu_map; | |
1479 | } | |
1480 | ||
1481 | if (threads == NULL) { | |
1482 | static struct thread_map *empty_thread_map; | |
1483 | ||
1484 | if (empty_thread_map == NULL) { | |
1485 | empty_thread_map = thread_map__new_by_tid(-1); | |
1486 | if (empty_thread_map == NULL) | |
1487 | return -ENOMEM; | |
1488 | } | |
1489 | ||
1490 | threads = empty_thread_map; | |
1491 | } | |
1492 | ||
bf8e8f4b AH |
1493 | if (evsel->system_wide) |
1494 | nthreads = 1; | |
1495 | else | |
1496 | nthreads = threads->nr; | |
1497 | ||
0252208e | 1498 | if (evsel->fd == NULL && |
bf8e8f4b | 1499 | perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0) |
727ab04e | 1500 | return -ENOMEM; |
4eed11d5 | 1501 | |
023695d9 | 1502 | if (evsel->cgrp) { |
57480d2c | 1503 | flags |= PERF_FLAG_PID_CGROUP; |
023695d9 SE |
1504 | pid = evsel->cgrp->fd; |
1505 | } | |
1506 | ||
594ac61a | 1507 | fallback_missing_features: |
814c8c38 PZ |
1508 | if (perf_missing_features.clockid_wrong) |
1509 | evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */ | |
1510 | if (perf_missing_features.clockid) { | |
1511 | evsel->attr.use_clockid = 0; | |
1512 | evsel->attr.clockid = 0; | |
1513 | } | |
57480d2c YD |
1514 | if (perf_missing_features.cloexec) |
1515 | flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; | |
5c5e854b SE |
1516 | if (perf_missing_features.mmap2) |
1517 | evsel->attr.mmap2 = 0; | |
594ac61a ACM |
1518 | if (perf_missing_features.exclude_guest) |
1519 | evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; | |
bd0f8895 AK |
1520 | if (perf_missing_features.lbr_flags) |
1521 | evsel->attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS | | |
1522 | PERF_SAMPLE_BRANCH_NO_CYCLES); | |
594ac61a ACM |
1523 | retry_sample_id: |
1524 | if (perf_missing_features.sample_id_all) | |
1525 | evsel->attr.sample_id_all = 0; | |
1526 | ||
2c5e8c52 PZ |
1527 | if (verbose >= 2) { |
1528 | fprintf(stderr, "%.60s\n", graph_dotted_line); | |
1529 | fprintf(stderr, "perf_event_attr:\n"); | |
1530 | perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL); | |
1531 | fprintf(stderr, "%.60s\n", graph_dotted_line); | |
1532 | } | |
e3e1a54f | 1533 | |
86bd5e86 | 1534 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
9d04f178 | 1535 | |
bf8e8f4b | 1536 | for (thread = 0; thread < nthreads; thread++) { |
83c2e4f3 | 1537 | int fd, group_fd; |
023695d9 | 1538 | |
bf8e8f4b | 1539 | if (!evsel->cgrp && !evsel->system_wide) |
e13798c7 | 1540 | pid = thread_map__pid(threads, thread); |
023695d9 | 1541 | |
6a4bb04c | 1542 | group_fd = get_group_fd(evsel, cpu, thread); |
bec19672 | 1543 | retry_open: |
7b4b82bc | 1544 | pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx", |
e3e1a54f AH |
1545 | pid, cpus->map[cpu], group_fd, flags); |
1546 | ||
83c2e4f3 JO |
1547 | fd = sys_perf_event_open(&evsel->attr, pid, cpus->map[cpu], |
1548 | group_fd, flags); | |
1549 | ||
1550 | FD(evsel, cpu, thread) = fd; | |
1551 | ||
1552 | if (fd < 0) { | |
727ab04e | 1553 | err = -errno; |
a359c17a JO |
1554 | |
1555 | if (ignore_missing_thread(evsel, threads, thread, err)) { | |
1556 | /* | |
1557 | * We just removed 1 thread, so take a step | |
1558 | * back on thread index and lower the upper | |
1559 | * nthreads limit. | |
1560 | */ | |
1561 | nthreads--; | |
1562 | thread--; | |
1563 | ||
1564 | /* ... and pretend like nothing have happened. */ | |
1565 | err = 0; | |
1566 | continue; | |
1567 | } | |
1568 | ||
7b4b82bc | 1569 | pr_debug2("\nsys_perf_event_open failed, error %d\n", |
f852fd62 | 1570 | err); |
594ac61a | 1571 | goto try_fallback; |
727ab04e | 1572 | } |
1f45b1d4 | 1573 | |
83c2e4f3 | 1574 | pr_debug2(" = %d\n", fd); |
7b4b82bc | 1575 | |
1f45b1d4 | 1576 | if (evsel->bpf_fd >= 0) { |
83c2e4f3 | 1577 | int evt_fd = fd; |
1f45b1d4 WN |
1578 | int bpf_fd = evsel->bpf_fd; |
1579 | ||
1580 | err = ioctl(evt_fd, | |
1581 | PERF_EVENT_IOC_SET_BPF, | |
1582 | bpf_fd); | |
1583 | if (err && errno != EEXIST) { | |
1584 | pr_err("failed to attach bpf fd %d: %s\n", | |
1585 | bpf_fd, strerror(errno)); | |
1586 | err = -EINVAL; | |
1587 | goto out_close; | |
1588 | } | |
1589 | } | |
1590 | ||
bec19672 | 1591 | set_rlimit = NO_CHANGE; |
814c8c38 PZ |
1592 | |
1593 | /* | |
1594 | * If we succeeded but had to kill clockid, fail and | |
1595 | * have perf_evsel__open_strerror() print us a nice | |
1596 | * error. | |
1597 | */ | |
1598 | if (perf_missing_features.clockid || | |
1599 | perf_missing_features.clockid_wrong) { | |
1600 | err = -EINVAL; | |
1601 | goto out_close; | |
1602 | } | |
0252208e | 1603 | } |
48290609 ACM |
1604 | } |
1605 | ||
1606 | return 0; | |
1607 | ||
594ac61a | 1608 | try_fallback: |
bec19672 AK |
1609 | /* |
1610 | * perf stat needs between 5 and 22 fds per CPU. When we run out | |
1611 | * of them try to increase the limits. | |
1612 | */ | |
1613 | if (err == -EMFILE && set_rlimit < INCREASED_MAX) { | |
1614 | struct rlimit l; | |
1615 | int old_errno = errno; | |
1616 | ||
1617 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1618 | if (set_rlimit == NO_CHANGE) | |
1619 | l.rlim_cur = l.rlim_max; | |
1620 | else { | |
1621 | l.rlim_cur = l.rlim_max + 1000; | |
1622 | l.rlim_max = l.rlim_cur; | |
1623 | } | |
1624 | if (setrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1625 | set_rlimit++; | |
1626 | errno = old_errno; | |
1627 | goto retry_open; | |
1628 | } | |
1629 | } | |
1630 | errno = old_errno; | |
1631 | } | |
1632 | ||
594ac61a ACM |
1633 | if (err != -EINVAL || cpu > 0 || thread > 0) |
1634 | goto out_close; | |
1635 | ||
814c8c38 PZ |
1636 | /* |
1637 | * Must probe features in the order they were added to the | |
1638 | * perf_event_attr interface. | |
1639 | */ | |
7da36e94 ACM |
1640 | if (!perf_missing_features.write_backward && evsel->attr.write_backward) { |
1641 | perf_missing_features.write_backward = true; | |
32a951b4 | 1642 | goto out_close; |
7da36e94 | 1643 | } else if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) { |
814c8c38 PZ |
1644 | perf_missing_features.clockid_wrong = true; |
1645 | goto fallback_missing_features; | |
1646 | } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) { | |
1647 | perf_missing_features.clockid = true; | |
1648 | goto fallback_missing_features; | |
1649 | } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) { | |
57480d2c YD |
1650 | perf_missing_features.cloexec = true; |
1651 | goto fallback_missing_features; | |
1652 | } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) { | |
5c5e854b SE |
1653 | perf_missing_features.mmap2 = true; |
1654 | goto fallback_missing_features; | |
1655 | } else if (!perf_missing_features.exclude_guest && | |
1656 | (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { | |
594ac61a ACM |
1657 | perf_missing_features.exclude_guest = true; |
1658 | goto fallback_missing_features; | |
1659 | } else if (!perf_missing_features.sample_id_all) { | |
1660 | perf_missing_features.sample_id_all = true; | |
1661 | goto retry_sample_id; | |
bd0f8895 AK |
1662 | } else if (!perf_missing_features.lbr_flags && |
1663 | (evsel->attr.branch_sample_type & | |
1664 | (PERF_SAMPLE_BRANCH_NO_CYCLES | | |
1665 | PERF_SAMPLE_BRANCH_NO_FLAGS))) { | |
1666 | perf_missing_features.lbr_flags = true; | |
1667 | goto fallback_missing_features; | |
594ac61a | 1668 | } |
48290609 | 1669 | out_close: |
0252208e ACM |
1670 | do { |
1671 | while (--thread >= 0) { | |
1672 | close(FD(evsel, cpu, thread)); | |
1673 | FD(evsel, cpu, thread) = -1; | |
1674 | } | |
bf8e8f4b | 1675 | thread = nthreads; |
0252208e | 1676 | } while (--cpu >= 0); |
727ab04e ACM |
1677 | return err; |
1678 | } | |
1679 | ||
1680 | void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads) | |
1681 | { | |
1682 | if (evsel->fd == NULL) | |
1683 | return; | |
1684 | ||
1685 | perf_evsel__close_fd(evsel, ncpus, nthreads); | |
1686 | perf_evsel__free_fd(evsel); | |
48290609 ACM |
1687 | } |
1688 | ||
f08199d3 | 1689 | int perf_evsel__open_per_cpu(struct perf_evsel *evsel, |
6a4bb04c | 1690 | struct cpu_map *cpus) |
48290609 | 1691 | { |
c24ae6d9 | 1692 | return perf_evsel__open(evsel, cpus, NULL); |
0252208e | 1693 | } |
48290609 | 1694 | |
f08199d3 | 1695 | int perf_evsel__open_per_thread(struct perf_evsel *evsel, |
6a4bb04c | 1696 | struct thread_map *threads) |
0252208e | 1697 | { |
c24ae6d9 | 1698 | return perf_evsel__open(evsel, NULL, threads); |
48290609 | 1699 | } |
70082dd9 | 1700 | |
0807d2d8 ACM |
1701 | static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel, |
1702 | const union perf_event *event, | |
1703 | struct perf_sample *sample) | |
d0dd74e8 | 1704 | { |
0807d2d8 | 1705 | u64 type = evsel->attr.sample_type; |
d0dd74e8 | 1706 | const u64 *array = event->sample.array; |
0807d2d8 | 1707 | bool swapped = evsel->needs_swap; |
37073f9e | 1708 | union u64_swap u; |
d0dd74e8 ACM |
1709 | |
1710 | array += ((event->header.size - | |
1711 | sizeof(event->header)) / sizeof(u64)) - 1; | |
1712 | ||
75562573 AH |
1713 | if (type & PERF_SAMPLE_IDENTIFIER) { |
1714 | sample->id = *array; | |
1715 | array--; | |
1716 | } | |
1717 | ||
d0dd74e8 | 1718 | if (type & PERF_SAMPLE_CPU) { |
37073f9e JO |
1719 | u.val64 = *array; |
1720 | if (swapped) { | |
1721 | /* undo swap of u64, then swap on individual u32s */ | |
1722 | u.val64 = bswap_64(u.val64); | |
1723 | u.val32[0] = bswap_32(u.val32[0]); | |
1724 | } | |
1725 | ||
1726 | sample->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1727 | array--; |
1728 | } | |
1729 | ||
1730 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1731 | sample->stream_id = *array; | |
1732 | array--; | |
1733 | } | |
1734 | ||
1735 | if (type & PERF_SAMPLE_ID) { | |
1736 | sample->id = *array; | |
1737 | array--; | |
1738 | } | |
1739 | ||
1740 | if (type & PERF_SAMPLE_TIME) { | |
1741 | sample->time = *array; | |
1742 | array--; | |
1743 | } | |
1744 | ||
1745 | if (type & PERF_SAMPLE_TID) { | |
37073f9e JO |
1746 | u.val64 = *array; |
1747 | if (swapped) { | |
1748 | /* undo swap of u64, then swap on individual u32s */ | |
1749 | u.val64 = bswap_64(u.val64); | |
1750 | u.val32[0] = bswap_32(u.val32[0]); | |
1751 | u.val32[1] = bswap_32(u.val32[1]); | |
1752 | } | |
1753 | ||
1754 | sample->pid = u.val32[0]; | |
1755 | sample->tid = u.val32[1]; | |
dd44bc6b | 1756 | array--; |
d0dd74e8 ACM |
1757 | } |
1758 | ||
1759 | return 0; | |
1760 | } | |
1761 | ||
03b6ea9b AH |
1762 | static inline bool overflow(const void *endp, u16 max_size, const void *offset, |
1763 | u64 size) | |
98e1da90 | 1764 | { |
03b6ea9b AH |
1765 | return size > max_size || offset + size > endp; |
1766 | } | |
98e1da90 | 1767 | |
03b6ea9b AH |
1768 | #define OVERFLOW_CHECK(offset, size, max_size) \ |
1769 | do { \ | |
1770 | if (overflow(endp, (max_size), (offset), (size))) \ | |
1771 | return -EFAULT; \ | |
1772 | } while (0) | |
98e1da90 | 1773 | |
03b6ea9b AH |
1774 | #define OVERFLOW_CHECK_u64(offset) \ |
1775 | OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64)) | |
98e1da90 | 1776 | |
a3f698fe | 1777 | int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, |
0807d2d8 | 1778 | struct perf_sample *data) |
d0dd74e8 | 1779 | { |
a3f698fe | 1780 | u64 type = evsel->attr.sample_type; |
0807d2d8 | 1781 | bool swapped = evsel->needs_swap; |
d0dd74e8 | 1782 | const u64 *array; |
03b6ea9b AH |
1783 | u16 max_size = event->header.size; |
1784 | const void *endp = (void *)event + max_size; | |
1785 | u64 sz; | |
d0dd74e8 | 1786 | |
936be503 DA |
1787 | /* |
1788 | * used for cross-endian analysis. See git commit 65014ab3 | |
1789 | * for why this goofiness is needed. | |
1790 | */ | |
6a11f92e | 1791 | union u64_swap u; |
936be503 | 1792 | |
f3bda2c9 | 1793 | memset(data, 0, sizeof(*data)); |
d0dd74e8 ACM |
1794 | data->cpu = data->pid = data->tid = -1; |
1795 | data->stream_id = data->id = data->time = -1ULL; | |
bc529086 | 1796 | data->period = evsel->attr.sample_period; |
473398a2 | 1797 | data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
d0dd74e8 ACM |
1798 | |
1799 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
a3f698fe | 1800 | if (!evsel->attr.sample_id_all) |
d0dd74e8 | 1801 | return 0; |
0807d2d8 | 1802 | return perf_evsel__parse_id_sample(evsel, event, data); |
d0dd74e8 ACM |
1803 | } |
1804 | ||
1805 | array = event->sample.array; | |
1806 | ||
03b6ea9b AH |
1807 | /* |
1808 | * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes | |
1809 | * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to | |
1810 | * check the format does not go past the end of the event. | |
1811 | */ | |
a3f698fe | 1812 | if (evsel->sample_size + sizeof(event->header) > event->header.size) |
a2854124 FW |
1813 | return -EFAULT; |
1814 | ||
75562573 AH |
1815 | data->id = -1ULL; |
1816 | if (type & PERF_SAMPLE_IDENTIFIER) { | |
1817 | data->id = *array; | |
1818 | array++; | |
1819 | } | |
1820 | ||
d0dd74e8 | 1821 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 1822 | data->ip = *array; |
d0dd74e8 ACM |
1823 | array++; |
1824 | } | |
1825 | ||
1826 | if (type & PERF_SAMPLE_TID) { | |
936be503 DA |
1827 | u.val64 = *array; |
1828 | if (swapped) { | |
1829 | /* undo swap of u64, then swap on individual u32s */ | |
1830 | u.val64 = bswap_64(u.val64); | |
1831 | u.val32[0] = bswap_32(u.val32[0]); | |
1832 | u.val32[1] = bswap_32(u.val32[1]); | |
1833 | } | |
1834 | ||
1835 | data->pid = u.val32[0]; | |
1836 | data->tid = u.val32[1]; | |
d0dd74e8 ACM |
1837 | array++; |
1838 | } | |
1839 | ||
1840 | if (type & PERF_SAMPLE_TIME) { | |
1841 | data->time = *array; | |
1842 | array++; | |
1843 | } | |
1844 | ||
7cec0922 | 1845 | data->addr = 0; |
d0dd74e8 ACM |
1846 | if (type & PERF_SAMPLE_ADDR) { |
1847 | data->addr = *array; | |
1848 | array++; | |
1849 | } | |
1850 | ||
d0dd74e8 ACM |
1851 | if (type & PERF_SAMPLE_ID) { |
1852 | data->id = *array; | |
1853 | array++; | |
1854 | } | |
1855 | ||
1856 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1857 | data->stream_id = *array; | |
1858 | array++; | |
1859 | } | |
1860 | ||
1861 | if (type & PERF_SAMPLE_CPU) { | |
936be503 DA |
1862 | |
1863 | u.val64 = *array; | |
1864 | if (swapped) { | |
1865 | /* undo swap of u64, then swap on individual u32s */ | |
1866 | u.val64 = bswap_64(u.val64); | |
1867 | u.val32[0] = bswap_32(u.val32[0]); | |
1868 | } | |
1869 | ||
1870 | data->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1871 | array++; |
1872 | } | |
1873 | ||
1874 | if (type & PERF_SAMPLE_PERIOD) { | |
1875 | data->period = *array; | |
1876 | array++; | |
1877 | } | |
1878 | ||
1879 | if (type & PERF_SAMPLE_READ) { | |
9ede473c JO |
1880 | u64 read_format = evsel->attr.read_format; |
1881 | ||
03b6ea9b | 1882 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1883 | if (read_format & PERF_FORMAT_GROUP) |
1884 | data->read.group.nr = *array; | |
1885 | else | |
1886 | data->read.one.value = *array; | |
1887 | ||
1888 | array++; | |
1889 | ||
1890 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
03b6ea9b | 1891 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1892 | data->read.time_enabled = *array; |
1893 | array++; | |
1894 | } | |
1895 | ||
1896 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
03b6ea9b | 1897 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1898 | data->read.time_running = *array; |
1899 | array++; | |
1900 | } | |
1901 | ||
1902 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1903 | if (read_format & PERF_FORMAT_GROUP) { | |
03b6ea9b AH |
1904 | const u64 max_group_nr = UINT64_MAX / |
1905 | sizeof(struct sample_read_value); | |
1906 | ||
1907 | if (data->read.group.nr > max_group_nr) | |
1908 | return -EFAULT; | |
1909 | sz = data->read.group.nr * | |
1910 | sizeof(struct sample_read_value); | |
1911 | OVERFLOW_CHECK(array, sz, max_size); | |
1912 | data->read.group.values = | |
1913 | (struct sample_read_value *)array; | |
1914 | array = (void *)array + sz; | |
9ede473c | 1915 | } else { |
03b6ea9b | 1916 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1917 | data->read.one.id = *array; |
1918 | array++; | |
1919 | } | |
d0dd74e8 ACM |
1920 | } |
1921 | ||
1922 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
03b6ea9b | 1923 | const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); |
98e1da90 | 1924 | |
03b6ea9b AH |
1925 | OVERFLOW_CHECK_u64(array); |
1926 | data->callchain = (struct ip_callchain *)array++; | |
1927 | if (data->callchain->nr > max_callchain_nr) | |
98e1da90 | 1928 | return -EFAULT; |
03b6ea9b AH |
1929 | sz = data->callchain->nr * sizeof(u64); |
1930 | OVERFLOW_CHECK(array, sz, max_size); | |
1931 | array = (void *)array + sz; | |
d0dd74e8 ACM |
1932 | } |
1933 | ||
1934 | if (type & PERF_SAMPLE_RAW) { | |
03b6ea9b | 1935 | OVERFLOW_CHECK_u64(array); |
936be503 DA |
1936 | u.val64 = *array; |
1937 | if (WARN_ONCE(swapped, | |
1938 | "Endianness of raw data not corrected!\n")) { | |
1939 | /* undo swap of u64, then swap on individual u32s */ | |
1940 | u.val64 = bswap_64(u.val64); | |
1941 | u.val32[0] = bswap_32(u.val32[0]); | |
1942 | u.val32[1] = bswap_32(u.val32[1]); | |
1943 | } | |
936be503 | 1944 | data->raw_size = u.val32[0]; |
03b6ea9b | 1945 | array = (void *)array + sizeof(u32); |
98e1da90 | 1946 | |
03b6ea9b AH |
1947 | OVERFLOW_CHECK(array, data->raw_size, max_size); |
1948 | data->raw_data = (void *)array; | |
1949 | array = (void *)array + data->raw_size; | |
d0dd74e8 ACM |
1950 | } |
1951 | ||
b5387528 | 1952 | if (type & PERF_SAMPLE_BRANCH_STACK) { |
03b6ea9b AH |
1953 | const u64 max_branch_nr = UINT64_MAX / |
1954 | sizeof(struct branch_entry); | |
b5387528 | 1955 | |
03b6ea9b AH |
1956 | OVERFLOW_CHECK_u64(array); |
1957 | data->branch_stack = (struct branch_stack *)array++; | |
b5387528 | 1958 | |
03b6ea9b AH |
1959 | if (data->branch_stack->nr > max_branch_nr) |
1960 | return -EFAULT; | |
b5387528 | 1961 | sz = data->branch_stack->nr * sizeof(struct branch_entry); |
03b6ea9b AH |
1962 | OVERFLOW_CHECK(array, sz, max_size); |
1963 | array = (void *)array + sz; | |
b5387528 | 1964 | } |
0f6a3015 JO |
1965 | |
1966 | if (type & PERF_SAMPLE_REGS_USER) { | |
03b6ea9b | 1967 | OVERFLOW_CHECK_u64(array); |
5b95a4a3 AH |
1968 | data->user_regs.abi = *array; |
1969 | array++; | |
0f6a3015 | 1970 | |
5b95a4a3 | 1971 | if (data->user_regs.abi) { |
352ea45a | 1972 | u64 mask = evsel->attr.sample_regs_user; |
03b6ea9b | 1973 | |
352ea45a | 1974 | sz = hweight_long(mask) * sizeof(u64); |
03b6ea9b | 1975 | OVERFLOW_CHECK(array, sz, max_size); |
352ea45a | 1976 | data->user_regs.mask = mask; |
0f6a3015 | 1977 | data->user_regs.regs = (u64 *)array; |
03b6ea9b | 1978 | array = (void *)array + sz; |
0f6a3015 JO |
1979 | } |
1980 | } | |
1981 | ||
1982 | if (type & PERF_SAMPLE_STACK_USER) { | |
03b6ea9b AH |
1983 | OVERFLOW_CHECK_u64(array); |
1984 | sz = *array++; | |
0f6a3015 JO |
1985 | |
1986 | data->user_stack.offset = ((char *)(array - 1) | |
1987 | - (char *) event); | |
1988 | ||
03b6ea9b | 1989 | if (!sz) { |
0f6a3015 JO |
1990 | data->user_stack.size = 0; |
1991 | } else { | |
03b6ea9b | 1992 | OVERFLOW_CHECK(array, sz, max_size); |
0f6a3015 | 1993 | data->user_stack.data = (char *)array; |
03b6ea9b AH |
1994 | array = (void *)array + sz; |
1995 | OVERFLOW_CHECK_u64(array); | |
54bd2692 | 1996 | data->user_stack.size = *array++; |
a65cb4b9 JO |
1997 | if (WARN_ONCE(data->user_stack.size > sz, |
1998 | "user stack dump failure\n")) | |
1999 | return -EFAULT; | |
0f6a3015 JO |
2000 | } |
2001 | } | |
2002 | ||
05484298 | 2003 | if (type & PERF_SAMPLE_WEIGHT) { |
03b6ea9b | 2004 | OVERFLOW_CHECK_u64(array); |
05484298 AK |
2005 | data->weight = *array; |
2006 | array++; | |
2007 | } | |
2008 | ||
98a3b32c SE |
2009 | data->data_src = PERF_MEM_DATA_SRC_NONE; |
2010 | if (type & PERF_SAMPLE_DATA_SRC) { | |
03b6ea9b | 2011 | OVERFLOW_CHECK_u64(array); |
98a3b32c SE |
2012 | data->data_src = *array; |
2013 | array++; | |
2014 | } | |
2015 | ||
475eeab9 AK |
2016 | data->transaction = 0; |
2017 | if (type & PERF_SAMPLE_TRANSACTION) { | |
87b95524 | 2018 | OVERFLOW_CHECK_u64(array); |
475eeab9 AK |
2019 | data->transaction = *array; |
2020 | array++; | |
2021 | } | |
2022 | ||
6a21c0b5 SE |
2023 | data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE; |
2024 | if (type & PERF_SAMPLE_REGS_INTR) { | |
2025 | OVERFLOW_CHECK_u64(array); | |
2026 | data->intr_regs.abi = *array; | |
2027 | array++; | |
2028 | ||
2029 | if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) { | |
2030 | u64 mask = evsel->attr.sample_regs_intr; | |
2031 | ||
2032 | sz = hweight_long(mask) * sizeof(u64); | |
2033 | OVERFLOW_CHECK(array, sz, max_size); | |
2034 | data->intr_regs.mask = mask; | |
2035 | data->intr_regs.regs = (u64 *)array; | |
2036 | array = (void *)array + sz; | |
2037 | } | |
2038 | } | |
2039 | ||
d0dd74e8 ACM |
2040 | return 0; |
2041 | } | |
74eec26f | 2042 | |
b1cf6f65 | 2043 | size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, |
352ea45a | 2044 | u64 read_format) |
b1cf6f65 AH |
2045 | { |
2046 | size_t sz, result = sizeof(struct sample_event); | |
2047 | ||
2048 | if (type & PERF_SAMPLE_IDENTIFIER) | |
2049 | result += sizeof(u64); | |
2050 | ||
2051 | if (type & PERF_SAMPLE_IP) | |
2052 | result += sizeof(u64); | |
2053 | ||
2054 | if (type & PERF_SAMPLE_TID) | |
2055 | result += sizeof(u64); | |
2056 | ||
2057 | if (type & PERF_SAMPLE_TIME) | |
2058 | result += sizeof(u64); | |
2059 | ||
2060 | if (type & PERF_SAMPLE_ADDR) | |
2061 | result += sizeof(u64); | |
2062 | ||
2063 | if (type & PERF_SAMPLE_ID) | |
2064 | result += sizeof(u64); | |
2065 | ||
2066 | if (type & PERF_SAMPLE_STREAM_ID) | |
2067 | result += sizeof(u64); | |
2068 | ||
2069 | if (type & PERF_SAMPLE_CPU) | |
2070 | result += sizeof(u64); | |
2071 | ||
2072 | if (type & PERF_SAMPLE_PERIOD) | |
2073 | result += sizeof(u64); | |
2074 | ||
2075 | if (type & PERF_SAMPLE_READ) { | |
2076 | result += sizeof(u64); | |
2077 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
2078 | result += sizeof(u64); | |
2079 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
2080 | result += sizeof(u64); | |
2081 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
2082 | if (read_format & PERF_FORMAT_GROUP) { | |
2083 | sz = sample->read.group.nr * | |
2084 | sizeof(struct sample_read_value); | |
2085 | result += sz; | |
2086 | } else { | |
2087 | result += sizeof(u64); | |
2088 | } | |
2089 | } | |
2090 | ||
2091 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
2092 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
2093 | result += sz; | |
2094 | } | |
2095 | ||
2096 | if (type & PERF_SAMPLE_RAW) { | |
2097 | result += sizeof(u32); | |
2098 | result += sample->raw_size; | |
2099 | } | |
2100 | ||
2101 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
2102 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
2103 | sz += sizeof(u64); | |
2104 | result += sz; | |
2105 | } | |
2106 | ||
2107 | if (type & PERF_SAMPLE_REGS_USER) { | |
2108 | if (sample->user_regs.abi) { | |
2109 | result += sizeof(u64); | |
352ea45a | 2110 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
b1cf6f65 AH |
2111 | result += sz; |
2112 | } else { | |
2113 | result += sizeof(u64); | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | if (type & PERF_SAMPLE_STACK_USER) { | |
2118 | sz = sample->user_stack.size; | |
2119 | result += sizeof(u64); | |
2120 | if (sz) { | |
2121 | result += sz; | |
2122 | result += sizeof(u64); | |
2123 | } | |
2124 | } | |
2125 | ||
2126 | if (type & PERF_SAMPLE_WEIGHT) | |
2127 | result += sizeof(u64); | |
2128 | ||
2129 | if (type & PERF_SAMPLE_DATA_SRC) | |
2130 | result += sizeof(u64); | |
2131 | ||
42d88910 AH |
2132 | if (type & PERF_SAMPLE_TRANSACTION) |
2133 | result += sizeof(u64); | |
2134 | ||
6a21c0b5 SE |
2135 | if (type & PERF_SAMPLE_REGS_INTR) { |
2136 | if (sample->intr_regs.abi) { | |
2137 | result += sizeof(u64); | |
2138 | sz = hweight_long(sample->intr_regs.mask) * sizeof(u64); | |
2139 | result += sz; | |
2140 | } else { | |
2141 | result += sizeof(u64); | |
2142 | } | |
2143 | } | |
2144 | ||
b1cf6f65 AH |
2145 | return result; |
2146 | } | |
2147 | ||
74eec26f | 2148 | int perf_event__synthesize_sample(union perf_event *event, u64 type, |
352ea45a | 2149 | u64 read_format, |
74eec26f AV |
2150 | const struct perf_sample *sample, |
2151 | bool swapped) | |
2152 | { | |
2153 | u64 *array; | |
d03f2170 | 2154 | size_t sz; |
74eec26f AV |
2155 | /* |
2156 | * used for cross-endian analysis. See git commit 65014ab3 | |
2157 | * for why this goofiness is needed. | |
2158 | */ | |
6a11f92e | 2159 | union u64_swap u; |
74eec26f AV |
2160 | |
2161 | array = event->sample.array; | |
2162 | ||
75562573 AH |
2163 | if (type & PERF_SAMPLE_IDENTIFIER) { |
2164 | *array = sample->id; | |
2165 | array++; | |
2166 | } | |
2167 | ||
74eec26f | 2168 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 2169 | *array = sample->ip; |
74eec26f AV |
2170 | array++; |
2171 | } | |
2172 | ||
2173 | if (type & PERF_SAMPLE_TID) { | |
2174 | u.val32[0] = sample->pid; | |
2175 | u.val32[1] = sample->tid; | |
2176 | if (swapped) { | |
2177 | /* | |
a3f698fe | 2178 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
2179 | */ |
2180 | u.val32[0] = bswap_32(u.val32[0]); | |
2181 | u.val32[1] = bswap_32(u.val32[1]); | |
2182 | u.val64 = bswap_64(u.val64); | |
2183 | } | |
2184 | ||
2185 | *array = u.val64; | |
2186 | array++; | |
2187 | } | |
2188 | ||
2189 | if (type & PERF_SAMPLE_TIME) { | |
2190 | *array = sample->time; | |
2191 | array++; | |
2192 | } | |
2193 | ||
2194 | if (type & PERF_SAMPLE_ADDR) { | |
2195 | *array = sample->addr; | |
2196 | array++; | |
2197 | } | |
2198 | ||
2199 | if (type & PERF_SAMPLE_ID) { | |
2200 | *array = sample->id; | |
2201 | array++; | |
2202 | } | |
2203 | ||
2204 | if (type & PERF_SAMPLE_STREAM_ID) { | |
2205 | *array = sample->stream_id; | |
2206 | array++; | |
2207 | } | |
2208 | ||
2209 | if (type & PERF_SAMPLE_CPU) { | |
2210 | u.val32[0] = sample->cpu; | |
2211 | if (swapped) { | |
2212 | /* | |
a3f698fe | 2213 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
2214 | */ |
2215 | u.val32[0] = bswap_32(u.val32[0]); | |
2216 | u.val64 = bswap_64(u.val64); | |
2217 | } | |
2218 | *array = u.val64; | |
2219 | array++; | |
2220 | } | |
2221 | ||
2222 | if (type & PERF_SAMPLE_PERIOD) { | |
2223 | *array = sample->period; | |
2224 | array++; | |
2225 | } | |
2226 | ||
d03f2170 AH |
2227 | if (type & PERF_SAMPLE_READ) { |
2228 | if (read_format & PERF_FORMAT_GROUP) | |
2229 | *array = sample->read.group.nr; | |
2230 | else | |
2231 | *array = sample->read.one.value; | |
2232 | array++; | |
2233 | ||
2234 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
2235 | *array = sample->read.time_enabled; | |
2236 | array++; | |
2237 | } | |
2238 | ||
2239 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
2240 | *array = sample->read.time_running; | |
2241 | array++; | |
2242 | } | |
2243 | ||
2244 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
2245 | if (read_format & PERF_FORMAT_GROUP) { | |
2246 | sz = sample->read.group.nr * | |
2247 | sizeof(struct sample_read_value); | |
2248 | memcpy(array, sample->read.group.values, sz); | |
2249 | array = (void *)array + sz; | |
2250 | } else { | |
2251 | *array = sample->read.one.id; | |
2252 | array++; | |
2253 | } | |
2254 | } | |
2255 | ||
2256 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
2257 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
2258 | memcpy(array, sample->callchain, sz); | |
2259 | array = (void *)array + sz; | |
2260 | } | |
2261 | ||
2262 | if (type & PERF_SAMPLE_RAW) { | |
2263 | u.val32[0] = sample->raw_size; | |
2264 | if (WARN_ONCE(swapped, | |
2265 | "Endianness of raw data not corrected!\n")) { | |
2266 | /* | |
2267 | * Inverse of what is done in perf_evsel__parse_sample | |
2268 | */ | |
2269 | u.val32[0] = bswap_32(u.val32[0]); | |
2270 | u.val32[1] = bswap_32(u.val32[1]); | |
2271 | u.val64 = bswap_64(u.val64); | |
2272 | } | |
2273 | *array = u.val64; | |
2274 | array = (void *)array + sizeof(u32); | |
2275 | ||
2276 | memcpy(array, sample->raw_data, sample->raw_size); | |
2277 | array = (void *)array + sample->raw_size; | |
2278 | } | |
2279 | ||
2280 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
2281 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
2282 | sz += sizeof(u64); | |
2283 | memcpy(array, sample->branch_stack, sz); | |
2284 | array = (void *)array + sz; | |
2285 | } | |
2286 | ||
2287 | if (type & PERF_SAMPLE_REGS_USER) { | |
2288 | if (sample->user_regs.abi) { | |
2289 | *array++ = sample->user_regs.abi; | |
352ea45a | 2290 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
d03f2170 AH |
2291 | memcpy(array, sample->user_regs.regs, sz); |
2292 | array = (void *)array + sz; | |
2293 | } else { | |
2294 | *array++ = 0; | |
2295 | } | |
2296 | } | |
2297 | ||
2298 | if (type & PERF_SAMPLE_STACK_USER) { | |
2299 | sz = sample->user_stack.size; | |
2300 | *array++ = sz; | |
2301 | if (sz) { | |
2302 | memcpy(array, sample->user_stack.data, sz); | |
2303 | array = (void *)array + sz; | |
2304 | *array++ = sz; | |
2305 | } | |
2306 | } | |
2307 | ||
2308 | if (type & PERF_SAMPLE_WEIGHT) { | |
2309 | *array = sample->weight; | |
2310 | array++; | |
2311 | } | |
2312 | ||
2313 | if (type & PERF_SAMPLE_DATA_SRC) { | |
2314 | *array = sample->data_src; | |
2315 | array++; | |
2316 | } | |
2317 | ||
42d88910 AH |
2318 | if (type & PERF_SAMPLE_TRANSACTION) { |
2319 | *array = sample->transaction; | |
2320 | array++; | |
2321 | } | |
2322 | ||
6a21c0b5 SE |
2323 | if (type & PERF_SAMPLE_REGS_INTR) { |
2324 | if (sample->intr_regs.abi) { | |
2325 | *array++ = sample->intr_regs.abi; | |
2326 | sz = hweight_long(sample->intr_regs.mask) * sizeof(u64); | |
2327 | memcpy(array, sample->intr_regs.regs, sz); | |
2328 | array = (void *)array + sz; | |
2329 | } else { | |
2330 | *array++ = 0; | |
2331 | } | |
2332 | } | |
2333 | ||
74eec26f AV |
2334 | return 0; |
2335 | } | |
5555ded4 | 2336 | |
efd2b924 ACM |
2337 | struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name) |
2338 | { | |
2339 | return pevent_find_field(evsel->tp_format, name); | |
2340 | } | |
2341 | ||
5d2074ea | 2342 | void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample, |
5555ded4 ACM |
2343 | const char *name) |
2344 | { | |
efd2b924 | 2345 | struct format_field *field = perf_evsel__field(evsel, name); |
5555ded4 ACM |
2346 | int offset; |
2347 | ||
efd2b924 ACM |
2348 | if (!field) |
2349 | return NULL; | |
5555ded4 ACM |
2350 | |
2351 | offset = field->offset; | |
2352 | ||
2353 | if (field->flags & FIELD_IS_DYNAMIC) { | |
2354 | offset = *(int *)(sample->raw_data + field->offset); | |
2355 | offset &= 0xffff; | |
2356 | } | |
2357 | ||
2358 | return sample->raw_data + offset; | |
2359 | } | |
2360 | ||
90525176 ACM |
2361 | u64 format_field__intval(struct format_field *field, struct perf_sample *sample, |
2362 | bool needs_swap) | |
5555ded4 | 2363 | { |
e6b6f679 | 2364 | u64 value; |
90525176 | 2365 | void *ptr = sample->raw_data + field->offset; |
5555ded4 | 2366 | |
e6b6f679 ACM |
2367 | switch (field->size) { |
2368 | case 1: | |
2369 | return *(u8 *)ptr; | |
2370 | case 2: | |
2371 | value = *(u16 *)ptr; | |
2372 | break; | |
2373 | case 4: | |
2374 | value = *(u32 *)ptr; | |
2375 | break; | |
2376 | case 8: | |
e94eedab | 2377 | memcpy(&value, ptr, sizeof(u64)); |
e6b6f679 ACM |
2378 | break; |
2379 | default: | |
2380 | return 0; | |
2381 | } | |
2382 | ||
90525176 | 2383 | if (!needs_swap) |
e6b6f679 ACM |
2384 | return value; |
2385 | ||
2386 | switch (field->size) { | |
2387 | case 2: | |
2388 | return bswap_16(value); | |
2389 | case 4: | |
2390 | return bswap_32(value); | |
2391 | case 8: | |
2392 | return bswap_64(value); | |
2393 | default: | |
2394 | return 0; | |
2395 | } | |
2396 | ||
2397 | return 0; | |
5555ded4 | 2398 | } |
0698aedd | 2399 | |
90525176 ACM |
2400 | u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample, |
2401 | const char *name) | |
2402 | { | |
2403 | struct format_field *field = perf_evsel__field(evsel, name); | |
2404 | ||
2405 | if (!field) | |
2406 | return 0; | |
2407 | ||
2408 | return field ? format_field__intval(field, sample, evsel->needs_swap) : 0; | |
2409 | } | |
2410 | ||
c0a54341 ACM |
2411 | bool perf_evsel__fallback(struct perf_evsel *evsel, int err, |
2412 | char *msg, size_t msgsize) | |
2413 | { | |
08094828 ACM |
2414 | int paranoid; |
2415 | ||
2b821cce | 2416 | if ((err == ENOENT || err == ENXIO || err == ENODEV) && |
c0a54341 ACM |
2417 | evsel->attr.type == PERF_TYPE_HARDWARE && |
2418 | evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) { | |
2419 | /* | |
2420 | * If it's cycles then fall back to hrtimer based | |
2421 | * cpu-clock-tick sw counter, which is always available even if | |
2422 | * no PMU support. | |
2423 | * | |
2424 | * PPC returns ENXIO until 2.6.37 (behavior changed with commit | |
2425 | * b0a873e). | |
2426 | */ | |
2427 | scnprintf(msg, msgsize, "%s", | |
2428 | "The cycles event is not supported, trying to fall back to cpu-clock-ticks"); | |
2429 | ||
2430 | evsel->attr.type = PERF_TYPE_SOFTWARE; | |
2431 | evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK; | |
2432 | ||
04662523 | 2433 | zfree(&evsel->name); |
08094828 ACM |
2434 | return true; |
2435 | } else if (err == EACCES && !evsel->attr.exclude_kernel && | |
2436 | (paranoid = perf_event_paranoid()) > 1) { | |
2437 | const char *name = perf_evsel__name(evsel); | |
2438 | char *new_name; | |
2439 | ||
2440 | if (asprintf(&new_name, "%s%su", name, strchr(name, ':') ? "" : ":") < 0) | |
2441 | return false; | |
2442 | ||
2443 | if (evsel->name) | |
2444 | free(evsel->name); | |
2445 | evsel->name = new_name; | |
2446 | scnprintf(msg, msgsize, | |
2447 | "kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid); | |
2448 | evsel->attr.exclude_kernel = 1; | |
2449 | ||
c0a54341 ACM |
2450 | return true; |
2451 | } | |
2452 | ||
2453 | return false; | |
2454 | } | |
56e52e85 | 2455 | |
602ad878 | 2456 | int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, |
56e52e85 ACM |
2457 | int err, char *msg, size_t size) |
2458 | { | |
6e81c74c MH |
2459 | char sbuf[STRERR_BUFSIZE]; |
2460 | ||
56e52e85 ACM |
2461 | switch (err) { |
2462 | case EPERM: | |
2463 | case EACCES: | |
b69e63a4 | 2464 | return scnprintf(msg, size, |
3379e0c3 BH |
2465 | "You may not have permission to collect %sstats.\n\n" |
2466 | "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n" | |
2467 | "which controls use of the performance events system by\n" | |
2468 | "unprivileged users (without CAP_SYS_ADMIN).\n\n" | |
7d173913 | 2469 | "The current value is %d:\n\n" |
3379e0c3 BH |
2470 | " -1: Allow use of (almost) all events by all users\n" |
2471 | ">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n" | |
2472 | ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n" | |
d6195a6a ACM |
2473 | ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN\n\n" |
2474 | "To make this setting permanent, edit /etc/sysctl.conf too, e.g.:\n\n" | |
2475 | " kernel.perf_event_paranoid = -1\n" , | |
7d173913 ACM |
2476 | target->system_wide ? "system-wide " : "", |
2477 | perf_event_paranoid()); | |
56e52e85 ACM |
2478 | case ENOENT: |
2479 | return scnprintf(msg, size, "The %s event is not supported.", | |
2480 | perf_evsel__name(evsel)); | |
2481 | case EMFILE: | |
2482 | return scnprintf(msg, size, "%s", | |
2483 | "Too many events are opened.\n" | |
18ffdfe8 JO |
2484 | "Probably the maximum number of open file descriptors has been reached.\n" |
2485 | "Hint: Try again after reducing the number of events.\n" | |
2486 | "Hint: Try increasing the limit with 'ulimit -n <limit>'"); | |
de46d526 ACM |
2487 | case ENOMEM: |
2488 | if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0 && | |
2489 | access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0) | |
2490 | return scnprintf(msg, size, | |
2491 | "Not enough memory to setup event with callchain.\n" | |
2492 | "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n" | |
2493 | "Hint: Current value: %d", sysctl_perf_event_max_stack); | |
2494 | break; | |
56e52e85 ACM |
2495 | case ENODEV: |
2496 | if (target->cpu_list) | |
2497 | return scnprintf(msg, size, "%s", | |
81d64f46 | 2498 | "No such device - did you specify an out-of-range profile CPU?"); |
56e52e85 ACM |
2499 | break; |
2500 | case EOPNOTSUPP: | |
dc89e75a VG |
2501 | if (evsel->attr.sample_period != 0) |
2502 | return scnprintf(msg, size, "%s", | |
2503 | "PMU Hardware doesn't support sampling/overflow-interrupts."); | |
56e52e85 ACM |
2504 | if (evsel->attr.precise_ip) |
2505 | return scnprintf(msg, size, "%s", | |
2506 | "\'precise\' request may not be supported. Try removing 'p' modifier."); | |
2507 | #if defined(__i386__) || defined(__x86_64__) | |
2508 | if (evsel->attr.type == PERF_TYPE_HARDWARE) | |
2509 | return scnprintf(msg, size, "%s", | |
2510 | "No hardware sampling interrupt available.\n" | |
2511 | "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it."); | |
2512 | #endif | |
2513 | break; | |
63914aca JO |
2514 | case EBUSY: |
2515 | if (find_process("oprofiled")) | |
2516 | return scnprintf(msg, size, | |
2517 | "The PMU counters are busy/taken by another profiler.\n" | |
2518 | "We found oprofile daemon running, please stop it and try again."); | |
2519 | break; | |
814c8c38 | 2520 | case EINVAL: |
32a951b4 | 2521 | if (evsel->attr.write_backward && perf_missing_features.write_backward) |
7da36e94 | 2522 | return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel."); |
814c8c38 PZ |
2523 | if (perf_missing_features.clockid) |
2524 | return scnprintf(msg, size, "clockid feature not supported."); | |
2525 | if (perf_missing_features.clockid_wrong) | |
2526 | return scnprintf(msg, size, "wrong clockid (%d).", clockid); | |
2527 | break; | |
56e52e85 ACM |
2528 | default: |
2529 | break; | |
2530 | } | |
2531 | ||
2532 | return scnprintf(msg, size, | |
6e81c74c | 2533 | "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" |
56e52e85 | 2534 | "/bin/dmesg may provide additional information.\n" |
81d64f46 | 2535 | "No CONFIG_PERF_EVENTS=y kernel support configured?", |
c8b5f2c9 | 2536 | err, str_error_r(err, sbuf, sizeof(sbuf)), |
6e81c74c | 2537 | perf_evsel__name(evsel)); |
56e52e85 | 2538 | } |
f4e47f9f RB |
2539 | |
2540 | char *perf_evsel__env_arch(struct perf_evsel *evsel) | |
2541 | { | |
2542 | if (evsel && evsel->evlist && evsel->evlist->env) | |
2543 | return evsel->evlist->env->arch; | |
2544 | return NULL; | |
2545 | } |