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91007045 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f8a95309 ACM |
2 | /* |
3 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
4 | * | |
5 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
6 | * copyright notes. | |
f8a95309 ACM |
7 | */ |
8 | ||
936be503 | 9 | #include <byteswap.h> |
a43783ae | 10 | #include <errno.h> |
fd20e811 | 11 | #include <inttypes.h> |
0f6a3015 | 12 | #include <linux/bitops.h> |
2157f6ee | 13 | #include <api/fs/fs.h> |
4605eab3 | 14 | #include <api/fs/tracing_path.h> |
4e319027 RR |
15 | #include <traceevent/event-parse.h> |
16 | #include <linux/hw_breakpoint.h> | |
17 | #include <linux/perf_event.h> | |
0353631a | 18 | #include <linux/compiler.h> |
8dd2a131 | 19 | #include <linux/err.h> |
7f7c536f | 20 | #include <linux/zalloc.h> |
86a5e0c2 | 21 | #include <sys/ioctl.h> |
bec19672 | 22 | #include <sys/resource.h> |
2157f6ee ACM |
23 | #include <sys/types.h> |
24 | #include <dirent.h> | |
f2a39fe8 | 25 | #include <stdlib.h> |
b04c597a | 26 | #include <perf/evsel.h> |
4e319027 | 27 | #include "asm/bug.h" |
8f651eae | 28 | #include "callchain.h" |
f14d5707 | 29 | #include "cgroup.h" |
ddee688a | 30 | #include "counts.h" |
5ab8c689 | 31 | #include "event.h" |
69aad6f1 | 32 | #include "evsel.h" |
9db0e363 | 33 | #include "util/env.h" |
95be9d19 | 34 | #include "util/evsel_config.h" |
ca125277 | 35 | #include "util/evsel_fprintf.h" |
70082dd9 | 36 | #include "evlist.h" |
87ffb6c6 | 37 | #include <perf/cpumap.h> |
fd78260b | 38 | #include "thread_map.h" |
12864b31 | 39 | #include "target.h" |
26d33022 | 40 | #include "perf_regs.h" |
aeb00b1a | 41 | #include "record.h" |
e3e1a54f | 42 | #include "debug.h" |
97978b3e | 43 | #include "trace-event.h" |
a9a3a4d9 | 44 | #include "stat.h" |
6a9fa4e3 | 45 | #include "string2.h" |
f9d8adb3 | 46 | #include "memswap.h" |
2da39f1c | 47 | #include "util.h" |
91854f9a | 48 | #include "../perf-sys.h" |
ac12f676 | 49 | #include "util/parse-branch-options.h" |
76466024 | 50 | #include <internal/xyarray.h> |
fb71c86c | 51 | #include <internal/lib.h> |
69aad6f1 | 52 | |
3052ba56 | 53 | #include <linux/ctype.h> |
3d689ed6 | 54 | |
9a831b3a | 55 | struct perf_missing_features perf_missing_features; |
594ac61a | 56 | |
814c8c38 PZ |
57 | static clockid_t clockid; |
58 | ||
32dcd021 | 59 | static int perf_evsel__no_extra_init(struct evsel *evsel __maybe_unused) |
ce8ccff5 ACM |
60 | { |
61 | return 0; | |
62 | } | |
63 | ||
10213e2f JO |
64 | void __weak test_attr__ready(void) { } |
65 | ||
32dcd021 | 66 | static void perf_evsel__no_extra_fini(struct evsel *evsel __maybe_unused) |
ce8ccff5 ACM |
67 | { |
68 | } | |
69 | ||
70 | static struct { | |
71 | size_t size; | |
32dcd021 JO |
72 | int (*init)(struct evsel *evsel); |
73 | void (*fini)(struct evsel *evsel); | |
ce8ccff5 | 74 | } perf_evsel__object = { |
32dcd021 | 75 | .size = sizeof(struct evsel), |
ce8ccff5 ACM |
76 | .init = perf_evsel__no_extra_init, |
77 | .fini = perf_evsel__no_extra_fini, | |
78 | }; | |
79 | ||
80 | int perf_evsel__object_config(size_t object_size, | |
32dcd021 JO |
81 | int (*init)(struct evsel *evsel), |
82 | void (*fini)(struct evsel *evsel)) | |
ce8ccff5 ACM |
83 | { |
84 | ||
85 | if (object_size == 0) | |
86 | goto set_methods; | |
87 | ||
88 | if (perf_evsel__object.size > object_size) | |
89 | return -EINVAL; | |
90 | ||
91 | perf_evsel__object.size = object_size; | |
92 | ||
93 | set_methods: | |
94 | if (init != NULL) | |
95 | perf_evsel__object.init = init; | |
96 | ||
97 | if (fini != NULL) | |
98 | perf_evsel__object.fini = fini; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
9dfcb759 | 103 | #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y)) |
c52b12ed | 104 | |
2aaefde4 | 105 | int __evsel__sample_size(u64 sample_type) |
c2a70653 ACM |
106 | { |
107 | u64 mask = sample_type & PERF_SAMPLE_MASK; | |
108 | int size = 0; | |
109 | int i; | |
110 | ||
111 | for (i = 0; i < 64; i++) { | |
112 | if (mask & (1ULL << i)) | |
113 | size++; | |
114 | } | |
115 | ||
116 | size *= sizeof(u64); | |
117 | ||
118 | return size; | |
119 | } | |
120 | ||
75562573 AH |
121 | /** |
122 | * __perf_evsel__calc_id_pos - calculate id_pos. | |
123 | * @sample_type: sample type | |
124 | * | |
125 | * This function returns the position of the event id (PERF_SAMPLE_ID or | |
126 | * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct | |
69d81f09 | 127 | * perf_record_sample. |
75562573 AH |
128 | */ |
129 | static int __perf_evsel__calc_id_pos(u64 sample_type) | |
130 | { | |
131 | int idx = 0; | |
132 | ||
133 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
134 | return 0; | |
135 | ||
136 | if (!(sample_type & PERF_SAMPLE_ID)) | |
137 | return -1; | |
138 | ||
139 | if (sample_type & PERF_SAMPLE_IP) | |
140 | idx += 1; | |
141 | ||
142 | if (sample_type & PERF_SAMPLE_TID) | |
143 | idx += 1; | |
144 | ||
145 | if (sample_type & PERF_SAMPLE_TIME) | |
146 | idx += 1; | |
147 | ||
148 | if (sample_type & PERF_SAMPLE_ADDR) | |
149 | idx += 1; | |
150 | ||
151 | return idx; | |
152 | } | |
153 | ||
154 | /** | |
155 | * __perf_evsel__calc_is_pos - calculate is_pos. | |
156 | * @sample_type: sample type | |
157 | * | |
158 | * This function returns the position (counting backwards) of the event id | |
159 | * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if | |
160 | * sample_id_all is used there is an id sample appended to non-sample events. | |
161 | */ | |
162 | static int __perf_evsel__calc_is_pos(u64 sample_type) | |
163 | { | |
164 | int idx = 1; | |
165 | ||
166 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
167 | return 1; | |
168 | ||
169 | if (!(sample_type & PERF_SAMPLE_ID)) | |
170 | return -1; | |
171 | ||
172 | if (sample_type & PERF_SAMPLE_CPU) | |
173 | idx += 1; | |
174 | ||
175 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
176 | idx += 1; | |
177 | ||
178 | return idx; | |
179 | } | |
180 | ||
4b5e87b7 | 181 | void evsel__calc_id_pos(struct evsel *evsel) |
75562573 | 182 | { |
1fc632ce JO |
183 | evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type); |
184 | evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type); | |
75562573 AH |
185 | } |
186 | ||
862b2f8f | 187 | void __evsel__set_sample_bit(struct evsel *evsel, |
7be5ebe8 ACM |
188 | enum perf_event_sample_format bit) |
189 | { | |
1fc632ce JO |
190 | if (!(evsel->core.attr.sample_type & bit)) { |
191 | evsel->core.attr.sample_type |= bit; | |
7be5ebe8 | 192 | evsel->sample_size += sizeof(u64); |
4b5e87b7 | 193 | evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
194 | } |
195 | } | |
196 | ||
862b2f8f | 197 | void __evsel__reset_sample_bit(struct evsel *evsel, |
7be5ebe8 ACM |
198 | enum perf_event_sample_format bit) |
199 | { | |
1fc632ce JO |
200 | if (evsel->core.attr.sample_type & bit) { |
201 | evsel->core.attr.sample_type &= ~bit; | |
7be5ebe8 | 202 | evsel->sample_size -= sizeof(u64); |
4b5e87b7 | 203 | evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
204 | } |
205 | } | |
206 | ||
862b2f8f | 207 | void evsel__set_sample_id(struct evsel *evsel, |
75562573 | 208 | bool can_sample_identifier) |
7a5a5ca5 | 209 | { |
75562573 | 210 | if (can_sample_identifier) { |
862b2f8f ACM |
211 | evsel__reset_sample_bit(evsel, ID); |
212 | evsel__set_sample_bit(evsel, IDENTIFIER); | |
75562573 | 213 | } else { |
862b2f8f | 214 | evsel__set_sample_bit(evsel, ID); |
75562573 | 215 | } |
1fc632ce | 216 | evsel->core.attr.read_format |= PERF_FORMAT_ID; |
7a5a5ca5 ACM |
217 | } |
218 | ||
5496bc0c | 219 | /** |
c754c382 | 220 | * evsel__is_function_event - Return whether given evsel is a function |
5496bc0c ACM |
221 | * trace event |
222 | * | |
223 | * @evsel - evsel selector to be tested | |
224 | * | |
225 | * Return %true if event is function trace event | |
226 | */ | |
c754c382 | 227 | bool evsel__is_function_event(struct evsel *evsel) |
5496bc0c ACM |
228 | { |
229 | #define FUNCTION_EVENT "ftrace:function" | |
230 | ||
231 | return evsel->name && | |
232 | !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT)); | |
233 | ||
234 | #undef FUNCTION_EVENT | |
235 | } | |
236 | ||
b4b62ee6 JO |
237 | void evsel__init(struct evsel *evsel, |
238 | struct perf_event_attr *attr, int idx) | |
ef1d1af2 | 239 | { |
1fc632ce | 240 | perf_evsel__init(&evsel->core, attr); |
ef1d1af2 | 241 | evsel->idx = idx; |
60b0896c | 242 | evsel->tracking = !idx; |
2cfda562 | 243 | evsel->leader = evsel; |
410136f5 SE |
244 | evsel->unit = ""; |
245 | evsel->scale = 1.0; | |
2fda5ada | 246 | evsel->max_events = ULONG_MAX; |
d49e4695 | 247 | evsel->evlist = NULL; |
af4a0991 | 248 | evsel->bpf_obj = NULL; |
1f45b1d4 | 249 | evsel->bpf_fd = -1; |
930a2e29 | 250 | INIT_LIST_HEAD(&evsel->config_terms); |
ce8ccff5 | 251 | perf_evsel__object.init(evsel); |
2aaefde4 | 252 | evsel->sample_size = __evsel__sample_size(attr->sample_type); |
4b5e87b7 | 253 | evsel__calc_id_pos(evsel); |
15bfd2cc | 254 | evsel->cmdline_group_boundary = false; |
37932c18 | 255 | evsel->metric_expr = NULL; |
96284814 | 256 | evsel->metric_name = NULL; |
37932c18 AK |
257 | evsel->metric_events = NULL; |
258 | evsel->collect_stat = false; | |
8c5421c0 | 259 | evsel->pmu_name = NULL; |
ef1d1af2 ACM |
260 | } |
261 | ||
32dcd021 | 262 | struct evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) |
69aad6f1 | 263 | { |
32dcd021 | 264 | struct evsel *evsel = zalloc(perf_evsel__object.size); |
69aad6f1 | 265 | |
fd8d2702 HT |
266 | if (!evsel) |
267 | return NULL; | |
b4b62ee6 | 268 | evsel__init(evsel, attr, idx); |
69aad6f1 | 269 | |
c754c382 | 270 | if (evsel__is_bpf_output(evsel)) { |
1fc632ce | 271 | evsel->core.attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | |
d37ba880 | 272 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), |
1fc632ce | 273 | evsel->core.attr.sample_period = 1; |
03e0a7df WN |
274 | } |
275 | ||
c754c382 | 276 | if (evsel__is_clock(evsel)) { |
0aa802a7 JO |
277 | /* |
278 | * The evsel->unit points to static alias->unit | |
279 | * so it's ok to use static string in here. | |
280 | */ | |
281 | static const char *unit = "msec"; | |
282 | ||
283 | evsel->unit = unit; | |
284 | evsel->scale = 1e-6; | |
285 | } | |
286 | ||
69aad6f1 ACM |
287 | return evsel; |
288 | } | |
289 | ||
f1e52f14 ACM |
290 | static bool perf_event_can_profile_kernel(void) |
291 | { | |
aa97293f | 292 | return perf_event_paranoid_check(1); |
f1e52f14 ACM |
293 | } |
294 | ||
32dcd021 | 295 | struct evsel *perf_evsel__new_cycles(bool precise) |
7c48dcfd ACM |
296 | { |
297 | struct perf_event_attr attr = { | |
298 | .type = PERF_TYPE_HARDWARE, | |
299 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
f1e52f14 | 300 | .exclude_kernel = !perf_event_can_profile_kernel(), |
7c48dcfd | 301 | }; |
32dcd021 | 302 | struct evsel *evsel; |
7c48dcfd ACM |
303 | |
304 | event_attr_init(&attr); | |
30269dc1 ACM |
305 | |
306 | if (!precise) | |
307 | goto new_event; | |
7c48dcfd | 308 | |
7a1ac110 ACM |
309 | /* |
310 | * Now let the usual logic to set up the perf_event_attr defaults | |
311 | * to kick in when we return and before perf_evsel__open() is called. | |
312 | */ | |
30269dc1 | 313 | new_event: |
365c3ae7 | 314 | evsel = evsel__new(&attr); |
7c48dcfd ACM |
315 | if (evsel == NULL) |
316 | goto out; | |
317 | ||
4e8a5c15 JO |
318 | evsel->precise_max = true; |
319 | ||
7c48dcfd | 320 | /* use asprintf() because free(evsel) assumes name is allocated */ |
ede5626d ACM |
321 | if (asprintf(&evsel->name, "cycles%s%s%.*s", |
322 | (attr.precise_ip || attr.exclude_kernel) ? ":" : "", | |
323 | attr.exclude_kernel ? "u" : "", | |
324 | attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0) | |
7c48dcfd ACM |
325 | goto error_free; |
326 | out: | |
327 | return evsel; | |
328 | error_free: | |
5eb2dd2a | 329 | evsel__delete(evsel); |
7c48dcfd ACM |
330 | evsel = NULL; |
331 | goto out; | |
332 | } | |
333 | ||
8dd2a131 JO |
334 | /* |
335 | * Returns pointer with encoded error via <linux/err.h> interface. | |
336 | */ | |
32dcd021 | 337 | struct evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx) |
efd2b924 | 338 | { |
32dcd021 | 339 | struct evsel *evsel = zalloc(perf_evsel__object.size); |
8dd2a131 | 340 | int err = -ENOMEM; |
efd2b924 | 341 | |
8dd2a131 JO |
342 | if (evsel == NULL) { |
343 | goto out_err; | |
344 | } else { | |
efd2b924 | 345 | struct perf_event_attr attr = { |
0b80f8b3 ACM |
346 | .type = PERF_TYPE_TRACEPOINT, |
347 | .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | | |
348 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
efd2b924 ACM |
349 | }; |
350 | ||
e48ffe2b ACM |
351 | if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) |
352 | goto out_free; | |
353 | ||
97978b3e | 354 | evsel->tp_format = trace_event__tp_format(sys, name); |
8dd2a131 JO |
355 | if (IS_ERR(evsel->tp_format)) { |
356 | err = PTR_ERR(evsel->tp_format); | |
efd2b924 | 357 | goto out_free; |
8dd2a131 | 358 | } |
efd2b924 | 359 | |
0b80f8b3 | 360 | event_attr_init(&attr); |
efd2b924 | 361 | attr.config = evsel->tp_format->id; |
0b80f8b3 | 362 | attr.sample_period = 1; |
b4b62ee6 | 363 | evsel__init(evsel, &attr, idx); |
efd2b924 ACM |
364 | } |
365 | ||
366 | return evsel; | |
367 | ||
368 | out_free: | |
74cf249d | 369 | zfree(&evsel->name); |
efd2b924 | 370 | free(evsel); |
8dd2a131 JO |
371 | out_err: |
372 | return ERR_PTR(err); | |
efd2b924 ACM |
373 | } |
374 | ||
8ad7013b | 375 | const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = { |
c410431c ACM |
376 | "cycles", |
377 | "instructions", | |
378 | "cache-references", | |
379 | "cache-misses", | |
380 | "branches", | |
381 | "branch-misses", | |
382 | "bus-cycles", | |
383 | "stalled-cycles-frontend", | |
384 | "stalled-cycles-backend", | |
385 | "ref-cycles", | |
386 | }; | |
387 | ||
8ab2e96d | 388 | static const char *__evsel__hw_name(u64 config) |
c410431c ACM |
389 | { |
390 | if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config]) | |
391 | return perf_evsel__hw_names[config]; | |
392 | ||
393 | return "unknown-hardware"; | |
394 | } | |
395 | ||
32dcd021 | 396 | static int perf_evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size) |
c410431c | 397 | { |
27f18617 | 398 | int colon = 0, r = 0; |
1fc632ce | 399 | struct perf_event_attr *attr = &evsel->core.attr; |
c410431c ACM |
400 | bool exclude_guest_default = false; |
401 | ||
402 | #define MOD_PRINT(context, mod) do { \ | |
403 | if (!attr->exclude_##context) { \ | |
27f18617 | 404 | if (!colon) colon = ++r; \ |
c410431c ACM |
405 | r += scnprintf(bf + r, size - r, "%c", mod); \ |
406 | } } while(0) | |
407 | ||
408 | if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { | |
409 | MOD_PRINT(kernel, 'k'); | |
410 | MOD_PRINT(user, 'u'); | |
411 | MOD_PRINT(hv, 'h'); | |
412 | exclude_guest_default = true; | |
413 | } | |
414 | ||
415 | if (attr->precise_ip) { | |
416 | if (!colon) | |
27f18617 | 417 | colon = ++r; |
c410431c ACM |
418 | r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); |
419 | exclude_guest_default = true; | |
420 | } | |
421 | ||
422 | if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { | |
423 | MOD_PRINT(host, 'H'); | |
424 | MOD_PRINT(guest, 'G'); | |
425 | } | |
426 | #undef MOD_PRINT | |
427 | if (colon) | |
27f18617 | 428 | bf[colon - 1] = ':'; |
c410431c ACM |
429 | return r; |
430 | } | |
431 | ||
8ab2e96d | 432 | static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size) |
27f18617 | 433 | { |
8ab2e96d | 434 | int r = scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config)); |
27f18617 ACM |
435 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); |
436 | } | |
437 | ||
8ad7013b | 438 | const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = { |
335c2f5d ACM |
439 | "cpu-clock", |
440 | "task-clock", | |
441 | "page-faults", | |
442 | "context-switches", | |
8ad7013b | 443 | "cpu-migrations", |
335c2f5d ACM |
444 | "minor-faults", |
445 | "major-faults", | |
446 | "alignment-faults", | |
447 | "emulation-faults", | |
d22d1a2a | 448 | "dummy", |
335c2f5d ACM |
449 | }; |
450 | ||
8ab2e96d | 451 | static const char *__evsel__sw_name(u64 config) |
335c2f5d ACM |
452 | { |
453 | if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config]) | |
454 | return perf_evsel__sw_names[config]; | |
455 | return "unknown-software"; | |
456 | } | |
457 | ||
8ab2e96d | 458 | static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size) |
335c2f5d | 459 | { |
8ab2e96d | 460 | int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config)); |
335c2f5d ACM |
461 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); |
462 | } | |
463 | ||
8ab2e96d | 464 | static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) |
287e74aa JO |
465 | { |
466 | int r; | |
467 | ||
468 | r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); | |
469 | ||
470 | if (type & HW_BREAKPOINT_R) | |
471 | r += scnprintf(bf + r, size - r, "r"); | |
472 | ||
473 | if (type & HW_BREAKPOINT_W) | |
474 | r += scnprintf(bf + r, size - r, "w"); | |
475 | ||
476 | if (type & HW_BREAKPOINT_X) | |
477 | r += scnprintf(bf + r, size - r, "x"); | |
478 | ||
479 | return r; | |
480 | } | |
481 | ||
8ab2e96d | 482 | static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size) |
287e74aa | 483 | { |
1fc632ce | 484 | struct perf_event_attr *attr = &evsel->core.attr; |
8ab2e96d | 485 | int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); |
287e74aa JO |
486 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); |
487 | } | |
488 | ||
0b668bc9 ACM |
489 | const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX] |
490 | [PERF_EVSEL__MAX_ALIASES] = { | |
491 | { "L1-dcache", "l1-d", "l1d", "L1-data", }, | |
492 | { "L1-icache", "l1-i", "l1i", "L1-instruction", }, | |
493 | { "LLC", "L2", }, | |
494 | { "dTLB", "d-tlb", "Data-TLB", }, | |
495 | { "iTLB", "i-tlb", "Instruction-TLB", }, | |
496 | { "branch", "branches", "bpu", "btb", "bpc", }, | |
497 | { "node", }, | |
498 | }; | |
499 | ||
500 | const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX] | |
501 | [PERF_EVSEL__MAX_ALIASES] = { | |
502 | { "load", "loads", "read", }, | |
503 | { "store", "stores", "write", }, | |
504 | { "prefetch", "prefetches", "speculative-read", "speculative-load", }, | |
505 | }; | |
506 | ||
507 | const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX] | |
508 | [PERF_EVSEL__MAX_ALIASES] = { | |
509 | { "refs", "Reference", "ops", "access", }, | |
510 | { "misses", "miss", }, | |
511 | }; | |
512 | ||
513 | #define C(x) PERF_COUNT_HW_CACHE_##x | |
514 | #define CACHE_READ (1 << C(OP_READ)) | |
515 | #define CACHE_WRITE (1 << C(OP_WRITE)) | |
516 | #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) | |
517 | #define COP(x) (1 << x) | |
518 | ||
519 | /* | |
520 | * cache operartion stat | |
521 | * L1I : Read and prefetch only | |
522 | * ITLB and BPU : Read-only | |
523 | */ | |
524 | static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = { | |
525 | [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
526 | [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), | |
527 | [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
528 | [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
529 | [C(ITLB)] = (CACHE_READ), | |
530 | [C(BPU)] = (CACHE_READ), | |
531 | [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
532 | }; | |
533 | ||
c754c382 | 534 | bool evsel__is_cache_op_valid(u8 type, u8 op) |
0b668bc9 ACM |
535 | { |
536 | if (perf_evsel__hw_cache_stat[type] & COP(op)) | |
537 | return true; /* valid */ | |
538 | else | |
539 | return false; /* invalid */ | |
540 | } | |
541 | ||
8ab2e96d | 542 | int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size) |
0b668bc9 ACM |
543 | { |
544 | if (result) { | |
545 | return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0], | |
546 | perf_evsel__hw_cache_op[op][0], | |
547 | perf_evsel__hw_cache_result[result][0]); | |
548 | } | |
549 | ||
550 | return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0], | |
551 | perf_evsel__hw_cache_op[op][1]); | |
552 | } | |
553 | ||
8ab2e96d | 554 | static int __evsel__hw_cache_name(u64 config, char *bf, size_t size) |
0b668bc9 ACM |
555 | { |
556 | u8 op, result, type = (config >> 0) & 0xff; | |
557 | const char *err = "unknown-ext-hardware-cache-type"; | |
558 | ||
c53412ee | 559 | if (type >= PERF_COUNT_HW_CACHE_MAX) |
0b668bc9 ACM |
560 | goto out_err; |
561 | ||
562 | op = (config >> 8) & 0xff; | |
563 | err = "unknown-ext-hardware-cache-op"; | |
c53412ee | 564 | if (op >= PERF_COUNT_HW_CACHE_OP_MAX) |
0b668bc9 ACM |
565 | goto out_err; |
566 | ||
567 | result = (config >> 16) & 0xff; | |
568 | err = "unknown-ext-hardware-cache-result"; | |
c53412ee | 569 | if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX) |
0b668bc9 ACM |
570 | goto out_err; |
571 | ||
572 | err = "invalid-cache"; | |
c754c382 | 573 | if (!evsel__is_cache_op_valid(type, op)) |
0b668bc9 ACM |
574 | goto out_err; |
575 | ||
8ab2e96d | 576 | return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size); |
0b668bc9 ACM |
577 | out_err: |
578 | return scnprintf(bf, size, "%s", err); | |
579 | } | |
580 | ||
8ab2e96d | 581 | static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size) |
0b668bc9 | 582 | { |
8ab2e96d | 583 | int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size); |
0b668bc9 ACM |
584 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); |
585 | } | |
586 | ||
8ab2e96d | 587 | static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size) |
6eef3d9c | 588 | { |
1fc632ce | 589 | int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config); |
6eef3d9c ACM |
590 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); |
591 | } | |
592 | ||
8ab2e96d | 593 | static int evsel__tool_name(char *bf, size_t size) |
3371f389 AK |
594 | { |
595 | int ret = scnprintf(bf, size, "duration_time"); | |
596 | return ret; | |
597 | } | |
598 | ||
8ab2e96d | 599 | const char *evsel__name(struct evsel *evsel) |
a4460836 | 600 | { |
7289f83c | 601 | char bf[128]; |
a4460836 | 602 | |
fdbdd7e8 ACM |
603 | if (!evsel) |
604 | goto out_unknown; | |
605 | ||
7289f83c ACM |
606 | if (evsel->name) |
607 | return evsel->name; | |
c410431c | 608 | |
1fc632ce | 609 | switch (evsel->core.attr.type) { |
c410431c | 610 | case PERF_TYPE_RAW: |
8ab2e96d | 611 | evsel__raw_name(evsel, bf, sizeof(bf)); |
c410431c ACM |
612 | break; |
613 | ||
614 | case PERF_TYPE_HARDWARE: | |
8ab2e96d | 615 | evsel__hw_name(evsel, bf, sizeof(bf)); |
c410431c | 616 | break; |
0b668bc9 ACM |
617 | |
618 | case PERF_TYPE_HW_CACHE: | |
8ab2e96d | 619 | evsel__hw_cache_name(evsel, bf, sizeof(bf)); |
0b668bc9 ACM |
620 | break; |
621 | ||
335c2f5d | 622 | case PERF_TYPE_SOFTWARE: |
3371f389 | 623 | if (evsel->tool_event) |
8ab2e96d | 624 | evsel__tool_name(bf, sizeof(bf)); |
3371f389 | 625 | else |
8ab2e96d | 626 | evsel__sw_name(evsel, bf, sizeof(bf)); |
335c2f5d ACM |
627 | break; |
628 | ||
a4460836 | 629 | case PERF_TYPE_TRACEPOINT: |
7289f83c | 630 | scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); |
a4460836 ACM |
631 | break; |
632 | ||
287e74aa | 633 | case PERF_TYPE_BREAKPOINT: |
8ab2e96d | 634 | evsel__bp_name(evsel, bf, sizeof(bf)); |
287e74aa JO |
635 | break; |
636 | ||
c410431c | 637 | default: |
ca1b1457 | 638 | scnprintf(bf, sizeof(bf), "unknown attr type: %d", |
1fc632ce | 639 | evsel->core.attr.type); |
a4460836 | 640 | break; |
c410431c ACM |
641 | } |
642 | ||
7289f83c ACM |
643 | evsel->name = strdup(bf); |
644 | ||
fdbdd7e8 ACM |
645 | if (evsel->name) |
646 | return evsel->name; | |
647 | out_unknown: | |
648 | return "unknown"; | |
c410431c ACM |
649 | } |
650 | ||
8ab2e96d | 651 | const char *evsel__group_name(struct evsel *evsel) |
717e263f NK |
652 | { |
653 | return evsel->group_name ?: "anon group"; | |
654 | } | |
655 | ||
8ef278bb JO |
656 | /* |
657 | * Returns the group details for the specified leader, | |
658 | * with following rules. | |
659 | * | |
660 | * For record -e '{cycles,instructions}' | |
661 | * 'anon group { cycles:u, instructions:u }' | |
662 | * | |
663 | * For record -e 'cycles,instructions' and report --group | |
664 | * 'cycles:u, instructions:u' | |
665 | */ | |
347c751a | 666 | int evsel__group_desc(struct evsel *evsel, char *buf, size_t size) |
717e263f | 667 | { |
8ef278bb | 668 | int ret = 0; |
32dcd021 | 669 | struct evsel *pos; |
8ab2e96d | 670 | const char *group_name = evsel__group_name(evsel); |
717e263f | 671 | |
8ef278bb JO |
672 | if (!evsel->forced_leader) |
673 | ret = scnprintf(buf, size, "%s { ", group_name); | |
717e263f | 674 | |
8ab2e96d | 675 | ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel)); |
717e263f NK |
676 | |
677 | for_each_group_member(pos, evsel) | |
8ab2e96d | 678 | ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos)); |
717e263f | 679 | |
8ef278bb JO |
680 | if (!evsel->forced_leader) |
681 | ret += scnprintf(buf + ret, size - ret, " }"); | |
717e263f NK |
682 | |
683 | return ret; | |
684 | } | |
685 | ||
6ec17b4e ACM |
686 | static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts, |
687 | struct callchain_param *param) | |
6bedfab6 | 688 | { |
c754c382 | 689 | bool function = evsel__is_function_event(evsel); |
1fc632ce | 690 | struct perf_event_attr *attr = &evsel->core.attr; |
6bedfab6 | 691 | |
862b2f8f | 692 | evsel__set_sample_bit(evsel, CALLCHAIN); |
6bedfab6 | 693 | |
792d48b4 ACM |
694 | attr->sample_max_stack = param->max_stack; |
695 | ||
53651b28 | 696 | if (opts->kernel_callchains) |
697 | attr->exclude_callchain_user = 1; | |
698 | if (opts->user_callchains) | |
699 | attr->exclude_callchain_kernel = 1; | |
c3a6a8c4 | 700 | if (param->record_mode == CALLCHAIN_LBR) { |
aad2b21c KL |
701 | if (!opts->branch_stack) { |
702 | if (attr->exclude_user) { | |
703 | pr_warning("LBR callstack option is only available " | |
704 | "to get user callchain information. " | |
705 | "Falling back to framepointers.\n"); | |
706 | } else { | |
862b2f8f | 707 | evsel__set_sample_bit(evsel, BRANCH_STACK); |
aad2b21c | 708 | attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER | |
bd0f8895 AK |
709 | PERF_SAMPLE_BRANCH_CALL_STACK | |
710 | PERF_SAMPLE_BRANCH_NO_CYCLES | | |
d3f85437 KL |
711 | PERF_SAMPLE_BRANCH_NO_FLAGS | |
712 | PERF_SAMPLE_BRANCH_HW_INDEX; | |
aad2b21c KL |
713 | } |
714 | } else | |
715 | pr_warning("Cannot use LBR callstack with branch stack. " | |
716 | "Falling back to framepointers.\n"); | |
717 | } | |
718 | ||
c3a6a8c4 | 719 | if (param->record_mode == CALLCHAIN_DWARF) { |
6bedfab6 | 720 | if (!function) { |
862b2f8f ACM |
721 | evsel__set_sample_bit(evsel, REGS_USER); |
722 | evsel__set_sample_bit(evsel, STACK_USER); | |
d194d8fc AB |
723 | if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) { |
724 | attr->sample_regs_user |= DWARF_MINIMAL_REGS; | |
725 | pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, " | |
726 | "specifying a subset with --user-regs may render DWARF unwinding unreliable, " | |
727 | "so the minimal registers set (IP, SP) is explicitly forced.\n"); | |
728 | } else { | |
729 | attr->sample_regs_user |= PERF_REGS_MASK; | |
730 | } | |
c3a6a8c4 | 731 | attr->sample_stack_user = param->dump_size; |
6bedfab6 JO |
732 | attr->exclude_callchain_user = 1; |
733 | } else { | |
734 | pr_info("Cannot use DWARF unwind for function trace event," | |
735 | " falling back to framepointers.\n"); | |
736 | } | |
737 | } | |
738 | ||
739 | if (function) { | |
740 | pr_info("Disabling user space callchains for function trace event.\n"); | |
741 | attr->exclude_callchain_user = 1; | |
742 | } | |
743 | } | |
744 | ||
6ec17b4e ACM |
745 | void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts, |
746 | struct callchain_param *param) | |
1688c2fd ACM |
747 | { |
748 | if (param->enabled) | |
6ec17b4e | 749 | return __evsel__config_callchain(evsel, opts, param); |
1688c2fd ACM |
750 | } |
751 | ||
d457c963 | 752 | static void |
32dcd021 | 753 | perf_evsel__reset_callgraph(struct evsel *evsel, |
d457c963 KL |
754 | struct callchain_param *param) |
755 | { | |
1fc632ce | 756 | struct perf_event_attr *attr = &evsel->core.attr; |
d457c963 | 757 | |
862b2f8f | 758 | evsel__reset_sample_bit(evsel, CALLCHAIN); |
d457c963 | 759 | if (param->record_mode == CALLCHAIN_LBR) { |
862b2f8f | 760 | evsel__reset_sample_bit(evsel, BRANCH_STACK); |
d457c963 | 761 | attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER | |
d3f85437 KL |
762 | PERF_SAMPLE_BRANCH_CALL_STACK | |
763 | PERF_SAMPLE_BRANCH_HW_INDEX); | |
d457c963 KL |
764 | } |
765 | if (param->record_mode == CALLCHAIN_DWARF) { | |
862b2f8f ACM |
766 | evsel__reset_sample_bit(evsel, REGS_USER); |
767 | evsel__reset_sample_bit(evsel, STACK_USER); | |
d457c963 KL |
768 | } |
769 | } | |
770 | ||
32dcd021 | 771 | static void apply_config_terms(struct evsel *evsel, |
0d3dcc0e | 772 | struct record_opts *opts, bool track) |
930a2e29 JO |
773 | { |
774 | struct perf_evsel_config_term *term; | |
32067712 | 775 | struct list_head *config_terms = &evsel->config_terms; |
1fc632ce | 776 | struct perf_event_attr *attr = &evsel->core.attr; |
249d98e5 ACM |
777 | /* callgraph default */ |
778 | struct callchain_param param = { | |
779 | .record_mode = callchain_param.record_mode, | |
780 | }; | |
d457c963 | 781 | u32 dump_size = 0; |
792d48b4 ACM |
782 | int max_stack = 0; |
783 | const char *callgraph_buf = NULL; | |
d457c963 | 784 | |
930a2e29 JO |
785 | list_for_each_entry(term, config_terms, list) { |
786 | switch (term->type) { | |
ee4c7588 | 787 | case PERF_EVSEL__CONFIG_TERM_PERIOD: |
c2f1cead AK |
788 | if (!(term->weak && opts->user_interval != ULLONG_MAX)) { |
789 | attr->sample_period = term->val.period; | |
790 | attr->freq = 0; | |
862b2f8f | 791 | evsel__reset_sample_bit(evsel, PERIOD); |
c2f1cead | 792 | } |
32067712 | 793 | break; |
09af2a55 | 794 | case PERF_EVSEL__CONFIG_TERM_FREQ: |
c2f1cead AK |
795 | if (!(term->weak && opts->user_freq != UINT_MAX)) { |
796 | attr->sample_freq = term->val.freq; | |
797 | attr->freq = 1; | |
862b2f8f | 798 | evsel__set_sample_bit(evsel, PERIOD); |
c2f1cead | 799 | } |
09af2a55 | 800 | break; |
32067712 KL |
801 | case PERF_EVSEL__CONFIG_TERM_TIME: |
802 | if (term->val.time) | |
862b2f8f | 803 | evsel__set_sample_bit(evsel, TIME); |
32067712 | 804 | else |
862b2f8f | 805 | evsel__reset_sample_bit(evsel, TIME); |
32067712 | 806 | break; |
d457c963 | 807 | case PERF_EVSEL__CONFIG_TERM_CALLGRAPH: |
e884602b | 808 | callgraph_buf = term->val.str; |
d457c963 | 809 | break; |
ac12f676 | 810 | case PERF_EVSEL__CONFIG_TERM_BRANCH: |
e884602b | 811 | if (term->val.str && strcmp(term->val.str, "no")) { |
862b2f8f | 812 | evsel__set_sample_bit(evsel, BRANCH_STACK); |
e884602b | 813 | parse_branch_str(term->val.str, |
ac12f676 AK |
814 | &attr->branch_sample_type); |
815 | } else | |
862b2f8f | 816 | evsel__reset_sample_bit(evsel, BRANCH_STACK); |
ac12f676 | 817 | break; |
d457c963 KL |
818 | case PERF_EVSEL__CONFIG_TERM_STACK_USER: |
819 | dump_size = term->val.stack_user; | |
820 | break; | |
792d48b4 ACM |
821 | case PERF_EVSEL__CONFIG_TERM_MAX_STACK: |
822 | max_stack = term->val.max_stack; | |
823 | break; | |
2fda5ada ACM |
824 | case PERF_EVSEL__CONFIG_TERM_MAX_EVENTS: |
825 | evsel->max_events = term->val.max_events; | |
826 | break; | |
374ce938 WN |
827 | case PERF_EVSEL__CONFIG_TERM_INHERIT: |
828 | /* | |
829 | * attr->inherit should has already been set by | |
6ec17b4e | 830 | * evsel__config. If user explicitly set |
374ce938 WN |
831 | * inherit using config terms, override global |
832 | * opt->no_inherit setting. | |
833 | */ | |
834 | attr->inherit = term->val.inherit ? 1 : 0; | |
835 | break; | |
626a6b78 WN |
836 | case PERF_EVSEL__CONFIG_TERM_OVERWRITE: |
837 | attr->write_backward = term->val.overwrite ? 1 : 0; | |
838 | break; | |
d0565132 | 839 | case PERF_EVSEL__CONFIG_TERM_DRV_CFG: |
2178790b | 840 | break; |
064b4e82 JY |
841 | case PERF_EVSEL__CONFIG_TERM_PERCORE: |
842 | break; | |
1b992154 AH |
843 | case PERF_EVSEL__CONFIG_TERM_AUX_OUTPUT: |
844 | attr->aux_output = term->val.aux_output ? 1 : 0; | |
845 | break; | |
eb7a52d4 AH |
846 | case PERF_EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE: |
847 | /* Already applied by auxtrace */ | |
848 | break; | |
a1ac7de6 AH |
849 | case PERF_EVSEL__CONFIG_TERM_CFG_CHG: |
850 | break; | |
930a2e29 JO |
851 | default: |
852 | break; | |
853 | } | |
854 | } | |
d457c963 KL |
855 | |
856 | /* User explicitly set per-event callgraph, clear the old setting and reset. */ | |
792d48b4 | 857 | if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) { |
0d3dcc0e ACM |
858 | bool sample_address = false; |
859 | ||
792d48b4 ACM |
860 | if (max_stack) { |
861 | param.max_stack = max_stack; | |
862 | if (callgraph_buf == NULL) | |
863 | callgraph_buf = "fp"; | |
864 | } | |
d457c963 KL |
865 | |
866 | /* parse callgraph parameters */ | |
867 | if (callgraph_buf != NULL) { | |
f9db0d0f KL |
868 | if (!strcmp(callgraph_buf, "no")) { |
869 | param.enabled = false; | |
870 | param.record_mode = CALLCHAIN_NONE; | |
871 | } else { | |
872 | param.enabled = true; | |
873 | if (parse_callchain_record(callgraph_buf, ¶m)) { | |
874 | pr_err("per-event callgraph setting for %s failed. " | |
875 | "Apply callgraph global setting for it\n", | |
876 | evsel->name); | |
877 | return; | |
878 | } | |
0d3dcc0e ACM |
879 | if (param.record_mode == CALLCHAIN_DWARF) |
880 | sample_address = true; | |
d457c963 KL |
881 | } |
882 | } | |
883 | if (dump_size > 0) { | |
884 | dump_size = round_up(dump_size, sizeof(u64)); | |
885 | param.dump_size = dump_size; | |
886 | } | |
887 | ||
888 | /* If global callgraph set, clear it */ | |
889 | if (callchain_param.enabled) | |
890 | perf_evsel__reset_callgraph(evsel, &callchain_param); | |
891 | ||
892 | /* set perf-event callgraph */ | |
0d3dcc0e ACM |
893 | if (param.enabled) { |
894 | if (sample_address) { | |
862b2f8f ACM |
895 | evsel__set_sample_bit(evsel, ADDR); |
896 | evsel__set_sample_bit(evsel, DATA_SRC); | |
1fc632ce | 897 | evsel->core.attr.mmap_data = track; |
0d3dcc0e | 898 | } |
6ec17b4e | 899 | evsel__config_callchain(evsel, opts, ¶m); |
0d3dcc0e | 900 | } |
d457c963 | 901 | } |
930a2e29 JO |
902 | } |
903 | ||
32dcd021 | 904 | static bool is_dummy_event(struct evsel *evsel) |
95035c5e | 905 | { |
1fc632ce JO |
906 | return (evsel->core.attr.type == PERF_TYPE_SOFTWARE) && |
907 | (evsel->core.attr.config == PERF_COUNT_SW_DUMMY); | |
95035c5e KL |
908 | } |
909 | ||
eb7a52d4 AH |
910 | struct perf_evsel_config_term *__perf_evsel__get_config_term(struct evsel *evsel, |
911 | enum evsel_term_type type) | |
912 | { | |
913 | struct perf_evsel_config_term *term, *found_term = NULL; | |
914 | ||
915 | list_for_each_entry(term, &evsel->config_terms, list) { | |
916 | if (term->type == type) | |
917 | found_term = term; | |
918 | } | |
919 | ||
920 | return found_term; | |
921 | } | |
922 | ||
774cb499 JO |
923 | /* |
924 | * The enable_on_exec/disabled value strategy: | |
925 | * | |
926 | * 1) For any type of traced program: | |
927 | * - all independent events and group leaders are disabled | |
928 | * - all group members are enabled | |
929 | * | |
930 | * Group members are ruled by group leaders. They need to | |
931 | * be enabled, because the group scheduling relies on that. | |
932 | * | |
933 | * 2) For traced programs executed by perf: | |
934 | * - all independent events and group leaders have | |
935 | * enable_on_exec set | |
936 | * - we don't specifically enable or disable any event during | |
937 | * the record command | |
938 | * | |
939 | * Independent events and group leaders are initially disabled | |
940 | * and get enabled by exec. Group members are ruled by group | |
941 | * leaders as stated in 1). | |
942 | * | |
943 | * 3) For traced programs attached by perf (pid/tid): | |
944 | * - we specifically enable or disable all events during | |
945 | * the record command | |
946 | * | |
947 | * When attaching events to already running traced we | |
948 | * enable/disable events specifically, as there's no | |
949 | * initial traced exec call. | |
950 | */ | |
6ec17b4e ACM |
951 | void evsel__config(struct evsel *evsel, struct record_opts *opts, |
952 | struct callchain_param *callchain) | |
0f82ebc4 | 953 | { |
32dcd021 | 954 | struct evsel *leader = evsel->leader; |
1fc632ce | 955 | struct perf_event_attr *attr = &evsel->core.attr; |
60b0896c | 956 | int track = evsel->tracking; |
3aa5939d | 957 | bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread; |
0f82ebc4 | 958 | |
594ac61a | 959 | attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; |
0f82ebc4 | 960 | attr->inherit = !opts->no_inherit; |
626a6b78 | 961 | attr->write_backward = opts->overwrite ? 1 : 0; |
0f82ebc4 | 962 | |
862b2f8f ACM |
963 | evsel__set_sample_bit(evsel, IP); |
964 | evsel__set_sample_bit(evsel, TID); | |
0f82ebc4 | 965 | |
3c176311 | 966 | if (evsel->sample_read) { |
862b2f8f | 967 | evsel__set_sample_bit(evsel, READ); |
3c176311 JO |
968 | |
969 | /* | |
970 | * We need ID even in case of single event, because | |
971 | * PERF_SAMPLE_READ process ID specific data. | |
972 | */ | |
862b2f8f | 973 | evsel__set_sample_id(evsel, false); |
3c176311 JO |
974 | |
975 | /* | |
976 | * Apply group format only if we belong to group | |
977 | * with more than one members. | |
978 | */ | |
5643b1a5 | 979 | if (leader->core.nr_members > 1) { |
3c176311 JO |
980 | attr->read_format |= PERF_FORMAT_GROUP; |
981 | attr->inherit = 0; | |
982 | } | |
983 | } | |
984 | ||
0f82ebc4 | 985 | /* |
17314e23 | 986 | * We default some events to have a default interval. But keep |
0f82ebc4 ACM |
987 | * it a weak assumption overridable by the user. |
988 | */ | |
17314e23 | 989 | if (!attr->sample_period || (opts->user_freq != UINT_MAX || |
0f82ebc4 ACM |
990 | opts->user_interval != ULLONG_MAX)) { |
991 | if (opts->freq) { | |
862b2f8f | 992 | evsel__set_sample_bit(evsel, PERIOD); |
0f82ebc4 ACM |
993 | attr->freq = 1; |
994 | attr->sample_freq = opts->freq; | |
995 | } else { | |
996 | attr->sample_period = opts->default_interval; | |
997 | } | |
998 | } | |
999 | ||
1000 | if (opts->no_samples) | |
1001 | attr->sample_freq = 0; | |
1002 | ||
a17f0697 | 1003 | if (opts->inherit_stat) { |
1fc632ce | 1004 | evsel->core.attr.read_format |= |
a17f0697 JO |
1005 | PERF_FORMAT_TOTAL_TIME_ENABLED | |
1006 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
1007 | PERF_FORMAT_ID; | |
0f82ebc4 | 1008 | attr->inherit_stat = 1; |
a17f0697 | 1009 | } |
0f82ebc4 ACM |
1010 | |
1011 | if (opts->sample_address) { | |
862b2f8f | 1012 | evsel__set_sample_bit(evsel, ADDR); |
0f82ebc4 ACM |
1013 | attr->mmap_data = track; |
1014 | } | |
1015 | ||
f140373b JO |
1016 | /* |
1017 | * We don't allow user space callchains for function trace | |
1018 | * event, due to issues with page faults while tracing page | |
1019 | * fault handler and its overall trickiness nature. | |
1020 | */ | |
c754c382 | 1021 | if (evsel__is_function_event(evsel)) |
1fc632ce | 1022 | evsel->core.attr.exclude_callchain_user = 1; |
f140373b | 1023 | |
e68ae9cf | 1024 | if (callchain && callchain->enabled && !evsel->no_aux_samples) |
6ec17b4e | 1025 | evsel__config_callchain(evsel, opts, callchain); |
26d33022 | 1026 | |
6a21c0b5 | 1027 | if (opts->sample_intr_regs) { |
bcc84ec6 | 1028 | attr->sample_regs_intr = opts->sample_intr_regs; |
862b2f8f | 1029 | evsel__set_sample_bit(evsel, REGS_INTR); |
6a21c0b5 SE |
1030 | } |
1031 | ||
84c41742 AK |
1032 | if (opts->sample_user_regs) { |
1033 | attr->sample_regs_user |= opts->sample_user_regs; | |
862b2f8f | 1034 | evsel__set_sample_bit(evsel, REGS_USER); |
84c41742 AK |
1035 | } |
1036 | ||
b6f35ed7 | 1037 | if (target__has_cpu(&opts->target) || opts->sample_cpu) |
862b2f8f | 1038 | evsel__set_sample_bit(evsel, CPU); |
0f82ebc4 | 1039 | |
8affc2b8 | 1040 | /* |
bd1a0be5 | 1041 | * When the user explicitly disabled time don't force it here. |
8affc2b8 AK |
1042 | */ |
1043 | if (opts->sample_time && | |
1044 | (!perf_missing_features.sample_id_all && | |
3abebc55 AH |
1045 | (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu || |
1046 | opts->sample_time_set))) | |
862b2f8f | 1047 | evsel__set_sample_bit(evsel, TIME); |
0f82ebc4 | 1048 | |
6ff1ce76 | 1049 | if (opts->raw_samples && !evsel->no_aux_samples) { |
862b2f8f ACM |
1050 | evsel__set_sample_bit(evsel, TIME); |
1051 | evsel__set_sample_bit(evsel, RAW); | |
1052 | evsel__set_sample_bit(evsel, CPU); | |
0f82ebc4 ACM |
1053 | } |
1054 | ||
ccf49bfc | 1055 | if (opts->sample_address) |
862b2f8f | 1056 | evsel__set_sample_bit(evsel, DATA_SRC); |
ccf49bfc | 1057 | |
3b0a5daa | 1058 | if (opts->sample_phys_addr) |
862b2f8f | 1059 | evsel__set_sample_bit(evsel, PHYS_ADDR); |
3b0a5daa | 1060 | |
509051ea | 1061 | if (opts->no_buffering) { |
0f82ebc4 ACM |
1062 | attr->watermark = 0; |
1063 | attr->wakeup_events = 1; | |
1064 | } | |
6ff1ce76 | 1065 | if (opts->branch_stack && !evsel->no_aux_samples) { |
862b2f8f | 1066 | evsel__set_sample_bit(evsel, BRANCH_STACK); |
bdfebd84 RAV |
1067 | attr->branch_sample_type = opts->branch_stack; |
1068 | } | |
0f82ebc4 | 1069 | |
05484298 | 1070 | if (opts->sample_weight) |
862b2f8f | 1071 | evsel__set_sample_bit(evsel, WEIGHT); |
05484298 | 1072 | |
62e503b7 | 1073 | attr->task = track; |
5c5e854b | 1074 | attr->mmap = track; |
a5a5ba72 | 1075 | attr->mmap2 = track && !perf_missing_features.mmap2; |
5c5e854b | 1076 | attr->comm = track; |
9aa0bfa3 | 1077 | attr->ksymbol = track && !perf_missing_features.ksymbol; |
74a1e863 | 1078 | attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf; |
0f82ebc4 | 1079 | |
f3b3614a HB |
1080 | if (opts->record_namespaces) |
1081 | attr->namespaces = track; | |
1082 | ||
8fb4b679 NK |
1083 | if (opts->record_cgroup) { |
1084 | attr->cgroup = track && !perf_missing_features.cgroup; | |
862b2f8f | 1085 | evsel__set_sample_bit(evsel, CGROUP); |
8fb4b679 NK |
1086 | } |
1087 | ||
b757bb09 AH |
1088 | if (opts->record_switch_events) |
1089 | attr->context_switch = track; | |
1090 | ||
475eeab9 | 1091 | if (opts->sample_transaction) |
862b2f8f | 1092 | evsel__set_sample_bit(evsel, TRANSACTION); |
475eeab9 | 1093 | |
85c273d2 | 1094 | if (opts->running_time) { |
1fc632ce | 1095 | evsel->core.attr.read_format |= |
85c273d2 AK |
1096 | PERF_FORMAT_TOTAL_TIME_ENABLED | |
1097 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
1098 | } | |
1099 | ||
774cb499 JO |
1100 | /* |
1101 | * XXX see the function comment above | |
1102 | * | |
1103 | * Disabling only independent events or group leaders, | |
1104 | * keeping group members enabled. | |
1105 | */ | |
c754c382 | 1106 | if (evsel__is_group_leader(evsel)) |
774cb499 JO |
1107 | attr->disabled = 1; |
1108 | ||
1109 | /* | |
1110 | * Setting enable_on_exec for independent events and | |
1111 | * group leaders for traced executed by perf. | |
1112 | */ | |
c754c382 ACM |
1113 | if (target__none(&opts->target) && evsel__is_group_leader(evsel) && |
1114 | !opts->initial_delay) | |
0f82ebc4 | 1115 | attr->enable_on_exec = 1; |
2afd2bcf AH |
1116 | |
1117 | if (evsel->immediate) { | |
1118 | attr->disabled = 0; | |
1119 | attr->enable_on_exec = 0; | |
1120 | } | |
814c8c38 PZ |
1121 | |
1122 | clockid = opts->clockid; | |
1123 | if (opts->use_clockid) { | |
1124 | attr->use_clockid = 1; | |
1125 | attr->clockid = opts->clockid; | |
1126 | } | |
930a2e29 | 1127 | |
7f94af7a | 1128 | if (evsel->precise_max) |
4e8a5c15 | 1129 | attr->precise_ip = 3; |
7f94af7a | 1130 | |
85723885 JO |
1131 | if (opts->all_user) { |
1132 | attr->exclude_kernel = 1; | |
1133 | attr->exclude_user = 0; | |
1134 | } | |
1135 | ||
1136 | if (opts->all_kernel) { | |
1137 | attr->exclude_kernel = 0; | |
1138 | attr->exclude_user = 1; | |
1139 | } | |
1140 | ||
fe1f61b3 | 1141 | if (evsel->core.own_cpus || evsel->unit) |
1fc632ce | 1142 | evsel->core.attr.read_format |= PERF_FORMAT_ID; |
4ab8455f | 1143 | |
930a2e29 JO |
1144 | /* |
1145 | * Apply event specific term settings, | |
1146 | * it overloads any global configuration. | |
1147 | */ | |
0d3dcc0e | 1148 | apply_config_terms(evsel, opts, track); |
a359c17a JO |
1149 | |
1150 | evsel->ignore_missing_thread = opts->ignore_missing_thread; | |
f290aa1f JO |
1151 | |
1152 | /* The --period option takes the precedence. */ | |
1153 | if (opts->period_set) { | |
1154 | if (opts->period) | |
862b2f8f | 1155 | evsel__set_sample_bit(evsel, PERIOD); |
f290aa1f | 1156 | else |
862b2f8f | 1157 | evsel__reset_sample_bit(evsel, PERIOD); |
f290aa1f | 1158 | } |
95035c5e KL |
1159 | |
1160 | /* | |
1161 | * For initial_delay, a dummy event is added implicitly. | |
1162 | * The software event will trigger -EOPNOTSUPP error out, | |
1163 | * if BRANCH_STACK bit is set. | |
1164 | */ | |
1165 | if (opts->initial_delay && is_dummy_event(evsel)) | |
862b2f8f | 1166 | evsel__reset_sample_bit(evsel, BRANCH_STACK); |
0f82ebc4 ACM |
1167 | } |
1168 | ||
ad681adf | 1169 | int evsel__set_filter(struct evsel *evsel, const char *filter) |
12467ae4 ACM |
1170 | { |
1171 | char *new_filter = strdup(filter); | |
1172 | ||
1173 | if (new_filter != NULL) { | |
1174 | free(evsel->filter); | |
1175 | evsel->filter = new_filter; | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | return -1; | |
1180 | } | |
1181 | ||
ad681adf | 1182 | static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter) |
64ec84f5 ACM |
1183 | { |
1184 | char *new_filter; | |
1185 | ||
1186 | if (evsel->filter == NULL) | |
ad681adf | 1187 | return evsel__set_filter(evsel, filter); |
64ec84f5 | 1188 | |
b15d0a4c | 1189 | if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) { |
64ec84f5 ACM |
1190 | free(evsel->filter); |
1191 | evsel->filter = new_filter; | |
1192 | return 0; | |
1193 | } | |
1194 | ||
1195 | return -1; | |
1196 | } | |
1197 | ||
ad681adf | 1198 | int evsel__append_tp_filter(struct evsel *evsel, const char *filter) |
3541c034 | 1199 | { |
ad681adf | 1200 | return evsel__append_filter(evsel, "(%s) && (%s)", filter); |
3541c034 MP |
1201 | } |
1202 | ||
ad681adf | 1203 | int evsel__append_addr_filter(struct evsel *evsel, const char *filter) |
1e857484 | 1204 | { |
ad681adf | 1205 | return evsel__append_filter(evsel, "%s,%s", filter); |
1e857484 MP |
1206 | } |
1207 | ||
363fb121 AK |
1208 | /* Caller has to clear disabled after going through all CPUs. */ |
1209 | int evsel__enable_cpu(struct evsel *evsel, int cpu) | |
1210 | { | |
1211 | return perf_evsel__enable_cpu(&evsel->core, cpu); | |
1212 | } | |
1213 | ||
ec7f24ef | 1214 | int evsel__enable(struct evsel *evsel) |
e2407bef | 1215 | { |
a00571fd | 1216 | int err = perf_evsel__enable(&evsel->core); |
b7e8452b ACM |
1217 | |
1218 | if (!err) | |
1219 | evsel->disabled = false; | |
b7e8452b | 1220 | return err; |
e2407bef AK |
1221 | } |
1222 | ||
363fb121 AK |
1223 | /* Caller has to set disabled after going through all CPUs. */ |
1224 | int evsel__disable_cpu(struct evsel *evsel, int cpu) | |
1225 | { | |
1226 | return perf_evsel__disable_cpu(&evsel->core, cpu); | |
1227 | } | |
1228 | ||
9a10bb22 | 1229 | int evsel__disable(struct evsel *evsel) |
e98a4cbb | 1230 | { |
a00571fd | 1231 | int err = perf_evsel__disable(&evsel->core); |
b7e8452b ACM |
1232 | /* |
1233 | * We mark it disabled here so that tools that disable a event can | |
1234 | * ignore events after they disable it. I.e. the ring buffer may have | |
1235 | * already a few more events queued up before the kernel got the stop | |
1236 | * request. | |
1237 | */ | |
1238 | if (!err) | |
1239 | evsel->disabled = true; | |
1240 | ||
1241 | return err; | |
e98a4cbb JO |
1242 | } |
1243 | ||
32dcd021 | 1244 | static void perf_evsel__free_config_terms(struct evsel *evsel) |
930a2e29 JO |
1245 | { |
1246 | struct perf_evsel_config_term *term, *h; | |
1247 | ||
1248 | list_for_each_entry_safe(term, h, &evsel->config_terms, list) { | |
e56fbc9d | 1249 | list_del_init(&term->list); |
3220fb8d LY |
1250 | if (term->free_str) |
1251 | zfree(&term->val.str); | |
930a2e29 JO |
1252 | free(term); |
1253 | } | |
1254 | } | |
1255 | ||
30f7c591 | 1256 | void evsel__exit(struct evsel *evsel) |
69aad6f1 | 1257 | { |
b27c4ece | 1258 | assert(list_empty(&evsel->core.node)); |
d49e4695 | 1259 | assert(evsel->evlist == NULL); |
42dfa451 | 1260 | perf_evsel__free_counts(evsel); |
88761fa1 | 1261 | perf_evsel__free_fd(&evsel->core); |
70c20369 | 1262 | perf_evsel__free_id(&evsel->core); |
930a2e29 | 1263 | perf_evsel__free_config_terms(evsel); |
a53b6460 | 1264 | cgroup__put(evsel->cgrp); |
d400bd3a | 1265 | perf_cpu_map__put(evsel->core.cpus); |
fe1f61b3 | 1266 | perf_cpu_map__put(evsel->core.own_cpus); |
af663bd0 | 1267 | perf_thread_map__put(evsel->core.threads); |
597e48c1 | 1268 | zfree(&evsel->group_name); |
597e48c1 | 1269 | zfree(&evsel->name); |
d4953f7e | 1270 | zfree(&evsel->pmu_name); |
ce8ccff5 | 1271 | perf_evsel__object.fini(evsel); |
ef1d1af2 ACM |
1272 | } |
1273 | ||
5eb2dd2a | 1274 | void evsel__delete(struct evsel *evsel) |
ef1d1af2 | 1275 | { |
30f7c591 | 1276 | evsel__exit(evsel); |
69aad6f1 ACM |
1277 | free(evsel); |
1278 | } | |
c52b12ed | 1279 | |
12f5261d ACM |
1280 | void evsel__compute_deltas(struct evsel *evsel, int cpu, int thread, |
1281 | struct perf_counts_values *count) | |
c7a79c47 SE |
1282 | { |
1283 | struct perf_counts_values tmp; | |
1284 | ||
1285 | if (!evsel->prev_raw_counts) | |
1286 | return; | |
1287 | ||
1288 | if (cpu == -1) { | |
1289 | tmp = evsel->prev_raw_counts->aggr; | |
1290 | evsel->prev_raw_counts->aggr = *count; | |
1291 | } else { | |
a6fa0038 JO |
1292 | tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread); |
1293 | *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count; | |
c7a79c47 SE |
1294 | } |
1295 | ||
1296 | count->val = count->val - tmp.val; | |
1297 | count->ena = count->ena - tmp.ena; | |
1298 | count->run = count->run - tmp.run; | |
1299 | } | |
1300 | ||
13112bbf JO |
1301 | void perf_counts_values__scale(struct perf_counts_values *count, |
1302 | bool scale, s8 *pscaled) | |
1303 | { | |
1304 | s8 scaled = 0; | |
1305 | ||
1306 | if (scale) { | |
1307 | if (count->run == 0) { | |
1308 | scaled = -1; | |
1309 | count->val = 0; | |
1310 | } else if (count->run < count->ena) { | |
1311 | scaled = 1; | |
42a5864c | 1312 | count->val = (u64)((double) count->val * count->ena / count->run); |
13112bbf | 1313 | } |
75998bb2 | 1314 | } |
13112bbf JO |
1315 | |
1316 | if (pscaled) | |
1317 | *pscaled = scaled; | |
1318 | } | |
1319 | ||
ea089692 | 1320 | static int evsel__read_one(struct evsel *evsel, int cpu, int thread) |
f7794d52 JO |
1321 | { |
1322 | struct perf_counts_values *count = perf_counts(evsel->counts, cpu, thread); | |
1323 | ||
5c30af92 | 1324 | return perf_evsel__read(&evsel->core, cpu, thread, count); |
f7794d52 JO |
1325 | } |
1326 | ||
1327 | static void | |
32dcd021 | 1328 | perf_evsel__set_count(struct evsel *counter, int cpu, int thread, |
f7794d52 JO |
1329 | u64 val, u64 ena, u64 run) |
1330 | { | |
1331 | struct perf_counts_values *count; | |
1332 | ||
1333 | count = perf_counts(counter->counts, cpu, thread); | |
1334 | ||
1335 | count->val = val; | |
1336 | count->ena = ena; | |
1337 | count->run = run; | |
df1d6856 JO |
1338 | |
1339 | perf_counts__set_loaded(counter->counts, cpu, thread, true); | |
f7794d52 JO |
1340 | } |
1341 | ||
1342 | static int | |
32dcd021 | 1343 | perf_evsel__process_group_data(struct evsel *leader, |
f7794d52 JO |
1344 | int cpu, int thread, u64 *data) |
1345 | { | |
1fc632ce | 1346 | u64 read_format = leader->core.attr.read_format; |
f7794d52 JO |
1347 | struct sample_read_value *v; |
1348 | u64 nr, ena = 0, run = 0, i; | |
1349 | ||
1350 | nr = *data++; | |
1351 | ||
5643b1a5 | 1352 | if (nr != (u64) leader->core.nr_members) |
f7794d52 JO |
1353 | return -EINVAL; |
1354 | ||
1355 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
1356 | ena = *data++; | |
1357 | ||
1358 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
1359 | run = *data++; | |
1360 | ||
1361 | v = (struct sample_read_value *) data; | |
1362 | ||
1363 | perf_evsel__set_count(leader, cpu, thread, | |
1364 | v[0].value, ena, run); | |
1365 | ||
1366 | for (i = 1; i < nr; i++) { | |
32dcd021 | 1367 | struct evsel *counter; |
f7794d52 JO |
1368 | |
1369 | counter = perf_evlist__id2evsel(leader->evlist, v[i].id); | |
1370 | if (!counter) | |
1371 | return -EINVAL; | |
1372 | ||
1373 | perf_evsel__set_count(counter, cpu, thread, | |
1374 | v[i].value, ena, run); | |
1375 | } | |
1376 | ||
1377 | return 0; | |
1378 | } | |
1379 | ||
ea089692 | 1380 | static int evsel__read_group(struct evsel *leader, int cpu, int thread) |
f7794d52 | 1381 | { |
82806c3a | 1382 | struct perf_stat_evsel *ps = leader->stats; |
1fc632ce | 1383 | u64 read_format = leader->core.attr.read_format; |
5c30af92 | 1384 | int size = perf_evsel__read_size(&leader->core); |
f7794d52 JO |
1385 | u64 *data = ps->group_data; |
1386 | ||
1387 | if (!(read_format & PERF_FORMAT_ID)) | |
1388 | return -EINVAL; | |
1389 | ||
c754c382 | 1390 | if (!evsel__is_group_leader(leader)) |
f7794d52 JO |
1391 | return -EINVAL; |
1392 | ||
1393 | if (!data) { | |
1394 | data = zalloc(size); | |
1395 | if (!data) | |
1396 | return -ENOMEM; | |
1397 | ||
1398 | ps->group_data = data; | |
1399 | } | |
1400 | ||
1401 | if (FD(leader, cpu, thread) < 0) | |
1402 | return -EINVAL; | |
1403 | ||
1404 | if (readn(FD(leader, cpu, thread), data, size) <= 0) | |
1405 | return -errno; | |
1406 | ||
1407 | return perf_evsel__process_group_data(leader, cpu, thread, data); | |
1408 | } | |
1409 | ||
ea089692 | 1410 | int evsel__read_counter(struct evsel *evsel, int cpu, int thread) |
f7794d52 | 1411 | { |
1fc632ce | 1412 | u64 read_format = evsel->core.attr.read_format; |
f7794d52 JO |
1413 | |
1414 | if (read_format & PERF_FORMAT_GROUP) | |
ea089692 ACM |
1415 | return evsel__read_group(evsel, cpu, thread); |
1416 | ||
1417 | return evsel__read_one(evsel, cpu, thread); | |
f7794d52 JO |
1418 | } |
1419 | ||
ea089692 | 1420 | int __evsel__read_on_cpu(struct evsel *evsel, int cpu, int thread, bool scale) |
c52b12ed ACM |
1421 | { |
1422 | struct perf_counts_values count; | |
1423 | size_t nv = scale ? 3 : 1; | |
1424 | ||
1425 | if (FD(evsel, cpu, thread) < 0) | |
1426 | return -EINVAL; | |
1427 | ||
a6fa0038 | 1428 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0) |
4eed11d5 ACM |
1429 | return -ENOMEM; |
1430 | ||
db49a717 | 1431 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) <= 0) |
c52b12ed ACM |
1432 | return -errno; |
1433 | ||
12f5261d | 1434 | evsel__compute_deltas(evsel, cpu, thread, &count); |
13112bbf | 1435 | perf_counts_values__scale(&count, scale, NULL); |
a6fa0038 | 1436 | *perf_counts(evsel->counts, cpu, thread) = count; |
c52b12ed ACM |
1437 | return 0; |
1438 | } | |
1439 | ||
32dcd021 | 1440 | static int get_group_fd(struct evsel *evsel, int cpu, int thread) |
6a4bb04c | 1441 | { |
32dcd021 | 1442 | struct evsel *leader = evsel->leader; |
6a4bb04c JO |
1443 | int fd; |
1444 | ||
c754c382 | 1445 | if (evsel__is_group_leader(evsel)) |
6a4bb04c JO |
1446 | return -1; |
1447 | ||
1448 | /* | |
1449 | * Leader must be already processed/open, | |
1450 | * if not it's a bug. | |
1451 | */ | |
9dfcb759 | 1452 | BUG_ON(!leader->core.fd); |
6a4bb04c JO |
1453 | |
1454 | fd = FD(leader, cpu, thread); | |
1455 | BUG_ON(fd == -1); | |
1456 | ||
1457 | return fd; | |
1458 | } | |
1459 | ||
32dcd021 | 1460 | static void perf_evsel__remove_fd(struct evsel *pos, |
ca800068 MZ |
1461 | int nr_cpus, int nr_threads, |
1462 | int thread_idx) | |
1463 | { | |
1464 | for (int cpu = 0; cpu < nr_cpus; cpu++) | |
1465 | for (int thread = thread_idx; thread < nr_threads - 1; thread++) | |
1466 | FD(pos, cpu, thread) = FD(pos, cpu, thread + 1); | |
1467 | } | |
1468 | ||
32dcd021 | 1469 | static int update_fds(struct evsel *evsel, |
ca800068 MZ |
1470 | int nr_cpus, int cpu_idx, |
1471 | int nr_threads, int thread_idx) | |
1472 | { | |
32dcd021 | 1473 | struct evsel *pos; |
ca800068 MZ |
1474 | |
1475 | if (cpu_idx >= nr_cpus || thread_idx >= nr_threads) | |
1476 | return -EINVAL; | |
1477 | ||
1478 | evlist__for_each_entry(evsel->evlist, pos) { | |
1479 | nr_cpus = pos != evsel ? nr_cpus : cpu_idx; | |
1480 | ||
1481 | perf_evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx); | |
1482 | ||
1483 | /* | |
1484 | * Since fds for next evsel has not been created, | |
1485 | * there is no need to iterate whole event list. | |
1486 | */ | |
1487 | if (pos == evsel) | |
1488 | break; | |
1489 | } | |
1490 | return 0; | |
1491 | } | |
1492 | ||
32dcd021 | 1493 | static bool ignore_missing_thread(struct evsel *evsel, |
ca800068 | 1494 | int nr_cpus, int cpu, |
9749b90e | 1495 | struct perf_thread_map *threads, |
a359c17a JO |
1496 | int thread, int err) |
1497 | { | |
a2f354e3 | 1498 | pid_t ignore_pid = perf_thread_map__pid(threads, thread); |
ca800068 | 1499 | |
a359c17a JO |
1500 | if (!evsel->ignore_missing_thread) |
1501 | return false; | |
1502 | ||
1503 | /* The system wide setup does not work with threads. */ | |
648b5af3 | 1504 | if (evsel->core.system_wide) |
a359c17a JO |
1505 | return false; |
1506 | ||
1507 | /* The -ESRCH is perf event syscall errno for pid's not found. */ | |
1508 | if (err != -ESRCH) | |
1509 | return false; | |
1510 | ||
1511 | /* If there's only one thread, let it fail. */ | |
1512 | if (threads->nr == 1) | |
1513 | return false; | |
1514 | ||
ca800068 MZ |
1515 | /* |
1516 | * We should remove fd for missing_thread first | |
1517 | * because thread_map__remove() will decrease threads->nr. | |
1518 | */ | |
1519 | if (update_fds(evsel, nr_cpus, cpu, threads->nr, thread)) | |
1520 | return false; | |
1521 | ||
a359c17a JO |
1522 | if (thread_map__remove(threads, thread)) |
1523 | return false; | |
1524 | ||
1525 | pr_warning("WARNING: Ignored open failure for pid %d\n", | |
ca800068 | 1526 | ignore_pid); |
a359c17a JO |
1527 | return true; |
1528 | } | |
1529 | ||
ca125277 ACM |
1530 | static int __open_attr__fprintf(FILE *fp, const char *name, const char *val, |
1531 | void *priv __maybe_unused) | |
1532 | { | |
1533 | return fprintf(fp, " %-32s %s\n", name, val); | |
1534 | } | |
1535 | ||
4e8a5c15 JO |
1536 | static void display_attr(struct perf_event_attr *attr) |
1537 | { | |
ccd26741 | 1538 | if (verbose >= 2 || debug_peo_args) { |
4e8a5c15 JO |
1539 | fprintf(stderr, "%.60s\n", graph_dotted_line); |
1540 | fprintf(stderr, "perf_event_attr:\n"); | |
1541 | perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL); | |
1542 | fprintf(stderr, "%.60s\n", graph_dotted_line); | |
1543 | } | |
1544 | } | |
1545 | ||
32dcd021 | 1546 | static int perf_event_open(struct evsel *evsel, |
4e8a5c15 JO |
1547 | pid_t pid, int cpu, int group_fd, |
1548 | unsigned long flags) | |
1549 | { | |
1fc632ce | 1550 | int precise_ip = evsel->core.attr.precise_ip; |
4e8a5c15 JO |
1551 | int fd; |
1552 | ||
1553 | while (1) { | |
ccd26741 | 1554 | pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx", |
4e8a5c15 JO |
1555 | pid, cpu, group_fd, flags); |
1556 | ||
1fc632ce | 1557 | fd = sys_perf_event_open(&evsel->core.attr, pid, cpu, group_fd, flags); |
4e8a5c15 JO |
1558 | if (fd >= 0) |
1559 | break; | |
1560 | ||
cd136189 JO |
1561 | /* Do not try less precise if not requested. */ |
1562 | if (!evsel->precise_max) | |
4e8a5c15 JO |
1563 | break; |
1564 | ||
1565 | /* | |
1566 | * We tried all the precise_ip values, and it's | |
1567 | * still failing, so leave it to standard fallback. | |
1568 | */ | |
1fc632ce JO |
1569 | if (!evsel->core.attr.precise_ip) { |
1570 | evsel->core.attr.precise_ip = precise_ip; | |
4e8a5c15 JO |
1571 | break; |
1572 | } | |
1573 | ||
ccd26741 | 1574 | pr_debug2_peo("\nsys_perf_event_open failed, error %d\n", -ENOTSUP); |
1fc632ce | 1575 | evsel->core.attr.precise_ip--; |
ccd26741 | 1576 | pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip); |
1fc632ce | 1577 | display_attr(&evsel->core.attr); |
4e8a5c15 JO |
1578 | } |
1579 | ||
1580 | return fd; | |
1581 | } | |
1582 | ||
4804e011 AK |
1583 | static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, |
1584 | struct perf_thread_map *threads, | |
1585 | int start_cpu, int end_cpu) | |
48290609 | 1586 | { |
bf8e8f4b | 1587 | int cpu, thread, nthreads; |
57480d2c | 1588 | unsigned long flags = PERF_FLAG_FD_CLOEXEC; |
796c01a4 | 1589 | int pid = -1, err, old_errno; |
bec19672 | 1590 | enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE; |
48290609 | 1591 | |
acb9f2d4 ACM |
1592 | if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) || |
1593 | (perf_missing_features.aux_output && evsel->core.attr.aux_output)) | |
32a951b4 ACM |
1594 | return -EINVAL; |
1595 | ||
c24ae6d9 | 1596 | if (cpus == NULL) { |
f854839b | 1597 | static struct perf_cpu_map *empty_cpu_map; |
c24ae6d9 ACM |
1598 | |
1599 | if (empty_cpu_map == NULL) { | |
397721e0 | 1600 | empty_cpu_map = perf_cpu_map__dummy_new(); |
c24ae6d9 ACM |
1601 | if (empty_cpu_map == NULL) |
1602 | return -ENOMEM; | |
1603 | } | |
1604 | ||
1605 | cpus = empty_cpu_map; | |
1606 | } | |
1607 | ||
1608 | if (threads == NULL) { | |
9749b90e | 1609 | static struct perf_thread_map *empty_thread_map; |
c24ae6d9 ACM |
1610 | |
1611 | if (empty_thread_map == NULL) { | |
1612 | empty_thread_map = thread_map__new_by_tid(-1); | |
1613 | if (empty_thread_map == NULL) | |
1614 | return -ENOMEM; | |
1615 | } | |
1616 | ||
1617 | threads = empty_thread_map; | |
1618 | } | |
1619 | ||
648b5af3 | 1620 | if (evsel->core.system_wide) |
bf8e8f4b AH |
1621 | nthreads = 1; |
1622 | else | |
1623 | nthreads = threads->nr; | |
1624 | ||
9dfcb759 | 1625 | if (evsel->core.fd == NULL && |
b8eca4d7 | 1626 | perf_evsel__alloc_fd(&evsel->core, cpus->nr, nthreads) < 0) |
727ab04e | 1627 | return -ENOMEM; |
4eed11d5 | 1628 | |
023695d9 | 1629 | if (evsel->cgrp) { |
57480d2c | 1630 | flags |= PERF_FLAG_PID_CGROUP; |
023695d9 SE |
1631 | pid = evsel->cgrp->fd; |
1632 | } | |
1633 | ||
594ac61a | 1634 | fallback_missing_features: |
814c8c38 | 1635 | if (perf_missing_features.clockid_wrong) |
1fc632ce | 1636 | evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */ |
814c8c38 | 1637 | if (perf_missing_features.clockid) { |
1fc632ce JO |
1638 | evsel->core.attr.use_clockid = 0; |
1639 | evsel->core.attr.clockid = 0; | |
814c8c38 | 1640 | } |
57480d2c YD |
1641 | if (perf_missing_features.cloexec) |
1642 | flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; | |
5c5e854b | 1643 | if (perf_missing_features.mmap2) |
1fc632ce | 1644 | evsel->core.attr.mmap2 = 0; |
594ac61a | 1645 | if (perf_missing_features.exclude_guest) |
1fc632ce | 1646 | evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0; |
bd0f8895 | 1647 | if (perf_missing_features.lbr_flags) |
1fc632ce | 1648 | evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS | |
bd0f8895 | 1649 | PERF_SAMPLE_BRANCH_NO_CYCLES); |
1fc632ce JO |
1650 | if (perf_missing_features.group_read && evsel->core.attr.inherit) |
1651 | evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID); | |
9aa0bfa3 | 1652 | if (perf_missing_features.ksymbol) |
1fc632ce | 1653 | evsel->core.attr.ksymbol = 0; |
74a1e863 | 1654 | if (perf_missing_features.bpf) |
1fc632ce | 1655 | evsel->core.attr.bpf_event = 0; |
d3f85437 KL |
1656 | if (perf_missing_features.branch_hw_idx) |
1657 | evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX; | |
594ac61a ACM |
1658 | retry_sample_id: |
1659 | if (perf_missing_features.sample_id_all) | |
1fc632ce | 1660 | evsel->core.attr.sample_id_all = 0; |
594ac61a | 1661 | |
1fc632ce | 1662 | display_attr(&evsel->core.attr); |
e3e1a54f | 1663 | |
4804e011 | 1664 | for (cpu = start_cpu; cpu < end_cpu; cpu++) { |
9d04f178 | 1665 | |
bf8e8f4b | 1666 | for (thread = 0; thread < nthreads; thread++) { |
83c2e4f3 | 1667 | int fd, group_fd; |
023695d9 | 1668 | |
648b5af3 | 1669 | if (!evsel->cgrp && !evsel->core.system_wide) |
a2f354e3 | 1670 | pid = perf_thread_map__pid(threads, thread); |
023695d9 | 1671 | |
6a4bb04c | 1672 | group_fd = get_group_fd(evsel, cpu, thread); |
bec19672 | 1673 | retry_open: |
10213e2f JO |
1674 | test_attr__ready(); |
1675 | ||
4e8a5c15 JO |
1676 | fd = perf_event_open(evsel, pid, cpus->map[cpu], |
1677 | group_fd, flags); | |
83c2e4f3 JO |
1678 | |
1679 | FD(evsel, cpu, thread) = fd; | |
1680 | ||
1681 | if (fd < 0) { | |
727ab04e | 1682 | err = -errno; |
a359c17a | 1683 | |
ca800068 | 1684 | if (ignore_missing_thread(evsel, cpus->nr, cpu, threads, thread, err)) { |
a359c17a JO |
1685 | /* |
1686 | * We just removed 1 thread, so take a step | |
1687 | * back on thread index and lower the upper | |
1688 | * nthreads limit. | |
1689 | */ | |
1690 | nthreads--; | |
1691 | thread--; | |
1692 | ||
1693 | /* ... and pretend like nothing have happened. */ | |
1694 | err = 0; | |
1695 | continue; | |
1696 | } | |
1697 | ||
ccd26741 | 1698 | pr_debug2_peo("\nsys_perf_event_open failed, error %d\n", |
f852fd62 | 1699 | err); |
594ac61a | 1700 | goto try_fallback; |
727ab04e | 1701 | } |
1f45b1d4 | 1702 | |
ccd26741 | 1703 | pr_debug2_peo(" = %d\n", fd); |
7b4b82bc | 1704 | |
1f45b1d4 | 1705 | if (evsel->bpf_fd >= 0) { |
83c2e4f3 | 1706 | int evt_fd = fd; |
1f45b1d4 WN |
1707 | int bpf_fd = evsel->bpf_fd; |
1708 | ||
1709 | err = ioctl(evt_fd, | |
1710 | PERF_EVENT_IOC_SET_BPF, | |
1711 | bpf_fd); | |
1712 | if (err && errno != EEXIST) { | |
1713 | pr_err("failed to attach bpf fd %d: %s\n", | |
1714 | bpf_fd, strerror(errno)); | |
1715 | err = -EINVAL; | |
1716 | goto out_close; | |
1717 | } | |
1718 | } | |
1719 | ||
bec19672 | 1720 | set_rlimit = NO_CHANGE; |
814c8c38 PZ |
1721 | |
1722 | /* | |
1723 | * If we succeeded but had to kill clockid, fail and | |
2bb72dbb | 1724 | * have evsel__open_strerror() print us a nice error. |
814c8c38 PZ |
1725 | */ |
1726 | if (perf_missing_features.clockid || | |
1727 | perf_missing_features.clockid_wrong) { | |
1728 | err = -EINVAL; | |
1729 | goto out_close; | |
1730 | } | |
0252208e | 1731 | } |
48290609 ACM |
1732 | } |
1733 | ||
1734 | return 0; | |
1735 | ||
594ac61a | 1736 | try_fallback: |
bec19672 AK |
1737 | /* |
1738 | * perf stat needs between 5 and 22 fds per CPU. When we run out | |
1739 | * of them try to increase the limits. | |
1740 | */ | |
1741 | if (err == -EMFILE && set_rlimit < INCREASED_MAX) { | |
1742 | struct rlimit l; | |
bec19672 | 1743 | |
796c01a4 | 1744 | old_errno = errno; |
bec19672 AK |
1745 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { |
1746 | if (set_rlimit == NO_CHANGE) | |
1747 | l.rlim_cur = l.rlim_max; | |
1748 | else { | |
1749 | l.rlim_cur = l.rlim_max + 1000; | |
1750 | l.rlim_max = l.rlim_cur; | |
1751 | } | |
1752 | if (setrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1753 | set_rlimit++; | |
1754 | errno = old_errno; | |
1755 | goto retry_open; | |
1756 | } | |
1757 | } | |
1758 | errno = old_errno; | |
1759 | } | |
1760 | ||
594ac61a ACM |
1761 | if (err != -EINVAL || cpu > 0 || thread > 0) |
1762 | goto out_close; | |
1763 | ||
814c8c38 PZ |
1764 | /* |
1765 | * Must probe features in the order they were added to the | |
1766 | * perf_event_attr interface. | |
1767 | */ | |
8fb4b679 NK |
1768 | if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) { |
1769 | perf_missing_features.cgroup = true; | |
1770 | pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n"); | |
1771 | goto out_close; | |
1772 | } else if (!perf_missing_features.branch_hw_idx && | |
d3f85437 KL |
1773 | (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) { |
1774 | perf_missing_features.branch_hw_idx = true; | |
1775 | pr_debug2("switching off branch HW index support\n"); | |
1776 | goto fallback_missing_features; | |
1777 | } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) { | |
acb9f2d4 | 1778 | perf_missing_features.aux_output = true; |
ccd26741 | 1779 | pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n"); |
acb9f2d4 | 1780 | goto out_close; |
74a1e863 ACM |
1781 | } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) { |
1782 | perf_missing_features.bpf = true; | |
ccd26741 | 1783 | pr_debug2_peo("switching off bpf_event\n"); |
45178a92 | 1784 | goto fallback_missing_features; |
1fc632ce | 1785 | } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) { |
9aa0bfa3 | 1786 | perf_missing_features.ksymbol = true; |
ccd26741 | 1787 | pr_debug2_peo("switching off ksymbol\n"); |
9aa0bfa3 | 1788 | goto fallback_missing_features; |
1fc632ce | 1789 | } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) { |
7da36e94 | 1790 | perf_missing_features.write_backward = true; |
ccd26741 | 1791 | pr_debug2_peo("switching off write_backward\n"); |
32a951b4 | 1792 | goto out_close; |
1fc632ce | 1793 | } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) { |
814c8c38 | 1794 | perf_missing_features.clockid_wrong = true; |
ccd26741 | 1795 | pr_debug2_peo("switching off clockid\n"); |
814c8c38 | 1796 | goto fallback_missing_features; |
1fc632ce | 1797 | } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) { |
814c8c38 | 1798 | perf_missing_features.clockid = true; |
ccd26741 | 1799 | pr_debug2_peo("switching off use_clockid\n"); |
814c8c38 PZ |
1800 | goto fallback_missing_features; |
1801 | } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) { | |
57480d2c | 1802 | perf_missing_features.cloexec = true; |
ccd26741 | 1803 | pr_debug2_peo("switching off cloexec flag\n"); |
57480d2c | 1804 | goto fallback_missing_features; |
1fc632ce | 1805 | } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) { |
5c5e854b | 1806 | perf_missing_features.mmap2 = true; |
ccd26741 | 1807 | pr_debug2_peo("switching off mmap2\n"); |
5c5e854b SE |
1808 | goto fallback_missing_features; |
1809 | } else if (!perf_missing_features.exclude_guest && | |
1fc632ce | 1810 | (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host)) { |
594ac61a | 1811 | perf_missing_features.exclude_guest = true; |
ccd26741 | 1812 | pr_debug2_peo("switching off exclude_guest, exclude_host\n"); |
594ac61a ACM |
1813 | goto fallback_missing_features; |
1814 | } else if (!perf_missing_features.sample_id_all) { | |
1815 | perf_missing_features.sample_id_all = true; | |
ccd26741 | 1816 | pr_debug2_peo("switching off sample_id_all\n"); |
594ac61a | 1817 | goto retry_sample_id; |
bd0f8895 | 1818 | } else if (!perf_missing_features.lbr_flags && |
1fc632ce | 1819 | (evsel->core.attr.branch_sample_type & |
bd0f8895 AK |
1820 | (PERF_SAMPLE_BRANCH_NO_CYCLES | |
1821 | PERF_SAMPLE_BRANCH_NO_FLAGS))) { | |
1822 | perf_missing_features.lbr_flags = true; | |
ccd26741 | 1823 | pr_debug2_peo("switching off branch sample type no (cycles/flags)\n"); |
bd0f8895 | 1824 | goto fallback_missing_features; |
82bf311e | 1825 | } else if (!perf_missing_features.group_read && |
1fc632ce JO |
1826 | evsel->core.attr.inherit && |
1827 | (evsel->core.attr.read_format & PERF_FORMAT_GROUP) && | |
c754c382 | 1828 | evsel__is_group_leader(evsel)) { |
82bf311e | 1829 | perf_missing_features.group_read = true; |
ccd26741 | 1830 | pr_debug2_peo("switching off group read\n"); |
82bf311e | 1831 | goto fallback_missing_features; |
594ac61a | 1832 | } |
48290609 | 1833 | out_close: |
ab6c79b8 JY |
1834 | if (err) |
1835 | threads->err_thread = thread; | |
1836 | ||
796c01a4 | 1837 | old_errno = errno; |
0252208e ACM |
1838 | do { |
1839 | while (--thread >= 0) { | |
2ccfb8bc AK |
1840 | if (FD(evsel, cpu, thread) >= 0) |
1841 | close(FD(evsel, cpu, thread)); | |
0252208e ACM |
1842 | FD(evsel, cpu, thread) = -1; |
1843 | } | |
bf8e8f4b | 1844 | thread = nthreads; |
0252208e | 1845 | } while (--cpu >= 0); |
796c01a4 | 1846 | errno = old_errno; |
727ab04e ACM |
1847 | return err; |
1848 | } | |
1849 | ||
4804e011 AK |
1850 | int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus, |
1851 | struct perf_thread_map *threads) | |
1852 | { | |
1853 | return evsel__open_cpu(evsel, cpus, threads, 0, cpus ? cpus->nr : 1); | |
1854 | } | |
1855 | ||
88761fa1 | 1856 | void evsel__close(struct evsel *evsel) |
727ab04e | 1857 | { |
88761fa1 | 1858 | perf_evsel__close(&evsel->core); |
70c20369 | 1859 | perf_evsel__free_id(&evsel->core); |
48290609 ACM |
1860 | } |
1861 | ||
aa8c406b | 1862 | int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu) |
48290609 | 1863 | { |
4804e011 AK |
1864 | if (cpu == -1) |
1865 | return evsel__open_cpu(evsel, cpus, NULL, 0, | |
1866 | cpus ? cpus->nr : 1); | |
1867 | ||
1868 | return evsel__open_cpu(evsel, cpus, NULL, cpu, cpu + 1); | |
0252208e | 1869 | } |
48290609 | 1870 | |
aa8c406b | 1871 | int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads) |
0252208e | 1872 | { |
5972d1e0 | 1873 | return evsel__open(evsel, NULL, threads); |
48290609 | 1874 | } |
70082dd9 | 1875 | |
32dcd021 | 1876 | static int perf_evsel__parse_id_sample(const struct evsel *evsel, |
0807d2d8 ACM |
1877 | const union perf_event *event, |
1878 | struct perf_sample *sample) | |
d0dd74e8 | 1879 | { |
1fc632ce | 1880 | u64 type = evsel->core.attr.sample_type; |
b1fcd190 | 1881 | const __u64 *array = event->sample.array; |
0807d2d8 | 1882 | bool swapped = evsel->needs_swap; |
37073f9e | 1883 | union u64_swap u; |
d0dd74e8 ACM |
1884 | |
1885 | array += ((event->header.size - | |
1886 | sizeof(event->header)) / sizeof(u64)) - 1; | |
1887 | ||
75562573 AH |
1888 | if (type & PERF_SAMPLE_IDENTIFIER) { |
1889 | sample->id = *array; | |
1890 | array--; | |
1891 | } | |
1892 | ||
d0dd74e8 | 1893 | if (type & PERF_SAMPLE_CPU) { |
37073f9e JO |
1894 | u.val64 = *array; |
1895 | if (swapped) { | |
1896 | /* undo swap of u64, then swap on individual u32s */ | |
1897 | u.val64 = bswap_64(u.val64); | |
1898 | u.val32[0] = bswap_32(u.val32[0]); | |
1899 | } | |
1900 | ||
1901 | sample->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1902 | array--; |
1903 | } | |
1904 | ||
1905 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1906 | sample->stream_id = *array; | |
1907 | array--; | |
1908 | } | |
1909 | ||
1910 | if (type & PERF_SAMPLE_ID) { | |
1911 | sample->id = *array; | |
1912 | array--; | |
1913 | } | |
1914 | ||
1915 | if (type & PERF_SAMPLE_TIME) { | |
1916 | sample->time = *array; | |
1917 | array--; | |
1918 | } | |
1919 | ||
1920 | if (type & PERF_SAMPLE_TID) { | |
37073f9e JO |
1921 | u.val64 = *array; |
1922 | if (swapped) { | |
1923 | /* undo swap of u64, then swap on individual u32s */ | |
1924 | u.val64 = bswap_64(u.val64); | |
1925 | u.val32[0] = bswap_32(u.val32[0]); | |
1926 | u.val32[1] = bswap_32(u.val32[1]); | |
1927 | } | |
1928 | ||
1929 | sample->pid = u.val32[0]; | |
1930 | sample->tid = u.val32[1]; | |
dd44bc6b | 1931 | array--; |
d0dd74e8 ACM |
1932 | } |
1933 | ||
1934 | return 0; | |
1935 | } | |
1936 | ||
03b6ea9b AH |
1937 | static inline bool overflow(const void *endp, u16 max_size, const void *offset, |
1938 | u64 size) | |
98e1da90 | 1939 | { |
03b6ea9b AH |
1940 | return size > max_size || offset + size > endp; |
1941 | } | |
98e1da90 | 1942 | |
03b6ea9b AH |
1943 | #define OVERFLOW_CHECK(offset, size, max_size) \ |
1944 | do { \ | |
1945 | if (overflow(endp, (max_size), (offset), (size))) \ | |
1946 | return -EFAULT; \ | |
1947 | } while (0) | |
98e1da90 | 1948 | |
03b6ea9b AH |
1949 | #define OVERFLOW_CHECK_u64(offset) \ |
1950 | OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64)) | |
98e1da90 | 1951 | |
01468120 JO |
1952 | static int |
1953 | perf_event__check_size(union perf_event *event, unsigned int sample_size) | |
1954 | { | |
1955 | /* | |
1956 | * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes | |
1957 | * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to | |
1958 | * check the format does not go past the end of the event. | |
1959 | */ | |
1960 | if (sample_size + sizeof(event->header) > event->header.size) | |
1961 | return -EFAULT; | |
1962 | ||
1963 | return 0; | |
1964 | } | |
1965 | ||
6b6017a2 ACM |
1966 | int evsel__parse_sample(struct evsel *evsel, union perf_event *event, |
1967 | struct perf_sample *data) | |
d0dd74e8 | 1968 | { |
1fc632ce | 1969 | u64 type = evsel->core.attr.sample_type; |
0807d2d8 | 1970 | bool swapped = evsel->needs_swap; |
b1fcd190 | 1971 | const __u64 *array; |
03b6ea9b AH |
1972 | u16 max_size = event->header.size; |
1973 | const void *endp = (void *)event + max_size; | |
1974 | u64 sz; | |
d0dd74e8 | 1975 | |
936be503 DA |
1976 | /* |
1977 | * used for cross-endian analysis. See git commit 65014ab3 | |
1978 | * for why this goofiness is needed. | |
1979 | */ | |
6a11f92e | 1980 | union u64_swap u; |
936be503 | 1981 | |
f3bda2c9 | 1982 | memset(data, 0, sizeof(*data)); |
d0dd74e8 ACM |
1983 | data->cpu = data->pid = data->tid = -1; |
1984 | data->stream_id = data->id = data->time = -1ULL; | |
1fc632ce | 1985 | data->period = evsel->core.attr.sample_period; |
473398a2 | 1986 | data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
28a0b398 | 1987 | data->misc = event->header.misc; |
3ad31d8a JO |
1988 | data->id = -1ULL; |
1989 | data->data_src = PERF_MEM_DATA_SRC_NONE; | |
d0dd74e8 ACM |
1990 | |
1991 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
1fc632ce | 1992 | if (!evsel->core.attr.sample_id_all) |
d0dd74e8 | 1993 | return 0; |
0807d2d8 | 1994 | return perf_evsel__parse_id_sample(evsel, event, data); |
d0dd74e8 ACM |
1995 | } |
1996 | ||
1997 | array = event->sample.array; | |
1998 | ||
01468120 | 1999 | if (perf_event__check_size(event, evsel->sample_size)) |
a2854124 FW |
2000 | return -EFAULT; |
2001 | ||
75562573 AH |
2002 | if (type & PERF_SAMPLE_IDENTIFIER) { |
2003 | data->id = *array; | |
2004 | array++; | |
2005 | } | |
2006 | ||
d0dd74e8 | 2007 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 2008 | data->ip = *array; |
d0dd74e8 ACM |
2009 | array++; |
2010 | } | |
2011 | ||
2012 | if (type & PERF_SAMPLE_TID) { | |
936be503 DA |
2013 | u.val64 = *array; |
2014 | if (swapped) { | |
2015 | /* undo swap of u64, then swap on individual u32s */ | |
2016 | u.val64 = bswap_64(u.val64); | |
2017 | u.val32[0] = bswap_32(u.val32[0]); | |
2018 | u.val32[1] = bswap_32(u.val32[1]); | |
2019 | } | |
2020 | ||
2021 | data->pid = u.val32[0]; | |
2022 | data->tid = u.val32[1]; | |
d0dd74e8 ACM |
2023 | array++; |
2024 | } | |
2025 | ||
2026 | if (type & PERF_SAMPLE_TIME) { | |
2027 | data->time = *array; | |
2028 | array++; | |
2029 | } | |
2030 | ||
2031 | if (type & PERF_SAMPLE_ADDR) { | |
2032 | data->addr = *array; | |
2033 | array++; | |
2034 | } | |
2035 | ||
d0dd74e8 ACM |
2036 | if (type & PERF_SAMPLE_ID) { |
2037 | data->id = *array; | |
2038 | array++; | |
2039 | } | |
2040 | ||
2041 | if (type & PERF_SAMPLE_STREAM_ID) { | |
2042 | data->stream_id = *array; | |
2043 | array++; | |
2044 | } | |
2045 | ||
2046 | if (type & PERF_SAMPLE_CPU) { | |
936be503 DA |
2047 | |
2048 | u.val64 = *array; | |
2049 | if (swapped) { | |
2050 | /* undo swap of u64, then swap on individual u32s */ | |
2051 | u.val64 = bswap_64(u.val64); | |
2052 | u.val32[0] = bswap_32(u.val32[0]); | |
2053 | } | |
2054 | ||
2055 | data->cpu = u.val32[0]; | |
d0dd74e8 ACM |
2056 | array++; |
2057 | } | |
2058 | ||
2059 | if (type & PERF_SAMPLE_PERIOD) { | |
2060 | data->period = *array; | |
2061 | array++; | |
2062 | } | |
2063 | ||
2064 | if (type & PERF_SAMPLE_READ) { | |
1fc632ce | 2065 | u64 read_format = evsel->core.attr.read_format; |
9ede473c | 2066 | |
03b6ea9b | 2067 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
2068 | if (read_format & PERF_FORMAT_GROUP) |
2069 | data->read.group.nr = *array; | |
2070 | else | |
2071 | data->read.one.value = *array; | |
2072 | ||
2073 | array++; | |
2074 | ||
2075 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
03b6ea9b | 2076 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
2077 | data->read.time_enabled = *array; |
2078 | array++; | |
2079 | } | |
2080 | ||
2081 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
03b6ea9b | 2082 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
2083 | data->read.time_running = *array; |
2084 | array++; | |
2085 | } | |
2086 | ||
2087 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
2088 | if (read_format & PERF_FORMAT_GROUP) { | |
03b6ea9b AH |
2089 | const u64 max_group_nr = UINT64_MAX / |
2090 | sizeof(struct sample_read_value); | |
2091 | ||
2092 | if (data->read.group.nr > max_group_nr) | |
2093 | return -EFAULT; | |
2094 | sz = data->read.group.nr * | |
2095 | sizeof(struct sample_read_value); | |
2096 | OVERFLOW_CHECK(array, sz, max_size); | |
2097 | data->read.group.values = | |
2098 | (struct sample_read_value *)array; | |
2099 | array = (void *)array + sz; | |
9ede473c | 2100 | } else { |
03b6ea9b | 2101 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
2102 | data->read.one.id = *array; |
2103 | array++; | |
2104 | } | |
d0dd74e8 ACM |
2105 | } |
2106 | ||
8e94b324 | 2107 | if (type & PERF_SAMPLE_CALLCHAIN) { |
03b6ea9b | 2108 | const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); |
98e1da90 | 2109 | |
03b6ea9b AH |
2110 | OVERFLOW_CHECK_u64(array); |
2111 | data->callchain = (struct ip_callchain *)array++; | |
2112 | if (data->callchain->nr > max_callchain_nr) | |
98e1da90 | 2113 | return -EFAULT; |
03b6ea9b AH |
2114 | sz = data->callchain->nr * sizeof(u64); |
2115 | OVERFLOW_CHECK(array, sz, max_size); | |
2116 | array = (void *)array + sz; | |
d0dd74e8 ACM |
2117 | } |
2118 | ||
2119 | if (type & PERF_SAMPLE_RAW) { | |
03b6ea9b | 2120 | OVERFLOW_CHECK_u64(array); |
936be503 | 2121 | u.val64 = *array; |
f9d8adb3 JO |
2122 | |
2123 | /* | |
2124 | * Undo swap of u64, then swap on individual u32s, | |
2125 | * get the size of the raw area and undo all of the | |
2126 | * swap. The pevent interface handles endianity by | |
2127 | * itself. | |
2128 | */ | |
2129 | if (swapped) { | |
936be503 DA |
2130 | u.val64 = bswap_64(u.val64); |
2131 | u.val32[0] = bswap_32(u.val32[0]); | |
2132 | u.val32[1] = bswap_32(u.val32[1]); | |
2133 | } | |
936be503 | 2134 | data->raw_size = u.val32[0]; |
f9d8adb3 JO |
2135 | |
2136 | /* | |
2137 | * The raw data is aligned on 64bits including the | |
2138 | * u32 size, so it's safe to use mem_bswap_64. | |
2139 | */ | |
2140 | if (swapped) | |
2141 | mem_bswap_64((void *) array, data->raw_size); | |
2142 | ||
03b6ea9b | 2143 | array = (void *)array + sizeof(u32); |
98e1da90 | 2144 | |
03b6ea9b AH |
2145 | OVERFLOW_CHECK(array, data->raw_size, max_size); |
2146 | data->raw_data = (void *)array; | |
2147 | array = (void *)array + data->raw_size; | |
d0dd74e8 ACM |
2148 | } |
2149 | ||
b5387528 | 2150 | if (type & PERF_SAMPLE_BRANCH_STACK) { |
03b6ea9b AH |
2151 | const u64 max_branch_nr = UINT64_MAX / |
2152 | sizeof(struct branch_entry); | |
b5387528 | 2153 | |
03b6ea9b AH |
2154 | OVERFLOW_CHECK_u64(array); |
2155 | data->branch_stack = (struct branch_stack *)array++; | |
b5387528 | 2156 | |
03b6ea9b AH |
2157 | if (data->branch_stack->nr > max_branch_nr) |
2158 | return -EFAULT; | |
42bbabed | 2159 | |
b5387528 | 2160 | sz = data->branch_stack->nr * sizeof(struct branch_entry); |
4f138a9e | 2161 | if (evsel__has_branch_hw_idx(evsel)) |
42bbabed KL |
2162 | sz += sizeof(u64); |
2163 | else | |
2164 | data->no_hw_idx = true; | |
03b6ea9b AH |
2165 | OVERFLOW_CHECK(array, sz, max_size); |
2166 | array = (void *)array + sz; | |
b5387528 | 2167 | } |
0f6a3015 JO |
2168 | |
2169 | if (type & PERF_SAMPLE_REGS_USER) { | |
03b6ea9b | 2170 | OVERFLOW_CHECK_u64(array); |
5b95a4a3 AH |
2171 | data->user_regs.abi = *array; |
2172 | array++; | |
0f6a3015 | 2173 | |
5b95a4a3 | 2174 | if (data->user_regs.abi) { |
1fc632ce | 2175 | u64 mask = evsel->core.attr.sample_regs_user; |
03b6ea9b | 2176 | |
3a5b64f0 | 2177 | sz = hweight64(mask) * sizeof(u64); |
03b6ea9b | 2178 | OVERFLOW_CHECK(array, sz, max_size); |
352ea45a | 2179 | data->user_regs.mask = mask; |
0f6a3015 | 2180 | data->user_regs.regs = (u64 *)array; |
03b6ea9b | 2181 | array = (void *)array + sz; |
0f6a3015 JO |
2182 | } |
2183 | } | |
2184 | ||
2185 | if (type & PERF_SAMPLE_STACK_USER) { | |
03b6ea9b AH |
2186 | OVERFLOW_CHECK_u64(array); |
2187 | sz = *array++; | |
0f6a3015 JO |
2188 | |
2189 | data->user_stack.offset = ((char *)(array - 1) | |
2190 | - (char *) event); | |
2191 | ||
03b6ea9b | 2192 | if (!sz) { |
0f6a3015 JO |
2193 | data->user_stack.size = 0; |
2194 | } else { | |
03b6ea9b | 2195 | OVERFLOW_CHECK(array, sz, max_size); |
0f6a3015 | 2196 | data->user_stack.data = (char *)array; |
03b6ea9b AH |
2197 | array = (void *)array + sz; |
2198 | OVERFLOW_CHECK_u64(array); | |
54bd2692 | 2199 | data->user_stack.size = *array++; |
a65cb4b9 JO |
2200 | if (WARN_ONCE(data->user_stack.size > sz, |
2201 | "user stack dump failure\n")) | |
2202 | return -EFAULT; | |
0f6a3015 JO |
2203 | } |
2204 | } | |
2205 | ||
05484298 | 2206 | if (type & PERF_SAMPLE_WEIGHT) { |
03b6ea9b | 2207 | OVERFLOW_CHECK_u64(array); |
05484298 AK |
2208 | data->weight = *array; |
2209 | array++; | |
2210 | } | |
2211 | ||
98a3b32c | 2212 | if (type & PERF_SAMPLE_DATA_SRC) { |
03b6ea9b | 2213 | OVERFLOW_CHECK_u64(array); |
98a3b32c SE |
2214 | data->data_src = *array; |
2215 | array++; | |
2216 | } | |
2217 | ||
475eeab9 | 2218 | if (type & PERF_SAMPLE_TRANSACTION) { |
87b95524 | 2219 | OVERFLOW_CHECK_u64(array); |
475eeab9 AK |
2220 | data->transaction = *array; |
2221 | array++; | |
2222 | } | |
2223 | ||
6a21c0b5 SE |
2224 | data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE; |
2225 | if (type & PERF_SAMPLE_REGS_INTR) { | |
2226 | OVERFLOW_CHECK_u64(array); | |
2227 | data->intr_regs.abi = *array; | |
2228 | array++; | |
2229 | ||
2230 | if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) { | |
1fc632ce | 2231 | u64 mask = evsel->core.attr.sample_regs_intr; |
6a21c0b5 | 2232 | |
3a5b64f0 | 2233 | sz = hweight64(mask) * sizeof(u64); |
6a21c0b5 SE |
2234 | OVERFLOW_CHECK(array, sz, max_size); |
2235 | data->intr_regs.mask = mask; | |
2236 | data->intr_regs.regs = (u64 *)array; | |
2237 | array = (void *)array + sz; | |
2238 | } | |
2239 | } | |
2240 | ||
3b0a5daa KL |
2241 | data->phys_addr = 0; |
2242 | if (type & PERF_SAMPLE_PHYS_ADDR) { | |
2243 | data->phys_addr = *array; | |
2244 | array++; | |
2245 | } | |
2246 | ||
ba78c1c5 NK |
2247 | data->cgroup = 0; |
2248 | if (type & PERF_SAMPLE_CGROUP) { | |
2249 | data->cgroup = *array; | |
2250 | array++; | |
2251 | } | |
2252 | ||
98dcf14d AH |
2253 | if (type & PERF_SAMPLE_AUX) { |
2254 | OVERFLOW_CHECK_u64(array); | |
2255 | sz = *array++; | |
2256 | ||
2257 | OVERFLOW_CHECK(array, sz, max_size); | |
2258 | /* Undo swap of data */ | |
2259 | if (swapped) | |
2260 | mem_bswap_64((char *)array, sz); | |
2261 | data->aux_sample.size = sz; | |
2262 | data->aux_sample.data = (char *)array; | |
2263 | array = (void *)array + sz; | |
2264 | } | |
2265 | ||
d0dd74e8 ACM |
2266 | return 0; |
2267 | } | |
74eec26f | 2268 | |
6b6017a2 ACM |
2269 | int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event, |
2270 | u64 *timestamp) | |
01468120 | 2271 | { |
1fc632ce | 2272 | u64 type = evsel->core.attr.sample_type; |
b1fcd190 | 2273 | const __u64 *array; |
01468120 JO |
2274 | |
2275 | if (!(type & PERF_SAMPLE_TIME)) | |
2276 | return -1; | |
2277 | ||
2278 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
2279 | struct perf_sample data = { | |
2280 | .time = -1ULL, | |
2281 | }; | |
2282 | ||
1fc632ce | 2283 | if (!evsel->core.attr.sample_id_all) |
01468120 JO |
2284 | return -1; |
2285 | if (perf_evsel__parse_id_sample(evsel, event, &data)) | |
2286 | return -1; | |
2287 | ||
2288 | *timestamp = data.time; | |
2289 | return 0; | |
2290 | } | |
2291 | ||
2292 | array = event->sample.array; | |
2293 | ||
2294 | if (perf_event__check_size(event, evsel->sample_size)) | |
2295 | return -EFAULT; | |
2296 | ||
2297 | if (type & PERF_SAMPLE_IDENTIFIER) | |
2298 | array++; | |
2299 | ||
2300 | if (type & PERF_SAMPLE_IP) | |
2301 | array++; | |
2302 | ||
2303 | if (type & PERF_SAMPLE_TID) | |
2304 | array++; | |
2305 | ||
2306 | if (type & PERF_SAMPLE_TIME) | |
2307 | *timestamp = *array; | |
2308 | ||
2309 | return 0; | |
2310 | } | |
2311 | ||
efc0cdc9 | 2312 | struct tep_format_field *evsel__field(struct evsel *evsel, const char *name) |
efd2b924 | 2313 | { |
af85cd19 | 2314 | return tep_find_field(evsel->tp_format, name); |
efd2b924 ACM |
2315 | } |
2316 | ||
efc0cdc9 | 2317 | void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name) |
5555ded4 | 2318 | { |
efc0cdc9 | 2319 | struct tep_format_field *field = evsel__field(evsel, name); |
5555ded4 ACM |
2320 | int offset; |
2321 | ||
efd2b924 ACM |
2322 | if (!field) |
2323 | return NULL; | |
5555ded4 ACM |
2324 | |
2325 | offset = field->offset; | |
2326 | ||
bb39ccb2 | 2327 | if (field->flags & TEP_FIELD_IS_DYNAMIC) { |
5555ded4 ACM |
2328 | offset = *(int *)(sample->raw_data + field->offset); |
2329 | offset &= 0xffff; | |
2330 | } | |
2331 | ||
2332 | return sample->raw_data + offset; | |
2333 | } | |
2334 | ||
2c92f982 | 2335 | u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample, |
90525176 | 2336 | bool needs_swap) |
5555ded4 | 2337 | { |
e6b6f679 | 2338 | u64 value; |
90525176 | 2339 | void *ptr = sample->raw_data + field->offset; |
5555ded4 | 2340 | |
e6b6f679 ACM |
2341 | switch (field->size) { |
2342 | case 1: | |
2343 | return *(u8 *)ptr; | |
2344 | case 2: | |
2345 | value = *(u16 *)ptr; | |
2346 | break; | |
2347 | case 4: | |
2348 | value = *(u32 *)ptr; | |
2349 | break; | |
2350 | case 8: | |
e94eedab | 2351 | memcpy(&value, ptr, sizeof(u64)); |
e6b6f679 ACM |
2352 | break; |
2353 | default: | |
2354 | return 0; | |
2355 | } | |
2356 | ||
90525176 | 2357 | if (!needs_swap) |
e6b6f679 ACM |
2358 | return value; |
2359 | ||
2360 | switch (field->size) { | |
2361 | case 2: | |
2362 | return bswap_16(value); | |
2363 | case 4: | |
2364 | return bswap_32(value); | |
2365 | case 8: | |
2366 | return bswap_64(value); | |
2367 | default: | |
2368 | return 0; | |
2369 | } | |
2370 | ||
2371 | return 0; | |
5555ded4 | 2372 | } |
0698aedd | 2373 | |
efc0cdc9 | 2374 | u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name) |
90525176 | 2375 | { |
efc0cdc9 | 2376 | struct tep_format_field *field = evsel__field(evsel, name); |
90525176 ACM |
2377 | |
2378 | if (!field) | |
2379 | return 0; | |
2380 | ||
2381 | return field ? format_field__intval(field, sample, evsel->needs_swap) : 0; | |
2382 | } | |
2383 | ||
ae430892 | 2384 | bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize) |
c0a54341 | 2385 | { |
08094828 ACM |
2386 | int paranoid; |
2387 | ||
2b821cce | 2388 | if ((err == ENOENT || err == ENXIO || err == ENODEV) && |
1fc632ce JO |
2389 | evsel->core.attr.type == PERF_TYPE_HARDWARE && |
2390 | evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) { | |
c0a54341 ACM |
2391 | /* |
2392 | * If it's cycles then fall back to hrtimer based | |
2393 | * cpu-clock-tick sw counter, which is always available even if | |
2394 | * no PMU support. | |
2395 | * | |
2396 | * PPC returns ENXIO until 2.6.37 (behavior changed with commit | |
2397 | * b0a873e). | |
2398 | */ | |
2399 | scnprintf(msg, msgsize, "%s", | |
2400 | "The cycles event is not supported, trying to fall back to cpu-clock-ticks"); | |
2401 | ||
1fc632ce JO |
2402 | evsel->core.attr.type = PERF_TYPE_SOFTWARE; |
2403 | evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK; | |
c0a54341 | 2404 | |
04662523 | 2405 | zfree(&evsel->name); |
08094828 | 2406 | return true; |
1fc632ce | 2407 | } else if (err == EACCES && !evsel->core.attr.exclude_kernel && |
08094828 | 2408 | (paranoid = perf_event_paranoid()) > 1) { |
8ab2e96d | 2409 | const char *name = evsel__name(evsel); |
08094828 | 2410 | char *new_name; |
129193bb | 2411 | const char *sep = ":"; |
08094828 | 2412 | |
bec49a9e SE |
2413 | /* If event has exclude user then don't exclude kernel. */ |
2414 | if (evsel->core.attr.exclude_user) | |
2415 | return false; | |
2416 | ||
129193bb JO |
2417 | /* Is there already the separator in the name. */ |
2418 | if (strchr(name, '/') || | |
2419 | strchr(name, ':')) | |
2420 | sep = ""; | |
2421 | ||
2422 | if (asprintf(&new_name, "%s%su", name, sep) < 0) | |
08094828 ACM |
2423 | return false; |
2424 | ||
2425 | if (evsel->name) | |
2426 | free(evsel->name); | |
2427 | evsel->name = new_name; | |
4ec8d984 SE |
2428 | scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying " |
2429 | "to fall back to excluding kernel and hypervisor " | |
2430 | " samples", paranoid); | |
1fc632ce | 2431 | evsel->core.attr.exclude_kernel = 1; |
4ec8d984 | 2432 | evsel->core.attr.exclude_hv = 1; |
08094828 | 2433 | |
c0a54341 ACM |
2434 | return true; |
2435 | } | |
2436 | ||
2437 | return false; | |
2438 | } | |
56e52e85 | 2439 | |
2157f6ee ACM |
2440 | static bool find_process(const char *name) |
2441 | { | |
2442 | size_t len = strlen(name); | |
2443 | DIR *dir; | |
2444 | struct dirent *d; | |
2445 | int ret = -1; | |
2446 | ||
2447 | dir = opendir(procfs__mountpoint()); | |
2448 | if (!dir) | |
2449 | return false; | |
2450 | ||
2451 | /* Walk through the directory. */ | |
2452 | while (ret && (d = readdir(dir)) != NULL) { | |
2453 | char path[PATH_MAX]; | |
2454 | char *data; | |
2455 | size_t size; | |
2456 | ||
2457 | if ((d->d_type != DT_DIR) || | |
2458 | !strcmp(".", d->d_name) || | |
2459 | !strcmp("..", d->d_name)) | |
2460 | continue; | |
2461 | ||
2462 | scnprintf(path, sizeof(path), "%s/%s/comm", | |
2463 | procfs__mountpoint(), d->d_name); | |
2464 | ||
2465 | if (filename__read_str(path, &data, &size)) | |
2466 | continue; | |
2467 | ||
2468 | ret = strncmp(name, data, len); | |
2469 | free(data); | |
2470 | } | |
2471 | ||
2472 | closedir(dir); | |
2473 | return ret ? false : true; | |
2474 | } | |
2475 | ||
2bb72dbb ACM |
2476 | int evsel__open_strerror(struct evsel *evsel, struct target *target, |
2477 | int err, char *msg, size_t size) | |
56e52e85 | 2478 | { |
6e81c74c | 2479 | char sbuf[STRERR_BUFSIZE]; |
32ccb130 | 2480 | int printed = 0; |
6e81c74c | 2481 | |
56e52e85 ACM |
2482 | switch (err) { |
2483 | case EPERM: | |
2484 | case EACCES: | |
32ccb130 JY |
2485 | if (err == EPERM) |
2486 | printed = scnprintf(msg, size, | |
8ab2e96d | 2487 | "No permission to enable %s event.\n\n", evsel__name(evsel)); |
32ccb130 JY |
2488 | |
2489 | return scnprintf(msg + printed, size - printed, | |
3379e0c3 BH |
2490 | "You may not have permission to collect %sstats.\n\n" |
2491 | "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n" | |
2492 | "which controls use of the performance events system by\n" | |
6b3e0e2e | 2493 | "unprivileged users (without CAP_PERFMON or CAP_SYS_ADMIN).\n\n" |
7d173913 | 2494 | "The current value is %d:\n\n" |
3379e0c3 | 2495 | " -1: Allow use of (almost) all events by all users\n" |
ac0bb6b7 | 2496 | " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n" |
6b3e0e2e AB |
2497 | ">= 0: Disallow ftrace function tracepoint by users without CAP_PERFMON or CAP_SYS_ADMIN\n" |
2498 | " Disallow raw tracepoint access by users without CAP_SYS_PERFMON or CAP_SYS_ADMIN\n" | |
2499 | ">= 1: Disallow CPU event access by users without CAP_PERFMON or CAP_SYS_ADMIN\n" | |
2500 | ">= 2: Disallow kernel profiling by users without CAP_PERFMON or CAP_SYS_ADMIN\n\n" | |
d6195a6a ACM |
2501 | "To make this setting permanent, edit /etc/sysctl.conf too, e.g.:\n\n" |
2502 | " kernel.perf_event_paranoid = -1\n" , | |
7d173913 ACM |
2503 | target->system_wide ? "system-wide " : "", |
2504 | perf_event_paranoid()); | |
56e52e85 | 2505 | case ENOENT: |
8ab2e96d | 2506 | return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel)); |
56e52e85 ACM |
2507 | case EMFILE: |
2508 | return scnprintf(msg, size, "%s", | |
2509 | "Too many events are opened.\n" | |
18ffdfe8 JO |
2510 | "Probably the maximum number of open file descriptors has been reached.\n" |
2511 | "Hint: Try again after reducing the number of events.\n" | |
2512 | "Hint: Try increasing the limit with 'ulimit -n <limit>'"); | |
de46d526 | 2513 | case ENOMEM: |
27de9b2b | 2514 | if (evsel__has_callchain(evsel) && |
de46d526 ACM |
2515 | access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0) |
2516 | return scnprintf(msg, size, | |
2517 | "Not enough memory to setup event with callchain.\n" | |
2518 | "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n" | |
029c75e5 | 2519 | "Hint: Current value: %d", sysctl__max_stack()); |
de46d526 | 2520 | break; |
56e52e85 ACM |
2521 | case ENODEV: |
2522 | if (target->cpu_list) | |
2523 | return scnprintf(msg, size, "%s", | |
81d64f46 | 2524 | "No such device - did you specify an out-of-range profile CPU?"); |
56e52e85 ACM |
2525 | break; |
2526 | case EOPNOTSUPP: | |
1fc632ce | 2527 | if (evsel->core.attr.sample_period != 0) |
114bc191 KP |
2528 | return scnprintf(msg, size, |
2529 | "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'", | |
8ab2e96d | 2530 | evsel__name(evsel)); |
1fc632ce | 2531 | if (evsel->core.attr.precise_ip) |
56e52e85 ACM |
2532 | return scnprintf(msg, size, "%s", |
2533 | "\'precise\' request may not be supported. Try removing 'p' modifier."); | |
2534 | #if defined(__i386__) || defined(__x86_64__) | |
1fc632ce | 2535 | if (evsel->core.attr.type == PERF_TYPE_HARDWARE) |
56e52e85 | 2536 | return scnprintf(msg, size, "%s", |
ccbb6afe | 2537 | "No hardware sampling interrupt available.\n"); |
56e52e85 ACM |
2538 | #endif |
2539 | break; | |
63914aca JO |
2540 | case EBUSY: |
2541 | if (find_process("oprofiled")) | |
2542 | return scnprintf(msg, size, | |
2543 | "The PMU counters are busy/taken by another profiler.\n" | |
2544 | "We found oprofile daemon running, please stop it and try again."); | |
2545 | break; | |
814c8c38 | 2546 | case EINVAL: |
1fc632ce | 2547 | if (evsel->core.attr.write_backward && perf_missing_features.write_backward) |
7da36e94 | 2548 | return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel."); |
814c8c38 PZ |
2549 | if (perf_missing_features.clockid) |
2550 | return scnprintf(msg, size, "clockid feature not supported."); | |
2551 | if (perf_missing_features.clockid_wrong) | |
2552 | return scnprintf(msg, size, "wrong clockid (%d).", clockid); | |
acb9f2d4 ACM |
2553 | if (perf_missing_features.aux_output) |
2554 | return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel."); | |
814c8c38 | 2555 | break; |
56e52e85 ACM |
2556 | default: |
2557 | break; | |
2558 | } | |
2559 | ||
2560 | return scnprintf(msg, size, | |
6e81c74c | 2561 | "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" |
ec394845 | 2562 | "/bin/dmesg | grep -i perf may provide additional information.\n", |
8ab2e96d | 2563 | err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel)); |
56e52e85 | 2564 | } |
f4e47f9f | 2565 | |
6e6d1d65 | 2566 | struct perf_env *evsel__env(struct evsel *evsel) |
69fb09f6 | 2567 | { |
5449f13c ACM |
2568 | if (evsel && evsel->evlist) |
2569 | return evsel->evlist->env; | |
9db0e363 | 2570 | return &perf_env; |
69fb09f6 | 2571 | } |
650d6220 | 2572 | |
63503dba | 2573 | static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist) |
650d6220 JO |
2574 | { |
2575 | int cpu, thread; | |
2576 | ||
9dfcb759 JO |
2577 | for (cpu = 0; cpu < xyarray__max_x(evsel->core.fd); cpu++) { |
2578 | for (thread = 0; thread < xyarray__max_y(evsel->core.fd); | |
650d6220 JO |
2579 | thread++) { |
2580 | int fd = FD(evsel, cpu, thread); | |
2581 | ||
d5a99483 | 2582 | if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, |
650d6220 JO |
2583 | cpu, thread, fd) < 0) |
2584 | return -1; | |
2585 | } | |
2586 | } | |
2587 | ||
2588 | return 0; | |
2589 | } | |
2590 | ||
34397753 | 2591 | int evsel__store_ids(struct evsel *evsel, struct evlist *evlist) |
650d6220 | 2592 | { |
d400bd3a | 2593 | struct perf_cpu_map *cpus = evsel->core.cpus; |
af663bd0 | 2594 | struct perf_thread_map *threads = evsel->core.threads; |
650d6220 | 2595 | |
70c20369 | 2596 | if (perf_evsel__alloc_id(&evsel->core, cpus->nr, threads->nr)) |
650d6220 JO |
2597 | return -ENOMEM; |
2598 | ||
2599 | return store_evsel_ids(evsel, evlist); | |
2600 | } |