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Commit | Line | Data |
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f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
9 | ||
936be503 | 10 | #include <byteswap.h> |
0f6a3015 | 11 | #include <linux/bitops.h> |
553873e1 | 12 | #include <api/fs/debugfs.h> |
4e319027 RR |
13 | #include <traceevent/event-parse.h> |
14 | #include <linux/hw_breakpoint.h> | |
15 | #include <linux/perf_event.h> | |
bec19672 | 16 | #include <sys/resource.h> |
4e319027 | 17 | #include "asm/bug.h" |
69aad6f1 | 18 | #include "evsel.h" |
70082dd9 | 19 | #include "evlist.h" |
69aad6f1 | 20 | #include "util.h" |
86bd5e86 | 21 | #include "cpumap.h" |
fd78260b | 22 | #include "thread_map.h" |
12864b31 | 23 | #include "target.h" |
26d33022 | 24 | #include "perf_regs.h" |
e3e1a54f | 25 | #include "debug.h" |
97978b3e | 26 | #include "trace-event.h" |
69aad6f1 | 27 | |
594ac61a ACM |
28 | static struct { |
29 | bool sample_id_all; | |
30 | bool exclude_guest; | |
5c5e854b | 31 | bool mmap2; |
57480d2c | 32 | bool cloexec; |
594ac61a ACM |
33 | } perf_missing_features; |
34 | ||
ce8ccff5 ACM |
35 | static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused) |
36 | { | |
37 | return 0; | |
38 | } | |
39 | ||
40 | static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused) | |
41 | { | |
42 | } | |
43 | ||
44 | static struct { | |
45 | size_t size; | |
46 | int (*init)(struct perf_evsel *evsel); | |
47 | void (*fini)(struct perf_evsel *evsel); | |
48 | } perf_evsel__object = { | |
49 | .size = sizeof(struct perf_evsel), | |
50 | .init = perf_evsel__no_extra_init, | |
51 | .fini = perf_evsel__no_extra_fini, | |
52 | }; | |
53 | ||
54 | int perf_evsel__object_config(size_t object_size, | |
55 | int (*init)(struct perf_evsel *evsel), | |
56 | void (*fini)(struct perf_evsel *evsel)) | |
57 | { | |
58 | ||
59 | if (object_size == 0) | |
60 | goto set_methods; | |
61 | ||
62 | if (perf_evsel__object.size > object_size) | |
63 | return -EINVAL; | |
64 | ||
65 | perf_evsel__object.size = object_size; | |
66 | ||
67 | set_methods: | |
68 | if (init != NULL) | |
69 | perf_evsel__object.init = init; | |
70 | ||
71 | if (fini != NULL) | |
72 | perf_evsel__object.fini = fini; | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
c52b12ed ACM |
77 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
78 | ||
75562573 | 79 | int __perf_evsel__sample_size(u64 sample_type) |
c2a70653 ACM |
80 | { |
81 | u64 mask = sample_type & PERF_SAMPLE_MASK; | |
82 | int size = 0; | |
83 | int i; | |
84 | ||
85 | for (i = 0; i < 64; i++) { | |
86 | if (mask & (1ULL << i)) | |
87 | size++; | |
88 | } | |
89 | ||
90 | size *= sizeof(u64); | |
91 | ||
92 | return size; | |
93 | } | |
94 | ||
75562573 AH |
95 | /** |
96 | * __perf_evsel__calc_id_pos - calculate id_pos. | |
97 | * @sample_type: sample type | |
98 | * | |
99 | * This function returns the position of the event id (PERF_SAMPLE_ID or | |
100 | * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct | |
101 | * sample_event. | |
102 | */ | |
103 | static int __perf_evsel__calc_id_pos(u64 sample_type) | |
104 | { | |
105 | int idx = 0; | |
106 | ||
107 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
108 | return 0; | |
109 | ||
110 | if (!(sample_type & PERF_SAMPLE_ID)) | |
111 | return -1; | |
112 | ||
113 | if (sample_type & PERF_SAMPLE_IP) | |
114 | idx += 1; | |
115 | ||
116 | if (sample_type & PERF_SAMPLE_TID) | |
117 | idx += 1; | |
118 | ||
119 | if (sample_type & PERF_SAMPLE_TIME) | |
120 | idx += 1; | |
121 | ||
122 | if (sample_type & PERF_SAMPLE_ADDR) | |
123 | idx += 1; | |
124 | ||
125 | return idx; | |
126 | } | |
127 | ||
128 | /** | |
129 | * __perf_evsel__calc_is_pos - calculate is_pos. | |
130 | * @sample_type: sample type | |
131 | * | |
132 | * This function returns the position (counting backwards) of the event id | |
133 | * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if | |
134 | * sample_id_all is used there is an id sample appended to non-sample events. | |
135 | */ | |
136 | static int __perf_evsel__calc_is_pos(u64 sample_type) | |
137 | { | |
138 | int idx = 1; | |
139 | ||
140 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
141 | return 1; | |
142 | ||
143 | if (!(sample_type & PERF_SAMPLE_ID)) | |
144 | return -1; | |
145 | ||
146 | if (sample_type & PERF_SAMPLE_CPU) | |
147 | idx += 1; | |
148 | ||
149 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
150 | idx += 1; | |
151 | ||
152 | return idx; | |
153 | } | |
154 | ||
155 | void perf_evsel__calc_id_pos(struct perf_evsel *evsel) | |
156 | { | |
157 | evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type); | |
158 | evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type); | |
159 | } | |
160 | ||
4bf9ce1b | 161 | void hists__init(struct hists *hists) |
0e2a5f10 ACM |
162 | { |
163 | memset(hists, 0, sizeof(*hists)); | |
164 | hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT; | |
165 | hists->entries_in = &hists->entries_in_array[0]; | |
166 | hists->entries_collapsed = RB_ROOT; | |
167 | hists->entries = RB_ROOT; | |
168 | pthread_mutex_init(&hists->lock, NULL); | |
169 | } | |
170 | ||
7be5ebe8 ACM |
171 | void __perf_evsel__set_sample_bit(struct perf_evsel *evsel, |
172 | enum perf_event_sample_format bit) | |
173 | { | |
174 | if (!(evsel->attr.sample_type & bit)) { | |
175 | evsel->attr.sample_type |= bit; | |
176 | evsel->sample_size += sizeof(u64); | |
75562573 | 177 | perf_evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
178 | } |
179 | } | |
180 | ||
181 | void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel, | |
182 | enum perf_event_sample_format bit) | |
183 | { | |
184 | if (evsel->attr.sample_type & bit) { | |
185 | evsel->attr.sample_type &= ~bit; | |
186 | evsel->sample_size -= sizeof(u64); | |
75562573 | 187 | perf_evsel__calc_id_pos(evsel); |
7be5ebe8 ACM |
188 | } |
189 | } | |
190 | ||
75562573 AH |
191 | void perf_evsel__set_sample_id(struct perf_evsel *evsel, |
192 | bool can_sample_identifier) | |
7a5a5ca5 | 193 | { |
75562573 AH |
194 | if (can_sample_identifier) { |
195 | perf_evsel__reset_sample_bit(evsel, ID); | |
196 | perf_evsel__set_sample_bit(evsel, IDENTIFIER); | |
197 | } else { | |
198 | perf_evsel__set_sample_bit(evsel, ID); | |
199 | } | |
7a5a5ca5 ACM |
200 | evsel->attr.read_format |= PERF_FORMAT_ID; |
201 | } | |
202 | ||
ef1d1af2 ACM |
203 | void perf_evsel__init(struct perf_evsel *evsel, |
204 | struct perf_event_attr *attr, int idx) | |
205 | { | |
206 | evsel->idx = idx; | |
60b0896c | 207 | evsel->tracking = !idx; |
ef1d1af2 | 208 | evsel->attr = *attr; |
2cfda562 | 209 | evsel->leader = evsel; |
410136f5 SE |
210 | evsel->unit = ""; |
211 | evsel->scale = 1.0; | |
ef1d1af2 | 212 | INIT_LIST_HEAD(&evsel->node); |
1980c2eb | 213 | hists__init(&evsel->hists); |
ce8ccff5 | 214 | perf_evsel__object.init(evsel); |
bde09467 | 215 | evsel->sample_size = __perf_evsel__sample_size(attr->sample_type); |
75562573 | 216 | perf_evsel__calc_id_pos(evsel); |
ef1d1af2 ACM |
217 | } |
218 | ||
ef503831 | 219 | struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) |
69aad6f1 | 220 | { |
ce8ccff5 | 221 | struct perf_evsel *evsel = zalloc(perf_evsel__object.size); |
69aad6f1 | 222 | |
ef1d1af2 ACM |
223 | if (evsel != NULL) |
224 | perf_evsel__init(evsel, attr, idx); | |
69aad6f1 ACM |
225 | |
226 | return evsel; | |
227 | } | |
228 | ||
ef503831 | 229 | struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx) |
efd2b924 | 230 | { |
ce8ccff5 | 231 | struct perf_evsel *evsel = zalloc(perf_evsel__object.size); |
efd2b924 ACM |
232 | |
233 | if (evsel != NULL) { | |
234 | struct perf_event_attr attr = { | |
0b80f8b3 ACM |
235 | .type = PERF_TYPE_TRACEPOINT, |
236 | .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | | |
237 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
efd2b924 ACM |
238 | }; |
239 | ||
e48ffe2b ACM |
240 | if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) |
241 | goto out_free; | |
242 | ||
97978b3e | 243 | evsel->tp_format = trace_event__tp_format(sys, name); |
efd2b924 ACM |
244 | if (evsel->tp_format == NULL) |
245 | goto out_free; | |
246 | ||
0b80f8b3 | 247 | event_attr_init(&attr); |
efd2b924 | 248 | attr.config = evsel->tp_format->id; |
0b80f8b3 | 249 | attr.sample_period = 1; |
efd2b924 | 250 | perf_evsel__init(evsel, &attr, idx); |
efd2b924 ACM |
251 | } |
252 | ||
253 | return evsel; | |
254 | ||
255 | out_free: | |
74cf249d | 256 | zfree(&evsel->name); |
efd2b924 ACM |
257 | free(evsel); |
258 | return NULL; | |
259 | } | |
260 | ||
8ad7013b | 261 | const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = { |
c410431c ACM |
262 | "cycles", |
263 | "instructions", | |
264 | "cache-references", | |
265 | "cache-misses", | |
266 | "branches", | |
267 | "branch-misses", | |
268 | "bus-cycles", | |
269 | "stalled-cycles-frontend", | |
270 | "stalled-cycles-backend", | |
271 | "ref-cycles", | |
272 | }; | |
273 | ||
dd4f5223 | 274 | static const char *__perf_evsel__hw_name(u64 config) |
c410431c ACM |
275 | { |
276 | if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config]) | |
277 | return perf_evsel__hw_names[config]; | |
278 | ||
279 | return "unknown-hardware"; | |
280 | } | |
281 | ||
27f18617 | 282 | static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size) |
c410431c | 283 | { |
27f18617 | 284 | int colon = 0, r = 0; |
c410431c | 285 | struct perf_event_attr *attr = &evsel->attr; |
c410431c ACM |
286 | bool exclude_guest_default = false; |
287 | ||
288 | #define MOD_PRINT(context, mod) do { \ | |
289 | if (!attr->exclude_##context) { \ | |
27f18617 | 290 | if (!colon) colon = ++r; \ |
c410431c ACM |
291 | r += scnprintf(bf + r, size - r, "%c", mod); \ |
292 | } } while(0) | |
293 | ||
294 | if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { | |
295 | MOD_PRINT(kernel, 'k'); | |
296 | MOD_PRINT(user, 'u'); | |
297 | MOD_PRINT(hv, 'h'); | |
298 | exclude_guest_default = true; | |
299 | } | |
300 | ||
301 | if (attr->precise_ip) { | |
302 | if (!colon) | |
27f18617 | 303 | colon = ++r; |
c410431c ACM |
304 | r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); |
305 | exclude_guest_default = true; | |
306 | } | |
307 | ||
308 | if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { | |
309 | MOD_PRINT(host, 'H'); | |
310 | MOD_PRINT(guest, 'G'); | |
311 | } | |
312 | #undef MOD_PRINT | |
313 | if (colon) | |
27f18617 | 314 | bf[colon - 1] = ':'; |
c410431c ACM |
315 | return r; |
316 | } | |
317 | ||
27f18617 ACM |
318 | static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size) |
319 | { | |
320 | int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config)); | |
321 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
322 | } | |
323 | ||
8ad7013b | 324 | const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = { |
335c2f5d ACM |
325 | "cpu-clock", |
326 | "task-clock", | |
327 | "page-faults", | |
328 | "context-switches", | |
8ad7013b | 329 | "cpu-migrations", |
335c2f5d ACM |
330 | "minor-faults", |
331 | "major-faults", | |
332 | "alignment-faults", | |
333 | "emulation-faults", | |
d22d1a2a | 334 | "dummy", |
335c2f5d ACM |
335 | }; |
336 | ||
dd4f5223 | 337 | static const char *__perf_evsel__sw_name(u64 config) |
335c2f5d ACM |
338 | { |
339 | if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config]) | |
340 | return perf_evsel__sw_names[config]; | |
341 | return "unknown-software"; | |
342 | } | |
343 | ||
344 | static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size) | |
345 | { | |
346 | int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config)); | |
347 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
348 | } | |
349 | ||
287e74aa JO |
350 | static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) |
351 | { | |
352 | int r; | |
353 | ||
354 | r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); | |
355 | ||
356 | if (type & HW_BREAKPOINT_R) | |
357 | r += scnprintf(bf + r, size - r, "r"); | |
358 | ||
359 | if (type & HW_BREAKPOINT_W) | |
360 | r += scnprintf(bf + r, size - r, "w"); | |
361 | ||
362 | if (type & HW_BREAKPOINT_X) | |
363 | r += scnprintf(bf + r, size - r, "x"); | |
364 | ||
365 | return r; | |
366 | } | |
367 | ||
368 | static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size) | |
369 | { | |
370 | struct perf_event_attr *attr = &evsel->attr; | |
371 | int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); | |
372 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
373 | } | |
374 | ||
0b668bc9 ACM |
375 | const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX] |
376 | [PERF_EVSEL__MAX_ALIASES] = { | |
377 | { "L1-dcache", "l1-d", "l1d", "L1-data", }, | |
378 | { "L1-icache", "l1-i", "l1i", "L1-instruction", }, | |
379 | { "LLC", "L2", }, | |
380 | { "dTLB", "d-tlb", "Data-TLB", }, | |
381 | { "iTLB", "i-tlb", "Instruction-TLB", }, | |
382 | { "branch", "branches", "bpu", "btb", "bpc", }, | |
383 | { "node", }, | |
384 | }; | |
385 | ||
386 | const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX] | |
387 | [PERF_EVSEL__MAX_ALIASES] = { | |
388 | { "load", "loads", "read", }, | |
389 | { "store", "stores", "write", }, | |
390 | { "prefetch", "prefetches", "speculative-read", "speculative-load", }, | |
391 | }; | |
392 | ||
393 | const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX] | |
394 | [PERF_EVSEL__MAX_ALIASES] = { | |
395 | { "refs", "Reference", "ops", "access", }, | |
396 | { "misses", "miss", }, | |
397 | }; | |
398 | ||
399 | #define C(x) PERF_COUNT_HW_CACHE_##x | |
400 | #define CACHE_READ (1 << C(OP_READ)) | |
401 | #define CACHE_WRITE (1 << C(OP_WRITE)) | |
402 | #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) | |
403 | #define COP(x) (1 << x) | |
404 | ||
405 | /* | |
406 | * cache operartion stat | |
407 | * L1I : Read and prefetch only | |
408 | * ITLB and BPU : Read-only | |
409 | */ | |
410 | static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = { | |
411 | [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
412 | [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), | |
413 | [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
414 | [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
415 | [C(ITLB)] = (CACHE_READ), | |
416 | [C(BPU)] = (CACHE_READ), | |
417 | [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
418 | }; | |
419 | ||
420 | bool perf_evsel__is_cache_op_valid(u8 type, u8 op) | |
421 | { | |
422 | if (perf_evsel__hw_cache_stat[type] & COP(op)) | |
423 | return true; /* valid */ | |
424 | else | |
425 | return false; /* invalid */ | |
426 | } | |
427 | ||
428 | int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, | |
429 | char *bf, size_t size) | |
430 | { | |
431 | if (result) { | |
432 | return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0], | |
433 | perf_evsel__hw_cache_op[op][0], | |
434 | perf_evsel__hw_cache_result[result][0]); | |
435 | } | |
436 | ||
437 | return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0], | |
438 | perf_evsel__hw_cache_op[op][1]); | |
439 | } | |
440 | ||
dd4f5223 | 441 | static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size) |
0b668bc9 ACM |
442 | { |
443 | u8 op, result, type = (config >> 0) & 0xff; | |
444 | const char *err = "unknown-ext-hardware-cache-type"; | |
445 | ||
446 | if (type > PERF_COUNT_HW_CACHE_MAX) | |
447 | goto out_err; | |
448 | ||
449 | op = (config >> 8) & 0xff; | |
450 | err = "unknown-ext-hardware-cache-op"; | |
451 | if (op > PERF_COUNT_HW_CACHE_OP_MAX) | |
452 | goto out_err; | |
453 | ||
454 | result = (config >> 16) & 0xff; | |
455 | err = "unknown-ext-hardware-cache-result"; | |
456 | if (result > PERF_COUNT_HW_CACHE_RESULT_MAX) | |
457 | goto out_err; | |
458 | ||
459 | err = "invalid-cache"; | |
460 | if (!perf_evsel__is_cache_op_valid(type, op)) | |
461 | goto out_err; | |
462 | ||
463 | return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size); | |
464 | out_err: | |
465 | return scnprintf(bf, size, "%s", err); | |
466 | } | |
467 | ||
468 | static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size) | |
469 | { | |
470 | int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size); | |
471 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
472 | } | |
473 | ||
6eef3d9c ACM |
474 | static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size) |
475 | { | |
476 | int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config); | |
477 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
478 | } | |
479 | ||
7289f83c | 480 | const char *perf_evsel__name(struct perf_evsel *evsel) |
a4460836 | 481 | { |
7289f83c | 482 | char bf[128]; |
a4460836 | 483 | |
7289f83c ACM |
484 | if (evsel->name) |
485 | return evsel->name; | |
c410431c ACM |
486 | |
487 | switch (evsel->attr.type) { | |
488 | case PERF_TYPE_RAW: | |
6eef3d9c | 489 | perf_evsel__raw_name(evsel, bf, sizeof(bf)); |
c410431c ACM |
490 | break; |
491 | ||
492 | case PERF_TYPE_HARDWARE: | |
7289f83c | 493 | perf_evsel__hw_name(evsel, bf, sizeof(bf)); |
c410431c | 494 | break; |
0b668bc9 ACM |
495 | |
496 | case PERF_TYPE_HW_CACHE: | |
7289f83c | 497 | perf_evsel__hw_cache_name(evsel, bf, sizeof(bf)); |
0b668bc9 ACM |
498 | break; |
499 | ||
335c2f5d | 500 | case PERF_TYPE_SOFTWARE: |
7289f83c | 501 | perf_evsel__sw_name(evsel, bf, sizeof(bf)); |
335c2f5d ACM |
502 | break; |
503 | ||
a4460836 | 504 | case PERF_TYPE_TRACEPOINT: |
7289f83c | 505 | scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); |
a4460836 ACM |
506 | break; |
507 | ||
287e74aa JO |
508 | case PERF_TYPE_BREAKPOINT: |
509 | perf_evsel__bp_name(evsel, bf, sizeof(bf)); | |
510 | break; | |
511 | ||
c410431c | 512 | default: |
ca1b1457 RR |
513 | scnprintf(bf, sizeof(bf), "unknown attr type: %d", |
514 | evsel->attr.type); | |
a4460836 | 515 | break; |
c410431c ACM |
516 | } |
517 | ||
7289f83c ACM |
518 | evsel->name = strdup(bf); |
519 | ||
520 | return evsel->name ?: "unknown"; | |
c410431c ACM |
521 | } |
522 | ||
717e263f NK |
523 | const char *perf_evsel__group_name(struct perf_evsel *evsel) |
524 | { | |
525 | return evsel->group_name ?: "anon group"; | |
526 | } | |
527 | ||
528 | int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size) | |
529 | { | |
530 | int ret; | |
531 | struct perf_evsel *pos; | |
532 | const char *group_name = perf_evsel__group_name(evsel); | |
533 | ||
534 | ret = scnprintf(buf, size, "%s", group_name); | |
535 | ||
536 | ret += scnprintf(buf + ret, size - ret, " { %s", | |
537 | perf_evsel__name(evsel)); | |
538 | ||
539 | for_each_group_member(pos, evsel) | |
540 | ret += scnprintf(buf + ret, size - ret, ", %s", | |
541 | perf_evsel__name(pos)); | |
542 | ||
543 | ret += scnprintf(buf + ret, size - ret, " }"); | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
6bedfab6 | 548 | static void |
72a128aa | 549 | perf_evsel__config_callgraph(struct perf_evsel *evsel) |
6bedfab6 JO |
550 | { |
551 | bool function = perf_evsel__is_function_event(evsel); | |
552 | struct perf_event_attr *attr = &evsel->attr; | |
553 | ||
554 | perf_evsel__set_sample_bit(evsel, CALLCHAIN); | |
555 | ||
72a128aa | 556 | if (callchain_param.record_mode == CALLCHAIN_DWARF) { |
6bedfab6 JO |
557 | if (!function) { |
558 | perf_evsel__set_sample_bit(evsel, REGS_USER); | |
559 | perf_evsel__set_sample_bit(evsel, STACK_USER); | |
560 | attr->sample_regs_user = PERF_REGS_MASK; | |
72a128aa | 561 | attr->sample_stack_user = callchain_param.dump_size; |
6bedfab6 JO |
562 | attr->exclude_callchain_user = 1; |
563 | } else { | |
564 | pr_info("Cannot use DWARF unwind for function trace event," | |
565 | " falling back to framepointers.\n"); | |
566 | } | |
567 | } | |
568 | ||
569 | if (function) { | |
570 | pr_info("Disabling user space callchains for function trace event.\n"); | |
571 | attr->exclude_callchain_user = 1; | |
572 | } | |
573 | } | |
574 | ||
774cb499 JO |
575 | /* |
576 | * The enable_on_exec/disabled value strategy: | |
577 | * | |
578 | * 1) For any type of traced program: | |
579 | * - all independent events and group leaders are disabled | |
580 | * - all group members are enabled | |
581 | * | |
582 | * Group members are ruled by group leaders. They need to | |
583 | * be enabled, because the group scheduling relies on that. | |
584 | * | |
585 | * 2) For traced programs executed by perf: | |
586 | * - all independent events and group leaders have | |
587 | * enable_on_exec set | |
588 | * - we don't specifically enable or disable any event during | |
589 | * the record command | |
590 | * | |
591 | * Independent events and group leaders are initially disabled | |
592 | * and get enabled by exec. Group members are ruled by group | |
593 | * leaders as stated in 1). | |
594 | * | |
595 | * 3) For traced programs attached by perf (pid/tid): | |
596 | * - we specifically enable or disable all events during | |
597 | * the record command | |
598 | * | |
599 | * When attaching events to already running traced we | |
600 | * enable/disable events specifically, as there's no | |
601 | * initial traced exec call. | |
602 | */ | |
b4006796 | 603 | void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts) |
0f82ebc4 | 604 | { |
3c176311 | 605 | struct perf_evsel *leader = evsel->leader; |
0f82ebc4 | 606 | struct perf_event_attr *attr = &evsel->attr; |
60b0896c | 607 | int track = evsel->tracking; |
3aa5939d | 608 | bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread; |
0f82ebc4 | 609 | |
594ac61a | 610 | attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; |
0f82ebc4 | 611 | attr->inherit = !opts->no_inherit; |
0f82ebc4 | 612 | |
7be5ebe8 ACM |
613 | perf_evsel__set_sample_bit(evsel, IP); |
614 | perf_evsel__set_sample_bit(evsel, TID); | |
0f82ebc4 | 615 | |
3c176311 JO |
616 | if (evsel->sample_read) { |
617 | perf_evsel__set_sample_bit(evsel, READ); | |
618 | ||
619 | /* | |
620 | * We need ID even in case of single event, because | |
621 | * PERF_SAMPLE_READ process ID specific data. | |
622 | */ | |
75562573 | 623 | perf_evsel__set_sample_id(evsel, false); |
3c176311 JO |
624 | |
625 | /* | |
626 | * Apply group format only if we belong to group | |
627 | * with more than one members. | |
628 | */ | |
629 | if (leader->nr_members > 1) { | |
630 | attr->read_format |= PERF_FORMAT_GROUP; | |
631 | attr->inherit = 0; | |
632 | } | |
633 | } | |
634 | ||
0f82ebc4 | 635 | /* |
17314e23 | 636 | * We default some events to have a default interval. But keep |
0f82ebc4 ACM |
637 | * it a weak assumption overridable by the user. |
638 | */ | |
17314e23 | 639 | if (!attr->sample_period || (opts->user_freq != UINT_MAX || |
0f82ebc4 ACM |
640 | opts->user_interval != ULLONG_MAX)) { |
641 | if (opts->freq) { | |
7be5ebe8 | 642 | perf_evsel__set_sample_bit(evsel, PERIOD); |
0f82ebc4 ACM |
643 | attr->freq = 1; |
644 | attr->sample_freq = opts->freq; | |
645 | } else { | |
646 | attr->sample_period = opts->default_interval; | |
647 | } | |
648 | } | |
649 | ||
3c176311 JO |
650 | /* |
651 | * Disable sampling for all group members other | |
652 | * than leader in case leader 'leads' the sampling. | |
653 | */ | |
654 | if ((leader != evsel) && leader->sample_read) { | |
655 | attr->sample_freq = 0; | |
656 | attr->sample_period = 0; | |
657 | } | |
658 | ||
0f82ebc4 ACM |
659 | if (opts->no_samples) |
660 | attr->sample_freq = 0; | |
661 | ||
662 | if (opts->inherit_stat) | |
663 | attr->inherit_stat = 1; | |
664 | ||
665 | if (opts->sample_address) { | |
7be5ebe8 | 666 | perf_evsel__set_sample_bit(evsel, ADDR); |
0f82ebc4 ACM |
667 | attr->mmap_data = track; |
668 | } | |
669 | ||
72a128aa NK |
670 | if (callchain_param.enabled && !evsel->no_aux_samples) |
671 | perf_evsel__config_callgraph(evsel); | |
26d33022 | 672 | |
3aa5939d | 673 | if (target__has_cpu(&opts->target)) |
7be5ebe8 | 674 | perf_evsel__set_sample_bit(evsel, CPU); |
0f82ebc4 | 675 | |
3e76ac78 | 676 | if (opts->period) |
7be5ebe8 | 677 | perf_evsel__set_sample_bit(evsel, PERIOD); |
3e76ac78 | 678 | |
8affc2b8 AK |
679 | /* |
680 | * When the user explicitely disabled time don't force it here. | |
681 | */ | |
682 | if (opts->sample_time && | |
683 | (!perf_missing_features.sample_id_all && | |
684 | (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu))) | |
7be5ebe8 | 685 | perf_evsel__set_sample_bit(evsel, TIME); |
0f82ebc4 | 686 | |
6ff1ce76 | 687 | if (opts->raw_samples && !evsel->no_aux_samples) { |
7be5ebe8 ACM |
688 | perf_evsel__set_sample_bit(evsel, TIME); |
689 | perf_evsel__set_sample_bit(evsel, RAW); | |
690 | perf_evsel__set_sample_bit(evsel, CPU); | |
0f82ebc4 ACM |
691 | } |
692 | ||
ccf49bfc | 693 | if (opts->sample_address) |
1e7ed5ec | 694 | perf_evsel__set_sample_bit(evsel, DATA_SRC); |
ccf49bfc | 695 | |
509051ea | 696 | if (opts->no_buffering) { |
0f82ebc4 ACM |
697 | attr->watermark = 0; |
698 | attr->wakeup_events = 1; | |
699 | } | |
6ff1ce76 | 700 | if (opts->branch_stack && !evsel->no_aux_samples) { |
7be5ebe8 | 701 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); |
bdfebd84 RAV |
702 | attr->branch_sample_type = opts->branch_stack; |
703 | } | |
0f82ebc4 | 704 | |
05484298 | 705 | if (opts->sample_weight) |
1e7ed5ec | 706 | perf_evsel__set_sample_bit(evsel, WEIGHT); |
05484298 | 707 | |
5c5e854b | 708 | attr->mmap = track; |
a5a5ba72 | 709 | attr->mmap2 = track && !perf_missing_features.mmap2; |
5c5e854b | 710 | attr->comm = track; |
0f82ebc4 | 711 | |
475eeab9 | 712 | if (opts->sample_transaction) |
1e7ed5ec | 713 | perf_evsel__set_sample_bit(evsel, TRANSACTION); |
475eeab9 | 714 | |
774cb499 JO |
715 | /* |
716 | * XXX see the function comment above | |
717 | * | |
718 | * Disabling only independent events or group leaders, | |
719 | * keeping group members enabled. | |
720 | */ | |
823254ed | 721 | if (perf_evsel__is_group_leader(evsel)) |
774cb499 JO |
722 | attr->disabled = 1; |
723 | ||
724 | /* | |
725 | * Setting enable_on_exec for independent events and | |
726 | * group leaders for traced executed by perf. | |
727 | */ | |
6619a53e AK |
728 | if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) && |
729 | !opts->initial_delay) | |
0f82ebc4 | 730 | attr->enable_on_exec = 1; |
2afd2bcf AH |
731 | |
732 | if (evsel->immediate) { | |
733 | attr->disabled = 0; | |
734 | attr->enable_on_exec = 0; | |
735 | } | |
0f82ebc4 ACM |
736 | } |
737 | ||
69aad6f1 ACM |
738 | int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
739 | { | |
4af4c955 | 740 | int cpu, thread; |
bf8e8f4b AH |
741 | |
742 | if (evsel->system_wide) | |
743 | nthreads = 1; | |
744 | ||
69aad6f1 | 745 | evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int)); |
4af4c955 DA |
746 | |
747 | if (evsel->fd) { | |
748 | for (cpu = 0; cpu < ncpus; cpu++) { | |
749 | for (thread = 0; thread < nthreads; thread++) { | |
750 | FD(evsel, cpu, thread) = -1; | |
751 | } | |
752 | } | |
753 | } | |
754 | ||
69aad6f1 ACM |
755 | return evsel->fd != NULL ? 0 : -ENOMEM; |
756 | } | |
757 | ||
e2407bef AK |
758 | static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads, |
759 | int ioc, void *arg) | |
745cefc5 ACM |
760 | { |
761 | int cpu, thread; | |
762 | ||
bf8e8f4b AH |
763 | if (evsel->system_wide) |
764 | nthreads = 1; | |
765 | ||
745cefc5 ACM |
766 | for (cpu = 0; cpu < ncpus; cpu++) { |
767 | for (thread = 0; thread < nthreads; thread++) { | |
768 | int fd = FD(evsel, cpu, thread), | |
e2407bef | 769 | err = ioctl(fd, ioc, arg); |
745cefc5 ACM |
770 | |
771 | if (err) | |
772 | return err; | |
773 | } | |
774 | } | |
775 | ||
776 | return 0; | |
777 | } | |
778 | ||
e2407bef AK |
779 | int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads, |
780 | const char *filter) | |
781 | { | |
782 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
783 | PERF_EVENT_IOC_SET_FILTER, | |
784 | (void *)filter); | |
785 | } | |
786 | ||
787 | int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads) | |
788 | { | |
789 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
790 | PERF_EVENT_IOC_ENABLE, | |
791 | 0); | |
792 | } | |
793 | ||
70db7533 ACM |
794 | int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |
795 | { | |
bf8e8f4b AH |
796 | if (evsel->system_wide) |
797 | nthreads = 1; | |
798 | ||
a91e5431 ACM |
799 | evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id)); |
800 | if (evsel->sample_id == NULL) | |
801 | return -ENOMEM; | |
802 | ||
803 | evsel->id = zalloc(ncpus * nthreads * sizeof(u64)); | |
804 | if (evsel->id == NULL) { | |
805 | xyarray__delete(evsel->sample_id); | |
806 | evsel->sample_id = NULL; | |
807 | return -ENOMEM; | |
808 | } | |
809 | ||
810 | return 0; | |
70db7533 ACM |
811 | } |
812 | ||
a7e191c3 FD |
813 | void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus) |
814 | { | |
815 | memset(evsel->counts, 0, (sizeof(*evsel->counts) + | |
816 | (ncpus * sizeof(struct perf_counts_values)))); | |
817 | } | |
818 | ||
c52b12ed ACM |
819 | int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus) |
820 | { | |
821 | evsel->counts = zalloc((sizeof(*evsel->counts) + | |
822 | (ncpus * sizeof(struct perf_counts_values)))); | |
823 | return evsel->counts != NULL ? 0 : -ENOMEM; | |
824 | } | |
825 | ||
69aad6f1 ACM |
826 | void perf_evsel__free_fd(struct perf_evsel *evsel) |
827 | { | |
828 | xyarray__delete(evsel->fd); | |
829 | evsel->fd = NULL; | |
830 | } | |
831 | ||
70db7533 ACM |
832 | void perf_evsel__free_id(struct perf_evsel *evsel) |
833 | { | |
a91e5431 ACM |
834 | xyarray__delete(evsel->sample_id); |
835 | evsel->sample_id = NULL; | |
04662523 | 836 | zfree(&evsel->id); |
70db7533 ACM |
837 | } |
838 | ||
c52b12ed ACM |
839 | void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
840 | { | |
841 | int cpu, thread; | |
842 | ||
bf8e8f4b AH |
843 | if (evsel->system_wide) |
844 | nthreads = 1; | |
845 | ||
c52b12ed ACM |
846 | for (cpu = 0; cpu < ncpus; cpu++) |
847 | for (thread = 0; thread < nthreads; ++thread) { | |
848 | close(FD(evsel, cpu, thread)); | |
849 | FD(evsel, cpu, thread) = -1; | |
850 | } | |
851 | } | |
852 | ||
43f8e76e NK |
853 | void perf_evsel__free_counts(struct perf_evsel *evsel) |
854 | { | |
74cf249d | 855 | zfree(&evsel->counts); |
43f8e76e NK |
856 | } |
857 | ||
ef1d1af2 | 858 | void perf_evsel__exit(struct perf_evsel *evsel) |
69aad6f1 ACM |
859 | { |
860 | assert(list_empty(&evsel->node)); | |
736b05a0 NK |
861 | perf_evsel__free_fd(evsel); |
862 | perf_evsel__free_id(evsel); | |
ce8ccff5 | 863 | perf_evsel__object.fini(evsel); |
ef1d1af2 ACM |
864 | } |
865 | ||
866 | void perf_evsel__delete(struct perf_evsel *evsel) | |
867 | { | |
868 | perf_evsel__exit(evsel); | |
023695d9 | 869 | close_cgroup(evsel->cgrp); |
74cf249d | 870 | zfree(&evsel->group_name); |
e48ffe2b | 871 | if (evsel->tp_format) |
efd2b924 | 872 | pevent_free_format(evsel->tp_format); |
74cf249d | 873 | zfree(&evsel->name); |
69aad6f1 ACM |
874 | free(evsel); |
875 | } | |
c52b12ed | 876 | |
c7a79c47 SE |
877 | static inline void compute_deltas(struct perf_evsel *evsel, |
878 | int cpu, | |
879 | struct perf_counts_values *count) | |
880 | { | |
881 | struct perf_counts_values tmp; | |
882 | ||
883 | if (!evsel->prev_raw_counts) | |
884 | return; | |
885 | ||
886 | if (cpu == -1) { | |
887 | tmp = evsel->prev_raw_counts->aggr; | |
888 | evsel->prev_raw_counts->aggr = *count; | |
889 | } else { | |
890 | tmp = evsel->prev_raw_counts->cpu[cpu]; | |
891 | evsel->prev_raw_counts->cpu[cpu] = *count; | |
892 | } | |
893 | ||
894 | count->val = count->val - tmp.val; | |
895 | count->ena = count->ena - tmp.ena; | |
896 | count->run = count->run - tmp.run; | |
897 | } | |
898 | ||
c52b12ed ACM |
899 | int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, |
900 | int cpu, int thread, bool scale) | |
901 | { | |
902 | struct perf_counts_values count; | |
903 | size_t nv = scale ? 3 : 1; | |
904 | ||
905 | if (FD(evsel, cpu, thread) < 0) | |
906 | return -EINVAL; | |
907 | ||
4eed11d5 ACM |
908 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0) |
909 | return -ENOMEM; | |
910 | ||
c52b12ed ACM |
911 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) |
912 | return -errno; | |
913 | ||
c7a79c47 SE |
914 | compute_deltas(evsel, cpu, &count); |
915 | ||
c52b12ed ACM |
916 | if (scale) { |
917 | if (count.run == 0) | |
918 | count.val = 0; | |
919 | else if (count.run < count.ena) | |
920 | count.val = (u64)((double)count.val * count.ena / count.run + 0.5); | |
921 | } else | |
922 | count.ena = count.run = 0; | |
923 | ||
924 | evsel->counts->cpu[cpu] = count; | |
925 | return 0; | |
926 | } | |
927 | ||
928 | int __perf_evsel__read(struct perf_evsel *evsel, | |
929 | int ncpus, int nthreads, bool scale) | |
930 | { | |
931 | size_t nv = scale ? 3 : 1; | |
932 | int cpu, thread; | |
933 | struct perf_counts_values *aggr = &evsel->counts->aggr, count; | |
934 | ||
bf8e8f4b AH |
935 | if (evsel->system_wide) |
936 | nthreads = 1; | |
937 | ||
52bcd994 | 938 | aggr->val = aggr->ena = aggr->run = 0; |
c52b12ed ACM |
939 | |
940 | for (cpu = 0; cpu < ncpus; cpu++) { | |
941 | for (thread = 0; thread < nthreads; thread++) { | |
942 | if (FD(evsel, cpu, thread) < 0) | |
943 | continue; | |
944 | ||
945 | if (readn(FD(evsel, cpu, thread), | |
946 | &count, nv * sizeof(u64)) < 0) | |
947 | return -errno; | |
948 | ||
949 | aggr->val += count.val; | |
950 | if (scale) { | |
951 | aggr->ena += count.ena; | |
952 | aggr->run += count.run; | |
953 | } | |
954 | } | |
955 | } | |
956 | ||
c7a79c47 SE |
957 | compute_deltas(evsel, -1, aggr); |
958 | ||
c52b12ed ACM |
959 | evsel->counts->scaled = 0; |
960 | if (scale) { | |
961 | if (aggr->run == 0) { | |
962 | evsel->counts->scaled = -1; | |
963 | aggr->val = 0; | |
964 | return 0; | |
965 | } | |
966 | ||
967 | if (aggr->run < aggr->ena) { | |
968 | evsel->counts->scaled = 1; | |
969 | aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5); | |
970 | } | |
971 | } else | |
972 | aggr->ena = aggr->run = 0; | |
973 | ||
974 | return 0; | |
975 | } | |
48290609 | 976 | |
6a4bb04c JO |
977 | static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread) |
978 | { | |
979 | struct perf_evsel *leader = evsel->leader; | |
980 | int fd; | |
981 | ||
823254ed | 982 | if (perf_evsel__is_group_leader(evsel)) |
6a4bb04c JO |
983 | return -1; |
984 | ||
985 | /* | |
986 | * Leader must be already processed/open, | |
987 | * if not it's a bug. | |
988 | */ | |
989 | BUG_ON(!leader->fd); | |
990 | ||
991 | fd = FD(leader, cpu, thread); | |
992 | BUG_ON(fd == -1); | |
993 | ||
994 | return fd; | |
995 | } | |
996 | ||
e3e1a54f AH |
997 | #define __PRINT_ATTR(fmt, cast, field) \ |
998 | fprintf(fp, " %-19s "fmt"\n", #field, cast attr->field) | |
999 | ||
1000 | #define PRINT_ATTR_U32(field) __PRINT_ATTR("%u" , , field) | |
1001 | #define PRINT_ATTR_X32(field) __PRINT_ATTR("%#x", , field) | |
1002 | #define PRINT_ATTR_U64(field) __PRINT_ATTR("%" PRIu64, (uint64_t), field) | |
1003 | #define PRINT_ATTR_X64(field) __PRINT_ATTR("%#"PRIx64, (uint64_t), field) | |
1004 | ||
1005 | #define PRINT_ATTR2N(name1, field1, name2, field2) \ | |
1006 | fprintf(fp, " %-19s %u %-19s %u\n", \ | |
1007 | name1, attr->field1, name2, attr->field2) | |
1008 | ||
1009 | #define PRINT_ATTR2(field1, field2) \ | |
1010 | PRINT_ATTR2N(#field1, field1, #field2, field2) | |
1011 | ||
1012 | static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp) | |
1013 | { | |
1014 | size_t ret = 0; | |
1015 | ||
1016 | ret += fprintf(fp, "%.60s\n", graph_dotted_line); | |
1017 | ret += fprintf(fp, "perf_event_attr:\n"); | |
1018 | ||
1019 | ret += PRINT_ATTR_U32(type); | |
1020 | ret += PRINT_ATTR_U32(size); | |
1021 | ret += PRINT_ATTR_X64(config); | |
1022 | ret += PRINT_ATTR_U64(sample_period); | |
1023 | ret += PRINT_ATTR_U64(sample_freq); | |
1024 | ret += PRINT_ATTR_X64(sample_type); | |
1025 | ret += PRINT_ATTR_X64(read_format); | |
1026 | ||
1027 | ret += PRINT_ATTR2(disabled, inherit); | |
1028 | ret += PRINT_ATTR2(pinned, exclusive); | |
1029 | ret += PRINT_ATTR2(exclude_user, exclude_kernel); | |
1030 | ret += PRINT_ATTR2(exclude_hv, exclude_idle); | |
1031 | ret += PRINT_ATTR2(mmap, comm); | |
022c50d0 | 1032 | ret += PRINT_ATTR2(mmap2, comm_exec); |
e3e1a54f AH |
1033 | ret += PRINT_ATTR2(freq, inherit_stat); |
1034 | ret += PRINT_ATTR2(enable_on_exec, task); | |
1035 | ret += PRINT_ATTR2(watermark, precise_ip); | |
1036 | ret += PRINT_ATTR2(mmap_data, sample_id_all); | |
1037 | ret += PRINT_ATTR2(exclude_host, exclude_guest); | |
1038 | ret += PRINT_ATTR2N("excl.callchain_kern", exclude_callchain_kernel, | |
1039 | "excl.callchain_user", exclude_callchain_user); | |
1040 | ||
1041 | ret += PRINT_ATTR_U32(wakeup_events); | |
1042 | ret += PRINT_ATTR_U32(wakeup_watermark); | |
1043 | ret += PRINT_ATTR_X32(bp_type); | |
1044 | ret += PRINT_ATTR_X64(bp_addr); | |
1045 | ret += PRINT_ATTR_X64(config1); | |
1046 | ret += PRINT_ATTR_U64(bp_len); | |
1047 | ret += PRINT_ATTR_X64(config2); | |
1048 | ret += PRINT_ATTR_X64(branch_sample_type); | |
1049 | ret += PRINT_ATTR_X64(sample_regs_user); | |
1050 | ret += PRINT_ATTR_U32(sample_stack_user); | |
1051 | ||
1052 | ret += fprintf(fp, "%.60s\n", graph_dotted_line); | |
1053 | ||
1054 | return ret; | |
1055 | } | |
1056 | ||
0252208e | 1057 | static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 1058 | struct thread_map *threads) |
48290609 | 1059 | { |
bf8e8f4b | 1060 | int cpu, thread, nthreads; |
57480d2c | 1061 | unsigned long flags = PERF_FLAG_FD_CLOEXEC; |
727ab04e | 1062 | int pid = -1, err; |
bec19672 | 1063 | enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE; |
48290609 | 1064 | |
bf8e8f4b AH |
1065 | if (evsel->system_wide) |
1066 | nthreads = 1; | |
1067 | else | |
1068 | nthreads = threads->nr; | |
1069 | ||
0252208e | 1070 | if (evsel->fd == NULL && |
bf8e8f4b | 1071 | perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0) |
727ab04e | 1072 | return -ENOMEM; |
4eed11d5 | 1073 | |
023695d9 | 1074 | if (evsel->cgrp) { |
57480d2c | 1075 | flags |= PERF_FLAG_PID_CGROUP; |
023695d9 SE |
1076 | pid = evsel->cgrp->fd; |
1077 | } | |
1078 | ||
594ac61a | 1079 | fallback_missing_features: |
57480d2c YD |
1080 | if (perf_missing_features.cloexec) |
1081 | flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; | |
5c5e854b SE |
1082 | if (perf_missing_features.mmap2) |
1083 | evsel->attr.mmap2 = 0; | |
594ac61a ACM |
1084 | if (perf_missing_features.exclude_guest) |
1085 | evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; | |
1086 | retry_sample_id: | |
1087 | if (perf_missing_features.sample_id_all) | |
1088 | evsel->attr.sample_id_all = 0; | |
1089 | ||
e3e1a54f AH |
1090 | if (verbose >= 2) |
1091 | perf_event_attr__fprintf(&evsel->attr, stderr); | |
1092 | ||
86bd5e86 | 1093 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
9d04f178 | 1094 | |
bf8e8f4b | 1095 | for (thread = 0; thread < nthreads; thread++) { |
6a4bb04c | 1096 | int group_fd; |
023695d9 | 1097 | |
bf8e8f4b | 1098 | if (!evsel->cgrp && !evsel->system_wide) |
023695d9 SE |
1099 | pid = threads->map[thread]; |
1100 | ||
6a4bb04c | 1101 | group_fd = get_group_fd(evsel, cpu, thread); |
bec19672 | 1102 | retry_open: |
a33f6efc | 1103 | pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n", |
e3e1a54f AH |
1104 | pid, cpus->map[cpu], group_fd, flags); |
1105 | ||
0252208e | 1106 | FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr, |
023695d9 | 1107 | pid, |
f08199d3 | 1108 | cpus->map[cpu], |
023695d9 | 1109 | group_fd, flags); |
727ab04e ACM |
1110 | if (FD(evsel, cpu, thread) < 0) { |
1111 | err = -errno; | |
a33f6efc | 1112 | pr_debug2("sys_perf_event_open failed, error %d\n", |
f852fd62 | 1113 | err); |
594ac61a | 1114 | goto try_fallback; |
727ab04e | 1115 | } |
bec19672 | 1116 | set_rlimit = NO_CHANGE; |
0252208e | 1117 | } |
48290609 ACM |
1118 | } |
1119 | ||
1120 | return 0; | |
1121 | ||
594ac61a | 1122 | try_fallback: |
bec19672 AK |
1123 | /* |
1124 | * perf stat needs between 5 and 22 fds per CPU. When we run out | |
1125 | * of them try to increase the limits. | |
1126 | */ | |
1127 | if (err == -EMFILE && set_rlimit < INCREASED_MAX) { | |
1128 | struct rlimit l; | |
1129 | int old_errno = errno; | |
1130 | ||
1131 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1132 | if (set_rlimit == NO_CHANGE) | |
1133 | l.rlim_cur = l.rlim_max; | |
1134 | else { | |
1135 | l.rlim_cur = l.rlim_max + 1000; | |
1136 | l.rlim_max = l.rlim_cur; | |
1137 | } | |
1138 | if (setrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1139 | set_rlimit++; | |
1140 | errno = old_errno; | |
1141 | goto retry_open; | |
1142 | } | |
1143 | } | |
1144 | errno = old_errno; | |
1145 | } | |
1146 | ||
594ac61a ACM |
1147 | if (err != -EINVAL || cpu > 0 || thread > 0) |
1148 | goto out_close; | |
1149 | ||
57480d2c YD |
1150 | if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) { |
1151 | perf_missing_features.cloexec = true; | |
1152 | goto fallback_missing_features; | |
1153 | } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) { | |
5c5e854b SE |
1154 | perf_missing_features.mmap2 = true; |
1155 | goto fallback_missing_features; | |
1156 | } else if (!perf_missing_features.exclude_guest && | |
1157 | (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { | |
594ac61a ACM |
1158 | perf_missing_features.exclude_guest = true; |
1159 | goto fallback_missing_features; | |
1160 | } else if (!perf_missing_features.sample_id_all) { | |
1161 | perf_missing_features.sample_id_all = true; | |
1162 | goto retry_sample_id; | |
1163 | } | |
1164 | ||
48290609 | 1165 | out_close: |
0252208e ACM |
1166 | do { |
1167 | while (--thread >= 0) { | |
1168 | close(FD(evsel, cpu, thread)); | |
1169 | FD(evsel, cpu, thread) = -1; | |
1170 | } | |
bf8e8f4b | 1171 | thread = nthreads; |
0252208e | 1172 | } while (--cpu >= 0); |
727ab04e ACM |
1173 | return err; |
1174 | } | |
1175 | ||
1176 | void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads) | |
1177 | { | |
1178 | if (evsel->fd == NULL) | |
1179 | return; | |
1180 | ||
1181 | perf_evsel__close_fd(evsel, ncpus, nthreads); | |
1182 | perf_evsel__free_fd(evsel); | |
48290609 ACM |
1183 | } |
1184 | ||
0252208e ACM |
1185 | static struct { |
1186 | struct cpu_map map; | |
1187 | int cpus[1]; | |
1188 | } empty_cpu_map = { | |
1189 | .map.nr = 1, | |
1190 | .cpus = { -1, }, | |
1191 | }; | |
1192 | ||
1193 | static struct { | |
1194 | struct thread_map map; | |
1195 | int threads[1]; | |
1196 | } empty_thread_map = { | |
1197 | .map.nr = 1, | |
1198 | .threads = { -1, }, | |
1199 | }; | |
1200 | ||
f08199d3 | 1201 | int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 1202 | struct thread_map *threads) |
48290609 | 1203 | { |
0252208e ACM |
1204 | if (cpus == NULL) { |
1205 | /* Work around old compiler warnings about strict aliasing */ | |
1206 | cpus = &empty_cpu_map.map; | |
48290609 ACM |
1207 | } |
1208 | ||
0252208e ACM |
1209 | if (threads == NULL) |
1210 | threads = &empty_thread_map.map; | |
48290609 | 1211 | |
6a4bb04c | 1212 | return __perf_evsel__open(evsel, cpus, threads); |
48290609 ACM |
1213 | } |
1214 | ||
f08199d3 | 1215 | int perf_evsel__open_per_cpu(struct perf_evsel *evsel, |
6a4bb04c | 1216 | struct cpu_map *cpus) |
48290609 | 1217 | { |
6a4bb04c | 1218 | return __perf_evsel__open(evsel, cpus, &empty_thread_map.map); |
0252208e | 1219 | } |
48290609 | 1220 | |
f08199d3 | 1221 | int perf_evsel__open_per_thread(struct perf_evsel *evsel, |
6a4bb04c | 1222 | struct thread_map *threads) |
0252208e | 1223 | { |
6a4bb04c | 1224 | return __perf_evsel__open(evsel, &empty_cpu_map.map, threads); |
48290609 | 1225 | } |
70082dd9 | 1226 | |
0807d2d8 ACM |
1227 | static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel, |
1228 | const union perf_event *event, | |
1229 | struct perf_sample *sample) | |
d0dd74e8 | 1230 | { |
0807d2d8 | 1231 | u64 type = evsel->attr.sample_type; |
d0dd74e8 | 1232 | const u64 *array = event->sample.array; |
0807d2d8 | 1233 | bool swapped = evsel->needs_swap; |
37073f9e | 1234 | union u64_swap u; |
d0dd74e8 ACM |
1235 | |
1236 | array += ((event->header.size - | |
1237 | sizeof(event->header)) / sizeof(u64)) - 1; | |
1238 | ||
75562573 AH |
1239 | if (type & PERF_SAMPLE_IDENTIFIER) { |
1240 | sample->id = *array; | |
1241 | array--; | |
1242 | } | |
1243 | ||
d0dd74e8 | 1244 | if (type & PERF_SAMPLE_CPU) { |
37073f9e JO |
1245 | u.val64 = *array; |
1246 | if (swapped) { | |
1247 | /* undo swap of u64, then swap on individual u32s */ | |
1248 | u.val64 = bswap_64(u.val64); | |
1249 | u.val32[0] = bswap_32(u.val32[0]); | |
1250 | } | |
1251 | ||
1252 | sample->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1253 | array--; |
1254 | } | |
1255 | ||
1256 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1257 | sample->stream_id = *array; | |
1258 | array--; | |
1259 | } | |
1260 | ||
1261 | if (type & PERF_SAMPLE_ID) { | |
1262 | sample->id = *array; | |
1263 | array--; | |
1264 | } | |
1265 | ||
1266 | if (type & PERF_SAMPLE_TIME) { | |
1267 | sample->time = *array; | |
1268 | array--; | |
1269 | } | |
1270 | ||
1271 | if (type & PERF_SAMPLE_TID) { | |
37073f9e JO |
1272 | u.val64 = *array; |
1273 | if (swapped) { | |
1274 | /* undo swap of u64, then swap on individual u32s */ | |
1275 | u.val64 = bswap_64(u.val64); | |
1276 | u.val32[0] = bswap_32(u.val32[0]); | |
1277 | u.val32[1] = bswap_32(u.val32[1]); | |
1278 | } | |
1279 | ||
1280 | sample->pid = u.val32[0]; | |
1281 | sample->tid = u.val32[1]; | |
dd44bc6b | 1282 | array--; |
d0dd74e8 ACM |
1283 | } |
1284 | ||
1285 | return 0; | |
1286 | } | |
1287 | ||
03b6ea9b AH |
1288 | static inline bool overflow(const void *endp, u16 max_size, const void *offset, |
1289 | u64 size) | |
98e1da90 | 1290 | { |
03b6ea9b AH |
1291 | return size > max_size || offset + size > endp; |
1292 | } | |
98e1da90 | 1293 | |
03b6ea9b AH |
1294 | #define OVERFLOW_CHECK(offset, size, max_size) \ |
1295 | do { \ | |
1296 | if (overflow(endp, (max_size), (offset), (size))) \ | |
1297 | return -EFAULT; \ | |
1298 | } while (0) | |
98e1da90 | 1299 | |
03b6ea9b AH |
1300 | #define OVERFLOW_CHECK_u64(offset) \ |
1301 | OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64)) | |
98e1da90 | 1302 | |
a3f698fe | 1303 | int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, |
0807d2d8 | 1304 | struct perf_sample *data) |
d0dd74e8 | 1305 | { |
a3f698fe | 1306 | u64 type = evsel->attr.sample_type; |
0807d2d8 | 1307 | bool swapped = evsel->needs_swap; |
d0dd74e8 | 1308 | const u64 *array; |
03b6ea9b AH |
1309 | u16 max_size = event->header.size; |
1310 | const void *endp = (void *)event + max_size; | |
1311 | u64 sz; | |
d0dd74e8 | 1312 | |
936be503 DA |
1313 | /* |
1314 | * used for cross-endian analysis. See git commit 65014ab3 | |
1315 | * for why this goofiness is needed. | |
1316 | */ | |
6a11f92e | 1317 | union u64_swap u; |
936be503 | 1318 | |
f3bda2c9 | 1319 | memset(data, 0, sizeof(*data)); |
d0dd74e8 ACM |
1320 | data->cpu = data->pid = data->tid = -1; |
1321 | data->stream_id = data->id = data->time = -1ULL; | |
bc529086 | 1322 | data->period = evsel->attr.sample_period; |
05484298 | 1323 | data->weight = 0; |
d0dd74e8 ACM |
1324 | |
1325 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
a3f698fe | 1326 | if (!evsel->attr.sample_id_all) |
d0dd74e8 | 1327 | return 0; |
0807d2d8 | 1328 | return perf_evsel__parse_id_sample(evsel, event, data); |
d0dd74e8 ACM |
1329 | } |
1330 | ||
1331 | array = event->sample.array; | |
1332 | ||
03b6ea9b AH |
1333 | /* |
1334 | * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes | |
1335 | * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to | |
1336 | * check the format does not go past the end of the event. | |
1337 | */ | |
a3f698fe | 1338 | if (evsel->sample_size + sizeof(event->header) > event->header.size) |
a2854124 FW |
1339 | return -EFAULT; |
1340 | ||
75562573 AH |
1341 | data->id = -1ULL; |
1342 | if (type & PERF_SAMPLE_IDENTIFIER) { | |
1343 | data->id = *array; | |
1344 | array++; | |
1345 | } | |
1346 | ||
d0dd74e8 | 1347 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 1348 | data->ip = *array; |
d0dd74e8 ACM |
1349 | array++; |
1350 | } | |
1351 | ||
1352 | if (type & PERF_SAMPLE_TID) { | |
936be503 DA |
1353 | u.val64 = *array; |
1354 | if (swapped) { | |
1355 | /* undo swap of u64, then swap on individual u32s */ | |
1356 | u.val64 = bswap_64(u.val64); | |
1357 | u.val32[0] = bswap_32(u.val32[0]); | |
1358 | u.val32[1] = bswap_32(u.val32[1]); | |
1359 | } | |
1360 | ||
1361 | data->pid = u.val32[0]; | |
1362 | data->tid = u.val32[1]; | |
d0dd74e8 ACM |
1363 | array++; |
1364 | } | |
1365 | ||
1366 | if (type & PERF_SAMPLE_TIME) { | |
1367 | data->time = *array; | |
1368 | array++; | |
1369 | } | |
1370 | ||
7cec0922 | 1371 | data->addr = 0; |
d0dd74e8 ACM |
1372 | if (type & PERF_SAMPLE_ADDR) { |
1373 | data->addr = *array; | |
1374 | array++; | |
1375 | } | |
1376 | ||
d0dd74e8 ACM |
1377 | if (type & PERF_SAMPLE_ID) { |
1378 | data->id = *array; | |
1379 | array++; | |
1380 | } | |
1381 | ||
1382 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1383 | data->stream_id = *array; | |
1384 | array++; | |
1385 | } | |
1386 | ||
1387 | if (type & PERF_SAMPLE_CPU) { | |
936be503 DA |
1388 | |
1389 | u.val64 = *array; | |
1390 | if (swapped) { | |
1391 | /* undo swap of u64, then swap on individual u32s */ | |
1392 | u.val64 = bswap_64(u.val64); | |
1393 | u.val32[0] = bswap_32(u.val32[0]); | |
1394 | } | |
1395 | ||
1396 | data->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1397 | array++; |
1398 | } | |
1399 | ||
1400 | if (type & PERF_SAMPLE_PERIOD) { | |
1401 | data->period = *array; | |
1402 | array++; | |
1403 | } | |
1404 | ||
1405 | if (type & PERF_SAMPLE_READ) { | |
9ede473c JO |
1406 | u64 read_format = evsel->attr.read_format; |
1407 | ||
03b6ea9b | 1408 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1409 | if (read_format & PERF_FORMAT_GROUP) |
1410 | data->read.group.nr = *array; | |
1411 | else | |
1412 | data->read.one.value = *array; | |
1413 | ||
1414 | array++; | |
1415 | ||
1416 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
03b6ea9b | 1417 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1418 | data->read.time_enabled = *array; |
1419 | array++; | |
1420 | } | |
1421 | ||
1422 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
03b6ea9b | 1423 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1424 | data->read.time_running = *array; |
1425 | array++; | |
1426 | } | |
1427 | ||
1428 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1429 | if (read_format & PERF_FORMAT_GROUP) { | |
03b6ea9b AH |
1430 | const u64 max_group_nr = UINT64_MAX / |
1431 | sizeof(struct sample_read_value); | |
1432 | ||
1433 | if (data->read.group.nr > max_group_nr) | |
1434 | return -EFAULT; | |
1435 | sz = data->read.group.nr * | |
1436 | sizeof(struct sample_read_value); | |
1437 | OVERFLOW_CHECK(array, sz, max_size); | |
1438 | data->read.group.values = | |
1439 | (struct sample_read_value *)array; | |
1440 | array = (void *)array + sz; | |
9ede473c | 1441 | } else { |
03b6ea9b | 1442 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1443 | data->read.one.id = *array; |
1444 | array++; | |
1445 | } | |
d0dd74e8 ACM |
1446 | } |
1447 | ||
1448 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
03b6ea9b | 1449 | const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); |
98e1da90 | 1450 | |
03b6ea9b AH |
1451 | OVERFLOW_CHECK_u64(array); |
1452 | data->callchain = (struct ip_callchain *)array++; | |
1453 | if (data->callchain->nr > max_callchain_nr) | |
98e1da90 | 1454 | return -EFAULT; |
03b6ea9b AH |
1455 | sz = data->callchain->nr * sizeof(u64); |
1456 | OVERFLOW_CHECK(array, sz, max_size); | |
1457 | array = (void *)array + sz; | |
d0dd74e8 ACM |
1458 | } |
1459 | ||
1460 | if (type & PERF_SAMPLE_RAW) { | |
03b6ea9b | 1461 | OVERFLOW_CHECK_u64(array); |
936be503 DA |
1462 | u.val64 = *array; |
1463 | if (WARN_ONCE(swapped, | |
1464 | "Endianness of raw data not corrected!\n")) { | |
1465 | /* undo swap of u64, then swap on individual u32s */ | |
1466 | u.val64 = bswap_64(u.val64); | |
1467 | u.val32[0] = bswap_32(u.val32[0]); | |
1468 | u.val32[1] = bswap_32(u.val32[1]); | |
1469 | } | |
936be503 | 1470 | data->raw_size = u.val32[0]; |
03b6ea9b | 1471 | array = (void *)array + sizeof(u32); |
98e1da90 | 1472 | |
03b6ea9b AH |
1473 | OVERFLOW_CHECK(array, data->raw_size, max_size); |
1474 | data->raw_data = (void *)array; | |
1475 | array = (void *)array + data->raw_size; | |
d0dd74e8 ACM |
1476 | } |
1477 | ||
b5387528 | 1478 | if (type & PERF_SAMPLE_BRANCH_STACK) { |
03b6ea9b AH |
1479 | const u64 max_branch_nr = UINT64_MAX / |
1480 | sizeof(struct branch_entry); | |
b5387528 | 1481 | |
03b6ea9b AH |
1482 | OVERFLOW_CHECK_u64(array); |
1483 | data->branch_stack = (struct branch_stack *)array++; | |
b5387528 | 1484 | |
03b6ea9b AH |
1485 | if (data->branch_stack->nr > max_branch_nr) |
1486 | return -EFAULT; | |
b5387528 | 1487 | sz = data->branch_stack->nr * sizeof(struct branch_entry); |
03b6ea9b AH |
1488 | OVERFLOW_CHECK(array, sz, max_size); |
1489 | array = (void *)array + sz; | |
b5387528 | 1490 | } |
0f6a3015 JO |
1491 | |
1492 | if (type & PERF_SAMPLE_REGS_USER) { | |
03b6ea9b | 1493 | OVERFLOW_CHECK_u64(array); |
5b95a4a3 AH |
1494 | data->user_regs.abi = *array; |
1495 | array++; | |
0f6a3015 | 1496 | |
5b95a4a3 | 1497 | if (data->user_regs.abi) { |
352ea45a | 1498 | u64 mask = evsel->attr.sample_regs_user; |
03b6ea9b | 1499 | |
352ea45a | 1500 | sz = hweight_long(mask) * sizeof(u64); |
03b6ea9b | 1501 | OVERFLOW_CHECK(array, sz, max_size); |
352ea45a | 1502 | data->user_regs.mask = mask; |
0f6a3015 | 1503 | data->user_regs.regs = (u64 *)array; |
03b6ea9b | 1504 | array = (void *)array + sz; |
0f6a3015 JO |
1505 | } |
1506 | } | |
1507 | ||
1508 | if (type & PERF_SAMPLE_STACK_USER) { | |
03b6ea9b AH |
1509 | OVERFLOW_CHECK_u64(array); |
1510 | sz = *array++; | |
0f6a3015 JO |
1511 | |
1512 | data->user_stack.offset = ((char *)(array - 1) | |
1513 | - (char *) event); | |
1514 | ||
03b6ea9b | 1515 | if (!sz) { |
0f6a3015 JO |
1516 | data->user_stack.size = 0; |
1517 | } else { | |
03b6ea9b | 1518 | OVERFLOW_CHECK(array, sz, max_size); |
0f6a3015 | 1519 | data->user_stack.data = (char *)array; |
03b6ea9b AH |
1520 | array = (void *)array + sz; |
1521 | OVERFLOW_CHECK_u64(array); | |
54bd2692 | 1522 | data->user_stack.size = *array++; |
a65cb4b9 JO |
1523 | if (WARN_ONCE(data->user_stack.size > sz, |
1524 | "user stack dump failure\n")) | |
1525 | return -EFAULT; | |
0f6a3015 JO |
1526 | } |
1527 | } | |
1528 | ||
05484298 AK |
1529 | data->weight = 0; |
1530 | if (type & PERF_SAMPLE_WEIGHT) { | |
03b6ea9b | 1531 | OVERFLOW_CHECK_u64(array); |
05484298 AK |
1532 | data->weight = *array; |
1533 | array++; | |
1534 | } | |
1535 | ||
98a3b32c SE |
1536 | data->data_src = PERF_MEM_DATA_SRC_NONE; |
1537 | if (type & PERF_SAMPLE_DATA_SRC) { | |
03b6ea9b | 1538 | OVERFLOW_CHECK_u64(array); |
98a3b32c SE |
1539 | data->data_src = *array; |
1540 | array++; | |
1541 | } | |
1542 | ||
475eeab9 AK |
1543 | data->transaction = 0; |
1544 | if (type & PERF_SAMPLE_TRANSACTION) { | |
87b95524 | 1545 | OVERFLOW_CHECK_u64(array); |
475eeab9 AK |
1546 | data->transaction = *array; |
1547 | array++; | |
1548 | } | |
1549 | ||
d0dd74e8 ACM |
1550 | return 0; |
1551 | } | |
74eec26f | 1552 | |
b1cf6f65 | 1553 | size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, |
352ea45a | 1554 | u64 read_format) |
b1cf6f65 AH |
1555 | { |
1556 | size_t sz, result = sizeof(struct sample_event); | |
1557 | ||
1558 | if (type & PERF_SAMPLE_IDENTIFIER) | |
1559 | result += sizeof(u64); | |
1560 | ||
1561 | if (type & PERF_SAMPLE_IP) | |
1562 | result += sizeof(u64); | |
1563 | ||
1564 | if (type & PERF_SAMPLE_TID) | |
1565 | result += sizeof(u64); | |
1566 | ||
1567 | if (type & PERF_SAMPLE_TIME) | |
1568 | result += sizeof(u64); | |
1569 | ||
1570 | if (type & PERF_SAMPLE_ADDR) | |
1571 | result += sizeof(u64); | |
1572 | ||
1573 | if (type & PERF_SAMPLE_ID) | |
1574 | result += sizeof(u64); | |
1575 | ||
1576 | if (type & PERF_SAMPLE_STREAM_ID) | |
1577 | result += sizeof(u64); | |
1578 | ||
1579 | if (type & PERF_SAMPLE_CPU) | |
1580 | result += sizeof(u64); | |
1581 | ||
1582 | if (type & PERF_SAMPLE_PERIOD) | |
1583 | result += sizeof(u64); | |
1584 | ||
1585 | if (type & PERF_SAMPLE_READ) { | |
1586 | result += sizeof(u64); | |
1587 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
1588 | result += sizeof(u64); | |
1589 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
1590 | result += sizeof(u64); | |
1591 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1592 | if (read_format & PERF_FORMAT_GROUP) { | |
1593 | sz = sample->read.group.nr * | |
1594 | sizeof(struct sample_read_value); | |
1595 | result += sz; | |
1596 | } else { | |
1597 | result += sizeof(u64); | |
1598 | } | |
1599 | } | |
1600 | ||
1601 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
1602 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
1603 | result += sz; | |
1604 | } | |
1605 | ||
1606 | if (type & PERF_SAMPLE_RAW) { | |
1607 | result += sizeof(u32); | |
1608 | result += sample->raw_size; | |
1609 | } | |
1610 | ||
1611 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
1612 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
1613 | sz += sizeof(u64); | |
1614 | result += sz; | |
1615 | } | |
1616 | ||
1617 | if (type & PERF_SAMPLE_REGS_USER) { | |
1618 | if (sample->user_regs.abi) { | |
1619 | result += sizeof(u64); | |
352ea45a | 1620 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
b1cf6f65 AH |
1621 | result += sz; |
1622 | } else { | |
1623 | result += sizeof(u64); | |
1624 | } | |
1625 | } | |
1626 | ||
1627 | if (type & PERF_SAMPLE_STACK_USER) { | |
1628 | sz = sample->user_stack.size; | |
1629 | result += sizeof(u64); | |
1630 | if (sz) { | |
1631 | result += sz; | |
1632 | result += sizeof(u64); | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | if (type & PERF_SAMPLE_WEIGHT) | |
1637 | result += sizeof(u64); | |
1638 | ||
1639 | if (type & PERF_SAMPLE_DATA_SRC) | |
1640 | result += sizeof(u64); | |
1641 | ||
42d88910 AH |
1642 | if (type & PERF_SAMPLE_TRANSACTION) |
1643 | result += sizeof(u64); | |
1644 | ||
b1cf6f65 AH |
1645 | return result; |
1646 | } | |
1647 | ||
74eec26f | 1648 | int perf_event__synthesize_sample(union perf_event *event, u64 type, |
352ea45a | 1649 | u64 read_format, |
74eec26f AV |
1650 | const struct perf_sample *sample, |
1651 | bool swapped) | |
1652 | { | |
1653 | u64 *array; | |
d03f2170 | 1654 | size_t sz; |
74eec26f AV |
1655 | /* |
1656 | * used for cross-endian analysis. See git commit 65014ab3 | |
1657 | * for why this goofiness is needed. | |
1658 | */ | |
6a11f92e | 1659 | union u64_swap u; |
74eec26f AV |
1660 | |
1661 | array = event->sample.array; | |
1662 | ||
75562573 AH |
1663 | if (type & PERF_SAMPLE_IDENTIFIER) { |
1664 | *array = sample->id; | |
1665 | array++; | |
1666 | } | |
1667 | ||
74eec26f | 1668 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 1669 | *array = sample->ip; |
74eec26f AV |
1670 | array++; |
1671 | } | |
1672 | ||
1673 | if (type & PERF_SAMPLE_TID) { | |
1674 | u.val32[0] = sample->pid; | |
1675 | u.val32[1] = sample->tid; | |
1676 | if (swapped) { | |
1677 | /* | |
a3f698fe | 1678 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
1679 | */ |
1680 | u.val32[0] = bswap_32(u.val32[0]); | |
1681 | u.val32[1] = bswap_32(u.val32[1]); | |
1682 | u.val64 = bswap_64(u.val64); | |
1683 | } | |
1684 | ||
1685 | *array = u.val64; | |
1686 | array++; | |
1687 | } | |
1688 | ||
1689 | if (type & PERF_SAMPLE_TIME) { | |
1690 | *array = sample->time; | |
1691 | array++; | |
1692 | } | |
1693 | ||
1694 | if (type & PERF_SAMPLE_ADDR) { | |
1695 | *array = sample->addr; | |
1696 | array++; | |
1697 | } | |
1698 | ||
1699 | if (type & PERF_SAMPLE_ID) { | |
1700 | *array = sample->id; | |
1701 | array++; | |
1702 | } | |
1703 | ||
1704 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1705 | *array = sample->stream_id; | |
1706 | array++; | |
1707 | } | |
1708 | ||
1709 | if (type & PERF_SAMPLE_CPU) { | |
1710 | u.val32[0] = sample->cpu; | |
1711 | if (swapped) { | |
1712 | /* | |
a3f698fe | 1713 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
1714 | */ |
1715 | u.val32[0] = bswap_32(u.val32[0]); | |
1716 | u.val64 = bswap_64(u.val64); | |
1717 | } | |
1718 | *array = u.val64; | |
1719 | array++; | |
1720 | } | |
1721 | ||
1722 | if (type & PERF_SAMPLE_PERIOD) { | |
1723 | *array = sample->period; | |
1724 | array++; | |
1725 | } | |
1726 | ||
d03f2170 AH |
1727 | if (type & PERF_SAMPLE_READ) { |
1728 | if (read_format & PERF_FORMAT_GROUP) | |
1729 | *array = sample->read.group.nr; | |
1730 | else | |
1731 | *array = sample->read.one.value; | |
1732 | array++; | |
1733 | ||
1734 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
1735 | *array = sample->read.time_enabled; | |
1736 | array++; | |
1737 | } | |
1738 | ||
1739 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
1740 | *array = sample->read.time_running; | |
1741 | array++; | |
1742 | } | |
1743 | ||
1744 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1745 | if (read_format & PERF_FORMAT_GROUP) { | |
1746 | sz = sample->read.group.nr * | |
1747 | sizeof(struct sample_read_value); | |
1748 | memcpy(array, sample->read.group.values, sz); | |
1749 | array = (void *)array + sz; | |
1750 | } else { | |
1751 | *array = sample->read.one.id; | |
1752 | array++; | |
1753 | } | |
1754 | } | |
1755 | ||
1756 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
1757 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
1758 | memcpy(array, sample->callchain, sz); | |
1759 | array = (void *)array + sz; | |
1760 | } | |
1761 | ||
1762 | if (type & PERF_SAMPLE_RAW) { | |
1763 | u.val32[0] = sample->raw_size; | |
1764 | if (WARN_ONCE(swapped, | |
1765 | "Endianness of raw data not corrected!\n")) { | |
1766 | /* | |
1767 | * Inverse of what is done in perf_evsel__parse_sample | |
1768 | */ | |
1769 | u.val32[0] = bswap_32(u.val32[0]); | |
1770 | u.val32[1] = bswap_32(u.val32[1]); | |
1771 | u.val64 = bswap_64(u.val64); | |
1772 | } | |
1773 | *array = u.val64; | |
1774 | array = (void *)array + sizeof(u32); | |
1775 | ||
1776 | memcpy(array, sample->raw_data, sample->raw_size); | |
1777 | array = (void *)array + sample->raw_size; | |
1778 | } | |
1779 | ||
1780 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
1781 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
1782 | sz += sizeof(u64); | |
1783 | memcpy(array, sample->branch_stack, sz); | |
1784 | array = (void *)array + sz; | |
1785 | } | |
1786 | ||
1787 | if (type & PERF_SAMPLE_REGS_USER) { | |
1788 | if (sample->user_regs.abi) { | |
1789 | *array++ = sample->user_regs.abi; | |
352ea45a | 1790 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
d03f2170 AH |
1791 | memcpy(array, sample->user_regs.regs, sz); |
1792 | array = (void *)array + sz; | |
1793 | } else { | |
1794 | *array++ = 0; | |
1795 | } | |
1796 | } | |
1797 | ||
1798 | if (type & PERF_SAMPLE_STACK_USER) { | |
1799 | sz = sample->user_stack.size; | |
1800 | *array++ = sz; | |
1801 | if (sz) { | |
1802 | memcpy(array, sample->user_stack.data, sz); | |
1803 | array = (void *)array + sz; | |
1804 | *array++ = sz; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | if (type & PERF_SAMPLE_WEIGHT) { | |
1809 | *array = sample->weight; | |
1810 | array++; | |
1811 | } | |
1812 | ||
1813 | if (type & PERF_SAMPLE_DATA_SRC) { | |
1814 | *array = sample->data_src; | |
1815 | array++; | |
1816 | } | |
1817 | ||
42d88910 AH |
1818 | if (type & PERF_SAMPLE_TRANSACTION) { |
1819 | *array = sample->transaction; | |
1820 | array++; | |
1821 | } | |
1822 | ||
74eec26f AV |
1823 | return 0; |
1824 | } | |
5555ded4 | 1825 | |
efd2b924 ACM |
1826 | struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name) |
1827 | { | |
1828 | return pevent_find_field(evsel->tp_format, name); | |
1829 | } | |
1830 | ||
5d2074ea | 1831 | void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample, |
5555ded4 ACM |
1832 | const char *name) |
1833 | { | |
efd2b924 | 1834 | struct format_field *field = perf_evsel__field(evsel, name); |
5555ded4 ACM |
1835 | int offset; |
1836 | ||
efd2b924 ACM |
1837 | if (!field) |
1838 | return NULL; | |
5555ded4 ACM |
1839 | |
1840 | offset = field->offset; | |
1841 | ||
1842 | if (field->flags & FIELD_IS_DYNAMIC) { | |
1843 | offset = *(int *)(sample->raw_data + field->offset); | |
1844 | offset &= 0xffff; | |
1845 | } | |
1846 | ||
1847 | return sample->raw_data + offset; | |
1848 | } | |
1849 | ||
1850 | u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample, | |
1851 | const char *name) | |
1852 | { | |
efd2b924 | 1853 | struct format_field *field = perf_evsel__field(evsel, name); |
e6b6f679 ACM |
1854 | void *ptr; |
1855 | u64 value; | |
5555ded4 | 1856 | |
efd2b924 ACM |
1857 | if (!field) |
1858 | return 0; | |
5555ded4 | 1859 | |
e6b6f679 | 1860 | ptr = sample->raw_data + field->offset; |
5555ded4 | 1861 | |
e6b6f679 ACM |
1862 | switch (field->size) { |
1863 | case 1: | |
1864 | return *(u8 *)ptr; | |
1865 | case 2: | |
1866 | value = *(u16 *)ptr; | |
1867 | break; | |
1868 | case 4: | |
1869 | value = *(u32 *)ptr; | |
1870 | break; | |
1871 | case 8: | |
1872 | value = *(u64 *)ptr; | |
1873 | break; | |
1874 | default: | |
1875 | return 0; | |
1876 | } | |
1877 | ||
1878 | if (!evsel->needs_swap) | |
1879 | return value; | |
1880 | ||
1881 | switch (field->size) { | |
1882 | case 2: | |
1883 | return bswap_16(value); | |
1884 | case 4: | |
1885 | return bswap_32(value); | |
1886 | case 8: | |
1887 | return bswap_64(value); | |
1888 | default: | |
1889 | return 0; | |
1890 | } | |
1891 | ||
1892 | return 0; | |
5555ded4 | 1893 | } |
0698aedd ACM |
1894 | |
1895 | static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...) | |
1896 | { | |
1897 | va_list args; | |
1898 | int ret = 0; | |
1899 | ||
1900 | if (!*first) { | |
1901 | ret += fprintf(fp, ","); | |
1902 | } else { | |
1903 | ret += fprintf(fp, ":"); | |
1904 | *first = false; | |
1905 | } | |
1906 | ||
1907 | va_start(args, fmt); | |
1908 | ret += vfprintf(fp, fmt, args); | |
1909 | va_end(args); | |
1910 | return ret; | |
1911 | } | |
1912 | ||
1913 | static int __if_fprintf(FILE *fp, bool *first, const char *field, u64 value) | |
1914 | { | |
1915 | if (value == 0) | |
1916 | return 0; | |
1917 | ||
1918 | return comma_fprintf(fp, first, " %s: %" PRIu64, field, value); | |
1919 | } | |
1920 | ||
1921 | #define if_print(field) printed += __if_fprintf(fp, &first, #field, evsel->attr.field) | |
1922 | ||
c79a4393 ACM |
1923 | struct bit_names { |
1924 | int bit; | |
1925 | const char *name; | |
1926 | }; | |
1927 | ||
1928 | static int bits__fprintf(FILE *fp, const char *field, u64 value, | |
1929 | struct bit_names *bits, bool *first) | |
1930 | { | |
1931 | int i = 0, printed = comma_fprintf(fp, first, " %s: ", field); | |
1932 | bool first_bit = true; | |
1933 | ||
1934 | do { | |
1935 | if (value & bits[i].bit) { | |
1936 | printed += fprintf(fp, "%s%s", first_bit ? "" : "|", bits[i].name); | |
1937 | first_bit = false; | |
1938 | } | |
1939 | } while (bits[++i].name != NULL); | |
1940 | ||
1941 | return printed; | |
1942 | } | |
1943 | ||
1944 | static int sample_type__fprintf(FILE *fp, bool *first, u64 value) | |
1945 | { | |
1946 | #define bit_name(n) { PERF_SAMPLE_##n, #n } | |
1947 | struct bit_names bits[] = { | |
1948 | bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR), | |
1949 | bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU), | |
1950 | bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW), | |
1951 | bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER), | |
75562573 | 1952 | bit_name(IDENTIFIER), |
c79a4393 ACM |
1953 | { .name = NULL, } |
1954 | }; | |
1955 | #undef bit_name | |
1956 | return bits__fprintf(fp, "sample_type", value, bits, first); | |
1957 | } | |
1958 | ||
1959 | static int read_format__fprintf(FILE *fp, bool *first, u64 value) | |
1960 | { | |
1961 | #define bit_name(n) { PERF_FORMAT_##n, #n } | |
1962 | struct bit_names bits[] = { | |
1963 | bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING), | |
1964 | bit_name(ID), bit_name(GROUP), | |
1965 | { .name = NULL, } | |
1966 | }; | |
1967 | #undef bit_name | |
1968 | return bits__fprintf(fp, "read_format", value, bits, first); | |
1969 | } | |
1970 | ||
0698aedd ACM |
1971 | int perf_evsel__fprintf(struct perf_evsel *evsel, |
1972 | struct perf_attr_details *details, FILE *fp) | |
1973 | { | |
1974 | bool first = true; | |
e6ab07d0 NK |
1975 | int printed = 0; |
1976 | ||
e35ef355 | 1977 | if (details->event_group) { |
e6ab07d0 NK |
1978 | struct perf_evsel *pos; |
1979 | ||
1980 | if (!perf_evsel__is_group_leader(evsel)) | |
1981 | return 0; | |
1982 | ||
1983 | if (evsel->nr_members > 1) | |
1984 | printed += fprintf(fp, "%s{", evsel->group_name ?: ""); | |
1985 | ||
1986 | printed += fprintf(fp, "%s", perf_evsel__name(evsel)); | |
1987 | for_each_group_member(pos, evsel) | |
1988 | printed += fprintf(fp, ",%s", perf_evsel__name(pos)); | |
1989 | ||
1990 | if (evsel->nr_members > 1) | |
1991 | printed += fprintf(fp, "}"); | |
1992 | goto out; | |
1993 | } | |
1994 | ||
1995 | printed += fprintf(fp, "%s", perf_evsel__name(evsel)); | |
0698aedd ACM |
1996 | |
1997 | if (details->verbose || details->freq) { | |
1998 | printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64, | |
1999 | (u64)evsel->attr.sample_freq); | |
2000 | } | |
2001 | ||
2002 | if (details->verbose) { | |
2003 | if_print(type); | |
2004 | if_print(config); | |
2005 | if_print(config1); | |
2006 | if_print(config2); | |
2007 | if_print(size); | |
c79a4393 ACM |
2008 | printed += sample_type__fprintf(fp, &first, evsel->attr.sample_type); |
2009 | if (evsel->attr.read_format) | |
2010 | printed += read_format__fprintf(fp, &first, evsel->attr.read_format); | |
0698aedd ACM |
2011 | if_print(disabled); |
2012 | if_print(inherit); | |
2013 | if_print(pinned); | |
2014 | if_print(exclusive); | |
2015 | if_print(exclude_user); | |
2016 | if_print(exclude_kernel); | |
2017 | if_print(exclude_hv); | |
2018 | if_print(exclude_idle); | |
2019 | if_print(mmap); | |
5c5e854b | 2020 | if_print(mmap2); |
0698aedd | 2021 | if_print(comm); |
022c50d0 | 2022 | if_print(comm_exec); |
0698aedd ACM |
2023 | if_print(freq); |
2024 | if_print(inherit_stat); | |
2025 | if_print(enable_on_exec); | |
2026 | if_print(task); | |
2027 | if_print(watermark); | |
2028 | if_print(precise_ip); | |
2029 | if_print(mmap_data); | |
2030 | if_print(sample_id_all); | |
2031 | if_print(exclude_host); | |
2032 | if_print(exclude_guest); | |
2033 | if_print(__reserved_1); | |
2034 | if_print(wakeup_events); | |
2035 | if_print(bp_type); | |
2036 | if_print(branch_sample_type); | |
2037 | } | |
e6ab07d0 | 2038 | out: |
0698aedd ACM |
2039 | fputc('\n', fp); |
2040 | return ++printed; | |
2041 | } | |
c0a54341 ACM |
2042 | |
2043 | bool perf_evsel__fallback(struct perf_evsel *evsel, int err, | |
2044 | char *msg, size_t msgsize) | |
2045 | { | |
2b821cce | 2046 | if ((err == ENOENT || err == ENXIO || err == ENODEV) && |
c0a54341 ACM |
2047 | evsel->attr.type == PERF_TYPE_HARDWARE && |
2048 | evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) { | |
2049 | /* | |
2050 | * If it's cycles then fall back to hrtimer based | |
2051 | * cpu-clock-tick sw counter, which is always available even if | |
2052 | * no PMU support. | |
2053 | * | |
2054 | * PPC returns ENXIO until 2.6.37 (behavior changed with commit | |
2055 | * b0a873e). | |
2056 | */ | |
2057 | scnprintf(msg, msgsize, "%s", | |
2058 | "The cycles event is not supported, trying to fall back to cpu-clock-ticks"); | |
2059 | ||
2060 | evsel->attr.type = PERF_TYPE_SOFTWARE; | |
2061 | evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK; | |
2062 | ||
04662523 | 2063 | zfree(&evsel->name); |
c0a54341 ACM |
2064 | return true; |
2065 | } | |
2066 | ||
2067 | return false; | |
2068 | } | |
56e52e85 | 2069 | |
602ad878 | 2070 | int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, |
56e52e85 ACM |
2071 | int err, char *msg, size_t size) |
2072 | { | |
6e81c74c MH |
2073 | char sbuf[STRERR_BUFSIZE]; |
2074 | ||
56e52e85 ACM |
2075 | switch (err) { |
2076 | case EPERM: | |
2077 | case EACCES: | |
b69e63a4 | 2078 | return scnprintf(msg, size, |
56e52e85 ACM |
2079 | "You may not have permission to collect %sstats.\n" |
2080 | "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n" | |
2081 | " -1 - Not paranoid at all\n" | |
2082 | " 0 - Disallow raw tracepoint access for unpriv\n" | |
2083 | " 1 - Disallow cpu events for unpriv\n" | |
2084 | " 2 - Disallow kernel profiling for unpriv", | |
2085 | target->system_wide ? "system-wide " : ""); | |
2086 | case ENOENT: | |
2087 | return scnprintf(msg, size, "The %s event is not supported.", | |
2088 | perf_evsel__name(evsel)); | |
2089 | case EMFILE: | |
2090 | return scnprintf(msg, size, "%s", | |
2091 | "Too many events are opened.\n" | |
2092 | "Try again after reducing the number of events."); | |
2093 | case ENODEV: | |
2094 | if (target->cpu_list) | |
2095 | return scnprintf(msg, size, "%s", | |
2096 | "No such device - did you specify an out-of-range profile CPU?\n"); | |
2097 | break; | |
2098 | case EOPNOTSUPP: | |
2099 | if (evsel->attr.precise_ip) | |
2100 | return scnprintf(msg, size, "%s", | |
2101 | "\'precise\' request may not be supported. Try removing 'p' modifier."); | |
2102 | #if defined(__i386__) || defined(__x86_64__) | |
2103 | if (evsel->attr.type == PERF_TYPE_HARDWARE) | |
2104 | return scnprintf(msg, size, "%s", | |
2105 | "No hardware sampling interrupt available.\n" | |
2106 | "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it."); | |
2107 | #endif | |
2108 | break; | |
63914aca JO |
2109 | case EBUSY: |
2110 | if (find_process("oprofiled")) | |
2111 | return scnprintf(msg, size, | |
2112 | "The PMU counters are busy/taken by another profiler.\n" | |
2113 | "We found oprofile daemon running, please stop it and try again."); | |
2114 | break; | |
56e52e85 ACM |
2115 | default: |
2116 | break; | |
2117 | } | |
2118 | ||
2119 | return scnprintf(msg, size, | |
6e81c74c | 2120 | "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" |
56e52e85 ACM |
2121 | "/bin/dmesg may provide additional information.\n" |
2122 | "No CONFIG_PERF_EVENTS=y kernel support configured?\n", | |
6e81c74c MH |
2123 | err, strerror_r(err, sbuf, sizeof(sbuf)), |
2124 | perf_evsel__name(evsel)); | |
56e52e85 | 2125 | } |