Commit | Line | Data |
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f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
9 | ||
936be503 | 10 | #include <byteswap.h> |
0f6a3015 | 11 | #include <linux/bitops.h> |
4605eab3 | 12 | #include <api/fs/tracing_path.h> |
4e319027 RR |
13 | #include <traceevent/event-parse.h> |
14 | #include <linux/hw_breakpoint.h> | |
15 | #include <linux/perf_event.h> | |
8dd2a131 | 16 | #include <linux/err.h> |
bec19672 | 17 | #include <sys/resource.h> |
4e319027 | 18 | #include "asm/bug.h" |
8f651eae | 19 | #include "callchain.h" |
f14d5707 | 20 | #include "cgroup.h" |
69aad6f1 | 21 | #include "evsel.h" |
70082dd9 | 22 | #include "evlist.h" |
69aad6f1 | 23 | #include "util.h" |
86bd5e86 | 24 | #include "cpumap.h" |
fd78260b | 25 | #include "thread_map.h" |
12864b31 | 26 | #include "target.h" |
26d33022 | 27 | #include "perf_regs.h" |
e3e1a54f | 28 | #include "debug.h" |
97978b3e | 29 | #include "trace-event.h" |
a9a3a4d9 | 30 | #include "stat.h" |
69aad6f1 | 31 | |
594ac61a ACM |
32 | static struct { |
33 | bool sample_id_all; | |
34 | bool exclude_guest; | |
5c5e854b | 35 | bool mmap2; |
57480d2c | 36 | bool cloexec; |
814c8c38 PZ |
37 | bool clockid; |
38 | bool clockid_wrong; | |
bd0f8895 | 39 | bool lbr_flags; |
b90dc17a | 40 | bool write_backward; |
594ac61a ACM |
41 | } perf_missing_features; |
42 | ||
814c8c38 PZ |
43 | static clockid_t clockid; |
44 | ||
ce8ccff5 ACM |
45 | static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused) |
46 | { | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused) | |
51 | { | |
52 | } | |
53 | ||
54 | static struct { | |
55 | size_t size; | |
56 | int (*init)(struct perf_evsel *evsel); | |
57 | void (*fini)(struct perf_evsel *evsel); | |
58 | } perf_evsel__object = { | |
59 | .size = sizeof(struct perf_evsel), | |
60 | .init = perf_evsel__no_extra_init, | |
61 | .fini = perf_evsel__no_extra_fini, | |
62 | }; | |
63 | ||
64 | int perf_evsel__object_config(size_t object_size, | |
65 | int (*init)(struct perf_evsel *evsel), | |
66 | void (*fini)(struct perf_evsel *evsel)) | |
67 | { | |
68 | ||
69 | if (object_size == 0) | |
70 | goto set_methods; | |
71 | ||
72 | if (perf_evsel__object.size > object_size) | |
73 | return -EINVAL; | |
74 | ||
75 | perf_evsel__object.size = object_size; | |
76 | ||
77 | set_methods: | |
78 | if (init != NULL) | |
79 | perf_evsel__object.init = init; | |
80 | ||
81 | if (fini != NULL) | |
82 | perf_evsel__object.fini = fini; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
c52b12ed ACM |
87 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
88 | ||
75562573 | 89 | int __perf_evsel__sample_size(u64 sample_type) |
c2a70653 ACM |
90 | { |
91 | u64 mask = sample_type & PERF_SAMPLE_MASK; | |
92 | int size = 0; | |
93 | int i; | |
94 | ||
95 | for (i = 0; i < 64; i++) { | |
96 | if (mask & (1ULL << i)) | |
97 | size++; | |
98 | } | |
99 | ||
100 | size *= sizeof(u64); | |
101 | ||
102 | return size; | |
103 | } | |
104 | ||
75562573 AH |
105 | /** |
106 | * __perf_evsel__calc_id_pos - calculate id_pos. | |
107 | * @sample_type: sample type | |
108 | * | |
109 | * This function returns the position of the event id (PERF_SAMPLE_ID or | |
110 | * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct | |
111 | * sample_event. | |
112 | */ | |
113 | static int __perf_evsel__calc_id_pos(u64 sample_type) | |
114 | { | |
115 | int idx = 0; | |
116 | ||
117 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
118 | return 0; | |
119 | ||
120 | if (!(sample_type & PERF_SAMPLE_ID)) | |
121 | return -1; | |
122 | ||
123 | if (sample_type & PERF_SAMPLE_IP) | |
124 | idx += 1; | |
125 | ||
126 | if (sample_type & PERF_SAMPLE_TID) | |
127 | idx += 1; | |
128 | ||
129 | if (sample_type & PERF_SAMPLE_TIME) | |
130 | idx += 1; | |
131 | ||
132 | if (sample_type & PERF_SAMPLE_ADDR) | |
133 | idx += 1; | |
134 | ||
135 | return idx; | |
136 | } | |
137 | ||
138 | /** | |
139 | * __perf_evsel__calc_is_pos - calculate is_pos. | |
140 | * @sample_type: sample type | |
141 | * | |
142 | * This function returns the position (counting backwards) of the event id | |
143 | * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if | |
144 | * sample_id_all is used there is an id sample appended to non-sample events. | |
145 | */ | |
146 | static int __perf_evsel__calc_is_pos(u64 sample_type) | |
147 | { | |
148 | int idx = 1; | |
149 | ||
150 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
151 | return 1; | |
152 | ||
153 | if (!(sample_type & PERF_SAMPLE_ID)) | |
154 | return -1; | |
155 | ||
156 | if (sample_type & PERF_SAMPLE_CPU) | |
157 | idx += 1; | |
158 | ||
159 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
160 | idx += 1; | |
161 | ||
162 | return idx; | |
163 | } | |
164 | ||
165 | void perf_evsel__calc_id_pos(struct perf_evsel *evsel) | |
166 | { | |
167 | evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type); | |
168 | evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type); | |
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; | |
d49e4695 | 212 | evsel->evlist = NULL; |
1f45b1d4 | 213 | evsel->bpf_fd = -1; |
ef1d1af2 | 214 | INIT_LIST_HEAD(&evsel->node); |
930a2e29 | 215 | INIT_LIST_HEAD(&evsel->config_terms); |
ce8ccff5 | 216 | perf_evsel__object.init(evsel); |
bde09467 | 217 | evsel->sample_size = __perf_evsel__sample_size(attr->sample_type); |
75562573 | 218 | perf_evsel__calc_id_pos(evsel); |
15bfd2cc | 219 | evsel->cmdline_group_boundary = false; |
ef1d1af2 ACM |
220 | } |
221 | ||
ef503831 | 222 | struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) |
69aad6f1 | 223 | { |
ce8ccff5 | 224 | struct perf_evsel *evsel = zalloc(perf_evsel__object.size); |
69aad6f1 | 225 | |
ef1d1af2 ACM |
226 | if (evsel != NULL) |
227 | perf_evsel__init(evsel, attr, idx); | |
69aad6f1 | 228 | |
03e0a7df | 229 | if (perf_evsel__is_bpf_output(evsel)) { |
d37ba880 WN |
230 | evsel->attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | |
231 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
03e0a7df WN |
232 | evsel->attr.sample_period = 1; |
233 | } | |
234 | ||
69aad6f1 ACM |
235 | return evsel; |
236 | } | |
237 | ||
8dd2a131 JO |
238 | /* |
239 | * Returns pointer with encoded error via <linux/err.h> interface. | |
240 | */ | |
ef503831 | 241 | struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx) |
efd2b924 | 242 | { |
ce8ccff5 | 243 | struct perf_evsel *evsel = zalloc(perf_evsel__object.size); |
8dd2a131 | 244 | int err = -ENOMEM; |
efd2b924 | 245 | |
8dd2a131 JO |
246 | if (evsel == NULL) { |
247 | goto out_err; | |
248 | } else { | |
efd2b924 | 249 | struct perf_event_attr attr = { |
0b80f8b3 ACM |
250 | .type = PERF_TYPE_TRACEPOINT, |
251 | .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | | |
252 | PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), | |
efd2b924 ACM |
253 | }; |
254 | ||
e48ffe2b ACM |
255 | if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) |
256 | goto out_free; | |
257 | ||
97978b3e | 258 | evsel->tp_format = trace_event__tp_format(sys, name); |
8dd2a131 JO |
259 | if (IS_ERR(evsel->tp_format)) { |
260 | err = PTR_ERR(evsel->tp_format); | |
efd2b924 | 261 | goto out_free; |
8dd2a131 | 262 | } |
efd2b924 | 263 | |
0b80f8b3 | 264 | event_attr_init(&attr); |
efd2b924 | 265 | attr.config = evsel->tp_format->id; |
0b80f8b3 | 266 | attr.sample_period = 1; |
efd2b924 | 267 | perf_evsel__init(evsel, &attr, idx); |
efd2b924 ACM |
268 | } |
269 | ||
270 | return evsel; | |
271 | ||
272 | out_free: | |
74cf249d | 273 | zfree(&evsel->name); |
efd2b924 | 274 | free(evsel); |
8dd2a131 JO |
275 | out_err: |
276 | return ERR_PTR(err); | |
efd2b924 ACM |
277 | } |
278 | ||
8ad7013b | 279 | const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = { |
c410431c ACM |
280 | "cycles", |
281 | "instructions", | |
282 | "cache-references", | |
283 | "cache-misses", | |
284 | "branches", | |
285 | "branch-misses", | |
286 | "bus-cycles", | |
287 | "stalled-cycles-frontend", | |
288 | "stalled-cycles-backend", | |
289 | "ref-cycles", | |
290 | }; | |
291 | ||
dd4f5223 | 292 | static const char *__perf_evsel__hw_name(u64 config) |
c410431c ACM |
293 | { |
294 | if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config]) | |
295 | return perf_evsel__hw_names[config]; | |
296 | ||
297 | return "unknown-hardware"; | |
298 | } | |
299 | ||
27f18617 | 300 | static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size) |
c410431c | 301 | { |
27f18617 | 302 | int colon = 0, r = 0; |
c410431c | 303 | struct perf_event_attr *attr = &evsel->attr; |
c410431c ACM |
304 | bool exclude_guest_default = false; |
305 | ||
306 | #define MOD_PRINT(context, mod) do { \ | |
307 | if (!attr->exclude_##context) { \ | |
27f18617 | 308 | if (!colon) colon = ++r; \ |
c410431c ACM |
309 | r += scnprintf(bf + r, size - r, "%c", mod); \ |
310 | } } while(0) | |
311 | ||
312 | if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { | |
313 | MOD_PRINT(kernel, 'k'); | |
314 | MOD_PRINT(user, 'u'); | |
315 | MOD_PRINT(hv, 'h'); | |
316 | exclude_guest_default = true; | |
317 | } | |
318 | ||
319 | if (attr->precise_ip) { | |
320 | if (!colon) | |
27f18617 | 321 | colon = ++r; |
c410431c ACM |
322 | r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); |
323 | exclude_guest_default = true; | |
324 | } | |
325 | ||
326 | if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) { | |
327 | MOD_PRINT(host, 'H'); | |
328 | MOD_PRINT(guest, 'G'); | |
329 | } | |
330 | #undef MOD_PRINT | |
331 | if (colon) | |
27f18617 | 332 | bf[colon - 1] = ':'; |
c410431c ACM |
333 | return r; |
334 | } | |
335 | ||
27f18617 ACM |
336 | static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size) |
337 | { | |
338 | int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config)); | |
339 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
340 | } | |
341 | ||
8ad7013b | 342 | const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = { |
335c2f5d ACM |
343 | "cpu-clock", |
344 | "task-clock", | |
345 | "page-faults", | |
346 | "context-switches", | |
8ad7013b | 347 | "cpu-migrations", |
335c2f5d ACM |
348 | "minor-faults", |
349 | "major-faults", | |
350 | "alignment-faults", | |
351 | "emulation-faults", | |
d22d1a2a | 352 | "dummy", |
335c2f5d ACM |
353 | }; |
354 | ||
dd4f5223 | 355 | static const char *__perf_evsel__sw_name(u64 config) |
335c2f5d ACM |
356 | { |
357 | if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config]) | |
358 | return perf_evsel__sw_names[config]; | |
359 | return "unknown-software"; | |
360 | } | |
361 | ||
362 | static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size) | |
363 | { | |
364 | int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config)); | |
365 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
366 | } | |
367 | ||
287e74aa JO |
368 | static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) |
369 | { | |
370 | int r; | |
371 | ||
372 | r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); | |
373 | ||
374 | if (type & HW_BREAKPOINT_R) | |
375 | r += scnprintf(bf + r, size - r, "r"); | |
376 | ||
377 | if (type & HW_BREAKPOINT_W) | |
378 | r += scnprintf(bf + r, size - r, "w"); | |
379 | ||
380 | if (type & HW_BREAKPOINT_X) | |
381 | r += scnprintf(bf + r, size - r, "x"); | |
382 | ||
383 | return r; | |
384 | } | |
385 | ||
386 | static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size) | |
387 | { | |
388 | struct perf_event_attr *attr = &evsel->attr; | |
389 | int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); | |
390 | return r + perf_evsel__add_modifiers(evsel, bf + r, size - r); | |
391 | } | |
392 | ||
0b668bc9 ACM |
393 | const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX] |
394 | [PERF_EVSEL__MAX_ALIASES] = { | |
395 | { "L1-dcache", "l1-d", "l1d", "L1-data", }, | |
396 | { "L1-icache", "l1-i", "l1i", "L1-instruction", }, | |
397 | { "LLC", "L2", }, | |
398 | { "dTLB", "d-tlb", "Data-TLB", }, | |
399 | { "iTLB", "i-tlb", "Instruction-TLB", }, | |
400 | { "branch", "branches", "bpu", "btb", "bpc", }, | |
401 | { "node", }, | |
402 | }; | |
403 | ||
404 | const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX] | |
405 | [PERF_EVSEL__MAX_ALIASES] = { | |
406 | { "load", "loads", "read", }, | |
407 | { "store", "stores", "write", }, | |
408 | { "prefetch", "prefetches", "speculative-read", "speculative-load", }, | |
409 | }; | |
410 | ||
411 | const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX] | |
412 | [PERF_EVSEL__MAX_ALIASES] = { | |
413 | { "refs", "Reference", "ops", "access", }, | |
414 | { "misses", "miss", }, | |
415 | }; | |
416 | ||
417 | #define C(x) PERF_COUNT_HW_CACHE_##x | |
418 | #define CACHE_READ (1 << C(OP_READ)) | |
419 | #define CACHE_WRITE (1 << C(OP_WRITE)) | |
420 | #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) | |
421 | #define COP(x) (1 << x) | |
422 | ||
423 | /* | |
424 | * cache operartion stat | |
425 | * L1I : Read and prefetch only | |
426 | * ITLB and BPU : Read-only | |
427 | */ | |
428 | static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = { | |
429 | [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
430 | [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), | |
431 | [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
432 | [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
433 | [C(ITLB)] = (CACHE_READ), | |
434 | [C(BPU)] = (CACHE_READ), | |
435 | [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), | |
436 | }; | |
437 | ||
438 | bool perf_evsel__is_cache_op_valid(u8 type, u8 op) | |
439 | { | |
440 | if (perf_evsel__hw_cache_stat[type] & COP(op)) | |
441 | return true; /* valid */ | |
442 | else | |
443 | return false; /* invalid */ | |
444 | } | |
445 | ||
446 | int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, | |
447 | char *bf, size_t size) | |
448 | { | |
449 | if (result) { | |
450 | return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0], | |
451 | perf_evsel__hw_cache_op[op][0], | |
452 | perf_evsel__hw_cache_result[result][0]); | |
453 | } | |
454 | ||
455 | return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0], | |
456 | perf_evsel__hw_cache_op[op][1]); | |
457 | } | |
458 | ||
dd4f5223 | 459 | static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size) |
0b668bc9 ACM |
460 | { |
461 | u8 op, result, type = (config >> 0) & 0xff; | |
462 | const char *err = "unknown-ext-hardware-cache-type"; | |
463 | ||
464 | if (type > PERF_COUNT_HW_CACHE_MAX) | |
465 | goto out_err; | |
466 | ||
467 | op = (config >> 8) & 0xff; | |
468 | err = "unknown-ext-hardware-cache-op"; | |
469 | if (op > PERF_COUNT_HW_CACHE_OP_MAX) | |
470 | goto out_err; | |
471 | ||
472 | result = (config >> 16) & 0xff; | |
473 | err = "unknown-ext-hardware-cache-result"; | |
474 | if (result > PERF_COUNT_HW_CACHE_RESULT_MAX) | |
475 | goto out_err; | |
476 | ||
477 | err = "invalid-cache"; | |
478 | if (!perf_evsel__is_cache_op_valid(type, op)) | |
479 | goto out_err; | |
480 | ||
481 | return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size); | |
482 | out_err: | |
483 | return scnprintf(bf, size, "%s", err); | |
484 | } | |
485 | ||
486 | static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size) | |
487 | { | |
488 | int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size); | |
489 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
490 | } | |
491 | ||
6eef3d9c ACM |
492 | static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size) |
493 | { | |
494 | int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config); | |
495 | return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret); | |
496 | } | |
497 | ||
7289f83c | 498 | const char *perf_evsel__name(struct perf_evsel *evsel) |
a4460836 | 499 | { |
7289f83c | 500 | char bf[128]; |
a4460836 | 501 | |
7289f83c ACM |
502 | if (evsel->name) |
503 | return evsel->name; | |
c410431c ACM |
504 | |
505 | switch (evsel->attr.type) { | |
506 | case PERF_TYPE_RAW: | |
6eef3d9c | 507 | perf_evsel__raw_name(evsel, bf, sizeof(bf)); |
c410431c ACM |
508 | break; |
509 | ||
510 | case PERF_TYPE_HARDWARE: | |
7289f83c | 511 | perf_evsel__hw_name(evsel, bf, sizeof(bf)); |
c410431c | 512 | break; |
0b668bc9 ACM |
513 | |
514 | case PERF_TYPE_HW_CACHE: | |
7289f83c | 515 | perf_evsel__hw_cache_name(evsel, bf, sizeof(bf)); |
0b668bc9 ACM |
516 | break; |
517 | ||
335c2f5d | 518 | case PERF_TYPE_SOFTWARE: |
7289f83c | 519 | perf_evsel__sw_name(evsel, bf, sizeof(bf)); |
335c2f5d ACM |
520 | break; |
521 | ||
a4460836 | 522 | case PERF_TYPE_TRACEPOINT: |
7289f83c | 523 | scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); |
a4460836 ACM |
524 | break; |
525 | ||
287e74aa JO |
526 | case PERF_TYPE_BREAKPOINT: |
527 | perf_evsel__bp_name(evsel, bf, sizeof(bf)); | |
528 | break; | |
529 | ||
c410431c | 530 | default: |
ca1b1457 RR |
531 | scnprintf(bf, sizeof(bf), "unknown attr type: %d", |
532 | evsel->attr.type); | |
a4460836 | 533 | break; |
c410431c ACM |
534 | } |
535 | ||
7289f83c ACM |
536 | evsel->name = strdup(bf); |
537 | ||
538 | return evsel->name ?: "unknown"; | |
c410431c ACM |
539 | } |
540 | ||
717e263f NK |
541 | const char *perf_evsel__group_name(struct perf_evsel *evsel) |
542 | { | |
543 | return evsel->group_name ?: "anon group"; | |
544 | } | |
545 | ||
546 | int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size) | |
547 | { | |
548 | int ret; | |
549 | struct perf_evsel *pos; | |
550 | const char *group_name = perf_evsel__group_name(evsel); | |
551 | ||
552 | ret = scnprintf(buf, size, "%s", group_name); | |
553 | ||
554 | ret += scnprintf(buf + ret, size - ret, " { %s", | |
555 | perf_evsel__name(evsel)); | |
556 | ||
557 | for_each_group_member(pos, evsel) | |
558 | ret += scnprintf(buf + ret, size - ret, ", %s", | |
559 | perf_evsel__name(pos)); | |
560 | ||
561 | ret += scnprintf(buf + ret, size - ret, " }"); | |
562 | ||
563 | return ret; | |
564 | } | |
565 | ||
01e0d50c ACM |
566 | void perf_evsel__config_callchain(struct perf_evsel *evsel, |
567 | struct record_opts *opts, | |
568 | struct callchain_param *param) | |
6bedfab6 JO |
569 | { |
570 | bool function = perf_evsel__is_function_event(evsel); | |
571 | struct perf_event_attr *attr = &evsel->attr; | |
572 | ||
573 | perf_evsel__set_sample_bit(evsel, CALLCHAIN); | |
574 | ||
792d48b4 ACM |
575 | attr->sample_max_stack = param->max_stack; |
576 | ||
c3a6a8c4 | 577 | if (param->record_mode == CALLCHAIN_LBR) { |
aad2b21c KL |
578 | if (!opts->branch_stack) { |
579 | if (attr->exclude_user) { | |
580 | pr_warning("LBR callstack option is only available " | |
581 | "to get user callchain information. " | |
582 | "Falling back to framepointers.\n"); | |
583 | } else { | |
584 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); | |
585 | attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER | | |
bd0f8895 AK |
586 | PERF_SAMPLE_BRANCH_CALL_STACK | |
587 | PERF_SAMPLE_BRANCH_NO_CYCLES | | |
588 | PERF_SAMPLE_BRANCH_NO_FLAGS; | |
aad2b21c KL |
589 | } |
590 | } else | |
591 | pr_warning("Cannot use LBR callstack with branch stack. " | |
592 | "Falling back to framepointers.\n"); | |
593 | } | |
594 | ||
c3a6a8c4 | 595 | if (param->record_mode == CALLCHAIN_DWARF) { |
6bedfab6 JO |
596 | if (!function) { |
597 | perf_evsel__set_sample_bit(evsel, REGS_USER); | |
598 | perf_evsel__set_sample_bit(evsel, STACK_USER); | |
599 | attr->sample_regs_user = PERF_REGS_MASK; | |
c3a6a8c4 | 600 | attr->sample_stack_user = param->dump_size; |
6bedfab6 JO |
601 | attr->exclude_callchain_user = 1; |
602 | } else { | |
603 | pr_info("Cannot use DWARF unwind for function trace event," | |
604 | " falling back to framepointers.\n"); | |
605 | } | |
606 | } | |
607 | ||
608 | if (function) { | |
609 | pr_info("Disabling user space callchains for function trace event.\n"); | |
610 | attr->exclude_callchain_user = 1; | |
611 | } | |
612 | } | |
613 | ||
d457c963 KL |
614 | static void |
615 | perf_evsel__reset_callgraph(struct perf_evsel *evsel, | |
616 | struct callchain_param *param) | |
617 | { | |
618 | struct perf_event_attr *attr = &evsel->attr; | |
619 | ||
620 | perf_evsel__reset_sample_bit(evsel, CALLCHAIN); | |
621 | if (param->record_mode == CALLCHAIN_LBR) { | |
622 | perf_evsel__reset_sample_bit(evsel, BRANCH_STACK); | |
623 | attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER | | |
624 | PERF_SAMPLE_BRANCH_CALL_STACK); | |
625 | } | |
626 | if (param->record_mode == CALLCHAIN_DWARF) { | |
627 | perf_evsel__reset_sample_bit(evsel, REGS_USER); | |
628 | perf_evsel__reset_sample_bit(evsel, STACK_USER); | |
629 | } | |
630 | } | |
631 | ||
632 | static void apply_config_terms(struct perf_evsel *evsel, | |
633 | struct record_opts *opts) | |
930a2e29 JO |
634 | { |
635 | struct perf_evsel_config_term *term; | |
32067712 KL |
636 | struct list_head *config_terms = &evsel->config_terms; |
637 | struct perf_event_attr *attr = &evsel->attr; | |
d457c963 KL |
638 | struct callchain_param param; |
639 | u32 dump_size = 0; | |
792d48b4 ACM |
640 | int max_stack = 0; |
641 | const char *callgraph_buf = NULL; | |
d457c963 KL |
642 | |
643 | /* callgraph default */ | |
644 | param.record_mode = callchain_param.record_mode; | |
930a2e29 JO |
645 | |
646 | list_for_each_entry(term, config_terms, list) { | |
647 | switch (term->type) { | |
ee4c7588 JO |
648 | case PERF_EVSEL__CONFIG_TERM_PERIOD: |
649 | attr->sample_period = term->val.period; | |
ab35a7d0 | 650 | attr->freq = 0; |
32067712 | 651 | break; |
09af2a55 NK |
652 | case PERF_EVSEL__CONFIG_TERM_FREQ: |
653 | attr->sample_freq = term->val.freq; | |
654 | attr->freq = 1; | |
655 | break; | |
32067712 KL |
656 | case PERF_EVSEL__CONFIG_TERM_TIME: |
657 | if (term->val.time) | |
658 | perf_evsel__set_sample_bit(evsel, TIME); | |
659 | else | |
660 | perf_evsel__reset_sample_bit(evsel, TIME); | |
661 | break; | |
d457c963 KL |
662 | case PERF_EVSEL__CONFIG_TERM_CALLGRAPH: |
663 | callgraph_buf = term->val.callgraph; | |
664 | break; | |
665 | case PERF_EVSEL__CONFIG_TERM_STACK_USER: | |
666 | dump_size = term->val.stack_user; | |
667 | break; | |
792d48b4 ACM |
668 | case PERF_EVSEL__CONFIG_TERM_MAX_STACK: |
669 | max_stack = term->val.max_stack; | |
670 | break; | |
374ce938 WN |
671 | case PERF_EVSEL__CONFIG_TERM_INHERIT: |
672 | /* | |
673 | * attr->inherit should has already been set by | |
674 | * perf_evsel__config. If user explicitly set | |
675 | * inherit using config terms, override global | |
676 | * opt->no_inherit setting. | |
677 | */ | |
678 | attr->inherit = term->val.inherit ? 1 : 0; | |
679 | break; | |
930a2e29 JO |
680 | default: |
681 | break; | |
682 | } | |
683 | } | |
d457c963 KL |
684 | |
685 | /* User explicitly set per-event callgraph, clear the old setting and reset. */ | |
792d48b4 ACM |
686 | if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) { |
687 | if (max_stack) { | |
688 | param.max_stack = max_stack; | |
689 | if (callgraph_buf == NULL) | |
690 | callgraph_buf = "fp"; | |
691 | } | |
d457c963 KL |
692 | |
693 | /* parse callgraph parameters */ | |
694 | if (callgraph_buf != NULL) { | |
f9db0d0f KL |
695 | if (!strcmp(callgraph_buf, "no")) { |
696 | param.enabled = false; | |
697 | param.record_mode = CALLCHAIN_NONE; | |
698 | } else { | |
699 | param.enabled = true; | |
700 | if (parse_callchain_record(callgraph_buf, ¶m)) { | |
701 | pr_err("per-event callgraph setting for %s failed. " | |
702 | "Apply callgraph global setting for it\n", | |
703 | evsel->name); | |
704 | return; | |
705 | } | |
d457c963 KL |
706 | } |
707 | } | |
708 | if (dump_size > 0) { | |
709 | dump_size = round_up(dump_size, sizeof(u64)); | |
710 | param.dump_size = dump_size; | |
711 | } | |
712 | ||
713 | /* If global callgraph set, clear it */ | |
714 | if (callchain_param.enabled) | |
715 | perf_evsel__reset_callgraph(evsel, &callchain_param); | |
716 | ||
717 | /* set perf-event callgraph */ | |
718 | if (param.enabled) | |
01e0d50c | 719 | perf_evsel__config_callchain(evsel, opts, ¶m); |
d457c963 | 720 | } |
930a2e29 JO |
721 | } |
722 | ||
774cb499 JO |
723 | /* |
724 | * The enable_on_exec/disabled value strategy: | |
725 | * | |
726 | * 1) For any type of traced program: | |
727 | * - all independent events and group leaders are disabled | |
728 | * - all group members are enabled | |
729 | * | |
730 | * Group members are ruled by group leaders. They need to | |
731 | * be enabled, because the group scheduling relies on that. | |
732 | * | |
733 | * 2) For traced programs executed by perf: | |
734 | * - all independent events and group leaders have | |
735 | * enable_on_exec set | |
736 | * - we don't specifically enable or disable any event during | |
737 | * the record command | |
738 | * | |
739 | * Independent events and group leaders are initially disabled | |
740 | * and get enabled by exec. Group members are ruled by group | |
741 | * leaders as stated in 1). | |
742 | * | |
743 | * 3) For traced programs attached by perf (pid/tid): | |
744 | * - we specifically enable or disable all events during | |
745 | * the record command | |
746 | * | |
747 | * When attaching events to already running traced we | |
748 | * enable/disable events specifically, as there's no | |
749 | * initial traced exec call. | |
750 | */ | |
e68ae9cf ACM |
751 | void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts, |
752 | struct callchain_param *callchain) | |
0f82ebc4 | 753 | { |
3c176311 | 754 | struct perf_evsel *leader = evsel->leader; |
0f82ebc4 | 755 | struct perf_event_attr *attr = &evsel->attr; |
60b0896c | 756 | int track = evsel->tracking; |
3aa5939d | 757 | bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread; |
0f82ebc4 | 758 | |
594ac61a | 759 | attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; |
0f82ebc4 | 760 | attr->inherit = !opts->no_inherit; |
0f82ebc4 | 761 | |
7be5ebe8 ACM |
762 | perf_evsel__set_sample_bit(evsel, IP); |
763 | perf_evsel__set_sample_bit(evsel, TID); | |
0f82ebc4 | 764 | |
3c176311 JO |
765 | if (evsel->sample_read) { |
766 | perf_evsel__set_sample_bit(evsel, READ); | |
767 | ||
768 | /* | |
769 | * We need ID even in case of single event, because | |
770 | * PERF_SAMPLE_READ process ID specific data. | |
771 | */ | |
75562573 | 772 | perf_evsel__set_sample_id(evsel, false); |
3c176311 JO |
773 | |
774 | /* | |
775 | * Apply group format only if we belong to group | |
776 | * with more than one members. | |
777 | */ | |
778 | if (leader->nr_members > 1) { | |
779 | attr->read_format |= PERF_FORMAT_GROUP; | |
780 | attr->inherit = 0; | |
781 | } | |
782 | } | |
783 | ||
0f82ebc4 | 784 | /* |
17314e23 | 785 | * We default some events to have a default interval. But keep |
0f82ebc4 ACM |
786 | * it a weak assumption overridable by the user. |
787 | */ | |
17314e23 | 788 | if (!attr->sample_period || (opts->user_freq != UINT_MAX || |
0f82ebc4 ACM |
789 | opts->user_interval != ULLONG_MAX)) { |
790 | if (opts->freq) { | |
7be5ebe8 | 791 | perf_evsel__set_sample_bit(evsel, PERIOD); |
0f82ebc4 ACM |
792 | attr->freq = 1; |
793 | attr->sample_freq = opts->freq; | |
794 | } else { | |
795 | attr->sample_period = opts->default_interval; | |
796 | } | |
797 | } | |
798 | ||
3c176311 JO |
799 | /* |
800 | * Disable sampling for all group members other | |
801 | * than leader in case leader 'leads' the sampling. | |
802 | */ | |
803 | if ((leader != evsel) && leader->sample_read) { | |
804 | attr->sample_freq = 0; | |
805 | attr->sample_period = 0; | |
806 | } | |
807 | ||
0f82ebc4 ACM |
808 | if (opts->no_samples) |
809 | attr->sample_freq = 0; | |
810 | ||
811 | if (opts->inherit_stat) | |
812 | attr->inherit_stat = 1; | |
813 | ||
814 | if (opts->sample_address) { | |
7be5ebe8 | 815 | perf_evsel__set_sample_bit(evsel, ADDR); |
0f82ebc4 ACM |
816 | attr->mmap_data = track; |
817 | } | |
818 | ||
f140373b JO |
819 | /* |
820 | * We don't allow user space callchains for function trace | |
821 | * event, due to issues with page faults while tracing page | |
822 | * fault handler and its overall trickiness nature. | |
823 | */ | |
824 | if (perf_evsel__is_function_event(evsel)) | |
825 | evsel->attr.exclude_callchain_user = 1; | |
826 | ||
e68ae9cf | 827 | if (callchain && callchain->enabled && !evsel->no_aux_samples) |
01e0d50c | 828 | perf_evsel__config_callchain(evsel, opts, callchain); |
26d33022 | 829 | |
6a21c0b5 | 830 | if (opts->sample_intr_regs) { |
bcc84ec6 | 831 | attr->sample_regs_intr = opts->sample_intr_regs; |
6a21c0b5 SE |
832 | perf_evsel__set_sample_bit(evsel, REGS_INTR); |
833 | } | |
834 | ||
3aa5939d | 835 | if (target__has_cpu(&opts->target)) |
7be5ebe8 | 836 | perf_evsel__set_sample_bit(evsel, CPU); |
0f82ebc4 | 837 | |
3e76ac78 | 838 | if (opts->period) |
7be5ebe8 | 839 | perf_evsel__set_sample_bit(evsel, PERIOD); |
3e76ac78 | 840 | |
8affc2b8 | 841 | /* |
bd1a0be5 | 842 | * When the user explicitly disabled time don't force it here. |
8affc2b8 AK |
843 | */ |
844 | if (opts->sample_time && | |
845 | (!perf_missing_features.sample_id_all && | |
3abebc55 AH |
846 | (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu || |
847 | opts->sample_time_set))) | |
7be5ebe8 | 848 | perf_evsel__set_sample_bit(evsel, TIME); |
0f82ebc4 | 849 | |
6ff1ce76 | 850 | if (opts->raw_samples && !evsel->no_aux_samples) { |
7be5ebe8 ACM |
851 | perf_evsel__set_sample_bit(evsel, TIME); |
852 | perf_evsel__set_sample_bit(evsel, RAW); | |
853 | perf_evsel__set_sample_bit(evsel, CPU); | |
0f82ebc4 ACM |
854 | } |
855 | ||
ccf49bfc | 856 | if (opts->sample_address) |
1e7ed5ec | 857 | perf_evsel__set_sample_bit(evsel, DATA_SRC); |
ccf49bfc | 858 | |
509051ea | 859 | if (opts->no_buffering) { |
0f82ebc4 ACM |
860 | attr->watermark = 0; |
861 | attr->wakeup_events = 1; | |
862 | } | |
6ff1ce76 | 863 | if (opts->branch_stack && !evsel->no_aux_samples) { |
7be5ebe8 | 864 | perf_evsel__set_sample_bit(evsel, BRANCH_STACK); |
bdfebd84 RAV |
865 | attr->branch_sample_type = opts->branch_stack; |
866 | } | |
0f82ebc4 | 867 | |
05484298 | 868 | if (opts->sample_weight) |
1e7ed5ec | 869 | perf_evsel__set_sample_bit(evsel, WEIGHT); |
05484298 | 870 | |
62e503b7 | 871 | attr->task = track; |
5c5e854b | 872 | attr->mmap = track; |
a5a5ba72 | 873 | attr->mmap2 = track && !perf_missing_features.mmap2; |
5c5e854b | 874 | attr->comm = track; |
0f82ebc4 | 875 | |
b757bb09 AH |
876 | if (opts->record_switch_events) |
877 | attr->context_switch = track; | |
878 | ||
475eeab9 | 879 | if (opts->sample_transaction) |
1e7ed5ec | 880 | perf_evsel__set_sample_bit(evsel, TRANSACTION); |
475eeab9 | 881 | |
85c273d2 AK |
882 | if (opts->running_time) { |
883 | evsel->attr.read_format |= | |
884 | PERF_FORMAT_TOTAL_TIME_ENABLED | | |
885 | PERF_FORMAT_TOTAL_TIME_RUNNING; | |
886 | } | |
887 | ||
774cb499 JO |
888 | /* |
889 | * XXX see the function comment above | |
890 | * | |
891 | * Disabling only independent events or group leaders, | |
892 | * keeping group members enabled. | |
893 | */ | |
823254ed | 894 | if (perf_evsel__is_group_leader(evsel)) |
774cb499 JO |
895 | attr->disabled = 1; |
896 | ||
897 | /* | |
898 | * Setting enable_on_exec for independent events and | |
899 | * group leaders for traced executed by perf. | |
900 | */ | |
6619a53e AK |
901 | if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) && |
902 | !opts->initial_delay) | |
0f82ebc4 | 903 | attr->enable_on_exec = 1; |
2afd2bcf AH |
904 | |
905 | if (evsel->immediate) { | |
906 | attr->disabled = 0; | |
907 | attr->enable_on_exec = 0; | |
908 | } | |
814c8c38 PZ |
909 | |
910 | clockid = opts->clockid; | |
911 | if (opts->use_clockid) { | |
912 | attr->use_clockid = 1; | |
913 | attr->clockid = opts->clockid; | |
914 | } | |
930a2e29 | 915 | |
7f94af7a JO |
916 | if (evsel->precise_max) |
917 | perf_event_attr__set_max_precise_ip(attr); | |
918 | ||
85723885 JO |
919 | if (opts->all_user) { |
920 | attr->exclude_kernel = 1; | |
921 | attr->exclude_user = 0; | |
922 | } | |
923 | ||
924 | if (opts->all_kernel) { | |
925 | attr->exclude_kernel = 0; | |
926 | attr->exclude_user = 1; | |
927 | } | |
928 | ||
930a2e29 JO |
929 | /* |
930 | * Apply event specific term settings, | |
931 | * it overloads any global configuration. | |
932 | */ | |
d457c963 | 933 | apply_config_terms(evsel, opts); |
0f82ebc4 ACM |
934 | } |
935 | ||
8885846f | 936 | static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
69aad6f1 | 937 | { |
4af4c955 | 938 | int cpu, thread; |
bf8e8f4b AH |
939 | |
940 | if (evsel->system_wide) | |
941 | nthreads = 1; | |
942 | ||
69aad6f1 | 943 | evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int)); |
4af4c955 DA |
944 | |
945 | if (evsel->fd) { | |
946 | for (cpu = 0; cpu < ncpus; cpu++) { | |
947 | for (thread = 0; thread < nthreads; thread++) { | |
948 | FD(evsel, cpu, thread) = -1; | |
949 | } | |
950 | } | |
951 | } | |
952 | ||
69aad6f1 ACM |
953 | return evsel->fd != NULL ? 0 : -ENOMEM; |
954 | } | |
955 | ||
e2407bef AK |
956 | static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads, |
957 | int ioc, void *arg) | |
745cefc5 ACM |
958 | { |
959 | int cpu, thread; | |
960 | ||
bf8e8f4b AH |
961 | if (evsel->system_wide) |
962 | nthreads = 1; | |
963 | ||
745cefc5 ACM |
964 | for (cpu = 0; cpu < ncpus; cpu++) { |
965 | for (thread = 0; thread < nthreads; thread++) { | |
966 | int fd = FD(evsel, cpu, thread), | |
e2407bef | 967 | err = ioctl(fd, ioc, arg); |
745cefc5 ACM |
968 | |
969 | if (err) | |
970 | return err; | |
971 | } | |
972 | } | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
f47805a2 ACM |
977 | int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads, |
978 | const char *filter) | |
e2407bef AK |
979 | { |
980 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
981 | PERF_EVENT_IOC_SET_FILTER, | |
982 | (void *)filter); | |
983 | } | |
984 | ||
12467ae4 ACM |
985 | int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter) |
986 | { | |
987 | char *new_filter = strdup(filter); | |
988 | ||
989 | if (new_filter != NULL) { | |
990 | free(evsel->filter); | |
991 | evsel->filter = new_filter; | |
992 | return 0; | |
993 | } | |
994 | ||
995 | return -1; | |
996 | } | |
997 | ||
64ec84f5 ACM |
998 | int perf_evsel__append_filter(struct perf_evsel *evsel, |
999 | const char *op, const char *filter) | |
1000 | { | |
1001 | char *new_filter; | |
1002 | ||
1003 | if (evsel->filter == NULL) | |
1004 | return perf_evsel__set_filter(evsel, filter); | |
1005 | ||
1006 | if (asprintf(&new_filter,"(%s) %s (%s)", evsel->filter, op, filter) > 0) { | |
1007 | free(evsel->filter); | |
1008 | evsel->filter = new_filter; | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | return -1; | |
1013 | } | |
1014 | ||
5cd95fc3 | 1015 | int perf_evsel__enable(struct perf_evsel *evsel) |
e2407bef | 1016 | { |
5cd95fc3 JO |
1017 | int nthreads = thread_map__nr(evsel->threads); |
1018 | int ncpus = cpu_map__nr(evsel->cpus); | |
1019 | ||
e2407bef AK |
1020 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, |
1021 | PERF_EVENT_IOC_ENABLE, | |
1022 | 0); | |
1023 | } | |
1024 | ||
e98a4cbb JO |
1025 | int perf_evsel__disable(struct perf_evsel *evsel) |
1026 | { | |
1027 | int nthreads = thread_map__nr(evsel->threads); | |
1028 | int ncpus = cpu_map__nr(evsel->cpus); | |
1029 | ||
1030 | return perf_evsel__run_ioctl(evsel, ncpus, nthreads, | |
1031 | PERF_EVENT_IOC_DISABLE, | |
1032 | 0); | |
1033 | } | |
1034 | ||
70db7533 ACM |
1035 | int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) |
1036 | { | |
8d9cbd8f VG |
1037 | if (ncpus == 0 || nthreads == 0) |
1038 | return 0; | |
1039 | ||
bf8e8f4b AH |
1040 | if (evsel->system_wide) |
1041 | nthreads = 1; | |
1042 | ||
a91e5431 ACM |
1043 | evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id)); |
1044 | if (evsel->sample_id == NULL) | |
1045 | return -ENOMEM; | |
1046 | ||
1047 | evsel->id = zalloc(ncpus * nthreads * sizeof(u64)); | |
1048 | if (evsel->id == NULL) { | |
1049 | xyarray__delete(evsel->sample_id); | |
1050 | evsel->sample_id = NULL; | |
1051 | return -ENOMEM; | |
1052 | } | |
1053 | ||
1054 | return 0; | |
70db7533 ACM |
1055 | } |
1056 | ||
8885846f | 1057 | static void perf_evsel__free_fd(struct perf_evsel *evsel) |
69aad6f1 ACM |
1058 | { |
1059 | xyarray__delete(evsel->fd); | |
1060 | evsel->fd = NULL; | |
1061 | } | |
1062 | ||
8885846f | 1063 | static void perf_evsel__free_id(struct perf_evsel *evsel) |
70db7533 | 1064 | { |
a91e5431 ACM |
1065 | xyarray__delete(evsel->sample_id); |
1066 | evsel->sample_id = NULL; | |
04662523 | 1067 | zfree(&evsel->id); |
70db7533 ACM |
1068 | } |
1069 | ||
930a2e29 JO |
1070 | static void perf_evsel__free_config_terms(struct perf_evsel *evsel) |
1071 | { | |
1072 | struct perf_evsel_config_term *term, *h; | |
1073 | ||
1074 | list_for_each_entry_safe(term, h, &evsel->config_terms, list) { | |
1075 | list_del(&term->list); | |
1076 | free(term); | |
1077 | } | |
1078 | } | |
1079 | ||
c52b12ed ACM |
1080 | void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads) |
1081 | { | |
1082 | int cpu, thread; | |
1083 | ||
bf8e8f4b AH |
1084 | if (evsel->system_wide) |
1085 | nthreads = 1; | |
1086 | ||
c52b12ed ACM |
1087 | for (cpu = 0; cpu < ncpus; cpu++) |
1088 | for (thread = 0; thread < nthreads; ++thread) { | |
1089 | close(FD(evsel, cpu, thread)); | |
1090 | FD(evsel, cpu, thread) = -1; | |
1091 | } | |
1092 | } | |
1093 | ||
ef1d1af2 | 1094 | void perf_evsel__exit(struct perf_evsel *evsel) |
69aad6f1 ACM |
1095 | { |
1096 | assert(list_empty(&evsel->node)); | |
d49e4695 | 1097 | assert(evsel->evlist == NULL); |
736b05a0 NK |
1098 | perf_evsel__free_fd(evsel); |
1099 | perf_evsel__free_id(evsel); | |
930a2e29 | 1100 | perf_evsel__free_config_terms(evsel); |
597e48c1 | 1101 | close_cgroup(evsel->cgrp); |
f30a79b0 | 1102 | cpu_map__put(evsel->cpus); |
fce4d296 | 1103 | cpu_map__put(evsel->own_cpus); |
578e91ec | 1104 | thread_map__put(evsel->threads); |
597e48c1 | 1105 | zfree(&evsel->group_name); |
597e48c1 | 1106 | zfree(&evsel->name); |
ce8ccff5 | 1107 | perf_evsel__object.fini(evsel); |
ef1d1af2 ACM |
1108 | } |
1109 | ||
1110 | void perf_evsel__delete(struct perf_evsel *evsel) | |
1111 | { | |
1112 | perf_evsel__exit(evsel); | |
69aad6f1 ACM |
1113 | free(evsel); |
1114 | } | |
c52b12ed | 1115 | |
a6fa0038 | 1116 | void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread, |
857a94a2 | 1117 | struct perf_counts_values *count) |
c7a79c47 SE |
1118 | { |
1119 | struct perf_counts_values tmp; | |
1120 | ||
1121 | if (!evsel->prev_raw_counts) | |
1122 | return; | |
1123 | ||
1124 | if (cpu == -1) { | |
1125 | tmp = evsel->prev_raw_counts->aggr; | |
1126 | evsel->prev_raw_counts->aggr = *count; | |
1127 | } else { | |
a6fa0038 JO |
1128 | tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread); |
1129 | *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count; | |
c7a79c47 SE |
1130 | } |
1131 | ||
1132 | count->val = count->val - tmp.val; | |
1133 | count->ena = count->ena - tmp.ena; | |
1134 | count->run = count->run - tmp.run; | |
1135 | } | |
1136 | ||
13112bbf JO |
1137 | void perf_counts_values__scale(struct perf_counts_values *count, |
1138 | bool scale, s8 *pscaled) | |
1139 | { | |
1140 | s8 scaled = 0; | |
1141 | ||
1142 | if (scale) { | |
1143 | if (count->run == 0) { | |
1144 | scaled = -1; | |
1145 | count->val = 0; | |
1146 | } else if (count->run < count->ena) { | |
1147 | scaled = 1; | |
1148 | count->val = (u64)((double) count->val * count->ena / count->run + 0.5); | |
1149 | } | |
1150 | } else | |
1151 | count->ena = count->run = 0; | |
1152 | ||
1153 | if (pscaled) | |
1154 | *pscaled = scaled; | |
1155 | } | |
1156 | ||
f99f4719 JO |
1157 | int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, |
1158 | struct perf_counts_values *count) | |
1159 | { | |
1160 | memset(count, 0, sizeof(*count)); | |
1161 | ||
1162 | if (FD(evsel, cpu, thread) < 0) | |
1163 | return -EINVAL; | |
1164 | ||
1165 | if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0) | |
1166 | return -errno; | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | ||
c52b12ed ACM |
1171 | int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, |
1172 | int cpu, int thread, bool scale) | |
1173 | { | |
1174 | struct perf_counts_values count; | |
1175 | size_t nv = scale ? 3 : 1; | |
1176 | ||
1177 | if (FD(evsel, cpu, thread) < 0) | |
1178 | return -EINVAL; | |
1179 | ||
a6fa0038 | 1180 | if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0) |
4eed11d5 ACM |
1181 | return -ENOMEM; |
1182 | ||
c52b12ed ACM |
1183 | if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) |
1184 | return -errno; | |
1185 | ||
a6fa0038 | 1186 | perf_evsel__compute_deltas(evsel, cpu, thread, &count); |
13112bbf | 1187 | perf_counts_values__scale(&count, scale, NULL); |
a6fa0038 | 1188 | *perf_counts(evsel->counts, cpu, thread) = count; |
c52b12ed ACM |
1189 | return 0; |
1190 | } | |
1191 | ||
6a4bb04c JO |
1192 | static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread) |
1193 | { | |
1194 | struct perf_evsel *leader = evsel->leader; | |
1195 | int fd; | |
1196 | ||
823254ed | 1197 | if (perf_evsel__is_group_leader(evsel)) |
6a4bb04c JO |
1198 | return -1; |
1199 | ||
1200 | /* | |
1201 | * Leader must be already processed/open, | |
1202 | * if not it's a bug. | |
1203 | */ | |
1204 | BUG_ON(!leader->fd); | |
1205 | ||
1206 | fd = FD(leader, cpu, thread); | |
1207 | BUG_ON(fd == -1); | |
1208 | ||
1209 | return fd; | |
1210 | } | |
1211 | ||
2c5e8c52 PZ |
1212 | struct bit_names { |
1213 | int bit; | |
1214 | const char *name; | |
1215 | }; | |
1216 | ||
1217 | static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits) | |
1218 | { | |
1219 | bool first_bit = true; | |
1220 | int i = 0; | |
1221 | ||
1222 | do { | |
1223 | if (value & bits[i].bit) { | |
1224 | buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name); | |
1225 | first_bit = false; | |
1226 | } | |
1227 | } while (bits[++i].name != NULL); | |
1228 | } | |
1229 | ||
1230 | static void __p_sample_type(char *buf, size_t size, u64 value) | |
1231 | { | |
1232 | #define bit_name(n) { PERF_SAMPLE_##n, #n } | |
1233 | struct bit_names bits[] = { | |
1234 | bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR), | |
1235 | bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU), | |
1236 | bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW), | |
1237 | bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER), | |
84422592 | 1238 | bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC), |
dcdd184b | 1239 | bit_name(WEIGHT), |
2c5e8c52 PZ |
1240 | { .name = NULL, } |
1241 | }; | |
1242 | #undef bit_name | |
1243 | __p_bits(buf, size, value, bits); | |
1244 | } | |
1245 | ||
a213b92e ACM |
1246 | static void __p_branch_sample_type(char *buf, size_t size, u64 value) |
1247 | { | |
1248 | #define bit_name(n) { PERF_SAMPLE_BRANCH_##n, #n } | |
1249 | struct bit_names bits[] = { | |
1250 | bit_name(USER), bit_name(KERNEL), bit_name(HV), bit_name(ANY), | |
1251 | bit_name(ANY_CALL), bit_name(ANY_RETURN), bit_name(IND_CALL), | |
1252 | bit_name(ABORT_TX), bit_name(IN_TX), bit_name(NO_TX), | |
1253 | bit_name(COND), bit_name(CALL_STACK), bit_name(IND_JUMP), | |
1254 | bit_name(CALL), bit_name(NO_FLAGS), bit_name(NO_CYCLES), | |
1255 | { .name = NULL, } | |
1256 | }; | |
1257 | #undef bit_name | |
1258 | __p_bits(buf, size, value, bits); | |
1259 | } | |
1260 | ||
2c5e8c52 PZ |
1261 | static void __p_read_format(char *buf, size_t size, u64 value) |
1262 | { | |
1263 | #define bit_name(n) { PERF_FORMAT_##n, #n } | |
1264 | struct bit_names bits[] = { | |
1265 | bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING), | |
1266 | bit_name(ID), bit_name(GROUP), | |
1267 | { .name = NULL, } | |
1268 | }; | |
1269 | #undef bit_name | |
1270 | __p_bits(buf, size, value, bits); | |
1271 | } | |
1272 | ||
1273 | #define BUF_SIZE 1024 | |
1274 | ||
7310aed7 | 1275 | #define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val)) |
2c5e8c52 PZ |
1276 | #define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val)) |
1277 | #define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val)) | |
1278 | #define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val) | |
a213b92e | 1279 | #define p_branch_sample_type(val) __p_branch_sample_type(buf, BUF_SIZE, val) |
2c5e8c52 PZ |
1280 | #define p_read_format(val) __p_read_format(buf, BUF_SIZE, val) |
1281 | ||
1282 | #define PRINT_ATTRn(_n, _f, _p) \ | |
1283 | do { \ | |
1284 | if (attr->_f) { \ | |
1285 | _p(attr->_f); \ | |
1286 | ret += attr__fprintf(fp, _n, buf, priv);\ | |
1287 | } \ | |
1288 | } while (0) | |
1289 | ||
1290 | #define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p) | |
1291 | ||
1292 | int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr, | |
1293 | attr__fprintf_f attr__fprintf, void *priv) | |
1294 | { | |
1295 | char buf[BUF_SIZE]; | |
1296 | int ret = 0; | |
1297 | ||
1298 | PRINT_ATTRf(type, p_unsigned); | |
1299 | PRINT_ATTRf(size, p_unsigned); | |
1300 | PRINT_ATTRf(config, p_hex); | |
1301 | PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned); | |
1302 | PRINT_ATTRf(sample_type, p_sample_type); | |
1303 | PRINT_ATTRf(read_format, p_read_format); | |
1304 | ||
1305 | PRINT_ATTRf(disabled, p_unsigned); | |
1306 | PRINT_ATTRf(inherit, p_unsigned); | |
1307 | PRINT_ATTRf(pinned, p_unsigned); | |
1308 | PRINT_ATTRf(exclusive, p_unsigned); | |
1309 | PRINT_ATTRf(exclude_user, p_unsigned); | |
1310 | PRINT_ATTRf(exclude_kernel, p_unsigned); | |
1311 | PRINT_ATTRf(exclude_hv, p_unsigned); | |
1312 | PRINT_ATTRf(exclude_idle, p_unsigned); | |
1313 | PRINT_ATTRf(mmap, p_unsigned); | |
1314 | PRINT_ATTRf(comm, p_unsigned); | |
1315 | PRINT_ATTRf(freq, p_unsigned); | |
1316 | PRINT_ATTRf(inherit_stat, p_unsigned); | |
1317 | PRINT_ATTRf(enable_on_exec, p_unsigned); | |
1318 | PRINT_ATTRf(task, p_unsigned); | |
1319 | PRINT_ATTRf(watermark, p_unsigned); | |
1320 | PRINT_ATTRf(precise_ip, p_unsigned); | |
1321 | PRINT_ATTRf(mmap_data, p_unsigned); | |
1322 | PRINT_ATTRf(sample_id_all, p_unsigned); | |
1323 | PRINT_ATTRf(exclude_host, p_unsigned); | |
1324 | PRINT_ATTRf(exclude_guest, p_unsigned); | |
1325 | PRINT_ATTRf(exclude_callchain_kernel, p_unsigned); | |
1326 | PRINT_ATTRf(exclude_callchain_user, p_unsigned); | |
1327 | PRINT_ATTRf(mmap2, p_unsigned); | |
1328 | PRINT_ATTRf(comm_exec, p_unsigned); | |
1329 | PRINT_ATTRf(use_clockid, p_unsigned); | |
0286039f | 1330 | PRINT_ATTRf(context_switch, p_unsigned); |
0a241ef4 | 1331 | PRINT_ATTRf(write_backward, p_unsigned); |
2c5e8c52 PZ |
1332 | |
1333 | PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned); | |
1334 | PRINT_ATTRf(bp_type, p_unsigned); | |
1335 | PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex); | |
1336 | PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex); | |
a213b92e | 1337 | PRINT_ATTRf(branch_sample_type, p_branch_sample_type); |
2c5e8c52 PZ |
1338 | PRINT_ATTRf(sample_regs_user, p_hex); |
1339 | PRINT_ATTRf(sample_stack_user, p_unsigned); | |
1340 | PRINT_ATTRf(clockid, p_signed); | |
1341 | PRINT_ATTRf(sample_regs_intr, p_hex); | |
70d73de4 | 1342 | PRINT_ATTRf(aux_watermark, p_unsigned); |
792d48b4 | 1343 | PRINT_ATTRf(sample_max_stack, p_unsigned); |
e3e1a54f AH |
1344 | |
1345 | return ret; | |
1346 | } | |
1347 | ||
2c5e8c52 PZ |
1348 | static int __open_attr__fprintf(FILE *fp, const char *name, const char *val, |
1349 | void *priv __attribute__((unused))) | |
1350 | { | |
1351 | return fprintf(fp, " %-32s %s\n", name, val); | |
1352 | } | |
1353 | ||
0252208e | 1354 | static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 1355 | struct thread_map *threads) |
48290609 | 1356 | { |
bf8e8f4b | 1357 | int cpu, thread, nthreads; |
57480d2c | 1358 | unsigned long flags = PERF_FLAG_FD_CLOEXEC; |
727ab04e | 1359 | int pid = -1, err; |
bec19672 | 1360 | enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE; |
48290609 | 1361 | |
bf8e8f4b AH |
1362 | if (evsel->system_wide) |
1363 | nthreads = 1; | |
1364 | else | |
1365 | nthreads = threads->nr; | |
1366 | ||
0252208e | 1367 | if (evsel->fd == NULL && |
bf8e8f4b | 1368 | perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0) |
727ab04e | 1369 | return -ENOMEM; |
4eed11d5 | 1370 | |
023695d9 | 1371 | if (evsel->cgrp) { |
57480d2c | 1372 | flags |= PERF_FLAG_PID_CGROUP; |
023695d9 SE |
1373 | pid = evsel->cgrp->fd; |
1374 | } | |
1375 | ||
594ac61a | 1376 | fallback_missing_features: |
814c8c38 PZ |
1377 | if (perf_missing_features.clockid_wrong) |
1378 | evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */ | |
1379 | if (perf_missing_features.clockid) { | |
1380 | evsel->attr.use_clockid = 0; | |
1381 | evsel->attr.clockid = 0; | |
1382 | } | |
57480d2c YD |
1383 | if (perf_missing_features.cloexec) |
1384 | flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; | |
5c5e854b SE |
1385 | if (perf_missing_features.mmap2) |
1386 | evsel->attr.mmap2 = 0; | |
594ac61a ACM |
1387 | if (perf_missing_features.exclude_guest) |
1388 | evsel->attr.exclude_guest = evsel->attr.exclude_host = 0; | |
bd0f8895 AK |
1389 | if (perf_missing_features.lbr_flags) |
1390 | evsel->attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS | | |
1391 | PERF_SAMPLE_BRANCH_NO_CYCLES); | |
7da36e94 ACM |
1392 | if (perf_missing_features.write_backward) { |
1393 | if (evsel->overwrite) | |
1394 | return -EINVAL; | |
b90dc17a | 1395 | evsel->attr.write_backward = false; |
7da36e94 | 1396 | } |
594ac61a ACM |
1397 | retry_sample_id: |
1398 | if (perf_missing_features.sample_id_all) | |
1399 | evsel->attr.sample_id_all = 0; | |
1400 | ||
2c5e8c52 PZ |
1401 | if (verbose >= 2) { |
1402 | fprintf(stderr, "%.60s\n", graph_dotted_line); | |
1403 | fprintf(stderr, "perf_event_attr:\n"); | |
1404 | perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL); | |
1405 | fprintf(stderr, "%.60s\n", graph_dotted_line); | |
1406 | } | |
e3e1a54f | 1407 | |
86bd5e86 | 1408 | for (cpu = 0; cpu < cpus->nr; cpu++) { |
9d04f178 | 1409 | |
bf8e8f4b | 1410 | for (thread = 0; thread < nthreads; thread++) { |
6a4bb04c | 1411 | int group_fd; |
023695d9 | 1412 | |
bf8e8f4b | 1413 | if (!evsel->cgrp && !evsel->system_wide) |
e13798c7 | 1414 | pid = thread_map__pid(threads, thread); |
023695d9 | 1415 | |
6a4bb04c | 1416 | group_fd = get_group_fd(evsel, cpu, thread); |
bec19672 | 1417 | retry_open: |
a33f6efc | 1418 | pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n", |
e3e1a54f AH |
1419 | pid, cpus->map[cpu], group_fd, flags); |
1420 | ||
0252208e | 1421 | FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr, |
023695d9 | 1422 | pid, |
f08199d3 | 1423 | cpus->map[cpu], |
023695d9 | 1424 | group_fd, flags); |
727ab04e ACM |
1425 | if (FD(evsel, cpu, thread) < 0) { |
1426 | err = -errno; | |
a33f6efc | 1427 | pr_debug2("sys_perf_event_open failed, error %d\n", |
f852fd62 | 1428 | err); |
594ac61a | 1429 | goto try_fallback; |
727ab04e | 1430 | } |
1f45b1d4 WN |
1431 | |
1432 | if (evsel->bpf_fd >= 0) { | |
1433 | int evt_fd = FD(evsel, cpu, thread); | |
1434 | int bpf_fd = evsel->bpf_fd; | |
1435 | ||
1436 | err = ioctl(evt_fd, | |
1437 | PERF_EVENT_IOC_SET_BPF, | |
1438 | bpf_fd); | |
1439 | if (err && errno != EEXIST) { | |
1440 | pr_err("failed to attach bpf fd %d: %s\n", | |
1441 | bpf_fd, strerror(errno)); | |
1442 | err = -EINVAL; | |
1443 | goto out_close; | |
1444 | } | |
1445 | } | |
1446 | ||
bec19672 | 1447 | set_rlimit = NO_CHANGE; |
814c8c38 PZ |
1448 | |
1449 | /* | |
1450 | * If we succeeded but had to kill clockid, fail and | |
1451 | * have perf_evsel__open_strerror() print us a nice | |
1452 | * error. | |
1453 | */ | |
1454 | if (perf_missing_features.clockid || | |
1455 | perf_missing_features.clockid_wrong) { | |
1456 | err = -EINVAL; | |
1457 | goto out_close; | |
1458 | } | |
0252208e | 1459 | } |
48290609 ACM |
1460 | } |
1461 | ||
1462 | return 0; | |
1463 | ||
594ac61a | 1464 | try_fallback: |
bec19672 AK |
1465 | /* |
1466 | * perf stat needs between 5 and 22 fds per CPU. When we run out | |
1467 | * of them try to increase the limits. | |
1468 | */ | |
1469 | if (err == -EMFILE && set_rlimit < INCREASED_MAX) { | |
1470 | struct rlimit l; | |
1471 | int old_errno = errno; | |
1472 | ||
1473 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1474 | if (set_rlimit == NO_CHANGE) | |
1475 | l.rlim_cur = l.rlim_max; | |
1476 | else { | |
1477 | l.rlim_cur = l.rlim_max + 1000; | |
1478 | l.rlim_max = l.rlim_cur; | |
1479 | } | |
1480 | if (setrlimit(RLIMIT_NOFILE, &l) == 0) { | |
1481 | set_rlimit++; | |
1482 | errno = old_errno; | |
1483 | goto retry_open; | |
1484 | } | |
1485 | } | |
1486 | errno = old_errno; | |
1487 | } | |
1488 | ||
594ac61a ACM |
1489 | if (err != -EINVAL || cpu > 0 || thread > 0) |
1490 | goto out_close; | |
1491 | ||
814c8c38 PZ |
1492 | /* |
1493 | * Must probe features in the order they were added to the | |
1494 | * perf_event_attr interface. | |
1495 | */ | |
7da36e94 ACM |
1496 | if (!perf_missing_features.write_backward && evsel->attr.write_backward) { |
1497 | perf_missing_features.write_backward = true; | |
1498 | goto fallback_missing_features; | |
1499 | } else if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) { | |
814c8c38 PZ |
1500 | perf_missing_features.clockid_wrong = true; |
1501 | goto fallback_missing_features; | |
1502 | } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) { | |
1503 | perf_missing_features.clockid = true; | |
1504 | goto fallback_missing_features; | |
1505 | } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) { | |
57480d2c YD |
1506 | perf_missing_features.cloexec = true; |
1507 | goto fallback_missing_features; | |
1508 | } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) { | |
5c5e854b SE |
1509 | perf_missing_features.mmap2 = true; |
1510 | goto fallback_missing_features; | |
1511 | } else if (!perf_missing_features.exclude_guest && | |
1512 | (evsel->attr.exclude_guest || evsel->attr.exclude_host)) { | |
594ac61a ACM |
1513 | perf_missing_features.exclude_guest = true; |
1514 | goto fallback_missing_features; | |
1515 | } else if (!perf_missing_features.sample_id_all) { | |
1516 | perf_missing_features.sample_id_all = true; | |
1517 | goto retry_sample_id; | |
bd0f8895 AK |
1518 | } else if (!perf_missing_features.lbr_flags && |
1519 | (evsel->attr.branch_sample_type & | |
1520 | (PERF_SAMPLE_BRANCH_NO_CYCLES | | |
1521 | PERF_SAMPLE_BRANCH_NO_FLAGS))) { | |
1522 | perf_missing_features.lbr_flags = true; | |
1523 | goto fallback_missing_features; | |
594ac61a | 1524 | } |
48290609 | 1525 | out_close: |
0252208e ACM |
1526 | do { |
1527 | while (--thread >= 0) { | |
1528 | close(FD(evsel, cpu, thread)); | |
1529 | FD(evsel, cpu, thread) = -1; | |
1530 | } | |
bf8e8f4b | 1531 | thread = nthreads; |
0252208e | 1532 | } while (--cpu >= 0); |
727ab04e ACM |
1533 | return err; |
1534 | } | |
1535 | ||
1536 | void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads) | |
1537 | { | |
1538 | if (evsel->fd == NULL) | |
1539 | return; | |
1540 | ||
1541 | perf_evsel__close_fd(evsel, ncpus, nthreads); | |
1542 | perf_evsel__free_fd(evsel); | |
48290609 ACM |
1543 | } |
1544 | ||
0252208e ACM |
1545 | static struct { |
1546 | struct cpu_map map; | |
1547 | int cpus[1]; | |
1548 | } empty_cpu_map = { | |
1549 | .map.nr = 1, | |
1550 | .cpus = { -1, }, | |
1551 | }; | |
1552 | ||
1553 | static struct { | |
1554 | struct thread_map map; | |
1555 | int threads[1]; | |
1556 | } empty_thread_map = { | |
1557 | .map.nr = 1, | |
1558 | .threads = { -1, }, | |
1559 | }; | |
1560 | ||
f08199d3 | 1561 | int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus, |
6a4bb04c | 1562 | struct thread_map *threads) |
48290609 | 1563 | { |
0252208e ACM |
1564 | if (cpus == NULL) { |
1565 | /* Work around old compiler warnings about strict aliasing */ | |
1566 | cpus = &empty_cpu_map.map; | |
48290609 ACM |
1567 | } |
1568 | ||
0252208e ACM |
1569 | if (threads == NULL) |
1570 | threads = &empty_thread_map.map; | |
48290609 | 1571 | |
6a4bb04c | 1572 | return __perf_evsel__open(evsel, cpus, threads); |
48290609 ACM |
1573 | } |
1574 | ||
f08199d3 | 1575 | int perf_evsel__open_per_cpu(struct perf_evsel *evsel, |
6a4bb04c | 1576 | struct cpu_map *cpus) |
48290609 | 1577 | { |
6a4bb04c | 1578 | return __perf_evsel__open(evsel, cpus, &empty_thread_map.map); |
0252208e | 1579 | } |
48290609 | 1580 | |
f08199d3 | 1581 | int perf_evsel__open_per_thread(struct perf_evsel *evsel, |
6a4bb04c | 1582 | struct thread_map *threads) |
0252208e | 1583 | { |
6a4bb04c | 1584 | return __perf_evsel__open(evsel, &empty_cpu_map.map, threads); |
48290609 | 1585 | } |
70082dd9 | 1586 | |
0807d2d8 ACM |
1587 | static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel, |
1588 | const union perf_event *event, | |
1589 | struct perf_sample *sample) | |
d0dd74e8 | 1590 | { |
0807d2d8 | 1591 | u64 type = evsel->attr.sample_type; |
d0dd74e8 | 1592 | const u64 *array = event->sample.array; |
0807d2d8 | 1593 | bool swapped = evsel->needs_swap; |
37073f9e | 1594 | union u64_swap u; |
d0dd74e8 ACM |
1595 | |
1596 | array += ((event->header.size - | |
1597 | sizeof(event->header)) / sizeof(u64)) - 1; | |
1598 | ||
75562573 AH |
1599 | if (type & PERF_SAMPLE_IDENTIFIER) { |
1600 | sample->id = *array; | |
1601 | array--; | |
1602 | } | |
1603 | ||
d0dd74e8 | 1604 | if (type & PERF_SAMPLE_CPU) { |
37073f9e JO |
1605 | u.val64 = *array; |
1606 | if (swapped) { | |
1607 | /* undo swap of u64, then swap on individual u32s */ | |
1608 | u.val64 = bswap_64(u.val64); | |
1609 | u.val32[0] = bswap_32(u.val32[0]); | |
1610 | } | |
1611 | ||
1612 | sample->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1613 | array--; |
1614 | } | |
1615 | ||
1616 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1617 | sample->stream_id = *array; | |
1618 | array--; | |
1619 | } | |
1620 | ||
1621 | if (type & PERF_SAMPLE_ID) { | |
1622 | sample->id = *array; | |
1623 | array--; | |
1624 | } | |
1625 | ||
1626 | if (type & PERF_SAMPLE_TIME) { | |
1627 | sample->time = *array; | |
1628 | array--; | |
1629 | } | |
1630 | ||
1631 | if (type & PERF_SAMPLE_TID) { | |
37073f9e JO |
1632 | u.val64 = *array; |
1633 | if (swapped) { | |
1634 | /* undo swap of u64, then swap on individual u32s */ | |
1635 | u.val64 = bswap_64(u.val64); | |
1636 | u.val32[0] = bswap_32(u.val32[0]); | |
1637 | u.val32[1] = bswap_32(u.val32[1]); | |
1638 | } | |
1639 | ||
1640 | sample->pid = u.val32[0]; | |
1641 | sample->tid = u.val32[1]; | |
dd44bc6b | 1642 | array--; |
d0dd74e8 ACM |
1643 | } |
1644 | ||
1645 | return 0; | |
1646 | } | |
1647 | ||
03b6ea9b AH |
1648 | static inline bool overflow(const void *endp, u16 max_size, const void *offset, |
1649 | u64 size) | |
98e1da90 | 1650 | { |
03b6ea9b AH |
1651 | return size > max_size || offset + size > endp; |
1652 | } | |
98e1da90 | 1653 | |
03b6ea9b AH |
1654 | #define OVERFLOW_CHECK(offset, size, max_size) \ |
1655 | do { \ | |
1656 | if (overflow(endp, (max_size), (offset), (size))) \ | |
1657 | return -EFAULT; \ | |
1658 | } while (0) | |
98e1da90 | 1659 | |
03b6ea9b AH |
1660 | #define OVERFLOW_CHECK_u64(offset) \ |
1661 | OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64)) | |
98e1da90 | 1662 | |
a3f698fe | 1663 | int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, |
0807d2d8 | 1664 | struct perf_sample *data) |
d0dd74e8 | 1665 | { |
a3f698fe | 1666 | u64 type = evsel->attr.sample_type; |
0807d2d8 | 1667 | bool swapped = evsel->needs_swap; |
d0dd74e8 | 1668 | const u64 *array; |
03b6ea9b AH |
1669 | u16 max_size = event->header.size; |
1670 | const void *endp = (void *)event + max_size; | |
1671 | u64 sz; | |
d0dd74e8 | 1672 | |
936be503 DA |
1673 | /* |
1674 | * used for cross-endian analysis. See git commit 65014ab3 | |
1675 | * for why this goofiness is needed. | |
1676 | */ | |
6a11f92e | 1677 | union u64_swap u; |
936be503 | 1678 | |
f3bda2c9 | 1679 | memset(data, 0, sizeof(*data)); |
d0dd74e8 ACM |
1680 | data->cpu = data->pid = data->tid = -1; |
1681 | data->stream_id = data->id = data->time = -1ULL; | |
bc529086 | 1682 | data->period = evsel->attr.sample_period; |
05484298 | 1683 | data->weight = 0; |
473398a2 | 1684 | data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
d0dd74e8 ACM |
1685 | |
1686 | if (event->header.type != PERF_RECORD_SAMPLE) { | |
a3f698fe | 1687 | if (!evsel->attr.sample_id_all) |
d0dd74e8 | 1688 | return 0; |
0807d2d8 | 1689 | return perf_evsel__parse_id_sample(evsel, event, data); |
d0dd74e8 ACM |
1690 | } |
1691 | ||
1692 | array = event->sample.array; | |
1693 | ||
03b6ea9b AH |
1694 | /* |
1695 | * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes | |
1696 | * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to | |
1697 | * check the format does not go past the end of the event. | |
1698 | */ | |
a3f698fe | 1699 | if (evsel->sample_size + sizeof(event->header) > event->header.size) |
a2854124 FW |
1700 | return -EFAULT; |
1701 | ||
75562573 AH |
1702 | data->id = -1ULL; |
1703 | if (type & PERF_SAMPLE_IDENTIFIER) { | |
1704 | data->id = *array; | |
1705 | array++; | |
1706 | } | |
1707 | ||
d0dd74e8 | 1708 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 1709 | data->ip = *array; |
d0dd74e8 ACM |
1710 | array++; |
1711 | } | |
1712 | ||
1713 | if (type & PERF_SAMPLE_TID) { | |
936be503 DA |
1714 | u.val64 = *array; |
1715 | if (swapped) { | |
1716 | /* undo swap of u64, then swap on individual u32s */ | |
1717 | u.val64 = bswap_64(u.val64); | |
1718 | u.val32[0] = bswap_32(u.val32[0]); | |
1719 | u.val32[1] = bswap_32(u.val32[1]); | |
1720 | } | |
1721 | ||
1722 | data->pid = u.val32[0]; | |
1723 | data->tid = u.val32[1]; | |
d0dd74e8 ACM |
1724 | array++; |
1725 | } | |
1726 | ||
1727 | if (type & PERF_SAMPLE_TIME) { | |
1728 | data->time = *array; | |
1729 | array++; | |
1730 | } | |
1731 | ||
7cec0922 | 1732 | data->addr = 0; |
d0dd74e8 ACM |
1733 | if (type & PERF_SAMPLE_ADDR) { |
1734 | data->addr = *array; | |
1735 | array++; | |
1736 | } | |
1737 | ||
d0dd74e8 ACM |
1738 | if (type & PERF_SAMPLE_ID) { |
1739 | data->id = *array; | |
1740 | array++; | |
1741 | } | |
1742 | ||
1743 | if (type & PERF_SAMPLE_STREAM_ID) { | |
1744 | data->stream_id = *array; | |
1745 | array++; | |
1746 | } | |
1747 | ||
1748 | if (type & PERF_SAMPLE_CPU) { | |
936be503 DA |
1749 | |
1750 | u.val64 = *array; | |
1751 | if (swapped) { | |
1752 | /* undo swap of u64, then swap on individual u32s */ | |
1753 | u.val64 = bswap_64(u.val64); | |
1754 | u.val32[0] = bswap_32(u.val32[0]); | |
1755 | } | |
1756 | ||
1757 | data->cpu = u.val32[0]; | |
d0dd74e8 ACM |
1758 | array++; |
1759 | } | |
1760 | ||
1761 | if (type & PERF_SAMPLE_PERIOD) { | |
1762 | data->period = *array; | |
1763 | array++; | |
1764 | } | |
1765 | ||
1766 | if (type & PERF_SAMPLE_READ) { | |
9ede473c JO |
1767 | u64 read_format = evsel->attr.read_format; |
1768 | ||
03b6ea9b | 1769 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1770 | if (read_format & PERF_FORMAT_GROUP) |
1771 | data->read.group.nr = *array; | |
1772 | else | |
1773 | data->read.one.value = *array; | |
1774 | ||
1775 | array++; | |
1776 | ||
1777 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
03b6ea9b | 1778 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1779 | data->read.time_enabled = *array; |
1780 | array++; | |
1781 | } | |
1782 | ||
1783 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
03b6ea9b | 1784 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1785 | data->read.time_running = *array; |
1786 | array++; | |
1787 | } | |
1788 | ||
1789 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1790 | if (read_format & PERF_FORMAT_GROUP) { | |
03b6ea9b AH |
1791 | const u64 max_group_nr = UINT64_MAX / |
1792 | sizeof(struct sample_read_value); | |
1793 | ||
1794 | if (data->read.group.nr > max_group_nr) | |
1795 | return -EFAULT; | |
1796 | sz = data->read.group.nr * | |
1797 | sizeof(struct sample_read_value); | |
1798 | OVERFLOW_CHECK(array, sz, max_size); | |
1799 | data->read.group.values = | |
1800 | (struct sample_read_value *)array; | |
1801 | array = (void *)array + sz; | |
9ede473c | 1802 | } else { |
03b6ea9b | 1803 | OVERFLOW_CHECK_u64(array); |
9ede473c JO |
1804 | data->read.one.id = *array; |
1805 | array++; | |
1806 | } | |
d0dd74e8 ACM |
1807 | } |
1808 | ||
1809 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
03b6ea9b | 1810 | const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); |
98e1da90 | 1811 | |
03b6ea9b AH |
1812 | OVERFLOW_CHECK_u64(array); |
1813 | data->callchain = (struct ip_callchain *)array++; | |
1814 | if (data->callchain->nr > max_callchain_nr) | |
98e1da90 | 1815 | return -EFAULT; |
03b6ea9b AH |
1816 | sz = data->callchain->nr * sizeof(u64); |
1817 | OVERFLOW_CHECK(array, sz, max_size); | |
1818 | array = (void *)array + sz; | |
d0dd74e8 ACM |
1819 | } |
1820 | ||
1821 | if (type & PERF_SAMPLE_RAW) { | |
03b6ea9b | 1822 | OVERFLOW_CHECK_u64(array); |
936be503 DA |
1823 | u.val64 = *array; |
1824 | if (WARN_ONCE(swapped, | |
1825 | "Endianness of raw data not corrected!\n")) { | |
1826 | /* undo swap of u64, then swap on individual u32s */ | |
1827 | u.val64 = bswap_64(u.val64); | |
1828 | u.val32[0] = bswap_32(u.val32[0]); | |
1829 | u.val32[1] = bswap_32(u.val32[1]); | |
1830 | } | |
936be503 | 1831 | data->raw_size = u.val32[0]; |
03b6ea9b | 1832 | array = (void *)array + sizeof(u32); |
98e1da90 | 1833 | |
03b6ea9b AH |
1834 | OVERFLOW_CHECK(array, data->raw_size, max_size); |
1835 | data->raw_data = (void *)array; | |
1836 | array = (void *)array + data->raw_size; | |
d0dd74e8 ACM |
1837 | } |
1838 | ||
b5387528 | 1839 | if (type & PERF_SAMPLE_BRANCH_STACK) { |
03b6ea9b AH |
1840 | const u64 max_branch_nr = UINT64_MAX / |
1841 | sizeof(struct branch_entry); | |
b5387528 | 1842 | |
03b6ea9b AH |
1843 | OVERFLOW_CHECK_u64(array); |
1844 | data->branch_stack = (struct branch_stack *)array++; | |
b5387528 | 1845 | |
03b6ea9b AH |
1846 | if (data->branch_stack->nr > max_branch_nr) |
1847 | return -EFAULT; | |
b5387528 | 1848 | sz = data->branch_stack->nr * sizeof(struct branch_entry); |
03b6ea9b AH |
1849 | OVERFLOW_CHECK(array, sz, max_size); |
1850 | array = (void *)array + sz; | |
b5387528 | 1851 | } |
0f6a3015 JO |
1852 | |
1853 | if (type & PERF_SAMPLE_REGS_USER) { | |
03b6ea9b | 1854 | OVERFLOW_CHECK_u64(array); |
5b95a4a3 AH |
1855 | data->user_regs.abi = *array; |
1856 | array++; | |
0f6a3015 | 1857 | |
5b95a4a3 | 1858 | if (data->user_regs.abi) { |
352ea45a | 1859 | u64 mask = evsel->attr.sample_regs_user; |
03b6ea9b | 1860 | |
352ea45a | 1861 | sz = hweight_long(mask) * sizeof(u64); |
03b6ea9b | 1862 | OVERFLOW_CHECK(array, sz, max_size); |
352ea45a | 1863 | data->user_regs.mask = mask; |
0f6a3015 | 1864 | data->user_regs.regs = (u64 *)array; |
03b6ea9b | 1865 | array = (void *)array + sz; |
0f6a3015 JO |
1866 | } |
1867 | } | |
1868 | ||
1869 | if (type & PERF_SAMPLE_STACK_USER) { | |
03b6ea9b AH |
1870 | OVERFLOW_CHECK_u64(array); |
1871 | sz = *array++; | |
0f6a3015 JO |
1872 | |
1873 | data->user_stack.offset = ((char *)(array - 1) | |
1874 | - (char *) event); | |
1875 | ||
03b6ea9b | 1876 | if (!sz) { |
0f6a3015 JO |
1877 | data->user_stack.size = 0; |
1878 | } else { | |
03b6ea9b | 1879 | OVERFLOW_CHECK(array, sz, max_size); |
0f6a3015 | 1880 | data->user_stack.data = (char *)array; |
03b6ea9b AH |
1881 | array = (void *)array + sz; |
1882 | OVERFLOW_CHECK_u64(array); | |
54bd2692 | 1883 | data->user_stack.size = *array++; |
a65cb4b9 JO |
1884 | if (WARN_ONCE(data->user_stack.size > sz, |
1885 | "user stack dump failure\n")) | |
1886 | return -EFAULT; | |
0f6a3015 JO |
1887 | } |
1888 | } | |
1889 | ||
05484298 AK |
1890 | data->weight = 0; |
1891 | if (type & PERF_SAMPLE_WEIGHT) { | |
03b6ea9b | 1892 | OVERFLOW_CHECK_u64(array); |
05484298 AK |
1893 | data->weight = *array; |
1894 | array++; | |
1895 | } | |
1896 | ||
98a3b32c SE |
1897 | data->data_src = PERF_MEM_DATA_SRC_NONE; |
1898 | if (type & PERF_SAMPLE_DATA_SRC) { | |
03b6ea9b | 1899 | OVERFLOW_CHECK_u64(array); |
98a3b32c SE |
1900 | data->data_src = *array; |
1901 | array++; | |
1902 | } | |
1903 | ||
475eeab9 AK |
1904 | data->transaction = 0; |
1905 | if (type & PERF_SAMPLE_TRANSACTION) { | |
87b95524 | 1906 | OVERFLOW_CHECK_u64(array); |
475eeab9 AK |
1907 | data->transaction = *array; |
1908 | array++; | |
1909 | } | |
1910 | ||
6a21c0b5 SE |
1911 | data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE; |
1912 | if (type & PERF_SAMPLE_REGS_INTR) { | |
1913 | OVERFLOW_CHECK_u64(array); | |
1914 | data->intr_regs.abi = *array; | |
1915 | array++; | |
1916 | ||
1917 | if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) { | |
1918 | u64 mask = evsel->attr.sample_regs_intr; | |
1919 | ||
1920 | sz = hweight_long(mask) * sizeof(u64); | |
1921 | OVERFLOW_CHECK(array, sz, max_size); | |
1922 | data->intr_regs.mask = mask; | |
1923 | data->intr_regs.regs = (u64 *)array; | |
1924 | array = (void *)array + sz; | |
1925 | } | |
1926 | } | |
1927 | ||
d0dd74e8 ACM |
1928 | return 0; |
1929 | } | |
74eec26f | 1930 | |
b1cf6f65 | 1931 | size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, |
352ea45a | 1932 | u64 read_format) |
b1cf6f65 AH |
1933 | { |
1934 | size_t sz, result = sizeof(struct sample_event); | |
1935 | ||
1936 | if (type & PERF_SAMPLE_IDENTIFIER) | |
1937 | result += sizeof(u64); | |
1938 | ||
1939 | if (type & PERF_SAMPLE_IP) | |
1940 | result += sizeof(u64); | |
1941 | ||
1942 | if (type & PERF_SAMPLE_TID) | |
1943 | result += sizeof(u64); | |
1944 | ||
1945 | if (type & PERF_SAMPLE_TIME) | |
1946 | result += sizeof(u64); | |
1947 | ||
1948 | if (type & PERF_SAMPLE_ADDR) | |
1949 | result += sizeof(u64); | |
1950 | ||
1951 | if (type & PERF_SAMPLE_ID) | |
1952 | result += sizeof(u64); | |
1953 | ||
1954 | if (type & PERF_SAMPLE_STREAM_ID) | |
1955 | result += sizeof(u64); | |
1956 | ||
1957 | if (type & PERF_SAMPLE_CPU) | |
1958 | result += sizeof(u64); | |
1959 | ||
1960 | if (type & PERF_SAMPLE_PERIOD) | |
1961 | result += sizeof(u64); | |
1962 | ||
1963 | if (type & PERF_SAMPLE_READ) { | |
1964 | result += sizeof(u64); | |
1965 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
1966 | result += sizeof(u64); | |
1967 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
1968 | result += sizeof(u64); | |
1969 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
1970 | if (read_format & PERF_FORMAT_GROUP) { | |
1971 | sz = sample->read.group.nr * | |
1972 | sizeof(struct sample_read_value); | |
1973 | result += sz; | |
1974 | } else { | |
1975 | result += sizeof(u64); | |
1976 | } | |
1977 | } | |
1978 | ||
1979 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
1980 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
1981 | result += sz; | |
1982 | } | |
1983 | ||
1984 | if (type & PERF_SAMPLE_RAW) { | |
1985 | result += sizeof(u32); | |
1986 | result += sample->raw_size; | |
1987 | } | |
1988 | ||
1989 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
1990 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
1991 | sz += sizeof(u64); | |
1992 | result += sz; | |
1993 | } | |
1994 | ||
1995 | if (type & PERF_SAMPLE_REGS_USER) { | |
1996 | if (sample->user_regs.abi) { | |
1997 | result += sizeof(u64); | |
352ea45a | 1998 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
b1cf6f65 AH |
1999 | result += sz; |
2000 | } else { | |
2001 | result += sizeof(u64); | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | if (type & PERF_SAMPLE_STACK_USER) { | |
2006 | sz = sample->user_stack.size; | |
2007 | result += sizeof(u64); | |
2008 | if (sz) { | |
2009 | result += sz; | |
2010 | result += sizeof(u64); | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | if (type & PERF_SAMPLE_WEIGHT) | |
2015 | result += sizeof(u64); | |
2016 | ||
2017 | if (type & PERF_SAMPLE_DATA_SRC) | |
2018 | result += sizeof(u64); | |
2019 | ||
42d88910 AH |
2020 | if (type & PERF_SAMPLE_TRANSACTION) |
2021 | result += sizeof(u64); | |
2022 | ||
6a21c0b5 SE |
2023 | if (type & PERF_SAMPLE_REGS_INTR) { |
2024 | if (sample->intr_regs.abi) { | |
2025 | result += sizeof(u64); | |
2026 | sz = hweight_long(sample->intr_regs.mask) * sizeof(u64); | |
2027 | result += sz; | |
2028 | } else { | |
2029 | result += sizeof(u64); | |
2030 | } | |
2031 | } | |
2032 | ||
b1cf6f65 AH |
2033 | return result; |
2034 | } | |
2035 | ||
74eec26f | 2036 | int perf_event__synthesize_sample(union perf_event *event, u64 type, |
352ea45a | 2037 | u64 read_format, |
74eec26f AV |
2038 | const struct perf_sample *sample, |
2039 | bool swapped) | |
2040 | { | |
2041 | u64 *array; | |
d03f2170 | 2042 | size_t sz; |
74eec26f AV |
2043 | /* |
2044 | * used for cross-endian analysis. See git commit 65014ab3 | |
2045 | * for why this goofiness is needed. | |
2046 | */ | |
6a11f92e | 2047 | union u64_swap u; |
74eec26f AV |
2048 | |
2049 | array = event->sample.array; | |
2050 | ||
75562573 AH |
2051 | if (type & PERF_SAMPLE_IDENTIFIER) { |
2052 | *array = sample->id; | |
2053 | array++; | |
2054 | } | |
2055 | ||
74eec26f | 2056 | if (type & PERF_SAMPLE_IP) { |
ef89325f | 2057 | *array = sample->ip; |
74eec26f AV |
2058 | array++; |
2059 | } | |
2060 | ||
2061 | if (type & PERF_SAMPLE_TID) { | |
2062 | u.val32[0] = sample->pid; | |
2063 | u.val32[1] = sample->tid; | |
2064 | if (swapped) { | |
2065 | /* | |
a3f698fe | 2066 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
2067 | */ |
2068 | u.val32[0] = bswap_32(u.val32[0]); | |
2069 | u.val32[1] = bswap_32(u.val32[1]); | |
2070 | u.val64 = bswap_64(u.val64); | |
2071 | } | |
2072 | ||
2073 | *array = u.val64; | |
2074 | array++; | |
2075 | } | |
2076 | ||
2077 | if (type & PERF_SAMPLE_TIME) { | |
2078 | *array = sample->time; | |
2079 | array++; | |
2080 | } | |
2081 | ||
2082 | if (type & PERF_SAMPLE_ADDR) { | |
2083 | *array = sample->addr; | |
2084 | array++; | |
2085 | } | |
2086 | ||
2087 | if (type & PERF_SAMPLE_ID) { | |
2088 | *array = sample->id; | |
2089 | array++; | |
2090 | } | |
2091 | ||
2092 | if (type & PERF_SAMPLE_STREAM_ID) { | |
2093 | *array = sample->stream_id; | |
2094 | array++; | |
2095 | } | |
2096 | ||
2097 | if (type & PERF_SAMPLE_CPU) { | |
2098 | u.val32[0] = sample->cpu; | |
2099 | if (swapped) { | |
2100 | /* | |
a3f698fe | 2101 | * Inverse of what is done in perf_evsel__parse_sample |
74eec26f AV |
2102 | */ |
2103 | u.val32[0] = bswap_32(u.val32[0]); | |
2104 | u.val64 = bswap_64(u.val64); | |
2105 | } | |
2106 | *array = u.val64; | |
2107 | array++; | |
2108 | } | |
2109 | ||
2110 | if (type & PERF_SAMPLE_PERIOD) { | |
2111 | *array = sample->period; | |
2112 | array++; | |
2113 | } | |
2114 | ||
d03f2170 AH |
2115 | if (type & PERF_SAMPLE_READ) { |
2116 | if (read_format & PERF_FORMAT_GROUP) | |
2117 | *array = sample->read.group.nr; | |
2118 | else | |
2119 | *array = sample->read.one.value; | |
2120 | array++; | |
2121 | ||
2122 | if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { | |
2123 | *array = sample->read.time_enabled; | |
2124 | array++; | |
2125 | } | |
2126 | ||
2127 | if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { | |
2128 | *array = sample->read.time_running; | |
2129 | array++; | |
2130 | } | |
2131 | ||
2132 | /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ | |
2133 | if (read_format & PERF_FORMAT_GROUP) { | |
2134 | sz = sample->read.group.nr * | |
2135 | sizeof(struct sample_read_value); | |
2136 | memcpy(array, sample->read.group.values, sz); | |
2137 | array = (void *)array + sz; | |
2138 | } else { | |
2139 | *array = sample->read.one.id; | |
2140 | array++; | |
2141 | } | |
2142 | } | |
2143 | ||
2144 | if (type & PERF_SAMPLE_CALLCHAIN) { | |
2145 | sz = (sample->callchain->nr + 1) * sizeof(u64); | |
2146 | memcpy(array, sample->callchain, sz); | |
2147 | array = (void *)array + sz; | |
2148 | } | |
2149 | ||
2150 | if (type & PERF_SAMPLE_RAW) { | |
2151 | u.val32[0] = sample->raw_size; | |
2152 | if (WARN_ONCE(swapped, | |
2153 | "Endianness of raw data not corrected!\n")) { | |
2154 | /* | |
2155 | * Inverse of what is done in perf_evsel__parse_sample | |
2156 | */ | |
2157 | u.val32[0] = bswap_32(u.val32[0]); | |
2158 | u.val32[1] = bswap_32(u.val32[1]); | |
2159 | u.val64 = bswap_64(u.val64); | |
2160 | } | |
2161 | *array = u.val64; | |
2162 | array = (void *)array + sizeof(u32); | |
2163 | ||
2164 | memcpy(array, sample->raw_data, sample->raw_size); | |
2165 | array = (void *)array + sample->raw_size; | |
2166 | } | |
2167 | ||
2168 | if (type & PERF_SAMPLE_BRANCH_STACK) { | |
2169 | sz = sample->branch_stack->nr * sizeof(struct branch_entry); | |
2170 | sz += sizeof(u64); | |
2171 | memcpy(array, sample->branch_stack, sz); | |
2172 | array = (void *)array + sz; | |
2173 | } | |
2174 | ||
2175 | if (type & PERF_SAMPLE_REGS_USER) { | |
2176 | if (sample->user_regs.abi) { | |
2177 | *array++ = sample->user_regs.abi; | |
352ea45a | 2178 | sz = hweight_long(sample->user_regs.mask) * sizeof(u64); |
d03f2170 AH |
2179 | memcpy(array, sample->user_regs.regs, sz); |
2180 | array = (void *)array + sz; | |
2181 | } else { | |
2182 | *array++ = 0; | |
2183 | } | |
2184 | } | |
2185 | ||
2186 | if (type & PERF_SAMPLE_STACK_USER) { | |
2187 | sz = sample->user_stack.size; | |
2188 | *array++ = sz; | |
2189 | if (sz) { | |
2190 | memcpy(array, sample->user_stack.data, sz); | |
2191 | array = (void *)array + sz; | |
2192 | *array++ = sz; | |
2193 | } | |
2194 | } | |
2195 | ||
2196 | if (type & PERF_SAMPLE_WEIGHT) { | |
2197 | *array = sample->weight; | |
2198 | array++; | |
2199 | } | |
2200 | ||
2201 | if (type & PERF_SAMPLE_DATA_SRC) { | |
2202 | *array = sample->data_src; | |
2203 | array++; | |
2204 | } | |
2205 | ||
42d88910 AH |
2206 | if (type & PERF_SAMPLE_TRANSACTION) { |
2207 | *array = sample->transaction; | |
2208 | array++; | |
2209 | } | |
2210 | ||
6a21c0b5 SE |
2211 | if (type & PERF_SAMPLE_REGS_INTR) { |
2212 | if (sample->intr_regs.abi) { | |
2213 | *array++ = sample->intr_regs.abi; | |
2214 | sz = hweight_long(sample->intr_regs.mask) * sizeof(u64); | |
2215 | memcpy(array, sample->intr_regs.regs, sz); | |
2216 | array = (void *)array + sz; | |
2217 | } else { | |
2218 | *array++ = 0; | |
2219 | } | |
2220 | } | |
2221 | ||
74eec26f AV |
2222 | return 0; |
2223 | } | |
5555ded4 | 2224 | |
efd2b924 ACM |
2225 | struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name) |
2226 | { | |
2227 | return pevent_find_field(evsel->tp_format, name); | |
2228 | } | |
2229 | ||
5d2074ea | 2230 | void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample, |
5555ded4 ACM |
2231 | const char *name) |
2232 | { | |
efd2b924 | 2233 | struct format_field *field = perf_evsel__field(evsel, name); |
5555ded4 ACM |
2234 | int offset; |
2235 | ||
efd2b924 ACM |
2236 | if (!field) |
2237 | return NULL; | |
5555ded4 ACM |
2238 | |
2239 | offset = field->offset; | |
2240 | ||
2241 | if (field->flags & FIELD_IS_DYNAMIC) { | |
2242 | offset = *(int *)(sample->raw_data + field->offset); | |
2243 | offset &= 0xffff; | |
2244 | } | |
2245 | ||
2246 | return sample->raw_data + offset; | |
2247 | } | |
2248 | ||
90525176 ACM |
2249 | u64 format_field__intval(struct format_field *field, struct perf_sample *sample, |
2250 | bool needs_swap) | |
5555ded4 | 2251 | { |
e6b6f679 | 2252 | u64 value; |
90525176 | 2253 | void *ptr = sample->raw_data + field->offset; |
5555ded4 | 2254 | |
e6b6f679 ACM |
2255 | switch (field->size) { |
2256 | case 1: | |
2257 | return *(u8 *)ptr; | |
2258 | case 2: | |
2259 | value = *(u16 *)ptr; | |
2260 | break; | |
2261 | case 4: | |
2262 | value = *(u32 *)ptr; | |
2263 | break; | |
2264 | case 8: | |
e94eedab | 2265 | memcpy(&value, ptr, sizeof(u64)); |
e6b6f679 ACM |
2266 | break; |
2267 | default: | |
2268 | return 0; | |
2269 | } | |
2270 | ||
90525176 | 2271 | if (!needs_swap) |
e6b6f679 ACM |
2272 | return value; |
2273 | ||
2274 | switch (field->size) { | |
2275 | case 2: | |
2276 | return bswap_16(value); | |
2277 | case 4: | |
2278 | return bswap_32(value); | |
2279 | case 8: | |
2280 | return bswap_64(value); | |
2281 | default: | |
2282 | return 0; | |
2283 | } | |
2284 | ||
2285 | return 0; | |
5555ded4 | 2286 | } |
0698aedd | 2287 | |
90525176 ACM |
2288 | u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample, |
2289 | const char *name) | |
2290 | { | |
2291 | struct format_field *field = perf_evsel__field(evsel, name); | |
2292 | ||
2293 | if (!field) | |
2294 | return 0; | |
2295 | ||
2296 | return field ? format_field__intval(field, sample, evsel->needs_swap) : 0; | |
2297 | } | |
2298 | ||
c0a54341 ACM |
2299 | bool perf_evsel__fallback(struct perf_evsel *evsel, int err, |
2300 | char *msg, size_t msgsize) | |
2301 | { | |
08094828 ACM |
2302 | int paranoid; |
2303 | ||
2b821cce | 2304 | if ((err == ENOENT || err == ENXIO || err == ENODEV) && |
c0a54341 ACM |
2305 | evsel->attr.type == PERF_TYPE_HARDWARE && |
2306 | evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) { | |
2307 | /* | |
2308 | * If it's cycles then fall back to hrtimer based | |
2309 | * cpu-clock-tick sw counter, which is always available even if | |
2310 | * no PMU support. | |
2311 | * | |
2312 | * PPC returns ENXIO until 2.6.37 (behavior changed with commit | |
2313 | * b0a873e). | |
2314 | */ | |
2315 | scnprintf(msg, msgsize, "%s", | |
2316 | "The cycles event is not supported, trying to fall back to cpu-clock-ticks"); | |
2317 | ||
2318 | evsel->attr.type = PERF_TYPE_SOFTWARE; | |
2319 | evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK; | |
2320 | ||
04662523 | 2321 | zfree(&evsel->name); |
08094828 ACM |
2322 | return true; |
2323 | } else if (err == EACCES && !evsel->attr.exclude_kernel && | |
2324 | (paranoid = perf_event_paranoid()) > 1) { | |
2325 | const char *name = perf_evsel__name(evsel); | |
2326 | char *new_name; | |
2327 | ||
2328 | if (asprintf(&new_name, "%s%su", name, strchr(name, ':') ? "" : ":") < 0) | |
2329 | return false; | |
2330 | ||
2331 | if (evsel->name) | |
2332 | free(evsel->name); | |
2333 | evsel->name = new_name; | |
2334 | scnprintf(msg, msgsize, | |
2335 | "kernel.perf_event_paranoid=%d, trying to fall back to excluding kernel samples", paranoid); | |
2336 | evsel->attr.exclude_kernel = 1; | |
2337 | ||
c0a54341 ACM |
2338 | return true; |
2339 | } | |
2340 | ||
2341 | return false; | |
2342 | } | |
56e52e85 | 2343 | |
602ad878 | 2344 | int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, |
56e52e85 ACM |
2345 | int err, char *msg, size_t size) |
2346 | { | |
6e81c74c MH |
2347 | char sbuf[STRERR_BUFSIZE]; |
2348 | ||
56e52e85 ACM |
2349 | switch (err) { |
2350 | case EPERM: | |
2351 | case EACCES: | |
b69e63a4 | 2352 | return scnprintf(msg, size, |
3379e0c3 BH |
2353 | "You may not have permission to collect %sstats.\n\n" |
2354 | "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n" | |
2355 | "which controls use of the performance events system by\n" | |
2356 | "unprivileged users (without CAP_SYS_ADMIN).\n\n" | |
7d173913 | 2357 | "The current value is %d:\n\n" |
3379e0c3 BH |
2358 | " -1: Allow use of (almost) all events by all users\n" |
2359 | ">= 0: Disallow raw tracepoint access by users without CAP_IOC_LOCK\n" | |
2360 | ">= 1: Disallow CPU event access by users without CAP_SYS_ADMIN\n" | |
2361 | ">= 2: Disallow kernel profiling by users without CAP_SYS_ADMIN", | |
7d173913 ACM |
2362 | target->system_wide ? "system-wide " : "", |
2363 | perf_event_paranoid()); | |
56e52e85 ACM |
2364 | case ENOENT: |
2365 | return scnprintf(msg, size, "The %s event is not supported.", | |
2366 | perf_evsel__name(evsel)); | |
2367 | case EMFILE: | |
2368 | return scnprintf(msg, size, "%s", | |
2369 | "Too many events are opened.\n" | |
18ffdfe8 JO |
2370 | "Probably the maximum number of open file descriptors has been reached.\n" |
2371 | "Hint: Try again after reducing the number of events.\n" | |
2372 | "Hint: Try increasing the limit with 'ulimit -n <limit>'"); | |
de46d526 ACM |
2373 | case ENOMEM: |
2374 | if ((evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) != 0 && | |
2375 | access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0) | |
2376 | return scnprintf(msg, size, | |
2377 | "Not enough memory to setup event with callchain.\n" | |
2378 | "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n" | |
2379 | "Hint: Current value: %d", sysctl_perf_event_max_stack); | |
2380 | break; | |
56e52e85 ACM |
2381 | case ENODEV: |
2382 | if (target->cpu_list) | |
2383 | return scnprintf(msg, size, "%s", | |
81d64f46 | 2384 | "No such device - did you specify an out-of-range profile CPU?"); |
56e52e85 ACM |
2385 | break; |
2386 | case EOPNOTSUPP: | |
dc89e75a VG |
2387 | if (evsel->attr.sample_period != 0) |
2388 | return scnprintf(msg, size, "%s", | |
2389 | "PMU Hardware doesn't support sampling/overflow-interrupts."); | |
56e52e85 ACM |
2390 | if (evsel->attr.precise_ip) |
2391 | return scnprintf(msg, size, "%s", | |
2392 | "\'precise\' request may not be supported. Try removing 'p' modifier."); | |
2393 | #if defined(__i386__) || defined(__x86_64__) | |
2394 | if (evsel->attr.type == PERF_TYPE_HARDWARE) | |
2395 | return scnprintf(msg, size, "%s", | |
2396 | "No hardware sampling interrupt available.\n" | |
2397 | "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it."); | |
2398 | #endif | |
2399 | break; | |
63914aca JO |
2400 | case EBUSY: |
2401 | if (find_process("oprofiled")) | |
2402 | return scnprintf(msg, size, | |
2403 | "The PMU counters are busy/taken by another profiler.\n" | |
2404 | "We found oprofile daemon running, please stop it and try again."); | |
2405 | break; | |
814c8c38 | 2406 | case EINVAL: |
7da36e94 ACM |
2407 | if (evsel->overwrite && perf_missing_features.write_backward) |
2408 | return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel."); | |
814c8c38 PZ |
2409 | if (perf_missing_features.clockid) |
2410 | return scnprintf(msg, size, "clockid feature not supported."); | |
2411 | if (perf_missing_features.clockid_wrong) | |
2412 | return scnprintf(msg, size, "wrong clockid (%d).", clockid); | |
2413 | break; | |
56e52e85 ACM |
2414 | default: |
2415 | break; | |
2416 | } | |
2417 | ||
2418 | return scnprintf(msg, size, | |
6e81c74c | 2419 | "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" |
56e52e85 | 2420 | "/bin/dmesg may provide additional information.\n" |
81d64f46 | 2421 | "No CONFIG_PERF_EVENTS=y kernel support configured?", |
6e81c74c MH |
2422 | err, strerror_r(err, sbuf, sizeof(sbuf)), |
2423 | perf_evsel__name(evsel)); | |
56e52e85 | 2424 | } |