blob: a59710f88d8acb91a1567c5d082f2b7d6c3c54ba [file] [log] [blame]
Arnaldo Carvalho de Melof8a95302011-01-30 10:46:46 -02001/*
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
David Ahern936be502011-09-06 09:12:26 -060010#include <byteswap.h>
Jiri Olsa0f6a3012012-08-07 15:20:45 +020011#include <linux/bitops.h>
Borislav Petkov553873e2013-12-09 17:14:23 +010012#include <api/fs/debugfs.h>
Robert Richter4e319022013-06-11 17:29:18 +020013#include <traceevent/event-parse.h>
14#include <linux/hw_breakpoint.h>
15#include <linux/perf_event.h>
Andi Kleenbec19672013-08-04 19:41:26 -070016#include <sys/resource.h>
Robert Richter4e319022013-06-11 17:29:18 +020017#include "asm/bug.h"
Arnaldo Carvalho de Melo8f651ea2014-10-09 16:12:24 -030018#include "callchain.h"
Arnaldo Carvalho de Melof14d5702014-10-17 12:17:40 -030019#include "cgroup.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020020#include "evsel.h"
Arnaldo Carvalho de Melo70082dd2011-01-12 17:03:24 -020021#include "evlist.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020022#include "util.h"
Arnaldo Carvalho de Melo86bd5e82011-01-03 23:09:46 -020023#include "cpumap.h"
Arnaldo Carvalho de Melofd782602011-01-18 15:15:24 -020024#include "thread_map.h"
Namhyung Kim12864b32012-04-26 14:15:22 +090025#include "target.h"
Jiri Olsa26d33022012-08-07 15:20:47 +020026#include "perf_regs.h"
Adrian Huntere3e1a542013-08-14 15:48:24 +030027#include "debug.h"
Jiri Olsa97978b32013-12-03 14:09:24 +010028#include "trace-event.h"
Jiri Olsaa9a3a4d2015-06-14 10:19:26 +020029#include "stat.h"
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -020030
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -030031static struct {
32 bool sample_id_all;
33 bool exclude_guest;
Stephane Eranian5c5e8542013-08-21 12:10:25 +020034 bool mmap2;
Yann Droneaud57480d22014-06-30 22:28:47 +020035 bool cloexec;
Peter Zijlstra814c8c32015-03-31 00:19:31 +020036 bool clockid;
37 bool clockid_wrong;
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -030038} perf_missing_features;
39
Peter Zijlstra814c8c32015-03-31 00:19:31 +020040static clockid_t clockid;
41
Arnaldo Carvalho de Meloce8ccff2014-10-09 15:29:51 -030042static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
43{
44 return 0;
45}
46
47static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
48{
49}
50
51static struct {
52 size_t size;
53 int (*init)(struct perf_evsel *evsel);
54 void (*fini)(struct perf_evsel *evsel);
55} perf_evsel__object = {
56 .size = sizeof(struct perf_evsel),
57 .init = perf_evsel__no_extra_init,
58 .fini = perf_evsel__no_extra_fini,
59};
60
61int perf_evsel__object_config(size_t object_size,
62 int (*init)(struct perf_evsel *evsel),
63 void (*fini)(struct perf_evsel *evsel))
64{
65
66 if (object_size == 0)
67 goto set_methods;
68
69 if (perf_evsel__object.size > object_size)
70 return -EINVAL;
71
72 perf_evsel__object.size = object_size;
73
74set_methods:
75 if (init != NULL)
76 perf_evsel__object.init = init;
77
78 if (fini != NULL)
79 perf_evsel__object.fini = fini;
80
81 return 0;
82}
83
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -020084#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
85
Adrian Hunter75562572013-08-27 11:23:09 +030086int __perf_evsel__sample_size(u64 sample_type)
Arnaldo Carvalho de Meloc2a70652011-06-02 11:04:54 -030087{
88 u64 mask = sample_type & PERF_SAMPLE_MASK;
89 int size = 0;
90 int i;
91
92 for (i = 0; i < 64; i++) {
93 if (mask & (1ULL << i))
94 size++;
95 }
96
97 size *= sizeof(u64);
98
99 return size;
100}
101
Adrian Hunter75562572013-08-27 11:23:09 +0300102/**
103 * __perf_evsel__calc_id_pos - calculate id_pos.
104 * @sample_type: sample type
105 *
106 * This function returns the position of the event id (PERF_SAMPLE_ID or
107 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
108 * sample_event.
109 */
110static int __perf_evsel__calc_id_pos(u64 sample_type)
111{
112 int idx = 0;
113
114 if (sample_type & PERF_SAMPLE_IDENTIFIER)
115 return 0;
116
117 if (!(sample_type & PERF_SAMPLE_ID))
118 return -1;
119
120 if (sample_type & PERF_SAMPLE_IP)
121 idx += 1;
122
123 if (sample_type & PERF_SAMPLE_TID)
124 idx += 1;
125
126 if (sample_type & PERF_SAMPLE_TIME)
127 idx += 1;
128
129 if (sample_type & PERF_SAMPLE_ADDR)
130 idx += 1;
131
132 return idx;
133}
134
135/**
136 * __perf_evsel__calc_is_pos - calculate is_pos.
137 * @sample_type: sample type
138 *
139 * This function returns the position (counting backwards) of the event id
140 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
141 * sample_id_all is used there is an id sample appended to non-sample events.
142 */
143static int __perf_evsel__calc_is_pos(u64 sample_type)
144{
145 int idx = 1;
146
147 if (sample_type & PERF_SAMPLE_IDENTIFIER)
148 return 1;
149
150 if (!(sample_type & PERF_SAMPLE_ID))
151 return -1;
152
153 if (sample_type & PERF_SAMPLE_CPU)
154 idx += 1;
155
156 if (sample_type & PERF_SAMPLE_STREAM_ID)
157 idx += 1;
158
159 return idx;
160}
161
162void perf_evsel__calc_id_pos(struct perf_evsel *evsel)
163{
164 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->attr.sample_type);
165 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->attr.sample_type);
166}
167
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300168void __perf_evsel__set_sample_bit(struct perf_evsel *evsel,
169 enum perf_event_sample_format bit)
170{
171 if (!(evsel->attr.sample_type & bit)) {
172 evsel->attr.sample_type |= bit;
173 evsel->sample_size += sizeof(u64);
Adrian Hunter75562572013-08-27 11:23:09 +0300174 perf_evsel__calc_id_pos(evsel);
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300175 }
176}
177
178void __perf_evsel__reset_sample_bit(struct perf_evsel *evsel,
179 enum perf_event_sample_format bit)
180{
181 if (evsel->attr.sample_type & bit) {
182 evsel->attr.sample_type &= ~bit;
183 evsel->sample_size -= sizeof(u64);
Adrian Hunter75562572013-08-27 11:23:09 +0300184 perf_evsel__calc_id_pos(evsel);
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300185 }
186}
187
Adrian Hunter75562572013-08-27 11:23:09 +0300188void perf_evsel__set_sample_id(struct perf_evsel *evsel,
189 bool can_sample_identifier)
Arnaldo Carvalho de Melo7a5a5ca2012-12-10 15:21:30 -0300190{
Adrian Hunter75562572013-08-27 11:23:09 +0300191 if (can_sample_identifier) {
192 perf_evsel__reset_sample_bit(evsel, ID);
193 perf_evsel__set_sample_bit(evsel, IDENTIFIER);
194 } else {
195 perf_evsel__set_sample_bit(evsel, ID);
196 }
Arnaldo Carvalho de Melo7a5a5ca2012-12-10 15:21:30 -0300197 evsel->attr.read_format |= PERF_FORMAT_ID;
198}
199
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200200void perf_evsel__init(struct perf_evsel *evsel,
201 struct perf_event_attr *attr, int idx)
202{
203 evsel->idx = idx;
Adrian Hunter60b08962014-07-31 09:00:52 +0300204 evsel->tracking = !idx;
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200205 evsel->attr = *attr;
Namhyung Kim2cfda562012-11-29 15:38:29 +0900206 evsel->leader = evsel;
Stephane Eranian410136f2013-11-12 17:58:49 +0100207 evsel->unit = "";
208 evsel->scale = 1.0;
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200209 INIT_LIST_HEAD(&evsel->node);
Jiri Olsa930a2e22015-07-29 05:42:10 -0400210 INIT_LIST_HEAD(&evsel->config_terms);
Arnaldo Carvalho de Meloce8ccff2014-10-09 15:29:51 -0300211 perf_evsel__object.init(evsel);
Arnaldo Carvalho de Melobde09462012-08-01 18:53:11 -0300212 evsel->sample_size = __perf_evsel__sample_size(attr->sample_type);
Adrian Hunter75562572013-08-27 11:23:09 +0300213 perf_evsel__calc_id_pos(evsel);
Wang Nan15bfd2c2015-07-10 07:36:09 +0000214 evsel->cmdline_group_boundary = false;
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200215}
216
Arnaldo Carvalho de Meloef503832013-11-07 16:41:19 -0300217struct perf_evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200218{
Arnaldo Carvalho de Meloce8ccff2014-10-09 15:29:51 -0300219 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200220
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200221 if (evsel != NULL)
222 perf_evsel__init(evsel, attr, idx);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200223
224 return evsel;
225}
226
Arnaldo Carvalho de Meloef503832013-11-07 16:41:19 -0300227struct perf_evsel *perf_evsel__newtp_idx(const char *sys, const char *name, int idx)
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300228{
Arnaldo Carvalho de Meloce8ccff2014-10-09 15:29:51 -0300229 struct perf_evsel *evsel = zalloc(perf_evsel__object.size);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300230
231 if (evsel != NULL) {
232 struct perf_event_attr attr = {
Arnaldo Carvalho de Melo0b80f8b32012-09-26 12:28:26 -0300233 .type = PERF_TYPE_TRACEPOINT,
234 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
235 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300236 };
237
Arnaldo Carvalho de Meloe48ffe22012-09-26 17:11:38 -0300238 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
239 goto out_free;
240
Jiri Olsa97978b32013-12-03 14:09:24 +0100241 evsel->tp_format = trace_event__tp_format(sys, name);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300242 if (evsel->tp_format == NULL)
243 goto out_free;
244
Arnaldo Carvalho de Melo0b80f8b32012-09-26 12:28:26 -0300245 event_attr_init(&attr);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300246 attr.config = evsel->tp_format->id;
Arnaldo Carvalho de Melo0b80f8b32012-09-26 12:28:26 -0300247 attr.sample_period = 1;
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300248 perf_evsel__init(evsel, &attr, idx);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300249 }
250
251 return evsel;
252
253out_free:
Arnaldo Carvalho de Melo74cf2492013-12-27 16:55:14 -0300254 zfree(&evsel->name);
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -0300255 free(evsel);
256 return NULL;
257}
258
Arnaldo Carvalho de Melo8ad70132012-09-06 13:11:18 -0300259const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300260 "cycles",
261 "instructions",
262 "cache-references",
263 "cache-misses",
264 "branches",
265 "branch-misses",
266 "bus-cycles",
267 "stalled-cycles-frontend",
268 "stalled-cycles-backend",
269 "ref-cycles",
270};
271
Arnaldo Carvalho de Melodd4f5222012-06-13 15:52:42 -0300272static const char *__perf_evsel__hw_name(u64 config)
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300273{
274 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
275 return perf_evsel__hw_names[config];
276
277 return "unknown-hardware";
278}
279
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300280static int perf_evsel__add_modifiers(struct perf_evsel *evsel, char *bf, size_t size)
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300281{
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300282 int colon = 0, r = 0;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300283 struct perf_event_attr *attr = &evsel->attr;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300284 bool exclude_guest_default = false;
285
286#define MOD_PRINT(context, mod) do { \
287 if (!attr->exclude_##context) { \
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300288 if (!colon) colon = ++r; \
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300289 r += scnprintf(bf + r, size - r, "%c", mod); \
290 } } while(0)
291
292 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
293 MOD_PRINT(kernel, 'k');
294 MOD_PRINT(user, 'u');
295 MOD_PRINT(hv, 'h');
296 exclude_guest_default = true;
297 }
298
299 if (attr->precise_ip) {
300 if (!colon)
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300301 colon = ++r;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300302 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
303 exclude_guest_default = true;
304 }
305
306 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
307 MOD_PRINT(host, 'H');
308 MOD_PRINT(guest, 'G');
309 }
310#undef MOD_PRINT
311 if (colon)
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300312 bf[colon - 1] = ':';
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300313 return r;
314}
315
Arnaldo Carvalho de Melo27f18612012-06-11 13:33:09 -0300316static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
317{
318 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(evsel->attr.config));
319 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
320}
321
Arnaldo Carvalho de Melo8ad70132012-09-06 13:11:18 -0300322const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300323 "cpu-clock",
324 "task-clock",
325 "page-faults",
326 "context-switches",
Arnaldo Carvalho de Melo8ad70132012-09-06 13:11:18 -0300327 "cpu-migrations",
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300328 "minor-faults",
329 "major-faults",
330 "alignment-faults",
331 "emulation-faults",
Adrian Hunterd22d1a22013-08-31 21:50:52 +0300332 "dummy",
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300333};
334
Arnaldo Carvalho de Melodd4f5222012-06-13 15:52:42 -0300335static const char *__perf_evsel__sw_name(u64 config)
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300336{
337 if (config < PERF_COUNT_SW_MAX && perf_evsel__sw_names[config])
338 return perf_evsel__sw_names[config];
339 return "unknown-software";
340}
341
342static int perf_evsel__sw_name(struct perf_evsel *evsel, char *bf, size_t size)
343{
344 int r = scnprintf(bf, size, "%s", __perf_evsel__sw_name(evsel->attr.config));
345 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
346}
347
Jiri Olsa287e74a2012-06-28 23:18:49 +0200348static int __perf_evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
349{
350 int r;
351
352 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
353
354 if (type & HW_BREAKPOINT_R)
355 r += scnprintf(bf + r, size - r, "r");
356
357 if (type & HW_BREAKPOINT_W)
358 r += scnprintf(bf + r, size - r, "w");
359
360 if (type & HW_BREAKPOINT_X)
361 r += scnprintf(bf + r, size - r, "x");
362
363 return r;
364}
365
366static int perf_evsel__bp_name(struct perf_evsel *evsel, char *bf, size_t size)
367{
368 struct perf_event_attr *attr = &evsel->attr;
369 int r = __perf_evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
370 return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
371}
372
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300373const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
374 [PERF_EVSEL__MAX_ALIASES] = {
375 { "L1-dcache", "l1-d", "l1d", "L1-data", },
376 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
377 { "LLC", "L2", },
378 { "dTLB", "d-tlb", "Data-TLB", },
379 { "iTLB", "i-tlb", "Instruction-TLB", },
380 { "branch", "branches", "bpu", "btb", "bpc", },
381 { "node", },
382};
383
384const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
385 [PERF_EVSEL__MAX_ALIASES] = {
386 { "load", "loads", "read", },
387 { "store", "stores", "write", },
388 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
389};
390
391const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
392 [PERF_EVSEL__MAX_ALIASES] = {
393 { "refs", "Reference", "ops", "access", },
394 { "misses", "miss", },
395};
396
397#define C(x) PERF_COUNT_HW_CACHE_##x
398#define CACHE_READ (1 << C(OP_READ))
399#define CACHE_WRITE (1 << C(OP_WRITE))
400#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
401#define COP(x) (1 << x)
402
403/*
404 * cache operartion stat
405 * L1I : Read and prefetch only
406 * ITLB and BPU : Read-only
407 */
408static unsigned long perf_evsel__hw_cache_stat[C(MAX)] = {
409 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
410 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
411 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
412 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
413 [C(ITLB)] = (CACHE_READ),
414 [C(BPU)] = (CACHE_READ),
415 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
416};
417
418bool perf_evsel__is_cache_op_valid(u8 type, u8 op)
419{
420 if (perf_evsel__hw_cache_stat[type] & COP(op))
421 return true; /* valid */
422 else
423 return false; /* invalid */
424}
425
426int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
427 char *bf, size_t size)
428{
429 if (result) {
430 return scnprintf(bf, size, "%s-%s-%s", perf_evsel__hw_cache[type][0],
431 perf_evsel__hw_cache_op[op][0],
432 perf_evsel__hw_cache_result[result][0]);
433 }
434
435 return scnprintf(bf, size, "%s-%s", perf_evsel__hw_cache[type][0],
436 perf_evsel__hw_cache_op[op][1]);
437}
438
Arnaldo Carvalho de Melodd4f5222012-06-13 15:52:42 -0300439static int __perf_evsel__hw_cache_name(u64 config, char *bf, size_t size)
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300440{
441 u8 op, result, type = (config >> 0) & 0xff;
442 const char *err = "unknown-ext-hardware-cache-type";
443
444 if (type > PERF_COUNT_HW_CACHE_MAX)
445 goto out_err;
446
447 op = (config >> 8) & 0xff;
448 err = "unknown-ext-hardware-cache-op";
449 if (op > PERF_COUNT_HW_CACHE_OP_MAX)
450 goto out_err;
451
452 result = (config >> 16) & 0xff;
453 err = "unknown-ext-hardware-cache-result";
454 if (result > PERF_COUNT_HW_CACHE_RESULT_MAX)
455 goto out_err;
456
457 err = "invalid-cache";
458 if (!perf_evsel__is_cache_op_valid(type, op))
459 goto out_err;
460
461 return __perf_evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
462out_err:
463 return scnprintf(bf, size, "%s", err);
464}
465
466static int perf_evsel__hw_cache_name(struct perf_evsel *evsel, char *bf, size_t size)
467{
468 int ret = __perf_evsel__hw_cache_name(evsel->attr.config, bf, size);
469 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
470}
471
Arnaldo Carvalho de Melo6eef3d92012-06-13 11:53:37 -0300472static int perf_evsel__raw_name(struct perf_evsel *evsel, char *bf, size_t size)
473{
474 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
475 return ret + perf_evsel__add_modifiers(evsel, bf + ret, size - ret);
476}
477
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300478const char *perf_evsel__name(struct perf_evsel *evsel)
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300479{
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300480 char bf[128];
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300481
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300482 if (evsel->name)
483 return evsel->name;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300484
485 switch (evsel->attr.type) {
486 case PERF_TYPE_RAW:
Arnaldo Carvalho de Melo6eef3d92012-06-13 11:53:37 -0300487 perf_evsel__raw_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300488 break;
489
490 case PERF_TYPE_HARDWARE:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300491 perf_evsel__hw_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300492 break;
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300493
494 case PERF_TYPE_HW_CACHE:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300495 perf_evsel__hw_cache_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Melo0b668bc2012-06-11 14:08:07 -0300496 break;
497
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300498 case PERF_TYPE_SOFTWARE:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300499 perf_evsel__sw_name(evsel, bf, sizeof(bf));
Arnaldo Carvalho de Melo335c2f52012-06-11 14:36:20 -0300500 break;
501
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300502 case PERF_TYPE_TRACEPOINT:
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300503 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300504 break;
505
Jiri Olsa287e74a2012-06-28 23:18:49 +0200506 case PERF_TYPE_BREAKPOINT:
507 perf_evsel__bp_name(evsel, bf, sizeof(bf));
508 break;
509
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300510 default:
Robert Richterca1b1452012-08-16 21:10:18 +0200511 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
512 evsel->attr.type);
Arnaldo Carvalho de Meloa4460832012-06-12 10:29:12 -0300513 break;
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300514 }
515
Arnaldo Carvalho de Melo7289f832012-06-12 12:34:58 -0300516 evsel->name = strdup(bf);
517
518 return evsel->name ?: "unknown";
Arnaldo Carvalho de Meloc4104312012-05-25 16:38:11 -0300519}
520
Namhyung Kim717e2632013-01-22 18:09:44 +0900521const char *perf_evsel__group_name(struct perf_evsel *evsel)
522{
523 return evsel->group_name ?: "anon group";
524}
525
526int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size)
527{
528 int ret;
529 struct perf_evsel *pos;
530 const char *group_name = perf_evsel__group_name(evsel);
531
532 ret = scnprintf(buf, size, "%s", group_name);
533
534 ret += scnprintf(buf + ret, size - ret, " { %s",
535 perf_evsel__name(evsel));
536
537 for_each_group_member(pos, evsel)
538 ret += scnprintf(buf + ret, size - ret, ", %s",
539 perf_evsel__name(pos));
540
541 ret += scnprintf(buf + ret, size - ret, " }");
542
543 return ret;
544}
545
Jiri Olsa6bedfab2014-03-02 16:56:40 +0100546static void
Kan Liangaad2b212015-01-05 13:23:04 -0500547perf_evsel__config_callgraph(struct perf_evsel *evsel,
Kan Liangc3a6a8c2015-08-04 04:30:20 -0400548 struct record_opts *opts,
549 struct callchain_param *param)
Jiri Olsa6bedfab2014-03-02 16:56:40 +0100550{
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
Kan Liangc3a6a8c2015-08-04 04:30:20 -0400556 if (param->record_mode == CALLCHAIN_LBR) {
Kan Liangaad2b212015-01-05 13:23:04 -0500557 if (!opts->branch_stack) {
558 if (attr->exclude_user) {
559 pr_warning("LBR callstack option is only available "
560 "to get user callchain information. "
561 "Falling back to framepointers.\n");
562 } else {
563 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
564 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
565 PERF_SAMPLE_BRANCH_CALL_STACK;
566 }
567 } else
568 pr_warning("Cannot use LBR callstack with branch stack. "
569 "Falling back to framepointers.\n");
570 }
571
Kan Liangc3a6a8c2015-08-04 04:30:20 -0400572 if (param->record_mode == CALLCHAIN_DWARF) {
Jiri Olsa6bedfab2014-03-02 16:56:40 +0100573 if (!function) {
574 perf_evsel__set_sample_bit(evsel, REGS_USER);
575 perf_evsel__set_sample_bit(evsel, STACK_USER);
576 attr->sample_regs_user = PERF_REGS_MASK;
Kan Liangc3a6a8c2015-08-04 04:30:20 -0400577 attr->sample_stack_user = param->dump_size;
Jiri Olsa6bedfab2014-03-02 16:56:40 +0100578 attr->exclude_callchain_user = 1;
579 } else {
580 pr_info("Cannot use DWARF unwind for function trace event,"
581 " falling back to framepointers.\n");
582 }
583 }
584
585 if (function) {
586 pr_info("Disabling user space callchains for function trace event.\n");
587 attr->exclude_callchain_user = 1;
588 }
589}
590
Kan Liang32067712015-08-04 04:30:19 -0400591static void apply_config_terms(struct perf_evsel *evsel)
Jiri Olsa930a2e22015-07-29 05:42:10 -0400592{
593 struct perf_evsel_config_term *term;
Kan Liang32067712015-08-04 04:30:19 -0400594 struct list_head *config_terms = &evsel->config_terms;
595 struct perf_event_attr *attr = &evsel->attr;
Jiri Olsa930a2e22015-07-29 05:42:10 -0400596
597 list_for_each_entry(term, config_terms, list) {
598 switch (term->type) {
Jiri Olsaee4c7582015-07-29 05:42:11 -0400599 case PERF_EVSEL__CONFIG_TERM_PERIOD:
600 attr->sample_period = term->val.period;
Jiri Olsaab35a7d2015-08-08 19:12:10 +0200601 attr->freq = 0;
Kan Liang32067712015-08-04 04:30:19 -0400602 break;
603 case PERF_EVSEL__CONFIG_TERM_TIME:
604 if (term->val.time)
605 perf_evsel__set_sample_bit(evsel, TIME);
606 else
607 perf_evsel__reset_sample_bit(evsel, TIME);
608 break;
Jiri Olsa930a2e22015-07-29 05:42:10 -0400609 default:
610 break;
611 }
612 }
613}
614
Jiri Olsa774cb492012-11-12 18:34:01 +0100615/*
616 * The enable_on_exec/disabled value strategy:
617 *
618 * 1) For any type of traced program:
619 * - all independent events and group leaders are disabled
620 * - all group members are enabled
621 *
622 * Group members are ruled by group leaders. They need to
623 * be enabled, because the group scheduling relies on that.
624 *
625 * 2) For traced programs executed by perf:
626 * - all independent events and group leaders have
627 * enable_on_exec set
628 * - we don't specifically enable or disable any event during
629 * the record command
630 *
631 * Independent events and group leaders are initially disabled
632 * and get enabled by exec. Group members are ruled by group
633 * leaders as stated in 1).
634 *
635 * 3) For traced programs attached by perf (pid/tid):
636 * - we specifically enable or disable all events during
637 * the record command
638 *
639 * When attaching events to already running traced we
640 * enable/disable events specifically, as there's no
641 * initial traced exec call.
642 */
Arnaldo Carvalho de Melob4006792013-12-19 14:43:45 -0300643void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200644{
Jiri Olsa3c176312012-10-10 17:39:03 +0200645 struct perf_evsel *leader = evsel->leader;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200646 struct perf_event_attr *attr = &evsel->attr;
Adrian Hunter60b08962014-07-31 09:00:52 +0300647 int track = evsel->tracking;
Adrian Hunter3aa59392013-11-15 15:52:29 +0200648 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200649
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -0300650 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200651 attr->inherit = !opts->no_inherit;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200652
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300653 perf_evsel__set_sample_bit(evsel, IP);
654 perf_evsel__set_sample_bit(evsel, TID);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200655
Jiri Olsa3c176312012-10-10 17:39:03 +0200656 if (evsel->sample_read) {
657 perf_evsel__set_sample_bit(evsel, READ);
658
659 /*
660 * We need ID even in case of single event, because
661 * PERF_SAMPLE_READ process ID specific data.
662 */
Adrian Hunter75562572013-08-27 11:23:09 +0300663 perf_evsel__set_sample_id(evsel, false);
Jiri Olsa3c176312012-10-10 17:39:03 +0200664
665 /*
666 * Apply group format only if we belong to group
667 * with more than one members.
668 */
669 if (leader->nr_members > 1) {
670 attr->read_format |= PERF_FORMAT_GROUP;
671 attr->inherit = 0;
672 }
673 }
674
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200675 /*
Namhyung Kim17314e22014-06-09 14:43:37 +0900676 * We default some events to have a default interval. But keep
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200677 * it a weak assumption overridable by the user.
678 */
Namhyung Kim17314e22014-06-09 14:43:37 +0900679 if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200680 opts->user_interval != ULLONG_MAX)) {
681 if (opts->freq) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300682 perf_evsel__set_sample_bit(evsel, PERIOD);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200683 attr->freq = 1;
684 attr->sample_freq = opts->freq;
685 } else {
686 attr->sample_period = opts->default_interval;
687 }
688 }
689
Jiri Olsa3c176312012-10-10 17:39:03 +0200690 /*
691 * Disable sampling for all group members other
692 * than leader in case leader 'leads' the sampling.
693 */
694 if ((leader != evsel) && leader->sample_read) {
695 attr->sample_freq = 0;
696 attr->sample_period = 0;
697 }
698
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200699 if (opts->no_samples)
700 attr->sample_freq = 0;
701
702 if (opts->inherit_stat)
703 attr->inherit_stat = 1;
704
705 if (opts->sample_address) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300706 perf_evsel__set_sample_bit(evsel, ADDR);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200707 attr->mmap_data = track;
708 }
709
Jiri Olsaf1403732014-11-13 18:21:03 +0100710 /*
711 * We don't allow user space callchains for function trace
712 * event, due to issues with page faults while tracing page
713 * fault handler and its overall trickiness nature.
714 */
715 if (perf_evsel__is_function_event(evsel))
716 evsel->attr.exclude_callchain_user = 1;
717
Namhyung Kim72a128a2014-09-23 10:01:41 +0900718 if (callchain_param.enabled && !evsel->no_aux_samples)
Kan Liangc3a6a8c2015-08-04 04:30:20 -0400719 perf_evsel__config_callgraph(evsel, opts, &callchain_param);
Jiri Olsa26d33022012-08-07 15:20:47 +0200720
Stephane Eranian6a21c0b2014-09-24 13:48:39 +0200721 if (opts->sample_intr_regs) {
722 attr->sample_regs_intr = PERF_REGS_MASK;
723 perf_evsel__set_sample_bit(evsel, REGS_INTR);
724 }
725
Adrian Hunter3aa59392013-11-15 15:52:29 +0200726 if (target__has_cpu(&opts->target))
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300727 perf_evsel__set_sample_bit(evsel, CPU);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200728
Andrew Vagin3e76ac72011-12-20 17:32:45 +0300729 if (opts->period)
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300730 perf_evsel__set_sample_bit(evsel, PERIOD);
Andrew Vagin3e76ac72011-12-20 17:32:45 +0300731
Andi Kleen8affc2b2014-07-31 14:45:04 +0800732 /*
733 * When the user explicitely disabled time don't force it here.
734 */
735 if (opts->sample_time &&
736 (!perf_missing_features.sample_id_all &&
Adrian Hunter3abebc52015-07-06 14:51:01 +0300737 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
738 opts->sample_time_set)))
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300739 perf_evsel__set_sample_bit(evsel, TIME);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200740
Adrian Hunter6ff1ce72014-07-14 13:02:56 +0300741 if (opts->raw_samples && !evsel->no_aux_samples) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300742 perf_evsel__set_sample_bit(evsel, TIME);
743 perf_evsel__set_sample_bit(evsel, RAW);
744 perf_evsel__set_sample_bit(evsel, CPU);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200745 }
746
Stephane Eranianccf49bf2013-01-24 16:10:37 +0100747 if (opts->sample_address)
Adrian Hunter1e7ed5e2013-11-01 15:51:35 +0200748 perf_evsel__set_sample_bit(evsel, DATA_SRC);
Stephane Eranianccf49bf2013-01-24 16:10:37 +0100749
Arnaldo Carvalho de Melo509051e2014-01-14 17:52:14 -0300750 if (opts->no_buffering) {
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200751 attr->watermark = 0;
752 attr->wakeup_events = 1;
753 }
Adrian Hunter6ff1ce72014-07-14 13:02:56 +0300754 if (opts->branch_stack && !evsel->no_aux_samples) {
Arnaldo Carvalho de Melo7be5ebe2012-12-10 14:53:43 -0300755 perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
Roberto Agostino Vitillobdfebd82012-02-09 23:21:02 +0100756 attr->branch_sample_type = opts->branch_stack;
757 }
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200758
Andi Kleen05484292013-01-24 16:10:29 +0100759 if (opts->sample_weight)
Adrian Hunter1e7ed5e2013-11-01 15:51:35 +0200760 perf_evsel__set_sample_bit(evsel, WEIGHT);
Andi Kleen05484292013-01-24 16:10:29 +0100761
Namhyung Kim62e503b2015-01-29 17:06:46 +0900762 attr->task = track;
Stephane Eranian5c5e8542013-08-21 12:10:25 +0200763 attr->mmap = track;
Don Zickusa5a5ba72014-05-30 10:49:42 -0400764 attr->mmap2 = track && !perf_missing_features.mmap2;
Stephane Eranian5c5e8542013-08-21 12:10:25 +0200765 attr->comm = track;
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200766
Adrian Hunterb757bb02015-07-21 12:44:04 +0300767 if (opts->record_switch_events)
768 attr->context_switch = track;
769
Andi Kleen475eeab2013-09-20 07:40:43 -0700770 if (opts->sample_transaction)
Adrian Hunter1e7ed5e2013-11-01 15:51:35 +0200771 perf_evsel__set_sample_bit(evsel, TRANSACTION);
Andi Kleen475eeab2013-09-20 07:40:43 -0700772
Andi Kleen85c273d2015-02-24 15:13:40 -0800773 if (opts->running_time) {
774 evsel->attr.read_format |=
775 PERF_FORMAT_TOTAL_TIME_ENABLED |
776 PERF_FORMAT_TOTAL_TIME_RUNNING;
777 }
778
Jiri Olsa774cb492012-11-12 18:34:01 +0100779 /*
780 * XXX see the function comment above
781 *
782 * Disabling only independent events or group leaders,
783 * keeping group members enabled.
784 */
Namhyung Kim823254e2012-11-29 15:38:30 +0900785 if (perf_evsel__is_group_leader(evsel))
Jiri Olsa774cb492012-11-12 18:34:01 +0100786 attr->disabled = 1;
787
788 /*
789 * Setting enable_on_exec for independent events and
790 * group leaders for traced executed by perf.
791 */
Andi Kleen6619a532014-01-11 13:38:27 -0800792 if (target__none(&opts->target) && perf_evsel__is_group_leader(evsel) &&
793 !opts->initial_delay)
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200794 attr->enable_on_exec = 1;
Adrian Hunter2afd2bc2014-07-14 13:02:57 +0300795
796 if (evsel->immediate) {
797 attr->disabled = 0;
798 attr->enable_on_exec = 0;
799 }
Peter Zijlstra814c8c32015-03-31 00:19:31 +0200800
801 clockid = opts->clockid;
802 if (opts->use_clockid) {
803 attr->use_clockid = 1;
804 attr->clockid = opts->clockid;
805 }
Jiri Olsa930a2e22015-07-29 05:42:10 -0400806
807 /*
808 * Apply event specific term settings,
809 * it overloads any global configuration.
810 */
Kan Liang32067712015-08-04 04:30:19 -0400811 apply_config_terms(evsel);
Arnaldo Carvalho de Melo0f82ebc2011-11-08 14:41:57 -0200812}
813
Arnaldo Carvalho de Melo88858462014-10-13 13:30:27 -0300814static int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200815{
David Ahern4af4c952011-05-27 09:58:34 -0600816 int cpu, thread;
Adrian Hunterbf8e8f42014-07-31 09:00:51 +0300817
818 if (evsel->system_wide)
819 nthreads = 1;
820
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200821 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
David Ahern4af4c952011-05-27 09:58:34 -0600822
823 if (evsel->fd) {
824 for (cpu = 0; cpu < ncpus; cpu++) {
825 for (thread = 0; thread < nthreads; thread++) {
826 FD(evsel, cpu, thread) = -1;
827 }
828 }
829 }
830
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200831 return evsel->fd != NULL ? 0 : -ENOMEM;
832}
833
Andi Kleene2407be2013-08-02 17:41:10 -0700834static int perf_evsel__run_ioctl(struct perf_evsel *evsel, int ncpus, int nthreads,
835 int ioc, void *arg)
Arnaldo Carvalho de Melo745cefc2012-09-26 15:07:39 -0300836{
837 int cpu, thread;
838
Adrian Hunterbf8e8f42014-07-31 09:00:51 +0300839 if (evsel->system_wide)
840 nthreads = 1;
841
Arnaldo Carvalho de Melo745cefc2012-09-26 15:07:39 -0300842 for (cpu = 0; cpu < ncpus; cpu++) {
843 for (thread = 0; thread < nthreads; thread++) {
844 int fd = FD(evsel, cpu, thread),
Andi Kleene2407be2013-08-02 17:41:10 -0700845 err = ioctl(fd, ioc, arg);
Arnaldo Carvalho de Melo745cefc2012-09-26 15:07:39 -0300846
847 if (err)
848 return err;
849 }
850 }
851
852 return 0;
853}
854
Arnaldo Carvalho de Melof47805a2015-07-03 15:53:49 -0300855int perf_evsel__apply_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
856 const char *filter)
Andi Kleene2407be2013-08-02 17:41:10 -0700857{
858 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
859 PERF_EVENT_IOC_SET_FILTER,
860 (void *)filter);
861}
862
Arnaldo Carvalho de Melo12467ae2015-07-03 17:05:50 -0300863int perf_evsel__set_filter(struct perf_evsel *evsel, const char *filter)
864{
865 char *new_filter = strdup(filter);
866
867 if (new_filter != NULL) {
868 free(evsel->filter);
869 evsel->filter = new_filter;
870 return 0;
871 }
872
873 return -1;
874}
875
Arnaldo Carvalho de Melo64ec84f2015-07-04 12:19:13 -0300876int perf_evsel__append_filter(struct perf_evsel *evsel,
877 const char *op, const char *filter)
878{
879 char *new_filter;
880
881 if (evsel->filter == NULL)
882 return perf_evsel__set_filter(evsel, filter);
883
884 if (asprintf(&new_filter,"(%s) %s (%s)", evsel->filter, op, filter) > 0) {
885 free(evsel->filter);
886 evsel->filter = new_filter;
887 return 0;
888 }
889
890 return -1;
891}
892
Andi Kleene2407be2013-08-02 17:41:10 -0700893int perf_evsel__enable(struct perf_evsel *evsel, int ncpus, int nthreads)
894{
895 return perf_evsel__run_ioctl(evsel, ncpus, nthreads,
896 PERF_EVENT_IOC_ENABLE,
897 0);
898}
899
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200900int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
901{
Vineet Gupta8d9cbd82015-01-13 19:13:23 +0530902 if (ncpus == 0 || nthreads == 0)
903 return 0;
904
Adrian Hunterbf8e8f42014-07-31 09:00:51 +0300905 if (evsel->system_wide)
906 nthreads = 1;
907
Arnaldo Carvalho de Meloa91e5432011-03-10 11:15:54 -0300908 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
909 if (evsel->sample_id == NULL)
910 return -ENOMEM;
911
912 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
913 if (evsel->id == NULL) {
914 xyarray__delete(evsel->sample_id);
915 evsel->sample_id = NULL;
916 return -ENOMEM;
917 }
918
919 return 0;
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200920}
921
Arnaldo Carvalho de Melo88858462014-10-13 13:30:27 -0300922static void perf_evsel__free_fd(struct perf_evsel *evsel)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200923{
924 xyarray__delete(evsel->fd);
925 evsel->fd = NULL;
926}
927
Arnaldo Carvalho de Melo88858462014-10-13 13:30:27 -0300928static void perf_evsel__free_id(struct perf_evsel *evsel)
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200929{
Arnaldo Carvalho de Meloa91e5432011-03-10 11:15:54 -0300930 xyarray__delete(evsel->sample_id);
931 evsel->sample_id = NULL;
Arnaldo Carvalho de Melo04662522013-12-26 17:41:15 -0300932 zfree(&evsel->id);
Arnaldo Carvalho de Melo70db7532011-01-12 22:39:13 -0200933}
934
Jiri Olsa930a2e22015-07-29 05:42:10 -0400935static void perf_evsel__free_config_terms(struct perf_evsel *evsel)
936{
937 struct perf_evsel_config_term *term, *h;
938
939 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
940 list_del(&term->list);
941 free(term);
942 }
943}
944
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200945void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
946{
947 int cpu, thread;
948
Adrian Hunterbf8e8f42014-07-31 09:00:51 +0300949 if (evsel->system_wide)
950 nthreads = 1;
951
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200952 for (cpu = 0; cpu < ncpus; cpu++)
953 for (thread = 0; thread < nthreads; ++thread) {
954 close(FD(evsel, cpu, thread));
955 FD(evsel, cpu, thread) = -1;
956 }
957}
958
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200959void perf_evsel__exit(struct perf_evsel *evsel)
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200960{
961 assert(list_empty(&evsel->node));
Namhyung Kim736b05a2013-03-15 14:48:49 +0900962 perf_evsel__free_fd(evsel);
963 perf_evsel__free_id(evsel);
Jiri Olsa930a2e22015-07-29 05:42:10 -0400964 perf_evsel__free_config_terms(evsel);
Arnaldo Carvalho de Melo597e48c2014-10-16 13:25:01 -0300965 close_cgroup(evsel->cgrp);
Jiri Olsaf30a79b2015-06-23 00:36:04 +0200966 cpu_map__put(evsel->cpus);
Jiri Olsa578e91e2015-06-23 00:36:07 +0200967 thread_map__put(evsel->threads);
Arnaldo Carvalho de Melo597e48c2014-10-16 13:25:01 -0300968 zfree(&evsel->group_name);
Arnaldo Carvalho de Melo597e48c2014-10-16 13:25:01 -0300969 zfree(&evsel->name);
Arnaldo Carvalho de Meloce8ccff2014-10-09 15:29:51 -0300970 perf_evsel__object.fini(evsel);
Arnaldo Carvalho de Meloef1d1af2011-01-18 21:41:45 -0200971}
972
973void perf_evsel__delete(struct perf_evsel *evsel)
974{
975 perf_evsel__exit(evsel);
Arnaldo Carvalho de Melo69aad6f2011-01-03 16:39:04 -0200976 free(evsel);
977}
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -0200978
Jiri Olsaa6fa0032015-06-26 11:29:11 +0200979void perf_evsel__compute_deltas(struct perf_evsel *evsel, int cpu, int thread,
Jiri Olsa857a94a2014-11-21 10:31:05 +0100980 struct perf_counts_values *count)
Stephane Eranianc7a79c42013-01-29 12:47:43 +0100981{
982 struct perf_counts_values tmp;
983
984 if (!evsel->prev_raw_counts)
985 return;
986
987 if (cpu == -1) {
988 tmp = evsel->prev_raw_counts->aggr;
989 evsel->prev_raw_counts->aggr = *count;
990 } else {
Jiri Olsaa6fa0032015-06-26 11:29:11 +0200991 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
992 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
Stephane Eranianc7a79c42013-01-29 12:47:43 +0100993 }
994
995 count->val = count->val - tmp.val;
996 count->ena = count->ena - tmp.ena;
997 count->run = count->run - tmp.run;
998}
999
Jiri Olsa13112bb2014-11-21 10:31:06 +01001000void perf_counts_values__scale(struct perf_counts_values *count,
1001 bool scale, s8 *pscaled)
1002{
1003 s8 scaled = 0;
1004
1005 if (scale) {
1006 if (count->run == 0) {
1007 scaled = -1;
1008 count->val = 0;
1009 } else if (count->run < count->ena) {
1010 scaled = 1;
1011 count->val = (u64)((double) count->val * count->ena / count->run + 0.5);
1012 }
1013 } else
1014 count->ena = count->run = 0;
1015
1016 if (pscaled)
1017 *pscaled = scaled;
1018}
1019
Jiri Olsaf99f47192015-06-26 11:29:18 +02001020int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread,
1021 struct perf_counts_values *count)
1022{
1023 memset(count, 0, sizeof(*count));
1024
1025 if (FD(evsel, cpu, thread) < 0)
1026 return -EINVAL;
1027
1028 if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0)
1029 return -errno;
1030
1031 return 0;
1032}
1033
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -02001034int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
1035 int cpu, int thread, bool scale)
1036{
1037 struct perf_counts_values count;
1038 size_t nv = scale ? 3 : 1;
1039
1040 if (FD(evsel, cpu, thread) < 0)
1041 return -EINVAL;
1042
Jiri Olsaa6fa0032015-06-26 11:29:11 +02001043 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
Arnaldo Carvalho de Melo4eed11d2011-01-04 00:13:17 -02001044 return -ENOMEM;
1045
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -02001046 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
1047 return -errno;
1048
Jiri Olsaa6fa0032015-06-26 11:29:11 +02001049 perf_evsel__compute_deltas(evsel, cpu, thread, &count);
Jiri Olsa13112bb2014-11-21 10:31:06 +01001050 perf_counts_values__scale(&count, scale, NULL);
Jiri Olsaa6fa0032015-06-26 11:29:11 +02001051 *perf_counts(evsel->counts, cpu, thread) = count;
Arnaldo Carvalho de Meloc52b12e2011-01-03 17:45:52 -02001052 return 0;
1053}
1054
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001055static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
1056{
1057 struct perf_evsel *leader = evsel->leader;
1058 int fd;
1059
Namhyung Kim823254e2012-11-29 15:38:30 +09001060 if (perf_evsel__is_group_leader(evsel))
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001061 return -1;
1062
1063 /*
1064 * Leader must be already processed/open,
1065 * if not it's a bug.
1066 */
1067 BUG_ON(!leader->fd);
1068
1069 fd = FD(leader, cpu, thread);
1070 BUG_ON(fd == -1);
1071
1072 return fd;
1073}
1074
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001075struct bit_names {
1076 int bit;
1077 const char *name;
1078};
Adrian Huntere3e1a542013-08-14 15:48:24 +03001079
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001080static void __p_bits(char *buf, size_t size, u64 value, struct bit_names *bits)
Adrian Huntere3e1a542013-08-14 15:48:24 +03001081{
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001082 bool first_bit = true;
1083 int i = 0;
Adrian Huntere3e1a542013-08-14 15:48:24 +03001084
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001085 do {
1086 if (value & bits[i].bit) {
1087 buf += scnprintf(buf, size, "%s%s", first_bit ? "" : "|", bits[i].name);
1088 first_bit = false;
1089 }
1090 } while (bits[++i].name != NULL);
1091}
Adrian Huntere3e1a542013-08-14 15:48:24 +03001092
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001093static void __p_sample_type(char *buf, size_t size, u64 value)
1094{
1095#define bit_name(n) { PERF_SAMPLE_##n, #n }
1096 struct bit_names bits[] = {
1097 bit_name(IP), bit_name(TID), bit_name(TIME), bit_name(ADDR),
1098 bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
1099 bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
1100 bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
1101 bit_name(IDENTIFIER), bit_name(REGS_INTR),
1102 { .name = NULL, }
1103 };
1104#undef bit_name
1105 __p_bits(buf, size, value, bits);
1106}
Adrian Huntere3e1a542013-08-14 15:48:24 +03001107
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001108static void __p_read_format(char *buf, size_t size, u64 value)
1109{
1110#define bit_name(n) { PERF_FORMAT_##n, #n }
1111 struct bit_names bits[] = {
1112 bit_name(TOTAL_TIME_ENABLED), bit_name(TOTAL_TIME_RUNNING),
1113 bit_name(ID), bit_name(GROUP),
1114 { .name = NULL, }
1115 };
1116#undef bit_name
1117 __p_bits(buf, size, value, bits);
1118}
Peter Zijlstra814c8c32015-03-31 00:19:31 +02001119
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001120#define BUF_SIZE 1024
Adrian Huntere3e1a542013-08-14 15:48:24 +03001121
Adrian Hunter7310aed2015-06-11 15:51:04 +03001122#define p_hex(val) snprintf(buf, BUF_SIZE, "%#"PRIx64, (uint64_t)(val))
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001123#define p_unsigned(val) snprintf(buf, BUF_SIZE, "%"PRIu64, (uint64_t)(val))
1124#define p_signed(val) snprintf(buf, BUF_SIZE, "%"PRId64, (int64_t)(val))
1125#define p_sample_type(val) __p_sample_type(buf, BUF_SIZE, val)
1126#define p_read_format(val) __p_read_format(buf, BUF_SIZE, val)
Adrian Huntere3e1a542013-08-14 15:48:24 +03001127
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001128#define PRINT_ATTRn(_n, _f, _p) \
1129do { \
1130 if (attr->_f) { \
1131 _p(attr->_f); \
1132 ret += attr__fprintf(fp, _n, buf, priv);\
1133 } \
1134} while (0)
1135
1136#define PRINT_ATTRf(_f, _p) PRINT_ATTRn(#_f, _f, _p)
1137
1138int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
1139 attr__fprintf_f attr__fprintf, void *priv)
1140{
1141 char buf[BUF_SIZE];
1142 int ret = 0;
1143
1144 PRINT_ATTRf(type, p_unsigned);
1145 PRINT_ATTRf(size, p_unsigned);
1146 PRINT_ATTRf(config, p_hex);
1147 PRINT_ATTRn("{ sample_period, sample_freq }", sample_period, p_unsigned);
1148 PRINT_ATTRf(sample_type, p_sample_type);
1149 PRINT_ATTRf(read_format, p_read_format);
1150
1151 PRINT_ATTRf(disabled, p_unsigned);
1152 PRINT_ATTRf(inherit, p_unsigned);
1153 PRINT_ATTRf(pinned, p_unsigned);
1154 PRINT_ATTRf(exclusive, p_unsigned);
1155 PRINT_ATTRf(exclude_user, p_unsigned);
1156 PRINT_ATTRf(exclude_kernel, p_unsigned);
1157 PRINT_ATTRf(exclude_hv, p_unsigned);
1158 PRINT_ATTRf(exclude_idle, p_unsigned);
1159 PRINT_ATTRf(mmap, p_unsigned);
1160 PRINT_ATTRf(comm, p_unsigned);
1161 PRINT_ATTRf(freq, p_unsigned);
1162 PRINT_ATTRf(inherit_stat, p_unsigned);
1163 PRINT_ATTRf(enable_on_exec, p_unsigned);
1164 PRINT_ATTRf(task, p_unsigned);
1165 PRINT_ATTRf(watermark, p_unsigned);
1166 PRINT_ATTRf(precise_ip, p_unsigned);
1167 PRINT_ATTRf(mmap_data, p_unsigned);
1168 PRINT_ATTRf(sample_id_all, p_unsigned);
1169 PRINT_ATTRf(exclude_host, p_unsigned);
1170 PRINT_ATTRf(exclude_guest, p_unsigned);
1171 PRINT_ATTRf(exclude_callchain_kernel, p_unsigned);
1172 PRINT_ATTRf(exclude_callchain_user, p_unsigned);
1173 PRINT_ATTRf(mmap2, p_unsigned);
1174 PRINT_ATTRf(comm_exec, p_unsigned);
1175 PRINT_ATTRf(use_clockid, p_unsigned);
Adrian Hunter02860392015-07-21 12:44:03 +03001176 PRINT_ATTRf(context_switch, p_unsigned);
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001177
1178 PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
1179 PRINT_ATTRf(bp_type, p_unsigned);
1180 PRINT_ATTRn("{ bp_addr, config1 }", bp_addr, p_hex);
1181 PRINT_ATTRn("{ bp_len, config2 }", bp_len, p_hex);
1182 PRINT_ATTRf(sample_regs_user, p_hex);
1183 PRINT_ATTRf(sample_stack_user, p_unsigned);
1184 PRINT_ATTRf(clockid, p_signed);
1185 PRINT_ATTRf(sample_regs_intr, p_hex);
Adrian Hunter70d73de2015-04-09 18:54:06 +03001186 PRINT_ATTRf(aux_watermark, p_unsigned);
Adrian Huntere3e1a542013-08-14 15:48:24 +03001187
1188 return ret;
1189}
1190
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001191static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1192 void *priv __attribute__((unused)))
1193{
1194 return fprintf(fp, " %-32s %s\n", name, val);
1195}
1196
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001197static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001198 struct thread_map *threads)
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -02001199{
Adrian Hunterbf8e8f42014-07-31 09:00:51 +03001200 int cpu, thread, nthreads;
Yann Droneaud57480d22014-06-30 22:28:47 +02001201 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -02001202 int pid = -1, err;
Andi Kleenbec19672013-08-04 19:41:26 -07001203 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -02001204
Adrian Hunterbf8e8f42014-07-31 09:00:51 +03001205 if (evsel->system_wide)
1206 nthreads = 1;
1207 else
1208 nthreads = threads->nr;
1209
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001210 if (evsel->fd == NULL &&
Adrian Hunterbf8e8f42014-07-31 09:00:51 +03001211 perf_evsel__alloc_fd(evsel, cpus->nr, nthreads) < 0)
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -02001212 return -ENOMEM;
Arnaldo Carvalho de Melo4eed11d2011-01-04 00:13:17 -02001213
Stephane Eranian023695d2011-02-14 11:20:01 +02001214 if (evsel->cgrp) {
Yann Droneaud57480d22014-06-30 22:28:47 +02001215 flags |= PERF_FLAG_PID_CGROUP;
Stephane Eranian023695d2011-02-14 11:20:01 +02001216 pid = evsel->cgrp->fd;
1217 }
1218
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -03001219fallback_missing_features:
Peter Zijlstra814c8c32015-03-31 00:19:31 +02001220 if (perf_missing_features.clockid_wrong)
1221 evsel->attr.clockid = CLOCK_MONOTONIC; /* should always work */
1222 if (perf_missing_features.clockid) {
1223 evsel->attr.use_clockid = 0;
1224 evsel->attr.clockid = 0;
1225 }
Yann Droneaud57480d22014-06-30 22:28:47 +02001226 if (perf_missing_features.cloexec)
1227 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001228 if (perf_missing_features.mmap2)
1229 evsel->attr.mmap2 = 0;
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -03001230 if (perf_missing_features.exclude_guest)
1231 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
1232retry_sample_id:
1233 if (perf_missing_features.sample_id_all)
1234 evsel->attr.sample_id_all = 0;
1235
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02001236 if (verbose >= 2) {
1237 fprintf(stderr, "%.60s\n", graph_dotted_line);
1238 fprintf(stderr, "perf_event_attr:\n");
1239 perf_event_attr__fprintf(stderr, &evsel->attr, __open_attr__fprintf, NULL);
1240 fprintf(stderr, "%.60s\n", graph_dotted_line);
1241 }
Adrian Huntere3e1a542013-08-14 15:48:24 +03001242
Arnaldo Carvalho de Melo86bd5e82011-01-03 23:09:46 -02001243 for (cpu = 0; cpu < cpus->nr; cpu++) {
Arnaldo Carvalho de Melo9d04f172011-01-12 00:08:18 -02001244
Adrian Hunterbf8e8f42014-07-31 09:00:51 +03001245 for (thread = 0; thread < nthreads; thread++) {
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001246 int group_fd;
Stephane Eranian023695d2011-02-14 11:20:01 +02001247
Adrian Hunterbf8e8f42014-07-31 09:00:51 +03001248 if (!evsel->cgrp && !evsel->system_wide)
Jiri Olsae13798c2015-06-23 00:36:02 +02001249 pid = thread_map__pid(threads, thread);
Stephane Eranian023695d2011-02-14 11:20:01 +02001250
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001251 group_fd = get_group_fd(evsel, cpu, thread);
Andi Kleenbec19672013-08-04 19:41:26 -07001252retry_open:
Ramkumar Ramachandraa33f6ef2014-03-18 15:10:42 -04001253 pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx\n",
Adrian Huntere3e1a542013-08-14 15:48:24 +03001254 pid, cpus->map[cpu], group_fd, flags);
1255
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001256 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
Stephane Eranian023695d2011-02-14 11:20:01 +02001257 pid,
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -02001258 cpus->map[cpu],
Stephane Eranian023695d2011-02-14 11:20:01 +02001259 group_fd, flags);
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -02001260 if (FD(evsel, cpu, thread) < 0) {
1261 err = -errno;
Ramkumar Ramachandraa33f6ef2014-03-18 15:10:42 -04001262 pr_debug2("sys_perf_event_open failed, error %d\n",
Adrian Hunterf852fd62013-11-01 15:51:29 +02001263 err);
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -03001264 goto try_fallback;
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -02001265 }
Andi Kleenbec19672013-08-04 19:41:26 -07001266 set_rlimit = NO_CHANGE;
Peter Zijlstra814c8c32015-03-31 00:19:31 +02001267
1268 /*
1269 * If we succeeded but had to kill clockid, fail and
1270 * have perf_evsel__open_strerror() print us a nice
1271 * error.
1272 */
1273 if (perf_missing_features.clockid ||
1274 perf_missing_features.clockid_wrong) {
1275 err = -EINVAL;
1276 goto out_close;
1277 }
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001278 }
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -02001279 }
1280
1281 return 0;
1282
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -03001283try_fallback:
Andi Kleenbec19672013-08-04 19:41:26 -07001284 /*
1285 * perf stat needs between 5 and 22 fds per CPU. When we run out
1286 * of them try to increase the limits.
1287 */
1288 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1289 struct rlimit l;
1290 int old_errno = errno;
1291
1292 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1293 if (set_rlimit == NO_CHANGE)
1294 l.rlim_cur = l.rlim_max;
1295 else {
1296 l.rlim_cur = l.rlim_max + 1000;
1297 l.rlim_max = l.rlim_cur;
1298 }
1299 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1300 set_rlimit++;
1301 errno = old_errno;
1302 goto retry_open;
1303 }
1304 }
1305 errno = old_errno;
1306 }
1307
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -03001308 if (err != -EINVAL || cpu > 0 || thread > 0)
1309 goto out_close;
1310
Peter Zijlstra814c8c32015-03-31 00:19:31 +02001311 /*
1312 * Must probe features in the order they were added to the
1313 * perf_event_attr interface.
1314 */
1315 if (!perf_missing_features.clockid_wrong && evsel->attr.use_clockid) {
1316 perf_missing_features.clockid_wrong = true;
1317 goto fallback_missing_features;
1318 } else if (!perf_missing_features.clockid && evsel->attr.use_clockid) {
1319 perf_missing_features.clockid = true;
1320 goto fallback_missing_features;
1321 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
Yann Droneaud57480d22014-06-30 22:28:47 +02001322 perf_missing_features.cloexec = true;
1323 goto fallback_missing_features;
1324 } else if (!perf_missing_features.mmap2 && evsel->attr.mmap2) {
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001325 perf_missing_features.mmap2 = true;
1326 goto fallback_missing_features;
1327 } else if (!perf_missing_features.exclude_guest &&
1328 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
Arnaldo Carvalho de Melo594ac612012-12-13 13:13:07 -03001329 perf_missing_features.exclude_guest = true;
1330 goto fallback_missing_features;
1331 } else if (!perf_missing_features.sample_id_all) {
1332 perf_missing_features.sample_id_all = true;
1333 goto retry_sample_id;
1334 }
1335
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -02001336out_close:
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001337 do {
1338 while (--thread >= 0) {
1339 close(FD(evsel, cpu, thread));
1340 FD(evsel, cpu, thread) = -1;
1341 }
Adrian Hunterbf8e8f42014-07-31 09:00:51 +03001342 thread = nthreads;
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001343 } while (--cpu >= 0);
Arnaldo Carvalho de Melo727ab042011-10-25 10:42:19 -02001344 return err;
1345}
1346
1347void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
1348{
1349 if (evsel->fd == NULL)
1350 return;
1351
1352 perf_evsel__close_fd(evsel, ncpus, nthreads);
1353 perf_evsel__free_fd(evsel);
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -02001354}
1355
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001356static struct {
1357 struct cpu_map map;
1358 int cpus[1];
1359} empty_cpu_map = {
1360 .map.nr = 1,
1361 .cpus = { -1, },
1362};
1363
1364static struct {
1365 struct thread_map map;
1366 int threads[1];
1367} empty_thread_map = {
1368 .map.nr = 1,
1369 .threads = { -1, },
1370};
1371
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -02001372int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001373 struct thread_map *threads)
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001374{
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001375 if (cpus == NULL) {
1376 /* Work around old compiler warnings about strict aliasing */
1377 cpus = &empty_cpu_map.map;
1378 }
1379
1380 if (threads == NULL)
1381 threads = &empty_thread_map.map;
1382
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001383 return __perf_evsel__open(evsel, cpus, threads);
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001384}
1385
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -02001386int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001387 struct cpu_map *cpus)
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001388{
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001389 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
Arnaldo Carvalho de Melo02522082011-01-04 11:55:27 -02001390}
1391
Arnaldo Carvalho de Melof08199d2011-01-11 23:42:19 -02001392int perf_evsel__open_per_thread(struct perf_evsel *evsel,
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001393 struct thread_map *threads)
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -02001394{
Jiri Olsa6a4bb042012-08-08 12:22:36 +02001395 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
Arnaldo Carvalho de Melo48290602011-01-03 17:48:12 -02001396}
Arnaldo Carvalho de Melo70082dd2011-01-12 17:03:24 -02001397
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001398static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
1399 const union perf_event *event,
1400 struct perf_sample *sample)
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001401{
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001402 u64 type = evsel->attr.sample_type;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001403 const u64 *array = event->sample.array;
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001404 bool swapped = evsel->needs_swap;
Jiri Olsa37073f92012-05-30 14:23:44 +02001405 union u64_swap u;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001406
1407 array += ((event->header.size -
1408 sizeof(event->header)) / sizeof(u64)) - 1;
1409
Adrian Hunter75562572013-08-27 11:23:09 +03001410 if (type & PERF_SAMPLE_IDENTIFIER) {
1411 sample->id = *array;
1412 array--;
1413 }
1414
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001415 if (type & PERF_SAMPLE_CPU) {
Jiri Olsa37073f92012-05-30 14:23:44 +02001416 u.val64 = *array;
1417 if (swapped) {
1418 /* undo swap of u64, then swap on individual u32s */
1419 u.val64 = bswap_64(u.val64);
1420 u.val32[0] = bswap_32(u.val32[0]);
1421 }
1422
1423 sample->cpu = u.val32[0];
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001424 array--;
1425 }
1426
1427 if (type & PERF_SAMPLE_STREAM_ID) {
1428 sample->stream_id = *array;
1429 array--;
1430 }
1431
1432 if (type & PERF_SAMPLE_ID) {
1433 sample->id = *array;
1434 array--;
1435 }
1436
1437 if (type & PERF_SAMPLE_TIME) {
1438 sample->time = *array;
1439 array--;
1440 }
1441
1442 if (type & PERF_SAMPLE_TID) {
Jiri Olsa37073f92012-05-30 14:23:44 +02001443 u.val64 = *array;
1444 if (swapped) {
1445 /* undo swap of u64, then swap on individual u32s */
1446 u.val64 = bswap_64(u.val64);
1447 u.val32[0] = bswap_32(u.val32[0]);
1448 u.val32[1] = bswap_32(u.val32[1]);
1449 }
1450
1451 sample->pid = u.val32[0];
1452 sample->tid = u.val32[1];
Adrian Hunterdd44bc62013-10-18 15:29:01 +03001453 array--;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001454 }
1455
1456 return 0;
1457}
1458
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001459static inline bool overflow(const void *endp, u16 max_size, const void *offset,
1460 u64 size)
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001461{
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001462 return size > max_size || offset + size > endp;
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001463}
1464
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001465#define OVERFLOW_CHECK(offset, size, max_size) \
1466 do { \
1467 if (overflow(endp, (max_size), (offset), (size))) \
1468 return -EFAULT; \
1469 } while (0)
1470
1471#define OVERFLOW_CHECK_u64(offset) \
1472 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
1473
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001474int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001475 struct perf_sample *data)
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001476{
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001477 u64 type = evsel->attr.sample_type;
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001478 bool swapped = evsel->needs_swap;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001479 const u64 *array;
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001480 u16 max_size = event->header.size;
1481 const void *endp = (void *)event + max_size;
1482 u64 sz;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001483
David Ahern936be502011-09-06 09:12:26 -06001484 /*
1485 * used for cross-endian analysis. See git commit 65014ab3
1486 * for why this goofiness is needed.
1487 */
Jiri Olsa6a11f922012-05-16 08:59:04 +02001488 union u64_swap u;
David Ahern936be502011-09-06 09:12:26 -06001489
Robert Richterf3bda2c2011-12-15 17:32:39 +01001490 memset(data, 0, sizeof(*data));
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001491 data->cpu = data->pid = data->tid = -1;
1492 data->stream_id = data->id = data->time = -1ULL;
Jiri Olsabc529082014-02-03 12:44:41 +01001493 data->period = evsel->attr.sample_period;
Andi Kleen05484292013-01-24 16:10:29 +01001494 data->weight = 0;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001495
1496 if (event->header.type != PERF_RECORD_SAMPLE) {
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001497 if (!evsel->attr.sample_id_all)
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001498 return 0;
Arnaldo Carvalho de Melo0807d2d2012-09-26 12:48:18 -03001499 return perf_evsel__parse_id_sample(evsel, event, data);
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001500 }
1501
1502 array = event->sample.array;
1503
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001504 /*
1505 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
1506 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
1507 * check the format does not go past the end of the event.
1508 */
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001509 if (evsel->sample_size + sizeof(event->header) > event->header.size)
Frederic Weisbeckera2854122011-05-21 19:33:04 +02001510 return -EFAULT;
1511
Adrian Hunter75562572013-08-27 11:23:09 +03001512 data->id = -1ULL;
1513 if (type & PERF_SAMPLE_IDENTIFIER) {
1514 data->id = *array;
1515 array++;
1516 }
1517
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001518 if (type & PERF_SAMPLE_IP) {
Adrian Hunteref893252013-08-27 11:23:06 +03001519 data->ip = *array;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001520 array++;
1521 }
1522
1523 if (type & PERF_SAMPLE_TID) {
David Ahern936be502011-09-06 09:12:26 -06001524 u.val64 = *array;
1525 if (swapped) {
1526 /* undo swap of u64, then swap on individual u32s */
1527 u.val64 = bswap_64(u.val64);
1528 u.val32[0] = bswap_32(u.val32[0]);
1529 u.val32[1] = bswap_32(u.val32[1]);
1530 }
1531
1532 data->pid = u.val32[0];
1533 data->tid = u.val32[1];
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001534 array++;
1535 }
1536
1537 if (type & PERF_SAMPLE_TIME) {
1538 data->time = *array;
1539 array++;
1540 }
1541
David Ahern7cec0922011-05-30 13:08:23 -06001542 data->addr = 0;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001543 if (type & PERF_SAMPLE_ADDR) {
1544 data->addr = *array;
1545 array++;
1546 }
1547
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001548 if (type & PERF_SAMPLE_ID) {
1549 data->id = *array;
1550 array++;
1551 }
1552
1553 if (type & PERF_SAMPLE_STREAM_ID) {
1554 data->stream_id = *array;
1555 array++;
1556 }
1557
1558 if (type & PERF_SAMPLE_CPU) {
David Ahern936be502011-09-06 09:12:26 -06001559
1560 u.val64 = *array;
1561 if (swapped) {
1562 /* undo swap of u64, then swap on individual u32s */
1563 u.val64 = bswap_64(u.val64);
1564 u.val32[0] = bswap_32(u.val32[0]);
1565 }
1566
1567 data->cpu = u.val32[0];
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001568 array++;
1569 }
1570
1571 if (type & PERF_SAMPLE_PERIOD) {
1572 data->period = *array;
1573 array++;
1574 }
1575
1576 if (type & PERF_SAMPLE_READ) {
Jiri Olsa9ede4732012-10-10 17:38:13 +02001577 u64 read_format = evsel->attr.read_format;
1578
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001579 OVERFLOW_CHECK_u64(array);
Jiri Olsa9ede4732012-10-10 17:38:13 +02001580 if (read_format & PERF_FORMAT_GROUP)
1581 data->read.group.nr = *array;
1582 else
1583 data->read.one.value = *array;
1584
1585 array++;
1586
1587 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001588 OVERFLOW_CHECK_u64(array);
Jiri Olsa9ede4732012-10-10 17:38:13 +02001589 data->read.time_enabled = *array;
1590 array++;
1591 }
1592
1593 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001594 OVERFLOW_CHECK_u64(array);
Jiri Olsa9ede4732012-10-10 17:38:13 +02001595 data->read.time_running = *array;
1596 array++;
1597 }
1598
1599 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1600 if (read_format & PERF_FORMAT_GROUP) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001601 const u64 max_group_nr = UINT64_MAX /
1602 sizeof(struct sample_read_value);
1603
1604 if (data->read.group.nr > max_group_nr)
1605 return -EFAULT;
1606 sz = data->read.group.nr *
1607 sizeof(struct sample_read_value);
1608 OVERFLOW_CHECK(array, sz, max_size);
1609 data->read.group.values =
1610 (struct sample_read_value *)array;
1611 array = (void *)array + sz;
Jiri Olsa9ede4732012-10-10 17:38:13 +02001612 } else {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001613 OVERFLOW_CHECK_u64(array);
Jiri Olsa9ede4732012-10-10 17:38:13 +02001614 data->read.one.id = *array;
1615 array++;
1616 }
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001617 }
1618
1619 if (type & PERF_SAMPLE_CALLCHAIN) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001620 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
1621
1622 OVERFLOW_CHECK_u64(array);
1623 data->callchain = (struct ip_callchain *)array++;
1624 if (data->callchain->nr > max_callchain_nr)
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001625 return -EFAULT;
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001626 sz = data->callchain->nr * sizeof(u64);
1627 OVERFLOW_CHECK(array, sz, max_size);
1628 array = (void *)array + sz;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001629 }
1630
1631 if (type & PERF_SAMPLE_RAW) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001632 OVERFLOW_CHECK_u64(array);
David Ahern936be502011-09-06 09:12:26 -06001633 u.val64 = *array;
1634 if (WARN_ONCE(swapped,
1635 "Endianness of raw data not corrected!\n")) {
1636 /* undo swap of u64, then swap on individual u32s */
1637 u.val64 = bswap_64(u.val64);
1638 u.val32[0] = bswap_32(u.val32[0]);
1639 u.val32[1] = bswap_32(u.val32[1]);
1640 }
David Ahern936be502011-09-06 09:12:26 -06001641 data->raw_size = u.val32[0];
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001642 array = (void *)array + sizeof(u32);
Frederic Weisbecker98e1da92011-05-21 20:08:15 +02001643
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001644 OVERFLOW_CHECK(array, data->raw_size, max_size);
1645 data->raw_data = (void *)array;
1646 array = (void *)array + data->raw_size;
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001647 }
1648
Roberto Agostino Vitillob5387522012-02-09 23:21:01 +01001649 if (type & PERF_SAMPLE_BRANCH_STACK) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001650 const u64 max_branch_nr = UINT64_MAX /
1651 sizeof(struct branch_entry);
Roberto Agostino Vitillob5387522012-02-09 23:21:01 +01001652
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001653 OVERFLOW_CHECK_u64(array);
1654 data->branch_stack = (struct branch_stack *)array++;
Roberto Agostino Vitillob5387522012-02-09 23:21:01 +01001655
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001656 if (data->branch_stack->nr > max_branch_nr)
1657 return -EFAULT;
Roberto Agostino Vitillob5387522012-02-09 23:21:01 +01001658 sz = data->branch_stack->nr * sizeof(struct branch_entry);
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001659 OVERFLOW_CHECK(array, sz, max_size);
1660 array = (void *)array + sz;
Roberto Agostino Vitillob5387522012-02-09 23:21:01 +01001661 }
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001662
1663 if (type & PERF_SAMPLE_REGS_USER) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001664 OVERFLOW_CHECK_u64(array);
Adrian Hunter5b95a4a32013-08-27 11:23:10 +03001665 data->user_regs.abi = *array;
1666 array++;
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001667
Adrian Hunter5b95a4a32013-08-27 11:23:10 +03001668 if (data->user_regs.abi) {
Jiri Olsa352ea452014-01-07 13:47:25 +01001669 u64 mask = evsel->attr.sample_regs_user;
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001670
Jiri Olsa352ea452014-01-07 13:47:25 +01001671 sz = hweight_long(mask) * sizeof(u64);
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001672 OVERFLOW_CHECK(array, sz, max_size);
Jiri Olsa352ea452014-01-07 13:47:25 +01001673 data->user_regs.mask = mask;
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001674 data->user_regs.regs = (u64 *)array;
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001675 array = (void *)array + sz;
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001676 }
1677 }
1678
1679 if (type & PERF_SAMPLE_STACK_USER) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001680 OVERFLOW_CHECK_u64(array);
1681 sz = *array++;
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001682
1683 data->user_stack.offset = ((char *)(array - 1)
1684 - (char *) event);
1685
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001686 if (!sz) {
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001687 data->user_stack.size = 0;
1688 } else {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001689 OVERFLOW_CHECK(array, sz, max_size);
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001690 data->user_stack.data = (char *)array;
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001691 array = (void *)array + sz;
1692 OVERFLOW_CHECK_u64(array);
Adrian Hunter54bd2692013-07-04 16:20:34 +03001693 data->user_stack.size = *array++;
Jiri Olsaa65cb4b2013-10-02 15:46:39 +02001694 if (WARN_ONCE(data->user_stack.size > sz,
1695 "user stack dump failure\n"))
1696 return -EFAULT;
Jiri Olsa0f6a3012012-08-07 15:20:45 +02001697 }
1698 }
1699
Andi Kleen05484292013-01-24 16:10:29 +01001700 data->weight = 0;
1701 if (type & PERF_SAMPLE_WEIGHT) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001702 OVERFLOW_CHECK_u64(array);
Andi Kleen05484292013-01-24 16:10:29 +01001703 data->weight = *array;
1704 array++;
1705 }
1706
Stephane Eranian98a3b322013-01-24 16:10:35 +01001707 data->data_src = PERF_MEM_DATA_SRC_NONE;
1708 if (type & PERF_SAMPLE_DATA_SRC) {
Adrian Hunter03b6ea92013-08-27 11:23:04 +03001709 OVERFLOW_CHECK_u64(array);
Stephane Eranian98a3b322013-01-24 16:10:35 +01001710 data->data_src = *array;
1711 array++;
1712 }
1713
Andi Kleen475eeab2013-09-20 07:40:43 -07001714 data->transaction = 0;
1715 if (type & PERF_SAMPLE_TRANSACTION) {
Adrian Hunter87b95522013-11-01 15:51:36 +02001716 OVERFLOW_CHECK_u64(array);
Andi Kleen475eeab2013-09-20 07:40:43 -07001717 data->transaction = *array;
1718 array++;
1719 }
1720
Stephane Eranian6a21c0b2014-09-24 13:48:39 +02001721 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
1722 if (type & PERF_SAMPLE_REGS_INTR) {
1723 OVERFLOW_CHECK_u64(array);
1724 data->intr_regs.abi = *array;
1725 array++;
1726
1727 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
1728 u64 mask = evsel->attr.sample_regs_intr;
1729
1730 sz = hweight_long(mask) * sizeof(u64);
1731 OVERFLOW_CHECK(array, sz, max_size);
1732 data->intr_regs.mask = mask;
1733 data->intr_regs.regs = (u64 *)array;
1734 array = (void *)array + sz;
1735 }
1736 }
1737
Arnaldo Carvalho de Melod0dd74e2011-01-21 13:46:41 -02001738 return 0;
1739}
Andrew Vagin74eec262011-11-28 12:03:31 +03001740
Adrian Hunterb1cf6f62013-08-27 11:23:12 +03001741size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
Jiri Olsa352ea452014-01-07 13:47:25 +01001742 u64 read_format)
Adrian Hunterb1cf6f62013-08-27 11:23:12 +03001743{
1744 size_t sz, result = sizeof(struct sample_event);
1745
1746 if (type & PERF_SAMPLE_IDENTIFIER)
1747 result += sizeof(u64);
1748
1749 if (type & PERF_SAMPLE_IP)
1750 result += sizeof(u64);
1751
1752 if (type & PERF_SAMPLE_TID)
1753 result += sizeof(u64);
1754
1755 if (type & PERF_SAMPLE_TIME)
1756 result += sizeof(u64);
1757
1758 if (type & PERF_SAMPLE_ADDR)
1759 result += sizeof(u64);
1760
1761 if (type & PERF_SAMPLE_ID)
1762 result += sizeof(u64);
1763
1764 if (type & PERF_SAMPLE_STREAM_ID)
1765 result += sizeof(u64);
1766
1767 if (type & PERF_SAMPLE_CPU)
1768 result += sizeof(u64);
1769
1770 if (type & PERF_SAMPLE_PERIOD)
1771 result += sizeof(u64);
1772
1773 if (type & PERF_SAMPLE_READ) {
1774 result += sizeof(u64);
1775 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1776 result += sizeof(u64);
1777 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1778 result += sizeof(u64);
1779 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1780 if (read_format & PERF_FORMAT_GROUP) {
1781 sz = sample->read.group.nr *
1782 sizeof(struct sample_read_value);
1783 result += sz;
1784 } else {
1785 result += sizeof(u64);
1786 }
1787 }
1788
1789 if (type & PERF_SAMPLE_CALLCHAIN) {
1790 sz = (sample->callchain->nr + 1) * sizeof(u64);
1791 result += sz;
1792 }
1793
1794 if (type & PERF_SAMPLE_RAW) {
1795 result += sizeof(u32);
1796 result += sample->raw_size;
1797 }
1798
1799 if (type & PERF_SAMPLE_BRANCH_STACK) {
1800 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1801 sz += sizeof(u64);
1802 result += sz;
1803 }
1804
1805 if (type & PERF_SAMPLE_REGS_USER) {
1806 if (sample->user_regs.abi) {
1807 result += sizeof(u64);
Jiri Olsa352ea452014-01-07 13:47:25 +01001808 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
Adrian Hunterb1cf6f62013-08-27 11:23:12 +03001809 result += sz;
1810 } else {
1811 result += sizeof(u64);
1812 }
1813 }
1814
1815 if (type & PERF_SAMPLE_STACK_USER) {
1816 sz = sample->user_stack.size;
1817 result += sizeof(u64);
1818 if (sz) {
1819 result += sz;
1820 result += sizeof(u64);
1821 }
1822 }
1823
1824 if (type & PERF_SAMPLE_WEIGHT)
1825 result += sizeof(u64);
1826
1827 if (type & PERF_SAMPLE_DATA_SRC)
1828 result += sizeof(u64);
1829
Adrian Hunter42d88912013-11-01 15:51:38 +02001830 if (type & PERF_SAMPLE_TRANSACTION)
1831 result += sizeof(u64);
1832
Stephane Eranian6a21c0b2014-09-24 13:48:39 +02001833 if (type & PERF_SAMPLE_REGS_INTR) {
1834 if (sample->intr_regs.abi) {
1835 result += sizeof(u64);
1836 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
1837 result += sz;
1838 } else {
1839 result += sizeof(u64);
1840 }
1841 }
1842
Adrian Hunterb1cf6f62013-08-27 11:23:12 +03001843 return result;
1844}
1845
Andrew Vagin74eec262011-11-28 12:03:31 +03001846int perf_event__synthesize_sample(union perf_event *event, u64 type,
Jiri Olsa352ea452014-01-07 13:47:25 +01001847 u64 read_format,
Andrew Vagin74eec262011-11-28 12:03:31 +03001848 const struct perf_sample *sample,
1849 bool swapped)
1850{
1851 u64 *array;
Adrian Hunterd03f2172013-08-27 11:23:11 +03001852 size_t sz;
Andrew Vagin74eec262011-11-28 12:03:31 +03001853 /*
1854 * used for cross-endian analysis. See git commit 65014ab3
1855 * for why this goofiness is needed.
1856 */
Jiri Olsa6a11f922012-05-16 08:59:04 +02001857 union u64_swap u;
Andrew Vagin74eec262011-11-28 12:03:31 +03001858
1859 array = event->sample.array;
1860
Adrian Hunter75562572013-08-27 11:23:09 +03001861 if (type & PERF_SAMPLE_IDENTIFIER) {
1862 *array = sample->id;
1863 array++;
1864 }
1865
Andrew Vagin74eec262011-11-28 12:03:31 +03001866 if (type & PERF_SAMPLE_IP) {
Adrian Hunteref893252013-08-27 11:23:06 +03001867 *array = sample->ip;
Andrew Vagin74eec262011-11-28 12:03:31 +03001868 array++;
1869 }
1870
1871 if (type & PERF_SAMPLE_TID) {
1872 u.val32[0] = sample->pid;
1873 u.val32[1] = sample->tid;
1874 if (swapped) {
1875 /*
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001876 * Inverse of what is done in perf_evsel__parse_sample
Andrew Vagin74eec262011-11-28 12:03:31 +03001877 */
1878 u.val32[0] = bswap_32(u.val32[0]);
1879 u.val32[1] = bswap_32(u.val32[1]);
1880 u.val64 = bswap_64(u.val64);
1881 }
1882
1883 *array = u.val64;
1884 array++;
1885 }
1886
1887 if (type & PERF_SAMPLE_TIME) {
1888 *array = sample->time;
1889 array++;
1890 }
1891
1892 if (type & PERF_SAMPLE_ADDR) {
1893 *array = sample->addr;
1894 array++;
1895 }
1896
1897 if (type & PERF_SAMPLE_ID) {
1898 *array = sample->id;
1899 array++;
1900 }
1901
1902 if (type & PERF_SAMPLE_STREAM_ID) {
1903 *array = sample->stream_id;
1904 array++;
1905 }
1906
1907 if (type & PERF_SAMPLE_CPU) {
1908 u.val32[0] = sample->cpu;
1909 if (swapped) {
1910 /*
Arnaldo Carvalho de Meloa3f698f2012-08-02 12:23:46 -03001911 * Inverse of what is done in perf_evsel__parse_sample
Andrew Vagin74eec262011-11-28 12:03:31 +03001912 */
1913 u.val32[0] = bswap_32(u.val32[0]);
1914 u.val64 = bswap_64(u.val64);
1915 }
1916 *array = u.val64;
1917 array++;
1918 }
1919
1920 if (type & PERF_SAMPLE_PERIOD) {
1921 *array = sample->period;
1922 array++;
1923 }
1924
Adrian Hunterd03f2172013-08-27 11:23:11 +03001925 if (type & PERF_SAMPLE_READ) {
1926 if (read_format & PERF_FORMAT_GROUP)
1927 *array = sample->read.group.nr;
1928 else
1929 *array = sample->read.one.value;
1930 array++;
1931
1932 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
1933 *array = sample->read.time_enabled;
1934 array++;
1935 }
1936
1937 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
1938 *array = sample->read.time_running;
1939 array++;
1940 }
1941
1942 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
1943 if (read_format & PERF_FORMAT_GROUP) {
1944 sz = sample->read.group.nr *
1945 sizeof(struct sample_read_value);
1946 memcpy(array, sample->read.group.values, sz);
1947 array = (void *)array + sz;
1948 } else {
1949 *array = sample->read.one.id;
1950 array++;
1951 }
1952 }
1953
1954 if (type & PERF_SAMPLE_CALLCHAIN) {
1955 sz = (sample->callchain->nr + 1) * sizeof(u64);
1956 memcpy(array, sample->callchain, sz);
1957 array = (void *)array + sz;
1958 }
1959
1960 if (type & PERF_SAMPLE_RAW) {
1961 u.val32[0] = sample->raw_size;
1962 if (WARN_ONCE(swapped,
1963 "Endianness of raw data not corrected!\n")) {
1964 /*
1965 * Inverse of what is done in perf_evsel__parse_sample
1966 */
1967 u.val32[0] = bswap_32(u.val32[0]);
1968 u.val32[1] = bswap_32(u.val32[1]);
1969 u.val64 = bswap_64(u.val64);
1970 }
1971 *array = u.val64;
1972 array = (void *)array + sizeof(u32);
1973
1974 memcpy(array, sample->raw_data, sample->raw_size);
1975 array = (void *)array + sample->raw_size;
1976 }
1977
1978 if (type & PERF_SAMPLE_BRANCH_STACK) {
1979 sz = sample->branch_stack->nr * sizeof(struct branch_entry);
1980 sz += sizeof(u64);
1981 memcpy(array, sample->branch_stack, sz);
1982 array = (void *)array + sz;
1983 }
1984
1985 if (type & PERF_SAMPLE_REGS_USER) {
1986 if (sample->user_regs.abi) {
1987 *array++ = sample->user_regs.abi;
Jiri Olsa352ea452014-01-07 13:47:25 +01001988 sz = hweight_long(sample->user_regs.mask) * sizeof(u64);
Adrian Hunterd03f2172013-08-27 11:23:11 +03001989 memcpy(array, sample->user_regs.regs, sz);
1990 array = (void *)array + sz;
1991 } else {
1992 *array++ = 0;
1993 }
1994 }
1995
1996 if (type & PERF_SAMPLE_STACK_USER) {
1997 sz = sample->user_stack.size;
1998 *array++ = sz;
1999 if (sz) {
2000 memcpy(array, sample->user_stack.data, sz);
2001 array = (void *)array + sz;
2002 *array++ = sz;
2003 }
2004 }
2005
2006 if (type & PERF_SAMPLE_WEIGHT) {
2007 *array = sample->weight;
2008 array++;
2009 }
2010
2011 if (type & PERF_SAMPLE_DATA_SRC) {
2012 *array = sample->data_src;
2013 array++;
2014 }
2015
Adrian Hunter42d88912013-11-01 15:51:38 +02002016 if (type & PERF_SAMPLE_TRANSACTION) {
2017 *array = sample->transaction;
2018 array++;
2019 }
2020
Stephane Eranian6a21c0b2014-09-24 13:48:39 +02002021 if (type & PERF_SAMPLE_REGS_INTR) {
2022 if (sample->intr_regs.abi) {
2023 *array++ = sample->intr_regs.abi;
2024 sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
2025 memcpy(array, sample->intr_regs.regs, sz);
2026 array = (void *)array + sz;
2027 } else {
2028 *array++ = 0;
2029 }
2030 }
2031
Andrew Vagin74eec262011-11-28 12:03:31 +03002032 return 0;
2033}
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002034
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03002035struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
2036{
2037 return pevent_find_field(evsel->tp_format, name);
2038}
2039
Arnaldo Carvalho de Melo5d2074e2012-09-26 20:22:00 -03002040void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002041 const char *name)
2042{
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03002043 struct format_field *field = perf_evsel__field(evsel, name);
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002044 int offset;
2045
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03002046 if (!field)
2047 return NULL;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002048
2049 offset = field->offset;
2050
2051 if (field->flags & FIELD_IS_DYNAMIC) {
2052 offset = *(int *)(sample->raw_data + field->offset);
2053 offset &= 0xffff;
2054 }
2055
2056 return sample->raw_data + offset;
2057}
2058
2059u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
2060 const char *name)
2061{
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03002062 struct format_field *field = perf_evsel__field(evsel, name);
Arnaldo Carvalho de Meloe6b6f672012-09-26 13:13:04 -03002063 void *ptr;
2064 u64 value;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002065
Arnaldo Carvalho de Meloefd2b922012-09-18 11:21:50 -03002066 if (!field)
2067 return 0;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002068
Arnaldo Carvalho de Meloe6b6f672012-09-26 13:13:04 -03002069 ptr = sample->raw_data + field->offset;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002070
Arnaldo Carvalho de Meloe6b6f672012-09-26 13:13:04 -03002071 switch (field->size) {
2072 case 1:
2073 return *(u8 *)ptr;
2074 case 2:
2075 value = *(u16 *)ptr;
2076 break;
2077 case 4:
2078 value = *(u32 *)ptr;
2079 break;
2080 case 8:
David Aherne94eeda2015-03-24 16:14:09 -04002081 memcpy(&value, ptr, sizeof(u64));
Arnaldo Carvalho de Meloe6b6f672012-09-26 13:13:04 -03002082 break;
2083 default:
2084 return 0;
2085 }
2086
2087 if (!evsel->needs_swap)
2088 return value;
2089
2090 switch (field->size) {
2091 case 2:
2092 return bswap_16(value);
2093 case 4:
2094 return bswap_32(value);
2095 case 8:
2096 return bswap_64(value);
2097 default:
2098 return 0;
2099 }
2100
2101 return 0;
Arnaldo Carvalho de Melo5555ded2012-09-11 19:24:23 -03002102}
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03002103
2104static int comma_fprintf(FILE *fp, bool *first, const char *fmt, ...)
2105{
2106 va_list args;
2107 int ret = 0;
2108
2109 if (!*first) {
2110 ret += fprintf(fp, ",");
2111 } else {
2112 ret += fprintf(fp, ":");
2113 *first = false;
2114 }
2115
2116 va_start(args, fmt);
2117 ret += vfprintf(fp, fmt, args);
2118 va_end(args);
2119 return ret;
2120}
2121
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02002122static int __print_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv)
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03002123{
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02002124 return comma_fprintf(fp, (bool *)priv, " %s: %s", name, val);
Arnaldo Carvalho de Meloc79a4392012-12-11 10:54:12 -03002125}
2126
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03002127int perf_evsel__fprintf(struct perf_evsel *evsel,
2128 struct perf_attr_details *details, FILE *fp)
2129{
2130 bool first = true;
Namhyung Kime6ab07d2013-01-22 18:09:47 +09002131 int printed = 0;
2132
Arnaldo Carvalho de Meloe35ef3552013-02-06 17:20:02 -03002133 if (details->event_group) {
Namhyung Kime6ab07d2013-01-22 18:09:47 +09002134 struct perf_evsel *pos;
2135
2136 if (!perf_evsel__is_group_leader(evsel))
2137 return 0;
2138
2139 if (evsel->nr_members > 1)
2140 printed += fprintf(fp, "%s{", evsel->group_name ?: "");
2141
2142 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
2143 for_each_group_member(pos, evsel)
2144 printed += fprintf(fp, ",%s", perf_evsel__name(pos));
2145
2146 if (evsel->nr_members > 1)
2147 printed += fprintf(fp, "}");
2148 goto out;
2149 }
2150
2151 printed += fprintf(fp, "%s", perf_evsel__name(evsel));
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03002152
Peter Zijlstra2c5e8c52015-04-07 11:09:54 +02002153 if (details->verbose) {
2154 printed += perf_event_attr__fprintf(fp, &evsel->attr,
2155 __print_attr__fprintf, &first);
2156 } else if (details->freq) {
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03002157 printed += comma_fprintf(fp, &first, " sample_freq=%" PRIu64,
2158 (u64)evsel->attr.sample_freq);
2159 }
Namhyung Kime6ab07d2013-01-22 18:09:47 +09002160out:
Arnaldo Carvalho de Melo0698aed2012-12-10 18:17:08 -03002161 fputc('\n', fp);
2162 return ++printed;
2163}
Arnaldo Carvalho de Meloc0a54342012-12-13 14:16:30 -03002164
2165bool perf_evsel__fallback(struct perf_evsel *evsel, int err,
2166 char *msg, size_t msgsize)
2167{
David Ahern2b821cc2013-07-18 17:27:59 -06002168 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
Arnaldo Carvalho de Meloc0a54342012-12-13 14:16:30 -03002169 evsel->attr.type == PERF_TYPE_HARDWARE &&
2170 evsel->attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2171 /*
2172 * If it's cycles then fall back to hrtimer based
2173 * cpu-clock-tick sw counter, which is always available even if
2174 * no PMU support.
2175 *
2176 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2177 * b0a873e).
2178 */
2179 scnprintf(msg, msgsize, "%s",
2180"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2181
2182 evsel->attr.type = PERF_TYPE_SOFTWARE;
2183 evsel->attr.config = PERF_COUNT_SW_CPU_CLOCK;
2184
Arnaldo Carvalho de Melo04662522013-12-26 17:41:15 -03002185 zfree(&evsel->name);
Arnaldo Carvalho de Meloc0a54342012-12-13 14:16:30 -03002186 return true;
2187 }
2188
2189 return false;
2190}
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002191
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -03002192int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002193 int err, char *msg, size_t size)
2194{
Masami Hiramatsu6e81c742014-08-14 02:22:36 +00002195 char sbuf[STRERR_BUFSIZE];
2196
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002197 switch (err) {
2198 case EPERM:
2199 case EACCES:
David Ahernb69e63a2013-05-25 17:54:00 -06002200 return scnprintf(msg, size,
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002201 "You may not have permission to collect %sstats.\n"
2202 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
2203 " -1 - Not paranoid at all\n"
2204 " 0 - Disallow raw tracepoint access for unpriv\n"
2205 " 1 - Disallow cpu events for unpriv\n"
2206 " 2 - Disallow kernel profiling for unpriv",
2207 target->system_wide ? "system-wide " : "");
2208 case ENOENT:
2209 return scnprintf(msg, size, "The %s event is not supported.",
2210 perf_evsel__name(evsel));
2211 case EMFILE:
2212 return scnprintf(msg, size, "%s",
2213 "Too many events are opened.\n"
Jiri Olsa18ffdfe2015-05-25 22:51:54 +02002214 "Probably the maximum number of open file descriptors has been reached.\n"
2215 "Hint: Try again after reducing the number of events.\n"
2216 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002217 case ENODEV:
2218 if (target->cpu_list)
2219 return scnprintf(msg, size, "%s",
2220 "No such device - did you specify an out-of-range profile CPU?\n");
2221 break;
2222 case EOPNOTSUPP:
2223 if (evsel->attr.precise_ip)
2224 return scnprintf(msg, size, "%s",
2225 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2226#if defined(__i386__) || defined(__x86_64__)
2227 if (evsel->attr.type == PERF_TYPE_HARDWARE)
2228 return scnprintf(msg, size, "%s",
2229 "No hardware sampling interrupt available.\n"
2230 "No APIC? If so then you can boot the kernel with the \"lapic\" boot parameter to force-enable it.");
2231#endif
2232 break;
Jiri Olsa63914ac2014-08-01 17:46:54 +02002233 case EBUSY:
2234 if (find_process("oprofiled"))
2235 return scnprintf(msg, size,
2236 "The PMU counters are busy/taken by another profiler.\n"
2237 "We found oprofile daemon running, please stop it and try again.");
2238 break;
Peter Zijlstra814c8c32015-03-31 00:19:31 +02002239 case EINVAL:
2240 if (perf_missing_features.clockid)
2241 return scnprintf(msg, size, "clockid feature not supported.");
2242 if (perf_missing_features.clockid_wrong)
2243 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2244 break;
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002245 default:
2246 break;
2247 }
2248
2249 return scnprintf(msg, size,
Masami Hiramatsu6e81c742014-08-14 02:22:36 +00002250 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002251 "/bin/dmesg may provide additional information.\n"
2252 "No CONFIG_PERF_EVENTS=y kernel support configured?\n",
Masami Hiramatsu6e81c742014-08-14 02:22:36 +00002253 err, strerror_r(err, sbuf, sizeof(sbuf)),
2254 perf_evsel__name(evsel));
Arnaldo Carvalho de Melo56e52e82012-12-13 15:10:58 -03002255}