Commit | Line | Data |
---|---|---|
b8f46c5a XG |
1 | #define _FILE_OFFSET_BITS 64 |
2 | ||
94c744b6 ACM |
3 | #include <linux/kernel.h> |
4 | ||
ba21594c | 5 | #include <byteswap.h> |
94c744b6 ACM |
6 | #include <unistd.h> |
7 | #include <sys/types.h> | |
a41794cd | 8 | #include <sys/mman.h> |
94c744b6 | 9 | |
e248de33 ACM |
10 | #include "evlist.h" |
11 | #include "evsel.h" | |
94c744b6 | 12 | #include "session.h" |
45694aa7 | 13 | #include "tool.h" |
a328626b | 14 | #include "sort.h" |
94c744b6 | 15 | #include "util.h" |
5d67be97 | 16 | #include "cpumap.h" |
da378962 | 17 | #include "event-parse.h" |
0f6a3015 | 18 | #include "perf_regs.h" |
7dbf4dcf | 19 | #include "vdso.h" |
94c744b6 ACM |
20 | |
21 | static int perf_session__open(struct perf_session *self, bool force) | |
22 | { | |
23 | struct stat input_stat; | |
24 | ||
8dc58101 TZ |
25 | if (!strcmp(self->filename, "-")) { |
26 | self->fd_pipe = true; | |
27 | self->fd = STDIN_FILENO; | |
28 | ||
a91e5431 | 29 | if (perf_session__read_header(self, self->fd) < 0) |
69996df4 | 30 | pr_err("incompatible file format (rerun with -v to learn more)"); |
8dc58101 TZ |
31 | |
32 | return 0; | |
33 | } | |
34 | ||
f887f301 | 35 | self->fd = open(self->filename, O_RDONLY); |
94c744b6 | 36 | if (self->fd < 0) { |
0f2c3de2 AI |
37 | int err = errno; |
38 | ||
39 | pr_err("failed to open %s: %s", self->filename, strerror(err)); | |
40 | if (err == ENOENT && !strcmp(self->filename, "perf.data")) | |
94c744b6 ACM |
41 | pr_err(" (try 'perf record' first)"); |
42 | pr_err("\n"); | |
43 | return -errno; | |
44 | } | |
45 | ||
46 | if (fstat(self->fd, &input_stat) < 0) | |
47 | goto out_close; | |
48 | ||
49 | if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { | |
50 | pr_err("file %s not owned by current user or root\n", | |
51 | self->filename); | |
52 | goto out_close; | |
53 | } | |
54 | ||
55 | if (!input_stat.st_size) { | |
56 | pr_info("zero-sized file (%s), nothing to do!\n", | |
57 | self->filename); | |
58 | goto out_close; | |
59 | } | |
60 | ||
a91e5431 | 61 | if (perf_session__read_header(self, self->fd) < 0) { |
69996df4 | 62 | pr_err("incompatible file format (rerun with -v to learn more)"); |
94c744b6 ACM |
63 | goto out_close; |
64 | } | |
65 | ||
c2a70653 ACM |
66 | if (!perf_evlist__valid_sample_type(self->evlist)) { |
67 | pr_err("non matching sample_type"); | |
68 | goto out_close; | |
69 | } | |
70 | ||
71 | if (!perf_evlist__valid_sample_id_all(self->evlist)) { | |
72 | pr_err("non matching sample_id_all"); | |
73 | goto out_close; | |
74 | } | |
75 | ||
94c744b6 ACM |
76 | self->size = input_stat.st_size; |
77 | return 0; | |
78 | ||
79 | out_close: | |
80 | close(self->fd); | |
81 | self->fd = -1; | |
82 | return -1; | |
83 | } | |
84 | ||
7b56cce2 | 85 | void perf_session__set_id_hdr_size(struct perf_session *session) |
9c90a61c | 86 | { |
7b56cce2 ACM |
87 | u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); |
88 | ||
7b56cce2 | 89 | machines__set_id_hdr_size(&session->machines, id_hdr_size); |
9c90a61c ACM |
90 | } |
91 | ||
a1645ce1 ZY |
92 | int perf_session__create_kernel_maps(struct perf_session *self) |
93 | { | |
876650e6 | 94 | int ret = machine__create_kernel_maps(&self->machines.host); |
a1645ce1 | 95 | |
a1645ce1 | 96 | if (ret >= 0) |
d118f8ba | 97 | ret = machines__create_guest_kernel_maps(&self->machines); |
a1645ce1 ZY |
98 | return ret; |
99 | } | |
100 | ||
076c6e45 ACM |
101 | static void perf_session__destroy_kernel_maps(struct perf_session *self) |
102 | { | |
876650e6 | 103 | machines__destroy_kernel_maps(&self->machines); |
076c6e45 ACM |
104 | } |
105 | ||
21ef97f0 IM |
106 | struct perf_session *perf_session__new(const char *filename, int mode, |
107 | bool force, bool repipe, | |
45694aa7 | 108 | struct perf_tool *tool) |
94c744b6 | 109 | { |
efad1415 RR |
110 | struct perf_session *self; |
111 | struct stat st; | |
112 | size_t len; | |
113 | ||
114 | if (!filename || !strlen(filename)) { | |
115 | if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) | |
116 | filename = "-"; | |
117 | else | |
118 | filename = "perf.data"; | |
119 | } | |
120 | ||
121 | len = strlen(filename); | |
122 | self = zalloc(sizeof(*self) + len); | |
94c744b6 ACM |
123 | |
124 | if (self == NULL) | |
125 | goto out; | |
126 | ||
94c744b6 | 127 | memcpy(self->filename, filename, len); |
454c407e | 128 | self->repipe = repipe; |
a1225dec | 129 | INIT_LIST_HEAD(&self->ordered_samples.samples); |
020bb75a | 130 | INIT_LIST_HEAD(&self->ordered_samples.sample_cache); |
5c891f38 | 131 | INIT_LIST_HEAD(&self->ordered_samples.to_free); |
876650e6 | 132 | machines__init(&self->machines); |
94c744b6 | 133 | |
64abebf7 ACM |
134 | if (mode == O_RDONLY) { |
135 | if (perf_session__open(self, force) < 0) | |
136 | goto out_delete; | |
7b56cce2 | 137 | perf_session__set_id_hdr_size(self); |
64abebf7 ACM |
138 | } else if (mode == O_WRONLY) { |
139 | /* | |
140 | * In O_RDONLY mode this will be performed when reading the | |
8115d60c | 141 | * kernel MMAP event, in perf_event__process_mmap(). |
64abebf7 ACM |
142 | */ |
143 | if (perf_session__create_kernel_maps(self) < 0) | |
144 | goto out_delete; | |
145 | } | |
d549c769 | 146 | |
45694aa7 | 147 | if (tool && tool->ordering_requires_timestamps && |
5e562474 | 148 | tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) { |
21ef97f0 | 149 | dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); |
45694aa7 | 150 | tool->ordered_samples = false; |
21ef97f0 IM |
151 | } |
152 | ||
94c744b6 ACM |
153 | out: |
154 | return self; | |
4aa65636 ACM |
155 | out_delete: |
156 | perf_session__delete(self); | |
157 | return NULL; | |
94c744b6 ACM |
158 | } |
159 | ||
b424eba2 ACM |
160 | static void perf_session__delete_dead_threads(struct perf_session *session) |
161 | { | |
876650e6 | 162 | machine__delete_dead_threads(&session->machines.host); |
b424eba2 ACM |
163 | } |
164 | ||
b424eba2 ACM |
165 | static void perf_session__delete_threads(struct perf_session *session) |
166 | { | |
876650e6 | 167 | machine__delete_threads(&session->machines.host); |
b424eba2 ACM |
168 | } |
169 | ||
03cd2094 NK |
170 | static void perf_session_env__delete(struct perf_session_env *env) |
171 | { | |
172 | free(env->hostname); | |
173 | free(env->os_release); | |
174 | free(env->version); | |
175 | free(env->arch); | |
176 | free(env->cpu_desc); | |
177 | free(env->cpuid); | |
178 | ||
179 | free(env->cmdline); | |
180 | free(env->sibling_cores); | |
181 | free(env->sibling_threads); | |
182 | free(env->numa_nodes); | |
183 | free(env->pmu_mappings); | |
184 | } | |
185 | ||
94c744b6 ACM |
186 | void perf_session__delete(struct perf_session *self) |
187 | { | |
076c6e45 | 188 | perf_session__destroy_kernel_maps(self); |
d65a458b ACM |
189 | perf_session__delete_dead_threads(self); |
190 | perf_session__delete_threads(self); | |
03cd2094 | 191 | perf_session_env__delete(&self->header.env); |
876650e6 | 192 | machines__exit(&self->machines); |
94c744b6 ACM |
193 | close(self->fd); |
194 | free(self); | |
7dbf4dcf | 195 | vdso__exit(); |
94c744b6 | 196 | } |
a328626b | 197 | |
1d037ca1 IT |
198 | static int process_event_synth_tracing_data_stub(union perf_event *event |
199 | __maybe_unused, | |
200 | struct perf_session *session | |
201 | __maybe_unused) | |
d20deb64 ACM |
202 | { |
203 | dump_printf(": unhandled!\n"); | |
204 | return 0; | |
205 | } | |
206 | ||
1d037ca1 IT |
207 | static int process_event_synth_attr_stub(union perf_event *event __maybe_unused, |
208 | struct perf_evlist **pevlist | |
209 | __maybe_unused) | |
10d0f086 ACM |
210 | { |
211 | dump_printf(": unhandled!\n"); | |
212 | return 0; | |
213 | } | |
214 | ||
1d037ca1 IT |
215 | static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, |
216 | union perf_event *event __maybe_unused, | |
217 | struct perf_sample *sample __maybe_unused, | |
218 | struct perf_evsel *evsel __maybe_unused, | |
219 | struct machine *machine __maybe_unused) | |
9e69c210 ACM |
220 | { |
221 | dump_printf(": unhandled!\n"); | |
222 | return 0; | |
223 | } | |
224 | ||
1d037ca1 IT |
225 | static int process_event_stub(struct perf_tool *tool __maybe_unused, |
226 | union perf_event *event __maybe_unused, | |
227 | struct perf_sample *sample __maybe_unused, | |
228 | struct machine *machine __maybe_unused) | |
06aae590 ACM |
229 | { |
230 | dump_printf(": unhandled!\n"); | |
231 | return 0; | |
232 | } | |
233 | ||
1d037ca1 IT |
234 | static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, |
235 | union perf_event *event __maybe_unused, | |
236 | struct perf_session *perf_session | |
237 | __maybe_unused) | |
743eb868 ACM |
238 | { |
239 | dump_printf(": unhandled!\n"); | |
240 | return 0; | |
241 | } | |
242 | ||
1d037ca1 IT |
243 | static int process_event_type_stub(struct perf_tool *tool __maybe_unused, |
244 | union perf_event *event __maybe_unused) | |
d6b17beb FW |
245 | { |
246 | dump_printf(": unhandled!\n"); | |
247 | return 0; | |
248 | } | |
249 | ||
45694aa7 | 250 | static int process_finished_round(struct perf_tool *tool, |
d20deb64 ACM |
251 | union perf_event *event, |
252 | struct perf_session *session); | |
d6b17beb | 253 | |
45694aa7 | 254 | static void perf_tool__fill_defaults(struct perf_tool *tool) |
06aae590 | 255 | { |
45694aa7 ACM |
256 | if (tool->sample == NULL) |
257 | tool->sample = process_event_sample_stub; | |
258 | if (tool->mmap == NULL) | |
259 | tool->mmap = process_event_stub; | |
260 | if (tool->comm == NULL) | |
261 | tool->comm = process_event_stub; | |
262 | if (tool->fork == NULL) | |
263 | tool->fork = process_event_stub; | |
264 | if (tool->exit == NULL) | |
265 | tool->exit = process_event_stub; | |
266 | if (tool->lost == NULL) | |
267 | tool->lost = perf_event__process_lost; | |
268 | if (tool->read == NULL) | |
269 | tool->read = process_event_sample_stub; | |
270 | if (tool->throttle == NULL) | |
271 | tool->throttle = process_event_stub; | |
272 | if (tool->unthrottle == NULL) | |
273 | tool->unthrottle = process_event_stub; | |
274 | if (tool->attr == NULL) | |
275 | tool->attr = process_event_synth_attr_stub; | |
276 | if (tool->event_type == NULL) | |
277 | tool->event_type = process_event_type_stub; | |
278 | if (tool->tracing_data == NULL) | |
279 | tool->tracing_data = process_event_synth_tracing_data_stub; | |
280 | if (tool->build_id == NULL) | |
281 | tool->build_id = process_finished_round_stub; | |
282 | if (tool->finished_round == NULL) { | |
283 | if (tool->ordered_samples) | |
284 | tool->finished_round = process_finished_round; | |
d6b17beb | 285 | else |
45694aa7 | 286 | tool->finished_round = process_finished_round_stub; |
d6b17beb | 287 | } |
06aae590 | 288 | } |
80c0120a DA |
289 | |
290 | void mem_bswap_32(void *src, int byte_size) | |
291 | { | |
292 | u32 *m = src; | |
293 | while (byte_size > 0) { | |
294 | *m = bswap_32(*m); | |
295 | byte_size -= sizeof(u32); | |
296 | ++m; | |
297 | } | |
298 | } | |
06aae590 | 299 | |
ba21594c ACM |
300 | void mem_bswap_64(void *src, int byte_size) |
301 | { | |
302 | u64 *m = src; | |
303 | ||
304 | while (byte_size > 0) { | |
305 | *m = bswap_64(*m); | |
306 | byte_size -= sizeof(u64); | |
307 | ++m; | |
308 | } | |
309 | } | |
310 | ||
268fb20f JO |
311 | static void swap_sample_id_all(union perf_event *event, void *data) |
312 | { | |
313 | void *end = (void *) event + event->header.size; | |
314 | int size = end - data; | |
315 | ||
316 | BUG_ON(size % sizeof(u64)); | |
317 | mem_bswap_64(data, size); | |
318 | } | |
319 | ||
320 | static void perf_event__all64_swap(union perf_event *event, | |
1d037ca1 | 321 | bool sample_id_all __maybe_unused) |
ba21594c | 322 | { |
8115d60c ACM |
323 | struct perf_event_header *hdr = &event->header; |
324 | mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); | |
ba21594c ACM |
325 | } |
326 | ||
268fb20f | 327 | static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) |
ba21594c | 328 | { |
8115d60c ACM |
329 | event->comm.pid = bswap_32(event->comm.pid); |
330 | event->comm.tid = bswap_32(event->comm.tid); | |
268fb20f JO |
331 | |
332 | if (sample_id_all) { | |
333 | void *data = &event->comm.comm; | |
334 | ||
9ac3e487 | 335 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
268fb20f JO |
336 | swap_sample_id_all(event, data); |
337 | } | |
ba21594c ACM |
338 | } |
339 | ||
268fb20f JO |
340 | static void perf_event__mmap_swap(union perf_event *event, |
341 | bool sample_id_all) | |
ba21594c | 342 | { |
8115d60c ACM |
343 | event->mmap.pid = bswap_32(event->mmap.pid); |
344 | event->mmap.tid = bswap_32(event->mmap.tid); | |
345 | event->mmap.start = bswap_64(event->mmap.start); | |
346 | event->mmap.len = bswap_64(event->mmap.len); | |
347 | event->mmap.pgoff = bswap_64(event->mmap.pgoff); | |
268fb20f JO |
348 | |
349 | if (sample_id_all) { | |
350 | void *data = &event->mmap.filename; | |
351 | ||
9ac3e487 | 352 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
268fb20f JO |
353 | swap_sample_id_all(event, data); |
354 | } | |
ba21594c ACM |
355 | } |
356 | ||
268fb20f | 357 | static void perf_event__task_swap(union perf_event *event, bool sample_id_all) |
ba21594c | 358 | { |
8115d60c ACM |
359 | event->fork.pid = bswap_32(event->fork.pid); |
360 | event->fork.tid = bswap_32(event->fork.tid); | |
361 | event->fork.ppid = bswap_32(event->fork.ppid); | |
362 | event->fork.ptid = bswap_32(event->fork.ptid); | |
363 | event->fork.time = bswap_64(event->fork.time); | |
268fb20f JO |
364 | |
365 | if (sample_id_all) | |
366 | swap_sample_id_all(event, &event->fork + 1); | |
ba21594c ACM |
367 | } |
368 | ||
268fb20f | 369 | static void perf_event__read_swap(union perf_event *event, bool sample_id_all) |
ba21594c | 370 | { |
8115d60c ACM |
371 | event->read.pid = bswap_32(event->read.pid); |
372 | event->read.tid = bswap_32(event->read.tid); | |
373 | event->read.value = bswap_64(event->read.value); | |
374 | event->read.time_enabled = bswap_64(event->read.time_enabled); | |
375 | event->read.time_running = bswap_64(event->read.time_running); | |
376 | event->read.id = bswap_64(event->read.id); | |
268fb20f JO |
377 | |
378 | if (sample_id_all) | |
379 | swap_sample_id_all(event, &event->read + 1); | |
ba21594c ACM |
380 | } |
381 | ||
e108c66e JO |
382 | static u8 revbyte(u8 b) |
383 | { | |
384 | int rev = (b >> 4) | ((b & 0xf) << 4); | |
385 | rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); | |
386 | rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); | |
387 | return (u8) rev; | |
388 | } | |
389 | ||
390 | /* | |
391 | * XXX this is hack in attempt to carry flags bitfield | |
392 | * throught endian village. ABI says: | |
393 | * | |
394 | * Bit-fields are allocated from right to left (least to most significant) | |
395 | * on little-endian implementations and from left to right (most to least | |
396 | * significant) on big-endian implementations. | |
397 | * | |
398 | * The above seems to be byte specific, so we need to reverse each | |
399 | * byte of the bitfield. 'Internet' also says this might be implementation | |
400 | * specific and we probably need proper fix and carry perf_event_attr | |
401 | * bitfield flags in separate data file FEAT_ section. Thought this seems | |
402 | * to work for now. | |
403 | */ | |
404 | static void swap_bitfield(u8 *p, unsigned len) | |
405 | { | |
406 | unsigned i; | |
407 | ||
408 | for (i = 0; i < len; i++) { | |
409 | *p = revbyte(*p); | |
410 | p++; | |
411 | } | |
412 | } | |
413 | ||
eda3913b DA |
414 | /* exported for swapping attributes in file header */ |
415 | void perf_event__attr_swap(struct perf_event_attr *attr) | |
416 | { | |
417 | attr->type = bswap_32(attr->type); | |
418 | attr->size = bswap_32(attr->size); | |
419 | attr->config = bswap_64(attr->config); | |
420 | attr->sample_period = bswap_64(attr->sample_period); | |
421 | attr->sample_type = bswap_64(attr->sample_type); | |
422 | attr->read_format = bswap_64(attr->read_format); | |
423 | attr->wakeup_events = bswap_32(attr->wakeup_events); | |
424 | attr->bp_type = bswap_32(attr->bp_type); | |
425 | attr->bp_addr = bswap_64(attr->bp_addr); | |
426 | attr->bp_len = bswap_64(attr->bp_len); | |
e108c66e JO |
427 | |
428 | swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); | |
eda3913b DA |
429 | } |
430 | ||
268fb20f | 431 | static void perf_event__hdr_attr_swap(union perf_event *event, |
1d037ca1 | 432 | bool sample_id_all __maybe_unused) |
2c46dbb5 TZ |
433 | { |
434 | size_t size; | |
435 | ||
eda3913b | 436 | perf_event__attr_swap(&event->attr.attr); |
2c46dbb5 | 437 | |
8115d60c ACM |
438 | size = event->header.size; |
439 | size -= (void *)&event->attr.id - (void *)event; | |
440 | mem_bswap_64(event->attr.id, size); | |
2c46dbb5 TZ |
441 | } |
442 | ||
268fb20f | 443 | static void perf_event__event_type_swap(union perf_event *event, |
1d037ca1 | 444 | bool sample_id_all __maybe_unused) |
cd19a035 | 445 | { |
8115d60c ACM |
446 | event->event_type.event_type.event_id = |
447 | bswap_64(event->event_type.event_type.event_id); | |
cd19a035 TZ |
448 | } |
449 | ||
268fb20f | 450 | static void perf_event__tracing_data_swap(union perf_event *event, |
1d037ca1 | 451 | bool sample_id_all __maybe_unused) |
9215545e | 452 | { |
8115d60c | 453 | event->tracing_data.size = bswap_32(event->tracing_data.size); |
9215545e TZ |
454 | } |
455 | ||
268fb20f JO |
456 | typedef void (*perf_event__swap_op)(union perf_event *event, |
457 | bool sample_id_all); | |
ba21594c | 458 | |
8115d60c ACM |
459 | static perf_event__swap_op perf_event__swap_ops[] = { |
460 | [PERF_RECORD_MMAP] = perf_event__mmap_swap, | |
461 | [PERF_RECORD_COMM] = perf_event__comm_swap, | |
462 | [PERF_RECORD_FORK] = perf_event__task_swap, | |
463 | [PERF_RECORD_EXIT] = perf_event__task_swap, | |
464 | [PERF_RECORD_LOST] = perf_event__all64_swap, | |
465 | [PERF_RECORD_READ] = perf_event__read_swap, | |
466 | [PERF_RECORD_SAMPLE] = perf_event__all64_swap, | |
eda3913b | 467 | [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, |
8115d60c ACM |
468 | [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, |
469 | [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, | |
470 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, | |
471 | [PERF_RECORD_HEADER_MAX] = NULL, | |
ba21594c ACM |
472 | }; |
473 | ||
c61e52ee FW |
474 | struct sample_queue { |
475 | u64 timestamp; | |
e4c2df13 | 476 | u64 file_offset; |
8115d60c | 477 | union perf_event *event; |
c61e52ee FW |
478 | struct list_head list; |
479 | }; | |
480 | ||
020bb75a TG |
481 | static void perf_session_free_sample_buffers(struct perf_session *session) |
482 | { | |
483 | struct ordered_samples *os = &session->ordered_samples; | |
484 | ||
5c891f38 | 485 | while (!list_empty(&os->to_free)) { |
020bb75a TG |
486 | struct sample_queue *sq; |
487 | ||
5c891f38 | 488 | sq = list_entry(os->to_free.next, struct sample_queue, list); |
020bb75a TG |
489 | list_del(&sq->list); |
490 | free(sq); | |
491 | } | |
492 | } | |
493 | ||
cbf41645 | 494 | static int perf_session_deliver_event(struct perf_session *session, |
8115d60c | 495 | union perf_event *event, |
8d50e5b4 | 496 | struct perf_sample *sample, |
45694aa7 | 497 | struct perf_tool *tool, |
f74725dc | 498 | u64 file_offset); |
cbf41645 | 499 | |
d25380cd | 500 | static int flush_sample_queue(struct perf_session *s, |
45694aa7 | 501 | struct perf_tool *tool) |
c61e52ee | 502 | { |
a1225dec TG |
503 | struct ordered_samples *os = &s->ordered_samples; |
504 | struct list_head *head = &os->samples; | |
c61e52ee | 505 | struct sample_queue *tmp, *iter; |
8d50e5b4 | 506 | struct perf_sample sample; |
a1225dec TG |
507 | u64 limit = os->next_flush; |
508 | u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; | |
88660563 | 509 | unsigned idx = 0, progress_next = os->nr_samples / 16; |
5538beca | 510 | int ret; |
c61e52ee | 511 | |
45694aa7 | 512 | if (!tool->ordered_samples || !limit) |
d25380cd | 513 | return 0; |
c61e52ee FW |
514 | |
515 | list_for_each_entry_safe(iter, tmp, head, list) { | |
516 | if (iter->timestamp > limit) | |
a1225dec | 517 | break; |
c61e52ee | 518 | |
0807d2d8 | 519 | ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); |
5538beca FW |
520 | if (ret) |
521 | pr_err("Can't parse sample, err = %d\n", ret); | |
d25380cd DA |
522 | else { |
523 | ret = perf_session_deliver_event(s, iter->event, &sample, tool, | |
524 | iter->file_offset); | |
525 | if (ret) | |
526 | return ret; | |
527 | } | |
c61e52ee | 528 | |
a1225dec | 529 | os->last_flush = iter->timestamp; |
c61e52ee | 530 | list_del(&iter->list); |
020bb75a | 531 | list_add(&iter->list, &os->sample_cache); |
88660563 ACM |
532 | if (++idx >= progress_next) { |
533 | progress_next += os->nr_samples / 16; | |
534 | ui_progress__update(idx, os->nr_samples, | |
535 | "Processing time ordered events..."); | |
536 | } | |
c61e52ee | 537 | } |
a1225dec TG |
538 | |
539 | if (list_empty(head)) { | |
540 | os->last_sample = NULL; | |
541 | } else if (last_ts <= limit) { | |
542 | os->last_sample = | |
543 | list_entry(head->prev, struct sample_queue, list); | |
544 | } | |
88660563 ACM |
545 | |
546 | os->nr_samples = 0; | |
d25380cd DA |
547 | |
548 | return 0; | |
c61e52ee FW |
549 | } |
550 | ||
d6b17beb FW |
551 | /* |
552 | * When perf record finishes a pass on every buffers, it records this pseudo | |
553 | * event. | |
554 | * We record the max timestamp t found in the pass n. | |
555 | * Assuming these timestamps are monotonic across cpus, we know that if | |
556 | * a buffer still has events with timestamps below t, they will be all | |
557 | * available and then read in the pass n + 1. | |
558 | * Hence when we start to read the pass n + 2, we can safely flush every | |
559 | * events with timestamps below t. | |
560 | * | |
561 | * ============ PASS n ================= | |
562 | * CPU 0 | CPU 1 | |
563 | * | | |
564 | * cnt1 timestamps | cnt2 timestamps | |
565 | * 1 | 2 | |
566 | * 2 | 3 | |
567 | * - | 4 <--- max recorded | |
568 | * | |
569 | * ============ PASS n + 1 ============== | |
570 | * CPU 0 | CPU 1 | |
571 | * | | |
572 | * cnt1 timestamps | cnt2 timestamps | |
573 | * 3 | 5 | |
574 | * 4 | 6 | |
575 | * 5 | 7 <---- max recorded | |
576 | * | |
577 | * Flush every events below timestamp 4 | |
578 | * | |
579 | * ============ PASS n + 2 ============== | |
580 | * CPU 0 | CPU 1 | |
581 | * | | |
582 | * cnt1 timestamps | cnt2 timestamps | |
583 | * 6 | 8 | |
584 | * 7 | 9 | |
585 | * - | 10 | |
586 | * | |
587 | * Flush every events below timestamp 7 | |
588 | * etc... | |
589 | */ | |
45694aa7 | 590 | static int process_finished_round(struct perf_tool *tool, |
1d037ca1 | 591 | union perf_event *event __maybe_unused, |
d20deb64 | 592 | struct perf_session *session) |
d6b17beb | 593 | { |
d25380cd DA |
594 | int ret = flush_sample_queue(session, tool); |
595 | if (!ret) | |
596 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
d6b17beb | 597 | |
d25380cd | 598 | return ret; |
d6b17beb FW |
599 | } |
600 | ||
c61e52ee | 601 | /* The queue is ordered by time */ |
cbf41645 | 602 | static void __queue_event(struct sample_queue *new, struct perf_session *s) |
c61e52ee | 603 | { |
a1225dec TG |
604 | struct ordered_samples *os = &s->ordered_samples; |
605 | struct sample_queue *sample = os->last_sample; | |
606 | u64 timestamp = new->timestamp; | |
607 | struct list_head *p; | |
c61e52ee | 608 | |
88660563 | 609 | ++os->nr_samples; |
a1225dec | 610 | os->last_sample = new; |
c61e52ee | 611 | |
a1225dec TG |
612 | if (!sample) { |
613 | list_add(&new->list, &os->samples); | |
614 | os->max_timestamp = timestamp; | |
c61e52ee FW |
615 | return; |
616 | } | |
617 | ||
618 | /* | |
a1225dec TG |
619 | * last_sample might point to some random place in the list as it's |
620 | * the last queued event. We expect that the new event is close to | |
621 | * this. | |
c61e52ee | 622 | */ |
a1225dec TG |
623 | if (sample->timestamp <= timestamp) { |
624 | while (sample->timestamp <= timestamp) { | |
625 | p = sample->list.next; | |
626 | if (p == &os->samples) { | |
627 | list_add_tail(&new->list, &os->samples); | |
628 | os->max_timestamp = timestamp; | |
629 | return; | |
630 | } | |
631 | sample = list_entry(p, struct sample_queue, list); | |
632 | } | |
633 | list_add_tail(&new->list, &sample->list); | |
634 | } else { | |
635 | while (sample->timestamp > timestamp) { | |
636 | p = sample->list.prev; | |
637 | if (p == &os->samples) { | |
638 | list_add(&new->list, &os->samples); | |
639 | return; | |
640 | } | |
641 | sample = list_entry(p, struct sample_queue, list); | |
642 | } | |
643 | list_add(&new->list, &sample->list); | |
644 | } | |
c61e52ee FW |
645 | } |
646 | ||
5c891f38 TG |
647 | #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) |
648 | ||
8115d60c | 649 | static int perf_session_queue_event(struct perf_session *s, union perf_event *event, |
8d50e5b4 | 650 | struct perf_sample *sample, u64 file_offset) |
c61e52ee | 651 | { |
5c891f38 TG |
652 | struct ordered_samples *os = &s->ordered_samples; |
653 | struct list_head *sc = &os->sample_cache; | |
8d50e5b4 | 654 | u64 timestamp = sample->time; |
c61e52ee | 655 | struct sample_queue *new; |
c61e52ee | 656 | |
79a14c1f | 657 | if (!timestamp || timestamp == ~0ULL) |
cbf41645 TG |
658 | return -ETIME; |
659 | ||
c61e52ee FW |
660 | if (timestamp < s->ordered_samples.last_flush) { |
661 | printf("Warning: Timestamp below last timeslice flush\n"); | |
662 | return -EINVAL; | |
663 | } | |
664 | ||
020bb75a TG |
665 | if (!list_empty(sc)) { |
666 | new = list_entry(sc->next, struct sample_queue, list); | |
667 | list_del(&new->list); | |
5c891f38 TG |
668 | } else if (os->sample_buffer) { |
669 | new = os->sample_buffer + os->sample_buffer_idx; | |
670 | if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) | |
671 | os->sample_buffer = NULL; | |
020bb75a | 672 | } else { |
5c891f38 TG |
673 | os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); |
674 | if (!os->sample_buffer) | |
020bb75a | 675 | return -ENOMEM; |
5c891f38 TG |
676 | list_add(&os->sample_buffer->list, &os->to_free); |
677 | os->sample_buffer_idx = 2; | |
678 | new = os->sample_buffer + 1; | |
020bb75a | 679 | } |
c61e52ee FW |
680 | |
681 | new->timestamp = timestamp; | |
e4c2df13 | 682 | new->file_offset = file_offset; |
fe174207 | 683 | new->event = event; |
c61e52ee | 684 | |
cbf41645 | 685 | __queue_event(new, s); |
640c03ce | 686 | |
640c03ce ACM |
687 | return 0; |
688 | } | |
c61e52ee | 689 | |
8d50e5b4 | 690 | static void callchain__printf(struct perf_sample *sample) |
640c03ce ACM |
691 | { |
692 | unsigned int i; | |
c61e52ee | 693 | |
9486aa38 | 694 | printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); |
640c03ce ACM |
695 | |
696 | for (i = 0; i < sample->callchain->nr; i++) | |
9486aa38 ACM |
697 | printf("..... %2d: %016" PRIx64 "\n", |
698 | i, sample->callchain->ips[i]); | |
c61e52ee FW |
699 | } |
700 | ||
b5387528 RAV |
701 | static void branch_stack__printf(struct perf_sample *sample) |
702 | { | |
703 | uint64_t i; | |
704 | ||
705 | printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); | |
706 | ||
707 | for (i = 0; i < sample->branch_stack->nr; i++) | |
708 | printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", | |
709 | i, sample->branch_stack->entries[i].from, | |
710 | sample->branch_stack->entries[i].to); | |
711 | } | |
712 | ||
0f6a3015 JO |
713 | static void regs_dump__printf(u64 mask, u64 *regs) |
714 | { | |
715 | unsigned rid, i = 0; | |
716 | ||
717 | for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { | |
718 | u64 val = regs[i++]; | |
719 | ||
720 | printf(".... %-5s 0x%" PRIx64 "\n", | |
721 | perf_reg_name(rid), val); | |
722 | } | |
723 | } | |
724 | ||
725 | static void regs_user__printf(struct perf_sample *sample, u64 mask) | |
726 | { | |
727 | struct regs_dump *user_regs = &sample->user_regs; | |
728 | ||
729 | if (user_regs->regs) { | |
730 | printf("... user regs: mask 0x%" PRIx64 "\n", mask); | |
731 | regs_dump__printf(mask, user_regs->regs); | |
732 | } | |
733 | } | |
734 | ||
735 | static void stack_user__printf(struct stack_dump *dump) | |
736 | { | |
737 | printf("... ustack: size %" PRIu64 ", offset 0x%x\n", | |
738 | dump->size, dump->offset); | |
739 | } | |
740 | ||
9c90a61c | 741 | static void perf_session__print_tstamp(struct perf_session *session, |
8115d60c | 742 | union perf_event *event, |
8d50e5b4 | 743 | struct perf_sample *sample) |
9c90a61c | 744 | { |
7f3be652 ACM |
745 | u64 sample_type = perf_evlist__sample_type(session->evlist); |
746 | ||
9c90a61c | 747 | if (event->header.type != PERF_RECORD_SAMPLE && |
5e562474 | 748 | !perf_evlist__sample_id_all(session->evlist)) { |
9c90a61c ACM |
749 | fputs("-1 -1 ", stdout); |
750 | return; | |
751 | } | |
752 | ||
7f3be652 | 753 | if ((sample_type & PERF_SAMPLE_CPU)) |
9c90a61c ACM |
754 | printf("%u ", sample->cpu); |
755 | ||
7f3be652 | 756 | if (sample_type & PERF_SAMPLE_TIME) |
9486aa38 | 757 | printf("%" PRIu64 " ", sample->time); |
9c90a61c ACM |
758 | } |
759 | ||
8115d60c | 760 | static void dump_event(struct perf_session *session, union perf_event *event, |
8d50e5b4 | 761 | u64 file_offset, struct perf_sample *sample) |
9aefcab0 TG |
762 | { |
763 | if (!dump_trace) | |
764 | return; | |
765 | ||
9486aa38 ACM |
766 | printf("\n%#" PRIx64 " [%#x]: event: %d\n", |
767 | file_offset, event->header.size, event->header.type); | |
9aefcab0 TG |
768 | |
769 | trace_event(event); | |
770 | ||
771 | if (sample) | |
772 | perf_session__print_tstamp(session, event, sample); | |
773 | ||
9486aa38 | 774 | printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, |
8115d60c | 775 | event->header.size, perf_event__name(event->header.type)); |
9aefcab0 TG |
776 | } |
777 | ||
0f6a3015 | 778 | static void dump_sample(struct perf_evsel *evsel, union perf_event *event, |
8d50e5b4 | 779 | struct perf_sample *sample) |
9aefcab0 | 780 | { |
7f3be652 ACM |
781 | u64 sample_type; |
782 | ||
ddbc24b7 ACM |
783 | if (!dump_trace) |
784 | return; | |
785 | ||
7cec0922 | 786 | printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", |
9486aa38 | 787 | event->header.misc, sample->pid, sample->tid, sample->ip, |
7cec0922 | 788 | sample->period, sample->addr); |
9aefcab0 | 789 | |
0f6a3015 | 790 | sample_type = evsel->attr.sample_type; |
7f3be652 ACM |
791 | |
792 | if (sample_type & PERF_SAMPLE_CALLCHAIN) | |
ddbc24b7 | 793 | callchain__printf(sample); |
b5387528 | 794 | |
7f3be652 | 795 | if (sample_type & PERF_SAMPLE_BRANCH_STACK) |
b5387528 | 796 | branch_stack__printf(sample); |
0f6a3015 JO |
797 | |
798 | if (sample_type & PERF_SAMPLE_REGS_USER) | |
799 | regs_user__printf(sample, evsel->attr.sample_regs_user); | |
800 | ||
801 | if (sample_type & PERF_SAMPLE_STACK_USER) | |
802 | stack_user__printf(&sample->user_stack); | |
9aefcab0 TG |
803 | } |
804 | ||
743eb868 ACM |
805 | static struct machine * |
806 | perf_session__find_machine_for_cpumode(struct perf_session *session, | |
807 | union perf_event *event) | |
808 | { | |
809 | const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
810 | ||
7c0f4a41 DA |
811 | if (perf_guest && |
812 | ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || | |
813 | (cpumode == PERF_RECORD_MISC_GUEST_USER))) { | |
7fb0a5ee ND |
814 | u32 pid; |
815 | ||
816 | if (event->header.type == PERF_RECORD_MMAP) | |
817 | pid = event->mmap.pid; | |
818 | else | |
819 | pid = event->ip.pid; | |
820 | ||
207b5792 | 821 | return perf_session__findnew_machine(session, pid); |
7fb0a5ee | 822 | } |
743eb868 ACM |
823 | |
824 | return perf_session__find_host_machine(session); | |
825 | } | |
826 | ||
cbf41645 | 827 | static int perf_session_deliver_event(struct perf_session *session, |
8115d60c | 828 | union perf_event *event, |
8d50e5b4 | 829 | struct perf_sample *sample, |
45694aa7 | 830 | struct perf_tool *tool, |
532e7269 | 831 | u64 file_offset) |
cbf41645 | 832 | { |
9e69c210 | 833 | struct perf_evsel *evsel; |
743eb868 | 834 | struct machine *machine; |
9e69c210 | 835 | |
532e7269 TG |
836 | dump_event(session, event, file_offset, sample); |
837 | ||
7b27509f ACM |
838 | evsel = perf_evlist__id2evsel(session->evlist, sample->id); |
839 | if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { | |
840 | /* | |
841 | * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here | |
842 | * because the tools right now may apply filters, discarding | |
843 | * some of the samples. For consistency, in the future we | |
844 | * should have something like nr_filtered_samples and remove | |
845 | * the sample->period from total_sample_period, etc, KISS for | |
846 | * now tho. | |
847 | * | |
848 | * Also testing against NULL allows us to handle files without | |
849 | * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the | |
850 | * future probably it'll be a good idea to restrict event | |
851 | * processing via perf_session to files with both set. | |
852 | */ | |
853 | hists__inc_nr_events(&evsel->hists, event->header.type); | |
854 | } | |
855 | ||
743eb868 ACM |
856 | machine = perf_session__find_machine_for_cpumode(session, event); |
857 | ||
cbf41645 TG |
858 | switch (event->header.type) { |
859 | case PERF_RECORD_SAMPLE: | |
0f6a3015 | 860 | dump_sample(evsel, event, sample); |
9e69c210 | 861 | if (evsel == NULL) { |
28a6b6aa | 862 | ++session->stats.nr_unknown_id; |
6782206b | 863 | return 0; |
9e69c210 | 864 | } |
0c095715 | 865 | if (machine == NULL) { |
28a6b6aa | 866 | ++session->stats.nr_unprocessable_samples; |
6782206b | 867 | return 0; |
0c095715 | 868 | } |
45694aa7 | 869 | return tool->sample(tool, event, sample, evsel, machine); |
cbf41645 | 870 | case PERF_RECORD_MMAP: |
45694aa7 | 871 | return tool->mmap(tool, event, sample, machine); |
cbf41645 | 872 | case PERF_RECORD_COMM: |
45694aa7 | 873 | return tool->comm(tool, event, sample, machine); |
cbf41645 | 874 | case PERF_RECORD_FORK: |
45694aa7 | 875 | return tool->fork(tool, event, sample, machine); |
cbf41645 | 876 | case PERF_RECORD_EXIT: |
45694aa7 | 877 | return tool->exit(tool, event, sample, machine); |
cbf41645 | 878 | case PERF_RECORD_LOST: |
45694aa7 | 879 | if (tool->lost == perf_event__process_lost) |
28a6b6aa | 880 | session->stats.total_lost += event->lost.lost; |
45694aa7 | 881 | return tool->lost(tool, event, sample, machine); |
cbf41645 | 882 | case PERF_RECORD_READ: |
45694aa7 | 883 | return tool->read(tool, event, sample, evsel, machine); |
cbf41645 | 884 | case PERF_RECORD_THROTTLE: |
45694aa7 | 885 | return tool->throttle(tool, event, sample, machine); |
cbf41645 | 886 | case PERF_RECORD_UNTHROTTLE: |
45694aa7 | 887 | return tool->unthrottle(tool, event, sample, machine); |
cbf41645 | 888 | default: |
28a6b6aa | 889 | ++session->stats.nr_unknown_events; |
cbf41645 TG |
890 | return -1; |
891 | } | |
892 | } | |
893 | ||
3dfc2c0a | 894 | static int perf_session__preprocess_sample(struct perf_session *session, |
8115d60c | 895 | union perf_event *event, struct perf_sample *sample) |
3dfc2c0a TG |
896 | { |
897 | if (event->header.type != PERF_RECORD_SAMPLE || | |
7f3be652 | 898 | !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN)) |
3dfc2c0a TG |
899 | return 0; |
900 | ||
901 | if (!ip_callchain__valid(sample->callchain, event)) { | |
902 | pr_debug("call-chain problem with event, skipping it.\n"); | |
28a6b6aa ACM |
903 | ++session->stats.nr_invalid_chains; |
904 | session->stats.total_invalid_chains += sample->period; | |
3dfc2c0a TG |
905 | return -EINVAL; |
906 | } | |
907 | return 0; | |
908 | } | |
909 | ||
8115d60c | 910 | static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, |
45694aa7 | 911 | struct perf_tool *tool, u64 file_offset) |
06aae590 | 912 | { |
10d0f086 ACM |
913 | int err; |
914 | ||
ba74f064 | 915 | dump_event(session, event, file_offset, NULL); |
06aae590 | 916 | |
cbf41645 | 917 | /* These events are processed right away */ |
06aae590 | 918 | switch (event->header.type) { |
2c46dbb5 | 919 | case PERF_RECORD_HEADER_ATTR: |
45694aa7 | 920 | err = tool->attr(event, &session->evlist); |
10d0f086 | 921 | if (err == 0) |
7b56cce2 | 922 | perf_session__set_id_hdr_size(session); |
10d0f086 | 923 | return err; |
cd19a035 | 924 | case PERF_RECORD_HEADER_EVENT_TYPE: |
45694aa7 | 925 | return tool->event_type(tool, event); |
9215545e TZ |
926 | case PERF_RECORD_HEADER_TRACING_DATA: |
927 | /* setup for reading amidst mmap */ | |
cbf41645 | 928 | lseek(session->fd, file_offset, SEEK_SET); |
45694aa7 | 929 | return tool->tracing_data(event, session); |
c7929e47 | 930 | case PERF_RECORD_HEADER_BUILD_ID: |
45694aa7 | 931 | return tool->build_id(tool, event, session); |
d6b17beb | 932 | case PERF_RECORD_FINISHED_ROUND: |
45694aa7 | 933 | return tool->finished_round(tool, event, session); |
06aae590 | 934 | default: |
ba74f064 | 935 | return -EINVAL; |
06aae590 | 936 | } |
ba74f064 TG |
937 | } |
938 | ||
268fb20f JO |
939 | static void event_swap(union perf_event *event, bool sample_id_all) |
940 | { | |
941 | perf_event__swap_op swap; | |
942 | ||
943 | swap = perf_event__swap_ops[event->header.type]; | |
944 | if (swap) | |
945 | swap(event, sample_id_all); | |
946 | } | |
947 | ||
ba74f064 | 948 | static int perf_session__process_event(struct perf_session *session, |
8115d60c | 949 | union perf_event *event, |
45694aa7 | 950 | struct perf_tool *tool, |
ba74f064 TG |
951 | u64 file_offset) |
952 | { | |
8d50e5b4 | 953 | struct perf_sample sample; |
ba74f064 TG |
954 | int ret; |
955 | ||
268fb20f | 956 | if (session->header.needs_swap) |
5e562474 | 957 | event_swap(event, perf_evlist__sample_id_all(session->evlist)); |
ba74f064 TG |
958 | |
959 | if (event->header.type >= PERF_RECORD_HEADER_MAX) | |
960 | return -EINVAL; | |
961 | ||
28a6b6aa | 962 | events_stats__inc(&session->stats, event->header.type); |
ba74f064 TG |
963 | |
964 | if (event->header.type >= PERF_RECORD_USER_TYPE_START) | |
45694aa7 | 965 | return perf_session__process_user_event(session, event, tool, file_offset); |
cbf41645 | 966 | |
3dfc2c0a TG |
967 | /* |
968 | * For all kernel events we get the sample data | |
969 | */ | |
0807d2d8 | 970 | ret = perf_evlist__parse_sample(session->evlist, event, &sample); |
5538beca FW |
971 | if (ret) |
972 | return ret; | |
3dfc2c0a TG |
973 | |
974 | /* Preprocess sample records - precheck callchains */ | |
975 | if (perf_session__preprocess_sample(session, event, &sample)) | |
976 | return 0; | |
977 | ||
45694aa7 | 978 | if (tool->ordered_samples) { |
e4c2df13 TG |
979 | ret = perf_session_queue_event(session, event, &sample, |
980 | file_offset); | |
cbf41645 TG |
981 | if (ret != -ETIME) |
982 | return ret; | |
983 | } | |
984 | ||
45694aa7 | 985 | return perf_session_deliver_event(session, event, &sample, tool, |
f74725dc | 986 | file_offset); |
06aae590 ACM |
987 | } |
988 | ||
ba21594c ACM |
989 | void perf_event_header__bswap(struct perf_event_header *self) |
990 | { | |
991 | self->type = bswap_32(self->type); | |
992 | self->misc = bswap_16(self->misc); | |
993 | self->size = bswap_16(self->size); | |
994 | } | |
995 | ||
b424eba2 ACM |
996 | struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) |
997 | { | |
876650e6 | 998 | return machine__findnew_thread(&session->machines.host, pid); |
b424eba2 ACM |
999 | } |
1000 | ||
06aae590 ACM |
1001 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
1002 | { | |
1003 | struct thread *thread = perf_session__findnew(self, 0); | |
1004 | ||
1005 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
1006 | pr_err("problem inserting idle task.\n"); | |
1007 | thread = NULL; | |
1008 | } | |
1009 | ||
1010 | return thread; | |
1011 | } | |
1012 | ||
11095994 | 1013 | static void perf_session__warn_about_errors(const struct perf_session *session, |
45694aa7 | 1014 | const struct perf_tool *tool) |
11095994 | 1015 | { |
45694aa7 | 1016 | if (tool->lost == perf_event__process_lost && |
28a6b6aa | 1017 | session->stats.nr_events[PERF_RECORD_LOST] != 0) { |
7b27509f ACM |
1018 | ui__warning("Processed %d events and lost %d chunks!\n\n" |
1019 | "Check IO/CPU overload!\n\n", | |
28a6b6aa ACM |
1020 | session->stats.nr_events[0], |
1021 | session->stats.nr_events[PERF_RECORD_LOST]); | |
11095994 ACM |
1022 | } |
1023 | ||
28a6b6aa | 1024 | if (session->stats.nr_unknown_events != 0) { |
11095994 ACM |
1025 | ui__warning("Found %u unknown events!\n\n" |
1026 | "Is this an older tool processing a perf.data " | |
1027 | "file generated by a more recent tool?\n\n" | |
1028 | "If that is not the case, consider " | |
1029 | "reporting to linux-kernel@vger.kernel.org.\n\n", | |
28a6b6aa | 1030 | session->stats.nr_unknown_events); |
11095994 ACM |
1031 | } |
1032 | ||
28a6b6aa | 1033 | if (session->stats.nr_unknown_id != 0) { |
9e69c210 | 1034 | ui__warning("%u samples with id not present in the header\n", |
28a6b6aa | 1035 | session->stats.nr_unknown_id); |
9e69c210 ACM |
1036 | } |
1037 | ||
28a6b6aa | 1038 | if (session->stats.nr_invalid_chains != 0) { |
11095994 ACM |
1039 | ui__warning("Found invalid callchains!\n\n" |
1040 | "%u out of %u events were discarded for this reason.\n\n" | |
1041 | "Consider reporting to linux-kernel@vger.kernel.org.\n\n", | |
28a6b6aa ACM |
1042 | session->stats.nr_invalid_chains, |
1043 | session->stats.nr_events[PERF_RECORD_SAMPLE]); | |
11095994 | 1044 | } |
0c095715 | 1045 | |
28a6b6aa | 1046 | if (session->stats.nr_unprocessable_samples != 0) { |
0c095715 JR |
1047 | ui__warning("%u unprocessable samples recorded.\n" |
1048 | "Do you have a KVM guest running and not using 'perf kvm'?\n", | |
28a6b6aa | 1049 | session->stats.nr_unprocessable_samples); |
0c095715 | 1050 | } |
11095994 ACM |
1051 | } |
1052 | ||
8dc58101 TZ |
1053 | #define session_done() (*(volatile int *)(&session_done)) |
1054 | volatile int session_done; | |
1055 | ||
1056 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
45694aa7 | 1057 | struct perf_tool *tool) |
8dc58101 | 1058 | { |
444d2866 SE |
1059 | union perf_event *event; |
1060 | uint32_t size, cur_size = 0; | |
1061 | void *buf = NULL; | |
8dc58101 TZ |
1062 | int skip = 0; |
1063 | u64 head; | |
1064 | int err; | |
1065 | void *p; | |
1066 | ||
45694aa7 | 1067 | perf_tool__fill_defaults(tool); |
8dc58101 TZ |
1068 | |
1069 | head = 0; | |
444d2866 SE |
1070 | cur_size = sizeof(union perf_event); |
1071 | ||
1072 | buf = malloc(cur_size); | |
1073 | if (!buf) | |
1074 | return -errno; | |
8dc58101 | 1075 | more: |
444d2866 SE |
1076 | event = buf; |
1077 | err = readn(self->fd, event, sizeof(struct perf_event_header)); | |
8dc58101 TZ |
1078 | if (err <= 0) { |
1079 | if (err == 0) | |
1080 | goto done; | |
1081 | ||
1082 | pr_err("failed to read event header\n"); | |
1083 | goto out_err; | |
1084 | } | |
1085 | ||
1086 | if (self->header.needs_swap) | |
444d2866 | 1087 | perf_event_header__bswap(&event->header); |
8dc58101 | 1088 | |
444d2866 | 1089 | size = event->header.size; |
8dc58101 TZ |
1090 | if (size == 0) |
1091 | size = 8; | |
1092 | ||
444d2866 SE |
1093 | if (size > cur_size) { |
1094 | void *new = realloc(buf, size); | |
1095 | if (!new) { | |
1096 | pr_err("failed to allocate memory to read event\n"); | |
1097 | goto out_err; | |
1098 | } | |
1099 | buf = new; | |
1100 | cur_size = size; | |
1101 | event = buf; | |
1102 | } | |
1103 | p = event; | |
8dc58101 TZ |
1104 | p += sizeof(struct perf_event_header); |
1105 | ||
794e43b5 | 1106 | if (size - sizeof(struct perf_event_header)) { |
1e7972cc | 1107 | err = readn(self->fd, p, size - sizeof(struct perf_event_header)); |
794e43b5 TZ |
1108 | if (err <= 0) { |
1109 | if (err == 0) { | |
1110 | pr_err("unexpected end of event stream\n"); | |
1111 | goto done; | |
1112 | } | |
8dc58101 | 1113 | |
794e43b5 TZ |
1114 | pr_err("failed to read event data\n"); |
1115 | goto out_err; | |
1116 | } | |
8dc58101 TZ |
1117 | } |
1118 | ||
444d2866 | 1119 | if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { |
9389a460 | 1120 | pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", |
444d2866 | 1121 | head, event->header.size, event->header.type); |
9389a460 JO |
1122 | err = -EINVAL; |
1123 | goto out_err; | |
8dc58101 TZ |
1124 | } |
1125 | ||
1126 | head += size; | |
1127 | ||
8dc58101 TZ |
1128 | if (skip > 0) |
1129 | head += skip; | |
1130 | ||
1131 | if (!session_done()) | |
1132 | goto more; | |
1133 | done: | |
1134 | err = 0; | |
1135 | out_err: | |
444d2866 | 1136 | free(buf); |
45694aa7 | 1137 | perf_session__warn_about_errors(self, tool); |
020bb75a | 1138 | perf_session_free_sample_buffers(self); |
8dc58101 TZ |
1139 | return err; |
1140 | } | |
1141 | ||
998bedc8 FW |
1142 | static union perf_event * |
1143 | fetch_mmaped_event(struct perf_session *session, | |
1144 | u64 head, size_t mmap_size, char *buf) | |
1145 | { | |
1146 | union perf_event *event; | |
1147 | ||
1148 | /* | |
1149 | * Ensure we have enough space remaining to read | |
1150 | * the size of the event in the headers. | |
1151 | */ | |
1152 | if (head + sizeof(event->header) > mmap_size) | |
1153 | return NULL; | |
1154 | ||
1155 | event = (union perf_event *)(buf + head); | |
1156 | ||
1157 | if (session->header.needs_swap) | |
1158 | perf_event_header__bswap(&event->header); | |
1159 | ||
1160 | if (head + event->header.size > mmap_size) | |
1161 | return NULL; | |
1162 | ||
1163 | return event; | |
1164 | } | |
1165 | ||
35d48ddf DM |
1166 | /* |
1167 | * On 64bit we can mmap the data file in one go. No need for tiny mmap | |
1168 | * slices. On 32bit we use 32MB. | |
1169 | */ | |
1170 | #if BITS_PER_LONG == 64 | |
1171 | #define MMAP_SIZE ULLONG_MAX | |
1172 | #define NUM_MMAPS 1 | |
1173 | #else | |
1174 | #define MMAP_SIZE (32 * 1024 * 1024ULL) | |
1175 | #define NUM_MMAPS 128 | |
1176 | #endif | |
1177 | ||
0331ee0c | 1178 | int __perf_session__process_events(struct perf_session *session, |
6122e4e4 | 1179 | u64 data_offset, u64 data_size, |
45694aa7 | 1180 | u64 file_size, struct perf_tool *tool) |
06aae590 | 1181 | { |
55b44629 | 1182 | u64 head, page_offset, file_offset, file_pos, progress_next; |
fe174207 | 1183 | int err, mmap_prot, mmap_flags, map_idx = 0; |
0c1fe6b2 | 1184 | size_t mmap_size; |
35d48ddf | 1185 | char *buf, *mmaps[NUM_MMAPS]; |
8115d60c | 1186 | union perf_event *event; |
06aae590 | 1187 | uint32_t size; |
0331ee0c | 1188 | |
45694aa7 | 1189 | perf_tool__fill_defaults(tool); |
06aae590 | 1190 | |
0331ee0c TG |
1191 | page_offset = page_size * (data_offset / page_size); |
1192 | file_offset = page_offset; | |
1193 | head = data_offset - page_offset; | |
06aae590 | 1194 | |
d6513281 TG |
1195 | if (data_offset + data_size < file_size) |
1196 | file_size = data_offset + data_size; | |
1197 | ||
55b44629 | 1198 | progress_next = file_size / 16; |
55b44629 | 1199 | |
35d48ddf | 1200 | mmap_size = MMAP_SIZE; |
55b44629 TG |
1201 | if (mmap_size > file_size) |
1202 | mmap_size = file_size; | |
1203 | ||
fe174207 TG |
1204 | memset(mmaps, 0, sizeof(mmaps)); |
1205 | ||
ba21594c ACM |
1206 | mmap_prot = PROT_READ; |
1207 | mmap_flags = MAP_SHARED; | |
1208 | ||
0331ee0c | 1209 | if (session->header.needs_swap) { |
ba21594c ACM |
1210 | mmap_prot |= PROT_WRITE; |
1211 | mmap_flags = MAP_PRIVATE; | |
1212 | } | |
06aae590 | 1213 | remap: |
55b44629 TG |
1214 | buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, |
1215 | file_offset); | |
06aae590 ACM |
1216 | if (buf == MAP_FAILED) { |
1217 | pr_err("failed to mmap file\n"); | |
1218 | err = -errno; | |
1219 | goto out_err; | |
1220 | } | |
fe174207 TG |
1221 | mmaps[map_idx] = buf; |
1222 | map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); | |
d6513281 | 1223 | file_pos = file_offset + head; |
06aae590 ACM |
1224 | |
1225 | more: | |
998bedc8 FW |
1226 | event = fetch_mmaped_event(session, head, mmap_size, buf); |
1227 | if (!event) { | |
fe174207 TG |
1228 | if (mmaps[map_idx]) { |
1229 | munmap(mmaps[map_idx], mmap_size); | |
1230 | mmaps[map_idx] = NULL; | |
1231 | } | |
06aae590 | 1232 | |
0331ee0c TG |
1233 | page_offset = page_size * (head / page_size); |
1234 | file_offset += page_offset; | |
1235 | head -= page_offset; | |
06aae590 ACM |
1236 | goto remap; |
1237 | } | |
1238 | ||
1239 | size = event->header.size; | |
1240 | ||
d6513281 | 1241 | if (size == 0 || |
45694aa7 | 1242 | perf_session__process_event(session, event, tool, file_pos) < 0) { |
9389a460 JO |
1243 | pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", |
1244 | file_offset + head, event->header.size, | |
1245 | event->header.type); | |
1246 | err = -EINVAL; | |
1247 | goto out_err; | |
06aae590 ACM |
1248 | } |
1249 | ||
1250 | head += size; | |
d6513281 | 1251 | file_pos += size; |
06aae590 | 1252 | |
55b44629 TG |
1253 | if (file_pos >= progress_next) { |
1254 | progress_next += file_size / 16; | |
ca59bcbc ACM |
1255 | ui_progress__update(file_pos, file_size, |
1256 | "Processing events..."); | |
55b44629 TG |
1257 | } |
1258 | ||
d6513281 | 1259 | if (file_pos < file_size) |
06aae590 | 1260 | goto more; |
d6513281 | 1261 | |
06aae590 | 1262 | err = 0; |
c61e52ee | 1263 | /* do the final flush for ordered samples */ |
0331ee0c | 1264 | session->ordered_samples.next_flush = ULLONG_MAX; |
d25380cd | 1265 | err = flush_sample_queue(session, tool); |
06aae590 | 1266 | out_err: |
a5580f3e | 1267 | ui_progress__finish(); |
45694aa7 | 1268 | perf_session__warn_about_errors(session, tool); |
020bb75a | 1269 | perf_session_free_sample_buffers(session); |
06aae590 ACM |
1270 | return err; |
1271 | } | |
27295592 | 1272 | |
6122e4e4 | 1273 | int perf_session__process_events(struct perf_session *self, |
45694aa7 | 1274 | struct perf_tool *tool) |
6122e4e4 ACM |
1275 | { |
1276 | int err; | |
1277 | ||
1278 | if (perf_session__register_idle_thread(self) == NULL) | |
1279 | return -ENOMEM; | |
1280 | ||
8dc58101 TZ |
1281 | if (!self->fd_pipe) |
1282 | err = __perf_session__process_events(self, | |
1283 | self->header.data_offset, | |
1284 | self->header.data_size, | |
45694aa7 | 1285 | self->size, tool); |
8dc58101 | 1286 | else |
45694aa7 | 1287 | err = __perf_session__process_pipe_events(self, tool); |
88ca895d | 1288 | |
6122e4e4 ACM |
1289 | return err; |
1290 | } | |
1291 | ||
7f3be652 | 1292 | bool perf_session__has_traces(struct perf_session *session, const char *msg) |
27295592 | 1293 | { |
7f3be652 | 1294 | if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) { |
d549c769 ACM |
1295 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
1296 | return false; | |
27295592 ACM |
1297 | } |
1298 | ||
d549c769 | 1299 | return true; |
27295592 | 1300 | } |
56b03f3c | 1301 | |
743eb868 ACM |
1302 | int maps__set_kallsyms_ref_reloc_sym(struct map **maps, |
1303 | const char *symbol_name, u64 addr) | |
56b03f3c ACM |
1304 | { |
1305 | char *bracket; | |
9de89fe7 | 1306 | enum map_type i; |
a1645ce1 ZY |
1307 | struct ref_reloc_sym *ref; |
1308 | ||
1309 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
1310 | if (ref == NULL) | |
1311 | return -ENOMEM; | |
56b03f3c | 1312 | |
a1645ce1 ZY |
1313 | ref->name = strdup(symbol_name); |
1314 | if (ref->name == NULL) { | |
1315 | free(ref); | |
56b03f3c | 1316 | return -ENOMEM; |
a1645ce1 | 1317 | } |
56b03f3c | 1318 | |
a1645ce1 | 1319 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
1320 | if (bracket) |
1321 | *bracket = '\0'; | |
1322 | ||
a1645ce1 | 1323 | ref->addr = addr; |
9de89fe7 ACM |
1324 | |
1325 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
1326 | struct kmap *kmap = map__kmap(maps[i]); |
1327 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
1328 | } |
1329 | ||
56b03f3c ACM |
1330 | return 0; |
1331 | } | |
1f626bc3 ACM |
1332 | |
1333 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
1334 | { | |
876650e6 | 1335 | return machines__fprintf_dsos(&self->machines, fp); |
1f626bc3 | 1336 | } |
f869097e ACM |
1337 | |
1338 | size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, | |
417c2ff6 | 1339 | bool (skip)(struct dso *dso, int parm), int parm) |
f869097e | 1340 | { |
876650e6 | 1341 | return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); |
f869097e | 1342 | } |
e248de33 ACM |
1343 | |
1344 | size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) | |
1345 | { | |
1346 | struct perf_evsel *pos; | |
1347 | size_t ret = fprintf(fp, "Aggregated stats:\n"); | |
1348 | ||
28a6b6aa | 1349 | ret += events_stats__fprintf(&session->stats, fp); |
e248de33 ACM |
1350 | |
1351 | list_for_each_entry(pos, &session->evlist->entries, node) { | |
7289f83c | 1352 | ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); |
52168eea | 1353 | ret += events_stats__fprintf(&pos->hists.stats, fp); |
e248de33 ACM |
1354 | } |
1355 | ||
1356 | return ret; | |
1357 | } | |
c0230b2b | 1358 | |
b424eba2 ACM |
1359 | size_t perf_session__fprintf(struct perf_session *session, FILE *fp) |
1360 | { | |
1361 | /* | |
1362 | * FIXME: Here we have to actually print all the machines in this | |
1363 | * session, not just the host... | |
1364 | */ | |
876650e6 | 1365 | return machine__fprintf(&session->machines.host, fp); |
b424eba2 ACM |
1366 | } |
1367 | ||
1368 | void perf_session__remove_thread(struct perf_session *session, | |
1369 | struct thread *th) | |
1370 | { | |
1371 | /* | |
1372 | * FIXME: This one makes no sense, we need to remove the thread from | |
1373 | * the machine it belongs to, perf_session can have many machines, so | |
876650e6 | 1374 | * doing it always on ->machines.host is wrong. Fix when auditing all |
b424eba2 ACM |
1375 | * the 'perf kvm' code. |
1376 | */ | |
876650e6 | 1377 | machine__remove_thread(&session->machines.host, th); |
b424eba2 ACM |
1378 | } |
1379 | ||
9cbdb702 DA |
1380 | struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, |
1381 | unsigned int type) | |
1382 | { | |
1383 | struct perf_evsel *pos; | |
1384 | ||
1385 | list_for_each_entry(pos, &session->evlist->entries, node) { | |
1386 | if (pos->attr.type == type) | |
1387 | return pos; | |
1388 | } | |
1389 | return NULL; | |
1390 | } | |
1391 | ||
71ad0f5e JO |
1392 | void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, |
1393 | struct perf_sample *sample, struct machine *machine, | |
1394 | int print_sym, int print_dso, int print_symoffset) | |
c0230b2b DA |
1395 | { |
1396 | struct addr_location al; | |
c0230b2b DA |
1397 | struct callchain_cursor_node *node; |
1398 | ||
743eb868 | 1399 | if (perf_event__preprocess_sample(event, machine, &al, sample, |
c0230b2b DA |
1400 | NULL) < 0) { |
1401 | error("problem processing %d event, skipping it.\n", | |
1402 | event->header.type); | |
1403 | return; | |
1404 | } | |
1405 | ||
1406 | if (symbol_conf.use_callchain && sample->callchain) { | |
1407 | ||
71ad0f5e JO |
1408 | |
1409 | if (machine__resolve_callchain(machine, evsel, al.thread, | |
1410 | sample, NULL) != 0) { | |
c0230b2b DA |
1411 | if (verbose) |
1412 | error("Failed to resolve callchain. Skipping\n"); | |
1413 | return; | |
1414 | } | |
47260645 | 1415 | callchain_cursor_commit(&callchain_cursor); |
c0230b2b DA |
1416 | |
1417 | while (1) { | |
47260645 | 1418 | node = callchain_cursor_current(&callchain_cursor); |
c0230b2b DA |
1419 | if (!node) |
1420 | break; | |
1421 | ||
787bef17 DA |
1422 | printf("\t%16" PRIx64, node->ip); |
1423 | if (print_sym) { | |
547a92e0 AN |
1424 | printf(" "); |
1425 | symbol__fprintf_symname(node->sym, stdout); | |
610723f2 DA |
1426 | } |
1427 | if (print_dso) { | |
547a92e0 | 1428 | printf(" ("); |
52deff71 | 1429 | map__fprintf_dsoname(node->map, stdout); |
547a92e0 | 1430 | printf(")"); |
787bef17 DA |
1431 | } |
1432 | printf("\n"); | |
c0230b2b | 1433 | |
47260645 | 1434 | callchain_cursor_advance(&callchain_cursor); |
c0230b2b DA |
1435 | } |
1436 | ||
1437 | } else { | |
adc4bf99 | 1438 | printf("%16" PRIx64, sample->ip); |
787bef17 | 1439 | if (print_sym) { |
547a92e0 | 1440 | printf(" "); |
a978f2ab AN |
1441 | if (print_symoffset) |
1442 | symbol__fprintf_symname_offs(al.sym, &al, | |
1443 | stdout); | |
1444 | else | |
1445 | symbol__fprintf_symname(al.sym, stdout); | |
610723f2 DA |
1446 | } |
1447 | ||
1448 | if (print_dso) { | |
547a92e0 AN |
1449 | printf(" ("); |
1450 | map__fprintf_dsoname(al.map, stdout); | |
1451 | printf(")"); | |
787bef17 | 1452 | } |
c0230b2b DA |
1453 | } |
1454 | } | |
5d67be97 AB |
1455 | |
1456 | int perf_session__cpu_bitmap(struct perf_session *session, | |
1457 | const char *cpu_list, unsigned long *cpu_bitmap) | |
1458 | { | |
1459 | int i; | |
1460 | struct cpu_map *map; | |
1461 | ||
1462 | for (i = 0; i < PERF_TYPE_MAX; ++i) { | |
1463 | struct perf_evsel *evsel; | |
1464 | ||
1465 | evsel = perf_session__find_first_evtype(session, i); | |
1466 | if (!evsel) | |
1467 | continue; | |
1468 | ||
1469 | if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { | |
1470 | pr_err("File does not contain CPU events. " | |
1471 | "Remove -c option to proceed.\n"); | |
1472 | return -1; | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | map = cpu_map__new(cpu_list); | |
47fbe53b DA |
1477 | if (map == NULL) { |
1478 | pr_err("Invalid cpu_list\n"); | |
1479 | return -1; | |
1480 | } | |
5d67be97 AB |
1481 | |
1482 | for (i = 0; i < map->nr; i++) { | |
1483 | int cpu = map->map[i]; | |
1484 | ||
1485 | if (cpu >= MAX_NR_CPUS) { | |
1486 | pr_err("Requested CPU %d too large. " | |
1487 | "Consider raising MAX_NR_CPUS\n", cpu); | |
1488 | return -1; | |
1489 | } | |
1490 | ||
1491 | set_bit(cpu, cpu_bitmap); | |
1492 | } | |
1493 | ||
1494 | return 0; | |
1495 | } | |
fbe96f29 SE |
1496 | |
1497 | void perf_session__fprintf_info(struct perf_session *session, FILE *fp, | |
1498 | bool full) | |
1499 | { | |
1500 | struct stat st; | |
1501 | int ret; | |
1502 | ||
1503 | if (session == NULL || fp == NULL) | |
1504 | return; | |
1505 | ||
1506 | ret = fstat(session->fd, &st); | |
1507 | if (ret == -1) | |
1508 | return; | |
1509 | ||
1510 | fprintf(fp, "# ========\n"); | |
1511 | fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); | |
1512 | perf_header__fprintf_info(session, fp, full); | |
1513 | fprintf(fp, "# ========\n#\n"); | |
1514 | } | |
da378962 ACM |
1515 | |
1516 | ||
1517 | int __perf_session__set_tracepoints_handlers(struct perf_session *session, | |
1518 | const struct perf_evsel_str_handler *assocs, | |
1519 | size_t nr_assocs) | |
1520 | { | |
1521 | struct perf_evlist *evlist = session->evlist; | |
1522 | struct event_format *format; | |
1523 | struct perf_evsel *evsel; | |
1524 | char *tracepoint, *name; | |
1525 | size_t i; | |
1526 | int err; | |
1527 | ||
1528 | for (i = 0; i < nr_assocs; i++) { | |
1529 | err = -ENOMEM; | |
1530 | tracepoint = strdup(assocs[i].name); | |
1531 | if (tracepoint == NULL) | |
1532 | goto out; | |
1533 | ||
1534 | err = -ENOENT; | |
1535 | name = strchr(tracepoint, ':'); | |
1536 | if (name == NULL) | |
1537 | goto out_free; | |
1538 | ||
1539 | *name++ = '\0'; | |
1540 | format = pevent_find_event_by_name(session->pevent, | |
1541 | tracepoint, name); | |
1542 | if (format == NULL) { | |
1543 | /* | |
1544 | * Adding a handler for an event not in the session, | |
1545 | * just ignore it. | |
1546 | */ | |
1547 | goto next; | |
1548 | } | |
1549 | ||
1550 | evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id); | |
1551 | if (evsel == NULL) | |
1552 | goto next; | |
1553 | ||
1554 | err = -EEXIST; | |
1555 | if (evsel->handler.func != NULL) | |
1556 | goto out_free; | |
1557 | evsel->handler.func = assocs[i].handler; | |
1558 | next: | |
1559 | free(tracepoint); | |
1560 | } | |
1561 | ||
1562 | err = 0; | |
1563 | out: | |
1564 | return err; | |
1565 | ||
1566 | out_free: | |
1567 | free(tracepoint); | |
1568 | goto out; | |
1569 | } |