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Commit | Line | Data |
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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 | ||
89 | session->host_machine.id_hdr_size = id_hdr_size; | |
90 | machines__set_id_hdr_size(&session->machines, id_hdr_size); | |
9c90a61c ACM |
91 | } |
92 | ||
a1645ce1 ZY |
93 | int perf_session__create_kernel_maps(struct perf_session *self) |
94 | { | |
d118f8ba | 95 | int ret = machine__create_kernel_maps(&self->host_machine); |
a1645ce1 | 96 | |
a1645ce1 | 97 | if (ret >= 0) |
d118f8ba | 98 | ret = machines__create_guest_kernel_maps(&self->machines); |
a1645ce1 ZY |
99 | return ret; |
100 | } | |
101 | ||
076c6e45 ACM |
102 | static void perf_session__destroy_kernel_maps(struct perf_session *self) |
103 | { | |
104 | machine__destroy_kernel_maps(&self->host_machine); | |
105 | machines__destroy_guest_kernel_maps(&self->machines); | |
106 | } | |
107 | ||
21ef97f0 IM |
108 | struct perf_session *perf_session__new(const char *filename, int mode, |
109 | bool force, bool repipe, | |
45694aa7 | 110 | struct perf_tool *tool) |
94c744b6 | 111 | { |
efad1415 RR |
112 | struct perf_session *self; |
113 | struct stat st; | |
114 | size_t len; | |
115 | ||
116 | if (!filename || !strlen(filename)) { | |
117 | if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) | |
118 | filename = "-"; | |
119 | else | |
120 | filename = "perf.data"; | |
121 | } | |
122 | ||
123 | len = strlen(filename); | |
124 | self = zalloc(sizeof(*self) + len); | |
94c744b6 ACM |
125 | |
126 | if (self == NULL) | |
127 | goto out; | |
128 | ||
94c744b6 | 129 | memcpy(self->filename, filename, len); |
23346f21 | 130 | self->machines = RB_ROOT; |
454c407e | 131 | self->repipe = repipe; |
a1225dec | 132 | INIT_LIST_HEAD(&self->ordered_samples.samples); |
020bb75a | 133 | INIT_LIST_HEAD(&self->ordered_samples.sample_cache); |
5c891f38 | 134 | INIT_LIST_HEAD(&self->ordered_samples.to_free); |
1f626bc3 | 135 | machine__init(&self->host_machine, "", HOST_KERNEL_ID); |
4bf9ce1b | 136 | hists__init(&self->hists); |
94c744b6 | 137 | |
64abebf7 ACM |
138 | if (mode == O_RDONLY) { |
139 | if (perf_session__open(self, force) < 0) | |
140 | goto out_delete; | |
7b56cce2 | 141 | perf_session__set_id_hdr_size(self); |
64abebf7 ACM |
142 | } else if (mode == O_WRONLY) { |
143 | /* | |
144 | * In O_RDONLY mode this will be performed when reading the | |
8115d60c | 145 | * kernel MMAP event, in perf_event__process_mmap(). |
64abebf7 ACM |
146 | */ |
147 | if (perf_session__create_kernel_maps(self) < 0) | |
148 | goto out_delete; | |
149 | } | |
d549c769 | 150 | |
45694aa7 | 151 | if (tool && tool->ordering_requires_timestamps && |
5e562474 | 152 | tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) { |
21ef97f0 | 153 | dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); |
45694aa7 | 154 | tool->ordered_samples = false; |
21ef97f0 IM |
155 | } |
156 | ||
94c744b6 ACM |
157 | out: |
158 | return self; | |
4aa65636 ACM |
159 | out_delete: |
160 | perf_session__delete(self); | |
161 | return NULL; | |
94c744b6 ACM |
162 | } |
163 | ||
b424eba2 ACM |
164 | static void perf_session__delete_dead_threads(struct perf_session *session) |
165 | { | |
166 | machine__delete_dead_threads(&session->host_machine); | |
167 | } | |
168 | ||
b424eba2 ACM |
169 | static void perf_session__delete_threads(struct perf_session *session) |
170 | { | |
171 | machine__delete_threads(&session->host_machine); | |
172 | } | |
173 | ||
03cd2094 NK |
174 | static void perf_session_env__delete(struct perf_session_env *env) |
175 | { | |
176 | free(env->hostname); | |
177 | free(env->os_release); | |
178 | free(env->version); | |
179 | free(env->arch); | |
180 | free(env->cpu_desc); | |
181 | free(env->cpuid); | |
182 | ||
183 | free(env->cmdline); | |
184 | free(env->sibling_cores); | |
185 | free(env->sibling_threads); | |
186 | free(env->numa_nodes); | |
187 | free(env->pmu_mappings); | |
188 | } | |
189 | ||
94c744b6 ACM |
190 | void perf_session__delete(struct perf_session *self) |
191 | { | |
076c6e45 | 192 | perf_session__destroy_kernel_maps(self); |
d65a458b ACM |
193 | perf_session__delete_dead_threads(self); |
194 | perf_session__delete_threads(self); | |
03cd2094 | 195 | perf_session_env__delete(&self->header.env); |
d65a458b | 196 | machine__exit(&self->host_machine); |
94c744b6 ACM |
197 | close(self->fd); |
198 | free(self); | |
7dbf4dcf | 199 | vdso__exit(); |
94c744b6 | 200 | } |
a328626b | 201 | |
1d037ca1 IT |
202 | static int process_event_synth_tracing_data_stub(union perf_event *event |
203 | __maybe_unused, | |
204 | struct perf_session *session | |
205 | __maybe_unused) | |
d20deb64 ACM |
206 | { |
207 | dump_printf(": unhandled!\n"); | |
208 | return 0; | |
209 | } | |
210 | ||
1d037ca1 IT |
211 | static int process_event_synth_attr_stub(union perf_event *event __maybe_unused, |
212 | struct perf_evlist **pevlist | |
213 | __maybe_unused) | |
10d0f086 ACM |
214 | { |
215 | dump_printf(": unhandled!\n"); | |
216 | return 0; | |
217 | } | |
218 | ||
1d037ca1 IT |
219 | static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, |
220 | union perf_event *event __maybe_unused, | |
221 | struct perf_sample *sample __maybe_unused, | |
222 | struct perf_evsel *evsel __maybe_unused, | |
223 | struct machine *machine __maybe_unused) | |
9e69c210 ACM |
224 | { |
225 | dump_printf(": unhandled!\n"); | |
226 | return 0; | |
227 | } | |
228 | ||
1d037ca1 IT |
229 | static int process_event_stub(struct perf_tool *tool __maybe_unused, |
230 | union perf_event *event __maybe_unused, | |
231 | struct perf_sample *sample __maybe_unused, | |
232 | struct machine *machine __maybe_unused) | |
06aae590 ACM |
233 | { |
234 | dump_printf(": unhandled!\n"); | |
235 | return 0; | |
236 | } | |
237 | ||
1d037ca1 IT |
238 | static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, |
239 | union perf_event *event __maybe_unused, | |
240 | struct perf_session *perf_session | |
241 | __maybe_unused) | |
743eb868 ACM |
242 | { |
243 | dump_printf(": unhandled!\n"); | |
244 | return 0; | |
245 | } | |
246 | ||
1d037ca1 IT |
247 | static int process_event_type_stub(struct perf_tool *tool __maybe_unused, |
248 | union perf_event *event __maybe_unused) | |
d6b17beb FW |
249 | { |
250 | dump_printf(": unhandled!\n"); | |
251 | return 0; | |
252 | } | |
253 | ||
45694aa7 | 254 | static int process_finished_round(struct perf_tool *tool, |
d20deb64 ACM |
255 | union perf_event *event, |
256 | struct perf_session *session); | |
d6b17beb | 257 | |
45694aa7 | 258 | static void perf_tool__fill_defaults(struct perf_tool *tool) |
06aae590 | 259 | { |
45694aa7 ACM |
260 | if (tool->sample == NULL) |
261 | tool->sample = process_event_sample_stub; | |
262 | if (tool->mmap == NULL) | |
263 | tool->mmap = process_event_stub; | |
264 | if (tool->comm == NULL) | |
265 | tool->comm = process_event_stub; | |
266 | if (tool->fork == NULL) | |
267 | tool->fork = process_event_stub; | |
268 | if (tool->exit == NULL) | |
269 | tool->exit = process_event_stub; | |
270 | if (tool->lost == NULL) | |
271 | tool->lost = perf_event__process_lost; | |
272 | if (tool->read == NULL) | |
273 | tool->read = process_event_sample_stub; | |
274 | if (tool->throttle == NULL) | |
275 | tool->throttle = process_event_stub; | |
276 | if (tool->unthrottle == NULL) | |
277 | tool->unthrottle = process_event_stub; | |
278 | if (tool->attr == NULL) | |
279 | tool->attr = process_event_synth_attr_stub; | |
280 | if (tool->event_type == NULL) | |
281 | tool->event_type = process_event_type_stub; | |
282 | if (tool->tracing_data == NULL) | |
283 | tool->tracing_data = process_event_synth_tracing_data_stub; | |
284 | if (tool->build_id == NULL) | |
285 | tool->build_id = process_finished_round_stub; | |
286 | if (tool->finished_round == NULL) { | |
287 | if (tool->ordered_samples) | |
288 | tool->finished_round = process_finished_round; | |
d6b17beb | 289 | else |
45694aa7 | 290 | tool->finished_round = process_finished_round_stub; |
d6b17beb | 291 | } |
06aae590 | 292 | } |
80c0120a DA |
293 | |
294 | void mem_bswap_32(void *src, int byte_size) | |
295 | { | |
296 | u32 *m = src; | |
297 | while (byte_size > 0) { | |
298 | *m = bswap_32(*m); | |
299 | byte_size -= sizeof(u32); | |
300 | ++m; | |
301 | } | |
302 | } | |
06aae590 | 303 | |
ba21594c ACM |
304 | void mem_bswap_64(void *src, int byte_size) |
305 | { | |
306 | u64 *m = src; | |
307 | ||
308 | while (byte_size > 0) { | |
309 | *m = bswap_64(*m); | |
310 | byte_size -= sizeof(u64); | |
311 | ++m; | |
312 | } | |
313 | } | |
314 | ||
268fb20f JO |
315 | static void swap_sample_id_all(union perf_event *event, void *data) |
316 | { | |
317 | void *end = (void *) event + event->header.size; | |
318 | int size = end - data; | |
319 | ||
320 | BUG_ON(size % sizeof(u64)); | |
321 | mem_bswap_64(data, size); | |
322 | } | |
323 | ||
324 | static void perf_event__all64_swap(union perf_event *event, | |
1d037ca1 | 325 | bool sample_id_all __maybe_unused) |
ba21594c | 326 | { |
8115d60c ACM |
327 | struct perf_event_header *hdr = &event->header; |
328 | mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); | |
ba21594c ACM |
329 | } |
330 | ||
268fb20f | 331 | static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) |
ba21594c | 332 | { |
8115d60c ACM |
333 | event->comm.pid = bswap_32(event->comm.pid); |
334 | event->comm.tid = bswap_32(event->comm.tid); | |
268fb20f JO |
335 | |
336 | if (sample_id_all) { | |
337 | void *data = &event->comm.comm; | |
338 | ||
9ac3e487 | 339 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
268fb20f JO |
340 | swap_sample_id_all(event, data); |
341 | } | |
ba21594c ACM |
342 | } |
343 | ||
268fb20f JO |
344 | static void perf_event__mmap_swap(union perf_event *event, |
345 | bool sample_id_all) | |
ba21594c | 346 | { |
8115d60c ACM |
347 | event->mmap.pid = bswap_32(event->mmap.pid); |
348 | event->mmap.tid = bswap_32(event->mmap.tid); | |
349 | event->mmap.start = bswap_64(event->mmap.start); | |
350 | event->mmap.len = bswap_64(event->mmap.len); | |
351 | event->mmap.pgoff = bswap_64(event->mmap.pgoff); | |
268fb20f JO |
352 | |
353 | if (sample_id_all) { | |
354 | void *data = &event->mmap.filename; | |
355 | ||
9ac3e487 | 356 | data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); |
268fb20f JO |
357 | swap_sample_id_all(event, data); |
358 | } | |
ba21594c ACM |
359 | } |
360 | ||
268fb20f | 361 | static void perf_event__task_swap(union perf_event *event, bool sample_id_all) |
ba21594c | 362 | { |
8115d60c ACM |
363 | event->fork.pid = bswap_32(event->fork.pid); |
364 | event->fork.tid = bswap_32(event->fork.tid); | |
365 | event->fork.ppid = bswap_32(event->fork.ppid); | |
366 | event->fork.ptid = bswap_32(event->fork.ptid); | |
367 | event->fork.time = bswap_64(event->fork.time); | |
268fb20f JO |
368 | |
369 | if (sample_id_all) | |
370 | swap_sample_id_all(event, &event->fork + 1); | |
ba21594c ACM |
371 | } |
372 | ||
268fb20f | 373 | static void perf_event__read_swap(union perf_event *event, bool sample_id_all) |
ba21594c | 374 | { |
8115d60c ACM |
375 | event->read.pid = bswap_32(event->read.pid); |
376 | event->read.tid = bswap_32(event->read.tid); | |
377 | event->read.value = bswap_64(event->read.value); | |
378 | event->read.time_enabled = bswap_64(event->read.time_enabled); | |
379 | event->read.time_running = bswap_64(event->read.time_running); | |
380 | event->read.id = bswap_64(event->read.id); | |
268fb20f JO |
381 | |
382 | if (sample_id_all) | |
383 | swap_sample_id_all(event, &event->read + 1); | |
ba21594c ACM |
384 | } |
385 | ||
e108c66e JO |
386 | static u8 revbyte(u8 b) |
387 | { | |
388 | int rev = (b >> 4) | ((b & 0xf) << 4); | |
389 | rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); | |
390 | rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); | |
391 | return (u8) rev; | |
392 | } | |
393 | ||
394 | /* | |
395 | * XXX this is hack in attempt to carry flags bitfield | |
396 | * throught endian village. ABI says: | |
397 | * | |
398 | * Bit-fields are allocated from right to left (least to most significant) | |
399 | * on little-endian implementations and from left to right (most to least | |
400 | * significant) on big-endian implementations. | |
401 | * | |
402 | * The above seems to be byte specific, so we need to reverse each | |
403 | * byte of the bitfield. 'Internet' also says this might be implementation | |
404 | * specific and we probably need proper fix and carry perf_event_attr | |
405 | * bitfield flags in separate data file FEAT_ section. Thought this seems | |
406 | * to work for now. | |
407 | */ | |
408 | static void swap_bitfield(u8 *p, unsigned len) | |
409 | { | |
410 | unsigned i; | |
411 | ||
412 | for (i = 0; i < len; i++) { | |
413 | *p = revbyte(*p); | |
414 | p++; | |
415 | } | |
416 | } | |
417 | ||
eda3913b DA |
418 | /* exported for swapping attributes in file header */ |
419 | void perf_event__attr_swap(struct perf_event_attr *attr) | |
420 | { | |
421 | attr->type = bswap_32(attr->type); | |
422 | attr->size = bswap_32(attr->size); | |
423 | attr->config = bswap_64(attr->config); | |
424 | attr->sample_period = bswap_64(attr->sample_period); | |
425 | attr->sample_type = bswap_64(attr->sample_type); | |
426 | attr->read_format = bswap_64(attr->read_format); | |
427 | attr->wakeup_events = bswap_32(attr->wakeup_events); | |
428 | attr->bp_type = bswap_32(attr->bp_type); | |
429 | attr->bp_addr = bswap_64(attr->bp_addr); | |
430 | attr->bp_len = bswap_64(attr->bp_len); | |
e108c66e JO |
431 | |
432 | swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); | |
eda3913b DA |
433 | } |
434 | ||
268fb20f | 435 | static void perf_event__hdr_attr_swap(union perf_event *event, |
1d037ca1 | 436 | bool sample_id_all __maybe_unused) |
2c46dbb5 TZ |
437 | { |
438 | size_t size; | |
439 | ||
eda3913b | 440 | perf_event__attr_swap(&event->attr.attr); |
2c46dbb5 | 441 | |
8115d60c ACM |
442 | size = event->header.size; |
443 | size -= (void *)&event->attr.id - (void *)event; | |
444 | mem_bswap_64(event->attr.id, size); | |
2c46dbb5 TZ |
445 | } |
446 | ||
268fb20f | 447 | static void perf_event__event_type_swap(union perf_event *event, |
1d037ca1 | 448 | bool sample_id_all __maybe_unused) |
cd19a035 | 449 | { |
8115d60c ACM |
450 | event->event_type.event_type.event_id = |
451 | bswap_64(event->event_type.event_type.event_id); | |
cd19a035 TZ |
452 | } |
453 | ||
268fb20f | 454 | static void perf_event__tracing_data_swap(union perf_event *event, |
1d037ca1 | 455 | bool sample_id_all __maybe_unused) |
9215545e | 456 | { |
8115d60c | 457 | event->tracing_data.size = bswap_32(event->tracing_data.size); |
9215545e TZ |
458 | } |
459 | ||
268fb20f JO |
460 | typedef void (*perf_event__swap_op)(union perf_event *event, |
461 | bool sample_id_all); | |
ba21594c | 462 | |
8115d60c ACM |
463 | static perf_event__swap_op perf_event__swap_ops[] = { |
464 | [PERF_RECORD_MMAP] = perf_event__mmap_swap, | |
465 | [PERF_RECORD_COMM] = perf_event__comm_swap, | |
466 | [PERF_RECORD_FORK] = perf_event__task_swap, | |
467 | [PERF_RECORD_EXIT] = perf_event__task_swap, | |
468 | [PERF_RECORD_LOST] = perf_event__all64_swap, | |
469 | [PERF_RECORD_READ] = perf_event__read_swap, | |
470 | [PERF_RECORD_SAMPLE] = perf_event__all64_swap, | |
eda3913b | 471 | [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, |
8115d60c ACM |
472 | [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, |
473 | [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, | |
474 | [PERF_RECORD_HEADER_BUILD_ID] = NULL, | |
475 | [PERF_RECORD_HEADER_MAX] = NULL, | |
ba21594c ACM |
476 | }; |
477 | ||
c61e52ee FW |
478 | struct sample_queue { |
479 | u64 timestamp; | |
e4c2df13 | 480 | u64 file_offset; |
8115d60c | 481 | union perf_event *event; |
c61e52ee FW |
482 | struct list_head list; |
483 | }; | |
484 | ||
020bb75a TG |
485 | static void perf_session_free_sample_buffers(struct perf_session *session) |
486 | { | |
487 | struct ordered_samples *os = &session->ordered_samples; | |
488 | ||
5c891f38 | 489 | while (!list_empty(&os->to_free)) { |
020bb75a TG |
490 | struct sample_queue *sq; |
491 | ||
5c891f38 | 492 | sq = list_entry(os->to_free.next, struct sample_queue, list); |
020bb75a TG |
493 | list_del(&sq->list); |
494 | free(sq); | |
495 | } | |
496 | } | |
497 | ||
cbf41645 | 498 | static int perf_session_deliver_event(struct perf_session *session, |
8115d60c | 499 | union perf_event *event, |
8d50e5b4 | 500 | struct perf_sample *sample, |
45694aa7 | 501 | struct perf_tool *tool, |
f74725dc | 502 | u64 file_offset); |
cbf41645 | 503 | |
d25380cd | 504 | static int flush_sample_queue(struct perf_session *s, |
45694aa7 | 505 | struct perf_tool *tool) |
c61e52ee | 506 | { |
a1225dec TG |
507 | struct ordered_samples *os = &s->ordered_samples; |
508 | struct list_head *head = &os->samples; | |
c61e52ee | 509 | struct sample_queue *tmp, *iter; |
8d50e5b4 | 510 | struct perf_sample sample; |
a1225dec TG |
511 | u64 limit = os->next_flush; |
512 | u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; | |
88660563 | 513 | unsigned idx = 0, progress_next = os->nr_samples / 16; |
5538beca | 514 | int ret; |
c61e52ee | 515 | |
45694aa7 | 516 | if (!tool->ordered_samples || !limit) |
d25380cd | 517 | return 0; |
c61e52ee FW |
518 | |
519 | list_for_each_entry_safe(iter, tmp, head, list) { | |
520 | if (iter->timestamp > limit) | |
a1225dec | 521 | break; |
c61e52ee | 522 | |
0807d2d8 | 523 | ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample); |
5538beca FW |
524 | if (ret) |
525 | pr_err("Can't parse sample, err = %d\n", ret); | |
d25380cd DA |
526 | else { |
527 | ret = perf_session_deliver_event(s, iter->event, &sample, tool, | |
528 | iter->file_offset); | |
529 | if (ret) | |
530 | return ret; | |
531 | } | |
c61e52ee | 532 | |
a1225dec | 533 | os->last_flush = iter->timestamp; |
c61e52ee | 534 | list_del(&iter->list); |
020bb75a | 535 | list_add(&iter->list, &os->sample_cache); |
88660563 ACM |
536 | if (++idx >= progress_next) { |
537 | progress_next += os->nr_samples / 16; | |
538 | ui_progress__update(idx, os->nr_samples, | |
539 | "Processing time ordered events..."); | |
540 | } | |
c61e52ee | 541 | } |
a1225dec TG |
542 | |
543 | if (list_empty(head)) { | |
544 | os->last_sample = NULL; | |
545 | } else if (last_ts <= limit) { | |
546 | os->last_sample = | |
547 | list_entry(head->prev, struct sample_queue, list); | |
548 | } | |
88660563 ACM |
549 | |
550 | os->nr_samples = 0; | |
d25380cd DA |
551 | |
552 | return 0; | |
c61e52ee FW |
553 | } |
554 | ||
d6b17beb FW |
555 | /* |
556 | * When perf record finishes a pass on every buffers, it records this pseudo | |
557 | * event. | |
558 | * We record the max timestamp t found in the pass n. | |
559 | * Assuming these timestamps are monotonic across cpus, we know that if | |
560 | * a buffer still has events with timestamps below t, they will be all | |
561 | * available and then read in the pass n + 1. | |
562 | * Hence when we start to read the pass n + 2, we can safely flush every | |
563 | * events with timestamps below t. | |
564 | * | |
565 | * ============ PASS n ================= | |
566 | * CPU 0 | CPU 1 | |
567 | * | | |
568 | * cnt1 timestamps | cnt2 timestamps | |
569 | * 1 | 2 | |
570 | * 2 | 3 | |
571 | * - | 4 <--- max recorded | |
572 | * | |
573 | * ============ PASS n + 1 ============== | |
574 | * CPU 0 | CPU 1 | |
575 | * | | |
576 | * cnt1 timestamps | cnt2 timestamps | |
577 | * 3 | 5 | |
578 | * 4 | 6 | |
579 | * 5 | 7 <---- max recorded | |
580 | * | |
581 | * Flush every events below timestamp 4 | |
582 | * | |
583 | * ============ PASS n + 2 ============== | |
584 | * CPU 0 | CPU 1 | |
585 | * | | |
586 | * cnt1 timestamps | cnt2 timestamps | |
587 | * 6 | 8 | |
588 | * 7 | 9 | |
589 | * - | 10 | |
590 | * | |
591 | * Flush every events below timestamp 7 | |
592 | * etc... | |
593 | */ | |
45694aa7 | 594 | static int process_finished_round(struct perf_tool *tool, |
1d037ca1 | 595 | union perf_event *event __maybe_unused, |
d20deb64 | 596 | struct perf_session *session) |
d6b17beb | 597 | { |
d25380cd DA |
598 | int ret = flush_sample_queue(session, tool); |
599 | if (!ret) | |
600 | session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; | |
d6b17beb | 601 | |
d25380cd | 602 | return ret; |
d6b17beb FW |
603 | } |
604 | ||
c61e52ee | 605 | /* The queue is ordered by time */ |
cbf41645 | 606 | static void __queue_event(struct sample_queue *new, struct perf_session *s) |
c61e52ee | 607 | { |
a1225dec TG |
608 | struct ordered_samples *os = &s->ordered_samples; |
609 | struct sample_queue *sample = os->last_sample; | |
610 | u64 timestamp = new->timestamp; | |
611 | struct list_head *p; | |
c61e52ee | 612 | |
88660563 | 613 | ++os->nr_samples; |
a1225dec | 614 | os->last_sample = new; |
c61e52ee | 615 | |
a1225dec TG |
616 | if (!sample) { |
617 | list_add(&new->list, &os->samples); | |
618 | os->max_timestamp = timestamp; | |
c61e52ee FW |
619 | return; |
620 | } | |
621 | ||
622 | /* | |
a1225dec TG |
623 | * last_sample might point to some random place in the list as it's |
624 | * the last queued event. We expect that the new event is close to | |
625 | * this. | |
c61e52ee | 626 | */ |
a1225dec TG |
627 | if (sample->timestamp <= timestamp) { |
628 | while (sample->timestamp <= timestamp) { | |
629 | p = sample->list.next; | |
630 | if (p == &os->samples) { | |
631 | list_add_tail(&new->list, &os->samples); | |
632 | os->max_timestamp = timestamp; | |
633 | return; | |
634 | } | |
635 | sample = list_entry(p, struct sample_queue, list); | |
636 | } | |
637 | list_add_tail(&new->list, &sample->list); | |
638 | } else { | |
639 | while (sample->timestamp > timestamp) { | |
640 | p = sample->list.prev; | |
641 | if (p == &os->samples) { | |
642 | list_add(&new->list, &os->samples); | |
643 | return; | |
644 | } | |
645 | sample = list_entry(p, struct sample_queue, list); | |
646 | } | |
647 | list_add(&new->list, &sample->list); | |
648 | } | |
c61e52ee FW |
649 | } |
650 | ||
5c891f38 TG |
651 | #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) |
652 | ||
8115d60c | 653 | static int perf_session_queue_event(struct perf_session *s, union perf_event *event, |
8d50e5b4 | 654 | struct perf_sample *sample, u64 file_offset) |
c61e52ee | 655 | { |
5c891f38 TG |
656 | struct ordered_samples *os = &s->ordered_samples; |
657 | struct list_head *sc = &os->sample_cache; | |
8d50e5b4 | 658 | u64 timestamp = sample->time; |
c61e52ee | 659 | struct sample_queue *new; |
c61e52ee | 660 | |
79a14c1f | 661 | if (!timestamp || timestamp == ~0ULL) |
cbf41645 TG |
662 | return -ETIME; |
663 | ||
c61e52ee FW |
664 | if (timestamp < s->ordered_samples.last_flush) { |
665 | printf("Warning: Timestamp below last timeslice flush\n"); | |
666 | return -EINVAL; | |
667 | } | |
668 | ||
020bb75a TG |
669 | if (!list_empty(sc)) { |
670 | new = list_entry(sc->next, struct sample_queue, list); | |
671 | list_del(&new->list); | |
5c891f38 TG |
672 | } else if (os->sample_buffer) { |
673 | new = os->sample_buffer + os->sample_buffer_idx; | |
674 | if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) | |
675 | os->sample_buffer = NULL; | |
020bb75a | 676 | } else { |
5c891f38 TG |
677 | os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); |
678 | if (!os->sample_buffer) | |
020bb75a | 679 | return -ENOMEM; |
5c891f38 TG |
680 | list_add(&os->sample_buffer->list, &os->to_free); |
681 | os->sample_buffer_idx = 2; | |
682 | new = os->sample_buffer + 1; | |
020bb75a | 683 | } |
c61e52ee FW |
684 | |
685 | new->timestamp = timestamp; | |
e4c2df13 | 686 | new->file_offset = file_offset; |
fe174207 | 687 | new->event = event; |
c61e52ee | 688 | |
cbf41645 | 689 | __queue_event(new, s); |
640c03ce | 690 | |
640c03ce ACM |
691 | return 0; |
692 | } | |
c61e52ee | 693 | |
8d50e5b4 | 694 | static void callchain__printf(struct perf_sample *sample) |
640c03ce ACM |
695 | { |
696 | unsigned int i; | |
c61e52ee | 697 | |
9486aa38 | 698 | printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); |
640c03ce ACM |
699 | |
700 | for (i = 0; i < sample->callchain->nr; i++) | |
9486aa38 ACM |
701 | printf("..... %2d: %016" PRIx64 "\n", |
702 | i, sample->callchain->ips[i]); | |
c61e52ee FW |
703 | } |
704 | ||
b5387528 RAV |
705 | static void branch_stack__printf(struct perf_sample *sample) |
706 | { | |
707 | uint64_t i; | |
708 | ||
709 | printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); | |
710 | ||
711 | for (i = 0; i < sample->branch_stack->nr; i++) | |
712 | printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", | |
713 | i, sample->branch_stack->entries[i].from, | |
714 | sample->branch_stack->entries[i].to); | |
715 | } | |
716 | ||
0f6a3015 JO |
717 | static void regs_dump__printf(u64 mask, u64 *regs) |
718 | { | |
719 | unsigned rid, i = 0; | |
720 | ||
721 | for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { | |
722 | u64 val = regs[i++]; | |
723 | ||
724 | printf(".... %-5s 0x%" PRIx64 "\n", | |
725 | perf_reg_name(rid), val); | |
726 | } | |
727 | } | |
728 | ||
729 | static void regs_user__printf(struct perf_sample *sample, u64 mask) | |
730 | { | |
731 | struct regs_dump *user_regs = &sample->user_regs; | |
732 | ||
733 | if (user_regs->regs) { | |
734 | printf("... user regs: mask 0x%" PRIx64 "\n", mask); | |
735 | regs_dump__printf(mask, user_regs->regs); | |
736 | } | |
737 | } | |
738 | ||
739 | static void stack_user__printf(struct stack_dump *dump) | |
740 | { | |
741 | printf("... ustack: size %" PRIu64 ", offset 0x%x\n", | |
742 | dump->size, dump->offset); | |
743 | } | |
744 | ||
9c90a61c | 745 | static void perf_session__print_tstamp(struct perf_session *session, |
8115d60c | 746 | union perf_event *event, |
8d50e5b4 | 747 | struct perf_sample *sample) |
9c90a61c | 748 | { |
7f3be652 ACM |
749 | u64 sample_type = perf_evlist__sample_type(session->evlist); |
750 | ||
9c90a61c | 751 | if (event->header.type != PERF_RECORD_SAMPLE && |
5e562474 | 752 | !perf_evlist__sample_id_all(session->evlist)) { |
9c90a61c ACM |
753 | fputs("-1 -1 ", stdout); |
754 | return; | |
755 | } | |
756 | ||
7f3be652 | 757 | if ((sample_type & PERF_SAMPLE_CPU)) |
9c90a61c ACM |
758 | printf("%u ", sample->cpu); |
759 | ||
7f3be652 | 760 | if (sample_type & PERF_SAMPLE_TIME) |
9486aa38 | 761 | printf("%" PRIu64 " ", sample->time); |
9c90a61c ACM |
762 | } |
763 | ||
8115d60c | 764 | static void dump_event(struct perf_session *session, union perf_event *event, |
8d50e5b4 | 765 | u64 file_offset, struct perf_sample *sample) |
9aefcab0 TG |
766 | { |
767 | if (!dump_trace) | |
768 | return; | |
769 | ||
9486aa38 ACM |
770 | printf("\n%#" PRIx64 " [%#x]: event: %d\n", |
771 | file_offset, event->header.size, event->header.type); | |
9aefcab0 TG |
772 | |
773 | trace_event(event); | |
774 | ||
775 | if (sample) | |
776 | perf_session__print_tstamp(session, event, sample); | |
777 | ||
9486aa38 | 778 | printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, |
8115d60c | 779 | event->header.size, perf_event__name(event->header.type)); |
9aefcab0 TG |
780 | } |
781 | ||
0f6a3015 | 782 | static void dump_sample(struct perf_evsel *evsel, union perf_event *event, |
8d50e5b4 | 783 | struct perf_sample *sample) |
9aefcab0 | 784 | { |
7f3be652 ACM |
785 | u64 sample_type; |
786 | ||
ddbc24b7 ACM |
787 | if (!dump_trace) |
788 | return; | |
789 | ||
7cec0922 | 790 | printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", |
9486aa38 | 791 | event->header.misc, sample->pid, sample->tid, sample->ip, |
7cec0922 | 792 | sample->period, sample->addr); |
9aefcab0 | 793 | |
0f6a3015 | 794 | sample_type = evsel->attr.sample_type; |
7f3be652 ACM |
795 | |
796 | if (sample_type & PERF_SAMPLE_CALLCHAIN) | |
ddbc24b7 | 797 | callchain__printf(sample); |
b5387528 | 798 | |
7f3be652 | 799 | if (sample_type & PERF_SAMPLE_BRANCH_STACK) |
b5387528 | 800 | branch_stack__printf(sample); |
0f6a3015 JO |
801 | |
802 | if (sample_type & PERF_SAMPLE_REGS_USER) | |
803 | regs_user__printf(sample, evsel->attr.sample_regs_user); | |
804 | ||
805 | if (sample_type & PERF_SAMPLE_STACK_USER) | |
806 | stack_user__printf(&sample->user_stack); | |
9aefcab0 TG |
807 | } |
808 | ||
743eb868 ACM |
809 | static struct machine * |
810 | perf_session__find_machine_for_cpumode(struct perf_session *session, | |
811 | union perf_event *event) | |
812 | { | |
813 | const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
814 | ||
7c0f4a41 DA |
815 | if (perf_guest && |
816 | ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || | |
817 | (cpumode == PERF_RECORD_MISC_GUEST_USER))) { | |
7fb0a5ee ND |
818 | u32 pid; |
819 | ||
820 | if (event->header.type == PERF_RECORD_MMAP) | |
821 | pid = event->mmap.pid; | |
822 | else | |
823 | pid = event->ip.pid; | |
824 | ||
207b5792 | 825 | return perf_session__findnew_machine(session, pid); |
7fb0a5ee | 826 | } |
743eb868 ACM |
827 | |
828 | return perf_session__find_host_machine(session); | |
829 | } | |
830 | ||
cbf41645 | 831 | static int perf_session_deliver_event(struct perf_session *session, |
8115d60c | 832 | union perf_event *event, |
8d50e5b4 | 833 | struct perf_sample *sample, |
45694aa7 | 834 | struct perf_tool *tool, |
532e7269 | 835 | u64 file_offset) |
cbf41645 | 836 | { |
9e69c210 | 837 | struct perf_evsel *evsel; |
743eb868 | 838 | struct machine *machine; |
9e69c210 | 839 | |
532e7269 TG |
840 | dump_event(session, event, file_offset, sample); |
841 | ||
7b27509f ACM |
842 | evsel = perf_evlist__id2evsel(session->evlist, sample->id); |
843 | if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { | |
844 | /* | |
845 | * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here | |
846 | * because the tools right now may apply filters, discarding | |
847 | * some of the samples. For consistency, in the future we | |
848 | * should have something like nr_filtered_samples and remove | |
849 | * the sample->period from total_sample_period, etc, KISS for | |
850 | * now tho. | |
851 | * | |
852 | * Also testing against NULL allows us to handle files without | |
853 | * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the | |
854 | * future probably it'll be a good idea to restrict event | |
855 | * processing via perf_session to files with both set. | |
856 | */ | |
857 | hists__inc_nr_events(&evsel->hists, event->header.type); | |
858 | } | |
859 | ||
743eb868 ACM |
860 | machine = perf_session__find_machine_for_cpumode(session, event); |
861 | ||
cbf41645 TG |
862 | switch (event->header.type) { |
863 | case PERF_RECORD_SAMPLE: | |
0f6a3015 | 864 | dump_sample(evsel, event, sample); |
9e69c210 ACM |
865 | if (evsel == NULL) { |
866 | ++session->hists.stats.nr_unknown_id; | |
6782206b | 867 | return 0; |
9e69c210 | 868 | } |
0c095715 JR |
869 | if (machine == NULL) { |
870 | ++session->hists.stats.nr_unprocessable_samples; | |
6782206b | 871 | return 0; |
0c095715 | 872 | } |
45694aa7 | 873 | return tool->sample(tool, event, sample, evsel, machine); |
cbf41645 | 874 | case PERF_RECORD_MMAP: |
45694aa7 | 875 | return tool->mmap(tool, event, sample, machine); |
cbf41645 | 876 | case PERF_RECORD_COMM: |
45694aa7 | 877 | return tool->comm(tool, event, sample, machine); |
cbf41645 | 878 | case PERF_RECORD_FORK: |
45694aa7 | 879 | return tool->fork(tool, event, sample, machine); |
cbf41645 | 880 | case PERF_RECORD_EXIT: |
45694aa7 | 881 | return tool->exit(tool, event, sample, machine); |
cbf41645 | 882 | case PERF_RECORD_LOST: |
45694aa7 | 883 | if (tool->lost == perf_event__process_lost) |
743eb868 | 884 | session->hists.stats.total_lost += event->lost.lost; |
45694aa7 | 885 | return tool->lost(tool, event, sample, machine); |
cbf41645 | 886 | case PERF_RECORD_READ: |
45694aa7 | 887 | return tool->read(tool, event, sample, evsel, machine); |
cbf41645 | 888 | case PERF_RECORD_THROTTLE: |
45694aa7 | 889 | return tool->throttle(tool, event, sample, machine); |
cbf41645 | 890 | case PERF_RECORD_UNTHROTTLE: |
45694aa7 | 891 | return tool->unthrottle(tool, event, sample, machine); |
cbf41645 TG |
892 | default: |
893 | ++session->hists.stats.nr_unknown_events; | |
894 | return -1; | |
895 | } | |
896 | } | |
897 | ||
3dfc2c0a | 898 | static int perf_session__preprocess_sample(struct perf_session *session, |
8115d60c | 899 | union perf_event *event, struct perf_sample *sample) |
3dfc2c0a TG |
900 | { |
901 | if (event->header.type != PERF_RECORD_SAMPLE || | |
7f3be652 | 902 | !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN)) |
3dfc2c0a TG |
903 | return 0; |
904 | ||
905 | if (!ip_callchain__valid(sample->callchain, event)) { | |
906 | pr_debug("call-chain problem with event, skipping it.\n"); | |
907 | ++session->hists.stats.nr_invalid_chains; | |
908 | session->hists.stats.total_invalid_chains += sample->period; | |
909 | return -EINVAL; | |
910 | } | |
911 | return 0; | |
912 | } | |
913 | ||
8115d60c | 914 | static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, |
45694aa7 | 915 | struct perf_tool *tool, u64 file_offset) |
06aae590 | 916 | { |
10d0f086 ACM |
917 | int err; |
918 | ||
ba74f064 | 919 | dump_event(session, event, file_offset, NULL); |
06aae590 | 920 | |
cbf41645 | 921 | /* These events are processed right away */ |
06aae590 | 922 | switch (event->header.type) { |
2c46dbb5 | 923 | case PERF_RECORD_HEADER_ATTR: |
45694aa7 | 924 | err = tool->attr(event, &session->evlist); |
10d0f086 | 925 | if (err == 0) |
7b56cce2 | 926 | perf_session__set_id_hdr_size(session); |
10d0f086 | 927 | return err; |
cd19a035 | 928 | case PERF_RECORD_HEADER_EVENT_TYPE: |
45694aa7 | 929 | return tool->event_type(tool, event); |
9215545e TZ |
930 | case PERF_RECORD_HEADER_TRACING_DATA: |
931 | /* setup for reading amidst mmap */ | |
cbf41645 | 932 | lseek(session->fd, file_offset, SEEK_SET); |
45694aa7 | 933 | return tool->tracing_data(event, session); |
c7929e47 | 934 | case PERF_RECORD_HEADER_BUILD_ID: |
45694aa7 | 935 | return tool->build_id(tool, event, session); |
d6b17beb | 936 | case PERF_RECORD_FINISHED_ROUND: |
45694aa7 | 937 | return tool->finished_round(tool, event, session); |
06aae590 | 938 | default: |
ba74f064 | 939 | return -EINVAL; |
06aae590 | 940 | } |
ba74f064 TG |
941 | } |
942 | ||
268fb20f JO |
943 | static void event_swap(union perf_event *event, bool sample_id_all) |
944 | { | |
945 | perf_event__swap_op swap; | |
946 | ||
947 | swap = perf_event__swap_ops[event->header.type]; | |
948 | if (swap) | |
949 | swap(event, sample_id_all); | |
950 | } | |
951 | ||
ba74f064 | 952 | static int perf_session__process_event(struct perf_session *session, |
8115d60c | 953 | union perf_event *event, |
45694aa7 | 954 | struct perf_tool *tool, |
ba74f064 TG |
955 | u64 file_offset) |
956 | { | |
8d50e5b4 | 957 | struct perf_sample sample; |
ba74f064 TG |
958 | int ret; |
959 | ||
268fb20f | 960 | if (session->header.needs_swap) |
5e562474 | 961 | event_swap(event, perf_evlist__sample_id_all(session->evlist)); |
ba74f064 TG |
962 | |
963 | if (event->header.type >= PERF_RECORD_HEADER_MAX) | |
964 | return -EINVAL; | |
965 | ||
966 | hists__inc_nr_events(&session->hists, event->header.type); | |
967 | ||
968 | if (event->header.type >= PERF_RECORD_USER_TYPE_START) | |
45694aa7 | 969 | return perf_session__process_user_event(session, event, tool, file_offset); |
cbf41645 | 970 | |
3dfc2c0a TG |
971 | /* |
972 | * For all kernel events we get the sample data | |
973 | */ | |
0807d2d8 | 974 | ret = perf_evlist__parse_sample(session->evlist, event, &sample); |
5538beca FW |
975 | if (ret) |
976 | return ret; | |
3dfc2c0a TG |
977 | |
978 | /* Preprocess sample records - precheck callchains */ | |
979 | if (perf_session__preprocess_sample(session, event, &sample)) | |
980 | return 0; | |
981 | ||
45694aa7 | 982 | if (tool->ordered_samples) { |
e4c2df13 TG |
983 | ret = perf_session_queue_event(session, event, &sample, |
984 | file_offset); | |
cbf41645 TG |
985 | if (ret != -ETIME) |
986 | return ret; | |
987 | } | |
988 | ||
45694aa7 | 989 | return perf_session_deliver_event(session, event, &sample, tool, |
f74725dc | 990 | file_offset); |
06aae590 ACM |
991 | } |
992 | ||
ba21594c ACM |
993 | void perf_event_header__bswap(struct perf_event_header *self) |
994 | { | |
995 | self->type = bswap_32(self->type); | |
996 | self->misc = bswap_16(self->misc); | |
997 | self->size = bswap_16(self->size); | |
998 | } | |
999 | ||
b424eba2 ACM |
1000 | struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) |
1001 | { | |
1002 | return machine__findnew_thread(&session->host_machine, pid); | |
1003 | } | |
1004 | ||
06aae590 ACM |
1005 | static struct thread *perf_session__register_idle_thread(struct perf_session *self) |
1006 | { | |
1007 | struct thread *thread = perf_session__findnew(self, 0); | |
1008 | ||
1009 | if (thread == NULL || thread__set_comm(thread, "swapper")) { | |
1010 | pr_err("problem inserting idle task.\n"); | |
1011 | thread = NULL; | |
1012 | } | |
1013 | ||
1014 | return thread; | |
1015 | } | |
1016 | ||
11095994 | 1017 | static void perf_session__warn_about_errors(const struct perf_session *session, |
45694aa7 | 1018 | const struct perf_tool *tool) |
11095994 | 1019 | { |
45694aa7 | 1020 | if (tool->lost == perf_event__process_lost && |
7b27509f ACM |
1021 | session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) { |
1022 | ui__warning("Processed %d events and lost %d chunks!\n\n" | |
1023 | "Check IO/CPU overload!\n\n", | |
1024 | session->hists.stats.nr_events[0], | |
1025 | session->hists.stats.nr_events[PERF_RECORD_LOST]); | |
11095994 ACM |
1026 | } |
1027 | ||
1028 | if (session->hists.stats.nr_unknown_events != 0) { | |
1029 | ui__warning("Found %u unknown events!\n\n" | |
1030 | "Is this an older tool processing a perf.data " | |
1031 | "file generated by a more recent tool?\n\n" | |
1032 | "If that is not the case, consider " | |
1033 | "reporting to linux-kernel@vger.kernel.org.\n\n", | |
1034 | session->hists.stats.nr_unknown_events); | |
1035 | } | |
1036 | ||
9e69c210 ACM |
1037 | if (session->hists.stats.nr_unknown_id != 0) { |
1038 | ui__warning("%u samples with id not present in the header\n", | |
1039 | session->hists.stats.nr_unknown_id); | |
1040 | } | |
1041 | ||
11095994 ACM |
1042 | if (session->hists.stats.nr_invalid_chains != 0) { |
1043 | ui__warning("Found invalid callchains!\n\n" | |
1044 | "%u out of %u events were discarded for this reason.\n\n" | |
1045 | "Consider reporting to linux-kernel@vger.kernel.org.\n\n", | |
1046 | session->hists.stats.nr_invalid_chains, | |
1047 | session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); | |
1048 | } | |
0c095715 JR |
1049 | |
1050 | if (session->hists.stats.nr_unprocessable_samples != 0) { | |
1051 | ui__warning("%u unprocessable samples recorded.\n" | |
1052 | "Do you have a KVM guest running and not using 'perf kvm'?\n", | |
1053 | session->hists.stats.nr_unprocessable_samples); | |
1054 | } | |
11095994 ACM |
1055 | } |
1056 | ||
8dc58101 TZ |
1057 | #define session_done() (*(volatile int *)(&session_done)) |
1058 | volatile int session_done; | |
1059 | ||
1060 | static int __perf_session__process_pipe_events(struct perf_session *self, | |
45694aa7 | 1061 | struct perf_tool *tool) |
8dc58101 | 1062 | { |
444d2866 SE |
1063 | union perf_event *event; |
1064 | uint32_t size, cur_size = 0; | |
1065 | void *buf = NULL; | |
8dc58101 TZ |
1066 | int skip = 0; |
1067 | u64 head; | |
1068 | int err; | |
1069 | void *p; | |
1070 | ||
45694aa7 | 1071 | perf_tool__fill_defaults(tool); |
8dc58101 TZ |
1072 | |
1073 | head = 0; | |
444d2866 SE |
1074 | cur_size = sizeof(union perf_event); |
1075 | ||
1076 | buf = malloc(cur_size); | |
1077 | if (!buf) | |
1078 | return -errno; | |
8dc58101 | 1079 | more: |
444d2866 SE |
1080 | event = buf; |
1081 | err = readn(self->fd, event, sizeof(struct perf_event_header)); | |
8dc58101 TZ |
1082 | if (err <= 0) { |
1083 | if (err == 0) | |
1084 | goto done; | |
1085 | ||
1086 | pr_err("failed to read event header\n"); | |
1087 | goto out_err; | |
1088 | } | |
1089 | ||
1090 | if (self->header.needs_swap) | |
444d2866 | 1091 | perf_event_header__bswap(&event->header); |
8dc58101 | 1092 | |
444d2866 | 1093 | size = event->header.size; |
8dc58101 TZ |
1094 | if (size == 0) |
1095 | size = 8; | |
1096 | ||
444d2866 SE |
1097 | if (size > cur_size) { |
1098 | void *new = realloc(buf, size); | |
1099 | if (!new) { | |
1100 | pr_err("failed to allocate memory to read event\n"); | |
1101 | goto out_err; | |
1102 | } | |
1103 | buf = new; | |
1104 | cur_size = size; | |
1105 | event = buf; | |
1106 | } | |
1107 | p = event; | |
8dc58101 TZ |
1108 | p += sizeof(struct perf_event_header); |
1109 | ||
794e43b5 | 1110 | if (size - sizeof(struct perf_event_header)) { |
1e7972cc | 1111 | err = readn(self->fd, p, size - sizeof(struct perf_event_header)); |
794e43b5 TZ |
1112 | if (err <= 0) { |
1113 | if (err == 0) { | |
1114 | pr_err("unexpected end of event stream\n"); | |
1115 | goto done; | |
1116 | } | |
8dc58101 | 1117 | |
794e43b5 TZ |
1118 | pr_err("failed to read event data\n"); |
1119 | goto out_err; | |
1120 | } | |
8dc58101 TZ |
1121 | } |
1122 | ||
444d2866 | 1123 | if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { |
9389a460 | 1124 | pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", |
444d2866 | 1125 | head, event->header.size, event->header.type); |
9389a460 JO |
1126 | err = -EINVAL; |
1127 | goto out_err; | |
8dc58101 TZ |
1128 | } |
1129 | ||
1130 | head += size; | |
1131 | ||
8dc58101 TZ |
1132 | if (skip > 0) |
1133 | head += skip; | |
1134 | ||
1135 | if (!session_done()) | |
1136 | goto more; | |
1137 | done: | |
1138 | err = 0; | |
1139 | out_err: | |
444d2866 | 1140 | free(buf); |
45694aa7 | 1141 | perf_session__warn_about_errors(self, tool); |
020bb75a | 1142 | perf_session_free_sample_buffers(self); |
8dc58101 TZ |
1143 | return err; |
1144 | } | |
1145 | ||
998bedc8 FW |
1146 | static union perf_event * |
1147 | fetch_mmaped_event(struct perf_session *session, | |
1148 | u64 head, size_t mmap_size, char *buf) | |
1149 | { | |
1150 | union perf_event *event; | |
1151 | ||
1152 | /* | |
1153 | * Ensure we have enough space remaining to read | |
1154 | * the size of the event in the headers. | |
1155 | */ | |
1156 | if (head + sizeof(event->header) > mmap_size) | |
1157 | return NULL; | |
1158 | ||
1159 | event = (union perf_event *)(buf + head); | |
1160 | ||
1161 | if (session->header.needs_swap) | |
1162 | perf_event_header__bswap(&event->header); | |
1163 | ||
1164 | if (head + event->header.size > mmap_size) | |
1165 | return NULL; | |
1166 | ||
1167 | return event; | |
1168 | } | |
1169 | ||
35d48ddf DM |
1170 | /* |
1171 | * On 64bit we can mmap the data file in one go. No need for tiny mmap | |
1172 | * slices. On 32bit we use 32MB. | |
1173 | */ | |
1174 | #if BITS_PER_LONG == 64 | |
1175 | #define MMAP_SIZE ULLONG_MAX | |
1176 | #define NUM_MMAPS 1 | |
1177 | #else | |
1178 | #define MMAP_SIZE (32 * 1024 * 1024ULL) | |
1179 | #define NUM_MMAPS 128 | |
1180 | #endif | |
1181 | ||
0331ee0c | 1182 | int __perf_session__process_events(struct perf_session *session, |
6122e4e4 | 1183 | u64 data_offset, u64 data_size, |
45694aa7 | 1184 | u64 file_size, struct perf_tool *tool) |
06aae590 | 1185 | { |
55b44629 | 1186 | u64 head, page_offset, file_offset, file_pos, progress_next; |
fe174207 | 1187 | int err, mmap_prot, mmap_flags, map_idx = 0; |
0c1fe6b2 | 1188 | size_t mmap_size; |
35d48ddf | 1189 | char *buf, *mmaps[NUM_MMAPS]; |
8115d60c | 1190 | union perf_event *event; |
06aae590 | 1191 | uint32_t size; |
0331ee0c | 1192 | |
45694aa7 | 1193 | perf_tool__fill_defaults(tool); |
06aae590 | 1194 | |
0331ee0c TG |
1195 | page_offset = page_size * (data_offset / page_size); |
1196 | file_offset = page_offset; | |
1197 | head = data_offset - page_offset; | |
06aae590 | 1198 | |
d6513281 TG |
1199 | if (data_offset + data_size < file_size) |
1200 | file_size = data_offset + data_size; | |
1201 | ||
55b44629 | 1202 | progress_next = file_size / 16; |
55b44629 | 1203 | |
35d48ddf | 1204 | mmap_size = MMAP_SIZE; |
55b44629 TG |
1205 | if (mmap_size > file_size) |
1206 | mmap_size = file_size; | |
1207 | ||
fe174207 TG |
1208 | memset(mmaps, 0, sizeof(mmaps)); |
1209 | ||
ba21594c ACM |
1210 | mmap_prot = PROT_READ; |
1211 | mmap_flags = MAP_SHARED; | |
1212 | ||
0331ee0c | 1213 | if (session->header.needs_swap) { |
ba21594c ACM |
1214 | mmap_prot |= PROT_WRITE; |
1215 | mmap_flags = MAP_PRIVATE; | |
1216 | } | |
06aae590 | 1217 | remap: |
55b44629 TG |
1218 | buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, |
1219 | file_offset); | |
06aae590 ACM |
1220 | if (buf == MAP_FAILED) { |
1221 | pr_err("failed to mmap file\n"); | |
1222 | err = -errno; | |
1223 | goto out_err; | |
1224 | } | |
fe174207 TG |
1225 | mmaps[map_idx] = buf; |
1226 | map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); | |
d6513281 | 1227 | file_pos = file_offset + head; |
06aae590 ACM |
1228 | |
1229 | more: | |
998bedc8 FW |
1230 | event = fetch_mmaped_event(session, head, mmap_size, buf); |
1231 | if (!event) { | |
fe174207 TG |
1232 | if (mmaps[map_idx]) { |
1233 | munmap(mmaps[map_idx], mmap_size); | |
1234 | mmaps[map_idx] = NULL; | |
1235 | } | |
06aae590 | 1236 | |
0331ee0c TG |
1237 | page_offset = page_size * (head / page_size); |
1238 | file_offset += page_offset; | |
1239 | head -= page_offset; | |
06aae590 ACM |
1240 | goto remap; |
1241 | } | |
1242 | ||
1243 | size = event->header.size; | |
1244 | ||
d6513281 | 1245 | if (size == 0 || |
45694aa7 | 1246 | perf_session__process_event(session, event, tool, file_pos) < 0) { |
9389a460 JO |
1247 | pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", |
1248 | file_offset + head, event->header.size, | |
1249 | event->header.type); | |
1250 | err = -EINVAL; | |
1251 | goto out_err; | |
06aae590 ACM |
1252 | } |
1253 | ||
1254 | head += size; | |
d6513281 | 1255 | file_pos += size; |
06aae590 | 1256 | |
55b44629 TG |
1257 | if (file_pos >= progress_next) { |
1258 | progress_next += file_size / 16; | |
ca59bcbc ACM |
1259 | ui_progress__update(file_pos, file_size, |
1260 | "Processing events..."); | |
55b44629 TG |
1261 | } |
1262 | ||
d6513281 | 1263 | if (file_pos < file_size) |
06aae590 | 1264 | goto more; |
d6513281 | 1265 | |
06aae590 | 1266 | err = 0; |
c61e52ee | 1267 | /* do the final flush for ordered samples */ |
0331ee0c | 1268 | session->ordered_samples.next_flush = ULLONG_MAX; |
d25380cd | 1269 | err = flush_sample_queue(session, tool); |
06aae590 | 1270 | out_err: |
a5580f3e | 1271 | ui_progress__finish(); |
45694aa7 | 1272 | perf_session__warn_about_errors(session, tool); |
020bb75a | 1273 | perf_session_free_sample_buffers(session); |
06aae590 ACM |
1274 | return err; |
1275 | } | |
27295592 | 1276 | |
6122e4e4 | 1277 | int perf_session__process_events(struct perf_session *self, |
45694aa7 | 1278 | struct perf_tool *tool) |
6122e4e4 ACM |
1279 | { |
1280 | int err; | |
1281 | ||
1282 | if (perf_session__register_idle_thread(self) == NULL) | |
1283 | return -ENOMEM; | |
1284 | ||
8dc58101 TZ |
1285 | if (!self->fd_pipe) |
1286 | err = __perf_session__process_events(self, | |
1287 | self->header.data_offset, | |
1288 | self->header.data_size, | |
45694aa7 | 1289 | self->size, tool); |
8dc58101 | 1290 | else |
45694aa7 | 1291 | err = __perf_session__process_pipe_events(self, tool); |
88ca895d | 1292 | |
6122e4e4 ACM |
1293 | return err; |
1294 | } | |
1295 | ||
7f3be652 | 1296 | bool perf_session__has_traces(struct perf_session *session, const char *msg) |
27295592 | 1297 | { |
7f3be652 | 1298 | if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) { |
d549c769 ACM |
1299 | pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); |
1300 | return false; | |
27295592 ACM |
1301 | } |
1302 | ||
d549c769 | 1303 | return true; |
27295592 | 1304 | } |
56b03f3c | 1305 | |
743eb868 ACM |
1306 | int maps__set_kallsyms_ref_reloc_sym(struct map **maps, |
1307 | const char *symbol_name, u64 addr) | |
56b03f3c ACM |
1308 | { |
1309 | char *bracket; | |
9de89fe7 | 1310 | enum map_type i; |
a1645ce1 ZY |
1311 | struct ref_reloc_sym *ref; |
1312 | ||
1313 | ref = zalloc(sizeof(struct ref_reloc_sym)); | |
1314 | if (ref == NULL) | |
1315 | return -ENOMEM; | |
56b03f3c | 1316 | |
a1645ce1 ZY |
1317 | ref->name = strdup(symbol_name); |
1318 | if (ref->name == NULL) { | |
1319 | free(ref); | |
56b03f3c | 1320 | return -ENOMEM; |
a1645ce1 | 1321 | } |
56b03f3c | 1322 | |
a1645ce1 | 1323 | bracket = strchr(ref->name, ']'); |
56b03f3c ACM |
1324 | if (bracket) |
1325 | *bracket = '\0'; | |
1326 | ||
a1645ce1 | 1327 | ref->addr = addr; |
9de89fe7 ACM |
1328 | |
1329 | for (i = 0; i < MAP__NR_TYPES; ++i) { | |
a1645ce1 ZY |
1330 | struct kmap *kmap = map__kmap(maps[i]); |
1331 | kmap->ref_reloc_sym = ref; | |
9de89fe7 ACM |
1332 | } |
1333 | ||
56b03f3c ACM |
1334 | return 0; |
1335 | } | |
1f626bc3 ACM |
1336 | |
1337 | size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) | |
1338 | { | |
1339 | return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + | |
1340 | __dsos__fprintf(&self->host_machine.user_dsos, fp) + | |
1341 | machines__fprintf_dsos(&self->machines, fp); | |
1342 | } | |
f869097e ACM |
1343 | |
1344 | size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, | |
417c2ff6 | 1345 | bool (skip)(struct dso *dso, int parm), int parm) |
f869097e | 1346 | { |
417c2ff6 ACM |
1347 | size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, skip, parm); |
1348 | return ret + machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm); | |
f869097e | 1349 | } |
e248de33 ACM |
1350 | |
1351 | size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) | |
1352 | { | |
1353 | struct perf_evsel *pos; | |
1354 | size_t ret = fprintf(fp, "Aggregated stats:\n"); | |
1355 | ||
1356 | ret += hists__fprintf_nr_events(&session->hists, fp); | |
1357 | ||
1358 | list_for_each_entry(pos, &session->evlist->entries, node) { | |
7289f83c | 1359 | ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos)); |
e248de33 ACM |
1360 | ret += hists__fprintf_nr_events(&pos->hists, fp); |
1361 | } | |
1362 | ||
1363 | return ret; | |
1364 | } | |
c0230b2b | 1365 | |
b424eba2 ACM |
1366 | size_t perf_session__fprintf(struct perf_session *session, FILE *fp) |
1367 | { | |
1368 | /* | |
1369 | * FIXME: Here we have to actually print all the machines in this | |
1370 | * session, not just the host... | |
1371 | */ | |
1372 | return machine__fprintf(&session->host_machine, fp); | |
1373 | } | |
1374 | ||
1375 | void perf_session__remove_thread(struct perf_session *session, | |
1376 | struct thread *th) | |
1377 | { | |
1378 | /* | |
1379 | * FIXME: This one makes no sense, we need to remove the thread from | |
1380 | * the machine it belongs to, perf_session can have many machines, so | |
1381 | * doing it always on ->host_machine is wrong. Fix when auditing all | |
1382 | * the 'perf kvm' code. | |
1383 | */ | |
1384 | machine__remove_thread(&session->host_machine, th); | |
1385 | } | |
1386 | ||
9cbdb702 DA |
1387 | struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, |
1388 | unsigned int type) | |
1389 | { | |
1390 | struct perf_evsel *pos; | |
1391 | ||
1392 | list_for_each_entry(pos, &session->evlist->entries, node) { | |
1393 | if (pos->attr.type == type) | |
1394 | return pos; | |
1395 | } | |
1396 | return NULL; | |
1397 | } | |
1398 | ||
71ad0f5e JO |
1399 | void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event, |
1400 | struct perf_sample *sample, struct machine *machine, | |
1401 | int print_sym, int print_dso, int print_symoffset) | |
c0230b2b DA |
1402 | { |
1403 | struct addr_location al; | |
c0230b2b DA |
1404 | struct callchain_cursor_node *node; |
1405 | ||
743eb868 | 1406 | if (perf_event__preprocess_sample(event, machine, &al, sample, |
c0230b2b DA |
1407 | NULL) < 0) { |
1408 | error("problem processing %d event, skipping it.\n", | |
1409 | event->header.type); | |
1410 | return; | |
1411 | } | |
1412 | ||
1413 | if (symbol_conf.use_callchain && sample->callchain) { | |
1414 | ||
71ad0f5e JO |
1415 | |
1416 | if (machine__resolve_callchain(machine, evsel, al.thread, | |
1417 | sample, NULL) != 0) { | |
c0230b2b DA |
1418 | if (verbose) |
1419 | error("Failed to resolve callchain. Skipping\n"); | |
1420 | return; | |
1421 | } | |
47260645 | 1422 | callchain_cursor_commit(&callchain_cursor); |
c0230b2b DA |
1423 | |
1424 | while (1) { | |
47260645 | 1425 | node = callchain_cursor_current(&callchain_cursor); |
c0230b2b DA |
1426 | if (!node) |
1427 | break; | |
1428 | ||
787bef17 DA |
1429 | printf("\t%16" PRIx64, node->ip); |
1430 | if (print_sym) { | |
547a92e0 AN |
1431 | printf(" "); |
1432 | symbol__fprintf_symname(node->sym, stdout); | |
610723f2 DA |
1433 | } |
1434 | if (print_dso) { | |
547a92e0 | 1435 | printf(" ("); |
52deff71 | 1436 | map__fprintf_dsoname(node->map, stdout); |
547a92e0 | 1437 | printf(")"); |
787bef17 DA |
1438 | } |
1439 | printf("\n"); | |
c0230b2b | 1440 | |
47260645 | 1441 | callchain_cursor_advance(&callchain_cursor); |
c0230b2b DA |
1442 | } |
1443 | ||
1444 | } else { | |
adc4bf99 | 1445 | printf("%16" PRIx64, sample->ip); |
787bef17 | 1446 | if (print_sym) { |
547a92e0 | 1447 | printf(" "); |
a978f2ab AN |
1448 | if (print_symoffset) |
1449 | symbol__fprintf_symname_offs(al.sym, &al, | |
1450 | stdout); | |
1451 | else | |
1452 | symbol__fprintf_symname(al.sym, stdout); | |
610723f2 DA |
1453 | } |
1454 | ||
1455 | if (print_dso) { | |
547a92e0 AN |
1456 | printf(" ("); |
1457 | map__fprintf_dsoname(al.map, stdout); | |
1458 | printf(")"); | |
787bef17 | 1459 | } |
c0230b2b DA |
1460 | } |
1461 | } | |
5d67be97 AB |
1462 | |
1463 | int perf_session__cpu_bitmap(struct perf_session *session, | |
1464 | const char *cpu_list, unsigned long *cpu_bitmap) | |
1465 | { | |
1466 | int i; | |
1467 | struct cpu_map *map; | |
1468 | ||
1469 | for (i = 0; i < PERF_TYPE_MAX; ++i) { | |
1470 | struct perf_evsel *evsel; | |
1471 | ||
1472 | evsel = perf_session__find_first_evtype(session, i); | |
1473 | if (!evsel) | |
1474 | continue; | |
1475 | ||
1476 | if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { | |
1477 | pr_err("File does not contain CPU events. " | |
1478 | "Remove -c option to proceed.\n"); | |
1479 | return -1; | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | map = cpu_map__new(cpu_list); | |
47fbe53b DA |
1484 | if (map == NULL) { |
1485 | pr_err("Invalid cpu_list\n"); | |
1486 | return -1; | |
1487 | } | |
5d67be97 AB |
1488 | |
1489 | for (i = 0; i < map->nr; i++) { | |
1490 | int cpu = map->map[i]; | |
1491 | ||
1492 | if (cpu >= MAX_NR_CPUS) { | |
1493 | pr_err("Requested CPU %d too large. " | |
1494 | "Consider raising MAX_NR_CPUS\n", cpu); | |
1495 | return -1; | |
1496 | } | |
1497 | ||
1498 | set_bit(cpu, cpu_bitmap); | |
1499 | } | |
1500 | ||
1501 | return 0; | |
1502 | } | |
fbe96f29 SE |
1503 | |
1504 | void perf_session__fprintf_info(struct perf_session *session, FILE *fp, | |
1505 | bool full) | |
1506 | { | |
1507 | struct stat st; | |
1508 | int ret; | |
1509 | ||
1510 | if (session == NULL || fp == NULL) | |
1511 | return; | |
1512 | ||
1513 | ret = fstat(session->fd, &st); | |
1514 | if (ret == -1) | |
1515 | return; | |
1516 | ||
1517 | fprintf(fp, "# ========\n"); | |
1518 | fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); | |
1519 | perf_header__fprintf_info(session, fp, full); | |
1520 | fprintf(fp, "# ========\n#\n"); | |
1521 | } | |
da378962 ACM |
1522 | |
1523 | ||
1524 | int __perf_session__set_tracepoints_handlers(struct perf_session *session, | |
1525 | const struct perf_evsel_str_handler *assocs, | |
1526 | size_t nr_assocs) | |
1527 | { | |
1528 | struct perf_evlist *evlist = session->evlist; | |
1529 | struct event_format *format; | |
1530 | struct perf_evsel *evsel; | |
1531 | char *tracepoint, *name; | |
1532 | size_t i; | |
1533 | int err; | |
1534 | ||
1535 | for (i = 0; i < nr_assocs; i++) { | |
1536 | err = -ENOMEM; | |
1537 | tracepoint = strdup(assocs[i].name); | |
1538 | if (tracepoint == NULL) | |
1539 | goto out; | |
1540 | ||
1541 | err = -ENOENT; | |
1542 | name = strchr(tracepoint, ':'); | |
1543 | if (name == NULL) | |
1544 | goto out_free; | |
1545 | ||
1546 | *name++ = '\0'; | |
1547 | format = pevent_find_event_by_name(session->pevent, | |
1548 | tracepoint, name); | |
1549 | if (format == NULL) { | |
1550 | /* | |
1551 | * Adding a handler for an event not in the session, | |
1552 | * just ignore it. | |
1553 | */ | |
1554 | goto next; | |
1555 | } | |
1556 | ||
1557 | evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id); | |
1558 | if (evsel == NULL) | |
1559 | goto next; | |
1560 | ||
1561 | err = -EEXIST; | |
1562 | if (evsel->handler.func != NULL) | |
1563 | goto out_free; | |
1564 | evsel->handler.func = assocs[i].handler; | |
1565 | next: | |
1566 | free(tracepoint); | |
1567 | } | |
1568 | ||
1569 | err = 0; | |
1570 | out: | |
1571 | return err; | |
1572 | ||
1573 | out_free: | |
1574 | free(tracepoint); | |
1575 | goto out; | |
1576 | } |