Commit | Line | Data |
---|---|---|
b8f46c5a XG |
1 | #define _FILE_OFFSET_BITS 64 |
2 | ||
a9072bc0 | 3 | #include "util.h" |
7c6a1c65 | 4 | #include <sys/types.h> |
ba21594c | 5 | #include <byteswap.h> |
7c6a1c65 PZ |
6 | #include <unistd.h> |
7 | #include <stdio.h> | |
8 | #include <stdlib.h> | |
8671dab9 | 9 | #include <linux/list.h> |
ba21594c | 10 | #include <linux/kernel.h> |
b1e5a9be | 11 | #include <linux/bitops.h> |
fbe96f29 | 12 | #include <sys/utsname.h> |
7c6a1c65 | 13 | |
361c99a6 | 14 | #include "evlist.h" |
a91e5431 | 15 | #include "evsel.h" |
7c6a1c65 | 16 | #include "header.h" |
03456a15 FW |
17 | #include "../perf.h" |
18 | #include "trace-event.h" | |
301a0b02 | 19 | #include "session.h" |
8671dab9 | 20 | #include "symbol.h" |
4778d2e4 | 21 | #include "debug.h" |
fbe96f29 | 22 | #include "cpumap.h" |
50a9667c | 23 | #include "pmu.h" |
7dbf4dcf | 24 | #include "vdso.h" |
7c6a1c65 | 25 | |
a1ac1d3c SE |
26 | static bool no_buildid_cache = false; |
27 | ||
db146f06 RR |
28 | static int trace_event_count; |
29 | static struct perf_trace_event_type *trace_events; | |
8755a8f2 | 30 | |
fbe96f29 SE |
31 | static u32 header_argc; |
32 | static const char **header_argv; | |
33 | ||
ae99fb2c | 34 | int perf_header__push_event(u64 id, const char *name) |
8755a8f2 | 35 | { |
f3054c77 UD |
36 | struct perf_trace_event_type *nevents; |
37 | ||
ec60a3fe | 38 | if (strlen(name) > MAX_EVENT_NAME) |
6beba7ad | 39 | pr_warning("Event %s will be truncated\n", name); |
8755a8f2 | 40 | |
db146f06 | 41 | nevents = realloc(trace_events, (trace_event_count + 1) * sizeof(*trace_events)); |
f3054c77 UD |
42 | if (nevents == NULL) |
43 | return -ENOMEM; | |
db146f06 | 44 | trace_events = nevents; |
ae99fb2c | 45 | |
db146f06 RR |
46 | memset(&trace_events[trace_event_count], 0, sizeof(struct perf_trace_event_type)); |
47 | trace_events[trace_event_count].event_id = id; | |
48 | strncpy(trace_events[trace_event_count].name, name, MAX_EVENT_NAME - 1); | |
49 | trace_event_count++; | |
ae99fb2c | 50 | return 0; |
8755a8f2 AV |
51 | } |
52 | ||
53 | char *perf_header__find_event(u64 id) | |
54 | { | |
55 | int i; | |
db146f06 RR |
56 | for (i = 0 ; i < trace_event_count; i++) { |
57 | if (trace_events[i].event_id == id) | |
58 | return trace_events[i].name; | |
8755a8f2 AV |
59 | } |
60 | return NULL; | |
61 | } | |
62 | ||
73323f54 SE |
63 | /* |
64 | * magic2 = "PERFILE2" | |
65 | * must be a numerical value to let the endianness | |
66 | * determine the memory layout. That way we are able | |
67 | * to detect endianness when reading the perf.data file | |
68 | * back. | |
69 | * | |
70 | * we check for legacy (PERFFILE) format. | |
71 | */ | |
72 | static const char *__perf_magic1 = "PERFFILE"; | |
73 | static const u64 __perf_magic2 = 0x32454c4946524550ULL; | |
74 | static const u64 __perf_magic2_sw = 0x50455246494c4532ULL; | |
7c6a1c65 | 75 | |
73323f54 | 76 | #define PERF_MAGIC __perf_magic2 |
7c6a1c65 | 77 | |
7c6a1c65 | 78 | struct perf_file_attr { |
cdd6c482 | 79 | struct perf_event_attr attr; |
7c6a1c65 PZ |
80 | struct perf_file_section ids; |
81 | }; | |
82 | ||
1c0b04d1 | 83 | void perf_header__set_feat(struct perf_header *header, int feat) |
8d06367f | 84 | { |
1c0b04d1 | 85 | set_bit(feat, header->adds_features); |
8d06367f ACM |
86 | } |
87 | ||
1c0b04d1 | 88 | void perf_header__clear_feat(struct perf_header *header, int feat) |
baa2f6ce | 89 | { |
1c0b04d1 | 90 | clear_bit(feat, header->adds_features); |
baa2f6ce ACM |
91 | } |
92 | ||
1c0b04d1 | 93 | bool perf_header__has_feat(const struct perf_header *header, int feat) |
8d06367f | 94 | { |
1c0b04d1 | 95 | return test_bit(feat, header->adds_features); |
8d06367f ACM |
96 | } |
97 | ||
3726cc75 | 98 | static int do_write(int fd, const void *buf, size_t size) |
7c6a1c65 PZ |
99 | { |
100 | while (size) { | |
101 | int ret = write(fd, buf, size); | |
102 | ||
103 | if (ret < 0) | |
d5eed904 | 104 | return -errno; |
7c6a1c65 PZ |
105 | |
106 | size -= ret; | |
107 | buf += ret; | |
108 | } | |
3726cc75 ACM |
109 | |
110 | return 0; | |
7c6a1c65 PZ |
111 | } |
112 | ||
f92cb24c ACM |
113 | #define NAME_ALIGN 64 |
114 | ||
115 | static int write_padded(int fd, const void *bf, size_t count, | |
116 | size_t count_aligned) | |
117 | { | |
118 | static const char zero_buf[NAME_ALIGN]; | |
119 | int err = do_write(fd, bf, count); | |
120 | ||
121 | if (!err) | |
122 | err = do_write(fd, zero_buf, count_aligned - count); | |
123 | ||
124 | return err; | |
125 | } | |
126 | ||
fbe96f29 SE |
127 | static int do_write_string(int fd, const char *str) |
128 | { | |
129 | u32 len, olen; | |
130 | int ret; | |
131 | ||
132 | olen = strlen(str) + 1; | |
9ac3e487 | 133 | len = PERF_ALIGN(olen, NAME_ALIGN); |
fbe96f29 SE |
134 | |
135 | /* write len, incl. \0 */ | |
136 | ret = do_write(fd, &len, sizeof(len)); | |
137 | if (ret < 0) | |
138 | return ret; | |
139 | ||
140 | return write_padded(fd, str, olen, len); | |
141 | } | |
142 | ||
143 | static char *do_read_string(int fd, struct perf_header *ph) | |
144 | { | |
145 | ssize_t sz, ret; | |
146 | u32 len; | |
147 | char *buf; | |
148 | ||
149 | sz = read(fd, &len, sizeof(len)); | |
150 | if (sz < (ssize_t)sizeof(len)) | |
151 | return NULL; | |
152 | ||
153 | if (ph->needs_swap) | |
154 | len = bswap_32(len); | |
155 | ||
156 | buf = malloc(len); | |
157 | if (!buf) | |
158 | return NULL; | |
159 | ||
160 | ret = read(fd, buf, len); | |
161 | if (ret == (ssize_t)len) { | |
162 | /* | |
163 | * strings are padded by zeroes | |
164 | * thus the actual strlen of buf | |
165 | * may be less than len | |
166 | */ | |
167 | return buf; | |
168 | } | |
169 | ||
170 | free(buf); | |
171 | return NULL; | |
172 | } | |
173 | ||
174 | int | |
175 | perf_header__set_cmdline(int argc, const char **argv) | |
176 | { | |
177 | int i; | |
178 | ||
56e6f602 DA |
179 | /* |
180 | * If header_argv has already been set, do not override it. | |
181 | * This allows a command to set the cmdline, parse args and | |
182 | * then call another builtin function that implements a | |
183 | * command -- e.g, cmd_kvm calling cmd_record. | |
184 | */ | |
185 | if (header_argv) | |
186 | return 0; | |
187 | ||
fbe96f29 SE |
188 | header_argc = (u32)argc; |
189 | ||
190 | /* do not include NULL termination */ | |
191 | header_argv = calloc(argc, sizeof(char *)); | |
192 | if (!header_argv) | |
193 | return -ENOMEM; | |
194 | ||
195 | /* | |
196 | * must copy argv contents because it gets moved | |
197 | * around during option parsing | |
198 | */ | |
199 | for (i = 0; i < argc ; i++) | |
200 | header_argv[i] = argv[i]; | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
1b549504 RR |
205 | #define dsos__for_each_with_build_id(pos, head) \ |
206 | list_for_each_entry(pos, head, node) \ | |
207 | if (!pos->has_build_id) \ | |
208 | continue; \ | |
209 | else | |
210 | ||
7dbf4dcf JO |
211 | static int write_buildid(char *name, size_t name_len, u8 *build_id, |
212 | pid_t pid, u16 misc, int fd) | |
213 | { | |
214 | int err; | |
215 | struct build_id_event b; | |
216 | size_t len; | |
217 | ||
218 | len = name_len + 1; | |
219 | len = PERF_ALIGN(len, NAME_ALIGN); | |
220 | ||
221 | memset(&b, 0, sizeof(b)); | |
222 | memcpy(&b.build_id, build_id, BUILD_ID_SIZE); | |
223 | b.pid = pid; | |
224 | b.header.misc = misc; | |
225 | b.header.size = sizeof(b) + len; | |
226 | ||
227 | err = do_write(fd, &b, sizeof(b)); | |
228 | if (err < 0) | |
229 | return err; | |
230 | ||
231 | return write_padded(fd, name, name_len + 1, len); | |
232 | } | |
233 | ||
1b549504 RR |
234 | static int __dsos__write_buildid_table(struct list_head *head, pid_t pid, |
235 | u16 misc, int fd) | |
236 | { | |
237 | struct dso *pos; | |
238 | ||
239 | dsos__for_each_with_build_id(pos, head) { | |
240 | int err; | |
7dbf4dcf JO |
241 | char *name; |
242 | size_t name_len; | |
1b549504 RR |
243 | |
244 | if (!pos->hit) | |
245 | continue; | |
7dbf4dcf JO |
246 | |
247 | if (is_vdso_map(pos->short_name)) { | |
248 | name = (char *) VDSO__MAP_NAME; | |
249 | name_len = sizeof(VDSO__MAP_NAME) + 1; | |
250 | } else { | |
251 | name = pos->long_name; | |
252 | name_len = pos->long_name_len + 1; | |
253 | } | |
254 | ||
255 | err = write_buildid(name, name_len, pos->build_id, | |
256 | pid, misc, fd); | |
257 | if (err) | |
1b549504 RR |
258 | return err; |
259 | } | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static int machine__write_buildid_table(struct machine *machine, int fd) | |
265 | { | |
266 | int err; | |
267 | u16 kmisc = PERF_RECORD_MISC_KERNEL, | |
268 | umisc = PERF_RECORD_MISC_USER; | |
269 | ||
270 | if (!machine__is_host(machine)) { | |
271 | kmisc = PERF_RECORD_MISC_GUEST_KERNEL; | |
272 | umisc = PERF_RECORD_MISC_GUEST_USER; | |
273 | } | |
274 | ||
275 | err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid, | |
276 | kmisc, fd); | |
277 | if (err == 0) | |
278 | err = __dsos__write_buildid_table(&machine->user_dsos, | |
279 | machine->pid, umisc, fd); | |
280 | return err; | |
281 | } | |
282 | ||
283 | static int dsos__write_buildid_table(struct perf_header *header, int fd) | |
284 | { | |
285 | struct perf_session *session = container_of(header, | |
286 | struct perf_session, header); | |
287 | struct rb_node *nd; | |
288 | int err = machine__write_buildid_table(&session->host_machine, fd); | |
289 | ||
290 | if (err) | |
291 | return err; | |
292 | ||
293 | for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) { | |
294 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
295 | err = machine__write_buildid_table(pos, fd); | |
296 | if (err) | |
297 | break; | |
298 | } | |
299 | return err; | |
300 | } | |
301 | ||
302 | int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, | |
7dbf4dcf | 303 | const char *name, bool is_kallsyms, bool is_vdso) |
1b549504 RR |
304 | { |
305 | const size_t size = PATH_MAX; | |
306 | char *realname, *filename = zalloc(size), | |
307 | *linkname = zalloc(size), *targetname; | |
308 | int len, err = -1; | |
7dbf4dcf | 309 | bool slash = is_kallsyms || is_vdso; |
1b549504 RR |
310 | |
311 | if (is_kallsyms) { | |
312 | if (symbol_conf.kptr_restrict) { | |
313 | pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n"); | |
314 | return 0; | |
315 | } | |
7dbf4dcf | 316 | realname = (char *) name; |
1b549504 RR |
317 | } else |
318 | realname = realpath(name, NULL); | |
319 | ||
320 | if (realname == NULL || filename == NULL || linkname == NULL) | |
321 | goto out_free; | |
322 | ||
e7f01d1e | 323 | len = scnprintf(filename, size, "%s%s%s", |
7dbf4dcf JO |
324 | debugdir, slash ? "/" : "", |
325 | is_vdso ? VDSO__MAP_NAME : realname); | |
1b549504 RR |
326 | if (mkdir_p(filename, 0755)) |
327 | goto out_free; | |
328 | ||
afda0f94 | 329 | snprintf(filename + len, size - len, "/%s", sbuild_id); |
1b549504 RR |
330 | |
331 | if (access(filename, F_OK)) { | |
332 | if (is_kallsyms) { | |
333 | if (copyfile("/proc/kallsyms", filename)) | |
334 | goto out_free; | |
335 | } else if (link(realname, filename) && copyfile(name, filename)) | |
336 | goto out_free; | |
337 | } | |
338 | ||
e7f01d1e | 339 | len = scnprintf(linkname, size, "%s/.build-id/%.2s", |
1b549504 RR |
340 | debugdir, sbuild_id); |
341 | ||
342 | if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) | |
343 | goto out_free; | |
344 | ||
345 | snprintf(linkname + len, size - len, "/%s", sbuild_id + 2); | |
346 | targetname = filename + strlen(debugdir) - 5; | |
347 | memcpy(targetname, "../..", 5); | |
348 | ||
349 | if (symlink(targetname, linkname) == 0) | |
350 | err = 0; | |
351 | out_free: | |
352 | if (!is_kallsyms) | |
353 | free(realname); | |
354 | free(filename); | |
355 | free(linkname); | |
356 | return err; | |
357 | } | |
358 | ||
359 | static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size, | |
360 | const char *name, const char *debugdir, | |
7dbf4dcf | 361 | bool is_kallsyms, bool is_vdso) |
1b549504 RR |
362 | { |
363 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
364 | ||
365 | build_id__sprintf(build_id, build_id_size, sbuild_id); | |
366 | ||
7dbf4dcf JO |
367 | return build_id_cache__add_s(sbuild_id, debugdir, name, |
368 | is_kallsyms, is_vdso); | |
1b549504 RR |
369 | } |
370 | ||
371 | int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir) | |
372 | { | |
373 | const size_t size = PATH_MAX; | |
374 | char *filename = zalloc(size), | |
375 | *linkname = zalloc(size); | |
376 | int err = -1; | |
377 | ||
378 | if (filename == NULL || linkname == NULL) | |
379 | goto out_free; | |
380 | ||
381 | snprintf(linkname, size, "%s/.build-id/%.2s/%s", | |
382 | debugdir, sbuild_id, sbuild_id + 2); | |
383 | ||
384 | if (access(linkname, F_OK)) | |
385 | goto out_free; | |
386 | ||
387 | if (readlink(linkname, filename, size - 1) < 0) | |
388 | goto out_free; | |
389 | ||
390 | if (unlink(linkname)) | |
391 | goto out_free; | |
392 | ||
393 | /* | |
394 | * Since the link is relative, we must make it absolute: | |
395 | */ | |
396 | snprintf(linkname, size, "%s/.build-id/%.2s/%s", | |
397 | debugdir, sbuild_id, filename); | |
398 | ||
399 | if (unlink(linkname)) | |
400 | goto out_free; | |
401 | ||
402 | err = 0; | |
403 | out_free: | |
404 | free(filename); | |
405 | free(linkname); | |
406 | return err; | |
407 | } | |
408 | ||
409 | static int dso__cache_build_id(struct dso *dso, const char *debugdir) | |
410 | { | |
411 | bool is_kallsyms = dso->kernel && dso->long_name[0] != '/'; | |
7dbf4dcf | 412 | bool is_vdso = is_vdso_map(dso->short_name); |
1b549504 RR |
413 | |
414 | return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), | |
7dbf4dcf JO |
415 | dso->long_name, debugdir, |
416 | is_kallsyms, is_vdso); | |
1b549504 RR |
417 | } |
418 | ||
419 | static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir) | |
420 | { | |
421 | struct dso *pos; | |
422 | int err = 0; | |
423 | ||
424 | dsos__for_each_with_build_id(pos, head) | |
425 | if (dso__cache_build_id(pos, debugdir)) | |
426 | err = -1; | |
427 | ||
428 | return err; | |
429 | } | |
430 | ||
431 | static int machine__cache_build_ids(struct machine *machine, const char *debugdir) | |
432 | { | |
433 | int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir); | |
434 | ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir); | |
435 | return ret; | |
436 | } | |
437 | ||
438 | static int perf_session__cache_build_ids(struct perf_session *session) | |
439 | { | |
440 | struct rb_node *nd; | |
441 | int ret; | |
442 | char debugdir[PATH_MAX]; | |
443 | ||
444 | snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); | |
445 | ||
446 | if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) | |
447 | return -1; | |
448 | ||
449 | ret = machine__cache_build_ids(&session->host_machine, debugdir); | |
450 | ||
451 | for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) { | |
452 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
453 | ret |= machine__cache_build_ids(pos, debugdir); | |
454 | } | |
455 | return ret ? -1 : 0; | |
456 | } | |
457 | ||
458 | static bool machine__read_build_ids(struct machine *machine, bool with_hits) | |
459 | { | |
460 | bool ret = __dsos__read_build_ids(&machine->kernel_dsos, with_hits); | |
461 | ret |= __dsos__read_build_ids(&machine->user_dsos, with_hits); | |
462 | return ret; | |
463 | } | |
464 | ||
465 | static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits) | |
466 | { | |
467 | struct rb_node *nd; | |
468 | bool ret = machine__read_build_ids(&session->host_machine, with_hits); | |
469 | ||
470 | for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) { | |
471 | struct machine *pos = rb_entry(nd, struct machine, rb_node); | |
472 | ret |= machine__read_build_ids(pos, with_hits); | |
473 | } | |
474 | ||
475 | return ret; | |
476 | } | |
477 | ||
2eeaaa09 | 478 | static int write_tracing_data(int fd, struct perf_header *h __used, |
fbe96f29 SE |
479 | struct perf_evlist *evlist) |
480 | { | |
481 | return read_tracing_data(fd, &evlist->entries); | |
482 | } | |
483 | ||
484 | ||
485 | static int write_build_id(int fd, struct perf_header *h, | |
486 | struct perf_evlist *evlist __used) | |
487 | { | |
488 | struct perf_session *session; | |
489 | int err; | |
490 | ||
491 | session = container_of(h, struct perf_session, header); | |
492 | ||
e20960c0 RR |
493 | if (!perf_session__read_build_ids(session, true)) |
494 | return -1; | |
495 | ||
fbe96f29 SE |
496 | err = dsos__write_buildid_table(h, fd); |
497 | if (err < 0) { | |
498 | pr_debug("failed to write buildid table\n"); | |
499 | return err; | |
500 | } | |
501 | if (!no_buildid_cache) | |
502 | perf_session__cache_build_ids(session); | |
503 | ||
504 | return 0; | |
505 | } | |
506 | ||
507 | static int write_hostname(int fd, struct perf_header *h __used, | |
508 | struct perf_evlist *evlist __used) | |
509 | { | |
510 | struct utsname uts; | |
511 | int ret; | |
512 | ||
513 | ret = uname(&uts); | |
514 | if (ret < 0) | |
515 | return -1; | |
516 | ||
517 | return do_write_string(fd, uts.nodename); | |
518 | } | |
519 | ||
520 | static int write_osrelease(int fd, struct perf_header *h __used, | |
521 | struct perf_evlist *evlist __used) | |
522 | { | |
523 | struct utsname uts; | |
524 | int ret; | |
525 | ||
526 | ret = uname(&uts); | |
527 | if (ret < 0) | |
528 | return -1; | |
529 | ||
530 | return do_write_string(fd, uts.release); | |
531 | } | |
532 | ||
533 | static int write_arch(int fd, struct perf_header *h __used, | |
534 | struct perf_evlist *evlist __used) | |
535 | { | |
536 | struct utsname uts; | |
537 | int ret; | |
538 | ||
539 | ret = uname(&uts); | |
540 | if (ret < 0) | |
541 | return -1; | |
542 | ||
543 | return do_write_string(fd, uts.machine); | |
544 | } | |
545 | ||
546 | static int write_version(int fd, struct perf_header *h __used, | |
547 | struct perf_evlist *evlist __used) | |
548 | { | |
549 | return do_write_string(fd, perf_version_string); | |
550 | } | |
551 | ||
552 | static int write_cpudesc(int fd, struct perf_header *h __used, | |
553 | struct perf_evlist *evlist __used) | |
554 | { | |
555 | #ifndef CPUINFO_PROC | |
556 | #define CPUINFO_PROC NULL | |
557 | #endif | |
558 | FILE *file; | |
559 | char *buf = NULL; | |
560 | char *s, *p; | |
561 | const char *search = CPUINFO_PROC; | |
562 | size_t len = 0; | |
563 | int ret = -1; | |
564 | ||
565 | if (!search) | |
566 | return -1; | |
567 | ||
568 | file = fopen("/proc/cpuinfo", "r"); | |
569 | if (!file) | |
570 | return -1; | |
571 | ||
572 | while (getline(&buf, &len, file) > 0) { | |
573 | ret = strncmp(buf, search, strlen(search)); | |
574 | if (!ret) | |
575 | break; | |
576 | } | |
577 | ||
578 | if (ret) | |
579 | goto done; | |
580 | ||
581 | s = buf; | |
582 | ||
583 | p = strchr(buf, ':'); | |
584 | if (p && *(p+1) == ' ' && *(p+2)) | |
585 | s = p + 2; | |
586 | p = strchr(s, '\n'); | |
587 | if (p) | |
588 | *p = '\0'; | |
589 | ||
590 | /* squash extra space characters (branding string) */ | |
591 | p = s; | |
592 | while (*p) { | |
593 | if (isspace(*p)) { | |
594 | char *r = p + 1; | |
595 | char *q = r; | |
596 | *p = ' '; | |
597 | while (*q && isspace(*q)) | |
598 | q++; | |
599 | if (q != (p+1)) | |
600 | while ((*r++ = *q++)); | |
601 | } | |
602 | p++; | |
603 | } | |
604 | ret = do_write_string(fd, s); | |
605 | done: | |
606 | free(buf); | |
607 | fclose(file); | |
608 | return ret; | |
609 | } | |
610 | ||
611 | static int write_nrcpus(int fd, struct perf_header *h __used, | |
612 | struct perf_evlist *evlist __used) | |
613 | { | |
614 | long nr; | |
615 | u32 nrc, nra; | |
616 | int ret; | |
617 | ||
618 | nr = sysconf(_SC_NPROCESSORS_CONF); | |
619 | if (nr < 0) | |
620 | return -1; | |
621 | ||
622 | nrc = (u32)(nr & UINT_MAX); | |
623 | ||
624 | nr = sysconf(_SC_NPROCESSORS_ONLN); | |
625 | if (nr < 0) | |
626 | return -1; | |
627 | ||
628 | nra = (u32)(nr & UINT_MAX); | |
629 | ||
630 | ret = do_write(fd, &nrc, sizeof(nrc)); | |
631 | if (ret < 0) | |
632 | return ret; | |
633 | ||
634 | return do_write(fd, &nra, sizeof(nra)); | |
635 | } | |
636 | ||
637 | static int write_event_desc(int fd, struct perf_header *h __used, | |
638 | struct perf_evlist *evlist) | |
639 | { | |
6606f873 | 640 | struct perf_evsel *evsel; |
74ba9e11 | 641 | u32 nre, nri, sz; |
fbe96f29 SE |
642 | int ret; |
643 | ||
74ba9e11 | 644 | nre = evlist->nr_entries; |
fbe96f29 SE |
645 | |
646 | /* | |
647 | * write number of events | |
648 | */ | |
649 | ret = do_write(fd, &nre, sizeof(nre)); | |
650 | if (ret < 0) | |
651 | return ret; | |
652 | ||
653 | /* | |
654 | * size of perf_event_attr struct | |
655 | */ | |
6606f873 | 656 | sz = (u32)sizeof(evsel->attr); |
fbe96f29 SE |
657 | ret = do_write(fd, &sz, sizeof(sz)); |
658 | if (ret < 0) | |
659 | return ret; | |
660 | ||
6606f873 | 661 | list_for_each_entry(evsel, &evlist->entries, node) { |
fbe96f29 | 662 | |
6606f873 | 663 | ret = do_write(fd, &evsel->attr, sz); |
fbe96f29 SE |
664 | if (ret < 0) |
665 | return ret; | |
666 | /* | |
667 | * write number of unique id per event | |
668 | * there is one id per instance of an event | |
669 | * | |
670 | * copy into an nri to be independent of the | |
671 | * type of ids, | |
672 | */ | |
6606f873 | 673 | nri = evsel->ids; |
fbe96f29 SE |
674 | ret = do_write(fd, &nri, sizeof(nri)); |
675 | if (ret < 0) | |
676 | return ret; | |
677 | ||
678 | /* | |
679 | * write event string as passed on cmdline | |
680 | */ | |
6606f873 | 681 | ret = do_write_string(fd, perf_evsel__name(evsel)); |
fbe96f29 SE |
682 | if (ret < 0) |
683 | return ret; | |
684 | /* | |
685 | * write unique ids for this event | |
686 | */ | |
6606f873 | 687 | ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64)); |
fbe96f29 SE |
688 | if (ret < 0) |
689 | return ret; | |
690 | } | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static int write_cmdline(int fd, struct perf_header *h __used, | |
695 | struct perf_evlist *evlist __used) | |
696 | { | |
697 | char buf[MAXPATHLEN]; | |
698 | char proc[32]; | |
699 | u32 i, n; | |
700 | int ret; | |
701 | ||
702 | /* | |
703 | * actual atual path to perf binary | |
704 | */ | |
705 | sprintf(proc, "/proc/%d/exe", getpid()); | |
706 | ret = readlink(proc, buf, sizeof(buf)); | |
707 | if (ret <= 0) | |
708 | return -1; | |
709 | ||
710 | /* readlink() does not add null termination */ | |
711 | buf[ret] = '\0'; | |
712 | ||
713 | /* account for binary path */ | |
714 | n = header_argc + 1; | |
715 | ||
716 | ret = do_write(fd, &n, sizeof(n)); | |
717 | if (ret < 0) | |
718 | return ret; | |
719 | ||
720 | ret = do_write_string(fd, buf); | |
721 | if (ret < 0) | |
722 | return ret; | |
723 | ||
724 | for (i = 0 ; i < header_argc; i++) { | |
725 | ret = do_write_string(fd, header_argv[i]); | |
726 | if (ret < 0) | |
727 | return ret; | |
728 | } | |
729 | return 0; | |
730 | } | |
731 | ||
732 | #define CORE_SIB_FMT \ | |
733 | "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list" | |
734 | #define THRD_SIB_FMT \ | |
735 | "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list" | |
736 | ||
737 | struct cpu_topo { | |
738 | u32 core_sib; | |
739 | u32 thread_sib; | |
740 | char **core_siblings; | |
741 | char **thread_siblings; | |
742 | }; | |
743 | ||
744 | static int build_cpu_topo(struct cpu_topo *tp, int cpu) | |
745 | { | |
746 | FILE *fp; | |
747 | char filename[MAXPATHLEN]; | |
748 | char *buf = NULL, *p; | |
749 | size_t len = 0; | |
750 | u32 i = 0; | |
751 | int ret = -1; | |
752 | ||
753 | sprintf(filename, CORE_SIB_FMT, cpu); | |
754 | fp = fopen(filename, "r"); | |
755 | if (!fp) | |
756 | return -1; | |
757 | ||
758 | if (getline(&buf, &len, fp) <= 0) | |
759 | goto done; | |
760 | ||
761 | fclose(fp); | |
762 | ||
763 | p = strchr(buf, '\n'); | |
764 | if (p) | |
765 | *p = '\0'; | |
766 | ||
767 | for (i = 0; i < tp->core_sib; i++) { | |
768 | if (!strcmp(buf, tp->core_siblings[i])) | |
769 | break; | |
770 | } | |
771 | if (i == tp->core_sib) { | |
772 | tp->core_siblings[i] = buf; | |
773 | tp->core_sib++; | |
774 | buf = NULL; | |
775 | len = 0; | |
776 | } | |
777 | ||
778 | sprintf(filename, THRD_SIB_FMT, cpu); | |
779 | fp = fopen(filename, "r"); | |
780 | if (!fp) | |
781 | goto done; | |
782 | ||
783 | if (getline(&buf, &len, fp) <= 0) | |
784 | goto done; | |
785 | ||
786 | p = strchr(buf, '\n'); | |
787 | if (p) | |
788 | *p = '\0'; | |
789 | ||
790 | for (i = 0; i < tp->thread_sib; i++) { | |
791 | if (!strcmp(buf, tp->thread_siblings[i])) | |
792 | break; | |
793 | } | |
794 | if (i == tp->thread_sib) { | |
795 | tp->thread_siblings[i] = buf; | |
796 | tp->thread_sib++; | |
797 | buf = NULL; | |
798 | } | |
799 | ret = 0; | |
800 | done: | |
801 | if(fp) | |
802 | fclose(fp); | |
803 | free(buf); | |
804 | return ret; | |
805 | } | |
806 | ||
807 | static void free_cpu_topo(struct cpu_topo *tp) | |
808 | { | |
809 | u32 i; | |
810 | ||
811 | if (!tp) | |
812 | return; | |
813 | ||
814 | for (i = 0 ; i < tp->core_sib; i++) | |
815 | free(tp->core_siblings[i]); | |
816 | ||
817 | for (i = 0 ; i < tp->thread_sib; i++) | |
818 | free(tp->thread_siblings[i]); | |
819 | ||
820 | free(tp); | |
821 | } | |
822 | ||
823 | static struct cpu_topo *build_cpu_topology(void) | |
824 | { | |
825 | struct cpu_topo *tp; | |
826 | void *addr; | |
827 | u32 nr, i; | |
828 | size_t sz; | |
829 | long ncpus; | |
830 | int ret = -1; | |
831 | ||
832 | ncpus = sysconf(_SC_NPROCESSORS_CONF); | |
833 | if (ncpus < 0) | |
834 | return NULL; | |
835 | ||
836 | nr = (u32)(ncpus & UINT_MAX); | |
837 | ||
838 | sz = nr * sizeof(char *); | |
839 | ||
840 | addr = calloc(1, sizeof(*tp) + 2 * sz); | |
841 | if (!addr) | |
842 | return NULL; | |
843 | ||
844 | tp = addr; | |
845 | ||
846 | addr += sizeof(*tp); | |
847 | tp->core_siblings = addr; | |
848 | addr += sz; | |
849 | tp->thread_siblings = addr; | |
850 | ||
851 | for (i = 0; i < nr; i++) { | |
852 | ret = build_cpu_topo(tp, i); | |
853 | if (ret < 0) | |
854 | break; | |
855 | } | |
856 | if (ret) { | |
857 | free_cpu_topo(tp); | |
858 | tp = NULL; | |
859 | } | |
860 | return tp; | |
861 | } | |
862 | ||
863 | static int write_cpu_topology(int fd, struct perf_header *h __used, | |
864 | struct perf_evlist *evlist __used) | |
865 | { | |
866 | struct cpu_topo *tp; | |
867 | u32 i; | |
868 | int ret; | |
869 | ||
870 | tp = build_cpu_topology(); | |
871 | if (!tp) | |
872 | return -1; | |
873 | ||
874 | ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib)); | |
875 | if (ret < 0) | |
876 | goto done; | |
877 | ||
878 | for (i = 0; i < tp->core_sib; i++) { | |
879 | ret = do_write_string(fd, tp->core_siblings[i]); | |
880 | if (ret < 0) | |
881 | goto done; | |
882 | } | |
883 | ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib)); | |
884 | if (ret < 0) | |
885 | goto done; | |
886 | ||
887 | for (i = 0; i < tp->thread_sib; i++) { | |
888 | ret = do_write_string(fd, tp->thread_siblings[i]); | |
889 | if (ret < 0) | |
890 | break; | |
891 | } | |
892 | done: | |
893 | free_cpu_topo(tp); | |
894 | return ret; | |
895 | } | |
896 | ||
897 | ||
898 | ||
899 | static int write_total_mem(int fd, struct perf_header *h __used, | |
900 | struct perf_evlist *evlist __used) | |
901 | { | |
902 | char *buf = NULL; | |
903 | FILE *fp; | |
904 | size_t len = 0; | |
905 | int ret = -1, n; | |
906 | uint64_t mem; | |
907 | ||
908 | fp = fopen("/proc/meminfo", "r"); | |
909 | if (!fp) | |
910 | return -1; | |
911 | ||
912 | while (getline(&buf, &len, fp) > 0) { | |
913 | ret = strncmp(buf, "MemTotal:", 9); | |
914 | if (!ret) | |
915 | break; | |
916 | } | |
917 | if (!ret) { | |
918 | n = sscanf(buf, "%*s %"PRIu64, &mem); | |
919 | if (n == 1) | |
920 | ret = do_write(fd, &mem, sizeof(mem)); | |
921 | } | |
922 | free(buf); | |
923 | fclose(fp); | |
924 | return ret; | |
925 | } | |
926 | ||
927 | static int write_topo_node(int fd, int node) | |
928 | { | |
929 | char str[MAXPATHLEN]; | |
930 | char field[32]; | |
931 | char *buf = NULL, *p; | |
932 | size_t len = 0; | |
933 | FILE *fp; | |
934 | u64 mem_total, mem_free, mem; | |
935 | int ret = -1; | |
936 | ||
937 | sprintf(str, "/sys/devices/system/node/node%d/meminfo", node); | |
938 | fp = fopen(str, "r"); | |
939 | if (!fp) | |
940 | return -1; | |
941 | ||
942 | while (getline(&buf, &len, fp) > 0) { | |
943 | /* skip over invalid lines */ | |
944 | if (!strchr(buf, ':')) | |
945 | continue; | |
946 | if (sscanf(buf, "%*s %*d %s %"PRIu64, field, &mem) != 2) | |
947 | goto done; | |
948 | if (!strcmp(field, "MemTotal:")) | |
949 | mem_total = mem; | |
950 | if (!strcmp(field, "MemFree:")) | |
951 | mem_free = mem; | |
952 | } | |
953 | ||
954 | fclose(fp); | |
955 | ||
956 | ret = do_write(fd, &mem_total, sizeof(u64)); | |
957 | if (ret) | |
958 | goto done; | |
959 | ||
960 | ret = do_write(fd, &mem_free, sizeof(u64)); | |
961 | if (ret) | |
962 | goto done; | |
963 | ||
964 | ret = -1; | |
965 | sprintf(str, "/sys/devices/system/node/node%d/cpulist", node); | |
966 | ||
967 | fp = fopen(str, "r"); | |
968 | if (!fp) | |
969 | goto done; | |
970 | ||
971 | if (getline(&buf, &len, fp) <= 0) | |
972 | goto done; | |
973 | ||
974 | p = strchr(buf, '\n'); | |
975 | if (p) | |
976 | *p = '\0'; | |
977 | ||
978 | ret = do_write_string(fd, buf); | |
979 | done: | |
980 | free(buf); | |
981 | fclose(fp); | |
982 | return ret; | |
983 | } | |
984 | ||
985 | static int write_numa_topology(int fd, struct perf_header *h __used, | |
986 | struct perf_evlist *evlist __used) | |
987 | { | |
988 | char *buf = NULL; | |
989 | size_t len = 0; | |
990 | FILE *fp; | |
991 | struct cpu_map *node_map = NULL; | |
992 | char *c; | |
993 | u32 nr, i, j; | |
994 | int ret = -1; | |
995 | ||
996 | fp = fopen("/sys/devices/system/node/online", "r"); | |
997 | if (!fp) | |
998 | return -1; | |
999 | ||
1000 | if (getline(&buf, &len, fp) <= 0) | |
1001 | goto done; | |
1002 | ||
1003 | c = strchr(buf, '\n'); | |
1004 | if (c) | |
1005 | *c = '\0'; | |
1006 | ||
1007 | node_map = cpu_map__new(buf); | |
1008 | if (!node_map) | |
1009 | goto done; | |
1010 | ||
1011 | nr = (u32)node_map->nr; | |
1012 | ||
1013 | ret = do_write(fd, &nr, sizeof(nr)); | |
1014 | if (ret < 0) | |
1015 | goto done; | |
1016 | ||
1017 | for (i = 0; i < nr; i++) { | |
1018 | j = (u32)node_map->map[i]; | |
1019 | ret = do_write(fd, &j, sizeof(j)); | |
1020 | if (ret < 0) | |
1021 | break; | |
1022 | ||
1023 | ret = write_topo_node(fd, i); | |
1024 | if (ret < 0) | |
1025 | break; | |
1026 | } | |
1027 | done: | |
1028 | free(buf); | |
1029 | fclose(fp); | |
1030 | free(node_map); | |
1031 | return ret; | |
1032 | } | |
1033 | ||
50a9667c RR |
1034 | /* |
1035 | * File format: | |
1036 | * | |
1037 | * struct pmu_mappings { | |
1038 | * u32 pmu_num; | |
1039 | * struct pmu_map { | |
1040 | * u32 type; | |
1041 | * char name[]; | |
1042 | * }[pmu_num]; | |
1043 | * }; | |
1044 | */ | |
1045 | ||
1046 | static int write_pmu_mappings(int fd, struct perf_header *h __used, | |
1047 | struct perf_evlist *evlist __used) | |
1048 | { | |
1049 | struct perf_pmu *pmu = NULL; | |
1050 | off_t offset = lseek(fd, 0, SEEK_CUR); | |
1051 | __u32 pmu_num = 0; | |
1052 | ||
1053 | /* write real pmu_num later */ | |
1054 | do_write(fd, &pmu_num, sizeof(pmu_num)); | |
1055 | ||
1056 | while ((pmu = perf_pmu__scan(pmu))) { | |
1057 | if (!pmu->name) | |
1058 | continue; | |
1059 | pmu_num++; | |
1060 | do_write(fd, &pmu->type, sizeof(pmu->type)); | |
1061 | do_write_string(fd, pmu->name); | |
1062 | } | |
1063 | ||
1064 | if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) { | |
1065 | /* discard all */ | |
1066 | lseek(fd, offset, SEEK_SET); | |
1067 | return -1; | |
1068 | } | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
fbe96f29 SE |
1073 | /* |
1074 | * default get_cpuid(): nothing gets recorded | |
1075 | * actual implementation must be in arch/$(ARCH)/util/header.c | |
1076 | */ | |
1077 | int __attribute__((weak)) get_cpuid(char *buffer __used, size_t sz __used) | |
1078 | { | |
1079 | return -1; | |
1080 | } | |
1081 | ||
1082 | static int write_cpuid(int fd, struct perf_header *h __used, | |
1083 | struct perf_evlist *evlist __used) | |
1084 | { | |
1085 | char buffer[64]; | |
1086 | int ret; | |
1087 | ||
1088 | ret = get_cpuid(buffer, sizeof(buffer)); | |
1089 | if (!ret) | |
1090 | goto write_it; | |
1091 | ||
1092 | return -1; | |
1093 | write_it: | |
1094 | return do_write_string(fd, buffer); | |
1095 | } | |
1096 | ||
330aa675 SE |
1097 | static int write_branch_stack(int fd __used, struct perf_header *h __used, |
1098 | struct perf_evlist *evlist __used) | |
1099 | { | |
1100 | return 0; | |
1101 | } | |
1102 | ||
fbe96f29 SE |
1103 | static void print_hostname(struct perf_header *ph, int fd, FILE *fp) |
1104 | { | |
1105 | char *str = do_read_string(fd, ph); | |
1106 | fprintf(fp, "# hostname : %s\n", str); | |
1107 | free(str); | |
1108 | } | |
1109 | ||
1110 | static void print_osrelease(struct perf_header *ph, int fd, FILE *fp) | |
1111 | { | |
1112 | char *str = do_read_string(fd, ph); | |
1113 | fprintf(fp, "# os release : %s\n", str); | |
1114 | free(str); | |
1115 | } | |
1116 | ||
1117 | static void print_arch(struct perf_header *ph, int fd, FILE *fp) | |
1118 | { | |
1119 | char *str = do_read_string(fd, ph); | |
1120 | fprintf(fp, "# arch : %s\n", str); | |
1121 | free(str); | |
1122 | } | |
1123 | ||
1124 | static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp) | |
1125 | { | |
1126 | char *str = do_read_string(fd, ph); | |
1127 | fprintf(fp, "# cpudesc : %s\n", str); | |
1128 | free(str); | |
1129 | } | |
1130 | ||
1131 | static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp) | |
1132 | { | |
1133 | ssize_t ret; | |
1134 | u32 nr; | |
1135 | ||
1136 | ret = read(fd, &nr, sizeof(nr)); | |
1137 | if (ret != (ssize_t)sizeof(nr)) | |
1138 | nr = -1; /* interpreted as error */ | |
1139 | ||
1140 | if (ph->needs_swap) | |
1141 | nr = bswap_32(nr); | |
1142 | ||
1143 | fprintf(fp, "# nrcpus online : %u\n", nr); | |
1144 | ||
1145 | ret = read(fd, &nr, sizeof(nr)); | |
1146 | if (ret != (ssize_t)sizeof(nr)) | |
1147 | nr = -1; /* interpreted as error */ | |
1148 | ||
1149 | if (ph->needs_swap) | |
1150 | nr = bswap_32(nr); | |
1151 | ||
1152 | fprintf(fp, "# nrcpus avail : %u\n", nr); | |
1153 | } | |
1154 | ||
1155 | static void print_version(struct perf_header *ph, int fd, FILE *fp) | |
1156 | { | |
1157 | char *str = do_read_string(fd, ph); | |
1158 | fprintf(fp, "# perf version : %s\n", str); | |
1159 | free(str); | |
1160 | } | |
1161 | ||
1162 | static void print_cmdline(struct perf_header *ph, int fd, FILE *fp) | |
1163 | { | |
1164 | ssize_t ret; | |
1165 | char *str; | |
1166 | u32 nr, i; | |
1167 | ||
1168 | ret = read(fd, &nr, sizeof(nr)); | |
1169 | if (ret != (ssize_t)sizeof(nr)) | |
1170 | return; | |
1171 | ||
1172 | if (ph->needs_swap) | |
1173 | nr = bswap_32(nr); | |
1174 | ||
1175 | fprintf(fp, "# cmdline : "); | |
1176 | ||
1177 | for (i = 0; i < nr; i++) { | |
1178 | str = do_read_string(fd, ph); | |
1179 | fprintf(fp, "%s ", str); | |
1180 | free(str); | |
1181 | } | |
1182 | fputc('\n', fp); | |
1183 | } | |
1184 | ||
1185 | static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp) | |
1186 | { | |
1187 | ssize_t ret; | |
1188 | u32 nr, i; | |
1189 | char *str; | |
1190 | ||
1191 | ret = read(fd, &nr, sizeof(nr)); | |
1192 | if (ret != (ssize_t)sizeof(nr)) | |
1193 | return; | |
1194 | ||
1195 | if (ph->needs_swap) | |
1196 | nr = bswap_32(nr); | |
1197 | ||
1198 | for (i = 0; i < nr; i++) { | |
1199 | str = do_read_string(fd, ph); | |
1200 | fprintf(fp, "# sibling cores : %s\n", str); | |
1201 | free(str); | |
1202 | } | |
1203 | ||
1204 | ret = read(fd, &nr, sizeof(nr)); | |
1205 | if (ret != (ssize_t)sizeof(nr)) | |
1206 | return; | |
1207 | ||
1208 | if (ph->needs_swap) | |
1209 | nr = bswap_32(nr); | |
1210 | ||
1211 | for (i = 0; i < nr; i++) { | |
1212 | str = do_read_string(fd, ph); | |
1213 | fprintf(fp, "# sibling threads : %s\n", str); | |
1214 | free(str); | |
1215 | } | |
1216 | } | |
1217 | ||
4e1b9c67 | 1218 | static void free_event_desc(struct perf_evsel *events) |
fbe96f29 | 1219 | { |
4e1b9c67 RR |
1220 | struct perf_evsel *evsel; |
1221 | ||
1222 | if (!events) | |
1223 | return; | |
1224 | ||
1225 | for (evsel = events; evsel->attr.size; evsel++) { | |
1226 | if (evsel->name) | |
1227 | free(evsel->name); | |
1228 | if (evsel->id) | |
1229 | free(evsel->id); | |
1230 | } | |
1231 | ||
1232 | free(events); | |
1233 | } | |
1234 | ||
1235 | static struct perf_evsel * | |
1236 | read_event_desc(struct perf_header *ph, int fd) | |
1237 | { | |
1238 | struct perf_evsel *evsel, *events = NULL; | |
1239 | u64 *id; | |
fbe96f29 | 1240 | void *buf = NULL; |
62db9068 SE |
1241 | u32 nre, sz, nr, i, j; |
1242 | ssize_t ret; | |
1243 | size_t msz; | |
fbe96f29 SE |
1244 | |
1245 | /* number of events */ | |
1246 | ret = read(fd, &nre, sizeof(nre)); | |
1247 | if (ret != (ssize_t)sizeof(nre)) | |
1248 | goto error; | |
1249 | ||
1250 | if (ph->needs_swap) | |
1251 | nre = bswap_32(nre); | |
1252 | ||
1253 | ret = read(fd, &sz, sizeof(sz)); | |
1254 | if (ret != (ssize_t)sizeof(sz)) | |
1255 | goto error; | |
1256 | ||
1257 | if (ph->needs_swap) | |
1258 | sz = bswap_32(sz); | |
1259 | ||
62db9068 | 1260 | /* buffer to hold on file attr struct */ |
fbe96f29 SE |
1261 | buf = malloc(sz); |
1262 | if (!buf) | |
1263 | goto error; | |
1264 | ||
4e1b9c67 RR |
1265 | /* the last event terminates with evsel->attr.size == 0: */ |
1266 | events = calloc(nre + 1, sizeof(*events)); | |
1267 | if (!events) | |
1268 | goto error; | |
1269 | ||
1270 | msz = sizeof(evsel->attr); | |
9fafd98f | 1271 | if (sz < msz) |
fbe96f29 SE |
1272 | msz = sz; |
1273 | ||
4e1b9c67 RR |
1274 | for (i = 0, evsel = events; i < nre; evsel++, i++) { |
1275 | evsel->idx = i; | |
fbe96f29 | 1276 | |
62db9068 SE |
1277 | /* |
1278 | * must read entire on-file attr struct to | |
1279 | * sync up with layout. | |
1280 | */ | |
fbe96f29 SE |
1281 | ret = read(fd, buf, sz); |
1282 | if (ret != (ssize_t)sz) | |
1283 | goto error; | |
1284 | ||
1285 | if (ph->needs_swap) | |
1286 | perf_event__attr_swap(buf); | |
1287 | ||
4e1b9c67 | 1288 | memcpy(&evsel->attr, buf, msz); |
fbe96f29 SE |
1289 | |
1290 | ret = read(fd, &nr, sizeof(nr)); | |
1291 | if (ret != (ssize_t)sizeof(nr)) | |
1292 | goto error; | |
1293 | ||
1294 | if (ph->needs_swap) | |
1295 | nr = bswap_32(nr); | |
1296 | ||
4e1b9c67 RR |
1297 | evsel->name = do_read_string(fd, ph); |
1298 | ||
1299 | if (!nr) | |
1300 | continue; | |
1301 | ||
1302 | id = calloc(nr, sizeof(*id)); | |
1303 | if (!id) | |
1304 | goto error; | |
1305 | evsel->ids = nr; | |
1306 | evsel->id = id; | |
1307 | ||
1308 | for (j = 0 ; j < nr; j++) { | |
1309 | ret = read(fd, id, sizeof(*id)); | |
1310 | if (ret != (ssize_t)sizeof(*id)) | |
1311 | goto error; | |
1312 | if (ph->needs_swap) | |
1313 | *id = bswap_64(*id); | |
1314 | id++; | |
1315 | } | |
1316 | } | |
1317 | out: | |
1318 | if (buf) | |
1319 | free(buf); | |
1320 | return events; | |
1321 | error: | |
1322 | if (events) | |
1323 | free_event_desc(events); | |
1324 | events = NULL; | |
1325 | goto out; | |
1326 | } | |
1327 | ||
1328 | static void print_event_desc(struct perf_header *ph, int fd, FILE *fp) | |
1329 | { | |
1330 | struct perf_evsel *evsel, *events = read_event_desc(ph, fd); | |
1331 | u32 j; | |
1332 | u64 *id; | |
1333 | ||
1334 | if (!events) { | |
1335 | fprintf(fp, "# event desc: not available or unable to read\n"); | |
1336 | return; | |
1337 | } | |
1338 | ||
1339 | for (evsel = events; evsel->attr.size; evsel++) { | |
1340 | fprintf(fp, "# event : name = %s, ", evsel->name); | |
fbe96f29 SE |
1341 | |
1342 | fprintf(fp, "type = %d, config = 0x%"PRIx64 | |
1343 | ", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64, | |
4e1b9c67 RR |
1344 | evsel->attr.type, |
1345 | (u64)evsel->attr.config, | |
1346 | (u64)evsel->attr.config1, | |
1347 | (u64)evsel->attr.config2); | |
fbe96f29 SE |
1348 | |
1349 | fprintf(fp, ", excl_usr = %d, excl_kern = %d", | |
4e1b9c67 RR |
1350 | evsel->attr.exclude_user, |
1351 | evsel->attr.exclude_kernel); | |
fbe96f29 | 1352 | |
78b961ff | 1353 | fprintf(fp, ", excl_host = %d, excl_guest = %d", |
4e1b9c67 RR |
1354 | evsel->attr.exclude_host, |
1355 | evsel->attr.exclude_guest); | |
78b961ff | 1356 | |
4e1b9c67 | 1357 | fprintf(fp, ", precise_ip = %d", evsel->attr.precise_ip); |
78b961ff | 1358 | |
4e1b9c67 | 1359 | if (evsel->ids) { |
fbe96f29 | 1360 | fprintf(fp, ", id = {"); |
4e1b9c67 RR |
1361 | for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) { |
1362 | if (j) | |
1363 | fputc(',', fp); | |
1364 | fprintf(fp, " %"PRIu64, *id); | |
1365 | } | |
fbe96f29 | 1366 | fprintf(fp, " }"); |
4e1b9c67 RR |
1367 | } |
1368 | ||
fbe96f29 SE |
1369 | fputc('\n', fp); |
1370 | } | |
4e1b9c67 RR |
1371 | |
1372 | free_event_desc(events); | |
fbe96f29 SE |
1373 | } |
1374 | ||
1375 | static void print_total_mem(struct perf_header *h __used, int fd, FILE *fp) | |
1376 | { | |
1377 | uint64_t mem; | |
1378 | ssize_t ret; | |
1379 | ||
1380 | ret = read(fd, &mem, sizeof(mem)); | |
1381 | if (ret != sizeof(mem)) | |
1382 | goto error; | |
1383 | ||
1384 | if (h->needs_swap) | |
1385 | mem = bswap_64(mem); | |
1386 | ||
1387 | fprintf(fp, "# total memory : %"PRIu64" kB\n", mem); | |
1388 | return; | |
1389 | error: | |
1390 | fprintf(fp, "# total memory : unknown\n"); | |
1391 | } | |
1392 | ||
1393 | static void print_numa_topology(struct perf_header *h __used, int fd, FILE *fp) | |
1394 | { | |
1395 | ssize_t ret; | |
1396 | u32 nr, c, i; | |
1397 | char *str; | |
1398 | uint64_t mem_total, mem_free; | |
1399 | ||
1400 | /* nr nodes */ | |
1401 | ret = read(fd, &nr, sizeof(nr)); | |
1402 | if (ret != (ssize_t)sizeof(nr)) | |
1403 | goto error; | |
1404 | ||
1405 | if (h->needs_swap) | |
1406 | nr = bswap_32(nr); | |
1407 | ||
1408 | for (i = 0; i < nr; i++) { | |
1409 | ||
1410 | /* node number */ | |
1411 | ret = read(fd, &c, sizeof(c)); | |
1412 | if (ret != (ssize_t)sizeof(c)) | |
1413 | goto error; | |
1414 | ||
1415 | if (h->needs_swap) | |
1416 | c = bswap_32(c); | |
1417 | ||
1418 | ret = read(fd, &mem_total, sizeof(u64)); | |
1419 | if (ret != sizeof(u64)) | |
1420 | goto error; | |
1421 | ||
1422 | ret = read(fd, &mem_free, sizeof(u64)); | |
1423 | if (ret != sizeof(u64)) | |
1424 | goto error; | |
1425 | ||
1426 | if (h->needs_swap) { | |
1427 | mem_total = bswap_64(mem_total); | |
1428 | mem_free = bswap_64(mem_free); | |
1429 | } | |
1430 | ||
1431 | fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB," | |
1432 | " free = %"PRIu64" kB\n", | |
1433 | c, | |
1434 | mem_total, | |
1435 | mem_free); | |
1436 | ||
1437 | str = do_read_string(fd, h); | |
1438 | fprintf(fp, "# node%u cpu list : %s\n", c, str); | |
1439 | free(str); | |
1440 | } | |
1441 | return; | |
1442 | error: | |
1443 | fprintf(fp, "# numa topology : not available\n"); | |
1444 | } | |
1445 | ||
1446 | static void print_cpuid(struct perf_header *ph, int fd, FILE *fp) | |
1447 | { | |
1448 | char *str = do_read_string(fd, ph); | |
1449 | fprintf(fp, "# cpuid : %s\n", str); | |
1450 | free(str); | |
1451 | } | |
1452 | ||
330aa675 SE |
1453 | static void print_branch_stack(struct perf_header *ph __used, int fd __used, |
1454 | FILE *fp) | |
1455 | { | |
1456 | fprintf(fp, "# contains samples with branch stack\n"); | |
1457 | } | |
1458 | ||
50a9667c RR |
1459 | static void print_pmu_mappings(struct perf_header *ph, int fd, FILE *fp) |
1460 | { | |
1461 | const char *delimiter = "# pmu mappings: "; | |
1462 | char *name; | |
1463 | int ret; | |
1464 | u32 pmu_num; | |
1465 | u32 type; | |
1466 | ||
1467 | ret = read(fd, &pmu_num, sizeof(pmu_num)); | |
1468 | if (ret != sizeof(pmu_num)) | |
1469 | goto error; | |
1470 | ||
be4a2ded NK |
1471 | if (ph->needs_swap) |
1472 | pmu_num = bswap_32(pmu_num); | |
1473 | ||
50a9667c RR |
1474 | if (!pmu_num) { |
1475 | fprintf(fp, "# pmu mappings: not available\n"); | |
1476 | return; | |
1477 | } | |
1478 | ||
1479 | while (pmu_num) { | |
1480 | if (read(fd, &type, sizeof(type)) != sizeof(type)) | |
1481 | break; | |
be4a2ded NK |
1482 | if (ph->needs_swap) |
1483 | type = bswap_32(type); | |
1484 | ||
50a9667c RR |
1485 | name = do_read_string(fd, ph); |
1486 | if (!name) | |
1487 | break; | |
1488 | pmu_num--; | |
1489 | fprintf(fp, "%s%s = %" PRIu32, delimiter, name, type); | |
1490 | free(name); | |
1491 | delimiter = ", "; | |
1492 | } | |
1493 | ||
1494 | fprintf(fp, "\n"); | |
1495 | ||
1496 | if (!pmu_num) | |
1497 | return; | |
1498 | error: | |
1499 | fprintf(fp, "# pmu mappings: unable to read\n"); | |
1500 | } | |
1501 | ||
08d95bd2 RR |
1502 | static int __event_process_build_id(struct build_id_event *bev, |
1503 | char *filename, | |
1504 | struct perf_session *session) | |
1505 | { | |
1506 | int err = -1; | |
1507 | struct list_head *head; | |
1508 | struct machine *machine; | |
1509 | u16 misc; | |
1510 | struct dso *dso; | |
1511 | enum dso_kernel_type dso_type; | |
1512 | ||
1513 | machine = perf_session__findnew_machine(session, bev->pid); | |
1514 | if (!machine) | |
1515 | goto out; | |
1516 | ||
1517 | misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1518 | ||
1519 | switch (misc) { | |
1520 | case PERF_RECORD_MISC_KERNEL: | |
1521 | dso_type = DSO_TYPE_KERNEL; | |
1522 | head = &machine->kernel_dsos; | |
1523 | break; | |
1524 | case PERF_RECORD_MISC_GUEST_KERNEL: | |
1525 | dso_type = DSO_TYPE_GUEST_KERNEL; | |
1526 | head = &machine->kernel_dsos; | |
1527 | break; | |
1528 | case PERF_RECORD_MISC_USER: | |
1529 | case PERF_RECORD_MISC_GUEST_USER: | |
1530 | dso_type = DSO_TYPE_USER; | |
1531 | head = &machine->user_dsos; | |
1532 | break; | |
1533 | default: | |
1534 | goto out; | |
1535 | } | |
1536 | ||
1537 | dso = __dsos__findnew(head, filename); | |
1538 | if (dso != NULL) { | |
1539 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1540 | ||
1541 | dso__set_build_id(dso, &bev->build_id); | |
1542 | ||
1543 | if (filename[0] == '[') | |
1544 | dso->kernel = dso_type; | |
1545 | ||
1546 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), | |
1547 | sbuild_id); | |
1548 | pr_debug("build id event received for %s: %s\n", | |
1549 | dso->long_name, sbuild_id); | |
1550 | } | |
1551 | ||
1552 | err = 0; | |
1553 | out: | |
1554 | return err; | |
1555 | } | |
1556 | ||
1557 | static int perf_header__read_build_ids_abi_quirk(struct perf_header *header, | |
1558 | int input, u64 offset, u64 size) | |
1559 | { | |
1560 | struct perf_session *session = container_of(header, struct perf_session, header); | |
1561 | struct { | |
1562 | struct perf_event_header header; | |
9ac3e487 | 1563 | u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))]; |
08d95bd2 RR |
1564 | char filename[0]; |
1565 | } old_bev; | |
1566 | struct build_id_event bev; | |
1567 | char filename[PATH_MAX]; | |
1568 | u64 limit = offset + size; | |
1569 | ||
1570 | while (offset < limit) { | |
1571 | ssize_t len; | |
1572 | ||
1573 | if (read(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev)) | |
1574 | return -1; | |
1575 | ||
1576 | if (header->needs_swap) | |
1577 | perf_event_header__bswap(&old_bev.header); | |
1578 | ||
1579 | len = old_bev.header.size - sizeof(old_bev); | |
1580 | if (read(input, filename, len) != len) | |
1581 | return -1; | |
1582 | ||
1583 | bev.header = old_bev.header; | |
1584 | ||
1585 | /* | |
1586 | * As the pid is the missing value, we need to fill | |
1587 | * it properly. The header.misc value give us nice hint. | |
1588 | */ | |
1589 | bev.pid = HOST_KERNEL_ID; | |
1590 | if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER || | |
1591 | bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL) | |
1592 | bev.pid = DEFAULT_GUEST_KERNEL_ID; | |
1593 | ||
1594 | memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id)); | |
1595 | __event_process_build_id(&bev, filename, session); | |
1596 | ||
1597 | offset += bev.header.size; | |
1598 | } | |
1599 | ||
1600 | return 0; | |
1601 | } | |
1602 | ||
1603 | static int perf_header__read_build_ids(struct perf_header *header, | |
1604 | int input, u64 offset, u64 size) | |
1605 | { | |
1606 | struct perf_session *session = container_of(header, struct perf_session, header); | |
1607 | struct build_id_event bev; | |
1608 | char filename[PATH_MAX]; | |
1609 | u64 limit = offset + size, orig_offset = offset; | |
1610 | int err = -1; | |
1611 | ||
1612 | while (offset < limit) { | |
1613 | ssize_t len; | |
1614 | ||
1615 | if (read(input, &bev, sizeof(bev)) != sizeof(bev)) | |
1616 | goto out; | |
1617 | ||
1618 | if (header->needs_swap) | |
1619 | perf_event_header__bswap(&bev.header); | |
1620 | ||
1621 | len = bev.header.size - sizeof(bev); | |
1622 | if (read(input, filename, len) != len) | |
1623 | goto out; | |
1624 | /* | |
1625 | * The a1645ce1 changeset: | |
1626 | * | |
1627 | * "perf: 'perf kvm' tool for monitoring guest performance from host" | |
1628 | * | |
1629 | * Added a field to struct build_id_event that broke the file | |
1630 | * format. | |
1631 | * | |
1632 | * Since the kernel build-id is the first entry, process the | |
1633 | * table using the old format if the well known | |
1634 | * '[kernel.kallsyms]' string for the kernel build-id has the | |
1635 | * first 4 characters chopped off (where the pid_t sits). | |
1636 | */ | |
1637 | if (memcmp(filename, "nel.kallsyms]", 13) == 0) { | |
1638 | if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1) | |
1639 | return -1; | |
1640 | return perf_header__read_build_ids_abi_quirk(header, input, offset, size); | |
1641 | } | |
1642 | ||
1643 | __event_process_build_id(&bev, filename, session); | |
1644 | ||
1645 | offset += bev.header.size; | |
1646 | } | |
1647 | err = 0; | |
1648 | out: | |
1649 | return err; | |
1650 | } | |
1651 | ||
2eeaaa09 | 1652 | static int process_tracing_data(struct perf_file_section *section __unused, |
f1c67db7 | 1653 | struct perf_header *ph __unused, |
da378962 | 1654 | int feat __unused, int fd, void *data) |
f1c67db7 | 1655 | { |
da378962 | 1656 | trace_report(fd, data, false); |
f1c67db7 RR |
1657 | return 0; |
1658 | } | |
1659 | ||
1660 | static int process_build_id(struct perf_file_section *section, | |
1661 | struct perf_header *ph, | |
da378962 | 1662 | int feat __unused, int fd, void *data __used) |
f1c67db7 RR |
1663 | { |
1664 | if (perf_header__read_build_ids(ph, fd, section->offset, section->size)) | |
1665 | pr_debug("Failed to read buildids, continuing...\n"); | |
1666 | return 0; | |
1667 | } | |
1668 | ||
7c2f7afd RR |
1669 | static struct perf_evsel * |
1670 | perf_evlist__find_by_index(struct perf_evlist *evlist, int idx) | |
1671 | { | |
1672 | struct perf_evsel *evsel; | |
1673 | ||
1674 | list_for_each_entry(evsel, &evlist->entries, node) { | |
1675 | if (evsel->idx == idx) | |
1676 | return evsel; | |
1677 | } | |
1678 | ||
1679 | return NULL; | |
1680 | } | |
1681 | ||
1682 | static void | |
1683 | perf_evlist__set_event_name(struct perf_evlist *evlist, struct perf_evsel *event) | |
1684 | { | |
1685 | struct perf_evsel *evsel; | |
1686 | ||
1687 | if (!event->name) | |
1688 | return; | |
1689 | ||
1690 | evsel = perf_evlist__find_by_index(evlist, event->idx); | |
1691 | if (!evsel) | |
1692 | return; | |
1693 | ||
1694 | if (evsel->name) | |
1695 | return; | |
1696 | ||
1697 | evsel->name = strdup(event->name); | |
1698 | } | |
1699 | ||
1700 | static int | |
1701 | process_event_desc(struct perf_file_section *section __unused, | |
1702 | struct perf_header *header, int feat __unused, int fd, | |
1703 | void *data __used) | |
1704 | { | |
1705 | struct perf_session *session = container_of(header, struct perf_session, header); | |
1706 | struct perf_evsel *evsel, *events = read_event_desc(header, fd); | |
1707 | ||
1708 | if (!events) | |
1709 | return 0; | |
1710 | ||
1711 | for (evsel = events; evsel->attr.size; evsel++) | |
1712 | perf_evlist__set_event_name(session->evlist, evsel); | |
1713 | ||
1714 | free_event_desc(events); | |
1715 | ||
1716 | return 0; | |
1717 | } | |
1718 | ||
fbe96f29 SE |
1719 | struct feature_ops { |
1720 | int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist); | |
1721 | void (*print)(struct perf_header *h, int fd, FILE *fp); | |
f1c67db7 | 1722 | int (*process)(struct perf_file_section *section, |
da378962 | 1723 | struct perf_header *h, int feat, int fd, void *data); |
fbe96f29 SE |
1724 | const char *name; |
1725 | bool full_only; | |
1726 | }; | |
1727 | ||
8cdfa78a RR |
1728 | #define FEAT_OPA(n, func) \ |
1729 | [n] = { .name = #n, .write = write_##func, .print = print_##func } | |
f1c67db7 RR |
1730 | #define FEAT_OPP(n, func) \ |
1731 | [n] = { .name = #n, .write = write_##func, .print = print_##func, \ | |
1732 | .process = process_##func } | |
8cdfa78a | 1733 | #define FEAT_OPF(n, func) \ |
f1c67db7 RR |
1734 | [n] = { .name = #n, .write = write_##func, .print = print_##func, \ |
1735 | .full_only = true } | |
8cdfa78a RR |
1736 | |
1737 | /* feature_ops not implemented: */ | |
2eeaaa09 SE |
1738 | #define print_tracing_data NULL |
1739 | #define print_build_id NULL | |
fbe96f29 SE |
1740 | |
1741 | static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = { | |
2eeaaa09 | 1742 | FEAT_OPP(HEADER_TRACING_DATA, tracing_data), |
f1c67db7 | 1743 | FEAT_OPP(HEADER_BUILD_ID, build_id), |
8cdfa78a RR |
1744 | FEAT_OPA(HEADER_HOSTNAME, hostname), |
1745 | FEAT_OPA(HEADER_OSRELEASE, osrelease), | |
1746 | FEAT_OPA(HEADER_VERSION, version), | |
1747 | FEAT_OPA(HEADER_ARCH, arch), | |
1748 | FEAT_OPA(HEADER_NRCPUS, nrcpus), | |
1749 | FEAT_OPA(HEADER_CPUDESC, cpudesc), | |
1750 | FEAT_OPA(HEADER_CPUID, cpuid), | |
1751 | FEAT_OPA(HEADER_TOTAL_MEM, total_mem), | |
7c2f7afd | 1752 | FEAT_OPP(HEADER_EVENT_DESC, event_desc), |
8cdfa78a RR |
1753 | FEAT_OPA(HEADER_CMDLINE, cmdline), |
1754 | FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology), | |
1755 | FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology), | |
330aa675 | 1756 | FEAT_OPA(HEADER_BRANCH_STACK, branch_stack), |
50a9667c | 1757 | FEAT_OPA(HEADER_PMU_MAPPINGS, pmu_mappings), |
fbe96f29 SE |
1758 | }; |
1759 | ||
1760 | struct header_print_data { | |
1761 | FILE *fp; | |
1762 | bool full; /* extended list of headers */ | |
1763 | }; | |
1764 | ||
1765 | static int perf_file_section__fprintf_info(struct perf_file_section *section, | |
1766 | struct perf_header *ph, | |
1767 | int feat, int fd, void *data) | |
1768 | { | |
1769 | struct header_print_data *hd = data; | |
1770 | ||
1771 | if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) { | |
1772 | pr_debug("Failed to lseek to %" PRIu64 " offset for feature " | |
1773 | "%d, continuing...\n", section->offset, feat); | |
1774 | return 0; | |
1775 | } | |
b1e5a9be | 1776 | if (feat >= HEADER_LAST_FEATURE) { |
fbe96f29 | 1777 | pr_warning("unknown feature %d\n", feat); |
f7a8a133 | 1778 | return 0; |
fbe96f29 SE |
1779 | } |
1780 | if (!feat_ops[feat].print) | |
1781 | return 0; | |
1782 | ||
1783 | if (!feat_ops[feat].full_only || hd->full) | |
1784 | feat_ops[feat].print(ph, fd, hd->fp); | |
1785 | else | |
1786 | fprintf(hd->fp, "# %s info available, use -I to display\n", | |
1787 | feat_ops[feat].name); | |
1788 | ||
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full) | |
1793 | { | |
1794 | struct header_print_data hd; | |
1795 | struct perf_header *header = &session->header; | |
1796 | int fd = session->fd; | |
1797 | hd.fp = fp; | |
1798 | hd.full = full; | |
1799 | ||
1800 | perf_header__process_sections(header, fd, &hd, | |
1801 | perf_file_section__fprintf_info); | |
1802 | return 0; | |
1803 | } | |
1804 | ||
fbe96f29 SE |
1805 | static int do_write_feat(int fd, struct perf_header *h, int type, |
1806 | struct perf_file_section **p, | |
1807 | struct perf_evlist *evlist) | |
1808 | { | |
1809 | int err; | |
1810 | int ret = 0; | |
1811 | ||
1812 | if (perf_header__has_feat(h, type)) { | |
b1e5a9be RR |
1813 | if (!feat_ops[type].write) |
1814 | return -1; | |
fbe96f29 SE |
1815 | |
1816 | (*p)->offset = lseek(fd, 0, SEEK_CUR); | |
1817 | ||
1818 | err = feat_ops[type].write(fd, h, evlist); | |
1819 | if (err < 0) { | |
1820 | pr_debug("failed to write feature %d\n", type); | |
1821 | ||
1822 | /* undo anything written */ | |
1823 | lseek(fd, (*p)->offset, SEEK_SET); | |
1824 | ||
1825 | return -1; | |
1826 | } | |
1827 | (*p)->size = lseek(fd, 0, SEEK_CUR) - (*p)->offset; | |
1828 | (*p)++; | |
1829 | } | |
1830 | return ret; | |
1831 | } | |
1832 | ||
1c0b04d1 | 1833 | static int perf_header__adds_write(struct perf_header *header, |
361c99a6 | 1834 | struct perf_evlist *evlist, int fd) |
2ba08250 | 1835 | { |
9e827dd0 | 1836 | int nr_sections; |
fbe96f29 | 1837 | struct perf_file_section *feat_sec, *p; |
9e827dd0 FW |
1838 | int sec_size; |
1839 | u64 sec_start; | |
b1e5a9be | 1840 | int feat; |
fbe96f29 | 1841 | int err; |
9e827dd0 | 1842 | |
1c0b04d1 | 1843 | nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS); |
9e827dd0 | 1844 | if (!nr_sections) |
d5eed904 | 1845 | return 0; |
9e827dd0 | 1846 | |
fbe96f29 | 1847 | feat_sec = p = calloc(sizeof(*feat_sec), nr_sections); |
d5eed904 ACM |
1848 | if (feat_sec == NULL) |
1849 | return -ENOMEM; | |
9e827dd0 FW |
1850 | |
1851 | sec_size = sizeof(*feat_sec) * nr_sections; | |
1852 | ||
1c0b04d1 | 1853 | sec_start = header->data_offset + header->data_size; |
f887f301 | 1854 | lseek(fd, sec_start + sec_size, SEEK_SET); |
2ba08250 | 1855 | |
b1e5a9be RR |
1856 | for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { |
1857 | if (do_write_feat(fd, header, feat, &p, evlist)) | |
1858 | perf_header__clear_feat(header, feat); | |
1859 | } | |
9e827dd0 | 1860 | |
f887f301 | 1861 | lseek(fd, sec_start, SEEK_SET); |
fbe96f29 SE |
1862 | /* |
1863 | * may write more than needed due to dropped feature, but | |
1864 | * this is okay, reader will skip the mising entries | |
1865 | */ | |
d5eed904 ACM |
1866 | err = do_write(fd, feat_sec, sec_size); |
1867 | if (err < 0) | |
1868 | pr_debug("failed to write feature section\n"); | |
9e827dd0 | 1869 | free(feat_sec); |
d5eed904 | 1870 | return err; |
9e827dd0 | 1871 | } |
2ba08250 | 1872 | |
8dc58101 TZ |
1873 | int perf_header__write_pipe(int fd) |
1874 | { | |
1875 | struct perf_pipe_file_header f_header; | |
1876 | int err; | |
1877 | ||
1878 | f_header = (struct perf_pipe_file_header){ | |
1879 | .magic = PERF_MAGIC, | |
1880 | .size = sizeof(f_header), | |
1881 | }; | |
1882 | ||
1883 | err = do_write(fd, &f_header, sizeof(f_header)); | |
1884 | if (err < 0) { | |
1885 | pr_debug("failed to write perf pipe header\n"); | |
1886 | return err; | |
1887 | } | |
1888 | ||
1889 | return 0; | |
1890 | } | |
1891 | ||
a91e5431 ACM |
1892 | int perf_session__write_header(struct perf_session *session, |
1893 | struct perf_evlist *evlist, | |
1894 | int fd, bool at_exit) | |
7c6a1c65 PZ |
1895 | { |
1896 | struct perf_file_header f_header; | |
1897 | struct perf_file_attr f_attr; | |
1c0b04d1 | 1898 | struct perf_header *header = &session->header; |
6606f873 | 1899 | struct perf_evsel *evsel, *pair = NULL; |
a91e5431 | 1900 | int err; |
7c6a1c65 PZ |
1901 | |
1902 | lseek(fd, sizeof(f_header), SEEK_SET); | |
1903 | ||
a91e5431 | 1904 | if (session->evlist != evlist) |
0c21f736 | 1905 | pair = perf_evlist__first(session->evlist); |
7c6a1c65 | 1906 | |
6606f873 RR |
1907 | list_for_each_entry(evsel, &evlist->entries, node) { |
1908 | evsel->id_offset = lseek(fd, 0, SEEK_CUR); | |
1909 | err = do_write(fd, evsel->id, evsel->ids * sizeof(u64)); | |
d5eed904 | 1910 | if (err < 0) { |
a91e5431 | 1911 | out_err_write: |
d5eed904 ACM |
1912 | pr_debug("failed to write perf header\n"); |
1913 | return err; | |
1914 | } | |
a91e5431 ACM |
1915 | if (session->evlist != evlist) { |
1916 | err = do_write(fd, pair->id, pair->ids * sizeof(u64)); | |
1917 | if (err < 0) | |
1918 | goto out_err_write; | |
6606f873 | 1919 | evsel->ids += pair->ids; |
0c21f736 | 1920 | pair = perf_evsel__next(pair); |
a91e5431 | 1921 | } |
7c6a1c65 PZ |
1922 | } |
1923 | ||
1c0b04d1 | 1924 | header->attr_offset = lseek(fd, 0, SEEK_CUR); |
7c6a1c65 | 1925 | |
6606f873 | 1926 | list_for_each_entry(evsel, &evlist->entries, node) { |
7c6a1c65 | 1927 | f_attr = (struct perf_file_attr){ |
6606f873 | 1928 | .attr = evsel->attr, |
7c6a1c65 | 1929 | .ids = { |
6606f873 RR |
1930 | .offset = evsel->id_offset, |
1931 | .size = evsel->ids * sizeof(u64), | |
7c6a1c65 PZ |
1932 | } |
1933 | }; | |
d5eed904 ACM |
1934 | err = do_write(fd, &f_attr, sizeof(f_attr)); |
1935 | if (err < 0) { | |
1936 | pr_debug("failed to write perf header attribute\n"); | |
1937 | return err; | |
1938 | } | |
7c6a1c65 PZ |
1939 | } |
1940 | ||
1c0b04d1 | 1941 | header->event_offset = lseek(fd, 0, SEEK_CUR); |
db146f06 RR |
1942 | header->event_size = trace_event_count * sizeof(struct perf_trace_event_type); |
1943 | if (trace_events) { | |
1944 | err = do_write(fd, trace_events, header->event_size); | |
d5eed904 ACM |
1945 | if (err < 0) { |
1946 | pr_debug("failed to write perf header events\n"); | |
1947 | return err; | |
1948 | } | |
1949 | } | |
8755a8f2 | 1950 | |
1c0b04d1 | 1951 | header->data_offset = lseek(fd, 0, SEEK_CUR); |
7c6a1c65 | 1952 | |
d5eed904 | 1953 | if (at_exit) { |
1c0b04d1 | 1954 | err = perf_header__adds_write(header, evlist, fd); |
d5eed904 ACM |
1955 | if (err < 0) |
1956 | return err; | |
1957 | } | |
9e827dd0 | 1958 | |
7c6a1c65 PZ |
1959 | f_header = (struct perf_file_header){ |
1960 | .magic = PERF_MAGIC, | |
1961 | .size = sizeof(f_header), | |
1962 | .attr_size = sizeof(f_attr), | |
1963 | .attrs = { | |
1c0b04d1 | 1964 | .offset = header->attr_offset, |
a91e5431 | 1965 | .size = evlist->nr_entries * sizeof(f_attr), |
7c6a1c65 PZ |
1966 | }, |
1967 | .data = { | |
1c0b04d1 ACM |
1968 | .offset = header->data_offset, |
1969 | .size = header->data_size, | |
7c6a1c65 | 1970 | }, |
8755a8f2 | 1971 | .event_types = { |
1c0b04d1 ACM |
1972 | .offset = header->event_offset, |
1973 | .size = header->event_size, | |
8755a8f2 | 1974 | }, |
7c6a1c65 PZ |
1975 | }; |
1976 | ||
1c0b04d1 | 1977 | memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features)); |
2ba08250 | 1978 | |
7c6a1c65 | 1979 | lseek(fd, 0, SEEK_SET); |
d5eed904 ACM |
1980 | err = do_write(fd, &f_header, sizeof(f_header)); |
1981 | if (err < 0) { | |
1982 | pr_debug("failed to write perf header\n"); | |
1983 | return err; | |
1984 | } | |
1c0b04d1 | 1985 | lseek(fd, header->data_offset + header->data_size, SEEK_SET); |
7c6a1c65 | 1986 | |
1c0b04d1 | 1987 | header->frozen = 1; |
d5eed904 | 1988 | return 0; |
7c6a1c65 PZ |
1989 | } |
1990 | ||
1c0b04d1 | 1991 | static int perf_header__getbuffer64(struct perf_header *header, |
ba21594c ACM |
1992 | int fd, void *buf, size_t size) |
1993 | { | |
1e7972cc | 1994 | if (readn(fd, buf, size) <= 0) |
ba21594c ACM |
1995 | return -1; |
1996 | ||
1c0b04d1 | 1997 | if (header->needs_swap) |
ba21594c ACM |
1998 | mem_bswap_64(buf, size); |
1999 | ||
2000 | return 0; | |
2001 | } | |
2002 | ||
1c0b04d1 | 2003 | int perf_header__process_sections(struct perf_header *header, int fd, |
fbe96f29 | 2004 | void *data, |
1c0b04d1 | 2005 | int (*process)(struct perf_file_section *section, |
b1e5a9be RR |
2006 | struct perf_header *ph, |
2007 | int feat, int fd, void *data)) | |
2ba08250 | 2008 | { |
b1e5a9be | 2009 | struct perf_file_section *feat_sec, *sec; |
9e827dd0 FW |
2010 | int nr_sections; |
2011 | int sec_size; | |
b1e5a9be RR |
2012 | int feat; |
2013 | int err; | |
9e827dd0 | 2014 | |
1c0b04d1 | 2015 | nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS); |
9e827dd0 | 2016 | if (!nr_sections) |
37562eac | 2017 | return 0; |
9e827dd0 | 2018 | |
b1e5a9be | 2019 | feat_sec = sec = calloc(sizeof(*feat_sec), nr_sections); |
9e827dd0 | 2020 | if (!feat_sec) |
37562eac | 2021 | return -1; |
9e827dd0 FW |
2022 | |
2023 | sec_size = sizeof(*feat_sec) * nr_sections; | |
2024 | ||
1c0b04d1 | 2025 | lseek(fd, header->data_offset + header->data_size, SEEK_SET); |
9e827dd0 | 2026 | |
b1e5a9be RR |
2027 | err = perf_header__getbuffer64(header, fd, feat_sec, sec_size); |
2028 | if (err < 0) | |
769885f3 | 2029 | goto out_free; |
9e827dd0 | 2030 | |
b1e5a9be RR |
2031 | for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) { |
2032 | err = process(sec++, header, feat, fd, data); | |
2033 | if (err < 0) | |
2034 | goto out_free; | |
2ba08250 | 2035 | } |
b1e5a9be | 2036 | err = 0; |
769885f3 | 2037 | out_free: |
37562eac ACM |
2038 | free(feat_sec); |
2039 | return err; | |
769885f3 | 2040 | } |
4778d2e4 | 2041 | |
114382a0 SE |
2042 | static const int attr_file_abi_sizes[] = { |
2043 | [0] = PERF_ATTR_SIZE_VER0, | |
2044 | [1] = PERF_ATTR_SIZE_VER1, | |
239cc478 | 2045 | [2] = PERF_ATTR_SIZE_VER2, |
0f6a3015 | 2046 | [3] = PERF_ATTR_SIZE_VER3, |
114382a0 SE |
2047 | 0, |
2048 | }; | |
2049 | ||
2050 | /* | |
2051 | * In the legacy file format, the magic number is not used to encode endianness. | |
2052 | * hdr_sz was used to encode endianness. But given that hdr_sz can vary based | |
2053 | * on ABI revisions, we need to try all combinations for all endianness to | |
2054 | * detect the endianness. | |
2055 | */ | |
2056 | static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph) | |
73323f54 | 2057 | { |
114382a0 SE |
2058 | uint64_t ref_size, attr_size; |
2059 | int i; | |
73323f54 | 2060 | |
114382a0 SE |
2061 | for (i = 0 ; attr_file_abi_sizes[i]; i++) { |
2062 | ref_size = attr_file_abi_sizes[i] | |
2063 | + sizeof(struct perf_file_section); | |
2064 | if (hdr_sz != ref_size) { | |
2065 | attr_size = bswap_64(hdr_sz); | |
2066 | if (attr_size != ref_size) | |
2067 | continue; | |
73323f54 | 2068 | |
114382a0 SE |
2069 | ph->needs_swap = true; |
2070 | } | |
2071 | pr_debug("ABI%d perf.data file detected, need_swap=%d\n", | |
2072 | i, | |
2073 | ph->needs_swap); | |
2074 | return 0; | |
2075 | } | |
2076 | /* could not determine endianness */ | |
2077 | return -1; | |
2078 | } | |
73323f54 | 2079 | |
114382a0 SE |
2080 | #define PERF_PIPE_HDR_VER0 16 |
2081 | ||
2082 | static const size_t attr_pipe_abi_sizes[] = { | |
2083 | [0] = PERF_PIPE_HDR_VER0, | |
2084 | 0, | |
2085 | }; | |
2086 | ||
2087 | /* | |
2088 | * In the legacy pipe format, there is an implicit assumption that endiannesss | |
2089 | * between host recording the samples, and host parsing the samples is the | |
2090 | * same. This is not always the case given that the pipe output may always be | |
2091 | * redirected into a file and analyzed on a different machine with possibly a | |
2092 | * different endianness and perf_event ABI revsions in the perf tool itself. | |
2093 | */ | |
2094 | static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph) | |
2095 | { | |
2096 | u64 attr_size; | |
2097 | int i; | |
2098 | ||
2099 | for (i = 0 ; attr_pipe_abi_sizes[i]; i++) { | |
2100 | if (hdr_sz != attr_pipe_abi_sizes[i]) { | |
2101 | attr_size = bswap_64(hdr_sz); | |
2102 | if (attr_size != hdr_sz) | |
2103 | continue; | |
73323f54 SE |
2104 | |
2105 | ph->needs_swap = true; | |
2106 | } | |
114382a0 | 2107 | pr_debug("Pipe ABI%d perf.data file detected\n", i); |
73323f54 SE |
2108 | return 0; |
2109 | } | |
114382a0 SE |
2110 | return -1; |
2111 | } | |
2112 | ||
2113 | static int check_magic_endian(u64 magic, uint64_t hdr_sz, | |
2114 | bool is_pipe, struct perf_header *ph) | |
2115 | { | |
2116 | int ret; | |
2117 | ||
2118 | /* check for legacy format */ | |
2119 | ret = memcmp(&magic, __perf_magic1, sizeof(magic)); | |
2120 | if (ret == 0) { | |
2121 | pr_debug("legacy perf.data format\n"); | |
2122 | if (is_pipe) | |
2123 | return try_all_pipe_abis(hdr_sz, ph); | |
2124 | ||
2125 | return try_all_file_abis(hdr_sz, ph); | |
2126 | } | |
2127 | /* | |
2128 | * the new magic number serves two purposes: | |
2129 | * - unique number to identify actual perf.data files | |
2130 | * - encode endianness of file | |
2131 | */ | |
73323f54 | 2132 | |
114382a0 SE |
2133 | /* check magic number with one endianness */ |
2134 | if (magic == __perf_magic2) | |
73323f54 SE |
2135 | return 0; |
2136 | ||
114382a0 SE |
2137 | /* check magic number with opposite endianness */ |
2138 | if (magic != __perf_magic2_sw) | |
73323f54 SE |
2139 | return -1; |
2140 | ||
2141 | ph->needs_swap = true; | |
2142 | ||
2143 | return 0; | |
2144 | } | |
2145 | ||
1c0b04d1 | 2146 | int perf_file_header__read(struct perf_file_header *header, |
37562eac ACM |
2147 | struct perf_header *ph, int fd) |
2148 | { | |
73323f54 SE |
2149 | int ret; |
2150 | ||
37562eac | 2151 | lseek(fd, 0, SEEK_SET); |
37562eac | 2152 | |
73323f54 SE |
2153 | ret = readn(fd, header, sizeof(*header)); |
2154 | if (ret <= 0) | |
37562eac ACM |
2155 | return -1; |
2156 | ||
114382a0 SE |
2157 | if (check_magic_endian(header->magic, |
2158 | header->attr_size, false, ph) < 0) { | |
2159 | pr_debug("magic/endian check failed\n"); | |
73323f54 | 2160 | return -1; |
114382a0 | 2161 | } |
ba21594c | 2162 | |
73323f54 | 2163 | if (ph->needs_swap) { |
1c0b04d1 | 2164 | mem_bswap_64(header, offsetof(struct perf_file_header, |
73323f54 | 2165 | adds_features)); |
ba21594c ACM |
2166 | } |
2167 | ||
1c0b04d1 | 2168 | if (header->size != sizeof(*header)) { |
37562eac | 2169 | /* Support the previous format */ |
1c0b04d1 ACM |
2170 | if (header->size == offsetof(typeof(*header), adds_features)) |
2171 | bitmap_zero(header->adds_features, HEADER_FEAT_BITS); | |
37562eac ACM |
2172 | else |
2173 | return -1; | |
d327fa43 | 2174 | } else if (ph->needs_swap) { |
d327fa43 DA |
2175 | /* |
2176 | * feature bitmap is declared as an array of unsigned longs -- | |
2177 | * not good since its size can differ between the host that | |
2178 | * generated the data file and the host analyzing the file. | |
2179 | * | |
2180 | * We need to handle endianness, but we don't know the size of | |
2181 | * the unsigned long where the file was generated. Take a best | |
2182 | * guess at determining it: try 64-bit swap first (ie., file | |
2183 | * created on a 64-bit host), and check if the hostname feature | |
2184 | * bit is set (this feature bit is forced on as of fbe96f2). | |
2185 | * If the bit is not, undo the 64-bit swap and try a 32-bit | |
2186 | * swap. If the hostname bit is still not set (e.g., older data | |
2187 | * file), punt and fallback to the original behavior -- | |
2188 | * clearing all feature bits and setting buildid. | |
2189 | */ | |
80c0120a DA |
2190 | mem_bswap_64(&header->adds_features, |
2191 | BITS_TO_U64(HEADER_FEAT_BITS)); | |
d327fa43 DA |
2192 | |
2193 | if (!test_bit(HEADER_HOSTNAME, header->adds_features)) { | |
80c0120a DA |
2194 | /* unswap as u64 */ |
2195 | mem_bswap_64(&header->adds_features, | |
2196 | BITS_TO_U64(HEADER_FEAT_BITS)); | |
2197 | ||
2198 | /* unswap as u32 */ | |
2199 | mem_bswap_32(&header->adds_features, | |
2200 | BITS_TO_U32(HEADER_FEAT_BITS)); | |
d327fa43 DA |
2201 | } |
2202 | ||
2203 | if (!test_bit(HEADER_HOSTNAME, header->adds_features)) { | |
2204 | bitmap_zero(header->adds_features, HEADER_FEAT_BITS); | |
2205 | set_bit(HEADER_BUILD_ID, header->adds_features); | |
2206 | } | |
4778d2e4 | 2207 | } |
9e827dd0 | 2208 | |
1c0b04d1 | 2209 | memcpy(&ph->adds_features, &header->adds_features, |
ba21594c | 2210 | sizeof(ph->adds_features)); |
37562eac | 2211 | |
1c0b04d1 ACM |
2212 | ph->event_offset = header->event_types.offset; |
2213 | ph->event_size = header->event_types.size; | |
2214 | ph->data_offset = header->data.offset; | |
2215 | ph->data_size = header->data.size; | |
37562eac ACM |
2216 | return 0; |
2217 | } | |
2218 | ||
1c0b04d1 | 2219 | static int perf_file_section__process(struct perf_file_section *section, |
ba21594c | 2220 | struct perf_header *ph, |
da378962 | 2221 | int feat, int fd, void *data) |
37562eac | 2222 | { |
1c0b04d1 | 2223 | if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) { |
9486aa38 | 2224 | pr_debug("Failed to lseek to %" PRIu64 " offset for feature " |
1c0b04d1 | 2225 | "%d, continuing...\n", section->offset, feat); |
37562eac ACM |
2226 | return 0; |
2227 | } | |
2228 | ||
b1e5a9be RR |
2229 | if (feat >= HEADER_LAST_FEATURE) { |
2230 | pr_debug("unknown feature %d, continuing...\n", feat); | |
2231 | return 0; | |
2232 | } | |
2233 | ||
f1c67db7 RR |
2234 | if (!feat_ops[feat].process) |
2235 | return 0; | |
37562eac | 2236 | |
da378962 | 2237 | return feat_ops[feat].process(section, ph, feat, fd, data); |
37562eac | 2238 | } |
2ba08250 | 2239 | |
1c0b04d1 | 2240 | static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, |
454c407e TZ |
2241 | struct perf_header *ph, int fd, |
2242 | bool repipe) | |
7c6a1c65 | 2243 | { |
73323f54 SE |
2244 | int ret; |
2245 | ||
2246 | ret = readn(fd, header, sizeof(*header)); | |
2247 | if (ret <= 0) | |
2248 | return -1; | |
2249 | ||
114382a0 SE |
2250 | if (check_magic_endian(header->magic, header->size, true, ph) < 0) { |
2251 | pr_debug("endian/magic failed\n"); | |
8dc58101 | 2252 | return -1; |
114382a0 SE |
2253 | } |
2254 | ||
2255 | if (ph->needs_swap) | |
2256 | header->size = bswap_64(header->size); | |
8dc58101 | 2257 | |
1c0b04d1 | 2258 | if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0) |
454c407e TZ |
2259 | return -1; |
2260 | ||
8dc58101 TZ |
2261 | return 0; |
2262 | } | |
2263 | ||
2264 | static int perf_header__read_pipe(struct perf_session *session, int fd) | |
2265 | { | |
1c0b04d1 | 2266 | struct perf_header *header = &session->header; |
8dc58101 TZ |
2267 | struct perf_pipe_file_header f_header; |
2268 | ||
1c0b04d1 | 2269 | if (perf_file_header__read_pipe(&f_header, header, fd, |
454c407e | 2270 | session->repipe) < 0) { |
8dc58101 TZ |
2271 | pr_debug("incompatible file format\n"); |
2272 | return -EINVAL; | |
2273 | } | |
2274 | ||
2275 | session->fd = fd; | |
2276 | ||
2277 | return 0; | |
2278 | } | |
2279 | ||
69996df4 SE |
2280 | static int read_attr(int fd, struct perf_header *ph, |
2281 | struct perf_file_attr *f_attr) | |
2282 | { | |
2283 | struct perf_event_attr *attr = &f_attr->attr; | |
2284 | size_t sz, left; | |
2285 | size_t our_sz = sizeof(f_attr->attr); | |
2286 | int ret; | |
2287 | ||
2288 | memset(f_attr, 0, sizeof(*f_attr)); | |
2289 | ||
2290 | /* read minimal guaranteed structure */ | |
2291 | ret = readn(fd, attr, PERF_ATTR_SIZE_VER0); | |
2292 | if (ret <= 0) { | |
2293 | pr_debug("cannot read %d bytes of header attr\n", | |
2294 | PERF_ATTR_SIZE_VER0); | |
2295 | return -1; | |
2296 | } | |
2297 | ||
2298 | /* on file perf_event_attr size */ | |
2299 | sz = attr->size; | |
114382a0 | 2300 | |
69996df4 SE |
2301 | if (ph->needs_swap) |
2302 | sz = bswap_32(sz); | |
2303 | ||
2304 | if (sz == 0) { | |
2305 | /* assume ABI0 */ | |
2306 | sz = PERF_ATTR_SIZE_VER0; | |
2307 | } else if (sz > our_sz) { | |
2308 | pr_debug("file uses a more recent and unsupported ABI" | |
2309 | " (%zu bytes extra)\n", sz - our_sz); | |
2310 | return -1; | |
2311 | } | |
2312 | /* what we have not yet read and that we know about */ | |
2313 | left = sz - PERF_ATTR_SIZE_VER0; | |
2314 | if (left) { | |
2315 | void *ptr = attr; | |
2316 | ptr += PERF_ATTR_SIZE_VER0; | |
2317 | ||
2318 | ret = readn(fd, ptr, left); | |
2319 | } | |
2320 | /* read perf_file_section, ids are read in caller */ | |
2321 | ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids)); | |
2322 | ||
2323 | return ret <= 0 ? -1 : 0; | |
2324 | } | |
2325 | ||
831394bd NK |
2326 | static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel, |
2327 | struct pevent *pevent) | |
cb9dd49e | 2328 | { |
831394bd | 2329 | struct event_format *event; |
cb9dd49e ACM |
2330 | char bf[128]; |
2331 | ||
831394bd NK |
2332 | /* already prepared */ |
2333 | if (evsel->tp_format) | |
2334 | return 0; | |
2335 | ||
2336 | event = pevent_find_event(pevent, evsel->attr.config); | |
cb9dd49e ACM |
2337 | if (event == NULL) |
2338 | return -1; | |
2339 | ||
831394bd NK |
2340 | if (!evsel->name) { |
2341 | snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); | |
2342 | evsel->name = strdup(bf); | |
2343 | if (evsel->name == NULL) | |
2344 | return -1; | |
2345 | } | |
cb9dd49e | 2346 | |
fcf65bf1 | 2347 | evsel->tp_format = event; |
cb9dd49e ACM |
2348 | return 0; |
2349 | } | |
2350 | ||
831394bd NK |
2351 | static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist, |
2352 | struct pevent *pevent) | |
cb9dd49e ACM |
2353 | { |
2354 | struct perf_evsel *pos; | |
2355 | ||
2356 | list_for_each_entry(pos, &evlist->entries, node) { | |
831394bd NK |
2357 | if (pos->attr.type == PERF_TYPE_TRACEPOINT && |
2358 | perf_evsel__prepare_tracepoint_event(pos, pevent)) | |
cb9dd49e ACM |
2359 | return -1; |
2360 | } | |
2361 | ||
2362 | return 0; | |
2363 | } | |
2364 | ||
a91e5431 | 2365 | int perf_session__read_header(struct perf_session *session, int fd) |
8dc58101 | 2366 | { |
1c0b04d1 | 2367 | struct perf_header *header = &session->header; |
ba21594c | 2368 | struct perf_file_header f_header; |
7c6a1c65 PZ |
2369 | struct perf_file_attr f_attr; |
2370 | u64 f_id; | |
7c6a1c65 PZ |
2371 | int nr_attrs, nr_ids, i, j; |
2372 | ||
a91e5431 ACM |
2373 | session->evlist = perf_evlist__new(NULL, NULL); |
2374 | if (session->evlist == NULL) | |
2375 | return -ENOMEM; | |
2376 | ||
8dc58101 TZ |
2377 | if (session->fd_pipe) |
2378 | return perf_header__read_pipe(session, fd); | |
2379 | ||
69996df4 | 2380 | if (perf_file_header__read(&f_header, header, fd) < 0) |
4dc0a04b | 2381 | return -EINVAL; |
7c6a1c65 | 2382 | |
69996df4 | 2383 | nr_attrs = f_header.attrs.size / f_header.attr_size; |
7c6a1c65 PZ |
2384 | lseek(fd, f_header.attrs.offset, SEEK_SET); |
2385 | ||
2386 | for (i = 0; i < nr_attrs; i++) { | |
a91e5431 | 2387 | struct perf_evsel *evsel; |
1c222bce | 2388 | off_t tmp; |
7c6a1c65 | 2389 | |
69996df4 | 2390 | if (read_attr(fd, header, &f_attr) < 0) |
769885f3 | 2391 | goto out_errno; |
ba21594c | 2392 | |
eda3913b DA |
2393 | if (header->needs_swap) |
2394 | perf_event__attr_swap(&f_attr.attr); | |
2395 | ||
1c222bce | 2396 | tmp = lseek(fd, 0, SEEK_CUR); |
a91e5431 | 2397 | evsel = perf_evsel__new(&f_attr.attr, i); |
7c6a1c65 | 2398 | |
a91e5431 ACM |
2399 | if (evsel == NULL) |
2400 | goto out_delete_evlist; | |
2401 | /* | |
2402 | * Do it before so that if perf_evsel__alloc_id fails, this | |
2403 | * entry gets purged too at perf_evlist__delete(). | |
2404 | */ | |
2405 | perf_evlist__add(session->evlist, evsel); | |
7c6a1c65 PZ |
2406 | |
2407 | nr_ids = f_attr.ids.size / sizeof(u64); | |
a91e5431 ACM |
2408 | /* |
2409 | * We don't have the cpu and thread maps on the header, so | |
2410 | * for allocating the perf_sample_id table we fake 1 cpu and | |
2411 | * hattr->ids threads. | |
2412 | */ | |
2413 | if (perf_evsel__alloc_id(evsel, 1, nr_ids)) | |
2414 | goto out_delete_evlist; | |
2415 | ||
7c6a1c65 PZ |
2416 | lseek(fd, f_attr.ids.offset, SEEK_SET); |
2417 | ||
2418 | for (j = 0; j < nr_ids; j++) { | |
1c0b04d1 | 2419 | if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id))) |
769885f3 | 2420 | goto out_errno; |
7c6a1c65 | 2421 | |
a91e5431 | 2422 | perf_evlist__id_add(session->evlist, evsel, 0, j, f_id); |
7c6a1c65 | 2423 | } |
11deb1f9 | 2424 | |
7c6a1c65 PZ |
2425 | lseek(fd, tmp, SEEK_SET); |
2426 | } | |
2427 | ||
d04b35f8 ACM |
2428 | symbol_conf.nr_events = nr_attrs; |
2429 | ||
8755a8f2 AV |
2430 | if (f_header.event_types.size) { |
2431 | lseek(fd, f_header.event_types.offset, SEEK_SET); | |
db146f06 RR |
2432 | trace_events = malloc(f_header.event_types.size); |
2433 | if (trace_events == NULL) | |
4dc0a04b | 2434 | return -ENOMEM; |
db146f06 | 2435 | if (perf_header__getbuffer64(header, fd, trace_events, |
ba21594c | 2436 | f_header.event_types.size)) |
769885f3 | 2437 | goto out_errno; |
db146f06 | 2438 | trace_event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type); |
8755a8f2 | 2439 | } |
03456a15 | 2440 | |
da378962 | 2441 | perf_header__process_sections(header, fd, &session->pevent, |
fbe96f29 | 2442 | perf_file_section__process); |
4778d2e4 | 2443 | |
1c0b04d1 | 2444 | lseek(fd, header->data_offset, SEEK_SET); |
7c6a1c65 | 2445 | |
831394bd NK |
2446 | if (perf_evlist__prepare_tracepoint_events(session->evlist, |
2447 | session->pevent)) | |
cb9dd49e ACM |
2448 | goto out_delete_evlist; |
2449 | ||
1c0b04d1 | 2450 | header->frozen = 1; |
4dc0a04b | 2451 | return 0; |
769885f3 ACM |
2452 | out_errno: |
2453 | return -errno; | |
a91e5431 ACM |
2454 | |
2455 | out_delete_evlist: | |
2456 | perf_evlist__delete(session->evlist); | |
2457 | session->evlist = NULL; | |
2458 | return -ENOMEM; | |
7c6a1c65 | 2459 | } |
0d3a5c88 | 2460 | |
45694aa7 | 2461 | int perf_event__synthesize_attr(struct perf_tool *tool, |
f4d83436 | 2462 | struct perf_event_attr *attr, u32 ids, u64 *id, |
743eb868 | 2463 | perf_event__handler_t process) |
2c46dbb5 | 2464 | { |
8115d60c | 2465 | union perf_event *ev; |
2c46dbb5 TZ |
2466 | size_t size; |
2467 | int err; | |
2468 | ||
2469 | size = sizeof(struct perf_event_attr); | |
9ac3e487 | 2470 | size = PERF_ALIGN(size, sizeof(u64)); |
2c46dbb5 TZ |
2471 | size += sizeof(struct perf_event_header); |
2472 | size += ids * sizeof(u64); | |
2473 | ||
2474 | ev = malloc(size); | |
2475 | ||
ce47dc56 CS |
2476 | if (ev == NULL) |
2477 | return -ENOMEM; | |
2478 | ||
2c46dbb5 TZ |
2479 | ev->attr.attr = *attr; |
2480 | memcpy(ev->attr.id, id, ids * sizeof(u64)); | |
2481 | ||
2482 | ev->attr.header.type = PERF_RECORD_HEADER_ATTR; | |
f4d83436 | 2483 | ev->attr.header.size = (u16)size; |
2c46dbb5 | 2484 | |
f4d83436 RR |
2485 | if (ev->attr.header.size == size) |
2486 | err = process(tool, ev, NULL, NULL); | |
2487 | else | |
2488 | err = -E2BIG; | |
2c46dbb5 TZ |
2489 | |
2490 | free(ev); | |
2491 | ||
2492 | return err; | |
2493 | } | |
2494 | ||
45694aa7 | 2495 | int perf_event__synthesize_attrs(struct perf_tool *tool, |
d20deb64 | 2496 | struct perf_session *session, |
a91e5431 | 2497 | perf_event__handler_t process) |
2c46dbb5 | 2498 | { |
6606f873 | 2499 | struct perf_evsel *evsel; |
a91e5431 | 2500 | int err = 0; |
2c46dbb5 | 2501 | |
6606f873 RR |
2502 | list_for_each_entry(evsel, &session->evlist->entries, node) { |
2503 | err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids, | |
2504 | evsel->id, process); | |
2c46dbb5 TZ |
2505 | if (err) { |
2506 | pr_debug("failed to create perf header attribute\n"); | |
2507 | return err; | |
2508 | } | |
2509 | } | |
2510 | ||
2511 | return err; | |
2512 | } | |
2513 | ||
8115d60c | 2514 | int perf_event__process_attr(union perf_event *event, |
10d0f086 | 2515 | struct perf_evlist **pevlist) |
2c46dbb5 | 2516 | { |
f4d83436 | 2517 | u32 i, ids, n_ids; |
a91e5431 | 2518 | struct perf_evsel *evsel; |
10d0f086 | 2519 | struct perf_evlist *evlist = *pevlist; |
2c46dbb5 | 2520 | |
10d0f086 ACM |
2521 | if (evlist == NULL) { |
2522 | *pevlist = evlist = perf_evlist__new(NULL, NULL); | |
2523 | if (evlist == NULL) | |
a91e5431 ACM |
2524 | return -ENOMEM; |
2525 | } | |
2526 | ||
10d0f086 | 2527 | evsel = perf_evsel__new(&event->attr.attr, evlist->nr_entries); |
a91e5431 | 2528 | if (evsel == NULL) |
2c46dbb5 TZ |
2529 | return -ENOMEM; |
2530 | ||
10d0f086 | 2531 | perf_evlist__add(evlist, evsel); |
a91e5431 | 2532 | |
8115d60c ACM |
2533 | ids = event->header.size; |
2534 | ids -= (void *)&event->attr.id - (void *)event; | |
2c46dbb5 | 2535 | n_ids = ids / sizeof(u64); |
a91e5431 ACM |
2536 | /* |
2537 | * We don't have the cpu and thread maps on the header, so | |
2538 | * for allocating the perf_sample_id table we fake 1 cpu and | |
2539 | * hattr->ids threads. | |
2540 | */ | |
2541 | if (perf_evsel__alloc_id(evsel, 1, n_ids)) | |
2542 | return -ENOMEM; | |
2c46dbb5 TZ |
2543 | |
2544 | for (i = 0; i < n_ids; i++) { | |
10d0f086 | 2545 | perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]); |
2c46dbb5 TZ |
2546 | } |
2547 | ||
2c46dbb5 TZ |
2548 | return 0; |
2549 | } | |
cd19a035 | 2550 | |
45694aa7 | 2551 | int perf_event__synthesize_event_type(struct perf_tool *tool, |
d20deb64 | 2552 | u64 event_id, char *name, |
8115d60c | 2553 | perf_event__handler_t process, |
743eb868 | 2554 | struct machine *machine) |
cd19a035 | 2555 | { |
8115d60c | 2556 | union perf_event ev; |
cd19a035 TZ |
2557 | size_t size = 0; |
2558 | int err = 0; | |
2559 | ||
2560 | memset(&ev, 0, sizeof(ev)); | |
2561 | ||
2562 | ev.event_type.event_type.event_id = event_id; | |
2563 | memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME); | |
2564 | strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1); | |
2565 | ||
2566 | ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE; | |
f8f4b287 | 2567 | size = strlen(ev.event_type.event_type.name); |
9ac3e487 | 2568 | size = PERF_ALIGN(size, sizeof(u64)); |
cd19a035 TZ |
2569 | ev.event_type.header.size = sizeof(ev.event_type) - |
2570 | (sizeof(ev.event_type.event_type.name) - size); | |
2571 | ||
45694aa7 | 2572 | err = process(tool, &ev, NULL, machine); |
cd19a035 TZ |
2573 | |
2574 | return err; | |
2575 | } | |
2576 | ||
45694aa7 | 2577 | int perf_event__synthesize_event_types(struct perf_tool *tool, |
d20deb64 | 2578 | perf_event__handler_t process, |
743eb868 | 2579 | struct machine *machine) |
cd19a035 TZ |
2580 | { |
2581 | struct perf_trace_event_type *type; | |
2582 | int i, err = 0; | |
2583 | ||
db146f06 RR |
2584 | for (i = 0; i < trace_event_count; i++) { |
2585 | type = &trace_events[i]; | |
cd19a035 | 2586 | |
45694aa7 | 2587 | err = perf_event__synthesize_event_type(tool, type->event_id, |
8115d60c | 2588 | type->name, process, |
743eb868 | 2589 | machine); |
cd19a035 TZ |
2590 | if (err) { |
2591 | pr_debug("failed to create perf header event type\n"); | |
2592 | return err; | |
2593 | } | |
2594 | } | |
2595 | ||
2596 | return err; | |
2597 | } | |
2598 | ||
45694aa7 | 2599 | int perf_event__process_event_type(struct perf_tool *tool __unused, |
743eb868 | 2600 | union perf_event *event) |
cd19a035 | 2601 | { |
8115d60c ACM |
2602 | if (perf_header__push_event(event->event_type.event_type.event_id, |
2603 | event->event_type.event_type.name) < 0) | |
cd19a035 TZ |
2604 | return -ENOMEM; |
2605 | ||
2606 | return 0; | |
2607 | } | |
9215545e | 2608 | |
45694aa7 | 2609 | int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, |
d20deb64 | 2610 | struct perf_evlist *evlist, |
743eb868 | 2611 | perf_event__handler_t process) |
9215545e | 2612 | { |
8115d60c | 2613 | union perf_event ev; |
29208e57 | 2614 | struct tracing_data *tdata; |
9215545e | 2615 | ssize_t size = 0, aligned_size = 0, padding; |
fb7d0b3c | 2616 | int err __used = 0; |
9215545e | 2617 | |
29208e57 JO |
2618 | /* |
2619 | * We are going to store the size of the data followed | |
2620 | * by the data contents. Since the fd descriptor is a pipe, | |
2621 | * we cannot seek back to store the size of the data once | |
2622 | * we know it. Instead we: | |
2623 | * | |
2624 | * - write the tracing data to the temp file | |
2625 | * - get/write the data size to pipe | |
2626 | * - write the tracing data from the temp file | |
2627 | * to the pipe | |
2628 | */ | |
2629 | tdata = tracing_data_get(&evlist->entries, fd, true); | |
2630 | if (!tdata) | |
2631 | return -1; | |
2632 | ||
9215545e TZ |
2633 | memset(&ev, 0, sizeof(ev)); |
2634 | ||
2635 | ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA; | |
29208e57 | 2636 | size = tdata->size; |
9ac3e487 | 2637 | aligned_size = PERF_ALIGN(size, sizeof(u64)); |
9215545e TZ |
2638 | padding = aligned_size - size; |
2639 | ev.tracing_data.header.size = sizeof(ev.tracing_data); | |
2640 | ev.tracing_data.size = aligned_size; | |
2641 | ||
45694aa7 | 2642 | process(tool, &ev, NULL, NULL); |
9215545e | 2643 | |
29208e57 JO |
2644 | /* |
2645 | * The put function will copy all the tracing data | |
2646 | * stored in temp file to the pipe. | |
2647 | */ | |
2648 | tracing_data_put(tdata); | |
2649 | ||
9215545e TZ |
2650 | write_padded(fd, NULL, 0, padding); |
2651 | ||
2652 | return aligned_size; | |
2653 | } | |
2654 | ||
8115d60c ACM |
2655 | int perf_event__process_tracing_data(union perf_event *event, |
2656 | struct perf_session *session) | |
9215545e | 2657 | { |
8115d60c | 2658 | ssize_t size_read, padding, size = event->tracing_data.size; |
9215545e TZ |
2659 | off_t offset = lseek(session->fd, 0, SEEK_CUR); |
2660 | char buf[BUFSIZ]; | |
2661 | ||
2662 | /* setup for reading amidst mmap */ | |
2663 | lseek(session->fd, offset + sizeof(struct tracing_data_event), | |
2664 | SEEK_SET); | |
2665 | ||
da378962 ACM |
2666 | size_read = trace_report(session->fd, &session->pevent, |
2667 | session->repipe); | |
9ac3e487 | 2668 | padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read; |
9215545e TZ |
2669 | |
2670 | if (read(session->fd, buf, padding) < 0) | |
2671 | die("reading input file"); | |
454c407e TZ |
2672 | if (session->repipe) { |
2673 | int retw = write(STDOUT_FILENO, buf, padding); | |
2674 | if (retw <= 0 || retw != padding) | |
2675 | die("repiping tracing data padding"); | |
2676 | } | |
9215545e TZ |
2677 | |
2678 | if (size_read + padding != size) | |
2679 | die("tracing data size mismatch"); | |
2680 | ||
831394bd NK |
2681 | perf_evlist__prepare_tracepoint_events(session->evlist, |
2682 | session->pevent); | |
8b6ee4c5 | 2683 | |
9215545e TZ |
2684 | return size_read + padding; |
2685 | } | |
c7929e47 | 2686 | |
45694aa7 | 2687 | int perf_event__synthesize_build_id(struct perf_tool *tool, |
d20deb64 | 2688 | struct dso *pos, u16 misc, |
8115d60c | 2689 | perf_event__handler_t process, |
743eb868 | 2690 | struct machine *machine) |
c7929e47 | 2691 | { |
8115d60c | 2692 | union perf_event ev; |
c7929e47 TZ |
2693 | size_t len; |
2694 | int err = 0; | |
2695 | ||
2696 | if (!pos->hit) | |
2697 | return err; | |
2698 | ||
2699 | memset(&ev, 0, sizeof(ev)); | |
2700 | ||
2701 | len = pos->long_name_len + 1; | |
9ac3e487 | 2702 | len = PERF_ALIGN(len, NAME_ALIGN); |
c7929e47 TZ |
2703 | memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id)); |
2704 | ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID; | |
2705 | ev.build_id.header.misc = misc; | |
23346f21 | 2706 | ev.build_id.pid = machine->pid; |
c7929e47 TZ |
2707 | ev.build_id.header.size = sizeof(ev.build_id) + len; |
2708 | memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len); | |
2709 | ||
45694aa7 | 2710 | err = process(tool, &ev, NULL, machine); |
c7929e47 TZ |
2711 | |
2712 | return err; | |
2713 | } | |
2714 | ||
45694aa7 | 2715 | int perf_event__process_build_id(struct perf_tool *tool __used, |
d20deb64 | 2716 | union perf_event *event, |
8115d60c | 2717 | struct perf_session *session) |
c7929e47 | 2718 | { |
8115d60c ACM |
2719 | __event_process_build_id(&event->build_id, |
2720 | event->build_id.filename, | |
a1645ce1 | 2721 | session); |
c7929e47 TZ |
2722 | return 0; |
2723 | } | |
a1ac1d3c SE |
2724 | |
2725 | void disable_buildid_cache(void) | |
2726 | { | |
2727 | no_buildid_cache = true; | |
2728 | } |