Commit | Line | Data |
---|---|---|
b8f46c5a XG |
1 | #define _FILE_OFFSET_BITS 64 |
2 | ||
7c6a1c65 | 3 | #include <sys/types.h> |
ba21594c | 4 | #include <byteswap.h> |
7c6a1c65 PZ |
5 | #include <unistd.h> |
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
8671dab9 | 8 | #include <linux/list.h> |
ba21594c | 9 | #include <linux/kernel.h> |
7c6a1c65 PZ |
10 | |
11 | #include "util.h" | |
12 | #include "header.h" | |
03456a15 FW |
13 | #include "../perf.h" |
14 | #include "trace-event.h" | |
301a0b02 | 15 | #include "session.h" |
8671dab9 | 16 | #include "symbol.h" |
4778d2e4 | 17 | #include "debug.h" |
7c6a1c65 PZ |
18 | |
19 | /* | |
ec60a3fe | 20 | * Create new perf.data header attribute: |
7c6a1c65 | 21 | */ |
cdd6c482 | 22 | struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr) |
7c6a1c65 PZ |
23 | { |
24 | struct perf_header_attr *self = malloc(sizeof(*self)); | |
25 | ||
dc79c0fc ACM |
26 | if (self != NULL) { |
27 | self->attr = *attr; | |
28 | self->ids = 0; | |
29 | self->size = 1; | |
30 | self->id = malloc(sizeof(u64)); | |
31 | if (self->id == NULL) { | |
32 | free(self); | |
33 | self = NULL; | |
34 | } | |
35 | } | |
7c6a1c65 PZ |
36 | |
37 | return self; | |
38 | } | |
39 | ||
11deb1f9 ACM |
40 | void perf_header_attr__delete(struct perf_header_attr *self) |
41 | { | |
42 | free(self->id); | |
43 | free(self); | |
44 | } | |
45 | ||
58754121 | 46 | int perf_header_attr__add_id(struct perf_header_attr *self, u64 id) |
7c6a1c65 PZ |
47 | { |
48 | int pos = self->ids; | |
49 | ||
50 | self->ids++; | |
51 | if (self->ids > self->size) { | |
58754121 ACM |
52 | int nsize = self->size * 2; |
53 | u64 *nid = realloc(self->id, nsize * sizeof(u64)); | |
54 | ||
55 | if (nid == NULL) | |
56 | return -1; | |
57 | ||
58 | self->size = nsize; | |
59 | self->id = nid; | |
7c6a1c65 PZ |
60 | } |
61 | self->id[pos] = id; | |
58754121 | 62 | return 0; |
7c6a1c65 PZ |
63 | } |
64 | ||
94c744b6 | 65 | int perf_header__init(struct perf_header *self) |
7c6a1c65 | 66 | { |
94c744b6 ACM |
67 | self->size = 1; |
68 | self->attr = malloc(sizeof(void *)); | |
69 | return self->attr == NULL ? -ENOMEM : 0; | |
7c6a1c65 PZ |
70 | } |
71 | ||
94c744b6 | 72 | void perf_header__exit(struct perf_header *self) |
4dc0a04b ACM |
73 | { |
74 | int i; | |
4dc0a04b | 75 | for (i = 0; i < self->attrs; ++i) |
94c744b6 | 76 | perf_header_attr__delete(self->attr[i]); |
4dc0a04b | 77 | free(self->attr); |
4dc0a04b ACM |
78 | } |
79 | ||
11deb1f9 ACM |
80 | int perf_header__add_attr(struct perf_header *self, |
81 | struct perf_header_attr *attr) | |
7c6a1c65 | 82 | { |
7c6a1c65 | 83 | if (self->frozen) |
11deb1f9 | 84 | return -1; |
7c6a1c65 | 85 | |
4dc0a04b | 86 | if (self->attrs == self->size) { |
11deb1f9 ACM |
87 | int nsize = self->size * 2; |
88 | struct perf_header_attr **nattr; | |
89 | ||
90 | nattr = realloc(self->attr, nsize * sizeof(void *)); | |
91 | if (nattr == NULL) | |
92 | return -1; | |
93 | ||
94 | self->size = nsize; | |
95 | self->attr = nattr; | |
7c6a1c65 | 96 | } |
4dc0a04b ACM |
97 | |
98 | self->attr[self->attrs++] = attr; | |
11deb1f9 | 99 | return 0; |
7c6a1c65 PZ |
100 | } |
101 | ||
8755a8f2 AV |
102 | static int event_count; |
103 | static struct perf_trace_event_type *events; | |
104 | ||
ae99fb2c | 105 | int perf_header__push_event(u64 id, const char *name) |
8755a8f2 | 106 | { |
ec60a3fe | 107 | if (strlen(name) > MAX_EVENT_NAME) |
6beba7ad | 108 | pr_warning("Event %s will be truncated\n", name); |
8755a8f2 AV |
109 | |
110 | if (!events) { | |
111 | events = malloc(sizeof(struct perf_trace_event_type)); | |
ae99fb2c ACM |
112 | if (events == NULL) |
113 | return -ENOMEM; | |
8755a8f2 | 114 | } else { |
ae99fb2c ACM |
115 | struct perf_trace_event_type *nevents; |
116 | ||
117 | nevents = realloc(events, (event_count + 1) * sizeof(*events)); | |
118 | if (nevents == NULL) | |
119 | return -ENOMEM; | |
120 | events = nevents; | |
8755a8f2 AV |
121 | } |
122 | memset(&events[event_count], 0, sizeof(struct perf_trace_event_type)); | |
123 | events[event_count].event_id = id; | |
ec60a3fe | 124 | strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1); |
8755a8f2 | 125 | event_count++; |
ae99fb2c | 126 | return 0; |
8755a8f2 AV |
127 | } |
128 | ||
129 | char *perf_header__find_event(u64 id) | |
130 | { | |
131 | int i; | |
132 | for (i = 0 ; i < event_count; i++) { | |
133 | if (events[i].event_id == id) | |
134 | return events[i].name; | |
135 | } | |
136 | return NULL; | |
137 | } | |
138 | ||
7c6a1c65 PZ |
139 | static const char *__perf_magic = "PERFFILE"; |
140 | ||
141 | #define PERF_MAGIC (*(u64 *)__perf_magic) | |
142 | ||
7c6a1c65 | 143 | struct perf_file_attr { |
cdd6c482 | 144 | struct perf_event_attr attr; |
7c6a1c65 PZ |
145 | struct perf_file_section ids; |
146 | }; | |
147 | ||
8d06367f ACM |
148 | void perf_header__set_feat(struct perf_header *self, int feat) |
149 | { | |
150 | set_bit(feat, self->adds_features); | |
151 | } | |
152 | ||
153 | bool perf_header__has_feat(const struct perf_header *self, int feat) | |
154 | { | |
155 | return test_bit(feat, self->adds_features); | |
156 | } | |
157 | ||
3726cc75 | 158 | static int do_write(int fd, const void *buf, size_t size) |
7c6a1c65 PZ |
159 | { |
160 | while (size) { | |
161 | int ret = write(fd, buf, size); | |
162 | ||
163 | if (ret < 0) | |
d5eed904 | 164 | return -errno; |
7c6a1c65 PZ |
165 | |
166 | size -= ret; | |
167 | buf += ret; | |
168 | } | |
3726cc75 ACM |
169 | |
170 | return 0; | |
7c6a1c65 PZ |
171 | } |
172 | ||
f92cb24c ACM |
173 | #define NAME_ALIGN 64 |
174 | ||
175 | static int write_padded(int fd, const void *bf, size_t count, | |
176 | size_t count_aligned) | |
177 | { | |
178 | static const char zero_buf[NAME_ALIGN]; | |
179 | int err = do_write(fd, bf, count); | |
180 | ||
181 | if (!err) | |
182 | err = do_write(fd, zero_buf, count_aligned - count); | |
183 | ||
184 | return err; | |
185 | } | |
186 | ||
4cf40131 ACM |
187 | #define dsos__for_each_with_build_id(pos, head) \ |
188 | list_for_each_entry(pos, head, node) \ | |
189 | if (!pos->has_build_id) \ | |
190 | continue; \ | |
191 | else | |
192 | ||
a89e5abe | 193 | static int __dsos__write_buildid_table(struct list_head *head, u16 misc, int fd) |
8671dab9 | 194 | { |
e30a3d12 ACM |
195 | struct dso *pos; |
196 | ||
4cf40131 | 197 | dsos__for_each_with_build_id(pos, head) { |
d5eed904 | 198 | int err; |
e30a3d12 | 199 | struct build_id_event b; |
6122e4e4 | 200 | size_t len; |
e30a3d12 | 201 | |
6122e4e4 ACM |
202 | if (!pos->hit) |
203 | continue; | |
204 | len = pos->long_name_len + 1; | |
7691b1ec | 205 | len = ALIGN(len, NAME_ALIGN); |
e30a3d12 ACM |
206 | memset(&b, 0, sizeof(b)); |
207 | memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id)); | |
a89e5abe | 208 | b.header.misc = misc; |
e30a3d12 | 209 | b.header.size = sizeof(b) + len; |
d5eed904 ACM |
210 | err = do_write(fd, &b, sizeof(b)); |
211 | if (err < 0) | |
212 | return err; | |
f92cb24c ACM |
213 | err = write_padded(fd, pos->long_name, |
214 | pos->long_name_len + 1, len); | |
d5eed904 ACM |
215 | if (err < 0) |
216 | return err; | |
57f395a7 | 217 | } |
3726cc75 ACM |
218 | |
219 | return 0; | |
8671dab9 FW |
220 | } |
221 | ||
b0da954a ACM |
222 | static int dsos__write_buildid_table(int fd) |
223 | { | |
a89e5abe ACM |
224 | int err = __dsos__write_buildid_table(&dsos__kernel, |
225 | PERF_RECORD_MISC_KERNEL, fd); | |
b0da954a | 226 | if (err == 0) |
a89e5abe ACM |
227 | err = __dsos__write_buildid_table(&dsos__user, |
228 | PERF_RECORD_MISC_USER, fd); | |
b0da954a ACM |
229 | return err; |
230 | } | |
231 | ||
ef12a141 ACM |
232 | int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, |
233 | const char *name, bool is_kallsyms) | |
4cf40131 ACM |
234 | { |
235 | const size_t size = PATH_MAX; | |
236 | char *filename = malloc(size), | |
ef12a141 | 237 | *linkname = malloc(size), *targetname; |
4cf40131 ACM |
238 | int len, err = -1; |
239 | ||
240 | if (filename == NULL || linkname == NULL) | |
241 | goto out_free; | |
242 | ||
9e201442 | 243 | len = snprintf(filename, size, "%s%s%s", |
ef12a141 | 244 | debugdir, is_kallsyms ? "/" : "", name); |
4cf40131 ACM |
245 | if (mkdir_p(filename, 0755)) |
246 | goto out_free; | |
247 | ||
ef12a141 | 248 | snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id); |
4cf40131 | 249 | |
9e201442 ACM |
250 | if (access(filename, F_OK)) { |
251 | if (is_kallsyms) { | |
252 | if (copyfile("/proc/kallsyms", filename)) | |
253 | goto out_free; | |
ef12a141 | 254 | } else if (link(name, filename) && copyfile(name, filename)) |
9e201442 ACM |
255 | goto out_free; |
256 | } | |
4cf40131 ACM |
257 | |
258 | len = snprintf(linkname, size, "%s/.build-id/%.2s", | |
259 | debugdir, sbuild_id); | |
260 | ||
261 | if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) | |
262 | goto out_free; | |
263 | ||
264 | snprintf(linkname + len, size - len, "/%s", sbuild_id + 2); | |
265 | targetname = filename + strlen(debugdir) - 5; | |
266 | memcpy(targetname, "../..", 5); | |
267 | ||
268 | if (symlink(targetname, linkname) == 0) | |
269 | err = 0; | |
270 | out_free: | |
271 | free(filename); | |
272 | free(linkname); | |
273 | return err; | |
274 | } | |
275 | ||
ef12a141 ACM |
276 | static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size, |
277 | const char *name, const char *debugdir, | |
278 | bool is_kallsyms) | |
279 | { | |
280 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
281 | ||
282 | build_id__sprintf(build_id, build_id_size, sbuild_id); | |
283 | ||
284 | return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms); | |
285 | } | |
286 | ||
287 | int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir) | |
288 | { | |
289 | const size_t size = PATH_MAX; | |
290 | char *filename = malloc(size), | |
291 | *linkname = malloc(size); | |
292 | int err = -1; | |
293 | ||
294 | if (filename == NULL || linkname == NULL) | |
295 | goto out_free; | |
296 | ||
297 | snprintf(linkname, size, "%s/.build-id/%.2s/%s", | |
298 | debugdir, sbuild_id, sbuild_id + 2); | |
299 | ||
300 | if (access(linkname, F_OK)) | |
301 | goto out_free; | |
302 | ||
303 | if (readlink(linkname, filename, size) < 0) | |
304 | goto out_free; | |
305 | ||
306 | if (unlink(linkname)) | |
307 | goto out_free; | |
308 | ||
309 | /* | |
310 | * Since the link is relative, we must make it absolute: | |
311 | */ | |
312 | snprintf(linkname, size, "%s/.build-id/%.2s/%s", | |
313 | debugdir, sbuild_id, filename); | |
314 | ||
315 | if (unlink(linkname)) | |
316 | goto out_free; | |
317 | ||
318 | err = 0; | |
319 | out_free: | |
320 | free(filename); | |
321 | free(linkname); | |
322 | return err; | |
323 | } | |
324 | ||
325 | static int dso__cache_build_id(struct dso *self, const char *debugdir) | |
326 | { | |
327 | bool is_kallsyms = self->kernel && self->long_name[0] != '/'; | |
328 | ||
329 | return build_id_cache__add_b(self->build_id, sizeof(self->build_id), | |
330 | self->long_name, debugdir, is_kallsyms); | |
331 | } | |
332 | ||
4cf40131 ACM |
333 | static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir) |
334 | { | |
335 | struct dso *pos; | |
336 | int err = 0; | |
337 | ||
338 | dsos__for_each_with_build_id(pos, head) | |
339 | if (dso__cache_build_id(pos, debugdir)) | |
340 | err = -1; | |
341 | ||
342 | return err; | |
343 | } | |
344 | ||
345 | static int dsos__cache_build_ids(void) | |
346 | { | |
347 | int err_kernel, err_user; | |
348 | char debugdir[PATH_MAX]; | |
349 | ||
350 | snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"), | |
351 | DEBUG_CACHE_DIR); | |
352 | ||
353 | if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) | |
354 | return -1; | |
355 | ||
356 | err_kernel = __dsos__cache_build_ids(&dsos__kernel, debugdir); | |
357 | err_user = __dsos__cache_build_ids(&dsos__user, debugdir); | |
358 | return err_kernel || err_user ? -1 : 0; | |
359 | } | |
360 | ||
d5eed904 | 361 | static int perf_header__adds_write(struct perf_header *self, int fd) |
2ba08250 | 362 | { |
9e827dd0 FW |
363 | int nr_sections; |
364 | struct perf_file_section *feat_sec; | |
365 | int sec_size; | |
366 | u64 sec_start; | |
d5eed904 | 367 | int idx = 0, err; |
9e827dd0 | 368 | |
6122e4e4 | 369 | if (dsos__read_build_ids(true)) |
9e827dd0 FW |
370 | perf_header__set_feat(self, HEADER_BUILD_ID); |
371 | ||
372 | nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); | |
373 | if (!nr_sections) | |
d5eed904 | 374 | return 0; |
9e827dd0 FW |
375 | |
376 | feat_sec = calloc(sizeof(*feat_sec), nr_sections); | |
d5eed904 ACM |
377 | if (feat_sec == NULL) |
378 | return -ENOMEM; | |
9e827dd0 FW |
379 | |
380 | sec_size = sizeof(*feat_sec) * nr_sections; | |
381 | ||
382 | sec_start = self->data_offset + self->data_size; | |
f887f301 | 383 | lseek(fd, sec_start + sec_size, SEEK_SET); |
2ba08250 | 384 | |
3e13ab2d | 385 | if (perf_header__has_feat(self, HEADER_TRACE_INFO)) { |
9e827dd0 FW |
386 | struct perf_file_section *trace_sec; |
387 | ||
388 | trace_sec = &feat_sec[idx++]; | |
389 | ||
2ba08250 | 390 | /* Write trace info */ |
f887f301 | 391 | trace_sec->offset = lseek(fd, 0, SEEK_CUR); |
2ba08250 | 392 | read_tracing_data(fd, attrs, nr_counters); |
f887f301 | 393 | trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset; |
2ba08250 | 394 | } |
8671dab9 | 395 | |
57f395a7 | 396 | |
9e827dd0 FW |
397 | if (perf_header__has_feat(self, HEADER_BUILD_ID)) { |
398 | struct perf_file_section *buildid_sec; | |
399 | ||
400 | buildid_sec = &feat_sec[idx++]; | |
401 | ||
402 | /* Write build-ids */ | |
f887f301 | 403 | buildid_sec->offset = lseek(fd, 0, SEEK_CUR); |
d5eed904 ACM |
404 | err = dsos__write_buildid_table(fd); |
405 | if (err < 0) { | |
406 | pr_debug("failed to write buildid table\n"); | |
407 | goto out_free; | |
408 | } | |
f887f301 XG |
409 | buildid_sec->size = lseek(fd, 0, SEEK_CUR) - |
410 | buildid_sec->offset; | |
4cf40131 | 411 | dsos__cache_build_ids(); |
8671dab9 | 412 | } |
9e827dd0 | 413 | |
f887f301 | 414 | lseek(fd, sec_start, SEEK_SET); |
d5eed904 ACM |
415 | err = do_write(fd, feat_sec, sec_size); |
416 | if (err < 0) | |
417 | pr_debug("failed to write feature section\n"); | |
418 | out_free: | |
9e827dd0 | 419 | free(feat_sec); |
d5eed904 | 420 | return err; |
9e827dd0 | 421 | } |
2ba08250 | 422 | |
8dc58101 TZ |
423 | int perf_header__write_pipe(int fd) |
424 | { | |
425 | struct perf_pipe_file_header f_header; | |
426 | int err; | |
427 | ||
428 | f_header = (struct perf_pipe_file_header){ | |
429 | .magic = PERF_MAGIC, | |
430 | .size = sizeof(f_header), | |
431 | }; | |
432 | ||
433 | err = do_write(fd, &f_header, sizeof(f_header)); | |
434 | if (err < 0) { | |
435 | pr_debug("failed to write perf pipe header\n"); | |
436 | return err; | |
437 | } | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
d5eed904 | 442 | int perf_header__write(struct perf_header *self, int fd, bool at_exit) |
7c6a1c65 PZ |
443 | { |
444 | struct perf_file_header f_header; | |
445 | struct perf_file_attr f_attr; | |
446 | struct perf_header_attr *attr; | |
d5eed904 | 447 | int i, err; |
7c6a1c65 PZ |
448 | |
449 | lseek(fd, sizeof(f_header), SEEK_SET); | |
450 | ||
451 | ||
452 | for (i = 0; i < self->attrs; i++) { | |
453 | attr = self->attr[i]; | |
454 | ||
455 | attr->id_offset = lseek(fd, 0, SEEK_CUR); | |
d5eed904 ACM |
456 | err = do_write(fd, attr->id, attr->ids * sizeof(u64)); |
457 | if (err < 0) { | |
458 | pr_debug("failed to write perf header\n"); | |
459 | return err; | |
460 | } | |
7c6a1c65 PZ |
461 | } |
462 | ||
463 | ||
464 | self->attr_offset = lseek(fd, 0, SEEK_CUR); | |
465 | ||
466 | for (i = 0; i < self->attrs; i++) { | |
467 | attr = self->attr[i]; | |
468 | ||
469 | f_attr = (struct perf_file_attr){ | |
470 | .attr = attr->attr, | |
471 | .ids = { | |
472 | .offset = attr->id_offset, | |
473 | .size = attr->ids * sizeof(u64), | |
474 | } | |
475 | }; | |
d5eed904 ACM |
476 | err = do_write(fd, &f_attr, sizeof(f_attr)); |
477 | if (err < 0) { | |
478 | pr_debug("failed to write perf header attribute\n"); | |
479 | return err; | |
480 | } | |
7c6a1c65 PZ |
481 | } |
482 | ||
8755a8f2 AV |
483 | self->event_offset = lseek(fd, 0, SEEK_CUR); |
484 | self->event_size = event_count * sizeof(struct perf_trace_event_type); | |
d5eed904 ACM |
485 | if (events) { |
486 | err = do_write(fd, events, self->event_size); | |
487 | if (err < 0) { | |
488 | pr_debug("failed to write perf header events\n"); | |
489 | return err; | |
490 | } | |
491 | } | |
8755a8f2 | 492 | |
7c6a1c65 PZ |
493 | self->data_offset = lseek(fd, 0, SEEK_CUR); |
494 | ||
d5eed904 ACM |
495 | if (at_exit) { |
496 | err = perf_header__adds_write(self, fd); | |
497 | if (err < 0) | |
498 | return err; | |
499 | } | |
9e827dd0 | 500 | |
7c6a1c65 PZ |
501 | f_header = (struct perf_file_header){ |
502 | .magic = PERF_MAGIC, | |
503 | .size = sizeof(f_header), | |
504 | .attr_size = sizeof(f_attr), | |
505 | .attrs = { | |
506 | .offset = self->attr_offset, | |
507 | .size = self->attrs * sizeof(f_attr), | |
508 | }, | |
509 | .data = { | |
510 | .offset = self->data_offset, | |
511 | .size = self->data_size, | |
512 | }, | |
8755a8f2 AV |
513 | .event_types = { |
514 | .offset = self->event_offset, | |
515 | .size = self->event_size, | |
516 | }, | |
7c6a1c65 PZ |
517 | }; |
518 | ||
db9f11e3 | 519 | memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features)); |
2ba08250 | 520 | |
7c6a1c65 | 521 | lseek(fd, 0, SEEK_SET); |
d5eed904 ACM |
522 | err = do_write(fd, &f_header, sizeof(f_header)); |
523 | if (err < 0) { | |
524 | pr_debug("failed to write perf header\n"); | |
525 | return err; | |
526 | } | |
f887f301 | 527 | lseek(fd, self->data_offset + self->data_size, SEEK_SET); |
7c6a1c65 PZ |
528 | |
529 | self->frozen = 1; | |
d5eed904 | 530 | return 0; |
7c6a1c65 PZ |
531 | } |
532 | ||
ba21594c ACM |
533 | static int perf_header__getbuffer64(struct perf_header *self, |
534 | int fd, void *buf, size_t size) | |
535 | { | |
8dc58101 | 536 | if (do_read(fd, buf, size) <= 0) |
ba21594c ACM |
537 | return -1; |
538 | ||
539 | if (self->needs_swap) | |
540 | mem_bswap_64(buf, size); | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
37562eac ACM |
545 | int perf_header__process_sections(struct perf_header *self, int fd, |
546 | int (*process)(struct perf_file_section *self, | |
ba21594c | 547 | struct perf_header *ph, |
37562eac | 548 | int feat, int fd)) |
2ba08250 | 549 | { |
9e827dd0 FW |
550 | struct perf_file_section *feat_sec; |
551 | int nr_sections; | |
552 | int sec_size; | |
553 | int idx = 0; | |
769885f3 | 554 | int err = -1, feat = 1; |
9e827dd0 FW |
555 | |
556 | nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); | |
557 | if (!nr_sections) | |
37562eac | 558 | return 0; |
9e827dd0 FW |
559 | |
560 | feat_sec = calloc(sizeof(*feat_sec), nr_sections); | |
561 | if (!feat_sec) | |
37562eac | 562 | return -1; |
9e827dd0 FW |
563 | |
564 | sec_size = sizeof(*feat_sec) * nr_sections; | |
565 | ||
f887f301 | 566 | lseek(fd, self->data_offset + self->data_size, SEEK_SET); |
9e827dd0 | 567 | |
ba21594c | 568 | if (perf_header__getbuffer64(self, fd, feat_sec, sec_size)) |
769885f3 | 569 | goto out_free; |
9e827dd0 | 570 | |
769885f3 | 571 | err = 0; |
37562eac ACM |
572 | while (idx < nr_sections && feat < HEADER_LAST_FEATURE) { |
573 | if (perf_header__has_feat(self, feat)) { | |
574 | struct perf_file_section *sec = &feat_sec[idx++]; | |
2ba08250 | 575 | |
ba21594c | 576 | err = process(sec, self, feat, fd); |
37562eac ACM |
577 | if (err < 0) |
578 | break; | |
579 | } | |
580 | ++feat; | |
2ba08250 | 581 | } |
769885f3 | 582 | out_free: |
37562eac ACM |
583 | free(feat_sec); |
584 | return err; | |
769885f3 | 585 | } |
4778d2e4 | 586 | |
37562eac ACM |
587 | int perf_file_header__read(struct perf_file_header *self, |
588 | struct perf_header *ph, int fd) | |
589 | { | |
590 | lseek(fd, 0, SEEK_SET); | |
37562eac | 591 | |
8dc58101 | 592 | if (do_read(fd, self, sizeof(*self)) <= 0 || |
ba21594c | 593 | memcmp(&self->magic, __perf_magic, sizeof(self->magic))) |
37562eac ACM |
594 | return -1; |
595 | ||
ba21594c ACM |
596 | if (self->attr_size != sizeof(struct perf_file_attr)) { |
597 | u64 attr_size = bswap_64(self->attr_size); | |
598 | ||
599 | if (attr_size != sizeof(struct perf_file_attr)) | |
600 | return -1; | |
601 | ||
602 | mem_bswap_64(self, offsetof(struct perf_file_header, | |
603 | adds_features)); | |
604 | ph->needs_swap = true; | |
605 | } | |
606 | ||
37562eac ACM |
607 | if (self->size != sizeof(*self)) { |
608 | /* Support the previous format */ | |
609 | if (self->size == offsetof(typeof(*self), adds_features)) | |
610 | bitmap_zero(self->adds_features, HEADER_FEAT_BITS); | |
611 | else | |
612 | return -1; | |
4778d2e4 | 613 | } |
9e827dd0 | 614 | |
37562eac | 615 | memcpy(&ph->adds_features, &self->adds_features, |
ba21594c ACM |
616 | sizeof(ph->adds_features)); |
617 | /* | |
618 | * FIXME: hack that assumes that if we need swap the perf.data file | |
619 | * may be coming from an arch with a different word-size, ergo different | |
620 | * DEFINE_BITMAP format, investigate more later, but for now its mostly | |
621 | * safe to assume that we have a build-id section. Trace files probably | |
622 | * have several other issues in this realm anyway... | |
623 | */ | |
624 | if (ph->needs_swap) { | |
625 | memset(&ph->adds_features, 0, sizeof(ph->adds_features)); | |
626 | perf_header__set_feat(ph, HEADER_BUILD_ID); | |
627 | } | |
37562eac ACM |
628 | |
629 | ph->event_offset = self->event_types.offset; | |
ba21594c ACM |
630 | ph->event_size = self->event_types.size; |
631 | ph->data_offset = self->data.offset; | |
37562eac ACM |
632 | ph->data_size = self->data.size; |
633 | return 0; | |
634 | } | |
635 | ||
636 | static int perf_file_section__process(struct perf_file_section *self, | |
ba21594c | 637 | struct perf_header *ph, |
37562eac ACM |
638 | int feat, int fd) |
639 | { | |
f887f301 | 640 | if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) { |
37562eac ACM |
641 | pr_debug("Failed to lseek to %Ld offset for feature %d, " |
642 | "continuing...\n", self->offset, feat); | |
643 | return 0; | |
644 | } | |
645 | ||
646 | switch (feat) { | |
647 | case HEADER_TRACE_INFO: | |
648 | trace_report(fd); | |
649 | break; | |
650 | ||
651 | case HEADER_BUILD_ID: | |
ba21594c | 652 | if (perf_header__read_build_ids(ph, fd, self->offset, self->size)) |
37562eac ACM |
653 | pr_debug("Failed to read buildids, continuing...\n"); |
654 | break; | |
655 | default: | |
656 | pr_debug("unknown feature %d, continuing...\n", feat); | |
657 | } | |
658 | ||
659 | return 0; | |
660 | } | |
2ba08250 | 661 | |
8dc58101 TZ |
662 | static int perf_file_header__read_pipe(struct perf_pipe_file_header *self, |
663 | struct perf_header *ph, int fd) | |
7c6a1c65 | 664 | { |
8dc58101 TZ |
665 | if (do_read(fd, self, sizeof(*self)) <= 0 || |
666 | memcmp(&self->magic, __perf_magic, sizeof(self->magic))) | |
667 | return -1; | |
668 | ||
669 | if (self->size != sizeof(*self)) { | |
670 | u64 size = bswap_64(self->size); | |
671 | ||
672 | if (size != sizeof(*self)) | |
673 | return -1; | |
674 | ||
675 | ph->needs_swap = true; | |
676 | } | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static int perf_header__read_pipe(struct perf_session *session, int fd) | |
682 | { | |
683 | struct perf_header *self = &session->header; | |
684 | struct perf_pipe_file_header f_header; | |
685 | ||
686 | if (perf_file_header__read_pipe(&f_header, self, fd) < 0) { | |
687 | pr_debug("incompatible file format\n"); | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
691 | session->fd = fd; | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | int perf_header__read(struct perf_session *session, int fd) | |
697 | { | |
698 | struct perf_header *self = &session->header; | |
ba21594c | 699 | struct perf_file_header f_header; |
7c6a1c65 PZ |
700 | struct perf_file_attr f_attr; |
701 | u64 f_id; | |
7c6a1c65 PZ |
702 | int nr_attrs, nr_ids, i, j; |
703 | ||
8dc58101 TZ |
704 | if (session->fd_pipe) |
705 | return perf_header__read_pipe(session, fd); | |
706 | ||
4dc0a04b ACM |
707 | if (perf_file_header__read(&f_header, self, fd) < 0) { |
708 | pr_debug("incompatible file format\n"); | |
709 | return -EINVAL; | |
710 | } | |
7c6a1c65 PZ |
711 | |
712 | nr_attrs = f_header.attrs.size / sizeof(f_attr); | |
713 | lseek(fd, f_header.attrs.offset, SEEK_SET); | |
714 | ||
715 | for (i = 0; i < nr_attrs; i++) { | |
716 | struct perf_header_attr *attr; | |
1c222bce | 717 | off_t tmp; |
7c6a1c65 | 718 | |
ba21594c | 719 | if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr))) |
769885f3 | 720 | goto out_errno; |
ba21594c | 721 | |
1c222bce | 722 | tmp = lseek(fd, 0, SEEK_CUR); |
7c6a1c65 PZ |
723 | |
724 | attr = perf_header_attr__new(&f_attr.attr); | |
dc79c0fc | 725 | if (attr == NULL) |
4dc0a04b | 726 | return -ENOMEM; |
7c6a1c65 PZ |
727 | |
728 | nr_ids = f_attr.ids.size / sizeof(u64); | |
729 | lseek(fd, f_attr.ids.offset, SEEK_SET); | |
730 | ||
731 | for (j = 0; j < nr_ids; j++) { | |
ba21594c | 732 | if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id))) |
769885f3 | 733 | goto out_errno; |
7c6a1c65 | 734 | |
4dc0a04b ACM |
735 | if (perf_header_attr__add_id(attr, f_id) < 0) { |
736 | perf_header_attr__delete(attr); | |
737 | return -ENOMEM; | |
738 | } | |
739 | } | |
740 | if (perf_header__add_attr(self, attr) < 0) { | |
741 | perf_header_attr__delete(attr); | |
742 | return -ENOMEM; | |
7c6a1c65 | 743 | } |
11deb1f9 | 744 | |
7c6a1c65 PZ |
745 | lseek(fd, tmp, SEEK_SET); |
746 | } | |
747 | ||
8755a8f2 AV |
748 | if (f_header.event_types.size) { |
749 | lseek(fd, f_header.event_types.offset, SEEK_SET); | |
750 | events = malloc(f_header.event_types.size); | |
4dc0a04b ACM |
751 | if (events == NULL) |
752 | return -ENOMEM; | |
ba21594c ACM |
753 | if (perf_header__getbuffer64(self, fd, events, |
754 | f_header.event_types.size)) | |
769885f3 | 755 | goto out_errno; |
8755a8f2 AV |
756 | event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type); |
757 | } | |
03456a15 | 758 | |
37562eac | 759 | perf_header__process_sections(self, fd, perf_file_section__process); |
4778d2e4 | 760 | |
2e01d179 | 761 | lseek(fd, self->data_offset, SEEK_SET); |
7c6a1c65 PZ |
762 | |
763 | self->frozen = 1; | |
4dc0a04b | 764 | return 0; |
769885f3 ACM |
765 | out_errno: |
766 | return -errno; | |
7c6a1c65 | 767 | } |
0d3a5c88 FW |
768 | |
769 | u64 perf_header__sample_type(struct perf_header *header) | |
770 | { | |
771 | u64 type = 0; | |
772 | int i; | |
773 | ||
774 | for (i = 0; i < header->attrs; i++) { | |
775 | struct perf_header_attr *attr = header->attr[i]; | |
776 | ||
777 | if (!type) | |
778 | type = attr->attr.sample_type; | |
779 | else if (type != attr->attr.sample_type) | |
780 | die("non matching sample_type"); | |
781 | } | |
782 | ||
783 | return type; | |
784 | } | |
785 | ||
cdd6c482 | 786 | struct perf_event_attr * |
0d3a5c88 FW |
787 | perf_header__find_attr(u64 id, struct perf_header *header) |
788 | { | |
789 | int i; | |
790 | ||
791 | for (i = 0; i < header->attrs; i++) { | |
792 | struct perf_header_attr *attr = header->attr[i]; | |
793 | int j; | |
794 | ||
795 | for (j = 0; j < attr->ids; j++) { | |
796 | if (attr->id[j] == id) | |
797 | return &attr->attr; | |
798 | } | |
799 | } | |
800 | ||
801 | return NULL; | |
802 | } | |
2c46dbb5 TZ |
803 | |
804 | int event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id, | |
805 | event__handler_t process, | |
806 | struct perf_session *session) | |
807 | { | |
808 | event_t *ev; | |
809 | size_t size; | |
810 | int err; | |
811 | ||
812 | size = sizeof(struct perf_event_attr); | |
813 | size = ALIGN(size, sizeof(u64)); | |
814 | size += sizeof(struct perf_event_header); | |
815 | size += ids * sizeof(u64); | |
816 | ||
817 | ev = malloc(size); | |
818 | ||
819 | ev->attr.attr = *attr; | |
820 | memcpy(ev->attr.id, id, ids * sizeof(u64)); | |
821 | ||
822 | ev->attr.header.type = PERF_RECORD_HEADER_ATTR; | |
823 | ev->attr.header.size = size; | |
824 | ||
825 | err = process(ev, session); | |
826 | ||
827 | free(ev); | |
828 | ||
829 | return err; | |
830 | } | |
831 | ||
832 | int event__synthesize_attrs(struct perf_header *self, | |
833 | event__handler_t process, | |
834 | struct perf_session *session) | |
835 | { | |
836 | struct perf_header_attr *attr; | |
837 | int i, err = 0; | |
838 | ||
839 | for (i = 0; i < self->attrs; i++) { | |
840 | attr = self->attr[i]; | |
841 | ||
842 | err = event__synthesize_attr(&attr->attr, attr->ids, attr->id, | |
843 | process, session); | |
844 | if (err) { | |
845 | pr_debug("failed to create perf header attribute\n"); | |
846 | return err; | |
847 | } | |
848 | } | |
849 | ||
850 | return err; | |
851 | } | |
852 | ||
853 | int event__process_attr(event_t *self, struct perf_session *session) | |
854 | { | |
855 | struct perf_header_attr *attr; | |
856 | unsigned int i, ids, n_ids; | |
857 | ||
858 | attr = perf_header_attr__new(&self->attr.attr); | |
859 | if (attr == NULL) | |
860 | return -ENOMEM; | |
861 | ||
862 | ids = self->header.size; | |
863 | ids -= (void *)&self->attr.id - (void *)self; | |
864 | n_ids = ids / sizeof(u64); | |
865 | ||
866 | for (i = 0; i < n_ids; i++) { | |
867 | if (perf_header_attr__add_id(attr, self->attr.id[i]) < 0) { | |
868 | perf_header_attr__delete(attr); | |
869 | return -ENOMEM; | |
870 | } | |
871 | } | |
872 | ||
873 | if (perf_header__add_attr(&session->header, attr) < 0) { | |
874 | perf_header_attr__delete(attr); | |
875 | return -ENOMEM; | |
876 | } | |
877 | ||
878 | perf_session__update_sample_type(session); | |
879 | ||
880 | return 0; | |
881 | } | |
cd19a035 TZ |
882 | |
883 | int event__synthesize_event_type(u64 event_id, char *name, | |
884 | event__handler_t process, | |
885 | struct perf_session *session) | |
886 | { | |
887 | event_t ev; | |
888 | size_t size = 0; | |
889 | int err = 0; | |
890 | ||
891 | memset(&ev, 0, sizeof(ev)); | |
892 | ||
893 | ev.event_type.event_type.event_id = event_id; | |
894 | memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME); | |
895 | strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1); | |
896 | ||
897 | ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE; | |
898 | size = strlen(name); | |
899 | size = ALIGN(size, sizeof(u64)); | |
900 | ev.event_type.header.size = sizeof(ev.event_type) - | |
901 | (sizeof(ev.event_type.event_type.name) - size); | |
902 | ||
903 | err = process(&ev, session); | |
904 | ||
905 | return err; | |
906 | } | |
907 | ||
908 | int event__synthesize_event_types(event__handler_t process, | |
909 | struct perf_session *session) | |
910 | { | |
911 | struct perf_trace_event_type *type; | |
912 | int i, err = 0; | |
913 | ||
914 | for (i = 0; i < event_count; i++) { | |
915 | type = &events[i]; | |
916 | ||
917 | err = event__synthesize_event_type(type->event_id, type->name, | |
918 | process, session); | |
919 | if (err) { | |
920 | pr_debug("failed to create perf header event type\n"); | |
921 | return err; | |
922 | } | |
923 | } | |
924 | ||
925 | return err; | |
926 | } | |
927 | ||
928 | int event__process_event_type(event_t *self, | |
929 | struct perf_session *session __unused) | |
930 | { | |
931 | if (perf_header__push_event(self->event_type.event_type.event_id, | |
932 | self->event_type.event_type.name) < 0) | |
933 | return -ENOMEM; | |
934 | ||
935 | return 0; | |
936 | } |