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