Commit | Line | Data |
---|---|---|
7c6a1c65 | 1 | #include <sys/types.h> |
ba21594c | 2 | #include <byteswap.h> |
7c6a1c65 PZ |
3 | #include <unistd.h> |
4 | #include <stdio.h> | |
5 | #include <stdlib.h> | |
8671dab9 | 6 | #include <linux/list.h> |
ba21594c | 7 | #include <linux/kernel.h> |
7c6a1c65 PZ |
8 | |
9 | #include "util.h" | |
10 | #include "header.h" | |
03456a15 FW |
11 | #include "../perf.h" |
12 | #include "trace-event.h" | |
301a0b02 | 13 | #include "session.h" |
8671dab9 | 14 | #include "symbol.h" |
4778d2e4 | 15 | #include "debug.h" |
7c6a1c65 PZ |
16 | |
17 | /* | |
ec60a3fe | 18 | * Create new perf.data header attribute: |
7c6a1c65 | 19 | */ |
cdd6c482 | 20 | struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr) |
7c6a1c65 PZ |
21 | { |
22 | struct perf_header_attr *self = malloc(sizeof(*self)); | |
23 | ||
dc79c0fc ACM |
24 | if (self != NULL) { |
25 | self->attr = *attr; | |
26 | self->ids = 0; | |
27 | self->size = 1; | |
28 | self->id = malloc(sizeof(u64)); | |
29 | if (self->id == NULL) { | |
30 | free(self); | |
31 | self = NULL; | |
32 | } | |
33 | } | |
7c6a1c65 PZ |
34 | |
35 | return self; | |
36 | } | |
37 | ||
11deb1f9 ACM |
38 | void perf_header_attr__delete(struct perf_header_attr *self) |
39 | { | |
40 | free(self->id); | |
41 | free(self); | |
42 | } | |
43 | ||
58754121 | 44 | int perf_header_attr__add_id(struct perf_header_attr *self, u64 id) |
7c6a1c65 PZ |
45 | { |
46 | int pos = self->ids; | |
47 | ||
48 | self->ids++; | |
49 | if (self->ids > self->size) { | |
58754121 ACM |
50 | int nsize = self->size * 2; |
51 | u64 *nid = realloc(self->id, nsize * sizeof(u64)); | |
52 | ||
53 | if (nid == NULL) | |
54 | return -1; | |
55 | ||
56 | self->size = nsize; | |
57 | self->id = nid; | |
7c6a1c65 PZ |
58 | } |
59 | self->id[pos] = id; | |
58754121 | 60 | return 0; |
7c6a1c65 PZ |
61 | } |
62 | ||
94c744b6 | 63 | int perf_header__init(struct perf_header *self) |
7c6a1c65 | 64 | { |
94c744b6 ACM |
65 | self->size = 1; |
66 | self->attr = malloc(sizeof(void *)); | |
67 | return self->attr == NULL ? -ENOMEM : 0; | |
7c6a1c65 PZ |
68 | } |
69 | ||
94c744b6 | 70 | void perf_header__exit(struct perf_header *self) |
4dc0a04b ACM |
71 | { |
72 | int i; | |
4dc0a04b | 73 | for (i = 0; i < self->attrs; ++i) |
94c744b6 | 74 | perf_header_attr__delete(self->attr[i]); |
4dc0a04b | 75 | free(self->attr); |
4dc0a04b ACM |
76 | } |
77 | ||
11deb1f9 ACM |
78 | int perf_header__add_attr(struct perf_header *self, |
79 | struct perf_header_attr *attr) | |
7c6a1c65 | 80 | { |
7c6a1c65 | 81 | if (self->frozen) |
11deb1f9 | 82 | return -1; |
7c6a1c65 | 83 | |
4dc0a04b | 84 | if (self->attrs == self->size) { |
11deb1f9 ACM |
85 | int nsize = self->size * 2; |
86 | struct perf_header_attr **nattr; | |
87 | ||
88 | nattr = realloc(self->attr, nsize * sizeof(void *)); | |
89 | if (nattr == NULL) | |
90 | return -1; | |
91 | ||
92 | self->size = nsize; | |
93 | self->attr = nattr; | |
7c6a1c65 | 94 | } |
4dc0a04b ACM |
95 | |
96 | self->attr[self->attrs++] = attr; | |
11deb1f9 | 97 | return 0; |
7c6a1c65 PZ |
98 | } |
99 | ||
ec60a3fe AV |
100 | #define MAX_EVENT_NAME 64 |
101 | ||
8755a8f2 AV |
102 | struct perf_trace_event_type { |
103 | u64 event_id; | |
ec60a3fe | 104 | char name[MAX_EVENT_NAME]; |
8755a8f2 AV |
105 | }; |
106 | ||
107 | static int event_count; | |
108 | static struct perf_trace_event_type *events; | |
109 | ||
ae99fb2c | 110 | int perf_header__push_event(u64 id, const char *name) |
8755a8f2 | 111 | { |
ec60a3fe | 112 | if (strlen(name) > MAX_EVENT_NAME) |
6beba7ad | 113 | pr_warning("Event %s will be truncated\n", name); |
8755a8f2 AV |
114 | |
115 | if (!events) { | |
116 | events = malloc(sizeof(struct perf_trace_event_type)); | |
ae99fb2c ACM |
117 | if (events == NULL) |
118 | return -ENOMEM; | |
8755a8f2 | 119 | } else { |
ae99fb2c ACM |
120 | struct perf_trace_event_type *nevents; |
121 | ||
122 | nevents = realloc(events, (event_count + 1) * sizeof(*events)); | |
123 | if (nevents == NULL) | |
124 | return -ENOMEM; | |
125 | events = nevents; | |
8755a8f2 AV |
126 | } |
127 | memset(&events[event_count], 0, sizeof(struct perf_trace_event_type)); | |
128 | events[event_count].event_id = id; | |
ec60a3fe | 129 | strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1); |
8755a8f2 | 130 | event_count++; |
ae99fb2c | 131 | return 0; |
8755a8f2 AV |
132 | } |
133 | ||
134 | char *perf_header__find_event(u64 id) | |
135 | { | |
136 | int i; | |
137 | for (i = 0 ; i < event_count; i++) { | |
138 | if (events[i].event_id == id) | |
139 | return events[i].name; | |
140 | } | |
141 | return NULL; | |
142 | } | |
143 | ||
7c6a1c65 PZ |
144 | static const char *__perf_magic = "PERFFILE"; |
145 | ||
146 | #define PERF_MAGIC (*(u64 *)__perf_magic) | |
147 | ||
7c6a1c65 | 148 | struct perf_file_attr { |
cdd6c482 | 149 | struct perf_event_attr attr; |
7c6a1c65 PZ |
150 | struct perf_file_section ids; |
151 | }; | |
152 | ||
8d06367f ACM |
153 | void perf_header__set_feat(struct perf_header *self, int feat) |
154 | { | |
155 | set_bit(feat, self->adds_features); | |
156 | } | |
157 | ||
158 | bool perf_header__has_feat(const struct perf_header *self, int feat) | |
159 | { | |
160 | return test_bit(feat, self->adds_features); | |
161 | } | |
162 | ||
3726cc75 | 163 | static int do_write(int fd, const void *buf, size_t size) |
7c6a1c65 PZ |
164 | { |
165 | while (size) { | |
166 | int ret = write(fd, buf, size); | |
167 | ||
168 | if (ret < 0) | |
d5eed904 | 169 | return -errno; |
7c6a1c65 PZ |
170 | |
171 | size -= ret; | |
172 | buf += ret; | |
173 | } | |
3726cc75 ACM |
174 | |
175 | return 0; | |
7c6a1c65 PZ |
176 | } |
177 | ||
f92cb24c ACM |
178 | #define NAME_ALIGN 64 |
179 | ||
180 | static int write_padded(int fd, const void *bf, size_t count, | |
181 | size_t count_aligned) | |
182 | { | |
183 | static const char zero_buf[NAME_ALIGN]; | |
184 | int err = do_write(fd, bf, count); | |
185 | ||
186 | if (!err) | |
187 | err = do_write(fd, zero_buf, count_aligned - count); | |
188 | ||
189 | return err; | |
190 | } | |
191 | ||
4cf40131 ACM |
192 | #define dsos__for_each_with_build_id(pos, head) \ |
193 | list_for_each_entry(pos, head, node) \ | |
194 | if (!pos->has_build_id) \ | |
195 | continue; \ | |
196 | else | |
197 | ||
a89e5abe | 198 | static int __dsos__write_buildid_table(struct list_head *head, u16 misc, int fd) |
8671dab9 | 199 | { |
e30a3d12 ACM |
200 | struct dso *pos; |
201 | ||
4cf40131 | 202 | dsos__for_each_with_build_id(pos, head) { |
d5eed904 | 203 | int err; |
e30a3d12 | 204 | struct build_id_event b; |
4cf40131 | 205 | size_t len = pos->long_name_len + 1; |
e30a3d12 | 206 | |
7691b1ec | 207 | len = ALIGN(len, NAME_ALIGN); |
e30a3d12 ACM |
208 | memset(&b, 0, sizeof(b)); |
209 | memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id)); | |
a89e5abe | 210 | b.header.misc = misc; |
e30a3d12 | 211 | b.header.size = sizeof(b) + len; |
d5eed904 ACM |
212 | err = do_write(fd, &b, sizeof(b)); |
213 | if (err < 0) | |
214 | return err; | |
f92cb24c ACM |
215 | err = write_padded(fd, pos->long_name, |
216 | pos->long_name_len + 1, len); | |
d5eed904 ACM |
217 | if (err < 0) |
218 | return err; | |
57f395a7 | 219 | } |
3726cc75 ACM |
220 | |
221 | return 0; | |
8671dab9 FW |
222 | } |
223 | ||
b0da954a ACM |
224 | static int dsos__write_buildid_table(int fd) |
225 | { | |
a89e5abe ACM |
226 | int err = __dsos__write_buildid_table(&dsos__kernel, |
227 | PERF_RECORD_MISC_KERNEL, fd); | |
b0da954a | 228 | if (err == 0) |
a89e5abe ACM |
229 | err = __dsos__write_buildid_table(&dsos__user, |
230 | PERF_RECORD_MISC_USER, fd); | |
b0da954a ACM |
231 | return err; |
232 | } | |
233 | ||
4cf40131 ACM |
234 | static int dso__cache_build_id(struct dso *self, const char *debugdir) |
235 | { | |
236 | const size_t size = PATH_MAX; | |
237 | char *filename = malloc(size), | |
238 | *linkname = malloc(size), *targetname, *sbuild_id; | |
239 | int len, err = -1; | |
240 | ||
241 | if (filename == NULL || linkname == NULL) | |
242 | goto out_free; | |
243 | ||
244 | len = snprintf(filename, size, "%s%s", debugdir, self->long_name); | |
245 | if (mkdir_p(filename, 0755)) | |
246 | goto out_free; | |
247 | ||
248 | len += snprintf(filename + len, sizeof(filename) - len, "/"); | |
249 | sbuild_id = filename + len; | |
250 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
251 | ||
252 | if (access(filename, F_OK) && link(self->long_name, filename) && | |
253 | copyfile(self->long_name, filename)) | |
254 | goto out_free; | |
255 | ||
256 | len = snprintf(linkname, size, "%s/.build-id/%.2s", | |
257 | debugdir, sbuild_id); | |
258 | ||
259 | if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) | |
260 | goto out_free; | |
261 | ||
262 | snprintf(linkname + len, size - len, "/%s", sbuild_id + 2); | |
263 | targetname = filename + strlen(debugdir) - 5; | |
264 | memcpy(targetname, "../..", 5); | |
265 | ||
266 | if (symlink(targetname, linkname) == 0) | |
267 | err = 0; | |
268 | out_free: | |
269 | free(filename); | |
270 | free(linkname); | |
271 | return err; | |
272 | } | |
273 | ||
274 | static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir) | |
275 | { | |
276 | struct dso *pos; | |
277 | int err = 0; | |
278 | ||
279 | dsos__for_each_with_build_id(pos, head) | |
280 | if (dso__cache_build_id(pos, debugdir)) | |
281 | err = -1; | |
282 | ||
283 | return err; | |
284 | } | |
285 | ||
286 | static int dsos__cache_build_ids(void) | |
287 | { | |
288 | int err_kernel, err_user; | |
289 | char debugdir[PATH_MAX]; | |
290 | ||
291 | snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"), | |
292 | DEBUG_CACHE_DIR); | |
293 | ||
294 | if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) | |
295 | return -1; | |
296 | ||
297 | err_kernel = __dsos__cache_build_ids(&dsos__kernel, debugdir); | |
298 | err_user = __dsos__cache_build_ids(&dsos__user, debugdir); | |
299 | return err_kernel || err_user ? -1 : 0; | |
300 | } | |
301 | ||
d5eed904 | 302 | static int perf_header__adds_write(struct perf_header *self, int fd) |
2ba08250 | 303 | { |
9e827dd0 FW |
304 | int nr_sections; |
305 | struct perf_file_section *feat_sec; | |
306 | int sec_size; | |
307 | u64 sec_start; | |
d5eed904 | 308 | int idx = 0, err; |
9e827dd0 | 309 | |
e30a3d12 | 310 | if (dsos__read_build_ids()) |
9e827dd0 FW |
311 | perf_header__set_feat(self, HEADER_BUILD_ID); |
312 | ||
313 | nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); | |
314 | if (!nr_sections) | |
d5eed904 | 315 | return 0; |
9e827dd0 FW |
316 | |
317 | feat_sec = calloc(sizeof(*feat_sec), nr_sections); | |
d5eed904 ACM |
318 | if (feat_sec == NULL) |
319 | return -ENOMEM; | |
9e827dd0 FW |
320 | |
321 | sec_size = sizeof(*feat_sec) * nr_sections; | |
322 | ||
323 | sec_start = self->data_offset + self->data_size; | |
324 | lseek(fd, sec_start + sec_size, SEEK_SET); | |
2ba08250 | 325 | |
3e13ab2d | 326 | if (perf_header__has_feat(self, HEADER_TRACE_INFO)) { |
9e827dd0 FW |
327 | struct perf_file_section *trace_sec; |
328 | ||
329 | trace_sec = &feat_sec[idx++]; | |
330 | ||
2ba08250 | 331 | /* Write trace info */ |
9e827dd0 | 332 | trace_sec->offset = lseek(fd, 0, SEEK_CUR); |
2ba08250 | 333 | read_tracing_data(fd, attrs, nr_counters); |
9e827dd0 | 334 | trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset; |
2ba08250 | 335 | } |
8671dab9 | 336 | |
57f395a7 | 337 | |
9e827dd0 FW |
338 | if (perf_header__has_feat(self, HEADER_BUILD_ID)) { |
339 | struct perf_file_section *buildid_sec; | |
340 | ||
341 | buildid_sec = &feat_sec[idx++]; | |
342 | ||
343 | /* Write build-ids */ | |
344 | buildid_sec->offset = lseek(fd, 0, SEEK_CUR); | |
d5eed904 ACM |
345 | err = dsos__write_buildid_table(fd); |
346 | if (err < 0) { | |
347 | pr_debug("failed to write buildid table\n"); | |
348 | goto out_free; | |
349 | } | |
9e827dd0 | 350 | buildid_sec->size = lseek(fd, 0, SEEK_CUR) - buildid_sec->offset; |
4cf40131 | 351 | dsos__cache_build_ids(); |
8671dab9 | 352 | } |
9e827dd0 FW |
353 | |
354 | lseek(fd, sec_start, SEEK_SET); | |
d5eed904 ACM |
355 | err = do_write(fd, feat_sec, sec_size); |
356 | if (err < 0) | |
357 | pr_debug("failed to write feature section\n"); | |
358 | out_free: | |
9e827dd0 | 359 | free(feat_sec); |
d5eed904 | 360 | return err; |
9e827dd0 | 361 | } |
2ba08250 | 362 | |
d5eed904 | 363 | int perf_header__write(struct perf_header *self, int fd, bool at_exit) |
7c6a1c65 PZ |
364 | { |
365 | struct perf_file_header f_header; | |
366 | struct perf_file_attr f_attr; | |
367 | struct perf_header_attr *attr; | |
d5eed904 | 368 | int i, err; |
7c6a1c65 PZ |
369 | |
370 | lseek(fd, sizeof(f_header), SEEK_SET); | |
371 | ||
372 | ||
373 | for (i = 0; i < self->attrs; i++) { | |
374 | attr = self->attr[i]; | |
375 | ||
376 | attr->id_offset = lseek(fd, 0, SEEK_CUR); | |
d5eed904 ACM |
377 | err = do_write(fd, attr->id, attr->ids * sizeof(u64)); |
378 | if (err < 0) { | |
379 | pr_debug("failed to write perf header\n"); | |
380 | return err; | |
381 | } | |
7c6a1c65 PZ |
382 | } |
383 | ||
384 | ||
385 | self->attr_offset = lseek(fd, 0, SEEK_CUR); | |
386 | ||
387 | for (i = 0; i < self->attrs; i++) { | |
388 | attr = self->attr[i]; | |
389 | ||
390 | f_attr = (struct perf_file_attr){ | |
391 | .attr = attr->attr, | |
392 | .ids = { | |
393 | .offset = attr->id_offset, | |
394 | .size = attr->ids * sizeof(u64), | |
395 | } | |
396 | }; | |
d5eed904 ACM |
397 | err = do_write(fd, &f_attr, sizeof(f_attr)); |
398 | if (err < 0) { | |
399 | pr_debug("failed to write perf header attribute\n"); | |
400 | return err; | |
401 | } | |
7c6a1c65 PZ |
402 | } |
403 | ||
8755a8f2 AV |
404 | self->event_offset = lseek(fd, 0, SEEK_CUR); |
405 | self->event_size = event_count * sizeof(struct perf_trace_event_type); | |
d5eed904 ACM |
406 | if (events) { |
407 | err = do_write(fd, events, self->event_size); | |
408 | if (err < 0) { | |
409 | pr_debug("failed to write perf header events\n"); | |
410 | return err; | |
411 | } | |
412 | } | |
8755a8f2 | 413 | |
7c6a1c65 PZ |
414 | self->data_offset = lseek(fd, 0, SEEK_CUR); |
415 | ||
d5eed904 ACM |
416 | if (at_exit) { |
417 | err = perf_header__adds_write(self, fd); | |
418 | if (err < 0) | |
419 | return err; | |
420 | } | |
9e827dd0 | 421 | |
7c6a1c65 PZ |
422 | f_header = (struct perf_file_header){ |
423 | .magic = PERF_MAGIC, | |
424 | .size = sizeof(f_header), | |
425 | .attr_size = sizeof(f_attr), | |
426 | .attrs = { | |
427 | .offset = self->attr_offset, | |
428 | .size = self->attrs * sizeof(f_attr), | |
429 | }, | |
430 | .data = { | |
431 | .offset = self->data_offset, | |
432 | .size = self->data_size, | |
433 | }, | |
8755a8f2 AV |
434 | .event_types = { |
435 | .offset = self->event_offset, | |
436 | .size = self->event_size, | |
437 | }, | |
7c6a1c65 PZ |
438 | }; |
439 | ||
db9f11e3 | 440 | memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features)); |
2ba08250 | 441 | |
7c6a1c65 | 442 | lseek(fd, 0, SEEK_SET); |
d5eed904 ACM |
443 | err = do_write(fd, &f_header, sizeof(f_header)); |
444 | if (err < 0) { | |
445 | pr_debug("failed to write perf header\n"); | |
446 | return err; | |
447 | } | |
7c6a1c65 PZ |
448 | lseek(fd, self->data_offset + self->data_size, SEEK_SET); |
449 | ||
450 | self->frozen = 1; | |
d5eed904 | 451 | return 0; |
7c6a1c65 PZ |
452 | } |
453 | ||
769885f3 | 454 | static int do_read(int fd, void *buf, size_t size) |
7c6a1c65 PZ |
455 | { |
456 | while (size) { | |
457 | int ret = read(fd, buf, size); | |
458 | ||
769885f3 ACM |
459 | if (ret <= 0) |
460 | return -1; | |
7c6a1c65 PZ |
461 | |
462 | size -= ret; | |
463 | buf += ret; | |
464 | } | |
769885f3 ACM |
465 | |
466 | return 0; | |
7c6a1c65 PZ |
467 | } |
468 | ||
ba21594c ACM |
469 | static int perf_header__getbuffer64(struct perf_header *self, |
470 | int fd, void *buf, size_t size) | |
471 | { | |
472 | if (do_read(fd, buf, size)) | |
473 | return -1; | |
474 | ||
475 | if (self->needs_swap) | |
476 | mem_bswap_64(buf, size); | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
37562eac ACM |
481 | int perf_header__process_sections(struct perf_header *self, int fd, |
482 | int (*process)(struct perf_file_section *self, | |
ba21594c | 483 | struct perf_header *ph, |
37562eac | 484 | int feat, int fd)) |
2ba08250 | 485 | { |
9e827dd0 FW |
486 | struct perf_file_section *feat_sec; |
487 | int nr_sections; | |
488 | int sec_size; | |
489 | int idx = 0; | |
769885f3 | 490 | int err = -1, feat = 1; |
9e827dd0 FW |
491 | |
492 | nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); | |
493 | if (!nr_sections) | |
37562eac | 494 | return 0; |
9e827dd0 FW |
495 | |
496 | feat_sec = calloc(sizeof(*feat_sec), nr_sections); | |
497 | if (!feat_sec) | |
37562eac | 498 | return -1; |
9e827dd0 FW |
499 | |
500 | sec_size = sizeof(*feat_sec) * nr_sections; | |
501 | ||
502 | lseek(fd, self->data_offset + self->data_size, SEEK_SET); | |
503 | ||
ba21594c | 504 | if (perf_header__getbuffer64(self, fd, feat_sec, sec_size)) |
769885f3 | 505 | goto out_free; |
9e827dd0 | 506 | |
769885f3 | 507 | err = 0; |
37562eac ACM |
508 | while (idx < nr_sections && feat < HEADER_LAST_FEATURE) { |
509 | if (perf_header__has_feat(self, feat)) { | |
510 | struct perf_file_section *sec = &feat_sec[idx++]; | |
2ba08250 | 511 | |
ba21594c | 512 | err = process(sec, self, feat, fd); |
37562eac ACM |
513 | if (err < 0) |
514 | break; | |
515 | } | |
516 | ++feat; | |
2ba08250 | 517 | } |
769885f3 | 518 | out_free: |
37562eac ACM |
519 | free(feat_sec); |
520 | return err; | |
769885f3 | 521 | } |
4778d2e4 | 522 | |
37562eac ACM |
523 | int perf_file_header__read(struct perf_file_header *self, |
524 | struct perf_header *ph, int fd) | |
525 | { | |
526 | lseek(fd, 0, SEEK_SET); | |
37562eac | 527 | |
769885f3 | 528 | if (do_read(fd, self, sizeof(*self)) || |
ba21594c | 529 | memcmp(&self->magic, __perf_magic, sizeof(self->magic))) |
37562eac ACM |
530 | return -1; |
531 | ||
ba21594c ACM |
532 | if (self->attr_size != sizeof(struct perf_file_attr)) { |
533 | u64 attr_size = bswap_64(self->attr_size); | |
534 | ||
535 | if (attr_size != sizeof(struct perf_file_attr)) | |
536 | return -1; | |
537 | ||
538 | mem_bswap_64(self, offsetof(struct perf_file_header, | |
539 | adds_features)); | |
540 | ph->needs_swap = true; | |
541 | } | |
542 | ||
37562eac ACM |
543 | if (self->size != sizeof(*self)) { |
544 | /* Support the previous format */ | |
545 | if (self->size == offsetof(typeof(*self), adds_features)) | |
546 | bitmap_zero(self->adds_features, HEADER_FEAT_BITS); | |
547 | else | |
548 | return -1; | |
4778d2e4 | 549 | } |
9e827dd0 | 550 | |
37562eac | 551 | memcpy(&ph->adds_features, &self->adds_features, |
ba21594c ACM |
552 | sizeof(ph->adds_features)); |
553 | /* | |
554 | * FIXME: hack that assumes that if we need swap the perf.data file | |
555 | * may be coming from an arch with a different word-size, ergo different | |
556 | * DEFINE_BITMAP format, investigate more later, but for now its mostly | |
557 | * safe to assume that we have a build-id section. Trace files probably | |
558 | * have several other issues in this realm anyway... | |
559 | */ | |
560 | if (ph->needs_swap) { | |
561 | memset(&ph->adds_features, 0, sizeof(ph->adds_features)); | |
562 | perf_header__set_feat(ph, HEADER_BUILD_ID); | |
563 | } | |
37562eac ACM |
564 | |
565 | ph->event_offset = self->event_types.offset; | |
ba21594c ACM |
566 | ph->event_size = self->event_types.size; |
567 | ph->data_offset = self->data.offset; | |
37562eac ACM |
568 | ph->data_size = self->data.size; |
569 | return 0; | |
570 | } | |
571 | ||
572 | static int perf_file_section__process(struct perf_file_section *self, | |
ba21594c | 573 | struct perf_header *ph, |
37562eac ACM |
574 | int feat, int fd) |
575 | { | |
576 | if (lseek(fd, self->offset, SEEK_SET) < 0) { | |
577 | pr_debug("Failed to lseek to %Ld offset for feature %d, " | |
578 | "continuing...\n", self->offset, feat); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | switch (feat) { | |
583 | case HEADER_TRACE_INFO: | |
584 | trace_report(fd); | |
585 | break; | |
586 | ||
587 | case HEADER_BUILD_ID: | |
ba21594c | 588 | if (perf_header__read_build_ids(ph, fd, self->offset, self->size)) |
37562eac ACM |
589 | pr_debug("Failed to read buildids, continuing...\n"); |
590 | break; | |
591 | default: | |
592 | pr_debug("unknown feature %d, continuing...\n", feat); | |
593 | } | |
594 | ||
595 | return 0; | |
596 | } | |
2ba08250 | 597 | |
4dc0a04b | 598 | int perf_header__read(struct perf_header *self, int fd) |
7c6a1c65 | 599 | { |
ba21594c | 600 | struct perf_file_header f_header; |
7c6a1c65 PZ |
601 | struct perf_file_attr f_attr; |
602 | u64 f_id; | |
7c6a1c65 PZ |
603 | int nr_attrs, nr_ids, i, j; |
604 | ||
4dc0a04b ACM |
605 | if (perf_file_header__read(&f_header, self, fd) < 0) { |
606 | pr_debug("incompatible file format\n"); | |
607 | return -EINVAL; | |
608 | } | |
7c6a1c65 PZ |
609 | |
610 | nr_attrs = f_header.attrs.size / sizeof(f_attr); | |
611 | lseek(fd, f_header.attrs.offset, SEEK_SET); | |
612 | ||
613 | for (i = 0; i < nr_attrs; i++) { | |
614 | struct perf_header_attr *attr; | |
1c222bce | 615 | off_t tmp; |
7c6a1c65 | 616 | |
ba21594c | 617 | if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr))) |
769885f3 | 618 | goto out_errno; |
ba21594c | 619 | |
1c222bce | 620 | tmp = lseek(fd, 0, SEEK_CUR); |
7c6a1c65 PZ |
621 | |
622 | attr = perf_header_attr__new(&f_attr.attr); | |
dc79c0fc | 623 | if (attr == NULL) |
4dc0a04b | 624 | return -ENOMEM; |
7c6a1c65 PZ |
625 | |
626 | nr_ids = f_attr.ids.size / sizeof(u64); | |
627 | lseek(fd, f_attr.ids.offset, SEEK_SET); | |
628 | ||
629 | for (j = 0; j < nr_ids; j++) { | |
ba21594c | 630 | if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id))) |
769885f3 | 631 | goto out_errno; |
7c6a1c65 | 632 | |
4dc0a04b ACM |
633 | if (perf_header_attr__add_id(attr, f_id) < 0) { |
634 | perf_header_attr__delete(attr); | |
635 | return -ENOMEM; | |
636 | } | |
637 | } | |
638 | if (perf_header__add_attr(self, attr) < 0) { | |
639 | perf_header_attr__delete(attr); | |
640 | return -ENOMEM; | |
7c6a1c65 | 641 | } |
11deb1f9 | 642 | |
7c6a1c65 PZ |
643 | lseek(fd, tmp, SEEK_SET); |
644 | } | |
645 | ||
8755a8f2 AV |
646 | if (f_header.event_types.size) { |
647 | lseek(fd, f_header.event_types.offset, SEEK_SET); | |
648 | events = malloc(f_header.event_types.size); | |
4dc0a04b ACM |
649 | if (events == NULL) |
650 | return -ENOMEM; | |
ba21594c ACM |
651 | if (perf_header__getbuffer64(self, fd, events, |
652 | f_header.event_types.size)) | |
769885f3 | 653 | goto out_errno; |
8755a8f2 AV |
654 | event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type); |
655 | } | |
03456a15 | 656 | |
37562eac | 657 | perf_header__process_sections(self, fd, perf_file_section__process); |
4778d2e4 | 658 | |
2e01d179 | 659 | lseek(fd, self->data_offset, SEEK_SET); |
7c6a1c65 PZ |
660 | |
661 | self->frozen = 1; | |
4dc0a04b | 662 | return 0; |
769885f3 ACM |
663 | out_errno: |
664 | return -errno; | |
7c6a1c65 | 665 | } |
0d3a5c88 FW |
666 | |
667 | u64 perf_header__sample_type(struct perf_header *header) | |
668 | { | |
669 | u64 type = 0; | |
670 | int i; | |
671 | ||
672 | for (i = 0; i < header->attrs; i++) { | |
673 | struct perf_header_attr *attr = header->attr[i]; | |
674 | ||
675 | if (!type) | |
676 | type = attr->attr.sample_type; | |
677 | else if (type != attr->attr.sample_type) | |
678 | die("non matching sample_type"); | |
679 | } | |
680 | ||
681 | return type; | |
682 | } | |
683 | ||
cdd6c482 | 684 | struct perf_event_attr * |
0d3a5c88 FW |
685 | perf_header__find_attr(u64 id, struct perf_header *header) |
686 | { | |
687 | int i; | |
688 | ||
689 | for (i = 0; i < header->attrs; i++) { | |
690 | struct perf_header_attr *attr = header->attr[i]; | |
691 | int j; | |
692 | ||
693 | for (j = 0; j < attr->ids; j++) { | |
694 | if (attr->id[j] == id) | |
695 | return &attr->attr; | |
696 | } | |
697 | } | |
698 | ||
699 | return NULL; | |
700 | } |