Commit | Line | Data |
---|---|---|
b8f46c5a XG |
1 | #define _LARGEFILE64_SOURCE |
2 | #define _FILE_OFFSET_BITS 64 | |
3 | ||
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> |
7c6a1c65 PZ |
11 | |
12 | #include "util.h" | |
13 | #include "header.h" | |
03456a15 FW |
14 | #include "../perf.h" |
15 | #include "trace-event.h" | |
301a0b02 | 16 | #include "session.h" |
8671dab9 | 17 | #include "symbol.h" |
4778d2e4 | 18 | #include "debug.h" |
7c6a1c65 PZ |
19 | |
20 | /* | |
ec60a3fe | 21 | * Create new perf.data header attribute: |
7c6a1c65 | 22 | */ |
cdd6c482 | 23 | struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr) |
7c6a1c65 PZ |
24 | { |
25 | struct perf_header_attr *self = malloc(sizeof(*self)); | |
26 | ||
dc79c0fc ACM |
27 | if (self != NULL) { |
28 | self->attr = *attr; | |
29 | self->ids = 0; | |
30 | self->size = 1; | |
31 | self->id = malloc(sizeof(u64)); | |
32 | if (self->id == NULL) { | |
33 | free(self); | |
34 | self = NULL; | |
35 | } | |
36 | } | |
7c6a1c65 PZ |
37 | |
38 | return self; | |
39 | } | |
40 | ||
11deb1f9 ACM |
41 | void perf_header_attr__delete(struct perf_header_attr *self) |
42 | { | |
43 | free(self->id); | |
44 | free(self); | |
45 | } | |
46 | ||
58754121 | 47 | int perf_header_attr__add_id(struct perf_header_attr *self, u64 id) |
7c6a1c65 PZ |
48 | { |
49 | int pos = self->ids; | |
50 | ||
51 | self->ids++; | |
52 | if (self->ids > self->size) { | |
58754121 ACM |
53 | int nsize = self->size * 2; |
54 | u64 *nid = realloc(self->id, nsize * sizeof(u64)); | |
55 | ||
56 | if (nid == NULL) | |
57 | return -1; | |
58 | ||
59 | self->size = nsize; | |
60 | self->id = nid; | |
7c6a1c65 PZ |
61 | } |
62 | self->id[pos] = id; | |
58754121 | 63 | return 0; |
7c6a1c65 PZ |
64 | } |
65 | ||
94c744b6 | 66 | int perf_header__init(struct perf_header *self) |
7c6a1c65 | 67 | { |
94c744b6 ACM |
68 | self->size = 1; |
69 | self->attr = malloc(sizeof(void *)); | |
70 | return self->attr == NULL ? -ENOMEM : 0; | |
7c6a1c65 PZ |
71 | } |
72 | ||
94c744b6 | 73 | void perf_header__exit(struct perf_header *self) |
4dc0a04b ACM |
74 | { |
75 | int i; | |
4dc0a04b | 76 | for (i = 0; i < self->attrs; ++i) |
94c744b6 | 77 | perf_header_attr__delete(self->attr[i]); |
4dc0a04b | 78 | free(self->attr); |
4dc0a04b ACM |
79 | } |
80 | ||
11deb1f9 ACM |
81 | int perf_header__add_attr(struct perf_header *self, |
82 | struct perf_header_attr *attr) | |
7c6a1c65 | 83 | { |
7c6a1c65 | 84 | if (self->frozen) |
11deb1f9 | 85 | return -1; |
7c6a1c65 | 86 | |
4dc0a04b | 87 | if (self->attrs == self->size) { |
11deb1f9 ACM |
88 | int nsize = self->size * 2; |
89 | struct perf_header_attr **nattr; | |
90 | ||
91 | nattr = realloc(self->attr, nsize * sizeof(void *)); | |
92 | if (nattr == NULL) | |
93 | return -1; | |
94 | ||
95 | self->size = nsize; | |
96 | self->attr = nattr; | |
7c6a1c65 | 97 | } |
4dc0a04b ACM |
98 | |
99 | self->attr[self->attrs++] = attr; | |
11deb1f9 | 100 | return 0; |
7c6a1c65 PZ |
101 | } |
102 | ||
ec60a3fe AV |
103 | #define MAX_EVENT_NAME 64 |
104 | ||
8755a8f2 AV |
105 | struct perf_trace_event_type { |
106 | u64 event_id; | |
ec60a3fe | 107 | char name[MAX_EVENT_NAME]; |
8755a8f2 AV |
108 | }; |
109 | ||
110 | static int event_count; | |
111 | static struct perf_trace_event_type *events; | |
112 | ||
ae99fb2c | 113 | int perf_header__push_event(u64 id, const char *name) |
8755a8f2 | 114 | { |
ec60a3fe | 115 | if (strlen(name) > MAX_EVENT_NAME) |
6beba7ad | 116 | pr_warning("Event %s will be truncated\n", name); |
8755a8f2 AV |
117 | |
118 | if (!events) { | |
119 | events = malloc(sizeof(struct perf_trace_event_type)); | |
ae99fb2c ACM |
120 | if (events == NULL) |
121 | return -ENOMEM; | |
8755a8f2 | 122 | } else { |
ae99fb2c ACM |
123 | struct perf_trace_event_type *nevents; |
124 | ||
125 | nevents = realloc(events, (event_count + 1) * sizeof(*events)); | |
126 | if (nevents == NULL) | |
127 | return -ENOMEM; | |
128 | events = nevents; | |
8755a8f2 AV |
129 | } |
130 | memset(&events[event_count], 0, sizeof(struct perf_trace_event_type)); | |
131 | events[event_count].event_id = id; | |
ec60a3fe | 132 | strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1); |
8755a8f2 | 133 | event_count++; |
ae99fb2c | 134 | return 0; |
8755a8f2 AV |
135 | } |
136 | ||
137 | char *perf_header__find_event(u64 id) | |
138 | { | |
139 | int i; | |
140 | for (i = 0 ; i < event_count; i++) { | |
141 | if (events[i].event_id == id) | |
142 | return events[i].name; | |
143 | } | |
144 | return NULL; | |
145 | } | |
146 | ||
7c6a1c65 PZ |
147 | static const char *__perf_magic = "PERFFILE"; |
148 | ||
149 | #define PERF_MAGIC (*(u64 *)__perf_magic) | |
150 | ||
7c6a1c65 | 151 | struct perf_file_attr { |
cdd6c482 | 152 | struct perf_event_attr attr; |
7c6a1c65 PZ |
153 | struct perf_file_section ids; |
154 | }; | |
155 | ||
8d06367f ACM |
156 | void perf_header__set_feat(struct perf_header *self, int feat) |
157 | { | |
158 | set_bit(feat, self->adds_features); | |
159 | } | |
160 | ||
161 | bool perf_header__has_feat(const struct perf_header *self, int feat) | |
162 | { | |
163 | return test_bit(feat, self->adds_features); | |
164 | } | |
165 | ||
3726cc75 | 166 | static int do_write(int fd, const void *buf, size_t size) |
7c6a1c65 PZ |
167 | { |
168 | while (size) { | |
169 | int ret = write(fd, buf, size); | |
170 | ||
171 | if (ret < 0) | |
d5eed904 | 172 | return -errno; |
7c6a1c65 PZ |
173 | |
174 | size -= ret; | |
175 | buf += ret; | |
176 | } | |
3726cc75 ACM |
177 | |
178 | return 0; | |
7c6a1c65 PZ |
179 | } |
180 | ||
f92cb24c ACM |
181 | #define NAME_ALIGN 64 |
182 | ||
183 | static int write_padded(int fd, const void *bf, size_t count, | |
184 | size_t count_aligned) | |
185 | { | |
186 | static const char zero_buf[NAME_ALIGN]; | |
187 | int err = do_write(fd, bf, count); | |
188 | ||
189 | if (!err) | |
190 | err = do_write(fd, zero_buf, count_aligned - count); | |
191 | ||
192 | return err; | |
193 | } | |
194 | ||
4cf40131 ACM |
195 | #define dsos__for_each_with_build_id(pos, head) \ |
196 | list_for_each_entry(pos, head, node) \ | |
197 | if (!pos->has_build_id) \ | |
198 | continue; \ | |
199 | else | |
200 | ||
a89e5abe | 201 | static int __dsos__write_buildid_table(struct list_head *head, u16 misc, int fd) |
8671dab9 | 202 | { |
e30a3d12 ACM |
203 | struct dso *pos; |
204 | ||
4cf40131 | 205 | dsos__for_each_with_build_id(pos, head) { |
d5eed904 | 206 | int err; |
e30a3d12 | 207 | struct build_id_event b; |
4cf40131 | 208 | size_t len = pos->long_name_len + 1; |
e30a3d12 | 209 | |
7691b1ec | 210 | len = ALIGN(len, NAME_ALIGN); |
e30a3d12 ACM |
211 | memset(&b, 0, sizeof(b)); |
212 | memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id)); | |
a89e5abe | 213 | b.header.misc = misc; |
e30a3d12 | 214 | b.header.size = sizeof(b) + len; |
d5eed904 ACM |
215 | err = do_write(fd, &b, sizeof(b)); |
216 | if (err < 0) | |
217 | return err; | |
f92cb24c ACM |
218 | err = write_padded(fd, pos->long_name, |
219 | pos->long_name_len + 1, len); | |
d5eed904 ACM |
220 | if (err < 0) |
221 | return err; | |
57f395a7 | 222 | } |
3726cc75 ACM |
223 | |
224 | return 0; | |
8671dab9 FW |
225 | } |
226 | ||
b0da954a ACM |
227 | static int dsos__write_buildid_table(int fd) |
228 | { | |
a89e5abe ACM |
229 | int err = __dsos__write_buildid_table(&dsos__kernel, |
230 | PERF_RECORD_MISC_KERNEL, fd); | |
b0da954a | 231 | if (err == 0) |
a89e5abe ACM |
232 | err = __dsos__write_buildid_table(&dsos__user, |
233 | PERF_RECORD_MISC_USER, fd); | |
b0da954a ACM |
234 | return err; |
235 | } | |
236 | ||
ef12a141 ACM |
237 | int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, |
238 | const char *name, bool is_kallsyms) | |
4cf40131 ACM |
239 | { |
240 | const size_t size = PATH_MAX; | |
241 | char *filename = malloc(size), | |
ef12a141 | 242 | *linkname = malloc(size), *targetname; |
4cf40131 ACM |
243 | int len, err = -1; |
244 | ||
245 | if (filename == NULL || linkname == NULL) | |
246 | goto out_free; | |
247 | ||
9e201442 | 248 | len = snprintf(filename, size, "%s%s%s", |
ef12a141 | 249 | debugdir, is_kallsyms ? "/" : "", name); |
4cf40131 ACM |
250 | if (mkdir_p(filename, 0755)) |
251 | goto out_free; | |
252 | ||
ef12a141 | 253 | snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id); |
4cf40131 | 254 | |
9e201442 ACM |
255 | if (access(filename, F_OK)) { |
256 | if (is_kallsyms) { | |
257 | if (copyfile("/proc/kallsyms", filename)) | |
258 | goto out_free; | |
ef12a141 | 259 | } else if (link(name, filename) && copyfile(name, filename)) |
9e201442 ACM |
260 | goto out_free; |
261 | } | |
4cf40131 ACM |
262 | |
263 | len = snprintf(linkname, size, "%s/.build-id/%.2s", | |
264 | debugdir, sbuild_id); | |
265 | ||
266 | if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) | |
267 | goto out_free; | |
268 | ||
269 | snprintf(linkname + len, size - len, "/%s", sbuild_id + 2); | |
270 | targetname = filename + strlen(debugdir) - 5; | |
271 | memcpy(targetname, "../..", 5); | |
272 | ||
273 | if (symlink(targetname, linkname) == 0) | |
274 | err = 0; | |
275 | out_free: | |
276 | free(filename); | |
277 | free(linkname); | |
278 | return err; | |
279 | } | |
280 | ||
ef12a141 ACM |
281 | static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size, |
282 | const char *name, const char *debugdir, | |
283 | bool is_kallsyms) | |
284 | { | |
285 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
286 | ||
287 | build_id__sprintf(build_id, build_id_size, sbuild_id); | |
288 | ||
289 | return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms); | |
290 | } | |
291 | ||
292 | int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir) | |
293 | { | |
294 | const size_t size = PATH_MAX; | |
295 | char *filename = malloc(size), | |
296 | *linkname = malloc(size); | |
297 | int err = -1; | |
298 | ||
299 | if (filename == NULL || linkname == NULL) | |
300 | goto out_free; | |
301 | ||
302 | snprintf(linkname, size, "%s/.build-id/%.2s/%s", | |
303 | debugdir, sbuild_id, sbuild_id + 2); | |
304 | ||
305 | if (access(linkname, F_OK)) | |
306 | goto out_free; | |
307 | ||
308 | if (readlink(linkname, filename, size) < 0) | |
309 | goto out_free; | |
310 | ||
311 | if (unlink(linkname)) | |
312 | goto out_free; | |
313 | ||
314 | /* | |
315 | * Since the link is relative, we must make it absolute: | |
316 | */ | |
317 | snprintf(linkname, size, "%s/.build-id/%.2s/%s", | |
318 | debugdir, sbuild_id, filename); | |
319 | ||
320 | if (unlink(linkname)) | |
321 | goto out_free; | |
322 | ||
323 | err = 0; | |
324 | out_free: | |
325 | free(filename); | |
326 | free(linkname); | |
327 | return err; | |
328 | } | |
329 | ||
330 | static int dso__cache_build_id(struct dso *self, const char *debugdir) | |
331 | { | |
332 | bool is_kallsyms = self->kernel && self->long_name[0] != '/'; | |
333 | ||
334 | return build_id_cache__add_b(self->build_id, sizeof(self->build_id), | |
335 | self->long_name, debugdir, is_kallsyms); | |
336 | } | |
337 | ||
4cf40131 ACM |
338 | static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir) |
339 | { | |
340 | struct dso *pos; | |
341 | int err = 0; | |
342 | ||
343 | dsos__for_each_with_build_id(pos, head) | |
344 | if (dso__cache_build_id(pos, debugdir)) | |
345 | err = -1; | |
346 | ||
347 | return err; | |
348 | } | |
349 | ||
350 | static int dsos__cache_build_ids(void) | |
351 | { | |
352 | int err_kernel, err_user; | |
353 | char debugdir[PATH_MAX]; | |
354 | ||
355 | snprintf(debugdir, sizeof(debugdir), "%s/%s", getenv("HOME"), | |
356 | DEBUG_CACHE_DIR); | |
357 | ||
358 | if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) | |
359 | return -1; | |
360 | ||
361 | err_kernel = __dsos__cache_build_ids(&dsos__kernel, debugdir); | |
362 | err_user = __dsos__cache_build_ids(&dsos__user, debugdir); | |
363 | return err_kernel || err_user ? -1 : 0; | |
364 | } | |
365 | ||
d5eed904 | 366 | static int perf_header__adds_write(struct perf_header *self, int fd) |
2ba08250 | 367 | { |
9e827dd0 FW |
368 | int nr_sections; |
369 | struct perf_file_section *feat_sec; | |
370 | int sec_size; | |
371 | u64 sec_start; | |
d5eed904 | 372 | int idx = 0, err; |
9e827dd0 | 373 | |
e30a3d12 | 374 | if (dsos__read_build_ids()) |
9e827dd0 FW |
375 | perf_header__set_feat(self, HEADER_BUILD_ID); |
376 | ||
377 | nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); | |
378 | if (!nr_sections) | |
d5eed904 | 379 | return 0; |
9e827dd0 FW |
380 | |
381 | feat_sec = calloc(sizeof(*feat_sec), nr_sections); | |
d5eed904 ACM |
382 | if (feat_sec == NULL) |
383 | return -ENOMEM; | |
9e827dd0 FW |
384 | |
385 | sec_size = sizeof(*feat_sec) * nr_sections; | |
386 | ||
387 | sec_start = self->data_offset + self->data_size; | |
b8f46c5a | 388 | lseek64(fd, sec_start + sec_size, SEEK_SET); |
2ba08250 | 389 | |
3e13ab2d | 390 | if (perf_header__has_feat(self, HEADER_TRACE_INFO)) { |
9e827dd0 FW |
391 | struct perf_file_section *trace_sec; |
392 | ||
393 | trace_sec = &feat_sec[idx++]; | |
394 | ||
2ba08250 | 395 | /* Write trace info */ |
b8f46c5a | 396 | trace_sec->offset = lseek64(fd, 0, SEEK_CUR); |
2ba08250 | 397 | read_tracing_data(fd, attrs, nr_counters); |
b8f46c5a | 398 | trace_sec->size = lseek64(fd, 0, SEEK_CUR) - trace_sec->offset; |
2ba08250 | 399 | } |
8671dab9 | 400 | |
57f395a7 | 401 | |
9e827dd0 FW |
402 | if (perf_header__has_feat(self, HEADER_BUILD_ID)) { |
403 | struct perf_file_section *buildid_sec; | |
404 | ||
405 | buildid_sec = &feat_sec[idx++]; | |
406 | ||
407 | /* Write build-ids */ | |
b8f46c5a | 408 | buildid_sec->offset = lseek64(fd, 0, SEEK_CUR); |
d5eed904 ACM |
409 | err = dsos__write_buildid_table(fd); |
410 | if (err < 0) { | |
411 | pr_debug("failed to write buildid table\n"); | |
412 | goto out_free; | |
413 | } | |
b8f46c5a XG |
414 | buildid_sec->size = lseek64(fd, 0, SEEK_CUR) - |
415 | buildid_sec->offset; | |
4cf40131 | 416 | dsos__cache_build_ids(); |
8671dab9 | 417 | } |
9e827dd0 | 418 | |
b8f46c5a | 419 | lseek64(fd, sec_start, SEEK_SET); |
d5eed904 ACM |
420 | err = do_write(fd, feat_sec, sec_size); |
421 | if (err < 0) | |
422 | pr_debug("failed to write feature section\n"); | |
423 | out_free: | |
9e827dd0 | 424 | free(feat_sec); |
d5eed904 | 425 | return err; |
9e827dd0 | 426 | } |
2ba08250 | 427 | |
d5eed904 | 428 | int perf_header__write(struct perf_header *self, int fd, bool at_exit) |
7c6a1c65 PZ |
429 | { |
430 | struct perf_file_header f_header; | |
431 | struct perf_file_attr f_attr; | |
432 | struct perf_header_attr *attr; | |
d5eed904 | 433 | int i, err; |
7c6a1c65 PZ |
434 | |
435 | lseek(fd, sizeof(f_header), SEEK_SET); | |
436 | ||
437 | ||
438 | for (i = 0; i < self->attrs; i++) { | |
439 | attr = self->attr[i]; | |
440 | ||
441 | attr->id_offset = lseek(fd, 0, SEEK_CUR); | |
d5eed904 ACM |
442 | err = do_write(fd, attr->id, attr->ids * sizeof(u64)); |
443 | if (err < 0) { | |
444 | pr_debug("failed to write perf header\n"); | |
445 | return err; | |
446 | } | |
7c6a1c65 PZ |
447 | } |
448 | ||
449 | ||
450 | self->attr_offset = lseek(fd, 0, SEEK_CUR); | |
451 | ||
452 | for (i = 0; i < self->attrs; i++) { | |
453 | attr = self->attr[i]; | |
454 | ||
455 | f_attr = (struct perf_file_attr){ | |
456 | .attr = attr->attr, | |
457 | .ids = { | |
458 | .offset = attr->id_offset, | |
459 | .size = attr->ids * sizeof(u64), | |
460 | } | |
461 | }; | |
d5eed904 ACM |
462 | err = do_write(fd, &f_attr, sizeof(f_attr)); |
463 | if (err < 0) { | |
464 | pr_debug("failed to write perf header attribute\n"); | |
465 | return err; | |
466 | } | |
7c6a1c65 PZ |
467 | } |
468 | ||
8755a8f2 AV |
469 | self->event_offset = lseek(fd, 0, SEEK_CUR); |
470 | self->event_size = event_count * sizeof(struct perf_trace_event_type); | |
d5eed904 ACM |
471 | if (events) { |
472 | err = do_write(fd, events, self->event_size); | |
473 | if (err < 0) { | |
474 | pr_debug("failed to write perf header events\n"); | |
475 | return err; | |
476 | } | |
477 | } | |
8755a8f2 | 478 | |
7c6a1c65 PZ |
479 | self->data_offset = lseek(fd, 0, SEEK_CUR); |
480 | ||
d5eed904 ACM |
481 | if (at_exit) { |
482 | err = perf_header__adds_write(self, fd); | |
483 | if (err < 0) | |
484 | return err; | |
485 | } | |
9e827dd0 | 486 | |
7c6a1c65 PZ |
487 | f_header = (struct perf_file_header){ |
488 | .magic = PERF_MAGIC, | |
489 | .size = sizeof(f_header), | |
490 | .attr_size = sizeof(f_attr), | |
491 | .attrs = { | |
492 | .offset = self->attr_offset, | |
493 | .size = self->attrs * sizeof(f_attr), | |
494 | }, | |
495 | .data = { | |
496 | .offset = self->data_offset, | |
497 | .size = self->data_size, | |
498 | }, | |
8755a8f2 AV |
499 | .event_types = { |
500 | .offset = self->event_offset, | |
501 | .size = self->event_size, | |
502 | }, | |
7c6a1c65 PZ |
503 | }; |
504 | ||
db9f11e3 | 505 | memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features)); |
2ba08250 | 506 | |
7c6a1c65 | 507 | lseek(fd, 0, SEEK_SET); |
d5eed904 ACM |
508 | err = do_write(fd, &f_header, sizeof(f_header)); |
509 | if (err < 0) { | |
510 | pr_debug("failed to write perf header\n"); | |
511 | return err; | |
512 | } | |
b8f46c5a | 513 | lseek64(fd, self->data_offset + self->data_size, SEEK_SET); |
7c6a1c65 PZ |
514 | |
515 | self->frozen = 1; | |
d5eed904 | 516 | return 0; |
7c6a1c65 PZ |
517 | } |
518 | ||
769885f3 | 519 | static int do_read(int fd, void *buf, size_t size) |
7c6a1c65 PZ |
520 | { |
521 | while (size) { | |
522 | int ret = read(fd, buf, size); | |
523 | ||
769885f3 ACM |
524 | if (ret <= 0) |
525 | return -1; | |
7c6a1c65 PZ |
526 | |
527 | size -= ret; | |
528 | buf += ret; | |
529 | } | |
769885f3 ACM |
530 | |
531 | return 0; | |
7c6a1c65 PZ |
532 | } |
533 | ||
ba21594c ACM |
534 | static int perf_header__getbuffer64(struct perf_header *self, |
535 | int fd, void *buf, size_t size) | |
536 | { | |
537 | if (do_read(fd, buf, size)) | |
538 | return -1; | |
539 | ||
540 | if (self->needs_swap) | |
541 | mem_bswap_64(buf, size); | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
37562eac ACM |
546 | int perf_header__process_sections(struct perf_header *self, int fd, |
547 | int (*process)(struct perf_file_section *self, | |
ba21594c | 548 | struct perf_header *ph, |
37562eac | 549 | int feat, int fd)) |
2ba08250 | 550 | { |
9e827dd0 FW |
551 | struct perf_file_section *feat_sec; |
552 | int nr_sections; | |
553 | int sec_size; | |
554 | int idx = 0; | |
769885f3 | 555 | int err = -1, feat = 1; |
9e827dd0 FW |
556 | |
557 | nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); | |
558 | if (!nr_sections) | |
37562eac | 559 | return 0; |
9e827dd0 FW |
560 | |
561 | feat_sec = calloc(sizeof(*feat_sec), nr_sections); | |
562 | if (!feat_sec) | |
37562eac | 563 | return -1; |
9e827dd0 FW |
564 | |
565 | sec_size = sizeof(*feat_sec) * nr_sections; | |
566 | ||
b8f46c5a | 567 | lseek64(fd, self->data_offset + self->data_size, SEEK_SET); |
9e827dd0 | 568 | |
ba21594c | 569 | if (perf_header__getbuffer64(self, fd, feat_sec, sec_size)) |
769885f3 | 570 | goto out_free; |
9e827dd0 | 571 | |
769885f3 | 572 | err = 0; |
37562eac ACM |
573 | while (idx < nr_sections && feat < HEADER_LAST_FEATURE) { |
574 | if (perf_header__has_feat(self, feat)) { | |
575 | struct perf_file_section *sec = &feat_sec[idx++]; | |
2ba08250 | 576 | |
ba21594c | 577 | err = process(sec, self, feat, fd); |
37562eac ACM |
578 | if (err < 0) |
579 | break; | |
580 | } | |
581 | ++feat; | |
2ba08250 | 582 | } |
769885f3 | 583 | out_free: |
37562eac ACM |
584 | free(feat_sec); |
585 | return err; | |
769885f3 | 586 | } |
4778d2e4 | 587 | |
37562eac ACM |
588 | int perf_file_header__read(struct perf_file_header *self, |
589 | struct perf_header *ph, int fd) | |
590 | { | |
591 | lseek(fd, 0, SEEK_SET); | |
37562eac | 592 | |
769885f3 | 593 | if (do_read(fd, self, sizeof(*self)) || |
ba21594c | 594 | memcmp(&self->magic, __perf_magic, sizeof(self->magic))) |
37562eac ACM |
595 | return -1; |
596 | ||
ba21594c ACM |
597 | if (self->attr_size != sizeof(struct perf_file_attr)) { |
598 | u64 attr_size = bswap_64(self->attr_size); | |
599 | ||
600 | if (attr_size != sizeof(struct perf_file_attr)) | |
601 | return -1; | |
602 | ||
603 | mem_bswap_64(self, offsetof(struct perf_file_header, | |
604 | adds_features)); | |
605 | ph->needs_swap = true; | |
606 | } | |
607 | ||
37562eac ACM |
608 | if (self->size != sizeof(*self)) { |
609 | /* Support the previous format */ | |
610 | if (self->size == offsetof(typeof(*self), adds_features)) | |
611 | bitmap_zero(self->adds_features, HEADER_FEAT_BITS); | |
612 | else | |
613 | return -1; | |
4778d2e4 | 614 | } |
9e827dd0 | 615 | |
37562eac | 616 | memcpy(&ph->adds_features, &self->adds_features, |
ba21594c ACM |
617 | sizeof(ph->adds_features)); |
618 | /* | |
619 | * FIXME: hack that assumes that if we need swap the perf.data file | |
620 | * may be coming from an arch with a different word-size, ergo different | |
621 | * DEFINE_BITMAP format, investigate more later, but for now its mostly | |
622 | * safe to assume that we have a build-id section. Trace files probably | |
623 | * have several other issues in this realm anyway... | |
624 | */ | |
625 | if (ph->needs_swap) { | |
626 | memset(&ph->adds_features, 0, sizeof(ph->adds_features)); | |
627 | perf_header__set_feat(ph, HEADER_BUILD_ID); | |
628 | } | |
37562eac ACM |
629 | |
630 | ph->event_offset = self->event_types.offset; | |
ba21594c ACM |
631 | ph->event_size = self->event_types.size; |
632 | ph->data_offset = self->data.offset; | |
37562eac ACM |
633 | ph->data_size = self->data.size; |
634 | return 0; | |
635 | } | |
636 | ||
637 | static int perf_file_section__process(struct perf_file_section *self, | |
ba21594c | 638 | struct perf_header *ph, |
37562eac ACM |
639 | int feat, int fd) |
640 | { | |
b8f46c5a | 641 | if (lseek64(fd, self->offset, SEEK_SET) < 0) { |
37562eac ACM |
642 | pr_debug("Failed to lseek to %Ld offset for feature %d, " |
643 | "continuing...\n", self->offset, feat); | |
644 | return 0; | |
645 | } | |
646 | ||
647 | switch (feat) { | |
648 | case HEADER_TRACE_INFO: | |
649 | trace_report(fd); | |
650 | break; | |
651 | ||
652 | case HEADER_BUILD_ID: | |
ba21594c | 653 | if (perf_header__read_build_ids(ph, fd, self->offset, self->size)) |
37562eac ACM |
654 | pr_debug("Failed to read buildids, continuing...\n"); |
655 | break; | |
656 | default: | |
657 | pr_debug("unknown feature %d, continuing...\n", feat); | |
658 | } | |
659 | ||
660 | return 0; | |
661 | } | |
2ba08250 | 662 | |
4dc0a04b | 663 | int perf_header__read(struct perf_header *self, int fd) |
7c6a1c65 | 664 | { |
ba21594c | 665 | struct perf_file_header f_header; |
7c6a1c65 PZ |
666 | struct perf_file_attr f_attr; |
667 | u64 f_id; | |
7c6a1c65 PZ |
668 | int nr_attrs, nr_ids, i, j; |
669 | ||
4dc0a04b ACM |
670 | if (perf_file_header__read(&f_header, self, fd) < 0) { |
671 | pr_debug("incompatible file format\n"); | |
672 | return -EINVAL; | |
673 | } | |
7c6a1c65 PZ |
674 | |
675 | nr_attrs = f_header.attrs.size / sizeof(f_attr); | |
676 | lseek(fd, f_header.attrs.offset, SEEK_SET); | |
677 | ||
678 | for (i = 0; i < nr_attrs; i++) { | |
679 | struct perf_header_attr *attr; | |
1c222bce | 680 | off_t tmp; |
7c6a1c65 | 681 | |
ba21594c | 682 | if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr))) |
769885f3 | 683 | goto out_errno; |
ba21594c | 684 | |
1c222bce | 685 | tmp = lseek(fd, 0, SEEK_CUR); |
7c6a1c65 PZ |
686 | |
687 | attr = perf_header_attr__new(&f_attr.attr); | |
dc79c0fc | 688 | if (attr == NULL) |
4dc0a04b | 689 | return -ENOMEM; |
7c6a1c65 PZ |
690 | |
691 | nr_ids = f_attr.ids.size / sizeof(u64); | |
692 | lseek(fd, f_attr.ids.offset, SEEK_SET); | |
693 | ||
694 | for (j = 0; j < nr_ids; j++) { | |
ba21594c | 695 | if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id))) |
769885f3 | 696 | goto out_errno; |
7c6a1c65 | 697 | |
4dc0a04b ACM |
698 | if (perf_header_attr__add_id(attr, f_id) < 0) { |
699 | perf_header_attr__delete(attr); | |
700 | return -ENOMEM; | |
701 | } | |
702 | } | |
703 | if (perf_header__add_attr(self, attr) < 0) { | |
704 | perf_header_attr__delete(attr); | |
705 | return -ENOMEM; | |
7c6a1c65 | 706 | } |
11deb1f9 | 707 | |
7c6a1c65 PZ |
708 | lseek(fd, tmp, SEEK_SET); |
709 | } | |
710 | ||
8755a8f2 AV |
711 | if (f_header.event_types.size) { |
712 | lseek(fd, f_header.event_types.offset, SEEK_SET); | |
713 | events = malloc(f_header.event_types.size); | |
4dc0a04b ACM |
714 | if (events == NULL) |
715 | return -ENOMEM; | |
ba21594c ACM |
716 | if (perf_header__getbuffer64(self, fd, events, |
717 | f_header.event_types.size)) | |
769885f3 | 718 | goto out_errno; |
8755a8f2 AV |
719 | event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type); |
720 | } | |
03456a15 | 721 | |
37562eac | 722 | perf_header__process_sections(self, fd, perf_file_section__process); |
4778d2e4 | 723 | |
2e01d179 | 724 | lseek(fd, self->data_offset, SEEK_SET); |
7c6a1c65 PZ |
725 | |
726 | self->frozen = 1; | |
4dc0a04b | 727 | return 0; |
769885f3 ACM |
728 | out_errno: |
729 | return -errno; | |
7c6a1c65 | 730 | } |
0d3a5c88 FW |
731 | |
732 | u64 perf_header__sample_type(struct perf_header *header) | |
733 | { | |
734 | u64 type = 0; | |
735 | int i; | |
736 | ||
737 | for (i = 0; i < header->attrs; i++) { | |
738 | struct perf_header_attr *attr = header->attr[i]; | |
739 | ||
740 | if (!type) | |
741 | type = attr->attr.sample_type; | |
742 | else if (type != attr->attr.sample_type) | |
743 | die("non matching sample_type"); | |
744 | } | |
745 | ||
746 | return type; | |
747 | } | |
748 | ||
cdd6c482 | 749 | struct perf_event_attr * |
0d3a5c88 FW |
750 | perf_header__find_attr(u64 id, struct perf_header *header) |
751 | { | |
752 | int i; | |
753 | ||
754 | for (i = 0; i < header->attrs; i++) { | |
755 | struct perf_header_attr *attr = header->attr[i]; | |
756 | int j; | |
757 | ||
758 | for (j = 0; j < attr->ids; j++) { | |
759 | if (attr->id[j] == id) | |
760 | return &attr->attr; | |
761 | } | |
762 | } | |
763 | ||
764 | return NULL; | |
765 | } |