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cdd059d7 JO |
1 | #include "symbol.h" |
2 | #include "dso.h" | |
3 | #include "util.h" | |
4 | #include "debug.h" | |
5 | ||
6 | char dso__symtab_origin(const struct dso *dso) | |
7 | { | |
8 | static const char origin[] = { | |
9 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', | |
10 | [DSO_BINARY_TYPE__VMLINUX] = 'v', | |
11 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
12 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
13 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
14 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', | |
15 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
16 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
17 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
18 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
19 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', | |
20 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
21 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', | |
22 | }; | |
23 | ||
24 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
25 | return '!'; | |
26 | return origin[dso->symtab_type]; | |
27 | } | |
28 | ||
29 | int dso__binary_type_file(struct dso *dso, enum dso_binary_type type, | |
30 | char *root_dir, char *file, size_t size) | |
31 | { | |
32 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
33 | int ret = 0; | |
34 | ||
35 | switch (type) { | |
36 | case DSO_BINARY_TYPE__DEBUGLINK: { | |
37 | char *debuglink; | |
38 | ||
39 | strncpy(file, dso->long_name, size); | |
40 | debuglink = file + dso->long_name_len; | |
41 | while (debuglink != file && *debuglink != '/') | |
42 | debuglink--; | |
43 | if (*debuglink == '/') | |
44 | debuglink++; | |
45 | filename__read_debuglink(dso->long_name, debuglink, | |
46 | size - (debuglink - file)); | |
47 | } | |
48 | break; | |
49 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
50 | /* skip the locally configured cache if a symfs is given */ | |
51 | if (symbol_conf.symfs[0] || | |
52 | (dso__build_id_filename(dso, file, size) == NULL)) | |
53 | ret = -1; | |
54 | break; | |
55 | ||
56 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
57 | snprintf(file, size, "%s/usr/lib/debug%s.debug", | |
58 | symbol_conf.symfs, dso->long_name); | |
59 | break; | |
60 | ||
61 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
62 | snprintf(file, size, "%s/usr/lib/debug%s", | |
63 | symbol_conf.symfs, dso->long_name); | |
64 | break; | |
65 | ||
66 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
67 | if (!dso->has_build_id) { | |
68 | ret = -1; | |
69 | break; | |
70 | } | |
71 | ||
72 | build_id__sprintf(dso->build_id, | |
73 | sizeof(dso->build_id), | |
74 | build_id_hex); | |
75 | snprintf(file, size, | |
76 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", | |
77 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
78 | break; | |
79 | ||
80 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
81 | snprintf(file, size, "%s%s", | |
82 | symbol_conf.symfs, dso->long_name); | |
83 | break; | |
84 | ||
85 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
86 | snprintf(file, size, "%s%s%s", symbol_conf.symfs, | |
87 | root_dir, dso->long_name); | |
88 | break; | |
89 | ||
90 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
91 | snprintf(file, size, "%s%s", symbol_conf.symfs, | |
92 | dso->long_name); | |
93 | break; | |
94 | ||
95 | default: | |
96 | case DSO_BINARY_TYPE__KALLSYMS: | |
97 | case DSO_BINARY_TYPE__VMLINUX: | |
98 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
99 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
100 | case DSO_BINARY_TYPE__JAVA_JIT: | |
101 | case DSO_BINARY_TYPE__NOT_FOUND: | |
102 | ret = -1; | |
103 | break; | |
104 | } | |
105 | ||
106 | return ret; | |
107 | } | |
108 | ||
109 | static int open_dso(struct dso *dso, struct machine *machine) | |
110 | { | |
111 | char *root_dir = (char *) ""; | |
112 | char *name; | |
113 | int fd; | |
114 | ||
115 | name = malloc(PATH_MAX); | |
116 | if (!name) | |
117 | return -ENOMEM; | |
118 | ||
119 | if (machine) | |
120 | root_dir = machine->root_dir; | |
121 | ||
122 | if (dso__binary_type_file(dso, dso->data_type, | |
123 | root_dir, name, PATH_MAX)) { | |
124 | free(name); | |
125 | return -EINVAL; | |
126 | } | |
127 | ||
128 | fd = open(name, O_RDONLY); | |
129 | free(name); | |
130 | return fd; | |
131 | } | |
132 | ||
133 | int dso__data_fd(struct dso *dso, struct machine *machine) | |
134 | { | |
135 | static enum dso_binary_type binary_type_data[] = { | |
136 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
137 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
138 | DSO_BINARY_TYPE__NOT_FOUND, | |
139 | }; | |
140 | int i = 0; | |
141 | ||
142 | if (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND) | |
143 | return open_dso(dso, machine); | |
144 | ||
145 | do { | |
146 | int fd; | |
147 | ||
148 | dso->data_type = binary_type_data[i++]; | |
149 | ||
150 | fd = open_dso(dso, machine); | |
151 | if (fd >= 0) | |
152 | return fd; | |
153 | ||
154 | } while (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND); | |
155 | ||
156 | return -EINVAL; | |
157 | } | |
158 | ||
159 | static void | |
160 | dso_cache__free(struct rb_root *root) | |
161 | { | |
162 | struct rb_node *next = rb_first(root); | |
163 | ||
164 | while (next) { | |
165 | struct dso_cache *cache; | |
166 | ||
167 | cache = rb_entry(next, struct dso_cache, rb_node); | |
168 | next = rb_next(&cache->rb_node); | |
169 | rb_erase(&cache->rb_node, root); | |
170 | free(cache); | |
171 | } | |
172 | } | |
173 | ||
174 | static struct dso_cache* | |
175 | dso_cache__find(struct rb_root *root, u64 offset) | |
176 | { | |
177 | struct rb_node **p = &root->rb_node; | |
178 | struct rb_node *parent = NULL; | |
179 | struct dso_cache *cache; | |
180 | ||
181 | while (*p != NULL) { | |
182 | u64 end; | |
183 | ||
184 | parent = *p; | |
185 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
186 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
187 | ||
188 | if (offset < cache->offset) | |
189 | p = &(*p)->rb_left; | |
190 | else if (offset >= end) | |
191 | p = &(*p)->rb_right; | |
192 | else | |
193 | return cache; | |
194 | } | |
195 | return NULL; | |
196 | } | |
197 | ||
198 | static void | |
199 | dso_cache__insert(struct rb_root *root, struct dso_cache *new) | |
200 | { | |
201 | struct rb_node **p = &root->rb_node; | |
202 | struct rb_node *parent = NULL; | |
203 | struct dso_cache *cache; | |
204 | u64 offset = new->offset; | |
205 | ||
206 | while (*p != NULL) { | |
207 | u64 end; | |
208 | ||
209 | parent = *p; | |
210 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
211 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
212 | ||
213 | if (offset < cache->offset) | |
214 | p = &(*p)->rb_left; | |
215 | else if (offset >= end) | |
216 | p = &(*p)->rb_right; | |
217 | } | |
218 | ||
219 | rb_link_node(&new->rb_node, parent, p); | |
220 | rb_insert_color(&new->rb_node, root); | |
221 | } | |
222 | ||
223 | static ssize_t | |
224 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
225 | u8 *data, u64 size) | |
226 | { | |
227 | u64 cache_offset = offset - cache->offset; | |
228 | u64 cache_size = min(cache->size - cache_offset, size); | |
229 | ||
230 | memcpy(data, cache->data + cache_offset, cache_size); | |
231 | return cache_size; | |
232 | } | |
233 | ||
234 | static ssize_t | |
235 | dso_cache__read(struct dso *dso, struct machine *machine, | |
236 | u64 offset, u8 *data, ssize_t size) | |
237 | { | |
238 | struct dso_cache *cache; | |
239 | ssize_t ret; | |
240 | int fd; | |
241 | ||
242 | fd = dso__data_fd(dso, machine); | |
243 | if (fd < 0) | |
244 | return -1; | |
245 | ||
246 | do { | |
247 | u64 cache_offset; | |
248 | ||
249 | ret = -ENOMEM; | |
250 | ||
251 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); | |
252 | if (!cache) | |
253 | break; | |
254 | ||
255 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
256 | ret = -EINVAL; | |
257 | ||
258 | if (-1 == lseek(fd, cache_offset, SEEK_SET)) | |
259 | break; | |
260 | ||
261 | ret = read(fd, cache->data, DSO__DATA_CACHE_SIZE); | |
262 | if (ret <= 0) | |
263 | break; | |
264 | ||
265 | cache->offset = cache_offset; | |
266 | cache->size = ret; | |
267 | dso_cache__insert(&dso->cache, cache); | |
268 | ||
269 | ret = dso_cache__memcpy(cache, offset, data, size); | |
270 | ||
271 | } while (0); | |
272 | ||
273 | if (ret <= 0) | |
274 | free(cache); | |
275 | ||
276 | close(fd); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, | |
281 | u64 offset, u8 *data, ssize_t size) | |
282 | { | |
283 | struct dso_cache *cache; | |
284 | ||
285 | cache = dso_cache__find(&dso->cache, offset); | |
286 | if (cache) | |
287 | return dso_cache__memcpy(cache, offset, data, size); | |
288 | else | |
289 | return dso_cache__read(dso, machine, offset, data, size); | |
290 | } | |
291 | ||
292 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, | |
293 | u64 offset, u8 *data, ssize_t size) | |
294 | { | |
295 | ssize_t r = 0; | |
296 | u8 *p = data; | |
297 | ||
298 | do { | |
299 | ssize_t ret; | |
300 | ||
301 | ret = dso_cache_read(dso, machine, offset, p, size); | |
302 | if (ret < 0) | |
303 | return ret; | |
304 | ||
305 | /* Reached EOF, return what we have. */ | |
306 | if (!ret) | |
307 | break; | |
308 | ||
309 | BUG_ON(ret > size); | |
310 | ||
311 | r += ret; | |
312 | p += ret; | |
313 | offset += ret; | |
314 | size -= ret; | |
315 | ||
316 | } while (size); | |
317 | ||
318 | return r; | |
319 | } | |
320 | ||
321 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, | |
322 | struct machine *machine, u64 addr, | |
323 | u8 *data, ssize_t size) | |
324 | { | |
325 | u64 offset = map->map_ip(map, addr); | |
326 | return dso__data_read_offset(dso, machine, offset, data, size); | |
327 | } | |
328 | ||
329 | struct map *dso__new_map(const char *name) | |
330 | { | |
331 | struct map *map = NULL; | |
332 | struct dso *dso = dso__new(name); | |
333 | ||
334 | if (dso) | |
335 | map = map__new2(0, dso, MAP__FUNCTION); | |
336 | ||
337 | return map; | |
338 | } | |
339 | ||
340 | struct dso *dso__kernel_findnew(struct machine *machine, const char *name, | |
341 | const char *short_name, int dso_type) | |
342 | { | |
343 | /* | |
344 | * The kernel dso could be created by build_id processing. | |
345 | */ | |
346 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
347 | ||
348 | /* | |
349 | * We need to run this in all cases, since during the build_id | |
350 | * processing we had no idea this was the kernel dso. | |
351 | */ | |
352 | if (dso != NULL) { | |
353 | dso__set_short_name(dso, short_name); | |
354 | dso->kernel = dso_type; | |
355 | } | |
356 | ||
357 | return dso; | |
358 | } | |
359 | ||
360 | void dso__set_long_name(struct dso *dso, char *name) | |
361 | { | |
362 | if (name == NULL) | |
363 | return; | |
364 | dso->long_name = name; | |
365 | dso->long_name_len = strlen(name); | |
366 | } | |
367 | ||
368 | void dso__set_short_name(struct dso *dso, const char *name) | |
369 | { | |
370 | if (name == NULL) | |
371 | return; | |
372 | dso->short_name = name; | |
373 | dso->short_name_len = strlen(name); | |
374 | } | |
375 | ||
376 | static void dso__set_basename(struct dso *dso) | |
377 | { | |
378 | dso__set_short_name(dso, basename(dso->long_name)); | |
379 | } | |
380 | ||
381 | int dso__name_len(const struct dso *dso) | |
382 | { | |
383 | if (!dso) | |
384 | return strlen("[unknown]"); | |
385 | if (verbose) | |
386 | return dso->long_name_len; | |
387 | ||
388 | return dso->short_name_len; | |
389 | } | |
390 | ||
391 | bool dso__loaded(const struct dso *dso, enum map_type type) | |
392 | { | |
393 | return dso->loaded & (1 << type); | |
394 | } | |
395 | ||
396 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) | |
397 | { | |
398 | return dso->sorted_by_name & (1 << type); | |
399 | } | |
400 | ||
401 | void dso__set_sorted_by_name(struct dso *dso, enum map_type type) | |
402 | { | |
403 | dso->sorted_by_name |= (1 << type); | |
404 | } | |
405 | ||
406 | struct dso *dso__new(const char *name) | |
407 | { | |
408 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
409 | ||
410 | if (dso != NULL) { | |
411 | int i; | |
412 | strcpy(dso->name, name); | |
413 | dso__set_long_name(dso, dso->name); | |
414 | dso__set_short_name(dso, dso->name); | |
415 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
416 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; | |
417 | dso->cache = RB_ROOT; | |
418 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; | |
419 | dso->data_type = DSO_BINARY_TYPE__NOT_FOUND; | |
420 | dso->loaded = 0; | |
421 | dso->sorted_by_name = 0; | |
422 | dso->has_build_id = 0; | |
423 | dso->kernel = DSO_TYPE_USER; | |
424 | dso->needs_swap = DSO_SWAP__UNSET; | |
425 | INIT_LIST_HEAD(&dso->node); | |
426 | } | |
427 | ||
428 | return dso; | |
429 | } | |
430 | ||
431 | void dso__delete(struct dso *dso) | |
432 | { | |
433 | int i; | |
434 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
435 | symbols__delete(&dso->symbols[i]); | |
436 | if (dso->sname_alloc) | |
437 | free((char *)dso->short_name); | |
438 | if (dso->lname_alloc) | |
439 | free(dso->long_name); | |
440 | dso_cache__free(&dso->cache); | |
441 | free(dso); | |
442 | } | |
443 | ||
444 | void dso__set_build_id(struct dso *dso, void *build_id) | |
445 | { | |
446 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
447 | dso->has_build_id = 1; | |
448 | } | |
449 | ||
450 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
451 | { | |
452 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
453 | } | |
454 | ||
455 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
456 | { | |
457 | char path[PATH_MAX]; | |
458 | ||
459 | if (machine__is_default_guest(machine)) | |
460 | return; | |
461 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
462 | if (sysfs__read_build_id(path, dso->build_id, | |
463 | sizeof(dso->build_id)) == 0) | |
464 | dso->has_build_id = true; | |
465 | } | |
466 | ||
467 | int dso__kernel_module_get_build_id(struct dso *dso, | |
468 | const char *root_dir) | |
469 | { | |
470 | char filename[PATH_MAX]; | |
471 | /* | |
472 | * kernel module short names are of the form "[module]" and | |
473 | * we need just "module" here. | |
474 | */ | |
475 | const char *name = dso->short_name + 1; | |
476 | ||
477 | snprintf(filename, sizeof(filename), | |
478 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
479 | root_dir, (int)strlen(name) - 1, name); | |
480 | ||
481 | if (sysfs__read_build_id(filename, dso->build_id, | |
482 | sizeof(dso->build_id)) == 0) | |
483 | dso->has_build_id = true; | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
489 | { | |
490 | bool have_build_id = false; | |
491 | struct dso *pos; | |
492 | ||
493 | list_for_each_entry(pos, head, node) { | |
494 | if (with_hits && !pos->hit) | |
495 | continue; | |
496 | if (pos->has_build_id) { | |
497 | have_build_id = true; | |
498 | continue; | |
499 | } | |
500 | if (filename__read_build_id(pos->long_name, pos->build_id, | |
501 | sizeof(pos->build_id)) > 0) { | |
502 | have_build_id = true; | |
503 | pos->has_build_id = true; | |
504 | } | |
505 | } | |
506 | ||
507 | return have_build_id; | |
508 | } | |
509 | ||
510 | void dsos__add(struct list_head *head, struct dso *dso) | |
511 | { | |
512 | list_add_tail(&dso->node, head); | |
513 | } | |
514 | ||
515 | struct dso *dsos__find(struct list_head *head, const char *name) | |
516 | { | |
517 | struct dso *pos; | |
518 | ||
519 | list_for_each_entry(pos, head, node) | |
520 | if (strcmp(pos->long_name, name) == 0) | |
521 | return pos; | |
522 | return NULL; | |
523 | } | |
524 | ||
525 | struct dso *__dsos__findnew(struct list_head *head, const char *name) | |
526 | { | |
527 | struct dso *dso = dsos__find(head, name); | |
528 | ||
529 | if (!dso) { | |
530 | dso = dso__new(name); | |
531 | if (dso != NULL) { | |
532 | dsos__add(head, dso); | |
533 | dso__set_basename(dso); | |
534 | } | |
535 | } | |
536 | ||
537 | return dso; | |
538 | } | |
539 | ||
540 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, | |
541 | bool with_hits) | |
542 | { | |
543 | struct dso *pos; | |
544 | size_t ret = 0; | |
545 | ||
546 | list_for_each_entry(pos, head, node) { | |
547 | if (with_hits && !pos->hit) | |
548 | continue; | |
549 | ret += dso__fprintf_buildid(pos, fp); | |
550 | ret += fprintf(fp, " %s\n", pos->long_name); | |
551 | } | |
552 | return ret; | |
553 | } | |
554 | ||
555 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
556 | { | |
557 | struct dso *pos; | |
558 | size_t ret = 0; | |
559 | ||
560 | list_for_each_entry(pos, head, node) { | |
561 | int i; | |
562 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
563 | ret += dso__fprintf(pos, i, fp); | |
564 | } | |
565 | ||
566 | return ret; | |
567 | } | |
568 | ||
569 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
570 | { | |
571 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
572 | ||
573 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
574 | return fprintf(fp, "%s", sbuild_id); | |
575 | } | |
576 | ||
577 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) | |
578 | { | |
579 | struct rb_node *nd; | |
580 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
581 | ||
582 | if (dso->short_name != dso->long_name) | |
583 | ret += fprintf(fp, "%s, ", dso->long_name); | |
584 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
585 | dso->loaded ? "" : "NOT "); | |
586 | ret += dso__fprintf_buildid(dso, fp); | |
587 | ret += fprintf(fp, ")\n"); | |
588 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { | |
589 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
590 | ret += symbol__fprintf(pos, fp); | |
591 | } | |
592 | ||
593 | return ret; | |
594 | } |