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cdd059d7 JO |
1 | #include "symbol.h" |
2 | #include "dso.h" | |
69d2591a | 3 | #include "machine.h" |
cdd059d7 JO |
4 | #include "util.h" |
5 | #include "debug.h" | |
6 | ||
7 | char dso__symtab_origin(const struct dso *dso) | |
8 | { | |
9 | static const char origin[] = { | |
10 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', | |
11 | [DSO_BINARY_TYPE__VMLINUX] = 'v', | |
12 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
13 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
14 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
15 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', | |
16 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
17 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
18 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
19 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
20 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', | |
21 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
22 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', | |
23 | }; | |
24 | ||
25 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
26 | return '!'; | |
27 | return origin[dso->symtab_type]; | |
28 | } | |
29 | ||
30 | int dso__binary_type_file(struct dso *dso, enum dso_binary_type type, | |
31 | char *root_dir, char *file, size_t size) | |
32 | { | |
33 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
34 | int ret = 0; | |
35 | ||
36 | switch (type) { | |
37 | case DSO_BINARY_TYPE__DEBUGLINK: { | |
38 | char *debuglink; | |
39 | ||
40 | strncpy(file, dso->long_name, size); | |
41 | debuglink = file + dso->long_name_len; | |
42 | while (debuglink != file && *debuglink != '/') | |
43 | debuglink--; | |
44 | if (*debuglink == '/') | |
45 | debuglink++; | |
46 | filename__read_debuglink(dso->long_name, debuglink, | |
47 | size - (debuglink - file)); | |
48 | } | |
49 | break; | |
50 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
51 | /* skip the locally configured cache if a symfs is given */ | |
52 | if (symbol_conf.symfs[0] || | |
53 | (dso__build_id_filename(dso, file, size) == NULL)) | |
54 | ret = -1; | |
55 | break; | |
56 | ||
57 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
58 | snprintf(file, size, "%s/usr/lib/debug%s.debug", | |
59 | symbol_conf.symfs, dso->long_name); | |
60 | break; | |
61 | ||
62 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
63 | snprintf(file, size, "%s/usr/lib/debug%s", | |
64 | symbol_conf.symfs, dso->long_name); | |
65 | break; | |
66 | ||
67 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: | |
68 | if (!dso->has_build_id) { | |
69 | ret = -1; | |
70 | break; | |
71 | } | |
72 | ||
73 | build_id__sprintf(dso->build_id, | |
74 | sizeof(dso->build_id), | |
75 | build_id_hex); | |
76 | snprintf(file, size, | |
77 | "%s/usr/lib/debug/.build-id/%.2s/%s.debug", | |
78 | symbol_conf.symfs, build_id_hex, build_id_hex + 2); | |
79 | break; | |
80 | ||
81 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: | |
82 | snprintf(file, size, "%s%s", | |
83 | symbol_conf.symfs, dso->long_name); | |
84 | break; | |
85 | ||
86 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
87 | snprintf(file, size, "%s%s%s", symbol_conf.symfs, | |
88 | root_dir, dso->long_name); | |
89 | break; | |
90 | ||
91 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
92 | snprintf(file, size, "%s%s", symbol_conf.symfs, | |
93 | dso->long_name); | |
94 | break; | |
95 | ||
96 | default: | |
97 | case DSO_BINARY_TYPE__KALLSYMS: | |
98 | case DSO_BINARY_TYPE__VMLINUX: | |
99 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: | |
100 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
101 | case DSO_BINARY_TYPE__JAVA_JIT: | |
102 | case DSO_BINARY_TYPE__NOT_FOUND: | |
103 | ret = -1; | |
104 | break; | |
105 | } | |
106 | ||
107 | return ret; | |
108 | } | |
109 | ||
110 | static int open_dso(struct dso *dso, struct machine *machine) | |
111 | { | |
112 | char *root_dir = (char *) ""; | |
113 | char *name; | |
114 | int fd; | |
115 | ||
116 | name = malloc(PATH_MAX); | |
117 | if (!name) | |
118 | return -ENOMEM; | |
119 | ||
120 | if (machine) | |
121 | root_dir = machine->root_dir; | |
122 | ||
123 | if (dso__binary_type_file(dso, dso->data_type, | |
124 | root_dir, name, PATH_MAX)) { | |
125 | free(name); | |
126 | return -EINVAL; | |
127 | } | |
128 | ||
129 | fd = open(name, O_RDONLY); | |
130 | free(name); | |
131 | return fd; | |
132 | } | |
133 | ||
134 | int dso__data_fd(struct dso *dso, struct machine *machine) | |
135 | { | |
136 | static enum dso_binary_type binary_type_data[] = { | |
137 | DSO_BINARY_TYPE__BUILD_ID_CACHE, | |
138 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
139 | DSO_BINARY_TYPE__NOT_FOUND, | |
140 | }; | |
141 | int i = 0; | |
142 | ||
143 | if (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND) | |
144 | return open_dso(dso, machine); | |
145 | ||
146 | do { | |
147 | int fd; | |
148 | ||
149 | dso->data_type = binary_type_data[i++]; | |
150 | ||
151 | fd = open_dso(dso, machine); | |
152 | if (fd >= 0) | |
153 | return fd; | |
154 | ||
155 | } while (dso->data_type != DSO_BINARY_TYPE__NOT_FOUND); | |
156 | ||
157 | return -EINVAL; | |
158 | } | |
159 | ||
160 | static void | |
161 | dso_cache__free(struct rb_root *root) | |
162 | { | |
163 | struct rb_node *next = rb_first(root); | |
164 | ||
165 | while (next) { | |
166 | struct dso_cache *cache; | |
167 | ||
168 | cache = rb_entry(next, struct dso_cache, rb_node); | |
169 | next = rb_next(&cache->rb_node); | |
170 | rb_erase(&cache->rb_node, root); | |
171 | free(cache); | |
172 | } | |
173 | } | |
174 | ||
175 | static struct dso_cache* | |
176 | dso_cache__find(struct rb_root *root, u64 offset) | |
177 | { | |
178 | struct rb_node **p = &root->rb_node; | |
179 | struct rb_node *parent = NULL; | |
180 | struct dso_cache *cache; | |
181 | ||
182 | while (*p != NULL) { | |
183 | u64 end; | |
184 | ||
185 | parent = *p; | |
186 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
187 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
188 | ||
189 | if (offset < cache->offset) | |
190 | p = &(*p)->rb_left; | |
191 | else if (offset >= end) | |
192 | p = &(*p)->rb_right; | |
193 | else | |
194 | return cache; | |
195 | } | |
196 | return NULL; | |
197 | } | |
198 | ||
199 | static void | |
200 | dso_cache__insert(struct rb_root *root, struct dso_cache *new) | |
201 | { | |
202 | struct rb_node **p = &root->rb_node; | |
203 | struct rb_node *parent = NULL; | |
204 | struct dso_cache *cache; | |
205 | u64 offset = new->offset; | |
206 | ||
207 | while (*p != NULL) { | |
208 | u64 end; | |
209 | ||
210 | parent = *p; | |
211 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
212 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
213 | ||
214 | if (offset < cache->offset) | |
215 | p = &(*p)->rb_left; | |
216 | else if (offset >= end) | |
217 | p = &(*p)->rb_right; | |
218 | } | |
219 | ||
220 | rb_link_node(&new->rb_node, parent, p); | |
221 | rb_insert_color(&new->rb_node, root); | |
222 | } | |
223 | ||
224 | static ssize_t | |
225 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
226 | u8 *data, u64 size) | |
227 | { | |
228 | u64 cache_offset = offset - cache->offset; | |
229 | u64 cache_size = min(cache->size - cache_offset, size); | |
230 | ||
231 | memcpy(data, cache->data + cache_offset, cache_size); | |
232 | return cache_size; | |
233 | } | |
234 | ||
235 | static ssize_t | |
236 | dso_cache__read(struct dso *dso, struct machine *machine, | |
237 | u64 offset, u8 *data, ssize_t size) | |
238 | { | |
239 | struct dso_cache *cache; | |
240 | ssize_t ret; | |
241 | int fd; | |
242 | ||
243 | fd = dso__data_fd(dso, machine); | |
244 | if (fd < 0) | |
245 | return -1; | |
246 | ||
247 | do { | |
248 | u64 cache_offset; | |
249 | ||
250 | ret = -ENOMEM; | |
251 | ||
252 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); | |
253 | if (!cache) | |
254 | break; | |
255 | ||
256 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
257 | ret = -EINVAL; | |
258 | ||
259 | if (-1 == lseek(fd, cache_offset, SEEK_SET)) | |
260 | break; | |
261 | ||
262 | ret = read(fd, cache->data, DSO__DATA_CACHE_SIZE); | |
263 | if (ret <= 0) | |
264 | break; | |
265 | ||
266 | cache->offset = cache_offset; | |
267 | cache->size = ret; | |
268 | dso_cache__insert(&dso->cache, cache); | |
269 | ||
270 | ret = dso_cache__memcpy(cache, offset, data, size); | |
271 | ||
272 | } while (0); | |
273 | ||
274 | if (ret <= 0) | |
275 | free(cache); | |
276 | ||
277 | close(fd); | |
278 | return ret; | |
279 | } | |
280 | ||
281 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, | |
282 | u64 offset, u8 *data, ssize_t size) | |
283 | { | |
284 | struct dso_cache *cache; | |
285 | ||
286 | cache = dso_cache__find(&dso->cache, offset); | |
287 | if (cache) | |
288 | return dso_cache__memcpy(cache, offset, data, size); | |
289 | else | |
290 | return dso_cache__read(dso, machine, offset, data, size); | |
291 | } | |
292 | ||
293 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, | |
294 | u64 offset, u8 *data, ssize_t size) | |
295 | { | |
296 | ssize_t r = 0; | |
297 | u8 *p = data; | |
298 | ||
299 | do { | |
300 | ssize_t ret; | |
301 | ||
302 | ret = dso_cache_read(dso, machine, offset, p, size); | |
303 | if (ret < 0) | |
304 | return ret; | |
305 | ||
306 | /* Reached EOF, return what we have. */ | |
307 | if (!ret) | |
308 | break; | |
309 | ||
310 | BUG_ON(ret > size); | |
311 | ||
312 | r += ret; | |
313 | p += ret; | |
314 | offset += ret; | |
315 | size -= ret; | |
316 | ||
317 | } while (size); | |
318 | ||
319 | return r; | |
320 | } | |
321 | ||
322 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, | |
323 | struct machine *machine, u64 addr, | |
324 | u8 *data, ssize_t size) | |
325 | { | |
326 | u64 offset = map->map_ip(map, addr); | |
327 | return dso__data_read_offset(dso, machine, offset, data, size); | |
328 | } | |
329 | ||
330 | struct map *dso__new_map(const char *name) | |
331 | { | |
332 | struct map *map = NULL; | |
333 | struct dso *dso = dso__new(name); | |
334 | ||
335 | if (dso) | |
336 | map = map__new2(0, dso, MAP__FUNCTION); | |
337 | ||
338 | return map; | |
339 | } | |
340 | ||
341 | struct dso *dso__kernel_findnew(struct machine *machine, const char *name, | |
342 | const char *short_name, int dso_type) | |
343 | { | |
344 | /* | |
345 | * The kernel dso could be created by build_id processing. | |
346 | */ | |
347 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
348 | ||
349 | /* | |
350 | * We need to run this in all cases, since during the build_id | |
351 | * processing we had no idea this was the kernel dso. | |
352 | */ | |
353 | if (dso != NULL) { | |
354 | dso__set_short_name(dso, short_name); | |
355 | dso->kernel = dso_type; | |
356 | } | |
357 | ||
358 | return dso; | |
359 | } | |
360 | ||
361 | void dso__set_long_name(struct dso *dso, char *name) | |
362 | { | |
363 | if (name == NULL) | |
364 | return; | |
365 | dso->long_name = name; | |
366 | dso->long_name_len = strlen(name); | |
367 | } | |
368 | ||
369 | void dso__set_short_name(struct dso *dso, const char *name) | |
370 | { | |
371 | if (name == NULL) | |
372 | return; | |
373 | dso->short_name = name; | |
374 | dso->short_name_len = strlen(name); | |
375 | } | |
376 | ||
377 | static void dso__set_basename(struct dso *dso) | |
378 | { | |
379 | dso__set_short_name(dso, basename(dso->long_name)); | |
380 | } | |
381 | ||
382 | int dso__name_len(const struct dso *dso) | |
383 | { | |
384 | if (!dso) | |
385 | return strlen("[unknown]"); | |
386 | if (verbose) | |
387 | return dso->long_name_len; | |
388 | ||
389 | return dso->short_name_len; | |
390 | } | |
391 | ||
392 | bool dso__loaded(const struct dso *dso, enum map_type type) | |
393 | { | |
394 | return dso->loaded & (1 << type); | |
395 | } | |
396 | ||
397 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) | |
398 | { | |
399 | return dso->sorted_by_name & (1 << type); | |
400 | } | |
401 | ||
402 | void dso__set_sorted_by_name(struct dso *dso, enum map_type type) | |
403 | { | |
404 | dso->sorted_by_name |= (1 << type); | |
405 | } | |
406 | ||
407 | struct dso *dso__new(const char *name) | |
408 | { | |
409 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
410 | ||
411 | if (dso != NULL) { | |
412 | int i; | |
413 | strcpy(dso->name, name); | |
414 | dso__set_long_name(dso, dso->name); | |
415 | dso__set_short_name(dso, dso->name); | |
416 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
417 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; | |
418 | dso->cache = RB_ROOT; | |
419 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; | |
420 | dso->data_type = DSO_BINARY_TYPE__NOT_FOUND; | |
421 | dso->loaded = 0; | |
422 | dso->sorted_by_name = 0; | |
423 | dso->has_build_id = 0; | |
424 | dso->kernel = DSO_TYPE_USER; | |
425 | dso->needs_swap = DSO_SWAP__UNSET; | |
426 | INIT_LIST_HEAD(&dso->node); | |
427 | } | |
428 | ||
429 | return dso; | |
430 | } | |
431 | ||
432 | void dso__delete(struct dso *dso) | |
433 | { | |
434 | int i; | |
435 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
436 | symbols__delete(&dso->symbols[i]); | |
437 | if (dso->sname_alloc) | |
438 | free((char *)dso->short_name); | |
439 | if (dso->lname_alloc) | |
440 | free(dso->long_name); | |
441 | dso_cache__free(&dso->cache); | |
442 | free(dso); | |
443 | } | |
444 | ||
445 | void dso__set_build_id(struct dso *dso, void *build_id) | |
446 | { | |
447 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
448 | dso->has_build_id = 1; | |
449 | } | |
450 | ||
451 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
452 | { | |
453 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
454 | } | |
455 | ||
456 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
457 | { | |
458 | char path[PATH_MAX]; | |
459 | ||
460 | if (machine__is_default_guest(machine)) | |
461 | return; | |
462 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
463 | if (sysfs__read_build_id(path, dso->build_id, | |
464 | sizeof(dso->build_id)) == 0) | |
465 | dso->has_build_id = true; | |
466 | } | |
467 | ||
468 | int dso__kernel_module_get_build_id(struct dso *dso, | |
469 | const char *root_dir) | |
470 | { | |
471 | char filename[PATH_MAX]; | |
472 | /* | |
473 | * kernel module short names are of the form "[module]" and | |
474 | * we need just "module" here. | |
475 | */ | |
476 | const char *name = dso->short_name + 1; | |
477 | ||
478 | snprintf(filename, sizeof(filename), | |
479 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
480 | root_dir, (int)strlen(name) - 1, name); | |
481 | ||
482 | if (sysfs__read_build_id(filename, dso->build_id, | |
483 | sizeof(dso->build_id)) == 0) | |
484 | dso->has_build_id = true; | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
490 | { | |
491 | bool have_build_id = false; | |
492 | struct dso *pos; | |
493 | ||
494 | list_for_each_entry(pos, head, node) { | |
495 | if (with_hits && !pos->hit) | |
496 | continue; | |
497 | if (pos->has_build_id) { | |
498 | have_build_id = true; | |
499 | continue; | |
500 | } | |
501 | if (filename__read_build_id(pos->long_name, pos->build_id, | |
502 | sizeof(pos->build_id)) > 0) { | |
503 | have_build_id = true; | |
504 | pos->has_build_id = true; | |
505 | } | |
506 | } | |
507 | ||
508 | return have_build_id; | |
509 | } | |
510 | ||
511 | void dsos__add(struct list_head *head, struct dso *dso) | |
512 | { | |
513 | list_add_tail(&dso->node, head); | |
514 | } | |
515 | ||
516 | struct dso *dsos__find(struct list_head *head, const char *name) | |
517 | { | |
518 | struct dso *pos; | |
519 | ||
520 | list_for_each_entry(pos, head, node) | |
521 | if (strcmp(pos->long_name, name) == 0) | |
522 | return pos; | |
523 | return NULL; | |
524 | } | |
525 | ||
526 | struct dso *__dsos__findnew(struct list_head *head, const char *name) | |
527 | { | |
528 | struct dso *dso = dsos__find(head, name); | |
529 | ||
530 | if (!dso) { | |
531 | dso = dso__new(name); | |
532 | if (dso != NULL) { | |
533 | dsos__add(head, dso); | |
534 | dso__set_basename(dso); | |
535 | } | |
536 | } | |
537 | ||
538 | return dso; | |
539 | } | |
540 | ||
541 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, | |
542 | bool with_hits) | |
543 | { | |
544 | struct dso *pos; | |
545 | size_t ret = 0; | |
546 | ||
547 | list_for_each_entry(pos, head, node) { | |
548 | if (with_hits && !pos->hit) | |
549 | continue; | |
550 | ret += dso__fprintf_buildid(pos, fp); | |
551 | ret += fprintf(fp, " %s\n", pos->long_name); | |
552 | } | |
553 | return ret; | |
554 | } | |
555 | ||
556 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
557 | { | |
558 | struct dso *pos; | |
559 | size_t ret = 0; | |
560 | ||
561 | list_for_each_entry(pos, head, node) { | |
562 | int i; | |
563 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
564 | ret += dso__fprintf(pos, i, fp); | |
565 | } | |
566 | ||
567 | return ret; | |
568 | } | |
569 | ||
570 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
571 | { | |
572 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
573 | ||
574 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
575 | return fprintf(fp, "%s", sbuild_id); | |
576 | } | |
577 | ||
578 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) | |
579 | { | |
580 | struct rb_node *nd; | |
581 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
582 | ||
583 | if (dso->short_name != dso->long_name) | |
584 | ret += fprintf(fp, "%s, ", dso->long_name); | |
585 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
586 | dso->loaded ? "" : "NOT "); | |
587 | ret += dso__fprintf_buildid(dso, fp); | |
588 | ret += fprintf(fp, ")\n"); | |
589 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { | |
590 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
591 | ret += symbol__fprintf(pos, fp); | |
592 | } | |
593 | ||
594 | return ret; | |
595 | } |