Commit | Line | Data |
---|---|---|
a2928c42 ACM |
1 | #include "util.h" |
2 | #include "../perf.h" | |
4aa65636 | 3 | #include "session.h" |
655000e7 | 4 | #include "sort.h" |
a0055ae2 | 5 | #include "string.h" |
a2928c42 | 6 | #include "symbol.h" |
439d473b | 7 | #include "thread.h" |
a2928c42 | 8 | |
8f28827a FW |
9 | #include "debug.h" |
10 | ||
b32d133a | 11 | #include <asm/bug.h> |
a2928c42 ACM |
12 | #include <libelf.h> |
13 | #include <gelf.h> | |
14 | #include <elf.h> | |
f1617b40 | 15 | #include <limits.h> |
439d473b | 16 | #include <sys/utsname.h> |
2cdbc46d | 17 | |
c12e15e7 ACM |
18 | #ifndef NT_GNU_BUILD_ID |
19 | #define NT_GNU_BUILD_ID 3 | |
20 | #endif | |
21 | ||
94cb9e38 ACM |
22 | enum dso_origin { |
23 | DSO__ORIG_KERNEL = 0, | |
24 | DSO__ORIG_JAVA_JIT, | |
25 | DSO__ORIG_FEDORA, | |
26 | DSO__ORIG_UBUNTU, | |
27 | DSO__ORIG_BUILDID, | |
28 | DSO__ORIG_DSO, | |
439d473b | 29 | DSO__ORIG_KMODULE, |
94cb9e38 ACM |
30 | DSO__ORIG_NOT_FOUND, |
31 | }; | |
32 | ||
b0da954a | 33 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 34 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
c338aee8 | 35 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
4aa65636 | 36 | struct perf_session *session, symbol_filter_t filter); |
cc612d81 ACM |
37 | static int vmlinux_path__nr_entries; |
38 | static char **vmlinux_path; | |
439d473b | 39 | |
75be6cf4 | 40 | struct symbol_conf symbol_conf = { |
b32d133a ACM |
41 | .use_modules = true, |
42 | .try_vmlinux_path = true, | |
43 | }; | |
44 | ||
3610583c ACM |
45 | bool dso__loaded(const struct dso *self, enum map_type type) |
46 | { | |
47 | return self->loaded & (1 << type); | |
48 | } | |
49 | ||
79406cd7 ACM |
50 | bool dso__sorted_by_name(const struct dso *self, enum map_type type) |
51 | { | |
52 | return self->sorted_by_name & (1 << type); | |
53 | } | |
54 | ||
3610583c ACM |
55 | static void dso__set_loaded(struct dso *self, enum map_type type) |
56 | { | |
57 | self->loaded |= (1 << type); | |
58 | } | |
59 | ||
79406cd7 ACM |
60 | static void dso__set_sorted_by_name(struct dso *self, enum map_type type) |
61 | { | |
62 | self->sorted_by_name |= (1 << type); | |
63 | } | |
64 | ||
6893d4ee ACM |
65 | static bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
66 | { | |
67 | switch (map_type) { | |
68 | case MAP__FUNCTION: | |
69 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 ACM |
70 | case MAP__VARIABLE: |
71 | return symbol_type == 'D' || symbol_type == 'd'; | |
6893d4ee ACM |
72 | default: |
73 | return false; | |
74 | } | |
75 | } | |
76 | ||
fcf1203a | 77 | static void symbols__fixup_end(struct rb_root *self) |
af427bf5 | 78 | { |
fcf1203a | 79 | struct rb_node *nd, *prevnd = rb_first(self); |
2e538c4a | 80 | struct symbol *curr, *prev; |
af427bf5 ACM |
81 | |
82 | if (prevnd == NULL) | |
83 | return; | |
84 | ||
2e538c4a ACM |
85 | curr = rb_entry(prevnd, struct symbol, rb_node); |
86 | ||
af427bf5 | 87 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
88 | prev = curr; |
89 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
90 | |
91 | if (prev->end == prev->start) | |
92 | prev->end = curr->start - 1; | |
af427bf5 | 93 | } |
2e538c4a ACM |
94 | |
95 | /* Last entry */ | |
96 | if (curr->end == curr->start) | |
97 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
98 | } |
99 | ||
9958e1f0 | 100 | static void __map_groups__fixup_end(struct map_groups *self, enum map_type type) |
af427bf5 ACM |
101 | { |
102 | struct map *prev, *curr; | |
95011c60 | 103 | struct rb_node *nd, *prevnd = rb_first(&self->maps[type]); |
af427bf5 ACM |
104 | |
105 | if (prevnd == NULL) | |
106 | return; | |
107 | ||
108 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
109 | |
110 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
111 | prev = curr; | |
112 | curr = rb_entry(nd, struct map, rb_node); | |
113 | prev->end = curr->start - 1; | |
2e538c4a | 114 | } |
90c83218 ACM |
115 | |
116 | /* | |
117 | * We still haven't the actual symbols, so guess the | |
118 | * last map final address. | |
119 | */ | |
120 | curr->end = ~0UL; | |
af427bf5 ACM |
121 | } |
122 | ||
9958e1f0 | 123 | static void map_groups__fixup_end(struct map_groups *self) |
23ea4a3f ACM |
124 | { |
125 | int i; | |
126 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
9958e1f0 | 127 | __map_groups__fixup_end(self, i); |
23ea4a3f ACM |
128 | } |
129 | ||
00a192b3 | 130 | static struct symbol *symbol__new(u64 start, u64 len, const char *name) |
a2928c42 | 131 | { |
0085c954 | 132 | size_t namelen = strlen(name) + 1; |
75be6cf4 | 133 | struct symbol *self = zalloc(symbol_conf.priv_size + |
36479484 ACM |
134 | sizeof(*self) + namelen); |
135 | if (self == NULL) | |
0b73da3f IM |
136 | return NULL; |
137 | ||
75be6cf4 ACM |
138 | if (symbol_conf.priv_size) |
139 | self = ((void *)self) + symbol_conf.priv_size; | |
36479484 | 140 | |
0b73da3f | 141 | self->start = start; |
6cfcc53e | 142 | self->end = len ? start + len - 1 : start; |
e4204992 | 143 | |
6beba7ad | 144 | pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 145 | |
0b73da3f | 146 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
147 | |
148 | return self; | |
149 | } | |
150 | ||
00a192b3 | 151 | static void symbol__delete(struct symbol *self) |
a2928c42 | 152 | { |
75be6cf4 | 153 | free(((void *)self) - symbol_conf.priv_size); |
a2928c42 ACM |
154 | } |
155 | ||
156 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
157 | { | |
439d473b | 158 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
159 | self->start, self->end, self->name); |
160 | } | |
161 | ||
cfc10d3b ACM |
162 | static void dso__set_long_name(struct dso *self, char *name) |
163 | { | |
ef6ae724 ACM |
164 | if (name == NULL) |
165 | return; | |
cfc10d3b ACM |
166 | self->long_name = name; |
167 | self->long_name_len = strlen(name); | |
168 | } | |
169 | ||
170 | static void dso__set_basename(struct dso *self) | |
171 | { | |
172 | self->short_name = basename(self->long_name); | |
173 | } | |
174 | ||
00a192b3 | 175 | struct dso *dso__new(const char *name) |
a2928c42 ACM |
176 | { |
177 | struct dso *self = malloc(sizeof(*self) + strlen(name) + 1); | |
178 | ||
179 | if (self != NULL) { | |
6a4694a4 | 180 | int i; |
a2928c42 | 181 | strcpy(self->name, name); |
cfc10d3b | 182 | dso__set_long_name(self, self->name); |
439d473b | 183 | self->short_name = self->name; |
6a4694a4 | 184 | for (i = 0; i < MAP__NR_TYPES; ++i) |
79406cd7 | 185 | self->symbols[i] = self->symbol_names[i] = RB_ROOT; |
52d422de | 186 | self->slen_calculated = 0; |
94cb9e38 | 187 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f | 188 | self->loaded = 0; |
79406cd7 | 189 | self->sorted_by_name = 0; |
8d06367f | 190 | self->has_build_id = 0; |
a2928c42 ACM |
191 | } |
192 | ||
193 | return self; | |
194 | } | |
195 | ||
fcf1203a | 196 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
197 | { |
198 | struct symbol *pos; | |
fcf1203a | 199 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
200 | |
201 | while (next) { | |
202 | pos = rb_entry(next, struct symbol, rb_node); | |
203 | next = rb_next(&pos->rb_node); | |
fcf1203a | 204 | rb_erase(&pos->rb_node, self); |
00a192b3 | 205 | symbol__delete(pos); |
a2928c42 ACM |
206 | } |
207 | } | |
208 | ||
209 | void dso__delete(struct dso *self) | |
210 | { | |
6a4694a4 ACM |
211 | int i; |
212 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
213 | symbols__delete(&self->symbols[i]); | |
439d473b ACM |
214 | if (self->long_name != self->name) |
215 | free(self->long_name); | |
a2928c42 ACM |
216 | free(self); |
217 | } | |
218 | ||
8d06367f ACM |
219 | void dso__set_build_id(struct dso *self, void *build_id) |
220 | { | |
221 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
222 | self->has_build_id = 1; | |
223 | } | |
224 | ||
fcf1203a | 225 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 226 | { |
fcf1203a | 227 | struct rb_node **p = &self->rb_node; |
a2928c42 | 228 | struct rb_node *parent = NULL; |
9cffa8d5 | 229 | const u64 ip = sym->start; |
a2928c42 ACM |
230 | struct symbol *s; |
231 | ||
232 | while (*p != NULL) { | |
233 | parent = *p; | |
234 | s = rb_entry(parent, struct symbol, rb_node); | |
235 | if (ip < s->start) | |
236 | p = &(*p)->rb_left; | |
237 | else | |
238 | p = &(*p)->rb_right; | |
239 | } | |
240 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 241 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
242 | } |
243 | ||
fcf1203a | 244 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
245 | { |
246 | struct rb_node *n; | |
247 | ||
248 | if (self == NULL) | |
249 | return NULL; | |
250 | ||
fcf1203a | 251 | n = self->rb_node; |
a2928c42 ACM |
252 | |
253 | while (n) { | |
254 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
255 | ||
256 | if (ip < s->start) | |
257 | n = n->rb_left; | |
258 | else if (ip > s->end) | |
259 | n = n->rb_right; | |
260 | else | |
261 | return s; | |
262 | } | |
263 | ||
264 | return NULL; | |
265 | } | |
266 | ||
79406cd7 ACM |
267 | struct symbol_name_rb_node { |
268 | struct rb_node rb_node; | |
269 | struct symbol sym; | |
270 | }; | |
271 | ||
272 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
273 | { | |
274 | struct rb_node **p = &self->rb_node; | |
275 | struct rb_node *parent = NULL; | |
276 | struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; | |
277 | ||
278 | while (*p != NULL) { | |
279 | parent = *p; | |
280 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
281 | if (strcmp(sym->name, s->sym.name) < 0) | |
282 | p = &(*p)->rb_left; | |
283 | else | |
284 | p = &(*p)->rb_right; | |
285 | } | |
286 | rb_link_node(&symn->rb_node, parent, p); | |
287 | rb_insert_color(&symn->rb_node, self); | |
288 | } | |
289 | ||
290 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
291 | { | |
292 | struct rb_node *nd; | |
293 | ||
294 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
295 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
296 | symbols__insert_by_name(self, pos); | |
297 | } | |
298 | } | |
299 | ||
300 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
301 | { | |
302 | struct rb_node *n; | |
303 | ||
304 | if (self == NULL) | |
305 | return NULL; | |
306 | ||
307 | n = self->rb_node; | |
308 | ||
309 | while (n) { | |
310 | struct symbol_name_rb_node *s; | |
311 | int cmp; | |
312 | ||
313 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
314 | cmp = strcmp(name, s->sym.name); | |
315 | ||
316 | if (cmp < 0) | |
317 | n = n->rb_left; | |
318 | else if (cmp > 0) | |
319 | n = n->rb_right; | |
320 | else | |
321 | return &s->sym; | |
322 | } | |
323 | ||
324 | return NULL; | |
325 | } | |
326 | ||
327 | struct symbol *dso__find_symbol(struct dso *self, | |
328 | enum map_type type, u64 addr) | |
fcf1203a | 329 | { |
6a4694a4 | 330 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
331 | } |
332 | ||
79406cd7 ACM |
333 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
334 | const char *name) | |
335 | { | |
336 | return symbols__find_by_name(&self->symbol_names[type], name); | |
337 | } | |
338 | ||
339 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
340 | { | |
341 | dso__set_sorted_by_name(self, type); | |
342 | return symbols__sort_by_name(&self->symbol_names[type], | |
343 | &self->symbols[type]); | |
344 | } | |
345 | ||
8d06367f | 346 | int build_id__sprintf(u8 *self, int len, char *bf) |
a2928c42 | 347 | { |
8d06367f ACM |
348 | char *bid = bf; |
349 | u8 *raw = self; | |
350 | int i; | |
a2928c42 | 351 | |
8d06367f ACM |
352 | for (i = 0; i < len; ++i) { |
353 | sprintf(bid, "%02x", *raw); | |
354 | ++raw; | |
355 | bid += 2; | |
356 | } | |
357 | ||
358 | return raw - self; | |
359 | } | |
360 | ||
9e03eb2d | 361 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
362 | { |
363 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
364 | |
365 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
366 | return fprintf(fp, "%s", sbuild_id); |
367 | } | |
368 | ||
95011c60 | 369 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
370 | { |
371 | struct rb_node *nd; | |
372 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
373 | ||
374 | ret += dso__fprintf_buildid(self, fp); | |
6a4694a4 | 375 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
376 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
377 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
378 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
379 | } |
380 | ||
381 | return ret; | |
382 | } | |
383 | ||
2e538c4a ACM |
384 | /* |
385 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
386 | * so that we can in the next step set the symbol ->end address and then | |
387 | * call kernel_maps__split_kallsyms. | |
388 | */ | |
4e06255f | 389 | static int dso__load_all_kallsyms(struct dso *self, struct map *map) |
a2928c42 | 390 | { |
a2928c42 ACM |
391 | char *line = NULL; |
392 | size_t n; | |
4e06255f | 393 | struct rb_root *root = &self->symbols[map->type]; |
a2928c42 ACM |
394 | FILE *file = fopen("/proc/kallsyms", "r"); |
395 | ||
396 | if (file == NULL) | |
397 | goto out_failure; | |
398 | ||
399 | while (!feof(file)) { | |
9cffa8d5 | 400 | u64 start; |
a2928c42 ACM |
401 | struct symbol *sym; |
402 | int line_len, len; | |
403 | char symbol_type; | |
2e538c4a | 404 | char *symbol_name; |
a2928c42 ACM |
405 | |
406 | line_len = getline(&line, &n, file); | |
407 | if (line_len < 0) | |
408 | break; | |
409 | ||
410 | if (!line) | |
411 | goto out_failure; | |
412 | ||
413 | line[--line_len] = '\0'; /* \n */ | |
414 | ||
a0055ae2 | 415 | len = hex2u64(line, &start); |
a2928c42 ACM |
416 | |
417 | len++; | |
418 | if (len + 2 >= line_len) | |
419 | continue; | |
420 | ||
421 | symbol_type = toupper(line[len]); | |
6893d4ee | 422 | if (!symbol_type__is_a(symbol_type, map->type)) |
a2928c42 | 423 | continue; |
af427bf5 ACM |
424 | |
425 | symbol_name = line + len + 2; | |
2e538c4a ACM |
426 | /* |
427 | * Will fix up the end later, when we have all symbols sorted. | |
428 | */ | |
00a192b3 | 429 | sym = symbol__new(start, 0, symbol_name); |
af427bf5 | 430 | |
2e538c4a ACM |
431 | if (sym == NULL) |
432 | goto out_delete_line; | |
82164161 ACM |
433 | /* |
434 | * We will pass the symbols to the filter later, in | |
4e06255f | 435 | * map__split_kallsyms, when we have split the maps per module |
82164161 | 436 | */ |
4e06255f | 437 | symbols__insert(root, sym); |
2e538c4a ACM |
438 | } |
439 | ||
440 | free(line); | |
441 | fclose(file); | |
442 | ||
443 | return 0; | |
444 | ||
445 | out_delete_line: | |
446 | free(line); | |
447 | out_failure: | |
448 | return -1; | |
449 | } | |
450 | ||
451 | /* | |
452 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
453 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
454 | * the original ELF section names vmlinux have. | |
455 | */ | |
9958e1f0 | 456 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
4aa65636 | 457 | struct perf_session *session, symbol_filter_t filter) |
2e538c4a | 458 | { |
4e06255f | 459 | struct map *curr_map = map; |
2e538c4a ACM |
460 | struct symbol *pos; |
461 | int count = 0; | |
4e06255f ACM |
462 | struct rb_root *root = &self->symbols[map->type]; |
463 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
464 | int kernel_range = 0; |
465 | ||
466 | while (next) { | |
467 | char *module; | |
468 | ||
469 | pos = rb_entry(next, struct symbol, rb_node); | |
470 | next = rb_next(&pos->rb_node); | |
471 | ||
472 | module = strchr(pos->name, '\t'); | |
473 | if (module) { | |
75be6cf4 | 474 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
475 | goto discard_symbol; |
476 | ||
2e538c4a ACM |
477 | *module++ = '\0'; |
478 | ||
4e06255f | 479 | if (strcmp(self->name, module)) { |
4aa65636 | 480 | curr_map = map_groups__find_by_name(&session->kmaps, map->type, module); |
4e06255f | 481 | if (curr_map == NULL) { |
95011c60 ACM |
482 | pr_debug("/proc/{kallsyms,modules} " |
483 | "inconsistency!\n"); | |
af427bf5 ACM |
484 | return -1; |
485 | } | |
486 | } | |
2e538c4a ACM |
487 | /* |
488 | * So that we look just like we get from .ko files, | |
489 | * i.e. not prelinked, relative to map->start. | |
490 | */ | |
4e06255f ACM |
491 | pos->start = curr_map->map_ip(curr_map, pos->start); |
492 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
493 | } else if (curr_map != map) { | |
2e538c4a ACM |
494 | char dso_name[PATH_MAX]; |
495 | struct dso *dso; | |
496 | ||
497 | snprintf(dso_name, sizeof(dso_name), "[kernel].%d", | |
498 | kernel_range++); | |
499 | ||
00a192b3 | 500 | dso = dso__new(dso_name); |
2e538c4a ACM |
501 | if (dso == NULL) |
502 | return -1; | |
503 | ||
4e06255f | 504 | curr_map = map__new2(pos->start, dso, map->type); |
2e538c4a ACM |
505 | if (map == NULL) { |
506 | dso__delete(dso); | |
507 | return -1; | |
508 | } | |
a2928c42 | 509 | |
4e06255f | 510 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
4aa65636 | 511 | map_groups__insert(&session->kmaps, curr_map); |
2e538c4a ACM |
512 | ++kernel_range; |
513 | } | |
a2928c42 | 514 | |
4e06255f | 515 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 516 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 517 | symbol__delete(pos); |
2e538c4a | 518 | } else { |
4e06255f ACM |
519 | if (curr_map != map) { |
520 | rb_erase(&pos->rb_node, root); | |
521 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 522 | } |
9974f496 MG |
523 | count++; |
524 | } | |
a2928c42 ACM |
525 | } |
526 | ||
9974f496 | 527 | return count; |
2e538c4a | 528 | } |
a2928c42 | 529 | |
2e538c4a | 530 | |
4e06255f | 531 | static int dso__load_kallsyms(struct dso *self, struct map *map, |
4aa65636 | 532 | struct perf_session *session, symbol_filter_t filter) |
2e538c4a | 533 | { |
4e06255f | 534 | if (dso__load_all_kallsyms(self, map) < 0) |
2e538c4a ACM |
535 | return -1; |
536 | ||
4e06255f ACM |
537 | symbols__fixup_end(&self->symbols[map->type]); |
538 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 539 | |
4aa65636 | 540 | return dso__split_kallsyms(self, map, session, filter); |
af427bf5 ACM |
541 | } |
542 | ||
439d473b | 543 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 544 | symbol_filter_t filter) |
80d496be PE |
545 | { |
546 | char *line = NULL; | |
547 | size_t n; | |
548 | FILE *file; | |
549 | int nr_syms = 0; | |
550 | ||
439d473b | 551 | file = fopen(self->long_name, "r"); |
80d496be PE |
552 | if (file == NULL) |
553 | goto out_failure; | |
554 | ||
555 | while (!feof(file)) { | |
9cffa8d5 | 556 | u64 start, size; |
80d496be PE |
557 | struct symbol *sym; |
558 | int line_len, len; | |
559 | ||
560 | line_len = getline(&line, &n, file); | |
561 | if (line_len < 0) | |
562 | break; | |
563 | ||
564 | if (!line) | |
565 | goto out_failure; | |
566 | ||
567 | line[--line_len] = '\0'; /* \n */ | |
568 | ||
569 | len = hex2u64(line, &start); | |
570 | ||
571 | len++; | |
572 | if (len + 2 >= line_len) | |
573 | continue; | |
574 | ||
575 | len += hex2u64(line + len, &size); | |
576 | ||
577 | len++; | |
578 | if (len + 2 >= line_len) | |
579 | continue; | |
580 | ||
00a192b3 | 581 | sym = symbol__new(start, size, line + len); |
80d496be PE |
582 | |
583 | if (sym == NULL) | |
584 | goto out_delete_line; | |
585 | ||
439d473b | 586 | if (filter && filter(map, sym)) |
00a192b3 | 587 | symbol__delete(sym); |
80d496be | 588 | else { |
6a4694a4 | 589 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
590 | nr_syms++; |
591 | } | |
592 | } | |
593 | ||
594 | free(line); | |
595 | fclose(file); | |
596 | ||
597 | return nr_syms; | |
598 | ||
599 | out_delete_line: | |
600 | free(line); | |
601 | out_failure: | |
602 | return -1; | |
603 | } | |
604 | ||
a2928c42 ACM |
605 | /** |
606 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
607 | * | |
608 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 609 | * @idx: uint32_t idx |
a2928c42 ACM |
610 | * @sym: GElf_Sym iterator |
611 | */ | |
83a0944f IM |
612 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
613 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
614 | idx < nr_syms; \ | |
615 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
616 | |
617 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
618 | { | |
619 | return GELF_ST_TYPE(sym->st_info); | |
620 | } | |
621 | ||
622 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
623 | { | |
624 | return elf_sym__type(sym) == STT_FUNC && | |
625 | sym->st_name != 0 && | |
81833130 | 626 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
627 | } |
628 | ||
f1dfa0b1 ACM |
629 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
630 | { | |
631 | return elf_sym__type(sym) == STT_OBJECT && | |
632 | sym->st_name != 0 && | |
633 | sym->st_shndx != SHN_UNDEF; | |
634 | } | |
635 | ||
6cfcc53e MG |
636 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
637 | { | |
638 | return elf_sym__type(sym) == STT_NOTYPE && | |
639 | sym->st_name != 0 && | |
640 | sym->st_shndx != SHN_UNDEF && | |
641 | sym->st_shndx != SHN_ABS; | |
642 | } | |
643 | ||
644 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
645 | const Elf_Data *secstrs) | |
646 | { | |
647 | return secstrs->d_buf + shdr->sh_name; | |
648 | } | |
649 | ||
650 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
651 | const Elf_Data *secstrs) | |
652 | { | |
653 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
654 | } | |
655 | ||
f1dfa0b1 ACM |
656 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
657 | const Elf_Data *secstrs) | |
658 | { | |
659 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
660 | } | |
661 | ||
a2928c42 ACM |
662 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
663 | const Elf_Data *symstrs) | |
664 | { | |
665 | return symstrs->d_buf + sym->st_name; | |
666 | } | |
667 | ||
668 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
669 | GElf_Shdr *shp, const char *name, | |
83a0944f | 670 | size_t *idx) |
a2928c42 ACM |
671 | { |
672 | Elf_Scn *sec = NULL; | |
673 | size_t cnt = 1; | |
674 | ||
675 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
676 | char *str; | |
677 | ||
678 | gelf_getshdr(sec, shp); | |
679 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
680 | if (!strcmp(name, str)) { | |
83a0944f IM |
681 | if (idx) |
682 | *idx = cnt; | |
a2928c42 ACM |
683 | break; |
684 | } | |
685 | ++cnt; | |
686 | } | |
687 | ||
688 | return sec; | |
689 | } | |
690 | ||
8ce998d6 ACM |
691 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
692 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
693 | idx < nr_entries; \ | |
694 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
695 | ||
696 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
697 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
698 | idx < nr_entries; \ | |
699 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
700 | ||
a25e46c4 ACM |
701 | /* |
702 | * We need to check if we have a .dynsym, so that we can handle the | |
703 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
704 | * .dynsym or .symtab). | |
705 | * And always look at the original dso, not at debuginfo packages, that | |
706 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
707 | */ | |
82164161 ACM |
708 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
709 | symbol_filter_t filter) | |
8ce998d6 ACM |
710 | { |
711 | uint32_t nr_rel_entries, idx; | |
712 | GElf_Sym sym; | |
9cffa8d5 | 713 | u64 plt_offset; |
8ce998d6 ACM |
714 | GElf_Shdr shdr_plt; |
715 | struct symbol *f; | |
a25e46c4 | 716 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 717 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
718 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
719 | size_t dynsym_idx; | |
720 | GElf_Ehdr ehdr; | |
8ce998d6 | 721 | char sympltname[1024]; |
a25e46c4 ACM |
722 | Elf *elf; |
723 | int nr = 0, symidx, fd, err = 0; | |
724 | ||
439d473b | 725 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
726 | if (fd < 0) |
727 | goto out; | |
728 | ||
84087126 | 729 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
730 | if (elf == NULL) |
731 | goto out_close; | |
732 | ||
733 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
734 | goto out_elf_end; | |
735 | ||
736 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
737 | ".dynsym", &dynsym_idx); | |
738 | if (scn_dynsym == NULL) | |
739 | goto out_elf_end; | |
8ce998d6 | 740 | |
a25e46c4 | 741 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
742 | ".rela.plt", NULL); |
743 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 744 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
745 | ".rel.plt", NULL); |
746 | if (scn_plt_rel == NULL) | |
a25e46c4 | 747 | goto out_elf_end; |
8ce998d6 ACM |
748 | } |
749 | ||
a25e46c4 ACM |
750 | err = -1; |
751 | ||
8ce998d6 | 752 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 753 | goto out_elf_end; |
8ce998d6 | 754 | |
a25e46c4 ACM |
755 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
756 | goto out_elf_end; | |
8ce998d6 ACM |
757 | |
758 | /* | |
83a0944f | 759 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
760 | * and the symbols in the .dynsym they refer to. |
761 | */ | |
762 | reldata = elf_getdata(scn_plt_rel, NULL); | |
763 | if (reldata == NULL) | |
a25e46c4 | 764 | goto out_elf_end; |
8ce998d6 ACM |
765 | |
766 | syms = elf_getdata(scn_dynsym, NULL); | |
767 | if (syms == NULL) | |
a25e46c4 | 768 | goto out_elf_end; |
8ce998d6 | 769 | |
a25e46c4 | 770 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 771 | if (scn_symstrs == NULL) |
a25e46c4 | 772 | goto out_elf_end; |
8ce998d6 ACM |
773 | |
774 | symstrs = elf_getdata(scn_symstrs, NULL); | |
775 | if (symstrs == NULL) | |
a25e46c4 | 776 | goto out_elf_end; |
8ce998d6 ACM |
777 | |
778 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
779 | plt_offset = shdr_plt.sh_offset; | |
780 | ||
781 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
782 | GElf_Rela pos_mem, *pos; | |
783 | ||
784 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
785 | nr_rel_entries) { | |
786 | symidx = GELF_R_SYM(pos->r_info); | |
787 | plt_offset += shdr_plt.sh_entsize; | |
788 | gelf_getsym(syms, symidx, &sym); | |
789 | snprintf(sympltname, sizeof(sympltname), | |
790 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
791 | ||
792 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 793 | sympltname); |
8ce998d6 | 794 | if (!f) |
a25e46c4 | 795 | goto out_elf_end; |
8ce998d6 | 796 | |
82164161 ACM |
797 | if (filter && filter(map, f)) |
798 | symbol__delete(f); | |
799 | else { | |
6a4694a4 | 800 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
801 | ++nr; |
802 | } | |
8ce998d6 ACM |
803 | } |
804 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
805 | GElf_Rel pos_mem, *pos; | |
806 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
807 | nr_rel_entries) { | |
808 | symidx = GELF_R_SYM(pos->r_info); | |
809 | plt_offset += shdr_plt.sh_entsize; | |
810 | gelf_getsym(syms, symidx, &sym); | |
811 | snprintf(sympltname, sizeof(sympltname), | |
812 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
813 | ||
814 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 815 | sympltname); |
8ce998d6 | 816 | if (!f) |
a25e46c4 | 817 | goto out_elf_end; |
8ce998d6 | 818 | |
82164161 ACM |
819 | if (filter && filter(map, f)) |
820 | symbol__delete(f); | |
821 | else { | |
6a4694a4 | 822 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
823 | ++nr; |
824 | } | |
8ce998d6 | 825 | } |
8ce998d6 ACM |
826 | } |
827 | ||
a25e46c4 ACM |
828 | err = 0; |
829 | out_elf_end: | |
830 | elf_end(elf); | |
831 | out_close: | |
832 | close(fd); | |
833 | ||
834 | if (err == 0) | |
835 | return nr; | |
836 | out: | |
6beba7ad ACM |
837 | pr_warning("%s: problems reading %s PLT info.\n", |
838 | __func__, self->long_name); | |
a25e46c4 | 839 | return 0; |
8ce998d6 ACM |
840 | } |
841 | ||
d45868d3 ACM |
842 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
843 | { | |
844 | switch (type) { | |
845 | case MAP__FUNCTION: | |
846 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
847 | case MAP__VARIABLE: |
848 | return elf_sym__is_object(self); | |
d45868d3 ACM |
849 | default: |
850 | return false; | |
851 | } | |
852 | } | |
853 | ||
854 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
855 | { | |
856 | switch (type) { | |
857 | case MAP__FUNCTION: | |
858 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
859 | case MAP__VARIABLE: |
860 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
861 | default: |
862 | return false; | |
863 | } | |
864 | } | |
865 | ||
95011c60 | 866 | static int dso__load_sym(struct dso *self, struct map *map, |
4aa65636 | 867 | struct perf_session *session, const char *name, int fd, |
95011c60 | 868 | symbol_filter_t filter, int kernel, int kmodule) |
a2928c42 | 869 | { |
2e538c4a ACM |
870 | struct map *curr_map = map; |
871 | struct dso *curr_dso = self; | |
872 | size_t dso_name_len = strlen(self->short_name); | |
6cfcc53e | 873 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
874 | uint32_t nr_syms; |
875 | int err = -1; | |
83a0944f | 876 | uint32_t idx; |
a2928c42 ACM |
877 | GElf_Ehdr ehdr; |
878 | GElf_Shdr shdr; | |
879 | Elf_Data *syms; | |
880 | GElf_Sym sym; | |
a25e46c4 | 881 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 882 | Elf *elf; |
439d473b | 883 | int nr = 0; |
a2928c42 | 884 | |
84087126 | 885 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 886 | if (elf == NULL) { |
6beba7ad | 887 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
888 | goto out_close; |
889 | } | |
890 | ||
891 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 892 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
893 | goto out_elf_end; |
894 | } | |
895 | ||
896 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 897 | if (sec == NULL) { |
a25e46c4 ACM |
898 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
899 | if (sec == NULL) | |
8ce998d6 | 900 | goto out_elf_end; |
8ce998d6 | 901 | } |
a2928c42 ACM |
902 | |
903 | syms = elf_getdata(sec, NULL); | |
904 | if (syms == NULL) | |
905 | goto out_elf_end; | |
906 | ||
907 | sec = elf_getscn(elf, shdr.sh_link); | |
908 | if (sec == NULL) | |
909 | goto out_elf_end; | |
910 | ||
911 | symstrs = elf_getdata(sec, NULL); | |
912 | if (symstrs == NULL) | |
913 | goto out_elf_end; | |
914 | ||
6cfcc53e MG |
915 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
916 | if (sec_strndx == NULL) | |
917 | goto out_elf_end; | |
918 | ||
919 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 920 | if (secstrs == NULL) |
6cfcc53e MG |
921 | goto out_elf_end; |
922 | ||
a2928c42 ACM |
923 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
924 | ||
e9fbc9dc | 925 | memset(&sym, 0, sizeof(sym)); |
d20ff6bd MG |
926 | if (!kernel) { |
927 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
928 | elf_section_by_name(elf, &ehdr, &shdr, |
929 | ".gnu.prelink_undo", | |
930 | NULL) != NULL); | |
d20ff6bd MG |
931 | } else self->adjust_symbols = 0; |
932 | ||
83a0944f | 933 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 934 | struct symbol *f; |
83a0944f | 935 | const char *elf_name; |
2e538c4a | 936 | char *demangled = NULL; |
6cfcc53e MG |
937 | int is_label = elf_sym__is_label(&sym); |
938 | const char *section_name; | |
a2928c42 | 939 | |
d45868d3 | 940 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
941 | continue; |
942 | ||
943 | sec = elf_getscn(elf, sym.st_shndx); | |
944 | if (!sec) | |
945 | goto out_elf_end; | |
946 | ||
947 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 948 | |
d45868d3 | 949 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
950 | continue; |
951 | ||
2e538c4a | 952 | elf_name = elf_sym__name(&sym, symstrs); |
6cfcc53e | 953 | section_name = elf_sec__name(&shdr, secstrs); |
0b73da3f | 954 | |
2e538c4a ACM |
955 | if (kernel || kmodule) { |
956 | char dso_name[PATH_MAX]; | |
957 | ||
958 | if (strcmp(section_name, | |
959 | curr_dso->short_name + dso_name_len) == 0) | |
960 | goto new_symbol; | |
961 | ||
962 | if (strcmp(section_name, ".text") == 0) { | |
963 | curr_map = map; | |
964 | curr_dso = self; | |
965 | goto new_symbol; | |
966 | } | |
967 | ||
968 | snprintf(dso_name, sizeof(dso_name), | |
969 | "%s%s", self->short_name, section_name); | |
970 | ||
4aa65636 | 971 | curr_map = map_groups__find_by_name(&session->kmaps, map->type, dso_name); |
2e538c4a ACM |
972 | if (curr_map == NULL) { |
973 | u64 start = sym.st_value; | |
974 | ||
975 | if (kmodule) | |
976 | start += map->start + shdr.sh_offset; | |
977 | ||
00a192b3 | 978 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
979 | if (curr_dso == NULL) |
980 | goto out_elf_end; | |
3610583c ACM |
981 | curr_map = map__new2(start, curr_dso, |
982 | MAP__FUNCTION); | |
2e538c4a ACM |
983 | if (curr_map == NULL) { |
984 | dso__delete(curr_dso); | |
985 | goto out_elf_end; | |
986 | } | |
ed52ce2e ACM |
987 | curr_map->map_ip = identity__map_ip; |
988 | curr_map->unmap_ip = identity__map_ip; | |
2e538c4a | 989 | curr_dso->origin = DSO__ORIG_KERNEL; |
4aa65636 | 990 | map_groups__insert(&session->kmaps, curr_map); |
b0da954a | 991 | dsos__add(&dsos__kernel, curr_dso); |
2e538c4a ACM |
992 | } else |
993 | curr_dso = curr_map->dso; | |
994 | ||
995 | goto new_symbol; | |
af427bf5 ACM |
996 | } |
997 | ||
2e538c4a | 998 | if (curr_dso->adjust_symbols) { |
6beba7ad ACM |
999 | pr_debug2("adjusting symbol: st_value: %Lx sh_addr: " |
1000 | "%Lx sh_offset: %Lx\n", (u64)sym.st_value, | |
1001 | (u64)shdr.sh_addr, (u64)shdr.sh_offset); | |
f5812a7a | 1002 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1003 | } |
28ac909b ACM |
1004 | /* |
1005 | * We need to figure out if the object was created from C++ sources | |
1006 | * DWARF DW_compile_unit has this, but we don't always have access | |
1007 | * to it... | |
1008 | */ | |
83a0944f | 1009 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1010 | if (demangled != NULL) |
83a0944f | 1011 | elf_name = demangled; |
2e538c4a | 1012 | new_symbol: |
00a192b3 | 1013 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 1014 | free(demangled); |
a2928c42 ACM |
1015 | if (!f) |
1016 | goto out_elf_end; | |
1017 | ||
2e538c4a | 1018 | if (filter && filter(curr_map, f)) |
00a192b3 | 1019 | symbol__delete(f); |
69ee69f6 | 1020 | else { |
6a4694a4 | 1021 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1022 | nr++; |
1023 | } | |
a2928c42 ACM |
1024 | } |
1025 | ||
2e538c4a ACM |
1026 | /* |
1027 | * For misannotated, zeroed, ASM function sizes. | |
1028 | */ | |
1029 | if (nr > 0) | |
6a4694a4 | 1030 | symbols__fixup_end(&self->symbols[map->type]); |
a2928c42 ACM |
1031 | err = nr; |
1032 | out_elf_end: | |
1033 | elf_end(elf); | |
1034 | out_close: | |
1035 | return err; | |
1036 | } | |
1037 | ||
78075caa ACM |
1038 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1039 | { | |
1040 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1041 | } | |
1042 | ||
b0da954a | 1043 | static bool __dsos__read_build_ids(struct list_head *head) |
57f395a7 | 1044 | { |
e30a3d12 | 1045 | bool have_build_id = false; |
57f395a7 FW |
1046 | struct dso *pos; |
1047 | ||
b0da954a | 1048 | list_for_each_entry(pos, head, node) |
e30a3d12 ACM |
1049 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1050 | sizeof(pos->build_id)) > 0) { | |
1051 | have_build_id = true; | |
1052 | pos->has_build_id = true; | |
1053 | } | |
57f395a7 | 1054 | |
e30a3d12 | 1055 | return have_build_id; |
57f395a7 FW |
1056 | } |
1057 | ||
b0da954a ACM |
1058 | bool dsos__read_build_ids(void) |
1059 | { | |
8b4825bf ACM |
1060 | bool kbuildids = __dsos__read_build_ids(&dsos__kernel), |
1061 | ubuildids = __dsos__read_build_ids(&dsos__user); | |
1062 | return kbuildids || ubuildids; | |
b0da954a ACM |
1063 | } |
1064 | ||
fd7a346e ACM |
1065 | /* |
1066 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1067 | */ | |
1068 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1069 | ||
2643ce11 | 1070 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 1071 | { |
2643ce11 | 1072 | int fd, err = -1; |
4d1e00a8 ACM |
1073 | GElf_Ehdr ehdr; |
1074 | GElf_Shdr shdr; | |
fd7a346e | 1075 | Elf_Data *data; |
4d1e00a8 | 1076 | Elf_Scn *sec; |
e57cfcda | 1077 | Elf_Kind ek; |
fd7a346e | 1078 | void *ptr; |
4d1e00a8 | 1079 | Elf *elf; |
4d1e00a8 | 1080 | |
2643ce11 ACM |
1081 | if (size < BUILD_ID_SIZE) |
1082 | goto out; | |
1083 | ||
1084 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
1085 | if (fd < 0) |
1086 | goto out; | |
1087 | ||
84087126 | 1088 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 1089 | if (elf == NULL) { |
8d06367f | 1090 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
1091 | goto out_close; |
1092 | } | |
1093 | ||
e57cfcda PE |
1094 | ek = elf_kind(elf); |
1095 | if (ek != ELF_K_ELF) | |
1096 | goto out_elf_end; | |
1097 | ||
4d1e00a8 | 1098 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1099 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
1100 | goto out_elf_end; |
1101 | } | |
1102 | ||
2643ce11 ACM |
1103 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1104 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1105 | if (sec == NULL) { |
1106 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1107 | ".notes", NULL); | |
1108 | if (sec == NULL) | |
1109 | goto out_elf_end; | |
1110 | } | |
4d1e00a8 | 1111 | |
fd7a346e ACM |
1112 | data = elf_getdata(sec, NULL); |
1113 | if (data == NULL) | |
4d1e00a8 | 1114 | goto out_elf_end; |
fd7a346e ACM |
1115 | |
1116 | ptr = data->d_buf; | |
1117 | while (ptr < (data->d_buf + data->d_size)) { | |
1118 | GElf_Nhdr *nhdr = ptr; | |
1119 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1120 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1121 | const char *name; | |
1122 | ||
1123 | ptr += sizeof(*nhdr); | |
1124 | name = ptr; | |
1125 | ptr += namesz; | |
1126 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1127 | nhdr->n_namesz == sizeof("GNU")) { | |
1128 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1129 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1130 | err = BUILD_ID_SIZE; | |
1131 | break; | |
1132 | } | |
1133 | } | |
1134 | ptr += descsz; | |
1135 | } | |
2643ce11 ACM |
1136 | out_elf_end: |
1137 | elf_end(elf); | |
1138 | out_close: | |
1139 | close(fd); | |
1140 | out: | |
1141 | return err; | |
1142 | } | |
1143 | ||
f1617b40 ACM |
1144 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1145 | { | |
1146 | int fd, err = -1; | |
1147 | ||
1148 | if (size < BUILD_ID_SIZE) | |
1149 | goto out; | |
1150 | ||
1151 | fd = open(filename, O_RDONLY); | |
1152 | if (fd < 0) | |
1153 | goto out; | |
1154 | ||
1155 | while (1) { | |
1156 | char bf[BUFSIZ]; | |
1157 | GElf_Nhdr nhdr; | |
1158 | int namesz, descsz; | |
1159 | ||
1160 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1161 | break; | |
1162 | ||
fd7a346e ACM |
1163 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1164 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1165 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1166 | nhdr.n_namesz == sizeof("GNU")) { | |
1167 | if (read(fd, bf, namesz) != namesz) | |
1168 | break; | |
1169 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1170 | if (read(fd, build_id, | |
1171 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1172 | err = 0; | |
1173 | break; | |
1174 | } | |
1175 | } else if (read(fd, bf, descsz) != descsz) | |
1176 | break; | |
1177 | } else { | |
1178 | int n = namesz + descsz; | |
1179 | if (read(fd, bf, n) != n) | |
1180 | break; | |
1181 | } | |
1182 | } | |
1183 | close(fd); | |
1184 | out: | |
1185 | return err; | |
1186 | } | |
1187 | ||
94cb9e38 ACM |
1188 | char dso__symtab_origin(const struct dso *self) |
1189 | { | |
1190 | static const char origin[] = { | |
1191 | [DSO__ORIG_KERNEL] = 'k', | |
1192 | [DSO__ORIG_JAVA_JIT] = 'j', | |
1193 | [DSO__ORIG_FEDORA] = 'f', | |
1194 | [DSO__ORIG_UBUNTU] = 'u', | |
1195 | [DSO__ORIG_BUILDID] = 'b', | |
1196 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1197 | [DSO__ORIG_KMODULE] = 'K', |
94cb9e38 ACM |
1198 | }; |
1199 | ||
1200 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1201 | return '!'; | |
1202 | return origin[self->origin]; | |
1203 | } | |
1204 | ||
4aa65636 ACM |
1205 | int dso__load(struct dso *self, struct map *map, struct perf_session *session, |
1206 | symbol_filter_t filter) | |
a2928c42 | 1207 | { |
4d1e00a8 | 1208 | int size = PATH_MAX; |
c338aee8 | 1209 | char *name; |
d3379ab9 | 1210 | u8 build_id[BUILD_ID_SIZE]; |
a2928c42 ACM |
1211 | int ret = -1; |
1212 | int fd; | |
1213 | ||
3610583c | 1214 | dso__set_loaded(self, map->type); |
66bd8424 | 1215 | |
c338aee8 | 1216 | if (self->kernel) |
4aa65636 | 1217 | return dso__load_kernel_sym(self, map, session, filter); |
c338aee8 ACM |
1218 | |
1219 | name = malloc(size); | |
a2928c42 ACM |
1220 | if (!name) |
1221 | return -1; | |
1222 | ||
30d7a77d | 1223 | self->adjust_symbols = 0; |
f5812a7a | 1224 | |
94cb9e38 | 1225 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1226 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1227 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1228 | DSO__ORIG_NOT_FOUND; | |
1229 | return ret; | |
1230 | } | |
1231 | ||
1232 | self->origin = DSO__ORIG_FEDORA - 1; | |
80d496be | 1233 | |
a2928c42 ACM |
1234 | more: |
1235 | do { | |
94cb9e38 ACM |
1236 | self->origin++; |
1237 | switch (self->origin) { | |
1238 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1239 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1240 | self->long_name); | |
a2928c42 | 1241 | break; |
94cb9e38 | 1242 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1243 | snprintf(name, size, "/usr/lib/debug%s", |
1244 | self->long_name); | |
a2928c42 | 1245 | break; |
94cb9e38 | 1246 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1247 | if (filename__read_build_id(self->long_name, build_id, |
1248 | sizeof(build_id))) { | |
1249 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
1250 | ||
1251 | build_id__sprintf(build_id, sizeof(build_id), | |
1252 | build_id_hex); | |
4d1e00a8 ACM |
1253 | snprintf(name, size, |
1254 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
d3379ab9 ACM |
1255 | build_id_hex, build_id_hex + 2); |
1256 | if (self->has_build_id) | |
1257 | goto compare_build_id; | |
1258 | break; | |
4d1e00a8 | 1259 | } |
94cb9e38 | 1260 | self->origin++; |
4d1e00a8 | 1261 | /* Fall thru */ |
94cb9e38 | 1262 | case DSO__ORIG_DSO: |
439d473b | 1263 | snprintf(name, size, "%s", self->long_name); |
a2928c42 ACM |
1264 | break; |
1265 | ||
1266 | default: | |
1267 | goto out; | |
1268 | } | |
a2928c42 | 1269 | |
8d06367f | 1270 | if (self->has_build_id) { |
d3379ab9 ACM |
1271 | if (filename__read_build_id(name, build_id, |
1272 | sizeof(build_id)) < 0) | |
8d06367f | 1273 | goto more; |
8d06367f | 1274 | compare_build_id: |
78075caa | 1275 | if (!dso__build_id_equal(self, build_id)) |
8d06367f ACM |
1276 | goto more; |
1277 | } | |
1278 | ||
a2928c42 ACM |
1279 | fd = open(name, O_RDONLY); |
1280 | } while (fd < 0); | |
1281 | ||
95011c60 | 1282 | ret = dso__load_sym(self, map, NULL, name, fd, filter, 0, 0); |
a2928c42 ACM |
1283 | close(fd); |
1284 | ||
1285 | /* | |
1286 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1287 | */ | |
1288 | if (!ret) | |
1289 | goto more; | |
1290 | ||
a25e46c4 | 1291 | if (ret > 0) { |
82164161 | 1292 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1293 | if (nr_plt > 0) |
1294 | ret += nr_plt; | |
1295 | } | |
a2928c42 ACM |
1296 | out: |
1297 | free(name); | |
1340e6bb ACM |
1298 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1299 | return 0; | |
a2928c42 ACM |
1300 | return ret; |
1301 | } | |
1302 | ||
79406cd7 ACM |
1303 | struct map *map_groups__find_by_name(struct map_groups *self, |
1304 | enum map_type type, const char *name) | |
439d473b ACM |
1305 | { |
1306 | struct rb_node *nd; | |
1307 | ||
79406cd7 | 1308 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1309 | struct map *map = rb_entry(nd, struct map, rb_node); |
1310 | ||
1311 | if (map->dso && strcmp(map->dso->name, name) == 0) | |
1312 | return map; | |
1313 | } | |
1314 | ||
1315 | return NULL; | |
1316 | } | |
1317 | ||
4aa65636 | 1318 | static int perf_session__set_modules_path_dir(struct perf_session *self, char *dirname) |
6cfcc53e | 1319 | { |
439d473b | 1320 | struct dirent *dent; |
439d473b | 1321 | DIR *dir = opendir(dirname); |
6cfcc53e | 1322 | |
439d473b | 1323 | if (!dir) { |
87f8ea4c | 1324 | pr_debug("%s: cannot open %s dir\n", __func__, dirname); |
439d473b ACM |
1325 | return -1; |
1326 | } | |
6cfcc53e | 1327 | |
439d473b ACM |
1328 | while ((dent = readdir(dir)) != NULL) { |
1329 | char path[PATH_MAX]; | |
1330 | ||
1331 | if (dent->d_type == DT_DIR) { | |
1332 | if (!strcmp(dent->d_name, ".") || | |
1333 | !strcmp(dent->d_name, "..")) | |
1334 | continue; | |
1335 | ||
1336 | snprintf(path, sizeof(path), "%s/%s", | |
1337 | dirname, dent->d_name); | |
4aa65636 | 1338 | if (perf_session__set_modules_path_dir(self, path) < 0) |
439d473b ACM |
1339 | goto failure; |
1340 | } else { | |
1341 | char *dot = strrchr(dent->d_name, '.'), | |
1342 | dso_name[PATH_MAX]; | |
1343 | struct map *map; | |
cfc10d3b | 1344 | char *long_name; |
439d473b ACM |
1345 | |
1346 | if (dot == NULL || strcmp(dot, ".ko")) | |
1347 | continue; | |
1348 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1349 | (int)(dot - dent->d_name), dent->d_name); | |
1350 | ||
a2a99e8e | 1351 | strxfrchar(dso_name, '-', '_'); |
4aa65636 | 1352 | map = map_groups__find_by_name(&self->kmaps, MAP__FUNCTION, dso_name); |
439d473b ACM |
1353 | if (map == NULL) |
1354 | continue; | |
1355 | ||
1356 | snprintf(path, sizeof(path), "%s/%s", | |
1357 | dirname, dent->d_name); | |
1358 | ||
cfc10d3b ACM |
1359 | long_name = strdup(path); |
1360 | if (long_name == NULL) | |
439d473b | 1361 | goto failure; |
cfc10d3b | 1362 | dso__set_long_name(map->dso, long_name); |
439d473b | 1363 | } |
439d473b | 1364 | } |
6cfcc53e | 1365 | |
c338aee8 | 1366 | return 0; |
439d473b ACM |
1367 | failure: |
1368 | closedir(dir); | |
1369 | return -1; | |
1370 | } | |
6cfcc53e | 1371 | |
4aa65636 | 1372 | static int perf_session__set_modules_path(struct perf_session *self) |
439d473b ACM |
1373 | { |
1374 | struct utsname uts; | |
1375 | char modules_path[PATH_MAX]; | |
6cfcc53e | 1376 | |
439d473b ACM |
1377 | if (uname(&uts) < 0) |
1378 | return -1; | |
6cfcc53e | 1379 | |
439d473b ACM |
1380 | snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", |
1381 | uts.release); | |
6cfcc53e | 1382 | |
4aa65636 | 1383 | return perf_session__set_modules_path_dir(self, modules_path); |
6cfcc53e MG |
1384 | } |
1385 | ||
439d473b ACM |
1386 | /* |
1387 | * Constructor variant for modules (where we know from /proc/modules where | |
1388 | * they are loaded) and for vmlinux, where only after we load all the | |
1389 | * symbols we'll know where it starts and ends. | |
1390 | */ | |
3610583c | 1391 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1392 | { |
439d473b | 1393 | struct map *self = malloc(sizeof(*self)); |
6cfcc53e | 1394 | |
439d473b | 1395 | if (self != NULL) { |
439d473b | 1396 | /* |
afb7b4f0 | 1397 | * ->end will be filled after we load all the symbols |
439d473b | 1398 | */ |
3610583c | 1399 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1400 | } |
afb7b4f0 | 1401 | |
439d473b ACM |
1402 | return self; |
1403 | } | |
1404 | ||
4aa65636 | 1405 | static int perf_session__create_module_maps(struct perf_session *self) |
439d473b ACM |
1406 | { |
1407 | char *line = NULL; | |
1408 | size_t n; | |
1409 | FILE *file = fopen("/proc/modules", "r"); | |
1410 | struct map *map; | |
6cfcc53e | 1411 | |
439d473b ACM |
1412 | if (file == NULL) |
1413 | return -1; | |
6cfcc53e | 1414 | |
439d473b ACM |
1415 | while (!feof(file)) { |
1416 | char name[PATH_MAX]; | |
1417 | u64 start; | |
1418 | struct dso *dso; | |
1419 | char *sep; | |
1420 | int line_len; | |
6cfcc53e | 1421 | |
439d473b ACM |
1422 | line_len = getline(&line, &n, file); |
1423 | if (line_len < 0) | |
1424 | break; | |
1425 | ||
1426 | if (!line) | |
1427 | goto out_failure; | |
1428 | ||
1429 | line[--line_len] = '\0'; /* \n */ | |
1430 | ||
1431 | sep = strrchr(line, 'x'); | |
1432 | if (sep == NULL) | |
1433 | continue; | |
1434 | ||
1435 | hex2u64(sep + 1, &start); | |
1436 | ||
1437 | sep = strchr(line, ' '); | |
1438 | if (sep == NULL) | |
1439 | continue; | |
1440 | ||
1441 | *sep = '\0'; | |
1442 | ||
1443 | snprintf(name, sizeof(name), "[%s]", line); | |
00a192b3 | 1444 | dso = dso__new(name); |
439d473b ACM |
1445 | |
1446 | if (dso == NULL) | |
1447 | goto out_delete_line; | |
1448 | ||
3610583c | 1449 | map = map__new2(start, dso, MAP__FUNCTION); |
439d473b ACM |
1450 | if (map == NULL) { |
1451 | dso__delete(dso); | |
1452 | goto out_delete_line; | |
6cfcc53e | 1453 | } |
439d473b | 1454 | |
f1617b40 ACM |
1455 | snprintf(name, sizeof(name), |
1456 | "/sys/module/%s/notes/.note.gnu.build-id", line); | |
1457 | if (sysfs__read_build_id(name, dso->build_id, | |
1458 | sizeof(dso->build_id)) == 0) | |
1459 | dso->has_build_id = true; | |
1460 | ||
439d473b | 1461 | dso->origin = DSO__ORIG_KMODULE; |
4aa65636 | 1462 | map_groups__insert(&self->kmaps, map); |
b0da954a | 1463 | dsos__add(&dsos__kernel, dso); |
6cfcc53e | 1464 | } |
439d473b ACM |
1465 | |
1466 | free(line); | |
1467 | fclose(file); | |
1468 | ||
4aa65636 | 1469 | return perf_session__set_modules_path(self); |
439d473b ACM |
1470 | |
1471 | out_delete_line: | |
1472 | free(line); | |
1473 | out_failure: | |
1474 | return -1; | |
6cfcc53e MG |
1475 | } |
1476 | ||
9958e1f0 | 1477 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
4aa65636 | 1478 | struct perf_session *session, |
6beba7ad | 1479 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1480 | { |
fbd733b8 | 1481 | int err = -1, fd; |
a2928c42 | 1482 | |
fbd733b8 ACM |
1483 | if (self->has_build_id) { |
1484 | u8 build_id[BUILD_ID_SIZE]; | |
1485 | ||
1486 | if (filename__read_build_id(vmlinux, build_id, | |
1487 | sizeof(build_id)) < 0) { | |
1488 | pr_debug("No build_id in %s, ignoring it\n", vmlinux); | |
1489 | return -1; | |
1490 | } | |
1491 | if (!dso__build_id_equal(self, build_id)) { | |
1492 | char expected_build_id[BUILD_ID_SIZE * 2 + 1], | |
1493 | vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; | |
1494 | ||
1495 | build_id__sprintf(self->build_id, | |
1496 | sizeof(self->build_id), | |
1497 | expected_build_id); | |
1498 | build_id__sprintf(build_id, sizeof(build_id), | |
1499 | vmlinux_build_id); | |
1500 | pr_debug("build_id in %s is %s while expected is %s, " | |
1501 | "ignoring it\n", vmlinux, vmlinux_build_id, | |
1502 | expected_build_id); | |
1503 | return -1; | |
1504 | } | |
1505 | } | |
66bd8424 | 1506 | |
fbd733b8 | 1507 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1508 | if (fd < 0) |
1509 | return -1; | |
1510 | ||
3610583c | 1511 | dso__set_loaded(self, map->type); |
4aa65636 | 1512 | err = dso__load_sym(self, map, session, self->long_name, fd, filter, 1, 0); |
a2928c42 ACM |
1513 | close(fd); |
1514 | ||
1515 | return err; | |
1516 | } | |
1517 | ||
c338aee8 | 1518 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
4aa65636 | 1519 | struct perf_session *session, symbol_filter_t filter) |
a827c875 | 1520 | { |
cc612d81 ACM |
1521 | int err; |
1522 | bool is_kallsyms; | |
1523 | ||
1524 | if (vmlinux_path != NULL) { | |
1525 | int i; | |
1526 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
1527 | vmlinux_path__nr_entries); | |
1528 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
4aa65636 | 1529 | err = dso__load_vmlinux(self, map, session, |
95011c60 | 1530 | vmlinux_path[i], filter); |
cc612d81 ACM |
1531 | if (err > 0) { |
1532 | pr_debug("Using %s for symbols\n", | |
1533 | vmlinux_path[i]); | |
1534 | dso__set_long_name(self, | |
1535 | strdup(vmlinux_path[i])); | |
1536 | goto out_fixup; | |
1537 | } | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | is_kallsyms = self->long_name[0] == '['; | |
1542 | if (is_kallsyms) | |
1543 | goto do_kallsyms; | |
439d473b | 1544 | |
4aa65636 | 1545 | err = dso__load_vmlinux(self, map, session, self->long_name, filter); |
ef6ae724 | 1546 | if (err <= 0) { |
cc612d81 ACM |
1547 | pr_info("The file %s cannot be used, " |
1548 | "trying to use /proc/kallsyms...", self->long_name); | |
cc612d81 | 1549 | do_kallsyms: |
4aa65636 | 1550 | err = dso__load_kallsyms(self, map, session, filter); |
cc612d81 | 1551 | if (err > 0 && !is_kallsyms) |
ef6ae724 ACM |
1552 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
1553 | } | |
439d473b ACM |
1554 | |
1555 | if (err > 0) { | |
cc612d81 | 1556 | out_fixup: |
6a4694a4 ACM |
1557 | map__fixup_start(map); |
1558 | map__fixup_end(map); | |
439d473b | 1559 | } |
94cb9e38 | 1560 | |
a827c875 ACM |
1561 | return err; |
1562 | } | |
1563 | ||
b0da954a ACM |
1564 | LIST_HEAD(dsos__user); |
1565 | LIST_HEAD(dsos__kernel); | |
cc612d81 | 1566 | struct dso *vdso; |
cd84c2ac | 1567 | |
b0da954a | 1568 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1569 | { |
b0da954a | 1570 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1571 | } |
1572 | ||
b0da954a | 1573 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1574 | { |
1575 | struct dso *pos; | |
1576 | ||
b0da954a | 1577 | list_for_each_entry(pos, head, node) |
cd84c2ac FW |
1578 | if (strcmp(pos->name, name) == 0) |
1579 | return pos; | |
1580 | return NULL; | |
1581 | } | |
1582 | ||
00a192b3 | 1583 | struct dso *dsos__findnew(const char *name) |
cd84c2ac | 1584 | { |
b0da954a | 1585 | struct dso *dso = dsos__find(&dsos__user, name); |
cd84c2ac | 1586 | |
e4204992 | 1587 | if (!dso) { |
00a192b3 | 1588 | dso = dso__new(name); |
cfc10d3b | 1589 | if (dso != NULL) { |
b0da954a | 1590 | dsos__add(&dsos__user, dso); |
cfc10d3b ACM |
1591 | dso__set_basename(dso); |
1592 | } | |
66bd8424 | 1593 | } |
cd84c2ac FW |
1594 | |
1595 | return dso; | |
cd84c2ac FW |
1596 | } |
1597 | ||
b0da954a | 1598 | static void __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1599 | { |
1600 | struct dso *pos; | |
1601 | ||
95011c60 ACM |
1602 | list_for_each_entry(pos, head, node) { |
1603 | int i; | |
1604 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
1605 | dso__fprintf(pos, i, fp); | |
1606 | } | |
cd84c2ac FW |
1607 | } |
1608 | ||
b0da954a ACM |
1609 | void dsos__fprintf(FILE *fp) |
1610 | { | |
1611 | __dsos__fprintf(&dsos__kernel, fp); | |
1612 | __dsos__fprintf(&dsos__user, fp); | |
1613 | } | |
1614 | ||
1615 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp) | |
9e03eb2d ACM |
1616 | { |
1617 | struct dso *pos; | |
1618 | size_t ret = 0; | |
1619 | ||
b0da954a | 1620 | list_for_each_entry(pos, head, node) { |
9e03eb2d | 1621 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1622 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1623 | } |
1624 | return ret; | |
1625 | } | |
1626 | ||
b0da954a ACM |
1627 | size_t dsos__fprintf_buildid(FILE *fp) |
1628 | { | |
1629 | return (__dsos__fprintf_buildid(&dsos__kernel, fp) + | |
1630 | __dsos__fprintf_buildid(&dsos__user, fp)); | |
1631 | } | |
1632 | ||
f1dfa0b1 | 1633 | static struct dso *dsos__create_kernel( const char *vmlinux) |
cd84c2ac | 1634 | { |
95011c60 | 1635 | struct dso *kernel = dso__new(vmlinux ?: "[kernel.kallsyms]"); |
cd84c2ac | 1636 | |
2446042c | 1637 | if (kernel == NULL) |
f1dfa0b1 | 1638 | return NULL; |
c338aee8 | 1639 | |
4e06255f ACM |
1640 | kernel->short_name = "[kernel]"; |
1641 | kernel->kernel = 1; | |
2446042c | 1642 | |
00a192b3 | 1643 | vdso = dso__new("[vdso]"); |
c338aee8 | 1644 | if (vdso == NULL) |
f1dfa0b1 | 1645 | goto out_delete_kernel_dso; |
3610583c | 1646 | dso__set_loaded(vdso, MAP__FUNCTION); |
2446042c ACM |
1647 | |
1648 | if (sysfs__read_build_id("/sys/kernel/notes", kernel->build_id, | |
1649 | sizeof(kernel->build_id)) == 0) | |
1650 | kernel->has_build_id = true; | |
cd84c2ac | 1651 | |
b0da954a ACM |
1652 | dsos__add(&dsos__kernel, kernel); |
1653 | dsos__add(&dsos__user, vdso); | |
cd84c2ac | 1654 | |
f1dfa0b1 | 1655 | return kernel; |
c338aee8 | 1656 | |
c338aee8 ACM |
1657 | out_delete_kernel_dso: |
1658 | dso__delete(kernel); | |
f1dfa0b1 ACM |
1659 | return NULL; |
1660 | } | |
1661 | ||
1662 | static int map_groups__create_kernel_maps(struct map_groups *self, const char *vmlinux) | |
1663 | { | |
1664 | struct map *functions, *variables; | |
1665 | struct dso *kernel = dsos__create_kernel(vmlinux); | |
1666 | ||
1667 | if (kernel == NULL) | |
1668 | return -1; | |
1669 | ||
1670 | functions = map__new2(0, kernel, MAP__FUNCTION); | |
1671 | if (functions == NULL) | |
1672 | return -1; | |
1673 | ||
1674 | variables = map__new2(0, kernel, MAP__VARIABLE); | |
1675 | if (variables == NULL) { | |
1676 | map__delete(functions); | |
1677 | return -1; | |
1678 | } | |
1679 | ||
1680 | functions->map_ip = functions->unmap_ip = | |
1681 | variables->map_ip = variables->unmap_ip = identity__map_ip; | |
1682 | map_groups__insert(self, functions); | |
1683 | map_groups__insert(self, variables); | |
1684 | ||
1685 | return 0; | |
2446042c ACM |
1686 | } |
1687 | ||
cc612d81 ACM |
1688 | static void vmlinux_path__exit(void) |
1689 | { | |
1690 | while (--vmlinux_path__nr_entries >= 0) { | |
1691 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1692 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1693 | } | |
1694 | ||
1695 | free(vmlinux_path); | |
1696 | vmlinux_path = NULL; | |
1697 | } | |
1698 | ||
1699 | static int vmlinux_path__init(void) | |
1700 | { | |
1701 | struct utsname uts; | |
1702 | char bf[PATH_MAX]; | |
1703 | ||
1704 | if (uname(&uts) < 0) | |
1705 | return -1; | |
1706 | ||
1707 | vmlinux_path = malloc(sizeof(char *) * 5); | |
1708 | if (vmlinux_path == NULL) | |
1709 | return -1; | |
1710 | ||
1711 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1712 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1713 | goto out_fail; | |
1714 | ++vmlinux_path__nr_entries; | |
1715 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1716 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1717 | goto out_fail; | |
1718 | ++vmlinux_path__nr_entries; | |
1719 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
1720 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1721 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1722 | goto out_fail; | |
1723 | ++vmlinux_path__nr_entries; | |
1724 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1725 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1726 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1727 | goto out_fail; | |
1728 | ++vmlinux_path__nr_entries; | |
1729 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1730 | uts.release); | |
1731 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1732 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1733 | goto out_fail; | |
1734 | ++vmlinux_path__nr_entries; | |
1735 | ||
1736 | return 0; | |
1737 | ||
1738 | out_fail: | |
1739 | vmlinux_path__exit(); | |
1740 | return -1; | |
1741 | } | |
1742 | ||
655000e7 ACM |
1743 | static int setup_list(struct strlist **list, const char *list_str, |
1744 | const char *list_name) | |
1745 | { | |
1746 | if (list_str == NULL) | |
1747 | return 0; | |
1748 | ||
1749 | *list = strlist__new(true, list_str); | |
1750 | if (!*list) { | |
1751 | pr_err("problems parsing %s list\n", list_name); | |
1752 | return -1; | |
1753 | } | |
1754 | return 0; | |
1755 | } | |
1756 | ||
75be6cf4 | 1757 | int symbol__init(void) |
2446042c | 1758 | { |
95011c60 | 1759 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
1760 | if (symbol_conf.sort_by_name) |
1761 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1762 | sizeof(struct symbol)); | |
b32d133a | 1763 | |
75be6cf4 | 1764 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
1765 | return -1; |
1766 | ||
655000e7 ACM |
1767 | if (setup_list(&symbol_conf.dso_list, |
1768 | symbol_conf.dso_list_str, "dso") < 0) | |
1769 | return -1; | |
1770 | ||
1771 | if (setup_list(&symbol_conf.comm_list, | |
1772 | symbol_conf.comm_list_str, "comm") < 0) | |
1773 | goto out_free_dso_list; | |
1774 | ||
1775 | if (setup_list(&symbol_conf.sym_list, | |
1776 | symbol_conf.sym_list_str, "symbol") < 0) | |
1777 | goto out_free_comm_list; | |
1778 | ||
4aa65636 | 1779 | return 0; |
655000e7 ACM |
1780 | |
1781 | out_free_dso_list: | |
1782 | strlist__delete(symbol_conf.dso_list); | |
1783 | out_free_comm_list: | |
1784 | strlist__delete(symbol_conf.comm_list); | |
1785 | return -1; | |
4aa65636 ACM |
1786 | } |
1787 | ||
75be6cf4 | 1788 | int perf_session__create_kernel_maps(struct perf_session *self) |
4aa65636 | 1789 | { |
4aa65636 | 1790 | if (map_groups__create_kernel_maps(&self->kmaps, |
75be6cf4 | 1791 | symbol_conf.vmlinux_name) < 0) |
cc612d81 | 1792 | return -1; |
cc612d81 | 1793 | |
75be6cf4 ACM |
1794 | if (symbol_conf.use_modules && |
1795 | perf_session__create_module_maps(self) < 0) | |
4aa65636 ACM |
1796 | pr_debug("Failed to load list of modules for session %s, " |
1797 | "continuing...\n", self->filename); | |
90c83218 ACM |
1798 | /* |
1799 | * Now that we have all the maps created, just set the ->end of them: | |
1800 | */ | |
4aa65636 | 1801 | map_groups__fixup_end(&self->kmaps); |
6671cb16 | 1802 | return 0; |
cd84c2ac | 1803 | } |