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, | |
4cf40131 | 25 | DSO__ORIG_BUILD_ID_CACHE, |
94cb9e38 ACM |
26 | DSO__ORIG_FEDORA, |
27 | DSO__ORIG_UBUNTU, | |
28 | DSO__ORIG_BUILDID, | |
29 | DSO__ORIG_DSO, | |
439d473b | 30 | DSO__ORIG_KMODULE, |
94cb9e38 ACM |
31 | DSO__ORIG_NOT_FOUND, |
32 | }; | |
33 | ||
b0da954a | 34 | static void dsos__add(struct list_head *head, struct dso *dso); |
3610583c | 35 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type); |
c338aee8 | 36 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
4aa65636 | 37 | struct perf_session *session, symbol_filter_t filter); |
cc612d81 ACM |
38 | static int vmlinux_path__nr_entries; |
39 | static char **vmlinux_path; | |
439d473b | 40 | |
75be6cf4 | 41 | struct symbol_conf symbol_conf = { |
d599db3f | 42 | .exclude_other = true, |
b32d133a ACM |
43 | .use_modules = true, |
44 | .try_vmlinux_path = true, | |
45 | }; | |
46 | ||
3610583c ACM |
47 | bool dso__loaded(const struct dso *self, enum map_type type) |
48 | { | |
49 | return self->loaded & (1 << type); | |
50 | } | |
51 | ||
79406cd7 ACM |
52 | bool dso__sorted_by_name(const struct dso *self, enum map_type type) |
53 | { | |
54 | return self->sorted_by_name & (1 << type); | |
55 | } | |
56 | ||
3610583c ACM |
57 | static void dso__set_loaded(struct dso *self, enum map_type type) |
58 | { | |
59 | self->loaded |= (1 << type); | |
60 | } | |
61 | ||
79406cd7 ACM |
62 | static void dso__set_sorted_by_name(struct dso *self, enum map_type type) |
63 | { | |
64 | self->sorted_by_name |= (1 << type); | |
65 | } | |
66 | ||
36a3e646 | 67 | bool symbol_type__is_a(char symbol_type, enum map_type map_type) |
6893d4ee ACM |
68 | { |
69 | switch (map_type) { | |
70 | case MAP__FUNCTION: | |
71 | return symbol_type == 'T' || symbol_type == 'W'; | |
f1dfa0b1 ACM |
72 | case MAP__VARIABLE: |
73 | return symbol_type == 'D' || symbol_type == 'd'; | |
6893d4ee ACM |
74 | default: |
75 | return false; | |
76 | } | |
77 | } | |
78 | ||
fcf1203a | 79 | static void symbols__fixup_end(struct rb_root *self) |
af427bf5 | 80 | { |
fcf1203a | 81 | struct rb_node *nd, *prevnd = rb_first(self); |
2e538c4a | 82 | struct symbol *curr, *prev; |
af427bf5 ACM |
83 | |
84 | if (prevnd == NULL) | |
85 | return; | |
86 | ||
2e538c4a ACM |
87 | curr = rb_entry(prevnd, struct symbol, rb_node); |
88 | ||
af427bf5 | 89 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { |
2e538c4a ACM |
90 | prev = curr; |
91 | curr = rb_entry(nd, struct symbol, rb_node); | |
af427bf5 ACM |
92 | |
93 | if (prev->end == prev->start) | |
94 | prev->end = curr->start - 1; | |
af427bf5 | 95 | } |
2e538c4a ACM |
96 | |
97 | /* Last entry */ | |
98 | if (curr->end == curr->start) | |
99 | curr->end = roundup(curr->start, 4096); | |
af427bf5 ACM |
100 | } |
101 | ||
9958e1f0 | 102 | static void __map_groups__fixup_end(struct map_groups *self, enum map_type type) |
af427bf5 ACM |
103 | { |
104 | struct map *prev, *curr; | |
95011c60 | 105 | struct rb_node *nd, *prevnd = rb_first(&self->maps[type]); |
af427bf5 ACM |
106 | |
107 | if (prevnd == NULL) | |
108 | return; | |
109 | ||
110 | curr = rb_entry(prevnd, struct map, rb_node); | |
af427bf5 ACM |
111 | |
112 | for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) { | |
113 | prev = curr; | |
114 | curr = rb_entry(nd, struct map, rb_node); | |
115 | prev->end = curr->start - 1; | |
2e538c4a | 116 | } |
90c83218 ACM |
117 | |
118 | /* | |
119 | * We still haven't the actual symbols, so guess the | |
120 | * last map final address. | |
121 | */ | |
122 | curr->end = ~0UL; | |
af427bf5 ACM |
123 | } |
124 | ||
9958e1f0 | 125 | static void map_groups__fixup_end(struct map_groups *self) |
23ea4a3f ACM |
126 | { |
127 | int i; | |
128 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
9958e1f0 | 129 | __map_groups__fixup_end(self, i); |
23ea4a3f ACM |
130 | } |
131 | ||
00a192b3 | 132 | static struct symbol *symbol__new(u64 start, u64 len, const char *name) |
a2928c42 | 133 | { |
0085c954 | 134 | size_t namelen = strlen(name) + 1; |
75be6cf4 | 135 | struct symbol *self = zalloc(symbol_conf.priv_size + |
36479484 ACM |
136 | sizeof(*self) + namelen); |
137 | if (self == NULL) | |
0b73da3f IM |
138 | return NULL; |
139 | ||
75be6cf4 ACM |
140 | if (symbol_conf.priv_size) |
141 | self = ((void *)self) + symbol_conf.priv_size; | |
36479484 | 142 | |
0b73da3f | 143 | self->start = start; |
6cfcc53e | 144 | self->end = len ? start + len - 1 : start; |
e4204992 | 145 | |
6beba7ad | 146 | pr_debug3("%s: %s %#Lx-%#Lx\n", __func__, name, start, self->end); |
e4204992 | 147 | |
0b73da3f | 148 | memcpy(self->name, name, namelen); |
a2928c42 ACM |
149 | |
150 | return self; | |
151 | } | |
152 | ||
00a192b3 | 153 | static void symbol__delete(struct symbol *self) |
a2928c42 | 154 | { |
75be6cf4 | 155 | free(((void *)self) - symbol_conf.priv_size); |
a2928c42 ACM |
156 | } |
157 | ||
158 | static size_t symbol__fprintf(struct symbol *self, FILE *fp) | |
159 | { | |
439d473b | 160 | return fprintf(fp, " %llx-%llx %s\n", |
a2928c42 ACM |
161 | self->start, self->end, self->name); |
162 | } | |
163 | ||
cfc10d3b ACM |
164 | static void dso__set_long_name(struct dso *self, char *name) |
165 | { | |
ef6ae724 ACM |
166 | if (name == NULL) |
167 | return; | |
cfc10d3b ACM |
168 | self->long_name = name; |
169 | self->long_name_len = strlen(name); | |
170 | } | |
171 | ||
172 | static void dso__set_basename(struct dso *self) | |
173 | { | |
174 | self->short_name = basename(self->long_name); | |
175 | } | |
176 | ||
00a192b3 | 177 | struct dso *dso__new(const char *name) |
a2928c42 ACM |
178 | { |
179 | struct dso *self = malloc(sizeof(*self) + strlen(name) + 1); | |
180 | ||
181 | if (self != NULL) { | |
6a4694a4 | 182 | int i; |
a2928c42 | 183 | strcpy(self->name, name); |
cfc10d3b | 184 | dso__set_long_name(self, self->name); |
439d473b | 185 | self->short_name = self->name; |
6a4694a4 | 186 | for (i = 0; i < MAP__NR_TYPES; ++i) |
79406cd7 | 187 | self->symbols[i] = self->symbol_names[i] = RB_ROOT; |
52d422de | 188 | self->slen_calculated = 0; |
94cb9e38 | 189 | self->origin = DSO__ORIG_NOT_FOUND; |
8d06367f | 190 | self->loaded = 0; |
79406cd7 | 191 | self->sorted_by_name = 0; |
8d06367f | 192 | self->has_build_id = 0; |
a2928c42 ACM |
193 | } |
194 | ||
195 | return self; | |
196 | } | |
197 | ||
fcf1203a | 198 | static void symbols__delete(struct rb_root *self) |
a2928c42 ACM |
199 | { |
200 | struct symbol *pos; | |
fcf1203a | 201 | struct rb_node *next = rb_first(self); |
a2928c42 ACM |
202 | |
203 | while (next) { | |
204 | pos = rb_entry(next, struct symbol, rb_node); | |
205 | next = rb_next(&pos->rb_node); | |
fcf1203a | 206 | rb_erase(&pos->rb_node, self); |
00a192b3 | 207 | symbol__delete(pos); |
a2928c42 ACM |
208 | } |
209 | } | |
210 | ||
211 | void dso__delete(struct dso *self) | |
212 | { | |
6a4694a4 ACM |
213 | int i; |
214 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
215 | symbols__delete(&self->symbols[i]); | |
439d473b ACM |
216 | if (self->long_name != self->name) |
217 | free(self->long_name); | |
a2928c42 ACM |
218 | free(self); |
219 | } | |
220 | ||
8d06367f ACM |
221 | void dso__set_build_id(struct dso *self, void *build_id) |
222 | { | |
223 | memcpy(self->build_id, build_id, sizeof(self->build_id)); | |
224 | self->has_build_id = 1; | |
225 | } | |
226 | ||
fcf1203a | 227 | static void symbols__insert(struct rb_root *self, struct symbol *sym) |
a2928c42 | 228 | { |
fcf1203a | 229 | struct rb_node **p = &self->rb_node; |
a2928c42 | 230 | struct rb_node *parent = NULL; |
9cffa8d5 | 231 | const u64 ip = sym->start; |
a2928c42 ACM |
232 | struct symbol *s; |
233 | ||
234 | while (*p != NULL) { | |
235 | parent = *p; | |
236 | s = rb_entry(parent, struct symbol, rb_node); | |
237 | if (ip < s->start) | |
238 | p = &(*p)->rb_left; | |
239 | else | |
240 | p = &(*p)->rb_right; | |
241 | } | |
242 | rb_link_node(&sym->rb_node, parent, p); | |
fcf1203a | 243 | rb_insert_color(&sym->rb_node, self); |
a2928c42 ACM |
244 | } |
245 | ||
fcf1203a | 246 | static struct symbol *symbols__find(struct rb_root *self, u64 ip) |
a2928c42 ACM |
247 | { |
248 | struct rb_node *n; | |
249 | ||
250 | if (self == NULL) | |
251 | return NULL; | |
252 | ||
fcf1203a | 253 | n = self->rb_node; |
a2928c42 ACM |
254 | |
255 | while (n) { | |
256 | struct symbol *s = rb_entry(n, struct symbol, rb_node); | |
257 | ||
258 | if (ip < s->start) | |
259 | n = n->rb_left; | |
260 | else if (ip > s->end) | |
261 | n = n->rb_right; | |
262 | else | |
263 | return s; | |
264 | } | |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
79406cd7 ACM |
269 | struct symbol_name_rb_node { |
270 | struct rb_node rb_node; | |
271 | struct symbol sym; | |
272 | }; | |
273 | ||
274 | static void symbols__insert_by_name(struct rb_root *self, struct symbol *sym) | |
275 | { | |
276 | struct rb_node **p = &self->rb_node; | |
277 | struct rb_node *parent = NULL; | |
278 | struct symbol_name_rb_node *symn = ((void *)sym) - sizeof(*parent), *s; | |
279 | ||
280 | while (*p != NULL) { | |
281 | parent = *p; | |
282 | s = rb_entry(parent, struct symbol_name_rb_node, rb_node); | |
283 | if (strcmp(sym->name, s->sym.name) < 0) | |
284 | p = &(*p)->rb_left; | |
285 | else | |
286 | p = &(*p)->rb_right; | |
287 | } | |
288 | rb_link_node(&symn->rb_node, parent, p); | |
289 | rb_insert_color(&symn->rb_node, self); | |
290 | } | |
291 | ||
292 | static void symbols__sort_by_name(struct rb_root *self, struct rb_root *source) | |
293 | { | |
294 | struct rb_node *nd; | |
295 | ||
296 | for (nd = rb_first(source); nd; nd = rb_next(nd)) { | |
297 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
298 | symbols__insert_by_name(self, pos); | |
299 | } | |
300 | } | |
301 | ||
302 | static struct symbol *symbols__find_by_name(struct rb_root *self, const char *name) | |
303 | { | |
304 | struct rb_node *n; | |
305 | ||
306 | if (self == NULL) | |
307 | return NULL; | |
308 | ||
309 | n = self->rb_node; | |
310 | ||
311 | while (n) { | |
312 | struct symbol_name_rb_node *s; | |
313 | int cmp; | |
314 | ||
315 | s = rb_entry(n, struct symbol_name_rb_node, rb_node); | |
316 | cmp = strcmp(name, s->sym.name); | |
317 | ||
318 | if (cmp < 0) | |
319 | n = n->rb_left; | |
320 | else if (cmp > 0) | |
321 | n = n->rb_right; | |
322 | else | |
323 | return &s->sym; | |
324 | } | |
325 | ||
326 | return NULL; | |
327 | } | |
328 | ||
329 | struct symbol *dso__find_symbol(struct dso *self, | |
330 | enum map_type type, u64 addr) | |
fcf1203a | 331 | { |
6a4694a4 | 332 | return symbols__find(&self->symbols[type], addr); |
fcf1203a ACM |
333 | } |
334 | ||
79406cd7 ACM |
335 | struct symbol *dso__find_symbol_by_name(struct dso *self, enum map_type type, |
336 | const char *name) | |
337 | { | |
338 | return symbols__find_by_name(&self->symbol_names[type], name); | |
339 | } | |
340 | ||
341 | void dso__sort_by_name(struct dso *self, enum map_type type) | |
342 | { | |
343 | dso__set_sorted_by_name(self, type); | |
344 | return symbols__sort_by_name(&self->symbol_names[type], | |
345 | &self->symbols[type]); | |
346 | } | |
347 | ||
8d06367f | 348 | int build_id__sprintf(u8 *self, int len, char *bf) |
a2928c42 | 349 | { |
8d06367f ACM |
350 | char *bid = bf; |
351 | u8 *raw = self; | |
352 | int i; | |
a2928c42 | 353 | |
8d06367f ACM |
354 | for (i = 0; i < len; ++i) { |
355 | sprintf(bid, "%02x", *raw); | |
356 | ++raw; | |
357 | bid += 2; | |
358 | } | |
359 | ||
360 | return raw - self; | |
361 | } | |
362 | ||
9e03eb2d | 363 | size_t dso__fprintf_buildid(struct dso *self, FILE *fp) |
8d06367f ACM |
364 | { |
365 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
8d06367f ACM |
366 | |
367 | build_id__sprintf(self->build_id, sizeof(self->build_id), sbuild_id); | |
9e03eb2d ACM |
368 | return fprintf(fp, "%s", sbuild_id); |
369 | } | |
370 | ||
95011c60 | 371 | size_t dso__fprintf(struct dso *self, enum map_type type, FILE *fp) |
9e03eb2d ACM |
372 | { |
373 | struct rb_node *nd; | |
374 | size_t ret = fprintf(fp, "dso: %s (", self->short_name); | |
375 | ||
376 | ret += dso__fprintf_buildid(self, fp); | |
6a4694a4 | 377 | ret += fprintf(fp, ")\n"); |
95011c60 ACM |
378 | for (nd = rb_first(&self->symbols[type]); nd; nd = rb_next(nd)) { |
379 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
380 | ret += symbol__fprintf(pos, fp); | |
a2928c42 ACM |
381 | } |
382 | ||
383 | return ret; | |
384 | } | |
385 | ||
682b335a ACM |
386 | int kallsyms__parse(void *arg, int (*process_symbol)(void *arg, const char *name, |
387 | char type, u64 start)) | |
a2928c42 | 388 | { |
a2928c42 ACM |
389 | char *line = NULL; |
390 | size_t n; | |
682b335a | 391 | int err = 0; |
a2928c42 ACM |
392 | FILE *file = fopen("/proc/kallsyms", "r"); |
393 | ||
394 | if (file == NULL) | |
395 | goto out_failure; | |
396 | ||
397 | while (!feof(file)) { | |
9cffa8d5 | 398 | u64 start; |
a2928c42 ACM |
399 | int line_len, len; |
400 | char symbol_type; | |
2e538c4a | 401 | char *symbol_name; |
a2928c42 ACM |
402 | |
403 | line_len = getline(&line, &n, file); | |
404 | if (line_len < 0) | |
405 | break; | |
406 | ||
407 | if (!line) | |
408 | goto out_failure; | |
409 | ||
410 | line[--line_len] = '\0'; /* \n */ | |
411 | ||
a0055ae2 | 412 | len = hex2u64(line, &start); |
a2928c42 ACM |
413 | |
414 | len++; | |
415 | if (len + 2 >= line_len) | |
416 | continue; | |
417 | ||
418 | symbol_type = toupper(line[len]); | |
af427bf5 | 419 | symbol_name = line + len + 2; |
682b335a ACM |
420 | |
421 | err = process_symbol(arg, symbol_name, symbol_type, start); | |
422 | if (err) | |
423 | break; | |
2e538c4a ACM |
424 | } |
425 | ||
426 | free(line); | |
427 | fclose(file); | |
682b335a | 428 | return err; |
2e538c4a | 429 | |
2e538c4a ACM |
430 | out_failure: |
431 | return -1; | |
432 | } | |
433 | ||
682b335a ACM |
434 | struct process_kallsyms_args { |
435 | struct map *map; | |
436 | struct dso *dso; | |
437 | }; | |
438 | ||
439 | static int map__process_kallsym_symbol(void *arg, const char *name, | |
440 | char type, u64 start) | |
441 | { | |
442 | struct symbol *sym; | |
443 | struct process_kallsyms_args *a = arg; | |
444 | struct rb_root *root = &a->dso->symbols[a->map->type]; | |
445 | ||
446 | if (!symbol_type__is_a(type, a->map->type)) | |
447 | return 0; | |
448 | ||
449 | /* | |
450 | * Will fix up the end later, when we have all symbols sorted. | |
451 | */ | |
452 | sym = symbol__new(start, 0, name); | |
453 | ||
454 | if (sym == NULL) | |
455 | return -ENOMEM; | |
456 | /* | |
457 | * We will pass the symbols to the filter later, in | |
458 | * map__split_kallsyms, when we have split the maps per module | |
459 | */ | |
460 | symbols__insert(root, sym); | |
461 | return 0; | |
462 | } | |
463 | ||
464 | /* | |
465 | * Loads the function entries in /proc/kallsyms into kernel_map->dso, | |
466 | * so that we can in the next step set the symbol ->end address and then | |
467 | * call kernel_maps__split_kallsyms. | |
468 | */ | |
469 | static int dso__load_all_kallsyms(struct dso *self, struct map *map) | |
470 | { | |
471 | struct process_kallsyms_args args = { .map = map, .dso = self, }; | |
472 | return kallsyms__parse(&args, map__process_kallsym_symbol); | |
473 | } | |
474 | ||
2e538c4a ACM |
475 | /* |
476 | * Split the symbols into maps, making sure there are no overlaps, i.e. the | |
477 | * kernel range is broken in several maps, named [kernel].N, as we don't have | |
478 | * the original ELF section names vmlinux have. | |
479 | */ | |
9958e1f0 | 480 | static int dso__split_kallsyms(struct dso *self, struct map *map, |
4aa65636 | 481 | struct perf_session *session, symbol_filter_t filter) |
2e538c4a | 482 | { |
4e06255f | 483 | struct map *curr_map = map; |
2e538c4a ACM |
484 | struct symbol *pos; |
485 | int count = 0; | |
4e06255f ACM |
486 | struct rb_root *root = &self->symbols[map->type]; |
487 | struct rb_node *next = rb_first(root); | |
2e538c4a ACM |
488 | int kernel_range = 0; |
489 | ||
490 | while (next) { | |
491 | char *module; | |
492 | ||
493 | pos = rb_entry(next, struct symbol, rb_node); | |
494 | next = rb_next(&pos->rb_node); | |
495 | ||
496 | module = strchr(pos->name, '\t'); | |
497 | if (module) { | |
75be6cf4 | 498 | if (!symbol_conf.use_modules) |
1de8e245 ACM |
499 | goto discard_symbol; |
500 | ||
2e538c4a ACM |
501 | *module++ = '\0'; |
502 | ||
4e06255f | 503 | if (strcmp(self->name, module)) { |
4aa65636 | 504 | curr_map = map_groups__find_by_name(&session->kmaps, map->type, module); |
4e06255f | 505 | if (curr_map == NULL) { |
95011c60 ACM |
506 | pr_debug("/proc/{kallsyms,modules} " |
507 | "inconsistency!\n"); | |
af427bf5 ACM |
508 | return -1; |
509 | } | |
510 | } | |
2e538c4a ACM |
511 | /* |
512 | * So that we look just like we get from .ko files, | |
513 | * i.e. not prelinked, relative to map->start. | |
514 | */ | |
4e06255f ACM |
515 | pos->start = curr_map->map_ip(curr_map, pos->start); |
516 | pos->end = curr_map->map_ip(curr_map, pos->end); | |
517 | } else if (curr_map != map) { | |
2e538c4a ACM |
518 | char dso_name[PATH_MAX]; |
519 | struct dso *dso; | |
520 | ||
521 | snprintf(dso_name, sizeof(dso_name), "[kernel].%d", | |
522 | kernel_range++); | |
523 | ||
00a192b3 | 524 | dso = dso__new(dso_name); |
2e538c4a ACM |
525 | if (dso == NULL) |
526 | return -1; | |
527 | ||
4e06255f | 528 | curr_map = map__new2(pos->start, dso, map->type); |
2e538c4a ACM |
529 | if (map == NULL) { |
530 | dso__delete(dso); | |
531 | return -1; | |
532 | } | |
a2928c42 | 533 | |
4e06255f | 534 | curr_map->map_ip = curr_map->unmap_ip = identity__map_ip; |
4aa65636 | 535 | map_groups__insert(&session->kmaps, curr_map); |
2e538c4a ACM |
536 | ++kernel_range; |
537 | } | |
a2928c42 | 538 | |
4e06255f | 539 | if (filter && filter(curr_map, pos)) { |
1de8e245 | 540 | discard_symbol: rb_erase(&pos->rb_node, root); |
00a192b3 | 541 | symbol__delete(pos); |
2e538c4a | 542 | } else { |
4e06255f ACM |
543 | if (curr_map != map) { |
544 | rb_erase(&pos->rb_node, root); | |
545 | symbols__insert(&curr_map->dso->symbols[curr_map->type], pos); | |
2e538c4a | 546 | } |
9974f496 MG |
547 | count++; |
548 | } | |
a2928c42 ACM |
549 | } |
550 | ||
9974f496 | 551 | return count; |
2e538c4a | 552 | } |
a2928c42 | 553 | |
2e538c4a | 554 | |
4e06255f | 555 | static int dso__load_kallsyms(struct dso *self, struct map *map, |
4aa65636 | 556 | struct perf_session *session, symbol_filter_t filter) |
2e538c4a | 557 | { |
4e06255f | 558 | if (dso__load_all_kallsyms(self, map) < 0) |
2e538c4a ACM |
559 | return -1; |
560 | ||
4e06255f ACM |
561 | symbols__fixup_end(&self->symbols[map->type]); |
562 | self->origin = DSO__ORIG_KERNEL; | |
2e538c4a | 563 | |
4aa65636 | 564 | return dso__split_kallsyms(self, map, session, filter); |
af427bf5 ACM |
565 | } |
566 | ||
439d473b | 567 | static int dso__load_perf_map(struct dso *self, struct map *map, |
6beba7ad | 568 | symbol_filter_t filter) |
80d496be PE |
569 | { |
570 | char *line = NULL; | |
571 | size_t n; | |
572 | FILE *file; | |
573 | int nr_syms = 0; | |
574 | ||
439d473b | 575 | file = fopen(self->long_name, "r"); |
80d496be PE |
576 | if (file == NULL) |
577 | goto out_failure; | |
578 | ||
579 | while (!feof(file)) { | |
9cffa8d5 | 580 | u64 start, size; |
80d496be PE |
581 | struct symbol *sym; |
582 | int line_len, len; | |
583 | ||
584 | line_len = getline(&line, &n, file); | |
585 | if (line_len < 0) | |
586 | break; | |
587 | ||
588 | if (!line) | |
589 | goto out_failure; | |
590 | ||
591 | line[--line_len] = '\0'; /* \n */ | |
592 | ||
593 | len = hex2u64(line, &start); | |
594 | ||
595 | len++; | |
596 | if (len + 2 >= line_len) | |
597 | continue; | |
598 | ||
599 | len += hex2u64(line + len, &size); | |
600 | ||
601 | len++; | |
602 | if (len + 2 >= line_len) | |
603 | continue; | |
604 | ||
00a192b3 | 605 | sym = symbol__new(start, size, line + len); |
80d496be PE |
606 | |
607 | if (sym == NULL) | |
608 | goto out_delete_line; | |
609 | ||
439d473b | 610 | if (filter && filter(map, sym)) |
00a192b3 | 611 | symbol__delete(sym); |
80d496be | 612 | else { |
6a4694a4 | 613 | symbols__insert(&self->symbols[map->type], sym); |
80d496be PE |
614 | nr_syms++; |
615 | } | |
616 | } | |
617 | ||
618 | free(line); | |
619 | fclose(file); | |
620 | ||
621 | return nr_syms; | |
622 | ||
623 | out_delete_line: | |
624 | free(line); | |
625 | out_failure: | |
626 | return -1; | |
627 | } | |
628 | ||
a2928c42 ACM |
629 | /** |
630 | * elf_symtab__for_each_symbol - iterate thru all the symbols | |
631 | * | |
632 | * @self: struct elf_symtab instance to iterate | |
83a0944f | 633 | * @idx: uint32_t idx |
a2928c42 ACM |
634 | * @sym: GElf_Sym iterator |
635 | */ | |
83a0944f IM |
636 | #define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \ |
637 | for (idx = 0, gelf_getsym(syms, idx, &sym);\ | |
638 | idx < nr_syms; \ | |
639 | idx++, gelf_getsym(syms, idx, &sym)) | |
a2928c42 ACM |
640 | |
641 | static inline uint8_t elf_sym__type(const GElf_Sym *sym) | |
642 | { | |
643 | return GELF_ST_TYPE(sym->st_info); | |
644 | } | |
645 | ||
646 | static inline int elf_sym__is_function(const GElf_Sym *sym) | |
647 | { | |
648 | return elf_sym__type(sym) == STT_FUNC && | |
649 | sym->st_name != 0 && | |
81833130 | 650 | sym->st_shndx != SHN_UNDEF; |
a2928c42 ACM |
651 | } |
652 | ||
f1dfa0b1 ACM |
653 | static inline bool elf_sym__is_object(const GElf_Sym *sym) |
654 | { | |
655 | return elf_sym__type(sym) == STT_OBJECT && | |
656 | sym->st_name != 0 && | |
657 | sym->st_shndx != SHN_UNDEF; | |
658 | } | |
659 | ||
6cfcc53e MG |
660 | static inline int elf_sym__is_label(const GElf_Sym *sym) |
661 | { | |
662 | return elf_sym__type(sym) == STT_NOTYPE && | |
663 | sym->st_name != 0 && | |
664 | sym->st_shndx != SHN_UNDEF && | |
665 | sym->st_shndx != SHN_ABS; | |
666 | } | |
667 | ||
668 | static inline const char *elf_sec__name(const GElf_Shdr *shdr, | |
669 | const Elf_Data *secstrs) | |
670 | { | |
671 | return secstrs->d_buf + shdr->sh_name; | |
672 | } | |
673 | ||
674 | static inline int elf_sec__is_text(const GElf_Shdr *shdr, | |
675 | const Elf_Data *secstrs) | |
676 | { | |
677 | return strstr(elf_sec__name(shdr, secstrs), "text") != NULL; | |
678 | } | |
679 | ||
f1dfa0b1 ACM |
680 | static inline bool elf_sec__is_data(const GElf_Shdr *shdr, |
681 | const Elf_Data *secstrs) | |
682 | { | |
683 | return strstr(elf_sec__name(shdr, secstrs), "data") != NULL; | |
684 | } | |
685 | ||
a2928c42 ACM |
686 | static inline const char *elf_sym__name(const GElf_Sym *sym, |
687 | const Elf_Data *symstrs) | |
688 | { | |
689 | return symstrs->d_buf + sym->st_name; | |
690 | } | |
691 | ||
692 | static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, | |
693 | GElf_Shdr *shp, const char *name, | |
83a0944f | 694 | size_t *idx) |
a2928c42 ACM |
695 | { |
696 | Elf_Scn *sec = NULL; | |
697 | size_t cnt = 1; | |
698 | ||
699 | while ((sec = elf_nextscn(elf, sec)) != NULL) { | |
700 | char *str; | |
701 | ||
702 | gelf_getshdr(sec, shp); | |
703 | str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); | |
704 | if (!strcmp(name, str)) { | |
83a0944f IM |
705 | if (idx) |
706 | *idx = cnt; | |
a2928c42 ACM |
707 | break; |
708 | } | |
709 | ++cnt; | |
710 | } | |
711 | ||
712 | return sec; | |
713 | } | |
714 | ||
8ce998d6 ACM |
715 | #define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \ |
716 | for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \ | |
717 | idx < nr_entries; \ | |
718 | ++idx, pos = gelf_getrel(reldata, idx, &pos_mem)) | |
719 | ||
720 | #define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \ | |
721 | for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \ | |
722 | idx < nr_entries; \ | |
723 | ++idx, pos = gelf_getrela(reldata, idx, &pos_mem)) | |
724 | ||
a25e46c4 ACM |
725 | /* |
726 | * We need to check if we have a .dynsym, so that we can handle the | |
727 | * .plt, synthesizing its symbols, that aren't on the symtabs (be it | |
728 | * .dynsym or .symtab). | |
729 | * And always look at the original dso, not at debuginfo packages, that | |
730 | * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS). | |
731 | */ | |
82164161 ACM |
732 | static int dso__synthesize_plt_symbols(struct dso *self, struct map *map, |
733 | symbol_filter_t filter) | |
8ce998d6 ACM |
734 | { |
735 | uint32_t nr_rel_entries, idx; | |
736 | GElf_Sym sym; | |
9cffa8d5 | 737 | u64 plt_offset; |
8ce998d6 ACM |
738 | GElf_Shdr shdr_plt; |
739 | struct symbol *f; | |
a25e46c4 | 740 | GElf_Shdr shdr_rel_plt, shdr_dynsym; |
8ce998d6 | 741 | Elf_Data *reldata, *syms, *symstrs; |
a25e46c4 ACM |
742 | Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym; |
743 | size_t dynsym_idx; | |
744 | GElf_Ehdr ehdr; | |
8ce998d6 | 745 | char sympltname[1024]; |
a25e46c4 ACM |
746 | Elf *elf; |
747 | int nr = 0, symidx, fd, err = 0; | |
748 | ||
439d473b | 749 | fd = open(self->long_name, O_RDONLY); |
a25e46c4 ACM |
750 | if (fd < 0) |
751 | goto out; | |
752 | ||
84087126 | 753 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a25e46c4 ACM |
754 | if (elf == NULL) |
755 | goto out_close; | |
756 | ||
757 | if (gelf_getehdr(elf, &ehdr) == NULL) | |
758 | goto out_elf_end; | |
759 | ||
760 | scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym, | |
761 | ".dynsym", &dynsym_idx); | |
762 | if (scn_dynsym == NULL) | |
763 | goto out_elf_end; | |
8ce998d6 | 764 | |
a25e46c4 | 765 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
766 | ".rela.plt", NULL); |
767 | if (scn_plt_rel == NULL) { | |
a25e46c4 | 768 | scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt, |
8ce998d6 ACM |
769 | ".rel.plt", NULL); |
770 | if (scn_plt_rel == NULL) | |
a25e46c4 | 771 | goto out_elf_end; |
8ce998d6 ACM |
772 | } |
773 | ||
a25e46c4 ACM |
774 | err = -1; |
775 | ||
8ce998d6 | 776 | if (shdr_rel_plt.sh_link != dynsym_idx) |
a25e46c4 | 777 | goto out_elf_end; |
8ce998d6 | 778 | |
a25e46c4 ACM |
779 | if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL) |
780 | goto out_elf_end; | |
8ce998d6 ACM |
781 | |
782 | /* | |
83a0944f | 783 | * Fetch the relocation section to find the idxes to the GOT |
8ce998d6 ACM |
784 | * and the symbols in the .dynsym they refer to. |
785 | */ | |
786 | reldata = elf_getdata(scn_plt_rel, NULL); | |
787 | if (reldata == NULL) | |
a25e46c4 | 788 | goto out_elf_end; |
8ce998d6 ACM |
789 | |
790 | syms = elf_getdata(scn_dynsym, NULL); | |
791 | if (syms == NULL) | |
a25e46c4 | 792 | goto out_elf_end; |
8ce998d6 | 793 | |
a25e46c4 | 794 | scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link); |
8ce998d6 | 795 | if (scn_symstrs == NULL) |
a25e46c4 | 796 | goto out_elf_end; |
8ce998d6 ACM |
797 | |
798 | symstrs = elf_getdata(scn_symstrs, NULL); | |
799 | if (symstrs == NULL) | |
a25e46c4 | 800 | goto out_elf_end; |
8ce998d6 ACM |
801 | |
802 | nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize; | |
803 | plt_offset = shdr_plt.sh_offset; | |
804 | ||
805 | if (shdr_rel_plt.sh_type == SHT_RELA) { | |
806 | GElf_Rela pos_mem, *pos; | |
807 | ||
808 | elf_section__for_each_rela(reldata, pos, pos_mem, idx, | |
809 | nr_rel_entries) { | |
810 | symidx = GELF_R_SYM(pos->r_info); | |
811 | plt_offset += shdr_plt.sh_entsize; | |
812 | gelf_getsym(syms, symidx, &sym); | |
813 | snprintf(sympltname, sizeof(sympltname), | |
814 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
815 | ||
816 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 817 | sympltname); |
8ce998d6 | 818 | if (!f) |
a25e46c4 | 819 | goto out_elf_end; |
8ce998d6 | 820 | |
82164161 ACM |
821 | if (filter && filter(map, f)) |
822 | symbol__delete(f); | |
823 | else { | |
6a4694a4 | 824 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
825 | ++nr; |
826 | } | |
8ce998d6 ACM |
827 | } |
828 | } else if (shdr_rel_plt.sh_type == SHT_REL) { | |
829 | GElf_Rel pos_mem, *pos; | |
830 | elf_section__for_each_rel(reldata, pos, pos_mem, idx, | |
831 | nr_rel_entries) { | |
832 | symidx = GELF_R_SYM(pos->r_info); | |
833 | plt_offset += shdr_plt.sh_entsize; | |
834 | gelf_getsym(syms, symidx, &sym); | |
835 | snprintf(sympltname, sizeof(sympltname), | |
836 | "%s@plt", elf_sym__name(&sym, symstrs)); | |
837 | ||
838 | f = symbol__new(plt_offset, shdr_plt.sh_entsize, | |
00a192b3 | 839 | sympltname); |
8ce998d6 | 840 | if (!f) |
a25e46c4 | 841 | goto out_elf_end; |
8ce998d6 | 842 | |
82164161 ACM |
843 | if (filter && filter(map, f)) |
844 | symbol__delete(f); | |
845 | else { | |
6a4694a4 | 846 | symbols__insert(&self->symbols[map->type], f); |
82164161 ACM |
847 | ++nr; |
848 | } | |
8ce998d6 | 849 | } |
8ce998d6 ACM |
850 | } |
851 | ||
a25e46c4 ACM |
852 | err = 0; |
853 | out_elf_end: | |
854 | elf_end(elf); | |
855 | out_close: | |
856 | close(fd); | |
857 | ||
858 | if (err == 0) | |
859 | return nr; | |
860 | out: | |
6beba7ad ACM |
861 | pr_warning("%s: problems reading %s PLT info.\n", |
862 | __func__, self->long_name); | |
a25e46c4 | 863 | return 0; |
8ce998d6 ACM |
864 | } |
865 | ||
d45868d3 ACM |
866 | static bool elf_sym__is_a(GElf_Sym *self, enum map_type type) |
867 | { | |
868 | switch (type) { | |
869 | case MAP__FUNCTION: | |
870 | return elf_sym__is_function(self); | |
f1dfa0b1 ACM |
871 | case MAP__VARIABLE: |
872 | return elf_sym__is_object(self); | |
d45868d3 ACM |
873 | default: |
874 | return false; | |
875 | } | |
876 | } | |
877 | ||
878 | static bool elf_sec__is_a(GElf_Shdr *self, Elf_Data *secstrs, enum map_type type) | |
879 | { | |
880 | switch (type) { | |
881 | case MAP__FUNCTION: | |
882 | return elf_sec__is_text(self, secstrs); | |
f1dfa0b1 ACM |
883 | case MAP__VARIABLE: |
884 | return elf_sec__is_data(self, secstrs); | |
d45868d3 ACM |
885 | default: |
886 | return false; | |
887 | } | |
888 | } | |
889 | ||
95011c60 | 890 | static int dso__load_sym(struct dso *self, struct map *map, |
4aa65636 | 891 | struct perf_session *session, const char *name, int fd, |
95011c60 | 892 | symbol_filter_t filter, int kernel, int kmodule) |
a2928c42 | 893 | { |
2e538c4a ACM |
894 | struct map *curr_map = map; |
895 | struct dso *curr_dso = self; | |
896 | size_t dso_name_len = strlen(self->short_name); | |
6cfcc53e | 897 | Elf_Data *symstrs, *secstrs; |
a2928c42 ACM |
898 | uint32_t nr_syms; |
899 | int err = -1; | |
83a0944f | 900 | uint32_t idx; |
a2928c42 ACM |
901 | GElf_Ehdr ehdr; |
902 | GElf_Shdr shdr; | |
903 | Elf_Data *syms; | |
904 | GElf_Sym sym; | |
a25e46c4 | 905 | Elf_Scn *sec, *sec_strndx; |
a2928c42 | 906 | Elf *elf; |
439d473b | 907 | int nr = 0; |
a2928c42 | 908 | |
84087126 | 909 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
a2928c42 | 910 | if (elf == NULL) { |
6beba7ad | 911 | pr_err("%s: cannot read %s ELF file.\n", __func__, name); |
a2928c42 ACM |
912 | goto out_close; |
913 | } | |
914 | ||
915 | if (gelf_getehdr(elf, &ehdr) == NULL) { | |
6beba7ad | 916 | pr_err("%s: cannot get elf header.\n", __func__); |
a2928c42 ACM |
917 | goto out_elf_end; |
918 | } | |
919 | ||
920 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL); | |
8ce998d6 | 921 | if (sec == NULL) { |
a25e46c4 ACM |
922 | sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL); |
923 | if (sec == NULL) | |
8ce998d6 | 924 | goto out_elf_end; |
8ce998d6 | 925 | } |
a2928c42 ACM |
926 | |
927 | syms = elf_getdata(sec, NULL); | |
928 | if (syms == NULL) | |
929 | goto out_elf_end; | |
930 | ||
931 | sec = elf_getscn(elf, shdr.sh_link); | |
932 | if (sec == NULL) | |
933 | goto out_elf_end; | |
934 | ||
935 | symstrs = elf_getdata(sec, NULL); | |
936 | if (symstrs == NULL) | |
937 | goto out_elf_end; | |
938 | ||
6cfcc53e MG |
939 | sec_strndx = elf_getscn(elf, ehdr.e_shstrndx); |
940 | if (sec_strndx == NULL) | |
941 | goto out_elf_end; | |
942 | ||
943 | secstrs = elf_getdata(sec_strndx, NULL); | |
9b30a26b | 944 | if (secstrs == NULL) |
6cfcc53e MG |
945 | goto out_elf_end; |
946 | ||
a2928c42 ACM |
947 | nr_syms = shdr.sh_size / shdr.sh_entsize; |
948 | ||
e9fbc9dc | 949 | memset(&sym, 0, sizeof(sym)); |
d20ff6bd MG |
950 | if (!kernel) { |
951 | self->adjust_symbols = (ehdr.e_type == ET_EXEC || | |
30d7a77d ACM |
952 | elf_section_by_name(elf, &ehdr, &shdr, |
953 | ".gnu.prelink_undo", | |
954 | NULL) != NULL); | |
d20ff6bd MG |
955 | } else self->adjust_symbols = 0; |
956 | ||
83a0944f | 957 | elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) { |
a2928c42 | 958 | struct symbol *f; |
56b03f3c | 959 | const char *elf_name = elf_sym__name(&sym, symstrs); |
2e538c4a | 960 | char *demangled = NULL; |
6cfcc53e MG |
961 | int is_label = elf_sym__is_label(&sym); |
962 | const char *section_name; | |
a2928c42 | 963 | |
56b03f3c ACM |
964 | if (kernel && session->ref_reloc_sym.name != NULL && |
965 | strcmp(elf_name, session->ref_reloc_sym.name) == 0) | |
966 | perf_session__reloc_vmlinux_maps(session, sym.st_value); | |
967 | ||
d45868d3 | 968 | if (!is_label && !elf_sym__is_a(&sym, map->type)) |
a2928c42 ACM |
969 | continue; |
970 | ||
971 | sec = elf_getscn(elf, sym.st_shndx); | |
972 | if (!sec) | |
973 | goto out_elf_end; | |
974 | ||
975 | gelf_getshdr(sec, &shdr); | |
6cfcc53e | 976 | |
d45868d3 | 977 | if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type)) |
6cfcc53e MG |
978 | continue; |
979 | ||
980 | section_name = elf_sec__name(&shdr, secstrs); | |
0b73da3f | 981 | |
2e538c4a ACM |
982 | if (kernel || kmodule) { |
983 | char dso_name[PATH_MAX]; | |
984 | ||
985 | if (strcmp(section_name, | |
986 | curr_dso->short_name + dso_name_len) == 0) | |
987 | goto new_symbol; | |
988 | ||
989 | if (strcmp(section_name, ".text") == 0) { | |
990 | curr_map = map; | |
991 | curr_dso = self; | |
992 | goto new_symbol; | |
993 | } | |
994 | ||
995 | snprintf(dso_name, sizeof(dso_name), | |
996 | "%s%s", self->short_name, section_name); | |
997 | ||
4aa65636 | 998 | curr_map = map_groups__find_by_name(&session->kmaps, map->type, dso_name); |
2e538c4a ACM |
999 | if (curr_map == NULL) { |
1000 | u64 start = sym.st_value; | |
1001 | ||
1002 | if (kmodule) | |
1003 | start += map->start + shdr.sh_offset; | |
1004 | ||
00a192b3 | 1005 | curr_dso = dso__new(dso_name); |
2e538c4a ACM |
1006 | if (curr_dso == NULL) |
1007 | goto out_elf_end; | |
3610583c ACM |
1008 | curr_map = map__new2(start, curr_dso, |
1009 | MAP__FUNCTION); | |
2e538c4a ACM |
1010 | if (curr_map == NULL) { |
1011 | dso__delete(curr_dso); | |
1012 | goto out_elf_end; | |
1013 | } | |
ed52ce2e ACM |
1014 | curr_map->map_ip = identity__map_ip; |
1015 | curr_map->unmap_ip = identity__map_ip; | |
2e538c4a | 1016 | curr_dso->origin = DSO__ORIG_KERNEL; |
4aa65636 | 1017 | map_groups__insert(&session->kmaps, curr_map); |
b0da954a | 1018 | dsos__add(&dsos__kernel, curr_dso); |
2e538c4a ACM |
1019 | } else |
1020 | curr_dso = curr_map->dso; | |
1021 | ||
1022 | goto new_symbol; | |
af427bf5 ACM |
1023 | } |
1024 | ||
2e538c4a | 1025 | if (curr_dso->adjust_symbols) { |
6beba7ad ACM |
1026 | pr_debug2("adjusting symbol: st_value: %Lx sh_addr: " |
1027 | "%Lx sh_offset: %Lx\n", (u64)sym.st_value, | |
1028 | (u64)shdr.sh_addr, (u64)shdr.sh_offset); | |
f5812a7a | 1029 | sym.st_value -= shdr.sh_addr - shdr.sh_offset; |
af427bf5 | 1030 | } |
28ac909b ACM |
1031 | /* |
1032 | * We need to figure out if the object was created from C++ sources | |
1033 | * DWARF DW_compile_unit has this, but we don't always have access | |
1034 | * to it... | |
1035 | */ | |
83a0944f | 1036 | demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI); |
28ac909b | 1037 | if (demangled != NULL) |
83a0944f | 1038 | elf_name = demangled; |
2e538c4a | 1039 | new_symbol: |
00a192b3 | 1040 | f = symbol__new(sym.st_value, sym.st_size, elf_name); |
28ac909b | 1041 | free(demangled); |
a2928c42 ACM |
1042 | if (!f) |
1043 | goto out_elf_end; | |
1044 | ||
2e538c4a | 1045 | if (filter && filter(curr_map, f)) |
00a192b3 | 1046 | symbol__delete(f); |
69ee69f6 | 1047 | else { |
6a4694a4 | 1048 | symbols__insert(&curr_dso->symbols[curr_map->type], f); |
69ee69f6 ACM |
1049 | nr++; |
1050 | } | |
a2928c42 ACM |
1051 | } |
1052 | ||
2e538c4a ACM |
1053 | /* |
1054 | * For misannotated, zeroed, ASM function sizes. | |
1055 | */ | |
1056 | if (nr > 0) | |
6a4694a4 | 1057 | symbols__fixup_end(&self->symbols[map->type]); |
a2928c42 ACM |
1058 | err = nr; |
1059 | out_elf_end: | |
1060 | elf_end(elf); | |
1061 | out_close: | |
1062 | return err; | |
1063 | } | |
1064 | ||
78075caa ACM |
1065 | static bool dso__build_id_equal(const struct dso *self, u8 *build_id) |
1066 | { | |
1067 | return memcmp(self->build_id, build_id, sizeof(self->build_id)) == 0; | |
1068 | } | |
1069 | ||
b0da954a | 1070 | static bool __dsos__read_build_ids(struct list_head *head) |
57f395a7 | 1071 | { |
e30a3d12 | 1072 | bool have_build_id = false; |
57f395a7 FW |
1073 | struct dso *pos; |
1074 | ||
b0da954a | 1075 | list_for_each_entry(pos, head, node) |
e30a3d12 ACM |
1076 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1077 | sizeof(pos->build_id)) > 0) { | |
1078 | have_build_id = true; | |
1079 | pos->has_build_id = true; | |
1080 | } | |
57f395a7 | 1081 | |
e30a3d12 | 1082 | return have_build_id; |
57f395a7 FW |
1083 | } |
1084 | ||
b0da954a ACM |
1085 | bool dsos__read_build_ids(void) |
1086 | { | |
8b4825bf ACM |
1087 | bool kbuildids = __dsos__read_build_ids(&dsos__kernel), |
1088 | ubuildids = __dsos__read_build_ids(&dsos__user); | |
1089 | return kbuildids || ubuildids; | |
b0da954a ACM |
1090 | } |
1091 | ||
fd7a346e ACM |
1092 | /* |
1093 | * Align offset to 4 bytes as needed for note name and descriptor data. | |
1094 | */ | |
1095 | #define NOTE_ALIGN(n) (((n) + 3) & -4U) | |
1096 | ||
2643ce11 | 1097 | int filename__read_build_id(const char *filename, void *bf, size_t size) |
4d1e00a8 | 1098 | { |
2643ce11 | 1099 | int fd, err = -1; |
4d1e00a8 ACM |
1100 | GElf_Ehdr ehdr; |
1101 | GElf_Shdr shdr; | |
fd7a346e | 1102 | Elf_Data *data; |
4d1e00a8 | 1103 | Elf_Scn *sec; |
e57cfcda | 1104 | Elf_Kind ek; |
fd7a346e | 1105 | void *ptr; |
4d1e00a8 | 1106 | Elf *elf; |
4d1e00a8 | 1107 | |
2643ce11 ACM |
1108 | if (size < BUILD_ID_SIZE) |
1109 | goto out; | |
1110 | ||
1111 | fd = open(filename, O_RDONLY); | |
4d1e00a8 ACM |
1112 | if (fd < 0) |
1113 | goto out; | |
1114 | ||
84087126 | 1115 | elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL); |
4d1e00a8 | 1116 | if (elf == NULL) { |
8d06367f | 1117 | pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename); |
4d1e00a8 ACM |
1118 | goto out_close; |
1119 | } | |
1120 | ||
e57cfcda PE |
1121 | ek = elf_kind(elf); |
1122 | if (ek != ELF_K_ELF) | |
1123 | goto out_elf_end; | |
1124 | ||
4d1e00a8 | 1125 | if (gelf_getehdr(elf, &ehdr) == NULL) { |
6beba7ad | 1126 | pr_err("%s: cannot get elf header.\n", __func__); |
4d1e00a8 ACM |
1127 | goto out_elf_end; |
1128 | } | |
1129 | ||
2643ce11 ACM |
1130 | sec = elf_section_by_name(elf, &ehdr, &shdr, |
1131 | ".note.gnu.build-id", NULL); | |
fd7a346e ACM |
1132 | if (sec == NULL) { |
1133 | sec = elf_section_by_name(elf, &ehdr, &shdr, | |
1134 | ".notes", NULL); | |
1135 | if (sec == NULL) | |
1136 | goto out_elf_end; | |
1137 | } | |
4d1e00a8 | 1138 | |
fd7a346e ACM |
1139 | data = elf_getdata(sec, NULL); |
1140 | if (data == NULL) | |
4d1e00a8 | 1141 | goto out_elf_end; |
fd7a346e ACM |
1142 | |
1143 | ptr = data->d_buf; | |
1144 | while (ptr < (data->d_buf + data->d_size)) { | |
1145 | GElf_Nhdr *nhdr = ptr; | |
1146 | int namesz = NOTE_ALIGN(nhdr->n_namesz), | |
1147 | descsz = NOTE_ALIGN(nhdr->n_descsz); | |
1148 | const char *name; | |
1149 | ||
1150 | ptr += sizeof(*nhdr); | |
1151 | name = ptr; | |
1152 | ptr += namesz; | |
1153 | if (nhdr->n_type == NT_GNU_BUILD_ID && | |
1154 | nhdr->n_namesz == sizeof("GNU")) { | |
1155 | if (memcmp(name, "GNU", sizeof("GNU")) == 0) { | |
1156 | memcpy(bf, ptr, BUILD_ID_SIZE); | |
1157 | err = BUILD_ID_SIZE; | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | ptr += descsz; | |
1162 | } | |
2643ce11 ACM |
1163 | out_elf_end: |
1164 | elf_end(elf); | |
1165 | out_close: | |
1166 | close(fd); | |
1167 | out: | |
1168 | return err; | |
1169 | } | |
1170 | ||
f1617b40 ACM |
1171 | int sysfs__read_build_id(const char *filename, void *build_id, size_t size) |
1172 | { | |
1173 | int fd, err = -1; | |
1174 | ||
1175 | if (size < BUILD_ID_SIZE) | |
1176 | goto out; | |
1177 | ||
1178 | fd = open(filename, O_RDONLY); | |
1179 | if (fd < 0) | |
1180 | goto out; | |
1181 | ||
1182 | while (1) { | |
1183 | char bf[BUFSIZ]; | |
1184 | GElf_Nhdr nhdr; | |
1185 | int namesz, descsz; | |
1186 | ||
1187 | if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr)) | |
1188 | break; | |
1189 | ||
fd7a346e ACM |
1190 | namesz = NOTE_ALIGN(nhdr.n_namesz); |
1191 | descsz = NOTE_ALIGN(nhdr.n_descsz); | |
f1617b40 ACM |
1192 | if (nhdr.n_type == NT_GNU_BUILD_ID && |
1193 | nhdr.n_namesz == sizeof("GNU")) { | |
1194 | if (read(fd, bf, namesz) != namesz) | |
1195 | break; | |
1196 | if (memcmp(bf, "GNU", sizeof("GNU")) == 0) { | |
1197 | if (read(fd, build_id, | |
1198 | BUILD_ID_SIZE) == BUILD_ID_SIZE) { | |
1199 | err = 0; | |
1200 | break; | |
1201 | } | |
1202 | } else if (read(fd, bf, descsz) != descsz) | |
1203 | break; | |
1204 | } else { | |
1205 | int n = namesz + descsz; | |
1206 | if (read(fd, bf, n) != n) | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | close(fd); | |
1211 | out: | |
1212 | return err; | |
1213 | } | |
1214 | ||
94cb9e38 ACM |
1215 | char dso__symtab_origin(const struct dso *self) |
1216 | { | |
1217 | static const char origin[] = { | |
1218 | [DSO__ORIG_KERNEL] = 'k', | |
1219 | [DSO__ORIG_JAVA_JIT] = 'j', | |
4cf40131 | 1220 | [DSO__ORIG_BUILD_ID_CACHE] = 'B', |
94cb9e38 ACM |
1221 | [DSO__ORIG_FEDORA] = 'f', |
1222 | [DSO__ORIG_UBUNTU] = 'u', | |
1223 | [DSO__ORIG_BUILDID] = 'b', | |
1224 | [DSO__ORIG_DSO] = 'd', | |
439d473b | 1225 | [DSO__ORIG_KMODULE] = 'K', |
94cb9e38 ACM |
1226 | }; |
1227 | ||
1228 | if (self == NULL || self->origin == DSO__ORIG_NOT_FOUND) | |
1229 | return '!'; | |
1230 | return origin[self->origin]; | |
1231 | } | |
1232 | ||
4aa65636 ACM |
1233 | int dso__load(struct dso *self, struct map *map, struct perf_session *session, |
1234 | symbol_filter_t filter) | |
a2928c42 | 1235 | { |
4d1e00a8 | 1236 | int size = PATH_MAX; |
c338aee8 | 1237 | char *name; |
d3379ab9 | 1238 | u8 build_id[BUILD_ID_SIZE]; |
4cf40131 | 1239 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; |
a2928c42 ACM |
1240 | int ret = -1; |
1241 | int fd; | |
1242 | ||
3610583c | 1243 | dso__set_loaded(self, map->type); |
66bd8424 | 1244 | |
c338aee8 | 1245 | if (self->kernel) |
4aa65636 | 1246 | return dso__load_kernel_sym(self, map, session, filter); |
c338aee8 ACM |
1247 | |
1248 | name = malloc(size); | |
a2928c42 ACM |
1249 | if (!name) |
1250 | return -1; | |
1251 | ||
30d7a77d | 1252 | self->adjust_symbols = 0; |
f5812a7a | 1253 | |
94cb9e38 | 1254 | if (strncmp(self->name, "/tmp/perf-", 10) == 0) { |
6beba7ad | 1255 | ret = dso__load_perf_map(self, map, filter); |
94cb9e38 ACM |
1256 | self->origin = ret > 0 ? DSO__ORIG_JAVA_JIT : |
1257 | DSO__ORIG_NOT_FOUND; | |
1258 | return ret; | |
1259 | } | |
1260 | ||
4cf40131 | 1261 | self->origin = DSO__ORIG_BUILD_ID_CACHE; |
80d496be | 1262 | |
4cf40131 ACM |
1263 | if (self->has_build_id) { |
1264 | build_id__sprintf(self->build_id, sizeof(self->build_id), | |
1265 | build_id_hex); | |
1266 | snprintf(name, size, "%s/%s/.build-id/%.2s/%s", | |
1267 | getenv("HOME"), DEBUG_CACHE_DIR, | |
1268 | build_id_hex, build_id_hex + 2); | |
1269 | goto open_file; | |
1270 | } | |
a2928c42 ACM |
1271 | more: |
1272 | do { | |
94cb9e38 ACM |
1273 | self->origin++; |
1274 | switch (self->origin) { | |
1275 | case DSO__ORIG_FEDORA: | |
439d473b ACM |
1276 | snprintf(name, size, "/usr/lib/debug%s.debug", |
1277 | self->long_name); | |
a2928c42 | 1278 | break; |
94cb9e38 | 1279 | case DSO__ORIG_UBUNTU: |
439d473b ACM |
1280 | snprintf(name, size, "/usr/lib/debug%s", |
1281 | self->long_name); | |
a2928c42 | 1282 | break; |
94cb9e38 | 1283 | case DSO__ORIG_BUILDID: |
d3379ab9 ACM |
1284 | if (filename__read_build_id(self->long_name, build_id, |
1285 | sizeof(build_id))) { | |
d3379ab9 ACM |
1286 | build_id__sprintf(build_id, sizeof(build_id), |
1287 | build_id_hex); | |
4d1e00a8 ACM |
1288 | snprintf(name, size, |
1289 | "/usr/lib/debug/.build-id/%.2s/%s.debug", | |
d3379ab9 ACM |
1290 | build_id_hex, build_id_hex + 2); |
1291 | if (self->has_build_id) | |
1292 | goto compare_build_id; | |
1293 | break; | |
4d1e00a8 | 1294 | } |
94cb9e38 | 1295 | self->origin++; |
4d1e00a8 | 1296 | /* Fall thru */ |
94cb9e38 | 1297 | case DSO__ORIG_DSO: |
439d473b | 1298 | snprintf(name, size, "%s", self->long_name); |
a2928c42 ACM |
1299 | break; |
1300 | ||
1301 | default: | |
1302 | goto out; | |
1303 | } | |
a2928c42 | 1304 | |
8d06367f | 1305 | if (self->has_build_id) { |
d3379ab9 ACM |
1306 | if (filename__read_build_id(name, build_id, |
1307 | sizeof(build_id)) < 0) | |
8d06367f | 1308 | goto more; |
8d06367f | 1309 | compare_build_id: |
78075caa | 1310 | if (!dso__build_id_equal(self, build_id)) |
8d06367f ACM |
1311 | goto more; |
1312 | } | |
4cf40131 | 1313 | open_file: |
a2928c42 ACM |
1314 | fd = open(name, O_RDONLY); |
1315 | } while (fd < 0); | |
1316 | ||
95011c60 | 1317 | ret = dso__load_sym(self, map, NULL, name, fd, filter, 0, 0); |
a2928c42 ACM |
1318 | close(fd); |
1319 | ||
1320 | /* | |
1321 | * Some people seem to have debuginfo files _WITHOUT_ debug info!?!? | |
1322 | */ | |
1323 | if (!ret) | |
1324 | goto more; | |
1325 | ||
a25e46c4 | 1326 | if (ret > 0) { |
82164161 | 1327 | int nr_plt = dso__synthesize_plt_symbols(self, map, filter); |
a25e46c4 ACM |
1328 | if (nr_plt > 0) |
1329 | ret += nr_plt; | |
1330 | } | |
a2928c42 ACM |
1331 | out: |
1332 | free(name); | |
1340e6bb ACM |
1333 | if (ret < 0 && strstr(self->name, " (deleted)") != NULL) |
1334 | return 0; | |
a2928c42 ACM |
1335 | return ret; |
1336 | } | |
1337 | ||
79406cd7 ACM |
1338 | struct map *map_groups__find_by_name(struct map_groups *self, |
1339 | enum map_type type, const char *name) | |
439d473b ACM |
1340 | { |
1341 | struct rb_node *nd; | |
1342 | ||
79406cd7 | 1343 | for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) { |
439d473b ACM |
1344 | struct map *map = rb_entry(nd, struct map, rb_node); |
1345 | ||
1346 | if (map->dso && strcmp(map->dso->name, name) == 0) | |
1347 | return map; | |
1348 | } | |
1349 | ||
1350 | return NULL; | |
1351 | } | |
1352 | ||
4aa65636 | 1353 | static int perf_session__set_modules_path_dir(struct perf_session *self, char *dirname) |
6cfcc53e | 1354 | { |
439d473b | 1355 | struct dirent *dent; |
439d473b | 1356 | DIR *dir = opendir(dirname); |
6cfcc53e | 1357 | |
439d473b | 1358 | if (!dir) { |
87f8ea4c | 1359 | pr_debug("%s: cannot open %s dir\n", __func__, dirname); |
439d473b ACM |
1360 | return -1; |
1361 | } | |
6cfcc53e | 1362 | |
439d473b ACM |
1363 | while ((dent = readdir(dir)) != NULL) { |
1364 | char path[PATH_MAX]; | |
1365 | ||
1366 | if (dent->d_type == DT_DIR) { | |
1367 | if (!strcmp(dent->d_name, ".") || | |
1368 | !strcmp(dent->d_name, "..")) | |
1369 | continue; | |
1370 | ||
1371 | snprintf(path, sizeof(path), "%s/%s", | |
1372 | dirname, dent->d_name); | |
4aa65636 | 1373 | if (perf_session__set_modules_path_dir(self, path) < 0) |
439d473b ACM |
1374 | goto failure; |
1375 | } else { | |
1376 | char *dot = strrchr(dent->d_name, '.'), | |
1377 | dso_name[PATH_MAX]; | |
1378 | struct map *map; | |
cfc10d3b | 1379 | char *long_name; |
439d473b ACM |
1380 | |
1381 | if (dot == NULL || strcmp(dot, ".ko")) | |
1382 | continue; | |
1383 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
1384 | (int)(dot - dent->d_name), dent->d_name); | |
1385 | ||
a2a99e8e | 1386 | strxfrchar(dso_name, '-', '_'); |
4aa65636 | 1387 | map = map_groups__find_by_name(&self->kmaps, MAP__FUNCTION, dso_name); |
439d473b ACM |
1388 | if (map == NULL) |
1389 | continue; | |
1390 | ||
1391 | snprintf(path, sizeof(path), "%s/%s", | |
1392 | dirname, dent->d_name); | |
1393 | ||
cfc10d3b ACM |
1394 | long_name = strdup(path); |
1395 | if (long_name == NULL) | |
439d473b | 1396 | goto failure; |
cfc10d3b | 1397 | dso__set_long_name(map->dso, long_name); |
439d473b | 1398 | } |
439d473b | 1399 | } |
6cfcc53e | 1400 | |
c338aee8 | 1401 | return 0; |
439d473b ACM |
1402 | failure: |
1403 | closedir(dir); | |
1404 | return -1; | |
1405 | } | |
6cfcc53e | 1406 | |
4aa65636 | 1407 | static int perf_session__set_modules_path(struct perf_session *self) |
439d473b ACM |
1408 | { |
1409 | struct utsname uts; | |
1410 | char modules_path[PATH_MAX]; | |
6cfcc53e | 1411 | |
439d473b ACM |
1412 | if (uname(&uts) < 0) |
1413 | return -1; | |
6cfcc53e | 1414 | |
439d473b ACM |
1415 | snprintf(modules_path, sizeof(modules_path), "/lib/modules/%s/kernel", |
1416 | uts.release); | |
6cfcc53e | 1417 | |
4aa65636 | 1418 | return perf_session__set_modules_path_dir(self, modules_path); |
6cfcc53e MG |
1419 | } |
1420 | ||
439d473b ACM |
1421 | /* |
1422 | * Constructor variant for modules (where we know from /proc/modules where | |
1423 | * they are loaded) and for vmlinux, where only after we load all the | |
1424 | * symbols we'll know where it starts and ends. | |
1425 | */ | |
3610583c | 1426 | static struct map *map__new2(u64 start, struct dso *dso, enum map_type type) |
6cfcc53e | 1427 | { |
439d473b | 1428 | struct map *self = malloc(sizeof(*self)); |
6cfcc53e | 1429 | |
439d473b | 1430 | if (self != NULL) { |
439d473b | 1431 | /* |
afb7b4f0 | 1432 | * ->end will be filled after we load all the symbols |
439d473b | 1433 | */ |
3610583c | 1434 | map__init(self, type, start, 0, 0, dso); |
439d473b | 1435 | } |
afb7b4f0 | 1436 | |
439d473b ACM |
1437 | return self; |
1438 | } | |
1439 | ||
4aa65636 | 1440 | static int perf_session__create_module_maps(struct perf_session *self) |
439d473b ACM |
1441 | { |
1442 | char *line = NULL; | |
1443 | size_t n; | |
1444 | FILE *file = fopen("/proc/modules", "r"); | |
1445 | struct map *map; | |
6cfcc53e | 1446 | |
439d473b ACM |
1447 | if (file == NULL) |
1448 | return -1; | |
6cfcc53e | 1449 | |
439d473b ACM |
1450 | while (!feof(file)) { |
1451 | char name[PATH_MAX]; | |
1452 | u64 start; | |
1453 | struct dso *dso; | |
1454 | char *sep; | |
1455 | int line_len; | |
6cfcc53e | 1456 | |
439d473b ACM |
1457 | line_len = getline(&line, &n, file); |
1458 | if (line_len < 0) | |
1459 | break; | |
1460 | ||
1461 | if (!line) | |
1462 | goto out_failure; | |
1463 | ||
1464 | line[--line_len] = '\0'; /* \n */ | |
1465 | ||
1466 | sep = strrchr(line, 'x'); | |
1467 | if (sep == NULL) | |
1468 | continue; | |
1469 | ||
1470 | hex2u64(sep + 1, &start); | |
1471 | ||
1472 | sep = strchr(line, ' '); | |
1473 | if (sep == NULL) | |
1474 | continue; | |
1475 | ||
1476 | *sep = '\0'; | |
1477 | ||
1478 | snprintf(name, sizeof(name), "[%s]", line); | |
00a192b3 | 1479 | dso = dso__new(name); |
439d473b ACM |
1480 | |
1481 | if (dso == NULL) | |
1482 | goto out_delete_line; | |
1483 | ||
3610583c | 1484 | map = map__new2(start, dso, MAP__FUNCTION); |
439d473b ACM |
1485 | if (map == NULL) { |
1486 | dso__delete(dso); | |
1487 | goto out_delete_line; | |
6cfcc53e | 1488 | } |
439d473b | 1489 | |
f1617b40 ACM |
1490 | snprintf(name, sizeof(name), |
1491 | "/sys/module/%s/notes/.note.gnu.build-id", line); | |
1492 | if (sysfs__read_build_id(name, dso->build_id, | |
1493 | sizeof(dso->build_id)) == 0) | |
1494 | dso->has_build_id = true; | |
1495 | ||
439d473b | 1496 | dso->origin = DSO__ORIG_KMODULE; |
4aa65636 | 1497 | map_groups__insert(&self->kmaps, map); |
b0da954a | 1498 | dsos__add(&dsos__kernel, dso); |
6cfcc53e | 1499 | } |
439d473b ACM |
1500 | |
1501 | free(line); | |
1502 | fclose(file); | |
1503 | ||
4aa65636 | 1504 | return perf_session__set_modules_path(self); |
439d473b ACM |
1505 | |
1506 | out_delete_line: | |
1507 | free(line); | |
1508 | out_failure: | |
1509 | return -1; | |
6cfcc53e MG |
1510 | } |
1511 | ||
9958e1f0 | 1512 | static int dso__load_vmlinux(struct dso *self, struct map *map, |
4aa65636 | 1513 | struct perf_session *session, |
6beba7ad | 1514 | const char *vmlinux, symbol_filter_t filter) |
a2928c42 | 1515 | { |
fbd733b8 | 1516 | int err = -1, fd; |
a2928c42 | 1517 | |
fbd733b8 ACM |
1518 | if (self->has_build_id) { |
1519 | u8 build_id[BUILD_ID_SIZE]; | |
1520 | ||
1521 | if (filename__read_build_id(vmlinux, build_id, | |
1522 | sizeof(build_id)) < 0) { | |
1523 | pr_debug("No build_id in %s, ignoring it\n", vmlinux); | |
1524 | return -1; | |
1525 | } | |
1526 | if (!dso__build_id_equal(self, build_id)) { | |
1527 | char expected_build_id[BUILD_ID_SIZE * 2 + 1], | |
1528 | vmlinux_build_id[BUILD_ID_SIZE * 2 + 1]; | |
1529 | ||
1530 | build_id__sprintf(self->build_id, | |
1531 | sizeof(self->build_id), | |
1532 | expected_build_id); | |
1533 | build_id__sprintf(build_id, sizeof(build_id), | |
1534 | vmlinux_build_id); | |
1535 | pr_debug("build_id in %s is %s while expected is %s, " | |
1536 | "ignoring it\n", vmlinux, vmlinux_build_id, | |
1537 | expected_build_id); | |
1538 | return -1; | |
1539 | } | |
1540 | } | |
66bd8424 | 1541 | |
fbd733b8 | 1542 | fd = open(vmlinux, O_RDONLY); |
a2928c42 ACM |
1543 | if (fd < 0) |
1544 | return -1; | |
1545 | ||
3610583c | 1546 | dso__set_loaded(self, map->type); |
4aa65636 | 1547 | err = dso__load_sym(self, map, session, self->long_name, fd, filter, 1, 0); |
a2928c42 ACM |
1548 | close(fd); |
1549 | ||
1550 | return err; | |
1551 | } | |
1552 | ||
c338aee8 | 1553 | static int dso__load_kernel_sym(struct dso *self, struct map *map, |
4aa65636 | 1554 | struct perf_session *session, symbol_filter_t filter) |
a827c875 | 1555 | { |
cc612d81 ACM |
1556 | int err; |
1557 | bool is_kallsyms; | |
1558 | ||
1559 | if (vmlinux_path != NULL) { | |
1560 | int i; | |
1561 | pr_debug("Looking at the vmlinux_path (%d entries long)\n", | |
1562 | vmlinux_path__nr_entries); | |
1563 | for (i = 0; i < vmlinux_path__nr_entries; ++i) { | |
4aa65636 | 1564 | err = dso__load_vmlinux(self, map, session, |
95011c60 | 1565 | vmlinux_path[i], filter); |
cc612d81 ACM |
1566 | if (err > 0) { |
1567 | pr_debug("Using %s for symbols\n", | |
1568 | vmlinux_path[i]); | |
1569 | dso__set_long_name(self, | |
1570 | strdup(vmlinux_path[i])); | |
1571 | goto out_fixup; | |
1572 | } | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | is_kallsyms = self->long_name[0] == '['; | |
1577 | if (is_kallsyms) | |
1578 | goto do_kallsyms; | |
439d473b | 1579 | |
4aa65636 | 1580 | err = dso__load_vmlinux(self, map, session, self->long_name, filter); |
ef6ae724 | 1581 | if (err <= 0) { |
cc612d81 ACM |
1582 | pr_info("The file %s cannot be used, " |
1583 | "trying to use /proc/kallsyms...", self->long_name); | |
cc612d81 | 1584 | do_kallsyms: |
4aa65636 | 1585 | err = dso__load_kallsyms(self, map, session, filter); |
cc612d81 | 1586 | if (err > 0 && !is_kallsyms) |
ef6ae724 ACM |
1587 | dso__set_long_name(self, strdup("[kernel.kallsyms]")); |
1588 | } | |
439d473b ACM |
1589 | |
1590 | if (err > 0) { | |
cc612d81 | 1591 | out_fixup: |
6a4694a4 ACM |
1592 | map__fixup_start(map); |
1593 | map__fixup_end(map); | |
439d473b | 1594 | } |
94cb9e38 | 1595 | |
a827c875 ACM |
1596 | return err; |
1597 | } | |
1598 | ||
b0da954a ACM |
1599 | LIST_HEAD(dsos__user); |
1600 | LIST_HEAD(dsos__kernel); | |
cc612d81 | 1601 | struct dso *vdso; |
cd84c2ac | 1602 | |
b0da954a | 1603 | static void dsos__add(struct list_head *head, struct dso *dso) |
cd84c2ac | 1604 | { |
b0da954a | 1605 | list_add_tail(&dso->node, head); |
cd84c2ac FW |
1606 | } |
1607 | ||
b0da954a | 1608 | static struct dso *dsos__find(struct list_head *head, const char *name) |
cd84c2ac FW |
1609 | { |
1610 | struct dso *pos; | |
1611 | ||
b0da954a | 1612 | list_for_each_entry(pos, head, node) |
cd84c2ac FW |
1613 | if (strcmp(pos->name, name) == 0) |
1614 | return pos; | |
1615 | return NULL; | |
1616 | } | |
1617 | ||
a89e5abe | 1618 | struct dso *__dsos__findnew(struct list_head *head, const char *name) |
cd84c2ac | 1619 | { |
a89e5abe | 1620 | struct dso *dso = dsos__find(head, name); |
cd84c2ac | 1621 | |
e4204992 | 1622 | if (!dso) { |
00a192b3 | 1623 | dso = dso__new(name); |
cfc10d3b | 1624 | if (dso != NULL) { |
a89e5abe | 1625 | dsos__add(head, dso); |
cfc10d3b ACM |
1626 | dso__set_basename(dso); |
1627 | } | |
66bd8424 | 1628 | } |
cd84c2ac FW |
1629 | |
1630 | return dso; | |
cd84c2ac FW |
1631 | } |
1632 | ||
b0da954a | 1633 | static void __dsos__fprintf(struct list_head *head, FILE *fp) |
cd84c2ac FW |
1634 | { |
1635 | struct dso *pos; | |
1636 | ||
95011c60 ACM |
1637 | list_for_each_entry(pos, head, node) { |
1638 | int i; | |
1639 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
1640 | dso__fprintf(pos, i, fp); | |
1641 | } | |
cd84c2ac FW |
1642 | } |
1643 | ||
b0da954a ACM |
1644 | void dsos__fprintf(FILE *fp) |
1645 | { | |
1646 | __dsos__fprintf(&dsos__kernel, fp); | |
1647 | __dsos__fprintf(&dsos__user, fp); | |
1648 | } | |
1649 | ||
1650 | static size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp) | |
9e03eb2d ACM |
1651 | { |
1652 | struct dso *pos; | |
1653 | size_t ret = 0; | |
1654 | ||
b0da954a | 1655 | list_for_each_entry(pos, head, node) { |
9e03eb2d | 1656 | ret += dso__fprintf_buildid(pos, fp); |
1124ba73 | 1657 | ret += fprintf(fp, " %s\n", pos->long_name); |
9e03eb2d ACM |
1658 | } |
1659 | return ret; | |
1660 | } | |
1661 | ||
b0da954a ACM |
1662 | size_t dsos__fprintf_buildid(FILE *fp) |
1663 | { | |
1664 | return (__dsos__fprintf_buildid(&dsos__kernel, fp) + | |
1665 | __dsos__fprintf_buildid(&dsos__user, fp)); | |
1666 | } | |
1667 | ||
de176489 | 1668 | static struct dso *dsos__create_kernel(const char *vmlinux) |
cd84c2ac | 1669 | { |
95011c60 | 1670 | struct dso *kernel = dso__new(vmlinux ?: "[kernel.kallsyms]"); |
cd84c2ac | 1671 | |
2446042c | 1672 | if (kernel == NULL) |
f1dfa0b1 | 1673 | return NULL; |
c338aee8 | 1674 | |
4e06255f ACM |
1675 | kernel->short_name = "[kernel]"; |
1676 | kernel->kernel = 1; | |
2446042c | 1677 | |
00a192b3 | 1678 | vdso = dso__new("[vdso]"); |
c338aee8 | 1679 | if (vdso == NULL) |
f1dfa0b1 | 1680 | goto out_delete_kernel_dso; |
3610583c | 1681 | dso__set_loaded(vdso, MAP__FUNCTION); |
2446042c ACM |
1682 | |
1683 | if (sysfs__read_build_id("/sys/kernel/notes", kernel->build_id, | |
1684 | sizeof(kernel->build_id)) == 0) | |
1685 | kernel->has_build_id = true; | |
cd84c2ac | 1686 | |
b0da954a ACM |
1687 | dsos__add(&dsos__kernel, kernel); |
1688 | dsos__add(&dsos__user, vdso); | |
cd84c2ac | 1689 | |
f1dfa0b1 | 1690 | return kernel; |
c338aee8 | 1691 | |
c338aee8 ACM |
1692 | out_delete_kernel_dso: |
1693 | dso__delete(kernel); | |
f1dfa0b1 ACM |
1694 | return NULL; |
1695 | } | |
1696 | ||
de176489 ACM |
1697 | static int map_groups__create_kernel_maps(struct map_groups *self, |
1698 | struct map *vmlinux_maps[MAP__NR_TYPES], | |
1699 | const char *vmlinux) | |
f1dfa0b1 | 1700 | { |
f1dfa0b1 | 1701 | struct dso *kernel = dsos__create_kernel(vmlinux); |
de176489 | 1702 | enum map_type type; |
f1dfa0b1 ACM |
1703 | |
1704 | if (kernel == NULL) | |
1705 | return -1; | |
1706 | ||
de176489 ACM |
1707 | for (type = 0; type < MAP__NR_TYPES; ++type) { |
1708 | vmlinux_maps[type] = map__new2(0, kernel, type); | |
1709 | if (vmlinux_maps[type] == NULL) | |
1710 | return -1; | |
f1dfa0b1 | 1711 | |
de176489 ACM |
1712 | vmlinux_maps[type]->map_ip = |
1713 | vmlinux_maps[type]->unmap_ip = identity__map_ip; | |
1714 | map_groups__insert(self, vmlinux_maps[type]); | |
f1dfa0b1 ACM |
1715 | } |
1716 | ||
f1dfa0b1 | 1717 | return 0; |
2446042c ACM |
1718 | } |
1719 | ||
cc612d81 ACM |
1720 | static void vmlinux_path__exit(void) |
1721 | { | |
1722 | while (--vmlinux_path__nr_entries >= 0) { | |
1723 | free(vmlinux_path[vmlinux_path__nr_entries]); | |
1724 | vmlinux_path[vmlinux_path__nr_entries] = NULL; | |
1725 | } | |
1726 | ||
1727 | free(vmlinux_path); | |
1728 | vmlinux_path = NULL; | |
1729 | } | |
1730 | ||
1731 | static int vmlinux_path__init(void) | |
1732 | { | |
1733 | struct utsname uts; | |
1734 | char bf[PATH_MAX]; | |
1735 | ||
1736 | if (uname(&uts) < 0) | |
1737 | return -1; | |
1738 | ||
1739 | vmlinux_path = malloc(sizeof(char *) * 5); | |
1740 | if (vmlinux_path == NULL) | |
1741 | return -1; | |
1742 | ||
1743 | vmlinux_path[vmlinux_path__nr_entries] = strdup("vmlinux"); | |
1744 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1745 | goto out_fail; | |
1746 | ++vmlinux_path__nr_entries; | |
1747 | vmlinux_path[vmlinux_path__nr_entries] = strdup("/boot/vmlinux"); | |
1748 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1749 | goto out_fail; | |
1750 | ++vmlinux_path__nr_entries; | |
1751 | snprintf(bf, sizeof(bf), "/boot/vmlinux-%s", uts.release); | |
1752 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1753 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1754 | goto out_fail; | |
1755 | ++vmlinux_path__nr_entries; | |
1756 | snprintf(bf, sizeof(bf), "/lib/modules/%s/build/vmlinux", uts.release); | |
1757 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1758 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1759 | goto out_fail; | |
1760 | ++vmlinux_path__nr_entries; | |
1761 | snprintf(bf, sizeof(bf), "/usr/lib/debug/lib/modules/%s/vmlinux", | |
1762 | uts.release); | |
1763 | vmlinux_path[vmlinux_path__nr_entries] = strdup(bf); | |
1764 | if (vmlinux_path[vmlinux_path__nr_entries] == NULL) | |
1765 | goto out_fail; | |
1766 | ++vmlinux_path__nr_entries; | |
1767 | ||
1768 | return 0; | |
1769 | ||
1770 | out_fail: | |
1771 | vmlinux_path__exit(); | |
1772 | return -1; | |
1773 | } | |
1774 | ||
655000e7 ACM |
1775 | static int setup_list(struct strlist **list, const char *list_str, |
1776 | const char *list_name) | |
1777 | { | |
1778 | if (list_str == NULL) | |
1779 | return 0; | |
1780 | ||
1781 | *list = strlist__new(true, list_str); | |
1782 | if (!*list) { | |
1783 | pr_err("problems parsing %s list\n", list_name); | |
1784 | return -1; | |
1785 | } | |
1786 | return 0; | |
1787 | } | |
1788 | ||
75be6cf4 | 1789 | int symbol__init(void) |
2446042c | 1790 | { |
95011c60 | 1791 | elf_version(EV_CURRENT); |
75be6cf4 ACM |
1792 | if (symbol_conf.sort_by_name) |
1793 | symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) - | |
1794 | sizeof(struct symbol)); | |
b32d133a | 1795 | |
75be6cf4 | 1796 | if (symbol_conf.try_vmlinux_path && vmlinux_path__init() < 0) |
2446042c ACM |
1797 | return -1; |
1798 | ||
c410a338 ACM |
1799 | if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') { |
1800 | pr_err("'.' is the only non valid --field-separator argument\n"); | |
1801 | return -1; | |
1802 | } | |
1803 | ||
655000e7 ACM |
1804 | if (setup_list(&symbol_conf.dso_list, |
1805 | symbol_conf.dso_list_str, "dso") < 0) | |
1806 | return -1; | |
1807 | ||
1808 | if (setup_list(&symbol_conf.comm_list, | |
1809 | symbol_conf.comm_list_str, "comm") < 0) | |
1810 | goto out_free_dso_list; | |
1811 | ||
1812 | if (setup_list(&symbol_conf.sym_list, | |
1813 | symbol_conf.sym_list_str, "symbol") < 0) | |
1814 | goto out_free_comm_list; | |
1815 | ||
4aa65636 | 1816 | return 0; |
655000e7 ACM |
1817 | |
1818 | out_free_dso_list: | |
1819 | strlist__delete(symbol_conf.dso_list); | |
1820 | out_free_comm_list: | |
1821 | strlist__delete(symbol_conf.comm_list); | |
1822 | return -1; | |
4aa65636 ACM |
1823 | } |
1824 | ||
75be6cf4 | 1825 | int perf_session__create_kernel_maps(struct perf_session *self) |
4aa65636 | 1826 | { |
de176489 | 1827 | if (map_groups__create_kernel_maps(&self->kmaps, self->vmlinux_maps, |
75be6cf4 | 1828 | symbol_conf.vmlinux_name) < 0) |
cc612d81 | 1829 | return -1; |
cc612d81 | 1830 | |
75be6cf4 ACM |
1831 | if (symbol_conf.use_modules && |
1832 | perf_session__create_module_maps(self) < 0) | |
4aa65636 ACM |
1833 | pr_debug("Failed to load list of modules for session %s, " |
1834 | "continuing...\n", self->filename); | |
90c83218 ACM |
1835 | /* |
1836 | * Now that we have all the maps created, just set the ->end of them: | |
1837 | */ | |
4aa65636 | 1838 | map_groups__fixup_end(&self->kmaps); |
6671cb16 | 1839 | return 0; |
cd84c2ac | 1840 | } |