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1#include "symbol.h"
2#include "dso.h"
3#include "machine.h"
4#include "util.h"
5#include "debug.h"
6
7char dso__symtab_origin(const struct dso *dso)
8{
9 static const char origin[] = {
10 [DSO_BINARY_TYPE__KALLSYMS] = 'k',
11 [DSO_BINARY_TYPE__VMLINUX] = 'v',
12 [DSO_BINARY_TYPE__JAVA_JIT] = 'j',
13 [DSO_BINARY_TYPE__DEBUGLINK] = 'l',
14 [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B',
15 [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f',
16 [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u',
17 [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o',
18 [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b',
19 [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd',
20 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K',
21 [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g',
22 [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G',
23 [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V',
24 };
25
26 if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
27 return '!';
28 return origin[dso->symtab_type];
29}
30
31int dso__read_binary_type_filename(const struct dso *dso,
32 enum dso_binary_type type,
33 char *root_dir, char *filename, size_t size)
34{
35 char build_id_hex[BUILD_ID_SIZE * 2 + 1];
36 int ret = 0;
37
38 switch (type) {
39 case DSO_BINARY_TYPE__DEBUGLINK: {
40 char *debuglink;
41
42 strncpy(filename, dso->long_name, size);
43 debuglink = filename + dso->long_name_len;
44 while (debuglink != filename && *debuglink != '/')
45 debuglink--;
46 if (*debuglink == '/')
47 debuglink++;
48 ret = filename__read_debuglink(dso->long_name, debuglink,
49 size - (debuglink - filename));
50 }
51 break;
52 case DSO_BINARY_TYPE__BUILD_ID_CACHE:
53 /* skip the locally configured cache if a symfs is given */
54 if (symbol_conf.symfs[0] ||
55 (dso__build_id_filename(dso, filename, size) == NULL))
56 ret = -1;
57 break;
58
59 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
60 snprintf(filename, size, "%s/usr/lib/debug%s.debug",
61 symbol_conf.symfs, dso->long_name);
62 break;
63
64 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
65 snprintf(filename, size, "%s/usr/lib/debug%s",
66 symbol_conf.symfs, dso->long_name);
67 break;
68
69 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
70 {
71 const char *last_slash;
72 size_t len;
73 size_t dir_size;
74
75 last_slash = dso->long_name + dso->long_name_len;
76 while (last_slash != dso->long_name && *last_slash != '/')
77 last_slash--;
78
79 len = scnprintf(filename, size, "%s", symbol_conf.symfs);
80 dir_size = last_slash - dso->long_name + 2;
81 if (dir_size > (size - len)) {
82 ret = -1;
83 break;
84 }
85 len += scnprintf(filename + len, dir_size, "%s", dso->long_name);
86 len += scnprintf(filename + len , size - len, ".debug%s",
87 last_slash);
88 break;
89 }
90
91 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
92 if (!dso->has_build_id) {
93 ret = -1;
94 break;
95 }
96
97 build_id__sprintf(dso->build_id,
98 sizeof(dso->build_id),
99 build_id_hex);
100 snprintf(filename, size,
101 "%s/usr/lib/debug/.build-id/%.2s/%s.debug",
102 symbol_conf.symfs, build_id_hex, build_id_hex + 2);
103 break;
104
105 case DSO_BINARY_TYPE__VMLINUX:
106 case DSO_BINARY_TYPE__GUEST_VMLINUX:
107 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
108 snprintf(filename, size, "%s%s",
109 symbol_conf.symfs, dso->long_name);
110 break;
111
112 case DSO_BINARY_TYPE__GUEST_KMODULE:
113 snprintf(filename, size, "%s%s%s", symbol_conf.symfs,
114 root_dir, dso->long_name);
115 break;
116
117 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
118 snprintf(filename, size, "%s%s", symbol_conf.symfs,
119 dso->long_name);
120 break;
121
122 case DSO_BINARY_TYPE__KCORE:
123 case DSO_BINARY_TYPE__GUEST_KCORE:
124 snprintf(filename, size, "%s", dso->long_name);
125 break;
126
127 default:
128 case DSO_BINARY_TYPE__KALLSYMS:
129 case DSO_BINARY_TYPE__GUEST_KALLSYMS:
130 case DSO_BINARY_TYPE__JAVA_JIT:
131 case DSO_BINARY_TYPE__NOT_FOUND:
132 ret = -1;
133 break;
134 }
135
136 return ret;
137}
138
139static int open_dso(struct dso *dso, struct machine *machine)
140{
141 int fd;
142 char *root_dir = (char *)"";
143 char *name = malloc(PATH_MAX);
144
145 if (!name)
146 return -ENOMEM;
147
148 if (machine)
149 root_dir = machine->root_dir;
150
151 if (dso__read_binary_type_filename(dso, dso->binary_type,
152 root_dir, name, PATH_MAX)) {
153 free(name);
154 return -EINVAL;
155 }
156
157 fd = open(name, O_RDONLY);
158 free(name);
159 return fd;
160}
161
162int dso__data_fd(struct dso *dso, struct machine *machine)
163{
164 enum dso_binary_type binary_type_data[] = {
165 DSO_BINARY_TYPE__BUILD_ID_CACHE,
166 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
167 DSO_BINARY_TYPE__NOT_FOUND,
168 };
169 int i = 0;
170
171 if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND)
172 return open_dso(dso, machine);
173
174 do {
175 int fd;
176
177 dso->binary_type = binary_type_data[i++];
178
179 fd = open_dso(dso, machine);
180 if (fd >= 0)
181 return fd;
182
183 } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
184
185 return -EINVAL;
186}
187
188static void
189dso_cache__free(struct rb_root *root)
190{
191 struct rb_node *next = rb_first(root);
192
193 while (next) {
194 struct dso_cache *cache;
195
196 cache = rb_entry(next, struct dso_cache, rb_node);
197 next = rb_next(&cache->rb_node);
198 rb_erase(&cache->rb_node, root);
199 free(cache);
200 }
201}
202
203static struct dso_cache *dso_cache__find(const struct rb_root *root, u64 offset)
204{
205 struct rb_node * const *p = &root->rb_node;
206 const struct rb_node *parent = NULL;
207 struct dso_cache *cache;
208
209 while (*p != NULL) {
210 u64 end;
211
212 parent = *p;
213 cache = rb_entry(parent, struct dso_cache, rb_node);
214 end = cache->offset + DSO__DATA_CACHE_SIZE;
215
216 if (offset < cache->offset)
217 p = &(*p)->rb_left;
218 else if (offset >= end)
219 p = &(*p)->rb_right;
220 else
221 return cache;
222 }
223 return NULL;
224}
225
226static void
227dso_cache__insert(struct rb_root *root, struct dso_cache *new)
228{
229 struct rb_node **p = &root->rb_node;
230 struct rb_node *parent = NULL;
231 struct dso_cache *cache;
232 u64 offset = new->offset;
233
234 while (*p != NULL) {
235 u64 end;
236
237 parent = *p;
238 cache = rb_entry(parent, struct dso_cache, rb_node);
239 end = cache->offset + DSO__DATA_CACHE_SIZE;
240
241 if (offset < cache->offset)
242 p = &(*p)->rb_left;
243 else if (offset >= end)
244 p = &(*p)->rb_right;
245 }
246
247 rb_link_node(&new->rb_node, parent, p);
248 rb_insert_color(&new->rb_node, root);
249}
250
251static ssize_t
252dso_cache__memcpy(struct dso_cache *cache, u64 offset,
253 u8 *data, u64 size)
254{
255 u64 cache_offset = offset - cache->offset;
256 u64 cache_size = min(cache->size - cache_offset, size);
257
258 memcpy(data, cache->data + cache_offset, cache_size);
259 return cache_size;
260}
261
262static ssize_t
263dso_cache__read(struct dso *dso, struct machine *machine,
264 u64 offset, u8 *data, ssize_t size)
265{
266 struct dso_cache *cache;
267 ssize_t ret;
268 int fd;
269
270 fd = dso__data_fd(dso, machine);
271 if (fd < 0)
272 return -1;
273
274 do {
275 u64 cache_offset;
276
277 ret = -ENOMEM;
278
279 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
280 if (!cache)
281 break;
282
283 cache_offset = offset & DSO__DATA_CACHE_MASK;
284 ret = -EINVAL;
285
286 if (-1 == lseek(fd, cache_offset, SEEK_SET))
287 break;
288
289 ret = read(fd, cache->data, DSO__DATA_CACHE_SIZE);
290 if (ret <= 0)
291 break;
292
293 cache->offset = cache_offset;
294 cache->size = ret;
295 dso_cache__insert(&dso->cache, cache);
296
297 ret = dso_cache__memcpy(cache, offset, data, size);
298
299 } while (0);
300
301 if (ret <= 0)
302 free(cache);
303
304 close(fd);
305 return ret;
306}
307
308static ssize_t dso_cache_read(struct dso *dso, struct machine *machine,
309 u64 offset, u8 *data, ssize_t size)
310{
311 struct dso_cache *cache;
312
313 cache = dso_cache__find(&dso->cache, offset);
314 if (cache)
315 return dso_cache__memcpy(cache, offset, data, size);
316 else
317 return dso_cache__read(dso, machine, offset, data, size);
318}
319
320ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
321 u64 offset, u8 *data, ssize_t size)
322{
323 ssize_t r = 0;
324 u8 *p = data;
325
326 do {
327 ssize_t ret;
328
329 ret = dso_cache_read(dso, machine, offset, p, size);
330 if (ret < 0)
331 return ret;
332
333 /* Reached EOF, return what we have. */
334 if (!ret)
335 break;
336
337 BUG_ON(ret > size);
338
339 r += ret;
340 p += ret;
341 offset += ret;
342 size -= ret;
343
344 } while (size);
345
346 return r;
347}
348
349ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
350 struct machine *machine, u64 addr,
351 u8 *data, ssize_t size)
352{
353 u64 offset = map->map_ip(map, addr);
354 return dso__data_read_offset(dso, machine, offset, data, size);
355}
356
357struct map *dso__new_map(const char *name)
358{
359 struct map *map = NULL;
360 struct dso *dso = dso__new(name);
361
362 if (dso)
363 map = map__new2(0, dso, MAP__FUNCTION);
364
365 return map;
366}
367
368struct dso *dso__kernel_findnew(struct machine *machine, const char *name,
369 const char *short_name, int dso_type)
370{
371 /*
372 * The kernel dso could be created by build_id processing.
373 */
374 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name);
375
376 /*
377 * We need to run this in all cases, since during the build_id
378 * processing we had no idea this was the kernel dso.
379 */
380 if (dso != NULL) {
381 dso__set_short_name(dso, short_name, false);
382 dso->kernel = dso_type;
383 }
384
385 return dso;
386}
387
388void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
389{
390 if (name == NULL)
391 return;
392
393 if (dso->long_name_allocated)
394 free((char *)dso->long_name);
395
396 dso->long_name = name;
397 dso->long_name_len = strlen(name);
398 dso->long_name_allocated = name_allocated;
399}
400
401void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
402{
403 if (name == NULL)
404 return;
405
406 if (dso->short_name_allocated)
407 free((char *)dso->short_name);
408
409 dso->short_name = name;
410 dso->short_name_len = strlen(name);
411 dso->short_name_allocated = name_allocated;
412}
413
414static void dso__set_basename(struct dso *dso)
415{
416 /*
417 * basename() may modify path buffer, so we must pass
418 * a copy.
419 */
420 char *base, *lname = strdup(dso->long_name);
421
422 if (!lname)
423 return;
424
425 /*
426 * basename() may return a pointer to internal
427 * storage which is reused in subsequent calls
428 * so copy the result.
429 */
430 base = strdup(basename(lname));
431
432 free(lname);
433
434 if (!base)
435 return;
436
437 dso__set_short_name(dso, base, true);
438}
439
440int dso__name_len(const struct dso *dso)
441{
442 if (!dso)
443 return strlen("[unknown]");
444 if (verbose)
445 return dso->long_name_len;
446
447 return dso->short_name_len;
448}
449
450bool dso__loaded(const struct dso *dso, enum map_type type)
451{
452 return dso->loaded & (1 << type);
453}
454
455bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
456{
457 return dso->sorted_by_name & (1 << type);
458}
459
460void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
461{
462 dso->sorted_by_name |= (1 << type);
463}
464
465struct dso *dso__new(const char *name)
466{
467 struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
468
469 if (dso != NULL) {
470 int i;
471 strcpy(dso->name, name);
472 dso__set_long_name(dso, dso->name, false);
473 dso__set_short_name(dso, dso->name, false);
474 for (i = 0; i < MAP__NR_TYPES; ++i)
475 dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
476 dso->cache = RB_ROOT;
477 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
478 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
479 dso->loaded = 0;
480 dso->rel = 0;
481 dso->sorted_by_name = 0;
482 dso->has_build_id = 0;
483 dso->has_srcline = 1;
484 dso->a2l_fails = 1;
485 dso->kernel = DSO_TYPE_USER;
486 dso->needs_swap = DSO_SWAP__UNSET;
487 INIT_LIST_HEAD(&dso->node);
488 }
489
490 return dso;
491}
492
493void dso__delete(struct dso *dso)
494{
495 int i;
496 for (i = 0; i < MAP__NR_TYPES; ++i)
497 symbols__delete(&dso->symbols[i]);
498
499 if (dso->short_name_allocated) {
500 zfree((char **)&dso->short_name);
501 dso->short_name_allocated = false;
502 }
503
504 if (dso->long_name_allocated) {
505 zfree((char **)&dso->long_name);
506 dso->long_name_allocated = false;
507 }
508
509 dso_cache__free(&dso->cache);
510 dso__free_a2l(dso);
511 zfree(&dso->symsrc_filename);
512 free(dso);
513}
514
515void dso__set_build_id(struct dso *dso, void *build_id)
516{
517 memcpy(dso->build_id, build_id, sizeof(dso->build_id));
518 dso->has_build_id = 1;
519}
520
521bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
522{
523 return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
524}
525
526void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
527{
528 char path[PATH_MAX];
529
530 if (machine__is_default_guest(machine))
531 return;
532 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
533 if (sysfs__read_build_id(path, dso->build_id,
534 sizeof(dso->build_id)) == 0)
535 dso->has_build_id = true;
536}
537
538int dso__kernel_module_get_build_id(struct dso *dso,
539 const char *root_dir)
540{
541 char filename[PATH_MAX];
542 /*
543 * kernel module short names are of the form "[module]" and
544 * we need just "module" here.
545 */
546 const char *name = dso->short_name + 1;
547
548 snprintf(filename, sizeof(filename),
549 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
550 root_dir, (int)strlen(name) - 1, name);
551
552 if (sysfs__read_build_id(filename, dso->build_id,
553 sizeof(dso->build_id)) == 0)
554 dso->has_build_id = true;
555
556 return 0;
557}
558
559bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
560{
561 bool have_build_id = false;
562 struct dso *pos;
563
564 list_for_each_entry(pos, head, node) {
565 if (with_hits && !pos->hit)
566 continue;
567 if (pos->has_build_id) {
568 have_build_id = true;
569 continue;
570 }
571 if (filename__read_build_id(pos->long_name, pos->build_id,
572 sizeof(pos->build_id)) > 0) {
573 have_build_id = true;
574 pos->has_build_id = true;
575 }
576 }
577
578 return have_build_id;
579}
580
581void dsos__add(struct list_head *head, struct dso *dso)
582{
583 list_add_tail(&dso->node, head);
584}
585
586struct dso *dsos__find(const struct list_head *head, const char *name, bool cmp_short)
587{
588 struct dso *pos;
589
590 if (cmp_short) {
591 list_for_each_entry(pos, head, node)
592 if (strcmp(pos->short_name, name) == 0)
593 return pos;
594 return NULL;
595 }
596 list_for_each_entry(pos, head, node)
597 if (strcmp(pos->long_name, name) == 0)
598 return pos;
599 return NULL;
600}
601
602struct dso *__dsos__findnew(struct list_head *head, const char *name)
603{
604 struct dso *dso = dsos__find(head, name, false);
605
606 if (!dso) {
607 dso = dso__new(name);
608 if (dso != NULL) {
609 dsos__add(head, dso);
610 dso__set_basename(dso);
611 }
612 }
613
614 return dso;
615}
616
617size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
618 bool (skip)(struct dso *dso, int parm), int parm)
619{
620 struct dso *pos;
621 size_t ret = 0;
622
623 list_for_each_entry(pos, head, node) {
624 if (skip && skip(pos, parm))
625 continue;
626 ret += dso__fprintf_buildid(pos, fp);
627 ret += fprintf(fp, " %s\n", pos->long_name);
628 }
629 return ret;
630}
631
632size_t __dsos__fprintf(struct list_head *head, FILE *fp)
633{
634 struct dso *pos;
635 size_t ret = 0;
636
637 list_for_each_entry(pos, head, node) {
638 int i;
639 for (i = 0; i < MAP__NR_TYPES; ++i)
640 ret += dso__fprintf(pos, i, fp);
641 }
642
643 return ret;
644}
645
646size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
647{
648 char sbuild_id[BUILD_ID_SIZE * 2 + 1];
649
650 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
651 return fprintf(fp, "%s", sbuild_id);
652}
653
654size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
655{
656 struct rb_node *nd;
657 size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
658
659 if (dso->short_name != dso->long_name)
660 ret += fprintf(fp, "%s, ", dso->long_name);
661 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
662 dso__loaded(dso, type) ? "" : "NOT ");
663 ret += dso__fprintf_buildid(dso, fp);
664 ret += fprintf(fp, ")\n");
665 for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
666 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
667 ret += symbol__fprintf(pos, fp);
668 }
669
670 return ret;
671}