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Commit | Line | Data |
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bda6ee4a | 1 | #include <asm/bug.h> |
c6580451 JO |
2 | #include <sys/time.h> |
3 | #include <sys/resource.h> | |
cdd059d7 JO |
4 | #include "symbol.h" |
5 | #include "dso.h" | |
69d2591a | 6 | #include "machine.h" |
cdd059d7 JO |
7 | #include "util.h" |
8 | #include "debug.h" | |
9 | ||
10 | char dso__symtab_origin(const struct dso *dso) | |
11 | { | |
12 | static const char origin[] = { | |
9cd00941 RRD |
13 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
14 | [DSO_BINARY_TYPE__VMLINUX] = 'v', | |
15 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
16 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
17 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
18 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', | |
19 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
20 | [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', | |
21 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
22 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
23 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
24 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', | |
25 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
26 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', | |
cdd059d7 JO |
27 | }; |
28 | ||
29 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
30 | return '!'; | |
31 | return origin[dso->symtab_type]; | |
32 | } | |
33 | ||
ee4e9625 ACM |
34 | int dso__read_binary_type_filename(const struct dso *dso, |
35 | enum dso_binary_type type, | |
36 | char *root_dir, char *filename, size_t size) | |
cdd059d7 JO |
37 | { |
38 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
39 | int ret = 0; | |
972f393b | 40 | size_t len; |
cdd059d7 JO |
41 | |
42 | switch (type) { | |
43 | case DSO_BINARY_TYPE__DEBUGLINK: { | |
44 | char *debuglink; | |
45 | ||
7d2a5122 ACM |
46 | strncpy(filename, dso->long_name, size); |
47 | debuglink = filename + dso->long_name_len; | |
48 | while (debuglink != filename && *debuglink != '/') | |
cdd059d7 JO |
49 | debuglink--; |
50 | if (*debuglink == '/') | |
51 | debuglink++; | |
0d3dc5e8 SE |
52 | ret = filename__read_debuglink(dso->long_name, debuglink, |
53 | size - (debuglink - filename)); | |
cdd059d7 JO |
54 | } |
55 | break; | |
56 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
57 | /* skip the locally configured cache if a symfs is given */ | |
58 | if (symbol_conf.symfs[0] || | |
7d2a5122 | 59 | (dso__build_id_filename(dso, filename, size) == NULL)) |
cdd059d7 JO |
60 | ret = -1; |
61 | break; | |
62 | ||
63 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
972f393b ACM |
64 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
65 | snprintf(filename + len, size - len, "%s.debug", dso->long_name); | |
cdd059d7 JO |
66 | break; |
67 | ||
68 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
972f393b ACM |
69 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
70 | snprintf(filename + len, size - len, "%s", dso->long_name); | |
cdd059d7 JO |
71 | break; |
72 | ||
9cd00941 RRD |
73 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
74 | { | |
bf4414ae | 75 | const char *last_slash; |
9cd00941 RRD |
76 | size_t dir_size; |
77 | ||
78 | last_slash = dso->long_name + dso->long_name_len; | |
79 | while (last_slash != dso->long_name && *last_slash != '/') | |
80 | last_slash--; | |
81 | ||
972f393b | 82 | len = __symbol__join_symfs(filename, size, ""); |
9cd00941 RRD |
83 | dir_size = last_slash - dso->long_name + 2; |
84 | if (dir_size > (size - len)) { | |
85 | ret = -1; | |
86 | break; | |
87 | } | |
7d2a5122 ACM |
88 | len += scnprintf(filename + len, dir_size, "%s", dso->long_name); |
89 | len += scnprintf(filename + len , size - len, ".debug%s", | |
9cd00941 RRD |
90 | last_slash); |
91 | break; | |
92 | } | |
93 | ||
cdd059d7 JO |
94 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
95 | if (!dso->has_build_id) { | |
96 | ret = -1; | |
97 | break; | |
98 | } | |
99 | ||
100 | build_id__sprintf(dso->build_id, | |
101 | sizeof(dso->build_id), | |
102 | build_id_hex); | |
972f393b ACM |
103 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); |
104 | snprintf(filename + len, size - len, "%.2s/%s.debug", | |
105 | build_id_hex, build_id_hex + 2); | |
cdd059d7 JO |
106 | break; |
107 | ||
39b12f78 AH |
108 | case DSO_BINARY_TYPE__VMLINUX: |
109 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
cdd059d7 | 110 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
972f393b | 111 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
112 | break; |
113 | ||
114 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
972f393b ACM |
115 | path__join3(filename, size, symbol_conf.symfs, |
116 | root_dir, dso->long_name); | |
cdd059d7 JO |
117 | break; |
118 | ||
119 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
972f393b | 120 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
121 | break; |
122 | ||
8e0cf965 AH |
123 | case DSO_BINARY_TYPE__KCORE: |
124 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
7d2a5122 | 125 | snprintf(filename, size, "%s", dso->long_name); |
8e0cf965 AH |
126 | break; |
127 | ||
cdd059d7 JO |
128 | default: |
129 | case DSO_BINARY_TYPE__KALLSYMS: | |
cdd059d7 | 130 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
cdd059d7 JO |
131 | case DSO_BINARY_TYPE__JAVA_JIT: |
132 | case DSO_BINARY_TYPE__NOT_FOUND: | |
133 | ret = -1; | |
134 | break; | |
135 | } | |
136 | ||
137 | return ret; | |
138 | } | |
139 | ||
eba5102d | 140 | /* |
bda6ee4a | 141 | * Global list of open DSOs and the counter. |
eba5102d JO |
142 | */ |
143 | static LIST_HEAD(dso__data_open); | |
bda6ee4a | 144 | static long dso__data_open_cnt; |
eba5102d JO |
145 | |
146 | static void dso__list_add(struct dso *dso) | |
147 | { | |
148 | list_add_tail(&dso->data.open_entry, &dso__data_open); | |
bda6ee4a | 149 | dso__data_open_cnt++; |
eba5102d JO |
150 | } |
151 | ||
152 | static void dso__list_del(struct dso *dso) | |
153 | { | |
154 | list_del(&dso->data.open_entry); | |
bda6ee4a JO |
155 | WARN_ONCE(dso__data_open_cnt <= 0, |
156 | "DSO data fd counter out of bounds."); | |
157 | dso__data_open_cnt--; | |
eba5102d JO |
158 | } |
159 | ||
a08cae03 JO |
160 | static void close_first_dso(void); |
161 | ||
162 | static int do_open(char *name) | |
163 | { | |
164 | int fd; | |
6e81c74c | 165 | char sbuf[STRERR_BUFSIZE]; |
a08cae03 JO |
166 | |
167 | do { | |
168 | fd = open(name, O_RDONLY); | |
169 | if (fd >= 0) | |
170 | return fd; | |
171 | ||
6e81c74c MH |
172 | pr_debug("dso open failed, mmap: %s\n", |
173 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
a08cae03 JO |
174 | if (!dso__data_open_cnt || errno != EMFILE) |
175 | break; | |
176 | ||
177 | close_first_dso(); | |
178 | } while (1); | |
179 | ||
180 | return -1; | |
181 | } | |
182 | ||
eba5102d | 183 | static int __open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 184 | { |
cdd059d7 | 185 | int fd; |
ee4e9625 ACM |
186 | char *root_dir = (char *)""; |
187 | char *name = malloc(PATH_MAX); | |
cdd059d7 | 188 | |
cdd059d7 JO |
189 | if (!name) |
190 | return -ENOMEM; | |
191 | ||
192 | if (machine) | |
193 | root_dir = machine->root_dir; | |
194 | ||
5f70619d | 195 | if (dso__read_binary_type_filename(dso, dso->binary_type, |
ee4e9625 | 196 | root_dir, name, PATH_MAX)) { |
cdd059d7 JO |
197 | free(name); |
198 | return -EINVAL; | |
199 | } | |
200 | ||
a08cae03 | 201 | fd = do_open(name); |
cdd059d7 JO |
202 | free(name); |
203 | return fd; | |
204 | } | |
205 | ||
c6580451 JO |
206 | static void check_data_close(void); |
207 | ||
c1f9aa0a JO |
208 | /** |
209 | * dso_close - Open DSO data file | |
210 | * @dso: dso object | |
211 | * | |
212 | * Open @dso's data file descriptor and updates | |
213 | * list/count of open DSO objects. | |
214 | */ | |
eba5102d JO |
215 | static int open_dso(struct dso *dso, struct machine *machine) |
216 | { | |
217 | int fd = __open_dso(dso, machine); | |
218 | ||
a6f6ae99 | 219 | if (fd >= 0) { |
eba5102d | 220 | dso__list_add(dso); |
c6580451 JO |
221 | /* |
222 | * Check if we crossed the allowed number | |
223 | * of opened DSOs and close one if needed. | |
224 | */ | |
225 | check_data_close(); | |
226 | } | |
eba5102d JO |
227 | |
228 | return fd; | |
229 | } | |
230 | ||
231 | static void close_data_fd(struct dso *dso) | |
53fa8eaa JO |
232 | { |
233 | if (dso->data.fd >= 0) { | |
234 | close(dso->data.fd); | |
235 | dso->data.fd = -1; | |
c3fbd2a6 | 236 | dso->data.file_size = 0; |
eba5102d | 237 | dso__list_del(dso); |
53fa8eaa JO |
238 | } |
239 | } | |
240 | ||
c1f9aa0a JO |
241 | /** |
242 | * dso_close - Close DSO data file | |
243 | * @dso: dso object | |
244 | * | |
245 | * Close @dso's data file descriptor and updates | |
246 | * list/count of open DSO objects. | |
247 | */ | |
eba5102d JO |
248 | static void close_dso(struct dso *dso) |
249 | { | |
250 | close_data_fd(dso); | |
251 | } | |
252 | ||
c6580451 JO |
253 | static void close_first_dso(void) |
254 | { | |
255 | struct dso *dso; | |
256 | ||
257 | dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); | |
258 | close_dso(dso); | |
259 | } | |
260 | ||
261 | static rlim_t get_fd_limit(void) | |
262 | { | |
263 | struct rlimit l; | |
264 | rlim_t limit = 0; | |
265 | ||
266 | /* Allow half of the current open fd limit. */ | |
267 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
268 | if (l.rlim_cur == RLIM_INFINITY) | |
269 | limit = l.rlim_cur; | |
270 | else | |
271 | limit = l.rlim_cur / 2; | |
272 | } else { | |
273 | pr_err("failed to get fd limit\n"); | |
274 | limit = 1; | |
275 | } | |
276 | ||
277 | return limit; | |
278 | } | |
279 | ||
280 | static bool may_cache_fd(void) | |
281 | { | |
282 | static rlim_t limit; | |
283 | ||
284 | if (!limit) | |
285 | limit = get_fd_limit(); | |
286 | ||
287 | if (limit == RLIM_INFINITY) | |
288 | return true; | |
289 | ||
290 | return limit > (rlim_t) dso__data_open_cnt; | |
291 | } | |
292 | ||
c1f9aa0a JO |
293 | /* |
294 | * Check and close LRU dso if we crossed allowed limit | |
295 | * for opened dso file descriptors. The limit is half | |
296 | * of the RLIMIT_NOFILE files opened. | |
297 | */ | |
c6580451 JO |
298 | static void check_data_close(void) |
299 | { | |
300 | bool cache_fd = may_cache_fd(); | |
301 | ||
302 | if (!cache_fd) | |
303 | close_first_dso(); | |
304 | } | |
305 | ||
c1f9aa0a JO |
306 | /** |
307 | * dso__data_close - Close DSO data file | |
308 | * @dso: dso object | |
309 | * | |
310 | * External interface to close @dso's data file descriptor. | |
311 | */ | |
eba5102d JO |
312 | void dso__data_close(struct dso *dso) |
313 | { | |
314 | close_dso(dso); | |
315 | } | |
316 | ||
c1f9aa0a JO |
317 | /** |
318 | * dso__data_fd - Get dso's data file descriptor | |
319 | * @dso: dso object | |
320 | * @machine: machine object | |
321 | * | |
322 | * External interface to find dso's file, open it and | |
323 | * returns file descriptor. | |
324 | */ | |
cdd059d7 JO |
325 | int dso__data_fd(struct dso *dso, struct machine *machine) |
326 | { | |
631d34b5 | 327 | enum dso_binary_type binary_type_data[] = { |
cdd059d7 JO |
328 | DSO_BINARY_TYPE__BUILD_ID_CACHE, |
329 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
330 | DSO_BINARY_TYPE__NOT_FOUND, | |
331 | }; | |
332 | int i = 0; | |
333 | ||
c27697d6 AH |
334 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
335 | return -1; | |
336 | ||
53fa8eaa | 337 | if (dso->data.fd >= 0) |
c27697d6 | 338 | goto out; |
53fa8eaa JO |
339 | |
340 | if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { | |
341 | dso->data.fd = open_dso(dso, machine); | |
c27697d6 | 342 | goto out; |
53fa8eaa | 343 | } |
cdd059d7 JO |
344 | |
345 | do { | |
5f70619d | 346 | dso->binary_type = binary_type_data[i++]; |
cdd059d7 | 347 | |
c27697d6 AH |
348 | dso->data.fd = open_dso(dso, machine); |
349 | if (dso->data.fd >= 0) | |
350 | goto out; | |
cdd059d7 | 351 | |
5f70619d | 352 | } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); |
c27697d6 AH |
353 | out: |
354 | if (dso->data.fd >= 0) | |
355 | dso->data.status = DSO_DATA_STATUS_OK; | |
356 | else | |
357 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
cdd059d7 | 358 | |
c27697d6 | 359 | return dso->data.fd; |
cdd059d7 JO |
360 | } |
361 | ||
288be943 AH |
362 | bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) |
363 | { | |
364 | u32 flag = 1 << by; | |
365 | ||
366 | if (dso->data.status_seen & flag) | |
367 | return true; | |
368 | ||
369 | dso->data.status_seen |= flag; | |
370 | ||
371 | return false; | |
372 | } | |
373 | ||
cdd059d7 JO |
374 | static void |
375 | dso_cache__free(struct rb_root *root) | |
376 | { | |
377 | struct rb_node *next = rb_first(root); | |
378 | ||
379 | while (next) { | |
380 | struct dso_cache *cache; | |
381 | ||
382 | cache = rb_entry(next, struct dso_cache, rb_node); | |
383 | next = rb_next(&cache->rb_node); | |
384 | rb_erase(&cache->rb_node, root); | |
385 | free(cache); | |
386 | } | |
387 | } | |
388 | ||
3344996e | 389 | static struct dso_cache *dso_cache__find(const struct rb_root *root, u64 offset) |
cdd059d7 | 390 | { |
3344996e ACM |
391 | struct rb_node * const *p = &root->rb_node; |
392 | const struct rb_node *parent = NULL; | |
cdd059d7 JO |
393 | struct dso_cache *cache; |
394 | ||
395 | while (*p != NULL) { | |
396 | u64 end; | |
397 | ||
398 | parent = *p; | |
399 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
400 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
401 | ||
402 | if (offset < cache->offset) | |
403 | p = &(*p)->rb_left; | |
404 | else if (offset >= end) | |
405 | p = &(*p)->rb_right; | |
406 | else | |
407 | return cache; | |
408 | } | |
409 | return NULL; | |
410 | } | |
411 | ||
412 | static void | |
413 | dso_cache__insert(struct rb_root *root, struct dso_cache *new) | |
414 | { | |
415 | struct rb_node **p = &root->rb_node; | |
416 | struct rb_node *parent = NULL; | |
417 | struct dso_cache *cache; | |
418 | u64 offset = new->offset; | |
419 | ||
420 | while (*p != NULL) { | |
421 | u64 end; | |
422 | ||
423 | parent = *p; | |
424 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
425 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
426 | ||
427 | if (offset < cache->offset) | |
428 | p = &(*p)->rb_left; | |
429 | else if (offset >= end) | |
430 | p = &(*p)->rb_right; | |
431 | } | |
432 | ||
433 | rb_link_node(&new->rb_node, parent, p); | |
434 | rb_insert_color(&new->rb_node, root); | |
435 | } | |
436 | ||
437 | static ssize_t | |
438 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
439 | u8 *data, u64 size) | |
440 | { | |
441 | u64 cache_offset = offset - cache->offset; | |
442 | u64 cache_size = min(cache->size - cache_offset, size); | |
443 | ||
444 | memcpy(data, cache->data + cache_offset, cache_size); | |
445 | return cache_size; | |
446 | } | |
447 | ||
448 | static ssize_t | |
c3fbd2a6 | 449 | dso_cache__read(struct dso *dso, u64 offset, u8 *data, ssize_t size) |
cdd059d7 JO |
450 | { |
451 | struct dso_cache *cache; | |
452 | ssize_t ret; | |
cdd059d7 JO |
453 | |
454 | do { | |
455 | u64 cache_offset; | |
456 | ||
457 | ret = -ENOMEM; | |
458 | ||
459 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); | |
460 | if (!cache) | |
461 | break; | |
462 | ||
463 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
464 | ret = -EINVAL; | |
465 | ||
c3fbd2a6 | 466 | if (-1 == lseek(dso->data.fd, cache_offset, SEEK_SET)) |
cdd059d7 JO |
467 | break; |
468 | ||
c3fbd2a6 | 469 | ret = read(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE); |
cdd059d7 JO |
470 | if (ret <= 0) |
471 | break; | |
472 | ||
473 | cache->offset = cache_offset; | |
474 | cache->size = ret; | |
ca40e2af | 475 | dso_cache__insert(&dso->data.cache, cache); |
cdd059d7 JO |
476 | |
477 | ret = dso_cache__memcpy(cache, offset, data, size); | |
478 | ||
479 | } while (0); | |
480 | ||
481 | if (ret <= 0) | |
482 | free(cache); | |
483 | ||
cdd059d7 JO |
484 | return ret; |
485 | } | |
486 | ||
c3fbd2a6 JO |
487 | static ssize_t dso_cache_read(struct dso *dso, u64 offset, |
488 | u8 *data, ssize_t size) | |
cdd059d7 JO |
489 | { |
490 | struct dso_cache *cache; | |
491 | ||
ca40e2af | 492 | cache = dso_cache__find(&dso->data.cache, offset); |
cdd059d7 JO |
493 | if (cache) |
494 | return dso_cache__memcpy(cache, offset, data, size); | |
495 | else | |
c3fbd2a6 | 496 | return dso_cache__read(dso, offset, data, size); |
cdd059d7 JO |
497 | } |
498 | ||
c1f9aa0a JO |
499 | /* |
500 | * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks | |
501 | * in the rb_tree. Any read to already cached data is served | |
502 | * by cached data. | |
503 | */ | |
c3fbd2a6 | 504 | static ssize_t cached_read(struct dso *dso, u64 offset, u8 *data, ssize_t size) |
cdd059d7 JO |
505 | { |
506 | ssize_t r = 0; | |
507 | u8 *p = data; | |
508 | ||
509 | do { | |
510 | ssize_t ret; | |
511 | ||
c3fbd2a6 | 512 | ret = dso_cache_read(dso, offset, p, size); |
cdd059d7 JO |
513 | if (ret < 0) |
514 | return ret; | |
515 | ||
516 | /* Reached EOF, return what we have. */ | |
517 | if (!ret) | |
518 | break; | |
519 | ||
520 | BUG_ON(ret > size); | |
521 | ||
522 | r += ret; | |
523 | p += ret; | |
524 | offset += ret; | |
525 | size -= ret; | |
526 | ||
527 | } while (size); | |
528 | ||
529 | return r; | |
530 | } | |
531 | ||
c3fbd2a6 JO |
532 | static int data_file_size(struct dso *dso) |
533 | { | |
534 | struct stat st; | |
6e81c74c | 535 | char sbuf[STRERR_BUFSIZE]; |
c3fbd2a6 JO |
536 | |
537 | if (!dso->data.file_size) { | |
538 | if (fstat(dso->data.fd, &st)) { | |
6e81c74c MH |
539 | pr_err("dso mmap failed, fstat: %s\n", |
540 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
c3fbd2a6 JO |
541 | return -1; |
542 | } | |
543 | dso->data.file_size = st.st_size; | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
6d363459 AH |
549 | /** |
550 | * dso__data_size - Return dso data size | |
551 | * @dso: dso object | |
552 | * @machine: machine object | |
553 | * | |
554 | * Return: dso data size | |
555 | */ | |
556 | off_t dso__data_size(struct dso *dso, struct machine *machine) | |
557 | { | |
558 | int fd; | |
559 | ||
560 | fd = dso__data_fd(dso, machine); | |
561 | if (fd < 0) | |
562 | return fd; | |
563 | ||
564 | if (data_file_size(dso)) | |
565 | return -1; | |
566 | ||
567 | /* For now just estimate dso data size is close to file size */ | |
568 | return dso->data.file_size; | |
569 | } | |
570 | ||
c3fbd2a6 JO |
571 | static ssize_t data_read_offset(struct dso *dso, u64 offset, |
572 | u8 *data, ssize_t size) | |
573 | { | |
574 | if (data_file_size(dso)) | |
575 | return -1; | |
576 | ||
577 | /* Check the offset sanity. */ | |
578 | if (offset > dso->data.file_size) | |
579 | return -1; | |
580 | ||
581 | if (offset + size < offset) | |
582 | return -1; | |
583 | ||
584 | return cached_read(dso, offset, data, size); | |
585 | } | |
586 | ||
c1f9aa0a JO |
587 | /** |
588 | * dso__data_read_offset - Read data from dso file offset | |
589 | * @dso: dso object | |
590 | * @machine: machine object | |
591 | * @offset: file offset | |
592 | * @data: buffer to store data | |
593 | * @size: size of the @data buffer | |
594 | * | |
595 | * External interface to read data from dso file offset. Open | |
596 | * dso data file and use cached_read to get the data. | |
597 | */ | |
c3fbd2a6 JO |
598 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, |
599 | u64 offset, u8 *data, ssize_t size) | |
600 | { | |
601 | if (dso__data_fd(dso, machine) < 0) | |
602 | return -1; | |
603 | ||
604 | return data_read_offset(dso, offset, data, size); | |
605 | } | |
606 | ||
c1f9aa0a JO |
607 | /** |
608 | * dso__data_read_addr - Read data from dso address | |
609 | * @dso: dso object | |
610 | * @machine: machine object | |
611 | * @add: virtual memory address | |
612 | * @data: buffer to store data | |
613 | * @size: size of the @data buffer | |
614 | * | |
615 | * External interface to read data from dso address. | |
616 | */ | |
cdd059d7 JO |
617 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, |
618 | struct machine *machine, u64 addr, | |
619 | u8 *data, ssize_t size) | |
620 | { | |
621 | u64 offset = map->map_ip(map, addr); | |
622 | return dso__data_read_offset(dso, machine, offset, data, size); | |
623 | } | |
624 | ||
625 | struct map *dso__new_map(const char *name) | |
626 | { | |
627 | struct map *map = NULL; | |
628 | struct dso *dso = dso__new(name); | |
629 | ||
630 | if (dso) | |
631 | map = map__new2(0, dso, MAP__FUNCTION); | |
632 | ||
633 | return map; | |
634 | } | |
635 | ||
636 | struct dso *dso__kernel_findnew(struct machine *machine, const char *name, | |
637 | const char *short_name, int dso_type) | |
638 | { | |
639 | /* | |
640 | * The kernel dso could be created by build_id processing. | |
641 | */ | |
642 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
643 | ||
644 | /* | |
645 | * We need to run this in all cases, since during the build_id | |
646 | * processing we had no idea this was the kernel dso. | |
647 | */ | |
648 | if (dso != NULL) { | |
58a98c9c | 649 | dso__set_short_name(dso, short_name, false); |
cdd059d7 JO |
650 | dso->kernel = dso_type; |
651 | } | |
652 | ||
653 | return dso; | |
654 | } | |
655 | ||
4598a0a6 WL |
656 | /* |
657 | * Find a matching entry and/or link current entry to RB tree. | |
658 | * Either one of the dso or name parameter must be non-NULL or the | |
659 | * function will not work. | |
660 | */ | |
661 | static struct dso *dso__findlink_by_longname(struct rb_root *root, | |
662 | struct dso *dso, const char *name) | |
663 | { | |
664 | struct rb_node **p = &root->rb_node; | |
665 | struct rb_node *parent = NULL; | |
666 | ||
667 | if (!name) | |
668 | name = dso->long_name; | |
669 | /* | |
670 | * Find node with the matching name | |
671 | */ | |
672 | while (*p) { | |
673 | struct dso *this = rb_entry(*p, struct dso, rb_node); | |
674 | int rc = strcmp(name, this->long_name); | |
675 | ||
676 | parent = *p; | |
677 | if (rc == 0) { | |
678 | /* | |
679 | * In case the new DSO is a duplicate of an existing | |
680 | * one, print an one-time warning & put the new entry | |
681 | * at the end of the list of duplicates. | |
682 | */ | |
683 | if (!dso || (dso == this)) | |
684 | return this; /* Find matching dso */ | |
685 | /* | |
686 | * The core kernel DSOs may have duplicated long name. | |
687 | * In this case, the short name should be different. | |
688 | * Comparing the short names to differentiate the DSOs. | |
689 | */ | |
690 | rc = strcmp(dso->short_name, this->short_name); | |
691 | if (rc == 0) { | |
692 | pr_err("Duplicated dso name: %s\n", name); | |
693 | return NULL; | |
694 | } | |
695 | } | |
696 | if (rc < 0) | |
697 | p = &parent->rb_left; | |
698 | else | |
699 | p = &parent->rb_right; | |
700 | } | |
701 | if (dso) { | |
702 | /* Add new node and rebalance tree */ | |
703 | rb_link_node(&dso->rb_node, parent, p); | |
704 | rb_insert_color(&dso->rb_node, root); | |
705 | } | |
706 | return NULL; | |
707 | } | |
708 | ||
709 | static inline struct dso * | |
710 | dso__find_by_longname(const struct rb_root *root, const char *name) | |
711 | { | |
712 | return dso__findlink_by_longname((struct rb_root *)root, NULL, name); | |
713 | } | |
714 | ||
bf4414ae | 715 | void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
716 | { |
717 | if (name == NULL) | |
718 | return; | |
7e155d4d ACM |
719 | |
720 | if (dso->long_name_allocated) | |
bf4414ae | 721 | free((char *)dso->long_name); |
7e155d4d ACM |
722 | |
723 | dso->long_name = name; | |
724 | dso->long_name_len = strlen(name); | |
725 | dso->long_name_allocated = name_allocated; | |
cdd059d7 JO |
726 | } |
727 | ||
58a98c9c | 728 | void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
729 | { |
730 | if (name == NULL) | |
731 | return; | |
58a98c9c AH |
732 | |
733 | if (dso->short_name_allocated) | |
734 | free((char *)dso->short_name); | |
735 | ||
736 | dso->short_name = name; | |
737 | dso->short_name_len = strlen(name); | |
738 | dso->short_name_allocated = name_allocated; | |
cdd059d7 JO |
739 | } |
740 | ||
741 | static void dso__set_basename(struct dso *dso) | |
742 | { | |
ac5e7f84 SE |
743 | /* |
744 | * basename() may modify path buffer, so we must pass | |
745 | * a copy. | |
746 | */ | |
747 | char *base, *lname = strdup(dso->long_name); | |
748 | ||
749 | if (!lname) | |
750 | return; | |
751 | ||
752 | /* | |
753 | * basename() may return a pointer to internal | |
754 | * storage which is reused in subsequent calls | |
755 | * so copy the result. | |
756 | */ | |
757 | base = strdup(basename(lname)); | |
758 | ||
759 | free(lname); | |
760 | ||
761 | if (!base) | |
762 | return; | |
763 | ||
764 | dso__set_short_name(dso, base, true); | |
cdd059d7 JO |
765 | } |
766 | ||
767 | int dso__name_len(const struct dso *dso) | |
768 | { | |
769 | if (!dso) | |
770 | return strlen("[unknown]"); | |
771 | if (verbose) | |
772 | return dso->long_name_len; | |
773 | ||
774 | return dso->short_name_len; | |
775 | } | |
776 | ||
777 | bool dso__loaded(const struct dso *dso, enum map_type type) | |
778 | { | |
779 | return dso->loaded & (1 << type); | |
780 | } | |
781 | ||
782 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) | |
783 | { | |
784 | return dso->sorted_by_name & (1 << type); | |
785 | } | |
786 | ||
787 | void dso__set_sorted_by_name(struct dso *dso, enum map_type type) | |
788 | { | |
789 | dso->sorted_by_name |= (1 << type); | |
790 | } | |
791 | ||
792 | struct dso *dso__new(const char *name) | |
793 | { | |
794 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
795 | ||
796 | if (dso != NULL) { | |
797 | int i; | |
798 | strcpy(dso->name, name); | |
7e155d4d | 799 | dso__set_long_name(dso, dso->name, false); |
58a98c9c | 800 | dso__set_short_name(dso, dso->name, false); |
cdd059d7 JO |
801 | for (i = 0; i < MAP__NR_TYPES; ++i) |
802 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; | |
ca40e2af | 803 | dso->data.cache = RB_ROOT; |
53fa8eaa | 804 | dso->data.fd = -1; |
c27697d6 | 805 | dso->data.status = DSO_DATA_STATUS_UNKNOWN; |
cdd059d7 | 806 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
5f70619d | 807 | dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; |
c6d8f2a4 | 808 | dso->is_64_bit = (sizeof(void *) == 8); |
cdd059d7 | 809 | dso->loaded = 0; |
0131c4ec | 810 | dso->rel = 0; |
cdd059d7 JO |
811 | dso->sorted_by_name = 0; |
812 | dso->has_build_id = 0; | |
2cc9d0ef | 813 | dso->has_srcline = 1; |
906049c8 | 814 | dso->a2l_fails = 1; |
cdd059d7 JO |
815 | dso->kernel = DSO_TYPE_USER; |
816 | dso->needs_swap = DSO_SWAP__UNSET; | |
4598a0a6 | 817 | RB_CLEAR_NODE(&dso->rb_node); |
cdd059d7 | 818 | INIT_LIST_HEAD(&dso->node); |
eba5102d | 819 | INIT_LIST_HEAD(&dso->data.open_entry); |
cdd059d7 JO |
820 | } |
821 | ||
822 | return dso; | |
823 | } | |
824 | ||
825 | void dso__delete(struct dso *dso) | |
826 | { | |
827 | int i; | |
4598a0a6 WL |
828 | |
829 | if (!RB_EMPTY_NODE(&dso->rb_node)) | |
830 | pr_err("DSO %s is still in rbtree when being deleted!\n", | |
831 | dso->long_name); | |
cdd059d7 JO |
832 | for (i = 0; i < MAP__NR_TYPES; ++i) |
833 | symbols__delete(&dso->symbols[i]); | |
ee021d42 ACM |
834 | |
835 | if (dso->short_name_allocated) { | |
04662523 | 836 | zfree((char **)&dso->short_name); |
ee021d42 ACM |
837 | dso->short_name_allocated = false; |
838 | } | |
839 | ||
840 | if (dso->long_name_allocated) { | |
04662523 | 841 | zfree((char **)&dso->long_name); |
ee021d42 ACM |
842 | dso->long_name_allocated = false; |
843 | } | |
844 | ||
53fa8eaa | 845 | dso__data_close(dso); |
ca40e2af | 846 | dso_cache__free(&dso->data.cache); |
454ff00f | 847 | dso__free_a2l(dso); |
04662523 | 848 | zfree(&dso->symsrc_filename); |
cdd059d7 JO |
849 | free(dso); |
850 | } | |
851 | ||
852 | void dso__set_build_id(struct dso *dso, void *build_id) | |
853 | { | |
854 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
855 | dso->has_build_id = 1; | |
856 | } | |
857 | ||
858 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
859 | { | |
860 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
861 | } | |
862 | ||
863 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
864 | { | |
865 | char path[PATH_MAX]; | |
866 | ||
867 | if (machine__is_default_guest(machine)) | |
868 | return; | |
869 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
870 | if (sysfs__read_build_id(path, dso->build_id, | |
871 | sizeof(dso->build_id)) == 0) | |
872 | dso->has_build_id = true; | |
873 | } | |
874 | ||
875 | int dso__kernel_module_get_build_id(struct dso *dso, | |
876 | const char *root_dir) | |
877 | { | |
878 | char filename[PATH_MAX]; | |
879 | /* | |
880 | * kernel module short names are of the form "[module]" and | |
881 | * we need just "module" here. | |
882 | */ | |
883 | const char *name = dso->short_name + 1; | |
884 | ||
885 | snprintf(filename, sizeof(filename), | |
886 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
887 | root_dir, (int)strlen(name) - 1, name); | |
888 | ||
889 | if (sysfs__read_build_id(filename, dso->build_id, | |
890 | sizeof(dso->build_id)) == 0) | |
891 | dso->has_build_id = true; | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
897 | { | |
898 | bool have_build_id = false; | |
899 | struct dso *pos; | |
900 | ||
901 | list_for_each_entry(pos, head, node) { | |
902 | if (with_hits && !pos->hit) | |
903 | continue; | |
904 | if (pos->has_build_id) { | |
905 | have_build_id = true; | |
906 | continue; | |
907 | } | |
908 | if (filename__read_build_id(pos->long_name, pos->build_id, | |
909 | sizeof(pos->build_id)) > 0) { | |
910 | have_build_id = true; | |
911 | pos->has_build_id = true; | |
912 | } | |
913 | } | |
914 | ||
915 | return have_build_id; | |
916 | } | |
917 | ||
8fa7d87f | 918 | void dsos__add(struct dsos *dsos, struct dso *dso) |
cdd059d7 | 919 | { |
8fa7d87f | 920 | list_add_tail(&dso->node, &dsos->head); |
4598a0a6 | 921 | dso__findlink_by_longname(&dsos->root, dso, NULL); |
cdd059d7 JO |
922 | } |
923 | ||
8fa7d87f WL |
924 | struct dso *dsos__find(const struct dsos *dsos, const char *name, |
925 | bool cmp_short) | |
cdd059d7 JO |
926 | { |
927 | struct dso *pos; | |
928 | ||
f9ceffb6 | 929 | if (cmp_short) { |
8fa7d87f | 930 | list_for_each_entry(pos, &dsos->head, node) |
f9ceffb6 WL |
931 | if (strcmp(pos->short_name, name) == 0) |
932 | return pos; | |
933 | return NULL; | |
934 | } | |
4598a0a6 | 935 | return dso__find_by_longname(&dsos->root, name); |
cdd059d7 JO |
936 | } |
937 | ||
8fa7d87f | 938 | struct dso *__dsos__findnew(struct dsos *dsos, const char *name) |
cdd059d7 | 939 | { |
8fa7d87f | 940 | struct dso *dso = dsos__find(dsos, name, false); |
cdd059d7 JO |
941 | |
942 | if (!dso) { | |
943 | dso = dso__new(name); | |
944 | if (dso != NULL) { | |
8fa7d87f | 945 | dsos__add(dsos, dso); |
cdd059d7 JO |
946 | dso__set_basename(dso); |
947 | } | |
948 | } | |
949 | ||
950 | return dso; | |
951 | } | |
952 | ||
953 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, | |
417c2ff6 | 954 | bool (skip)(struct dso *dso, int parm), int parm) |
cdd059d7 JO |
955 | { |
956 | struct dso *pos; | |
957 | size_t ret = 0; | |
958 | ||
959 | list_for_each_entry(pos, head, node) { | |
417c2ff6 | 960 | if (skip && skip(pos, parm)) |
cdd059d7 JO |
961 | continue; |
962 | ret += dso__fprintf_buildid(pos, fp); | |
963 | ret += fprintf(fp, " %s\n", pos->long_name); | |
964 | } | |
965 | return ret; | |
966 | } | |
967 | ||
968 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
969 | { | |
970 | struct dso *pos; | |
971 | size_t ret = 0; | |
972 | ||
973 | list_for_each_entry(pos, head, node) { | |
974 | int i; | |
975 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
976 | ret += dso__fprintf(pos, i, fp); | |
977 | } | |
978 | ||
979 | return ret; | |
980 | } | |
981 | ||
982 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
983 | { | |
984 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
985 | ||
986 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
987 | return fprintf(fp, "%s", sbuild_id); | |
988 | } | |
989 | ||
990 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) | |
991 | { | |
992 | struct rb_node *nd; | |
993 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
994 | ||
995 | if (dso->short_name != dso->long_name) | |
996 | ret += fprintf(fp, "%s, ", dso->long_name); | |
997 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
919d590f | 998 | dso__loaded(dso, type) ? "" : "NOT "); |
cdd059d7 JO |
999 | ret += dso__fprintf_buildid(dso, fp); |
1000 | ret += fprintf(fp, ")\n"); | |
1001 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { | |
1002 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
1003 | ret += symbol__fprintf(pos, fp); | |
1004 | } | |
1005 | ||
1006 | return ret; | |
1007 | } | |
2b5b8bb2 AH |
1008 | |
1009 | enum dso_type dso__type(struct dso *dso, struct machine *machine) | |
1010 | { | |
1011 | int fd; | |
1012 | ||
1013 | fd = dso__data_fd(dso, machine); | |
1014 | if (fd < 0) | |
1015 | return DSO__TYPE_UNKNOWN; | |
1016 | ||
1017 | return dso__type_fd(fd); | |
1018 | } |