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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', | |
c00c48fc | 24 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm', |
9cd00941 RRD |
25 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', |
26 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
c00c48fc | 27 | [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', |
9cd00941 | 28 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', |
cdd059d7 JO |
29 | }; |
30 | ||
31 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
32 | return '!'; | |
33 | return origin[dso->symtab_type]; | |
34 | } | |
35 | ||
ee4e9625 ACM |
36 | int dso__read_binary_type_filename(const struct dso *dso, |
37 | enum dso_binary_type type, | |
38 | char *root_dir, char *filename, size_t size) | |
cdd059d7 JO |
39 | { |
40 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
41 | int ret = 0; | |
972f393b | 42 | size_t len; |
cdd059d7 JO |
43 | |
44 | switch (type) { | |
45 | case DSO_BINARY_TYPE__DEBUGLINK: { | |
46 | char *debuglink; | |
47 | ||
7d2a5122 ACM |
48 | strncpy(filename, dso->long_name, size); |
49 | debuglink = filename + dso->long_name_len; | |
50 | while (debuglink != filename && *debuglink != '/') | |
cdd059d7 JO |
51 | debuglink--; |
52 | if (*debuglink == '/') | |
53 | debuglink++; | |
0d3dc5e8 SE |
54 | ret = filename__read_debuglink(dso->long_name, debuglink, |
55 | size - (debuglink - filename)); | |
cdd059d7 JO |
56 | } |
57 | break; | |
58 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
59 | /* skip the locally configured cache if a symfs is given */ | |
60 | if (symbol_conf.symfs[0] || | |
7d2a5122 | 61 | (dso__build_id_filename(dso, filename, size) == NULL)) |
cdd059d7 JO |
62 | ret = -1; |
63 | break; | |
64 | ||
65 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
972f393b ACM |
66 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
67 | snprintf(filename + len, size - len, "%s.debug", dso->long_name); | |
cdd059d7 JO |
68 | break; |
69 | ||
70 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
972f393b ACM |
71 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
72 | snprintf(filename + len, size - len, "%s", dso->long_name); | |
cdd059d7 JO |
73 | break; |
74 | ||
9cd00941 RRD |
75 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
76 | { | |
bf4414ae | 77 | const char *last_slash; |
9cd00941 RRD |
78 | size_t dir_size; |
79 | ||
80 | last_slash = dso->long_name + dso->long_name_len; | |
81 | while (last_slash != dso->long_name && *last_slash != '/') | |
82 | last_slash--; | |
83 | ||
972f393b | 84 | len = __symbol__join_symfs(filename, size, ""); |
9cd00941 RRD |
85 | dir_size = last_slash - dso->long_name + 2; |
86 | if (dir_size > (size - len)) { | |
87 | ret = -1; | |
88 | break; | |
89 | } | |
7d2a5122 ACM |
90 | len += scnprintf(filename + len, dir_size, "%s", dso->long_name); |
91 | len += scnprintf(filename + len , size - len, ".debug%s", | |
9cd00941 RRD |
92 | last_slash); |
93 | break; | |
94 | } | |
95 | ||
cdd059d7 JO |
96 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
97 | if (!dso->has_build_id) { | |
98 | ret = -1; | |
99 | break; | |
100 | } | |
101 | ||
102 | build_id__sprintf(dso->build_id, | |
103 | sizeof(dso->build_id), | |
104 | build_id_hex); | |
972f393b ACM |
105 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); |
106 | snprintf(filename + len, size - len, "%.2s/%s.debug", | |
107 | build_id_hex, build_id_hex + 2); | |
cdd059d7 JO |
108 | break; |
109 | ||
39b12f78 AH |
110 | case DSO_BINARY_TYPE__VMLINUX: |
111 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
cdd059d7 | 112 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
972f393b | 113 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
114 | break; |
115 | ||
116 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 117 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
972f393b ACM |
118 | path__join3(filename, size, symbol_conf.symfs, |
119 | root_dir, dso->long_name); | |
cdd059d7 JO |
120 | break; |
121 | ||
122 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
c00c48fc | 123 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
972f393b | 124 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
125 | break; |
126 | ||
8e0cf965 AH |
127 | case DSO_BINARY_TYPE__KCORE: |
128 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
7d2a5122 | 129 | snprintf(filename, size, "%s", dso->long_name); |
8e0cf965 AH |
130 | break; |
131 | ||
cdd059d7 JO |
132 | default: |
133 | case DSO_BINARY_TYPE__KALLSYMS: | |
cdd059d7 | 134 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
cdd059d7 JO |
135 | case DSO_BINARY_TYPE__JAVA_JIT: |
136 | case DSO_BINARY_TYPE__NOT_FOUND: | |
137 | ret = -1; | |
138 | break; | |
139 | } | |
140 | ||
141 | return ret; | |
142 | } | |
143 | ||
c00c48fc NK |
144 | static int decompress_dummy(const char *input __maybe_unused, |
145 | int output __maybe_unused) | |
146 | { | |
147 | return -1; | |
148 | } | |
149 | ||
150 | static const struct { | |
151 | const char *fmt; | |
152 | int (*decompress)(const char *input, int output); | |
153 | } compressions[] = { | |
154 | { "gz", decompress_dummy }, | |
155 | { NULL, }, | |
156 | }; | |
157 | ||
158 | bool is_supported_compression(const char *ext) | |
159 | { | |
160 | unsigned i; | |
161 | ||
162 | for (i = 0; compressions[i].fmt; i++) { | |
163 | if (!strcmp(ext, compressions[i].fmt)) | |
164 | return true; | |
165 | } | |
166 | return false; | |
167 | } | |
168 | ||
169 | bool is_kmodule_extension(const char *ext) | |
170 | { | |
171 | if (strncmp(ext, "ko", 2)) | |
172 | return false; | |
173 | ||
174 | if (ext[2] == '\0' || (ext[2] == '.' && is_supported_compression(ext+3))) | |
175 | return true; | |
176 | ||
177 | return false; | |
178 | } | |
179 | ||
180 | bool is_kernel_module(const char *pathname, bool *compressed) | |
181 | { | |
182 | const char *ext = strrchr(pathname, '.'); | |
183 | ||
184 | if (ext == NULL) | |
185 | return false; | |
186 | ||
187 | if (is_supported_compression(ext + 1)) { | |
188 | if (compressed) | |
189 | *compressed = true; | |
190 | ext -= 3; | |
191 | } else if (compressed) | |
192 | *compressed = false; | |
193 | ||
194 | return is_kmodule_extension(ext + 1); | |
195 | } | |
196 | ||
197 | bool decompress_to_file(const char *ext, const char *filename, int output_fd) | |
198 | { | |
199 | unsigned i; | |
200 | ||
201 | for (i = 0; compressions[i].fmt; i++) { | |
202 | if (!strcmp(ext, compressions[i].fmt)) | |
203 | return !compressions[i].decompress(filename, | |
204 | output_fd); | |
205 | } | |
206 | return false; | |
207 | } | |
208 | ||
209 | bool dso__needs_decompress(struct dso *dso) | |
210 | { | |
211 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || | |
212 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
213 | } | |
214 | ||
eba5102d | 215 | /* |
bda6ee4a | 216 | * Global list of open DSOs and the counter. |
eba5102d JO |
217 | */ |
218 | static LIST_HEAD(dso__data_open); | |
bda6ee4a | 219 | static long dso__data_open_cnt; |
eba5102d JO |
220 | |
221 | static void dso__list_add(struct dso *dso) | |
222 | { | |
223 | list_add_tail(&dso->data.open_entry, &dso__data_open); | |
bda6ee4a | 224 | dso__data_open_cnt++; |
eba5102d JO |
225 | } |
226 | ||
227 | static void dso__list_del(struct dso *dso) | |
228 | { | |
229 | list_del(&dso->data.open_entry); | |
bda6ee4a JO |
230 | WARN_ONCE(dso__data_open_cnt <= 0, |
231 | "DSO data fd counter out of bounds."); | |
232 | dso__data_open_cnt--; | |
eba5102d JO |
233 | } |
234 | ||
a08cae03 JO |
235 | static void close_first_dso(void); |
236 | ||
237 | static int do_open(char *name) | |
238 | { | |
239 | int fd; | |
6e81c74c | 240 | char sbuf[STRERR_BUFSIZE]; |
a08cae03 JO |
241 | |
242 | do { | |
243 | fd = open(name, O_RDONLY); | |
244 | if (fd >= 0) | |
245 | return fd; | |
246 | ||
6e81c74c MH |
247 | pr_debug("dso open failed, mmap: %s\n", |
248 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
a08cae03 JO |
249 | if (!dso__data_open_cnt || errno != EMFILE) |
250 | break; | |
251 | ||
252 | close_first_dso(); | |
253 | } while (1); | |
254 | ||
255 | return -1; | |
256 | } | |
257 | ||
eba5102d | 258 | static int __open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 259 | { |
cdd059d7 | 260 | int fd; |
ee4e9625 ACM |
261 | char *root_dir = (char *)""; |
262 | char *name = malloc(PATH_MAX); | |
cdd059d7 | 263 | |
cdd059d7 JO |
264 | if (!name) |
265 | return -ENOMEM; | |
266 | ||
267 | if (machine) | |
268 | root_dir = machine->root_dir; | |
269 | ||
5f70619d | 270 | if (dso__read_binary_type_filename(dso, dso->binary_type, |
ee4e9625 | 271 | root_dir, name, PATH_MAX)) { |
cdd059d7 JO |
272 | free(name); |
273 | return -EINVAL; | |
274 | } | |
275 | ||
a08cae03 | 276 | fd = do_open(name); |
cdd059d7 JO |
277 | free(name); |
278 | return fd; | |
279 | } | |
280 | ||
c6580451 JO |
281 | static void check_data_close(void); |
282 | ||
c1f9aa0a JO |
283 | /** |
284 | * dso_close - Open DSO data file | |
285 | * @dso: dso object | |
286 | * | |
287 | * Open @dso's data file descriptor and updates | |
288 | * list/count of open DSO objects. | |
289 | */ | |
eba5102d JO |
290 | static int open_dso(struct dso *dso, struct machine *machine) |
291 | { | |
292 | int fd = __open_dso(dso, machine); | |
293 | ||
a6f6ae99 | 294 | if (fd >= 0) { |
eba5102d | 295 | dso__list_add(dso); |
c6580451 JO |
296 | /* |
297 | * Check if we crossed the allowed number | |
298 | * of opened DSOs and close one if needed. | |
299 | */ | |
300 | check_data_close(); | |
301 | } | |
eba5102d JO |
302 | |
303 | return fd; | |
304 | } | |
305 | ||
306 | static void close_data_fd(struct dso *dso) | |
53fa8eaa JO |
307 | { |
308 | if (dso->data.fd >= 0) { | |
309 | close(dso->data.fd); | |
310 | dso->data.fd = -1; | |
c3fbd2a6 | 311 | dso->data.file_size = 0; |
eba5102d | 312 | dso__list_del(dso); |
53fa8eaa JO |
313 | } |
314 | } | |
315 | ||
c1f9aa0a JO |
316 | /** |
317 | * dso_close - Close DSO data file | |
318 | * @dso: dso object | |
319 | * | |
320 | * Close @dso's data file descriptor and updates | |
321 | * list/count of open DSO objects. | |
322 | */ | |
eba5102d JO |
323 | static void close_dso(struct dso *dso) |
324 | { | |
325 | close_data_fd(dso); | |
326 | } | |
327 | ||
c6580451 JO |
328 | static void close_first_dso(void) |
329 | { | |
330 | struct dso *dso; | |
331 | ||
332 | dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); | |
333 | close_dso(dso); | |
334 | } | |
335 | ||
336 | static rlim_t get_fd_limit(void) | |
337 | { | |
338 | struct rlimit l; | |
339 | rlim_t limit = 0; | |
340 | ||
341 | /* Allow half of the current open fd limit. */ | |
342 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
343 | if (l.rlim_cur == RLIM_INFINITY) | |
344 | limit = l.rlim_cur; | |
345 | else | |
346 | limit = l.rlim_cur / 2; | |
347 | } else { | |
348 | pr_err("failed to get fd limit\n"); | |
349 | limit = 1; | |
350 | } | |
351 | ||
352 | return limit; | |
353 | } | |
354 | ||
355 | static bool may_cache_fd(void) | |
356 | { | |
357 | static rlim_t limit; | |
358 | ||
359 | if (!limit) | |
360 | limit = get_fd_limit(); | |
361 | ||
362 | if (limit == RLIM_INFINITY) | |
363 | return true; | |
364 | ||
365 | return limit > (rlim_t) dso__data_open_cnt; | |
366 | } | |
367 | ||
c1f9aa0a JO |
368 | /* |
369 | * Check and close LRU dso if we crossed allowed limit | |
370 | * for opened dso file descriptors. The limit is half | |
371 | * of the RLIMIT_NOFILE files opened. | |
372 | */ | |
c6580451 JO |
373 | static void check_data_close(void) |
374 | { | |
375 | bool cache_fd = may_cache_fd(); | |
376 | ||
377 | if (!cache_fd) | |
378 | close_first_dso(); | |
379 | } | |
380 | ||
c1f9aa0a JO |
381 | /** |
382 | * dso__data_close - Close DSO data file | |
383 | * @dso: dso object | |
384 | * | |
385 | * External interface to close @dso's data file descriptor. | |
386 | */ | |
eba5102d JO |
387 | void dso__data_close(struct dso *dso) |
388 | { | |
389 | close_dso(dso); | |
390 | } | |
391 | ||
c1f9aa0a JO |
392 | /** |
393 | * dso__data_fd - Get dso's data file descriptor | |
394 | * @dso: dso object | |
395 | * @machine: machine object | |
396 | * | |
397 | * External interface to find dso's file, open it and | |
398 | * returns file descriptor. | |
399 | */ | |
cdd059d7 JO |
400 | int dso__data_fd(struct dso *dso, struct machine *machine) |
401 | { | |
631d34b5 | 402 | enum dso_binary_type binary_type_data[] = { |
cdd059d7 JO |
403 | DSO_BINARY_TYPE__BUILD_ID_CACHE, |
404 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
405 | DSO_BINARY_TYPE__NOT_FOUND, | |
406 | }; | |
407 | int i = 0; | |
408 | ||
c27697d6 AH |
409 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
410 | return -1; | |
411 | ||
53fa8eaa | 412 | if (dso->data.fd >= 0) |
c27697d6 | 413 | goto out; |
53fa8eaa JO |
414 | |
415 | if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { | |
416 | dso->data.fd = open_dso(dso, machine); | |
c27697d6 | 417 | goto out; |
53fa8eaa | 418 | } |
cdd059d7 JO |
419 | |
420 | do { | |
5f70619d | 421 | dso->binary_type = binary_type_data[i++]; |
cdd059d7 | 422 | |
c27697d6 AH |
423 | dso->data.fd = open_dso(dso, machine); |
424 | if (dso->data.fd >= 0) | |
425 | goto out; | |
cdd059d7 | 426 | |
5f70619d | 427 | } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); |
c27697d6 AH |
428 | out: |
429 | if (dso->data.fd >= 0) | |
430 | dso->data.status = DSO_DATA_STATUS_OK; | |
431 | else | |
432 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
cdd059d7 | 433 | |
c27697d6 | 434 | return dso->data.fd; |
cdd059d7 JO |
435 | } |
436 | ||
288be943 AH |
437 | bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) |
438 | { | |
439 | u32 flag = 1 << by; | |
440 | ||
441 | if (dso->data.status_seen & flag) | |
442 | return true; | |
443 | ||
444 | dso->data.status_seen |= flag; | |
445 | ||
446 | return false; | |
447 | } | |
448 | ||
cdd059d7 JO |
449 | static void |
450 | dso_cache__free(struct rb_root *root) | |
451 | { | |
452 | struct rb_node *next = rb_first(root); | |
453 | ||
454 | while (next) { | |
455 | struct dso_cache *cache; | |
456 | ||
457 | cache = rb_entry(next, struct dso_cache, rb_node); | |
458 | next = rb_next(&cache->rb_node); | |
459 | rb_erase(&cache->rb_node, root); | |
460 | free(cache); | |
461 | } | |
462 | } | |
463 | ||
3344996e | 464 | static struct dso_cache *dso_cache__find(const struct rb_root *root, u64 offset) |
cdd059d7 | 465 | { |
3344996e ACM |
466 | struct rb_node * const *p = &root->rb_node; |
467 | const struct rb_node *parent = NULL; | |
cdd059d7 JO |
468 | struct dso_cache *cache; |
469 | ||
470 | while (*p != NULL) { | |
471 | u64 end; | |
472 | ||
473 | parent = *p; | |
474 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
475 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
476 | ||
477 | if (offset < cache->offset) | |
478 | p = &(*p)->rb_left; | |
479 | else if (offset >= end) | |
480 | p = &(*p)->rb_right; | |
481 | else | |
482 | return cache; | |
483 | } | |
484 | return NULL; | |
485 | } | |
486 | ||
487 | static void | |
488 | dso_cache__insert(struct rb_root *root, struct dso_cache *new) | |
489 | { | |
490 | struct rb_node **p = &root->rb_node; | |
491 | struct rb_node *parent = NULL; | |
492 | struct dso_cache *cache; | |
493 | u64 offset = new->offset; | |
494 | ||
495 | while (*p != NULL) { | |
496 | u64 end; | |
497 | ||
498 | parent = *p; | |
499 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
500 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
501 | ||
502 | if (offset < cache->offset) | |
503 | p = &(*p)->rb_left; | |
504 | else if (offset >= end) | |
505 | p = &(*p)->rb_right; | |
506 | } | |
507 | ||
508 | rb_link_node(&new->rb_node, parent, p); | |
509 | rb_insert_color(&new->rb_node, root); | |
510 | } | |
511 | ||
512 | static ssize_t | |
513 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
514 | u8 *data, u64 size) | |
515 | { | |
516 | u64 cache_offset = offset - cache->offset; | |
517 | u64 cache_size = min(cache->size - cache_offset, size); | |
518 | ||
519 | memcpy(data, cache->data + cache_offset, cache_size); | |
520 | return cache_size; | |
521 | } | |
522 | ||
523 | static ssize_t | |
c3fbd2a6 | 524 | dso_cache__read(struct dso *dso, u64 offset, u8 *data, ssize_t size) |
cdd059d7 JO |
525 | { |
526 | struct dso_cache *cache; | |
527 | ssize_t ret; | |
cdd059d7 JO |
528 | |
529 | do { | |
530 | u64 cache_offset; | |
531 | ||
532 | ret = -ENOMEM; | |
533 | ||
534 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); | |
535 | if (!cache) | |
536 | break; | |
537 | ||
538 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
539 | ret = -EINVAL; | |
540 | ||
c3fbd2a6 | 541 | if (-1 == lseek(dso->data.fd, cache_offset, SEEK_SET)) |
cdd059d7 JO |
542 | break; |
543 | ||
c3fbd2a6 | 544 | ret = read(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE); |
cdd059d7 JO |
545 | if (ret <= 0) |
546 | break; | |
547 | ||
548 | cache->offset = cache_offset; | |
549 | cache->size = ret; | |
ca40e2af | 550 | dso_cache__insert(&dso->data.cache, cache); |
cdd059d7 JO |
551 | |
552 | ret = dso_cache__memcpy(cache, offset, data, size); | |
553 | ||
554 | } while (0); | |
555 | ||
556 | if (ret <= 0) | |
557 | free(cache); | |
558 | ||
cdd059d7 JO |
559 | return ret; |
560 | } | |
561 | ||
c3fbd2a6 JO |
562 | static ssize_t dso_cache_read(struct dso *dso, u64 offset, |
563 | u8 *data, ssize_t size) | |
cdd059d7 JO |
564 | { |
565 | struct dso_cache *cache; | |
566 | ||
ca40e2af | 567 | cache = dso_cache__find(&dso->data.cache, offset); |
cdd059d7 JO |
568 | if (cache) |
569 | return dso_cache__memcpy(cache, offset, data, size); | |
570 | else | |
c3fbd2a6 | 571 | return dso_cache__read(dso, offset, data, size); |
cdd059d7 JO |
572 | } |
573 | ||
c1f9aa0a JO |
574 | /* |
575 | * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks | |
576 | * in the rb_tree. Any read to already cached data is served | |
577 | * by cached data. | |
578 | */ | |
c3fbd2a6 | 579 | static ssize_t cached_read(struct dso *dso, u64 offset, u8 *data, ssize_t size) |
cdd059d7 JO |
580 | { |
581 | ssize_t r = 0; | |
582 | u8 *p = data; | |
583 | ||
584 | do { | |
585 | ssize_t ret; | |
586 | ||
c3fbd2a6 | 587 | ret = dso_cache_read(dso, offset, p, size); |
cdd059d7 JO |
588 | if (ret < 0) |
589 | return ret; | |
590 | ||
591 | /* Reached EOF, return what we have. */ | |
592 | if (!ret) | |
593 | break; | |
594 | ||
595 | BUG_ON(ret > size); | |
596 | ||
597 | r += ret; | |
598 | p += ret; | |
599 | offset += ret; | |
600 | size -= ret; | |
601 | ||
602 | } while (size); | |
603 | ||
604 | return r; | |
605 | } | |
606 | ||
c3fbd2a6 JO |
607 | static int data_file_size(struct dso *dso) |
608 | { | |
609 | struct stat st; | |
6e81c74c | 610 | char sbuf[STRERR_BUFSIZE]; |
c3fbd2a6 JO |
611 | |
612 | if (!dso->data.file_size) { | |
613 | if (fstat(dso->data.fd, &st)) { | |
6e81c74c MH |
614 | pr_err("dso mmap failed, fstat: %s\n", |
615 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
c3fbd2a6 JO |
616 | return -1; |
617 | } | |
618 | dso->data.file_size = st.st_size; | |
619 | } | |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
6d363459 AH |
624 | /** |
625 | * dso__data_size - Return dso data size | |
626 | * @dso: dso object | |
627 | * @machine: machine object | |
628 | * | |
629 | * Return: dso data size | |
630 | */ | |
631 | off_t dso__data_size(struct dso *dso, struct machine *machine) | |
632 | { | |
633 | int fd; | |
634 | ||
635 | fd = dso__data_fd(dso, machine); | |
636 | if (fd < 0) | |
637 | return fd; | |
638 | ||
639 | if (data_file_size(dso)) | |
640 | return -1; | |
641 | ||
642 | /* For now just estimate dso data size is close to file size */ | |
643 | return dso->data.file_size; | |
644 | } | |
645 | ||
c3fbd2a6 JO |
646 | static ssize_t data_read_offset(struct dso *dso, u64 offset, |
647 | u8 *data, ssize_t size) | |
648 | { | |
649 | if (data_file_size(dso)) | |
650 | return -1; | |
651 | ||
652 | /* Check the offset sanity. */ | |
653 | if (offset > dso->data.file_size) | |
654 | return -1; | |
655 | ||
656 | if (offset + size < offset) | |
657 | return -1; | |
658 | ||
659 | return cached_read(dso, offset, data, size); | |
660 | } | |
661 | ||
c1f9aa0a JO |
662 | /** |
663 | * dso__data_read_offset - Read data from dso file offset | |
664 | * @dso: dso object | |
665 | * @machine: machine object | |
666 | * @offset: file offset | |
667 | * @data: buffer to store data | |
668 | * @size: size of the @data buffer | |
669 | * | |
670 | * External interface to read data from dso file offset. Open | |
671 | * dso data file and use cached_read to get the data. | |
672 | */ | |
c3fbd2a6 JO |
673 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, |
674 | u64 offset, u8 *data, ssize_t size) | |
675 | { | |
676 | if (dso__data_fd(dso, machine) < 0) | |
677 | return -1; | |
678 | ||
679 | return data_read_offset(dso, offset, data, size); | |
680 | } | |
681 | ||
c1f9aa0a JO |
682 | /** |
683 | * dso__data_read_addr - Read data from dso address | |
684 | * @dso: dso object | |
685 | * @machine: machine object | |
686 | * @add: virtual memory address | |
687 | * @data: buffer to store data | |
688 | * @size: size of the @data buffer | |
689 | * | |
690 | * External interface to read data from dso address. | |
691 | */ | |
cdd059d7 JO |
692 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, |
693 | struct machine *machine, u64 addr, | |
694 | u8 *data, ssize_t size) | |
695 | { | |
696 | u64 offset = map->map_ip(map, addr); | |
697 | return dso__data_read_offset(dso, machine, offset, data, size); | |
698 | } | |
699 | ||
700 | struct map *dso__new_map(const char *name) | |
701 | { | |
702 | struct map *map = NULL; | |
703 | struct dso *dso = dso__new(name); | |
704 | ||
705 | if (dso) | |
706 | map = map__new2(0, dso, MAP__FUNCTION); | |
707 | ||
708 | return map; | |
709 | } | |
710 | ||
711 | struct dso *dso__kernel_findnew(struct machine *machine, const char *name, | |
712 | const char *short_name, int dso_type) | |
713 | { | |
714 | /* | |
715 | * The kernel dso could be created by build_id processing. | |
716 | */ | |
717 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, name); | |
718 | ||
719 | /* | |
720 | * We need to run this in all cases, since during the build_id | |
721 | * processing we had no idea this was the kernel dso. | |
722 | */ | |
723 | if (dso != NULL) { | |
58a98c9c | 724 | dso__set_short_name(dso, short_name, false); |
cdd059d7 JO |
725 | dso->kernel = dso_type; |
726 | } | |
727 | ||
728 | return dso; | |
729 | } | |
730 | ||
4598a0a6 WL |
731 | /* |
732 | * Find a matching entry and/or link current entry to RB tree. | |
733 | * Either one of the dso or name parameter must be non-NULL or the | |
734 | * function will not work. | |
735 | */ | |
736 | static struct dso *dso__findlink_by_longname(struct rb_root *root, | |
737 | struct dso *dso, const char *name) | |
738 | { | |
739 | struct rb_node **p = &root->rb_node; | |
740 | struct rb_node *parent = NULL; | |
741 | ||
742 | if (!name) | |
743 | name = dso->long_name; | |
744 | /* | |
745 | * Find node with the matching name | |
746 | */ | |
747 | while (*p) { | |
748 | struct dso *this = rb_entry(*p, struct dso, rb_node); | |
749 | int rc = strcmp(name, this->long_name); | |
750 | ||
751 | parent = *p; | |
752 | if (rc == 0) { | |
753 | /* | |
754 | * In case the new DSO is a duplicate of an existing | |
755 | * one, print an one-time warning & put the new entry | |
756 | * at the end of the list of duplicates. | |
757 | */ | |
758 | if (!dso || (dso == this)) | |
759 | return this; /* Find matching dso */ | |
760 | /* | |
761 | * The core kernel DSOs may have duplicated long name. | |
762 | * In this case, the short name should be different. | |
763 | * Comparing the short names to differentiate the DSOs. | |
764 | */ | |
765 | rc = strcmp(dso->short_name, this->short_name); | |
766 | if (rc == 0) { | |
767 | pr_err("Duplicated dso name: %s\n", name); | |
768 | return NULL; | |
769 | } | |
770 | } | |
771 | if (rc < 0) | |
772 | p = &parent->rb_left; | |
773 | else | |
774 | p = &parent->rb_right; | |
775 | } | |
776 | if (dso) { | |
777 | /* Add new node and rebalance tree */ | |
778 | rb_link_node(&dso->rb_node, parent, p); | |
779 | rb_insert_color(&dso->rb_node, root); | |
780 | } | |
781 | return NULL; | |
782 | } | |
783 | ||
784 | static inline struct dso * | |
785 | dso__find_by_longname(const struct rb_root *root, const char *name) | |
786 | { | |
787 | return dso__findlink_by_longname((struct rb_root *)root, NULL, name); | |
788 | } | |
789 | ||
bf4414ae | 790 | void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
791 | { |
792 | if (name == NULL) | |
793 | return; | |
7e155d4d ACM |
794 | |
795 | if (dso->long_name_allocated) | |
bf4414ae | 796 | free((char *)dso->long_name); |
7e155d4d ACM |
797 | |
798 | dso->long_name = name; | |
799 | dso->long_name_len = strlen(name); | |
800 | dso->long_name_allocated = name_allocated; | |
cdd059d7 JO |
801 | } |
802 | ||
58a98c9c | 803 | void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
804 | { |
805 | if (name == NULL) | |
806 | return; | |
58a98c9c AH |
807 | |
808 | if (dso->short_name_allocated) | |
809 | free((char *)dso->short_name); | |
810 | ||
811 | dso->short_name = name; | |
812 | dso->short_name_len = strlen(name); | |
813 | dso->short_name_allocated = name_allocated; | |
cdd059d7 JO |
814 | } |
815 | ||
816 | static void dso__set_basename(struct dso *dso) | |
817 | { | |
ac5e7f84 SE |
818 | /* |
819 | * basename() may modify path buffer, so we must pass | |
820 | * a copy. | |
821 | */ | |
822 | char *base, *lname = strdup(dso->long_name); | |
823 | ||
824 | if (!lname) | |
825 | return; | |
826 | ||
827 | /* | |
828 | * basename() may return a pointer to internal | |
829 | * storage which is reused in subsequent calls | |
830 | * so copy the result. | |
831 | */ | |
832 | base = strdup(basename(lname)); | |
833 | ||
834 | free(lname); | |
835 | ||
836 | if (!base) | |
837 | return; | |
838 | ||
839 | dso__set_short_name(dso, base, true); | |
cdd059d7 JO |
840 | } |
841 | ||
842 | int dso__name_len(const struct dso *dso) | |
843 | { | |
844 | if (!dso) | |
845 | return strlen("[unknown]"); | |
846 | if (verbose) | |
847 | return dso->long_name_len; | |
848 | ||
849 | return dso->short_name_len; | |
850 | } | |
851 | ||
852 | bool dso__loaded(const struct dso *dso, enum map_type type) | |
853 | { | |
854 | return dso->loaded & (1 << type); | |
855 | } | |
856 | ||
857 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) | |
858 | { | |
859 | return dso->sorted_by_name & (1 << type); | |
860 | } | |
861 | ||
862 | void dso__set_sorted_by_name(struct dso *dso, enum map_type type) | |
863 | { | |
864 | dso->sorted_by_name |= (1 << type); | |
865 | } | |
866 | ||
867 | struct dso *dso__new(const char *name) | |
868 | { | |
869 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
870 | ||
871 | if (dso != NULL) { | |
872 | int i; | |
873 | strcpy(dso->name, name); | |
7e155d4d | 874 | dso__set_long_name(dso, dso->name, false); |
58a98c9c | 875 | dso__set_short_name(dso, dso->name, false); |
cdd059d7 JO |
876 | for (i = 0; i < MAP__NR_TYPES; ++i) |
877 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; | |
ca40e2af | 878 | dso->data.cache = RB_ROOT; |
53fa8eaa | 879 | dso->data.fd = -1; |
c27697d6 | 880 | dso->data.status = DSO_DATA_STATUS_UNKNOWN; |
cdd059d7 | 881 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
5f70619d | 882 | dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; |
c6d8f2a4 | 883 | dso->is_64_bit = (sizeof(void *) == 8); |
cdd059d7 | 884 | dso->loaded = 0; |
0131c4ec | 885 | dso->rel = 0; |
cdd059d7 JO |
886 | dso->sorted_by_name = 0; |
887 | dso->has_build_id = 0; | |
2cc9d0ef | 888 | dso->has_srcline = 1; |
906049c8 | 889 | dso->a2l_fails = 1; |
cdd059d7 JO |
890 | dso->kernel = DSO_TYPE_USER; |
891 | dso->needs_swap = DSO_SWAP__UNSET; | |
4598a0a6 | 892 | RB_CLEAR_NODE(&dso->rb_node); |
cdd059d7 | 893 | INIT_LIST_HEAD(&dso->node); |
eba5102d | 894 | INIT_LIST_HEAD(&dso->data.open_entry); |
cdd059d7 JO |
895 | } |
896 | ||
897 | return dso; | |
898 | } | |
899 | ||
900 | void dso__delete(struct dso *dso) | |
901 | { | |
902 | int i; | |
4598a0a6 WL |
903 | |
904 | if (!RB_EMPTY_NODE(&dso->rb_node)) | |
905 | pr_err("DSO %s is still in rbtree when being deleted!\n", | |
906 | dso->long_name); | |
cdd059d7 JO |
907 | for (i = 0; i < MAP__NR_TYPES; ++i) |
908 | symbols__delete(&dso->symbols[i]); | |
ee021d42 ACM |
909 | |
910 | if (dso->short_name_allocated) { | |
04662523 | 911 | zfree((char **)&dso->short_name); |
ee021d42 ACM |
912 | dso->short_name_allocated = false; |
913 | } | |
914 | ||
915 | if (dso->long_name_allocated) { | |
04662523 | 916 | zfree((char **)&dso->long_name); |
ee021d42 ACM |
917 | dso->long_name_allocated = false; |
918 | } | |
919 | ||
53fa8eaa | 920 | dso__data_close(dso); |
ca40e2af | 921 | dso_cache__free(&dso->data.cache); |
454ff00f | 922 | dso__free_a2l(dso); |
04662523 | 923 | zfree(&dso->symsrc_filename); |
cdd059d7 JO |
924 | free(dso); |
925 | } | |
926 | ||
927 | void dso__set_build_id(struct dso *dso, void *build_id) | |
928 | { | |
929 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
930 | dso->has_build_id = 1; | |
931 | } | |
932 | ||
933 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
934 | { | |
935 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
936 | } | |
937 | ||
938 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
939 | { | |
940 | char path[PATH_MAX]; | |
941 | ||
942 | if (machine__is_default_guest(machine)) | |
943 | return; | |
944 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
945 | if (sysfs__read_build_id(path, dso->build_id, | |
946 | sizeof(dso->build_id)) == 0) | |
947 | dso->has_build_id = true; | |
948 | } | |
949 | ||
950 | int dso__kernel_module_get_build_id(struct dso *dso, | |
951 | const char *root_dir) | |
952 | { | |
953 | char filename[PATH_MAX]; | |
954 | /* | |
955 | * kernel module short names are of the form "[module]" and | |
956 | * we need just "module" here. | |
957 | */ | |
958 | const char *name = dso->short_name + 1; | |
959 | ||
960 | snprintf(filename, sizeof(filename), | |
961 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
962 | root_dir, (int)strlen(name) - 1, name); | |
963 | ||
964 | if (sysfs__read_build_id(filename, dso->build_id, | |
965 | sizeof(dso->build_id)) == 0) | |
966 | dso->has_build_id = true; | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
972 | { | |
973 | bool have_build_id = false; | |
974 | struct dso *pos; | |
975 | ||
976 | list_for_each_entry(pos, head, node) { | |
977 | if (with_hits && !pos->hit) | |
978 | continue; | |
979 | if (pos->has_build_id) { | |
980 | have_build_id = true; | |
981 | continue; | |
982 | } | |
983 | if (filename__read_build_id(pos->long_name, pos->build_id, | |
984 | sizeof(pos->build_id)) > 0) { | |
985 | have_build_id = true; | |
986 | pos->has_build_id = true; | |
987 | } | |
988 | } | |
989 | ||
990 | return have_build_id; | |
991 | } | |
992 | ||
8fa7d87f | 993 | void dsos__add(struct dsos *dsos, struct dso *dso) |
cdd059d7 | 994 | { |
8fa7d87f | 995 | list_add_tail(&dso->node, &dsos->head); |
4598a0a6 | 996 | dso__findlink_by_longname(&dsos->root, dso, NULL); |
cdd059d7 JO |
997 | } |
998 | ||
8fa7d87f WL |
999 | struct dso *dsos__find(const struct dsos *dsos, const char *name, |
1000 | bool cmp_short) | |
cdd059d7 JO |
1001 | { |
1002 | struct dso *pos; | |
1003 | ||
f9ceffb6 | 1004 | if (cmp_short) { |
8fa7d87f | 1005 | list_for_each_entry(pos, &dsos->head, node) |
f9ceffb6 WL |
1006 | if (strcmp(pos->short_name, name) == 0) |
1007 | return pos; | |
1008 | return NULL; | |
1009 | } | |
4598a0a6 | 1010 | return dso__find_by_longname(&dsos->root, name); |
cdd059d7 JO |
1011 | } |
1012 | ||
8fa7d87f | 1013 | struct dso *__dsos__findnew(struct dsos *dsos, const char *name) |
cdd059d7 | 1014 | { |
8fa7d87f | 1015 | struct dso *dso = dsos__find(dsos, name, false); |
cdd059d7 JO |
1016 | |
1017 | if (!dso) { | |
1018 | dso = dso__new(name); | |
1019 | if (dso != NULL) { | |
8fa7d87f | 1020 | dsos__add(dsos, dso); |
cdd059d7 JO |
1021 | dso__set_basename(dso); |
1022 | } | |
1023 | } | |
1024 | ||
1025 | return dso; | |
1026 | } | |
1027 | ||
1028 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, | |
417c2ff6 | 1029 | bool (skip)(struct dso *dso, int parm), int parm) |
cdd059d7 JO |
1030 | { |
1031 | struct dso *pos; | |
1032 | size_t ret = 0; | |
1033 | ||
1034 | list_for_each_entry(pos, head, node) { | |
417c2ff6 | 1035 | if (skip && skip(pos, parm)) |
cdd059d7 JO |
1036 | continue; |
1037 | ret += dso__fprintf_buildid(pos, fp); | |
1038 | ret += fprintf(fp, " %s\n", pos->long_name); | |
1039 | } | |
1040 | return ret; | |
1041 | } | |
1042 | ||
1043 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
1044 | { | |
1045 | struct dso *pos; | |
1046 | size_t ret = 0; | |
1047 | ||
1048 | list_for_each_entry(pos, head, node) { | |
1049 | int i; | |
1050 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
1051 | ret += dso__fprintf(pos, i, fp); | |
1052 | } | |
1053 | ||
1054 | return ret; | |
1055 | } | |
1056 | ||
1057 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
1058 | { | |
1059 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1060 | ||
1061 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1062 | return fprintf(fp, "%s", sbuild_id); | |
1063 | } | |
1064 | ||
1065 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) | |
1066 | { | |
1067 | struct rb_node *nd; | |
1068 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
1069 | ||
1070 | if (dso->short_name != dso->long_name) | |
1071 | ret += fprintf(fp, "%s, ", dso->long_name); | |
1072 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
919d590f | 1073 | dso__loaded(dso, type) ? "" : "NOT "); |
cdd059d7 JO |
1074 | ret += dso__fprintf_buildid(dso, fp); |
1075 | ret += fprintf(fp, ")\n"); | |
1076 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { | |
1077 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
1078 | ret += symbol__fprintf(pos, fp); | |
1079 | } | |
1080 | ||
1081 | return ret; | |
1082 | } | |
2b5b8bb2 AH |
1083 | |
1084 | enum dso_type dso__type(struct dso *dso, struct machine *machine) | |
1085 | { | |
1086 | int fd; | |
1087 | ||
1088 | fd = dso__data_fd(dso, machine); | |
1089 | if (fd < 0) | |
1090 | return DSO__TYPE_UNKNOWN; | |
1091 | ||
1092 | return dso__type_fd(fd); | |
1093 | } |