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Commit | Line | Data |
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bda6ee4a | 1 | #include <asm/bug.h> |
877a7a11 | 2 | #include <linux/kernel.h> |
c6580451 JO |
3 | #include <sys/time.h> |
4 | #include <sys/resource.h> | |
cdd059d7 JO |
5 | #include "symbol.h" |
6 | #include "dso.h" | |
69d2591a | 7 | #include "machine.h" |
cfe9174f | 8 | #include "auxtrace.h" |
cdd059d7 JO |
9 | #include "util.h" |
10 | #include "debug.h" | |
a067558e | 11 | #include "string2.h" |
6ae98ba6 | 12 | #include "vdso.h" |
cdd059d7 | 13 | |
9343e45b MGP |
14 | static const char * const debuglink_paths[] = { |
15 | "%.0s%s", | |
16 | "%s/%s", | |
17 | "%s/.debug/%s", | |
18 | "/usr/lib/debug%s/%s" | |
19 | }; | |
20 | ||
cdd059d7 JO |
21 | char dso__symtab_origin(const struct dso *dso) |
22 | { | |
23 | static const char origin[] = { | |
9cd00941 RRD |
24 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
25 | [DSO_BINARY_TYPE__VMLINUX] = 'v', | |
26 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
27 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
28 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
29 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', | |
30 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
31 | [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', | |
32 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
33 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
34 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
c00c48fc | 35 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm', |
9cd00941 RRD |
36 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', |
37 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
c00c48fc | 38 | [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', |
9cd00941 | 39 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', |
cdd059d7 JO |
40 | }; |
41 | ||
42 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
43 | return '!'; | |
44 | return origin[dso->symtab_type]; | |
45 | } | |
46 | ||
ee4e9625 ACM |
47 | int dso__read_binary_type_filename(const struct dso *dso, |
48 | enum dso_binary_type type, | |
49 | char *root_dir, char *filename, size_t size) | |
cdd059d7 | 50 | { |
b5d8bbe8 | 51 | char build_id_hex[SBUILD_ID_SIZE]; |
cdd059d7 | 52 | int ret = 0; |
972f393b | 53 | size_t len; |
cdd059d7 JO |
54 | |
55 | switch (type) { | |
9343e45b MGP |
56 | case DSO_BINARY_TYPE__DEBUGLINK: |
57 | { | |
58 | const char *last_slash; | |
59 | char dso_dir[PATH_MAX]; | |
60 | char symfile[PATH_MAX]; | |
61 | unsigned int i; | |
cdd059d7 | 62 | |
dc6254cf | 63 | len = __symbol__join_symfs(filename, size, dso->long_name); |
9343e45b MGP |
64 | last_slash = filename + len; |
65 | while (last_slash != filename && *last_slash != '/') | |
66 | last_slash--; | |
40356721 | 67 | |
9343e45b MGP |
68 | strncpy(dso_dir, filename, last_slash - filename); |
69 | dso_dir[last_slash-filename] = '\0'; | |
70 | ||
71 | if (!is_regular_file(filename)) { | |
72 | ret = -1; | |
40356721 | 73 | break; |
9343e45b | 74 | } |
40356721 | 75 | |
9343e45b MGP |
76 | ret = filename__read_debuglink(filename, symfile, PATH_MAX); |
77 | if (ret) | |
78 | break; | |
79 | ||
80 | /* Check predefined locations where debug file might reside */ | |
81 | ret = -1; | |
82 | for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) { | |
83 | snprintf(filename, size, | |
84 | debuglink_paths[i], dso_dir, symfile); | |
85 | if (is_regular_file(filename)) { | |
86 | ret = 0; | |
87 | break; | |
88 | } | |
cdd059d7 | 89 | } |
9343e45b | 90 | |
cdd059d7 | 91 | break; |
9343e45b | 92 | } |
cdd059d7 | 93 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: |
a7066709 | 94 | if (dso__build_id_filename(dso, filename, size) == NULL) |
cdd059d7 JO |
95 | ret = -1; |
96 | break; | |
97 | ||
98 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
972f393b ACM |
99 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
100 | snprintf(filename + len, size - len, "%s.debug", dso->long_name); | |
cdd059d7 JO |
101 | break; |
102 | ||
103 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
972f393b ACM |
104 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
105 | snprintf(filename + len, size - len, "%s", dso->long_name); | |
cdd059d7 JO |
106 | break; |
107 | ||
9cd00941 RRD |
108 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
109 | { | |
bf4414ae | 110 | const char *last_slash; |
9cd00941 RRD |
111 | size_t dir_size; |
112 | ||
113 | last_slash = dso->long_name + dso->long_name_len; | |
114 | while (last_slash != dso->long_name && *last_slash != '/') | |
115 | last_slash--; | |
116 | ||
972f393b | 117 | len = __symbol__join_symfs(filename, size, ""); |
9cd00941 RRD |
118 | dir_size = last_slash - dso->long_name + 2; |
119 | if (dir_size > (size - len)) { | |
120 | ret = -1; | |
121 | break; | |
122 | } | |
7d2a5122 ACM |
123 | len += scnprintf(filename + len, dir_size, "%s", dso->long_name); |
124 | len += scnprintf(filename + len , size - len, ".debug%s", | |
9cd00941 RRD |
125 | last_slash); |
126 | break; | |
127 | } | |
128 | ||
cdd059d7 JO |
129 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
130 | if (!dso->has_build_id) { | |
131 | ret = -1; | |
132 | break; | |
133 | } | |
134 | ||
135 | build_id__sprintf(dso->build_id, | |
136 | sizeof(dso->build_id), | |
137 | build_id_hex); | |
972f393b ACM |
138 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); |
139 | snprintf(filename + len, size - len, "%.2s/%s.debug", | |
140 | build_id_hex, build_id_hex + 2); | |
cdd059d7 JO |
141 | break; |
142 | ||
39b12f78 AH |
143 | case DSO_BINARY_TYPE__VMLINUX: |
144 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
cdd059d7 | 145 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
972f393b | 146 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
147 | break; |
148 | ||
149 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 150 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
972f393b ACM |
151 | path__join3(filename, size, symbol_conf.symfs, |
152 | root_dir, dso->long_name); | |
cdd059d7 JO |
153 | break; |
154 | ||
155 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
c00c48fc | 156 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
972f393b | 157 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
158 | break; |
159 | ||
8e0cf965 AH |
160 | case DSO_BINARY_TYPE__KCORE: |
161 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
7d2a5122 | 162 | snprintf(filename, size, "%s", dso->long_name); |
8e0cf965 AH |
163 | break; |
164 | ||
cdd059d7 JO |
165 | default: |
166 | case DSO_BINARY_TYPE__KALLSYMS: | |
cdd059d7 | 167 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
cdd059d7 JO |
168 | case DSO_BINARY_TYPE__JAVA_JIT: |
169 | case DSO_BINARY_TYPE__NOT_FOUND: | |
170 | ret = -1; | |
171 | break; | |
172 | } | |
173 | ||
174 | return ret; | |
175 | } | |
176 | ||
c00c48fc NK |
177 | static const struct { |
178 | const char *fmt; | |
179 | int (*decompress)(const char *input, int output); | |
180 | } compressions[] = { | |
e92ce12e NK |
181 | #ifdef HAVE_ZLIB_SUPPORT |
182 | { "gz", gzip_decompress_to_file }, | |
80a32e5b JO |
183 | #endif |
184 | #ifdef HAVE_LZMA_SUPPORT | |
185 | { "xz", lzma_decompress_to_file }, | |
e92ce12e NK |
186 | #endif |
187 | { NULL, NULL }, | |
c00c48fc NK |
188 | }; |
189 | ||
190 | bool is_supported_compression(const char *ext) | |
191 | { | |
192 | unsigned i; | |
193 | ||
194 | for (i = 0; compressions[i].fmt; i++) { | |
195 | if (!strcmp(ext, compressions[i].fmt)) | |
196 | return true; | |
197 | } | |
198 | return false; | |
199 | } | |
200 | ||
1f121b03 | 201 | bool is_kernel_module(const char *pathname, int cpumode) |
c00c48fc | 202 | { |
8dee9ff1 | 203 | struct kmod_path m; |
1f121b03 WN |
204 | int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK; |
205 | ||
206 | WARN_ONCE(mode != cpumode, | |
207 | "Internal error: passing unmasked cpumode (%x) to is_kernel_module", | |
208 | cpumode); | |
209 | ||
210 | switch (mode) { | |
211 | case PERF_RECORD_MISC_USER: | |
212 | case PERF_RECORD_MISC_HYPERVISOR: | |
213 | case PERF_RECORD_MISC_GUEST_USER: | |
214 | return false; | |
215 | /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */ | |
216 | default: | |
217 | if (kmod_path__parse(&m, pathname)) { | |
218 | pr_err("Failed to check whether %s is a kernel module or not. Assume it is.", | |
219 | pathname); | |
220 | return true; | |
221 | } | |
222 | } | |
c00c48fc | 223 | |
8dee9ff1 | 224 | return m.kmod; |
c00c48fc NK |
225 | } |
226 | ||
227 | bool decompress_to_file(const char *ext, const char *filename, int output_fd) | |
228 | { | |
229 | unsigned i; | |
230 | ||
231 | for (i = 0; compressions[i].fmt; i++) { | |
232 | if (!strcmp(ext, compressions[i].fmt)) | |
233 | return !compressions[i].decompress(filename, | |
234 | output_fd); | |
235 | } | |
236 | return false; | |
237 | } | |
238 | ||
239 | bool dso__needs_decompress(struct dso *dso) | |
240 | { | |
241 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || | |
242 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
243 | } | |
244 | ||
3c8a67f5 JO |
245 | /* |
246 | * Parses kernel module specified in @path and updates | |
247 | * @m argument like: | |
248 | * | |
249 | * @comp - true if @path contains supported compression suffix, | |
250 | * false otherwise | |
251 | * @kmod - true if @path contains '.ko' suffix in right position, | |
252 | * false otherwise | |
253 | * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name | |
254 | * of the kernel module without suffixes, otherwise strudup-ed | |
255 | * base name of @path | |
256 | * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string | |
257 | * the compression suffix | |
258 | * | |
259 | * Returns 0 if there's no strdup error, -ENOMEM otherwise. | |
260 | */ | |
261 | int __kmod_path__parse(struct kmod_path *m, const char *path, | |
262 | bool alloc_name, bool alloc_ext) | |
263 | { | |
264 | const char *name = strrchr(path, '/'); | |
265 | const char *ext = strrchr(path, '.'); | |
1f121b03 | 266 | bool is_simple_name = false; |
3c8a67f5 JO |
267 | |
268 | memset(m, 0x0, sizeof(*m)); | |
269 | name = name ? name + 1 : path; | |
270 | ||
1f121b03 WN |
271 | /* |
272 | * '.' is also a valid character for module name. For example: | |
273 | * [aaa.bbb] is a valid module name. '[' should have higher | |
274 | * priority than '.ko' suffix. | |
275 | * | |
276 | * The kernel names are from machine__mmap_name. Such | |
277 | * name should belong to kernel itself, not kernel module. | |
278 | */ | |
279 | if (name[0] == '[') { | |
280 | is_simple_name = true; | |
281 | if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) || | |
282 | (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) || | |
283 | (strncmp(name, "[vdso]", 6) == 0) || | |
284 | (strncmp(name, "[vsyscall]", 10) == 0)) { | |
285 | m->kmod = false; | |
286 | ||
287 | } else | |
288 | m->kmod = true; | |
289 | } | |
290 | ||
3c8a67f5 | 291 | /* No extension, just return name. */ |
1f121b03 | 292 | if ((ext == NULL) || is_simple_name) { |
3c8a67f5 JO |
293 | if (alloc_name) { |
294 | m->name = strdup(name); | |
295 | return m->name ? 0 : -ENOMEM; | |
296 | } | |
297 | return 0; | |
298 | } | |
299 | ||
300 | if (is_supported_compression(ext + 1)) { | |
301 | m->comp = true; | |
302 | ext -= 3; | |
303 | } | |
304 | ||
305 | /* Check .ko extension only if there's enough name left. */ | |
306 | if (ext > name) | |
307 | m->kmod = !strncmp(ext, ".ko", 3); | |
308 | ||
309 | if (alloc_name) { | |
310 | if (m->kmod) { | |
311 | if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1) | |
312 | return -ENOMEM; | |
313 | } else { | |
314 | if (asprintf(&m->name, "%s", name) == -1) | |
315 | return -ENOMEM; | |
316 | } | |
317 | ||
318 | strxfrchar(m->name, '-', '_'); | |
319 | } | |
320 | ||
321 | if (alloc_ext && m->comp) { | |
322 | m->ext = strdup(ext + 4); | |
323 | if (!m->ext) { | |
324 | free((void *) m->name); | |
325 | return -ENOMEM; | |
326 | } | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
eba5102d | 332 | /* |
bda6ee4a | 333 | * Global list of open DSOs and the counter. |
eba5102d JO |
334 | */ |
335 | static LIST_HEAD(dso__data_open); | |
bda6ee4a | 336 | static long dso__data_open_cnt; |
33bdedce | 337 | static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER; |
eba5102d JO |
338 | |
339 | static void dso__list_add(struct dso *dso) | |
340 | { | |
341 | list_add_tail(&dso->data.open_entry, &dso__data_open); | |
bda6ee4a | 342 | dso__data_open_cnt++; |
eba5102d JO |
343 | } |
344 | ||
345 | static void dso__list_del(struct dso *dso) | |
346 | { | |
347 | list_del(&dso->data.open_entry); | |
bda6ee4a JO |
348 | WARN_ONCE(dso__data_open_cnt <= 0, |
349 | "DSO data fd counter out of bounds."); | |
350 | dso__data_open_cnt--; | |
eba5102d JO |
351 | } |
352 | ||
a08cae03 JO |
353 | static void close_first_dso(void); |
354 | ||
355 | static int do_open(char *name) | |
356 | { | |
357 | int fd; | |
6e81c74c | 358 | char sbuf[STRERR_BUFSIZE]; |
a08cae03 JO |
359 | |
360 | do { | |
361 | fd = open(name, O_RDONLY); | |
362 | if (fd >= 0) | |
363 | return fd; | |
364 | ||
a3c0cc2a | 365 | pr_debug("dso open failed: %s\n", |
c8b5f2c9 | 366 | str_error_r(errno, sbuf, sizeof(sbuf))); |
a08cae03 JO |
367 | if (!dso__data_open_cnt || errno != EMFILE) |
368 | break; | |
369 | ||
370 | close_first_dso(); | |
371 | } while (1); | |
372 | ||
373 | return -1; | |
374 | } | |
375 | ||
eba5102d | 376 | static int __open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 377 | { |
cdd059d7 | 378 | int fd; |
ee4e9625 ACM |
379 | char *root_dir = (char *)""; |
380 | char *name = malloc(PATH_MAX); | |
cdd059d7 | 381 | |
cdd059d7 JO |
382 | if (!name) |
383 | return -ENOMEM; | |
384 | ||
385 | if (machine) | |
386 | root_dir = machine->root_dir; | |
387 | ||
5f70619d | 388 | if (dso__read_binary_type_filename(dso, dso->binary_type, |
ee4e9625 | 389 | root_dir, name, PATH_MAX)) { |
cdd059d7 JO |
390 | free(name); |
391 | return -EINVAL; | |
392 | } | |
393 | ||
3c028a0c JO |
394 | if (!is_regular_file(name)) |
395 | return -EINVAL; | |
396 | ||
a08cae03 | 397 | fd = do_open(name); |
cdd059d7 JO |
398 | free(name); |
399 | return fd; | |
400 | } | |
401 | ||
c6580451 JO |
402 | static void check_data_close(void); |
403 | ||
c1f9aa0a JO |
404 | /** |
405 | * dso_close - Open DSO data file | |
406 | * @dso: dso object | |
407 | * | |
408 | * Open @dso's data file descriptor and updates | |
409 | * list/count of open DSO objects. | |
410 | */ | |
eba5102d JO |
411 | static int open_dso(struct dso *dso, struct machine *machine) |
412 | { | |
413 | int fd = __open_dso(dso, machine); | |
414 | ||
a6f6ae99 | 415 | if (fd >= 0) { |
eba5102d | 416 | dso__list_add(dso); |
c6580451 JO |
417 | /* |
418 | * Check if we crossed the allowed number | |
419 | * of opened DSOs and close one if needed. | |
420 | */ | |
421 | check_data_close(); | |
422 | } | |
eba5102d JO |
423 | |
424 | return fd; | |
425 | } | |
426 | ||
427 | static void close_data_fd(struct dso *dso) | |
53fa8eaa JO |
428 | { |
429 | if (dso->data.fd >= 0) { | |
430 | close(dso->data.fd); | |
431 | dso->data.fd = -1; | |
c3fbd2a6 | 432 | dso->data.file_size = 0; |
eba5102d | 433 | dso__list_del(dso); |
53fa8eaa JO |
434 | } |
435 | } | |
436 | ||
c1f9aa0a JO |
437 | /** |
438 | * dso_close - Close DSO data file | |
439 | * @dso: dso object | |
440 | * | |
441 | * Close @dso's data file descriptor and updates | |
442 | * list/count of open DSO objects. | |
443 | */ | |
eba5102d JO |
444 | static void close_dso(struct dso *dso) |
445 | { | |
446 | close_data_fd(dso); | |
447 | } | |
448 | ||
c6580451 JO |
449 | static void close_first_dso(void) |
450 | { | |
451 | struct dso *dso; | |
452 | ||
453 | dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); | |
454 | close_dso(dso); | |
455 | } | |
456 | ||
457 | static rlim_t get_fd_limit(void) | |
458 | { | |
459 | struct rlimit l; | |
460 | rlim_t limit = 0; | |
461 | ||
462 | /* Allow half of the current open fd limit. */ | |
463 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
464 | if (l.rlim_cur == RLIM_INFINITY) | |
465 | limit = l.rlim_cur; | |
466 | else | |
467 | limit = l.rlim_cur / 2; | |
468 | } else { | |
469 | pr_err("failed to get fd limit\n"); | |
470 | limit = 1; | |
471 | } | |
472 | ||
473 | return limit; | |
474 | } | |
475 | ||
f3069249 JO |
476 | static rlim_t fd_limit; |
477 | ||
478 | /* | |
479 | * Used only by tests/dso-data.c to reset the environment | |
480 | * for tests. I dont expect we should change this during | |
481 | * standard runtime. | |
482 | */ | |
483 | void reset_fd_limit(void) | |
c6580451 | 484 | { |
f3069249 JO |
485 | fd_limit = 0; |
486 | } | |
c6580451 | 487 | |
f3069249 JO |
488 | static bool may_cache_fd(void) |
489 | { | |
490 | if (!fd_limit) | |
491 | fd_limit = get_fd_limit(); | |
c6580451 | 492 | |
f3069249 | 493 | if (fd_limit == RLIM_INFINITY) |
c6580451 JO |
494 | return true; |
495 | ||
f3069249 | 496 | return fd_limit > (rlim_t) dso__data_open_cnt; |
c6580451 JO |
497 | } |
498 | ||
c1f9aa0a JO |
499 | /* |
500 | * Check and close LRU dso if we crossed allowed limit | |
501 | * for opened dso file descriptors. The limit is half | |
502 | * of the RLIMIT_NOFILE files opened. | |
503 | */ | |
c6580451 JO |
504 | static void check_data_close(void) |
505 | { | |
506 | bool cache_fd = may_cache_fd(); | |
507 | ||
508 | if (!cache_fd) | |
509 | close_first_dso(); | |
510 | } | |
511 | ||
c1f9aa0a JO |
512 | /** |
513 | * dso__data_close - Close DSO data file | |
514 | * @dso: dso object | |
515 | * | |
516 | * External interface to close @dso's data file descriptor. | |
517 | */ | |
eba5102d JO |
518 | void dso__data_close(struct dso *dso) |
519 | { | |
33bdedce | 520 | pthread_mutex_lock(&dso__data_open_lock); |
eba5102d | 521 | close_dso(dso); |
33bdedce | 522 | pthread_mutex_unlock(&dso__data_open_lock); |
eba5102d JO |
523 | } |
524 | ||
71ff824a | 525 | static void try_to_open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 526 | { |
631d34b5 | 527 | enum dso_binary_type binary_type_data[] = { |
cdd059d7 JO |
528 | DSO_BINARY_TYPE__BUILD_ID_CACHE, |
529 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
530 | DSO_BINARY_TYPE__NOT_FOUND, | |
531 | }; | |
532 | int i = 0; | |
533 | ||
53fa8eaa | 534 | if (dso->data.fd >= 0) |
71ff824a | 535 | return; |
53fa8eaa JO |
536 | |
537 | if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { | |
538 | dso->data.fd = open_dso(dso, machine); | |
c27697d6 | 539 | goto out; |
53fa8eaa | 540 | } |
cdd059d7 JO |
541 | |
542 | do { | |
5f70619d | 543 | dso->binary_type = binary_type_data[i++]; |
cdd059d7 | 544 | |
c27697d6 AH |
545 | dso->data.fd = open_dso(dso, machine); |
546 | if (dso->data.fd >= 0) | |
547 | goto out; | |
cdd059d7 | 548 | |
5f70619d | 549 | } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); |
c27697d6 AH |
550 | out: |
551 | if (dso->data.fd >= 0) | |
552 | dso->data.status = DSO_DATA_STATUS_OK; | |
553 | else | |
554 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
71ff824a NK |
555 | } |
556 | ||
557 | /** | |
4bb11d01 | 558 | * dso__data_get_fd - Get dso's data file descriptor |
71ff824a NK |
559 | * @dso: dso object |
560 | * @machine: machine object | |
561 | * | |
562 | * External interface to find dso's file, open it and | |
4bb11d01 NK |
563 | * returns file descriptor. It should be paired with |
564 | * dso__data_put_fd() if it returns non-negative value. | |
71ff824a | 565 | */ |
4bb11d01 | 566 | int dso__data_get_fd(struct dso *dso, struct machine *machine) |
71ff824a NK |
567 | { |
568 | if (dso->data.status == DSO_DATA_STATUS_ERROR) | |
569 | return -1; | |
cdd059d7 | 570 | |
4bb11d01 NK |
571 | if (pthread_mutex_lock(&dso__data_open_lock) < 0) |
572 | return -1; | |
573 | ||
71ff824a | 574 | try_to_open_dso(dso, machine); |
4bb11d01 NK |
575 | |
576 | if (dso->data.fd < 0) | |
577 | pthread_mutex_unlock(&dso__data_open_lock); | |
71ff824a | 578 | |
c27697d6 | 579 | return dso->data.fd; |
cdd059d7 JO |
580 | } |
581 | ||
4bb11d01 NK |
582 | void dso__data_put_fd(struct dso *dso __maybe_unused) |
583 | { | |
584 | pthread_mutex_unlock(&dso__data_open_lock); | |
585 | } | |
586 | ||
288be943 AH |
587 | bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) |
588 | { | |
589 | u32 flag = 1 << by; | |
590 | ||
591 | if (dso->data.status_seen & flag) | |
592 | return true; | |
593 | ||
594 | dso->data.status_seen |= flag; | |
595 | ||
596 | return false; | |
597 | } | |
598 | ||
cdd059d7 | 599 | static void |
8e67b725 | 600 | dso_cache__free(struct dso *dso) |
cdd059d7 | 601 | { |
8e67b725 | 602 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
603 | struct rb_node *next = rb_first(root); |
604 | ||
8e67b725 | 605 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
606 | while (next) { |
607 | struct dso_cache *cache; | |
608 | ||
609 | cache = rb_entry(next, struct dso_cache, rb_node); | |
610 | next = rb_next(&cache->rb_node); | |
611 | rb_erase(&cache->rb_node, root); | |
612 | free(cache); | |
613 | } | |
8e67b725 | 614 | pthread_mutex_unlock(&dso->lock); |
cdd059d7 JO |
615 | } |
616 | ||
8e67b725 | 617 | static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset) |
cdd059d7 | 618 | { |
8e67b725 | 619 | const struct rb_root *root = &dso->data.cache; |
3344996e ACM |
620 | struct rb_node * const *p = &root->rb_node; |
621 | const struct rb_node *parent = NULL; | |
cdd059d7 JO |
622 | struct dso_cache *cache; |
623 | ||
624 | while (*p != NULL) { | |
625 | u64 end; | |
626 | ||
627 | parent = *p; | |
628 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
629 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
630 | ||
631 | if (offset < cache->offset) | |
632 | p = &(*p)->rb_left; | |
633 | else if (offset >= end) | |
634 | p = &(*p)->rb_right; | |
635 | else | |
636 | return cache; | |
637 | } | |
8e67b725 | 638 | |
cdd059d7 JO |
639 | return NULL; |
640 | } | |
641 | ||
8e67b725 NK |
642 | static struct dso_cache * |
643 | dso_cache__insert(struct dso *dso, struct dso_cache *new) | |
cdd059d7 | 644 | { |
8e67b725 | 645 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
646 | struct rb_node **p = &root->rb_node; |
647 | struct rb_node *parent = NULL; | |
648 | struct dso_cache *cache; | |
649 | u64 offset = new->offset; | |
650 | ||
8e67b725 | 651 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
652 | while (*p != NULL) { |
653 | u64 end; | |
654 | ||
655 | parent = *p; | |
656 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
657 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
658 | ||
659 | if (offset < cache->offset) | |
660 | p = &(*p)->rb_left; | |
661 | else if (offset >= end) | |
662 | p = &(*p)->rb_right; | |
8e67b725 NK |
663 | else |
664 | goto out; | |
cdd059d7 JO |
665 | } |
666 | ||
667 | rb_link_node(&new->rb_node, parent, p); | |
668 | rb_insert_color(&new->rb_node, root); | |
8e67b725 NK |
669 | |
670 | cache = NULL; | |
671 | out: | |
672 | pthread_mutex_unlock(&dso->lock); | |
673 | return cache; | |
cdd059d7 JO |
674 | } |
675 | ||
676 | static ssize_t | |
677 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
678 | u8 *data, u64 size) | |
679 | { | |
680 | u64 cache_offset = offset - cache->offset; | |
681 | u64 cache_size = min(cache->size - cache_offset, size); | |
682 | ||
683 | memcpy(data, cache->data + cache_offset, cache_size); | |
684 | return cache_size; | |
685 | } | |
686 | ||
687 | static ssize_t | |
33bdedce NK |
688 | dso_cache__read(struct dso *dso, struct machine *machine, |
689 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
690 | { |
691 | struct dso_cache *cache; | |
8e67b725 | 692 | struct dso_cache *old; |
cdd059d7 | 693 | ssize_t ret; |
cdd059d7 JO |
694 | |
695 | do { | |
696 | u64 cache_offset; | |
697 | ||
cdd059d7 JO |
698 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); |
699 | if (!cache) | |
33bdedce NK |
700 | return -ENOMEM; |
701 | ||
702 | pthread_mutex_lock(&dso__data_open_lock); | |
703 | ||
704 | /* | |
705 | * dso->data.fd might be closed if other thread opened another | |
706 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
707 | */ | |
71ff824a NK |
708 | try_to_open_dso(dso, machine); |
709 | ||
33bdedce | 710 | if (dso->data.fd < 0) { |
71ff824a NK |
711 | ret = -errno; |
712 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
713 | break; | |
33bdedce | 714 | } |
cdd059d7 JO |
715 | |
716 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
cdd059d7 | 717 | |
c52686f9 | 718 | ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset); |
cdd059d7 JO |
719 | if (ret <= 0) |
720 | break; | |
721 | ||
722 | cache->offset = cache_offset; | |
723 | cache->size = ret; | |
33bdedce NK |
724 | } while (0); |
725 | ||
726 | pthread_mutex_unlock(&dso__data_open_lock); | |
727 | ||
728 | if (ret > 0) { | |
8e67b725 NK |
729 | old = dso_cache__insert(dso, cache); |
730 | if (old) { | |
731 | /* we lose the race */ | |
732 | free(cache); | |
733 | cache = old; | |
734 | } | |
cdd059d7 JO |
735 | |
736 | ret = dso_cache__memcpy(cache, offset, data, size); | |
33bdedce | 737 | } |
cdd059d7 JO |
738 | |
739 | if (ret <= 0) | |
740 | free(cache); | |
741 | ||
cdd059d7 JO |
742 | return ret; |
743 | } | |
744 | ||
33bdedce NK |
745 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, |
746 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
747 | { |
748 | struct dso_cache *cache; | |
749 | ||
8e67b725 | 750 | cache = dso_cache__find(dso, offset); |
cdd059d7 JO |
751 | if (cache) |
752 | return dso_cache__memcpy(cache, offset, data, size); | |
753 | else | |
33bdedce | 754 | return dso_cache__read(dso, machine, offset, data, size); |
cdd059d7 JO |
755 | } |
756 | ||
c1f9aa0a JO |
757 | /* |
758 | * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks | |
759 | * in the rb_tree. Any read to already cached data is served | |
760 | * by cached data. | |
761 | */ | |
33bdedce NK |
762 | static ssize_t cached_read(struct dso *dso, struct machine *machine, |
763 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
764 | { |
765 | ssize_t r = 0; | |
766 | u8 *p = data; | |
767 | ||
768 | do { | |
769 | ssize_t ret; | |
770 | ||
33bdedce | 771 | ret = dso_cache_read(dso, machine, offset, p, size); |
cdd059d7 JO |
772 | if (ret < 0) |
773 | return ret; | |
774 | ||
775 | /* Reached EOF, return what we have. */ | |
776 | if (!ret) | |
777 | break; | |
778 | ||
779 | BUG_ON(ret > size); | |
780 | ||
781 | r += ret; | |
782 | p += ret; | |
783 | offset += ret; | |
784 | size -= ret; | |
785 | ||
786 | } while (size); | |
787 | ||
788 | return r; | |
789 | } | |
790 | ||
33bdedce | 791 | static int data_file_size(struct dso *dso, struct machine *machine) |
c3fbd2a6 | 792 | { |
33bdedce | 793 | int ret = 0; |
c3fbd2a6 | 794 | struct stat st; |
6e81c74c | 795 | char sbuf[STRERR_BUFSIZE]; |
c3fbd2a6 | 796 | |
33bdedce NK |
797 | if (dso->data.file_size) |
798 | return 0; | |
799 | ||
71ff824a NK |
800 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
801 | return -1; | |
802 | ||
33bdedce NK |
803 | pthread_mutex_lock(&dso__data_open_lock); |
804 | ||
805 | /* | |
806 | * dso->data.fd might be closed if other thread opened another | |
807 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
808 | */ | |
71ff824a NK |
809 | try_to_open_dso(dso, machine); |
810 | ||
33bdedce | 811 | if (dso->data.fd < 0) { |
71ff824a NK |
812 | ret = -errno; |
813 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
814 | goto out; | |
c3fbd2a6 JO |
815 | } |
816 | ||
33bdedce NK |
817 | if (fstat(dso->data.fd, &st) < 0) { |
818 | ret = -errno; | |
819 | pr_err("dso cache fstat failed: %s\n", | |
c8b5f2c9 | 820 | str_error_r(errno, sbuf, sizeof(sbuf))); |
33bdedce NK |
821 | dso->data.status = DSO_DATA_STATUS_ERROR; |
822 | goto out; | |
823 | } | |
824 | dso->data.file_size = st.st_size; | |
825 | ||
826 | out: | |
827 | pthread_mutex_unlock(&dso__data_open_lock); | |
828 | return ret; | |
c3fbd2a6 JO |
829 | } |
830 | ||
6d363459 AH |
831 | /** |
832 | * dso__data_size - Return dso data size | |
833 | * @dso: dso object | |
834 | * @machine: machine object | |
835 | * | |
836 | * Return: dso data size | |
837 | */ | |
838 | off_t dso__data_size(struct dso *dso, struct machine *machine) | |
839 | { | |
33bdedce | 840 | if (data_file_size(dso, machine)) |
6d363459 AH |
841 | return -1; |
842 | ||
843 | /* For now just estimate dso data size is close to file size */ | |
844 | return dso->data.file_size; | |
845 | } | |
846 | ||
33bdedce NK |
847 | static ssize_t data_read_offset(struct dso *dso, struct machine *machine, |
848 | u64 offset, u8 *data, ssize_t size) | |
c3fbd2a6 | 849 | { |
33bdedce | 850 | if (data_file_size(dso, machine)) |
c3fbd2a6 JO |
851 | return -1; |
852 | ||
853 | /* Check the offset sanity. */ | |
854 | if (offset > dso->data.file_size) | |
855 | return -1; | |
856 | ||
857 | if (offset + size < offset) | |
858 | return -1; | |
859 | ||
33bdedce | 860 | return cached_read(dso, machine, offset, data, size); |
c3fbd2a6 JO |
861 | } |
862 | ||
c1f9aa0a JO |
863 | /** |
864 | * dso__data_read_offset - Read data from dso file offset | |
865 | * @dso: dso object | |
866 | * @machine: machine object | |
867 | * @offset: file offset | |
868 | * @data: buffer to store data | |
869 | * @size: size of the @data buffer | |
870 | * | |
871 | * External interface to read data from dso file offset. Open | |
872 | * dso data file and use cached_read to get the data. | |
873 | */ | |
c3fbd2a6 JO |
874 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, |
875 | u64 offset, u8 *data, ssize_t size) | |
876 | { | |
33bdedce | 877 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
c3fbd2a6 JO |
878 | return -1; |
879 | ||
33bdedce | 880 | return data_read_offset(dso, machine, offset, data, size); |
c3fbd2a6 JO |
881 | } |
882 | ||
c1f9aa0a JO |
883 | /** |
884 | * dso__data_read_addr - Read data from dso address | |
885 | * @dso: dso object | |
886 | * @machine: machine object | |
887 | * @add: virtual memory address | |
888 | * @data: buffer to store data | |
889 | * @size: size of the @data buffer | |
890 | * | |
891 | * External interface to read data from dso address. | |
892 | */ | |
cdd059d7 JO |
893 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, |
894 | struct machine *machine, u64 addr, | |
895 | u8 *data, ssize_t size) | |
896 | { | |
897 | u64 offset = map->map_ip(map, addr); | |
898 | return dso__data_read_offset(dso, machine, offset, data, size); | |
899 | } | |
900 | ||
901 | struct map *dso__new_map(const char *name) | |
902 | { | |
903 | struct map *map = NULL; | |
904 | struct dso *dso = dso__new(name); | |
905 | ||
906 | if (dso) | |
907 | map = map__new2(0, dso, MAP__FUNCTION); | |
908 | ||
909 | return map; | |
910 | } | |
911 | ||
459ce518 ACM |
912 | struct dso *machine__findnew_kernel(struct machine *machine, const char *name, |
913 | const char *short_name, int dso_type) | |
cdd059d7 JO |
914 | { |
915 | /* | |
916 | * The kernel dso could be created by build_id processing. | |
917 | */ | |
aa7cc2ae | 918 | struct dso *dso = machine__findnew_dso(machine, name); |
cdd059d7 JO |
919 | |
920 | /* | |
921 | * We need to run this in all cases, since during the build_id | |
922 | * processing we had no idea this was the kernel dso. | |
923 | */ | |
924 | if (dso != NULL) { | |
58a98c9c | 925 | dso__set_short_name(dso, short_name, false); |
cdd059d7 JO |
926 | dso->kernel = dso_type; |
927 | } | |
928 | ||
929 | return dso; | |
930 | } | |
931 | ||
4598a0a6 WL |
932 | /* |
933 | * Find a matching entry and/or link current entry to RB tree. | |
934 | * Either one of the dso or name parameter must be non-NULL or the | |
935 | * function will not work. | |
936 | */ | |
e8807844 ACM |
937 | static struct dso *__dso__findlink_by_longname(struct rb_root *root, |
938 | struct dso *dso, const char *name) | |
4598a0a6 WL |
939 | { |
940 | struct rb_node **p = &root->rb_node; | |
941 | struct rb_node *parent = NULL; | |
942 | ||
943 | if (!name) | |
944 | name = dso->long_name; | |
945 | /* | |
946 | * Find node with the matching name | |
947 | */ | |
948 | while (*p) { | |
949 | struct dso *this = rb_entry(*p, struct dso, rb_node); | |
950 | int rc = strcmp(name, this->long_name); | |
951 | ||
952 | parent = *p; | |
953 | if (rc == 0) { | |
954 | /* | |
955 | * In case the new DSO is a duplicate of an existing | |
0f5e1558 | 956 | * one, print a one-time warning & put the new entry |
4598a0a6 WL |
957 | * at the end of the list of duplicates. |
958 | */ | |
959 | if (!dso || (dso == this)) | |
960 | return this; /* Find matching dso */ | |
961 | /* | |
962 | * The core kernel DSOs may have duplicated long name. | |
963 | * In this case, the short name should be different. | |
964 | * Comparing the short names to differentiate the DSOs. | |
965 | */ | |
966 | rc = strcmp(dso->short_name, this->short_name); | |
967 | if (rc == 0) { | |
968 | pr_err("Duplicated dso name: %s\n", name); | |
969 | return NULL; | |
970 | } | |
971 | } | |
972 | if (rc < 0) | |
973 | p = &parent->rb_left; | |
974 | else | |
975 | p = &parent->rb_right; | |
976 | } | |
977 | if (dso) { | |
978 | /* Add new node and rebalance tree */ | |
979 | rb_link_node(&dso->rb_node, parent, p); | |
980 | rb_insert_color(&dso->rb_node, root); | |
e266a753 | 981 | dso->root = root; |
4598a0a6 WL |
982 | } |
983 | return NULL; | |
984 | } | |
985 | ||
e8807844 ACM |
986 | static inline struct dso *__dso__find_by_longname(struct rb_root *root, |
987 | const char *name) | |
4598a0a6 | 988 | { |
e8807844 | 989 | return __dso__findlink_by_longname(root, NULL, name); |
4598a0a6 WL |
990 | } |
991 | ||
bf4414ae | 992 | void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 | 993 | { |
e266a753 AH |
994 | struct rb_root *root = dso->root; |
995 | ||
cdd059d7 JO |
996 | if (name == NULL) |
997 | return; | |
7e155d4d ACM |
998 | |
999 | if (dso->long_name_allocated) | |
bf4414ae | 1000 | free((char *)dso->long_name); |
7e155d4d | 1001 | |
e266a753 AH |
1002 | if (root) { |
1003 | rb_erase(&dso->rb_node, root); | |
1004 | /* | |
1005 | * __dso__findlink_by_longname() isn't guaranteed to add it | |
1006 | * back, so a clean removal is required here. | |
1007 | */ | |
1008 | RB_CLEAR_NODE(&dso->rb_node); | |
1009 | dso->root = NULL; | |
1010 | } | |
1011 | ||
7e155d4d ACM |
1012 | dso->long_name = name; |
1013 | dso->long_name_len = strlen(name); | |
1014 | dso->long_name_allocated = name_allocated; | |
e266a753 AH |
1015 | |
1016 | if (root) | |
1017 | __dso__findlink_by_longname(root, dso, NULL); | |
cdd059d7 JO |
1018 | } |
1019 | ||
58a98c9c | 1020 | void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
1021 | { |
1022 | if (name == NULL) | |
1023 | return; | |
58a98c9c AH |
1024 | |
1025 | if (dso->short_name_allocated) | |
1026 | free((char *)dso->short_name); | |
1027 | ||
1028 | dso->short_name = name; | |
1029 | dso->short_name_len = strlen(name); | |
1030 | dso->short_name_allocated = name_allocated; | |
cdd059d7 JO |
1031 | } |
1032 | ||
1033 | static void dso__set_basename(struct dso *dso) | |
1034 | { | |
ac5e7f84 SE |
1035 | /* |
1036 | * basename() may modify path buffer, so we must pass | |
1037 | * a copy. | |
1038 | */ | |
1039 | char *base, *lname = strdup(dso->long_name); | |
1040 | ||
1041 | if (!lname) | |
1042 | return; | |
1043 | ||
1044 | /* | |
1045 | * basename() may return a pointer to internal | |
1046 | * storage which is reused in subsequent calls | |
1047 | * so copy the result. | |
1048 | */ | |
1049 | base = strdup(basename(lname)); | |
1050 | ||
1051 | free(lname); | |
1052 | ||
1053 | if (!base) | |
1054 | return; | |
1055 | ||
1056 | dso__set_short_name(dso, base, true); | |
cdd059d7 JO |
1057 | } |
1058 | ||
1059 | int dso__name_len(const struct dso *dso) | |
1060 | { | |
1061 | if (!dso) | |
1062 | return strlen("[unknown]"); | |
bb963e16 | 1063 | if (verbose > 0) |
cdd059d7 JO |
1064 | return dso->long_name_len; |
1065 | ||
1066 | return dso->short_name_len; | |
1067 | } | |
1068 | ||
1069 | bool dso__loaded(const struct dso *dso, enum map_type type) | |
1070 | { | |
1071 | return dso->loaded & (1 << type); | |
1072 | } | |
1073 | ||
1074 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) | |
1075 | { | |
1076 | return dso->sorted_by_name & (1 << type); | |
1077 | } | |
1078 | ||
1079 | void dso__set_sorted_by_name(struct dso *dso, enum map_type type) | |
1080 | { | |
1081 | dso->sorted_by_name |= (1 << type); | |
1082 | } | |
1083 | ||
1084 | struct dso *dso__new(const char *name) | |
1085 | { | |
1086 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
1087 | ||
1088 | if (dso != NULL) { | |
1089 | int i; | |
1090 | strcpy(dso->name, name); | |
7e155d4d | 1091 | dso__set_long_name(dso, dso->name, false); |
58a98c9c | 1092 | dso__set_short_name(dso, dso->name, false); |
cdd059d7 JO |
1093 | for (i = 0; i < MAP__NR_TYPES; ++i) |
1094 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; | |
ca40e2af | 1095 | dso->data.cache = RB_ROOT; |
53fa8eaa | 1096 | dso->data.fd = -1; |
c27697d6 | 1097 | dso->data.status = DSO_DATA_STATUS_UNKNOWN; |
cdd059d7 | 1098 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
5f70619d | 1099 | dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; |
c6d8f2a4 | 1100 | dso->is_64_bit = (sizeof(void *) == 8); |
cdd059d7 | 1101 | dso->loaded = 0; |
0131c4ec | 1102 | dso->rel = 0; |
cdd059d7 JO |
1103 | dso->sorted_by_name = 0; |
1104 | dso->has_build_id = 0; | |
2cc9d0ef | 1105 | dso->has_srcline = 1; |
906049c8 | 1106 | dso->a2l_fails = 1; |
cdd059d7 JO |
1107 | dso->kernel = DSO_TYPE_USER; |
1108 | dso->needs_swap = DSO_SWAP__UNSET; | |
4598a0a6 | 1109 | RB_CLEAR_NODE(&dso->rb_node); |
e266a753 | 1110 | dso->root = NULL; |
cdd059d7 | 1111 | INIT_LIST_HEAD(&dso->node); |
eba5102d | 1112 | INIT_LIST_HEAD(&dso->data.open_entry); |
4a936edc | 1113 | pthread_mutex_init(&dso->lock, NULL); |
7100810a | 1114 | refcount_set(&dso->refcnt, 1); |
cdd059d7 JO |
1115 | } |
1116 | ||
1117 | return dso; | |
1118 | } | |
1119 | ||
1120 | void dso__delete(struct dso *dso) | |
1121 | { | |
1122 | int i; | |
4598a0a6 WL |
1123 | |
1124 | if (!RB_EMPTY_NODE(&dso->rb_node)) | |
1125 | pr_err("DSO %s is still in rbtree when being deleted!\n", | |
1126 | dso->long_name); | |
cdd059d7 JO |
1127 | for (i = 0; i < MAP__NR_TYPES; ++i) |
1128 | symbols__delete(&dso->symbols[i]); | |
ee021d42 ACM |
1129 | |
1130 | if (dso->short_name_allocated) { | |
04662523 | 1131 | zfree((char **)&dso->short_name); |
ee021d42 ACM |
1132 | dso->short_name_allocated = false; |
1133 | } | |
1134 | ||
1135 | if (dso->long_name_allocated) { | |
04662523 | 1136 | zfree((char **)&dso->long_name); |
ee021d42 ACM |
1137 | dso->long_name_allocated = false; |
1138 | } | |
1139 | ||
53fa8eaa | 1140 | dso__data_close(dso); |
cfe9174f | 1141 | auxtrace_cache__free(dso->auxtrace_cache); |
8e67b725 | 1142 | dso_cache__free(dso); |
454ff00f | 1143 | dso__free_a2l(dso); |
04662523 | 1144 | zfree(&dso->symsrc_filename); |
4a936edc | 1145 | pthread_mutex_destroy(&dso->lock); |
cdd059d7 JO |
1146 | free(dso); |
1147 | } | |
1148 | ||
d3a7c489 ACM |
1149 | struct dso *dso__get(struct dso *dso) |
1150 | { | |
1151 | if (dso) | |
7100810a | 1152 | refcount_inc(&dso->refcnt); |
d3a7c489 ACM |
1153 | return dso; |
1154 | } | |
1155 | ||
1156 | void dso__put(struct dso *dso) | |
1157 | { | |
7100810a | 1158 | if (dso && refcount_dec_and_test(&dso->refcnt)) |
d3a7c489 ACM |
1159 | dso__delete(dso); |
1160 | } | |
1161 | ||
cdd059d7 JO |
1162 | void dso__set_build_id(struct dso *dso, void *build_id) |
1163 | { | |
1164 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
1165 | dso->has_build_id = 1; | |
1166 | } | |
1167 | ||
1168 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
1169 | { | |
1170 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
1171 | } | |
1172 | ||
1173 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
1174 | { | |
1175 | char path[PATH_MAX]; | |
1176 | ||
1177 | if (machine__is_default_guest(machine)) | |
1178 | return; | |
1179 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
1180 | if (sysfs__read_build_id(path, dso->build_id, | |
1181 | sizeof(dso->build_id)) == 0) | |
1182 | dso->has_build_id = true; | |
1183 | } | |
1184 | ||
1185 | int dso__kernel_module_get_build_id(struct dso *dso, | |
1186 | const char *root_dir) | |
1187 | { | |
1188 | char filename[PATH_MAX]; | |
1189 | /* | |
1190 | * kernel module short names are of the form "[module]" and | |
1191 | * we need just "module" here. | |
1192 | */ | |
1193 | const char *name = dso->short_name + 1; | |
1194 | ||
1195 | snprintf(filename, sizeof(filename), | |
1196 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
1197 | root_dir, (int)strlen(name) - 1, name); | |
1198 | ||
1199 | if (sysfs__read_build_id(filename, dso->build_id, | |
1200 | sizeof(dso->build_id)) == 0) | |
1201 | dso->has_build_id = true; | |
1202 | ||
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
1207 | { | |
1208 | bool have_build_id = false; | |
1209 | struct dso *pos; | |
1210 | ||
1211 | list_for_each_entry(pos, head, node) { | |
6ae98ba6 | 1212 | if (with_hits && !pos->hit && !dso__is_vdso(pos)) |
cdd059d7 JO |
1213 | continue; |
1214 | if (pos->has_build_id) { | |
1215 | have_build_id = true; | |
1216 | continue; | |
1217 | } | |
1218 | if (filename__read_build_id(pos->long_name, pos->build_id, | |
1219 | sizeof(pos->build_id)) > 0) { | |
1220 | have_build_id = true; | |
1221 | pos->has_build_id = true; | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | return have_build_id; | |
1226 | } | |
1227 | ||
e8807844 | 1228 | void __dsos__add(struct dsos *dsos, struct dso *dso) |
cdd059d7 | 1229 | { |
8fa7d87f | 1230 | list_add_tail(&dso->node, &dsos->head); |
e8807844 | 1231 | __dso__findlink_by_longname(&dsos->root, dso, NULL); |
d3a7c489 ACM |
1232 | /* |
1233 | * It is now in the linked list, grab a reference, then garbage collect | |
1234 | * this when needing memory, by looking at LRU dso instances in the | |
1235 | * list with atomic_read(&dso->refcnt) == 1, i.e. no references | |
1236 | * anywhere besides the one for the list, do, under a lock for the | |
1237 | * list: remove it from the list, then a dso__put(), that probably will | |
1238 | * be the last and will then call dso__delete(), end of life. | |
1239 | * | |
1240 | * That, or at the end of the 'struct machine' lifetime, when all | |
1241 | * 'struct dso' instances will be removed from the list, in | |
1242 | * dsos__exit(), if they have no other reference from some other data | |
1243 | * structure. | |
1244 | * | |
1245 | * E.g.: after processing a 'perf.data' file and storing references | |
1246 | * to objects instantiated while processing events, we will have | |
1247 | * references to the 'thread', 'map', 'dso' structs all from 'struct | |
1248 | * hist_entry' instances, but we may not need anything not referenced, | |
1249 | * so we might as well call machines__exit()/machines__delete() and | |
1250 | * garbage collect it. | |
1251 | */ | |
1252 | dso__get(dso); | |
e8807844 ACM |
1253 | } |
1254 | ||
1255 | void dsos__add(struct dsos *dsos, struct dso *dso) | |
1256 | { | |
1257 | pthread_rwlock_wrlock(&dsos->lock); | |
1258 | __dsos__add(dsos, dso); | |
1259 | pthread_rwlock_unlock(&dsos->lock); | |
cdd059d7 JO |
1260 | } |
1261 | ||
e8807844 | 1262 | struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
cdd059d7 JO |
1263 | { |
1264 | struct dso *pos; | |
1265 | ||
f9ceffb6 | 1266 | if (cmp_short) { |
8fa7d87f | 1267 | list_for_each_entry(pos, &dsos->head, node) |
f9ceffb6 WL |
1268 | if (strcmp(pos->short_name, name) == 0) |
1269 | return pos; | |
1270 | return NULL; | |
1271 | } | |
e8807844 | 1272 | return __dso__find_by_longname(&dsos->root, name); |
cdd059d7 JO |
1273 | } |
1274 | ||
e8807844 ACM |
1275 | struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
1276 | { | |
1277 | struct dso *dso; | |
1278 | pthread_rwlock_rdlock(&dsos->lock); | |
1279 | dso = __dsos__find(dsos, name, cmp_short); | |
1280 | pthread_rwlock_unlock(&dsos->lock); | |
1281 | return dso; | |
1282 | } | |
1283 | ||
1284 | struct dso *__dsos__addnew(struct dsos *dsos, const char *name) | |
cdd059d7 | 1285 | { |
701d8d7f | 1286 | struct dso *dso = dso__new(name); |
cdd059d7 | 1287 | |
701d8d7f | 1288 | if (dso != NULL) { |
e8807844 | 1289 | __dsos__add(dsos, dso); |
701d8d7f | 1290 | dso__set_basename(dso); |
82de26ab MH |
1291 | /* Put dso here because __dsos_add already got it */ |
1292 | dso__put(dso); | |
cdd059d7 | 1293 | } |
cdd059d7 JO |
1294 | return dso; |
1295 | } | |
1296 | ||
701d8d7f JO |
1297 | struct dso *__dsos__findnew(struct dsos *dsos, const char *name) |
1298 | { | |
e8807844 ACM |
1299 | struct dso *dso = __dsos__find(dsos, name, false); |
1300 | ||
1301 | return dso ? dso : __dsos__addnew(dsos, name); | |
1302 | } | |
701d8d7f | 1303 | |
e8807844 ACM |
1304 | struct dso *dsos__findnew(struct dsos *dsos, const char *name) |
1305 | { | |
1306 | struct dso *dso; | |
1307 | pthread_rwlock_wrlock(&dsos->lock); | |
d3a7c489 | 1308 | dso = dso__get(__dsos__findnew(dsos, name)); |
e8807844 ACM |
1309 | pthread_rwlock_unlock(&dsos->lock); |
1310 | return dso; | |
701d8d7f JO |
1311 | } |
1312 | ||
cdd059d7 | 1313 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
417c2ff6 | 1314 | bool (skip)(struct dso *dso, int parm), int parm) |
cdd059d7 JO |
1315 | { |
1316 | struct dso *pos; | |
1317 | size_t ret = 0; | |
1318 | ||
1319 | list_for_each_entry(pos, head, node) { | |
417c2ff6 | 1320 | if (skip && skip(pos, parm)) |
cdd059d7 JO |
1321 | continue; |
1322 | ret += dso__fprintf_buildid(pos, fp); | |
1323 | ret += fprintf(fp, " %s\n", pos->long_name); | |
1324 | } | |
1325 | return ret; | |
1326 | } | |
1327 | ||
1328 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
1329 | { | |
1330 | struct dso *pos; | |
1331 | size_t ret = 0; | |
1332 | ||
1333 | list_for_each_entry(pos, head, node) { | |
1334 | int i; | |
1335 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
1336 | ret += dso__fprintf(pos, i, fp); | |
1337 | } | |
1338 | ||
1339 | return ret; | |
1340 | } | |
1341 | ||
1342 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
1343 | { | |
b5d8bbe8 | 1344 | char sbuild_id[SBUILD_ID_SIZE]; |
cdd059d7 JO |
1345 | |
1346 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1347 | return fprintf(fp, "%s", sbuild_id); | |
1348 | } | |
1349 | ||
1350 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) | |
1351 | { | |
1352 | struct rb_node *nd; | |
1353 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
1354 | ||
1355 | if (dso->short_name != dso->long_name) | |
1356 | ret += fprintf(fp, "%s, ", dso->long_name); | |
1357 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
919d590f | 1358 | dso__loaded(dso, type) ? "" : "NOT "); |
cdd059d7 JO |
1359 | ret += dso__fprintf_buildid(dso, fp); |
1360 | ret += fprintf(fp, ")\n"); | |
1361 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { | |
1362 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
1363 | ret += symbol__fprintf(pos, fp); | |
1364 | } | |
1365 | ||
1366 | return ret; | |
1367 | } | |
2b5b8bb2 AH |
1368 | |
1369 | enum dso_type dso__type(struct dso *dso, struct machine *machine) | |
1370 | { | |
1371 | int fd; | |
4bb11d01 | 1372 | enum dso_type type = DSO__TYPE_UNKNOWN; |
2b5b8bb2 | 1373 | |
4bb11d01 NK |
1374 | fd = dso__data_get_fd(dso, machine); |
1375 | if (fd >= 0) { | |
1376 | type = dso__type_fd(fd); | |
1377 | dso__data_put_fd(dso); | |
1378 | } | |
2b5b8bb2 | 1379 | |
4bb11d01 | 1380 | return type; |
2b5b8bb2 | 1381 | } |
18425f13 ACM |
1382 | |
1383 | int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) | |
1384 | { | |
1385 | int idx, errnum = dso->load_errno; | |
1386 | /* | |
1387 | * This must have a same ordering as the enum dso_load_errno. | |
1388 | */ | |
1389 | static const char *dso_load__error_str[] = { | |
1390 | "Internal tools/perf/ library error", | |
1391 | "Invalid ELF file", | |
1392 | "Can not read build id", | |
1393 | "Mismatching build id", | |
1394 | "Decompression failure", | |
1395 | }; | |
1396 | ||
1397 | BUG_ON(buflen == 0); | |
1398 | ||
1399 | if (errnum >= 0) { | |
c8b5f2c9 | 1400 | const char *err = str_error_r(errnum, buf, buflen); |
18425f13 ACM |
1401 | |
1402 | if (err != buf) | |
1403 | scnprintf(buf, buflen, "%s", err); | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END) | |
1409 | return -1; | |
1410 | ||
1411 | idx = errnum - __DSO_LOAD_ERRNO__START; | |
1412 | scnprintf(buf, buflen, "%s", dso_load__error_str[idx]); | |
1413 | return 0; | |
1414 | } |