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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" |
cfe9174f | 7 | #include "auxtrace.h" |
cdd059d7 JO |
8 | #include "util.h" |
9 | #include "debug.h" | |
10 | ||
11 | char dso__symtab_origin(const struct dso *dso) | |
12 | { | |
13 | static const char origin[] = { | |
9cd00941 RRD |
14 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
15 | [DSO_BINARY_TYPE__VMLINUX] = 'v', | |
16 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
17 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
18 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
19 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', | |
20 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
21 | [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', | |
22 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
23 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
24 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
c00c48fc | 25 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm', |
9cd00941 RRD |
26 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', |
27 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
c00c48fc | 28 | [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', |
9cd00941 | 29 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', |
cdd059d7 JO |
30 | }; |
31 | ||
32 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
33 | return '!'; | |
34 | return origin[dso->symtab_type]; | |
35 | } | |
36 | ||
ee4e9625 ACM |
37 | int dso__read_binary_type_filename(const struct dso *dso, |
38 | enum dso_binary_type type, | |
39 | char *root_dir, char *filename, size_t size) | |
cdd059d7 JO |
40 | { |
41 | char build_id_hex[BUILD_ID_SIZE * 2 + 1]; | |
42 | int ret = 0; | |
972f393b | 43 | size_t len; |
cdd059d7 JO |
44 | |
45 | switch (type) { | |
46 | case DSO_BINARY_TYPE__DEBUGLINK: { | |
47 | char *debuglink; | |
48 | ||
dc6254cf VK |
49 | len = __symbol__join_symfs(filename, size, dso->long_name); |
50 | debuglink = filename + len; | |
7d2a5122 | 51 | while (debuglink != filename && *debuglink != '/') |
cdd059d7 JO |
52 | debuglink--; |
53 | if (*debuglink == '/') | |
54 | debuglink++; | |
dc6254cf | 55 | ret = filename__read_debuglink(filename, debuglink, |
0d3dc5e8 | 56 | size - (debuglink - filename)); |
cdd059d7 JO |
57 | } |
58 | break; | |
59 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: | |
60 | /* skip the locally configured cache if a symfs is given */ | |
61 | if (symbol_conf.symfs[0] || | |
7d2a5122 | 62 | (dso__build_id_filename(dso, filename, size) == NULL)) |
cdd059d7 JO |
63 | ret = -1; |
64 | break; | |
65 | ||
66 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
972f393b ACM |
67 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
68 | snprintf(filename + len, size - len, "%s.debug", dso->long_name); | |
cdd059d7 JO |
69 | break; |
70 | ||
71 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
972f393b ACM |
72 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
73 | snprintf(filename + len, size - len, "%s", dso->long_name); | |
cdd059d7 JO |
74 | break; |
75 | ||
9cd00941 RRD |
76 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
77 | { | |
bf4414ae | 78 | const char *last_slash; |
9cd00941 RRD |
79 | size_t dir_size; |
80 | ||
81 | last_slash = dso->long_name + dso->long_name_len; | |
82 | while (last_slash != dso->long_name && *last_slash != '/') | |
83 | last_slash--; | |
84 | ||
972f393b | 85 | len = __symbol__join_symfs(filename, size, ""); |
9cd00941 RRD |
86 | dir_size = last_slash - dso->long_name + 2; |
87 | if (dir_size > (size - len)) { | |
88 | ret = -1; | |
89 | break; | |
90 | } | |
7d2a5122 ACM |
91 | len += scnprintf(filename + len, dir_size, "%s", dso->long_name); |
92 | len += scnprintf(filename + len , size - len, ".debug%s", | |
9cd00941 RRD |
93 | last_slash); |
94 | break; | |
95 | } | |
96 | ||
cdd059d7 JO |
97 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
98 | if (!dso->has_build_id) { | |
99 | ret = -1; | |
100 | break; | |
101 | } | |
102 | ||
103 | build_id__sprintf(dso->build_id, | |
104 | sizeof(dso->build_id), | |
105 | build_id_hex); | |
972f393b ACM |
106 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); |
107 | snprintf(filename + len, size - len, "%.2s/%s.debug", | |
108 | build_id_hex, build_id_hex + 2); | |
cdd059d7 JO |
109 | break; |
110 | ||
39b12f78 AH |
111 | case DSO_BINARY_TYPE__VMLINUX: |
112 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
cdd059d7 | 113 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
972f393b | 114 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
115 | break; |
116 | ||
117 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 118 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
972f393b ACM |
119 | path__join3(filename, size, symbol_conf.symfs, |
120 | root_dir, dso->long_name); | |
cdd059d7 JO |
121 | break; |
122 | ||
123 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
c00c48fc | 124 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
972f393b | 125 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
126 | break; |
127 | ||
8e0cf965 AH |
128 | case DSO_BINARY_TYPE__KCORE: |
129 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
7d2a5122 | 130 | snprintf(filename, size, "%s", dso->long_name); |
8e0cf965 AH |
131 | break; |
132 | ||
cdd059d7 JO |
133 | default: |
134 | case DSO_BINARY_TYPE__KALLSYMS: | |
cdd059d7 | 135 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
cdd059d7 JO |
136 | case DSO_BINARY_TYPE__JAVA_JIT: |
137 | case DSO_BINARY_TYPE__NOT_FOUND: | |
138 | ret = -1; | |
139 | break; | |
140 | } | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
c00c48fc NK |
145 | static const struct { |
146 | const char *fmt; | |
147 | int (*decompress)(const char *input, int output); | |
148 | } compressions[] = { | |
e92ce12e NK |
149 | #ifdef HAVE_ZLIB_SUPPORT |
150 | { "gz", gzip_decompress_to_file }, | |
80a32e5b JO |
151 | #endif |
152 | #ifdef HAVE_LZMA_SUPPORT | |
153 | { "xz", lzma_decompress_to_file }, | |
e92ce12e NK |
154 | #endif |
155 | { NULL, NULL }, | |
c00c48fc NK |
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 | ||
1f121b03 | 169 | bool is_kernel_module(const char *pathname, int cpumode) |
c00c48fc | 170 | { |
8dee9ff1 | 171 | struct kmod_path m; |
1f121b03 WN |
172 | int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK; |
173 | ||
174 | WARN_ONCE(mode != cpumode, | |
175 | "Internal error: passing unmasked cpumode (%x) to is_kernel_module", | |
176 | cpumode); | |
177 | ||
178 | switch (mode) { | |
179 | case PERF_RECORD_MISC_USER: | |
180 | case PERF_RECORD_MISC_HYPERVISOR: | |
181 | case PERF_RECORD_MISC_GUEST_USER: | |
182 | return false; | |
183 | /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */ | |
184 | default: | |
185 | if (kmod_path__parse(&m, pathname)) { | |
186 | pr_err("Failed to check whether %s is a kernel module or not. Assume it is.", | |
187 | pathname); | |
188 | return true; | |
189 | } | |
190 | } | |
c00c48fc | 191 | |
8dee9ff1 | 192 | return m.kmod; |
c00c48fc NK |
193 | } |
194 | ||
195 | bool decompress_to_file(const char *ext, const char *filename, int output_fd) | |
196 | { | |
197 | unsigned i; | |
198 | ||
199 | for (i = 0; compressions[i].fmt; i++) { | |
200 | if (!strcmp(ext, compressions[i].fmt)) | |
201 | return !compressions[i].decompress(filename, | |
202 | output_fd); | |
203 | } | |
204 | return false; | |
205 | } | |
206 | ||
207 | bool dso__needs_decompress(struct dso *dso) | |
208 | { | |
209 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || | |
210 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
211 | } | |
212 | ||
3c8a67f5 JO |
213 | /* |
214 | * Parses kernel module specified in @path and updates | |
215 | * @m argument like: | |
216 | * | |
217 | * @comp - true if @path contains supported compression suffix, | |
218 | * false otherwise | |
219 | * @kmod - true if @path contains '.ko' suffix in right position, | |
220 | * false otherwise | |
221 | * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name | |
222 | * of the kernel module without suffixes, otherwise strudup-ed | |
223 | * base name of @path | |
224 | * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string | |
225 | * the compression suffix | |
226 | * | |
227 | * Returns 0 if there's no strdup error, -ENOMEM otherwise. | |
228 | */ | |
229 | int __kmod_path__parse(struct kmod_path *m, const char *path, | |
230 | bool alloc_name, bool alloc_ext) | |
231 | { | |
232 | const char *name = strrchr(path, '/'); | |
233 | const char *ext = strrchr(path, '.'); | |
1f121b03 | 234 | bool is_simple_name = false; |
3c8a67f5 JO |
235 | |
236 | memset(m, 0x0, sizeof(*m)); | |
237 | name = name ? name + 1 : path; | |
238 | ||
1f121b03 WN |
239 | /* |
240 | * '.' is also a valid character for module name. For example: | |
241 | * [aaa.bbb] is a valid module name. '[' should have higher | |
242 | * priority than '.ko' suffix. | |
243 | * | |
244 | * The kernel names are from machine__mmap_name. Such | |
245 | * name should belong to kernel itself, not kernel module. | |
246 | */ | |
247 | if (name[0] == '[') { | |
248 | is_simple_name = true; | |
249 | if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) || | |
250 | (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) || | |
251 | (strncmp(name, "[vdso]", 6) == 0) || | |
252 | (strncmp(name, "[vsyscall]", 10) == 0)) { | |
253 | m->kmod = false; | |
254 | ||
255 | } else | |
256 | m->kmod = true; | |
257 | } | |
258 | ||
3c8a67f5 | 259 | /* No extension, just return name. */ |
1f121b03 | 260 | if ((ext == NULL) || is_simple_name) { |
3c8a67f5 JO |
261 | if (alloc_name) { |
262 | m->name = strdup(name); | |
263 | return m->name ? 0 : -ENOMEM; | |
264 | } | |
265 | return 0; | |
266 | } | |
267 | ||
268 | if (is_supported_compression(ext + 1)) { | |
269 | m->comp = true; | |
270 | ext -= 3; | |
271 | } | |
272 | ||
273 | /* Check .ko extension only if there's enough name left. */ | |
274 | if (ext > name) | |
275 | m->kmod = !strncmp(ext, ".ko", 3); | |
276 | ||
277 | if (alloc_name) { | |
278 | if (m->kmod) { | |
279 | if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1) | |
280 | return -ENOMEM; | |
281 | } else { | |
282 | if (asprintf(&m->name, "%s", name) == -1) | |
283 | return -ENOMEM; | |
284 | } | |
285 | ||
286 | strxfrchar(m->name, '-', '_'); | |
287 | } | |
288 | ||
289 | if (alloc_ext && m->comp) { | |
290 | m->ext = strdup(ext + 4); | |
291 | if (!m->ext) { | |
292 | free((void *) m->name); | |
293 | return -ENOMEM; | |
294 | } | |
295 | } | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
eba5102d | 300 | /* |
bda6ee4a | 301 | * Global list of open DSOs and the counter. |
eba5102d JO |
302 | */ |
303 | static LIST_HEAD(dso__data_open); | |
bda6ee4a | 304 | static long dso__data_open_cnt; |
33bdedce | 305 | static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER; |
eba5102d JO |
306 | |
307 | static void dso__list_add(struct dso *dso) | |
308 | { | |
309 | list_add_tail(&dso->data.open_entry, &dso__data_open); | |
bda6ee4a | 310 | dso__data_open_cnt++; |
eba5102d JO |
311 | } |
312 | ||
313 | static void dso__list_del(struct dso *dso) | |
314 | { | |
315 | list_del(&dso->data.open_entry); | |
bda6ee4a JO |
316 | WARN_ONCE(dso__data_open_cnt <= 0, |
317 | "DSO data fd counter out of bounds."); | |
318 | dso__data_open_cnt--; | |
eba5102d JO |
319 | } |
320 | ||
a08cae03 JO |
321 | static void close_first_dso(void); |
322 | ||
323 | static int do_open(char *name) | |
324 | { | |
325 | int fd; | |
6e81c74c | 326 | char sbuf[STRERR_BUFSIZE]; |
a08cae03 JO |
327 | |
328 | do { | |
329 | fd = open(name, O_RDONLY); | |
330 | if (fd >= 0) | |
331 | return fd; | |
332 | ||
a3c0cc2a | 333 | pr_debug("dso open failed: %s\n", |
6e81c74c | 334 | strerror_r(errno, sbuf, sizeof(sbuf))); |
a08cae03 JO |
335 | if (!dso__data_open_cnt || errno != EMFILE) |
336 | break; | |
337 | ||
338 | close_first_dso(); | |
339 | } while (1); | |
340 | ||
341 | return -1; | |
342 | } | |
343 | ||
eba5102d | 344 | static int __open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 345 | { |
cdd059d7 | 346 | int fd; |
ee4e9625 ACM |
347 | char *root_dir = (char *)""; |
348 | char *name = malloc(PATH_MAX); | |
cdd059d7 | 349 | |
cdd059d7 JO |
350 | if (!name) |
351 | return -ENOMEM; | |
352 | ||
353 | if (machine) | |
354 | root_dir = machine->root_dir; | |
355 | ||
5f70619d | 356 | if (dso__read_binary_type_filename(dso, dso->binary_type, |
ee4e9625 | 357 | root_dir, name, PATH_MAX)) { |
cdd059d7 JO |
358 | free(name); |
359 | return -EINVAL; | |
360 | } | |
361 | ||
a08cae03 | 362 | fd = do_open(name); |
cdd059d7 JO |
363 | free(name); |
364 | return fd; | |
365 | } | |
366 | ||
c6580451 JO |
367 | static void check_data_close(void); |
368 | ||
c1f9aa0a JO |
369 | /** |
370 | * dso_close - Open DSO data file | |
371 | * @dso: dso object | |
372 | * | |
373 | * Open @dso's data file descriptor and updates | |
374 | * list/count of open DSO objects. | |
375 | */ | |
eba5102d JO |
376 | static int open_dso(struct dso *dso, struct machine *machine) |
377 | { | |
378 | int fd = __open_dso(dso, machine); | |
379 | ||
a6f6ae99 | 380 | if (fd >= 0) { |
eba5102d | 381 | dso__list_add(dso); |
c6580451 JO |
382 | /* |
383 | * Check if we crossed the allowed number | |
384 | * of opened DSOs and close one if needed. | |
385 | */ | |
386 | check_data_close(); | |
387 | } | |
eba5102d JO |
388 | |
389 | return fd; | |
390 | } | |
391 | ||
392 | static void close_data_fd(struct dso *dso) | |
53fa8eaa JO |
393 | { |
394 | if (dso->data.fd >= 0) { | |
395 | close(dso->data.fd); | |
396 | dso->data.fd = -1; | |
c3fbd2a6 | 397 | dso->data.file_size = 0; |
eba5102d | 398 | dso__list_del(dso); |
53fa8eaa JO |
399 | } |
400 | } | |
401 | ||
c1f9aa0a JO |
402 | /** |
403 | * dso_close - Close DSO data file | |
404 | * @dso: dso object | |
405 | * | |
406 | * Close @dso's data file descriptor and updates | |
407 | * list/count of open DSO objects. | |
408 | */ | |
eba5102d JO |
409 | static void close_dso(struct dso *dso) |
410 | { | |
411 | close_data_fd(dso); | |
412 | } | |
413 | ||
c6580451 JO |
414 | static void close_first_dso(void) |
415 | { | |
416 | struct dso *dso; | |
417 | ||
418 | dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); | |
419 | close_dso(dso); | |
420 | } | |
421 | ||
422 | static rlim_t get_fd_limit(void) | |
423 | { | |
424 | struct rlimit l; | |
425 | rlim_t limit = 0; | |
426 | ||
427 | /* Allow half of the current open fd limit. */ | |
428 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
429 | if (l.rlim_cur == RLIM_INFINITY) | |
430 | limit = l.rlim_cur; | |
431 | else | |
432 | limit = l.rlim_cur / 2; | |
433 | } else { | |
434 | pr_err("failed to get fd limit\n"); | |
435 | limit = 1; | |
436 | } | |
437 | ||
438 | return limit; | |
439 | } | |
440 | ||
441 | static bool may_cache_fd(void) | |
442 | { | |
443 | static rlim_t limit; | |
444 | ||
445 | if (!limit) | |
446 | limit = get_fd_limit(); | |
447 | ||
448 | if (limit == RLIM_INFINITY) | |
449 | return true; | |
450 | ||
451 | return limit > (rlim_t) dso__data_open_cnt; | |
452 | } | |
453 | ||
c1f9aa0a JO |
454 | /* |
455 | * Check and close LRU dso if we crossed allowed limit | |
456 | * for opened dso file descriptors. The limit is half | |
457 | * of the RLIMIT_NOFILE files opened. | |
458 | */ | |
c6580451 JO |
459 | static void check_data_close(void) |
460 | { | |
461 | bool cache_fd = may_cache_fd(); | |
462 | ||
463 | if (!cache_fd) | |
464 | close_first_dso(); | |
465 | } | |
466 | ||
c1f9aa0a JO |
467 | /** |
468 | * dso__data_close - Close DSO data file | |
469 | * @dso: dso object | |
470 | * | |
471 | * External interface to close @dso's data file descriptor. | |
472 | */ | |
eba5102d JO |
473 | void dso__data_close(struct dso *dso) |
474 | { | |
33bdedce | 475 | pthread_mutex_lock(&dso__data_open_lock); |
eba5102d | 476 | close_dso(dso); |
33bdedce | 477 | pthread_mutex_unlock(&dso__data_open_lock); |
eba5102d JO |
478 | } |
479 | ||
71ff824a | 480 | static void try_to_open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 481 | { |
631d34b5 | 482 | enum dso_binary_type binary_type_data[] = { |
cdd059d7 JO |
483 | DSO_BINARY_TYPE__BUILD_ID_CACHE, |
484 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
485 | DSO_BINARY_TYPE__NOT_FOUND, | |
486 | }; | |
487 | int i = 0; | |
488 | ||
53fa8eaa | 489 | if (dso->data.fd >= 0) |
71ff824a | 490 | return; |
53fa8eaa JO |
491 | |
492 | if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { | |
493 | dso->data.fd = open_dso(dso, machine); | |
c27697d6 | 494 | goto out; |
53fa8eaa | 495 | } |
cdd059d7 JO |
496 | |
497 | do { | |
5f70619d | 498 | dso->binary_type = binary_type_data[i++]; |
cdd059d7 | 499 | |
c27697d6 AH |
500 | dso->data.fd = open_dso(dso, machine); |
501 | if (dso->data.fd >= 0) | |
502 | goto out; | |
cdd059d7 | 503 | |
5f70619d | 504 | } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); |
c27697d6 AH |
505 | out: |
506 | if (dso->data.fd >= 0) | |
507 | dso->data.status = DSO_DATA_STATUS_OK; | |
508 | else | |
509 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
71ff824a NK |
510 | } |
511 | ||
512 | /** | |
4bb11d01 | 513 | * dso__data_get_fd - Get dso's data file descriptor |
71ff824a NK |
514 | * @dso: dso object |
515 | * @machine: machine object | |
516 | * | |
517 | * External interface to find dso's file, open it and | |
4bb11d01 NK |
518 | * returns file descriptor. It should be paired with |
519 | * dso__data_put_fd() if it returns non-negative value. | |
71ff824a | 520 | */ |
4bb11d01 | 521 | int dso__data_get_fd(struct dso *dso, struct machine *machine) |
71ff824a NK |
522 | { |
523 | if (dso->data.status == DSO_DATA_STATUS_ERROR) | |
524 | return -1; | |
cdd059d7 | 525 | |
4bb11d01 NK |
526 | if (pthread_mutex_lock(&dso__data_open_lock) < 0) |
527 | return -1; | |
528 | ||
71ff824a | 529 | try_to_open_dso(dso, machine); |
4bb11d01 NK |
530 | |
531 | if (dso->data.fd < 0) | |
532 | pthread_mutex_unlock(&dso__data_open_lock); | |
71ff824a | 533 | |
c27697d6 | 534 | return dso->data.fd; |
cdd059d7 JO |
535 | } |
536 | ||
4bb11d01 NK |
537 | void dso__data_put_fd(struct dso *dso __maybe_unused) |
538 | { | |
539 | pthread_mutex_unlock(&dso__data_open_lock); | |
540 | } | |
541 | ||
288be943 AH |
542 | bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) |
543 | { | |
544 | u32 flag = 1 << by; | |
545 | ||
546 | if (dso->data.status_seen & flag) | |
547 | return true; | |
548 | ||
549 | dso->data.status_seen |= flag; | |
550 | ||
551 | return false; | |
552 | } | |
553 | ||
cdd059d7 | 554 | static void |
8e67b725 | 555 | dso_cache__free(struct dso *dso) |
cdd059d7 | 556 | { |
8e67b725 | 557 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
558 | struct rb_node *next = rb_first(root); |
559 | ||
8e67b725 | 560 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
561 | while (next) { |
562 | struct dso_cache *cache; | |
563 | ||
564 | cache = rb_entry(next, struct dso_cache, rb_node); | |
565 | next = rb_next(&cache->rb_node); | |
566 | rb_erase(&cache->rb_node, root); | |
567 | free(cache); | |
568 | } | |
8e67b725 | 569 | pthread_mutex_unlock(&dso->lock); |
cdd059d7 JO |
570 | } |
571 | ||
8e67b725 | 572 | static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset) |
cdd059d7 | 573 | { |
8e67b725 | 574 | const struct rb_root *root = &dso->data.cache; |
3344996e ACM |
575 | struct rb_node * const *p = &root->rb_node; |
576 | const struct rb_node *parent = NULL; | |
cdd059d7 JO |
577 | struct dso_cache *cache; |
578 | ||
579 | while (*p != NULL) { | |
580 | u64 end; | |
581 | ||
582 | parent = *p; | |
583 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
584 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
585 | ||
586 | if (offset < cache->offset) | |
587 | p = &(*p)->rb_left; | |
588 | else if (offset >= end) | |
589 | p = &(*p)->rb_right; | |
590 | else | |
591 | return cache; | |
592 | } | |
8e67b725 | 593 | |
cdd059d7 JO |
594 | return NULL; |
595 | } | |
596 | ||
8e67b725 NK |
597 | static struct dso_cache * |
598 | dso_cache__insert(struct dso *dso, struct dso_cache *new) | |
cdd059d7 | 599 | { |
8e67b725 | 600 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
601 | struct rb_node **p = &root->rb_node; |
602 | struct rb_node *parent = NULL; | |
603 | struct dso_cache *cache; | |
604 | u64 offset = new->offset; | |
605 | ||
8e67b725 | 606 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
607 | while (*p != NULL) { |
608 | u64 end; | |
609 | ||
610 | parent = *p; | |
611 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
612 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
613 | ||
614 | if (offset < cache->offset) | |
615 | p = &(*p)->rb_left; | |
616 | else if (offset >= end) | |
617 | p = &(*p)->rb_right; | |
8e67b725 NK |
618 | else |
619 | goto out; | |
cdd059d7 JO |
620 | } |
621 | ||
622 | rb_link_node(&new->rb_node, parent, p); | |
623 | rb_insert_color(&new->rb_node, root); | |
8e67b725 NK |
624 | |
625 | cache = NULL; | |
626 | out: | |
627 | pthread_mutex_unlock(&dso->lock); | |
628 | return cache; | |
cdd059d7 JO |
629 | } |
630 | ||
631 | static ssize_t | |
632 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
633 | u8 *data, u64 size) | |
634 | { | |
635 | u64 cache_offset = offset - cache->offset; | |
636 | u64 cache_size = min(cache->size - cache_offset, size); | |
637 | ||
638 | memcpy(data, cache->data + cache_offset, cache_size); | |
639 | return cache_size; | |
640 | } | |
641 | ||
642 | static ssize_t | |
33bdedce NK |
643 | dso_cache__read(struct dso *dso, struct machine *machine, |
644 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
645 | { |
646 | struct dso_cache *cache; | |
8e67b725 | 647 | struct dso_cache *old; |
cdd059d7 | 648 | ssize_t ret; |
cdd059d7 JO |
649 | |
650 | do { | |
651 | u64 cache_offset; | |
652 | ||
cdd059d7 JO |
653 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); |
654 | if (!cache) | |
33bdedce NK |
655 | return -ENOMEM; |
656 | ||
657 | pthread_mutex_lock(&dso__data_open_lock); | |
658 | ||
659 | /* | |
660 | * dso->data.fd might be closed if other thread opened another | |
661 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
662 | */ | |
71ff824a NK |
663 | try_to_open_dso(dso, machine); |
664 | ||
33bdedce | 665 | if (dso->data.fd < 0) { |
71ff824a NK |
666 | ret = -errno; |
667 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
668 | break; | |
33bdedce | 669 | } |
cdd059d7 JO |
670 | |
671 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
cdd059d7 | 672 | |
c52686f9 | 673 | ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset); |
cdd059d7 JO |
674 | if (ret <= 0) |
675 | break; | |
676 | ||
677 | cache->offset = cache_offset; | |
678 | cache->size = ret; | |
33bdedce NK |
679 | } while (0); |
680 | ||
681 | pthread_mutex_unlock(&dso__data_open_lock); | |
682 | ||
683 | if (ret > 0) { | |
8e67b725 NK |
684 | old = dso_cache__insert(dso, cache); |
685 | if (old) { | |
686 | /* we lose the race */ | |
687 | free(cache); | |
688 | cache = old; | |
689 | } | |
cdd059d7 JO |
690 | |
691 | ret = dso_cache__memcpy(cache, offset, data, size); | |
33bdedce | 692 | } |
cdd059d7 JO |
693 | |
694 | if (ret <= 0) | |
695 | free(cache); | |
696 | ||
cdd059d7 JO |
697 | return ret; |
698 | } | |
699 | ||
33bdedce NK |
700 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, |
701 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
702 | { |
703 | struct dso_cache *cache; | |
704 | ||
8e67b725 | 705 | cache = dso_cache__find(dso, offset); |
cdd059d7 JO |
706 | if (cache) |
707 | return dso_cache__memcpy(cache, offset, data, size); | |
708 | else | |
33bdedce | 709 | return dso_cache__read(dso, machine, offset, data, size); |
cdd059d7 JO |
710 | } |
711 | ||
c1f9aa0a JO |
712 | /* |
713 | * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks | |
714 | * in the rb_tree. Any read to already cached data is served | |
715 | * by cached data. | |
716 | */ | |
33bdedce NK |
717 | static ssize_t cached_read(struct dso *dso, struct machine *machine, |
718 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
719 | { |
720 | ssize_t r = 0; | |
721 | u8 *p = data; | |
722 | ||
723 | do { | |
724 | ssize_t ret; | |
725 | ||
33bdedce | 726 | ret = dso_cache_read(dso, machine, offset, p, size); |
cdd059d7 JO |
727 | if (ret < 0) |
728 | return ret; | |
729 | ||
730 | /* Reached EOF, return what we have. */ | |
731 | if (!ret) | |
732 | break; | |
733 | ||
734 | BUG_ON(ret > size); | |
735 | ||
736 | r += ret; | |
737 | p += ret; | |
738 | offset += ret; | |
739 | size -= ret; | |
740 | ||
741 | } while (size); | |
742 | ||
743 | return r; | |
744 | } | |
745 | ||
33bdedce | 746 | static int data_file_size(struct dso *dso, struct machine *machine) |
c3fbd2a6 | 747 | { |
33bdedce | 748 | int ret = 0; |
c3fbd2a6 | 749 | struct stat st; |
6e81c74c | 750 | char sbuf[STRERR_BUFSIZE]; |
c3fbd2a6 | 751 | |
33bdedce NK |
752 | if (dso->data.file_size) |
753 | return 0; | |
754 | ||
71ff824a NK |
755 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
756 | return -1; | |
757 | ||
33bdedce NK |
758 | pthread_mutex_lock(&dso__data_open_lock); |
759 | ||
760 | /* | |
761 | * dso->data.fd might be closed if other thread opened another | |
762 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
763 | */ | |
71ff824a NK |
764 | try_to_open_dso(dso, machine); |
765 | ||
33bdedce | 766 | if (dso->data.fd < 0) { |
71ff824a NK |
767 | ret = -errno; |
768 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
769 | goto out; | |
c3fbd2a6 JO |
770 | } |
771 | ||
33bdedce NK |
772 | if (fstat(dso->data.fd, &st) < 0) { |
773 | ret = -errno; | |
774 | pr_err("dso cache fstat failed: %s\n", | |
775 | strerror_r(errno, sbuf, sizeof(sbuf))); | |
776 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
777 | goto out; | |
778 | } | |
779 | dso->data.file_size = st.st_size; | |
780 | ||
781 | out: | |
782 | pthread_mutex_unlock(&dso__data_open_lock); | |
783 | return ret; | |
c3fbd2a6 JO |
784 | } |
785 | ||
6d363459 AH |
786 | /** |
787 | * dso__data_size - Return dso data size | |
788 | * @dso: dso object | |
789 | * @machine: machine object | |
790 | * | |
791 | * Return: dso data size | |
792 | */ | |
793 | off_t dso__data_size(struct dso *dso, struct machine *machine) | |
794 | { | |
33bdedce | 795 | if (data_file_size(dso, machine)) |
6d363459 AH |
796 | return -1; |
797 | ||
798 | /* For now just estimate dso data size is close to file size */ | |
799 | return dso->data.file_size; | |
800 | } | |
801 | ||
33bdedce NK |
802 | static ssize_t data_read_offset(struct dso *dso, struct machine *machine, |
803 | u64 offset, u8 *data, ssize_t size) | |
c3fbd2a6 | 804 | { |
33bdedce | 805 | if (data_file_size(dso, machine)) |
c3fbd2a6 JO |
806 | return -1; |
807 | ||
808 | /* Check the offset sanity. */ | |
809 | if (offset > dso->data.file_size) | |
810 | return -1; | |
811 | ||
812 | if (offset + size < offset) | |
813 | return -1; | |
814 | ||
33bdedce | 815 | return cached_read(dso, machine, offset, data, size); |
c3fbd2a6 JO |
816 | } |
817 | ||
c1f9aa0a JO |
818 | /** |
819 | * dso__data_read_offset - Read data from dso file offset | |
820 | * @dso: dso object | |
821 | * @machine: machine object | |
822 | * @offset: file offset | |
823 | * @data: buffer to store data | |
824 | * @size: size of the @data buffer | |
825 | * | |
826 | * External interface to read data from dso file offset. Open | |
827 | * dso data file and use cached_read to get the data. | |
828 | */ | |
c3fbd2a6 JO |
829 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, |
830 | u64 offset, u8 *data, ssize_t size) | |
831 | { | |
33bdedce | 832 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
c3fbd2a6 JO |
833 | return -1; |
834 | ||
33bdedce | 835 | return data_read_offset(dso, machine, offset, data, size); |
c3fbd2a6 JO |
836 | } |
837 | ||
c1f9aa0a JO |
838 | /** |
839 | * dso__data_read_addr - Read data from dso address | |
840 | * @dso: dso object | |
841 | * @machine: machine object | |
842 | * @add: virtual memory address | |
843 | * @data: buffer to store data | |
844 | * @size: size of the @data buffer | |
845 | * | |
846 | * External interface to read data from dso address. | |
847 | */ | |
cdd059d7 JO |
848 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, |
849 | struct machine *machine, u64 addr, | |
850 | u8 *data, ssize_t size) | |
851 | { | |
852 | u64 offset = map->map_ip(map, addr); | |
853 | return dso__data_read_offset(dso, machine, offset, data, size); | |
854 | } | |
855 | ||
856 | struct map *dso__new_map(const char *name) | |
857 | { | |
858 | struct map *map = NULL; | |
859 | struct dso *dso = dso__new(name); | |
860 | ||
861 | if (dso) | |
862 | map = map__new2(0, dso, MAP__FUNCTION); | |
863 | ||
864 | return map; | |
865 | } | |
866 | ||
459ce518 ACM |
867 | struct dso *machine__findnew_kernel(struct machine *machine, const char *name, |
868 | const char *short_name, int dso_type) | |
cdd059d7 JO |
869 | { |
870 | /* | |
871 | * The kernel dso could be created by build_id processing. | |
872 | */ | |
aa7cc2ae | 873 | struct dso *dso = machine__findnew_dso(machine, name); |
cdd059d7 JO |
874 | |
875 | /* | |
876 | * We need to run this in all cases, since during the build_id | |
877 | * processing we had no idea this was the kernel dso. | |
878 | */ | |
879 | if (dso != NULL) { | |
58a98c9c | 880 | dso__set_short_name(dso, short_name, false); |
cdd059d7 JO |
881 | dso->kernel = dso_type; |
882 | } | |
883 | ||
884 | return dso; | |
885 | } | |
886 | ||
4598a0a6 WL |
887 | /* |
888 | * Find a matching entry and/or link current entry to RB tree. | |
889 | * Either one of the dso or name parameter must be non-NULL or the | |
890 | * function will not work. | |
891 | */ | |
e8807844 ACM |
892 | static struct dso *__dso__findlink_by_longname(struct rb_root *root, |
893 | struct dso *dso, const char *name) | |
4598a0a6 WL |
894 | { |
895 | struct rb_node **p = &root->rb_node; | |
896 | struct rb_node *parent = NULL; | |
897 | ||
898 | if (!name) | |
899 | name = dso->long_name; | |
900 | /* | |
901 | * Find node with the matching name | |
902 | */ | |
903 | while (*p) { | |
904 | struct dso *this = rb_entry(*p, struct dso, rb_node); | |
905 | int rc = strcmp(name, this->long_name); | |
906 | ||
907 | parent = *p; | |
908 | if (rc == 0) { | |
909 | /* | |
910 | * In case the new DSO is a duplicate of an existing | |
911 | * one, print an one-time warning & put the new entry | |
912 | * at the end of the list of duplicates. | |
913 | */ | |
914 | if (!dso || (dso == this)) | |
915 | return this; /* Find matching dso */ | |
916 | /* | |
917 | * The core kernel DSOs may have duplicated long name. | |
918 | * In this case, the short name should be different. | |
919 | * Comparing the short names to differentiate the DSOs. | |
920 | */ | |
921 | rc = strcmp(dso->short_name, this->short_name); | |
922 | if (rc == 0) { | |
923 | pr_err("Duplicated dso name: %s\n", name); | |
924 | return NULL; | |
925 | } | |
926 | } | |
927 | if (rc < 0) | |
928 | p = &parent->rb_left; | |
929 | else | |
930 | p = &parent->rb_right; | |
931 | } | |
932 | if (dso) { | |
933 | /* Add new node and rebalance tree */ | |
934 | rb_link_node(&dso->rb_node, parent, p); | |
935 | rb_insert_color(&dso->rb_node, root); | |
e266a753 | 936 | dso->root = root; |
4598a0a6 WL |
937 | } |
938 | return NULL; | |
939 | } | |
940 | ||
e8807844 ACM |
941 | static inline struct dso *__dso__find_by_longname(struct rb_root *root, |
942 | const char *name) | |
4598a0a6 | 943 | { |
e8807844 | 944 | return __dso__findlink_by_longname(root, NULL, name); |
4598a0a6 WL |
945 | } |
946 | ||
bf4414ae | 947 | void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 | 948 | { |
e266a753 AH |
949 | struct rb_root *root = dso->root; |
950 | ||
cdd059d7 JO |
951 | if (name == NULL) |
952 | return; | |
7e155d4d ACM |
953 | |
954 | if (dso->long_name_allocated) | |
bf4414ae | 955 | free((char *)dso->long_name); |
7e155d4d | 956 | |
e266a753 AH |
957 | if (root) { |
958 | rb_erase(&dso->rb_node, root); | |
959 | /* | |
960 | * __dso__findlink_by_longname() isn't guaranteed to add it | |
961 | * back, so a clean removal is required here. | |
962 | */ | |
963 | RB_CLEAR_NODE(&dso->rb_node); | |
964 | dso->root = NULL; | |
965 | } | |
966 | ||
7e155d4d ACM |
967 | dso->long_name = name; |
968 | dso->long_name_len = strlen(name); | |
969 | dso->long_name_allocated = name_allocated; | |
e266a753 AH |
970 | |
971 | if (root) | |
972 | __dso__findlink_by_longname(root, dso, NULL); | |
cdd059d7 JO |
973 | } |
974 | ||
58a98c9c | 975 | void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
976 | { |
977 | if (name == NULL) | |
978 | return; | |
58a98c9c AH |
979 | |
980 | if (dso->short_name_allocated) | |
981 | free((char *)dso->short_name); | |
982 | ||
983 | dso->short_name = name; | |
984 | dso->short_name_len = strlen(name); | |
985 | dso->short_name_allocated = name_allocated; | |
cdd059d7 JO |
986 | } |
987 | ||
988 | static void dso__set_basename(struct dso *dso) | |
989 | { | |
ac5e7f84 SE |
990 | /* |
991 | * basename() may modify path buffer, so we must pass | |
992 | * a copy. | |
993 | */ | |
994 | char *base, *lname = strdup(dso->long_name); | |
995 | ||
996 | if (!lname) | |
997 | return; | |
998 | ||
999 | /* | |
1000 | * basename() may return a pointer to internal | |
1001 | * storage which is reused in subsequent calls | |
1002 | * so copy the result. | |
1003 | */ | |
1004 | base = strdup(basename(lname)); | |
1005 | ||
1006 | free(lname); | |
1007 | ||
1008 | if (!base) | |
1009 | return; | |
1010 | ||
1011 | dso__set_short_name(dso, base, true); | |
cdd059d7 JO |
1012 | } |
1013 | ||
1014 | int dso__name_len(const struct dso *dso) | |
1015 | { | |
1016 | if (!dso) | |
1017 | return strlen("[unknown]"); | |
1018 | if (verbose) | |
1019 | return dso->long_name_len; | |
1020 | ||
1021 | return dso->short_name_len; | |
1022 | } | |
1023 | ||
1024 | bool dso__loaded(const struct dso *dso, enum map_type type) | |
1025 | { | |
1026 | return dso->loaded & (1 << type); | |
1027 | } | |
1028 | ||
1029 | bool dso__sorted_by_name(const struct dso *dso, enum map_type type) | |
1030 | { | |
1031 | return dso->sorted_by_name & (1 << type); | |
1032 | } | |
1033 | ||
1034 | void dso__set_sorted_by_name(struct dso *dso, enum map_type type) | |
1035 | { | |
1036 | dso->sorted_by_name |= (1 << type); | |
1037 | } | |
1038 | ||
1039 | struct dso *dso__new(const char *name) | |
1040 | { | |
1041 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
1042 | ||
1043 | if (dso != NULL) { | |
1044 | int i; | |
1045 | strcpy(dso->name, name); | |
7e155d4d | 1046 | dso__set_long_name(dso, dso->name, false); |
58a98c9c | 1047 | dso__set_short_name(dso, dso->name, false); |
cdd059d7 JO |
1048 | for (i = 0; i < MAP__NR_TYPES; ++i) |
1049 | dso->symbols[i] = dso->symbol_names[i] = RB_ROOT; | |
ca40e2af | 1050 | dso->data.cache = RB_ROOT; |
53fa8eaa | 1051 | dso->data.fd = -1; |
c27697d6 | 1052 | dso->data.status = DSO_DATA_STATUS_UNKNOWN; |
cdd059d7 | 1053 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
5f70619d | 1054 | dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; |
c6d8f2a4 | 1055 | dso->is_64_bit = (sizeof(void *) == 8); |
cdd059d7 | 1056 | dso->loaded = 0; |
0131c4ec | 1057 | dso->rel = 0; |
cdd059d7 JO |
1058 | dso->sorted_by_name = 0; |
1059 | dso->has_build_id = 0; | |
2cc9d0ef | 1060 | dso->has_srcline = 1; |
906049c8 | 1061 | dso->a2l_fails = 1; |
cdd059d7 JO |
1062 | dso->kernel = DSO_TYPE_USER; |
1063 | dso->needs_swap = DSO_SWAP__UNSET; | |
4598a0a6 | 1064 | RB_CLEAR_NODE(&dso->rb_node); |
e266a753 | 1065 | dso->root = NULL; |
cdd059d7 | 1066 | INIT_LIST_HEAD(&dso->node); |
eba5102d | 1067 | INIT_LIST_HEAD(&dso->data.open_entry); |
4a936edc | 1068 | pthread_mutex_init(&dso->lock, NULL); |
d3a7c489 | 1069 | atomic_set(&dso->refcnt, 1); |
cdd059d7 JO |
1070 | } |
1071 | ||
1072 | return dso; | |
1073 | } | |
1074 | ||
1075 | void dso__delete(struct dso *dso) | |
1076 | { | |
1077 | int i; | |
4598a0a6 WL |
1078 | |
1079 | if (!RB_EMPTY_NODE(&dso->rb_node)) | |
1080 | pr_err("DSO %s is still in rbtree when being deleted!\n", | |
1081 | dso->long_name); | |
cdd059d7 JO |
1082 | for (i = 0; i < MAP__NR_TYPES; ++i) |
1083 | symbols__delete(&dso->symbols[i]); | |
ee021d42 ACM |
1084 | |
1085 | if (dso->short_name_allocated) { | |
04662523 | 1086 | zfree((char **)&dso->short_name); |
ee021d42 ACM |
1087 | dso->short_name_allocated = false; |
1088 | } | |
1089 | ||
1090 | if (dso->long_name_allocated) { | |
04662523 | 1091 | zfree((char **)&dso->long_name); |
ee021d42 ACM |
1092 | dso->long_name_allocated = false; |
1093 | } | |
1094 | ||
53fa8eaa | 1095 | dso__data_close(dso); |
cfe9174f | 1096 | auxtrace_cache__free(dso->auxtrace_cache); |
8e67b725 | 1097 | dso_cache__free(dso); |
454ff00f | 1098 | dso__free_a2l(dso); |
04662523 | 1099 | zfree(&dso->symsrc_filename); |
4a936edc | 1100 | pthread_mutex_destroy(&dso->lock); |
cdd059d7 JO |
1101 | free(dso); |
1102 | } | |
1103 | ||
d3a7c489 ACM |
1104 | struct dso *dso__get(struct dso *dso) |
1105 | { | |
1106 | if (dso) | |
1107 | atomic_inc(&dso->refcnt); | |
1108 | return dso; | |
1109 | } | |
1110 | ||
1111 | void dso__put(struct dso *dso) | |
1112 | { | |
1113 | if (dso && atomic_dec_and_test(&dso->refcnt)) | |
1114 | dso__delete(dso); | |
1115 | } | |
1116 | ||
cdd059d7 JO |
1117 | void dso__set_build_id(struct dso *dso, void *build_id) |
1118 | { | |
1119 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
1120 | dso->has_build_id = 1; | |
1121 | } | |
1122 | ||
1123 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
1124 | { | |
1125 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
1126 | } | |
1127 | ||
1128 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
1129 | { | |
1130 | char path[PATH_MAX]; | |
1131 | ||
1132 | if (machine__is_default_guest(machine)) | |
1133 | return; | |
1134 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
1135 | if (sysfs__read_build_id(path, dso->build_id, | |
1136 | sizeof(dso->build_id)) == 0) | |
1137 | dso->has_build_id = true; | |
1138 | } | |
1139 | ||
1140 | int dso__kernel_module_get_build_id(struct dso *dso, | |
1141 | const char *root_dir) | |
1142 | { | |
1143 | char filename[PATH_MAX]; | |
1144 | /* | |
1145 | * kernel module short names are of the form "[module]" and | |
1146 | * we need just "module" here. | |
1147 | */ | |
1148 | const char *name = dso->short_name + 1; | |
1149 | ||
1150 | snprintf(filename, sizeof(filename), | |
1151 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
1152 | root_dir, (int)strlen(name) - 1, name); | |
1153 | ||
1154 | if (sysfs__read_build_id(filename, dso->build_id, | |
1155 | sizeof(dso->build_id)) == 0) | |
1156 | dso->has_build_id = true; | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
1162 | { | |
1163 | bool have_build_id = false; | |
1164 | struct dso *pos; | |
1165 | ||
1166 | list_for_each_entry(pos, head, node) { | |
1167 | if (with_hits && !pos->hit) | |
1168 | continue; | |
1169 | if (pos->has_build_id) { | |
1170 | have_build_id = true; | |
1171 | continue; | |
1172 | } | |
1173 | if (filename__read_build_id(pos->long_name, pos->build_id, | |
1174 | sizeof(pos->build_id)) > 0) { | |
1175 | have_build_id = true; | |
1176 | pos->has_build_id = true; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | return have_build_id; | |
1181 | } | |
1182 | ||
e8807844 | 1183 | void __dsos__add(struct dsos *dsos, struct dso *dso) |
cdd059d7 | 1184 | { |
8fa7d87f | 1185 | list_add_tail(&dso->node, &dsos->head); |
e8807844 | 1186 | __dso__findlink_by_longname(&dsos->root, dso, NULL); |
d3a7c489 ACM |
1187 | /* |
1188 | * It is now in the linked list, grab a reference, then garbage collect | |
1189 | * this when needing memory, by looking at LRU dso instances in the | |
1190 | * list with atomic_read(&dso->refcnt) == 1, i.e. no references | |
1191 | * anywhere besides the one for the list, do, under a lock for the | |
1192 | * list: remove it from the list, then a dso__put(), that probably will | |
1193 | * be the last and will then call dso__delete(), end of life. | |
1194 | * | |
1195 | * That, or at the end of the 'struct machine' lifetime, when all | |
1196 | * 'struct dso' instances will be removed from the list, in | |
1197 | * dsos__exit(), if they have no other reference from some other data | |
1198 | * structure. | |
1199 | * | |
1200 | * E.g.: after processing a 'perf.data' file and storing references | |
1201 | * to objects instantiated while processing events, we will have | |
1202 | * references to the 'thread', 'map', 'dso' structs all from 'struct | |
1203 | * hist_entry' instances, but we may not need anything not referenced, | |
1204 | * so we might as well call machines__exit()/machines__delete() and | |
1205 | * garbage collect it. | |
1206 | */ | |
1207 | dso__get(dso); | |
e8807844 ACM |
1208 | } |
1209 | ||
1210 | void dsos__add(struct dsos *dsos, struct dso *dso) | |
1211 | { | |
1212 | pthread_rwlock_wrlock(&dsos->lock); | |
1213 | __dsos__add(dsos, dso); | |
1214 | pthread_rwlock_unlock(&dsos->lock); | |
cdd059d7 JO |
1215 | } |
1216 | ||
e8807844 | 1217 | struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
cdd059d7 JO |
1218 | { |
1219 | struct dso *pos; | |
1220 | ||
f9ceffb6 | 1221 | if (cmp_short) { |
8fa7d87f | 1222 | list_for_each_entry(pos, &dsos->head, node) |
f9ceffb6 WL |
1223 | if (strcmp(pos->short_name, name) == 0) |
1224 | return pos; | |
1225 | return NULL; | |
1226 | } | |
e8807844 | 1227 | return __dso__find_by_longname(&dsos->root, name); |
cdd059d7 JO |
1228 | } |
1229 | ||
e8807844 ACM |
1230 | struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
1231 | { | |
1232 | struct dso *dso; | |
1233 | pthread_rwlock_rdlock(&dsos->lock); | |
1234 | dso = __dsos__find(dsos, name, cmp_short); | |
1235 | pthread_rwlock_unlock(&dsos->lock); | |
1236 | return dso; | |
1237 | } | |
1238 | ||
1239 | struct dso *__dsos__addnew(struct dsos *dsos, const char *name) | |
cdd059d7 | 1240 | { |
701d8d7f | 1241 | struct dso *dso = dso__new(name); |
cdd059d7 | 1242 | |
701d8d7f | 1243 | if (dso != NULL) { |
e8807844 | 1244 | __dsos__add(dsos, dso); |
701d8d7f | 1245 | dso__set_basename(dso); |
82de26ab MH |
1246 | /* Put dso here because __dsos_add already got it */ |
1247 | dso__put(dso); | |
cdd059d7 | 1248 | } |
cdd059d7 JO |
1249 | return dso; |
1250 | } | |
1251 | ||
701d8d7f JO |
1252 | struct dso *__dsos__findnew(struct dsos *dsos, const char *name) |
1253 | { | |
e8807844 ACM |
1254 | struct dso *dso = __dsos__find(dsos, name, false); |
1255 | ||
1256 | return dso ? dso : __dsos__addnew(dsos, name); | |
1257 | } | |
701d8d7f | 1258 | |
e8807844 ACM |
1259 | struct dso *dsos__findnew(struct dsos *dsos, const char *name) |
1260 | { | |
1261 | struct dso *dso; | |
1262 | pthread_rwlock_wrlock(&dsos->lock); | |
d3a7c489 | 1263 | dso = dso__get(__dsos__findnew(dsos, name)); |
e8807844 ACM |
1264 | pthread_rwlock_unlock(&dsos->lock); |
1265 | return dso; | |
701d8d7f JO |
1266 | } |
1267 | ||
cdd059d7 | 1268 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
417c2ff6 | 1269 | bool (skip)(struct dso *dso, int parm), int parm) |
cdd059d7 JO |
1270 | { |
1271 | struct dso *pos; | |
1272 | size_t ret = 0; | |
1273 | ||
1274 | list_for_each_entry(pos, head, node) { | |
417c2ff6 | 1275 | if (skip && skip(pos, parm)) |
cdd059d7 JO |
1276 | continue; |
1277 | ret += dso__fprintf_buildid(pos, fp); | |
1278 | ret += fprintf(fp, " %s\n", pos->long_name); | |
1279 | } | |
1280 | return ret; | |
1281 | } | |
1282 | ||
1283 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
1284 | { | |
1285 | struct dso *pos; | |
1286 | size_t ret = 0; | |
1287 | ||
1288 | list_for_each_entry(pos, head, node) { | |
1289 | int i; | |
1290 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
1291 | ret += dso__fprintf(pos, i, fp); | |
1292 | } | |
1293 | ||
1294 | return ret; | |
1295 | } | |
1296 | ||
1297 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
1298 | { | |
1299 | char sbuild_id[BUILD_ID_SIZE * 2 + 1]; | |
1300 | ||
1301 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1302 | return fprintf(fp, "%s", sbuild_id); | |
1303 | } | |
1304 | ||
1305 | size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp) | |
1306 | { | |
1307 | struct rb_node *nd; | |
1308 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
1309 | ||
1310 | if (dso->short_name != dso->long_name) | |
1311 | ret += fprintf(fp, "%s, ", dso->long_name); | |
1312 | ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type], | |
919d590f | 1313 | dso__loaded(dso, type) ? "" : "NOT "); |
cdd059d7 JO |
1314 | ret += dso__fprintf_buildid(dso, fp); |
1315 | ret += fprintf(fp, ")\n"); | |
1316 | for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) { | |
1317 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); | |
1318 | ret += symbol__fprintf(pos, fp); | |
1319 | } | |
1320 | ||
1321 | return ret; | |
1322 | } | |
2b5b8bb2 AH |
1323 | |
1324 | enum dso_type dso__type(struct dso *dso, struct machine *machine) | |
1325 | { | |
1326 | int fd; | |
4bb11d01 | 1327 | enum dso_type type = DSO__TYPE_UNKNOWN; |
2b5b8bb2 | 1328 | |
4bb11d01 NK |
1329 | fd = dso__data_get_fd(dso, machine); |
1330 | if (fd >= 0) { | |
1331 | type = dso__type_fd(fd); | |
1332 | dso__data_put_fd(dso); | |
1333 | } | |
2b5b8bb2 | 1334 | |
4bb11d01 | 1335 | return type; |
2b5b8bb2 | 1336 | } |
18425f13 ACM |
1337 | |
1338 | int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) | |
1339 | { | |
1340 | int idx, errnum = dso->load_errno; | |
1341 | /* | |
1342 | * This must have a same ordering as the enum dso_load_errno. | |
1343 | */ | |
1344 | static const char *dso_load__error_str[] = { | |
1345 | "Internal tools/perf/ library error", | |
1346 | "Invalid ELF file", | |
1347 | "Can not read build id", | |
1348 | "Mismatching build id", | |
1349 | "Decompression failure", | |
1350 | }; | |
1351 | ||
1352 | BUG_ON(buflen == 0); | |
1353 | ||
1354 | if (errnum >= 0) { | |
1355 | const char *err = strerror_r(errnum, buf, buflen); | |
1356 | ||
1357 | if (err != buf) | |
1358 | scnprintf(buf, buflen, "%s", err); | |
1359 | ||
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END) | |
1364 | return -1; | |
1365 | ||
1366 | idx = errnum - __DSO_LOAD_ERRNO__START; | |
1367 | scnprintf(buf, buflen, "%s", dso_load__error_str[idx]); | |
1368 | return 0; | |
1369 | } |