1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <asm/bug.h> |
3 | #include <linux/kernel.h> |
4 | #include <linux/string.h> |
5 | #include <linux/zalloc.h> |
6 | #include <sys/time.h> |
7 | #include <sys/resource.h> |
8 | #include <sys/types.h> |
9 | #include <sys/stat.h> |
10 | #include <unistd.h> |
11 | #include <errno.h> |
12 | #include <fcntl.h> |
13 | #include <stdlib.h> |
14 | #ifdef HAVE_LIBBPF_SUPPORT |
15 | #include <bpf/libbpf.h> |
16 | #include "bpf-event.h" |
17 | #include "bpf-utils.h" |
18 | #endif |
19 | #include "compress.h" |
20 | #include "env.h" |
21 | #include "namespaces.h" |
22 | #include "path.h" |
23 | #include "map.h" |
24 | #include "symbol.h" |
25 | #include "srcline.h" |
26 | #include "dso.h" |
27 | #include "dsos.h" |
28 | #include "machine.h" |
29 | #include "auxtrace.h" |
30 | #include "util.h" /* O_CLOEXEC for older systems */ |
31 | #include "debug.h" |
32 | #include "string2.h" |
33 | #include "vdso.h" |
34 | #include "annotate-data.h" |
35 | |
36 | static const char * const debuglink_paths[] = { |
37 | "%.0s%s" , |
38 | "%s/%s" , |
39 | "%s/.debug/%s" , |
40 | "/usr/lib/debug%s/%s" |
41 | }; |
42 | |
43 | char dso__symtab_origin(const struct dso *dso) |
44 | { |
45 | static const char origin[] = { |
46 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
47 | [DSO_BINARY_TYPE__VMLINUX] = 'v', |
48 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', |
49 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', |
50 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', |
51 | [DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO] = 'D', |
52 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', |
53 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', |
54 | [DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO] = 'x', |
55 | [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', |
56 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', |
57 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', |
58 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', |
59 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm', |
60 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', |
61 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', |
62 | [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', |
63 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', |
64 | }; |
65 | |
66 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) |
67 | return '!'; |
68 | return origin[dso->symtab_type]; |
69 | } |
70 | |
71 | bool dso__is_object_file(const struct dso *dso) |
72 | { |
73 | switch (dso->binary_type) { |
74 | case DSO_BINARY_TYPE__KALLSYMS: |
75 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
76 | case DSO_BINARY_TYPE__JAVA_JIT: |
77 | case DSO_BINARY_TYPE__BPF_PROG_INFO: |
78 | case DSO_BINARY_TYPE__BPF_IMAGE: |
79 | case DSO_BINARY_TYPE__OOL: |
80 | return false; |
81 | case DSO_BINARY_TYPE__VMLINUX: |
82 | case DSO_BINARY_TYPE__GUEST_VMLINUX: |
83 | case DSO_BINARY_TYPE__DEBUGLINK: |
84 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: |
85 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
86 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: |
87 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: |
88 | case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: |
89 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
90 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
91 | case DSO_BINARY_TYPE__GUEST_KMODULE: |
92 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
93 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
94 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
95 | case DSO_BINARY_TYPE__KCORE: |
96 | case DSO_BINARY_TYPE__GUEST_KCORE: |
97 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
98 | case DSO_BINARY_TYPE__NOT_FOUND: |
99 | default: |
100 | return true; |
101 | } |
102 | } |
103 | |
104 | int dso__read_binary_type_filename(const struct dso *dso, |
105 | enum dso_binary_type type, |
106 | char *root_dir, char *filename, size_t size) |
107 | { |
108 | char build_id_hex[SBUILD_ID_SIZE]; |
109 | int ret = 0; |
110 | size_t len; |
111 | |
112 | switch (type) { |
113 | case DSO_BINARY_TYPE__DEBUGLINK: |
114 | { |
115 | const char *last_slash; |
116 | char dso_dir[PATH_MAX]; |
117 | char symfile[PATH_MAX]; |
118 | unsigned int i; |
119 | |
120 | len = __symbol__join_symfs(bf: filename, size, path: dso->long_name); |
121 | last_slash = filename + len; |
122 | while (last_slash != filename && *last_slash != '/') |
123 | last_slash--; |
124 | |
125 | strncpy(p: dso_dir, q: filename, size: last_slash - filename); |
126 | dso_dir[last_slash-filename] = '\0'; |
127 | |
128 | if (!is_regular_file(file: filename)) { |
129 | ret = -1; |
130 | break; |
131 | } |
132 | |
133 | ret = filename__read_debuglink(filename, debuglink: symfile, PATH_MAX); |
134 | if (ret) |
135 | break; |
136 | |
137 | /* Check predefined locations where debug file might reside */ |
138 | ret = -1; |
139 | for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) { |
140 | snprintf(buf: filename, size, |
141 | fmt: debuglink_paths[i], dso_dir, symfile); |
142 | if (is_regular_file(file: filename)) { |
143 | ret = 0; |
144 | break; |
145 | } |
146 | } |
147 | |
148 | break; |
149 | } |
150 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: |
151 | if (dso__build_id_filename(dso, bf: filename, size, is_debug: false) == NULL) |
152 | ret = -1; |
153 | break; |
154 | |
155 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: |
156 | if (dso__build_id_filename(dso, bf: filename, size, is_debug: true) == NULL) |
157 | ret = -1; |
158 | break; |
159 | |
160 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: |
161 | len = __symbol__join_symfs(bf: filename, size, path: "/usr/lib/debug" ); |
162 | snprintf(buf: filename + len, size: size - len, fmt: "%s.debug" , dso->long_name); |
163 | break; |
164 | |
165 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: |
166 | len = __symbol__join_symfs(bf: filename, size, path: "/usr/lib/debug" ); |
167 | snprintf(buf: filename + len, size: size - len, fmt: "%s" , dso->long_name); |
168 | break; |
169 | |
170 | case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: |
171 | /* |
172 | * Ubuntu can mixup /usr/lib with /lib, putting debuginfo in |
173 | * /usr/lib/debug/lib when it is expected to be in |
174 | * /usr/lib/debug/usr/lib |
175 | */ |
176 | if (strlen(dso->long_name) < 9 || |
177 | strncmp(dso->long_name, "/usr/lib/" , 9)) { |
178 | ret = -1; |
179 | break; |
180 | } |
181 | len = __symbol__join_symfs(bf: filename, size, path: "/usr/lib/debug" ); |
182 | snprintf(buf: filename + len, size: size - len, fmt: "%s" , dso->long_name + 4); |
183 | break; |
184 | |
185 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
186 | { |
187 | const char *last_slash; |
188 | size_t dir_size; |
189 | |
190 | last_slash = dso->long_name + dso->long_name_len; |
191 | while (last_slash != dso->long_name && *last_slash != '/') |
192 | last_slash--; |
193 | |
194 | len = __symbol__join_symfs(bf: filename, size, path: "" ); |
195 | dir_size = last_slash - dso->long_name + 2; |
196 | if (dir_size > (size - len)) { |
197 | ret = -1; |
198 | break; |
199 | } |
200 | len += scnprintf(buf: filename + len, size: dir_size, fmt: "%s" , dso->long_name); |
201 | len += scnprintf(buf: filename + len , size: size - len, fmt: ".debug%s" , |
202 | last_slash); |
203 | break; |
204 | } |
205 | |
206 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
207 | if (!dso->has_build_id) { |
208 | ret = -1; |
209 | break; |
210 | } |
211 | |
212 | build_id__sprintf(build_id: &dso->bid, bf: build_id_hex); |
213 | len = __symbol__join_symfs(bf: filename, size, path: "/usr/lib/debug/.build-id/" ); |
214 | snprintf(buf: filename + len, size: size - len, fmt: "%.2s/%s.debug" , |
215 | build_id_hex, build_id_hex + 2); |
216 | break; |
217 | |
218 | case DSO_BINARY_TYPE__VMLINUX: |
219 | case DSO_BINARY_TYPE__GUEST_VMLINUX: |
220 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
221 | __symbol__join_symfs(bf: filename, size, path: dso->long_name); |
222 | break; |
223 | |
224 | case DSO_BINARY_TYPE__GUEST_KMODULE: |
225 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
226 | path__join3(bf: filename, size, path1: symbol_conf.symfs, |
227 | path2: root_dir, path3: dso->long_name); |
228 | break; |
229 | |
230 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: |
231 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
232 | __symbol__join_symfs(bf: filename, size, path: dso->long_name); |
233 | break; |
234 | |
235 | case DSO_BINARY_TYPE__KCORE: |
236 | case DSO_BINARY_TYPE__GUEST_KCORE: |
237 | snprintf(buf: filename, size, fmt: "%s" , dso->long_name); |
238 | break; |
239 | |
240 | default: |
241 | case DSO_BINARY_TYPE__KALLSYMS: |
242 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
243 | case DSO_BINARY_TYPE__JAVA_JIT: |
244 | case DSO_BINARY_TYPE__BPF_PROG_INFO: |
245 | case DSO_BINARY_TYPE__BPF_IMAGE: |
246 | case DSO_BINARY_TYPE__OOL: |
247 | case DSO_BINARY_TYPE__NOT_FOUND: |
248 | ret = -1; |
249 | break; |
250 | } |
251 | |
252 | return ret; |
253 | } |
254 | |
255 | enum { |
256 | COMP_ID__NONE = 0, |
257 | }; |
258 | |
259 | static const struct { |
260 | const char *fmt; |
261 | int (*decompress)(const char *input, int output); |
262 | bool (*is_compressed)(const char *input); |
263 | } compressions[] = { |
264 | [COMP_ID__NONE] = { .fmt = NULL, }, |
265 | #ifdef HAVE_ZLIB_SUPPORT |
266 | { "gz" , gzip_decompress_to_file, gzip_is_compressed }, |
267 | #endif |
268 | #ifdef HAVE_LZMA_SUPPORT |
269 | { "xz" , lzma_decompress_to_file, lzma_is_compressed }, |
270 | #endif |
271 | { NULL, NULL, NULL }, |
272 | }; |
273 | |
274 | static int is_supported_compression(const char *ext) |
275 | { |
276 | unsigned i; |
277 | |
278 | for (i = 1; compressions[i].fmt; i++) { |
279 | if (!strcmp(ext, compressions[i].fmt)) |
280 | return i; |
281 | } |
282 | return COMP_ID__NONE; |
283 | } |
284 | |
285 | bool is_kernel_module(const char *pathname, int cpumode) |
286 | { |
287 | struct kmod_path m; |
288 | int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK; |
289 | |
290 | WARN_ONCE(mode != cpumode, |
291 | "Internal error: passing unmasked cpumode (%x) to is_kernel_module" , |
292 | cpumode); |
293 | |
294 | switch (mode) { |
295 | case PERF_RECORD_MISC_USER: |
296 | case PERF_RECORD_MISC_HYPERVISOR: |
297 | case PERF_RECORD_MISC_GUEST_USER: |
298 | return false; |
299 | /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */ |
300 | default: |
301 | if (kmod_path__parse(&m, pathname)) { |
302 | pr_err("Failed to check whether %s is a kernel module or not. Assume it is." , |
303 | pathname); |
304 | return true; |
305 | } |
306 | } |
307 | |
308 | return m.kmod; |
309 | } |
310 | |
311 | bool dso__needs_decompress(struct dso *dso) |
312 | { |
313 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || |
314 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; |
315 | } |
316 | |
317 | int filename__decompress(const char *name, char *pathname, |
318 | size_t len, int comp, int *err) |
319 | { |
320 | char tmpbuf[] = KMOD_DECOMP_NAME; |
321 | int fd = -1; |
322 | |
323 | /* |
324 | * We have proper compression id for DSO and yet the file |
325 | * behind the 'name' can still be plain uncompressed object. |
326 | * |
327 | * The reason is behind the logic we open the DSO object files, |
328 | * when we try all possible 'debug' objects until we find the |
329 | * data. So even if the DSO is represented by 'krava.xz' module, |
330 | * we can end up here opening ~/.debug/....23432432/debug' file |
331 | * which is not compressed. |
332 | * |
333 | * To keep this transparent, we detect this and return the file |
334 | * descriptor to the uncompressed file. |
335 | */ |
336 | if (!compressions[comp].is_compressed(name)) |
337 | return open(name, O_RDONLY); |
338 | |
339 | fd = mkstemp(tmpbuf); |
340 | if (fd < 0) { |
341 | *err = errno; |
342 | return -1; |
343 | } |
344 | |
345 | if (compressions[comp].decompress(name, fd)) { |
346 | *err = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE; |
347 | close(fd); |
348 | fd = -1; |
349 | } |
350 | |
351 | if (!pathname || (fd < 0)) |
352 | unlink(tmpbuf); |
353 | |
354 | if (pathname && (fd >= 0)) |
355 | strlcpy(pathname, tmpbuf, len); |
356 | |
357 | return fd; |
358 | } |
359 | |
360 | static int decompress_kmodule(struct dso *dso, const char *name, |
361 | char *pathname, size_t len) |
362 | { |
363 | if (!dso__needs_decompress(dso)) |
364 | return -1; |
365 | |
366 | if (dso->comp == COMP_ID__NONE) |
367 | return -1; |
368 | |
369 | return filename__decompress(name, pathname, len, comp: dso->comp, |
370 | err: &dso->load_errno); |
371 | } |
372 | |
373 | int dso__decompress_kmodule_fd(struct dso *dso, const char *name) |
374 | { |
375 | return decompress_kmodule(dso, name, NULL, len: 0); |
376 | } |
377 | |
378 | int dso__decompress_kmodule_path(struct dso *dso, const char *name, |
379 | char *pathname, size_t len) |
380 | { |
381 | int fd = decompress_kmodule(dso, name, pathname, len); |
382 | |
383 | close(fd); |
384 | return fd >= 0 ? 0 : -1; |
385 | } |
386 | |
387 | /* |
388 | * Parses kernel module specified in @path and updates |
389 | * @m argument like: |
390 | * |
391 | * @comp - true if @path contains supported compression suffix, |
392 | * false otherwise |
393 | * @kmod - true if @path contains '.ko' suffix in right position, |
394 | * false otherwise |
395 | * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name |
396 | * of the kernel module without suffixes, otherwise strudup-ed |
397 | * base name of @path |
398 | * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string |
399 | * the compression suffix |
400 | * |
401 | * Returns 0 if there's no strdup error, -ENOMEM otherwise. |
402 | */ |
403 | int __kmod_path__parse(struct kmod_path *m, const char *path, |
404 | bool alloc_name) |
405 | { |
406 | const char *name = strrchr(path, '/'); |
407 | const char *ext = strrchr(path, '.'); |
408 | bool is_simple_name = false; |
409 | |
410 | memset(m, 0x0, sizeof(*m)); |
411 | name = name ? name + 1 : path; |
412 | |
413 | /* |
414 | * '.' is also a valid character for module name. For example: |
415 | * [aaa.bbb] is a valid module name. '[' should have higher |
416 | * priority than '.ko' suffix. |
417 | * |
418 | * The kernel names are from machine__mmap_name. Such |
419 | * name should belong to kernel itself, not kernel module. |
420 | */ |
421 | if (name[0] == '[') { |
422 | is_simple_name = true; |
423 | if ((strncmp(name, "[kernel.kallsyms]" , 17) == 0) || |
424 | (strncmp(name, "[guest.kernel.kallsyms" , 22) == 0) || |
425 | (strncmp(name, "[vdso]" , 6) == 0) || |
426 | (strncmp(name, "[vdso32]" , 8) == 0) || |
427 | (strncmp(name, "[vdsox32]" , 9) == 0) || |
428 | (strncmp(name, "[vsyscall]" , 10) == 0)) { |
429 | m->kmod = false; |
430 | |
431 | } else |
432 | m->kmod = true; |
433 | } |
434 | |
435 | /* No extension, just return name. */ |
436 | if ((ext == NULL) || is_simple_name) { |
437 | if (alloc_name) { |
438 | m->name = strdup(name); |
439 | return m->name ? 0 : -ENOMEM; |
440 | } |
441 | return 0; |
442 | } |
443 | |
444 | m->comp = is_supported_compression(ext: ext + 1); |
445 | if (m->comp > COMP_ID__NONE) |
446 | ext -= 3; |
447 | |
448 | /* Check .ko extension only if there's enough name left. */ |
449 | if (ext > name) |
450 | m->kmod = !strncmp(ext, ".ko" , 3); |
451 | |
452 | if (alloc_name) { |
453 | if (m->kmod) { |
454 | if (asprintf(&m->name, "[%.*s]" , (int) (ext - name), name) == -1) |
455 | return -ENOMEM; |
456 | } else { |
457 | if (asprintf(&m->name, "%s" , name) == -1) |
458 | return -ENOMEM; |
459 | } |
460 | |
461 | strreplace(str: m->name, old: '-', new: '_'); |
462 | } |
463 | |
464 | return 0; |
465 | } |
466 | |
467 | void dso__set_module_info(struct dso *dso, struct kmod_path *m, |
468 | struct machine *machine) |
469 | { |
470 | if (machine__is_host(machine)) |
471 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; |
472 | else |
473 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; |
474 | |
475 | /* _KMODULE_COMP should be next to _KMODULE */ |
476 | if (m->kmod && m->comp) { |
477 | dso->symtab_type++; |
478 | dso->comp = m->comp; |
479 | } |
480 | |
481 | dso->is_kmod = 1; |
482 | dso__set_short_name(dso, name: strdup(m->name), name_allocated: true); |
483 | } |
484 | |
485 | /* |
486 | * Global list of open DSOs and the counter. |
487 | */ |
488 | static LIST_HEAD(dso__data_open); |
489 | static long dso__data_open_cnt; |
490 | static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER; |
491 | |
492 | static void dso__list_add(struct dso *dso) |
493 | { |
494 | list_add_tail(new: &dso->data.open_entry, head: &dso__data_open); |
495 | dso__data_open_cnt++; |
496 | } |
497 | |
498 | static void dso__list_del(struct dso *dso) |
499 | { |
500 | list_del_init(entry: &dso->data.open_entry); |
501 | WARN_ONCE(dso__data_open_cnt <= 0, |
502 | "DSO data fd counter out of bounds." ); |
503 | dso__data_open_cnt--; |
504 | } |
505 | |
506 | static void close_first_dso(void); |
507 | |
508 | static int do_open(char *name) |
509 | { |
510 | int fd; |
511 | char sbuf[STRERR_BUFSIZE]; |
512 | |
513 | do { |
514 | fd = open(name, O_RDONLY|O_CLOEXEC); |
515 | if (fd >= 0) |
516 | return fd; |
517 | |
518 | pr_debug("dso open failed: %s\n" , |
519 | str_error_r(errno, sbuf, sizeof(sbuf))); |
520 | if (!dso__data_open_cnt || errno != EMFILE) |
521 | break; |
522 | |
523 | close_first_dso(); |
524 | } while (1); |
525 | |
526 | return -1; |
527 | } |
528 | |
529 | char *dso__filename_with_chroot(const struct dso *dso, const char *filename) |
530 | { |
531 | return filename_with_chroot(pid: nsinfo__pid(nsi: dso->nsinfo), filename); |
532 | } |
533 | |
534 | static int __open_dso(struct dso *dso, struct machine *machine) |
535 | { |
536 | int fd = -EINVAL; |
537 | char *root_dir = (char *)"" ; |
538 | char *name = malloc(PATH_MAX); |
539 | bool decomp = false; |
540 | |
541 | if (!name) |
542 | return -ENOMEM; |
543 | |
544 | mutex_lock(&dso->lock); |
545 | if (machine) |
546 | root_dir = machine->root_dir; |
547 | |
548 | if (dso__read_binary_type_filename(dso, type: dso->binary_type, |
549 | root_dir, filename: name, PATH_MAX)) |
550 | goto out; |
551 | |
552 | if (!is_regular_file(file: name)) { |
553 | char *new_name; |
554 | |
555 | if (errno != ENOENT || dso->nsinfo == NULL) |
556 | goto out; |
557 | |
558 | new_name = dso__filename_with_chroot(dso, filename: name); |
559 | if (!new_name) |
560 | goto out; |
561 | |
562 | free(name); |
563 | name = new_name; |
564 | } |
565 | |
566 | if (dso__needs_decompress(dso)) { |
567 | char newpath[KMOD_DECOMP_LEN]; |
568 | size_t len = sizeof(newpath); |
569 | |
570 | if (dso__decompress_kmodule_path(dso, name, pathname: newpath, len) < 0) { |
571 | fd = -dso->load_errno; |
572 | goto out; |
573 | } |
574 | |
575 | decomp = true; |
576 | strcpy(p: name, q: newpath); |
577 | } |
578 | |
579 | fd = do_open(name); |
580 | |
581 | if (decomp) |
582 | unlink(name); |
583 | |
584 | out: |
585 | mutex_unlock(lock: &dso->lock); |
586 | free(name); |
587 | return fd; |
588 | } |
589 | |
590 | static void check_data_close(void); |
591 | |
592 | /** |
593 | * dso_close - Open DSO data file |
594 | * @dso: dso object |
595 | * |
596 | * Open @dso's data file descriptor and updates |
597 | * list/count of open DSO objects. |
598 | */ |
599 | static int open_dso(struct dso *dso, struct machine *machine) |
600 | { |
601 | int fd; |
602 | struct nscookie nsc; |
603 | |
604 | if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) { |
605 | mutex_lock(&dso->lock); |
606 | nsinfo__mountns_enter(nsi: dso->nsinfo, nc: &nsc); |
607 | mutex_unlock(lock: &dso->lock); |
608 | } |
609 | fd = __open_dso(dso, machine); |
610 | if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) |
611 | nsinfo__mountns_exit(nc: &nsc); |
612 | |
613 | if (fd >= 0) { |
614 | dso__list_add(dso); |
615 | /* |
616 | * Check if we crossed the allowed number |
617 | * of opened DSOs and close one if needed. |
618 | */ |
619 | check_data_close(); |
620 | } |
621 | |
622 | return fd; |
623 | } |
624 | |
625 | static void close_data_fd(struct dso *dso) |
626 | { |
627 | if (dso->data.fd >= 0) { |
628 | close(dso->data.fd); |
629 | dso->data.fd = -1; |
630 | dso->data.file_size = 0; |
631 | dso__list_del(dso); |
632 | } |
633 | } |
634 | |
635 | /** |
636 | * dso_close - Close DSO data file |
637 | * @dso: dso object |
638 | * |
639 | * Close @dso's data file descriptor and updates |
640 | * list/count of open DSO objects. |
641 | */ |
642 | static void close_dso(struct dso *dso) |
643 | { |
644 | close_data_fd(dso); |
645 | } |
646 | |
647 | static void close_first_dso(void) |
648 | { |
649 | struct dso *dso; |
650 | |
651 | dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); |
652 | close_dso(dso); |
653 | } |
654 | |
655 | static rlim_t get_fd_limit(void) |
656 | { |
657 | struct rlimit l; |
658 | rlim_t limit = 0; |
659 | |
660 | /* Allow half of the current open fd limit. */ |
661 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { |
662 | if (l.rlim_cur == RLIM_INFINITY) |
663 | limit = l.rlim_cur; |
664 | else |
665 | limit = l.rlim_cur / 2; |
666 | } else { |
667 | pr_err("failed to get fd limit\n" ); |
668 | limit = 1; |
669 | } |
670 | |
671 | return limit; |
672 | } |
673 | |
674 | static rlim_t fd_limit; |
675 | |
676 | /* |
677 | * Used only by tests/dso-data.c to reset the environment |
678 | * for tests. I dont expect we should change this during |
679 | * standard runtime. |
680 | */ |
681 | void reset_fd_limit(void) |
682 | { |
683 | fd_limit = 0; |
684 | } |
685 | |
686 | static bool may_cache_fd(void) |
687 | { |
688 | if (!fd_limit) |
689 | fd_limit = get_fd_limit(); |
690 | |
691 | if (fd_limit == RLIM_INFINITY) |
692 | return true; |
693 | |
694 | return fd_limit > (rlim_t) dso__data_open_cnt; |
695 | } |
696 | |
697 | /* |
698 | * Check and close LRU dso if we crossed allowed limit |
699 | * for opened dso file descriptors. The limit is half |
700 | * of the RLIMIT_NOFILE files opened. |
701 | */ |
702 | static void check_data_close(void) |
703 | { |
704 | bool cache_fd = may_cache_fd(); |
705 | |
706 | if (!cache_fd) |
707 | close_first_dso(); |
708 | } |
709 | |
710 | /** |
711 | * dso__data_close - Close DSO data file |
712 | * @dso: dso object |
713 | * |
714 | * External interface to close @dso's data file descriptor. |
715 | */ |
716 | void dso__data_close(struct dso *dso) |
717 | { |
718 | pthread_mutex_lock(&dso__data_open_lock); |
719 | close_dso(dso); |
720 | pthread_mutex_unlock(&dso__data_open_lock); |
721 | } |
722 | |
723 | static void try_to_open_dso(struct dso *dso, struct machine *machine) |
724 | { |
725 | enum dso_binary_type binary_type_data[] = { |
726 | DSO_BINARY_TYPE__BUILD_ID_CACHE, |
727 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, |
728 | DSO_BINARY_TYPE__NOT_FOUND, |
729 | }; |
730 | int i = 0; |
731 | |
732 | if (dso->data.fd >= 0) |
733 | return; |
734 | |
735 | if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { |
736 | dso->data.fd = open_dso(dso, machine); |
737 | goto out; |
738 | } |
739 | |
740 | do { |
741 | dso->binary_type = binary_type_data[i++]; |
742 | |
743 | dso->data.fd = open_dso(dso, machine); |
744 | if (dso->data.fd >= 0) |
745 | goto out; |
746 | |
747 | } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); |
748 | out: |
749 | if (dso->data.fd >= 0) |
750 | dso->data.status = DSO_DATA_STATUS_OK; |
751 | else |
752 | dso->data.status = DSO_DATA_STATUS_ERROR; |
753 | } |
754 | |
755 | /** |
756 | * dso__data_get_fd - Get dso's data file descriptor |
757 | * @dso: dso object |
758 | * @machine: machine object |
759 | * |
760 | * External interface to find dso's file, open it and |
761 | * returns file descriptor. It should be paired with |
762 | * dso__data_put_fd() if it returns non-negative value. |
763 | */ |
764 | int dso__data_get_fd(struct dso *dso, struct machine *machine) |
765 | { |
766 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
767 | return -1; |
768 | |
769 | if (pthread_mutex_lock(&dso__data_open_lock) < 0) |
770 | return -1; |
771 | |
772 | try_to_open_dso(dso, machine); |
773 | |
774 | if (dso->data.fd < 0) |
775 | pthread_mutex_unlock(&dso__data_open_lock); |
776 | |
777 | return dso->data.fd; |
778 | } |
779 | |
780 | void dso__data_put_fd(struct dso *dso __maybe_unused) |
781 | { |
782 | pthread_mutex_unlock(&dso__data_open_lock); |
783 | } |
784 | |
785 | bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) |
786 | { |
787 | u32 flag = 1 << by; |
788 | |
789 | if (dso->data.status_seen & flag) |
790 | return true; |
791 | |
792 | dso->data.status_seen |= flag; |
793 | |
794 | return false; |
795 | } |
796 | |
797 | #ifdef HAVE_LIBBPF_SUPPORT |
798 | static ssize_t bpf_read(struct dso *dso, u64 offset, char *data) |
799 | { |
800 | struct bpf_prog_info_node *node; |
801 | ssize_t size = DSO__DATA_CACHE_SIZE; |
802 | u64 len; |
803 | u8 *buf; |
804 | |
805 | node = perf_env__find_bpf_prog_info(dso->bpf_prog.env, dso->bpf_prog.id); |
806 | if (!node || !node->info_linear) { |
807 | dso->data.status = DSO_DATA_STATUS_ERROR; |
808 | return -1; |
809 | } |
810 | |
811 | len = node->info_linear->info.jited_prog_len; |
812 | buf = (u8 *)(uintptr_t)node->info_linear->info.jited_prog_insns; |
813 | |
814 | if (offset >= len) |
815 | return -1; |
816 | |
817 | size = (ssize_t)min(len - offset, (u64)size); |
818 | memcpy(data, buf + offset, size); |
819 | return size; |
820 | } |
821 | |
822 | static int bpf_size(struct dso *dso) |
823 | { |
824 | struct bpf_prog_info_node *node; |
825 | |
826 | node = perf_env__find_bpf_prog_info(dso->bpf_prog.env, dso->bpf_prog.id); |
827 | if (!node || !node->info_linear) { |
828 | dso->data.status = DSO_DATA_STATUS_ERROR; |
829 | return -1; |
830 | } |
831 | |
832 | dso->data.file_size = node->info_linear->info.jited_prog_len; |
833 | return 0; |
834 | } |
835 | #endif // HAVE_LIBBPF_SUPPORT |
836 | |
837 | static void |
838 | dso_cache__free(struct dso *dso) |
839 | { |
840 | struct rb_root *root = &dso->data.cache; |
841 | struct rb_node *next = rb_first(root); |
842 | |
843 | mutex_lock(&dso->lock); |
844 | while (next) { |
845 | struct dso_cache *cache; |
846 | |
847 | cache = rb_entry(next, struct dso_cache, rb_node); |
848 | next = rb_next(&cache->rb_node); |
849 | rb_erase(&cache->rb_node, root); |
850 | free(cache); |
851 | } |
852 | mutex_unlock(lock: &dso->lock); |
853 | } |
854 | |
855 | static struct dso_cache *__dso_cache__find(struct dso *dso, u64 offset) |
856 | { |
857 | const struct rb_root *root = &dso->data.cache; |
858 | struct rb_node * const *p = &root->rb_node; |
859 | const struct rb_node *parent = NULL; |
860 | struct dso_cache *cache; |
861 | |
862 | while (*p != NULL) { |
863 | u64 end; |
864 | |
865 | parent = *p; |
866 | cache = rb_entry(parent, struct dso_cache, rb_node); |
867 | end = cache->offset + DSO__DATA_CACHE_SIZE; |
868 | |
869 | if (offset < cache->offset) |
870 | p = &(*p)->rb_left; |
871 | else if (offset >= end) |
872 | p = &(*p)->rb_right; |
873 | else |
874 | return cache; |
875 | } |
876 | |
877 | return NULL; |
878 | } |
879 | |
880 | static struct dso_cache * |
881 | dso_cache__insert(struct dso *dso, struct dso_cache *new) |
882 | { |
883 | struct rb_root *root = &dso->data.cache; |
884 | struct rb_node **p = &root->rb_node; |
885 | struct rb_node *parent = NULL; |
886 | struct dso_cache *cache; |
887 | u64 offset = new->offset; |
888 | |
889 | mutex_lock(&dso->lock); |
890 | while (*p != NULL) { |
891 | u64 end; |
892 | |
893 | parent = *p; |
894 | cache = rb_entry(parent, struct dso_cache, rb_node); |
895 | end = cache->offset + DSO__DATA_CACHE_SIZE; |
896 | |
897 | if (offset < cache->offset) |
898 | p = &(*p)->rb_left; |
899 | else if (offset >= end) |
900 | p = &(*p)->rb_right; |
901 | else |
902 | goto out; |
903 | } |
904 | |
905 | rb_link_node(node: &new->rb_node, parent, rb_link: p); |
906 | rb_insert_color(&new->rb_node, root); |
907 | |
908 | cache = NULL; |
909 | out: |
910 | mutex_unlock(lock: &dso->lock); |
911 | return cache; |
912 | } |
913 | |
914 | static ssize_t dso_cache__memcpy(struct dso_cache *cache, u64 offset, u8 *data, |
915 | u64 size, bool out) |
916 | { |
917 | u64 cache_offset = offset - cache->offset; |
918 | u64 cache_size = min(cache->size - cache_offset, size); |
919 | |
920 | if (out) |
921 | memcpy(data, cache->data + cache_offset, cache_size); |
922 | else |
923 | memcpy(cache->data + cache_offset, data, cache_size); |
924 | return cache_size; |
925 | } |
926 | |
927 | static ssize_t file_read(struct dso *dso, struct machine *machine, |
928 | u64 offset, char *data) |
929 | { |
930 | ssize_t ret; |
931 | |
932 | pthread_mutex_lock(&dso__data_open_lock); |
933 | |
934 | /* |
935 | * dso->data.fd might be closed if other thread opened another |
936 | * file (dso) due to open file limit (RLIMIT_NOFILE). |
937 | */ |
938 | try_to_open_dso(dso, machine); |
939 | |
940 | if (dso->data.fd < 0) { |
941 | dso->data.status = DSO_DATA_STATUS_ERROR; |
942 | ret = -errno; |
943 | goto out; |
944 | } |
945 | |
946 | ret = pread(dso->data.fd, data, DSO__DATA_CACHE_SIZE, offset); |
947 | out: |
948 | pthread_mutex_unlock(&dso__data_open_lock); |
949 | return ret; |
950 | } |
951 | |
952 | static struct dso_cache *dso_cache__populate(struct dso *dso, |
953 | struct machine *machine, |
954 | u64 offset, ssize_t *ret) |
955 | { |
956 | u64 cache_offset = offset & DSO__DATA_CACHE_MASK; |
957 | struct dso_cache *cache; |
958 | struct dso_cache *old; |
959 | |
960 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); |
961 | if (!cache) { |
962 | *ret = -ENOMEM; |
963 | return NULL; |
964 | } |
965 | #ifdef HAVE_LIBBPF_SUPPORT |
966 | if (dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO) |
967 | *ret = bpf_read(dso, cache_offset, cache->data); |
968 | else |
969 | #endif |
970 | if (dso->binary_type == DSO_BINARY_TYPE__OOL) |
971 | *ret = DSO__DATA_CACHE_SIZE; |
972 | else |
973 | *ret = file_read(dso, machine, offset: cache_offset, data: cache->data); |
974 | |
975 | if (*ret <= 0) { |
976 | free(cache); |
977 | return NULL; |
978 | } |
979 | |
980 | cache->offset = cache_offset; |
981 | cache->size = *ret; |
982 | |
983 | old = dso_cache__insert(dso, new: cache); |
984 | if (old) { |
985 | /* we lose the race */ |
986 | free(cache); |
987 | cache = old; |
988 | } |
989 | |
990 | return cache; |
991 | } |
992 | |
993 | static struct dso_cache *dso_cache__find(struct dso *dso, |
994 | struct machine *machine, |
995 | u64 offset, |
996 | ssize_t *ret) |
997 | { |
998 | struct dso_cache *cache = __dso_cache__find(dso, offset); |
999 | |
1000 | return cache ? cache : dso_cache__populate(dso, machine, offset, ret); |
1001 | } |
1002 | |
1003 | static ssize_t dso_cache_io(struct dso *dso, struct machine *machine, |
1004 | u64 offset, u8 *data, ssize_t size, bool out) |
1005 | { |
1006 | struct dso_cache *cache; |
1007 | ssize_t ret = 0; |
1008 | |
1009 | cache = dso_cache__find(dso, machine, offset, ret: &ret); |
1010 | if (!cache) |
1011 | return ret; |
1012 | |
1013 | return dso_cache__memcpy(cache, offset, data, size, out); |
1014 | } |
1015 | |
1016 | /* |
1017 | * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks |
1018 | * in the rb_tree. Any read to already cached data is served |
1019 | * by cached data. Writes update the cache only, not the backing file. |
1020 | */ |
1021 | static ssize_t cached_io(struct dso *dso, struct machine *machine, |
1022 | u64 offset, u8 *data, ssize_t size, bool out) |
1023 | { |
1024 | ssize_t r = 0; |
1025 | u8 *p = data; |
1026 | |
1027 | do { |
1028 | ssize_t ret; |
1029 | |
1030 | ret = dso_cache_io(dso, machine, offset, data: p, size, out); |
1031 | if (ret < 0) |
1032 | return ret; |
1033 | |
1034 | /* Reached EOF, return what we have. */ |
1035 | if (!ret) |
1036 | break; |
1037 | |
1038 | BUG_ON(ret > size); |
1039 | |
1040 | r += ret; |
1041 | p += ret; |
1042 | offset += ret; |
1043 | size -= ret; |
1044 | |
1045 | } while (size); |
1046 | |
1047 | return r; |
1048 | } |
1049 | |
1050 | static int file_size(struct dso *dso, struct machine *machine) |
1051 | { |
1052 | int ret = 0; |
1053 | struct stat st; |
1054 | char sbuf[STRERR_BUFSIZE]; |
1055 | |
1056 | pthread_mutex_lock(&dso__data_open_lock); |
1057 | |
1058 | /* |
1059 | * dso->data.fd might be closed if other thread opened another |
1060 | * file (dso) due to open file limit (RLIMIT_NOFILE). |
1061 | */ |
1062 | try_to_open_dso(dso, machine); |
1063 | |
1064 | if (dso->data.fd < 0) { |
1065 | ret = -errno; |
1066 | dso->data.status = DSO_DATA_STATUS_ERROR; |
1067 | goto out; |
1068 | } |
1069 | |
1070 | if (fstat(dso->data.fd, &st) < 0) { |
1071 | ret = -errno; |
1072 | pr_err("dso cache fstat failed: %s\n" , |
1073 | str_error_r(errno, sbuf, sizeof(sbuf))); |
1074 | dso->data.status = DSO_DATA_STATUS_ERROR; |
1075 | goto out; |
1076 | } |
1077 | dso->data.file_size = st.st_size; |
1078 | |
1079 | out: |
1080 | pthread_mutex_unlock(&dso__data_open_lock); |
1081 | return ret; |
1082 | } |
1083 | |
1084 | int dso__data_file_size(struct dso *dso, struct machine *machine) |
1085 | { |
1086 | if (dso->data.file_size) |
1087 | return 0; |
1088 | |
1089 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
1090 | return -1; |
1091 | #ifdef HAVE_LIBBPF_SUPPORT |
1092 | if (dso->binary_type == DSO_BINARY_TYPE__BPF_PROG_INFO) |
1093 | return bpf_size(dso); |
1094 | #endif |
1095 | return file_size(dso, machine); |
1096 | } |
1097 | |
1098 | /** |
1099 | * dso__data_size - Return dso data size |
1100 | * @dso: dso object |
1101 | * @machine: machine object |
1102 | * |
1103 | * Return: dso data size |
1104 | */ |
1105 | off_t dso__data_size(struct dso *dso, struct machine *machine) |
1106 | { |
1107 | if (dso__data_file_size(dso, machine)) |
1108 | return -1; |
1109 | |
1110 | /* For now just estimate dso data size is close to file size */ |
1111 | return dso->data.file_size; |
1112 | } |
1113 | |
1114 | static ssize_t data_read_write_offset(struct dso *dso, struct machine *machine, |
1115 | u64 offset, u8 *data, ssize_t size, |
1116 | bool out) |
1117 | { |
1118 | if (dso__data_file_size(dso, machine)) |
1119 | return -1; |
1120 | |
1121 | /* Check the offset sanity. */ |
1122 | if (offset > dso->data.file_size) |
1123 | return -1; |
1124 | |
1125 | if (offset + size < offset) |
1126 | return -1; |
1127 | |
1128 | return cached_io(dso, machine, offset, data, size, out); |
1129 | } |
1130 | |
1131 | /** |
1132 | * dso__data_read_offset - Read data from dso file offset |
1133 | * @dso: dso object |
1134 | * @machine: machine object |
1135 | * @offset: file offset |
1136 | * @data: buffer to store data |
1137 | * @size: size of the @data buffer |
1138 | * |
1139 | * External interface to read data from dso file offset. Open |
1140 | * dso data file and use cached_read to get the data. |
1141 | */ |
1142 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, |
1143 | u64 offset, u8 *data, ssize_t size) |
1144 | { |
1145 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
1146 | return -1; |
1147 | |
1148 | return data_read_write_offset(dso, machine, offset, data, size, out: true); |
1149 | } |
1150 | |
1151 | /** |
1152 | * dso__data_read_addr - Read data from dso address |
1153 | * @dso: dso object |
1154 | * @machine: machine object |
1155 | * @add: virtual memory address |
1156 | * @data: buffer to store data |
1157 | * @size: size of the @data buffer |
1158 | * |
1159 | * External interface to read data from dso address. |
1160 | */ |
1161 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, |
1162 | struct machine *machine, u64 addr, |
1163 | u8 *data, ssize_t size) |
1164 | { |
1165 | u64 offset = map__map_ip(map, ip_or_rip: addr); |
1166 | |
1167 | return dso__data_read_offset(dso, machine, offset, data, size); |
1168 | } |
1169 | |
1170 | /** |
1171 | * dso__data_write_cache_offs - Write data to dso data cache at file offset |
1172 | * @dso: dso object |
1173 | * @machine: machine object |
1174 | * @offset: file offset |
1175 | * @data: buffer to write |
1176 | * @size: size of the @data buffer |
1177 | * |
1178 | * Write into the dso file data cache, but do not change the file itself. |
1179 | */ |
1180 | ssize_t dso__data_write_cache_offs(struct dso *dso, struct machine *machine, |
1181 | u64 offset, const u8 *data_in, ssize_t size) |
1182 | { |
1183 | u8 *data = (u8 *)data_in; /* cast away const to use same fns for r/w */ |
1184 | |
1185 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
1186 | return -1; |
1187 | |
1188 | return data_read_write_offset(dso, machine, offset, data, size, out: false); |
1189 | } |
1190 | |
1191 | /** |
1192 | * dso__data_write_cache_addr - Write data to dso data cache at dso address |
1193 | * @dso: dso object |
1194 | * @machine: machine object |
1195 | * @add: virtual memory address |
1196 | * @data: buffer to write |
1197 | * @size: size of the @data buffer |
1198 | * |
1199 | * External interface to write into the dso file data cache, but do not change |
1200 | * the file itself. |
1201 | */ |
1202 | ssize_t dso__data_write_cache_addr(struct dso *dso, struct map *map, |
1203 | struct machine *machine, u64 addr, |
1204 | const u8 *data, ssize_t size) |
1205 | { |
1206 | u64 offset = map__map_ip(map, ip_or_rip: addr); |
1207 | |
1208 | return dso__data_write_cache_offs(dso, machine, offset, data_in: data, size); |
1209 | } |
1210 | |
1211 | struct map *dso__new_map(const char *name) |
1212 | { |
1213 | struct map *map = NULL; |
1214 | struct dso *dso = dso__new(name); |
1215 | |
1216 | if (dso) { |
1217 | map = map__new2(start: 0, dso); |
1218 | dso__put(dso); |
1219 | } |
1220 | |
1221 | return map; |
1222 | } |
1223 | |
1224 | struct dso *machine__findnew_kernel(struct machine *machine, const char *name, |
1225 | const char *short_name, int dso_type) |
1226 | { |
1227 | /* |
1228 | * The kernel dso could be created by build_id processing. |
1229 | */ |
1230 | struct dso *dso = machine__findnew_dso(machine, filename: name); |
1231 | |
1232 | /* |
1233 | * We need to run this in all cases, since during the build_id |
1234 | * processing we had no idea this was the kernel dso. |
1235 | */ |
1236 | if (dso != NULL) { |
1237 | dso__set_short_name(dso, name: short_name, name_allocated: false); |
1238 | dso->kernel = dso_type; |
1239 | } |
1240 | |
1241 | return dso; |
1242 | } |
1243 | |
1244 | static void dso__set_long_name_id(struct dso *dso, const char *name, struct dso_id *id, bool name_allocated) |
1245 | { |
1246 | struct rb_root *root = dso->root; |
1247 | |
1248 | if (name == NULL) |
1249 | return; |
1250 | |
1251 | if (dso->long_name_allocated) |
1252 | free((char *)dso->long_name); |
1253 | |
1254 | if (root) { |
1255 | rb_erase(&dso->rb_node, root); |
1256 | /* |
1257 | * __dsos__findnew_link_by_longname_id() isn't guaranteed to |
1258 | * add it back, so a clean removal is required here. |
1259 | */ |
1260 | RB_CLEAR_NODE(&dso->rb_node); |
1261 | dso->root = NULL; |
1262 | } |
1263 | |
1264 | dso->long_name = name; |
1265 | dso->long_name_len = strlen(name); |
1266 | dso->long_name_allocated = name_allocated; |
1267 | |
1268 | if (root) |
1269 | __dsos__findnew_link_by_longname_id(root, dso, NULL, id); |
1270 | } |
1271 | |
1272 | void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) |
1273 | { |
1274 | dso__set_long_name_id(dso, name, NULL, name_allocated); |
1275 | } |
1276 | |
1277 | void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) |
1278 | { |
1279 | if (name == NULL) |
1280 | return; |
1281 | |
1282 | if (dso->short_name_allocated) |
1283 | free((char *)dso->short_name); |
1284 | |
1285 | dso->short_name = name; |
1286 | dso->short_name_len = strlen(name); |
1287 | dso->short_name_allocated = name_allocated; |
1288 | } |
1289 | |
1290 | int dso__name_len(const struct dso *dso) |
1291 | { |
1292 | if (!dso) |
1293 | return strlen("[unknown]" ); |
1294 | if (verbose > 0) |
1295 | return dso->long_name_len; |
1296 | |
1297 | return dso->short_name_len; |
1298 | } |
1299 | |
1300 | bool dso__loaded(const struct dso *dso) |
1301 | { |
1302 | return dso->loaded; |
1303 | } |
1304 | |
1305 | bool dso__sorted_by_name(const struct dso *dso) |
1306 | { |
1307 | return dso->sorted_by_name; |
1308 | } |
1309 | |
1310 | void dso__set_sorted_by_name(struct dso *dso) |
1311 | { |
1312 | dso->sorted_by_name = true; |
1313 | } |
1314 | |
1315 | struct dso *dso__new_id(const char *name, struct dso_id *id) |
1316 | { |
1317 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); |
1318 | |
1319 | if (dso != NULL) { |
1320 | strcpy(p: dso->name, q: name); |
1321 | if (id) |
1322 | dso->id = *id; |
1323 | dso__set_long_name_id(dso, name: dso->name, id, name_allocated: false); |
1324 | dso__set_short_name(dso, name: dso->name, name_allocated: false); |
1325 | dso->symbols = RB_ROOT_CACHED; |
1326 | dso->symbol_names = NULL; |
1327 | dso->symbol_names_len = 0; |
1328 | dso->data.cache = RB_ROOT; |
1329 | dso->inlined_nodes = RB_ROOT_CACHED; |
1330 | dso->srclines = RB_ROOT_CACHED; |
1331 | dso->data_types = RB_ROOT; |
1332 | dso->data.fd = -1; |
1333 | dso->data.status = DSO_DATA_STATUS_UNKNOWN; |
1334 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
1335 | dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; |
1336 | dso->is_64_bit = (sizeof(void *) == 8); |
1337 | dso->loaded = 0; |
1338 | dso->rel = 0; |
1339 | dso->sorted_by_name = 0; |
1340 | dso->has_build_id = 0; |
1341 | dso->has_srcline = 1; |
1342 | dso->a2l_fails = 1; |
1343 | dso->kernel = DSO_SPACE__USER; |
1344 | dso->is_kmod = 0; |
1345 | dso->needs_swap = DSO_SWAP__UNSET; |
1346 | dso->comp = COMP_ID__NONE; |
1347 | RB_CLEAR_NODE(&dso->rb_node); |
1348 | dso->root = NULL; |
1349 | INIT_LIST_HEAD(list: &dso->node); |
1350 | INIT_LIST_HEAD(list: &dso->data.open_entry); |
1351 | mutex_init(&dso->lock); |
1352 | refcount_set(r: &dso->refcnt, n: 1); |
1353 | } |
1354 | |
1355 | return dso; |
1356 | } |
1357 | |
1358 | struct dso *dso__new(const char *name) |
1359 | { |
1360 | return dso__new_id(name, NULL); |
1361 | } |
1362 | |
1363 | void dso__delete(struct dso *dso) |
1364 | { |
1365 | if (!RB_EMPTY_NODE(&dso->rb_node)) |
1366 | pr_err("DSO %s is still in rbtree when being deleted!\n" , |
1367 | dso->long_name); |
1368 | |
1369 | /* free inlines first, as they reference symbols */ |
1370 | inlines__tree_delete(tree: &dso->inlined_nodes); |
1371 | srcline__tree_delete(tree: &dso->srclines); |
1372 | symbols__delete(symbols: &dso->symbols); |
1373 | dso->symbol_names_len = 0; |
1374 | zfree(&dso->symbol_names); |
1375 | annotated_data_type__tree_delete(root: &dso->data_types); |
1376 | |
1377 | if (dso->short_name_allocated) { |
1378 | zfree((char **)&dso->short_name); |
1379 | dso->short_name_allocated = false; |
1380 | } |
1381 | |
1382 | if (dso->long_name_allocated) { |
1383 | zfree((char **)&dso->long_name); |
1384 | dso->long_name_allocated = false; |
1385 | } |
1386 | |
1387 | dso__data_close(dso); |
1388 | auxtrace_cache__free(auxtrace_cache: dso->auxtrace_cache); |
1389 | dso_cache__free(dso); |
1390 | dso__free_a2l(dso); |
1391 | zfree(&dso->symsrc_filename); |
1392 | nsinfo__zput(dso->nsinfo); |
1393 | mutex_destroy(lock: &dso->lock); |
1394 | free(dso); |
1395 | } |
1396 | |
1397 | struct dso *dso__get(struct dso *dso) |
1398 | { |
1399 | if (dso) |
1400 | refcount_inc(r: &dso->refcnt); |
1401 | return dso; |
1402 | } |
1403 | |
1404 | void dso__put(struct dso *dso) |
1405 | { |
1406 | if (dso && refcount_dec_and_test(r: &dso->refcnt)) |
1407 | dso__delete(dso); |
1408 | } |
1409 | |
1410 | void dso__set_build_id(struct dso *dso, struct build_id *bid) |
1411 | { |
1412 | dso->bid = *bid; |
1413 | dso->has_build_id = 1; |
1414 | } |
1415 | |
1416 | bool dso__build_id_equal(const struct dso *dso, struct build_id *bid) |
1417 | { |
1418 | if (dso->bid.size > bid->size && dso->bid.size == BUILD_ID_SIZE) { |
1419 | /* |
1420 | * For the backward compatibility, it allows a build-id has |
1421 | * trailing zeros. |
1422 | */ |
1423 | return !memcmp(p: dso->bid.data, q: bid->data, size: bid->size) && |
1424 | !memchr_inv(p: &dso->bid.data[bid->size], c: 0, |
1425 | size: dso->bid.size - bid->size); |
1426 | } |
1427 | |
1428 | return dso->bid.size == bid->size && |
1429 | memcmp(p: dso->bid.data, q: bid->data, size: dso->bid.size) == 0; |
1430 | } |
1431 | |
1432 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) |
1433 | { |
1434 | char path[PATH_MAX]; |
1435 | |
1436 | if (machine__is_default_guest(machine)) |
1437 | return; |
1438 | sprintf(buf: path, fmt: "%s/sys/kernel/notes" , machine->root_dir); |
1439 | if (sysfs__read_build_id(filename: path, bid: &dso->bid) == 0) |
1440 | dso->has_build_id = true; |
1441 | } |
1442 | |
1443 | int dso__kernel_module_get_build_id(struct dso *dso, |
1444 | const char *root_dir) |
1445 | { |
1446 | char filename[PATH_MAX]; |
1447 | /* |
1448 | * kernel module short names are of the form "[module]" and |
1449 | * we need just "module" here. |
1450 | */ |
1451 | const char *name = dso->short_name + 1; |
1452 | |
1453 | snprintf(buf: filename, size: sizeof(filename), |
1454 | fmt: "%s/sys/module/%.*s/notes/.note.gnu.build-id" , |
1455 | root_dir, (int)strlen(name) - 1, name); |
1456 | |
1457 | if (sysfs__read_build_id(filename, bid: &dso->bid) == 0) |
1458 | dso->has_build_id = true; |
1459 | |
1460 | return 0; |
1461 | } |
1462 | |
1463 | static size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) |
1464 | { |
1465 | char sbuild_id[SBUILD_ID_SIZE]; |
1466 | |
1467 | build_id__sprintf(build_id: &dso->bid, bf: sbuild_id); |
1468 | return fprintf(fp, "%s" , sbuild_id); |
1469 | } |
1470 | |
1471 | size_t dso__fprintf(struct dso *dso, FILE *fp) |
1472 | { |
1473 | struct rb_node *nd; |
1474 | size_t ret = fprintf(fp, "dso: %s (" , dso->short_name); |
1475 | |
1476 | if (dso->short_name != dso->long_name) |
1477 | ret += fprintf(fp, "%s, " , dso->long_name); |
1478 | ret += fprintf(fp, "%sloaded, " , dso__loaded(dso) ? "" : "NOT " ); |
1479 | ret += dso__fprintf_buildid(dso, fp); |
1480 | ret += fprintf(fp, ")\n" ); |
1481 | for (nd = rb_first_cached(&dso->symbols); nd; nd = rb_next(nd)) { |
1482 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
1483 | ret += symbol__fprintf(pos, fp); |
1484 | } |
1485 | |
1486 | return ret; |
1487 | } |
1488 | |
1489 | enum dso_type dso__type(struct dso *dso, struct machine *machine) |
1490 | { |
1491 | int fd; |
1492 | enum dso_type type = DSO__TYPE_UNKNOWN; |
1493 | |
1494 | fd = dso__data_get_fd(dso, machine); |
1495 | if (fd >= 0) { |
1496 | type = dso__type_fd(fd); |
1497 | dso__data_put_fd(dso); |
1498 | } |
1499 | |
1500 | return type; |
1501 | } |
1502 | |
1503 | int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) |
1504 | { |
1505 | int idx, errnum = dso->load_errno; |
1506 | /* |
1507 | * This must have a same ordering as the enum dso_load_errno. |
1508 | */ |
1509 | static const char *dso_load__error_str[] = { |
1510 | "Internal tools/perf/ library error" , |
1511 | "Invalid ELF file" , |
1512 | "Can not read build id" , |
1513 | "Mismatching build id" , |
1514 | "Decompression failure" , |
1515 | }; |
1516 | |
1517 | BUG_ON(buflen == 0); |
1518 | |
1519 | if (errnum >= 0) { |
1520 | const char *err = str_error_r(errnum, buf, buflen); |
1521 | |
1522 | if (err != buf) |
1523 | scnprintf(buf, size: buflen, fmt: "%s" , err); |
1524 | |
1525 | return 0; |
1526 | } |
1527 | |
1528 | if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END) |
1529 | return -1; |
1530 | |
1531 | idx = errnum - __DSO_LOAD_ERRNO__START; |
1532 | scnprintf(buf, size: buflen, fmt: "%s" , dso_load__error_str[idx]); |
1533 | return 0; |
1534 | } |
1535 | |