Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
bda6ee4a | 2 | #include <asm/bug.h> |
877a7a11 | 3 | #include <linux/kernel.h> |
c6580451 JO |
4 | #include <sys/time.h> |
5 | #include <sys/resource.h> | |
7a8ef4c4 ACM |
6 | #include <sys/types.h> |
7 | #include <sys/stat.h> | |
8 | #include <unistd.h> | |
a43783ae | 9 | #include <errno.h> |
c23c2a0f | 10 | #include <fcntl.h> |
611f0afe | 11 | #include "compress.h" |
9a3993d4 | 12 | #include "path.h" |
cdd059d7 | 13 | #include "symbol.h" |
11ea2515 | 14 | #include "srcline.h" |
cdd059d7 | 15 | #include "dso.h" |
69d2591a | 16 | #include "machine.h" |
cfe9174f | 17 | #include "auxtrace.h" |
cdd059d7 JO |
18 | #include "util.h" |
19 | #include "debug.h" | |
a067558e | 20 | #include "string2.h" |
6ae98ba6 | 21 | #include "vdso.h" |
cdd059d7 | 22 | |
9343e45b MGP |
23 | static const char * const debuglink_paths[] = { |
24 | "%.0s%s", | |
25 | "%s/%s", | |
26 | "%s/.debug/%s", | |
27 | "/usr/lib/debug%s/%s" | |
28 | }; | |
29 | ||
cdd059d7 JO |
30 | char dso__symtab_origin(const struct dso *dso) |
31 | { | |
32 | static const char origin[] = { | |
9cd00941 RRD |
33 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
34 | [DSO_BINARY_TYPE__VMLINUX] = 'v', | |
35 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
36 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
37 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
d2396999 | 38 | [DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO] = 'D', |
9cd00941 RRD |
39 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', |
40 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
41 | [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', | |
42 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
43 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
44 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
c00c48fc | 45 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm', |
9cd00941 RRD |
46 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', |
47 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
c00c48fc | 48 | [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', |
9cd00941 | 49 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', |
cdd059d7 JO |
50 | }; |
51 | ||
52 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
53 | return '!'; | |
54 | return origin[dso->symtab_type]; | |
55 | } | |
56 | ||
ee4e9625 ACM |
57 | int dso__read_binary_type_filename(const struct dso *dso, |
58 | enum dso_binary_type type, | |
59 | char *root_dir, char *filename, size_t size) | |
cdd059d7 | 60 | { |
b5d8bbe8 | 61 | char build_id_hex[SBUILD_ID_SIZE]; |
cdd059d7 | 62 | int ret = 0; |
972f393b | 63 | size_t len; |
cdd059d7 JO |
64 | |
65 | switch (type) { | |
9343e45b MGP |
66 | case DSO_BINARY_TYPE__DEBUGLINK: |
67 | { | |
68 | const char *last_slash; | |
69 | char dso_dir[PATH_MAX]; | |
70 | char symfile[PATH_MAX]; | |
71 | unsigned int i; | |
cdd059d7 | 72 | |
dc6254cf | 73 | len = __symbol__join_symfs(filename, size, dso->long_name); |
9343e45b MGP |
74 | last_slash = filename + len; |
75 | while (last_slash != filename && *last_slash != '/') | |
76 | last_slash--; | |
40356721 | 77 | |
9343e45b MGP |
78 | strncpy(dso_dir, filename, last_slash - filename); |
79 | dso_dir[last_slash-filename] = '\0'; | |
80 | ||
81 | if (!is_regular_file(filename)) { | |
82 | ret = -1; | |
40356721 | 83 | break; |
9343e45b | 84 | } |
40356721 | 85 | |
9343e45b MGP |
86 | ret = filename__read_debuglink(filename, symfile, PATH_MAX); |
87 | if (ret) | |
88 | break; | |
89 | ||
90 | /* Check predefined locations where debug file might reside */ | |
91 | ret = -1; | |
92 | for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) { | |
93 | snprintf(filename, size, | |
94 | debuglink_paths[i], dso_dir, symfile); | |
95 | if (is_regular_file(filename)) { | |
96 | ret = 0; | |
97 | break; | |
98 | } | |
cdd059d7 | 99 | } |
9343e45b | 100 | |
cdd059d7 | 101 | break; |
9343e45b | 102 | } |
cdd059d7 | 103 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: |
d2396999 KJ |
104 | if (dso__build_id_filename(dso, filename, size, false) == NULL) |
105 | ret = -1; | |
106 | break; | |
107 | ||
108 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: | |
109 | if (dso__build_id_filename(dso, filename, size, true) == NULL) | |
cdd059d7 JO |
110 | ret = -1; |
111 | break; | |
112 | ||
113 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
972f393b ACM |
114 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
115 | snprintf(filename + len, size - len, "%s.debug", dso->long_name); | |
cdd059d7 JO |
116 | break; |
117 | ||
118 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
972f393b ACM |
119 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
120 | snprintf(filename + len, size - len, "%s", dso->long_name); | |
cdd059d7 JO |
121 | break; |
122 | ||
9cd00941 RRD |
123 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
124 | { | |
bf4414ae | 125 | const char *last_slash; |
9cd00941 RRD |
126 | size_t dir_size; |
127 | ||
128 | last_slash = dso->long_name + dso->long_name_len; | |
129 | while (last_slash != dso->long_name && *last_slash != '/') | |
130 | last_slash--; | |
131 | ||
972f393b | 132 | len = __symbol__join_symfs(filename, size, ""); |
9cd00941 RRD |
133 | dir_size = last_slash - dso->long_name + 2; |
134 | if (dir_size > (size - len)) { | |
135 | ret = -1; | |
136 | break; | |
137 | } | |
7d2a5122 ACM |
138 | len += scnprintf(filename + len, dir_size, "%s", dso->long_name); |
139 | len += scnprintf(filename + len , size - len, ".debug%s", | |
9cd00941 RRD |
140 | last_slash); |
141 | break; | |
142 | } | |
143 | ||
cdd059d7 JO |
144 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
145 | if (!dso->has_build_id) { | |
146 | ret = -1; | |
147 | break; | |
148 | } | |
149 | ||
150 | build_id__sprintf(dso->build_id, | |
151 | sizeof(dso->build_id), | |
152 | build_id_hex); | |
972f393b ACM |
153 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); |
154 | snprintf(filename + len, size - len, "%.2s/%s.debug", | |
155 | build_id_hex, build_id_hex + 2); | |
cdd059d7 JO |
156 | break; |
157 | ||
39b12f78 AH |
158 | case DSO_BINARY_TYPE__VMLINUX: |
159 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
cdd059d7 | 160 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
972f393b | 161 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
162 | break; |
163 | ||
164 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 165 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
972f393b ACM |
166 | path__join3(filename, size, symbol_conf.symfs, |
167 | root_dir, dso->long_name); | |
cdd059d7 JO |
168 | break; |
169 | ||
170 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
c00c48fc | 171 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
972f393b | 172 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
173 | break; |
174 | ||
8e0cf965 AH |
175 | case DSO_BINARY_TYPE__KCORE: |
176 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
7d2a5122 | 177 | snprintf(filename, size, "%s", dso->long_name); |
8e0cf965 AH |
178 | break; |
179 | ||
cdd059d7 JO |
180 | default: |
181 | case DSO_BINARY_TYPE__KALLSYMS: | |
cdd059d7 | 182 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
cdd059d7 JO |
183 | case DSO_BINARY_TYPE__JAVA_JIT: |
184 | case DSO_BINARY_TYPE__NOT_FOUND: | |
185 | ret = -1; | |
186 | break; | |
187 | } | |
188 | ||
189 | return ret; | |
190 | } | |
191 | ||
4b838b0d JO |
192 | enum { |
193 | COMP_ID__NONE = 0, | |
194 | }; | |
195 | ||
c00c48fc NK |
196 | static const struct { |
197 | const char *fmt; | |
198 | int (*decompress)(const char *input, int output); | |
199 | } compressions[] = { | |
4b838b0d | 200 | [COMP_ID__NONE] = { .fmt = NULL, }, |
e92ce12e NK |
201 | #ifdef HAVE_ZLIB_SUPPORT |
202 | { "gz", gzip_decompress_to_file }, | |
80a32e5b JO |
203 | #endif |
204 | #ifdef HAVE_LZMA_SUPPORT | |
205 | { "xz", lzma_decompress_to_file }, | |
e92ce12e NK |
206 | #endif |
207 | { NULL, NULL }, | |
c00c48fc NK |
208 | }; |
209 | ||
4b838b0d | 210 | static int is_supported_compression(const char *ext) |
c00c48fc NK |
211 | { |
212 | unsigned i; | |
213 | ||
4b838b0d | 214 | for (i = 1; compressions[i].fmt; i++) { |
c00c48fc | 215 | if (!strcmp(ext, compressions[i].fmt)) |
4b838b0d | 216 | return i; |
c00c48fc | 217 | } |
4b838b0d | 218 | return COMP_ID__NONE; |
c00c48fc NK |
219 | } |
220 | ||
1f121b03 | 221 | bool is_kernel_module(const char *pathname, int cpumode) |
c00c48fc | 222 | { |
8dee9ff1 | 223 | struct kmod_path m; |
1f121b03 WN |
224 | int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK; |
225 | ||
226 | WARN_ONCE(mode != cpumode, | |
227 | "Internal error: passing unmasked cpumode (%x) to is_kernel_module", | |
228 | cpumode); | |
229 | ||
230 | switch (mode) { | |
231 | case PERF_RECORD_MISC_USER: | |
232 | case PERF_RECORD_MISC_HYPERVISOR: | |
233 | case PERF_RECORD_MISC_GUEST_USER: | |
234 | return false; | |
235 | /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */ | |
236 | default: | |
237 | if (kmod_path__parse(&m, pathname)) { | |
238 | pr_err("Failed to check whether %s is a kernel module or not. Assume it is.", | |
239 | pathname); | |
240 | return true; | |
241 | } | |
242 | } | |
c00c48fc | 243 | |
8dee9ff1 | 244 | return m.kmod; |
c00c48fc NK |
245 | } |
246 | ||
c00c48fc NK |
247 | bool dso__needs_decompress(struct dso *dso) |
248 | { | |
249 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || | |
250 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
251 | } | |
252 | ||
c9a8a613 JO |
253 | static int decompress_kmodule(struct dso *dso, const char *name, |
254 | char *pathname, size_t len) | |
42b3fa67 | 255 | { |
c9a8a613 | 256 | char tmpbuf[] = KMOD_DECOMP_NAME; |
42b3fa67 | 257 | int fd = -1; |
42b3fa67 NK |
258 | |
259 | if (!dso__needs_decompress(dso)) | |
260 | return -1; | |
261 | ||
dde755a9 | 262 | if (dso->comp == COMP_ID__NONE) |
42b3fa67 NK |
263 | return -1; |
264 | ||
42b3fa67 NK |
265 | fd = mkstemp(tmpbuf); |
266 | if (fd < 0) { | |
267 | dso->load_errno = errno; | |
dde755a9 | 268 | return -1; |
42b3fa67 NK |
269 | } |
270 | ||
dde755a9 | 271 | if (compressions[dso->comp].decompress(name, fd)) { |
42b3fa67 NK |
272 | dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE; |
273 | close(fd); | |
274 | fd = -1; | |
275 | } | |
276 | ||
c9a8a613 JO |
277 | if (!pathname || (fd < 0)) |
278 | unlink(tmpbuf); | |
279 | ||
280 | if (pathname && (fd >= 0)) | |
281 | strncpy(pathname, tmpbuf, len); | |
282 | ||
42b3fa67 NK |
283 | return fd; |
284 | } | |
285 | ||
286 | int dso__decompress_kmodule_fd(struct dso *dso, const char *name) | |
287 | { | |
c9a8a613 | 288 | return decompress_kmodule(dso, name, NULL, 0); |
42b3fa67 NK |
289 | } |
290 | ||
291 | int dso__decompress_kmodule_path(struct dso *dso, const char *name, | |
292 | char *pathname, size_t len) | |
293 | { | |
c9a8a613 | 294 | int fd = decompress_kmodule(dso, name, pathname, len); |
42b3fa67 | 295 | |
42b3fa67 | 296 | close(fd); |
c9a8a613 | 297 | return fd >= 0 ? 0 : -1; |
42b3fa67 NK |
298 | } |
299 | ||
3c8a67f5 JO |
300 | /* |
301 | * Parses kernel module specified in @path and updates | |
302 | * @m argument like: | |
303 | * | |
304 | * @comp - true if @path contains supported compression suffix, | |
305 | * false otherwise | |
306 | * @kmod - true if @path contains '.ko' suffix in right position, | |
307 | * false otherwise | |
308 | * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name | |
309 | * of the kernel module without suffixes, otherwise strudup-ed | |
310 | * base name of @path | |
311 | * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string | |
312 | * the compression suffix | |
313 | * | |
314 | * Returns 0 if there's no strdup error, -ENOMEM otherwise. | |
315 | */ | |
316 | int __kmod_path__parse(struct kmod_path *m, const char *path, | |
317 | bool alloc_name, bool alloc_ext) | |
318 | { | |
319 | const char *name = strrchr(path, '/'); | |
320 | const char *ext = strrchr(path, '.'); | |
1f121b03 | 321 | bool is_simple_name = false; |
3c8a67f5 JO |
322 | |
323 | memset(m, 0x0, sizeof(*m)); | |
324 | name = name ? name + 1 : path; | |
325 | ||
1f121b03 WN |
326 | /* |
327 | * '.' is also a valid character for module name. For example: | |
328 | * [aaa.bbb] is a valid module name. '[' should have higher | |
329 | * priority than '.ko' suffix. | |
330 | * | |
331 | * The kernel names are from machine__mmap_name. Such | |
332 | * name should belong to kernel itself, not kernel module. | |
333 | */ | |
334 | if (name[0] == '[') { | |
335 | is_simple_name = true; | |
336 | if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) || | |
337 | (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) || | |
338 | (strncmp(name, "[vdso]", 6) == 0) || | |
aef4feac AH |
339 | (strncmp(name, "[vdso32]", 8) == 0) || |
340 | (strncmp(name, "[vdsox32]", 9) == 0) || | |
1f121b03 WN |
341 | (strncmp(name, "[vsyscall]", 10) == 0)) { |
342 | m->kmod = false; | |
343 | ||
344 | } else | |
345 | m->kmod = true; | |
346 | } | |
347 | ||
3c8a67f5 | 348 | /* No extension, just return name. */ |
1f121b03 | 349 | if ((ext == NULL) || is_simple_name) { |
3c8a67f5 JO |
350 | if (alloc_name) { |
351 | m->name = strdup(name); | |
352 | return m->name ? 0 : -ENOMEM; | |
353 | } | |
354 | return 0; | |
355 | } | |
356 | ||
4b838b0d JO |
357 | m->comp = is_supported_compression(ext + 1); |
358 | if (m->comp > COMP_ID__NONE) | |
3c8a67f5 | 359 | ext -= 3; |
3c8a67f5 JO |
360 | |
361 | /* Check .ko extension only if there's enough name left. */ | |
362 | if (ext > name) | |
363 | m->kmod = !strncmp(ext, ".ko", 3); | |
364 | ||
365 | if (alloc_name) { | |
366 | if (m->kmod) { | |
367 | if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1) | |
368 | return -ENOMEM; | |
369 | } else { | |
370 | if (asprintf(&m->name, "%s", name) == -1) | |
371 | return -ENOMEM; | |
372 | } | |
373 | ||
374 | strxfrchar(m->name, '-', '_'); | |
375 | } | |
376 | ||
377 | if (alloc_ext && m->comp) { | |
378 | m->ext = strdup(ext + 4); | |
379 | if (!m->ext) { | |
380 | free((void *) m->name); | |
381 | return -ENOMEM; | |
382 | } | |
383 | } | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
6b335e8f NK |
388 | void dso__set_module_info(struct dso *dso, struct kmod_path *m, |
389 | struct machine *machine) | |
390 | { | |
391 | if (machine__is_host(machine)) | |
392 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
393 | else | |
394 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
395 | ||
396 | /* _KMODULE_COMP should be next to _KMODULE */ | |
2af52475 | 397 | if (m->kmod && m->comp) { |
6b335e8f | 398 | dso->symtab_type++; |
2af52475 JO |
399 | dso->comp = m->comp; |
400 | } | |
6b335e8f NK |
401 | |
402 | dso__set_short_name(dso, strdup(m->name), true); | |
403 | } | |
404 | ||
eba5102d | 405 | /* |
bda6ee4a | 406 | * Global list of open DSOs and the counter. |
eba5102d JO |
407 | */ |
408 | static LIST_HEAD(dso__data_open); | |
bda6ee4a | 409 | static long dso__data_open_cnt; |
33bdedce | 410 | static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER; |
eba5102d JO |
411 | |
412 | static void dso__list_add(struct dso *dso) | |
413 | { | |
414 | list_add_tail(&dso->data.open_entry, &dso__data_open); | |
bda6ee4a | 415 | dso__data_open_cnt++; |
eba5102d JO |
416 | } |
417 | ||
418 | static void dso__list_del(struct dso *dso) | |
419 | { | |
420 | list_del(&dso->data.open_entry); | |
bda6ee4a JO |
421 | WARN_ONCE(dso__data_open_cnt <= 0, |
422 | "DSO data fd counter out of bounds."); | |
423 | dso__data_open_cnt--; | |
eba5102d JO |
424 | } |
425 | ||
a08cae03 JO |
426 | static void close_first_dso(void); |
427 | ||
428 | static int do_open(char *name) | |
429 | { | |
430 | int fd; | |
6e81c74c | 431 | char sbuf[STRERR_BUFSIZE]; |
a08cae03 JO |
432 | |
433 | do { | |
4c0d8d27 | 434 | fd = open(name, O_RDONLY|O_CLOEXEC); |
a08cae03 JO |
435 | if (fd >= 0) |
436 | return fd; | |
437 | ||
a3c0cc2a | 438 | pr_debug("dso open failed: %s\n", |
c8b5f2c9 | 439 | str_error_r(errno, sbuf, sizeof(sbuf))); |
a08cae03 JO |
440 | if (!dso__data_open_cnt || errno != EMFILE) |
441 | break; | |
442 | ||
443 | close_first_dso(); | |
444 | } while (1); | |
445 | ||
446 | return -1; | |
447 | } | |
448 | ||
eba5102d | 449 | static int __open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 450 | { |
8ba29adf | 451 | int fd = -EINVAL; |
ee4e9625 ACM |
452 | char *root_dir = (char *)""; |
453 | char *name = malloc(PATH_MAX); | |
d68a29c2 | 454 | bool decomp = false; |
cdd059d7 | 455 | |
cdd059d7 JO |
456 | if (!name) |
457 | return -ENOMEM; | |
458 | ||
459 | if (machine) | |
460 | root_dir = machine->root_dir; | |
461 | ||
5f70619d | 462 | if (dso__read_binary_type_filename(dso, dso->binary_type, |
8ba29adf NK |
463 | root_dir, name, PATH_MAX)) |
464 | goto out; | |
cdd059d7 | 465 | |
8ba29adf NK |
466 | if (!is_regular_file(name)) |
467 | goto out; | |
3c028a0c | 468 | |
1d6b3c9b NK |
469 | if (dso__needs_decompress(dso)) { |
470 | char newpath[KMOD_DECOMP_LEN]; | |
471 | size_t len = sizeof(newpath); | |
472 | ||
473 | if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) { | |
8ba29adf NK |
474 | fd = -dso->load_errno; |
475 | goto out; | |
1d6b3c9b NK |
476 | } |
477 | ||
d68a29c2 | 478 | decomp = true; |
1d6b3c9b NK |
479 | strcpy(name, newpath); |
480 | } | |
481 | ||
a08cae03 | 482 | fd = do_open(name); |
1d6b3c9b | 483 | |
d68a29c2 | 484 | if (decomp) |
1d6b3c9b NK |
485 | unlink(name); |
486 | ||
8ba29adf | 487 | out: |
cdd059d7 JO |
488 | free(name); |
489 | return fd; | |
490 | } | |
491 | ||
c6580451 JO |
492 | static void check_data_close(void); |
493 | ||
c1f9aa0a JO |
494 | /** |
495 | * dso_close - Open DSO data file | |
496 | * @dso: dso object | |
497 | * | |
498 | * Open @dso's data file descriptor and updates | |
499 | * list/count of open DSO objects. | |
500 | */ | |
eba5102d JO |
501 | static int open_dso(struct dso *dso, struct machine *machine) |
502 | { | |
f045b8c4 KJ |
503 | int fd; |
504 | struct nscookie nsc; | |
505 | ||
506 | if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) | |
507 | nsinfo__mountns_enter(dso->nsinfo, &nsc); | |
508 | fd = __open_dso(dso, machine); | |
509 | if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) | |
510 | nsinfo__mountns_exit(&nsc); | |
eba5102d | 511 | |
a6f6ae99 | 512 | if (fd >= 0) { |
eba5102d | 513 | dso__list_add(dso); |
c6580451 JO |
514 | /* |
515 | * Check if we crossed the allowed number | |
516 | * of opened DSOs and close one if needed. | |
517 | */ | |
518 | check_data_close(); | |
519 | } | |
eba5102d JO |
520 | |
521 | return fd; | |
522 | } | |
523 | ||
524 | static void close_data_fd(struct dso *dso) | |
53fa8eaa JO |
525 | { |
526 | if (dso->data.fd >= 0) { | |
527 | close(dso->data.fd); | |
528 | dso->data.fd = -1; | |
c3fbd2a6 | 529 | dso->data.file_size = 0; |
eba5102d | 530 | dso__list_del(dso); |
53fa8eaa JO |
531 | } |
532 | } | |
533 | ||
c1f9aa0a JO |
534 | /** |
535 | * dso_close - Close DSO data file | |
536 | * @dso: dso object | |
537 | * | |
538 | * Close @dso's data file descriptor and updates | |
539 | * list/count of open DSO objects. | |
540 | */ | |
eba5102d JO |
541 | static void close_dso(struct dso *dso) |
542 | { | |
543 | close_data_fd(dso); | |
544 | } | |
545 | ||
c6580451 JO |
546 | static void close_first_dso(void) |
547 | { | |
548 | struct dso *dso; | |
549 | ||
550 | dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); | |
551 | close_dso(dso); | |
552 | } | |
553 | ||
554 | static rlim_t get_fd_limit(void) | |
555 | { | |
556 | struct rlimit l; | |
557 | rlim_t limit = 0; | |
558 | ||
559 | /* Allow half of the current open fd limit. */ | |
560 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
561 | if (l.rlim_cur == RLIM_INFINITY) | |
562 | limit = l.rlim_cur; | |
563 | else | |
564 | limit = l.rlim_cur / 2; | |
565 | } else { | |
566 | pr_err("failed to get fd limit\n"); | |
567 | limit = 1; | |
568 | } | |
569 | ||
570 | return limit; | |
571 | } | |
572 | ||
f3069249 JO |
573 | static rlim_t fd_limit; |
574 | ||
575 | /* | |
576 | * Used only by tests/dso-data.c to reset the environment | |
577 | * for tests. I dont expect we should change this during | |
578 | * standard runtime. | |
579 | */ | |
580 | void reset_fd_limit(void) | |
c6580451 | 581 | { |
f3069249 JO |
582 | fd_limit = 0; |
583 | } | |
c6580451 | 584 | |
f3069249 JO |
585 | static bool may_cache_fd(void) |
586 | { | |
587 | if (!fd_limit) | |
588 | fd_limit = get_fd_limit(); | |
c6580451 | 589 | |
f3069249 | 590 | if (fd_limit == RLIM_INFINITY) |
c6580451 JO |
591 | return true; |
592 | ||
f3069249 | 593 | return fd_limit > (rlim_t) dso__data_open_cnt; |
c6580451 JO |
594 | } |
595 | ||
c1f9aa0a JO |
596 | /* |
597 | * Check and close LRU dso if we crossed allowed limit | |
598 | * for opened dso file descriptors. The limit is half | |
599 | * of the RLIMIT_NOFILE files opened. | |
600 | */ | |
c6580451 JO |
601 | static void check_data_close(void) |
602 | { | |
603 | bool cache_fd = may_cache_fd(); | |
604 | ||
605 | if (!cache_fd) | |
606 | close_first_dso(); | |
607 | } | |
608 | ||
c1f9aa0a JO |
609 | /** |
610 | * dso__data_close - Close DSO data file | |
611 | * @dso: dso object | |
612 | * | |
613 | * External interface to close @dso's data file descriptor. | |
614 | */ | |
eba5102d JO |
615 | void dso__data_close(struct dso *dso) |
616 | { | |
33bdedce | 617 | pthread_mutex_lock(&dso__data_open_lock); |
eba5102d | 618 | close_dso(dso); |
33bdedce | 619 | pthread_mutex_unlock(&dso__data_open_lock); |
eba5102d JO |
620 | } |
621 | ||
71ff824a | 622 | static void try_to_open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 623 | { |
631d34b5 | 624 | enum dso_binary_type binary_type_data[] = { |
cdd059d7 JO |
625 | DSO_BINARY_TYPE__BUILD_ID_CACHE, |
626 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
627 | DSO_BINARY_TYPE__NOT_FOUND, | |
628 | }; | |
629 | int i = 0; | |
630 | ||
53fa8eaa | 631 | if (dso->data.fd >= 0) |
71ff824a | 632 | return; |
53fa8eaa JO |
633 | |
634 | if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { | |
635 | dso->data.fd = open_dso(dso, machine); | |
c27697d6 | 636 | goto out; |
53fa8eaa | 637 | } |
cdd059d7 JO |
638 | |
639 | do { | |
5f70619d | 640 | dso->binary_type = binary_type_data[i++]; |
cdd059d7 | 641 | |
c27697d6 AH |
642 | dso->data.fd = open_dso(dso, machine); |
643 | if (dso->data.fd >= 0) | |
644 | goto out; | |
cdd059d7 | 645 | |
5f70619d | 646 | } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); |
c27697d6 AH |
647 | out: |
648 | if (dso->data.fd >= 0) | |
649 | dso->data.status = DSO_DATA_STATUS_OK; | |
650 | else | |
651 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
71ff824a NK |
652 | } |
653 | ||
654 | /** | |
4bb11d01 | 655 | * dso__data_get_fd - Get dso's data file descriptor |
71ff824a NK |
656 | * @dso: dso object |
657 | * @machine: machine object | |
658 | * | |
659 | * External interface to find dso's file, open it and | |
4bb11d01 NK |
660 | * returns file descriptor. It should be paired with |
661 | * dso__data_put_fd() if it returns non-negative value. | |
71ff824a | 662 | */ |
4bb11d01 | 663 | int dso__data_get_fd(struct dso *dso, struct machine *machine) |
71ff824a NK |
664 | { |
665 | if (dso->data.status == DSO_DATA_STATUS_ERROR) | |
666 | return -1; | |
cdd059d7 | 667 | |
4bb11d01 NK |
668 | if (pthread_mutex_lock(&dso__data_open_lock) < 0) |
669 | return -1; | |
670 | ||
71ff824a | 671 | try_to_open_dso(dso, machine); |
4bb11d01 NK |
672 | |
673 | if (dso->data.fd < 0) | |
674 | pthread_mutex_unlock(&dso__data_open_lock); | |
71ff824a | 675 | |
c27697d6 | 676 | return dso->data.fd; |
cdd059d7 JO |
677 | } |
678 | ||
4bb11d01 NK |
679 | void dso__data_put_fd(struct dso *dso __maybe_unused) |
680 | { | |
681 | pthread_mutex_unlock(&dso__data_open_lock); | |
682 | } | |
683 | ||
288be943 AH |
684 | bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) |
685 | { | |
686 | u32 flag = 1 << by; | |
687 | ||
688 | if (dso->data.status_seen & flag) | |
689 | return true; | |
690 | ||
691 | dso->data.status_seen |= flag; | |
692 | ||
693 | return false; | |
694 | } | |
695 | ||
cdd059d7 | 696 | static void |
8e67b725 | 697 | dso_cache__free(struct dso *dso) |
cdd059d7 | 698 | { |
8e67b725 | 699 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
700 | struct rb_node *next = rb_first(root); |
701 | ||
8e67b725 | 702 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
703 | while (next) { |
704 | struct dso_cache *cache; | |
705 | ||
706 | cache = rb_entry(next, struct dso_cache, rb_node); | |
707 | next = rb_next(&cache->rb_node); | |
708 | rb_erase(&cache->rb_node, root); | |
709 | free(cache); | |
710 | } | |
8e67b725 | 711 | pthread_mutex_unlock(&dso->lock); |
cdd059d7 JO |
712 | } |
713 | ||
8e67b725 | 714 | static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset) |
cdd059d7 | 715 | { |
8e67b725 | 716 | const struct rb_root *root = &dso->data.cache; |
3344996e ACM |
717 | struct rb_node * const *p = &root->rb_node; |
718 | const struct rb_node *parent = NULL; | |
cdd059d7 JO |
719 | struct dso_cache *cache; |
720 | ||
721 | while (*p != NULL) { | |
722 | u64 end; | |
723 | ||
724 | parent = *p; | |
725 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
726 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
727 | ||
728 | if (offset < cache->offset) | |
729 | p = &(*p)->rb_left; | |
730 | else if (offset >= end) | |
731 | p = &(*p)->rb_right; | |
732 | else | |
733 | return cache; | |
734 | } | |
8e67b725 | 735 | |
cdd059d7 JO |
736 | return NULL; |
737 | } | |
738 | ||
8e67b725 NK |
739 | static struct dso_cache * |
740 | dso_cache__insert(struct dso *dso, struct dso_cache *new) | |
cdd059d7 | 741 | { |
8e67b725 | 742 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
743 | struct rb_node **p = &root->rb_node; |
744 | struct rb_node *parent = NULL; | |
745 | struct dso_cache *cache; | |
746 | u64 offset = new->offset; | |
747 | ||
8e67b725 | 748 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
749 | while (*p != NULL) { |
750 | u64 end; | |
751 | ||
752 | parent = *p; | |
753 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
754 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
755 | ||
756 | if (offset < cache->offset) | |
757 | p = &(*p)->rb_left; | |
758 | else if (offset >= end) | |
759 | p = &(*p)->rb_right; | |
8e67b725 NK |
760 | else |
761 | goto out; | |
cdd059d7 JO |
762 | } |
763 | ||
764 | rb_link_node(&new->rb_node, parent, p); | |
765 | rb_insert_color(&new->rb_node, root); | |
8e67b725 NK |
766 | |
767 | cache = NULL; | |
768 | out: | |
769 | pthread_mutex_unlock(&dso->lock); | |
770 | return cache; | |
cdd059d7 JO |
771 | } |
772 | ||
773 | static ssize_t | |
774 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
775 | u8 *data, u64 size) | |
776 | { | |
777 | u64 cache_offset = offset - cache->offset; | |
778 | u64 cache_size = min(cache->size - cache_offset, size); | |
779 | ||
780 | memcpy(data, cache->data + cache_offset, cache_size); | |
781 | return cache_size; | |
782 | } | |
783 | ||
784 | static ssize_t | |
33bdedce NK |
785 | dso_cache__read(struct dso *dso, struct machine *machine, |
786 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
787 | { |
788 | struct dso_cache *cache; | |
8e67b725 | 789 | struct dso_cache *old; |
cdd059d7 | 790 | ssize_t ret; |
cdd059d7 JO |
791 | |
792 | do { | |
793 | u64 cache_offset; | |
794 | ||
cdd059d7 JO |
795 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); |
796 | if (!cache) | |
33bdedce NK |
797 | return -ENOMEM; |
798 | ||
799 | pthread_mutex_lock(&dso__data_open_lock); | |
800 | ||
801 | /* | |
802 | * dso->data.fd might be closed if other thread opened another | |
803 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
804 | */ | |
71ff824a NK |
805 | try_to_open_dso(dso, machine); |
806 | ||
33bdedce | 807 | if (dso->data.fd < 0) { |
71ff824a NK |
808 | ret = -errno; |
809 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
810 | break; | |
33bdedce | 811 | } |
cdd059d7 JO |
812 | |
813 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
cdd059d7 | 814 | |
c52686f9 | 815 | ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset); |
cdd059d7 JO |
816 | if (ret <= 0) |
817 | break; | |
818 | ||
819 | cache->offset = cache_offset; | |
820 | cache->size = ret; | |
33bdedce NK |
821 | } while (0); |
822 | ||
823 | pthread_mutex_unlock(&dso__data_open_lock); | |
824 | ||
825 | if (ret > 0) { | |
8e67b725 NK |
826 | old = dso_cache__insert(dso, cache); |
827 | if (old) { | |
828 | /* we lose the race */ | |
829 | free(cache); | |
830 | cache = old; | |
831 | } | |
cdd059d7 JO |
832 | |
833 | ret = dso_cache__memcpy(cache, offset, data, size); | |
33bdedce | 834 | } |
cdd059d7 JO |
835 | |
836 | if (ret <= 0) | |
837 | free(cache); | |
838 | ||
cdd059d7 JO |
839 | return ret; |
840 | } | |
841 | ||
33bdedce NK |
842 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, |
843 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
844 | { |
845 | struct dso_cache *cache; | |
846 | ||
8e67b725 | 847 | cache = dso_cache__find(dso, offset); |
cdd059d7 JO |
848 | if (cache) |
849 | return dso_cache__memcpy(cache, offset, data, size); | |
850 | else | |
33bdedce | 851 | return dso_cache__read(dso, machine, offset, data, size); |
cdd059d7 JO |
852 | } |
853 | ||
c1f9aa0a JO |
854 | /* |
855 | * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks | |
856 | * in the rb_tree. Any read to already cached data is served | |
857 | * by cached data. | |
858 | */ | |
33bdedce NK |
859 | static ssize_t cached_read(struct dso *dso, struct machine *machine, |
860 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
861 | { |
862 | ssize_t r = 0; | |
863 | u8 *p = data; | |
864 | ||
865 | do { | |
866 | ssize_t ret; | |
867 | ||
33bdedce | 868 | ret = dso_cache_read(dso, machine, offset, p, size); |
cdd059d7 JO |
869 | if (ret < 0) |
870 | return ret; | |
871 | ||
872 | /* Reached EOF, return what we have. */ | |
873 | if (!ret) | |
874 | break; | |
875 | ||
876 | BUG_ON(ret > size); | |
877 | ||
878 | r += ret; | |
879 | p += ret; | |
880 | offset += ret; | |
881 | size -= ret; | |
882 | ||
883 | } while (size); | |
884 | ||
885 | return r; | |
886 | } | |
887 | ||
33bdedce | 888 | static int data_file_size(struct dso *dso, struct machine *machine) |
c3fbd2a6 | 889 | { |
33bdedce | 890 | int ret = 0; |
c3fbd2a6 | 891 | struct stat st; |
6e81c74c | 892 | char sbuf[STRERR_BUFSIZE]; |
c3fbd2a6 | 893 | |
33bdedce NK |
894 | if (dso->data.file_size) |
895 | return 0; | |
896 | ||
71ff824a NK |
897 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
898 | return -1; | |
899 | ||
33bdedce NK |
900 | pthread_mutex_lock(&dso__data_open_lock); |
901 | ||
902 | /* | |
903 | * dso->data.fd might be closed if other thread opened another | |
904 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
905 | */ | |
71ff824a NK |
906 | try_to_open_dso(dso, machine); |
907 | ||
33bdedce | 908 | if (dso->data.fd < 0) { |
71ff824a NK |
909 | ret = -errno; |
910 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
911 | goto out; | |
c3fbd2a6 JO |
912 | } |
913 | ||
33bdedce NK |
914 | if (fstat(dso->data.fd, &st) < 0) { |
915 | ret = -errno; | |
916 | pr_err("dso cache fstat failed: %s\n", | |
c8b5f2c9 | 917 | str_error_r(errno, sbuf, sizeof(sbuf))); |
33bdedce NK |
918 | dso->data.status = DSO_DATA_STATUS_ERROR; |
919 | goto out; | |
920 | } | |
921 | dso->data.file_size = st.st_size; | |
922 | ||
923 | out: | |
924 | pthread_mutex_unlock(&dso__data_open_lock); | |
925 | return ret; | |
c3fbd2a6 JO |
926 | } |
927 | ||
6d363459 AH |
928 | /** |
929 | * dso__data_size - Return dso data size | |
930 | * @dso: dso object | |
931 | * @machine: machine object | |
932 | * | |
933 | * Return: dso data size | |
934 | */ | |
935 | off_t dso__data_size(struct dso *dso, struct machine *machine) | |
936 | { | |
33bdedce | 937 | if (data_file_size(dso, machine)) |
6d363459 AH |
938 | return -1; |
939 | ||
940 | /* For now just estimate dso data size is close to file size */ | |
941 | return dso->data.file_size; | |
942 | } | |
943 | ||
33bdedce NK |
944 | static ssize_t data_read_offset(struct dso *dso, struct machine *machine, |
945 | u64 offset, u8 *data, ssize_t size) | |
c3fbd2a6 | 946 | { |
33bdedce | 947 | if (data_file_size(dso, machine)) |
c3fbd2a6 JO |
948 | return -1; |
949 | ||
950 | /* Check the offset sanity. */ | |
951 | if (offset > dso->data.file_size) | |
952 | return -1; | |
953 | ||
954 | if (offset + size < offset) | |
955 | return -1; | |
956 | ||
33bdedce | 957 | return cached_read(dso, machine, offset, data, size); |
c3fbd2a6 JO |
958 | } |
959 | ||
c1f9aa0a JO |
960 | /** |
961 | * dso__data_read_offset - Read data from dso file offset | |
962 | * @dso: dso object | |
963 | * @machine: machine object | |
964 | * @offset: file offset | |
965 | * @data: buffer to store data | |
966 | * @size: size of the @data buffer | |
967 | * | |
968 | * External interface to read data from dso file offset. Open | |
969 | * dso data file and use cached_read to get the data. | |
970 | */ | |
c3fbd2a6 JO |
971 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, |
972 | u64 offset, u8 *data, ssize_t size) | |
973 | { | |
33bdedce | 974 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
c3fbd2a6 JO |
975 | return -1; |
976 | ||
33bdedce | 977 | return data_read_offset(dso, machine, offset, data, size); |
c3fbd2a6 JO |
978 | } |
979 | ||
c1f9aa0a JO |
980 | /** |
981 | * dso__data_read_addr - Read data from dso address | |
982 | * @dso: dso object | |
983 | * @machine: machine object | |
984 | * @add: virtual memory address | |
985 | * @data: buffer to store data | |
986 | * @size: size of the @data buffer | |
987 | * | |
988 | * External interface to read data from dso address. | |
989 | */ | |
cdd059d7 JO |
990 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, |
991 | struct machine *machine, u64 addr, | |
992 | u8 *data, ssize_t size) | |
993 | { | |
994 | u64 offset = map->map_ip(map, addr); | |
995 | return dso__data_read_offset(dso, machine, offset, data, size); | |
996 | } | |
997 | ||
998 | struct map *dso__new_map(const char *name) | |
999 | { | |
1000 | struct map *map = NULL; | |
1001 | struct dso *dso = dso__new(name); | |
1002 | ||
1003 | if (dso) | |
3183f8ca | 1004 | map = map__new2(0, dso); |
cdd059d7 JO |
1005 | |
1006 | return map; | |
1007 | } | |
1008 | ||
459ce518 ACM |
1009 | struct dso *machine__findnew_kernel(struct machine *machine, const char *name, |
1010 | const char *short_name, int dso_type) | |
cdd059d7 JO |
1011 | { |
1012 | /* | |
1013 | * The kernel dso could be created by build_id processing. | |
1014 | */ | |
aa7cc2ae | 1015 | struct dso *dso = machine__findnew_dso(machine, name); |
cdd059d7 JO |
1016 | |
1017 | /* | |
1018 | * We need to run this in all cases, since during the build_id | |
1019 | * processing we had no idea this was the kernel dso. | |
1020 | */ | |
1021 | if (dso != NULL) { | |
58a98c9c | 1022 | dso__set_short_name(dso, short_name, false); |
cdd059d7 JO |
1023 | dso->kernel = dso_type; |
1024 | } | |
1025 | ||
1026 | return dso; | |
1027 | } | |
1028 | ||
4598a0a6 WL |
1029 | /* |
1030 | * Find a matching entry and/or link current entry to RB tree. | |
1031 | * Either one of the dso or name parameter must be non-NULL or the | |
1032 | * function will not work. | |
1033 | */ | |
e8807844 ACM |
1034 | static struct dso *__dso__findlink_by_longname(struct rb_root *root, |
1035 | struct dso *dso, const char *name) | |
4598a0a6 WL |
1036 | { |
1037 | struct rb_node **p = &root->rb_node; | |
1038 | struct rb_node *parent = NULL; | |
1039 | ||
1040 | if (!name) | |
1041 | name = dso->long_name; | |
1042 | /* | |
1043 | * Find node with the matching name | |
1044 | */ | |
1045 | while (*p) { | |
1046 | struct dso *this = rb_entry(*p, struct dso, rb_node); | |
1047 | int rc = strcmp(name, this->long_name); | |
1048 | ||
1049 | parent = *p; | |
1050 | if (rc == 0) { | |
1051 | /* | |
1052 | * In case the new DSO is a duplicate of an existing | |
0f5e1558 | 1053 | * one, print a one-time warning & put the new entry |
4598a0a6 WL |
1054 | * at the end of the list of duplicates. |
1055 | */ | |
1056 | if (!dso || (dso == this)) | |
1057 | return this; /* Find matching dso */ | |
1058 | /* | |
1059 | * The core kernel DSOs may have duplicated long name. | |
1060 | * In this case, the short name should be different. | |
1061 | * Comparing the short names to differentiate the DSOs. | |
1062 | */ | |
1063 | rc = strcmp(dso->short_name, this->short_name); | |
1064 | if (rc == 0) { | |
1065 | pr_err("Duplicated dso name: %s\n", name); | |
1066 | return NULL; | |
1067 | } | |
1068 | } | |
1069 | if (rc < 0) | |
1070 | p = &parent->rb_left; | |
1071 | else | |
1072 | p = &parent->rb_right; | |
1073 | } | |
1074 | if (dso) { | |
1075 | /* Add new node and rebalance tree */ | |
1076 | rb_link_node(&dso->rb_node, parent, p); | |
1077 | rb_insert_color(&dso->rb_node, root); | |
e266a753 | 1078 | dso->root = root; |
4598a0a6 WL |
1079 | } |
1080 | return NULL; | |
1081 | } | |
1082 | ||
e8807844 ACM |
1083 | static inline struct dso *__dso__find_by_longname(struct rb_root *root, |
1084 | const char *name) | |
4598a0a6 | 1085 | { |
e8807844 | 1086 | return __dso__findlink_by_longname(root, NULL, name); |
4598a0a6 WL |
1087 | } |
1088 | ||
bf4414ae | 1089 | void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 | 1090 | { |
e266a753 AH |
1091 | struct rb_root *root = dso->root; |
1092 | ||
cdd059d7 JO |
1093 | if (name == NULL) |
1094 | return; | |
7e155d4d ACM |
1095 | |
1096 | if (dso->long_name_allocated) | |
bf4414ae | 1097 | free((char *)dso->long_name); |
7e155d4d | 1098 | |
e266a753 AH |
1099 | if (root) { |
1100 | rb_erase(&dso->rb_node, root); | |
1101 | /* | |
1102 | * __dso__findlink_by_longname() isn't guaranteed to add it | |
1103 | * back, so a clean removal is required here. | |
1104 | */ | |
1105 | RB_CLEAR_NODE(&dso->rb_node); | |
1106 | dso->root = NULL; | |
1107 | } | |
1108 | ||
7e155d4d ACM |
1109 | dso->long_name = name; |
1110 | dso->long_name_len = strlen(name); | |
1111 | dso->long_name_allocated = name_allocated; | |
e266a753 AH |
1112 | |
1113 | if (root) | |
1114 | __dso__findlink_by_longname(root, dso, NULL); | |
cdd059d7 JO |
1115 | } |
1116 | ||
58a98c9c | 1117 | void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
1118 | { |
1119 | if (name == NULL) | |
1120 | return; | |
58a98c9c AH |
1121 | |
1122 | if (dso->short_name_allocated) | |
1123 | free((char *)dso->short_name); | |
1124 | ||
1125 | dso->short_name = name; | |
1126 | dso->short_name_len = strlen(name); | |
1127 | dso->short_name_allocated = name_allocated; | |
cdd059d7 JO |
1128 | } |
1129 | ||
1130 | static void dso__set_basename(struct dso *dso) | |
1131 | { | |
ac5e7f84 SE |
1132 | /* |
1133 | * basename() may modify path buffer, so we must pass | |
1134 | * a copy. | |
1135 | */ | |
1136 | char *base, *lname = strdup(dso->long_name); | |
1137 | ||
1138 | if (!lname) | |
1139 | return; | |
1140 | ||
1141 | /* | |
1142 | * basename() may return a pointer to internal | |
1143 | * storage which is reused in subsequent calls | |
1144 | * so copy the result. | |
1145 | */ | |
1146 | base = strdup(basename(lname)); | |
1147 | ||
1148 | free(lname); | |
1149 | ||
1150 | if (!base) | |
1151 | return; | |
1152 | ||
1153 | dso__set_short_name(dso, base, true); | |
cdd059d7 JO |
1154 | } |
1155 | ||
1156 | int dso__name_len(const struct dso *dso) | |
1157 | { | |
1158 | if (!dso) | |
1159 | return strlen("[unknown]"); | |
bb963e16 | 1160 | if (verbose > 0) |
cdd059d7 JO |
1161 | return dso->long_name_len; |
1162 | ||
1163 | return dso->short_name_len; | |
1164 | } | |
1165 | ||
3183f8ca | 1166 | bool dso__loaded(const struct dso *dso) |
cdd059d7 | 1167 | { |
3183f8ca | 1168 | return dso->loaded; |
cdd059d7 JO |
1169 | } |
1170 | ||
3183f8ca | 1171 | bool dso__sorted_by_name(const struct dso *dso) |
cdd059d7 | 1172 | { |
3183f8ca | 1173 | return dso->sorted_by_name; |
cdd059d7 JO |
1174 | } |
1175 | ||
3183f8ca | 1176 | void dso__set_sorted_by_name(struct dso *dso) |
cdd059d7 | 1177 | { |
3183f8ca | 1178 | dso->sorted_by_name = true; |
cdd059d7 JO |
1179 | } |
1180 | ||
1181 | struct dso *dso__new(const char *name) | |
1182 | { | |
1183 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
1184 | ||
1185 | if (dso != NULL) { | |
cdd059d7 | 1186 | strcpy(dso->name, name); |
7e155d4d | 1187 | dso__set_long_name(dso, dso->name, false); |
58a98c9c | 1188 | dso__set_short_name(dso, dso->name, false); |
3183f8ca | 1189 | dso->symbols = dso->symbol_names = RB_ROOT; |
ca40e2af | 1190 | dso->data.cache = RB_ROOT; |
11ea2515 | 1191 | dso->inlined_nodes = RB_ROOT; |
21ac9d54 | 1192 | dso->srclines = RB_ROOT; |
53fa8eaa | 1193 | dso->data.fd = -1; |
c27697d6 | 1194 | dso->data.status = DSO_DATA_STATUS_UNKNOWN; |
cdd059d7 | 1195 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
5f70619d | 1196 | dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; |
c6d8f2a4 | 1197 | dso->is_64_bit = (sizeof(void *) == 8); |
cdd059d7 | 1198 | dso->loaded = 0; |
0131c4ec | 1199 | dso->rel = 0; |
cdd059d7 JO |
1200 | dso->sorted_by_name = 0; |
1201 | dso->has_build_id = 0; | |
2cc9d0ef | 1202 | dso->has_srcline = 1; |
906049c8 | 1203 | dso->a2l_fails = 1; |
cdd059d7 JO |
1204 | dso->kernel = DSO_TYPE_USER; |
1205 | dso->needs_swap = DSO_SWAP__UNSET; | |
2af52475 | 1206 | dso->comp = COMP_ID__NONE; |
4598a0a6 | 1207 | RB_CLEAR_NODE(&dso->rb_node); |
e266a753 | 1208 | dso->root = NULL; |
cdd059d7 | 1209 | INIT_LIST_HEAD(&dso->node); |
eba5102d | 1210 | INIT_LIST_HEAD(&dso->data.open_entry); |
4a936edc | 1211 | pthread_mutex_init(&dso->lock, NULL); |
7100810a | 1212 | refcount_set(&dso->refcnt, 1); |
cdd059d7 JO |
1213 | } |
1214 | ||
1215 | return dso; | |
1216 | } | |
1217 | ||
1218 | void dso__delete(struct dso *dso) | |
1219 | { | |
4598a0a6 WL |
1220 | if (!RB_EMPTY_NODE(&dso->rb_node)) |
1221 | pr_err("DSO %s is still in rbtree when being deleted!\n", | |
1222 | dso->long_name); | |
11ea2515 MW |
1223 | |
1224 | /* free inlines first, as they reference symbols */ | |
1225 | inlines__tree_delete(&dso->inlined_nodes); | |
21ac9d54 | 1226 | srcline__tree_delete(&dso->srclines); |
3183f8ca | 1227 | symbols__delete(&dso->symbols); |
ee021d42 ACM |
1228 | |
1229 | if (dso->short_name_allocated) { | |
04662523 | 1230 | zfree((char **)&dso->short_name); |
ee021d42 ACM |
1231 | dso->short_name_allocated = false; |
1232 | } | |
1233 | ||
1234 | if (dso->long_name_allocated) { | |
04662523 | 1235 | zfree((char **)&dso->long_name); |
ee021d42 ACM |
1236 | dso->long_name_allocated = false; |
1237 | } | |
1238 | ||
53fa8eaa | 1239 | dso__data_close(dso); |
cfe9174f | 1240 | auxtrace_cache__free(dso->auxtrace_cache); |
8e67b725 | 1241 | dso_cache__free(dso); |
454ff00f | 1242 | dso__free_a2l(dso); |
04662523 | 1243 | zfree(&dso->symsrc_filename); |
843ff37b | 1244 | nsinfo__zput(dso->nsinfo); |
4a936edc | 1245 | pthread_mutex_destroy(&dso->lock); |
cdd059d7 JO |
1246 | free(dso); |
1247 | } | |
1248 | ||
d3a7c489 ACM |
1249 | struct dso *dso__get(struct dso *dso) |
1250 | { | |
1251 | if (dso) | |
7100810a | 1252 | refcount_inc(&dso->refcnt); |
d3a7c489 ACM |
1253 | return dso; |
1254 | } | |
1255 | ||
1256 | void dso__put(struct dso *dso) | |
1257 | { | |
7100810a | 1258 | if (dso && refcount_dec_and_test(&dso->refcnt)) |
d3a7c489 ACM |
1259 | dso__delete(dso); |
1260 | } | |
1261 | ||
cdd059d7 JO |
1262 | void dso__set_build_id(struct dso *dso, void *build_id) |
1263 | { | |
1264 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
1265 | dso->has_build_id = 1; | |
1266 | } | |
1267 | ||
1268 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
1269 | { | |
1270 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
1271 | } | |
1272 | ||
1273 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
1274 | { | |
1275 | char path[PATH_MAX]; | |
1276 | ||
1277 | if (machine__is_default_guest(machine)) | |
1278 | return; | |
1279 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
1280 | if (sysfs__read_build_id(path, dso->build_id, | |
1281 | sizeof(dso->build_id)) == 0) | |
1282 | dso->has_build_id = true; | |
1283 | } | |
1284 | ||
1285 | int dso__kernel_module_get_build_id(struct dso *dso, | |
1286 | const char *root_dir) | |
1287 | { | |
1288 | char filename[PATH_MAX]; | |
1289 | /* | |
1290 | * kernel module short names are of the form "[module]" and | |
1291 | * we need just "module" here. | |
1292 | */ | |
1293 | const char *name = dso->short_name + 1; | |
1294 | ||
1295 | snprintf(filename, sizeof(filename), | |
1296 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
1297 | root_dir, (int)strlen(name) - 1, name); | |
1298 | ||
1299 | if (sysfs__read_build_id(filename, dso->build_id, | |
1300 | sizeof(dso->build_id)) == 0) | |
1301 | dso->has_build_id = true; | |
1302 | ||
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
1307 | { | |
1308 | bool have_build_id = false; | |
1309 | struct dso *pos; | |
f045b8c4 | 1310 | struct nscookie nsc; |
cdd059d7 JO |
1311 | |
1312 | list_for_each_entry(pos, head, node) { | |
6ae98ba6 | 1313 | if (with_hits && !pos->hit && !dso__is_vdso(pos)) |
cdd059d7 JO |
1314 | continue; |
1315 | if (pos->has_build_id) { | |
1316 | have_build_id = true; | |
1317 | continue; | |
1318 | } | |
f045b8c4 | 1319 | nsinfo__mountns_enter(pos->nsinfo, &nsc); |
cdd059d7 JO |
1320 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1321 | sizeof(pos->build_id)) > 0) { | |
1322 | have_build_id = true; | |
1323 | pos->has_build_id = true; | |
1324 | } | |
f045b8c4 | 1325 | nsinfo__mountns_exit(&nsc); |
cdd059d7 JO |
1326 | } |
1327 | ||
1328 | return have_build_id; | |
1329 | } | |
1330 | ||
e8807844 | 1331 | void __dsos__add(struct dsos *dsos, struct dso *dso) |
cdd059d7 | 1332 | { |
8fa7d87f | 1333 | list_add_tail(&dso->node, &dsos->head); |
e8807844 | 1334 | __dso__findlink_by_longname(&dsos->root, dso, NULL); |
d3a7c489 ACM |
1335 | /* |
1336 | * It is now in the linked list, grab a reference, then garbage collect | |
1337 | * this when needing memory, by looking at LRU dso instances in the | |
1338 | * list with atomic_read(&dso->refcnt) == 1, i.e. no references | |
1339 | * anywhere besides the one for the list, do, under a lock for the | |
1340 | * list: remove it from the list, then a dso__put(), that probably will | |
1341 | * be the last and will then call dso__delete(), end of life. | |
1342 | * | |
1343 | * That, or at the end of the 'struct machine' lifetime, when all | |
1344 | * 'struct dso' instances will be removed from the list, in | |
1345 | * dsos__exit(), if they have no other reference from some other data | |
1346 | * structure. | |
1347 | * | |
1348 | * E.g.: after processing a 'perf.data' file and storing references | |
1349 | * to objects instantiated while processing events, we will have | |
1350 | * references to the 'thread', 'map', 'dso' structs all from 'struct | |
1351 | * hist_entry' instances, but we may not need anything not referenced, | |
1352 | * so we might as well call machines__exit()/machines__delete() and | |
1353 | * garbage collect it. | |
1354 | */ | |
1355 | dso__get(dso); | |
e8807844 ACM |
1356 | } |
1357 | ||
1358 | void dsos__add(struct dsos *dsos, struct dso *dso) | |
1359 | { | |
0a7c74ea | 1360 | down_write(&dsos->lock); |
e8807844 | 1361 | __dsos__add(dsos, dso); |
0a7c74ea | 1362 | up_write(&dsos->lock); |
cdd059d7 JO |
1363 | } |
1364 | ||
e8807844 | 1365 | struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
cdd059d7 JO |
1366 | { |
1367 | struct dso *pos; | |
1368 | ||
f9ceffb6 | 1369 | if (cmp_short) { |
8fa7d87f | 1370 | list_for_each_entry(pos, &dsos->head, node) |
f9ceffb6 WL |
1371 | if (strcmp(pos->short_name, name) == 0) |
1372 | return pos; | |
1373 | return NULL; | |
1374 | } | |
e8807844 | 1375 | return __dso__find_by_longname(&dsos->root, name); |
cdd059d7 JO |
1376 | } |
1377 | ||
e8807844 ACM |
1378 | struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
1379 | { | |
1380 | struct dso *dso; | |
0a7c74ea | 1381 | down_read(&dsos->lock); |
e8807844 | 1382 | dso = __dsos__find(dsos, name, cmp_short); |
0a7c74ea | 1383 | up_read(&dsos->lock); |
e8807844 ACM |
1384 | return dso; |
1385 | } | |
1386 | ||
1387 | struct dso *__dsos__addnew(struct dsos *dsos, const char *name) | |
cdd059d7 | 1388 | { |
701d8d7f | 1389 | struct dso *dso = dso__new(name); |
cdd059d7 | 1390 | |
701d8d7f | 1391 | if (dso != NULL) { |
e8807844 | 1392 | __dsos__add(dsos, dso); |
701d8d7f | 1393 | dso__set_basename(dso); |
82de26ab MH |
1394 | /* Put dso here because __dsos_add already got it */ |
1395 | dso__put(dso); | |
cdd059d7 | 1396 | } |
cdd059d7 JO |
1397 | return dso; |
1398 | } | |
1399 | ||
701d8d7f JO |
1400 | struct dso *__dsos__findnew(struct dsos *dsos, const char *name) |
1401 | { | |
e8807844 ACM |
1402 | struct dso *dso = __dsos__find(dsos, name, false); |
1403 | ||
1404 | return dso ? dso : __dsos__addnew(dsos, name); | |
1405 | } | |
701d8d7f | 1406 | |
e8807844 ACM |
1407 | struct dso *dsos__findnew(struct dsos *dsos, const char *name) |
1408 | { | |
1409 | struct dso *dso; | |
0a7c74ea | 1410 | down_write(&dsos->lock); |
d3a7c489 | 1411 | dso = dso__get(__dsos__findnew(dsos, name)); |
0a7c74ea | 1412 | up_write(&dsos->lock); |
e8807844 | 1413 | return dso; |
701d8d7f JO |
1414 | } |
1415 | ||
cdd059d7 | 1416 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
417c2ff6 | 1417 | bool (skip)(struct dso *dso, int parm), int parm) |
cdd059d7 JO |
1418 | { |
1419 | struct dso *pos; | |
1420 | size_t ret = 0; | |
1421 | ||
1422 | list_for_each_entry(pos, head, node) { | |
417c2ff6 | 1423 | if (skip && skip(pos, parm)) |
cdd059d7 JO |
1424 | continue; |
1425 | ret += dso__fprintf_buildid(pos, fp); | |
1426 | ret += fprintf(fp, " %s\n", pos->long_name); | |
1427 | } | |
1428 | return ret; | |
1429 | } | |
1430 | ||
1431 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
1432 | { | |
1433 | struct dso *pos; | |
1434 | size_t ret = 0; | |
1435 | ||
1436 | list_for_each_entry(pos, head, node) { | |
3183f8ca | 1437 | ret += dso__fprintf(pos, fp); |
cdd059d7 JO |
1438 | } |
1439 | ||
1440 | return ret; | |
1441 | } | |
1442 | ||
1443 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
1444 | { | |
b5d8bbe8 | 1445 | char sbuild_id[SBUILD_ID_SIZE]; |
cdd059d7 JO |
1446 | |
1447 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1448 | return fprintf(fp, "%s", sbuild_id); | |
1449 | } | |
1450 | ||
3183f8ca | 1451 | size_t dso__fprintf(struct dso *dso, FILE *fp) |
cdd059d7 JO |
1452 | { |
1453 | struct rb_node *nd; | |
1454 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
1455 | ||
1456 | if (dso->short_name != dso->long_name) | |
1457 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3183f8ca | 1458 | ret += fprintf(fp, "%sloaded, ", dso__loaded(dso) ? "" : "NOT "); |
cdd059d7 JO |
1459 | ret += dso__fprintf_buildid(dso, fp); |
1460 | ret += fprintf(fp, ")\n"); | |
3183f8ca | 1461 | for (nd = rb_first(&dso->symbols); nd; nd = rb_next(nd)) { |
cdd059d7 JO |
1462 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
1463 | ret += symbol__fprintf(pos, fp); | |
1464 | } | |
1465 | ||
1466 | return ret; | |
1467 | } | |
2b5b8bb2 AH |
1468 | |
1469 | enum dso_type dso__type(struct dso *dso, struct machine *machine) | |
1470 | { | |
1471 | int fd; | |
4bb11d01 | 1472 | enum dso_type type = DSO__TYPE_UNKNOWN; |
2b5b8bb2 | 1473 | |
4bb11d01 NK |
1474 | fd = dso__data_get_fd(dso, machine); |
1475 | if (fd >= 0) { | |
1476 | type = dso__type_fd(fd); | |
1477 | dso__data_put_fd(dso); | |
1478 | } | |
2b5b8bb2 | 1479 | |
4bb11d01 | 1480 | return type; |
2b5b8bb2 | 1481 | } |
18425f13 ACM |
1482 | |
1483 | int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) | |
1484 | { | |
1485 | int idx, errnum = dso->load_errno; | |
1486 | /* | |
1487 | * This must have a same ordering as the enum dso_load_errno. | |
1488 | */ | |
1489 | static const char *dso_load__error_str[] = { | |
1490 | "Internal tools/perf/ library error", | |
1491 | "Invalid ELF file", | |
1492 | "Can not read build id", | |
1493 | "Mismatching build id", | |
1494 | "Decompression failure", | |
1495 | }; | |
1496 | ||
1497 | BUG_ON(buflen == 0); | |
1498 | ||
1499 | if (errnum >= 0) { | |
c8b5f2c9 | 1500 | const char *err = str_error_r(errnum, buf, buflen); |
18425f13 ACM |
1501 | |
1502 | if (err != buf) | |
1503 | scnprintf(buf, buflen, "%s", err); | |
1504 | ||
1505 | return 0; | |
1506 | } | |
1507 | ||
1508 | if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END) | |
1509 | return -1; | |
1510 | ||
1511 | idx = errnum - __DSO_LOAD_ERRNO__START; | |
1512 | scnprintf(buf, buflen, "%s", dso_load__error_str[idx]); | |
1513 | return 0; | |
1514 | } |