Commit | Line | Data |
---|---|---|
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> |
68c0188e | 11 | #include <libgen.h> |
611f0afe | 12 | #include "compress.h" |
40f3b2d2 | 13 | #include "namespaces.h" |
9a3993d4 | 14 | #include "path.h" |
cdd059d7 | 15 | #include "symbol.h" |
11ea2515 | 16 | #include "srcline.h" |
cdd059d7 | 17 | #include "dso.h" |
69d2591a | 18 | #include "machine.h" |
cfe9174f | 19 | #include "auxtrace.h" |
cdd059d7 JO |
20 | #include "util.h" |
21 | #include "debug.h" | |
a067558e | 22 | #include "string2.h" |
6ae98ba6 | 23 | #include "vdso.h" |
cdd059d7 | 24 | |
9343e45b MGP |
25 | static const char * const debuglink_paths[] = { |
26 | "%.0s%s", | |
27 | "%s/%s", | |
28 | "%s/.debug/%s", | |
29 | "/usr/lib/debug%s/%s" | |
30 | }; | |
31 | ||
cdd059d7 JO |
32 | char dso__symtab_origin(const struct dso *dso) |
33 | { | |
34 | static const char origin[] = { | |
9cd00941 RRD |
35 | [DSO_BINARY_TYPE__KALLSYMS] = 'k', |
36 | [DSO_BINARY_TYPE__VMLINUX] = 'v', | |
37 | [DSO_BINARY_TYPE__JAVA_JIT] = 'j', | |
38 | [DSO_BINARY_TYPE__DEBUGLINK] = 'l', | |
39 | [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B', | |
d2396999 | 40 | [DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO] = 'D', |
9cd00941 RRD |
41 | [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', |
42 | [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', | |
43 | [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', | |
44 | [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', | |
45 | [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', | |
46 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K', | |
c00c48fc | 47 | [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm', |
9cd00941 RRD |
48 | [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g', |
49 | [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', | |
c00c48fc | 50 | [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', |
9cd00941 | 51 | [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', |
cdd059d7 JO |
52 | }; |
53 | ||
54 | if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) | |
55 | return '!'; | |
56 | return origin[dso->symtab_type]; | |
57 | } | |
58 | ||
ee4e9625 ACM |
59 | int dso__read_binary_type_filename(const struct dso *dso, |
60 | enum dso_binary_type type, | |
61 | char *root_dir, char *filename, size_t size) | |
cdd059d7 | 62 | { |
b5d8bbe8 | 63 | char build_id_hex[SBUILD_ID_SIZE]; |
cdd059d7 | 64 | int ret = 0; |
972f393b | 65 | size_t len; |
cdd059d7 JO |
66 | |
67 | switch (type) { | |
9343e45b MGP |
68 | case DSO_BINARY_TYPE__DEBUGLINK: |
69 | { | |
70 | const char *last_slash; | |
71 | char dso_dir[PATH_MAX]; | |
72 | char symfile[PATH_MAX]; | |
73 | unsigned int i; | |
cdd059d7 | 74 | |
dc6254cf | 75 | len = __symbol__join_symfs(filename, size, dso->long_name); |
9343e45b MGP |
76 | last_slash = filename + len; |
77 | while (last_slash != filename && *last_slash != '/') | |
78 | last_slash--; | |
40356721 | 79 | |
9343e45b MGP |
80 | strncpy(dso_dir, filename, last_slash - filename); |
81 | dso_dir[last_slash-filename] = '\0'; | |
82 | ||
83 | if (!is_regular_file(filename)) { | |
84 | ret = -1; | |
40356721 | 85 | break; |
9343e45b | 86 | } |
40356721 | 87 | |
9343e45b MGP |
88 | ret = filename__read_debuglink(filename, symfile, PATH_MAX); |
89 | if (ret) | |
90 | break; | |
91 | ||
92 | /* Check predefined locations where debug file might reside */ | |
93 | ret = -1; | |
94 | for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) { | |
95 | snprintf(filename, size, | |
96 | debuglink_paths[i], dso_dir, symfile); | |
97 | if (is_regular_file(filename)) { | |
98 | ret = 0; | |
99 | break; | |
100 | } | |
cdd059d7 | 101 | } |
9343e45b | 102 | |
cdd059d7 | 103 | break; |
9343e45b | 104 | } |
cdd059d7 | 105 | case DSO_BINARY_TYPE__BUILD_ID_CACHE: |
d2396999 KJ |
106 | if (dso__build_id_filename(dso, filename, size, false) == NULL) |
107 | ret = -1; | |
108 | break; | |
109 | ||
110 | case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: | |
111 | if (dso__build_id_filename(dso, filename, size, true) == NULL) | |
cdd059d7 JO |
112 | ret = -1; |
113 | break; | |
114 | ||
115 | case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: | |
972f393b ACM |
116 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
117 | snprintf(filename + len, size - len, "%s.debug", dso->long_name); | |
cdd059d7 JO |
118 | break; |
119 | ||
120 | case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: | |
972f393b ACM |
121 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); |
122 | snprintf(filename + len, size - len, "%s", dso->long_name); | |
cdd059d7 JO |
123 | break; |
124 | ||
9cd00941 RRD |
125 | case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: |
126 | { | |
bf4414ae | 127 | const char *last_slash; |
9cd00941 RRD |
128 | size_t dir_size; |
129 | ||
130 | last_slash = dso->long_name + dso->long_name_len; | |
131 | while (last_slash != dso->long_name && *last_slash != '/') | |
132 | last_slash--; | |
133 | ||
972f393b | 134 | len = __symbol__join_symfs(filename, size, ""); |
9cd00941 RRD |
135 | dir_size = last_slash - dso->long_name + 2; |
136 | if (dir_size > (size - len)) { | |
137 | ret = -1; | |
138 | break; | |
139 | } | |
7d2a5122 ACM |
140 | len += scnprintf(filename + len, dir_size, "%s", dso->long_name); |
141 | len += scnprintf(filename + len , size - len, ".debug%s", | |
9cd00941 RRD |
142 | last_slash); |
143 | break; | |
144 | } | |
145 | ||
cdd059d7 JO |
146 | case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: |
147 | if (!dso->has_build_id) { | |
148 | ret = -1; | |
149 | break; | |
150 | } | |
151 | ||
152 | build_id__sprintf(dso->build_id, | |
153 | sizeof(dso->build_id), | |
154 | build_id_hex); | |
972f393b ACM |
155 | len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); |
156 | snprintf(filename + len, size - len, "%.2s/%s.debug", | |
157 | build_id_hex, build_id_hex + 2); | |
cdd059d7 JO |
158 | break; |
159 | ||
39b12f78 AH |
160 | case DSO_BINARY_TYPE__VMLINUX: |
161 | case DSO_BINARY_TYPE__GUEST_VMLINUX: | |
cdd059d7 | 162 | case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: |
972f393b | 163 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
164 | break; |
165 | ||
166 | case DSO_BINARY_TYPE__GUEST_KMODULE: | |
c00c48fc | 167 | case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: |
972f393b ACM |
168 | path__join3(filename, size, symbol_conf.symfs, |
169 | root_dir, dso->long_name); | |
cdd059d7 JO |
170 | break; |
171 | ||
172 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: | |
c00c48fc | 173 | case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: |
972f393b | 174 | __symbol__join_symfs(filename, size, dso->long_name); |
cdd059d7 JO |
175 | break; |
176 | ||
8e0cf965 AH |
177 | case DSO_BINARY_TYPE__KCORE: |
178 | case DSO_BINARY_TYPE__GUEST_KCORE: | |
7d2a5122 | 179 | snprintf(filename, size, "%s", dso->long_name); |
8e0cf965 AH |
180 | break; |
181 | ||
cdd059d7 JO |
182 | default: |
183 | case DSO_BINARY_TYPE__KALLSYMS: | |
cdd059d7 | 184 | case DSO_BINARY_TYPE__GUEST_KALLSYMS: |
cdd059d7 JO |
185 | case DSO_BINARY_TYPE__JAVA_JIT: |
186 | case DSO_BINARY_TYPE__NOT_FOUND: | |
187 | ret = -1; | |
188 | break; | |
189 | } | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
4b838b0d JO |
194 | enum { |
195 | COMP_ID__NONE = 0, | |
196 | }; | |
197 | ||
c00c48fc NK |
198 | static const struct { |
199 | const char *fmt; | |
200 | int (*decompress)(const char *input, int output); | |
8b42b7e5 | 201 | bool (*is_compressed)(const char *input); |
c00c48fc | 202 | } compressions[] = { |
4b838b0d | 203 | [COMP_ID__NONE] = { .fmt = NULL, }, |
e92ce12e | 204 | #ifdef HAVE_ZLIB_SUPPORT |
8b42b7e5 | 205 | { "gz", gzip_decompress_to_file, gzip_is_compressed }, |
80a32e5b JO |
206 | #endif |
207 | #ifdef HAVE_LZMA_SUPPORT | |
8b42b7e5 | 208 | { "xz", lzma_decompress_to_file, lzma_is_compressed }, |
e92ce12e | 209 | #endif |
8b42b7e5 | 210 | { NULL, NULL, NULL }, |
c00c48fc NK |
211 | }; |
212 | ||
4b838b0d | 213 | static int is_supported_compression(const char *ext) |
c00c48fc NK |
214 | { |
215 | unsigned i; | |
216 | ||
4b838b0d | 217 | for (i = 1; compressions[i].fmt; i++) { |
c00c48fc | 218 | if (!strcmp(ext, compressions[i].fmt)) |
4b838b0d | 219 | return i; |
c00c48fc | 220 | } |
4b838b0d | 221 | return COMP_ID__NONE; |
c00c48fc NK |
222 | } |
223 | ||
1f121b03 | 224 | bool is_kernel_module(const char *pathname, int cpumode) |
c00c48fc | 225 | { |
8dee9ff1 | 226 | struct kmod_path m; |
1f121b03 WN |
227 | int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK; |
228 | ||
229 | WARN_ONCE(mode != cpumode, | |
230 | "Internal error: passing unmasked cpumode (%x) to is_kernel_module", | |
231 | cpumode); | |
232 | ||
233 | switch (mode) { | |
234 | case PERF_RECORD_MISC_USER: | |
235 | case PERF_RECORD_MISC_HYPERVISOR: | |
236 | case PERF_RECORD_MISC_GUEST_USER: | |
237 | return false; | |
238 | /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */ | |
239 | default: | |
240 | if (kmod_path__parse(&m, pathname)) { | |
241 | pr_err("Failed to check whether %s is a kernel module or not. Assume it is.", | |
242 | pathname); | |
243 | return true; | |
244 | } | |
245 | } | |
c00c48fc | 246 | |
8dee9ff1 | 247 | return m.kmod; |
c00c48fc NK |
248 | } |
249 | ||
c00c48fc NK |
250 | bool dso__needs_decompress(struct dso *dso) |
251 | { | |
252 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || | |
253 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; | |
254 | } | |
255 | ||
c9a8a613 JO |
256 | static int decompress_kmodule(struct dso *dso, const char *name, |
257 | char *pathname, size_t len) | |
42b3fa67 | 258 | { |
c9a8a613 | 259 | char tmpbuf[] = KMOD_DECOMP_NAME; |
42b3fa67 | 260 | int fd = -1; |
42b3fa67 NK |
261 | |
262 | if (!dso__needs_decompress(dso)) | |
263 | return -1; | |
264 | ||
dde755a9 | 265 | if (dso->comp == COMP_ID__NONE) |
42b3fa67 NK |
266 | return -1; |
267 | ||
8b42b7e5 JO |
268 | /* |
269 | * We have proper compression id for DSO and yet the file | |
270 | * behind the 'name' can still be plain uncompressed object. | |
271 | * | |
272 | * The reason is behind the logic we open the DSO object files, | |
273 | * when we try all possible 'debug' objects until we find the | |
274 | * data. So even if the DSO is represented by 'krava.xz' module, | |
275 | * we can end up here opening ~/.debug/....23432432/debug' file | |
276 | * which is not compressed. | |
277 | * | |
278 | * To keep this transparent, we detect this and return the file | |
279 | * descriptor to the uncompressed file. | |
280 | */ | |
281 | if (!compressions[dso->comp].is_compressed(name)) | |
282 | return open(name, O_RDONLY); | |
283 | ||
42b3fa67 NK |
284 | fd = mkstemp(tmpbuf); |
285 | if (fd < 0) { | |
286 | dso->load_errno = errno; | |
dde755a9 | 287 | return -1; |
42b3fa67 NK |
288 | } |
289 | ||
dde755a9 | 290 | if (compressions[dso->comp].decompress(name, fd)) { |
42b3fa67 NK |
291 | dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE; |
292 | close(fd); | |
293 | fd = -1; | |
294 | } | |
295 | ||
c9a8a613 JO |
296 | if (!pathname || (fd < 0)) |
297 | unlink(tmpbuf); | |
298 | ||
299 | if (pathname && (fd >= 0)) | |
fca5085c | 300 | strlcpy(pathname, tmpbuf, len); |
c9a8a613 | 301 | |
42b3fa67 NK |
302 | return fd; |
303 | } | |
304 | ||
305 | int dso__decompress_kmodule_fd(struct dso *dso, const char *name) | |
306 | { | |
c9a8a613 | 307 | return decompress_kmodule(dso, name, NULL, 0); |
42b3fa67 NK |
308 | } |
309 | ||
310 | int dso__decompress_kmodule_path(struct dso *dso, const char *name, | |
311 | char *pathname, size_t len) | |
312 | { | |
c9a8a613 | 313 | int fd = decompress_kmodule(dso, name, pathname, len); |
42b3fa67 | 314 | |
42b3fa67 | 315 | close(fd); |
c9a8a613 | 316 | return fd >= 0 ? 0 : -1; |
42b3fa67 NK |
317 | } |
318 | ||
3c8a67f5 JO |
319 | /* |
320 | * Parses kernel module specified in @path and updates | |
321 | * @m argument like: | |
322 | * | |
323 | * @comp - true if @path contains supported compression suffix, | |
324 | * false otherwise | |
325 | * @kmod - true if @path contains '.ko' suffix in right position, | |
326 | * false otherwise | |
327 | * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name | |
328 | * of the kernel module without suffixes, otherwise strudup-ed | |
329 | * base name of @path | |
330 | * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string | |
331 | * the compression suffix | |
332 | * | |
333 | * Returns 0 if there's no strdup error, -ENOMEM otherwise. | |
334 | */ | |
335 | int __kmod_path__parse(struct kmod_path *m, const char *path, | |
b946cd37 | 336 | bool alloc_name) |
3c8a67f5 JO |
337 | { |
338 | const char *name = strrchr(path, '/'); | |
339 | const char *ext = strrchr(path, '.'); | |
1f121b03 | 340 | bool is_simple_name = false; |
3c8a67f5 JO |
341 | |
342 | memset(m, 0x0, sizeof(*m)); | |
343 | name = name ? name + 1 : path; | |
344 | ||
1f121b03 WN |
345 | /* |
346 | * '.' is also a valid character for module name. For example: | |
347 | * [aaa.bbb] is a valid module name. '[' should have higher | |
348 | * priority than '.ko' suffix. | |
349 | * | |
350 | * The kernel names are from machine__mmap_name. Such | |
351 | * name should belong to kernel itself, not kernel module. | |
352 | */ | |
353 | if (name[0] == '[') { | |
354 | is_simple_name = true; | |
355 | if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) || | |
356 | (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) || | |
357 | (strncmp(name, "[vdso]", 6) == 0) || | |
aef4feac AH |
358 | (strncmp(name, "[vdso32]", 8) == 0) || |
359 | (strncmp(name, "[vdsox32]", 9) == 0) || | |
1f121b03 WN |
360 | (strncmp(name, "[vsyscall]", 10) == 0)) { |
361 | m->kmod = false; | |
362 | ||
363 | } else | |
364 | m->kmod = true; | |
365 | } | |
366 | ||
3c8a67f5 | 367 | /* No extension, just return name. */ |
1f121b03 | 368 | if ((ext == NULL) || is_simple_name) { |
3c8a67f5 JO |
369 | if (alloc_name) { |
370 | m->name = strdup(name); | |
371 | return m->name ? 0 : -ENOMEM; | |
372 | } | |
373 | return 0; | |
374 | } | |
375 | ||
4b838b0d JO |
376 | m->comp = is_supported_compression(ext + 1); |
377 | if (m->comp > COMP_ID__NONE) | |
3c8a67f5 | 378 | ext -= 3; |
3c8a67f5 JO |
379 | |
380 | /* Check .ko extension only if there's enough name left. */ | |
381 | if (ext > name) | |
382 | m->kmod = !strncmp(ext, ".ko", 3); | |
383 | ||
384 | if (alloc_name) { | |
385 | if (m->kmod) { | |
386 | if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1) | |
387 | return -ENOMEM; | |
388 | } else { | |
389 | if (asprintf(&m->name, "%s", name) == -1) | |
390 | return -ENOMEM; | |
391 | } | |
392 | ||
393 | strxfrchar(m->name, '-', '_'); | |
394 | } | |
395 | ||
3c8a67f5 JO |
396 | return 0; |
397 | } | |
398 | ||
6b335e8f NK |
399 | void dso__set_module_info(struct dso *dso, struct kmod_path *m, |
400 | struct machine *machine) | |
401 | { | |
402 | if (machine__is_host(machine)) | |
403 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
404 | else | |
405 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
406 | ||
407 | /* _KMODULE_COMP should be next to _KMODULE */ | |
2af52475 | 408 | if (m->kmod && m->comp) { |
6b335e8f | 409 | dso->symtab_type++; |
2af52475 JO |
410 | dso->comp = m->comp; |
411 | } | |
6b335e8f NK |
412 | |
413 | dso__set_short_name(dso, strdup(m->name), true); | |
414 | } | |
415 | ||
eba5102d | 416 | /* |
bda6ee4a | 417 | * Global list of open DSOs and the counter. |
eba5102d JO |
418 | */ |
419 | static LIST_HEAD(dso__data_open); | |
bda6ee4a | 420 | static long dso__data_open_cnt; |
33bdedce | 421 | static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER; |
eba5102d JO |
422 | |
423 | static void dso__list_add(struct dso *dso) | |
424 | { | |
425 | list_add_tail(&dso->data.open_entry, &dso__data_open); | |
bda6ee4a | 426 | dso__data_open_cnt++; |
eba5102d JO |
427 | } |
428 | ||
429 | static void dso__list_del(struct dso *dso) | |
430 | { | |
431 | list_del(&dso->data.open_entry); | |
bda6ee4a JO |
432 | WARN_ONCE(dso__data_open_cnt <= 0, |
433 | "DSO data fd counter out of bounds."); | |
434 | dso__data_open_cnt--; | |
eba5102d JO |
435 | } |
436 | ||
a08cae03 JO |
437 | static void close_first_dso(void); |
438 | ||
439 | static int do_open(char *name) | |
440 | { | |
441 | int fd; | |
6e81c74c | 442 | char sbuf[STRERR_BUFSIZE]; |
a08cae03 JO |
443 | |
444 | do { | |
4c0d8d27 | 445 | fd = open(name, O_RDONLY|O_CLOEXEC); |
a08cae03 JO |
446 | if (fd >= 0) |
447 | return fd; | |
448 | ||
a3c0cc2a | 449 | pr_debug("dso open failed: %s\n", |
c8b5f2c9 | 450 | str_error_r(errno, sbuf, sizeof(sbuf))); |
a08cae03 JO |
451 | if (!dso__data_open_cnt || errno != EMFILE) |
452 | break; | |
453 | ||
454 | close_first_dso(); | |
455 | } while (1); | |
456 | ||
457 | return -1; | |
458 | } | |
459 | ||
eba5102d | 460 | static int __open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 461 | { |
8ba29adf | 462 | int fd = -EINVAL; |
ee4e9625 ACM |
463 | char *root_dir = (char *)""; |
464 | char *name = malloc(PATH_MAX); | |
d68a29c2 | 465 | bool decomp = false; |
cdd059d7 | 466 | |
cdd059d7 JO |
467 | if (!name) |
468 | return -ENOMEM; | |
469 | ||
470 | if (machine) | |
471 | root_dir = machine->root_dir; | |
472 | ||
5f70619d | 473 | if (dso__read_binary_type_filename(dso, dso->binary_type, |
8ba29adf NK |
474 | root_dir, name, PATH_MAX)) |
475 | goto out; | |
cdd059d7 | 476 | |
8ba29adf NK |
477 | if (!is_regular_file(name)) |
478 | goto out; | |
3c028a0c | 479 | |
1d6b3c9b NK |
480 | if (dso__needs_decompress(dso)) { |
481 | char newpath[KMOD_DECOMP_LEN]; | |
482 | size_t len = sizeof(newpath); | |
483 | ||
484 | if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) { | |
8ba29adf NK |
485 | fd = -dso->load_errno; |
486 | goto out; | |
1d6b3c9b NK |
487 | } |
488 | ||
d68a29c2 | 489 | decomp = true; |
1d6b3c9b NK |
490 | strcpy(name, newpath); |
491 | } | |
492 | ||
a08cae03 | 493 | fd = do_open(name); |
1d6b3c9b | 494 | |
d68a29c2 | 495 | if (decomp) |
1d6b3c9b NK |
496 | unlink(name); |
497 | ||
8ba29adf | 498 | out: |
cdd059d7 JO |
499 | free(name); |
500 | return fd; | |
501 | } | |
502 | ||
c6580451 JO |
503 | static void check_data_close(void); |
504 | ||
c1f9aa0a JO |
505 | /** |
506 | * dso_close - Open DSO data file | |
507 | * @dso: dso object | |
508 | * | |
509 | * Open @dso's data file descriptor and updates | |
510 | * list/count of open DSO objects. | |
511 | */ | |
eba5102d JO |
512 | static int open_dso(struct dso *dso, struct machine *machine) |
513 | { | |
f045b8c4 KJ |
514 | int fd; |
515 | struct nscookie nsc; | |
516 | ||
517 | if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) | |
518 | nsinfo__mountns_enter(dso->nsinfo, &nsc); | |
519 | fd = __open_dso(dso, machine); | |
520 | if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) | |
521 | nsinfo__mountns_exit(&nsc); | |
eba5102d | 522 | |
a6f6ae99 | 523 | if (fd >= 0) { |
eba5102d | 524 | dso__list_add(dso); |
c6580451 JO |
525 | /* |
526 | * Check if we crossed the allowed number | |
527 | * of opened DSOs and close one if needed. | |
528 | */ | |
529 | check_data_close(); | |
530 | } | |
eba5102d JO |
531 | |
532 | return fd; | |
533 | } | |
534 | ||
535 | static void close_data_fd(struct dso *dso) | |
53fa8eaa JO |
536 | { |
537 | if (dso->data.fd >= 0) { | |
538 | close(dso->data.fd); | |
539 | dso->data.fd = -1; | |
c3fbd2a6 | 540 | dso->data.file_size = 0; |
eba5102d | 541 | dso__list_del(dso); |
53fa8eaa JO |
542 | } |
543 | } | |
544 | ||
c1f9aa0a JO |
545 | /** |
546 | * dso_close - Close DSO data file | |
547 | * @dso: dso object | |
548 | * | |
549 | * Close @dso's data file descriptor and updates | |
550 | * list/count of open DSO objects. | |
551 | */ | |
eba5102d JO |
552 | static void close_dso(struct dso *dso) |
553 | { | |
554 | close_data_fd(dso); | |
555 | } | |
556 | ||
c6580451 JO |
557 | static void close_first_dso(void) |
558 | { | |
559 | struct dso *dso; | |
560 | ||
561 | dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); | |
562 | close_dso(dso); | |
563 | } | |
564 | ||
565 | static rlim_t get_fd_limit(void) | |
566 | { | |
567 | struct rlimit l; | |
568 | rlim_t limit = 0; | |
569 | ||
570 | /* Allow half of the current open fd limit. */ | |
571 | if (getrlimit(RLIMIT_NOFILE, &l) == 0) { | |
572 | if (l.rlim_cur == RLIM_INFINITY) | |
573 | limit = l.rlim_cur; | |
574 | else | |
575 | limit = l.rlim_cur / 2; | |
576 | } else { | |
577 | pr_err("failed to get fd limit\n"); | |
578 | limit = 1; | |
579 | } | |
580 | ||
581 | return limit; | |
582 | } | |
583 | ||
f3069249 JO |
584 | static rlim_t fd_limit; |
585 | ||
586 | /* | |
587 | * Used only by tests/dso-data.c to reset the environment | |
588 | * for tests. I dont expect we should change this during | |
589 | * standard runtime. | |
590 | */ | |
591 | void reset_fd_limit(void) | |
c6580451 | 592 | { |
f3069249 JO |
593 | fd_limit = 0; |
594 | } | |
c6580451 | 595 | |
f3069249 JO |
596 | static bool may_cache_fd(void) |
597 | { | |
598 | if (!fd_limit) | |
599 | fd_limit = get_fd_limit(); | |
c6580451 | 600 | |
f3069249 | 601 | if (fd_limit == RLIM_INFINITY) |
c6580451 JO |
602 | return true; |
603 | ||
f3069249 | 604 | return fd_limit > (rlim_t) dso__data_open_cnt; |
c6580451 JO |
605 | } |
606 | ||
c1f9aa0a JO |
607 | /* |
608 | * Check and close LRU dso if we crossed allowed limit | |
609 | * for opened dso file descriptors. The limit is half | |
610 | * of the RLIMIT_NOFILE files opened. | |
611 | */ | |
c6580451 JO |
612 | static void check_data_close(void) |
613 | { | |
614 | bool cache_fd = may_cache_fd(); | |
615 | ||
616 | if (!cache_fd) | |
617 | close_first_dso(); | |
618 | } | |
619 | ||
c1f9aa0a JO |
620 | /** |
621 | * dso__data_close - Close DSO data file | |
622 | * @dso: dso object | |
623 | * | |
624 | * External interface to close @dso's data file descriptor. | |
625 | */ | |
eba5102d JO |
626 | void dso__data_close(struct dso *dso) |
627 | { | |
33bdedce | 628 | pthread_mutex_lock(&dso__data_open_lock); |
eba5102d | 629 | close_dso(dso); |
33bdedce | 630 | pthread_mutex_unlock(&dso__data_open_lock); |
eba5102d JO |
631 | } |
632 | ||
71ff824a | 633 | static void try_to_open_dso(struct dso *dso, struct machine *machine) |
cdd059d7 | 634 | { |
631d34b5 | 635 | enum dso_binary_type binary_type_data[] = { |
cdd059d7 JO |
636 | DSO_BINARY_TYPE__BUILD_ID_CACHE, |
637 | DSO_BINARY_TYPE__SYSTEM_PATH_DSO, | |
638 | DSO_BINARY_TYPE__NOT_FOUND, | |
639 | }; | |
640 | int i = 0; | |
641 | ||
53fa8eaa | 642 | if (dso->data.fd >= 0) |
71ff824a | 643 | return; |
53fa8eaa JO |
644 | |
645 | if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { | |
646 | dso->data.fd = open_dso(dso, machine); | |
c27697d6 | 647 | goto out; |
53fa8eaa | 648 | } |
cdd059d7 JO |
649 | |
650 | do { | |
5f70619d | 651 | dso->binary_type = binary_type_data[i++]; |
cdd059d7 | 652 | |
c27697d6 AH |
653 | dso->data.fd = open_dso(dso, machine); |
654 | if (dso->data.fd >= 0) | |
655 | goto out; | |
cdd059d7 | 656 | |
5f70619d | 657 | } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); |
c27697d6 AH |
658 | out: |
659 | if (dso->data.fd >= 0) | |
660 | dso->data.status = DSO_DATA_STATUS_OK; | |
661 | else | |
662 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
71ff824a NK |
663 | } |
664 | ||
665 | /** | |
4bb11d01 | 666 | * dso__data_get_fd - Get dso's data file descriptor |
71ff824a NK |
667 | * @dso: dso object |
668 | * @machine: machine object | |
669 | * | |
670 | * External interface to find dso's file, open it and | |
4bb11d01 NK |
671 | * returns file descriptor. It should be paired with |
672 | * dso__data_put_fd() if it returns non-negative value. | |
71ff824a | 673 | */ |
4bb11d01 | 674 | int dso__data_get_fd(struct dso *dso, struct machine *machine) |
71ff824a NK |
675 | { |
676 | if (dso->data.status == DSO_DATA_STATUS_ERROR) | |
677 | return -1; | |
cdd059d7 | 678 | |
4bb11d01 NK |
679 | if (pthread_mutex_lock(&dso__data_open_lock) < 0) |
680 | return -1; | |
681 | ||
71ff824a | 682 | try_to_open_dso(dso, machine); |
4bb11d01 NK |
683 | |
684 | if (dso->data.fd < 0) | |
685 | pthread_mutex_unlock(&dso__data_open_lock); | |
71ff824a | 686 | |
c27697d6 | 687 | return dso->data.fd; |
cdd059d7 JO |
688 | } |
689 | ||
4bb11d01 NK |
690 | void dso__data_put_fd(struct dso *dso __maybe_unused) |
691 | { | |
692 | pthread_mutex_unlock(&dso__data_open_lock); | |
693 | } | |
694 | ||
288be943 AH |
695 | bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) |
696 | { | |
697 | u32 flag = 1 << by; | |
698 | ||
699 | if (dso->data.status_seen & flag) | |
700 | return true; | |
701 | ||
702 | dso->data.status_seen |= flag; | |
703 | ||
704 | return false; | |
705 | } | |
706 | ||
cdd059d7 | 707 | static void |
8e67b725 | 708 | dso_cache__free(struct dso *dso) |
cdd059d7 | 709 | { |
8e67b725 | 710 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
711 | struct rb_node *next = rb_first(root); |
712 | ||
8e67b725 | 713 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
714 | while (next) { |
715 | struct dso_cache *cache; | |
716 | ||
717 | cache = rb_entry(next, struct dso_cache, rb_node); | |
718 | next = rb_next(&cache->rb_node); | |
719 | rb_erase(&cache->rb_node, root); | |
720 | free(cache); | |
721 | } | |
8e67b725 | 722 | pthread_mutex_unlock(&dso->lock); |
cdd059d7 JO |
723 | } |
724 | ||
8e67b725 | 725 | static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset) |
cdd059d7 | 726 | { |
8e67b725 | 727 | const struct rb_root *root = &dso->data.cache; |
3344996e ACM |
728 | struct rb_node * const *p = &root->rb_node; |
729 | const struct rb_node *parent = NULL; | |
cdd059d7 JO |
730 | struct dso_cache *cache; |
731 | ||
732 | while (*p != NULL) { | |
733 | u64 end; | |
734 | ||
735 | parent = *p; | |
736 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
737 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
738 | ||
739 | if (offset < cache->offset) | |
740 | p = &(*p)->rb_left; | |
741 | else if (offset >= end) | |
742 | p = &(*p)->rb_right; | |
743 | else | |
744 | return cache; | |
745 | } | |
8e67b725 | 746 | |
cdd059d7 JO |
747 | return NULL; |
748 | } | |
749 | ||
8e67b725 NK |
750 | static struct dso_cache * |
751 | dso_cache__insert(struct dso *dso, struct dso_cache *new) | |
cdd059d7 | 752 | { |
8e67b725 | 753 | struct rb_root *root = &dso->data.cache; |
cdd059d7 JO |
754 | struct rb_node **p = &root->rb_node; |
755 | struct rb_node *parent = NULL; | |
756 | struct dso_cache *cache; | |
757 | u64 offset = new->offset; | |
758 | ||
8e67b725 | 759 | pthread_mutex_lock(&dso->lock); |
cdd059d7 JO |
760 | while (*p != NULL) { |
761 | u64 end; | |
762 | ||
763 | parent = *p; | |
764 | cache = rb_entry(parent, struct dso_cache, rb_node); | |
765 | end = cache->offset + DSO__DATA_CACHE_SIZE; | |
766 | ||
767 | if (offset < cache->offset) | |
768 | p = &(*p)->rb_left; | |
769 | else if (offset >= end) | |
770 | p = &(*p)->rb_right; | |
8e67b725 NK |
771 | else |
772 | goto out; | |
cdd059d7 JO |
773 | } |
774 | ||
775 | rb_link_node(&new->rb_node, parent, p); | |
776 | rb_insert_color(&new->rb_node, root); | |
8e67b725 NK |
777 | |
778 | cache = NULL; | |
779 | out: | |
780 | pthread_mutex_unlock(&dso->lock); | |
781 | return cache; | |
cdd059d7 JO |
782 | } |
783 | ||
784 | static ssize_t | |
785 | dso_cache__memcpy(struct dso_cache *cache, u64 offset, | |
786 | u8 *data, u64 size) | |
787 | { | |
788 | u64 cache_offset = offset - cache->offset; | |
789 | u64 cache_size = min(cache->size - cache_offset, size); | |
790 | ||
791 | memcpy(data, cache->data + cache_offset, cache_size); | |
792 | return cache_size; | |
793 | } | |
794 | ||
795 | static ssize_t | |
33bdedce NK |
796 | dso_cache__read(struct dso *dso, struct machine *machine, |
797 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
798 | { |
799 | struct dso_cache *cache; | |
8e67b725 | 800 | struct dso_cache *old; |
cdd059d7 | 801 | ssize_t ret; |
cdd059d7 JO |
802 | |
803 | do { | |
804 | u64 cache_offset; | |
805 | ||
cdd059d7 JO |
806 | cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); |
807 | if (!cache) | |
33bdedce NK |
808 | return -ENOMEM; |
809 | ||
810 | pthread_mutex_lock(&dso__data_open_lock); | |
811 | ||
812 | /* | |
813 | * dso->data.fd might be closed if other thread opened another | |
814 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
815 | */ | |
71ff824a NK |
816 | try_to_open_dso(dso, machine); |
817 | ||
33bdedce | 818 | if (dso->data.fd < 0) { |
71ff824a NK |
819 | ret = -errno; |
820 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
821 | break; | |
33bdedce | 822 | } |
cdd059d7 JO |
823 | |
824 | cache_offset = offset & DSO__DATA_CACHE_MASK; | |
cdd059d7 | 825 | |
c52686f9 | 826 | ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset); |
cdd059d7 JO |
827 | if (ret <= 0) |
828 | break; | |
829 | ||
830 | cache->offset = cache_offset; | |
831 | cache->size = ret; | |
33bdedce NK |
832 | } while (0); |
833 | ||
834 | pthread_mutex_unlock(&dso__data_open_lock); | |
835 | ||
836 | if (ret > 0) { | |
8e67b725 NK |
837 | old = dso_cache__insert(dso, cache); |
838 | if (old) { | |
839 | /* we lose the race */ | |
840 | free(cache); | |
841 | cache = old; | |
842 | } | |
cdd059d7 JO |
843 | |
844 | ret = dso_cache__memcpy(cache, offset, data, size); | |
33bdedce | 845 | } |
cdd059d7 JO |
846 | |
847 | if (ret <= 0) | |
848 | free(cache); | |
849 | ||
cdd059d7 JO |
850 | return ret; |
851 | } | |
852 | ||
33bdedce NK |
853 | static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, |
854 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
855 | { |
856 | struct dso_cache *cache; | |
857 | ||
8e67b725 | 858 | cache = dso_cache__find(dso, offset); |
cdd059d7 JO |
859 | if (cache) |
860 | return dso_cache__memcpy(cache, offset, data, size); | |
861 | else | |
33bdedce | 862 | return dso_cache__read(dso, machine, offset, data, size); |
cdd059d7 JO |
863 | } |
864 | ||
c1f9aa0a JO |
865 | /* |
866 | * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks | |
867 | * in the rb_tree. Any read to already cached data is served | |
868 | * by cached data. | |
869 | */ | |
33bdedce NK |
870 | static ssize_t cached_read(struct dso *dso, struct machine *machine, |
871 | u64 offset, u8 *data, ssize_t size) | |
cdd059d7 JO |
872 | { |
873 | ssize_t r = 0; | |
874 | u8 *p = data; | |
875 | ||
876 | do { | |
877 | ssize_t ret; | |
878 | ||
33bdedce | 879 | ret = dso_cache_read(dso, machine, offset, p, size); |
cdd059d7 JO |
880 | if (ret < 0) |
881 | return ret; | |
882 | ||
883 | /* Reached EOF, return what we have. */ | |
884 | if (!ret) | |
885 | break; | |
886 | ||
887 | BUG_ON(ret > size); | |
888 | ||
889 | r += ret; | |
890 | p += ret; | |
891 | offset += ret; | |
892 | size -= ret; | |
893 | ||
894 | } while (size); | |
895 | ||
896 | return r; | |
897 | } | |
898 | ||
b5c2161c | 899 | int dso__data_file_size(struct dso *dso, struct machine *machine) |
c3fbd2a6 | 900 | { |
33bdedce | 901 | int ret = 0; |
c3fbd2a6 | 902 | struct stat st; |
6e81c74c | 903 | char sbuf[STRERR_BUFSIZE]; |
c3fbd2a6 | 904 | |
33bdedce NK |
905 | if (dso->data.file_size) |
906 | return 0; | |
907 | ||
71ff824a NK |
908 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
909 | return -1; | |
910 | ||
33bdedce NK |
911 | pthread_mutex_lock(&dso__data_open_lock); |
912 | ||
913 | /* | |
914 | * dso->data.fd might be closed if other thread opened another | |
915 | * file (dso) due to open file limit (RLIMIT_NOFILE). | |
916 | */ | |
71ff824a NK |
917 | try_to_open_dso(dso, machine); |
918 | ||
33bdedce | 919 | if (dso->data.fd < 0) { |
71ff824a NK |
920 | ret = -errno; |
921 | dso->data.status = DSO_DATA_STATUS_ERROR; | |
922 | goto out; | |
c3fbd2a6 JO |
923 | } |
924 | ||
33bdedce NK |
925 | if (fstat(dso->data.fd, &st) < 0) { |
926 | ret = -errno; | |
927 | pr_err("dso cache fstat failed: %s\n", | |
c8b5f2c9 | 928 | str_error_r(errno, sbuf, sizeof(sbuf))); |
33bdedce NK |
929 | dso->data.status = DSO_DATA_STATUS_ERROR; |
930 | goto out; | |
931 | } | |
932 | dso->data.file_size = st.st_size; | |
933 | ||
934 | out: | |
935 | pthread_mutex_unlock(&dso__data_open_lock); | |
936 | return ret; | |
c3fbd2a6 JO |
937 | } |
938 | ||
6d363459 AH |
939 | /** |
940 | * dso__data_size - Return dso data size | |
941 | * @dso: dso object | |
942 | * @machine: machine object | |
943 | * | |
944 | * Return: dso data size | |
945 | */ | |
946 | off_t dso__data_size(struct dso *dso, struct machine *machine) | |
947 | { | |
b5c2161c | 948 | if (dso__data_file_size(dso, machine)) |
6d363459 AH |
949 | return -1; |
950 | ||
951 | /* For now just estimate dso data size is close to file size */ | |
952 | return dso->data.file_size; | |
953 | } | |
954 | ||
33bdedce NK |
955 | static ssize_t data_read_offset(struct dso *dso, struct machine *machine, |
956 | u64 offset, u8 *data, ssize_t size) | |
c3fbd2a6 | 957 | { |
b5c2161c | 958 | if (dso__data_file_size(dso, machine)) |
c3fbd2a6 JO |
959 | return -1; |
960 | ||
961 | /* Check the offset sanity. */ | |
962 | if (offset > dso->data.file_size) | |
963 | return -1; | |
964 | ||
965 | if (offset + size < offset) | |
966 | return -1; | |
967 | ||
33bdedce | 968 | return cached_read(dso, machine, offset, data, size); |
c3fbd2a6 JO |
969 | } |
970 | ||
c1f9aa0a JO |
971 | /** |
972 | * dso__data_read_offset - Read data from dso file offset | |
973 | * @dso: dso object | |
974 | * @machine: machine object | |
975 | * @offset: file offset | |
976 | * @data: buffer to store data | |
977 | * @size: size of the @data buffer | |
978 | * | |
979 | * External interface to read data from dso file offset. Open | |
980 | * dso data file and use cached_read to get the data. | |
981 | */ | |
c3fbd2a6 JO |
982 | ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, |
983 | u64 offset, u8 *data, ssize_t size) | |
984 | { | |
33bdedce | 985 | if (dso->data.status == DSO_DATA_STATUS_ERROR) |
c3fbd2a6 JO |
986 | return -1; |
987 | ||
33bdedce | 988 | return data_read_offset(dso, machine, offset, data, size); |
c3fbd2a6 JO |
989 | } |
990 | ||
c1f9aa0a JO |
991 | /** |
992 | * dso__data_read_addr - Read data from dso address | |
993 | * @dso: dso object | |
994 | * @machine: machine object | |
995 | * @add: virtual memory address | |
996 | * @data: buffer to store data | |
997 | * @size: size of the @data buffer | |
998 | * | |
999 | * External interface to read data from dso address. | |
1000 | */ | |
cdd059d7 JO |
1001 | ssize_t dso__data_read_addr(struct dso *dso, struct map *map, |
1002 | struct machine *machine, u64 addr, | |
1003 | u8 *data, ssize_t size) | |
1004 | { | |
1005 | u64 offset = map->map_ip(map, addr); | |
1006 | return dso__data_read_offset(dso, machine, offset, data, size); | |
1007 | } | |
1008 | ||
1009 | struct map *dso__new_map(const char *name) | |
1010 | { | |
1011 | struct map *map = NULL; | |
1012 | struct dso *dso = dso__new(name); | |
1013 | ||
1014 | if (dso) | |
3183f8ca | 1015 | map = map__new2(0, dso); |
cdd059d7 JO |
1016 | |
1017 | return map; | |
1018 | } | |
1019 | ||
459ce518 ACM |
1020 | struct dso *machine__findnew_kernel(struct machine *machine, const char *name, |
1021 | const char *short_name, int dso_type) | |
cdd059d7 JO |
1022 | { |
1023 | /* | |
1024 | * The kernel dso could be created by build_id processing. | |
1025 | */ | |
aa7cc2ae | 1026 | struct dso *dso = machine__findnew_dso(machine, name); |
cdd059d7 JO |
1027 | |
1028 | /* | |
1029 | * We need to run this in all cases, since during the build_id | |
1030 | * processing we had no idea this was the kernel dso. | |
1031 | */ | |
1032 | if (dso != NULL) { | |
58a98c9c | 1033 | dso__set_short_name(dso, short_name, false); |
cdd059d7 JO |
1034 | dso->kernel = dso_type; |
1035 | } | |
1036 | ||
1037 | return dso; | |
1038 | } | |
1039 | ||
4598a0a6 WL |
1040 | /* |
1041 | * Find a matching entry and/or link current entry to RB tree. | |
1042 | * Either one of the dso or name parameter must be non-NULL or the | |
1043 | * function will not work. | |
1044 | */ | |
e8807844 ACM |
1045 | static struct dso *__dso__findlink_by_longname(struct rb_root *root, |
1046 | struct dso *dso, const char *name) | |
4598a0a6 WL |
1047 | { |
1048 | struct rb_node **p = &root->rb_node; | |
1049 | struct rb_node *parent = NULL; | |
1050 | ||
1051 | if (!name) | |
1052 | name = dso->long_name; | |
1053 | /* | |
1054 | * Find node with the matching name | |
1055 | */ | |
1056 | while (*p) { | |
1057 | struct dso *this = rb_entry(*p, struct dso, rb_node); | |
1058 | int rc = strcmp(name, this->long_name); | |
1059 | ||
1060 | parent = *p; | |
1061 | if (rc == 0) { | |
1062 | /* | |
1063 | * In case the new DSO is a duplicate of an existing | |
0f5e1558 | 1064 | * one, print a one-time warning & put the new entry |
4598a0a6 WL |
1065 | * at the end of the list of duplicates. |
1066 | */ | |
1067 | if (!dso || (dso == this)) | |
1068 | return this; /* Find matching dso */ | |
1069 | /* | |
1070 | * The core kernel DSOs may have duplicated long name. | |
1071 | * In this case, the short name should be different. | |
1072 | * Comparing the short names to differentiate the DSOs. | |
1073 | */ | |
1074 | rc = strcmp(dso->short_name, this->short_name); | |
1075 | if (rc == 0) { | |
1076 | pr_err("Duplicated dso name: %s\n", name); | |
1077 | return NULL; | |
1078 | } | |
1079 | } | |
1080 | if (rc < 0) | |
1081 | p = &parent->rb_left; | |
1082 | else | |
1083 | p = &parent->rb_right; | |
1084 | } | |
1085 | if (dso) { | |
1086 | /* Add new node and rebalance tree */ | |
1087 | rb_link_node(&dso->rb_node, parent, p); | |
1088 | rb_insert_color(&dso->rb_node, root); | |
e266a753 | 1089 | dso->root = root; |
4598a0a6 WL |
1090 | } |
1091 | return NULL; | |
1092 | } | |
1093 | ||
e8807844 ACM |
1094 | static inline struct dso *__dso__find_by_longname(struct rb_root *root, |
1095 | const char *name) | |
4598a0a6 | 1096 | { |
e8807844 | 1097 | return __dso__findlink_by_longname(root, NULL, name); |
4598a0a6 WL |
1098 | } |
1099 | ||
bf4414ae | 1100 | void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 | 1101 | { |
e266a753 AH |
1102 | struct rb_root *root = dso->root; |
1103 | ||
cdd059d7 JO |
1104 | if (name == NULL) |
1105 | return; | |
7e155d4d ACM |
1106 | |
1107 | if (dso->long_name_allocated) | |
bf4414ae | 1108 | free((char *)dso->long_name); |
7e155d4d | 1109 | |
e266a753 AH |
1110 | if (root) { |
1111 | rb_erase(&dso->rb_node, root); | |
1112 | /* | |
1113 | * __dso__findlink_by_longname() isn't guaranteed to add it | |
1114 | * back, so a clean removal is required here. | |
1115 | */ | |
1116 | RB_CLEAR_NODE(&dso->rb_node); | |
1117 | dso->root = NULL; | |
1118 | } | |
1119 | ||
7e155d4d ACM |
1120 | dso->long_name = name; |
1121 | dso->long_name_len = strlen(name); | |
1122 | dso->long_name_allocated = name_allocated; | |
e266a753 AH |
1123 | |
1124 | if (root) | |
1125 | __dso__findlink_by_longname(root, dso, NULL); | |
cdd059d7 JO |
1126 | } |
1127 | ||
58a98c9c | 1128 | void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) |
cdd059d7 JO |
1129 | { |
1130 | if (name == NULL) | |
1131 | return; | |
58a98c9c AH |
1132 | |
1133 | if (dso->short_name_allocated) | |
1134 | free((char *)dso->short_name); | |
1135 | ||
1136 | dso->short_name = name; | |
1137 | dso->short_name_len = strlen(name); | |
1138 | dso->short_name_allocated = name_allocated; | |
cdd059d7 JO |
1139 | } |
1140 | ||
1141 | static void dso__set_basename(struct dso *dso) | |
1142 | { | |
ac5e7f84 SE |
1143 | /* |
1144 | * basename() may modify path buffer, so we must pass | |
1145 | * a copy. | |
1146 | */ | |
1147 | char *base, *lname = strdup(dso->long_name); | |
1148 | ||
1149 | if (!lname) | |
1150 | return; | |
1151 | ||
1152 | /* | |
1153 | * basename() may return a pointer to internal | |
1154 | * storage which is reused in subsequent calls | |
1155 | * so copy the result. | |
1156 | */ | |
1157 | base = strdup(basename(lname)); | |
1158 | ||
1159 | free(lname); | |
1160 | ||
1161 | if (!base) | |
1162 | return; | |
1163 | ||
1164 | dso__set_short_name(dso, base, true); | |
cdd059d7 JO |
1165 | } |
1166 | ||
1167 | int dso__name_len(const struct dso *dso) | |
1168 | { | |
1169 | if (!dso) | |
1170 | return strlen("[unknown]"); | |
bb963e16 | 1171 | if (verbose > 0) |
cdd059d7 JO |
1172 | return dso->long_name_len; |
1173 | ||
1174 | return dso->short_name_len; | |
1175 | } | |
1176 | ||
3183f8ca | 1177 | bool dso__loaded(const struct dso *dso) |
cdd059d7 | 1178 | { |
3183f8ca | 1179 | return dso->loaded; |
cdd059d7 JO |
1180 | } |
1181 | ||
3183f8ca | 1182 | bool dso__sorted_by_name(const struct dso *dso) |
cdd059d7 | 1183 | { |
3183f8ca | 1184 | return dso->sorted_by_name; |
cdd059d7 JO |
1185 | } |
1186 | ||
3183f8ca | 1187 | void dso__set_sorted_by_name(struct dso *dso) |
cdd059d7 | 1188 | { |
3183f8ca | 1189 | dso->sorted_by_name = true; |
cdd059d7 JO |
1190 | } |
1191 | ||
1192 | struct dso *dso__new(const char *name) | |
1193 | { | |
1194 | struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); | |
1195 | ||
1196 | if (dso != NULL) { | |
cdd059d7 | 1197 | strcpy(dso->name, name); |
7e155d4d | 1198 | dso__set_long_name(dso, dso->name, false); |
58a98c9c | 1199 | dso__set_short_name(dso, dso->name, false); |
3183f8ca | 1200 | dso->symbols = dso->symbol_names = RB_ROOT; |
ca40e2af | 1201 | dso->data.cache = RB_ROOT; |
55ecd631 DB |
1202 | dso->inlined_nodes = RB_ROOT_CACHED; |
1203 | dso->srclines = RB_ROOT_CACHED; | |
53fa8eaa | 1204 | dso->data.fd = -1; |
c27697d6 | 1205 | dso->data.status = DSO_DATA_STATUS_UNKNOWN; |
cdd059d7 | 1206 | dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; |
5f70619d | 1207 | dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND; |
c6d8f2a4 | 1208 | dso->is_64_bit = (sizeof(void *) == 8); |
cdd059d7 | 1209 | dso->loaded = 0; |
0131c4ec | 1210 | dso->rel = 0; |
cdd059d7 JO |
1211 | dso->sorted_by_name = 0; |
1212 | dso->has_build_id = 0; | |
2cc9d0ef | 1213 | dso->has_srcline = 1; |
906049c8 | 1214 | dso->a2l_fails = 1; |
cdd059d7 JO |
1215 | dso->kernel = DSO_TYPE_USER; |
1216 | dso->needs_swap = DSO_SWAP__UNSET; | |
2af52475 | 1217 | dso->comp = COMP_ID__NONE; |
4598a0a6 | 1218 | RB_CLEAR_NODE(&dso->rb_node); |
e266a753 | 1219 | dso->root = NULL; |
cdd059d7 | 1220 | INIT_LIST_HEAD(&dso->node); |
eba5102d | 1221 | INIT_LIST_HEAD(&dso->data.open_entry); |
4a936edc | 1222 | pthread_mutex_init(&dso->lock, NULL); |
7100810a | 1223 | refcount_set(&dso->refcnt, 1); |
cdd059d7 JO |
1224 | } |
1225 | ||
1226 | return dso; | |
1227 | } | |
1228 | ||
1229 | void dso__delete(struct dso *dso) | |
1230 | { | |
4598a0a6 WL |
1231 | if (!RB_EMPTY_NODE(&dso->rb_node)) |
1232 | pr_err("DSO %s is still in rbtree when being deleted!\n", | |
1233 | dso->long_name); | |
11ea2515 MW |
1234 | |
1235 | /* free inlines first, as they reference symbols */ | |
1236 | inlines__tree_delete(&dso->inlined_nodes); | |
21ac9d54 | 1237 | srcline__tree_delete(&dso->srclines); |
3183f8ca | 1238 | symbols__delete(&dso->symbols); |
ee021d42 ACM |
1239 | |
1240 | if (dso->short_name_allocated) { | |
04662523 | 1241 | zfree((char **)&dso->short_name); |
ee021d42 ACM |
1242 | dso->short_name_allocated = false; |
1243 | } | |
1244 | ||
1245 | if (dso->long_name_allocated) { | |
04662523 | 1246 | zfree((char **)&dso->long_name); |
ee021d42 ACM |
1247 | dso->long_name_allocated = false; |
1248 | } | |
1249 | ||
53fa8eaa | 1250 | dso__data_close(dso); |
cfe9174f | 1251 | auxtrace_cache__free(dso->auxtrace_cache); |
8e67b725 | 1252 | dso_cache__free(dso); |
454ff00f | 1253 | dso__free_a2l(dso); |
04662523 | 1254 | zfree(&dso->symsrc_filename); |
843ff37b | 1255 | nsinfo__zput(dso->nsinfo); |
4a936edc | 1256 | pthread_mutex_destroy(&dso->lock); |
cdd059d7 JO |
1257 | free(dso); |
1258 | } | |
1259 | ||
d3a7c489 ACM |
1260 | struct dso *dso__get(struct dso *dso) |
1261 | { | |
1262 | if (dso) | |
7100810a | 1263 | refcount_inc(&dso->refcnt); |
d3a7c489 ACM |
1264 | return dso; |
1265 | } | |
1266 | ||
1267 | void dso__put(struct dso *dso) | |
1268 | { | |
7100810a | 1269 | if (dso && refcount_dec_and_test(&dso->refcnt)) |
d3a7c489 ACM |
1270 | dso__delete(dso); |
1271 | } | |
1272 | ||
cdd059d7 JO |
1273 | void dso__set_build_id(struct dso *dso, void *build_id) |
1274 | { | |
1275 | memcpy(dso->build_id, build_id, sizeof(dso->build_id)); | |
1276 | dso->has_build_id = 1; | |
1277 | } | |
1278 | ||
1279 | bool dso__build_id_equal(const struct dso *dso, u8 *build_id) | |
1280 | { | |
1281 | return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; | |
1282 | } | |
1283 | ||
1284 | void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) | |
1285 | { | |
1286 | char path[PATH_MAX]; | |
1287 | ||
1288 | if (machine__is_default_guest(machine)) | |
1289 | return; | |
1290 | sprintf(path, "%s/sys/kernel/notes", machine->root_dir); | |
1291 | if (sysfs__read_build_id(path, dso->build_id, | |
1292 | sizeof(dso->build_id)) == 0) | |
1293 | dso->has_build_id = true; | |
1294 | } | |
1295 | ||
1296 | int dso__kernel_module_get_build_id(struct dso *dso, | |
1297 | const char *root_dir) | |
1298 | { | |
1299 | char filename[PATH_MAX]; | |
1300 | /* | |
1301 | * kernel module short names are of the form "[module]" and | |
1302 | * we need just "module" here. | |
1303 | */ | |
1304 | const char *name = dso->short_name + 1; | |
1305 | ||
1306 | snprintf(filename, sizeof(filename), | |
1307 | "%s/sys/module/%.*s/notes/.note.gnu.build-id", | |
1308 | root_dir, (int)strlen(name) - 1, name); | |
1309 | ||
1310 | if (sysfs__read_build_id(filename, dso->build_id, | |
1311 | sizeof(dso->build_id)) == 0) | |
1312 | dso->has_build_id = true; | |
1313 | ||
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | bool __dsos__read_build_ids(struct list_head *head, bool with_hits) | |
1318 | { | |
1319 | bool have_build_id = false; | |
1320 | struct dso *pos; | |
f045b8c4 | 1321 | struct nscookie nsc; |
cdd059d7 JO |
1322 | |
1323 | list_for_each_entry(pos, head, node) { | |
6ae98ba6 | 1324 | if (with_hits && !pos->hit && !dso__is_vdso(pos)) |
cdd059d7 JO |
1325 | continue; |
1326 | if (pos->has_build_id) { | |
1327 | have_build_id = true; | |
1328 | continue; | |
1329 | } | |
f045b8c4 | 1330 | nsinfo__mountns_enter(pos->nsinfo, &nsc); |
cdd059d7 JO |
1331 | if (filename__read_build_id(pos->long_name, pos->build_id, |
1332 | sizeof(pos->build_id)) > 0) { | |
1333 | have_build_id = true; | |
1334 | pos->has_build_id = true; | |
1335 | } | |
f045b8c4 | 1336 | nsinfo__mountns_exit(&nsc); |
cdd059d7 JO |
1337 | } |
1338 | ||
1339 | return have_build_id; | |
1340 | } | |
1341 | ||
e8807844 | 1342 | void __dsos__add(struct dsos *dsos, struct dso *dso) |
cdd059d7 | 1343 | { |
8fa7d87f | 1344 | list_add_tail(&dso->node, &dsos->head); |
e8807844 | 1345 | __dso__findlink_by_longname(&dsos->root, dso, NULL); |
d3a7c489 ACM |
1346 | /* |
1347 | * It is now in the linked list, grab a reference, then garbage collect | |
1348 | * this when needing memory, by looking at LRU dso instances in the | |
1349 | * list with atomic_read(&dso->refcnt) == 1, i.e. no references | |
1350 | * anywhere besides the one for the list, do, under a lock for the | |
1351 | * list: remove it from the list, then a dso__put(), that probably will | |
1352 | * be the last and will then call dso__delete(), end of life. | |
1353 | * | |
1354 | * That, or at the end of the 'struct machine' lifetime, when all | |
1355 | * 'struct dso' instances will be removed from the list, in | |
1356 | * dsos__exit(), if they have no other reference from some other data | |
1357 | * structure. | |
1358 | * | |
1359 | * E.g.: after processing a 'perf.data' file and storing references | |
1360 | * to objects instantiated while processing events, we will have | |
1361 | * references to the 'thread', 'map', 'dso' structs all from 'struct | |
1362 | * hist_entry' instances, but we may not need anything not referenced, | |
1363 | * so we might as well call machines__exit()/machines__delete() and | |
1364 | * garbage collect it. | |
1365 | */ | |
1366 | dso__get(dso); | |
e8807844 ACM |
1367 | } |
1368 | ||
1369 | void dsos__add(struct dsos *dsos, struct dso *dso) | |
1370 | { | |
0a7c74ea | 1371 | down_write(&dsos->lock); |
e8807844 | 1372 | __dsos__add(dsos, dso); |
0a7c74ea | 1373 | up_write(&dsos->lock); |
cdd059d7 JO |
1374 | } |
1375 | ||
e8807844 | 1376 | struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
cdd059d7 JO |
1377 | { |
1378 | struct dso *pos; | |
1379 | ||
f9ceffb6 | 1380 | if (cmp_short) { |
8fa7d87f | 1381 | list_for_each_entry(pos, &dsos->head, node) |
f9ceffb6 WL |
1382 | if (strcmp(pos->short_name, name) == 0) |
1383 | return pos; | |
1384 | return NULL; | |
1385 | } | |
e8807844 | 1386 | return __dso__find_by_longname(&dsos->root, name); |
cdd059d7 JO |
1387 | } |
1388 | ||
e8807844 ACM |
1389 | struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short) |
1390 | { | |
1391 | struct dso *dso; | |
0a7c74ea | 1392 | down_read(&dsos->lock); |
e8807844 | 1393 | dso = __dsos__find(dsos, name, cmp_short); |
0a7c74ea | 1394 | up_read(&dsos->lock); |
e8807844 ACM |
1395 | return dso; |
1396 | } | |
1397 | ||
1398 | struct dso *__dsos__addnew(struct dsos *dsos, const char *name) | |
cdd059d7 | 1399 | { |
701d8d7f | 1400 | struct dso *dso = dso__new(name); |
cdd059d7 | 1401 | |
701d8d7f | 1402 | if (dso != NULL) { |
e8807844 | 1403 | __dsos__add(dsos, dso); |
701d8d7f | 1404 | dso__set_basename(dso); |
82de26ab MH |
1405 | /* Put dso here because __dsos_add already got it */ |
1406 | dso__put(dso); | |
cdd059d7 | 1407 | } |
cdd059d7 JO |
1408 | return dso; |
1409 | } | |
1410 | ||
701d8d7f JO |
1411 | struct dso *__dsos__findnew(struct dsos *dsos, const char *name) |
1412 | { | |
e8807844 ACM |
1413 | struct dso *dso = __dsos__find(dsos, name, false); |
1414 | ||
1415 | return dso ? dso : __dsos__addnew(dsos, name); | |
1416 | } | |
701d8d7f | 1417 | |
e8807844 ACM |
1418 | struct dso *dsos__findnew(struct dsos *dsos, const char *name) |
1419 | { | |
1420 | struct dso *dso; | |
0a7c74ea | 1421 | down_write(&dsos->lock); |
d3a7c489 | 1422 | dso = dso__get(__dsos__findnew(dsos, name)); |
0a7c74ea | 1423 | up_write(&dsos->lock); |
e8807844 | 1424 | return dso; |
701d8d7f JO |
1425 | } |
1426 | ||
cdd059d7 | 1427 | size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, |
417c2ff6 | 1428 | bool (skip)(struct dso *dso, int parm), int parm) |
cdd059d7 JO |
1429 | { |
1430 | struct dso *pos; | |
1431 | size_t ret = 0; | |
1432 | ||
1433 | list_for_each_entry(pos, head, node) { | |
417c2ff6 | 1434 | if (skip && skip(pos, parm)) |
cdd059d7 JO |
1435 | continue; |
1436 | ret += dso__fprintf_buildid(pos, fp); | |
1437 | ret += fprintf(fp, " %s\n", pos->long_name); | |
1438 | } | |
1439 | return ret; | |
1440 | } | |
1441 | ||
1442 | size_t __dsos__fprintf(struct list_head *head, FILE *fp) | |
1443 | { | |
1444 | struct dso *pos; | |
1445 | size_t ret = 0; | |
1446 | ||
1447 | list_for_each_entry(pos, head, node) { | |
3183f8ca | 1448 | ret += dso__fprintf(pos, fp); |
cdd059d7 JO |
1449 | } |
1450 | ||
1451 | return ret; | |
1452 | } | |
1453 | ||
1454 | size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) | |
1455 | { | |
b5d8bbe8 | 1456 | char sbuild_id[SBUILD_ID_SIZE]; |
cdd059d7 JO |
1457 | |
1458 | build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); | |
1459 | return fprintf(fp, "%s", sbuild_id); | |
1460 | } | |
1461 | ||
3183f8ca | 1462 | size_t dso__fprintf(struct dso *dso, FILE *fp) |
cdd059d7 JO |
1463 | { |
1464 | struct rb_node *nd; | |
1465 | size_t ret = fprintf(fp, "dso: %s (", dso->short_name); | |
1466 | ||
1467 | if (dso->short_name != dso->long_name) | |
1468 | ret += fprintf(fp, "%s, ", dso->long_name); | |
3183f8ca | 1469 | ret += fprintf(fp, "%sloaded, ", dso__loaded(dso) ? "" : "NOT "); |
cdd059d7 JO |
1470 | ret += dso__fprintf_buildid(dso, fp); |
1471 | ret += fprintf(fp, ")\n"); | |
3183f8ca | 1472 | for (nd = rb_first(&dso->symbols); nd; nd = rb_next(nd)) { |
cdd059d7 JO |
1473 | struct symbol *pos = rb_entry(nd, struct symbol, rb_node); |
1474 | ret += symbol__fprintf(pos, fp); | |
1475 | } | |
1476 | ||
1477 | return ret; | |
1478 | } | |
2b5b8bb2 AH |
1479 | |
1480 | enum dso_type dso__type(struct dso *dso, struct machine *machine) | |
1481 | { | |
1482 | int fd; | |
4bb11d01 | 1483 | enum dso_type type = DSO__TYPE_UNKNOWN; |
2b5b8bb2 | 1484 | |
4bb11d01 NK |
1485 | fd = dso__data_get_fd(dso, machine); |
1486 | if (fd >= 0) { | |
1487 | type = dso__type_fd(fd); | |
1488 | dso__data_put_fd(dso); | |
1489 | } | |
2b5b8bb2 | 1490 | |
4bb11d01 | 1491 | return type; |
2b5b8bb2 | 1492 | } |
18425f13 ACM |
1493 | |
1494 | int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) | |
1495 | { | |
1496 | int idx, errnum = dso->load_errno; | |
1497 | /* | |
1498 | * This must have a same ordering as the enum dso_load_errno. | |
1499 | */ | |
1500 | static const char *dso_load__error_str[] = { | |
1501 | "Internal tools/perf/ library error", | |
1502 | "Invalid ELF file", | |
1503 | "Can not read build id", | |
1504 | "Mismatching build id", | |
1505 | "Decompression failure", | |
1506 | }; | |
1507 | ||
1508 | BUG_ON(buflen == 0); | |
1509 | ||
1510 | if (errnum >= 0) { | |
c8b5f2c9 | 1511 | const char *err = str_error_r(errnum, buf, buflen); |
18425f13 ACM |
1512 | |
1513 | if (err != buf) | |
1514 | scnprintf(buf, buflen, "%s", err); | |
1515 | ||
1516 | return 0; | |
1517 | } | |
1518 | ||
1519 | if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END) | |
1520 | return -1; | |
1521 | ||
1522 | idx = errnum - __DSO_LOAD_ERRNO__START; | |
1523 | scnprintf(buf, buflen, "%s", dso_load__error_str[idx]); | |
1524 | return 0; | |
1525 | } |