~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/tools/perf/util/dso.c

Version: ~ [ linux-5.11-rc3 ] ~ [ linux-5.10.7 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.89 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.167 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.215 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.251 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.251 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp