3 #include <sys/resource.h>
11 char dso__symtab_origin(const struct dso *dso)
13 static const char origin[] = {
14 [DSO_BINARY_TYPE__KALLSYMS] = 'k',
15 [DSO_BINARY_TYPE__VMLINUX] = 'v',
16 [DSO_BINARY_TYPE__JAVA_JIT] = 'j',
17 [DSO_BINARY_TYPE__DEBUGLINK] = 'l',
18 [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B',
19 [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f',
20 [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u',
21 [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o',
22 [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b',
23 [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd',
24 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K',
25 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm',
26 [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g',
27 [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G',
28 [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M',
29 [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V',
32 if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
34 return origin[dso->symtab_type];
37 int dso__read_binary_type_filename(const struct dso *dso,
38 enum dso_binary_type type,
39 char *root_dir, char *filename, size_t size)
41 char build_id_hex[SBUILD_ID_SIZE];
46 case DSO_BINARY_TYPE__DEBUGLINK: {
49 len = __symbol__join_symfs(filename, size, dso->long_name);
50 debuglink = filename + len;
51 while (debuglink != filename && *debuglink != '/')
53 if (*debuglink == '/')
57 if (!is_regular_file(filename))
60 ret = filename__read_debuglink(filename, debuglink,
61 size - (debuglink - filename));
64 case DSO_BINARY_TYPE__BUILD_ID_CACHE:
65 /* skip the locally configured cache if a symfs is given */
66 if (symbol_conf.symfs[0] ||
67 (dso__build_id_filename(dso, filename, size) == NULL))
71 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
72 len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
73 snprintf(filename + len, size - len, "%s.debug", dso->long_name);
76 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
77 len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
78 snprintf(filename + len, size - len, "%s", dso->long_name);
81 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
83 const char *last_slash;
86 last_slash = dso->long_name + dso->long_name_len;
87 while (last_slash != dso->long_name && *last_slash != '/')
90 len = __symbol__join_symfs(filename, size, "");
91 dir_size = last_slash - dso->long_name + 2;
92 if (dir_size > (size - len)) {
96 len += scnprintf(filename + len, dir_size, "%s", dso->long_name);
97 len += scnprintf(filename + len , size - len, ".debug%s",
102 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
103 if (!dso->has_build_id) {
108 build_id__sprintf(dso->build_id,
109 sizeof(dso->build_id),
111 len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/");
112 snprintf(filename + len, size - len, "%.2s/%s.debug",
113 build_id_hex, build_id_hex + 2);
116 case DSO_BINARY_TYPE__VMLINUX:
117 case DSO_BINARY_TYPE__GUEST_VMLINUX:
118 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
119 __symbol__join_symfs(filename, size, dso->long_name);
122 case DSO_BINARY_TYPE__GUEST_KMODULE:
123 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
124 path__join3(filename, size, symbol_conf.symfs,
125 root_dir, dso->long_name);
128 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
129 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
130 __symbol__join_symfs(filename, size, dso->long_name);
133 case DSO_BINARY_TYPE__KCORE:
134 case DSO_BINARY_TYPE__GUEST_KCORE:
135 snprintf(filename, size, "%s", dso->long_name);
139 case DSO_BINARY_TYPE__KALLSYMS:
140 case DSO_BINARY_TYPE__GUEST_KALLSYMS:
141 case DSO_BINARY_TYPE__JAVA_JIT:
142 case DSO_BINARY_TYPE__NOT_FOUND:
150 static const struct {
152 int (*decompress)(const char *input, int output);
154 #ifdef HAVE_ZLIB_SUPPORT
155 { "gz", gzip_decompress_to_file },
157 #ifdef HAVE_LZMA_SUPPORT
158 { "xz", lzma_decompress_to_file },
163 bool is_supported_compression(const char *ext)
167 for (i = 0; compressions[i].fmt; i++) {
168 if (!strcmp(ext, compressions[i].fmt))
174 bool is_kernel_module(const char *pathname, int cpumode)
177 int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK;
179 WARN_ONCE(mode != cpumode,
180 "Internal error: passing unmasked cpumode (%x) to is_kernel_module",
184 case PERF_RECORD_MISC_USER:
185 case PERF_RECORD_MISC_HYPERVISOR:
186 case PERF_RECORD_MISC_GUEST_USER:
188 /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */
190 if (kmod_path__parse(&m, pathname)) {
191 pr_err("Failed to check whether %s is a kernel module or not. Assume it is.",
200 bool decompress_to_file(const char *ext, const char *filename, int output_fd)
204 for (i = 0; compressions[i].fmt; i++) {
205 if (!strcmp(ext, compressions[i].fmt))
206 return !compressions[i].decompress(filename,
212 bool dso__needs_decompress(struct dso *dso)
214 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
215 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
219 * Parses kernel module specified in @path and updates
222 * @comp - true if @path contains supported compression suffix,
224 * @kmod - true if @path contains '.ko' suffix in right position,
226 * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name
227 * of the kernel module without suffixes, otherwise strudup-ed
229 * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string
230 * the compression suffix
232 * Returns 0 if there's no strdup error, -ENOMEM otherwise.
234 int __kmod_path__parse(struct kmod_path *m, const char *path,
235 bool alloc_name, bool alloc_ext)
237 const char *name = strrchr(path, '/');
238 const char *ext = strrchr(path, '.');
239 bool is_simple_name = false;
241 memset(m, 0x0, sizeof(*m));
242 name = name ? name + 1 : path;
245 * '.' is also a valid character for module name. For example:
246 * [aaa.bbb] is a valid module name. '[' should have higher
247 * priority than '.ko' suffix.
249 * The kernel names are from machine__mmap_name. Such
250 * name should belong to kernel itself, not kernel module.
252 if (name[0] == '[') {
253 is_simple_name = true;
254 if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) ||
255 (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) ||
256 (strncmp(name, "[vdso]", 6) == 0) ||
257 (strncmp(name, "[vsyscall]", 10) == 0)) {
264 /* No extension, just return name. */
265 if ((ext == NULL) || is_simple_name) {
267 m->name = strdup(name);
268 return m->name ? 0 : -ENOMEM;
273 if (is_supported_compression(ext + 1)) {
278 /* Check .ko extension only if there's enough name left. */
280 m->kmod = !strncmp(ext, ".ko", 3);
284 if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1)
287 if (asprintf(&m->name, "%s", name) == -1)
291 strxfrchar(m->name, '-', '_');
294 if (alloc_ext && m->comp) {
295 m->ext = strdup(ext + 4);
297 free((void *) m->name);
306 * Global list of open DSOs and the counter.
308 static LIST_HEAD(dso__data_open);
309 static long dso__data_open_cnt;
310 static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER;
312 static void dso__list_add(struct dso *dso)
314 list_add_tail(&dso->data.open_entry, &dso__data_open);
315 dso__data_open_cnt++;
318 static void dso__list_del(struct dso *dso)
320 list_del(&dso->data.open_entry);
321 WARN_ONCE(dso__data_open_cnt <= 0,
322 "DSO data fd counter out of bounds.");
323 dso__data_open_cnt--;
326 static void close_first_dso(void);
328 static int do_open(char *name)
331 char sbuf[STRERR_BUFSIZE];
334 fd = open(name, O_RDONLY);
338 pr_debug("dso open failed: %s\n",
339 strerror_r(errno, sbuf, sizeof(sbuf)));
340 if (!dso__data_open_cnt || errno != EMFILE)
349 static int __open_dso(struct dso *dso, struct machine *machine)
352 char *root_dir = (char *)"";
353 char *name = malloc(PATH_MAX);
359 root_dir = machine->root_dir;
361 if (dso__read_binary_type_filename(dso, dso->binary_type,
362 root_dir, name, PATH_MAX)) {
372 static void check_data_close(void);
375 * dso_close - Open DSO data file
378 * Open @dso's data file descriptor and updates
379 * list/count of open DSO objects.
381 static int open_dso(struct dso *dso, struct machine *machine)
383 int fd = __open_dso(dso, machine);
388 * Check if we crossed the allowed number
389 * of opened DSOs and close one if needed.
397 static void close_data_fd(struct dso *dso)
399 if (dso->data.fd >= 0) {
402 dso->data.file_size = 0;
408 * dso_close - Close DSO data file
411 * Close @dso's data file descriptor and updates
412 * list/count of open DSO objects.
414 static void close_dso(struct dso *dso)
419 static void close_first_dso(void)
423 dso = list_first_entry(&dso__data_open, struct dso, data.open_entry);
427 static rlim_t get_fd_limit(void)
432 /* Allow half of the current open fd limit. */
433 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
434 if (l.rlim_cur == RLIM_INFINITY)
437 limit = l.rlim_cur / 2;
439 pr_err("failed to get fd limit\n");
446 static bool may_cache_fd(void)
451 limit = get_fd_limit();
453 if (limit == RLIM_INFINITY)
456 return limit > (rlim_t) dso__data_open_cnt;
460 * Check and close LRU dso if we crossed allowed limit
461 * for opened dso file descriptors. The limit is half
462 * of the RLIMIT_NOFILE files opened.
464 static void check_data_close(void)
466 bool cache_fd = may_cache_fd();
473 * dso__data_close - Close DSO data file
476 * External interface to close @dso's data file descriptor.
478 void dso__data_close(struct dso *dso)
480 pthread_mutex_lock(&dso__data_open_lock);
482 pthread_mutex_unlock(&dso__data_open_lock);
485 static void try_to_open_dso(struct dso *dso, struct machine *machine)
487 enum dso_binary_type binary_type_data[] = {
488 DSO_BINARY_TYPE__BUILD_ID_CACHE,
489 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
490 DSO_BINARY_TYPE__NOT_FOUND,
494 if (dso->data.fd >= 0)
497 if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
498 dso->data.fd = open_dso(dso, machine);
503 dso->binary_type = binary_type_data[i++];
505 dso->data.fd = open_dso(dso, machine);
506 if (dso->data.fd >= 0)
509 } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
511 if (dso->data.fd >= 0)
512 dso->data.status = DSO_DATA_STATUS_OK;
514 dso->data.status = DSO_DATA_STATUS_ERROR;
518 * dso__data_get_fd - Get dso's data file descriptor
520 * @machine: machine object
522 * External interface to find dso's file, open it and
523 * returns file descriptor. It should be paired with
524 * dso__data_put_fd() if it returns non-negative value.
526 int dso__data_get_fd(struct dso *dso, struct machine *machine)
528 if (dso->data.status == DSO_DATA_STATUS_ERROR)
531 if (pthread_mutex_lock(&dso__data_open_lock) < 0)
534 try_to_open_dso(dso, machine);
536 if (dso->data.fd < 0)
537 pthread_mutex_unlock(&dso__data_open_lock);
542 void dso__data_put_fd(struct dso *dso __maybe_unused)
544 pthread_mutex_unlock(&dso__data_open_lock);
547 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
551 if (dso->data.status_seen & flag)
554 dso->data.status_seen |= flag;
560 dso_cache__free(struct dso *dso)
562 struct rb_root *root = &dso->data.cache;
563 struct rb_node *next = rb_first(root);
565 pthread_mutex_lock(&dso->lock);
567 struct dso_cache *cache;
569 cache = rb_entry(next, struct dso_cache, rb_node);
570 next = rb_next(&cache->rb_node);
571 rb_erase(&cache->rb_node, root);
574 pthread_mutex_unlock(&dso->lock);
577 static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset)
579 const struct rb_root *root = &dso->data.cache;
580 struct rb_node * const *p = &root->rb_node;
581 const struct rb_node *parent = NULL;
582 struct dso_cache *cache;
588 cache = rb_entry(parent, struct dso_cache, rb_node);
589 end = cache->offset + DSO__DATA_CACHE_SIZE;
591 if (offset < cache->offset)
593 else if (offset >= end)
602 static struct dso_cache *
603 dso_cache__insert(struct dso *dso, struct dso_cache *new)
605 struct rb_root *root = &dso->data.cache;
606 struct rb_node **p = &root->rb_node;
607 struct rb_node *parent = NULL;
608 struct dso_cache *cache;
609 u64 offset = new->offset;
611 pthread_mutex_lock(&dso->lock);
616 cache = rb_entry(parent, struct dso_cache, rb_node);
617 end = cache->offset + DSO__DATA_CACHE_SIZE;
619 if (offset < cache->offset)
621 else if (offset >= end)
627 rb_link_node(&new->rb_node, parent, p);
628 rb_insert_color(&new->rb_node, root);
632 pthread_mutex_unlock(&dso->lock);
637 dso_cache__memcpy(struct dso_cache *cache, u64 offset,
640 u64 cache_offset = offset - cache->offset;
641 u64 cache_size = min(cache->size - cache_offset, size);
643 memcpy(data, cache->data + cache_offset, cache_size);
648 dso_cache__read(struct dso *dso, struct machine *machine,
649 u64 offset, u8 *data, ssize_t size)
651 struct dso_cache *cache;
652 struct dso_cache *old;
658 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
662 pthread_mutex_lock(&dso__data_open_lock);
665 * dso->data.fd might be closed if other thread opened another
666 * file (dso) due to open file limit (RLIMIT_NOFILE).
668 try_to_open_dso(dso, machine);
670 if (dso->data.fd < 0) {
672 dso->data.status = DSO_DATA_STATUS_ERROR;
676 cache_offset = offset & DSO__DATA_CACHE_MASK;
678 ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset);
682 cache->offset = cache_offset;
686 pthread_mutex_unlock(&dso__data_open_lock);
689 old = dso_cache__insert(dso, cache);
691 /* we lose the race */
696 ret = dso_cache__memcpy(cache, offset, data, size);
705 static ssize_t dso_cache_read(struct dso *dso, struct machine *machine,
706 u64 offset, u8 *data, ssize_t size)
708 struct dso_cache *cache;
710 cache = dso_cache__find(dso, offset);
712 return dso_cache__memcpy(cache, offset, data, size);
714 return dso_cache__read(dso, machine, offset, data, size);
718 * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks
719 * in the rb_tree. Any read to already cached data is served
722 static ssize_t cached_read(struct dso *dso, struct machine *machine,
723 u64 offset, u8 *data, ssize_t size)
731 ret = dso_cache_read(dso, machine, offset, p, size);
735 /* Reached EOF, return what we have. */
751 static int data_file_size(struct dso *dso, struct machine *machine)
755 char sbuf[STRERR_BUFSIZE];
757 if (dso->data.file_size)
760 if (dso->data.status == DSO_DATA_STATUS_ERROR)
763 pthread_mutex_lock(&dso__data_open_lock);
766 * dso->data.fd might be closed if other thread opened another
767 * file (dso) due to open file limit (RLIMIT_NOFILE).
769 try_to_open_dso(dso, machine);
771 if (dso->data.fd < 0) {
773 dso->data.status = DSO_DATA_STATUS_ERROR;
777 if (fstat(dso->data.fd, &st) < 0) {
779 pr_err("dso cache fstat failed: %s\n",
780 strerror_r(errno, sbuf, sizeof(sbuf)));
781 dso->data.status = DSO_DATA_STATUS_ERROR;
784 dso->data.file_size = st.st_size;
787 pthread_mutex_unlock(&dso__data_open_lock);
792 * dso__data_size - Return dso data size
794 * @machine: machine object
796 * Return: dso data size
798 off_t dso__data_size(struct dso *dso, struct machine *machine)
800 if (data_file_size(dso, machine))
803 /* For now just estimate dso data size is close to file size */
804 return dso->data.file_size;
807 static ssize_t data_read_offset(struct dso *dso, struct machine *machine,
808 u64 offset, u8 *data, ssize_t size)
810 if (data_file_size(dso, machine))
813 /* Check the offset sanity. */
814 if (offset > dso->data.file_size)
817 if (offset + size < offset)
820 return cached_read(dso, machine, offset, data, size);
824 * dso__data_read_offset - Read data from dso file offset
826 * @machine: machine object
827 * @offset: file offset
828 * @data: buffer to store data
829 * @size: size of the @data buffer
831 * External interface to read data from dso file offset. Open
832 * dso data file and use cached_read to get the data.
834 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
835 u64 offset, u8 *data, ssize_t size)
837 if (dso->data.status == DSO_DATA_STATUS_ERROR)
840 return data_read_offset(dso, machine, offset, data, size);
844 * dso__data_read_addr - Read data from dso address
846 * @machine: machine object
847 * @add: virtual memory address
848 * @data: buffer to store data
849 * @size: size of the @data buffer
851 * External interface to read data from dso address.
853 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
854 struct machine *machine, u64 addr,
855 u8 *data, ssize_t size)
857 u64 offset = map->map_ip(map, addr);
858 return dso__data_read_offset(dso, machine, offset, data, size);
861 struct map *dso__new_map(const char *name)
863 struct map *map = NULL;
864 struct dso *dso = dso__new(name);
867 map = map__new2(0, dso, MAP__FUNCTION);
872 struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
873 const char *short_name, int dso_type)
876 * The kernel dso could be created by build_id processing.
878 struct dso *dso = machine__findnew_dso(machine, name);
881 * We need to run this in all cases, since during the build_id
882 * processing we had no idea this was the kernel dso.
885 dso__set_short_name(dso, short_name, false);
886 dso->kernel = dso_type;
893 * Find a matching entry and/or link current entry to RB tree.
894 * Either one of the dso or name parameter must be non-NULL or the
895 * function will not work.
897 static struct dso *__dso__findlink_by_longname(struct rb_root *root,
898 struct dso *dso, const char *name)
900 struct rb_node **p = &root->rb_node;
901 struct rb_node *parent = NULL;
904 name = dso->long_name;
906 * Find node with the matching name
909 struct dso *this = rb_entry(*p, struct dso, rb_node);
910 int rc = strcmp(name, this->long_name);
915 * In case the new DSO is a duplicate of an existing
916 * one, print an one-time warning & put the new entry
917 * at the end of the list of duplicates.
919 if (!dso || (dso == this))
920 return this; /* Find matching dso */
922 * The core kernel DSOs may have duplicated long name.
923 * In this case, the short name should be different.
924 * Comparing the short names to differentiate the DSOs.
926 rc = strcmp(dso->short_name, this->short_name);
928 pr_err("Duplicated dso name: %s\n", name);
933 p = &parent->rb_left;
935 p = &parent->rb_right;
938 /* Add new node and rebalance tree */
939 rb_link_node(&dso->rb_node, parent, p);
940 rb_insert_color(&dso->rb_node, root);
946 static inline struct dso *__dso__find_by_longname(struct rb_root *root,
949 return __dso__findlink_by_longname(root, NULL, name);
952 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
954 struct rb_root *root = dso->root;
959 if (dso->long_name_allocated)
960 free((char *)dso->long_name);
963 rb_erase(&dso->rb_node, root);
965 * __dso__findlink_by_longname() isn't guaranteed to add it
966 * back, so a clean removal is required here.
968 RB_CLEAR_NODE(&dso->rb_node);
972 dso->long_name = name;
973 dso->long_name_len = strlen(name);
974 dso->long_name_allocated = name_allocated;
977 __dso__findlink_by_longname(root, dso, NULL);
980 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
985 if (dso->short_name_allocated)
986 free((char *)dso->short_name);
988 dso->short_name = name;
989 dso->short_name_len = strlen(name);
990 dso->short_name_allocated = name_allocated;
993 static void dso__set_basename(struct dso *dso)
996 * basename() may modify path buffer, so we must pass
999 char *base, *lname = strdup(dso->long_name);
1005 * basename() may return a pointer to internal
1006 * storage which is reused in subsequent calls
1007 * so copy the result.
1009 base = strdup(basename(lname));
1016 dso__set_short_name(dso, base, true);
1019 int dso__name_len(const struct dso *dso)
1022 return strlen("[unknown]");
1024 return dso->long_name_len;
1026 return dso->short_name_len;
1029 bool dso__loaded(const struct dso *dso, enum map_type type)
1031 return dso->loaded & (1 << type);
1034 bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
1036 return dso->sorted_by_name & (1 << type);
1039 void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
1041 dso->sorted_by_name |= (1 << type);
1044 struct dso *dso__new(const char *name)
1046 struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
1050 strcpy(dso->name, name);
1051 dso__set_long_name(dso, dso->name, false);
1052 dso__set_short_name(dso, dso->name, false);
1053 for (i = 0; i < MAP__NR_TYPES; ++i)
1054 dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
1055 dso->data.cache = RB_ROOT;
1057 dso->data.status = DSO_DATA_STATUS_UNKNOWN;
1058 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
1059 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
1060 dso->is_64_bit = (sizeof(void *) == 8);
1063 dso->sorted_by_name = 0;
1064 dso->has_build_id = 0;
1065 dso->has_srcline = 1;
1067 dso->kernel = DSO_TYPE_USER;
1068 dso->needs_swap = DSO_SWAP__UNSET;
1069 RB_CLEAR_NODE(&dso->rb_node);
1071 INIT_LIST_HEAD(&dso->node);
1072 INIT_LIST_HEAD(&dso->data.open_entry);
1073 pthread_mutex_init(&dso->lock, NULL);
1074 atomic_set(&dso->refcnt, 1);
1080 void dso__delete(struct dso *dso)
1084 if (!RB_EMPTY_NODE(&dso->rb_node))
1085 pr_err("DSO %s is still in rbtree when being deleted!\n",
1087 for (i = 0; i < MAP__NR_TYPES; ++i)
1088 symbols__delete(&dso->symbols[i]);
1090 if (dso->short_name_allocated) {
1091 zfree((char **)&dso->short_name);
1092 dso->short_name_allocated = false;
1095 if (dso->long_name_allocated) {
1096 zfree((char **)&dso->long_name);
1097 dso->long_name_allocated = false;
1100 dso__data_close(dso);
1101 auxtrace_cache__free(dso->auxtrace_cache);
1102 dso_cache__free(dso);
1104 zfree(&dso->symsrc_filename);
1105 pthread_mutex_destroy(&dso->lock);
1109 struct dso *dso__get(struct dso *dso)
1112 atomic_inc(&dso->refcnt);
1116 void dso__put(struct dso *dso)
1118 if (dso && atomic_dec_and_test(&dso->refcnt))
1122 void dso__set_build_id(struct dso *dso, void *build_id)
1124 memcpy(dso->build_id, build_id, sizeof(dso->build_id));
1125 dso->has_build_id = 1;
1128 bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
1130 return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
1133 void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
1135 char path[PATH_MAX];
1137 if (machine__is_default_guest(machine))
1139 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
1140 if (sysfs__read_build_id(path, dso->build_id,
1141 sizeof(dso->build_id)) == 0)
1142 dso->has_build_id = true;
1145 int dso__kernel_module_get_build_id(struct dso *dso,
1146 const char *root_dir)
1148 char filename[PATH_MAX];
1150 * kernel module short names are of the form "[module]" and
1151 * we need just "module" here.
1153 const char *name = dso->short_name + 1;
1155 snprintf(filename, sizeof(filename),
1156 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1157 root_dir, (int)strlen(name) - 1, name);
1159 if (sysfs__read_build_id(filename, dso->build_id,
1160 sizeof(dso->build_id)) == 0)
1161 dso->has_build_id = true;
1166 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1168 bool have_build_id = false;
1171 list_for_each_entry(pos, head, node) {
1172 if (with_hits && !pos->hit)
1174 if (pos->has_build_id) {
1175 have_build_id = true;
1178 if (filename__read_build_id(pos->long_name, pos->build_id,
1179 sizeof(pos->build_id)) > 0) {
1180 have_build_id = true;
1181 pos->has_build_id = true;
1185 return have_build_id;
1188 void __dsos__add(struct dsos *dsos, struct dso *dso)
1190 list_add_tail(&dso->node, &dsos->head);
1191 __dso__findlink_by_longname(&dsos->root, dso, NULL);
1193 * It is now in the linked list, grab a reference, then garbage collect
1194 * this when needing memory, by looking at LRU dso instances in the
1195 * list with atomic_read(&dso->refcnt) == 1, i.e. no references
1196 * anywhere besides the one for the list, do, under a lock for the
1197 * list: remove it from the list, then a dso__put(), that probably will
1198 * be the last and will then call dso__delete(), end of life.
1200 * That, or at the end of the 'struct machine' lifetime, when all
1201 * 'struct dso' instances will be removed from the list, in
1202 * dsos__exit(), if they have no other reference from some other data
1205 * E.g.: after processing a 'perf.data' file and storing references
1206 * to objects instantiated while processing events, we will have
1207 * references to the 'thread', 'map', 'dso' structs all from 'struct
1208 * hist_entry' instances, but we may not need anything not referenced,
1209 * so we might as well call machines__exit()/machines__delete() and
1210 * garbage collect it.
1215 void dsos__add(struct dsos *dsos, struct dso *dso)
1217 pthread_rwlock_wrlock(&dsos->lock);
1218 __dsos__add(dsos, dso);
1219 pthread_rwlock_unlock(&dsos->lock);
1222 struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
1227 list_for_each_entry(pos, &dsos->head, node)
1228 if (strcmp(pos->short_name, name) == 0)
1232 return __dso__find_by_longname(&dsos->root, name);
1235 struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
1238 pthread_rwlock_rdlock(&dsos->lock);
1239 dso = __dsos__find(dsos, name, cmp_short);
1240 pthread_rwlock_unlock(&dsos->lock);
1244 struct dso *__dsos__addnew(struct dsos *dsos, const char *name)
1246 struct dso *dso = dso__new(name);
1249 __dsos__add(dsos, dso);
1250 dso__set_basename(dso);
1251 /* Put dso here because __dsos_add already got it */
1257 struct dso *__dsos__findnew(struct dsos *dsos, const char *name)
1259 struct dso *dso = __dsos__find(dsos, name, false);
1261 return dso ? dso : __dsos__addnew(dsos, name);
1264 struct dso *dsos__findnew(struct dsos *dsos, const char *name)
1267 pthread_rwlock_wrlock(&dsos->lock);
1268 dso = dso__get(__dsos__findnew(dsos, name));
1269 pthread_rwlock_unlock(&dsos->lock);
1273 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
1274 bool (skip)(struct dso *dso, int parm), int parm)
1279 list_for_each_entry(pos, head, node) {
1280 if (skip && skip(pos, parm))
1282 ret += dso__fprintf_buildid(pos, fp);
1283 ret += fprintf(fp, " %s\n", pos->long_name);
1288 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
1293 list_for_each_entry(pos, head, node) {
1295 for (i = 0; i < MAP__NR_TYPES; ++i)
1296 ret += dso__fprintf(pos, i, fp);
1302 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
1304 char sbuild_id[SBUILD_ID_SIZE];
1306 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1307 return fprintf(fp, "%s", sbuild_id);
1310 size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
1313 size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
1315 if (dso->short_name != dso->long_name)
1316 ret += fprintf(fp, "%s, ", dso->long_name);
1317 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
1318 dso__loaded(dso, type) ? "" : "NOT ");
1319 ret += dso__fprintf_buildid(dso, fp);
1320 ret += fprintf(fp, ")\n");
1321 for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
1322 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
1323 ret += symbol__fprintf(pos, fp);
1329 enum dso_type dso__type(struct dso *dso, struct machine *machine)
1332 enum dso_type type = DSO__TYPE_UNKNOWN;
1334 fd = dso__data_get_fd(dso, machine);
1336 type = dso__type_fd(fd);
1337 dso__data_put_fd(dso);
1343 int dso__strerror_load(struct dso *dso, char *buf, size_t buflen)
1345 int idx, errnum = dso->load_errno;
1347 * This must have a same ordering as the enum dso_load_errno.
1349 static const char *dso_load__error_str[] = {
1350 "Internal tools/perf/ library error",
1352 "Can not read build id",
1353 "Mismatching build id",
1354 "Decompression failure",
1357 BUG_ON(buflen == 0);
1360 const char *err = strerror_r(errnum, buf, buflen);
1363 scnprintf(buf, buflen, "%s", err);
1368 if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END)
1371 idx = errnum - __DSO_LOAD_ERRNO__START;
1372 scnprintf(buf, buflen, "%s", dso_load__error_str[idx]);