3 #include <sys/resource.h>
12 char dso__symtab_origin(const struct dso *dso)
14 static const char origin[] = {
15 [DSO_BINARY_TYPE__KALLSYMS] = 'k',
16 [DSO_BINARY_TYPE__VMLINUX] = 'v',
17 [DSO_BINARY_TYPE__JAVA_JIT] = 'j',
18 [DSO_BINARY_TYPE__DEBUGLINK] = 'l',
19 [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B',
20 [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f',
21 [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u',
22 [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o',
23 [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b',
24 [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd',
25 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K',
26 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm',
27 [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g',
28 [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G',
29 [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M',
30 [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V',
33 if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
35 return origin[dso->symtab_type];
38 int dso__read_binary_type_filename(const struct dso *dso,
39 enum dso_binary_type type,
40 char *root_dir, char *filename, size_t size)
42 char build_id_hex[SBUILD_ID_SIZE];
47 case DSO_BINARY_TYPE__DEBUGLINK: {
50 len = __symbol__join_symfs(filename, size, dso->long_name);
51 debuglink = filename + len;
52 while (debuglink != filename && *debuglink != '/')
54 if (*debuglink == '/')
58 if (!is_regular_file(filename))
61 ret = filename__read_debuglink(filename, debuglink,
62 size - (debuglink - filename));
65 case DSO_BINARY_TYPE__BUILD_ID_CACHE:
66 if (dso__build_id_filename(dso, filename, size) == NULL)
70 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
71 len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
72 snprintf(filename + len, size - len, "%s.debug", dso->long_name);
75 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
76 len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
77 snprintf(filename + len, size - len, "%s", dso->long_name);
80 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
82 const char *last_slash;
85 last_slash = dso->long_name + dso->long_name_len;
86 while (last_slash != dso->long_name && *last_slash != '/')
89 len = __symbol__join_symfs(filename, size, "");
90 dir_size = last_slash - dso->long_name + 2;
91 if (dir_size > (size - len)) {
95 len += scnprintf(filename + len, dir_size, "%s", dso->long_name);
96 len += scnprintf(filename + len , size - len, ".debug%s",
101 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
102 if (!dso->has_build_id) {
107 build_id__sprintf(dso->build_id,
108 sizeof(dso->build_id),
110 len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/");
111 snprintf(filename + len, size - len, "%.2s/%s.debug",
112 build_id_hex, build_id_hex + 2);
115 case DSO_BINARY_TYPE__VMLINUX:
116 case DSO_BINARY_TYPE__GUEST_VMLINUX:
117 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
118 __symbol__join_symfs(filename, size, dso->long_name);
121 case DSO_BINARY_TYPE__GUEST_KMODULE:
122 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
123 path__join3(filename, size, symbol_conf.symfs,
124 root_dir, dso->long_name);
127 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
128 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
129 __symbol__join_symfs(filename, size, dso->long_name);
132 case DSO_BINARY_TYPE__KCORE:
133 case DSO_BINARY_TYPE__GUEST_KCORE:
134 snprintf(filename, size, "%s", dso->long_name);
138 case DSO_BINARY_TYPE__KALLSYMS:
139 case DSO_BINARY_TYPE__GUEST_KALLSYMS:
140 case DSO_BINARY_TYPE__JAVA_JIT:
141 case DSO_BINARY_TYPE__NOT_FOUND:
149 static const struct {
151 int (*decompress)(const char *input, int output);
153 #ifdef HAVE_ZLIB_SUPPORT
154 { "gz", gzip_decompress_to_file },
156 #ifdef HAVE_LZMA_SUPPORT
157 { "xz", lzma_decompress_to_file },
162 bool is_supported_compression(const char *ext)
166 for (i = 0; compressions[i].fmt; i++) {
167 if (!strcmp(ext, compressions[i].fmt))
173 bool is_kernel_module(const char *pathname, int cpumode)
176 int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK;
178 WARN_ONCE(mode != cpumode,
179 "Internal error: passing unmasked cpumode (%x) to is_kernel_module",
183 case PERF_RECORD_MISC_USER:
184 case PERF_RECORD_MISC_HYPERVISOR:
185 case PERF_RECORD_MISC_GUEST_USER:
187 /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */
189 if (kmod_path__parse(&m, pathname)) {
190 pr_err("Failed to check whether %s is a kernel module or not. Assume it is.",
199 bool decompress_to_file(const char *ext, const char *filename, int output_fd)
203 for (i = 0; compressions[i].fmt; i++) {
204 if (!strcmp(ext, compressions[i].fmt))
205 return !compressions[i].decompress(filename,
211 bool dso__needs_decompress(struct dso *dso)
213 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
214 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
218 * Parses kernel module specified in @path and updates
221 * @comp - true if @path contains supported compression suffix,
223 * @kmod - true if @path contains '.ko' suffix in right position,
225 * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name
226 * of the kernel module without suffixes, otherwise strudup-ed
228 * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string
229 * the compression suffix
231 * Returns 0 if there's no strdup error, -ENOMEM otherwise.
233 int __kmod_path__parse(struct kmod_path *m, const char *path,
234 bool alloc_name, bool alloc_ext)
236 const char *name = strrchr(path, '/');
237 const char *ext = strrchr(path, '.');
238 bool is_simple_name = false;
240 memset(m, 0x0, sizeof(*m));
241 name = name ? name + 1 : path;
244 * '.' is also a valid character for module name. For example:
245 * [aaa.bbb] is a valid module name. '[' should have higher
246 * priority than '.ko' suffix.
248 * The kernel names are from machine__mmap_name. Such
249 * name should belong to kernel itself, not kernel module.
251 if (name[0] == '[') {
252 is_simple_name = true;
253 if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) ||
254 (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) ||
255 (strncmp(name, "[vdso]", 6) == 0) ||
256 (strncmp(name, "[vsyscall]", 10) == 0)) {
263 /* No extension, just return name. */
264 if ((ext == NULL) || is_simple_name) {
266 m->name = strdup(name);
267 return m->name ? 0 : -ENOMEM;
272 if (is_supported_compression(ext + 1)) {
277 /* Check .ko extension only if there's enough name left. */
279 m->kmod = !strncmp(ext, ".ko", 3);
283 if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1)
286 if (asprintf(&m->name, "%s", name) == -1)
290 strxfrchar(m->name, '-', '_');
293 if (alloc_ext && m->comp) {
294 m->ext = strdup(ext + 4);
296 free((void *) m->name);
305 * Global list of open DSOs and the counter.
307 static LIST_HEAD(dso__data_open);
308 static long dso__data_open_cnt;
309 static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER;
311 static void dso__list_add(struct dso *dso)
313 list_add_tail(&dso->data.open_entry, &dso__data_open);
314 dso__data_open_cnt++;
317 static void dso__list_del(struct dso *dso)
319 list_del(&dso->data.open_entry);
320 WARN_ONCE(dso__data_open_cnt <= 0,
321 "DSO data fd counter out of bounds.");
322 dso__data_open_cnt--;
325 static void close_first_dso(void);
327 static int do_open(char *name)
330 char sbuf[STRERR_BUFSIZE];
333 fd = open(name, O_RDONLY);
337 pr_debug("dso open failed: %s\n",
338 str_error_r(errno, sbuf, sizeof(sbuf)));
339 if (!dso__data_open_cnt || errno != EMFILE)
348 static int __open_dso(struct dso *dso, struct machine *machine)
351 char *root_dir = (char *)"";
352 char *name = malloc(PATH_MAX);
358 root_dir = machine->root_dir;
360 if (dso__read_binary_type_filename(dso, dso->binary_type,
361 root_dir, name, PATH_MAX)) {
366 if (!is_regular_file(name))
374 static void check_data_close(void);
377 * dso_close - Open DSO data file
380 * Open @dso's data file descriptor and updates
381 * list/count of open DSO objects.
383 static int open_dso(struct dso *dso, struct machine *machine)
385 int fd = __open_dso(dso, machine);
390 * Check if we crossed the allowed number
391 * of opened DSOs and close one if needed.
399 static void close_data_fd(struct dso *dso)
401 if (dso->data.fd >= 0) {
404 dso->data.file_size = 0;
410 * dso_close - Close DSO data file
413 * Close @dso's data file descriptor and updates
414 * list/count of open DSO objects.
416 static void close_dso(struct dso *dso)
421 static void close_first_dso(void)
425 dso = list_first_entry(&dso__data_open, struct dso, data.open_entry);
429 static rlim_t get_fd_limit(void)
434 /* Allow half of the current open fd limit. */
435 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
436 if (l.rlim_cur == RLIM_INFINITY)
439 limit = l.rlim_cur / 2;
441 pr_err("failed to get fd limit\n");
448 static rlim_t fd_limit;
451 * Used only by tests/dso-data.c to reset the environment
452 * for tests. I dont expect we should change this during
455 void reset_fd_limit(void)
460 static bool may_cache_fd(void)
463 fd_limit = get_fd_limit();
465 if (fd_limit == RLIM_INFINITY)
468 return fd_limit > (rlim_t) dso__data_open_cnt;
472 * Check and close LRU dso if we crossed allowed limit
473 * for opened dso file descriptors. The limit is half
474 * of the RLIMIT_NOFILE files opened.
476 static void check_data_close(void)
478 bool cache_fd = may_cache_fd();
485 * dso__data_close - Close DSO data file
488 * External interface to close @dso's data file descriptor.
490 void dso__data_close(struct dso *dso)
492 pthread_mutex_lock(&dso__data_open_lock);
494 pthread_mutex_unlock(&dso__data_open_lock);
497 static void try_to_open_dso(struct dso *dso, struct machine *machine)
499 enum dso_binary_type binary_type_data[] = {
500 DSO_BINARY_TYPE__BUILD_ID_CACHE,
501 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
502 DSO_BINARY_TYPE__NOT_FOUND,
506 if (dso->data.fd >= 0)
509 if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
510 dso->data.fd = open_dso(dso, machine);
515 dso->binary_type = binary_type_data[i++];
517 dso->data.fd = open_dso(dso, machine);
518 if (dso->data.fd >= 0)
521 } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
523 if (dso->data.fd >= 0)
524 dso->data.status = DSO_DATA_STATUS_OK;
526 dso->data.status = DSO_DATA_STATUS_ERROR;
530 * dso__data_get_fd - Get dso's data file descriptor
532 * @machine: machine object
534 * External interface to find dso's file, open it and
535 * returns file descriptor. It should be paired with
536 * dso__data_put_fd() if it returns non-negative value.
538 int dso__data_get_fd(struct dso *dso, struct machine *machine)
540 if (dso->data.status == DSO_DATA_STATUS_ERROR)
543 if (pthread_mutex_lock(&dso__data_open_lock) < 0)
546 try_to_open_dso(dso, machine);
548 if (dso->data.fd < 0)
549 pthread_mutex_unlock(&dso__data_open_lock);
554 void dso__data_put_fd(struct dso *dso __maybe_unused)
556 pthread_mutex_unlock(&dso__data_open_lock);
559 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
563 if (dso->data.status_seen & flag)
566 dso->data.status_seen |= flag;
572 dso_cache__free(struct dso *dso)
574 struct rb_root *root = &dso->data.cache;
575 struct rb_node *next = rb_first(root);
577 pthread_mutex_lock(&dso->lock);
579 struct dso_cache *cache;
581 cache = rb_entry(next, struct dso_cache, rb_node);
582 next = rb_next(&cache->rb_node);
583 rb_erase(&cache->rb_node, root);
586 pthread_mutex_unlock(&dso->lock);
589 static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset)
591 const struct rb_root *root = &dso->data.cache;
592 struct rb_node * const *p = &root->rb_node;
593 const struct rb_node *parent = NULL;
594 struct dso_cache *cache;
600 cache = rb_entry(parent, struct dso_cache, rb_node);
601 end = cache->offset + DSO__DATA_CACHE_SIZE;
603 if (offset < cache->offset)
605 else if (offset >= end)
614 static struct dso_cache *
615 dso_cache__insert(struct dso *dso, struct dso_cache *new)
617 struct rb_root *root = &dso->data.cache;
618 struct rb_node **p = &root->rb_node;
619 struct rb_node *parent = NULL;
620 struct dso_cache *cache;
621 u64 offset = new->offset;
623 pthread_mutex_lock(&dso->lock);
628 cache = rb_entry(parent, struct dso_cache, rb_node);
629 end = cache->offset + DSO__DATA_CACHE_SIZE;
631 if (offset < cache->offset)
633 else if (offset >= end)
639 rb_link_node(&new->rb_node, parent, p);
640 rb_insert_color(&new->rb_node, root);
644 pthread_mutex_unlock(&dso->lock);
649 dso_cache__memcpy(struct dso_cache *cache, u64 offset,
652 u64 cache_offset = offset - cache->offset;
653 u64 cache_size = min(cache->size - cache_offset, size);
655 memcpy(data, cache->data + cache_offset, cache_size);
660 dso_cache__read(struct dso *dso, struct machine *machine,
661 u64 offset, u8 *data, ssize_t size)
663 struct dso_cache *cache;
664 struct dso_cache *old;
670 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
674 pthread_mutex_lock(&dso__data_open_lock);
677 * dso->data.fd might be closed if other thread opened another
678 * file (dso) due to open file limit (RLIMIT_NOFILE).
680 try_to_open_dso(dso, machine);
682 if (dso->data.fd < 0) {
684 dso->data.status = DSO_DATA_STATUS_ERROR;
688 cache_offset = offset & DSO__DATA_CACHE_MASK;
690 ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset);
694 cache->offset = cache_offset;
698 pthread_mutex_unlock(&dso__data_open_lock);
701 old = dso_cache__insert(dso, cache);
703 /* we lose the race */
708 ret = dso_cache__memcpy(cache, offset, data, size);
717 static ssize_t dso_cache_read(struct dso *dso, struct machine *machine,
718 u64 offset, u8 *data, ssize_t size)
720 struct dso_cache *cache;
722 cache = dso_cache__find(dso, offset);
724 return dso_cache__memcpy(cache, offset, data, size);
726 return dso_cache__read(dso, machine, offset, data, size);
730 * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks
731 * in the rb_tree. Any read to already cached data is served
734 static ssize_t cached_read(struct dso *dso, struct machine *machine,
735 u64 offset, u8 *data, ssize_t size)
743 ret = dso_cache_read(dso, machine, offset, p, size);
747 /* Reached EOF, return what we have. */
763 static int data_file_size(struct dso *dso, struct machine *machine)
767 char sbuf[STRERR_BUFSIZE];
769 if (dso->data.file_size)
772 if (dso->data.status == DSO_DATA_STATUS_ERROR)
775 pthread_mutex_lock(&dso__data_open_lock);
778 * dso->data.fd might be closed if other thread opened another
779 * file (dso) due to open file limit (RLIMIT_NOFILE).
781 try_to_open_dso(dso, machine);
783 if (dso->data.fd < 0) {
785 dso->data.status = DSO_DATA_STATUS_ERROR;
789 if (fstat(dso->data.fd, &st) < 0) {
791 pr_err("dso cache fstat failed: %s\n",
792 str_error_r(errno, sbuf, sizeof(sbuf)));
793 dso->data.status = DSO_DATA_STATUS_ERROR;
796 dso->data.file_size = st.st_size;
799 pthread_mutex_unlock(&dso__data_open_lock);
804 * dso__data_size - Return dso data size
806 * @machine: machine object
808 * Return: dso data size
810 off_t dso__data_size(struct dso *dso, struct machine *machine)
812 if (data_file_size(dso, machine))
815 /* For now just estimate dso data size is close to file size */
816 return dso->data.file_size;
819 static ssize_t data_read_offset(struct dso *dso, struct machine *machine,
820 u64 offset, u8 *data, ssize_t size)
822 if (data_file_size(dso, machine))
825 /* Check the offset sanity. */
826 if (offset > dso->data.file_size)
829 if (offset + size < offset)
832 return cached_read(dso, machine, offset, data, size);
836 * dso__data_read_offset - Read data from dso file offset
838 * @machine: machine object
839 * @offset: file offset
840 * @data: buffer to store data
841 * @size: size of the @data buffer
843 * External interface to read data from dso file offset. Open
844 * dso data file and use cached_read to get the data.
846 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
847 u64 offset, u8 *data, ssize_t size)
849 if (dso->data.status == DSO_DATA_STATUS_ERROR)
852 return data_read_offset(dso, machine, offset, data, size);
856 * dso__data_read_addr - Read data from dso address
858 * @machine: machine object
859 * @add: virtual memory address
860 * @data: buffer to store data
861 * @size: size of the @data buffer
863 * External interface to read data from dso address.
865 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
866 struct machine *machine, u64 addr,
867 u8 *data, ssize_t size)
869 u64 offset = map->map_ip(map, addr);
870 return dso__data_read_offset(dso, machine, offset, data, size);
873 struct map *dso__new_map(const char *name)
875 struct map *map = NULL;
876 struct dso *dso = dso__new(name);
879 map = map__new2(0, dso, MAP__FUNCTION);
884 struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
885 const char *short_name, int dso_type)
888 * The kernel dso could be created by build_id processing.
890 struct dso *dso = machine__findnew_dso(machine, name);
893 * We need to run this in all cases, since during the build_id
894 * processing we had no idea this was the kernel dso.
897 dso__set_short_name(dso, short_name, false);
898 dso->kernel = dso_type;
905 * Find a matching entry and/or link current entry to RB tree.
906 * Either one of the dso or name parameter must be non-NULL or the
907 * function will not work.
909 static struct dso *__dso__findlink_by_longname(struct rb_root *root,
910 struct dso *dso, const char *name)
912 struct rb_node **p = &root->rb_node;
913 struct rb_node *parent = NULL;
916 name = dso->long_name;
918 * Find node with the matching name
921 struct dso *this = rb_entry(*p, struct dso, rb_node);
922 int rc = strcmp(name, this->long_name);
927 * In case the new DSO is a duplicate of an existing
928 * one, print an one-time warning & put the new entry
929 * at the end of the list of duplicates.
931 if (!dso || (dso == this))
932 return this; /* Find matching dso */
934 * The core kernel DSOs may have duplicated long name.
935 * In this case, the short name should be different.
936 * Comparing the short names to differentiate the DSOs.
938 rc = strcmp(dso->short_name, this->short_name);
940 pr_err("Duplicated dso name: %s\n", name);
945 p = &parent->rb_left;
947 p = &parent->rb_right;
950 /* Add new node and rebalance tree */
951 rb_link_node(&dso->rb_node, parent, p);
952 rb_insert_color(&dso->rb_node, root);
958 static inline struct dso *__dso__find_by_longname(struct rb_root *root,
961 return __dso__findlink_by_longname(root, NULL, name);
964 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
966 struct rb_root *root = dso->root;
971 if (dso->long_name_allocated)
972 free((char *)dso->long_name);
975 rb_erase(&dso->rb_node, root);
977 * __dso__findlink_by_longname() isn't guaranteed to add it
978 * back, so a clean removal is required here.
980 RB_CLEAR_NODE(&dso->rb_node);
984 dso->long_name = name;
985 dso->long_name_len = strlen(name);
986 dso->long_name_allocated = name_allocated;
989 __dso__findlink_by_longname(root, dso, NULL);
992 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
997 if (dso->short_name_allocated)
998 free((char *)dso->short_name);
1000 dso->short_name = name;
1001 dso->short_name_len = strlen(name);
1002 dso->short_name_allocated = name_allocated;
1005 static void dso__set_basename(struct dso *dso)
1008 * basename() may modify path buffer, so we must pass
1011 char *base, *lname = strdup(dso->long_name);
1017 * basename() may return a pointer to internal
1018 * storage which is reused in subsequent calls
1019 * so copy the result.
1021 base = strdup(basename(lname));
1028 dso__set_short_name(dso, base, true);
1031 int dso__name_len(const struct dso *dso)
1034 return strlen("[unknown]");
1036 return dso->long_name_len;
1038 return dso->short_name_len;
1041 bool dso__loaded(const struct dso *dso, enum map_type type)
1043 return dso->loaded & (1 << type);
1046 bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
1048 return dso->sorted_by_name & (1 << type);
1051 void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
1053 dso->sorted_by_name |= (1 << type);
1056 struct dso *dso__new(const char *name)
1058 struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
1062 strcpy(dso->name, name);
1063 dso__set_long_name(dso, dso->name, false);
1064 dso__set_short_name(dso, dso->name, false);
1065 for (i = 0; i < MAP__NR_TYPES; ++i)
1066 dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
1067 dso->data.cache = RB_ROOT;
1069 dso->data.status = DSO_DATA_STATUS_UNKNOWN;
1070 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
1071 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
1072 dso->is_64_bit = (sizeof(void *) == 8);
1075 dso->sorted_by_name = 0;
1076 dso->has_build_id = 0;
1077 dso->has_srcline = 1;
1079 dso->kernel = DSO_TYPE_USER;
1080 dso->needs_swap = DSO_SWAP__UNSET;
1081 RB_CLEAR_NODE(&dso->rb_node);
1083 INIT_LIST_HEAD(&dso->node);
1084 INIT_LIST_HEAD(&dso->data.open_entry);
1085 pthread_mutex_init(&dso->lock, NULL);
1086 atomic_set(&dso->refcnt, 1);
1092 void dso__delete(struct dso *dso)
1096 if (!RB_EMPTY_NODE(&dso->rb_node))
1097 pr_err("DSO %s is still in rbtree when being deleted!\n",
1099 for (i = 0; i < MAP__NR_TYPES; ++i)
1100 symbols__delete(&dso->symbols[i]);
1102 if (dso->short_name_allocated) {
1103 zfree((char **)&dso->short_name);
1104 dso->short_name_allocated = false;
1107 if (dso->long_name_allocated) {
1108 zfree((char **)&dso->long_name);
1109 dso->long_name_allocated = false;
1112 dso__data_close(dso);
1113 auxtrace_cache__free(dso->auxtrace_cache);
1114 dso_cache__free(dso);
1116 zfree(&dso->symsrc_filename);
1117 pthread_mutex_destroy(&dso->lock);
1121 struct dso *dso__get(struct dso *dso)
1124 atomic_inc(&dso->refcnt);
1128 void dso__put(struct dso *dso)
1130 if (dso && atomic_dec_and_test(&dso->refcnt))
1134 void dso__set_build_id(struct dso *dso, void *build_id)
1136 memcpy(dso->build_id, build_id, sizeof(dso->build_id));
1137 dso->has_build_id = 1;
1140 bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
1142 return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
1145 void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
1147 char path[PATH_MAX];
1149 if (machine__is_default_guest(machine))
1151 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
1152 if (sysfs__read_build_id(path, dso->build_id,
1153 sizeof(dso->build_id)) == 0)
1154 dso->has_build_id = true;
1157 int dso__kernel_module_get_build_id(struct dso *dso,
1158 const char *root_dir)
1160 char filename[PATH_MAX];
1162 * kernel module short names are of the form "[module]" and
1163 * we need just "module" here.
1165 const char *name = dso->short_name + 1;
1167 snprintf(filename, sizeof(filename),
1168 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1169 root_dir, (int)strlen(name) - 1, name);
1171 if (sysfs__read_build_id(filename, dso->build_id,
1172 sizeof(dso->build_id)) == 0)
1173 dso->has_build_id = true;
1178 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1180 bool have_build_id = false;
1183 list_for_each_entry(pos, head, node) {
1184 if (with_hits && !pos->hit && !dso__is_vdso(pos))
1186 if (pos->has_build_id) {
1187 have_build_id = true;
1190 if (filename__read_build_id(pos->long_name, pos->build_id,
1191 sizeof(pos->build_id)) > 0) {
1192 have_build_id = true;
1193 pos->has_build_id = true;
1197 return have_build_id;
1200 void __dsos__add(struct dsos *dsos, struct dso *dso)
1202 list_add_tail(&dso->node, &dsos->head);
1203 __dso__findlink_by_longname(&dsos->root, dso, NULL);
1205 * It is now in the linked list, grab a reference, then garbage collect
1206 * this when needing memory, by looking at LRU dso instances in the
1207 * list with atomic_read(&dso->refcnt) == 1, i.e. no references
1208 * anywhere besides the one for the list, do, under a lock for the
1209 * list: remove it from the list, then a dso__put(), that probably will
1210 * be the last and will then call dso__delete(), end of life.
1212 * That, or at the end of the 'struct machine' lifetime, when all
1213 * 'struct dso' instances will be removed from the list, in
1214 * dsos__exit(), if they have no other reference from some other data
1217 * E.g.: after processing a 'perf.data' file and storing references
1218 * to objects instantiated while processing events, we will have
1219 * references to the 'thread', 'map', 'dso' structs all from 'struct
1220 * hist_entry' instances, but we may not need anything not referenced,
1221 * so we might as well call machines__exit()/machines__delete() and
1222 * garbage collect it.
1227 void dsos__add(struct dsos *dsos, struct dso *dso)
1229 pthread_rwlock_wrlock(&dsos->lock);
1230 __dsos__add(dsos, dso);
1231 pthread_rwlock_unlock(&dsos->lock);
1234 struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
1239 list_for_each_entry(pos, &dsos->head, node)
1240 if (strcmp(pos->short_name, name) == 0)
1244 return __dso__find_by_longname(&dsos->root, name);
1247 struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
1250 pthread_rwlock_rdlock(&dsos->lock);
1251 dso = __dsos__find(dsos, name, cmp_short);
1252 pthread_rwlock_unlock(&dsos->lock);
1256 struct dso *__dsos__addnew(struct dsos *dsos, const char *name)
1258 struct dso *dso = dso__new(name);
1261 __dsos__add(dsos, dso);
1262 dso__set_basename(dso);
1263 /* Put dso here because __dsos_add already got it */
1269 struct dso *__dsos__findnew(struct dsos *dsos, const char *name)
1271 struct dso *dso = __dsos__find(dsos, name, false);
1273 return dso ? dso : __dsos__addnew(dsos, name);
1276 struct dso *dsos__findnew(struct dsos *dsos, const char *name)
1279 pthread_rwlock_wrlock(&dsos->lock);
1280 dso = dso__get(__dsos__findnew(dsos, name));
1281 pthread_rwlock_unlock(&dsos->lock);
1285 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
1286 bool (skip)(struct dso *dso, int parm), int parm)
1291 list_for_each_entry(pos, head, node) {
1292 if (skip && skip(pos, parm))
1294 ret += dso__fprintf_buildid(pos, fp);
1295 ret += fprintf(fp, " %s\n", pos->long_name);
1300 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
1305 list_for_each_entry(pos, head, node) {
1307 for (i = 0; i < MAP__NR_TYPES; ++i)
1308 ret += dso__fprintf(pos, i, fp);
1314 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
1316 char sbuild_id[SBUILD_ID_SIZE];
1318 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1319 return fprintf(fp, "%s", sbuild_id);
1322 size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
1325 size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
1327 if (dso->short_name != dso->long_name)
1328 ret += fprintf(fp, "%s, ", dso->long_name);
1329 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
1330 dso__loaded(dso, type) ? "" : "NOT ");
1331 ret += dso__fprintf_buildid(dso, fp);
1332 ret += fprintf(fp, ")\n");
1333 for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
1334 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
1335 ret += symbol__fprintf(pos, fp);
1341 enum dso_type dso__type(struct dso *dso, struct machine *machine)
1344 enum dso_type type = DSO__TYPE_UNKNOWN;
1346 fd = dso__data_get_fd(dso, machine);
1348 type = dso__type_fd(fd);
1349 dso__data_put_fd(dso);
1355 int dso__strerror_load(struct dso *dso, char *buf, size_t buflen)
1357 int idx, errnum = dso->load_errno;
1359 * This must have a same ordering as the enum dso_load_errno.
1361 static const char *dso_load__error_str[] = {
1362 "Internal tools/perf/ library error",
1364 "Can not read build id",
1365 "Mismatching build id",
1366 "Decompression failure",
1369 BUG_ON(buflen == 0);
1372 const char *err = str_error_r(errnum, buf, buflen);
1375 scnprintf(buf, buflen, "%s", err);
1380 if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END)
1383 idx = errnum - __DSO_LOAD_ERRNO__START;
1384 scnprintf(buf, buflen, "%s", dso_load__error_str[idx]);