2 #include <linux/kernel.h>
4 #include <sys/resource.h>
20 static const char * const debuglink_paths[] = {
27 char dso__symtab_origin(const struct dso *dso)
29 static const char origin[] = {
30 [DSO_BINARY_TYPE__KALLSYMS] = 'k',
31 [DSO_BINARY_TYPE__VMLINUX] = 'v',
32 [DSO_BINARY_TYPE__JAVA_JIT] = 'j',
33 [DSO_BINARY_TYPE__DEBUGLINK] = 'l',
34 [DSO_BINARY_TYPE__BUILD_ID_CACHE] = 'B',
35 [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f',
36 [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u',
37 [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o',
38 [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b',
39 [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd',
40 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE] = 'K',
41 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP] = 'm',
42 [DSO_BINARY_TYPE__GUEST_KALLSYMS] = 'g',
43 [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G',
44 [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M',
45 [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V',
48 if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
50 return origin[dso->symtab_type];
53 int dso__read_binary_type_filename(const struct dso *dso,
54 enum dso_binary_type type,
55 char *root_dir, char *filename, size_t size)
57 char build_id_hex[SBUILD_ID_SIZE];
62 case DSO_BINARY_TYPE__DEBUGLINK:
64 const char *last_slash;
65 char dso_dir[PATH_MAX];
66 char symfile[PATH_MAX];
69 len = __symbol__join_symfs(filename, size, dso->long_name);
70 last_slash = filename + len;
71 while (last_slash != filename && *last_slash != '/')
74 strncpy(dso_dir, filename, last_slash - filename);
75 dso_dir[last_slash-filename] = '\0';
77 if (!is_regular_file(filename)) {
82 ret = filename__read_debuglink(filename, symfile, PATH_MAX);
86 /* Check predefined locations where debug file might reside */
88 for (i = 0; i < ARRAY_SIZE(debuglink_paths); i++) {
89 snprintf(filename, size,
90 debuglink_paths[i], dso_dir, symfile);
91 if (is_regular_file(filename)) {
99 case DSO_BINARY_TYPE__BUILD_ID_CACHE:
100 if (dso__build_id_filename(dso, filename, size) == NULL)
104 case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
105 len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
106 snprintf(filename + len, size - len, "%s.debug", dso->long_name);
109 case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
110 len = __symbol__join_symfs(filename, size, "/usr/lib/debug");
111 snprintf(filename + len, size - len, "%s", dso->long_name);
114 case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
116 const char *last_slash;
119 last_slash = dso->long_name + dso->long_name_len;
120 while (last_slash != dso->long_name && *last_slash != '/')
123 len = __symbol__join_symfs(filename, size, "");
124 dir_size = last_slash - dso->long_name + 2;
125 if (dir_size > (size - len)) {
129 len += scnprintf(filename + len, dir_size, "%s", dso->long_name);
130 len += scnprintf(filename + len , size - len, ".debug%s",
135 case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
136 if (!dso->has_build_id) {
141 build_id__sprintf(dso->build_id,
142 sizeof(dso->build_id),
144 len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/");
145 snprintf(filename + len, size - len, "%.2s/%s.debug",
146 build_id_hex, build_id_hex + 2);
149 case DSO_BINARY_TYPE__VMLINUX:
150 case DSO_BINARY_TYPE__GUEST_VMLINUX:
151 case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
152 __symbol__join_symfs(filename, size, dso->long_name);
155 case DSO_BINARY_TYPE__GUEST_KMODULE:
156 case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
157 path__join3(filename, size, symbol_conf.symfs,
158 root_dir, dso->long_name);
161 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
162 case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
163 __symbol__join_symfs(filename, size, dso->long_name);
166 case DSO_BINARY_TYPE__KCORE:
167 case DSO_BINARY_TYPE__GUEST_KCORE:
168 snprintf(filename, size, "%s", dso->long_name);
172 case DSO_BINARY_TYPE__KALLSYMS:
173 case DSO_BINARY_TYPE__GUEST_KALLSYMS:
174 case DSO_BINARY_TYPE__JAVA_JIT:
175 case DSO_BINARY_TYPE__NOT_FOUND:
183 static const struct {
185 int (*decompress)(const char *input, int output);
187 #ifdef HAVE_ZLIB_SUPPORT
188 { "gz", gzip_decompress_to_file },
190 #ifdef HAVE_LZMA_SUPPORT
191 { "xz", lzma_decompress_to_file },
196 bool is_supported_compression(const char *ext)
200 for (i = 0; compressions[i].fmt; i++) {
201 if (!strcmp(ext, compressions[i].fmt))
207 bool is_kernel_module(const char *pathname, int cpumode)
210 int mode = cpumode & PERF_RECORD_MISC_CPUMODE_MASK;
212 WARN_ONCE(mode != cpumode,
213 "Internal error: passing unmasked cpumode (%x) to is_kernel_module",
217 case PERF_RECORD_MISC_USER:
218 case PERF_RECORD_MISC_HYPERVISOR:
219 case PERF_RECORD_MISC_GUEST_USER:
221 /* Treat PERF_RECORD_MISC_CPUMODE_UNKNOWN as kernel */
223 if (kmod_path__parse(&m, pathname)) {
224 pr_err("Failed to check whether %s is a kernel module or not. Assume it is.",
233 bool decompress_to_file(const char *ext, const char *filename, int output_fd)
237 for (i = 0; compressions[i].fmt; i++) {
238 if (!strcmp(ext, compressions[i].fmt))
239 return !compressions[i].decompress(filename,
245 bool dso__needs_decompress(struct dso *dso)
247 return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
248 dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
251 static int decompress_kmodule(struct dso *dso, const char *name, char *tmpbuf)
256 if (!dso__needs_decompress(dso))
259 if (kmod_path__parse_ext(&m, dso->long_name))
265 fd = mkstemp(tmpbuf);
267 dso->load_errno = errno;
271 if (!decompress_to_file(m.ext, name, fd)) {
272 dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE;
282 int dso__decompress_kmodule_fd(struct dso *dso, const char *name)
284 char tmpbuf[] = KMOD_DECOMP_NAME;
287 fd = decompress_kmodule(dso, name, tmpbuf);
292 int dso__decompress_kmodule_path(struct dso *dso, const char *name,
293 char *pathname, size_t len)
295 char tmpbuf[] = KMOD_DECOMP_NAME;
298 fd = decompress_kmodule(dso, name, tmpbuf);
304 strncpy(pathname, tmpbuf, len);
310 * Parses kernel module specified in @path and updates
313 * @comp - true if @path contains supported compression suffix,
315 * @kmod - true if @path contains '.ko' suffix in right position,
317 * @name - if (@alloc_name && @kmod) is true, it contains strdup-ed base name
318 * of the kernel module without suffixes, otherwise strudup-ed
320 * @ext - if (@alloc_ext && @comp) is true, it contains strdup-ed string
321 * the compression suffix
323 * Returns 0 if there's no strdup error, -ENOMEM otherwise.
325 int __kmod_path__parse(struct kmod_path *m, const char *path,
326 bool alloc_name, bool alloc_ext)
328 const char *name = strrchr(path, '/');
329 const char *ext = strrchr(path, '.');
330 bool is_simple_name = false;
332 memset(m, 0x0, sizeof(*m));
333 name = name ? name + 1 : path;
336 * '.' is also a valid character for module name. For example:
337 * [aaa.bbb] is a valid module name. '[' should have higher
338 * priority than '.ko' suffix.
340 * The kernel names are from machine__mmap_name. Such
341 * name should belong to kernel itself, not kernel module.
343 if (name[0] == '[') {
344 is_simple_name = true;
345 if ((strncmp(name, "[kernel.kallsyms]", 17) == 0) ||
346 (strncmp(name, "[guest.kernel.kallsyms", 22) == 0) ||
347 (strncmp(name, "[vdso]", 6) == 0) ||
348 (strncmp(name, "[vsyscall]", 10) == 0)) {
355 /* No extension, just return name. */
356 if ((ext == NULL) || is_simple_name) {
358 m->name = strdup(name);
359 return m->name ? 0 : -ENOMEM;
364 if (is_supported_compression(ext + 1)) {
369 /* Check .ko extension only if there's enough name left. */
371 m->kmod = !strncmp(ext, ".ko", 3);
375 if (asprintf(&m->name, "[%.*s]", (int) (ext - name), name) == -1)
378 if (asprintf(&m->name, "%s", name) == -1)
382 strxfrchar(m->name, '-', '_');
385 if (alloc_ext && m->comp) {
386 m->ext = strdup(ext + 4);
388 free((void *) m->name);
396 void dso__set_module_info(struct dso *dso, struct kmod_path *m,
397 struct machine *machine)
399 if (machine__is_host(machine))
400 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
402 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
404 /* _KMODULE_COMP should be next to _KMODULE */
405 if (m->kmod && m->comp)
408 dso__set_short_name(dso, strdup(m->name), true);
412 * Global list of open DSOs and the counter.
414 static LIST_HEAD(dso__data_open);
415 static long dso__data_open_cnt;
416 static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER;
418 static void dso__list_add(struct dso *dso)
420 list_add_tail(&dso->data.open_entry, &dso__data_open);
421 dso__data_open_cnt++;
424 static void dso__list_del(struct dso *dso)
426 list_del(&dso->data.open_entry);
427 WARN_ONCE(dso__data_open_cnt <= 0,
428 "DSO data fd counter out of bounds.");
429 dso__data_open_cnt--;
432 static void close_first_dso(void);
434 static int do_open(char *name)
437 char sbuf[STRERR_BUFSIZE];
440 fd = open(name, O_RDONLY);
444 pr_debug("dso open failed: %s\n",
445 str_error_r(errno, sbuf, sizeof(sbuf)));
446 if (!dso__data_open_cnt || errno != EMFILE)
455 static int __open_dso(struct dso *dso, struct machine *machine)
458 char *root_dir = (char *)"";
459 char *name = malloc(PATH_MAX);
465 root_dir = machine->root_dir;
467 if (dso__read_binary_type_filename(dso, dso->binary_type,
468 root_dir, name, PATH_MAX)) {
473 if (!is_regular_file(name)) {
483 static void check_data_close(void);
486 * dso_close - Open DSO data file
489 * Open @dso's data file descriptor and updates
490 * list/count of open DSO objects.
492 static int open_dso(struct dso *dso, struct machine *machine)
494 int fd = __open_dso(dso, machine);
499 * Check if we crossed the allowed number
500 * of opened DSOs and close one if needed.
508 static void close_data_fd(struct dso *dso)
510 if (dso->data.fd >= 0) {
513 dso->data.file_size = 0;
519 * dso_close - Close DSO data file
522 * Close @dso's data file descriptor and updates
523 * list/count of open DSO objects.
525 static void close_dso(struct dso *dso)
530 static void close_first_dso(void)
534 dso = list_first_entry(&dso__data_open, struct dso, data.open_entry);
538 static rlim_t get_fd_limit(void)
543 /* Allow half of the current open fd limit. */
544 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
545 if (l.rlim_cur == RLIM_INFINITY)
548 limit = l.rlim_cur / 2;
550 pr_err("failed to get fd limit\n");
557 static rlim_t fd_limit;
560 * Used only by tests/dso-data.c to reset the environment
561 * for tests. I dont expect we should change this during
564 void reset_fd_limit(void)
569 static bool may_cache_fd(void)
572 fd_limit = get_fd_limit();
574 if (fd_limit == RLIM_INFINITY)
577 return fd_limit > (rlim_t) dso__data_open_cnt;
581 * Check and close LRU dso if we crossed allowed limit
582 * for opened dso file descriptors. The limit is half
583 * of the RLIMIT_NOFILE files opened.
585 static void check_data_close(void)
587 bool cache_fd = may_cache_fd();
594 * dso__data_close - Close DSO data file
597 * External interface to close @dso's data file descriptor.
599 void dso__data_close(struct dso *dso)
601 pthread_mutex_lock(&dso__data_open_lock);
603 pthread_mutex_unlock(&dso__data_open_lock);
606 static void try_to_open_dso(struct dso *dso, struct machine *machine)
608 enum dso_binary_type binary_type_data[] = {
609 DSO_BINARY_TYPE__BUILD_ID_CACHE,
610 DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
611 DSO_BINARY_TYPE__NOT_FOUND,
615 if (dso->data.fd >= 0)
618 if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) {
619 dso->data.fd = open_dso(dso, machine);
624 dso->binary_type = binary_type_data[i++];
626 dso->data.fd = open_dso(dso, machine);
627 if (dso->data.fd >= 0)
630 } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND);
632 if (dso->data.fd >= 0)
633 dso->data.status = DSO_DATA_STATUS_OK;
635 dso->data.status = DSO_DATA_STATUS_ERROR;
639 * dso__data_get_fd - Get dso's data file descriptor
641 * @machine: machine object
643 * External interface to find dso's file, open it and
644 * returns file descriptor. It should be paired with
645 * dso__data_put_fd() if it returns non-negative value.
647 int dso__data_get_fd(struct dso *dso, struct machine *machine)
649 if (dso->data.status == DSO_DATA_STATUS_ERROR)
652 if (pthread_mutex_lock(&dso__data_open_lock) < 0)
655 try_to_open_dso(dso, machine);
657 if (dso->data.fd < 0)
658 pthread_mutex_unlock(&dso__data_open_lock);
663 void dso__data_put_fd(struct dso *dso __maybe_unused)
665 pthread_mutex_unlock(&dso__data_open_lock);
668 bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by)
672 if (dso->data.status_seen & flag)
675 dso->data.status_seen |= flag;
681 dso_cache__free(struct dso *dso)
683 struct rb_root *root = &dso->data.cache;
684 struct rb_node *next = rb_first(root);
686 pthread_mutex_lock(&dso->lock);
688 struct dso_cache *cache;
690 cache = rb_entry(next, struct dso_cache, rb_node);
691 next = rb_next(&cache->rb_node);
692 rb_erase(&cache->rb_node, root);
695 pthread_mutex_unlock(&dso->lock);
698 static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset)
700 const struct rb_root *root = &dso->data.cache;
701 struct rb_node * const *p = &root->rb_node;
702 const struct rb_node *parent = NULL;
703 struct dso_cache *cache;
709 cache = rb_entry(parent, struct dso_cache, rb_node);
710 end = cache->offset + DSO__DATA_CACHE_SIZE;
712 if (offset < cache->offset)
714 else if (offset >= end)
723 static struct dso_cache *
724 dso_cache__insert(struct dso *dso, struct dso_cache *new)
726 struct rb_root *root = &dso->data.cache;
727 struct rb_node **p = &root->rb_node;
728 struct rb_node *parent = NULL;
729 struct dso_cache *cache;
730 u64 offset = new->offset;
732 pthread_mutex_lock(&dso->lock);
737 cache = rb_entry(parent, struct dso_cache, rb_node);
738 end = cache->offset + DSO__DATA_CACHE_SIZE;
740 if (offset < cache->offset)
742 else if (offset >= end)
748 rb_link_node(&new->rb_node, parent, p);
749 rb_insert_color(&new->rb_node, root);
753 pthread_mutex_unlock(&dso->lock);
758 dso_cache__memcpy(struct dso_cache *cache, u64 offset,
761 u64 cache_offset = offset - cache->offset;
762 u64 cache_size = min(cache->size - cache_offset, size);
764 memcpy(data, cache->data + cache_offset, cache_size);
769 dso_cache__read(struct dso *dso, struct machine *machine,
770 u64 offset, u8 *data, ssize_t size)
772 struct dso_cache *cache;
773 struct dso_cache *old;
779 cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE);
783 pthread_mutex_lock(&dso__data_open_lock);
786 * dso->data.fd might be closed if other thread opened another
787 * file (dso) due to open file limit (RLIMIT_NOFILE).
789 try_to_open_dso(dso, machine);
791 if (dso->data.fd < 0) {
793 dso->data.status = DSO_DATA_STATUS_ERROR;
797 cache_offset = offset & DSO__DATA_CACHE_MASK;
799 ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset);
803 cache->offset = cache_offset;
807 pthread_mutex_unlock(&dso__data_open_lock);
810 old = dso_cache__insert(dso, cache);
812 /* we lose the race */
817 ret = dso_cache__memcpy(cache, offset, data, size);
826 static ssize_t dso_cache_read(struct dso *dso, struct machine *machine,
827 u64 offset, u8 *data, ssize_t size)
829 struct dso_cache *cache;
831 cache = dso_cache__find(dso, offset);
833 return dso_cache__memcpy(cache, offset, data, size);
835 return dso_cache__read(dso, machine, offset, data, size);
839 * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks
840 * in the rb_tree. Any read to already cached data is served
843 static ssize_t cached_read(struct dso *dso, struct machine *machine,
844 u64 offset, u8 *data, ssize_t size)
852 ret = dso_cache_read(dso, machine, offset, p, size);
856 /* Reached EOF, return what we have. */
872 static int data_file_size(struct dso *dso, struct machine *machine)
876 char sbuf[STRERR_BUFSIZE];
878 if (dso->data.file_size)
881 if (dso->data.status == DSO_DATA_STATUS_ERROR)
884 pthread_mutex_lock(&dso__data_open_lock);
887 * dso->data.fd might be closed if other thread opened another
888 * file (dso) due to open file limit (RLIMIT_NOFILE).
890 try_to_open_dso(dso, machine);
892 if (dso->data.fd < 0) {
894 dso->data.status = DSO_DATA_STATUS_ERROR;
898 if (fstat(dso->data.fd, &st) < 0) {
900 pr_err("dso cache fstat failed: %s\n",
901 str_error_r(errno, sbuf, sizeof(sbuf)));
902 dso->data.status = DSO_DATA_STATUS_ERROR;
905 dso->data.file_size = st.st_size;
908 pthread_mutex_unlock(&dso__data_open_lock);
913 * dso__data_size - Return dso data size
915 * @machine: machine object
917 * Return: dso data size
919 off_t dso__data_size(struct dso *dso, struct machine *machine)
921 if (data_file_size(dso, machine))
924 /* For now just estimate dso data size is close to file size */
925 return dso->data.file_size;
928 static ssize_t data_read_offset(struct dso *dso, struct machine *machine,
929 u64 offset, u8 *data, ssize_t size)
931 if (data_file_size(dso, machine))
934 /* Check the offset sanity. */
935 if (offset > dso->data.file_size)
938 if (offset + size < offset)
941 return cached_read(dso, machine, offset, data, size);
945 * dso__data_read_offset - Read data from dso file offset
947 * @machine: machine object
948 * @offset: file offset
949 * @data: buffer to store data
950 * @size: size of the @data buffer
952 * External interface to read data from dso file offset. Open
953 * dso data file and use cached_read to get the data.
955 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
956 u64 offset, u8 *data, ssize_t size)
958 if (dso->data.status == DSO_DATA_STATUS_ERROR)
961 return data_read_offset(dso, machine, offset, data, size);
965 * dso__data_read_addr - Read data from dso address
967 * @machine: machine object
968 * @add: virtual memory address
969 * @data: buffer to store data
970 * @size: size of the @data buffer
972 * External interface to read data from dso address.
974 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
975 struct machine *machine, u64 addr,
976 u8 *data, ssize_t size)
978 u64 offset = map->map_ip(map, addr);
979 return dso__data_read_offset(dso, machine, offset, data, size);
982 struct map *dso__new_map(const char *name)
984 struct map *map = NULL;
985 struct dso *dso = dso__new(name);
988 map = map__new2(0, dso, MAP__FUNCTION);
993 struct dso *machine__findnew_kernel(struct machine *machine, const char *name,
994 const char *short_name, int dso_type)
997 * The kernel dso could be created by build_id processing.
999 struct dso *dso = machine__findnew_dso(machine, name);
1002 * We need to run this in all cases, since during the build_id
1003 * processing we had no idea this was the kernel dso.
1006 dso__set_short_name(dso, short_name, false);
1007 dso->kernel = dso_type;
1014 * Find a matching entry and/or link current entry to RB tree.
1015 * Either one of the dso or name parameter must be non-NULL or the
1016 * function will not work.
1018 static struct dso *__dso__findlink_by_longname(struct rb_root *root,
1019 struct dso *dso, const char *name)
1021 struct rb_node **p = &root->rb_node;
1022 struct rb_node *parent = NULL;
1025 name = dso->long_name;
1027 * Find node with the matching name
1030 struct dso *this = rb_entry(*p, struct dso, rb_node);
1031 int rc = strcmp(name, this->long_name);
1036 * In case the new DSO is a duplicate of an existing
1037 * one, print a one-time warning & put the new entry
1038 * at the end of the list of duplicates.
1040 if (!dso || (dso == this))
1041 return this; /* Find matching dso */
1043 * The core kernel DSOs may have duplicated long name.
1044 * In this case, the short name should be different.
1045 * Comparing the short names to differentiate the DSOs.
1047 rc = strcmp(dso->short_name, this->short_name);
1049 pr_err("Duplicated dso name: %s\n", name);
1054 p = &parent->rb_left;
1056 p = &parent->rb_right;
1059 /* Add new node and rebalance tree */
1060 rb_link_node(&dso->rb_node, parent, p);
1061 rb_insert_color(&dso->rb_node, root);
1067 static inline struct dso *__dso__find_by_longname(struct rb_root *root,
1070 return __dso__findlink_by_longname(root, NULL, name);
1073 void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated)
1075 struct rb_root *root = dso->root;
1080 if (dso->long_name_allocated)
1081 free((char *)dso->long_name);
1084 rb_erase(&dso->rb_node, root);
1086 * __dso__findlink_by_longname() isn't guaranteed to add it
1087 * back, so a clean removal is required here.
1089 RB_CLEAR_NODE(&dso->rb_node);
1093 dso->long_name = name;
1094 dso->long_name_len = strlen(name);
1095 dso->long_name_allocated = name_allocated;
1098 __dso__findlink_by_longname(root, dso, NULL);
1101 void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated)
1106 if (dso->short_name_allocated)
1107 free((char *)dso->short_name);
1109 dso->short_name = name;
1110 dso->short_name_len = strlen(name);
1111 dso->short_name_allocated = name_allocated;
1114 static void dso__set_basename(struct dso *dso)
1117 * basename() may modify path buffer, so we must pass
1120 char *base, *lname = strdup(dso->long_name);
1126 * basename() may return a pointer to internal
1127 * storage which is reused in subsequent calls
1128 * so copy the result.
1130 base = strdup(basename(lname));
1137 dso__set_short_name(dso, base, true);
1140 int dso__name_len(const struct dso *dso)
1143 return strlen("[unknown]");
1145 return dso->long_name_len;
1147 return dso->short_name_len;
1150 bool dso__loaded(const struct dso *dso, enum map_type type)
1152 return dso->loaded & (1 << type);
1155 bool dso__sorted_by_name(const struct dso *dso, enum map_type type)
1157 return dso->sorted_by_name & (1 << type);
1160 void dso__set_sorted_by_name(struct dso *dso, enum map_type type)
1162 dso->sorted_by_name |= (1 << type);
1165 struct dso *dso__new(const char *name)
1167 struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1);
1171 strcpy(dso->name, name);
1172 dso__set_long_name(dso, dso->name, false);
1173 dso__set_short_name(dso, dso->name, false);
1174 for (i = 0; i < MAP__NR_TYPES; ++i)
1175 dso->symbols[i] = dso->symbol_names[i] = RB_ROOT;
1176 dso->data.cache = RB_ROOT;
1178 dso->data.status = DSO_DATA_STATUS_UNKNOWN;
1179 dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND;
1180 dso->binary_type = DSO_BINARY_TYPE__NOT_FOUND;
1181 dso->is_64_bit = (sizeof(void *) == 8);
1184 dso->sorted_by_name = 0;
1185 dso->has_build_id = 0;
1186 dso->has_srcline = 1;
1188 dso->kernel = DSO_TYPE_USER;
1189 dso->needs_swap = DSO_SWAP__UNSET;
1190 RB_CLEAR_NODE(&dso->rb_node);
1192 INIT_LIST_HEAD(&dso->node);
1193 INIT_LIST_HEAD(&dso->data.open_entry);
1194 pthread_mutex_init(&dso->lock, NULL);
1195 refcount_set(&dso->refcnt, 1);
1201 void dso__delete(struct dso *dso)
1205 if (!RB_EMPTY_NODE(&dso->rb_node))
1206 pr_err("DSO %s is still in rbtree when being deleted!\n",
1208 for (i = 0; i < MAP__NR_TYPES; ++i)
1209 symbols__delete(&dso->symbols[i]);
1211 if (dso->short_name_allocated) {
1212 zfree((char **)&dso->short_name);
1213 dso->short_name_allocated = false;
1216 if (dso->long_name_allocated) {
1217 zfree((char **)&dso->long_name);
1218 dso->long_name_allocated = false;
1221 dso__data_close(dso);
1222 auxtrace_cache__free(dso->auxtrace_cache);
1223 dso_cache__free(dso);
1225 zfree(&dso->symsrc_filename);
1226 pthread_mutex_destroy(&dso->lock);
1230 struct dso *dso__get(struct dso *dso)
1233 refcount_inc(&dso->refcnt);
1237 void dso__put(struct dso *dso)
1239 if (dso && refcount_dec_and_test(&dso->refcnt))
1243 void dso__set_build_id(struct dso *dso, void *build_id)
1245 memcpy(dso->build_id, build_id, sizeof(dso->build_id));
1246 dso->has_build_id = 1;
1249 bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
1251 return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
1254 void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
1256 char path[PATH_MAX];
1258 if (machine__is_default_guest(machine))
1260 sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
1261 if (sysfs__read_build_id(path, dso->build_id,
1262 sizeof(dso->build_id)) == 0)
1263 dso->has_build_id = true;
1266 int dso__kernel_module_get_build_id(struct dso *dso,
1267 const char *root_dir)
1269 char filename[PATH_MAX];
1271 * kernel module short names are of the form "[module]" and
1272 * we need just "module" here.
1274 const char *name = dso->short_name + 1;
1276 snprintf(filename, sizeof(filename),
1277 "%s/sys/module/%.*s/notes/.note.gnu.build-id",
1278 root_dir, (int)strlen(name) - 1, name);
1280 if (sysfs__read_build_id(filename, dso->build_id,
1281 sizeof(dso->build_id)) == 0)
1282 dso->has_build_id = true;
1287 bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
1289 bool have_build_id = false;
1292 list_for_each_entry(pos, head, node) {
1293 if (with_hits && !pos->hit && !dso__is_vdso(pos))
1295 if (pos->has_build_id) {
1296 have_build_id = true;
1299 if (filename__read_build_id(pos->long_name, pos->build_id,
1300 sizeof(pos->build_id)) > 0) {
1301 have_build_id = true;
1302 pos->has_build_id = true;
1306 return have_build_id;
1309 void __dsos__add(struct dsos *dsos, struct dso *dso)
1311 list_add_tail(&dso->node, &dsos->head);
1312 __dso__findlink_by_longname(&dsos->root, dso, NULL);
1314 * It is now in the linked list, grab a reference, then garbage collect
1315 * this when needing memory, by looking at LRU dso instances in the
1316 * list with atomic_read(&dso->refcnt) == 1, i.e. no references
1317 * anywhere besides the one for the list, do, under a lock for the
1318 * list: remove it from the list, then a dso__put(), that probably will
1319 * be the last and will then call dso__delete(), end of life.
1321 * That, or at the end of the 'struct machine' lifetime, when all
1322 * 'struct dso' instances will be removed from the list, in
1323 * dsos__exit(), if they have no other reference from some other data
1326 * E.g.: after processing a 'perf.data' file and storing references
1327 * to objects instantiated while processing events, we will have
1328 * references to the 'thread', 'map', 'dso' structs all from 'struct
1329 * hist_entry' instances, but we may not need anything not referenced,
1330 * so we might as well call machines__exit()/machines__delete() and
1331 * garbage collect it.
1336 void dsos__add(struct dsos *dsos, struct dso *dso)
1338 pthread_rwlock_wrlock(&dsos->lock);
1339 __dsos__add(dsos, dso);
1340 pthread_rwlock_unlock(&dsos->lock);
1343 struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
1348 list_for_each_entry(pos, &dsos->head, node)
1349 if (strcmp(pos->short_name, name) == 0)
1353 return __dso__find_by_longname(&dsos->root, name);
1356 struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
1359 pthread_rwlock_rdlock(&dsos->lock);
1360 dso = __dsos__find(dsos, name, cmp_short);
1361 pthread_rwlock_unlock(&dsos->lock);
1365 struct dso *__dsos__addnew(struct dsos *dsos, const char *name)
1367 struct dso *dso = dso__new(name);
1370 __dsos__add(dsos, dso);
1371 dso__set_basename(dso);
1372 /* Put dso here because __dsos_add already got it */
1378 struct dso *__dsos__findnew(struct dsos *dsos, const char *name)
1380 struct dso *dso = __dsos__find(dsos, name, false);
1382 return dso ? dso : __dsos__addnew(dsos, name);
1385 struct dso *dsos__findnew(struct dsos *dsos, const char *name)
1388 pthread_rwlock_wrlock(&dsos->lock);
1389 dso = dso__get(__dsos__findnew(dsos, name));
1390 pthread_rwlock_unlock(&dsos->lock);
1394 size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp,
1395 bool (skip)(struct dso *dso, int parm), int parm)
1400 list_for_each_entry(pos, head, node) {
1401 if (skip && skip(pos, parm))
1403 ret += dso__fprintf_buildid(pos, fp);
1404 ret += fprintf(fp, " %s\n", pos->long_name);
1409 size_t __dsos__fprintf(struct list_head *head, FILE *fp)
1414 list_for_each_entry(pos, head, node) {
1416 for (i = 0; i < MAP__NR_TYPES; ++i)
1417 ret += dso__fprintf(pos, i, fp);
1423 size_t dso__fprintf_buildid(struct dso *dso, FILE *fp)
1425 char sbuild_id[SBUILD_ID_SIZE];
1427 build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id);
1428 return fprintf(fp, "%s", sbuild_id);
1431 size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
1434 size_t ret = fprintf(fp, "dso: %s (", dso->short_name);
1436 if (dso->short_name != dso->long_name)
1437 ret += fprintf(fp, "%s, ", dso->long_name);
1438 ret += fprintf(fp, "%s, %sloaded, ", map_type__name[type],
1439 dso__loaded(dso, type) ? "" : "NOT ");
1440 ret += dso__fprintf_buildid(dso, fp);
1441 ret += fprintf(fp, ")\n");
1442 for (nd = rb_first(&dso->symbols[type]); nd; nd = rb_next(nd)) {
1443 struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
1444 ret += symbol__fprintf(pos, fp);
1450 enum dso_type dso__type(struct dso *dso, struct machine *machine)
1453 enum dso_type type = DSO__TYPE_UNKNOWN;
1455 fd = dso__data_get_fd(dso, machine);
1457 type = dso__type_fd(fd);
1458 dso__data_put_fd(dso);
1464 int dso__strerror_load(struct dso *dso, char *buf, size_t buflen)
1466 int idx, errnum = dso->load_errno;
1468 * This must have a same ordering as the enum dso_load_errno.
1470 static const char *dso_load__error_str[] = {
1471 "Internal tools/perf/ library error",
1473 "Can not read build id",
1474 "Mismatching build id",
1475 "Decompression failure",
1478 BUG_ON(buflen == 0);
1481 const char *err = str_error_r(errnum, buf, buflen);
1484 scnprintf(buf, buflen, "%s", err);
1489 if (errnum < __DSO_LOAD_ERRNO__START || errnum >= __DSO_LOAD_ERRNO__END)
1492 idx = errnum - __DSO_LOAD_ERRNO__START;
1493 scnprintf(buf, buflen, "%s", dso_load__error_str[idx]);