1 // SPDX-License-Identifier: GPL-2.0
7 #include "namespaces.h"
12 #include <symbol.h> // filename__read_build_id
15 void dsos__init(struct dsos *dsos)
17 init_rwsem(&dsos->lock);
25 static void dsos__purge(struct dsos *dsos)
27 down_write(&dsos->lock);
29 for (unsigned int i = 0; i < dsos->cnt; i++) {
30 struct dso *dso = dsos->dsos[i];
32 dso__set_dsos(dso, NULL);
41 up_write(&dsos->lock);
44 void dsos__exit(struct dsos *dsos)
47 exit_rwsem(&dsos->lock);
51 static int __dsos__for_each_dso(struct dsos *dsos,
52 int (*cb)(struct dso *dso, void *data),
55 for (unsigned int i = 0; i < dsos->cnt; i++) {
56 struct dso *dso = dsos->dsos[i];
66 struct dsos__read_build_ids_cb_args {
71 static int dsos__read_build_ids_cb(struct dso *dso, void *data)
73 struct dsos__read_build_ids_cb_args *args = data;
76 if (args->with_hits && !dso__hit(dso) && !dso__is_vdso(dso))
78 if (dso__has_build_id(dso)) {
79 args->have_build_id = true;
82 nsinfo__mountns_enter(dso__nsinfo(dso), &nsc);
83 if (filename__read_build_id(dso__long_name(dso), dso__bid(dso)) > 0) {
84 args->have_build_id = true;
85 dso__set_has_build_id(dso);
86 } else if (errno == ENOENT && dso__nsinfo(dso)) {
87 char *new_name = dso__filename_with_chroot(dso, dso__long_name(dso));
89 if (new_name && filename__read_build_id(new_name, dso__bid(dso)) > 0) {
90 args->have_build_id = true;
91 dso__set_has_build_id(dso);
95 nsinfo__mountns_exit(&nsc);
99 bool dsos__read_build_ids(struct dsos *dsos, bool with_hits)
101 struct dsos__read_build_ids_cb_args args = {
102 .with_hits = with_hits,
103 .have_build_id = false,
106 dsos__for_each_dso(dsos, dsos__read_build_ids_cb, &args);
107 return args.have_build_id;
110 static int __dso__cmp_long_name(const char *long_name, const struct dso_id *id,
113 int rc = strcmp(long_name, dso__long_name(b));
114 return rc ?: dso_id__cmp(id, dso__id_const(b));
117 static int __dso__cmp_short_name(const char *short_name, const struct dso_id *id,
120 int rc = strcmp(short_name, dso__short_name(b));
121 return rc ?: dso_id__cmp(id, dso__id_const(b));
124 static int dsos__cmp_long_name_id_short_name(const void *va, const void *vb)
126 const struct dso *a = *((const struct dso **)va);
127 const struct dso *b = *((const struct dso **)vb);
128 int rc = strcmp(dso__long_name(a), dso__long_name(b));
131 rc = dso_id__cmp(dso__id_const(a), dso__id_const(b));
133 rc = strcmp(dso__short_name(a), dso__short_name(b));
139 const char *long_name;
140 const struct dso_id *id;
143 static int dsos__cmp_key_long_name_id(const void *vkey, const void *vdso)
145 const struct dsos__key *key = vkey;
146 const struct dso *dso = *((const struct dso **)vdso);
148 return __dso__cmp_long_name(key->long_name, key->id, dso);
152 * Find a matching entry and/or link current entry to RB tree.
153 * Either one of the dso or name parameter must be non-NULL or the
154 * function will not work.
156 static struct dso *__dsos__find_by_longname_id(struct dsos *dsos,
161 struct dsos__key key = {
167 if (dsos->dsos == NULL)
174 up_read(&dsos->lock);
175 down_write(&dsos->lock);
176 dso = __dsos__find_by_longname_id(dsos, name, id,
177 /*write_locked=*/true);
178 up_write(&dsos->lock);
179 down_read(&dsos->lock);
182 qsort(dsos->dsos, dsos->cnt, sizeof(struct dso *),
183 dsos__cmp_long_name_id_short_name);
187 res = bsearch(&key, dsos->dsos, dsos->cnt, sizeof(struct dso *),
188 dsos__cmp_key_long_name_id);
192 return dso__get(*res);
195 int __dsos__add(struct dsos *dsos, struct dso *dso)
197 if (dsos->cnt == dsos->allocated) {
198 unsigned int to_allocate = 2;
201 if (dsos->allocated > 0)
202 to_allocate = dsos->allocated * 2;
203 temp = realloc(dsos->dsos, sizeof(struct dso *) * to_allocate);
207 dsos->allocated = to_allocate;
210 dsos->dsos[dsos->cnt++] = dso__get(dso);
212 int low = 0, high = dsos->cnt - 1;
213 int insert = dsos->cnt; /* Default to inserting at the end. */
215 while (low <= high) {
216 int mid = low + (high - low) / 2;
217 int cmp = dsos__cmp_long_name_id_short_name(&dsos->dsos[mid], &dso);
226 memmove(&dsos->dsos[insert + 1], &dsos->dsos[insert],
227 (dsos->cnt - insert) * sizeof(struct dso *));
229 dsos->dsos[insert] = dso__get(dso);
231 dso__set_dsos(dso, dsos);
235 int dsos__add(struct dsos *dsos, struct dso *dso)
239 down_write(&dsos->lock);
240 ret = __dsos__add(dsos, dso);
241 up_write(&dsos->lock);
245 struct dsos__find_id_cb_args {
251 static int dsos__find_id_cb(struct dso *dso, void *data)
253 struct dsos__find_id_cb_args *args = data;
255 if (__dso__cmp_short_name(args->name, args->id, dso) == 0) {
256 args->res = dso__get(dso);
263 static struct dso *__dsos__find_id(struct dsos *dsos, const char *name, struct dso_id *id,
264 bool cmp_short, bool write_locked)
269 struct dsos__find_id_cb_args args = {
275 __dsos__for_each_dso(dsos, dsos__find_id_cb, &args);
278 res = __dsos__find_by_longname_id(dsos, name, id, write_locked);
282 struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short)
286 down_read(&dsos->lock);
287 res = __dsos__find_id(dsos, name, NULL, cmp_short, /*write_locked=*/false);
288 up_read(&dsos->lock);
292 static void dso__set_basename(struct dso *dso)
297 if (perf_pid_map_tid(dso__long_name(dso), &tid)) {
298 if (asprintf(&base, "[JIT] tid %d", tid) < 0)
302 * basename() may modify path buffer, so we must pass
305 lname = strdup(dso__long_name(dso));
310 * basename() may return a pointer to internal
311 * storage which is reused in subsequent calls
312 * so copy the result.
314 base = strdup(basename(lname));
321 dso__set_short_name(dso, base, true);
324 static struct dso *__dsos__addnew_id(struct dsos *dsos, const char *name, struct dso_id *id)
326 struct dso *dso = dso__new_id(name, id);
330 * The dsos lock is held on entry, so rename the dso before
331 * adding it to avoid needing to take the dsos lock again to say
332 * the array isn't sorted.
334 dso__set_basename(dso);
335 __dsos__add(dsos, dso);
340 static struct dso *__dsos__findnew_id(struct dsos *dsos, const char *name, struct dso_id *id)
342 struct dso *dso = __dsos__find_id(dsos, name, id, false, /*write_locked=*/true);
344 if (dso && dso_id__empty(dso__id(dso)) && !dso_id__empty(id))
345 __dso__inject_id(dso, id);
347 return dso ? dso : __dsos__addnew_id(dsos, name, id);
350 struct dso *dsos__findnew_id(struct dsos *dsos, const char *name, struct dso_id *id)
353 down_write(&dsos->lock);
354 dso = __dsos__findnew_id(dsos, name, id);
355 up_write(&dsos->lock);
359 struct dsos__fprintf_buildid_cb_args {
361 bool (*skip)(struct dso *dso, int parm);
366 static int dsos__fprintf_buildid_cb(struct dso *dso, void *data)
368 struct dsos__fprintf_buildid_cb_args *args = data;
369 char sbuild_id[SBUILD_ID_SIZE];
371 if (args->skip && args->skip(dso, args->parm))
373 build_id__sprintf(dso__bid(dso), sbuild_id);
374 args->ret += fprintf(args->fp, "%-40s %s\n", sbuild_id, dso__long_name(dso));
378 size_t dsos__fprintf_buildid(struct dsos *dsos, FILE *fp,
379 bool (*skip)(struct dso *dso, int parm), int parm)
381 struct dsos__fprintf_buildid_cb_args args = {
388 dsos__for_each_dso(dsos, dsos__fprintf_buildid_cb, &args);
392 struct dsos__fprintf_cb_args {
397 static int dsos__fprintf_cb(struct dso *dso, void *data)
399 struct dsos__fprintf_cb_args *args = data;
401 args->ret += dso__fprintf(dso, args->fp);
405 size_t dsos__fprintf(struct dsos *dsos, FILE *fp)
407 struct dsos__fprintf_cb_args args = {
412 dsos__for_each_dso(dsos, dsos__fprintf_cb, &args);
416 static int dsos__hit_all_cb(struct dso *dso, void *data __maybe_unused)
422 int dsos__hit_all(struct dsos *dsos)
424 return dsos__for_each_dso(dsos, dsos__hit_all_cb, NULL);
427 struct dso *dsos__findnew_module_dso(struct dsos *dsos,
428 struct machine *machine,
430 const char *filename)
434 down_write(&dsos->lock);
436 dso = __dsos__find_id(dsos, m->name, NULL, /*cmp_short=*/true, /*write_locked=*/true);
438 up_write(&dsos->lock);
442 * Failed to find the dso so create it. Change the name before adding it
443 * to the array, to avoid unnecessary sorts and potential locking
446 dso = dso__new_id(m->name, /*id=*/NULL);
448 up_write(&dsos->lock);
451 dso__set_basename(dso);
452 dso__set_module_info(dso, m, machine);
453 dso__set_long_name(dso, strdup(filename), true);
454 dso__set_kernel(dso, DSO_SPACE__KERNEL);
455 __dsos__add(dsos, dso);
457 up_write(&dsos->lock);
461 static int dsos__find_kernel_dso_cb(struct dso *dso, void *data)
463 struct dso **res = data;
465 * The cpumode passed to is_kernel_module is not the cpumode of *this*
466 * event. If we insist on passing correct cpumode to is_kernel_module,
467 * we should record the cpumode when we adding this dso to the linked
470 * However we don't really need passing correct cpumode. We know the
471 * correct cpumode must be kernel mode (if not, we should not link it
472 * onto kernel_dsos list).
474 * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
475 * is_kernel_module() treats it as a kernel cpumode.
477 if (!dso__kernel(dso) ||
478 is_kernel_module(dso__long_name(dso), PERF_RECORD_MISC_CPUMODE_UNKNOWN))
481 *res = dso__get(dso);
485 struct dso *dsos__find_kernel_dso(struct dsos *dsos)
487 struct dso *res = NULL;
489 dsos__for_each_dso(dsos, dsos__find_kernel_dso_cb, &res);
493 int dsos__for_each_dso(struct dsos *dsos, int (*cb)(struct dso *dso, void *data), void *data)
497 down_read(&dsos->lock);
498 err = __dsos__for_each_dso(dsos, cb, data);
499 up_read(&dsos->lock);