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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
76b31a29 | 2 | #include <dirent.h> |
a43783ae | 3 | #include <errno.h> |
fd20e811 | 4 | #include <inttypes.h> |
1eae20c1 | 5 | #include <regex.h> |
f2a39fe8 | 6 | #include <stdlib.h> |
3f067dca | 7 | #include "callchain.h" |
b0a7d1a0 | 8 | #include "debug.h" |
4a3cec84 | 9 | #include "dso.h" |
f2a39fe8 | 10 | #include "env.h" |
b0a7d1a0 | 11 | #include "event.h" |
3f067dca ACM |
12 | #include "evsel.h" |
13 | #include "hist.h" | |
9d2f8e22 ACM |
14 | #include "machine.h" |
15 | #include "map.h" | |
d3300a3c ACM |
16 | #include "map_symbol.h" |
17 | #include "branch.h" | |
18 | #include "mem-events.h" | |
97b9d866 | 19 | #include "srcline.h" |
daecf9e0 | 20 | #include "symbol.h" |
3f067dca | 21 | #include "sort.h" |
69d2591a | 22 | #include "strlist.h" |
aeb00b1a | 23 | #include "target.h" |
9d2f8e22 | 24 | #include "thread.h" |
97b9d866 | 25 | #include "util.h" |
d027b640 | 26 | #include "vdso.h" |
9d2f8e22 | 27 | #include <stdbool.h> |
7a8ef4c4 ACM |
28 | #include <sys/types.h> |
29 | #include <sys/stat.h> | |
30 | #include <unistd.h> | |
3f067dca | 31 | #include "unwind.h" |
8b7bad58 | 32 | #include "linux/hash.h" |
f3b3614a | 33 | #include "asm/bug.h" |
45178a92 | 34 | #include "bpf-event.h" |
20f2be1d | 35 | #include <internal/lib.h> // page_size |
9d2f8e22 | 36 | |
3052ba56 | 37 | #include <linux/ctype.h> |
3d689ed6 | 38 | #include <symbol/kallsyms.h> |
0f476f2b | 39 | #include <linux/mman.h> |
8520a98d | 40 | #include <linux/string.h> |
7f7c536f | 41 | #include <linux/zalloc.h> |
3d689ed6 | 42 | |
b91fc39f ACM |
43 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock); |
44 | ||
e167f995 ACM |
45 | static void dsos__init(struct dsos *dsos) |
46 | { | |
47 | INIT_LIST_HEAD(&dsos->head); | |
48 | dsos->root = RB_ROOT; | |
0a7c74ea | 49 | init_rwsem(&dsos->lock); |
e167f995 ACM |
50 | } |
51 | ||
91e467bc KL |
52 | static void machine__threads_init(struct machine *machine) |
53 | { | |
54 | int i; | |
55 | ||
56 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
57 | struct threads *threads = &machine->threads[i]; | |
f3acb3a8 | 58 | threads->entries = RB_ROOT_CACHED; |
0a7c74ea | 59 | init_rwsem(&threads->lock); |
91e467bc KL |
60 | threads->nr = 0; |
61 | INIT_LIST_HEAD(&threads->dead); | |
62 | threads->last_match = NULL; | |
63 | } | |
64 | } | |
65 | ||
8c7f1bb3 JO |
66 | static int machine__set_mmap_name(struct machine *machine) |
67 | { | |
c192524e JO |
68 | if (machine__is_host(machine)) |
69 | machine->mmap_name = strdup("[kernel.kallsyms]"); | |
70 | else if (machine__is_default_guest(machine)) | |
71 | machine->mmap_name = strdup("[guest.kernel.kallsyms]"); | |
72 | else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]", | |
73 | machine->pid) < 0) | |
74 | machine->mmap_name = NULL; | |
8c7f1bb3 JO |
75 | |
76 | return machine->mmap_name ? 0 : -ENOMEM; | |
77 | } | |
78 | ||
69d2591a ACM |
79 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
80 | { | |
81f981d7 JO |
81 | int err = -ENOMEM; |
82 | ||
93b0ba3c | 83 | memset(machine, 0, sizeof(*machine)); |
11246c70 | 84 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 85 | RB_CLEAR_NODE(&machine->rb_node); |
3d39ac53 | 86 | dsos__init(&machine->dsos); |
69d2591a | 87 | |
91e467bc | 88 | machine__threads_init(machine); |
69d2591a | 89 | |
d027b640 | 90 | machine->vdso_info = NULL; |
4cde998d | 91 | machine->env = NULL; |
d027b640 | 92 | |
69d2591a ACM |
93 | machine->pid = pid; |
94 | ||
14bd6d20 | 95 | machine->id_hdr_size = 0; |
caf8a0d0 | 96 | machine->kptr_restrict_warned = false; |
cfe1c414 | 97 | machine->comm_exec = false; |
fbe2af45 | 98 | machine->kernel_start = 0; |
3183f8ca | 99 | machine->vmlinux_map = NULL; |
cc1121ab | 100 | |
69d2591a ACM |
101 | machine->root_dir = strdup(root_dir); |
102 | if (machine->root_dir == NULL) | |
103 | return -ENOMEM; | |
104 | ||
8c7f1bb3 JO |
105 | if (machine__set_mmap_name(machine)) |
106 | goto out; | |
107 | ||
69d2591a | 108 | if (pid != HOST_KERNEL_ID) { |
1fcb8768 | 109 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 110 | pid); |
69d2591a ACM |
111 | char comm[64]; |
112 | ||
113 | if (thread == NULL) | |
81f981d7 | 114 | goto out; |
69d2591a ACM |
115 | |
116 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 117 | thread__set_comm(thread, comm, 0); |
b91fc39f | 118 | thread__put(thread); |
69d2591a ACM |
119 | } |
120 | ||
b9d266ba | 121 | machine->current_tid = NULL; |
81f981d7 | 122 | err = 0; |
b9d266ba | 123 | |
81f981d7 | 124 | out: |
8c7f1bb3 | 125 | if (err) { |
81f981d7 | 126 | zfree(&machine->root_dir); |
8c7f1bb3 JO |
127 | zfree(&machine->mmap_name); |
128 | } | |
69d2591a ACM |
129 | return 0; |
130 | } | |
131 | ||
8fb598e5 DA |
132 | struct machine *machine__new_host(void) |
133 | { | |
134 | struct machine *machine = malloc(sizeof(*machine)); | |
135 | ||
136 | if (machine != NULL) { | |
137 | machine__init(machine, "", HOST_KERNEL_ID); | |
138 | ||
139 | if (machine__create_kernel_maps(machine) < 0) | |
140 | goto out_delete; | |
141 | } | |
142 | ||
143 | return machine; | |
144 | out_delete: | |
145 | free(machine); | |
146 | return NULL; | |
147 | } | |
148 | ||
7d132caa ACM |
149 | struct machine *machine__new_kallsyms(void) |
150 | { | |
151 | struct machine *machine = machine__new_host(); | |
152 | /* | |
153 | * FIXME: | |
adba1634 | 154 | * 1) We should switch to machine__load_kallsyms(), i.e. not explicitly |
7d132caa ACM |
155 | * ask for not using the kcore parsing code, once this one is fixed |
156 | * to create a map per module. | |
157 | */ | |
329f0ade | 158 | if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) { |
7d132caa ACM |
159 | machine__delete(machine); |
160 | machine = NULL; | |
161 | } | |
162 | ||
163 | return machine; | |
164 | } | |
165 | ||
d3a7c489 | 166 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
167 | { |
168 | struct dso *pos, *n; | |
169 | ||
0a7c74ea | 170 | down_write(&dsos->lock); |
e8807844 | 171 | |
8fa7d87f | 172 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 173 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 174 | pos->root = NULL; |
d3a7c489 ACM |
175 | list_del_init(&pos->node); |
176 | dso__put(pos); | |
69d2591a | 177 | } |
e8807844 | 178 | |
0a7c74ea | 179 | up_write(&dsos->lock); |
d3a7c489 | 180 | } |
e8807844 | 181 | |
d3a7c489 ACM |
182 | static void dsos__exit(struct dsos *dsos) |
183 | { | |
184 | dsos__purge(dsos); | |
0a7c74ea | 185 | exit_rwsem(&dsos->lock); |
69d2591a ACM |
186 | } |
187 | ||
3f067dca ACM |
188 | void machine__delete_threads(struct machine *machine) |
189 | { | |
b91fc39f | 190 | struct rb_node *nd; |
91e467bc | 191 | int i; |
3f067dca | 192 | |
91e467bc KL |
193 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
194 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea | 195 | down_write(&threads->lock); |
f3acb3a8 | 196 | nd = rb_first_cached(&threads->entries); |
91e467bc KL |
197 | while (nd) { |
198 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
3f067dca | 199 | |
91e467bc KL |
200 | nd = rb_next(nd); |
201 | __machine__remove_thread(machine, t, false); | |
202 | } | |
0a7c74ea | 203 | up_write(&threads->lock); |
3f067dca ACM |
204 | } |
205 | } | |
206 | ||
69d2591a ACM |
207 | void machine__exit(struct machine *machine) |
208 | { | |
91e467bc KL |
209 | int i; |
210 | ||
19993b82 ACM |
211 | if (machine == NULL) |
212 | return; | |
213 | ||
ebe9729c | 214 | machine__destroy_kernel_maps(machine); |
69d2591a | 215 | map_groups__exit(&machine->kmaps); |
e8807844 | 216 | dsos__exit(&machine->dsos); |
9a4388c7 | 217 | machine__exit_vdso(machine); |
04662523 | 218 | zfree(&machine->root_dir); |
8c7f1bb3 | 219 | zfree(&machine->mmap_name); |
b9d266ba | 220 | zfree(&machine->current_tid); |
91e467bc KL |
221 | |
222 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
223 | struct threads *threads = &machine->threads[i]; | |
4c00af0e ACM |
224 | struct thread *thread, *n; |
225 | /* | |
226 | * Forget about the dead, at this point whatever threads were | |
227 | * left in the dead lists better have a reference count taken | |
228 | * by who is using them, and then, when they drop those references | |
229 | * and it finally hits zero, thread__put() will check and see that | |
230 | * its not in the dead threads list and will not try to remove it | |
231 | * from there, just calling thread__delete() straight away. | |
232 | */ | |
233 | list_for_each_entry_safe(thread, n, &threads->dead, node) | |
234 | list_del_init(&thread->node); | |
235 | ||
0a7c74ea | 236 | exit_rwsem(&threads->lock); |
91e467bc | 237 | } |
69d2591a ACM |
238 | } |
239 | ||
240 | void machine__delete(struct machine *machine) | |
241 | { | |
32ca678d ACM |
242 | if (machine) { |
243 | machine__exit(machine); | |
244 | free(machine); | |
245 | } | |
69d2591a ACM |
246 | } |
247 | ||
876650e6 ACM |
248 | void machines__init(struct machines *machines) |
249 | { | |
250 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
f3acb3a8 | 251 | machines->guests = RB_ROOT_CACHED; |
876650e6 ACM |
252 | } |
253 | ||
254 | void machines__exit(struct machines *machines) | |
255 | { | |
256 | machine__exit(&machines->host); | |
257 | /* XXX exit guest */ | |
258 | } | |
259 | ||
260 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
261 | const char *root_dir) |
262 | { | |
f3acb3a8 | 263 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
264 | struct rb_node *parent = NULL; |
265 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
f3acb3a8 | 266 | bool leftmost = true; |
69d2591a ACM |
267 | |
268 | if (machine == NULL) | |
269 | return NULL; | |
270 | ||
271 | if (machine__init(machine, root_dir, pid) != 0) { | |
272 | free(machine); | |
273 | return NULL; | |
274 | } | |
275 | ||
276 | while (*p != NULL) { | |
277 | parent = *p; | |
278 | pos = rb_entry(parent, struct machine, rb_node); | |
279 | if (pid < pos->pid) | |
280 | p = &(*p)->rb_left; | |
f3acb3a8 | 281 | else { |
69d2591a | 282 | p = &(*p)->rb_right; |
f3acb3a8 DB |
283 | leftmost = false; |
284 | } | |
69d2591a ACM |
285 | } |
286 | ||
287 | rb_link_node(&machine->rb_node, parent, p); | |
f3acb3a8 | 288 | rb_insert_color_cached(&machine->rb_node, &machines->guests, leftmost); |
69d2591a ACM |
289 | |
290 | return machine; | |
291 | } | |
292 | ||
cfe1c414 AH |
293 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
294 | { | |
295 | struct rb_node *nd; | |
296 | ||
297 | machines->host.comm_exec = comm_exec; | |
298 | ||
f3acb3a8 | 299 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
cfe1c414 AH |
300 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
301 | ||
302 | machine->comm_exec = comm_exec; | |
303 | } | |
304 | } | |
305 | ||
876650e6 | 306 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 307 | { |
f3acb3a8 | 308 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
309 | struct rb_node *parent = NULL; |
310 | struct machine *machine; | |
311 | struct machine *default_machine = NULL; | |
312 | ||
876650e6 ACM |
313 | if (pid == HOST_KERNEL_ID) |
314 | return &machines->host; | |
315 | ||
69d2591a ACM |
316 | while (*p != NULL) { |
317 | parent = *p; | |
318 | machine = rb_entry(parent, struct machine, rb_node); | |
319 | if (pid < machine->pid) | |
320 | p = &(*p)->rb_left; | |
321 | else if (pid > machine->pid) | |
322 | p = &(*p)->rb_right; | |
323 | else | |
324 | return machine; | |
325 | if (!machine->pid) | |
326 | default_machine = machine; | |
327 | } | |
328 | ||
329 | return default_machine; | |
330 | } | |
331 | ||
876650e6 | 332 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
333 | { |
334 | char path[PATH_MAX]; | |
335 | const char *root_dir = ""; | |
336 | struct machine *machine = machines__find(machines, pid); | |
337 | ||
338 | if (machine && (machine->pid == pid)) | |
339 | goto out; | |
340 | ||
341 | if ((pid != HOST_KERNEL_ID) && | |
342 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
343 | (symbol_conf.guestmount)) { | |
344 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
345 | if (access(path, R_OK)) { | |
346 | static struct strlist *seen; | |
347 | ||
348 | if (!seen) | |
4a77e218 | 349 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
350 | |
351 | if (!strlist__has_entry(seen, path)) { | |
352 | pr_err("Can't access file %s\n", path); | |
353 | strlist__add(seen, path); | |
354 | } | |
355 | machine = NULL; | |
356 | goto out; | |
357 | } | |
358 | root_dir = path; | |
359 | } | |
360 | ||
361 | machine = machines__add(machines, pid, root_dir); | |
362 | out: | |
363 | return machine; | |
364 | } | |
365 | ||
876650e6 ACM |
366 | void machines__process_guests(struct machines *machines, |
367 | machine__process_t process, void *data) | |
69d2591a ACM |
368 | { |
369 | struct rb_node *nd; | |
370 | ||
f3acb3a8 | 371 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
372 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
373 | process(pos, data); | |
374 | } | |
375 | } | |
376 | ||
876650e6 | 377 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
378 | { |
379 | struct rb_node *node; | |
380 | struct machine *machine; | |
381 | ||
876650e6 ACM |
382 | machines->host.id_hdr_size = id_hdr_size; |
383 | ||
f3acb3a8 DB |
384 | for (node = rb_first_cached(&machines->guests); node; |
385 | node = rb_next(node)) { | |
69d2591a ACM |
386 | machine = rb_entry(node, struct machine, rb_node); |
387 | machine->id_hdr_size = id_hdr_size; | |
388 | } | |
389 | ||
390 | return; | |
391 | } | |
392 | ||
29ce3612 AH |
393 | static void machine__update_thread_pid(struct machine *machine, |
394 | struct thread *th, pid_t pid) | |
395 | { | |
396 | struct thread *leader; | |
397 | ||
398 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
399 | return; | |
400 | ||
401 | th->pid_ = pid; | |
402 | ||
403 | if (th->pid_ == th->tid) | |
404 | return; | |
405 | ||
b91fc39f | 406 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
407 | if (!leader) |
408 | goto out_err; | |
409 | ||
410 | if (!leader->mg) | |
11246c70 | 411 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
412 | |
413 | if (!leader->mg) | |
414 | goto out_err; | |
415 | ||
416 | if (th->mg == leader->mg) | |
417 | return; | |
418 | ||
419 | if (th->mg) { | |
420 | /* | |
421 | * Maps are created from MMAP events which provide the pid and | |
422 | * tid. Consequently there never should be any maps on a thread | |
423 | * with an unknown pid. Just print an error if there are. | |
424 | */ | |
425 | if (!map_groups__empty(th->mg)) | |
426 | pr_err("Discarding thread maps for %d:%d\n", | |
427 | th->pid_, th->tid); | |
8e160b2e | 428 | map_groups__put(th->mg); |
29ce3612 AH |
429 | } |
430 | ||
431 | th->mg = map_groups__get(leader->mg); | |
abd82868 ACM |
432 | out_put: |
433 | thread__put(leader); | |
29ce3612 | 434 | return; |
29ce3612 AH |
435 | out_err: |
436 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
abd82868 | 437 | goto out_put; |
29ce3612 AH |
438 | } |
439 | ||
abd82868 | 440 | /* |
f8b2ebb5 JO |
441 | * Front-end cache - TID lookups come in blocks, |
442 | * so most of the time we dont have to look up | |
443 | * the full rbtree: | |
abd82868 | 444 | */ |
f8b2ebb5 | 445 | static struct thread* |
b57334b9 JO |
446 | __threads__get_last_match(struct threads *threads, struct machine *machine, |
447 | int pid, int tid) | |
9d2f8e22 | 448 | { |
9d2f8e22 ACM |
449 | struct thread *th; |
450 | ||
91e467bc | 451 | th = threads->last_match; |
f3b623b8 ACM |
452 | if (th != NULL) { |
453 | if (th->tid == tid) { | |
454 | machine__update_thread_pid(machine, th, pid); | |
abd82868 | 455 | return thread__get(th); |
f3b623b8 ACM |
456 | } |
457 | ||
91e467bc | 458 | threads->last_match = NULL; |
99d725fc | 459 | } |
9d2f8e22 | 460 | |
f8b2ebb5 JO |
461 | return NULL; |
462 | } | |
463 | ||
b57334b9 JO |
464 | static struct thread* |
465 | threads__get_last_match(struct threads *threads, struct machine *machine, | |
466 | int pid, int tid) | |
467 | { | |
468 | struct thread *th = NULL; | |
469 | ||
470 | if (perf_singlethreaded) | |
471 | th = __threads__get_last_match(threads, machine, pid, tid); | |
472 | ||
473 | return th; | |
474 | } | |
475 | ||
67fda0f3 | 476 | static void |
b57334b9 | 477 | __threads__set_last_match(struct threads *threads, struct thread *th) |
67fda0f3 JO |
478 | { |
479 | threads->last_match = th; | |
480 | } | |
481 | ||
b57334b9 JO |
482 | static void |
483 | threads__set_last_match(struct threads *threads, struct thread *th) | |
484 | { | |
485 | if (perf_singlethreaded) | |
486 | __threads__set_last_match(threads, th); | |
487 | } | |
488 | ||
f8b2ebb5 JO |
489 | /* |
490 | * Caller must eventually drop thread->refcnt returned with a successful | |
491 | * lookup/new thread inserted. | |
492 | */ | |
493 | static struct thread *____machine__findnew_thread(struct machine *machine, | |
494 | struct threads *threads, | |
495 | pid_t pid, pid_t tid, | |
496 | bool create) | |
497 | { | |
f3acb3a8 | 498 | struct rb_node **p = &threads->entries.rb_root.rb_node; |
f8b2ebb5 JO |
499 | struct rb_node *parent = NULL; |
500 | struct thread *th; | |
f3acb3a8 | 501 | bool leftmost = true; |
f8b2ebb5 JO |
502 | |
503 | th = threads__get_last_match(threads, machine, pid, tid); | |
504 | if (th) | |
505 | return th; | |
506 | ||
9d2f8e22 ACM |
507 | while (*p != NULL) { |
508 | parent = *p; | |
509 | th = rb_entry(parent, struct thread, rb_node); | |
510 | ||
38051234 | 511 | if (th->tid == tid) { |
67fda0f3 | 512 | threads__set_last_match(threads, th); |
29ce3612 | 513 | machine__update_thread_pid(machine, th, pid); |
abd82868 | 514 | return thread__get(th); |
9d2f8e22 ACM |
515 | } |
516 | ||
38051234 | 517 | if (tid < th->tid) |
9d2f8e22 | 518 | p = &(*p)->rb_left; |
f3acb3a8 | 519 | else { |
9d2f8e22 | 520 | p = &(*p)->rb_right; |
f3acb3a8 DB |
521 | leftmost = false; |
522 | } | |
9d2f8e22 ACM |
523 | } |
524 | ||
525 | if (!create) | |
526 | return NULL; | |
527 | ||
99d725fc | 528 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
529 | if (th != NULL) { |
530 | rb_link_node(&th->rb_node, parent, p); | |
f3acb3a8 | 531 | rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost); |
cddcef60 JO |
532 | |
533 | /* | |
534 | * We have to initialize map_groups separately | |
535 | * after rb tree is updated. | |
536 | * | |
537 | * The reason is that we call machine__findnew_thread | |
538 | * within thread__init_map_groups to find the thread | |
539 | * leader and that would screwed the rb tree. | |
540 | */ | |
418029b7 | 541 | if (thread__init_map_groups(th, machine)) { |
f3acb3a8 | 542 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 543 | RB_CLEAR_NODE(&th->rb_node); |
abd82868 | 544 | thread__put(th); |
cddcef60 | 545 | return NULL; |
418029b7 | 546 | } |
f3b623b8 ACM |
547 | /* |
548 | * It is now in the rbtree, get a ref | |
549 | */ | |
550 | thread__get(th); | |
67fda0f3 | 551 | threads__set_last_match(threads, th); |
91e467bc | 552 | ++threads->nr; |
9d2f8e22 ACM |
553 | } |
554 | ||
555 | return th; | |
556 | } | |
557 | ||
b91fc39f ACM |
558 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
559 | { | |
75e45e43 | 560 | return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true); |
b91fc39f ACM |
561 | } |
562 | ||
314add6b AH |
563 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
564 | pid_t tid) | |
9d2f8e22 | 565 | { |
91e467bc | 566 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f ACM |
567 | struct thread *th; |
568 | ||
0a7c74ea | 569 | down_write(&threads->lock); |
abd82868 | 570 | th = __machine__findnew_thread(machine, pid, tid); |
0a7c74ea | 571 | up_write(&threads->lock); |
b91fc39f | 572 | return th; |
9d2f8e22 ACM |
573 | } |
574 | ||
d75e6097 JO |
575 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
576 | pid_t tid) | |
9d2f8e22 | 577 | { |
91e467bc | 578 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f | 579 | struct thread *th; |
91e467bc | 580 | |
0a7c74ea | 581 | down_read(&threads->lock); |
75e45e43 | 582 | th = ____machine__findnew_thread(machine, threads, pid, tid, false); |
0a7c74ea | 583 | up_read(&threads->lock); |
b91fc39f | 584 | return th; |
9d2f8e22 | 585 | } |
b0a7d1a0 | 586 | |
cfe1c414 AH |
587 | struct comm *machine__thread_exec_comm(struct machine *machine, |
588 | struct thread *thread) | |
589 | { | |
590 | if (machine->comm_exec) | |
591 | return thread__exec_comm(thread); | |
592 | else | |
593 | return thread__comm(thread); | |
594 | } | |
595 | ||
162f0bef FW |
596 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
597 | struct perf_sample *sample) | |
b0a7d1a0 | 598 | { |
314add6b AH |
599 | struct thread *thread = machine__findnew_thread(machine, |
600 | event->comm.pid, | |
601 | event->comm.tid); | |
65de51f9 | 602 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 603 | int err = 0; |
b0a7d1a0 | 604 | |
cfe1c414 AH |
605 | if (exec) |
606 | machine->comm_exec = true; | |
607 | ||
b0a7d1a0 ACM |
608 | if (dump_trace) |
609 | perf_event__fprintf_comm(event, stdout); | |
610 | ||
65de51f9 AH |
611 | if (thread == NULL || |
612 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 613 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 614 | err = -1; |
b0a7d1a0 ACM |
615 | } |
616 | ||
b91fc39f ACM |
617 | thread__put(thread); |
618 | ||
619 | return err; | |
b0a7d1a0 ACM |
620 | } |
621 | ||
f3b3614a HB |
622 | int machine__process_namespaces_event(struct machine *machine __maybe_unused, |
623 | union perf_event *event, | |
624 | struct perf_sample *sample __maybe_unused) | |
625 | { | |
626 | struct thread *thread = machine__findnew_thread(machine, | |
627 | event->namespaces.pid, | |
628 | event->namespaces.tid); | |
629 | int err = 0; | |
630 | ||
631 | WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES, | |
632 | "\nWARNING: kernel seems to support more namespaces than perf" | |
633 | " tool.\nTry updating the perf tool..\n\n"); | |
634 | ||
635 | WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES, | |
636 | "\nWARNING: perf tool seems to support more namespaces than" | |
637 | " the kernel.\nTry updating the kernel..\n\n"); | |
638 | ||
639 | if (dump_trace) | |
640 | perf_event__fprintf_namespaces(event, stdout); | |
641 | ||
642 | if (thread == NULL || | |
643 | thread__set_namespaces(thread, sample->time, &event->namespaces)) { | |
644 | dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n"); | |
645 | err = -1; | |
646 | } | |
647 | ||
648 | thread__put(thread); | |
649 | ||
650 | return err; | |
651 | } | |
652 | ||
b0a7d1a0 | 653 | int machine__process_lost_event(struct machine *machine __maybe_unused, |
162f0bef | 654 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 | 655 | { |
5290ed69 | 656 | dump_printf(": id:%" PRI_lu64 ": lost:%" PRI_lu64 "\n", |
b0a7d1a0 ACM |
657 | event->lost.id, event->lost.lost); |
658 | return 0; | |
659 | } | |
660 | ||
c4937a91 KL |
661 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
662 | union perf_event *event, struct perf_sample *sample) | |
663 | { | |
a2e254d8 | 664 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n", |
c4937a91 KL |
665 | sample->id, event->lost_samples.lost); |
666 | return 0; | |
667 | } | |
668 | ||
9f2de315 ACM |
669 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
670 | struct kmod_path *m, | |
671 | const char *filename) | |
da17ea33 JO |
672 | { |
673 | struct dso *dso; | |
da17ea33 | 674 | |
0a7c74ea | 675 | down_write(&machine->dsos.lock); |
e8807844 ACM |
676 | |
677 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 678 | if (!dso) { |
e8807844 | 679 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 680 | if (dso == NULL) |
e8807844 | 681 | goto out_unlock; |
da17ea33 | 682 | |
6b335e8f | 683 | dso__set_module_info(dso, m, machine); |
ca33380a | 684 | dso__set_long_name(dso, strdup(filename), true); |
da17ea33 JO |
685 | } |
686 | ||
d3a7c489 | 687 | dso__get(dso); |
e8807844 | 688 | out_unlock: |
0a7c74ea | 689 | up_write(&machine->dsos.lock); |
da17ea33 JO |
690 | return dso; |
691 | } | |
692 | ||
4a96f7a0 AH |
693 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
694 | union perf_event *event) | |
695 | { | |
696 | if (dump_trace) | |
697 | perf_event__fprintf_aux(event, stdout); | |
698 | return 0; | |
699 | } | |
700 | ||
0ad21f68 AH |
701 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
702 | union perf_event *event) | |
703 | { | |
704 | if (dump_trace) | |
705 | perf_event__fprintf_itrace_start(event, stdout); | |
706 | return 0; | |
707 | } | |
708 | ||
0286039f AH |
709 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
710 | union perf_event *event) | |
711 | { | |
712 | if (dump_trace) | |
713 | perf_event__fprintf_switch(event, stdout); | |
714 | return 0; | |
715 | } | |
716 | ||
9aa0bfa3 SL |
717 | static int machine__process_ksymbol_register(struct machine *machine, |
718 | union perf_event *event, | |
719 | struct perf_sample *sample __maybe_unused) | |
720 | { | |
721 | struct symbol *sym; | |
722 | struct map *map; | |
723 | ||
ebdba16e | 724 | map = map_groups__find(&machine->kmaps, event->ksymbol.addr); |
9aa0bfa3 | 725 | if (!map) { |
ebdba16e | 726 | map = dso__new_map(event->ksymbol.name); |
9aa0bfa3 SL |
727 | if (!map) |
728 | return -ENOMEM; | |
729 | ||
ebdba16e ACM |
730 | map->start = event->ksymbol.addr; |
731 | map->end = map->start + event->ksymbol.len; | |
9aa0bfa3 SL |
732 | map_groups__insert(&machine->kmaps, map); |
733 | } | |
734 | ||
8529f2e6 | 735 | sym = symbol__new(map->map_ip(map, map->start), |
ebdba16e ACM |
736 | event->ksymbol.len, |
737 | 0, 0, event->ksymbol.name); | |
9aa0bfa3 SL |
738 | if (!sym) |
739 | return -ENOMEM; | |
740 | dso__insert_symbol(map->dso, sym); | |
741 | return 0; | |
742 | } | |
743 | ||
744 | static int machine__process_ksymbol_unregister(struct machine *machine, | |
745 | union perf_event *event, | |
746 | struct perf_sample *sample __maybe_unused) | |
747 | { | |
748 | struct map *map; | |
749 | ||
ebdba16e | 750 | map = map_groups__find(&machine->kmaps, event->ksymbol.addr); |
9aa0bfa3 SL |
751 | if (map) |
752 | map_groups__remove(&machine->kmaps, map); | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | int machine__process_ksymbol(struct machine *machine __maybe_unused, | |
758 | union perf_event *event, | |
759 | struct perf_sample *sample) | |
760 | { | |
761 | if (dump_trace) | |
762 | perf_event__fprintf_ksymbol(event, stdout); | |
763 | ||
ebdba16e | 764 | if (event->ksymbol.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER) |
9aa0bfa3 SL |
765 | return machine__process_ksymbol_unregister(machine, event, |
766 | sample); | |
767 | return machine__process_ksymbol_register(machine, event, sample); | |
768 | } | |
769 | ||
9f2de315 ACM |
770 | struct map *machine__findnew_module_map(struct machine *machine, u64 start, |
771 | const char *filename) | |
3f067dca | 772 | { |
ca33380a | 773 | struct map *map = NULL; |
566c69c3 | 774 | struct dso *dso = NULL; |
ca33380a | 775 | struct kmod_path m; |
3f067dca | 776 | |
ca33380a | 777 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
778 | return NULL; |
779 | ||
83cf774b | 780 | map = map_groups__find_by_name(&machine->kmaps, m.name); |
47b657fa | 781 | if (map) |
bc84f464 JO |
782 | goto out; |
783 | ||
9f2de315 | 784 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
785 | if (dso == NULL) |
786 | goto out; | |
787 | ||
3183f8ca | 788 | map = map__new2(start, dso); |
3f067dca | 789 | if (map == NULL) |
ca33380a | 790 | goto out; |
3f067dca | 791 | |
3f067dca | 792 | map_groups__insert(&machine->kmaps, map); |
ca33380a | 793 | |
9afcb420 MH |
794 | /* Put the map here because map_groups__insert alread got it */ |
795 | map__put(map); | |
ca33380a | 796 | out: |
566c69c3 MH |
797 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
798 | dso__put(dso); | |
d8f9da24 | 799 | zfree(&m.name); |
3f067dca ACM |
800 | return map; |
801 | } | |
802 | ||
876650e6 | 803 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
804 | { |
805 | struct rb_node *nd; | |
3d39ac53 | 806 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 807 | |
f3acb3a8 | 808 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 809 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 810 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
811 | } |
812 | ||
813 | return ret; | |
814 | } | |
815 | ||
8fa7d87f | 816 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
817 | bool (skip)(struct dso *dso, int parm), int parm) |
818 | { | |
3d39ac53 | 819 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
820 | } |
821 | ||
876650e6 | 822 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
823 | bool (skip)(struct dso *dso, int parm), int parm) |
824 | { | |
825 | struct rb_node *nd; | |
876650e6 | 826 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 827 | |
f3acb3a8 | 828 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
829 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
830 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
831 | } | |
832 | return ret; | |
833 | } | |
834 | ||
835 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
836 | { | |
837 | int i; | |
838 | size_t printed = 0; | |
a5e813c6 | 839 | struct dso *kdso = machine__kernel_map(machine)->dso; |
3f067dca ACM |
840 | |
841 | if (kdso->has_build_id) { | |
842 | char filename[PATH_MAX]; | |
d2396999 KJ |
843 | if (dso__build_id_filename(kdso, filename, sizeof(filename), |
844 | false)) | |
3f067dca ACM |
845 | printed += fprintf(fp, "[0] %s\n", filename); |
846 | } | |
847 | ||
848 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
849 | printed += fprintf(fp, "[%d] %s\n", | |
850 | i + kdso->has_build_id, vmlinux_path[i]); | |
851 | ||
852 | return printed; | |
853 | } | |
854 | ||
855 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
856 | { | |
3f067dca | 857 | struct rb_node *nd; |
91e467bc KL |
858 | size_t ret; |
859 | int i; | |
3f067dca | 860 | |
91e467bc KL |
861 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
862 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea ACM |
863 | |
864 | down_read(&threads->lock); | |
d2c11034 | 865 | |
91e467bc | 866 | ret = fprintf(fp, "Threads: %u\n", threads->nr); |
3f067dca | 867 | |
f3acb3a8 DB |
868 | for (nd = rb_first_cached(&threads->entries); nd; |
869 | nd = rb_next(nd)) { | |
91e467bc | 870 | struct thread *pos = rb_entry(nd, struct thread, rb_node); |
3f067dca | 871 | |
91e467bc KL |
872 | ret += thread__fprintf(pos, fp); |
873 | } | |
b91fc39f | 874 | |
0a7c74ea | 875 | up_read(&threads->lock); |
91e467bc | 876 | } |
3f067dca ACM |
877 | return ret; |
878 | } | |
879 | ||
880 | static struct dso *machine__get_kernel(struct machine *machine) | |
881 | { | |
8c7f1bb3 | 882 | const char *vmlinux_name = machine->mmap_name; |
3f067dca ACM |
883 | struct dso *kernel; |
884 | ||
885 | if (machine__is_host(machine)) { | |
c192524e JO |
886 | if (symbol_conf.vmlinux_name) |
887 | vmlinux_name = symbol_conf.vmlinux_name; | |
888 | ||
459ce518 ACM |
889 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
890 | "[kernel]", DSO_TYPE_KERNEL); | |
3f067dca | 891 | } else { |
c192524e JO |
892 | if (symbol_conf.default_guest_vmlinux_name) |
893 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
894 | ||
459ce518 ACM |
895 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
896 | "[guest.kernel]", | |
897 | DSO_TYPE_GUEST_KERNEL); | |
3f067dca ACM |
898 | } |
899 | ||
900 | if (kernel != NULL && (!kernel->has_build_id)) | |
901 | dso__read_running_kernel_build_id(kernel, machine); | |
902 | ||
903 | return kernel; | |
904 | } | |
905 | ||
906 | struct process_args { | |
907 | u64 start; | |
908 | }; | |
909 | ||
1c5aae77 AH |
910 | void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
911 | size_t bufsz) | |
15a0a870 AH |
912 | { |
913 | if (machine__is_default_guest(machine)) | |
914 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
915 | else | |
916 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
917 | } | |
918 | ||
a93f0e55 SQ |
919 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
920 | ||
921 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
922 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
923 | * symbol_name if it's not that important. | |
924 | */ | |
b843f62a | 925 | static int machine__get_running_kernel_start(struct machine *machine, |
ed9adb20 JO |
926 | const char **symbol_name, |
927 | u64 *start, u64 *end) | |
3f067dca | 928 | { |
15a0a870 | 929 | char filename[PATH_MAX]; |
b843f62a | 930 | int i, err = -1; |
a93f0e55 SQ |
931 | const char *name; |
932 | u64 addr = 0; | |
3f067dca | 933 | |
15a0a870 | 934 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
935 | |
936 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
937 | return 0; | |
938 | ||
a93f0e55 | 939 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
b843f62a ACM |
940 | err = kallsyms__get_function_start(filename, name, &addr); |
941 | if (!err) | |
a93f0e55 SQ |
942 | break; |
943 | } | |
944 | ||
b843f62a ACM |
945 | if (err) |
946 | return -1; | |
947 | ||
a93f0e55 SQ |
948 | if (symbol_name) |
949 | *symbol_name = name; | |
3f067dca | 950 | |
b843f62a | 951 | *start = addr; |
ed9adb20 JO |
952 | |
953 | err = kallsyms__get_function_start(filename, "_etext", &addr); | |
954 | if (!err) | |
955 | *end = addr; | |
956 | ||
b843f62a | 957 | return 0; |
3f067dca ACM |
958 | } |
959 | ||
1c5aae77 AH |
960 | int machine__create_extra_kernel_map(struct machine *machine, |
961 | struct dso *kernel, | |
962 | struct extra_kernel_map *xm) | |
4d99e413 AH |
963 | { |
964 | struct kmap *kmap; | |
965 | struct map *map; | |
966 | ||
967 | map = map__new2(xm->start, kernel); | |
968 | if (!map) | |
969 | return -1; | |
970 | ||
971 | map->end = xm->end; | |
972 | map->pgoff = xm->pgoff; | |
973 | ||
974 | kmap = map__kmap(map); | |
975 | ||
976 | kmap->kmaps = &machine->kmaps; | |
5759a682 | 977 | strlcpy(kmap->name, xm->name, KMAP_NAME_LEN); |
4d99e413 AH |
978 | |
979 | map_groups__insert(&machine->kmaps, map); | |
980 | ||
5759a682 AH |
981 | pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n", |
982 | kmap->name, map->start, map->end); | |
4d99e413 AH |
983 | |
984 | map__put(map); | |
985 | ||
986 | return 0; | |
987 | } | |
988 | ||
989 | static u64 find_entry_trampoline(struct dso *dso) | |
990 | { | |
991 | /* Duplicates are removed so lookup all aliases */ | |
992 | const char *syms[] = { | |
993 | "_entry_trampoline", | |
994 | "__entry_trampoline_start", | |
995 | "entry_SYSCALL_64_trampoline", | |
996 | }; | |
997 | struct symbol *sym = dso__first_symbol(dso); | |
998 | unsigned int i; | |
999 | ||
1000 | for (; sym; sym = dso__next_symbol(sym)) { | |
1001 | if (sym->binding != STB_GLOBAL) | |
1002 | continue; | |
1003 | for (i = 0; i < ARRAY_SIZE(syms); i++) { | |
1004 | if (!strcmp(sym->name, syms[i])) | |
1005 | return sym->start; | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * These values can be used for kernels that do not have symbols for the entry | |
1014 | * trampolines in kallsyms. | |
1015 | */ | |
1016 | #define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL | |
1017 | #define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000 | |
1018 | #define X86_64_ENTRY_TRAMPOLINE 0x6000 | |
1019 | ||
1020 | /* Map x86_64 PTI entry trampolines */ | |
1021 | int machine__map_x86_64_entry_trampolines(struct machine *machine, | |
1022 | struct dso *kernel) | |
1023 | { | |
1c5aae77 AH |
1024 | struct map_groups *kmaps = &machine->kmaps; |
1025 | struct maps *maps = &kmaps->maps; | |
4d99e413 | 1026 | int nr_cpus_avail, cpu; |
1c5aae77 AH |
1027 | bool found = false; |
1028 | struct map *map; | |
1029 | u64 pgoff; | |
1030 | ||
1031 | /* | |
1032 | * In the vmlinux case, pgoff is a virtual address which must now be | |
1033 | * mapped to a vmlinux offset. | |
1034 | */ | |
1035 | for (map = maps__first(maps); map; map = map__next(map)) { | |
1036 | struct kmap *kmap = __map__kmap(map); | |
1037 | struct map *dest_map; | |
1038 | ||
1039 | if (!kmap || !is_entry_trampoline(kmap->name)) | |
1040 | continue; | |
1041 | ||
1042 | dest_map = map_groups__find(kmaps, map->pgoff); | |
1043 | if (dest_map != map) | |
1044 | map->pgoff = dest_map->map_ip(dest_map, map->pgoff); | |
1045 | found = true; | |
1046 | } | |
1047 | if (found || machine->trampolines_mapped) | |
1048 | return 0; | |
4d99e413 | 1049 | |
1c5aae77 | 1050 | pgoff = find_entry_trampoline(kernel); |
4d99e413 AH |
1051 | if (!pgoff) |
1052 | return 0; | |
1053 | ||
1054 | nr_cpus_avail = machine__nr_cpus_avail(machine); | |
1055 | ||
1056 | /* Add a 1 page map for each CPU's entry trampoline */ | |
1057 | for (cpu = 0; cpu < nr_cpus_avail; cpu++) { | |
1058 | u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU + | |
1059 | cpu * X86_64_CPU_ENTRY_AREA_SIZE + | |
1060 | X86_64_ENTRY_TRAMPOLINE; | |
1061 | struct extra_kernel_map xm = { | |
1062 | .start = va, | |
1063 | .end = va + page_size, | |
1064 | .pgoff = pgoff, | |
1065 | }; | |
1066 | ||
5759a682 AH |
1067 | strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN); |
1068 | ||
4d99e413 AH |
1069 | if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0) |
1070 | return -1; | |
1071 | } | |
1072 | ||
1c5aae77 AH |
1073 | machine->trampolines_mapped = nr_cpus_avail; |
1074 | ||
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused, | |
1079 | struct dso *kernel __maybe_unused) | |
1080 | { | |
4d99e413 AH |
1081 | return 0; |
1082 | } | |
1083 | ||
1fb87b8e JO |
1084 | static int |
1085 | __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
3f067dca | 1086 | { |
3183f8ca ACM |
1087 | struct kmap *kmap; |
1088 | struct map *map; | |
3f067dca | 1089 | |
cc1121ab MH |
1090 | /* In case of renewal the kernel map, destroy previous one */ |
1091 | machine__destroy_kernel_maps(machine); | |
1092 | ||
3183f8ca ACM |
1093 | machine->vmlinux_map = map__new2(0, kernel); |
1094 | if (machine->vmlinux_map == NULL) | |
1095 | return -1; | |
3f067dca | 1096 | |
3183f8ca ACM |
1097 | machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip; |
1098 | map = machine__kernel_map(machine); | |
1099 | kmap = map__kmap(map); | |
1100 | if (!kmap) | |
1101 | return -1; | |
ba92732e | 1102 | |
3183f8ca ACM |
1103 | kmap->kmaps = &machine->kmaps; |
1104 | map_groups__insert(&machine->kmaps, map); | |
3f067dca ACM |
1105 | |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | void machine__destroy_kernel_maps(struct machine *machine) | |
1110 | { | |
3183f8ca ACM |
1111 | struct kmap *kmap; |
1112 | struct map *map = machine__kernel_map(machine); | |
3f067dca | 1113 | |
3183f8ca ACM |
1114 | if (map == NULL) |
1115 | return; | |
3f067dca | 1116 | |
3183f8ca ACM |
1117 | kmap = map__kmap(map); |
1118 | map_groups__remove(&machine->kmaps, map); | |
1119 | if (kmap && kmap->ref_reloc_sym) { | |
1120 | zfree((char **)&kmap->ref_reloc_sym->name); | |
1121 | zfree(&kmap->ref_reloc_sym); | |
3f067dca | 1122 | } |
3183f8ca ACM |
1123 | |
1124 | map__zput(machine->vmlinux_map); | |
3f067dca ACM |
1125 | } |
1126 | ||
876650e6 | 1127 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
1128 | { |
1129 | int ret = 0; | |
1130 | struct dirent **namelist = NULL; | |
1131 | int i, items = 0; | |
1132 | char path[PATH_MAX]; | |
1133 | pid_t pid; | |
1134 | char *endp; | |
1135 | ||
1136 | if (symbol_conf.default_guest_vmlinux_name || | |
1137 | symbol_conf.default_guest_modules || | |
1138 | symbol_conf.default_guest_kallsyms) { | |
1139 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
1140 | } | |
1141 | ||
1142 | if (symbol_conf.guestmount) { | |
1143 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
1144 | if (items <= 0) | |
1145 | return -ENOENT; | |
1146 | for (i = 0; i < items; i++) { | |
1147 | if (!isdigit(namelist[i]->d_name[0])) { | |
1148 | /* Filter out . and .. */ | |
1149 | continue; | |
1150 | } | |
1151 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
1152 | if ((*endp != '\0') || | |
1153 | (endp == namelist[i]->d_name) || | |
1154 | (errno == ERANGE)) { | |
1155 | pr_debug("invalid directory (%s). Skipping.\n", | |
1156 | namelist[i]->d_name); | |
1157 | continue; | |
1158 | } | |
1159 | sprintf(path, "%s/%s/proc/kallsyms", | |
1160 | symbol_conf.guestmount, | |
1161 | namelist[i]->d_name); | |
1162 | ret = access(path, R_OK); | |
1163 | if (ret) { | |
1164 | pr_debug("Can't access file %s\n", path); | |
1165 | goto failure; | |
1166 | } | |
1167 | machines__create_kernel_maps(machines, pid); | |
1168 | } | |
1169 | failure: | |
1170 | free(namelist); | |
1171 | } | |
1172 | ||
1173 | return ret; | |
1174 | } | |
1175 | ||
876650e6 | 1176 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 1177 | { |
f3acb3a8 | 1178 | struct rb_node *next = rb_first_cached(&machines->guests); |
876650e6 ACM |
1179 | |
1180 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
1181 | |
1182 | while (next) { | |
1183 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
1184 | ||
1185 | next = rb_next(&pos->rb_node); | |
f3acb3a8 | 1186 | rb_erase_cached(&pos->rb_node, &machines->guests); |
3f067dca ACM |
1187 | machine__delete(pos); |
1188 | } | |
1189 | } | |
1190 | ||
876650e6 | 1191 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
1192 | { |
1193 | struct machine *machine = machines__findnew(machines, pid); | |
1194 | ||
1195 | if (machine == NULL) | |
1196 | return -1; | |
1197 | ||
1198 | return machine__create_kernel_maps(machine); | |
1199 | } | |
1200 | ||
3183f8ca | 1201 | int machine__load_kallsyms(struct machine *machine, const char *filename) |
3f067dca | 1202 | { |
a5e813c6 | 1203 | struct map *map = machine__kernel_map(machine); |
e8f3879f | 1204 | int ret = __dso__load_kallsyms(map->dso, filename, map, true); |
3f067dca ACM |
1205 | |
1206 | if (ret > 0) { | |
3183f8ca | 1207 | dso__set_loaded(map->dso); |
3f067dca ACM |
1208 | /* |
1209 | * Since /proc/kallsyms will have multiple sessions for the | |
1210 | * kernel, with modules between them, fixup the end of all | |
1211 | * sections. | |
1212 | */ | |
3183f8ca | 1213 | map_groups__fixup_end(&machine->kmaps); |
3f067dca ACM |
1214 | } |
1215 | ||
1216 | return ret; | |
1217 | } | |
1218 | ||
1d1a2654 | 1219 | int machine__load_vmlinux_path(struct machine *machine) |
3f067dca | 1220 | { |
a5e813c6 | 1221 | struct map *map = machine__kernel_map(machine); |
be39db9f | 1222 | int ret = dso__load_vmlinux_path(map->dso, map); |
3f067dca | 1223 | |
39b12f78 | 1224 | if (ret > 0) |
3183f8ca | 1225 | dso__set_loaded(map->dso); |
3f067dca ACM |
1226 | |
1227 | return ret; | |
1228 | } | |
1229 | ||
3f067dca ACM |
1230 | static char *get_kernel_version(const char *root_dir) |
1231 | { | |
1232 | char version[PATH_MAX]; | |
1233 | FILE *file; | |
1234 | char *name, *tmp; | |
1235 | const char *prefix = "Linux version "; | |
1236 | ||
1237 | sprintf(version, "%s/proc/version", root_dir); | |
1238 | file = fopen(version, "r"); | |
1239 | if (!file) | |
1240 | return NULL; | |
1241 | ||
3f067dca ACM |
1242 | tmp = fgets(version, sizeof(version), file); |
1243 | fclose(file); | |
34b65aff DY |
1244 | if (!tmp) |
1245 | return NULL; | |
3f067dca ACM |
1246 | |
1247 | name = strstr(version, prefix); | |
1248 | if (!name) | |
1249 | return NULL; | |
1250 | name += strlen(prefix); | |
1251 | tmp = strchr(name, ' '); | |
1252 | if (tmp) | |
1253 | *tmp = '\0'; | |
1254 | ||
1255 | return strdup(name); | |
1256 | } | |
1257 | ||
bb58a8a4 JO |
1258 | static bool is_kmod_dso(struct dso *dso) |
1259 | { | |
1260 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1261 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1262 | } | |
1263 | ||
1264 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
1265 | struct kmod_path *m) | |
1266 | { | |
bb58a8a4 | 1267 | char *long_name; |
83cf774b | 1268 | struct map *map = map_groups__find_by_name(mg, m->name); |
bb58a8a4 | 1269 | |
bb58a8a4 JO |
1270 | if (map == NULL) |
1271 | return 0; | |
1272 | ||
1273 | long_name = strdup(path); | |
1274 | if (long_name == NULL) | |
1275 | return -ENOMEM; | |
1276 | ||
1277 | dso__set_long_name(map->dso, long_name, true); | |
1278 | dso__kernel_module_get_build_id(map->dso, ""); | |
1279 | ||
1280 | /* | |
1281 | * Full name could reveal us kmod compression, so | |
1282 | * we need to update the symtab_type if needed. | |
1283 | */ | |
2af52475 | 1284 | if (m->comp && is_kmod_dso(map->dso)) { |
bb58a8a4 | 1285 | map->dso->symtab_type++; |
2af52475 JO |
1286 | map->dso->comp = m->comp; |
1287 | } | |
bb58a8a4 JO |
1288 | |
1289 | return 0; | |
1290 | } | |
1291 | ||
3f067dca | 1292 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 1293 | const char *dir_name, int depth) |
3f067dca ACM |
1294 | { |
1295 | struct dirent *dent; | |
1296 | DIR *dir = opendir(dir_name); | |
1297 | int ret = 0; | |
1298 | ||
1299 | if (!dir) { | |
1300 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1301 | return -1; | |
1302 | } | |
1303 | ||
1304 | while ((dent = readdir(dir)) != NULL) { | |
1305 | char path[PATH_MAX]; | |
1306 | struct stat st; | |
1307 | ||
1308 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1309 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1310 | if (stat(path, &st)) | |
1311 | continue; | |
1312 | ||
1313 | if (S_ISDIR(st.st_mode)) { | |
1314 | if (!strcmp(dent->d_name, ".") || | |
1315 | !strcmp(dent->d_name, "..")) | |
1316 | continue; | |
1317 | ||
61d4290c RY |
1318 | /* Do not follow top-level source and build symlinks */ |
1319 | if (depth == 0) { | |
1320 | if (!strcmp(dent->d_name, "source") || | |
1321 | !strcmp(dent->d_name, "build")) | |
1322 | continue; | |
1323 | } | |
1324 | ||
1325 | ret = map_groups__set_modules_path_dir(mg, path, | |
1326 | depth + 1); | |
3f067dca ACM |
1327 | if (ret < 0) |
1328 | goto out; | |
1329 | } else { | |
bb58a8a4 | 1330 | struct kmod_path m; |
3f067dca | 1331 | |
bb58a8a4 JO |
1332 | ret = kmod_path__parse_name(&m, dent->d_name); |
1333 | if (ret) | |
1334 | goto out; | |
c00c48fc | 1335 | |
bb58a8a4 JO |
1336 | if (m.kmod) |
1337 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 1338 | |
d8f9da24 | 1339 | zfree(&m.name); |
3f067dca | 1340 | |
bb58a8a4 | 1341 | if (ret) |
3f067dca | 1342 | goto out; |
3f067dca ACM |
1343 | } |
1344 | } | |
1345 | ||
1346 | out: | |
1347 | closedir(dir); | |
1348 | return ret; | |
1349 | } | |
1350 | ||
1351 | static int machine__set_modules_path(struct machine *machine) | |
1352 | { | |
1353 | char *version; | |
1354 | char modules_path[PATH_MAX]; | |
1355 | ||
1356 | version = get_kernel_version(machine->root_dir); | |
1357 | if (!version) | |
1358 | return -1; | |
1359 | ||
61d4290c | 1360 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1361 | machine->root_dir, version); |
1362 | free(version); | |
1363 | ||
61d4290c | 1364 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca | 1365 | } |
203d8a4a | 1366 | int __weak arch__fix_module_text_start(u64 *start __maybe_unused, |
12a6d294 | 1367 | u64 *size __maybe_unused, |
203d8a4a SSG |
1368 | const char *name __maybe_unused) |
1369 | { | |
1370 | return 0; | |
1371 | } | |
3f067dca | 1372 | |
9ad4652b TR |
1373 | static int machine__create_module(void *arg, const char *name, u64 start, |
1374 | u64 size) | |
3f067dca | 1375 | { |
316d70d6 | 1376 | struct machine *machine = arg; |
3f067dca | 1377 | struct map *map; |
316d70d6 | 1378 | |
12a6d294 | 1379 | if (arch__fix_module_text_start(&start, &size, name) < 0) |
203d8a4a SSG |
1380 | return -1; |
1381 | ||
9f2de315 | 1382 | map = machine__findnew_module_map(machine, start, name); |
316d70d6 AH |
1383 | if (map == NULL) |
1384 | return -1; | |
9ad4652b | 1385 | map->end = start + size; |
316d70d6 AH |
1386 | |
1387 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1388 | ||
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | static int machine__create_modules(struct machine *machine) | |
1393 | { | |
3f067dca ACM |
1394 | const char *modules; |
1395 | char path[PATH_MAX]; | |
1396 | ||
f4be904d | 1397 | if (machine__is_default_guest(machine)) { |
3f067dca | 1398 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1399 | } else { |
1400 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1401 | modules = path; |
1402 | } | |
1403 | ||
aa7fe3b0 | 1404 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1405 | return -1; |
1406 | ||
316d70d6 | 1407 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1408 | return -1; |
1409 | ||
316d70d6 AH |
1410 | if (!machine__set_modules_path(machine)) |
1411 | return 0; | |
3f067dca | 1412 | |
316d70d6 | 1413 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1414 | |
8f76fcd9 | 1415 | return 0; |
3f067dca ACM |
1416 | } |
1417 | ||
1fb87b8e JO |
1418 | static void machine__set_kernel_mmap(struct machine *machine, |
1419 | u64 start, u64 end) | |
1420 | { | |
3183f8ca ACM |
1421 | machine->vmlinux_map->start = start; |
1422 | machine->vmlinux_map->end = end; | |
1423 | /* | |
1424 | * Be a bit paranoid here, some perf.data file came with | |
1425 | * a zero sized synthesized MMAP event for the kernel. | |
1426 | */ | |
1427 | if (start == 0 && end == 0) | |
1428 | machine->vmlinux_map->end = ~0ULL; | |
1fb87b8e JO |
1429 | } |
1430 | ||
977c7a6d WL |
1431 | static void machine__update_kernel_mmap(struct machine *machine, |
1432 | u64 start, u64 end) | |
1433 | { | |
1434 | struct map *map = machine__kernel_map(machine); | |
1435 | ||
1436 | map__get(map); | |
1437 | map_groups__remove(&machine->kmaps, map); | |
1438 | ||
1439 | machine__set_kernel_mmap(machine, start, end); | |
1440 | ||
1441 | map_groups__insert(&machine->kmaps, map); | |
1442 | map__put(map); | |
1443 | } | |
1444 | ||
3f067dca ACM |
1445 | int machine__create_kernel_maps(struct machine *machine) |
1446 | { | |
1447 | struct dso *kernel = machine__get_kernel(machine); | |
b843f62a | 1448 | const char *name = NULL; |
ee05d217 | 1449 | struct map *map; |
ed9adb20 | 1450 | u64 start = 0, end = ~0ULL; |
1154c957 MH |
1451 | int ret; |
1452 | ||
45e90056 | 1453 | if (kernel == NULL) |
5512cf24 | 1454 | return -1; |
3f067dca | 1455 | |
1154c957 | 1456 | ret = __machine__create_kernel_maps(machine, kernel); |
1154c957 | 1457 | if (ret < 0) |
1c5aae77 | 1458 | goto out_put; |
3f067dca ACM |
1459 | |
1460 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1461 | if (machine__is_host(machine)) | |
1462 | pr_debug("Problems creating module maps, " | |
1463 | "continuing anyway...\n"); | |
1464 | else | |
1465 | pr_debug("Problems creating module maps for guest %d, " | |
1466 | "continuing anyway...\n", machine->pid); | |
1467 | } | |
1468 | ||
ed9adb20 | 1469 | if (!machine__get_running_kernel_start(machine, &name, &start, &end)) { |
3f938ee2 | 1470 | if (name && |
ed9adb20 | 1471 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, start)) { |
3f938ee2 | 1472 | machine__destroy_kernel_maps(machine); |
1c5aae77 AH |
1473 | ret = -1; |
1474 | goto out_put; | |
3f938ee2 | 1475 | } |
ee05d217 | 1476 | |
977c7a6d WL |
1477 | /* |
1478 | * we have a real start address now, so re-order the kmaps | |
1479 | * assume it's the last in the kmaps | |
1480 | */ | |
ed9adb20 | 1481 | machine__update_kernel_mmap(machine, start, end); |
5512cf24 AH |
1482 | } |
1483 | ||
1c5aae77 AH |
1484 | if (machine__create_extra_kernel_maps(machine, kernel)) |
1485 | pr_debug("Problems creating extra kernel maps, continuing anyway...\n"); | |
1486 | ||
ed9adb20 JO |
1487 | if (end == ~0ULL) { |
1488 | /* update end address of the kernel map using adjacent module address */ | |
1489 | map = map__next(machine__kernel_map(machine)); | |
1490 | if (map) | |
1491 | machine__set_kernel_mmap(machine, start, map->start); | |
1492 | } | |
1493 | ||
1c5aae77 AH |
1494 | out_put: |
1495 | dso__put(kernel); | |
1496 | return ret; | |
3f067dca ACM |
1497 | } |
1498 | ||
8e0cf965 AH |
1499 | static bool machine__uses_kcore(struct machine *machine) |
1500 | { | |
1501 | struct dso *dso; | |
1502 | ||
3d39ac53 | 1503 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1504 | if (dso__is_kcore(dso)) |
1505 | return true; | |
1506 | } | |
1507 | ||
1508 | return false; | |
1509 | } | |
1510 | ||
a8ce99b0 AH |
1511 | static bool perf_event__is_extra_kernel_mmap(struct machine *machine, |
1512 | union perf_event *event) | |
1513 | { | |
1514 | return machine__is(machine, "x86_64") && | |
1515 | is_entry_trampoline(event->mmap.filename); | |
1516 | } | |
1517 | ||
1518 | static int machine__process_extra_kernel_map(struct machine *machine, | |
1519 | union perf_event *event) | |
1520 | { | |
1521 | struct map *kernel_map = machine__kernel_map(machine); | |
1522 | struct dso *kernel = kernel_map ? kernel_map->dso : NULL; | |
1523 | struct extra_kernel_map xm = { | |
1524 | .start = event->mmap.start, | |
1525 | .end = event->mmap.start + event->mmap.len, | |
1526 | .pgoff = event->mmap.pgoff, | |
1527 | }; | |
1528 | ||
1529 | if (kernel == NULL) | |
1530 | return -1; | |
1531 | ||
1532 | strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN); | |
1533 | ||
1534 | return machine__create_extra_kernel_map(machine, kernel, &xm); | |
1535 | } | |
1536 | ||
b0a7d1a0 ACM |
1537 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1538 | union perf_event *event) | |
1539 | { | |
1540 | struct map *map; | |
b0a7d1a0 ACM |
1541 | enum dso_kernel_type kernel_type; |
1542 | bool is_kernel_mmap; | |
1543 | ||
8e0cf965 AH |
1544 | /* If we have maps from kcore then we do not need or want any others */ |
1545 | if (machine__uses_kcore(machine)) | |
1546 | return 0; | |
1547 | ||
b0a7d1a0 ACM |
1548 | if (machine__is_host(machine)) |
1549 | kernel_type = DSO_TYPE_KERNEL; | |
1550 | else | |
1551 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1552 | ||
1553 | is_kernel_mmap = memcmp(event->mmap.filename, | |
8c7f1bb3 JO |
1554 | machine->mmap_name, |
1555 | strlen(machine->mmap_name) - 1) == 0; | |
b0a7d1a0 ACM |
1556 | if (event->mmap.filename[0] == '/' || |
1557 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
9f2de315 ACM |
1558 | map = machine__findnew_module_map(machine, event->mmap.start, |
1559 | event->mmap.filename); | |
b0a7d1a0 ACM |
1560 | if (map == NULL) |
1561 | goto out_problem; | |
1562 | ||
b0a7d1a0 ACM |
1563 | map->end = map->start + event->mmap.len; |
1564 | } else if (is_kernel_mmap) { | |
1565 | const char *symbol_name = (event->mmap.filename + | |
8c7f1bb3 | 1566 | strlen(machine->mmap_name)); |
b0a7d1a0 ACM |
1567 | /* |
1568 | * Should be there already, from the build-id table in | |
1569 | * the header. | |
1570 | */ | |
b837a8bd NK |
1571 | struct dso *kernel = NULL; |
1572 | struct dso *dso; | |
1573 | ||
0a7c74ea | 1574 | down_read(&machine->dsos.lock); |
e8807844 | 1575 | |
3d39ac53 | 1576 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1577 | |
1578 | /* | |
1579 | * The cpumode passed to is_kernel_module is not the | |
1580 | * cpumode of *this* event. If we insist on passing | |
1581 | * correct cpumode to is_kernel_module, we should | |
1582 | * record the cpumode when we adding this dso to the | |
1583 | * linked list. | |
1584 | * | |
1585 | * However we don't really need passing correct | |
1586 | * cpumode. We know the correct cpumode must be kernel | |
1587 | * mode (if not, we should not link it onto kernel_dsos | |
1588 | * list). | |
1589 | * | |
1590 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1591 | * is_kernel_module() treats it as a kernel cpumode. | |
1592 | */ | |
1593 | ||
1594 | if (!dso->kernel || | |
1595 | is_kernel_module(dso->long_name, | |
1596 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1597 | continue; |
1598 | ||
1f121b03 | 1599 | |
b837a8bd NK |
1600 | kernel = dso; |
1601 | break; | |
1602 | } | |
1603 | ||
0a7c74ea | 1604 | up_read(&machine->dsos.lock); |
e8807844 | 1605 | |
b837a8bd | 1606 | if (kernel == NULL) |
8c7f1bb3 | 1607 | kernel = machine__findnew_dso(machine, machine->mmap_name); |
b0a7d1a0 ACM |
1608 | if (kernel == NULL) |
1609 | goto out_problem; | |
1610 | ||
1611 | kernel->kernel = kernel_type; | |
d3a7c489 ACM |
1612 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1613 | dso__put(kernel); | |
b0a7d1a0 | 1614 | goto out_problem; |
d3a7c489 | 1615 | } |
b0a7d1a0 | 1616 | |
330dfa22 NK |
1617 | if (strstr(kernel->long_name, "vmlinux")) |
1618 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1619 | |
977c7a6d | 1620 | machine__update_kernel_mmap(machine, event->mmap.start, |
05db6ff7 | 1621 | event->mmap.start + event->mmap.len); |
b0a7d1a0 ACM |
1622 | |
1623 | /* | |
1624 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1625 | * symbol. Effectively having zero here means that at record | |
1626 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1627 | */ | |
1628 | if (event->mmap.pgoff != 0) { | |
3183f8ca ACM |
1629 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, |
1630 | symbol_name, | |
1631 | event->mmap.pgoff); | |
b0a7d1a0 ACM |
1632 | } |
1633 | ||
1634 | if (machine__is_default_guest(machine)) { | |
1635 | /* | |
1636 | * preload dso of guest kernel and modules | |
1637 | */ | |
be39db9f | 1638 | dso__load(kernel, machine__kernel_map(machine)); |
b0a7d1a0 | 1639 | } |
a8ce99b0 AH |
1640 | } else if (perf_event__is_extra_kernel_mmap(machine, event)) { |
1641 | return machine__process_extra_kernel_map(machine, event); | |
b0a7d1a0 ACM |
1642 | } |
1643 | return 0; | |
1644 | out_problem: | |
1645 | return -1; | |
1646 | } | |
1647 | ||
5c5e854b | 1648 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef | 1649 | union perf_event *event, |
473398a2 | 1650 | struct perf_sample *sample) |
5c5e854b | 1651 | { |
5c5e854b SE |
1652 | struct thread *thread; |
1653 | struct map *map; | |
5c5e854b SE |
1654 | int ret = 0; |
1655 | ||
1656 | if (dump_trace) | |
1657 | perf_event__fprintf_mmap2(event, stdout); | |
1658 | ||
473398a2 ACM |
1659 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1660 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
5c5e854b SE |
1661 | ret = machine__process_kernel_mmap_event(machine, event); |
1662 | if (ret < 0) | |
1663 | goto out_problem; | |
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1668 | event->mmap2.tid); |
5c5e854b SE |
1669 | if (thread == NULL) |
1670 | goto out_problem; | |
1671 | ||
2a03068c | 1672 | map = map__new(machine, event->mmap2.start, |
5c5e854b | 1673 | event->mmap2.len, event->mmap2.pgoff, |
bf2e710b | 1674 | event->mmap2.maj, |
5c5e854b SE |
1675 | event->mmap2.min, event->mmap2.ino, |
1676 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1677 | event->mmap2.prot, |
1678 | event->mmap2.flags, | |
3183f8ca | 1679 | event->mmap2.filename, thread); |
5c5e854b SE |
1680 | |
1681 | if (map == NULL) | |
b91fc39f | 1682 | goto out_problem_map; |
5c5e854b | 1683 | |
8132a2a8 HK |
1684 | ret = thread__insert_map(thread, map); |
1685 | if (ret) | |
1686 | goto out_problem_insert; | |
1687 | ||
b91fc39f | 1688 | thread__put(thread); |
84c2cafa | 1689 | map__put(map); |
5c5e854b SE |
1690 | return 0; |
1691 | ||
8132a2a8 HK |
1692 | out_problem_insert: |
1693 | map__put(map); | |
b91fc39f ACM |
1694 | out_problem_map: |
1695 | thread__put(thread); | |
5c5e854b SE |
1696 | out_problem: |
1697 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1698 | return 0; | |
1699 | } | |
1700 | ||
162f0bef | 1701 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
473398a2 | 1702 | struct perf_sample *sample) |
b0a7d1a0 | 1703 | { |
b0a7d1a0 ACM |
1704 | struct thread *thread; |
1705 | struct map *map; | |
0f476f2b | 1706 | u32 prot = 0; |
b0a7d1a0 ACM |
1707 | int ret = 0; |
1708 | ||
1709 | if (dump_trace) | |
1710 | perf_event__fprintf_mmap(event, stdout); | |
1711 | ||
473398a2 ACM |
1712 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1713 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
b0a7d1a0 ACM |
1714 | ret = machine__process_kernel_mmap_event(machine, event); |
1715 | if (ret < 0) | |
1716 | goto out_problem; | |
1717 | return 0; | |
1718 | } | |
1719 | ||
314add6b | 1720 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1721 | event->mmap.tid); |
b0a7d1a0 ACM |
1722 | if (thread == NULL) |
1723 | goto out_problem; | |
bad40917 | 1724 | |
3183f8ca | 1725 | if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA)) |
0f476f2b | 1726 | prot = PROT_EXEC; |
bad40917 | 1727 | |
2a03068c | 1728 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1729 | event->mmap.len, event->mmap.pgoff, |
0f476f2b | 1730 | 0, 0, 0, 0, prot, 0, |
5c5e854b | 1731 | event->mmap.filename, |
3183f8ca | 1732 | thread); |
bad40917 | 1733 | |
b0a7d1a0 | 1734 | if (map == NULL) |
b91fc39f | 1735 | goto out_problem_map; |
b0a7d1a0 | 1736 | |
8132a2a8 HK |
1737 | ret = thread__insert_map(thread, map); |
1738 | if (ret) | |
1739 | goto out_problem_insert; | |
1740 | ||
b91fc39f | 1741 | thread__put(thread); |
84c2cafa | 1742 | map__put(map); |
b0a7d1a0 ACM |
1743 | return 0; |
1744 | ||
8132a2a8 HK |
1745 | out_problem_insert: |
1746 | map__put(map); | |
b91fc39f ACM |
1747 | out_problem_map: |
1748 | thread__put(thread); | |
b0a7d1a0 ACM |
1749 | out_problem: |
1750 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1751 | return 0; | |
1752 | } | |
1753 | ||
b91fc39f | 1754 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1755 | { |
91e467bc KL |
1756 | struct threads *threads = machine__threads(machine, th->tid); |
1757 | ||
1758 | if (threads->last_match == th) | |
67fda0f3 | 1759 | threads__set_last_match(threads, NULL); |
f3b623b8 | 1760 | |
b91fc39f | 1761 | if (lock) |
0a7c74ea | 1762 | down_write(&threads->lock); |
4c00af0e ACM |
1763 | |
1764 | BUG_ON(refcount_read(&th->refcnt) == 0); | |
1765 | ||
f3acb3a8 | 1766 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 1767 | RB_CLEAR_NODE(&th->rb_node); |
91e467bc | 1768 | --threads->nr; |
236a3bbd | 1769 | /* |
f3b623b8 ACM |
1770 | * Move it first to the dead_threads list, then drop the reference, |
1771 | * if this is the last reference, then the thread__delete destructor | |
1772 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd | 1773 | */ |
91e467bc | 1774 | list_add_tail(&th->node, &threads->dead); |
4c00af0e ACM |
1775 | |
1776 | /* | |
1777 | * We need to do the put here because if this is the last refcount, | |
1778 | * then we will be touching the threads->dead head when removing the | |
1779 | * thread. | |
1780 | */ | |
1781 | thread__put(th); | |
1782 | ||
b91fc39f | 1783 | if (lock) |
0a7c74ea | 1784 | up_write(&threads->lock); |
236a3bbd DA |
1785 | } |
1786 | ||
b91fc39f ACM |
1787 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1788 | { | |
1789 | return __machine__remove_thread(machine, th, true); | |
1790 | } | |
1791 | ||
162f0bef FW |
1792 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1793 | struct perf_sample *sample) | |
b0a7d1a0 | 1794 | { |
d75e6097 JO |
1795 | struct thread *thread = machine__find_thread(machine, |
1796 | event->fork.pid, | |
1797 | event->fork.tid); | |
314add6b AH |
1798 | struct thread *parent = machine__findnew_thread(machine, |
1799 | event->fork.ppid, | |
1800 | event->fork.ptid); | |
4f8f382e | 1801 | bool do_maps_clone = true; |
b91fc39f | 1802 | int err = 0; |
b0a7d1a0 | 1803 | |
5cb73340 AH |
1804 | if (dump_trace) |
1805 | perf_event__fprintf_task(event, stdout); | |
1806 | ||
1807 | /* | |
1808 | * There may be an existing thread that is not actually the parent, | |
1809 | * either because we are processing events out of order, or because the | |
1810 | * (fork) event that would have removed the thread was lost. Assume the | |
1811 | * latter case and continue on as best we can. | |
1812 | */ | |
1813 | if (parent->pid_ != (pid_t)event->fork.ppid) { | |
1814 | dump_printf("removing erroneous parent thread %d/%d\n", | |
1815 | parent->pid_, parent->tid); | |
1816 | machine__remove_thread(machine, parent); | |
1817 | thread__put(parent); | |
1818 | parent = machine__findnew_thread(machine, event->fork.ppid, | |
1819 | event->fork.ptid); | |
1820 | } | |
1821 | ||
236a3bbd | 1822 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1823 | if (thread != NULL) { |
236a3bbd | 1824 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1825 | thread__put(thread); |
1826 | } | |
236a3bbd | 1827 | |
314add6b AH |
1828 | thread = machine__findnew_thread(machine, event->fork.pid, |
1829 | event->fork.tid); | |
4f8f382e DM |
1830 | /* |
1831 | * When synthesizing FORK events, we are trying to create thread | |
1832 | * objects for the already running tasks on the machine. | |
1833 | * | |
1834 | * Normally, for a kernel FORK event, we want to clone the parent's | |
1835 | * maps because that is what the kernel just did. | |
1836 | * | |
1837 | * But when synthesizing, this should not be done. If we do, we end up | |
1838 | * with overlapping maps as we process the sythesized MMAP2 events that | |
1839 | * get delivered shortly thereafter. | |
1840 | * | |
1841 | * Use the FORK event misc flags in an internal way to signal this | |
1842 | * situation, so we can elide the map clone when appropriate. | |
1843 | */ | |
1844 | if (event->fork.header.misc & PERF_RECORD_MISC_FORK_EXEC) | |
1845 | do_maps_clone = false; | |
b0a7d1a0 ACM |
1846 | |
1847 | if (thread == NULL || parent == NULL || | |
4f8f382e | 1848 | thread__fork(thread, parent, sample->time, do_maps_clone) < 0) { |
b0a7d1a0 | 1849 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1850 | err = -1; |
b0a7d1a0 | 1851 | } |
b91fc39f ACM |
1852 | thread__put(thread); |
1853 | thread__put(parent); | |
b0a7d1a0 | 1854 | |
b91fc39f | 1855 | return err; |
b0a7d1a0 ACM |
1856 | } |
1857 | ||
162f0bef FW |
1858 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1859 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1860 | { |
d75e6097 JO |
1861 | struct thread *thread = machine__find_thread(machine, |
1862 | event->fork.pid, | |
1863 | event->fork.tid); | |
b0a7d1a0 ACM |
1864 | |
1865 | if (dump_trace) | |
1866 | perf_event__fprintf_task(event, stdout); | |
1867 | ||
b91fc39f | 1868 | if (thread != NULL) { |
236a3bbd | 1869 | thread__exited(thread); |
b91fc39f ACM |
1870 | thread__put(thread); |
1871 | } | |
b0a7d1a0 ACM |
1872 | |
1873 | return 0; | |
1874 | } | |
1875 | ||
162f0bef FW |
1876 | int machine__process_event(struct machine *machine, union perf_event *event, |
1877 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1878 | { |
1879 | int ret; | |
1880 | ||
1881 | switch (event->header.type) { | |
1882 | case PERF_RECORD_COMM: | |
162f0bef | 1883 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1884 | case PERF_RECORD_MMAP: |
162f0bef | 1885 | ret = machine__process_mmap_event(machine, event, sample); break; |
f3b3614a HB |
1886 | case PERF_RECORD_NAMESPACES: |
1887 | ret = machine__process_namespaces_event(machine, event, sample); break; | |
5c5e854b | 1888 | case PERF_RECORD_MMAP2: |
162f0bef | 1889 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1890 | case PERF_RECORD_FORK: |
162f0bef | 1891 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1892 | case PERF_RECORD_EXIT: |
162f0bef | 1893 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1894 | case PERF_RECORD_LOST: |
162f0bef | 1895 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1896 | case PERF_RECORD_AUX: |
1897 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 | 1898 | case PERF_RECORD_ITRACE_START: |
ceb92913 | 1899 | ret = machine__process_itrace_start_event(machine, event); break; |
c4937a91 KL |
1900 | case PERF_RECORD_LOST_SAMPLES: |
1901 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0286039f AH |
1902 | case PERF_RECORD_SWITCH: |
1903 | case PERF_RECORD_SWITCH_CPU_WIDE: | |
1904 | ret = machine__process_switch_event(machine, event); break; | |
9aa0bfa3 SL |
1905 | case PERF_RECORD_KSYMBOL: |
1906 | ret = machine__process_ksymbol(machine, event, sample); break; | |
45178a92 | 1907 | case PERF_RECORD_BPF_EVENT: |
3f604b5f | 1908 | ret = machine__process_bpf(machine, event, sample); break; |
b0a7d1a0 ACM |
1909 | default: |
1910 | ret = -1; | |
1911 | break; | |
1912 | } | |
1913 | ||
1914 | return ret; | |
1915 | } | |
3f067dca | 1916 | |
b21484f1 | 1917 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1918 | { |
a7c3899c | 1919 | if (!regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1920 | return 1; |
3f067dca ACM |
1921 | return 0; |
1922 | } | |
1923 | ||
bb871a9c | 1924 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1925 | struct addr_map_symbol *ams, |
1926 | u64 ip) | |
1927 | { | |
1928 | struct addr_location al; | |
3f067dca ACM |
1929 | |
1930 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1931 | /* |
1932 | * We cannot use the header.misc hint to determine whether a | |
1933 | * branch stack address is user, kernel, guest, hypervisor. | |
1934 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1935 | * Thus, we have to try consecutively until we find a match | |
1936 | * or else, the symbol is unknown | |
1937 | */ | |
26bd9331 | 1938 | thread__find_cpumode_addr_location(thread, ip, &al); |
3f067dca | 1939 | |
3f067dca ACM |
1940 | ams->addr = ip; |
1941 | ams->al_addr = al.addr; | |
1942 | ams->sym = al.sym; | |
1943 | ams->map = al.map; | |
8780fb25 | 1944 | ams->phys_addr = 0; |
3f067dca ACM |
1945 | } |
1946 | ||
bb871a9c | 1947 | static void ip__resolve_data(struct thread *thread, |
8780fb25 KL |
1948 | u8 m, struct addr_map_symbol *ams, |
1949 | u64 addr, u64 phys_addr) | |
98a3b32c SE |
1950 | { |
1951 | struct addr_location al; | |
1952 | ||
1953 | memset(&al, 0, sizeof(al)); | |
1954 | ||
117d3c24 | 1955 | thread__find_symbol(thread, m, addr, &al); |
06b2afc0 | 1956 | |
98a3b32c SE |
1957 | ams->addr = addr; |
1958 | ams->al_addr = al.addr; | |
1959 | ams->sym = al.sym; | |
1960 | ams->map = al.map; | |
8780fb25 | 1961 | ams->phys_addr = phys_addr; |
98a3b32c SE |
1962 | } |
1963 | ||
e80faac0 ACM |
1964 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1965 | struct addr_location *al) | |
98a3b32c | 1966 | { |
9f87498f | 1967 | struct mem_info *mi = mem_info__new(); |
98a3b32c SE |
1968 | |
1969 | if (!mi) | |
1970 | return NULL; | |
1971 | ||
bb871a9c | 1972 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
8780fb25 KL |
1973 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, |
1974 | sample->addr, sample->phys_addr); | |
98a3b32c SE |
1975 | mi->data_src.val = sample->data_src; |
1976 | ||
1977 | return mi; | |
1978 | } | |
1979 | ||
40a342cd MW |
1980 | static char *callchain_srcline(struct map *map, struct symbol *sym, u64 ip) |
1981 | { | |
21ac9d54 MW |
1982 | char *srcline = NULL; |
1983 | ||
40a342cd | 1984 | if (!map || callchain_param.key == CCKEY_FUNCTION) |
21ac9d54 MW |
1985 | return srcline; |
1986 | ||
1987 | srcline = srcline__tree_find(&map->dso->srclines, ip); | |
1988 | if (!srcline) { | |
1989 | bool show_sym = false; | |
1990 | bool show_addr = callchain_param.key == CCKEY_ADDRESS; | |
1991 | ||
1992 | srcline = get_srcline(map->dso, map__rip_2objdump(map, ip), | |
935f5a9d | 1993 | sym, show_sym, show_addr, ip); |
21ac9d54 MW |
1994 | srcline__tree_insert(&map->dso->srclines, ip, srcline); |
1995 | } | |
40a342cd | 1996 | |
21ac9d54 | 1997 | return srcline; |
40a342cd MW |
1998 | } |
1999 | ||
c4ee0625 JY |
2000 | struct iterations { |
2001 | int nr_loop_iter; | |
2002 | u64 cycles; | |
2003 | }; | |
2004 | ||
37592b8a | 2005 | static int add_callchain_ip(struct thread *thread, |
91d7b2de | 2006 | struct callchain_cursor *cursor, |
37592b8a AK |
2007 | struct symbol **parent, |
2008 | struct addr_location *root_al, | |
73dbcd65 | 2009 | u8 *cpumode, |
410024db JY |
2010 | u64 ip, |
2011 | bool branch, | |
2012 | struct branch_flags *flags, | |
c4ee0625 | 2013 | struct iterations *iter, |
b851dd49 | 2014 | u64 branch_from) |
37592b8a AK |
2015 | { |
2016 | struct addr_location al; | |
c4ee0625 JY |
2017 | int nr_loop_iter = 0; |
2018 | u64 iter_cycles = 0; | |
40a342cd | 2019 | const char *srcline = NULL; |
37592b8a AK |
2020 | |
2021 | al.filtered = 0; | |
2022 | al.sym = NULL; | |
ceb8e626 | 2023 | al.srcline = NULL; |
73dbcd65 | 2024 | if (!cpumode) { |
26bd9331 | 2025 | thread__find_cpumode_addr_location(thread, ip, &al); |
73dbcd65 | 2026 | } else { |
2e77784b KL |
2027 | if (ip >= PERF_CONTEXT_MAX) { |
2028 | switch (ip) { | |
2029 | case PERF_CONTEXT_HV: | |
73dbcd65 | 2030 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
2031 | break; |
2032 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 2033 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
2034 | break; |
2035 | case PERF_CONTEXT_USER: | |
73dbcd65 | 2036 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
2037 | break; |
2038 | default: | |
2039 | pr_debug("invalid callchain context: " | |
2040 | "%"PRId64"\n", (s64) ip); | |
2041 | /* | |
2042 | * It seems the callchain is corrupted. | |
2043 | * Discard all. | |
2044 | */ | |
91d7b2de | 2045 | callchain_cursor_reset(cursor); |
2e77784b KL |
2046 | return 1; |
2047 | } | |
2048 | return 0; | |
2049 | } | |
4546263d | 2050 | thread__find_symbol(thread, *cpumode, ip, &al); |
2e77784b KL |
2051 | } |
2052 | ||
37592b8a | 2053 | if (al.sym != NULL) { |
de7e6a7c | 2054 | if (perf_hpp_list.parent && !*parent && |
37592b8a AK |
2055 | symbol__match_regex(al.sym, &parent_regex)) |
2056 | *parent = al.sym; | |
2057 | else if (have_ignore_callees && root_al && | |
2058 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
2059 | /* Treat this symbol as the root, | |
2060 | forgetting its callees. */ | |
2061 | *root_al = al; | |
91d7b2de | 2062 | callchain_cursor_reset(cursor); |
37592b8a AK |
2063 | } |
2064 | } | |
2065 | ||
b49a8fe5 NK |
2066 | if (symbol_conf.hide_unresolved && al.sym == NULL) |
2067 | return 0; | |
c4ee0625 JY |
2068 | |
2069 | if (iter) { | |
2070 | nr_loop_iter = iter->nr_loop_iter; | |
2071 | iter_cycles = iter->cycles; | |
2072 | } | |
2073 | ||
40a342cd | 2074 | srcline = callchain_srcline(al.map, al.sym, al.addr); |
19610184 | 2075 | return callchain_cursor_append(cursor, ip, al.map, al.sym, |
c4ee0625 | 2076 | branch, flags, nr_loop_iter, |
40a342cd | 2077 | iter_cycles, branch_from, srcline); |
37592b8a AK |
2078 | } |
2079 | ||
644f2df2 ACM |
2080 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
2081 | struct addr_location *al) | |
3f067dca | 2082 | { |
3f067dca | 2083 | unsigned int i; |
644f2df2 ACM |
2084 | const struct branch_stack *bs = sample->branch_stack; |
2085 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 2086 | |
3f067dca ACM |
2087 | if (!bi) |
2088 | return NULL; | |
2089 | ||
2090 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
2091 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
2092 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
2093 | bi[i].flags = bs->entries[i].flags; |
2094 | } | |
2095 | return bi; | |
2096 | } | |
2097 | ||
c4ee0625 JY |
2098 | static void save_iterations(struct iterations *iter, |
2099 | struct branch_entry *be, int nr) | |
2100 | { | |
2101 | int i; | |
2102 | ||
a3366db0 | 2103 | iter->nr_loop_iter++; |
c4ee0625 JY |
2104 | iter->cycles = 0; |
2105 | ||
2106 | for (i = 0; i < nr; i++) | |
2107 | iter->cycles += be[i].flags.cycles; | |
2108 | } | |
2109 | ||
8b7bad58 AK |
2110 | #define CHASHSZ 127 |
2111 | #define CHASHBITS 7 | |
2112 | #define NO_ENTRY 0xff | |
2113 | ||
2114 | #define PERF_MAX_BRANCH_DEPTH 127 | |
2115 | ||
2116 | /* Remove loops. */ | |
c4ee0625 JY |
2117 | static int remove_loops(struct branch_entry *l, int nr, |
2118 | struct iterations *iter) | |
8b7bad58 AK |
2119 | { |
2120 | int i, j, off; | |
2121 | unsigned char chash[CHASHSZ]; | |
2122 | ||
2123 | memset(chash, NO_ENTRY, sizeof(chash)); | |
2124 | ||
2125 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
2126 | ||
2127 | for (i = 0; i < nr; i++) { | |
2128 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
2129 | ||
2130 | /* no collision handling for now */ | |
2131 | if (chash[h] == NO_ENTRY) { | |
2132 | chash[h] = i; | |
2133 | } else if (l[chash[h]].from == l[i].from) { | |
2134 | bool is_loop = true; | |
2135 | /* check if it is a real loop */ | |
2136 | off = 0; | |
2137 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
2138 | if (l[j].from != l[i + off].from) { | |
2139 | is_loop = false; | |
2140 | break; | |
2141 | } | |
2142 | if (is_loop) { | |
c4ee0625 JY |
2143 | j = nr - (i + off); |
2144 | if (j > 0) { | |
2145 | save_iterations(iter + i + off, | |
2146 | l + i, off); | |
2147 | ||
2148 | memmove(iter + i, iter + i + off, | |
2149 | j * sizeof(*iter)); | |
2150 | ||
2151 | memmove(l + i, l + i + off, | |
2152 | j * sizeof(*l)); | |
2153 | } | |
2154 | ||
8b7bad58 AK |
2155 | nr -= off; |
2156 | } | |
2157 | } | |
2158 | } | |
2159 | return nr; | |
2160 | } | |
2161 | ||
384b6055 KL |
2162 | /* |
2163 | * Recolve LBR callstack chain sample | |
2164 | * Return: | |
2165 | * 1 on success get LBR callchain information | |
2166 | * 0 no available LBR callchain information, should try fp | |
2167 | * negative error code on other errors. | |
2168 | */ | |
2169 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
91d7b2de | 2170 | struct callchain_cursor *cursor, |
384b6055 KL |
2171 | struct perf_sample *sample, |
2172 | struct symbol **parent, | |
2173 | struct addr_location *root_al, | |
2174 | int max_stack) | |
3f067dca | 2175 | { |
384b6055 | 2176 | struct ip_callchain *chain = sample->callchain; |
18ef15c6 | 2177 | int chain_nr = min(max_stack, (int)chain->nr), i; |
73dbcd65 | 2178 | u8 cpumode = PERF_RECORD_MISC_USER; |
b851dd49 | 2179 | u64 ip, branch_from = 0; |
384b6055 KL |
2180 | |
2181 | for (i = 0; i < chain_nr; i++) { | |
2182 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
2183 | break; | |
2184 | } | |
2185 | ||
2186 | /* LBR only affects the user callchain */ | |
2187 | if (i != chain_nr) { | |
2188 | struct branch_stack *lbr_stack = sample->branch_stack; | |
410024db JY |
2189 | int lbr_nr = lbr_stack->nr, j, k; |
2190 | bool branch; | |
2191 | struct branch_flags *flags; | |
384b6055 KL |
2192 | /* |
2193 | * LBR callstack can only get user call chain. | |
2194 | * The mix_chain_nr is kernel call chain | |
2195 | * number plus LBR user call chain number. | |
2196 | * i is kernel call chain number, | |
2197 | * 1 is PERF_CONTEXT_USER, | |
2198 | * lbr_nr + 1 is the user call chain number. | |
2199 | * For details, please refer to the comments | |
2200 | * in callchain__printf | |
2201 | */ | |
2202 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
2203 | ||
384b6055 | 2204 | for (j = 0; j < mix_chain_nr; j++) { |
18ef15c6 | 2205 | int err; |
410024db JY |
2206 | branch = false; |
2207 | flags = NULL; | |
2208 | ||
384b6055 KL |
2209 | if (callchain_param.order == ORDER_CALLEE) { |
2210 | if (j < i + 1) | |
2211 | ip = chain->ips[j]; | |
410024db JY |
2212 | else if (j > i + 1) { |
2213 | k = j - i - 2; | |
2214 | ip = lbr_stack->entries[k].from; | |
2215 | branch = true; | |
2216 | flags = &lbr_stack->entries[k].flags; | |
2217 | } else { | |
384b6055 | 2218 | ip = lbr_stack->entries[0].to; |
410024db JY |
2219 | branch = true; |
2220 | flags = &lbr_stack->entries[0].flags; | |
b851dd49 JY |
2221 | branch_from = |
2222 | lbr_stack->entries[0].from; | |
410024db | 2223 | } |
384b6055 | 2224 | } else { |
410024db JY |
2225 | if (j < lbr_nr) { |
2226 | k = lbr_nr - j - 1; | |
2227 | ip = lbr_stack->entries[k].from; | |
2228 | branch = true; | |
2229 | flags = &lbr_stack->entries[k].flags; | |
2230 | } | |
384b6055 KL |
2231 | else if (j > lbr_nr) |
2232 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
410024db | 2233 | else { |
384b6055 | 2234 | ip = lbr_stack->entries[0].to; |
410024db JY |
2235 | branch = true; |
2236 | flags = &lbr_stack->entries[0].flags; | |
b851dd49 JY |
2237 | branch_from = |
2238 | lbr_stack->entries[0].from; | |
410024db | 2239 | } |
384b6055 KL |
2240 | } |
2241 | ||
410024db JY |
2242 | err = add_callchain_ip(thread, cursor, parent, |
2243 | root_al, &cpumode, ip, | |
c4ee0625 | 2244 | branch, flags, NULL, |
b851dd49 | 2245 | branch_from); |
384b6055 KL |
2246 | if (err) |
2247 | return (err < 0) ? err : 0; | |
2248 | } | |
2249 | return 1; | |
2250 | } | |
2251 | ||
2252 | return 0; | |
2253 | } | |
2254 | ||
e9024d51 DM |
2255 | static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread, |
2256 | struct callchain_cursor *cursor, | |
2257 | struct symbol **parent, | |
2258 | struct addr_location *root_al, | |
2259 | u8 *cpumode, int ent) | |
2260 | { | |
2261 | int err = 0; | |
2262 | ||
2263 | while (--ent >= 0) { | |
2264 | u64 ip = chain->ips[ent]; | |
2265 | ||
2266 | if (ip >= PERF_CONTEXT_MAX) { | |
2267 | err = add_callchain_ip(thread, cursor, parent, | |
2268 | root_al, cpumode, ip, | |
2269 | false, NULL, NULL, 0); | |
2270 | break; | |
2271 | } | |
2272 | } | |
2273 | return err; | |
2274 | } | |
2275 | ||
384b6055 | 2276 | static int thread__resolve_callchain_sample(struct thread *thread, |
91d7b2de | 2277 | struct callchain_cursor *cursor, |
32dcd021 | 2278 | struct evsel *evsel, |
384b6055 KL |
2279 | struct perf_sample *sample, |
2280 | struct symbol **parent, | |
2281 | struct addr_location *root_al, | |
2282 | int max_stack) | |
2283 | { | |
2284 | struct branch_stack *branch = sample->branch_stack; | |
2285 | struct ip_callchain *chain = sample->callchain; | |
b49a821e | 2286 | int chain_nr = 0; |
73dbcd65 | 2287 | u8 cpumode = PERF_RECORD_MISC_USER; |
bf8bddbf | 2288 | int i, j, err, nr_entries; |
8b7bad58 AK |
2289 | int skip_idx = -1; |
2290 | int first_call = 0; | |
2291 | ||
b49a821e JY |
2292 | if (chain) |
2293 | chain_nr = chain->nr; | |
2294 | ||
acf2abbd | 2295 | if (perf_evsel__has_branch_callstack(evsel)) { |
91d7b2de | 2296 | err = resolve_lbr_callchain_sample(thread, cursor, sample, parent, |
384b6055 KL |
2297 | root_al, max_stack); |
2298 | if (err) | |
2299 | return (err < 0) ? err : 0; | |
2300 | } | |
2301 | ||
8b7bad58 AK |
2302 | /* |
2303 | * Based on DWARF debug information, some architectures skip | |
2304 | * a callchain entry saved by the kernel. | |
2305 | */ | |
bf8bddbf | 2306 | skip_idx = arch_skip_callchain_idx(thread, chain); |
3f067dca | 2307 | |
8b7bad58 AK |
2308 | /* |
2309 | * Add branches to call stack for easier browsing. This gives | |
2310 | * more context for a sample than just the callers. | |
2311 | * | |
2312 | * This uses individual histograms of paths compared to the | |
2313 | * aggregated histograms the normal LBR mode uses. | |
2314 | * | |
2315 | * Limitations for now: | |
2316 | * - No extra filters | |
2317 | * - No annotations (should annotate somehow) | |
2318 | */ | |
2319 | ||
2320 | if (branch && callchain_param.branch_callstack) { | |
2321 | int nr = min(max_stack, (int)branch->nr); | |
2322 | struct branch_entry be[nr]; | |
c4ee0625 | 2323 | struct iterations iter[nr]; |
8b7bad58 AK |
2324 | |
2325 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
2326 | pr_warning("corrupted branch chain. skipping...\n"); | |
2327 | goto check_calls; | |
2328 | } | |
2329 | ||
2330 | for (i = 0; i < nr; i++) { | |
2331 | if (callchain_param.order == ORDER_CALLEE) { | |
2332 | be[i] = branch->entries[i]; | |
b49a821e JY |
2333 | |
2334 | if (chain == NULL) | |
2335 | continue; | |
2336 | ||
8b7bad58 AK |
2337 | /* |
2338 | * Check for overlap into the callchain. | |
2339 | * The return address is one off compared to | |
2340 | * the branch entry. To adjust for this | |
2341 | * assume the calling instruction is not longer | |
2342 | * than 8 bytes. | |
2343 | */ | |
2344 | if (i == skip_idx || | |
2345 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
2346 | first_call++; | |
2347 | else if (be[i].from < chain->ips[first_call] && | |
2348 | be[i].from >= chain->ips[first_call] - 8) | |
2349 | first_call++; | |
2350 | } else | |
2351 | be[i] = branch->entries[branch->nr - i - 1]; | |
2352 | } | |
2353 | ||
c4ee0625 JY |
2354 | memset(iter, 0, sizeof(struct iterations) * nr); |
2355 | nr = remove_loops(be, nr, iter); | |
410024db | 2356 | |
8b7bad58 | 2357 | for (i = 0; i < nr; i++) { |
c4ee0625 JY |
2358 | err = add_callchain_ip(thread, cursor, parent, |
2359 | root_al, | |
2360 | NULL, be[i].to, | |
2361 | true, &be[i].flags, | |
2362 | NULL, be[i].from); | |
410024db | 2363 | |
8b7bad58 | 2364 | if (!err) |
91d7b2de | 2365 | err = add_callchain_ip(thread, cursor, parent, root_al, |
410024db JY |
2366 | NULL, be[i].from, |
2367 | true, &be[i].flags, | |
c4ee0625 | 2368 | &iter[i], 0); |
8b7bad58 AK |
2369 | if (err == -EINVAL) |
2370 | break; | |
2371 | if (err) | |
2372 | return err; | |
2373 | } | |
b49a821e JY |
2374 | |
2375 | if (chain_nr == 0) | |
2376 | return 0; | |
2377 | ||
8b7bad58 AK |
2378 | chain_nr -= nr; |
2379 | } | |
2380 | ||
2381 | check_calls: | |
169780ef | 2382 | if (chain && callchain_param.order != ORDER_CALLEE) { |
e9024d51 DM |
2383 | err = find_prev_cpumode(chain, thread, cursor, parent, root_al, |
2384 | &cpumode, chain->nr - first_call); | |
2385 | if (err) | |
2386 | return (err < 0) ? err : 0; | |
2387 | } | |
bf8bddbf | 2388 | for (i = first_call, nr_entries = 0; |
a29d5c9b | 2389 | i < chain_nr && nr_entries < max_stack; i++) { |
3f067dca | 2390 | u64 ip; |
3f067dca ACM |
2391 | |
2392 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 2393 | j = i; |
3f067dca | 2394 | else |
a60335ba SB |
2395 | j = chain->nr - i - 1; |
2396 | ||
2397 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
2398 | if (j == skip_idx) | |
2399 | continue; | |
2400 | #endif | |
2401 | ip = chain->ips[j]; | |
bf8bddbf ACM |
2402 | if (ip < PERF_CONTEXT_MAX) |
2403 | ++nr_entries; | |
e9024d51 DM |
2404 | else if (callchain_param.order != ORDER_CALLEE) { |
2405 | err = find_prev_cpumode(chain, thread, cursor, parent, | |
2406 | root_al, &cpumode, j); | |
2407 | if (err) | |
2408 | return (err < 0) ? err : 0; | |
2409 | continue; | |
2410 | } | |
a29d5c9b | 2411 | |
410024db JY |
2412 | err = add_callchain_ip(thread, cursor, parent, |
2413 | root_al, &cpumode, ip, | |
c4ee0625 | 2414 | false, NULL, NULL, 0); |
3f067dca | 2415 | |
3f067dca | 2416 | if (err) |
2e77784b | 2417 | return (err < 0) ? err : 0; |
3f067dca ACM |
2418 | } |
2419 | ||
2420 | return 0; | |
2421 | } | |
2422 | ||
11ea2515 MW |
2423 | static int append_inlines(struct callchain_cursor *cursor, |
2424 | struct map *map, struct symbol *sym, u64 ip) | |
2425 | { | |
2426 | struct inline_node *inline_node; | |
2427 | struct inline_list *ilist; | |
2428 | u64 addr; | |
b38775cf | 2429 | int ret = 1; |
11ea2515 MW |
2430 | |
2431 | if (!symbol_conf.inline_name || !map || !sym) | |
b38775cf | 2432 | return ret; |
11ea2515 | 2433 | |
7a8a8fcf MW |
2434 | addr = map__map_ip(map, ip); |
2435 | addr = map__rip_2objdump(map, addr); | |
11ea2515 MW |
2436 | |
2437 | inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr); | |
2438 | if (!inline_node) { | |
2439 | inline_node = dso__parse_addr_inlines(map->dso, addr, sym); | |
2440 | if (!inline_node) | |
b38775cf | 2441 | return ret; |
11ea2515 MW |
2442 | inlines__tree_insert(&map->dso->inlined_nodes, inline_node); |
2443 | } | |
2444 | ||
2445 | list_for_each_entry(ilist, &inline_node->val, list) { | |
b38775cf MW |
2446 | ret = callchain_cursor_append(cursor, ip, map, |
2447 | ilist->symbol, false, | |
2448 | NULL, 0, 0, 0, ilist->srcline); | |
11ea2515 MW |
2449 | |
2450 | if (ret != 0) | |
2451 | return ret; | |
2452 | } | |
2453 | ||
b38775cf | 2454 | return ret; |
11ea2515 MW |
2455 | } |
2456 | ||
3f067dca ACM |
2457 | static int unwind_entry(struct unwind_entry *entry, void *arg) |
2458 | { | |
2459 | struct callchain_cursor *cursor = arg; | |
40a342cd | 2460 | const char *srcline = NULL; |
ff4ce288 | 2461 | u64 addr = entry->ip; |
b49a8fe5 NK |
2462 | |
2463 | if (symbol_conf.hide_unresolved && entry->sym == NULL) | |
2464 | return 0; | |
40a342cd | 2465 | |
11ea2515 MW |
2466 | if (append_inlines(cursor, entry->map, entry->sym, entry->ip) == 0) |
2467 | return 0; | |
2468 | ||
2a9d5050 SD |
2469 | /* |
2470 | * Convert entry->ip from a virtual address to an offset in | |
2471 | * its corresponding binary. | |
2472 | */ | |
ff4ce288 MW |
2473 | if (entry->map) |
2474 | addr = map__map_ip(entry->map, entry->ip); | |
2a9d5050 SD |
2475 | |
2476 | srcline = callchain_srcline(entry->map, entry->sym, addr); | |
3f067dca | 2477 | return callchain_cursor_append(cursor, entry->ip, |
410024db | 2478 | entry->map, entry->sym, |
40a342cd | 2479 | false, NULL, 0, 0, 0, srcline); |
3f067dca ACM |
2480 | } |
2481 | ||
9919a65e CP |
2482 | static int thread__resolve_callchain_unwind(struct thread *thread, |
2483 | struct callchain_cursor *cursor, | |
32dcd021 | 2484 | struct evsel *evsel, |
9919a65e CP |
2485 | struct perf_sample *sample, |
2486 | int max_stack) | |
3f067dca | 2487 | { |
3f067dca | 2488 | /* Can we do dwarf post unwind? */ |
1fc632ce JO |
2489 | if (!((evsel->core.attr.sample_type & PERF_SAMPLE_REGS_USER) && |
2490 | (evsel->core.attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
3f067dca ACM |
2491 | return 0; |
2492 | ||
2493 | /* Bail out if nothing was captured. */ | |
2494 | if ((!sample->user_regs.regs) || | |
2495 | (!sample->user_stack.size)) | |
2496 | return 0; | |
2497 | ||
91d7b2de | 2498 | return unwind__get_entries(unwind_entry, cursor, |
352ea45a | 2499 | thread, sample, max_stack); |
9919a65e | 2500 | } |
3f067dca | 2501 | |
9919a65e CP |
2502 | int thread__resolve_callchain(struct thread *thread, |
2503 | struct callchain_cursor *cursor, | |
32dcd021 | 2504 | struct evsel *evsel, |
9919a65e CP |
2505 | struct perf_sample *sample, |
2506 | struct symbol **parent, | |
2507 | struct addr_location *root_al, | |
2508 | int max_stack) | |
2509 | { | |
2510 | int ret = 0; | |
2511 | ||
914eb9ca | 2512 | callchain_cursor_reset(cursor); |
9919a65e CP |
2513 | |
2514 | if (callchain_param.order == ORDER_CALLEE) { | |
2515 | ret = thread__resolve_callchain_sample(thread, cursor, | |
2516 | evsel, sample, | |
2517 | parent, root_al, | |
2518 | max_stack); | |
2519 | if (ret) | |
2520 | return ret; | |
2521 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
2522 | evsel, sample, | |
2523 | max_stack); | |
2524 | } else { | |
2525 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
2526 | evsel, sample, | |
2527 | max_stack); | |
2528 | if (ret) | |
2529 | return ret; | |
2530 | ret = thread__resolve_callchain_sample(thread, cursor, | |
2531 | evsel, sample, | |
2532 | parent, root_al, | |
2533 | max_stack); | |
2534 | } | |
2535 | ||
2536 | return ret; | |
3f067dca | 2537 | } |
35feee19 DA |
2538 | |
2539 | int machine__for_each_thread(struct machine *machine, | |
2540 | int (*fn)(struct thread *thread, void *p), | |
2541 | void *priv) | |
2542 | { | |
91e467bc | 2543 | struct threads *threads; |
35feee19 DA |
2544 | struct rb_node *nd; |
2545 | struct thread *thread; | |
2546 | int rc = 0; | |
91e467bc | 2547 | int i; |
35feee19 | 2548 | |
91e467bc KL |
2549 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
2550 | threads = &machine->threads[i]; | |
f3acb3a8 DB |
2551 | for (nd = rb_first_cached(&threads->entries); nd; |
2552 | nd = rb_next(nd)) { | |
91e467bc KL |
2553 | thread = rb_entry(nd, struct thread, rb_node); |
2554 | rc = fn(thread, priv); | |
2555 | if (rc != 0) | |
2556 | return rc; | |
2557 | } | |
35feee19 | 2558 | |
91e467bc KL |
2559 | list_for_each_entry(thread, &threads->dead, node) { |
2560 | rc = fn(thread, priv); | |
2561 | if (rc != 0) | |
2562 | return rc; | |
2563 | } | |
35feee19 DA |
2564 | } |
2565 | return rc; | |
2566 | } | |
58d925dc | 2567 | |
a5499b37 AH |
2568 | int machines__for_each_thread(struct machines *machines, |
2569 | int (*fn)(struct thread *thread, void *p), | |
2570 | void *priv) | |
2571 | { | |
2572 | struct rb_node *nd; | |
2573 | int rc = 0; | |
2574 | ||
2575 | rc = machine__for_each_thread(&machines->host, fn, priv); | |
2576 | if (rc != 0) | |
2577 | return rc; | |
2578 | ||
f3acb3a8 | 2579 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
a5499b37 AH |
2580 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
2581 | ||
2582 | rc = machine__for_each_thread(machine, fn, priv); | |
2583 | if (rc != 0) | |
2584 | return rc; | |
2585 | } | |
2586 | return rc; | |
2587 | } | |
2588 | ||
b9d266ba AH |
2589 | pid_t machine__get_current_tid(struct machine *machine, int cpu) |
2590 | { | |
0a3c5537 | 2591 | int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS); |
8c727469 KM |
2592 | |
2593 | if (cpu < 0 || cpu >= nr_cpus || !machine->current_tid) | |
b9d266ba AH |
2594 | return -1; |
2595 | ||
2596 | return machine->current_tid[cpu]; | |
2597 | } | |
2598 | ||
2599 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
2600 | pid_t tid) | |
2601 | { | |
2602 | struct thread *thread; | |
0a3c5537 | 2603 | int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS); |
b9d266ba AH |
2604 | |
2605 | if (cpu < 0) | |
2606 | return -EINVAL; | |
2607 | ||
2608 | if (!machine->current_tid) { | |
2609 | int i; | |
2610 | ||
8c727469 | 2611 | machine->current_tid = calloc(nr_cpus, sizeof(pid_t)); |
b9d266ba AH |
2612 | if (!machine->current_tid) |
2613 | return -ENOMEM; | |
8c727469 | 2614 | for (i = 0; i < nr_cpus; i++) |
b9d266ba AH |
2615 | machine->current_tid[i] = -1; |
2616 | } | |
2617 | ||
8c727469 | 2618 | if (cpu >= nr_cpus) { |
b9d266ba AH |
2619 | pr_err("Requested CPU %d too large. ", cpu); |
2620 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
2621 | return -EINVAL; | |
2622 | } | |
2623 | ||
2624 | machine->current_tid[cpu] = tid; | |
2625 | ||
2626 | thread = machine__findnew_thread(machine, pid, tid); | |
2627 | if (!thread) | |
2628 | return -ENOMEM; | |
2629 | ||
2630 | thread->cpu = cpu; | |
b91fc39f | 2631 | thread__put(thread); |
b9d266ba AH |
2632 | |
2633 | return 0; | |
2634 | } | |
fbe2af45 | 2635 | |
dbbd34a6 AH |
2636 | /* |
2637 | * Compares the raw arch string. N.B. see instead perf_env__arch() if a | |
2638 | * normalized arch is needed. | |
2639 | */ | |
2640 | bool machine__is(struct machine *machine, const char *arch) | |
2641 | { | |
2642 | return machine && !strcmp(perf_env__raw_arch(machine->env), arch); | |
2643 | } | |
2644 | ||
9cecca32 AH |
2645 | int machine__nr_cpus_avail(struct machine *machine) |
2646 | { | |
2647 | return machine ? perf_env__nr_cpus_avail(machine->env) : 0; | |
2648 | } | |
2649 | ||
fbe2af45 AH |
2650 | int machine__get_kernel_start(struct machine *machine) |
2651 | { | |
a5e813c6 | 2652 | struct map *map = machine__kernel_map(machine); |
fbe2af45 AH |
2653 | int err = 0; |
2654 | ||
2655 | /* | |
2656 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
2657 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
2658 | * all addresses including kernel addresses are less than 2^32. In | |
2659 | * that case (32-bit system), if the kernel mapping is unknown, all | |
2660 | * addresses will be assumed to be in user space - see | |
2661 | * machine__kernel_ip(). | |
2662 | */ | |
2663 | machine->kernel_start = 1ULL << 63; | |
2664 | if (map) { | |
be39db9f | 2665 | err = map__load(map); |
19422a9f AH |
2666 | /* |
2667 | * On x86_64, PTI entry trampolines are less than the | |
2668 | * start of kernel text, but still above 2^63. So leave | |
2669 | * kernel_start = 1ULL << 63 for x86_64. | |
2670 | */ | |
2671 | if (!err && !machine__is(machine, "x86_64")) | |
fbe2af45 AH |
2672 | machine->kernel_start = map->start; |
2673 | } | |
2674 | return err; | |
2675 | } | |
aa7cc2ae | 2676 | |
8e80ad99 AH |
2677 | u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr) |
2678 | { | |
2679 | u8 addr_cpumode = cpumode; | |
2680 | bool kernel_ip; | |
2681 | ||
2682 | if (!machine->single_address_space) | |
2683 | goto out; | |
2684 | ||
2685 | kernel_ip = machine__kernel_ip(machine, addr); | |
2686 | switch (cpumode) { | |
2687 | case PERF_RECORD_MISC_KERNEL: | |
2688 | case PERF_RECORD_MISC_USER: | |
2689 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_KERNEL : | |
2690 | PERF_RECORD_MISC_USER; | |
2691 | break; | |
2692 | case PERF_RECORD_MISC_GUEST_KERNEL: | |
2693 | case PERF_RECORD_MISC_GUEST_USER: | |
2694 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_GUEST_KERNEL : | |
2695 | PERF_RECORD_MISC_GUEST_USER; | |
2696 | break; | |
2697 | default: | |
2698 | break; | |
2699 | } | |
2700 | out: | |
2701 | return addr_cpumode; | |
2702 | } | |
2703 | ||
aa7cc2ae ACM |
2704 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) |
2705 | { | |
e8807844 | 2706 | return dsos__findnew(&machine->dsos, filename); |
aa7cc2ae | 2707 | } |
c3168b0d ACM |
2708 | |
2709 | char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) | |
2710 | { | |
2711 | struct machine *machine = vmachine; | |
2712 | struct map *map; | |
107cad95 | 2713 | struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map); |
c3168b0d ACM |
2714 | |
2715 | if (sym == NULL) | |
2716 | return NULL; | |
2717 | ||
2718 | *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL; | |
2719 | *addrp = map->unmap_ip(map, sym->start); | |
2720 | return sym->name; | |
2721 | } |