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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 | ||
93730f85 ACM |
45 | static struct dso *machine__kernel_dso(struct machine *machine) |
46 | { | |
47 | return machine->vmlinux_map->dso; | |
48 | } | |
49 | ||
e167f995 ACM |
50 | static void dsos__init(struct dsos *dsos) |
51 | { | |
52 | INIT_LIST_HEAD(&dsos->head); | |
53 | dsos->root = RB_ROOT; | |
0a7c74ea | 54 | init_rwsem(&dsos->lock); |
e167f995 ACM |
55 | } |
56 | ||
91e467bc KL |
57 | static void machine__threads_init(struct machine *machine) |
58 | { | |
59 | int i; | |
60 | ||
61 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
62 | struct threads *threads = &machine->threads[i]; | |
f3acb3a8 | 63 | threads->entries = RB_ROOT_CACHED; |
0a7c74ea | 64 | init_rwsem(&threads->lock); |
91e467bc KL |
65 | threads->nr = 0; |
66 | INIT_LIST_HEAD(&threads->dead); | |
67 | threads->last_match = NULL; | |
68 | } | |
69 | } | |
70 | ||
8c7f1bb3 JO |
71 | static int machine__set_mmap_name(struct machine *machine) |
72 | { | |
c192524e JO |
73 | if (machine__is_host(machine)) |
74 | machine->mmap_name = strdup("[kernel.kallsyms]"); | |
75 | else if (machine__is_default_guest(machine)) | |
76 | machine->mmap_name = strdup("[guest.kernel.kallsyms]"); | |
77 | else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]", | |
78 | machine->pid) < 0) | |
79 | machine->mmap_name = NULL; | |
8c7f1bb3 JO |
80 | |
81 | return machine->mmap_name ? 0 : -ENOMEM; | |
82 | } | |
83 | ||
69d2591a ACM |
84 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
85 | { | |
81f981d7 JO |
86 | int err = -ENOMEM; |
87 | ||
93b0ba3c | 88 | memset(machine, 0, sizeof(*machine)); |
79b6bb73 | 89 | maps__init(&machine->kmaps, machine); |
69d2591a | 90 | RB_CLEAR_NODE(&machine->rb_node); |
3d39ac53 | 91 | dsos__init(&machine->dsos); |
69d2591a | 92 | |
91e467bc | 93 | machine__threads_init(machine); |
69d2591a | 94 | |
d027b640 | 95 | machine->vdso_info = NULL; |
4cde998d | 96 | machine->env = NULL; |
d027b640 | 97 | |
69d2591a ACM |
98 | machine->pid = pid; |
99 | ||
14bd6d20 | 100 | machine->id_hdr_size = 0; |
caf8a0d0 | 101 | machine->kptr_restrict_warned = false; |
cfe1c414 | 102 | machine->comm_exec = false; |
fbe2af45 | 103 | machine->kernel_start = 0; |
3183f8ca | 104 | machine->vmlinux_map = NULL; |
cc1121ab | 105 | |
69d2591a ACM |
106 | machine->root_dir = strdup(root_dir); |
107 | if (machine->root_dir == NULL) | |
108 | return -ENOMEM; | |
109 | ||
8c7f1bb3 JO |
110 | if (machine__set_mmap_name(machine)) |
111 | goto out; | |
112 | ||
69d2591a | 113 | if (pid != HOST_KERNEL_ID) { |
1fcb8768 | 114 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 115 | pid); |
69d2591a ACM |
116 | char comm[64]; |
117 | ||
118 | if (thread == NULL) | |
81f981d7 | 119 | goto out; |
69d2591a ACM |
120 | |
121 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 122 | thread__set_comm(thread, comm, 0); |
b91fc39f | 123 | thread__put(thread); |
69d2591a ACM |
124 | } |
125 | ||
b9d266ba | 126 | machine->current_tid = NULL; |
81f981d7 | 127 | err = 0; |
b9d266ba | 128 | |
81f981d7 | 129 | out: |
8c7f1bb3 | 130 | if (err) { |
81f981d7 | 131 | zfree(&machine->root_dir); |
8c7f1bb3 JO |
132 | zfree(&machine->mmap_name); |
133 | } | |
69d2591a ACM |
134 | return 0; |
135 | } | |
136 | ||
8fb598e5 DA |
137 | struct machine *machine__new_host(void) |
138 | { | |
139 | struct machine *machine = malloc(sizeof(*machine)); | |
140 | ||
141 | if (machine != NULL) { | |
142 | machine__init(machine, "", HOST_KERNEL_ID); | |
143 | ||
144 | if (machine__create_kernel_maps(machine) < 0) | |
145 | goto out_delete; | |
146 | } | |
147 | ||
148 | return machine; | |
149 | out_delete: | |
150 | free(machine); | |
151 | return NULL; | |
152 | } | |
153 | ||
7d132caa ACM |
154 | struct machine *machine__new_kallsyms(void) |
155 | { | |
156 | struct machine *machine = machine__new_host(); | |
157 | /* | |
158 | * FIXME: | |
adba1634 | 159 | * 1) We should switch to machine__load_kallsyms(), i.e. not explicitly |
7d132caa ACM |
160 | * ask for not using the kcore parsing code, once this one is fixed |
161 | * to create a map per module. | |
162 | */ | |
329f0ade | 163 | if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) { |
7d132caa ACM |
164 | machine__delete(machine); |
165 | machine = NULL; | |
166 | } | |
167 | ||
168 | return machine; | |
169 | } | |
170 | ||
d3a7c489 | 171 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
172 | { |
173 | struct dso *pos, *n; | |
174 | ||
0a7c74ea | 175 | down_write(&dsos->lock); |
e8807844 | 176 | |
8fa7d87f | 177 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 178 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 179 | pos->root = NULL; |
d3a7c489 ACM |
180 | list_del_init(&pos->node); |
181 | dso__put(pos); | |
69d2591a | 182 | } |
e8807844 | 183 | |
0a7c74ea | 184 | up_write(&dsos->lock); |
d3a7c489 | 185 | } |
e8807844 | 186 | |
d3a7c489 ACM |
187 | static void dsos__exit(struct dsos *dsos) |
188 | { | |
189 | dsos__purge(dsos); | |
0a7c74ea | 190 | exit_rwsem(&dsos->lock); |
69d2591a ACM |
191 | } |
192 | ||
3f067dca ACM |
193 | void machine__delete_threads(struct machine *machine) |
194 | { | |
b91fc39f | 195 | struct rb_node *nd; |
91e467bc | 196 | int i; |
3f067dca | 197 | |
91e467bc KL |
198 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
199 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea | 200 | down_write(&threads->lock); |
f3acb3a8 | 201 | nd = rb_first_cached(&threads->entries); |
91e467bc KL |
202 | while (nd) { |
203 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
3f067dca | 204 | |
91e467bc KL |
205 | nd = rb_next(nd); |
206 | __machine__remove_thread(machine, t, false); | |
207 | } | |
0a7c74ea | 208 | up_write(&threads->lock); |
3f067dca ACM |
209 | } |
210 | } | |
211 | ||
69d2591a ACM |
212 | void machine__exit(struct machine *machine) |
213 | { | |
91e467bc KL |
214 | int i; |
215 | ||
19993b82 ACM |
216 | if (machine == NULL) |
217 | return; | |
218 | ||
ebe9729c | 219 | machine__destroy_kernel_maps(machine); |
79b6bb73 | 220 | maps__exit(&machine->kmaps); |
e8807844 | 221 | dsos__exit(&machine->dsos); |
9a4388c7 | 222 | machine__exit_vdso(machine); |
04662523 | 223 | zfree(&machine->root_dir); |
8c7f1bb3 | 224 | zfree(&machine->mmap_name); |
b9d266ba | 225 | zfree(&machine->current_tid); |
91e467bc KL |
226 | |
227 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
228 | struct threads *threads = &machine->threads[i]; | |
4c00af0e ACM |
229 | struct thread *thread, *n; |
230 | /* | |
231 | * Forget about the dead, at this point whatever threads were | |
232 | * left in the dead lists better have a reference count taken | |
233 | * by who is using them, and then, when they drop those references | |
234 | * and it finally hits zero, thread__put() will check and see that | |
235 | * its not in the dead threads list and will not try to remove it | |
236 | * from there, just calling thread__delete() straight away. | |
237 | */ | |
238 | list_for_each_entry_safe(thread, n, &threads->dead, node) | |
239 | list_del_init(&thread->node); | |
240 | ||
0a7c74ea | 241 | exit_rwsem(&threads->lock); |
91e467bc | 242 | } |
69d2591a ACM |
243 | } |
244 | ||
245 | void machine__delete(struct machine *machine) | |
246 | { | |
32ca678d ACM |
247 | if (machine) { |
248 | machine__exit(machine); | |
249 | free(machine); | |
250 | } | |
69d2591a ACM |
251 | } |
252 | ||
876650e6 ACM |
253 | void machines__init(struct machines *machines) |
254 | { | |
255 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
f3acb3a8 | 256 | machines->guests = RB_ROOT_CACHED; |
876650e6 ACM |
257 | } |
258 | ||
259 | void machines__exit(struct machines *machines) | |
260 | { | |
261 | machine__exit(&machines->host); | |
262 | /* XXX exit guest */ | |
263 | } | |
264 | ||
265 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
266 | const char *root_dir) |
267 | { | |
f3acb3a8 | 268 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
269 | struct rb_node *parent = NULL; |
270 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
f3acb3a8 | 271 | bool leftmost = true; |
69d2591a ACM |
272 | |
273 | if (machine == NULL) | |
274 | return NULL; | |
275 | ||
276 | if (machine__init(machine, root_dir, pid) != 0) { | |
277 | free(machine); | |
278 | return NULL; | |
279 | } | |
280 | ||
281 | while (*p != NULL) { | |
282 | parent = *p; | |
283 | pos = rb_entry(parent, struct machine, rb_node); | |
284 | if (pid < pos->pid) | |
285 | p = &(*p)->rb_left; | |
f3acb3a8 | 286 | else { |
69d2591a | 287 | p = &(*p)->rb_right; |
f3acb3a8 DB |
288 | leftmost = false; |
289 | } | |
69d2591a ACM |
290 | } |
291 | ||
292 | rb_link_node(&machine->rb_node, parent, p); | |
f3acb3a8 | 293 | rb_insert_color_cached(&machine->rb_node, &machines->guests, leftmost); |
69d2591a ACM |
294 | |
295 | return machine; | |
296 | } | |
297 | ||
cfe1c414 AH |
298 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
299 | { | |
300 | struct rb_node *nd; | |
301 | ||
302 | machines->host.comm_exec = comm_exec; | |
303 | ||
f3acb3a8 | 304 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
cfe1c414 AH |
305 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
306 | ||
307 | machine->comm_exec = comm_exec; | |
308 | } | |
309 | } | |
310 | ||
876650e6 | 311 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 312 | { |
f3acb3a8 | 313 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
314 | struct rb_node *parent = NULL; |
315 | struct machine *machine; | |
316 | struct machine *default_machine = NULL; | |
317 | ||
876650e6 ACM |
318 | if (pid == HOST_KERNEL_ID) |
319 | return &machines->host; | |
320 | ||
69d2591a ACM |
321 | while (*p != NULL) { |
322 | parent = *p; | |
323 | machine = rb_entry(parent, struct machine, rb_node); | |
324 | if (pid < machine->pid) | |
325 | p = &(*p)->rb_left; | |
326 | else if (pid > machine->pid) | |
327 | p = &(*p)->rb_right; | |
328 | else | |
329 | return machine; | |
330 | if (!machine->pid) | |
331 | default_machine = machine; | |
332 | } | |
333 | ||
334 | return default_machine; | |
335 | } | |
336 | ||
876650e6 | 337 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
338 | { |
339 | char path[PATH_MAX]; | |
340 | const char *root_dir = ""; | |
341 | struct machine *machine = machines__find(machines, pid); | |
342 | ||
343 | if (machine && (machine->pid == pid)) | |
344 | goto out; | |
345 | ||
346 | if ((pid != HOST_KERNEL_ID) && | |
347 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
348 | (symbol_conf.guestmount)) { | |
349 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
350 | if (access(path, R_OK)) { | |
351 | static struct strlist *seen; | |
352 | ||
353 | if (!seen) | |
4a77e218 | 354 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
355 | |
356 | if (!strlist__has_entry(seen, path)) { | |
357 | pr_err("Can't access file %s\n", path); | |
358 | strlist__add(seen, path); | |
359 | } | |
360 | machine = NULL; | |
361 | goto out; | |
362 | } | |
363 | root_dir = path; | |
364 | } | |
365 | ||
366 | machine = machines__add(machines, pid, root_dir); | |
367 | out: | |
368 | return machine; | |
369 | } | |
370 | ||
876650e6 ACM |
371 | void machines__process_guests(struct machines *machines, |
372 | machine__process_t process, void *data) | |
69d2591a ACM |
373 | { |
374 | struct rb_node *nd; | |
375 | ||
f3acb3a8 | 376 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
377 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
378 | process(pos, data); | |
379 | } | |
380 | } | |
381 | ||
876650e6 | 382 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
383 | { |
384 | struct rb_node *node; | |
385 | struct machine *machine; | |
386 | ||
876650e6 ACM |
387 | machines->host.id_hdr_size = id_hdr_size; |
388 | ||
f3acb3a8 DB |
389 | for (node = rb_first_cached(&machines->guests); node; |
390 | node = rb_next(node)) { | |
69d2591a ACM |
391 | machine = rb_entry(node, struct machine, rb_node); |
392 | machine->id_hdr_size = id_hdr_size; | |
393 | } | |
394 | ||
395 | return; | |
396 | } | |
397 | ||
29ce3612 AH |
398 | static void machine__update_thread_pid(struct machine *machine, |
399 | struct thread *th, pid_t pid) | |
400 | { | |
401 | struct thread *leader; | |
402 | ||
403 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
404 | return; | |
405 | ||
406 | th->pid_ = pid; | |
407 | ||
408 | if (th->pid_ == th->tid) | |
409 | return; | |
410 | ||
b91fc39f | 411 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
412 | if (!leader) |
413 | goto out_err; | |
414 | ||
fe87797d ACM |
415 | if (!leader->maps) |
416 | leader->maps = maps__new(machine); | |
29ce3612 | 417 | |
fe87797d | 418 | if (!leader->maps) |
29ce3612 AH |
419 | goto out_err; |
420 | ||
fe87797d | 421 | if (th->maps == leader->maps) |
29ce3612 AH |
422 | return; |
423 | ||
fe87797d | 424 | if (th->maps) { |
29ce3612 AH |
425 | /* |
426 | * Maps are created from MMAP events which provide the pid and | |
427 | * tid. Consequently there never should be any maps on a thread | |
428 | * with an unknown pid. Just print an error if there are. | |
429 | */ | |
fe87797d | 430 | if (!maps__empty(th->maps)) |
29ce3612 AH |
431 | pr_err("Discarding thread maps for %d:%d\n", |
432 | th->pid_, th->tid); | |
fe87797d | 433 | maps__put(th->maps); |
29ce3612 AH |
434 | } |
435 | ||
fe87797d | 436 | th->maps = maps__get(leader->maps); |
abd82868 ACM |
437 | out_put: |
438 | thread__put(leader); | |
29ce3612 | 439 | return; |
29ce3612 AH |
440 | out_err: |
441 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
abd82868 | 442 | goto out_put; |
29ce3612 AH |
443 | } |
444 | ||
abd82868 | 445 | /* |
f8b2ebb5 JO |
446 | * Front-end cache - TID lookups come in blocks, |
447 | * so most of the time we dont have to look up | |
448 | * the full rbtree: | |
abd82868 | 449 | */ |
f8b2ebb5 | 450 | static struct thread* |
b57334b9 JO |
451 | __threads__get_last_match(struct threads *threads, struct machine *machine, |
452 | int pid, int tid) | |
9d2f8e22 | 453 | { |
9d2f8e22 ACM |
454 | struct thread *th; |
455 | ||
91e467bc | 456 | th = threads->last_match; |
f3b623b8 ACM |
457 | if (th != NULL) { |
458 | if (th->tid == tid) { | |
459 | machine__update_thread_pid(machine, th, pid); | |
abd82868 | 460 | return thread__get(th); |
f3b623b8 ACM |
461 | } |
462 | ||
91e467bc | 463 | threads->last_match = NULL; |
99d725fc | 464 | } |
9d2f8e22 | 465 | |
f8b2ebb5 JO |
466 | return NULL; |
467 | } | |
468 | ||
b57334b9 JO |
469 | static struct thread* |
470 | threads__get_last_match(struct threads *threads, struct machine *machine, | |
471 | int pid, int tid) | |
472 | { | |
473 | struct thread *th = NULL; | |
474 | ||
475 | if (perf_singlethreaded) | |
476 | th = __threads__get_last_match(threads, machine, pid, tid); | |
477 | ||
478 | return th; | |
479 | } | |
480 | ||
67fda0f3 | 481 | static void |
b57334b9 | 482 | __threads__set_last_match(struct threads *threads, struct thread *th) |
67fda0f3 JO |
483 | { |
484 | threads->last_match = th; | |
485 | } | |
486 | ||
b57334b9 JO |
487 | static void |
488 | threads__set_last_match(struct threads *threads, struct thread *th) | |
489 | { | |
490 | if (perf_singlethreaded) | |
491 | __threads__set_last_match(threads, th); | |
492 | } | |
493 | ||
f8b2ebb5 JO |
494 | /* |
495 | * Caller must eventually drop thread->refcnt returned with a successful | |
496 | * lookup/new thread inserted. | |
497 | */ | |
498 | static struct thread *____machine__findnew_thread(struct machine *machine, | |
499 | struct threads *threads, | |
500 | pid_t pid, pid_t tid, | |
501 | bool create) | |
502 | { | |
f3acb3a8 | 503 | struct rb_node **p = &threads->entries.rb_root.rb_node; |
f8b2ebb5 JO |
504 | struct rb_node *parent = NULL; |
505 | struct thread *th; | |
f3acb3a8 | 506 | bool leftmost = true; |
f8b2ebb5 JO |
507 | |
508 | th = threads__get_last_match(threads, machine, pid, tid); | |
509 | if (th) | |
510 | return th; | |
511 | ||
9d2f8e22 ACM |
512 | while (*p != NULL) { |
513 | parent = *p; | |
514 | th = rb_entry(parent, struct thread, rb_node); | |
515 | ||
38051234 | 516 | if (th->tid == tid) { |
67fda0f3 | 517 | threads__set_last_match(threads, th); |
29ce3612 | 518 | machine__update_thread_pid(machine, th, pid); |
abd82868 | 519 | return thread__get(th); |
9d2f8e22 ACM |
520 | } |
521 | ||
38051234 | 522 | if (tid < th->tid) |
9d2f8e22 | 523 | p = &(*p)->rb_left; |
f3acb3a8 | 524 | else { |
9d2f8e22 | 525 | p = &(*p)->rb_right; |
f3acb3a8 DB |
526 | leftmost = false; |
527 | } | |
9d2f8e22 ACM |
528 | } |
529 | ||
530 | if (!create) | |
531 | return NULL; | |
532 | ||
99d725fc | 533 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
534 | if (th != NULL) { |
535 | rb_link_node(&th->rb_node, parent, p); | |
f3acb3a8 | 536 | rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost); |
cddcef60 JO |
537 | |
538 | /* | |
79b6bb73 | 539 | * We have to initialize maps separately after rb tree is updated. |
cddcef60 JO |
540 | * |
541 | * The reason is that we call machine__findnew_thread | |
79b6bb73 | 542 | * within thread__init_maps to find the thread |
cddcef60 JO |
543 | * leader and that would screwed the rb tree. |
544 | */ | |
79b6bb73 | 545 | if (thread__init_maps(th, machine)) { |
f3acb3a8 | 546 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 547 | RB_CLEAR_NODE(&th->rb_node); |
abd82868 | 548 | thread__put(th); |
cddcef60 | 549 | return NULL; |
418029b7 | 550 | } |
f3b623b8 ACM |
551 | /* |
552 | * It is now in the rbtree, get a ref | |
553 | */ | |
554 | thread__get(th); | |
67fda0f3 | 555 | threads__set_last_match(threads, th); |
91e467bc | 556 | ++threads->nr; |
9d2f8e22 ACM |
557 | } |
558 | ||
559 | return th; | |
560 | } | |
561 | ||
b91fc39f ACM |
562 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
563 | { | |
75e45e43 | 564 | return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true); |
b91fc39f ACM |
565 | } |
566 | ||
314add6b AH |
567 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
568 | pid_t tid) | |
9d2f8e22 | 569 | { |
91e467bc | 570 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f ACM |
571 | struct thread *th; |
572 | ||
0a7c74ea | 573 | down_write(&threads->lock); |
abd82868 | 574 | th = __machine__findnew_thread(machine, pid, tid); |
0a7c74ea | 575 | up_write(&threads->lock); |
b91fc39f | 576 | return th; |
9d2f8e22 ACM |
577 | } |
578 | ||
d75e6097 JO |
579 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
580 | pid_t tid) | |
9d2f8e22 | 581 | { |
91e467bc | 582 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f | 583 | struct thread *th; |
91e467bc | 584 | |
0a7c74ea | 585 | down_read(&threads->lock); |
75e45e43 | 586 | th = ____machine__findnew_thread(machine, threads, pid, tid, false); |
0a7c74ea | 587 | up_read(&threads->lock); |
b91fc39f | 588 | return th; |
9d2f8e22 | 589 | } |
b0a7d1a0 | 590 | |
cfe1c414 AH |
591 | struct comm *machine__thread_exec_comm(struct machine *machine, |
592 | struct thread *thread) | |
593 | { | |
594 | if (machine->comm_exec) | |
595 | return thread__exec_comm(thread); | |
596 | else | |
597 | return thread__comm(thread); | |
598 | } | |
599 | ||
162f0bef FW |
600 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
601 | struct perf_sample *sample) | |
b0a7d1a0 | 602 | { |
314add6b AH |
603 | struct thread *thread = machine__findnew_thread(machine, |
604 | event->comm.pid, | |
605 | event->comm.tid); | |
65de51f9 | 606 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 607 | int err = 0; |
b0a7d1a0 | 608 | |
cfe1c414 AH |
609 | if (exec) |
610 | machine->comm_exec = true; | |
611 | ||
b0a7d1a0 ACM |
612 | if (dump_trace) |
613 | perf_event__fprintf_comm(event, stdout); | |
614 | ||
65de51f9 AH |
615 | if (thread == NULL || |
616 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 617 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 618 | err = -1; |
b0a7d1a0 ACM |
619 | } |
620 | ||
b91fc39f ACM |
621 | thread__put(thread); |
622 | ||
623 | return err; | |
b0a7d1a0 ACM |
624 | } |
625 | ||
f3b3614a HB |
626 | int machine__process_namespaces_event(struct machine *machine __maybe_unused, |
627 | union perf_event *event, | |
628 | struct perf_sample *sample __maybe_unused) | |
629 | { | |
630 | struct thread *thread = machine__findnew_thread(machine, | |
631 | event->namespaces.pid, | |
632 | event->namespaces.tid); | |
633 | int err = 0; | |
634 | ||
635 | WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES, | |
636 | "\nWARNING: kernel seems to support more namespaces than perf" | |
637 | " tool.\nTry updating the perf tool..\n\n"); | |
638 | ||
639 | WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES, | |
640 | "\nWARNING: perf tool seems to support more namespaces than" | |
641 | " the kernel.\nTry updating the kernel..\n\n"); | |
642 | ||
643 | if (dump_trace) | |
644 | perf_event__fprintf_namespaces(event, stdout); | |
645 | ||
646 | if (thread == NULL || | |
647 | thread__set_namespaces(thread, sample->time, &event->namespaces)) { | |
648 | dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n"); | |
649 | err = -1; | |
650 | } | |
651 | ||
652 | thread__put(thread); | |
653 | ||
654 | return err; | |
655 | } | |
656 | ||
b0a7d1a0 | 657 | int machine__process_lost_event(struct machine *machine __maybe_unused, |
162f0bef | 658 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 | 659 | { |
5290ed69 | 660 | dump_printf(": id:%" PRI_lu64 ": lost:%" PRI_lu64 "\n", |
b0a7d1a0 ACM |
661 | event->lost.id, event->lost.lost); |
662 | return 0; | |
663 | } | |
664 | ||
c4937a91 KL |
665 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
666 | union perf_event *event, struct perf_sample *sample) | |
667 | { | |
a2e254d8 | 668 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n", |
c4937a91 KL |
669 | sample->id, event->lost_samples.lost); |
670 | return 0; | |
671 | } | |
672 | ||
9f2de315 ACM |
673 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
674 | struct kmod_path *m, | |
675 | const char *filename) | |
da17ea33 JO |
676 | { |
677 | struct dso *dso; | |
da17ea33 | 678 | |
0a7c74ea | 679 | down_write(&machine->dsos.lock); |
e8807844 ACM |
680 | |
681 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 682 | if (!dso) { |
e8807844 | 683 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 684 | if (dso == NULL) |
e8807844 | 685 | goto out_unlock; |
da17ea33 | 686 | |
6b335e8f | 687 | dso__set_module_info(dso, m, machine); |
ca33380a | 688 | dso__set_long_name(dso, strdup(filename), true); |
da17ea33 JO |
689 | } |
690 | ||
d3a7c489 | 691 | dso__get(dso); |
e8807844 | 692 | out_unlock: |
0a7c74ea | 693 | up_write(&machine->dsos.lock); |
da17ea33 JO |
694 | return dso; |
695 | } | |
696 | ||
4a96f7a0 AH |
697 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
698 | union perf_event *event) | |
699 | { | |
700 | if (dump_trace) | |
701 | perf_event__fprintf_aux(event, stdout); | |
702 | return 0; | |
703 | } | |
704 | ||
0ad21f68 AH |
705 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
706 | union perf_event *event) | |
707 | { | |
708 | if (dump_trace) | |
709 | perf_event__fprintf_itrace_start(event, stdout); | |
710 | return 0; | |
711 | } | |
712 | ||
0286039f AH |
713 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
714 | union perf_event *event) | |
715 | { | |
716 | if (dump_trace) | |
717 | perf_event__fprintf_switch(event, stdout); | |
718 | return 0; | |
719 | } | |
720 | ||
9aa0bfa3 SL |
721 | static int machine__process_ksymbol_register(struct machine *machine, |
722 | union perf_event *event, | |
723 | struct perf_sample *sample __maybe_unused) | |
724 | { | |
725 | struct symbol *sym; | |
79b6bb73 | 726 | struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr); |
9aa0bfa3 | 727 | |
9aa0bfa3 | 728 | if (!map) { |
ebdba16e | 729 | map = dso__new_map(event->ksymbol.name); |
9aa0bfa3 SL |
730 | if (!map) |
731 | return -ENOMEM; | |
732 | ||
ebdba16e ACM |
733 | map->start = event->ksymbol.addr; |
734 | map->end = map->start + event->ksymbol.len; | |
79b6bb73 | 735 | maps__insert(&machine->kmaps, map); |
9aa0bfa3 SL |
736 | } |
737 | ||
8529f2e6 | 738 | sym = symbol__new(map->map_ip(map, map->start), |
ebdba16e ACM |
739 | event->ksymbol.len, |
740 | 0, 0, event->ksymbol.name); | |
9aa0bfa3 SL |
741 | if (!sym) |
742 | return -ENOMEM; | |
743 | dso__insert_symbol(map->dso, sym); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | static int machine__process_ksymbol_unregister(struct machine *machine, | |
748 | union perf_event *event, | |
749 | struct perf_sample *sample __maybe_unused) | |
750 | { | |
751 | struct map *map; | |
752 | ||
79b6bb73 | 753 | map = maps__find(&machine->kmaps, event->ksymbol.addr); |
9aa0bfa3 | 754 | if (map) |
79b6bb73 | 755 | maps__remove(&machine->kmaps, map); |
9aa0bfa3 SL |
756 | |
757 | return 0; | |
758 | } | |
759 | ||
760 | int machine__process_ksymbol(struct machine *machine __maybe_unused, | |
761 | union perf_event *event, | |
762 | struct perf_sample *sample) | |
763 | { | |
764 | if (dump_trace) | |
765 | perf_event__fprintf_ksymbol(event, stdout); | |
766 | ||
ebdba16e | 767 | if (event->ksymbol.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER) |
9aa0bfa3 SL |
768 | return machine__process_ksymbol_unregister(machine, event, |
769 | sample); | |
770 | return machine__process_ksymbol_register(machine, event, sample); | |
771 | } | |
772 | ||
a94ab91a ACM |
773 | static struct map *machine__addnew_module_map(struct machine *machine, u64 start, |
774 | const char *filename) | |
3f067dca | 775 | { |
ca33380a | 776 | struct map *map = NULL; |
ca33380a | 777 | struct kmod_path m; |
a94ab91a | 778 | struct dso *dso; |
3f067dca | 779 | |
ca33380a | 780 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
781 | return NULL; |
782 | ||
9f2de315 | 783 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
784 | if (dso == NULL) |
785 | goto out; | |
786 | ||
3183f8ca | 787 | map = map__new2(start, dso); |
3f067dca | 788 | if (map == NULL) |
ca33380a | 789 | goto out; |
3f067dca | 790 | |
79b6bb73 | 791 | maps__insert(&machine->kmaps, map); |
ca33380a | 792 | |
79b6bb73 | 793 | /* Put the map here because maps__insert alread got it */ |
9afcb420 | 794 | map__put(map); |
ca33380a | 795 | out: |
566c69c3 MH |
796 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
797 | dso__put(dso); | |
d8f9da24 | 798 | zfree(&m.name); |
3f067dca ACM |
799 | return map; |
800 | } | |
801 | ||
876650e6 | 802 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
803 | { |
804 | struct rb_node *nd; | |
3d39ac53 | 805 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 806 | |
f3acb3a8 | 807 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 808 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 809 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
810 | } |
811 | ||
812 | return ret; | |
813 | } | |
814 | ||
8fa7d87f | 815 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
816 | bool (skip)(struct dso *dso, int parm), int parm) |
817 | { | |
3d39ac53 | 818 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
819 | } |
820 | ||
876650e6 | 821 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
822 | bool (skip)(struct dso *dso, int parm), int parm) |
823 | { | |
824 | struct rb_node *nd; | |
876650e6 | 825 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 826 | |
f3acb3a8 | 827 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
828 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
829 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
830 | } | |
831 | return ret; | |
832 | } | |
833 | ||
834 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
835 | { | |
836 | int i; | |
837 | size_t printed = 0; | |
93730f85 | 838 | struct dso *kdso = machine__kernel_dso(machine); |
3f067dca ACM |
839 | |
840 | if (kdso->has_build_id) { | |
841 | char filename[PATH_MAX]; | |
d2396999 KJ |
842 | if (dso__build_id_filename(kdso, filename, sizeof(filename), |
843 | false)) | |
3f067dca ACM |
844 | printed += fprintf(fp, "[0] %s\n", filename); |
845 | } | |
846 | ||
847 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
848 | printed += fprintf(fp, "[%d] %s\n", | |
849 | i + kdso->has_build_id, vmlinux_path[i]); | |
850 | ||
851 | return printed; | |
852 | } | |
853 | ||
854 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
855 | { | |
3f067dca | 856 | struct rb_node *nd; |
91e467bc KL |
857 | size_t ret; |
858 | int i; | |
3f067dca | 859 | |
91e467bc KL |
860 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
861 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea ACM |
862 | |
863 | down_read(&threads->lock); | |
d2c11034 | 864 | |
91e467bc | 865 | ret = fprintf(fp, "Threads: %u\n", threads->nr); |
3f067dca | 866 | |
f3acb3a8 DB |
867 | for (nd = rb_first_cached(&threads->entries); nd; |
868 | nd = rb_next(nd)) { | |
91e467bc | 869 | struct thread *pos = rb_entry(nd, struct thread, rb_node); |
3f067dca | 870 | |
91e467bc KL |
871 | ret += thread__fprintf(pos, fp); |
872 | } | |
b91fc39f | 873 | |
0a7c74ea | 874 | up_read(&threads->lock); |
91e467bc | 875 | } |
3f067dca ACM |
876 | return ret; |
877 | } | |
878 | ||
879 | static struct dso *machine__get_kernel(struct machine *machine) | |
880 | { | |
8c7f1bb3 | 881 | const char *vmlinux_name = machine->mmap_name; |
3f067dca ACM |
882 | struct dso *kernel; |
883 | ||
884 | if (machine__is_host(machine)) { | |
c192524e JO |
885 | if (symbol_conf.vmlinux_name) |
886 | vmlinux_name = symbol_conf.vmlinux_name; | |
887 | ||
459ce518 ACM |
888 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
889 | "[kernel]", DSO_TYPE_KERNEL); | |
3f067dca | 890 | } else { |
c192524e JO |
891 | if (symbol_conf.default_guest_vmlinux_name) |
892 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
893 | ||
459ce518 ACM |
894 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
895 | "[guest.kernel]", | |
896 | DSO_TYPE_GUEST_KERNEL); | |
3f067dca ACM |
897 | } |
898 | ||
899 | if (kernel != NULL && (!kernel->has_build_id)) | |
900 | dso__read_running_kernel_build_id(kernel, machine); | |
901 | ||
902 | return kernel; | |
903 | } | |
904 | ||
905 | struct process_args { | |
906 | u64 start; | |
907 | }; | |
908 | ||
1c5aae77 AH |
909 | void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
910 | size_t bufsz) | |
15a0a870 AH |
911 | { |
912 | if (machine__is_default_guest(machine)) | |
913 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
914 | else | |
915 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
916 | } | |
917 | ||
a93f0e55 SQ |
918 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
919 | ||
920 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
921 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
922 | * symbol_name if it's not that important. | |
923 | */ | |
b843f62a | 924 | static int machine__get_running_kernel_start(struct machine *machine, |
ed9adb20 JO |
925 | const char **symbol_name, |
926 | u64 *start, u64 *end) | |
3f067dca | 927 | { |
15a0a870 | 928 | char filename[PATH_MAX]; |
b843f62a | 929 | int i, err = -1; |
a93f0e55 SQ |
930 | const char *name; |
931 | u64 addr = 0; | |
3f067dca | 932 | |
15a0a870 | 933 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
934 | |
935 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
936 | return 0; | |
937 | ||
a93f0e55 | 938 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
b843f62a ACM |
939 | err = kallsyms__get_function_start(filename, name, &addr); |
940 | if (!err) | |
a93f0e55 SQ |
941 | break; |
942 | } | |
943 | ||
b843f62a ACM |
944 | if (err) |
945 | return -1; | |
946 | ||
a93f0e55 SQ |
947 | if (symbol_name) |
948 | *symbol_name = name; | |
3f067dca | 949 | |
b843f62a | 950 | *start = addr; |
ed9adb20 JO |
951 | |
952 | err = kallsyms__get_function_start(filename, "_etext", &addr); | |
953 | if (!err) | |
954 | *end = addr; | |
955 | ||
b843f62a | 956 | return 0; |
3f067dca ACM |
957 | } |
958 | ||
1c5aae77 AH |
959 | int machine__create_extra_kernel_map(struct machine *machine, |
960 | struct dso *kernel, | |
961 | struct extra_kernel_map *xm) | |
4d99e413 AH |
962 | { |
963 | struct kmap *kmap; | |
964 | struct map *map; | |
965 | ||
966 | map = map__new2(xm->start, kernel); | |
967 | if (!map) | |
968 | return -1; | |
969 | ||
970 | map->end = xm->end; | |
971 | map->pgoff = xm->pgoff; | |
972 | ||
973 | kmap = map__kmap(map); | |
974 | ||
975 | kmap->kmaps = &machine->kmaps; | |
5759a682 | 976 | strlcpy(kmap->name, xm->name, KMAP_NAME_LEN); |
4d99e413 | 977 | |
79b6bb73 | 978 | maps__insert(&machine->kmaps, map); |
4d99e413 | 979 | |
5759a682 AH |
980 | pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n", |
981 | kmap->name, map->start, map->end); | |
4d99e413 AH |
982 | |
983 | map__put(map); | |
984 | ||
985 | return 0; | |
986 | } | |
987 | ||
988 | static u64 find_entry_trampoline(struct dso *dso) | |
989 | { | |
990 | /* Duplicates are removed so lookup all aliases */ | |
991 | const char *syms[] = { | |
992 | "_entry_trampoline", | |
993 | "__entry_trampoline_start", | |
994 | "entry_SYSCALL_64_trampoline", | |
995 | }; | |
996 | struct symbol *sym = dso__first_symbol(dso); | |
997 | unsigned int i; | |
998 | ||
999 | for (; sym; sym = dso__next_symbol(sym)) { | |
1000 | if (sym->binding != STB_GLOBAL) | |
1001 | continue; | |
1002 | for (i = 0; i < ARRAY_SIZE(syms); i++) { | |
1003 | if (!strcmp(sym->name, syms[i])) | |
1004 | return sym->start; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
1011 | /* | |
1012 | * These values can be used for kernels that do not have symbols for the entry | |
1013 | * trampolines in kallsyms. | |
1014 | */ | |
1015 | #define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL | |
1016 | #define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000 | |
1017 | #define X86_64_ENTRY_TRAMPOLINE 0x6000 | |
1018 | ||
1019 | /* Map x86_64 PTI entry trampolines */ | |
1020 | int machine__map_x86_64_entry_trampolines(struct machine *machine, | |
1021 | struct dso *kernel) | |
1022 | { | |
79b6bb73 | 1023 | struct maps *kmaps = &machine->kmaps; |
4d99e413 | 1024 | int nr_cpus_avail, cpu; |
1c5aae77 AH |
1025 | bool found = false; |
1026 | struct map *map; | |
1027 | u64 pgoff; | |
1028 | ||
1029 | /* | |
1030 | * In the vmlinux case, pgoff is a virtual address which must now be | |
1031 | * mapped to a vmlinux offset. | |
1032 | */ | |
79b6bb73 | 1033 | maps__for_each_entry(kmaps, map) { |
1c5aae77 AH |
1034 | struct kmap *kmap = __map__kmap(map); |
1035 | struct map *dest_map; | |
1036 | ||
1037 | if (!kmap || !is_entry_trampoline(kmap->name)) | |
1038 | continue; | |
1039 | ||
79b6bb73 | 1040 | dest_map = maps__find(kmaps, map->pgoff); |
1c5aae77 AH |
1041 | if (dest_map != map) |
1042 | map->pgoff = dest_map->map_ip(dest_map, map->pgoff); | |
1043 | found = true; | |
1044 | } | |
1045 | if (found || machine->trampolines_mapped) | |
1046 | return 0; | |
4d99e413 | 1047 | |
1c5aae77 | 1048 | pgoff = find_entry_trampoline(kernel); |
4d99e413 AH |
1049 | if (!pgoff) |
1050 | return 0; | |
1051 | ||
1052 | nr_cpus_avail = machine__nr_cpus_avail(machine); | |
1053 | ||
1054 | /* Add a 1 page map for each CPU's entry trampoline */ | |
1055 | for (cpu = 0; cpu < nr_cpus_avail; cpu++) { | |
1056 | u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU + | |
1057 | cpu * X86_64_CPU_ENTRY_AREA_SIZE + | |
1058 | X86_64_ENTRY_TRAMPOLINE; | |
1059 | struct extra_kernel_map xm = { | |
1060 | .start = va, | |
1061 | .end = va + page_size, | |
1062 | .pgoff = pgoff, | |
1063 | }; | |
1064 | ||
5759a682 AH |
1065 | strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN); |
1066 | ||
4d99e413 AH |
1067 | if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0) |
1068 | return -1; | |
1069 | } | |
1070 | ||
1c5aae77 AH |
1071 | machine->trampolines_mapped = nr_cpus_avail; |
1072 | ||
1073 | return 0; | |
1074 | } | |
1075 | ||
1076 | int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused, | |
1077 | struct dso *kernel __maybe_unused) | |
1078 | { | |
4d99e413 AH |
1079 | return 0; |
1080 | } | |
1081 | ||
1fb87b8e JO |
1082 | static int |
1083 | __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
3f067dca | 1084 | { |
3183f8ca ACM |
1085 | struct kmap *kmap; |
1086 | struct map *map; | |
3f067dca | 1087 | |
cc1121ab MH |
1088 | /* In case of renewal the kernel map, destroy previous one */ |
1089 | machine__destroy_kernel_maps(machine); | |
1090 | ||
3183f8ca ACM |
1091 | machine->vmlinux_map = map__new2(0, kernel); |
1092 | if (machine->vmlinux_map == NULL) | |
1093 | return -1; | |
3f067dca | 1094 | |
3183f8ca ACM |
1095 | machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip; |
1096 | map = machine__kernel_map(machine); | |
1097 | kmap = map__kmap(map); | |
1098 | if (!kmap) | |
1099 | return -1; | |
ba92732e | 1100 | |
3183f8ca | 1101 | kmap->kmaps = &machine->kmaps; |
79b6bb73 | 1102 | maps__insert(&machine->kmaps, map); |
3f067dca ACM |
1103 | |
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | void machine__destroy_kernel_maps(struct machine *machine) | |
1108 | { | |
3183f8ca ACM |
1109 | struct kmap *kmap; |
1110 | struct map *map = machine__kernel_map(machine); | |
3f067dca | 1111 | |
3183f8ca ACM |
1112 | if (map == NULL) |
1113 | return; | |
3f067dca | 1114 | |
3183f8ca | 1115 | kmap = map__kmap(map); |
79b6bb73 | 1116 | maps__remove(&machine->kmaps, map); |
3183f8ca ACM |
1117 | if (kmap && kmap->ref_reloc_sym) { |
1118 | zfree((char **)&kmap->ref_reloc_sym->name); | |
1119 | zfree(&kmap->ref_reloc_sym); | |
3f067dca | 1120 | } |
3183f8ca ACM |
1121 | |
1122 | map__zput(machine->vmlinux_map); | |
3f067dca ACM |
1123 | } |
1124 | ||
876650e6 | 1125 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
1126 | { |
1127 | int ret = 0; | |
1128 | struct dirent **namelist = NULL; | |
1129 | int i, items = 0; | |
1130 | char path[PATH_MAX]; | |
1131 | pid_t pid; | |
1132 | char *endp; | |
1133 | ||
1134 | if (symbol_conf.default_guest_vmlinux_name || | |
1135 | symbol_conf.default_guest_modules || | |
1136 | symbol_conf.default_guest_kallsyms) { | |
1137 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
1138 | } | |
1139 | ||
1140 | if (symbol_conf.guestmount) { | |
1141 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
1142 | if (items <= 0) | |
1143 | return -ENOENT; | |
1144 | for (i = 0; i < items; i++) { | |
1145 | if (!isdigit(namelist[i]->d_name[0])) { | |
1146 | /* Filter out . and .. */ | |
1147 | continue; | |
1148 | } | |
1149 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
1150 | if ((*endp != '\0') || | |
1151 | (endp == namelist[i]->d_name) || | |
1152 | (errno == ERANGE)) { | |
1153 | pr_debug("invalid directory (%s). Skipping.\n", | |
1154 | namelist[i]->d_name); | |
1155 | continue; | |
1156 | } | |
1157 | sprintf(path, "%s/%s/proc/kallsyms", | |
1158 | symbol_conf.guestmount, | |
1159 | namelist[i]->d_name); | |
1160 | ret = access(path, R_OK); | |
1161 | if (ret) { | |
1162 | pr_debug("Can't access file %s\n", path); | |
1163 | goto failure; | |
1164 | } | |
1165 | machines__create_kernel_maps(machines, pid); | |
1166 | } | |
1167 | failure: | |
1168 | free(namelist); | |
1169 | } | |
1170 | ||
1171 | return ret; | |
1172 | } | |
1173 | ||
876650e6 | 1174 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 1175 | { |
f3acb3a8 | 1176 | struct rb_node *next = rb_first_cached(&machines->guests); |
876650e6 ACM |
1177 | |
1178 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
1179 | |
1180 | while (next) { | |
1181 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
1182 | ||
1183 | next = rb_next(&pos->rb_node); | |
f3acb3a8 | 1184 | rb_erase_cached(&pos->rb_node, &machines->guests); |
3f067dca ACM |
1185 | machine__delete(pos); |
1186 | } | |
1187 | } | |
1188 | ||
876650e6 | 1189 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
1190 | { |
1191 | struct machine *machine = machines__findnew(machines, pid); | |
1192 | ||
1193 | if (machine == NULL) | |
1194 | return -1; | |
1195 | ||
1196 | return machine__create_kernel_maps(machine); | |
1197 | } | |
1198 | ||
3183f8ca | 1199 | int machine__load_kallsyms(struct machine *machine, const char *filename) |
3f067dca | 1200 | { |
a5e813c6 | 1201 | struct map *map = machine__kernel_map(machine); |
e8f3879f | 1202 | int ret = __dso__load_kallsyms(map->dso, filename, map, true); |
3f067dca ACM |
1203 | |
1204 | if (ret > 0) { | |
3183f8ca | 1205 | dso__set_loaded(map->dso); |
3f067dca ACM |
1206 | /* |
1207 | * Since /proc/kallsyms will have multiple sessions for the | |
1208 | * kernel, with modules between them, fixup the end of all | |
1209 | * sections. | |
1210 | */ | |
79b6bb73 | 1211 | maps__fixup_end(&machine->kmaps); |
3f067dca ACM |
1212 | } |
1213 | ||
1214 | return ret; | |
1215 | } | |
1216 | ||
1d1a2654 | 1217 | int machine__load_vmlinux_path(struct machine *machine) |
3f067dca | 1218 | { |
a5e813c6 | 1219 | struct map *map = machine__kernel_map(machine); |
be39db9f | 1220 | int ret = dso__load_vmlinux_path(map->dso, map); |
3f067dca | 1221 | |
39b12f78 | 1222 | if (ret > 0) |
3183f8ca | 1223 | dso__set_loaded(map->dso); |
3f067dca ACM |
1224 | |
1225 | return ret; | |
1226 | } | |
1227 | ||
3f067dca ACM |
1228 | static char *get_kernel_version(const char *root_dir) |
1229 | { | |
1230 | char version[PATH_MAX]; | |
1231 | FILE *file; | |
1232 | char *name, *tmp; | |
1233 | const char *prefix = "Linux version "; | |
1234 | ||
1235 | sprintf(version, "%s/proc/version", root_dir); | |
1236 | file = fopen(version, "r"); | |
1237 | if (!file) | |
1238 | return NULL; | |
1239 | ||
3f067dca ACM |
1240 | tmp = fgets(version, sizeof(version), file); |
1241 | fclose(file); | |
34b65aff DY |
1242 | if (!tmp) |
1243 | return NULL; | |
3f067dca ACM |
1244 | |
1245 | name = strstr(version, prefix); | |
1246 | if (!name) | |
1247 | return NULL; | |
1248 | name += strlen(prefix); | |
1249 | tmp = strchr(name, ' '); | |
1250 | if (tmp) | |
1251 | *tmp = '\0'; | |
1252 | ||
1253 | return strdup(name); | |
1254 | } | |
1255 | ||
bb58a8a4 JO |
1256 | static bool is_kmod_dso(struct dso *dso) |
1257 | { | |
1258 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1259 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1260 | } | |
1261 | ||
9a29ceee | 1262 | static int maps__set_module_path(struct maps *maps, const char *path, struct kmod_path *m) |
bb58a8a4 | 1263 | { |
bb58a8a4 | 1264 | char *long_name; |
9a29ceee | 1265 | struct map *map = maps__find_by_name(maps, m->name); |
bb58a8a4 | 1266 | |
bb58a8a4 JO |
1267 | if (map == NULL) |
1268 | return 0; | |
1269 | ||
1270 | long_name = strdup(path); | |
1271 | if (long_name == NULL) | |
1272 | return -ENOMEM; | |
1273 | ||
1274 | dso__set_long_name(map->dso, long_name, true); | |
1275 | dso__kernel_module_get_build_id(map->dso, ""); | |
1276 | ||
1277 | /* | |
1278 | * Full name could reveal us kmod compression, so | |
1279 | * we need to update the symtab_type if needed. | |
1280 | */ | |
2af52475 | 1281 | if (m->comp && is_kmod_dso(map->dso)) { |
bb58a8a4 | 1282 | map->dso->symtab_type++; |
2af52475 JO |
1283 | map->dso->comp = m->comp; |
1284 | } | |
bb58a8a4 JO |
1285 | |
1286 | return 0; | |
1287 | } | |
1288 | ||
9a29ceee | 1289 | static int maps__set_modules_path_dir(struct maps *maps, const char *dir_name, int depth) |
3f067dca ACM |
1290 | { |
1291 | struct dirent *dent; | |
1292 | DIR *dir = opendir(dir_name); | |
1293 | int ret = 0; | |
1294 | ||
1295 | if (!dir) { | |
1296 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1297 | return -1; | |
1298 | } | |
1299 | ||
1300 | while ((dent = readdir(dir)) != NULL) { | |
1301 | char path[PATH_MAX]; | |
1302 | struct stat st; | |
1303 | ||
1304 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1305 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1306 | if (stat(path, &st)) | |
1307 | continue; | |
1308 | ||
1309 | if (S_ISDIR(st.st_mode)) { | |
1310 | if (!strcmp(dent->d_name, ".") || | |
1311 | !strcmp(dent->d_name, "..")) | |
1312 | continue; | |
1313 | ||
61d4290c RY |
1314 | /* Do not follow top-level source and build symlinks */ |
1315 | if (depth == 0) { | |
1316 | if (!strcmp(dent->d_name, "source") || | |
1317 | !strcmp(dent->d_name, "build")) | |
1318 | continue; | |
1319 | } | |
1320 | ||
9a29ceee | 1321 | ret = maps__set_modules_path_dir(maps, path, depth + 1); |
3f067dca ACM |
1322 | if (ret < 0) |
1323 | goto out; | |
1324 | } else { | |
bb58a8a4 | 1325 | struct kmod_path m; |
3f067dca | 1326 | |
bb58a8a4 JO |
1327 | ret = kmod_path__parse_name(&m, dent->d_name); |
1328 | if (ret) | |
1329 | goto out; | |
c00c48fc | 1330 | |
bb58a8a4 | 1331 | if (m.kmod) |
9a29ceee | 1332 | ret = maps__set_module_path(maps, path, &m); |
c00c48fc | 1333 | |
d8f9da24 | 1334 | zfree(&m.name); |
3f067dca | 1335 | |
bb58a8a4 | 1336 | if (ret) |
3f067dca | 1337 | goto out; |
3f067dca ACM |
1338 | } |
1339 | } | |
1340 | ||
1341 | out: | |
1342 | closedir(dir); | |
1343 | return ret; | |
1344 | } | |
1345 | ||
1346 | static int machine__set_modules_path(struct machine *machine) | |
1347 | { | |
1348 | char *version; | |
1349 | char modules_path[PATH_MAX]; | |
1350 | ||
1351 | version = get_kernel_version(machine->root_dir); | |
1352 | if (!version) | |
1353 | return -1; | |
1354 | ||
61d4290c | 1355 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1356 | machine->root_dir, version); |
1357 | free(version); | |
1358 | ||
79b6bb73 | 1359 | return maps__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca | 1360 | } |
203d8a4a | 1361 | int __weak arch__fix_module_text_start(u64 *start __maybe_unused, |
12a6d294 | 1362 | u64 *size __maybe_unused, |
203d8a4a SSG |
1363 | const char *name __maybe_unused) |
1364 | { | |
1365 | return 0; | |
1366 | } | |
3f067dca | 1367 | |
9ad4652b TR |
1368 | static int machine__create_module(void *arg, const char *name, u64 start, |
1369 | u64 size) | |
3f067dca | 1370 | { |
316d70d6 | 1371 | struct machine *machine = arg; |
3f067dca | 1372 | struct map *map; |
316d70d6 | 1373 | |
12a6d294 | 1374 | if (arch__fix_module_text_start(&start, &size, name) < 0) |
203d8a4a SSG |
1375 | return -1; |
1376 | ||
a94ab91a | 1377 | map = machine__addnew_module_map(machine, start, name); |
316d70d6 AH |
1378 | if (map == NULL) |
1379 | return -1; | |
9ad4652b | 1380 | map->end = start + size; |
316d70d6 AH |
1381 | |
1382 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | static int machine__create_modules(struct machine *machine) | |
1388 | { | |
3f067dca ACM |
1389 | const char *modules; |
1390 | char path[PATH_MAX]; | |
1391 | ||
f4be904d | 1392 | if (machine__is_default_guest(machine)) { |
3f067dca | 1393 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1394 | } else { |
1395 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1396 | modules = path; |
1397 | } | |
1398 | ||
aa7fe3b0 | 1399 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1400 | return -1; |
1401 | ||
316d70d6 | 1402 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1403 | return -1; |
1404 | ||
316d70d6 AH |
1405 | if (!machine__set_modules_path(machine)) |
1406 | return 0; | |
3f067dca | 1407 | |
316d70d6 | 1408 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1409 | |
8f76fcd9 | 1410 | return 0; |
3f067dca ACM |
1411 | } |
1412 | ||
1fb87b8e JO |
1413 | static void machine__set_kernel_mmap(struct machine *machine, |
1414 | u64 start, u64 end) | |
1415 | { | |
3183f8ca ACM |
1416 | machine->vmlinux_map->start = start; |
1417 | machine->vmlinux_map->end = end; | |
1418 | /* | |
1419 | * Be a bit paranoid here, some perf.data file came with | |
1420 | * a zero sized synthesized MMAP event for the kernel. | |
1421 | */ | |
1422 | if (start == 0 && end == 0) | |
1423 | machine->vmlinux_map->end = ~0ULL; | |
1fb87b8e JO |
1424 | } |
1425 | ||
977c7a6d WL |
1426 | static void machine__update_kernel_mmap(struct machine *machine, |
1427 | u64 start, u64 end) | |
1428 | { | |
1429 | struct map *map = machine__kernel_map(machine); | |
1430 | ||
1431 | map__get(map); | |
79b6bb73 | 1432 | maps__remove(&machine->kmaps, map); |
977c7a6d WL |
1433 | |
1434 | machine__set_kernel_mmap(machine, start, end); | |
1435 | ||
79b6bb73 | 1436 | maps__insert(&machine->kmaps, map); |
977c7a6d WL |
1437 | map__put(map); |
1438 | } | |
1439 | ||
3f067dca ACM |
1440 | int machine__create_kernel_maps(struct machine *machine) |
1441 | { | |
1442 | struct dso *kernel = machine__get_kernel(machine); | |
b843f62a | 1443 | const char *name = NULL; |
ee05d217 | 1444 | struct map *map; |
ed9adb20 | 1445 | u64 start = 0, end = ~0ULL; |
1154c957 MH |
1446 | int ret; |
1447 | ||
45e90056 | 1448 | if (kernel == NULL) |
5512cf24 | 1449 | return -1; |
3f067dca | 1450 | |
1154c957 | 1451 | ret = __machine__create_kernel_maps(machine, kernel); |
1154c957 | 1452 | if (ret < 0) |
1c5aae77 | 1453 | goto out_put; |
3f067dca ACM |
1454 | |
1455 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1456 | if (machine__is_host(machine)) | |
1457 | pr_debug("Problems creating module maps, " | |
1458 | "continuing anyway...\n"); | |
1459 | else | |
1460 | pr_debug("Problems creating module maps for guest %d, " | |
1461 | "continuing anyway...\n", machine->pid); | |
1462 | } | |
1463 | ||
ed9adb20 | 1464 | if (!machine__get_running_kernel_start(machine, &name, &start, &end)) { |
3f938ee2 | 1465 | if (name && |
ed9adb20 | 1466 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, start)) { |
3f938ee2 | 1467 | machine__destroy_kernel_maps(machine); |
1c5aae77 AH |
1468 | ret = -1; |
1469 | goto out_put; | |
3f938ee2 | 1470 | } |
ee05d217 | 1471 | |
977c7a6d WL |
1472 | /* |
1473 | * we have a real start address now, so re-order the kmaps | |
1474 | * assume it's the last in the kmaps | |
1475 | */ | |
ed9adb20 | 1476 | machine__update_kernel_mmap(machine, start, end); |
5512cf24 AH |
1477 | } |
1478 | ||
1c5aae77 AH |
1479 | if (machine__create_extra_kernel_maps(machine, kernel)) |
1480 | pr_debug("Problems creating extra kernel maps, continuing anyway...\n"); | |
1481 | ||
ed9adb20 JO |
1482 | if (end == ~0ULL) { |
1483 | /* update end address of the kernel map using adjacent module address */ | |
1484 | map = map__next(machine__kernel_map(machine)); | |
1485 | if (map) | |
1486 | machine__set_kernel_mmap(machine, start, map->start); | |
1487 | } | |
1488 | ||
1c5aae77 AH |
1489 | out_put: |
1490 | dso__put(kernel); | |
1491 | return ret; | |
3f067dca ACM |
1492 | } |
1493 | ||
8e0cf965 AH |
1494 | static bool machine__uses_kcore(struct machine *machine) |
1495 | { | |
1496 | struct dso *dso; | |
1497 | ||
3d39ac53 | 1498 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1499 | if (dso__is_kcore(dso)) |
1500 | return true; | |
1501 | } | |
1502 | ||
1503 | return false; | |
1504 | } | |
1505 | ||
a8ce99b0 AH |
1506 | static bool perf_event__is_extra_kernel_mmap(struct machine *machine, |
1507 | union perf_event *event) | |
1508 | { | |
1509 | return machine__is(machine, "x86_64") && | |
1510 | is_entry_trampoline(event->mmap.filename); | |
1511 | } | |
1512 | ||
1513 | static int machine__process_extra_kernel_map(struct machine *machine, | |
1514 | union perf_event *event) | |
1515 | { | |
93730f85 | 1516 | struct dso *kernel = machine__kernel_dso(machine); |
a8ce99b0 AH |
1517 | struct extra_kernel_map xm = { |
1518 | .start = event->mmap.start, | |
1519 | .end = event->mmap.start + event->mmap.len, | |
1520 | .pgoff = event->mmap.pgoff, | |
1521 | }; | |
1522 | ||
1523 | if (kernel == NULL) | |
1524 | return -1; | |
1525 | ||
1526 | strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN); | |
1527 | ||
1528 | return machine__create_extra_kernel_map(machine, kernel, &xm); | |
1529 | } | |
1530 | ||
b0a7d1a0 ACM |
1531 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1532 | union perf_event *event) | |
1533 | { | |
1534 | struct map *map; | |
b0a7d1a0 ACM |
1535 | enum dso_kernel_type kernel_type; |
1536 | bool is_kernel_mmap; | |
1537 | ||
8e0cf965 AH |
1538 | /* If we have maps from kcore then we do not need or want any others */ |
1539 | if (machine__uses_kcore(machine)) | |
1540 | return 0; | |
1541 | ||
b0a7d1a0 ACM |
1542 | if (machine__is_host(machine)) |
1543 | kernel_type = DSO_TYPE_KERNEL; | |
1544 | else | |
1545 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1546 | ||
1547 | is_kernel_mmap = memcmp(event->mmap.filename, | |
8c7f1bb3 JO |
1548 | machine->mmap_name, |
1549 | strlen(machine->mmap_name) - 1) == 0; | |
b0a7d1a0 ACM |
1550 | if (event->mmap.filename[0] == '/' || |
1551 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
a94ab91a ACM |
1552 | map = machine__addnew_module_map(machine, event->mmap.start, |
1553 | event->mmap.filename); | |
b0a7d1a0 ACM |
1554 | if (map == NULL) |
1555 | goto out_problem; | |
1556 | ||
b0a7d1a0 ACM |
1557 | map->end = map->start + event->mmap.len; |
1558 | } else if (is_kernel_mmap) { | |
1559 | const char *symbol_name = (event->mmap.filename + | |
8c7f1bb3 | 1560 | strlen(machine->mmap_name)); |
b0a7d1a0 ACM |
1561 | /* |
1562 | * Should be there already, from the build-id table in | |
1563 | * the header. | |
1564 | */ | |
b837a8bd NK |
1565 | struct dso *kernel = NULL; |
1566 | struct dso *dso; | |
1567 | ||
0a7c74ea | 1568 | down_read(&machine->dsos.lock); |
e8807844 | 1569 | |
3d39ac53 | 1570 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1571 | |
1572 | /* | |
1573 | * The cpumode passed to is_kernel_module is not the | |
1574 | * cpumode of *this* event. If we insist on passing | |
1575 | * correct cpumode to is_kernel_module, we should | |
1576 | * record the cpumode when we adding this dso to the | |
1577 | * linked list. | |
1578 | * | |
1579 | * However we don't really need passing correct | |
1580 | * cpumode. We know the correct cpumode must be kernel | |
1581 | * mode (if not, we should not link it onto kernel_dsos | |
1582 | * list). | |
1583 | * | |
1584 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1585 | * is_kernel_module() treats it as a kernel cpumode. | |
1586 | */ | |
1587 | ||
1588 | if (!dso->kernel || | |
1589 | is_kernel_module(dso->long_name, | |
1590 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1591 | continue; |
1592 | ||
1f121b03 | 1593 | |
b837a8bd NK |
1594 | kernel = dso; |
1595 | break; | |
1596 | } | |
1597 | ||
0a7c74ea | 1598 | up_read(&machine->dsos.lock); |
e8807844 | 1599 | |
b837a8bd | 1600 | if (kernel == NULL) |
8c7f1bb3 | 1601 | kernel = machine__findnew_dso(machine, machine->mmap_name); |
b0a7d1a0 ACM |
1602 | if (kernel == NULL) |
1603 | goto out_problem; | |
1604 | ||
1605 | kernel->kernel = kernel_type; | |
d3a7c489 ACM |
1606 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1607 | dso__put(kernel); | |
b0a7d1a0 | 1608 | goto out_problem; |
d3a7c489 | 1609 | } |
b0a7d1a0 | 1610 | |
330dfa22 NK |
1611 | if (strstr(kernel->long_name, "vmlinux")) |
1612 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1613 | |
977c7a6d | 1614 | machine__update_kernel_mmap(machine, event->mmap.start, |
05db6ff7 | 1615 | event->mmap.start + event->mmap.len); |
b0a7d1a0 ACM |
1616 | |
1617 | /* | |
1618 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1619 | * symbol. Effectively having zero here means that at record | |
1620 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1621 | */ | |
1622 | if (event->mmap.pgoff != 0) { | |
3183f8ca ACM |
1623 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, |
1624 | symbol_name, | |
1625 | event->mmap.pgoff); | |
b0a7d1a0 ACM |
1626 | } |
1627 | ||
1628 | if (machine__is_default_guest(machine)) { | |
1629 | /* | |
1630 | * preload dso of guest kernel and modules | |
1631 | */ | |
be39db9f | 1632 | dso__load(kernel, machine__kernel_map(machine)); |
b0a7d1a0 | 1633 | } |
a8ce99b0 AH |
1634 | } else if (perf_event__is_extra_kernel_mmap(machine, event)) { |
1635 | return machine__process_extra_kernel_map(machine, event); | |
b0a7d1a0 ACM |
1636 | } |
1637 | return 0; | |
1638 | out_problem: | |
1639 | return -1; | |
1640 | } | |
1641 | ||
5c5e854b | 1642 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef | 1643 | union perf_event *event, |
473398a2 | 1644 | struct perf_sample *sample) |
5c5e854b | 1645 | { |
5c5e854b SE |
1646 | struct thread *thread; |
1647 | struct map *map; | |
4a7380a5 ACM |
1648 | struct dso_id dso_id = { |
1649 | .maj = event->mmap2.maj, | |
1650 | .min = event->mmap2.min, | |
1651 | .ino = event->mmap2.ino, | |
1652 | .ino_generation = event->mmap2.ino_generation, | |
1653 | }; | |
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, |
4a7380a5 | 1674 | &dso_id, event->mmap2.prot, |
7ef80703 | 1675 | event->mmap2.flags, |
3183f8ca | 1676 | event->mmap2.filename, thread); |
5c5e854b SE |
1677 | |
1678 | if (map == NULL) | |
b91fc39f | 1679 | goto out_problem_map; |
5c5e854b | 1680 | |
8132a2a8 HK |
1681 | ret = thread__insert_map(thread, map); |
1682 | if (ret) | |
1683 | goto out_problem_insert; | |
1684 | ||
b91fc39f | 1685 | thread__put(thread); |
84c2cafa | 1686 | map__put(map); |
5c5e854b SE |
1687 | return 0; |
1688 | ||
8132a2a8 HK |
1689 | out_problem_insert: |
1690 | map__put(map); | |
b91fc39f ACM |
1691 | out_problem_map: |
1692 | thread__put(thread); | |
5c5e854b SE |
1693 | out_problem: |
1694 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1695 | return 0; | |
1696 | } | |
1697 | ||
162f0bef | 1698 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
473398a2 | 1699 | struct perf_sample *sample) |
b0a7d1a0 | 1700 | { |
b0a7d1a0 ACM |
1701 | struct thread *thread; |
1702 | struct map *map; | |
0f476f2b | 1703 | u32 prot = 0; |
b0a7d1a0 ACM |
1704 | int ret = 0; |
1705 | ||
1706 | if (dump_trace) | |
1707 | perf_event__fprintf_mmap(event, stdout); | |
1708 | ||
473398a2 ACM |
1709 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1710 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
b0a7d1a0 ACM |
1711 | ret = machine__process_kernel_mmap_event(machine, event); |
1712 | if (ret < 0) | |
1713 | goto out_problem; | |
1714 | return 0; | |
1715 | } | |
1716 | ||
314add6b | 1717 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1718 | event->mmap.tid); |
b0a7d1a0 ACM |
1719 | if (thread == NULL) |
1720 | goto out_problem; | |
bad40917 | 1721 | |
3183f8ca | 1722 | if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA)) |
0f476f2b | 1723 | prot = PROT_EXEC; |
bad40917 | 1724 | |
2a03068c | 1725 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1726 | event->mmap.len, event->mmap.pgoff, |
4a7380a5 | 1727 | NULL, prot, 0, event->mmap.filename, thread); |
bad40917 | 1728 | |
b0a7d1a0 | 1729 | if (map == NULL) |
b91fc39f | 1730 | goto out_problem_map; |
b0a7d1a0 | 1731 | |
8132a2a8 HK |
1732 | ret = thread__insert_map(thread, map); |
1733 | if (ret) | |
1734 | goto out_problem_insert; | |
1735 | ||
b91fc39f | 1736 | thread__put(thread); |
84c2cafa | 1737 | map__put(map); |
b0a7d1a0 ACM |
1738 | return 0; |
1739 | ||
8132a2a8 HK |
1740 | out_problem_insert: |
1741 | map__put(map); | |
b91fc39f ACM |
1742 | out_problem_map: |
1743 | thread__put(thread); | |
b0a7d1a0 ACM |
1744 | out_problem: |
1745 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1746 | return 0; | |
1747 | } | |
1748 | ||
b91fc39f | 1749 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1750 | { |
91e467bc KL |
1751 | struct threads *threads = machine__threads(machine, th->tid); |
1752 | ||
1753 | if (threads->last_match == th) | |
67fda0f3 | 1754 | threads__set_last_match(threads, NULL); |
f3b623b8 | 1755 | |
b91fc39f | 1756 | if (lock) |
0a7c74ea | 1757 | down_write(&threads->lock); |
4c00af0e ACM |
1758 | |
1759 | BUG_ON(refcount_read(&th->refcnt) == 0); | |
1760 | ||
f3acb3a8 | 1761 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 1762 | RB_CLEAR_NODE(&th->rb_node); |
91e467bc | 1763 | --threads->nr; |
236a3bbd | 1764 | /* |
f3b623b8 ACM |
1765 | * Move it first to the dead_threads list, then drop the reference, |
1766 | * if this is the last reference, then the thread__delete destructor | |
1767 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd | 1768 | */ |
91e467bc | 1769 | list_add_tail(&th->node, &threads->dead); |
4c00af0e ACM |
1770 | |
1771 | /* | |
1772 | * We need to do the put here because if this is the last refcount, | |
1773 | * then we will be touching the threads->dead head when removing the | |
1774 | * thread. | |
1775 | */ | |
1776 | thread__put(th); | |
1777 | ||
b91fc39f | 1778 | if (lock) |
0a7c74ea | 1779 | up_write(&threads->lock); |
236a3bbd DA |
1780 | } |
1781 | ||
b91fc39f ACM |
1782 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1783 | { | |
1784 | return __machine__remove_thread(machine, th, true); | |
1785 | } | |
1786 | ||
162f0bef FW |
1787 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1788 | struct perf_sample *sample) | |
b0a7d1a0 | 1789 | { |
d75e6097 JO |
1790 | struct thread *thread = machine__find_thread(machine, |
1791 | event->fork.pid, | |
1792 | event->fork.tid); | |
314add6b AH |
1793 | struct thread *parent = machine__findnew_thread(machine, |
1794 | event->fork.ppid, | |
1795 | event->fork.ptid); | |
4f8f382e | 1796 | bool do_maps_clone = true; |
b91fc39f | 1797 | int err = 0; |
b0a7d1a0 | 1798 | |
5cb73340 AH |
1799 | if (dump_trace) |
1800 | perf_event__fprintf_task(event, stdout); | |
1801 | ||
1802 | /* | |
1803 | * There may be an existing thread that is not actually the parent, | |
1804 | * either because we are processing events out of order, or because the | |
1805 | * (fork) event that would have removed the thread was lost. Assume the | |
1806 | * latter case and continue on as best we can. | |
1807 | */ | |
1808 | if (parent->pid_ != (pid_t)event->fork.ppid) { | |
1809 | dump_printf("removing erroneous parent thread %d/%d\n", | |
1810 | parent->pid_, parent->tid); | |
1811 | machine__remove_thread(machine, parent); | |
1812 | thread__put(parent); | |
1813 | parent = machine__findnew_thread(machine, event->fork.ppid, | |
1814 | event->fork.ptid); | |
1815 | } | |
1816 | ||
236a3bbd | 1817 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1818 | if (thread != NULL) { |
236a3bbd | 1819 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1820 | thread__put(thread); |
1821 | } | |
236a3bbd | 1822 | |
314add6b AH |
1823 | thread = machine__findnew_thread(machine, event->fork.pid, |
1824 | event->fork.tid); | |
4f8f382e DM |
1825 | /* |
1826 | * When synthesizing FORK events, we are trying to create thread | |
1827 | * objects for the already running tasks on the machine. | |
1828 | * | |
1829 | * Normally, for a kernel FORK event, we want to clone the parent's | |
1830 | * maps because that is what the kernel just did. | |
1831 | * | |
1832 | * But when synthesizing, this should not be done. If we do, we end up | |
1833 | * with overlapping maps as we process the sythesized MMAP2 events that | |
1834 | * get delivered shortly thereafter. | |
1835 | * | |
1836 | * Use the FORK event misc flags in an internal way to signal this | |
1837 | * situation, so we can elide the map clone when appropriate. | |
1838 | */ | |
1839 | if (event->fork.header.misc & PERF_RECORD_MISC_FORK_EXEC) | |
1840 | do_maps_clone = false; | |
b0a7d1a0 ACM |
1841 | |
1842 | if (thread == NULL || parent == NULL || | |
4f8f382e | 1843 | thread__fork(thread, parent, sample->time, do_maps_clone) < 0) { |
b0a7d1a0 | 1844 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1845 | err = -1; |
b0a7d1a0 | 1846 | } |
b91fc39f ACM |
1847 | thread__put(thread); |
1848 | thread__put(parent); | |
b0a7d1a0 | 1849 | |
b91fc39f | 1850 | return err; |
b0a7d1a0 ACM |
1851 | } |
1852 | ||
162f0bef FW |
1853 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1854 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1855 | { |
d75e6097 JO |
1856 | struct thread *thread = machine__find_thread(machine, |
1857 | event->fork.pid, | |
1858 | event->fork.tid); | |
b0a7d1a0 ACM |
1859 | |
1860 | if (dump_trace) | |
1861 | perf_event__fprintf_task(event, stdout); | |
1862 | ||
b91fc39f | 1863 | if (thread != NULL) { |
236a3bbd | 1864 | thread__exited(thread); |
b91fc39f ACM |
1865 | thread__put(thread); |
1866 | } | |
b0a7d1a0 ACM |
1867 | |
1868 | return 0; | |
1869 | } | |
1870 | ||
162f0bef FW |
1871 | int machine__process_event(struct machine *machine, union perf_event *event, |
1872 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1873 | { |
1874 | int ret; | |
1875 | ||
1876 | switch (event->header.type) { | |
1877 | case PERF_RECORD_COMM: | |
162f0bef | 1878 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1879 | case PERF_RECORD_MMAP: |
162f0bef | 1880 | ret = machine__process_mmap_event(machine, event, sample); break; |
f3b3614a HB |
1881 | case PERF_RECORD_NAMESPACES: |
1882 | ret = machine__process_namespaces_event(machine, event, sample); break; | |
5c5e854b | 1883 | case PERF_RECORD_MMAP2: |
162f0bef | 1884 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1885 | case PERF_RECORD_FORK: |
162f0bef | 1886 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1887 | case PERF_RECORD_EXIT: |
162f0bef | 1888 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1889 | case PERF_RECORD_LOST: |
162f0bef | 1890 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1891 | case PERF_RECORD_AUX: |
1892 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 | 1893 | case PERF_RECORD_ITRACE_START: |
ceb92913 | 1894 | ret = machine__process_itrace_start_event(machine, event); break; |
c4937a91 KL |
1895 | case PERF_RECORD_LOST_SAMPLES: |
1896 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0286039f AH |
1897 | case PERF_RECORD_SWITCH: |
1898 | case PERF_RECORD_SWITCH_CPU_WIDE: | |
1899 | ret = machine__process_switch_event(machine, event); break; | |
9aa0bfa3 SL |
1900 | case PERF_RECORD_KSYMBOL: |
1901 | ret = machine__process_ksymbol(machine, event, sample); break; | |
45178a92 | 1902 | case PERF_RECORD_BPF_EVENT: |
3f604b5f | 1903 | ret = machine__process_bpf(machine, event, sample); break; |
b0a7d1a0 ACM |
1904 | default: |
1905 | ret = -1; | |
1906 | break; | |
1907 | } | |
1908 | ||
1909 | return ret; | |
1910 | } | |
3f067dca | 1911 | |
b21484f1 | 1912 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1913 | { |
a7c3899c | 1914 | if (!regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1915 | return 1; |
3f067dca ACM |
1916 | return 0; |
1917 | } | |
1918 | ||
bb871a9c | 1919 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1920 | struct addr_map_symbol *ams, |
1921 | u64 ip) | |
1922 | { | |
1923 | struct addr_location al; | |
3f067dca ACM |
1924 | |
1925 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1926 | /* |
1927 | * We cannot use the header.misc hint to determine whether a | |
1928 | * branch stack address is user, kernel, guest, hypervisor. | |
1929 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1930 | * Thus, we have to try consecutively until we find a match | |
1931 | * or else, the symbol is unknown | |
1932 | */ | |
26bd9331 | 1933 | thread__find_cpumode_addr_location(thread, ip, &al); |
3f067dca | 1934 | |
3f067dca ACM |
1935 | ams->addr = ip; |
1936 | ams->al_addr = al.addr; | |
f2eaea09 | 1937 | ams->ms.maps = al.maps; |
d46a4cdf ACM |
1938 | ams->ms.sym = al.sym; |
1939 | ams->ms.map = al.map; | |
8780fb25 | 1940 | ams->phys_addr = 0; |
3f067dca ACM |
1941 | } |
1942 | ||
bb871a9c | 1943 | static void ip__resolve_data(struct thread *thread, |
8780fb25 KL |
1944 | u8 m, struct addr_map_symbol *ams, |
1945 | u64 addr, u64 phys_addr) | |
98a3b32c SE |
1946 | { |
1947 | struct addr_location al; | |
1948 | ||
1949 | memset(&al, 0, sizeof(al)); | |
1950 | ||
117d3c24 | 1951 | thread__find_symbol(thread, m, addr, &al); |
06b2afc0 | 1952 | |
98a3b32c SE |
1953 | ams->addr = addr; |
1954 | ams->al_addr = al.addr; | |
f2eaea09 | 1955 | ams->ms.maps = al.maps; |
d46a4cdf ACM |
1956 | ams->ms.sym = al.sym; |
1957 | ams->ms.map = al.map; | |
8780fb25 | 1958 | ams->phys_addr = phys_addr; |
98a3b32c SE |
1959 | } |
1960 | ||
e80faac0 ACM |
1961 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1962 | struct addr_location *al) | |
98a3b32c | 1963 | { |
9f87498f | 1964 | struct mem_info *mi = mem_info__new(); |
98a3b32c SE |
1965 | |
1966 | if (!mi) | |
1967 | return NULL; | |
1968 | ||
bb871a9c | 1969 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
8780fb25 KL |
1970 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, |
1971 | sample->addr, sample->phys_addr); | |
98a3b32c SE |
1972 | mi->data_src.val = sample->data_src; |
1973 | ||
1974 | return mi; | |
1975 | } | |
1976 | ||
5f0fef8a | 1977 | static char *callchain_srcline(struct map_symbol *ms, u64 ip) |
40a342cd | 1978 | { |
5f0fef8a | 1979 | struct map *map = ms->map; |
21ac9d54 MW |
1980 | char *srcline = NULL; |
1981 | ||
40a342cd | 1982 | if (!map || callchain_param.key == CCKEY_FUNCTION) |
21ac9d54 MW |
1983 | return srcline; |
1984 | ||
1985 | srcline = srcline__tree_find(&map->dso->srclines, ip); | |
1986 | if (!srcline) { | |
1987 | bool show_sym = false; | |
1988 | bool show_addr = callchain_param.key == CCKEY_ADDRESS; | |
1989 | ||
1990 | srcline = get_srcline(map->dso, map__rip_2objdump(map, ip), | |
5f0fef8a | 1991 | ms->sym, show_sym, show_addr, ip); |
21ac9d54 MW |
1992 | srcline__tree_insert(&map->dso->srclines, ip, srcline); |
1993 | } | |
40a342cd | 1994 | |
21ac9d54 | 1995 | return srcline; |
40a342cd MW |
1996 | } |
1997 | ||
c4ee0625 JY |
1998 | struct iterations { |
1999 | int nr_loop_iter; | |
2000 | u64 cycles; | |
2001 | }; | |
2002 | ||
37592b8a | 2003 | static int add_callchain_ip(struct thread *thread, |
91d7b2de | 2004 | struct callchain_cursor *cursor, |
37592b8a AK |
2005 | struct symbol **parent, |
2006 | struct addr_location *root_al, | |
73dbcd65 | 2007 | u8 *cpumode, |
410024db JY |
2008 | u64 ip, |
2009 | bool branch, | |
2010 | struct branch_flags *flags, | |
c4ee0625 | 2011 | struct iterations *iter, |
b851dd49 | 2012 | u64 branch_from) |
37592b8a | 2013 | { |
5f0fef8a | 2014 | struct map_symbol ms; |
37592b8a | 2015 | struct addr_location al; |
c4ee0625 JY |
2016 | int nr_loop_iter = 0; |
2017 | u64 iter_cycles = 0; | |
40a342cd | 2018 | const char *srcline = NULL; |
37592b8a AK |
2019 | |
2020 | al.filtered = 0; | |
2021 | al.sym = NULL; | |
73dbcd65 | 2022 | if (!cpumode) { |
26bd9331 | 2023 | thread__find_cpumode_addr_location(thread, ip, &al); |
73dbcd65 | 2024 | } else { |
2e77784b KL |
2025 | if (ip >= PERF_CONTEXT_MAX) { |
2026 | switch (ip) { | |
2027 | case PERF_CONTEXT_HV: | |
73dbcd65 | 2028 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
2029 | break; |
2030 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 2031 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
2032 | break; |
2033 | case PERF_CONTEXT_USER: | |
73dbcd65 | 2034 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
2035 | break; |
2036 | default: | |
2037 | pr_debug("invalid callchain context: " | |
2038 | "%"PRId64"\n", (s64) ip); | |
2039 | /* | |
2040 | * It seems the callchain is corrupted. | |
2041 | * Discard all. | |
2042 | */ | |
91d7b2de | 2043 | callchain_cursor_reset(cursor); |
2e77784b KL |
2044 | return 1; |
2045 | } | |
2046 | return 0; | |
2047 | } | |
4546263d | 2048 | thread__find_symbol(thread, *cpumode, ip, &al); |
2e77784b KL |
2049 | } |
2050 | ||
37592b8a | 2051 | if (al.sym != NULL) { |
de7e6a7c | 2052 | if (perf_hpp_list.parent && !*parent && |
37592b8a AK |
2053 | symbol__match_regex(al.sym, &parent_regex)) |
2054 | *parent = al.sym; | |
2055 | else if (have_ignore_callees && root_al && | |
2056 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
2057 | /* Treat this symbol as the root, | |
2058 | forgetting its callees. */ | |
2059 | *root_al = al; | |
91d7b2de | 2060 | callchain_cursor_reset(cursor); |
37592b8a AK |
2061 | } |
2062 | } | |
2063 | ||
b49a8fe5 NK |
2064 | if (symbol_conf.hide_unresolved && al.sym == NULL) |
2065 | return 0; | |
c4ee0625 JY |
2066 | |
2067 | if (iter) { | |
2068 | nr_loop_iter = iter->nr_loop_iter; | |
2069 | iter_cycles = iter->cycles; | |
2070 | } | |
2071 | ||
f2eaea09 | 2072 | ms.maps = al.maps; |
5f0fef8a ACM |
2073 | ms.map = al.map; |
2074 | ms.sym = al.sym; | |
2075 | srcline = callchain_srcline(&ms, al.addr); | |
2076 | return callchain_cursor_append(cursor, ip, &ms, | |
c4ee0625 | 2077 | branch, flags, nr_loop_iter, |
40a342cd | 2078 | iter_cycles, branch_from, srcline); |
37592b8a AK |
2079 | } |
2080 | ||
644f2df2 ACM |
2081 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
2082 | struct addr_location *al) | |
3f067dca | 2083 | { |
3f067dca | 2084 | unsigned int i; |
644f2df2 ACM |
2085 | const struct branch_stack *bs = sample->branch_stack; |
2086 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 2087 | |
3f067dca ACM |
2088 | if (!bi) |
2089 | return NULL; | |
2090 | ||
2091 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
2092 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
2093 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
2094 | bi[i].flags = bs->entries[i].flags; |
2095 | } | |
2096 | return bi; | |
2097 | } | |
2098 | ||
c4ee0625 JY |
2099 | static void save_iterations(struct iterations *iter, |
2100 | struct branch_entry *be, int nr) | |
2101 | { | |
2102 | int i; | |
2103 | ||
a3366db0 | 2104 | iter->nr_loop_iter++; |
c4ee0625 JY |
2105 | iter->cycles = 0; |
2106 | ||
2107 | for (i = 0; i < nr; i++) | |
2108 | iter->cycles += be[i].flags.cycles; | |
2109 | } | |
2110 | ||
8b7bad58 AK |
2111 | #define CHASHSZ 127 |
2112 | #define CHASHBITS 7 | |
2113 | #define NO_ENTRY 0xff | |
2114 | ||
2115 | #define PERF_MAX_BRANCH_DEPTH 127 | |
2116 | ||
2117 | /* Remove loops. */ | |
c4ee0625 JY |
2118 | static int remove_loops(struct branch_entry *l, int nr, |
2119 | struct iterations *iter) | |
8b7bad58 AK |
2120 | { |
2121 | int i, j, off; | |
2122 | unsigned char chash[CHASHSZ]; | |
2123 | ||
2124 | memset(chash, NO_ENTRY, sizeof(chash)); | |
2125 | ||
2126 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
2127 | ||
2128 | for (i = 0; i < nr; i++) { | |
2129 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
2130 | ||
2131 | /* no collision handling for now */ | |
2132 | if (chash[h] == NO_ENTRY) { | |
2133 | chash[h] = i; | |
2134 | } else if (l[chash[h]].from == l[i].from) { | |
2135 | bool is_loop = true; | |
2136 | /* check if it is a real loop */ | |
2137 | off = 0; | |
2138 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
2139 | if (l[j].from != l[i + off].from) { | |
2140 | is_loop = false; | |
2141 | break; | |
2142 | } | |
2143 | if (is_loop) { | |
c4ee0625 JY |
2144 | j = nr - (i + off); |
2145 | if (j > 0) { | |
2146 | save_iterations(iter + i + off, | |
2147 | l + i, off); | |
2148 | ||
2149 | memmove(iter + i, iter + i + off, | |
2150 | j * sizeof(*iter)); | |
2151 | ||
2152 | memmove(l + i, l + i + off, | |
2153 | j * sizeof(*l)); | |
2154 | } | |
2155 | ||
8b7bad58 AK |
2156 | nr -= off; |
2157 | } | |
2158 | } | |
2159 | } | |
2160 | return nr; | |
2161 | } | |
2162 | ||
384b6055 KL |
2163 | /* |
2164 | * Recolve LBR callstack chain sample | |
2165 | * Return: | |
2166 | * 1 on success get LBR callchain information | |
2167 | * 0 no available LBR callchain information, should try fp | |
2168 | * negative error code on other errors. | |
2169 | */ | |
2170 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
91d7b2de | 2171 | struct callchain_cursor *cursor, |
384b6055 KL |
2172 | struct perf_sample *sample, |
2173 | struct symbol **parent, | |
2174 | struct addr_location *root_al, | |
2175 | int max_stack) | |
3f067dca | 2176 | { |
384b6055 | 2177 | struct ip_callchain *chain = sample->callchain; |
18ef15c6 | 2178 | int chain_nr = min(max_stack, (int)chain->nr), i; |
73dbcd65 | 2179 | u8 cpumode = PERF_RECORD_MISC_USER; |
b851dd49 | 2180 | u64 ip, branch_from = 0; |
384b6055 KL |
2181 | |
2182 | for (i = 0; i < chain_nr; i++) { | |
2183 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
2184 | break; | |
2185 | } | |
2186 | ||
2187 | /* LBR only affects the user callchain */ | |
2188 | if (i != chain_nr) { | |
2189 | struct branch_stack *lbr_stack = sample->branch_stack; | |
410024db JY |
2190 | int lbr_nr = lbr_stack->nr, j, k; |
2191 | bool branch; | |
2192 | struct branch_flags *flags; | |
384b6055 KL |
2193 | /* |
2194 | * LBR callstack can only get user call chain. | |
2195 | * The mix_chain_nr is kernel call chain | |
2196 | * number plus LBR user call chain number. | |
2197 | * i is kernel call chain number, | |
2198 | * 1 is PERF_CONTEXT_USER, | |
2199 | * lbr_nr + 1 is the user call chain number. | |
2200 | * For details, please refer to the comments | |
2201 | * in callchain__printf | |
2202 | */ | |
2203 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
2204 | ||
384b6055 | 2205 | for (j = 0; j < mix_chain_nr; j++) { |
18ef15c6 | 2206 | int err; |
410024db JY |
2207 | branch = false; |
2208 | flags = NULL; | |
2209 | ||
384b6055 KL |
2210 | if (callchain_param.order == ORDER_CALLEE) { |
2211 | if (j < i + 1) | |
2212 | ip = chain->ips[j]; | |
410024db JY |
2213 | else if (j > i + 1) { |
2214 | k = j - i - 2; | |
2215 | ip = lbr_stack->entries[k].from; | |
2216 | branch = true; | |
2217 | flags = &lbr_stack->entries[k].flags; | |
2218 | } else { | |
384b6055 | 2219 | ip = lbr_stack->entries[0].to; |
410024db JY |
2220 | branch = true; |
2221 | flags = &lbr_stack->entries[0].flags; | |
b851dd49 JY |
2222 | branch_from = |
2223 | lbr_stack->entries[0].from; | |
410024db | 2224 | } |
384b6055 | 2225 | } else { |
410024db JY |
2226 | if (j < lbr_nr) { |
2227 | k = lbr_nr - j - 1; | |
2228 | ip = lbr_stack->entries[k].from; | |
2229 | branch = true; | |
2230 | flags = &lbr_stack->entries[k].flags; | |
2231 | } | |
384b6055 KL |
2232 | else if (j > lbr_nr) |
2233 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
410024db | 2234 | else { |
384b6055 | 2235 | ip = lbr_stack->entries[0].to; |
410024db JY |
2236 | branch = true; |
2237 | flags = &lbr_stack->entries[0].flags; | |
b851dd49 JY |
2238 | branch_from = |
2239 | lbr_stack->entries[0].from; | |
410024db | 2240 | } |
384b6055 KL |
2241 | } |
2242 | ||
410024db JY |
2243 | err = add_callchain_ip(thread, cursor, parent, |
2244 | root_al, &cpumode, ip, | |
c4ee0625 | 2245 | branch, flags, NULL, |
b851dd49 | 2246 | branch_from); |
384b6055 KL |
2247 | if (err) |
2248 | return (err < 0) ? err : 0; | |
2249 | } | |
2250 | return 1; | |
2251 | } | |
2252 | ||
2253 | return 0; | |
2254 | } | |
2255 | ||
e9024d51 DM |
2256 | static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread, |
2257 | struct callchain_cursor *cursor, | |
2258 | struct symbol **parent, | |
2259 | struct addr_location *root_al, | |
2260 | u8 *cpumode, int ent) | |
2261 | { | |
2262 | int err = 0; | |
2263 | ||
2264 | while (--ent >= 0) { | |
2265 | u64 ip = chain->ips[ent]; | |
2266 | ||
2267 | if (ip >= PERF_CONTEXT_MAX) { | |
2268 | err = add_callchain_ip(thread, cursor, parent, | |
2269 | root_al, cpumode, ip, | |
2270 | false, NULL, NULL, 0); | |
2271 | break; | |
2272 | } | |
2273 | } | |
2274 | return err; | |
2275 | } | |
2276 | ||
384b6055 | 2277 | static int thread__resolve_callchain_sample(struct thread *thread, |
91d7b2de | 2278 | struct callchain_cursor *cursor, |
32dcd021 | 2279 | struct evsel *evsel, |
384b6055 KL |
2280 | struct perf_sample *sample, |
2281 | struct symbol **parent, | |
2282 | struct addr_location *root_al, | |
2283 | int max_stack) | |
2284 | { | |
2285 | struct branch_stack *branch = sample->branch_stack; | |
2286 | struct ip_callchain *chain = sample->callchain; | |
b49a821e | 2287 | int chain_nr = 0; |
73dbcd65 | 2288 | u8 cpumode = PERF_RECORD_MISC_USER; |
bf8bddbf | 2289 | int i, j, err, nr_entries; |
8b7bad58 AK |
2290 | int skip_idx = -1; |
2291 | int first_call = 0; | |
2292 | ||
b49a821e JY |
2293 | if (chain) |
2294 | chain_nr = chain->nr; | |
2295 | ||
acf2abbd | 2296 | if (perf_evsel__has_branch_callstack(evsel)) { |
91d7b2de | 2297 | err = resolve_lbr_callchain_sample(thread, cursor, sample, parent, |
384b6055 KL |
2298 | root_al, max_stack); |
2299 | if (err) | |
2300 | return (err < 0) ? err : 0; | |
2301 | } | |
2302 | ||
8b7bad58 AK |
2303 | /* |
2304 | * Based on DWARF debug information, some architectures skip | |
2305 | * a callchain entry saved by the kernel. | |
2306 | */ | |
bf8bddbf | 2307 | skip_idx = arch_skip_callchain_idx(thread, chain); |
3f067dca | 2308 | |
8b7bad58 AK |
2309 | /* |
2310 | * Add branches to call stack for easier browsing. This gives | |
2311 | * more context for a sample than just the callers. | |
2312 | * | |
2313 | * This uses individual histograms of paths compared to the | |
2314 | * aggregated histograms the normal LBR mode uses. | |
2315 | * | |
2316 | * Limitations for now: | |
2317 | * - No extra filters | |
2318 | * - No annotations (should annotate somehow) | |
2319 | */ | |
2320 | ||
2321 | if (branch && callchain_param.branch_callstack) { | |
2322 | int nr = min(max_stack, (int)branch->nr); | |
2323 | struct branch_entry be[nr]; | |
c4ee0625 | 2324 | struct iterations iter[nr]; |
8b7bad58 AK |
2325 | |
2326 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
2327 | pr_warning("corrupted branch chain. skipping...\n"); | |
2328 | goto check_calls; | |
2329 | } | |
2330 | ||
2331 | for (i = 0; i < nr; i++) { | |
2332 | if (callchain_param.order == ORDER_CALLEE) { | |
2333 | be[i] = branch->entries[i]; | |
b49a821e JY |
2334 | |
2335 | if (chain == NULL) | |
2336 | continue; | |
2337 | ||
8b7bad58 AK |
2338 | /* |
2339 | * Check for overlap into the callchain. | |
2340 | * The return address is one off compared to | |
2341 | * the branch entry. To adjust for this | |
2342 | * assume the calling instruction is not longer | |
2343 | * than 8 bytes. | |
2344 | */ | |
2345 | if (i == skip_idx || | |
2346 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
2347 | first_call++; | |
2348 | else if (be[i].from < chain->ips[first_call] && | |
2349 | be[i].from >= chain->ips[first_call] - 8) | |
2350 | first_call++; | |
2351 | } else | |
2352 | be[i] = branch->entries[branch->nr - i - 1]; | |
2353 | } | |
2354 | ||
c4ee0625 JY |
2355 | memset(iter, 0, sizeof(struct iterations) * nr); |
2356 | nr = remove_loops(be, nr, iter); | |
410024db | 2357 | |
8b7bad58 | 2358 | for (i = 0; i < nr; i++) { |
c4ee0625 JY |
2359 | err = add_callchain_ip(thread, cursor, parent, |
2360 | root_al, | |
2361 | NULL, be[i].to, | |
2362 | true, &be[i].flags, | |
2363 | NULL, be[i].from); | |
410024db | 2364 | |
8b7bad58 | 2365 | if (!err) |
91d7b2de | 2366 | err = add_callchain_ip(thread, cursor, parent, root_al, |
410024db JY |
2367 | NULL, be[i].from, |
2368 | true, &be[i].flags, | |
c4ee0625 | 2369 | &iter[i], 0); |
8b7bad58 AK |
2370 | if (err == -EINVAL) |
2371 | break; | |
2372 | if (err) | |
2373 | return err; | |
2374 | } | |
b49a821e JY |
2375 | |
2376 | if (chain_nr == 0) | |
2377 | return 0; | |
2378 | ||
8b7bad58 AK |
2379 | chain_nr -= nr; |
2380 | } | |
2381 | ||
2382 | check_calls: | |
aceb9826 | 2383 | if (chain && callchain_param.order != ORDER_CALLEE) { |
e9024d51 DM |
2384 | err = find_prev_cpumode(chain, thread, cursor, parent, root_al, |
2385 | &cpumode, chain->nr - first_call); | |
2386 | if (err) | |
2387 | return (err < 0) ? err : 0; | |
2388 | } | |
bf8bddbf | 2389 | for (i = first_call, nr_entries = 0; |
a29d5c9b | 2390 | i < chain_nr && nr_entries < max_stack; i++) { |
3f067dca | 2391 | u64 ip; |
3f067dca ACM |
2392 | |
2393 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 2394 | j = i; |
3f067dca | 2395 | else |
a60335ba SB |
2396 | j = chain->nr - i - 1; |
2397 | ||
2398 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
2399 | if (j == skip_idx) | |
2400 | continue; | |
2401 | #endif | |
2402 | ip = chain->ips[j]; | |
bf8bddbf ACM |
2403 | if (ip < PERF_CONTEXT_MAX) |
2404 | ++nr_entries; | |
e9024d51 DM |
2405 | else if (callchain_param.order != ORDER_CALLEE) { |
2406 | err = find_prev_cpumode(chain, thread, cursor, parent, | |
2407 | root_al, &cpumode, j); | |
2408 | if (err) | |
2409 | return (err < 0) ? err : 0; | |
2410 | continue; | |
2411 | } | |
a29d5c9b | 2412 | |
410024db JY |
2413 | err = add_callchain_ip(thread, cursor, parent, |
2414 | root_al, &cpumode, ip, | |
c4ee0625 | 2415 | false, NULL, NULL, 0); |
3f067dca | 2416 | |
3f067dca | 2417 | if (err) |
2e77784b | 2418 | return (err < 0) ? err : 0; |
3f067dca ACM |
2419 | } |
2420 | ||
2421 | return 0; | |
2422 | } | |
2423 | ||
c1529738 | 2424 | static int append_inlines(struct callchain_cursor *cursor, struct map_symbol *ms, u64 ip) |
11ea2515 | 2425 | { |
c1529738 ACM |
2426 | struct symbol *sym = ms->sym; |
2427 | struct map *map = ms->map; | |
11ea2515 MW |
2428 | struct inline_node *inline_node; |
2429 | struct inline_list *ilist; | |
2430 | u64 addr; | |
b38775cf | 2431 | int ret = 1; |
11ea2515 MW |
2432 | |
2433 | if (!symbol_conf.inline_name || !map || !sym) | |
b38775cf | 2434 | return ret; |
11ea2515 | 2435 | |
7a8a8fcf MW |
2436 | addr = map__map_ip(map, ip); |
2437 | addr = map__rip_2objdump(map, addr); | |
11ea2515 MW |
2438 | |
2439 | inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr); | |
2440 | if (!inline_node) { | |
2441 | inline_node = dso__parse_addr_inlines(map->dso, addr, sym); | |
2442 | if (!inline_node) | |
b38775cf | 2443 | return ret; |
11ea2515 MW |
2444 | inlines__tree_insert(&map->dso->inlined_nodes, inline_node); |
2445 | } | |
2446 | ||
2447 | list_for_each_entry(ilist, &inline_node->val, list) { | |
5f0fef8a ACM |
2448 | struct map_symbol ilist_ms = { |
2449 | .map = map, | |
2450 | .sym = ilist->symbol, | |
2451 | }; | |
2452 | ret = callchain_cursor_append(cursor, ip, &ilist_ms, false, | |
b38775cf | 2453 | NULL, 0, 0, 0, ilist->srcline); |
11ea2515 MW |
2454 | |
2455 | if (ret != 0) | |
2456 | return ret; | |
2457 | } | |
2458 | ||
b38775cf | 2459 | return ret; |
11ea2515 MW |
2460 | } |
2461 | ||
3f067dca ACM |
2462 | static int unwind_entry(struct unwind_entry *entry, void *arg) |
2463 | { | |
2464 | struct callchain_cursor *cursor = arg; | |
40a342cd | 2465 | const char *srcline = NULL; |
ff4ce288 | 2466 | u64 addr = entry->ip; |
b49a8fe5 | 2467 | |
c1529738 | 2468 | if (symbol_conf.hide_unresolved && entry->ms.sym == NULL) |
b49a8fe5 | 2469 | return 0; |
40a342cd | 2470 | |
c1529738 | 2471 | if (append_inlines(cursor, &entry->ms, entry->ip) == 0) |
11ea2515 MW |
2472 | return 0; |
2473 | ||
2a9d5050 SD |
2474 | /* |
2475 | * Convert entry->ip from a virtual address to an offset in | |
2476 | * its corresponding binary. | |
2477 | */ | |
c1529738 ACM |
2478 | if (entry->ms.map) |
2479 | addr = map__map_ip(entry->ms.map, entry->ip); | |
2a9d5050 | 2480 | |
5f0fef8a ACM |
2481 | srcline = callchain_srcline(&entry->ms, addr); |
2482 | return callchain_cursor_append(cursor, entry->ip, &entry->ms, | |
40a342cd | 2483 | false, NULL, 0, 0, 0, srcline); |
3f067dca ACM |
2484 | } |
2485 | ||
9919a65e CP |
2486 | static int thread__resolve_callchain_unwind(struct thread *thread, |
2487 | struct callchain_cursor *cursor, | |
32dcd021 | 2488 | struct evsel *evsel, |
9919a65e CP |
2489 | struct perf_sample *sample, |
2490 | int max_stack) | |
3f067dca | 2491 | { |
3f067dca | 2492 | /* Can we do dwarf post unwind? */ |
1fc632ce JO |
2493 | if (!((evsel->core.attr.sample_type & PERF_SAMPLE_REGS_USER) && |
2494 | (evsel->core.attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
3f067dca ACM |
2495 | return 0; |
2496 | ||
2497 | /* Bail out if nothing was captured. */ | |
2498 | if ((!sample->user_regs.regs) || | |
2499 | (!sample->user_stack.size)) | |
2500 | return 0; | |
2501 | ||
91d7b2de | 2502 | return unwind__get_entries(unwind_entry, cursor, |
352ea45a | 2503 | thread, sample, max_stack); |
9919a65e | 2504 | } |
3f067dca | 2505 | |
9919a65e CP |
2506 | int thread__resolve_callchain(struct thread *thread, |
2507 | struct callchain_cursor *cursor, | |
32dcd021 | 2508 | struct evsel *evsel, |
9919a65e CP |
2509 | struct perf_sample *sample, |
2510 | struct symbol **parent, | |
2511 | struct addr_location *root_al, | |
2512 | int max_stack) | |
2513 | { | |
2514 | int ret = 0; | |
2515 | ||
914eb9ca | 2516 | callchain_cursor_reset(cursor); |
9919a65e CP |
2517 | |
2518 | if (callchain_param.order == ORDER_CALLEE) { | |
2519 | ret = thread__resolve_callchain_sample(thread, cursor, | |
2520 | evsel, sample, | |
2521 | parent, root_al, | |
2522 | max_stack); | |
2523 | if (ret) | |
2524 | return ret; | |
2525 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
2526 | evsel, sample, | |
2527 | max_stack); | |
2528 | } else { | |
2529 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
2530 | evsel, sample, | |
2531 | max_stack); | |
2532 | if (ret) | |
2533 | return ret; | |
2534 | ret = thread__resolve_callchain_sample(thread, cursor, | |
2535 | evsel, sample, | |
2536 | parent, root_al, | |
2537 | max_stack); | |
2538 | } | |
2539 | ||
2540 | return ret; | |
3f067dca | 2541 | } |
35feee19 DA |
2542 | |
2543 | int machine__for_each_thread(struct machine *machine, | |
2544 | int (*fn)(struct thread *thread, void *p), | |
2545 | void *priv) | |
2546 | { | |
91e467bc | 2547 | struct threads *threads; |
35feee19 DA |
2548 | struct rb_node *nd; |
2549 | struct thread *thread; | |
2550 | int rc = 0; | |
91e467bc | 2551 | int i; |
35feee19 | 2552 | |
91e467bc KL |
2553 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
2554 | threads = &machine->threads[i]; | |
f3acb3a8 DB |
2555 | for (nd = rb_first_cached(&threads->entries); nd; |
2556 | nd = rb_next(nd)) { | |
91e467bc KL |
2557 | thread = rb_entry(nd, struct thread, rb_node); |
2558 | rc = fn(thread, priv); | |
2559 | if (rc != 0) | |
2560 | return rc; | |
2561 | } | |
35feee19 | 2562 | |
91e467bc KL |
2563 | list_for_each_entry(thread, &threads->dead, node) { |
2564 | rc = fn(thread, priv); | |
2565 | if (rc != 0) | |
2566 | return rc; | |
2567 | } | |
35feee19 DA |
2568 | } |
2569 | return rc; | |
2570 | } | |
58d925dc | 2571 | |
a5499b37 AH |
2572 | int machines__for_each_thread(struct machines *machines, |
2573 | int (*fn)(struct thread *thread, void *p), | |
2574 | void *priv) | |
2575 | { | |
2576 | struct rb_node *nd; | |
2577 | int rc = 0; | |
2578 | ||
2579 | rc = machine__for_each_thread(&machines->host, fn, priv); | |
2580 | if (rc != 0) | |
2581 | return rc; | |
2582 | ||
f3acb3a8 | 2583 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
a5499b37 AH |
2584 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
2585 | ||
2586 | rc = machine__for_each_thread(machine, fn, priv); | |
2587 | if (rc != 0) | |
2588 | return rc; | |
2589 | } | |
2590 | return rc; | |
2591 | } | |
2592 | ||
b9d266ba AH |
2593 | pid_t machine__get_current_tid(struct machine *machine, int cpu) |
2594 | { | |
8c727469 KM |
2595 | int nr_cpus = min(machine->env->nr_cpus_online, MAX_NR_CPUS); |
2596 | ||
2597 | if (cpu < 0 || cpu >= nr_cpus || !machine->current_tid) | |
b9d266ba AH |
2598 | return -1; |
2599 | ||
2600 | return machine->current_tid[cpu]; | |
2601 | } | |
2602 | ||
2603 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
2604 | pid_t tid) | |
2605 | { | |
2606 | struct thread *thread; | |
8c727469 | 2607 | int nr_cpus = min(machine->env->nr_cpus_online, MAX_NR_CPUS); |
b9d266ba AH |
2608 | |
2609 | if (cpu < 0) | |
2610 | return -EINVAL; | |
2611 | ||
2612 | if (!machine->current_tid) { | |
2613 | int i; | |
2614 | ||
8c727469 | 2615 | machine->current_tid = calloc(nr_cpus, sizeof(pid_t)); |
b9d266ba AH |
2616 | if (!machine->current_tid) |
2617 | return -ENOMEM; | |
8c727469 | 2618 | for (i = 0; i < nr_cpus; i++) |
b9d266ba AH |
2619 | machine->current_tid[i] = -1; |
2620 | } | |
2621 | ||
8c727469 | 2622 | if (cpu >= nr_cpus) { |
b9d266ba AH |
2623 | pr_err("Requested CPU %d too large. ", cpu); |
2624 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
2625 | return -EINVAL; | |
2626 | } | |
2627 | ||
2628 | machine->current_tid[cpu] = tid; | |
2629 | ||
2630 | thread = machine__findnew_thread(machine, pid, tid); | |
2631 | if (!thread) | |
2632 | return -ENOMEM; | |
2633 | ||
2634 | thread->cpu = cpu; | |
b91fc39f | 2635 | thread__put(thread); |
b9d266ba AH |
2636 | |
2637 | return 0; | |
2638 | } | |
fbe2af45 | 2639 | |
dbbd34a6 AH |
2640 | /* |
2641 | * Compares the raw arch string. N.B. see instead perf_env__arch() if a | |
2642 | * normalized arch is needed. | |
2643 | */ | |
2644 | bool machine__is(struct machine *machine, const char *arch) | |
2645 | { | |
2646 | return machine && !strcmp(perf_env__raw_arch(machine->env), arch); | |
2647 | } | |
2648 | ||
9cecca32 AH |
2649 | int machine__nr_cpus_avail(struct machine *machine) |
2650 | { | |
2651 | return machine ? perf_env__nr_cpus_avail(machine->env) : 0; | |
2652 | } | |
2653 | ||
fbe2af45 AH |
2654 | int machine__get_kernel_start(struct machine *machine) |
2655 | { | |
a5e813c6 | 2656 | struct map *map = machine__kernel_map(machine); |
fbe2af45 AH |
2657 | int err = 0; |
2658 | ||
2659 | /* | |
2660 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
2661 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
2662 | * all addresses including kernel addresses are less than 2^32. In | |
2663 | * that case (32-bit system), if the kernel mapping is unknown, all | |
2664 | * addresses will be assumed to be in user space - see | |
2665 | * machine__kernel_ip(). | |
2666 | */ | |
2667 | machine->kernel_start = 1ULL << 63; | |
2668 | if (map) { | |
be39db9f | 2669 | err = map__load(map); |
19422a9f AH |
2670 | /* |
2671 | * On x86_64, PTI entry trampolines are less than the | |
2672 | * start of kernel text, but still above 2^63. So leave | |
2673 | * kernel_start = 1ULL << 63 for x86_64. | |
2674 | */ | |
2675 | if (!err && !machine__is(machine, "x86_64")) | |
fbe2af45 AH |
2676 | machine->kernel_start = map->start; |
2677 | } | |
2678 | return err; | |
2679 | } | |
aa7cc2ae | 2680 | |
8e80ad99 AH |
2681 | u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr) |
2682 | { | |
2683 | u8 addr_cpumode = cpumode; | |
2684 | bool kernel_ip; | |
2685 | ||
2686 | if (!machine->single_address_space) | |
2687 | goto out; | |
2688 | ||
2689 | kernel_ip = machine__kernel_ip(machine, addr); | |
2690 | switch (cpumode) { | |
2691 | case PERF_RECORD_MISC_KERNEL: | |
2692 | case PERF_RECORD_MISC_USER: | |
2693 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_KERNEL : | |
2694 | PERF_RECORD_MISC_USER; | |
2695 | break; | |
2696 | case PERF_RECORD_MISC_GUEST_KERNEL: | |
2697 | case PERF_RECORD_MISC_GUEST_USER: | |
2698 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_GUEST_KERNEL : | |
2699 | PERF_RECORD_MISC_GUEST_USER; | |
2700 | break; | |
2701 | default: | |
2702 | break; | |
2703 | } | |
2704 | out: | |
2705 | return addr_cpumode; | |
2706 | } | |
2707 | ||
0e3149f8 ACM |
2708 | struct dso *machine__findnew_dso_id(struct machine *machine, const char *filename, struct dso_id *id) |
2709 | { | |
2710 | return dsos__findnew_id(&machine->dsos, filename, id); | |
2711 | } | |
2712 | ||
aa7cc2ae ACM |
2713 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) |
2714 | { | |
0e3149f8 | 2715 | return machine__findnew_dso_id(machine, filename, NULL); |
aa7cc2ae | 2716 | } |
c3168b0d ACM |
2717 | |
2718 | char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) | |
2719 | { | |
2720 | struct machine *machine = vmachine; | |
2721 | struct map *map; | |
107cad95 | 2722 | struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map); |
c3168b0d ACM |
2723 | |
2724 | if (sym == NULL) | |
2725 | return NULL; | |
2726 | ||
2727 | *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL; | |
2728 | *addrp = map->unmap_ip(map, sym->start); | |
2729 | return sym->name; | |
2730 | } |