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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 |
d1277aa3 | 36 | #include "cgroup.h" |
9d2f8e22 | 37 | |
3052ba56 | 38 | #include <linux/ctype.h> |
3d689ed6 | 39 | #include <symbol/kallsyms.h> |
0f476f2b | 40 | #include <linux/mman.h> |
8520a98d | 41 | #include <linux/string.h> |
7f7c536f | 42 | #include <linux/zalloc.h> |
3d689ed6 | 43 | |
b91fc39f ACM |
44 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock); |
45 | ||
93730f85 ACM |
46 | static struct dso *machine__kernel_dso(struct machine *machine) |
47 | { | |
48 | return machine->vmlinux_map->dso; | |
49 | } | |
50 | ||
e167f995 ACM |
51 | static void dsos__init(struct dsos *dsos) |
52 | { | |
53 | INIT_LIST_HEAD(&dsos->head); | |
54 | dsos->root = RB_ROOT; | |
0a7c74ea | 55 | init_rwsem(&dsos->lock); |
e167f995 ACM |
56 | } |
57 | ||
91e467bc KL |
58 | static void machine__threads_init(struct machine *machine) |
59 | { | |
60 | int i; | |
61 | ||
62 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
63 | struct threads *threads = &machine->threads[i]; | |
f3acb3a8 | 64 | threads->entries = RB_ROOT_CACHED; |
0a7c74ea | 65 | init_rwsem(&threads->lock); |
91e467bc KL |
66 | threads->nr = 0; |
67 | INIT_LIST_HEAD(&threads->dead); | |
68 | threads->last_match = NULL; | |
69 | } | |
70 | } | |
71 | ||
8c7f1bb3 JO |
72 | static int machine__set_mmap_name(struct machine *machine) |
73 | { | |
c192524e JO |
74 | if (machine__is_host(machine)) |
75 | machine->mmap_name = strdup("[kernel.kallsyms]"); | |
76 | else if (machine__is_default_guest(machine)) | |
77 | machine->mmap_name = strdup("[guest.kernel.kallsyms]"); | |
78 | else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]", | |
79 | machine->pid) < 0) | |
80 | machine->mmap_name = NULL; | |
8c7f1bb3 JO |
81 | |
82 | return machine->mmap_name ? 0 : -ENOMEM; | |
83 | } | |
84 | ||
69d2591a ACM |
85 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
86 | { | |
81f981d7 JO |
87 | int err = -ENOMEM; |
88 | ||
93b0ba3c | 89 | memset(machine, 0, sizeof(*machine)); |
79b6bb73 | 90 | maps__init(&machine->kmaps, machine); |
69d2591a | 91 | RB_CLEAR_NODE(&machine->rb_node); |
3d39ac53 | 92 | dsos__init(&machine->dsos); |
69d2591a | 93 | |
91e467bc | 94 | machine__threads_init(machine); |
69d2591a | 95 | |
d027b640 | 96 | machine->vdso_info = NULL; |
4cde998d | 97 | machine->env = NULL; |
d027b640 | 98 | |
69d2591a ACM |
99 | machine->pid = pid; |
100 | ||
14bd6d20 | 101 | machine->id_hdr_size = 0; |
caf8a0d0 | 102 | machine->kptr_restrict_warned = false; |
cfe1c414 | 103 | machine->comm_exec = false; |
fbe2af45 | 104 | machine->kernel_start = 0; |
3183f8ca | 105 | machine->vmlinux_map = NULL; |
cc1121ab | 106 | |
69d2591a ACM |
107 | machine->root_dir = strdup(root_dir); |
108 | if (machine->root_dir == NULL) | |
109 | return -ENOMEM; | |
110 | ||
8c7f1bb3 JO |
111 | if (machine__set_mmap_name(machine)) |
112 | goto out; | |
113 | ||
69d2591a | 114 | if (pid != HOST_KERNEL_ID) { |
1fcb8768 | 115 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 116 | pid); |
69d2591a ACM |
117 | char comm[64]; |
118 | ||
119 | if (thread == NULL) | |
81f981d7 | 120 | goto out; |
69d2591a ACM |
121 | |
122 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 123 | thread__set_comm(thread, comm, 0); |
b91fc39f | 124 | thread__put(thread); |
69d2591a ACM |
125 | } |
126 | ||
b9d266ba | 127 | machine->current_tid = NULL; |
81f981d7 | 128 | err = 0; |
b9d266ba | 129 | |
81f981d7 | 130 | out: |
8c7f1bb3 | 131 | if (err) { |
81f981d7 | 132 | zfree(&machine->root_dir); |
8c7f1bb3 JO |
133 | zfree(&machine->mmap_name); |
134 | } | |
69d2591a ACM |
135 | return 0; |
136 | } | |
137 | ||
8fb598e5 DA |
138 | struct machine *machine__new_host(void) |
139 | { | |
140 | struct machine *machine = malloc(sizeof(*machine)); | |
141 | ||
142 | if (machine != NULL) { | |
143 | machine__init(machine, "", HOST_KERNEL_ID); | |
144 | ||
145 | if (machine__create_kernel_maps(machine) < 0) | |
146 | goto out_delete; | |
147 | } | |
148 | ||
149 | return machine; | |
150 | out_delete: | |
151 | free(machine); | |
152 | return NULL; | |
153 | } | |
154 | ||
7d132caa ACM |
155 | struct machine *machine__new_kallsyms(void) |
156 | { | |
157 | struct machine *machine = machine__new_host(); | |
158 | /* | |
159 | * FIXME: | |
adba1634 | 160 | * 1) We should switch to machine__load_kallsyms(), i.e. not explicitly |
7d132caa ACM |
161 | * ask for not using the kcore parsing code, once this one is fixed |
162 | * to create a map per module. | |
163 | */ | |
329f0ade | 164 | if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) { |
7d132caa ACM |
165 | machine__delete(machine); |
166 | machine = NULL; | |
167 | } | |
168 | ||
169 | return machine; | |
170 | } | |
171 | ||
d3a7c489 | 172 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
173 | { |
174 | struct dso *pos, *n; | |
175 | ||
0a7c74ea | 176 | down_write(&dsos->lock); |
e8807844 | 177 | |
8fa7d87f | 178 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 179 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 180 | pos->root = NULL; |
d3a7c489 ACM |
181 | list_del_init(&pos->node); |
182 | dso__put(pos); | |
69d2591a | 183 | } |
e8807844 | 184 | |
0a7c74ea | 185 | up_write(&dsos->lock); |
d3a7c489 | 186 | } |
e8807844 | 187 | |
d3a7c489 ACM |
188 | static void dsos__exit(struct dsos *dsos) |
189 | { | |
190 | dsos__purge(dsos); | |
0a7c74ea | 191 | exit_rwsem(&dsos->lock); |
69d2591a ACM |
192 | } |
193 | ||
3f067dca ACM |
194 | void machine__delete_threads(struct machine *machine) |
195 | { | |
b91fc39f | 196 | struct rb_node *nd; |
91e467bc | 197 | int i; |
3f067dca | 198 | |
91e467bc KL |
199 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
200 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea | 201 | down_write(&threads->lock); |
f3acb3a8 | 202 | nd = rb_first_cached(&threads->entries); |
91e467bc KL |
203 | while (nd) { |
204 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
3f067dca | 205 | |
91e467bc KL |
206 | nd = rb_next(nd); |
207 | __machine__remove_thread(machine, t, false); | |
208 | } | |
0a7c74ea | 209 | up_write(&threads->lock); |
3f067dca ACM |
210 | } |
211 | } | |
212 | ||
69d2591a ACM |
213 | void machine__exit(struct machine *machine) |
214 | { | |
91e467bc KL |
215 | int i; |
216 | ||
19993b82 ACM |
217 | if (machine == NULL) |
218 | return; | |
219 | ||
ebe9729c | 220 | machine__destroy_kernel_maps(machine); |
79b6bb73 | 221 | maps__exit(&machine->kmaps); |
e8807844 | 222 | dsos__exit(&machine->dsos); |
9a4388c7 | 223 | machine__exit_vdso(machine); |
04662523 | 224 | zfree(&machine->root_dir); |
8c7f1bb3 | 225 | zfree(&machine->mmap_name); |
b9d266ba | 226 | zfree(&machine->current_tid); |
91e467bc KL |
227 | |
228 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
229 | struct threads *threads = &machine->threads[i]; | |
4c00af0e ACM |
230 | struct thread *thread, *n; |
231 | /* | |
232 | * Forget about the dead, at this point whatever threads were | |
233 | * left in the dead lists better have a reference count taken | |
234 | * by who is using them, and then, when they drop those references | |
235 | * and it finally hits zero, thread__put() will check and see that | |
236 | * its not in the dead threads list and will not try to remove it | |
237 | * from there, just calling thread__delete() straight away. | |
238 | */ | |
239 | list_for_each_entry_safe(thread, n, &threads->dead, node) | |
240 | list_del_init(&thread->node); | |
241 | ||
0a7c74ea | 242 | exit_rwsem(&threads->lock); |
91e467bc | 243 | } |
69d2591a ACM |
244 | } |
245 | ||
246 | void machine__delete(struct machine *machine) | |
247 | { | |
32ca678d ACM |
248 | if (machine) { |
249 | machine__exit(machine); | |
250 | free(machine); | |
251 | } | |
69d2591a ACM |
252 | } |
253 | ||
876650e6 ACM |
254 | void machines__init(struct machines *machines) |
255 | { | |
256 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
f3acb3a8 | 257 | machines->guests = RB_ROOT_CACHED; |
876650e6 ACM |
258 | } |
259 | ||
260 | void machines__exit(struct machines *machines) | |
261 | { | |
262 | machine__exit(&machines->host); | |
263 | /* XXX exit guest */ | |
264 | } | |
265 | ||
266 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
267 | const char *root_dir) |
268 | { | |
f3acb3a8 | 269 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
270 | struct rb_node *parent = NULL; |
271 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
f3acb3a8 | 272 | bool leftmost = true; |
69d2591a ACM |
273 | |
274 | if (machine == NULL) | |
275 | return NULL; | |
276 | ||
277 | if (machine__init(machine, root_dir, pid) != 0) { | |
278 | free(machine); | |
279 | return NULL; | |
280 | } | |
281 | ||
282 | while (*p != NULL) { | |
283 | parent = *p; | |
284 | pos = rb_entry(parent, struct machine, rb_node); | |
285 | if (pid < pos->pid) | |
286 | p = &(*p)->rb_left; | |
f3acb3a8 | 287 | else { |
69d2591a | 288 | p = &(*p)->rb_right; |
f3acb3a8 DB |
289 | leftmost = false; |
290 | } | |
69d2591a ACM |
291 | } |
292 | ||
293 | rb_link_node(&machine->rb_node, parent, p); | |
f3acb3a8 | 294 | rb_insert_color_cached(&machine->rb_node, &machines->guests, leftmost); |
69d2591a ACM |
295 | |
296 | return machine; | |
297 | } | |
298 | ||
cfe1c414 AH |
299 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
300 | { | |
301 | struct rb_node *nd; | |
302 | ||
303 | machines->host.comm_exec = comm_exec; | |
304 | ||
f3acb3a8 | 305 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
cfe1c414 AH |
306 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
307 | ||
308 | machine->comm_exec = comm_exec; | |
309 | } | |
310 | } | |
311 | ||
876650e6 | 312 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 313 | { |
f3acb3a8 | 314 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
315 | struct rb_node *parent = NULL; |
316 | struct machine *machine; | |
317 | struct machine *default_machine = NULL; | |
318 | ||
876650e6 ACM |
319 | if (pid == HOST_KERNEL_ID) |
320 | return &machines->host; | |
321 | ||
69d2591a ACM |
322 | while (*p != NULL) { |
323 | parent = *p; | |
324 | machine = rb_entry(parent, struct machine, rb_node); | |
325 | if (pid < machine->pid) | |
326 | p = &(*p)->rb_left; | |
327 | else if (pid > machine->pid) | |
328 | p = &(*p)->rb_right; | |
329 | else | |
330 | return machine; | |
331 | if (!machine->pid) | |
332 | default_machine = machine; | |
333 | } | |
334 | ||
335 | return default_machine; | |
336 | } | |
337 | ||
876650e6 | 338 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
339 | { |
340 | char path[PATH_MAX]; | |
341 | const char *root_dir = ""; | |
342 | struct machine *machine = machines__find(machines, pid); | |
343 | ||
344 | if (machine && (machine->pid == pid)) | |
345 | goto out; | |
346 | ||
347 | if ((pid != HOST_KERNEL_ID) && | |
348 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
349 | (symbol_conf.guestmount)) { | |
350 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
351 | if (access(path, R_OK)) { | |
352 | static struct strlist *seen; | |
353 | ||
354 | if (!seen) | |
4a77e218 | 355 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
356 | |
357 | if (!strlist__has_entry(seen, path)) { | |
358 | pr_err("Can't access file %s\n", path); | |
359 | strlist__add(seen, path); | |
360 | } | |
361 | machine = NULL; | |
362 | goto out; | |
363 | } | |
364 | root_dir = path; | |
365 | } | |
366 | ||
367 | machine = machines__add(machines, pid, root_dir); | |
368 | out: | |
369 | return machine; | |
370 | } | |
371 | ||
fcda5ff7 AH |
372 | struct machine *machines__find_guest(struct machines *machines, pid_t pid) |
373 | { | |
374 | struct machine *machine = machines__find(machines, pid); | |
375 | ||
376 | if (!machine) | |
377 | machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); | |
378 | return machine; | |
379 | } | |
380 | ||
876650e6 ACM |
381 | void machines__process_guests(struct machines *machines, |
382 | machine__process_t process, void *data) | |
69d2591a ACM |
383 | { |
384 | struct rb_node *nd; | |
385 | ||
f3acb3a8 | 386 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
387 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
388 | process(pos, data); | |
389 | } | |
390 | } | |
391 | ||
876650e6 | 392 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
393 | { |
394 | struct rb_node *node; | |
395 | struct machine *machine; | |
396 | ||
876650e6 ACM |
397 | machines->host.id_hdr_size = id_hdr_size; |
398 | ||
f3acb3a8 DB |
399 | for (node = rb_first_cached(&machines->guests); node; |
400 | node = rb_next(node)) { | |
69d2591a ACM |
401 | machine = rb_entry(node, struct machine, rb_node); |
402 | machine->id_hdr_size = id_hdr_size; | |
403 | } | |
404 | ||
405 | return; | |
406 | } | |
407 | ||
29ce3612 AH |
408 | static void machine__update_thread_pid(struct machine *machine, |
409 | struct thread *th, pid_t pid) | |
410 | { | |
411 | struct thread *leader; | |
412 | ||
413 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
414 | return; | |
415 | ||
416 | th->pid_ = pid; | |
417 | ||
418 | if (th->pid_ == th->tid) | |
419 | return; | |
420 | ||
b91fc39f | 421 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
422 | if (!leader) |
423 | goto out_err; | |
424 | ||
fe87797d ACM |
425 | if (!leader->maps) |
426 | leader->maps = maps__new(machine); | |
29ce3612 | 427 | |
fe87797d | 428 | if (!leader->maps) |
29ce3612 AH |
429 | goto out_err; |
430 | ||
fe87797d | 431 | if (th->maps == leader->maps) |
29ce3612 AH |
432 | return; |
433 | ||
fe87797d | 434 | if (th->maps) { |
29ce3612 AH |
435 | /* |
436 | * Maps are created from MMAP events which provide the pid and | |
437 | * tid. Consequently there never should be any maps on a thread | |
438 | * with an unknown pid. Just print an error if there are. | |
439 | */ | |
fe87797d | 440 | if (!maps__empty(th->maps)) |
29ce3612 AH |
441 | pr_err("Discarding thread maps for %d:%d\n", |
442 | th->pid_, th->tid); | |
fe87797d | 443 | maps__put(th->maps); |
29ce3612 AH |
444 | } |
445 | ||
fe87797d | 446 | th->maps = maps__get(leader->maps); |
abd82868 ACM |
447 | out_put: |
448 | thread__put(leader); | |
29ce3612 | 449 | return; |
29ce3612 AH |
450 | out_err: |
451 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
abd82868 | 452 | goto out_put; |
29ce3612 AH |
453 | } |
454 | ||
abd82868 | 455 | /* |
f8b2ebb5 JO |
456 | * Front-end cache - TID lookups come in blocks, |
457 | * so most of the time we dont have to look up | |
458 | * the full rbtree: | |
abd82868 | 459 | */ |
f8b2ebb5 | 460 | static struct thread* |
b57334b9 JO |
461 | __threads__get_last_match(struct threads *threads, struct machine *machine, |
462 | int pid, int tid) | |
9d2f8e22 | 463 | { |
9d2f8e22 ACM |
464 | struct thread *th; |
465 | ||
91e467bc | 466 | th = threads->last_match; |
f3b623b8 ACM |
467 | if (th != NULL) { |
468 | if (th->tid == tid) { | |
469 | machine__update_thread_pid(machine, th, pid); | |
abd82868 | 470 | return thread__get(th); |
f3b623b8 ACM |
471 | } |
472 | ||
91e467bc | 473 | threads->last_match = NULL; |
99d725fc | 474 | } |
9d2f8e22 | 475 | |
f8b2ebb5 JO |
476 | return NULL; |
477 | } | |
478 | ||
b57334b9 JO |
479 | static struct thread* |
480 | threads__get_last_match(struct threads *threads, struct machine *machine, | |
481 | int pid, int tid) | |
482 | { | |
483 | struct thread *th = NULL; | |
484 | ||
485 | if (perf_singlethreaded) | |
486 | th = __threads__get_last_match(threads, machine, pid, tid); | |
487 | ||
488 | return th; | |
489 | } | |
490 | ||
67fda0f3 | 491 | static void |
b57334b9 | 492 | __threads__set_last_match(struct threads *threads, struct thread *th) |
67fda0f3 JO |
493 | { |
494 | threads->last_match = th; | |
495 | } | |
496 | ||
b57334b9 JO |
497 | static void |
498 | threads__set_last_match(struct threads *threads, struct thread *th) | |
499 | { | |
500 | if (perf_singlethreaded) | |
501 | __threads__set_last_match(threads, th); | |
502 | } | |
503 | ||
f8b2ebb5 JO |
504 | /* |
505 | * Caller must eventually drop thread->refcnt returned with a successful | |
506 | * lookup/new thread inserted. | |
507 | */ | |
508 | static struct thread *____machine__findnew_thread(struct machine *machine, | |
509 | struct threads *threads, | |
510 | pid_t pid, pid_t tid, | |
511 | bool create) | |
512 | { | |
f3acb3a8 | 513 | struct rb_node **p = &threads->entries.rb_root.rb_node; |
f8b2ebb5 JO |
514 | struct rb_node *parent = NULL; |
515 | struct thread *th; | |
f3acb3a8 | 516 | bool leftmost = true; |
f8b2ebb5 JO |
517 | |
518 | th = threads__get_last_match(threads, machine, pid, tid); | |
519 | if (th) | |
520 | return th; | |
521 | ||
9d2f8e22 ACM |
522 | while (*p != NULL) { |
523 | parent = *p; | |
524 | th = rb_entry(parent, struct thread, rb_node); | |
525 | ||
38051234 | 526 | if (th->tid == tid) { |
67fda0f3 | 527 | threads__set_last_match(threads, th); |
29ce3612 | 528 | machine__update_thread_pid(machine, th, pid); |
abd82868 | 529 | return thread__get(th); |
9d2f8e22 ACM |
530 | } |
531 | ||
38051234 | 532 | if (tid < th->tid) |
9d2f8e22 | 533 | p = &(*p)->rb_left; |
f3acb3a8 | 534 | else { |
9d2f8e22 | 535 | p = &(*p)->rb_right; |
f3acb3a8 DB |
536 | leftmost = false; |
537 | } | |
9d2f8e22 ACM |
538 | } |
539 | ||
540 | if (!create) | |
541 | return NULL; | |
542 | ||
99d725fc | 543 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
544 | if (th != NULL) { |
545 | rb_link_node(&th->rb_node, parent, p); | |
f3acb3a8 | 546 | rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost); |
cddcef60 JO |
547 | |
548 | /* | |
79b6bb73 | 549 | * We have to initialize maps separately after rb tree is updated. |
cddcef60 JO |
550 | * |
551 | * The reason is that we call machine__findnew_thread | |
79b6bb73 | 552 | * within thread__init_maps to find the thread |
cddcef60 JO |
553 | * leader and that would screwed the rb tree. |
554 | */ | |
79b6bb73 | 555 | if (thread__init_maps(th, machine)) { |
f3acb3a8 | 556 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 557 | RB_CLEAR_NODE(&th->rb_node); |
abd82868 | 558 | thread__put(th); |
cddcef60 | 559 | return NULL; |
418029b7 | 560 | } |
f3b623b8 ACM |
561 | /* |
562 | * It is now in the rbtree, get a ref | |
563 | */ | |
564 | thread__get(th); | |
67fda0f3 | 565 | threads__set_last_match(threads, th); |
91e467bc | 566 | ++threads->nr; |
9d2f8e22 ACM |
567 | } |
568 | ||
569 | return th; | |
570 | } | |
571 | ||
b91fc39f ACM |
572 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
573 | { | |
75e45e43 | 574 | return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true); |
b91fc39f ACM |
575 | } |
576 | ||
314add6b AH |
577 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
578 | pid_t tid) | |
9d2f8e22 | 579 | { |
91e467bc | 580 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f ACM |
581 | struct thread *th; |
582 | ||
0a7c74ea | 583 | down_write(&threads->lock); |
abd82868 | 584 | th = __machine__findnew_thread(machine, pid, tid); |
0a7c74ea | 585 | up_write(&threads->lock); |
b91fc39f | 586 | return th; |
9d2f8e22 ACM |
587 | } |
588 | ||
d75e6097 JO |
589 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
590 | pid_t tid) | |
9d2f8e22 | 591 | { |
91e467bc | 592 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f | 593 | struct thread *th; |
91e467bc | 594 | |
0a7c74ea | 595 | down_read(&threads->lock); |
75e45e43 | 596 | th = ____machine__findnew_thread(machine, threads, pid, tid, false); |
0a7c74ea | 597 | up_read(&threads->lock); |
b91fc39f | 598 | return th; |
9d2f8e22 | 599 | } |
b0a7d1a0 | 600 | |
3035cb6c AH |
601 | /* |
602 | * Threads are identified by pid and tid, and the idle task has pid == tid == 0. | |
603 | * So here a single thread is created for that, but actually there is a separate | |
604 | * idle task per cpu, so there should be one 'struct thread' per cpu, but there | |
605 | * is only 1. That causes problems for some tools, requiring workarounds. For | |
606 | * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). | |
607 | */ | |
608 | struct thread *machine__idle_thread(struct machine *machine) | |
609 | { | |
610 | struct thread *thread = machine__findnew_thread(machine, 0, 0); | |
611 | ||
612 | if (!thread || thread__set_comm(thread, "swapper", 0) || | |
613 | thread__set_namespaces(thread, 0, NULL)) | |
614 | pr_err("problem inserting idle task for machine pid %d\n", machine->pid); | |
615 | ||
616 | return thread; | |
617 | } | |
618 | ||
cfe1c414 AH |
619 | struct comm *machine__thread_exec_comm(struct machine *machine, |
620 | struct thread *thread) | |
621 | { | |
622 | if (machine->comm_exec) | |
623 | return thread__exec_comm(thread); | |
624 | else | |
625 | return thread__comm(thread); | |
626 | } | |
627 | ||
162f0bef FW |
628 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
629 | struct perf_sample *sample) | |
b0a7d1a0 | 630 | { |
314add6b AH |
631 | struct thread *thread = machine__findnew_thread(machine, |
632 | event->comm.pid, | |
633 | event->comm.tid); | |
65de51f9 | 634 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 635 | int err = 0; |
b0a7d1a0 | 636 | |
cfe1c414 AH |
637 | if (exec) |
638 | machine->comm_exec = true; | |
639 | ||
b0a7d1a0 ACM |
640 | if (dump_trace) |
641 | perf_event__fprintf_comm(event, stdout); | |
642 | ||
65de51f9 AH |
643 | if (thread == NULL || |
644 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 645 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 646 | err = -1; |
b0a7d1a0 ACM |
647 | } |
648 | ||
b91fc39f ACM |
649 | thread__put(thread); |
650 | ||
651 | return err; | |
b0a7d1a0 ACM |
652 | } |
653 | ||
f3b3614a HB |
654 | int machine__process_namespaces_event(struct machine *machine __maybe_unused, |
655 | union perf_event *event, | |
656 | struct perf_sample *sample __maybe_unused) | |
657 | { | |
658 | struct thread *thread = machine__findnew_thread(machine, | |
659 | event->namespaces.pid, | |
660 | event->namespaces.tid); | |
661 | int err = 0; | |
662 | ||
663 | WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES, | |
664 | "\nWARNING: kernel seems to support more namespaces than perf" | |
665 | " tool.\nTry updating the perf tool..\n\n"); | |
666 | ||
667 | WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES, | |
668 | "\nWARNING: perf tool seems to support more namespaces than" | |
669 | " the kernel.\nTry updating the kernel..\n\n"); | |
670 | ||
671 | if (dump_trace) | |
672 | perf_event__fprintf_namespaces(event, stdout); | |
673 | ||
674 | if (thread == NULL || | |
675 | thread__set_namespaces(thread, sample->time, &event->namespaces)) { | |
676 | dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n"); | |
677 | err = -1; | |
678 | } | |
679 | ||
680 | thread__put(thread); | |
681 | ||
682 | return err; | |
683 | } | |
684 | ||
d1277aa3 | 685 | int machine__process_cgroup_event(struct machine *machine, |
ba78c1c5 NK |
686 | union perf_event *event, |
687 | struct perf_sample *sample __maybe_unused) | |
688 | { | |
d1277aa3 NK |
689 | struct cgroup *cgrp; |
690 | ||
ba78c1c5 NK |
691 | if (dump_trace) |
692 | perf_event__fprintf_cgroup(event, stdout); | |
693 | ||
d1277aa3 NK |
694 | cgrp = cgroup__findnew(machine->env, event->cgroup.id, event->cgroup.path); |
695 | if (cgrp == NULL) | |
696 | return -ENOMEM; | |
697 | ||
ba78c1c5 NK |
698 | return 0; |
699 | } | |
700 | ||
b0a7d1a0 | 701 | int machine__process_lost_event(struct machine *machine __maybe_unused, |
162f0bef | 702 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 | 703 | { |
5290ed69 | 704 | dump_printf(": id:%" PRI_lu64 ": lost:%" PRI_lu64 "\n", |
b0a7d1a0 ACM |
705 | event->lost.id, event->lost.lost); |
706 | return 0; | |
707 | } | |
708 | ||
c4937a91 KL |
709 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
710 | union perf_event *event, struct perf_sample *sample) | |
711 | { | |
a2e254d8 | 712 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n", |
c4937a91 KL |
713 | sample->id, event->lost_samples.lost); |
714 | return 0; | |
715 | } | |
716 | ||
9f2de315 ACM |
717 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
718 | struct kmod_path *m, | |
719 | const char *filename) | |
da17ea33 JO |
720 | { |
721 | struct dso *dso; | |
da17ea33 | 722 | |
0a7c74ea | 723 | down_write(&machine->dsos.lock); |
e8807844 ACM |
724 | |
725 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 726 | if (!dso) { |
e8807844 | 727 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 728 | if (dso == NULL) |
e8807844 | 729 | goto out_unlock; |
da17ea33 | 730 | |
6b335e8f | 731 | dso__set_module_info(dso, m, machine); |
ca33380a | 732 | dso__set_long_name(dso, strdup(filename), true); |
1c695c88 | 733 | dso->kernel = DSO_SPACE__KERNEL; |
da17ea33 JO |
734 | } |
735 | ||
d3a7c489 | 736 | dso__get(dso); |
e8807844 | 737 | out_unlock: |
0a7c74ea | 738 | up_write(&machine->dsos.lock); |
da17ea33 JO |
739 | return dso; |
740 | } | |
741 | ||
4a96f7a0 AH |
742 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
743 | union perf_event *event) | |
744 | { | |
745 | if (dump_trace) | |
746 | perf_event__fprintf_aux(event, stdout); | |
747 | return 0; | |
748 | } | |
749 | ||
0ad21f68 AH |
750 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
751 | union perf_event *event) | |
752 | { | |
753 | if (dump_trace) | |
754 | perf_event__fprintf_itrace_start(event, stdout); | |
755 | return 0; | |
756 | } | |
757 | ||
0286039f AH |
758 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
759 | union perf_event *event) | |
760 | { | |
761 | if (dump_trace) | |
762 | perf_event__fprintf_switch(event, stdout); | |
763 | return 0; | |
764 | } | |
765 | ||
9aa0bfa3 SL |
766 | static int machine__process_ksymbol_register(struct machine *machine, |
767 | union perf_event *event, | |
768 | struct perf_sample *sample __maybe_unused) | |
769 | { | |
770 | struct symbol *sym; | |
79b6bb73 | 771 | struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr); |
9aa0bfa3 | 772 | |
9aa0bfa3 | 773 | if (!map) { |
4a4eb615 JO |
774 | struct dso *dso = dso__new(event->ksymbol.name); |
775 | ||
776 | if (dso) { | |
1c695c88 | 777 | dso->kernel = DSO_SPACE__KERNEL; |
4a4eb615 | 778 | map = map__new2(0, dso); |
c087e948 | 779 | dso__put(dso); |
4a4eb615 JO |
780 | } |
781 | ||
782 | if (!dso || !map) { | |
9aa0bfa3 | 783 | return -ENOMEM; |
4a4eb615 | 784 | } |
9aa0bfa3 | 785 | |
789e2419 AH |
786 | if (event->ksymbol.ksym_type == PERF_RECORD_KSYMBOL_TYPE_OOL) { |
787 | map->dso->binary_type = DSO_BINARY_TYPE__OOL; | |
788 | map->dso->data.file_size = event->ksymbol.len; | |
789 | dso__set_loaded(map->dso); | |
790 | } | |
791 | ||
ebdba16e ACM |
792 | map->start = event->ksymbol.addr; |
793 | map->end = map->start + event->ksymbol.len; | |
79b6bb73 | 794 | maps__insert(&machine->kmaps, map); |
c087e948 | 795 | map__put(map); |
7eddf7e7 | 796 | dso__set_loaded(dso); |
3c29d448 JO |
797 | |
798 | if (is_bpf_image(event->ksymbol.name)) { | |
799 | dso->binary_type = DSO_BINARY_TYPE__BPF_IMAGE; | |
800 | dso__set_long_name(dso, "", false); | |
801 | } | |
9aa0bfa3 SL |
802 | } |
803 | ||
8529f2e6 | 804 | sym = symbol__new(map->map_ip(map, map->start), |
ebdba16e ACM |
805 | event->ksymbol.len, |
806 | 0, 0, event->ksymbol.name); | |
9aa0bfa3 SL |
807 | if (!sym) |
808 | return -ENOMEM; | |
809 | dso__insert_symbol(map->dso, sym); | |
810 | return 0; | |
811 | } | |
812 | ||
813 | static int machine__process_ksymbol_unregister(struct machine *machine, | |
814 | union perf_event *event, | |
815 | struct perf_sample *sample __maybe_unused) | |
816 | { | |
ab8bf5f2 | 817 | struct symbol *sym; |
9aa0bfa3 SL |
818 | struct map *map; |
819 | ||
79b6bb73 | 820 | map = maps__find(&machine->kmaps, event->ksymbol.addr); |
ab8bf5f2 TR |
821 | if (!map) |
822 | return 0; | |
823 | ||
824 | if (map != machine->vmlinux_map) | |
79b6bb73 | 825 | maps__remove(&machine->kmaps, map); |
ab8bf5f2 TR |
826 | else { |
827 | sym = dso__find_symbol(map->dso, map->map_ip(map, map->start)); | |
828 | if (sym) | |
829 | dso__delete_symbol(map->dso, sym); | |
830 | } | |
9aa0bfa3 SL |
831 | |
832 | return 0; | |
833 | } | |
834 | ||
835 | int machine__process_ksymbol(struct machine *machine __maybe_unused, | |
836 | union perf_event *event, | |
837 | struct perf_sample *sample) | |
838 | { | |
839 | if (dump_trace) | |
840 | perf_event__fprintf_ksymbol(event, stdout); | |
841 | ||
ebdba16e | 842 | if (event->ksymbol.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER) |
9aa0bfa3 SL |
843 | return machine__process_ksymbol_unregister(machine, event, |
844 | sample); | |
845 | return machine__process_ksymbol_register(machine, event, sample); | |
846 | } | |
847 | ||
246eba8e AH |
848 | int machine__process_text_poke(struct machine *machine, union perf_event *event, |
849 | struct perf_sample *sample __maybe_unused) | |
850 | { | |
851 | struct map *map = maps__find(&machine->kmaps, event->text_poke.addr); | |
852 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
853 | ||
854 | if (dump_trace) | |
7eeb9855 | 855 | perf_event__fprintf_text_poke(event, machine, stdout); |
246eba8e AH |
856 | |
857 | if (!event->text_poke.new_len) | |
858 | return 0; | |
859 | ||
860 | if (cpumode != PERF_RECORD_MISC_KERNEL) { | |
861 | pr_debug("%s: unsupported cpumode - ignoring\n", __func__); | |
862 | return 0; | |
863 | } | |
864 | ||
865 | if (map && map->dso) { | |
866 | u8 *new_bytes = event->text_poke.bytes + event->text_poke.old_len; | |
867 | int ret; | |
868 | ||
869 | /* | |
870 | * Kernel maps might be changed when loading symbols so loading | |
871 | * must be done prior to using kernel maps. | |
872 | */ | |
873 | map__load(map); | |
874 | ret = dso__data_write_cache_addr(map->dso, map, machine, | |
875 | event->text_poke.addr, | |
876 | new_bytes, | |
877 | event->text_poke.new_len); | |
878 | if (ret != event->text_poke.new_len) | |
879 | pr_debug("Failed to write kernel text poke at %#" PRI_lx64 "\n", | |
880 | event->text_poke.addr); | |
881 | } else { | |
882 | pr_debug("Failed to find kernel text poke address map for %#" PRI_lx64 "\n", | |
883 | event->text_poke.addr); | |
884 | } | |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
a94ab91a ACM |
889 | static struct map *machine__addnew_module_map(struct machine *machine, u64 start, |
890 | const char *filename) | |
3f067dca | 891 | { |
ca33380a | 892 | struct map *map = NULL; |
ca33380a | 893 | struct kmod_path m; |
a94ab91a | 894 | struct dso *dso; |
3f067dca | 895 | |
ca33380a | 896 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
897 | return NULL; |
898 | ||
9f2de315 | 899 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
900 | if (dso == NULL) |
901 | goto out; | |
902 | ||
3183f8ca | 903 | map = map__new2(start, dso); |
3f067dca | 904 | if (map == NULL) |
ca33380a | 905 | goto out; |
3f067dca | 906 | |
79b6bb73 | 907 | maps__insert(&machine->kmaps, map); |
ca33380a | 908 | |
4d39c89f | 909 | /* Put the map here because maps__insert already got it */ |
9afcb420 | 910 | map__put(map); |
ca33380a | 911 | out: |
566c69c3 MH |
912 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
913 | dso__put(dso); | |
d8f9da24 | 914 | zfree(&m.name); |
3f067dca ACM |
915 | return map; |
916 | } | |
917 | ||
876650e6 | 918 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
919 | { |
920 | struct rb_node *nd; | |
3d39ac53 | 921 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 922 | |
f3acb3a8 | 923 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 924 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 925 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
926 | } |
927 | ||
928 | return ret; | |
929 | } | |
930 | ||
8fa7d87f | 931 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
932 | bool (skip)(struct dso *dso, int parm), int parm) |
933 | { | |
3d39ac53 | 934 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
935 | } |
936 | ||
876650e6 | 937 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
938 | bool (skip)(struct dso *dso, int parm), int parm) |
939 | { | |
940 | struct rb_node *nd; | |
876650e6 | 941 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 942 | |
f3acb3a8 | 943 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
944 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
945 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
946 | } | |
947 | return ret; | |
948 | } | |
949 | ||
950 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
951 | { | |
952 | int i; | |
953 | size_t printed = 0; | |
93730f85 | 954 | struct dso *kdso = machine__kernel_dso(machine); |
3f067dca ACM |
955 | |
956 | if (kdso->has_build_id) { | |
957 | char filename[PATH_MAX]; | |
d2396999 KJ |
958 | if (dso__build_id_filename(kdso, filename, sizeof(filename), |
959 | false)) | |
3f067dca ACM |
960 | printed += fprintf(fp, "[0] %s\n", filename); |
961 | } | |
962 | ||
963 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
964 | printed += fprintf(fp, "[%d] %s\n", | |
965 | i + kdso->has_build_id, vmlinux_path[i]); | |
966 | ||
967 | return printed; | |
968 | } | |
969 | ||
970 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
971 | { | |
3f067dca | 972 | struct rb_node *nd; |
91e467bc KL |
973 | size_t ret; |
974 | int i; | |
3f067dca | 975 | |
91e467bc KL |
976 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
977 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea ACM |
978 | |
979 | down_read(&threads->lock); | |
d2c11034 | 980 | |
91e467bc | 981 | ret = fprintf(fp, "Threads: %u\n", threads->nr); |
3f067dca | 982 | |
f3acb3a8 DB |
983 | for (nd = rb_first_cached(&threads->entries); nd; |
984 | nd = rb_next(nd)) { | |
91e467bc | 985 | struct thread *pos = rb_entry(nd, struct thread, rb_node); |
3f067dca | 986 | |
91e467bc KL |
987 | ret += thread__fprintf(pos, fp); |
988 | } | |
b91fc39f | 989 | |
0a7c74ea | 990 | up_read(&threads->lock); |
91e467bc | 991 | } |
3f067dca ACM |
992 | return ret; |
993 | } | |
994 | ||
995 | static struct dso *machine__get_kernel(struct machine *machine) | |
996 | { | |
8c7f1bb3 | 997 | const char *vmlinux_name = machine->mmap_name; |
3f067dca ACM |
998 | struct dso *kernel; |
999 | ||
1000 | if (machine__is_host(machine)) { | |
c192524e JO |
1001 | if (symbol_conf.vmlinux_name) |
1002 | vmlinux_name = symbol_conf.vmlinux_name; | |
1003 | ||
459ce518 | 1004 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
1c695c88 | 1005 | "[kernel]", DSO_SPACE__KERNEL); |
3f067dca | 1006 | } else { |
c192524e JO |
1007 | if (symbol_conf.default_guest_vmlinux_name) |
1008 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
1009 | ||
459ce518 ACM |
1010 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
1011 | "[guest.kernel]", | |
1c695c88 | 1012 | DSO_SPACE__KERNEL_GUEST); |
3f067dca ACM |
1013 | } |
1014 | ||
1015 | if (kernel != NULL && (!kernel->has_build_id)) | |
1016 | dso__read_running_kernel_build_id(kernel, machine); | |
1017 | ||
1018 | return kernel; | |
1019 | } | |
1020 | ||
1021 | struct process_args { | |
1022 | u64 start; | |
1023 | }; | |
1024 | ||
1c5aae77 AH |
1025 | void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
1026 | size_t bufsz) | |
15a0a870 AH |
1027 | { |
1028 | if (machine__is_default_guest(machine)) | |
1029 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
1030 | else | |
1031 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
1032 | } | |
1033 | ||
a93f0e55 SQ |
1034 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
1035 | ||
1036 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
1037 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
1038 | * symbol_name if it's not that important. | |
1039 | */ | |
b843f62a | 1040 | static int machine__get_running_kernel_start(struct machine *machine, |
ed9adb20 JO |
1041 | const char **symbol_name, |
1042 | u64 *start, u64 *end) | |
3f067dca | 1043 | { |
15a0a870 | 1044 | char filename[PATH_MAX]; |
b843f62a | 1045 | int i, err = -1; |
a93f0e55 SQ |
1046 | const char *name; |
1047 | u64 addr = 0; | |
3f067dca | 1048 | |
15a0a870 | 1049 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
1050 | |
1051 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
1052 | return 0; | |
1053 | ||
a93f0e55 | 1054 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
b843f62a ACM |
1055 | err = kallsyms__get_function_start(filename, name, &addr); |
1056 | if (!err) | |
a93f0e55 SQ |
1057 | break; |
1058 | } | |
1059 | ||
b843f62a ACM |
1060 | if (err) |
1061 | return -1; | |
1062 | ||
a93f0e55 SQ |
1063 | if (symbol_name) |
1064 | *symbol_name = name; | |
3f067dca | 1065 | |
b843f62a | 1066 | *start = addr; |
ed9adb20 JO |
1067 | |
1068 | err = kallsyms__get_function_start(filename, "_etext", &addr); | |
1069 | if (!err) | |
1070 | *end = addr; | |
1071 | ||
b843f62a | 1072 | return 0; |
3f067dca ACM |
1073 | } |
1074 | ||
1c5aae77 AH |
1075 | int machine__create_extra_kernel_map(struct machine *machine, |
1076 | struct dso *kernel, | |
1077 | struct extra_kernel_map *xm) | |
4d99e413 AH |
1078 | { |
1079 | struct kmap *kmap; | |
1080 | struct map *map; | |
1081 | ||
1082 | map = map__new2(xm->start, kernel); | |
1083 | if (!map) | |
1084 | return -1; | |
1085 | ||
1086 | map->end = xm->end; | |
1087 | map->pgoff = xm->pgoff; | |
1088 | ||
1089 | kmap = map__kmap(map); | |
1090 | ||
5759a682 | 1091 | strlcpy(kmap->name, xm->name, KMAP_NAME_LEN); |
4d99e413 | 1092 | |
79b6bb73 | 1093 | maps__insert(&machine->kmaps, map); |
4d99e413 | 1094 | |
5759a682 AH |
1095 | pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n", |
1096 | kmap->name, map->start, map->end); | |
4d99e413 AH |
1097 | |
1098 | map__put(map); | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | static u64 find_entry_trampoline(struct dso *dso) | |
1104 | { | |
1105 | /* Duplicates are removed so lookup all aliases */ | |
1106 | const char *syms[] = { | |
1107 | "_entry_trampoline", | |
1108 | "__entry_trampoline_start", | |
1109 | "entry_SYSCALL_64_trampoline", | |
1110 | }; | |
1111 | struct symbol *sym = dso__first_symbol(dso); | |
1112 | unsigned int i; | |
1113 | ||
1114 | for (; sym; sym = dso__next_symbol(sym)) { | |
1115 | if (sym->binding != STB_GLOBAL) | |
1116 | continue; | |
1117 | for (i = 0; i < ARRAY_SIZE(syms); i++) { | |
1118 | if (!strcmp(sym->name, syms[i])) | |
1119 | return sym->start; | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * These values can be used for kernels that do not have symbols for the entry | |
1128 | * trampolines in kallsyms. | |
1129 | */ | |
1130 | #define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL | |
1131 | #define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000 | |
1132 | #define X86_64_ENTRY_TRAMPOLINE 0x6000 | |
1133 | ||
1134 | /* Map x86_64 PTI entry trampolines */ | |
1135 | int machine__map_x86_64_entry_trampolines(struct machine *machine, | |
1136 | struct dso *kernel) | |
1137 | { | |
79b6bb73 | 1138 | struct maps *kmaps = &machine->kmaps; |
4d99e413 | 1139 | int nr_cpus_avail, cpu; |
1c5aae77 AH |
1140 | bool found = false; |
1141 | struct map *map; | |
1142 | u64 pgoff; | |
1143 | ||
1144 | /* | |
1145 | * In the vmlinux case, pgoff is a virtual address which must now be | |
1146 | * mapped to a vmlinux offset. | |
1147 | */ | |
79b6bb73 | 1148 | maps__for_each_entry(kmaps, map) { |
1c5aae77 AH |
1149 | struct kmap *kmap = __map__kmap(map); |
1150 | struct map *dest_map; | |
1151 | ||
1152 | if (!kmap || !is_entry_trampoline(kmap->name)) | |
1153 | continue; | |
1154 | ||
79b6bb73 | 1155 | dest_map = maps__find(kmaps, map->pgoff); |
1c5aae77 AH |
1156 | if (dest_map != map) |
1157 | map->pgoff = dest_map->map_ip(dest_map, map->pgoff); | |
1158 | found = true; | |
1159 | } | |
1160 | if (found || machine->trampolines_mapped) | |
1161 | return 0; | |
4d99e413 | 1162 | |
1c5aae77 | 1163 | pgoff = find_entry_trampoline(kernel); |
4d99e413 AH |
1164 | if (!pgoff) |
1165 | return 0; | |
1166 | ||
1167 | nr_cpus_avail = machine__nr_cpus_avail(machine); | |
1168 | ||
1169 | /* Add a 1 page map for each CPU's entry trampoline */ | |
1170 | for (cpu = 0; cpu < nr_cpus_avail; cpu++) { | |
1171 | u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU + | |
1172 | cpu * X86_64_CPU_ENTRY_AREA_SIZE + | |
1173 | X86_64_ENTRY_TRAMPOLINE; | |
1174 | struct extra_kernel_map xm = { | |
1175 | .start = va, | |
1176 | .end = va + page_size, | |
1177 | .pgoff = pgoff, | |
1178 | }; | |
1179 | ||
5759a682 AH |
1180 | strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN); |
1181 | ||
4d99e413 AH |
1182 | if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0) |
1183 | return -1; | |
1184 | } | |
1185 | ||
1c5aae77 AH |
1186 | machine->trampolines_mapped = nr_cpus_avail; |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused, | |
1192 | struct dso *kernel __maybe_unused) | |
1193 | { | |
4d99e413 AH |
1194 | return 0; |
1195 | } | |
1196 | ||
1fb87b8e JO |
1197 | static int |
1198 | __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
3f067dca | 1199 | { |
cc1121ab MH |
1200 | /* In case of renewal the kernel map, destroy previous one */ |
1201 | machine__destroy_kernel_maps(machine); | |
1202 | ||
3183f8ca ACM |
1203 | machine->vmlinux_map = map__new2(0, kernel); |
1204 | if (machine->vmlinux_map == NULL) | |
1205 | return -1; | |
3f067dca | 1206 | |
3183f8ca | 1207 | machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip; |
484214f4 | 1208 | maps__insert(&machine->kmaps, machine->vmlinux_map); |
3f067dca ACM |
1209 | return 0; |
1210 | } | |
1211 | ||
1212 | void machine__destroy_kernel_maps(struct machine *machine) | |
1213 | { | |
3183f8ca ACM |
1214 | struct kmap *kmap; |
1215 | struct map *map = machine__kernel_map(machine); | |
3f067dca | 1216 | |
3183f8ca ACM |
1217 | if (map == NULL) |
1218 | return; | |
3f067dca | 1219 | |
3183f8ca | 1220 | kmap = map__kmap(map); |
79b6bb73 | 1221 | maps__remove(&machine->kmaps, map); |
3183f8ca ACM |
1222 | if (kmap && kmap->ref_reloc_sym) { |
1223 | zfree((char **)&kmap->ref_reloc_sym->name); | |
1224 | zfree(&kmap->ref_reloc_sym); | |
3f067dca | 1225 | } |
3183f8ca ACM |
1226 | |
1227 | map__zput(machine->vmlinux_map); | |
3f067dca ACM |
1228 | } |
1229 | ||
876650e6 | 1230 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
1231 | { |
1232 | int ret = 0; | |
1233 | struct dirent **namelist = NULL; | |
1234 | int i, items = 0; | |
1235 | char path[PATH_MAX]; | |
1236 | pid_t pid; | |
1237 | char *endp; | |
1238 | ||
1239 | if (symbol_conf.default_guest_vmlinux_name || | |
1240 | symbol_conf.default_guest_modules || | |
1241 | symbol_conf.default_guest_kallsyms) { | |
1242 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
1243 | } | |
1244 | ||
1245 | if (symbol_conf.guestmount) { | |
1246 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
1247 | if (items <= 0) | |
1248 | return -ENOENT; | |
1249 | for (i = 0; i < items; i++) { | |
1250 | if (!isdigit(namelist[i]->d_name[0])) { | |
1251 | /* Filter out . and .. */ | |
1252 | continue; | |
1253 | } | |
1254 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
1255 | if ((*endp != '\0') || | |
1256 | (endp == namelist[i]->d_name) || | |
1257 | (errno == ERANGE)) { | |
1258 | pr_debug("invalid directory (%s). Skipping.\n", | |
1259 | namelist[i]->d_name); | |
1260 | continue; | |
1261 | } | |
1262 | sprintf(path, "%s/%s/proc/kallsyms", | |
1263 | symbol_conf.guestmount, | |
1264 | namelist[i]->d_name); | |
1265 | ret = access(path, R_OK); | |
1266 | if (ret) { | |
1267 | pr_debug("Can't access file %s\n", path); | |
1268 | goto failure; | |
1269 | } | |
1270 | machines__create_kernel_maps(machines, pid); | |
1271 | } | |
1272 | failure: | |
1273 | free(namelist); | |
1274 | } | |
1275 | ||
1276 | return ret; | |
1277 | } | |
1278 | ||
876650e6 | 1279 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 1280 | { |
f3acb3a8 | 1281 | struct rb_node *next = rb_first_cached(&machines->guests); |
876650e6 ACM |
1282 | |
1283 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
1284 | |
1285 | while (next) { | |
1286 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
1287 | ||
1288 | next = rb_next(&pos->rb_node); | |
f3acb3a8 | 1289 | rb_erase_cached(&pos->rb_node, &machines->guests); |
3f067dca ACM |
1290 | machine__delete(pos); |
1291 | } | |
1292 | } | |
1293 | ||
876650e6 | 1294 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
1295 | { |
1296 | struct machine *machine = machines__findnew(machines, pid); | |
1297 | ||
1298 | if (machine == NULL) | |
1299 | return -1; | |
1300 | ||
1301 | return machine__create_kernel_maps(machine); | |
1302 | } | |
1303 | ||
3183f8ca | 1304 | int machine__load_kallsyms(struct machine *machine, const char *filename) |
3f067dca | 1305 | { |
a5e813c6 | 1306 | struct map *map = machine__kernel_map(machine); |
e8f3879f | 1307 | int ret = __dso__load_kallsyms(map->dso, filename, map, true); |
3f067dca ACM |
1308 | |
1309 | if (ret > 0) { | |
3183f8ca | 1310 | dso__set_loaded(map->dso); |
3f067dca ACM |
1311 | /* |
1312 | * Since /proc/kallsyms will have multiple sessions for the | |
1313 | * kernel, with modules between them, fixup the end of all | |
1314 | * sections. | |
1315 | */ | |
79b6bb73 | 1316 | maps__fixup_end(&machine->kmaps); |
3f067dca ACM |
1317 | } |
1318 | ||
1319 | return ret; | |
1320 | } | |
1321 | ||
1d1a2654 | 1322 | int machine__load_vmlinux_path(struct machine *machine) |
3f067dca | 1323 | { |
a5e813c6 | 1324 | struct map *map = machine__kernel_map(machine); |
be39db9f | 1325 | int ret = dso__load_vmlinux_path(map->dso, map); |
3f067dca | 1326 | |
39b12f78 | 1327 | if (ret > 0) |
3183f8ca | 1328 | dso__set_loaded(map->dso); |
3f067dca ACM |
1329 | |
1330 | return ret; | |
1331 | } | |
1332 | ||
3f067dca ACM |
1333 | static char *get_kernel_version(const char *root_dir) |
1334 | { | |
1335 | char version[PATH_MAX]; | |
1336 | FILE *file; | |
1337 | char *name, *tmp; | |
1338 | const char *prefix = "Linux version "; | |
1339 | ||
1340 | sprintf(version, "%s/proc/version", root_dir); | |
1341 | file = fopen(version, "r"); | |
1342 | if (!file) | |
1343 | return NULL; | |
1344 | ||
3f067dca ACM |
1345 | tmp = fgets(version, sizeof(version), file); |
1346 | fclose(file); | |
34b65aff DY |
1347 | if (!tmp) |
1348 | return NULL; | |
3f067dca ACM |
1349 | |
1350 | name = strstr(version, prefix); | |
1351 | if (!name) | |
1352 | return NULL; | |
1353 | name += strlen(prefix); | |
1354 | tmp = strchr(name, ' '); | |
1355 | if (tmp) | |
1356 | *tmp = '\0'; | |
1357 | ||
1358 | return strdup(name); | |
1359 | } | |
1360 | ||
bb58a8a4 JO |
1361 | static bool is_kmod_dso(struct dso *dso) |
1362 | { | |
1363 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1364 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1365 | } | |
1366 | ||
9a29ceee | 1367 | static int maps__set_module_path(struct maps *maps, const char *path, struct kmod_path *m) |
bb58a8a4 | 1368 | { |
bb58a8a4 | 1369 | char *long_name; |
9a29ceee | 1370 | struct map *map = maps__find_by_name(maps, m->name); |
bb58a8a4 | 1371 | |
bb58a8a4 JO |
1372 | if (map == NULL) |
1373 | return 0; | |
1374 | ||
1375 | long_name = strdup(path); | |
1376 | if (long_name == NULL) | |
1377 | return -ENOMEM; | |
1378 | ||
1379 | dso__set_long_name(map->dso, long_name, true); | |
1380 | dso__kernel_module_get_build_id(map->dso, ""); | |
1381 | ||
1382 | /* | |
1383 | * Full name could reveal us kmod compression, so | |
1384 | * we need to update the symtab_type if needed. | |
1385 | */ | |
2af52475 | 1386 | if (m->comp && is_kmod_dso(map->dso)) { |
bb58a8a4 | 1387 | map->dso->symtab_type++; |
2af52475 JO |
1388 | map->dso->comp = m->comp; |
1389 | } | |
bb58a8a4 JO |
1390 | |
1391 | return 0; | |
1392 | } | |
1393 | ||
9a29ceee | 1394 | static int maps__set_modules_path_dir(struct maps *maps, const char *dir_name, int depth) |
3f067dca ACM |
1395 | { |
1396 | struct dirent *dent; | |
1397 | DIR *dir = opendir(dir_name); | |
1398 | int ret = 0; | |
1399 | ||
1400 | if (!dir) { | |
1401 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1402 | return -1; | |
1403 | } | |
1404 | ||
1405 | while ((dent = readdir(dir)) != NULL) { | |
1406 | char path[PATH_MAX]; | |
1407 | struct stat st; | |
1408 | ||
1409 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1410 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1411 | if (stat(path, &st)) | |
1412 | continue; | |
1413 | ||
1414 | if (S_ISDIR(st.st_mode)) { | |
1415 | if (!strcmp(dent->d_name, ".") || | |
1416 | !strcmp(dent->d_name, "..")) | |
1417 | continue; | |
1418 | ||
61d4290c RY |
1419 | /* Do not follow top-level source and build symlinks */ |
1420 | if (depth == 0) { | |
1421 | if (!strcmp(dent->d_name, "source") || | |
1422 | !strcmp(dent->d_name, "build")) | |
1423 | continue; | |
1424 | } | |
1425 | ||
9a29ceee | 1426 | ret = maps__set_modules_path_dir(maps, path, depth + 1); |
3f067dca ACM |
1427 | if (ret < 0) |
1428 | goto out; | |
1429 | } else { | |
bb58a8a4 | 1430 | struct kmod_path m; |
3f067dca | 1431 | |
bb58a8a4 JO |
1432 | ret = kmod_path__parse_name(&m, dent->d_name); |
1433 | if (ret) | |
1434 | goto out; | |
c00c48fc | 1435 | |
bb58a8a4 | 1436 | if (m.kmod) |
9a29ceee | 1437 | ret = maps__set_module_path(maps, path, &m); |
c00c48fc | 1438 | |
d8f9da24 | 1439 | zfree(&m.name); |
3f067dca | 1440 | |
bb58a8a4 | 1441 | if (ret) |
3f067dca | 1442 | goto out; |
3f067dca ACM |
1443 | } |
1444 | } | |
1445 | ||
1446 | out: | |
1447 | closedir(dir); | |
1448 | return ret; | |
1449 | } | |
1450 | ||
1451 | static int machine__set_modules_path(struct machine *machine) | |
1452 | { | |
1453 | char *version; | |
1454 | char modules_path[PATH_MAX]; | |
1455 | ||
1456 | version = get_kernel_version(machine->root_dir); | |
1457 | if (!version) | |
1458 | return -1; | |
1459 | ||
61d4290c | 1460 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1461 | machine->root_dir, version); |
1462 | free(version); | |
1463 | ||
79b6bb73 | 1464 | return maps__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca | 1465 | } |
203d8a4a | 1466 | int __weak arch__fix_module_text_start(u64 *start __maybe_unused, |
12a6d294 | 1467 | u64 *size __maybe_unused, |
203d8a4a SSG |
1468 | const char *name __maybe_unused) |
1469 | { | |
1470 | return 0; | |
1471 | } | |
3f067dca | 1472 | |
9ad4652b TR |
1473 | static int machine__create_module(void *arg, const char *name, u64 start, |
1474 | u64 size) | |
3f067dca | 1475 | { |
316d70d6 | 1476 | struct machine *machine = arg; |
3f067dca | 1477 | struct map *map; |
316d70d6 | 1478 | |
12a6d294 | 1479 | if (arch__fix_module_text_start(&start, &size, name) < 0) |
203d8a4a SSG |
1480 | return -1; |
1481 | ||
a94ab91a | 1482 | map = machine__addnew_module_map(machine, start, name); |
316d70d6 AH |
1483 | if (map == NULL) |
1484 | return -1; | |
9ad4652b | 1485 | map->end = start + size; |
316d70d6 AH |
1486 | |
1487 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1488 | ||
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static int machine__create_modules(struct machine *machine) | |
1493 | { | |
3f067dca ACM |
1494 | const char *modules; |
1495 | char path[PATH_MAX]; | |
1496 | ||
f4be904d | 1497 | if (machine__is_default_guest(machine)) { |
3f067dca | 1498 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1499 | } else { |
1500 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1501 | modules = path; |
1502 | } | |
1503 | ||
aa7fe3b0 | 1504 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1505 | return -1; |
1506 | ||
316d70d6 | 1507 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1508 | return -1; |
1509 | ||
316d70d6 AH |
1510 | if (!machine__set_modules_path(machine)) |
1511 | return 0; | |
3f067dca | 1512 | |
316d70d6 | 1513 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1514 | |
8f76fcd9 | 1515 | return 0; |
3f067dca ACM |
1516 | } |
1517 | ||
1fb87b8e JO |
1518 | static void machine__set_kernel_mmap(struct machine *machine, |
1519 | u64 start, u64 end) | |
1520 | { | |
3183f8ca ACM |
1521 | machine->vmlinux_map->start = start; |
1522 | machine->vmlinux_map->end = end; | |
1523 | /* | |
1524 | * Be a bit paranoid here, some perf.data file came with | |
1525 | * a zero sized synthesized MMAP event for the kernel. | |
1526 | */ | |
1527 | if (start == 0 && end == 0) | |
1528 | machine->vmlinux_map->end = ~0ULL; | |
1fb87b8e JO |
1529 | } |
1530 | ||
977c7a6d WL |
1531 | static void machine__update_kernel_mmap(struct machine *machine, |
1532 | u64 start, u64 end) | |
1533 | { | |
1534 | struct map *map = machine__kernel_map(machine); | |
1535 | ||
1536 | map__get(map); | |
79b6bb73 | 1537 | maps__remove(&machine->kmaps, map); |
977c7a6d WL |
1538 | |
1539 | machine__set_kernel_mmap(machine, start, end); | |
1540 | ||
79b6bb73 | 1541 | maps__insert(&machine->kmaps, map); |
977c7a6d WL |
1542 | map__put(map); |
1543 | } | |
1544 | ||
3f067dca ACM |
1545 | int machine__create_kernel_maps(struct machine *machine) |
1546 | { | |
1547 | struct dso *kernel = machine__get_kernel(machine); | |
b843f62a | 1548 | const char *name = NULL; |
ee05d217 | 1549 | struct map *map; |
ed9adb20 | 1550 | u64 start = 0, end = ~0ULL; |
1154c957 MH |
1551 | int ret; |
1552 | ||
45e90056 | 1553 | if (kernel == NULL) |
5512cf24 | 1554 | return -1; |
3f067dca | 1555 | |
1154c957 | 1556 | ret = __machine__create_kernel_maps(machine, kernel); |
1154c957 | 1557 | if (ret < 0) |
1c5aae77 | 1558 | goto out_put; |
3f067dca ACM |
1559 | |
1560 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1561 | if (machine__is_host(machine)) | |
1562 | pr_debug("Problems creating module maps, " | |
1563 | "continuing anyway...\n"); | |
1564 | else | |
1565 | pr_debug("Problems creating module maps for guest %d, " | |
1566 | "continuing anyway...\n", machine->pid); | |
1567 | } | |
1568 | ||
ed9adb20 | 1569 | if (!machine__get_running_kernel_start(machine, &name, &start, &end)) { |
3f938ee2 | 1570 | if (name && |
ed9adb20 | 1571 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, start)) { |
3f938ee2 | 1572 | machine__destroy_kernel_maps(machine); |
1c5aae77 AH |
1573 | ret = -1; |
1574 | goto out_put; | |
3f938ee2 | 1575 | } |
ee05d217 | 1576 | |
977c7a6d WL |
1577 | /* |
1578 | * we have a real start address now, so re-order the kmaps | |
1579 | * assume it's the last in the kmaps | |
1580 | */ | |
ed9adb20 | 1581 | machine__update_kernel_mmap(machine, start, end); |
5512cf24 AH |
1582 | } |
1583 | ||
1c5aae77 AH |
1584 | if (machine__create_extra_kernel_maps(machine, kernel)) |
1585 | pr_debug("Problems creating extra kernel maps, continuing anyway...\n"); | |
1586 | ||
ed9adb20 JO |
1587 | if (end == ~0ULL) { |
1588 | /* update end address of the kernel map using adjacent module address */ | |
1589 | map = map__next(machine__kernel_map(machine)); | |
1590 | if (map) | |
1591 | machine__set_kernel_mmap(machine, start, map->start); | |
1592 | } | |
1593 | ||
1c5aae77 AH |
1594 | out_put: |
1595 | dso__put(kernel); | |
1596 | return ret; | |
3f067dca ACM |
1597 | } |
1598 | ||
8e0cf965 AH |
1599 | static bool machine__uses_kcore(struct machine *machine) |
1600 | { | |
1601 | struct dso *dso; | |
1602 | ||
3d39ac53 | 1603 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1604 | if (dso__is_kcore(dso)) |
1605 | return true; | |
1606 | } | |
1607 | ||
1608 | return false; | |
1609 | } | |
1610 | ||
a8ce99b0 | 1611 | static bool perf_event__is_extra_kernel_mmap(struct machine *machine, |
031f112f | 1612 | struct extra_kernel_map *xm) |
a8ce99b0 AH |
1613 | { |
1614 | return machine__is(machine, "x86_64") && | |
031f112f | 1615 | is_entry_trampoline(xm->name); |
a8ce99b0 AH |
1616 | } |
1617 | ||
1618 | static int machine__process_extra_kernel_map(struct machine *machine, | |
031f112f | 1619 | struct extra_kernel_map *xm) |
a8ce99b0 | 1620 | { |
93730f85 | 1621 | struct dso *kernel = machine__kernel_dso(machine); |
a8ce99b0 AH |
1622 | |
1623 | if (kernel == NULL) | |
1624 | return -1; | |
1625 | ||
031f112f | 1626 | return machine__create_extra_kernel_map(machine, kernel, xm); |
a8ce99b0 AH |
1627 | } |
1628 | ||
b0a7d1a0 | 1629 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1ca6e802 JO |
1630 | struct extra_kernel_map *xm, |
1631 | struct build_id *bid) | |
b0a7d1a0 ACM |
1632 | { |
1633 | struct map *map; | |
1c695c88 | 1634 | enum dso_space_type dso_space; |
b0a7d1a0 ACM |
1635 | bool is_kernel_mmap; |
1636 | ||
8e0cf965 AH |
1637 | /* If we have maps from kcore then we do not need or want any others */ |
1638 | if (machine__uses_kcore(machine)) | |
1639 | return 0; | |
1640 | ||
b0a7d1a0 | 1641 | if (machine__is_host(machine)) |
1c695c88 | 1642 | dso_space = DSO_SPACE__KERNEL; |
b0a7d1a0 | 1643 | else |
1c695c88 | 1644 | dso_space = DSO_SPACE__KERNEL_GUEST; |
b0a7d1a0 | 1645 | |
031f112f | 1646 | is_kernel_mmap = memcmp(xm->name, machine->mmap_name, |
8c7f1bb3 | 1647 | strlen(machine->mmap_name) - 1) == 0; |
031f112f JO |
1648 | if (xm->name[0] == '/' || |
1649 | (!is_kernel_mmap && xm->name[0] == '[')) { | |
1650 | map = machine__addnew_module_map(machine, xm->start, | |
1651 | xm->name); | |
b0a7d1a0 ACM |
1652 | if (map == NULL) |
1653 | goto out_problem; | |
1654 | ||
031f112f | 1655 | map->end = map->start + xm->end - xm->start; |
1ca6e802 JO |
1656 | |
1657 | if (build_id__is_defined(bid)) | |
1658 | dso__set_build_id(map->dso, bid); | |
1659 | ||
b0a7d1a0 | 1660 | } else if (is_kernel_mmap) { |
031f112f | 1661 | const char *symbol_name = (xm->name + strlen(machine->mmap_name)); |
b0a7d1a0 ACM |
1662 | /* |
1663 | * Should be there already, from the build-id table in | |
1664 | * the header. | |
1665 | */ | |
b837a8bd NK |
1666 | struct dso *kernel = NULL; |
1667 | struct dso *dso; | |
1668 | ||
0a7c74ea | 1669 | down_read(&machine->dsos.lock); |
e8807844 | 1670 | |
3d39ac53 | 1671 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1672 | |
1673 | /* | |
1674 | * The cpumode passed to is_kernel_module is not the | |
1675 | * cpumode of *this* event. If we insist on passing | |
1676 | * correct cpumode to is_kernel_module, we should | |
1677 | * record the cpumode when we adding this dso to the | |
1678 | * linked list. | |
1679 | * | |
1680 | * However we don't really need passing correct | |
1681 | * cpumode. We know the correct cpumode must be kernel | |
1682 | * mode (if not, we should not link it onto kernel_dsos | |
1683 | * list). | |
1684 | * | |
1685 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1686 | * is_kernel_module() treats it as a kernel cpumode. | |
1687 | */ | |
1688 | ||
1689 | if (!dso->kernel || | |
1690 | is_kernel_module(dso->long_name, | |
1691 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1692 | continue; |
1693 | ||
1f121b03 | 1694 | |
b837a8bd NK |
1695 | kernel = dso; |
1696 | break; | |
1697 | } | |
1698 | ||
0a7c74ea | 1699 | up_read(&machine->dsos.lock); |
e8807844 | 1700 | |
b837a8bd | 1701 | if (kernel == NULL) |
8c7f1bb3 | 1702 | kernel = machine__findnew_dso(machine, machine->mmap_name); |
b0a7d1a0 ACM |
1703 | if (kernel == NULL) |
1704 | goto out_problem; | |
1705 | ||
1c695c88 | 1706 | kernel->kernel = dso_space; |
d3a7c489 ACM |
1707 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1708 | dso__put(kernel); | |
b0a7d1a0 | 1709 | goto out_problem; |
d3a7c489 | 1710 | } |
b0a7d1a0 | 1711 | |
330dfa22 NK |
1712 | if (strstr(kernel->long_name, "vmlinux")) |
1713 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1714 | |
031f112f | 1715 | machine__update_kernel_mmap(machine, xm->start, xm->end); |
b0a7d1a0 | 1716 | |
1ca6e802 JO |
1717 | if (build_id__is_defined(bid)) |
1718 | dso__set_build_id(kernel, bid); | |
1719 | ||
b0a7d1a0 ACM |
1720 | /* |
1721 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1722 | * symbol. Effectively having zero here means that at record | |
1723 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1724 | */ | |
031f112f | 1725 | if (xm->pgoff != 0) { |
3183f8ca ACM |
1726 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, |
1727 | symbol_name, | |
031f112f | 1728 | xm->pgoff); |
b0a7d1a0 ACM |
1729 | } |
1730 | ||
1731 | if (machine__is_default_guest(machine)) { | |
1732 | /* | |
1733 | * preload dso of guest kernel and modules | |
1734 | */ | |
be39db9f | 1735 | dso__load(kernel, machine__kernel_map(machine)); |
b0a7d1a0 | 1736 | } |
031f112f JO |
1737 | } else if (perf_event__is_extra_kernel_mmap(machine, xm)) { |
1738 | return machine__process_extra_kernel_map(machine, xm); | |
b0a7d1a0 ACM |
1739 | } |
1740 | return 0; | |
1741 | out_problem: | |
1742 | return -1; | |
1743 | } | |
1744 | ||
5c5e854b | 1745 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef | 1746 | union perf_event *event, |
473398a2 | 1747 | struct perf_sample *sample) |
5c5e854b | 1748 | { |
5c5e854b SE |
1749 | struct thread *thread; |
1750 | struct map *map; | |
4a7380a5 ACM |
1751 | struct dso_id dso_id = { |
1752 | .maj = event->mmap2.maj, | |
1753 | .min = event->mmap2.min, | |
1754 | .ino = event->mmap2.ino, | |
1755 | .ino_generation = event->mmap2.ino_generation, | |
1756 | }; | |
1ca6e802 | 1757 | struct build_id __bid, *bid = NULL; |
5c5e854b SE |
1758 | int ret = 0; |
1759 | ||
1760 | if (dump_trace) | |
1761 | perf_event__fprintf_mmap2(event, stdout); | |
1762 | ||
1ca6e802 JO |
1763 | if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) { |
1764 | bid = &__bid; | |
1765 | build_id__init(bid, event->mmap2.build_id, event->mmap2.build_id_size); | |
1766 | } | |
1767 | ||
473398a2 ACM |
1768 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1769 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
031f112f JO |
1770 | struct extra_kernel_map xm = { |
1771 | .start = event->mmap2.start, | |
1772 | .end = event->mmap2.start + event->mmap2.len, | |
1773 | .pgoff = event->mmap2.pgoff, | |
1774 | }; | |
1775 | ||
1776 | strlcpy(xm.name, event->mmap2.filename, KMAP_NAME_LEN); | |
1ca6e802 | 1777 | ret = machine__process_kernel_mmap_event(machine, &xm, bid); |
5c5e854b SE |
1778 | if (ret < 0) |
1779 | goto out_problem; | |
1780 | return 0; | |
1781 | } | |
1782 | ||
1783 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1784 | event->mmap2.tid); |
5c5e854b SE |
1785 | if (thread == NULL) |
1786 | goto out_problem; | |
1787 | ||
2a03068c | 1788 | map = map__new(machine, event->mmap2.start, |
5c5e854b | 1789 | event->mmap2.len, event->mmap2.pgoff, |
4a7380a5 | 1790 | &dso_id, event->mmap2.prot, |
1ca6e802 | 1791 | event->mmap2.flags, bid, |
3183f8ca | 1792 | event->mmap2.filename, thread); |
5c5e854b SE |
1793 | |
1794 | if (map == NULL) | |
b91fc39f | 1795 | goto out_problem_map; |
5c5e854b | 1796 | |
8132a2a8 HK |
1797 | ret = thread__insert_map(thread, map); |
1798 | if (ret) | |
1799 | goto out_problem_insert; | |
1800 | ||
b91fc39f | 1801 | thread__put(thread); |
84c2cafa | 1802 | map__put(map); |
5c5e854b SE |
1803 | return 0; |
1804 | ||
8132a2a8 HK |
1805 | out_problem_insert: |
1806 | map__put(map); | |
b91fc39f ACM |
1807 | out_problem_map: |
1808 | thread__put(thread); | |
5c5e854b SE |
1809 | out_problem: |
1810 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1811 | return 0; | |
1812 | } | |
1813 | ||
162f0bef | 1814 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
473398a2 | 1815 | struct perf_sample *sample) |
b0a7d1a0 | 1816 | { |
b0a7d1a0 ACM |
1817 | struct thread *thread; |
1818 | struct map *map; | |
0f476f2b | 1819 | u32 prot = 0; |
b0a7d1a0 ACM |
1820 | int ret = 0; |
1821 | ||
1822 | if (dump_trace) | |
1823 | perf_event__fprintf_mmap(event, stdout); | |
1824 | ||
473398a2 ACM |
1825 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1826 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
031f112f JO |
1827 | struct extra_kernel_map xm = { |
1828 | .start = event->mmap.start, | |
1829 | .end = event->mmap.start + event->mmap.len, | |
1830 | .pgoff = event->mmap.pgoff, | |
1831 | }; | |
1832 | ||
1833 | strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN); | |
1ca6e802 | 1834 | ret = machine__process_kernel_mmap_event(machine, &xm, NULL); |
b0a7d1a0 ACM |
1835 | if (ret < 0) |
1836 | goto out_problem; | |
1837 | return 0; | |
1838 | } | |
1839 | ||
314add6b | 1840 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1841 | event->mmap.tid); |
b0a7d1a0 ACM |
1842 | if (thread == NULL) |
1843 | goto out_problem; | |
bad40917 | 1844 | |
3183f8ca | 1845 | if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA)) |
0f476f2b | 1846 | prot = PROT_EXEC; |
bad40917 | 1847 | |
2a03068c | 1848 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1849 | event->mmap.len, event->mmap.pgoff, |
1ca6e802 | 1850 | NULL, prot, 0, NULL, event->mmap.filename, thread); |
bad40917 | 1851 | |
b0a7d1a0 | 1852 | if (map == NULL) |
b91fc39f | 1853 | goto out_problem_map; |
b0a7d1a0 | 1854 | |
8132a2a8 HK |
1855 | ret = thread__insert_map(thread, map); |
1856 | if (ret) | |
1857 | goto out_problem_insert; | |
1858 | ||
b91fc39f | 1859 | thread__put(thread); |
84c2cafa | 1860 | map__put(map); |
b0a7d1a0 ACM |
1861 | return 0; |
1862 | ||
8132a2a8 HK |
1863 | out_problem_insert: |
1864 | map__put(map); | |
b91fc39f ACM |
1865 | out_problem_map: |
1866 | thread__put(thread); | |
b0a7d1a0 ACM |
1867 | out_problem: |
1868 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1869 | return 0; | |
1870 | } | |
1871 | ||
b91fc39f | 1872 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1873 | { |
91e467bc KL |
1874 | struct threads *threads = machine__threads(machine, th->tid); |
1875 | ||
1876 | if (threads->last_match == th) | |
67fda0f3 | 1877 | threads__set_last_match(threads, NULL); |
f3b623b8 | 1878 | |
b91fc39f | 1879 | if (lock) |
0a7c74ea | 1880 | down_write(&threads->lock); |
4c00af0e ACM |
1881 | |
1882 | BUG_ON(refcount_read(&th->refcnt) == 0); | |
1883 | ||
f3acb3a8 | 1884 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 1885 | RB_CLEAR_NODE(&th->rb_node); |
91e467bc | 1886 | --threads->nr; |
236a3bbd | 1887 | /* |
f3b623b8 ACM |
1888 | * Move it first to the dead_threads list, then drop the reference, |
1889 | * if this is the last reference, then the thread__delete destructor | |
1890 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd | 1891 | */ |
91e467bc | 1892 | list_add_tail(&th->node, &threads->dead); |
4c00af0e ACM |
1893 | |
1894 | /* | |
1895 | * We need to do the put here because if this is the last refcount, | |
1896 | * then we will be touching the threads->dead head when removing the | |
1897 | * thread. | |
1898 | */ | |
1899 | thread__put(th); | |
1900 | ||
b91fc39f | 1901 | if (lock) |
0a7c74ea | 1902 | up_write(&threads->lock); |
236a3bbd DA |
1903 | } |
1904 | ||
b91fc39f ACM |
1905 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1906 | { | |
1907 | return __machine__remove_thread(machine, th, true); | |
1908 | } | |
1909 | ||
162f0bef FW |
1910 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1911 | struct perf_sample *sample) | |
b0a7d1a0 | 1912 | { |
d75e6097 JO |
1913 | struct thread *thread = machine__find_thread(machine, |
1914 | event->fork.pid, | |
1915 | event->fork.tid); | |
314add6b AH |
1916 | struct thread *parent = machine__findnew_thread(machine, |
1917 | event->fork.ppid, | |
1918 | event->fork.ptid); | |
4f8f382e | 1919 | bool do_maps_clone = true; |
b91fc39f | 1920 | int err = 0; |
b0a7d1a0 | 1921 | |
5cb73340 AH |
1922 | if (dump_trace) |
1923 | perf_event__fprintf_task(event, stdout); | |
1924 | ||
1925 | /* | |
1926 | * There may be an existing thread that is not actually the parent, | |
1927 | * either because we are processing events out of order, or because the | |
1928 | * (fork) event that would have removed the thread was lost. Assume the | |
1929 | * latter case and continue on as best we can. | |
1930 | */ | |
1931 | if (parent->pid_ != (pid_t)event->fork.ppid) { | |
1932 | dump_printf("removing erroneous parent thread %d/%d\n", | |
1933 | parent->pid_, parent->tid); | |
1934 | machine__remove_thread(machine, parent); | |
1935 | thread__put(parent); | |
1936 | parent = machine__findnew_thread(machine, event->fork.ppid, | |
1937 | event->fork.ptid); | |
1938 | } | |
1939 | ||
236a3bbd | 1940 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1941 | if (thread != NULL) { |
236a3bbd | 1942 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1943 | thread__put(thread); |
1944 | } | |
236a3bbd | 1945 | |
314add6b AH |
1946 | thread = machine__findnew_thread(machine, event->fork.pid, |
1947 | event->fork.tid); | |
4f8f382e DM |
1948 | /* |
1949 | * When synthesizing FORK events, we are trying to create thread | |
1950 | * objects for the already running tasks on the machine. | |
1951 | * | |
1952 | * Normally, for a kernel FORK event, we want to clone the parent's | |
1953 | * maps because that is what the kernel just did. | |
1954 | * | |
1955 | * But when synthesizing, this should not be done. If we do, we end up | |
4d39c89f | 1956 | * with overlapping maps as we process the synthesized MMAP2 events that |
4f8f382e DM |
1957 | * get delivered shortly thereafter. |
1958 | * | |
1959 | * Use the FORK event misc flags in an internal way to signal this | |
1960 | * situation, so we can elide the map clone when appropriate. | |
1961 | */ | |
1962 | if (event->fork.header.misc & PERF_RECORD_MISC_FORK_EXEC) | |
1963 | do_maps_clone = false; | |
b0a7d1a0 ACM |
1964 | |
1965 | if (thread == NULL || parent == NULL || | |
4f8f382e | 1966 | thread__fork(thread, parent, sample->time, do_maps_clone) < 0) { |
b0a7d1a0 | 1967 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1968 | err = -1; |
b0a7d1a0 | 1969 | } |
b91fc39f ACM |
1970 | thread__put(thread); |
1971 | thread__put(parent); | |
b0a7d1a0 | 1972 | |
b91fc39f | 1973 | return err; |
b0a7d1a0 ACM |
1974 | } |
1975 | ||
162f0bef FW |
1976 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1977 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1978 | { |
d75e6097 JO |
1979 | struct thread *thread = machine__find_thread(machine, |
1980 | event->fork.pid, | |
1981 | event->fork.tid); | |
b0a7d1a0 ACM |
1982 | |
1983 | if (dump_trace) | |
1984 | perf_event__fprintf_task(event, stdout); | |
1985 | ||
b91fc39f | 1986 | if (thread != NULL) { |
236a3bbd | 1987 | thread__exited(thread); |
b91fc39f ACM |
1988 | thread__put(thread); |
1989 | } | |
b0a7d1a0 ACM |
1990 | |
1991 | return 0; | |
1992 | } | |
1993 | ||
162f0bef FW |
1994 | int machine__process_event(struct machine *machine, union perf_event *event, |
1995 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1996 | { |
1997 | int ret; | |
1998 | ||
1999 | switch (event->header.type) { | |
2000 | case PERF_RECORD_COMM: | |
162f0bef | 2001 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 2002 | case PERF_RECORD_MMAP: |
162f0bef | 2003 | ret = machine__process_mmap_event(machine, event, sample); break; |
f3b3614a HB |
2004 | case PERF_RECORD_NAMESPACES: |
2005 | ret = machine__process_namespaces_event(machine, event, sample); break; | |
ba78c1c5 NK |
2006 | case PERF_RECORD_CGROUP: |
2007 | ret = machine__process_cgroup_event(machine, event, sample); break; | |
5c5e854b | 2008 | case PERF_RECORD_MMAP2: |
162f0bef | 2009 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 2010 | case PERF_RECORD_FORK: |
162f0bef | 2011 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 2012 | case PERF_RECORD_EXIT: |
162f0bef | 2013 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 2014 | case PERF_RECORD_LOST: |
162f0bef | 2015 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
2016 | case PERF_RECORD_AUX: |
2017 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 | 2018 | case PERF_RECORD_ITRACE_START: |
ceb92913 | 2019 | ret = machine__process_itrace_start_event(machine, event); break; |
c4937a91 KL |
2020 | case PERF_RECORD_LOST_SAMPLES: |
2021 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0286039f AH |
2022 | case PERF_RECORD_SWITCH: |
2023 | case PERF_RECORD_SWITCH_CPU_WIDE: | |
2024 | ret = machine__process_switch_event(machine, event); break; | |
9aa0bfa3 SL |
2025 | case PERF_RECORD_KSYMBOL: |
2026 | ret = machine__process_ksymbol(machine, event, sample); break; | |
45178a92 | 2027 | case PERF_RECORD_BPF_EVENT: |
3f604b5f | 2028 | ret = machine__process_bpf(machine, event, sample); break; |
246eba8e AH |
2029 | case PERF_RECORD_TEXT_POKE: |
2030 | ret = machine__process_text_poke(machine, event, sample); break; | |
b0a7d1a0 ACM |
2031 | default: |
2032 | ret = -1; | |
2033 | break; | |
2034 | } | |
2035 | ||
2036 | return ret; | |
2037 | } | |
3f067dca | 2038 | |
b21484f1 | 2039 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 2040 | { |
a7c3899c | 2041 | if (!regexec(regex, sym->name, 0, NULL, 0)) |
83ff0f93 JC |
2042 | return true; |
2043 | return false; | |
3f067dca ACM |
2044 | } |
2045 | ||
bb871a9c | 2046 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
2047 | struct addr_map_symbol *ams, |
2048 | u64 ip) | |
2049 | { | |
2050 | struct addr_location al; | |
3f067dca ACM |
2051 | |
2052 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
2053 | /* |
2054 | * We cannot use the header.misc hint to determine whether a | |
2055 | * branch stack address is user, kernel, guest, hypervisor. | |
2056 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
2057 | * Thus, we have to try consecutively until we find a match | |
2058 | * or else, the symbol is unknown | |
2059 | */ | |
26bd9331 | 2060 | thread__find_cpumode_addr_location(thread, ip, &al); |
3f067dca | 2061 | |
3f067dca ACM |
2062 | ams->addr = ip; |
2063 | ams->al_addr = al.addr; | |
f2eaea09 | 2064 | ams->ms.maps = al.maps; |
d46a4cdf ACM |
2065 | ams->ms.sym = al.sym; |
2066 | ams->ms.map = al.map; | |
8780fb25 | 2067 | ams->phys_addr = 0; |
a50d03e3 | 2068 | ams->data_page_size = 0; |
3f067dca ACM |
2069 | } |
2070 | ||
bb871a9c | 2071 | static void ip__resolve_data(struct thread *thread, |
8780fb25 | 2072 | u8 m, struct addr_map_symbol *ams, |
a50d03e3 | 2073 | u64 addr, u64 phys_addr, u64 daddr_page_size) |
98a3b32c SE |
2074 | { |
2075 | struct addr_location al; | |
2076 | ||
2077 | memset(&al, 0, sizeof(al)); | |
2078 | ||
117d3c24 | 2079 | thread__find_symbol(thread, m, addr, &al); |
06b2afc0 | 2080 | |
98a3b32c SE |
2081 | ams->addr = addr; |
2082 | ams->al_addr = al.addr; | |
f2eaea09 | 2083 | ams->ms.maps = al.maps; |
d46a4cdf ACM |
2084 | ams->ms.sym = al.sym; |
2085 | ams->ms.map = al.map; | |
8780fb25 | 2086 | ams->phys_addr = phys_addr; |
a50d03e3 | 2087 | ams->data_page_size = daddr_page_size; |
98a3b32c SE |
2088 | } |
2089 | ||
e80faac0 ACM |
2090 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
2091 | struct addr_location *al) | |
98a3b32c | 2092 | { |
9f87498f | 2093 | struct mem_info *mi = mem_info__new(); |
98a3b32c SE |
2094 | |
2095 | if (!mi) | |
2096 | return NULL; | |
2097 | ||
bb871a9c | 2098 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
8780fb25 | 2099 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, |
a50d03e3 KL |
2100 | sample->addr, sample->phys_addr, |
2101 | sample->data_page_size); | |
98a3b32c SE |
2102 | mi->data_src.val = sample->data_src; |
2103 | ||
2104 | return mi; | |
2105 | } | |
2106 | ||
5f0fef8a | 2107 | static char *callchain_srcline(struct map_symbol *ms, u64 ip) |
40a342cd | 2108 | { |
5f0fef8a | 2109 | struct map *map = ms->map; |
21ac9d54 MW |
2110 | char *srcline = NULL; |
2111 | ||
40a342cd | 2112 | if (!map || callchain_param.key == CCKEY_FUNCTION) |
21ac9d54 MW |
2113 | return srcline; |
2114 | ||
2115 | srcline = srcline__tree_find(&map->dso->srclines, ip); | |
2116 | if (!srcline) { | |
2117 | bool show_sym = false; | |
2118 | bool show_addr = callchain_param.key == CCKEY_ADDRESS; | |
2119 | ||
2120 | srcline = get_srcline(map->dso, map__rip_2objdump(map, ip), | |
5f0fef8a | 2121 | ms->sym, show_sym, show_addr, ip); |
21ac9d54 MW |
2122 | srcline__tree_insert(&map->dso->srclines, ip, srcline); |
2123 | } | |
40a342cd | 2124 | |
21ac9d54 | 2125 | return srcline; |
40a342cd MW |
2126 | } |
2127 | ||
c4ee0625 JY |
2128 | struct iterations { |
2129 | int nr_loop_iter; | |
2130 | u64 cycles; | |
2131 | }; | |
2132 | ||
37592b8a | 2133 | static int add_callchain_ip(struct thread *thread, |
91d7b2de | 2134 | struct callchain_cursor *cursor, |
37592b8a AK |
2135 | struct symbol **parent, |
2136 | struct addr_location *root_al, | |
73dbcd65 | 2137 | u8 *cpumode, |
410024db JY |
2138 | u64 ip, |
2139 | bool branch, | |
2140 | struct branch_flags *flags, | |
c4ee0625 | 2141 | struct iterations *iter, |
b851dd49 | 2142 | u64 branch_from) |
37592b8a | 2143 | { |
5f0fef8a | 2144 | struct map_symbol ms; |
37592b8a | 2145 | struct addr_location al; |
c4ee0625 JY |
2146 | int nr_loop_iter = 0; |
2147 | u64 iter_cycles = 0; | |
40a342cd | 2148 | const char *srcline = NULL; |
37592b8a AK |
2149 | |
2150 | al.filtered = 0; | |
2151 | al.sym = NULL; | |
57f0ff05 | 2152 | al.srcline = NULL; |
73dbcd65 | 2153 | if (!cpumode) { |
26bd9331 | 2154 | thread__find_cpumode_addr_location(thread, ip, &al); |
73dbcd65 | 2155 | } else { |
2e77784b KL |
2156 | if (ip >= PERF_CONTEXT_MAX) { |
2157 | switch (ip) { | |
2158 | case PERF_CONTEXT_HV: | |
73dbcd65 | 2159 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
2160 | break; |
2161 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 2162 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
2163 | break; |
2164 | case PERF_CONTEXT_USER: | |
73dbcd65 | 2165 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
2166 | break; |
2167 | default: | |
2168 | pr_debug("invalid callchain context: " | |
2169 | "%"PRId64"\n", (s64) ip); | |
2170 | /* | |
2171 | * It seems the callchain is corrupted. | |
2172 | * Discard all. | |
2173 | */ | |
91d7b2de | 2174 | callchain_cursor_reset(cursor); |
2e77784b KL |
2175 | return 1; |
2176 | } | |
2177 | return 0; | |
2178 | } | |
4546263d | 2179 | thread__find_symbol(thread, *cpumode, ip, &al); |
2e77784b KL |
2180 | } |
2181 | ||
37592b8a | 2182 | if (al.sym != NULL) { |
de7e6a7c | 2183 | if (perf_hpp_list.parent && !*parent && |
37592b8a AK |
2184 | symbol__match_regex(al.sym, &parent_regex)) |
2185 | *parent = al.sym; | |
2186 | else if (have_ignore_callees && root_al && | |
2187 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
2188 | /* Treat this symbol as the root, | |
2189 | forgetting its callees. */ | |
2190 | *root_al = al; | |
91d7b2de | 2191 | callchain_cursor_reset(cursor); |
37592b8a AK |
2192 | } |
2193 | } | |
2194 | ||
b49a8fe5 NK |
2195 | if (symbol_conf.hide_unresolved && al.sym == NULL) |
2196 | return 0; | |
c4ee0625 JY |
2197 | |
2198 | if (iter) { | |
2199 | nr_loop_iter = iter->nr_loop_iter; | |
2200 | iter_cycles = iter->cycles; | |
2201 | } | |
2202 | ||
f2eaea09 | 2203 | ms.maps = al.maps; |
5f0fef8a ACM |
2204 | ms.map = al.map; |
2205 | ms.sym = al.sym; | |
2206 | srcline = callchain_srcline(&ms, al.addr); | |
2207 | return callchain_cursor_append(cursor, ip, &ms, | |
c4ee0625 | 2208 | branch, flags, nr_loop_iter, |
40a342cd | 2209 | iter_cycles, branch_from, srcline); |
37592b8a AK |
2210 | } |
2211 | ||
644f2df2 ACM |
2212 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
2213 | struct addr_location *al) | |
3f067dca | 2214 | { |
3f067dca | 2215 | unsigned int i; |
644f2df2 | 2216 | const struct branch_stack *bs = sample->branch_stack; |
42bbabed | 2217 | struct branch_entry *entries = perf_sample__branch_entries(sample); |
644f2df2 | 2218 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); |
3f067dca | 2219 | |
3f067dca ACM |
2220 | if (!bi) |
2221 | return NULL; | |
2222 | ||
2223 | for (i = 0; i < bs->nr; i++) { | |
42bbabed KL |
2224 | ip__resolve_ams(al->thread, &bi[i].to, entries[i].to); |
2225 | ip__resolve_ams(al->thread, &bi[i].from, entries[i].from); | |
2226 | bi[i].flags = entries[i].flags; | |
3f067dca ACM |
2227 | } |
2228 | return bi; | |
2229 | } | |
2230 | ||
c4ee0625 JY |
2231 | static void save_iterations(struct iterations *iter, |
2232 | struct branch_entry *be, int nr) | |
2233 | { | |
2234 | int i; | |
2235 | ||
a3366db0 | 2236 | iter->nr_loop_iter++; |
c4ee0625 JY |
2237 | iter->cycles = 0; |
2238 | ||
2239 | for (i = 0; i < nr; i++) | |
2240 | iter->cycles += be[i].flags.cycles; | |
2241 | } | |
2242 | ||
8b7bad58 AK |
2243 | #define CHASHSZ 127 |
2244 | #define CHASHBITS 7 | |
2245 | #define NO_ENTRY 0xff | |
2246 | ||
2247 | #define PERF_MAX_BRANCH_DEPTH 127 | |
2248 | ||
2249 | /* Remove loops. */ | |
c4ee0625 JY |
2250 | static int remove_loops(struct branch_entry *l, int nr, |
2251 | struct iterations *iter) | |
8b7bad58 AK |
2252 | { |
2253 | int i, j, off; | |
2254 | unsigned char chash[CHASHSZ]; | |
2255 | ||
2256 | memset(chash, NO_ENTRY, sizeof(chash)); | |
2257 | ||
2258 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
2259 | ||
2260 | for (i = 0; i < nr; i++) { | |
2261 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
2262 | ||
2263 | /* no collision handling for now */ | |
2264 | if (chash[h] == NO_ENTRY) { | |
2265 | chash[h] = i; | |
2266 | } else if (l[chash[h]].from == l[i].from) { | |
2267 | bool is_loop = true; | |
2268 | /* check if it is a real loop */ | |
2269 | off = 0; | |
2270 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
2271 | if (l[j].from != l[i + off].from) { | |
2272 | is_loop = false; | |
2273 | break; | |
2274 | } | |
2275 | if (is_loop) { | |
c4ee0625 JY |
2276 | j = nr - (i + off); |
2277 | if (j > 0) { | |
2278 | save_iterations(iter + i + off, | |
2279 | l + i, off); | |
2280 | ||
2281 | memmove(iter + i, iter + i + off, | |
2282 | j * sizeof(*iter)); | |
2283 | ||
2284 | memmove(l + i, l + i + off, | |
2285 | j * sizeof(*l)); | |
2286 | } | |
2287 | ||
8b7bad58 AK |
2288 | nr -= off; |
2289 | } | |
2290 | } | |
2291 | } | |
2292 | return nr; | |
2293 | } | |
2294 | ||
dd3e249a KL |
2295 | static int lbr_callchain_add_kernel_ip(struct thread *thread, |
2296 | struct callchain_cursor *cursor, | |
2297 | struct perf_sample *sample, | |
2298 | struct symbol **parent, | |
2299 | struct addr_location *root_al, | |
2300 | u64 branch_from, | |
2301 | bool callee, int end) | |
2302 | { | |
2303 | struct ip_callchain *chain = sample->callchain; | |
2304 | u8 cpumode = PERF_RECORD_MISC_USER; | |
2305 | int err, i; | |
2306 | ||
2307 | if (callee) { | |
2308 | for (i = 0; i < end + 1; i++) { | |
2309 | err = add_callchain_ip(thread, cursor, parent, | |
2310 | root_al, &cpumode, chain->ips[i], | |
2311 | false, NULL, NULL, branch_from); | |
2312 | if (err) | |
2313 | return err; | |
2314 | } | |
2315 | return 0; | |
2316 | } | |
2317 | ||
2318 | for (i = end; i >= 0; i--) { | |
2319 | err = add_callchain_ip(thread, cursor, parent, | |
2320 | root_al, &cpumode, chain->ips[i], | |
2321 | false, NULL, NULL, branch_from); | |
2322 | if (err) | |
2323 | return err; | |
2324 | } | |
2325 | ||
2326 | return 0; | |
2327 | } | |
2328 | ||
7f1d3931 KL |
2329 | static void save_lbr_cursor_node(struct thread *thread, |
2330 | struct callchain_cursor *cursor, | |
2331 | int idx) | |
2332 | { | |
2333 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2334 | ||
2335 | if (!lbr_stitch) | |
2336 | return; | |
2337 | ||
2338 | if (cursor->pos == cursor->nr) { | |
2339 | lbr_stitch->prev_lbr_cursor[idx].valid = false; | |
2340 | return; | |
2341 | } | |
2342 | ||
2343 | if (!cursor->curr) | |
2344 | cursor->curr = cursor->first; | |
2345 | else | |
2346 | cursor->curr = cursor->curr->next; | |
2347 | memcpy(&lbr_stitch->prev_lbr_cursor[idx], cursor->curr, | |
2348 | sizeof(struct callchain_cursor_node)); | |
2349 | ||
2350 | lbr_stitch->prev_lbr_cursor[idx].valid = true; | |
2351 | cursor->pos++; | |
2352 | } | |
2353 | ||
e2b23483 KL |
2354 | static int lbr_callchain_add_lbr_ip(struct thread *thread, |
2355 | struct callchain_cursor *cursor, | |
2356 | struct perf_sample *sample, | |
2357 | struct symbol **parent, | |
2358 | struct addr_location *root_al, | |
2359 | u64 *branch_from, | |
2360 | bool callee) | |
2361 | { | |
2362 | struct branch_stack *lbr_stack = sample->branch_stack; | |
2363 | struct branch_entry *entries = perf_sample__branch_entries(sample); | |
2364 | u8 cpumode = PERF_RECORD_MISC_USER; | |
2365 | int lbr_nr = lbr_stack->nr; | |
2366 | struct branch_flags *flags; | |
2367 | int err, i; | |
2368 | u64 ip; | |
2369 | ||
7f1d3931 KL |
2370 | /* |
2371 | * The curr and pos are not used in writing session. They are cleared | |
2372 | * in callchain_cursor_commit() when the writing session is closed. | |
2373 | * Using curr and pos to track the current cursor node. | |
2374 | */ | |
2375 | if (thread->lbr_stitch) { | |
2376 | cursor->curr = NULL; | |
2377 | cursor->pos = cursor->nr; | |
2378 | if (cursor->nr) { | |
2379 | cursor->curr = cursor->first; | |
2380 | for (i = 0; i < (int)(cursor->nr - 1); i++) | |
2381 | cursor->curr = cursor->curr->next; | |
2382 | } | |
2383 | } | |
2384 | ||
e2b23483 KL |
2385 | if (callee) { |
2386 | /* Add LBR ip from first entries.to */ | |
2387 | ip = entries[0].to; | |
2388 | flags = &entries[0].flags; | |
2389 | *branch_from = entries[0].from; | |
2390 | err = add_callchain_ip(thread, cursor, parent, | |
2391 | root_al, &cpumode, ip, | |
2392 | true, flags, NULL, | |
2393 | *branch_from); | |
2394 | if (err) | |
2395 | return err; | |
2396 | ||
7f1d3931 KL |
2397 | /* |
2398 | * The number of cursor node increases. | |
2399 | * Move the current cursor node. | |
2400 | * But does not need to save current cursor node for entry 0. | |
2401 | * It's impossible to stitch the whole LBRs of previous sample. | |
2402 | */ | |
2403 | if (thread->lbr_stitch && (cursor->pos != cursor->nr)) { | |
2404 | if (!cursor->curr) | |
2405 | cursor->curr = cursor->first; | |
2406 | else | |
2407 | cursor->curr = cursor->curr->next; | |
2408 | cursor->pos++; | |
2409 | } | |
2410 | ||
e2b23483 KL |
2411 | /* Add LBR ip from entries.from one by one. */ |
2412 | for (i = 0; i < lbr_nr; i++) { | |
2413 | ip = entries[i].from; | |
2414 | flags = &entries[i].flags; | |
2415 | err = add_callchain_ip(thread, cursor, parent, | |
2416 | root_al, &cpumode, ip, | |
2417 | true, flags, NULL, | |
2418 | *branch_from); | |
2419 | if (err) | |
2420 | return err; | |
7f1d3931 | 2421 | save_lbr_cursor_node(thread, cursor, i); |
e2b23483 KL |
2422 | } |
2423 | return 0; | |
2424 | } | |
2425 | ||
2426 | /* Add LBR ip from entries.from one by one. */ | |
2427 | for (i = lbr_nr - 1; i >= 0; i--) { | |
2428 | ip = entries[i].from; | |
2429 | flags = &entries[i].flags; | |
2430 | err = add_callchain_ip(thread, cursor, parent, | |
2431 | root_al, &cpumode, ip, | |
2432 | true, flags, NULL, | |
2433 | *branch_from); | |
2434 | if (err) | |
2435 | return err; | |
7f1d3931 | 2436 | save_lbr_cursor_node(thread, cursor, i); |
e2b23483 KL |
2437 | } |
2438 | ||
2439 | /* Add LBR ip from first entries.to */ | |
2440 | ip = entries[0].to; | |
2441 | flags = &entries[0].flags; | |
2442 | *branch_from = entries[0].from; | |
2443 | err = add_callchain_ip(thread, cursor, parent, | |
2444 | root_al, &cpumode, ip, | |
2445 | true, flags, NULL, | |
2446 | *branch_from); | |
2447 | if (err) | |
2448 | return err; | |
2449 | ||
2450 | return 0; | |
2451 | } | |
2452 | ||
ff165628 KL |
2453 | static int lbr_callchain_add_stitched_lbr_ip(struct thread *thread, |
2454 | struct callchain_cursor *cursor) | |
2455 | { | |
2456 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2457 | struct callchain_cursor_node *cnode; | |
2458 | struct stitch_list *stitch_node; | |
2459 | int err; | |
2460 | ||
2461 | list_for_each_entry(stitch_node, &lbr_stitch->lists, node) { | |
2462 | cnode = &stitch_node->cursor; | |
2463 | ||
2464 | err = callchain_cursor_append(cursor, cnode->ip, | |
2465 | &cnode->ms, | |
2466 | cnode->branch, | |
2467 | &cnode->branch_flags, | |
2468 | cnode->nr_loop_iter, | |
2469 | cnode->iter_cycles, | |
2470 | cnode->branch_from, | |
2471 | cnode->srcline); | |
2472 | if (err) | |
2473 | return err; | |
2474 | } | |
2475 | return 0; | |
2476 | } | |
2477 | ||
2478 | static struct stitch_list *get_stitch_node(struct thread *thread) | |
2479 | { | |
2480 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2481 | struct stitch_list *stitch_node; | |
2482 | ||
2483 | if (!list_empty(&lbr_stitch->free_lists)) { | |
2484 | stitch_node = list_first_entry(&lbr_stitch->free_lists, | |
2485 | struct stitch_list, node); | |
2486 | list_del(&stitch_node->node); | |
2487 | ||
2488 | return stitch_node; | |
2489 | } | |
2490 | ||
2491 | return malloc(sizeof(struct stitch_list)); | |
2492 | } | |
2493 | ||
2494 | static bool has_stitched_lbr(struct thread *thread, | |
2495 | struct perf_sample *cur, | |
2496 | struct perf_sample *prev, | |
2497 | unsigned int max_lbr, | |
2498 | bool callee) | |
2499 | { | |
2500 | struct branch_stack *cur_stack = cur->branch_stack; | |
2501 | struct branch_entry *cur_entries = perf_sample__branch_entries(cur); | |
2502 | struct branch_stack *prev_stack = prev->branch_stack; | |
2503 | struct branch_entry *prev_entries = perf_sample__branch_entries(prev); | |
2504 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2505 | int i, j, nr_identical_branches = 0; | |
2506 | struct stitch_list *stitch_node; | |
2507 | u64 cur_base, distance; | |
2508 | ||
2509 | if (!cur_stack || !prev_stack) | |
2510 | return false; | |
2511 | ||
2512 | /* Find the physical index of the base-of-stack for current sample. */ | |
2513 | cur_base = max_lbr - cur_stack->nr + cur_stack->hw_idx + 1; | |
2514 | ||
2515 | distance = (prev_stack->hw_idx > cur_base) ? (prev_stack->hw_idx - cur_base) : | |
2516 | (max_lbr + prev_stack->hw_idx - cur_base); | |
2517 | /* Previous sample has shorter stack. Nothing can be stitched. */ | |
2518 | if (distance + 1 > prev_stack->nr) | |
2519 | return false; | |
2520 | ||
2521 | /* | |
2522 | * Check if there are identical LBRs between two samples. | |
4d39c89f | 2523 | * Identical LBRs must have same from, to and flags values. Also, |
ff165628 KL |
2524 | * they have to be saved in the same LBR registers (same physical |
2525 | * index). | |
2526 | * | |
2527 | * Starts from the base-of-stack of current sample. | |
2528 | */ | |
2529 | for (i = distance, j = cur_stack->nr - 1; (i >= 0) && (j >= 0); i--, j--) { | |
2530 | if ((prev_entries[i].from != cur_entries[j].from) || | |
2531 | (prev_entries[i].to != cur_entries[j].to) || | |
2532 | (prev_entries[i].flags.value != cur_entries[j].flags.value)) | |
2533 | break; | |
2534 | nr_identical_branches++; | |
2535 | } | |
2536 | ||
2537 | if (!nr_identical_branches) | |
2538 | return false; | |
2539 | ||
2540 | /* | |
2541 | * Save the LBRs between the base-of-stack of previous sample | |
2542 | * and the base-of-stack of current sample into lbr_stitch->lists. | |
2543 | * These LBRs will be stitched later. | |
2544 | */ | |
2545 | for (i = prev_stack->nr - 1; i > (int)distance; i--) { | |
2546 | ||
2547 | if (!lbr_stitch->prev_lbr_cursor[i].valid) | |
2548 | continue; | |
2549 | ||
2550 | stitch_node = get_stitch_node(thread); | |
2551 | if (!stitch_node) | |
2552 | return false; | |
2553 | ||
2554 | memcpy(&stitch_node->cursor, &lbr_stitch->prev_lbr_cursor[i], | |
2555 | sizeof(struct callchain_cursor_node)); | |
2556 | ||
2557 | if (callee) | |
2558 | list_add(&stitch_node->node, &lbr_stitch->lists); | |
2559 | else | |
2560 | list_add_tail(&stitch_node->node, &lbr_stitch->lists); | |
2561 | } | |
2562 | ||
2563 | return true; | |
2564 | } | |
2565 | ||
7f1d3931 | 2566 | static bool alloc_lbr_stitch(struct thread *thread, unsigned int max_lbr) |
9c6c3f47 KL |
2567 | { |
2568 | if (thread->lbr_stitch) | |
2569 | return true; | |
2570 | ||
2571 | thread->lbr_stitch = zalloc(sizeof(*thread->lbr_stitch)); | |
2572 | if (!thread->lbr_stitch) | |
2573 | goto err; | |
2574 | ||
7f1d3931 KL |
2575 | thread->lbr_stitch->prev_lbr_cursor = calloc(max_lbr + 1, sizeof(struct callchain_cursor_node)); |
2576 | if (!thread->lbr_stitch->prev_lbr_cursor) | |
2577 | goto free_lbr_stitch; | |
2578 | ||
ff165628 KL |
2579 | INIT_LIST_HEAD(&thread->lbr_stitch->lists); |
2580 | INIT_LIST_HEAD(&thread->lbr_stitch->free_lists); | |
2581 | ||
7f1d3931 KL |
2582 | return true; |
2583 | ||
2584 | free_lbr_stitch: | |
2585 | zfree(&thread->lbr_stitch); | |
9c6c3f47 KL |
2586 | err: |
2587 | pr_warning("Failed to allocate space for stitched LBRs. Disable LBR stitch\n"); | |
2588 | thread->lbr_stitch_enable = false; | |
2589 | return false; | |
2590 | } | |
2591 | ||
384b6055 | 2592 | /* |
4d39c89f | 2593 | * Resolve LBR callstack chain sample |
384b6055 KL |
2594 | * Return: |
2595 | * 1 on success get LBR callchain information | |
2596 | * 0 no available LBR callchain information, should try fp | |
2597 | * negative error code on other errors. | |
2598 | */ | |
2599 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
91d7b2de | 2600 | struct callchain_cursor *cursor, |
384b6055 KL |
2601 | struct perf_sample *sample, |
2602 | struct symbol **parent, | |
2603 | struct addr_location *root_al, | |
7f1d3931 KL |
2604 | int max_stack, |
2605 | unsigned int max_lbr) | |
3f067dca | 2606 | { |
ff165628 | 2607 | bool callee = (callchain_param.order == ORDER_CALLEE); |
384b6055 | 2608 | struct ip_callchain *chain = sample->callchain; |
18ef15c6 | 2609 | int chain_nr = min(max_stack, (int)chain->nr), i; |
9c6c3f47 | 2610 | struct lbr_stitch *lbr_stitch; |
ff165628 | 2611 | bool stitched_lbr = false; |
e2b23483 | 2612 | u64 branch_from = 0; |
e48b8311 | 2613 | int err; |
384b6055 KL |
2614 | |
2615 | for (i = 0; i < chain_nr; i++) { | |
2616 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
2617 | break; | |
2618 | } | |
2619 | ||
2620 | /* LBR only affects the user callchain */ | |
f8603267 KL |
2621 | if (i == chain_nr) |
2622 | return 0; | |
2623 | ||
9c6c3f47 | 2624 | if (thread->lbr_stitch_enable && !sample->no_hw_idx && |
7f1d3931 | 2625 | (max_lbr > 0) && alloc_lbr_stitch(thread, max_lbr)) { |
9c6c3f47 KL |
2626 | lbr_stitch = thread->lbr_stitch; |
2627 | ||
ff165628 KL |
2628 | stitched_lbr = has_stitched_lbr(thread, sample, |
2629 | &lbr_stitch->prev_sample, | |
2630 | max_lbr, callee); | |
2631 | ||
2632 | if (!stitched_lbr && !list_empty(&lbr_stitch->lists)) { | |
2633 | list_replace_init(&lbr_stitch->lists, | |
2634 | &lbr_stitch->free_lists); | |
2635 | } | |
9c6c3f47 KL |
2636 | memcpy(&lbr_stitch->prev_sample, sample, sizeof(*sample)); |
2637 | } | |
2638 | ||
ff165628 | 2639 | if (callee) { |
e48b8311 | 2640 | /* Add kernel ip */ |
dd3e249a KL |
2641 | err = lbr_callchain_add_kernel_ip(thread, cursor, sample, |
2642 | parent, root_al, branch_from, | |
2643 | true, i); | |
2644 | if (err) | |
2645 | goto error; | |
2646 | ||
e2b23483 KL |
2647 | err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent, |
2648 | root_al, &branch_from, true); | |
e48b8311 KL |
2649 | if (err) |
2650 | goto error; | |
384b6055 | 2651 | |
ff165628 KL |
2652 | if (stitched_lbr) { |
2653 | err = lbr_callchain_add_stitched_lbr_ip(thread, cursor); | |
2654 | if (err) | |
2655 | goto error; | |
2656 | } | |
2657 | ||
e48b8311 | 2658 | } else { |
ff165628 KL |
2659 | if (stitched_lbr) { |
2660 | err = lbr_callchain_add_stitched_lbr_ip(thread, cursor); | |
2661 | if (err) | |
2662 | goto error; | |
2663 | } | |
e2b23483 KL |
2664 | err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent, |
2665 | root_al, &branch_from, false); | |
f8603267 | 2666 | if (err) |
e48b8311 KL |
2667 | goto error; |
2668 | ||
2669 | /* Add kernel ip */ | |
dd3e249a KL |
2670 | err = lbr_callchain_add_kernel_ip(thread, cursor, sample, |
2671 | parent, root_al, branch_from, | |
2672 | false, i); | |
2673 | if (err) | |
2674 | goto error; | |
f8603267 KL |
2675 | } |
2676 | return 1; | |
e48b8311 KL |
2677 | |
2678 | error: | |
2679 | return (err < 0) ? err : 0; | |
384b6055 KL |
2680 | } |
2681 | ||
e9024d51 DM |
2682 | static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread, |
2683 | struct callchain_cursor *cursor, | |
2684 | struct symbol **parent, | |
2685 | struct addr_location *root_al, | |
2686 | u8 *cpumode, int ent) | |
2687 | { | |
2688 | int err = 0; | |
2689 | ||
2690 | while (--ent >= 0) { | |
2691 | u64 ip = chain->ips[ent]; | |
2692 | ||
2693 | if (ip >= PERF_CONTEXT_MAX) { | |
2694 | err = add_callchain_ip(thread, cursor, parent, | |
2695 | root_al, cpumode, ip, | |
2696 | false, NULL, NULL, 0); | |
2697 | break; | |
2698 | } | |
2699 | } | |
2700 | return err; | |
2701 | } | |
2702 | ||
384b6055 | 2703 | static int thread__resolve_callchain_sample(struct thread *thread, |
91d7b2de | 2704 | struct callchain_cursor *cursor, |
32dcd021 | 2705 | struct evsel *evsel, |
384b6055 KL |
2706 | struct perf_sample *sample, |
2707 | struct symbol **parent, | |
2708 | struct addr_location *root_al, | |
2709 | int max_stack) | |
2710 | { | |
2711 | struct branch_stack *branch = sample->branch_stack; | |
42bbabed | 2712 | struct branch_entry *entries = perf_sample__branch_entries(sample); |
384b6055 | 2713 | struct ip_callchain *chain = sample->callchain; |
b49a821e | 2714 | int chain_nr = 0; |
73dbcd65 | 2715 | u8 cpumode = PERF_RECORD_MISC_USER; |
bf8bddbf | 2716 | int i, j, err, nr_entries; |
8b7bad58 AK |
2717 | int skip_idx = -1; |
2718 | int first_call = 0; | |
2719 | ||
b49a821e JY |
2720 | if (chain) |
2721 | chain_nr = chain->nr; | |
2722 | ||
4f138a9e | 2723 | if (evsel__has_branch_callstack(evsel)) { |
6e6d1d65 | 2724 | struct perf_env *env = evsel__env(evsel); |
7f1d3931 | 2725 | |
91d7b2de | 2726 | err = resolve_lbr_callchain_sample(thread, cursor, sample, parent, |
7f1d3931 KL |
2727 | root_al, max_stack, |
2728 | !env ? 0 : env->max_branches); | |
384b6055 KL |
2729 | if (err) |
2730 | return (err < 0) ? err : 0; | |
2731 | } | |
2732 | ||
8b7bad58 AK |
2733 | /* |
2734 | * Based on DWARF debug information, some architectures skip | |
2735 | * a callchain entry saved by the kernel. | |
2736 | */ | |
bf8bddbf | 2737 | skip_idx = arch_skip_callchain_idx(thread, chain); |
3f067dca | 2738 | |
8b7bad58 AK |
2739 | /* |
2740 | * Add branches to call stack for easier browsing. This gives | |
2741 | * more context for a sample than just the callers. | |
2742 | * | |
2743 | * This uses individual histograms of paths compared to the | |
2744 | * aggregated histograms the normal LBR mode uses. | |
2745 | * | |
2746 | * Limitations for now: | |
2747 | * - No extra filters | |
2748 | * - No annotations (should annotate somehow) | |
2749 | */ | |
2750 | ||
2751 | if (branch && callchain_param.branch_callstack) { | |
2752 | int nr = min(max_stack, (int)branch->nr); | |
2753 | struct branch_entry be[nr]; | |
c4ee0625 | 2754 | struct iterations iter[nr]; |
8b7bad58 AK |
2755 | |
2756 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
2757 | pr_warning("corrupted branch chain. skipping...\n"); | |
2758 | goto check_calls; | |
2759 | } | |
2760 | ||
2761 | for (i = 0; i < nr; i++) { | |
2762 | if (callchain_param.order == ORDER_CALLEE) { | |
42bbabed | 2763 | be[i] = entries[i]; |
b49a821e JY |
2764 | |
2765 | if (chain == NULL) | |
2766 | continue; | |
2767 | ||
8b7bad58 AK |
2768 | /* |
2769 | * Check for overlap into the callchain. | |
2770 | * The return address is one off compared to | |
2771 | * the branch entry. To adjust for this | |
2772 | * assume the calling instruction is not longer | |
2773 | * than 8 bytes. | |
2774 | */ | |
2775 | if (i == skip_idx || | |
2776 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
2777 | first_call++; | |
2778 | else if (be[i].from < chain->ips[first_call] && | |
2779 | be[i].from >= chain->ips[first_call] - 8) | |
2780 | first_call++; | |
2781 | } else | |
42bbabed | 2782 | be[i] = entries[branch->nr - i - 1]; |
8b7bad58 AK |
2783 | } |
2784 | ||
c4ee0625 JY |
2785 | memset(iter, 0, sizeof(struct iterations) * nr); |
2786 | nr = remove_loops(be, nr, iter); | |
410024db | 2787 | |
8b7bad58 | 2788 | for (i = 0; i < nr; i++) { |
c4ee0625 JY |
2789 | err = add_callchain_ip(thread, cursor, parent, |
2790 | root_al, | |
2791 | NULL, be[i].to, | |
2792 | true, &be[i].flags, | |
2793 | NULL, be[i].from); | |
410024db | 2794 | |
8b7bad58 | 2795 | if (!err) |
91d7b2de | 2796 | err = add_callchain_ip(thread, cursor, parent, root_al, |
410024db JY |
2797 | NULL, be[i].from, |
2798 | true, &be[i].flags, | |
c4ee0625 | 2799 | &iter[i], 0); |
8b7bad58 AK |
2800 | if (err == -EINVAL) |
2801 | break; | |
2802 | if (err) | |
2803 | return err; | |
2804 | } | |
b49a821e JY |
2805 | |
2806 | if (chain_nr == 0) | |
2807 | return 0; | |
2808 | ||
8b7bad58 AK |
2809 | chain_nr -= nr; |
2810 | } | |
2811 | ||
2812 | check_calls: | |
aceb9826 | 2813 | if (chain && callchain_param.order != ORDER_CALLEE) { |
e9024d51 DM |
2814 | err = find_prev_cpumode(chain, thread, cursor, parent, root_al, |
2815 | &cpumode, chain->nr - first_call); | |
2816 | if (err) | |
2817 | return (err < 0) ? err : 0; | |
2818 | } | |
bf8bddbf | 2819 | for (i = first_call, nr_entries = 0; |
a29d5c9b | 2820 | i < chain_nr && nr_entries < max_stack; i++) { |
3f067dca | 2821 | u64 ip; |
3f067dca ACM |
2822 | |
2823 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 2824 | j = i; |
3f067dca | 2825 | else |
a60335ba SB |
2826 | j = chain->nr - i - 1; |
2827 | ||
2828 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
2829 | if (j == skip_idx) | |
2830 | continue; | |
2831 | #endif | |
2832 | ip = chain->ips[j]; | |
bf8bddbf ACM |
2833 | if (ip < PERF_CONTEXT_MAX) |
2834 | ++nr_entries; | |
e9024d51 DM |
2835 | else if (callchain_param.order != ORDER_CALLEE) { |
2836 | err = find_prev_cpumode(chain, thread, cursor, parent, | |
2837 | root_al, &cpumode, j); | |
2838 | if (err) | |
2839 | return (err < 0) ? err : 0; | |
2840 | continue; | |
2841 | } | |
a29d5c9b | 2842 | |
410024db JY |
2843 | err = add_callchain_ip(thread, cursor, parent, |
2844 | root_al, &cpumode, ip, | |
c4ee0625 | 2845 | false, NULL, NULL, 0); |
3f067dca | 2846 | |
3f067dca | 2847 | if (err) |
2e77784b | 2848 | return (err < 0) ? err : 0; |
3f067dca ACM |
2849 | } |
2850 | ||
2851 | return 0; | |
2852 | } | |
2853 | ||
c1529738 | 2854 | static int append_inlines(struct callchain_cursor *cursor, struct map_symbol *ms, u64 ip) |
11ea2515 | 2855 | { |
c1529738 ACM |
2856 | struct symbol *sym = ms->sym; |
2857 | struct map *map = ms->map; | |
11ea2515 MW |
2858 | struct inline_node *inline_node; |
2859 | struct inline_list *ilist; | |
2860 | u64 addr; | |
b38775cf | 2861 | int ret = 1; |
11ea2515 MW |
2862 | |
2863 | if (!symbol_conf.inline_name || !map || !sym) | |
b38775cf | 2864 | return ret; |
11ea2515 | 2865 | |
7a8a8fcf MW |
2866 | addr = map__map_ip(map, ip); |
2867 | addr = map__rip_2objdump(map, addr); | |
11ea2515 MW |
2868 | |
2869 | inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr); | |
2870 | if (!inline_node) { | |
2871 | inline_node = dso__parse_addr_inlines(map->dso, addr, sym); | |
2872 | if (!inline_node) | |
b38775cf | 2873 | return ret; |
11ea2515 MW |
2874 | inlines__tree_insert(&map->dso->inlined_nodes, inline_node); |
2875 | } | |
2876 | ||
2877 | list_for_each_entry(ilist, &inline_node->val, list) { | |
5f0fef8a | 2878 | struct map_symbol ilist_ms = { |
77b91c1a | 2879 | .maps = ms->maps, |
5f0fef8a ACM |
2880 | .map = map, |
2881 | .sym = ilist->symbol, | |
2882 | }; | |
2883 | ret = callchain_cursor_append(cursor, ip, &ilist_ms, false, | |
b38775cf | 2884 | NULL, 0, 0, 0, ilist->srcline); |
11ea2515 MW |
2885 | |
2886 | if (ret != 0) | |
2887 | return ret; | |
2888 | } | |
2889 | ||
b38775cf | 2890 | return ret; |
11ea2515 MW |
2891 | } |
2892 | ||
3f067dca ACM |
2893 | static int unwind_entry(struct unwind_entry *entry, void *arg) |
2894 | { | |
2895 | struct callchain_cursor *cursor = arg; | |
40a342cd | 2896 | const char *srcline = NULL; |
ff4ce288 | 2897 | u64 addr = entry->ip; |
b49a8fe5 | 2898 | |
c1529738 | 2899 | if (symbol_conf.hide_unresolved && entry->ms.sym == NULL) |
b49a8fe5 | 2900 | return 0; |
40a342cd | 2901 | |
c1529738 | 2902 | if (append_inlines(cursor, &entry->ms, entry->ip) == 0) |
11ea2515 MW |
2903 | return 0; |
2904 | ||
2a9d5050 SD |
2905 | /* |
2906 | * Convert entry->ip from a virtual address to an offset in | |
2907 | * its corresponding binary. | |
2908 | */ | |
c1529738 ACM |
2909 | if (entry->ms.map) |
2910 | addr = map__map_ip(entry->ms.map, entry->ip); | |
2a9d5050 | 2911 | |
5f0fef8a ACM |
2912 | srcline = callchain_srcline(&entry->ms, addr); |
2913 | return callchain_cursor_append(cursor, entry->ip, &entry->ms, | |
40a342cd | 2914 | false, NULL, 0, 0, 0, srcline); |
3f067dca ACM |
2915 | } |
2916 | ||
9919a65e CP |
2917 | static int thread__resolve_callchain_unwind(struct thread *thread, |
2918 | struct callchain_cursor *cursor, | |
32dcd021 | 2919 | struct evsel *evsel, |
9919a65e CP |
2920 | struct perf_sample *sample, |
2921 | int max_stack) | |
3f067dca | 2922 | { |
3f067dca | 2923 | /* Can we do dwarf post unwind? */ |
1fc632ce JO |
2924 | if (!((evsel->core.attr.sample_type & PERF_SAMPLE_REGS_USER) && |
2925 | (evsel->core.attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
3f067dca ACM |
2926 | return 0; |
2927 | ||
2928 | /* Bail out if nothing was captured. */ | |
2929 | if ((!sample->user_regs.regs) || | |
2930 | (!sample->user_stack.size)) | |
2931 | return 0; | |
2932 | ||
91d7b2de | 2933 | return unwind__get_entries(unwind_entry, cursor, |
352ea45a | 2934 | thread, sample, max_stack); |
9919a65e | 2935 | } |
3f067dca | 2936 | |
9919a65e CP |
2937 | int thread__resolve_callchain(struct thread *thread, |
2938 | struct callchain_cursor *cursor, | |
32dcd021 | 2939 | struct evsel *evsel, |
9919a65e CP |
2940 | struct perf_sample *sample, |
2941 | struct symbol **parent, | |
2942 | struct addr_location *root_al, | |
2943 | int max_stack) | |
2944 | { | |
2945 | int ret = 0; | |
2946 | ||
914eb9ca | 2947 | callchain_cursor_reset(cursor); |
9919a65e CP |
2948 | |
2949 | if (callchain_param.order == ORDER_CALLEE) { | |
2950 | ret = thread__resolve_callchain_sample(thread, cursor, | |
2951 | evsel, sample, | |
2952 | parent, root_al, | |
2953 | max_stack); | |
2954 | if (ret) | |
2955 | return ret; | |
2956 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
2957 | evsel, sample, | |
2958 | max_stack); | |
2959 | } else { | |
2960 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
2961 | evsel, sample, | |
2962 | max_stack); | |
2963 | if (ret) | |
2964 | return ret; | |
2965 | ret = thread__resolve_callchain_sample(thread, cursor, | |
2966 | evsel, sample, | |
2967 | parent, root_al, | |
2968 | max_stack); | |
2969 | } | |
2970 | ||
2971 | return ret; | |
3f067dca | 2972 | } |
35feee19 DA |
2973 | |
2974 | int machine__for_each_thread(struct machine *machine, | |
2975 | int (*fn)(struct thread *thread, void *p), | |
2976 | void *priv) | |
2977 | { | |
91e467bc | 2978 | struct threads *threads; |
35feee19 DA |
2979 | struct rb_node *nd; |
2980 | struct thread *thread; | |
2981 | int rc = 0; | |
91e467bc | 2982 | int i; |
35feee19 | 2983 | |
91e467bc KL |
2984 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
2985 | threads = &machine->threads[i]; | |
f3acb3a8 DB |
2986 | for (nd = rb_first_cached(&threads->entries); nd; |
2987 | nd = rb_next(nd)) { | |
91e467bc KL |
2988 | thread = rb_entry(nd, struct thread, rb_node); |
2989 | rc = fn(thread, priv); | |
2990 | if (rc != 0) | |
2991 | return rc; | |
2992 | } | |
35feee19 | 2993 | |
91e467bc KL |
2994 | list_for_each_entry(thread, &threads->dead, node) { |
2995 | rc = fn(thread, priv); | |
2996 | if (rc != 0) | |
2997 | return rc; | |
2998 | } | |
35feee19 DA |
2999 | } |
3000 | return rc; | |
3001 | } | |
58d925dc | 3002 | |
a5499b37 AH |
3003 | int machines__for_each_thread(struct machines *machines, |
3004 | int (*fn)(struct thread *thread, void *p), | |
3005 | void *priv) | |
3006 | { | |
3007 | struct rb_node *nd; | |
3008 | int rc = 0; | |
3009 | ||
3010 | rc = machine__for_each_thread(&machines->host, fn, priv); | |
3011 | if (rc != 0) | |
3012 | return rc; | |
3013 | ||
f3acb3a8 | 3014 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
a5499b37 AH |
3015 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
3016 | ||
3017 | rc = machine__for_each_thread(machine, fn, priv); | |
3018 | if (rc != 0) | |
3019 | return rc; | |
3020 | } | |
3021 | return rc; | |
3022 | } | |
3023 | ||
b9d266ba AH |
3024 | pid_t machine__get_current_tid(struct machine *machine, int cpu) |
3025 | { | |
5501e922 | 3026 | int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS); |
8c727469 KM |
3027 | |
3028 | if (cpu < 0 || cpu >= nr_cpus || !machine->current_tid) | |
b9d266ba AH |
3029 | return -1; |
3030 | ||
3031 | return machine->current_tid[cpu]; | |
3032 | } | |
3033 | ||
3034 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
3035 | pid_t tid) | |
3036 | { | |
3037 | struct thread *thread; | |
5501e922 | 3038 | int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS); |
b9d266ba AH |
3039 | |
3040 | if (cpu < 0) | |
3041 | return -EINVAL; | |
3042 | ||
3043 | if (!machine->current_tid) { | |
3044 | int i; | |
3045 | ||
8c727469 | 3046 | machine->current_tid = calloc(nr_cpus, sizeof(pid_t)); |
b9d266ba AH |
3047 | if (!machine->current_tid) |
3048 | return -ENOMEM; | |
8c727469 | 3049 | for (i = 0; i < nr_cpus; i++) |
b9d266ba AH |
3050 | machine->current_tid[i] = -1; |
3051 | } | |
3052 | ||
8c727469 | 3053 | if (cpu >= nr_cpus) { |
b9d266ba AH |
3054 | pr_err("Requested CPU %d too large. ", cpu); |
3055 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
3056 | return -EINVAL; | |
3057 | } | |
3058 | ||
3059 | machine->current_tid[cpu] = tid; | |
3060 | ||
3061 | thread = machine__findnew_thread(machine, pid, tid); | |
3062 | if (!thread) | |
3063 | return -ENOMEM; | |
3064 | ||
3065 | thread->cpu = cpu; | |
b91fc39f | 3066 | thread__put(thread); |
b9d266ba AH |
3067 | |
3068 | return 0; | |
3069 | } | |
fbe2af45 | 3070 | |
dbbd34a6 AH |
3071 | /* |
3072 | * Compares the raw arch string. N.B. see instead perf_env__arch() if a | |
3073 | * normalized arch is needed. | |
3074 | */ | |
3075 | bool machine__is(struct machine *machine, const char *arch) | |
3076 | { | |
3077 | return machine && !strcmp(perf_env__raw_arch(machine->env), arch); | |
3078 | } | |
3079 | ||
9cecca32 AH |
3080 | int machine__nr_cpus_avail(struct machine *machine) |
3081 | { | |
3082 | return machine ? perf_env__nr_cpus_avail(machine->env) : 0; | |
3083 | } | |
3084 | ||
fbe2af45 AH |
3085 | int machine__get_kernel_start(struct machine *machine) |
3086 | { | |
a5e813c6 | 3087 | struct map *map = machine__kernel_map(machine); |
fbe2af45 AH |
3088 | int err = 0; |
3089 | ||
3090 | /* | |
3091 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
3092 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
3093 | * all addresses including kernel addresses are less than 2^32. In | |
3094 | * that case (32-bit system), if the kernel mapping is unknown, all | |
3095 | * addresses will be assumed to be in user space - see | |
3096 | * machine__kernel_ip(). | |
3097 | */ | |
3098 | machine->kernel_start = 1ULL << 63; | |
3099 | if (map) { | |
be39db9f | 3100 | err = map__load(map); |
19422a9f AH |
3101 | /* |
3102 | * On x86_64, PTI entry trampolines are less than the | |
3103 | * start of kernel text, but still above 2^63. So leave | |
3104 | * kernel_start = 1ULL << 63 for x86_64. | |
3105 | */ | |
3106 | if (!err && !machine__is(machine, "x86_64")) | |
fbe2af45 AH |
3107 | machine->kernel_start = map->start; |
3108 | } | |
3109 | return err; | |
3110 | } | |
aa7cc2ae | 3111 | |
8e80ad99 AH |
3112 | u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr) |
3113 | { | |
3114 | u8 addr_cpumode = cpumode; | |
3115 | bool kernel_ip; | |
3116 | ||
3117 | if (!machine->single_address_space) | |
3118 | goto out; | |
3119 | ||
3120 | kernel_ip = machine__kernel_ip(machine, addr); | |
3121 | switch (cpumode) { | |
3122 | case PERF_RECORD_MISC_KERNEL: | |
3123 | case PERF_RECORD_MISC_USER: | |
3124 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_KERNEL : | |
3125 | PERF_RECORD_MISC_USER; | |
3126 | break; | |
3127 | case PERF_RECORD_MISC_GUEST_KERNEL: | |
3128 | case PERF_RECORD_MISC_GUEST_USER: | |
3129 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_GUEST_KERNEL : | |
3130 | PERF_RECORD_MISC_GUEST_USER; | |
3131 | break; | |
3132 | default: | |
3133 | break; | |
3134 | } | |
3135 | out: | |
3136 | return addr_cpumode; | |
3137 | } | |
3138 | ||
0e3149f8 ACM |
3139 | struct dso *machine__findnew_dso_id(struct machine *machine, const char *filename, struct dso_id *id) |
3140 | { | |
3141 | return dsos__findnew_id(&machine->dsos, filename, id); | |
3142 | } | |
3143 | ||
aa7cc2ae ACM |
3144 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) |
3145 | { | |
0e3149f8 | 3146 | return machine__findnew_dso_id(machine, filename, NULL); |
aa7cc2ae | 3147 | } |
c3168b0d ACM |
3148 | |
3149 | char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) | |
3150 | { | |
3151 | struct machine *machine = vmachine; | |
3152 | struct map *map; | |
107cad95 | 3153 | struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map); |
c3168b0d ACM |
3154 | |
3155 | if (sym == NULL) | |
3156 | return NULL; | |
3157 | ||
3158 | *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL; | |
3159 | *addrp = map->unmap_ip(map, sym->start); | |
3160 | return sym->name; | |
3161 | } | |
c57f5eaa JO |
3162 | |
3163 | int machine__for_each_dso(struct machine *machine, machine__dso_t fn, void *priv) | |
3164 | { | |
3165 | struct dso *pos; | |
3166 | int err = 0; | |
3167 | ||
3168 | list_for_each_entry(pos, &machine->dsos.head, node) { | |
3169 | if (fn(pos, machine, priv)) | |
3170 | err = -1; | |
3171 | } | |
3172 | return err; | |
3173 | } |