Commit | Line | Data |
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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" |
b9f6fbb3 | 37 | #include "arm64-frame-pointer-unwind-support.h" |
9d2f8e22 | 38 | |
3052ba56 | 39 | #include <linux/ctype.h> |
3d689ed6 | 40 | #include <symbol/kallsyms.h> |
0f476f2b | 41 | #include <linux/mman.h> |
8520a98d | 42 | #include <linux/string.h> |
7f7c536f | 43 | #include <linux/zalloc.h> |
3d689ed6 | 44 | |
b91fc39f ACM |
45 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock); |
46 | ||
93730f85 ACM |
47 | static struct dso *machine__kernel_dso(struct machine *machine) |
48 | { | |
49 | return machine->vmlinux_map->dso; | |
50 | } | |
51 | ||
e167f995 ACM |
52 | static void dsos__init(struct dsos *dsos) |
53 | { | |
54 | INIT_LIST_HEAD(&dsos->head); | |
55 | dsos->root = RB_ROOT; | |
0a7c74ea | 56 | init_rwsem(&dsos->lock); |
e167f995 ACM |
57 | } |
58 | ||
91e467bc KL |
59 | static void machine__threads_init(struct machine *machine) |
60 | { | |
61 | int i; | |
62 | ||
63 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
64 | struct threads *threads = &machine->threads[i]; | |
f3acb3a8 | 65 | threads->entries = RB_ROOT_CACHED; |
0a7c74ea | 66 | init_rwsem(&threads->lock); |
91e467bc KL |
67 | threads->nr = 0; |
68 | INIT_LIST_HEAD(&threads->dead); | |
69 | threads->last_match = NULL; | |
70 | } | |
71 | } | |
72 | ||
8c7f1bb3 JO |
73 | static int machine__set_mmap_name(struct machine *machine) |
74 | { | |
c192524e JO |
75 | if (machine__is_host(machine)) |
76 | machine->mmap_name = strdup("[kernel.kallsyms]"); | |
77 | else if (machine__is_default_guest(machine)) | |
78 | machine->mmap_name = strdup("[guest.kernel.kallsyms]"); | |
79 | else if (asprintf(&machine->mmap_name, "[guest.kernel.kallsyms.%d]", | |
80 | machine->pid) < 0) | |
81 | machine->mmap_name = NULL; | |
8c7f1bb3 JO |
82 | |
83 | return machine->mmap_name ? 0 : -ENOMEM; | |
84 | } | |
85 | ||
69d2591a ACM |
86 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
87 | { | |
81f981d7 JO |
88 | int err = -ENOMEM; |
89 | ||
93b0ba3c | 90 | memset(machine, 0, sizeof(*machine)); |
79b6bb73 | 91 | maps__init(&machine->kmaps, machine); |
69d2591a | 92 | RB_CLEAR_NODE(&machine->rb_node); |
3d39ac53 | 93 | dsos__init(&machine->dsos); |
69d2591a | 94 | |
91e467bc | 95 | machine__threads_init(machine); |
69d2591a | 96 | |
d027b640 | 97 | machine->vdso_info = NULL; |
4cde998d | 98 | machine->env = NULL; |
d027b640 | 99 | |
69d2591a ACM |
100 | machine->pid = pid; |
101 | ||
14bd6d20 | 102 | machine->id_hdr_size = 0; |
caf8a0d0 | 103 | machine->kptr_restrict_warned = false; |
cfe1c414 | 104 | machine->comm_exec = false; |
fbe2af45 | 105 | machine->kernel_start = 0; |
3183f8ca | 106 | machine->vmlinux_map = NULL; |
cc1121ab | 107 | |
69d2591a ACM |
108 | machine->root_dir = strdup(root_dir); |
109 | if (machine->root_dir == NULL) | |
110 | return -ENOMEM; | |
111 | ||
8c7f1bb3 JO |
112 | if (machine__set_mmap_name(machine)) |
113 | goto out; | |
114 | ||
69d2591a | 115 | if (pid != HOST_KERNEL_ID) { |
1fcb8768 | 116 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 117 | pid); |
69d2591a ACM |
118 | char comm[64]; |
119 | ||
120 | if (thread == NULL) | |
81f981d7 | 121 | goto out; |
69d2591a ACM |
122 | |
123 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 124 | thread__set_comm(thread, comm, 0); |
b91fc39f | 125 | thread__put(thread); |
69d2591a ACM |
126 | } |
127 | ||
b9d266ba | 128 | machine->current_tid = NULL; |
81f981d7 | 129 | err = 0; |
b9d266ba | 130 | |
81f981d7 | 131 | out: |
8c7f1bb3 | 132 | if (err) { |
81f981d7 | 133 | zfree(&machine->root_dir); |
8c7f1bb3 JO |
134 | zfree(&machine->mmap_name); |
135 | } | |
69d2591a ACM |
136 | return 0; |
137 | } | |
138 | ||
8fb598e5 DA |
139 | struct machine *machine__new_host(void) |
140 | { | |
141 | struct machine *machine = malloc(sizeof(*machine)); | |
142 | ||
143 | if (machine != NULL) { | |
144 | machine__init(machine, "", HOST_KERNEL_ID); | |
145 | ||
146 | if (machine__create_kernel_maps(machine) < 0) | |
147 | goto out_delete; | |
148 | } | |
149 | ||
150 | return machine; | |
151 | out_delete: | |
152 | free(machine); | |
153 | return NULL; | |
154 | } | |
155 | ||
7d132caa ACM |
156 | struct machine *machine__new_kallsyms(void) |
157 | { | |
158 | struct machine *machine = machine__new_host(); | |
159 | /* | |
160 | * FIXME: | |
adba1634 | 161 | * 1) We should switch to machine__load_kallsyms(), i.e. not explicitly |
7d132caa ACM |
162 | * ask for not using the kcore parsing code, once this one is fixed |
163 | * to create a map per module. | |
164 | */ | |
329f0ade | 165 | if (machine && machine__load_kallsyms(machine, "/proc/kallsyms") <= 0) { |
7d132caa ACM |
166 | machine__delete(machine); |
167 | machine = NULL; | |
168 | } | |
169 | ||
170 | return machine; | |
171 | } | |
172 | ||
d3a7c489 | 173 | static void dsos__purge(struct dsos *dsos) |
69d2591a ACM |
174 | { |
175 | struct dso *pos, *n; | |
176 | ||
0a7c74ea | 177 | down_write(&dsos->lock); |
e8807844 | 178 | |
8fa7d87f | 179 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 180 | RB_CLEAR_NODE(&pos->rb_node); |
e266a753 | 181 | pos->root = NULL; |
d3a7c489 ACM |
182 | list_del_init(&pos->node); |
183 | dso__put(pos); | |
69d2591a | 184 | } |
e8807844 | 185 | |
0a7c74ea | 186 | up_write(&dsos->lock); |
d3a7c489 | 187 | } |
e8807844 | 188 | |
d3a7c489 ACM |
189 | static void dsos__exit(struct dsos *dsos) |
190 | { | |
191 | dsos__purge(dsos); | |
0a7c74ea | 192 | exit_rwsem(&dsos->lock); |
69d2591a ACM |
193 | } |
194 | ||
3f067dca ACM |
195 | void machine__delete_threads(struct machine *machine) |
196 | { | |
b91fc39f | 197 | struct rb_node *nd; |
91e467bc | 198 | int i; |
3f067dca | 199 | |
91e467bc KL |
200 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
201 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea | 202 | down_write(&threads->lock); |
f3acb3a8 | 203 | nd = rb_first_cached(&threads->entries); |
91e467bc KL |
204 | while (nd) { |
205 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
3f067dca | 206 | |
91e467bc KL |
207 | nd = rb_next(nd); |
208 | __machine__remove_thread(machine, t, false); | |
209 | } | |
0a7c74ea | 210 | up_write(&threads->lock); |
3f067dca ACM |
211 | } |
212 | } | |
213 | ||
69d2591a ACM |
214 | void machine__exit(struct machine *machine) |
215 | { | |
91e467bc KL |
216 | int i; |
217 | ||
19993b82 ACM |
218 | if (machine == NULL) |
219 | return; | |
220 | ||
ebe9729c | 221 | machine__destroy_kernel_maps(machine); |
79b6bb73 | 222 | maps__exit(&machine->kmaps); |
e8807844 | 223 | dsos__exit(&machine->dsos); |
9a4388c7 | 224 | machine__exit_vdso(machine); |
04662523 | 225 | zfree(&machine->root_dir); |
8c7f1bb3 | 226 | zfree(&machine->mmap_name); |
b9d266ba | 227 | zfree(&machine->current_tid); |
91e467bc KL |
228 | |
229 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { | |
230 | struct threads *threads = &machine->threads[i]; | |
4c00af0e ACM |
231 | struct thread *thread, *n; |
232 | /* | |
233 | * Forget about the dead, at this point whatever threads were | |
234 | * left in the dead lists better have a reference count taken | |
235 | * by who is using them, and then, when they drop those references | |
236 | * and it finally hits zero, thread__put() will check and see that | |
237 | * its not in the dead threads list and will not try to remove it | |
238 | * from there, just calling thread__delete() straight away. | |
239 | */ | |
240 | list_for_each_entry_safe(thread, n, &threads->dead, node) | |
241 | list_del_init(&thread->node); | |
242 | ||
0a7c74ea | 243 | exit_rwsem(&threads->lock); |
91e467bc | 244 | } |
69d2591a ACM |
245 | } |
246 | ||
247 | void machine__delete(struct machine *machine) | |
248 | { | |
32ca678d ACM |
249 | if (machine) { |
250 | machine__exit(machine); | |
251 | free(machine); | |
252 | } | |
69d2591a ACM |
253 | } |
254 | ||
876650e6 ACM |
255 | void machines__init(struct machines *machines) |
256 | { | |
257 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
f3acb3a8 | 258 | machines->guests = RB_ROOT_CACHED; |
876650e6 ACM |
259 | } |
260 | ||
261 | void machines__exit(struct machines *machines) | |
262 | { | |
263 | machine__exit(&machines->host); | |
264 | /* XXX exit guest */ | |
265 | } | |
266 | ||
267 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
268 | const char *root_dir) |
269 | { | |
f3acb3a8 | 270 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
271 | struct rb_node *parent = NULL; |
272 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
f3acb3a8 | 273 | bool leftmost = true; |
69d2591a ACM |
274 | |
275 | if (machine == NULL) | |
276 | return NULL; | |
277 | ||
278 | if (machine__init(machine, root_dir, pid) != 0) { | |
279 | free(machine); | |
280 | return NULL; | |
281 | } | |
282 | ||
283 | while (*p != NULL) { | |
284 | parent = *p; | |
285 | pos = rb_entry(parent, struct machine, rb_node); | |
286 | if (pid < pos->pid) | |
287 | p = &(*p)->rb_left; | |
f3acb3a8 | 288 | else { |
69d2591a | 289 | p = &(*p)->rb_right; |
f3acb3a8 DB |
290 | leftmost = false; |
291 | } | |
69d2591a ACM |
292 | } |
293 | ||
294 | rb_link_node(&machine->rb_node, parent, p); | |
f3acb3a8 | 295 | rb_insert_color_cached(&machine->rb_node, &machines->guests, leftmost); |
69d2591a ACM |
296 | |
297 | return machine; | |
298 | } | |
299 | ||
cfe1c414 AH |
300 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
301 | { | |
302 | struct rb_node *nd; | |
303 | ||
304 | machines->host.comm_exec = comm_exec; | |
305 | ||
f3acb3a8 | 306 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
cfe1c414 AH |
307 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
308 | ||
309 | machine->comm_exec = comm_exec; | |
310 | } | |
311 | } | |
312 | ||
876650e6 | 313 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 314 | { |
f3acb3a8 | 315 | struct rb_node **p = &machines->guests.rb_root.rb_node; |
69d2591a ACM |
316 | struct rb_node *parent = NULL; |
317 | struct machine *machine; | |
318 | struct machine *default_machine = NULL; | |
319 | ||
876650e6 ACM |
320 | if (pid == HOST_KERNEL_ID) |
321 | return &machines->host; | |
322 | ||
69d2591a ACM |
323 | while (*p != NULL) { |
324 | parent = *p; | |
325 | machine = rb_entry(parent, struct machine, rb_node); | |
326 | if (pid < machine->pid) | |
327 | p = &(*p)->rb_left; | |
328 | else if (pid > machine->pid) | |
329 | p = &(*p)->rb_right; | |
330 | else | |
331 | return machine; | |
332 | if (!machine->pid) | |
333 | default_machine = machine; | |
334 | } | |
335 | ||
336 | return default_machine; | |
337 | } | |
338 | ||
876650e6 | 339 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
340 | { |
341 | char path[PATH_MAX]; | |
342 | const char *root_dir = ""; | |
343 | struct machine *machine = machines__find(machines, pid); | |
344 | ||
345 | if (machine && (machine->pid == pid)) | |
346 | goto out; | |
347 | ||
348 | if ((pid != HOST_KERNEL_ID) && | |
349 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
350 | (symbol_conf.guestmount)) { | |
351 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
352 | if (access(path, R_OK)) { | |
353 | static struct strlist *seen; | |
354 | ||
355 | if (!seen) | |
4a77e218 | 356 | seen = strlist__new(NULL, NULL); |
69d2591a ACM |
357 | |
358 | if (!strlist__has_entry(seen, path)) { | |
359 | pr_err("Can't access file %s\n", path); | |
360 | strlist__add(seen, path); | |
361 | } | |
362 | machine = NULL; | |
363 | goto out; | |
364 | } | |
365 | root_dir = path; | |
366 | } | |
367 | ||
368 | machine = machines__add(machines, pid, root_dir); | |
369 | out: | |
370 | return machine; | |
371 | } | |
372 | ||
fcda5ff7 AH |
373 | struct machine *machines__find_guest(struct machines *machines, pid_t pid) |
374 | { | |
375 | struct machine *machine = machines__find(machines, pid); | |
376 | ||
377 | if (!machine) | |
378 | machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID); | |
379 | return machine; | |
380 | } | |
381 | ||
876650e6 ACM |
382 | void machines__process_guests(struct machines *machines, |
383 | machine__process_t process, void *data) | |
69d2591a ACM |
384 | { |
385 | struct rb_node *nd; | |
386 | ||
f3acb3a8 | 387 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
388 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
389 | process(pos, data); | |
390 | } | |
391 | } | |
392 | ||
876650e6 | 393 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
394 | { |
395 | struct rb_node *node; | |
396 | struct machine *machine; | |
397 | ||
876650e6 ACM |
398 | machines->host.id_hdr_size = id_hdr_size; |
399 | ||
f3acb3a8 DB |
400 | for (node = rb_first_cached(&machines->guests); node; |
401 | node = rb_next(node)) { | |
69d2591a ACM |
402 | machine = rb_entry(node, struct machine, rb_node); |
403 | machine->id_hdr_size = id_hdr_size; | |
404 | } | |
405 | ||
406 | return; | |
407 | } | |
408 | ||
29ce3612 AH |
409 | static void machine__update_thread_pid(struct machine *machine, |
410 | struct thread *th, pid_t pid) | |
411 | { | |
412 | struct thread *leader; | |
413 | ||
414 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
415 | return; | |
416 | ||
417 | th->pid_ = pid; | |
418 | ||
419 | if (th->pid_ == th->tid) | |
420 | return; | |
421 | ||
b91fc39f | 422 | leader = __machine__findnew_thread(machine, th->pid_, th->pid_); |
29ce3612 AH |
423 | if (!leader) |
424 | goto out_err; | |
425 | ||
fe87797d ACM |
426 | if (!leader->maps) |
427 | leader->maps = maps__new(machine); | |
29ce3612 | 428 | |
fe87797d | 429 | if (!leader->maps) |
29ce3612 AH |
430 | goto out_err; |
431 | ||
fe87797d | 432 | if (th->maps == leader->maps) |
29ce3612 AH |
433 | return; |
434 | ||
fe87797d | 435 | if (th->maps) { |
29ce3612 AH |
436 | /* |
437 | * Maps are created from MMAP events which provide the pid and | |
438 | * tid. Consequently there never should be any maps on a thread | |
439 | * with an unknown pid. Just print an error if there are. | |
440 | */ | |
fe87797d | 441 | if (!maps__empty(th->maps)) |
29ce3612 AH |
442 | pr_err("Discarding thread maps for %d:%d\n", |
443 | th->pid_, th->tid); | |
fe87797d | 444 | maps__put(th->maps); |
29ce3612 AH |
445 | } |
446 | ||
fe87797d | 447 | th->maps = maps__get(leader->maps); |
abd82868 ACM |
448 | out_put: |
449 | thread__put(leader); | |
29ce3612 | 450 | return; |
29ce3612 AH |
451 | out_err: |
452 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
abd82868 | 453 | goto out_put; |
29ce3612 AH |
454 | } |
455 | ||
abd82868 | 456 | /* |
f8b2ebb5 JO |
457 | * Front-end cache - TID lookups come in blocks, |
458 | * so most of the time we dont have to look up | |
459 | * the full rbtree: | |
abd82868 | 460 | */ |
f8b2ebb5 | 461 | static struct thread* |
b57334b9 JO |
462 | __threads__get_last_match(struct threads *threads, struct machine *machine, |
463 | int pid, int tid) | |
9d2f8e22 | 464 | { |
9d2f8e22 ACM |
465 | struct thread *th; |
466 | ||
91e467bc | 467 | th = threads->last_match; |
f3b623b8 ACM |
468 | if (th != NULL) { |
469 | if (th->tid == tid) { | |
470 | machine__update_thread_pid(machine, th, pid); | |
abd82868 | 471 | return thread__get(th); |
f3b623b8 ACM |
472 | } |
473 | ||
91e467bc | 474 | threads->last_match = NULL; |
99d725fc | 475 | } |
9d2f8e22 | 476 | |
f8b2ebb5 JO |
477 | return NULL; |
478 | } | |
479 | ||
b57334b9 JO |
480 | static struct thread* |
481 | threads__get_last_match(struct threads *threads, struct machine *machine, | |
482 | int pid, int tid) | |
483 | { | |
484 | struct thread *th = NULL; | |
485 | ||
486 | if (perf_singlethreaded) | |
487 | th = __threads__get_last_match(threads, machine, pid, tid); | |
488 | ||
489 | return th; | |
490 | } | |
491 | ||
67fda0f3 | 492 | static void |
b57334b9 | 493 | __threads__set_last_match(struct threads *threads, struct thread *th) |
67fda0f3 JO |
494 | { |
495 | threads->last_match = th; | |
496 | } | |
497 | ||
b57334b9 JO |
498 | static void |
499 | threads__set_last_match(struct threads *threads, struct thread *th) | |
500 | { | |
501 | if (perf_singlethreaded) | |
502 | __threads__set_last_match(threads, th); | |
503 | } | |
504 | ||
f8b2ebb5 JO |
505 | /* |
506 | * Caller must eventually drop thread->refcnt returned with a successful | |
507 | * lookup/new thread inserted. | |
508 | */ | |
509 | static struct thread *____machine__findnew_thread(struct machine *machine, | |
510 | struct threads *threads, | |
511 | pid_t pid, pid_t tid, | |
512 | bool create) | |
513 | { | |
f3acb3a8 | 514 | struct rb_node **p = &threads->entries.rb_root.rb_node; |
f8b2ebb5 JO |
515 | struct rb_node *parent = NULL; |
516 | struct thread *th; | |
f3acb3a8 | 517 | bool leftmost = true; |
f8b2ebb5 JO |
518 | |
519 | th = threads__get_last_match(threads, machine, pid, tid); | |
520 | if (th) | |
521 | return th; | |
522 | ||
9d2f8e22 ACM |
523 | while (*p != NULL) { |
524 | parent = *p; | |
525 | th = rb_entry(parent, struct thread, rb_node); | |
526 | ||
38051234 | 527 | if (th->tid == tid) { |
67fda0f3 | 528 | threads__set_last_match(threads, th); |
29ce3612 | 529 | machine__update_thread_pid(machine, th, pid); |
abd82868 | 530 | return thread__get(th); |
9d2f8e22 ACM |
531 | } |
532 | ||
38051234 | 533 | if (tid < th->tid) |
9d2f8e22 | 534 | p = &(*p)->rb_left; |
f3acb3a8 | 535 | else { |
9d2f8e22 | 536 | p = &(*p)->rb_right; |
f3acb3a8 DB |
537 | leftmost = false; |
538 | } | |
9d2f8e22 ACM |
539 | } |
540 | ||
541 | if (!create) | |
542 | return NULL; | |
543 | ||
99d725fc | 544 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
545 | if (th != NULL) { |
546 | rb_link_node(&th->rb_node, parent, p); | |
f3acb3a8 | 547 | rb_insert_color_cached(&th->rb_node, &threads->entries, leftmost); |
cddcef60 JO |
548 | |
549 | /* | |
79b6bb73 | 550 | * We have to initialize maps separately after rb tree is updated. |
cddcef60 JO |
551 | * |
552 | * The reason is that we call machine__findnew_thread | |
79b6bb73 | 553 | * within thread__init_maps to find the thread |
cddcef60 JO |
554 | * leader and that would screwed the rb tree. |
555 | */ | |
79b6bb73 | 556 | if (thread__init_maps(th, machine)) { |
f3acb3a8 | 557 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 558 | RB_CLEAR_NODE(&th->rb_node); |
abd82868 | 559 | thread__put(th); |
cddcef60 | 560 | return NULL; |
418029b7 | 561 | } |
f3b623b8 ACM |
562 | /* |
563 | * It is now in the rbtree, get a ref | |
564 | */ | |
565 | thread__get(th); | |
67fda0f3 | 566 | threads__set_last_match(threads, th); |
91e467bc | 567 | ++threads->nr; |
9d2f8e22 ACM |
568 | } |
569 | ||
570 | return th; | |
571 | } | |
572 | ||
b91fc39f ACM |
573 | struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid) |
574 | { | |
75e45e43 | 575 | return ____machine__findnew_thread(machine, machine__threads(machine, tid), pid, tid, true); |
b91fc39f ACM |
576 | } |
577 | ||
314add6b AH |
578 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
579 | pid_t tid) | |
9d2f8e22 | 580 | { |
91e467bc | 581 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f ACM |
582 | struct thread *th; |
583 | ||
0a7c74ea | 584 | down_write(&threads->lock); |
abd82868 | 585 | th = __machine__findnew_thread(machine, pid, tid); |
0a7c74ea | 586 | up_write(&threads->lock); |
b91fc39f | 587 | return th; |
9d2f8e22 ACM |
588 | } |
589 | ||
d75e6097 JO |
590 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
591 | pid_t tid) | |
9d2f8e22 | 592 | { |
91e467bc | 593 | struct threads *threads = machine__threads(machine, tid); |
b91fc39f | 594 | struct thread *th; |
91e467bc | 595 | |
0a7c74ea | 596 | down_read(&threads->lock); |
75e45e43 | 597 | th = ____machine__findnew_thread(machine, threads, pid, tid, false); |
0a7c74ea | 598 | up_read(&threads->lock); |
b91fc39f | 599 | return th; |
9d2f8e22 | 600 | } |
b0a7d1a0 | 601 | |
3035cb6c AH |
602 | /* |
603 | * Threads are identified by pid and tid, and the idle task has pid == tid == 0. | |
604 | * So here a single thread is created for that, but actually there is a separate | |
605 | * idle task per cpu, so there should be one 'struct thread' per cpu, but there | |
606 | * is only 1. That causes problems for some tools, requiring workarounds. For | |
607 | * example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu(). | |
608 | */ | |
609 | struct thread *machine__idle_thread(struct machine *machine) | |
610 | { | |
611 | struct thread *thread = machine__findnew_thread(machine, 0, 0); | |
612 | ||
613 | if (!thread || thread__set_comm(thread, "swapper", 0) || | |
614 | thread__set_namespaces(thread, 0, NULL)) | |
615 | pr_err("problem inserting idle task for machine pid %d\n", machine->pid); | |
616 | ||
617 | return thread; | |
618 | } | |
619 | ||
cfe1c414 AH |
620 | struct comm *machine__thread_exec_comm(struct machine *machine, |
621 | struct thread *thread) | |
622 | { | |
623 | if (machine->comm_exec) | |
624 | return thread__exec_comm(thread); | |
625 | else | |
626 | return thread__comm(thread); | |
627 | } | |
628 | ||
162f0bef FW |
629 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
630 | struct perf_sample *sample) | |
b0a7d1a0 | 631 | { |
314add6b AH |
632 | struct thread *thread = machine__findnew_thread(machine, |
633 | event->comm.pid, | |
634 | event->comm.tid); | |
65de51f9 | 635 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b91fc39f | 636 | int err = 0; |
b0a7d1a0 | 637 | |
cfe1c414 AH |
638 | if (exec) |
639 | machine->comm_exec = true; | |
640 | ||
b0a7d1a0 ACM |
641 | if (dump_trace) |
642 | perf_event__fprintf_comm(event, stdout); | |
643 | ||
65de51f9 AH |
644 | if (thread == NULL || |
645 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 | 646 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
b91fc39f | 647 | err = -1; |
b0a7d1a0 ACM |
648 | } |
649 | ||
b91fc39f ACM |
650 | thread__put(thread); |
651 | ||
652 | return err; | |
b0a7d1a0 ACM |
653 | } |
654 | ||
f3b3614a HB |
655 | int machine__process_namespaces_event(struct machine *machine __maybe_unused, |
656 | union perf_event *event, | |
657 | struct perf_sample *sample __maybe_unused) | |
658 | { | |
659 | struct thread *thread = machine__findnew_thread(machine, | |
660 | event->namespaces.pid, | |
661 | event->namespaces.tid); | |
662 | int err = 0; | |
663 | ||
664 | WARN_ONCE(event->namespaces.nr_namespaces > NR_NAMESPACES, | |
665 | "\nWARNING: kernel seems to support more namespaces than perf" | |
666 | " tool.\nTry updating the perf tool..\n\n"); | |
667 | ||
668 | WARN_ONCE(event->namespaces.nr_namespaces < NR_NAMESPACES, | |
669 | "\nWARNING: perf tool seems to support more namespaces than" | |
670 | " the kernel.\nTry updating the kernel..\n\n"); | |
671 | ||
672 | if (dump_trace) | |
673 | perf_event__fprintf_namespaces(event, stdout); | |
674 | ||
675 | if (thread == NULL || | |
676 | thread__set_namespaces(thread, sample->time, &event->namespaces)) { | |
677 | dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n"); | |
678 | err = -1; | |
679 | } | |
680 | ||
681 | thread__put(thread); | |
682 | ||
683 | return err; | |
684 | } | |
685 | ||
d1277aa3 | 686 | int machine__process_cgroup_event(struct machine *machine, |
ba78c1c5 NK |
687 | union perf_event *event, |
688 | struct perf_sample *sample __maybe_unused) | |
689 | { | |
d1277aa3 NK |
690 | struct cgroup *cgrp; |
691 | ||
ba78c1c5 NK |
692 | if (dump_trace) |
693 | perf_event__fprintf_cgroup(event, stdout); | |
694 | ||
d1277aa3 NK |
695 | cgrp = cgroup__findnew(machine->env, event->cgroup.id, event->cgroup.path); |
696 | if (cgrp == NULL) | |
697 | return -ENOMEM; | |
698 | ||
ba78c1c5 NK |
699 | return 0; |
700 | } | |
701 | ||
b0a7d1a0 | 702 | int machine__process_lost_event(struct machine *machine __maybe_unused, |
162f0bef | 703 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 | 704 | { |
5290ed69 | 705 | dump_printf(": id:%" PRI_lu64 ": lost:%" PRI_lu64 "\n", |
b0a7d1a0 ACM |
706 | event->lost.id, event->lost.lost); |
707 | return 0; | |
708 | } | |
709 | ||
c4937a91 KL |
710 | int machine__process_lost_samples_event(struct machine *machine __maybe_unused, |
711 | union perf_event *event, struct perf_sample *sample) | |
712 | { | |
a2e254d8 | 713 | dump_printf(": id:%" PRIu64 ": lost samples :%" PRI_lu64 "\n", |
c4937a91 KL |
714 | sample->id, event->lost_samples.lost); |
715 | return 0; | |
716 | } | |
717 | ||
9f2de315 ACM |
718 | static struct dso *machine__findnew_module_dso(struct machine *machine, |
719 | struct kmod_path *m, | |
720 | const char *filename) | |
da17ea33 JO |
721 | { |
722 | struct dso *dso; | |
da17ea33 | 723 | |
0a7c74ea | 724 | down_write(&machine->dsos.lock); |
e8807844 ACM |
725 | |
726 | dso = __dsos__find(&machine->dsos, m->name, true); | |
da17ea33 | 727 | if (!dso) { |
e8807844 | 728 | dso = __dsos__addnew(&machine->dsos, m->name); |
da17ea33 | 729 | if (dso == NULL) |
e8807844 | 730 | goto out_unlock; |
da17ea33 | 731 | |
6b335e8f | 732 | dso__set_module_info(dso, m, machine); |
ca33380a | 733 | dso__set_long_name(dso, strdup(filename), true); |
1c695c88 | 734 | dso->kernel = DSO_SPACE__KERNEL; |
da17ea33 JO |
735 | } |
736 | ||
d3a7c489 | 737 | dso__get(dso); |
e8807844 | 738 | out_unlock: |
0a7c74ea | 739 | up_write(&machine->dsos.lock); |
da17ea33 JO |
740 | return dso; |
741 | } | |
742 | ||
4a96f7a0 AH |
743 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
744 | union perf_event *event) | |
745 | { | |
746 | if (dump_trace) | |
747 | perf_event__fprintf_aux(event, stdout); | |
748 | return 0; | |
749 | } | |
750 | ||
0ad21f68 AH |
751 | int machine__process_itrace_start_event(struct machine *machine __maybe_unused, |
752 | union perf_event *event) | |
753 | { | |
754 | if (dump_trace) | |
755 | perf_event__fprintf_itrace_start(event, stdout); | |
756 | return 0; | |
757 | } | |
758 | ||
61750473 AH |
759 | int machine__process_aux_output_hw_id_event(struct machine *machine __maybe_unused, |
760 | union perf_event *event) | |
761 | { | |
762 | if (dump_trace) | |
763 | perf_event__fprintf_aux_output_hw_id(event, stdout); | |
764 | return 0; | |
765 | } | |
766 | ||
0286039f AH |
767 | int machine__process_switch_event(struct machine *machine __maybe_unused, |
768 | union perf_event *event) | |
769 | { | |
770 | if (dump_trace) | |
771 | perf_event__fprintf_switch(event, stdout); | |
772 | return 0; | |
773 | } | |
774 | ||
9aa0bfa3 SL |
775 | static int machine__process_ksymbol_register(struct machine *machine, |
776 | union perf_event *event, | |
777 | struct perf_sample *sample __maybe_unused) | |
778 | { | |
779 | struct symbol *sym; | |
79b6bb73 | 780 | struct map *map = maps__find(&machine->kmaps, event->ksymbol.addr); |
9aa0bfa3 | 781 | |
9aa0bfa3 | 782 | if (!map) { |
4a4eb615 JO |
783 | struct dso *dso = dso__new(event->ksymbol.name); |
784 | ||
785 | if (dso) { | |
1c695c88 | 786 | dso->kernel = DSO_SPACE__KERNEL; |
4a4eb615 | 787 | map = map__new2(0, dso); |
c087e948 | 788 | dso__put(dso); |
4a4eb615 JO |
789 | } |
790 | ||
791 | if (!dso || !map) { | |
9aa0bfa3 | 792 | return -ENOMEM; |
4a4eb615 | 793 | } |
9aa0bfa3 | 794 | |
789e2419 AH |
795 | if (event->ksymbol.ksym_type == PERF_RECORD_KSYMBOL_TYPE_OOL) { |
796 | map->dso->binary_type = DSO_BINARY_TYPE__OOL; | |
797 | map->dso->data.file_size = event->ksymbol.len; | |
798 | dso__set_loaded(map->dso); | |
799 | } | |
800 | ||
ebdba16e ACM |
801 | map->start = event->ksymbol.addr; |
802 | map->end = map->start + event->ksymbol.len; | |
79b6bb73 | 803 | maps__insert(&machine->kmaps, map); |
c087e948 | 804 | map__put(map); |
7eddf7e7 | 805 | dso__set_loaded(dso); |
3c29d448 JO |
806 | |
807 | if (is_bpf_image(event->ksymbol.name)) { | |
808 | dso->binary_type = DSO_BINARY_TYPE__BPF_IMAGE; | |
809 | dso__set_long_name(dso, "", false); | |
810 | } | |
9aa0bfa3 SL |
811 | } |
812 | ||
8529f2e6 | 813 | sym = symbol__new(map->map_ip(map, map->start), |
ebdba16e ACM |
814 | event->ksymbol.len, |
815 | 0, 0, event->ksymbol.name); | |
9aa0bfa3 SL |
816 | if (!sym) |
817 | return -ENOMEM; | |
818 | dso__insert_symbol(map->dso, sym); | |
819 | return 0; | |
820 | } | |
821 | ||
822 | static int machine__process_ksymbol_unregister(struct machine *machine, | |
823 | union perf_event *event, | |
824 | struct perf_sample *sample __maybe_unused) | |
825 | { | |
ab8bf5f2 | 826 | struct symbol *sym; |
9aa0bfa3 SL |
827 | struct map *map; |
828 | ||
79b6bb73 | 829 | map = maps__find(&machine->kmaps, event->ksymbol.addr); |
ab8bf5f2 TR |
830 | if (!map) |
831 | return 0; | |
832 | ||
833 | if (map != machine->vmlinux_map) | |
79b6bb73 | 834 | maps__remove(&machine->kmaps, map); |
ab8bf5f2 TR |
835 | else { |
836 | sym = dso__find_symbol(map->dso, map->map_ip(map, map->start)); | |
837 | if (sym) | |
838 | dso__delete_symbol(map->dso, sym); | |
839 | } | |
9aa0bfa3 SL |
840 | |
841 | return 0; | |
842 | } | |
843 | ||
844 | int machine__process_ksymbol(struct machine *machine __maybe_unused, | |
845 | union perf_event *event, | |
846 | struct perf_sample *sample) | |
847 | { | |
848 | if (dump_trace) | |
849 | perf_event__fprintf_ksymbol(event, stdout); | |
850 | ||
ebdba16e | 851 | if (event->ksymbol.flags & PERF_RECORD_KSYMBOL_FLAGS_UNREGISTER) |
9aa0bfa3 SL |
852 | return machine__process_ksymbol_unregister(machine, event, |
853 | sample); | |
854 | return machine__process_ksymbol_register(machine, event, sample); | |
855 | } | |
856 | ||
246eba8e AH |
857 | int machine__process_text_poke(struct machine *machine, union perf_event *event, |
858 | struct perf_sample *sample __maybe_unused) | |
859 | { | |
860 | struct map *map = maps__find(&machine->kmaps, event->text_poke.addr); | |
861 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
862 | ||
863 | if (dump_trace) | |
7eeb9855 | 864 | perf_event__fprintf_text_poke(event, machine, stdout); |
246eba8e AH |
865 | |
866 | if (!event->text_poke.new_len) | |
867 | return 0; | |
868 | ||
869 | if (cpumode != PERF_RECORD_MISC_KERNEL) { | |
870 | pr_debug("%s: unsupported cpumode - ignoring\n", __func__); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | if (map && map->dso) { | |
875 | u8 *new_bytes = event->text_poke.bytes + event->text_poke.old_len; | |
876 | int ret; | |
877 | ||
878 | /* | |
879 | * Kernel maps might be changed when loading symbols so loading | |
880 | * must be done prior to using kernel maps. | |
881 | */ | |
882 | map__load(map); | |
883 | ret = dso__data_write_cache_addr(map->dso, map, machine, | |
884 | event->text_poke.addr, | |
885 | new_bytes, | |
886 | event->text_poke.new_len); | |
887 | if (ret != event->text_poke.new_len) | |
888 | pr_debug("Failed to write kernel text poke at %#" PRI_lx64 "\n", | |
889 | event->text_poke.addr); | |
890 | } else { | |
891 | pr_debug("Failed to find kernel text poke address map for %#" PRI_lx64 "\n", | |
892 | event->text_poke.addr); | |
893 | } | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
a94ab91a ACM |
898 | static struct map *machine__addnew_module_map(struct machine *machine, u64 start, |
899 | const char *filename) | |
3f067dca | 900 | { |
ca33380a | 901 | struct map *map = NULL; |
ca33380a | 902 | struct kmod_path m; |
a94ab91a | 903 | struct dso *dso; |
3f067dca | 904 | |
ca33380a | 905 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
906 | return NULL; |
907 | ||
9f2de315 | 908 | dso = machine__findnew_module_dso(machine, &m, filename); |
ca33380a JO |
909 | if (dso == NULL) |
910 | goto out; | |
911 | ||
3183f8ca | 912 | map = map__new2(start, dso); |
3f067dca | 913 | if (map == NULL) |
ca33380a | 914 | goto out; |
3f067dca | 915 | |
79b6bb73 | 916 | maps__insert(&machine->kmaps, map); |
ca33380a | 917 | |
4d39c89f | 918 | /* Put the map here because maps__insert already got it */ |
9afcb420 | 919 | map__put(map); |
ca33380a | 920 | out: |
566c69c3 MH |
921 | /* put the dso here, corresponding to machine__findnew_module_dso */ |
922 | dso__put(dso); | |
d8f9da24 | 923 | zfree(&m.name); |
3f067dca ACM |
924 | return map; |
925 | } | |
926 | ||
876650e6 | 927 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
928 | { |
929 | struct rb_node *nd; | |
3d39ac53 | 930 | size_t ret = __dsos__fprintf(&machines->host.dsos.head, fp); |
3f067dca | 931 | |
f3acb3a8 | 932 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 933 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
3d39ac53 | 934 | ret += __dsos__fprintf(&pos->dsos.head, fp); |
3f067dca ACM |
935 | } |
936 | ||
937 | return ret; | |
938 | } | |
939 | ||
8fa7d87f | 940 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
941 | bool (skip)(struct dso *dso, int parm), int parm) |
942 | { | |
3d39ac53 | 943 | return __dsos__fprintf_buildid(&m->dsos.head, fp, skip, parm); |
3f067dca ACM |
944 | } |
945 | ||
876650e6 | 946 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
947 | bool (skip)(struct dso *dso, int parm), int parm) |
948 | { | |
949 | struct rb_node *nd; | |
876650e6 | 950 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 951 | |
f3acb3a8 | 952 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
953 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
954 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
955 | } | |
956 | return ret; | |
957 | } | |
958 | ||
959 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
960 | { | |
961 | int i; | |
962 | size_t printed = 0; | |
93730f85 | 963 | struct dso *kdso = machine__kernel_dso(machine); |
3f067dca ACM |
964 | |
965 | if (kdso->has_build_id) { | |
966 | char filename[PATH_MAX]; | |
d2396999 KJ |
967 | if (dso__build_id_filename(kdso, filename, sizeof(filename), |
968 | false)) | |
3f067dca ACM |
969 | printed += fprintf(fp, "[0] %s\n", filename); |
970 | } | |
971 | ||
972 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
973 | printed += fprintf(fp, "[%d] %s\n", | |
974 | i + kdso->has_build_id, vmlinux_path[i]); | |
975 | ||
976 | return printed; | |
977 | } | |
978 | ||
979 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
980 | { | |
3f067dca | 981 | struct rb_node *nd; |
91e467bc KL |
982 | size_t ret; |
983 | int i; | |
3f067dca | 984 | |
91e467bc KL |
985 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
986 | struct threads *threads = &machine->threads[i]; | |
0a7c74ea ACM |
987 | |
988 | down_read(&threads->lock); | |
d2c11034 | 989 | |
91e467bc | 990 | ret = fprintf(fp, "Threads: %u\n", threads->nr); |
3f067dca | 991 | |
f3acb3a8 DB |
992 | for (nd = rb_first_cached(&threads->entries); nd; |
993 | nd = rb_next(nd)) { | |
91e467bc | 994 | struct thread *pos = rb_entry(nd, struct thread, rb_node); |
3f067dca | 995 | |
91e467bc KL |
996 | ret += thread__fprintf(pos, fp); |
997 | } | |
b91fc39f | 998 | |
0a7c74ea | 999 | up_read(&threads->lock); |
91e467bc | 1000 | } |
3f067dca ACM |
1001 | return ret; |
1002 | } | |
1003 | ||
1004 | static struct dso *machine__get_kernel(struct machine *machine) | |
1005 | { | |
8c7f1bb3 | 1006 | const char *vmlinux_name = machine->mmap_name; |
3f067dca ACM |
1007 | struct dso *kernel; |
1008 | ||
1009 | if (machine__is_host(machine)) { | |
c192524e JO |
1010 | if (symbol_conf.vmlinux_name) |
1011 | vmlinux_name = symbol_conf.vmlinux_name; | |
1012 | ||
459ce518 | 1013 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
1c695c88 | 1014 | "[kernel]", DSO_SPACE__KERNEL); |
3f067dca | 1015 | } else { |
c192524e JO |
1016 | if (symbol_conf.default_guest_vmlinux_name) |
1017 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
1018 | ||
459ce518 ACM |
1019 | kernel = machine__findnew_kernel(machine, vmlinux_name, |
1020 | "[guest.kernel]", | |
1c695c88 | 1021 | DSO_SPACE__KERNEL_GUEST); |
3f067dca ACM |
1022 | } |
1023 | ||
1024 | if (kernel != NULL && (!kernel->has_build_id)) | |
1025 | dso__read_running_kernel_build_id(kernel, machine); | |
1026 | ||
1027 | return kernel; | |
1028 | } | |
1029 | ||
1030 | struct process_args { | |
1031 | u64 start; | |
1032 | }; | |
1033 | ||
1c5aae77 AH |
1034 | void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
1035 | size_t bufsz) | |
15a0a870 AH |
1036 | { |
1037 | if (machine__is_default_guest(machine)) | |
1038 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
1039 | else | |
1040 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
1041 | } | |
1042 | ||
a93f0e55 SQ |
1043 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
1044 | ||
1045 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
1046 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
1047 | * symbol_name if it's not that important. | |
1048 | */ | |
b843f62a | 1049 | static int machine__get_running_kernel_start(struct machine *machine, |
ed9adb20 JO |
1050 | const char **symbol_name, |
1051 | u64 *start, u64 *end) | |
3f067dca | 1052 | { |
15a0a870 | 1053 | char filename[PATH_MAX]; |
b843f62a | 1054 | int i, err = -1; |
a93f0e55 SQ |
1055 | const char *name; |
1056 | u64 addr = 0; | |
3f067dca | 1057 | |
15a0a870 | 1058 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
1059 | |
1060 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
1061 | return 0; | |
1062 | ||
a93f0e55 | 1063 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
b843f62a ACM |
1064 | err = kallsyms__get_function_start(filename, name, &addr); |
1065 | if (!err) | |
a93f0e55 SQ |
1066 | break; |
1067 | } | |
1068 | ||
b843f62a ACM |
1069 | if (err) |
1070 | return -1; | |
1071 | ||
a93f0e55 SQ |
1072 | if (symbol_name) |
1073 | *symbol_name = name; | |
3f067dca | 1074 | |
b843f62a | 1075 | *start = addr; |
ed9adb20 JO |
1076 | |
1077 | err = kallsyms__get_function_start(filename, "_etext", &addr); | |
1078 | if (!err) | |
1079 | *end = addr; | |
1080 | ||
b843f62a | 1081 | return 0; |
3f067dca ACM |
1082 | } |
1083 | ||
1c5aae77 AH |
1084 | int machine__create_extra_kernel_map(struct machine *machine, |
1085 | struct dso *kernel, | |
1086 | struct extra_kernel_map *xm) | |
4d99e413 AH |
1087 | { |
1088 | struct kmap *kmap; | |
1089 | struct map *map; | |
1090 | ||
1091 | map = map__new2(xm->start, kernel); | |
1092 | if (!map) | |
1093 | return -1; | |
1094 | ||
1095 | map->end = xm->end; | |
1096 | map->pgoff = xm->pgoff; | |
1097 | ||
1098 | kmap = map__kmap(map); | |
1099 | ||
5759a682 | 1100 | strlcpy(kmap->name, xm->name, KMAP_NAME_LEN); |
4d99e413 | 1101 | |
79b6bb73 | 1102 | maps__insert(&machine->kmaps, map); |
4d99e413 | 1103 | |
5759a682 AH |
1104 | pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n", |
1105 | kmap->name, map->start, map->end); | |
4d99e413 AH |
1106 | |
1107 | map__put(map); | |
1108 | ||
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | static u64 find_entry_trampoline(struct dso *dso) | |
1113 | { | |
1114 | /* Duplicates are removed so lookup all aliases */ | |
1115 | const char *syms[] = { | |
1116 | "_entry_trampoline", | |
1117 | "__entry_trampoline_start", | |
1118 | "entry_SYSCALL_64_trampoline", | |
1119 | }; | |
1120 | struct symbol *sym = dso__first_symbol(dso); | |
1121 | unsigned int i; | |
1122 | ||
1123 | for (; sym; sym = dso__next_symbol(sym)) { | |
1124 | if (sym->binding != STB_GLOBAL) | |
1125 | continue; | |
1126 | for (i = 0; i < ARRAY_SIZE(syms); i++) { | |
1127 | if (!strcmp(sym->name, syms[i])) | |
1128 | return sym->start; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | /* | |
1136 | * These values can be used for kernels that do not have symbols for the entry | |
1137 | * trampolines in kallsyms. | |
1138 | */ | |
1139 | #define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL | |
1140 | #define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000 | |
1141 | #define X86_64_ENTRY_TRAMPOLINE 0x6000 | |
1142 | ||
1143 | /* Map x86_64 PTI entry trampolines */ | |
1144 | int machine__map_x86_64_entry_trampolines(struct machine *machine, | |
1145 | struct dso *kernel) | |
1146 | { | |
79b6bb73 | 1147 | struct maps *kmaps = &machine->kmaps; |
4d99e413 | 1148 | int nr_cpus_avail, cpu; |
1c5aae77 AH |
1149 | bool found = false; |
1150 | struct map *map; | |
1151 | u64 pgoff; | |
1152 | ||
1153 | /* | |
1154 | * In the vmlinux case, pgoff is a virtual address which must now be | |
1155 | * mapped to a vmlinux offset. | |
1156 | */ | |
79b6bb73 | 1157 | maps__for_each_entry(kmaps, map) { |
1c5aae77 AH |
1158 | struct kmap *kmap = __map__kmap(map); |
1159 | struct map *dest_map; | |
1160 | ||
1161 | if (!kmap || !is_entry_trampoline(kmap->name)) | |
1162 | continue; | |
1163 | ||
79b6bb73 | 1164 | dest_map = maps__find(kmaps, map->pgoff); |
1c5aae77 AH |
1165 | if (dest_map != map) |
1166 | map->pgoff = dest_map->map_ip(dest_map, map->pgoff); | |
1167 | found = true; | |
1168 | } | |
1169 | if (found || machine->trampolines_mapped) | |
1170 | return 0; | |
4d99e413 | 1171 | |
1c5aae77 | 1172 | pgoff = find_entry_trampoline(kernel); |
4d99e413 AH |
1173 | if (!pgoff) |
1174 | return 0; | |
1175 | ||
1176 | nr_cpus_avail = machine__nr_cpus_avail(machine); | |
1177 | ||
1178 | /* Add a 1 page map for each CPU's entry trampoline */ | |
1179 | for (cpu = 0; cpu < nr_cpus_avail; cpu++) { | |
1180 | u64 va = X86_64_CPU_ENTRY_AREA_PER_CPU + | |
1181 | cpu * X86_64_CPU_ENTRY_AREA_SIZE + | |
1182 | X86_64_ENTRY_TRAMPOLINE; | |
1183 | struct extra_kernel_map xm = { | |
1184 | .start = va, | |
1185 | .end = va + page_size, | |
1186 | .pgoff = pgoff, | |
1187 | }; | |
1188 | ||
5759a682 AH |
1189 | strlcpy(xm.name, ENTRY_TRAMPOLINE_NAME, KMAP_NAME_LEN); |
1190 | ||
4d99e413 AH |
1191 | if (machine__create_extra_kernel_map(machine, kernel, &xm) < 0) |
1192 | return -1; | |
1193 | } | |
1194 | ||
1c5aae77 AH |
1195 | machine->trampolines_mapped = nr_cpus_avail; |
1196 | ||
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | int __weak machine__create_extra_kernel_maps(struct machine *machine __maybe_unused, | |
1201 | struct dso *kernel __maybe_unused) | |
1202 | { | |
4d99e413 AH |
1203 | return 0; |
1204 | } | |
1205 | ||
1fb87b8e JO |
1206 | static int |
1207 | __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
3f067dca | 1208 | { |
cc1121ab MH |
1209 | /* In case of renewal the kernel map, destroy previous one */ |
1210 | machine__destroy_kernel_maps(machine); | |
1211 | ||
3183f8ca ACM |
1212 | machine->vmlinux_map = map__new2(0, kernel); |
1213 | if (machine->vmlinux_map == NULL) | |
1214 | return -1; | |
3f067dca | 1215 | |
3183f8ca | 1216 | machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip; |
484214f4 | 1217 | maps__insert(&machine->kmaps, machine->vmlinux_map); |
3f067dca ACM |
1218 | return 0; |
1219 | } | |
1220 | ||
1221 | void machine__destroy_kernel_maps(struct machine *machine) | |
1222 | { | |
3183f8ca ACM |
1223 | struct kmap *kmap; |
1224 | struct map *map = machine__kernel_map(machine); | |
3f067dca | 1225 | |
3183f8ca ACM |
1226 | if (map == NULL) |
1227 | return; | |
3f067dca | 1228 | |
3183f8ca | 1229 | kmap = map__kmap(map); |
79b6bb73 | 1230 | maps__remove(&machine->kmaps, map); |
3183f8ca ACM |
1231 | if (kmap && kmap->ref_reloc_sym) { |
1232 | zfree((char **)&kmap->ref_reloc_sym->name); | |
1233 | zfree(&kmap->ref_reloc_sym); | |
3f067dca | 1234 | } |
3183f8ca ACM |
1235 | |
1236 | map__zput(machine->vmlinux_map); | |
3f067dca ACM |
1237 | } |
1238 | ||
876650e6 | 1239 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
1240 | { |
1241 | int ret = 0; | |
1242 | struct dirent **namelist = NULL; | |
1243 | int i, items = 0; | |
1244 | char path[PATH_MAX]; | |
1245 | pid_t pid; | |
1246 | char *endp; | |
1247 | ||
1248 | if (symbol_conf.default_guest_vmlinux_name || | |
1249 | symbol_conf.default_guest_modules || | |
1250 | symbol_conf.default_guest_kallsyms) { | |
1251 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
1252 | } | |
1253 | ||
1254 | if (symbol_conf.guestmount) { | |
1255 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
1256 | if (items <= 0) | |
1257 | return -ENOENT; | |
1258 | for (i = 0; i < items; i++) { | |
1259 | if (!isdigit(namelist[i]->d_name[0])) { | |
1260 | /* Filter out . and .. */ | |
1261 | continue; | |
1262 | } | |
1263 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
1264 | if ((*endp != '\0') || | |
1265 | (endp == namelist[i]->d_name) || | |
1266 | (errno == ERANGE)) { | |
1267 | pr_debug("invalid directory (%s). Skipping.\n", | |
1268 | namelist[i]->d_name); | |
1269 | continue; | |
1270 | } | |
1271 | sprintf(path, "%s/%s/proc/kallsyms", | |
1272 | symbol_conf.guestmount, | |
1273 | namelist[i]->d_name); | |
1274 | ret = access(path, R_OK); | |
1275 | if (ret) { | |
1276 | pr_debug("Can't access file %s\n", path); | |
1277 | goto failure; | |
1278 | } | |
1279 | machines__create_kernel_maps(machines, pid); | |
1280 | } | |
1281 | failure: | |
1282 | free(namelist); | |
1283 | } | |
1284 | ||
1285 | return ret; | |
1286 | } | |
1287 | ||
876650e6 | 1288 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 1289 | { |
f3acb3a8 | 1290 | struct rb_node *next = rb_first_cached(&machines->guests); |
876650e6 ACM |
1291 | |
1292 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
1293 | |
1294 | while (next) { | |
1295 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
1296 | ||
1297 | next = rb_next(&pos->rb_node); | |
f3acb3a8 | 1298 | rb_erase_cached(&pos->rb_node, &machines->guests); |
3f067dca ACM |
1299 | machine__delete(pos); |
1300 | } | |
1301 | } | |
1302 | ||
876650e6 | 1303 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
1304 | { |
1305 | struct machine *machine = machines__findnew(machines, pid); | |
1306 | ||
1307 | if (machine == NULL) | |
1308 | return -1; | |
1309 | ||
1310 | return machine__create_kernel_maps(machine); | |
1311 | } | |
1312 | ||
3183f8ca | 1313 | int machine__load_kallsyms(struct machine *machine, const char *filename) |
3f067dca | 1314 | { |
a5e813c6 | 1315 | struct map *map = machine__kernel_map(machine); |
e8f3879f | 1316 | int ret = __dso__load_kallsyms(map->dso, filename, map, true); |
3f067dca ACM |
1317 | |
1318 | if (ret > 0) { | |
3183f8ca | 1319 | dso__set_loaded(map->dso); |
3f067dca ACM |
1320 | /* |
1321 | * Since /proc/kallsyms will have multiple sessions for the | |
1322 | * kernel, with modules between them, fixup the end of all | |
1323 | * sections. | |
1324 | */ | |
79b6bb73 | 1325 | maps__fixup_end(&machine->kmaps); |
3f067dca ACM |
1326 | } |
1327 | ||
1328 | return ret; | |
1329 | } | |
1330 | ||
1d1a2654 | 1331 | int machine__load_vmlinux_path(struct machine *machine) |
3f067dca | 1332 | { |
a5e813c6 | 1333 | struct map *map = machine__kernel_map(machine); |
be39db9f | 1334 | int ret = dso__load_vmlinux_path(map->dso, map); |
3f067dca | 1335 | |
39b12f78 | 1336 | if (ret > 0) |
3183f8ca | 1337 | dso__set_loaded(map->dso); |
3f067dca ACM |
1338 | |
1339 | return ret; | |
1340 | } | |
1341 | ||
3f067dca ACM |
1342 | static char *get_kernel_version(const char *root_dir) |
1343 | { | |
1344 | char version[PATH_MAX]; | |
1345 | FILE *file; | |
1346 | char *name, *tmp; | |
1347 | const char *prefix = "Linux version "; | |
1348 | ||
1349 | sprintf(version, "%s/proc/version", root_dir); | |
1350 | file = fopen(version, "r"); | |
1351 | if (!file) | |
1352 | return NULL; | |
1353 | ||
3f067dca ACM |
1354 | tmp = fgets(version, sizeof(version), file); |
1355 | fclose(file); | |
34b65aff DY |
1356 | if (!tmp) |
1357 | return NULL; | |
3f067dca ACM |
1358 | |
1359 | name = strstr(version, prefix); | |
1360 | if (!name) | |
1361 | return NULL; | |
1362 | name += strlen(prefix); | |
1363 | tmp = strchr(name, ' '); | |
1364 | if (tmp) | |
1365 | *tmp = '\0'; | |
1366 | ||
1367 | return strdup(name); | |
1368 | } | |
1369 | ||
bb58a8a4 JO |
1370 | static bool is_kmod_dso(struct dso *dso) |
1371 | { | |
1372 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
1373 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
1374 | } | |
1375 | ||
9a29ceee | 1376 | static int maps__set_module_path(struct maps *maps, const char *path, struct kmod_path *m) |
bb58a8a4 | 1377 | { |
bb58a8a4 | 1378 | char *long_name; |
9a29ceee | 1379 | struct map *map = maps__find_by_name(maps, m->name); |
bb58a8a4 | 1380 | |
bb58a8a4 JO |
1381 | if (map == NULL) |
1382 | return 0; | |
1383 | ||
1384 | long_name = strdup(path); | |
1385 | if (long_name == NULL) | |
1386 | return -ENOMEM; | |
1387 | ||
1388 | dso__set_long_name(map->dso, long_name, true); | |
1389 | dso__kernel_module_get_build_id(map->dso, ""); | |
1390 | ||
1391 | /* | |
1392 | * Full name could reveal us kmod compression, so | |
1393 | * we need to update the symtab_type if needed. | |
1394 | */ | |
2af52475 | 1395 | if (m->comp && is_kmod_dso(map->dso)) { |
bb58a8a4 | 1396 | map->dso->symtab_type++; |
2af52475 JO |
1397 | map->dso->comp = m->comp; |
1398 | } | |
bb58a8a4 JO |
1399 | |
1400 | return 0; | |
1401 | } | |
1402 | ||
9a29ceee | 1403 | static int maps__set_modules_path_dir(struct maps *maps, const char *dir_name, int depth) |
3f067dca ACM |
1404 | { |
1405 | struct dirent *dent; | |
1406 | DIR *dir = opendir(dir_name); | |
1407 | int ret = 0; | |
1408 | ||
1409 | if (!dir) { | |
1410 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
1411 | return -1; | |
1412 | } | |
1413 | ||
1414 | while ((dent = readdir(dir)) != NULL) { | |
1415 | char path[PATH_MAX]; | |
1416 | struct stat st; | |
1417 | ||
1418 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
1419 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
1420 | if (stat(path, &st)) | |
1421 | continue; | |
1422 | ||
1423 | if (S_ISDIR(st.st_mode)) { | |
1424 | if (!strcmp(dent->d_name, ".") || | |
1425 | !strcmp(dent->d_name, "..")) | |
1426 | continue; | |
1427 | ||
61d4290c RY |
1428 | /* Do not follow top-level source and build symlinks */ |
1429 | if (depth == 0) { | |
1430 | if (!strcmp(dent->d_name, "source") || | |
1431 | !strcmp(dent->d_name, "build")) | |
1432 | continue; | |
1433 | } | |
1434 | ||
9a29ceee | 1435 | ret = maps__set_modules_path_dir(maps, path, depth + 1); |
3f067dca ACM |
1436 | if (ret < 0) |
1437 | goto out; | |
1438 | } else { | |
bb58a8a4 | 1439 | struct kmod_path m; |
3f067dca | 1440 | |
bb58a8a4 JO |
1441 | ret = kmod_path__parse_name(&m, dent->d_name); |
1442 | if (ret) | |
1443 | goto out; | |
c00c48fc | 1444 | |
bb58a8a4 | 1445 | if (m.kmod) |
9a29ceee | 1446 | ret = maps__set_module_path(maps, path, &m); |
c00c48fc | 1447 | |
d8f9da24 | 1448 | zfree(&m.name); |
3f067dca | 1449 | |
bb58a8a4 | 1450 | if (ret) |
3f067dca | 1451 | goto out; |
3f067dca ACM |
1452 | } |
1453 | } | |
1454 | ||
1455 | out: | |
1456 | closedir(dir); | |
1457 | return ret; | |
1458 | } | |
1459 | ||
1460 | static int machine__set_modules_path(struct machine *machine) | |
1461 | { | |
1462 | char *version; | |
1463 | char modules_path[PATH_MAX]; | |
1464 | ||
1465 | version = get_kernel_version(machine->root_dir); | |
1466 | if (!version) | |
1467 | return -1; | |
1468 | ||
61d4290c | 1469 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
1470 | machine->root_dir, version); |
1471 | free(version); | |
1472 | ||
79b6bb73 | 1473 | return maps__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca | 1474 | } |
203d8a4a | 1475 | int __weak arch__fix_module_text_start(u64 *start __maybe_unused, |
12a6d294 | 1476 | u64 *size __maybe_unused, |
203d8a4a SSG |
1477 | const char *name __maybe_unused) |
1478 | { | |
1479 | return 0; | |
1480 | } | |
3f067dca | 1481 | |
9ad4652b TR |
1482 | static int machine__create_module(void *arg, const char *name, u64 start, |
1483 | u64 size) | |
3f067dca | 1484 | { |
316d70d6 | 1485 | struct machine *machine = arg; |
3f067dca | 1486 | struct map *map; |
316d70d6 | 1487 | |
12a6d294 | 1488 | if (arch__fix_module_text_start(&start, &size, name) < 0) |
203d8a4a SSG |
1489 | return -1; |
1490 | ||
a94ab91a | 1491 | map = machine__addnew_module_map(machine, start, name); |
316d70d6 AH |
1492 | if (map == NULL) |
1493 | return -1; | |
9ad4652b | 1494 | map->end = start + size; |
316d70d6 AH |
1495 | |
1496 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
1497 | ||
1498 | return 0; | |
1499 | } | |
1500 | ||
1501 | static int machine__create_modules(struct machine *machine) | |
1502 | { | |
3f067dca ACM |
1503 | const char *modules; |
1504 | char path[PATH_MAX]; | |
1505 | ||
f4be904d | 1506 | if (machine__is_default_guest(machine)) { |
3f067dca | 1507 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
1508 | } else { |
1509 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
1510 | modules = path; |
1511 | } | |
1512 | ||
aa7fe3b0 | 1513 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1514 | return -1; |
1515 | ||
316d70d6 | 1516 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1517 | return -1; |
1518 | ||
316d70d6 AH |
1519 | if (!machine__set_modules_path(machine)) |
1520 | return 0; | |
3f067dca | 1521 | |
316d70d6 | 1522 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1523 | |
8f76fcd9 | 1524 | return 0; |
3f067dca ACM |
1525 | } |
1526 | ||
1fb87b8e JO |
1527 | static void machine__set_kernel_mmap(struct machine *machine, |
1528 | u64 start, u64 end) | |
1529 | { | |
3183f8ca ACM |
1530 | machine->vmlinux_map->start = start; |
1531 | machine->vmlinux_map->end = end; | |
1532 | /* | |
1533 | * Be a bit paranoid here, some perf.data file came with | |
1534 | * a zero sized synthesized MMAP event for the kernel. | |
1535 | */ | |
1536 | if (start == 0 && end == 0) | |
1537 | machine->vmlinux_map->end = ~0ULL; | |
1fb87b8e JO |
1538 | } |
1539 | ||
977c7a6d WL |
1540 | static void machine__update_kernel_mmap(struct machine *machine, |
1541 | u64 start, u64 end) | |
1542 | { | |
1543 | struct map *map = machine__kernel_map(machine); | |
1544 | ||
1545 | map__get(map); | |
79b6bb73 | 1546 | maps__remove(&machine->kmaps, map); |
977c7a6d WL |
1547 | |
1548 | machine__set_kernel_mmap(machine, start, end); | |
1549 | ||
79b6bb73 | 1550 | maps__insert(&machine->kmaps, map); |
977c7a6d WL |
1551 | map__put(map); |
1552 | } | |
1553 | ||
3f067dca ACM |
1554 | int machine__create_kernel_maps(struct machine *machine) |
1555 | { | |
1556 | struct dso *kernel = machine__get_kernel(machine); | |
b843f62a | 1557 | const char *name = NULL; |
ee05d217 | 1558 | struct map *map; |
ed9adb20 | 1559 | u64 start = 0, end = ~0ULL; |
1154c957 MH |
1560 | int ret; |
1561 | ||
45e90056 | 1562 | if (kernel == NULL) |
5512cf24 | 1563 | return -1; |
3f067dca | 1564 | |
1154c957 | 1565 | ret = __machine__create_kernel_maps(machine, kernel); |
1154c957 | 1566 | if (ret < 0) |
1c5aae77 | 1567 | goto out_put; |
3f067dca ACM |
1568 | |
1569 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1570 | if (machine__is_host(machine)) | |
1571 | pr_debug("Problems creating module maps, " | |
1572 | "continuing anyway...\n"); | |
1573 | else | |
1574 | pr_debug("Problems creating module maps for guest %d, " | |
1575 | "continuing anyway...\n", machine->pid); | |
1576 | } | |
1577 | ||
ed9adb20 | 1578 | if (!machine__get_running_kernel_start(machine, &name, &start, &end)) { |
3f938ee2 | 1579 | if (name && |
ed9adb20 | 1580 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, name, start)) { |
3f938ee2 | 1581 | machine__destroy_kernel_maps(machine); |
1c5aae77 AH |
1582 | ret = -1; |
1583 | goto out_put; | |
3f938ee2 | 1584 | } |
ee05d217 | 1585 | |
977c7a6d WL |
1586 | /* |
1587 | * we have a real start address now, so re-order the kmaps | |
1588 | * assume it's the last in the kmaps | |
1589 | */ | |
ed9adb20 | 1590 | machine__update_kernel_mmap(machine, start, end); |
5512cf24 AH |
1591 | } |
1592 | ||
1c5aae77 AH |
1593 | if (machine__create_extra_kernel_maps(machine, kernel)) |
1594 | pr_debug("Problems creating extra kernel maps, continuing anyway...\n"); | |
1595 | ||
ed9adb20 JO |
1596 | if (end == ~0ULL) { |
1597 | /* update end address of the kernel map using adjacent module address */ | |
1598 | map = map__next(machine__kernel_map(machine)); | |
1599 | if (map) | |
1600 | machine__set_kernel_mmap(machine, start, map->start); | |
1601 | } | |
1602 | ||
1c5aae77 AH |
1603 | out_put: |
1604 | dso__put(kernel); | |
1605 | return ret; | |
3f067dca ACM |
1606 | } |
1607 | ||
8e0cf965 AH |
1608 | static bool machine__uses_kcore(struct machine *machine) |
1609 | { | |
1610 | struct dso *dso; | |
1611 | ||
3d39ac53 | 1612 | list_for_each_entry(dso, &machine->dsos.head, node) { |
8e0cf965 AH |
1613 | if (dso__is_kcore(dso)) |
1614 | return true; | |
1615 | } | |
1616 | ||
1617 | return false; | |
1618 | } | |
1619 | ||
a8ce99b0 | 1620 | static bool perf_event__is_extra_kernel_mmap(struct machine *machine, |
031f112f | 1621 | struct extra_kernel_map *xm) |
a8ce99b0 AH |
1622 | { |
1623 | return machine__is(machine, "x86_64") && | |
031f112f | 1624 | is_entry_trampoline(xm->name); |
a8ce99b0 AH |
1625 | } |
1626 | ||
1627 | static int machine__process_extra_kernel_map(struct machine *machine, | |
031f112f | 1628 | struct extra_kernel_map *xm) |
a8ce99b0 | 1629 | { |
93730f85 | 1630 | struct dso *kernel = machine__kernel_dso(machine); |
a8ce99b0 AH |
1631 | |
1632 | if (kernel == NULL) | |
1633 | return -1; | |
1634 | ||
031f112f | 1635 | return machine__create_extra_kernel_map(machine, kernel, xm); |
a8ce99b0 AH |
1636 | } |
1637 | ||
b0a7d1a0 | 1638 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1ca6e802 JO |
1639 | struct extra_kernel_map *xm, |
1640 | struct build_id *bid) | |
b0a7d1a0 ACM |
1641 | { |
1642 | struct map *map; | |
1c695c88 | 1643 | enum dso_space_type dso_space; |
b0a7d1a0 ACM |
1644 | bool is_kernel_mmap; |
1645 | ||
8e0cf965 AH |
1646 | /* If we have maps from kcore then we do not need or want any others */ |
1647 | if (machine__uses_kcore(machine)) | |
1648 | return 0; | |
1649 | ||
b0a7d1a0 | 1650 | if (machine__is_host(machine)) |
1c695c88 | 1651 | dso_space = DSO_SPACE__KERNEL; |
b0a7d1a0 | 1652 | else |
1c695c88 | 1653 | dso_space = DSO_SPACE__KERNEL_GUEST; |
b0a7d1a0 | 1654 | |
031f112f | 1655 | is_kernel_mmap = memcmp(xm->name, machine->mmap_name, |
8c7f1bb3 | 1656 | strlen(machine->mmap_name) - 1) == 0; |
031f112f JO |
1657 | if (xm->name[0] == '/' || |
1658 | (!is_kernel_mmap && xm->name[0] == '[')) { | |
1659 | map = machine__addnew_module_map(machine, xm->start, | |
1660 | xm->name); | |
b0a7d1a0 ACM |
1661 | if (map == NULL) |
1662 | goto out_problem; | |
1663 | ||
031f112f | 1664 | map->end = map->start + xm->end - xm->start; |
1ca6e802 JO |
1665 | |
1666 | if (build_id__is_defined(bid)) | |
1667 | dso__set_build_id(map->dso, bid); | |
1668 | ||
b0a7d1a0 | 1669 | } else if (is_kernel_mmap) { |
031f112f | 1670 | const char *symbol_name = (xm->name + strlen(machine->mmap_name)); |
b0a7d1a0 ACM |
1671 | /* |
1672 | * Should be there already, from the build-id table in | |
1673 | * the header. | |
1674 | */ | |
b837a8bd NK |
1675 | struct dso *kernel = NULL; |
1676 | struct dso *dso; | |
1677 | ||
0a7c74ea | 1678 | down_read(&machine->dsos.lock); |
e8807844 | 1679 | |
3d39ac53 | 1680 | list_for_each_entry(dso, &machine->dsos.head, node) { |
1f121b03 WN |
1681 | |
1682 | /* | |
1683 | * The cpumode passed to is_kernel_module is not the | |
1684 | * cpumode of *this* event. If we insist on passing | |
1685 | * correct cpumode to is_kernel_module, we should | |
1686 | * record the cpumode when we adding this dso to the | |
1687 | * linked list. | |
1688 | * | |
1689 | * However we don't really need passing correct | |
1690 | * cpumode. We know the correct cpumode must be kernel | |
1691 | * mode (if not, we should not link it onto kernel_dsos | |
1692 | * list). | |
1693 | * | |
1694 | * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN. | |
1695 | * is_kernel_module() treats it as a kernel cpumode. | |
1696 | */ | |
1697 | ||
1698 | if (!dso->kernel || | |
1699 | is_kernel_module(dso->long_name, | |
1700 | PERF_RECORD_MISC_CPUMODE_UNKNOWN)) | |
b837a8bd NK |
1701 | continue; |
1702 | ||
1f121b03 | 1703 | |
b837a8bd NK |
1704 | kernel = dso; |
1705 | break; | |
1706 | } | |
1707 | ||
0a7c74ea | 1708 | up_read(&machine->dsos.lock); |
e8807844 | 1709 | |
b837a8bd | 1710 | if (kernel == NULL) |
8c7f1bb3 | 1711 | kernel = machine__findnew_dso(machine, machine->mmap_name); |
b0a7d1a0 ACM |
1712 | if (kernel == NULL) |
1713 | goto out_problem; | |
1714 | ||
1c695c88 | 1715 | kernel->kernel = dso_space; |
d3a7c489 ACM |
1716 | if (__machine__create_kernel_maps(machine, kernel) < 0) { |
1717 | dso__put(kernel); | |
b0a7d1a0 | 1718 | goto out_problem; |
d3a7c489 | 1719 | } |
b0a7d1a0 | 1720 | |
330dfa22 NK |
1721 | if (strstr(kernel->long_name, "vmlinux")) |
1722 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1723 | |
031f112f | 1724 | machine__update_kernel_mmap(machine, xm->start, xm->end); |
b0a7d1a0 | 1725 | |
1ca6e802 JO |
1726 | if (build_id__is_defined(bid)) |
1727 | dso__set_build_id(kernel, bid); | |
1728 | ||
b0a7d1a0 ACM |
1729 | /* |
1730 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1731 | * symbol. Effectively having zero here means that at record | |
1732 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1733 | */ | |
031f112f | 1734 | if (xm->pgoff != 0) { |
3183f8ca ACM |
1735 | map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map, |
1736 | symbol_name, | |
031f112f | 1737 | xm->pgoff); |
b0a7d1a0 ACM |
1738 | } |
1739 | ||
1740 | if (machine__is_default_guest(machine)) { | |
1741 | /* | |
1742 | * preload dso of guest kernel and modules | |
1743 | */ | |
be39db9f | 1744 | dso__load(kernel, machine__kernel_map(machine)); |
b0a7d1a0 | 1745 | } |
031f112f JO |
1746 | } else if (perf_event__is_extra_kernel_mmap(machine, xm)) { |
1747 | return machine__process_extra_kernel_map(machine, xm); | |
b0a7d1a0 ACM |
1748 | } |
1749 | return 0; | |
1750 | out_problem: | |
1751 | return -1; | |
1752 | } | |
1753 | ||
5c5e854b | 1754 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef | 1755 | union perf_event *event, |
473398a2 | 1756 | struct perf_sample *sample) |
5c5e854b | 1757 | { |
5c5e854b SE |
1758 | struct thread *thread; |
1759 | struct map *map; | |
4a7380a5 ACM |
1760 | struct dso_id dso_id = { |
1761 | .maj = event->mmap2.maj, | |
1762 | .min = event->mmap2.min, | |
1763 | .ino = event->mmap2.ino, | |
1764 | .ino_generation = event->mmap2.ino_generation, | |
1765 | }; | |
1ca6e802 | 1766 | struct build_id __bid, *bid = NULL; |
5c5e854b SE |
1767 | int ret = 0; |
1768 | ||
1769 | if (dump_trace) | |
1770 | perf_event__fprintf_mmap2(event, stdout); | |
1771 | ||
1ca6e802 JO |
1772 | if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) { |
1773 | bid = &__bid; | |
1774 | build_id__init(bid, event->mmap2.build_id, event->mmap2.build_id_size); | |
1775 | } | |
1776 | ||
473398a2 ACM |
1777 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1778 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
031f112f JO |
1779 | struct extra_kernel_map xm = { |
1780 | .start = event->mmap2.start, | |
1781 | .end = event->mmap2.start + event->mmap2.len, | |
1782 | .pgoff = event->mmap2.pgoff, | |
1783 | }; | |
1784 | ||
1785 | strlcpy(xm.name, event->mmap2.filename, KMAP_NAME_LEN); | |
1ca6e802 | 1786 | ret = machine__process_kernel_mmap_event(machine, &xm, bid); |
5c5e854b SE |
1787 | if (ret < 0) |
1788 | goto out_problem; | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1793 | event->mmap2.tid); |
5c5e854b SE |
1794 | if (thread == NULL) |
1795 | goto out_problem; | |
1796 | ||
2a03068c | 1797 | map = map__new(machine, event->mmap2.start, |
5c5e854b | 1798 | event->mmap2.len, event->mmap2.pgoff, |
4a7380a5 | 1799 | &dso_id, event->mmap2.prot, |
1ca6e802 | 1800 | event->mmap2.flags, bid, |
3183f8ca | 1801 | event->mmap2.filename, thread); |
5c5e854b SE |
1802 | |
1803 | if (map == NULL) | |
b91fc39f | 1804 | goto out_problem_map; |
5c5e854b | 1805 | |
8132a2a8 HK |
1806 | ret = thread__insert_map(thread, map); |
1807 | if (ret) | |
1808 | goto out_problem_insert; | |
1809 | ||
b91fc39f | 1810 | thread__put(thread); |
84c2cafa | 1811 | map__put(map); |
5c5e854b SE |
1812 | return 0; |
1813 | ||
8132a2a8 HK |
1814 | out_problem_insert: |
1815 | map__put(map); | |
b91fc39f ACM |
1816 | out_problem_map: |
1817 | thread__put(thread); | |
5c5e854b SE |
1818 | out_problem: |
1819 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1820 | return 0; | |
1821 | } | |
1822 | ||
162f0bef | 1823 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
473398a2 | 1824 | struct perf_sample *sample) |
b0a7d1a0 | 1825 | { |
b0a7d1a0 ACM |
1826 | struct thread *thread; |
1827 | struct map *map; | |
0f476f2b | 1828 | u32 prot = 0; |
b0a7d1a0 ACM |
1829 | int ret = 0; |
1830 | ||
1831 | if (dump_trace) | |
1832 | perf_event__fprintf_mmap(event, stdout); | |
1833 | ||
473398a2 ACM |
1834 | if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL || |
1835 | sample->cpumode == PERF_RECORD_MISC_KERNEL) { | |
031f112f JO |
1836 | struct extra_kernel_map xm = { |
1837 | .start = event->mmap.start, | |
1838 | .end = event->mmap.start + event->mmap.len, | |
1839 | .pgoff = event->mmap.pgoff, | |
1840 | }; | |
1841 | ||
1842 | strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN); | |
1ca6e802 | 1843 | ret = machine__process_kernel_mmap_event(machine, &xm, NULL); |
b0a7d1a0 ACM |
1844 | if (ret < 0) |
1845 | goto out_problem; | |
1846 | return 0; | |
1847 | } | |
1848 | ||
314add6b | 1849 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1850 | event->mmap.tid); |
b0a7d1a0 ACM |
1851 | if (thread == NULL) |
1852 | goto out_problem; | |
bad40917 | 1853 | |
3183f8ca | 1854 | if (!(event->header.misc & PERF_RECORD_MISC_MMAP_DATA)) |
0f476f2b | 1855 | prot = PROT_EXEC; |
bad40917 | 1856 | |
2a03068c | 1857 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1858 | event->mmap.len, event->mmap.pgoff, |
1ca6e802 | 1859 | NULL, prot, 0, NULL, event->mmap.filename, thread); |
bad40917 | 1860 | |
b0a7d1a0 | 1861 | if (map == NULL) |
b91fc39f | 1862 | goto out_problem_map; |
b0a7d1a0 | 1863 | |
8132a2a8 HK |
1864 | ret = thread__insert_map(thread, map); |
1865 | if (ret) | |
1866 | goto out_problem_insert; | |
1867 | ||
b91fc39f | 1868 | thread__put(thread); |
84c2cafa | 1869 | map__put(map); |
b0a7d1a0 ACM |
1870 | return 0; |
1871 | ||
8132a2a8 HK |
1872 | out_problem_insert: |
1873 | map__put(map); | |
b91fc39f ACM |
1874 | out_problem_map: |
1875 | thread__put(thread); | |
b0a7d1a0 ACM |
1876 | out_problem: |
1877 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1878 | return 0; | |
1879 | } | |
1880 | ||
b91fc39f | 1881 | static void __machine__remove_thread(struct machine *machine, struct thread *th, bool lock) |
236a3bbd | 1882 | { |
91e467bc KL |
1883 | struct threads *threads = machine__threads(machine, th->tid); |
1884 | ||
1885 | if (threads->last_match == th) | |
67fda0f3 | 1886 | threads__set_last_match(threads, NULL); |
f3b623b8 | 1887 | |
b91fc39f | 1888 | if (lock) |
0a7c74ea | 1889 | down_write(&threads->lock); |
4c00af0e ACM |
1890 | |
1891 | BUG_ON(refcount_read(&th->refcnt) == 0); | |
1892 | ||
f3acb3a8 | 1893 | rb_erase_cached(&th->rb_node, &threads->entries); |
b91fc39f | 1894 | RB_CLEAR_NODE(&th->rb_node); |
91e467bc | 1895 | --threads->nr; |
236a3bbd | 1896 | /* |
f3b623b8 ACM |
1897 | * Move it first to the dead_threads list, then drop the reference, |
1898 | * if this is the last reference, then the thread__delete destructor | |
1899 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd | 1900 | */ |
91e467bc | 1901 | list_add_tail(&th->node, &threads->dead); |
4c00af0e ACM |
1902 | |
1903 | /* | |
1904 | * We need to do the put here because if this is the last refcount, | |
1905 | * then we will be touching the threads->dead head when removing the | |
1906 | * thread. | |
1907 | */ | |
1908 | thread__put(th); | |
1909 | ||
b91fc39f | 1910 | if (lock) |
0a7c74ea | 1911 | up_write(&threads->lock); |
236a3bbd DA |
1912 | } |
1913 | ||
b91fc39f ACM |
1914 | void machine__remove_thread(struct machine *machine, struct thread *th) |
1915 | { | |
1916 | return __machine__remove_thread(machine, th, true); | |
1917 | } | |
1918 | ||
162f0bef FW |
1919 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1920 | struct perf_sample *sample) | |
b0a7d1a0 | 1921 | { |
d75e6097 JO |
1922 | struct thread *thread = machine__find_thread(machine, |
1923 | event->fork.pid, | |
1924 | event->fork.tid); | |
314add6b AH |
1925 | struct thread *parent = machine__findnew_thread(machine, |
1926 | event->fork.ppid, | |
1927 | event->fork.ptid); | |
4f8f382e | 1928 | bool do_maps_clone = true; |
b91fc39f | 1929 | int err = 0; |
b0a7d1a0 | 1930 | |
5cb73340 AH |
1931 | if (dump_trace) |
1932 | perf_event__fprintf_task(event, stdout); | |
1933 | ||
1934 | /* | |
1935 | * There may be an existing thread that is not actually the parent, | |
1936 | * either because we are processing events out of order, or because the | |
1937 | * (fork) event that would have removed the thread was lost. Assume the | |
1938 | * latter case and continue on as best we can. | |
1939 | */ | |
1940 | if (parent->pid_ != (pid_t)event->fork.ppid) { | |
1941 | dump_printf("removing erroneous parent thread %d/%d\n", | |
1942 | parent->pid_, parent->tid); | |
1943 | machine__remove_thread(machine, parent); | |
1944 | thread__put(parent); | |
1945 | parent = machine__findnew_thread(machine, event->fork.ppid, | |
1946 | event->fork.ptid); | |
1947 | } | |
1948 | ||
236a3bbd | 1949 | /* if a thread currently exists for the thread id remove it */ |
b91fc39f | 1950 | if (thread != NULL) { |
236a3bbd | 1951 | machine__remove_thread(machine, thread); |
b91fc39f ACM |
1952 | thread__put(thread); |
1953 | } | |
236a3bbd | 1954 | |
314add6b AH |
1955 | thread = machine__findnew_thread(machine, event->fork.pid, |
1956 | event->fork.tid); | |
4f8f382e DM |
1957 | /* |
1958 | * When synthesizing FORK events, we are trying to create thread | |
1959 | * objects for the already running tasks on the machine. | |
1960 | * | |
1961 | * Normally, for a kernel FORK event, we want to clone the parent's | |
1962 | * maps because that is what the kernel just did. | |
1963 | * | |
1964 | * But when synthesizing, this should not be done. If we do, we end up | |
4d39c89f | 1965 | * with overlapping maps as we process the synthesized MMAP2 events that |
4f8f382e DM |
1966 | * get delivered shortly thereafter. |
1967 | * | |
1968 | * Use the FORK event misc flags in an internal way to signal this | |
1969 | * situation, so we can elide the map clone when appropriate. | |
1970 | */ | |
1971 | if (event->fork.header.misc & PERF_RECORD_MISC_FORK_EXEC) | |
1972 | do_maps_clone = false; | |
b0a7d1a0 ACM |
1973 | |
1974 | if (thread == NULL || parent == NULL || | |
4f8f382e | 1975 | thread__fork(thread, parent, sample->time, do_maps_clone) < 0) { |
b0a7d1a0 | 1976 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
b91fc39f | 1977 | err = -1; |
b0a7d1a0 | 1978 | } |
b91fc39f ACM |
1979 | thread__put(thread); |
1980 | thread__put(parent); | |
b0a7d1a0 | 1981 | |
b91fc39f | 1982 | return err; |
b0a7d1a0 ACM |
1983 | } |
1984 | ||
162f0bef FW |
1985 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1986 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1987 | { |
d75e6097 JO |
1988 | struct thread *thread = machine__find_thread(machine, |
1989 | event->fork.pid, | |
1990 | event->fork.tid); | |
b0a7d1a0 ACM |
1991 | |
1992 | if (dump_trace) | |
1993 | perf_event__fprintf_task(event, stdout); | |
1994 | ||
b91fc39f | 1995 | if (thread != NULL) { |
236a3bbd | 1996 | thread__exited(thread); |
b91fc39f ACM |
1997 | thread__put(thread); |
1998 | } | |
b0a7d1a0 ACM |
1999 | |
2000 | return 0; | |
2001 | } | |
2002 | ||
162f0bef FW |
2003 | int machine__process_event(struct machine *machine, union perf_event *event, |
2004 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
2005 | { |
2006 | int ret; | |
2007 | ||
2008 | switch (event->header.type) { | |
2009 | case PERF_RECORD_COMM: | |
162f0bef | 2010 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 2011 | case PERF_RECORD_MMAP: |
162f0bef | 2012 | ret = machine__process_mmap_event(machine, event, sample); break; |
f3b3614a HB |
2013 | case PERF_RECORD_NAMESPACES: |
2014 | ret = machine__process_namespaces_event(machine, event, sample); break; | |
ba78c1c5 NK |
2015 | case PERF_RECORD_CGROUP: |
2016 | ret = machine__process_cgroup_event(machine, event, sample); break; | |
5c5e854b | 2017 | case PERF_RECORD_MMAP2: |
162f0bef | 2018 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 2019 | case PERF_RECORD_FORK: |
162f0bef | 2020 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 2021 | case PERF_RECORD_EXIT: |
162f0bef | 2022 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 2023 | case PERF_RECORD_LOST: |
162f0bef | 2024 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
2025 | case PERF_RECORD_AUX: |
2026 | ret = machine__process_aux_event(machine, event); break; | |
0ad21f68 | 2027 | case PERF_RECORD_ITRACE_START: |
ceb92913 | 2028 | ret = machine__process_itrace_start_event(machine, event); break; |
c4937a91 KL |
2029 | case PERF_RECORD_LOST_SAMPLES: |
2030 | ret = machine__process_lost_samples_event(machine, event, sample); break; | |
0286039f AH |
2031 | case PERF_RECORD_SWITCH: |
2032 | case PERF_RECORD_SWITCH_CPU_WIDE: | |
2033 | ret = machine__process_switch_event(machine, event); break; | |
9aa0bfa3 SL |
2034 | case PERF_RECORD_KSYMBOL: |
2035 | ret = machine__process_ksymbol(machine, event, sample); break; | |
45178a92 | 2036 | case PERF_RECORD_BPF_EVENT: |
3f604b5f | 2037 | ret = machine__process_bpf(machine, event, sample); break; |
246eba8e AH |
2038 | case PERF_RECORD_TEXT_POKE: |
2039 | ret = machine__process_text_poke(machine, event, sample); break; | |
61750473 AH |
2040 | case PERF_RECORD_AUX_OUTPUT_HW_ID: |
2041 | ret = machine__process_aux_output_hw_id_event(machine, event); break; | |
b0a7d1a0 ACM |
2042 | default: |
2043 | ret = -1; | |
2044 | break; | |
2045 | } | |
2046 | ||
2047 | return ret; | |
2048 | } | |
3f067dca | 2049 | |
b21484f1 | 2050 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 2051 | { |
a7c3899c | 2052 | if (!regexec(regex, sym->name, 0, NULL, 0)) |
83ff0f93 JC |
2053 | return true; |
2054 | return false; | |
3f067dca ACM |
2055 | } |
2056 | ||
bb871a9c | 2057 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
2058 | struct addr_map_symbol *ams, |
2059 | u64 ip) | |
2060 | { | |
2061 | struct addr_location al; | |
3f067dca ACM |
2062 | |
2063 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
2064 | /* |
2065 | * We cannot use the header.misc hint to determine whether a | |
2066 | * branch stack address is user, kernel, guest, hypervisor. | |
2067 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
2068 | * Thus, we have to try consecutively until we find a match | |
2069 | * or else, the symbol is unknown | |
2070 | */ | |
26bd9331 | 2071 | thread__find_cpumode_addr_location(thread, ip, &al); |
3f067dca | 2072 | |
3f067dca ACM |
2073 | ams->addr = ip; |
2074 | ams->al_addr = al.addr; | |
f2eaea09 | 2075 | ams->ms.maps = al.maps; |
d46a4cdf ACM |
2076 | ams->ms.sym = al.sym; |
2077 | ams->ms.map = al.map; | |
8780fb25 | 2078 | ams->phys_addr = 0; |
a50d03e3 | 2079 | ams->data_page_size = 0; |
3f067dca ACM |
2080 | } |
2081 | ||
bb871a9c | 2082 | static void ip__resolve_data(struct thread *thread, |
8780fb25 | 2083 | u8 m, struct addr_map_symbol *ams, |
a50d03e3 | 2084 | u64 addr, u64 phys_addr, u64 daddr_page_size) |
98a3b32c SE |
2085 | { |
2086 | struct addr_location al; | |
2087 | ||
2088 | memset(&al, 0, sizeof(al)); | |
2089 | ||
117d3c24 | 2090 | thread__find_symbol(thread, m, addr, &al); |
06b2afc0 | 2091 | |
98a3b32c SE |
2092 | ams->addr = addr; |
2093 | ams->al_addr = al.addr; | |
f2eaea09 | 2094 | ams->ms.maps = al.maps; |
d46a4cdf ACM |
2095 | ams->ms.sym = al.sym; |
2096 | ams->ms.map = al.map; | |
8780fb25 | 2097 | ams->phys_addr = phys_addr; |
a50d03e3 | 2098 | ams->data_page_size = daddr_page_size; |
98a3b32c SE |
2099 | } |
2100 | ||
e80faac0 ACM |
2101 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
2102 | struct addr_location *al) | |
98a3b32c | 2103 | { |
9f87498f | 2104 | struct mem_info *mi = mem_info__new(); |
98a3b32c SE |
2105 | |
2106 | if (!mi) | |
2107 | return NULL; | |
2108 | ||
bb871a9c | 2109 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
8780fb25 | 2110 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, |
a50d03e3 KL |
2111 | sample->addr, sample->phys_addr, |
2112 | sample->data_page_size); | |
98a3b32c SE |
2113 | mi->data_src.val = sample->data_src; |
2114 | ||
2115 | return mi; | |
2116 | } | |
2117 | ||
5f0fef8a | 2118 | static char *callchain_srcline(struct map_symbol *ms, u64 ip) |
40a342cd | 2119 | { |
5f0fef8a | 2120 | struct map *map = ms->map; |
21ac9d54 MW |
2121 | char *srcline = NULL; |
2122 | ||
40a342cd | 2123 | if (!map || callchain_param.key == CCKEY_FUNCTION) |
21ac9d54 MW |
2124 | return srcline; |
2125 | ||
2126 | srcline = srcline__tree_find(&map->dso->srclines, ip); | |
2127 | if (!srcline) { | |
2128 | bool show_sym = false; | |
2129 | bool show_addr = callchain_param.key == CCKEY_ADDRESS; | |
2130 | ||
2131 | srcline = get_srcline(map->dso, map__rip_2objdump(map, ip), | |
5f0fef8a | 2132 | ms->sym, show_sym, show_addr, ip); |
21ac9d54 MW |
2133 | srcline__tree_insert(&map->dso->srclines, ip, srcline); |
2134 | } | |
40a342cd | 2135 | |
21ac9d54 | 2136 | return srcline; |
40a342cd MW |
2137 | } |
2138 | ||
c4ee0625 JY |
2139 | struct iterations { |
2140 | int nr_loop_iter; | |
2141 | u64 cycles; | |
2142 | }; | |
2143 | ||
37592b8a | 2144 | static int add_callchain_ip(struct thread *thread, |
91d7b2de | 2145 | struct callchain_cursor *cursor, |
37592b8a AK |
2146 | struct symbol **parent, |
2147 | struct addr_location *root_al, | |
73dbcd65 | 2148 | u8 *cpumode, |
410024db JY |
2149 | u64 ip, |
2150 | bool branch, | |
2151 | struct branch_flags *flags, | |
c4ee0625 | 2152 | struct iterations *iter, |
b851dd49 | 2153 | u64 branch_from) |
37592b8a | 2154 | { |
5f0fef8a | 2155 | struct map_symbol ms; |
37592b8a | 2156 | struct addr_location al; |
c4ee0625 JY |
2157 | int nr_loop_iter = 0; |
2158 | u64 iter_cycles = 0; | |
40a342cd | 2159 | const char *srcline = NULL; |
37592b8a AK |
2160 | |
2161 | al.filtered = 0; | |
2162 | al.sym = NULL; | |
57f0ff05 | 2163 | al.srcline = NULL; |
73dbcd65 | 2164 | if (!cpumode) { |
26bd9331 | 2165 | thread__find_cpumode_addr_location(thread, ip, &al); |
73dbcd65 | 2166 | } else { |
2e77784b KL |
2167 | if (ip >= PERF_CONTEXT_MAX) { |
2168 | switch (ip) { | |
2169 | case PERF_CONTEXT_HV: | |
73dbcd65 | 2170 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
2171 | break; |
2172 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 2173 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
2174 | break; |
2175 | case PERF_CONTEXT_USER: | |
73dbcd65 | 2176 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
2177 | break; |
2178 | default: | |
2179 | pr_debug("invalid callchain context: " | |
2180 | "%"PRId64"\n", (s64) ip); | |
2181 | /* | |
2182 | * It seems the callchain is corrupted. | |
2183 | * Discard all. | |
2184 | */ | |
91d7b2de | 2185 | callchain_cursor_reset(cursor); |
2e77784b KL |
2186 | return 1; |
2187 | } | |
2188 | return 0; | |
2189 | } | |
4546263d | 2190 | thread__find_symbol(thread, *cpumode, ip, &al); |
2e77784b KL |
2191 | } |
2192 | ||
37592b8a | 2193 | if (al.sym != NULL) { |
de7e6a7c | 2194 | if (perf_hpp_list.parent && !*parent && |
37592b8a AK |
2195 | symbol__match_regex(al.sym, &parent_regex)) |
2196 | *parent = al.sym; | |
2197 | else if (have_ignore_callees && root_al && | |
2198 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
2199 | /* Treat this symbol as the root, | |
2200 | forgetting its callees. */ | |
2201 | *root_al = al; | |
91d7b2de | 2202 | callchain_cursor_reset(cursor); |
37592b8a AK |
2203 | } |
2204 | } | |
2205 | ||
b49a8fe5 NK |
2206 | if (symbol_conf.hide_unresolved && al.sym == NULL) |
2207 | return 0; | |
c4ee0625 JY |
2208 | |
2209 | if (iter) { | |
2210 | nr_loop_iter = iter->nr_loop_iter; | |
2211 | iter_cycles = iter->cycles; | |
2212 | } | |
2213 | ||
f2eaea09 | 2214 | ms.maps = al.maps; |
5f0fef8a ACM |
2215 | ms.map = al.map; |
2216 | ms.sym = al.sym; | |
2217 | srcline = callchain_srcline(&ms, al.addr); | |
2218 | return callchain_cursor_append(cursor, ip, &ms, | |
c4ee0625 | 2219 | branch, flags, nr_loop_iter, |
40a342cd | 2220 | iter_cycles, branch_from, srcline); |
37592b8a AK |
2221 | } |
2222 | ||
644f2df2 ACM |
2223 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
2224 | struct addr_location *al) | |
3f067dca | 2225 | { |
3f067dca | 2226 | unsigned int i; |
644f2df2 | 2227 | const struct branch_stack *bs = sample->branch_stack; |
42bbabed | 2228 | struct branch_entry *entries = perf_sample__branch_entries(sample); |
644f2df2 | 2229 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); |
3f067dca | 2230 | |
3f067dca ACM |
2231 | if (!bi) |
2232 | return NULL; | |
2233 | ||
2234 | for (i = 0; i < bs->nr; i++) { | |
42bbabed KL |
2235 | ip__resolve_ams(al->thread, &bi[i].to, entries[i].to); |
2236 | ip__resolve_ams(al->thread, &bi[i].from, entries[i].from); | |
2237 | bi[i].flags = entries[i].flags; | |
3f067dca ACM |
2238 | } |
2239 | return bi; | |
2240 | } | |
2241 | ||
c4ee0625 JY |
2242 | static void save_iterations(struct iterations *iter, |
2243 | struct branch_entry *be, int nr) | |
2244 | { | |
2245 | int i; | |
2246 | ||
a3366db0 | 2247 | iter->nr_loop_iter++; |
c4ee0625 JY |
2248 | iter->cycles = 0; |
2249 | ||
2250 | for (i = 0; i < nr; i++) | |
2251 | iter->cycles += be[i].flags.cycles; | |
2252 | } | |
2253 | ||
8b7bad58 AK |
2254 | #define CHASHSZ 127 |
2255 | #define CHASHBITS 7 | |
2256 | #define NO_ENTRY 0xff | |
2257 | ||
2258 | #define PERF_MAX_BRANCH_DEPTH 127 | |
2259 | ||
2260 | /* Remove loops. */ | |
c4ee0625 JY |
2261 | static int remove_loops(struct branch_entry *l, int nr, |
2262 | struct iterations *iter) | |
8b7bad58 AK |
2263 | { |
2264 | int i, j, off; | |
2265 | unsigned char chash[CHASHSZ]; | |
2266 | ||
2267 | memset(chash, NO_ENTRY, sizeof(chash)); | |
2268 | ||
2269 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
2270 | ||
2271 | for (i = 0; i < nr; i++) { | |
2272 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
2273 | ||
2274 | /* no collision handling for now */ | |
2275 | if (chash[h] == NO_ENTRY) { | |
2276 | chash[h] = i; | |
2277 | } else if (l[chash[h]].from == l[i].from) { | |
2278 | bool is_loop = true; | |
2279 | /* check if it is a real loop */ | |
2280 | off = 0; | |
2281 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
2282 | if (l[j].from != l[i + off].from) { | |
2283 | is_loop = false; | |
2284 | break; | |
2285 | } | |
2286 | if (is_loop) { | |
c4ee0625 JY |
2287 | j = nr - (i + off); |
2288 | if (j > 0) { | |
2289 | save_iterations(iter + i + off, | |
2290 | l + i, off); | |
2291 | ||
2292 | memmove(iter + i, iter + i + off, | |
2293 | j * sizeof(*iter)); | |
2294 | ||
2295 | memmove(l + i, l + i + off, | |
2296 | j * sizeof(*l)); | |
2297 | } | |
2298 | ||
8b7bad58 AK |
2299 | nr -= off; |
2300 | } | |
2301 | } | |
2302 | } | |
2303 | return nr; | |
2304 | } | |
2305 | ||
dd3e249a KL |
2306 | static int lbr_callchain_add_kernel_ip(struct thread *thread, |
2307 | struct callchain_cursor *cursor, | |
2308 | struct perf_sample *sample, | |
2309 | struct symbol **parent, | |
2310 | struct addr_location *root_al, | |
2311 | u64 branch_from, | |
2312 | bool callee, int end) | |
2313 | { | |
2314 | struct ip_callchain *chain = sample->callchain; | |
2315 | u8 cpumode = PERF_RECORD_MISC_USER; | |
2316 | int err, i; | |
2317 | ||
2318 | if (callee) { | |
2319 | for (i = 0; i < end + 1; i++) { | |
2320 | err = add_callchain_ip(thread, cursor, parent, | |
2321 | root_al, &cpumode, chain->ips[i], | |
2322 | false, NULL, NULL, branch_from); | |
2323 | if (err) | |
2324 | return err; | |
2325 | } | |
2326 | return 0; | |
2327 | } | |
2328 | ||
2329 | for (i = end; i >= 0; i--) { | |
2330 | err = add_callchain_ip(thread, cursor, parent, | |
2331 | root_al, &cpumode, chain->ips[i], | |
2332 | false, NULL, NULL, branch_from); | |
2333 | if (err) | |
2334 | return err; | |
2335 | } | |
2336 | ||
2337 | return 0; | |
2338 | } | |
2339 | ||
7f1d3931 KL |
2340 | static void save_lbr_cursor_node(struct thread *thread, |
2341 | struct callchain_cursor *cursor, | |
2342 | int idx) | |
2343 | { | |
2344 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2345 | ||
2346 | if (!lbr_stitch) | |
2347 | return; | |
2348 | ||
2349 | if (cursor->pos == cursor->nr) { | |
2350 | lbr_stitch->prev_lbr_cursor[idx].valid = false; | |
2351 | return; | |
2352 | } | |
2353 | ||
2354 | if (!cursor->curr) | |
2355 | cursor->curr = cursor->first; | |
2356 | else | |
2357 | cursor->curr = cursor->curr->next; | |
2358 | memcpy(&lbr_stitch->prev_lbr_cursor[idx], cursor->curr, | |
2359 | sizeof(struct callchain_cursor_node)); | |
2360 | ||
2361 | lbr_stitch->prev_lbr_cursor[idx].valid = true; | |
2362 | cursor->pos++; | |
2363 | } | |
2364 | ||
e2b23483 KL |
2365 | static int lbr_callchain_add_lbr_ip(struct thread *thread, |
2366 | struct callchain_cursor *cursor, | |
2367 | struct perf_sample *sample, | |
2368 | struct symbol **parent, | |
2369 | struct addr_location *root_al, | |
2370 | u64 *branch_from, | |
2371 | bool callee) | |
2372 | { | |
2373 | struct branch_stack *lbr_stack = sample->branch_stack; | |
2374 | struct branch_entry *entries = perf_sample__branch_entries(sample); | |
2375 | u8 cpumode = PERF_RECORD_MISC_USER; | |
2376 | int lbr_nr = lbr_stack->nr; | |
2377 | struct branch_flags *flags; | |
2378 | int err, i; | |
2379 | u64 ip; | |
2380 | ||
7f1d3931 KL |
2381 | /* |
2382 | * The curr and pos are not used in writing session. They are cleared | |
2383 | * in callchain_cursor_commit() when the writing session is closed. | |
2384 | * Using curr and pos to track the current cursor node. | |
2385 | */ | |
2386 | if (thread->lbr_stitch) { | |
2387 | cursor->curr = NULL; | |
2388 | cursor->pos = cursor->nr; | |
2389 | if (cursor->nr) { | |
2390 | cursor->curr = cursor->first; | |
2391 | for (i = 0; i < (int)(cursor->nr - 1); i++) | |
2392 | cursor->curr = cursor->curr->next; | |
2393 | } | |
2394 | } | |
2395 | ||
e2b23483 KL |
2396 | if (callee) { |
2397 | /* Add LBR ip from first entries.to */ | |
2398 | ip = entries[0].to; | |
2399 | flags = &entries[0].flags; | |
2400 | *branch_from = entries[0].from; | |
2401 | err = add_callchain_ip(thread, cursor, parent, | |
2402 | root_al, &cpumode, ip, | |
2403 | true, flags, NULL, | |
2404 | *branch_from); | |
2405 | if (err) | |
2406 | return err; | |
2407 | ||
7f1d3931 KL |
2408 | /* |
2409 | * The number of cursor node increases. | |
2410 | * Move the current cursor node. | |
2411 | * But does not need to save current cursor node for entry 0. | |
2412 | * It's impossible to stitch the whole LBRs of previous sample. | |
2413 | */ | |
2414 | if (thread->lbr_stitch && (cursor->pos != cursor->nr)) { | |
2415 | if (!cursor->curr) | |
2416 | cursor->curr = cursor->first; | |
2417 | else | |
2418 | cursor->curr = cursor->curr->next; | |
2419 | cursor->pos++; | |
2420 | } | |
2421 | ||
e2b23483 KL |
2422 | /* Add LBR ip from entries.from one by one. */ |
2423 | for (i = 0; i < lbr_nr; i++) { | |
2424 | ip = entries[i].from; | |
2425 | flags = &entries[i].flags; | |
2426 | err = add_callchain_ip(thread, cursor, parent, | |
2427 | root_al, &cpumode, ip, | |
2428 | true, flags, NULL, | |
2429 | *branch_from); | |
2430 | if (err) | |
2431 | return err; | |
7f1d3931 | 2432 | save_lbr_cursor_node(thread, cursor, i); |
e2b23483 KL |
2433 | } |
2434 | return 0; | |
2435 | } | |
2436 | ||
2437 | /* Add LBR ip from entries.from one by one. */ | |
2438 | for (i = lbr_nr - 1; i >= 0; i--) { | |
2439 | ip = entries[i].from; | |
2440 | flags = &entries[i].flags; | |
2441 | err = add_callchain_ip(thread, cursor, parent, | |
2442 | root_al, &cpumode, ip, | |
2443 | true, flags, NULL, | |
2444 | *branch_from); | |
2445 | if (err) | |
2446 | return err; | |
7f1d3931 | 2447 | save_lbr_cursor_node(thread, cursor, i); |
e2b23483 KL |
2448 | } |
2449 | ||
2450 | /* Add LBR ip from first entries.to */ | |
2451 | ip = entries[0].to; | |
2452 | flags = &entries[0].flags; | |
2453 | *branch_from = entries[0].from; | |
2454 | err = add_callchain_ip(thread, cursor, parent, | |
2455 | root_al, &cpumode, ip, | |
2456 | true, flags, NULL, | |
2457 | *branch_from); | |
2458 | if (err) | |
2459 | return err; | |
2460 | ||
2461 | return 0; | |
2462 | } | |
2463 | ||
ff165628 KL |
2464 | static int lbr_callchain_add_stitched_lbr_ip(struct thread *thread, |
2465 | struct callchain_cursor *cursor) | |
2466 | { | |
2467 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2468 | struct callchain_cursor_node *cnode; | |
2469 | struct stitch_list *stitch_node; | |
2470 | int err; | |
2471 | ||
2472 | list_for_each_entry(stitch_node, &lbr_stitch->lists, node) { | |
2473 | cnode = &stitch_node->cursor; | |
2474 | ||
2475 | err = callchain_cursor_append(cursor, cnode->ip, | |
2476 | &cnode->ms, | |
2477 | cnode->branch, | |
2478 | &cnode->branch_flags, | |
2479 | cnode->nr_loop_iter, | |
2480 | cnode->iter_cycles, | |
2481 | cnode->branch_from, | |
2482 | cnode->srcline); | |
2483 | if (err) | |
2484 | return err; | |
2485 | } | |
2486 | return 0; | |
2487 | } | |
2488 | ||
2489 | static struct stitch_list *get_stitch_node(struct thread *thread) | |
2490 | { | |
2491 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2492 | struct stitch_list *stitch_node; | |
2493 | ||
2494 | if (!list_empty(&lbr_stitch->free_lists)) { | |
2495 | stitch_node = list_first_entry(&lbr_stitch->free_lists, | |
2496 | struct stitch_list, node); | |
2497 | list_del(&stitch_node->node); | |
2498 | ||
2499 | return stitch_node; | |
2500 | } | |
2501 | ||
2502 | return malloc(sizeof(struct stitch_list)); | |
2503 | } | |
2504 | ||
2505 | static bool has_stitched_lbr(struct thread *thread, | |
2506 | struct perf_sample *cur, | |
2507 | struct perf_sample *prev, | |
2508 | unsigned int max_lbr, | |
2509 | bool callee) | |
2510 | { | |
2511 | struct branch_stack *cur_stack = cur->branch_stack; | |
2512 | struct branch_entry *cur_entries = perf_sample__branch_entries(cur); | |
2513 | struct branch_stack *prev_stack = prev->branch_stack; | |
2514 | struct branch_entry *prev_entries = perf_sample__branch_entries(prev); | |
2515 | struct lbr_stitch *lbr_stitch = thread->lbr_stitch; | |
2516 | int i, j, nr_identical_branches = 0; | |
2517 | struct stitch_list *stitch_node; | |
2518 | u64 cur_base, distance; | |
2519 | ||
2520 | if (!cur_stack || !prev_stack) | |
2521 | return false; | |
2522 | ||
2523 | /* Find the physical index of the base-of-stack for current sample. */ | |
2524 | cur_base = max_lbr - cur_stack->nr + cur_stack->hw_idx + 1; | |
2525 | ||
2526 | distance = (prev_stack->hw_idx > cur_base) ? (prev_stack->hw_idx - cur_base) : | |
2527 | (max_lbr + prev_stack->hw_idx - cur_base); | |
2528 | /* Previous sample has shorter stack. Nothing can be stitched. */ | |
2529 | if (distance + 1 > prev_stack->nr) | |
2530 | return false; | |
2531 | ||
2532 | /* | |
2533 | * Check if there are identical LBRs between two samples. | |
4d39c89f | 2534 | * Identical LBRs must have same from, to and flags values. Also, |
ff165628 KL |
2535 | * they have to be saved in the same LBR registers (same physical |
2536 | * index). | |
2537 | * | |
2538 | * Starts from the base-of-stack of current sample. | |
2539 | */ | |
2540 | for (i = distance, j = cur_stack->nr - 1; (i >= 0) && (j >= 0); i--, j--) { | |
2541 | if ((prev_entries[i].from != cur_entries[j].from) || | |
2542 | (prev_entries[i].to != cur_entries[j].to) || | |
2543 | (prev_entries[i].flags.value != cur_entries[j].flags.value)) | |
2544 | break; | |
2545 | nr_identical_branches++; | |
2546 | } | |
2547 | ||
2548 | if (!nr_identical_branches) | |
2549 | return false; | |
2550 | ||
2551 | /* | |
2552 | * Save the LBRs between the base-of-stack of previous sample | |
2553 | * and the base-of-stack of current sample into lbr_stitch->lists. | |
2554 | * These LBRs will be stitched later. | |
2555 | */ | |
2556 | for (i = prev_stack->nr - 1; i > (int)distance; i--) { | |
2557 | ||
2558 | if (!lbr_stitch->prev_lbr_cursor[i].valid) | |
2559 | continue; | |
2560 | ||
2561 | stitch_node = get_stitch_node(thread); | |
2562 | if (!stitch_node) | |
2563 | return false; | |
2564 | ||
2565 | memcpy(&stitch_node->cursor, &lbr_stitch->prev_lbr_cursor[i], | |
2566 | sizeof(struct callchain_cursor_node)); | |
2567 | ||
2568 | if (callee) | |
2569 | list_add(&stitch_node->node, &lbr_stitch->lists); | |
2570 | else | |
2571 | list_add_tail(&stitch_node->node, &lbr_stitch->lists); | |
2572 | } | |
2573 | ||
2574 | return true; | |
2575 | } | |
2576 | ||
7f1d3931 | 2577 | static bool alloc_lbr_stitch(struct thread *thread, unsigned int max_lbr) |
9c6c3f47 KL |
2578 | { |
2579 | if (thread->lbr_stitch) | |
2580 | return true; | |
2581 | ||
2582 | thread->lbr_stitch = zalloc(sizeof(*thread->lbr_stitch)); | |
2583 | if (!thread->lbr_stitch) | |
2584 | goto err; | |
2585 | ||
7f1d3931 KL |
2586 | thread->lbr_stitch->prev_lbr_cursor = calloc(max_lbr + 1, sizeof(struct callchain_cursor_node)); |
2587 | if (!thread->lbr_stitch->prev_lbr_cursor) | |
2588 | goto free_lbr_stitch; | |
2589 | ||
ff165628 KL |
2590 | INIT_LIST_HEAD(&thread->lbr_stitch->lists); |
2591 | INIT_LIST_HEAD(&thread->lbr_stitch->free_lists); | |
2592 | ||
7f1d3931 KL |
2593 | return true; |
2594 | ||
2595 | free_lbr_stitch: | |
2596 | zfree(&thread->lbr_stitch); | |
9c6c3f47 KL |
2597 | err: |
2598 | pr_warning("Failed to allocate space for stitched LBRs. Disable LBR stitch\n"); | |
2599 | thread->lbr_stitch_enable = false; | |
2600 | return false; | |
2601 | } | |
2602 | ||
384b6055 | 2603 | /* |
4d39c89f | 2604 | * Resolve LBR callstack chain sample |
384b6055 KL |
2605 | * Return: |
2606 | * 1 on success get LBR callchain information | |
2607 | * 0 no available LBR callchain information, should try fp | |
2608 | * negative error code on other errors. | |
2609 | */ | |
2610 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
91d7b2de | 2611 | struct callchain_cursor *cursor, |
384b6055 KL |
2612 | struct perf_sample *sample, |
2613 | struct symbol **parent, | |
2614 | struct addr_location *root_al, | |
7f1d3931 KL |
2615 | int max_stack, |
2616 | unsigned int max_lbr) | |
3f067dca | 2617 | { |
ff165628 | 2618 | bool callee = (callchain_param.order == ORDER_CALLEE); |
384b6055 | 2619 | struct ip_callchain *chain = sample->callchain; |
18ef15c6 | 2620 | int chain_nr = min(max_stack, (int)chain->nr), i; |
9c6c3f47 | 2621 | struct lbr_stitch *lbr_stitch; |
ff165628 | 2622 | bool stitched_lbr = false; |
e2b23483 | 2623 | u64 branch_from = 0; |
e48b8311 | 2624 | int err; |
384b6055 KL |
2625 | |
2626 | for (i = 0; i < chain_nr; i++) { | |
2627 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
2628 | break; | |
2629 | } | |
2630 | ||
2631 | /* LBR only affects the user callchain */ | |
f8603267 KL |
2632 | if (i == chain_nr) |
2633 | return 0; | |
2634 | ||
9c6c3f47 | 2635 | if (thread->lbr_stitch_enable && !sample->no_hw_idx && |
7f1d3931 | 2636 | (max_lbr > 0) && alloc_lbr_stitch(thread, max_lbr)) { |
9c6c3f47 KL |
2637 | lbr_stitch = thread->lbr_stitch; |
2638 | ||
ff165628 KL |
2639 | stitched_lbr = has_stitched_lbr(thread, sample, |
2640 | &lbr_stitch->prev_sample, | |
2641 | max_lbr, callee); | |
2642 | ||
2643 | if (!stitched_lbr && !list_empty(&lbr_stitch->lists)) { | |
2644 | list_replace_init(&lbr_stitch->lists, | |
2645 | &lbr_stitch->free_lists); | |
2646 | } | |
9c6c3f47 KL |
2647 | memcpy(&lbr_stitch->prev_sample, sample, sizeof(*sample)); |
2648 | } | |
2649 | ||
ff165628 | 2650 | if (callee) { |
e48b8311 | 2651 | /* Add kernel ip */ |
dd3e249a KL |
2652 | err = lbr_callchain_add_kernel_ip(thread, cursor, sample, |
2653 | parent, root_al, branch_from, | |
2654 | true, i); | |
2655 | if (err) | |
2656 | goto error; | |
2657 | ||
e2b23483 KL |
2658 | err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent, |
2659 | root_al, &branch_from, true); | |
e48b8311 KL |
2660 | if (err) |
2661 | goto error; | |
384b6055 | 2662 | |
ff165628 KL |
2663 | if (stitched_lbr) { |
2664 | err = lbr_callchain_add_stitched_lbr_ip(thread, cursor); | |
2665 | if (err) | |
2666 | goto error; | |
2667 | } | |
2668 | ||
e48b8311 | 2669 | } else { |
ff165628 KL |
2670 | if (stitched_lbr) { |
2671 | err = lbr_callchain_add_stitched_lbr_ip(thread, cursor); | |
2672 | if (err) | |
2673 | goto error; | |
2674 | } | |
e2b23483 KL |
2675 | err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent, |
2676 | root_al, &branch_from, false); | |
f8603267 | 2677 | if (err) |
e48b8311 KL |
2678 | goto error; |
2679 | ||
2680 | /* Add kernel ip */ | |
dd3e249a KL |
2681 | err = lbr_callchain_add_kernel_ip(thread, cursor, sample, |
2682 | parent, root_al, branch_from, | |
2683 | false, i); | |
2684 | if (err) | |
2685 | goto error; | |
f8603267 KL |
2686 | } |
2687 | return 1; | |
e48b8311 KL |
2688 | |
2689 | error: | |
2690 | return (err < 0) ? err : 0; | |
384b6055 KL |
2691 | } |
2692 | ||
e9024d51 DM |
2693 | static int find_prev_cpumode(struct ip_callchain *chain, struct thread *thread, |
2694 | struct callchain_cursor *cursor, | |
2695 | struct symbol **parent, | |
2696 | struct addr_location *root_al, | |
2697 | u8 *cpumode, int ent) | |
2698 | { | |
2699 | int err = 0; | |
2700 | ||
2701 | while (--ent >= 0) { | |
2702 | u64 ip = chain->ips[ent]; | |
2703 | ||
2704 | if (ip >= PERF_CONTEXT_MAX) { | |
2705 | err = add_callchain_ip(thread, cursor, parent, | |
2706 | root_al, cpumode, ip, | |
2707 | false, NULL, NULL, 0); | |
2708 | break; | |
2709 | } | |
2710 | } | |
2711 | return err; | |
2712 | } | |
2713 | ||
b9f6fbb3 AT |
2714 | static u64 get_leaf_frame_caller(struct perf_sample *sample, |
2715 | struct thread *thread, int usr_idx) | |
32bfa5bf | 2716 | { |
b9f6fbb3 AT |
2717 | if (machine__normalized_is(thread->maps->machine, "arm64")) |
2718 | return get_leaf_frame_caller_aarch64(sample, thread, usr_idx); | |
2719 | else | |
2720 | return 0; | |
32bfa5bf AT |
2721 | } |
2722 | ||
384b6055 | 2723 | static int thread__resolve_callchain_sample(struct thread *thread, |
91d7b2de | 2724 | struct callchain_cursor *cursor, |
32dcd021 | 2725 | struct evsel *evsel, |
384b6055 KL |
2726 | struct perf_sample *sample, |
2727 | struct symbol **parent, | |
2728 | struct addr_location *root_al, | |
2729 | int max_stack) | |
2730 | { | |
2731 | struct branch_stack *branch = sample->branch_stack; | |
42bbabed | 2732 | struct branch_entry *entries = perf_sample__branch_entries(sample); |
384b6055 | 2733 | struct ip_callchain *chain = sample->callchain; |
b49a821e | 2734 | int chain_nr = 0; |
73dbcd65 | 2735 | u8 cpumode = PERF_RECORD_MISC_USER; |
32bfa5bf | 2736 | int i, j, err, nr_entries, usr_idx; |
8b7bad58 AK |
2737 | int skip_idx = -1; |
2738 | int first_call = 0; | |
32bfa5bf | 2739 | u64 leaf_frame_caller; |
8b7bad58 | 2740 | |
b49a821e JY |
2741 | if (chain) |
2742 | chain_nr = chain->nr; | |
2743 | ||
4f138a9e | 2744 | if (evsel__has_branch_callstack(evsel)) { |
6e6d1d65 | 2745 | struct perf_env *env = evsel__env(evsel); |
7f1d3931 | 2746 | |
91d7b2de | 2747 | err = resolve_lbr_callchain_sample(thread, cursor, sample, parent, |
7f1d3931 KL |
2748 | root_al, max_stack, |
2749 | !env ? 0 : env->max_branches); | |
384b6055 KL |
2750 | if (err) |
2751 | return (err < 0) ? err : 0; | |
2752 | } | |
2753 | ||
8b7bad58 AK |
2754 | /* |
2755 | * Based on DWARF debug information, some architectures skip | |
2756 | * a callchain entry saved by the kernel. | |
2757 | */ | |
bf8bddbf | 2758 | skip_idx = arch_skip_callchain_idx(thread, chain); |
3f067dca | 2759 | |
8b7bad58 AK |
2760 | /* |
2761 | * Add branches to call stack for easier browsing. This gives | |
2762 | * more context for a sample than just the callers. | |
2763 | * | |
2764 | * This uses individual histograms of paths compared to the | |
2765 | * aggregated histograms the normal LBR mode uses. | |
2766 | * | |
2767 | * Limitations for now: | |
2768 | * - No extra filters | |
2769 | * - No annotations (should annotate somehow) | |
2770 | */ | |
2771 | ||
2772 | if (branch && callchain_param.branch_callstack) { | |
2773 | int nr = min(max_stack, (int)branch->nr); | |
2774 | struct branch_entry be[nr]; | |
c4ee0625 | 2775 | struct iterations iter[nr]; |
8b7bad58 AK |
2776 | |
2777 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
2778 | pr_warning("corrupted branch chain. skipping...\n"); | |
2779 | goto check_calls; | |
2780 | } | |
2781 | ||
2782 | for (i = 0; i < nr; i++) { | |
2783 | if (callchain_param.order == ORDER_CALLEE) { | |
42bbabed | 2784 | be[i] = entries[i]; |
b49a821e JY |
2785 | |
2786 | if (chain == NULL) | |
2787 | continue; | |
2788 | ||
8b7bad58 AK |
2789 | /* |
2790 | * Check for overlap into the callchain. | |
2791 | * The return address is one off compared to | |
2792 | * the branch entry. To adjust for this | |
2793 | * assume the calling instruction is not longer | |
2794 | * than 8 bytes. | |
2795 | */ | |
2796 | if (i == skip_idx || | |
2797 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
2798 | first_call++; | |
2799 | else if (be[i].from < chain->ips[first_call] && | |
2800 | be[i].from >= chain->ips[first_call] - 8) | |
2801 | first_call++; | |
2802 | } else | |
42bbabed | 2803 | be[i] = entries[branch->nr - i - 1]; |
8b7bad58 AK |
2804 | } |
2805 | ||
c4ee0625 JY |
2806 | memset(iter, 0, sizeof(struct iterations) * nr); |
2807 | nr = remove_loops(be, nr, iter); | |
410024db | 2808 | |
8b7bad58 | 2809 | for (i = 0; i < nr; i++) { |
c4ee0625 JY |
2810 | err = add_callchain_ip(thread, cursor, parent, |
2811 | root_al, | |
2812 | NULL, be[i].to, | |
2813 | true, &be[i].flags, | |
2814 | NULL, be[i].from); | |
410024db | 2815 | |
8b7bad58 | 2816 | if (!err) |
91d7b2de | 2817 | err = add_callchain_ip(thread, cursor, parent, root_al, |
410024db JY |
2818 | NULL, be[i].from, |
2819 | true, &be[i].flags, | |
c4ee0625 | 2820 | &iter[i], 0); |
8b7bad58 AK |
2821 | if (err == -EINVAL) |
2822 | break; | |
2823 | if (err) | |
2824 | return err; | |
2825 | } | |
b49a821e JY |
2826 | |
2827 | if (chain_nr == 0) | |
2828 | return 0; | |
2829 | ||
8b7bad58 AK |
2830 | chain_nr -= nr; |
2831 | } | |
2832 | ||
2833 | check_calls: | |
aceb9826 | 2834 | if (chain && callchain_param.order != ORDER_CALLEE) { |
e9024d51 DM |
2835 | err = find_prev_cpumode(chain, thread, cursor, parent, root_al, |
2836 | &cpumode, chain->nr - first_call); | |
2837 | if (err) | |
2838 | return (err < 0) ? err : 0; | |
2839 | } | |
bf8bddbf | 2840 | for (i = first_call, nr_entries = 0; |
a29d5c9b | 2841 | i < chain_nr && nr_entries < max_stack; i++) { |
3f067dca | 2842 | u64 ip; |
3f067dca ACM |
2843 | |
2844 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 2845 | j = i; |
3f067dca | 2846 | else |
a60335ba SB |
2847 | j = chain->nr - i - 1; |
2848 | ||
2849 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
2850 | if (j == skip_idx) | |
2851 | continue; | |
2852 | #endif | |
2853 | ip = chain->ips[j]; | |
bf8bddbf ACM |
2854 | if (ip < PERF_CONTEXT_MAX) |
2855 | ++nr_entries; | |
e9024d51 DM |
2856 | else if (callchain_param.order != ORDER_CALLEE) { |
2857 | err = find_prev_cpumode(chain, thread, cursor, parent, | |
2858 | root_al, &cpumode, j); | |
2859 | if (err) | |
2860 | return (err < 0) ? err : 0; | |
2861 | continue; | |
2862 | } | |
a29d5c9b | 2863 | |
32bfa5bf AT |
2864 | /* |
2865 | * PERF_CONTEXT_USER allows us to locate where the user stack ends. | |
2866 | * Depending on callchain_param.order and the position of PERF_CONTEXT_USER, | |
2867 | * the index will be different in order to add the missing frame | |
2868 | * at the right place. | |
2869 | */ | |
2870 | ||
2871 | usr_idx = callchain_param.order == ORDER_CALLEE ? j-2 : j-1; | |
2872 | ||
2873 | if (usr_idx >= 0 && chain->ips[usr_idx] == PERF_CONTEXT_USER) { | |
2874 | ||
2875 | leaf_frame_caller = get_leaf_frame_caller(sample, thread, usr_idx); | |
2876 | ||
2877 | /* | |
2878 | * check if leaf_frame_Caller != ip to not add the same | |
2879 | * value twice. | |
2880 | */ | |
2881 | ||
2882 | if (leaf_frame_caller && leaf_frame_caller != ip) { | |
2883 | ||
2884 | err = add_callchain_ip(thread, cursor, parent, | |
2885 | root_al, &cpumode, leaf_frame_caller, | |
2886 | false, NULL, NULL, 0); | |
2887 | if (err) | |
2888 | return (err < 0) ? err : 0; | |
2889 | } | |
2890 | } | |
2891 | ||
410024db JY |
2892 | err = add_callchain_ip(thread, cursor, parent, |
2893 | root_al, &cpumode, ip, | |
c4ee0625 | 2894 | false, NULL, NULL, 0); |
3f067dca | 2895 | |
3f067dca | 2896 | if (err) |
2e77784b | 2897 | return (err < 0) ? err : 0; |
3f067dca ACM |
2898 | } |
2899 | ||
2900 | return 0; | |
2901 | } | |
2902 | ||
c1529738 | 2903 | static int append_inlines(struct callchain_cursor *cursor, struct map_symbol *ms, u64 ip) |
11ea2515 | 2904 | { |
c1529738 ACM |
2905 | struct symbol *sym = ms->sym; |
2906 | struct map *map = ms->map; | |
11ea2515 MW |
2907 | struct inline_node *inline_node; |
2908 | struct inline_list *ilist; | |
2909 | u64 addr; | |
b38775cf | 2910 | int ret = 1; |
11ea2515 MW |
2911 | |
2912 | if (!symbol_conf.inline_name || !map || !sym) | |
b38775cf | 2913 | return ret; |
11ea2515 | 2914 | |
7a8a8fcf MW |
2915 | addr = map__map_ip(map, ip); |
2916 | addr = map__rip_2objdump(map, addr); | |
11ea2515 MW |
2917 | |
2918 | inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr); | |
2919 | if (!inline_node) { | |
2920 | inline_node = dso__parse_addr_inlines(map->dso, addr, sym); | |
2921 | if (!inline_node) | |
b38775cf | 2922 | return ret; |
11ea2515 MW |
2923 | inlines__tree_insert(&map->dso->inlined_nodes, inline_node); |
2924 | } | |
2925 | ||
2926 | list_for_each_entry(ilist, &inline_node->val, list) { | |
5f0fef8a | 2927 | struct map_symbol ilist_ms = { |
77b91c1a | 2928 | .maps = ms->maps, |
5f0fef8a ACM |
2929 | .map = map, |
2930 | .sym = ilist->symbol, | |
2931 | }; | |
2932 | ret = callchain_cursor_append(cursor, ip, &ilist_ms, false, | |
b38775cf | 2933 | NULL, 0, 0, 0, ilist->srcline); |
11ea2515 MW |
2934 | |
2935 | if (ret != 0) | |
2936 | return ret; | |
2937 | } | |
2938 | ||
b38775cf | 2939 | return ret; |
11ea2515 MW |
2940 | } |
2941 | ||
3f067dca ACM |
2942 | static int unwind_entry(struct unwind_entry *entry, void *arg) |
2943 | { | |
2944 | struct callchain_cursor *cursor = arg; | |
40a342cd | 2945 | const char *srcline = NULL; |
ff4ce288 | 2946 | u64 addr = entry->ip; |
b49a8fe5 | 2947 | |
c1529738 | 2948 | if (symbol_conf.hide_unresolved && entry->ms.sym == NULL) |
b49a8fe5 | 2949 | return 0; |
40a342cd | 2950 | |
c1529738 | 2951 | if (append_inlines(cursor, &entry->ms, entry->ip) == 0) |
11ea2515 MW |
2952 | return 0; |
2953 | ||
2a9d5050 SD |
2954 | /* |
2955 | * Convert entry->ip from a virtual address to an offset in | |
2956 | * its corresponding binary. | |
2957 | */ | |
c1529738 ACM |
2958 | if (entry->ms.map) |
2959 | addr = map__map_ip(entry->ms.map, entry->ip); | |
2a9d5050 | 2960 | |
5f0fef8a ACM |
2961 | srcline = callchain_srcline(&entry->ms, addr); |
2962 | return callchain_cursor_append(cursor, entry->ip, &entry->ms, | |
40a342cd | 2963 | false, NULL, 0, 0, 0, srcline); |
3f067dca ACM |
2964 | } |
2965 | ||
9919a65e CP |
2966 | static int thread__resolve_callchain_unwind(struct thread *thread, |
2967 | struct callchain_cursor *cursor, | |
32dcd021 | 2968 | struct evsel *evsel, |
9919a65e CP |
2969 | struct perf_sample *sample, |
2970 | int max_stack) | |
3f067dca | 2971 | { |
3f067dca | 2972 | /* Can we do dwarf post unwind? */ |
1fc632ce JO |
2973 | if (!((evsel->core.attr.sample_type & PERF_SAMPLE_REGS_USER) && |
2974 | (evsel->core.attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
3f067dca ACM |
2975 | return 0; |
2976 | ||
2977 | /* Bail out if nothing was captured. */ | |
2978 | if ((!sample->user_regs.regs) || | |
2979 | (!sample->user_stack.size)) | |
2980 | return 0; | |
2981 | ||
91d7b2de | 2982 | return unwind__get_entries(unwind_entry, cursor, |
352ea45a | 2983 | thread, sample, max_stack); |
9919a65e | 2984 | } |
3f067dca | 2985 | |
9919a65e CP |
2986 | int thread__resolve_callchain(struct thread *thread, |
2987 | struct callchain_cursor *cursor, | |
32dcd021 | 2988 | struct evsel *evsel, |
9919a65e CP |
2989 | struct perf_sample *sample, |
2990 | struct symbol **parent, | |
2991 | struct addr_location *root_al, | |
2992 | int max_stack) | |
2993 | { | |
2994 | int ret = 0; | |
2995 | ||
914eb9ca | 2996 | callchain_cursor_reset(cursor); |
9919a65e CP |
2997 | |
2998 | if (callchain_param.order == ORDER_CALLEE) { | |
2999 | ret = thread__resolve_callchain_sample(thread, cursor, | |
3000 | evsel, sample, | |
3001 | parent, root_al, | |
3002 | max_stack); | |
3003 | if (ret) | |
3004 | return ret; | |
3005 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
3006 | evsel, sample, | |
3007 | max_stack); | |
3008 | } else { | |
3009 | ret = thread__resolve_callchain_unwind(thread, cursor, | |
3010 | evsel, sample, | |
3011 | max_stack); | |
3012 | if (ret) | |
3013 | return ret; | |
3014 | ret = thread__resolve_callchain_sample(thread, cursor, | |
3015 | evsel, sample, | |
3016 | parent, root_al, | |
3017 | max_stack); | |
3018 | } | |
3019 | ||
3020 | return ret; | |
3f067dca | 3021 | } |
35feee19 DA |
3022 | |
3023 | int machine__for_each_thread(struct machine *machine, | |
3024 | int (*fn)(struct thread *thread, void *p), | |
3025 | void *priv) | |
3026 | { | |
91e467bc | 3027 | struct threads *threads; |
35feee19 DA |
3028 | struct rb_node *nd; |
3029 | struct thread *thread; | |
3030 | int rc = 0; | |
91e467bc | 3031 | int i; |
35feee19 | 3032 | |
91e467bc KL |
3033 | for (i = 0; i < THREADS__TABLE_SIZE; i++) { |
3034 | threads = &machine->threads[i]; | |
f3acb3a8 DB |
3035 | for (nd = rb_first_cached(&threads->entries); nd; |
3036 | nd = rb_next(nd)) { | |
91e467bc KL |
3037 | thread = rb_entry(nd, struct thread, rb_node); |
3038 | rc = fn(thread, priv); | |
3039 | if (rc != 0) | |
3040 | return rc; | |
3041 | } | |
35feee19 | 3042 | |
91e467bc KL |
3043 | list_for_each_entry(thread, &threads->dead, node) { |
3044 | rc = fn(thread, priv); | |
3045 | if (rc != 0) | |
3046 | return rc; | |
3047 | } | |
35feee19 DA |
3048 | } |
3049 | return rc; | |
3050 | } | |
58d925dc | 3051 | |
a5499b37 AH |
3052 | int machines__for_each_thread(struct machines *machines, |
3053 | int (*fn)(struct thread *thread, void *p), | |
3054 | void *priv) | |
3055 | { | |
3056 | struct rb_node *nd; | |
3057 | int rc = 0; | |
3058 | ||
3059 | rc = machine__for_each_thread(&machines->host, fn, priv); | |
3060 | if (rc != 0) | |
3061 | return rc; | |
3062 | ||
f3acb3a8 | 3063 | for (nd = rb_first_cached(&machines->guests); nd; nd = rb_next(nd)) { |
a5499b37 AH |
3064 | struct machine *machine = rb_entry(nd, struct machine, rb_node); |
3065 | ||
3066 | rc = machine__for_each_thread(machine, fn, priv); | |
3067 | if (rc != 0) | |
3068 | return rc; | |
3069 | } | |
3070 | return rc; | |
3071 | } | |
3072 | ||
b9d266ba AH |
3073 | pid_t machine__get_current_tid(struct machine *machine, int cpu) |
3074 | { | |
5501e922 | 3075 | int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS); |
8c727469 KM |
3076 | |
3077 | if (cpu < 0 || cpu >= nr_cpus || !machine->current_tid) | |
b9d266ba AH |
3078 | return -1; |
3079 | ||
3080 | return machine->current_tid[cpu]; | |
3081 | } | |
3082 | ||
3083 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
3084 | pid_t tid) | |
3085 | { | |
3086 | struct thread *thread; | |
5501e922 | 3087 | int nr_cpus = min(machine->env->nr_cpus_avail, MAX_NR_CPUS); |
b9d266ba AH |
3088 | |
3089 | if (cpu < 0) | |
3090 | return -EINVAL; | |
3091 | ||
3092 | if (!machine->current_tid) { | |
3093 | int i; | |
3094 | ||
8c727469 | 3095 | machine->current_tid = calloc(nr_cpus, sizeof(pid_t)); |
b9d266ba AH |
3096 | if (!machine->current_tid) |
3097 | return -ENOMEM; | |
8c727469 | 3098 | for (i = 0; i < nr_cpus; i++) |
b9d266ba AH |
3099 | machine->current_tid[i] = -1; |
3100 | } | |
3101 | ||
8c727469 | 3102 | if (cpu >= nr_cpus) { |
b9d266ba AH |
3103 | pr_err("Requested CPU %d too large. ", cpu); |
3104 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
3105 | return -EINVAL; | |
3106 | } | |
3107 | ||
3108 | machine->current_tid[cpu] = tid; | |
3109 | ||
3110 | thread = machine__findnew_thread(machine, pid, tid); | |
3111 | if (!thread) | |
3112 | return -ENOMEM; | |
3113 | ||
3114 | thread->cpu = cpu; | |
b91fc39f | 3115 | thread__put(thread); |
b9d266ba AH |
3116 | |
3117 | return 0; | |
3118 | } | |
fbe2af45 | 3119 | |
dbbd34a6 | 3120 | /* |
b9f6fbb3 AT |
3121 | * Compares the raw arch string. N.B. see instead perf_env__arch() or |
3122 | * machine__normalized_is() if a normalized arch is needed. | |
dbbd34a6 AH |
3123 | */ |
3124 | bool machine__is(struct machine *machine, const char *arch) | |
3125 | { | |
3126 | return machine && !strcmp(perf_env__raw_arch(machine->env), arch); | |
3127 | } | |
3128 | ||
b9f6fbb3 AT |
3129 | bool machine__normalized_is(struct machine *machine, const char *arch) |
3130 | { | |
3131 | return machine && !strcmp(perf_env__arch(machine->env), arch); | |
3132 | } | |
3133 | ||
9cecca32 AH |
3134 | int machine__nr_cpus_avail(struct machine *machine) |
3135 | { | |
3136 | return machine ? perf_env__nr_cpus_avail(machine->env) : 0; | |
3137 | } | |
3138 | ||
fbe2af45 AH |
3139 | int machine__get_kernel_start(struct machine *machine) |
3140 | { | |
a5e813c6 | 3141 | struct map *map = machine__kernel_map(machine); |
fbe2af45 AH |
3142 | int err = 0; |
3143 | ||
3144 | /* | |
3145 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
3146 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
3147 | * all addresses including kernel addresses are less than 2^32. In | |
3148 | * that case (32-bit system), if the kernel mapping is unknown, all | |
3149 | * addresses will be assumed to be in user space - see | |
3150 | * machine__kernel_ip(). | |
3151 | */ | |
3152 | machine->kernel_start = 1ULL << 63; | |
3153 | if (map) { | |
be39db9f | 3154 | err = map__load(map); |
19422a9f AH |
3155 | /* |
3156 | * On x86_64, PTI entry trampolines are less than the | |
3157 | * start of kernel text, but still above 2^63. So leave | |
3158 | * kernel_start = 1ULL << 63 for x86_64. | |
3159 | */ | |
3160 | if (!err && !machine__is(machine, "x86_64")) | |
fbe2af45 AH |
3161 | machine->kernel_start = map->start; |
3162 | } | |
3163 | return err; | |
3164 | } | |
aa7cc2ae | 3165 | |
8e80ad99 AH |
3166 | u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr) |
3167 | { | |
3168 | u8 addr_cpumode = cpumode; | |
3169 | bool kernel_ip; | |
3170 | ||
3171 | if (!machine->single_address_space) | |
3172 | goto out; | |
3173 | ||
3174 | kernel_ip = machine__kernel_ip(machine, addr); | |
3175 | switch (cpumode) { | |
3176 | case PERF_RECORD_MISC_KERNEL: | |
3177 | case PERF_RECORD_MISC_USER: | |
3178 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_KERNEL : | |
3179 | PERF_RECORD_MISC_USER; | |
3180 | break; | |
3181 | case PERF_RECORD_MISC_GUEST_KERNEL: | |
3182 | case PERF_RECORD_MISC_GUEST_USER: | |
3183 | addr_cpumode = kernel_ip ? PERF_RECORD_MISC_GUEST_KERNEL : | |
3184 | PERF_RECORD_MISC_GUEST_USER; | |
3185 | break; | |
3186 | default: | |
3187 | break; | |
3188 | } | |
3189 | out: | |
3190 | return addr_cpumode; | |
3191 | } | |
3192 | ||
0e3149f8 ACM |
3193 | struct dso *machine__findnew_dso_id(struct machine *machine, const char *filename, struct dso_id *id) |
3194 | { | |
3195 | return dsos__findnew_id(&machine->dsos, filename, id); | |
3196 | } | |
3197 | ||
aa7cc2ae ACM |
3198 | struct dso *machine__findnew_dso(struct machine *machine, const char *filename) |
3199 | { | |
0e3149f8 | 3200 | return machine__findnew_dso_id(machine, filename, NULL); |
aa7cc2ae | 3201 | } |
c3168b0d ACM |
3202 | |
3203 | char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) | |
3204 | { | |
3205 | struct machine *machine = vmachine; | |
3206 | struct map *map; | |
107cad95 | 3207 | struct symbol *sym = machine__find_kernel_symbol(machine, *addrp, &map); |
c3168b0d ACM |
3208 | |
3209 | if (sym == NULL) | |
3210 | return NULL; | |
3211 | ||
3212 | *modp = __map__is_kmodule(map) ? (char *)map->dso->short_name : NULL; | |
3213 | *addrp = map->unmap_ip(map, sym->start); | |
3214 | return sym->name; | |
3215 | } | |
c57f5eaa JO |
3216 | |
3217 | int machine__for_each_dso(struct machine *machine, machine__dso_t fn, void *priv) | |
3218 | { | |
3219 | struct dso *pos; | |
3220 | int err = 0; | |
3221 | ||
3222 | list_for_each_entry(pos, &machine->dsos.head, node) { | |
3223 | if (fn(pos, machine, priv)) | |
3224 | err = -1; | |
3225 | } | |
3226 | return err; | |
3227 | } |