blob: 15dd0a9691ceea7efe0d091b43aa0c46b191061d [file] [log] [blame]
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001#include "callchain.h"
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03002#include "debug.h"
3#include "event.h"
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03004#include "evsel.h"
5#include "hist.h"
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -03006#include "machine.h"
7#include "map.h"
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03008#include "sort.h"
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -03009#include "strlist.h"
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -030010#include "thread.h"
Adrian Hunterd027b642014-07-23 14:23:00 +030011#include "vdso.h"
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -030012#include <stdbool.h>
Arnaldo Carvalho de Meloc506c962013-12-11 09:15:00 -030013#include <symbol/kallsyms.h>
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -030014#include "unwind.h"
Andi Kleen8b7bad52014-11-12 18:05:20 -080015#include "linux/hash.h"
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -030016
Arnaldo Carvalho de Meloe167f992014-10-14 15:07:48 -030017static void dsos__init(struct dsos *dsos)
18{
19 INIT_LIST_HEAD(&dsos->head);
20 dsos->root = RB_ROOT;
21}
22
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030023int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
24{
Arnaldo Carvalho de Melo11246c72014-10-21 17:29:02 -030025 map_groups__init(&machine->kmaps, machine);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030026 RB_CLEAR_NODE(&machine->rb_node);
Arnaldo Carvalho de Meloe167f992014-10-14 15:07:48 -030027 dsos__init(&machine->user_dsos);
28 dsos__init(&machine->kernel_dsos);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030029
30 machine->threads = RB_ROOT;
31 INIT_LIST_HEAD(&machine->dead_threads);
32 machine->last_match = NULL;
33
Adrian Hunterd027b642014-07-23 14:23:00 +030034 machine->vdso_info = NULL;
35
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030036 machine->pid = pid;
37
Adrian Hunter611a5ce2013-08-08 14:32:20 +030038 machine->symbol_filter = NULL;
Jiri Olsa14bd6d22014-01-07 13:47:19 +010039 machine->id_hdr_size = 0;
Adrian Huntercfe1c412014-07-31 09:00:45 +030040 machine->comm_exec = false;
Adrian Hunterfbe2af42014-08-15 22:08:39 +030041 machine->kernel_start = 0;
Adrian Hunter611a5ce2013-08-08 14:32:20 +030042
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030043 machine->root_dir = strdup(root_dir);
44 if (machine->root_dir == NULL)
45 return -ENOMEM;
46
47 if (pid != HOST_KERNEL_ID) {
Adrian Hunter1fcb8762014-07-14 13:02:25 +030048 struct thread *thread = machine__findnew_thread(machine, -1,
Adrian Hunter314add62013-08-27 11:23:03 +030049 pid);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030050 char comm[64];
51
52 if (thread == NULL)
53 return -ENOMEM;
54
55 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
Frederic Weisbecker162f0be2013-09-11 16:18:24 +020056 thread__set_comm(thread, comm, 0);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030057 }
58
Adrian Hunterb9d266b2014-07-22 16:17:25 +030059 machine->current_tid = NULL;
60
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030061 return 0;
62}
63
David Ahern8fb598e2013-09-28 13:13:00 -060064struct machine *machine__new_host(void)
65{
66 struct machine *machine = malloc(sizeof(*machine));
67
68 if (machine != NULL) {
69 machine__init(machine, "", HOST_KERNEL_ID);
70
71 if (machine__create_kernel_maps(machine) < 0)
72 goto out_delete;
73 }
74
75 return machine;
76out_delete:
77 free(machine);
78 return NULL;
79}
80
Waiman Long8fa7d872014-09-29 16:07:28 -040081static void dsos__delete(struct dsos *dsos)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030082{
83 struct dso *pos, *n;
84
Waiman Long8fa7d872014-09-29 16:07:28 -040085 list_for_each_entry_safe(pos, n, &dsos->head, node) {
Waiman Long4598a0a2014-09-30 13:36:15 -040086 RB_CLEAR_NODE(&pos->rb_node);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030087 list_del(&pos->node);
88 dso__delete(pos);
89 }
90}
91
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -030092void machine__delete_dead_threads(struct machine *machine)
93{
94 struct thread *n, *t;
95
96 list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
97 list_del(&t->node);
98 thread__delete(t);
99 }
100}
101
102void machine__delete_threads(struct machine *machine)
103{
104 struct rb_node *nd = rb_first(&machine->threads);
105
106 while (nd) {
107 struct thread *t = rb_entry(nd, struct thread, rb_node);
108
109 rb_erase(&t->rb_node, &machine->threads);
110 nd = rb_next(nd);
111 thread__delete(t);
112 }
113}
114
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300115void machine__exit(struct machine *machine)
116{
117 map_groups__exit(&machine->kmaps);
118 dsos__delete(&machine->user_dsos);
119 dsos__delete(&machine->kernel_dsos);
Adrian Hunterd027b642014-07-23 14:23:00 +0300120 vdso__exit(machine);
Arnaldo Carvalho de Melo04662522013-12-26 17:41:15 -0300121 zfree(&machine->root_dir);
Adrian Hunterb9d266b2014-07-22 16:17:25 +0300122 zfree(&machine->current_tid);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300123}
124
125void machine__delete(struct machine *machine)
126{
127 machine__exit(machine);
128 free(machine);
129}
130
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300131void machines__init(struct machines *machines)
132{
133 machine__init(&machines->host, "", HOST_KERNEL_ID);
134 machines->guests = RB_ROOT;
Adrian Hunter611a5ce2013-08-08 14:32:20 +0300135 machines->symbol_filter = NULL;
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300136}
137
138void machines__exit(struct machines *machines)
139{
140 machine__exit(&machines->host);
141 /* XXX exit guest */
142}
143
144struct machine *machines__add(struct machines *machines, pid_t pid,
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300145 const char *root_dir)
146{
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300147 struct rb_node **p = &machines->guests.rb_node;
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300148 struct rb_node *parent = NULL;
149 struct machine *pos, *machine = malloc(sizeof(*machine));
150
151 if (machine == NULL)
152 return NULL;
153
154 if (machine__init(machine, root_dir, pid) != 0) {
155 free(machine);
156 return NULL;
157 }
158
Adrian Hunter611a5ce2013-08-08 14:32:20 +0300159 machine->symbol_filter = machines->symbol_filter;
160
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300161 while (*p != NULL) {
162 parent = *p;
163 pos = rb_entry(parent, struct machine, rb_node);
164 if (pid < pos->pid)
165 p = &(*p)->rb_left;
166 else
167 p = &(*p)->rb_right;
168 }
169
170 rb_link_node(&machine->rb_node, parent, p);
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300171 rb_insert_color(&machine->rb_node, &machines->guests);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300172
173 return machine;
174}
175
Adrian Hunter611a5ce2013-08-08 14:32:20 +0300176void machines__set_symbol_filter(struct machines *machines,
177 symbol_filter_t symbol_filter)
178{
179 struct rb_node *nd;
180
181 machines->symbol_filter = symbol_filter;
182 machines->host.symbol_filter = symbol_filter;
183
184 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
185 struct machine *machine = rb_entry(nd, struct machine, rb_node);
186
187 machine->symbol_filter = symbol_filter;
188 }
189}
190
Adrian Huntercfe1c412014-07-31 09:00:45 +0300191void machines__set_comm_exec(struct machines *machines, bool comm_exec)
192{
193 struct rb_node *nd;
194
195 machines->host.comm_exec = comm_exec;
196
197 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
198 struct machine *machine = rb_entry(nd, struct machine, rb_node);
199
200 machine->comm_exec = comm_exec;
201 }
202}
203
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300204struct machine *machines__find(struct machines *machines, pid_t pid)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300205{
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300206 struct rb_node **p = &machines->guests.rb_node;
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300207 struct rb_node *parent = NULL;
208 struct machine *machine;
209 struct machine *default_machine = NULL;
210
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300211 if (pid == HOST_KERNEL_ID)
212 return &machines->host;
213
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300214 while (*p != NULL) {
215 parent = *p;
216 machine = rb_entry(parent, struct machine, rb_node);
217 if (pid < machine->pid)
218 p = &(*p)->rb_left;
219 else if (pid > machine->pid)
220 p = &(*p)->rb_right;
221 else
222 return machine;
223 if (!machine->pid)
224 default_machine = machine;
225 }
226
227 return default_machine;
228}
229
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300230struct machine *machines__findnew(struct machines *machines, pid_t pid)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300231{
232 char path[PATH_MAX];
233 const char *root_dir = "";
234 struct machine *machine = machines__find(machines, pid);
235
236 if (machine && (machine->pid == pid))
237 goto out;
238
239 if ((pid != HOST_KERNEL_ID) &&
240 (pid != DEFAULT_GUEST_KERNEL_ID) &&
241 (symbol_conf.guestmount)) {
242 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
243 if (access(path, R_OK)) {
244 static struct strlist *seen;
245
246 if (!seen)
247 seen = strlist__new(true, NULL);
248
249 if (!strlist__has_entry(seen, path)) {
250 pr_err("Can't access file %s\n", path);
251 strlist__add(seen, path);
252 }
253 machine = NULL;
254 goto out;
255 }
256 root_dir = path;
257 }
258
259 machine = machines__add(machines, pid, root_dir);
260out:
261 return machine;
262}
263
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300264void machines__process_guests(struct machines *machines,
265 machine__process_t process, void *data)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300266{
267 struct rb_node *nd;
268
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300269 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300270 struct machine *pos = rb_entry(nd, struct machine, rb_node);
271 process(pos, data);
272 }
273}
274
275char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
276{
277 if (machine__is_host(machine))
278 snprintf(bf, size, "[%s]", "kernel.kallsyms");
279 else if (machine__is_default_guest(machine))
280 snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
281 else {
282 snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
283 machine->pid);
284 }
285
286 return bf;
287}
288
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300289void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300290{
291 struct rb_node *node;
292 struct machine *machine;
293
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300294 machines->host.id_hdr_size = id_hdr_size;
295
296 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300297 machine = rb_entry(node, struct machine, rb_node);
298 machine->id_hdr_size = id_hdr_size;
299 }
300
301 return;
302}
303
Adrian Hunter29ce3612014-07-16 11:07:13 +0300304static void machine__update_thread_pid(struct machine *machine,
305 struct thread *th, pid_t pid)
306{
307 struct thread *leader;
308
309 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
310 return;
311
312 th->pid_ = pid;
313
314 if (th->pid_ == th->tid)
315 return;
316
317 leader = machine__findnew_thread(machine, th->pid_, th->pid_);
318 if (!leader)
319 goto out_err;
320
321 if (!leader->mg)
Arnaldo Carvalho de Melo11246c72014-10-21 17:29:02 -0300322 leader->mg = map_groups__new(machine);
Adrian Hunter29ce3612014-07-16 11:07:13 +0300323
324 if (!leader->mg)
325 goto out_err;
326
327 if (th->mg == leader->mg)
328 return;
329
330 if (th->mg) {
331 /*
332 * Maps are created from MMAP events which provide the pid and
333 * tid. Consequently there never should be any maps on a thread
334 * with an unknown pid. Just print an error if there are.
335 */
336 if (!map_groups__empty(th->mg))
337 pr_err("Discarding thread maps for %d:%d\n",
338 th->pid_, th->tid);
339 map_groups__delete(th->mg);
340 }
341
342 th->mg = map_groups__get(leader->mg);
343
344 return;
345
346out_err:
347 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
348}
349
Adrian Hunter99d725f2013-08-26 16:00:19 +0300350static struct thread *__machine__findnew_thread(struct machine *machine,
351 pid_t pid, pid_t tid,
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300352 bool create)
353{
354 struct rb_node **p = &machine->threads.rb_node;
355 struct rb_node *parent = NULL;
356 struct thread *th;
357
358 /*
Adrian Hunter38051232013-07-04 16:20:31 +0300359 * Front-end cache - TID lookups come in blocks,
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300360 * so most of the time we dont have to look up
361 * the full rbtree:
362 */
Adrian Hunter29ce3612014-07-16 11:07:13 +0300363 th = machine->last_match;
364 if (th && th->tid == tid) {
365 machine__update_thread_pid(machine, th, pid);
366 return th;
Adrian Hunter99d725f2013-08-26 16:00:19 +0300367 }
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300368
369 while (*p != NULL) {
370 parent = *p;
371 th = rb_entry(parent, struct thread, rb_node);
372
Adrian Hunter38051232013-07-04 16:20:31 +0300373 if (th->tid == tid) {
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300374 machine->last_match = th;
Adrian Hunter29ce3612014-07-16 11:07:13 +0300375 machine__update_thread_pid(machine, th, pid);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300376 return th;
377 }
378
Adrian Hunter38051232013-07-04 16:20:31 +0300379 if (tid < th->tid)
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300380 p = &(*p)->rb_left;
381 else
382 p = &(*p)->rb_right;
383 }
384
385 if (!create)
386 return NULL;
387
Adrian Hunter99d725f2013-08-26 16:00:19 +0300388 th = thread__new(pid, tid);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300389 if (th != NULL) {
390 rb_link_node(&th->rb_node, parent, p);
391 rb_insert_color(&th->rb_node, &machine->threads);
392 machine->last_match = th;
Jiri Olsacddcef62014-04-09 20:54:29 +0200393
394 /*
395 * We have to initialize map_groups separately
396 * after rb tree is updated.
397 *
398 * The reason is that we call machine__findnew_thread
399 * within thread__init_map_groups to find the thread
400 * leader and that would screwed the rb tree.
401 */
Adrian Hunter418029b2014-07-16 10:19:44 +0300402 if (thread__init_map_groups(th, machine)) {
403 thread__delete(th);
Jiri Olsacddcef62014-04-09 20:54:29 +0200404 return NULL;
Adrian Hunter418029b2014-07-16 10:19:44 +0300405 }
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300406 }
407
408 return th;
409}
410
Adrian Hunter314add62013-08-27 11:23:03 +0300411struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
412 pid_t tid)
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300413{
Adrian Hunter314add62013-08-27 11:23:03 +0300414 return __machine__findnew_thread(machine, pid, tid, true);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300415}
416
Jiri Olsad75e6092014-03-14 15:00:03 +0100417struct thread *machine__find_thread(struct machine *machine, pid_t pid,
418 pid_t tid)
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300419{
Jiri Olsad75e6092014-03-14 15:00:03 +0100420 return __machine__findnew_thread(machine, pid, tid, false);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300421}
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300422
Adrian Huntercfe1c412014-07-31 09:00:45 +0300423struct comm *machine__thread_exec_comm(struct machine *machine,
424 struct thread *thread)
425{
426 if (machine->comm_exec)
427 return thread__exec_comm(thread);
428 else
429 return thread__comm(thread);
430}
431
Frederic Weisbecker162f0be2013-09-11 16:18:24 +0200432int machine__process_comm_event(struct machine *machine, union perf_event *event,
433 struct perf_sample *sample)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300434{
Adrian Hunter314add62013-08-27 11:23:03 +0300435 struct thread *thread = machine__findnew_thread(machine,
436 event->comm.pid,
437 event->comm.tid);
Adrian Hunter65de51f2014-07-31 09:00:44 +0300438 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300439
Adrian Huntercfe1c412014-07-31 09:00:45 +0300440 if (exec)
441 machine->comm_exec = true;
442
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300443 if (dump_trace)
444 perf_event__fprintf_comm(event, stdout);
445
Adrian Hunter65de51f2014-07-31 09:00:44 +0300446 if (thread == NULL ||
447 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300448 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
449 return -1;
450 }
451
452 return 0;
453}
454
455int machine__process_lost_event(struct machine *machine __maybe_unused,
Frederic Weisbecker162f0be2013-09-11 16:18:24 +0200456 union perf_event *event, struct perf_sample *sample __maybe_unused)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300457{
458 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
459 event->lost.id, event->lost.lost);
460 return 0;
461}
462
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300463struct map *machine__new_module(struct machine *machine, u64 start,
464 const char *filename)
465{
466 struct map *map;
467 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
Namhyung Kimc00c48f2014-11-04 10:14:27 +0900468 bool compressed;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300469
470 if (dso == NULL)
471 return NULL;
472
473 map = map__new2(start, dso, MAP__FUNCTION);
474 if (map == NULL)
475 return NULL;
476
477 if (machine__is_host(machine))
478 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
479 else
480 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
Namhyung Kimc00c48f2014-11-04 10:14:27 +0900481
482 /* _KMODULE_COMP should be next to _KMODULE */
483 if (is_kernel_module(filename, &compressed) && compressed)
484 dso->symtab_type++;
485
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300486 map_groups__insert(&machine->kmaps, map);
487 return map;
488}
489
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300490size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300491{
492 struct rb_node *nd;
Waiman Long8fa7d872014-09-29 16:07:28 -0400493 size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) +
494 __dsos__fprintf(&machines->host.user_dsos.head, fp);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300495
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300496 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300497 struct machine *pos = rb_entry(nd, struct machine, rb_node);
Waiman Long8fa7d872014-09-29 16:07:28 -0400498 ret += __dsos__fprintf(&pos->kernel_dsos.head, fp);
499 ret += __dsos__fprintf(&pos->user_dsos.head, fp);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300500 }
501
502 return ret;
503}
504
Waiman Long8fa7d872014-09-29 16:07:28 -0400505size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300506 bool (skip)(struct dso *dso, int parm), int parm)
507{
Waiman Long8fa7d872014-09-29 16:07:28 -0400508 return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) +
509 __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300510}
511
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300512size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300513 bool (skip)(struct dso *dso, int parm), int parm)
514{
515 struct rb_node *nd;
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300516 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300517
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300518 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300519 struct machine *pos = rb_entry(nd, struct machine, rb_node);
520 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
521 }
522 return ret;
523}
524
525size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
526{
527 int i;
528 size_t printed = 0;
529 struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso;
530
531 if (kdso->has_build_id) {
532 char filename[PATH_MAX];
533 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
534 printed += fprintf(fp, "[0] %s\n", filename);
535 }
536
537 for (i = 0; i < vmlinux_path__nr_entries; ++i)
538 printed += fprintf(fp, "[%d] %s\n",
539 i + kdso->has_build_id, vmlinux_path[i]);
540
541 return printed;
542}
543
544size_t machine__fprintf(struct machine *machine, FILE *fp)
545{
546 size_t ret = 0;
547 struct rb_node *nd;
548
549 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
550 struct thread *pos = rb_entry(nd, struct thread, rb_node);
551
552 ret += thread__fprintf(pos, fp);
553 }
554
555 return ret;
556}
557
558static struct dso *machine__get_kernel(struct machine *machine)
559{
560 const char *vmlinux_name = NULL;
561 struct dso *kernel;
562
563 if (machine__is_host(machine)) {
564 vmlinux_name = symbol_conf.vmlinux_name;
565 if (!vmlinux_name)
566 vmlinux_name = "[kernel.kallsyms]";
567
568 kernel = dso__kernel_findnew(machine, vmlinux_name,
569 "[kernel]",
570 DSO_TYPE_KERNEL);
571 } else {
572 char bf[PATH_MAX];
573
574 if (machine__is_default_guest(machine))
575 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
576 if (!vmlinux_name)
577 vmlinux_name = machine__mmap_name(machine, bf,
578 sizeof(bf));
579
580 kernel = dso__kernel_findnew(machine, vmlinux_name,
581 "[guest.kernel]",
582 DSO_TYPE_GUEST_KERNEL);
583 }
584
585 if (kernel != NULL && (!kernel->has_build_id))
586 dso__read_running_kernel_build_id(kernel, machine);
587
588 return kernel;
589}
590
591struct process_args {
592 u64 start;
593};
594
Adrian Hunter15a0a872014-01-29 16:14:38 +0200595static void machine__get_kallsyms_filename(struct machine *machine, char *buf,
596 size_t bufsz)
597{
598 if (machine__is_default_guest(machine))
599 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
600 else
601 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
602}
603
Simon Quea93f0e52014-06-16 11:32:09 -0700604const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
605
606/* Figure out the start address of kernel map from /proc/kallsyms.
607 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
608 * symbol_name if it's not that important.
609 */
Adrian Hunter4b993752014-08-15 22:08:38 +0300610static u64 machine__get_running_kernel_start(struct machine *machine,
611 const char **symbol_name)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300612{
Adrian Hunter15a0a872014-01-29 16:14:38 +0200613 char filename[PATH_MAX];
Simon Quea93f0e52014-06-16 11:32:09 -0700614 int i;
615 const char *name;
616 u64 addr = 0;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300617
Adrian Hunter15a0a872014-01-29 16:14:38 +0200618 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300619
620 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
621 return 0;
622
Simon Quea93f0e52014-06-16 11:32:09 -0700623 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
624 addr = kallsyms__get_function_start(filename, name);
625 if (addr)
626 break;
627 }
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300628
Simon Quea93f0e52014-06-16 11:32:09 -0700629 if (symbol_name)
630 *symbol_name = name;
631
632 return addr;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300633}
634
635int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
636{
637 enum map_type type;
Adrian Hunter4b993752014-08-15 22:08:38 +0300638 u64 start = machine__get_running_kernel_start(machine, NULL);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300639
640 for (type = 0; type < MAP__NR_TYPES; ++type) {
641 struct kmap *kmap;
642
643 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
644 if (machine->vmlinux_maps[type] == NULL)
645 return -1;
646
647 machine->vmlinux_maps[type]->map_ip =
648 machine->vmlinux_maps[type]->unmap_ip =
649 identity__map_ip;
650 kmap = map__kmap(machine->vmlinux_maps[type]);
651 kmap->kmaps = &machine->kmaps;
652 map_groups__insert(&machine->kmaps,
653 machine->vmlinux_maps[type]);
654 }
655
656 return 0;
657}
658
659void machine__destroy_kernel_maps(struct machine *machine)
660{
661 enum map_type type;
662
663 for (type = 0; type < MAP__NR_TYPES; ++type) {
664 struct kmap *kmap;
665
666 if (machine->vmlinux_maps[type] == NULL)
667 continue;
668
669 kmap = map__kmap(machine->vmlinux_maps[type]);
670 map_groups__remove(&machine->kmaps,
671 machine->vmlinux_maps[type]);
672 if (kmap->ref_reloc_sym) {
673 /*
674 * ref_reloc_sym is shared among all maps, so free just
675 * on one of them.
676 */
677 if (type == MAP__FUNCTION) {
Arnaldo Carvalho de Melo04662522013-12-26 17:41:15 -0300678 zfree((char **)&kmap->ref_reloc_sym->name);
679 zfree(&kmap->ref_reloc_sym);
680 } else
681 kmap->ref_reloc_sym = NULL;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300682 }
683
684 map__delete(machine->vmlinux_maps[type]);
685 machine->vmlinux_maps[type] = NULL;
686 }
687}
688
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300689int machines__create_guest_kernel_maps(struct machines *machines)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300690{
691 int ret = 0;
692 struct dirent **namelist = NULL;
693 int i, items = 0;
694 char path[PATH_MAX];
695 pid_t pid;
696 char *endp;
697
698 if (symbol_conf.default_guest_vmlinux_name ||
699 symbol_conf.default_guest_modules ||
700 symbol_conf.default_guest_kallsyms) {
701 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
702 }
703
704 if (symbol_conf.guestmount) {
705 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
706 if (items <= 0)
707 return -ENOENT;
708 for (i = 0; i < items; i++) {
709 if (!isdigit(namelist[i]->d_name[0])) {
710 /* Filter out . and .. */
711 continue;
712 }
713 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
714 if ((*endp != '\0') ||
715 (endp == namelist[i]->d_name) ||
716 (errno == ERANGE)) {
717 pr_debug("invalid directory (%s). Skipping.\n",
718 namelist[i]->d_name);
719 continue;
720 }
721 sprintf(path, "%s/%s/proc/kallsyms",
722 symbol_conf.guestmount,
723 namelist[i]->d_name);
724 ret = access(path, R_OK);
725 if (ret) {
726 pr_debug("Can't access file %s\n", path);
727 goto failure;
728 }
729 machines__create_kernel_maps(machines, pid);
730 }
731failure:
732 free(namelist);
733 }
734
735 return ret;
736}
737
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300738void machines__destroy_kernel_maps(struct machines *machines)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300739{
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300740 struct rb_node *next = rb_first(&machines->guests);
741
742 machine__destroy_kernel_maps(&machines->host);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300743
744 while (next) {
745 struct machine *pos = rb_entry(next, struct machine, rb_node);
746
747 next = rb_next(&pos->rb_node);
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300748 rb_erase(&pos->rb_node, &machines->guests);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300749 machine__delete(pos);
750 }
751}
752
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300753int machines__create_kernel_maps(struct machines *machines, pid_t pid)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300754{
755 struct machine *machine = machines__findnew(machines, pid);
756
757 if (machine == NULL)
758 return -1;
759
760 return machine__create_kernel_maps(machine);
761}
762
763int machine__load_kallsyms(struct machine *machine, const char *filename,
764 enum map_type type, symbol_filter_t filter)
765{
766 struct map *map = machine->vmlinux_maps[type];
767 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
768
769 if (ret > 0) {
770 dso__set_loaded(map->dso, type);
771 /*
772 * Since /proc/kallsyms will have multiple sessions for the
773 * kernel, with modules between them, fixup the end of all
774 * sections.
775 */
776 __map_groups__fixup_end(&machine->kmaps, type);
777 }
778
779 return ret;
780}
781
782int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
783 symbol_filter_t filter)
784{
785 struct map *map = machine->vmlinux_maps[type];
786 int ret = dso__load_vmlinux_path(map->dso, map, filter);
787
Adrian Hunter39b12f782013-08-07 14:38:47 +0300788 if (ret > 0)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300789 dso__set_loaded(map->dso, type);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300790
791 return ret;
792}
793
794static void map_groups__fixup_end(struct map_groups *mg)
795{
796 int i;
797 for (i = 0; i < MAP__NR_TYPES; ++i)
798 __map_groups__fixup_end(mg, i);
799}
800
801static char *get_kernel_version(const char *root_dir)
802{
803 char version[PATH_MAX];
804 FILE *file;
805 char *name, *tmp;
806 const char *prefix = "Linux version ";
807
808 sprintf(version, "%s/proc/version", root_dir);
809 file = fopen(version, "r");
810 if (!file)
811 return NULL;
812
813 version[0] = '\0';
814 tmp = fgets(version, sizeof(version), file);
815 fclose(file);
816
817 name = strstr(version, prefix);
818 if (!name)
819 return NULL;
820 name += strlen(prefix);
821 tmp = strchr(name, ' ');
822 if (tmp)
823 *tmp = '\0';
824
825 return strdup(name);
826}
827
828static int map_groups__set_modules_path_dir(struct map_groups *mg,
Richard Yao61d42902014-04-26 13:17:55 -0400829 const char *dir_name, int depth)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300830{
831 struct dirent *dent;
832 DIR *dir = opendir(dir_name);
833 int ret = 0;
834
835 if (!dir) {
836 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
837 return -1;
838 }
839
840 while ((dent = readdir(dir)) != NULL) {
841 char path[PATH_MAX];
842 struct stat st;
843
844 /*sshfs might return bad dent->d_type, so we have to stat*/
845 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
846 if (stat(path, &st))
847 continue;
848
849 if (S_ISDIR(st.st_mode)) {
850 if (!strcmp(dent->d_name, ".") ||
851 !strcmp(dent->d_name, ".."))
852 continue;
853
Richard Yao61d42902014-04-26 13:17:55 -0400854 /* Do not follow top-level source and build symlinks */
855 if (depth == 0) {
856 if (!strcmp(dent->d_name, "source") ||
857 !strcmp(dent->d_name, "build"))
858 continue;
859 }
860
861 ret = map_groups__set_modules_path_dir(mg, path,
862 depth + 1);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300863 if (ret < 0)
864 goto out;
865 } else {
866 char *dot = strrchr(dent->d_name, '.'),
867 dso_name[PATH_MAX];
868 struct map *map;
869 char *long_name;
870
Namhyung Kimc00c48f2014-11-04 10:14:27 +0900871 if (dot == NULL)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300872 continue;
Namhyung Kimc00c48f2014-11-04 10:14:27 +0900873
874 /* On some system, modules are compressed like .ko.gz */
875 if (is_supported_compression(dot + 1) &&
876 is_kmodule_extension(dot - 2))
877 dot -= 3;
878
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300879 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
880 (int)(dot - dent->d_name), dent->d_name);
881
882 strxfrchar(dso_name, '-', '_');
883 map = map_groups__find_by_name(mg, MAP__FUNCTION,
884 dso_name);
885 if (map == NULL)
886 continue;
887
888 long_name = strdup(path);
889 if (long_name == NULL) {
890 ret = -1;
891 goto out;
892 }
Arnaldo Carvalho de Melo7e155d42013-12-10 15:08:44 -0300893 dso__set_long_name(map->dso, long_name, true);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300894 dso__kernel_module_get_build_id(map->dso, "");
895 }
896 }
897
898out:
899 closedir(dir);
900 return ret;
901}
902
903static int machine__set_modules_path(struct machine *machine)
904{
905 char *version;
906 char modules_path[PATH_MAX];
907
908 version = get_kernel_version(machine->root_dir);
909 if (!version)
910 return -1;
911
Richard Yao61d42902014-04-26 13:17:55 -0400912 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300913 machine->root_dir, version);
914 free(version);
915
Richard Yao61d42902014-04-26 13:17:55 -0400916 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300917}
918
Adrian Hunter316d70d2013-10-08 11:45:48 +0300919static int machine__create_module(void *arg, const char *name, u64 start)
920{
921 struct machine *machine = arg;
922 struct map *map;
923
924 map = machine__new_module(machine, start, name);
925 if (map == NULL)
926 return -1;
927
928 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
929
930 return 0;
931}
932
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300933static int machine__create_modules(struct machine *machine)
934{
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300935 const char *modules;
936 char path[PATH_MAX];
937
Adrian Hunterf4be9042013-09-22 13:22:09 +0300938 if (machine__is_default_guest(machine)) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300939 modules = symbol_conf.default_guest_modules;
Adrian Hunterf4be9042013-09-22 13:22:09 +0300940 } else {
941 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300942 modules = path;
943 }
944
Adrian Hunteraa7fe3b2013-09-22 13:22:09 +0300945 if (symbol__restricted_filename(modules, "/proc/modules"))
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300946 return -1;
947
Adrian Hunter316d70d2013-10-08 11:45:48 +0300948 if (modules__parse(modules, machine, machine__create_module))
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300949 return -1;
950
Adrian Hunter316d70d2013-10-08 11:45:48 +0300951 if (!machine__set_modules_path(machine))
952 return 0;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300953
Adrian Hunter316d70d2013-10-08 11:45:48 +0300954 pr_debug("Problems setting modules path maps, continuing anyway...\n");
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300955
Jason Wessel8f76fcd2013-07-15 15:27:53 -0500956 return 0;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300957}
958
959int machine__create_kernel_maps(struct machine *machine)
960{
961 struct dso *kernel = machine__get_kernel(machine);
Adrian Hunter5512cf22014-01-29 16:14:39 +0200962 const char *name;
Adrian Hunter4b993752014-08-15 22:08:38 +0300963 u64 addr = machine__get_running_kernel_start(machine, &name);
Adrian Hunter5512cf22014-01-29 16:14:39 +0200964 if (!addr)
965 return -1;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300966
967 if (kernel == NULL ||
968 __machine__create_kernel_maps(machine, kernel) < 0)
969 return -1;
970
971 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
972 if (machine__is_host(machine))
973 pr_debug("Problems creating module maps, "
974 "continuing anyway...\n");
975 else
976 pr_debug("Problems creating module maps for guest %d, "
977 "continuing anyway...\n", machine->pid);
978 }
979
980 /*
981 * Now that we have all the maps created, just set the ->end of them:
982 */
983 map_groups__fixup_end(&machine->kmaps);
Adrian Hunter5512cf22014-01-29 16:14:39 +0200984
985 if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name,
986 addr)) {
987 machine__destroy_kernel_maps(machine);
988 return -1;
989 }
990
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300991 return 0;
992}
993
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300994static void machine__set_kernel_mmap_len(struct machine *machine,
995 union perf_event *event)
996{
Namhyung Kim4552cf0f2012-11-07 16:27:10 +0900997 int i;
998
999 for (i = 0; i < MAP__NR_TYPES; i++) {
1000 machine->vmlinux_maps[i]->start = event->mmap.start;
1001 machine->vmlinux_maps[i]->end = (event->mmap.start +
1002 event->mmap.len);
1003 /*
1004 * Be a bit paranoid here, some perf.data file came with
1005 * a zero sized synthesized MMAP event for the kernel.
1006 */
1007 if (machine->vmlinux_maps[i]->end == 0)
1008 machine->vmlinux_maps[i]->end = ~0ULL;
1009 }
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001010}
1011
Adrian Hunter8e0cf962013-08-07 14:38:51 +03001012static bool machine__uses_kcore(struct machine *machine)
1013{
1014 struct dso *dso;
1015
Waiman Long8fa7d872014-09-29 16:07:28 -04001016 list_for_each_entry(dso, &machine->kernel_dsos.head, node) {
Adrian Hunter8e0cf962013-08-07 14:38:51 +03001017 if (dso__is_kcore(dso))
1018 return true;
1019 }
1020
1021 return false;
1022}
1023
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001024static int machine__process_kernel_mmap_event(struct machine *machine,
1025 union perf_event *event)
1026{
1027 struct map *map;
1028 char kmmap_prefix[PATH_MAX];
1029 enum dso_kernel_type kernel_type;
1030 bool is_kernel_mmap;
1031
Adrian Hunter8e0cf962013-08-07 14:38:51 +03001032 /* If we have maps from kcore then we do not need or want any others */
1033 if (machine__uses_kcore(machine))
1034 return 0;
1035
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001036 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
1037 if (machine__is_host(machine))
1038 kernel_type = DSO_TYPE_KERNEL;
1039 else
1040 kernel_type = DSO_TYPE_GUEST_KERNEL;
1041
1042 is_kernel_mmap = memcmp(event->mmap.filename,
1043 kmmap_prefix,
1044 strlen(kmmap_prefix) - 1) == 0;
1045 if (event->mmap.filename[0] == '/' ||
1046 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
1047
1048 char short_module_name[1024];
1049 char *name, *dot;
1050
1051 if (event->mmap.filename[0] == '/') {
1052 name = strrchr(event->mmap.filename, '/');
1053 if (name == NULL)
1054 goto out_problem;
1055
1056 ++name; /* skip / */
1057 dot = strrchr(name, '.');
1058 if (dot == NULL)
1059 goto out_problem;
Namhyung Kimc00c48f2014-11-04 10:14:27 +09001060 /* On some system, modules are compressed like .ko.gz */
1061 if (is_supported_compression(dot + 1))
1062 dot -= 3;
1063 if (!is_kmodule_extension(dot + 1))
1064 goto out_problem;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001065 snprintf(short_module_name, sizeof(short_module_name),
1066 "[%.*s]", (int)(dot - name), name);
1067 strxfrchar(short_module_name, '-', '_');
1068 } else
1069 strcpy(short_module_name, event->mmap.filename);
1070
1071 map = machine__new_module(machine, event->mmap.start,
1072 event->mmap.filename);
1073 if (map == NULL)
1074 goto out_problem;
1075
1076 name = strdup(short_module_name);
1077 if (name == NULL)
1078 goto out_problem;
1079
Adrian Hunter58a98c92013-12-10 11:11:46 -03001080 dso__set_short_name(map->dso, name, true);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001081 map->end = map->start + event->mmap.len;
1082 } else if (is_kernel_mmap) {
1083 const char *symbol_name = (event->mmap.filename +
1084 strlen(kmmap_prefix));
1085 /*
1086 * Should be there already, from the build-id table in
1087 * the header.
1088 */
Namhyung Kimb837a8b2014-11-04 10:14:33 +09001089 struct dso *kernel = NULL;
1090 struct dso *dso;
1091
1092 list_for_each_entry(dso, &machine->kernel_dsos.head, node) {
1093 if (is_kernel_module(dso->long_name, NULL))
1094 continue;
1095
1096 kernel = dso;
1097 break;
1098 }
1099
1100 if (kernel == NULL)
1101 kernel = __dsos__findnew(&machine->kernel_dsos,
1102 kmmap_prefix);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001103 if (kernel == NULL)
1104 goto out_problem;
1105
1106 kernel->kernel = kernel_type;
1107 if (__machine__create_kernel_maps(machine, kernel) < 0)
1108 goto out_problem;
1109
Namhyung Kim330dfa22014-11-18 13:30:28 +09001110 if (strstr(kernel->long_name, "vmlinux"))
1111 dso__set_short_name(kernel, "[kernel.vmlinux]", false);
Namhyung Kim96d78052014-11-04 10:14:34 +09001112
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001113 machine__set_kernel_mmap_len(machine, event);
1114
1115 /*
1116 * Avoid using a zero address (kptr_restrict) for the ref reloc
1117 * symbol. Effectively having zero here means that at record
1118 * time /proc/sys/kernel/kptr_restrict was non zero.
1119 */
1120 if (event->mmap.pgoff != 0) {
1121 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
1122 symbol_name,
1123 event->mmap.pgoff);
1124 }
1125
1126 if (machine__is_default_guest(machine)) {
1127 /*
1128 * preload dso of guest kernel and modules
1129 */
1130 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
1131 NULL);
1132 }
1133 }
1134 return 0;
1135out_problem:
1136 return -1;
1137}
1138
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001139int machine__process_mmap2_event(struct machine *machine,
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001140 union perf_event *event,
1141 struct perf_sample *sample __maybe_unused)
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001142{
1143 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1144 struct thread *thread;
1145 struct map *map;
1146 enum map_type type;
1147 int ret = 0;
1148
1149 if (dump_trace)
1150 perf_event__fprintf_mmap2(event, stdout);
1151
1152 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1153 cpumode == PERF_RECORD_MISC_KERNEL) {
1154 ret = machine__process_kernel_mmap_event(machine, event);
1155 if (ret < 0)
1156 goto out_problem;
1157 return 0;
1158 }
1159
1160 thread = machine__findnew_thread(machine, event->mmap2.pid,
Don Zickus11c9abf2014-02-26 10:45:27 -05001161 event->mmap2.tid);
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001162 if (thread == NULL)
1163 goto out_problem;
1164
1165 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1166 type = MAP__VARIABLE;
1167 else
1168 type = MAP__FUNCTION;
1169
Adrian Hunter2a030682014-07-22 16:17:53 +03001170 map = map__new(machine, event->mmap2.start,
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001171 event->mmap2.len, event->mmap2.pgoff,
1172 event->mmap2.pid, event->mmap2.maj,
1173 event->mmap2.min, event->mmap2.ino,
1174 event->mmap2.ino_generation,
Don Zickus7ef80702014-05-19 15:13:49 -04001175 event->mmap2.prot,
1176 event->mmap2.flags,
Adrian Hunter5835edd2014-07-22 16:18:00 +03001177 event->mmap2.filename, type, thread);
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001178
1179 if (map == NULL)
1180 goto out_problem;
1181
1182 thread__insert_map(thread, map);
1183 return 0;
1184
1185out_problem:
1186 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1187 return 0;
1188}
1189
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001190int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1191 struct perf_sample *sample __maybe_unused)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001192{
1193 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1194 struct thread *thread;
1195 struct map *map;
Stephane Eranianbad40912013-01-24 16:10:40 +01001196 enum map_type type;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001197 int ret = 0;
1198
1199 if (dump_trace)
1200 perf_event__fprintf_mmap(event, stdout);
1201
1202 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1203 cpumode == PERF_RECORD_MISC_KERNEL) {
1204 ret = machine__process_kernel_mmap_event(machine, event);
1205 if (ret < 0)
1206 goto out_problem;
1207 return 0;
1208 }
1209
Adrian Hunter314add62013-08-27 11:23:03 +03001210 thread = machine__findnew_thread(machine, event->mmap.pid,
Don Zickus11c9abf2014-02-26 10:45:27 -05001211 event->mmap.tid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001212 if (thread == NULL)
1213 goto out_problem;
Stephane Eranianbad40912013-01-24 16:10:40 +01001214
1215 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1216 type = MAP__VARIABLE;
1217 else
1218 type = MAP__FUNCTION;
1219
Adrian Hunter2a030682014-07-22 16:17:53 +03001220 map = map__new(machine, event->mmap.start,
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001221 event->mmap.len, event->mmap.pgoff,
Don Zickus7ef80702014-05-19 15:13:49 -04001222 event->mmap.pid, 0, 0, 0, 0, 0, 0,
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001223 event->mmap.filename,
Adrian Hunter5835edd2014-07-22 16:18:00 +03001224 type, thread);
Stephane Eranianbad40912013-01-24 16:10:40 +01001225
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001226 if (map == NULL)
1227 goto out_problem;
1228
1229 thread__insert_map(thread, map);
1230 return 0;
1231
1232out_problem:
1233 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1234 return 0;
1235}
1236
David Ahern236a3bb2013-08-14 08:49:27 -06001237static void machine__remove_thread(struct machine *machine, struct thread *th)
1238{
1239 machine->last_match = NULL;
1240 rb_erase(&th->rb_node, &machine->threads);
1241 /*
1242 * We may have references to this thread, for instance in some hist_entry
1243 * instances, so just move them to a separate list.
1244 */
1245 list_add_tail(&th->node, &machine->dead_threads);
1246}
1247
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001248int machine__process_fork_event(struct machine *machine, union perf_event *event,
1249 struct perf_sample *sample)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001250{
Jiri Olsad75e6092014-03-14 15:00:03 +01001251 struct thread *thread = machine__find_thread(machine,
1252 event->fork.pid,
1253 event->fork.tid);
Adrian Hunter314add62013-08-27 11:23:03 +03001254 struct thread *parent = machine__findnew_thread(machine,
1255 event->fork.ppid,
1256 event->fork.ptid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001257
David Ahern236a3bb2013-08-14 08:49:27 -06001258 /* if a thread currently exists for the thread id remove it */
1259 if (thread != NULL)
1260 machine__remove_thread(machine, thread);
1261
Adrian Hunter314add62013-08-27 11:23:03 +03001262 thread = machine__findnew_thread(machine, event->fork.pid,
1263 event->fork.tid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001264 if (dump_trace)
1265 perf_event__fprintf_task(event, stdout);
1266
1267 if (thread == NULL || parent == NULL ||
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001268 thread__fork(thread, parent, sample->time) < 0) {
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001269 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1270 return -1;
1271 }
1272
1273 return 0;
1274}
1275
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001276int machine__process_exit_event(struct machine *machine, union perf_event *event,
1277 struct perf_sample *sample __maybe_unused)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001278{
Jiri Olsad75e6092014-03-14 15:00:03 +01001279 struct thread *thread = machine__find_thread(machine,
1280 event->fork.pid,
1281 event->fork.tid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001282
1283 if (dump_trace)
1284 perf_event__fprintf_task(event, stdout);
1285
1286 if (thread != NULL)
David Ahern236a3bb2013-08-14 08:49:27 -06001287 thread__exited(thread);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001288
1289 return 0;
1290}
1291
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001292int machine__process_event(struct machine *machine, union perf_event *event,
1293 struct perf_sample *sample)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001294{
1295 int ret;
1296
1297 switch (event->header.type) {
1298 case PERF_RECORD_COMM:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001299 ret = machine__process_comm_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001300 case PERF_RECORD_MMAP:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001301 ret = machine__process_mmap_event(machine, event, sample); break;
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001302 case PERF_RECORD_MMAP2:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001303 ret = machine__process_mmap2_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001304 case PERF_RECORD_FORK:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001305 ret = machine__process_fork_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001306 case PERF_RECORD_EXIT:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001307 ret = machine__process_exit_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001308 case PERF_RECORD_LOST:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001309 ret = machine__process_lost_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001310 default:
1311 ret = -1;
1312 break;
1313 }
1314
1315 return ret;
1316}
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001317
Greg Priceb21484f2012-12-06 21:48:05 -08001318static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001319{
Greg Priceb21484f2012-12-06 21:48:05 -08001320 if (sym->name && !regexec(regex, sym->name, 0, NULL, 0))
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001321 return 1;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001322 return 0;
1323}
1324
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001325static void ip__resolve_ams(struct thread *thread,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001326 struct addr_map_symbol *ams,
1327 u64 ip)
1328{
1329 struct addr_location al;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001330
1331 memset(&al, 0, sizeof(al));
Arnaldo Carvalho de Melo52a3cb82014-03-11 16:16:49 -03001332 /*
1333 * We cannot use the header.misc hint to determine whether a
1334 * branch stack address is user, kernel, guest, hypervisor.
1335 * Branches may straddle the kernel/user/hypervisor boundaries.
1336 * Thus, we have to try consecutively until we find a match
1337 * or else, the symbol is unknown
1338 */
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001339 thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001340
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001341 ams->addr = ip;
1342 ams->al_addr = al.addr;
1343 ams->sym = al.sym;
1344 ams->map = al.map;
1345}
1346
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001347static void ip__resolve_data(struct thread *thread,
Stephane Eranian98a3b322013-01-24 16:10:35 +01001348 u8 m, struct addr_map_symbol *ams, u64 addr)
1349{
1350 struct addr_location al;
1351
1352 memset(&al, 0, sizeof(al));
1353
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001354 thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al);
Don Zickus06b2afc2014-08-20 23:25:11 -04001355 if (al.map == NULL) {
1356 /*
1357 * some shared data regions have execute bit set which puts
1358 * their mapping in the MAP__FUNCTION type array.
1359 * Check there as a fallback option before dropping the sample.
1360 */
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001361 thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al);
Don Zickus06b2afc2014-08-20 23:25:11 -04001362 }
1363
Stephane Eranian98a3b322013-01-24 16:10:35 +01001364 ams->addr = addr;
1365 ams->al_addr = al.addr;
1366 ams->sym = al.sym;
1367 ams->map = al.map;
1368}
1369
Arnaldo Carvalho de Meloe80faac2014-01-22 13:05:06 -03001370struct mem_info *sample__resolve_mem(struct perf_sample *sample,
1371 struct addr_location *al)
Stephane Eranian98a3b322013-01-24 16:10:35 +01001372{
1373 struct mem_info *mi = zalloc(sizeof(*mi));
1374
1375 if (!mi)
1376 return NULL;
1377
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001378 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
1379 ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr);
Stephane Eranian98a3b322013-01-24 16:10:35 +01001380 mi->data_src.val = sample->data_src;
1381
1382 return mi;
1383}
1384
Andi Kleen37592b82014-11-12 18:05:19 -08001385static int add_callchain_ip(struct thread *thread,
1386 struct symbol **parent,
1387 struct addr_location *root_al,
1388 int cpumode,
1389 u64 ip)
1390{
1391 struct addr_location al;
1392
1393 al.filtered = 0;
1394 al.sym = NULL;
Andi Kleen8b7bad52014-11-12 18:05:20 -08001395 if (cpumode == -1)
1396 thread__find_cpumode_addr_location(thread, MAP__FUNCTION,
1397 ip, &al);
1398 else
1399 thread__find_addr_location(thread, cpumode, MAP__FUNCTION,
Andi Kleen37592b82014-11-12 18:05:19 -08001400 ip, &al);
1401 if (al.sym != NULL) {
1402 if (sort__has_parent && !*parent &&
1403 symbol__match_regex(al.sym, &parent_regex))
1404 *parent = al.sym;
1405 else if (have_ignore_callees && root_al &&
1406 symbol__match_regex(al.sym, &ignore_callees_regex)) {
1407 /* Treat this symbol as the root,
1408 forgetting its callees. */
1409 *root_al = al;
1410 callchain_cursor_reset(&callchain_cursor);
1411 }
1412 }
1413
Andi Kleen55501712014-11-12 18:05:21 -08001414 return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym);
Andi Kleen37592b82014-11-12 18:05:19 -08001415}
1416
Arnaldo Carvalho de Melo644f2df2014-01-22 13:15:36 -03001417struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
1418 struct addr_location *al)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001419{
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001420 unsigned int i;
Arnaldo Carvalho de Melo644f2df2014-01-22 13:15:36 -03001421 const struct branch_stack *bs = sample->branch_stack;
1422 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001423
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001424 if (!bi)
1425 return NULL;
1426
1427 for (i = 0; i < bs->nr; i++) {
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001428 ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
1429 ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001430 bi[i].flags = bs->entries[i].flags;
1431 }
1432 return bi;
1433}
1434
Andi Kleen8b7bad52014-11-12 18:05:20 -08001435#define CHASHSZ 127
1436#define CHASHBITS 7
1437#define NO_ENTRY 0xff
1438
1439#define PERF_MAX_BRANCH_DEPTH 127
1440
1441/* Remove loops. */
1442static int remove_loops(struct branch_entry *l, int nr)
1443{
1444 int i, j, off;
1445 unsigned char chash[CHASHSZ];
1446
1447 memset(chash, NO_ENTRY, sizeof(chash));
1448
1449 BUG_ON(PERF_MAX_BRANCH_DEPTH > 255);
1450
1451 for (i = 0; i < nr; i++) {
1452 int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ;
1453
1454 /* no collision handling for now */
1455 if (chash[h] == NO_ENTRY) {
1456 chash[h] = i;
1457 } else if (l[chash[h]].from == l[i].from) {
1458 bool is_loop = true;
1459 /* check if it is a real loop */
1460 off = 0;
1461 for (j = chash[h]; j < i && i + off < nr; j++, off++)
1462 if (l[j].from != l[i + off].from) {
1463 is_loop = false;
1464 break;
1465 }
1466 if (is_loop) {
1467 memmove(l + i, l + i + off,
1468 (nr - (i + off)) * sizeof(*l));
1469 nr -= off;
1470 }
1471 }
1472 }
1473 return nr;
1474}
1475
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001476static int thread__resolve_callchain_sample(struct thread *thread,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001477 struct ip_callchain *chain,
Andi Kleen8b7bad52014-11-12 18:05:20 -08001478 struct branch_stack *branch,
Greg Priceb21484f2012-12-06 21:48:05 -08001479 struct symbol **parent,
Waiman Long91e95612013-10-18 10:38:48 -04001480 struct addr_location *root_al,
1481 int max_stack)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001482{
1483 u8 cpumode = PERF_RECORD_MISC_USER;
Waiman Long91e95612013-10-18 10:38:48 -04001484 int chain_nr = min(max_stack, (int)chain->nr);
1485 int i;
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001486 int j;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001487 int err;
Andi Kleen8b7bad52014-11-12 18:05:20 -08001488 int skip_idx = -1;
1489 int first_call = 0;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001490
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001491 /*
1492 * Based on DWARF debug information, some architectures skip
1493 * a callchain entry saved by the kernel.
1494 */
Andi Kleen8b7bad52014-11-12 18:05:20 -08001495 if (chain->nr < PERF_MAX_STACK_DEPTH)
1496 skip_idx = arch_skip_callchain_idx(thread, chain);
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001497
Andi Kleen8b7bad52014-11-12 18:05:20 -08001498 callchain_cursor_reset(&callchain_cursor);
1499
1500 /*
1501 * Add branches to call stack for easier browsing. This gives
1502 * more context for a sample than just the callers.
1503 *
1504 * This uses individual histograms of paths compared to the
1505 * aggregated histograms the normal LBR mode uses.
1506 *
1507 * Limitations for now:
1508 * - No extra filters
1509 * - No annotations (should annotate somehow)
1510 */
1511
1512 if (branch && callchain_param.branch_callstack) {
1513 int nr = min(max_stack, (int)branch->nr);
1514 struct branch_entry be[nr];
1515
1516 if (branch->nr > PERF_MAX_BRANCH_DEPTH) {
1517 pr_warning("corrupted branch chain. skipping...\n");
1518 goto check_calls;
1519 }
1520
1521 for (i = 0; i < nr; i++) {
1522 if (callchain_param.order == ORDER_CALLEE) {
1523 be[i] = branch->entries[i];
1524 /*
1525 * Check for overlap into the callchain.
1526 * The return address is one off compared to
1527 * the branch entry. To adjust for this
1528 * assume the calling instruction is not longer
1529 * than 8 bytes.
1530 */
1531 if (i == skip_idx ||
1532 chain->ips[first_call] >= PERF_CONTEXT_MAX)
1533 first_call++;
1534 else if (be[i].from < chain->ips[first_call] &&
1535 be[i].from >= chain->ips[first_call] - 8)
1536 first_call++;
1537 } else
1538 be[i] = branch->entries[branch->nr - i - 1];
1539 }
1540
1541 nr = remove_loops(be, nr);
1542
1543 for (i = 0; i < nr; i++) {
1544 err = add_callchain_ip(thread, parent, root_al,
1545 -1, be[i].to);
1546 if (!err)
1547 err = add_callchain_ip(thread, parent, root_al,
1548 -1, be[i].from);
1549 if (err == -EINVAL)
1550 break;
1551 if (err)
1552 return err;
1553 }
1554 chain_nr -= nr;
1555 }
1556
1557check_calls:
1558 if (chain->nr > PERF_MAX_STACK_DEPTH) {
1559 pr_warning("corrupted callchain. skipping...\n");
1560 return 0;
1561 }
1562
1563 for (i = first_call; i < chain_nr; i++) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001564 u64 ip;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001565
1566 if (callchain_param.order == ORDER_CALLEE)
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001567 j = i;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001568 else
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001569 j = chain->nr - i - 1;
1570
1571#ifdef HAVE_SKIP_CALLCHAIN_IDX
1572 if (j == skip_idx)
1573 continue;
1574#endif
1575 ip = chain->ips[j];
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001576
1577 if (ip >= PERF_CONTEXT_MAX) {
1578 switch (ip) {
1579 case PERF_CONTEXT_HV:
1580 cpumode = PERF_RECORD_MISC_HYPERVISOR;
1581 break;
1582 case PERF_CONTEXT_KERNEL:
1583 cpumode = PERF_RECORD_MISC_KERNEL;
1584 break;
1585 case PERF_CONTEXT_USER:
1586 cpumode = PERF_RECORD_MISC_USER;
1587 break;
1588 default:
1589 pr_debug("invalid callchain context: "
1590 "%"PRId64"\n", (s64) ip);
1591 /*
1592 * It seems the callchain is corrupted.
1593 * Discard all.
1594 */
1595 callchain_cursor_reset(&callchain_cursor);
1596 return 0;
1597 }
1598 continue;
1599 }
1600
Andi Kleen37592b82014-11-12 18:05:19 -08001601 err = add_callchain_ip(thread, parent, root_al,
1602 cpumode, ip);
1603 if (err == -EINVAL)
1604 break;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001605 if (err)
1606 return err;
1607 }
1608
1609 return 0;
1610}
1611
1612static int unwind_entry(struct unwind_entry *entry, void *arg)
1613{
1614 struct callchain_cursor *cursor = arg;
1615 return callchain_cursor_append(cursor, entry->ip,
1616 entry->map, entry->sym);
1617}
1618
Arnaldo Carvalho de Melocc8b7c22014-10-23 15:26:17 -03001619int thread__resolve_callchain(struct thread *thread,
1620 struct perf_evsel *evsel,
1621 struct perf_sample *sample,
1622 struct symbol **parent,
1623 struct addr_location *root_al,
1624 int max_stack)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001625{
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001626 int ret = thread__resolve_callchain_sample(thread, sample->callchain,
Andi Kleen8b7bad52014-11-12 18:05:20 -08001627 sample->branch_stack,
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001628 parent, root_al, max_stack);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001629 if (ret)
1630 return ret;
1631
1632 /* Can we do dwarf post unwind? */
1633 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1634 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1635 return 0;
1636
1637 /* Bail out if nothing was captured. */
1638 if ((!sample->user_regs.regs) ||
1639 (!sample->user_stack.size))
1640 return 0;
1641
Arnaldo Carvalho de Melodd8c17a2014-10-23 16:42:19 -03001642 return unwind__get_entries(unwind_entry, &callchain_cursor,
Jiri Olsa352ea452014-01-07 13:47:25 +01001643 thread, sample, max_stack);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001644
1645}
David Ahern35feee12013-09-28 13:12:58 -06001646
1647int machine__for_each_thread(struct machine *machine,
1648 int (*fn)(struct thread *thread, void *p),
1649 void *priv)
1650{
1651 struct rb_node *nd;
1652 struct thread *thread;
1653 int rc = 0;
1654
1655 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
1656 thread = rb_entry(nd, struct thread, rb_node);
1657 rc = fn(thread, priv);
1658 if (rc != 0)
1659 return rc;
1660 }
1661
1662 list_for_each_entry(thread, &machine->dead_threads, node) {
1663 rc = fn(thread, priv);
1664 if (rc != 0)
1665 return rc;
1666 }
1667 return rc;
1668}
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001669
Arnaldo Carvalho de Meloa33fbd52013-11-11 11:36:12 -03001670int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -03001671 struct target *target, struct thread_map *threads,
Arnaldo Carvalho de Meloa33fbd52013-11-11 11:36:12 -03001672 perf_event__handler_t process, bool data_mmap)
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001673{
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -03001674 if (target__has_task(target))
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001675 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -03001676 else if (target__has_cpu(target))
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001677 return perf_event__synthesize_threads(tool, process, machine, data_mmap);
1678 /* command specified */
1679 return 0;
1680}
Adrian Hunterb9d266b2014-07-22 16:17:25 +03001681
1682pid_t machine__get_current_tid(struct machine *machine, int cpu)
1683{
1684 if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
1685 return -1;
1686
1687 return machine->current_tid[cpu];
1688}
1689
1690int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
1691 pid_t tid)
1692{
1693 struct thread *thread;
1694
1695 if (cpu < 0)
1696 return -EINVAL;
1697
1698 if (!machine->current_tid) {
1699 int i;
1700
1701 machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
1702 if (!machine->current_tid)
1703 return -ENOMEM;
1704 for (i = 0; i < MAX_NR_CPUS; i++)
1705 machine->current_tid[i] = -1;
1706 }
1707
1708 if (cpu >= MAX_NR_CPUS) {
1709 pr_err("Requested CPU %d too large. ", cpu);
1710 pr_err("Consider raising MAX_NR_CPUS\n");
1711 return -EINVAL;
1712 }
1713
1714 machine->current_tid[cpu] = tid;
1715
1716 thread = machine__findnew_thread(machine, pid, tid);
1717 if (!thread)
1718 return -ENOMEM;
1719
1720 thread->cpu = cpu;
1721
1722 return 0;
1723}
Adrian Hunterfbe2af42014-08-15 22:08:39 +03001724
1725int machine__get_kernel_start(struct machine *machine)
1726{
1727 struct map *map = machine__kernel_map(machine, MAP__FUNCTION);
1728 int err = 0;
1729
1730 /*
1731 * The only addresses above 2^63 are kernel addresses of a 64-bit
1732 * kernel. Note that addresses are unsigned so that on a 32-bit system
1733 * all addresses including kernel addresses are less than 2^32. In
1734 * that case (32-bit system), if the kernel mapping is unknown, all
1735 * addresses will be assumed to be in user space - see
1736 * machine__kernel_ip().
1737 */
1738 machine->kernel_start = 1ULL << 63;
1739 if (map) {
1740 err = map__load(map, machine->symbol_filter);
1741 if (map->start)
1742 machine->kernel_start = map->start;
1743 }
1744 return err;
1745}