blob: fd192e4885cc4887e400d226794a7c1fb5e24dbc [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"
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -030015
Arnaldo Carvalho de Meloe167f992014-10-14 15:07:48 -030016static void dsos__init(struct dsos *dsos)
17{
18 INIT_LIST_HEAD(&dsos->head);
19 dsos->root = RB_ROOT;
20}
21
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030022int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
23{
Arnaldo Carvalho de Melo11246c72014-10-21 17:29:02 -030024 map_groups__init(&machine->kmaps, machine);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030025 RB_CLEAR_NODE(&machine->rb_node);
Arnaldo Carvalho de Meloe167f992014-10-14 15:07:48 -030026 dsos__init(&machine->user_dsos);
27 dsos__init(&machine->kernel_dsos);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030028
29 machine->threads = RB_ROOT;
30 INIT_LIST_HEAD(&machine->dead_threads);
31 machine->last_match = NULL;
32
Adrian Hunterd027b642014-07-23 14:23:00 +030033 machine->vdso_info = NULL;
34
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030035 machine->pid = pid;
36
Adrian Hunter611a5ce2013-08-08 14:32:20 +030037 machine->symbol_filter = NULL;
Jiri Olsa14bd6d22014-01-07 13:47:19 +010038 machine->id_hdr_size = 0;
Adrian Huntercfe1c412014-07-31 09:00:45 +030039 machine->comm_exec = false;
Adrian Hunterfbe2af42014-08-15 22:08:39 +030040 machine->kernel_start = 0;
Adrian Hunter611a5ce2013-08-08 14:32:20 +030041
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030042 machine->root_dir = strdup(root_dir);
43 if (machine->root_dir == NULL)
44 return -ENOMEM;
45
46 if (pid != HOST_KERNEL_ID) {
Adrian Hunter1fcb8762014-07-14 13:02:25 +030047 struct thread *thread = machine__findnew_thread(machine, -1,
Adrian Hunter314add62013-08-27 11:23:03 +030048 pid);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030049 char comm[64];
50
51 if (thread == NULL)
52 return -ENOMEM;
53
54 snprintf(comm, sizeof(comm), "[guest/%d]", pid);
Frederic Weisbecker162f0be2013-09-11 16:18:24 +020055 thread__set_comm(thread, comm, 0);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030056 }
57
Adrian Hunterb9d266b2014-07-22 16:17:25 +030058 machine->current_tid = NULL;
59
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030060 return 0;
61}
62
David Ahern8fb598e2013-09-28 13:13:00 -060063struct machine *machine__new_host(void)
64{
65 struct machine *machine = malloc(sizeof(*machine));
66
67 if (machine != NULL) {
68 machine__init(machine, "", HOST_KERNEL_ID);
69
70 if (machine__create_kernel_maps(machine) < 0)
71 goto out_delete;
72 }
73
74 return machine;
75out_delete:
76 free(machine);
77 return NULL;
78}
79
Waiman Long8fa7d872014-09-29 16:07:28 -040080static void dsos__delete(struct dsos *dsos)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030081{
82 struct dso *pos, *n;
83
Waiman Long8fa7d872014-09-29 16:07:28 -040084 list_for_each_entry_safe(pos, n, &dsos->head, node) {
Waiman Long4598a0a2014-09-30 13:36:15 -040085 RB_CLEAR_NODE(&pos->rb_node);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -030086 list_del(&pos->node);
87 dso__delete(pos);
88 }
89}
90
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -030091void machine__delete_dead_threads(struct machine *machine)
92{
93 struct thread *n, *t;
94
95 list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
96 list_del(&t->node);
97 thread__delete(t);
98 }
99}
100
101void machine__delete_threads(struct machine *machine)
102{
103 struct rb_node *nd = rb_first(&machine->threads);
104
105 while (nd) {
106 struct thread *t = rb_entry(nd, struct thread, rb_node);
107
108 rb_erase(&t->rb_node, &machine->threads);
109 nd = rb_next(nd);
110 thread__delete(t);
111 }
112}
113
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300114void machine__exit(struct machine *machine)
115{
116 map_groups__exit(&machine->kmaps);
117 dsos__delete(&machine->user_dsos);
118 dsos__delete(&machine->kernel_dsos);
Adrian Hunterd027b642014-07-23 14:23:00 +0300119 vdso__exit(machine);
Arnaldo Carvalho de Melo04662522013-12-26 17:41:15 -0300120 zfree(&machine->root_dir);
Adrian Hunterb9d266b2014-07-22 16:17:25 +0300121 zfree(&machine->current_tid);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300122}
123
124void machine__delete(struct machine *machine)
125{
126 machine__exit(machine);
127 free(machine);
128}
129
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300130void machines__init(struct machines *machines)
131{
132 machine__init(&machines->host, "", HOST_KERNEL_ID);
133 machines->guests = RB_ROOT;
Adrian Hunter611a5ce2013-08-08 14:32:20 +0300134 machines->symbol_filter = NULL;
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300135}
136
137void machines__exit(struct machines *machines)
138{
139 machine__exit(&machines->host);
140 /* XXX exit guest */
141}
142
143struct machine *machines__add(struct machines *machines, pid_t pid,
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300144 const char *root_dir)
145{
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300146 struct rb_node **p = &machines->guests.rb_node;
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300147 struct rb_node *parent = NULL;
148 struct machine *pos, *machine = malloc(sizeof(*machine));
149
150 if (machine == NULL)
151 return NULL;
152
153 if (machine__init(machine, root_dir, pid) != 0) {
154 free(machine);
155 return NULL;
156 }
157
Adrian Hunter611a5ce2013-08-08 14:32:20 +0300158 machine->symbol_filter = machines->symbol_filter;
159
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300160 while (*p != NULL) {
161 parent = *p;
162 pos = rb_entry(parent, struct machine, rb_node);
163 if (pid < pos->pid)
164 p = &(*p)->rb_left;
165 else
166 p = &(*p)->rb_right;
167 }
168
169 rb_link_node(&machine->rb_node, parent, p);
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300170 rb_insert_color(&machine->rb_node, &machines->guests);
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300171
172 return machine;
173}
174
Adrian Hunter611a5ce2013-08-08 14:32:20 +0300175void machines__set_symbol_filter(struct machines *machines,
176 symbol_filter_t symbol_filter)
177{
178 struct rb_node *nd;
179
180 machines->symbol_filter = symbol_filter;
181 machines->host.symbol_filter = symbol_filter;
182
183 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
184 struct machine *machine = rb_entry(nd, struct machine, rb_node);
185
186 machine->symbol_filter = symbol_filter;
187 }
188}
189
Adrian Huntercfe1c412014-07-31 09:00:45 +0300190void machines__set_comm_exec(struct machines *machines, bool comm_exec)
191{
192 struct rb_node *nd;
193
194 machines->host.comm_exec = comm_exec;
195
196 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
197 struct machine *machine = rb_entry(nd, struct machine, rb_node);
198
199 machine->comm_exec = comm_exec;
200 }
201}
202
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300203struct machine *machines__find(struct machines *machines, pid_t pid)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300204{
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300205 struct rb_node **p = &machines->guests.rb_node;
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300206 struct rb_node *parent = NULL;
207 struct machine *machine;
208 struct machine *default_machine = NULL;
209
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300210 if (pid == HOST_KERNEL_ID)
211 return &machines->host;
212
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300213 while (*p != NULL) {
214 parent = *p;
215 machine = rb_entry(parent, struct machine, rb_node);
216 if (pid < machine->pid)
217 p = &(*p)->rb_left;
218 else if (pid > machine->pid)
219 p = &(*p)->rb_right;
220 else
221 return machine;
222 if (!machine->pid)
223 default_machine = machine;
224 }
225
226 return default_machine;
227}
228
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300229struct machine *machines__findnew(struct machines *machines, pid_t pid)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300230{
231 char path[PATH_MAX];
232 const char *root_dir = "";
233 struct machine *machine = machines__find(machines, pid);
234
235 if (machine && (machine->pid == pid))
236 goto out;
237
238 if ((pid != HOST_KERNEL_ID) &&
239 (pid != DEFAULT_GUEST_KERNEL_ID) &&
240 (symbol_conf.guestmount)) {
241 sprintf(path, "%s/%d", symbol_conf.guestmount, pid);
242 if (access(path, R_OK)) {
243 static struct strlist *seen;
244
245 if (!seen)
246 seen = strlist__new(true, NULL);
247
248 if (!strlist__has_entry(seen, path)) {
249 pr_err("Can't access file %s\n", path);
250 strlist__add(seen, path);
251 }
252 machine = NULL;
253 goto out;
254 }
255 root_dir = path;
256 }
257
258 machine = machines__add(machines, pid, root_dir);
259out:
260 return machine;
261}
262
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300263void machines__process_guests(struct machines *machines,
264 machine__process_t process, void *data)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300265{
266 struct rb_node *nd;
267
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300268 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300269 struct machine *pos = rb_entry(nd, struct machine, rb_node);
270 process(pos, data);
271 }
272}
273
274char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
275{
276 if (machine__is_host(machine))
277 snprintf(bf, size, "[%s]", "kernel.kallsyms");
278 else if (machine__is_default_guest(machine))
279 snprintf(bf, size, "[%s]", "guest.kernel.kallsyms");
280 else {
281 snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms",
282 machine->pid);
283 }
284
285 return bf;
286}
287
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300288void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300289{
290 struct rb_node *node;
291 struct machine *machine;
292
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300293 machines->host.id_hdr_size = id_hdr_size;
294
295 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
Arnaldo Carvalho de Melo69d25912012-11-09 11:32:52 -0300296 machine = rb_entry(node, struct machine, rb_node);
297 machine->id_hdr_size = id_hdr_size;
298 }
299
300 return;
301}
302
Adrian Hunter29ce3612014-07-16 11:07:13 +0300303static void machine__update_thread_pid(struct machine *machine,
304 struct thread *th, pid_t pid)
305{
306 struct thread *leader;
307
308 if (pid == th->pid_ || pid == -1 || th->pid_ != -1)
309 return;
310
311 th->pid_ = pid;
312
313 if (th->pid_ == th->tid)
314 return;
315
316 leader = machine__findnew_thread(machine, th->pid_, th->pid_);
317 if (!leader)
318 goto out_err;
319
320 if (!leader->mg)
Arnaldo Carvalho de Melo11246c72014-10-21 17:29:02 -0300321 leader->mg = map_groups__new(machine);
Adrian Hunter29ce3612014-07-16 11:07:13 +0300322
323 if (!leader->mg)
324 goto out_err;
325
326 if (th->mg == leader->mg)
327 return;
328
329 if (th->mg) {
330 /*
331 * Maps are created from MMAP events which provide the pid and
332 * tid. Consequently there never should be any maps on a thread
333 * with an unknown pid. Just print an error if there are.
334 */
335 if (!map_groups__empty(th->mg))
336 pr_err("Discarding thread maps for %d:%d\n",
337 th->pid_, th->tid);
338 map_groups__delete(th->mg);
339 }
340
341 th->mg = map_groups__get(leader->mg);
342
343 return;
344
345out_err:
346 pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid);
347}
348
Adrian Hunter99d725f2013-08-26 16:00:19 +0300349static struct thread *__machine__findnew_thread(struct machine *machine,
350 pid_t pid, pid_t tid,
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300351 bool create)
352{
353 struct rb_node **p = &machine->threads.rb_node;
354 struct rb_node *parent = NULL;
355 struct thread *th;
356
357 /*
Adrian Hunter38051232013-07-04 16:20:31 +0300358 * Front-end cache - TID lookups come in blocks,
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300359 * so most of the time we dont have to look up
360 * the full rbtree:
361 */
Adrian Hunter29ce3612014-07-16 11:07:13 +0300362 th = machine->last_match;
363 if (th && th->tid == tid) {
364 machine__update_thread_pid(machine, th, pid);
365 return th;
Adrian Hunter99d725f2013-08-26 16:00:19 +0300366 }
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300367
368 while (*p != NULL) {
369 parent = *p;
370 th = rb_entry(parent, struct thread, rb_node);
371
Adrian Hunter38051232013-07-04 16:20:31 +0300372 if (th->tid == tid) {
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300373 machine->last_match = th;
Adrian Hunter29ce3612014-07-16 11:07:13 +0300374 machine__update_thread_pid(machine, th, pid);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300375 return th;
376 }
377
Adrian Hunter38051232013-07-04 16:20:31 +0300378 if (tid < th->tid)
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300379 p = &(*p)->rb_left;
380 else
381 p = &(*p)->rb_right;
382 }
383
384 if (!create)
385 return NULL;
386
Adrian Hunter99d725f2013-08-26 16:00:19 +0300387 th = thread__new(pid, tid);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300388 if (th != NULL) {
389 rb_link_node(&th->rb_node, parent, p);
390 rb_insert_color(&th->rb_node, &machine->threads);
391 machine->last_match = th;
Jiri Olsacddcef62014-04-09 20:54:29 +0200392
393 /*
394 * We have to initialize map_groups separately
395 * after rb tree is updated.
396 *
397 * The reason is that we call machine__findnew_thread
398 * within thread__init_map_groups to find the thread
399 * leader and that would screwed the rb tree.
400 */
Adrian Hunter418029b2014-07-16 10:19:44 +0300401 if (thread__init_map_groups(th, machine)) {
402 thread__delete(th);
Jiri Olsacddcef62014-04-09 20:54:29 +0200403 return NULL;
Adrian Hunter418029b2014-07-16 10:19:44 +0300404 }
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300405 }
406
407 return th;
408}
409
Adrian Hunter314add62013-08-27 11:23:03 +0300410struct thread *machine__findnew_thread(struct machine *machine, pid_t pid,
411 pid_t tid)
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300412{
Adrian Hunter314add62013-08-27 11:23:03 +0300413 return __machine__findnew_thread(machine, pid, tid, true);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300414}
415
Jiri Olsad75e6092014-03-14 15:00:03 +0100416struct thread *machine__find_thread(struct machine *machine, pid_t pid,
417 pid_t tid)
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300418{
Jiri Olsad75e6092014-03-14 15:00:03 +0100419 return __machine__findnew_thread(machine, pid, tid, false);
Arnaldo Carvalho de Melo9d2f8e22012-10-06 15:43:20 -0300420}
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300421
Adrian Huntercfe1c412014-07-31 09:00:45 +0300422struct comm *machine__thread_exec_comm(struct machine *machine,
423 struct thread *thread)
424{
425 if (machine->comm_exec)
426 return thread__exec_comm(thread);
427 else
428 return thread__comm(thread);
429}
430
Frederic Weisbecker162f0be2013-09-11 16:18:24 +0200431int machine__process_comm_event(struct machine *machine, union perf_event *event,
432 struct perf_sample *sample)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300433{
Adrian Hunter314add62013-08-27 11:23:03 +0300434 struct thread *thread = machine__findnew_thread(machine,
435 event->comm.pid,
436 event->comm.tid);
Adrian Hunter65de51f2014-07-31 09:00:44 +0300437 bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300438
Adrian Huntercfe1c412014-07-31 09:00:45 +0300439 if (exec)
440 machine->comm_exec = true;
441
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300442 if (dump_trace)
443 perf_event__fprintf_comm(event, stdout);
444
Adrian Hunter65de51f2014-07-31 09:00:44 +0300445 if (thread == NULL ||
446 __thread__set_comm(thread, event->comm.comm, sample->time, exec)) {
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300447 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
448 return -1;
449 }
450
451 return 0;
452}
453
454int machine__process_lost_event(struct machine *machine __maybe_unused,
Frederic Weisbecker162f0be2013-09-11 16:18:24 +0200455 union perf_event *event, struct perf_sample *sample __maybe_unused)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300456{
457 dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
458 event->lost.id, event->lost.lost);
459 return 0;
460}
461
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300462struct map *machine__new_module(struct machine *machine, u64 start,
463 const char *filename)
464{
465 struct map *map;
466 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
467
468 if (dso == NULL)
469 return NULL;
470
471 map = map__new2(start, dso, MAP__FUNCTION);
472 if (map == NULL)
473 return NULL;
474
475 if (machine__is_host(machine))
476 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
477 else
478 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
479 map_groups__insert(&machine->kmaps, map);
480 return map;
481}
482
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300483size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300484{
485 struct rb_node *nd;
Waiman Long8fa7d872014-09-29 16:07:28 -0400486 size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) +
487 __dsos__fprintf(&machines->host.user_dsos.head, fp);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300488
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300489 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300490 struct machine *pos = rb_entry(nd, struct machine, rb_node);
Waiman Long8fa7d872014-09-29 16:07:28 -0400491 ret += __dsos__fprintf(&pos->kernel_dsos.head, fp);
492 ret += __dsos__fprintf(&pos->user_dsos.head, fp);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300493 }
494
495 return ret;
496}
497
Waiman Long8fa7d872014-09-29 16:07:28 -0400498size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300499 bool (skip)(struct dso *dso, int parm), int parm)
500{
Waiman Long8fa7d872014-09-29 16:07:28 -0400501 return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) +
502 __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300503}
504
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300505size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300506 bool (skip)(struct dso *dso, int parm), int parm)
507{
508 struct rb_node *nd;
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300509 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300510
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300511 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300512 struct machine *pos = rb_entry(nd, struct machine, rb_node);
513 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
514 }
515 return ret;
516}
517
518size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
519{
520 int i;
521 size_t printed = 0;
522 struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso;
523
524 if (kdso->has_build_id) {
525 char filename[PATH_MAX];
526 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
527 printed += fprintf(fp, "[0] %s\n", filename);
528 }
529
530 for (i = 0; i < vmlinux_path__nr_entries; ++i)
531 printed += fprintf(fp, "[%d] %s\n",
532 i + kdso->has_build_id, vmlinux_path[i]);
533
534 return printed;
535}
536
537size_t machine__fprintf(struct machine *machine, FILE *fp)
538{
539 size_t ret = 0;
540 struct rb_node *nd;
541
542 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
543 struct thread *pos = rb_entry(nd, struct thread, rb_node);
544
545 ret += thread__fprintf(pos, fp);
546 }
547
548 return ret;
549}
550
551static struct dso *machine__get_kernel(struct machine *machine)
552{
553 const char *vmlinux_name = NULL;
554 struct dso *kernel;
555
556 if (machine__is_host(machine)) {
557 vmlinux_name = symbol_conf.vmlinux_name;
558 if (!vmlinux_name)
559 vmlinux_name = "[kernel.kallsyms]";
560
561 kernel = dso__kernel_findnew(machine, vmlinux_name,
562 "[kernel]",
563 DSO_TYPE_KERNEL);
564 } else {
565 char bf[PATH_MAX];
566
567 if (machine__is_default_guest(machine))
568 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
569 if (!vmlinux_name)
570 vmlinux_name = machine__mmap_name(machine, bf,
571 sizeof(bf));
572
573 kernel = dso__kernel_findnew(machine, vmlinux_name,
574 "[guest.kernel]",
575 DSO_TYPE_GUEST_KERNEL);
576 }
577
578 if (kernel != NULL && (!kernel->has_build_id))
579 dso__read_running_kernel_build_id(kernel, machine);
580
581 return kernel;
582}
583
584struct process_args {
585 u64 start;
586};
587
Adrian Hunter15a0a872014-01-29 16:14:38 +0200588static void machine__get_kallsyms_filename(struct machine *machine, char *buf,
589 size_t bufsz)
590{
591 if (machine__is_default_guest(machine))
592 scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms);
593 else
594 scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir);
595}
596
Simon Quea93f0e52014-06-16 11:32:09 -0700597const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL};
598
599/* Figure out the start address of kernel map from /proc/kallsyms.
600 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
601 * symbol_name if it's not that important.
602 */
Adrian Hunter4b993752014-08-15 22:08:38 +0300603static u64 machine__get_running_kernel_start(struct machine *machine,
604 const char **symbol_name)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300605{
Adrian Hunter15a0a872014-01-29 16:14:38 +0200606 char filename[PATH_MAX];
Simon Quea93f0e52014-06-16 11:32:09 -0700607 int i;
608 const char *name;
609 u64 addr = 0;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300610
Adrian Hunter15a0a872014-01-29 16:14:38 +0200611 machine__get_kallsyms_filename(machine, filename, PATH_MAX);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300612
613 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
614 return 0;
615
Simon Quea93f0e52014-06-16 11:32:09 -0700616 for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) {
617 addr = kallsyms__get_function_start(filename, name);
618 if (addr)
619 break;
620 }
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300621
Simon Quea93f0e52014-06-16 11:32:09 -0700622 if (symbol_name)
623 *symbol_name = name;
624
625 return addr;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300626}
627
628int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
629{
630 enum map_type type;
Adrian Hunter4b993752014-08-15 22:08:38 +0300631 u64 start = machine__get_running_kernel_start(machine, NULL);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300632
633 for (type = 0; type < MAP__NR_TYPES; ++type) {
634 struct kmap *kmap;
635
636 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
637 if (machine->vmlinux_maps[type] == NULL)
638 return -1;
639
640 machine->vmlinux_maps[type]->map_ip =
641 machine->vmlinux_maps[type]->unmap_ip =
642 identity__map_ip;
643 kmap = map__kmap(machine->vmlinux_maps[type]);
644 kmap->kmaps = &machine->kmaps;
645 map_groups__insert(&machine->kmaps,
646 machine->vmlinux_maps[type]);
647 }
648
649 return 0;
650}
651
652void machine__destroy_kernel_maps(struct machine *machine)
653{
654 enum map_type type;
655
656 for (type = 0; type < MAP__NR_TYPES; ++type) {
657 struct kmap *kmap;
658
659 if (machine->vmlinux_maps[type] == NULL)
660 continue;
661
662 kmap = map__kmap(machine->vmlinux_maps[type]);
663 map_groups__remove(&machine->kmaps,
664 machine->vmlinux_maps[type]);
665 if (kmap->ref_reloc_sym) {
666 /*
667 * ref_reloc_sym is shared among all maps, so free just
668 * on one of them.
669 */
670 if (type == MAP__FUNCTION) {
Arnaldo Carvalho de Melo04662522013-12-26 17:41:15 -0300671 zfree((char **)&kmap->ref_reloc_sym->name);
672 zfree(&kmap->ref_reloc_sym);
673 } else
674 kmap->ref_reloc_sym = NULL;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300675 }
676
677 map__delete(machine->vmlinux_maps[type]);
678 machine->vmlinux_maps[type] = NULL;
679 }
680}
681
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300682int machines__create_guest_kernel_maps(struct machines *machines)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300683{
684 int ret = 0;
685 struct dirent **namelist = NULL;
686 int i, items = 0;
687 char path[PATH_MAX];
688 pid_t pid;
689 char *endp;
690
691 if (symbol_conf.default_guest_vmlinux_name ||
692 symbol_conf.default_guest_modules ||
693 symbol_conf.default_guest_kallsyms) {
694 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
695 }
696
697 if (symbol_conf.guestmount) {
698 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
699 if (items <= 0)
700 return -ENOENT;
701 for (i = 0; i < items; i++) {
702 if (!isdigit(namelist[i]->d_name[0])) {
703 /* Filter out . and .. */
704 continue;
705 }
706 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
707 if ((*endp != '\0') ||
708 (endp == namelist[i]->d_name) ||
709 (errno == ERANGE)) {
710 pr_debug("invalid directory (%s). Skipping.\n",
711 namelist[i]->d_name);
712 continue;
713 }
714 sprintf(path, "%s/%s/proc/kallsyms",
715 symbol_conf.guestmount,
716 namelist[i]->d_name);
717 ret = access(path, R_OK);
718 if (ret) {
719 pr_debug("Can't access file %s\n", path);
720 goto failure;
721 }
722 machines__create_kernel_maps(machines, pid);
723 }
724failure:
725 free(namelist);
726 }
727
728 return ret;
729}
730
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300731void machines__destroy_kernel_maps(struct machines *machines)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300732{
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300733 struct rb_node *next = rb_first(&machines->guests);
734
735 machine__destroy_kernel_maps(&machines->host);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300736
737 while (next) {
738 struct machine *pos = rb_entry(next, struct machine, rb_node);
739
740 next = rb_next(&pos->rb_node);
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300741 rb_erase(&pos->rb_node, &machines->guests);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300742 machine__delete(pos);
743 }
744}
745
Arnaldo Carvalho de Melo876650e2012-12-18 19:15:48 -0300746int machines__create_kernel_maps(struct machines *machines, pid_t pid)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300747{
748 struct machine *machine = machines__findnew(machines, pid);
749
750 if (machine == NULL)
751 return -1;
752
753 return machine__create_kernel_maps(machine);
754}
755
756int machine__load_kallsyms(struct machine *machine, const char *filename,
757 enum map_type type, symbol_filter_t filter)
758{
759 struct map *map = machine->vmlinux_maps[type];
760 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
761
762 if (ret > 0) {
763 dso__set_loaded(map->dso, type);
764 /*
765 * Since /proc/kallsyms will have multiple sessions for the
766 * kernel, with modules between them, fixup the end of all
767 * sections.
768 */
769 __map_groups__fixup_end(&machine->kmaps, type);
770 }
771
772 return ret;
773}
774
775int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
776 symbol_filter_t filter)
777{
778 struct map *map = machine->vmlinux_maps[type];
779 int ret = dso__load_vmlinux_path(map->dso, map, filter);
780
Adrian Hunter39b12f782013-08-07 14:38:47 +0300781 if (ret > 0)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300782 dso__set_loaded(map->dso, type);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300783
784 return ret;
785}
786
787static void map_groups__fixup_end(struct map_groups *mg)
788{
789 int i;
790 for (i = 0; i < MAP__NR_TYPES; ++i)
791 __map_groups__fixup_end(mg, i);
792}
793
794static char *get_kernel_version(const char *root_dir)
795{
796 char version[PATH_MAX];
797 FILE *file;
798 char *name, *tmp;
799 const char *prefix = "Linux version ";
800
801 sprintf(version, "%s/proc/version", root_dir);
802 file = fopen(version, "r");
803 if (!file)
804 return NULL;
805
806 version[0] = '\0';
807 tmp = fgets(version, sizeof(version), file);
808 fclose(file);
809
810 name = strstr(version, prefix);
811 if (!name)
812 return NULL;
813 name += strlen(prefix);
814 tmp = strchr(name, ' ');
815 if (tmp)
816 *tmp = '\0';
817
818 return strdup(name);
819}
820
821static int map_groups__set_modules_path_dir(struct map_groups *mg,
Richard Yao61d42902014-04-26 13:17:55 -0400822 const char *dir_name, int depth)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300823{
824 struct dirent *dent;
825 DIR *dir = opendir(dir_name);
826 int ret = 0;
827
828 if (!dir) {
829 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
830 return -1;
831 }
832
833 while ((dent = readdir(dir)) != NULL) {
834 char path[PATH_MAX];
835 struct stat st;
836
837 /*sshfs might return bad dent->d_type, so we have to stat*/
838 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
839 if (stat(path, &st))
840 continue;
841
842 if (S_ISDIR(st.st_mode)) {
843 if (!strcmp(dent->d_name, ".") ||
844 !strcmp(dent->d_name, ".."))
845 continue;
846
Richard Yao61d42902014-04-26 13:17:55 -0400847 /* Do not follow top-level source and build symlinks */
848 if (depth == 0) {
849 if (!strcmp(dent->d_name, "source") ||
850 !strcmp(dent->d_name, "build"))
851 continue;
852 }
853
854 ret = map_groups__set_modules_path_dir(mg, path,
855 depth + 1);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300856 if (ret < 0)
857 goto out;
858 } else {
859 char *dot = strrchr(dent->d_name, '.'),
860 dso_name[PATH_MAX];
861 struct map *map;
862 char *long_name;
863
864 if (dot == NULL || strcmp(dot, ".ko"))
865 continue;
866 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
867 (int)(dot - dent->d_name), dent->d_name);
868
869 strxfrchar(dso_name, '-', '_');
870 map = map_groups__find_by_name(mg, MAP__FUNCTION,
871 dso_name);
872 if (map == NULL)
873 continue;
874
875 long_name = strdup(path);
876 if (long_name == NULL) {
877 ret = -1;
878 goto out;
879 }
Arnaldo Carvalho de Melo7e155d42013-12-10 15:08:44 -0300880 dso__set_long_name(map->dso, long_name, true);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300881 dso__kernel_module_get_build_id(map->dso, "");
882 }
883 }
884
885out:
886 closedir(dir);
887 return ret;
888}
889
890static int machine__set_modules_path(struct machine *machine)
891{
892 char *version;
893 char modules_path[PATH_MAX];
894
895 version = get_kernel_version(machine->root_dir);
896 if (!version)
897 return -1;
898
Richard Yao61d42902014-04-26 13:17:55 -0400899 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s",
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300900 machine->root_dir, version);
901 free(version);
902
Richard Yao61d42902014-04-26 13:17:55 -0400903 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300904}
905
Adrian Hunter316d70d2013-10-08 11:45:48 +0300906static int machine__create_module(void *arg, const char *name, u64 start)
907{
908 struct machine *machine = arg;
909 struct map *map;
910
911 map = machine__new_module(machine, start, name);
912 if (map == NULL)
913 return -1;
914
915 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
916
917 return 0;
918}
919
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300920static int machine__create_modules(struct machine *machine)
921{
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300922 const char *modules;
923 char path[PATH_MAX];
924
Adrian Hunterf4be9042013-09-22 13:22:09 +0300925 if (machine__is_default_guest(machine)) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300926 modules = symbol_conf.default_guest_modules;
Adrian Hunterf4be9042013-09-22 13:22:09 +0300927 } else {
928 snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300929 modules = path;
930 }
931
Adrian Hunteraa7fe3b2013-09-22 13:22:09 +0300932 if (symbol__restricted_filename(modules, "/proc/modules"))
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300933 return -1;
934
Adrian Hunter316d70d2013-10-08 11:45:48 +0300935 if (modules__parse(modules, machine, machine__create_module))
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300936 return -1;
937
Adrian Hunter316d70d2013-10-08 11:45:48 +0300938 if (!machine__set_modules_path(machine))
939 return 0;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300940
Adrian Hunter316d70d2013-10-08 11:45:48 +0300941 pr_debug("Problems setting modules path maps, continuing anyway...\n");
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300942
Jason Wessel8f76fcd2013-07-15 15:27:53 -0500943 return 0;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300944}
945
946int machine__create_kernel_maps(struct machine *machine)
947{
948 struct dso *kernel = machine__get_kernel(machine);
Adrian Hunter5512cf22014-01-29 16:14:39 +0200949 const char *name;
Adrian Hunter4b993752014-08-15 22:08:38 +0300950 u64 addr = machine__get_running_kernel_start(machine, &name);
Adrian Hunter5512cf22014-01-29 16:14:39 +0200951 if (!addr)
952 return -1;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300953
954 if (kernel == NULL ||
955 __machine__create_kernel_maps(machine, kernel) < 0)
956 return -1;
957
958 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
959 if (machine__is_host(machine))
960 pr_debug("Problems creating module maps, "
961 "continuing anyway...\n");
962 else
963 pr_debug("Problems creating module maps for guest %d, "
964 "continuing anyway...\n", machine->pid);
965 }
966
967 /*
968 * Now that we have all the maps created, just set the ->end of them:
969 */
970 map_groups__fixup_end(&machine->kmaps);
Adrian Hunter5512cf22014-01-29 16:14:39 +0200971
972 if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name,
973 addr)) {
974 machine__destroy_kernel_maps(machine);
975 return -1;
976 }
977
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -0300978 return 0;
979}
980
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300981static void machine__set_kernel_mmap_len(struct machine *machine,
982 union perf_event *event)
983{
Namhyung Kim4552cf0f2012-11-07 16:27:10 +0900984 int i;
985
986 for (i = 0; i < MAP__NR_TYPES; i++) {
987 machine->vmlinux_maps[i]->start = event->mmap.start;
988 machine->vmlinux_maps[i]->end = (event->mmap.start +
989 event->mmap.len);
990 /*
991 * Be a bit paranoid here, some perf.data file came with
992 * a zero sized synthesized MMAP event for the kernel.
993 */
994 if (machine->vmlinux_maps[i]->end == 0)
995 machine->vmlinux_maps[i]->end = ~0ULL;
996 }
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -0300997}
998
Adrian Hunter8e0cf962013-08-07 14:38:51 +0300999static bool machine__uses_kcore(struct machine *machine)
1000{
1001 struct dso *dso;
1002
Waiman Long8fa7d872014-09-29 16:07:28 -04001003 list_for_each_entry(dso, &machine->kernel_dsos.head, node) {
Adrian Hunter8e0cf962013-08-07 14:38:51 +03001004 if (dso__is_kcore(dso))
1005 return true;
1006 }
1007
1008 return false;
1009}
1010
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001011static int machine__process_kernel_mmap_event(struct machine *machine,
1012 union perf_event *event)
1013{
1014 struct map *map;
1015 char kmmap_prefix[PATH_MAX];
1016 enum dso_kernel_type kernel_type;
1017 bool is_kernel_mmap;
1018
Adrian Hunter8e0cf962013-08-07 14:38:51 +03001019 /* If we have maps from kcore then we do not need or want any others */
1020 if (machine__uses_kcore(machine))
1021 return 0;
1022
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001023 machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix));
1024 if (machine__is_host(machine))
1025 kernel_type = DSO_TYPE_KERNEL;
1026 else
1027 kernel_type = DSO_TYPE_GUEST_KERNEL;
1028
1029 is_kernel_mmap = memcmp(event->mmap.filename,
1030 kmmap_prefix,
1031 strlen(kmmap_prefix) - 1) == 0;
1032 if (event->mmap.filename[0] == '/' ||
1033 (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
1034
1035 char short_module_name[1024];
1036 char *name, *dot;
1037
1038 if (event->mmap.filename[0] == '/') {
1039 name = strrchr(event->mmap.filename, '/');
1040 if (name == NULL)
1041 goto out_problem;
1042
1043 ++name; /* skip / */
1044 dot = strrchr(name, '.');
1045 if (dot == NULL)
1046 goto out_problem;
1047 snprintf(short_module_name, sizeof(short_module_name),
1048 "[%.*s]", (int)(dot - name), name);
1049 strxfrchar(short_module_name, '-', '_');
1050 } else
1051 strcpy(short_module_name, event->mmap.filename);
1052
1053 map = machine__new_module(machine, event->mmap.start,
1054 event->mmap.filename);
1055 if (map == NULL)
1056 goto out_problem;
1057
1058 name = strdup(short_module_name);
1059 if (name == NULL)
1060 goto out_problem;
1061
Adrian Hunter58a98c92013-12-10 11:11:46 -03001062 dso__set_short_name(map->dso, name, true);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001063 map->end = map->start + event->mmap.len;
1064 } else if (is_kernel_mmap) {
1065 const char *symbol_name = (event->mmap.filename +
1066 strlen(kmmap_prefix));
1067 /*
1068 * Should be there already, from the build-id table in
1069 * the header.
1070 */
1071 struct dso *kernel = __dsos__findnew(&machine->kernel_dsos,
1072 kmmap_prefix);
1073 if (kernel == NULL)
1074 goto out_problem;
1075
1076 kernel->kernel = kernel_type;
1077 if (__machine__create_kernel_maps(machine, kernel) < 0)
1078 goto out_problem;
1079
1080 machine__set_kernel_mmap_len(machine, event);
1081
1082 /*
1083 * Avoid using a zero address (kptr_restrict) for the ref reloc
1084 * symbol. Effectively having zero here means that at record
1085 * time /proc/sys/kernel/kptr_restrict was non zero.
1086 */
1087 if (event->mmap.pgoff != 0) {
1088 maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps,
1089 symbol_name,
1090 event->mmap.pgoff);
1091 }
1092
1093 if (machine__is_default_guest(machine)) {
1094 /*
1095 * preload dso of guest kernel and modules
1096 */
1097 dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION],
1098 NULL);
1099 }
1100 }
1101 return 0;
1102out_problem:
1103 return -1;
1104}
1105
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001106int machine__process_mmap2_event(struct machine *machine,
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001107 union perf_event *event,
1108 struct perf_sample *sample __maybe_unused)
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001109{
1110 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1111 struct thread *thread;
1112 struct map *map;
1113 enum map_type type;
1114 int ret = 0;
1115
1116 if (dump_trace)
1117 perf_event__fprintf_mmap2(event, stdout);
1118
1119 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1120 cpumode == PERF_RECORD_MISC_KERNEL) {
1121 ret = machine__process_kernel_mmap_event(machine, event);
1122 if (ret < 0)
1123 goto out_problem;
1124 return 0;
1125 }
1126
1127 thread = machine__findnew_thread(machine, event->mmap2.pid,
Don Zickus11c9abf2014-02-26 10:45:27 -05001128 event->mmap2.tid);
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001129 if (thread == NULL)
1130 goto out_problem;
1131
1132 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1133 type = MAP__VARIABLE;
1134 else
1135 type = MAP__FUNCTION;
1136
Adrian Hunter2a030682014-07-22 16:17:53 +03001137 map = map__new(machine, event->mmap2.start,
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001138 event->mmap2.len, event->mmap2.pgoff,
1139 event->mmap2.pid, event->mmap2.maj,
1140 event->mmap2.min, event->mmap2.ino,
1141 event->mmap2.ino_generation,
Don Zickus7ef80702014-05-19 15:13:49 -04001142 event->mmap2.prot,
1143 event->mmap2.flags,
Adrian Hunter5835edd2014-07-22 16:18:00 +03001144 event->mmap2.filename, type, thread);
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001145
1146 if (map == NULL)
1147 goto out_problem;
1148
1149 thread__insert_map(thread, map);
1150 return 0;
1151
1152out_problem:
1153 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1154 return 0;
1155}
1156
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001157int machine__process_mmap_event(struct machine *machine, union perf_event *event,
1158 struct perf_sample *sample __maybe_unused)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001159{
1160 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1161 struct thread *thread;
1162 struct map *map;
Stephane Eranianbad40912013-01-24 16:10:40 +01001163 enum map_type type;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001164 int ret = 0;
1165
1166 if (dump_trace)
1167 perf_event__fprintf_mmap(event, stdout);
1168
1169 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
1170 cpumode == PERF_RECORD_MISC_KERNEL) {
1171 ret = machine__process_kernel_mmap_event(machine, event);
1172 if (ret < 0)
1173 goto out_problem;
1174 return 0;
1175 }
1176
Adrian Hunter314add62013-08-27 11:23:03 +03001177 thread = machine__findnew_thread(machine, event->mmap.pid,
Don Zickus11c9abf2014-02-26 10:45:27 -05001178 event->mmap.tid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001179 if (thread == NULL)
1180 goto out_problem;
Stephane Eranianbad40912013-01-24 16:10:40 +01001181
1182 if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA)
1183 type = MAP__VARIABLE;
1184 else
1185 type = MAP__FUNCTION;
1186
Adrian Hunter2a030682014-07-22 16:17:53 +03001187 map = map__new(machine, event->mmap.start,
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001188 event->mmap.len, event->mmap.pgoff,
Don Zickus7ef80702014-05-19 15:13:49 -04001189 event->mmap.pid, 0, 0, 0, 0, 0, 0,
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001190 event->mmap.filename,
Adrian Hunter5835edd2014-07-22 16:18:00 +03001191 type, thread);
Stephane Eranianbad40912013-01-24 16:10:40 +01001192
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001193 if (map == NULL)
1194 goto out_problem;
1195
1196 thread__insert_map(thread, map);
1197 return 0;
1198
1199out_problem:
1200 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1201 return 0;
1202}
1203
David Ahern236a3bb2013-08-14 08:49:27 -06001204static void machine__remove_thread(struct machine *machine, struct thread *th)
1205{
1206 machine->last_match = NULL;
1207 rb_erase(&th->rb_node, &machine->threads);
1208 /*
1209 * We may have references to this thread, for instance in some hist_entry
1210 * instances, so just move them to a separate list.
1211 */
1212 list_add_tail(&th->node, &machine->dead_threads);
1213}
1214
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001215int machine__process_fork_event(struct machine *machine, union perf_event *event,
1216 struct perf_sample *sample)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001217{
Jiri Olsad75e6092014-03-14 15:00:03 +01001218 struct thread *thread = machine__find_thread(machine,
1219 event->fork.pid,
1220 event->fork.tid);
Adrian Hunter314add62013-08-27 11:23:03 +03001221 struct thread *parent = machine__findnew_thread(machine,
1222 event->fork.ppid,
1223 event->fork.ptid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001224
David Ahern236a3bb2013-08-14 08:49:27 -06001225 /* if a thread currently exists for the thread id remove it */
1226 if (thread != NULL)
1227 machine__remove_thread(machine, thread);
1228
Adrian Hunter314add62013-08-27 11:23:03 +03001229 thread = machine__findnew_thread(machine, event->fork.pid,
1230 event->fork.tid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001231 if (dump_trace)
1232 perf_event__fprintf_task(event, stdout);
1233
1234 if (thread == NULL || parent == NULL ||
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001235 thread__fork(thread, parent, sample->time) < 0) {
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001236 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1237 return -1;
1238 }
1239
1240 return 0;
1241}
1242
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001243int machine__process_exit_event(struct machine *machine, union perf_event *event,
1244 struct perf_sample *sample __maybe_unused)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001245{
Jiri Olsad75e6092014-03-14 15:00:03 +01001246 struct thread *thread = machine__find_thread(machine,
1247 event->fork.pid,
1248 event->fork.tid);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001249
1250 if (dump_trace)
1251 perf_event__fprintf_task(event, stdout);
1252
1253 if (thread != NULL)
David Ahern236a3bb2013-08-14 08:49:27 -06001254 thread__exited(thread);
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001255
1256 return 0;
1257}
1258
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001259int machine__process_event(struct machine *machine, union perf_event *event,
1260 struct perf_sample *sample)
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001261{
1262 int ret;
1263
1264 switch (event->header.type) {
1265 case PERF_RECORD_COMM:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001266 ret = machine__process_comm_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001267 case PERF_RECORD_MMAP:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001268 ret = machine__process_mmap_event(machine, event, sample); break;
Stephane Eranian5c5e8542013-08-21 12:10:25 +02001269 case PERF_RECORD_MMAP2:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001270 ret = machine__process_mmap2_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001271 case PERF_RECORD_FORK:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001272 ret = machine__process_fork_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001273 case PERF_RECORD_EXIT:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001274 ret = machine__process_exit_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001275 case PERF_RECORD_LOST:
Frederic Weisbecker162f0be2013-09-11 16:18:24 +02001276 ret = machine__process_lost_event(machine, event, sample); break;
Arnaldo Carvalho de Melob0a7d1a2012-10-06 16:26:02 -03001277 default:
1278 ret = -1;
1279 break;
1280 }
1281
1282 return ret;
1283}
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001284
Greg Priceb21484f2012-12-06 21:48:05 -08001285static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001286{
Greg Priceb21484f2012-12-06 21:48:05 -08001287 if (sym->name && !regexec(regex, sym->name, 0, NULL, 0))
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001288 return 1;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001289 return 0;
1290}
1291
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001292static void ip__resolve_ams(struct thread *thread,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001293 struct addr_map_symbol *ams,
1294 u64 ip)
1295{
1296 struct addr_location al;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001297
1298 memset(&al, 0, sizeof(al));
Arnaldo Carvalho de Melo52a3cb82014-03-11 16:16:49 -03001299 /*
1300 * We cannot use the header.misc hint to determine whether a
1301 * branch stack address is user, kernel, guest, hypervisor.
1302 * Branches may straddle the kernel/user/hypervisor boundaries.
1303 * Thus, we have to try consecutively until we find a match
1304 * or else, the symbol is unknown
1305 */
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001306 thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001307
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001308 ams->addr = ip;
1309 ams->al_addr = al.addr;
1310 ams->sym = al.sym;
1311 ams->map = al.map;
1312}
1313
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001314static void ip__resolve_data(struct thread *thread,
Stephane Eranian98a3b322013-01-24 16:10:35 +01001315 u8 m, struct addr_map_symbol *ams, u64 addr)
1316{
1317 struct addr_location al;
1318
1319 memset(&al, 0, sizeof(al));
1320
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001321 thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al);
Don Zickus06b2afc2014-08-20 23:25:11 -04001322 if (al.map == NULL) {
1323 /*
1324 * some shared data regions have execute bit set which puts
1325 * their mapping in the MAP__FUNCTION type array.
1326 * Check there as a fallback option before dropping the sample.
1327 */
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001328 thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al);
Don Zickus06b2afc2014-08-20 23:25:11 -04001329 }
1330
Stephane Eranian98a3b322013-01-24 16:10:35 +01001331 ams->addr = addr;
1332 ams->al_addr = al.addr;
1333 ams->sym = al.sym;
1334 ams->map = al.map;
1335}
1336
Arnaldo Carvalho de Meloe80faac2014-01-22 13:05:06 -03001337struct mem_info *sample__resolve_mem(struct perf_sample *sample,
1338 struct addr_location *al)
Stephane Eranian98a3b322013-01-24 16:10:35 +01001339{
1340 struct mem_info *mi = zalloc(sizeof(*mi));
1341
1342 if (!mi)
1343 return NULL;
1344
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001345 ip__resolve_ams(al->thread, &mi->iaddr, sample->ip);
1346 ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr);
Stephane Eranian98a3b322013-01-24 16:10:35 +01001347 mi->data_src.val = sample->data_src;
1348
1349 return mi;
1350}
1351
Arnaldo Carvalho de Melo644f2df2014-01-22 13:15:36 -03001352struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
1353 struct addr_location *al)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001354{
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001355 unsigned int i;
Arnaldo Carvalho de Melo644f2df2014-01-22 13:15:36 -03001356 const struct branch_stack *bs = sample->branch_stack;
1357 struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info));
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001358
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001359 if (!bi)
1360 return NULL;
1361
1362 for (i = 0; i < bs->nr; i++) {
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001363 ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to);
1364 ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001365 bi[i].flags = bs->entries[i].flags;
1366 }
1367 return bi;
1368}
1369
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001370static int thread__resolve_callchain_sample(struct thread *thread,
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001371 struct ip_callchain *chain,
Greg Priceb21484f2012-12-06 21:48:05 -08001372 struct symbol **parent,
Waiman Long91e95612013-10-18 10:38:48 -04001373 struct addr_location *root_al,
1374 int max_stack)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001375{
1376 u8 cpumode = PERF_RECORD_MISC_USER;
Waiman Long91e95612013-10-18 10:38:48 -04001377 int chain_nr = min(max_stack, (int)chain->nr);
1378 int i;
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001379 int j;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001380 int err;
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001381 int skip_idx __maybe_unused;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001382
1383 callchain_cursor_reset(&callchain_cursor);
1384
1385 if (chain->nr > PERF_MAX_STACK_DEPTH) {
1386 pr_warning("corrupted callchain. skipping...\n");
1387 return 0;
1388 }
1389
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001390 /*
1391 * Based on DWARF debug information, some architectures skip
1392 * a callchain entry saved by the kernel.
1393 */
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001394 skip_idx = arch_skip_callchain_idx(thread, chain);
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001395
Waiman Long91e95612013-10-18 10:38:48 -04001396 for (i = 0; i < chain_nr; i++) {
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001397 u64 ip;
1398 struct addr_location al;
1399
1400 if (callchain_param.order == ORDER_CALLEE)
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001401 j = i;
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001402 else
Sukadev Bhattiprolua60335b2014-06-25 08:49:03 -07001403 j = chain->nr - i - 1;
1404
1405#ifdef HAVE_SKIP_CALLCHAIN_IDX
1406 if (j == skip_idx)
1407 continue;
1408#endif
1409 ip = chain->ips[j];
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001410
1411 if (ip >= PERF_CONTEXT_MAX) {
1412 switch (ip) {
1413 case PERF_CONTEXT_HV:
1414 cpumode = PERF_RECORD_MISC_HYPERVISOR;
1415 break;
1416 case PERF_CONTEXT_KERNEL:
1417 cpumode = PERF_RECORD_MISC_KERNEL;
1418 break;
1419 case PERF_CONTEXT_USER:
1420 cpumode = PERF_RECORD_MISC_USER;
1421 break;
1422 default:
1423 pr_debug("invalid callchain context: "
1424 "%"PRId64"\n", (s64) ip);
1425 /*
1426 * It seems the callchain is corrupted.
1427 * Discard all.
1428 */
1429 callchain_cursor_reset(&callchain_cursor);
1430 return 0;
1431 }
1432 continue;
1433 }
1434
Namhyung Kimb3cef7f2014-03-17 16:59:21 -03001435 al.filtered = 0;
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001436 thread__find_addr_location(thread, cpumode,
Adrian Hunter61710bd2013-08-08 14:32:26 +03001437 MAP__FUNCTION, ip, &al);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001438 if (al.sym != NULL) {
1439 if (sort__has_parent && !*parent &&
Greg Priceb21484f2012-12-06 21:48:05 -08001440 symbol__match_regex(al.sym, &parent_regex))
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001441 *parent = al.sym;
Greg Priceb21484f2012-12-06 21:48:05 -08001442 else if (have_ignore_callees && root_al &&
1443 symbol__match_regex(al.sym, &ignore_callees_regex)) {
1444 /* Treat this symbol as the root,
1445 forgetting its callees. */
1446 *root_al = al;
1447 callchain_cursor_reset(&callchain_cursor);
1448 }
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001449 }
1450
1451 err = callchain_cursor_append(&callchain_cursor,
1452 ip, al.map, al.sym);
1453 if (err)
1454 return err;
1455 }
1456
1457 return 0;
1458}
1459
1460static int unwind_entry(struct unwind_entry *entry, void *arg)
1461{
1462 struct callchain_cursor *cursor = arg;
1463 return callchain_cursor_append(cursor, entry->ip,
1464 entry->map, entry->sym);
1465}
1466
Arnaldo Carvalho de Melocc8b7c22014-10-23 15:26:17 -03001467int thread__resolve_callchain(struct thread *thread,
1468 struct perf_evsel *evsel,
1469 struct perf_sample *sample,
1470 struct symbol **parent,
1471 struct addr_location *root_al,
1472 int max_stack)
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001473{
Arnaldo Carvalho de Melobb871a92014-10-23 12:50:25 -03001474 int ret = thread__resolve_callchain_sample(thread, sample->callchain,
1475 parent, root_al, max_stack);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001476 if (ret)
1477 return ret;
1478
1479 /* Can we do dwarf post unwind? */
1480 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1481 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1482 return 0;
1483
1484 /* Bail out if nothing was captured. */
1485 if ((!sample->user_regs.regs) ||
1486 (!sample->user_stack.size))
1487 return 0;
1488
Arnaldo Carvalho de Melocc8b7c22014-10-23 15:26:17 -03001489 return unwind__get_entries(unwind_entry, &callchain_cursor, thread->mg->machine,
Jiri Olsa352ea452014-01-07 13:47:25 +01001490 thread, sample, max_stack);
Arnaldo Carvalho de Melo3f067dc2012-12-07 17:39:39 -03001491
1492}
David Ahern35feee12013-09-28 13:12:58 -06001493
1494int machine__for_each_thread(struct machine *machine,
1495 int (*fn)(struct thread *thread, void *p),
1496 void *priv)
1497{
1498 struct rb_node *nd;
1499 struct thread *thread;
1500 int rc = 0;
1501
1502 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
1503 thread = rb_entry(nd, struct thread, rb_node);
1504 rc = fn(thread, priv);
1505 if (rc != 0)
1506 return rc;
1507 }
1508
1509 list_for_each_entry(thread, &machine->dead_threads, node) {
1510 rc = fn(thread, priv);
1511 if (rc != 0)
1512 return rc;
1513 }
1514 return rc;
1515}
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001516
Arnaldo Carvalho de Meloa33fbd52013-11-11 11:36:12 -03001517int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -03001518 struct target *target, struct thread_map *threads,
Arnaldo Carvalho de Meloa33fbd52013-11-11 11:36:12 -03001519 perf_event__handler_t process, bool data_mmap)
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001520{
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -03001521 if (target__has_task(target))
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001522 return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap);
Arnaldo Carvalho de Melo602ad872013-11-12 16:46:16 -03001523 else if (target__has_cpu(target))
Arnaldo Carvalho de Melo58d925d2013-11-11 11:28:02 -03001524 return perf_event__synthesize_threads(tool, process, machine, data_mmap);
1525 /* command specified */
1526 return 0;
1527}
Adrian Hunterb9d266b2014-07-22 16:17:25 +03001528
1529pid_t machine__get_current_tid(struct machine *machine, int cpu)
1530{
1531 if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid)
1532 return -1;
1533
1534 return machine->current_tid[cpu];
1535}
1536
1537int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
1538 pid_t tid)
1539{
1540 struct thread *thread;
1541
1542 if (cpu < 0)
1543 return -EINVAL;
1544
1545 if (!machine->current_tid) {
1546 int i;
1547
1548 machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t));
1549 if (!machine->current_tid)
1550 return -ENOMEM;
1551 for (i = 0; i < MAX_NR_CPUS; i++)
1552 machine->current_tid[i] = -1;
1553 }
1554
1555 if (cpu >= MAX_NR_CPUS) {
1556 pr_err("Requested CPU %d too large. ", cpu);
1557 pr_err("Consider raising MAX_NR_CPUS\n");
1558 return -EINVAL;
1559 }
1560
1561 machine->current_tid[cpu] = tid;
1562
1563 thread = machine__findnew_thread(machine, pid, tid);
1564 if (!thread)
1565 return -ENOMEM;
1566
1567 thread->cpu = cpu;
1568
1569 return 0;
1570}
Adrian Hunterfbe2af42014-08-15 22:08:39 +03001571
1572int machine__get_kernel_start(struct machine *machine)
1573{
1574 struct map *map = machine__kernel_map(machine, MAP__FUNCTION);
1575 int err = 0;
1576
1577 /*
1578 * The only addresses above 2^63 are kernel addresses of a 64-bit
1579 * kernel. Note that addresses are unsigned so that on a 32-bit system
1580 * all addresses including kernel addresses are less than 2^32. In
1581 * that case (32-bit system), if the kernel mapping is unknown, all
1582 * addresses will be assumed to be in user space - see
1583 * machine__kernel_ip().
1584 */
1585 machine->kernel_start = 1ULL << 63;
1586 if (map) {
1587 err = map__load(map, machine->symbol_filter);
1588 if (map->start)
1589 machine->kernel_start = map->start;
1590 }
1591 return err;
1592}