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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-19 20:49:41 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-19 20:49:41 -0500
commit8f55cea410dbc56114bb71a3742032070c8108d0 (patch)
tree59605f0ee961274b22f91add33f5c32459471a83 /tools/perf/util/machine.c
parentb7133a9a103655cda254987a3c0975fd9d8c443f (diff)
parente259514eef764a5286873618e34c560ecb6cff13 (diff)
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf changes from Ingo Molnar: "There are lots of improvements, the biggest changes are: Main kernel side changes: - Improve uprobes performance by adding 'pre-filtering' support, by Oleg Nesterov. - Make some POWER7 events available in sysfs, equivalent to what was done on x86, from Sukadev Bhattiprolu. - tracing updates by Steve Rostedt - mostly misc fixes and smaller improvements. - Use perf/event tracing to report PCI Express advanced errors, by Tony Luck. - Enable northbridge performance counters on AMD family 15h, by Jacob Shin. - This tracing commit: tracing: Remove the extra 4 bytes of padding in events changes the ABI. All involved parties (PowerTop in particular) seem to agree that it's safe to do now with the introduction of libtraceevent, but the devil is in the details ... Main tooling side changes: - Add 'event group view', from Namyung Kim: To use it, 'perf record' should group events when recording. And then perf report parses the saved group relation from file header and prints them together if --group option is provided. You can use the 'perf evlist' command to see event group information: $ perf record -e '{ref-cycles,cycles}' noploop 1 [ perf record: Woken up 2 times to write data ] [ perf record: Captured and wrote 0.385 MB perf.data (~16807 samples) ] $ perf evlist --group {ref-cycles,cycles} With this example, default perf report will show you each event separately. You can use --group option to enable event group view: $ perf report --group ... # group: {ref-cycles,cycles} # ======== # Samples: 7K of event 'anon group { ref-cycles, cycles }' # Event count (approx.): 6876107743 # # Overhead Command Shared Object Symbol # ................ ....... ................. .......................... 99.84% 99.76% noploop noploop [.] main 0.07% 0.00% noploop ld-2.15.so [.] strcmp 0.03% 0.00% noploop [kernel.kallsyms] [k] timerqueue_del 0.03% 0.03% noploop [kernel.kallsyms] [k] sched_clock_cpu 0.02% 0.00% noploop [kernel.kallsyms] [k] account_user_time 0.01% 0.00% noploop [kernel.kallsyms] [k] __alloc_pages_nodemask 0.00% 0.00% noploop [kernel.kallsyms] [k] native_write_msr_safe 0.00% 0.11% noploop [kernel.kallsyms] [k] _raw_spin_lock 0.00% 0.06% noploop [kernel.kallsyms] [k] find_get_page 0.00% 0.02% noploop [kernel.kallsyms] [k] rcu_check_callbacks 0.00% 0.02% noploop [kernel.kallsyms] [k] __current_kernel_time As you can see the Overhead column now contains both of ref-cycles and cycles and header line shows group information also - 'anon group { ref-cycles, cycles }'. The output is sorted by period of group leader first. - Initial GTK+ annotate browser, from Namhyung Kim. - Add option for runtime switching perf data file in perf report, just press 's' and a menu with the valid files found in the current directory will be presented, from Feng Tang. - Add support to display whole group data for raw columns, from Jiri Olsa. - Add per processor socket count aggregation in perf stat, from Stephane Eranian. - Add interval printing in 'perf stat', from Stephane Eranian. - 'perf test' improvements - Add support for wildcards in tracepoint system name, from Jiri Olsa. - Add anonymous huge page recognition, from Joshua Zhu. - perf build-id cache now can show DSOs present in a perf.data file that are not in the cache, to integrate with build-id servers being put in place by organizations such as Fedora. - perf top now shares more of the evsel config/creation routines with 'record', paving the way for further integration like 'top' snapshots, etc. - perf top now supports DWARF callchains. - Fix mmap limitations on 32-bit, fix from David Miller. - 'perf bench numa mem' NUMA performance measurement suite - ... and lots of fixes, performance improvements, cleanups and other improvements I failed to list - see the shortlog and git log for details." * 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (270 commits) perf/x86/amd: Enable northbridge performance counters on AMD family 15h perf/hwbp: Fix cleanup in case of kzalloc failure perf tools: Fix build with bison 2.3 and older. perf tools: Limit unwind support to x86 archs perf annotate: Make it to be able to skip unannotatable symbols perf gtk/annotate: Fail early if it can't annotate perf gtk/annotate: Show source lines with gray color perf gtk/annotate: Support multiple event annotation perf ui/gtk: Implement basic GTK2 annotation browser perf annotate: Fix warning message on a missing vmlinux perf buildid-cache: Add --update option uprobes/perf: Avoid uprobe_apply() whenever possible uprobes/perf: Teach trace_uprobe/perf code to use UPROBE_HANDLER_REMOVE uprobes/perf: Teach trace_uprobe/perf code to pre-filter uprobes/perf: Teach trace_uprobe/perf code to track the active perf_event's uprobes: Introduce uprobe_apply() perf: Introduce hw_perf_event->tp_target and ->tp_list uprobes/perf: Always increment trace_uprobe->nhit uprobes/tracing: Kill uprobe_trace_consumer, embed uprobe_consumer into trace_uprobe uprobes/tracing: Introduce is_trace_uprobe_enabled() ...
Diffstat (limited to 'tools/perf/util/machine.c')
-rw-r--r--tools/perf/util/machine.c784
1 files changed, 773 insertions, 11 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 1f09d0581e6b..efdb38e65a92 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1,10 +1,15 @@
1#include "callchain.h"
1#include "debug.h" 2#include "debug.h"
2#include "event.h" 3#include "event.h"
4#include "evsel.h"
5#include "hist.h"
3#include "machine.h" 6#include "machine.h"
4#include "map.h" 7#include "map.h"
8#include "sort.h"
5#include "strlist.h" 9#include "strlist.h"
6#include "thread.h" 10#include "thread.h"
7#include <stdbool.h> 11#include <stdbool.h>
12#include "unwind.h"
8 13
9int machine__init(struct machine *machine, const char *root_dir, pid_t pid) 14int machine__init(struct machine *machine, const char *root_dir, pid_t pid)
10{ 15{
@@ -48,6 +53,29 @@ static void dsos__delete(struct list_head *dsos)
48 } 53 }
49} 54}
50 55
56void machine__delete_dead_threads(struct machine *machine)
57{
58 struct thread *n, *t;
59
60 list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
61 list_del(&t->node);
62 thread__delete(t);
63 }
64}
65
66void machine__delete_threads(struct machine *machine)
67{
68 struct rb_node *nd = rb_first(&machine->threads);
69
70 while (nd) {
71 struct thread *t = rb_entry(nd, struct thread, rb_node);
72
73 rb_erase(&t->rb_node, &machine->threads);
74 nd = rb_next(nd);
75 thread__delete(t);
76 }
77}
78
51void machine__exit(struct machine *machine) 79void machine__exit(struct machine *machine)
52{ 80{
53 map_groups__exit(&machine->kmaps); 81 map_groups__exit(&machine->kmaps);
@@ -63,10 +91,22 @@ void machine__delete(struct machine *machine)
63 free(machine); 91 free(machine);
64} 92}
65 93
66struct machine *machines__add(struct rb_root *machines, pid_t pid, 94void machines__init(struct machines *machines)
95{
96 machine__init(&machines->host, "", HOST_KERNEL_ID);
97 machines->guests = RB_ROOT;
98}
99
100void machines__exit(struct machines *machines)
101{
102 machine__exit(&machines->host);
103 /* XXX exit guest */
104}
105
106struct machine *machines__add(struct machines *machines, pid_t pid,
67 const char *root_dir) 107 const char *root_dir)
68{ 108{
69 struct rb_node **p = &machines->rb_node; 109 struct rb_node **p = &machines->guests.rb_node;
70 struct rb_node *parent = NULL; 110 struct rb_node *parent = NULL;
71 struct machine *pos, *machine = malloc(sizeof(*machine)); 111 struct machine *pos, *machine = malloc(sizeof(*machine));
72 112
@@ -88,18 +128,21 @@ struct machine *machines__add(struct rb_root *machines, pid_t pid,
88 } 128 }
89 129
90 rb_link_node(&machine->rb_node, parent, p); 130 rb_link_node(&machine->rb_node, parent, p);
91 rb_insert_color(&machine->rb_node, machines); 131 rb_insert_color(&machine->rb_node, &machines->guests);
92 132
93 return machine; 133 return machine;
94} 134}
95 135
96struct machine *machines__find(struct rb_root *machines, pid_t pid) 136struct machine *machines__find(struct machines *machines, pid_t pid)
97{ 137{
98 struct rb_node **p = &machines->rb_node; 138 struct rb_node **p = &machines->guests.rb_node;
99 struct rb_node *parent = NULL; 139 struct rb_node *parent = NULL;
100 struct machine *machine; 140 struct machine *machine;
101 struct machine *default_machine = NULL; 141 struct machine *default_machine = NULL;
102 142
143 if (pid == HOST_KERNEL_ID)
144 return &machines->host;
145
103 while (*p != NULL) { 146 while (*p != NULL) {
104 parent = *p; 147 parent = *p;
105 machine = rb_entry(parent, struct machine, rb_node); 148 machine = rb_entry(parent, struct machine, rb_node);
@@ -116,7 +159,7 @@ struct machine *machines__find(struct rb_root *machines, pid_t pid)
116 return default_machine; 159 return default_machine;
117} 160}
118 161
119struct machine *machines__findnew(struct rb_root *machines, pid_t pid) 162struct machine *machines__findnew(struct machines *machines, pid_t pid)
120{ 163{
121 char path[PATH_MAX]; 164 char path[PATH_MAX];
122 const char *root_dir = ""; 165 const char *root_dir = "";
@@ -150,12 +193,12 @@ out:
150 return machine; 193 return machine;
151} 194}
152 195
153void machines__process(struct rb_root *machines, 196void machines__process_guests(struct machines *machines,
154 machine__process_t process, void *data) 197 machine__process_t process, void *data)
155{ 198{
156 struct rb_node *nd; 199 struct rb_node *nd;
157 200
158 for (nd = rb_first(machines); nd; nd = rb_next(nd)) { 201 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
159 struct machine *pos = rb_entry(nd, struct machine, rb_node); 202 struct machine *pos = rb_entry(nd, struct machine, rb_node);
160 process(pos, data); 203 process(pos, data);
161 } 204 }
@@ -175,12 +218,14 @@ char *machine__mmap_name(struct machine *machine, char *bf, size_t size)
175 return bf; 218 return bf;
176} 219}
177 220
178void machines__set_id_hdr_size(struct rb_root *machines, u16 id_hdr_size) 221void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size)
179{ 222{
180 struct rb_node *node; 223 struct rb_node *node;
181 struct machine *machine; 224 struct machine *machine;
182 225
183 for (node = rb_first(machines); node; node = rb_next(node)) { 226 machines->host.id_hdr_size = id_hdr_size;
227
228 for (node = rb_first(&machines->guests); node; node = rb_next(node)) {
184 machine = rb_entry(node, struct machine, rb_node); 229 machine = rb_entry(node, struct machine, rb_node);
185 machine->id_hdr_size = id_hdr_size; 230 machine->id_hdr_size = id_hdr_size;
186 } 231 }
@@ -264,6 +309,537 @@ int machine__process_lost_event(struct machine *machine __maybe_unused,
264 return 0; 309 return 0;
265} 310}
266 311
312struct map *machine__new_module(struct machine *machine, u64 start,
313 const char *filename)
314{
315 struct map *map;
316 struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename);
317
318 if (dso == NULL)
319 return NULL;
320
321 map = map__new2(start, dso, MAP__FUNCTION);
322 if (map == NULL)
323 return NULL;
324
325 if (machine__is_host(machine))
326 dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE;
327 else
328 dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE;
329 map_groups__insert(&machine->kmaps, map);
330 return map;
331}
332
333size_t machines__fprintf_dsos(struct machines *machines, FILE *fp)
334{
335 struct rb_node *nd;
336 size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) +
337 __dsos__fprintf(&machines->host.user_dsos, fp);
338
339 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
340 struct machine *pos = rb_entry(nd, struct machine, rb_node);
341 ret += __dsos__fprintf(&pos->kernel_dsos, fp);
342 ret += __dsos__fprintf(&pos->user_dsos, fp);
343 }
344
345 return ret;
346}
347
348size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
349 bool (skip)(struct dso *dso, int parm), int parm)
350{
351 return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) +
352 __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm);
353}
354
355size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
356 bool (skip)(struct dso *dso, int parm), int parm)
357{
358 struct rb_node *nd;
359 size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm);
360
361 for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) {
362 struct machine *pos = rb_entry(nd, struct machine, rb_node);
363 ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm);
364 }
365 return ret;
366}
367
368size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp)
369{
370 int i;
371 size_t printed = 0;
372 struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso;
373
374 if (kdso->has_build_id) {
375 char filename[PATH_MAX];
376 if (dso__build_id_filename(kdso, filename, sizeof(filename)))
377 printed += fprintf(fp, "[0] %s\n", filename);
378 }
379
380 for (i = 0; i < vmlinux_path__nr_entries; ++i)
381 printed += fprintf(fp, "[%d] %s\n",
382 i + kdso->has_build_id, vmlinux_path[i]);
383
384 return printed;
385}
386
387size_t machine__fprintf(struct machine *machine, FILE *fp)
388{
389 size_t ret = 0;
390 struct rb_node *nd;
391
392 for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) {
393 struct thread *pos = rb_entry(nd, struct thread, rb_node);
394
395 ret += thread__fprintf(pos, fp);
396 }
397
398 return ret;
399}
400
401static struct dso *machine__get_kernel(struct machine *machine)
402{
403 const char *vmlinux_name = NULL;
404 struct dso *kernel;
405
406 if (machine__is_host(machine)) {
407 vmlinux_name = symbol_conf.vmlinux_name;
408 if (!vmlinux_name)
409 vmlinux_name = "[kernel.kallsyms]";
410
411 kernel = dso__kernel_findnew(machine, vmlinux_name,
412 "[kernel]",
413 DSO_TYPE_KERNEL);
414 } else {
415 char bf[PATH_MAX];
416
417 if (machine__is_default_guest(machine))
418 vmlinux_name = symbol_conf.default_guest_vmlinux_name;
419 if (!vmlinux_name)
420 vmlinux_name = machine__mmap_name(machine, bf,
421 sizeof(bf));
422
423 kernel = dso__kernel_findnew(machine, vmlinux_name,
424 "[guest.kernel]",
425 DSO_TYPE_GUEST_KERNEL);
426 }
427
428 if (kernel != NULL && (!kernel->has_build_id))
429 dso__read_running_kernel_build_id(kernel, machine);
430
431 return kernel;
432}
433
434struct process_args {
435 u64 start;
436};
437
438static int symbol__in_kernel(void *arg, const char *name,
439 char type __maybe_unused, u64 start)
440{
441 struct process_args *args = arg;
442
443 if (strchr(name, '['))
444 return 0;
445
446 args->start = start;
447 return 1;
448}
449
450/* Figure out the start address of kernel map from /proc/kallsyms */
451static u64 machine__get_kernel_start_addr(struct machine *machine)
452{
453 const char *filename;
454 char path[PATH_MAX];
455 struct process_args args;
456
457 if (machine__is_host(machine)) {
458 filename = "/proc/kallsyms";
459 } else {
460 if (machine__is_default_guest(machine))
461 filename = (char *)symbol_conf.default_guest_kallsyms;
462 else {
463 sprintf(path, "%s/proc/kallsyms", machine->root_dir);
464 filename = path;
465 }
466 }
467
468 if (symbol__restricted_filename(filename, "/proc/kallsyms"))
469 return 0;
470
471 if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0)
472 return 0;
473
474 return args.start;
475}
476
477int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
478{
479 enum map_type type;
480 u64 start = machine__get_kernel_start_addr(machine);
481
482 for (type = 0; type < MAP__NR_TYPES; ++type) {
483 struct kmap *kmap;
484
485 machine->vmlinux_maps[type] = map__new2(start, kernel, type);
486 if (machine->vmlinux_maps[type] == NULL)
487 return -1;
488
489 machine->vmlinux_maps[type]->map_ip =
490 machine->vmlinux_maps[type]->unmap_ip =
491 identity__map_ip;
492 kmap = map__kmap(machine->vmlinux_maps[type]);
493 kmap->kmaps = &machine->kmaps;
494 map_groups__insert(&machine->kmaps,
495 machine->vmlinux_maps[type]);
496 }
497
498 return 0;
499}
500
501void machine__destroy_kernel_maps(struct machine *machine)
502{
503 enum map_type type;
504
505 for (type = 0; type < MAP__NR_TYPES; ++type) {
506 struct kmap *kmap;
507
508 if (machine->vmlinux_maps[type] == NULL)
509 continue;
510
511 kmap = map__kmap(machine->vmlinux_maps[type]);
512 map_groups__remove(&machine->kmaps,
513 machine->vmlinux_maps[type]);
514 if (kmap->ref_reloc_sym) {
515 /*
516 * ref_reloc_sym is shared among all maps, so free just
517 * on one of them.
518 */
519 if (type == MAP__FUNCTION) {
520 free((char *)kmap->ref_reloc_sym->name);
521 kmap->ref_reloc_sym->name = NULL;
522 free(kmap->ref_reloc_sym);
523 }
524 kmap->ref_reloc_sym = NULL;
525 }
526
527 map__delete(machine->vmlinux_maps[type]);
528 machine->vmlinux_maps[type] = NULL;
529 }
530}
531
532int machines__create_guest_kernel_maps(struct machines *machines)
533{
534 int ret = 0;
535 struct dirent **namelist = NULL;
536 int i, items = 0;
537 char path[PATH_MAX];
538 pid_t pid;
539 char *endp;
540
541 if (symbol_conf.default_guest_vmlinux_name ||
542 symbol_conf.default_guest_modules ||
543 symbol_conf.default_guest_kallsyms) {
544 machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID);
545 }
546
547 if (symbol_conf.guestmount) {
548 items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL);
549 if (items <= 0)
550 return -ENOENT;
551 for (i = 0; i < items; i++) {
552 if (!isdigit(namelist[i]->d_name[0])) {
553 /* Filter out . and .. */
554 continue;
555 }
556 pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10);
557 if ((*endp != '\0') ||
558 (endp == namelist[i]->d_name) ||
559 (errno == ERANGE)) {
560 pr_debug("invalid directory (%s). Skipping.\n",
561 namelist[i]->d_name);
562 continue;
563 }
564 sprintf(path, "%s/%s/proc/kallsyms",
565 symbol_conf.guestmount,
566 namelist[i]->d_name);
567 ret = access(path, R_OK);
568 if (ret) {
569 pr_debug("Can't access file %s\n", path);
570 goto failure;
571 }
572 machines__create_kernel_maps(machines, pid);
573 }
574failure:
575 free(namelist);
576 }
577
578 return ret;
579}
580
581void machines__destroy_kernel_maps(struct machines *machines)
582{
583 struct rb_node *next = rb_first(&machines->guests);
584
585 machine__destroy_kernel_maps(&machines->host);
586
587 while (next) {
588 struct machine *pos = rb_entry(next, struct machine, rb_node);
589
590 next = rb_next(&pos->rb_node);
591 rb_erase(&pos->rb_node, &machines->guests);
592 machine__delete(pos);
593 }
594}
595
596int machines__create_kernel_maps(struct machines *machines, pid_t pid)
597{
598 struct machine *machine = machines__findnew(machines, pid);
599
600 if (machine == NULL)
601 return -1;
602
603 return machine__create_kernel_maps(machine);
604}
605
606int machine__load_kallsyms(struct machine *machine, const char *filename,
607 enum map_type type, symbol_filter_t filter)
608{
609 struct map *map = machine->vmlinux_maps[type];
610 int ret = dso__load_kallsyms(map->dso, filename, map, filter);
611
612 if (ret > 0) {
613 dso__set_loaded(map->dso, type);
614 /*
615 * Since /proc/kallsyms will have multiple sessions for the
616 * kernel, with modules between them, fixup the end of all
617 * sections.
618 */
619 __map_groups__fixup_end(&machine->kmaps, type);
620 }
621
622 return ret;
623}
624
625int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
626 symbol_filter_t filter)
627{
628 struct map *map = machine->vmlinux_maps[type];
629 int ret = dso__load_vmlinux_path(map->dso, map, filter);
630
631 if (ret > 0) {
632 dso__set_loaded(map->dso, type);
633 map__reloc_vmlinux(map);
634 }
635
636 return ret;
637}
638
639static void map_groups__fixup_end(struct map_groups *mg)
640{
641 int i;
642 for (i = 0; i < MAP__NR_TYPES; ++i)
643 __map_groups__fixup_end(mg, i);
644}
645
646static char *get_kernel_version(const char *root_dir)
647{
648 char version[PATH_MAX];
649 FILE *file;
650 char *name, *tmp;
651 const char *prefix = "Linux version ";
652
653 sprintf(version, "%s/proc/version", root_dir);
654 file = fopen(version, "r");
655 if (!file)
656 return NULL;
657
658 version[0] = '\0';
659 tmp = fgets(version, sizeof(version), file);
660 fclose(file);
661
662 name = strstr(version, prefix);
663 if (!name)
664 return NULL;
665 name += strlen(prefix);
666 tmp = strchr(name, ' ');
667 if (tmp)
668 *tmp = '\0';
669
670 return strdup(name);
671}
672
673static int map_groups__set_modules_path_dir(struct map_groups *mg,
674 const char *dir_name)
675{
676 struct dirent *dent;
677 DIR *dir = opendir(dir_name);
678 int ret = 0;
679
680 if (!dir) {
681 pr_debug("%s: cannot open %s dir\n", __func__, dir_name);
682 return -1;
683 }
684
685 while ((dent = readdir(dir)) != NULL) {
686 char path[PATH_MAX];
687 struct stat st;
688
689 /*sshfs might return bad dent->d_type, so we have to stat*/
690 snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name);
691 if (stat(path, &st))
692 continue;
693
694 if (S_ISDIR(st.st_mode)) {
695 if (!strcmp(dent->d_name, ".") ||
696 !strcmp(dent->d_name, ".."))
697 continue;
698
699 ret = map_groups__set_modules_path_dir(mg, path);
700 if (ret < 0)
701 goto out;
702 } else {
703 char *dot = strrchr(dent->d_name, '.'),
704 dso_name[PATH_MAX];
705 struct map *map;
706 char *long_name;
707
708 if (dot == NULL || strcmp(dot, ".ko"))
709 continue;
710 snprintf(dso_name, sizeof(dso_name), "[%.*s]",
711 (int)(dot - dent->d_name), dent->d_name);
712
713 strxfrchar(dso_name, '-', '_');
714 map = map_groups__find_by_name(mg, MAP__FUNCTION,
715 dso_name);
716 if (map == NULL)
717 continue;
718
719 long_name = strdup(path);
720 if (long_name == NULL) {
721 ret = -1;
722 goto out;
723 }
724 dso__set_long_name(map->dso, long_name);
725 map->dso->lname_alloc = 1;
726 dso__kernel_module_get_build_id(map->dso, "");
727 }
728 }
729
730out:
731 closedir(dir);
732 return ret;
733}
734
735static int machine__set_modules_path(struct machine *machine)
736{
737 char *version;
738 char modules_path[PATH_MAX];
739
740 version = get_kernel_version(machine->root_dir);
741 if (!version)
742 return -1;
743
744 snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel",
745 machine->root_dir, version);
746 free(version);
747
748 return map_groups__set_modules_path_dir(&machine->kmaps, modules_path);
749}
750
751static int machine__create_modules(struct machine *machine)
752{
753 char *line = NULL;
754 size_t n;
755 FILE *file;
756 struct map *map;
757 const char *modules;
758 char path[PATH_MAX];
759
760 if (machine__is_default_guest(machine))
761 modules = symbol_conf.default_guest_modules;
762 else {
763 sprintf(path, "%s/proc/modules", machine->root_dir);
764 modules = path;
765 }
766
767 if (symbol__restricted_filename(path, "/proc/modules"))
768 return -1;
769
770 file = fopen(modules, "r");
771 if (file == NULL)
772 return -1;
773
774 while (!feof(file)) {
775 char name[PATH_MAX];
776 u64 start;
777 char *sep;
778 int line_len;
779
780 line_len = getline(&line, &n, file);
781 if (line_len < 0)
782 break;
783
784 if (!line)
785 goto out_failure;
786
787 line[--line_len] = '\0'; /* \n */
788
789 sep = strrchr(line, 'x');
790 if (sep == NULL)
791 continue;
792
793 hex2u64(sep + 1, &start);
794
795 sep = strchr(line, ' ');
796 if (sep == NULL)
797 continue;
798
799 *sep = '\0';
800
801 snprintf(name, sizeof(name), "[%s]", line);
802 map = machine__new_module(machine, start, name);
803 if (map == NULL)
804 goto out_delete_line;
805 dso__kernel_module_get_build_id(map->dso, machine->root_dir);
806 }
807
808 free(line);
809 fclose(file);
810
811 return machine__set_modules_path(machine);
812
813out_delete_line:
814 free(line);
815out_failure:
816 return -1;
817}
818
819int machine__create_kernel_maps(struct machine *machine)
820{
821 struct dso *kernel = machine__get_kernel(machine);
822
823 if (kernel == NULL ||
824 __machine__create_kernel_maps(machine, kernel) < 0)
825 return -1;
826
827 if (symbol_conf.use_modules && machine__create_modules(machine) < 0) {
828 if (machine__is_host(machine))
829 pr_debug("Problems creating module maps, "
830 "continuing anyway...\n");
831 else
832 pr_debug("Problems creating module maps for guest %d, "
833 "continuing anyway...\n", machine->pid);
834 }
835
836 /*
837 * Now that we have all the maps created, just set the ->end of them:
838 */
839 map_groups__fixup_end(&machine->kmaps);
840 return 0;
841}
842
267static void machine__set_kernel_mmap_len(struct machine *machine, 843static void machine__set_kernel_mmap_len(struct machine *machine,
268 union perf_event *event) 844 union perf_event *event)
269{ 845{
@@ -462,3 +1038,189 @@ int machine__process_event(struct machine *machine, union perf_event *event)
462 1038
463 return ret; 1039 return ret;
464} 1040}
1041
1042void machine__remove_thread(struct machine *machine, struct thread *th)
1043{
1044 machine->last_match = NULL;
1045 rb_erase(&th->rb_node, &machine->threads);
1046 /*
1047 * We may have references to this thread, for instance in some hist_entry
1048 * instances, so just move them to a separate list.
1049 */
1050 list_add_tail(&th->node, &machine->dead_threads);
1051}
1052
1053static bool symbol__match_parent_regex(struct symbol *sym)
1054{
1055 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
1056 return 1;
1057
1058 return 0;
1059}
1060
1061static const u8 cpumodes[] = {
1062 PERF_RECORD_MISC_USER,
1063 PERF_RECORD_MISC_KERNEL,
1064 PERF_RECORD_MISC_GUEST_USER,
1065 PERF_RECORD_MISC_GUEST_KERNEL
1066};
1067#define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
1068
1069static void ip__resolve_ams(struct machine *machine, struct thread *thread,
1070 struct addr_map_symbol *ams,
1071 u64 ip)
1072{
1073 struct addr_location al;
1074 size_t i;
1075 u8 m;
1076
1077 memset(&al, 0, sizeof(al));
1078
1079 for (i = 0; i < NCPUMODES; i++) {
1080 m = cpumodes[i];
1081 /*
1082 * We cannot use the header.misc hint to determine whether a
1083 * branch stack address is user, kernel, guest, hypervisor.
1084 * Branches may straddle the kernel/user/hypervisor boundaries.
1085 * Thus, we have to try consecutively until we find a match
1086 * or else, the symbol is unknown
1087 */
1088 thread__find_addr_location(thread, machine, m, MAP__FUNCTION,
1089 ip, &al, NULL);
1090 if (al.sym)
1091 goto found;
1092 }
1093found:
1094 ams->addr = ip;
1095 ams->al_addr = al.addr;
1096 ams->sym = al.sym;
1097 ams->map = al.map;
1098}
1099
1100struct branch_info *machine__resolve_bstack(struct machine *machine,
1101 struct thread *thr,
1102 struct branch_stack *bs)
1103{
1104 struct branch_info *bi;
1105 unsigned int i;
1106
1107 bi = calloc(bs->nr, sizeof(struct branch_info));
1108 if (!bi)
1109 return NULL;
1110
1111 for (i = 0; i < bs->nr; i++) {
1112 ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to);
1113 ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from);
1114 bi[i].flags = bs->entries[i].flags;
1115 }
1116 return bi;
1117}
1118
1119static int machine__resolve_callchain_sample(struct machine *machine,
1120 struct thread *thread,
1121 struct ip_callchain *chain,
1122 struct symbol **parent)
1123
1124{
1125 u8 cpumode = PERF_RECORD_MISC_USER;
1126 unsigned int i;
1127 int err;
1128
1129 callchain_cursor_reset(&callchain_cursor);
1130
1131 if (chain->nr > PERF_MAX_STACK_DEPTH) {
1132 pr_warning("corrupted callchain. skipping...\n");
1133 return 0;
1134 }
1135
1136 for (i = 0; i < chain->nr; i++) {
1137 u64 ip;
1138 struct addr_location al;
1139
1140 if (callchain_param.order == ORDER_CALLEE)
1141 ip = chain->ips[i];
1142 else
1143 ip = chain->ips[chain->nr - i - 1];
1144
1145 if (ip >= PERF_CONTEXT_MAX) {
1146 switch (ip) {
1147 case PERF_CONTEXT_HV:
1148 cpumode = PERF_RECORD_MISC_HYPERVISOR;
1149 break;
1150 case PERF_CONTEXT_KERNEL:
1151 cpumode = PERF_RECORD_MISC_KERNEL;
1152 break;
1153 case PERF_CONTEXT_USER:
1154 cpumode = PERF_RECORD_MISC_USER;
1155 break;
1156 default:
1157 pr_debug("invalid callchain context: "
1158 "%"PRId64"\n", (s64) ip);
1159 /*
1160 * It seems the callchain is corrupted.
1161 * Discard all.
1162 */
1163 callchain_cursor_reset(&callchain_cursor);
1164 return 0;
1165 }
1166 continue;
1167 }
1168
1169 al.filtered = false;
1170 thread__find_addr_location(thread, machine, cpumode,
1171 MAP__FUNCTION, ip, &al, NULL);
1172 if (al.sym != NULL) {
1173 if (sort__has_parent && !*parent &&
1174 symbol__match_parent_regex(al.sym))
1175 *parent = al.sym;
1176 if (!symbol_conf.use_callchain)
1177 break;
1178 }
1179
1180 err = callchain_cursor_append(&callchain_cursor,
1181 ip, al.map, al.sym);
1182 if (err)
1183 return err;
1184 }
1185
1186 return 0;
1187}
1188
1189static int unwind_entry(struct unwind_entry *entry, void *arg)
1190{
1191 struct callchain_cursor *cursor = arg;
1192 return callchain_cursor_append(cursor, entry->ip,
1193 entry->map, entry->sym);
1194}
1195
1196int machine__resolve_callchain(struct machine *machine,
1197 struct perf_evsel *evsel,
1198 struct thread *thread,
1199 struct perf_sample *sample,
1200 struct symbol **parent)
1201
1202{
1203 int ret;
1204
1205 callchain_cursor_reset(&callchain_cursor);
1206
1207 ret = machine__resolve_callchain_sample(machine, thread,
1208 sample->callchain, parent);
1209 if (ret)
1210 return ret;
1211
1212 /* Can we do dwarf post unwind? */
1213 if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
1214 (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
1215 return 0;
1216
1217 /* Bail out if nothing was captured. */
1218 if ((!sample->user_regs.regs) ||
1219 (!sample->user_stack.size))
1220 return 0;
1221
1222 return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
1223 thread, evsel->attr.sample_regs_user,
1224 sample);
1225
1226}
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-03 22:26:22 -0500