17 #include <sys/types.h>
21 #include "linux/hash.h"
24 #include "sane_ctype.h"
25 #include <symbol/kallsyms.h>
27 static void __machine__remove_thread(struct machine
*machine
, struct thread
*th
, bool lock
);
29 static void dsos__init(struct dsos
*dsos
)
31 INIT_LIST_HEAD(&dsos
->head
);
33 pthread_rwlock_init(&dsos
->lock
, NULL
);
36 int machine__init(struct machine
*machine
, const char *root_dir
, pid_t pid
)
38 memset(machine
, 0, sizeof(*machine
));
39 map_groups__init(&machine
->kmaps
, machine
);
40 RB_CLEAR_NODE(&machine
->rb_node
);
41 dsos__init(&machine
->dsos
);
43 machine
->threads
= RB_ROOT
;
44 pthread_rwlock_init(&machine
->threads_lock
, NULL
);
45 machine
->nr_threads
= 0;
46 INIT_LIST_HEAD(&machine
->dead_threads
);
47 machine
->last_match
= NULL
;
49 machine
->vdso_info
= NULL
;
54 machine
->id_hdr_size
= 0;
55 machine
->kptr_restrict_warned
= false;
56 machine
->comm_exec
= false;
57 machine
->kernel_start
= 0;
59 memset(machine
->vmlinux_maps
, 0, sizeof(machine
->vmlinux_maps
));
61 machine
->root_dir
= strdup(root_dir
);
62 if (machine
->root_dir
== NULL
)
65 if (pid
!= HOST_KERNEL_ID
) {
66 struct thread
*thread
= machine__findnew_thread(machine
, -1,
73 snprintf(comm
, sizeof(comm
), "[guest/%d]", pid
);
74 thread__set_comm(thread
, comm
, 0);
78 machine
->current_tid
= NULL
;
83 struct machine
*machine__new_host(void)
85 struct machine
*machine
= malloc(sizeof(*machine
));
87 if (machine
!= NULL
) {
88 machine__init(machine
, "", HOST_KERNEL_ID
);
90 if (machine__create_kernel_maps(machine
) < 0)
100 struct machine
*machine__new_kallsyms(void)
102 struct machine
*machine
= machine__new_host();
105 * 1) MAP__FUNCTION will go away when we stop loading separate maps for
106 * functions and data objects.
107 * 2) We should switch to machine__load_kallsyms(), i.e. not explicitely
108 * ask for not using the kcore parsing code, once this one is fixed
109 * to create a map per module.
111 if (machine
&& __machine__load_kallsyms(machine
, "/proc/kallsyms", MAP__FUNCTION
, true) <= 0) {
112 machine__delete(machine
);
119 static void dsos__purge(struct dsos
*dsos
)
123 pthread_rwlock_wrlock(&dsos
->lock
);
125 list_for_each_entry_safe(pos
, n
, &dsos
->head
, node
) {
126 RB_CLEAR_NODE(&pos
->rb_node
);
128 list_del_init(&pos
->node
);
132 pthread_rwlock_unlock(&dsos
->lock
);
135 static void dsos__exit(struct dsos
*dsos
)
138 pthread_rwlock_destroy(&dsos
->lock
);
141 void machine__delete_threads(struct machine
*machine
)
145 pthread_rwlock_wrlock(&machine
->threads_lock
);
146 nd
= rb_first(&machine
->threads
);
148 struct thread
*t
= rb_entry(nd
, struct thread
, rb_node
);
151 __machine__remove_thread(machine
, t
, false);
153 pthread_rwlock_unlock(&machine
->threads_lock
);
156 void machine__exit(struct machine
*machine
)
158 machine__destroy_kernel_maps(machine
);
159 map_groups__exit(&machine
->kmaps
);
160 dsos__exit(&machine
->dsos
);
161 machine__exit_vdso(machine
);
162 zfree(&machine
->root_dir
);
163 zfree(&machine
->current_tid
);
164 pthread_rwlock_destroy(&machine
->threads_lock
);
167 void machine__delete(struct machine
*machine
)
170 machine__exit(machine
);
175 void machines__init(struct machines
*machines
)
177 machine__init(&machines
->host
, "", HOST_KERNEL_ID
);
178 machines
->guests
= RB_ROOT
;
181 void machines__exit(struct machines
*machines
)
183 machine__exit(&machines
->host
);
187 struct machine
*machines__add(struct machines
*machines
, pid_t pid
,
188 const char *root_dir
)
190 struct rb_node
**p
= &machines
->guests
.rb_node
;
191 struct rb_node
*parent
= NULL
;
192 struct machine
*pos
, *machine
= malloc(sizeof(*machine
));
197 if (machine__init(machine
, root_dir
, pid
) != 0) {
204 pos
= rb_entry(parent
, struct machine
, rb_node
);
211 rb_link_node(&machine
->rb_node
, parent
, p
);
212 rb_insert_color(&machine
->rb_node
, &machines
->guests
);
217 void machines__set_comm_exec(struct machines
*machines
, bool comm_exec
)
221 machines
->host
.comm_exec
= comm_exec
;
223 for (nd
= rb_first(&machines
->guests
); nd
; nd
= rb_next(nd
)) {
224 struct machine
*machine
= rb_entry(nd
, struct machine
, rb_node
);
226 machine
->comm_exec
= comm_exec
;
230 struct machine
*machines__find(struct machines
*machines
, pid_t pid
)
232 struct rb_node
**p
= &machines
->guests
.rb_node
;
233 struct rb_node
*parent
= NULL
;
234 struct machine
*machine
;
235 struct machine
*default_machine
= NULL
;
237 if (pid
== HOST_KERNEL_ID
)
238 return &machines
->host
;
242 machine
= rb_entry(parent
, struct machine
, rb_node
);
243 if (pid
< machine
->pid
)
245 else if (pid
> machine
->pid
)
250 default_machine
= machine
;
253 return default_machine
;
256 struct machine
*machines__findnew(struct machines
*machines
, pid_t pid
)
259 const char *root_dir
= "";
260 struct machine
*machine
= machines__find(machines
, pid
);
262 if (machine
&& (machine
->pid
== pid
))
265 if ((pid
!= HOST_KERNEL_ID
) &&
266 (pid
!= DEFAULT_GUEST_KERNEL_ID
) &&
267 (symbol_conf
.guestmount
)) {
268 sprintf(path
, "%s/%d", symbol_conf
.guestmount
, pid
);
269 if (access(path
, R_OK
)) {
270 static struct strlist
*seen
;
273 seen
= strlist__new(NULL
, NULL
);
275 if (!strlist__has_entry(seen
, path
)) {
276 pr_err("Can't access file %s\n", path
);
277 strlist__add(seen
, path
);
285 machine
= machines__add(machines
, pid
, root_dir
);
290 void machines__process_guests(struct machines
*machines
,
291 machine__process_t process
, void *data
)
295 for (nd
= rb_first(&machines
->guests
); nd
; nd
= rb_next(nd
)) {
296 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
301 char *machine__mmap_name(struct machine
*machine
, char *bf
, size_t size
)
303 if (machine__is_host(machine
))
304 snprintf(bf
, size
, "[%s]", "kernel.kallsyms");
305 else if (machine__is_default_guest(machine
))
306 snprintf(bf
, size
, "[%s]", "guest.kernel.kallsyms");
308 snprintf(bf
, size
, "[%s.%d]", "guest.kernel.kallsyms",
315 void machines__set_id_hdr_size(struct machines
*machines
, u16 id_hdr_size
)
317 struct rb_node
*node
;
318 struct machine
*machine
;
320 machines
->host
.id_hdr_size
= id_hdr_size
;
322 for (node
= rb_first(&machines
->guests
); node
; node
= rb_next(node
)) {
323 machine
= rb_entry(node
, struct machine
, rb_node
);
324 machine
->id_hdr_size
= id_hdr_size
;
330 static void machine__update_thread_pid(struct machine
*machine
,
331 struct thread
*th
, pid_t pid
)
333 struct thread
*leader
;
335 if (pid
== th
->pid_
|| pid
== -1 || th
->pid_
!= -1)
340 if (th
->pid_
== th
->tid
)
343 leader
= __machine__findnew_thread(machine
, th
->pid_
, th
->pid_
);
348 leader
->mg
= map_groups__new(machine
);
353 if (th
->mg
== leader
->mg
)
358 * Maps are created from MMAP events which provide the pid and
359 * tid. Consequently there never should be any maps on a thread
360 * with an unknown pid. Just print an error if there are.
362 if (!map_groups__empty(th
->mg
))
363 pr_err("Discarding thread maps for %d:%d\n",
365 map_groups__put(th
->mg
);
368 th
->mg
= map_groups__get(leader
->mg
);
373 pr_err("Failed to join map groups for %d:%d\n", th
->pid_
, th
->tid
);
378 * Caller must eventually drop thread->refcnt returned with a successful
379 * lookup/new thread inserted.
381 static struct thread
*____machine__findnew_thread(struct machine
*machine
,
382 pid_t pid
, pid_t tid
,
385 struct rb_node
**p
= &machine
->threads
.rb_node
;
386 struct rb_node
*parent
= NULL
;
390 * Front-end cache - TID lookups come in blocks,
391 * so most of the time we dont have to look up
394 th
= machine
->last_match
;
396 if (th
->tid
== tid
) {
397 machine__update_thread_pid(machine
, th
, pid
);
398 return thread__get(th
);
401 machine
->last_match
= NULL
;
406 th
= rb_entry(parent
, struct thread
, rb_node
);
408 if (th
->tid
== tid
) {
409 machine
->last_match
= th
;
410 machine__update_thread_pid(machine
, th
, pid
);
411 return thread__get(th
);
423 th
= thread__new(pid
, tid
);
425 rb_link_node(&th
->rb_node
, parent
, p
);
426 rb_insert_color(&th
->rb_node
, &machine
->threads
);
429 * We have to initialize map_groups separately
430 * after rb tree is updated.
432 * The reason is that we call machine__findnew_thread
433 * within thread__init_map_groups to find the thread
434 * leader and that would screwed the rb tree.
436 if (thread__init_map_groups(th
, machine
)) {
437 rb_erase_init(&th
->rb_node
, &machine
->threads
);
438 RB_CLEAR_NODE(&th
->rb_node
);
443 * It is now in the rbtree, get a ref
446 machine
->last_match
= th
;
447 ++machine
->nr_threads
;
453 struct thread
*__machine__findnew_thread(struct machine
*machine
, pid_t pid
, pid_t tid
)
455 return ____machine__findnew_thread(machine
, pid
, tid
, true);
458 struct thread
*machine__findnew_thread(struct machine
*machine
, pid_t pid
,
463 pthread_rwlock_wrlock(&machine
->threads_lock
);
464 th
= __machine__findnew_thread(machine
, pid
, tid
);
465 pthread_rwlock_unlock(&machine
->threads_lock
);
469 struct thread
*machine__find_thread(struct machine
*machine
, pid_t pid
,
473 pthread_rwlock_rdlock(&machine
->threads_lock
);
474 th
= ____machine__findnew_thread(machine
, pid
, tid
, false);
475 pthread_rwlock_unlock(&machine
->threads_lock
);
479 struct comm
*machine__thread_exec_comm(struct machine
*machine
,
480 struct thread
*thread
)
482 if (machine
->comm_exec
)
483 return thread__exec_comm(thread
);
485 return thread__comm(thread
);
488 int machine__process_comm_event(struct machine
*machine
, union perf_event
*event
,
489 struct perf_sample
*sample
)
491 struct thread
*thread
= machine__findnew_thread(machine
,
494 bool exec
= event
->header
.misc
& PERF_RECORD_MISC_COMM_EXEC
;
498 machine
->comm_exec
= true;
501 perf_event__fprintf_comm(event
, stdout
);
503 if (thread
== NULL
||
504 __thread__set_comm(thread
, event
->comm
.comm
, sample
->time
, exec
)) {
505 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
514 int machine__process_namespaces_event(struct machine
*machine __maybe_unused
,
515 union perf_event
*event
,
516 struct perf_sample
*sample __maybe_unused
)
518 struct thread
*thread
= machine__findnew_thread(machine
,
519 event
->namespaces
.pid
,
520 event
->namespaces
.tid
);
523 WARN_ONCE(event
->namespaces
.nr_namespaces
> NR_NAMESPACES
,
524 "\nWARNING: kernel seems to support more namespaces than perf"
525 " tool.\nTry updating the perf tool..\n\n");
527 WARN_ONCE(event
->namespaces
.nr_namespaces
< NR_NAMESPACES
,
528 "\nWARNING: perf tool seems to support more namespaces than"
529 " the kernel.\nTry updating the kernel..\n\n");
532 perf_event__fprintf_namespaces(event
, stdout
);
534 if (thread
== NULL
||
535 thread__set_namespaces(thread
, sample
->time
, &event
->namespaces
)) {
536 dump_printf("problem processing PERF_RECORD_NAMESPACES, skipping event.\n");
545 int machine__process_lost_event(struct machine
*machine __maybe_unused
,
546 union perf_event
*event
, struct perf_sample
*sample __maybe_unused
)
548 dump_printf(": id:%" PRIu64
": lost:%" PRIu64
"\n",
549 event
->lost
.id
, event
->lost
.lost
);
553 int machine__process_lost_samples_event(struct machine
*machine __maybe_unused
,
554 union perf_event
*event
, struct perf_sample
*sample
)
556 dump_printf(": id:%" PRIu64
": lost samples :%" PRIu64
"\n",
557 sample
->id
, event
->lost_samples
.lost
);
561 static struct dso
*machine__findnew_module_dso(struct machine
*machine
,
563 const char *filename
)
567 pthread_rwlock_wrlock(&machine
->dsos
.lock
);
569 dso
= __dsos__find(&machine
->dsos
, m
->name
, true);
571 dso
= __dsos__addnew(&machine
->dsos
, m
->name
);
575 dso__set_module_info(dso
, m
, machine
);
576 dso__set_long_name(dso
, strdup(filename
), true);
581 pthread_rwlock_unlock(&machine
->dsos
.lock
);
585 int machine__process_aux_event(struct machine
*machine __maybe_unused
,
586 union perf_event
*event
)
589 perf_event__fprintf_aux(event
, stdout
);
593 int machine__process_itrace_start_event(struct machine
*machine __maybe_unused
,
594 union perf_event
*event
)
597 perf_event__fprintf_itrace_start(event
, stdout
);
601 int machine__process_switch_event(struct machine
*machine __maybe_unused
,
602 union perf_event
*event
)
605 perf_event__fprintf_switch(event
, stdout
);
609 static void dso__adjust_kmod_long_name(struct dso
*dso
, const char *filename
)
611 const char *dup_filename
;
613 if (!filename
|| !dso
|| !dso
->long_name
)
615 if (dso
->long_name
[0] != '[')
617 if (!strchr(filename
, '/'))
620 dup_filename
= strdup(filename
);
624 dso__set_long_name(dso
, dup_filename
, true);
627 struct map
*machine__findnew_module_map(struct machine
*machine
, u64 start
,
628 const char *filename
)
630 struct map
*map
= NULL
;
631 struct dso
*dso
= NULL
;
634 if (kmod_path__parse_name(&m
, filename
))
637 map
= map_groups__find_by_name(&machine
->kmaps
, MAP__FUNCTION
,
641 * If the map's dso is an offline module, give dso__load()
642 * a chance to find the file path of that module by fixing
645 dso__adjust_kmod_long_name(map
->dso
, filename
);
649 dso
= machine__findnew_module_dso(machine
, &m
, filename
);
653 map
= map__new2(start
, dso
, MAP__FUNCTION
);
657 map_groups__insert(&machine
->kmaps
, map
);
659 /* Put the map here because map_groups__insert alread got it */
662 /* put the dso here, corresponding to machine__findnew_module_dso */
668 size_t machines__fprintf_dsos(struct machines
*machines
, FILE *fp
)
671 size_t ret
= __dsos__fprintf(&machines
->host
.dsos
.head
, fp
);
673 for (nd
= rb_first(&machines
->guests
); nd
; nd
= rb_next(nd
)) {
674 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
675 ret
+= __dsos__fprintf(&pos
->dsos
.head
, fp
);
681 size_t machine__fprintf_dsos_buildid(struct machine
*m
, FILE *fp
,
682 bool (skip
)(struct dso
*dso
, int parm
), int parm
)
684 return __dsos__fprintf_buildid(&m
->dsos
.head
, fp
, skip
, parm
);
687 size_t machines__fprintf_dsos_buildid(struct machines
*machines
, FILE *fp
,
688 bool (skip
)(struct dso
*dso
, int parm
), int parm
)
691 size_t ret
= machine__fprintf_dsos_buildid(&machines
->host
, fp
, skip
, parm
);
693 for (nd
= rb_first(&machines
->guests
); nd
; nd
= rb_next(nd
)) {
694 struct machine
*pos
= rb_entry(nd
, struct machine
, rb_node
);
695 ret
+= machine__fprintf_dsos_buildid(pos
, fp
, skip
, parm
);
700 size_t machine__fprintf_vmlinux_path(struct machine
*machine
, FILE *fp
)
704 struct dso
*kdso
= machine__kernel_map(machine
)->dso
;
706 if (kdso
->has_build_id
) {
707 char filename
[PATH_MAX
];
708 if (dso__build_id_filename(kdso
, filename
, sizeof(filename
)))
709 printed
+= fprintf(fp
, "[0] %s\n", filename
);
712 for (i
= 0; i
< vmlinux_path__nr_entries
; ++i
)
713 printed
+= fprintf(fp
, "[%d] %s\n",
714 i
+ kdso
->has_build_id
, vmlinux_path
[i
]);
719 size_t machine__fprintf(struct machine
*machine
, FILE *fp
)
724 pthread_rwlock_rdlock(&machine
->threads_lock
);
726 ret
= fprintf(fp
, "Threads: %u\n", machine
->nr_threads
);
728 for (nd
= rb_first(&machine
->threads
); nd
; nd
= rb_next(nd
)) {
729 struct thread
*pos
= rb_entry(nd
, struct thread
, rb_node
);
731 ret
+= thread__fprintf(pos
, fp
);
734 pthread_rwlock_unlock(&machine
->threads_lock
);
739 static struct dso
*machine__get_kernel(struct machine
*machine
)
741 const char *vmlinux_name
= NULL
;
744 if (machine__is_host(machine
)) {
745 vmlinux_name
= symbol_conf
.vmlinux_name
;
747 vmlinux_name
= DSO__NAME_KALLSYMS
;
749 kernel
= machine__findnew_kernel(machine
, vmlinux_name
,
750 "[kernel]", DSO_TYPE_KERNEL
);
754 if (machine__is_default_guest(machine
))
755 vmlinux_name
= symbol_conf
.default_guest_vmlinux_name
;
757 vmlinux_name
= machine__mmap_name(machine
, bf
,
760 kernel
= machine__findnew_kernel(machine
, vmlinux_name
,
762 DSO_TYPE_GUEST_KERNEL
);
765 if (kernel
!= NULL
&& (!kernel
->has_build_id
))
766 dso__read_running_kernel_build_id(kernel
, machine
);
771 struct process_args
{
775 static void machine__get_kallsyms_filename(struct machine
*machine
, char *buf
,
778 if (machine__is_default_guest(machine
))
779 scnprintf(buf
, bufsz
, "%s", symbol_conf
.default_guest_kallsyms
);
781 scnprintf(buf
, bufsz
, "%s/proc/kallsyms", machine
->root_dir
);
784 const char *ref_reloc_sym_names
[] = {"_text", "_stext", NULL
};
786 /* Figure out the start address of kernel map from /proc/kallsyms.
787 * Returns the name of the start symbol in *symbol_name. Pass in NULL as
788 * symbol_name if it's not that important.
790 static int machine__get_running_kernel_start(struct machine
*machine
,
791 const char **symbol_name
, u64
*start
)
793 char filename
[PATH_MAX
];
798 machine__get_kallsyms_filename(machine
, filename
, PATH_MAX
);
800 if (symbol__restricted_filename(filename
, "/proc/kallsyms"))
803 for (i
= 0; (name
= ref_reloc_sym_names
[i
]) != NULL
; i
++) {
804 err
= kallsyms__get_function_start(filename
, name
, &addr
);
819 int __machine__create_kernel_maps(struct machine
*machine
, struct dso
*kernel
)
824 if (machine__get_running_kernel_start(machine
, NULL
, &start
))
827 /* In case of renewal the kernel map, destroy previous one */
828 machine__destroy_kernel_maps(machine
);
830 for (type
= 0; type
< MAP__NR_TYPES
; ++type
) {
834 machine
->vmlinux_maps
[type
] = map__new2(start
, kernel
, type
);
835 if (machine
->vmlinux_maps
[type
] == NULL
)
838 machine
->vmlinux_maps
[type
]->map_ip
=
839 machine
->vmlinux_maps
[type
]->unmap_ip
=
841 map
= __machine__kernel_map(machine
, type
);
842 kmap
= map__kmap(map
);
846 kmap
->kmaps
= &machine
->kmaps
;
847 map_groups__insert(&machine
->kmaps
, map
);
853 void machine__destroy_kernel_maps(struct machine
*machine
)
857 for (type
= 0; type
< MAP__NR_TYPES
; ++type
) {
859 struct map
*map
= __machine__kernel_map(machine
, type
);
864 kmap
= map__kmap(map
);
865 map_groups__remove(&machine
->kmaps
, map
);
866 if (kmap
&& kmap
->ref_reloc_sym
) {
868 * ref_reloc_sym is shared among all maps, so free just
871 if (type
== MAP__FUNCTION
) {
872 zfree((char **)&kmap
->ref_reloc_sym
->name
);
873 zfree(&kmap
->ref_reloc_sym
);
875 kmap
->ref_reloc_sym
= NULL
;
878 map__put(machine
->vmlinux_maps
[type
]);
879 machine
->vmlinux_maps
[type
] = NULL
;
883 int machines__create_guest_kernel_maps(struct machines
*machines
)
886 struct dirent
**namelist
= NULL
;
892 if (symbol_conf
.default_guest_vmlinux_name
||
893 symbol_conf
.default_guest_modules
||
894 symbol_conf
.default_guest_kallsyms
) {
895 machines__create_kernel_maps(machines
, DEFAULT_GUEST_KERNEL_ID
);
898 if (symbol_conf
.guestmount
) {
899 items
= scandir(symbol_conf
.guestmount
, &namelist
, NULL
, NULL
);
902 for (i
= 0; i
< items
; i
++) {
903 if (!isdigit(namelist
[i
]->d_name
[0])) {
904 /* Filter out . and .. */
907 pid
= (pid_t
)strtol(namelist
[i
]->d_name
, &endp
, 10);
908 if ((*endp
!= '\0') ||
909 (endp
== namelist
[i
]->d_name
) ||
911 pr_debug("invalid directory (%s). Skipping.\n",
912 namelist
[i
]->d_name
);
915 sprintf(path
, "%s/%s/proc/kallsyms",
916 symbol_conf
.guestmount
,
917 namelist
[i
]->d_name
);
918 ret
= access(path
, R_OK
);
920 pr_debug("Can't access file %s\n", path
);
923 machines__create_kernel_maps(machines
, pid
);
932 void machines__destroy_kernel_maps(struct machines
*machines
)
934 struct rb_node
*next
= rb_first(&machines
->guests
);
936 machine__destroy_kernel_maps(&machines
->host
);
939 struct machine
*pos
= rb_entry(next
, struct machine
, rb_node
);
941 next
= rb_next(&pos
->rb_node
);
942 rb_erase(&pos
->rb_node
, &machines
->guests
);
943 machine__delete(pos
);
947 int machines__create_kernel_maps(struct machines
*machines
, pid_t pid
)
949 struct machine
*machine
= machines__findnew(machines
, pid
);
954 return machine__create_kernel_maps(machine
);
957 int __machine__load_kallsyms(struct machine
*machine
, const char *filename
,
958 enum map_type type
, bool no_kcore
)
960 struct map
*map
= machine__kernel_map(machine
);
961 int ret
= __dso__load_kallsyms(map
->dso
, filename
, map
, no_kcore
);
964 dso__set_loaded(map
->dso
, type
);
966 * Since /proc/kallsyms will have multiple sessions for the
967 * kernel, with modules between them, fixup the end of all
970 __map_groups__fixup_end(&machine
->kmaps
, type
);
976 int machine__load_kallsyms(struct machine
*machine
, const char *filename
,
979 return __machine__load_kallsyms(machine
, filename
, type
, false);
982 int machine__load_vmlinux_path(struct machine
*machine
, enum map_type type
)
984 struct map
*map
= machine__kernel_map(machine
);
985 int ret
= dso__load_vmlinux_path(map
->dso
, map
);
988 dso__set_loaded(map
->dso
, type
);
993 static void map_groups__fixup_end(struct map_groups
*mg
)
996 for (i
= 0; i
< MAP__NR_TYPES
; ++i
)
997 __map_groups__fixup_end(mg
, i
);
1000 static char *get_kernel_version(const char *root_dir
)
1002 char version
[PATH_MAX
];
1005 const char *prefix
= "Linux version ";
1007 sprintf(version
, "%s/proc/version", root_dir
);
1008 file
= fopen(version
, "r");
1013 tmp
= fgets(version
, sizeof(version
), file
);
1016 name
= strstr(version
, prefix
);
1019 name
+= strlen(prefix
);
1020 tmp
= strchr(name
, ' ');
1024 return strdup(name
);
1027 static bool is_kmod_dso(struct dso
*dso
)
1029 return dso
->symtab_type
== DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE
||
1030 dso
->symtab_type
== DSO_BINARY_TYPE__GUEST_KMODULE
;
1033 static int map_groups__set_module_path(struct map_groups
*mg
, const char *path
,
1034 struct kmod_path
*m
)
1039 map
= map_groups__find_by_name(mg
, MAP__FUNCTION
, m
->name
);
1043 long_name
= strdup(path
);
1044 if (long_name
== NULL
)
1047 dso__set_long_name(map
->dso
, long_name
, true);
1048 dso__kernel_module_get_build_id(map
->dso
, "");
1051 * Full name could reveal us kmod compression, so
1052 * we need to update the symtab_type if needed.
1054 if (m
->comp
&& is_kmod_dso(map
->dso
))
1055 map
->dso
->symtab_type
++;
1060 static int map_groups__set_modules_path_dir(struct map_groups
*mg
,
1061 const char *dir_name
, int depth
)
1063 struct dirent
*dent
;
1064 DIR *dir
= opendir(dir_name
);
1068 pr_debug("%s: cannot open %s dir\n", __func__
, dir_name
);
1072 while ((dent
= readdir(dir
)) != NULL
) {
1073 char path
[PATH_MAX
];
1076 /*sshfs might return bad dent->d_type, so we have to stat*/
1077 snprintf(path
, sizeof(path
), "%s/%s", dir_name
, dent
->d_name
);
1078 if (stat(path
, &st
))
1081 if (S_ISDIR(st
.st_mode
)) {
1082 if (!strcmp(dent
->d_name
, ".") ||
1083 !strcmp(dent
->d_name
, ".."))
1086 /* Do not follow top-level source and build symlinks */
1088 if (!strcmp(dent
->d_name
, "source") ||
1089 !strcmp(dent
->d_name
, "build"))
1093 ret
= map_groups__set_modules_path_dir(mg
, path
,
1100 ret
= kmod_path__parse_name(&m
, dent
->d_name
);
1105 ret
= map_groups__set_module_path(mg
, path
, &m
);
1119 static int machine__set_modules_path(struct machine
*machine
)
1122 char modules_path
[PATH_MAX
];
1124 version
= get_kernel_version(machine
->root_dir
);
1128 snprintf(modules_path
, sizeof(modules_path
), "%s/lib/modules/%s",
1129 machine
->root_dir
, version
);
1132 return map_groups__set_modules_path_dir(&machine
->kmaps
, modules_path
, 0);
1134 int __weak
arch__fix_module_text_start(u64
*start __maybe_unused
,
1135 const char *name __maybe_unused
)
1140 static int machine__create_module(void *arg
, const char *name
, u64 start
)
1142 struct machine
*machine
= arg
;
1145 if (arch__fix_module_text_start(&start
, name
) < 0)
1148 map
= machine__findnew_module_map(machine
, start
, name
);
1152 dso__kernel_module_get_build_id(map
->dso
, machine
->root_dir
);
1157 static int machine__create_modules(struct machine
*machine
)
1159 const char *modules
;
1160 char path
[PATH_MAX
];
1162 if (machine__is_default_guest(machine
)) {
1163 modules
= symbol_conf
.default_guest_modules
;
1165 snprintf(path
, PATH_MAX
, "%s/proc/modules", machine
->root_dir
);
1169 if (symbol__restricted_filename(modules
, "/proc/modules"))
1172 if (modules__parse(modules
, machine
, machine__create_module
))
1175 if (!machine__set_modules_path(machine
))
1178 pr_debug("Problems setting modules path maps, continuing anyway...\n");
1183 int machine__create_kernel_maps(struct machine
*machine
)
1185 struct dso
*kernel
= machine__get_kernel(machine
);
1186 const char *name
= NULL
;
1193 ret
= __machine__create_kernel_maps(machine
, kernel
);
1198 if (symbol_conf
.use_modules
&& machine__create_modules(machine
) < 0) {
1199 if (machine__is_host(machine
))
1200 pr_debug("Problems creating module maps, "
1201 "continuing anyway...\n");
1203 pr_debug("Problems creating module maps for guest %d, "
1204 "continuing anyway...\n", machine
->pid
);
1208 * Now that we have all the maps created, just set the ->end of them:
1210 map_groups__fixup_end(&machine
->kmaps
);
1212 if (!machine__get_running_kernel_start(machine
, &name
, &addr
)) {
1214 maps__set_kallsyms_ref_reloc_sym(machine
->vmlinux_maps
, name
, addr
)) {
1215 machine__destroy_kernel_maps(machine
);
1223 static void machine__set_kernel_mmap_len(struct machine
*machine
,
1224 union perf_event
*event
)
1228 for (i
= 0; i
< MAP__NR_TYPES
; i
++) {
1229 machine
->vmlinux_maps
[i
]->start
= event
->mmap
.start
;
1230 machine
->vmlinux_maps
[i
]->end
= (event
->mmap
.start
+
1233 * Be a bit paranoid here, some perf.data file came with
1234 * a zero sized synthesized MMAP event for the kernel.
1236 if (machine
->vmlinux_maps
[i
]->end
== 0)
1237 machine
->vmlinux_maps
[i
]->end
= ~0ULL;
1241 static bool machine__uses_kcore(struct machine
*machine
)
1245 list_for_each_entry(dso
, &machine
->dsos
.head
, node
) {
1246 if (dso__is_kcore(dso
))
1253 static int machine__process_kernel_mmap_event(struct machine
*machine
,
1254 union perf_event
*event
)
1257 char kmmap_prefix
[PATH_MAX
];
1258 enum dso_kernel_type kernel_type
;
1259 bool is_kernel_mmap
;
1261 /* If we have maps from kcore then we do not need or want any others */
1262 if (machine__uses_kcore(machine
))
1265 machine__mmap_name(machine
, kmmap_prefix
, sizeof(kmmap_prefix
));
1266 if (machine__is_host(machine
))
1267 kernel_type
= DSO_TYPE_KERNEL
;
1269 kernel_type
= DSO_TYPE_GUEST_KERNEL
;
1271 is_kernel_mmap
= memcmp(event
->mmap
.filename
,
1273 strlen(kmmap_prefix
) - 1) == 0;
1274 if (event
->mmap
.filename
[0] == '/' ||
1275 (!is_kernel_mmap
&& event
->mmap
.filename
[0] == '[')) {
1276 map
= machine__findnew_module_map(machine
, event
->mmap
.start
,
1277 event
->mmap
.filename
);
1281 map
->end
= map
->start
+ event
->mmap
.len
;
1282 } else if (is_kernel_mmap
) {
1283 const char *symbol_name
= (event
->mmap
.filename
+
1284 strlen(kmmap_prefix
));
1286 * Should be there already, from the build-id table in
1289 struct dso
*kernel
= NULL
;
1292 pthread_rwlock_rdlock(&machine
->dsos
.lock
);
1294 list_for_each_entry(dso
, &machine
->dsos
.head
, node
) {
1297 * The cpumode passed to is_kernel_module is not the
1298 * cpumode of *this* event. If we insist on passing
1299 * correct cpumode to is_kernel_module, we should
1300 * record the cpumode when we adding this dso to the
1303 * However we don't really need passing correct
1304 * cpumode. We know the correct cpumode must be kernel
1305 * mode (if not, we should not link it onto kernel_dsos
1308 * Therefore, we pass PERF_RECORD_MISC_CPUMODE_UNKNOWN.
1309 * is_kernel_module() treats it as a kernel cpumode.
1313 is_kernel_module(dso
->long_name
,
1314 PERF_RECORD_MISC_CPUMODE_UNKNOWN
))
1322 pthread_rwlock_unlock(&machine
->dsos
.lock
);
1325 kernel
= machine__findnew_dso(machine
, kmmap_prefix
);
1329 kernel
->kernel
= kernel_type
;
1330 if (__machine__create_kernel_maps(machine
, kernel
) < 0) {
1335 if (strstr(kernel
->long_name
, "vmlinux"))
1336 dso__set_short_name(kernel
, "[kernel.vmlinux]", false);
1338 machine__set_kernel_mmap_len(machine
, event
);
1341 * Avoid using a zero address (kptr_restrict) for the ref reloc
1342 * symbol. Effectively having zero here means that at record
1343 * time /proc/sys/kernel/kptr_restrict was non zero.
1345 if (event
->mmap
.pgoff
!= 0) {
1346 maps__set_kallsyms_ref_reloc_sym(machine
->vmlinux_maps
,
1351 if (machine__is_default_guest(machine
)) {
1353 * preload dso of guest kernel and modules
1355 dso__load(kernel
, machine__kernel_map(machine
));
1363 int machine__process_mmap2_event(struct machine
*machine
,
1364 union perf_event
*event
,
1365 struct perf_sample
*sample
)
1367 struct thread
*thread
;
1373 perf_event__fprintf_mmap2(event
, stdout
);
1375 if (sample
->cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
||
1376 sample
->cpumode
== PERF_RECORD_MISC_KERNEL
) {
1377 ret
= machine__process_kernel_mmap_event(machine
, event
);
1383 thread
= machine__findnew_thread(machine
, event
->mmap2
.pid
,
1388 if (event
->header
.misc
& PERF_RECORD_MISC_MMAP_DATA
)
1389 type
= MAP__VARIABLE
;
1391 type
= MAP__FUNCTION
;
1393 map
= map__new(machine
, event
->mmap2
.start
,
1394 event
->mmap2
.len
, event
->mmap2
.pgoff
,
1395 event
->mmap2
.pid
, event
->mmap2
.maj
,
1396 event
->mmap2
.min
, event
->mmap2
.ino
,
1397 event
->mmap2
.ino_generation
,
1400 event
->mmap2
.filename
, type
, thread
);
1403 goto out_problem_map
;
1405 ret
= thread__insert_map(thread
, map
);
1407 goto out_problem_insert
;
1409 thread__put(thread
);
1416 thread__put(thread
);
1418 dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n");
1422 int machine__process_mmap_event(struct machine
*machine
, union perf_event
*event
,
1423 struct perf_sample
*sample
)
1425 struct thread
*thread
;
1431 perf_event__fprintf_mmap(event
, stdout
);
1433 if (sample
->cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
||
1434 sample
->cpumode
== PERF_RECORD_MISC_KERNEL
) {
1435 ret
= machine__process_kernel_mmap_event(machine
, event
);
1441 thread
= machine__findnew_thread(machine
, event
->mmap
.pid
,
1446 if (event
->header
.misc
& PERF_RECORD_MISC_MMAP_DATA
)
1447 type
= MAP__VARIABLE
;
1449 type
= MAP__FUNCTION
;
1451 map
= map__new(machine
, event
->mmap
.start
,
1452 event
->mmap
.len
, event
->mmap
.pgoff
,
1453 event
->mmap
.pid
, 0, 0, 0, 0, 0, 0,
1454 event
->mmap
.filename
,
1458 goto out_problem_map
;
1460 ret
= thread__insert_map(thread
, map
);
1462 goto out_problem_insert
;
1464 thread__put(thread
);
1471 thread__put(thread
);
1473 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
1477 static void __machine__remove_thread(struct machine
*machine
, struct thread
*th
, bool lock
)
1479 if (machine
->last_match
== th
)
1480 machine
->last_match
= NULL
;
1482 BUG_ON(refcount_read(&th
->refcnt
) == 0);
1484 pthread_rwlock_wrlock(&machine
->threads_lock
);
1485 rb_erase_init(&th
->rb_node
, &machine
->threads
);
1486 RB_CLEAR_NODE(&th
->rb_node
);
1487 --machine
->nr_threads
;
1489 * Move it first to the dead_threads list, then drop the reference,
1490 * if this is the last reference, then the thread__delete destructor
1491 * will be called and we will remove it from the dead_threads list.
1493 list_add_tail(&th
->node
, &machine
->dead_threads
);
1495 pthread_rwlock_unlock(&machine
->threads_lock
);
1499 void machine__remove_thread(struct machine
*machine
, struct thread
*th
)
1501 return __machine__remove_thread(machine
, th
, true);
1504 int machine__process_fork_event(struct machine
*machine
, union perf_event
*event
,
1505 struct perf_sample
*sample
)
1507 struct thread
*thread
= machine__find_thread(machine
,
1510 struct thread
*parent
= machine__findnew_thread(machine
,
1516 perf_event__fprintf_task(event
, stdout
);
1519 * There may be an existing thread that is not actually the parent,
1520 * either because we are processing events out of order, or because the
1521 * (fork) event that would have removed the thread was lost. Assume the
1522 * latter case and continue on as best we can.
1524 if (parent
->pid_
!= (pid_t
)event
->fork
.ppid
) {
1525 dump_printf("removing erroneous parent thread %d/%d\n",
1526 parent
->pid_
, parent
->tid
);
1527 machine__remove_thread(machine
, parent
);
1528 thread__put(parent
);
1529 parent
= machine__findnew_thread(machine
, event
->fork
.ppid
,
1533 /* if a thread currently exists for the thread id remove it */
1534 if (thread
!= NULL
) {
1535 machine__remove_thread(machine
, thread
);
1536 thread__put(thread
);
1539 thread
= machine__findnew_thread(machine
, event
->fork
.pid
,
1542 if (thread
== NULL
|| parent
== NULL
||
1543 thread__fork(thread
, parent
, sample
->time
) < 0) {
1544 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
1547 thread__put(thread
);
1548 thread__put(parent
);
1553 int machine__process_exit_event(struct machine
*machine
, union perf_event
*event
,
1554 struct perf_sample
*sample __maybe_unused
)
1556 struct thread
*thread
= machine__find_thread(machine
,
1561 perf_event__fprintf_task(event
, stdout
);
1563 if (thread
!= NULL
) {
1564 thread__exited(thread
);
1565 thread__put(thread
);
1571 int machine__process_event(struct machine
*machine
, union perf_event
*event
,
1572 struct perf_sample
*sample
)
1576 switch (event
->header
.type
) {
1577 case PERF_RECORD_COMM
:
1578 ret
= machine__process_comm_event(machine
, event
, sample
); break;
1579 case PERF_RECORD_MMAP
:
1580 ret
= machine__process_mmap_event(machine
, event
, sample
); break;
1581 case PERF_RECORD_NAMESPACES
:
1582 ret
= machine__process_namespaces_event(machine
, event
, sample
); break;
1583 case PERF_RECORD_MMAP2
:
1584 ret
= machine__process_mmap2_event(machine
, event
, sample
); break;
1585 case PERF_RECORD_FORK
:
1586 ret
= machine__process_fork_event(machine
, event
, sample
); break;
1587 case PERF_RECORD_EXIT
:
1588 ret
= machine__process_exit_event(machine
, event
, sample
); break;
1589 case PERF_RECORD_LOST
:
1590 ret
= machine__process_lost_event(machine
, event
, sample
); break;
1591 case PERF_RECORD_AUX
:
1592 ret
= machine__process_aux_event(machine
, event
); break;
1593 case PERF_RECORD_ITRACE_START
:
1594 ret
= machine__process_itrace_start_event(machine
, event
); break;
1595 case PERF_RECORD_LOST_SAMPLES
:
1596 ret
= machine__process_lost_samples_event(machine
, event
, sample
); break;
1597 case PERF_RECORD_SWITCH
:
1598 case PERF_RECORD_SWITCH_CPU_WIDE
:
1599 ret
= machine__process_switch_event(machine
, event
); break;
1608 static bool symbol__match_regex(struct symbol
*sym
, regex_t
*regex
)
1610 if (!regexec(regex
, sym
->name
, 0, NULL
, 0))
1615 static void ip__resolve_ams(struct thread
*thread
,
1616 struct addr_map_symbol
*ams
,
1619 struct addr_location al
;
1621 memset(&al
, 0, sizeof(al
));
1623 * We cannot use the header.misc hint to determine whether a
1624 * branch stack address is user, kernel, guest, hypervisor.
1625 * Branches may straddle the kernel/user/hypervisor boundaries.
1626 * Thus, we have to try consecutively until we find a match
1627 * or else, the symbol is unknown
1629 thread__find_cpumode_addr_location(thread
, MAP__FUNCTION
, ip
, &al
);
1632 ams
->al_addr
= al
.addr
;
1637 static void ip__resolve_data(struct thread
*thread
,
1638 u8 m
, struct addr_map_symbol
*ams
, u64 addr
)
1640 struct addr_location al
;
1642 memset(&al
, 0, sizeof(al
));
1644 thread__find_addr_location(thread
, m
, MAP__VARIABLE
, addr
, &al
);
1645 if (al
.map
== NULL
) {
1647 * some shared data regions have execute bit set which puts
1648 * their mapping in the MAP__FUNCTION type array.
1649 * Check there as a fallback option before dropping the sample.
1651 thread__find_addr_location(thread
, m
, MAP__FUNCTION
, addr
, &al
);
1655 ams
->al_addr
= al
.addr
;
1660 struct mem_info
*sample__resolve_mem(struct perf_sample
*sample
,
1661 struct addr_location
*al
)
1663 struct mem_info
*mi
= zalloc(sizeof(*mi
));
1668 ip__resolve_ams(al
->thread
, &mi
->iaddr
, sample
->ip
);
1669 ip__resolve_data(al
->thread
, al
->cpumode
, &mi
->daddr
, sample
->addr
);
1670 mi
->data_src
.val
= sample
->data_src
;
1675 static int add_callchain_ip(struct thread
*thread
,
1676 struct callchain_cursor
*cursor
,
1677 struct symbol
**parent
,
1678 struct addr_location
*root_al
,
1682 struct branch_flags
*flags
,
1686 struct addr_location al
;
1691 thread__find_cpumode_addr_location(thread
, MAP__FUNCTION
,
1694 if (ip
>= PERF_CONTEXT_MAX
) {
1696 case PERF_CONTEXT_HV
:
1697 *cpumode
= PERF_RECORD_MISC_HYPERVISOR
;
1699 case PERF_CONTEXT_KERNEL
:
1700 *cpumode
= PERF_RECORD_MISC_KERNEL
;
1702 case PERF_CONTEXT_USER
:
1703 *cpumode
= PERF_RECORD_MISC_USER
;
1706 pr_debug("invalid callchain context: "
1707 "%"PRId64
"\n", (s64
) ip
);
1709 * It seems the callchain is corrupted.
1712 callchain_cursor_reset(cursor
);
1717 thread__find_addr_location(thread
, *cpumode
, MAP__FUNCTION
,
1721 if (al
.sym
!= NULL
) {
1722 if (perf_hpp_list
.parent
&& !*parent
&&
1723 symbol__match_regex(al
.sym
, &parent_regex
))
1725 else if (have_ignore_callees
&& root_al
&&
1726 symbol__match_regex(al
.sym
, &ignore_callees_regex
)) {
1727 /* Treat this symbol as the root,
1728 forgetting its callees. */
1730 callchain_cursor_reset(cursor
);
1734 if (symbol_conf
.hide_unresolved
&& al
.sym
== NULL
)
1736 return callchain_cursor_append(cursor
, al
.addr
, al
.map
, al
.sym
,
1737 branch
, flags
, nr_loop_iter
, samples
);
1740 struct branch_info
*sample__resolve_bstack(struct perf_sample
*sample
,
1741 struct addr_location
*al
)
1744 const struct branch_stack
*bs
= sample
->branch_stack
;
1745 struct branch_info
*bi
= calloc(bs
->nr
, sizeof(struct branch_info
));
1750 for (i
= 0; i
< bs
->nr
; i
++) {
1751 ip__resolve_ams(al
->thread
, &bi
[i
].to
, bs
->entries
[i
].to
);
1752 ip__resolve_ams(al
->thread
, &bi
[i
].from
, bs
->entries
[i
].from
);
1753 bi
[i
].flags
= bs
->entries
[i
].flags
;
1760 #define NO_ENTRY 0xff
1762 #define PERF_MAX_BRANCH_DEPTH 127
1765 static int remove_loops(struct branch_entry
*l
, int nr
)
1768 unsigned char chash
[CHASHSZ
];
1770 memset(chash
, NO_ENTRY
, sizeof(chash
));
1772 BUG_ON(PERF_MAX_BRANCH_DEPTH
> 255);
1774 for (i
= 0; i
< nr
; i
++) {
1775 int h
= hash_64(l
[i
].from
, CHASHBITS
) % CHASHSZ
;
1777 /* no collision handling for now */
1778 if (chash
[h
] == NO_ENTRY
) {
1780 } else if (l
[chash
[h
]].from
== l
[i
].from
) {
1781 bool is_loop
= true;
1782 /* check if it is a real loop */
1784 for (j
= chash
[h
]; j
< i
&& i
+ off
< nr
; j
++, off
++)
1785 if (l
[j
].from
!= l
[i
+ off
].from
) {
1790 memmove(l
+ i
, l
+ i
+ off
,
1791 (nr
- (i
+ off
)) * sizeof(*l
));
1800 * Recolve LBR callstack chain sample
1802 * 1 on success get LBR callchain information
1803 * 0 no available LBR callchain information, should try fp
1804 * negative error code on other errors.
1806 static int resolve_lbr_callchain_sample(struct thread
*thread
,
1807 struct callchain_cursor
*cursor
,
1808 struct perf_sample
*sample
,
1809 struct symbol
**parent
,
1810 struct addr_location
*root_al
,
1813 struct ip_callchain
*chain
= sample
->callchain
;
1814 int chain_nr
= min(max_stack
, (int)chain
->nr
), i
;
1815 u8 cpumode
= PERF_RECORD_MISC_USER
;
1818 for (i
= 0; i
< chain_nr
; i
++) {
1819 if (chain
->ips
[i
] == PERF_CONTEXT_USER
)
1823 /* LBR only affects the user callchain */
1824 if (i
!= chain_nr
) {
1825 struct branch_stack
*lbr_stack
= sample
->branch_stack
;
1826 int lbr_nr
= lbr_stack
->nr
, j
, k
;
1828 struct branch_flags
*flags
;
1830 * LBR callstack can only get user call chain.
1831 * The mix_chain_nr is kernel call chain
1832 * number plus LBR user call chain number.
1833 * i is kernel call chain number,
1834 * 1 is PERF_CONTEXT_USER,
1835 * lbr_nr + 1 is the user call chain number.
1836 * For details, please refer to the comments
1837 * in callchain__printf
1839 int mix_chain_nr
= i
+ 1 + lbr_nr
+ 1;
1841 for (j
= 0; j
< mix_chain_nr
; j
++) {
1846 if (callchain_param
.order
== ORDER_CALLEE
) {
1849 else if (j
> i
+ 1) {
1851 ip
= lbr_stack
->entries
[k
].from
;
1853 flags
= &lbr_stack
->entries
[k
].flags
;
1855 ip
= lbr_stack
->entries
[0].to
;
1857 flags
= &lbr_stack
->entries
[0].flags
;
1862 ip
= lbr_stack
->entries
[k
].from
;
1864 flags
= &lbr_stack
->entries
[k
].flags
;
1866 else if (j
> lbr_nr
)
1867 ip
= chain
->ips
[i
+ 1 - (j
- lbr_nr
)];
1869 ip
= lbr_stack
->entries
[0].to
;
1871 flags
= &lbr_stack
->entries
[0].flags
;
1875 err
= add_callchain_ip(thread
, cursor
, parent
,
1876 root_al
, &cpumode
, ip
,
1877 branch
, flags
, 0, 0);
1879 return (err
< 0) ? err
: 0;
1887 static int thread__resolve_callchain_sample(struct thread
*thread
,
1888 struct callchain_cursor
*cursor
,
1889 struct perf_evsel
*evsel
,
1890 struct perf_sample
*sample
,
1891 struct symbol
**parent
,
1892 struct addr_location
*root_al
,
1895 struct branch_stack
*branch
= sample
->branch_stack
;
1896 struct ip_callchain
*chain
= sample
->callchain
;
1897 int chain_nr
= chain
->nr
;
1898 u8 cpumode
= PERF_RECORD_MISC_USER
;
1899 int i
, j
, err
, nr_entries
;
1904 if (perf_evsel__has_branch_callstack(evsel
)) {
1905 err
= resolve_lbr_callchain_sample(thread
, cursor
, sample
, parent
,
1906 root_al
, max_stack
);
1908 return (err
< 0) ? err
: 0;
1912 * Based on DWARF debug information, some architectures skip
1913 * a callchain entry saved by the kernel.
1915 skip_idx
= arch_skip_callchain_idx(thread
, chain
);
1918 * Add branches to call stack for easier browsing. This gives
1919 * more context for a sample than just the callers.
1921 * This uses individual histograms of paths compared to the
1922 * aggregated histograms the normal LBR mode uses.
1924 * Limitations for now:
1925 * - No extra filters
1926 * - No annotations (should annotate somehow)
1929 if (branch
&& callchain_param
.branch_callstack
) {
1930 int nr
= min(max_stack
, (int)branch
->nr
);
1931 struct branch_entry be
[nr
];
1933 if (branch
->nr
> PERF_MAX_BRANCH_DEPTH
) {
1934 pr_warning("corrupted branch chain. skipping...\n");
1938 for (i
= 0; i
< nr
; i
++) {
1939 if (callchain_param
.order
== ORDER_CALLEE
) {
1940 be
[i
] = branch
->entries
[i
];
1942 * Check for overlap into the callchain.
1943 * The return address is one off compared to
1944 * the branch entry. To adjust for this
1945 * assume the calling instruction is not longer
1948 if (i
== skip_idx
||
1949 chain
->ips
[first_call
] >= PERF_CONTEXT_MAX
)
1951 else if (be
[i
].from
< chain
->ips
[first_call
] &&
1952 be
[i
].from
>= chain
->ips
[first_call
] - 8)
1955 be
[i
] = branch
->entries
[branch
->nr
- i
- 1];
1959 nr
= remove_loops(be
, nr
);
1962 * Get the number of iterations.
1963 * It's only approximation, but good enough in practice.
1965 if (nr_loop_iter
> nr
)
1966 nr_loop_iter
= nr_loop_iter
- nr
+ 1;
1970 for (i
= 0; i
< nr
; i
++) {
1972 err
= add_callchain_ip(thread
, cursor
, parent
,
1978 err
= add_callchain_ip(thread
, cursor
, parent
,
1985 err
= add_callchain_ip(thread
, cursor
, parent
, root_al
,
1998 for (i
= first_call
, nr_entries
= 0;
1999 i
< chain_nr
&& nr_entries
< max_stack
; i
++) {
2002 if (callchain_param
.order
== ORDER_CALLEE
)
2005 j
= chain
->nr
- i
- 1;
2007 #ifdef HAVE_SKIP_CALLCHAIN_IDX
2013 if (ip
< PERF_CONTEXT_MAX
)
2016 err
= add_callchain_ip(thread
, cursor
, parent
,
2017 root_al
, &cpumode
, ip
,
2021 return (err
< 0) ? err
: 0;
2027 static int unwind_entry(struct unwind_entry
*entry
, void *arg
)
2029 struct callchain_cursor
*cursor
= arg
;
2031 if (symbol_conf
.hide_unresolved
&& entry
->sym
== NULL
)
2033 return callchain_cursor_append(cursor
, entry
->ip
,
2034 entry
->map
, entry
->sym
,
2038 static int thread__resolve_callchain_unwind(struct thread
*thread
,
2039 struct callchain_cursor
*cursor
,
2040 struct perf_evsel
*evsel
,
2041 struct perf_sample
*sample
,
2044 /* Can we do dwarf post unwind? */
2045 if (!((evsel
->attr
.sample_type
& PERF_SAMPLE_REGS_USER
) &&
2046 (evsel
->attr
.sample_type
& PERF_SAMPLE_STACK_USER
)))
2049 /* Bail out if nothing was captured. */
2050 if ((!sample
->user_regs
.regs
) ||
2051 (!sample
->user_stack
.size
))
2054 return unwind__get_entries(unwind_entry
, cursor
,
2055 thread
, sample
, max_stack
);
2058 int thread__resolve_callchain(struct thread
*thread
,
2059 struct callchain_cursor
*cursor
,
2060 struct perf_evsel
*evsel
,
2061 struct perf_sample
*sample
,
2062 struct symbol
**parent
,
2063 struct addr_location
*root_al
,
2068 callchain_cursor_reset(&callchain_cursor
);
2070 if (callchain_param
.order
== ORDER_CALLEE
) {
2071 ret
= thread__resolve_callchain_sample(thread
, cursor
,
2077 ret
= thread__resolve_callchain_unwind(thread
, cursor
,
2081 ret
= thread__resolve_callchain_unwind(thread
, cursor
,
2086 ret
= thread__resolve_callchain_sample(thread
, cursor
,
2095 int machine__for_each_thread(struct machine
*machine
,
2096 int (*fn
)(struct thread
*thread
, void *p
),
2100 struct thread
*thread
;
2103 for (nd
= rb_first(&machine
->threads
); nd
; nd
= rb_next(nd
)) {
2104 thread
= rb_entry(nd
, struct thread
, rb_node
);
2105 rc
= fn(thread
, priv
);
2110 list_for_each_entry(thread
, &machine
->dead_threads
, node
) {
2111 rc
= fn(thread
, priv
);
2118 int machines__for_each_thread(struct machines
*machines
,
2119 int (*fn
)(struct thread
*thread
, void *p
),
2125 rc
= machine__for_each_thread(&machines
->host
, fn
, priv
);
2129 for (nd
= rb_first(&machines
->guests
); nd
; nd
= rb_next(nd
)) {
2130 struct machine
*machine
= rb_entry(nd
, struct machine
, rb_node
);
2132 rc
= machine__for_each_thread(machine
, fn
, priv
);
2139 int __machine__synthesize_threads(struct machine
*machine
, struct perf_tool
*tool
,
2140 struct target
*target
, struct thread_map
*threads
,
2141 perf_event__handler_t process
, bool data_mmap
,
2142 unsigned int proc_map_timeout
)
2144 if (target__has_task(target
))
2145 return perf_event__synthesize_thread_map(tool
, threads
, process
, machine
, data_mmap
, proc_map_timeout
);
2146 else if (target__has_cpu(target
))
2147 return perf_event__synthesize_threads(tool
, process
, machine
, data_mmap
, proc_map_timeout
);
2148 /* command specified */
2152 pid_t
machine__get_current_tid(struct machine
*machine
, int cpu
)
2154 if (cpu
< 0 || cpu
>= MAX_NR_CPUS
|| !machine
->current_tid
)
2157 return machine
->current_tid
[cpu
];
2160 int machine__set_current_tid(struct machine
*machine
, int cpu
, pid_t pid
,
2163 struct thread
*thread
;
2168 if (!machine
->current_tid
) {
2171 machine
->current_tid
= calloc(MAX_NR_CPUS
, sizeof(pid_t
));
2172 if (!machine
->current_tid
)
2174 for (i
= 0; i
< MAX_NR_CPUS
; i
++)
2175 machine
->current_tid
[i
] = -1;
2178 if (cpu
>= MAX_NR_CPUS
) {
2179 pr_err("Requested CPU %d too large. ", cpu
);
2180 pr_err("Consider raising MAX_NR_CPUS\n");
2184 machine
->current_tid
[cpu
] = tid
;
2186 thread
= machine__findnew_thread(machine
, pid
, tid
);
2191 thread__put(thread
);
2196 int machine__get_kernel_start(struct machine
*machine
)
2198 struct map
*map
= machine__kernel_map(machine
);
2202 * The only addresses above 2^63 are kernel addresses of a 64-bit
2203 * kernel. Note that addresses are unsigned so that on a 32-bit system
2204 * all addresses including kernel addresses are less than 2^32. In
2205 * that case (32-bit system), if the kernel mapping is unknown, all
2206 * addresses will be assumed to be in user space - see
2207 * machine__kernel_ip().
2209 machine
->kernel_start
= 1ULL << 63;
2211 err
= map__load(map
);
2213 machine
->kernel_start
= map
->start
;
2218 struct dso
*machine__findnew_dso(struct machine
*machine
, const char *filename
)
2220 return dsos__findnew(&machine
->dsos
, filename
);
2223 char *machine__resolve_kernel_addr(void *vmachine
, unsigned long long *addrp
, char **modp
)
2225 struct machine
*machine
= vmachine
;
2227 struct symbol
*sym
= map_groups__find_symbol(&machine
->kmaps
, MAP__FUNCTION
, *addrp
, &map
);
2232 *modp
= __map__is_kmodule(map
) ? (char *)map
->dso
->short_name
: NULL
;
2233 *addrp
= map
->unmap_ip(map
, sym
->start
);