1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
17 #include "event-parse.h"
18 #include "perf_regs.h"
21 static int perf_session__open(struct perf_session
*self
, bool force
)
23 struct stat input_stat
;
25 if (!strcmp(self
->filename
, "-")) {
27 self
->fd
= STDIN_FILENO
;
29 if (perf_session__read_header(self
, self
->fd
) < 0)
30 pr_err("incompatible file format (rerun with -v to learn more)");
35 self
->fd
= open(self
->filename
, O_RDONLY
);
39 pr_err("failed to open %s: %s", self
->filename
, strerror(err
));
40 if (err
== ENOENT
&& !strcmp(self
->filename
, "perf.data"))
41 pr_err(" (try 'perf record' first)");
46 if (fstat(self
->fd
, &input_stat
) < 0)
49 if (!force
&& input_stat
.st_uid
&& (input_stat
.st_uid
!= geteuid())) {
50 pr_err("file %s not owned by current user or root\n",
55 if (!input_stat
.st_size
) {
56 pr_info("zero-sized file (%s), nothing to do!\n",
61 if (perf_session__read_header(self
, self
->fd
) < 0) {
62 pr_err("incompatible file format (rerun with -v to learn more)");
66 if (!perf_evlist__valid_sample_type(self
->evlist
)) {
67 pr_err("non matching sample_type");
71 if (!perf_evlist__valid_sample_id_all(self
->evlist
)) {
72 pr_err("non matching sample_id_all");
76 self
->size
= input_stat
.st_size
;
85 void perf_session__set_id_hdr_size(struct perf_session
*session
)
87 u16 id_hdr_size
= perf_evlist__id_hdr_size(session
->evlist
);
89 session
->host_machine
.id_hdr_size
= id_hdr_size
;
90 machines__set_id_hdr_size(&session
->machines
, id_hdr_size
);
93 int perf_session__create_kernel_maps(struct perf_session
*self
)
95 int ret
= machine__create_kernel_maps(&self
->host_machine
);
98 ret
= machines__create_guest_kernel_maps(&self
->machines
);
102 static void perf_session__destroy_kernel_maps(struct perf_session
*self
)
104 machine__destroy_kernel_maps(&self
->host_machine
);
105 machines__destroy_guest_kernel_maps(&self
->machines
);
108 struct perf_session
*perf_session__new(const char *filename
, int mode
,
109 bool force
, bool repipe
,
110 struct perf_tool
*tool
)
112 struct perf_session
*self
;
116 if (!filename
|| !strlen(filename
)) {
117 if (!fstat(STDIN_FILENO
, &st
) && S_ISFIFO(st
.st_mode
))
120 filename
= "perf.data";
123 len
= strlen(filename
);
124 self
= zalloc(sizeof(*self
) + len
);
129 memcpy(self
->filename
, filename
, len
);
131 * On 64bit we can mmap the data file in one go. No need for tiny mmap
132 * slices. On 32bit we use 32MB.
134 #if BITS_PER_LONG == 64
135 self
->mmap_window
= ULLONG_MAX
;
137 self
->mmap_window
= 32 * 1024 * 1024ULL;
139 self
->machines
= RB_ROOT
;
140 self
->repipe
= repipe
;
141 INIT_LIST_HEAD(&self
->ordered_samples
.samples
);
142 INIT_LIST_HEAD(&self
->ordered_samples
.sample_cache
);
143 INIT_LIST_HEAD(&self
->ordered_samples
.to_free
);
144 machine__init(&self
->host_machine
, "", HOST_KERNEL_ID
);
145 hists__init(&self
->hists
);
147 if (mode
== O_RDONLY
) {
148 if (perf_session__open(self
, force
) < 0)
150 perf_session__set_id_hdr_size(self
);
151 } else if (mode
== O_WRONLY
) {
153 * In O_RDONLY mode this will be performed when reading the
154 * kernel MMAP event, in perf_event__process_mmap().
156 if (perf_session__create_kernel_maps(self
) < 0)
160 if (tool
&& tool
->ordering_requires_timestamps
&&
161 tool
->ordered_samples
&& !perf_evlist__sample_id_all(self
->evlist
)) {
162 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
163 tool
->ordered_samples
= false;
169 perf_session__delete(self
);
173 static void machine__delete_dead_threads(struct machine
*machine
)
175 struct thread
*n
, *t
;
177 list_for_each_entry_safe(t
, n
, &machine
->dead_threads
, node
) {
183 static void perf_session__delete_dead_threads(struct perf_session
*session
)
185 machine__delete_dead_threads(&session
->host_machine
);
188 static void machine__delete_threads(struct machine
*self
)
190 struct rb_node
*nd
= rb_first(&self
->threads
);
193 struct thread
*t
= rb_entry(nd
, struct thread
, rb_node
);
195 rb_erase(&t
->rb_node
, &self
->threads
);
201 static void perf_session__delete_threads(struct perf_session
*session
)
203 machine__delete_threads(&session
->host_machine
);
206 void perf_session__delete(struct perf_session
*self
)
208 perf_session__destroy_kernel_maps(self
);
209 perf_session__delete_dead_threads(self
);
210 perf_session__delete_threads(self
);
211 machine__exit(&self
->host_machine
);
216 void machine__remove_thread(struct machine
*self
, struct thread
*th
)
218 self
->last_match
= NULL
;
219 rb_erase(&th
->rb_node
, &self
->threads
);
221 * We may have references to this thread, for instance in some hist_entry
222 * instances, so just move them to a separate list.
224 list_add_tail(&th
->node
, &self
->dead_threads
);
227 static bool symbol__match_parent_regex(struct symbol
*sym
)
229 if (sym
->name
&& !regexec(&parent_regex
, sym
->name
, 0, NULL
, 0))
235 static const u8 cpumodes
[] = {
236 PERF_RECORD_MISC_USER
,
237 PERF_RECORD_MISC_KERNEL
,
238 PERF_RECORD_MISC_GUEST_USER
,
239 PERF_RECORD_MISC_GUEST_KERNEL
241 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
243 static void ip__resolve_ams(struct machine
*self
, struct thread
*thread
,
244 struct addr_map_symbol
*ams
,
247 struct addr_location al
;
251 memset(&al
, 0, sizeof(al
));
253 for (i
= 0; i
< NCPUMODES
; i
++) {
256 * We cannot use the header.misc hint to determine whether a
257 * branch stack address is user, kernel, guest, hypervisor.
258 * Branches may straddle the kernel/user/hypervisor boundaries.
259 * Thus, we have to try consecutively until we find a match
260 * or else, the symbol is unknown
262 thread__find_addr_location(thread
, self
, m
, MAP__FUNCTION
,
269 ams
->al_addr
= al
.addr
;
274 struct branch_info
*machine__resolve_bstack(struct machine
*self
,
276 struct branch_stack
*bs
)
278 struct branch_info
*bi
;
281 bi
= calloc(bs
->nr
, sizeof(struct branch_info
));
285 for (i
= 0; i
< bs
->nr
; i
++) {
286 ip__resolve_ams(self
, thr
, &bi
[i
].to
, bs
->entries
[i
].to
);
287 ip__resolve_ams(self
, thr
, &bi
[i
].from
, bs
->entries
[i
].from
);
288 bi
[i
].flags
= bs
->entries
[i
].flags
;
293 static int machine__resolve_callchain_sample(struct machine
*machine
,
294 struct thread
*thread
,
295 struct ip_callchain
*chain
,
296 struct symbol
**parent
)
299 u8 cpumode
= PERF_RECORD_MISC_USER
;
303 callchain_cursor_reset(&callchain_cursor
);
305 if (chain
->nr
> PERF_MAX_STACK_DEPTH
) {
306 pr_warning("corrupted callchain. skipping...\n");
310 for (i
= 0; i
< chain
->nr
; i
++) {
312 struct addr_location al
;
314 if (callchain_param
.order
== ORDER_CALLEE
)
317 ip
= chain
->ips
[chain
->nr
- i
- 1];
319 if (ip
>= PERF_CONTEXT_MAX
) {
321 case PERF_CONTEXT_HV
:
322 cpumode
= PERF_RECORD_MISC_HYPERVISOR
;
324 case PERF_CONTEXT_KERNEL
:
325 cpumode
= PERF_RECORD_MISC_KERNEL
;
327 case PERF_CONTEXT_USER
:
328 cpumode
= PERF_RECORD_MISC_USER
;
331 pr_debug("invalid callchain context: "
332 "%"PRId64
"\n", (s64
) ip
);
334 * It seems the callchain is corrupted.
337 callchain_cursor_reset(&callchain_cursor
);
344 thread__find_addr_location(thread
, machine
, cpumode
,
345 MAP__FUNCTION
, ip
, &al
, NULL
);
346 if (al
.sym
!= NULL
) {
347 if (sort__has_parent
&& !*parent
&&
348 symbol__match_parent_regex(al
.sym
))
350 if (!symbol_conf
.use_callchain
)
354 err
= callchain_cursor_append(&callchain_cursor
,
363 static int unwind_entry(struct unwind_entry
*entry
, void *arg
)
365 struct callchain_cursor
*cursor
= arg
;
366 return callchain_cursor_append(cursor
, entry
->ip
,
367 entry
->map
, entry
->sym
);
370 int machine__resolve_callchain(struct machine
*machine
,
371 struct perf_evsel
*evsel
,
372 struct thread
*thread
,
373 struct perf_sample
*sample
,
374 struct symbol
**parent
)
379 callchain_cursor_reset(&callchain_cursor
);
381 ret
= machine__resolve_callchain_sample(machine
, thread
,
382 sample
->callchain
, parent
);
386 /* Can we do dwarf post unwind? */
387 if (!((evsel
->attr
.sample_type
& PERF_SAMPLE_REGS_USER
) &&
388 (evsel
->attr
.sample_type
& PERF_SAMPLE_STACK_USER
)))
391 return unwind__get_entries(unwind_entry
, &callchain_cursor
, machine
,
392 thread
, evsel
->attr
.sample_regs_user
,
397 static int process_event_synth_tracing_data_stub(union perf_event
*event __used
,
398 struct perf_session
*session __used
)
400 dump_printf(": unhandled!\n");
404 static int process_event_synth_attr_stub(union perf_event
*event __used
,
405 struct perf_evlist
**pevlist __used
)
407 dump_printf(": unhandled!\n");
411 static int process_event_sample_stub(struct perf_tool
*tool __used
,
412 union perf_event
*event __used
,
413 struct perf_sample
*sample __used
,
414 struct perf_evsel
*evsel __used
,
415 struct machine
*machine __used
)
417 dump_printf(": unhandled!\n");
421 static int process_event_stub(struct perf_tool
*tool __used
,
422 union perf_event
*event __used
,
423 struct perf_sample
*sample __used
,
424 struct machine
*machine __used
)
426 dump_printf(": unhandled!\n");
430 static int process_finished_round_stub(struct perf_tool
*tool __used
,
431 union perf_event
*event __used
,
432 struct perf_session
*perf_session __used
)
434 dump_printf(": unhandled!\n");
438 static int process_event_type_stub(struct perf_tool
*tool __used
,
439 union perf_event
*event __used
)
441 dump_printf(": unhandled!\n");
445 static int process_finished_round(struct perf_tool
*tool
,
446 union perf_event
*event
,
447 struct perf_session
*session
);
449 static void perf_tool__fill_defaults(struct perf_tool
*tool
)
451 if (tool
->sample
== NULL
)
452 tool
->sample
= process_event_sample_stub
;
453 if (tool
->mmap
== NULL
)
454 tool
->mmap
= process_event_stub
;
455 if (tool
->comm
== NULL
)
456 tool
->comm
= process_event_stub
;
457 if (tool
->fork
== NULL
)
458 tool
->fork
= process_event_stub
;
459 if (tool
->exit
== NULL
)
460 tool
->exit
= process_event_stub
;
461 if (tool
->lost
== NULL
)
462 tool
->lost
= perf_event__process_lost
;
463 if (tool
->read
== NULL
)
464 tool
->read
= process_event_sample_stub
;
465 if (tool
->throttle
== NULL
)
466 tool
->throttle
= process_event_stub
;
467 if (tool
->unthrottle
== NULL
)
468 tool
->unthrottle
= process_event_stub
;
469 if (tool
->attr
== NULL
)
470 tool
->attr
= process_event_synth_attr_stub
;
471 if (tool
->event_type
== NULL
)
472 tool
->event_type
= process_event_type_stub
;
473 if (tool
->tracing_data
== NULL
)
474 tool
->tracing_data
= process_event_synth_tracing_data_stub
;
475 if (tool
->build_id
== NULL
)
476 tool
->build_id
= process_finished_round_stub
;
477 if (tool
->finished_round
== NULL
) {
478 if (tool
->ordered_samples
)
479 tool
->finished_round
= process_finished_round
;
481 tool
->finished_round
= process_finished_round_stub
;
485 void mem_bswap_32(void *src
, int byte_size
)
488 while (byte_size
> 0) {
490 byte_size
-= sizeof(u32
);
495 void mem_bswap_64(void *src
, int byte_size
)
499 while (byte_size
> 0) {
501 byte_size
-= sizeof(u64
);
506 static void swap_sample_id_all(union perf_event
*event
, void *data
)
508 void *end
= (void *) event
+ event
->header
.size
;
509 int size
= end
- data
;
511 BUG_ON(size
% sizeof(u64
));
512 mem_bswap_64(data
, size
);
515 static void perf_event__all64_swap(union perf_event
*event
,
516 bool sample_id_all __used
)
518 struct perf_event_header
*hdr
= &event
->header
;
519 mem_bswap_64(hdr
+ 1, event
->header
.size
- sizeof(*hdr
));
522 static void perf_event__comm_swap(union perf_event
*event
, bool sample_id_all
)
524 event
->comm
.pid
= bswap_32(event
->comm
.pid
);
525 event
->comm
.tid
= bswap_32(event
->comm
.tid
);
528 void *data
= &event
->comm
.comm
;
530 data
+= ALIGN(strlen(data
) + 1, sizeof(u64
));
531 swap_sample_id_all(event
, data
);
535 static void perf_event__mmap_swap(union perf_event
*event
,
538 event
->mmap
.pid
= bswap_32(event
->mmap
.pid
);
539 event
->mmap
.tid
= bswap_32(event
->mmap
.tid
);
540 event
->mmap
.start
= bswap_64(event
->mmap
.start
);
541 event
->mmap
.len
= bswap_64(event
->mmap
.len
);
542 event
->mmap
.pgoff
= bswap_64(event
->mmap
.pgoff
);
545 void *data
= &event
->mmap
.filename
;
547 data
+= ALIGN(strlen(data
) + 1, sizeof(u64
));
548 swap_sample_id_all(event
, data
);
552 static void perf_event__task_swap(union perf_event
*event
, bool sample_id_all
)
554 event
->fork
.pid
= bswap_32(event
->fork
.pid
);
555 event
->fork
.tid
= bswap_32(event
->fork
.tid
);
556 event
->fork
.ppid
= bswap_32(event
->fork
.ppid
);
557 event
->fork
.ptid
= bswap_32(event
->fork
.ptid
);
558 event
->fork
.time
= bswap_64(event
->fork
.time
);
561 swap_sample_id_all(event
, &event
->fork
+ 1);
564 static void perf_event__read_swap(union perf_event
*event
, bool sample_id_all
)
566 event
->read
.pid
= bswap_32(event
->read
.pid
);
567 event
->read
.tid
= bswap_32(event
->read
.tid
);
568 event
->read
.value
= bswap_64(event
->read
.value
);
569 event
->read
.time_enabled
= bswap_64(event
->read
.time_enabled
);
570 event
->read
.time_running
= bswap_64(event
->read
.time_running
);
571 event
->read
.id
= bswap_64(event
->read
.id
);
574 swap_sample_id_all(event
, &event
->read
+ 1);
577 static u8
revbyte(u8 b
)
579 int rev
= (b
>> 4) | ((b
& 0xf) << 4);
580 rev
= ((rev
& 0xcc) >> 2) | ((rev
& 0x33) << 2);
581 rev
= ((rev
& 0xaa) >> 1) | ((rev
& 0x55) << 1);
586 * XXX this is hack in attempt to carry flags bitfield
587 * throught endian village. ABI says:
589 * Bit-fields are allocated from right to left (least to most significant)
590 * on little-endian implementations and from left to right (most to least
591 * significant) on big-endian implementations.
593 * The above seems to be byte specific, so we need to reverse each
594 * byte of the bitfield. 'Internet' also says this might be implementation
595 * specific and we probably need proper fix and carry perf_event_attr
596 * bitfield flags in separate data file FEAT_ section. Thought this seems
599 static void swap_bitfield(u8
*p
, unsigned len
)
603 for (i
= 0; i
< len
; i
++) {
609 /* exported for swapping attributes in file header */
610 void perf_event__attr_swap(struct perf_event_attr
*attr
)
612 attr
->type
= bswap_32(attr
->type
);
613 attr
->size
= bswap_32(attr
->size
);
614 attr
->config
= bswap_64(attr
->config
);
615 attr
->sample_period
= bswap_64(attr
->sample_period
);
616 attr
->sample_type
= bswap_64(attr
->sample_type
);
617 attr
->read_format
= bswap_64(attr
->read_format
);
618 attr
->wakeup_events
= bswap_32(attr
->wakeup_events
);
619 attr
->bp_type
= bswap_32(attr
->bp_type
);
620 attr
->bp_addr
= bswap_64(attr
->bp_addr
);
621 attr
->bp_len
= bswap_64(attr
->bp_len
);
623 swap_bitfield((u8
*) (&attr
->read_format
+ 1), sizeof(u64
));
626 static void perf_event__hdr_attr_swap(union perf_event
*event
,
627 bool sample_id_all __used
)
631 perf_event__attr_swap(&event
->attr
.attr
);
633 size
= event
->header
.size
;
634 size
-= (void *)&event
->attr
.id
- (void *)event
;
635 mem_bswap_64(event
->attr
.id
, size
);
638 static void perf_event__event_type_swap(union perf_event
*event
,
639 bool sample_id_all __used
)
641 event
->event_type
.event_type
.event_id
=
642 bswap_64(event
->event_type
.event_type
.event_id
);
645 static void perf_event__tracing_data_swap(union perf_event
*event
,
646 bool sample_id_all __used
)
648 event
->tracing_data
.size
= bswap_32(event
->tracing_data
.size
);
651 typedef void (*perf_event__swap_op
)(union perf_event
*event
,
654 static perf_event__swap_op perf_event__swap_ops
[] = {
655 [PERF_RECORD_MMAP
] = perf_event__mmap_swap
,
656 [PERF_RECORD_COMM
] = perf_event__comm_swap
,
657 [PERF_RECORD_FORK
] = perf_event__task_swap
,
658 [PERF_RECORD_EXIT
] = perf_event__task_swap
,
659 [PERF_RECORD_LOST
] = perf_event__all64_swap
,
660 [PERF_RECORD_READ
] = perf_event__read_swap
,
661 [PERF_RECORD_SAMPLE
] = perf_event__all64_swap
,
662 [PERF_RECORD_HEADER_ATTR
] = perf_event__hdr_attr_swap
,
663 [PERF_RECORD_HEADER_EVENT_TYPE
] = perf_event__event_type_swap
,
664 [PERF_RECORD_HEADER_TRACING_DATA
] = perf_event__tracing_data_swap
,
665 [PERF_RECORD_HEADER_BUILD_ID
] = NULL
,
666 [PERF_RECORD_HEADER_MAX
] = NULL
,
669 struct sample_queue
{
672 union perf_event
*event
;
673 struct list_head list
;
676 static void perf_session_free_sample_buffers(struct perf_session
*session
)
678 struct ordered_samples
*os
= &session
->ordered_samples
;
680 while (!list_empty(&os
->to_free
)) {
681 struct sample_queue
*sq
;
683 sq
= list_entry(os
->to_free
.next
, struct sample_queue
, list
);
689 static int perf_session_deliver_event(struct perf_session
*session
,
690 union perf_event
*event
,
691 struct perf_sample
*sample
,
692 struct perf_tool
*tool
,
695 static void flush_sample_queue(struct perf_session
*s
,
696 struct perf_tool
*tool
)
698 struct ordered_samples
*os
= &s
->ordered_samples
;
699 struct list_head
*head
= &os
->samples
;
700 struct sample_queue
*tmp
, *iter
;
701 struct perf_sample sample
;
702 u64 limit
= os
->next_flush
;
703 u64 last_ts
= os
->last_sample
? os
->last_sample
->timestamp
: 0ULL;
704 unsigned idx
= 0, progress_next
= os
->nr_samples
/ 16;
707 if (!tool
->ordered_samples
|| !limit
)
710 list_for_each_entry_safe(iter
, tmp
, head
, list
) {
711 if (iter
->timestamp
> limit
)
714 ret
= perf_evlist__parse_sample(s
->evlist
, iter
->event
, &sample
,
715 s
->header
.needs_swap
);
717 pr_err("Can't parse sample, err = %d\n", ret
);
719 perf_session_deliver_event(s
, iter
->event
, &sample
, tool
,
722 os
->last_flush
= iter
->timestamp
;
723 list_del(&iter
->list
);
724 list_add(&iter
->list
, &os
->sample_cache
);
725 if (++idx
>= progress_next
) {
726 progress_next
+= os
->nr_samples
/ 16;
727 ui_progress__update(idx
, os
->nr_samples
,
728 "Processing time ordered events...");
732 if (list_empty(head
)) {
733 os
->last_sample
= NULL
;
734 } else if (last_ts
<= limit
) {
736 list_entry(head
->prev
, struct sample_queue
, list
);
743 * When perf record finishes a pass on every buffers, it records this pseudo
745 * We record the max timestamp t found in the pass n.
746 * Assuming these timestamps are monotonic across cpus, we know that if
747 * a buffer still has events with timestamps below t, they will be all
748 * available and then read in the pass n + 1.
749 * Hence when we start to read the pass n + 2, we can safely flush every
750 * events with timestamps below t.
752 * ============ PASS n =================
755 * cnt1 timestamps | cnt2 timestamps
758 * - | 4 <--- max recorded
760 * ============ PASS n + 1 ==============
763 * cnt1 timestamps | cnt2 timestamps
766 * 5 | 7 <---- max recorded
768 * Flush every events below timestamp 4
770 * ============ PASS n + 2 ==============
773 * cnt1 timestamps | cnt2 timestamps
778 * Flush every events below timestamp 7
781 static int process_finished_round(struct perf_tool
*tool
,
782 union perf_event
*event __used
,
783 struct perf_session
*session
)
785 flush_sample_queue(session
, tool
);
786 session
->ordered_samples
.next_flush
= session
->ordered_samples
.max_timestamp
;
791 /* The queue is ordered by time */
792 static void __queue_event(struct sample_queue
*new, struct perf_session
*s
)
794 struct ordered_samples
*os
= &s
->ordered_samples
;
795 struct sample_queue
*sample
= os
->last_sample
;
796 u64 timestamp
= new->timestamp
;
800 os
->last_sample
= new;
803 list_add(&new->list
, &os
->samples
);
804 os
->max_timestamp
= timestamp
;
809 * last_sample might point to some random place in the list as it's
810 * the last queued event. We expect that the new event is close to
813 if (sample
->timestamp
<= timestamp
) {
814 while (sample
->timestamp
<= timestamp
) {
815 p
= sample
->list
.next
;
816 if (p
== &os
->samples
) {
817 list_add_tail(&new->list
, &os
->samples
);
818 os
->max_timestamp
= timestamp
;
821 sample
= list_entry(p
, struct sample_queue
, list
);
823 list_add_tail(&new->list
, &sample
->list
);
825 while (sample
->timestamp
> timestamp
) {
826 p
= sample
->list
.prev
;
827 if (p
== &os
->samples
) {
828 list_add(&new->list
, &os
->samples
);
831 sample
= list_entry(p
, struct sample_queue
, list
);
833 list_add(&new->list
, &sample
->list
);
837 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
839 static int perf_session_queue_event(struct perf_session
*s
, union perf_event
*event
,
840 struct perf_sample
*sample
, u64 file_offset
)
842 struct ordered_samples
*os
= &s
->ordered_samples
;
843 struct list_head
*sc
= &os
->sample_cache
;
844 u64 timestamp
= sample
->time
;
845 struct sample_queue
*new;
847 if (!timestamp
|| timestamp
== ~0ULL)
850 if (timestamp
< s
->ordered_samples
.last_flush
) {
851 printf("Warning: Timestamp below last timeslice flush\n");
855 if (!list_empty(sc
)) {
856 new = list_entry(sc
->next
, struct sample_queue
, list
);
857 list_del(&new->list
);
858 } else if (os
->sample_buffer
) {
859 new = os
->sample_buffer
+ os
->sample_buffer_idx
;
860 if (++os
->sample_buffer_idx
== MAX_SAMPLE_BUFFER
)
861 os
->sample_buffer
= NULL
;
863 os
->sample_buffer
= malloc(MAX_SAMPLE_BUFFER
* sizeof(*new));
864 if (!os
->sample_buffer
)
866 list_add(&os
->sample_buffer
->list
, &os
->to_free
);
867 os
->sample_buffer_idx
= 2;
868 new = os
->sample_buffer
+ 1;
871 new->timestamp
= timestamp
;
872 new->file_offset
= file_offset
;
875 __queue_event(new, s
);
880 static void callchain__printf(struct perf_sample
*sample
)
884 printf("... chain: nr:%" PRIu64
"\n", sample
->callchain
->nr
);
886 for (i
= 0; i
< sample
->callchain
->nr
; i
++)
887 printf("..... %2d: %016" PRIx64
"\n",
888 i
, sample
->callchain
->ips
[i
]);
891 static void branch_stack__printf(struct perf_sample
*sample
)
895 printf("... branch stack: nr:%" PRIu64
"\n", sample
->branch_stack
->nr
);
897 for (i
= 0; i
< sample
->branch_stack
->nr
; i
++)
898 printf("..... %2"PRIu64
": %016" PRIx64
" -> %016" PRIx64
"\n",
899 i
, sample
->branch_stack
->entries
[i
].from
,
900 sample
->branch_stack
->entries
[i
].to
);
903 static void regs_dump__printf(u64 mask
, u64
*regs
)
907 for_each_set_bit(rid
, (unsigned long *) &mask
, sizeof(mask
) * 8) {
910 printf(".... %-5s 0x%" PRIx64
"\n",
911 perf_reg_name(rid
), val
);
915 static void regs_user__printf(struct perf_sample
*sample
, u64 mask
)
917 struct regs_dump
*user_regs
= &sample
->user_regs
;
919 if (user_regs
->regs
) {
920 printf("... user regs: mask 0x%" PRIx64
"\n", mask
);
921 regs_dump__printf(mask
, user_regs
->regs
);
925 static void stack_user__printf(struct stack_dump
*dump
)
927 printf("... ustack: size %" PRIu64
", offset 0x%x\n",
928 dump
->size
, dump
->offset
);
931 static void perf_session__print_tstamp(struct perf_session
*session
,
932 union perf_event
*event
,
933 struct perf_sample
*sample
)
935 u64 sample_type
= perf_evlist__sample_type(session
->evlist
);
937 if (event
->header
.type
!= PERF_RECORD_SAMPLE
&&
938 !perf_evlist__sample_id_all(session
->evlist
)) {
939 fputs("-1 -1 ", stdout
);
943 if ((sample_type
& PERF_SAMPLE_CPU
))
944 printf("%u ", sample
->cpu
);
946 if (sample_type
& PERF_SAMPLE_TIME
)
947 printf("%" PRIu64
" ", sample
->time
);
950 static void dump_event(struct perf_session
*session
, union perf_event
*event
,
951 u64 file_offset
, struct perf_sample
*sample
)
956 printf("\n%#" PRIx64
" [%#x]: event: %d\n",
957 file_offset
, event
->header
.size
, event
->header
.type
);
962 perf_session__print_tstamp(session
, event
, sample
);
964 printf("%#" PRIx64
" [%#x]: PERF_RECORD_%s", file_offset
,
965 event
->header
.size
, perf_event__name(event
->header
.type
));
968 static void dump_sample(struct perf_evsel
*evsel
, union perf_event
*event
,
969 struct perf_sample
*sample
)
976 printf("(IP, %d): %d/%d: %#" PRIx64
" period: %" PRIu64
" addr: %#" PRIx64
"\n",
977 event
->header
.misc
, sample
->pid
, sample
->tid
, sample
->ip
,
978 sample
->period
, sample
->addr
);
980 sample_type
= evsel
->attr
.sample_type
;
982 if (sample_type
& PERF_SAMPLE_CALLCHAIN
)
983 callchain__printf(sample
);
985 if (sample_type
& PERF_SAMPLE_BRANCH_STACK
)
986 branch_stack__printf(sample
);
988 if (sample_type
& PERF_SAMPLE_REGS_USER
)
989 regs_user__printf(sample
, evsel
->attr
.sample_regs_user
);
991 if (sample_type
& PERF_SAMPLE_STACK_USER
)
992 stack_user__printf(&sample
->user_stack
);
995 static struct machine
*
996 perf_session__find_machine_for_cpumode(struct perf_session
*session
,
997 union perf_event
*event
)
999 const u8 cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
1002 ((cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
) ||
1003 (cpumode
== PERF_RECORD_MISC_GUEST_USER
))) {
1006 if (event
->header
.type
== PERF_RECORD_MMAP
)
1007 pid
= event
->mmap
.pid
;
1009 pid
= event
->ip
.pid
;
1011 return perf_session__findnew_machine(session
, pid
);
1014 return perf_session__find_host_machine(session
);
1017 static int perf_session_deliver_event(struct perf_session
*session
,
1018 union perf_event
*event
,
1019 struct perf_sample
*sample
,
1020 struct perf_tool
*tool
,
1023 struct perf_evsel
*evsel
;
1024 struct machine
*machine
;
1026 dump_event(session
, event
, file_offset
, sample
);
1028 evsel
= perf_evlist__id2evsel(session
->evlist
, sample
->id
);
1029 if (evsel
!= NULL
&& event
->header
.type
!= PERF_RECORD_SAMPLE
) {
1031 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
1032 * because the tools right now may apply filters, discarding
1033 * some of the samples. For consistency, in the future we
1034 * should have something like nr_filtered_samples and remove
1035 * the sample->period from total_sample_period, etc, KISS for
1038 * Also testing against NULL allows us to handle files without
1039 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
1040 * future probably it'll be a good idea to restrict event
1041 * processing via perf_session to files with both set.
1043 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
1046 machine
= perf_session__find_machine_for_cpumode(session
, event
);
1048 switch (event
->header
.type
) {
1049 case PERF_RECORD_SAMPLE
:
1050 dump_sample(evsel
, event
, sample
);
1051 if (evsel
== NULL
) {
1052 ++session
->hists
.stats
.nr_unknown_id
;
1055 if (machine
== NULL
) {
1056 ++session
->hists
.stats
.nr_unprocessable_samples
;
1059 return tool
->sample(tool
, event
, sample
, evsel
, machine
);
1060 case PERF_RECORD_MMAP
:
1061 return tool
->mmap(tool
, event
, sample
, machine
);
1062 case PERF_RECORD_COMM
:
1063 return tool
->comm(tool
, event
, sample
, machine
);
1064 case PERF_RECORD_FORK
:
1065 return tool
->fork(tool
, event
, sample
, machine
);
1066 case PERF_RECORD_EXIT
:
1067 return tool
->exit(tool
, event
, sample
, machine
);
1068 case PERF_RECORD_LOST
:
1069 if (tool
->lost
== perf_event__process_lost
)
1070 session
->hists
.stats
.total_lost
+= event
->lost
.lost
;
1071 return tool
->lost(tool
, event
, sample
, machine
);
1072 case PERF_RECORD_READ
:
1073 return tool
->read(tool
, event
, sample
, evsel
, machine
);
1074 case PERF_RECORD_THROTTLE
:
1075 return tool
->throttle(tool
, event
, sample
, machine
);
1076 case PERF_RECORD_UNTHROTTLE
:
1077 return tool
->unthrottle(tool
, event
, sample
, machine
);
1079 ++session
->hists
.stats
.nr_unknown_events
;
1084 static int perf_session__preprocess_sample(struct perf_session
*session
,
1085 union perf_event
*event
, struct perf_sample
*sample
)
1087 if (event
->header
.type
!= PERF_RECORD_SAMPLE
||
1088 !(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_CALLCHAIN
))
1091 if (!ip_callchain__valid(sample
->callchain
, event
)) {
1092 pr_debug("call-chain problem with event, skipping it.\n");
1093 ++session
->hists
.stats
.nr_invalid_chains
;
1094 session
->hists
.stats
.total_invalid_chains
+= sample
->period
;
1100 static int perf_session__process_user_event(struct perf_session
*session
, union perf_event
*event
,
1101 struct perf_tool
*tool
, u64 file_offset
)
1105 dump_event(session
, event
, file_offset
, NULL
);
1107 /* These events are processed right away */
1108 switch (event
->header
.type
) {
1109 case PERF_RECORD_HEADER_ATTR
:
1110 err
= tool
->attr(event
, &session
->evlist
);
1112 perf_session__set_id_hdr_size(session
);
1114 case PERF_RECORD_HEADER_EVENT_TYPE
:
1115 return tool
->event_type(tool
, event
);
1116 case PERF_RECORD_HEADER_TRACING_DATA
:
1117 /* setup for reading amidst mmap */
1118 lseek(session
->fd
, file_offset
, SEEK_SET
);
1119 return tool
->tracing_data(event
, session
);
1120 case PERF_RECORD_HEADER_BUILD_ID
:
1121 return tool
->build_id(tool
, event
, session
);
1122 case PERF_RECORD_FINISHED_ROUND
:
1123 return tool
->finished_round(tool
, event
, session
);
1129 static void event_swap(union perf_event
*event
, bool sample_id_all
)
1131 perf_event__swap_op swap
;
1133 swap
= perf_event__swap_ops
[event
->header
.type
];
1135 swap(event
, sample_id_all
);
1138 static int perf_session__process_event(struct perf_session
*session
,
1139 union perf_event
*event
,
1140 struct perf_tool
*tool
,
1143 struct perf_sample sample
;
1146 if (session
->header
.needs_swap
)
1147 event_swap(event
, perf_evlist__sample_id_all(session
->evlist
));
1149 if (event
->header
.type
>= PERF_RECORD_HEADER_MAX
)
1152 hists__inc_nr_events(&session
->hists
, event
->header
.type
);
1154 if (event
->header
.type
>= PERF_RECORD_USER_TYPE_START
)
1155 return perf_session__process_user_event(session
, event
, tool
, file_offset
);
1158 * For all kernel events we get the sample data
1160 ret
= perf_evlist__parse_sample(session
->evlist
, event
, &sample
,
1161 session
->header
.needs_swap
);
1165 /* Preprocess sample records - precheck callchains */
1166 if (perf_session__preprocess_sample(session
, event
, &sample
))
1169 if (tool
->ordered_samples
) {
1170 ret
= perf_session_queue_event(session
, event
, &sample
,
1176 return perf_session_deliver_event(session
, event
, &sample
, tool
,
1180 void perf_event_header__bswap(struct perf_event_header
*self
)
1182 self
->type
= bswap_32(self
->type
);
1183 self
->misc
= bswap_16(self
->misc
);
1184 self
->size
= bswap_16(self
->size
);
1187 struct thread
*perf_session__findnew(struct perf_session
*session
, pid_t pid
)
1189 return machine__findnew_thread(&session
->host_machine
, pid
);
1192 static struct thread
*perf_session__register_idle_thread(struct perf_session
*self
)
1194 struct thread
*thread
= perf_session__findnew(self
, 0);
1196 if (thread
== NULL
|| thread__set_comm(thread
, "swapper")) {
1197 pr_err("problem inserting idle task.\n");
1204 static void perf_session__warn_about_errors(const struct perf_session
*session
,
1205 const struct perf_tool
*tool
)
1207 if (tool
->lost
== perf_event__process_lost
&&
1208 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
] != 0) {
1209 ui__warning("Processed %d events and lost %d chunks!\n\n"
1210 "Check IO/CPU overload!\n\n",
1211 session
->hists
.stats
.nr_events
[0],
1212 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
]);
1215 if (session
->hists
.stats
.nr_unknown_events
!= 0) {
1216 ui__warning("Found %u unknown events!\n\n"
1217 "Is this an older tool processing a perf.data "
1218 "file generated by a more recent tool?\n\n"
1219 "If that is not the case, consider "
1220 "reporting to linux-kernel@vger.kernel.org.\n\n",
1221 session
->hists
.stats
.nr_unknown_events
);
1224 if (session
->hists
.stats
.nr_unknown_id
!= 0) {
1225 ui__warning("%u samples with id not present in the header\n",
1226 session
->hists
.stats
.nr_unknown_id
);
1229 if (session
->hists
.stats
.nr_invalid_chains
!= 0) {
1230 ui__warning("Found invalid callchains!\n\n"
1231 "%u out of %u events were discarded for this reason.\n\n"
1232 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1233 session
->hists
.stats
.nr_invalid_chains
,
1234 session
->hists
.stats
.nr_events
[PERF_RECORD_SAMPLE
]);
1237 if (session
->hists
.stats
.nr_unprocessable_samples
!= 0) {
1238 ui__warning("%u unprocessable samples recorded.\n"
1239 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1240 session
->hists
.stats
.nr_unprocessable_samples
);
1244 #define session_done() (*(volatile int *)(&session_done))
1245 volatile int session_done
;
1247 static int __perf_session__process_pipe_events(struct perf_session
*self
,
1248 struct perf_tool
*tool
)
1250 union perf_event
*event
;
1251 uint32_t size
, cur_size
= 0;
1258 perf_tool__fill_defaults(tool
);
1261 cur_size
= sizeof(union perf_event
);
1263 buf
= malloc(cur_size
);
1268 err
= readn(self
->fd
, event
, sizeof(struct perf_event_header
));
1273 pr_err("failed to read event header\n");
1277 if (self
->header
.needs_swap
)
1278 perf_event_header__bswap(&event
->header
);
1280 size
= event
->header
.size
;
1284 if (size
> cur_size
) {
1285 void *new = realloc(buf
, size
);
1287 pr_err("failed to allocate memory to read event\n");
1295 p
+= sizeof(struct perf_event_header
);
1297 if (size
- sizeof(struct perf_event_header
)) {
1298 err
= readn(self
->fd
, p
, size
- sizeof(struct perf_event_header
));
1301 pr_err("unexpected end of event stream\n");
1305 pr_err("failed to read event data\n");
1310 if ((skip
= perf_session__process_event(self
, event
, tool
, head
)) < 0) {
1311 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1312 head
, event
->header
.size
, event
->header
.type
);
1322 if (!session_done())
1328 perf_session__warn_about_errors(self
, tool
);
1329 perf_session_free_sample_buffers(self
);
1333 static union perf_event
*
1334 fetch_mmaped_event(struct perf_session
*session
,
1335 u64 head
, size_t mmap_size
, char *buf
)
1337 union perf_event
*event
;
1340 * Ensure we have enough space remaining to read
1341 * the size of the event in the headers.
1343 if (head
+ sizeof(event
->header
) > mmap_size
)
1346 event
= (union perf_event
*)(buf
+ head
);
1348 if (session
->header
.needs_swap
)
1349 perf_event_header__bswap(&event
->header
);
1351 if (head
+ event
->header
.size
> mmap_size
)
1357 int __perf_session__process_events(struct perf_session
*session
,
1358 u64 data_offset
, u64 data_size
,
1359 u64 file_size
, struct perf_tool
*tool
)
1361 u64 head
, page_offset
, file_offset
, file_pos
, progress_next
;
1362 int err
, mmap_prot
, mmap_flags
, map_idx
= 0;
1363 size_t page_size
, mmap_size
;
1364 char *buf
, *mmaps
[8];
1365 union perf_event
*event
;
1368 perf_tool__fill_defaults(tool
);
1370 page_size
= sysconf(_SC_PAGESIZE
);
1372 page_offset
= page_size
* (data_offset
/ page_size
);
1373 file_offset
= page_offset
;
1374 head
= data_offset
- page_offset
;
1376 if (data_offset
+ data_size
< file_size
)
1377 file_size
= data_offset
+ data_size
;
1379 progress_next
= file_size
/ 16;
1381 mmap_size
= session
->mmap_window
;
1382 if (mmap_size
> file_size
)
1383 mmap_size
= file_size
;
1385 memset(mmaps
, 0, sizeof(mmaps
));
1387 mmap_prot
= PROT_READ
;
1388 mmap_flags
= MAP_SHARED
;
1390 if (session
->header
.needs_swap
) {
1391 mmap_prot
|= PROT_WRITE
;
1392 mmap_flags
= MAP_PRIVATE
;
1395 buf
= mmap(NULL
, mmap_size
, mmap_prot
, mmap_flags
, session
->fd
,
1397 if (buf
== MAP_FAILED
) {
1398 pr_err("failed to mmap file\n");
1402 mmaps
[map_idx
] = buf
;
1403 map_idx
= (map_idx
+ 1) & (ARRAY_SIZE(mmaps
) - 1);
1404 file_pos
= file_offset
+ head
;
1407 event
= fetch_mmaped_event(session
, head
, mmap_size
, buf
);
1409 if (mmaps
[map_idx
]) {
1410 munmap(mmaps
[map_idx
], mmap_size
);
1411 mmaps
[map_idx
] = NULL
;
1414 page_offset
= page_size
* (head
/ page_size
);
1415 file_offset
+= page_offset
;
1416 head
-= page_offset
;
1420 size
= event
->header
.size
;
1423 perf_session__process_event(session
, event
, tool
, file_pos
) < 0) {
1424 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1425 file_offset
+ head
, event
->header
.size
,
1426 event
->header
.type
);
1434 if (file_pos
>= progress_next
) {
1435 progress_next
+= file_size
/ 16;
1436 ui_progress__update(file_pos
, file_size
,
1437 "Processing events...");
1440 if (file_pos
< file_size
)
1444 /* do the final flush for ordered samples */
1445 session
->ordered_samples
.next_flush
= ULLONG_MAX
;
1446 flush_sample_queue(session
, tool
);
1448 perf_session__warn_about_errors(session
, tool
);
1449 perf_session_free_sample_buffers(session
);
1453 int perf_session__process_events(struct perf_session
*self
,
1454 struct perf_tool
*tool
)
1458 if (perf_session__register_idle_thread(self
) == NULL
)
1462 err
= __perf_session__process_events(self
,
1463 self
->header
.data_offset
,
1464 self
->header
.data_size
,
1467 err
= __perf_session__process_pipe_events(self
, tool
);
1472 bool perf_session__has_traces(struct perf_session
*session
, const char *msg
)
1474 if (!(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_RAW
)) {
1475 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg
);
1482 int maps__set_kallsyms_ref_reloc_sym(struct map
**maps
,
1483 const char *symbol_name
, u64 addr
)
1487 struct ref_reloc_sym
*ref
;
1489 ref
= zalloc(sizeof(struct ref_reloc_sym
));
1493 ref
->name
= strdup(symbol_name
);
1494 if (ref
->name
== NULL
) {
1499 bracket
= strchr(ref
->name
, ']');
1505 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
1506 struct kmap
*kmap
= map__kmap(maps
[i
]);
1507 kmap
->ref_reloc_sym
= ref
;
1513 size_t perf_session__fprintf_dsos(struct perf_session
*self
, FILE *fp
)
1515 return __dsos__fprintf(&self
->host_machine
.kernel_dsos
, fp
) +
1516 __dsos__fprintf(&self
->host_machine
.user_dsos
, fp
) +
1517 machines__fprintf_dsos(&self
->machines
, fp
);
1520 size_t perf_session__fprintf_dsos_buildid(struct perf_session
*self
, FILE *fp
,
1523 size_t ret
= machine__fprintf_dsos_buildid(&self
->host_machine
, fp
, with_hits
);
1524 return ret
+ machines__fprintf_dsos_buildid(&self
->machines
, fp
, with_hits
);
1527 size_t perf_session__fprintf_nr_events(struct perf_session
*session
, FILE *fp
)
1529 struct perf_evsel
*pos
;
1530 size_t ret
= fprintf(fp
, "Aggregated stats:\n");
1532 ret
+= hists__fprintf_nr_events(&session
->hists
, fp
);
1534 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1535 ret
+= fprintf(fp
, "%s stats:\n", perf_evsel__name(pos
));
1536 ret
+= hists__fprintf_nr_events(&pos
->hists
, fp
);
1542 size_t perf_session__fprintf(struct perf_session
*session
, FILE *fp
)
1545 * FIXME: Here we have to actually print all the machines in this
1546 * session, not just the host...
1548 return machine__fprintf(&session
->host_machine
, fp
);
1551 void perf_session__remove_thread(struct perf_session
*session
,
1555 * FIXME: This one makes no sense, we need to remove the thread from
1556 * the machine it belongs to, perf_session can have many machines, so
1557 * doing it always on ->host_machine is wrong. Fix when auditing all
1558 * the 'perf kvm' code.
1560 machine__remove_thread(&session
->host_machine
, th
);
1563 struct perf_evsel
*perf_session__find_first_evtype(struct perf_session
*session
,
1566 struct perf_evsel
*pos
;
1568 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1569 if (pos
->attr
.type
== type
)
1575 void perf_evsel__print_ip(struct perf_evsel
*evsel
, union perf_event
*event
,
1576 struct perf_sample
*sample
, struct machine
*machine
,
1577 int print_sym
, int print_dso
, int print_symoffset
)
1579 struct addr_location al
;
1580 struct callchain_cursor_node
*node
;
1582 if (perf_event__preprocess_sample(event
, machine
, &al
, sample
,
1584 error("problem processing %d event, skipping it.\n",
1585 event
->header
.type
);
1589 if (symbol_conf
.use_callchain
&& sample
->callchain
) {
1592 if (machine__resolve_callchain(machine
, evsel
, al
.thread
,
1593 sample
, NULL
) != 0) {
1595 error("Failed to resolve callchain. Skipping\n");
1598 callchain_cursor_commit(&callchain_cursor
);
1601 node
= callchain_cursor_current(&callchain_cursor
);
1605 printf("\t%16" PRIx64
, node
->ip
);
1608 symbol__fprintf_symname(node
->sym
, stdout
);
1612 map__fprintf_dsoname(node
->map
, stdout
);
1617 callchain_cursor_advance(&callchain_cursor
);
1621 printf("%16" PRIx64
, sample
->ip
);
1624 if (print_symoffset
)
1625 symbol__fprintf_symname_offs(al
.sym
, &al
,
1628 symbol__fprintf_symname(al
.sym
, stdout
);
1633 map__fprintf_dsoname(al
.map
, stdout
);
1639 int perf_session__cpu_bitmap(struct perf_session
*session
,
1640 const char *cpu_list
, unsigned long *cpu_bitmap
)
1643 struct cpu_map
*map
;
1645 for (i
= 0; i
< PERF_TYPE_MAX
; ++i
) {
1646 struct perf_evsel
*evsel
;
1648 evsel
= perf_session__find_first_evtype(session
, i
);
1652 if (!(evsel
->attr
.sample_type
& PERF_SAMPLE_CPU
)) {
1653 pr_err("File does not contain CPU events. "
1654 "Remove -c option to proceed.\n");
1659 map
= cpu_map__new(cpu_list
);
1661 pr_err("Invalid cpu_list\n");
1665 for (i
= 0; i
< map
->nr
; i
++) {
1666 int cpu
= map
->map
[i
];
1668 if (cpu
>= MAX_NR_CPUS
) {
1669 pr_err("Requested CPU %d too large. "
1670 "Consider raising MAX_NR_CPUS\n", cpu
);
1674 set_bit(cpu
, cpu_bitmap
);
1680 void perf_session__fprintf_info(struct perf_session
*session
, FILE *fp
,
1686 if (session
== NULL
|| fp
== NULL
)
1689 ret
= fstat(session
->fd
, &st
);
1693 fprintf(fp
, "# ========\n");
1694 fprintf(fp
, "# captured on: %s", ctime(&st
.st_ctime
));
1695 perf_header__fprintf_info(session
, fp
, full
);
1696 fprintf(fp
, "# ========\n#\n");
1700 int __perf_session__set_tracepoints_handlers(struct perf_session
*session
,
1701 const struct perf_evsel_str_handler
*assocs
,
1704 struct perf_evlist
*evlist
= session
->evlist
;
1705 struct event_format
*format
;
1706 struct perf_evsel
*evsel
;
1707 char *tracepoint
, *name
;
1711 for (i
= 0; i
< nr_assocs
; i
++) {
1713 tracepoint
= strdup(assocs
[i
].name
);
1714 if (tracepoint
== NULL
)
1718 name
= strchr(tracepoint
, ':');
1723 format
= pevent_find_event_by_name(session
->pevent
,
1725 if (format
== NULL
) {
1727 * Adding a handler for an event not in the session,
1733 evsel
= perf_evlist__find_tracepoint_by_id(evlist
, format
->id
);
1738 if (evsel
->handler
.func
!= NULL
)
1740 evsel
->handler
.func
= assocs
[i
].handler
;