1 #define _FILE_OFFSET_BITS 64
3 #include <linux/kernel.h>
17 #include "event-parse.h"
18 #include "perf_regs.h"
22 static int perf_session__open(struct perf_session
*self
, bool force
)
24 struct stat input_stat
;
26 if (!strcmp(self
->filename
, "-")) {
28 self
->fd
= STDIN_FILENO
;
30 if (perf_session__read_header(self
, self
->fd
) < 0)
31 pr_err("incompatible file format (rerun with -v to learn more)");
36 self
->fd
= open(self
->filename
, O_RDONLY
);
40 pr_err("failed to open %s: %s", self
->filename
, strerror(err
));
41 if (err
== ENOENT
&& !strcmp(self
->filename
, "perf.data"))
42 pr_err(" (try 'perf record' first)");
47 if (fstat(self
->fd
, &input_stat
) < 0)
50 if (!force
&& input_stat
.st_uid
&& (input_stat
.st_uid
!= geteuid())) {
51 pr_err("file %s not owned by current user or root\n",
56 if (!input_stat
.st_size
) {
57 pr_info("zero-sized file (%s), nothing to do!\n",
62 if (perf_session__read_header(self
, self
->fd
) < 0) {
63 pr_err("incompatible file format (rerun with -v to learn more)");
67 if (!perf_evlist__valid_sample_type(self
->evlist
)) {
68 pr_err("non matching sample_type");
72 if (!perf_evlist__valid_sample_id_all(self
->evlist
)) {
73 pr_err("non matching sample_id_all");
77 self
->size
= input_stat
.st_size
;
86 void perf_session__set_id_hdr_size(struct perf_session
*session
)
88 u16 id_hdr_size
= perf_evlist__id_hdr_size(session
->evlist
);
90 session
->host_machine
.id_hdr_size
= id_hdr_size
;
91 machines__set_id_hdr_size(&session
->machines
, id_hdr_size
);
94 int perf_session__create_kernel_maps(struct perf_session
*self
)
96 int ret
= machine__create_kernel_maps(&self
->host_machine
);
99 ret
= machines__create_guest_kernel_maps(&self
->machines
);
103 static void perf_session__destroy_kernel_maps(struct perf_session
*self
)
105 machine__destroy_kernel_maps(&self
->host_machine
);
106 machines__destroy_guest_kernel_maps(&self
->machines
);
109 struct perf_session
*perf_session__new(const char *filename
, int mode
,
110 bool force
, bool repipe
,
111 struct perf_tool
*tool
)
113 struct perf_session
*self
;
117 if (!filename
|| !strlen(filename
)) {
118 if (!fstat(STDIN_FILENO
, &st
) && S_ISFIFO(st
.st_mode
))
121 filename
= "perf.data";
124 len
= strlen(filename
);
125 self
= zalloc(sizeof(*self
) + len
);
130 memcpy(self
->filename
, filename
, len
);
132 * On 64bit we can mmap the data file in one go. No need for tiny mmap
133 * slices. On 32bit we use 32MB.
135 #if BITS_PER_LONG == 64
136 self
->mmap_window
= ULLONG_MAX
;
138 self
->mmap_window
= 32 * 1024 * 1024ULL;
140 self
->machines
= RB_ROOT
;
141 self
->repipe
= repipe
;
142 INIT_LIST_HEAD(&self
->ordered_samples
.samples
);
143 INIT_LIST_HEAD(&self
->ordered_samples
.sample_cache
);
144 INIT_LIST_HEAD(&self
->ordered_samples
.to_free
);
145 machine__init(&self
->host_machine
, "", HOST_KERNEL_ID
);
146 hists__init(&self
->hists
);
148 if (mode
== O_RDONLY
) {
149 if (perf_session__open(self
, force
) < 0)
151 perf_session__set_id_hdr_size(self
);
152 } else if (mode
== O_WRONLY
) {
154 * In O_RDONLY mode this will be performed when reading the
155 * kernel MMAP event, in perf_event__process_mmap().
157 if (perf_session__create_kernel_maps(self
) < 0)
161 if (tool
&& tool
->ordering_requires_timestamps
&&
162 tool
->ordered_samples
&& !perf_evlist__sample_id_all(self
->evlist
)) {
163 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
164 tool
->ordered_samples
= false;
170 perf_session__delete(self
);
174 static void machine__delete_dead_threads(struct machine
*machine
)
176 struct thread
*n
, *t
;
178 list_for_each_entry_safe(t
, n
, &machine
->dead_threads
, node
) {
184 static void perf_session__delete_dead_threads(struct perf_session
*session
)
186 machine__delete_dead_threads(&session
->host_machine
);
189 static void machine__delete_threads(struct machine
*self
)
191 struct rb_node
*nd
= rb_first(&self
->threads
);
194 struct thread
*t
= rb_entry(nd
, struct thread
, rb_node
);
196 rb_erase(&t
->rb_node
, &self
->threads
);
202 static void perf_session__delete_threads(struct perf_session
*session
)
204 machine__delete_threads(&session
->host_machine
);
207 void perf_session__delete(struct perf_session
*self
)
209 perf_session__destroy_kernel_maps(self
);
210 perf_session__delete_dead_threads(self
);
211 perf_session__delete_threads(self
);
212 machine__exit(&self
->host_machine
);
218 void machine__remove_thread(struct machine
*self
, struct thread
*th
)
220 self
->last_match
= NULL
;
221 rb_erase(&th
->rb_node
, &self
->threads
);
223 * We may have references to this thread, for instance in some hist_entry
224 * instances, so just move them to a separate list.
226 list_add_tail(&th
->node
, &self
->dead_threads
);
229 static bool symbol__match_parent_regex(struct symbol
*sym
)
231 if (sym
->name
&& !regexec(&parent_regex
, sym
->name
, 0, NULL
, 0))
237 static const u8 cpumodes
[] = {
238 PERF_RECORD_MISC_USER
,
239 PERF_RECORD_MISC_KERNEL
,
240 PERF_RECORD_MISC_GUEST_USER
,
241 PERF_RECORD_MISC_GUEST_KERNEL
243 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
245 static void ip__resolve_ams(struct machine
*self
, struct thread
*thread
,
246 struct addr_map_symbol
*ams
,
249 struct addr_location al
;
253 memset(&al
, 0, sizeof(al
));
255 for (i
= 0; i
< NCPUMODES
; i
++) {
258 * We cannot use the header.misc hint to determine whether a
259 * branch stack address is user, kernel, guest, hypervisor.
260 * Branches may straddle the kernel/user/hypervisor boundaries.
261 * Thus, we have to try consecutively until we find a match
262 * or else, the symbol is unknown
264 thread__find_addr_location(thread
, self
, m
, MAP__FUNCTION
,
271 ams
->al_addr
= al
.addr
;
276 struct branch_info
*machine__resolve_bstack(struct machine
*self
,
278 struct branch_stack
*bs
)
280 struct branch_info
*bi
;
283 bi
= calloc(bs
->nr
, sizeof(struct branch_info
));
287 for (i
= 0; i
< bs
->nr
; i
++) {
288 ip__resolve_ams(self
, thr
, &bi
[i
].to
, bs
->entries
[i
].to
);
289 ip__resolve_ams(self
, thr
, &bi
[i
].from
, bs
->entries
[i
].from
);
290 bi
[i
].flags
= bs
->entries
[i
].flags
;
295 static int machine__resolve_callchain_sample(struct machine
*machine
,
296 struct thread
*thread
,
297 struct ip_callchain
*chain
,
298 struct symbol
**parent
)
301 u8 cpumode
= PERF_RECORD_MISC_USER
;
305 callchain_cursor_reset(&callchain_cursor
);
307 if (chain
->nr
> PERF_MAX_STACK_DEPTH
) {
308 pr_warning("corrupted callchain. skipping...\n");
312 for (i
= 0; i
< chain
->nr
; i
++) {
314 struct addr_location al
;
316 if (callchain_param
.order
== ORDER_CALLEE
)
319 ip
= chain
->ips
[chain
->nr
- i
- 1];
321 if (ip
>= PERF_CONTEXT_MAX
) {
323 case PERF_CONTEXT_HV
:
324 cpumode
= PERF_RECORD_MISC_HYPERVISOR
;
326 case PERF_CONTEXT_KERNEL
:
327 cpumode
= PERF_RECORD_MISC_KERNEL
;
329 case PERF_CONTEXT_USER
:
330 cpumode
= PERF_RECORD_MISC_USER
;
333 pr_debug("invalid callchain context: "
334 "%"PRId64
"\n", (s64
) ip
);
336 * It seems the callchain is corrupted.
339 callchain_cursor_reset(&callchain_cursor
);
346 thread__find_addr_location(thread
, machine
, cpumode
,
347 MAP__FUNCTION
, ip
, &al
, NULL
);
348 if (al
.sym
!= NULL
) {
349 if (sort__has_parent
&& !*parent
&&
350 symbol__match_parent_regex(al
.sym
))
352 if (!symbol_conf
.use_callchain
)
356 err
= callchain_cursor_append(&callchain_cursor
,
365 static int unwind_entry(struct unwind_entry
*entry
, void *arg
)
367 struct callchain_cursor
*cursor
= arg
;
368 return callchain_cursor_append(cursor
, entry
->ip
,
369 entry
->map
, entry
->sym
);
372 int machine__resolve_callchain(struct machine
*machine
,
373 struct perf_evsel
*evsel
,
374 struct thread
*thread
,
375 struct perf_sample
*sample
,
376 struct symbol
**parent
)
381 callchain_cursor_reset(&callchain_cursor
);
383 ret
= machine__resolve_callchain_sample(machine
, thread
,
384 sample
->callchain
, parent
);
388 /* Can we do dwarf post unwind? */
389 if (!((evsel
->attr
.sample_type
& PERF_SAMPLE_REGS_USER
) &&
390 (evsel
->attr
.sample_type
& PERF_SAMPLE_STACK_USER
)))
393 /* Bail out if nothing was captured. */
394 if ((!sample
->user_regs
.regs
) ||
395 (!sample
->user_stack
.size
))
398 return unwind__get_entries(unwind_entry
, &callchain_cursor
, machine
,
399 thread
, evsel
->attr
.sample_regs_user
,
404 static int process_event_synth_tracing_data_stub(union perf_event
*event
406 struct perf_session
*session
409 dump_printf(": unhandled!\n");
413 static int process_event_synth_attr_stub(union perf_event
*event __maybe_unused
,
414 struct perf_evlist
**pevlist
417 dump_printf(": unhandled!\n");
421 static int process_event_sample_stub(struct perf_tool
*tool __maybe_unused
,
422 union perf_event
*event __maybe_unused
,
423 struct perf_sample
*sample __maybe_unused
,
424 struct perf_evsel
*evsel __maybe_unused
,
425 struct machine
*machine __maybe_unused
)
427 dump_printf(": unhandled!\n");
431 static int process_event_stub(struct perf_tool
*tool __maybe_unused
,
432 union perf_event
*event __maybe_unused
,
433 struct perf_sample
*sample __maybe_unused
,
434 struct machine
*machine __maybe_unused
)
436 dump_printf(": unhandled!\n");
440 static int process_finished_round_stub(struct perf_tool
*tool __maybe_unused
,
441 union perf_event
*event __maybe_unused
,
442 struct perf_session
*perf_session
445 dump_printf(": unhandled!\n");
449 static int process_event_type_stub(struct perf_tool
*tool __maybe_unused
,
450 union perf_event
*event __maybe_unused
)
452 dump_printf(": unhandled!\n");
456 static int process_finished_round(struct perf_tool
*tool
,
457 union perf_event
*event
,
458 struct perf_session
*session
);
460 static void perf_tool__fill_defaults(struct perf_tool
*tool
)
462 if (tool
->sample
== NULL
)
463 tool
->sample
= process_event_sample_stub
;
464 if (tool
->mmap
== NULL
)
465 tool
->mmap
= process_event_stub
;
466 if (tool
->comm
== NULL
)
467 tool
->comm
= process_event_stub
;
468 if (tool
->fork
== NULL
)
469 tool
->fork
= process_event_stub
;
470 if (tool
->exit
== NULL
)
471 tool
->exit
= process_event_stub
;
472 if (tool
->lost
== NULL
)
473 tool
->lost
= perf_event__process_lost
;
474 if (tool
->read
== NULL
)
475 tool
->read
= process_event_sample_stub
;
476 if (tool
->throttle
== NULL
)
477 tool
->throttle
= process_event_stub
;
478 if (tool
->unthrottle
== NULL
)
479 tool
->unthrottle
= process_event_stub
;
480 if (tool
->attr
== NULL
)
481 tool
->attr
= process_event_synth_attr_stub
;
482 if (tool
->event_type
== NULL
)
483 tool
->event_type
= process_event_type_stub
;
484 if (tool
->tracing_data
== NULL
)
485 tool
->tracing_data
= process_event_synth_tracing_data_stub
;
486 if (tool
->build_id
== NULL
)
487 tool
->build_id
= process_finished_round_stub
;
488 if (tool
->finished_round
== NULL
) {
489 if (tool
->ordered_samples
)
490 tool
->finished_round
= process_finished_round
;
492 tool
->finished_round
= process_finished_round_stub
;
496 void mem_bswap_32(void *src
, int byte_size
)
499 while (byte_size
> 0) {
501 byte_size
-= sizeof(u32
);
506 void mem_bswap_64(void *src
, int byte_size
)
510 while (byte_size
> 0) {
512 byte_size
-= sizeof(u64
);
517 static void swap_sample_id_all(union perf_event
*event
, void *data
)
519 void *end
= (void *) event
+ event
->header
.size
;
520 int size
= end
- data
;
522 BUG_ON(size
% sizeof(u64
));
523 mem_bswap_64(data
, size
);
526 static void perf_event__all64_swap(union perf_event
*event
,
527 bool sample_id_all __maybe_unused
)
529 struct perf_event_header
*hdr
= &event
->header
;
530 mem_bswap_64(hdr
+ 1, event
->header
.size
- sizeof(*hdr
));
533 static void perf_event__comm_swap(union perf_event
*event
, bool sample_id_all
)
535 event
->comm
.pid
= bswap_32(event
->comm
.pid
);
536 event
->comm
.tid
= bswap_32(event
->comm
.tid
);
539 void *data
= &event
->comm
.comm
;
541 data
+= PERF_ALIGN(strlen(data
) + 1, sizeof(u64
));
542 swap_sample_id_all(event
, data
);
546 static void perf_event__mmap_swap(union perf_event
*event
,
549 event
->mmap
.pid
= bswap_32(event
->mmap
.pid
);
550 event
->mmap
.tid
= bswap_32(event
->mmap
.tid
);
551 event
->mmap
.start
= bswap_64(event
->mmap
.start
);
552 event
->mmap
.len
= bswap_64(event
->mmap
.len
);
553 event
->mmap
.pgoff
= bswap_64(event
->mmap
.pgoff
);
556 void *data
= &event
->mmap
.filename
;
558 data
+= PERF_ALIGN(strlen(data
) + 1, sizeof(u64
));
559 swap_sample_id_all(event
, data
);
563 static void perf_event__task_swap(union perf_event
*event
, bool sample_id_all
)
565 event
->fork
.pid
= bswap_32(event
->fork
.pid
);
566 event
->fork
.tid
= bswap_32(event
->fork
.tid
);
567 event
->fork
.ppid
= bswap_32(event
->fork
.ppid
);
568 event
->fork
.ptid
= bswap_32(event
->fork
.ptid
);
569 event
->fork
.time
= bswap_64(event
->fork
.time
);
572 swap_sample_id_all(event
, &event
->fork
+ 1);
575 static void perf_event__read_swap(union perf_event
*event
, bool sample_id_all
)
577 event
->read
.pid
= bswap_32(event
->read
.pid
);
578 event
->read
.tid
= bswap_32(event
->read
.tid
);
579 event
->read
.value
= bswap_64(event
->read
.value
);
580 event
->read
.time_enabled
= bswap_64(event
->read
.time_enabled
);
581 event
->read
.time_running
= bswap_64(event
->read
.time_running
);
582 event
->read
.id
= bswap_64(event
->read
.id
);
585 swap_sample_id_all(event
, &event
->read
+ 1);
588 static u8
revbyte(u8 b
)
590 int rev
= (b
>> 4) | ((b
& 0xf) << 4);
591 rev
= ((rev
& 0xcc) >> 2) | ((rev
& 0x33) << 2);
592 rev
= ((rev
& 0xaa) >> 1) | ((rev
& 0x55) << 1);
597 * XXX this is hack in attempt to carry flags bitfield
598 * throught endian village. ABI says:
600 * Bit-fields are allocated from right to left (least to most significant)
601 * on little-endian implementations and from left to right (most to least
602 * significant) on big-endian implementations.
604 * The above seems to be byte specific, so we need to reverse each
605 * byte of the bitfield. 'Internet' also says this might be implementation
606 * specific and we probably need proper fix and carry perf_event_attr
607 * bitfield flags in separate data file FEAT_ section. Thought this seems
610 static void swap_bitfield(u8
*p
, unsigned len
)
614 for (i
= 0; i
< len
; i
++) {
620 /* exported for swapping attributes in file header */
621 void perf_event__attr_swap(struct perf_event_attr
*attr
)
623 attr
->type
= bswap_32(attr
->type
);
624 attr
->size
= bswap_32(attr
->size
);
625 attr
->config
= bswap_64(attr
->config
);
626 attr
->sample_period
= bswap_64(attr
->sample_period
);
627 attr
->sample_type
= bswap_64(attr
->sample_type
);
628 attr
->read_format
= bswap_64(attr
->read_format
);
629 attr
->wakeup_events
= bswap_32(attr
->wakeup_events
);
630 attr
->bp_type
= bswap_32(attr
->bp_type
);
631 attr
->bp_addr
= bswap_64(attr
->bp_addr
);
632 attr
->bp_len
= bswap_64(attr
->bp_len
);
634 swap_bitfield((u8
*) (&attr
->read_format
+ 1), sizeof(u64
));
637 static void perf_event__hdr_attr_swap(union perf_event
*event
,
638 bool sample_id_all __maybe_unused
)
642 perf_event__attr_swap(&event
->attr
.attr
);
644 size
= event
->header
.size
;
645 size
-= (void *)&event
->attr
.id
- (void *)event
;
646 mem_bswap_64(event
->attr
.id
, size
);
649 static void perf_event__event_type_swap(union perf_event
*event
,
650 bool sample_id_all __maybe_unused
)
652 event
->event_type
.event_type
.event_id
=
653 bswap_64(event
->event_type
.event_type
.event_id
);
656 static void perf_event__tracing_data_swap(union perf_event
*event
,
657 bool sample_id_all __maybe_unused
)
659 event
->tracing_data
.size
= bswap_32(event
->tracing_data
.size
);
662 typedef void (*perf_event__swap_op
)(union perf_event
*event
,
665 static perf_event__swap_op perf_event__swap_ops
[] = {
666 [PERF_RECORD_MMAP
] = perf_event__mmap_swap
,
667 [PERF_RECORD_COMM
] = perf_event__comm_swap
,
668 [PERF_RECORD_FORK
] = perf_event__task_swap
,
669 [PERF_RECORD_EXIT
] = perf_event__task_swap
,
670 [PERF_RECORD_LOST
] = perf_event__all64_swap
,
671 [PERF_RECORD_READ
] = perf_event__read_swap
,
672 [PERF_RECORD_SAMPLE
] = perf_event__all64_swap
,
673 [PERF_RECORD_HEADER_ATTR
] = perf_event__hdr_attr_swap
,
674 [PERF_RECORD_HEADER_EVENT_TYPE
] = perf_event__event_type_swap
,
675 [PERF_RECORD_HEADER_TRACING_DATA
] = perf_event__tracing_data_swap
,
676 [PERF_RECORD_HEADER_BUILD_ID
] = NULL
,
677 [PERF_RECORD_HEADER_MAX
] = NULL
,
680 struct sample_queue
{
683 union perf_event
*event
;
684 struct list_head list
;
687 static void perf_session_free_sample_buffers(struct perf_session
*session
)
689 struct ordered_samples
*os
= &session
->ordered_samples
;
691 while (!list_empty(&os
->to_free
)) {
692 struct sample_queue
*sq
;
694 sq
= list_entry(os
->to_free
.next
, struct sample_queue
, list
);
700 static int perf_session_deliver_event(struct perf_session
*session
,
701 union perf_event
*event
,
702 struct perf_sample
*sample
,
703 struct perf_tool
*tool
,
706 static int flush_sample_queue(struct perf_session
*s
,
707 struct perf_tool
*tool
)
709 struct ordered_samples
*os
= &s
->ordered_samples
;
710 struct list_head
*head
= &os
->samples
;
711 struct sample_queue
*tmp
, *iter
;
712 struct perf_sample sample
;
713 u64 limit
= os
->next_flush
;
714 u64 last_ts
= os
->last_sample
? os
->last_sample
->timestamp
: 0ULL;
715 unsigned idx
= 0, progress_next
= os
->nr_samples
/ 16;
718 if (!tool
->ordered_samples
|| !limit
)
721 list_for_each_entry_safe(iter
, tmp
, head
, list
) {
722 if (iter
->timestamp
> limit
)
725 ret
= perf_evlist__parse_sample(s
->evlist
, iter
->event
, &sample
);
727 pr_err("Can't parse sample, err = %d\n", ret
);
729 ret
= perf_session_deliver_event(s
, iter
->event
, &sample
, tool
,
735 os
->last_flush
= iter
->timestamp
;
736 list_del(&iter
->list
);
737 list_add(&iter
->list
, &os
->sample_cache
);
738 if (++idx
>= progress_next
) {
739 progress_next
+= os
->nr_samples
/ 16;
740 ui_progress__update(idx
, os
->nr_samples
,
741 "Processing time ordered events...");
745 if (list_empty(head
)) {
746 os
->last_sample
= NULL
;
747 } else if (last_ts
<= limit
) {
749 list_entry(head
->prev
, struct sample_queue
, list
);
758 * When perf record finishes a pass on every buffers, it records this pseudo
760 * We record the max timestamp t found in the pass n.
761 * Assuming these timestamps are monotonic across cpus, we know that if
762 * a buffer still has events with timestamps below t, they will be all
763 * available and then read in the pass n + 1.
764 * Hence when we start to read the pass n + 2, we can safely flush every
765 * events with timestamps below t.
767 * ============ PASS n =================
770 * cnt1 timestamps | cnt2 timestamps
773 * - | 4 <--- max recorded
775 * ============ PASS n + 1 ==============
778 * cnt1 timestamps | cnt2 timestamps
781 * 5 | 7 <---- max recorded
783 * Flush every events below timestamp 4
785 * ============ PASS n + 2 ==============
788 * cnt1 timestamps | cnt2 timestamps
793 * Flush every events below timestamp 7
796 static int process_finished_round(struct perf_tool
*tool
,
797 union perf_event
*event __maybe_unused
,
798 struct perf_session
*session
)
800 int ret
= flush_sample_queue(session
, tool
);
802 session
->ordered_samples
.next_flush
= session
->ordered_samples
.max_timestamp
;
807 /* The queue is ordered by time */
808 static void __queue_event(struct sample_queue
*new, struct perf_session
*s
)
810 struct ordered_samples
*os
= &s
->ordered_samples
;
811 struct sample_queue
*sample
= os
->last_sample
;
812 u64 timestamp
= new->timestamp
;
816 os
->last_sample
= new;
819 list_add(&new->list
, &os
->samples
);
820 os
->max_timestamp
= timestamp
;
825 * last_sample might point to some random place in the list as it's
826 * the last queued event. We expect that the new event is close to
829 if (sample
->timestamp
<= timestamp
) {
830 while (sample
->timestamp
<= timestamp
) {
831 p
= sample
->list
.next
;
832 if (p
== &os
->samples
) {
833 list_add_tail(&new->list
, &os
->samples
);
834 os
->max_timestamp
= timestamp
;
837 sample
= list_entry(p
, struct sample_queue
, list
);
839 list_add_tail(&new->list
, &sample
->list
);
841 while (sample
->timestamp
> timestamp
) {
842 p
= sample
->list
.prev
;
843 if (p
== &os
->samples
) {
844 list_add(&new->list
, &os
->samples
);
847 sample
= list_entry(p
, struct sample_queue
, list
);
849 list_add(&new->list
, &sample
->list
);
853 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
855 static int perf_session_queue_event(struct perf_session
*s
, union perf_event
*event
,
856 struct perf_sample
*sample
, u64 file_offset
)
858 struct ordered_samples
*os
= &s
->ordered_samples
;
859 struct list_head
*sc
= &os
->sample_cache
;
860 u64 timestamp
= sample
->time
;
861 struct sample_queue
*new;
863 if (!timestamp
|| timestamp
== ~0ULL)
866 if (timestamp
< s
->ordered_samples
.last_flush
) {
867 printf("Warning: Timestamp below last timeslice flush\n");
871 if (!list_empty(sc
)) {
872 new = list_entry(sc
->next
, struct sample_queue
, list
);
873 list_del(&new->list
);
874 } else if (os
->sample_buffer
) {
875 new = os
->sample_buffer
+ os
->sample_buffer_idx
;
876 if (++os
->sample_buffer_idx
== MAX_SAMPLE_BUFFER
)
877 os
->sample_buffer
= NULL
;
879 os
->sample_buffer
= malloc(MAX_SAMPLE_BUFFER
* sizeof(*new));
880 if (!os
->sample_buffer
)
882 list_add(&os
->sample_buffer
->list
, &os
->to_free
);
883 os
->sample_buffer_idx
= 2;
884 new = os
->sample_buffer
+ 1;
887 new->timestamp
= timestamp
;
888 new->file_offset
= file_offset
;
891 __queue_event(new, s
);
896 static void callchain__printf(struct perf_sample
*sample
)
900 printf("... chain: nr:%" PRIu64
"\n", sample
->callchain
->nr
);
902 for (i
= 0; i
< sample
->callchain
->nr
; i
++)
903 printf("..... %2d: %016" PRIx64
"\n",
904 i
, sample
->callchain
->ips
[i
]);
907 static void branch_stack__printf(struct perf_sample
*sample
)
911 printf("... branch stack: nr:%" PRIu64
"\n", sample
->branch_stack
->nr
);
913 for (i
= 0; i
< sample
->branch_stack
->nr
; i
++)
914 printf("..... %2"PRIu64
": %016" PRIx64
" -> %016" PRIx64
"\n",
915 i
, sample
->branch_stack
->entries
[i
].from
,
916 sample
->branch_stack
->entries
[i
].to
);
919 static void regs_dump__printf(u64 mask
, u64
*regs
)
923 for_each_set_bit(rid
, (unsigned long *) &mask
, sizeof(mask
) * 8) {
926 printf(".... %-5s 0x%" PRIx64
"\n",
927 perf_reg_name(rid
), val
);
931 static void regs_user__printf(struct perf_sample
*sample
, u64 mask
)
933 struct regs_dump
*user_regs
= &sample
->user_regs
;
935 if (user_regs
->regs
) {
936 printf("... user regs: mask 0x%" PRIx64
"\n", mask
);
937 regs_dump__printf(mask
, user_regs
->regs
);
941 static void stack_user__printf(struct stack_dump
*dump
)
943 printf("... ustack: size %" PRIu64
", offset 0x%x\n",
944 dump
->size
, dump
->offset
);
947 static void perf_session__print_tstamp(struct perf_session
*session
,
948 union perf_event
*event
,
949 struct perf_sample
*sample
)
951 u64 sample_type
= perf_evlist__sample_type(session
->evlist
);
953 if (event
->header
.type
!= PERF_RECORD_SAMPLE
&&
954 !perf_evlist__sample_id_all(session
->evlist
)) {
955 fputs("-1 -1 ", stdout
);
959 if ((sample_type
& PERF_SAMPLE_CPU
))
960 printf("%u ", sample
->cpu
);
962 if (sample_type
& PERF_SAMPLE_TIME
)
963 printf("%" PRIu64
" ", sample
->time
);
966 static void dump_event(struct perf_session
*session
, union perf_event
*event
,
967 u64 file_offset
, struct perf_sample
*sample
)
972 printf("\n%#" PRIx64
" [%#x]: event: %d\n",
973 file_offset
, event
->header
.size
, event
->header
.type
);
978 perf_session__print_tstamp(session
, event
, sample
);
980 printf("%#" PRIx64
" [%#x]: PERF_RECORD_%s", file_offset
,
981 event
->header
.size
, perf_event__name(event
->header
.type
));
984 static void dump_sample(struct perf_evsel
*evsel
, union perf_event
*event
,
985 struct perf_sample
*sample
)
992 printf("(IP, %d): %d/%d: %#" PRIx64
" period: %" PRIu64
" addr: %#" PRIx64
"\n",
993 event
->header
.misc
, sample
->pid
, sample
->tid
, sample
->ip
,
994 sample
->period
, sample
->addr
);
996 sample_type
= evsel
->attr
.sample_type
;
998 if (sample_type
& PERF_SAMPLE_CALLCHAIN
)
999 callchain__printf(sample
);
1001 if (sample_type
& PERF_SAMPLE_BRANCH_STACK
)
1002 branch_stack__printf(sample
);
1004 if (sample_type
& PERF_SAMPLE_REGS_USER
)
1005 regs_user__printf(sample
, evsel
->attr
.sample_regs_user
);
1007 if (sample_type
& PERF_SAMPLE_STACK_USER
)
1008 stack_user__printf(&sample
->user_stack
);
1011 static struct machine
*
1012 perf_session__find_machine_for_cpumode(struct perf_session
*session
,
1013 union perf_event
*event
)
1015 const u8 cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
1018 ((cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
) ||
1019 (cpumode
== PERF_RECORD_MISC_GUEST_USER
))) {
1022 if (event
->header
.type
== PERF_RECORD_MMAP
)
1023 pid
= event
->mmap
.pid
;
1025 pid
= event
->ip
.pid
;
1027 return perf_session__findnew_machine(session
, pid
);
1030 return perf_session__find_host_machine(session
);
1033 static int perf_session_deliver_event(struct perf_session
*session
,
1034 union perf_event
*event
,
1035 struct perf_sample
*sample
,
1036 struct perf_tool
*tool
,
1039 struct perf_evsel
*evsel
;
1040 struct machine
*machine
;
1042 dump_event(session
, event
, file_offset
, sample
);
1044 evsel
= perf_evlist__id2evsel(session
->evlist
, sample
->id
);
1045 if (evsel
!= NULL
&& event
->header
.type
!= PERF_RECORD_SAMPLE
) {
1047 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
1048 * because the tools right now may apply filters, discarding
1049 * some of the samples. For consistency, in the future we
1050 * should have something like nr_filtered_samples and remove
1051 * the sample->period from total_sample_period, etc, KISS for
1054 * Also testing against NULL allows us to handle files without
1055 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
1056 * future probably it'll be a good idea to restrict event
1057 * processing via perf_session to files with both set.
1059 hists__inc_nr_events(&evsel
->hists
, event
->header
.type
);
1062 machine
= perf_session__find_machine_for_cpumode(session
, event
);
1064 switch (event
->header
.type
) {
1065 case PERF_RECORD_SAMPLE
:
1066 dump_sample(evsel
, event
, sample
);
1067 if (evsel
== NULL
) {
1068 ++session
->hists
.stats
.nr_unknown_id
;
1071 if (machine
== NULL
) {
1072 ++session
->hists
.stats
.nr_unprocessable_samples
;
1075 return tool
->sample(tool
, event
, sample
, evsel
, machine
);
1076 case PERF_RECORD_MMAP
:
1077 return tool
->mmap(tool
, event
, sample
, machine
);
1078 case PERF_RECORD_COMM
:
1079 return tool
->comm(tool
, event
, sample
, machine
);
1080 case PERF_RECORD_FORK
:
1081 return tool
->fork(tool
, event
, sample
, machine
);
1082 case PERF_RECORD_EXIT
:
1083 return tool
->exit(tool
, event
, sample
, machine
);
1084 case PERF_RECORD_LOST
:
1085 if (tool
->lost
== perf_event__process_lost
)
1086 session
->hists
.stats
.total_lost
+= event
->lost
.lost
;
1087 return tool
->lost(tool
, event
, sample
, machine
);
1088 case PERF_RECORD_READ
:
1089 return tool
->read(tool
, event
, sample
, evsel
, machine
);
1090 case PERF_RECORD_THROTTLE
:
1091 return tool
->throttle(tool
, event
, sample
, machine
);
1092 case PERF_RECORD_UNTHROTTLE
:
1093 return tool
->unthrottle(tool
, event
, sample
, machine
);
1095 ++session
->hists
.stats
.nr_unknown_events
;
1100 static int perf_session__preprocess_sample(struct perf_session
*session
,
1101 union perf_event
*event
, struct perf_sample
*sample
)
1103 if (event
->header
.type
!= PERF_RECORD_SAMPLE
||
1104 !(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_CALLCHAIN
))
1107 if (!ip_callchain__valid(sample
->callchain
, event
)) {
1108 pr_debug("call-chain problem with event, skipping it.\n");
1109 ++session
->hists
.stats
.nr_invalid_chains
;
1110 session
->hists
.stats
.total_invalid_chains
+= sample
->period
;
1116 static int perf_session__process_user_event(struct perf_session
*session
, union perf_event
*event
,
1117 struct perf_tool
*tool
, u64 file_offset
)
1121 dump_event(session
, event
, file_offset
, NULL
);
1123 /* These events are processed right away */
1124 switch (event
->header
.type
) {
1125 case PERF_RECORD_HEADER_ATTR
:
1126 err
= tool
->attr(event
, &session
->evlist
);
1128 perf_session__set_id_hdr_size(session
);
1130 case PERF_RECORD_HEADER_EVENT_TYPE
:
1131 return tool
->event_type(tool
, event
);
1132 case PERF_RECORD_HEADER_TRACING_DATA
:
1133 /* setup for reading amidst mmap */
1134 lseek(session
->fd
, file_offset
, SEEK_SET
);
1135 return tool
->tracing_data(event
, session
);
1136 case PERF_RECORD_HEADER_BUILD_ID
:
1137 return tool
->build_id(tool
, event
, session
);
1138 case PERF_RECORD_FINISHED_ROUND
:
1139 return tool
->finished_round(tool
, event
, session
);
1145 static void event_swap(union perf_event
*event
, bool sample_id_all
)
1147 perf_event__swap_op swap
;
1149 swap
= perf_event__swap_ops
[event
->header
.type
];
1151 swap(event
, sample_id_all
);
1154 static int perf_session__process_event(struct perf_session
*session
,
1155 union perf_event
*event
,
1156 struct perf_tool
*tool
,
1159 struct perf_sample sample
;
1162 if (session
->header
.needs_swap
)
1163 event_swap(event
, perf_evlist__sample_id_all(session
->evlist
));
1165 if (event
->header
.type
>= PERF_RECORD_HEADER_MAX
)
1168 hists__inc_nr_events(&session
->hists
, event
->header
.type
);
1170 if (event
->header
.type
>= PERF_RECORD_USER_TYPE_START
)
1171 return perf_session__process_user_event(session
, event
, tool
, file_offset
);
1174 * For all kernel events we get the sample data
1176 ret
= perf_evlist__parse_sample(session
->evlist
, event
, &sample
);
1180 /* Preprocess sample records - precheck callchains */
1181 if (perf_session__preprocess_sample(session
, event
, &sample
))
1184 if (tool
->ordered_samples
) {
1185 ret
= perf_session_queue_event(session
, event
, &sample
,
1191 return perf_session_deliver_event(session
, event
, &sample
, tool
,
1195 void perf_event_header__bswap(struct perf_event_header
*self
)
1197 self
->type
= bswap_32(self
->type
);
1198 self
->misc
= bswap_16(self
->misc
);
1199 self
->size
= bswap_16(self
->size
);
1202 struct thread
*perf_session__findnew(struct perf_session
*session
, pid_t pid
)
1204 return machine__findnew_thread(&session
->host_machine
, pid
);
1207 static struct thread
*perf_session__register_idle_thread(struct perf_session
*self
)
1209 struct thread
*thread
= perf_session__findnew(self
, 0);
1211 if (thread
== NULL
|| thread__set_comm(thread
, "swapper")) {
1212 pr_err("problem inserting idle task.\n");
1219 static void perf_session__warn_about_errors(const struct perf_session
*session
,
1220 const struct perf_tool
*tool
)
1222 if (tool
->lost
== perf_event__process_lost
&&
1223 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
] != 0) {
1224 ui__warning("Processed %d events and lost %d chunks!\n\n"
1225 "Check IO/CPU overload!\n\n",
1226 session
->hists
.stats
.nr_events
[0],
1227 session
->hists
.stats
.nr_events
[PERF_RECORD_LOST
]);
1230 if (session
->hists
.stats
.nr_unknown_events
!= 0) {
1231 ui__warning("Found %u unknown events!\n\n"
1232 "Is this an older tool processing a perf.data "
1233 "file generated by a more recent tool?\n\n"
1234 "If that is not the case, consider "
1235 "reporting to linux-kernel@vger.kernel.org.\n\n",
1236 session
->hists
.stats
.nr_unknown_events
);
1239 if (session
->hists
.stats
.nr_unknown_id
!= 0) {
1240 ui__warning("%u samples with id not present in the header\n",
1241 session
->hists
.stats
.nr_unknown_id
);
1244 if (session
->hists
.stats
.nr_invalid_chains
!= 0) {
1245 ui__warning("Found invalid callchains!\n\n"
1246 "%u out of %u events were discarded for this reason.\n\n"
1247 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1248 session
->hists
.stats
.nr_invalid_chains
,
1249 session
->hists
.stats
.nr_events
[PERF_RECORD_SAMPLE
]);
1252 if (session
->hists
.stats
.nr_unprocessable_samples
!= 0) {
1253 ui__warning("%u unprocessable samples recorded.\n"
1254 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1255 session
->hists
.stats
.nr_unprocessable_samples
);
1259 #define session_done() (*(volatile int *)(&session_done))
1260 volatile int session_done
;
1262 static int __perf_session__process_pipe_events(struct perf_session
*self
,
1263 struct perf_tool
*tool
)
1265 union perf_event
*event
;
1266 uint32_t size
, cur_size
= 0;
1273 perf_tool__fill_defaults(tool
);
1276 cur_size
= sizeof(union perf_event
);
1278 buf
= malloc(cur_size
);
1283 err
= readn(self
->fd
, event
, sizeof(struct perf_event_header
));
1288 pr_err("failed to read event header\n");
1292 if (self
->header
.needs_swap
)
1293 perf_event_header__bswap(&event
->header
);
1295 size
= event
->header
.size
;
1299 if (size
> cur_size
) {
1300 void *new = realloc(buf
, size
);
1302 pr_err("failed to allocate memory to read event\n");
1310 p
+= sizeof(struct perf_event_header
);
1312 if (size
- sizeof(struct perf_event_header
)) {
1313 err
= readn(self
->fd
, p
, size
- sizeof(struct perf_event_header
));
1316 pr_err("unexpected end of event stream\n");
1320 pr_err("failed to read event data\n");
1325 if ((skip
= perf_session__process_event(self
, event
, tool
, head
)) < 0) {
1326 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1327 head
, event
->header
.size
, event
->header
.type
);
1337 if (!session_done())
1343 perf_session__warn_about_errors(self
, tool
);
1344 perf_session_free_sample_buffers(self
);
1348 static union perf_event
*
1349 fetch_mmaped_event(struct perf_session
*session
,
1350 u64 head
, size_t mmap_size
, char *buf
)
1352 union perf_event
*event
;
1355 * Ensure we have enough space remaining to read
1356 * the size of the event in the headers.
1358 if (head
+ sizeof(event
->header
) > mmap_size
)
1361 event
= (union perf_event
*)(buf
+ head
);
1363 if (session
->header
.needs_swap
)
1364 perf_event_header__bswap(&event
->header
);
1366 if (head
+ event
->header
.size
> mmap_size
)
1372 int __perf_session__process_events(struct perf_session
*session
,
1373 u64 data_offset
, u64 data_size
,
1374 u64 file_size
, struct perf_tool
*tool
)
1376 u64 head
, page_offset
, file_offset
, file_pos
, progress_next
;
1377 int err
, mmap_prot
, mmap_flags
, map_idx
= 0;
1378 size_t page_size
, mmap_size
;
1379 char *buf
, *mmaps
[8];
1380 union perf_event
*event
;
1383 perf_tool__fill_defaults(tool
);
1385 page_size
= sysconf(_SC_PAGESIZE
);
1387 page_offset
= page_size
* (data_offset
/ page_size
);
1388 file_offset
= page_offset
;
1389 head
= data_offset
- page_offset
;
1391 if (data_offset
+ data_size
< file_size
)
1392 file_size
= data_offset
+ data_size
;
1394 progress_next
= file_size
/ 16;
1396 mmap_size
= session
->mmap_window
;
1397 if (mmap_size
> file_size
)
1398 mmap_size
= file_size
;
1400 memset(mmaps
, 0, sizeof(mmaps
));
1402 mmap_prot
= PROT_READ
;
1403 mmap_flags
= MAP_SHARED
;
1405 if (session
->header
.needs_swap
) {
1406 mmap_prot
|= PROT_WRITE
;
1407 mmap_flags
= MAP_PRIVATE
;
1410 buf
= mmap(NULL
, mmap_size
, mmap_prot
, mmap_flags
, session
->fd
,
1412 if (buf
== MAP_FAILED
) {
1413 pr_err("failed to mmap file\n");
1417 mmaps
[map_idx
] = buf
;
1418 map_idx
= (map_idx
+ 1) & (ARRAY_SIZE(mmaps
) - 1);
1419 file_pos
= file_offset
+ head
;
1422 event
= fetch_mmaped_event(session
, head
, mmap_size
, buf
);
1424 if (mmaps
[map_idx
]) {
1425 munmap(mmaps
[map_idx
], mmap_size
);
1426 mmaps
[map_idx
] = NULL
;
1429 page_offset
= page_size
* (head
/ page_size
);
1430 file_offset
+= page_offset
;
1431 head
-= page_offset
;
1435 size
= event
->header
.size
;
1438 perf_session__process_event(session
, event
, tool
, file_pos
) < 0) {
1439 pr_err("%#" PRIx64
" [%#x]: failed to process type: %d\n",
1440 file_offset
+ head
, event
->header
.size
,
1441 event
->header
.type
);
1449 if (file_pos
>= progress_next
) {
1450 progress_next
+= file_size
/ 16;
1451 ui_progress__update(file_pos
, file_size
,
1452 "Processing events...");
1455 if (file_pos
< file_size
)
1459 /* do the final flush for ordered samples */
1460 session
->ordered_samples
.next_flush
= ULLONG_MAX
;
1461 err
= flush_sample_queue(session
, tool
);
1463 perf_session__warn_about_errors(session
, tool
);
1464 perf_session_free_sample_buffers(session
);
1468 int perf_session__process_events(struct perf_session
*self
,
1469 struct perf_tool
*tool
)
1473 if (perf_session__register_idle_thread(self
) == NULL
)
1477 err
= __perf_session__process_events(self
,
1478 self
->header
.data_offset
,
1479 self
->header
.data_size
,
1482 err
= __perf_session__process_pipe_events(self
, tool
);
1487 bool perf_session__has_traces(struct perf_session
*session
, const char *msg
)
1489 if (!(perf_evlist__sample_type(session
->evlist
) & PERF_SAMPLE_RAW
)) {
1490 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg
);
1497 int maps__set_kallsyms_ref_reloc_sym(struct map
**maps
,
1498 const char *symbol_name
, u64 addr
)
1502 struct ref_reloc_sym
*ref
;
1504 ref
= zalloc(sizeof(struct ref_reloc_sym
));
1508 ref
->name
= strdup(symbol_name
);
1509 if (ref
->name
== NULL
) {
1514 bracket
= strchr(ref
->name
, ']');
1520 for (i
= 0; i
< MAP__NR_TYPES
; ++i
) {
1521 struct kmap
*kmap
= map__kmap(maps
[i
]);
1522 kmap
->ref_reloc_sym
= ref
;
1528 size_t perf_session__fprintf_dsos(struct perf_session
*self
, FILE *fp
)
1530 return __dsos__fprintf(&self
->host_machine
.kernel_dsos
, fp
) +
1531 __dsos__fprintf(&self
->host_machine
.user_dsos
, fp
) +
1532 machines__fprintf_dsos(&self
->machines
, fp
);
1535 size_t perf_session__fprintf_dsos_buildid(struct perf_session
*self
, FILE *fp
,
1538 size_t ret
= machine__fprintf_dsos_buildid(&self
->host_machine
, fp
, with_hits
);
1539 return ret
+ machines__fprintf_dsos_buildid(&self
->machines
, fp
, with_hits
);
1542 size_t perf_session__fprintf_nr_events(struct perf_session
*session
, FILE *fp
)
1544 struct perf_evsel
*pos
;
1545 size_t ret
= fprintf(fp
, "Aggregated stats:\n");
1547 ret
+= hists__fprintf_nr_events(&session
->hists
, fp
);
1549 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1550 ret
+= fprintf(fp
, "%s stats:\n", perf_evsel__name(pos
));
1551 ret
+= hists__fprintf_nr_events(&pos
->hists
, fp
);
1557 size_t perf_session__fprintf(struct perf_session
*session
, FILE *fp
)
1560 * FIXME: Here we have to actually print all the machines in this
1561 * session, not just the host...
1563 return machine__fprintf(&session
->host_machine
, fp
);
1566 void perf_session__remove_thread(struct perf_session
*session
,
1570 * FIXME: This one makes no sense, we need to remove the thread from
1571 * the machine it belongs to, perf_session can have many machines, so
1572 * doing it always on ->host_machine is wrong. Fix when auditing all
1573 * the 'perf kvm' code.
1575 machine__remove_thread(&session
->host_machine
, th
);
1578 struct perf_evsel
*perf_session__find_first_evtype(struct perf_session
*session
,
1581 struct perf_evsel
*pos
;
1583 list_for_each_entry(pos
, &session
->evlist
->entries
, node
) {
1584 if (pos
->attr
.type
== type
)
1590 void perf_evsel__print_ip(struct perf_evsel
*evsel
, union perf_event
*event
,
1591 struct perf_sample
*sample
, struct machine
*machine
,
1592 int print_sym
, int print_dso
, int print_symoffset
)
1594 struct addr_location al
;
1595 struct callchain_cursor_node
*node
;
1597 if (perf_event__preprocess_sample(event
, machine
, &al
, sample
,
1599 error("problem processing %d event, skipping it.\n",
1600 event
->header
.type
);
1604 if (symbol_conf
.use_callchain
&& sample
->callchain
) {
1607 if (machine__resolve_callchain(machine
, evsel
, al
.thread
,
1608 sample
, NULL
) != 0) {
1610 error("Failed to resolve callchain. Skipping\n");
1613 callchain_cursor_commit(&callchain_cursor
);
1616 node
= callchain_cursor_current(&callchain_cursor
);
1620 printf("\t%16" PRIx64
, node
->ip
);
1623 symbol__fprintf_symname(node
->sym
, stdout
);
1627 map__fprintf_dsoname(node
->map
, stdout
);
1632 callchain_cursor_advance(&callchain_cursor
);
1636 printf("%16" PRIx64
, sample
->ip
);
1639 if (print_symoffset
)
1640 symbol__fprintf_symname_offs(al
.sym
, &al
,
1643 symbol__fprintf_symname(al
.sym
, stdout
);
1648 map__fprintf_dsoname(al
.map
, stdout
);
1654 int perf_session__cpu_bitmap(struct perf_session
*session
,
1655 const char *cpu_list
, unsigned long *cpu_bitmap
)
1658 struct cpu_map
*map
;
1660 for (i
= 0; i
< PERF_TYPE_MAX
; ++i
) {
1661 struct perf_evsel
*evsel
;
1663 evsel
= perf_session__find_first_evtype(session
, i
);
1667 if (!(evsel
->attr
.sample_type
& PERF_SAMPLE_CPU
)) {
1668 pr_err("File does not contain CPU events. "
1669 "Remove -c option to proceed.\n");
1674 map
= cpu_map__new(cpu_list
);
1676 pr_err("Invalid cpu_list\n");
1680 for (i
= 0; i
< map
->nr
; i
++) {
1681 int cpu
= map
->map
[i
];
1683 if (cpu
>= MAX_NR_CPUS
) {
1684 pr_err("Requested CPU %d too large. "
1685 "Consider raising MAX_NR_CPUS\n", cpu
);
1689 set_bit(cpu
, cpu_bitmap
);
1695 void perf_session__fprintf_info(struct perf_session
*session
, FILE *fp
,
1701 if (session
== NULL
|| fp
== NULL
)
1704 ret
= fstat(session
->fd
, &st
);
1708 fprintf(fp
, "# ========\n");
1709 fprintf(fp
, "# captured on: %s", ctime(&st
.st_ctime
));
1710 perf_header__fprintf_info(session
, fp
, full
);
1711 fprintf(fp
, "# ========\n#\n");
1715 int __perf_session__set_tracepoints_handlers(struct perf_session
*session
,
1716 const struct perf_evsel_str_handler
*assocs
,
1719 struct perf_evlist
*evlist
= session
->evlist
;
1720 struct event_format
*format
;
1721 struct perf_evsel
*evsel
;
1722 char *tracepoint
, *name
;
1726 for (i
= 0; i
< nr_assocs
; i
++) {
1728 tracepoint
= strdup(assocs
[i
].name
);
1729 if (tracepoint
== NULL
)
1733 name
= strchr(tracepoint
, ':');
1738 format
= pevent_find_event_by_name(session
->pevent
,
1740 if (format
== NULL
) {
1742 * Adding a handler for an event not in the session,
1748 evsel
= perf_evlist__find_tracepoint_by_id(evlist
, format
->id
);
1753 if (evsel
->handler
.func
!= NULL
)
1755 evsel
->handler
.func
= assocs
[i
].handler
;