1 #include <linux/types.h>
9 #include "thread_map.h"
11 static const char *perf_event__names
[] = {
13 [PERF_RECORD_MMAP
] = "MMAP",
14 [PERF_RECORD_MMAP2
] = "MMAP2",
15 [PERF_RECORD_LOST
] = "LOST",
16 [PERF_RECORD_COMM
] = "COMM",
17 [PERF_RECORD_EXIT
] = "EXIT",
18 [PERF_RECORD_THROTTLE
] = "THROTTLE",
19 [PERF_RECORD_UNTHROTTLE
] = "UNTHROTTLE",
20 [PERF_RECORD_FORK
] = "FORK",
21 [PERF_RECORD_READ
] = "READ",
22 [PERF_RECORD_SAMPLE
] = "SAMPLE",
23 [PERF_RECORD_HEADER_ATTR
] = "ATTR",
24 [PERF_RECORD_HEADER_EVENT_TYPE
] = "EVENT_TYPE",
25 [PERF_RECORD_HEADER_TRACING_DATA
] = "TRACING_DATA",
26 [PERF_RECORD_HEADER_BUILD_ID
] = "BUILD_ID",
27 [PERF_RECORD_FINISHED_ROUND
] = "FINISHED_ROUND",
30 const char *perf_event__name(unsigned int id
)
32 if (id
>= ARRAY_SIZE(perf_event__names
))
34 if (!perf_event__names
[id
])
36 return perf_event__names
[id
];
39 static struct perf_sample synth_sample
= {
48 static pid_t
perf_event__get_comm_tgid(pid_t pid
, char *comm
, size_t len
)
50 char filename
[PATH_MAX
];
56 snprintf(filename
, sizeof(filename
), "/proc/%d/status", pid
);
58 fp
= fopen(filename
, "r");
60 pr_debug("couldn't open %s\n", filename
);
64 while (!comm
[0] || (tgid
< 0)) {
65 if (fgets(bf
, sizeof(bf
), fp
) == NULL
) {
66 pr_warning("couldn't get COMM and pgid, malformed %s\n",
71 if (memcmp(bf
, "Name:", 5) == 0) {
73 while (*name
&& isspace(*name
))
75 size
= strlen(name
) - 1;
78 memcpy(comm
, name
, size
);
81 } else if (memcmp(bf
, "Tgid:", 5) == 0) {
83 while (*tgids
&& isspace(*tgids
))
94 static pid_t
perf_event__synthesize_comm(struct perf_tool
*tool
,
95 union perf_event
*event
, pid_t pid
,
97 perf_event__handler_t process
,
98 struct machine
*machine
)
100 char filename
[PATH_MAX
];
103 struct dirent dirent
, *next
;
106 memset(&event
->comm
, 0, sizeof(event
->comm
));
108 tgid
= perf_event__get_comm_tgid(pid
, event
->comm
.comm
,
109 sizeof(event
->comm
.comm
));
113 event
->comm
.pid
= tgid
;
114 event
->comm
.header
.type
= PERF_RECORD_COMM
;
116 size
= strlen(event
->comm
.comm
) + 1;
117 size
= PERF_ALIGN(size
, sizeof(u64
));
118 memset(event
->comm
.comm
+ size
, 0, machine
->id_hdr_size
);
119 event
->comm
.header
.size
= (sizeof(event
->comm
) -
120 (sizeof(event
->comm
.comm
) - size
) +
121 machine
->id_hdr_size
);
123 event
->comm
.tid
= pid
;
125 if (process(tool
, event
, &synth_sample
, machine
) != 0)
131 snprintf(filename
, sizeof(filename
), "/proc/%d/task", pid
);
133 tasks
= opendir(filename
);
135 pr_debug("couldn't open %s\n", filename
);
139 while (!readdir_r(tasks
, &dirent
, &next
) && next
) {
141 pid
= strtol(dirent
.d_name
, &end
, 10);
145 /* already have tgid; jut want to update the comm */
146 (void) perf_event__get_comm_tgid(pid
, event
->comm
.comm
,
147 sizeof(event
->comm
.comm
));
149 size
= strlen(event
->comm
.comm
) + 1;
150 size
= PERF_ALIGN(size
, sizeof(u64
));
151 memset(event
->comm
.comm
+ size
, 0, machine
->id_hdr_size
);
152 event
->comm
.header
.size
= (sizeof(event
->comm
) -
153 (sizeof(event
->comm
.comm
) - size
) +
154 machine
->id_hdr_size
);
156 event
->comm
.tid
= pid
;
158 if (process(tool
, event
, &synth_sample
, machine
) != 0) {
169 static int perf_event__synthesize_mmap_events(struct perf_tool
*tool
,
170 union perf_event
*event
,
171 pid_t pid
, pid_t tgid
,
172 perf_event__handler_t process
,
173 struct machine
*machine
)
175 char filename
[PATH_MAX
];
179 snprintf(filename
, sizeof(filename
), "/proc/%d/maps", pid
);
181 fp
= fopen(filename
, "r");
184 * We raced with a task exiting - just return:
186 pr_debug("couldn't open %s\n", filename
);
190 event
->header
.type
= PERF_RECORD_MMAP2
;
192 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
194 event
->header
.misc
= PERF_RECORD_MISC_USER
;
199 char execname
[PATH_MAX
];
200 char anonstr
[] = "//anon";
205 if (fgets(bf
, sizeof(bf
), fp
) == NULL
)
208 /* ensure null termination since stack will be reused. */
209 strcpy(execname
, "");
211 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
212 n
= sscanf(bf
, "%"PRIx64
"-%"PRIx64
" %s %"PRIx64
" %x:%x %u %s\n",
213 &event
->mmap2
.start
, &event
->mmap2
.len
, prot
,
214 &event
->mmap2
.pgoff
, &event
->mmap2
.maj
,
218 event
->mmap2
.ino
= (u64
)ino
;
226 if (!strcmp(execname
, ""))
227 strcpy(execname
, anonstr
);
229 size
= strlen(execname
) + 1;
230 memcpy(event
->mmap2
.filename
, execname
, size
);
231 size
= PERF_ALIGN(size
, sizeof(u64
));
232 event
->mmap2
.len
-= event
->mmap
.start
;
233 event
->mmap2
.header
.size
= (sizeof(event
->mmap2
) -
234 (sizeof(event
->mmap2
.filename
) - size
));
235 memset(event
->mmap2
.filename
+ size
, 0, machine
->id_hdr_size
);
236 event
->mmap2
.header
.size
+= machine
->id_hdr_size
;
237 event
->mmap2
.pid
= tgid
;
238 event
->mmap2
.tid
= pid
;
240 if (process(tool
, event
, &synth_sample
, machine
) != 0) {
250 int perf_event__synthesize_modules(struct perf_tool
*tool
,
251 perf_event__handler_t process
,
252 struct machine
*machine
)
256 struct map_groups
*kmaps
= &machine
->kmaps
;
257 union perf_event
*event
= zalloc((sizeof(event
->mmap
) +
258 machine
->id_hdr_size
));
260 pr_debug("Not enough memory synthesizing mmap event "
261 "for kernel modules\n");
265 event
->header
.type
= PERF_RECORD_MMAP
;
268 * kernel uses 0 for user space maps, see kernel/perf_event.c
271 if (machine__is_host(machine
))
272 event
->header
.misc
= PERF_RECORD_MISC_KERNEL
;
274 event
->header
.misc
= PERF_RECORD_MISC_GUEST_KERNEL
;
276 for (nd
= rb_first(&kmaps
->maps
[MAP__FUNCTION
]);
277 nd
; nd
= rb_next(nd
)) {
279 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
);
281 if (pos
->dso
->kernel
)
284 size
= PERF_ALIGN(pos
->dso
->long_name_len
+ 1, sizeof(u64
));
285 event
->mmap
.header
.type
= PERF_RECORD_MMAP
;
286 event
->mmap
.header
.size
= (sizeof(event
->mmap
) -
287 (sizeof(event
->mmap
.filename
) - size
));
288 memset(event
->mmap
.filename
+ size
, 0, machine
->id_hdr_size
);
289 event
->mmap
.header
.size
+= machine
->id_hdr_size
;
290 event
->mmap
.start
= pos
->start
;
291 event
->mmap
.len
= pos
->end
- pos
->start
;
292 event
->mmap
.pid
= machine
->pid
;
294 memcpy(event
->mmap
.filename
, pos
->dso
->long_name
,
295 pos
->dso
->long_name_len
+ 1);
296 if (process(tool
, event
, &synth_sample
, machine
) != 0) {
306 static int __event__synthesize_thread(union perf_event
*comm_event
,
307 union perf_event
*mmap_event
,
309 perf_event__handler_t process
,
310 struct perf_tool
*tool
,
311 struct machine
*machine
)
313 pid_t tgid
= perf_event__synthesize_comm(tool
, comm_event
, pid
, full
,
317 return perf_event__synthesize_mmap_events(tool
, mmap_event
, pid
, tgid
,
321 int perf_event__synthesize_thread_map(struct perf_tool
*tool
,
322 struct thread_map
*threads
,
323 perf_event__handler_t process
,
324 struct machine
*machine
)
326 union perf_event
*comm_event
, *mmap_event
;
327 int err
= -1, thread
, j
;
329 comm_event
= malloc(sizeof(comm_event
->comm
) + machine
->id_hdr_size
);
330 if (comm_event
== NULL
)
333 mmap_event
= malloc(sizeof(mmap_event
->mmap
) + machine
->id_hdr_size
);
334 if (mmap_event
== NULL
)
338 for (thread
= 0; thread
< threads
->nr
; ++thread
) {
339 if (__event__synthesize_thread(comm_event
, mmap_event
,
340 threads
->map
[thread
], 0,
341 process
, tool
, machine
)) {
347 * comm.pid is set to thread group id by
348 * perf_event__synthesize_comm
350 if ((int) comm_event
->comm
.pid
!= threads
->map
[thread
]) {
351 bool need_leader
= true;
353 /* is thread group leader in thread_map? */
354 for (j
= 0; j
< threads
->nr
; ++j
) {
355 if ((int) comm_event
->comm
.pid
== threads
->map
[j
]) {
361 /* if not, generate events for it */
363 __event__synthesize_thread(comm_event
,
365 comm_event
->comm
.pid
, 0,
366 process
, tool
, machine
)) {
379 int perf_event__synthesize_threads(struct perf_tool
*tool
,
380 perf_event__handler_t process
,
381 struct machine
*machine
)
384 struct dirent dirent
, *next
;
385 union perf_event
*comm_event
, *mmap_event
;
388 comm_event
= malloc(sizeof(comm_event
->comm
) + machine
->id_hdr_size
);
389 if (comm_event
== NULL
)
392 mmap_event
= malloc(sizeof(mmap_event
->mmap
) + machine
->id_hdr_size
);
393 if (mmap_event
== NULL
)
396 proc
= opendir("/proc");
400 while (!readdir_r(proc
, &dirent
, &next
) && next
) {
402 pid_t pid
= strtol(dirent
.d_name
, &end
, 10);
404 if (*end
) /* only interested in proper numerical dirents */
407 * We may race with exiting thread, so don't stop just because
408 * one thread couldn't be synthesized.
410 __event__synthesize_thread(comm_event
, mmap_event
, pid
, 1,
411 process
, tool
, machine
);
424 struct process_symbol_args
{
429 static int find_symbol_cb(void *arg
, const char *name
, char type
,
432 struct process_symbol_args
*args
= arg
;
435 * Must be a function or at least an alias, as in PARISC64, where "_text" is
436 * an 'A' to the same address as "_stext".
438 if (!(symbol_type__is_a(type
, MAP__FUNCTION
) ||
439 type
== 'A') || strcmp(name
, args
->name
))
446 int perf_event__synthesize_kernel_mmap(struct perf_tool
*tool
,
447 perf_event__handler_t process
,
448 struct machine
*machine
,
449 const char *symbol_name
)
452 const char *filename
, *mmap_name
;
454 char name_buff
[PATH_MAX
];
458 * We should get this from /sys/kernel/sections/.text, but till that is
459 * available use this, and after it is use this as a fallback for older
462 struct process_symbol_args args
= { .name
= symbol_name
, };
463 union perf_event
*event
= zalloc((sizeof(event
->mmap
) +
464 machine
->id_hdr_size
));
466 pr_debug("Not enough memory synthesizing mmap event "
467 "for kernel modules\n");
471 mmap_name
= machine__mmap_name(machine
, name_buff
, sizeof(name_buff
));
472 if (machine__is_host(machine
)) {
474 * kernel uses PERF_RECORD_MISC_USER for user space maps,
475 * see kernel/perf_event.c __perf_event_mmap
477 event
->header
.misc
= PERF_RECORD_MISC_KERNEL
;
478 filename
= "/proc/kallsyms";
480 event
->header
.misc
= PERF_RECORD_MISC_GUEST_KERNEL
;
481 if (machine__is_default_guest(machine
))
482 filename
= (char *) symbol_conf
.default_guest_kallsyms
;
484 sprintf(path
, "%s/proc/kallsyms", machine
->root_dir
);
489 if (kallsyms__parse(filename
, &args
, find_symbol_cb
) <= 0) {
494 map
= machine
->vmlinux_maps
[MAP__FUNCTION
];
495 size
= snprintf(event
->mmap
.filename
, sizeof(event
->mmap
.filename
),
496 "%s%s", mmap_name
, symbol_name
) + 1;
497 size
= PERF_ALIGN(size
, sizeof(u64
));
498 event
->mmap
.header
.type
= PERF_RECORD_MMAP
;
499 event
->mmap
.header
.size
= (sizeof(event
->mmap
) -
500 (sizeof(event
->mmap
.filename
) - size
) + machine
->id_hdr_size
);
501 event
->mmap
.pgoff
= args
.start
;
502 event
->mmap
.start
= map
->start
;
503 event
->mmap
.len
= map
->end
- event
->mmap
.start
;
504 event
->mmap
.pid
= machine
->pid
;
506 err
= process(tool
, event
, &synth_sample
, machine
);
512 size_t perf_event__fprintf_comm(union perf_event
*event
, FILE *fp
)
514 return fprintf(fp
, ": %s:%d\n", event
->comm
.comm
, event
->comm
.tid
);
517 int perf_event__process_comm(struct perf_tool
*tool __maybe_unused
,
518 union perf_event
*event
,
519 struct perf_sample
*sample __maybe_unused
,
520 struct machine
*machine
)
522 return machine__process_comm_event(machine
, event
);
525 int perf_event__process_lost(struct perf_tool
*tool __maybe_unused
,
526 union perf_event
*event
,
527 struct perf_sample
*sample __maybe_unused
,
528 struct machine
*machine
)
530 return machine__process_lost_event(machine
, event
);
533 size_t perf_event__fprintf_mmap(union perf_event
*event
, FILE *fp
)
535 return fprintf(fp
, " %d/%d: [%#" PRIx64
"(%#" PRIx64
") @ %#" PRIx64
"]: %s\n",
536 event
->mmap
.pid
, event
->mmap
.tid
, event
->mmap
.start
,
537 event
->mmap
.len
, event
->mmap
.pgoff
, event
->mmap
.filename
);
540 size_t perf_event__fprintf_mmap2(union perf_event
*event
, FILE *fp
)
542 return fprintf(fp
, " %d/%d: [%#" PRIx64
"(%#" PRIx64
") @ %#" PRIx64
543 " %02x:%02x %"PRIu64
" %"PRIu64
"]: %s\n",
544 event
->mmap2
.pid
, event
->mmap2
.tid
, event
->mmap2
.start
,
545 event
->mmap2
.len
, event
->mmap2
.pgoff
, event
->mmap2
.maj
,
546 event
->mmap2
.min
, event
->mmap2
.ino
,
547 event
->mmap2
.ino_generation
,
548 event
->mmap2
.filename
);
551 int perf_event__process_mmap(struct perf_tool
*tool __maybe_unused
,
552 union perf_event
*event
,
553 struct perf_sample
*sample __maybe_unused
,
554 struct machine
*machine
)
556 return machine__process_mmap_event(machine
, event
);
559 int perf_event__process_mmap2(struct perf_tool
*tool __maybe_unused
,
560 union perf_event
*event
,
561 struct perf_sample
*sample __maybe_unused
,
562 struct machine
*machine
)
564 return machine__process_mmap2_event(machine
, event
);
567 size_t perf_event__fprintf_task(union perf_event
*event
, FILE *fp
)
569 return fprintf(fp
, "(%d:%d):(%d:%d)\n",
570 event
->fork
.pid
, event
->fork
.tid
,
571 event
->fork
.ppid
, event
->fork
.ptid
);
574 int perf_event__process_fork(struct perf_tool
*tool __maybe_unused
,
575 union perf_event
*event
,
576 struct perf_sample
*sample __maybe_unused
,
577 struct machine
*machine
)
579 return machine__process_fork_event(machine
, event
);
582 int perf_event__process_exit(struct perf_tool
*tool __maybe_unused
,
583 union perf_event
*event
,
584 struct perf_sample
*sample __maybe_unused
,
585 struct machine
*machine
)
587 return machine__process_exit_event(machine
, event
);
590 size_t perf_event__fprintf(union perf_event
*event
, FILE *fp
)
592 size_t ret
= fprintf(fp
, "PERF_RECORD_%s",
593 perf_event__name(event
->header
.type
));
595 switch (event
->header
.type
) {
596 case PERF_RECORD_COMM
:
597 ret
+= perf_event__fprintf_comm(event
, fp
);
599 case PERF_RECORD_FORK
:
600 case PERF_RECORD_EXIT
:
601 ret
+= perf_event__fprintf_task(event
, fp
);
603 case PERF_RECORD_MMAP
:
604 ret
+= perf_event__fprintf_mmap(event
, fp
);
606 case PERF_RECORD_MMAP2
:
607 ret
+= perf_event__fprintf_mmap2(event
, fp
);
610 ret
+= fprintf(fp
, "\n");
616 int perf_event__process(struct perf_tool
*tool __maybe_unused
,
617 union perf_event
*event
,
618 struct perf_sample
*sample __maybe_unused
,
619 struct machine
*machine
)
621 return machine__process_event(machine
, event
);
624 void thread__find_addr_map(struct thread
*self
,
625 struct machine
*machine
, u8 cpumode
,
626 enum map_type type
, u64 addr
,
627 struct addr_location
*al
)
629 struct map_groups
*mg
= &self
->mg
;
630 bool load_map
= false;
634 al
->cpumode
= cpumode
;
635 al
->filtered
= false;
637 if (machine
== NULL
) {
642 if (cpumode
== PERF_RECORD_MISC_KERNEL
&& perf_host
) {
644 mg
= &machine
->kmaps
;
646 } else if (cpumode
== PERF_RECORD_MISC_USER
&& perf_host
) {
648 } else if (cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
&& perf_guest
) {
650 mg
= &machine
->kmaps
;
654 * 'u' means guest os user space.
655 * TODO: We don't support guest user space. Might support late.
657 if (cpumode
== PERF_RECORD_MISC_GUEST_USER
&& perf_guest
)
663 if ((cpumode
== PERF_RECORD_MISC_GUEST_USER
||
664 cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
) &&
667 if ((cpumode
== PERF_RECORD_MISC_USER
||
668 cpumode
== PERF_RECORD_MISC_KERNEL
) &&
675 al
->map
= map_groups__find(mg
, type
, al
->addr
);
676 if (al
->map
== NULL
) {
678 * If this is outside of all known maps, and is a negative
679 * address, try to look it up in the kernel dso, as it might be
680 * a vsyscall or vdso (which executes in user-mode).
682 * XXX This is nasty, we should have a symbol list in the
683 * "[vdso]" dso, but for now lets use the old trick of looking
684 * in the whole kernel symbol list.
686 if ((long long)al
->addr
< 0 &&
687 cpumode
== PERF_RECORD_MISC_USER
&&
688 machine
&& mg
!= &machine
->kmaps
) {
689 mg
= &machine
->kmaps
;
694 * Kernel maps might be changed when loading symbols so loading
695 * must be done prior to using kernel maps.
698 map__load(al
->map
, machine
->symbol_filter
);
699 al
->addr
= al
->map
->map_ip(al
->map
, al
->addr
);
703 void thread__find_addr_location(struct thread
*thread
, struct machine
*machine
,
704 u8 cpumode
, enum map_type type
, u64 addr
,
705 struct addr_location
*al
)
707 thread__find_addr_map(thread
, machine
, cpumode
, type
, addr
, al
);
709 al
->sym
= map__find_symbol(al
->map
, al
->addr
,
710 machine
->symbol_filter
);
715 int perf_event__preprocess_sample(const union perf_event
*event
,
716 struct machine
*machine
,
717 struct addr_location
*al
,
718 struct perf_sample
*sample
)
720 u8 cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
721 struct thread
*thread
= machine__findnew_thread(machine
, sample
->pid
,
727 if (symbol_conf
.comm_list
&&
728 !strlist__has_entry(symbol_conf
.comm_list
, thread
->comm
))
731 dump_printf(" ... thread: %s:%d\n", thread
->comm
, thread
->tid
);
733 * Have we already created the kernel maps for this machine?
735 * This should have happened earlier, when we processed the kernel MMAP
736 * events, but for older perf.data files there was no such thing, so do
739 if (cpumode
== PERF_RECORD_MISC_KERNEL
&&
740 machine
->vmlinux_maps
[MAP__FUNCTION
] == NULL
)
741 machine__create_kernel_maps(machine
);
743 thread__find_addr_map(thread
, machine
, cpumode
, MAP__FUNCTION
,
745 dump_printf(" ...... dso: %s\n",
746 al
->map
? al
->map
->dso
->long_name
:
747 al
->level
== 'H' ? "[hypervisor]" : "<not found>");
749 al
->cpu
= sample
->cpu
;
752 struct dso
*dso
= al
->map
->dso
;
754 if (symbol_conf
.dso_list
&&
755 (!dso
|| !(strlist__has_entry(symbol_conf
.dso_list
,
757 (dso
->short_name
!= dso
->long_name
&&
758 strlist__has_entry(symbol_conf
.dso_list
,
762 al
->sym
= map__find_symbol(al
->map
, al
->addr
,
763 machine
->symbol_filter
);
766 if (symbol_conf
.sym_list
&&
767 (!al
->sym
|| !strlist__has_entry(symbol_conf
.sym_list
,