4 #include <linux/kernel.h>
5 #include <linux/types.h>
9 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
10 #include <api/fs/fs.h>
11 #include <linux/perf_event.h>
20 #include "thread_map.h"
21 #include "sane_ctype.h"
22 #include "symbol/kallsyms.h"
26 static const char *perf_event__names
[] = {
28 [PERF_RECORD_MMAP
] = "MMAP",
29 [PERF_RECORD_MMAP2
] = "MMAP2",
30 [PERF_RECORD_LOST
] = "LOST",
31 [PERF_RECORD_COMM
] = "COMM",
32 [PERF_RECORD_EXIT
] = "EXIT",
33 [PERF_RECORD_THROTTLE
] = "THROTTLE",
34 [PERF_RECORD_UNTHROTTLE
] = "UNTHROTTLE",
35 [PERF_RECORD_FORK
] = "FORK",
36 [PERF_RECORD_READ
] = "READ",
37 [PERF_RECORD_SAMPLE
] = "SAMPLE",
38 [PERF_RECORD_AUX
] = "AUX",
39 [PERF_RECORD_ITRACE_START
] = "ITRACE_START",
40 [PERF_RECORD_LOST_SAMPLES
] = "LOST_SAMPLES",
41 [PERF_RECORD_SWITCH
] = "SWITCH",
42 [PERF_RECORD_SWITCH_CPU_WIDE
] = "SWITCH_CPU_WIDE",
43 [PERF_RECORD_NAMESPACES
] = "NAMESPACES",
44 [PERF_RECORD_HEADER_ATTR
] = "ATTR",
45 [PERF_RECORD_HEADER_EVENT_TYPE
] = "EVENT_TYPE",
46 [PERF_RECORD_HEADER_TRACING_DATA
] = "TRACING_DATA",
47 [PERF_RECORD_HEADER_BUILD_ID
] = "BUILD_ID",
48 [PERF_RECORD_FINISHED_ROUND
] = "FINISHED_ROUND",
49 [PERF_RECORD_ID_INDEX
] = "ID_INDEX",
50 [PERF_RECORD_AUXTRACE_INFO
] = "AUXTRACE_INFO",
51 [PERF_RECORD_AUXTRACE
] = "AUXTRACE",
52 [PERF_RECORD_AUXTRACE_ERROR
] = "AUXTRACE_ERROR",
53 [PERF_RECORD_THREAD_MAP
] = "THREAD_MAP",
54 [PERF_RECORD_CPU_MAP
] = "CPU_MAP",
55 [PERF_RECORD_STAT_CONFIG
] = "STAT_CONFIG",
56 [PERF_RECORD_STAT
] = "STAT",
57 [PERF_RECORD_STAT_ROUND
] = "STAT_ROUND",
58 [PERF_RECORD_EVENT_UPDATE
] = "EVENT_UPDATE",
59 [PERF_RECORD_TIME_CONV
] = "TIME_CONV",
62 static const char *perf_ns__names
[] = {
63 [NET_NS_INDEX
] = "net",
64 [UTS_NS_INDEX
] = "uts",
65 [IPC_NS_INDEX
] = "ipc",
66 [PID_NS_INDEX
] = "pid",
67 [USER_NS_INDEX
] = "user",
68 [MNT_NS_INDEX
] = "mnt",
69 [CGROUP_NS_INDEX
] = "cgroup",
72 const char *perf_event__name(unsigned int id
)
74 if (id
>= ARRAY_SIZE(perf_event__names
))
76 if (!perf_event__names
[id
])
78 return perf_event__names
[id
];
81 static const char *perf_ns__name(unsigned int id
)
83 if (id
>= ARRAY_SIZE(perf_ns__names
))
85 return perf_ns__names
[id
];
88 static int perf_tool__process_synth_event(struct perf_tool
*tool
,
89 union perf_event
*event
,
90 struct machine
*machine
,
91 perf_event__handler_t process
)
93 struct perf_sample synth_sample
= {
100 .cpumode
= event
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
,
103 return process(tool
, event
, &synth_sample
, machine
);
107 * Assumes that the first 4095 bytes of /proc/pid/stat contains
108 * the comm, tgid and ppid.
110 static int perf_event__get_comm_ids(pid_t pid
, char *comm
, size_t len
,
111 pid_t
*tgid
, pid_t
*ppid
)
113 char filename
[PATH_MAX
];
118 char *name
, *tgids
, *ppids
;
123 snprintf(filename
, sizeof(filename
), "/proc/%d/status", pid
);
125 fd
= open(filename
, O_RDONLY
);
127 pr_debug("couldn't open %s\n", filename
);
131 n
= read(fd
, bf
, sizeof(bf
) - 1);
134 pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n",
140 name
= strstr(bf
, "Name:");
141 tgids
= strstr(bf
, "Tgid:");
142 ppids
= strstr(bf
, "PPid:");
147 name
+= 5; /* strlen("Name:") */
150 nl
= strchr(name
, '\n');
157 memcpy(comm
, name
, size
);
160 pr_debug("Name: string not found for pid %d\n", pid
);
164 tgids
+= 5; /* strlen("Tgid:") */
167 pr_debug("Tgid: string not found for pid %d\n", pid
);
171 ppids
+= 5; /* strlen("PPid:") */
174 pr_debug("PPid: string not found for pid %d\n", pid
);
180 static int perf_event__prepare_comm(union perf_event
*event
, pid_t pid
,
181 struct machine
*machine
,
182 pid_t
*tgid
, pid_t
*ppid
)
188 memset(&event
->comm
, 0, sizeof(event
->comm
));
190 if (machine__is_host(machine
)) {
191 if (perf_event__get_comm_ids(pid
, event
->comm
.comm
,
192 sizeof(event
->comm
.comm
),
197 *tgid
= machine
->pid
;
203 event
->comm
.pid
= *tgid
;
204 event
->comm
.header
.type
= PERF_RECORD_COMM
;
206 size
= strlen(event
->comm
.comm
) + 1;
207 size
= PERF_ALIGN(size
, sizeof(u64
));
208 memset(event
->comm
.comm
+ size
, 0, machine
->id_hdr_size
);
209 event
->comm
.header
.size
= (sizeof(event
->comm
) -
210 (sizeof(event
->comm
.comm
) - size
) +
211 machine
->id_hdr_size
);
212 event
->comm
.tid
= pid
;
217 pid_t
perf_event__synthesize_comm(struct perf_tool
*tool
,
218 union perf_event
*event
, pid_t pid
,
219 perf_event__handler_t process
,
220 struct machine
*machine
)
224 if (perf_event__prepare_comm(event
, pid
, machine
, &tgid
, &ppid
) != 0)
227 if (perf_tool__process_synth_event(tool
, event
, machine
, process
) != 0)
233 static void perf_event__get_ns_link_info(pid_t pid
, const char *ns
,
234 struct perf_ns_link_info
*ns_link_info
)
239 sprintf(proc_ns
, "/proc/%u/ns/%s", pid
, ns
);
240 if (stat64(proc_ns
, &st
) == 0) {
241 ns_link_info
->dev
= st
.st_dev
;
242 ns_link_info
->ino
= st
.st_ino
;
246 int perf_event__synthesize_namespaces(struct perf_tool
*tool
,
247 union perf_event
*event
,
248 pid_t pid
, pid_t tgid
,
249 perf_event__handler_t process
,
250 struct machine
*machine
)
253 struct perf_ns_link_info
*ns_link_info
;
255 if (!tool
|| !tool
->namespace_events
)
258 memset(&event
->namespaces
, 0, (sizeof(event
->namespaces
) +
259 (NR_NAMESPACES
* sizeof(struct perf_ns_link_info
)) +
260 machine
->id_hdr_size
));
262 event
->namespaces
.pid
= tgid
;
263 event
->namespaces
.tid
= pid
;
265 event
->namespaces
.nr_namespaces
= NR_NAMESPACES
;
267 ns_link_info
= event
->namespaces
.link_info
;
269 for (idx
= 0; idx
< event
->namespaces
.nr_namespaces
; idx
++)
270 perf_event__get_ns_link_info(pid
, perf_ns__name(idx
),
273 event
->namespaces
.header
.type
= PERF_RECORD_NAMESPACES
;
275 event
->namespaces
.header
.size
= (sizeof(event
->namespaces
) +
276 (NR_NAMESPACES
* sizeof(struct perf_ns_link_info
)) +
277 machine
->id_hdr_size
);
279 if (perf_tool__process_synth_event(tool
, event
, machine
, process
) != 0)
285 static int perf_event__synthesize_fork(struct perf_tool
*tool
,
286 union perf_event
*event
,
287 pid_t pid
, pid_t tgid
, pid_t ppid
,
288 perf_event__handler_t process
,
289 struct machine
*machine
)
291 memset(&event
->fork
, 0, sizeof(event
->fork
) + machine
->id_hdr_size
);
294 * for main thread set parent to ppid from status file. For other
295 * threads set parent pid to main thread. ie., assume main thread
296 * spawns all threads in a process
299 event
->fork
.ppid
= ppid
;
300 event
->fork
.ptid
= ppid
;
302 event
->fork
.ppid
= tgid
;
303 event
->fork
.ptid
= tgid
;
305 event
->fork
.pid
= tgid
;
306 event
->fork
.tid
= pid
;
307 event
->fork
.header
.type
= PERF_RECORD_FORK
;
309 event
->fork
.header
.size
= (sizeof(event
->fork
) + machine
->id_hdr_size
);
311 if (perf_tool__process_synth_event(tool
, event
, machine
, process
) != 0)
317 int perf_event__synthesize_mmap_events(struct perf_tool
*tool
,
318 union perf_event
*event
,
319 pid_t pid
, pid_t tgid
,
320 perf_event__handler_t process
,
321 struct machine
*machine
,
323 unsigned int proc_map_timeout
)
325 char filename
[PATH_MAX
];
327 unsigned long long t
;
328 bool truncation
= false;
329 unsigned long long timeout
= proc_map_timeout
* 1000000ULL;
331 const char *hugetlbfs_mnt
= hugetlbfs__mountpoint();
332 int hugetlbfs_mnt_len
= hugetlbfs_mnt
? strlen(hugetlbfs_mnt
) : 0;
334 if (machine__is_default_guest(machine
))
337 snprintf(filename
, sizeof(filename
), "%s/proc/%d/task/%d/maps",
338 machine
->root_dir
, pid
, pid
);
340 fp
= fopen(filename
, "r");
343 * We raced with a task exiting - just return:
345 pr_debug("couldn't open %s\n", filename
);
349 event
->header
.type
= PERF_RECORD_MMAP2
;
355 char execname
[PATH_MAX
];
356 char anonstr
[] = "//anon";
361 if (fgets(bf
, sizeof(bf
), fp
) == NULL
)
364 if ((rdclock() - t
) > timeout
) {
365 pr_warning("Reading %s time out. "
366 "You may want to increase "
367 "the time limit by --proc-map-timeout\n",
373 /* ensure null termination since stack will be reused. */
374 strcpy(execname
, "");
376 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
377 n
= sscanf(bf
, "%"PRIx64
"-%"PRIx64
" %s %"PRIx64
" %x:%x %u %[^\n]\n",
378 &event
->mmap2
.start
, &event
->mmap2
.len
, prot
,
379 &event
->mmap2
.pgoff
, &event
->mmap2
.maj
,
384 * Anon maps don't have the execname.
389 event
->mmap2
.ino
= (u64
)ino
;
392 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c
394 if (machine__is_host(machine
))
395 event
->header
.misc
= PERF_RECORD_MISC_USER
;
397 event
->header
.misc
= PERF_RECORD_MISC_GUEST_USER
;
399 /* map protection and flags bits */
400 event
->mmap2
.prot
= 0;
401 event
->mmap2
.flags
= 0;
403 event
->mmap2
.prot
|= PROT_READ
;
405 event
->mmap2
.prot
|= PROT_WRITE
;
407 event
->mmap2
.prot
|= PROT_EXEC
;
410 event
->mmap2
.flags
|= MAP_SHARED
;
412 event
->mmap2
.flags
|= MAP_PRIVATE
;
414 if (prot
[2] != 'x') {
415 if (!mmap_data
|| prot
[0] != 'r')
418 event
->header
.misc
|= PERF_RECORD_MISC_MMAP_DATA
;
423 event
->header
.misc
|= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT
;
425 if (!strcmp(execname
, ""))
426 strcpy(execname
, anonstr
);
428 if (hugetlbfs_mnt_len
&&
429 !strncmp(execname
, hugetlbfs_mnt
, hugetlbfs_mnt_len
)) {
430 strcpy(execname
, anonstr
);
431 event
->mmap2
.flags
|= MAP_HUGETLB
;
434 size
= strlen(execname
) + 1;
435 memcpy(event
->mmap2
.filename
, execname
, size
);
436 size
= PERF_ALIGN(size
, sizeof(u64
));
437 event
->mmap2
.len
-= event
->mmap
.start
;
438 event
->mmap2
.header
.size
= (sizeof(event
->mmap2
) -
439 (sizeof(event
->mmap2
.filename
) - size
));
440 memset(event
->mmap2
.filename
+ size
, 0, machine
->id_hdr_size
);
441 event
->mmap2
.header
.size
+= machine
->id_hdr_size
;
442 event
->mmap2
.pid
= tgid
;
443 event
->mmap2
.tid
= pid
;
445 if (perf_tool__process_synth_event(tool
, event
, machine
, process
) != 0) {
458 int perf_event__synthesize_modules(struct perf_tool
*tool
,
459 perf_event__handler_t process
,
460 struct machine
*machine
)
464 struct map_groups
*kmaps
= &machine
->kmaps
;
465 struct maps
*maps
= &kmaps
->maps
[MAP__FUNCTION
];
466 union perf_event
*event
= zalloc((sizeof(event
->mmap
) +
467 machine
->id_hdr_size
));
469 pr_debug("Not enough memory synthesizing mmap event "
470 "for kernel modules\n");
474 event
->header
.type
= PERF_RECORD_MMAP
;
477 * kernel uses 0 for user space maps, see kernel/perf_event.c
480 if (machine__is_host(machine
))
481 event
->header
.misc
= PERF_RECORD_MISC_KERNEL
;
483 event
->header
.misc
= PERF_RECORD_MISC_GUEST_KERNEL
;
485 for (pos
= maps__first(maps
); pos
; pos
= map__next(pos
)) {
488 if (__map__is_kernel(pos
))
491 size
= PERF_ALIGN(pos
->dso
->long_name_len
+ 1, sizeof(u64
));
492 event
->mmap
.header
.type
= PERF_RECORD_MMAP
;
493 event
->mmap
.header
.size
= (sizeof(event
->mmap
) -
494 (sizeof(event
->mmap
.filename
) - size
));
495 memset(event
->mmap
.filename
+ size
, 0, machine
->id_hdr_size
);
496 event
->mmap
.header
.size
+= machine
->id_hdr_size
;
497 event
->mmap
.start
= pos
->start
;
498 event
->mmap
.len
= pos
->end
- pos
->start
;
499 event
->mmap
.pid
= machine
->pid
;
501 memcpy(event
->mmap
.filename
, pos
->dso
->long_name
,
502 pos
->dso
->long_name_len
+ 1);
503 if (perf_tool__process_synth_event(tool
, event
, machine
, process
) != 0) {
513 static int __event__synthesize_thread(union perf_event
*comm_event
,
514 union perf_event
*mmap_event
,
515 union perf_event
*fork_event
,
516 union perf_event
*namespaces_event
,
518 perf_event__handler_t process
,
519 struct perf_tool
*tool
,
520 struct machine
*machine
,
522 unsigned int proc_map_timeout
)
524 char filename
[PATH_MAX
];
526 struct dirent
*dirent
;
530 /* special case: only send one comm event using passed in pid */
532 tgid
= perf_event__synthesize_comm(tool
, comm_event
, pid
,
538 if (perf_event__synthesize_namespaces(tool
, namespaces_event
, pid
,
539 tgid
, process
, machine
) < 0)
543 return perf_event__synthesize_mmap_events(tool
, mmap_event
, pid
, tgid
,
544 process
, machine
, mmap_data
,
548 if (machine__is_default_guest(machine
))
551 snprintf(filename
, sizeof(filename
), "%s/proc/%d/task",
552 machine
->root_dir
, pid
);
554 tasks
= opendir(filename
);
556 pr_debug("couldn't open %s\n", filename
);
560 while ((dirent
= readdir(tasks
)) != NULL
) {
564 _pid
= strtol(dirent
->d_name
, &end
, 10);
569 if (perf_event__prepare_comm(comm_event
, _pid
, machine
,
573 if (perf_event__synthesize_fork(tool
, fork_event
, _pid
, tgid
,
574 ppid
, process
, machine
) < 0)
577 if (perf_event__synthesize_namespaces(tool
, namespaces_event
, _pid
,
578 tgid
, process
, machine
) < 0)
582 * Send the prepared comm event
584 if (perf_tool__process_synth_event(tool
, comm_event
, machine
, process
) != 0)
589 /* process the parent's maps too */
590 rc
= perf_event__synthesize_mmap_events(tool
, mmap_event
, pid
, tgid
,
591 process
, machine
, mmap_data
, proc_map_timeout
);
601 int perf_event__synthesize_thread_map(struct perf_tool
*tool
,
602 struct thread_map
*threads
,
603 perf_event__handler_t process
,
604 struct machine
*machine
,
606 unsigned int proc_map_timeout
)
608 union perf_event
*comm_event
, *mmap_event
, *fork_event
;
609 union perf_event
*namespaces_event
;
610 int err
= -1, thread
, j
;
612 comm_event
= malloc(sizeof(comm_event
->comm
) + machine
->id_hdr_size
);
613 if (comm_event
== NULL
)
616 mmap_event
= malloc(sizeof(mmap_event
->mmap2
) + machine
->id_hdr_size
);
617 if (mmap_event
== NULL
)
620 fork_event
= malloc(sizeof(fork_event
->fork
) + machine
->id_hdr_size
);
621 if (fork_event
== NULL
)
624 namespaces_event
= malloc(sizeof(namespaces_event
->namespaces
) +
625 (NR_NAMESPACES
* sizeof(struct perf_ns_link_info
)) +
626 machine
->id_hdr_size
);
627 if (namespaces_event
== NULL
)
631 for (thread
= 0; thread
< threads
->nr
; ++thread
) {
632 if (__event__synthesize_thread(comm_event
, mmap_event
,
633 fork_event
, namespaces_event
,
634 thread_map__pid(threads
, thread
), 0,
635 process
, tool
, machine
,
636 mmap_data
, proc_map_timeout
)) {
642 * comm.pid is set to thread group id by
643 * perf_event__synthesize_comm
645 if ((int) comm_event
->comm
.pid
!= thread_map__pid(threads
, thread
)) {
646 bool need_leader
= true;
648 /* is thread group leader in thread_map? */
649 for (j
= 0; j
< threads
->nr
; ++j
) {
650 if ((int) comm_event
->comm
.pid
== thread_map__pid(threads
, j
)) {
656 /* if not, generate events for it */
658 __event__synthesize_thread(comm_event
, mmap_event
,
659 fork_event
, namespaces_event
,
660 comm_event
->comm
.pid
, 0,
661 process
, tool
, machine
,
662 mmap_data
, proc_map_timeout
)) {
668 free(namespaces_event
);
679 int perf_event__synthesize_threads(struct perf_tool
*tool
,
680 perf_event__handler_t process
,
681 struct machine
*machine
,
683 unsigned int proc_map_timeout
)
686 char proc_path
[PATH_MAX
];
687 struct dirent
*dirent
;
688 union perf_event
*comm_event
, *mmap_event
, *fork_event
;
689 union perf_event
*namespaces_event
;
692 if (machine__is_default_guest(machine
))
695 comm_event
= malloc(sizeof(comm_event
->comm
) + machine
->id_hdr_size
);
696 if (comm_event
== NULL
)
699 mmap_event
= malloc(sizeof(mmap_event
->mmap2
) + machine
->id_hdr_size
);
700 if (mmap_event
== NULL
)
703 fork_event
= malloc(sizeof(fork_event
->fork
) + machine
->id_hdr_size
);
704 if (fork_event
== NULL
)
707 namespaces_event
= malloc(sizeof(namespaces_event
->namespaces
) +
708 (NR_NAMESPACES
* sizeof(struct perf_ns_link_info
)) +
709 machine
->id_hdr_size
);
710 if (namespaces_event
== NULL
)
713 snprintf(proc_path
, sizeof(proc_path
), "%s/proc", machine
->root_dir
);
714 proc
= opendir(proc_path
);
717 goto out_free_namespaces
;
719 while ((dirent
= readdir(proc
)) != NULL
) {
721 pid_t pid
= strtol(dirent
->d_name
, &end
, 10);
723 if (*end
) /* only interested in proper numerical dirents */
726 * We may race with exiting thread, so don't stop just because
727 * one thread couldn't be synthesized.
729 __event__synthesize_thread(comm_event
, mmap_event
, fork_event
,
730 namespaces_event
, pid
, 1, process
,
731 tool
, machine
, mmap_data
,
738 free(namespaces_event
);
749 struct process_symbol_args
{
754 static int find_symbol_cb(void *arg
, const char *name
, char type
,
757 struct process_symbol_args
*args
= arg
;
760 * Must be a function or at least an alias, as in PARISC64, where "_text" is
761 * an 'A' to the same address as "_stext".
763 if (!(symbol_type__is_a(type
, MAP__FUNCTION
) ||
764 type
== 'A') || strcmp(name
, args
->name
))
771 int kallsyms__get_function_start(const char *kallsyms_filename
,
772 const char *symbol_name
, u64
*addr
)
774 struct process_symbol_args args
= { .name
= symbol_name
, };
776 if (kallsyms__parse(kallsyms_filename
, &args
, find_symbol_cb
) <= 0)
783 int perf_event__synthesize_kernel_mmap(struct perf_tool
*tool
,
784 perf_event__handler_t process
,
785 struct machine
*machine
)
788 const char *mmap_name
;
789 char name_buff
[PATH_MAX
];
790 struct map
*map
= machine__kernel_map(machine
);
793 union perf_event
*event
;
795 if (symbol_conf
.kptr_restrict
)
801 * We should get this from /sys/kernel/sections/.text, but till that is
802 * available use this, and after it is use this as a fallback for older
805 event
= zalloc((sizeof(event
->mmap
) + machine
->id_hdr_size
));
807 pr_debug("Not enough memory synthesizing mmap event "
808 "for kernel modules\n");
812 mmap_name
= machine__mmap_name(machine
, name_buff
, sizeof(name_buff
));
813 if (machine__is_host(machine
)) {
815 * kernel uses PERF_RECORD_MISC_USER for user space maps,
816 * see kernel/perf_event.c __perf_event_mmap
818 event
->header
.misc
= PERF_RECORD_MISC_KERNEL
;
820 event
->header
.misc
= PERF_RECORD_MISC_GUEST_KERNEL
;
823 kmap
= map__kmap(map
);
824 size
= snprintf(event
->mmap
.filename
, sizeof(event
->mmap
.filename
),
825 "%s%s", mmap_name
, kmap
->ref_reloc_sym
->name
) + 1;
826 size
= PERF_ALIGN(size
, sizeof(u64
));
827 event
->mmap
.header
.type
= PERF_RECORD_MMAP
;
828 event
->mmap
.header
.size
= (sizeof(event
->mmap
) -
829 (sizeof(event
->mmap
.filename
) - size
) + machine
->id_hdr_size
);
830 event
->mmap
.pgoff
= kmap
->ref_reloc_sym
->addr
;
831 event
->mmap
.start
= map
->start
;
832 event
->mmap
.len
= map
->end
- event
->mmap
.start
;
833 event
->mmap
.pid
= machine
->pid
;
835 err
= perf_tool__process_synth_event(tool
, event
, machine
, process
);
841 int perf_event__synthesize_thread_map2(struct perf_tool
*tool
,
842 struct thread_map
*threads
,
843 perf_event__handler_t process
,
844 struct machine
*machine
)
846 union perf_event
*event
;
849 size
= sizeof(event
->thread_map
);
850 size
+= threads
->nr
* sizeof(event
->thread_map
.entries
[0]);
852 event
= zalloc(size
);
856 event
->header
.type
= PERF_RECORD_THREAD_MAP
;
857 event
->header
.size
= size
;
858 event
->thread_map
.nr
= threads
->nr
;
860 for (i
= 0; i
< threads
->nr
; i
++) {
861 struct thread_map_event_entry
*entry
= &event
->thread_map
.entries
[i
];
862 char *comm
= thread_map__comm(threads
, i
);
867 entry
->pid
= thread_map__pid(threads
, i
);
868 strncpy((char *) &entry
->comm
, comm
, sizeof(entry
->comm
));
871 err
= process(tool
, event
, NULL
, machine
);
877 static void synthesize_cpus(struct cpu_map_entries
*cpus
,
884 for (i
= 0; i
< map
->nr
; i
++)
885 cpus
->cpu
[i
] = map
->map
[i
];
888 static void synthesize_mask(struct cpu_map_mask
*mask
,
889 struct cpu_map
*map
, int max
)
893 mask
->nr
= BITS_TO_LONGS(max
);
894 mask
->long_size
= sizeof(long);
896 for (i
= 0; i
< map
->nr
; i
++)
897 set_bit(map
->map
[i
], mask
->mask
);
900 static size_t cpus_size(struct cpu_map
*map
)
902 return sizeof(struct cpu_map_entries
) + map
->nr
* sizeof(u16
);
905 static size_t mask_size(struct cpu_map
*map
, int *max
)
911 for (i
= 0; i
< map
->nr
; i
++) {
912 /* bit possition of the cpu is + 1 */
913 int bit
= map
->map
[i
] + 1;
919 return sizeof(struct cpu_map_mask
) + BITS_TO_LONGS(*max
) * sizeof(long);
922 void *cpu_map_data__alloc(struct cpu_map
*map
, size_t *size
, u16
*type
, int *max
)
924 size_t size_cpus
, size_mask
;
925 bool is_dummy
= cpu_map__empty(map
);
928 * Both array and mask data have variable size based
929 * on the number of cpus and their actual values.
930 * The size of the 'struct cpu_map_data' is:
932 * array = size of 'struct cpu_map_entries' +
933 * number of cpus * sizeof(u64)
935 * mask = size of 'struct cpu_map_mask' +
936 * maximum cpu bit converted to size of longs
938 * and finaly + the size of 'struct cpu_map_data'.
940 size_cpus
= cpus_size(map
);
941 size_mask
= mask_size(map
, max
);
943 if (is_dummy
|| (size_cpus
< size_mask
)) {
945 *type
= PERF_CPU_MAP__CPUS
;
948 *type
= PERF_CPU_MAP__MASK
;
951 *size
+= sizeof(struct cpu_map_data
);
952 return zalloc(*size
);
955 void cpu_map_data__synthesize(struct cpu_map_data
*data
, struct cpu_map
*map
,
961 case PERF_CPU_MAP__CPUS
:
962 synthesize_cpus((struct cpu_map_entries
*) data
->data
, map
);
964 case PERF_CPU_MAP__MASK
:
965 synthesize_mask((struct cpu_map_mask
*) data
->data
, map
, max
);
971 static struct cpu_map_event
* cpu_map_event__new(struct cpu_map
*map
)
973 size_t size
= sizeof(struct cpu_map_event
);
974 struct cpu_map_event
*event
;
978 event
= cpu_map_data__alloc(map
, &size
, &type
, &max
);
982 event
->header
.type
= PERF_RECORD_CPU_MAP
;
983 event
->header
.size
= size
;
984 event
->data
.type
= type
;
986 cpu_map_data__synthesize(&event
->data
, map
, type
, max
);
990 int perf_event__synthesize_cpu_map(struct perf_tool
*tool
,
992 perf_event__handler_t process
,
993 struct machine
*machine
)
995 struct cpu_map_event
*event
;
998 event
= cpu_map_event__new(map
);
1002 err
= process(tool
, (union perf_event
*) event
, NULL
, machine
);
1008 int perf_event__synthesize_stat_config(struct perf_tool
*tool
,
1009 struct perf_stat_config
*config
,
1010 perf_event__handler_t process
,
1011 struct machine
*machine
)
1013 struct stat_config_event
*event
;
1014 int size
, i
= 0, err
;
1016 size
= sizeof(*event
);
1017 size
+= (PERF_STAT_CONFIG_TERM__MAX
* sizeof(event
->data
[0]));
1019 event
= zalloc(size
);
1023 event
->header
.type
= PERF_RECORD_STAT_CONFIG
;
1024 event
->header
.size
= size
;
1025 event
->nr
= PERF_STAT_CONFIG_TERM__MAX
;
1027 #define ADD(__term, __val) \
1028 event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \
1029 event->data[i].val = __val; \
1032 ADD(AGGR_MODE
, config
->aggr_mode
)
1033 ADD(INTERVAL
, config
->interval
)
1034 ADD(SCALE
, config
->scale
)
1036 WARN_ONCE(i
!= PERF_STAT_CONFIG_TERM__MAX
,
1037 "stat config terms unbalanced\n");
1040 err
= process(tool
, (union perf_event
*) event
, NULL
, machine
);
1046 int perf_event__synthesize_stat(struct perf_tool
*tool
,
1047 u32 cpu
, u32 thread
, u64 id
,
1048 struct perf_counts_values
*count
,
1049 perf_event__handler_t process
,
1050 struct machine
*machine
)
1052 struct stat_event event
;
1054 event
.header
.type
= PERF_RECORD_STAT
;
1055 event
.header
.size
= sizeof(event
);
1056 event
.header
.misc
= 0;
1060 event
.thread
= thread
;
1061 event
.val
= count
->val
;
1062 event
.ena
= count
->ena
;
1063 event
.run
= count
->run
;
1065 return process(tool
, (union perf_event
*) &event
, NULL
, machine
);
1068 int perf_event__synthesize_stat_round(struct perf_tool
*tool
,
1069 u64 evtime
, u64 type
,
1070 perf_event__handler_t process
,
1071 struct machine
*machine
)
1073 struct stat_round_event event
;
1075 event
.header
.type
= PERF_RECORD_STAT_ROUND
;
1076 event
.header
.size
= sizeof(event
);
1077 event
.header
.misc
= 0;
1079 event
.time
= evtime
;
1082 return process(tool
, (union perf_event
*) &event
, NULL
, machine
);
1085 void perf_event__read_stat_config(struct perf_stat_config
*config
,
1086 struct stat_config_event
*event
)
1090 for (i
= 0; i
< event
->nr
; i
++) {
1092 switch (event
->data
[i
].tag
) {
1093 #define CASE(__term, __val) \
1094 case PERF_STAT_CONFIG_TERM__##__term: \
1095 config->__val = event->data[i].val; \
1098 CASE(AGGR_MODE
, aggr_mode
)
1100 CASE(INTERVAL
, interval
)
1103 pr_warning("unknown stat config term %" PRIu64
"\n",
1104 event
->data
[i
].tag
);
1109 size_t perf_event__fprintf_comm(union perf_event
*event
, FILE *fp
)
1113 if (event
->header
.misc
& PERF_RECORD_MISC_COMM_EXEC
)
1118 return fprintf(fp
, "%s: %s:%d/%d\n", s
, event
->comm
.comm
, event
->comm
.pid
, event
->comm
.tid
);
1121 size_t perf_event__fprintf_namespaces(union perf_event
*event
, FILE *fp
)
1124 struct perf_ns_link_info
*ns_link_info
;
1125 u32 nr_namespaces
, idx
;
1127 ns_link_info
= event
->namespaces
.link_info
;
1128 nr_namespaces
= event
->namespaces
.nr_namespaces
;
1130 ret
+= fprintf(fp
, " %d/%d - nr_namespaces: %u\n\t\t[",
1131 event
->namespaces
.pid
,
1132 event
->namespaces
.tid
,
1135 for (idx
= 0; idx
< nr_namespaces
; idx
++) {
1136 if (idx
&& (idx
% 4 == 0))
1137 ret
+= fprintf(fp
, "\n\t\t ");
1139 ret
+= fprintf(fp
, "%u/%s: %" PRIu64
"/%#" PRIx64
"%s", idx
,
1140 perf_ns__name(idx
), (u64
)ns_link_info
[idx
].dev
,
1141 (u64
)ns_link_info
[idx
].ino
,
1142 ((idx
+ 1) != nr_namespaces
) ? ", " : "]\n");
1148 int perf_event__process_comm(struct perf_tool
*tool __maybe_unused
,
1149 union perf_event
*event
,
1150 struct perf_sample
*sample
,
1151 struct machine
*machine
)
1153 return machine__process_comm_event(machine
, event
, sample
);
1156 int perf_event__process_namespaces(struct perf_tool
*tool __maybe_unused
,
1157 union perf_event
*event
,
1158 struct perf_sample
*sample
,
1159 struct machine
*machine
)
1161 return machine__process_namespaces_event(machine
, event
, sample
);
1164 int perf_event__process_lost(struct perf_tool
*tool __maybe_unused
,
1165 union perf_event
*event
,
1166 struct perf_sample
*sample
,
1167 struct machine
*machine
)
1169 return machine__process_lost_event(machine
, event
, sample
);
1172 int perf_event__process_aux(struct perf_tool
*tool __maybe_unused
,
1173 union perf_event
*event
,
1174 struct perf_sample
*sample __maybe_unused
,
1175 struct machine
*machine
)
1177 return machine__process_aux_event(machine
, event
);
1180 int perf_event__process_itrace_start(struct perf_tool
*tool __maybe_unused
,
1181 union perf_event
*event
,
1182 struct perf_sample
*sample __maybe_unused
,
1183 struct machine
*machine
)
1185 return machine__process_itrace_start_event(machine
, event
);
1188 int perf_event__process_lost_samples(struct perf_tool
*tool __maybe_unused
,
1189 union perf_event
*event
,
1190 struct perf_sample
*sample
,
1191 struct machine
*machine
)
1193 return machine__process_lost_samples_event(machine
, event
, sample
);
1196 int perf_event__process_switch(struct perf_tool
*tool __maybe_unused
,
1197 union perf_event
*event
,
1198 struct perf_sample
*sample __maybe_unused
,
1199 struct machine
*machine
)
1201 return machine__process_switch_event(machine
, event
);
1204 size_t perf_event__fprintf_mmap(union perf_event
*event
, FILE *fp
)
1206 return fprintf(fp
, " %d/%d: [%#" PRIx64
"(%#" PRIx64
") @ %#" PRIx64
"]: %c %s\n",
1207 event
->mmap
.pid
, event
->mmap
.tid
, event
->mmap
.start
,
1208 event
->mmap
.len
, event
->mmap
.pgoff
,
1209 (event
->header
.misc
& PERF_RECORD_MISC_MMAP_DATA
) ? 'r' : 'x',
1210 event
->mmap
.filename
);
1213 size_t perf_event__fprintf_mmap2(union perf_event
*event
, FILE *fp
)
1215 return fprintf(fp
, " %d/%d: [%#" PRIx64
"(%#" PRIx64
") @ %#" PRIx64
1216 " %02x:%02x %"PRIu64
" %"PRIu64
"]: %c%c%c%c %s\n",
1217 event
->mmap2
.pid
, event
->mmap2
.tid
, event
->mmap2
.start
,
1218 event
->mmap2
.len
, event
->mmap2
.pgoff
, event
->mmap2
.maj
,
1219 event
->mmap2
.min
, event
->mmap2
.ino
,
1220 event
->mmap2
.ino_generation
,
1221 (event
->mmap2
.prot
& PROT_READ
) ? 'r' : '-',
1222 (event
->mmap2
.prot
& PROT_WRITE
) ? 'w' : '-',
1223 (event
->mmap2
.prot
& PROT_EXEC
) ? 'x' : '-',
1224 (event
->mmap2
.flags
& MAP_SHARED
) ? 's' : 'p',
1225 event
->mmap2
.filename
);
1228 size_t perf_event__fprintf_thread_map(union perf_event
*event
, FILE *fp
)
1230 struct thread_map
*threads
= thread_map__new_event(&event
->thread_map
);
1233 ret
= fprintf(fp
, " nr: ");
1236 ret
+= thread_map__fprintf(threads
, fp
);
1238 ret
+= fprintf(fp
, "failed to get threads from event\n");
1240 thread_map__put(threads
);
1244 size_t perf_event__fprintf_cpu_map(union perf_event
*event
, FILE *fp
)
1246 struct cpu_map
*cpus
= cpu_map__new_data(&event
->cpu_map
.data
);
1249 ret
= fprintf(fp
, ": ");
1252 ret
+= cpu_map__fprintf(cpus
, fp
);
1254 ret
+= fprintf(fp
, "failed to get cpumap from event\n");
1260 int perf_event__process_mmap(struct perf_tool
*tool __maybe_unused
,
1261 union perf_event
*event
,
1262 struct perf_sample
*sample
,
1263 struct machine
*machine
)
1265 return machine__process_mmap_event(machine
, event
, sample
);
1268 int perf_event__process_mmap2(struct perf_tool
*tool __maybe_unused
,
1269 union perf_event
*event
,
1270 struct perf_sample
*sample
,
1271 struct machine
*machine
)
1273 return machine__process_mmap2_event(machine
, event
, sample
);
1276 size_t perf_event__fprintf_task(union perf_event
*event
, FILE *fp
)
1278 return fprintf(fp
, "(%d:%d):(%d:%d)\n",
1279 event
->fork
.pid
, event
->fork
.tid
,
1280 event
->fork
.ppid
, event
->fork
.ptid
);
1283 int perf_event__process_fork(struct perf_tool
*tool __maybe_unused
,
1284 union perf_event
*event
,
1285 struct perf_sample
*sample
,
1286 struct machine
*machine
)
1288 return machine__process_fork_event(machine
, event
, sample
);
1291 int perf_event__process_exit(struct perf_tool
*tool __maybe_unused
,
1292 union perf_event
*event
,
1293 struct perf_sample
*sample
,
1294 struct machine
*machine
)
1296 return machine__process_exit_event(machine
, event
, sample
);
1299 size_t perf_event__fprintf_aux(union perf_event
*event
, FILE *fp
)
1301 return fprintf(fp
, " offset: %#"PRIx64
" size: %#"PRIx64
" flags: %#"PRIx64
" [%s%s%s]\n",
1302 event
->aux
.aux_offset
, event
->aux
.aux_size
,
1304 event
->aux
.flags
& PERF_AUX_FLAG_TRUNCATED
? "T" : "",
1305 event
->aux
.flags
& PERF_AUX_FLAG_OVERWRITE
? "O" : "",
1306 event
->aux
.flags
& PERF_AUX_FLAG_PARTIAL
? "P" : "");
1309 size_t perf_event__fprintf_itrace_start(union perf_event
*event
, FILE *fp
)
1311 return fprintf(fp
, " pid: %u tid: %u\n",
1312 event
->itrace_start
.pid
, event
->itrace_start
.tid
);
1315 size_t perf_event__fprintf_switch(union perf_event
*event
, FILE *fp
)
1317 bool out
= event
->header
.misc
& PERF_RECORD_MISC_SWITCH_OUT
;
1318 const char *in_out
= out
? "OUT" : "IN ";
1320 if (event
->header
.type
== PERF_RECORD_SWITCH
)
1321 return fprintf(fp
, " %s\n", in_out
);
1323 return fprintf(fp
, " %s %s pid/tid: %5u/%-5u\n",
1324 in_out
, out
? "next" : "prev",
1325 event
->context_switch
.next_prev_pid
,
1326 event
->context_switch
.next_prev_tid
);
1329 size_t perf_event__fprintf(union perf_event
*event
, FILE *fp
)
1331 size_t ret
= fprintf(fp
, "PERF_RECORD_%s",
1332 perf_event__name(event
->header
.type
));
1334 switch (event
->header
.type
) {
1335 case PERF_RECORD_COMM
:
1336 ret
+= perf_event__fprintf_comm(event
, fp
);
1338 case PERF_RECORD_FORK
:
1339 case PERF_RECORD_EXIT
:
1340 ret
+= perf_event__fprintf_task(event
, fp
);
1342 case PERF_RECORD_MMAP
:
1343 ret
+= perf_event__fprintf_mmap(event
, fp
);
1345 case PERF_RECORD_NAMESPACES
:
1346 ret
+= perf_event__fprintf_namespaces(event
, fp
);
1348 case PERF_RECORD_MMAP2
:
1349 ret
+= perf_event__fprintf_mmap2(event
, fp
);
1351 case PERF_RECORD_AUX
:
1352 ret
+= perf_event__fprintf_aux(event
, fp
);
1354 case PERF_RECORD_ITRACE_START
:
1355 ret
+= perf_event__fprintf_itrace_start(event
, fp
);
1357 case PERF_RECORD_SWITCH
:
1358 case PERF_RECORD_SWITCH_CPU_WIDE
:
1359 ret
+= perf_event__fprintf_switch(event
, fp
);
1362 ret
+= fprintf(fp
, "\n");
1368 int perf_event__process(struct perf_tool
*tool __maybe_unused
,
1369 union perf_event
*event
,
1370 struct perf_sample
*sample
,
1371 struct machine
*machine
)
1373 return machine__process_event(machine
, event
, sample
);
1376 void thread__find_addr_map(struct thread
*thread
, u8 cpumode
,
1377 enum map_type type
, u64 addr
,
1378 struct addr_location
*al
)
1380 struct map_groups
*mg
= thread
->mg
;
1381 struct machine
*machine
= mg
->machine
;
1382 bool load_map
= false;
1384 al
->machine
= machine
;
1385 al
->thread
= thread
;
1387 al
->cpumode
= cpumode
;
1390 if (machine
== NULL
) {
1395 if (cpumode
== PERF_RECORD_MISC_KERNEL
&& perf_host
) {
1397 mg
= &machine
->kmaps
;
1399 } else if (cpumode
== PERF_RECORD_MISC_USER
&& perf_host
) {
1401 } else if (cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
&& perf_guest
) {
1403 mg
= &machine
->kmaps
;
1405 } else if (cpumode
== PERF_RECORD_MISC_GUEST_USER
&& perf_guest
) {
1411 if ((cpumode
== PERF_RECORD_MISC_GUEST_USER
||
1412 cpumode
== PERF_RECORD_MISC_GUEST_KERNEL
) &&
1414 al
->filtered
|= (1 << HIST_FILTER__GUEST
);
1415 if ((cpumode
== PERF_RECORD_MISC_USER
||
1416 cpumode
== PERF_RECORD_MISC_KERNEL
) &&
1418 al
->filtered
|= (1 << HIST_FILTER__HOST
);
1423 al
->map
= map_groups__find(mg
, type
, al
->addr
);
1424 if (al
->map
== NULL
) {
1426 * If this is outside of all known maps, and is a negative
1427 * address, try to look it up in the kernel dso, as it might be
1428 * a vsyscall or vdso (which executes in user-mode).
1430 * XXX This is nasty, we should have a symbol list in the
1431 * "[vdso]" dso, but for now lets use the old trick of looking
1432 * in the whole kernel symbol list.
1434 if (cpumode
== PERF_RECORD_MISC_USER
&& machine
&&
1435 mg
!= &machine
->kmaps
&&
1436 machine__kernel_ip(machine
, al
->addr
)) {
1437 mg
= &machine
->kmaps
;
1443 * Kernel maps might be changed when loading symbols so loading
1444 * must be done prior to using kernel maps.
1448 al
->addr
= al
->map
->map_ip(al
->map
, al
->addr
);
1452 void thread__find_addr_location(struct thread
*thread
,
1453 u8 cpumode
, enum map_type type
, u64 addr
,
1454 struct addr_location
*al
)
1456 thread__find_addr_map(thread
, cpumode
, type
, addr
, al
);
1457 if (al
->map
!= NULL
)
1458 al
->sym
= map__find_symbol(al
->map
, al
->addr
);
1464 * Callers need to drop the reference to al->thread, obtained in
1465 * machine__findnew_thread()
1467 int machine__resolve(struct machine
*machine
, struct addr_location
*al
,
1468 struct perf_sample
*sample
)
1470 struct thread
*thread
= machine__findnew_thread(machine
, sample
->pid
,
1476 dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread
), thread
->tid
);
1478 * Have we already created the kernel maps for this machine?
1480 * This should have happened earlier, when we processed the kernel MMAP
1481 * events, but for older perf.data files there was no such thing, so do
1484 if (sample
->cpumode
== PERF_RECORD_MISC_KERNEL
&&
1485 machine__kernel_map(machine
) == NULL
)
1486 machine__create_kernel_maps(machine
);
1488 thread__find_addr_map(thread
, sample
->cpumode
, MAP__FUNCTION
, sample
->ip
, al
);
1489 dump_printf(" ...... dso: %s\n",
1490 al
->map
? al
->map
->dso
->long_name
:
1491 al
->level
== 'H' ? "[hypervisor]" : "<not found>");
1493 if (thread__is_filtered(thread
))
1494 al
->filtered
|= (1 << HIST_FILTER__THREAD
);
1497 al
->cpu
= sample
->cpu
;
1501 struct perf_env
*env
= machine
->env
;
1503 if (env
&& env
->cpu
)
1504 al
->socket
= env
->cpu
[al
->cpu
].socket_id
;
1508 struct dso
*dso
= al
->map
->dso
;
1510 if (symbol_conf
.dso_list
&&
1511 (!dso
|| !(strlist__has_entry(symbol_conf
.dso_list
,
1513 (dso
->short_name
!= dso
->long_name
&&
1514 strlist__has_entry(symbol_conf
.dso_list
,
1515 dso
->long_name
))))) {
1516 al
->filtered
|= (1 << HIST_FILTER__DSO
);
1519 al
->sym
= map__find_symbol(al
->map
, al
->addr
);
1522 if (symbol_conf
.sym_list
&&
1523 (!al
->sym
|| !strlist__has_entry(symbol_conf
.sym_list
,
1525 al
->filtered
|= (1 << HIST_FILTER__SYMBOL
);
1532 * The preprocess_sample method will return with reference counts for the
1533 * in it, when done using (and perhaps getting ref counts if needing to
1534 * keep a pointer to one of those entries) it must be paired with
1535 * addr_location__put(), so that the refcounts can be decremented.
1537 void addr_location__put(struct addr_location
*al
)
1539 thread__zput(al
->thread
);
1542 bool is_bts_event(struct perf_event_attr
*attr
)
1544 return attr
->type
== PERF_TYPE_HARDWARE
&&
1545 (attr
->config
& PERF_COUNT_HW_BRANCH_INSTRUCTIONS
) &&
1546 attr
->sample_period
== 1;
1549 bool sample_addr_correlates_sym(struct perf_event_attr
*attr
)
1551 if (attr
->type
== PERF_TYPE_SOFTWARE
&&
1552 (attr
->config
== PERF_COUNT_SW_PAGE_FAULTS
||
1553 attr
->config
== PERF_COUNT_SW_PAGE_FAULTS_MIN
||
1554 attr
->config
== PERF_COUNT_SW_PAGE_FAULTS_MAJ
))
1557 if (is_bts_event(attr
))
1563 void thread__resolve(struct thread
*thread
, struct addr_location
*al
,
1564 struct perf_sample
*sample
)
1566 thread__find_addr_map(thread
, sample
->cpumode
, MAP__FUNCTION
, sample
->addr
, al
);
1568 thread__find_addr_map(thread
, sample
->cpumode
, MAP__VARIABLE
,
1571 al
->cpu
= sample
->cpu
;
1575 al
->sym
= map__find_symbol(al
->map
, al
->addr
);