1 #include <linux/types.h>
10 static pid_t
event__synthesize_comm(pid_t pid
, int full
,
11 event__handler_t process
,
12 struct perf_session
*session
)
15 char filename
[PATH_MAX
];
20 struct dirent dirent
, *next
;
23 snprintf(filename
, sizeof(filename
), "/proc/%d/status", pid
);
25 fp
= fopen(filename
, "r");
29 * We raced with a task exiting - just return:
31 pr_debug("couldn't open %s\n", filename
);
35 memset(&ev
.comm
, 0, sizeof(ev
.comm
));
36 while (!ev
.comm
.comm
[0] || !ev
.comm
.pid
) {
37 if (fgets(bf
, sizeof(bf
), fp
) == NULL
)
40 if (memcmp(bf
, "Name:", 5) == 0) {
42 while (*name
&& isspace(*name
))
44 size
= strlen(name
) - 1;
45 memcpy(ev
.comm
.comm
, name
, size
++);
46 } else if (memcmp(bf
, "Tgid:", 5) == 0) {
48 while (*tgids
&& isspace(*tgids
))
50 tgid
= ev
.comm
.pid
= atoi(tgids
);
54 ev
.comm
.header
.type
= PERF_RECORD_COMM
;
55 size
= ALIGN(size
, sizeof(u64
));
56 ev
.comm
.header
.size
= sizeof(ev
.comm
) - (sizeof(ev
.comm
.comm
) - size
);
61 process(&ev
, session
);
65 snprintf(filename
, sizeof(filename
), "/proc/%d/task", pid
);
67 tasks
= opendir(filename
);
71 while (!readdir_r(tasks
, &dirent
, &next
) && next
) {
73 pid
= strtol(dirent
.d_name
, &end
, 10);
79 process(&ev
, session
);
88 pr_warning("couldn't get COMM and pgid, malformed %s\n", filename
);
92 static int event__synthesize_mmap_events(pid_t pid
, pid_t tgid
,
93 event__handler_t process
,
94 struct perf_session
*session
)
96 char filename
[PATH_MAX
];
99 snprintf(filename
, sizeof(filename
), "/proc/%d/maps", pid
);
101 fp
= fopen(filename
, "r");
104 * We raced with a task exiting - just return:
106 pr_debug("couldn't open %s\n", filename
);
111 char bf
[BUFSIZ
], *pbf
= bf
;
114 .type
= PERF_RECORD_MMAP
,
115 .misc
= 0, /* Just like the kernel, see kernel/perf_event.c __perf_event_mmap */
120 if (fgets(bf
, sizeof(bf
), fp
) == NULL
)
123 /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */
124 n
= hex2u64(pbf
, &ev
.mmap
.start
);
128 n
= hex2u64(pbf
, &ev
.mmap
.len
);
132 if (*pbf
== 'x') { /* vm_exec */
133 char *execname
= strchr(bf
, '/');
136 if (execname
== NULL
)
137 execname
= strstr(bf
, "[vdso]");
139 if (execname
== NULL
)
142 size
= strlen(execname
);
143 execname
[size
- 1] = '\0'; /* Remove \n */
144 memcpy(ev
.mmap
.filename
, execname
, size
);
145 size
= ALIGN(size
, sizeof(u64
));
146 ev
.mmap
.len
-= ev
.mmap
.start
;
147 ev
.mmap
.header
.size
= (sizeof(ev
.mmap
) -
148 (sizeof(ev
.mmap
.filename
) - size
));
152 process(&ev
, session
);
160 int event__synthesize_modules(event__handler_t process
,
161 struct perf_session
*session
)
165 for (nd
= rb_first(&session
->kmaps
.maps
[MAP__FUNCTION
]);
166 nd
; nd
= rb_next(nd
)) {
169 struct map
*pos
= rb_entry(nd
, struct map
, rb_node
);
171 if (pos
->dso
->kernel
)
174 size
= ALIGN(pos
->dso
->long_name_len
+ 1, sizeof(u64
));
175 memset(&ev
, 0, sizeof(ev
));
176 ev
.mmap
.header
.misc
= 1; /* kernel uses 0 for user space maps, see kernel/perf_event.c __perf_event_mmap */
177 ev
.mmap
.header
.type
= PERF_RECORD_MMAP
;
178 ev
.mmap
.header
.size
= (sizeof(ev
.mmap
) -
179 (sizeof(ev
.mmap
.filename
) - size
));
180 ev
.mmap
.start
= pos
->start
;
181 ev
.mmap
.len
= pos
->end
- pos
->start
;
183 memcpy(ev
.mmap
.filename
, pos
->dso
->long_name
,
184 pos
->dso
->long_name_len
+ 1);
185 process(&ev
, session
);
191 int event__synthesize_thread(pid_t pid
, event__handler_t process
,
192 struct perf_session
*session
)
194 pid_t tgid
= event__synthesize_comm(pid
, 1, process
, session
);
197 return event__synthesize_mmap_events(pid
, tgid
, process
, session
);
200 void event__synthesize_threads(event__handler_t process
,
201 struct perf_session
*session
)
204 struct dirent dirent
, *next
;
206 proc
= opendir("/proc");
208 while (!readdir_r(proc
, &dirent
, &next
) && next
) {
210 pid_t pid
= strtol(dirent
.d_name
, &end
, 10);
212 if (*end
) /* only interested in proper numerical dirents */
215 event__synthesize_thread(pid
, process
, session
);
221 struct process_symbol_args
{
226 static int find_symbol_cb(void *arg
, const char *name
, char type
, u64 start
)
228 struct process_symbol_args
*args
= arg
;
231 * Must be a function or at least an alias, as in PARISC64, where "_text" is
232 * an 'A' to the same address as "_stext".
234 if (!(symbol_type__is_a(type
, MAP__FUNCTION
) ||
235 type
== 'A') || strcmp(name
, args
->name
))
242 int event__synthesize_kernel_mmap(event__handler_t process
,
243 struct perf_session
*session
,
244 const char *symbol_name
)
249 .type
= PERF_RECORD_MMAP
,
250 .misc
= 1, /* kernel uses 0 for user space maps, see kernel/perf_event.c __perf_event_mmap */
254 * We should get this from /sys/kernel/sections/.text, but till that is
255 * available use this, and after it is use this as a fallback for older
258 struct process_symbol_args args
= { .name
= symbol_name
, };
260 if (kallsyms__parse("/proc/kallsyms", &args
, find_symbol_cb
) <= 0)
263 size
= snprintf(ev
.mmap
.filename
, sizeof(ev
.mmap
.filename
),
264 "[kernel.kallsyms.%s]", symbol_name
) + 1;
265 size
= ALIGN(size
, sizeof(u64
));
266 ev
.mmap
.header
.size
= (sizeof(ev
.mmap
) - (sizeof(ev
.mmap
.filename
) - size
));
267 ev
.mmap
.pgoff
= args
.start
;
268 ev
.mmap
.start
= session
->vmlinux_maps
[MAP__FUNCTION
]->start
;
269 ev
.mmap
.len
= session
->vmlinux_maps
[MAP__FUNCTION
]->end
- ev
.mmap
.start
;
271 return process(&ev
, session
);
274 static void thread__comm_adjust(struct thread
*self
)
276 char *comm
= self
->comm
;
278 if (!symbol_conf
.col_width_list_str
&& !symbol_conf
.field_sep
&&
279 (!symbol_conf
.comm_list
||
280 strlist__has_entry(symbol_conf
.comm_list
, comm
))) {
281 unsigned int slen
= strlen(comm
);
283 if (slen
> comms__col_width
) {
284 comms__col_width
= slen
;
285 threads__col_width
= slen
+ 6;
290 static int thread__set_comm_adjust(struct thread
*self
, const char *comm
)
292 int ret
= thread__set_comm(self
, comm
);
297 thread__comm_adjust(self
);
302 int event__process_comm(event_t
*self
, struct perf_session
*session
)
304 struct thread
*thread
= perf_session__findnew(session
, self
->comm
.pid
);
306 dump_printf(": %s:%d\n", self
->comm
.comm
, self
->comm
.pid
);
308 if (thread
== NULL
|| thread__set_comm_adjust(thread
, self
->comm
.comm
)) {
309 dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
316 int event__process_lost(event_t
*self
, struct perf_session
*session
)
318 dump_printf(": id:%Ld: lost:%Ld\n", self
->lost
.id
, self
->lost
.lost
);
319 session
->events_stats
.lost
+= self
->lost
.lost
;
323 int event__process_mmap(event_t
*self
, struct perf_session
*session
)
325 struct thread
*thread
;
328 dump_printf(" %d/%d: [%#Lx(%#Lx) @ %#Lx]: %s\n",
329 self
->mmap
.pid
, self
->mmap
.tid
, self
->mmap
.start
,
330 self
->mmap
.len
, self
->mmap
.pgoff
, self
->mmap
.filename
);
332 if (self
->mmap
.pid
== 0) {
333 static const char kmmap_prefix
[] = "[kernel.kallsyms.";
335 if (self
->mmap
.filename
[0] == '/') {
336 char short_module_name
[1024];
337 char *name
= strrchr(self
->mmap
.filename
, '/'), *dot
;
343 dot
= strrchr(name
, '.');
347 snprintf(short_module_name
, sizeof(short_module_name
),
348 "[%.*s]", (int)(dot
- name
), name
);
349 strxfrchar(short_module_name
, '-', '_');
351 map
= perf_session__new_module_map(session
,
353 self
->mmap
.filename
);
357 name
= strdup(short_module_name
);
361 map
->dso
->short_name
= name
;
362 map
->end
= map
->start
+ self
->mmap
.len
;
363 } else if (memcmp(self
->mmap
.filename
, kmmap_prefix
,
364 sizeof(kmmap_prefix
) - 1) == 0) {
365 const char *symbol_name
= (self
->mmap
.filename
+
366 sizeof(kmmap_prefix
) - 1);
368 * Should be there already, from the build-id table in
371 struct dso
*kernel
= __dsos__findnew(&dsos__kernel
,
372 "[kernel.kallsyms]");
377 if (__perf_session__create_kernel_maps(session
, kernel
) < 0)
380 session
->vmlinux_maps
[MAP__FUNCTION
]->start
= self
->mmap
.start
;
381 session
->vmlinux_maps
[MAP__FUNCTION
]->end
= self
->mmap
.start
+ self
->mmap
.len
;
383 * Be a bit paranoid here, some perf.data file came with
384 * a zero sized synthesized MMAP event for the kernel.
386 if (session
->vmlinux_maps
[MAP__FUNCTION
]->end
== 0)
387 session
->vmlinux_maps
[MAP__FUNCTION
]->end
= ~0UL;
389 perf_session__set_kallsyms_ref_reloc_sym(session
, symbol_name
,
395 thread
= perf_session__findnew(session
, self
->mmap
.pid
);
396 map
= map__new(&self
->mmap
, MAP__FUNCTION
,
397 session
->cwd
, session
->cwdlen
);
399 if (thread
== NULL
|| map
== NULL
)
402 thread__insert_map(thread
, map
);
406 dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n");
410 int event__process_task(event_t
*self
, struct perf_session
*session
)
412 struct thread
*thread
= perf_session__findnew(session
, self
->fork
.pid
);
413 struct thread
*parent
= perf_session__findnew(session
, self
->fork
.ppid
);
415 dump_printf("(%d:%d):(%d:%d)\n", self
->fork
.pid
, self
->fork
.tid
,
416 self
->fork
.ppid
, self
->fork
.ptid
);
418 * A thread clone will have the same PID for both parent and child.
420 if (thread
== parent
)
423 if (self
->header
.type
== PERF_RECORD_EXIT
)
426 if (thread
== NULL
|| parent
== NULL
||
427 thread__fork(thread
, parent
) < 0) {
428 dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n");
435 void thread__find_addr_map(struct thread
*self
,
436 struct perf_session
*session
, u8 cpumode
,
437 enum map_type type
, u64 addr
,
438 struct addr_location
*al
)
440 struct map_groups
*mg
= &self
->mg
;
445 if (cpumode
== PERF_RECORD_MISC_KERNEL
) {
447 mg
= &session
->kmaps
;
448 } else if (cpumode
== PERF_RECORD_MISC_USER
)
456 al
->map
= map_groups__find(mg
, type
, al
->addr
);
457 if (al
->map
== NULL
) {
459 * If this is outside of all known maps, and is a negative
460 * address, try to look it up in the kernel dso, as it might be
461 * a vsyscall or vdso (which executes in user-mode).
463 * XXX This is nasty, we should have a symbol list in the
464 * "[vdso]" dso, but for now lets use the old trick of looking
465 * in the whole kernel symbol list.
467 if ((long long)al
->addr
< 0 && mg
!= &session
->kmaps
) {
468 mg
= &session
->kmaps
;
472 al
->addr
= al
->map
->map_ip(al
->map
, al
->addr
);
475 void thread__find_addr_location(struct thread
*self
,
476 struct perf_session
*session
, u8 cpumode
,
477 enum map_type type
, u64 addr
,
478 struct addr_location
*al
,
479 symbol_filter_t filter
)
481 thread__find_addr_map(self
, session
, cpumode
, type
, addr
, al
);
483 al
->sym
= map__find_symbol(al
->map
, al
->addr
, filter
);
488 static void dso__calc_col_width(struct dso
*self
)
490 if (!symbol_conf
.col_width_list_str
&& !symbol_conf
.field_sep
&&
491 (!symbol_conf
.dso_list
||
492 strlist__has_entry(symbol_conf
.dso_list
, self
->name
))) {
493 unsigned int slen
= strlen(self
->name
);
494 if (slen
> dsos__col_width
)
495 dsos__col_width
= slen
;
498 self
->slen_calculated
= 1;
501 int event__preprocess_sample(const event_t
*self
, struct perf_session
*session
,
502 struct addr_location
*al
, symbol_filter_t filter
)
504 u8 cpumode
= self
->header
.misc
& PERF_RECORD_MISC_CPUMODE_MASK
;
505 struct thread
*thread
= perf_session__findnew(session
, self
->ip
.pid
);
510 if (symbol_conf
.comm_list
&&
511 !strlist__has_entry(symbol_conf
.comm_list
, thread
->comm
))
514 dump_printf(" ... thread: %s:%d\n", thread
->comm
, thread
->pid
);
516 thread__find_addr_location(thread
, session
, cpumode
, MAP__FUNCTION
,
517 self
->ip
.ip
, al
, filter
);
518 dump_printf(" ...... dso: %s\n",
519 al
->map
? al
->map
->dso
->long_name
:
520 al
->level
== 'H' ? "[hypervisor]" : "<not found>");
522 * We have to do this here as we may have a dso with no symbol hit that
523 * has a name longer than the ones with symbols sampled.
525 if (al
->map
&& !sort_dso
.elide
&& !al
->map
->dso
->slen_calculated
)
526 dso__calc_col_width(al
->map
->dso
);
528 if (symbol_conf
.dso_list
&&
529 (!al
->map
|| !al
->map
->dso
||
530 !(strlist__has_entry(symbol_conf
.dso_list
, al
->map
->dso
->short_name
) ||
531 (al
->map
->dso
->short_name
!= al
->map
->dso
->long_name
&&
532 strlist__has_entry(symbol_conf
.dso_list
, al
->map
->dso
->long_name
)))))
535 if (symbol_conf
.sym_list
&& al
->sym
&&
536 !strlist__has_entry(symbol_conf
.sym_list
, al
->sym
->name
))
539 al
->filtered
= false;
547 int event__parse_sample(event_t
*event
, u64 type
, struct sample_data
*data
)
549 u64
*array
= event
->sample
.array
;
551 if (type
& PERF_SAMPLE_IP
) {
552 data
->ip
= event
->ip
.ip
;
556 if (type
& PERF_SAMPLE_TID
) {
557 u32
*p
= (u32
*)array
;
563 if (type
& PERF_SAMPLE_TIME
) {
568 if (type
& PERF_SAMPLE_ADDR
) {
573 if (type
& PERF_SAMPLE_ID
) {
578 if (type
& PERF_SAMPLE_STREAM_ID
) {
579 data
->stream_id
= *array
;
583 if (type
& PERF_SAMPLE_CPU
) {
584 u32
*p
= (u32
*)array
;
589 if (type
& PERF_SAMPLE_PERIOD
) {
590 data
->period
= *array
;
594 if (type
& PERF_SAMPLE_READ
) {
595 pr_debug("PERF_SAMPLE_READ is unsuported for now\n");
599 if (type
& PERF_SAMPLE_CALLCHAIN
) {
600 data
->callchain
= (struct ip_callchain
*)array
;
601 array
+= 1 + data
->callchain
->nr
;
604 if (type
& PERF_SAMPLE_RAW
) {
605 u32
*p
= (u32
*)array
;