5 #include <linux/list.h>
10 #include "trace-event.h"
16 * Create new perf.data header attribute:
18 struct perf_header_attr
*perf_header_attr__new(struct perf_event_attr
*attr
)
20 struct perf_header_attr
*self
= malloc(sizeof(*self
));
26 self
->id
= malloc(sizeof(u64
));
27 if (self
->id
== NULL
) {
36 void perf_header_attr__delete(struct perf_header_attr
*self
)
42 int perf_header_attr__add_id(struct perf_header_attr
*self
, u64 id
)
47 if (self
->ids
> self
->size
) {
48 int nsize
= self
->size
* 2;
49 u64
*nid
= realloc(self
->id
, nsize
* sizeof(u64
));
62 * Create new perf.data header:
64 struct perf_header
*perf_header__new(void)
66 struct perf_header
*self
= zalloc(sizeof(*self
));
70 self
->attr
= malloc(sizeof(void *));
72 if (self
->attr
== NULL
) {
81 void perf_header__delete(struct perf_header
*self
)
85 for (i
= 0; i
< self
->attrs
; ++i
)
86 perf_header_attr__delete(self
->attr
[i
]);
92 int perf_header__add_attr(struct perf_header
*self
,
93 struct perf_header_attr
*attr
)
98 if (self
->attrs
== self
->size
) {
99 int nsize
= self
->size
* 2;
100 struct perf_header_attr
**nattr
;
102 nattr
= realloc(self
->attr
, nsize
* sizeof(void *));
110 self
->attr
[self
->attrs
++] = attr
;
114 #define MAX_EVENT_NAME 64
116 struct perf_trace_event_type
{
118 char name
[MAX_EVENT_NAME
];
121 static int event_count
;
122 static struct perf_trace_event_type
*events
;
124 void perf_header__push_event(u64 id
, const char *name
)
126 if (strlen(name
) > MAX_EVENT_NAME
)
127 pr_warning("Event %s will be truncated\n", name
);
130 events
= malloc(sizeof(struct perf_trace_event_type
));
134 events
= realloc(events
, (event_count
+ 1) * sizeof(struct perf_trace_event_type
));
138 memset(&events
[event_count
], 0, sizeof(struct perf_trace_event_type
));
139 events
[event_count
].event_id
= id
;
140 strncpy(events
[event_count
].name
, name
, MAX_EVENT_NAME
- 1);
144 char *perf_header__find_event(u64 id
)
147 for (i
= 0 ; i
< event_count
; i
++) {
148 if (events
[i
].event_id
== id
)
149 return events
[i
].name
;
154 static const char *__perf_magic
= "PERFFILE";
156 #define PERF_MAGIC (*(u64 *)__perf_magic)
158 struct perf_file_attr
{
159 struct perf_event_attr attr
;
160 struct perf_file_section ids
;
163 void perf_header__set_feat(struct perf_header
*self
, int feat
)
165 set_bit(feat
, self
->adds_features
);
168 bool perf_header__has_feat(const struct perf_header
*self
, int feat
)
170 return test_bit(feat
, self
->adds_features
);
173 static int do_write(int fd
, const void *buf
, size_t size
)
176 int ret
= write(fd
, buf
, size
);
188 static int dsos__write_buildid_table(int fd
)
192 list_for_each_entry(pos
, &dsos
, node
) {
194 struct build_id_event b
;
197 if (!pos
->has_build_id
)
199 len
= pos
->long_name_len
+ 1;
200 len
= ALIGN(len
, 64);
201 memset(&b
, 0, sizeof(b
));
202 memcpy(&b
.build_id
, pos
->build_id
, sizeof(pos
->build_id
));
203 b
.header
.size
= sizeof(b
) + len
;
204 err
= do_write(fd
, &b
, sizeof(b
));
207 err
= do_write(fd
, pos
->long_name
, len
);
215 static int perf_header__adds_write(struct perf_header
*self
, int fd
)
218 struct perf_file_section
*feat_sec
;
223 if (dsos__read_build_ids())
224 perf_header__set_feat(self
, HEADER_BUILD_ID
);
226 nr_sections
= bitmap_weight(self
->adds_features
, HEADER_FEAT_BITS
);
230 feat_sec
= calloc(sizeof(*feat_sec
), nr_sections
);
231 if (feat_sec
== NULL
)
234 sec_size
= sizeof(*feat_sec
) * nr_sections
;
236 sec_start
= self
->data_offset
+ self
->data_size
;
237 lseek(fd
, sec_start
+ sec_size
, SEEK_SET
);
239 if (perf_header__has_feat(self
, HEADER_TRACE_INFO
)) {
240 struct perf_file_section
*trace_sec
;
242 trace_sec
= &feat_sec
[idx
++];
244 /* Write trace info */
245 trace_sec
->offset
= lseek(fd
, 0, SEEK_CUR
);
246 read_tracing_data(fd
, attrs
, nr_counters
);
247 trace_sec
->size
= lseek(fd
, 0, SEEK_CUR
) - trace_sec
->offset
;
251 if (perf_header__has_feat(self
, HEADER_BUILD_ID
)) {
252 struct perf_file_section
*buildid_sec
;
254 buildid_sec
= &feat_sec
[idx
++];
256 /* Write build-ids */
257 buildid_sec
->offset
= lseek(fd
, 0, SEEK_CUR
);
258 err
= dsos__write_buildid_table(fd
);
260 pr_debug("failed to write buildid table\n");
263 buildid_sec
->size
= lseek(fd
, 0, SEEK_CUR
) - buildid_sec
->offset
;
266 lseek(fd
, sec_start
, SEEK_SET
);
267 err
= do_write(fd
, feat_sec
, sec_size
);
269 pr_debug("failed to write feature section\n");
275 int perf_header__write(struct perf_header
*self
, int fd
, bool at_exit
)
277 struct perf_file_header f_header
;
278 struct perf_file_attr f_attr
;
279 struct perf_header_attr
*attr
;
282 lseek(fd
, sizeof(f_header
), SEEK_SET
);
285 for (i
= 0; i
< self
->attrs
; i
++) {
286 attr
= self
->attr
[i
];
288 attr
->id_offset
= lseek(fd
, 0, SEEK_CUR
);
289 err
= do_write(fd
, attr
->id
, attr
->ids
* sizeof(u64
));
291 pr_debug("failed to write perf header\n");
297 self
->attr_offset
= lseek(fd
, 0, SEEK_CUR
);
299 for (i
= 0; i
< self
->attrs
; i
++) {
300 attr
= self
->attr
[i
];
302 f_attr
= (struct perf_file_attr
){
305 .offset
= attr
->id_offset
,
306 .size
= attr
->ids
* sizeof(u64
),
309 err
= do_write(fd
, &f_attr
, sizeof(f_attr
));
311 pr_debug("failed to write perf header attribute\n");
316 self
->event_offset
= lseek(fd
, 0, SEEK_CUR
);
317 self
->event_size
= event_count
* sizeof(struct perf_trace_event_type
);
319 err
= do_write(fd
, events
, self
->event_size
);
321 pr_debug("failed to write perf header events\n");
326 self
->data_offset
= lseek(fd
, 0, SEEK_CUR
);
329 err
= perf_header__adds_write(self
, fd
);
334 f_header
= (struct perf_file_header
){
336 .size
= sizeof(f_header
),
337 .attr_size
= sizeof(f_attr
),
339 .offset
= self
->attr_offset
,
340 .size
= self
->attrs
* sizeof(f_attr
),
343 .offset
= self
->data_offset
,
344 .size
= self
->data_size
,
347 .offset
= self
->event_offset
,
348 .size
= self
->event_size
,
352 memcpy(&f_header
.adds_features
, &self
->adds_features
, sizeof(self
->adds_features
));
354 lseek(fd
, 0, SEEK_SET
);
355 err
= do_write(fd
, &f_header
, sizeof(f_header
));
357 pr_debug("failed to write perf header\n");
360 lseek(fd
, self
->data_offset
+ self
->data_size
, SEEK_SET
);
366 static void do_read(int fd
, void *buf
, size_t size
)
369 int ret
= read(fd
, buf
, size
);
372 die("failed to read");
374 die("failed to read: missing data");
381 int perf_header__process_sections(struct perf_header
*self
, int fd
,
382 int (*process
)(struct perf_file_section
*self
,
385 struct perf_file_section
*feat_sec
;
389 int err
= 0, feat
= 1;
391 nr_sections
= bitmap_weight(self
->adds_features
, HEADER_FEAT_BITS
);
395 feat_sec
= calloc(sizeof(*feat_sec
), nr_sections
);
399 sec_size
= sizeof(*feat_sec
) * nr_sections
;
401 lseek(fd
, self
->data_offset
+ self
->data_size
, SEEK_SET
);
403 do_read(fd
, feat_sec
, sec_size
);
405 while (idx
< nr_sections
&& feat
< HEADER_LAST_FEATURE
) {
406 if (perf_header__has_feat(self
, feat
)) {
407 struct perf_file_section
*sec
= &feat_sec
[idx
++];
409 err
= process(sec
, feat
, fd
);
420 int perf_file_header__read(struct perf_file_header
*self
,
421 struct perf_header
*ph
, int fd
)
423 lseek(fd
, 0, SEEK_SET
);
424 do_read(fd
, self
, sizeof(*self
));
426 if (self
->magic
!= PERF_MAGIC
||
427 self
->attr_size
!= sizeof(struct perf_file_attr
))
430 if (self
->size
!= sizeof(*self
)) {
431 /* Support the previous format */
432 if (self
->size
== offsetof(typeof(*self
), adds_features
))
433 bitmap_zero(self
->adds_features
, HEADER_FEAT_BITS
);
438 memcpy(&ph
->adds_features
, &self
->adds_features
,
439 sizeof(self
->adds_features
));
441 ph
->event_offset
= self
->event_types
.offset
;
442 ph
->event_size
= self
->event_types
.size
;
443 ph
->data_offset
= self
->data
.offset
;
444 ph
->data_size
= self
->data
.size
;
448 static int perf_file_section__process(struct perf_file_section
*self
,
451 if (lseek(fd
, self
->offset
, SEEK_SET
) < 0) {
452 pr_debug("Failed to lseek to %Ld offset for feature %d, "
453 "continuing...\n", self
->offset
, feat
);
458 case HEADER_TRACE_INFO
:
462 case HEADER_BUILD_ID
:
463 if (perf_header__read_build_ids(fd
, self
->offset
, self
->size
))
464 pr_debug("Failed to read buildids, continuing...\n");
467 pr_debug("unknown feature %d, continuing...\n", feat
);
473 int perf_header__read(struct perf_header
*self
, int fd
)
475 struct perf_file_header f_header
;
476 struct perf_file_attr f_attr
;
478 int nr_attrs
, nr_ids
, i
, j
;
480 if (perf_file_header__read(&f_header
, self
, fd
) < 0) {
481 pr_debug("incompatible file format\n");
485 nr_attrs
= f_header
.attrs
.size
/ sizeof(f_attr
);
486 lseek(fd
, f_header
.attrs
.offset
, SEEK_SET
);
488 for (i
= 0; i
< nr_attrs
; i
++) {
489 struct perf_header_attr
*attr
;
492 do_read(fd
, &f_attr
, sizeof(f_attr
));
493 tmp
= lseek(fd
, 0, SEEK_CUR
);
495 attr
= perf_header_attr__new(&f_attr
.attr
);
499 nr_ids
= f_attr
.ids
.size
/ sizeof(u64
);
500 lseek(fd
, f_attr
.ids
.offset
, SEEK_SET
);
502 for (j
= 0; j
< nr_ids
; j
++) {
503 do_read(fd
, &f_id
, sizeof(f_id
));
505 if (perf_header_attr__add_id(attr
, f_id
) < 0) {
506 perf_header_attr__delete(attr
);
510 if (perf_header__add_attr(self
, attr
) < 0) {
511 perf_header_attr__delete(attr
);
515 lseek(fd
, tmp
, SEEK_SET
);
518 if (f_header
.event_types
.size
) {
519 lseek(fd
, f_header
.event_types
.offset
, SEEK_SET
);
520 events
= malloc(f_header
.event_types
.size
);
523 do_read(fd
, events
, f_header
.event_types
.size
);
524 event_count
= f_header
.event_types
.size
/ sizeof(struct perf_trace_event_type
);
527 perf_header__process_sections(self
, fd
, perf_file_section__process
);
529 lseek(fd
, self
->data_offset
, SEEK_SET
);
535 u64
perf_header__sample_type(struct perf_header
*header
)
540 for (i
= 0; i
< header
->attrs
; i
++) {
541 struct perf_header_attr
*attr
= header
->attr
[i
];
544 type
= attr
->attr
.sample_type
;
545 else if (type
!= attr
->attr
.sample_type
)
546 die("non matching sample_type");
552 struct perf_event_attr
*
553 perf_header__find_attr(u64 id
, struct perf_header
*header
)
557 for (i
= 0; i
< header
->attrs
; i
++) {
558 struct perf_header_attr
*attr
= header
->attr
[i
];
561 for (j
= 0; j
< attr
->ids
; j
++) {
562 if (attr
->id
[j
] == id
)