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perf: Convert perf header build_ids into build_id events

Browse source 
Bypasses the build_id perf header code and replaces it with a
synthesized event and processing function that accomplishes the
same thing, used when reading/writing perf data to/from a pipe.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: k-keiichi@bx.jp.nec.com
Cc: acme@ghostprotocols.net
LKML-Reference: <1270184365-8281-9-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tom Zanussi 2010-04-01 23:59:22 -05:00 committed by Ingo Molnar
parent 9215545e99
commit c7929e4727
8 changed files with 121 additions and 4 deletions
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15
tools/perf/builtin-record.c
View file

@ -426,10 +426,19 @@ static int process_buildids(void)
static void atexit_header(void)
{
session->header.data_size += bytes_written;
if (!pipe_output) {
session->header.data_size += bytes_written;
process_buildids();
perf_header__write(&session->header, output, true);
process_buildids();
perf_header__write(&session->header, output, true);
} else {
int err;
err = event__synthesize_build_ids(process_synthesized_event,
session);
if (err < 0)
pr_err("Couldn't synthesize build ids.\n");
}
}
static int __cmd_record(int argc, const char **argv)

1
tools/perf/builtin-report.c
View file

@ -270,6 +270,7 @@ static struct perf_event_ops event_ops = {
.attr = event__process_attr,
.event_type = event__process_event_type,
.tracing_data = event__process_tracing_data,
.build_id = event__process_build_id,
};
extern volatile int session_done;

1
tools/perf/builtin-trace.c
View file

@ -107,6 +107,7 @@ static struct perf_event_ops event_ops = {
.attr = event__process_attr,
.event_type = event__process_event_type,
.tracing_data = event__process_tracing_data,
.build_id = event__process_build_id,
};
extern volatile int session_done;

2
tools/perf/util/event.h
View file

@ -87,6 +87,7 @@ enum perf_header_event_type { /* above any possible kernel type */
PERF_RECORD_HEADER_ATTR = 64,
PERF_RECORD_HEADER_EVENT_TYPE = 65,
PERF_RECORD_HEADER_TRACING_DATA = 66,
PERF_RECORD_HEADER_BUILD_ID = 67,
PERF_RECORD_HEADER_MAX
};
@ -125,6 +126,7 @@ typedef union event_union {
struct attr_event attr;
struct event_type_event event_type;
struct tracing_data_event tracing_data;
struct build_id_event build_id;
} event_t;
struct events_stats {

90
tools/perf/util/header.c
View file

@ -986,3 +986,93 @@ int event__process_tracing_data(event_t *self,
return size_read + padding;
}
int event__synthesize_build_id(struct dso *pos, u16 misc,
event__handler_t process,
struct perf_session *session)
{
event_t ev;
size_t len;
int err = 0;
if (!pos->hit)
return err;
memset(&ev, 0, sizeof(ev));
len = pos->long_name_len + 1;
len = ALIGN(len, NAME_ALIGN);
memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
ev.build_id.header.misc = misc;
ev.build_id.header.size = sizeof(ev.build_id) + len;
memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len);
err = process(&ev, session);
return err;
}
static int __event_synthesize_build_ids(struct list_head *head, u16 misc,
event__handler_t process,
struct perf_session *session)
{
struct dso *pos;
dsos__for_each_with_build_id(pos, head) {
int err;
if (!pos->hit)
continue;
err = event__synthesize_build_id(pos, misc, process, session);
if (err < 0)
return err;
}
return 0;
}
int event__synthesize_build_ids(event__handler_t process,
struct perf_session *session)
{
int err;
if (!dsos__read_build_ids(true))
return 0;
err = __event_synthesize_build_ids(&dsos__kernel,
PERF_RECORD_MISC_KERNEL,
process, session);
if (err == 0)
err = __event_synthesize_build_ids(&dsos__user,
PERF_RECORD_MISC_USER,
process, session);
if (err < 0) {
pr_debug("failed to synthesize build ids\n");
return err;
}
dsos__cache_build_ids();
return 0;
}
int event__process_build_id(event_t *self,
struct perf_session *session __unused)
{
struct list_head *head = &dsos__user;
struct dso *dso;
if (self->build_id.header.misc & PERF_RECORD_MISC_KERNEL)
head = &dsos__kernel;
dso = __dsos__findnew(head, self->build_id.filename);
if (dso != NULL) {
dso__set_build_id(dso, &self->build_id.build_id);
if (head == &dsos__kernel && self->build_id.filename[0] == '[')
dso->kernel = 1;
}
return 0;
}

7
tools/perf/util/header.h
View file

@ -118,4 +118,11 @@ int event__synthesize_tracing_data(int fd, struct perf_event_attr *pattrs,
int event__process_tracing_data(event_t *self,
struct perf_session *session);
int event__synthesize_build_id(struct dso *pos, u16 misc,
event__handler_t process,
struct perf_session *session);
int event__synthesize_build_ids(event__handler_t process,
struct perf_session *session);
int event__process_build_id(event_t *self, struct perf_session *session);
#endif /* __PERF_HEADER_H */

6
tools/perf/util/session.c
View file

@ -206,6 +206,8 @@ static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
handler->event_type = process_event_stub;
if (handler->tracing_data == NULL)
handler->tracing_data = process_event_stub;
if (handler->build_id == NULL)
handler->build_id = process_event_stub;
}
static const char *event__name[] = {
@ -222,6 +224,7 @@ static const char *event__name[] = {
[PERF_RECORD_HEADER_ATTR] = "ATTR",
[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
[PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID",
};
unsigned long event__total[PERF_RECORD_HEADER_MAX];
@ -332,6 +335,7 @@ static event__swap_op event__swap_ops[] = {
[PERF_RECORD_HEADER_ATTR] = event__attr_swap,
[PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap,
[PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap,
[PERF_RECORD_HEADER_BUILD_ID] = NULL,
[PERF_RECORD_HEADER_MAX] = NULL,
};
@ -380,6 +384,8 @@ static int perf_session__process_event(struct perf_session *self,
/* setup for reading amidst mmap */
lseek(self->fd, offset + head, SEEK_SET);
return ops->tracing_data(event, self);
case PERF_RECORD_HEADER_BUILD_ID:
return ops->build_id(event, self);
default:
self->unknown_events++;
return -1;

3
tools/perf/util/session.h
View file

@ -47,7 +47,8 @@ struct perf_event_ops {
unthrottle,
attr,
event_type,
tracing_data;
tracing_data,
build_id;
};
struct perf_session *perf_session__new(const char *filename, int mode, bool force);