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perf: Convert perf header build_ids into build_id events

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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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90
tools/perf/util/header.c
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@@ -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;
}