perf: Convert perf header build_ids into build_id events
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>
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index c6874ec..628173b 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -986,3 +986,93 @@
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;
+}