perf session: Parse sample earlier

At perf_session__process_event, so that we reduce the number of lines in eache
tool sample processing routine that now receives a sample_data pointer already
parsed.

This will also be useful in the next patch, where we'll allow sample the
identity fields in MMAP, FORK, EXIT, etc, when it will be possible to see (cpu,
timestamp) just after before every event.

Also validate callchains in perf_session__process_event, i.e. as early as
possible, and keep a counter of the number of events discarded due to invalid
callchains, warning the user about it if it happens.

There is an assumption that was kept that all events have the same sample_type,
that will be dealt with in the future, when this preexisting limitation will be
removed.

Tested-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <1291318772-30880-4-git-send-email-acme@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 24 insertions, 15 deletions

diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 8e3e47b..4b66b85 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -16,8 +16,8 @@
 static char		const *input_name = "-";
 static bool		inject_build_ids;
 
-static int event__repipe(event_t *event __used,
-			 struct perf_session *session __used)
+static int event__repipe_synth(event_t *event,
+			       struct perf_session *session __used)
 {
 	uint32_t size;
 	void *buf = event;
@@ -36,22 +36,30 @@ static int event__repipe(event_t *event __used,
 	return 0;
 }
 
-static int event__repipe_mmap(event_t *self, struct perf_session *session)
+static int event__repipe(event_t *event, struct sample_data *sample __used,
+			 struct perf_session *session)
+{
+	return event__repipe_synth(event, session);
+}
+
+static int event__repipe_mmap(event_t *self, struct sample_data *sample,
+			      struct perf_session *session)
 {
 	int err;
 
-	err = event__process_mmap(self, session);
-	event__repipe(self, session);
+	err = event__process_mmap(self, sample, session);
+	event__repipe(self, sample, session);
 
 	return err;
 }
 
-static int event__repipe_task(event_t *self, struct perf_session *session)
+static int event__repipe_task(event_t *self, struct sample_data *sample,
+			      struct perf_session *session)
 {
 	int err;
 
-	err = event__process_task(self, session);
-	event__repipe(self, session);
+	err = event__process_task(self, sample, session);
+	event__repipe(self, sample, session);
 
 	return err;
 }
@@ -61,7 +69,7 @@ static int event__repipe_tracing_data(event_t *self,
 {
 	int err;
 
-	event__repipe(self, session);
+	event__repipe_synth(self, session);
 	err = event__process_tracing_data(self, session);
 
 	return err;
@@ -111,7 +119,8 @@ static int dso__inject_build_id(struct dso *self, struct perf_session *session)
 	return 0;
 }
 
-static int event__inject_buildid(event_t *event, struct perf_session *session)
+static int event__inject_buildid(event_t *event, struct sample_data *sample,
+				 struct perf_session *session)
 {
 	struct addr_location al;
 	struct thread *thread;
@@ -146,7 +155,7 @@ static int event__inject_buildid(event_t *event, struct perf_session *session)
 	}
 
 repipe:
-	event__repipe(event, session);
+	event__repipe(event, sample, session);
 	return 0;
 }
 
@@ -160,10 +169,10 @@ struct perf_event_ops inject_ops = {
 	.read		= event__repipe,
 	.throttle	= event__repipe,
 	.unthrottle	= event__repipe,
-	.attr		= event__repipe,
-	.event_type 	= event__repipe,
-	.tracing_data 	= event__repipe,
-	.build_id 	= event__repipe,
+	.attr		= event__repipe_synth,
+	.event_type 	= event__repipe_synth,
+	.tracing_data 	= event__repipe_synth,
+	.build_id 	= event__repipe_synth,
 };
 
 extern volatile int session_done;