[PATCH 3/7] perf cs-etm: Save aux records in each etm queue

[James Clark]

The aux records will be used set the bounds of decoding in a
later commit. In the future we may also want to use the flags
of each record to control decoding.

Do these need to be saved in their entirety, or can pointers
to each record safely be saved instead for later access?

Signed-off-by: James Clark <james.clark at arm.com>
---
 tools/perf/util/cs-etm.c | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index 8f8b448632fb..88b541b2a804 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -92,12 +92,16 @@ struct cs_etm_queue {
 	/* Conversion between traceID and index in traceid_queues array */
 	struct intlist *traceid_queues_list;
 	struct cs_etm_traceid_queue **traceid_queues;
+	int aux_record_list_len;
+	int aux_record_list_idx;
+	struct perf_record_aux *aux_record_list;
 };
 
 /* RB tree for quick conversion between traceID and metadata pointers */
 static struct intlist *traceid_list;
 
-static int cs_etm__update_queues(struct cs_etm_auxtrace *etm, int cpu);
+static int cs_etm__update_queues(struct cs_etm_auxtrace *etm, int cpu,
+				 struct perf_record_aux *aux_record);
 static int cs_etm__process_queues(struct cs_etm_auxtrace *etm);
 static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm,
 					   pid_t tid);
@@ -585,6 +589,7 @@ static void cs_etm__free_queue(void *priv)
 
 	cs_etm_decoder__free(etmq->decoder);
 	cs_etm__free_traceid_queues(etmq);
+	free(etmq->aux_record_list);
 	free(etmq);
 }
 
@@ -759,6 +764,19 @@ static struct cs_etm_queue *cs_etm__alloc_queue(struct cs_etm_auxtrace *etm)
 	return NULL;
 }
 
+static int cs_etm__save_aux_record(struct cs_etm_queue *etmq,
+				   struct perf_record_aux *aux_record)
+{
+	etmq->aux_record_list = reallocarray(etmq->aux_record_list,
+					      etmq->aux_record_list_len+1,
+					      sizeof(*etmq->aux_record_list));
+	if (!etmq->aux_record_list)
+		return -ENOMEM;
+
+	etmq->aux_record_list[etmq->aux_record_list_len++] = *aux_record;
+	return 0;
+}
+
 static int cs_etm__search_first_timestamp(struct cs_etm_queue *etmq)
 {
 	int ret = 0;
@@ -865,7 +883,7 @@ static int cs_etm__setup_queues(struct cs_etm_auxtrace *etm)
 	return 0;
 }
 
-static int cs_etm__update_queues(struct cs_etm_auxtrace *etm, int cpu)
+static int cs_etm__update_queues(struct cs_etm_auxtrace *etm, int cpu, struct perf_record_aux *aux)
 {
 	int ret;
 	if (etm->queues.new_data) {
@@ -875,6 +893,14 @@ static int cs_etm__update_queues(struct cs_etm_auxtrace *etm, int cpu)
 			return ret;
 	}
 
+	/* In timeless mode, cpu is set to -1, and a single aux buffer is filled */
+	if (cpu < 0)
+		cpu = 0;
+
+	ret = cs_etm__save_aux_record(etm->queues.queue_array[cpu].priv, aux);
+	if (ret)
+		return ret;
+
 	if (!etm->timeless_decoding)
 		return cs_etm__search_first_timestamp(etm->queues.queue_array[cpu].priv);
 	else
@@ -2357,7 +2383,7 @@ static int cs_etm__process_event(struct perf_session *session,
 
 	if ((timestamp || etm->timeless_decoding)
 			&& event->header.type == PERF_RECORD_AUX) {
-		err = cs_etm__update_queues(etm, sample->cpu);
+		err = cs_etm__update_queues(etm, sample->cpu, &event->aux);
 		if (err)
 			return err;
 	}
-- 
2.28.0