[PATCH v2 03/14] perf cs-etm: Break branch history when instruction memory is unavailable

[Leo Yan]

The decoder currently ignores OCSD_GEN_TRC_ELEM_ADDR_NACC, allowing a
subsequent range to be paired with stale branch history from before the
unreadable code.

Treat an inaccessible instruction address as a discontinuity and flush
the pending range and branch history before processing subsequent
elements.

Assisted-by: Codex:gpt-6
Signed-off-by: Leo Yan <leo.yan at arm.com>
---
 tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
index 26940f1f1b0bf44c8671d80020597c672c361c1a..35ca1a23e12735416d0d412a949595efc5bfe50a 100644
--- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
+++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c
@@ -594,7 +594,8 @@ static ocsd_datapath_resp_t cs_etm_decoder__gen_trace_elem_printer(
 
 	if (type == OCSD_GEN_TRC_ELEM_EO_TRACE ||
 	    type == OCSD_GEN_TRC_ELEM_NO_SYNC ||
-	    type == OCSD_GEN_TRC_ELEM_TRACE_ON)
+	    type == OCSD_GEN_TRC_ELEM_TRACE_ON ||
+	    type == OCSD_GEN_TRC_ELEM_ADDR_NACC)
 		resp = cs_etm_decoder__buffer_discontinuity(etmq, packet_queue,
 							    trace_chan_id);
 	else if (type == OCSD_GEN_TRC_ELEM_INSTR_RANGE)

-- 
2.34.1