perf test: Ignore security failures in all PMU test

Refactor code to have some more error diagnosis on traps, etc. and to
do less work on each line. Add an ignore situation for security failures.

Signed-off-by: Ian Rogers <[email protected]>
Cc: Colin Ian King <[email protected]>
Cc: Athira Jajeev <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>

tools/perf/tests/shell/stat_all_pmu.sh

@@ -1,23 +1,51 @@
-#!/bin/sh
+#!/bin/bash
 # perf all PMU test
 # SPDX-License-Identifier: GPL-2.0
 
 set -e
+err=0
+result=""
+
+trap_cleanup() {
+  echo "Unexpected signal in ${FUNCNAME[1]}"
+  echo "$result"
+  exit 1
+}
+trap trap_cleanup EXIT TERM INT
 
 # Test all PMU events; however exclude parameterized ones (name contains '?')
-for p in $(perf list --raw-dump pmu | sed 's/[[:graph:]]\+?[[:graph:]]\+[[:space:]]//g'); do
+for p in $(perf list --raw-dump pmu | sed 's/[[:graph:]]\+?[[:graph:]]\+[[:space:]]//g')
+do
   echo "Testing $p"
   result=$(perf stat -e "$p" true 2>&1)
-  if ! echo "$result" | grep -q "$p" && ! echo "$result" | grep -q "<not supported>" ; then
-    # We failed to see the event and it is supported. Possibly the workload was
-    # too small so retry with something longer.
-    result=$(perf stat -e "$p" perf bench internals synthesize 2>&1)
-    if ! echo "$result" | grep -q "$p" ; then
-      echo "Event '$p' not printed in:"
-      echo "$result"
-      exit 1
-    fi
+  if echo "$result" | grep -q "$p"
+  then
+    # Event seen in output.
+    continue
   fi
+  if echo "$result" | grep -q "<not supported>"
+  then
+    # Event not supported, so ignore.
+    continue
+  fi
+  if echo "$result" | grep -q "Access to performance monitoring and observability operations is limited."
+  then
+    # Access is limited, so ignore.
+    continue
+  fi
+
+  # We failed to see the event and it is supported. Possibly the workload was
+  # too small so retry with something longer.
+  result=$(perf stat -e "$p" perf bench internals synthesize 2>&1)
+  if echo "$result" | grep -q "$p"
+  then
+    # Event seen in output.
+    continue
+  fi
+  echo "Error: event '$p' not printed in:"
+  echo "$result"
+  err=1
 done
 
-exit 0
+trap - EXIT TERM INT
+exit $err