perf test: Skip data_type_profiling when the PMU cannot record memory events

The test's only guard matches "failed: no PMU supports the memory
events", but a PMU that has memory events and refuses them per-thread,
such as AMD IBS on kernels without the swfilt filter, falls through:
the script runs under 'set -e' and the bare 'perf mem record' aborts it
through the EXIT trap, reporting a signal that never happened and
turning "this PMU cannot record these events" into a test failure.

Skip when a trivial per-thread 'perf mem record' fails, and put the
record and annotate calls in the condition of an 'if', where 'set -e'
leaves them alone, so the remaining cases report their own failures
instead of the first one aborting the run.

Fixes: f60a5c22967b ("perf tests: Test annotate with data type profiling and rust")
Acked-by: Namhyung Kim <namhyung@kernel.org>
Assisted-by: LLM
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 36 insertions, 10 deletions

diff --git a/tools/perf/tests/shell/data_type_profiling.sh b/tools/perf/tests/shell/data_type_profiling.sh
index eca694600a04..a916c410274a 100755
--- a/tools/perf/tests/shell/data_type_profiling.sh
+++ b/tools/perf/tests/shell/data_type_profiling.sh
@@ -19,6 +19,15 @@ perfout=$(mktemp /tmp/__perf_test.perf.out.XXXXX)
 perf mem record -o /dev/null -- true  2>&1 | \
   		grep -q "failed: no PMU supports the memory events" && exit 2
 
+# Skip if per-thread mem record is not supported on this PMU (e.g. AMD IBS
+# needs system-wide '-a'): it is what the test records with below, and a
+# failing record must not be reported as a test failure.
+if ! perf mem record -o /dev/null -- true 2>/dev/null
+then
+  echo "Skip: cannot record memory events on this PMU"
+  exit 2
+fi
+
 cleanup() {
   rm -rf "${perfdata}" "${perfout}"
   rm -rf "${perfdata}".old
@@ -52,25 +61,42 @@ test_basic_annotate() {
     index=1 ;;
   esac
 
+  # Under 'set -e' a bare failing command aborts the script through the EXIT
+  # trap, so the commands that report a failure have to be the condition of
+  # an 'if' for that reporting to ever happen.
   if [ "x${mode}" == "xBasic" ]
   then
-    perf mem record -o "${perfdata}" ${testprogs[$index]} 2> /dev/null
+    if ! perf mem record -o "${perfdata}" ${testprogs[$index]} 2> /dev/null
+    then
+      echo "${mode} annotate [Failed: perf record]"
+      err=1
+      return
+    fi
   else
-    perf mem record -o - ${testprogs[$index]} 2> /dev/null > "${perfdata}"
-  fi
-  if [ "x$?" != "x0" ]
-  then
-    echo "${mode} annotate [Failed: perf record]"
-    err=1
-    return
+    if ! perf mem record -o - ${testprogs[$index]} 2> /dev/null > "${perfdata}"
+    then
+      echo "${mode} annotate [Failed: perf record]"
+      err=1
+      return
+    fi
   fi
 
   # Generate the annotated output file
   if [ "x${mode}" == "xBasic" ]
   then
-    perf annotate --code-with-type -i "${perfdata}" --stdio --percent-limit 1 2> /dev/null > "${perfout}"
+    if ! perf annotate --code-with-type -i "${perfdata}" --stdio --percent-limit 1 2> /dev/null > "${perfout}"
+    then
+      echo "${mode} annotate [Failed: perf annotate]"
+      err=1
+      return
+    fi
   else
-    perf annotate --code-with-type -i - --stdio 2> /dev/null --percent-limit 1 < "${perfdata}" > "${perfout}"
+    if ! perf annotate --code-with-type -i - --stdio 2> /dev/null --percent-limit 1 < "${perfdata}" > "${perfout}"
+    then
+      echo "${mode} annotate [Failed: perf annotate]"
+      err=1
+      return
+    fi
   fi
 
   # check if it has the target data type