perf test: Add stat test for record and script

When using the global aggregation mode, running perf script after perf
stat record can result in a segmentation fault as seen with commit
8b76a31 ("perf stat: Remove unused perf_counts.aggr field").

Add a basic test to the existing suite of stat-related tests for
checking if that workflow runs without erroring out.

Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Link: https://lore.kernel.org/r/6a5429879764e3dac984cbb11ee2d95cc1604161.1683280603.git.sandipan.das@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

Author: sandip4n

tools/perf/tests/shell/stat.sh

@@ -28,6 +28,18 @@ test_stat_record_report() {
   echo "stat record and report test [Success]"
 }
 
+test_stat_record_script() {
+  echo "stat record and script test"
+  if ! perf stat record -o - true | perf script -i - 2>&1 | \
+    grep -E -q "CPU[[:space:]]+THREAD[[:space:]]+VAL[[:space:]]+ENA[[:space:]]+RUN[[:space:]]+TIME[[:space:]]+EVENT"
+  then
+    echo "stat record and script test [Failed]"
+    err=1
+    return
+  fi
+  echo "stat record and script test [Success]"
+}
+
 test_stat_repeat_weak_groups() {
   echo "stat repeat weak groups test"
   if ! perf stat -e '{cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles,cycles}' \
@@ -93,6 +105,7 @@ test_topdown_weak_groups() {
 
 test_default_stat
 test_stat_record_report
+test_stat_record_script
 test_stat_repeat_weak_groups
 test_topdown_groups
 test_topdown_weak_groups