[PATCH V2] tools/perf/tests/shell/base_probe: Enhance print_overall_results to print summary information

[Athira Rajeev]

Currently print_overall_results prints the number of
fails in the summary, example from base_probe tests in
testsuite_probe:

 ## [ FAIL ] ## perf_probe :: test_invalid_options SUMMARY ::
	11 failures found

test_invalid_options contains multiple tests and out
of that 11 failed. Sometimes it could happen that it
is due to missing dependency in the build or environment
dependency.

Example, perf probe -L requires DWARF enabled. otherwise
it fails as below:
 ./perf probe -L
  Error: switch `L' is not available because NO_DWARF=1

"-L" is tested as one of the option in :
   for opt in '-a' '-d' '-L' '-V'; do
   <<perf probe test>>
   print_results $PERF_EXIT_CODE $CHECK_EXIT_CODE "missing argument
	for $opt"

Here -a and -d doesn't require DWARF. Similarly there
are few other tests requiring DWARF. To hint the user that
missing dwarf could be one issue, update print_overall_results
to print a comment string along with summary hinting the possible
cause. Update test_invalid_options.sh and test_line_semantics.sh
to pass the info about dwarf requirement since these tests
failed when perf is built without DWARF. Use the check for
presence of dwarf with "perf check feature" and append the
hint message based on the result.

With the change:
 ## [ FAIL ] ## perf_probe :: test_invalid_options SUMMARY ::
 11 failures found :: Some of the tests need DWARF to run

Signed-off-by: Athira Rajeev <atrajeev at linux.vnet.ibm.com>
---
Changelog:
 v1 -> v2:
 Check presence of dwarf using "perf check feature". Add
 failure hint message for dwarf based on this check

 tools/perf/tests/shell/base_probe/test_invalid_options.sh | 5 ++++-
 tools/perf/tests/shell/base_probe/test_line_semantics.sh  | 5 ++++-
 tools/perf/tests/shell/common/init.sh                     | 3 ++-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/shell/base_probe/test_invalid_options.sh b/tools/perf/tests/shell/base_probe/test_invalid_options.sh
index 1fedfd8b0d0d..c51d8d9bfdb7 100755
--- a/tools/perf/tests/shell/base_probe/test_invalid_options.sh
+++ b/tools/perf/tests/shell/base_probe/test_invalid_options.sh
@@ -22,6 +22,9 @@ if ! check_kprobes_available; then
 	exit 0
 fi
 
+# Check for presence of dwarf
+$CMD_PERF check feature -q dwarf
+[ $? -ne 0 ] && HINT_FAIL="Some of the tests need DWARF to run"
 
 ### missing argument
 
@@ -75,5 +78,5 @@ done
 
 
 # print overall results
-print_overall_results "$TEST_RESULT"
+print_overall_results "$TEST_RESULT" $HINT_FAIL
 exit $?
diff --git a/tools/perf/tests/shell/base_probe/test_line_semantics.sh b/tools/perf/tests/shell/base_probe/test_line_semantics.sh
index d8f4bde0f585..f5d3b6e8d0d6 100755
--- a/tools/perf/tests/shell/base_probe/test_line_semantics.sh
+++ b/tools/perf/tests/shell/base_probe/test_line_semantics.sh
@@ -23,6 +23,9 @@ if ! check_kprobes_available; then
 	exit 0
 fi
 
+# Check for presence of dwarf
+$CMD_PERF check feature -q dwarf
+[ $? -ne 0 ] && HINT_FAIL="Some of the tests need DWARF to run"
 
 ### acceptable --line descriptions
 
@@ -51,5 +54,5 @@ done
 
 
 # print overall results
-print_overall_results "$TEST_RESULT"
+print_overall_results "$TEST_RESULT" $HINT_FAIL
 exit $?
diff --git a/tools/perf/tests/shell/common/init.sh b/tools/perf/tests/shell/common/init.sh
index 075f17623c8e..0862cbc1c6f7 100644
--- a/tools/perf/tests/shell/common/init.sh
+++ b/tools/perf/tests/shell/common/init.sh
@@ -46,10 +46,11 @@ print_results()
 print_overall_results()
 {
 	RETVAL="$1"; shift
+	TASK_COMMENT="$*"
 	if [ $RETVAL -eq 0 ]; then
 		_echo "$MALLPASS## [ PASS ] ##$MEND $TEST_NAME :: $THIS_TEST_NAME SUMMARY"
 	else
-		_echo "$MALLFAIL## [ FAIL ] ##$MEND $TEST_NAME :: $THIS_TEST_NAME SUMMARY :: $RETVAL failures found"
+		_echo "$MALLFAIL## [ FAIL ] ##$MEND $TEST_NAME :: $THIS_TEST_NAME SUMMARY :: $RETVAL failures found :: $TASK_COMMENT"
 	fi
 	return $RETVAL
 }
-- 
2.43.5