tools/lib/lockdep/tests: Improve testing accuracy

Instead of checking whether the tests produced any output, check the
output itself. This patch avoids that e.g. debug output causes the
message "PASSED!" to be reported for failed tests.
Signed-off-by: NBart Van Assche <bvanassche@acm.org>
Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Waiman Long <longman@redhat.com>
Cc: johannes.berg@intel.com
Cc: tj@kernel.org
Link: https://lkml.kernel.org/r/20181207011148.251812-4-bvanassche@acm.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>

tools/lib/lockdep/run_tests.sh

@@ -11,7 +11,7 @@ find tests -name '*.c' | sort | while read -r i; do
 	testname=$(basename "$i" .c)
 	echo -ne "$testname... "
 	if gcc -o "tests/$testname" -pthread "$i" liblockdep.a -Iinclude -D__USE_LIBLOCKDEP &&
-		[ "$(timeout 1 "./tests/$testname" 2>&1 | wc -l)" -gt 0 ]; then
+		timeout 1 "tests/$testname" 2>&1 | "tests/${testname}.sh"; then
 		echo "PASSED!"
 	else
 		echo "FAILED!"
@@ -23,7 +23,8 @@ find tests -name '*.c' | sort | while read -r i; do
 	testname=$(basename "$i" .c)
 	echo -ne "(PRELOAD) $testname... "
 	if gcc -o "tests/$testname" -pthread -Iinclude "$i" &&
-		[ "$(timeout 1 ./lockdep "./tests/$testname" 2>&1 | wc -l)" -gt 0 ]; then
+		timeout 1 ./lockdep "tests/$testname" 2>&1 |
+		"tests/${testname}.sh"; then
 		echo "PASSED!"
 	else
 		echo "FAILED!"

tools/lib/lockdep/tests/AA.sh

+#!/bin/bash
+grep -q 'WARNING: possible recursive locking detected'

tools/lib/lockdep/tests/ABA.sh

+#!/bin/bash
+grep -q 'WARNING: possible recursive locking detected'

tools/lib/lockdep/tests/ABBA.sh

+#!/bin/bash
+grep -q 'WARNING: possible circular locking dependency detected'

tools/lib/lockdep/tests/ABBA_2threads.sh

+#!/bin/bash
+grep -q 'WARNING: possible circular locking dependency detected'

tools/lib/lockdep/tests/ABBCCA.sh

+#!/bin/bash
+grep -q 'WARNING: possible circular locking dependency detected'

tools/lib/lockdep/tests/ABBCCDDA.sh

+#!/bin/bash
+grep -q 'WARNING: possible circular locking dependency detected'

tools/lib/lockdep/tests/ABCABC.sh

+#!/bin/bash
+grep -q 'WARNING: possible circular locking dependency detected'

tools/lib/lockdep/tests/ABCDBCDA.sh

+#!/bin/bash
+grep -q 'WARNING: possible circular locking dependency detected'

tools/lib/lockdep/tests/ABCDBDDA.sh

+#!/bin/bash
+grep -q 'WARNING: possible circular locking dependency detected'

tools/lib/lockdep/tests/WW.sh

+#!/bin/bash
+grep -q 'WARNING: possible recursive locking detected'

tools/lib/lockdep/tests/unlock_balance.sh

+#!/bin/bash
+grep -q 'WARNING: bad unlock balance detected'