[PATCH 2/5] perf test java symbol: Get rid of shellcheck warnings

[Ilya Leoshkevich]

Add missing quotes and suppress the $? warnings.

Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
---
 tools/perf/tests/shell/test_java_symbol.sh | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/tools/perf/tests/shell/test_java_symbol.sh b/tools/perf/tests/shell/test_java_symbol.sh
index 499539d1c4794..b1d7cd43af01a 100755
--- a/tools/perf/tests/shell/test_java_symbol.sh
+++ b/tools/perf/tests/shell/test_java_symbol.sh
@@ -4,6 +4,9 @@
 # SPDX-License-Identifier: GPL-2.0
 # Leo Yan <leo.yan@xxxxxxxxxx>, 2022
 
+# Allow [ $? -ne 0 ], because long commands look ugly in if statements.
+# shellcheck disable=SC2181
+
 # skip if there's no jshell
 if ! [ -x "$(command -v jshell)" ]; then
 	echo "skip: no jshell, install JDK"
@@ -13,11 +16,12 @@ fi
 PERF_DATA=$(mktemp /tmp/__perf_test.perf.data.XXXXX)
 PERF_INJ_DATA=$(mktemp /tmp/__perf_test.perf.data.inj.XXXXX)
 
-cleanup_files()
-{
+# Shellcheck does not understand that this function is used by a trap.
+# shellcheck disable=SC2317
+cleanup_files() {
 	echo "Cleaning up files..."
-	rm -f ${PERF_DATA}
-	rm -f ${PERF_INJ_DATA}
+	rm -f "$PERF_DATA"
+	rm -f "$PERF_INJ_DATA"
 }
 
 trap cleanup_files exit term int
@@ -38,7 +42,7 @@ else
 	exit 2
 fi
 
-cat <<EOF | perf record -k 1 -o $PERF_DATA jshell -s -J-agentpath:$LIBJVMTI
+cat <<EOF | perf record -k 1 -o "$PERF_DATA" jshell -s -J"-agentpath:$LIBJVMTI"
 int fib(int x) {
 	return x > 1 ? fib(x - 2) + fib(x - 1) : 1;
 }
@@ -56,7 +60,7 @@ if [ $? -ne 0 ]; then
 	exit 1
 fi
 
-if ! DEBUGINFOD_URLS='' perf inject -i $PERF_DATA -o $PERF_INJ_DATA -j; then
+if ! DEBUGINFOD_URLS='' perf inject -i "$PERF_DATA" -o "$PERF_INJ_DATA" -j; then
 	echo "Fail to inject samples"
 	exit 1
 fi
@@ -64,8 +68,8 @@ fi
 # Below is an example of the instruction samples reporting:
 #   8.18%  jshell           jitted-50116-29.so    [.] Interpreter
 #   0.75%  Thread-1         jitted-83602-1670.so  [.] jdk.internal.jimage.BasicImageReader.getString(int)
-perf report --stdio -i ${PERF_INJ_DATA} 2>&1 | \
-	grep -E " +[0-9]+\.[0-9]+% .* (Interpreter|jdk\.internal).*" > /dev/null 2>&1
+perf report --stdio -i "$PERF_INJ_DATA" 2>&1 |
+	grep -E " +[0-9]+\.[0-9]+% .* (Interpreter|jdk\.internal).*" >/dev/null 2>&1
 
 if [ $? -ne 0 ]; then
 	echo "Fail to find java symbols"
-- 
2.51.1