1 files changed, 47 insertions, 0 deletions
diff --git a/test/cts/perfetto_device_preparer.sh b/test/cts/perfetto_device_preparer.sh
new file mode 100644
index 000000000..407cbdec3
--- /dev/null
+++ b/test/cts/perfetto_device_preparer.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+#
+# Copyright 2023 - The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Setups the device before running perfetto tests. Recovers the state after the
+# tests are done. The setup and the tead-down phases are distinguished via the
+# first argument: [setup|teardown].
+
+if [ "$1" != setup -a "$1" != teardown ]; then
+    echo "Usage: $0 [setup|teardown]"
+    exit 1
+fi
+
+# Only force persist.traced.enable=1 on automotive as other form factors
+# might have to have traced enabled by default per the CDD.
+if ! getprop ro.build.characteristics | grep -q automotive; then
+    exit 0
+fi
+
+# b/285215697: Set the persist.traced.enable during the test.
+PROP=persist.traced.enable
+SAVED=/data/local/tests/persist.traced.enable.saved
+if [ "$1" = setup ]; then
+    if [ -n "$(getprop ${PROP})" ]; then
+        getprop ${PROP} > ${SAVED}
+    fi
+    setprop ${PROP} "1"
+elif [ "$1" = teardown ]; then
+    if [ -e ${SAVED} ]; then
+        setprop ${PROP} $(cat ${SAVED})
+        rm ${SAVED}
+    else
+        setprop ${PROP} ""
+    fi
+fi