1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.security.cts; 17 18 import com.android.tradefed.device.ITestDevice; 19 import com.android.tradefed.device.DeviceNotAvailableException; 20 import com.android.tradefed.testtype.DeviceTestCase; 21 22 public class PerfEventParanoidTest extends DeviceTestCase { 23 24 /** 25 * a reference to the device under test. 26 */ 27 private ITestDevice mDevice; 28 29 private static final String PERF_EVENT_PARANOID_PATH = "/proc/sys/kernel/perf_event_paranoid"; 30 31 @Override 32 protected void setUp() throws Exception { 33 super.setUp(); 34 mDevice = getDevice(); 35 } 36 37 public void testPerfEventRestricted() throws DeviceNotAvailableException { 38 String cmd = "cat " + PERF_EVENT_PARANOID_PATH; 39 String output = mDevice.executeShellCommand(cmd); 40 assertTrue("\n/proc/sys/kernel/perf_event_paranoid=3 is required.\n" 41 + "Please add CONFIG_SECURITY_PERF_EVENTS_RESTRICT=y\n" 42 + "to your device kernel's defconfig and apply the\n" 43 + "appropriate patches for your kernel located here:\n" 44 + "https://android-review.googlesource.com/#/q/topic:CONFIG_SECURITY_PERF_EVENTS_RESTRICT", 45 output.equals("3\n")); 46 } 47 } 48
