| /* |
| * Copyright (C) 2020 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. |
| */ |
| |
| package android.server.wm; |
| |
| import android.app.UiAutomation; |
| |
| import androidx.test.InstrumentationRegistry; |
| |
| /** |
| * Helper to run code that might end up with nested permission requirements (eg. TaskOrganizer). |
| */ |
| public class NestedShellPermission { |
| private static NestedShellPermission sInstance; |
| |
| private int mPermissionDepth = 0; |
| |
| private NestedShellPermission() {} |
| |
| synchronized private static NestedShellPermission getInstance() { |
| if (sInstance == null) { |
| sInstance = new NestedShellPermission(); |
| } |
| return sInstance; |
| } |
| |
| /** |
| * Similar to SystemUtil.runWithShellPermissionIdentity except it supports nesting. Use this |
| * with anything that interacts with TestTaskOrganizer since async operations are common. |
| */ |
| public static void run(Runnable action) { |
| final NestedShellPermission self = getInstance(); |
| final UiAutomation automan = |
| InstrumentationRegistry.getInstrumentation().getUiAutomation(); |
| synchronized (self) { |
| if (0 == self.mPermissionDepth++) { |
| automan.adoptShellPermissionIdentity(); |
| } |
| } |
| try { |
| action.run(); |
| } finally { |
| synchronized (self) { |
| if (0 == --self.mPermissionDepth) { |
| automan.dropShellPermissionIdentity(); |
| } |
| } |
| } |
| } |
| } |