1 /* 2 * Copyright (C) 2006 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 17 package android.app; 18 19 import android.os.Trace; 20 import android.util.ArrayMap; 21 import com.android.internal.os.PathClassLoaderFactory; 22 import dalvik.system.PathClassLoader; 23 24 class ApplicationLoaders { getDefault()25 public static ApplicationLoaders getDefault() { 26 return gApplicationLoaders; 27 } 28 getClassLoader(String zip, int targetSdkVersion, boolean isBundled, String librarySearchPath, String libraryPermittedPath, ClassLoader parent)29 public ClassLoader getClassLoader(String zip, int targetSdkVersion, boolean isBundled, 30 String librarySearchPath, String libraryPermittedPath, 31 ClassLoader parent) { 32 /* 33 * This is the parent we use if they pass "null" in. In theory 34 * this should be the "system" class loader; in practice we 35 * don't use that and can happily (and more efficiently) use the 36 * bootstrap class loader. 37 */ 38 ClassLoader baseParent = ClassLoader.getSystemClassLoader().getParent(); 39 40 synchronized (mLoaders) { 41 if (parent == null) { 42 parent = baseParent; 43 } 44 45 /* 46 * If we're one step up from the base class loader, find 47 * something in our cache. Otherwise, we create a whole 48 * new ClassLoader for the zip archive. 49 */ 50 if (parent == baseParent) { 51 ClassLoader loader = mLoaders.get(zip); 52 if (loader != null) { 53 return loader; 54 } 55 56 Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, zip); 57 58 PathClassLoader pathClassloader = PathClassLoaderFactory.createClassLoader( 59 zip, 60 librarySearchPath, 61 libraryPermittedPath, 62 parent, 63 targetSdkVersion, 64 isBundled); 65 66 Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER); 67 68 Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "setupVulkanLayerPath"); 69 setupVulkanLayerPath(pathClassloader, librarySearchPath); 70 Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER); 71 72 mLoaders.put(zip, pathClassloader); 73 return pathClassloader; 74 } 75 76 Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, zip); 77 PathClassLoader pathClassloader = new PathClassLoader(zip, parent); 78 Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER); 79 return pathClassloader; 80 } 81 } 82 setupVulkanLayerPath(ClassLoader classLoader, String librarySearchPath)83 private static native void setupVulkanLayerPath(ClassLoader classLoader, String librarySearchPath); 84 85 /** 86 * Adds a new path the classpath of the given loader. 87 * @throws IllegalStateException if the provided class loader is not a {@link PathClassLoader}. 88 */ addPath(ClassLoader classLoader, String dexPath)89 void addPath(ClassLoader classLoader, String dexPath) { 90 if (!(classLoader instanceof PathClassLoader)) { 91 throw new IllegalStateException("class loader is not a PathClassLoader"); 92 } 93 final PathClassLoader baseDexClassLoader = (PathClassLoader) classLoader; 94 baseDexClassLoader.addDexPath(dexPath); 95 } 96 97 private final ArrayMap<String, ClassLoader> mLoaders = new ArrayMap<String, ClassLoader>(); 98 99 private static final ApplicationLoaders gApplicationLoaders = new ApplicationLoaders(); 100 } 101