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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.minting; | 5 package org.chromium.minting; |
6 | 6 |
7 import android.app.Application; | 7 import android.app.Application; |
8 import android.content.Context; | 8 import android.content.Context; |
9 import android.content.pm.PackageManager.NameNotFoundException; | 9 import android.content.pm.PackageManager.NameNotFoundException; |
10 import android.util.Log; | 10 import android.util.Log; |
11 | 11 |
12 import java.io.File; | |
13 import java.lang.reflect.Array; | 12 import java.lang.reflect.Array; |
14 import java.lang.reflect.Field; | 13 import java.util.List; |
15 | 14 |
16 /** | 15 /** |
17 * Example application for a minted APK. | 16 * Example application for a minted APK. |
18 */ | 17 */ |
19 public class MintingApplication extends Application { | 18 public class MintingApplication extends Application { |
20 static final String CHROME_PACKAGE_PREF = "CHROME_PACKAGE_PREF"; | 19 static final String CHROME_PACKAGE_PREF = "CHROME_PACKAGE_PREF"; |
21 static final String MINT_PREFS = "MINT_PREFS"; | 20 static final String MINT_PREFS = "MINT_PREFS"; |
22 static final String DEFAULT_CHROME_PACKAGE_NAME = "com.google.android.apps.c hrome"; | 21 static final String DEFAULT_CHROME_PACKAGE_NAME = "com.google.android.apps.c hrome"; |
23 | 22 |
24 // Context of Chrome. | 23 // Context of Chrome. |
25 private Context mRemoteContext = null; | 24 private Context mRemoteContext = null; |
26 | 25 |
27 private static final String TAG = "cr.MintingApplication"; | 26 private static final String TAG = "cr.MintingApplication"; |
28 private static final String SECONDARY_FOLDER_NAME = "code_cache" + File.sepa rator | |
29 + "secondary-dexes"; | |
30 | |
31 private static Field findField(Object instance, String name) throws NoSuchFi eldException { | |
32 for (Class<?> clazz = instance.getClass(); clazz != null; clazz = clazz. getSuperclass()) { | |
33 try { | |
34 Field field = clazz.getDeclaredField(name); | |
35 if (!field.isAccessible()) { | |
36 field.setAccessible(true); | |
37 } | |
38 return field; | |
39 } catch (NoSuchFieldException e) { | |
40 // ignore and search next | |
41 } | |
42 } | |
43 throw new NoSuchFieldException("Field " + name + " not found in " + inst ance.getClass()); | |
44 } | |
45 | |
46 /** | 27 /** |
47 * Copy all the objects from a specified field of the second instance to the same field of the | 28 * Copy all the objects from a specified field of the hostInstance to the sa me field of the |
48 * first instance. As a result, the given field of the first instance will c ontain all the | 29 * mintInstance. As a result, the given field of the mintInstance will conta in all the |
49 * objects from both instances. | 30 * objects from both instances. |
50 * @param instance the first instance which contains a field of the given fi eldName. | 31 * @param mintInstance the first instance which contains a field of the give n fieldName. |
51 * @param fieldName the name of field to expand to an Object array. | 32 * @param fieldName the name of field to expand to an Object array. |
52 * @param instance2 the second instance which has a field of the given field Name. | 33 * @param hostInstance the second instance which has a field of the given fi eldName. |
53 * @throws NoSuchFieldException | 34 * @throws NoSuchFieldException |
54 * @throws IllegalArgumentException | 35 * @throws IllegalArgumentException |
55 * @throws IllegalAccessException | 36 * @throws IllegalAccessException |
56 */ | 37 */ |
57 private static void expandFieldArray(Object instance, String fieldName, | 38 private static void expandField(Object mintInstance, String fieldName, Objec t hostInstance) |
58 Object instance2) throws NoSuchFieldException, IllegalArgumentExcept ion, | 39 throws NoSuchFieldException, IllegalArgumentException, |
59 IllegalAccessException { | 40 IllegalAccessException { |
60 Field jlrField = findField(instance, fieldName); | 41 try { |
61 Object[] original = (Object[]) jlrField.get(instance); | 42 Object hostCurrentDirs = Reflect.getField(hostInstance, fieldName); |
62 Object[] additional = (Object[]) jlrField.get(instance2); | 43 Object mintCurrentDirs = Reflect.getField(mintInstance, fieldName); |
63 Object[] combined = (Object[]) Array.newInstance( | 44 // Switched from an array to an ArrayList in Lollipop. |
64 original.getClass().getComponentType(), original.length + additi onal.length); | 45 if (mintCurrentDirs instanceof List) { |
65 System.arraycopy(original, 0, combined, 0, original.length); | 46 List<Object> mintDirsAsList = (List<Object>) mintCurrentDirs; |
66 System.arraycopy(additional, 0, combined, original.length, additional.le ngth); | 47 concatAndRemoveEndDuplicates(mintDirsAsList, (List<Object>) host CurrentDirs); |
Yaron
2016/02/19 22:10:20
Are the duplicates a concern? Are they not just ig
Xi Han
2016/02/24 19:09:38
If simply inserting the Chrome's array before WebA
Yaron
2016/02/25 05:32:50
Perhaps you're reight and we shouldn't have the /v
| |
67 jlrField.set(instance, combined); | 48 List<Object> combined = (List<Object>) Reflect.getField(mintInst ance, fieldName); |
49 for (Object o: combined) { | |
Yaron
2016/02/19 22:10:20
nit: the previous line and this section are just f
Xi Han
2016/02/24 19:09:38
Done.
Yaron
2016/02/25 05:32:50
You can also get rid of Reflect.getField from both
Xi Han
2016/02/25 14:55:38
Good catch, removed.
| |
50 Log.w(TAG, "element in the path of " + fieldName + " : " + o .toString()); | |
51 } | |
52 } else { | |
53 Object[] mintDirsAsArray = (Object[]) mintCurrentDirs; | |
54 Object[] hostDirsAsArray = (Object[]) hostCurrentDirs; | |
55 Reflect.setField(mintInstance, fieldName, | |
56 concatAndRemoveEndDuplicates(mintDirsAsArray, hostDirsAs Array)); | |
57 Object[] combined = (Object[]) Reflect.getField(mintInstance, fi eldName); | |
58 for (Object o: combined) { | |
59 Log.w(TAG, "element in the path of " + fieldName + ": " + o. toString()); | |
60 } | |
61 } | |
62 } catch (ReflectiveOperationException e) { | |
63 e.printStackTrace(); | |
64 } | |
68 } | 65 } |
69 | 66 |
70 private void addExternalLoader() { | 67 /** |
68 * Combines two arrays into a new array. | |
69 * If the two arrays end with duplicated elements, keep one copy only. For e xample, | |
70 * the first array is [A, B, C, D], and the second array is [E, F, C, D], th e combined one is | |
71 * [A, B, E, F, C, D]. The unique elements are stored before the duplicates. | |
72 * The arrays must be of the same type. | |
73 * @param mintArrays: the array from a WebAPK | |
74 * @param hostArrays: the array from the host | |
75 * @return: a combined array consists of [WebAPK unique elements, host's uni que elements, | |
76 * duplicated one] | |
77 */ | |
78 private static Object[] concatAndRemoveEndDuplicates(Object[] mintArrays, Ob ject[] hostArrays) { | |
79 int duplicate1 = mintArrays.length - 1; | |
80 int duplicate2 = hostArrays.length - 1; | |
81 int count = 0; | |
82 while (duplicate1 >= 0 && duplicate2 >= 0 | |
83 && mintArrays[duplicate1].toString().equals(hostArrays[duplicate 2].toString())) { | |
84 --duplicate1; | |
85 --duplicate2; | |
86 ++count; | |
87 } | |
88 Object[] combined = (Object[]) Array.newInstance(mintArrays.getClass().g etComponentType(), | |
89 mintArrays.length + hostArrays.length - count); | |
90 if (mintArrays.length - count > 0) { | |
91 System.arraycopy(mintArrays, 0, combined, 0, mintArrays.length - cou nt); | |
92 } | |
93 System.arraycopy(hostArrays, 0, combined, mintArrays.length - count, hos tArrays.length); | |
94 return combined; | |
95 } | |
96 | |
97 /** | |
98 * Add the unique elements of the second list to the first one. | |
99 * If the two lists end with duplicated elements, keep one copy only. For ex ample, | |
100 * the first list is [A, B, C, D], and the second list is [E, F, C, D], the combined one is | |
101 * [A, B, E, F, C, D]. The unique elements are store before the duplicates. | |
102 * The lists must be of the same type. | |
103 * @param mintList: the list from a WebAPK | |
104 * @param hostList: the list from the host | |
105 * @return: a combined list consists of [WebAPK unique elements, host's uniq ue elements, | |
106 * duplicated one] | |
107 */ | |
108 private static void concatAndRemoveEndDuplicates(List<Object> mintList, List <Object> hostList) { | |
109 int duplicate1 = mintList.size() - 1; | |
110 int duplicate2 = hostList.size() - 1; | |
111 while (duplicate1 >= 0 && duplicate2 >= 0 | |
112 && mintList.get(duplicate1).toString().equals(hostList.get(dupli cate2).toString())) | |
113 { | |
114 --duplicate1; | |
115 --duplicate2; | |
116 } | |
117 for (int i = 0; i < duplicate2 + 1; i++) { | |
118 mintList.add(duplicate1 + i, hostList.get(i)); | |
119 } | |
120 } | |
121 | |
122 private void addExternalLoader() throws ReflectiveOperationException { | |
71 if (mRemoteContext == null) { | 123 if (mRemoteContext == null) { |
72 Log.w(TAG, "Failed to add external loader since the remote context i s null."); | 124 Log.w(TAG, "Failed to add external loader since the remote context i s null."); |
73 return; | 125 return; |
74 } | 126 } |
75 ClassLoader externalLoader = mRemoteContext.getClassLoader(); | 127 ClassLoader externalLoader = mRemoteContext.getClassLoader(); |
76 ClassLoader mintLoader = getClassLoader(); | 128 ClassLoader mintLoader = getClassLoader(); |
77 | 129 |
78 try { | 130 Object extDexPathList = Reflect.getField(externalLoader, "pathList"); |
79 Field field = findField(externalLoader, "pathList"); | 131 Object mintDexPathList = Reflect.getField(mintLoader, "pathList"); |
80 Object dexOriginal = field.get(mintLoader); | 132 expandField(mintDexPathList, "dexElements", extDexPathList); |
81 Object dexAdditional = field.get(externalLoader); | 133 } |
82 expandFieldArray(dexOriginal, "dexElements", dexAdditional); | 134 |
83 } catch (NoSuchFieldException | IllegalAccessException | IllegalArgument Exception e1) { | 135 private void addNativeLibrarySearchPath() throws ReflectiveOperationExceptio n { |
84 e1.printStackTrace(); | 136 if (mRemoteContext == null) { |
85 throw new RuntimeException(e1); | 137 Log.w(TAG, "Failed to add external loader since the remote context i s null."); |
138 return; | |
86 } | 139 } |
140 ClassLoader externalLoader = mRemoteContext.getClassLoader(); | |
141 ClassLoader mintLoader = getClassLoader(); | |
142 | |
143 // Since both WebAPK and its host have the "system/lib" and "vendor/lib" at the end of | |
144 // the native library directory path list, we want to add host's directo ries before the | |
145 // system directory, and only keep one copy of the system directories. | |
146 // This is because when System.loadLibrary() is called, we want it searc h the host's | |
147 // native library directories first. If a ".so" file doesn't exit, then search /system/lib. | |
148 Object extDexPathList = Reflect.getField(externalLoader, "pathList"); | |
149 Object mintDexPathList = Reflect.getField(mintLoader, "pathList"); | |
150 expandField(mintDexPathList, "nativeLibraryDirectories", extDexPathList) ; | |
151 expandField(mintDexPathList, "nativeLibraryPathElements", extDexPathList ); | |
87 } | 152 } |
88 | 153 |
89 @Override | 154 @Override |
90 public void onCreate() { | 155 public void onCreate() { |
91 super.onCreate(); | 156 super.onCreate(); |
92 try { | 157 try { |
93 String packageString = getSharedPreferences(MINT_PREFS, MODE_PRIVATE ) | 158 String packageString = getSharedPreferences(MINT_PREFS, MODE_PRIVATE ) |
94 .getString(CHROME_PACKAGE_PREF, DEFAULT_CHROME_PACKAGE_NAME) ; | 159 .getString(CHROME_PACKAGE_PREF, DEFAULT_CHROME_PACKAGE_NAME) ; |
95 Log.w(TAG, "Getting remote context for package " + packageString); | 160 Log.w(TAG, "Getting remote context for package " + packageString); |
96 mRemoteContext = getApplicationContext().createPackageContext( | 161 mRemoteContext = getApplicationContext().createPackageContext( |
97 packageString, | 162 packageString, |
98 Context.CONTEXT_IGNORE_SECURITY | Context.CONTEXT_INCLUDE_CO DE); | 163 Context.CONTEXT_IGNORE_SECURITY | Context.CONTEXT_INCLUDE_CO DE); |
99 addExternalLoader(); | 164 try { |
165 addExternalLoader(); | |
166 addNativeLibrarySearchPath(); | |
167 } catch (ReflectiveOperationException e) { | |
168 e.printStackTrace(); | |
169 } | |
100 Log.w(TAG, "Successfully add external loader."); | 170 Log.w(TAG, "Successfully add external loader."); |
101 } catch (NameNotFoundException e) { | 171 } catch (NameNotFoundException e) { |
102 e.printStackTrace(); | 172 e.printStackTrace(); |
103 } | 173 } |
104 } | 174 } |
105 } | 175 } |
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