From 8febd8cc7a151aa2e41b997c8fe909e014ea4fe1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=97=E5=AE=AB=E9=9B=AA=E7=8F=8A?= <vvb2060@gmail.com>
Date: Thu, 19 May 2022 04:57:35 +0800
Subject: [PATCH] Fix resource hook on MediaTek (#1951)

---
 .../de/robv/android/xposed/XposedBridge.java  | 29 +++++++++++++++----
 .../lspd/service/ConfigFileManager.java       | 24 +++++++++++++--
 2 files changed, 46 insertions(+), 7 deletions(-)

diff --git a/core/src/main/java/de/robv/android/xposed/XposedBridge.java b/core/src/main/java/de/robv/android/xposed/XposedBridge.java
index 176d8239..16e9ecf2 100644
--- a/core/src/main/java/de/robv/android/xposed/XposedBridge.java
+++ b/core/src/main/java/de/robv/android/xposed/XposedBridge.java
@@ -20,10 +20,11 @@
 
 package de.robv.android.xposed;
 
-import static de.robv.android.xposed.XposedHelpers.setObjectField;
-
 import android.app.ActivityThread;
+import android.content.ContextWrapper;
+import android.content.pm.ApplicationInfo;
 import android.content.res.Resources;
+import android.content.res.ResourcesImpl;
 import android.content.res.TypedArray;
 import android.util.Log;
 
@@ -50,7 +51,6 @@ import de.robv.android.xposed.callbacks.XC_LoadPackage;
  * This class contains most of Xposed's central logic, such as initialization and callbacks used by
  * the native side. It also includes methods to add new hooks.
  */
-@SuppressWarnings("JniMissingFunction")
 public final class XposedBridge {
     /**
      * The system class loader which can be used to locate Android framework classes.
@@ -133,10 +133,29 @@ public final class XposedBridge {
             ResourcesHook.makeInheritable(resClass);
             ResourcesHook.makeInheritable(taClass);
             ClassLoader myCL = XposedBridge.class.getClassLoader();
+            assert myCL != null;
             dummyClassLoader = ResourcesHook.buildDummyClassLoader(myCL.getParent(), resClass.getName(), taClass.getName());
             dummyClassLoader.loadClass("xposed.dummy.XResourcesSuperClass");
             dummyClassLoader.loadClass("xposed.dummy.XTypedArraySuperClass");
-            setObjectField(myCL, "parent", dummyClassLoader);
+            XposedHelpers.setObjectField(myCL, "parent", dummyClassLoader);
+
+            var contextField = XposedHelpers.findFieldIfExists(ResourcesImpl.class, "mAppContext");
+            // Used by com.mediatek.res.AsyncDrawableCache.putCacheList
+            if (contextField != null) {
+                var mediatekCompat = new ContextWrapper(null) {
+                    private final ApplicationInfo info = new ApplicationInfo();
+
+                    @Override
+                    public ApplicationInfo getApplicationInfo() {
+                        info.processName = "system";
+                        return info;
+                    }
+                };
+
+                // This field will be updated to correct value
+                // after ContextImpl.createAppContext
+                contextField.set(null, mediatekCompat);
+            }
         } catch (Throwable throwable) {
             XposedBridge.log(throwable);
             XposedInit.disableResources = true;
@@ -405,7 +424,7 @@ public final class XposedBridge {
             } else {
                 returnType = null;
             }
-            params = new Object[] {
+            params = new Object[]{
                     method,
                     returnType,
                     isStatic,
diff --git a/daemon/src/main/java/org/lsposed/lspd/service/ConfigFileManager.java b/daemon/src/main/java/org/lsposed/lspd/service/ConfigFileManager.java
index cb22b8a4..986d8131 100644
--- a/daemon/src/main/java/org/lsposed/lspd/service/ConfigFileManager.java
+++ b/daemon/src/main/java/org/lsposed/lspd/service/ConfigFileManager.java
@@ -22,11 +22,13 @@ package org.lsposed.lspd.service;
 import static org.lsposed.lspd.service.ServiceManager.TAG;
 import static org.lsposed.lspd.service.ServiceManager.toGlobalNamespace;
 
+import android.content.ContextWrapper;
+import android.content.pm.ApplicationInfo;
 import android.content.res.AssetManager;
 import android.content.res.Resources;
+import android.content.res.ResourcesImpl;
 import android.os.ParcelFileDescriptor;
 import android.os.Process;
-import android.os.RemoteException;
 import android.os.SELinux;
 import android.os.SharedMemory;
 import android.system.ErrnoException;
@@ -134,12 +136,30 @@ public class ConfigFileManager {
             Method addAssetPath = AssetManager.class.getDeclaredMethod("addAssetPath", String.class);
             addAssetPath.setAccessible(true);
             //noinspection ConstantConditions
-            if ((int) addAssetPath.invoke(am, daemonApkPath.toString()) > 0)
+            if ((int) addAssetPath.invoke(am, daemonApkPath.toString()) > 0) {
                 //noinspection deprecation
                 res = new Resources(am, null, null);
+            }
         } catch (Throwable e) {
             Log.e(TAG, Log.getStackTraceString(e));
         }
+        try {
+            @SuppressWarnings("JavaReflectionMemberAccess")
+            var contextField = ResourcesImpl.class.getDeclaredField("mAppContext");
+            contextField.setAccessible(true);
+            var mediatekCompat = new ContextWrapper(null) {
+                private final ApplicationInfo info = new ApplicationInfo();
+
+                @Override
+                public ApplicationInfo getApplicationInfo() {
+                    info.processName = "system";
+                    return info;
+                }
+            };
+            contextField.set(null, mediatekCompat);
+        } catch (Exception ignored) {
+            // Not a MediaTek device
+        }
     }
 
     static void reloadConfiguration() {