Adjust dynamite loader to support chimera modules with merged class loaders

play-services-api/src/main/aidl/com/google/android/gms/dynamite/IDynamiteLoader.aidl

@@ -3,8 +3,12 @@ package com.google.android.gms.dynamite;
 import com.google.android.gms.dynamic.IObjectWrapper;
 
 interface IDynamiteLoader {
-    int getModuleVersion(IObjectWrapper context, String moduleId) = 0;
+    int getModuleVersion(IObjectWrapper wrappedContext, String moduleId) = 0;
-    int getModuleVersion2(IObjectWrapper context, String moduleId, boolean updateConfigIfRequired) = 2;
+    int getModuleVersion2(IObjectWrapper wrappedContext, String moduleId, boolean updateConfigIfRequired) = 2;
+    int getModuleVersion2NoCrashUtils(IObjectWrapper wrappedContext, String moduleId, boolean updateConfigIfRequired) = 4;
 
-    IObjectWrapper createModuleContext(IObjectWrapper context, String moduleId, int minVersion) = 1;
+    IObjectWrapper createModuleContext(IObjectWrapper wrappedContext, String moduleId, int minVersion) = 1;
-}
+    IObjectWrapper createModuleContextNoCrashUtils(IObjectWrapper wrappedContext, String moduleId, int minVersion) = 3;
+
+    int getIDynamiteLoaderVersion() = 5;
+}

play-services-core/src/main/java/com/google/android/gms/chimera/container/DynamiteContext.java

@@ -0,0 +1,95 @@
+/*
+ * SPDX-FileCopyrightText: 2021, microG Project Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.google.android.gms.chimera.container;
+
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.Process;
+import android.util.Log;
+
+import androidx.annotation.RequiresApi;
+
+import org.microg.gms.common.Constants;
+
+import java.io.File;
+
+import dalvik.system.PathClassLoader;
+
+public class DynamiteContext extends ContextWrapper {
+    private static final String TAG = "DynamiteContext";
+    private String moduleId;
+    private Context originalContext;
+    private Context gmsContext;
+    private DynamiteContext appContext;
+
+    public DynamiteContext(String moduleId, Context base, Context gmsContext, DynamiteContext appContext) {
+        super(base);
+        this.moduleId = moduleId;
+        this.originalContext = base;
+        this.gmsContext = gmsContext;
+        this.appContext = appContext;
+    }
+
+    @Override
+    public ClassLoader getClassLoader() {
+        if (new DynamiteModuleInfo(moduleId).isMergeClassLoader()) {
+            StringBuilder nativeLoaderDirs = new StringBuilder(gmsContext.getApplicationInfo().nativeLibraryDir);
+            if (Build.VERSION.SDK_INT >= 23 && Process.is64Bit()) {
+                for (String abi : Build.SUPPORTED_64_BIT_ABIS) {
+                    nativeLoaderDirs.append(File.pathSeparator).append(gmsContext.getApplicationInfo().sourceDir).append("!/lib/").append(abi);
+                }
+            } else if (Build.VERSION.SDK_INT >= 21) {
+                for (String abi : Build.SUPPORTED_32_BIT_ABIS) {
+                    nativeLoaderDirs.append(File.pathSeparator).append(gmsContext.getApplicationInfo().sourceDir).append("!/lib/").append(abi);
+                }
+            } else {
+                nativeLoaderDirs.append(File.pathSeparator).append(gmsContext.getApplicationInfo().sourceDir).append("!/lib/").append(Build.CPU_ABI);
+            }
+            return new PathClassLoader(gmsContext.getApplicationInfo().sourceDir, nativeLoaderDirs.toString(), originalContext.getClassLoader());
+        } else {
+            return gmsContext.getClassLoader();
+        }
+    }
+
+    @Override
+    public String getPackageName() {
+        return gmsContext.getPackageName();
+    }
+
+    @Override
+    public ApplicationInfo getApplicationInfo() {
+        return gmsContext.getApplicationInfo();
+    }
+
+    @Override
+    public Context getApplicationContext() {
+        return appContext;
+    }
+
+    @RequiresApi(24)
+    @Override
+    public Context createDeviceProtectedStorageContext() {
+        return new DynamiteContext(moduleId, originalContext.createDeviceProtectedStorageContext(), gmsContext.createDeviceProtectedStorageContext(), appContext);
+    }
+
+    public static DynamiteContext create(String moduleId, Context originalContext) {
+        try {
+            Context gmsContext = originalContext.createPackageContext(Constants.GMS_PACKAGE_NAME, new DynamiteModuleInfo(moduleId).getCreatePackageOptions());
+            Context originalAppContext = originalContext.getApplicationContext();
+            if (originalAppContext == null || originalAppContext == originalContext) {
+                return new DynamiteContext(moduleId, originalContext, gmsContext, null);
+            } else {
+                return new DynamiteContext(moduleId, originalContext, gmsContext, new DynamiteContext(moduleId, originalAppContext, gmsContext, null));
+            }
+        } catch (PackageManager.NameNotFoundException e) {
+            Log.w(TAG, e);
+            return null;
+        }
+    }
+}

play-services-core/src/main/java/com/google/android/gms/chimera/container/DynamiteLoaderImpl.java

@@ -35,28 +35,41 @@ public class DynamiteLoaderImpl extends IDynamiteLoader.Stub {
 
     @Override
     public IObjectWrapper createModuleContext(IObjectWrapper wrappedContext, String moduleId, int minVersion) throws RemoteException {
+        // We don't have crash utils, so just forward
+        return createModuleContextNoCrashUtils(wrappedContext, moduleId, minVersion);
+    }
+
+    @Override
+    public IObjectWrapper createModuleContextNoCrashUtils(IObjectWrapper wrappedContext, String moduleId, int minVersion) throws RemoteException {
         Log.d(TAG, "createModuleContext for " + moduleId + " at version " + minVersion);
+        final Context originalContext = (Context) ObjectWrapper.unwrap(wrappedContext);
+        return ObjectWrapper.wrap(DynamiteContext.create(moduleId, originalContext));
+    }
+
+    @Override
+    public int getIDynamiteLoaderVersion() throws RemoteException {
+        return 2;
+    }
+
+    @Override
+    public int getModuleVersion(IObjectWrapper wrappedContext, String moduleId) throws RemoteException {
+        return getModuleVersion2(wrappedContext, moduleId, true);
+    }
+
+    @Override
+    public int getModuleVersion2(IObjectWrapper wrappedContext, String moduleId, boolean updateConfigIfRequired) throws RemoteException {
+        // We don't have crash utils, so just forward
+        return getModuleVersion2NoCrashUtils(wrappedContext, moduleId, updateConfigIfRequired);
+    }
+
+    @Override
+    public int getModuleVersion2NoCrashUtils(IObjectWrapper wrappedContext, String moduleId, boolean updateConfigIfRequired) throws RemoteException {
         final Context context = (Context) ObjectWrapper.unwrap(wrappedContext);
-        try {
+        if (context == null) {
-            return ObjectWrapper.wrap(new ContextWrapper(context.createPackageContext(Constants.GMS_PACKAGE_NAME, Context.CONTEXT_INCLUDE_CODE | Context.CONTEXT_IGNORE_SECURITY)) {
+            Log.w(TAG, "Invalid client context");
-                @Override
+            return 0;
-                public Context getApplicationContext() {
-                    return context;
-                }
-            });
-        } catch (PackageManager.NameNotFoundException e) {
-            Log.w(TAG, "returning null instead", e);
-            return null;
         }
-    }
 
-    @Override
-    public int getModuleVersion(IObjectWrapper context, String moduleId) throws RemoteException {
-        return getModuleVersion2(context, moduleId, true);
-    }
-
-    @Override
-    public int getModuleVersion2(IObjectWrapper context, String moduleId, boolean updateConfigIfRequired) throws RemoteException {
         try {
             return Class.forName("com.google.android.gms.dynamite.descriptors." + moduleId + ".ModuleDescriptor").getDeclaredField("MODULE_VERSION").getInt(null);
         } catch (Exception e) {

play-services-core/src/main/java/com/google/android/gms/chimera/container/DynamiteModuleInfo.java

@@ -0,0 +1,51 @@
+/*
+ * SPDX-FileCopyrightText: 2021, microG Project Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package com.google.android.gms.chimera.container;
+
+import static android.content.Context.CONTEXT_IGNORE_SECURITY;
+import static android.content.Context.CONTEXT_INCLUDE_CODE;
+
+public class DynamiteModuleInfo {
+    private Class<?> descriptor;
+    private String moduleId;
+
+    public DynamiteModuleInfo(String moduleId) {
+        this.moduleId = moduleId;
+        try {
+            this.descriptor = Class.forName("com.google.android.gms.dynamite.descriptors." + moduleId + ".ModuleDescriptor");
+        } catch (Exception e) {
+            // Ignore
+        }
+    }
+
+    public String getModuleId() {
+        return moduleId;
+    }
+
+    public int getVersion() {
+        try {
+            return descriptor.getDeclaredField("MODULE_VERSION").getInt(null);
+        } catch (Exception e) {
+            return 0;
+        }
+    }
+
+    public int getCreatePackageOptions() {
+        try {
+            return descriptor.getDeclaredField("CREATE_PACKAGE_OPTIONS").getInt(null);
+        } catch (Exception e) {
+            return CONTEXT_INCLUDE_CODE | CONTEXT_IGNORE_SECURITY;
+        }
+    }
+
+    public boolean isMergeClassLoader() {
+        try {
+            return descriptor.getDeclaredField("MERGE_CLASS_LOADER").getBoolean(null);
+        } catch (Exception e) {
+            return false;
+        }
+    }
+}