| /* |
| * Copyright (C) 2017 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. |
| */ |
| |
| #define ATRACE_TAG ATRACE_TAG_RESOURCES |
| |
| #include "android-base/macros.h" |
| #include "android-base/stringprintf.h" |
| #include "android-base/unique_fd.h" |
| #include "androidfw/ApkAssets.h" |
| #include "utils/misc.h" |
| #include "utils/Trace.h" |
| |
| #include "core_jni_helpers.h" |
| #include "jni.h" |
| #include "nativehelper/ScopedUtfChars.h" |
| |
| using ::android::base::unique_fd; |
| |
| namespace android { |
| |
| static jlong NativeLoad(JNIEnv* env, jclass /*clazz*/, jstring java_path, jboolean system, |
| jboolean force_shared_lib, jboolean overlay) { |
| ScopedUtfChars path(env, java_path); |
| if (path.c_str() == nullptr) { |
| return 0; |
| } |
| |
| ATRACE_NAME(base::StringPrintf("LoadApkAssets(%s)", path.c_str()).c_str()); |
| |
| std::unique_ptr<const ApkAssets> apk_assets; |
| if (overlay) { |
| apk_assets = ApkAssets::LoadOverlay(path.c_str(), system); |
| } else if (force_shared_lib) { |
| apk_assets = ApkAssets::LoadAsSharedLibrary(path.c_str(), system); |
| } else { |
| apk_assets = ApkAssets::Load(path.c_str(), system); |
| } |
| |
| if (apk_assets == nullptr) { |
| std::string error_msg = base::StringPrintf("Failed to load asset path %s", path.c_str()); |
| jniThrowException(env, "java/io/IOException", error_msg.c_str()); |
| return 0; |
| } |
| return reinterpret_cast<jlong>(apk_assets.release()); |
| } |
| |
| static jlong NativeLoadFromFd(JNIEnv* env, jclass /*clazz*/, jobject file_descriptor, |
| jstring friendly_name, jboolean system, jboolean force_shared_lib) { |
| ScopedUtfChars friendly_name_utf8(env, friendly_name); |
| if (friendly_name_utf8.c_str() == nullptr) { |
| return 0; |
| } |
| |
| ATRACE_NAME(base::StringPrintf("LoadApkAssetsFd(%s)", friendly_name_utf8.c_str()).c_str()); |
| |
| int fd = jniGetFDFromFileDescriptor(env, file_descriptor); |
| if (fd < 0) { |
| jniThrowException(env, "java/lang/IllegalArgumentException", "Bad FileDescriptor"); |
| return 0; |
| } |
| |
| unique_fd dup_fd(::fcntl(fd, F_DUPFD_CLOEXEC, 0)); |
| if (dup_fd < 0) { |
| jniThrowIOException(env, errno); |
| return 0; |
| } |
| |
| std::unique_ptr<const ApkAssets> apk_assets = ApkAssets::LoadFromFd(std::move(dup_fd), |
| friendly_name_utf8.c_str(), |
| system, force_shared_lib); |
| if (apk_assets == nullptr) { |
| std::string error_msg = base::StringPrintf("Failed to load asset path %s from fd %d", |
| friendly_name_utf8.c_str(), dup_fd.get()); |
| jniThrowException(env, "java/io/IOException", error_msg.c_str()); |
| return 0; |
| } |
| return reinterpret_cast<jlong>(apk_assets.release()); |
| } |
| |
| static void NativeDestroy(JNIEnv* /*env*/, jclass /*clazz*/, jlong ptr) { |
| delete reinterpret_cast<ApkAssets*>(ptr); |
| } |
| |
| static jstring NativeGetAssetPath(JNIEnv* env, jclass /*clazz*/, jlong ptr) { |
| const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr); |
| return env->NewStringUTF(apk_assets->GetPath().c_str()); |
| } |
| |
| static jlong NativeGetStringBlock(JNIEnv* /*env*/, jclass /*clazz*/, jlong ptr) { |
| const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr); |
| return reinterpret_cast<jlong>(apk_assets->GetLoadedArsc()->GetStringPool()); |
| } |
| |
| static jboolean NativeIsUpToDate(JNIEnv* /*env*/, jclass /*clazz*/, jlong ptr) { |
| const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr); |
| (void)apk_assets; |
| return JNI_TRUE; |
| } |
| |
| static jlong NativeOpenXml(JNIEnv* env, jclass /*clazz*/, jlong ptr, jstring file_name) { |
| ScopedUtfChars path_utf8(env, file_name); |
| if (path_utf8.c_str() == nullptr) { |
| return 0; |
| } |
| |
| const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr); |
| std::unique_ptr<Asset> asset = apk_assets->Open(path_utf8.c_str(), |
| Asset::AccessMode::ACCESS_RANDOM); |
| if (asset == nullptr) { |
| jniThrowException(env, "java/io/FileNotFoundException", path_utf8.c_str()); |
| return 0; |
| } |
| |
| // DynamicRefTable is only needed when looking up resource references. Opening an XML file |
| // directly from an ApkAssets has no notion of proper resource references. |
| std::unique_ptr<ResXMLTree> xml_tree = util::make_unique<ResXMLTree>(nullptr /*dynamicRefTable*/); |
| status_t err = xml_tree->setTo(asset->getBuffer(true), asset->getLength(), true); |
| asset.reset(); |
| |
| if (err != NO_ERROR) { |
| jniThrowException(env, "java/io/FileNotFoundException", "Corrupt XML binary file"); |
| return 0; |
| } |
| return reinterpret_cast<jlong>(xml_tree.release()); |
| } |
| |
| // JNI registration. |
| static const JNINativeMethod gApkAssetsMethods[] = { |
| {"nativeLoad", "(Ljava/lang/String;ZZZ)J", (void*)NativeLoad}, |
| {"nativeLoadFromFd", "(Ljava/io/FileDescriptor;Ljava/lang/String;ZZ)J", |
| (void*)NativeLoadFromFd}, |
| {"nativeDestroy", "(J)V", (void*)NativeDestroy}, |
| {"nativeGetAssetPath", "(J)Ljava/lang/String;", (void*)NativeGetAssetPath}, |
| {"nativeGetStringBlock", "(J)J", (void*)NativeGetStringBlock}, |
| {"nativeIsUpToDate", "(J)Z", (void*)NativeIsUpToDate}, |
| {"nativeOpenXml", "(JLjava/lang/String;)J", (void*)NativeOpenXml}, |
| }; |
| |
| int register_android_content_res_ApkAssets(JNIEnv* env) { |
| return RegisterMethodsOrDie(env, "android/content/res/ApkAssets", gApkAssetsMethods, |
| arraysize(gApkAssetsMethods)); |
| } |
| |
| } // namespace android |