Merge "Add libandroid_runtime_lazy" (89dd7fe2) · Commits · e / os / android_frameworks_native-old

libs/android_runtime_lazy/Android.bp

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			/*
			* Copyright (C) 2019 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.
			*/

			// libandroid_runtime_lazy is a shim library.
			// This provides very limited small set of APIs from libandroid_runtime.
			//
			// By depending on this instead of libandroid_runtime,
			// a library can be loaded without paying the cost of libandroid_runtime
			// which is quite huge. The cost will be paid when libandroid_runtime is actually used.
			//
			// For Partial-source PDK build, there is a constraint that
			// frameworks/native modules should not depend on frameworks/base.
			// This library can be used to cut down the dependency between them.
			// (e.g. libbinder_ndk)
			//
			// Some libraries which serve as LL-NDK and NDK as well may depend on this
			// instead of libandroid_runtime. When they are used by a vendor process,
			// depending on libandroid_runtime is meaningless. In this case,
			// they can depend on libandroid_runtime_lazy.
			cc_library {
			name: "libandroid_runtime_lazy",
			vendor_available: true,

			cflags: [
			"-Wall",
			"-Werror",
			"-Wunused",
			"-Wunreachable-code",
			],

			srcs: [
			"android_runtime_lazy.cpp",
			],

			shared_libs: [
			"liblog",
			"libutils",
			],

			required: [
			"libandroid_runtime",
			],

			export_include_dirs: [
			"include",
			],

			header_libs: [
			"jni_headers",
			"libbinder_headers",
			],
			}

libs/android_runtime_lazy/android_runtime_lazy.cpp

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			/*
			* Copyright (C) 2019 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 LOG_TAG "ANDROID_RUNTIME_LAZY"
			#include "android_runtime/AndroidRuntime.h"
			#include "android_util_Binder.h"

			#include <dlfcn.h>
			#include <mutex>

			#include <log/log.h>

			namespace android {
			namespace {

			std::once_flag loadFlag;

			typedef JNIEnv* (*getJNIEnv_t)();
			typedef sp<IBinder> (ibinderForJavaObject_t)(JNIEnv env, jobject obj);
			typedef jobject (javaObjectForIBinder_t)(JNIEnv env, const sp<IBinder>& val);

			getJNIEnv_t _getJNIEnv;
			ibinderForJavaObject_t _ibinderForJavaObject;
			javaObjectForIBinder_t _javaObjectForIBinder;

			void load() {
			std::call_once(loadFlag, []() {
			void* handle = dlopen("libandroid_runtime.so", RTLD_LAZY);
			if (handle == nullptr) {
			ALOGE("Could not open libandroid_runtime.");
			return;
			}

			_getJNIEnv = reinterpret_cast<getJNIEnv_t>(
			dlsym(handle, "_ZN7android14AndroidRuntime9getJNIEnvEv"));
			if (_getJNIEnv == nullptr) {
			ALOGW("Could not find getJNIEnv.");
			// no return
			}

			_ibinderForJavaObject = reinterpret_cast<ibinderForJavaObject_t>(
			dlsym(handle, "_ZN7android20ibinderForJavaObjectEP7_JNIEnvP8_jobject"));
			if (_ibinderForJavaObject == nullptr) {
			ALOGW("Could not find ibinderForJavaObject.");
			// no return
			}

			_javaObjectForIBinder = reinterpret_cast<javaObjectForIBinder_t>(
			dlsym(handle,
			"_ZN7android20javaObjectForIBinderEP7_JNIEnvRKNS_2spINS_7IBinderEEE"));
			if (_javaObjectForIBinder == nullptr) {
			ALOGW("Could not find javaObjectForIBinder.");
			// no return
			}
			});
			}

			} // namespace

			// exports delegate functions

			JNIEnv* AndroidRuntime::getJNIEnv() {
			load();
			if (_getJNIEnv == nullptr) {
			return nullptr;
			}
			return _getJNIEnv();
			}

			sp<IBinder> ibinderForJavaObject(JNIEnv* env, jobject obj) {
			load();
			if (_ibinderForJavaObject == nullptr) {
			return nullptr;
			}
			return _ibinderForJavaObject(env, obj);
			}

			jobject javaObjectForIBinder(JNIEnv* env, const sp<IBinder>& val) {
			load();
			if (_javaObjectForIBinder == nullptr) {
			return nullptr;
			}
			return _javaObjectForIBinder(env, val);
			}

			} // namespace android

libs/android_runtime_lazy/include/android_runtime/AndroidRuntime.h

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			/*
			* Copyright (C) 2019 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.
			*/

			#pragma once

			#include "jni.h"

			namespace android {

			// Intentionally use the same name with AndroidRuntime in frameworks/base/core/jni/
			// to make the client use this in the same way with the original class.
			class AndroidRuntime {
			public:
			static JNIEnv* getJNIEnv();
			};

			} // namespace android

libs/android_runtime_lazy/include/android_util_Binder.h

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			/*
			* Copyright (C) 2019 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.
			*/

			#pragma once

			#include <binder/IBinder.h>
			#include "jni.h"

			namespace android {

			// The name of this file is same with the file in frameworks/base/core/jni/
			// This is intentional to make the client use these exported functions
			// in the same way with the original.

			jobject javaObjectForIBinder(JNIEnv* env, const sp<IBinder>& val);
			sp<IBinder> ibinderForJavaObject(JNIEnv* env, jobject obj);

			} // namespace android

libs/binder/ndk/Android.bp

+1 −6

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	@@ -39,17 +39,12 @@ cc_library {
	],		],

	shared_libs: [		shared_libs: [
			"libandroid_runtime_lazy",
	"libbase",		"libbase",
	"libbinder",		"libbinder",
	"libutils",		"libutils",
	],		],

	required: [
	// libbinder_ndk may be used by Java and non-Java things. When lower-level things use it,
	// they shouldn't have to take on the cost of loading libandroid_runtime.
	"libandroid_runtime",
	],

	header_libs: [		header_libs: [
	"jni_headers",		"jni_headers",
	],		],