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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_os_Parcel.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)();
// android_util_Binder.h
typedef sp<IBinder> (*ibinderForJavaObject_t)(JNIEnv* env, jobject obj);
typedef jobject (*javaObjectForIBinder_t)(JNIEnv* env, const sp<IBinder>& val);
// android_os_Parcel.h
typedef Parcel* (*parcelForJavaObject_t)(JNIEnv* env, jobject obj);
getJNIEnv_t _getJNIEnv;
ibinderForJavaObject_t _ibinderForJavaObject;
javaObjectForIBinder_t _javaObjectForIBinder;
parcelForJavaObject_t _parcelForJavaObject;
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
}
_parcelForJavaObject = reinterpret_cast<parcelForJavaObject_t>(
dlsym(handle, "_ZN7android19parcelForJavaObjectEP7_JNIEnvP8_jobject"));
if (_parcelForJavaObject == nullptr) {
ALOGW("Could not find parcelForJavaObject.");
// 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);
}
Parcel* parcelForJavaObject(JNIEnv* env, jobject obj) {
load();
if (_parcelForJavaObject == nullptr) {
return nullptr;
}
return _parcelForJavaObject(env, obj);
}
} // namespace android
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