Jooyung Han | 1f65e77 | 2019-03-07 16:55:04 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | #define LOG_TAG "ANDROID_RUNTIME_LAZY" |
| 17 | #include "android_runtime/AndroidRuntime.h" |
Steven Moreland | 7c61558 | 2020-01-06 16:34:39 -0800 | [diff] [blame] | 18 | #include "android_os_Parcel.h" |
Jooyung Han | 1f65e77 | 2019-03-07 16:55:04 +0900 | [diff] [blame] | 19 | #include "android_util_Binder.h" |
| 20 | |
| 21 | #include <dlfcn.h> |
| 22 | #include <mutex> |
| 23 | |
| 24 | #include <log/log.h> |
| 25 | |
| 26 | namespace android { |
| 27 | namespace { |
| 28 | |
| 29 | std::once_flag loadFlag; |
| 30 | |
| 31 | typedef JNIEnv* (*getJNIEnv_t)(); |
Steven Moreland | 7c61558 | 2020-01-06 16:34:39 -0800 | [diff] [blame] | 32 | |
| 33 | // android_util_Binder.h |
Jooyung Han | 1f65e77 | 2019-03-07 16:55:04 +0900 | [diff] [blame] | 34 | typedef sp<IBinder> (*ibinderForJavaObject_t)(JNIEnv* env, jobject obj); |
| 35 | typedef jobject (*javaObjectForIBinder_t)(JNIEnv* env, const sp<IBinder>& val); |
| 36 | |
Steven Moreland | 7c61558 | 2020-01-06 16:34:39 -0800 | [diff] [blame] | 37 | // android_os_Parcel.h |
| 38 | typedef Parcel* (*parcelForJavaObject_t)(JNIEnv* env, jobject obj); |
| 39 | |
Jooyung Han | 1f65e77 | 2019-03-07 16:55:04 +0900 | [diff] [blame] | 40 | getJNIEnv_t _getJNIEnv; |
| 41 | ibinderForJavaObject_t _ibinderForJavaObject; |
| 42 | javaObjectForIBinder_t _javaObjectForIBinder; |
Steven Moreland | 7c61558 | 2020-01-06 16:34:39 -0800 | [diff] [blame] | 43 | parcelForJavaObject_t _parcelForJavaObject; |
Jooyung Han | 1f65e77 | 2019-03-07 16:55:04 +0900 | [diff] [blame] | 44 | |
| 45 | void load() { |
| 46 | std::call_once(loadFlag, []() { |
| 47 | void* handle = dlopen("libandroid_runtime.so", RTLD_LAZY); |
| 48 | if (handle == nullptr) { |
| 49 | ALOGE("Could not open libandroid_runtime."); |
| 50 | return; |
| 51 | } |
| 52 | |
| 53 | _getJNIEnv = reinterpret_cast<getJNIEnv_t>( |
| 54 | dlsym(handle, "_ZN7android14AndroidRuntime9getJNIEnvEv")); |
| 55 | if (_getJNIEnv == nullptr) { |
| 56 | ALOGW("Could not find getJNIEnv."); |
| 57 | // no return |
| 58 | } |
| 59 | |
| 60 | _ibinderForJavaObject = reinterpret_cast<ibinderForJavaObject_t>( |
| 61 | dlsym(handle, "_ZN7android20ibinderForJavaObjectEP7_JNIEnvP8_jobject")); |
| 62 | if (_ibinderForJavaObject == nullptr) { |
| 63 | ALOGW("Could not find ibinderForJavaObject."); |
| 64 | // no return |
| 65 | } |
| 66 | |
| 67 | _javaObjectForIBinder = reinterpret_cast<javaObjectForIBinder_t>( |
| 68 | dlsym(handle, |
| 69 | "_ZN7android20javaObjectForIBinderEP7_JNIEnvRKNS_2spINS_7IBinderEEE")); |
| 70 | if (_javaObjectForIBinder == nullptr) { |
| 71 | ALOGW("Could not find javaObjectForIBinder."); |
| 72 | // no return |
| 73 | } |
Steven Moreland | 7c61558 | 2020-01-06 16:34:39 -0800 | [diff] [blame] | 74 | |
| 75 | _parcelForJavaObject = reinterpret_cast<parcelForJavaObject_t>( |
| 76 | dlsym(handle, "_ZN7android19parcelForJavaObjectEP7_JNIEnvP8_jobject")); |
| 77 | if (_parcelForJavaObject == nullptr) { |
| 78 | ALOGW("Could not find parcelForJavaObject."); |
| 79 | // no return |
| 80 | } |
Jooyung Han | 1f65e77 | 2019-03-07 16:55:04 +0900 | [diff] [blame] | 81 | }); |
| 82 | } |
| 83 | |
| 84 | } // namespace |
| 85 | |
| 86 | // exports delegate functions |
| 87 | |
| 88 | JNIEnv* AndroidRuntime::getJNIEnv() { |
| 89 | load(); |
| 90 | if (_getJNIEnv == nullptr) { |
| 91 | return nullptr; |
| 92 | } |
| 93 | return _getJNIEnv(); |
| 94 | } |
| 95 | |
| 96 | sp<IBinder> ibinderForJavaObject(JNIEnv* env, jobject obj) { |
| 97 | load(); |
| 98 | if (_ibinderForJavaObject == nullptr) { |
| 99 | return nullptr; |
| 100 | } |
| 101 | return _ibinderForJavaObject(env, obj); |
| 102 | } |
| 103 | |
| 104 | jobject javaObjectForIBinder(JNIEnv* env, const sp<IBinder>& val) { |
| 105 | load(); |
| 106 | if (_javaObjectForIBinder == nullptr) { |
| 107 | return nullptr; |
| 108 | } |
| 109 | return _javaObjectForIBinder(env, val); |
| 110 | } |
| 111 | |
Steven Moreland | 7c61558 | 2020-01-06 16:34:39 -0800 | [diff] [blame] | 112 | Parcel* parcelForJavaObject(JNIEnv* env, jobject obj) { |
| 113 | load(); |
| 114 | if (_parcelForJavaObject == nullptr) { |
| 115 | return nullptr; |
| 116 | } |
| 117 | return _parcelForJavaObject(env, obj); |
| 118 | } |
| 119 | |
Jooyung Han | 1f65e77 | 2019-03-07 16:55:04 +0900 | [diff] [blame] | 120 | } // namespace android |