libbinder_ndk: AParcel_fromJavaParcel

am: 7c615582a0

Change-Id: I10b3cc5940e1efb6dbf248023520a7a860e7db0e

6 files changed, 147 insertions, 0 deletions

diff --git a/libs/android_runtime_lazy/android_runtime_lazy.cpp b/libs/android_runtime_lazy/android_runtime_lazy.cpp
index 98d8e8a511..8062be676d 100644
--- a/libs/android_runtime_lazy/android_runtime_lazy.cpp
+++ b/libs/android_runtime_lazy/android_runtime_lazy.cpp
@@ -15,6 +15,7 @@
  */
 #define LOG_TAG "ANDROID_RUNTIME_LAZY"
 #include "android_runtime/AndroidRuntime.h"
+#include "android_os_Parcel.h"
 #include "android_util_Binder.h"
 
 #include <dlfcn.h>
@@ -28,12 +29,18 @@ 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, []() {
@@ -64,6 +71,13 @@ void load() {
             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
+        }
     });
 }
 
@@ -95,4 +109,12 @@ jobject javaObjectForIBinder(JNIEnv* env, const sp<IBinder>& val) {
     return _javaObjectForIBinder(env, val);
 }
 
+Parcel* parcelForJavaObject(JNIEnv* env, jobject obj) {
+    load();
+    if (_parcelForJavaObject == nullptr) {
+        return nullptr;
+    }
+    return _parcelForJavaObject(env, obj);
+}
+
 } // namespace android
diff --git a/libs/android_runtime_lazy/include/android_os_Parcel.h b/libs/android_runtime_lazy/include/android_os_Parcel.h
new file mode 100644
index 0000000000..19b094d02a
--- /dev/null
+++ b/libs/android_runtime_lazy/include/android_os_Parcel.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2020 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/Parcel.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.
+
+Parcel* parcelForJavaObject(JNIEnv* env, jobject obj);
+
+} // namespace android
diff --git a/libs/binder/ndk/Android.bp b/libs/binder/ndk/Android.bp
index c0ea6d7b1e..e66e425aee 100644
--- a/libs/binder/ndk/Android.bp
+++ b/libs/binder/ndk/Android.bp
@@ -50,6 +50,7 @@ cc_library_shared {
         "ibinder.cpp",
         "ibinder_jni.cpp",
         "parcel.cpp",
+        "parcel_jni.cpp",
         "process.cpp",
         "stability.cpp",
         "status.cpp",
diff --git a/libs/binder/ndk/include_ndk/android/binder_parcel_jni.h b/libs/binder/ndk/include_ndk/android/binder_parcel_jni.h
new file mode 100644
index 0000000000..65e1704439
--- /dev/null
+++ b/libs/binder/ndk/include_ndk/android/binder_parcel_jni.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+/**
+ * @addtogroup NdkBinder
+ * @{
+ */
+
+/**
+ * @file binder_parcel_jni.h
+ * @brief Conversions between AParcel and android.os.Parcel
+ */
+
+#pragma once
+
+#include <android/binder_parcel.h>
+
+#include <jni.h>
+
+__BEGIN_DECLS
+#if __ANDROID_API__ >= 30
+
+/**
+ * Converts an android.os.Parcel object into an AParcel* object.
+ *
+ * If the parcel is null, null is returned.
+ *
+ * Available since API level 30.
+ *
+ * \param env Java environment. Must not be null.
+ * \param parcel android.os.Parcel java object.
+ *
+ * \return an AParcel object representing the Java parcel object. If either parameter is null, this
+ * will return null. This must be deleted with AParcel_delete. This does not take ownership of the
+ * jobject and is only good for as long as the jobject is alive.
+ */
+__attribute__((warn_unused_result)) AParcel* AParcel_fromJavaParcel(JNIEnv* env, jobject parcel)
+        __INTRODUCED_IN(30);
+
+#endif  //__ANDROID_API__ >= 30
+__END_DECLS
+
+/** @} */
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index 71d8103161..f3158d7e18 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -105,6 +105,7 @@ LIBBINDER_NDK30 { # introduced=30
     AIBinder_setExtension;
     AStatus_getDescription;
     AStatus_deleteDescription;
+    AParcel_fromJavaParcel;
 
     AIBinder_markSystemStability; # apex
     AIBinder_markVendorStability; # llndk
diff --git a/libs/binder/ndk/parcel_jni.cpp b/libs/binder/ndk/parcel_jni.cpp
new file mode 100644
index 0000000000..53b2d7c4da
--- /dev/null
+++ b/libs/binder/ndk/parcel_jni.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#include <android/binder_parcel_jni.h>
+#include "parcel_internal.h"
+
+#include <android_os_Parcel.h>
+
+using ::android::Parcel;
+using ::android::parcelForJavaObject;
+
+AParcel* AParcel_fromJavaParcel(JNIEnv* env, jobject jbinder) {
+    if (jbinder == nullptr) {
+        return nullptr;
+    }
+
+    Parcel* parcel = parcelForJavaObject(env, jbinder);
+
+    if (parcel == nullptr) {
+        return nullptr;
+    }
+
+    return new AParcel(nullptr /*binder*/, parcel, false /*shouldOwn*/);
+}