diff --git a/libs/binder/include/binder/Parcel.h b/libs/binder/include/binder/Parcel.h
index 4b2d50d..cfe1f3a 100644
--- a/libs/binder/include/binder/Parcel.h
+++ b/libs/binder/include/binder/Parcel.h
@@ -131,7 +131,7 @@
     status_t            writeString8(const char* str, size_t len);
     status_t            writeString16(const String16& str);
     status_t            writeString16(const std::optional<String16>& str);
-    status_t            writeString16(const std::unique_ptr<String16>& str);
+    status_t            writeString16(const std::unique_ptr<String16>& str) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeString16(const char16_t* str, size_t len);
     status_t            writeStrongBinder(const sp<IBinder>& val);
     status_t            writeInt32Array(size_t len, const int32_t *val);
@@ -143,48 +143,48 @@
     // Take a UTF8 encoded string, convert to UTF16, write it to the parcel.
     status_t            writeUtf8AsUtf16(const std::string& str);
     status_t            writeUtf8AsUtf16(const std::optional<std::string>& str);
-    status_t            writeUtf8AsUtf16(const std::unique_ptr<std::string>& str);
+    status_t            writeUtf8AsUtf16(const std::unique_ptr<std::string>& str) __attribute__((deprecated("use std::optional version instead")));
 
     status_t            writeByteVector(const std::optional<std::vector<int8_t>>& val);
-    status_t            writeByteVector(const std::unique_ptr<std::vector<int8_t>>& val);
+    status_t            writeByteVector(const std::unique_ptr<std::vector<int8_t>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeByteVector(const std::vector<int8_t>& val);
     status_t            writeByteVector(const std::optional<std::vector<uint8_t>>& val);
-    status_t            writeByteVector(const std::unique_ptr<std::vector<uint8_t>>& val);
+    status_t            writeByteVector(const std::unique_ptr<std::vector<uint8_t>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeByteVector(const std::vector<uint8_t>& val);
     status_t            writeInt32Vector(const std::optional<std::vector<int32_t>>& val);
-    status_t            writeInt32Vector(const std::unique_ptr<std::vector<int32_t>>& val);
+    status_t            writeInt32Vector(const std::unique_ptr<std::vector<int32_t>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeInt32Vector(const std::vector<int32_t>& val);
     status_t            writeInt64Vector(const std::optional<std::vector<int64_t>>& val);
-    status_t            writeInt64Vector(const std::unique_ptr<std::vector<int64_t>>& val);
+    status_t            writeInt64Vector(const std::unique_ptr<std::vector<int64_t>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeInt64Vector(const std::vector<int64_t>& val);
     status_t            writeUint64Vector(const std::optional<std::vector<uint64_t>>& val);
-    status_t            writeUint64Vector(const std::unique_ptr<std::vector<uint64_t>>& val);
+    status_t            writeUint64Vector(const std::unique_ptr<std::vector<uint64_t>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeUint64Vector(const std::vector<uint64_t>& val);
     status_t            writeFloatVector(const std::optional<std::vector<float>>& val);
-    status_t            writeFloatVector(const std::unique_ptr<std::vector<float>>& val);
+    status_t            writeFloatVector(const std::unique_ptr<std::vector<float>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeFloatVector(const std::vector<float>& val);
     status_t            writeDoubleVector(const std::optional<std::vector<double>>& val);
-    status_t            writeDoubleVector(const std::unique_ptr<std::vector<double>>& val);
+    status_t            writeDoubleVector(const std::unique_ptr<std::vector<double>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeDoubleVector(const std::vector<double>& val);
     status_t            writeBoolVector(const std::optional<std::vector<bool>>& val);
-    status_t            writeBoolVector(const std::unique_ptr<std::vector<bool>>& val);
+    status_t            writeBoolVector(const std::unique_ptr<std::vector<bool>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeBoolVector(const std::vector<bool>& val);
     status_t            writeCharVector(const std::optional<std::vector<char16_t>>& val);
-    status_t            writeCharVector(const std::unique_ptr<std::vector<char16_t>>& val);
+    status_t            writeCharVector(const std::unique_ptr<std::vector<char16_t>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeCharVector(const std::vector<char16_t>& val);
     status_t            writeString16Vector(
                             const std::optional<std::vector<std::optional<String16>>>& val);
     status_t            writeString16Vector(
-                            const std::unique_ptr<std::vector<std::unique_ptr<String16>>>& val);
+                            const std::unique_ptr<std::vector<std::unique_ptr<String16>>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeString16Vector(const std::vector<String16>& val);
     status_t            writeUtf8VectorAsUtf16Vector(
                             const std::optional<std::vector<std::optional<std::string>>>& val);
     status_t            writeUtf8VectorAsUtf16Vector(
-                            const std::unique_ptr<std::vector<std::unique_ptr<std::string>>>& val);
+                            const std::unique_ptr<std::vector<std::unique_ptr<std::string>>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeUtf8VectorAsUtf16Vector(const std::vector<std::string>& val);
 
     status_t            writeStrongBinderVector(const std::optional<std::vector<sp<IBinder>>>& val);
-    status_t            writeStrongBinderVector(const std::unique_ptr<std::vector<sp<IBinder>>>& val);
+    status_t            writeStrongBinderVector(const std::unique_ptr<std::vector<sp<IBinder>>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeStrongBinderVector(const std::vector<sp<IBinder>>& val);
 
     // Write an Enum vector with underlying type int8_t.
@@ -194,21 +194,21 @@
     template<typename T, std::enable_if_t<std::is_enum_v<T> && std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
     status_t            writeEnumVector(const std::optional<std::vector<T>>& val);
     template<typename T, std::enable_if_t<std::is_enum_v<T> && std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
-    status_t            writeEnumVector(const std::unique_ptr<std::vector<T>>& val);
+    status_t            writeEnumVector(const std::unique_ptr<std::vector<T>>& val) __attribute__((deprecated("use std::optional version instead")));
     // Write an Enum vector with underlying type != int8_t.
     template<typename T, std::enable_if_t<std::is_enum_v<T> && !std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
     status_t            writeEnumVector(const std::vector<T>& val);
     template<typename T, std::enable_if_t<std::is_enum_v<T> && !std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
     status_t            writeEnumVector(const std::optional<std::vector<T>>& val);
     template<typename T, std::enable_if_t<std::is_enum_v<T> && !std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
-    status_t            writeEnumVector(const std::unique_ptr<std::vector<T>>& val);
+    status_t            writeEnumVector(const std::unique_ptr<std::vector<T>>& val) __attribute__((deprecated("use std::optional version instead")));
 
     template<typename T>
     status_t            writeParcelableVector(const std::optional<std::vector<std::optional<T>>>& val);
     template<typename T>
-    status_t            writeParcelableVector(const std::unique_ptr<std::vector<std::unique_ptr<T>>>& val);
+    status_t            writeParcelableVector(const std::unique_ptr<std::vector<std::unique_ptr<T>>>& val) __attribute__((deprecated("use std::optional version instead")));
     template<typename T>
-    status_t            writeParcelableVector(const std::shared_ptr<std::vector<std::unique_ptr<T>>>& val);
+    status_t            writeParcelableVector(const std::shared_ptr<std::vector<std::unique_ptr<T>>>& val) __attribute__((deprecated("use std::optional version instead")));
     template<typename T>
     status_t            writeParcelableVector(const std::shared_ptr<std::vector<std::optional<T>>>& val);
     template<typename T>
@@ -217,7 +217,7 @@
     template<typename T>
     status_t            writeNullableParcelable(const std::optional<T>& parcelable);
     template<typename T>
-    status_t            writeNullableParcelable(const std::unique_ptr<T>& parcelable);
+    status_t            writeNullableParcelable(const std::unique_ptr<T>& parcelable) __attribute__((deprecated("use std::optional version instead")));
 
     status_t            writeParcelable(const Parcelable& parcelable);
 
@@ -232,7 +232,7 @@
     template<typename T>
     status_t            writeVectorSize(const std::optional<std::vector<T>>& val);
     template<typename T>
-    status_t            writeVectorSize(const std::unique_ptr<std::vector<T>>& val);
+    status_t            writeVectorSize(const std::unique_ptr<std::vector<T>>& val) __attribute__((deprecated("use std::optional version instead")));
 
     // Place a native_handle into the parcel (the native_handle's file-
     // descriptors are dup'ed, so it is safe to delete the native_handle
@@ -269,7 +269,7 @@
     status_t            writeUniqueFileDescriptorVector(
                             const std::optional<std::vector<base::unique_fd>>& val);
     status_t            writeUniqueFileDescriptorVector(
-                            const std::unique_ptr<std::vector<base::unique_fd>>& val);
+                            const std::unique_ptr<std::vector<base::unique_fd>>& val) __attribute__((deprecated("use std::optional version instead")));
     status_t            writeUniqueFileDescriptorVector(
                             const std::vector<base::unique_fd>& val);
 
@@ -317,7 +317,7 @@
     // Read a UTF16 encoded string, convert to UTF8
     status_t            readUtf8FromUtf16(std::string* str) const;
     status_t            readUtf8FromUtf16(std::optional<std::string>* str) const;
-    status_t            readUtf8FromUtf16(std::unique_ptr<std::string>* str) const;
+    status_t            readUtf8FromUtf16(std::unique_ptr<std::string>* str) const __attribute__((deprecated("use std::optional version instead")));
 
     const char*         readCString() const;
     String8             readString8() const;
@@ -326,7 +326,7 @@
     String16            readString16() const;
     status_t            readString16(String16* pArg) const;
     status_t            readString16(std::optional<String16>* pArg) const;
-    status_t            readString16(std::unique_ptr<String16>* pArg) const;
+    status_t            readString16(std::unique_ptr<String16>* pArg) const __attribute__((deprecated("use std::optional version instead")));
     const char16_t*     readString16Inplace(size_t* outLen) const;
     sp<IBinder>         readStrongBinder() const;
     status_t            readStrongBinder(sp<IBinder>* val) const;
@@ -337,14 +337,14 @@
     template<typename T, std::enable_if_t<std::is_enum_v<T> && std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
     status_t            readEnumVector(std::vector<T>* val) const;
     template<typename T, std::enable_if_t<std::is_enum_v<T> && std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
-    status_t            readEnumVector(std::unique_ptr<std::vector<T>>* val) const;
+    status_t            readEnumVector(std::unique_ptr<std::vector<T>>* val) const __attribute__((deprecated("use std::optional version instead")));
     template<typename T, std::enable_if_t<std::is_enum_v<T> && std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
     status_t            readEnumVector(std::optional<std::vector<T>>* val) const;
     // Read an Enum vector with underlying type != int8_t.
     template<typename T, std::enable_if_t<std::is_enum_v<T> && !std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
     status_t            readEnumVector(std::vector<T>* val) const;
     template<typename T, std::enable_if_t<std::is_enum_v<T> && !std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
-    status_t            readEnumVector(std::unique_ptr<std::vector<T>>* val) const;
+    status_t            readEnumVector(std::unique_ptr<std::vector<T>>* val) const __attribute__((deprecated("use std::optional version instead")));
     template<typename T, std::enable_if_t<std::is_enum_v<T> && !std::is_same_v<typename std::underlying_type_t<T>,int8_t>, bool> = 0>
     status_t            readEnumVector(std::optional<std::vector<T>>* val) const;
 
@@ -353,7 +353,7 @@
                             std::optional<std::vector<std::optional<T>>>* val) const;
     template<typename T>
     status_t            readParcelableVector(
-                            std::unique_ptr<std::vector<std::unique_ptr<T>>>* val) const;
+                            std::unique_ptr<std::vector<std::unique_ptr<T>>>* val) const __attribute__((deprecated("use std::optional version instead")));
     template<typename T>
     status_t            readParcelableVector(std::vector<T>* val) const;
 
@@ -362,7 +362,7 @@
     template<typename T>
     status_t            readParcelable(std::optional<T>* parcelable) const;
     template<typename T>
-    status_t            readParcelable(std::unique_ptr<T>* parcelable) const;
+    status_t            readParcelable(std::unique_ptr<T>* parcelable) const __attribute__((deprecated("use std::optional version instead")));
 
     template<typename T>
     status_t            readStrongBinder(sp<T>* val) const;
@@ -371,45 +371,45 @@
     status_t            readNullableStrongBinder(sp<T>* val) const;
 
     status_t            readStrongBinderVector(std::optional<std::vector<sp<IBinder>>>* val) const;
-    status_t            readStrongBinderVector(std::unique_ptr<std::vector<sp<IBinder>>>* val) const;
+    status_t            readStrongBinderVector(std::unique_ptr<std::vector<sp<IBinder>>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readStrongBinderVector(std::vector<sp<IBinder>>* val) const;
 
     status_t            readByteVector(std::optional<std::vector<int8_t>>* val) const;
-    status_t            readByteVector(std::unique_ptr<std::vector<int8_t>>* val) const;
+    status_t            readByteVector(std::unique_ptr<std::vector<int8_t>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readByteVector(std::vector<int8_t>* val) const;
     status_t            readByteVector(std::optional<std::vector<uint8_t>>* val) const;
-    status_t            readByteVector(std::unique_ptr<std::vector<uint8_t>>* val) const;
+    status_t            readByteVector(std::unique_ptr<std::vector<uint8_t>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readByteVector(std::vector<uint8_t>* val) const;
     status_t            readInt32Vector(std::optional<std::vector<int32_t>>* val) const;
-    status_t            readInt32Vector(std::unique_ptr<std::vector<int32_t>>* val) const;
+    status_t            readInt32Vector(std::unique_ptr<std::vector<int32_t>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readInt32Vector(std::vector<int32_t>* val) const;
     status_t            readInt64Vector(std::optional<std::vector<int64_t>>* val) const;
-    status_t            readInt64Vector(std::unique_ptr<std::vector<int64_t>>* val) const;
+    status_t            readInt64Vector(std::unique_ptr<std::vector<int64_t>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readInt64Vector(std::vector<int64_t>* val) const;
     status_t            readUint64Vector(std::optional<std::vector<uint64_t>>* val) const;
-    status_t            readUint64Vector(std::unique_ptr<std::vector<uint64_t>>* val) const;
+    status_t            readUint64Vector(std::unique_ptr<std::vector<uint64_t>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readUint64Vector(std::vector<uint64_t>* val) const;
     status_t            readFloatVector(std::optional<std::vector<float>>* val) const;
-    status_t            readFloatVector(std::unique_ptr<std::vector<float>>* val) const;
+    status_t            readFloatVector(std::unique_ptr<std::vector<float>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readFloatVector(std::vector<float>* val) const;
     status_t            readDoubleVector(std::optional<std::vector<double>>* val) const;
-    status_t            readDoubleVector(std::unique_ptr<std::vector<double>>* val) const;
+    status_t            readDoubleVector(std::unique_ptr<std::vector<double>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readDoubleVector(std::vector<double>* val) const;
     status_t            readBoolVector(std::optional<std::vector<bool>>* val) const;
-    status_t            readBoolVector(std::unique_ptr<std::vector<bool>>* val) const;
+    status_t            readBoolVector(std::unique_ptr<std::vector<bool>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readBoolVector(std::vector<bool>* val) const;
     status_t            readCharVector(std::optional<std::vector<char16_t>>* val) const;
-    status_t            readCharVector(std::unique_ptr<std::vector<char16_t>>* val) const;
+    status_t            readCharVector(std::unique_ptr<std::vector<char16_t>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readCharVector(std::vector<char16_t>* val) const;
     status_t            readString16Vector(
                             std::optional<std::vector<std::optional<String16>>>* val) const;
     status_t            readString16Vector(
-                            std::unique_ptr<std::vector<std::unique_ptr<String16>>>* val) const;
+                            std::unique_ptr<std::vector<std::unique_ptr<String16>>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readString16Vector(std::vector<String16>* val) const;
     status_t            readUtf8VectorFromUtf16Vector(
                             std::optional<std::vector<std::optional<std::string>>>* val) const;
     status_t            readUtf8VectorFromUtf16Vector(
-                            std::unique_ptr<std::vector<std::unique_ptr<std::string>>>* val) const;
+                            std::unique_ptr<std::vector<std::unique_ptr<std::string>>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readUtf8VectorFromUtf16Vector(std::vector<std::string>* val) const;
 
     template<typename T>
@@ -423,7 +423,7 @@
     template<typename T>
     status_t            resizeOutVector(std::optional<std::vector<T>>* val) const;
     template<typename T>
-    status_t            resizeOutVector(std::unique_ptr<std::vector<T>>* val) const;
+    status_t            resizeOutVector(std::unique_ptr<std::vector<T>>* val) const __attribute__((deprecated("use std::optional version instead")));
     template<typename T>
     status_t            reserveOutVector(std::vector<T>* val, size_t* size) const;
     template<typename T>
@@ -431,7 +431,7 @@
                                          size_t* size) const;
     template<typename T>
     status_t            reserveOutVector(std::unique_ptr<std::vector<T>>* val,
-                                         size_t* size) const;
+                                         size_t* size) const __attribute__((deprecated("use std::optional version instead")));
 
     // Like Parcel.java's readExceptionCode().  Reads the first int32
     // off of a Parcel's header, returning 0 or the negative error
@@ -467,7 +467,7 @@
     status_t            readUniqueFileDescriptorVector(
                             std::optional<std::vector<base::unique_fd>>* val) const;
     status_t            readUniqueFileDescriptorVector(
-                            std::unique_ptr<std::vector<base::unique_fd>>* val) const;
+                            std::unique_ptr<std::vector<base::unique_fd>>* val) const __attribute__((deprecated("use std::optional version instead")));
     status_t            readUniqueFileDescriptorVector(
                             std::vector<base::unique_fd>* val) const;
 
@@ -561,7 +561,7 @@
                                                 status_t(Parcel::*read_func)(T*) const) const;
     template<typename T>
     status_t            readNullableTypedVector(std::unique_ptr<std::vector<T>>* val,
-                                                status_t(Parcel::*read_func)(T*) const) const;
+                                                status_t(Parcel::*read_func)(T*) const) const __attribute__((deprecated("use std::optional version instead")));
     template<typename T>
     status_t            readTypedVector(std::vector<T>* val,
                                         status_t(Parcel::*read_func)(T*) const) const;
@@ -573,13 +573,13 @@
                                                  status_t(Parcel::*write_func)(const T&));
     template<typename T>
     status_t            writeNullableTypedVector(const std::unique_ptr<std::vector<T>>& val,
-                                                 status_t(Parcel::*write_func)(const T&));
+                                                 status_t(Parcel::*write_func)(const T&)) __attribute__((deprecated("use std::optional version instead")));
     template<typename T>
     status_t            writeNullableTypedVector(const std::optional<std::vector<T>>& val,
                                                  status_t(Parcel::*write_func)(T));
     template<typename T>
     status_t            writeNullableTypedVector(const std::unique_ptr<std::vector<T>>& val,
-                                                 status_t(Parcel::*write_func)(T));
+                                                 status_t(Parcel::*write_func)(T)) __attribute__((deprecated("use std::optional version instead")));
     template<typename T>
     status_t            writeTypedVector(const std::vector<T>& val,
                                          status_t(Parcel::*write_func)(const T&));
diff --git a/libs/binder/ndk/ibinder.cpp b/libs/binder/ndk/ibinder.cpp
index 5e2e1bd..350c658 100644
--- a/libs/binder/ndk/ibinder.cpp
+++ b/libs/binder/ndk/ibinder.cpp
@@ -307,7 +307,8 @@
     : onCreate(onCreate),
       onDestroy(onDestroy),
       onTransact(onTransact),
-      mInterfaceDescriptor(interfaceDescriptor) {}
+      mInterfaceDescriptor(interfaceDescriptor),
+      mWideInterfaceDescriptor(interfaceDescriptor) {}
 
 AIBinder_Class* AIBinder_Class_define(const char* interfaceDescriptor,
                                       AIBinder_Class_onCreate onCreate,
@@ -335,6 +336,12 @@
     clazz->handleShellCommand = handleShellCommand;
 }
 
+const char* AIBinder_Class_getDescriptor(const AIBinder_Class* clazz) {
+    CHECK(clazz != nullptr) << "getDescriptor requires non-null clazz";
+
+    return clazz->getInterfaceDescriptorUtf8();
+}
+
 void AIBinder_DeathRecipient::TransferDeathRecipient::binderDied(const wp<IBinder>& who) {
     CHECK(who == mWho);
 
diff --git a/libs/binder/ndk/ibinder_internal.h b/libs/binder/ndk/ibinder_internal.h
index 6236e81..6824306 100644
--- a/libs/binder/ndk/ibinder_internal.h
+++ b/libs/binder/ndk/ibinder_internal.h
@@ -112,7 +112,8 @@
     AIBinder_Class(const char* interfaceDescriptor, AIBinder_Class_onCreate onCreate,
                    AIBinder_Class_onDestroy onDestroy, AIBinder_Class_onTransact onTransact);
 
-    const ::android::String16& getInterfaceDescriptor() const { return mInterfaceDescriptor; }
+    const ::android::String16& getInterfaceDescriptor() const { return mWideInterfaceDescriptor; }
+    const char* getInterfaceDescriptorUtf8() const { return mInterfaceDescriptor.c_str(); }
 
     // required to be non-null, implemented for every class
     const AIBinder_Class_onCreate onCreate = nullptr;
@@ -124,9 +125,11 @@
     AIBinder_handleShellCommand handleShellCommand = nullptr;
 
    private:
+    // Copy of the raw char string for when we don't have to return UTF-16
+    const std::string mInterfaceDescriptor;
     // This must be a String16 since BBinder virtual getInterfaceDescriptor returns a reference to
     // one.
-    const ::android::String16 mInterfaceDescriptor;
+    const ::android::String16 mWideInterfaceDescriptor;
 };
 
 // Ownership is like this (when linked to death):
diff --git a/libs/binder/ndk/include_ndk/android/binder_ibinder.h b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
index ce3d1db..5e1ed46 100644
--- a/libs/binder/ndk/include_ndk/android/binder_ibinder.h
+++ b/libs/binder/ndk/include_ndk/android/binder_ibinder.h
@@ -642,6 +642,23 @@
 
 #endif  //__ANDROID_API__ >= 30
 
+#if __ANDROID_API__ >= 31
+
+/**
+ * Retrieve the class descriptor for the class.
+ *
+ * Available since API level 31.
+ *
+ * \param clazz the class to fetch the descriptor from
+ *
+ * \return the class descriptor string. This pointer will never be null; a
+ * descriptor is required to define a class. The pointer is owned by the class
+ * and will remain valid as long as the class does.
+ */
+const char* AIBinder_Class_getDescriptor(const AIBinder_Class* clazz) __INTRODUCED_IN(31);
+
+#endif  //__ANDROID_API__ >= 31
+
 __END_DECLS
 
 /** @} */
diff --git a/libs/binder/ndk/libbinder_ndk.map.txt b/libs/binder/ndk/libbinder_ndk.map.txt
index 6962f86..e233ffd 100644
--- a/libs/binder/ndk/libbinder_ndk.map.txt
+++ b/libs/binder/ndk/libbinder_ndk.map.txt
@@ -121,6 +121,7 @@
     AServiceManager_registerLazyService; # llndk
     AServiceManager_waitForService; # apex llndk
 
+    AIBinder_Class_getDescriptor;
     AParcel_appendFrom;
     AParcel_create;
     AParcel_getDataSize;
diff --git a/libs/binder/ndk/tests/iface.cpp b/libs/binder/ndk/tests/iface.cpp
index a588985..2afe5d2 100644
--- a/libs/binder/ndk/tests/iface.cpp
+++ b/libs/binder/ndk/tests/iface.cpp
@@ -25,7 +25,7 @@
 
 const char* IFoo::kSomeInstanceName = "libbinder_ndk-test-IFoo";
 const char* IFoo::kInstanceNameToDieFor = "libbinder_ndk-test-IFoo-to-die";
-const char* kIFooDescriptor = "my-special-IFoo-class";
+const char* IFoo::kIFooDescriptor = "my-special-IFoo-class";
 
 struct IFoo_Class_Data {
     sp<IFoo> foo;
diff --git a/libs/binder/ndk/tests/include/iface/iface.h b/libs/binder/ndk/tests/include/iface/iface.h
index d9dd64b..7408d0c 100644
--- a/libs/binder/ndk/tests/include/iface/iface.h
+++ b/libs/binder/ndk/tests/include/iface/iface.h
@@ -27,6 +27,7 @@
    public:
     static const char* kSomeInstanceName;
     static const char* kInstanceNameToDieFor;
+    static const char* kIFooDescriptor;
 
     static AIBinder_Class* kClass;
 
diff --git a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
index f84d9d3..b7df115 100644
--- a/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
+++ b/libs/binder/ndk/tests/libbinder_ndk_unit_test.cpp
@@ -39,6 +39,7 @@
 #include <condition_variable>
 #include <iostream>
 #include <mutex>
+#include "android/binder_ibinder.h"
 
 using namespace android;
 
@@ -543,6 +544,10 @@
     EXPECT_EQ("CMD", shellCmdToString(testService, {"C", "M", "D"}));
 }
 
+TEST(NdkBinder, GetClassInterfaceDescriptor) {
+    ASSERT_STREQ(IFoo::kIFooDescriptor, AIBinder_Class_getDescriptor(IFoo::kClass));
+}
+
 int main(int argc, char* argv[]) {
     ::testing::InitGoogleTest(&argc, argv);
 
diff --git a/libs/binder/parcel_fuzzer/binder.cpp b/libs/binder/parcel_fuzzer/binder.cpp
index a94f06f..394d222 100644
--- a/libs/binder/parcel_fuzzer/binder.cpp
+++ b/libs/binder/parcel_fuzzer/binder.cpp
@@ -86,6 +86,8 @@
     PARCEL_READ_WITH_STATUS(T, FUN), \
     PARCEL_READ_NO_STATUS(T, FUN)
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
 // clang-format off
 std::vector<ParcelRead<::android::Parcel>> BINDER_PARCEL_READ_FUNCTIONS {
     PARCEL_READ_NO_STATUS(size_t, dataSize),
@@ -289,3 +291,4 @@
     PARCEL_READ_WITH_STATUS(android::os::PersistableBundle, readParcelable),
 };
 // clang-format on
+#pragma clang diagnostic pop
diff --git a/libs/binder/tests/schd-dbg.cpp b/libs/binder/tests/schd-dbg.cpp
index ab4c56a..56d958c 100644
--- a/libs/binder/tests/schd-dbg.cpp
+++ b/libs/binder/tests/schd-dbg.cpp
@@ -245,7 +245,7 @@
     double best = (double)m_best / 1.0E6;
     double worst = (double)m_worst / 1.0E6;
     double average = (double)m_total_time / m_transactions / 1.0E6;
-    // FIXME: libjson?
+    // TODO: libjson?
     int W = DUMP_PRESICION + 2;
     cout << setprecision(DUMP_PRESICION) << "{ \"avg\":" << setw(W) << left
          << average << ",\"wst\":" << setw(W) << left << worst
@@ -376,7 +376,7 @@
   if (is_client(num)) {
     int no_trans = iterations * 2;
     double sync_ratio = (1.0 - (double)no_sync / no_trans);
-    // FIXME: libjson?
+    // TODO: libjson?
     cout << "\"P" << (num - server_count) << "\":{\"SYNC\":\""
          << ((sync_ratio > GOOD_SYNC_MIN) ? "GOOD" : "POOR") << "\","
          << "\"S\":" << (no_trans - no_sync) << ",\"I\":" << no_trans << ","
@@ -466,7 +466,7 @@
   }
   vector<Pipe> pipes;
   thread_dump("main");
-  // FIXME: libjson?
+  // TODO: libjson?
   cout << "{" << endl;
   cout << "\"cfg\":{\"pair\":" << (no_process / 2)
        << ",\"iterations\":" << iterations << ",\"deadline_us\":" << deadline_us
@@ -495,7 +495,7 @@
     // detected in the child process
     no_inherent += status;
   }
-  // FIXME: libjson?
+  // TODO: libjson?
   cout << "\"inheritance\": " << (no_inherent == 0 ? "\"PASS\"" : "\"FAIL\"")
        << endl;
   cout << "}" << endl;
diff --git a/libs/vibrator/Android.bp b/libs/vibrator/Android.bp
index e95a080..33ab8ba 100644
--- a/libs/vibrator/Android.bp
+++ b/libs/vibrator/Android.bp
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-cc_library_shared {
+cc_library {
     name: "libvibrator",
 
     shared_libs: [
@@ -45,4 +45,11 @@
     ],
 
     export_include_dirs: ["include"],
+
+    host_supported: true,
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
 }
diff --git a/libs/vibrator/fuzzer/Android.bp b/libs/vibrator/fuzzer/Android.bp
new file mode 100644
index 0000000..8020151
--- /dev/null
+++ b/libs/vibrator/fuzzer/Android.bp
@@ -0,0 +1,43 @@
+/******************************************************************************
+ *
+ * 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.
+ *
+ *****************************************************************************
+ */
+
+cc_fuzz {
+    name: "vibrator_fuzzer",
+
+    host_supported: true,
+
+    srcs: [
+        "vibrator_fuzzer.cpp",
+    ],
+
+    static_libs: [
+        "liblog",
+        "libvibrator",
+    ],
+
+    shared_libs: [
+        "libbinder",
+        "libbase",
+        "libutils",
+    ],
+
+    fuzz_config: {
+        componentid: 155276,
+    },
+}
diff --git a/libs/vibrator/fuzzer/README.md b/libs/vibrator/fuzzer/README.md
new file mode 100644
index 0000000..43eb2d2
--- /dev/null
+++ b/libs/vibrator/fuzzer/README.md
@@ -0,0 +1,65 @@
+# Fuzzer for libvibrator
+
+## Plugin Design Considerations
+This fuzzer fuzzes native code present in libvibrator and does not cover the Java implementation ExternalVibration
+The fuzzer plugin is designed based on the understanding of the
+library and tries to achieve the following:
+
+##### Maximize code coverage
+The configuration parameters are not hardcoded, but instead selected based on
+incoming data. This ensures more code paths are reached by the fuzzer.
+
+libvibrator supports the following parameters:
+1. Uid (parameter name: `uid`)
+2. Package Name (parameter name: `pkg`)
+3. Audio Content Type (parameter name: `content_type`)
+4. Audio Usage (parameter name: `usage`)
+5. Audio Source (parameter name: `source`)
+6. Audio flags (parameter name: `flags`)
+
+| Parameter| Valid Values| Configured Value|
+|------------- |-------------| ----- |
+| `uid` | `INT32_MIN` to `INT32_MAX` | Value obtained from FuzzedDataProvider |
+| `pkg`   | Any std::string value | Value obtained from FuzzedDataProvider |
+| `content_type`   | 0.`AUDIO_CONTENT_TYPE_UNKNOWN` 1.`AUDIO_CONTENT_TYPE_SPEECH` 2.`AUDIO_CONTENT_TYPE_MUSIC` 3.`AUDIO_CONTENT_TYPE_MOVIE` 4.`AUDIO_CONTENT_TYPE_SONIFICATION`| Value obtained from FuzzedDataProvider in the range 0 to 4|
+| `usage`   | 0.`AUDIO_USAGE_UNKNOWN` 1.`AUDIO_USAGE_MEDIA` 2.`AUDIO_USAGE_VOICE_COMMUNICATION` 3.`AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING` 4.`AUDIO_USAGE_ALARM` 5.`AUDIO_USAGE_NOTIFICATION` 6.`AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE`  7.`AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST` 8.`AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT` 9.`AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED` 10.`AUDIO_USAGE_NOTIFICATION_EVENT` 11.`AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY` 12.`AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE` 13.`AUDIO_USAGE_ASSISTANCE_SONIFICATION` 14.`AUDIO_USAGE_GAME` 15.`AUDIO_USAGE_VIRTUAL_SOURCE` 16.`AUDIO_USAGE_ASSISTANT` 17.`AUDIO_USAGE_CALL_ASSISTANT` 18.`AUDIO_USAGE_EMERGENCY` 19.`AUDIO_USAGE_SAFETY` 20.`AUDIO_USAGE_VEHICLE_STATUS` 21.`AUDIO_USAGE_ANNOUNCEMENT`| Value obtained from FuzzedDataProvider in the range 0 to 21|
+| `source`   |  0.`AUDIO_SOURCE_DEFAULT` 1.`AUDIO_SOURCE_MIC` 2.`AUDIO_SOURCE_VOICE_UPLINK` 3.`AUDIO_SOURCE_VOICE_DOWNLINK` 4.`AUDIO_SOURCE_VOICE_CALL` 5.`AUDIO_SOURCE_CAMCORDER` 6.`AUDIO_SOURCE_VOICE_RECOGNITION` 7.`AUDIO_SOURCE_VOICE_COMMUNICATION` 8.`AUDIO_SOURCE_REMOTE_SUBMIX` 9.`AUDIO_SOURCE_UNPROCESSED` 10.`AUDIO_SOURCE_VOICE_PERFORMANCE` 11.`AUDIO_SOURCE_ECHO_REFERENCE` 12.`AUDIO_SOURCE_FM_TUNER` | Value obtained from FuzzedDataProvider in the range 0 to 12 |
+| `flags`   | `UINT32_MIN` to `UINT32_MAX` | Value obtained from FuzzedDataProvider |
+
+This also ensures that the plugin is always deterministic for any given input.
+
+##### Maximize utilization of input data
+The plugin tolerates any kind of input (empty, huge,
+malformed, etc) and doesn't `exit()` on any input and thereby increasing the
+chance of identifying vulnerabilities.
+
+## Build
+
+This describes steps to build vibrator_fuzzer binary.
+
+### Android
+
+#### Steps to build
+Build the fuzzer
+```
+  $ mm -j$(nproc) vibrator_fuzzer
+```
+
+#### Steps to run
+Create a directory CORPUS_DIR and copy some files to that folder
+Push this directory to device.
+
+To run on device
+```
+  $ adb sync data
+  $ adb shell /data/fuzz/arm64/vibrator_fuzzer/vibrator_fuzzer CORPUS_DIR
+```
+
+To run on host
+```
+  $ $ANDROID_HOST_OUT/fuzz/x86_64/vibrator_fuzzer/vibrator_fuzzer CORPUS_DIR
+```
+
+## References:
+ * http://llvm.org/docs/LibFuzzer.html
+ * https://github.com/google/oss-fuzz
diff --git a/libs/vibrator/fuzzer/vibrator_fuzzer.cpp b/libs/vibrator/fuzzer/vibrator_fuzzer.cpp
new file mode 100644
index 0000000..68b3ca6
--- /dev/null
+++ b/libs/vibrator/fuzzer/vibrator_fuzzer.cpp
@@ -0,0 +1,130 @@
+/******************************************************************************
+ *
+ * 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 <binder/Parcel.h>
+#include <fuzzer/FuzzedDataProvider.h>
+#include <vibrator/ExternalVibration.h>
+
+using namespace android;
+
+constexpr size_t MAX_STRING_LENGTH = 100;
+constexpr audio_content_type_t AUDIO_CONTENT_TYPE[] = {AUDIO_CONTENT_TYPE_UNKNOWN,
+                                                       AUDIO_CONTENT_TYPE_SPEECH,
+                                                       AUDIO_CONTENT_TYPE_MUSIC,
+                                                       AUDIO_CONTENT_TYPE_MOVIE,
+                                                       AUDIO_CONTENT_TYPE_SONIFICATION};
+constexpr audio_usage_t AUDIO_USAGE[] = {
+        AUDIO_USAGE_UNKNOWN,
+        AUDIO_USAGE_MEDIA,
+        AUDIO_USAGE_VOICE_COMMUNICATION,
+        AUDIO_USAGE_VOICE_COMMUNICATION_SIGNALLING,
+        AUDIO_USAGE_ALARM,
+        AUDIO_USAGE_NOTIFICATION,
+        AUDIO_USAGE_NOTIFICATION_TELEPHONY_RINGTONE,
+        AUDIO_USAGE_NOTIFICATION_COMMUNICATION_REQUEST,
+        AUDIO_USAGE_NOTIFICATION_COMMUNICATION_INSTANT,
+        AUDIO_USAGE_NOTIFICATION_COMMUNICATION_DELAYED,
+        AUDIO_USAGE_NOTIFICATION_EVENT,
+        AUDIO_USAGE_ASSISTANCE_ACCESSIBILITY,
+        AUDIO_USAGE_ASSISTANCE_NAVIGATION_GUIDANCE,
+        AUDIO_USAGE_ASSISTANCE_SONIFICATION,
+        AUDIO_USAGE_GAME,
+        AUDIO_USAGE_VIRTUAL_SOURCE,
+        AUDIO_USAGE_ASSISTANT,
+        AUDIO_USAGE_CALL_ASSISTANT,
+        AUDIO_USAGE_EMERGENCY,
+        AUDIO_USAGE_SAFETY,
+        AUDIO_USAGE_VEHICLE_STATUS,
+        AUDIO_USAGE_ANNOUNCEMENT,
+};
+constexpr audio_source_t AUDIO_SOURCE[] = {
+        AUDIO_SOURCE_DEFAULT,           AUDIO_SOURCE_MIC,
+        AUDIO_SOURCE_VOICE_UPLINK,      AUDIO_SOURCE_VOICE_DOWNLINK,
+        AUDIO_SOURCE_VOICE_CALL,        AUDIO_SOURCE_CAMCORDER,
+        AUDIO_SOURCE_VOICE_RECOGNITION, AUDIO_SOURCE_VOICE_COMMUNICATION,
+        AUDIO_SOURCE_REMOTE_SUBMIX,     AUDIO_SOURCE_UNPROCESSED,
+        AUDIO_SOURCE_VOICE_PERFORMANCE, AUDIO_SOURCE_ECHO_REFERENCE,
+        AUDIO_SOURCE_FM_TUNER,
+};
+constexpr size_t NUM_AUDIO_CONTENT_TYPE = std::size(AUDIO_CONTENT_TYPE);
+constexpr size_t NUM_AUDIO_USAGE = std::size(AUDIO_USAGE);
+constexpr size_t NUM_AUDIO_SOURCE = std::size(AUDIO_SOURCE);
+
+class TestVibrationController : public os::IExternalVibrationController {
+public:
+    explicit TestVibrationController() {}
+    IBinder *onAsBinder() override { return nullptr; }
+    binder::Status mute(/*out*/ bool *ret) override {
+        *ret = false;
+        return binder::Status::ok();
+    };
+    binder::Status unmute(/*out*/ bool *ret) override {
+        *ret = false;
+        return binder::Status::ok();
+    };
+};
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    if (size < 1) {
+        return 0;
+    }
+    FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
+    // Initialize the parameters using FuzzedDataProvider
+    int32_t uid = fdp.ConsumeIntegral<int32_t>();
+    std::string pkg = fdp.ConsumeRandomLengthString(MAX_STRING_LENGTH);
+    audio_attributes_t attributes;
+    attributes.content_type =
+            AUDIO_CONTENT_TYPE[fdp.ConsumeIntegralInRange<uint32_t>(0, NUM_AUDIO_CONTENT_TYPE - 1)];
+    attributes.usage = AUDIO_USAGE[fdp.ConsumeIntegralInRange<uint32_t>(0, NUM_AUDIO_USAGE - 1)];
+    attributes.source = AUDIO_SOURCE[fdp.ConsumeIntegralInRange<uint32_t>(0, NUM_AUDIO_SOURCE - 1)];
+    attributes.flags = static_cast<audio_flags_mask_t>(fdp.ConsumeIntegral<uint32_t>());
+
+    // Create an instance of TestVibrationController
+    sp<TestVibrationController> vibrationController = new TestVibrationController();
+    if (!vibrationController) {
+        return 0;
+    }
+
+    // Set all the parameters in the constructor call
+    sp<os::ExternalVibration> extVibration =
+            new os::ExternalVibration(uid, pkg, attributes, vibrationController);
+    if (!extVibration) {
+        return 0;
+    }
+
+    // Get all the parameters that were previously set
+    extVibration->getUid();
+    extVibration->getPackage();
+    extVibration->getAudioAttributes();
+    extVibration->getController();
+
+    // Set the parameters in a Parcel object and send it to libvibrator
+    // This parcel shall be read by libvibrator
+    Parcel parcel;
+    parcel.writeInt32(uid);
+    parcel.writeString16(String16(pkg.c_str()));
+    parcel.writeStrongBinder(IInterface::asBinder(vibrationController));
+    parcel.setDataPosition(0);
+    extVibration->readFromParcel(&parcel);
+
+    // Send a Parcel to libvibrator
+    // Parameters shall be written to this parcel by libvibrator
+    extVibration->writeToParcel(&parcel);
+    return 0;
+}