Add marshal() and unmarshal() APIs.
Expose marshal/unmarshal APIs from binder_ndk because we need
to pass large data that exceeds binder memory limitation across
binder for auto use case. We need to serialize parcel to a shared
memory file and unmarshal it into a parcel. We would only marshal
stable AIDL generated parcelable.
Test: Add a unit test to CTS.
Bug: 197781220
Change-Id: I774663d619ad0ca04f23044d2245021b265b32c1
diff --git a/libs/binder/ndk/parcel.cpp b/libs/binder/ndk/parcel.cpp
index b2f21c7..c320e8d 100644
--- a/libs/binder/ndk/parcel.cpp
+++ b/libs/binder/ndk/parcel.cpp
@@ -673,4 +673,32 @@
return new AParcel(nullptr);
}
+binder_status_t AParcel_marshal(const AParcel* parcel, uint8_t* buffer, size_t start, size_t len) {
+ if (parcel->get()->objectsCount()) {
+ return STATUS_INVALID_OPERATION;
+ }
+ int32_t dataSize = AParcel_getDataSize(parcel);
+ if (len > static_cast<size_t>(dataSize) || start > static_cast<size_t>(dataSize) - len) {
+ return STATUS_BAD_VALUE;
+ }
+ const uint8_t* internalBuffer = parcel->get()->data();
+ memcpy(buffer, internalBuffer + start, len);
+ return STATUS_OK;
+}
+
+binder_status_t AParcel_unmarshal(AParcel* parcel, const uint8_t* buffer, size_t len) {
+ status_t status = parcel->get()->setDataSize(len);
+ if (status != ::android::OK) {
+ return PruneStatusT(status);
+ }
+ parcel->get()->setDataPosition(0);
+
+ void* raw = parcel->get()->writeInplace(len);
+ if (raw == nullptr) {
+ return STATUS_NO_MEMORY;
+ }
+ memcpy(raw, buffer, len);
+ return STATUS_OK;
+}
+
// @END