libbinder: Status writeOverParcel
For errors written to the parcel late.
Bug: 211823183
Test: aidl_integration_test
Change-Id: I036a016e143408bf1c3cb4f67f622c7e0dac91bf
diff --git a/libs/binder/Status.cpp b/libs/binder/Status.cpp
index a44c578..83b97d0 100644
--- a/libs/binder/Status.cpp
+++ b/libs/binder/Status.cpp
@@ -211,6 +211,12 @@
return status;
}
+status_t Status::writeOverParcel(Parcel* parcel) const {
+ parcel->setDataSize(0);
+ parcel->setDataPosition(0);
+ return writeToParcel(parcel);
+}
+
void Status::setException(int32_t ex, const String8& message) {
mException = ex;
mErrorCode = ex == EX_TRANSACTION_FAILED ? FAILED_TRANSACTION : NO_ERROR;
diff --git a/libs/binder/include/binder/Status.h b/libs/binder/include/binder/Status.h
index aaafa36..af34695 100644
--- a/libs/binder/include/binder/Status.h
+++ b/libs/binder/include/binder/Status.h
@@ -117,6 +117,10 @@
status_t readFromParcel(const Parcel& parcel);
status_t writeToParcel(Parcel* parcel) const;
+ // Convenience API to replace a Parcel with a status value, w/o requiring
+ // calling multiple APIs (makes generated code smaller).
+ status_t writeOverParcel(Parcel* parcel) const;
+
// Set one of the pre-defined exception types defined above.
void setException(int32_t ex, const String8& message);
// Set a service specific exception with error code.
diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index 5e5c495..2ce00b2 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -98,6 +98,7 @@
srcs: [
"binderParcelUnitTest.cpp",
"binderBinderUnitTest.cpp",
+ "binderStatusUnitTest.cpp",
],
shared_libs: [
"libbinder",
diff --git a/libs/binder/tests/binderStatusUnitTest.cpp b/libs/binder/tests/binderStatusUnitTest.cpp
new file mode 100644
index 0000000..a32ec5c
--- /dev/null
+++ b/libs/binder/tests/binderStatusUnitTest.cpp
@@ -0,0 +1,35 @@
+/*
+ * 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 <binder/Status.h>
+#include <gtest/gtest.h>
+
+using android::Parcel;
+using android::binder::Status;
+
+TEST(Status, WriteOverParcel) {
+ Status status = Status::fromExceptionCode(Status::EX_NULL_POINTER);
+
+ Parcel indirect;
+ indirect.writeInt32(64);
+ status.writeOverParcel(&indirect);
+
+ Parcel direct;
+ status.writeToParcel(&direct);
+
+ EXPECT_EQ(0, indirect.compareData(direct));
+}