libbinder: Support sp<Flattenable> in SafeInterface
Adds support for sending and receiving sp<Flattenable> parameters (such
as sp<Fence> and sp<GraphicBuffer>) as part of a SafeInterface.
Test: New test in binderSafeInterfaceTest
Change-Id: I36ba19c7f121771e9a7acfde9ed164e1cd3200b3
diff --git a/libs/binder/include/binder/SafeInterface.h b/libs/binder/include/binder/SafeInterface.h
index 1a53522..5203704 100644
--- a/libs/binder/include/binder/SafeInterface.h
+++ b/libs/binder/include/binder/SafeInterface.h
@@ -55,6 +55,17 @@
return callParcel("write(Flattenable)", [&]() { return parcel->write(t); });
}
template <typename T>
+ typename std::enable_if<std::is_base_of<Flattenable<T>, T>::value, status_t>::type read(
+ const Parcel& parcel, sp<T>* t) const {
+ *t = new T{};
+ return callParcel("read(sp<Flattenable>)", [&]() { return parcel.read(*(t->get())); });
+ }
+ template <typename T>
+ typename std::enable_if<std::is_base_of<Flattenable<T>, T>::value, status_t>::type write(
+ Parcel* parcel, const sp<T>& t) const {
+ return callParcel("write(sp<Flattenable>)", [&]() { return parcel->write(*(t.get())); });
+ }
+ template <typename T>
typename std::enable_if<std::is_base_of<LightFlattenable<T>, T>::value, status_t>::type read(
const Parcel& parcel, T* t) const {
return callParcel("read(LightFlattenable)", [&]() { return parcel.read(*t); });
@@ -81,7 +92,8 @@
return callParcel("writeString8", [&]() { return parcel->writeString8(str); });
}
template <typename T>
- status_t read(const Parcel& parcel, sp<T>* pointer) const {
+ typename std::enable_if<std::is_same<IBinder, T>::value, status_t>::type read(
+ const Parcel& parcel, sp<T>* pointer) const {
return callParcel("readNullableStrongBinder",
[&]() { return parcel.readNullableStrongBinder(pointer); });
}
@@ -92,6 +104,12 @@
[&]() { return parcel->writeStrongBinder(pointer); });
}
template <typename T>
+ typename std::enable_if<std::is_base_of<IInterface, T>::value, status_t>::type read(
+ const Parcel& parcel, sp<T>* pointer) const {
+ return callParcel("readNullableStrongBinder[IInterface]",
+ [&]() { return parcel.readNullableStrongBinder(pointer); });
+ }
+ template <typename T>
typename std::enable_if<std::is_base_of<IInterface, T>::value, status_t>::type write(
Parcel* parcel, const sp<T>& interface) const {
return write(parcel, IInterface::asBinder(interface));
diff --git a/libs/binder/tests/binderSafeInterfaceTest.cpp b/libs/binder/tests/binderSafeInterfaceTest.cpp
index 26b0cc2..70f4900 100644
--- a/libs/binder/tests/binderSafeInterfaceTest.cpp
+++ b/libs/binder/tests/binderSafeInterfaceTest.cpp
@@ -28,6 +28,8 @@
#include <gtest/gtest.h>
#pragma clang diagnostic pop
+#include <utils/LightRefBase.h>
+
#include <optional>
using namespace std::chrono_literals; // NOLINT - google-build-using-namespace
@@ -90,6 +92,30 @@
int32_t value = 0;
};
+// It seems like this should be able to inherit from TestFlattenable (to avoid duplicating code),
+// but the SafeInterface logic can't easily be extended to find an indirect Flattenable<T>
+// base class
+class TestLightRefBaseFlattenable : public Flattenable<TestLightRefBaseFlattenable>,
+ public LightRefBase<TestLightRefBaseFlattenable> {
+public:
+ TestLightRefBaseFlattenable() = default;
+ explicit TestLightRefBaseFlattenable(int32_t v) : value(v) {}
+
+ // Flattenable protocol
+ size_t getFlattenedSize() const { return sizeof(value); }
+ size_t getFdCount() const { return 0; }
+ status_t flatten(void*& buffer, size_t& size, int*& /*fds*/, size_t& /*count*/) const {
+ FlattenableUtils::write(buffer, size, value);
+ return NO_ERROR;
+ }
+ status_t unflatten(void const*& buffer, size_t& size, int const*& /*fds*/, size_t& /*count*/) {
+ FlattenableUtils::read(buffer, size, value);
+ return NO_ERROR;
+ }
+
+ int32_t value = 0;
+};
+
class ExitOnDeath : public IBinder::DeathRecipient {
public:
~ExitOnDeath() override = default;
@@ -163,6 +189,7 @@
LogicalNot,
IncrementFlattenable,
IncrementLightFlattenable,
+ IncrementLightRefBaseFlattenable,
IncrementNoCopyNoMove,
ToUpper,
CallMeBack,
@@ -186,6 +213,8 @@
virtual status_t increment(const TestFlattenable& a, TestFlattenable* aPlusOne) const = 0;
virtual status_t increment(const TestLightFlattenable& a,
TestLightFlattenable* aPlusOne) const = 0;
+ virtual status_t increment(const sp<TestLightRefBaseFlattenable>& a,
+ sp<TestLightRefBaseFlattenable>* aPlusOne) const = 0;
virtual status_t increment(const NoCopyNoMove& a, NoCopyNoMove* aPlusOne) const = 0;
virtual status_t toUpper(const String8& str, String8* upperStr) const = 0;
// As mentioned above, sp<IBinder> is already tested by setDeathToken
@@ -230,6 +259,12 @@
ALOG(LOG_INFO, getLogTag(), "%s", __PRETTY_FUNCTION__);
return callRemote<Signature>(Tag::IncrementLightFlattenable, a, aPlusOne);
}
+ status_t increment(const sp<TestLightRefBaseFlattenable>& a,
+ sp<TestLightRefBaseFlattenable>* aPlusOne) const override {
+ using Signature = status_t (ISafeInterfaceTest::*)(const sp<TestLightRefBaseFlattenable>&,
+ sp<TestLightRefBaseFlattenable>*) const;
+ return callRemote<Signature>(Tag::IncrementLightRefBaseFlattenable, a, aPlusOne);
+ }
status_t increment(const NoCopyNoMove& a, NoCopyNoMove* aPlusOne) const override {
ALOG(LOG_INFO, getLogTag(), "%s", __PRETTY_FUNCTION__);
using Signature = status_t (ISafeInterfaceTest::*)(const NoCopyNoMove& a,
@@ -315,6 +350,12 @@
aPlusOne->value = a.value + 1;
return NO_ERROR;
}
+ status_t increment(const sp<TestLightRefBaseFlattenable>& a,
+ sp<TestLightRefBaseFlattenable>* aPlusOne) const override {
+ ALOG(LOG_INFO, getLogTag(), "%s", __PRETTY_FUNCTION__);
+ *aPlusOne = new TestLightRefBaseFlattenable(a->value + 1);
+ return NO_ERROR;
+ }
status_t increment(const NoCopyNoMove& a, NoCopyNoMove* aPlusOne) const override {
ALOG(LOG_INFO, getLogTag(), "%s", __PRETTY_FUNCTION__);
aPlusOne->setValue(a.getValue() + 1);
@@ -384,6 +425,12 @@
TestLightFlattenable* aPlusOne) const;
return callLocal<Signature>(data, reply, &ISafeInterfaceTest::increment);
}
+ case ISafeInterfaceTest::Tag::IncrementLightRefBaseFlattenable: {
+ using Signature =
+ status_t (ISafeInterfaceTest::*)(const sp<TestLightRefBaseFlattenable>&,
+ sp<TestLightRefBaseFlattenable>*) const;
+ return callLocal<Signature>(data, reply, &ISafeInterfaceTest::increment);
+ }
case ISafeInterfaceTest::Tag::IncrementNoCopyNoMove: {
using Signature = status_t (ISafeInterfaceTest::*)(const NoCopyNoMove& a,
NoCopyNoMove* aPlusOne) const;
@@ -513,6 +560,15 @@
ASSERT_EQ(a.value + 1, aPlusOne.value);
}
+TEST_F(SafeInterfaceTest, TestIncrementLightRefBaseFlattenable) {
+ sp<TestLightRefBaseFlattenable> a = new TestLightRefBaseFlattenable{1};
+ sp<TestLightRefBaseFlattenable> aPlusOne;
+ status_t result = mSafeInterfaceTest->increment(a, &aPlusOne);
+ ASSERT_EQ(NO_ERROR, result);
+ ASSERT_NE(nullptr, aPlusOne.get());
+ ASSERT_EQ(a->value + 1, aPlusOne->value);
+}
+
TEST_F(SafeInterfaceTest, TestIncrementNoCopyNoMove) {
const NoCopyNoMove a{1};
NoCopyNoMove aPlusOne{0};