libs/binder/tests/binderRpcUniversalTests.cpp - LeafOS-Project/android_frameworks_native - Gitiles

 /*
  * Copyright (C) 2022 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 <chrono>
 #include <cstdlib>
 #include <type_traits>

 #include "binderRpcTestCommon.h"
 #include "binderRpcTestFixture.h"

 using namespace std::chrono_literals;
 using namespace std::placeholders;
 using testing::AssertionFailure;
 using testing::AssertionResult;
 using testing::AssertionSuccess;

 namespace android {

 static_assert(RPC_WIRE_PROTOCOL_VERSION + 1 == RPC_WIRE_PROTOCOL_VERSION_NEXT ||
               RPC_WIRE_PROTOCOL_VERSION == RPC_WIRE_PROTOCOL_VERSION_EXPERIMENTAL);

 TEST(BinderRpcParcel, EntireParcelFormatted) {
     Parcel p;
     p.writeInt32(3);

     EXPECT_DEATH_IF_SUPPORTED(p.markForBinder(sp<BBinder>::make()),
                               "format must be set before data is written");
 }

 TEST(BinderRpc, CannotUseNextWireVersion) {
     auto session = RpcSession::make();
     EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT));
     EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT + 1));
     EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT + 2));
     EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT + 15));
 }

 TEST(BinderRpc, CanUseExperimentalWireVersion) {
     auto session = RpcSession::make();
     EXPECT_EQ(hasExperimentalRpc(),
               session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_EXPERIMENTAL));
 }

 TEST_P(BinderRpc, Ping) {
     auto proc = createRpcTestSocketServerProcess({});
     ASSERT_NE(proc.rootBinder, nullptr);
     EXPECT_EQ(OK, proc.rootBinder->pingBinder());
 }

 TEST_P(BinderRpc, GetInterfaceDescriptor) {
     auto proc = createRpcTestSocketServerProcess({});
     ASSERT_NE(proc.rootBinder, nullptr);
     EXPECT_EQ(IBinderRpcTest::descriptor, proc.rootBinder->getInterfaceDescriptor());
 }

 TEST_P(BinderRpc, MultipleSessions) {
     if (serverSingleThreaded()) {
         // Tests with multiple sessions require a multi-threaded service,
         // but work fine on a single-threaded client
         GTEST_SKIP() << "This test requires a multi-threaded service";
     }

     auto proc = createRpcTestSocketServerProcess({.numThreads = 1, .numSessions = 5});
     for (auto session : proc.proc->sessions) {
         ASSERT_NE(nullptr, session.root);
         EXPECT_EQ(OK, session.root->pingBinder());
     }
 }

 TEST_P(BinderRpc, SeparateRootObject) {
     if (serverSingleThreaded()) {
         GTEST_SKIP() << "This test requires a multi-threaded service";
     }

     SocketType type = GetParam().type;
     if (type == SocketType::PRECONNECTED || type == SocketType::UNIX ||
         type == SocketType::UNIX_BOOTSTRAP || type == SocketType::UNIX_RAW) {
         // we can't get port numbers for unix sockets
         return;
     }

     auto proc = createRpcTestSocketServerProcess({.numSessions = 2});

     int port1 = 0;
     EXPECT_OK(proc.rootIface->getClientPort(&port1));

     sp<IBinderRpcTest> rootIface2 = interface_cast<IBinderRpcTest>(proc.proc->sessions.at(1).root);
     int port2;
     EXPECT_OK(rootIface2->getClientPort(&port2));

     // we should have a different IBinderRpcTest object created for each
     // session, because we use setPerSessionRootObject
     EXPECT_NE(port1, port2);
 }

 TEST_P(BinderRpc, TransactionsMustBeMarkedRpc) {
     auto proc = createRpcTestSocketServerProcess({});
     Parcel data;
     Parcel reply;
     EXPECT_EQ(BAD_TYPE, proc.rootBinder->transact(IBinder::PING_TRANSACTION, data, &reply, 0));
 }

 TEST_P(BinderRpc, AppendSeparateFormats) {
     if (socketType() == SocketType::TIPC) {
         GTEST_SKIP() << "Trusty does not support multiple server processes";
     }

     auto proc1 = createRpcTestSocketServerProcess({});
     auto proc2 = createRpcTestSocketServerProcess({});

     Parcel pRaw;

     Parcel p1;
     p1.markForBinder(proc1.rootBinder);
     p1.writeInt32(3);

     EXPECT_EQ(BAD_TYPE, p1.appendFrom(&pRaw, 0, pRaw.dataSize()));
     EXPECT_EQ(BAD_TYPE, pRaw.appendFrom(&p1, 0, p1.dataSize()));

     Parcel p2;
     p2.markForBinder(proc2.rootBinder);
     p2.writeInt32(7);

     EXPECT_EQ(BAD_TYPE, p1.appendFrom(&p2, 0, p2.dataSize()));
     EXPECT_EQ(BAD_TYPE, p2.appendFrom(&p1, 0, p1.dataSize()));
 }

 TEST_P(BinderRpc, UnknownTransaction) {
     auto proc = createRpcTestSocketServerProcess({});
     Parcel data;
     data.markForBinder(proc.rootBinder);
     Parcel reply;
     EXPECT_EQ(UNKNOWN_TRANSACTION, proc.rootBinder->transact(1337, data, &reply, 0));
 }

 TEST_P(BinderRpc, SendSomethingOneway) {
     auto proc = createRpcTestSocketServerProcess({});
     EXPECT_OK(proc.rootIface->sendString("asdf"));
 }

 TEST_P(BinderRpc, SendAndGetResultBack) {
     auto proc = createRpcTestSocketServerProcess({});
     std::string doubled;
     EXPECT_OK(proc.rootIface->doubleString("cool ", &doubled));
     EXPECT_EQ("cool cool ", doubled);
 }

 TEST_P(BinderRpc, SendAndGetResultBackBig) {
     auto proc = createRpcTestSocketServerProcess({});
     // Trusty has a limit of 4096 bytes for the entire RPC Binder message
     size_t singleLen = socketType() == SocketType::TIPC ? 512 : 4096;
     std::string single = std::string(singleLen, 'a');
     std::string doubled;
     EXPECT_OK(proc.rootIface->doubleString(single, &doubled));
     EXPECT_EQ(single + single, doubled);
 }

 TEST_P(BinderRpc, InvalidNullBinderReturn) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinder> outBinder;
     EXPECT_EQ(proc.rootIface->getNullBinder(&outBinder).transactionError(), UNEXPECTED_NULL);
 }

 TEST_P(BinderRpc, CallMeBack) {
     auto proc = createRpcTestSocketServerProcess({});

     int32_t pingResult;
     EXPECT_OK(proc.rootIface->pingMe(new MyBinderRpcSession("foo"), &pingResult));
     EXPECT_EQ(OK, pingResult);

     EXPECT_EQ(0, MyBinderRpcSession::gNum);
 }

 TEST_P(BinderRpc, RepeatBinder) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinder> inBinder = new MyBinderRpcSession("foo");
     sp<IBinder> outBinder;
     EXPECT_OK(proc.rootIface->repeatBinder(inBinder, &outBinder));
     EXPECT_EQ(inBinder, outBinder);

     wp<IBinder> weak = inBinder;
     inBinder = nullptr;
     outBinder = nullptr;

     // Force reading a reply, to process any pending dec refs from the other
     // process (the other process will process dec refs there before processing
     // the ping here).
     EXPECT_EQ(OK, proc.rootBinder->pingBinder());

     EXPECT_EQ(nullptr, weak.promote());

     EXPECT_EQ(0, MyBinderRpcSession::gNum);
 }

 TEST_P(BinderRpc, RepeatTheirBinder) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinderRpcSession> session;
     EXPECT_OK(proc.rootIface->openSession("aoeu", &session));

     sp<IBinder> inBinder = IInterface::asBinder(session);
     sp<IBinder> outBinder;
     EXPECT_OK(proc.rootIface->repeatBinder(inBinder, &outBinder));
     EXPECT_EQ(inBinder, outBinder);

     wp<IBinder> weak = inBinder;
     session = nullptr;
     inBinder = nullptr;
     outBinder = nullptr;

     // Force reading a reply, to process any pending dec refs from the other
     // process (the other process will process dec refs there before processing
     // the ping here).
     EXPECT_EQ(OK, proc.rootBinder->pingBinder());

     EXPECT_EQ(nullptr, weak.promote());
 }

 TEST_P(BinderRpc, RepeatBinderNull) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinder> outBinder;
     EXPECT_OK(proc.rootIface->repeatBinder(nullptr, &outBinder));
     EXPECT_EQ(nullptr, outBinder);
 }

 TEST_P(BinderRpc, HoldBinder) {
     auto proc = createRpcTestSocketServerProcess({});

     IBinder* ptr = nullptr;
     {
         sp<IBinder> binder = new BBinder();
         ptr = binder.get();
         EXPECT_OK(proc.rootIface->holdBinder(binder));
     }

     sp<IBinder> held;
     EXPECT_OK(proc.rootIface->getHeldBinder(&held));

     EXPECT_EQ(held.get(), ptr);

     // stop holding binder, because we test to make sure references are cleaned
     // up
     EXPECT_OK(proc.rootIface->holdBinder(nullptr));
     // and flush ref counts
     EXPECT_EQ(OK, proc.rootBinder->pingBinder());
 }

 // START TESTS FOR LIMITATIONS OF SOCKET BINDER
 // These are behavioral differences form regular binder, where certain usecases
 // aren't supported.

 TEST_P(BinderRpc, CannotMixBindersBetweenUnrelatedSocketSessions) {
     if (socketType() == SocketType::TIPC) {
         GTEST_SKIP() << "Trusty does not support multiple server processes";
     }

     auto proc1 = createRpcTestSocketServerProcess({});
     auto proc2 = createRpcTestSocketServerProcess({});

     sp<IBinder> outBinder;
     EXPECT_EQ(INVALID_OPERATION,
               proc1.rootIface->repeatBinder(proc2.rootBinder, &outBinder).transactionError());
 }

 TEST_P(BinderRpc, CannotMixBindersBetweenTwoSessionsToTheSameServer) {
     if (serverSingleThreaded()) {
         GTEST_SKIP() << "This test requires a multi-threaded service";
     }

     auto proc = createRpcTestSocketServerProcess({.numThreads = 1, .numSessions = 2});

     sp<IBinder> outBinder;
     EXPECT_EQ(INVALID_OPERATION,
               proc.rootIface->repeatBinder(proc.proc->sessions.at(1).root, &outBinder)
                       .transactionError());
 }

 TEST_P(BinderRpc, CannotSendRegularBinderOverSocketBinder) {
     if (!kEnableKernelIpc || noKernel()) {
         GTEST_SKIP() << "Test disabled because Binder kernel driver was disabled "
                         "at build time.";
     }

     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinder> someRealBinder = IInterface::asBinder(defaultServiceManager());
     sp<IBinder> outBinder;
     EXPECT_EQ(INVALID_OPERATION,
               proc.rootIface->repeatBinder(someRealBinder, &outBinder).transactionError());
 }

 TEST_P(BinderRpc, CannotSendSocketBinderOverRegularBinder) {
     if (!kEnableKernelIpc || noKernel()) {
         GTEST_SKIP() << "Test disabled because Binder kernel driver was disabled "
                         "at build time.";
     }

     auto proc = createRpcTestSocketServerProcess({});

     // for historical reasons, IServiceManager interface only returns the
     // exception code
     EXPECT_EQ(binder::Status::EX_TRANSACTION_FAILED,
               defaultServiceManager()->addService(String16("not_suspicious"), proc.rootBinder));
 }

 // END TESTS FOR LIMITATIONS OF SOCKET BINDER

 TEST_P(BinderRpc, RepeatRootObject) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinder> outBinder;
     EXPECT_OK(proc.rootIface->repeatBinder(proc.rootBinder, &outBinder));
     EXPECT_EQ(proc.rootBinder, outBinder);
 }

 TEST_P(BinderRpc, NestedTransactions) {
     auto fileDescriptorTransportMode = RpcSession::FileDescriptorTransportMode::UNIX;
     if (socketType() == SocketType::TIPC) {
         // TIPC does not support file descriptors yet
         fileDescriptorTransportMode = RpcSession::FileDescriptorTransportMode::NONE;
     }
     auto proc = createRpcTestSocketServerProcess({
             // Enable FD support because it uses more stack space and so represents
             // something closer to a worst case scenario.
             .clientFileDescriptorTransportMode = fileDescriptorTransportMode,
             .serverSupportedFileDescriptorTransportModes = {fileDescriptorTransportMode},
     });

     auto nastyNester = sp<MyBinderRpcTestDefault>::make();
     EXPECT_OK(proc.rootIface->nestMe(nastyNester, 10));

     wp<IBinder> weak = nastyNester;
     nastyNester = nullptr;
     EXPECT_EQ(nullptr, weak.promote());
 }

 TEST_P(BinderRpc, SameBinderEquality) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinder> a;
     EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&a));

     sp<IBinder> b;
     EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&b));

     EXPECT_EQ(a, b);
 }

 TEST_P(BinderRpc, SameBinderEqualityWeak) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinder> a;
     EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&a));
     wp<IBinder> weak = a;
     a = nullptr;

     sp<IBinder> b;
     EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&b));

     // this is the wrong behavior, since BpBinder
     // doesn't implement onIncStrongAttempted
     // but make sure there is no crash
     EXPECT_EQ(nullptr, weak.promote());

     GTEST_SKIP() << "Weak binders aren't currently re-promotable for RPC binder.";

     // In order to fix this:
     // - need to have incStrongAttempted reflected across IPC boundary (wait for
     //   response to promote - round trip...)
     // - sendOnLastWeakRef, to delete entries out of RpcState table
     EXPECT_EQ(b, weak.promote());
 }

 #define EXPECT_SESSIONS(expected, iface)                  \
     do {                                                  \
         int session;                                      \
         EXPECT_OK((iface)->getNumOpenSessions(&session)); \
         EXPECT_EQ(static_cast<int>(expected), session);   \
     } while (false)

 TEST_P(BinderRpc, SingleSession) {
     auto proc = createRpcTestSocketServerProcess({});

     sp<IBinderRpcSession> session;
     EXPECT_OK(proc.rootIface->openSession("aoeu", &session));
     std::string out;
     EXPECT_OK(session->getName(&out));
     EXPECT_EQ("aoeu", out);

     EXPECT_SESSIONS(1, proc.rootIface);
     session = nullptr;
     EXPECT_SESSIONS(0, proc.rootIface);
 }

 TEST_P(BinderRpc, ManySessions) {
     auto proc = createRpcTestSocketServerProcess({});

     std::vector<sp<IBinderRpcSession>> sessions;

     for (size_t i = 0; i < 15; i++) {
         EXPECT_SESSIONS(i, proc.rootIface);
         sp<IBinderRpcSession> session;
         EXPECT_OK(proc.rootIface->openSession(std::to_string(i), &session));
         sessions.push_back(session);
     }
     EXPECT_SESSIONS(sessions.size(), proc.rootIface);
     for (size_t i = 0; i < sessions.size(); i++) {
         std::string out;
         EXPECT_OK(sessions.at(i)->getName(&out));
         EXPECT_EQ(std::to_string(i), out);
     }
     EXPECT_SESSIONS(sessions.size(), proc.rootIface);

     while (!sessions.empty()) {
         sessions.pop_back();
         EXPECT_SESSIONS(sessions.size(), proc.rootIface);
     }
     EXPECT_SESSIONS(0, proc.rootIface);
 }

 TEST_P(BinderRpc, OnewayCallDoesNotWait) {
     constexpr size_t kReallyLongTimeMs = 100;
     constexpr size_t kSleepMs = kReallyLongTimeMs * 5;

     auto proc = createRpcTestSocketServerProcess({});

     size_t epochMsBefore = epochMillis();

     EXPECT_OK(proc.rootIface->sleepMsAsync(kSleepMs));

     size_t epochMsAfter = epochMillis();
     EXPECT_LT(epochMsAfter, epochMsBefore + kReallyLongTimeMs);
 }

 TEST_P(BinderRpc, Callbacks) {
     const static std::string kTestString = "good afternoon!";

     for (bool callIsOneway : {true, false}) {
         for (bool callbackIsOneway : {true, false}) {
             for (bool delayed : {true, false}) {
                 if (clientOrServerSingleThreaded() &&
                     (callIsOneway || callbackIsOneway || delayed)) {
                     // we have no incoming connections to receive the callback
                     continue;
                 }

                 size_t numIncomingConnections = clientOrServerSingleThreaded() ? 0 : 1;
                 auto proc = createRpcTestSocketServerProcess(
                         {.numThreads = 1,
                          .numSessions = 1,
                          .numIncomingConnectionsBySession = {numIncomingConnections}});
                 auto cb = sp<MyBinderRpcCallback>::make();

                 if (callIsOneway) {
                     EXPECT_OK(proc.rootIface->doCallbackAsync(cb, callbackIsOneway, delayed,
                                                               kTestString));
                 } else {
                     EXPECT_OK(
                             proc.rootIface->doCallback(cb, callbackIsOneway, delayed, kTestString));
                 }

                 // if both transactions are synchronous and the response is sent back on the
                 // same thread, everything should have happened in a nested call. Otherwise,
                 // the callback will be processed on another thread.
                 if (callIsOneway || callbackIsOneway || delayed) {
                     using std::literals::chrono_literals::operator""s;
                     RpcMutexUniqueLock _l(cb->mMutex);
                     cb->mCv.wait_for(_l, 1s, [&] { return !cb->mValues.empty(); });
                 }

                 EXPECT_EQ(cb->mValues.size(), 1UL)
                         << "callIsOneway: " << callIsOneway
                         << " callbackIsOneway: " << callbackIsOneway << " delayed: " << delayed;
                 if (cb->mValues.empty()) continue;
                 EXPECT_EQ(cb->mValues.at(0), kTestString)
                         << "callIsOneway: " << callIsOneway
                         << " callbackIsOneway: " << callbackIsOneway << " delayed: " << delayed;

                 proc.forceShutdown();
             }
         }
     }
 }

 TEST_P(BinderRpc, OnewayCallbackWithNoThread) {
     auto proc = createRpcTestSocketServerProcess({});
     auto cb = sp<MyBinderRpcCallback>::make();

     Status status = proc.rootIface->doCallback(cb, true /*oneway*/, false /*delayed*/, "anything");
     EXPECT_EQ(WOULD_BLOCK, status.transactionError());
 }

 TEST_P(BinderRpc, AidlDelegatorTest) {
     auto proc = createRpcTestSocketServerProcess({});
     auto myDelegator = sp<IBinderRpcTestDelegator>::make(proc.rootIface);
     ASSERT_NE(nullptr, myDelegator);

     std::string doubled;
     EXPECT_OK(myDelegator->doubleString("cool ", &doubled));
     EXPECT_EQ("cool cool ", doubled);
 }

 } // namespace android
	/*
	* Copyright (C) 2022 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 <chrono>
	#include <cstdlib>
	#include <type_traits>

	#include "binderRpcTestCommon.h"
	#include "binderRpcTestFixture.h"

	using namespace std::chrono_literals;
	using namespace std::placeholders;
	using testing::AssertionFailure;
	using testing::AssertionResult;
	using testing::AssertionSuccess;

	namespace android {

	static_assert(RPC_WIRE_PROTOCOL_VERSION + 1 == RPC_WIRE_PROTOCOL_VERSION_NEXT \|\|
	RPC_WIRE_PROTOCOL_VERSION == RPC_WIRE_PROTOCOL_VERSION_EXPERIMENTAL);

	TEST(BinderRpcParcel, EntireParcelFormatted) {
	Parcel p;
	p.writeInt32(3);

	EXPECT_DEATH_IF_SUPPORTED(p.markForBinder(sp<BBinder>::make()),
	"format must be set before data is written");
	}

	TEST(BinderRpc, CannotUseNextWireVersion) {
	auto session = RpcSession::make();
	EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT));
	EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT + 1));
	EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT + 2));
	EXPECT_FALSE(session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_NEXT + 15));
	}

	TEST(BinderRpc, CanUseExperimentalWireVersion) {
	auto session = RpcSession::make();
	EXPECT_EQ(hasExperimentalRpc(),
	session->setProtocolVersion(RPC_WIRE_PROTOCOL_VERSION_EXPERIMENTAL));
	}

	TEST_P(BinderRpc, Ping) {
	auto proc = createRpcTestSocketServerProcess({});
	ASSERT_NE(proc.rootBinder, nullptr);
	EXPECT_EQ(OK, proc.rootBinder->pingBinder());
	}

	TEST_P(BinderRpc, GetInterfaceDescriptor) {
	auto proc = createRpcTestSocketServerProcess({});
	ASSERT_NE(proc.rootBinder, nullptr);
	EXPECT_EQ(IBinderRpcTest::descriptor, proc.rootBinder->getInterfaceDescriptor());
	}

	TEST_P(BinderRpc, MultipleSessions) {
	if (serverSingleThreaded()) {
	// Tests with multiple sessions require a multi-threaded service,
	// but work fine on a single-threaded client
	GTEST_SKIP() << "This test requires a multi-threaded service";
	}

	auto proc = createRpcTestSocketServerProcess({.numThreads = 1, .numSessions = 5});
	for (auto session : proc.proc->sessions) {
	ASSERT_NE(nullptr, session.root);
	EXPECT_EQ(OK, session.root->pingBinder());
	}
	}

	TEST_P(BinderRpc, SeparateRootObject) {
	if (serverSingleThreaded()) {
	GTEST_SKIP() << "This test requires a multi-threaded service";
	}

	SocketType type = GetParam().type;
	if (type == SocketType::PRECONNECTED \|\| type == SocketType::UNIX \|\|
	type == SocketType::UNIX_BOOTSTRAP \|\| type == SocketType::UNIX_RAW) {
	// we can't get port numbers for unix sockets
	return;
	}

	auto proc = createRpcTestSocketServerProcess({.numSessions = 2});

	int port1 = 0;
	EXPECT_OK(proc.rootIface->getClientPort(&port1));

	sp<IBinderRpcTest> rootIface2 = interface_cast<IBinderRpcTest>(proc.proc->sessions.at(1).root);
	int port2;
	EXPECT_OK(rootIface2->getClientPort(&port2));

	// we should have a different IBinderRpcTest object created for each
	// session, because we use setPerSessionRootObject
	EXPECT_NE(port1, port2);
	}

	TEST_P(BinderRpc, TransactionsMustBeMarkedRpc) {
	auto proc = createRpcTestSocketServerProcess({});
	Parcel data;
	Parcel reply;
	EXPECT_EQ(BAD_TYPE, proc.rootBinder->transact(IBinder::PING_TRANSACTION, data, &reply, 0));
	}

	TEST_P(BinderRpc, AppendSeparateFormats) {
	if (socketType() == SocketType::TIPC) {
	GTEST_SKIP() << "Trusty does not support multiple server processes";
	}

	auto proc1 = createRpcTestSocketServerProcess({});
	auto proc2 = createRpcTestSocketServerProcess({});

	Parcel pRaw;

	Parcel p1;
	p1.markForBinder(proc1.rootBinder);
	p1.writeInt32(3);

	EXPECT_EQ(BAD_TYPE, p1.appendFrom(&pRaw, 0, pRaw.dataSize()));
	EXPECT_EQ(BAD_TYPE, pRaw.appendFrom(&p1, 0, p1.dataSize()));

	Parcel p2;
	p2.markForBinder(proc2.rootBinder);
	p2.writeInt32(7);

	EXPECT_EQ(BAD_TYPE, p1.appendFrom(&p2, 0, p2.dataSize()));
	EXPECT_EQ(BAD_TYPE, p2.appendFrom(&p1, 0, p1.dataSize()));
	}

	TEST_P(BinderRpc, UnknownTransaction) {
	auto proc = createRpcTestSocketServerProcess({});
	Parcel data;
	data.markForBinder(proc.rootBinder);
	Parcel reply;
	EXPECT_EQ(UNKNOWN_TRANSACTION, proc.rootBinder->transact(1337, data, &reply, 0));
	}

	TEST_P(BinderRpc, SendSomethingOneway) {
	auto proc = createRpcTestSocketServerProcess({});
	EXPECT_OK(proc.rootIface->sendString("asdf"));
	}

	TEST_P(BinderRpc, SendAndGetResultBack) {
	auto proc = createRpcTestSocketServerProcess({});
	std::string doubled;
	EXPECT_OK(proc.rootIface->doubleString("cool ", &doubled));
	EXPECT_EQ("cool cool ", doubled);
	}

	TEST_P(BinderRpc, SendAndGetResultBackBig) {
	auto proc = createRpcTestSocketServerProcess({});
	// Trusty has a limit of 4096 bytes for the entire RPC Binder message
	size_t singleLen = socketType() == SocketType::TIPC ? 512 : 4096;
	std::string single = std::string(singleLen, 'a');
	std::string doubled;
	EXPECT_OK(proc.rootIface->doubleString(single, &doubled));
	EXPECT_EQ(single + single, doubled);
	}

	TEST_P(BinderRpc, InvalidNullBinderReturn) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinder> outBinder;
	EXPECT_EQ(proc.rootIface->getNullBinder(&outBinder).transactionError(), UNEXPECTED_NULL);
	}

	TEST_P(BinderRpc, CallMeBack) {
	auto proc = createRpcTestSocketServerProcess({});

	int32_t pingResult;
	EXPECT_OK(proc.rootIface->pingMe(new MyBinderRpcSession("foo"), &pingResult));
	EXPECT_EQ(OK, pingResult);

	EXPECT_EQ(0, MyBinderRpcSession::gNum);
	}

	TEST_P(BinderRpc, RepeatBinder) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinder> inBinder = new MyBinderRpcSession("foo");
	sp<IBinder> outBinder;
	EXPECT_OK(proc.rootIface->repeatBinder(inBinder, &outBinder));
	EXPECT_EQ(inBinder, outBinder);

	wp<IBinder> weak = inBinder;
	inBinder = nullptr;
	outBinder = nullptr;

	// Force reading a reply, to process any pending dec refs from the other
	// process (the other process will process dec refs there before processing
	// the ping here).
	EXPECT_EQ(OK, proc.rootBinder->pingBinder());

	EXPECT_EQ(nullptr, weak.promote());

	EXPECT_EQ(0, MyBinderRpcSession::gNum);
	}

	TEST_P(BinderRpc, RepeatTheirBinder) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinderRpcSession> session;
	EXPECT_OK(proc.rootIface->openSession("aoeu", &session));

	sp<IBinder> inBinder = IInterface::asBinder(session);
	sp<IBinder> outBinder;
	EXPECT_OK(proc.rootIface->repeatBinder(inBinder, &outBinder));
	EXPECT_EQ(inBinder, outBinder);

	wp<IBinder> weak = inBinder;
	session = nullptr;
	inBinder = nullptr;
	outBinder = nullptr;

	// Force reading a reply, to process any pending dec refs from the other
	// process (the other process will process dec refs there before processing
	// the ping here).
	EXPECT_EQ(OK, proc.rootBinder->pingBinder());

	EXPECT_EQ(nullptr, weak.promote());
	}

	TEST_P(BinderRpc, RepeatBinderNull) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinder> outBinder;
	EXPECT_OK(proc.rootIface->repeatBinder(nullptr, &outBinder));
	EXPECT_EQ(nullptr, outBinder);
	}

	TEST_P(BinderRpc, HoldBinder) {
	auto proc = createRpcTestSocketServerProcess({});

	IBinder* ptr = nullptr;
	{
	sp<IBinder> binder = new BBinder();
	ptr = binder.get();
	EXPECT_OK(proc.rootIface->holdBinder(binder));
	}

	sp<IBinder> held;
	EXPECT_OK(proc.rootIface->getHeldBinder(&held));

	EXPECT_EQ(held.get(), ptr);

	// stop holding binder, because we test to make sure references are cleaned
	// up
	EXPECT_OK(proc.rootIface->holdBinder(nullptr));
	// and flush ref counts
	EXPECT_EQ(OK, proc.rootBinder->pingBinder());
	}

	// START TESTS FOR LIMITATIONS OF SOCKET BINDER
	// These are behavioral differences form regular binder, where certain usecases
	// aren't supported.

	TEST_P(BinderRpc, CannotMixBindersBetweenUnrelatedSocketSessions) {
	if (socketType() == SocketType::TIPC) {
	GTEST_SKIP() << "Trusty does not support multiple server processes";
	}

	auto proc1 = createRpcTestSocketServerProcess({});
	auto proc2 = createRpcTestSocketServerProcess({});

	sp<IBinder> outBinder;
	EXPECT_EQ(INVALID_OPERATION,
	proc1.rootIface->repeatBinder(proc2.rootBinder, &outBinder).transactionError());
	}

	TEST_P(BinderRpc, CannotMixBindersBetweenTwoSessionsToTheSameServer) {
	if (serverSingleThreaded()) {
	GTEST_SKIP() << "This test requires a multi-threaded service";
	}

	auto proc = createRpcTestSocketServerProcess({.numThreads = 1, .numSessions = 2});

	sp<IBinder> outBinder;
	EXPECT_EQ(INVALID_OPERATION,
	proc.rootIface->repeatBinder(proc.proc->sessions.at(1).root, &outBinder)
	.transactionError());
	}

	TEST_P(BinderRpc, CannotSendRegularBinderOverSocketBinder) {
	if (!kEnableKernelIpc \|\| noKernel()) {
	GTEST_SKIP() << "Test disabled because Binder kernel driver was disabled "
	"at build time.";
	}

	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinder> someRealBinder = IInterface::asBinder(defaultServiceManager());
	sp<IBinder> outBinder;
	EXPECT_EQ(INVALID_OPERATION,
	proc.rootIface->repeatBinder(someRealBinder, &outBinder).transactionError());
	}

	TEST_P(BinderRpc, CannotSendSocketBinderOverRegularBinder) {
	if (!kEnableKernelIpc \|\| noKernel()) {
	GTEST_SKIP() << "Test disabled because Binder kernel driver was disabled "
	"at build time.";
	}

	auto proc = createRpcTestSocketServerProcess({});

	// for historical reasons, IServiceManager interface only returns the
	// exception code
	EXPECT_EQ(binder::Status::EX_TRANSACTION_FAILED,
	defaultServiceManager()->addService(String16("not_suspicious"), proc.rootBinder));
	}

	// END TESTS FOR LIMITATIONS OF SOCKET BINDER

	TEST_P(BinderRpc, RepeatRootObject) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinder> outBinder;
	EXPECT_OK(proc.rootIface->repeatBinder(proc.rootBinder, &outBinder));
	EXPECT_EQ(proc.rootBinder, outBinder);
	}

	TEST_P(BinderRpc, NestedTransactions) {
	auto fileDescriptorTransportMode = RpcSession::FileDescriptorTransportMode::UNIX;
	if (socketType() == SocketType::TIPC) {
	// TIPC does not support file descriptors yet
	fileDescriptorTransportMode = RpcSession::FileDescriptorTransportMode::NONE;
	}
	auto proc = createRpcTestSocketServerProcess({
	// Enable FD support because it uses more stack space and so represents
	// something closer to a worst case scenario.
	.clientFileDescriptorTransportMode = fileDescriptorTransportMode,
	.serverSupportedFileDescriptorTransportModes = {fileDescriptorTransportMode},
	});

	auto nastyNester = sp<MyBinderRpcTestDefault>::make();
	EXPECT_OK(proc.rootIface->nestMe(nastyNester, 10));

	wp<IBinder> weak = nastyNester;
	nastyNester = nullptr;
	EXPECT_EQ(nullptr, weak.promote());
	}

	TEST_P(BinderRpc, SameBinderEquality) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinder> a;
	EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&a));

	sp<IBinder> b;
	EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&b));

	EXPECT_EQ(a, b);
	}

	TEST_P(BinderRpc, SameBinderEqualityWeak) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinder> a;
	EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&a));
	wp<IBinder> weak = a;
	a = nullptr;

	sp<IBinder> b;
	EXPECT_OK(proc.rootIface->alwaysGiveMeTheSameBinder(&b));

	// this is the wrong behavior, since BpBinder
	// doesn't implement onIncStrongAttempted
	// but make sure there is no crash
	EXPECT_EQ(nullptr, weak.promote());

	GTEST_SKIP() << "Weak binders aren't currently re-promotable for RPC binder.";

	// In order to fix this:
	// - need to have incStrongAttempted reflected across IPC boundary (wait for
	// response to promote - round trip...)
	// - sendOnLastWeakRef, to delete entries out of RpcState table
	EXPECT_EQ(b, weak.promote());
	}

	#define EXPECT_SESSIONS(expected, iface) \
	do { \
	int session; \
	EXPECT_OK((iface)->getNumOpenSessions(&session)); \
	EXPECT_EQ(static_cast<int>(expected), session); \
	} while (false)

	TEST_P(BinderRpc, SingleSession) {
	auto proc = createRpcTestSocketServerProcess({});

	sp<IBinderRpcSession> session;
	EXPECT_OK(proc.rootIface->openSession("aoeu", &session));
	std::string out;
	EXPECT_OK(session->getName(&out));
	EXPECT_EQ("aoeu", out);

	EXPECT_SESSIONS(1, proc.rootIface);
	session = nullptr;
	EXPECT_SESSIONS(0, proc.rootIface);
	}

	TEST_P(BinderRpc, ManySessions) {
	auto proc = createRpcTestSocketServerProcess({});

	std::vector<sp<IBinderRpcSession>> sessions;

	for (size_t i = 0; i < 15; i++) {
	EXPECT_SESSIONS(i, proc.rootIface);
	sp<IBinderRpcSession> session;
	EXPECT_OK(proc.rootIface->openSession(std::to_string(i), &session));
	sessions.push_back(session);
	}
	EXPECT_SESSIONS(sessions.size(), proc.rootIface);
	for (size_t i = 0; i < sessions.size(); i++) {
	std::string out;
	EXPECT_OK(sessions.at(i)->getName(&out));
	EXPECT_EQ(std::to_string(i), out);
	}
	EXPECT_SESSIONS(sessions.size(), proc.rootIface);

	while (!sessions.empty()) {
	sessions.pop_back();
	EXPECT_SESSIONS(sessions.size(), proc.rootIface);
	}
	EXPECT_SESSIONS(0, proc.rootIface);
	}

	TEST_P(BinderRpc, OnewayCallDoesNotWait) {
	constexpr size_t kReallyLongTimeMs = 100;
	constexpr size_t kSleepMs = kReallyLongTimeMs * 5;

	auto proc = createRpcTestSocketServerProcess({});

	size_t epochMsBefore = epochMillis();

	EXPECT_OK(proc.rootIface->sleepMsAsync(kSleepMs));

	size_t epochMsAfter = epochMillis();
	EXPECT_LT(epochMsAfter, epochMsBefore + kReallyLongTimeMs);
	}

	TEST_P(BinderRpc, Callbacks) {
	const static std::string kTestString = "good afternoon!";

	for (bool callIsOneway : {true, false}) {
	for (bool callbackIsOneway : {true, false}) {
	for (bool delayed : {true, false}) {
	if (clientOrServerSingleThreaded() &&
	(callIsOneway \|\| callbackIsOneway \|\| delayed)) {
	// we have no incoming connections to receive the callback
	continue;
	}

	size_t numIncomingConnections = clientOrServerSingleThreaded() ? 0 : 1;
	auto proc = createRpcTestSocketServerProcess(
	{.numThreads = 1,
	.numSessions = 1,
	.numIncomingConnectionsBySession = {numIncomingConnections}});
	auto cb = sp<MyBinderRpcCallback>::make();

	if (callIsOneway) {
	EXPECT_OK(proc.rootIface->doCallbackAsync(cb, callbackIsOneway, delayed,
	kTestString));
	} else {
	EXPECT_OK(
	proc.rootIface->doCallback(cb, callbackIsOneway, delayed, kTestString));
	}

	// if both transactions are synchronous and the response is sent back on the
	// same thread, everything should have happened in a nested call. Otherwise,
	// the callback will be processed on another thread.
	if (callIsOneway \|\| callbackIsOneway \|\| delayed) {
	using std::literals::chrono_literals::operator""s;
	RpcMutexUniqueLock _l(cb->mMutex);
	cb->mCv.wait_for(_l, 1s, [&] { return !cb->mValues.empty(); });
	}

	EXPECT_EQ(cb->mValues.size(), 1UL)
	<< "callIsOneway: " << callIsOneway
	<< " callbackIsOneway: " << callbackIsOneway << " delayed: " << delayed;
	if (cb->mValues.empty()) continue;
	EXPECT_EQ(cb->mValues.at(0), kTestString)
	<< "callIsOneway: " << callIsOneway
	<< " callbackIsOneway: " << callbackIsOneway << " delayed: " << delayed;

	proc.forceShutdown();
	}
	}
	}
	}

	TEST_P(BinderRpc, OnewayCallbackWithNoThread) {
	auto proc = createRpcTestSocketServerProcess({});
	auto cb = sp<MyBinderRpcCallback>::make();

	Status status = proc.rootIface->doCallback(cb, true /oneway/, false /delayed/, "anything");
	EXPECT_EQ(WOULD_BLOCK, status.transactionError());
	}

	TEST_P(BinderRpc, AidlDelegatorTest) {
	auto proc = createRpcTestSocketServerProcess({});
	auto myDelegator = sp<IBinderRpcTestDelegator>::make(proc.rootIface);
	ASSERT_NE(nullptr, myDelegator);

	std::string doubled;
	EXPECT_OK(myDelegator->doubleString("cool ", &doubled));
	EXPECT_EQ("cool cool ", doubled);
	}

	} // namespace android