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/*
* Copyright (C) 2018 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 "src/ipc/client_impl.h"
#include <stdio.h>
#include <unistd.h>
#include <string>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "perfetto/base/file_utils.h"
#include "perfetto/base/temp_file.h"
#include "perfetto/base/unix_socket.h"
#include "perfetto/base/utils.h"
#include "perfetto/ipc/service_descriptor.h"
#include "perfetto/ipc/service_proxy.h"
#include "src/base/test/test_task_runner.h"
#include "src/ipc/buffered_frame_deserializer.h"
#include "src/ipc/test/test_socket.h"
#include "src/ipc/test/client_unittest_messages.pb.h"
namespace perfetto {
namespace ipc {
namespace {
using ::testing::_;
using ::testing::InSequence;
using ::testing::Invoke;
using ::testing::Mock;
constexpr char kSockName[] = TEST_SOCK_NAME("client_impl_unittest");
// A fake ServiceProxy. This fakes the client-side class that would be
// auto-generated from .proto-files.
class FakeProxy : public ServiceProxy {
public:
FakeProxy(const char* service_name, ServiceProxy::EventListener* el)
: ServiceProxy(el), service_name_(service_name) {}
const ServiceDescriptor& GetDescriptor() override {
auto reply_decoder = [](const std::string& proto) {
std::unique_ptr<ProtoMessage> reply(new ReplyProto());
EXPECT_TRUE(reply->ParseFromString(proto));
return reply;
};
if (!descriptor_.service_name) {
descriptor_.service_name = service_name_;
descriptor_.methods.push_back(
{"FakeMethod1", nullptr, reply_decoder, nullptr});
}
return descriptor_;
}
const char* service_name_;
ServiceDescriptor descriptor_;
};
class MockEventListener : public ServiceProxy::EventListener {
public:
MOCK_METHOD0(OnConnect, void());
MOCK_METHOD0(OnDisconnect, void());
};
// A fake host implementation. Listens on |kSockName| and replies to IPC
// metohds like a real one.
class FakeHost : public base::UnixSocket::EventListener {
public:
struct FakeMethod {
MethodID id;
MOCK_METHOD2(OnInvoke,
void(const Frame::InvokeMethod&, Frame::InvokeMethodReply*));
}; // FakeMethod.
struct FakeService {
FakeMethod* AddFakeMethod(const std::string& name) {
auto it_and_inserted =
methods.emplace(name, std::unique_ptr<FakeMethod>(new FakeMethod()));
EXPECT_TRUE(it_and_inserted.second);
FakeMethod* method = it_and_inserted.first->second.get();
method->id = ++last_method_id;
return method;
}
ServiceID id;
std::map<std::string, std::unique_ptr<FakeMethod>> methods;
MethodID last_method_id = 0;
}; // FakeService.
explicit FakeHost(base::TaskRunner* task_runner) {
DESTROY_TEST_SOCK(kSockName);
listening_sock = base::UnixSocket::Listen(kSockName, this, task_runner);
EXPECT_TRUE(listening_sock->is_listening());
}
~FakeHost() override { DESTROY_TEST_SOCK(kSockName); }
FakeService* AddFakeService(const std::string& name) {
auto it_and_inserted =
services.emplace(name, std::unique_ptr<FakeService>(new FakeService()));
EXPECT_TRUE(it_and_inserted.second);
FakeService* svc = it_and_inserted.first->second.get();
svc->id = ++last_service_id;
return svc;
}
// base::UnixSocket::EventListener implementation.
void OnNewIncomingConnection(
base::UnixSocket*,
std::unique_ptr<base::UnixSocket> new_connection) override {
ASSERT_FALSE(client_sock);
client_sock = std::move(new_connection);
}
void OnDataAvailable(base::UnixSocket* sock) override {
if (sock != client_sock.get())
return;
auto buf = frame_deserializer.BeginReceive();
base::ScopedFile fd;
size_t rsize = client_sock->Receive(buf.data, buf.size, &fd);
if (fd)
received_fd_ = std::move(fd);
EXPECT_TRUE(frame_deserializer.EndReceive(rsize));
while (std::unique_ptr<Frame> frame = frame_deserializer.PopNextFrame())
OnFrameReceived(*frame);
}
void OnFrameReceived(const Frame& req) {
if (req.msg_case() == Frame::kMsgBindService) {
auto svc_it = services.find(req.msg_bind_service().service_name());
ASSERT_NE(services.end(), svc_it);
const FakeService& svc = *svc_it->second;
Frame reply;
reply.set_request_id(req.request_id());
reply.mutable_msg_bind_service_reply()->set_success(true);
reply.mutable_msg_bind_service_reply()->set_service_id(svc.id);
for (const auto& method_it : svc.methods) {
auto* method = reply.mutable_msg_bind_service_reply()->add_methods();
method->set_name(method_it.first);
method->set_id(method_it.second->id);
}
Reply(reply);
} else if (req.msg_case() == Frame::kMsgInvokeMethod) {
// Lookup the service and method.
bool has_more = false;
do {
Frame reply;
reply.set_request_id(req.request_id());
for (const auto& svc : services) {
if (svc.second->id != req.msg_invoke_method().service_id())
continue;
for (const auto& method : svc.second->methods) {
if (method.second->id != req.msg_invoke_method().method_id())
continue;
method.second->OnInvoke(req.msg_invoke_method(),
reply.mutable_msg_invoke_method_reply());
has_more = reply.mutable_msg_invoke_method_reply()->has_more();
}
}
// If either the method or the service are not found, |success| will be
// false by default.
Reply(reply);
} while (has_more);
} else {
FAIL() << "Unknown request";
}
}
void Reply(const Frame& frame) {
auto buf = BufferedFrameDeserializer::Serialize(frame);
ASSERT_TRUE(client_sock->is_connected());
EXPECT_TRUE(client_sock->Send(buf.data(), buf.size(), next_reply_fd,
base::UnixSocket::BlockingMode::kBlocking));
next_reply_fd = -1;
}
BufferedFrameDeserializer frame_deserializer;
std::unique_ptr<base::UnixSocket> listening_sock;
std::unique_ptr<base::UnixSocket> client_sock;
std::map<std::string, std::unique_ptr<FakeService>> services;
ServiceID last_service_id = 0;
int next_reply_fd = -1;
base::ScopedFile received_fd_;
}; // FakeHost.
class ClientImplTest : public ::testing::Test {
public:
void SetUp() override {
task_runner_.reset(new base::TestTaskRunner());
host_.reset(new FakeHost(task_runner_.get()));
cli_ = Client::CreateInstance(kSockName, task_runner_.get());
}
void TearDown() override {
cli_.reset();
host_.reset();
task_runner_->RunUntilIdle();
task_runner_.reset();
}
::testing::StrictMock<MockEventListener> proxy_events_;
std::unique_ptr<base::TestTaskRunner> task_runner_;
std::unique_ptr<FakeHost> host_;
std::unique_ptr<Client> cli_;
};
TEST_F(ClientImplTest, BindAndInvokeMethod) {
auto* host_svc = host_->AddFakeService("FakeSvc");
auto* host_method = host_svc->AddFakeMethod("FakeMethod1");
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
// Bind |proxy| to the fake host.
cli_->BindService(proxy->GetWeakPtr());
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
task_runner_->RunUntilCheckpoint("on_connect");
// Invoke a valid method.
EXPECT_CALL(*host_method, OnInvoke(_, _))
.WillOnce(Invoke(
[](const Frame::InvokeMethod& req, Frame::InvokeMethodReply* reply) {
RequestProto req_args;
EXPECT_TRUE(req_args.ParseFromString(req.args_proto()));
EXPECT_EQ("req_data", req_args.data());
ReplyProto reply_args;
reply->set_reply_proto(reply_args.SerializeAsString());
reply->set_success(true);
}));
RequestProto req;
req.set_data("req_data");
auto on_invoke_reply = task_runner_->CreateCheckpoint("on_invoke_reply");
Deferred<ProtoMessage> deferred_reply(
[on_invoke_reply](AsyncResult<ProtoMessage> reply) {
EXPECT_TRUE(reply.success());
on_invoke_reply();
});
proxy->BeginInvoke("FakeMethod1", req, std::move(deferred_reply));
task_runner_->RunUntilCheckpoint("on_invoke_reply");
// Invoke an invalid method.
auto on_invalid_invoke = task_runner_->CreateCheckpoint("on_invalid_invoke");
Deferred<ProtoMessage> deferred_reply2(
[on_invalid_invoke](AsyncResult<ProtoMessage> reply) {
EXPECT_FALSE(reply.success());
on_invalid_invoke();
});
RequestProto empty_req;
proxy->BeginInvoke("InvalidMethod", empty_req, std::move(deferred_reply2));
task_runner_->RunUntilCheckpoint("on_invalid_invoke");
}
// Tests that when invoking a method without binding a callback, the resulting
// request has the |drop_reply| flag set.
TEST_F(ClientImplTest, InvokeMethodDropReply) {
auto* host_svc = host_->AddFakeService("FakeSvc");
auto* host_method = host_svc->AddFakeMethod("FakeMethod1");
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
// Bind |proxy| to the fake host.
cli_->BindService(proxy->GetWeakPtr());
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
task_runner_->RunUntilCheckpoint("on_connect");
auto on_req_received = task_runner_->CreateCheckpoint("on_req_received");
EXPECT_CALL(*host_method, OnInvoke(_, _))
.WillOnce(Invoke([on_req_received](const Frame::InvokeMethod& req,
Frame::InvokeMethodReply*) {
RequestProto req_args;
EXPECT_TRUE(req.drop_reply());
on_req_received();
}));
// Invoke a method without binding any callback to the Deferred object.
Deferred<ProtoMessage> no_callback;
proxy->BeginInvoke("FakeMethod1", RequestProto(), std::move(no_callback));
task_runner_->RunUntilCheckpoint("on_req_received");
}
// Like BindAndInvokeMethod, but this time invoke a streaming method that
// provides > 1 reply per invocation.
TEST_F(ClientImplTest, BindAndInvokeStreamingMethod) {
auto* host_svc = host_->AddFakeService("FakeSvc");
auto* host_method = host_svc->AddFakeMethod("FakeMethod1");
const int kNumReplies = 3;
// Create and bind |proxy| to the fake host.
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
cli_->BindService(proxy->GetWeakPtr());
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
task_runner_->RunUntilCheckpoint("on_connect");
// Invoke a valid method, reply kNumReplies times.
int replies_left = kNumReplies;
EXPECT_CALL(*host_method, OnInvoke(_, _))
.Times(kNumReplies)
.WillRepeatedly(Invoke([&replies_left](const Frame::InvokeMethod& req,
Frame::InvokeMethodReply* reply) {
RequestProto req_args;
EXPECT_TRUE(req_args.ParseFromString(req.args_proto()));
reply->set_reply_proto(ReplyProto().SerializeAsString());
reply->set_success(true);
reply->set_has_more(--replies_left > 0);
}));
RequestProto req;
req.set_data("req_data");
auto on_last_reply = task_runner_->CreateCheckpoint("on_last_reply");
int replies_seen = 0;
Deferred<ProtoMessage> deferred_reply(
[on_last_reply, &replies_seen](AsyncResult<ProtoMessage> reply) {
EXPECT_TRUE(reply.success());
replies_seen++;
if (!reply.has_more())
on_last_reply();
});
proxy->BeginInvoke("FakeMethod1", req, std::move(deferred_reply));
task_runner_->RunUntilCheckpoint("on_last_reply");
ASSERT_EQ(kNumReplies, replies_seen);
}
TEST_F(ClientImplTest, ReceiveFileDescriptor) {
auto* host_svc = host_->AddFakeService("FakeSvc");
auto* host_method = host_svc->AddFakeMethod("FakeMethod1");
// Create and bind |proxy| to the fake host.
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
cli_->BindService(proxy->GetWeakPtr());
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
task_runner_->RunUntilCheckpoint("on_connect");
base::TempFile tx_file = base::TempFile::CreateUnlinked();
static constexpr char kFileContent[] = "shared file";
ASSERT_EQ(static_cast<size_t>(base::WriteAll(tx_file.fd(), kFileContent,
sizeof(kFileContent))),
sizeof(kFileContent));
host_->next_reply_fd = tx_file.fd();
EXPECT_CALL(*host_method, OnInvoke(_, _))
.WillOnce(Invoke(
[](const Frame::InvokeMethod&, Frame::InvokeMethodReply* reply) {
RequestProto req_args;
reply->set_reply_proto(ReplyProto().SerializeAsString());
reply->set_success(true);
}));
RequestProto req;
auto on_reply = task_runner_->CreateCheckpoint("on_reply");
Deferred<ProtoMessage> deferred_reply(
[on_reply](AsyncResult<ProtoMessage> reply) {
EXPECT_TRUE(reply.success());
on_reply();
});
proxy->BeginInvoke("FakeMethod1", req, std::move(deferred_reply));
task_runner_->RunUntilCheckpoint("on_reply");
tx_file.ReleaseFD();
base::ScopedFile rx_fd = cli_->TakeReceivedFD();
ASSERT_TRUE(rx_fd);
char buf[sizeof(kFileContent)] = {};
ASSERT_EQ(0, lseek(*rx_fd, 0, SEEK_SET));
ASSERT_EQ(static_cast<long>(sizeof(buf)),
PERFETTO_EINTR(read(*rx_fd, buf, sizeof(buf))));
ASSERT_STREQ(kFileContent, buf);
}
TEST_F(ClientImplTest, SendFileDescriptor) {
auto* host_svc = host_->AddFakeService("FakeSvc");
auto* host_method = host_svc->AddFakeMethod("FakeMethod1");
// Create and bind |proxy| to the fake host.
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
cli_->BindService(proxy->GetWeakPtr());
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
task_runner_->RunUntilCheckpoint("on_connect");
base::TempFile tx_file = base::TempFile::CreateUnlinked();
static constexpr char kFileContent[] = "shared file";
ASSERT_EQ(static_cast<size_t>(base::WriteAll(tx_file.fd(), kFileContent,
sizeof(kFileContent))),
sizeof(kFileContent));
EXPECT_CALL(*host_method, OnInvoke(_, _))
.WillOnce(Invoke(
[](const Frame::InvokeMethod&, Frame::InvokeMethodReply* reply) {
RequestProto req_args;
reply->set_reply_proto(ReplyProto().SerializeAsString());
reply->set_success(true);
}));
RequestProto req;
auto on_reply = task_runner_->CreateCheckpoint("on_reply");
Deferred<ProtoMessage> deferred_reply(
[on_reply](AsyncResult<ProtoMessage> reply) {
EXPECT_TRUE(reply.success());
on_reply();
});
proxy->BeginInvoke("FakeMethod1", req, std::move(deferred_reply),
tx_file.fd());
task_runner_->RunUntilCheckpoint("on_reply");
base::ScopedFile rx_fd = std::move(host_->received_fd_);
ASSERT_TRUE(rx_fd);
char buf[sizeof(kFileContent)] = {};
ASSERT_EQ(0, lseek(*rx_fd, 0, SEEK_SET));
ASSERT_EQ(static_cast<long>(sizeof(buf)),
PERFETTO_EINTR(read(*rx_fd, buf, sizeof(buf))));
ASSERT_STREQ(kFileContent, buf);
}
TEST_F(ClientImplTest, BindSameServiceMultipleTimesShouldFail) {
host_->AddFakeService("FakeSvc");
std::unique_ptr<FakeProxy> proxy[3];
for (size_t i = 0; i < base::ArraySize(proxy); i++)
proxy[i].reset(new FakeProxy("FakeSvc", &proxy_events_));
// Bind to the host.
for (size_t i = 0; i < base::ArraySize(proxy); i++) {
auto checkpoint_name = "on_connect_or_disconnect" + std::to_string(i);
auto closure = task_runner_->CreateCheckpoint(checkpoint_name);
if (i == 0) {
// Only the first call should succeed.
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(closure));
} else {
EXPECT_CALL(proxy_events_, OnDisconnect()).WillOnce(Invoke(closure));
}
cli_->BindService(proxy[i]->GetWeakPtr());
task_runner_->RunUntilCheckpoint(checkpoint_name);
}
}
TEST_F(ClientImplTest, BindRequestsAreQueuedIfNotConnected) {
host_->AddFakeService("FakeSvc1");
host_->AddFakeService("FakeSvc2");
std::unique_ptr<FakeProxy> proxy1(new FakeProxy("FakeSvc1", &proxy_events_));
std::unique_ptr<FakeProxy> proxy2(new FakeProxy("FakeSvc2", &proxy_events_));
// Bind the services (in opposite order of creation) before running any task.
cli_->BindService(proxy2->GetWeakPtr());
cli_->BindService(proxy1->GetWeakPtr());
InSequence seq;
auto on_connect1 = task_runner_->CreateCheckpoint("on_connect1");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect1));
auto on_connect2 = task_runner_->CreateCheckpoint("on_connect2");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect2));
task_runner_->RunUntilCheckpoint("on_connect1");
task_runner_->RunUntilCheckpoint("on_connect2");
}
// The deferred callbacks for both binding a service and invoking a method
// should be dropped if the ServiceProxy object is destroyed prematurely.
TEST_F(ClientImplTest, DropCallbacksIfServiceProxyIsDestroyed) {
auto* host_svc = host_->AddFakeService("FakeSvc");
auto* host_method = host_svc->AddFakeMethod("FakeMethod1");
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
// First bind the service but destroy it before ClientImpl manages to run any
// tasks. No OnConnect() should be called.
cli_->BindService(proxy->GetWeakPtr());
proxy.reset();
task_runner_->RunUntilIdle();
ASSERT_TRUE(Mock::VerifyAndClearExpectations(&proxy_events_));
// Now bind it successfully, invoke a method but destroy the proxy before
// the method reply is dispatched. The DeferredReply should be rejected,
// despite the fact that the host gave a successful reply.
proxy.reset(new FakeProxy("FakeSvc", &proxy_events_));
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
cli_->BindService(proxy->GetWeakPtr());
task_runner_->RunUntilCheckpoint("on_connect");
RequestProto req;
auto on_reply_sent = task_runner_->CreateCheckpoint("on_reply_sent");
EXPECT_CALL(*host_method, OnInvoke(_, _))
.WillOnce(Invoke([on_reply_sent](const Frame::InvokeMethod&,
Frame::InvokeMethodReply* reply) {
ReplyProto reply_args;
reply->set_success(true);
on_reply_sent();
}));
auto on_reject = task_runner_->CreateCheckpoint("on_reject");
Deferred<ProtoMessage> deferred_reply(
[on_reject](AsyncResult<ProtoMessage> res) {
ASSERT_FALSE(res.success());
on_reject();
});
proxy->BeginInvoke("FakeMethod1", req, std::move(deferred_reply));
proxy.reset();
task_runner_->RunUntilCheckpoint("on_reject");
task_runner_->RunUntilCheckpoint("on_reply_sent");
}
// If the Client object is destroyed before the ServiceProxy, the ServiceProxy
// should see a Disconnect() call and any pending callback should be rejected.
TEST_F(ClientImplTest, ClientDestroyedBeforeProxy) {
auto* host_svc = host_->AddFakeService("FakeSvc");
host_svc->AddFakeMethod("FakeMethod1");
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
cli_->BindService(proxy->GetWeakPtr());
task_runner_->RunUntilCheckpoint("on_connect");
auto on_reject = task_runner_->CreateCheckpoint("on_reject");
DeferredBase deferred_reply([on_reject](AsyncResult<ProtoMessage> res) {
ASSERT_FALSE(res.success());
on_reject();
});
RequestProto req;
proxy->BeginInvoke("FakeMethod1", req, std::move(deferred_reply));
EXPECT_CALL(proxy_events_, OnDisconnect());
cli_.reset();
host_.reset(); // Prevent spurious OnInvoke callbacks on the fake host.
task_runner_->RunUntilCheckpoint("on_reject");
}
// Test that OnDisconnect() is invoked if the host is not reachable.
TEST_F(ClientImplTest, HostNotReachable) {
host_.reset();
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
auto on_disconnect = task_runner_->CreateCheckpoint("on_disconnect");
EXPECT_CALL(proxy_events_, OnDisconnect()).WillOnce(Invoke(on_disconnect));
cli_->BindService(proxy->GetWeakPtr());
task_runner_->RunUntilCheckpoint("on_disconnect");
}
// Test that OnDisconnect() is invoked if the host shuts down prematurely.
TEST_F(ClientImplTest, HostDisconnection) {
host_->AddFakeService("FakeSvc");
std::unique_ptr<FakeProxy> proxy(new FakeProxy("FakeSvc", &proxy_events_));
// Bind |proxy| to the fake host.
cli_->BindService(proxy->GetWeakPtr());
auto on_connect = task_runner_->CreateCheckpoint("on_connect");
EXPECT_CALL(proxy_events_, OnConnect()).WillOnce(Invoke(on_connect));
task_runner_->RunUntilCheckpoint("on_connect");
auto on_disconnect = task_runner_->CreateCheckpoint("on_disconnect");
EXPECT_CALL(proxy_events_, OnDisconnect()).WillOnce(Invoke(on_disconnect));
host_.reset();
task_runner_->RunUntilCheckpoint("on_disconnect");
}
// TODO(primiano): add the tests below.
// TEST(ClientImplTest, UnparsableReply) {}
} // namespace
} // namespace ipc
} // namespace perfetto