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172 lines
5.2 KiB
172 lines
5.2 KiB
// Copyright 2022 The gRPC Authors |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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#include <grpc/support/port_platform.h> |
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#ifndef GRPC_ENABLE_FORK_SUPPORT |
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// No-op for builds without fork support. |
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int main(int /* argc */, char** /* argv */) { return 0; } |
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#else // GRPC_ENABLE_FORK_SUPPORT |
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#include <signal.h> |
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#include <gtest/gtest.h> |
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#include "absl/log/log.h" |
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#include "absl/strings/str_cat.h" |
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#include <grpc/fork.h> |
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#include <grpc/grpc.h> |
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#include <grpc/support/time.h> |
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#include <grpcpp/channel.h> |
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#include <grpcpp/client_context.h> |
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#include <grpcpp/create_channel.h> |
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#include <grpcpp/server.h> |
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#include <grpcpp/server_builder.h> |
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#include <grpcpp/server_context.h> |
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#include "src/core/util/fork.h" |
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#include "src/proto/grpc/testing/echo.grpc.pb.h" |
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#include "test/core/test_util/port.h" |
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#include "test/core/test_util/test_config.h" |
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#include "test/cpp/util/test_config.h" |
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namespace grpc { |
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namespace testing { |
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namespace { |
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class ServiceImpl final : public EchoTestService::Service { |
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Status BidiStream( |
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ServerContext* /*context*/, |
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ServerReaderWriter<EchoResponse, EchoRequest>* stream) override { |
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EchoRequest request; |
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EchoResponse response; |
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while (stream->Read(&request)) { |
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LOG(INFO) << "recv msg " << request.message(); |
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response.set_message(request.message()); |
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stream->Write(response); |
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LOG(INFO) << "wrote msg " << response.message(); |
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} |
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return Status::OK; |
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} |
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}; |
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std::unique_ptr<EchoTestService::Stub> MakeStub(const std::string& addr) { |
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return EchoTestService::NewStub( |
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grpc::CreateChannel(addr, InsecureChannelCredentials())); |
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} |
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TEST(ClientForkTest, ClientCallsBeforeAndAfterForkSucceed) { |
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grpc_core::Fork::Enable(true); |
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int port = grpc_pick_unused_port_or_die(); |
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std::string addr = absl::StrCat("localhost:", port); |
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pid_t server_pid = fork(); |
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switch (server_pid) { |
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case -1: // fork failed |
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GTEST_FAIL() << "failure forking"; |
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case 0: // post-fork child |
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{ |
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ServiceImpl impl; |
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grpc::ServerBuilder builder; |
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builder.AddListeningPort(addr, grpc::InsecureServerCredentials()); |
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builder.RegisterService(&impl); |
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std::unique_ptr<Server> server(builder.BuildAndStart()); |
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server->Wait(); |
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return; |
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} |
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default: // post-fork parent |
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break; |
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} |
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// Do a round trip before we fork. |
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// NOTE: without this scope, test running with the epoll1 poller will fail. |
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{ |
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std::unique_ptr<EchoTestService::Stub> stub = MakeStub(addr); |
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EchoRequest request; |
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EchoResponse response; |
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ClientContext context; |
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context.set_wait_for_ready(true); |
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auto stream = stub->BidiStream(&context); |
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request.set_message("Hello"); |
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ASSERT_TRUE(stream->Write(request)); |
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ASSERT_TRUE(stream->Read(&response)); |
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ASSERT_EQ(response.message(), request.message()); |
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} |
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// Fork and do round trips in the post-fork parent and child. |
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pid_t child_client_pid = fork(); |
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switch (child_client_pid) { |
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case -1: // fork failed |
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GTEST_FAIL() << "fork failed"; |
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case 0: // post-fork child |
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{ |
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VLOG(2) << "In post-fork child"; |
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EchoRequest request; |
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EchoResponse response; |
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ClientContext context; |
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context.set_wait_for_ready(true); |
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std::unique_ptr<EchoTestService::Stub> stub = MakeStub(addr); |
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auto stream = stub->BidiStream(&context); |
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request.set_message("Hello again from child"); |
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ASSERT_TRUE(stream->Write(request)); |
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ASSERT_TRUE(stream->Read(&response)); |
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ASSERT_EQ(response.message(), request.message()); |
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exit(0); |
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} |
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default: // post-fork parent |
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{ |
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VLOG(2) << "In post-fork parent"; |
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EchoRequest request; |
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EchoResponse response; |
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ClientContext context; |
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context.set_wait_for_ready(true); |
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std::unique_ptr<EchoTestService::Stub> stub = MakeStub(addr); |
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auto stream = stub->BidiStream(&context); |
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request.set_message("Hello again from parent"); |
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EXPECT_TRUE(stream->Write(request)); |
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EXPECT_TRUE(stream->Read(&response)); |
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EXPECT_EQ(response.message(), request.message()); |
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// Wait for the post-fork child to exit; ensure it exited cleanly. |
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int child_status; |
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ASSERT_EQ(waitpid(child_client_pid, &child_status, 0), child_client_pid) |
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<< "failed to get status of child client"; |
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ASSERT_EQ(WEXITSTATUS(child_status), 0) << "child did not exit cleanly"; |
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} |
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} |
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kill(server_pid, SIGINT); |
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} |
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} // namespace |
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} // namespace testing |
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} // namespace grpc |
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int main(int argc, char** argv) { |
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testing::InitGoogleTest(&argc, argv); |
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grpc::testing::InitTest(&argc, &argv, true); |
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grpc::testing::TestEnvironment env(&argc, argv); |
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grpc_init(); |
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int res = RUN_ALL_TESTS(); |
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grpc_shutdown(); |
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return res; |
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} |
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#endif // GRPC_ENABLE_FORK_SUPPORT
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