ddltest: refactor logutil.InitLogger in ddltest to avoid data race

cmd/ddltest/ddl_serial_test.go

@@ -33,7 +33,6 @@ import (
 	_ "github.com/go-sql-driver/mysql"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/log"
-	zaplog "github.com/pingcap/log"
 	"github.com/pingcap/tidb/ddl"
 	"github.com/pingcap/tidb/domain"
 	"github.com/pingcap/tidb/kv"
@@ -48,7 +47,6 @@ import (
 	"github.com/pingcap/tidb/table/tables"
 	"github.com/pingcap/tidb/testkit"
 	"github.com/pingcap/tidb/types"
-	"github.com/pingcap/tidb/util/logutil"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 	goctx "golang.org/x/net/context"
@@ -91,11 +89,9 @@ type ddlSuite struct {
 }
 
 func createDDLSuite(t *testing.T) (s *ddlSuite) {
+	var err error
 	s = new(ddlSuite)
 
-	err := logutil.InitLogger(&logutil.LogConfig{Config: zaplog.Config{Level: *logLevel}})
-	require.NoError(t, err)
-
 	s.quit = make(chan struct{})
 
 	s.store, err = store.New(fmt.Sprintf("tikv://%s%s", *etcd, *tikvPath))

cmd/ddltest/main_test.go

@@ -0,0 +1,36 @@
+// Copyright 2021 PingCAP, Inc.
+//
+// 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.
+
+package ddltest
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	zaplog "github.com/pingcap/log"
+	"github.com/pingcap/tidb/util/logutil"
+	"github.com/pingcap/tidb/util/testbridge"
+	"go.uber.org/goleak"
+)
+
+func TestMain(m *testing.M) {
+	testbridge.WorkaroundGoCheckFlags()
+	err := logutil.InitLogger(&logutil.LogConfig{Config: zaplog.Config{Level: *logLevel}})
+	if err != nil {
+		fmt.Fprint(os.Stderr, err.Error())
+		os.Exit(1)
+	}
+	goleak.VerifyTestMain(m)
+}