DATA RACE at the EnableCollectExecutionInfo

[hawkingrei]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

==================
WARNING: DATA RACE
Write at 0x00c004e5c1d0 by goroutine 564671:
  github.com/pingcap/tidb/infoschema_test.TestVariablesInfo()
      infoschema/tables_test.go:1536 +0x55b
  testing.tRunner()
      GOROOT/src/testing/testing.go:1446 +0x216
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1493 +0x47
Previous read at 0x00c004e5c1d0 by goroutine 575126:
  github.com/pingcap/tidb/executor.ResetContextOfStmt()
      executor/executor.go:2112 +0x3038
  github.com/pingcap/tidb/session.(*session).ExecuteStmt()
      session/session.go:2064 +0x391
  github.com/pingcap/tidb/session.(*session).ExecRestrictedSQL.func1()
      session/session.go:2024 +0x2b7
  github.com/pingcap/tidb/session.(*session).withRestrictedSQLExecutor()
      session/session.go:2010 +0x391
  github.com/pingcap/tidb/session.(*session).ExecRestrictedSQL()
      session/session.go:2014 +0x124
  github.com/pingcap/tidb/domain.(*Domain).refreshMDLCheckTableInfo()
      domain/domain.go:632 +0x421
  github.com/pingcap/tidb/domain.(*Domain).loadSchemaInLoop()
      domain/domain.go:782 +0x17b
  github.com/pingcap/tidb/domain.(*Domain).Init.func9()
      domain/domain.go:1028 +0x64
Goroutine 564671 (running) created at:
  testing.(*T).Run()
      GOROOT/src/testing/testing.go:1493 +0x75d
  testing.runTests.func1()
      GOROOT/src/testing/testing.go:1846 +0x99
  testing.tRunner()
      GOROOT/src/testing/testing.go:1446 +0x216
  testing.runTests()
      GOROOT/src/testing/testing.go:1844 +0x7ec
  testing.(*M).Run()
      GOROOT/src/testing/testing.go:1726 +0xa84
  go.uber.org/goleak.VerifyTestMain()
      external/org_uber_go_goleak/testmain.go:53 +0x70
  github.com/pingcap/tidb/infoschema.TestMain()
      infoschema/main_test.go:31 +0x31b
  main.main()
      bazel-out/k8-fastbuild/bin/infoschema/infoschema_test_/testmain.go:214 +0x5e8
Goroutine 575126 (running) created at:
  github.com/pingcap/tidb/domain.(*Domain).Init()
      domain/domain.go:1028 +0x146d
  github.com/pingcap/tidb/session.(*domainMap).Get.func1()
      session/tidb.go:93 +0x6c4
  github.com/pingcap/tidb/util.RunWithRetry()
      util/misc.go:69 +0x93
  github.com/pingcap/tidb/session.(*domainMap).Get()
      session/tidb.go:76 +0x258
  github.com/pingcap/tidb/session.createSessionWithOpt()
      session/session.go:2963 +0x75
  github.com/pingcap/tidb/session.createSession()
      session/session.go:2959 +0x84
  github.com/pingcap/tidb/session.createSessions()
      session/session.go:2948 +0x6e
  github.com/pingcap/tidb/session.BootstrapSession()
      session/session.go:2824 +0x337
  github.com/pingcap/tidb/testkit.bootstrap()
      testkit/mockstore.go:76 +0x8c
  github.com/pingcap/tidb/testkit.CreateMockStoreAndDomain()
      testkit/mockstore.go:67 +0xe9
  github.com/pingcap/tidb/testkit.CreateMockStore()
      testkit/mockstore.go:59 +0x373
  github.com/pingcap/tidb/infoschema_test.TestVariablesInfo()
      infoschema/tables_test.go:1508 +0x58
  testing.tRunner()
      GOROOT/src/testing/testing.go:1446 +0x216
  testing.(*T).Run.func1()
      GOROOT/src/testing/testing.go:1493 +0x47
================== 

2. What did you expect to see? (Required)

3. What did you see instead (Required)

4. What is your TiDB version? (Required)

[CbcWestwolf]

/assign