bindInfo: fix datarace on bindings (#40846)

close pingcap/tidb#40843

bindinfo/bind_record.go

@@ -115,6 +115,17 @@ type BindRecord struct {
 	Bindings []Binding
 }
 
+// Copy get the copy of bindRecord
+func (br *BindRecord) Copy() *BindRecord {
+	nbr := &BindRecord{
+		OriginalSQL: br.OriginalSQL,
+		Db:          br.Db,
+	}
+	nbr.Bindings = make([]Binding, len(br.Bindings))
+	copy(nbr.Bindings, br.Bindings)
+	return nbr
+}
+
 // HasEnabledBinding checks if there are any enabled bindings in bind record.
 func (br *BindRecord) HasEnabledBinding() bool {
 	for _, binding := range br.Bindings {

executor/BUILD.bazel

@@ -192,7 +192,6 @@ go_library(
         "//util/servermemorylimit",
         "//util/set",
         "//util/size",
-        "//util/slice",
         "//util/sqlexec",
         "//util/stmtsummary",
         "//util/stringutil",

executor/show.go

@@ -69,7 +69,6 @@ import (
 	"github.com/pingcap/tidb/util/memory"
 	"github.com/pingcap/tidb/util/sem"
 	"github.com/pingcap/tidb/util/set"
-	"github.com/pingcap/tidb/util/slice"
 	"github.com/pingcap/tidb/util/sqlexec"
 	"github.com/pingcap/tidb/util/stringutil"
 	"golang.org/x/exp/slices"
@@ -317,7 +316,10 @@ func (e *ShowExec) fetchShowBind() error {
 	} else {
 		tmp = domain.GetDomain(e.ctx).BindHandle().GetAllBindRecord()
 	}
-	bindRecords := slice.Copy(tmp)
+	bindRecords := make([]*bindinfo.BindRecord, 0)
+	for _, bindRecord := range tmp {
+		bindRecords = append(bindRecords, bindRecord.Copy())
+	}
 	// Remove the invalid bindRecord.
 	ind := 0
 	for _, bindData := range bindRecords {