Improve StackTraceMsg (#14461)

Signed-off-by: dragondriver <jiquan.long@zilliz.com>

internal/util/trace/stack_trace.go

@@ -16,13 +16,16 @@ import (
 	"runtime"
 )
 
-const numFuncsInStack = 10
+const (
+	numFuncsInStack = 10
+	frameNumToSkip  = 2
+)
 
 // StackTraceMsg returns the stack information, which numFuncs means how many functions do you want to show in the stack
 // information.
 func StackTraceMsg(numFuncs uint) string {
 	pc := make([]uintptr, numFuncs)
-	n := runtime.Callers(0, pc)
+	n := runtime.Callers(frameNumToSkip, pc)
 	frames := runtime.CallersFrames(pc[:n])
 
 	ret := ""

internal/util/trace/stack_trace_test.go

@@ -16,6 +16,14 @@ import (
 	"testing"
 )
 
+func testStackTrace() {
+	fmt.Println(StackTraceMsg(1))
+	fmt.Println(StackTraceMsg(5))
+	fmt.Println(StackTraceMsg(10))
+
+	fmt.Println(StackTrace())
+}
+
 func TestStackTraceMsg(t *testing.T) {
 	fmt.Println(StackTraceMsg(1))
 	fmt.Println(StackTraceMsg(5))
@@ -30,6 +38,8 @@ func TestStackTraceMsg(t *testing.T) {
 			fmt.Println(StackTraceMsg(10))
 		}()
 	}()
+
+	testStackTrace()
 }
 
 func TestStackTrace(t *testing.T) {