reqPath := r.URL.RawPath
		if reqPath == "" {
			reqPath = r.URL.Path
		}

		// Calculate function name
		funcName := tc.FuncName
		if funcName == "" {
			funcName = "<unknown>"
		}

		t := madmin.TraceInfo{
			TraceType: tt,
			FuncName:  funcName,
			NodeName:  nodeName,
			Time:      reqStartTime,
			Duration:  reqEndTime.Sub(respRecorder.StartTime),
			Path:      reqPath,

func testAddr2Line(t *testing.T, dbgExePath, addr string) {
	funcName, srcPath, srcLineNo := runAddr2Line(t, dbgExePath, addr)
	if symName != funcName {
		t.Fatalf("expected function name %v; got %v", symName, funcName)
	}
	fi1, err := os.Stat("addr2line_test.go")
	if err != nil {
		t.Fatalf("Stat failed: %v", err)
	}

	// Debug paths are stored slash-separated, so convert to system-native.
	srcPath = filepath.FromSlash(srcPath)

}

func getSource(n int) string {
	var funcName string
	pc, filename, lineNum, ok := runtime.Caller(n)
	if ok {
		filename = pathutil.Base(filename)
		funcName = strings.TrimPrefix(runtime.FuncForPC(pc).Name(),
			"github.com/minio/minio/cmd.")
	} else {
		filename = "<unknown>"
		lineNum = 0
	}

	return fmt.Sprintf("[%s:%d:%s()]", filename, lineNum, funcName)

}

// Execute f on each test case.  funcName should be the name of f; it's used
// in failure reports.
func runIndexTests(t *testing.T, f func(s, sep []byte) int, funcName string, testCases []BinOpTest) {
	for _, test := range testCases {
		a := []byte(test.a)
		b := []byte(test.b)
		actual := f(a, b)
		if actual != test.i {
			t.Errorf("%s(%q,%q) = %v; want %v", funcName, a, b, actual, test.i)
		}
	}

	// Add tracing to the prom. handler
	tracedHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			tc.FuncName = "handler.MetricsV3"
			tc.ResponseRecorder.LogErrBody = true
		}

		innerHandler.ServeHTTP(w, r)
	})

	// Add authentication
	h.authFn(tracedHandler).ServeHTTP(w, r)

	var errStr string
	if err != nil {
		errStr = err.Error()
	}
	funcName := fmt.Sprintf("replication.(resyncID=%s)", resyncID)
	return madmin.TraceInfo{
		TraceType: madmin.TraceReplicationResync,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  funcName,
		Duration:  duration,
		Path:      path,
		Error:     errStr,
	}
}

// TraceCtxt holds related tracing data of a http request.
type TraceCtxt struct {
	RequestRecorder  *xhttp.RequestRecorder
	ResponseRecorder *xhttp.ResponseRecorder

	FuncName string
	AmzReqID string

		registry,
	}

	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
		if ok {
			tc.FuncName = "handler.MetricsLegacy"
			tc.ResponseRecorder.LogErrBody = true
		}

		mfs, err := gatherers.Gather()
		if err != nil {
			if len(mfs) == 0 {

func ilmTrace(startTime time.Time, duration time.Duration, oi ObjectInfo, event string) madmin.TraceInfo {
	return madmin.TraceInfo{
		TraceType: madmin.TraceILM,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  event,
		Duration:  duration,
		Path:      pathJoin(oi.Bucket, oi.Name),
		Error:     "",
		Message:   getSource(4),
		Custom:    map[string]string{"version-id": oi.VersionID},
	}
}

		} else {
			status = http.StatusBadRequest
		}
	}

	prefix := t.Prefix
	if p := handlerPrefixes[h]; p != "" {
		prefix = p
	}
	trace := madmin.TraceInfo{
		TraceType: t.TraceType,
		FuncName:  prefix + "." + h.String(),
		NodeName:  remote,
		Time:      start,
		Duration:  end.Sub(start),
		Path:      t.Subroute,
		Error:     errString,
		HTTP: &madmin.TraceHTTPStats{