Function runDoSCase

json_fuzz_test.go:1687–1712

runDoSCase runs one op under the DoS budget. A panic or a timeout exceeds the budget — either is a finding.

(t *testing.T, opName string, data []byte, fn func())

// runDoSCase runs one op under the DoS budget. A panic or a timeout exceeds
// the budget — either is a finding.
func runDoSCase(t *testing.T, opName string, data []byte, fn func()) {
	t.Helper()
	done := make(chan struct{})
	start := time.Now()
	go func() {
		defer func() {
			if r := recover(); r != nil {
				t.Errorf("PANIC in %s on %d-byte input (DoS gate): %v\n%s",
					opName, len(data), r, debug.Stack())
			}
			close(done)
		}()
		fn()
	}()
	select {
	case <-done:
		elapsed := time.Since(start)
		if elapsed > dosOpBudget {
			t.Errorf("%s took %v on %d-byte input (DoS budget %v exceeded)",
				opName, elapsed, len(data), dosOpBudget)
		}
	case <-time.After(dosOpBudget):
		t.Fatalf("%s hung > %v on %d-byte input (DoS regression)",
			opName, dosOpBudget, len(data))
	}
}