// Copyright 2016 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package bpf_test import ( "testing" "golang.org/x/net/bpf" ) func TestVMLoadExtensionNotImplemented(t *testing.T) { _, _, err := testVM(t, []bpf.Instruction{ bpf.LoadExtension{ Num: 100, }, bpf.RetA{}, }) if errStr(err) != "extension 100 not implemented" { t.Fatalf("unexpected error: %v", err) } } func TestVMLoadExtensionExtLen(t *testing.T) { vm, done, err := testVM(t, []bpf.Instruction{ bpf.LoadExtension{ Num: bpf.ExtLen, }, bpf.RetA{}, }) if err != nil { t.Fatalf("failed to load BPF program: %v", err) } defer done() out, err := vm.Run([]byte{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 1, 2, 3, }) if err != nil { t.Fatalf("unexpected error while running program: %v", err) } if want, got := 4, out; want != got { t.Fatalf("unexpected number of output bytes:\n- want: %d\n- got: %d", want, got) } }