mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Jing Chen
95 lines
3.3 KiB
Go
95 lines
3.3 KiB
Go
// Copyright 2023 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package usage
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import (
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"math/rand"
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"reflect"
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"slices"
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"testing"
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"gvisor.dev/gvisor/pkg/bpf"
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"gvisor.dev/gvisor/pkg/seccomp"
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"gvisor.dev/gvisor/pkg/seccomp/precompiledseccomp"
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"gvisor.dev/gvisor/pkg/seccomp/precompiledseccomp/example"
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)
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// comparePrograms verifies that the precompiled and freshly-compiled programs
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// match byte-for-byte. If not, it prints them side-by-side.
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func comparePrograms(t *testing.T, precompiled, freshlyCompiled []bpf.Instruction) {
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t.Helper()
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if !slices.Equal(precompiled, freshlyCompiled) {
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t.Error("Precompiled and freshly-compiled versions of the program do not match:")
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t.Errorf(" Offset | %-32s | %-32s", "Freshly-compiled", "Compiled")
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for i := 0; i < max(len(precompiled), len(freshlyCompiled)); i++ {
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switch {
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case i < len(precompiled) && i < len(freshlyCompiled):
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if reflect.DeepEqual(precompiled[i], freshlyCompiled[i]) {
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t.Errorf(" OK %04d | %-32s | %-32s", i, freshlyCompiled[i].String(), precompiled[i].String())
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} else {
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t.Errorf(" DIFF %04d | %-32s | %-32s", i, freshlyCompiled[i].String(), precompiled[i].String())
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}
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case i < len(precompiled):
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t.Errorf(" DIFF %04d | %-32s | %-32s", i, "(end)", precompiled[i].String())
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case i < len(freshlyCompiled):
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t.Errorf(" DIFF %04d | %-32s | %-32s", i, freshlyCompiled[i].String(), "(end)")
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}
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}
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}
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}
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// TestProgram1 verifies that the precompiled version of the Program1 program
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// matches a freshly-compiled version byte-for-byte.
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func TestProgram1(t *testing.T) {
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fd1 := rand.Uint32()
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fd2 := fd1 + 1
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precompiled := LoadProgram1(fd1, fd2)
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prog := example.Program1(precompiledseccomp.Values{
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example.FD1: fd1,
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example.FD2: fd2,
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})
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freshlyCompiled, _, err := seccomp.BuildProgram(prog.Rules, prog.SeccompOptions)
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if err != nil {
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t.Fatalf("cannot freshly compile the program: %v", err)
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}
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comparePrograms(t, precompiled, freshlyCompiled)
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}
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// TestProgram2 verifies that the precompiled version of the Program2 program
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// matches a freshly-compiled version byte-for-byte.
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func TestProgram2(t *testing.T) {
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fd1 := rand.Uint32()
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fd2 := fd1 + 1
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precompiled := LoadProgram2(fd1, fd2)
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prog := example.Program2(precompiledseccomp.Values{
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example.FD1: fd1,
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example.FD2: fd2,
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})
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freshlyCompiled, _, err := seccomp.BuildProgram(prog.Rules, prog.SeccompOptions)
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if err != nil {
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t.Fatalf("cannot freshly compile the program: %v", err)
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}
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comparePrograms(t, precompiled, freshlyCompiled)
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}
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// TestNonExistentProgram verifies that invalid program names don't exist.
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func TestNonExistentProgram(t *testing.T) {
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const nonExistentProgram = "this program name does not exist"
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got, found := GetPrecompiled(nonExistentProgram)
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if found {
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t.Fatalf("unexpectedly found program named %q: %v", nonExistentProgram, got)
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}
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}
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