161 lines
4.2 KiB
Go
161 lines
4.2 KiB
Go
// Copyright 2021 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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// +build amd64
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package cmd
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import (
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"fmt"
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"io/ioutil"
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"os"
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"strings"
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"testing"
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"gvisor.dev/gvisor/runsc/mitigate/mock"
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)
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type executeTestCase struct {
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name string
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mitigateData string
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mitigateError error
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mitigateCPU int
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reverseData string
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reverseError error
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reverseCPU int
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}
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func TestExecute(t *testing.T) {
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partial := `processor : 1
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vendor_id : AuthenticAMD
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cpu family : 23
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model : 49
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model name : AMD EPYC 7B12
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physical id : 0
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bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass
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power management:
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`
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for _, tc := range []executeTestCase{
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{
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name: "CascadeLake4",
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mitigateData: mock.CascadeLake4.MakeCPUString(),
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mitigateCPU: 2,
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reverseData: mock.CascadeLake4.MakeSysPossibleString(),
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reverseCPU: 4,
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},
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{
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name: "Empty",
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mitigateData: "",
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mitigateError: fmt.Errorf(`mitigate operation failed: no cpus found for: ""`),
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reverseData: "",
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reverseError: fmt.Errorf(`reverse operation failed: mismatch regex from possible: ""`),
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},
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{
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name: "Partial",
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mitigateData: `processor : 0
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vendor_id : AuthenticAMD
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cpu family : 23
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model : 49
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model name : AMD EPYC 7B12
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physical id : 0
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core id : 0
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cpu cores : 1
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bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass
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power management::84
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` + partial,
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mitigateError: fmt.Errorf(`mitigate operation failed: failed to match key "core id": %q`, partial),
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reverseData: "1-",
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reverseError: fmt.Errorf(`reverse operation failed: mismatch regex from possible: %q`, "1-"),
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},
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} {
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t.Run(tc.name, func(t *testing.T) {
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m := &Mitigate{
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dryRun: true,
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}
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m.doExecuteTest(t, "Mitigate", tc.mitigateData, tc.mitigateCPU, tc.mitigateError)
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m.reverse = true
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m.doExecuteTest(t, "Reverse", tc.reverseData, tc.reverseCPU, tc.reverseError)
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})
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}
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}
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func TestExecuteSmoke(t *testing.T) {
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smokeMitigate, err := ioutil.ReadFile(cpuInfo)
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if err != nil {
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t.Fatalf("Failed to read %s: %v", cpuInfo, err)
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}
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m := &Mitigate{
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dryRun: true,
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}
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m.doExecuteTest(t, "Mitigate", string(smokeMitigate), 0, nil)
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smokeReverse, err := ioutil.ReadFile(allPossibleCPUs)
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if err != nil {
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t.Fatalf("Failed to read %s: %v", allPossibleCPUs, err)
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}
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m.reverse = true
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m.doExecuteTest(t, "Reverse", string(smokeReverse), 0, nil)
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}
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// doExecuteTest runs Execute with the mitigate operation and reverse operation.
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func (m *Mitigate) doExecuteTest(t *testing.T, name, data string, want int, wantErr error) {
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t.Run(name, func(t *testing.T) {
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file, err := ioutil.TempFile("", "outfile.txt")
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if err != nil {
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t.Fatalf("Failed to create tmpfile: %v", err)
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}
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defer os.Remove(file.Name())
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if _, err := file.WriteString(data); err != nil {
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t.Fatalf("Failed to write to file: %v", err)
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}
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// Set fields for mitigate and dryrun to keep test hermetic.
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m.path = file.Name()
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set, err := m.doExecute()
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if err = checkErr(wantErr, err); err != nil {
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t.Fatalf("Mitigate error mismatch: %v", err)
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}
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// case where test should end in error or we don't care
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// about how many cpus are returned.
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if wantErr != nil || want < 1 {
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return
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}
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got := len(set.GetRemainingList())
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if want != got {
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t.Fatalf("Failed wrong number of remaining CPUs: want %d, got %d", want, got)
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}
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})
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}
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// checkErr checks error for equality.
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func checkErr(want, got error) error {
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switch {
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case want == nil && got == nil:
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case want == nil || got == nil || want.Error() != strings.Trim(got.Error(), " "):
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return fmt.Errorf("got: %v want: %v", got, want)
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}
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return nil
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}
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