mirror of
https://github.com/kata-containers/kata-containers.git
synced 2025-10-22 12:29:49 +00:00
6191ddffb3
Rework the signal handling code so that if debug is enabled and a `SIGUSR1` signal is received, backtrace to the system log but continue to run. Added some basic tests for the signal handling code. Fixes #241. Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
128 lines
2.3 KiB
Go
128 lines
2.3 KiB
Go
// Copyright (c) 2018 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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package main
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import (
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"bytes"
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"reflect"
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goruntime "runtime"
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"sort"
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"strings"
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"syscall"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestSignalFatalSignal(t *testing.T) {
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assert := assert.New(t)
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for sig, fatal := range handledSignalsMap {
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result := nonFatalSignal(sig)
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if fatal {
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assert.False(result)
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} else {
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assert.True(result)
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}
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}
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}
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func TestSignalHandledSignalsMap(t *testing.T) {
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assert := assert.New(t)
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for sig, fatal := range handledSignalsMap {
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result := fatalSignal(sig)
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if fatal {
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assert.True(result)
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} else {
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assert.False(result)
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}
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}
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}
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func TestSignalHandledSignals(t *testing.T) {
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assert := assert.New(t)
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var expected []syscall.Signal
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for sig := range handledSignalsMap {
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expected = append(expected, sig)
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}
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got := handledSignals()
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sort.Slice(expected, func(i, j int) bool {
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return int(expected[i]) < int(expected[j])
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})
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sort.Slice(got, func(i, j int) bool {
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return int(got[i]) < int(got[j])
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})
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assert.True(reflect.DeepEqual(expected, got))
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}
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func TestSignalNonFatalSignal(t *testing.T) {
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assert := assert.New(t)
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for sig, fatal := range handledSignalsMap {
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result := nonFatalSignal(sig)
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if fatal {
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assert.False(result)
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} else {
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assert.True(result)
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}
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}
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}
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func TestSignalFatalSignalInvalidSignal(t *testing.T) {
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assert := assert.New(t)
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sig := syscall.SIGXCPU
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result := fatalSignal(sig)
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assert.False(result)
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}
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func TestSignalNonFatalSignalInvalidSignal(t *testing.T) {
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assert := assert.New(t)
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sig := syscall.SIGXCPU
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result := nonFatalSignal(sig)
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assert.False(result)
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}
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func TestSignalBacktrace(t *testing.T) {
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assert := assert.New(t)
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// create buffer to save logger output
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buf := &bytes.Buffer{}
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savedOut := kataLog.Logger.Out
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defer func() {
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kataLog.Logger.Out = savedOut
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}()
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// capture output to buffer
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kataLog.Logger.Out = buf
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// determine name of *this* function
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pc := make([]uintptr, 1)
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goruntime.Callers(1, pc)
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fn := goruntime.FuncForPC(pc[0])
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name := fn.Name()
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backtrace()
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b := buf.String()
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// very basic tests to check if a backtrace was produced
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assert.True(strings.Contains(b, "contention:"))
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assert.True(strings.Contains(b, `"level":"error"`))
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assert.True(strings.Contains(b, name))
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}
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