mirror of
https://github.com/autc04/Retro68.git
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276 lines
5.2 KiB
Go
276 lines
5.2 KiB
Go
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// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime_test
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import (
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"testing"
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"text/template"
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)
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// testEnv excludes GODEBUG from the environment
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// to prevent its output from breaking tests that
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// are trying to parse other command output.
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func testEnv(cmd *exec.Cmd) *exec.Cmd {
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if cmd.Env != nil {
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panic("environment already set")
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}
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for _, env := range os.Environ() {
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if strings.HasPrefix(env, "GODEBUG=") {
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continue
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}
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cmd.Env = append(cmd.Env, env)
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}
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return cmd
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}
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func executeTest(t *testing.T, templ string, data interface{}) string {
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t.Skip("gccgo does not have a go command")
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checkStaleRuntime(t)
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st := template.Must(template.New("crashSource").Parse(templ))
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dir, err := ioutil.TempDir("", "go-build")
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if err != nil {
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t.Fatalf("failed to create temp directory: %v", err)
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}
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defer os.RemoveAll(dir)
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src := filepath.Join(dir, "main.go")
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f, err := os.Create(src)
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if err != nil {
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t.Fatalf("failed to create file: %v", err)
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}
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err = st.Execute(f, data)
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if err != nil {
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f.Close()
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t.Fatalf("failed to execute template: %v", err)
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}
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if err := f.Close(); err != nil {
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t.Fatalf("failed to close file: %v", err)
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}
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got, _ := testEnv(exec.Command("go", "run", src)).CombinedOutput()
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return string(got)
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}
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func checkStaleRuntime(t *testing.T) {
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// 'go run' uses the installed copy of runtime.a, which may be out of date.
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out, err := testEnv(exec.Command("go", "list", "-f", "{{.Stale}}", "runtime")).CombinedOutput()
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if err != nil {
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t.Fatalf("failed to execute 'go list': %v\n%v", err, string(out))
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}
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if string(out) != "false\n" {
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t.Fatalf("Stale runtime.a. Run 'go install runtime'.")
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}
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}
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func testCrashHandler(t *testing.T, cgo bool) {
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type crashTest struct {
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Cgo bool
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}
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output := executeTest(t, crashSource, &crashTest{Cgo: cgo})
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want := "main: recovered done\nnew-thread: recovered done\nsecond-new-thread: recovered done\nmain-again: recovered done\n"
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if output != want {
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t.Fatalf("output:\n%s\n\nwanted:\n%s", output, want)
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}
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}
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func TestCrashHandler(t *testing.T) {
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testCrashHandler(t, false)
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}
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func testDeadlock(t *testing.T, source string) {
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output := executeTest(t, source, nil)
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want := "fatal error: all goroutines are asleep - deadlock!\n"
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if !strings.HasPrefix(output, want) {
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t.Fatalf("output does not start with %q:\n%s", want, output)
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}
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}
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func TestSimpleDeadlock(t *testing.T) {
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testDeadlock(t, simpleDeadlockSource)
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}
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func TestInitDeadlock(t *testing.T) {
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testDeadlock(t, initDeadlockSource)
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}
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func TestLockedDeadlock(t *testing.T) {
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testDeadlock(t, lockedDeadlockSource)
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}
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func TestLockedDeadlock2(t *testing.T) {
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testDeadlock(t, lockedDeadlockSource2)
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}
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func TestGoexitDeadlock(t *testing.T) {
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output := executeTest(t, goexitDeadlockSource, nil)
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if output != "" {
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t.Fatalf("expected no output, got:\n%s", output)
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}
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}
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func TestStackOverflow(t *testing.T) {
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output := executeTest(t, stackOverflowSource, nil)
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want := "runtime: goroutine stack exceeds 4194304-byte limit\nfatal error: stack overflow"
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if !strings.HasPrefix(output, want) {
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t.Fatalf("output does not start with %q:\n%s", want, output)
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}
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}
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func TestThreadExhaustion(t *testing.T) {
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output := executeTest(t, threadExhaustionSource, nil)
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want := "runtime: program exceeds 10-thread limit\nfatal error: thread exhaustion"
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if !strings.HasPrefix(output, want) {
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t.Fatalf("output does not start with %q:\n%s", want, output)
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}
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}
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const crashSource = `
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package main
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import (
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"fmt"
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"runtime"
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)
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{{if .Cgo}}
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import "C"
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{{end}}
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func test(name string) {
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defer func() {
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if x := recover(); x != nil {
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fmt.Printf(" recovered")
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}
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fmt.Printf(" done\n")
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}()
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fmt.Printf("%s:", name)
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var s *string
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_ = *s
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fmt.Print("SHOULD NOT BE HERE")
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}
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func testInNewThread(name string) {
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c := make(chan bool)
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go func() {
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runtime.LockOSThread()
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test(name)
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c <- true
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}()
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<-c
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}
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func main() {
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runtime.LockOSThread()
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test("main")
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testInNewThread("new-thread")
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testInNewThread("second-new-thread")
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test("main-again")
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}
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`
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const simpleDeadlockSource = `
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package main
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func main() {
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select {}
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}
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`
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const initDeadlockSource = `
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package main
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func init() {
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select {}
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}
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func main() {
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}
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`
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const lockedDeadlockSource = `
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package main
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import "runtime"
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func main() {
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runtime.LockOSThread()
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select {}
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}
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`
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const lockedDeadlockSource2 = `
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package main
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import (
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"runtime"
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"time"
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)
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func main() {
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go func() {
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runtime.LockOSThread()
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select {}
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}()
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time.Sleep(time.Millisecond)
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select {}
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}
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`
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const goexitDeadlockSource = `
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package main
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import (
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"runtime"
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)
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func F() {
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for i := 0; i < 10; i++ {
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}
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}
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func main() {
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go F()
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go F()
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runtime.Goexit()
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}
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`
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const stackOverflowSource = `
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package main
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import "runtime/debug"
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func main() {
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debug.SetMaxStack(4<<20)
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f(make([]byte, 10))
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}
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func f(x []byte) byte {
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var buf [64<<10]byte
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return x[0] + f(buf[:])
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}
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`
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const threadExhaustionSource = `
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package main
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import (
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"runtime"
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"runtime/debug"
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)
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func main() {
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debug.SetMaxThreads(10)
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c := make(chan int)
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for i := 0; i < 100; i++ {
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go func() {
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runtime.LockOSThread()
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c <- 0
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select{}
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}()
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<-c
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}
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}
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`
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