mirror of
https://github.com/golang/go
synced 2024-11-12 09:20:22 -07:00
65 lines
1.2 KiB
Go
65 lines
1.2 KiB
Go
|
// +build !nacl
|
||
|
|
// run
|
||
|
|
|
||
|
|
// Copyright 2015 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.
|
||
|
|
|
||
|
|
// Issue 11771: Magic comments should ignore carriage returns.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"fmt"
|
||
|
|
"io/ioutil"
|
||
|
|
"log"
|
||
|
|
"os"
|
||
|
|
"os/exec"
|
||
|
|
"path/filepath"
|
||
|
|
"runtime"
|
||
|
|
)
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
if runtime.Compiler != "gc" {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
dir, err := ioutil.TempDir("", "go-issue11771")
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("creating temp dir: %v\n", err)
|
||
|
|
}
|
||
|
|
defer os.RemoveAll(dir)
|
||
|
|
|
||
|
|
// The go:nowritebarrier magic comment is only permitted in
|
||
|
|
// the runtime package. So we confirm that the compilation
|
||
|
|
// fails.
|
||
|
|
|
||
|
|
var buf bytes.Buffer
|
||
|
|
fmt.Fprintln(&buf, `
|
||
|
|
package main
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
}
|
||
|
|
`)
|
||
|
|
fmt.Fprintln(&buf, "//go:nowritebarrier\r")
|
||
|
|
fmt.Fprintln(&buf, `
|
||
|
|
func x() {
|
||
|
|
}
|
||
|
|
`)
|
||
|
|
|
||
|
|
if err := ioutil.WriteFile(filepath.Join(dir, "x.go"), buf.Bytes(), 0666); err != nil {
|
||
|
|
log.Fatal(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
cmd := exec.Command("go", "tool", "compile", "x.go")
|
||
|
|
cmd.Dir = dir
|
||
|
|
output, err := cmd.CombinedOutput()
|
||
|
|
if err == nil {
|
||
|
|
log.Fatal("compile succeeded unexpectedly")
|
||
|
|
}
|
||
|
|
if !bytes.Contains(output, []byte("only allowed in runtime")) {
|
||
|
|
log.Fatalf("wrong error message from compiler; got:\n%s\n", output)
|
||
|
|
}
|
||
|
|
}
|