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// Copyright 2012 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.
package runtime_test
import (
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
"text/template"
)
type crashTest struct {
Cgo bool
}
// This test is a separate program, because it is testing
// both main (m0) and non-main threads (m).
func testCrashHandler(t *testing.T, ct *crashTest) {
if runtime.GOOS == "freebsd" || runtime.GOOS == "netbsd" {
// TODO(brainman): do not know why this test fails on freebsd
// TODO(jsing): figure out why this causes delayed failures
// on NetBSD - http://golang.org/issue/3954
t.Logf("skipping test on %q", runtime.GOOS)
return
}
st := template.Must(template.New("crashSource").Parse(crashSource))
dir, err := ioutil.TempDir("", "go-build")
if err != nil {
t.Fatalf("failed to create temp directory: %v", err)
}
defer os.RemoveAll(dir)
src := filepath.Join(dir, "main.go")
f, err := os.Create(src)
if err != nil {
t.Fatalf("failed to create %v: %v", src, err)
}
err = st.Execute(f, ct)
if err != nil {
f.Close()
t.Fatalf("failed to execute template: %v", err)
}
f.Close()
got, err := exec.Command("go", "run", src).CombinedOutput()
if err != nil {
t.Fatalf("program exited with error: %v\n%v", err, string(got))
}
want := "main: recovered done\nnew-thread: recovered done\nsecond-new-thread: recovered done\nmain-again: recovered done\n"
if string(got) != string(want) {
t.Fatalf("expected %q, but got %q", string(want), string(got))
}
}
func TestCrashHandler(t *testing.T) {
testCrashHandler(t, &crashTest{Cgo: false})
}
const crashSource = `
package main
import (
"fmt"
"runtime"
)
{{if .Cgo}}
import "C"
{{end}}
func test(name string) {
defer func() {
if x := recover(); x != nil {
fmt.Printf(" recovered")
}
fmt.Printf(" done\n")
}()
fmt.Printf("%s:", name)
var s *string
_ = *s
fmt.Print("SHOULD NOT BE HERE")
}
func testInNewThread(name string) {
c := make(chan bool)
go func() {
runtime.LockOSThread()
test(name)
c <- true
}()
<-c
}
func main() {
runtime.LockOSThread()
test("main")
testInNewThread("new-thread")
testInNewThread("second-new-thread")
test("main-again")
}
`
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