af146490bb
It is not needed due to the removal of the ctx field.
Reviewed-on: https://go-review.googlesource.com/16525
From-SVN: r229616
136 lines
2.9 KiB
Go
136 lines
2.9 KiB
Go
// 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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// +build darwin dragonfly freebsd linux netbsd openbsd solaris
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package runtime_test
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import (
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"bytes"
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"internal/testenv"
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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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"runtime"
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"syscall"
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"testing"
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)
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func TestCrashDumpsAllThreads(t *testing.T) {
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switch runtime.GOOS {
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case "darwin", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "solaris":
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default:
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t.Skipf("skipping; not supported on %v", runtime.GOOS)
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}
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// We don't use executeTest because we need to kill the
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// program while it is running.
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testenv.MustHaveGoBuild(t)
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checkStaleRuntime(t)
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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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if err := ioutil.WriteFile(filepath.Join(dir, "main.go"), []byte(crashDumpsAllThreadsSource), 0666); err != nil {
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t.Fatalf("failed to create Go file: %v", err)
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}
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cmd := exec.Command("go", "build", "-o", "a.exe")
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cmd.Dir = dir
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out, err := testEnv(cmd).CombinedOutput()
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if err != nil {
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t.Fatalf("building source: %v\n%s", err, out)
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}
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cmd = exec.Command(filepath.Join(dir, "a.exe"))
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cmd = testEnv(cmd)
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cmd.Env = append(cmd.Env, "GOTRACEBACK=crash")
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var outbuf bytes.Buffer
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cmd.Stdout = &outbuf
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cmd.Stderr = &outbuf
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rp, wp, err := os.Pipe()
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if err != nil {
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t.Fatal(err)
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}
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cmd.ExtraFiles = []*os.File{wp}
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if err := cmd.Start(); err != nil {
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t.Fatalf("starting program: %v", err)
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}
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if err := wp.Close(); err != nil {
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t.Logf("closing write pipe: %v", err)
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}
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if _, err := rp.Read(make([]byte, 1)); err != nil {
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t.Fatalf("reading from pipe: %v", err)
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}
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if err := cmd.Process.Signal(syscall.SIGQUIT); err != nil {
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t.Fatalf("signal: %v", err)
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}
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// No point in checking the error return from Wait--we expect
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// it to fail.
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cmd.Wait()
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// We want to see a stack trace for each thread.
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// Before https://golang.org/cl/2811 running threads would say
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// "goroutine running on other thread; stack unavailable".
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out = outbuf.Bytes()
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n := bytes.Count(out, []byte("main.loop("))
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if n != 4 {
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t.Errorf("found %d instances of main.loop; expected 4", n)
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t.Logf("%s", out)
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}
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}
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const crashDumpsAllThreadsSource = `
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package main
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import (
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"fmt"
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"os"
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"runtime"
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)
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func main() {
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const count = 4
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runtime.GOMAXPROCS(count + 1)
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chans := make([]chan bool, count)
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for i := range chans {
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chans[i] = make(chan bool)
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go loop(i, chans[i])
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}
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// Wait for all the goroutines to start executing.
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for _, c := range chans {
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<-c
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}
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// Tell our parent that all the goroutines are executing.
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if _, err := os.NewFile(3, "pipe").WriteString("x"); err != nil {
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fmt.Fprintf(os.Stderr, "write to pipe failed: %v\n", err)
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os.Exit(2)
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}
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select {}
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}
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func loop(i int, c chan bool) {
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close(c)
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for {
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for j := 0; j < 0x7fffffff; j++ {
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}
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}
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}
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`
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