Gecko [ 167.86.127.34 ]

Name	Size	Permission
testdata	[ DIR ]	drwxr-xr-x
backdoor.go	307 B	-rw-r--r--
buildid_linux.go	1.67 KB	-rw-r--r--
callback.go	111.49 KB	-rw-r--r--
callback_c.c	1.31 KB	-rw-r--r--
callback_c_gc.c	591 B	-rw-r--r--
callback_c_gccgo.c	451 B	-rw-r--r--
cgo_linux_test.go	427 B	-rw-r--r--
cgo_stubs_android_test.go	359 B	-rw-r--r--
cgo_test.go	5.56 KB	-rw-r--r--
cgo_thread_lock.go	925 B	-rw-r--r--
cgo_unix_test.go	383 B	-rw-r--r--
cthread_unix.c	682 B	-rw-r--r--
cthread_windows.c	750 B	-rw-r--r--
issue18146.go	2.79 KB	-rw-r--r--
issue20910.c	459 B	-rw-r--r--
issue21897.go	1.4 KB	-rw-r--r--
issue21897b.go	301 B	-rw-r--r--
issue31891.c	299 B	-rw-r--r--
issue4029.c	752 B	-rw-r--r--
issue4029.go	1.37 KB	-rw-r--r--
issue4029w.go	253 B	-rw-r--r--
issue4273.c	320 B	-rw-r--r--
issue4273b.c	374 B	-rw-r--r--
issue4339.c	222 B	-rw-r--r--
issue4339.h	153 B	-rw-r--r--
issue5548_c.c	454 B	-rw-r--r--
issue5740a.c	223 B	-rw-r--r--
issue5740b.c	223 B	-rw-r--r--
issue6833_c.c	303 B	-rw-r--r--
issue6907export_c.c	274 B	-rw-r--r--
issue6997_linux.c	535 B	-rw-r--r--
issue6997_linux.go	878 B	-rw-r--r--
issue7234_test.go	634 B	-rw-r--r--
issue8148.go	601 B	-rw-r--r--
issue8331.h	198 B	-rw-r--r--
issue8517.go	285 B	-rw-r--r--
issue8517_windows.c	517 B	-rw-r--r--
issue8517_windows.go	990 B	-rw-r--r--
issue8694.go	946 B	-rw-r--r--
issue8811.c	216 B	-rw-r--r--
overlaydir_test.go	1.84 KB	-rw-r--r--
pkg_test.go	1.95 KB	-rw-r--r--
setgid_linux.go	847 B	-rw-r--r--
sigaltstack.go	1.73 KB	-rw-r--r--
sigprocmask.c	1.01 KB	-rw-r--r--
sigprocmask.go	807 B	-rw-r--r--
test.go	45.38 KB	-rw-r--r--
test_unix.go	257 B	-rw-r--r--
test_windows.go	234 B	-rw-r--r--
testx.go	10.3 KB	-rw-r--r--

Code Editor : issue18146.go

// Copyright 2016 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.

// +build !windows

// Issue 18146: pthread_create failure during syscall.Exec.

package cgotest

import (
	"bytes"
	"crypto/md5"
	"os"
	"os/exec"
	"runtime"
	"syscall"
	"testing"
	"time"
)

func test18146(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping in short mode")
	}

if runtime.GOOS == "darwin" {
		t.Skipf("skipping flaky test on %s; see golang.org/issue/18202", runtime.GOOS)
	}

if runtime.GOARCH == "mips" || runtime.GOARCH == "mips64" {
		t.Skipf("skipping on %s", runtime.GOARCH)
	}

attempts := 1000
	threads := 4

// Restrict the number of attempts based on RLIMIT_NPROC.
	// Tediously, RLIMIT_NPROC was left out of the syscall package,
	// probably because it is not in POSIX.1, so we define it here.
	// It is not defined on Solaris.
	var nproc int
	setNproc := true
	switch runtime.GOOS {
	default:
		setNproc = false
	case "aix":
		nproc = 9
	case "linux":
		nproc = 6
	case "darwin", "dragonfly", "freebsd", "netbsd", "openbsd":
		nproc = 7
	}
	if setNproc {
		var rlim syscall.Rlimit
		if syscall.Getrlimit(nproc, &rlim) == nil {
			max := int(rlim.Cur) / (threads + 5)
			if attempts > max {
				t.Logf("lowering attempts from %d to %d for RLIMIT_NPROC", attempts, max)
				attempts = max
			}
		}
	}

if os.Getenv("test18146") == "exec" {
		runtime.GOMAXPROCS(1)
		for n := threads; n > 0; n-- {
			go func() {
				for {
					_ = md5.Sum([]byte("Hello, !"))
				}
			}()
		}
		runtime.GOMAXPROCS(threads)
		argv := append(os.Args, "-test.run=NoSuchTestExists")
		if err := syscall.Exec(os.Args[0], argv, os.Environ()); err != nil {
			t.Fatal(err)
		}
	}

var cmds []*exec.Cmd
	defer func() {
		for _, cmd := range cmds {
			cmd.Process.Kill()
		}
	}()

args := append(append([]string(nil), os.Args[1:]...), "-test.run=Test18146")
	for n := attempts; n > 0; n-- {
		cmd := exec.Command(os.Args[0], args...)
		cmd.Env = append(os.Environ(), "test18146=exec")
		buf := bytes.NewBuffer(nil)
		cmd.Stdout = buf
		cmd.Stderr = buf
		if err := cmd.Start(); err != nil {
			// We are starting so many processes that on
			// some systems (problem seen on Darwin,
			// Dragonfly, OpenBSD) the fork call will fail
			// with EAGAIN.
			if pe, ok := err.(*os.PathError); ok {
				err = pe.Err
			}
			if se, ok := err.(syscall.Errno); ok && (se == syscall.EAGAIN || se == syscall.EMFILE) {
				time.Sleep(time.Millisecond)
				continue
			}

t.Error(err)
			return
		}
		cmds = append(cmds, cmd)
	}

failures := 0
	for _, cmd := range cmds {
		err := cmd.Wait()
		if err == nil {
			continue
		}

t.Errorf("syscall.Exec failed: %v\n%s", err, cmd.Stdout)
		failures++
	}

if failures > 0 {
		t.Logf("Failed %v of %v attempts.", failures, len(cmds))
	}
}

${this.title}

Code Editor : issue18146.go