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https://github.com/golang/go
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1be957d703
This is needed for typical tests with gccgo, as it passes the LD_LIBRARY_PATH environment variable to the new program. Change-Id: I9bf4b0dbdff63f5449c7fcb8124eaeab10ed7f34 Reviewed-on: https://go-review.googlesource.com/35481 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
129 lines
2.8 KiB
Go
129 lines
2.8 KiB
Go
// Copyright 2016 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 !windows
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// Issue 18146: pthread_create failure during syscall.Exec.
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package cgotest
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import "C"
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import (
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"bytes"
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"crypto/md5"
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"os"
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"os/exec"
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"runtime"
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"syscall"
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"testing"
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"time"
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)
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func test18146(t *testing.T) {
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if runtime.GOOS == "darwin" {
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t.Skipf("skipping flaky test on %s; see golang.org/issue/18202", runtime.GOOS)
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}
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if runtime.GOARCH == "mips" || runtime.GOARCH == "mips64" {
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t.Skipf("skipping on %s", runtime.GOARCH)
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}
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attempts := 1000
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threads := 4
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if testing.Short() {
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attempts = 100
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}
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// Restrict the number of attempts based on RLIMIT_NPROC.
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// Tediously, RLIMIT_NPROC was left out of the syscall package,
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// probably because it is not in POSIX.1, so we define it here.
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// It is not defined on Solaris.
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var nproc int
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setNproc := true
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switch runtime.GOOS {
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default:
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setNproc = false
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case "linux":
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nproc = 6
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case "darwin", "dragonfly", "freebsd", "netbsd", "openbsd":
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nproc = 7
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}
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if setNproc {
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var rlim syscall.Rlimit
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if syscall.Getrlimit(nproc, &rlim) == nil {
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max := int(rlim.Cur) / (threads + 5)
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if attempts > max {
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t.Logf("lowering attempts from %d to %d for RLIMIT_NPROC", attempts, max)
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attempts = max
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}
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}
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}
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if os.Getenv("test18146") == "exec" {
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runtime.GOMAXPROCS(1)
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for n := threads; n > 0; n-- {
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go func() {
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for {
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_ = md5.Sum([]byte("Hello, !"))
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}
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}()
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}
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runtime.GOMAXPROCS(threads)
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argv := append(os.Args, "-test.run=NoSuchTestExists")
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if err := syscall.Exec(os.Args[0], argv, os.Environ()); err != nil {
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t.Fatal(err)
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}
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}
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var cmds []*exec.Cmd
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defer func() {
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for _, cmd := range cmds {
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cmd.Process.Kill()
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}
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}()
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args := append(append([]string(nil), os.Args[1:]...), "-test.run=Test18146")
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for n := attempts; n > 0; n-- {
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cmd := exec.Command(os.Args[0], args...)
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cmd.Env = append(os.Environ(), "test18146=exec")
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buf := bytes.NewBuffer(nil)
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cmd.Stdout = buf
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cmd.Stderr = buf
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if err := cmd.Start(); err != nil {
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// We are starting so many processes that on
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// some systems (problem seen on Darwin,
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// Dragonfly, OpenBSD) the fork call will fail
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// with EAGAIN.
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if pe, ok := err.(*os.PathError); ok {
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err = pe.Err
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}
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if se, ok := err.(syscall.Errno); ok && (se == syscall.EAGAIN || se == syscall.EMFILE) {
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time.Sleep(time.Millisecond)
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continue
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}
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t.Error(err)
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return
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}
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cmds = append(cmds, cmd)
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}
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failures := 0
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for _, cmd := range cmds {
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err := cmd.Wait()
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if err == nil {
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continue
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}
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t.Errorf("syscall.Exec failed: %v\n%s", err, cmd.Stdout)
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failures++
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}
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if failures > 0 {
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t.Logf("Failed %v of %v attempts.", failures, len(cmds))
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}
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}
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