// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !linux
// +build !linux

package main

func gettid() int {
	return 0
}

func tidExists(tid int) (exists, supported bool, err error) {
	return false, false, nil
}

func getcwd() (string, error) {
	return "", nil
}

func unshareFs() error {
	return nil
}

package main

import (
	"bytes"
	"fmt"
	"internal/testenv"
	"io"
	"os"
	"syscall"
)

func gettid() int {
	return syscall.Gettid()
}

func tidExists(tid int) (exists, supported bool, err error) {
	// Open the magic proc status file for reading with the syscall package.
	// We want to identify certain valid errors very precisely.

		// Check that this goroutine is running on a different thread.
		if subTID != 0 && gettid() == subTID {
			println("locked thread reused")
			os.Exit(1)
		}
		exists, supported, err := tidExists(subTID)
		if err != nil {
			println("error:", err.Error())
			return
		}
		if !supported || !exists {
			goto ok
		}
	}
	println("sub thread", subTID, "still running")
	return
ok: