github.com/likebike/go--@v0.0.0-20190911215757-0bd925d16e96/go/src/runtime/testdata/testprog/gettid.go (about)

     1  // Copyright 2017 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build linux
     6  
     7  package main
     8  
     9  import (
    10  	"bytes"
    11  	"fmt"
    12  	"io/ioutil"
    13  	"os"
    14  	"syscall"
    15  )
    16  
    17  func gettid() int {
    18  	return syscall.Gettid()
    19  }
    20  
    21  func tidExists(tid int) (exists, supported bool) {
    22  	stat, err := ioutil.ReadFile(fmt.Sprintf("/proc/self/task/%d/stat", tid))
    23  	if os.IsNotExist(err) {
    24  		return false, true
    25  	}
    26  	// Check if it's a zombie thread.
    27  	state := bytes.Fields(stat)[2]
    28  	return !(len(state) == 1 && state[0] == 'Z'), true
    29  }