Gecko [ 167.86.127.34 ]

Name	Size	Permission
windows	[ DIR ]	drwxr-xr-x
aprof.go	947 B	-rw-r--r--
bigstack_windows.c	1.2 KB	-rw-r--r--
bigstack_windows.go	578 B	-rw-r--r--
callback.go	1.38 KB	-rw-r--r--
catchpanic.go	963 B	-rw-r--r--
cgo.go	1.82 KB	-rw-r--r--
crash.go	743 B	-rw-r--r--
deadlock.go	509 B	-rw-r--r--
dll_windows.go	459 B	-rw-r--r--
dropm.go	1.02 KB	-rw-r--r--
dropm_stub.go	333 B	-rw-r--r--
exec.go	2.06 KB	-rw-r--r--
lockosthread.c	301 B	-rw-r--r--
lockosthread.go	2.56 KB	-rw-r--r--
main.go	651 B	-rw-r--r--
numgoroutine.go	1.89 KB	-rw-r--r--
pprof.go	1.88 KB	-rw-r--r--
raceprof.go	1.68 KB	-rw-r--r--
racesig.go	1.89 KB	-rw-r--r--
sigpanic.go	484 B	-rw-r--r--
sigstack.go	2.06 KB	-rw-r--r--
stack_windows.go	987 B	-rw-r--r--
threadpanic.go	410 B	-rw-r--r--
threadpanic_unix.c	435 B	-rw-r--r--
threadpanic_windows.c	435 B	-rw-r--r--
threadpprof.go	2.36 KB	-rw-r--r--
threadprof.go	2.11 KB	-rw-r--r--
traceback.go	1.42 KB	-rw-r--r--
tracebackctxt.go	2.17 KB	-rw-r--r--
tracebackctxt_c.c	2.02 KB	-rw-r--r--

Code Editor : numgoroutine.go

// Copyright 2017 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 !plan9,!windows

package main

/*
#include <stddef.h>
#include <pthread.h>

extern void CallbackNumGoroutine();

static void* thread2(void* arg __attribute__ ((unused))) {
	CallbackNumGoroutine();
	return NULL;
}

static void CheckNumGoroutine() {
	pthread_t tid;
	pthread_create(&tid, NULL, thread2, NULL);
	pthread_join(tid, NULL);
}
*/
import "C"

import (
	"fmt"
	"runtime"
	"strings"
)

var baseGoroutines int

func init() {
	register("NumGoroutine", NumGoroutine)
}

func NumGoroutine() {
	// Test that there are just the expected number of goroutines
	// running. Specifically, test that the spare M's goroutine
	// doesn't show up.
	if _, ok := checkNumGoroutine("first", 1+baseGoroutines); !ok {
		return
	}

// Test that the goroutine for a callback from C appears.
	if C.CheckNumGoroutine(); !callbackok {
		return
	}

// Make sure we're back to the initial goroutines.
	if _, ok := checkNumGoroutine("third", 1+baseGoroutines); !ok {
		return
	}

fmt.Println("OK")
}

func checkNumGoroutine(label string, want int) (string, bool) {
	n := runtime.NumGoroutine()
	if n != want {
		fmt.Printf("%s NumGoroutine: want %d; got %d\n", label, want, n)
		return "", false
	}

sbuf := make([]byte, 32<<10)
	sbuf = sbuf[:runtime.Stack(sbuf, true)]
	n = strings.Count(string(sbuf), "goroutine ")
	if n != want {
		fmt.Printf("%s Stack: want %d; got %d:\n%s\n", label, want, n, string(sbuf))
		return "", false
	}
	return string(sbuf), true
}

var callbackok bool

//export CallbackNumGoroutine
func CallbackNumGoroutine() {
	stk, ok := checkNumGoroutine("second", 2+baseGoroutines)
	if !ok {
		return
	}
	if !strings.Contains(stk, "CallbackNumGoroutine") {
		fmt.Printf("missing CallbackNumGoroutine from stack:\n%s\n", stk)
		return
	}

callbackok = true
}

${this.title}

Code Editor : numgoroutine.go