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Current Path: /opt/golang/1.22.0/src/runtime/testdata/testprogcgo

opt / golang / 1.22.0 / src / runtime / testdata / testprogcgo /

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📄 aprof.go(1.14 KB)
📄 aprof_c.c(217 B)
📄 bigstack1_windows.c(379 B)
📄 bigstack_windows.c(1.2 KB)
📄 bigstack_windows.go(586 B)
📄 bindm.c(692 B)
📄 bindm.go(1.2 KB)
📄 callback.go(1.86 KB)
📄 catchpanic.go(993 B)
📄 cgo.go(1.82 KB)
📄 cgonocallback.c(236 B)
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📄 crash.go(743 B)
📄 deadlock.go(509 B)
📄 destructor.c(459 B)
📄 destructor.go(442 B)
📄 dll_windows.go(459 B)
📄 dropm.go(1.05 KB)
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📄 exec.go(2.1 KB)
📄 gprof.go(868 B)
📄 gprof_c.c(700 B)
📄 issue29707.go(1.15 KB)
📄 lockosthread.c(301 B)
📄 lockosthread.go(2.52 KB)
📄 main.go(651 B)
📄 needmdeadlock.go(1.83 KB)
📄 numgoroutine.go(1.91 KB)
📄 panic.c(239 B)
📄 panic.go(312 B)
📄 pprof.go(1.67 KB)
📄 pprof_callback.go(1.82 KB)
📄 raceprof.go(1.67 KB)
📄 racesig.go(1.67 KB)
📄 segv.go(525 B)
📄 segv_linux.go(546 B)
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📄 stack_windows.go(1.1 KB)
📄 stackswitch.c(3.88 KB)
📄 stackswitch.go(1.07 KB)
📄 threadpanic.go(428 B)
📄 threadpanic_unix.c(435 B)
📄 threadpanic_windows.c(435 B)
📄 threadpprof.go(2.54 KB)
📄 threadprof.go(2.41 KB)
📄 trace.go(1.15 KB)
📄 trace_unix.c(688 B)
📄 trace_windows.c(777 B)
📄 traceback.go(949 B)
📄 traceback_c.c(1.21 KB)
📄 tracebackctxt.go(2.85 KB)
📄 tracebackctxt_c.c(2.33 KB)
📁 windows

Editing: 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.

//go:build !plan9 && !windows
// +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, 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
}

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Editing: numgoroutine.go

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