Coring in Go

gocore.go

// Produces a core.
// Usage: GOTRACEBACK=crash ./example
// Check ulimit -c beforehand.
// Note the root signal is SEGV, however Go catches this, handles it and raises ABRT.
package main

import (
	"fmt"
	"sync/atomic"
	"unsafe"
)

type T struct {
	value int
}

func Swap(dest **T, old, new *T) bool {
	//udest := (*unsafe.Pointer)(unsafe.Pointer(dest))
	udest := (*unsafe.Pointer)(unsafe.Pointer(unsafe.Alignof(1)))
	return atomic.CompareAndSwapPointer(udest,
		unsafe.Pointer(old),
		unsafe.Pointer(new),
	)
}

func main() {
	x := &T{42}
	n := &T{50}
	fmt.Println(*x, *n)

	z := x
	Swap(&x, z, n)
	fmt.Println(*x, *n)
}

See also https://gist.github.com/lhuard1A/f88cce7487e84ff7a9e8