package main

/*
typedef struct {
    int x,y,z;
    int a,b,c,d,e,f,g,h,i,j,k;
    } S1;

typedef struct {
    int a,b,c;
    S1  x,y,z[30];
    } S2;

extern void cgoCallback(S1* s1,S2* s2,int cnt);
*/
import "C"

import (
    "log"
)

type S1 C.S1
type S2 C.S2

//export cgoCallback
func cgoCallback(s1 *S1, s2 *S2, cnt C.int) {
    cnt++

    log.Println("cgoCallback1:", int(cnt), s1, s2)

    if cnt < 500 {
        s1 := &S1{}
        s2 := &S2{}
        cgoCallback(s1, s2, cnt)
    }
}

func main() {
    log.Println(".")
}

#include <stdio.h>
#include <stdlib.h>
#include "libarmstack.h"

int main(int argc, char** argv) {
    S1 o1 = {0};
    S2 o2 = {0};
    S1* s1= &o1;
    S2* s2= &o2;

    cgoCallback(s1,s2,0);

    cgoCallback(s1,s2,0);   

    //cgoCallback(s1,s2,0); 
    return 0;
}

runtime: unexpected return pc for runtime.cgocallback_gofunc called from 0x0
fatal error: unknown caller pc

runtime stack:
runtime.throw(0xb6e97b9e, 0x11)
        D:/GoLang/goSource/go/src/runtime/panic.go:566 +0x80
runtime.gentraceback(0xb6e29ebc, 0x96dd43bc, 0x0, 0x96c143c0, 0x0, 0x0, 0x7fffffff, 0x868b5d04, 0x0, 0x0, ...)
        D:/GoLang/goSource/go/src/runtime/traceback.go:317 +0x1620
runtime.scanstack(0x96c143c0, 0x96c2292c)
        D:/GoLang/goSource/go/src/runtime/mgcmark.go:770 +0x344
runtime.scang(0x96c143c0, 0x96c2292c)
        D:/GoLang/goSource/go/src/runtime/proc.go:830 +0xb0
runtime.markroot.func1()
        D:/GoLang/goSource/go/src/runtime/mgcmark.go:234 +0xac
runtime.systemstack(0x96c22000)
        D:/GoLang/goSource/go/src/runtime/asm_arm.s:247 +0x8c
runtime.mstart()
        D:/GoLang/goSource/go/src/runtime/proc.go:1081