singchia

const { NodeVM } = require('vm2');
const vm = new NodeVM({
    console: 'inherit',
    sandbox: { hello: hello },
    require: {
        external: false,
        builtin: ['fs', 'path'],
    }
});
var code = `

singchia

const { NodeVM } = require('vm2');
const vm = new NodeVM({
    console: 'inherit',
    sandbox: {},
    require: {
        external: false,
        builtin: ['fs', 'path'],
    }
});
var code = `

singchia

import fcntl
import os
import struct
import subprocess


# Some constants used to ioctl the device file. I got them by a simple C
# program.
TUNSETIFF = 0x400454ca
TUNSETOWNER = TUNSETIFF + 2

singchia

package main

import (
    "flag"
    "net"
    "os"
)

func main() {
    var addr string

singchia

package main

import (
	"flag"
	"net"
	"os"
	"time"

	"github.com/singchia/go-hammer/circulinker"
)

singchia

# Borrowed from: 
# https://github.com/silven/go-example/blob/master/Makefile
# https://vic.demuzere.be/articles/golang-makefile-crosscompile/

BINARY = superdo
VET_REPORT = vet.report
TEST_REPORT = tests.xml
GOARCH = amd64

VERSION?=?

singchia

package main

import (
	"flag"
	"fmt"
	"net"
	"os"
	"sync"
	"time"
)

singchia

// https://banu.com/blog/2/how-to-use-epoll-a-complete-example-in-c/
// http://www.kegel.com/poller/

/** Todo
 * - [ ] Split i/o and logic
 * - [ ] Unit test logic
 * - [ ] Logging
 * - [ ] Continuous integration
 *   - [ ] Linux
 *   - [ ] Windows

singchia

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)

singchia

package main

import (
    "fmt"
    "math/rand"
    "os"
    "strconv"
    "sync"
    "time"
)