https://github.com/octu0/unsafecgo

cgo calls via assembly trampoline
https://github.com/octu0/unsafecgo

assembly cgo goasm golang trampoline

Last synced: about 1 month ago
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cgo calls via assembly trampoline

• Host: GitHub
• URL: https://github.com/octu0/unsafecgo
• Owner: octu0
• License: mit
• Created: 2023-03-01T14:01:20.000Z (almost 2 years ago)
• Default Branch: master
• Last Pushed: 2023-03-23T11:25:59.000Z (almost 2 years ago)
• Last Synced: 2024-11-08T00:44:42.933Z (3 months ago)
• Topics: assembly, cgo, goasm, golang, trampoline
• Language: Go
• Homepage: https://pkg.go.dev/github.com/octu0/unsafecgo
• Size: 11.7 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# `unsafecgo`

[![MIT License](https://img.shields.io/github/license/octu0/unsafecgo)](https://github.com/octu0/unsafecgo/blob/master/LICENSE)

[![GoDoc](https://godoc.org/github.com/octu0/unsafecgo?status.svg)](https://godoc.org/github.com/octu0/unsafecgo)

[![Go Report Card](https://goreportcard.com/badge/github.com/octu0/unsafecgo)](https://goreportcard.com/report/github.com/octu0/unsafecgo)

[![Releases](https://img.shields.io/github/v/release/octu0/unsafecgo)](https://github.com/octu0/unsafecgo/releases)

`unsafecgo` provides Cgo calls via assembly trampoline. Inspired by [rustgo](https://blog.filippo.io/rustgo/).

## Installation

```bash

go get github.com/octu0/unsafecgo

```

## Example

```go

package main

/*

#include 

void hello() {

  fprintf(stderr, "hello world\n");

}

*/

import "C"

import (

	"fmt"

	"reflect"

	"runtime"

	"unsafe"

	"github.com/octu0/unsafecgo"

)

func cgo_helloworld() {

	fmt.Println("cgo")

	C.hello()

}

func unsafecgo_helloworld() {

	fmt.Println("unsafecgo.Call")

	p := unsafe.Pointer(reflect.ValueOf(C.hello).Pointer())

	unsafecgo.Call(p) // call C.hello()

	runtime.KeepAlive(p)

}

func main() {

	cgo_helloworld()

	unsafecgo_helloworld()

}

```

## Benchmark

```

goos: darwin

goarch: amd64

pkg: github.com/octu0/unsafecgo/benchmark

cpu: Intel(R) Core(TM) i5-8210Y CPU @ 1.60GHz

BenchmarkUnsafecgo

BenchmarkUnsafecgo/cgo/malloc_free

BenchmarkUnsafecgo/cgo/malloc_free-4              971646              1236 ns/op            1024 B/op          1 allocs/op

BenchmarkUnsafecgo/unsafecgo/malloc_free

BenchmarkUnsafecgo/unsafecgo/malloc_free-4       1340142               910.4 ns/op             0 B/op          0 allocs/op

BenchmarkUnsafecgo/cgo/calc

BenchmarkUnsafecgo/cgo/calc-4                    3667410               311.5 ns/op             0 B/op          0 allocs/op

BenchmarkUnsafecgo/unsafecgo/calc

BenchmarkUnsafecgo/unsafecgo/calc-4             16357767                74.31 ns/op            0 B/op          0 allocs/op

BenchmarkUnsafecgo/cgo/nop_call

BenchmarkUnsafecgo/cgo/nop_call-4               17337052                65.60 ns/op            0 B/op          0 allocs/op

BenchmarkUnsafecgo/unsafecgo/nop_call

BenchmarkUnsafecgo/unsafecgo/nop_call-4         369709251                3.211 ns/op           0 B/op          0 allocs/op

PASS

```

# License

MIT, see LICENSE file for details.