feat: call rust ffi from go
This commit is contained in:
6
.gitignore
vendored
6
.gitignore
vendored
@@ -1,13 +1,10 @@
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.idea/
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# ---> Rust
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# Generated by Cargo
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# will have compiled files and executables
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debug/
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target/
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# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
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# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
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Cargo.lock
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# These are backup files generated by rustfmt
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**/*.rs.bk
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@@ -23,6 +20,7 @@ Cargo.lock
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Icon
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440
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Normal file
440
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|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
|
||||
13
Cargo.toml
Normal file
13
Cargo.toml
Normal file
@@ -0,0 +1,13 @@
|
||||
[package]
|
||||
name = "rust-ffi-from-go"
|
||||
version = "0.0.1"
|
||||
edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
libc = "0.2.151"
|
||||
|
||||
[lib]
|
||||
crate_type = ["cdylib"]
|
||||
|
||||
[build-dependencies]
|
||||
cbindgen = "0.26.0"
|
||||
12
README.md
12
README.md
@@ -1,3 +1,15 @@
|
||||
# rust-ffi-from-go
|
||||
|
||||
Calling Rust FFI libraries from Go
|
||||
|
||||
> Rust is an excellent systems language so it makes a lot of sense to be able to use Rust libraries in other languages. Rust supports a Foreign Function Interface (FFI) so you can call into other C libraries as well as allow C to call into Rust libraries.
|
||||
>
|
||||
> Go has something similar with cgo, but we really don’t want to do anything with C directly. Memory safety is important, particularly for a security company! This means the ideal route is to write in Rust, but compile to a format that Go can interface with. That’s what FFI is for.
|
||||
>
|
||||
> https://blog.arcjet.com/calling-rust-ffi-libraries-from-go/
|
||||
|
||||
# Installation
|
||||
|
||||
```shell
|
||||
cargo install cargo-zigbuild
|
||||
```
|
||||
|
||||
33
build.rs
Normal file
33
build.rs
Normal file
@@ -0,0 +1,33 @@
|
||||
// Adapted from https://michael-f-bryan.github.io/rust-ffi-guide/cbindgen.html
|
||||
extern crate cbindgen;
|
||||
|
||||
use std::env;
|
||||
use std::path::PathBuf;
|
||||
|
||||
fn main() {
|
||||
let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
|
||||
|
||||
let package_name = env::var("CARGO_PKG_NAME").unwrap();
|
||||
let output_file = target_dir()
|
||||
.join(format!("{}.h", package_name))
|
||||
.display()
|
||||
.to_string();
|
||||
|
||||
cbindgen::Builder::new()
|
||||
.with_crate(crate_dir)
|
||||
.with_language(cbindgen::Language::C)
|
||||
.generate()
|
||||
.unwrap()
|
||||
.write_to_file(&output_file);
|
||||
}
|
||||
|
||||
/// Find the location of the `target/` directory. Note that this may be
|
||||
/// overridden by `cmake`, so we also need to check the `CARGO_TARGET_DIR`
|
||||
/// variable.
|
||||
fn target_dir() -> PathBuf {
|
||||
if let Ok(target) = env::var("CARGO_TARGET_DIR") {
|
||||
PathBuf::from(target)
|
||||
} else {
|
||||
PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join("target")
|
||||
}
|
||||
}
|
||||
29
call-from-go.go
Normal file
29
call-from-go.go
Normal file
@@ -0,0 +1,29 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/ebitengine/purego"
|
||||
)
|
||||
|
||||
func main() {
|
||||
libPath := "target/debug/librust_ffi_from_go.dylib"
|
||||
|
||||
arcjetlib, err := purego.Dlopen(libPath, purego.RTLD_NOW|purego.RTLD_GLOBAL)
|
||||
|
||||
if err != nil {
|
||||
// Handle error
|
||||
panic("load dylib error")
|
||||
}
|
||||
|
||||
defer purego.Dlclose(arcjetlib)
|
||||
|
||||
// Register the function
|
||||
var launch func(string) string
|
||||
purego.RegisterLibFunc(&launch, arcjetlib, "arcjet_launch")
|
||||
|
||||
result := launch("hatter")
|
||||
|
||||
fmt.Println("result: ", result)
|
||||
}
|
||||
|
||||
5
go.mod
Normal file
5
go.mod
Normal file
@@ -0,0 +1,5 @@
|
||||
module main
|
||||
|
||||
go 1.23.0
|
||||
|
||||
require github.com/ebitengine/purego v0.8.2 // indirect
|
||||
2
go.sum
Normal file
2
go.sum
Normal file
@@ -0,0 +1,2 @@
|
||||
github.com/ebitengine/purego v0.8.2 h1:jPPGWs2sZ1UgOSgD2bClL0MJIqu58nOmIcBuXr62z1I=
|
||||
github.com/ebitengine/purego v0.8.2/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
|
||||
14
justfile
Normal file
14
justfile
Normal file
@@ -0,0 +1,14 @@
|
||||
_:
|
||||
@just --list
|
||||
|
||||
build-linux-x86:
|
||||
#rustup target add x86_64-unknown-linux-gnu
|
||||
cargo zigbuild --release --target=x86_64-unknown-linux-gnu
|
||||
|
||||
build-linux-arm:
|
||||
#rustup target add aarch64-unknown-linux-gnu
|
||||
cargo zigbuild --release --target=aarch64-unknown-linux-gnu
|
||||
|
||||
build-macos-arm:
|
||||
#rustup target add aarch64-apple-darwin
|
||||
cargo zigbuild --target=aarch64-apple-darwin
|
||||
24
src/lib.rs
Normal file
24
src/lib.rs
Normal file
@@ -0,0 +1,24 @@
|
||||
use std::ffi::CStr;
|
||||
|
||||
#[no_mangle]
|
||||
pub unsafe extern "C" fn arcjet_launch(input: *const libc::c_char) -> *const libc::c_char {
|
||||
// Convert the input from a C string to a Rust string
|
||||
let input_cstr = unsafe { CStr::from_ptr(input) };
|
||||
let input = input_cstr.to_str().unwrap().to_string();
|
||||
|
||||
// You should do some validation here
|
||||
|
||||
// Call the Rust function
|
||||
let output = format!("Hello {input}");
|
||||
|
||||
// Convert the output from a Rust string to a C string
|
||||
let output_cstr = match std::ffi::CString::new(output) {
|
||||
Ok(cstring) => cstring,
|
||||
Err(e) => {
|
||||
println!("({})", e);
|
||||
return ::std::ptr::null();
|
||||
}
|
||||
};
|
||||
|
||||
output_cstr.into_raw()
|
||||
}
|
||||
Reference in New Issue
Block a user