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//! Defines WasmEdge ahead-of-time compiler.
use crate::{config::Config, WasmEdgeResult};
use std::path::{Path, PathBuf};
use wasmedge_sys as sys;
/// Defines WasmEdge ahead-of-time(AOT) compiler and the relevant APIs.
#[derive(Debug)]
pub struct Compiler {
pub(crate) inner: sys::Compiler,
}
impl Compiler {
/// Creates a new AOT compiler.
///
/// # Error
///
/// If fail to create a AOT compiler, then an error is returned.
pub fn new(config: Option<&Config>) -> WasmEdgeResult<Self> {
let inner = match config {
Some(cfg) => sys::Compiler::create(Some(&cfg.inner))?,
None => sys::Compiler::create(None)?,
};
Ok(Self { inner })
}
/// Compiles the given wasm file into a shared library file (*.so in Linux, *.dylib in macOS, or *.dll in Windows). The file path of the generated shared library file will be returned if the method works successfully.
///
/// # Arguments
///
/// * `wasm_file` - The target wasm file.
///
/// * `filename` - The filename of the generated shared library file.
///
/// * `out_dir` - The target directory to save the generated shared library file.
///
/// # Error
///
/// If fail to compile, then an error is returned.
pub fn compile_from_file(
&self,
wasm_file: impl AsRef<Path>,
filename: impl AsRef<str>,
out_dir: impl AsRef<Path>,
) -> WasmEdgeResult<PathBuf> {
#[cfg(target_os = "linux")]
let extension = "so";
#[cfg(target_os = "macos")]
let extension = "dylib";
#[cfg(target_os = "windows")]
let extension = "dll";
let aot_file = out_dir
.as_ref()
.join(format!("{}.{}", filename.as_ref(), extension));
self.inner.compile_from_file(wasm_file, &aot_file)?;
Ok(aot_file)
}
/// Compiles the given wasm bytes into a shared library file (*.so in Linux, *.dylib in macOS, or *.dll in Windows). The file path of the generated shared library file will be returned if the method works successfully.
///
/// # Argument
///
/// * `bytes` - A in-memory WASM bytes.
///
/// * `filename` - The filename of the generated shared library file.
///
/// * `out_dir` - The target directory to save the generated shared library file.
///
/// # Error
///
/// If fail to compile, then an error is returned.
pub fn compile_from_bytes(
&self,
bytes: impl AsRef<[u8]>,
filename: impl AsRef<str>,
out_dir: impl AsRef<Path>,
) -> WasmEdgeResult<PathBuf> {
#[cfg(target_os = "linux")]
let extension = "so";
#[cfg(target_os = "macos")]
let extension = "dylib";
#[cfg(target_os = "windows")]
let extension = "dll";
let aot_file = out_dir
.as_ref()
.join(format!("{}.{}", filename.as_ref(), extension));
self.inner.compile_from_bytes(bytes, &aot_file)?;
Ok(aot_file)
}
}
#[cfg(not(feature = "async"))]
#[cfg(test)]
mod tests {
use super::*;
use crate::{
config::{CompilerConfigOptions, ConfigBuilder},
params, wat2wasm, CompilerOutputFormat, VmBuilder, WasmVal,
};
use std::io::Read;
#[test]
fn test_compiler_compile_from_file() -> Result<(), Box<dyn std::error::Error>> {
// compile from file
{
let config = ConfigBuilder::default()
.with_compiler_config(
CompilerConfigOptions::new().out_format(CompilerOutputFormat::Native),
)
.build()?;
let compiler = Compiler::new(Some(&config))?;
let wasm_file = std::env::current_dir()
.unwrap()
.join("examples/wasmedge-sys/data/fibonacci.wat");
let out_dir = std::env::current_dir()?;
let aot_filename = "aot_fibonacci_1";
let aot_file_path = compiler.compile_from_file(wasm_file, aot_filename, out_dir)?;
assert!(aot_file_path.exists());
#[cfg(target_os = "macos")]
assert!(aot_file_path.ends_with("aot_fibonacci_1.dylib"));
#[cfg(target_os = "linux")]
assert!(aot_file_path.ends_with("aot_fibonacci_1.so"));
#[cfg(target_os = "windows")]
assert!(aot_file_path.ends_with("aot_fibonacci_1.dll"));
// read buffer
let mut aot_file = std::fs::File::open(&aot_file_path)?;
let mut buffer = [0u8; 4];
aot_file.read_exact(&mut buffer)?;
let wasm_magic: [u8; 4] = [0x00, 0x61, 0x73, 0x6D];
assert_ne!(buffer, wasm_magic);
let res =
VmBuilder::new()
.build()?
.run_func_from_file(&aot_file_path, "fib", params!(5))?;
assert_eq!(res[0].to_i32(), 8);
// cleanup
assert!(std::fs::remove_file(aot_file_path).is_ok());
}
// compile from bytes
{
let wasm_bytes = wat2wasm(
br#"(module
(export "fib" (func $fib))
(func $fib (param $n i32) (result i32)
(if
(i32.lt_s
(local.get $n)
(i32.const 2)
)
(then
(return (i32.const 1))
)
)
(return
(i32.add
(call $fib
(i32.sub
(local.get $n)
(i32.const 2)
)
)
(call $fib
(i32.sub
(local.get $n)
(i32.const 1)
)
)
)
)
)
)
"#,
)?;
// create a aot compiler
let config = ConfigBuilder::default()
.with_compiler_config(
CompilerConfigOptions::new().out_format(CompilerOutputFormat::Native),
)
.build()?;
let compiler = Compiler::new(Some(&config))?;
// compile wasm bytes into a shared library file
let out_dir = std::env::current_dir()?;
let aot_filename = "aot_fibonacci_2";
let aot_file_path = compiler.compile_from_bytes(wasm_bytes, aot_filename, out_dir)?;
assert!(aot_file_path.exists());
#[cfg(target_os = "macos")]
assert!(aot_file_path.ends_with("aot_fibonacci_2.dylib"));
#[cfg(target_os = "linux")]
assert!(aot_file_path.ends_with("aot_fibonacci_2.so"));
#[cfg(target_os = "windows")]
assert!(aot_file_path.ends_with("aot_fibonacci_2.dll"));
// read buffer
let mut aot_file = std::fs::File::open(&aot_file_path)?;
let mut buffer = [0u8; 4];
aot_file.read_exact(&mut buffer)?;
let wasm_magic: [u8; 4] = [0x00, 0x61, 0x73, 0x6D];
assert_ne!(buffer, wasm_magic);
let res =
VmBuilder::new()
.build()?
.run_func_from_file(&aot_file_path, "fib", params!(5))?;
assert_eq!(res[0].to_i32(), 8);
// cleanup
assert!(std::fs::remove_file(aot_file_path).is_ok());
}
Ok(())
}
}