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/* Copyright 2021 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
extern crate arbitrary;
extern crate wasm_smith;
use arbitrary::{Arbitrary, Unstructured};
use wasm_smith::{Config, Module};
use std::ptr;
// A custom configuration to enable all experimental features that we have
// some support for.
#[derive(Arbitrary, Debug)]
struct SpiderMonkeyConfig;
impl Config for SpiderMonkeyConfig {
fn bulk_memory_enabled(&self) -> bool {
true
}
fn reference_types_enabled(&self) -> bool {
true
}
fn exceptions_enabled(&self) -> bool {
true
}
fn memory64_enabled(&self) -> bool {
true
}
fn simd_enabled(&self) -> bool {
true
}
}
#[no_mangle]
pub unsafe extern "C" fn gluesmith(
data: *mut u8,
len: usize,
out: *mut u8,
maxlen: usize,
) -> usize {
let buf: &[u8] = std::slice::from_raw_parts(data, len);
let mut u = Unstructured::new(buf);
let module = match Module::new(SpiderMonkeyConfig {}, &mut u) {
Ok(m) => m,
Err(_e) => return 0,
};
let wasm_bytes = module.to_bytes();
let src_len = wasm_bytes.len();
if src_len > maxlen {
return 0;
}
let src_ptr = wasm_bytes.as_ptr();
ptr::copy_nonoverlapping(src_ptr, out, src_len);
return src_len;
}
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