wasmi/fuzz/fuzz_targets/load_spec.rs

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Rust
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#![no_main]
#[macro_use]
extern crate libfuzzer_sys;
extern crate wabt;
extern crate wasmi;
extern crate tempdir;
use std::fs::File;
use std::io::Write;
use std::process::{Command, Stdio};
fn run_spec(data: &[u8]) -> Result<(), ()> {
let temp_dir = tempdir::TempDir::new("spec").unwrap();
let mut seed_path = temp_dir.path().to_path_buf();
seed_path.push("test.wasm");
{
let mut seedfile =
File::create(&seed_path).expect("open temporary file for writing to store fuzzer input");
seedfile.write_all(data).expect(
"write fuzzer input to temporary file",
);
seedfile.flush().expect(
"flush fuzzer input to temporary file before starting wasm-opt",
);
}
let exit_status = Command::new("wasm")
.arg("-d")
.arg(&seed_path)
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()
.expect("failed to execute `wasm`");
if exit_status.success() {
Ok(())
} else {
Err(())
}
}
fn run_wasmi(data: &[u8]) -> Result<(), ()> {
let _ = wasmi::Module::from_buffer(data).map_err(|_| ())?;
Ok(())
}
fuzz_target!(|data: &[u8]| {
let wasmi_result = run_wasmi(data);
let wasm_result = run_spec(data);
assert_eq!(wasmi_result.is_ok(), wasm_result.is_ok());
});