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use core::slice;
use gentoo_utils::{Parseable, atom::Atom};
use mon::{Parser, ParserFinishedError, input::InputIter};
use std::{
io::{BufRead, BufReader, Write},
process::{ChildStdin, ChildStdout, Command, Stdio},
sync::{LazyLock, Mutex},
};
struct PyProcess {
stdin: Mutex<ChildStdin>,
stdout: Mutex<BufReader<ChildStdout>>,
buffer: Mutex<String>,
}
#[allow(clippy::missing_safety_doc, clippy::needless_return)]
#[unsafe(no_mangle)]
pub unsafe extern "C" fn LLVMFuzzerTestOneInput(input: *const u8, len: usize) -> i32 {
static PY_PROCESS: LazyLock<PyProcess> = LazyLock::new(|| {
#[allow(clippy::zombie_processes)]
let mut proc = Command::new("atom.py")
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.stderr(Stdio::inherit())
.spawn()
.expect("failed to spawn atom.py");
let stdin = Mutex::new(proc.stdin.take().unwrap());
let stdout = Mutex::new(BufReader::new(proc.stdout.take().unwrap()));
PyProcess {
stdin,
stdout,
buffer: Mutex::new(String::new()),
}
});
let slice = unsafe { slice::from_raw_parts(input, len) };
if slice.iter().any(|b| !b.is_ascii_graphic()) {
return -1;
}
let str = match str::from_utf8(slice) {
Ok(str) => str,
Err(_) => return -1,
};
let atom = str.trim();
let mut stdin = PY_PROCESS.stdin.lock().expect("failed to get stdin lock");
writeln!(&mut stdin, "{atom}").expect("failed to write to python stdin");
let mut stdout = PY_PROCESS.stdout.lock().expect("failed to get stdout lock");
let mut buffer = PY_PROCESS.buffer.lock().expect("failed to get buffer lock");
buffer.clear();
stdout
.read_line(&mut buffer)
.expect("failed to readline from python");
let portage_result = match buffer.as_str().trim() {
"0" => true,
"1" => false,
result => panic!("got unexpected result from python: {result}"),
};
let gentoo_utils_result = Atom::parser().parse_finished(InputIter::new(atom));
match (portage_result, gentoo_utils_result) {
(true, Ok(_)) => {
eprintln!("agreement that {atom} is valid");
}
(false, Err(_)) => {
eprintln!("agreement that {atom} is invalid");
}
(true, Err(_)) => {
panic!("rejected valid atom: {atom}");
}
(false, Ok(atom))
if atom.usedeps().iter().any(|usedep| {
atom.usedeps()
.iter()
.filter(|u| usedep.flag() == u.flag())
.count()
> 1
}) =>
{
eprintln!("disagreement due to duplicates in usedeps");
}
(false, Ok(_)) => {
panic!("accpeted invalid atom: {atom}")
}
}
return 0;
}
|
