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handle race condition

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(in remove_unused_shm_work_dirs)
This commit is contained in:
Sergej Schumilo 2022-01-21 20:26:47 +01:00
parent a5ae4c13e1
commit 2e45754e27
1 changed files with 26 additions and 11 deletions
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37
fuzz_runner/src/nyx/qemu_process.rs
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@ -491,19 +491,34 @@ impl QemuProcess {
path.push("lock");
if path.exists(){
let file_lock = OpenOptions::new()
let file_lock = match OpenOptions::new()
.read(true)
.open(&path)
.expect("couldn't open shm work dir lock file");
.open(&path){
Err(x) => {
println!("Warning: {}", x);
Err(x)
},
x => {
x
},
};
path.pop();
match file_lock.try_lock_exclusive(){
Ok(_) => {
if path.starts_with("/dev/shm/") {
fs::remove_dir_all(path).unwrap();
}
},
Err(_) => {},
if file_lock.is_ok(){
path.pop();
match file_lock.unwrap().try_lock_exclusive(){
Ok(_) => {
if path.starts_with("/dev/shm/") {
match fs::remove_dir_all(path){
Err(x) => {
println!("Warning: {}", x);
},
_ => {},
}
}
},
Err(_) => {},
}
}
}
}