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Make unique_std_input_file more unique (#3247)

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lazymio 2025-05-19 05:17:29 +08:00 committed by GitHub
parent 542b7f75b7
commit 73cc2f5b9c
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1 changed files with 8 additions and 1 deletions
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9
libafl_bolts/src/fs.rs
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@ -1,7 +1,10 @@
//! `LibAFL` functionality for filesystem interaction //! `LibAFL` functionality for filesystem interaction
use core::sync::atomic::AtomicU64;
use core::sync::atomic::Ordering;
#[cfg(unix)] #[cfg(unix)]
use std::os::unix::prelude::{AsRawFd, RawFd}; use std::os::unix::prelude::{AsRawFd, RawFd};
use std::sync::OnceLock;
use alloc::string::String; use alloc::string::String;
use alloc::sync::Arc; use alloc::sync::Arc;
@ -23,7 +26,11 @@ pub const INPUTFILE_STD: &str = ".cur_input";
/// Derives a filename from [`INPUTFILE_STD`] that may be used to deliver testcases to the target. /// Derives a filename from [`INPUTFILE_STD`] that may be used to deliver testcases to the target.
/// It ensures the filename is unique to the fuzzer process. /// It ensures the filename is unique to the fuzzer process.
pub fn get_unique_std_input_file() -> String { pub fn get_unique_std_input_file() -> String {
format!("{}_{}", INPUTFILE_STD, std::process::id()) static STD_COUNT: OnceLock<AtomicU64> = OnceLock::new();
let next = STD_COUNT
.get_or_init(|| AtomicU64::new(0))
.fetch_add(1, Ordering::SeqCst);
format!("{}_{}_{}", INPUTFILE_STD, std::process::id(), next)
} }
/// Write a file atomically /// Write a file atomically