libafl 0.5.0

Slot your own fuzzers together and extend their features using Rust
Documentation 
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//! A `TimeoutExecutor` sets a timeout before each target run

use core::time::Duration;

use crate::{
    executors::{Executor, ExitKind, HasObservers},
    inputs::Input,
    observers::ObserversTuple,
    Error,
};

#[cfg(unix)]
use core::ptr::null_mut;
#[cfg(unix)]
use libc::c_int;

#[repr(C)]
#[cfg(unix)]
struct Timeval {
    pub tv_sec: i64,
    pub tv_usec: i64,
}

#[repr(C)]
#[cfg(unix)]
struct Itimerval {
    pub it_interval: Timeval,
    pub it_value: Timeval,
}

#[cfg(unix)]
extern "C" {
    fn setitimer(which: c_int, new_value: *mut Itimerval, old_value: *mut Itimerval) -> c_int;
}

#[cfg(unix)]
const ITIMER_REAL: c_int = 0;

/// The timeout excutor is a wrapper that sets a timeout before each run
pub struct TimeoutExecutor<E> {
    executor: E,
    #[cfg(unix)]
    itimerval: Itimerval,
    #[cfg(unix)]
    itimerval_zero: Itimerval,
}

impl<E> TimeoutExecutor<E> {
    /// Create a new `TimeoutExecutor`, wrapping the given `executor` and checking for timeouts.
    /// This should usually be used for `InProcess` fuzzing.
    #[cfg(unix)]
    pub fn new(executor: E, exec_tmout: Duration) -> Self {
        let milli_sec = exec_tmout.as_millis();
        let it_value_some = Timeval {
            tv_sec: (milli_sec / 1000) as i64,
            tv_usec: (milli_sec % 1000) as i64,
        };
        let it_value_zero = Timeval {
            tv_sec: 0,
            tv_usec: 0,
        };
        let it_interval_some = Timeval {
            tv_sec: 0,
            tv_usec: 0,
        };
        let it_interval_zero = Timeval {
            tv_sec: 0,
            tv_usec: 0,
        };
        let itimerval = Itimerval {
            it_value: it_value_some,
            it_interval: it_interval_some,
        };
        let itimerval_zero = Itimerval {
            it_value: it_value_zero,
            it_interval: it_interval_zero,
        };
        Self {
            executor,
            itimerval,
            itimerval_zero,
        }
    }

    #[cfg(windows)]
    pub fn new(executor: E, exec_tmout: Duration) -> Self {
        Self { executor }
    }

    /// Retrieve the inner `Executor` that is wrapped by this `TimeoutExecutor`.
    pub fn inner(&mut self) -> &mut E {
        &mut self.executor
    }
}

impl<E, EM, I, S, Z> Executor<EM, I, S, Z> for TimeoutExecutor<E>
where
    E: Executor<EM, I, S, Z>,
    I: Input,
{
    fn run_target(
        &mut self,
        fuzzer: &mut Z,
        state: &mut S,
        mgr: &mut EM,
        input: &I,
    ) -> Result<ExitKind, Error> {
        #[cfg(unix)]
        unsafe {
            setitimer(ITIMER_REAL, &mut self.itimerval, null_mut());
        }
        #[cfg(windows)]
        {
            // TODO
        }

        let ret = self.executor.run_target(fuzzer, state, mgr, input);

        #[cfg(unix)]
        unsafe {
            setitimer(ITIMER_REAL, &mut self.itimerval_zero, null_mut());
        }
        #[cfg(windows)]
        {
            // TODO
        }

        ret
    }
}

impl<E, I, OT, S> HasObservers<I, OT, S> for TimeoutExecutor<E>
where
    E: HasObservers<I, OT, S>,
    OT: ObserversTuple<I, S>,
{
    #[inline]
    fn observers(&self) -> &OT {
        self.executor.observers()
    }

    #[inline]
    fn observers_mut(&mut self) -> &mut OT {
        self.executor.observers_mut()
    }
}