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added warning for out of memory error aborts (addresses #32)

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Dominik Maier 2021-04-26 19:07:13 +02:00
parent 77867306f2
commit b8b01baf59
1 changed files with 10 additions and 3 deletions
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13
libafl/src/events/llmp.rs
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@ -585,18 +585,25 @@ where
// On Unix, we fork (todo: measure if that is actually faster.) // On Unix, we fork (todo: measure if that is actually faster.)
#[cfg(unix)] #[cfg(unix)]
let _ = match unsafe { fork() }? { let child_status = match unsafe { fork() }? {
ForkResult::Parent(handle) => handle.status(), ForkResult::Parent(handle) => handle.status(),
ForkResult::Child => break (sender, receiver, shmem_provider), ForkResult::Child => break (sender, receiver, shmem_provider),
}; };
// On windows, we spawn ourself again // On windows, we spawn ourself again
#[cfg(windows)] #[cfg(windows)]
startable_self()?.status()?; let child_status = startable_self()?.status()?;
if unsafe { read_volatile(&(*receiver.current_recv_map.page()).size_used) } == 0 { if unsafe { read_volatile(&(*receiver.current_recv_map.page()).size_used) } == 0 {
#[cfg(unix)]
if child_status == 137 {
// Out of Memory, see https://tldp.org/LDP/abs/html/exitcodes.html
// and https://github.com/AFLplusplus/LibAFL/issues/32 for discussion.
panic!("Fuzzer-respawner: The fuzzed target crashed with an out of memory error! Fix your harness, or switch to another executor (for example, a forkserver).");
}
// Storing state in the last round did not work // Storing state in the last round did not work
panic!("Fuzzer-respawner: Storing state in crashed fuzzer instance did not work, no point to spawn the next client!"); panic!("Fuzzer-respawner: Storing state in crashed fuzzer instance did not work, no point to spawn the next client! (Child exited with: {})", child_status);
} }
ctr = ctr.wrapping_add(1); ctr = ctr.wrapping_add(1);