use alloc::string::{String, ToString};
use core::{fmt::Debug, marker::PhantomData};
use crate::{
bolts::tuples::MatchName,
corpus::{Corpus, CorpusId, SchedulerTestcaseMetaData},
executors::{Executor, HasObservers},
fuzzer::Evaluator,
mutators::Mutator,
observers::MapObserver,
schedulers::{
powersched::SchedulerMetadata, testcase_score::CorpusPowerTestcaseScore, TestcaseScore,
},
stages::{
mutational::{MutatedTransform, MutatedTransformPost},
MutationalStage, Stage,
},
state::{HasClientPerfMonitor, HasCorpus, HasMetadata, HasRand, UsesState},
Error,
};
#[derive(Clone, Debug)]
pub struct PowerMutationalStage<E, F, EM, I, M, O, Z> {
map_observer_name: String,
mutator: M,
#[allow(clippy::type_complexity)]
phantom: PhantomData<(E, F, EM, I, O, Z)>,
}
impl<E, F, EM, I, M, O, Z> UsesState for PowerMutationalStage<E, F, EM, I, M, O, Z>
where
E: UsesState,
{
type State = E::State;
}
impl<E, F, EM, I, M, O, Z> MutationalStage<E, EM, I, M, Z>
for PowerMutationalStage<E, F, EM, I, M, O, Z>
where
E: Executor<EM, Z> + HasObservers,
EM: UsesState<State = E::State>,
F: TestcaseScore<E::State>,
M: Mutator<I, E::State>,
O: MapObserver,
E::State: HasClientPerfMonitor + HasCorpus + HasMetadata + HasRand,
Z: Evaluator<E, EM, State = E::State>,
I: MutatedTransform<E::Input, E::State> + Clone,
{
#[inline]
fn mutator(&self) -> &M {
&self.mutator
}
#[inline]
fn mutator_mut(&mut self) -> &mut M {
&mut self.mutator
}
#[allow(clippy::cast_sign_loss)]
fn iterations(&self, state: &mut E::State, corpus_idx: CorpusId) -> Result<u64, Error> {
let mut testcase = state.corpus().get(corpus_idx)?.borrow_mut();
let score = F::compute(&mut *testcase, state)? as u64;
Ok(score)
}
#[allow(clippy::cast_possible_wrap)]
fn perform_mutational(
&mut self,
fuzzer: &mut Z,
executor: &mut E,
state: &mut E::State,
manager: &mut EM,
corpus_idx: CorpusId,
) -> Result<(), Error> {
let num = self.iterations(state, corpus_idx)?;
let testcase = state.corpus().get(corpus_idx)?.borrow();
let Ok(input) = I::try_transform_from(&testcase, state, corpus_idx) else { return Ok(()); };
drop(testcase);
for i in 0..num {
let mut input = input.clone();
self.mutator_mut().mutate(state, &mut input, i as i32)?;
let (untransformed, post) = input.try_transform_into(state)?;
let (_, corpus_idx) = fuzzer.evaluate_input(state, executor, manager, untransformed)?;
let observer = executor
.observers()
.match_name::<O>(&self.map_observer_name)
.ok_or_else(|| Error::key_not_found("MapObserver not found".to_string()))?;
let mut hash = observer.hash() as usize;
let psmeta = state
.metadata_mut()
.get_mut::<SchedulerMetadata>()
.ok_or_else(|| Error::key_not_found("SchedulerMetadata not found".to_string()))?;
hash %= psmeta.n_fuzz().len();
psmeta.n_fuzz_mut()[hash] = psmeta.n_fuzz()[hash].saturating_add(1);
if let Some(idx) = corpus_idx {
state
.corpus()
.get(idx)?
.borrow_mut()
.metadata_mut()
.get_mut::<SchedulerTestcaseMetaData>()
.ok_or_else(|| {
Error::key_not_found("SchedulerTestcaseMetaData not found".to_string())
})?
.set_n_fuzz_entry(hash);
}
self.mutator_mut().post_exec(state, i as i32, corpus_idx)?;
post.post_exec(state, i as i32, corpus_idx)?;
}
Ok(())
}
}
impl<E, F, EM, I, M, O, Z> Stage<E, EM, Z> for PowerMutationalStage<E, F, EM, I, M, O, Z>
where
E: Executor<EM, Z> + HasObservers,
EM: UsesState<State = E::State>,
F: TestcaseScore<E::State>,
M: Mutator<I, E::State>,
O: MapObserver,
E::State: HasClientPerfMonitor + HasCorpus + HasMetadata + HasRand,
Z: Evaluator<E, EM, State = E::State>,
I: MutatedTransform<E::Input, E::State> + Clone,
{
#[inline]
#[allow(clippy::let_and_return)]
fn perform(
&mut self,
fuzzer: &mut Z,
executor: &mut E,
state: &mut E::State,
manager: &mut EM,
corpus_idx: CorpusId,
) -> Result<(), Error> {
let ret = self.perform_mutational(fuzzer, executor, state, manager, corpus_idx);
ret
}
}
impl<E, F, EM, M, O, Z> PowerMutationalStage<E, F, EM, E::Input, M, O, Z>
where
E: Executor<EM, Z> + HasObservers,
EM: UsesState<State = E::State>,
F: TestcaseScore<E::State>,
M: Mutator<E::Input, E::State>,
O: MapObserver,
E::State: HasClientPerfMonitor + HasCorpus + HasMetadata + HasRand,
Z: Evaluator<E, EM, State = E::State>,
{
pub fn new(mutator: M, map_observer_name: &O) -> Self {
Self::transforming(mutator, map_observer_name)
}
}
impl<E, F, EM, I, M, O, Z> PowerMutationalStage<E, F, EM, I, M, O, Z>
where
E: Executor<EM, Z> + HasObservers,
EM: UsesState<State = E::State>,
F: TestcaseScore<E::State>,
M: Mutator<I, E::State>,
O: MapObserver,
E::State: HasClientPerfMonitor + HasCorpus + HasMetadata + HasRand,
Z: Evaluator<E, EM, State = E::State>,
{
pub fn transforming(mutator: M, map_observer_name: &O) -> Self {
Self {
map_observer_name: map_observer_name.name().to_string(),
mutator,
phantom: PhantomData,
}
}
}
pub type StdPowerMutationalStage<E, EM, I, M, O, Z> =
PowerMutationalStage<E, CorpusPowerTestcaseScore<<E as UsesState>::State>, EM, I, M, O, Z>;