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change interrupt randomization rule

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This commit is contained in:
Alwin Berger 2024-08-26 15:46:11 +02:00
parent ae6b3c0650
commit 11028d7aae
1 changed files with 3 additions and 8 deletions
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11
fuzzers/FRET/src/systemstate/mutational.rs
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@ -171,21 +171,16 @@ where
let hist = metadata.get::<IcHist>().unwrap(); let hist = metadata.get::<IcHist>().unwrap();
let maxtick : u64 = hist.1.0; let maxtick : u64 = hist.1.0;
drop(hist); drop(hist);
if interrupt_offsets[0] as u64 > maxtick { // place interrupt in reachable range {
do_rerun = true;
for _ in 0..num_interrupts {
prefix.push(u32::to_le_bytes(myrand.between(0, min(maxtick as usize, u32::MAX as usize)).try_into().expect("ticks > u32")));
}
} else {
let choice = myrand.between(1,100); let choice = myrand.between(1,100);
if choice <= 25 { // 0.5*0.25 = 12.5% of the time fully randomize all interrupts if choice <= 25 || *interrupt_offsets.get(0).unwrap_or(&u32::MAX) as u64 > maxtick { // 0.5*0.25 = 12.5% of the time fully randomize all interrupts
do_rerun = true; do_rerun = true;
// let metadata = state.metadata_map(); // let metadata = state.metadata_map();
let hist = metadata.get::<IcHist>().unwrap(); let hist = metadata.get::<IcHist>().unwrap();
let maxtick : u64 = hist.1.0; let maxtick : u64 = hist.1.0;
// let maxtick : u64 = (_input.exec_time().expect("No duration found").as_nanos() >> 4).try_into().unwrap(); // let maxtick : u64 = (_input.exec_time().expect("No duration found").as_nanos() >> 4).try_into().unwrap();
let mut numbers : Vec<u32> = vec![]; let mut numbers : Vec<u32> = vec![];
for i in 0..num_interrupts { for i in 0..myrand.between(0,2*min(MAX_NUM_INTERRUPT, maxtick as usize / unsafe{MINIMUM_INTER_ARRIVAL_TIME as usize})) {
prefix.push(u32::to_le_bytes(myrand.between(0, min(maxtick, u32::MAX as u64) as usize).try_into().expect("ticks > u32"))); prefix.push(u32::to_le_bytes(myrand.between(0, min(maxtick, u32::MAX as u64) as usize).try_into().expect("ticks > u32")));
} }
} }