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[WIP] Assign probability for random params per seed #9

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Merged
jiradeto merged 3 commits into from
Aug 12, 2021
Merged

[WIP] Assign probability for random params per seed #9

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43c7877
assign random params prob per seed
jiradeto Aug 6, 2021
cfdd58c
include math.h
jiradeto Aug 7, 2021
881d74b
avoid using math
jiradeto Aug 7, 2021
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18 changes: 11 additions & 7 deletions afl-fuzz.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5268,6 +5268,17 @@ static u8 fuzz_one(char** argv) {
fflush(stdout);
}

// assign probability based on frequncy that the seed was chosen
if (!disable_randomized_fuzzing_params) {
// randomize fuzzing params with probabilities
int multiplier = queue_cur->num_fuzzed ? ((int)(queue_cur->num_fuzzed/5000.0)) + 1: 0;
randomize_parameters_prob = MIN(MAX(multiplier * 5, 5), 75);
if (UR(100) < randomize_parameters_prob)
randomize_fuzzing_params();
else
reset_fuzzing_params();
}

/* Map the test case into memory. */

fd = open(queue_cur->fname, O_RDONLY);
Expand Down Expand Up @@ -8332,13 +8343,6 @@ int main(int argc, char** argv) {
if (!disable_weighted_random_selection)
mark_selected_inputs();

if (!disable_randomized_fuzzing_params) {
// randomize fuzzing params with probabilities
if (UR(100) < randomize_parameters_prob)
randomize_fuzzing_params();
else
reset_fuzzing_params();
}

show_stats();

Expand Down