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vanhauser-thc 2024-06-28 16:47:20 +02:00
parent d869913efa
commit 3f065ea70a
1 changed files with 56 additions and 47 deletions
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103
src/afl-fuzz-queue.c
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@ -65,58 +65,67 @@ double compute_weight(afl_state_t *afl, struct queue_entry *q,
double avg_exec_us, double avg_bitmap_size, double avg_exec_us, double avg_bitmap_size,
double avg_top_size, double avg_score) { double avg_top_size, double avg_score) {
double weight = 1.0; if (unlikely(afl->fuzz_mode && avg_score > 0)) {
if (likely(afl->schedule >= FAST && afl->schedule <= RARE)) { return q->score / avg_score;
u32 hits = afl->n_fuzz[q->n_fuzz_entry]; } else {
if (likely(hits)) { weight /= (log10(hits) + 1); }
double weight = 1.0;
if (likely(afl->schedule >= FAST && afl->schedule <= RARE)) {
u32 hits = afl->n_fuzz[q->n_fuzz_entry];
if (likely(hits)) { weight /= (log10(hits) + 1); }
}
#ifdef DEBUG_QUEUE
fprintf(stderr, "WEIGHT id=%u fname=%s start_weight=1.0\n", q->id,
q->fname);
fprintf(stderr, " after step 1: %.2f (log10(hits))\n", weight);
#endif
if (likely(afl->schedule < RARE)) { weight *= (avg_exec_us / q->exec_us); }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 2: %.2f (exec_us)\n", weight);
#endif
weight *= (log(q->bitmap_size) / avg_bitmap_size);
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 3: %.2f (log(bitmap_size))\n", weight);
#endif
weight *= (1 + (q->tc_ref / avg_top_size));
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 4: %.2f (top_size)\n", weight);
#endif
if (unlikely(avg_score != 0.0)) { weight *= (q->score / avg_score); }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 5: %.2f (score)\n", weight);
#endif
if (unlikely(weight < 0.1)) { weight = 0.1; }
if (unlikely(q->favored)) {
weight += 1;
weight *= 5;
}
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 6: %.2f (favored)\n", weight);
#endif
if (unlikely(!q->was_fuzzed)) { weight *= 2.5; }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 7: %.2f (was_fuzzed)\n", weight);
#endif
if (unlikely(q->fs_redundant)) { weight *= 0.75; }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after final step: %.2f (fs_redundant)\n", weight);
#endif
return weight;
} }
#ifdef DEBUG_QUEUE
fprintf(stderr, "WEIGHT id=%u fname=%s start_weight=1.0\n", q->id, q->fname);
fprintf(stderr, " after step 1: %.2f (log10(hits))\n", weight);
#endif
if (likely(afl->schedule < RARE)) { weight *= (avg_exec_us / q->exec_us); }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 2: %.2f (exec_us)\n", weight);
#endif
weight *= (log(q->bitmap_size) / avg_bitmap_size);
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 3: %.2f (log(bitmap_size))\n", weight);
#endif
weight *= (1 + (q->tc_ref / avg_top_size));
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 4: %.2f (top_size)\n", weight);
#endif
if (unlikely(avg_score != 0.0)) { weight *= (q->score / avg_score); }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 5: %.2f (score)\n", weight);
#endif
if (unlikely(weight < 0.1)) { weight = 0.1; }
if (unlikely(q->favored)) {
weight += 1;
weight *= 5;
}
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 6: %.2f (favored)\n", weight);
#endif
if (unlikely(!q->was_fuzzed)) { weight *= 2.5; }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after step 7: %.2f (was_fuzzed)\n", weight);
#endif
if (unlikely(q->fs_redundant)) { weight *= 0.75; }
#ifdef DEBUG_QUEUE
fprintf(stderr, " after final step: %.2f (fs_redundant)\n", weight);
#endif
return weight;
} }
/* create the alias table that allows weighted random selection - expensive */ /* create the alias table that allows weighted random selection - expensive */