reverse read the queue n resumes

docs/Changelog.md

@@ -16,6 +16,7 @@ sending a mail to <afl-users+subscribe@googlegroups.com>.
     - if the target becomes unavailable check out out/default/error.txt
       for an indicator why
     - AFL_CAL_FAST was a dead env, now does the same as AFL_FAST_CAL
+    - reverse read the queue on resumes (more effective)
   - afl-cc:
     - Update to COMPCOV/laf-intel that speeds up the instrumentation
       process a lot - thanks to Michael Rodler/f0rki for the PR!

src/afl-fuzz-init.c

@@ -710,7 +710,10 @@ void read_testcases(afl_state_t *afl, u8 *directory) {
 
   }
 
-  for (i = 0; i < (u32)nl_cnt; ++i) {
+  i = nl_cnt;
+  do {
+
+    --i;
 
     struct stat st;
 
@@ -801,7 +804,7 @@ void read_testcases(afl_state_t *afl, u8 *directory) {
 
     */
 
-  }
+  } while (i > 0);
 
   free(nl);                                                  /* not tracked */
 

src/afl-fuzz-run.c

@@ -424,7 +424,8 @@ u8 calibrate_case(afl_state_t *afl, struct queue_entry *q, u8 *use_mem,
         }
 
         var_detected = 1;
-        afl->stage_max = afl->afl_env.afl_cal_fast ? CAL_CYCLES : CAL_CYCLES_LONG;
+        afl->stage_max =
+            afl->afl_env.afl_cal_fast ? CAL_CYCLES : CAL_CYCLES_LONG;
 
       } else {
 

src/afl-fuzz.c

@@ -1911,7 +1911,12 @@ int main(int argc, char **argv_orig, char **envp) {
   if (unlikely(afl->old_seed_selection)) seek_to = find_start_position(afl);
 
   afl->start_time = get_cur_time();
-  if (afl->in_place_resume || afl->afl_env.afl_autoresume) load_stats_file(afl);
+  if (afl->in_place_resume || afl->afl_env.afl_autoresume) {
+
+    load_stats_file(afl);
+
+  }
+
   write_stats_file(afl, 0, 0, 0, 0);
   maybe_update_plot_file(afl, 0, 0, 0);
   save_auto(afl);