Add debug output to alert user to calibration progress/issues
MODIFY
src/afl-fuzz-run.c
src/afl-fuzz-run.c
@@ -355,6 +355,8 @@ u8 calibrate_case(afl_state_t *afl, struct queue_entry *q, u8 *use_mem,
for (afl->stage_cur = 0; afl->stage_cur < afl->stage_max; ++afl->stage_cur) {
+ if (unlikely(afl->debug)) { DEBUGF("calibration stage %d/%d\n", afl->stage_cur+1, afl->stage_max); }
+
u64 cksum;
write_to_testcase(afl, use_mem, q->len);
@@ -402,6 +404,15 @@ u8 calibrate_case(afl_state_t *afl, struct queue_entry *q, u8 *use_mem,
}
+ if (unlikely(!var_detected)) {
+ // note: from_queue seems to only be set during initialization
+ if (afl->afl_env.afl_no_ui || from_queue) {
+ WARNF("instability detected during calibration\n");
+ } else if (afl->debug) {
+ DEBUGF("instability detected during calibration\n");
+ }
+ }
+
var_detected = 1;
afl->stage_max =
afl->afl_env.afl_cal_fast ? CAL_CYCLES : CAL_CYCLES_LONG;

Add debug output to alert user to calibration progress/issues (#969)