add AFL_NO_STARTUP_CALIBRATION feature

src/afl-fuzz-init.c

@@ -850,6 +850,30 @@ void read_testcases(afl_state_t *afl, u8 *directory) {
 
 }
 
+/* In case no initial calibration is to be performed (e.g. huge queue and slow
+execution time), then setting AFL_NO_STARTUP_CALIBRATION will help getting
+initial data. For this to succeed, non-calibrated corpus entries have to look
+especially juicy so they are more likely to be selected then a calibrated good
+looking one. */
+
+void no_dry_run(afl_state_t *afl) {
+
+  struct queue_entry *q;
+  u32                 idx;
+
+  for (idx = 0; idx < afl->queued_items; idx++) {
+
+    q = afl->queue_buf[idx];
+    if (unlikely(!q || q->disabled)) { continue; }
+
+    q->exec_us = 1;
+    q->bitmap_size = MAP_SIZE;
+    q->tc_ref = MAP_SIZE;
+
+  }
+
+}
+
 /* Perform dry run of all test cases to confirm that the app is working as
    expected. This is done only for the initial inputs, and only once. */