Add script to launch fuzzing continuosly

fuzz/cycle.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Continuosly cycle over fuzz targets running each for 1 hour.
+# It uses chrt SCHED_IDLE so that other process takes priority.
+#
+# For hfuzz options see https://github.com/google/honggfuzz/blob/master/docs/USAGE.md
+
+export HFUZZ_BUILD_ARGS='--features honggfuzz_fuzz'
+
+while :
+do
+  for FILE in fuzz_targets/*;
+  do
+    TARGET=$(echo $FILE | cut -c 14- | cut -f 1 -d '.')
+
+    # fuzz for one hour
+    HFUZZ_RUN_ARGS='--run_time 3600' chrt -i 0 cargo hfuzz run $TARGET
+
+    # minimize the corpus
+    HFUZZ_RUN_ARGS="-i hfuzz_workspace/$TARGET/input/ -P -M" chrt -i 0 cargo hfuzz run $TARGET
+  done
+done
+