Generate random seed for fuzzer experiments.

Author: elliottslaughter

experiment/sapling/run_all_tests.sh

@@ -32,7 +32,10 @@ function run_fuzzer_config {
         exit 1
     fi
 
-    FUZZER_EXE="$fuzzer_exe" FUZZER_MODE=$mode FUZZER_TEST_COUNT=$test_count FUZZER_LAUNCHER="$launcher" sbatch --nodes 1 "experiment/$FUZZER_MACHINE/sbatch_fuzzer.sh"
+    # Generate a random seed so we explore a novel part of the state space.
+    seed="$(( 16#$(openssl rand -hex 4) * test_count ))"
+
+    FUZZER_EXE="$fuzzer_exe" FUZZER_MODE=$mode FUZZER_TEST_COUNT=$test_count FUZZER_SEED=$seed FUZZER_LAUNCHER="$launcher" sbatch --nodes 1 "experiment/$FUZZER_MACHINE/sbatch_fuzzer.sh"
 }
 
 run_fuzzer_config debug_single single

experiment/sapling/sbatch_fuzzer.sh

@@ -18,6 +18,7 @@ fuzzer_flags=(
     -j${FUZZER_THREADS:-4}
     -n${FUZZER_TEST_COUNT:-1000}
     -o${FUZZER_OP_COUNT:-1000}
+    -s${FUZZER_SEED:-0}
     --extra="$FUZZER_EXTRA_FLAGS"
 )