1 files changed, 81 insertions, 0 deletions
diff --git a/contrib/bc/scripts/fuzz_prep.sh b/contrib/bc/scripts/fuzz_prep.sh
new file mode 100755
index 000000000000..0441f94e340c
--- /dev/null
+++ b/contrib/bc/scripts/fuzz_prep.sh
@@ -0,0 +1,81 @@
+#! /bin/sh
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (c) 2018-2021 Gavin D. Howard and contributors.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+
+# Just print the usage and exit with an error.
+usage() {
+	printf 'usage: %s [-a] [afl_compiler]\n' "$0" 1>&2
+	printf '\n'
+	printf '       If -a is given, then an ASan ready build is created.\n'
+	printf '       Otherwise, a normal fuzz build is created.\n'
+	printf '       The ASan-ready build is for running under\n'
+	printf '       `tests/afl.py --asan`, which checks that there were no\n'
+	printf '       memory errors in any path found by the fuzzer.\n'
+	printf '       It might also be useful to run scripts/randmath.py on an\n'
+	printf '       ASan-ready binary.\n'
+	exit 1
+}
+
+script="$0"
+scriptdir=$(dirname "$script")
+
+asan=0
+
+# Process command-line arguments.
+while getopts "a" opt; do
+
+	case "$opt" in
+		a) asan=1 ; shift ;;
+		?) usage "Invalid option: $opt" ;;
+	esac
+
+done
+
+if [ $# -lt 1 ]; then
+	CC=afl-clang-lto
+else
+	CC="$1"
+fi
+
+# We want this for extra sensitive crashing
+AFL_HARDEN=1
+
+cd "$scriptdir/.."
+
+set -e
+
+if [ "$asan" -ne 0 ]; then
+	CFLAGS="-flto -fsanitize=address"
+else
+	CFLAGS="-flto"
+fi
+
+# We want a debug build because asserts are counted as crashes too.
+CC="$CC" CFLAGS="$CFLAGS" ./configure.sh -gO3 -z
+
+make -j16