Add compilation of AFL and AFL wrapper script

Author: AlexGustafsson

.gitignore

@@ -0,0 +1,2 @@
+.DS_Store
+afl-sync

.gitmodules

@@ -10,3 +10,6 @@
 [submodule "sources/wasmerio"]
 	path = sources/wasmerio
 	url = https://github.com/wasmerio/c-http-server.git
+[submodule "sources/AFL"]
+	path = sources/AFL
+	url = https://github.com/google/AFL.git

Makefile

@@ -8,13 +8,19 @@ all: build
 # Build sources
 build: sources/aaron-kalair/server
 
-sources/aaron-kalair/server:
-	$(MAKE) ./sources/aaron-kalair/makefile server
-
 init:
-	git submodule init sources/aaron-kalair sources/soywood sources/wasmerio sources/wsic
+	git submodule init sources/aaron-kalair sources/soywood sources/wasmerio sources/wsic sources/AFL
 	$(MAKE) apply-patches
 
+sources/AFL/afl-g++:
+	AFL_CC=gcc AFL_CXX=g++ $(MAKE) -C ./sources/AFL afl-g++
+
+sources/AFL/afl-gcc:
+	AFL_CC=gcc AFL_CXX=g++ $(MAKE) -C ./sources/AFL afl-gcc
+
+sources/aaron-kalair/server: sources/AFL/afl-gcc
+	AFL_CC=gcc AFL_CXX=g++ AFL_HARDEN=1 CC=$(PWD)/sources/AFL/afl-gcc $(MAKE) -C ./sources/aaron-kalair server
+
 apply-patches:
 	cd sources/aaron-kalair && git apply --stat ../../patches/aaron-kalair.patch || true
 	cd sources/soywood && git apply --stat ../../patches/soywood.patch || true

README.md

@@ -11,6 +11,9 @@ make init
 
 Other commands:
 ```bash
+# Build AFL
+make afl
+
 # Create patches from altered sources
 make create-patches
 

afl.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+binary="$1"
+shift
+
+rm -rf afl-sync
+mkdir -p afl-sync
+
+function cleanup {
+  echo "Cleaning up fuzzers"
+  kill -9 "$fuzzer01" || true
+  kill -9 "$fuzzer02" || true
+  kill -9 "$fuzzer03" || true
+  kill -9 "$fuzzer04" || true
+}
+trap cleanup EXIT
+
+./sources/AFL/afl-fuzz -i inputs/afl -o afl-sync -M fuzzer01 "$binary" "$@" > /dev/null &
+fuzzer01="$!"
+sleep 5
+
+./sources/AFL/afl-fuzz -i inputs/afl -o afl-sync -S fuzzer02 "$binary" "$@" > /dev/null  &
+fuzzer02="$!"
+
+./sources/AFL/afl-fuzz -i inputs/afl -o afl-sync -S fuzzer03 "$binary" "$@" > /dev/null &
+fuzzer03="$!"
+
+./sources/AFL/afl-fuzz -i inputs/afl -o afl-sync -S fuzzer04 "$binary" "$@" > /dev/null &
+fuzzer04="$!"
+
+watch ./sources/AFL/afl-whatsup afl-sync