Add AFL style Instrumentations

compilers/Makefile

@@ -0,0 +1,84 @@
+#
+# american fuzzy lop - makefile
+# -----------------------------
+#
+# Originally written and maintained by Michal Zalewski <lcamtuf@google.com>
+#
+# Copyright 2013, 2014, 2015, 2016, 2017 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Modified by GRIMM
+
+COMM_HDR    = alloc-inl.h config.h debug.h types.h
+PROGS       = afl-gcc
+
+
+PREFIX     ?= /usr/local
+BIN_PATH    = $(PREFIX)/bin
+HELPER_PATH = $(PREFIX)/lib/afl
+DOC_PATH    = $(PREFIX)/share/doc/afl
+
+CFLAGS     ?= -O3 -funroll-loops
+CFLAGS     += -Wall -D_FORTIFY_SOURCE=2 -g -Wno-pointer-sign \
+              -DAFL_PATH=\"$(HELPER_PATH)\" -DDOC_PATH=\"$(DOC_PATH)\" \
+              -DBIN_PATH=\"$(BIN_PATH)\"
+
+ifeq "$(findstring clang, $(shell $(CC) --version 2>/dev/null))" ""
+  TEST_CC   = afl-gcc
+else
+  TEST_CC   = afl-clang
+endif
+
+all: test_x86 $(PROGS) afl-as test_build all_done
+
+ifndef AFL_NO_X86
+test_x86:
+	@echo "[*] Checking for the ability to compile x86 code..."
+	@echo 'main() { __asm__("xorb %al, %al"); }' | $(CC) -w -x c - -o .test || ( echo; echo "Oops, looks like your compiler can't generate x86 code."; echo; echo "Don't panic! You can use the LLVM or QEMU mode, but see docs/INSTALL first."; echo "(To ignore this error, set AFL_NO_X86=1 and try again.)"; echo; exit 1 )
+	@rm -f .test
+	@echo "[+] Everything seems to be working, ready to compile."
+else
+test_x86:
+	@echo "[!] Note: skipping x86 compilation checks (AFL_NO_X86 set)."
+endif
+
+
+afl-gcc: afl-gcc.c $(COMM_HDR) | test_x86
+	$(CC) $(CFLAGS) $@.c -o $@ $(LDFLAGS)
+	set -e; for i in afl-g++ afl-clang afl-clang++; do ln -sf afl-gcc $$i; done
+	ln -sf afl-gcc afl-clang
+	ln -sf afl-gcc afl-clang++
+	ln -sf afl-gcc afl-g++
+
+afl-as: afl-as.c afl-as.h $(COMM_HDR) | test_x86
+	$(CC) $(CFLAGS) $@.c -o $@ $(LDFLAGS)
+	ln -sf afl-as as
+
+afl-showmap: afl-showmap.c hash.h $(COMM_HDR) | test_x86
+	$(CC) $(CFLAGS) $@.c -o $@ $(LDFLAGS)
+
+ifndef AFL_NO_X86
+test_build: test-instr.c afl-gcc afl-as afl-showmap
+	@echo "[*] Testing the CC wrapper and instrumentation output..."
+	unset AFL_USE_ASAN AFL_USE_MSAN; AFL_QUIET=1 AFL_INST_RATIO=100 AFL_PATH=. ./$(TEST_CC) $(CFLAGS) test-instr.c -o test-instr $(LDFLAGS)
+	echo 0 | ./afl-showmap -m none -q -o .test-instr0 ./test-instr
+	echo 1 | ./afl-showmap -m none -q -o .test-instr1 ./test-instr
+	@rm -f test-instr
+	@cmp -s .test-instr0 .test-instr1; DR="$$?"; rm -f .test-instr0 .test-instr1; if [ "$$DR" = "0" ]; then echo; echo "Oops, the instrumentation does not seem to be behaving correctly!"; echo; echo "Please ping <lcamtuf@google.com> to troubleshoot the issue."; echo; exit 1; fi
+	@echo "[+] All right, the instrumentation seems to be working!"
+else
+test_build: afl-gcc afl-as afl-showmap
+	@echo "[!] Note: skipping build tests (you may need to use LLVM or QEMU mode)."
+endif
+
+all_done: test_build
+	@if [ ! "`which clang 2>/dev/null`" = "" ]; then echo "[+] LLVM users: see llvm_mode/README.llvm for a faster alternative to afl-gcc."; fi
+	@echo "[+] All done! Be sure to review README - it's pretty short and useful."
+	@if [ "`uname`" = "Darwin" ]; then printf "\nWARNING: Fuzzing on MacOS X is slow because of the unusually high overhead of\nfork() on this OS. Consider using Linux or *BSD. You can also use VirtualBox\n(virtualbox.org) to put AFL inside a Linux or *BSD VM.\n\n"; fi
+	@! tty <&1 >/dev/null || printf "\033[0;30mNOTE: If you can read this, your terminal probably uses white background.\nThis will make the UI hard to read. See docs/status_screen.txt for advice.\033[0m\n" 2>/dev/null
+