Add afl

.gitignore

@@ -40,5 +40,8 @@ result
 testcmd
 unit_tests
 
-# Python (CI)
-*.pyc
+# Debug
+.dbug
+
+# AFL
+afl/generated

Makefile

@@ -70,6 +70,7 @@ endef
 $(eval $(call mk-profile, release, SRC, , $(BIN_NAME)))
 $(eval $(call mk-profile, debug, SRC, -D U_DEBUG_MODE -g3, debug))
 $(eval $(call mk-profile, test, SRC, --coverage, test))
+$(eval $(call mk-profile, afl, SRC, -D AFL_MODE, afl_runner))
 
 all: $(NAME_release)
 
@@ -85,6 +86,31 @@ cov: tests_run
 		--exclude-unreachable-branches \
 		--exclude tests
 
+.PHONY: afl
+afl: CC := AFL_USE_ASAN=1 afl-gcc-fast
+afl: $(NAME_afl)
+
+define newline
+
+
+endef
+
+AFL_FLAGS := -i afl/inputs
+AFL_FLAGS += -x afl/tokens
+AFL_FLAGS += -o afl/generated
+
+PROCS ?= $(shell nproc)
+
+.PHONY: afl_run
+afl_run: afl
+	@ mkdir -p afl/generated
+	screen -dmS main_instance \
+		afl-fuzz $(AFL_FLAGS) -M fuzzer_1 -- ./afl_runner
+	$(foreach instance, $(shell seq 1 $(PROCS)),\
+		screen -dmS afl_$(instance) \
+		afl-fuzz $(AFL_FLAGS) -S fuzzer_$(instance) -- ./afl_runner$(newline))
+	watch -n 0.25 -- afl-whatsup -s afl/generated
+
 clean:
 	@ $(RM) $(OBJ)
 	@ $(LOG_TIME) "$(C_YELLOW) RM $(C_PURPLE) $(OBJ) $(C_RESET)"

afl/inputs/commands

@@ -0,0 +1,4 @@
+hi
+cd
+ls
+env

afl/tokens/tokens

@@ -0,0 +1,7 @@
+... ~ / \t
+abc def ghi
+jkl mno pqr
+stu vw xyz
+!! ? - = !=
+ & >> << < >
+012 345 678 9

src/exec.c

@@ -146,6 +146,9 @@ int launch_bin(char *full_bin_path, char **args, env_t *env, char *buff)
     pid_t pid = fork();
 
     if (pid == 0) {
+#if defined(AFL_MODE)
+        exit(0);
+#else
         if (execve(full_bin_path, args, env->env) < 0) {
             status = command_error(full_bin_path, args, errno);
             free_env(env);
@@ -153,6 +156,7 @@ int launch_bin(char *full_bin_path, char **args, env_t *env, char *buff)
             free(buff);
             exit(status);
         }
+#endif
     }
     waitpid(pid, &status, 0);
     return status;