fuzzing: Speed up afl using persistent mode (in proccess fuzzing)

fuzzing/CMakeLists.txt

@@ -18,6 +18,8 @@ if (ENABLE_FUZZING)
         set(fuzz_print_parameter "yes")
     endif()
 
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-error")
+
     add_custom_target(afl
         COMMAND "${AFL_FUZZ}" -i "${CMAKE_CURRENT_SOURCE_DIR}/inputs" -o "${CMAKE_CURRENT_BINARY_DIR}/findings" -x "${CMAKE_CURRENT_SOURCE_DIR}/json.dict" -- "${CMAKE_CURRENT_BINARY_DIR}/afl-main" "@@" "${fuzz_print_parameter}"
         DEPENDS afl-main)

fuzzing/afl.c

@@ -87,7 +87,7 @@ int main(int argc, char** argv)
     const char *filename = NULL;
     cJSON *item = NULL;
     char *json = NULL;
-    int status = EXIT_SUCCESS;
+    int status;
     char *printed_json = NULL;
 
     if ((argc < 2) || (argc > 3))
@@ -100,6 +100,12 @@ int main(int argc, char** argv)
 
     filename = argv[1];
 
+#if __AFL_HAVE_MANUAL_CONTROL
+    while (__AFL_LOOP(1000))
+    {
+#endif
+    status = EXIT_SUCCESS;
+
     json = read_file(filename);
     if ((json == NULL) || (json[0] == '\0') || (json[1] == '\0'))
     {
@@ -149,15 +155,21 @@ cleanup:
     if (item != NULL)
     {
         cJSON_Delete(item);
+        item = NULL;
     }
     if (json != NULL)
     {
         free(json);
+        json = NULL;
     }
     if (printed_json != NULL)
     {
         free(printed_json);
+        printed_json = NULL;
+    }
+#if __AFL_HAVE_MANUAL_CONTROL
     }
+#endif
 
     return status;
 }