Add frontend for fuzzing

Use the following configure command:

$ ./configure --with-fuzzer --with-fuzzer-lib=/path/to/libFuzzer.a \
      CC=clang CXX=clang++

Places an irssi-fuzz in src/fe-fuzz/ after build.

Also can specify SANFLAGS to override the chosen sanitizer flags
(defaults to "-g -fsanitize=address -fsanitize-coverage=trace-pc-guard").

1 files changed, 58 insertions, 0 deletions

diff --git a/src/fe-fuzz/irssi.c b/src/fe-fuzz/irssi.c
new file mode 100644
index 00000000..3b2c617a
--- /dev/null
+++ b/src/fe-fuzz/irssi.c
@@ -0,0 +1,58 @@
+/*
+ irssi.c : irssi
+
+    Copyright (C) 2017 Joseph Bisch
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "module.h"
+#include "modules-load.h"
+#include "levels.h"
+#include "module-formats.h"
+#include "themes.h"
+#include "core.h"
+#include "fe-common-core.h"
+#include "args.h"
+#include "printtext.h"
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+int LLVMFuzzerInitialize(int *argc, char ***argv) {
+	core_register_options();
+	fe_common_core_register_options();
+	/* no args */
+	args_execute(0, NULL);
+	core_preinit((*argv)[0]);
+	core_init();
+	fe_common_core_init();
+	theme_register(gui_text_formats);
+	module_register("core", "fe-fuzz");
+	printtext_string(NULL, NULL, MSGLEVEL_CLIENTCRAP, "init");
+	return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+	char *copy = (char *)malloc(sizeof(char)*(size+1));
+	memcpy(copy, data, size);
+	copy[size] = '\0';
+	printtext_string(NULL, NULL, MSGLEVEL_CLIENTCRAP, copy);
+	free(copy);
+	return 0;
+}