add fuzzing driver for oss-fuzz

Change-Id: I1476b646c05dbc7128353ae6ae6a999ce4c89627

5 files changed, 71 insertions, 2 deletions

diff --git a/configure.ac b/configure.ac
index 65a4ca5..3508c90 100644
--- a/configure.ac
+++ b/configure.ac
@@ -62,7 +62,19 @@ AC_ARG_ENABLE([tools],
 	[enable_tools="$enableval"],
 	[enable_tools=yes]
 )
-AS_IF([test "x$enable_tools" = "xyes"], [
+AM_CONDITIONAL(BUILD_TOOLS, [test "x$enable_tools" = "xyes"])
+
+# =======
+# Fuzzers
+# =======
+AC_ARG_ENABLE([fuzzers],
+	[AS_HELP_STRING([--enable-fuzzers], [Build fuzzer(s)])],
+	[enable_fuzzers="$enableval"],
+	[enable_fuzzers=no]
+)
+AM_CONDITIONAL(BUILD_FUZZERS, [test "x$enable_fuzzers" = "xyes"])
+
+AS_IF([test "x$enable_tools" = "xyes" -o "x$enable_fuzzers" = "xyes"], [
 	PKG_CHECK_MODULES([REVENGE_STREAM],[
 		librevenge-stream-0.0
 	])
@@ -74,7 +86,6 @@ AC_SUBST([REVENGE_STREAM_CFLAGS])
 AC_SUBST([REVENGE_STREAM_LIBS])
 AC_SUBST([REVENGE_GENERATORS_CFLAGS])
 AC_SUBST([REVENGE_GENERATORS_LIBS])
-AM_CONDITIONAL(BUILD_TOOLS, [test "x$enable_tools" = "xyes"])
 
 # =========
 # Find zlib
@@ -317,6 +328,7 @@ src/conv/svg/Makefile
 src/conv/svg/fh2svg.rc
 src/conv/text/Makefile
 src/conv/text/fh2text.rc
+src/fuzz/Makefile
 src/lib/Makefile
 src/lib/libfreehand.rc
 inc/Makefile
@@ -337,6 +349,7 @@ AC_MSG_NOTICE([
 Build configuration:
 	debug:           ${enable_debug}
 	docs:            ${build_docs}
+        fuzzers:         ${enable_fuzzers}
 	tools:           ${enable_tools}
 	werror:          ${enable_werror}
 ==============================================================================
diff --git a/src/Makefile.am b/src/Makefile.am
index 64fd45e..c83c78c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,3 +3,7 @@ SUBDIRS = lib
 if BUILD_TOOLS
 SUBDIRS += conv
 endif
+
+if BUILD_FUZZERS
+SUBDIRS += fuzz
+endif
diff --git a/src/fuzz/.gitignore b/src/fuzz/.gitignore
new file mode 100644
index 0000000..df86dfd
--- /dev/null
+++ b/src/fuzz/.gitignore
@@ -0,0 +1,8 @@
+.deps
+.libs
+*.lo
+*.la
+*.o
+Makefile
+Makefile.in
+*fuzzer
diff --git a/src/fuzz/Makefile.am b/src/fuzz/Makefile.am
new file mode 100644
index 0000000..3bb67ff
--- /dev/null
+++ b/src/fuzz/Makefile.am
@@ -0,0 +1,17 @@
+noinst_PROGRAMS = fhfuzzer
+
+AM_CXXFLAGS = -I$(top_srcdir)/inc \
+	$(REVENGE_GENERATORS_CFLAGS) \
+	$(REVENGE_CFLAGS) \
+	$(REVENGE_STREAM_CFLAGS) \
+	$(DEBUG_CXXFLAGS)
+
+fhfuzzer_LDADD = \
+	$(top_builddir)/src/lib/libfreehand-@FH_MAJOR_VERSION@.@FH_MINOR_VERSION@.la \
+	$(REVENGE_GENERATORS_LIBS) \
+	$(REVENGE_LIBS) \
+	$(REVENGE_STREAM_LIBS) \
+	-lFuzzingEngine
+
+fhfuzzer_SOURCES = \
+	fhfuzzer.cpp
diff --git a/src/fuzz/fhfuzzer.cpp b/src/fuzz/fhfuzzer.cpp
new file mode 100644
index 0000000..4693e4c
--- /dev/null
+++ b/src/fuzz/fhfuzzer.cpp
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * This file is part of the libfreehand project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <cstdint>
+#include <cstdlib>
+
+#include <libfreehand/libfreehand.h>
+
+#include <librevenge-generators/librevenge-generators.h>
+
+#include <librevenge-stream/librevenge-stream.h>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+  librevenge::RVNGStringStream input(data, size);
+  librevenge::RVNGRawDrawingGenerator generator(true);
+  libfreehand::FreeHandDocument::parse(&input, &generator);
+  return 0;
+}
+
+/* vim:set shiftwidth=2 softtabstop=2 expandtab: */