add fuzzer for libteken (#47)

libteken/Dockerfile

@@ -0,0 +1,21 @@
+# Copyright 2016 Google Inc.
+#
+# 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
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM ossfuzz/base-libfuzzer
+MAINTAINER kcwu@csie.org
+RUN apt-get install -y pmake
+RUN svn co https://svn.freebsd.org/base/head/sys/teken
+COPY build.sh libteken_fuzzer.c /src/

libteken/Jenkinsfile

@@ -0,0 +1,22 @@
+// Copyright 2016 Google Inc.
+//
+// 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
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+def libfuzzerBuild = fileLoader.fromGit('infra/libfuzzer-pipeline.groovy',
+                                        'https://github.com/google/oss-fuzz.git')
+
+libfuzzerBuild {
+  svn = "https://svn.freebsd.org/base/head/sys/teken"
+}

libteken/build.sh

@@ -0,0 +1,28 @@
+#!/bin/bash -eu
+# Copyright 2016 Google Inc.
+#
+# 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
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+cd /src
+
+# build the library.
+pmake -C teken/libteken teken_state.h
+CFLAGS="$CFLAGS -D__unused=" pmake -C teken/libteken libteken.a
+
+# build your fuzzer(s)
+$CC $CFLAGS -Iteken \
+    -o /out/libteken_fuzzer \
+    libteken_fuzzer.c \
+    -lfuzzer teken/libteken/libteken.a $FUZZER_LDFLAGS

libteken/libteken_fuzzer.c

@@ -0,0 +1,31 @@
+#include <stdint.h>
+#include <stdio.h>
+
+#include <teken.h>
+
+static void dummy_bell(void *s) {}
+static void dummy_cursor(void *s, const teken_pos_t *p) {}
+static void dummy_putchar(void *s, const teken_pos_t *p, teken_char_t c,
+                          const teken_attr_t *a) {}
+static void dummy_fill(void *s, const teken_rect_t *r, teken_char_t c,
+                       const teken_attr_t *a) {}
+static void dummy_copy(void *s, const teken_rect_t *r, const teken_pos_t *p) {}
+static void dummy_param(void *s, int cmd, unsigned int value) {}
+static void dummy_respond(void *s, const void *buf, size_t len) {}
+
+static teken_funcs_t tf = {
+    .tf_bell = dummy_bell,
+    .tf_cursor = dummy_cursor,
+    .tf_putchar = dummy_putchar,
+    .tf_fill = dummy_fill,
+    .tf_copy = dummy_copy,
+    .tf_param = dummy_param,
+    .tf_respond = dummy_respond,
+};
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  teken_t t;
+  teken_init(&t, &tf, NULL);
+  teken_input(&t, data, size);
+  return 0;
+}