[libchewing] first fuzzer

libchewing is a library for Chinese character input.

libchewing/Dockerfile

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+# 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 make autoconf automake libtool texinfo
+
+CMD /src/oss-fuzz/libchewing/build.sh

libchewing/Jenkinsfile

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+// 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',
+                                        'master', null, '')
+
+libfuzzerBuild {
+  git = "https://github.com/chewing/libchewing.git"
+}

libchewing/build.sh

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+#!/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/libchewing
+
+# build the library.
+./autogen.sh
+./configure --disable-shared --enable-static --without-sqlite3
+make clean all
+
+# build your fuzzer(s)
+make -C test CFLAGS="$CFLAGS -Dmain=stress_main -Drand=get_fuzz_input" stress.o
+
+./libtool --mode=link \
+    $CC $CFLAGS \
+    -o /out/chewing_fuzzer \
+    /src/oss-fuzz/libchewing/chewing_fuzzer.c \
+    test/stress.o test/libtesthelper.la src/libchewing.la $LDFLAGS /work/libfuzzer/*.o
+
+# install data files
+make -C data pkgdatadir=/out install

libchewing/chewing_fuzzer.c

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+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <libgen.h>
+
+static const uint8_t* fuzz_ptr;
+static const uint8_t* fuzz_input;
+static size_t fuzz_size;
+
+int stress_main(int argc, char** argv);
+
+ int LLVMFuzzerInitialize(int* argc, char*** argv) {
+   char* exe_path = (*argv)[0];
+   char* dir = dirname(exe_path);
+   // Assume data files are at the same location as executable.
+   setenv("CHEWING_PATH", dir, 0);
+   setenv("CHEWING_USER_PATH", dir, 0);
+   return 0;
+ }
+
+int get_fuzz_input() {
+  if (fuzz_ptr - fuzz_input >= fuzz_size)
+    return EOF;
+  return *fuzz_ptr++;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  fuzz_input = fuzz_ptr = data;
+  fuzz_size = size;
+
+  const char *stress_argv[] = {
+    "./chewing_fuzzer",
+    "-extra",
+    "-loop", "1",
+    NULL,
+  };
+  stress_main(4, (char**)stress_argv);
+  return 0;
+}