add LLVM libc++ (llvm_libcxx) (#904)

projects/llvm_libcxx/Dockerfile

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+# Copyright 2017 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 gcr.io/oss-fuzz-base/base-builder
+RUN svn co http://llvm.org/svn/llvm-project/libcxxabi/trunk libcxxabi
+RUN svn co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx
+COPY build.sh $SRC/

projects/llvm_libcxx/build.sh

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+#!/bin/bash -eu
+# Copyright 2017 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.
+#
+################################################################################
+
+for f in sort stable_sort partition stable_partition nth_element partial_sort; do
+  cat > ${f}_fuzzer.cc <<EOF
+#include "fuzzing/fuzzing.h"
+#include <cassert>
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  int result = fuzzing::$f(data, size);
+  assert(result == 0); return 0;
+}
+EOF
+  $CXX $CXXFLAGS -std=c++11 ${f}_fuzzer.cc ./libcxx/fuzzing/fuzzing.cpp -I ./libcxx  -o $OUT/$f -lFuzzingEngine
+done

projects/llvm_libcxx/project.yaml

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+homepage: "https://libcxx.llvm.org/"
+primary_contact: "mclow.lists@gmail.com"