[exprtk] Initial Integration (#4543)

projects/exprtk/Dockerfile

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+# Copyright 2020 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 apt-get update && apt-get install -y make autoconf automake libtool
+RUN git clone --depth 1 https://github.com/ArashPartow/exprtk.git exprtk
+WORKDIR exprtk
+COPY build.sh exprtk_fuzzer.cpp exprtk_test_expressions.dict $SRC/

projects/exprtk/build.sh

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+#!/bin/bash -eu
+# Copyright 2020 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.
+#
+################################################################################
+
+cp $SRC/*.dict $OUT/
+
+CXXFLAGS="${CXXFLAGS} -O2 -fno-sanitize=integer-divide-by-zero,float-divide-by-zero"
+
+$CXX -std=c++11 $CXXFLAGS -I. -I$SRC/exprtk \
+     $SRC/exprtk_fuzzer.cpp -o $OUT/exprtk_fuzzer \
+     $LIB_FUZZING_ENGINE

projects/exprtk/exprtk_fuzzer.cpp

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+// Copyright 2020 Google LLC
+//
+// 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.
+
+#include <cstdint>
+#include <string>
+
+#include "exprtk.hpp"
+
+
+template <typename T>
+void run(const std::string& expression_string)
+{
+   typedef exprtk::symbol_table<T> symbol_table_t;
+   typedef exprtk::expression<T>     expression_t;
+   typedef exprtk::parser<T>             parser_t;
+
+   T x = T(1.2345);
+   T y = T(2.2345);
+   T z = T(3.2345);
+   T w = T(4.2345);
+
+   symbol_table_t symbol_table;
+   symbol_table.add_variable("x",x);
+   symbol_table.add_variable("y",y);
+   symbol_table.add_variable("z",z);
+   symbol_table.add_variable("w",w);
+   symbol_table.add_constants();
+
+   expression_t expression;
+   expression.register_symbol_table(symbol_table);
+
+   parser_t parser;
+   if (parser.compile(expression_string, expression))
+   {
+      expression.value();
+   }
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
+{
+   const std::string expression(reinterpret_cast<const char*>(data), size);
+
+   run<double>(expression);
+   run<float> (expression);
+
+   return 0;
+}

projects/exprtk/project.yaml

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+homepage: "https://www.partow.net/programming/exprtk/index.html"
+language: c++
+primary_contact: "exprtk.dev@gmail.com"
+auto_ccs:
+    - "exprtk.dev@gmail.com"
+fuzzing_engines:
+    - libfuzzer
+    - afl
+    - honggfuzz
+sanitizers:
+    - address
+    - undefined
+    - memory