[Eigen] Add project (#2637)

projects/eigen/Dockerfile

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+# Copyright 2019 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
+MAINTAINER eigen-core-team@lists.tuxfamily.org
+RUN apt-get update && apt-get install --yes cmake mercurial
+RUN hg clone https://GOOGLE-AUTOFUZZ@bitbucket.org/eigen/eigen
+WORKDIR eigen
+COPY build.sh solver_fuzzer.cc $SRC/

projects/eigen/build.sh

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+#!/bin/bash -eu
+# Copyright 2019 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.
+#
+################################################################################
+
+# build project
+mkdir build_dir && cd build_dir
+cmake ..
+make install
+cd ..
+
+# build fuzzers
+for fuzzers in $(find $SRC -name '*_fuzzer.cc'); do
+  fuzz_basename=$(basename -s .cc $fuzzers)
+  $CXX $CXXFLAGS -std=c++11 -I. -Isrc/Eigen/Core \
+  $fuzzers -o $OUT/$fuzz_basename $LIB_FUZZING_ENGINE
+done

projects/eigen/project.yaml

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+homepage: "http://eigen.tuxfamily.org/index.php?title=Main_Page"
+primary_contact: "eigen-core-team@lists.tuxfamily.org"
+sanitizers:
+  - address
+  - memory
+  - undefined

projects/eigen/solver_fuzzer.cc

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+// Copyright 2019 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 <cstddef>
+#include <cstdint>
+#include <cstdlib>
+#include <string>
+
+#include "Eigen/Core"
+#include "Eigen/src/Core/Matrix.h"
+
+using ::Eigen::Matrix;
+using ::Eigen::Dynamic;
+using ::Eigen::Lower;
+using ::Eigen::Upper;
+
+int ConsumeNextInt(const uint8_t** data, size_t* size) {
+  if (*size < sizeof(int)) {
+    return 0;
+  }
+  int result;
+  memcpy(&result, *data, sizeof(int));
+  *size -= sizeof(int);
+  *data += sizeof(int);
+  return result;
+}
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  const size_t rows = static_cast<size_t>(ConsumeNextInt(&data, &size));
+  const size_t columns = static_cast<size_t>(ConsumeNextInt(&data, &size));
+
+  if (rows == 0 || columns == 0) {
+    return 0;
+  }
+  if (rows > 1024 || columns > 1024) {
+    return 0;
+  }
+
+  // We can do this same fuzz test with other templated types. Here, we just use
+  // an int.
+  Matrix<int, Dynamic, 1> vec(rows);
+  for (size_t i = 0; i < rows; ++i) {
+    vec(i) = ConsumeNextInt(&data, &size);
+  }
+  Matrix<int, Dynamic, Dynamic> matrix(rows, columns);
+  for (int i = 0; i < rows; ++i) {
+    for (int j = 0; j < columns; ++j) {
+      matrix(i, j) = ConsumeNextInt(&data, &size);
+    }
+  }
+
+  matrix.template triangularView<Lower>().solve(vec);
+  matrix.template triangularView<Upper>().solve(vec);
+  matrix.conjugate().template triangularView<Lower>().solve(vec);
+  matrix.conjugate().template triangularView<Upper>().solve(vec);
+  matrix.transpose().template triangularView<Lower>().solve(vec);
+  matrix.transpose().template triangularView<Upper>().solve(vec);
+
+  return 0;
+}