[libra] adding fuzzers for libra (#3472)

projects/libra/Dockerfile

@@ -0,0 +1,33 @@
+# 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.
+#
+################################################################################
+
+# google oss-fuzz stuff
+FROM gcr.io/oss-fuzz-base/base-builder
+MAINTAINER davidwg@fb.com
+
+# install other tools we might need
+RUN apt-get update && apt-get install -y cmake curl
+
+# install rust and cargo-fuzz
+ENV CARGO_HOME=/rust RUSTUP_HOME=/rust/rustup PATH=$PATH:/rust/bin
+RUN curl https://sh.rustup.rs | sh -s -- -y 
+
+# get libra
+RUN git clone --depth 1 https://github.com/libra/libra $SRC/libra
+WORKDIR $SRC/libra
+
+# building script for fuzzers
+COPY build.sh $SRC/

projects/libra/build.sh

@@ -0,0 +1,56 @@
+#!/bin/bash -eux
+# 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.
+#
+################################################################################
+
+# Note: This project creates Rust fuzz targets exclusively
+
+# make OSS-Fuzz work with Rust
+export CUSTOM_LIBFUZZER_PATH="$LIB_FUZZING_ENGINE_DEPRECATED"
+export CUSTOM_LIBFUZZER_STD_CXX=c++
+export CFLAGS="-O1 -fno-omit-frame-pointer -gline-tables-only -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION"
+export CXXFLAGS_EXTRA="-stdlib=libc++"
+export CXXFLAGS="$CFLAGS $CXXFLAGS_EXTRA"
+
+# RUSTC_BOOTSTRAP: to get some nightly features like ASAN
+export RUSTC_BOOTSTRAP=1 
+
+#
+cd $SRC/libra/testsuite/libra-fuzzer
+
+# list fuzzers
+cargo run --bin libra-fuzzer list --no-desc > fuzzer_list
+
+# build corpus and move to $OUT
+cat fuzzer_list | while read -r line
+do
+    cargo run --bin libra-fuzzer generate -n 128 $line
+    zip -r $OUT/"$line"_seed_corpus.zip fuzz/corpus/$line
+    rm -r fuzz/corpus/$line
+done
+
+# build fuzzers
+# --cfg fuzzing      -> used to change code logic
+# -Cdebug-assertions -> to get debug_assert in rust
+# other flags        -> taken from cargo fuzz
+export RUSTFLAGS="--cfg fuzzing -Cdebug-assertions -Cpasses=sancov -Cllvm-args=-sanitizer-coverage-level=4 -Cllvm-args=-sanitizer-coverage-trace-compares -Cllvm-args=-sanitizer-coverage-inline-8bit-counters -Cllvm-args=-sanitizer-coverage-trace-geps -Cllvm-args=-sanitizer-coverage-prune-blocks=0 -Cllvm-args=-sanitizer-coverage-pc-table -Clink-dead-code -Cllvm-args=-sanitizer-coverage-stack-depth -Zsanitizer=address -Ccodegen-units=1"
+cat fuzzer_list | while read -r line
+do
+    # build
+    export SINGLE_FUZZ_TARGET="$line"
+    cargo build --manifest-path fuzz/Cargo.toml --bin fuzzer_builder --target x86_64-unknown-linux-gnu
+    # move fuzzer to $OUT
+    mv $SRC/libra/target/x86_64-unknown-linux-gnu/debug/fuzzer_builder $OUT/$SINGLE_FUZZ_TARGET
+done

projects/libra/project.yaml

@@ -2,3 +2,8 @@ homepage: "https://github.com/libra/libra"
 primary_contact: "davidwong.crypto@gmail.com"
 auto_ccs:
   - "davidwg@fb.com"
+language: rust
+sanitizers:
+  - address
+fuzzing_engines:
+  - libfuzzer