[wasmtime] initial integration (#3292)

projects/wasmtime/Dockerfile

@@ -0,0 +1,30 @@
+# 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
+MAINTAINER foote@fastly.com
+RUN apt-get update && apt-get install -y make autoconf automake libtool curl cmake python llvm-dev libclang-dev clang
+
+RUN curl https://sh.rustup.rs | sh -s -- -y --default-toolchain=nightly
+RUN /bin/bash -c "source $HOME/.cargo/env && cargo install cargo-fuzz" 
+
+RUN git clone --depth 1 https://github.com/bytecodealliance/wasmtime wasmtime
+WORKDIR wasmtime
+RUN git submodule update --init --recursive
+
+RUN git clone --depth 1 https://github.com/bytecodealliance/wasmtime-libfuzzer-corpus wasmtime-libfuzzer-corpus
+
+COPY build.sh $SRC/

projects/wasmtime/build.sh

@@ -0,0 +1,41 @@
+#!/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.
+#
+################################################################################
+
+# Note: This project creates Rust fuzz targets exclusively
+
+source $HOME/.cargo/env
+
+export CUSTOM_LIBFUZZER_PATH="$LIB_FUZZING_ENGINE_DEPRECATED"
+export CUSTOM_LIBFUZZER_STD_CXX=c++
+PROJECT_DIR=$SRC/wasmtime
+
+# Because Rust does not support sanitizers via CFLAGS/CXXFLAGS, the environment 
+# variables are overridden with values from base-images/base-clang only
+
+export CFLAGS="-O1 -fno-omit-frame-pointer -gline-tables-only -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION"
+export CXXFLAGS_EXTRA="-stdlib=libc++"
+export CXXFLAGS="$CFLAGS $CXXFLAGS_EXTRA"
+
+cd $PROJECT_DIR/fuzz && cargo fuzz build -O --debug-assertions
+
+FUZZ_TARGET_OUTPUT_DIR=$PROJECT_DIR/target/x86_64-unknown-linux-gnu/release
+for f in $SRC/wasmtime/fuzz/fuzz_targets/*.rs
+do
+    FUZZ_TARGET_NAME=$(basename ${f%.*})
+    cp $FUZZ_TARGET_OUTPUT_DIR/$FUZZ_TARGET_NAME $OUT/
+    zip -jr $OUT/${FUZZ_TARGET_NAME}_seed_corpus.zip $PROJECT_DIR/wasmtime-libfuzzer-corpus/$FUZZ_TARGET_NAME/
+done

projects/wasmtime/project.yaml

@@ -3,3 +3,7 @@ primary_contact: "jonathan.foote@gmail.com"
 auto_ccs:
   - "security@bytecodealliance.com"
   - "fitzgen@gmail.com"
+sanitizers:
+  - address
+fuzzing_engines:
+  - libfuzzer