fuzzer: Add evmone-fuzzer for EVMC VMs

[chfast]

This is not build on CI. This might be done later. But I'm using this code locally all the time and is quite stable now (I rarely do changes there) so it's good time to put it in the repo finally.

cc @cryptomental

[codecov-io]

Codecov Report

Merging #162 into master will decrease coverage by 1.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #162      +/-   ##
==========================================
- Coverage   90.21%   89.09%   -1.12%     
==========================================
  Files          21       21              
  Lines        2237     2237              
  Branches      218      217       -1     
==========================================
- Hits         2018     1993      -25     
- Misses        192      217      +25     
  Partials       27       27

[cryptomental]

I will do the review and test it today evening.

[cryptomental]

Hi @chfast do you have a Docker image handy to build it?

I could not build the evmone with -DEVMONE_FUZZING=ON and -DEVMONE_FUZZING_COVERAGE on my vanilla Ubuntu 18.04 LTS and clang 6 yesterday, neither Debian Buster and clang 7, for some reason apt.llvm.org is down today and I could not get the latest clang 9 to verify that...

I tried to build with

FROM debian:buster as evmone_fuzzer

RUN apt-get update -q && apt-get install -qy g++ cmake make software-properties-common git sudo build-essential wget curl

ADD . /src

RUN apt-get update && apt-get install -y clang lldb lld clang-tools

RUN mkdir /build && cmake -S /src -B /build -DEVMONE_FUZZING=ON -DEVMONE_FUZZING_COVERAGE=ON

ENV CC=clang
ENV CXX=clang++
RUN cmake --build /build --target evmone-fuzzer

ENTRYPOINT ["/bin/bash"]

fails with

...
 ---> Running in 60460de8ce49
Scanning dependencies of target instructions
[  8%] Building C object evmc/lib/instructions/CMakeFiles/instructions.dir/instruction_metrics.c.o
[ 16%] Building C object evmc/lib/instructions/CMakeFiles/instructions.dir/instruction_names.c.o
[ 25%] Linking C static library libevmc-instructions.a
[ 25%] Built target instructions
Scanning dependencies of target testutils
[ 33%] Building CXX object test/utils/CMakeFiles/testutils.dir/utils.cpp.o
c++: error: unrecognized command line option '-fprofile-instr-generate'; did you mean '-fprofile-generate'?
c++: error: unrecognized command line option '-fcoverage-mapping'; did you mean '-Wcoverage-mismatch'?
make[3]: *** [test/utils/CMakeFiles/testutils.dir/build.make:63: test/utils/CMakeFiles/testutils.dir/utils.cpp.o] Error 1
make[2]: *** [CMakeFiles/Makefile2:423: test/utils/CMakeFiles/testutils.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:745: test/fuzzer/CMakeFiles/evmone-fuzzer.dir/rule] Error 2
make: *** [Makefile:340: evmone-fuzzer] Error 2
The command '/bin/sh -c cmake --build /build --target evmone-fuzzer' returned a non-zero code: 2

[chfast]

Set -DEVMONE_FUZZING_COVERAGE=OFF. This one is only needed to check source code coverage after you have the corpus.

[cryptomental]

With help from @chfast I was able to build and run with ethereum/cpp-build-env Docker image.

FROM ethereum/cpp-build-env

ADD . /src

ENV CC=clang
ENV CXX=clang++
RUN mkdir /home/builder/build && cmake -S /src -B /home/builder/build -DEVMONE_FUZZING=ON -DEVMONE_TESTING=ON
RUN cmake --build /home/builder/build --target evmone-fuzzer

ENTRYPOINT ["/bin/bash"]

I had a look at the contents and the PR looks reasonable for merging.