No coverage percentage output in Hyperpill fuzzing with Clang source coverage

[HanzhongPeng]

Hello Hyperpill team,

I am trying to enable source coverage output while fuzzing Hyperpill using Clang's source-based coverage. I followed the instructions from Discord and compiled L1 QEMU with the following configuration
export CC=clang export CXX=clang++ export CFLAGS="-fprofile-instr-generate -fcoverage-mapping" export CXXFLAGS="-fprofile-instr-generate -fcoverage-mapping" ./configure --target-list=x86_64-softmmu --enable-slirp --enable-sanitizers
I also set NOCOV=0 in scripts/run_hyperpill.sh. However, there is no coverage percentage output during fuzzing.
I have checked that Clang's coverage instrumentation should be enabled, but I am unsure if there are additional configurations required for Hyperpill to generate and display coverage data.
Could you provide any guidance on how to properly enable and retrieve coverage statistics while fuzzing Hyperpill?