test: add a script to run the fuzzer and compute the coverage

tests/fuzzing/local_run.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Clean
+rm -rf build
+
+# Build the fuzzer
+cmake -B build -S . -DCMAKE_C_COMPILER=/usr/bin/clang
+cmake --build build
+
+# Create the corpus directory if it doesn't exist
+if ! [ -d ./corpus ]; then
+    mkdir corpus
+fi
+
+# Run the fuzzer on half CPU cores
+ncpus=$(nproc)
+jobs=$(($ncpus/2))
+echo "The fuzzer will start very soon, press Ctrl-C when you want to stop it and compute the coverage"
+./build/fuzzer -max_len=8192 -jobs="$jobs" ./corpus
+
+
+read -p "Would you like to compute coverage (y/n)? " -n 1 -r
+echo
+if [[ $REPLY =~ ^[Nn]$ ]]
+then
+    exit 0
+fi
+
+# Remove previous artifcats
+rm default.profdata default.profraw
+
+# Run profiling on the corpus
+./build/fuzzer -max_len=8192 -runs=0 ./corpus
+
+# Compute coverage
+llvm-profdata merge -sparse *.profraw -o default.profdata
+llvm-cov show build/fuzzer -instr-profile=default.profdata -format=html -ignore-filename-regex='ethereum-plugin-sdk\/|secure-sdk\/' > report.html
+llvm-cov report build/fuzzer -instr-profile=default.profdata -ignore-filename-regex='ethereum-plugin-sdk\/|secure-sdk\/'