Report Function Execution

Requirements

• llvm-14 and clang-14
• cmake 3.1

Build

Building the Pass

mkdir build && cd build
cmake ..
make
cd ..

Building the Reporter

# get json lib
mkdir -p include
mkdir -p include/nlohmann
wget https://github.com/nlohmann/json/releases/download/v3.11.2/json.hpp -O include/nlohmann/json.hpp
make

Usage

Pass instrumentation happens at optimazation step. Compile source code into llvm-IR, instrument IR with the opt, then compile instrumented IR into exec.

cd example
clang -S -emit-llvm -Xclang -disable-O0-optnone example.c -o example.ll
opt -load ../build/report/libReportPass.so -report -enable-new-pm=0 -S example.ll > example2.ll
clang example2.ll

This implimentation is largely inspired by Runtime Execution Profiling using LLVM.