Tech Stack

• bpftrace

• BCC

• LLVM

The LLVM compiler supports BPF as a compilation target. BPF programs can be written using a higher-level language that LLVM supports, such as C (via Clang) or LLVM Intermediate Representation (IR), and then compiled into BPF. LLVM includes an optimizer, which improves the efficiency and size of the BPF instructions it emits.

Traditional BPF toolkit

bpftrace depends

$ sudo apt install linux-headers-$(uname -r)

$ sudo apt install bpftrace

The following NEW packages will be installed:
  bpftrace libbpfcc libclang1-9 libllvm9


# shared library for BPF Compiler Collection (BCC)
apt show libbpfcc
dpkg -L libbpfcc

# LLVM runtime library.
apt show libllvm9
dpkg -L libllvm9

# C interface to the Clang library
apt show libclang1-9
dpkg -L libclang1-9

BCC depends

$ sudo apt-get install bpfcc-tools 

The following additional packages will be installed:
  ieee-data python3-bpfcc python3-netaddr
Suggested packages:
  ipython3 python-netaddr-docs

Clang

$ sudo apt install clang

The following additional packages will be installed:
  binfmt-support clang-10 gcc-9-base lib32gcc-s1 lib32stdc++6 libasan5 libatomic1 libc-dev-bin libc6-dev libc6-i386 libclang-common-10-dev libclang-cpp10
  libclang1-10 libcrypt-dev libffi-dev libgc1c2 libgcc-9-dev libgomp1 libitm1 libllvm10 liblsan0 libncurses-dev libobjc-9-dev libobjc4 libomp-10-dev
  libomp5-10 libpfm4 libquadmath0 libstdc++-9-dev libtinfo-dev libtsan0 libubsan1 libz3-4 libz3-dev linux-libc-dev llvm-10 llvm-10-dev llvm-10-runtime
  llvm-10-tools manpages-dev python3-pygments
Suggested packages:
  clang-10-doc glibc-doc ncurses-doc libomp-10-doc libstdc++-9-doc llvm-10-doc python-pygments-doc ttf-bitstream-vera
The following NEW packages will be installed:
  binfmt-support clang clang-10 gcc-9-base lib32gcc-s1 lib32stdc++6 libasan5 libatomic1 libc-dev-bin libc6-dev libc6-i386 libclang-common-10-dev
  libclang-cpp10 libclang1-10 libcrypt-dev libffi-dev libgc1c2 libgcc-9-dev libgomp1 libitm1 libllvm10 liblsan0 libncurses-dev libobjc-9-dev libobjc4
  libomp-10-dev libomp5-10 libpfm4 libquadmath0 libstdc++-9-dev libtinfo-dev libtsan0 libubsan1 libz3-4 libz3-dev linux-libc-dev llvm-10 llvm-10-dev
  llvm-10-runtime llvm-10-tools manpages-dev python3-pygments
  
  $ apt show clang
  Clang project is a C, C++, Objective C and Objective C++ front-end
 for the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler
 Collection (GCC).

GCC vs Clang:

https://www.incredibuild.com/blog/gcc-vs-clang-battle-of-the-behemoths