Rusty docker setting

@tag(programming)

Recently I'm learning debugging and profiling tools of Rust on Linux. I utilize docker to build a debian container and install various kinds of tools(e.g., LLDB, perf). However, to use LLDB in docker container, there're some notices which one may need to care.

LLDB python3 lib path problem

I install LLDB ion the official Rust image via:

apt-get install lldb python3-lldb

But when I typed rust-lldb, I encountered the following error messages:

ModuleNotFoundError: No module named ‘lldb.embedded_interpreter’ · Issue #55575 · llvm/llvm-project;

After quite some googling, I found this script useful:

ln -s /usr/lib/llvm-14/lib/python3.11/dist-packages/lldb/* /usr/lib/python3/dist-packages/lldb/

Still, the version of python may vary on different lldb versions. Replace the actual version number if necessary.

Container addtional options

When I thought "I have fixed the python3 problem and here we go!", another problem arises. I just cannot use LLDB commands!

It turns out that I have to include some addtional options to enable debugging:

docker run -dit --cap-add=SYS_PTRACE --security-opt seccomp=unconfined rust

Now LLDB is ready for debugging rust programs!