Ply – a dynamic tracer for Linux

What it does

Type inference in combination with a compact C-like syntax means scripts can be written and edited in seconds, directly in your favorite shell. The language is heavily inspired by, though not nearly as powerful as, awk(1) and dtrace(1). Designed with embedded systems in mind. Written in C, all ply needs to run is libc and a modern kernel with Linux BPF support. No external kernel modules, no LLVM, no python. Works on aarch64, arm, powerpc, and x86_64 today — adding an ISA is easy. Data gathering and aggregation is done in the kernel using Linux BPF programs that are JIT compiled to native instructions on most common architectures. Thus, ply runs with very low overhead, allowing it to…from wkz.github.io

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