2 posts
# Using ftrace to Selectively Trace Parent Functions ## Background Taking the code in the memory cgroup subsystem as an example, the `__memory_events_show` function has two call sites, namely `memory_events_show` and `memory_events_local_show`. The code is as follows:
# Environment Setup - Install the compilation and debugging components - Since I only had an x86 environment with WSL on hand, I needed to use emulation to compile, run, and debug ARM programs - Referencing this [gist article](https://gist.github.com/luk6xff/9f8d2520530a823944355e59343eadc1), it is possible to run armv8 programs on an x86 environment. The steps are as follows: - Install on WSL: - Cross-compilation environment: `sudo apt-get install libc6-dev-arm64-cross gcc-aarch64-linux-gnu` - QEMU emulation environment: `sudo apt-get install qemu qemu-system qemu-user`