dwyl/learn-elixir

How to see function calls?

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#116 opened on Feb 19, 2019

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 (0 comments) (4 reactions) (0 assignees)Elixir (1,695 stars) (113 forks)batch import
help wantedquestion

Description

When debuging a function it's often helpful to have a log of all the functions that are being called when running a specific functions. At the moment I'm using a lot of IO.inspect which is good but tedious when a lot of functions are called.

I think the dbg module of Erlang can be used to trace the function calls: http://erlang.org/doc/man/dbg.html

see also https://stackoverflow.com/questions/50364530/elixir-trace-function-call and https://stackoverflow.com/questions/1954894/using-trace-and-dbg-in-erlang/1954980#1954980

Contributor guide

Tech stack
elixir
Domain
developer experiencetooling
Issue type
documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
basic elixirerlang dbg module
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70
Research direction
The issue requests a guide on tracing function calls in Elixir, suggesting the use of Erlang's dbg module. The contributor should explore the dbg documentation and the provided StackOverflow links, then write a tutorial or documentation page for the dwyl/learn elixir repository. The guide should cover how to set up tracing, example usage, and interpreting output, and be placed in an appropriate section of the repo (e.g., a debugging guide).