dwyl/learn-elixir

How to see function calls?

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#116 opened on Feb 19, 2019

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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

Research direction
Investigate the Erlang dbg module and provide a step by step guide on tracing function calls in Elixir, including setup, common usage patterns, and examples.
Tech stack
elixir
Domain
developer experiencedocumentation
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
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Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Elixir
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
95