Questions & Help>Questions

NIF debugging with GDB/Valgrind

#debugging#nif
solanav

solanav

NIF debugging with GDB/Valgrind

Hello there!

I’m currently trying to find a memory leak in a NIF I have written in C.

I have found some resources as to how to run erlang NIFs with valgrind. I already compiled the Erlang VM and I can now run cerl with -valgrind and -gdb.

Are there any resources on Elixir specific NIF debugging that I’m missing? Is there a setup that has worked for you? Any guide, manual, book, video, etc. would be very helpful.

Thanks!

5 comments
#debugging#nif
8 1351 5

Marked As Solved

akash-akya

akash-akya

Last I tried, I had to modify elixir script.

  • update erl path here to use your compiled cerl
  • pass -valgrind flag here 
set -- "$ERTS_BIN$ERL_EXEC" -valgrind -pa "$SCRIPT_PATH"/../lib/*/ebin $ELIXIR_ERL_OPTIONS $ERL "$@"
3
Post #6

Also Liked

garazdawi

garazdawi

Erlang Core Team

Use a debug emulator. Besides that it is just normal C debugging tactics.

3
Post #3
garazdawi

garazdawi

Erlang Core Team

I don’t know how iex works, so you will have to find someone that does.

I would try to look and see what arguments iex passes to erl when it starts and then pass those to cerl instead.

1
Post #5

Where Next?

View thread on forum (has 5 responses!)
debugging
nif
Home Questions & Help>Questions
#debugging#nif
8 1353 5
Last post

Popular in Questions Top

Brian
Questions & Help>Questions

Import a module from a file into IEX
What is the proper way to load a module from a file in to IEX? In the python world, doing something like this pretty standard: from ....
#iex
35 32139 16
New
gshaw
Questions & Help>Questions

Idiomatic guard clause for checking not nil
What is the idiomatic way of matching for not nil in Elixir? E.g., First way: defp halt_if_not_signed_in(conn, signed_in_account) when...
#guard-clauses
13 43178 3
New
hariharasudhan94
Questions & Help>Questions

What is the best IDE for elixir?
I would like to know what is the best IDE for elixir development?
#code-editors
33 49503 23
New
vac
Questions & Help>Questions

Formatting a string to PEM with headers and line breaks
Hi, I'm quite new in Elixir and I'm trying to format a string to a PEM format. I have the certificate value like MIIDBTCCAe2...... and ...
2 14555 7
New
johnnyicon
Questions & Help>Questions

How do I use the Postgres JSONB / Postgrex JSON extension?
Hi all, I've just started learning Elixir and Phoenix Framework, so please pardon my n00bness at this stage. I'm trying to use Postg...
#ecto
22 17588 9
New
electic
Questions & Help>Questions

DateTime Format to string?
Hi, I am new to Elixir. I am trying to use the DateTime component to insert a date into MySQL however the there seems to be no way to fo...
#datetime
19 24687 16
New
Fl4m3Ph03n1x
Questions & Help>Questions

Learning Elixir, frst impressions ( plz don't kill me ! )
About me? ( if you have nothing better to do than reading about some random guy in the internet :stuck_out_tongue: ) Hello all, this is ...
#learning-elixir
371 25801 61
New
lucidguppy
Questions & Help>Questions

How do I read a file and enumerate its lines
I have a super simple question about elixir - how would I take a file like this foo bar baz and output a new file that enumerates th...
#how-to-question
20 15454 3
New
jc00ke
Questions & Help>Questions

Typespec for map w/both required and optional keys
Expanding on this topic: https://forum.elixirforum.net/t/map-typespec-question/19217 Let’s say I have a map with required and optional k...
#typespecs
27 13396 13
New
romenigld
Questions & Help>Questions

Docker run Error loading shared library libstdc++.so.6 and libgcc_s.so.1
I am trying to run a deploy with docker and I successfully runned with this command: docker build -t romenigld/blog-prod . but when I t...
/phoenix#deployment#docker-compose
30 19932 15
New

Other popular topics Top

senggen
Questions & Help>Questions

How to fix *Bad argument in call to erlang:'++'(<<"xxx/crash.log">>, ".3") in lager_rotator_default:rotate_logfile/2 line 84*
Erlang/OTP 25 [erts-13.2.2] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:1] 15:22:35.803 [error] gen_event {lager_file_backend...
#production#error#log
2 46314 2
New
sergio
Questions & Help>Questions

Updating a field using Ecto one-liner?
In Ruby, I can go: User.find_by(email: "foobar@email.com").update(email: "hello@email.com") How can I do something similar in Elixir? ...
15 14579 3
New
jerry
Questions & Help>Questions

Ecto query using like/ilike in query
Good day to you all. I have been struggling to get a query involving like and ilike to work. Can anyone assist me on this, please? pro...
#ecto
17 16504 10
New
Harrisonl
Questions & Help>Questions

Deploying Elixir into ECS causing many "'global' at node :"xxxxx@10.0.X.X" requested disconnect from node :"xxxx@10.0.X.X" in order to prevent overlapping partitions"
We have an ECS cluster with 4 services, where each task joins a single cluster, via discovery ECS discovery service. Currently when I de...
#deployment
2 85219 3
New
hariharasudhan94
Questions & Help>Questions

What is the best IDE for elixir?
I would like to know what is the best IDE for elixir development?
#code-editors
33 49503 23
New
script
Questions & Help>Questions

Removing spaces and characters from string
If I have a string “1000 cfu/ml” . I want to remove the characters and / and space . So the string is like this "1000" What is the ...
#regex
11 14427 2
New
myronmarston
Questions & Help>Questions

Typespecs - best way to spec keyword lists?
The Elixir Typespec docs show the following syntax for keyword lists in typespecs: # ... | [key: type] # keyword lis...
#dialyzer
52 14258 3
New
rms.mrcs
Questions & Help>Questions

Transform a list into an map with indexes using Enum module
Hi, I need to transform a list of numbers into a map where the keys are the indexes and the values are the original values of the list....
35 32607 9
New
stefanluptak
Questions & Help>Questions

Using VSCode on multiple monitors
Hello everybody, usually, I use a 29" ultra-wide monitor for VSCode which can easily accomodate explorer (files panel) + file with code ...
#vscode#vscode-elixir
7 17615 6
New
Qqwy
Questions & Help>Questions

Updating structs: Map.put vs %Foo{oldfoo | new: value} vs put_in
Original source of discussion: This topic on the Pragmatic Programmers' Functional Web Development with Elixir, OTP, and Phoenix forum. ...
#maps#structs#pipeline#access
115 28410 31
New
Back to top

Questions & Help>Questions

Questions Questions ❯

Latest on Elixir Forum

Elixir Forum ❯

Sponsor Spotlight

AppSignal

Catch errors, track performance, monitor hosts and more.

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Manning

Develop your skills with books, videos, and courses.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

Categories:

Sub Categories:

Forums

Our Sponsors

Dashbit

Build Elixir applications with speed and confidence.

EEF

Supporting innovation across the BEAM ecosystem.

Coders51

We build reliable cloud platforms for business-critical systems.

AppSignal

Catch errors, track performance, monitor hosts and more.

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Manning

Develop your skills with books, videos, and courses.

ElixirCasts

Producing high quality Elixir screencasts since 2017.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

We're in Beta

About us Mission Statement