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sam

GCC 14 is still in development, but it has a wonderful new feature in its static analyzer (-fanalyzer).

It can now draw beautiful Unicode diagrams showing exactly how you went out-of-bounds.

See inbox.sourceware.org/gcc-patch too.

Thank you to the wonderful David Malcolm for implementing this - who also does a tonne of work with mentoring for GCC's GSoC programme, and working on docs to help new people get into GCC: gcc-newbies-guide.readthedocs..

@gnutools

GCC command invoked as 'gcc-14 /tmp/foo.c -o /tmp/foo -fanalyzer'. The source file, /tmp/foo.c, contains a trivial out-of-bounds read. The analyzer detects this and provides a colorful diagram illustrating where the out-of-bounds access occurs.
11 Jul 2023 at 20:27 | Open on social.treehouse.systems
13 comments
soft bunny 🐰
Rob
Mya
wakame

@thesamesam @gnutools

For all the people who still held any illusions that they are good at writing C:

"Look, human. This is where your weird human brain decided to introduce a fence-post error again.
Here, I have drawn you a picture. Sorry, crayons were out." :blobcatgiggle:​

11 Jul 2023 at 20:46 | Open on tech.lgbt
NixFREAK -

@thesamesam @gnutools oh awesome ... can't wait to try this out with gdb.

11 Jul 2023 at 20:52 | Open on hackers.town
David Zaslavsky
luna

@thesamesam this makes me C the issue quite clearly

11 Jul 2023 at 21:16 | Open on social.linux.pizza
imdat celeste of Tau Ceti :v_nb: :v_tg: [NaG • NaB]
Alexis :verifiedtransbian:
Rep. Eric Gallager (no "h"!)

@thesamesam @gnutools That's David Malcolm's work! I wish we could clone him!

12 Jul 2023 at 7:23 | Open on social.treehouse.systems
sam

@egallager @gnutools A genuinely outstanding asset to GCC! I meant to name him in the post, and I'll edit it to now as well.

12 Jul 2023 at 7:38 | Open on social.treehouse.systems
sam

I should also say that if you want a distribution that makes it very easy to have multiple GCCs installed at once and is recognised for its high-quality toolchain maintenance, you know where we are 😉

#gentoo

12 Jul 2023 at 7:47 | Open on social.treehouse.systems
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