Re: [9front] prof profiler changing program result

[sirjofri <sirjofri+ml-9front@sirjofri.de>]

13.12.2023 04:30:51 Amavect <amavect@gmail.com>:

> On Sat, Dec 9, 2023 at 12:30 PM sirjofri <sirjofri+ml-9front@sirjofri.de> wrote:
>> today I did an implementation of mandelbrot and learned to use prof to profile my program.
>> I noticed that the mandelbrot result is different when linked using -p.
>> Instead of the nice mandelbrot image I get a circle (but still with lots of details).
>> Funnily enough, julia seems to work better.
> You have uninitialized variables.
> I guess kencc doesn't warn if you don't fully initialize a struct.
> Acid showed me that SetParams params was initialized differently by
> the time it reaches generate().
> The .julia field gets an uninitialized value of 0 without -p, and an
> uninitialized value of 1 with -p.
> After setting a zero struct initializer {0}, the mandelbrot generates correctly.
> After setting a struct initializer {1}, the mandelbrot generates
> incorrectly in the same way.

Good catch, I didn't think about that.

I fixed my program now and it works, thank you for pointing it out.

sirjofri