Re: [9front] prof profiler changing program result

[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.

Thanks,
Amavect