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Re: [creduce-dev] C-Reduce Script for an OpenGL program

23.11.2018, 15:22, "Paul Keir" <paul.keir@uws.ac.uk>:
> Hi everyone,
> I'm using C-Reduce with an OpenGL program which displays unwanted visual artifacts on some of our workstations. It takes around 30 seconds to compile the relevant preprocessed single compilation unit C++ file (courtesy of cotire). Things appear to run smoothly for the first half hour. Upon returning about 20 hours later though, I see progress around 15% and the terminal has around 20 messages indicating timeout of C-Reduce has kicked in. I can also see that there are 10s of instances of our application still running.

Well, you start ./a.out in background and neither wait, nor kill it. Of course it will continue running afterwards.

> I have included our script below. Basically each a.out executable takes a string argument (the current directory basename) which defines the window name - one second is given to find that window by name. It is then activated, to allow a screenshot to be taken. This is compared with the expected "golden" screenshot, before the window is killed.
> I like C-Reduce a lot, though I suspect it isn't ideal for graphical programs. In any case, I'm keen to learn what I can from it.
> #!/bin/bash
> FILE=gui_CXX_unity_preprocessed.cxx
> GUI_ROOT=$HOME/project/gui
> APP_NAME=`basename $PWD`
> function visual_compare()
> {
>   ./a.out $APP_NAME >/dev/null 2>&1 &
>   WINDOW=`timeout 1s xdotool search --sync --name "$APP_NAME"`
>   if [ -z "$WINDOW" ]
>   then
>     return
>   fi
>   xdotool windowactivate $WINDOW
>   import -screen -window $WINDOW grab.rgba
>   xdotool windowkill $WINDOW
>   cmp -s grab.rgba $GUI_ROOT/golden.rgba
> }
> g++ -std=c++17 ${FILE} -lSDL2 -lSDL2_image -lSDL2_ttf -lGLEW -lGL -L -pthread >/dev/null 2>&1 &&\
> visual_compare && exit $DIFFERENCE
> Thanks for your time,
> Paul
> Please consider the environment and think before you print.
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