Re: CTRL_CLOSE_EVENT gives Application error for gnuplot.exe for windows using the wxt terminal

[Tatsuro M. <tma...@ya...>]

Hello

Sorry the patch is not sufficeint for the purpose to trap CTRL + C.

I have carried out the test.

i=0; load 'rereadtest.gp'

# rereadtest.gp
i=i+1
plot sin(x+i*0.1/pi);
reread
# end of rereadtest.gp

On the cygwin version gnuplot, thw CTLC + C on the command window works as expected.
(I can go back the gnuplot prompt.)

On the other hand, the modified gnuplot.exe for windows CTRL + C does not make gnuplot back to the
prompt.

I will consider the further. 

Regards

Tatsuro


--- Tatsuro MATSUOKA  wrote:

> Hello
> 
> I have tried to look this phenomena in detail.
> However it is principally difficult to trace the issue by the gdb.
> And on the gdb, application error itself does  not appear.
> 
> Therefore I use the SetConsoleCtrlHandler and CtrlHandler functions in the win32api.
> 
> The issue is easy to fix to use the above.
> 
> 
> I have also retied to fix ctrc+c issue on gnuplot.exe on windows.
> 
> It seem that setjmp+longjmp routine does not work in the interrupt routine on windows.
> In windows console program, use of the SetConsoleCtrlHandler and CtrlHandler functions seem to
> be
> usual way to trap CTRL + C.
> 
> In the trapping routine, I have copied SETJMP in gnu_main( for the windows case).
> However, I cannot make the prompt 'gnuplot> ' to be appeared.  But I found that the pressing the
> return key makes the prompt to be appeared. I have write that temporal treatment.
> 
> If press the CTRL + C at gnuplot prompt,
> 
> gnuplot>
> CTRL+C detected. Press return to back to the prompt ->
> 
> If press the return, I can back to the gnuplot prompt
> The total appearances are 
> 
> gnuplot>
> CTRL+C detected. Press return to back to the prompt ->
> gnuplot>
> 
> I have attached the patch.
> 
> Comments and suggestions are welcome.
> 
> For the wnuplot, the way I have shown cannot be used.
> Perhaps, the GUI program for windows, different way should be considered.
> 
> Regards
> 
> Tatsuro
> 
> --- Tatsuro MATSUOKA  wrote:
> 
> > Hello
> > 
> > The problem is completely different from the original issue.
> > Therefore I post the issue as a different one.
> > 
> > 
> > Explanation of CTRL_CLOSE_EVENT
> > 
> > CTRL_CLOSE_EVENT : Close the window consoleby clicking on the x at the upper right corner.
> > 
> > 
> > I have confirmed the same phenomena at gnuplot 4.4.0 on the gnuplot official site.
> > 
> > I also confirmed the same pehnomena at gnuplot 4.4.0 for octave-mingw32 bundled with
> > octave-3.2.4
> > mingw32 which is prepared by Benjamin.
> > 
> > Perhaps it is not specific to the current my build system.
> > 
> > One of the way to avoid this issue is to trap the CTRL_CLOSE_EVENT using win32api and exit
> > gnuplot
> > using the function (at_exit? ) used inside gnuplot.
> > 
> > If I implement this, I will write the routine in the plot.c
> > 
> > However I will look at what is happing further.
> > 
> > Regards
> > 
> > Tatsuro 
> > 
> > 
> > 
> > ***************************************************
> > --- Tatsuro MATSUOKA  wrote:
> > 
> > > This is well known issue for windows console applications.
> > > The octave also has the similar issue.
> > 
> > Seeing phenomena in detail, the issue pointed is not the same as that of the octave for
> windows.
> > 
> > Please try,
> > 
> > set term win
> > plot x
> > 
> > and quit gnuplot by clicking on the x at the upper right corner.
> > In my case, gnuplot terminates normally.
> > 
> > set term emf 
> > set out 'test.emf'
> > plot x
> > 
> > and quit gnuplot by clicking on the x at the upper right corner.
> > In this case, gnuplot also terminates normally.
> > (test.emf was correctly generated so that gnuplot terminated with normal quit process.)
> > 
> > 
> > This phenomenon seems to be specific to the wxt terminal + gnuplot.exe.
> > 
> > I have to see the code of the wxt terminal related codes so that it will take time to correct
> > it.
> > 
> > Regards
> > 
> > Tatsuro
> >  
> > 
> > > 
> > > However, to avoid this issue one have to trap CTRL_CLOSE_EVENT (that is you described as
> > > clicking on
> > > the x at the upper right corner) using SetConsoleCtrlHandler function, which is the win32api
> > > function.
> > > 
> > > However, I have tried to trap CTRL+C by this api function to overcome the SIGINT issue for
> > > gnuplot for
> > > windows, the results was not successful.  
> > > 
> > > I can try to fix CTRL_CLOSE_EVENT issue but I do not have any confidence to avoid to it.
> > > 
> > > One possible way to treat the issue in tricky way is to execute gnuplot.exe on the cmd.exe
> > > wrapper
> > > application like 'ckw'.
> > > 
> > > I am using the Japanese software the ckw downloaded from 
> > > http://sites.google.com/site/craftware/ckw/download/ckw-0.8.10-mod4-20100508.zip
> > > 
> > > The reference is translated by me.
> > > http://www.tatsuromatsuoka.com/ckw/Reference-en.txt
> > > 
> > > Known bug for the ckw-0.8.10-mod4-20100508.  
> > > If the ckw command is execute by shortcut, it fails to hide the cmd console.
> > > To avoid this, you execute ckw using the start command in the cmd.
> > >   cmd /c start ckw (options)
> > > 
> > > Please also see the help of start command by typing 'help start' at cmd prompt.
> > > 
> > > Regards
> > > 
> > > Tatsuro
> > > 
> > > 
> > > 
> > > --- Petr Mikulik wrote:
> > > 
> > > > > I've tried the latest distribution from
> > > > > http://www.tatsuromatsuoka.com/gnuplot/Eng/winbin/, and the fix is
> > > > > confirmed!
> > > > > 
> > > > > However, I've found something else. Steps to reproduce:
> > > > > 
> > > > > 1) Start gnuplot.exe - either from an Explorer window or from the console
> > > > > 2) Plot anything - for example 'plot x'
> > > > > 3) Close the window, not by typing exit, but by clicking on the x at
> > > > > the upper right corner
> > > > > 4) Observe the error window: 'Application error: The instruction at
> > > > > "0x00000000" referenced memory at "0x00000000". The memory could not
> > > > > be "read".'
> > > > > 
> > > > > It's always 0x00000000, and it's 100% reproducible on both Windows XP
> > > > > (32 bit) machines I've tried.
> > > > > 
> > > > > Notes: this happens only with gnuplot.exe, but not with wgnuplot.exe.
> > > > > Also, this doesn't occur if you change the terminal to "windows"
> > > > > instead of "wxt".
> > > > 
> > > > I set wine to "winxp" and gnuplot.exe works correctl
> > 
> > --------------------------------------
> > Learn more about breast cancer - Pink Ribbon Campaign 2010
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> 
> 
> --------------------------------------
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