stdin, stdout, stderr when GUI app is launched from command line
Takashi Yano
takashi.yano@nifty.ne.jp
Thu May 4 21:59:43 GMT 2023
On Thu, 4 May 2023 15:10:03 +0000
"Kacvinsky, Tom" wrote:
> I have a Windows GUI app that I have set to run with Windows Application Verifier.
> In particular, I have App verifier set to trigger on invalid handle exceptions (code is
> 0xC0000008). When the application is run from the Cygwin console, it faults with
> an invalid handle three times. I can continue past them in windbg (or gdb for that
> matter) and the application launches. I think it is curious the invalid handle exception
> occurs three times - is it stdin, stdout and stderr that App Verifier thinks are invalid
> handles? My hunch is yes, they are.
>
> I did notice that if I run the GUI use run.exe, as in "run guiapp.exe", the application
> launches with no invalid handle exceptions.
>
> I am using this version of Cygwin 64
>
> vapkay@US05117NB ~ $ cygcheck -V
> cygcheck (cygwin) 3.1.7
>
> But it also happens with 3.4.6
>
> Is this to be expected with a GUI app when run under a Cygwin console? I've never
> seen it until I ran with App Verifier. The GUI application is a Qt app. I check the Qt
> version we're using for use of and I don't see anything in the WinMain what would
> have to do with reading/writing to the standard IO file descriptors.
>
> Any ideas?
I cannot reproduce your problem with cygwin 3.4.6.
Could you please provide detailed steps?
--
Takashi Yano <takashi.yano@nifty.ne.jp>
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