Re: [HACKERS] Win32 WEXITSTATUS too

I have applied a modified version of this patch. We now print the
exception value in hex, and give a URL where the exception can be looked
up.

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Bruce Momjian wrote:
>
> I did some research on this, and found a nice Win32 list of STATUS_
> error values. Looking at the list, I think the non-exit() return values
> are much larger than just the second high bit.
>
> I am proposing the attached patch, which basically has all system()
> return values < 0x100 as exit() calls, and everything above that as a
> signal exits. I also think it is too risky to backpatch to 8.2.X.
>
> Also, should we print Win32 WTERMSIG() values as hex because they are so
> large? I have added that to the patch.
>
> ---------------------------------------------------------------------------
>
> ITAGAKI Takahiro wrote:
> >
> > Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >
> > > server process exited with exit code -1073741819
> > > from what I suspect is really the equivalent of a SIGSEGV trap,
> > > ie, attempted access to already-deallocated memory. My calculator
> > > says the above is equivalent to hex C0000005, and I say that this
> > > makes it pretty clear that *some* parts of Windows put flag bits into
> > > the process exit code. Anyone want to run down what we should really
> > > be using instead of the above macros?
> >
> > C0000005 equals to EXCEPTION_ACCESS_VIOLATION. The value returned by
> > GetExceptionCode() seems to be the exit code in unhandeled exception cases.
> >
> > AFAICS, all EXCEPTION_xxx (or STATUS_xxx) values are defined as 0xCxxxxxxx.
> > I think we can use the second high bit to distinguish exit by exception
> > from normal exits.
> >
> > #define WEXITSTATUS(w) ((int) ((w) & 0x40000000))
> > #define WIFEXITED(w) ((w) & 0x40000000) == 0)
> > #define WIFSIGNALED(w) ((w) & 0x40000000) != 0)
> > #define WTERMSIG(w) (w) // or ((w) & 0x3FFFFFFF)
> >
> > However, it comes from reverse engineering of the headers of Windows.
> > I cannot find any official documentation.
> >
> > Regards,
> > ---
> > ITAGAKI Takahiro
> > NTT Open Source Software Center
> >
> >
> >
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> --
> Bruce Momjian bruce(at)momjian(dot)us
> EnterpriseDB http://www.enterprisedb.com
>
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--
Bruce Momjian bruce(at)momjian(dot)us
EnterpriseDB http://www.enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +