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bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int
From: |
Eli Zaretskii |
Subject: |
bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int |
Date: |
Mon, 29 Mar 2021 19:59:17 +0300 |
> From: Andrea Corallo <akrl@sdf.org>
> Cc: andrewjmoreton@gmail.com, 46495@debbugs.gnu.org
> Date: Mon, 29 Mar 2021 16:15:56 +0000
>
> > https://sourceware.org/pipermail/gdb-patches/2021-March/177334.html
> >
> > Is that possible?
>
> Well if this is what you observe it certainly can be. There might very
> well be something in how/what libgccjit generates that is causing this
> difference.
David, can you please chime in and help us understand what is going on
here?
> > are we doing something that could affect the
> > prologue of the natively-compiled Lisp code?
>
> I suspect this is a libgccjit thing, without knowing where the
> difference is coming from it's hard to predict if there's a workaround
> we can put in place in the Emacs codebase, but I suspect there's not.
>
> If the generated code is correct I think gdb should recognize it
> improving its unwinder, otherwise if this is a libgccjit bug we should
> open a PR on bugzilla.
GDB's native platform is ELF-based, so its unwinders' support for
COFF-PE format used by MS-Windows is known to be less thorough.
> Perhaps if the case is the later one can try a simpler testcase to
> report it using the test we have in the configure or libgccjit hello
> world [1]. This might help also analysing how this different frame is
> formed.
I think if David doesn't show us the light, my best bet is to
recompile the Lisp code with debug info and see if that resolves the
problem and/or allows us to understand why the code with no debug info
produces these effects.
Thanks.
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Andrea Corallo, 2021/03/26
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/26
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Andrea Corallo, 2021/03/26
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/29
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Andrea Corallo, 2021/03/29
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int,
Eli Zaretskii <=
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, David Malcolm, 2021/03/29
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Andrea Corallo, 2021/03/29
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/30
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/30
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/31
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, David Malcolm, 2021/03/31
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Andrea Corallo, 2021/03/31
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/31
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/31
- bug#46495: 28.0.50; [native-comp] Build fails for 32bit --with-wide-int, Eli Zaretskii, 2021/03/30