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bug#50453: 27.2; Portable dumper broken on MSW
From: |
Eli Zaretskii |
Subject: |
bug#50453: 27.2; Portable dumper broken on MSW |
Date: |
Thu, 09 Sep 2021 19:24:43 +0300 |
> From: Po Lu <luangruo@yahoo.com>
> Cc: 50453@debbugs.gnu.org
> Date: Thu, 09 Sep 2021 20:40:49 +0800
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> > Can you put a breakpoint in dump_map_file_w32 and verify that it is
> > called? If it is indeed called, can you step through it and see if it
> > fails, and if so, how?
>
> I tried a few times, but I gave up because Windows kept crashing.
>
> However, the portable dumper seems to rely on a function named
> `MapViewOfFileEx' at line 4499 of pdumper.c.
>
> According to the documentation, the function is only available on
> Windows XP or later; this seems to be a convincing explanation for the
> failure.
The current MS documentation is "inaccurate", to say the least: they
consistently removed from it any references to versions of Windows
before Windows 2000/XP.
I use this instead:
http://winapi.freetechsecrets.com/win32/WIN32MapViewOfFileEx.htm
and it says this is available on Windows 9X, but there's a special
requirement regarding the flags, and I see that we don't fulfill that
requirement.
But I don't know how to proceed from here: you are probably unable to
build Emacs for Windows 98, and I don't know how else to ask you to
try some modifications of the current code. Any ideas?
> Specifically, I'm referring to the "Requirements" section of:
> https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffileex,
> which states:
>
> Minimum supported client: Windows XP [desktop apps only]
That's a lie.
- bug#50453: 27.2; Portable dumper broken on MSW, (continued)
- bug#50453: 27.2; Portable dumper broken on MSW, Po Lu, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Po Lu, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Eli Zaretskii, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Po Lu, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Po Lu, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Eli Zaretskii, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Po Lu, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Eli Zaretskii, 2021/09/10
- bug#50453: 27.2; Portable dumper broken on MSW, Po Lu, 2021/09/10
- bug#50453: 27.2; Portable dumper broken on MSW, Eli Zaretskii, 2021/09/11
- bug#50453: 27.2; Portable dumper broken on MSW,
Eli Zaretskii <=
- bug#50453: 27.2; Portable dumper broken on MSW, Po Lu, 2021/09/09
- bug#50453: 27.2; Portable dumper broken on MSW, Eli Zaretskii, 2021/09/09