Re: [Libunwind-devel] using libunwind on Windows

[Vincent Torri]

Hello

unfortunately, this patch can not apply anymore, due to internal changes in libunwind.

also, i've seen some use of the long type (in unwind.h for example), which is always 32 bits long on Windows, even on Windows 64 bit. I don't know if it is a problem or not

Also, now, in src/ there are some OS specific files (about shared mem and ELF). There are shared mem API on Windows, but i don't know what i would do with ELF stuff...

I have added some infra in the autotools for Windows, but with no windows source code, it's a bit useless...

Vincent Torri

On Tue, Mar 15, 2016 at 9:44 PM, Martin Hundebøll <address@hidden> wrote:

Hi Vincent / libunwind dev

I came across this patch and I propose it being included in upstream libunwind:
https://github.com/Alexpux/MINGW-packages/blob/master/mingw-w64-libunwind-svn/0001-libunwind-add-support-for-mingw-w64.patch

Thanks,
Martin

On 2015-12-13 09:29, Vincent Torri wrote:

Hello

I am writing a small valgrind-like program on Windows, to detect
memleak and some errors that valgrind's memcheck identifies.

Currently, for the backtrace, I use the Windows API if compiled with
vc++, and libbfd if compiled with gcc (mingw-w64). libbfd works well
(i get file, function ad line number that I want), but the licence is
a problem (GPL v3).

libdwarf seems big, libunwind seems smaller, and according to the
documentation, libunwind can manage DWARF format

If I'm not mistaken, the GNU linker provides debugging informations in
the DWARF format on Windows.

I have 2 questions:

1) Do you think that libunwind could indeed provide backtrace from
programs/libraries linked with the GNU linker on Windows ?

2) if yes, as i am quite interested to have libunwind on Windows,
compiling it with MSYS/mingw-w64 (not vc++), where should I start, and
which files should I look first ?

Note that I would like to provide patches upstream, not to fork libunwind.

thank you

Vincent Torri

--
Kind Regards,
Martin Hundebøll
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