Using separate debug info files with Windows DLLs

[Eli Zaretskii]

> From: Tom Tromey <tom@tromey.com>
> Cc: gdb@sourceware.org
> Date: Sun, 19 Aug 2018 10:40:34 -0600
> 
> >>>>> "Eli" == Eli Zaretskii <eliz@gnu.org> writes:
> 
> Eli> Does the "debug link" method work with Windows DLLs produces by MinGW
> Eli> GCC and GNU Binutils?
> 
> I think so.
> 
> Eli> The "Separate Debug Files" node of the GDB manual talks only about
> Eli> executables, and doesn't mention shared libraries.  If those methods
> Eli> are supposed to work with shared libraries in general, and Windows
> Eli> DLLs in particular, then I wonder (a) would the Windows loader live in
> Eli> peace with the additional .gnu_debuglink section that needs to be put
> Eli> there, and (b) when will GDB load the debug info using this method?
> 
> I don't know the answer to (a), but for (b), as far as I know,
> coff_symfile_read is used for both executables and libraries; and at the
> end of coff_symfile_read it has code to read the debug link and find the
> separate debug file.  This is done if the main objfile doesn't have any
> debug info:
> 
>   /* Try to add separate debug file if no symbols table found.   */
>   if (!objfile_has_partial_symbols (objfile))
>     {
> [...]

Thanks, I will try to use this some time.

> I wonder if the build-id approach could be extended to COFF somehow.

That would be nice, yes.