[cfe-dev] debug_frame section not generated for Windows 64bit

[Jayvee Neumann via cfe-dev]

Hi Reid,

your suggestion is not a solution to the problem I have. I still want to
use SEH on 64bit Windows because it is, as you also pointed out, required
by the ABI. I need a .debug_frame or .eh_frame section in addition to the
SEH .pdata section. I am aware that the exception handling data would be
redundant. Information about e.g. the CFA, which is required by some
DWARF-expressions/locations, would not be redundant though.

Is there a way to request both, a .pdata section for SEH style exceptions
and a .debug_frame sections, in the same or a similar way to MinGW-w64?

Best Regards
Jayvee

2018-03-23 0:22 GMT+01:00 Reid Kleckner <rnk at google.com>:

> Clang defaults to emitting SEH unwind information on Win64, since it is
> required by the ABI. DWARF EH tables would be redundant, but you can
> request them with -fdwarf-exceptions.
>
>
> On Thu, Mar 22, 2018 at 4:05 PM Jayvee Neumann via cfe-dev <
> cfe-dev at lists.llvm.org> wrote:
>
>> Hi togehter,
>>
>> I am currently switching from MinGW-w64 to clang. I am running into a
>> problem with the debug information generated by clang, though. When
>> building with mingw, there will always be an .eh_frame or a .debug_frame
>> section. This is also true for 64bit windows. When I build the same files
>> with clang for the target triple "x86_64-pc-windows-gnu" neither a
>> .debug_frame nor an .eh_frame section is generated.
>>
>> I there a way for me to explicitly specify via command line that such a
>> section shall be generated?
>> If not, is there a way to change the llvm/clang source code in a way such
>> that these sections will be generated for the specified target?
>>
>> Best Regards,
>> Jayvee
>> _______________________________________________
>> cfe-dev mailing list
>> cfe-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>>
>
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