llvm dev - May 2014 - [LLVMdev] DWARF unmangled subprog name (DW_AT_name)

Hi,

I am looking for a way to get unmangled subprogram names from a
DWARFContext. The name I want is available in the attribute `DW_AT_name`
[1], but as far as I can tell this is only returned as a fallback in
`DWARFDebugInfoEntryMinimal::getSubroutineName` when the linkage name is
not available [2].

If this is not currently possible, is there any interest in adding such
access to the public DebugInfo API? Perhaps with an additional
"UnmangledName" option in `DILineInfoSpecifier`.

Thanks,
Isaiah

[1]: for example:

0x0001bb00:   DW_TAG_subprogram [2]
                DW_AT_MIPS_linkage_name [DW_FORM_strp]  (
.debug_str[0x00007934] = "julia_vcat4473")
                DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000913]
"vcat")


[2]
https://github.com/llvm-mirror/llvm/blob/master/lib/DebugInfo/DWARFDebugInfoEntry.cpp#L279-L286
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On Tue, May 6, 2014 at 8:09 PM, Isaiah Norton <isaiah.norton at gmail.com>
wrote:
> Hi,
>
> I am looking for a way to get unmangled subprogram names from a
> DWARFContext. The name I want is available in the attribute `DW_AT_name`
> [1], but as far as I can tell this is only returned as a fallback in
> `DWARFDebugInfoEntryMinimal::getSubroutineName` when the linkage name is
not
> available [2].
>
> If this is not currently possible, is there any interest in adding such
> access to the public DebugInfo API? Perhaps with an additional
> "UnmangledName" option in `DILineInfoSpecifier`.
>
> Thanks,
> Isaiah
>
> [1]: for example:
>
> 0x0001bb00:   DW_TAG_subprogram [2]
>                 DW_AT_MIPS_linkage_name [DW_FORM_strp]  (
> .debug_str[0x00007934] = "julia_vcat4473")
>                 DW_AT_name [DW_FORM_strp]       ( .debug_str[0x00000913]
> "vcat")
>
>
> [2]
>
https://github.com/llvm-mirror/llvm/blob/master/lib/DebugInfo/DWARFDebugInfoEntry.cpp#L279-L286
>
>
If you just want the DW_AT_name you should be able to iterate over the
DIEs and pull out the DW_AT_name attribute from all of the subprogram
DIEs. Is there some other use that you're looking for? I'm not quite
sure what you're trying to accomplish.

-eric

That doesn't seem possible with the public API or am I mistaking?


On Wed, May 7, 2014 at 12:13 AM, Eric Christopher <echristo at
gmail.com>wrote:
> On Tue, May 6, 2014 at 8:09 PM, Isaiah Norton <isaiah.norton at
gmail.com>
> wrote:
> > Hi,
> >
> > I am looking for a way to get unmangled subprogram names from a
> > DWARFContext. The name I want is available in the attribute
`DW_AT_name`
> > [1], but as far as I can tell this is only returned as a fallback in
> > `DWARFDebugInfoEntryMinimal::getSubroutineName` when the linkage name
is
> not
> > available [2].
> >
> > If this is not currently possible, is there any interest in adding
such
> > access to the public DebugInfo API? Perhaps with an additional
> > "UnmangledName" option in `DILineInfoSpecifier`.
> >
> > Thanks,
> > Isaiah
> >
> > [1]: for example:
> >
> > 0x0001bb00:   DW_TAG_subprogram [2]
> >                 DW_AT_MIPS_linkage_name [DW_FORM_strp]  (
> > .debug_str[0x00007934] = "julia_vcat4473")
> >                 DW_AT_name [DW_FORM_strp]       (
.debug_str[0x00000913]
> > > "vcat")
> >
> >
> > [2]
> >
>
https://github.com/llvm-mirror/llvm/blob/master/lib/DebugInfo/DWARFDebugInfoEntry.cpp#L279-L286
> >
> >
>
> If you just want the DW_AT_name you should be able to iterate over the
> DIEs and pull out the DW_AT_name attribute from all of the subprogram
> DIEs. Is there some other use that you're looking for? I'm not
quite
> sure what you're trying to accomplish.
>
> -eric
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
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