llvm dev - Jan 2018 - Dumping debug information from BC files

Hello LLVM-World,

I have a question about dumping debug information.

1.) I have compiled an object file with visual studio and debug 
information. Then I used "llvm-readobj -codeview" and dumped the debug
information into a file.
This is working great

2.) I used clang-cl for the same task and finally dumped it again with 
"llvm-readobj".
Worked great too.

3.) Then I used clang-cl to generate a .bc file - but now I'm not able to 
use "llvm-readobj" anymore. Is there any tool available which can dump
this debug information too?

Kind regards
Björn

Als GmbH eingetragen im Handelsregister Bad Homburg v.d.H. HRB 9816, 
USt.ID-Nr. DE 114 165 789
Geschäftsführer: Dr. Hiroshi Nakamura, Dr. Robert Plank, Markus Bode, 
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>
> 3.) Then I used clang-cl to generate a .bc file - but now I'm not able
to
> use "llvm-readobj" anymore. Is there any tool available which can
dump this
> debug information too?
>
​.bc is LLVM bitcode [1], not the usual object file. `llvm-readobj` should
works only on the latter.

​[1] https://llvm.org/docs/BitCodeFormat.html

-- 
Wei-Ren Chen (陳韋任)
Homepage: https://people.cs.nctu.edu.tw/~chenwj
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The debug information is actually still in a different format in the .bc
file, it is LLVM metadata. I think the best reference for it is here:
https://llvm.org/docs/SourceLevelDebugging.html#ccxx-frontend

You can dump it just by disassembling the .bc file to textual IR using
llvm-dis and examining the !DI* metadata nodes. You will have to run the
file through llc to generate an object file to generate actual CodeView or
DWARF.

On Wed, Jan 17, 2018 at 5:09 AM, 陳韋任 via llvm-dev <llvm-dev at
lists.llvm.org>
wrote:
> 3.) Then I used clang-cl to generate a .bc file - but now I'm not able
to
>> use "llvm-readobj" anymore. Is there any tool available which
can dump this
>> debug information too?
>>
>
> ​.bc is LLVM bitcode [1], not the usual object file. `llvm-readobj` should
> works only on the latter.
>
> ​[1] https://llvm.org/docs/BitCodeFormat.html
>
> --
> Wei-Ren Chen (陳韋任)
> Homepage: https://people.cs.nctu.edu.tw/~chenwj
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
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