[Bug 25920] winedbg does not work under clang

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=25920

--- Comment #3 from Austin English <austinenglish at gmail.com> 2011-03-21 15:18:19 CDT ---
(In reply to comment #2)
> 1/ confirming crash
> 2/ however, clang generates bogus dwarf information:
> 
> (compilation with -O2, clang version 2.8)
> ----8<---
> [eric:~/work/output-wine/wine-clang]$ dwarfdump dlls/kernel32/kernel32.dll.so
> <<....>>
> .debug_line: line number info for a single cu
> dwarfdump ERROR:  dwarf_srclines:  DW_DLE_ATTR_FORM_BAD (114)
> <<....>>
> ---------
> 3/ seems confirmed by some web searches (on clang 2.8)
> see for example:
> http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110221/117178.html
> 
> 4/ looking at the hexdump of the section show that the .debug_line section
> doesn't even contain its header
> 
> 5/ I'll send a patch to protect dbghelp against bogus .debug_line sections in
> dwarf files. winedbg now generates the correct backtrace (even if they are a
> tons of duplicate symbols info. some of them are harmless, some others may
> require some more care. that would require another bug report.

Thanks! I filed bug 26509 for that.

> 6/ I didn't test for the yet to come 2.9 version (or its RC), but definitively
> a clang bug.

That sounds a bit like http://llvm.org/bugs/show_bug.cgi?id=9268

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