[PATCH] D95916: DebugInfo/Symbolize: Allow STT_NOTYPE/STT_GNU_IFUNC symbols for .symtab symbolization
Fangrui Song via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Mar 16 10:24:47 PDT 2021
MaskRay added a comment.
In D95916#2628775 <https://reviews.llvm.org/D95916#2628775>, @luismarques wrote:
> In D95916#2627640 <https://reviews.llvm.org/D95916#2627640>, @MaskRay wrote:
>
>> With -g or -fasynchronous-unwind-tables, .debug_frame/.eh_frame has a label below `_start`. Its address is `_start + 2` and its name is empty.
>> Neither addr2line nor llvm-symbolizer skips such a symbol with empty name.
>
> But D98669 <https://reviews.llvm.org/D98669> doesn't fix my original test case...?
Could you recheck? (I am quite certain it fixes your case)
addr2line PR: https://sourceware.org/bugzilla/show_bug.cgi?id=27585
Without that patch (my fllvm-symbolizer is an alias)
% fllvm-symbolizer -fe a.out $(nm a.out | awk '/ _start/{printf "%#x",strtonum("0x"$1)+4}')
a.c:0:0
With that patch
% fllvm-symbolizer -fe a.out $(nm a.out | awk '/ _start/{printf "%#x",strtonum("0x"$1)+4}')
_start
??:0:0
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D95916/new/
https://reviews.llvm.org/D95916
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