[Bug demangler/102851] New: Failure to demangle c++ symbol

[Bug demangler/102851] New: Failure to demangle c++ symbol

[hasse.christoph at cern dot ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102851

            Bug ID: 102851
           Summary: Failure to demangle c++ symbol
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: demangler
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hasse.christoph at cern dot ch
  Target Milestone: ---

As far as I now understand c++filt uses libiberty to demangle which is part of
GCC, so filing this bug here.

Originally observed in perf, but reproduced with c++filt Version 2.36.1

Symbol: 
_ZZNK5Gaudi10Functional7details16MultiTransformerIFSt5tupleIJSt6vectorIN4LHCb13VPFullClusterESaIS6_EESt5arrayIjLm53EEEERK12EventContextRKNS5_8RawEventERK4DeVPENS0_6Traits4use_IJNS5_7DetDesc21useConditionHandleForIJSI_EEENSM_11BaseClass_tINSO_23ConditionAccessorHolderI10FixTESPathINS_9AlgorithmEEEEEEEEELb0EE7executeESE_ENKUlDpRT_E_clIJK21DataObjectWriteHandleIS8_S8_EKS15_ISA_SA_EEEEDaS12_

`llvm-cxxfilt` gives: 
auto
Gaudi::Functional::details::MultiTransformer<std::tuple<std::vector<LHCb::VPFullCluster,
std::allocator<LHCb::VPFullCluster> >, std::array<unsigned int, 53ul> >
(EventContext const&, LHCb::RawEvent const&, DeVP const&),
Gaudi::Functional::Traits::use_<LHCb::DetDesc::useConditionHandleFor<DeVP>,
Gaudi::Functional::Traits::BaseClass_t<LHCb::DetDesc::ConditionAccessorHolder<FixTESPath<Gaudi::Algorithm>
> > >, false>::execute(EventContext const&)
const::'lambda'(auto&...)::operator()<DataObjectWriteHandle<std::vector<LHCb::VPFullCluster,
std::allocator<LHCb::VPFullCluster> >, std::vector<LHCb::VPFullCluster,
std::allocator<LHCb::VPFullCluster> > > const,
DataObjectWriteHandle<std::array<unsigned int, 53ul>, std::array<unsigned int,
53ul> > const>(auto&...) const

[Bug demangler/102851] Failure to demangle c++ symbol

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102851

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Do you have the C++ preprocessed source that produces this mangled symbol?

The lambda part might be causing the difference between LLVM and GCC and such.

[Bug demangler/102851] Failure to demangle c++ symbol

[hasse.christoph at cern dot ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102851

--- Comment #2 from hasse.christoph at cern dot ch ---
Created attachment 51661
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51661&action=edit
Preprocessed source

Compile with g++ -O3 -DNDEBUG -g -o tmp.o -c preprocessed.cpp 

objdump -d -C tmp.o | less 

will show the non demangled symbol

[Bug demangler/102851] Failure to demangle c++ symbol

[ppalka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102851

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE
                 CC|                            |ppalka at gcc dot gnu.org

--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
dup of PR97091 I think, which is about demangling a variadic auto lambda

*** This bug has been marked as a duplicate of bug 97091 ***