[Bug binutils/17541] addr2line: function names in anonymous namespaces are incorrectly reported.

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https://sourceware.org/bugzilla/show_bug.cgi?id=17541

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=e00e81980c70659d0efe686b31a55db5faaa91f9

commit e00e81980c70659d0efe686b31a55db5faaa91f9
Author: Alan Modra <address@hidden>
Date:   Wed Dec 10 09:51:56 2014 +1030

    Don't return DW_AT_name for function name in C++

    DW_AT_name for functions typically just contains the base function
    name, so lacks namespace, class and parameter information.  It would
    be possible to extract all these from the DWARF, but at a considerable
    complication of the parser in dwarf2.c, and then you'd need to mangle
    it all together.  Much simpler is to look up the actual symbol.  This
    patch does that, avoiding the extra symbol lookup when the language
    doesn't do name mangling.

        PR 17541
        * dwarf2.c (struct comp_unit): Add "lang".
        (non_mangled): New function.
        (struct funcinfo): Add "is_linkage".  Reorder for better packing.
        Make "name" a const char*.
        (lookup_address_in_function_table): Delete functionname_ptr param.
        (find_abstract_instance_name): Add is_linkage param.  Set if we
        have DW_AT_linkage_name or non_mangled DW_AT_name.
        (scan_unit_for_symbols): Similarly set func->is_linkage.
        (parse_comp_unit): Stash DW_AT_language.
        (comp_unit_find_nearest_line): Replace functionname_ptr param
        with function_ptr param.
        (_bfd_dwarf2_find_nearest_line): Adjust above calls.  Set
        functionname_ptr from function->name.  Call _bfd_elf_find_function
        to retrieve symbol for function if not linkage name.
        (_bfd_elf_find_function): Add bfd_target_elf_flavour test, moved from..
        * elf.c (elf_find_function): ..here.
        (_bfd_elf_find_nearest_line): Adjust calls.
        * elf-bfd.h (_bfd_elf_find_function): Declare.

-----------------------------------------------------------------------

Summary of changes:
 bfd/ChangeLog |   22 ++++++
 bfd/dwarf2.c  |  228 +++++++++++++++++++++++++++++++++++++++++++++++++--------
 bfd/elf-bfd.h |    2 +
 bfd/elf.c     |  130 ++------------------------------
 4 files changed, 229 insertions(+), 153 deletions(-)

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