[Bug symtab/29381] [gdb, debug-types, debug-names] read.h:309: internal-error: set_length: Assertion `m_length == length' failed.

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29381

--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #0)
> When running test-case gdb.cp/cpexprs-debug-types/cpexprs-debug-types with
> target board cc-with-debug-names on a system with gcc 12.1.1 (defaulting to
> dwarf 5), I run into:
> ...
> (gdb) file
> /data/vries/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.cp/cpexprs-
> debug-types/cpexprs-debug-types^M
> Reading symbols from
> /data/vries/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.cp/cpexprs-
> debug-types/cpexprs-debug-types...^M
> warning: Section .debug_aranges in
> /data/vries/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.cp/cpexprs-
> debug-types/cpexprs-debug-types has duplicate debug_info_offset 0x0,
> ignoring .debug_aranges.^M
> /data/vries/gdb_versions/devel/src/gdb/dwarf2/read.h:309: internal-error:
> set_length: Assertion `m_length == length' failed.^M
> A problem internal to GDB has been detected,^M
> further debugging may prove unreliable.^M
> ----- Backtrace -----^M
> ERROR: Couldn't load cpexprs-debug-types into GDB (GDB internal error).
> ... 
> 
> The problem is three-fold.
> 
> 1.
> The .debug_names index is rejected in dwarf2_read_debug_names because:
> ...
>   if (map->tu_count != 0)
>     {
>       /* We can only handle a single .debug_types when we have an
>          index.  */
>       if (per_bfd->types.size () != 1)
>         return false;
> ...
> there are TUs so the tu_count is > 0 but there's no .debug_types section
> (dwarf 5 puts the TUs in the .debug_info section) so the
> "per_bfd->types.size () != 1" test fails.
> 

Filed as PR29385.

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