https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67696
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ccoutant at gmail dot com,
| |ian at airs dot com,
| |jason at gcc dot gnu.org,
| |pault at gcc dot gnu.org,
| |vries at gcc dot gnu.org
--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
The fact that the error showed up both with libbacktrace and gdb suggest that
the debug information is wrong.
It would have been good to see the DW_TAG_subprogram DIE for foo (using readelf
-w), with the DW_AT_name and DW_AT_linkage_name attributes. This could have
confirmed that the generated debug info was incorrect.
Either way, with trunk I see:
...
<2><126>: Abbrev Number: 5 (DW_TAG_subprogram)
<127> DW_AT_external : 1
<127> DW_AT_name : (indirect string, offset: 0x31a): cp__b
<12b> DW_AT_decl_file : 1
<12c> DW_AT_decl_line : 3
<12d> DW_AT_linkage_name: (indirect string, offset: 0x310):
__foo_MOD_cp__b
<131> DW_AT_low_pc : 0x400632
<139> DW_AT_high_pc : 0xe
<141> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<143> DW_AT_GNU_all_tail_call_sites: 1
...
and:
...
Program aborted. Backtrace:
#0 0x40063f in __foo_MOD_cp__b
at /data/gcc_versions/devel/test2.f90:4
#1 0x400648 in test
at /data/gcc_versions/devel/test2.f90:10
#2 0x40067f in main
at /data/gcc_versions/devel/test2.f90:9
...
So, libbacktrace prints the DW_AT_linkage_name, as is the documented behaviour.
Both the DW_AT_name and DW_AT_linkage name do not contain the 'cp(bool)'
reported in comment 0.
Propose to mark this resolved-fixed.
