[Bug libbacktrace/82857] libbacktrace: please support binaries stripped with dwz -m (following the .gnu_debugaltlink)

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82857

--- Comment #8 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Thu Jan 17 13:42:20 2019
New Revision: 268031

URL: https://gcc.gnu.org/viewcvs?rev=268031&root=gcc&view=rev
Log:
[libbacktrace] Handle DW_FORM_GNU_ref_alt

Handle DW_FORM_GNU_ref_alt which references the .debug_info section in the
.gnu_debugaltlink file.

2019-01-17  Tom de Vries  <tdevr...@suse.de>

        PR libbacktrace/82857
        * dwarf.c (enum attr_val_encoding): Add ATTR_VAL_REF_ALT_INFO.
        (read_attribute): Handle DW_FORM_GNU_ref_alt using
        ATTR_VAL_REF_ALT_INFO.
        (read_referenced_name_from_attr): Handle DW_FORM_GNU_ref_alt.

Modified:
    trunk/libbacktrace/ChangeLog
    trunk/libbacktrace/dwarf.c