[Bug libdw/23982] dwarf_formref_die() does not support DW_FORM_indirect

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23982

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #4 from Mark Wielaard <mark at klomp dot org> ---
This was implemented by:

commit d63b26b8d21fb554049789290cd245cbe0446735
Author: Omar Sandoval <osandov@fb.com>
Date:   Fri Apr 23 16:36:15 2021 -0700

    libdw: handle DW_FORM_indirect when reading attributes

    Whenever we encounter an attribute with DW_FORM_indirect, we need to
    read its true form from the DIE data. Then, we can continue normally.
    This adds support to the most obvious places: __libdw_find_attr() and
    dwarf_getattrs(). There may be more places that need to be updated.

    I encountered this when inspecting a file that was processed by our BOLT
    tool: https://github.com/facebookincubator/BOLT. This also adds a couple
    of test cases using a file generated by that tool.

    Signed-off-by: Omar Sandoval <osandov@fb.com>

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