[Bug tools/23247] Segfault in 0.171 RC1 release candidate

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23247

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

--- Comment #1 from Mark Wielaard <mark at klomp dot org> ---
Thanks, for some reason we used the wrong listptr for locview attributes.
This fixes it:

diff --git a/src/readelf.c b/src/readelf.c
index 2ccbea5..6f2f637 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -9244,7 +9244,7 @@ print_debug_loc_section (Dwfl_Module *dwflmod,

       if (attr == DW_AT_GNU_locviews)
        {
-         Dwarf_Off next_off = next_listptr_offset (&known_loclistsptr,
+         Dwarf_Off next_off = next_listptr_offset (&known_locsptr,
                                                    listptr_idx);
          const unsigned char *locp = readp;
          const unsigned char *locendp;

While looking at this I also noticed that for this test file eu-readelf
--debug-dump=ranges claims to find some unused garbage in .debug_ranges, which
might indicate that we are either missing some attributes in the associated CU,
or GCC really puts garbage in the .debug_ranges section (which would surprise
me).

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