On Thu, 2012-04-12 at 15:22 -0700, Josh Stone wrote:
I'm seeing a segfault in your debugtypes.exp test added to
with my poor unpatched elfutils-0.153 on F16. The call to
dwarf_offdie_types is returning NULL, which the calling code is not
So is the NULL return the extent of the failure? Or is elfutils
generally borked after that?
And even apart from this bug, should we be ready for NULL return from
dwarf_offdie_types() anyway? Same question for dwarf_offdie(), I guess.
NULL can be returned fir dwarf_offdie () or dwarf_offdie_types () when
you give an offset that isn't really a DIE offset inside the debug_info
or debug_types section or when invalid DWARF is encountered. In such
cases NULL is returned and dwarf_errno () is set. The bug was in the
code that associated the right CU or TU with the returned Dwarf_Die. The
CU/TU is cached, but before the bug the cache could become bad and then
even valid offsets could fail, but the bug only impacted