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In this bug the DWARF reader tries to get the parent of a DIE (referred-to by its offset) which is not defined in the debug info. The DIE is not defined, but it's referred-to by another DIE of the debug info. This definitely looks like a faulty DWARF. The DWARF reader aborts because, obviously, it cannot get the parent DIE of a DIE that is not defined. This patch changes the behaviour of the DWARF reader in this case. Rather than aborting, the DWARF reader just drops the DIE (which refers to a non-existing DIE) on the floor. It thus do not abort on such faulty DWARF anymore. * src/abg-dwarf-reader.cc (get_parent_die): If we couldn't find the parent of a given DIE, return false, do not abort. Also, assert that if we don't find the parent of a DIE in the main debug info, we don't find it in the alternate debug info either (and vice versa). This is because I'd like to abort on cases where we look for a DIE in the wrong debug info; those cases are likely to be hint that the DWARF reader is doing something wrong which ought to be investigated and fixed. (get_scope_for_die): If we couldn't get the parent of the DIE, then return a nil scope. * tests/data/test-types-stability/pr19204-libtcmalloc.so.4.2.6-xlc: New test binary input. * tests/data/Makefile.am: Add the new binary test input to the source distribution. * tests/test-types-stability.cc (elf_paths): Account for the new binary input. Signed-off-by: Dodji Seketeli <dodji@redhat.com> |
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| .. | ||
| data | ||
| Makefile.am | ||
| print-diff-tree.cc | ||
| runtestcanonicalizetypes.sh.in | ||
| test-abicompat.cc | ||
| test-abidiff.cc | ||
| test-alt-dwarf-file.cc | ||
| test-core-diff.cc | ||
| test-diff2.cc | ||
| test-diff-dwarf-abixml.cc | ||
| test-diff-dwarf.cc | ||
| test-diff-filter.cc | ||
| test-diff-pkg.cc | ||
| test-diff-suppr.cc | ||
| test-dot.cc | ||
| test-ir-walker.cc | ||
| test-lookup-syms.cc | ||
| test-read-dwarf.cc | ||
| test-read-write.cc | ||
| test-svg.cc | ||
| test-types-stability.cc | ||
| test-utils.cc | ||
| test-utils.h | ||
| test-write-read-archive.cc | ||
| update-test-read-dwarf-output.py | ||