The valgrind implementation is not complete, also not in master: https://sourceware.org/git/?p=valgrind.git;a=blob;f=coregrind/m_debuginfo/readdwarf.c;h=5701c504bd8eedd81aef2be6311c9740f556a6ed;hb=refs/heads/VALGRIND_3_16_BRANCH#l2544