+++ This bug was initially created as a clone of Bug #1985048 +++ Description of problem: malloc hooks and debugging support have been moved from libc.so to a new DSO libc_malloc_debug.so, which can be preloaded to get the functionality back. The DSO will get installed by default into glibc but it should be in glibc-devel or glibc-utils to allow its removal from the core library. Indicative PR here: https://src.fedoraproject.org/rpms/glibc/pull-request/35
This doesn't need any special changes at the moment so closing this.
Reopening since we need to backport a spec fix[1] to resolve this. https://src.fedoraproject.org/rpms/glibc/pull-request/37