https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89625
Bug ID: 89625
Summary: Freeing memory under the lock in
__deregister_frame_info_bases
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: antoshkka at gmail dot com
Target Milestone: ---
`__deregister_frame_info_bases` in file unwind-dw2-fde.c calls `free
(ob->u.sort);` under the locked `object_mutex`. This can be avoided by
remembering the pointer to free and freeing it outside the critical section.
This has been fixed in upstream glibc
https://github.com/bminor/glibc/commit/2604882cefd3281679b8177245fdebc7061b8695#diff-17235859a5d2697ce97070a69ab9a602
