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opnsense-src/lib/libthr/thread
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Mark Johnston d146da5d08 libthr: Force the thr_wake() symbol to be resolved during initialization 
Otherwise the lock upgrade performed by rtld's load_filtees() can result
in infinite recursion, wherein:
1. _rtld_bind() acquires the bind read lock,
2. the source DSO's filtees haven't been loaded yet, so the lock upgrade
   in load_filtees() cause rtld to jump to _rtld_bind() and release the
   bind lock,
3. _thr_rtld_lock_release() calls _thr_ast(), which calls thr_wake(),
   which hasn't been resolved yet,
4. _rtld_bind() acquires the bind read lock in order to resolve
   thr_wake(),
5. ...

See the linked pull request for an instance of this problem arising with
libsys.  That particular instance is also worked around by commit
e7951d0b04e6.

Reported by:	brooks
Reviewed by:	kib
Pull Request:	https://github.com/freebsd/freebsd-src/pull/908
MFC after:	1 week
Sponsored by:	Innovate UK

(cherry picked from commit 36f0a34ca645d49ec79d60ea7e773374ef0991ea)
2024-02-09 09:55:46 -05:00
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Makefile.inc Remove $FreeBSD$: one-line sh pattern 2023-08-16 11:55:03 -06:00
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thr_attr.c pthread_attr_get_np(): Use malloc(), report ENOMEM, don't tamper on error 2024-01-26 22:01:30 +01:00
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thr_info.c libc: export pthread_getname_np stub 2023-08-21 01:44:17 +03:00
thr_init.c libc: export pthread_getname_np stub 2023-08-21 01:44:17 +03:00
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thr_private.h pthread_attr_get_np(): Use malloc(), report ENOMEM, don't tamper on error 2024-01-26 22:01:30 +01:00
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thr_rtld.c libthr: Force the thr_wake() symbol to be resolved during initialization 2024-02-09 09:55:46 -05:00
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