Date: Fri, 17 Apr 2026 00:42:49 +0000 From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 52aed375638d - stable/15 - libthr.3: describe SIGTHR Message-ID: <69e18209.426b8.5063a157@gitrepo.freebsd.org>
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The branch stable/15 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=52aed375638dc5278a28c515fe9a0cdcf6c0aaa9 commit 52aed375638dc5278a28c515fe9a0cdcf6c0aaa9 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2026-04-13 23:42:51 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2026-04-17 00:42:38 +0000 libthr.3: describe SIGTHR (cherry picked from commit 934a35ac2bbbcf8cd65d8824fa824eb5c6170c88) --- lib/libthr/libthr.3 | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/lib/libthr/libthr.3 b/lib/libthr/libthr.3 index 8c7b84490547..5d9c5ec6706b 100644 --- a/lib/libthr/libthr.3 +++ b/lib/libthr/libthr.3 @@ -269,6 +269,25 @@ the critical section. This should be taken into account when interpreting .Xr ktrace 1 logs. +.Pp +The +.Nm +library uses the +.Va SIGTHR +signal for internal operations, in particular, +for cancellation requests. +This signal's masking and disposition is controlled by the library, +and user programs should not try to modify them. +The library interposes functions controlling signals to prevent +inadvertent modifications and to guard portable code against +exposure to +.Va SIGTHR . +.Pp +Note: similarly, the +.Va SIGLIBRT +signal is reserved for use by +.Lb librt , +and should be not modified by users. .Sh PROCESS-SHARED SYNCHRONIZATION OBJECTS In the .Li libthrhome | help
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