src/lib/libc/tests/sys, branch release/14.4.0

libc: report _SC_NPROCESSORS_ONLN more accurately in cpu-limited jails

2026-01-20T04:06:56Z

We don't support CPU hotplug, but we do support cpuset(8) restrictions on jails (including prison0, which uses cpuset 1). The process cannot widen its cpuset beyond its root set, so it makes sense to instead report the number of cpus enabled there rather than the total number in the system. This change is effectively a nop for the majority of systems and jails in the wild, though it does reduce the performance of this query now that we can't take advantage of AT_NCPUS being provided in the auxinfo. The implementation here is notably different than Linux, which would not take cgroups into account. They do, however, take CPU hotplug into account, so the possibility for it to diverge from (and be lower than) the # configured count to reflect what the process can actually be scheduled on doesn't really diverge in semantics. Reviewed by: kib (cherry picked from commit d617806aac1469319970e3551656e9deabb98a35)

libc/powerpc64: Fix swapcontext(3)

2025-07-21T02:56:59Z

On PowerPC platforms a valid link to the Table of Contents (TOC) is required for PLT lookups to function. This TOC pointer is stored in a dedicated register, and is used along with the stack pointer by both C prologue and PLT lookup code. When calling swapcontext() with uc_link != NULL, a PLT lookup to setcontext(3) is attempted from within the _ctx_done context. The exiting process has usually trashed both r1 and r2 at this point, leading to a crash within the PLT lookup before setcontext(2) is reached to restore the linked context. Save and restore r2 as in a regular function. This ensures the subsequent PLT lookup to setcontext(3) succeeds. Signed-off-by: Timothy Pearson MFC after: 1 week Pull Request: https://github.com/freebsd/freebsd-src/pull/1759 (cherry picked from commit 8efa35fea384d209c683dfbae8f49f2737a41941)

libc/sys: add errno test

2024-03-02T05:05:05Z

(cherry picked from commit 32fdcff8703da6f2795193acc77ec3c1fb8b723d)

libc: Purge unneeded cdefs.h

2023-11-27T04:20:09Z

These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385 (cherry picked from commit 559a218c9b257775fb249b67945fe4a05b7a6b9f)

Remove a few more stray __FBSDID uses

2023-10-24T17:08:46Z

Reviewed by: imp, emaste Differential Revision: https://reviews.freebsd.org/D41954 (cherry picked from commit 16837d353cdde87672d08112610e51e4121c4e50)

Remove $FreeBSD$: one-line sh pattern

2023-08-16T17:55:03Z

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Remove $FreeBSD$: one-line .c pattern

2023-08-16T17:54:42Z

Remove /^[\s*]*__FBSDID$"\$FreeBSD\$"$;?\s*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

2023-05-12T16:44:03Z

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix

netbsd-tests: Serialize message queue tests

2023-03-10T22:07:06Z

They can fail when run in parallel since they all share a global queue key. MFC after: 1 week

sendfile_test: fix copy-paste bug

2022-02-24T23:05:12Z

Require the newly opened file descriptor to be good, instead of re-requiring the one that was required three lines earlier. Thankfully, opening /dev/null is really unlikely to fail. Reported by: Coverity MFC after: 1 week Sponsored by: Dell EMC Isilon