Date: Mon, 01 Dec 2025 20:52:50 +0000 From: Mark Peek <mp@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 732b4aa05d78 - main - ctfmerge: fix segfault when building on macOS Message-ID: <692e0022.324d6.525dccf4@gitrepo.freebsd.org>
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The branch main has been updated by mp: URL: https://cgit.FreeBSD.org/src/commit/?id=732b4aa05d78ca6831d02e67a43f34ad104f4f01 commit 732b4aa05d78ca6831d02e67a43f34ad104f4f01 Author: Mark Peek <mp@FreeBSD.org> AuthorDate: 2025-12-01 20:50:24 +0000 Commit: Mark Peek <mp@FreeBSD.org> CommitDate: 2025-12-01 20:50:24 +0000 ctfmerge: fix segfault when building on macOS The barrier code was using semaphores which have been deprecated in macOS and not working at all, causing a race condition. Since macOS does not have pthread_barrier_*(), this change uses a condition variable instead. PR: 290958 Reported by: wosch MFC after: 2 weeks Reviewed by: imp, markj Differential Revision: https://reviews.freebsd.org/D54018 --- cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c | 26 +++--------------------- cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h | 9 ++------ 2 files changed, 5 insertions(+), 30 deletions(-) diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c index c0719620dbde..e1f54e994ce3 100644 --- a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c +++ b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.c @@ -38,9 +38,6 @@ */ #include <pthread.h> -#ifdef illumos -#include <synch.h> -#endif #include <stdio.h> #include "barrier.h" @@ -49,12 +46,7 @@ void barrier_init(barrier_t *bar, int nthreads) { pthread_mutex_init(&bar->bar_lock, NULL); -#ifdef illumos - sema_init(&bar->bar_sem, 0, USYNC_THREAD, NULL); -#else - sem_init(&bar->bar_sem, 0, 0); -#endif - + pthread_cond_init(&bar->bar_cv, NULL); bar->bar_numin = 0; bar->bar_nthr = nthreads; } @@ -65,26 +57,14 @@ barrier_wait(barrier_t *bar) pthread_mutex_lock(&bar->bar_lock); if (++bar->bar_numin < bar->bar_nthr) { + pthread_cond_wait(&bar->bar_cv, &bar->bar_lock); pthread_mutex_unlock(&bar->bar_lock); -#ifdef illumos - sema_wait(&bar->bar_sem); -#else - sem_wait(&bar->bar_sem); -#endif return (0); - } else { - int i; - /* reset for next use */ bar->bar_numin = 0; - for (i = 1; i < bar->bar_nthr; i++) -#ifdef illumos - sema_post(&bar->bar_sem); -#else - sem_post(&bar->bar_sem); -#endif + pthread_cond_broadcast(&bar->bar_cv); pthread_mutex_unlock(&bar->bar_lock); return (1); diff --git a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h index babf2e64e33f..138386f8ed46 100644 --- a/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h +++ b/cddl/contrib/opensolaris/tools/ctf/cvt/barrier.h @@ -33,12 +33,7 @@ * APIs for the barrier synchronization primitive. */ -#ifdef illumos -#include <synch.h> -#else -#include <semaphore.h> -typedef sem_t sema_t; -#endif +#include <pthread.h> #ifdef __cplusplus extern "C" { @@ -48,7 +43,7 @@ typedef struct barrier { pthread_mutex_t bar_lock; /* protects bar_numin */ int bar_numin; /* current number of waiters */ - sema_t bar_sem; /* where everyone waits */ + pthread_cond_t bar_cv; /* where everyone waits */ int bar_nthr; /* # of waiters to trigger release */ } barrier_t;help
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