Date: Tue, 26 Mar 2019 19:39:07 -0700 From: Enji Cooper <yaneurabeya@gmail.com> To: Alan Somers <asomers@FreeBSD.org> Cc: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: Re: svn commit: r345563 - projects/fuse2/tests/sys/fs/fusefs Message-ID: <43ACF554-1D64-4CDE-AB22-8A13E3585CC9@gmail.com> In-Reply-To: <201903270024.x2R0Ov1e073868@repo.freebsd.org> References: <201903270024.x2R0Ov1e073868@repo.freebsd.org>
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> On Mar 26, 2019, at 5:24 PM, Alan Somers <asomers@FreeBSD.org> wrote: > > Author: asomers > Date: Wed Mar 27 00:24:57 2019 > New Revision: 345563 > URL: https://svnweb.freebsd.org/changeset/base/345563 > > Log: > fusefs: fix a race condition in the allow_other test > > The test could occasionally hang if the parent's SIGUSR2 signal arrived > before the child had pause()d. Using POSIX semaphores precludes that > possibility. > > Sponsored by: The FreeBSD Foundation … > + sem = (sem_t*)mmap(NULL, sizeof(*sem), mprot, mflags, -1, 0); > + ASSERT_NE(NULL, sem) << strerror(errno); mmap will return “MAP_FAILED”, not NULL, on error. Thanks, -Enjihelp
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