is safe to call pthread_mutex_init() on the same shared mutex several
times. POSIX claims that the behaviour in this case is undefined.
Make this working by only allowing one caller to initialize the mutex.
Other callers either see already completed initialization and do
nothing, or busy-loop yielding while designated initializer finishes.
Also make the API requirements loose by initializing mutexes on other
pthread_mutex*() calls if they see uninitialized shared mutex.
Only mutexes provide the hack for now, but it could be also
implemented for other process shared primitives from libthr.
Reported and tested by: "Oleg V. Nauman" <oleg@opentransfer.com>
Sponsored by: The FreeBSD Foundation
First, update the return types of aio_return() and aio_waitcomplete() to
ssize_t.
POSIX requires aio_return() to return a ssize_t so that it can represent
all return values from read() and write(). aio_waitcomplete() should use
ssize_t for the same reason.
aio_return() has used ssize_t in <aio.h> since r31620 but the manpage and
system call entry were not updated. aio_waitcomplete() has always
returned int.
Note that this does not require new system call stubs as this is
effectively only an API change in how the compiler interprets the return
value.
Second, allow aio_nbytes values up to IOSIZE_MAX instead of just INT_MAX.
aio_read/write should now honor the same length limits as normal read/write.
Third, use longs instead of ints in the aio_return() and aio_waitcomplete()
system call functions so that the 64-bit size_t in the in-kernel aiocb
isn't truncated to 32-bits before being copied out to userland or
being returned.
Finally, a simple test has been added to verify the bounds checking on the
maximum read size from a file.
the value in a new global intf_mtu for use by the application.
These changes were inspired by the patch provided by Robert Blayzor in
PR 187094, and will allow loader(8) to propagate the value to the kernel
along with the other nfs_diskless parms delivered via environment vars.
wrapped in an i386 ifdef with a comment questioning their usefulness even
there. It turns out they aren't referenced anywhere, but their presence
prevents using sys/endian.h in libstand code.
These days, sys/endian.h provides much better support for such things, using
compiler builtins and inline functions (and creating connections between
libstand code and header files from sys/ would not be breaking new ground).
of the pshared hash in child is consistent and can be safely used.
Reported and tested by: "Oleg V. Nauman" <oleg@opentransfer.com>
Sponsored by: The FreeBSD Foundation
control terminal, activated when running with pid 1. It is
application duty to handle this, and unsuspecting init replacements
which are linked with libthr would be broken by this.
The pre-resolving of getpid() is restored, just in case.
Reviewed by: jilles
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
for the armv6 ABI switch. This also make WITH_LIBSOFT functional on
the arm platform. As a transition thing, this seems to work even
without switching the ABI (we basically build the same libraries
twice when MK_LIBSOFT=yes until the ABI cut over next
month). MK_LIBSOFT remains default no.
These entries should have never been present since they only exist for
compat with FreeBSD 6.x (and older) binaries. This was missed in r296572.
Technically this breaks the ABI by removing versioned symbols. However,
no binaries should be linked against these symbols. No release has
shipped with a header that contained a prototype for these functions.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D5615
This is not SUBDIR_PARALLEL and if it were this .ORDER would not work
since the targets are <target>_subdir_<subdir> not <subdir>.
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
At least FAST_DEPEND won't even run 'make depend', so the code was
potentially broken with FAST_DEPEND anyhow. The .dinclude directive
will ignore missing files rather than make them be fatal.
Sponsored by: EMC / Isilon Storage Division
Further to r240152 (i386) and r240178 (amd64), hide the .cerror symbol
so that it is not exported if symbol versioning is not in use. Without
this change WITHOUT_SYMVER libc contains .text relocations for .cerror,
as described in LLVM PR 26813 (http://llvm.org/pr26813).
This is a no-op for the regular build as the symbol version script
already controls .cerror visibility.
PR: 207712
Submitted by: Rafael Espíndola
Reviewed by: jilles, kib
Differential Revision: https://reviews.freebsd.org/D5571
Undo update of libedit 2016-02-27
Something in libedit appears to be causing breakage in lldb38.
The changes are not generally huge but they are suficient to
to justify reverting for now.
Reported by: novel, bapt
There is also a small portability crutch, also present in NetBSD,
to allow compiling on a system that doesn't define O_CLOEXEC.
Approved by: rpaulo (mentor)
Obtained from: NetBSD (r1.17, r1.18)
Differential Revision: https://reviews.freebsd.org/D5549
This mistakenly removed the SUBDIR_PARALLEL but even worse is that the install
(and build) order is not correct due to the lack of SUBDIR_DEPEND on the
most critical libraries. The only reason they build correctly now is because
buildworld's 'make libraries' orders them properly.
Pointyhat to: bdrewery
Sponsored by: EMC / Isilon Storage Division
Avoid casting gymnastics that lead to pointer aliasing by introducing an
inline function as done in NetBSD (but without #if0'd WIP code).
Obtained from: NetBSD (CVS Rev. 1.24, 1.25)
According to POSIX, The mbtowc() function shall fail if:
[EILSEQ] An invalid character sequence is detected.
Reviewed by: bapt
Differential Revision: https://reviews.freebsd.org/D5496
Obtained from: OpenBSD (Ingo Schwarze)
MFC after: 1 month
Add missing Symbol.map entry for __aligned_alloc.
Add weak-->strong symbol binding for
{malloc_stats_print,mallctl,mallctlnametomib,mallctlbymib} -->
{__malloc_stats_print,__mallctl,__mallctlnametomib,__mallctlbymib}. These
bindings complete the set necessary to allow applications to replace all
malloc-related symbols.
