DJ Delorie [Wed, 3 May 2017 20:25:15 +0000 (16:25 -0400)]
Tweak realloc/MREMAP comment to be more accurate.
MMap'd memory isn't shrunk without MREMAP, but IIRC this is intentional for
performance reasons. Regardless, this patch tweaks the existing comment to
be more accurate wrt the existing code.
[BZ #21411]
* malloc/malloc.c: Tweak realloc/MREMAP comment to be more accurate.
Carlos O'Donell [Wed, 3 May 2017 19:37:04 +0000 (15:37 -0400)]
Bug 20686: Add el_GR@euro support.
Despite the fact that el_GR is ISO-8859-7:2003 which contains the euro
symobl, it is not possible to know this apriori to selecting the el_GR
locale. Therefore you don't know if el_GR can possibly have the 2003
ammendments which include the euro symbol. This is resolved by creating
an el_GR@euro locale similar to all the other @euro locales for non-UTF8
charsets.
This patch consolidates the epoll_wait Linux syscall generation on
sysdeps/unix/sysv/linux/epoll_wait.c. The implementation tries to
use __NR_epoll_wait if defined, otherwise calls epoll_pwait.
Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.
* sysdeps/unix/sysv/linux/epoll_wait.c: New file.
* sysdeps/unix/sysv/linux/generic/epoll_wait.c: Remove file.
* sysdeps/unix/sysv/linux/syscalls.list: Remove epoll_wait from
auto-generation list.
This patch consolidates the select Linux syscall implementation on
sysdeps/unix/sysv/linux/select.c. The changes are:
1. Remove select from auto-generation syscalls.list on the architecture
that uses __NR_select.
2. Remove generic implementation add a default one that handle all
current cases (with the expection of alpha)
The new default implementation will either use __NR_select if
available of fallback to __NR_pselect6 otherwise.
3. Add a alpha outlier implementation which requires old compatibility
symbols.
Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
arch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.
* sysdeps/unix/sysv/linux/alpha/Makefile (sysdep_routines): Add
osf_select.
* sysdeps/unix/sysv/linux/alpha/select.c: New file.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove select and
osf_select from auto-generation list.
* sysdeps/unix/sysv/linux/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/generic/select.c: Remove file.
* sysdeps/unix/sysv/linux/select.c: New file.
This patch consolidates the poll Linux syscall implementation on
sysdeps/unix/sysv/linux/poll.c. It basically removes poll from
auto-generation list and add a default implementation that either
call __NR_poll directly (if the kernel headers defines it) or
ppoll adjusting the timeout argument (as the generic implementation).
Checked on i686-linux-gnu, x86_64-linux-gnu, x86_64-linux-gnux32,
aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu.
* sysdeps/unix/sysv/linux/generic/poll.c: Remove file.
* sysdeps/unix/sysv/linux/poll.c: New file.
* sysdeps/unix/sysv/linux/syscalls.list: Remove poll from
auto-generation list.
This patch adds internal alias for __pread, __pread64, and __pwrite
following the already in place one for __pwrite64. This is not used
in any implementation but on microblaze on preadv/pwritev fallback
(since it does not define __ASSUME_PREADV).
In fact it was signaled by commit c35db50ff5 which update the expected
localptl.data for the architecture based on resulted value. This patch
updates the plt for microblaze now that p{read,write}{64} are correctly
routed to use internal alias.
Checked on x86_64-linux-gnu and a build for all supported architectures
(no all variants although).
1. Fix the results for negative subnormals by ignoring the signal when
normalizing the value.
2. Fix the output when the high part is a power of 2 and the low part
is a nonzero number with opposite sign. This fix is based on commit 380bd0fd2418f8988217de950f8b8ff18af0cb2b.
After applying this patch, logbl() tests pass cleanly on POWER >= 7.
Tested on powerpc, powerpc64 and powerpc64le
[BZ #21280]
* sysdeps/powerpc/power7/fpu/s_logbl.c (__logbl): Ignore the
signal of subnormals and adjust the exponent of power of 2 down
when low part has opposite sign.
Paul E. Murphy [Fri, 15 Jul 2016 23:04:40 +0000 (18:04 -0500)]
powerpc64le: Create divergent sysdep directory for powerpc64le.
float128 on powerpc64le requires the addition of the ieee754/float128
sysdep, whereas powerpc64 doesn't. This requires creating a bunch of
submachine and cpu directories and Implies files which just point
towards their powerpc64 equivalent.
Tested on P7, P8, and generic powerpc64le targets with and without
multiarch.
* sysdeps/powerpc/powerpc64le/Implies: New file.
* sysdeps/powerpc/powerpc64le/fpu/Implies: New file.
* sysdeps/powerpc/powerpc64le/fpu/multiarch/Implies: New file.
* sysdeps/powerpc/powerpc64le/multiarch/Implies: New file.
* sysdeps/powerpc/powerpc64le/power7/Implies: New file.
* sysdeps/powerpc/powerpc64le/power7/fpu/Implies: New file.
* sysdeps/powerpc/powerpc64le/power7/fpu/multiarch/Implies: New file.
* sysdeps/powerpc/powerpc64le/power7/multiarch/Implies: New file.
* sysdeps/powerpc/powerpc64le/power8/Implies: New file.
* sysdeps/powerpc/powerpc64le/power8/fpu/Implies: New file.
* sysdeps/powerpc/powerpc64le/power8/fpu/multiarch/Implies: New file.
* sysdeps/powerpc/powerpc64le/power8/multiarch/Implies: New file.
* sysdeps/powerpc/powerpc64le/power9/Implies: New file.
* sysdeps/powerpc/powerpc64le/power9/fpu/Implies: New file.
* sysdeps/powerpc/powerpc64le/power9/fpu/multiarch/Implies: New file.
* sysdeps/powerpc/powerpc64le/power9/multiarch/Implies: New file.
* sysdeps/powerpc/preconfigure: New file.
* sysdeps/unix/sysv/linux/powerpc/powerpc64le/Implies: New file.
* sysdeps/unix/sysv/linux/powerpc/powerpc64le/fpu/Implies: New file.
Joseph Myers [Fri, 28 Apr 2017 16:52:16 +0000 (16:52 +0000)]
conformtest: Allow time.h inclusion from semaphore.h for XOPEN2K.
POSIX.1:2001 added sem_timedwait, but said nothing about defining
struct timespec in semaphore.h. The 2008 edition added a
corresponding permission to include <time.h> from <semaphore.h>.
Since this is the normal POSIX approach in such cases, it seems
appropriate to consider this a bug fix, and so this patch makes the
conform/ tests allow that inclusion for POSIX.1:2001 as well.
Joseph Myers [Thu, 27 Apr 2017 20:29:35 +0000 (20:29 +0000)]
conformtest: Fix XPG standard naming.
The conform/ tests test -D_XOPEN_SOURCE under the name "XPG3", and
-D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED under the name "XPG4".
That naming is misleading. _XOPEN_SOURCE_EXTENDED actually means
XPG4.2, including UX-shaded interfaces. _XOPEN_SOURCE actually means
XPG4, or XPG4.2 without UX-shaded interfaces. (Prior XPG versions
also used _XOPEN_SOURCE, but without any versioning of the values of
the macro, so XPG4.2 without UX-shaded interfaces is the only sensible
set of interfaces for glibc to expose given _XOPEN_SOURCE=1 without
_XOPEN_SOURCE_EXTENDED defined.)
This patch fixes the naming in the conform/ tests, so that what is now
called XPG4 is changed to XPG42, and what is now called XPG3 is
changed to XPG4.
Tested for x86_64 (and verified the complete set of expectations is
unchanged by the patch beyond the intended renaming).
Joseph Myers [Wed, 26 Apr 2017 15:26:47 +0000 (15:26 +0000)]
Default build-many-glibcs.py to GCC 7 branch.
Now there is a GCC 7 release branch, this patch makes
build-many-glibcs.py default to using it instead of GCC 6.
Relative to GCC 6, this fixes the MicroBlaze build but introduces ICEs
building glibc testcases for SH (GCC PRs 78459, 78460; the latter is
an out-of-memory issue so you may want to set memory limits when
running build-many-glibcs.py).
* scripts/build-many-glibcs.py (Context.checkout): Default gcc
version to 7 branch.
When using software completions, we have to prevent assembler to match
input and output operands of sqrtt/sqrtf insn. Add earlyclobber to
output operand to avoid unwanted operand matching.
2017-04-14 Uros Bizjak <ubizjak@gmail.com>
* sysdeps/alpha/fpu/math_private.h (__ieee754_sqrt): Add
earlyclobber to output operand of sqrt insn.
(__ieee754_sqrtf): Ditto.
Joseph Myers [Tue, 25 Apr 2017 17:52:47 +0000 (17:52 +0000)]
Fix sys/socket.h namespace issues from sys/uio.h inclusion (bug 21426).
sys/socket.h includes sys/uio.h to get the definition of the iovec
structure.
POSIX allows sys/socket.h to make all sys/uio.h symbols visible.
However, all of sys/uio.h is XSI-shaded, so for non-XSI POSIX this
results in conformtest failures (for sys/socket.h and other headers
that include it):
Now, there is some ambiguity in POSIX about what namespace
reservations apply in this case - see
http://austingroupbugs.net/view.php?id=1127 - but glibc convention
would still avoid declaring readv and writev, for example, for feature
test macros that don't include them (if only headers from the relevant
standard are included), even if such declarations are permitted, so
there is a bug here according to glibc conventions.
This patch moves the struct iovec definition to a new
bits/types/struct_iovec.h header and includes that from sys/socket.h
instead of including the whole of sys/uio.h. This fixes the namespace
issue; however, three files in glibc that were relying on the implicit
inclusion needed to be updated to include sys/uio.h explicitly. So
there is a question of whether sys/socket.h should continue to include
sys/uio.h under some conditions, such as __USE_XOPEN or __USE_MISC or
__USE_XOPEN || __USE_MISC, for greater compatibility with code that
(wrongly) expects this optional inclusion to be present there. (I
think the three affected files in glibc should still have explicit
sys/uio.h inclusions added in any case, however.)
Tested for x86_64.
[BZ #21426]
* misc/bits/types/struct_iovec.h: New file.
* misc/Makefile (headers): Add bits/types/struct_iovec.h.
* include/bits/types/struct_iovec.h: New file.
* bits/uio.h (struct iovec): Replace by inclusion of
<bits/types/struct_iovec.h>.
* sysdeps/unix/sysv/linux/bits/uio.h (struct iovec): Likewise.
* socket/sys/socket.h: Include <bits/types/struct_iovec.h> instead
of <sys/uio.h>.
* nptl/tst-cancel4.c: Include <sys/uio.h>
* posix/test-errno.c: Likewise.
* support/resolv_test.c: Likewise.
* conform/Makefile (test-xfail-POSIX2008/arpa/inet.h/conform):
Remove.
(test-xfail-POSIX2008/netdb.h/conform): Likewise.
(test-xfail-POSIX2008/netinet/in.h/conform): Likewise.
(test-xfail-POSIX2008/sys/socket.h/conform): Likewise.
Joseph Myers [Tue, 25 Apr 2017 16:00:28 +0000 (16:00 +0000)]
conformtest: Allow *_t in sys/socket.h.
The conformtest expectations in sys/socket.h are missing the standard
POSIX allowance for all headers to define *_t names. For XSI standard
versions that allowance comes in via the permission to include
<sys/uio.h> (for which the expectations properly allow *_t), but for
non-XSI POSIX nothing brings in that allowance and spurious namespace
failures occur. This patch adds the required permission to the
expectations to remove the spurious failures (by itself this does not
allow any XFAILs to be removed).
This patch moves the declaration of many floating-point functions from
math_private.h to math_private_calls.h and macroize the declaration to
be dependent on floating-point type. For each of float, double, and
long double, the new header file is included once. This reduces the
amount of repetitive boilerplate that will be required when adding
float128 versions of these functions.
Tested for powerpc64le and s390x.
* sysdeps/generic/math_private.h: Move the declaration of many
functions to sysdeps/generic/math_private_calls.h.
* sysdeps/generic/math_private_calls.h: New file with the
declarations of the functions removed from math_private.h
macroized by floating-point type.
Stefan Liebler [Fri, 21 Apr 2017 13:30:00 +0000 (15:30 +0200)]
S390: Move utf8-utf32-z9.c to multiarch folder and use s390_libc_ifunc_expr macro.
The utf8-utf32-z9.c iconv module is using ifunc and thus the ifunc part should
be in multiarch folder. Otherwise ifunc is used even if you configure
with --disable-multi-arch.
This patch moves the ifunc resolvers to the new file
sysdeps/s390/multiarch/utf8-utf32-z9.c. The resolvers are now implemented
with s390_libc_ifunc_expr macro instead of using gcc attribute ifunc directly.
The ifunc versions are implemented in sysdeps/s390/utf8-utf32-z9.c.
Each version is only implemented if needed or supported. Therefore there is
a block at beginning of the file which selects the versions which should be
defined depending on support for multiarch, vector-support and used minimum
architecture level. This block defines HAVE_[FROM|TO]_[C|CU|VX] to 1 or 0.
The code below is rearranged and surrounded
by #if HAVE_[FROM|TO]_[C|CU|VX] == 1. There is no functional change.
The cu instructions are z9 zarch instructions. As the major distros are
already using the newer z196 as architecture level set, those instructions
can be used as fallback version instead of the c-code. This behaviour is
decided at compile time via HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT.
ChangeLog:
* sysdeps/s390/multiarch/utf8-utf32-z9.c: New File.
* sysdeps/s390/utf8-utf32-z9.c: Move ifunc resolvers to multiarch
folder and define ifunc versions depending on HAVE_[FROM|TO]_[C|CU|VX].
(HAVE_FROM_C, HAVE_FROM_CU, HAVE_FROM_VX, HAVE_TO_C, HAVE_TO_VX,
FROM_LOOP_DEFAULT, FROM_LOOP_C, FROM_LOOP_CU, FROM_LOOP_VX,
TO_LOOP_DEFAULT, TO_LOOP_C, TO_LOOP_VX): New Define.
Stefan Liebler [Fri, 21 Apr 2017 13:30:00 +0000 (15:30 +0200)]
S390: Move utf16-utf32-z9.c to multiarch folder and use s390_libc_ifunc_expr macro.
The utf16-utf32-z9.c iconv module is using ifunc and thus the ifunc part should
be in multiarch folder. Otherwise ifunc is used even if you configure
with --disable-multi-arch.
This patch moves the ifunc resolvers to the new file
sysdeps/s390/multiarch/utf16-utf32-z9.c. The resolvers are now implemented
with s390_libc_ifunc_expr macro instead of using gcc attribute ifunc directly.
The ifunc versions are implemented in sysdeps/s390/utf16-utf32-z9.c.
Each version is only implemented if needed or supported. Therefore there is
a block at beginning of the file which selects the versions which should be
defined depending on support for multiarch, vector-support and used minimum
architecture level. This block defines HAVE_[FROM|TO]_[C|VX] to 1 or 0.
The code below is rearranged and surrounded
by #if HAVE_[FROM|TO]_[C|VX] == 1. There is no functional change.
ChangeLog:
* sysdeps/s390/multiarch/utf16-utf32-z9.c: New File.
* sysdeps/s390/utf16-utf32-z9.c: Move ifunc resolvers to multiarch
folder and define ifunc versions depending on HAVE_[FROM|TO]_[C|VX].
(HAVE_FROM_C, HAVE_FROM_VX, HAVE_TO_C, HAVE_TO_VX, FROM_LOOP_DEFAULT,
FROM_LOOP_C, FROM_LOOP_VX, TO_LOOP_DEFAULT, TO_LOOP_C, TO_LOOP_VX):
New Define.
Stefan Liebler [Fri, 21 Apr 2017 13:30:00 +0000 (15:30 +0200)]
S390: Move utf8-utf16-z9.c to multiarch folder and use s390_libc_ifunc_expr macro.
The utf8-utf16-z9.c iconv module is using ifunc and thus the ifunc part should
be in multiarch folder. Otherwise ifunc is used even if you configure
with --disable-multi-arch.
This patch moves the ifunc resolvers to the new file
sysdeps/s390/multiarch/utf8-utf16-z9.c. The resolvers are now implemented
with s390_libc_ifunc_expr macro instead of using gcc attribute ifunc directly.
The ifunc versions are implemented in sysdeps/s390/utf8-utf16-z9.c.
Each version is only implemented if needed or supported. Therefore there is
a block at beginning of the file which selects the versions which should be
defined depending on support for multiarch, vector-support and used minimum
architecture level. This block defines HAVE_[FROM|TO]_[C|CU|VX] to 1 or 0.
The code below is rearranged and surrounded
by #if HAVE_[FROM|TO]_[C|CU|VX] == 1. There is no functional change.
The cu instructions are z9 zarch instructions. As the major distros are
already using the newer z196 as architecture level set, those instructions
can be used as fallback version instead of the c-code. This behaviour is
decided at compile time via HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT.
ChangeLog:
* sysdeps/s390/multiarch/utf8-utf16-z9.c: New File.
* sysdeps/s390/utf8-utf16-z9.c: Move ifunc resolvers to multiarch
folder and define ifunc versions depending on HAVE_[FROM|TO]_[C|CU|VX].
(HAVE_FROM_C, HAVE_FROM_CU, HAVE_FROM_VX, HAVE_TO_C, HAVE_TO_VX,
FROM_LOOP_DEFAULT, FROM_LOOP_C, FROM_LOOP_CU, FROM_LOOP_VX,
TO_LOOP_DEFAULT, TO_LOOP_C, TO_LOOP_VX): New Define.
Stefan Liebler [Fri, 21 Apr 2017 13:30:00 +0000 (15:30 +0200)]
S390: Use new s390_libc_ifunc_expr macro in s390 8bit-generic.c.
This patch adds s390_libc_ifunc_expr macro which uses the __ifunc base macro
in include/libc-symbols.h and lets the user define a generic expression to
choose the correct ifunc variant. Furthermore as the base macro is used,
the ifunc resolver functions are now also using inhibit_stack_protector.
S390 needs its own version due to the hwcap argument of the ifunc resolver.
This new macro is now used in iconv code in 8bit-generic.c instead of using
gcc attribute ifunc directly.
ChangeLog:
* sysdeps/s390/multiarch/ifunc-resolve.h
(s390_libc_ifunc_expr_init, s390_libc_ifunc_expr): New Define.
* sysdeps/s390/multiarch/8bit-generic.c
(__to_generic, __from_generic): Use s390_libc_ifunc_expr to
define ifunc resolvers.
Joseph Myers [Thu, 20 Apr 2017 20:35:21 +0000 (20:35 +0000)]
Do not use wildcard symbol names for public versions in Versions files.
As noted in
<https://sourceware.org/ml/libc-alpha/2012-12/msg00240.html>,
stdlib/Versions and wcsmbs/Versions list some functions as
__strto*_internal and __wcsto*_internal rather than explicitly listing
the symbols to be exported (so any new internal function matching one
of those patterns would be wrongly added to version GLIBC_2.0), which
seems like a bad idea. This patch changes those files to list the
exported symbols explicitly. There are still entries in
sysdeps/nacl/Versions for __nacl_irt_*, but as GLIBC_PRIVATE symbols
that seems less significant.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by the patch.
Simplify the Linux accept4 implementation based on the assumption
that it is available in some way. __ASSUME_ACCEPT4_SOCKETCALL was
previously unused, so remove it.
For ia64, the accept4 system call (and socket call) were backported
in kernel version 3.2.18. Reflect this in the installation
instructions.
Joseph Myers [Tue, 18 Apr 2017 23:51:35 +0000 (23:51 +0000)]
conformtest: Enable tests when cross compiling.
This patch enables the compilation part of the conformtest tests (the
vast bulk of them) when cross compiling, so making it easy to run them
across many configurations with build-many-glibcs.py.
Tested with build-many-glibcs.py.
* conform/Makefile (tests-special): Do not make addition of
$(conformtest-header-tests) conditional on [$(cross-compiling) = no].
(generated): Do not make addition of $(conformtest-header-base)
conditional on [$(cross-compiling) = no].
sysdeps/unix/sysv/linux/bits/socket.h includes asm/socket.h. That
includes asm/sockios.h, which on MIPS includes asm/ioctl.h, resulting
in namespace violations from IOC* macros.
bits/socket.h already has code to handle asm/socket.h unconditionally
defining macros that are only wanted for __USE_MISC. This patch
extends it to handle the IOC* macros as well (always undefining them
if not defined when bits/socket.h was included, as I don't think they
are part of the intended API even for __USE_MISC).
It's possible there should also be a kernel fix - it's not clear to me
that IOC* belong in the uapi headers, and even if they do they might
best be split out into another header to avoid getting defined by this
particular path. But since glibc needs to deal with existing kernel
headers, it also seems appropriate to extend the existing workaround
to these macros.
Tested (compilation only) with build-many-glibcs.py.
[BZ #21267]
* sysdeps/unix/sysv/linux/bits/socket.h (IOCSIZE_MASK): Undefine
if defined by <asm/socket.h> and not previously defined.
(IOCSIZE_SHIFT): Likewise.
(IOC_IN): Likewise.
(IOC_INOUT): Likewise.
(IOC_OUT): Likewise.
H.J. Lu [Tue, 18 Apr 2017 21:01:45 +0000 (14:01 -0700)]
x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396]
On Skylake server, AVX512 load/store instructions in memcpy/memset may
lead to lower CPU turbo frequency in certain situations. Use of AVX2
in memcpy/memset has been observed to have improved overall performance
in many workloads due to the higher frequency.
Since AVX512ER is unique to Xeon Phi, this patch sets Prefer_No_AVX512
if AVX512ER isn't available so that AVX2 versions of memcpy/memset are
used on Skylake server.
[BZ #21396]
* sysdeps/x86/cpu-features.c (init_cpu_features): Set
Prefer_No_AVX512 if AVX512ER isn't available.
* sysdeps/x86/cpu-features.h (bit_arch_Prefer_No_AVX512): New.
(index_arch_Prefer_No_AVX512): Likewise.
* sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Don't use
AVX512 version if Prefer_No_AVX512 is set.
* sysdeps/x86_64/multiarch/memcpy_chk.S (__memcpy_chk):
Likewise.
* sysdeps/x86_64/multiarch/memmove.S (__libc_memmove): Likewise.
* sysdeps/x86_64/multiarch/memmove_chk.S (__memmove_chk):
Likewise.
* sysdeps/x86_64/multiarch/mempcpy.S (__mempcpy): Likewise.
* sysdeps/x86_64/multiarch/mempcpy_chk.S (__mempcpy_chk):
Likewise.
* sysdeps/x86_64/multiarch/memset.S (memset): Likewise.
* sysdeps/x86_64/multiarch/memset_chk.S (__memset_chk):
Likewise.
H.J. Lu [Tue, 18 Apr 2017 15:27:22 +0000 (08:27 -0700)]
x86: Set Prefer_No_VZEROUPPER if AVX512ER is available
AVX512ER won't be implemented in any Xeon processors and will be in
all Xeon Phi processors. Don't check CPU model number when setting
Prefer_No_VZEROUPPER for Xeon Phi. Instead, set Prefer_No_VZEROUPPER
if AVX512ER is available. It works with current and future Xeon Phi
and non-Xeon Phi processors.
P7 code is used for <=32B strings and for > 32B vectorized loops are used.
This shows as an average 25% improvement depending on the position of search
character. The performance is same for shorter strings.
Tested on ppc64 and ppc64le.
Rabin Vincent [Mon, 17 Apr 2017 15:03:44 +0000 (12:03 -0300)]
[BZ 21357] unwind-dw2-fde: Call free() outside of unwind mutex
__deregister_frame_info_bases() calls free() while holding a mutex which
is also used from _Unwind_Find_FDE(). This leads to a deadlock if
AddressSanitizer uses _Unwind_Backtrace() from its free()
implementation.
Checked on mips-linux-gnu and x86_64-linux-gnu.
[BZ #21357]
* sysdeps/generic/unwind-dw2-fde.c (__deregister_frame_info_bases):
Call free() outside of mutex.
EDNS is disabled by default (so there is interoperability issue), and
the fallback code is problematic because it prevents an application
from obtaining DNSSEC data after a FORMERR response.
resolv: Support an exactly sized buffer in ns_name_pack [BZ #21359]
This bug did not affect name resolution because those functions
indirectly call ns_name_pack with a buffer which is always larger
than the generated query packet, even in the case of the
longest-possible domain name.
resolv: Remove internal and unused definitions from <resolv.h>
The RES_F_* constants are only used with the private _res._flags
member. RES_EXHAUSTIVE is unused. The removed function
declarations refer to functions not actually exported by glibc,
so they are unusable by applications.
With new optimized strnlen for POWER8 [1], this patch adds
strncat for power8 to make use of optimized strlen and strnlen.
This is faster than POWER7 current implementation for larger strings.
This patch consolidates all Linux mmap implementations on default
sysdeps/unix/sysv/linux/mmap{64}.c one. To accomodate all required
architecture specific requeriments a new internal header is created
(mmap_internal.h) where each architecture add its specific code
requirements. Currently only x86_64 (to define MMAP_PREPARE to add
MAP_32BITS), s390 (which have a different kernel ABI for mmap), m68k
(which have variable minimum page sizes), and MIPS n32 (which zero
extend the offset to handle negative one correctly) redefine the new
header.
The patch also fixes BZ#21270 where default mmap64 on architectures
which uses mmap2 silent truncates large offsets value (larger than
1 << (page shift + 8 * sizeof (off_t)) or 1<<44 on architectures with
4096 bytes page size). The new consolidate implementation returns
EINVAL as allowed by POSIX.
It also adds a tests for on current tst-mmap-offset one. I have run
a full make check on x86_64, x86_64-32, i686, aarch64, armhf, powerpc,
powerpc64le, sparc64, and sparcv9 without any regressions. I also ran
some basic tests (tst-mmap-offset) on sh4, m68k, and on qemu simulated
MIPS32 and MIPS64.
[BZ #21270]
* posix/tst-mmap-offset.c (do_prepare): New function.
(do_test): Rename to do_test_bz18877 and use FAIL_RET.
(do_test_bz21270): New function.
* sysdeps/unix/sysv/linux/aarch64/mmap.c: Remove file.
* sysdeps/unix/sysv/linux/arm/mmap.c: Remove file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/mmap.c: Likewise.
* sysdeps/unix/sysv/linux/hppa/mmap.c: Likewise.
* sysdeps/unix/sysv/linux/i386/mmap.c: Likewise.
* sysdeps/unix/sysv/linux/m68k/mmap.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/mmap64.c: Likewise.
* sysdeps/unix/sysv/linux/microblaze/mmap.S: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/mmap.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/mmap.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/mmap64.c: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/mmap.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/mmap64.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/mmap.S: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/mmap.c: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/mmap64.c: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/mmap.c: Likewise.
* sysdeps/unix/sysv/linux/mmap_internal.h: New file.
* sysdeps/unix/sysv/linux/m68k/mmap_internal.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/mmap_internal.h: Likewise.
* sysdeps/unix/sysv/linux/s390/mmap_internal.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/mmap_internal.h: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list: Remove mmap
from auto-generation list.
* sysdeps/unix/sysv/linux/mips/mips64/n32/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/wordsize-64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/mmap.c: New file.
* sysdeps/unix/sysv/linux/mmap64.c (__mmap64): Add check for invalid
offsets and support for mmap2 syscall.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/memcmp-power4.S: Define the
implementation-specific function name and remove unneeded
macros definition.
* sysdeps/powerpc/powerpc64/multiarch/memcmp-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memmove-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/power4/memcmp.S: Set a default function
name if not defined and pass as parameter to macros accordingly.
* sysdeps/powerpc/powerpc64/power7/memcmp.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/memmove.S: Likewise.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/memcpy-a2.S: Define the
implementation-specific function name and remove unneeded
macros definition.
* sysdeps/powerpc/powerpc64/multiarch/memcpy-cell.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memcpy-power4.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memcpy-power6.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memcpy-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memcpy-ppc64.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/mempcpy-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/a2/memcpy.S: Set a default function
name if not defined and pass as parameter to macros accordingly.
* sysdeps/powerpc/powerpc64/cell/memcpy.S: Likewise.
* sysdeps/powerpc/powerpc64/memcpy.S: Likewise.
* sysdeps/powerpc/powerpc64/power4/memcpy.S: Likewise.
* sysdeps/powerpc/powerpc64/power6/memcpy.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/memcpy.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/mempcpy.S: Likewise.
powerpc: refactor memchr, memrchr, and rawmemchr IFUNC.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/memchr-power7.S: Define the
implementation-specific function name and remove unneeded macros
definition.
* sysdeps/powerpc/powerpc64/multiarch/memrchr-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/rawmemchr-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/memchr.S: Set a default
function name if not defined and pass as parameter to macros
accordingly.
* sysdeps/powerpc/powerpc64/power7/memrchr.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/rawmemchr.S: Likewise.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/memset-power4.S: Define the
implementation-specific function name and remove unneeded macros
definition.
* sysdeps/powerpc/powerpc64/multiarch/memset-power6.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memset-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memset-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/memset-ppc64.S: Likewise.
* sysdeps/powerpc/powerpc64/memset.S: Set a default function name if
not defined and pass as parameter to macros accordingly.
* sysdeps/powerpc/powerpc64/power4/memset.S: Likewise.
* sysdeps/powerpc/powerpc64/power6/memset.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/memset.S: Likewise.
* sysdeps/powerpc/powerpc64/power8/memset.S: Likewise.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/strcasestr-power8.S: Define the
strcasestr implementation name and remove unneeded macros definition.
* sysdeps/powerpc/powerpc64/multiarch/strstr-power7.S: Define
strstr implementation name and remove unneeded macros definition.
* sysdeps/powerpc/powerpc64/power7/strstr.S: Set a default function
name if not defined and pass as parameter to macros accordingly.
* sysdeps/powerpc/powerpc64/power8/strcasestr.S: Likewise.
powerpc: refactor strchr, strchrnul, and strrchr IFUNC.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/strchr-power7.S: Define the
implementation-specific function name and remove unneeded macros
definition.
* sysdeps/powerpc/powerpc64/multiarch/strchr-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strchrnul-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strchrnul-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strrchr-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/strchr.S: Set a default
function name if not defined and pass as parameter to macros
accordingly.
* sysdeps/powerpc/powerpc64/power7/strchrnul.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/strrchr.S: Likewise.
* sysdeps/powerpc/powerpc64/power8/strchr.S: Likewise.
* sysdeps/powerpc/powerpc64/strchr.S: Likewise.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/strlen-power7.S: Define
the strlen implementation name and remove unneeded macros definition.
* sysdeps/powerpc/powerpc64/multiarch/strlen-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strlen-ppc64.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strnlen-power7.S: Define
the strnlen implementation name and remove unneeded macros definition.
* sysdeps/powerpc/powerpc64/power7/strlen.S: Set a default function
name if not defined and pass as parameter to macros accordingly.
* sysdeps/powerpc/powerpc64/power7/strnlen.S: Likewise.
* sysdeps/powerpc/powerpc64/power8/strlen.S: Likewise.
* sysdeps/powerpc/powerpc64/strlen.S: Likewise.
powerpc: refactor stpcpy, stpncpy, strcpy, and strncpy IFUNC.
Clean up the IFUNC implementations for powerpc in order to remove
unneeded macro definitions.
Tested on ppc64le with and without --disable-multi-arch flag.
* sysdeps/powerpc/powerpc64/multiarch/stpcpy-power8.S: Define the
implementation-specific function name and remove unneeded macros
definition.
* sysdeps/powerpc/powerpc64/multiarch/stpncpy-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/stpncpy-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strcpy-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strncpy-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strncpy-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/strncpy.S: Set a default
function name if not defined.
* sysdeps/powerpc/powerpc64/power8/strcpy.S: Likewise.
* sysdeps/powerpc/powerpc64/power8/strncpy.S: Likewise.
Paul Clarke [Tue, 11 Apr 2017 14:19:28 +0000 (11:19 -0300)]
Support auxilliary vector components for cache geometries.
Add support to getauxval() for new types to get L1, L2, L3 cache sizes,
cache line sizes, and cache associativities. The new types for
getauxval() were added in the stream for Linux kernel v4.11 in commit 98a5f361b8625c6f4841d6ba013bbf0e80d08147.
They only modify the state in the dirstream argument, and we
generally do not treat this as a reason to mark a function as
not thread-safe. For an example, see random_r, which is marked
as thread-safe even though the random state is not protected
by a lock.
This patch moves all arch specific pthreadtypes.h to a similar path
for all architectures (sysdeps/unix/sysv/<arch>/bits). No functional
or build change is expected. The idea is mainly to organize the
header placement for all architectures.
Checked with a build for all major ABI (aarch64-linux-gnu, alpha-linux-gnu,
arm-linux-gnueabi, i386-linux-gnu, ia64-linux-gnu,
m68k-linux-gnu, microblaze-linux-gnu [1], mips{64}-linux-gnu, nios2-linux-gnu,
powerpc{64le}-linux-gnu, s390{x}-linux-gnu, sparc{64}-linux-gnu,
tile{pro,gx}-linux-gnu, and x86_64-linux-gnu).
* sysdeps/unix/sysv/linux/x86/Implies: New file.
* sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h: Move to ...
* sysdeps/alpha/nptl/bits/pthreadtypes.h: ... here.
* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: Move to ...
* sysdeps/powerpc/nptl/bits/pthreadtypes.h: ... here.
* sysdeps/x86/bits/pthreadtypes.h: Move to ...
* sysdeps/x86/nptl/bits/pthreadtypes.h: ... here.
The declarations of many functions in math_private.h are not required
since __MATHDECL and __MATHDECLX, in math.h, already provide the
declarations for these functions. This patch removes the declarations
from math_private.h. It also adds the inclusion of math.h to the files
which depended on the declaration of functions in math_private.h.
Tested for powerpc64le and s390x.
* sysdeps/generic/math_private.h: Remove declarations of
many functions that are already declared in math.h.
* sysdeps/ieee754/ldbl-128/e_logl.c: Include math.h to get the
declaration for __frexpl.
* sysdeps/ieee754/ldbl-128ibm/e_logl.c: Include math.h to get
the declarations for __scalbnl and fabsl.
getopt: annotate files with relationship to gnulib.
As the final act in this patchset, adjust the "This file is part of
the GNU C Library" message at the top of each file to indicate which
files are synced with gnulib.
* posix/bits/getopt_core.h, posix/bits/getopt_ext.h
* posix/getopt.c, posix/getopt1.c, posix/getopt_int.h:
Mention in top-of-file boilerplate that these files are shared
with gnulib.
* posix/getopt.h, posix/bits/getopt_posix.h:
Mention in top-of-file boilerplate that these files are NOT shared
with gnulib, unlike the rest of the getopt implementation.
Zack Weinberg [Sat, 25 Mar 2017 15:24:24 +0000 (11:24 -0400)]
getopt: eliminate __need_getopt by splitting up getopt.h.
__need_getopt is misnamed; what it really means is "we want only the
getopt features specified in POSIX, not the GNU extensions". Because
this code is shared with gnulib, it winds up being cleanest to split
getopt.h into *four* headers. getopt_core.h and getopt_ext.h will
be shared with gnulib, getopt_posix.h will be just for glibc, and
each project will have its own copy of getopt.h.
* posix/bits/getopt_core.h, posix/bits/getopt_ext.h:
New files, intended to be shared with gnulib.
* posix/bits/getopt_posix.h:
New file, not intended to be shared with gnulib.
* posix/getopt.h: Now just includes features.h,
bits/getopt_core.h, and bits/getopt_ext.h. Will
no longer be shared with gnulib.
* include/bits/getopt_core.h, include/bits/getopt_ext.h
* include/bits/getopt_posix.h: New wrappers.
* posix/Makefile: Install new headers.
* posix/unistd.h, libio/stdio.h:
Include bits/getopt_posix.h instead of getopt.h.
gnulib now has annotations on at least some functions to cater to
compilation with -Wunused-parameter. In order to follow suit cleanly,
I've added to libc-symbols.h some of the _GL_* macros that
gnulib-common.m4 puts into config.h. (I don't think they belong in
sys/cdefs.h, at least not without further thought.)
At this point all gnulib-side changes to getopt.c have been merged.
* include/libc-symbols.h: For gnulib compatibility, define
_GL_UNUSED, _GL_UNUSED_LABEL, _GL_ATTRIBUTE_PURE, and
_GL_ATTRIBUTE_CONST.
* posix/getopt.c (_getopt_initialize): Mark argc and argv
parameters with _GL_UNUSED.
In one place, glibc's getopt uses alloca to construct a linked list of
possibilities for an "ambiguous" long option. In gnulib, malloc
should be used instead. Providing for both cases complicates things a
fair bit. Instead of merging straight across, therefore, I have
chosen to rewrite it using a boolean vector instead of a linked list.
There is then only one allocation that might need freeing; in glibc it
can honor __libc_use_alloca as usual, and in gnulib we define
__libc_use_alloca to always be false, so we don't need ifdefs in the
middle of the function. This should also be slightly more efficient
in the normal case of long options being fully spelled out -- I think
most people aren't even aware they _can_ sometimes abbreviate long
options.
One interesting consequence is that the list of possibilities is now
printed in exactly the order they appear in the list of long options,
instead of the first possibility being shuffled to the end. This
shouldn't be a big deal but it did break one test that relied on the
exact text of this error message.
(The reason the previous patch was "in aid of" merging from gnulib is
I didn't want to have to make this change in two places.)
(The patch looks bigger than it really is because there's a fair bit
of reindentation and code rearrangement.)
* posix/getopt.c: When used standalone, define __libc_use_alloca
as always false and alloca to abort if called.
(process_long_option): Rewrite handling of ambiguous long options
to use a single boolean vector, not a linked list; use
__libc_use_alloca to decide whether to allocate this using alloca.
* posix/tst-getopt_long1.c: Adjust text of expected error message.
There were two copies of the bulk of the code to handle long options.
Now there is only one. (Yes, this is in aid of merging from gnulib.)
The change to bug-getopt4.c clarifies the error messages when the test
fails.
* posix/getopt.c (process_long_option): New function split out
from _getopt_internal_r.
(_getopt_internal_r): Replace both copies of the long-option
processing code with calls to process_long_option.
* posix/bug-getopt4.c (one_test): Print argv[0] in error messages.
(do_test): Differentiate argv[0] in the two subtests.
_getopt_data.__posixly_correct is completely redundant to
_getopt_data.__ordering, and some work that logically belongs in
_getopt_initialize was being done by _getopt_internal_r, making the
code harder to understand.
As a side effect, getenv will no longer be called if the first
character of the options string is '+' or '-', which is probably a
Good Thing. (Perhaps we should have a flag character that
specifically asks for the permutation behavior?)
* posix/getopt_int.h (_getopt_data): Remove __posixly_correct field.
* posix/getopt.c (_getopt_internal_r): Move some initialization code...
(_getopt_initialize): ...here. Don't set d->__posixly_correct.
getopt: merge from gnulib: function prototype adjustments
For standards compliance, getopt, getopt_long, and getopt_long_only in
glibc have to take 'char *const *argv' even though they can mutate the
array. gnulib has tried to clean this up as much as possible: all the
internal functions use 'char **argv', and when used standalone, so do
getopt_long and getopt_long_only.
Also brought over are __nonnull annotations, corrections to documentation,
and apparently it is no longer necessary to worry about conflicting
prototypes for getopt. The macroification of the definitions of
getopt and __posix_getopt goes beyond what is currently in gnulib.
At this point getopt1.c and getopt_int.h are identical to their gnulib
versions.
* posix/getopt.h: Add backup definition of __nonnull for
consistency with gnulib. Define __getopt_argv_const to const
if not already defined.
(getopt): Update doc comment from gnulib. Prototype
unconditionally. Add __nonnull annotation.
(__posix_getopt): Add __nonnull annotation.
(getopt_long, getopt_long_only): Use __getopt_argv_const in
prototypes for consistency with gnulib. Add __nonnull
annotations.
* posix/getopt.c (_getopt_initialize, _getopt_internal_r)
(getopt_internal): Change 'argv' argument to type 'char **'.
Remove now-unnecessary casts.
(getopt, __posix_getopt): Eliminate repetition with a macro.
Cast 'argv' to 'char **' when calling _getopt_internal.
* posix/getopt1.c (getopt_long, getopt_long_only):
Use __getopt_argv_const for consistency with gnulib.
Cast 'argv' to 'char **' when calling _getopt_internal.
(_getopt_long_r, _getopt_long_only_r):
Change 'argv' argument to type 'char **'.
(main): Constify 'long_options'.
* posix/getopt_int.h (getopt_internal, _getopt_internal_r)
(_getopt_long_r, _getopt_long_only_r):
Change 'argv' argument to type 'char **'.
getopt can print a whole bunch of error messages, and when used
standalone (from gnulib) it uses fprintf to do that. But fprintf is a
cancellation point and getopt isn't, and also applying fprintf to a
stream in wide-character mode is not allowed.
glibc has an internal function called __fxprintf that writes a narrow
format string to a stream regardless of mode, but it only handles
ASCII format strings, and it's still a cancellation point. getopt's
messages are translated, so they might not be ASCII. So getopt has an
error message to an asprintf buffer, monkeys with internal flag bits
on stderr to disable cancellation, and then calls
__fxprintf(stderr, "%s", buffer). There isn't even a helper function,
the code is duplicated every time.
This patch fixes __fxprintf to handle arbitrary multibyte format
strings, and adds a variant __fxprintf_nocancel that does the same
thing but also isn't a cancellation point. (It still _works_ by
monkeying with internal flag bits on the FILE, but that's not really a
layering violation for code in stdio-common.) All of the #ifdef _LIBC
blocks can then be reduced to their standalone versions with a little
help from some macros at the top of the file.
I also wrote a test case to verify that getopt really isn't a
cancellation point, and I'm glad I did, because it found two bugs, one
of which wasn't even to do with cancellation (see previous patch).
* stdio-common/fxprintf.c (__fxprintf_nocancel): New function.
(locked_vfxprintf): New helper function. Handle arbitrary
multibyte strings, not just ASCII.
* include/stdio.h: Declare __fxprintf_nocancel.
* posix/getopt.c: When _LIBC is defined, define fprintf to
__fxprintf_nocancel, flockfile to _IO_flockfile, and
funlockfile to _IO_funlockfile. When neither _LIBC nor
_POSIX_THREAD_SAFE_FUNCTIONS is defined, define flockfile and
funlockfile as no-ops. (_getopt_internal_r): Remove all
internal #ifdef _LIBC blocks; the standalone error-printing
code can now be used for libc as well. Add an
flockfile/funlockfile pair around one case where the error
message is printed in several chunks. Don't use fputc.
* posix/tst-getopt-cancel.c: New test.
* posix/Makefile: Run it.
getopt: fix fencepost error in ambiguous-W-option handling
getopt_long contains an undocumented (AFAICT) feature in which, if you
put "W;" in the short-options list, then '-W foo' and '-Wfoo' are
treated as equivalent to '--foo'. This is implemented with a partial
second copy of the code for handling long options, and that code
increments optind one too many times when recovering from an ambiguous
abbreviated option, which can cause the main loop to walk past the end
of argv and crash.
I discovered this while writing a test case that tries to exercise all
of getopt's error reporting paths; I wouldn't be surprised to learn
that this feature is never used by real applications.
* posix/getopt.c (_getopt_internal_r): Don't increment
d->optind a second time when reporting ambiguous -W options.
Zack Weinberg [Fri, 31 Mar 2017 11:58:07 +0000 (07:58 -0400)]
getopt: merge straightforward changes from gnulib
This covers changes with little or no consequences when the code is
used in glibc.
* posix/getopt_int.h: Include getopt.h.
Use impl-namespace names for all arguments to _getopt_internal and
_getopt_internal_r.
Declare __ordering enum outside the struct.
Harmonize comments with gnulib.
* posix/getopt1.c: Simplify #ifdeffage at top of file. Remove
ELIDE_CODE logic entirely. Move inclusion of stdlib.h to
#ifdef TEST block and make unconditional. Do not define NULL.
* posix/getopt.c: Partial merge from gnulib, covering the
initial includes and global declarations, commentary, and
a couple of semantically-neutral code changes.
Zack Weinberg [Fri, 31 Mar 2017 11:39:55 +0000 (07:39 -0400)]
getopt: merge from gnulib: don't use `...' quotes
I'm not sure whether this is official GNU style now, but `...' quotes
haven't looked properly balanced in most people's terminal fonts since
2001ish? and gnulib has chosen to switch over to '...' quotes.
I'm merging this separately from the other changes in gnulib because
it's very mechanical.
* posix/getopt.c, posix/getopt.h, posix/getopt1.c, posix/getopt_int.h:
Use '...' instead of `...' for quotation marks inside
comments and strings.
Zack Weinberg [Wed, 29 Mar 2017 20:58:58 +0000 (16:58 -0400)]
getopt: remove USE_NONOPTION_FLAGS
glibc's implementation of getopt includes code to parse an environment
variable named _XXX_GNU_nonoption_argv_flags_ (where XXX is the
current process's PID in decimal); but all of it has been #ifdefed out
since 2001, with no official way to turn it back on.
According to commentary in our config.h.in, bash version 2.0 set this
environment variable to indicate argv elements that were the result of
glob expansion and therefore should not be treated as options, but the
feature was "disabled later" because "it caused problems". According
to bash's CHANGES file, "later" was release 2.01; it gives no more
detail about what the problems were.
Version 2.0 of bash was released on the last day of 1996, and version
2.01 in June of 1997. Twenty years later, I think it is safe to
assume that this environment variable isn't coming back.
* config.h.in (USE_NONOPTION_FLAGS): Remove.
* csu/init-first.c: Remove all #ifdef USE_NONOPTION_FLAGS blocks.
* sysdeps/mach/hurd/i386/init-first.c: Likewise.
* posix/getopt_int.h: Likewise.
* posix/getopt.c: Likewise. Also remove SWAP_FLAGS and the
__libc_argc and __libc_argv externs, which were only used by
#ifdef USE_NONOPTION_FLAGS blocks.
* posix/getopt_init.c: Remove file.
* posix/Makefile (routines): Remove getopt_init.
* include/getopt.h: Don't declare __getopt_initialize_environment.
* manual/getopt.texi: Remove mention of USE_NONOPTION_FLAGS in
a comment.
With the removal of divdi3 object from sparcv9-linux-gnu build, its
definition came from libgcc and its functions internall calls .udiv.
Since glibc also exports these symbols for compatibility reasons, it
will end up creating PLT calls internally in libc.so.
To avoid it, this patch uses the linker option --wrap to replace all
the internal libc.so .udiv calls to the wrapper __wrap_.udiv. Along
with strong alias in the udiv implementations, it makes linker do
local calls.
Checked on sparcv9-linux-gnu.
* sysdeps/sparc/sparc32/Makefile (libc.so-gnulib): New rule.
* sysdeps/sparc/sparc32/sparcv8/udiv.S (.udiv): Make a strong_alias
to __wrap_.udiv.
* sysdeps/sparc/sparc32/sparcv9/udiv.S (.udiv): Likewise.
* sysdeps/sparc/sparc32/udiv.S (.udiv): Likewise.
Build divdi3 only for architecture that required it
As noted in [1], divdi3 object is only exported in a handful ABIs
(i386, m68k, powerpc32, s390-32, and ia64), however it is built
for all current architectures regardless.
This patch refact the make rules for this object to so only the
aforementioned architectures that actually require it builds it.
Also, to avoid internal PLT calls to the exported symbol from the
module, glibc uses an internal header (symbol-hacks.h) which is
unrequired (and in fact breaks the build for architectures that
intend to get symbol definitions from libgcc.a). The patch also
changes it to create its own header (divdi3-symbol-hacks.h) and
adjust the architectures that require it accordingly.
I checked the build/check (with run-built-tests=no) on the
following architectures (which I think must cover all supported
ABI/builds) using GCC 6.3:
I only saw one regression on sparcv9-linux-gnu (extra PLT call to
.udiv) which I address in next patch in the set. It also correctly
build SH with GCC 7.0.1 (without any regression from c89721e25d).
May be tricky for otimized implementations to handle strings around
page boundary once, for instance, it is performed unaligned loads or
when maxlen is used as a hint for vectorized loops. The test cases
should unveil regression bugs on these cases.
To some extend do_random_tests in string/test-strnlen tests strings
placed at page end but it does not cover all cases. So this change
adds tests which consists of placing strings of varying sizes ending
at the page boundary. It also combines with different values of maxlen.
Tested on ppc64le and x86_64.
* string/test-strnlen.c (do_page_tests): New function
to check length of strings ending at the page boundary.
(test_main): Added call to the do_page_tests function.
Added strnlen POWER8 otimized for long strings. It delivers
same performance as POWER7 implementation for short strings.
This takes advantage of reasonably performing unaligned loads
and bit permutes to check the first 1-16 bytes until
quadword aligned, then checks in 64 bytes strides until unsafe,
then 16 bytes, truncating the count if need be.
Likewise, the POWER7 code is recycled for less than 32 bytes strings.
Tested on ppc64 and ppc64le.
* sysdeps/powerpc/powerpc64/multiarch/Makefile
(sysdep_routines): Add strnlen-power8.
* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
(strnlen): Add __strnlen_power8 to list of strnlen functions.
* sysdeps/powerpc/powerpc64/multiarch/strnlen-power8.S:
New file.
* sysdeps/powerpc/powerpc64/multiarch/strnlen.c
(__strnlen): Add __strnlen_power8 to ifunc list.
* sysdeps/powerpc/powerpc64/power8/strnlen.S: New file.
This patch removes CALL_THREAD_FCT macro usage and its defition for
x86. For 32 bits it usage is only for force 16 stack alignment,
however stack is already explicit aligned in clone syscall. For
64 bits and x32 it just a function call and there is no need to
code it with inline assembly.
Checked on i686-linux-gnu, x86_64-linux-gnu, and x86_64-linux-gnu-x32.
The new cond var implementation (ed19993b5b0d) removed all the
__ASSUME_{REQUEUE_PI,FUTEX_LOCK_PI} internal usage so there is no
need to keep defining it. This patch removes all USE_REQUEUE_PI
and __ASSUME_REQUEUE_PI. It is as follow up from BZ#18463.
Checked with a build for x86_64-linux-gnu, arm-linux-gnueabhf,
m68-linux-gnu, mips64-linux-gnu, and sparc64-linux-gnu.
projects / thirdparty / glibc.git / log
