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.
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.
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.
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.
* sysdeps/x86/cpu-features.c (init_cpu_features): Set
Prefer_No_VZEROUPPER if AVX512ER is available.
* sysdeps/x86/cpu-features.h
(bit_cpu_AVX512PF): New.
(bit_cpu_AVX512ER): Likewise.
(bit_cpu_AVX512CD): Likewise.
(bit_cpu_AVX512BW): Likewise.
(bit_cpu_AVX512VL): Likewise.
(index_cpu_AVX512PF): Likewise.
(index_cpu_AVX512ER): Likewise.
(index_cpu_AVX512CD): Likewise.
(index_cpu_AVX512BW): Likewise.
(index_cpu_AVX512VL): Likewise.
(reg_AVX512PF): Likewise.
(reg_AVX512ER): Likewise.
(reg_AVX512CD): Likewise.
(reg_AVX512BW): Likewise.
(reg_AVX512VL): Likewise.
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.
__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.
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.
Tested on powerpc64 and powerpc64le.
[1] https://sourceware.org/ml/libc-alpha/2017-03/msg00491.html
* sysdeps/powerpc/powerpc64/multiarch/Makefile (sysdep_routines): Add
strncat-power8.
* sysdeps/powerpc/powerpc64/multiarch/strncat.c (strncat): Add
__strncat_power8 to ifunc list.
* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
(strncat): Add __strncat_power8 to list of strncat functions.
* sysdeps/powerpc/powerpc64/multiarch/strncat-power8.c: New file.
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.
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.
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.
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/strcasecmp_l-power7.S: Define
the implementation-specific function name and remove unneeded
macros definition.
* sysdeps/powerpc/powerpc64/multiarch/strcmp-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strcmp-power8.S Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strcmp-power9.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strcmp-ppc64.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strncmp-power8.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strncmp-power9.S: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S: Likewise.
* sysdeps/powerpc/powerpc64/power4/strncmp.S: Set a default function
name if not defined and pass as parameter to macros accordingly.
* sysdeps/powerpc/powerpc64/power7/strcmp.S: Likewise.
* sysdeps/powerpc/powerpc64/power7/strncmp.S: Likewise.
* sysdeps/powerpc/powerpc64/power8/strcmp.S: Likewise.
* sysdeps/powerpc/powerpc64/power8/strncmp.S: Likewise.
* sysdeps/powerpc/powerpc64/power9/strcmp.S: Likewise.
* sysdeps/powerpc/powerpc64/power9/strncmp.S: Likewise.
* sysdeps/powerpc/powerpc64/strcmp.S: Likewise.
* sysdeps/powerpc/powerpc64/strncmp.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/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.
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.
Add sysdeps/x86/dl-procinfo.c for x86 version of processor capability
information to reduce duplication between i386 and x86_64 dl-procinfo.c.
* sysdeps/i386/dl-procinfo.c: Include
<sysdeps/x86/dl-procinfo.c>.
* sysdeps/x86_64/dl-procinfo.c: Likewise.
* sysdeps/x86/dl-procinfo.c: New file.
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.
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.
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:
aarch64-linux-gnu
alpha-linux-gnu
arm-linux-gnueabihf
hppa-linux-gnu
ia64-linux-gnu
m68k-linux-gnu
microblaze-linux-gnu
mips64-n32-linux-gnu
mips-linux-gnu
mips64-linux-gnu
nios2-linux-gnu
powerpc-linux-gnu
powerpc-linux-gnu-power4
powerpc64-linux-gnu
powerpc64le-linux-gnu
s390x-linux-gnu
s390-linux-gnu
sh4-linux-gnu
sh4-linux-gnu-soft
sparc64-linux-gnu
sparcv9-linux-gnu
tilegx-linux-gnu
tilegx-linux-gnu-32
tilepro-linux-gnu
x86_64-linux-gnu
x86_64-linux-gnu-x32
i686-linux-gnu
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).
[1] https://sourceware.org/ml/libc-alpha/2017-03/msg00243.html
* sysdeps/i386/symbol-hacks.h: New file.
* sysdeps/m68k/symbol-hacks.h: New file.
* sysdeps/powerpc/powerpc32/symbol-hacks.h: New file.
* sysdeps/s390/s390-32/symbol-hacks.h: New file.
* sysdeps/unix/sysv/linux/i386/Makefile
[$(subdir) = csu] (sysdep_routines): New rule: divdi3 object.
[$(subdir) = csu] (sysdep-only-routines): Likewise.
[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
* sysdeps/unix/sysv/linux/m68k/Makefile
[$(subdir) = csu] (sysdep_routines): Likewise.
[$(subdir) = csu] (sysdep-only-routines): Likewise.
[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
[$(subdir) = csu] (sysdep_routines): Likewise.
[$(subdir) = csu] (sysdep-only-routines): Likewise.
[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/Makefile
[$(subdir) = csu] (sysdep_routines): Likewise.
[$(subdir) = csu] (sysdep-only-routines): Likewise.
[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
* sysdeps/wordsize-32/Makefile: Remove file.
* sysdeps/wordsize-32/symbol-hacks.h: Definitions move to ...
* sysdeps/wordsize-32/divdi3-symbol-hacks.h: ... here.
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.
* nptl/pthread_create.c (START_THREAD_DEFN): Remove
CALL_THREAD_FCT macro usage.
* sysdeps/i386/nptl/tls.h (CALL_THREAD_FCT): Remove definition.
* sysdeps/x86_64/nptl/tls.h (CALL_THREAD_FCT): Likewise.
* sysdeps/x86_64/32/nptl/tls.h: Remove file.
The new cond var implementation (ed19993b5b) 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.
* nptl/pthreadP.h (USE_REQUEUE_PI): Remove ununsed macro.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_REQUEUE_PI): Likewise.
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_REQUEUE_PI): Likewise.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_REQUEUE_PI): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_REQUEUE_PI): Likewise.
* sysdeps/unix/sysv/linux/sparc/kernel-features.h
(__ASSUME_REQUEUE_PI): Likewise.
This patch also clobbers r14 in TLS_LD, TLS_GD macros on 31bit.
This ensures that r14 isn't used to save and restore r12 while
r14 is clobbered by the bas-instruction.
As note:
r12 can't be added to clobber list as gcc would fail with:
error: PIC register clobbered by ‘12’ in ‘asm’
For 64bit this fix was already done in 2004 in the
commit b80af23ac6.
ChangeLog:
* sysdeps/s390/s390-32/tls-macros.h (TLS_LD, TLS_GD):
Clobber also r14.
When glibc is built with -fstack-check, trying to use posix_spawn can
lead to segfaults due to gcc internally probing stack memory too far.
The new spawn API will allocate a minimum of 1 page, but the stack
checking logic might probe a couple of pages. When it tries to walk
them, everything falls apart.
The gcc internal docs [1] state the default interval checking is one
page. Which means we need two pages (the current one, and the next
probed). No target currently defines it larger.
Further, it mentions that the default minimum stack size needed to
recover from an overflow is 4/8KiB for sjlj or 8/12KiB for others.
But some Linux targets (like mips and ppc) go up to 16KiB (and some
non-Linux targets go up to 24KiB).
Let's create each child with a minimum of 32KiB slack space to support
them all, and give us future breathing room.
No test is added as existing ones crash. Even a simple call is
enough to trigger the problem:
char *argv[] = { "/bin/ls", NULL };
posix_spawn(NULL, "/bin/ls", NULL, NULL, argv, NULL);
[1] https://gcc.gnu.org/onlinedocs/gcc-6.3.0/gccint/Stack-Checking.html
This patch fixes some test-errno-linux unexpected returns for the
tested syscalls on some older kernels (I saw it on a Linux 3.8 on
armv7l). Basically:
- inotify_add_watch: Linux v3.8 (676a0675c) removed the test to
check at least one valid bit in flags (to return EINVAL). It
was later added back in v3.9 (04df32fa1).
- quotactl: returns ENOSYS for kernels not configured with
CONFIG_QUOTA.
Checked on x86_64-linux-gnu and armv7l-linux-gnueabihf.
* sysdeps/unix/sysv/linux/test-errno-linux.c (do_test): Handle
non expected inotify_add_watch and quotactl return.
The implementation of __ieee754_rem_pio2l in ldbl-128, ldbl-128ibm,
and ldbl-96 return the type int32_t, whereas math_private.h declares
it as returning int. This patch changes the declaration to match the
declaration in thoses directories, as well as it changes the stub
implementation in math/e_rem_pio2l.c, similarly.
* math/e_rem_pio2l.c (__ieee754_rem_pio2l): Change return type
to int32_t.
* sysdeps/generic/math_private.h: Declare __ieee754_rem_pio2l
as returning int32_t.
This patch fixes the regression added by 23d2770 for final address
overflow calculation. The subtraction of the considered size (16)
at line 120 is at wrong place, for sizes less than 16 subsequent
overflow check will not take in consideration an invalid size (since
the subtraction will be negative). Also, the lea instruction also
does not raise the carry flag (CF) that is used in subsequent jbe
to check for overflow.
The fix is to follow x86_64 logic from 3daef2c where the overflow
is first check and a sub instruction is issued. In case of resulting
negative size, CF will be set by the sub instruction and a NULL
result will be returned. The patch also add similar tests reported
in bug report.
Checked on i686-linux-gnu and x86_64-linux-gnu.
* string/test-memchr.c (do_test): Add BZ#21182 checks for address
near end of a page.
* sysdeps/i386/i686/multiarch/memchr-sse2.S (__memchr): Fix
overflow calculation.
termios.h should define IUCLC for UNIX98 and older XSI standards. The
sysdeps/unix/sysv/linux/alpha version defines it only if __USE_MISC,
so causing some conform/ tests to fail.
Other versions define it unconditionally (I* being a reserved
namespace for this header); the API should be consistent between
architectures in the absence of a clear reason for it to differ (and
given that a symbol is part of the API on two architectures, I don't
see any reason for the feature test macros required ever to differ
between those architectures), so this patch makes the alpha version
define it unconditionally as well. Two non-POSIX macros alongside it,
IMAXBEL and IUTF8, are also defined unconditionally on other
architectures, so this patch makes them consistent by defining them
unconditionally on alpha as well.
Tested (compilation only) with build-many-glibcs.py.
[BZ #21277]
* sysdeps/unix/sysv/linux/alpha/bits/termios.h (IUCLC): Define
unconditionally.
(IMAXBEL): Likewise.
(IUTF8): Likewise.
On Skylake server, _dl_runtime_resolve_avx512_opt is used to preserve
the first 8 vector registers. The code layout is
if only %xmm0 - %xmm7 registers are used
preserve %xmm0 - %xmm7 registers
if only %ymm0 - %ymm7 registers are used
preserve %ymm0 - %ymm7 registers
preserve %zmm0 - %zmm7 registers
Branch predication always executes the fallthrough code path to preserve
%zmm0 - %zmm7 registers speculatively, even though only %xmm0 - %xmm7
registers are used. This leads to lower CPU frequency on Skylake
server. This patch changes the fallthrough code path to preserve
%xmm0 - %xmm7 registers instead:
if whole %zmm0 - %zmm7 registers are used
preserve %zmm0 - %zmm7 registers
if only %ymm0 - %ymm7 registers are used
preserve %ymm0 - %ymm7 registers
preserve %xmm0 - %xmm7 registers
Tested on Skylake server.
[BZ #21258]
* sysdeps/x86_64/dl-trampoline.S (_dl_runtime_resolve_opt):
Define only if _dl_runtime_resolve is defined to
_dl_runtime_resolve_sse_vex.
* sysdeps/x86_64/dl-trampoline.h (_dl_runtime_resolve_opt):
Fallthrough to _dl_runtime_resolve_sse_vex.
POSIX specifies long as the type of elements of struct mq_attr. For
x32, they are __syscall_slong_t (i.e. long long). This patch XFAILs
the corresponding tests for x32 in the conformtest expectations (the
bug should not be closed without an actual fix).
Tested with build-many-glibcs.py.
[BZ #21279]
* sysdeps/unix/sysv/linux/x86_64/x32/Makefile
[$(subdir) = conform] (conformtest-xfail-conds): Update comment.
* conform/data/mqueue.h-data (mq_attr.mq_flags): XFAIL for
x86_64-x32-linux.
(mq_attr.mq_maxmsg): Likewise.
(mq_attr.mq_msgsize): Likewise.
(mq_attr.mq_curmsgs): Likewise.
MIPS o32 struct stat has the wrong type of st_rdev. This patch XFAILs
that test in the conformtest expectations for this case (the bug
should not be closed without an actual fix, however).
Tested with build-many-glibcs.py.
[BZ #21278]
* sysdeps/unix/sysv/linux/mips/mips32/Makefile
[$(subdir) = conform] (conformtest-xfail-conds): Update comment.
* conform/data/sys/stat.h-data (stat.st_rdev): XFAIL for
mips-o32-linux.
sysdeps/unix/sysv/linux/alpha/bits/termios.h defines NL2 and NL3 for
__USE_MISC || __USE_XOPEN. These should only be defined for
__USE_MISC as they are not part of any standard namespace. This patch
conditions them accordingly, matching the powerpc version of the
header (the only other one in glibc that defines these macros).
Tested (compilation only) with build-many-glibcs.py.
[BZ #21268]
* sysdeps/unix/sysv/linux/alpha/bits/termios.h (NL2): Define only
if [__USE_MISC]
(NL3): Likewise.
The ia64-specific clone2 call expects the base of the stack mapping and
the stack size as sep arguments, not an initial stack value as on other
stack-grows-down architectures. Reuse the stack-grows-up macro so we
pass in the right stack base.
Reported-by: Matt Turner <mattst88@gentoo.org>
If a link (say /proc/self/fd/0) pointing to a device, say /dev/pts/2, in a
parent mount namespace is passed to ttyname, and a /dev/pts/2 exists (in a
different devpts) in the current namespace, then it returns /dev/pts/2.
But /dev/pts/2 is NOT the current tty, it is a different file and device.
Detect this case and return ENODEV. Userspace can choose to take this as a hint
that the fd points to a tty device but to act on the fd rather than the link.
Signed-off-by: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This patch XFAILs the conformtest tv_nsec tests for x32 so that the
incorrect type does not potentially hide other failures. As this is
not a fix for the bug, it should remain open in Bugzilla.
Tested (compilation only) with build-many-glibcs.py.
[BZ #16437]
* sysdeps/unix/sysv/linux/x86_64/x32/Makefile
[$(subdir) = conform] (conformtest-xfail-conds): New variable.
* conform/data/signal.h-data (timespec.tv_nsec): XFAIL for
x86_64-x32-linux.
* conform/data/sys/select.h-data (timespec.tv_nsec): Likewise.
* conform/data/sys/stat.h-data (timespec.tv_nsec): Likewise.
* conform/data/time.h-data (timespec.tv_nsec): Likewise.
sysdeps/unix/sysv/linux/sparc/bits/setjmp.h defines 64-bit __jmp_buf
with a load of identifiers that are not part of any standard
namespace, resulting in conform/ tests failing. This patch fixes this
by moving those identifiers to the implementation namespace, so
enabling the conform/ tests to pass for sparc64.
Tested (compilation only) for sparc64 with build-many-glibcs.py.
[BZ #21261]
* sysdeps/unix/sysv/linux/sparc/bits/setjmp.h
[__WORDSIZE == 64 && !_ASM] (__sparc64_jmp_buf): Use reserved
names for all fields.
* sysdeps/sparc/sparc64/jmpbuf-unwind.h (_JMPBUF_UNWINDS): Update
for jmp_buf field renaming.
(_JMPBUF_UNWINDS_ADJ): Likewise.
sysdeps/unix/sysv/linux/alpha/bits/termios.h defines IXANY only if
__USE_MISC. But it's in the base standard for POSIX.1:2008, and
XSI-shaded in previous standards. This patch makes the header define
it unconditionally, like other versions of this header do (it's always
reserved by standards that don't require it, so defining
unconditionally is OK by the standards).
Tested (compilation only) for alpha with build-many-glibcs.py. Note
that there are still termios.h conformtest failures after this patch
because of other issues with the alpha version of this header.
[BZ #21259]
* sysdeps/unix/sysv/linux/alpha/bits/termios.h (IXANY): Define
unconditionally, not just for [__USE_MISC].
As noted in bug 17786, MIPS o32 struct stat has the wrong type of
st_dev. This patch XFAILs that test in the conformtest expectations
for this case (the test still fails after the patch because there's
also a similar issue for st_rdev that needs reporting and XFAILing
separately, and the bug should not be closed without an actual fix,
not just XFAILing).
Tested for mips with build-many-glibcs.py.
[BZ #17786]
* sysdeps/unix/sysv/linux/mips/mips32/Makefile: New file.
* conform/data/sys/stat.h-data (stat.st_dev): XFAIL for
mips-o32-linux.
As noted in bug 21260, sysdeps/unix/sysv/linux/alpha/bits/netdb.h
defines struct netent with n_net of type unsigned long instead of the
correct uint32_t. This patch XFAILs that test in the conformtest
expectations for alpha. (This is not a fix for the bug, and it should
not be closed without an actual fix.)
Tested for alpha with build-many-glibcs.py.
[BZ #21260]
* sysdeps/unix/sysv/linux/alpha/Makefile
[$(subdir) = conform] (conformtest-xfail-conds): New variable.
glibc headers include some code (not particularly consistent or
systematic) to put various declarations in C++ namespaces std and
__c99, if _GLIBCPP_USE_NAMESPACES is defined.
As noted in <https://gcc.gnu.org/ml/libstdc++/2017-03/msg00025.html>,
this macro was removed from libstdc++ in 2000. I don't expect
compilation with such old versions of libstdc++ to work with current
glibc headers anyway (whereas old *binaries* are expected to stay
working with current glibc); this patch (which should be a no-op with
any libstdc++ version postdating that removal) removes all this code
from the glibc headers.
The begin-end-check.pl test, whose comments say it is about checking
these namespace macro calls, is also removed. The code in that test
would have covered __BEGIN_DECLS / __END_DECLS as well, but if those
weren't properly matched it would show up with the
check-installed-headers-cxx tests, so I don't think there is an actual
use for keeping begin-end-check.pl with the namespace code removed.
Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).
* misc/sys/cdefs.h (__BEGIN_NAMESPACE_STD): Remove macro.
(__END_NAMESPACE_STD): Likewise.
(__USING_NAMESPACE_STD): Likewise.
(__BEGIN_NAMESPACE_C99): Likewise.
(__END_NAMESPACE_C99): Likewise.
(__USING_NAMESPACE_C99): Likewise.
* math/math.h (_Mdouble_BEGIN_NAMESPACE): Do not define and
undefine macro.
(_Mdouble_END_NAMESPACE): Likewise.
* ctype/ctype.h: Do not handle C++ namespaces.
* libio/bits/stdio-ldbl.h: Likewise.
* libio/stdio.h: Likewise.
* locale/locale.h: Likewise.
* math/bits/mathcalls.h: Likewise.
* setjmp/setjmp.h: Likewise.
* signal/signal.h: Likewise.
* stdlib/bits/stdlib-float.h: Likewise.
* stdlib/bits/stdlib-ldbl.h: Likewise.
* stdlib/stdlib.h: Likewise.
* string/string.h: Likewise.
* sysdeps/x86/fpu/bits/mathinline.h: Likewise.
* time/bits/types/clock_t.h: Likewise.
* time/bits/types/struct_tm.h: Likewise.
* time/bits/types/time_t.h: Likewise.
* time/time.h: Likewise.
* wcsmbs/bits/wchar-ldbl.h: Likewise.
* wcsmbs/uchar.h: Likewise.
* wcsmbs/wchar.h: Likewise.
[_GLIBCPP_USE_NAMESPACES] (wint_t): Remove conditional definition.
* wctype/wctype.h: Do not handle C++ namespaces.
* scripts/begin-end-check.pl: Remove.
* Makefile (installed-headers): Likewise.
(tests-special): Do not add $(objpfx)begin-end-check.out.
($(objpfx)begin-end-check.out): Remove.
When glibc is compiled with gcc 6.2 that has been configured with
to default to PIC/PIE, the static version of __mempcpy_chk is not built,
as the test is done on PIC instead of SHARED. Fix the test to check for
SHARED, like it is done for similar functions like __memcpy_chk.
2017-03-12 Mike Frysinger <vapier@gentoo.org>
* sysdeps/x86_64/mempcpy_chk.S (__mempcpy_chk): Check for SHARED
instead of PIC.
Bug 21094 reports 3ulp errors of cosf and tanf for certain arguments
near pi/2 arising from the use of an insufficiently accurate range
reduction. (To be clear, this is a quality-of-implementation issue
relating to the apparent intent of those particular cosf and tanf
implementations; 3ulp is within the general glibc accuracy goals, so
not inherently a bug.)
This patch fixes that error by making a wider range of cases use the
existing more accurate range reduction for arguments close to pi/2.
The wider range of values is still narrow enough for the "z -=
pio2_2;" in the more accurate case to be exact, as the code expects.
Tested for x86_64, x86 and mips64; no ulps updates needed (but at
least on mips64, the larger ulps were seen if the tests were added
without the substantive fix).
[BZ #21094]
* sysdeps/ieee754/flt-32/e_rem_pio2f.c (__ieee754_rem_pio2f): Use
24+24+24-bit pi for wider range of values around pi/2.
* math/auto-libm-test-in: Add more tests of cos and tan.
* math/auto-libm-test-out-cos: Regenerated.
* math/auto-libm-test-out-tan: Likewise.
This patch fixes multiple issues of test-errno.c (9a56f87183):
- Rename Linux test-errno.c to test-errno-linux.c to avoid build
the same source for both tests.
- Add a mlock check for 32 bits build running on 64 bits kernels.
Althuough man pages states that mlock fails with EINVAL if final
address overflows, kernels does not return it for aforementioned
condition (it returns ENOMEM instead). Although it seems to be
a kernel issue for compat syscall handling, I think it is worth
to still check syscall return and document the behavior.
- Initialize option lenght for setsockopt check.
- Change open test from EINVAL to EISDIR.
Checked on x86_64-linux-gnu and i686-linux-gnu (running on 64 bits
kernel).
* posix/test-errno.c (do_test): Initialize setsockopt optlen.
* sysdeps/unix/sysv/linux/test-errno.c: Move to ...
* sysdeps/unix/sysv/linux/test-errno-linux.c: ... here.
(test_wrp_rv): Fix format.
(test_wrp_rv2): New macro.
(do_test): Handle mlock return on 64 bits kernels with 32 bits
binaries.
x86_64 libmvec tests have been failing to build lately with GCC
mainline with -Wuninitialized errors, and Markus Trippelsdorf traced
this to an aliasing issue
<https://sourceware.org/ml/libc-alpha/2017-03/msg00169.html>.
This patch fixes the aliasing issue, so that the vectors-of-pointers
are initialized using a union instead of pointer casts. This also
fixes the testsuite build failures with GCC mainline.
Tested for x86_64 (full testsuite with GCC 6; testsuite build with GCC
mainline with build-many-glibcs.py).
* sysdeps/x86/fpu/test-math-vector-sincos.h (INIT_VEC_PTRS_LOOP):
Use a union when storing pointers.
(VECTOR_WRAPPER_fFF_2): Do not take address of integer vector and
cast result when passing to INIT_VEC_PTRS_LOOP.
(VECTOR_WRAPPER_fFF_3): Likewise.
(VECTOR_WRAPPER_fFF_4): Likewise.
This patch fixes the missing posix_fadvise64 symbol for static build
required for _FILE_OFFSET_BITS=64 on mips64 build.
Checked on a mips64-linux-gnu build with run-built-tests=no.
[BZ #21232]
* sysdeps/unix/sysv/linux/mips/mips64/n64/posix_fadvise64.c: Add
posix_fadvise64 weak_alias for static build.
Thanks David Michael for the suggestion.
* sysdeps/mach/hurd/send.c (__send): Convert hurdish error code into
posix error code.
* sysdeps/mach/hurd/recv.c (__recv): Likewise.
calls with constant strings shows a small (~10%) performance gain, strdup is
typically used in error reporting code, so not performance critical.
Remove the now unused __need_malloc_and_calloc related defines from stdlib.h.
Rename existing uses of str(n)dup to __str(n)dup so it no longer needs to be
redirected to a builtin. Also building GLIBC with -Os now no longer shows
localplt or linkname space failures (partial fix for BZ #15105 and BZ #19463).
[BZ #15105]
[BZ #19463]
* elf/dl-cache.c (_dl_load_cache_lookup): Use __strdup.
* inet/rcmd.c (rcmd_af): Likewise.
* inet/rexec.c (rexec_af): Likewise.
* intl/dcigettext.c (_LIBC): Likewise.
* intl/finddomain.c (_nl_find_domain): Use strdup expansion.
* locale/loadarchive.c (_nl_load_locale_from_archive): Use __strdup.
* locale/setlocale.c (setlocale): Likewise.
* posix/spawn_faction_addopen.c
(posix_spawn_file_actions_addopen): Likewise.
* stdlib/putenv.c (putenv): Use __strndup.
* sunrpc/svc_simple.c (__registerrpc): Use __strdup.
* sysdeps/posix/getaddrinfo.c (gaih_inet): Use __strdup/__strndup.
* include/stdlib.h (__need_malloc_and_calloc): Remove uses.
(__Need_M_And_C) Remove define/undef.
* stdlib/stdlib.h (__need_malloc_and_calloc): Remove uses.
(__malloc_and_calloc_defined): Remove define.
* string/bits/string2.h (__strdup): Remove define.
(strdup): Likewise.
(__strndup): Likewise.
(strndup): Likewise.
Linux 4.10 adds IPV6_RECVFRAGSIZE to include/uapi/linux/in6.h, which
shows that several such IPV6_* macros are missing from glibc's
sysdeps/unix/sysv/linux/bits/in.h (while older ones are present). I
don't know whether any of these might be deliberately omitted, but
this patch adds what appear to be the missing more recent macros to
glibc.
Tested for x86_64.
* sysdeps/unix/sysv/linux/bits/in.h (IPV6_AUTOFLOWLABEL): New
macro.
(IPV6_ADDR_PREFERENCES): Likewise.
(IPV6_MINHOPCOUNT): Likewise.
(IPV6_ORIGDSTADDR): Likewise.
(IPV6_RECVORIGDSTADDR): Likewise.
(IPV6_TRANSPARENT): Likewise.
(IPV6_UNICAST_IF): Likewise.
(IPV6_RECVFRAGSIZE): Likewise.
Build glibc for sh4-unknown-linux-gnu currently fails if one's
using GCC5/6: in dl-conflict.c, the elf_machine_rela() function
is called with NULL as its 3rd argument, sym. The implementation
of that function in sysdeps/sh/dl-machine.h dereferences that pointer:
const Elf32_Sym *const refsym = sym;
...
if (map == &GL(dl_rtld_map))
value -= map->l_addr + refsym->st_value + reloc->r_addend;
GCC discovers a null pointer dereference, and in accordance with
-fdelete-null-pointer-checks (which is enabled in -O2) replaces this
code with a trap - which, as SH does not implement a trap pattern in
GCC, evaluates to an abort() call. This abort() call pulls many more
objects from libc_nonshared.a, eventually resulting in link failure
due to multiple definitions for a number of symbols.
As far as I see, the conditional before this code is always false in
rtld: _dl_resolve_conflicts() is called with main_map as the first
argument, not GL(_dl_rtld_map), but since that call is in yet another
compilation unit, GCC does not know about it. Patch that wraps this
conditional into !defined RESOLVE_CONFLICT_FIND_MAP attached.
* sysdeps/sh/dl-machine.h (elf_machine_rela): The condition
in R_SH_DIR32 case is always false when inlined from
dl-conflict.c. Ifdef out to prevent GCC from insertin an
abort() call.
Fix 60f9423b type for alpha kernel-features.h definition.
* sysdeps/unix/sysv/linux/alpha/kernel-features.h
(__ASSUME_RECV_SYSCALL): Replace duplicate by
__ASSUME_SEND_SYSCALL.
I've used gmp 6.1.2, mpfr 3.1.5 and upstream mpc with fix in mpc_atan
(https://scm.gforge.inria.fr/anonscm/gitweb?p=mpc/mpc.git;a=commit;h=958aac9b15a659d6fb5edcb11778123f8a35b14f)
to build gen-auto-libm-tests and regenerated catan / catanh out files.
Regenerated ULPs for s390 from scratch. Now the catan / catanh tests
are passing.
ChangeLog:
* math/auto-libm-test-out-catan: Regenerated.
* math/auto-libm-test-out-catanh: Likewise.
* sysdeps/s390/fpu/libm-test-ulps: Likewise.
This patch regenerates MIPS catan and catanh ulps for long double with
fixed expected results for the tests of those functions. ulps for
other types (which may see variation depending on whether glibc is
built for a processor with fused multiply-add support) are
deliberately not reduced. ulps are not regenerated for powerpc-nofpu
as such regeneration does not result in any changes for long double.
* sysdeps/mips/mips64/libm-test-ulps: Update catan and catanh ulps
for long double with corrected test expectations.
This patch consolidates the send Linux syscall implementation on
sysdeps/unix/sysv/linux/send{to}.c. The changes are:
1. Remove send from auto-generation syscalls.list on the architecture
that uses __NR_send.
2. Define __NR_send for architectures that supports it. It was done instead
of defining in default kernel-features.h because current Linux practice
for new ports are to implement only __NR_sendto [1] and it will
require adding new kernel-features for ports that do not require it
(aarch64 for instance).
3. Remove __ASSUME_SENDTO_FOR_SEND_SYSCALL and decide to use
__NR_sendto for send generation based on __ASSUME_SENDTO_SYSCALL.
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/sysdep.h (HAVE_INTERNAL_SEND_SYMBOL):
Define.
* sysdeps/unix/sysv/linux/aarch64/sysdep.h
(HAVE_INTERNAL_SEND_SYMBOL): Undefine.
* sysdeps/unix/sysv/linux/nios2/sysdep.h
(HAVE_INTERNAL_SEND_SYMBOL): Likewise.
* sysdeps/unix/sysv/linux/tile/sysdep.h
(HAVE_INTERNAL_SEND_SYMBOL): Likewise.
* sysdeps/unix/sysv/linux/alpha/kernel-features.h
(__ASSUME_RECV_SYSCALL): Define.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/hppa/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/ia64/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Remove define.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove send from
auto-generation list.
* sysdeps/unix/sysv/linux/arm/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list: Likewike.
* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/send.c: Simplify includes.
(__ASSUME_SENDTO_FOR_SEND_SYSCALL): Replace by
__ASSUME_SENDTO_SYSCALL.
* sysdeps/unix/sysv/linux/x86_64/send.c: Remove file.
* sysdeps/unix/sysv/linux/mips/mips64/send.c: Likewise.
* sysdeps/unix/sysv/linux/generic/send.c: Likewise.
This patch consolidates the recv Linux syscall implementation on
sysdeps/unix/sysv/linux/recv.c. The changes are:
1. Remove recv from auto-generation syscalls.list on the architecture
that uses __NR_recv.
2. Define __NR_recv for architectures that supports it. It was done
instead of defining in default kernel-features.h because current Linux
practice for new ports is to implement only __NR_recvfrom [1] and it will
require adding new kernel-features for ports that do not require it
(aarch64 for instance).
3. Remove __ASSUME_RECVFROM_FOR_RECV_SYSCALL and decide to use
__NR_recvfrom for recv generation based on __ASSUME_RECVFROM_SYSCALL.
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/alpha/syscalls.list: Remove recv from
auto-generation list.
* sysdeps/unix/sysv/linux/arm/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/alpha/kernel-features.h
(__ASSUME_RECV_SYSCALL): New define.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/hppa/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/ia64/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_RECV_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_RECVFROM_FOR_RECV_SYSCALL): Remove define.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_RECVFROM_FOR_RECV_SYSCALL): Remove define.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_RECVFROM_FOR_RECV_SYSCALL): Remove define.
* sysdeps/unix/sysv/linux/generic/recv.c: Remove file.
* sysdeps/unix/sysv/linux/mips/mips64/recv.c: Likewise.
* sysdeps/unix/sysv/linux/x86_64/recv.c: Likewise.
* sysdeps/unix/sysv/linux/recv.c: Simplify includes.
(__libc_recv): Use __ASSUME_RECVFROM_SYSCALL instead of
__ASSUME_RECVFROM_FOR_RECV_SYSCALL to issue recvfrom syscall.
[1] include/asm-generic/unistd.h (__ARCH_WANT_SYSCALL_DEPRECATED)
This patch consolidates the connect Linux syscall implementation on
sysdeps/unix/sysv/linux/accept.c. The changes are:
1. Remove connect from auto-generation syscalls.list on the architecture
that uses __NR_connect.
2. Define __NR_connect as default (__ASSUME_CONNECT_SYSCALL) and undef for
architectures that do not support it.
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/alpha/syscalls.list: Remove connect from
auto-generation list.
* sysdeps/unix/sysv/linux/arm/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/connect.c: Simplify include list.
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_CONNECT_SYSCALL): Define.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_CONNECT_SYSCALL): Undef if kernel does not support it.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_CONNECT_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_CONNECT_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/sparc/kernel-features.h
(__ASSUME_CONNECT_SYSCALL): Likewise.
This patch consolidates the accept Linux syscall implementation on
sysdeps/unix/sysv/linux/accept.c. The changes are:
1. Remove accept from auto-generation syscalls.list on the architecture
that uses __NR_accept.
2. Define __NR_accept as default (__ASSUME_ACCEPT_SYSCALL) and undef for
architectures that do not support it.
3. Remove __ASSUME_ACCEPT4_FOR_ACCEPT_SYSCALL and decide to use
__NR_accept4 for accept generation based on __ASSUME_ACCEPT4_SYSCALL.
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/accept.c (__libc_accept): Replace
__ASSUME_ACCEPT4_FOR_ACCEPT_SYSCALL by __ASSUME_ACCEPT4_SYSCALL.
* sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove accept from
auto-generation list.
* sysdeps/unix/sysv/linux/arm/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list: Likewise.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_ACCEPT4_FOR_ACCEPT_SYSCALL): Remove define.
(__ASSUME_ACCEPT_SYSCALL): Undefine.
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_ACCEPT_SYSCALL): New define.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_ACCEPT4_FOR_ACCEPT_SYSCALL): Remove define.
(__ASSUME_ACCEPT_SYSCALL): Define wheter kernel version supports.
* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
(__ASSUME_ACCEPT_SYSCALL): Define.
* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
(__ASSUME_ACCEPT_SYSCALL): Undefine.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_ACCEPT4_FOR_ACCEPT_SYSCALL): Remove define.
(__ASSUME_ACCEPT_SYSCALL): Undefine.
* sysdeps/unix/sysv/linux/sh/kernel-features.h
(__ASSUME_ACCEPT_SYSCALL): Undefine.
* sysdeps/unix/sysv/linux/sparc/kernel-features.h
(__ASSUME_ACCEPT_SYSCALL): Undefine for 32 bits.
This patch adds tests for POSIX and Linux specific syscalls
that implemented with syscall templates machinery. The reason
of tests is to receive the expected error code and test if
it's handled properly by glibc.
2017-03-08 Yury Norov <ynorov@caviumnetworks.com>
Zack Weinberg <zackw@panix.com>
* posix/test-errno.c: New file.
* posix/Makefile (tests): Add test-errno.
* sysdeps/unix/sysv/linux/test-errno.c: New file.
* sysdeps/unix/sysv/linux/Makefile (tests): Add test-errno.
The LD_HWCAP_MASK environment variable may alter the selection of
function variants for some architectures. For AT_SECURE process it
means that if an outdated routine has a bug that would otherwise not
affect newer platforms by default, LD_HWCAP_MASK will allow that bug
to be exploited.
To be on the safe side, ignore and disable LD_HWCAP_MASK for setuid
binaries.
[BZ #21209]
* elf/rtld.c (process_envvars): Ignore LD_HWCAP_MASK for
AT_SECURE processes.
* sysdeps/generic/unsecvars.h: Add LD_HWCAP_MASK.
* elf/tst-env-setuid.c (test_parent): Test LD_HWCAP_MASK.
(test_child): Likewise.
* elf/Makefile (tst-env-setuid-ENV): Add LD_HWCAP_MASK.
In 1e5834c38a ("Refactor Linux ipc_priv header") a different
approach to passing __IPC_64 as zero was created. Hppa kernel ABI
requires to oass __IPC_64 as zero since it does not set
CONFIG_ARCH_WANT_IPC_PARSE_VERSION in the kernel.
Checked on hppa-linux-gnu with some adjustments to avoid BZ#21016
(basically by removing hppa compat implementations and adjusting
required headers).
* sysdeps/unix/sysv/linux/hppa/ipc_priv.h: New file.
This patch activates C11 atomic builtins by defining
USE_ATOMIC_COMPILER_BUILTINS to 1.
Note:
E.g. in nptl/pthread_key_delete.c if compiled with GCCs 6 and before,
an extra stack-frame is generated and the old value is stored on stack
before cs instruction but it never loads this value from stack.
An unreleased GCC 7 omit those stack operations.
E.g. in nptl/pthread_once.c the condition code of cs instruction is
evaluated by a sequence of ipm, sra, compare and jump instructions instead
of one conditional jump instruction. This also occurs with an unreleased
GCC 7.
These shortcomings does not really hurt. Nevertheless, the gcc guys are
investigating those ones and plan to fix them before GCC 7 release.
The atomic_fetch_abc_def C11 builtins are now using load-and-abc instructions
on z196 zarch and higher cpus instead of a loop with compare-and-swap
instruction.
Some of the non-C11 atomic macros from include/atomic.h are now implemented
with help of the C11 atomic builtins. The other non-C11 atomic macros
are using the macros defined here.
ChangeLog:
* sysdeps/s390/atomic-machine.h
(USE_ATOMIC_COMPILER_BUILTINS): Define to 1.
(__arch_compare_and_exchange_val_8_acq,
__arch_compare_and_exchange_val_16_acq,
__arch_compare_and_exchange_val_32_acq,
__arch_compare_and_exchange_val_64_acq):
Delete macro.
(atomic_compare_and_exchange_val_acq,
atomic_compare_and_exchange_val_rel,
atomic_compare_and_exchange_bool_acq,
catomic_compare_and_exchange_bool_acq,
atomic_exchange_acq, atomic_exchange_rel,
atomic_exchange_and_add_acq,
atomic_exchange_and_add_rel,
catomic_exchange_and_add, atomic_or_val,
atomic_or, catomic_or, atomic_bit_test_set,
atomic_and_val, atomic_and, catomic_and):
Define macros with help of C11 atomic builtins.
posix/wordexp-test.c used libc-internal.h for PTR_ALIGN_DOWN; similar
to what was done with libc-diag.h, I have split the definitions of
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN
to a new header, libc-pointer-arith.h.
It then occurred to me that the remaining declarations in libc-internal.h
are mostly to do with early initialization, and probably most of the
files including it, even in the core code, don't need it anymore. Indeed,
only 19 files actually need what remains of libc-internal.h. 23 others
need libc-diag.h instead, and 12 need libc-pointer-arith.h instead.
No file needs more than one of them, and 16 don't need any of them!
So, with this patch, libc-internal.h stops including libc-diag.h as
well as losing the pointer arithmetic macros, and all including files
are adjusted.
* include/libc-pointer-arith.h: New file. Define
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and
PTR_ALIGN_DOWN here.
* include/libc-internal.h: Definitions of above macros
moved from here. Don't include libc-diag.h anymore either.
* posix/wordexp-test.c: Include stdint.h and libc-pointer-arith.h.
Don't include libc-internal.h.
* debug/pcprofile.c, elf/dl-tunables.c, elf/soinit.c, io/openat.c
* io/openat64.c, misc/ptrace.c, nptl/pthread_clock_gettime.c
* nptl/pthread_clock_settime.c, nptl/pthread_cond_common.c
* string/strcoll_l.c, sysdeps/nacl/brk.c
* sysdeps/unix/clock_settime.c
* sysdeps/unix/sysv/linux/i386/get_clockfreq.c
* sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
* sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
* sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c:
Don't include libc-internal.h.
* elf/get-dynamic-info.h, iconv/loop.c
* iconvdata/iso-2022-cn-ext.c, locale/weight.h, locale/weightwc.h
* misc/reboot.c, nis/nis_table.c, nptl_db/thread_dbP.h
* nscd/connections.c, resolv/res_send.c, soft-fp/fmadf4.c
* soft-fp/fmasf4.c, soft-fp/fmatf4.c, stdio-common/vfscanf.c
* sysdeps/ieee754/dbl-64/e_lgamma_r.c
* sysdeps/ieee754/dbl-64/k_rem_pio2.c
* sysdeps/ieee754/flt-32/e_lgammaf_r.c
* sysdeps/ieee754/flt-32/k_rem_pio2f.c
* sysdeps/ieee754/ldbl-128/k_tanl.c
* sysdeps/ieee754/ldbl-128ibm/k_tanl.c
* sysdeps/ieee754/ldbl-96/e_lgammal_r.c
* sysdeps/ieee754/ldbl-96/k_tanl.c, sysdeps/nptl/futex-internal.h:
Include libc-diag.h instead of libc-internal.h.
* elf/dl-load.c, elf/dl-reloc.c, locale/programs/locarchive.c
* nptl/nptl-init.c, string/strcspn.c, string/strspn.c
* malloc/malloc.c, sysdeps/i386/nptl/tls.h
* sysdeps/nacl/dl-map-segments.h, sysdeps/x86_64/atomic-machine.h
* sysdeps/unix/sysv/linux/spawni.c
* sysdeps/x86_64/nptl/tls.h:
Include libc-pointer-arith.h instead of libc-internal.h.
* elf/get-dynamic-info.h, sysdeps/nacl/dl-map-segments.h
* sysdeps/x86_64/atomic-machine.h:
Add multiple include guard.
These are a grab bag of changes where the testsuite was using internal
symbols of some variety, but this was straightforward to fix, and the
fixed code should work with or without the change to compile the
testsuite under _ISOMAC.
Four of these are just more #include adjustments, but I want to highlight
sysdeps/powerpc/fpu/tst-setcontext-fpscr.c, which appears to have been
written before the advent of sys/auxv.h. I think a big chunk of this file
could be replaced by a simple call to getauxval, but I'll let someone who
actually has a powerpc machine to test on do that.
dlfcn/tst-dladdr.c was including ldsodefs.h just so it could use
DL_LOOKUP_ADDRESS to print an additional diagnostic; as requested by Carlos,
I have removed this.
math/test-misc.c was using #ifndef NO_LONG_DOUBLE, which is an internal
configuration macro, to decide whether to do certain tests involving
'long double'. I changed the test to #if LDBL_MANT_DIG > DBL_MANT_DIG
instead, which uses only public float.h macros and is equivalent on
all supported platforms. (Note that NO_LONG_DOUBLE doesn't mean 'the
compiler doesn't support long double', it means 'long double is the
same as double'.)
tst-writev.c has a configuration macro 'ARTIFICIAL_LIMIT' that the
Makefiles are expected to define, and sysdeps/unix/sysv/linux/Makefile
was using the internal __getpagesize in the definition; changed to
sysconf(_SC_PAGESIZE) which is the POSIX equivalent.
ia64-linux doesn't supply 'clone', only '__clone2', which is not
defined in the public headers(!) All the other clone tests have local
extern declarations of __clone2, but tst-clone.c doesn't; it was
getting away with this because include/sched.h does declare __clone2.
* nss/tst-cancel-getpwuid_r.c: Include nss.h.
* string/strcasestr.c: No need to include config.h.
* sysdeps/powerpc/fpu/tst-setcontext-fpscr.c: Include
sys/auxv.h. Don't include sysdep.h.
* sysdeps/powerpc/tst-set_ppr.c: Don't include dl-procinfo.h.
* dlfcn/tst-dladdr.c: Don't include ldsodefs.h. Don't use
DL_LOOKUP_ADDRESS.
* math/test-misc.c: Instead of testing NO_LONG_DOUBLE, test whether
LDBL_MANT_DIG is greater than DBL_MANT_DIG.
* sysdeps/unix/sysv/linux/Makefile (CFLAGS-tst-writev.c): Use
sysconf (_SC_PAGESIZE) instead of __getpagesize in definition
of ARTIFICIAL_LIMIT.
* sysdeps/unix/sysv/linux/tst-clone.c [__ia64__]: Add extern
declaration of __clone2.
A few 'long double'-related tests include math_private.h just for
their variety of math_ldbl.h, which contains macros for assembling and
disassembling the binary representation of 'long double'. math_ldbl.h
insists on being included from math_private.h, but if we relax this
restriction (and fix some portability sloppiness) we can use it
directly and not have to expose all of math_private.h to the testsuite.
* sysdeps/generic/math_private.h: Use __BIG_ENDIAN and
__LITTLE_ENDIAN, not BIG_ENDIAN and LITTLE_ENDIAN.
* sysdeps/generic/math_ldbl.h
* sysdeps/ia64/fpu/math_ldbl.h
* sysdeps/ieee754/ldbl-128/math_ldbl.h
* sysdeps/ieee754/ldbl-128ibm/math_ldbl.h
* sysdeps/ieee754/ldbl-96/math_ldbl.h
* sysdeps/powerpc/fpu/math_ldbl.h
* sysdeps/x86_64/fpu/math_ldbl.h:
Allow direct inclusion. Use uintNN_t instead of u_intNN_t.
Use __BIG_ENDIAN and __LITTLE_ENDIAN, not BIG_ENDIAN and
LITTLE_ENDIAN. Include endian.h and/or stdint.h if necessary.
Add copyright notices.
* sysdeps/ieee754/ldbl-128ibm/math_ldbl.h (ldbl_canonicalize_int):
Don't use EXTRACT_WORDS64.
* sysdeps/ieee754/ldbl-96/test-canonical-ldbl-96.c
* sysdeps/ieee754/ldbl-96/test-totalorderl-ldbl-96.c
* sysdeps/ieee754/ldbl-128ibm/test-canonical-ldbl-128ibm.c
* sysdeps/ieee754/ldbl-128ibm/test-totalorderl-ldbl-128ibm.c:
Include math_ldbl.h, not math_private.h.
At present, libm tests for each function get built into a single
executable (for each floating point type, for each of normal / inline
/ finite-math-only functions, plus vector variants) and run together,
resulting in a single PASS or FAIL (for each of those nine variants
plus vector variants). Building this executable involves reading
over 50 MB of libm-test-*.c sources.
This patch arranges for tests of each function to be run separately
from the makefiles instead. There are 121 functions being tested for
each (type, variant pair) (actually 126, but run as 121 from the
Makefile because each of the pairs (exp10, pow10), (isfinite, finite),
(lgamma, gamma), (remainder, drem), (scalbn, ldexp), shares a table of
test results and so is run together), so 1089 separate tests run from
the Makefile, plus 48 vector tests on x86_64 (six functions for eight
vector variants). Each test only involves a libm-test-<func>.c file
of no more than about 4 MB, rather than all such files taking about 50
MB. With tests run separately, test summaries will indicate which
functions actually have problems (of course, those problems may just
be out-of-date libm-test-ulps files if the file hasn't been updated
for the architecture in question recently).
All the .c files for the 1089+48 tests are generated automatically
from the Makefiles. Various checked-in boilerplate .c files are
removed as no longer needed. CFLAGS definitions for the different
kinds of tests are generated using makefile iterators to apply
target-specific variable settings. libm-have-vector-test.h is no
longer needed; the list of functions to test for each vector type is
now in the sysdeps Makefile.
This should reduce the amount of boilerplate needed for float128
testing support; test-float128.h will still be needed, but not various
.c files or Makefile CFLAGS definitions. The logic for creating
dependencies on libm-test-support-*.o files should also render
<https://sourceware.org/ml/libc-alpha/2017-02/msg00279.html>
unnecessary.
Tested for x86_64 and x86.
* math/Makefile (libm-tests-generated): Remove variable.
(libm-tests-base-normal): New variable.
(libm-tests-base-finite): Likewise.
(libm-tests-base-inline): Likewise.
(libm-tests-base): Likewise.
(libm-tests-normal): Likewise.
(libm-tests-finite): Likewise.
(libm-tests-inline): Likewise.
(libm-tests-vector): Likewise.
(libm-tests): Define in terms of these new variables.
(libm-tests-for-type): New variable.
(libm-tests.o): Move definition.
(tests): Move addition of $(libm-tests).
(generated): Update for new and removed libm test files.
($(objpfx)libm-test.c): Remove target.
($(objpfx)libm-have-vector-test.h): Likewise.
(CFLAGS-test-double-vlen2.c): Remove variable.
(CFLAGS-test-double-vlen4.c): Likewise.
(CFLAGS-test-double-vlen8.c): Likewise.
(CFLAGS-test-float-vlen4.c): Likewise.
(CFLAGS-test-float-vlen8.c): Likewise.
(CFLAGS-test-float-vlen16.c): Likewise.
(CFLAGS-test-float.c): Likewise.
(CFLAGS-test-float-finite.c): Likewise.
(CFLAGS-libm-test-support-float.c): Likewise.
(CFLAGS-test-double.c): Likewise.
(CFLAGS-test-double-finite.c): Likewise.
(CFLAGS-libm-test-support-double.c): Likewise.
(CFLAGS-test-ldouble.c): Likewise.
(CFLAGS-test-ldouble-finite.c): Likewise.
(CFLAGS-libm-test-support-ldouble.c): Likewise.
(libm-test-inline-cflags): New variable.
(CFLAGS-test-ifloat.c): Remove variable.
(CFLAGS-test-idouble.c): Likewise.
(CFLAGS-test-ildouble.c): Likewise.
($(addprefix $(objpfx), $(libm-tests.o))): Move target and update
dependencies.
($(foreach t,$(libm-tests-normal),$(objpfx)$(t).c)): New rule.
($(foreach t,$(libm-tests-finite),$(objpfx)$(t).c)): Likewise.
($(foreach t,$(libm-tests-inline),$(objpfx)$(t).c)): Likewise.
($(foreach t,$(libm-tests-vector),$(objpfx)$(t).c)): Likewise.
($(foreach t,$(types),$(objpfx)libm-test-support-$(t).c)):
Likewise.
(dependencies on libm-test-support-*.o): Remove.
($(foreach f,$(libm-test-funcs-all),$(objpfx)$(o)-$(f).o)): New
rules using iterators.
($(addprefix $(objpfx),$(call libm-tests-for-type,$(o)))):
Likewise.
($(objpfx)libm-test-support-$(o).o): Likewise.
($(addprefix $(objpfx),$(filter-out $(tests-static)
$(libm-vec-tests),$(tests)))): Filter out $(libm-tests-vector)
instead.
($(addprefix $(objpfx), $(libm-vec-tests))): Use iterator to
define rule instead.
* math/README.libm-test: Update.
* math/libm-test-acos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-acosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-asin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-asinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-atan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-atan2.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-atanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cabs.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cacos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cacosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-canonicalize.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-carg.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-casin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-casinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-catan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-catanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cbrt.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ccos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ccosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ceil.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cexp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cimag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-clog.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-clog10.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-conj.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-copysign.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cosh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cpow.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-cproj.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-creal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-csin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-csinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-csqrt.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ctan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ctanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-erf.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-erfc.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-exp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-exp10.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-exp2.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-expm1.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fabs.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fdim.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-floor.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fma.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmax.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmaxmag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fminmag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fmod.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fpclassify.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-frexp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fromfp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-fromfpx.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-getpayload.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-hypot.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ilogb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-iscanonical.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-iseqsig.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isfinite.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isgreater.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isgreaterequal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isinf.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isless.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-islessequal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-islessgreater.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isnan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isnormal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-issignaling.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-issubnormal.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-isunordered.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-iszero.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-j0.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-j1.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-jn.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-lgamma.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-llogb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-llrint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-llround.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log10.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log1p.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-log2.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-logb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-lrint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-lround.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-modf.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nearbyint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nextafter.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nextdown.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nexttoward.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-nextup.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-pow.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-remainder.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-remquo.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-rint.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-round.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-roundeven.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-scalb.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-scalbln.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-scalbn.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-setpayload.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-setpayloadsig.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-signbit.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-significand.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sin.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sincos.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sinh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-sqrt.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-tan.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-tanh.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-tgamma.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-totalorder.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-totalordermag.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-trunc.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ufromfp.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-ufromfpx.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-y0.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-y1.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-yn.inc: Include libm-test-driver.c.
(do_test): New function.
* math/libm-test-driver.c: Do not include libm-have-vector-test.h.
(HAVE_VECTOR): Remove macro.
(START): Do not call HAVE_VECTOR.
* math/test-double-vlen2.h (FUNC_TEST): Remove macro.
* math/test-double-vlen4.h (FUNC_TEST): Remove macro.
* math/test-double-vlen8.h (FUNC_TEST): Remove macro.
* math/test-float-vlen16.h (FUNC_TEST): Remove macro.
* math/test-float-vlen4.h (FUNC_TEST): Remove macro.
* math/test-float-vlen8.h (FUNC_TEST): Remove macro.
* math/test-math-vector.h (FUNC_TEST): New macro.
(WRAPPER_DECL): Rename to WRAPPER_DECL_f.
* sysdeps/x86_64/fpu/Makefile (double-vlen2-funcs): New variable.
(double-vlen4-funcs): Likewise.
(double-vlen4-avx2-funcs): Likewise.
(double-vlen8-funcs): Likewise.
(float-vlen4-funcs): Likewise.
(float-vlen8-funcs): Likewise.
(float-vlen8-avx2-funcs): Likewise.
(float-vlen16-funcs): Likewise.
(CFLAGS-test-double-vlen4-avx2.c): Remove variable.
(CFLAGS-test-float-vlen8-avx2.c): Likewise.
* sysdeps/x86_64/fpu/test-double-vlen4.h (TEST_VECTOR_cos): Remove
macro.
(TEST_VECTOR_sin): Likewise.
(TEST_VECTOR_sincos): Likewise.
(TEST_VECTOR_log): Likewise.
(TEST_VECTOR_exp): Likewise.
(TEST_VECTOR_pow): Likewise.
* sysdeps/x86_64/fpu/test-double-vlen8.h (TEST_VECTOR_cos):
Likewise.
(TEST_VECTOR_sin): Likewise.
(TEST_VECTOR_sincos): Likewise.
(TEST_VECTOR_log): Likewise.
(TEST_VECTOR_exp): Likewise.
(TEST_VECTOR_pow): Likewise.
* sysdeps/x86_64/fpu/test-float-vlen16.h (TEST_VECTOR_cosf):
Likewise.
(TEST_VECTOR_sinf): Likewise.
(TEST_VECTOR_sincosf): Likewise.
(TEST_VECTOR_logf): Likewise.
(TEST_VECTOR_expf): Likewise.
(TEST_VECTOR_powf): Likewise.
* sysdeps/x86_64/fpu/test-float-vlen8.h (TEST_VECTOR_cosf):
Likewise.
(TEST_VECTOR_sinf): Likewise.
(TEST_VECTOR_sincosf): Likewise.
(TEST_VECTOR_logf): Likewise.
(TEST_VECTOR_expf): Likewise.
(TEST_VECTOR_powf): Likewise.
* math/gen-libm-have-vector-test.sh: Remove file.
* math/libm-test.inc: Likewise.
* math/libm-test-support-double.c: Likewise.
* math/libm-test-support-float.c: Likewise.
* math/libm-test-support-ldouble.c: Likewise.
* math/test-double-finite.c: Likewise.: Likewise.
* math/test-double.c: Likewise.
* math/test-float-finite.c: Likewise.
* math/test-float.c: Likewise.
* math/test-idouble.c: Likewise.
* math/test-ifloat.c: Likewise.
* math/test-ildouble.c: Likewise.
* math/test-ldouble-finite.c: Likewise.
* math/test-ldouble.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen2.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen2.h: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen4-avx2.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen4.c: Likewise.
* sysdeps/x86_64/fpu/test-double-vlen8.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen16.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen4.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen4.h: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen8-avx2.c: Likewise.
* sysdeps/x86_64/fpu/test-float-vlen8.c: Likewise.
Several wrappers for IEEE functions use _LIB_VERSION / matherr /
__kernel_standard functionality, which we want to obsolete. New
wrappers, such as for float128, must not use this functionality.
This patch adds new wrappers that only __set_errno and can be used by
the new float128 wrappers.
Tested for powerpc64le.
* math/Makefile: Add wrappers to gen-libm-calls.
* math/w_acos_template.c: New file.
* math/w_acosh_template.c: Likewise.
* math/w_asin_template.c: Likewise.
* math/w_atan2_template.c: Likewise.
* math/w_atanh_template.c: Likewise.
* math/w_cosh_template.c: Likewise.
* math/w_exp10_template.c: Likewise.
* math/w_exp2_template.c: Likewise.
* math/w_exp_template.c: Likewise.
* math/w_fmod_template.c: Likewise.
* math/w_hypot_template.c: Likewise.
* math/w_j0_template.c: Likewise.
* math/w_j1_template.c: Likewise.
* math/w_jn_template.c: Likewise.
* math/w_lgamma_r_template.c: Likewise.
* math/w_lgamma_template.c: Likewise.
* math/w_log10_template.c: Likewise.
* math/w_log2_template.c: Likewise.
* math/w_log_template.c: Likewise.
* math/w_pow_template.c: Likewise.
* math/w_remainder_template.c: Likewise.
* math/w_sinh_template.c: Likewise.
* math/w_sqrt_template.c: Likewise.
* math/w_tgamma_template.c: Likewise.: Likewise.
* sysdeps/generic/math-type-macros-double.h
(__USE_WRAPPER_TEMPLATE): New macro to control inclusion of
the new wrappers.
* sysdeps/generic/math-type-macros-float.h: Likewise.
* sysdeps/generic/math-type-macros-ldouble.h: Likewise.
In Linux 4.10, timerfd constants moved to a new uapi header, which
showed up that glibc's sys/timerfd.h is missing the old flag
TFD_TIMER_CANCEL_ON_SET. This patch adds that flag to glibc's header.
Tested for x86_64.
* sysdeps/unix/sysv/linux/sys/timerfd.h (TFD_TIMER_CANCEL_ON_SET):
New enum constant and macro.
Linux 4.10 adds a new IP_RECVFRAGSIZE macro to
include/uapi/linux/in.h. This patch adds it to glibc's
sysdeps/unix/sysv/linux/bits/in.h.
Tested for x86_64.
* sysdeps/unix/sysv/linux/bits/in.h (IP_RECVFRAGSIZE): New macro.
The sys/platform/ppc.h header defines a class of __ppc_set_ppr functions
used to set the Program Priority Register (PPR) in PowerPC.
This patch implements test cases for these functions.
Tested on ppc64le, ppc64, and ppc.
* sysdeps/powerpc/tst-set_ppr.c: New file.
Implement test cases for __ppc_set_ppr_* functions.
* sysdeps/powerpc/Makefile ($(subdir),misc): Add tst-set_ppr
in the list of tests.
Change the powerpc tests to use <support/test-driver.c>.
Also replace some of pthread calls to its xpthread equivalent.
Tested on ppc64le.
* sysdeps/powerpc/test-get_hwcap.c: Use <support/test-driver.c>
instead of test-skeleton.c.
(do_test): Replaced pthread_create and pthread_join with
xpthread_create and xpthread_join. Use TEST_VERIFY_EXIT macro.
Removed unneeded status variable.
* sysdeps/powerpc/test-gettimebase.c: Use <support/test-driver.c>
instead of test-skeleton.c.
* sysdeps/powerpc/tst-tlsopt-powerpc.c: Likewise.
Commit 6b1df8b27f fixed the -OS build issue on i386 (BZ#20729) by
expliciting disabling frame pointer (-fomit-frame-pointer) on the
faulty objects. Although it does fix the issue, it is a subpar
workaround that adds complexity in build process (a rule for each
object to add the required compiler option and pontentially more
rules for objects that call {INLINE,INTERNAL}_SYSCALL) and does not
allow the implementations to get all the possible debug/calltrack
information possible (used mainly in debuggers and performance
measurement tools).
This patch fixes it by adding an explicit configure check to see
if -fno-omit-frame-pointer is set and to act accordingly (set or
not OPTIMIZE_FOR_GCC_5). The make rules is simplified and only
one is required: to add libc-do-syscall on loader due mmap
(which will be empty anyway for default build with
-fomit-frame-pointer).
Checked on i386-linux-gnu with GCC 6.2.1 with CFLAGS sets as
'-Os', '-O2 -fno-omit-frame-pointer', and '-O2 -fomit-frame-pointer'.
For '-Os' the testsuite issues described by BZ#19463 and BZ#15105
still applied.
It fixes BZ #21029, although it is marked as duplicated of #20729
(I reopened to track this cleanup).
[BZ #21029]
* config.h.in [CAN_USE_REGISTER_ASM_EBP]: New define.
* sysdeps/unix/sysv/linux/i386/Makefile
[$(subdir) = elf] (sysdep-dl-routines): Add libc-do-syscall.
(uses-6-syscall-arguments): Remove.
[$(subdir) = misc] (CFLAGS-epoll_pwait.o): Likewise.
[$(subdir) = misc] (CFLAGS-epoll_pwait.os): Likewise.
[$(subdir) = misc] (CFLAGS-mmap.o): Likewise.
[$(subdir) = misc] (CFLAGS-mmap.os): Likewise.
[$(subdir) = misc] (CFLAGS-mmap64.o): Likewise.
[$(subdir) = misc] (CFLAGS-mmap64.os): Likewise.
[$(subdir) = misc] (CFLAGS-pselect.o): Likewise.
[$(subdir) = misc] (cflags-pselect.o): Likewise.
[$(subdir) = misc] (cflags-pselect.os): Likewise.
[$(subdir) = misc] (cflags-rtld-mmap.os): Likewise.
[$(subdir) = sysvipc] (cflags-semtimedop.o): Likewise.
[$(subdir) = sysvipc] (cflags-semtimedop.os): Likewise.
[$(subdir) = io] (CFLAGS-posix_fadvise64.o): Likewise.
[$(subdir) = io] (CFLAGS-posix_fadvise64.os): Likewise.
[$(subdir) = io] (CFLAGS-posix_fallocate.o): Likewise.
[$(subdir) = io] (CFLAGS-posix_fallocate.os): Likewise.
[$(subdir) = io] (CFLAGS-posix_fallocate64.o): Likewise.
[$(subdir) = io] (CFLAGS-posix_fallocate64.os): Likewise.
[$(subdir) = io] (CFLAGS-sync_file_range.o): Likewise.
[$(subdir) = io] (CFLAGS-sync_file_range.os): Likewise.
[$(subdir) = io] (CFLAGS-fallocate.o): Likewise.
[$(subdir) = io] (CFLAGS-fallocate.os): Likewise.
[$(subdir) = io] (CFLAGS-fallocate64.o): Likewise.
[$(subdir) = io] (CFLAGS-fallocate64.os): Likewise.
[$(subdir) = nptl] (CFLAGS-pthread_rwlock_timedrdlock.o):
Likewise.
[$(subdir) = nptl] (CFLAGS-pthread_rwlock_timedrdlock.os):
Likewise.
[$(subdir) = nptl] (CFLAGS-pthread_rwlock_timedrwlock.o):
Likewise.
[$(subdir) = nptl] (CFLAGS-pthread_rwlock_timedrwlock.os):
Likewise.
[$(subdir) = nptl] (CFLAGS-sem_wait.o): Likewise.
[$(subdir) = nptl] (CFLAGS-sem_wait.os): Likewise.
[$(subdir) = nptl] (CFLAGS-sem_timedwait.o): Likewise.
[$(subdir) = nptl] (CFLAGS-sem_timedwait.os): Likewise.
* sysdeps/unix/sysv/linux/i386/configure.ac: Add check if compiler allows
ebp on inline assembly.
* sysdeps/unix/sysv/linux/i386/configure: Regenerate.
* sysdeps/unix/sysv/linux/i386/sysdep.h (OPTIMIZE_FOR_GCC_5):
Set if CAN_USE_REGISTER_ASM_EBP is set.
(check_consistency): Likewise.
This patch moves tests of catan and catanh with finite inputs (other
than the divide-by-zero cases producing an exact infinity) to using
the auto-libm-test machinery. Each of auto-libm-test-out-catan and
auto-libm-test-out-catanh takes about three seconds to generate on my
system (so in fact it wasn't necessary after all to defer the move to
auto-libm-test-* until the output files were split up by function).
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add tests of catan and catanh.
* math/auto-libm-test-out-catan: New generated file.
* math/auto-libm-test-out-catanh: Likewise.
* math/libm-test-catan.inc (catan_test_data): Use AUTO_TESTS_c_c.
Move tests with finite inputs, except divide-by-zero cases, to
auto-libm-test-in.
* math/libm-test-catanh.inc (catanh_test_data): Likewise.
* math/Makefile (libm-test-funcs-auto): Add catan and catanh.
(libm-test-funcs-noauto): Remove catan and catanh.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
This patch moves tests of casin and casinh with finite inputs to using
the auto-libm-test machinery. Each of auto-libm-test-out-casin and
auto-libm-test-out-casinh takes about 38 minutes to generate on my
system because of MPC slowness on special cases that appear in the
tests (with MPC 1.0.3; I don't know to what extent current MPC master
might speed it up).
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add tests of casin and casinh.
* math/auto-libm-test-out-casin: New generated file.
* math/auto-libm-test-out-casinh: Likewise.
* math/libm-test-casin.inc (casin_test_data): Use AUTO_TESTS_c_c.
Move tests with finite inputs to auto-libm-test-in.
* math/libm-test-casinh.inc (casinh_test_data): Likewise.
* math/Makefile (libm-test-funcs-auto): Add casin and casinh.
(libm-test-funcs-noauto): Remove casin and casinh.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
This patch moves tests of cacos and cacosh with finite inputs to using
the auto-libm-test machinery. Each of auto-libm-test-out-cacos and
auto-libm-test-out-cacosh takes about 80 minutes to generate on my
system because of MPC slowness on special cases that appear in the
tests (with MPC 1.0.3; I don't know to what extent current MPC master
might speed it up).
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add tests of cacos and cacosh.
* math/auto-libm-test-out-cacos: New generated file.
* math/auto-libm-test-out-cacosh: Likewise.
* math/libm-test-cacos.inc (cacos_test_data): Use AUTO_TESTS_c_c.
Move tests with finite inputs to auto-libm-test-in.
* math/libm-test-cacosh.inc (cacosh_test_data): Likewise.
* math/Makefile (libm-test-funcs-auto): Add cacos and cacosh.
(libm-test-funcs-noauto): Remove cacos and cacosh.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Revert:
2017-02-16 Zack Weinberg <zackw@panix.com>
* sysdeps/x86_64/fpu/math-tests-arch.h: Include cpu-features.h.
Don't include init-arch.h.
* sysdeps/x86_64/multiarch/test-multiarch.h: Include cpu-features.h.
Don't include init-arch.h.
* crypt/md5.h: Test _LIBC with #if defined, not #if.
* dirent/opendir-tst1.c: Include sys/stat.h.
* dirent/tst-fdopendir.c: Include sys/stat.h.
* dirent/tst-fdopendir2.c: Include stdlib.h.
* dirent/tst-scandir.c: Include stdbool.h.
* elf/tst-auditmod1.c: Include link.h and stddef.h.
* elf/tst-tls15.c: Include stdlib.h.
* elf/tst-tls16.c: Include stdlib.h.
* elf/tst-tls17.c: Include stdlib.h.
* elf/tst-tls18.c: Include stdlib.h.
* iconv/tst-iconv6.c: Include endian.h.
* iconvdata/bug-iconv11.c: Include limits.h.
* io/test-utime.c: Include stdint.h.
* io/tst-faccessat.c: Include sys/stat.h.
* io/tst-fchmodat.c: Include sys/stat.h.
* io/tst-fchownat.c: Include sys/stat.h.
* io/tst-fstatat.c: Include sys/stat.h.
* io/tst-futimesat.c: Include sys/stat.h.
* io/tst-linkat.c: Include sys/stat.h.
* io/tst-mkdirat.c: Include sys/stat.h and stdbool.h.
* io/tst-mkfifoat.c: Include sys/stat.h and stdbool.h.
* io/tst-mknodat.c: Include sys/stat.h and stdbool.h.
* io/tst-openat.c: Include stdbool.h.
* io/tst-readlinkat.c: Include sys/stat.h.
* io/tst-renameat.c: Include sys/stat.h.
* io/tst-symlinkat.c: Include sys/stat.h.
* io/tst-unlinkat.c: Include stdbool.h.
* libio/bug-memstream1.c: Include stdlib.h.
* libio/bug-wmemstream1.c: Include stdlib.h.
* libio/tst-fwrite-error.c: Include stdlib.h.
* libio/tst-memstream1.c: Include stdlib.h.
* libio/tst-memstream2.c: Include stdlib.h.
* libio/tst-memstream3.c: Include stdlib.h.
* malloc/tst-interpose-aux.c: Include stdint.h.
* misc/tst-preadvwritev-common.c: Include sys/stat.h.
* nptl/tst-basic7.c: Include limits.h.
* nptl/tst-cancel25.c: Include pthread.h, not pthreadP.h.
* nptl/tst-cancel4.c: Include stddef.h, limits.h, and sys/stat.h.
* nptl/tst-cancel4_1.c: Include stddef.h.
* nptl/tst-cancel4_2.c: Include stddef.h.
* nptl/tst-cond16.c: Include limits.h.
Use sysconf(_SC_PAGESIZE) instead of __getpagesize.
* nptl/tst-cond18.c: Include limits.h.
Use sysconf(_SC_PAGESIZE) instead of __getpagesize.
* nptl/tst-cond4.c: Include stdint.h.
* nptl/tst-cond6.c: Include stdint.h.
* nptl/tst-stack2.c: Include limits.h.
* nptl/tst-stackguard1.c: Include stddef.h.
* nptl/tst-tls4.c: Include stdint.h. Don't include tls.h.
* nptl/tst-tls4moda.c: Include stddef.h.
Don't include stdio.h, unistd.h, or tls.h.
* nptl/tst-tls4modb.c: Include stddef.h.
Don't include stdio.h, unistd.h, or tls.h.
* nptl/tst-tls5.h: Include stddef.h. Don't include stdlib.h or tls.h.
* posix/tst-getaddrinfo2.c: Include stdio.h.
* posix/tst-getaddrinfo5.c: Include stdio.h.
* posix/tst-pathconf.c: Include sys/stat.h.
* posix/tst-posix_fadvise-common.c: Include stdint.h.
* posix/tst-preadwrite-common.c: Include sys/stat.h.
* posix/tst-regex.c: Include stdint.h.
Don't include spawn.h or spawn_int.h.
* posix/tst-regexloc.c: Don't include spawn.h or spawn_int.h.
* posix/tst-vfork3.c: Include sys/stat.h.
* resolv/tst-bug18665-tcp.c: Include stdlib.h.
* resolv/tst-res_hconf_reorder.c: Include stdlib.h.
* resolv/tst-resolv-search.c: Include stdlib.h.
* stdio-common/tst-fmemopen2.c: Include stdint.h.
* stdio-common/tst-vfprintf-width-prec.c: Include stdlib.h.
* stdlib/test-canon.c: Include sys/stat.h.
* stdlib/tst-tls-atexit.c: Include stdbool.h.
* string/test-memchr.c: Include stdint.h.
* string/tst-cmp.c: Include stdint.h.
* sysdeps/pthread/tst-timer.c: Include stdint.h.
* sysdeps/unix/sysv/linux/tst-sync_file_range.c: Include stdint.h.
* sysdeps/wordsize-64/tst-writev.c: Include limits.h and stdint.h.
* sysdeps/x86_64/fpu/math-tests-arch.h: Include cpu-features.h.
Don't include init-arch.h.
* sysdeps/x86_64/multiarch/test-multiarch.h: Include cpu-features.h.
Don't include init-arch.h.
* sysdeps/x86_64/tst-auditmod10b.c: Include link.h and stddef.h.
* sysdeps/x86_64/tst-auditmod3b.c: Include link.h and stddef.h.
* sysdeps/x86_64/tst-auditmod4b.c: Include link.h and stddef.h.
* sysdeps/x86_64/tst-auditmod5b.c: Include link.h and stddef.h.
* sysdeps/x86_64/tst-auditmod6b.c: Include link.h and stddef.h.
* sysdeps/x86_64/tst-auditmod6c.c: Include link.h and stddef.h.
* sysdeps/x86_64/tst-auditmod7b.c: Include link.h and stddef.h.
* time/clocktest.c: Include stdint.h.
* time/tst-posixtz.c: Include stdint.h.
* timezone/tst-timezone.c: Include stdint.h.
The Bessel functions of the second type (Yn) should raise the "divide
by zero" exception when input is zero (both positive and negative).
Current code gives the right output, but fails to set the exception.
This error is exposed for float, double, and long double when linking
with -lieee. Without this flag, the error is not exposed, because the
wrappers for these functions, which use __kernel_standard
functionality, set the exception as expected.
Tested for powerpc64le.
[BZ #21134]
* sysdeps/ieee754/dbl-64/e_j0.c (__ieee754_y0): Raise the
"divide by zero" exception when the input is zero.
* sysdeps/ieee754/dbl-64/e_j1.c (__ieee754_y1): Likewise.
* sysdeps/ieee754/flt-32/e_j0f.c (__ieee754_y0f): Likewise.
* sysdeps/ieee754/flt-32/e_j1f.c (__ieee754_y1f): Likewise.
* sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_y0l): Likewise.
* sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_y1l): Likewise.
The libmvec tests put substantive, architecture-specific contents in
.c files such as test-double-vlen4.c, so making those files
architecture-specific and causing issues for generating such files
automatically when splitting up tests by function.
This patch moves all the substantive contents to .h files, so the .c
files only include the .h file and then libm-test.c. This allows for
automatic generation of per-function .c files in future. The .h files
in turn #include or #include_next the architecture-independent file
and add the architecture-specific definitions to that. (Splitting by
function should in fact allow the TEST_VECTOR_* macros to be replaced
by sysdeps makefile information on which functions to test in each
case, removing the need for gen-libm-have-vector-test.sh as well as
removing the need for some of the architecture-specific headers.)
Tested for x86_64.
* sysdeps/x86_64/fpu/test-double-vlen2.c: Move most contents to,
and include ...
* sysdeps/x86_64/fpu/test-double-vlen2.h: ... here. New file.
* sysdeps/x86_64/fpu/test-double-vlen4-avx2.c: Move most contents
to, and include ...
* sysdeps/x86_64/fpu/test-double-vlen4-avx2.h: ... here. New
file.
* sysdeps/x86_64/fpu/test-double-vlen4.c: Move most contents to,
and include ...
* sysdeps/x86_64/fpu/test-double-vlen4.h: ... here. New file.
* sysdeps/x86_64/fpu/test-double-vlen8.c: Move most contents to,
and include ...
* sysdeps/x86_64/fpu/test-double-vlen8.h: ... here. New file.
* sysdeps/x86_64/fpu/test-float-vlen16.c: Move most contents to,
and include ...
* sysdeps/x86_64/fpu/test-float-vlen16.h: ... here. New file.
* sysdeps/x86_64/fpu/test-float-vlen4.c: Move most contents to,
and include ...
* sysdeps/x86_64/fpu/test-float-vlen4.h: ... here. New file.
* sysdeps/x86_64/fpu/test-float-vlen8-avx2.c: Move most contents
to, and include ...
* sysdeps/x86_64/fpu/test-float-vlen8-avx2.h: ... here. New file.
* sysdeps/x86_64/fpu/test-float-vlen8.c: Move most contents to,
and include ...
* sysdeps/x86_64/fpu/test-float-vlen8.h: ... here. New file.
The Bessel functions of the second type (Yn) are not defined for
negative input and should return NAN with the "invalid" exception
raised, in these cases. However, current code checks for infinity and
return zero, regardless of the sign. This error is exposed for long
double when linking with -lieee. Without this flag, the error is not
exposed, because the wrappers for these functions, which use
__kernel_standard functionality, return the correct value.
Tested for powerpc64le.
[BZ #21130]
* sysdeps/ieee754/ldbl-128/e_j0l.c (__ieee754_y0l): Return NAN
with the "invalid" exception raised when x is -Inf.
* sysdeps/ieee754/ldbl-128/e_j1l.c (__ieee754_y1l): Likewise.
This patch adds the suffix "_compat" to lgamma_r wrappers and make
some adjustments to #includes and Makefiles. This is a step towards
deprecation of wrappers that use _LIB_VERSION / matherr /
__kernel_standard functionality.
Tested for powerpc64le, s390, and x86_64.
* math/Makefile (libm-calls): Move w_lgammaF_r...
(libm-compat-calls-auto): Here.
* math/w_lgamma_r.c: Add suffix "_compat" to filename.
* math/w_lgammaf_r.c: Likewise.
* math/w_lgammal_r.c: Likewise.
* sysdeps/ia64/fpu/w_lgammal_r.c: Likewise.
* sysdeps/ia64/fpu/w_lgammaf_r.c: Likewise.
* sysdeps/ia64/fpu/w_lgamma_r.c: Likewise.
* math/w_lgamma_r_compat.c: New file, copied from above.
* math/w_lgammaf_r_compat.c: Likewise.
* math/w_lgammal_r_compat.c: Likewise.
* sysdeps/ia64/fpu/w_lgamma_r_compat.c: Likewise.
* sysdeps/ia64/fpu/w_lgammaf_r_compat.c: Likewise.
* sysdeps/ia64/fpu/w_lgammal_r_compat.c: Likewise.
* sysdeps/ieee754/ldbl-opt/w_lgamma_r.c: Add suffix "_compat"
to filename.
* sysdeps/ieee754/ldbl-opt/w_lgammal_r.c: Likewise.
* sysdeps/ieee754/ldbl-opt/w_lgamma_r_compat.c: New file
copied from above and adjusted for the new filenames.
* sysdeps/ieee754/ldbl-opt/w_lgammal_r_compat.c: Likewise.
Add PTRACE_EVENT_STOP value to Linux's sys/ptrace.h, modify related
comments accordingly.
This constant initially appeared in Linux 3.1 (kernel commit 3544d72a,
"ptrace: implement PTRACE_SEIZE") but its value has changed later
in Linux 3.4 (kernel commit 5cdf389a, "ptrace: renumber
PTRACE_EVENT_STOP so that future new options and events can match").
The comment is also taken from the above commit.
This constant is used by e.g. strace, CRIU, Mozilla RR.
* sysdeps/unix/sysv/linux/aarch64/sys/ptrace.h (__ptrace_eventcodes):
Add PTRACE_EVENT_STOP.
* sysdeps/unix/sysv/linux/ia64/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/s390/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/tile/sys/ptrace.h: Likewise.
Bug 21112 reports a case where powf is substantially inaccurate. This
results from a multiplication where cp_h*p_h is required to be exact,
and p_h is masked to have only 12 leading nonzero bits in its
mantissa, but the value of cp_h has the 13th bit nonzero, leading to
inexact multiplication results in some cases that can result in large
errors in the final result of powf. This patch fixes this by using a
value of cp_h correctly rounded to nearest to 12 bits, with a
corresponding updated value of cp_l.
Tested for x86_64 and x86.
[BZ #21112]
* sysdeps/ieee754/flt-32/e_powf.c (cp_h): Use value with trailing
12 bits zero.
(cp_l): Update for new value of cp_h.
* math/auto-libm-test-in: Add another test of pow.
* math/auto-libm-test-out-pow: Regenerated.
For strings >16B and <32B existing algorithm takes more time than default
implementation when strings are placed closed to end of page. This is due
to byte by byte access for handling page cross. This is improved by
following >32B code path where the address is adjusted to aligned memory
before doing load doubleword operation instead of loading bytes.
Tested on powerpc64 and powerpc64le.
This patch removes the COLORING_INCREMENT define and usage on allocatestack.c.
It has not been used since 564cd8b67e (glibc-2.3.3) by any architecture.
The idea is to simplify the code by removing obsolete code.
* nptl/allocatestack.c [COLORING_INCREMENT] (nptl_ncreated): Remove.
(allocate_stack): Remove COLORING_INCREMENT usage.
* nptl/stack-aliasing.h (COLORING_INCREMENT). Likewise.
* sysdeps/i386/i686/stack-aliasing.h (COLORING_INCREMENT): Likewise.
It is no longer needed to preserve the flags parameter to `clone' since
the commit c579f48edb (Remove cached
PID/TID in clone).
Testing was performed successfully on sparcv9/Linux.
[BZ #21075]
* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__clone): Remove
unused assignment.
* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__clone): Likewise.
The macros lll_trylock, lll_cond_trylock are extended by an __glibc_unlikely
hint. Now the trylock macros are based on the same assumption about a
free/busy lock as lll_lock.
With the hint gcc emits code in e.g. pthread_mutex_trylock which does
not use jumps if the lock is free. Without the hint it had to jump away
if the lock is free.
Tested on s390x, ppc.
ChangeLog:
* sysdeps/nptl/lowlevellock.h (lll_trylock, lll_cond_trylock):
Add __glibc_unlikely hint.
Based on comments on previous attempt to address BZ#16640 [1],
the idea is not support invalid use of strtok (the original
bug report proposal). This leader to a new strtok optimized
strtok implementation [2].
The idea of this patch is to fix BZ#16640 to align all the
implementations to a same contract. However, with newer strtok
code it is better to get remove the old assembly ones instead of
fix them.
For x86 is a gain in all cases since the new implementation can
potentially use sse2/sse42 implementation for strspn and strcspn.
This shows a better performance on both i686 and x86_64 using
the string benchtests.
On powerpc64 the gains are mixed, where only for larger inputs
or keys some gains are showns (based on benchtest it seems that
it shows some gains for keys larger than 10 and inputs larger
than 32). I would prefer to remove the optimized implementation
based on first code simplicity and second because some more gain
could be optimized using a better optimized strcspn/strspn
code (as for x86). However if powerpc arch maintainers prefer I
can send a v2 with the assembly code adjusted instead.
Checked on x86_64-linux-gnu, i686-linux-gnu, and powerpc64le-linux-gnu.
[BZ #16640]
* sysdeps/i386/i686/strtok.S: Remove file.
* sysdeps/i386/i686/strtok_r.S: Likewise.
* sysdeps/i386/strtok.S: Likewise.
* sysdeps/i386/strtok_r.S: Likewise.
* sysdeps/powerpc/powerpc64/strtok.S: Likewise.
* sysdeps/powerpc/powerpc64/strtok_r.S: Likewise.
* sysdeps/x86_64/strtok.S: Likewise.
* sysdeps/x86_64/strtok_r.S: Likewise.
[1] https://sourceware.org/ml/libc-alpha/2016-10/msg00411.html
[2] https://sourceware.org/ml/libc-alpha/2016-12/msg00461.html
As noted by c1f0601389, previous posix_fadvise consolidation
broke on mips o32. As stated in commit message, MIPS o32 only defines
__NR_fadvise64 and it is behaves like __NR_fadvise64_64.
This patches consolidates both ARM and mips o32 version by fixing
the ARM used option (__NR_fadvise64_64 withouth the alignment required
by abi) and added another option, __ASSUME_FADVISE64_AS_64_64,
which is used on mips o32.
When this option is used, posix_fadvise will use __NR_fadvise64_64
behavior (by defining or not __ASSUME_FADVISE64_64_6ARG). For
mips, if __NR_fadvise64_64 is not defined, __NR_fadvise will be used.
I also updated the posix_fadvise comments to explain better the
different kernel abi used in the supported architectures.
I checked with a mips o32 and verified that posix_fadvise.o is
indeed using 7 argument syscall with the expected argument position.
I also checked on i686-linux-gnu and arm-gnu-eabihf.
* sysdeps/unix/sysv/linux/arm/posix_fadvise.c: Remove file.
* sysdeps/unix/sysv/linux/mips/mips32/posix_fadvise.c: Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_FADVISE64_AS_64_64): Define.
* sysdeps/unix/sysv/linux/posix_fadvise.c [__NR_fadvise64]: Add
!defined __ASSUME_FADVISE64_AS_64_64 to use syscall issue.
[!__NR_fadvise64 && __ASSUME_FADVISE64_64_6ARG]: Remove
__ALIGNMENT_ARG usage.
[!__NR_fadvise64 && !__ASSUME_FADVISE64_64_6ARG]: Define
__NR_fadvise64_64 if it is not defined.
IFUNC relocation against definition in unrelocated shared library
will lead to segfault when the IFUNC function is called. This
patch allows such IFUNC relocations with a warning. This isn't
a real fix for
https://sourceware.org/bugzilla/show_bug.cgi?id=21041
It simply allows the program to load. The program will segfault
when longjmp is called.
* sysdeps/i386/dl-machine.h (elf_machine_rel): Replace
_dl_fatal_printf with _dl_error_printf for IFUNC relocation
against unrelocated shared library.
* sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise.
A setxid program that uses a glibc with tunables disabled may pass on
GLIBC_TUNABLES as is to its child processes. If the child process
ends up using a different glibc that has tunables enabled, it will end
up getting access to unsafe tunables. To fix this, remove
GLIBC_TUNABLES from the environment for setxid process.
* sysdeps/generic/unsecvars.h: Add GLIBC_TUNABLES.
* elf/tst-env-setuid-tunables.c
(test_child_tunables)[!HAVE_TUNABLES]: Verify that
GLIBC_TUNABLES is removed in a setgid process.
Since memset-vec-unaligned-erms.S has VDUP_TO_VEC0_AND_SET_RETURN at
function entry, memset optimized for AVX2 and AVX512 will always use
ymm/zmm register. VZEROUPPER should be placed before ret in
L(stosb):
movq %rdx, %rcx
movzbl %sil, %eax
movq %rdi, %rdx
rep stosb
movq %rdx, %rax
ret
since it can be reached from
L(stosb_more_2x_vec):
cmpq $REP_STOSB_THRESHOLD, %rdx
ja L(stosb)
[BZ #21081]
* sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S
(L(stosb)): Add VZEROUPPER before ret.
The commit documents the ownership rules around 'struct pthread' and
when a thread can read or write to the descriptor. With those ownership
rules in place it becomes obvious that pd->stopped_start should not be
touched in several of the paths during thread startup, particularly so
for detached threads. In the case of detached threads, between the time
the thread is created by the OS kernel and the creating thread checks
pd->stopped_start, the detached thread might have already exited and the
memory for pd unmapped. As a regression test we add a simple test which
exercises this exact case by quickly creating detached threads with
large enough stacks to ensure the thread stack cache is bypassed and the
stacks are unmapped. Before the fix the testcase segfaults, after the
fix it works correctly and completes without issue.
For a detailed discussion see:
https://www.sourceware.org/ml/libc-alpha/2017-01/msg00505.html
The problem is basically that sys/ucontext.h is defining R0..R15
which happens to conflict with some packages like Firefox when
trying to build on SH.
The very same problem existed on arm back then [1] and it was fixed by
renaming R0..R15 to REG_R0..REG_R15. This patch imploy a similar
strategy for SH.
Checked on sh4-linux-gnu with run-built-tests=no and I also got reports
that it fixes Firefox build on Debian sh4.
* sysdeps/unix/sysv/linux/sh/sh3/ucontext_i.sym: Use new REG_R*
constants instead of the old R* ones.
* sysdeps/unix/sysv/linux/sh/sh4/ucontext_i.sym: Likewise.
* sysdeps/unix/sysv/linux/sh/sys/ucontext.h (NGPREG): Rename...
(NGREG): ... to this, to fit in with other architectures.
(gpregset_t): Use new NGREG macro.
[__USE_GNU]: Remove condition; all architectures other than tile
are unconditional.
(R*): Rename to REG_R*.
I noticed that some libm-test-ulps files still had long-obsolete
entries for *_tonearest functions, which will no longer be used since
functions with FE_TONEAREST explicitly set aren't tested separately
from those functions with it as the default rounding mode any more.
This patch removes those obsolete entries. However, as they are a
sign of libm-test-ulps not having been regenerated from scratch for a
long time, I strongly advise people testing on those platforms to
remove / truncate the libm-test-ulps file, run "make regen-ulps" and
commit the regenerated-from-scratch file. (Ideally any failures of
libm tests still present after regeneration would be investigated /
fixed - there are several open "math" bugs spread across these
platforms - but simply regenerating from scratch improves things.)
* sysdeps/hppa/fpu/libm-test-ulps: Remove *_tonearest entries.
* sysdeps/ia64/fpu/libm-test-ulps: Likewise.
* sysdeps/m68k/m680x0/fpu/libm-test-ulps: Likewise.
* sysdeps/microblaze/libm-test-ulps: Likewise.
* sysdeps/sh/libm-test-ulps: Likewise.
This patch adjusts s390 specific lock elision code after review
of the following patches:
-S390: Use own tbegin macro instead of __builtin_tbegin.
(8bfc4a2ab4)
-S390: Use new __libc_tbegin_retry macro in elision-lock.c.
(53c5c3d5ac)
-S390: Optimize lock-elision by decrementing adapt_count at unlock.
(dd037fb3df)
The futex value is not tested before starting a transaction,
__glibc_likely is used instead of __builtin_expect and comments
are adjusted.
ChangeLog:
* sysdeps/unix/sysv/linux/s390/htm.h: Adjust comments.
* sysdeps/unix/sysv/linux/s390/elision-unlock.c: Likewise.
* sysdeps/unix/sysv/linux/s390/elision-lock.c: Adjust comments.
(__lll_lock_elision): Do not test futex before starting a
transaction. Use __glibc_likely instead of __builtin_expect.
* sysdeps/unix/sysv/linux/s390/elision-trylock.c: Adjust comments.
(__lll_trylock_elision): Do not test futex before starting a
transaction. Use __glibc_likely instead of __builtin_expect.
MicroBlaze had clock_* functions exported from librt in glibc 2.18 and
2.19, as confirmed in
<https://sourceware.org/ml/libc-alpha/2017-01/msg00369.html>, and they
then disappeared in 2.20, presumably as a result of the fix
<https://sourceware.org/ml/libc-alpha/2014-02/msg00598.html> for a
Versions.def bug that had resulted in their unintended inclusion in
2.18 (followed by removal of the Versions.def mechanism that allowed
such bugs).
As they were released in that library, they should be considered part
of the GLIBC_2.18 ABI and so restored for the sake of any binaries
that expect them in that library. This patch restores them by adding
a MicroBlaze version of clock-compat.c that overrides SHLIB_COMPAT.
Tested (compilation only) with build-many-glibcs.py (where this fixes
the librt ABI test failure; elf/check-execstack still fails and still
needs architecture maintainer attention to fix it or XFAIL it with an
appropriate explanatory comment).
[BZ #21061]
* sysdeps/unix/sysv/linux/microblaze/clock-compat.c: New file.
Bug 21047 reports that the clang assembler disallows the ARM
implementations of _FPU_GETCW and _FPU_SETCW.
These are deliberately written the way they are, using generic
coprocessor instructions (from the days when VFP was just one possible
coprocessor for ARM) that have the right encodings, to handle the case
of the instructions being used runtime-conditionally inside glibc,
where use of these macros is not meant to result in either the
assembler requiring VFP to be enabled at assembly time or in it
marking the object as using VFP. However, more recent ARM ARM
versions have restricted the definitions of the coprocessor
instructions and reportedly the clang assembler follows that in
disallowing those names for VFP instructions.
In the non-__SOFTFP__ case - which in fact is the only case where
these macro definitions can be used outside the build of glibc itself
- using VFP instruction names is of course fine, since we know that
VFP is enabled for that compilation. Thus, this patch uses the
current VFP names for these instructions in that case to improve
compatibility for this header file.
Tested for hard-float and soft-float builds of glibc, including that
installed stripped shared libraries are unchanged by the patch.
[BZ #21047]
* sysdeps/arm/fpu_control.h [!__SOFTFP__] (_FPU_GETCW): Use VFP
name for instruction.
[!__SOFTFP__] (_FPU_SETCW): Likewise.
The soft-float powerpc version of swapcontext does not restore the
signal mask, resulting in stdlib/tst-setcontext2 failing:
after getcontext
after setcontext
after swapcontext
FAIL: SIGUSR2 is blocked after swapcontext.
This patch fixes this by adjusting the arguments passed to
__sigprocmask so that it restores the saved signal mask as well as
saving the existing one. (For hard-float, this code is only used for
a compat symbol, not for the current version of swapcontext.)
Tested for soft-float powerpc.
[BZ #21045]
* sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext-common.S
(__CONTEXT_FUNC_NAME): Pass address of signal mask to be restored
to __sigprocmask.
As was done in b224637928, check for large size causing an overflow
in the loop that walks over the array.
Branching out of line here is the fastest approach for handling this
problem, since tile can bundle the instructions to compute the branch
test in parallel with doing the required memchr loop setup computation.
Unfortunately, the existing saturated ops (e.g. tilegx addxsc) are
all signed saturing ops, so don't help with unsigned saturation.
In 1e5834c38a ("Refactor Linux ipc_priv header") a different
approach to passing __IPC_64 as zero was created. The tile
architecture also needs to pass __IPC_64 as zero since it does
not set CONFIG_ARCH_WANT_IPC_PARSE_VERSION in the kernel.
So create a minimal ipc_priv.h that specifies __IPC_64 as zero.
Robust mutexes acquired at the time of a call to fork() do not remain
acquired by the forked child process. We have to clear the list of
acquired robust mutexes before registering this list with the kernel;
otherwise, if some of the robust mutexes are process-shared, the parent
process can alter the child's robust mutex list, which can lead to
deadlocks or even modification of memory that may not be occupied by a
mutex anymore.
[BZ #19402]
* sysdeps/nptl/fork.c (__libc_fork): Clear list of acquired robust
mutexes.
lll_robust_unlock on i386 and x86_64 first sets the futex word to
FUTEX_WAITERS|0 before calling __lll_unlock_wake, which will set the
futex word to 0. If the thread is killed between these steps, then the
futex word will be FUTEX_WAITERS|0, and the kernel (at least current
upstream) will not set it to FUTEX_OWNER_DIED|FUTEX_WAITERS because 0 is
not equal to the TID of the crashed thread.
The lll_robust_lock assembly code on i386 and x86_64 is not prepared to
deal with this case because the fastpath tries to only CAS 0 to TID and
not FUTEX_WAITERS|0 to TID; the slowpath simply waits until it can CAS 0
to TID or the futex_word has the FUTEX_OWNER_DIED bit set.
This issue is fixed by removing the custom x86 assembly code and using
the generic C code instead. However, instead of adding more duplicate
code to the custom x86 lowlevellock.h, the code of the lll_robust* functions
is inlined into the single call sites that exist for each of these functions
in the pthread_mutex_* functions. The robust mutex paths in the latter
have been slightly reorganized to make them simpler.
This patch is meant to be easy to backport, so C11-style atomics are not
used.
[BZ #20985]
* nptl/Makefile: Adapt.
* nptl/pthread_mutex_cond_lock.c (LLL_ROBUST_MUTEX_LOCK): Remove.
(LLL_ROBUST_MUTEX_LOCK_MODIFIER): New.
* nptl/pthread_mutex_lock.c (LLL_ROBUST_MUTEX_LOCK): Remove.
(LLL_ROBUST_MUTEX_LOCK_MODIFIER): New.
(__pthread_mutex_lock_full): Inline lll_robust* functions and adapt.
* nptl/pthread_mutex_timedlock.c (pthread_mutex_timedlock): Inline
lll_robust* functions and adapt.
* nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock_full): Likewise.
* sysdeps/nptl/lowlevellock.h (__lll_robust_lock_wait,
__lll_robust_lock, lll_robust_cond_lock, __lll_robust_timedlock_wait,
__lll_robust_timedlock, __lll_robust_unlock): Remove.
* sysdeps/unix/sysv/linux/i386/lowlevellock.h (lll_robust_lock,
lll_robust_cond_lock, lll_robust_timedlock, lll_robust_unlock): Remove.
* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (lll_robust_lock,
lll_robust_cond_lock, lll_robust_timedlock, lll_robust_unlock): Remove.
* sysdeps/unix/sysv/linux/sparc/lowlevellock.h (__lll_robust_lock_wait,
__lll_robust_lock, lll_robust_cond_lock, __lll_robust_timedlock_wait,
__lll_robust_timedlock, __lll_robust_unlock): Remove.
* nptl/lowlevelrobustlock.c: Remove file.
* nptl/lowlevelrobustlock.sym: Likewise.
* sysdeps/unix/sysv/linux/i386/lowlevelrobustlock.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/lowlevelrobustlock.S: Likewise.
After this update, math/test-ildouble, math/test-ldouble and
math/test-ldouble-finite pass on hard float, POWER < 7 builds.
Tested on powerpc, powerpc64 and powerpc64le.
The posix_fadvise consolidation broke posix_fadvise for MIPS o32, so
resulting in posix/tst-posix_fadvise failing.
MIPS o32 (and the other ABIs) has only the posix_fadvise64 syscall,
which acts like posix_fadvise64_64 (in the o32 case, because of the
alignment argument it's actually a 7-argument syscall). The generic
posix_fadvise implementation presumes that if __NR_fadvise64 is
defined, it's for the case where a single len argument is passed to
the syscall rather than two syscall arguments in the case of a 32-bit
system.
The generic posix_fadvise64 works fine for this case (defining
__NR_fadvise64_64 to __NR_fadvise64 as needed). ARM has a
posix_fadvise.c that uses __posix_fadvise64_l64 in posix_fadvise, and
that approach also works for MIPS o32, so this patch makes MIPS o32
include the ARM file.
Tested for MIPS o32.
* sysdeps/unix/sysv/linux/mips/mips32/posix_fadvise.c: New file.
This patch updates the MicroBlaze localplt.data based on the results
of a build with build-many-glibcs.py. This is simply an empirical
update; quite possibly the port could be optimized to remove more
local PLT entry usage.
Tested (compilation tests) with build-many-glibcs.py.
* sysdeps/unix/sysv/linux/microblaze/localplt.data (__pread64):
Add libc.so PLT entry.
(__tls_get_addr): Make ld.so PLT entry optional.
As noted in bug 20126, MIPS n64 uses an incorrect implementation of
readahead intended for 32-bit systems. This patch adds a
syscalls.list entry to fix this. An updated version of the
consolidation patch
<https://sourceware.org/ml/libc-alpha/2016-09/msg00527.html> could
remove this syscalls.list entry again.
Tested with compilation (only) for mips64; the nature of the syscall
doesn't allow for a glibc test to detect this issue.
[BZ #21026]
* sysdeps/unix/sysv/linux/mips/mips64/n64/syscalls.list
(readahead): New syscall entry.
This commit moves one step towards the deprecation of wrappers that
use _LIB_VERSION / matherr / __kernel_standard functionality, by
adding the suffix '_compat' to their filenames and adjusting Makefiles
and #includes accordingly.
New template wrappers that do not use such functionality will be added
by future patches and will be first used by the float128 wrappers.
For MicroBlaze, setjmp/check-installed-headers-cxx fails with:
../setjmp/setjmp.h:34:8: error: '__jmp_buf_tag' has a field '__jmp_buf_tag::__jmpbuf' whose type depends on the type '<unnamed struct>' which has no linkage [-Werror=subobject-linkage]
This patch fixes this in the same way as for some other architectures:
the struct used for the internal __jmp_buf type is given the tag
__jmp_buf_internal_tag.
Tested (compilation tests) with build-many-glibcs.py.
* sysdeps/microblaze/bits/setjmp.h (__jmp_buf): Give struct tag
__jmp_buf_internal_tag.
This corresponds to a patch applied to libgcc. In glibc it doesn't
actually affect much (only fma, I think).
The MIPS sfp-machine.h files have an _FP_CHOOSENAN implementation
which emulates hardware semantics of not preserving signaling NaN
payloads for an operation with two NaN arguments (although that
doesn't suffice to avoid sNaN payload preservation in any case with
just one NaN argument).
However, those are only hardware semantics in the legacy NaN case; in
the NAN2008 case, the architecture documentation says hardware
preserves payloads in such cases. Furthermore, this implementation
assumes legacy NaN semantics, so in the NAN2008 case the
implementation actually has the effect of preserving sNaN payloads but
not preserving qNaN payloads, when both should be preserved.
This patch fixes the code just to copy from the first argument.
Tested for mips64 soft-float.
* sysdeps/mips/mips32/sfp-machine.h (_FP_CHOOSENAN): Always
preserve NaN payload if [__mips_nan2008].
* sysdeps/mips/mips64/sfp-machine.h (_FP_CHOOSENAN): Likewise.
Many linknamespace tests fail for MicroBlaze because __backtrace (as
brought in by libc_fatal.c) uses an inline function get_frame_size
which is not declared static. This patch fixes it to be declared
static.
Tested (compilation tests) with build-many-glibcs.py.
[BZ #21022]
* sysdeps/microblaze/backtrace.c (get_frame_size): Make static.
When testing changes to i386 libm functions (that are shadowed for
i686 builds by i686 versions) recently, I saw that the plain i386
libm-test-ulps (as opposed to the i686 multiarch version) needed
updating for tests that had been added since it was last updated.
This patch updates it accordingly.
* sysdeps/i386/fpu/libm-test-ulps: Update.
Since commit 6e46de42fe default strcat implementation is essentially
the same for specialized ia64 and powerpc ones. This patch removes the
redundant implementation and adjust powerpc64 ifunc code to use the
default one.
Checked on powerpc32-linux-gnu (default and power4) and ia64-linux build
and on powerpc64le-linux-gnu.
* sysdeps/ia64/strcat.c: Remove file.
* sysdeps/powerpc/strcat.c: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strcat-power7.c: Use default
C implementation.
* sysdeps/powerpc/powerpc64/multiarch/strcat-power8.c: Likewise.
* sysdeps/powerpc/powerpc64/multiarch/strcat-ppc64.c: Likewise.
The update of *adapt_count after the release of the lock causes a race
condition when thread A unlocks, thread B continues and destroys the
mutex, and thread A writes to *adapt_count.
Similar to BZ#19387, BZ#21014, and BZ#20971, both x86 sse2 strncat
optimized assembly implementations do not handle the size overflow
correctly.
The x86_64 one is in fact an issue with strcpy-sse2-unaligned, but
that is triggered also with strncat optimized implementation.
This patch uses a similar strategy used on 3daef2c8ee, where
saturared math is used for overflow case.
Checked on x86_64-linux-gnu and i686-linux-gnu. It fixes BZ #19390.
[BZ #19390]
* string/test-strncat.c (test_main): Add tests with SIZE_MAX as
maximum string size.
* sysdeps/i386/i686/multiarch/strcat-sse2.S (STRCAT): Avoid overflow
in pointer addition.
* sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S (STRCPY):
Likewise.
The lseek consolidation broke lseek64 for MIPS n32, so resulting in
io/test-lfs failing with an incorrect return from ftello64. This
configuration uses the lseek syscall with a 64-bit return value; as
the C syscall macros return long, they cannot be used in this case and
so an assembly implementation is needed; accordingly, this patch adds
lseek64 back to syscalls.list for this configuration.
lseek was also broken, truncating the result without checking for
overflow. lseek however was already broken before the consolidation;
it aliased lseek64 so would return an out-of-range value, resulting in
architecturally undefined behavior in the caller if it tried to use a
non-sign-extended value with a 32-bit instruction. This patch adds a
custom lseek implementation in C for n32, which calls __lseek64 to get
the 64-bit value then checks for overflow.
Because the prior lseek breakage did not show in test results, and the
lseek64 breakage showed only indirectly through tests of ftello64,
test coverage was clearly inadequate. This patch extends
io/test-lfs.c to test the lseek64 return value (at a point where it
has already seeked over 2GB into a file), and then to test the lseek
return value (with the latter's expectations depending on whether
off_t is smaller than off64_t).
Tested for mips64 n32. Also tested test-lfs for x86_64 and x86, where
as expected it passes.
[BZ #21019]
* sysdeps/unix/sysv/linux/mips/mips64/n32/syscalls.list (lseek64):
New syscall entry.
* sysdeps/unix/sysv/linux/mips/mips64/n32/lseek.c: New file.
* io/test-lfs.c (do_test): Test offset returned from lseek64 and
lseek.
Testing for MIPS soft float shows that the issue with NaN payload
preservation applies to soft float as well as hard float: the
sfp-machine.h emulates hardware non-preservation semantics, although
only for the case of two NaN arguments.
This patch duly changes the MIPS math-tests.h to expect such
non-preservation for soft float as well as hard float. The issue in
the NAN2008 case for which I posted
<https://gcc.gnu.org/ml/gcc-patches/2017-01/msg00034.html>, of sNaN
payloads being preserved but qNaN payloads not being preserved, is not
currently an issue for glibc tests because we don't have any tests
that check for qNaN payloads being preserved by arithmetic, so a
simple __mips_nan2008 conditional suffices without needing compiler
version checks in the __mips_nan2008 case.
Tested for mips64 soft float.
* sysdeps/mips/math-tests.h (SNAN_TESTS_PRESERVE_PAYLOAD): Do not
condition on [__mips_hard_float].
Similar to BZ#19387 and BZ#20971, both i686 memchr optimized assembly
implementations (memchr-sse2-bsf and memchr-sse2) do not handle the
size overflow correctly.
It is shown by the new tests added by commit 3daef2c8ee, where
both implementation fails with size as SIZE_MAX.
This patch uses a similar strategy used on 3daef2c8ee, where
saturared math is used for overflow case.
Checked on i686-linux-gnu.
[BZ #21014]
* sysdeps/i386/i686/multiarch/memchr-sse2-bsf.S (MEMCHR): Avoid overflow
in pointer addition.
* sysdeps/i386/i686/multiarch/memchr-sse2.S (MEMCHR): Likewise.
The tunables framework allows us to uniformly manage and expose global
variables inside glibc as switches to users. tunables/README has
instructions for glibc developers to add new tunables.
Tunables support can be enabled by passing the --enable-tunables
configure flag to the configure script. This patch only adds a
framework and does not pose any limitations on how tunable values are
read from the user. It also adds environment variables used in malloc
behaviour tweaking to the tunables framework as a PoC of the
compatibility interface.
* manual/install.texi: Add --enable-tunables option.
* INSTALL: Regenerate.
* README.tunables: New file.
* Makeconfig (CPPFLAGS): Define TOP_NAMESPACE.
(before-compile): Generate dl-tunable-list.h early.
* config.h.in: Add HAVE_TUNABLES.
* config.make.in: Add have-tunables.
* configure.ac: Add --enable-tunables option.
* configure: Regenerate.
* csu/init-first.c (__libc_init_first): Move
__libc_init_secure earlier...
* csu/init-first.c (LIBC_START_MAIN):... to here.
Include dl-tunables.h, libc-internal.h.
(LIBC_START_MAIN) [!SHARED]: Initialize tunables for static
binaries.
* elf/Makefile (dl-routines): Add dl-tunables.
* elf/Versions (ld): Add __tunable_set_val to GLIBC_PRIVATE
namespace.
* elf/dl-support (_dl_nondynamic_init): Unset MALLOC_CHECK_
only when !HAVE_TUNABLES.
* elf/rtld.c (process_envvars): Likewise.
* elf/dl-sysdep.c [HAVE_TUNABLES]: Include dl-tunables.h
(_dl_sysdep_start): Call __tunables_init.
* elf/dl-tunable-types.h: New file.
* elf/dl-tunables.c: New file.
* elf/dl-tunables.h: New file.
* elf/dl-tunables.list: New file.
* malloc/tst-malloc-usable-static.c: New test case.
* malloc/Makefile (tests-static): Add it.
* malloc/arena.c [HAVE_TUNABLES]: Include dl-tunables.h.
Define TUNABLE_NAMESPACE.
(DL_TUNABLE_CALLBACK (set_mallopt_check)): New function.
(DL_TUNABLE_CALLBACK_FNDECL): New macro. Use it to define
callback functions.
(ptmalloc_init): Set tunable values.
* scripts/gen-tunables.awk: New file.
* sysdeps/mach/hurd/dl-sysdep.c: Include dl-tunables.h.
(_dl_sysdep_start): Call __tunables_init.
This is a new implementation for condition variables, required
after http://austingroupbugs.net/view.php?id=609 to fix bug 13165. In
essence, we need to be stricter in which waiters a signal or broadcast
is required to wake up; this couldn't be solved using the old algorithm.
ISO C++ made a similar clarification, so this also fixes a bug in
current libstdc++, for example.
We can't use the old algorithm anymore because futexes do not guarantee
to wake in FIFO order. Thus, when we wake, we can't simply let any
waiter grab a signal, but we need to ensure that one of the waiters
happening before the signal is woken up. This is something the previous
algorithm violated (see bug 13165).
There's another issue specific to condvars: ABA issues on the underlying
futexes. Unlike mutexes that have just three states, or semaphores that
have no tokens or a limited number of them, the state of a condvar is
the *order* of the waiters. A waiter on a semaphore can grab a token
whenever one is available; a condvar waiter must only consume a signal
if it is eligible to do so as determined by the relative order of the
waiter and the signal.
Therefore, this new algorithm maintains two groups of waiters: Those
eligible to consume signals (G1), and those that have to wait until
previous waiters have consumed signals (G2). Once G1 is empty, G2
becomes the new G1. 64b counters are used to avoid ABA issues.
This condvar doesn't yet use a requeue optimization (ie, on a broadcast,
waking just one thread and requeueing all others on the futex of the
mutex supplied by the program). I don't think doing the requeue is
necessarily the right approach (but I haven't done real measurements
yet):
* If a program expects to wake many threads at the same time and make
that scalable, a condvar isn't great anyway because of how it requires
waiters to operate mutually exclusive (due to the mutex usage). Thus, a
thundering herd problem is a scalability problem with or without the
optimization. Using something like a semaphore might be more
appropriate in such a case.
* The scalability problem is actually at the mutex side; the condvar
could help (and it tries to with the requeue optimization), but it
should be the mutex who decides how that is done, and whether it is done
at all.
* Forcing all but one waiter into the kernel-side wait queue of the
mutex prevents/avoids the use of lock elision on the mutex. Thus, it
prevents the only cure against the underlying scalability problem
inherent to condvars.
* If condvars use short critical sections (ie, hold the mutex just to
check a binary flag or such), which they should do ideally, then forcing
all those waiter to proceed serially with kernel-based hand-off (ie,
futex ops in the mutex' contended state, via the futex wait queues) will
be less efficient than just letting a scalable mutex implementation take
care of it. Our current mutex impl doesn't employ spinning at all, but
if critical sections are short, spinning can be much better.
* Doing the requeue stuff requires all waiters to always drive the mutex
into the contended state. This leads to each waiter having to call
futex_wake after lock release, even if this wouldn't be necessary.
[BZ #13165]
* nptl/pthread_cond_broadcast.c (__pthread_cond_broadcast): Rewrite to
use new algorithm.
* nptl/pthread_cond_destroy.c (__pthread_cond_destroy): Likewise.
* nptl/pthread_cond_init.c (__pthread_cond_init): Likewise.
* nptl/pthread_cond_signal.c (__pthread_cond_signal): Likewise.
* nptl/pthread_cond_wait.c (__pthread_cond_wait): Likewise.
(__pthread_cond_timedwait): Move here from pthread_cond_timedwait.c.
(__condvar_confirm_wakeup, __condvar_cancel_waiting,
__condvar_cleanup_waiting, __condvar_dec_grefs,
__pthread_cond_wait_common): New.
(__condvar_cleanup): Remove.
* npt/pthread_condattr_getclock.c (pthread_condattr_getclock): Adapt.
* npt/pthread_condattr_setclock.c (pthread_condattr_setclock):
Likewise.
* npt/pthread_condattr_getpshared.c (pthread_condattr_getpshared):
Likewise.
* npt/pthread_condattr_init.c (pthread_condattr_init): Likewise.
* nptl/tst-cond1.c: Add comment.
* nptl/tst-cond20.c (do_test): Adapt.
* nptl/tst-cond22.c (do_test): Likewise.
* sysdeps/aarch64/nptl/bits/pthreadtypes.h (pthread_cond_t): Adapt
structure.
* sysdeps/arm/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/ia64/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/m68k/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/microblaze/nptl/bits/pthreadtypes.h (pthread_cond_t):
Likewise.
* sysdeps/mips/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/nios2/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/s390/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/sh/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/tile/nptl/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/pthreadtypes.h (pthread_cond_t):
Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h (pthread_cond_t):
Likewise.
* sysdeps/x86/bits/pthreadtypes.h (pthread_cond_t): Likewise.
* sysdeps/nptl/internaltypes.h (COND_NWAITERS_SHIFT): Remove.
(COND_CLOCK_BITS): Adapt.
* sysdeps/nptl/pthread.h (PTHREAD_COND_INITIALIZER): Adapt.
* nptl/pthreadP.h (__PTHREAD_COND_CLOCK_MONOTONIC_MASK,
__PTHREAD_COND_SHARED_MASK): New.
* nptl/nptl-printers.py (CLOCK_IDS): Remove.
(ConditionVariablePrinter, ConditionVariableAttributesPrinter): Adapt.
* nptl/nptl_lock_constants.pysym: Adapt.
* nptl/test-cond-printers.py: Adapt.
* sysdeps/unix/sysv/linux/hppa/internaltypes.h (cond_compat_clear,
cond_compat_check_and_clear): Adapt.
* sysdeps/unix/sysv/linux/hppa/pthread_cond_timedwait.c: Remove file ...
* sysdeps/unix/sysv/linux/hppa/pthread_cond_wait.c
(__pthread_cond_timedwait): ... and move here.
* nptl/DESIGN-condvar.txt: Remove file.
* nptl/lowlevelcond.sym: Likewise.
* nptl/pthread_cond_timedwait.c: Likewise.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_timedwait.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i586/pthread_cond_broadcast.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i586/pthread_cond_signal.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i586/pthread_cond_timedwait.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i586/pthread_cond_wait.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i686/pthread_cond_broadcast.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i686/pthread_cond_signal.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i686/pthread_cond_timedwait.S: Likewise.
* sysdeps/unix/sysv/linux/i386/i686/pthread_cond_wait.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: Likewise.
TS 18661-1 defines fromfp functions (fromfp, fromfpx, ufromfp,
ufromfpx, and float and long double variants) to convert from
floating-point to an integer type with any signedness and any given
width up to that of intmax_t, in any of the five IEEE rounding modes
(the usual four for binary floating point, plus rounding to nearest
with ties rounding away from zero), with control of whether in-range
non-integer values should result in the "inexact" exception being
raised. This patch implements these functions for glibc.
These implementations are (apart from raising exceptions) pure integer
implementations; it's entirely possible optimized versions could be
devised for some architectures. A common math/fromfp.h header
provides various common helper code that can readily be shared between
the implementations for different types. For each type, the bulk of
the implementation is also shared between the four functions, with
wrappers that define UNSIGNED and INEXACT macros appropriately before
including the main implementation.
As the functions return intmax_t and uintmax_t without math.h being
allowed to expose those typedef names, they are declared using
__intmax_t and __uintmax_t as obtained from <bits/types.h>.
The FP_INT_* rounding direction macros are defined as ascending
integers in the order the names are listed in the TS; I see no
significant value in allowing architectures to vary the values of
them.
The libm-test machinery is duly adapted to handle unsigned int
arguments, and intmax_t and uintmax_t results. Because each test
input is generally tested for four functions, five rounding modes and
several different widths, the libm-test.inc additions are very large.
Thus, the diffs in the body of this message exclude the libm-test.inc
changes, with the full patch being attached gzipped. The bulk of the
new tests were generated (expanded from a test input plus rounding
results and information about where it lies in the relevant interval
between integers, to libm-test tests for all relevant combinations of
function, rounding direction and width) by a script that's included in
the patch as math/gen-fromfp-tests.py (input data
math/gen-fromfp-tests-inputs); as an ad hoc script that's not really
expected to be rerun, it's not very polished, but it's at least
plausibly useful for adding any further tests for these functions in
future. I may split the libm-test tests up by function in future (so
both libm-test.inc and auto-libm-test-out are split into separate
files, and the tests for each function are also built and run
separately), but not for 2.25.
For no obvious reason, adding tgmath tests for the new functions
resulted in -Wuninitialized errors from test-tgmath.c about the
variable i being used uninitialized. Those errors were correct - the
variable is read by the frexp version in test-tgmath.c (where real
frexp would write through that pointer instead of reading it) - but I
don't know why this patch would result in the pre-existing issue being
newly detected. The patch initializes the variable to avoid those
errors.
With these changes, glibc 2.25 should have all the library features
from TS 18661-1 other than the functions that round result to narrower
type (and constant rounding directions, but I'm considering those
mainly a compiler feature not a library one).
Tested for x86_64, x86, mips64 and powerpc.
* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(fromfp): New declaration.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (fromfpx): Likewise.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfp): Likewise.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfpx): Likewise.
* math/tgmath.h (__TGMATH_TERNARY_FIRST_REAL_RET_ONLY): New macro.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (fromfp): Likewise.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfp): Likewise.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (fromfpx): Likewise.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (ufromfpx): Likewise.
* math/math.h: Include <bits/types.h>.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_INT_UPWARD): New enum
constant and macro.
(FP_INT_DOWNWARD): Likewise.
(FP_INT_TOWARDZERO): Likewise.
(FP_INT_TONEARESTFROMZERO): Likewise.
(FP_INT_TONEAREST): Likewise.
* math/Versions (fromfp): New libm symbol at version GLIBC_2.25.
(fromfpf): Likewise.
(fromfpl): Likewise.
(ufromfp): Likewise.
(ufromfpf): Likewise.
(ufromfpl): Likewise.
(fromfpx): Likewise.
(fromfpxf): Likewise.
(fromfpxl): Likewise.
(ufromfpx): Likewise.
(ufromfpxf): Likewise.
(ufromfpxl): Likewise.
* math/Makefile (libm-calls): Add s_fromfpF, s_ufromfpF,
s_fromfpxF and s_ufromfpxF.
* math/gen-fromfp-tests.py: New file.
* math/gen-fromfp-tests-inputs: Likewise.
* math/libm-test.inc: Include <stdint.h>
(check_intmax_t): New function.
(check_uintmax_t): Likewise.
(struct test_fiu_M_data): New type.
(struct test_fiu_U_data): Likewise.
(RUN_TEST_fiu_M): New macro.
(RUN_TEST_LOOP_fiu_M): Likewise.
(RUN_TEST_fiu_U): Likewise.
(RUN_TEST_LOOP_fiu_U): Likewise.
(fromfp_test_data): New array.
(fromfp_test): New function.
(fromfpx_test_data): New array.
(fromfpx_test): New function.
(ufromfp_test_data): New array.
(ufromfp_test): New function.
(ufromfpx_test_data): New array.
(ufromfpx_test): New function.
(main): Call fromfp_test, fromfpx_test, ufromfp_test and
ufromfpx_test.
* math/gen-libm-test.pl (parse_args): Handle u, M and U descriptor
characters.
* math/test-tgmath-ret.c: Include <stdint.h>.
(rm): New variable.
(width): Likewise.
(CHECK_RET_CONST_TYPE): Take extra arguments and pass them to
called function.
(CHECK_RET_CONST_FLOAT): Take extra arguments and pass them to
CHECK_RET_CONST_TYPE.
(CHECK_RET_CONST_DOUBLE): Likewise.
(CHECK_RET_CONST_LDOUBLE): Likewise.
(CHECK_RET_CONST): Take extra arguments and pass them to calls
macros.
(fromfp): New CHECK_RET_CONST call.
(ufromfp): Likewise.
(fromfpx): Likewise.
(ufromfpx): Likewise.
(do_test): Call check_return_fromfp, check_return_ufromfp,
check_return_fromfpx and check_return_ufromfpx.
* math/test-tgmath.c: Include <stdint.h>
(NCALLS): Increase to 138.
(F(compile_test)): Initialize i. Call fromfp functions.
(F(fromfp)): New function.
(F(fromfpx)): Likewise.
(F(ufromfp)): Likewise.
(F(ufromfpx)): Likewise.
* manual/arith.texi (Rounding Functions): Document FP_INT_UPWARD,
FP_INT_DOWNWARD, FP_INT_TOWARDZERO, FP_INT_TONEARESTFROMZERO,
FP_INT_TONEAREST, fromfp, fromfpf, fromfpl, ufromfp, ufromfpf,
ufromfpl, fromfpx, fromfpxf, fromfpxl, ufromfpx, ufromfpxf and
ufromfpxl.
* manual/libm-err-tab.pl (@all_functions): Add fromfp, fromfpx,
ufromfp and ufromfpx.
* math/fromfp.h: New file.
* sysdeps/ieee754/dbl-64/s_fromfp.c: Likewise.
* sysdeps/ieee754/dbl-64/s_fromfp_main.c: Likewise.
* sysdeps/ieee754/dbl-64/s_fromfpx.c: Likewise.
* sysdeps/ieee754/dbl-64/s_ufromfp.c: Likewise.
* sysdeps/ieee754/dbl-64/s_ufromfpx.c: Likewise.
* sysdeps/ieee754/flt-32/s_fromfpf.c: Likewise.
* sysdeps/ieee754/flt-32/s_fromfpf_main.c: Likewise.
* sysdeps/ieee754/flt-32/s_fromfpxf.c: Likewise.
* sysdeps/ieee754/flt-32/s_ufromfpf.c: Likewise.
* sysdeps/ieee754/flt-32/s_ufromfpxf.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_fromfpl.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_fromfpl_main.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_fromfpxl.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_ufromfpl.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_ufromfpxl.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_fromfpl.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_fromfpl_main.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_fromfpxl.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_ufromfpl.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_ufromfpxl.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_fromfpl.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_fromfpl_main.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_fromfpxl.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_ufromfpl.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_ufromfpxl.c: Likewise.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fromfp,
ufromfp, fromfpx and ufromfpx.
(CFLAGS-nldbl-fromfp.c): New variable.
(CFLAGS-nldbl-fromfpx.c): Likewise.
(CFLAGS-nldbl-ufromfp.c): Likewise.
(CFLAGS-nldbl-ufromfpx.c): Likewise.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.h: Include <stdint.h>.
* sysdeps/ieee754/ldbl-opt/nldbl-fromfp.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-fromfpx.c: Likewise.
* sysdeps/ieee754/ldbl-opt/nldbl-ufromfp.c: Likewise.
* sysdeps/ieee754/ldbl-opt/nldbl-ufromfpx.c: Likewise.
* sysdeps/nacl/libm.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
TS 18661-1 defines *fromfp* functions, which are declared in math.h
and whose return types are intmax_t and uintmax_t, without allowing
math.h to define those typedefs. (This is similar to e.g. ISO C
declaring vprintf in stdio.h without allowing that header to define
va_list.) Thus, math.h needs to access those typedefs under internal
names.
This patch accordingly arranges for bits/types.h (which defines only
internal names, not public *_t typedefs) to define __intmax_t and
__uintmax_t. stdint.h is made to use bits/types.h and define intmax_t
and uintmax_t using __intmax_t and __uintmax_t, to avoid duplication
of information. (It would be reasonable to define more of the types
in stdint.h - and in sys/types.h, where it duplicates such types -
using information already available in bits/types.h.) The idea is
that the subsequent addition of fromfp functions would then make
math.h include bits/types.h and use __intmax_t and __uintmax_t as the
return types of those functions.
Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).
* bits/types.h (__intmax_t): New typedef.
(__uintmax_t): Likewise.
* sysdeps/generic/stdint.h: Include <bits/types.h>.
(intmax_t): Define using __intmax_t.
(uintmax_t): Define using __uintmax_t.
this patch add a direct call to shmget syscall if it is supported by
kernel features.
Checked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmget): Remove.
* sysdeps/unix/sysv/linux/arm/syscalls.list (shmget): Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list (shmget): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmget): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmget): Likewise.
* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmget): Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmget):
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmget):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmget): Likewise.
* sysdeps/unix/sysv/linux/shmget.c (shmget): Use shmget syscall if it
is defined.
this patch add a direct call to shmdt syscall if it is supported by
kernel features.
hecked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmdt): Remove.
* sysdeps/unix/sysv/linux/arm/syscalls.list (shmdt): Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list (shmdt): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmdt): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmdt): Likewise.
* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmdt): Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmdt):
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmdt):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmdt): Likewise.
* sysdeps/unix/sysv/linux/shmdt.c (shmdt): Use shmdt syscall if it is
defined.
This patch consolidates the shmctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/shmctl.c. If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.
The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.
Checked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
oldshmctl.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (shmctl): Remove.
* sysdeps/unix/sysv/linux/arm/syscalls.list (shmctl): Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list (shmctl): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (shmctl): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (shmctl): Likewise.
* sysdeps/unix/sysv/linux/microblaze/syscalls.list (shmctl): Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (shmctl):
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (shmctl):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (shmctl): Likewise.
* sysdeps/unix/sysv/linux/alpha/shmctl.c: Remove file.
* sysdeps/unix/sysv/linux/arm/shmctl.c: Likewise.
* sysdeps/unix/sysv/linux/microblaze/shmctl.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/shmctl.c: Use default
implementation.
* sysdeps/unix/sysv/linux/shmctl.c (__new_shmctl): Use shmctl syscall
if it is defined.
This patch consolidates the semtimedop Linux implementation in only
one default file, sysdeps/unix/sysv/linux/semtimedop.c. If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.
Checked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (semtimedop): Remove.
* sysdeps/unix/sysv/linux/arm/syscalls.list (semtimedop): Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list (semtimedop):
Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (semtimedop): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (semtimedop): Likewise.
* sysdeps/unix/sysv/linux/microblaze/syscalls.list (semtimedop):
Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (semtimedop):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semtimedop): Likewise.
* sysdeps/unix/sysv/linux/m68k/semtimedop.S: Remove file.
* sysdeps/unix/sysv/linux/s390/semtimedop.c: Reorganize headers and
add a comment about s390 syscall difference from default one.
* sysdeps/unix/sysv/linux/semtimedop.c (semtimedop): Use semtimedop
syscall if it is defined.
This patch add a direct call to semop syscall if it is supported by
kernel headers.
Checked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (semop): Remove.
* sysdeps/unix/sysv/linux/arm/syscalls.list (semop): Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list (semop): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (semop): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (semop): Likewise.
* sysdeps/unix/sysv/linux/microblaze/syscalls.list (semop): Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (semop):
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (semop):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semop): Likewise.
* sysdeps/unix/sysv/linux/semop.c (semop): Use semop syscall if it is
defined.
This patch add a direct call to semget syscall if it is supported by
kernel features.
hecked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (semget): Remove.
* sysdeps/unix/sysv/linux/arm/syscalls.list (semget): Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list (semget): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (semget): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (semget): Likewise.
* sysdeps/unix/sysv/linux/microblaze/syscalls.list (semget): Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (semget):
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (semget):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semget): Likewise.
* sysdeps/unix/sysv/linux/semget.c (semget): Use semget syscall
if it is defined.
This patch consolidates the semctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/semctl.c. If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.
The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.
Checked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
oldsemctl.
* sysdeps/unix/sysv/linux/alpha/semctl.c: Remove file.
* sysdeps/unix/sysv/linux/arm/semctl.c: Likewise.
* sysdeps/unix/sysv/linux/microblaze/semctl.c: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/semctl.c: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/semctl.c: Use defaulf
implementation.
* sysdeps/unix/sysv/linux/semctl.c (__new_semctl): Use semctl
syscall if it is defined.
* sysdeps/unix/sysv/linux/generic/syscalls.list (semctl): Remove.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (semctl): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (semctl): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (semctl): Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (semctl):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (semctl): Likewise.
This patch consolidates the msgrcv Linux implementation in only
one default file, sysdeps/unix/sysv/linux/msgrcv.c. If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.
Checked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (msgctl): Remove.
* sysdeps/unix/sysv/linux/arm/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/generic/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/microblaze/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgctl):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgctl): Likewise,
* sysdeps/unix/sysv/linux/mips/mips64/syscalls.list (msgctl):
Likewise.
* sysdeps/unix/sysv/linux/msgrcv.c (__libc_msgrcv): Use msgrcv syscall
if defined.
* sysdeps/unix/sysv/linux/sparc/sparc64/msgrcv.c: Remove file.
This patch consolidates the msgctl Linux implementation in only
one default file, sysdeps/unix/sysv/linux/msgctl.c. If tries to use
the direct syscall if it is supported, otherwise will use the old ipc
multiplex mechanism.
The patch also simplify header inclusion and reorganize internal
compat symbol to be built only if old ipc is defined.
Checked on x86_64, i686, powerpc64le, aarch64, and armhf.
* sysdeps/unix/sysv/linux/alpha/Makefile (sysdeps_routines): Remove
oldmsgctl.
* sysdeps/unix/sysv/linux/alpha/msgctl.c: Remove file.
* sysdeps/unix/sysv/linux/arm/msgctl.c: Likewise.
* sysdeps/unix/sysv/linux/microblaze/msgctl.c: Likewise.
* sysdeps/unix/sysv/linux/alpha/syscalls.list (oldmsgctl): Remove.
* sysdeps/unix/sysv/linux/generic/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/hppa/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/ia64/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (msgctl):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/syscalls.list (msgctl): Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/msgctl.c: Use default
implementation.
* sysdeps/unix/sysv/linux/msgctl.c (__new_msgctl): Use msgctl syscall
if defined.
Some architectures support the old-style IPC and require IPC_64 equal to
0x100 to be passed along SysV IPC syscalls, while new architectures should
default to new IPC version (without the flags being set).
This patch refactor current ipc_priv.h Linux headers in two directions:
- Remove cross platform references (for instance alpha including powerpc
definition) and add required definition for each required port. The
idea is to avoid tie one architecture definition with another and make
platform change independent.
- Move all common definitions (the ipc syscall commands) on a common
header, ipc_ops.h.
* sysdeps/unix/sysv/linux/aarch64/ipc_priv.h: New file.
* sysdeps/unix/sysv/linux/alpha/ipc_priv.h: Avoid included other arch
definition and define its own.
* sysdeps/unix/sysv/linux/ipc_ops.h: New file.
* sysdeps/unix/sysv/linux/x86_64/ipc_priv.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/ipc_priv.h: Likewise.
* sysdeps/unix/sysv/linux/mips/ipc_priv.h: Remove file.
* sysdeps/unix/sysv/linux/mips/mips64/ipc_priv.h: New file.
* sysdeps/unix/sysv/linux/ipc_priv.h: Move ipc syscall operation
definitions to common header.
* sysdeps/unix/sysv/linux/powerpc/ipc_priv.h: Use common syscall
operation from ipc_ops.h.
On current minimum supported kernels, the SysV IPC on Linux is provided
by either the ipc syscalls or correspondent wire syscalls. Also, for
architectures that supports wire syscalls all syscalls are supported
in a set (msgct, msgrcv, msgsnd, msgget, semctl, semget, semop, semtimedop,
shmctl, shmat, shmget, shmdt).
The architectures that only supports ipc syscall are:
- i386, m68k, microblaze, mips32, powerpc (powerpc32, powerpc64, and
powerpc64le), s390 (32 and 64 bits), sh, sparc32, and sparc64.
And the architectures that only supports wired syscalls are:
- aarch64, alpha, hppa, ia64, mips64, mips64n32, nios2, tile
(tilepro, tilegx, and tilegx64), and x86_64
Also arm is the only one that supports both wire syscalls and the
ipc, although the ipc one is deprecated.
This patch adds a new define, __ASSUME_DIRECT_SYSVIPC_SYSCALL, that wired
syscalls are supported on the system and the general idea is to use
it where possible.
I also checked the syscall table for all architectures on Linux 4.9
and there is no change on described support for Linux 2.6.32/3.2.
* sysdeps/unix/sysv/linux/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): New define.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Undef.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/sh/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
* sysdeps/unix/sysv/linux/sparc/kernel-features.h
(__ASSUME_DIRECT_SYSVIPC_SYSCALL): Likewise.
The same error fixed in commit b224637928
happens in the 32-bit implementation of memchr for power7.
This patch adopts the same solution, with a minimal change: it
implements a saturated addition where overflows sets the maximum pointer
size to UINTPTR_MAX.
The 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.
Current optimized memchr for x86_64 does for input arguments pointers
module 64 in range of [49,63] if there is no searchr char in the rest
of 64-byte block a pointer addition which might overflow:
* sysdeps/x86_64/memchr.S
77 .p2align 4
78 L(unaligned_no_match):
79 add %rcx, %rdx
Add (uintptr_t)s % 16 to n in %rdx.
80 sub $16, %rdx
81 jbe L(return_null)
This patch fixes by adding a saturated math that sets a maximum pointer
value if it overflows (UINTPTR_MAX).
Checked on x86_64-linux-gnu and powerpc64-linux-gnu.
[BZ# 19387]
* sysdeps/x86_64/memchr.S (memchr): Avoid overflow in pointer
addition.
* string/test-memchr.c (do_test): Remove alignment limitation.
(test_main): Add test that trigger BZ# 19387.
These are called from the kernel with the stack at a carefully-
chosen location so that the stack frame can be restored: they must not
move the stack pointer lest garbage be restored into the registers.
We explicitly inhibit protection for SPARC and for signal/sigreturn.c:
other arches either define their sigreturn stubs in .S files, or (i386,
x86_64, mips) use macros expanding to top-level asm blocks and explicit
labels in the text section to mock up a "function" without telling the
compiler that one is there at all.
Add a hidden __stack_chk_fail_local alias to libc.so,
and make sure that on targets which use __stack_chk_fail,
this does not introduce a local PLT reference into libc.so.
When dynamically linking, ifunc resolvers are called before TLS is
initialized, so they cannot be safely stack-protected.
We avoid disabling stack-protection on large numbers of files by
using __attribute__ ((__optimize__ ("-fno-stack-protector")))
to turn it off just for the resolvers themselves. (We provide
the attribute even when statically linking, because we will later
use it elsewhere too.)
The address of the stack canary is stored in a per-thread variable,
which means that we must ensure that the TLS area is intialized before
calling any -fstack-protector'ed functions. For dynamically linked
applications, we ensure this (in a later patch) by disabling
-fstack-protector for the whole dynamic linker, but for static
applications, the AT_ENTRY address is called directly by the kernel, so
we must deal with the problem differently.
In static appliations, __libc_setup_tls performs the TCB setup and TLS
initialization, so this commit arranges for it to be called early and
unconditionally. The call (and the stack guard initialization) is
before the DL_SYSDEP_OSCHECK hook, which if set will probably call
functions which are stack-protected (it does on Linux and NaCL too). We
also move apply_irel up, so that we can still safely call functions that
require ifuncs while in __libc_setup_tls (though if stack-protection is
enabled we still have to avoid calling functions that are not
stack-protected at this stage).
Currently strsep calls strpbrk is is now a veneer to strcspn. Calling
strcspn directly is faster. Since it handles a delimiter string of size
1 as a special case, this is not needed in strsep itself. Although this
means there is a slightly higher overhead if the delimiter size is 1,
all other cases are slightly faster. The overall performance gain is 5-10%
on AArch64.
The string/bits/string2.h header contains optimizations for constant
delimiters of size 1-3. Benchmarking these showed similar performance for
size 1 (since in all cases strchr/strchrnul is used), while size 2 and 3
can give up to 2x speedup for small input strings. However if these cases
are common it seems much better to add this optimization to strcspn.
So move these header optimizations to string-inlines.c.
Improve the strsep benchmark so that it actually benchmarks something.
The current version contains a delimiter character at every position in the
input string, so there is very little work to do, and the extremely inefficent
simple_strsep implementation appears fastest in every case. The new version
has either no match in the input for the fail case and a match halfway in the
input for the success case. The input is then restored so that each iteration
does exactly the same amount of work. Reduce the number of testcases since
simple_strsep takes a lot of time now.
* benchtests/bench-strsep.c (oldstrsep): Add old implementation.
(do_one_test) Restore original string so iteration works.
* string/string-inlines.c (do_test): Create better input strings.
(test_main) Reduce number of testruns.
* string/string-inlines.c (__old_strsep_1c): New function.
(__old_strsep_2c): Likewise.
(__old_strsep_3c): Likewise.
* string/strsep.c (__strsep): Remove case of small delim string.
Call strcspn directly rather than strpbrk.
* string/bits/string2.h (__strsep): Remove define.
(__strsep_1c): Remove.
(__strsep_2c): Remove.
(__strsep_3c): Remove.
(strsep): Remove.
* sysdeps/unix/sysv/linux/internal_statvfs.c
(__statvfs_getflags): Rename to __strsep.
Commit 7a5e3d9d63 (elf: Assume TLS is
initialized in _dl_map_object_from_fd) removed the last call of
_dl_tls_setup, but did not remove the function itself.
With stack protection enabled, these files have external symbol
references for the first time, so the fact that they are not compiled
with -fPIE and are then linked into a -pie binary starts to hurt.
TS 18661-1 defines roundeven functions that round a floating-point
number to the nearest integer, in that floating-point type, with ties
rounding to even (whereas the round functions round ties away from
zero). As with other such functions, they raise no exceptions apart
from "invalid" for signaling NaNs. There was a previous user request
for this functionality in glibc in
<https://sourceware.org/ml/libc-help/2015-02/msg00005.html>.
This patch implements these functions for glibc. The implementations
use integer bit-manipulation (or roundeven on the high and low parts,
in the IBM long double case). It's possible that there may be faster
approaches on some architectures (in particular, on AArch64 the frintn
instruction should do exactly what's required); I'll leave it to
architecture maintainers or others interested to implement such
architecture-specific versions if desired. (Where architectures have
instructions to round to nearest integer in the current rounding mode,
implementations saving and restoring the rounding mode - and dealing
with exceptions if those instructions generate "inexact" - are also
possible, though their performance depends on the cost of manipulating
exceptions / rounding mode state.)
Tested for x86_64, x86, mips64 and powerpc.
* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(roundeven): New declaration.
* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (roundeven): New
macro.
* math/Versions (roundeven): New libm symbol at version
GLIBC_2.25.
(roundevenf): Likewise.
(roundevenl): Likewise.
* math/Makefile (libm-calls): Add s_roundevenF.
* math/libm-test.inc (roundeven_test_data): New array.
(roundeven_test): New function.
(main): Call roundeven_test.
* math/test-tgmath.c (NCALLS): Increase to 134.
(F(compile_test)): Call roundeven.
(F(roundeven)): New function.
* manual/arith.texi (Rounding Functions): Document roundeven,
roundevenf and roundevenl.
* manual/libm-err-tab.pl (@all_functions): Add roundeven.
* include/math.h (roundeven): Use libm_hidden_proto.
* sysdeps/ieee754/dbl-64/s_roundeven.c: New file.
* sysdeps/ieee754/dbl-64/wordsize-64/s_roundeven.c: Likewise.
* sysdeps/ieee754/flt-32/s_roundevenf.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_roundevenl.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_roundevenl.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_roundevenl.c: Likewise.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
roundeven.
(CFLAGS-nldbl-roundeven.c): New variable.
* sysdeps/ieee754/ldbl-opt/nldbl-roundeven.c: New file.
* sysdeps/nacl/libm.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
This patch decrements the adapt_count while unlocking the futex
instead of before aquiring the futex as it is done on power, too.
Furthermore a transaction is only started if the futex is currently free.
This check is done after starting the transaction, too.
If the futex is not free and the transaction nesting depth is one,
we can simply end the started transaction instead of aborting it.
The implementation of this check was faulty as it always ended the
started transaction. By using the fallback path, the the outermost
transaction was aborted. Now the outermost transaction is aborted
directly.
This patch also adds some commentary and aligns the code in
elision-trylock.c to the code in elision-lock.c as possible.
ChangeLog:
* sysdeps/unix/sysv/linux/s390/lowlevellock.h
(__lll_unlock_elision, lll_unlock_elision): Add adapt_count argument.
* sysdeps/unix/sysv/linux/s390/elision-lock.c:
(__lll_lock_elision): Decrement adapt_count while unlocking
instead of before locking.
* sysdeps/unix/sysv/linux/s390/elision-trylock.c
(__lll_trylock_elision): Likewise.
* sysdeps/unix/sysv/linux/s390/elision-unlock.c:
(__lll_unlock_elision): Likewise.
This patch implements __libc_tbegin_retry macro which is equivalent to
gcc builtin __builtin_tbegin_retry, except the changes which were applied
to __libc_tbegin in the previous patch.
If tbegin aborts with _HTM_TBEGIN_TRANSIENT. Then this macros restores
the fpc, fprs and automatically retries up to retry_cnt tbegins.
Further saving of the state is omitted as it is already saved in the
first round. Before retrying a further transaction, the
transaction-abort-assist instruction is used to support the cpu.
This macro is now used in function __lll_lock_elision.
ChangeLog:
* sysdeps/unix/sysv/linux/s390/htm.h(__libc_tbegin_retry): New macro.
* sysdeps/unix/sysv/linux/s390/elision-lock.c (__lll_lock_elision):
Use __libc_tbegin_retry macro.
This patch defines __libc_tbegin, __libc_tend, __libc_tabort and
__libc_tx_nesting_depth in htm.h which replaces the direct usage of
equivalent gcc builtins.
We have to use an own inline assembly instead of __builtin_tbegin,
as tbegin has to filter program interruptions which can't be done with
the builtin. Before this change, e.g. a segmentation fault within a
transaction, leads to a coredump where the instruction pointer points
behind the tbegin instruction instead of real failing one.
Now the transaction aborts and the code should be reexecuted by the
fallback path without transactions. The segmentation fault will
produce a coredump with the real failing instruction.
The fpc is not saved before starting the transaction. If e.g. the
rounging mode is changed and the transaction is aborting afterwards,
the builtin will not restore the fpc. This is now done with the
__libc_tbegin macro.
Now the call saved fprs have to be saved / restored in the
__libc_tbegin macro. Using the gcc builtin had forced the saving /
restoring of fprs at begin / end of e.g. __lll_lock_elision function.
The new macro saves these fprs before tbegin instruction and only
restores them on a transaction abort. Restoring is not needed on
a successfully started transaction.
The used inline assembly does not clobber the fprs / vrs!
Clobbering the latter ones would force the compiler to save / restore
the call saved fprs as those overlap with the vrs, but they only
need to be restored if the transaction fails. Thus the user of the
tbegin macros has to compile the file / function with -msoft-float.
It prevents gcc from using fprs / vrs.
ChangeLog:
* sysdeps/unix/sysv/linux/s390/Makefile (elision-CFLAGS):
Add -msoft-float.
* sysdeps/unix/sysv/linux/s390/htm.h: New File.
* sysdeps/unix/sysv/linux/s390/elision-lock.c:
Use __libc_t* transaction macros instead of __builtin_t*.
* sysdeps/unix/sysv/linux/s390/elision-trylock.c: Likewise.
* sysdeps/unix/sysv/linux/s390/elision-unlock.c: Likewise.
This uses atomic operations to access lock elision metadata that is accessed
concurrently (ie, adapt_count fields). The size of the data is less than a
word but accessed only with atomic loads and stores.
See also x86 commit ca6e601a9d:
"Use C11-like atomics instead of plain memory accesses in x86 lock elision."
ChangeLog:
* sysdeps/unix/sysv/linux/s390/elision-lock.c
(__lll_lock_elision): Use atomics to load / store adapt_count.
* sysdeps/unix/sysv/linux/s390/elision-trylock.c
(__lll_trylock_elision): Likewise.
Patch disables Intel TSX on some Haswell processors to avoid TSX
on kernels that weren't updated with the latest microcode package
(which disables broken feature by default).
* sysdeps/x86/cpu-features.c (get_common_indeces): Add
stepping identification.
(init_cpu_features): Add handle of Haswell.
explicit_bzero(s, n) is the same as memset(s, 0, n), except that the
compiler is not allowed to delete a call to explicit_bzero even if the
memory pointed to by 's' is dead after the call. Right now, this effect
is achieved externally by having explicit_bzero be a function whose
semantics are unknown to the compiler, and internally, with a no-op
asm statement that clobbers memory. This does mean that small
explicit_bzero operations cannot be expanded inline as small memset
operations can, but on the other hand, small memset operations do get
deleted by the compiler. Hopefully full compiler support for
explicit_bzero will happen relatively soon.
There are two new tests: test-explicit_bzero.c verifies the
visible semantics in the same way as the existing test-bzero.c,
and tst-xbzero-opt.c verifies the not-being-optimized-out property.
The latter is conceptually based on a test written by Matthew Dempsky
for the OpenBSD regression suite.
The crypt() implementation has an immediate use for this new feature.
We avoid having to add a GLIBC_PRIVATE alias for explicit_bzero
by running all of libcrypt's calls through the fortified variant,
__explicit_bzero_chk, which is in the impl namespace anyway. Currently
I'm not aware of anything in libc proper that needs this, but the
glue is all in place if it does become necessary. The legacy DES
implementation wasn't bothering to clear its buffers, so I added that,
mostly for consistency's sake.
* string/explicit_bzero.c: New routine.
* string/test-explicit_bzero.c, string/tst-xbzero-opt.c: New tests.
* string/Makefile (routines, strop-tests, tests): Add them.
* string/test-memset.c: Add ifdeffage for testing explicit_bzero.
* string/string.h [__USE_MISC]: Declare explicit_bzero.
* debug/explicit_bzero_chk.c: New routine.
* debug/Makefile (routines): Add it.
* debug/tst-chk1.c: Test fortification of explicit_bzero.
* string/bits/string3.h: Fortify explicit_bzero.
* manual/string.texi: Document explicit_bzero.
* NEWS: Mention addition of explicit_bzero.
* crypt/crypt-entry.c (__crypt_r): Clear key-dependent intermediate
data before returning, using explicit_bzero.
* crypt/md5-crypt.c (__md5_crypt_r): Likewise.
* crypt/sha256-crypt.c (__sha256_crypt_r): Likewise.
* crypt/sha512-crypt.c (__sha512_crypt_r): Likewise.
* include/string.h: Redirect internal uses of explicit_bzero
to __explicit_bzero_chk[_internal].
* string/Versions [GLIBC_2.25]: Add explicit_bzero.
* debug/Versions [GLIBC_2.25]: Add __explicit_bzero_chk.
* sysdeps/arm/nacl/libc.abilist
* sysdeps/unix/sysv/linux/aarch64/libc.abilist
* sysdeps/unix/sysv/linux/alpha/libc.abilist
* sysdeps/unix/sysv/linux/arm/libc.abilist
* sysdeps/unix/sysv/linux/hppa/libc.abilist
* sysdeps/unix/sysv/linux/i386/libc.abilist
* sysdeps/unix/sysv/linux/ia64/libc.abilist
* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
* sysdeps/unix/sysv/linux/microblaze/libc.abilist
* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
* sysdeps/unix/sysv/linux/nios2/libc.abilist
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
* sysdeps/unix/sysv/linux/sh/libc.abilist
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist:
Add entries for explicit_bzero and __explicit_bzero_chk.
Current optimized powercp64/power7 memchr uses a strategy to check for
p versus align(p+n) (where 'p' is the input char pointer and n the
maximum size to check for the byte) without taking care for possible
overflow on the pointer addition in case of large 'n'.
It was triggered by 3038145ca2 where default rawmemchr (used to
created ppc64 rawmemchr in ifunc selection) now uses memchr (p, c, (size_t)-1)
on its implementation.
This patch fixes it by implement a satured addition where overflows
sets the maximum pointer size to UINTPTR_MAX.
Checked on powerpc64le-linux-gnu.
[BZ# 20971]
* sysdeps/powerpc/powerpc64/power7/memchr.S (__memchr): Avoid
overflow in pointer addition.
* string/test-memchr.c (do_test): Add an argument to pass as
the size on memchr.
(test_main): Add check for SIZE_MAX.
This patch converts the wrapper scalbln (which set errno directly
rather than doing anything with __kernel_standard) to use the
type-generic template machinery, in the same way that has been done
for ldexp.
Tested for powerpc64le, s390, and x86_64.
Various fmax and fmin function implementations mishandle sNaN
arguments:
(a) When both arguments are NaNs, the return value should be a qNaN,
but sometimes it is an sNaN if at least one argument is an sNaN.
(b) Under TS 18661-1 semantics, if either argument is an sNaN then the
result should be a qNaN (whereas if one argument is a qNaN and the
other is not a NaN, the result should be the non-NaN argument).
Various implementations treat sNaNs like qNaNs here.
This patch fixes the x86 and x86_64 versions (ignoring float and
double for 32-bit x86 given the inability to reliably avoid the sNaN
turning into a qNaN before it gets to the called function). Tests of
sNaN inputs to these functions are added.
Note on architecture versions I haven't changed for this issue:
AArch64 already gets this right (it uses a hardware instruction with
the correct semantics for both quiet and signaling NaNs) and does not
need changes. It's possible Alpha, IA64, SPARC might need changes
(this would be shown by the testsuite if so).
Tested for x86_64 and x86 (both i686 and i586 builds, to cover the
different x86 implementations).
[BZ #20947]
* sysdeps/i386/fpu/s_fmaxl.S (__fmaxl): Add the arguments when
either is a signaling NaN.
* sysdeps/i386/fpu/s_fminl.S (__fminl): Likewise. Make code
follow fmaxl more closely.
* sysdeps/i386/i686/fpu/s_fmaxl.S (__fmaxl): Add the arguments
when either is a signaling NaN.
* sysdeps/i386/i686/fpu/s_fminl.S (__fminl): Likewise.
* sysdeps/x86_64/fpu/s_fmax.S (__fmax): Likewise.
* sysdeps/x86_64/fpu/s_fmaxf.S (__fmaxf): Likewise.
* sysdeps/x86_64/fpu/s_fmaxl.S (__fmaxl): Likewise.
* sysdeps/x86_64/fpu/s_fmin.S (__fmin): Likewise.
* sysdeps/x86_64/fpu/s_fminf.S (__fminf): Likewise.
* sysdeps/x86_64/fpu/s_fminl.S (__fminl): Likewise.
* math/libm-test.inc (fmax_test_data): Add tests of sNaN inputs.
(fmin_test_data): Likewise.
Various fmax and fmin function implementations mishandle sNaN
arguments:
(a) When both arguments are NaNs, the return value should be a qNaN,
but sometimes it is an sNaN if at least one argument is an sNaN.
(b) Under TS 18661-1 semantics, if either argument is an sNaN then the
result should be a qNaN (whereas if one argument is a qNaN and the
other is not a NaN, the result should be the non-NaN argument).
Various implementations treat sNaNs like qNaNs here.
This patch fixes the powerpc versions of these functions (shared by
float and double, 32-bit and 64-bit). The structure of those versions
is that all ordered cases are already handled before anything dealing
with the case where the arguments are unordered; thus, this patch
causes no change to the code executed in the common case (neither
argument a NaN).
Tested for powerpc (32-bit and 64-bit), together with tests to be
added along with the x86_64 / x86 fixes.
[BZ #20947]
* sysdeps/powerpc/fpu/s_fmax.S (__fmax): Add the arguments when
either is a signaling NaN.
* sysdeps/powerpc/fpu/s_fmin.S (__fmin): Likewise.
Information about whether the ABI of long double is the same as that
of double is split between bits/mathdef.h and bits/wordsize.h.
When the ABIs are the same, bits/mathdef.h defines
__NO_LONG_DOUBLE_MATH. In addition, in the case where the same glibc
binary supports both -mlong-double-64 and -mlong-double-128,
bits/wordsize.h defines __LONG_DOUBLE_MATH_OPTIONAL, along with
__NO_LONG_DOUBLE_MATH if this particular compilation is with
-mlong-double-64.
As part of the refactoring I proposed in
<https://sourceware.org/ml/libc-alpha/2016-11/msg00745.html>, this
patch puts all that information in a single header,
bits/long-double.h. It is included from sys/cdefs.h alongside the
include of bits/wordsize.h, so other headers generally do not need to
include bits/long-double.h directly.
Previously, various bits/mathdef.h headers and bits/wordsize.h headers
had this long double information (including implicitly in some
bits/mathdef.h headers through not having the defines present in the
default version). After the patch, it's all in six bits/long-double.h
headers. Furthermore, most of those new headers are not
architecture-specific. Architectures with optional long double all
use the ldbl-opt sysdeps directory, either in the order (ldbl-64-128,
ldbl-opt, ldbl-128) or (ldbl-128ibm, ldbl-opt). Thus a generic header
for the case where long double = double, and headers in ldbl-128,
ldbl-96 and ldbl-opt, suffices to cover every architecture except for
cases where long double properties vary between different ABIs sharing
a set of installed headers; fortunately all the ldbl-opt cases share a
single compiler-predefined macro __LONG_DOUBLE_128__ that can be used
to tell whether this compilation is -mlong-double-64 or
-mlong-double-128.
The two cases where a set of headers is shared between ABIs with
different long double properties, MIPS (o32 has long double = double,
other ABIs use ldbl-128) and SPARC (32-bit has optional long double,
64-bit has required long double), need their own bits/long-double.h
headers.
As with bits/wordsize.h, multiple-include protection for this header
is generally implicit through the include guards on sys/cdefs.h, and
multiple inclusion is harmless in any case. There is one subtlety:
the header must not define __LONG_DOUBLE_MATH_OPTIONAL if
__NO_LONG_DOUBLE_MATH was defined before its inclusion, because doing
so breaks how sysdeps/ieee754/ldbl-opt/nldbl-compat.h defines
__NO_LONG_DOUBLE_MATH itself before including system headers. Subject
to keeping that working, it would be reasonable to move these macros
from defined/undefined #ifdef to always-defined 1/0 #if semantics, but
this patch does not attempt to do so, just rearranges where the macros
are defined.
After this patch, the only use of bits/mathdef.h is the alpha one for
modifying complex function ABIs for old GCC. Thus, all versions of
the header other than the default and alpha versions are removed, as
is the include from math.h.
Tested for x86_64 and x86. Also did compilation-only testing with
build-many-glibcs.py.
* bits/long-double.h: New file.
* sysdeps/ieee754/ldbl-128/bits/long-double.h: Likewise.
* sysdeps/ieee754/ldbl-96/bits/long-double.h: Likewise.
* sysdeps/ieee754/ldbl-opt/bits/long-double.h: Likewise.
* sysdeps/mips/bits/long-double.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/long-double.h: Likewise.
* math/Makefile (headers): Add bits/long-double.h.
* misc/sys/cdefs.h: Include <bits/long-double.h>.
* stdlib/strtold.c: Include <bits/long-double.h> instead of
<bits/wordsize.h>.
* bits/mathdef.h [!_COMPLEX_H]: Do not allow inclusion.
[!__NO_LONG_DOUBLE_MATH]: Remove conditional code.
* math/math.h: Do not include <bits/mathdef.h>.
* sysdeps/aarch64/bits/mathdef.h: Remove file.
* sysdeps/alpha/bits/mathdef.h [!_COMPLEX_H]: Do not allow
inclusion.
* sysdeps/ia64/bits/mathdef.h: Remove file.
* sysdeps/m68k/m680x0/bits/mathdef.h: Likewise.
* sysdeps/mips/bits/mathdef.h: Likewise.
* sysdeps/powerpc/bits/mathdef.h: Likewise.
* sysdeps/s390/bits/mathdef.h: Likewise.
* sysdeps/sparc/bits/mathdef.h: Likewise.
* sysdeps/x86/bits/mathdef.h: Likewise.
* sysdeps/s390/s390-32/bits/wordsize.h
[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]: Remove
conditional code.
* sysdeps/s390/s390-64/bits/wordsize.h
[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
Likewise.
* sysdeps/unix/sysv/linux/alpha/bits/wordsize.h
[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/bits/wordsize.h
[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
Likewise.
* sysdeps/unix/sysv/linux/sparc/bits/wordsize.h
[!__NO_LONG_DOUBLE_MATH && !__LONG_DOUBLE_MATH_OPTIONAL]:
Likewise.
This patch makes bits/fcntl-linux.h include <linux/falloc.h> to define
the FALLOC_* flags under __USE_GNU (linux/falloc.h defines only those
bits, nothing else).
Tested for x86_64 and x86.
* sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU]: Include
<linux/falloc.h>.
(FALLOC_FL_KEEP_SIZE): Remove.
(FALLOC_FL_PUNCH_HOLE): Likewise.
(FALLOC_FL_COLLAPSE_RANGE): Likewise.
(FALLOC_FL_ZERO_RANGE): Likewise.
This patch consolidates the Linux renameat implementation on
sysdeps/unix/sysv/linux/renameat.c. The renameat syscall was
deprecated at b0da6d44 for newer architectures, so using the
auto-generation list may generate wrappers that returns ENOSYS.
Current code try to use __NR_renameat and if it is not define
it uses __NR_renameat2.
Checked on x86_64 and aarch64.
* sysdeps/unix/sysv/linux/renameat.c: New file.
* sysdeps/unix/sysv/linux/syscalls.list: Remove renameat.
This patch consolidates the Linux rename implementation on
sysdeps/unix/sysv/linux/rename.c. Current code try to use
__NR_rename if is defined and apply the same strategy for
__NR_renameat and __NR_renameat2.
Check on x86_64 and aarch64.
* sysdeps/unix/sysv/linux/rename.c: New file.
* sysdeps/unix/sysv/linux/generic/rename.c: Remove file.
This patch converts the wrapper log1p (which set errno directly rather
than doing anything with __kernel_standard) to use the type-generic
template machinery, in the same way that has been done for ilogb.
Tested for powerpc64le, s390, and x86_64.
The new test driver in <support/test-driver.c> has feature parity with
the old one. The main difference is that its hooking mechanism is
based on functions and function pointers instead of macros. This
commit also implements a new environment variable, TEST_COREDUMPS,
which disables the code which disables coredumps (that is, it enables
them if the invocation environment has not disabled them).
<test-skeleton.c> defines wrapper functions so that it is possible to
use existing macros with the new-style hook functionality.
This commit changes only a few test cases to the new test driver, to
make sure that it works as expected.
TS 18661-1 generally defines libm functions taking sNaN arguments to
return qNaN and raise "invalid", even for the cases where a
corresponding qNaN argument would not result in a qNaN return. This
includes hypot with one argument being an infinity and the other being
an sNaN. This patch duly fixes hypot implementatations in glibc
(generic and powerpc) to ensure qNaN, computed by arithmetic on the
arguments, is returned in that case.
Various implementations do their checks for infinities and NaNs inline
by manipulating the representations of the arguments. For simplicity,
this patch just uses issignaling to check for sNaN arguments. This
could be inlined like the existing code (with due care about reversed
quiet NaN conventions, for implementations where that is relevant),
but given that all these checks are in cases where it's already known
at least one argument is not finite, which should be the uncommon
case, that doesn't seem worthwhile unless performance issues are
observed in practice.
Tested for x86_64, x86, mips64 and powerpc.
[BZ #20940]
* sysdeps/ieee754/dbl-64/e_hypot.c (__ieee754_hypot): Do not
return Inf for arguments Inf and sNaN.
* sysdeps/ieee754/flt-32/e_hypotf.c (__ieee754_hypotf): Likewise.
* sysdeps/ieee754/ldbl-128/e_hypotl.c (__ieee754_hypotl):
Likewise.
* sysdeps/ieee754/ldbl-128ibm/e_hypotl.c (__ieee754_hypotl):
Likewise.
* sysdeps/ieee754/ldbl-96/e_hypotl.c (__ieee754_hypotl): Likewise.
* sysdeps/powerpc/fpu/e_hypot.c (TEST_INF_NAN): Do not return Inf
for arguments Inf and sNaN. When returning a NaN, compute it by
arithmetic on the arguments.
* sysdeps/powerpc/fpu/e_hypotf.c (TEST_INF_NAN): Likewise.
* math/libm-test.inc (pow_test_data): Add tests of sNaN arguments.
The x86_64/x86 powl implementations mishandle sNaN arguments, both by
returning sNaN in some cases (instead of doing arithmetic on the
arguments to produce the result when NaN arguments result in NaN
results) and by treating sNaN the same as qNaN for arguments (1, sNaN)
and (sNaN, 0), contrary to TS 18661-1 which requires those cases to
return qNaN instead of 1.
This patch makes the x86_64/x86 powl implementations follow TS 18661-1
semantics for sNaN arguments; sNaN tests are also added for pow.
Given the problems with testing float and double sNaN arguments on
32-bit x86 (sNaN tests disabled because the compiler may convert
unnecessarily to a qNaN when passing arguments), no changes are made
to the powf and pow implementations there.
Tested for x86_64 and x86.
[BZ #20916]
* sysdeps/i386/fpu/e_powl.S (__ieee754_powl): Do not return 1 for
arguments (sNaN, 0) or (1, sNaN). Do arithmetic on NaN arguments
to compute result.
* sysdeps/x86_64/fpu/e_powl.S (__ieee754_powl): Likewise.
* math/libm-test.inc (pow_test_data): Add tests of sNaN arguments.
This uses atomic operations to access lock elision metadata that is accessed
concurrently (ie, adapt_count fields). The size of the data is less than a
word but accessed only with atomic loads and stores; therefore, we add
support for shorter-size atomic load and stores too.
* include/atomic.h (__atomic_check_size_ls): New.
(atomic_load_relaxed, atomic_load_acquire, atomic_store_relaxed,
atomic_store_release): Use it.
* sysdeps/x86/elide.h (ACCESS_ONCE): Remove.
(elision_adapt, ELIDE_LOCK): Use atomics.
* sysdeps/unix/sysv/linux/x86/elision-lock.c (__lll_lock_elision): Use
atomics and improve code comments.
* sysdeps/unix/sysv/linux/x86/elision-trylock.c
(__lll_trylock_elision): Likewise.
Various pow function implementations mishandle sNaN arguments in
various ways. This includes returning sNaN instead of qNaN for sNaN
arguments. For arguments (1, sNaN) and (sNaN, 0), TS 18661-1
semantics are also that the result should be qNaN, whereas with a qNaN
argument there the result should be 1, but for the dbl-64
implementation of pow there are issues with sNaN arguments beyond not
implementing the TS 18661-1 semantics in those special cases.
This patch makes the implementations in sysdeps/ieee754 follow the TS
18661-1 semantics consistently. Because x86 / x86_64 implementations
still need fixing, testcases are not included with this patch; they
will be included with the fix for the x86 / x86_64 versions.
Tested for x86_64, x86, mips64 and powerpc (with such testcases, which
pass in the mips64 and powerpc cases).
[BZ #20916]
* sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Do not return 1
for arguments (sNaN, 0) or (1, sNaN). Do arithmetic on NaN
arguments to compute result.
* sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Do not return
1 for arguments (sNaN, 0) or (1, sNaN).
* sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise.
* sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Likewise.
The dbl-64 implementation of __ieee754_pow returns a NaN for pow
(qNaN, 0) when it should return 1. Normally this is covered up by the
wrappers ending up calling __kernel_standard which fixes up the result
for this case, but for -lieee the wrappers are bypassed and the bad
result gets through as a return value.
Now, the wrappers fixing this are dealing with variant error handling
that wants a result of NaN for pow (qNaN, 0), and only ever call
__kernel_standard for this case if NaN resulted from __ieee754_pow.
This leads to a question of whether the dbl-64 code might be
deliberately returning NaN in order to use those code paths. However,
I can find no sign that this is deliberate. If it were deliberate one
would expect other implementations to do the same, and would expect
the return of NaN to be very old, but it appears it came in by
accident when the present e_pow.c implementation replaced an fdlibm
implementation in 2001. So it appears to be unintended that this path
through the pow wrapper could be used at all.
So this patch fixes the implementation to return 1 in this case as
expected. This is consistent with all the other implementations. The
relevant path through the wrappers is now unreachable, so is removed
(which is the main motivation of this patch: to avoid that path
becoming accidentally reachable when implementing TS 18661-1 semantics
that pow (sNaN, 0) should return qNaN with "invalid" raised). Another
path that would require __ieee754_pow (0, 0) to return 0 is also
unreachable (as all implementations return 1, in accordance with C99
semantics), so is removed as well.
Note: we don't have anything set up to test -lieee, which in any case
is obsolescent (at some point we should remove the ability for new
programs to access _LIB_VERSION or define matherr and have it called
by glibc). So testing will be implicit through sNaN tests added when
making sNaN inputs work correctly for pow functions.
Tested for x86_64 and x86.
[BZ #20919]
* sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Do not return
NaN first argument when raised to power 0.
* math/w_pow.c (__pow): Do not check for NaN or zero results from
raising to power zero.
* math/w_powf.c (__powf): Likewise.
* math/w_powl.c (__powl): Likewise.
* sysdeps/ieee754/k_standard.c (__kernel_standard): Do not handle
pow (0, 0) or pow (NaN, 0).
TS 18661-1 defines llogb functions that are like ilogb except that
they return long int instead of int. Corresponding FP_LLOGB* macros
are defined, whose values are required to have the obvious
correspondence to those of the FP_ILOGB* macros.
This patch implements these functions and macros for glibc. llogb
uses the type-generic infrastructure, with an implementation similar
to the wrapper for ilogb but with additional conversion from FP_ILOGB*
to FP_LLOGB*; this approach avoids needing to modify or duplicate any
of the architecture-specific ilogb implementations. Tests are also
based on those for ilogb.
Ideally the llogb functions would alias the ilogb ones when long is
32-bit, but such aliasing requires the associated header declarations
of the different-type alias to be hidden, typically by defining macros
before including the header (see e.g. how
sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c defines lround to
__hidden_lround before including <math.h>). The infrastructure for
type-generic function implementations does not support defining such
macros at present (since C code can't define a macro whose name is
determined by other macros). So this patch leaves them as separate
functions (similar to e.g. scalbln and scalbn being separate in such a
case as well), but with the remapping of FP_ILOGB* to FP_LLOGB*
conditioned out in the case where it would be the identity map.
Tested for x86_64, x86, mips64 and powerpc.
* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb):
New declaration.
* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb): New
macro.
* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (__FP_LONG_MAX):
New macro.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGB0): Likewise.
[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGBNAN): Likewise.
* math/Versions (llogb): New libm symbol at version GLIBC_2.25.
(llogbf): Likewise.
(llogbl): Likewise.
* math/Makefile (gen-libm-calls): Add w_llogbF.
(tests): Add test-fp-llogb-constants.
* math/w_llogb_template.c: New file. Based on
math/w_ilogb_template.c.
* math/libm-test.inc (llogb_test_data): New array.
(llogb_test): New function.
(main): Call llogb_test.
* math/test-fp-llogb-constants.c: New file. Based on
math/test-fp-ilogb-constants.c.
* math/test-tgmath-ret.c (llogb): New CHECK_RET_CONST call.
(do_test): Call check_return_llogb.
* math/test-tgmath.c (NCALLS): Increase to 126.
(F(compile_test)): Call llogb.
(F(llogb)): New function.
* manual/math.texi (Exponents and Logarithms): Document llogb,
llogbf, llogbl, FP_LLOGB0 and FP_LLOGBNAN.
* manual/libm-err-tab.pl (@all_functions): Add llogb.
* sysdeps/ieee754/ldbl-opt/nldbl-llogb.c: New file.
* sysdeps/ieee754/ldbl-opt/w_llogbl.c: Likewise.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add llogb.
(CFLAGS-nldbl-llogb.c): New variable.
* sysdeps/nacl/libm.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
When I added the getpayload and setpayload functions I failed to make
the ldbl-128 functions use the _Float128 type name like most other
ldbl-128 functions do in preparation for being used to implement *f128
functions. This patch fixes them to use that name.
Tested for mips64.
* sysdeps/ieee754/ldbl-128/s_getpayloadl.c (getpayloadl): Use
_Float128 instead of long double.
* sysdeps/ieee754/ldbl-128/s_setpayloadl_main.c (FUNC): Likewise.
Commit c7debbdfac redirected the internal strrch to default powerpc64
implementation by redefining the weak_alias at
sysdeps/powerpc/powerpc64/multiarch/strchr-ppc64.c:
#undef weak_alias
#define weak_alias(name, aliasname) \
extern __typeof (__strrchr_ppc) aliasname \
__attribute__ ((weak, alias ("__strrchr_ppc")));
This creates a __GI_strchr alias that clashes with the IFUNC symbol in
stprchr.os. There is not need to define the default version for internal
version, since ifunc should work internally for powerpc64. This patch
removes the weak_alias indirection.
Checked on powerpc64le.
* sysdeps/powerpc/powerpc64/multiarch/strrchr-ppc64.c (weak_alias):
Remove redirection to __strrchr_ppc.
Continuing the refactoring of bits/mathdef.h, this patch stops it
defining FP_ILOGB0 and FP_ILOGBNAN, moving the required information to
a new header bits/fp-logb.h.
There are only two possible values of each of those macros permitted
by ISO C. TS 18661-1 adds corresponding macros for llogb, and their
values are required to correspond to those of the ilogb macros in the
obvious way. Thus two boolean values - for which the same choices are
correct for most architectures - suffice to determine the value of all
these macros, and by defining macros for those boolean values in
bits/fp-logb.h we can then define the public FP_* macros in math.h and
avoid the present duplication of the associated feature test macro
logic.
This patch duly moves to bits/fp-logb.h defining __FP_LOGB0_IS_MIN and
__FP_LOGBNAN_IS_MIN. Default definitions of those to 0 are correct
for both architectures, while ia64, m68k and x86 get their own
versions of bits/fp-logb.h to reflect their use of values different
from the defaults.
The patch renders many copies of bits/mathdef.h trivial (needed only
to avoid the default __NO_LONG_DOUBLE_MATH). I'll revise
<https://sourceware.org/ml/libc-alpha/2016-11/msg00865.html>
accordingly so that it removes all bits/mathdef.h headers except the
default one and the alpha one, and arranges for the header to be
included only by complex.h as the only remaining use at that point
will be for the alpha ABI issues there.
Tested for x86_64 and x86. Also did compile-only testing with
build-many-glibcs.py (using glibc sources from before the commit that
introduced many build failures with undefined __GI___sigsetjmp).
* bits/fp-logb.h: New file.
* sysdeps/ia64/bits/fp-logb.h: Likewise.
* sysdeps/m68k/m680x0/bits/fp-logb.h: Likewise.
* sysdeps/x86/bits/fp-logb.h: Likewise.
* math/Makefile (headers): Add bits/fp-logb.h.
* math/math.h: Include <bits/fp-logb.h>.
[__USE_ISOC99] (FP_ILOGB0): Define based on __FP_LOGB0_IS_MIN.
[__USE_ISOC99] (FP_ILOGBNAN): Define based on __FP_LOGBNAN_IS_MIN.
* bits/mathdef.h (FP_ILOGB0): Remove.
(FP_ILOGBNAN): Likewise.
* sysdeps/aarch64/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/alpha/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/ia64/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/m68k/m680x0/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/mips/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/powerpc/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/s390/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/sparc/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
* sysdeps/x86/bits/mathdef.h (FP_ILOGB0): Likewise.
(FP_ILOGBNAN): Likewise.
Commit 142e0a9953 redirected the internal stpcpy to default powerpc64
implementation by redefining the weak_alias at
sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.c:
#undef weak_alias
#define weak_alias(name, aliasname) \
extern __typeof (__stpcpy_ppc) aliasname \
__attribute__ ((weak, alias ("__stpcpy_ppc")));
This creates a __GI_stpcpy alias that clashes with the IFUNC symbol in
stpcpy.os. There is not need to define the default version for internal
version, since ifunc should work internally for powerpc64. This patch
removes the weak_alias indirection.
Checked on powerpc64le.
* sysdeps/powerpc/powerpc64/multiarch/stpcpy-ppc64.c (weak_alias):
Remove redirection to __stpcpy_ppc.
It is no longer needed since commit 6c444ad6e9
(elf: Do not use memalign for TCB/TLS blocks allocation [BZ #17730]).
Applications do not link against ld.so and will use the definition in
libc.so, so there is no ABI impact.
This change moves the main implementation of _dl_catch_error,
_dl_signal_error to libc.so, where TLS variables can be used
directly. This removes a writable function pointer from the
rtld_global variable.
For use during initial relocation, minimal implementations of these
functions are provided in ld.so. These are eventually interposed
by the libc.so implementations. This is implemented by compiling
elf/dl-error-skeleton.c twice, via elf/dl-error.c and
elf/dl-error-minimal.c.
As a side effect of this change, the static version of dl-error.c
no longer includes support for the
_dl_signal_cerror/_dl_receive_error mechanism because it is only
used in ld.so.
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat.c: Do not define
fxstat if XSTAT_IS_XSTAT64 is set to non-zero.
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c: Ditto for
fxstatat.
* sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat.c: Ditto for
lxstat.
* sysdeps/unix/sysv/linux/generic/wordsize-32/xstat.c: Ditto for xstat.
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstat64.c: New file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat64.c: New file.
* sysdeps/unix/sysv/linux/generic/wordsize-32/lxstat64.c: Make __lxstat
an alias of __lxstat64 if XSTAT_IS_XSTAT64 is set to non-zero.
* sysdeps/unix/sysv/linux/generic/wordsize-32/xstat64.c: Ditto for
__xstat.
The __longjmp symbol was left in accidentally. It is not exported
through a Versions file, but through a .symver assembler directive.
The corresponding exported symbol was removed from the non-fpu
powerpc64 targets in commit 9b9ef82358.
Continuing the refactoring of bits/mathdef.h, this patch moves the
FP_FAST_* definitions into a new bits/fp-fast.h header. Currently
this is only for FP_FAST_FMA*, but in future it would be the
appropriate place for the FP_FAST_* macros from TS 18661-1 as well.
The generic bits/mathdef.h header defines these macros based on
whether the compiler defines __FP_FAST_*. Most architecture-specific
headers, however, fail to do so, meaning that if the architecture (or
some particular processors) does in fact have fused operations, and
GCC knows to use them inline, the FP_FAST_* macros will still not be
defined.
By refactoring, this patch causes the generic version (based on
__FP_FAST_*) to be used in more cases, and so the macro definitions to
be more accurate. Architectures that already defined some or all of
these macros other than based on the predefines have their own
versions of fp-fast.h, which are arranged so they define FP_FAST_* if
either the architecture-specific conditions are true or __FP_FAST_*
are defined.
After this refactoring, various bits/mathdef.h headers for
architectures with long double = double are semantically identical to
the generic version. The patch removes those headers that are
redundant. (In fact two of the four removed were already redundant
before this patch because they did use __FP_FAST_*.)
Tested for x86_64 and x86, and compilation-only with
build-many-glibcs.py.
* bits/fp-fast.h: New file.
* sysdeps/aarch64/bits/fp-fast.h: Likewise.
* sysdeps/powerpc/bits/fp-fast.h: Likewise.
* math/Makefile (headers): Add bits/fp-fast.h.
* math/math.h: Include <bits/fp-fast.h>.
* bits/mathdef.h (FP_FAST_FMA): Remove.
(FP_FAST_FMAF): Likewise.
(FP_FAST_FMAL): Likewise.
* sysdeps/aarch64/bits/mathdef.h (FP_FAST_FMA): Likewise.
(FP_FAST_FMAF): Likewise.
* sysdeps/powerpc/bits/mathdef.h (FP_FAST_FMA): Likewise.
(FP_FAST_FMAF): Likewise.
* sysdeps/x86/bits/mathdef.h (FP_FAST_FMA): Likewise.
(FP_FAST_FMAF): Likewise.
(FP_FAST_FMAL): Likewise.
* sysdeps/arm/bits/mathdef.h: Remove file.
* sysdeps/hppa/fpu/bits/mathdef.h: Likewise.
* sysdeps/sh/sh4/bits/mathdef.h: Likewise.
* sysdeps/tile/bits/mathdef.h: Likewise.
This patch converts the ilogb wrappers (which set errno directly
rather than doing anything with __kernel_standard) to use the
type-generic template machinery. This is intended as preparation for
adding llogb.
Tested for x86_64 and x86, and tested compile for other architectures
with build-many-glibcs.py.
* math/w_ilogb_template.c: New file. Based on math/w_ilogb.c.
* math/w_ilogb.c: Remove.
* math/w_ilogbf.c: Likewise.
* math/w_ilogbl.c: Likewise.
* sysdeps/ieee754/ldbl-opt/w_ilogb.c: Likewise.
* sysdeps/ieee754/ldbl-opt/w_ilogbl.c: Likewise.
* math/Makefile (gen-libm-calls): Add w_ilogbF.
(libm-calls): Remove w_ilogbF.
* sysdeps/ieee754/ldbl-opt/math-type-macros-double.h
(LDOUBLE_ilogbl_libm_version): New macro.
Building tests for IA64 runs into a build failure compiling
stdlib/tst-setcontext2.c:
tst-setcontext2.c: In function 'do_test':
tst-setcontext2.c:210:20: error: passing argument 1 of 'sigismember' from incompatible pointer type [-Werror=incompatible-pointer-types]
if (sigismember (&oldctx.uc_sigmask, SIGUSR2) != 1)
^
Indeed, the IA64 uc_sigmask as unsigned long rather than the larger
userspace sigset_t. Fixing this might be hard; this patch works
around the build failure by making IA64 wrap the test with a version
that #defines sigismember to add a cast (I'd welcome a better approach
for fixing this).
Tested (compilation only) for ia64.
* sysdeps/unix/sysv/linux/ia64/tst-setcontext2.c: New file.
IA64 builds in math/ use "-include libm-symbols.h". This breaks the
signgam tests, which rely on undefining _LIBC and feature test macros
and defining _ISOMAC before including system headers to get them to
provide only ISO C declarations (libm-symbols.h ending up indirectly
including headers which result in this breaking); similarly, it breaks
C++ tests as some headers included from libm-symbols.h are not ready
for inclusion in C++ code. This patch disables the contents of
libm-symbols.h if __STRICT_ANSI__ or __cplusplus are defined to avoid
this problem (this header can only test symbols defined before the
source file is processed, so can't test _ISOMAC because that's defined
within the source file, after this header is included).
Tested (compilation only) for ia64.
* sysdeps/ia64/fpu/libm-symbols.h: Make contents conditional on
[!__STRICT_ANSI__ && !__cplusplus].
There is no need to use PLT nor GOT in static archives to branch to a
function, regardless whether static archives is compiled with PIC or
not. When static archives are used to create dynamic executable,
PLT/GOT may be used. The resulting executable still works correctly.
[BZ #20750]
* sysdeps/x86_64/sysdep.h (JUMPTARGET): Check SHARED instead
of PIC.
* sysdeps/unix/sysv/linux/fstatfs64.c: Reorder include files,
only alias fstatfs and __fstatfs if STATFS_IS_STATFS64 is non-zero.
* sysdeps/unix/sysv/linux/statfs64.c: Ditto for statfs and __statfs.
The nios2 sys/cachectl.h includes a kernel header asm/cachectl.h,
which does not exist, so causing the check-installed-headers tests to
fail. This patch removes the include of a nonexistent header.
Tested (compilation only) for nios2.
* sysdeps/unix/sysv/linux/nios2/sys/cachectl.h: Do not include
<asm/cachectl.h>.
TS 18661-1 defines functions for manipulating the payloads of NaNs.
This patch implements the setpayloadsig functions for glibc; these are
like the setpayload functions, but produce a signaling NaN instead of
a quiet NaN.
The substance of the implementation was included with the setpayload
implementation, so the new files here just need to wrap the main files
with different defines to build the new functions.
Because the functions store a signaling NaN via a pointer and the
libm-test macros choose a suitable initial value for the variable in
such a case by comparing with the expected value, the relevant macro
needs to clear exceptions after FE_INVALID may have been raised by
that comparison.
Tested for x86_64, x86, mips64 and powerpc.
* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(setpayloadsig): New declaration.
* math/Versions (setpayloadsig): New libm symbol at version
GLIBC_2.25.
(setpayloadsigf): Likewise.
(setpayloadsigl): Likewise.
* math/Makefile (libm-calls): Add s_setpayloadsigF.
* math/libm-test.inc (RUN_TEST_Ff_b1): Call feclearexcept
(FE_ALL_EXCEPT) after initializing EXTRA_VAR.
(setpayloadsig_test_data): New array.
(setpayloadsig_test): New function.
(main): Call setpayloadsig_test.
* manual/arith.texi (FP Bit Twiddling): Document setpayloadsig,
setpayloadsigf and setpayloadsigl.
* manual/libm-err-tab.pl: Update comment on interfaces without
ulps tabulated.
* sysdeps/ieee754/dbl-64/s_setpayloadsig.c: New file.
* sysdeps/ieee754/flt-32/s_setpayloadsigf.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_setpayloadsigl.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c: Likewise.
* sysdeps/ieee754/ldbl-opt/nldbl-setpayloadsig.c: Likewise.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
setpayloadsig.
(CFLAGS-nldbl-setpayloadsig.c): New variable.
* sysdeps/nacl/libm.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
This patch remove the PID cache and usage in current GLIBC code. Current
usage is mainly used a performance optimization to avoid the syscall,
however it adds some issues:
- The exposed clone syscall will try to set pid/tid to make the new
thread somewhat compatible with current GLIBC assumptions. This cause
a set of issue with new workloads and usecases (such as BZ#17214 and
[1]) as well for new internal usage of clone to optimize other algorithms
(such as clone plus CLONE_VM for posix_spawn, BZ#19957).
- The caching complexity also added some bugs in the past [2] [3] and
requires more effort of each port to handle such requirements (for
both clone and vfork implementation).
- Caching performance gain in mainly on getpid and some specific
code paths. The getpid performance leverage is questionable [4],
either by the idea of getpid being a hotspot as for the getpid
implementation itself (if it is indeed a justifiable hotspot a
vDSO symbol could let to a much more simpler solution).
Other usage is mainly for non usual code paths, such as pthread
cancellation signal and handling.
For thread creation (on stack allocation) the code simplification in fact
adds some performance gain due the no need of transverse the stack cache
and invalidate each element pid.
Other thread usages will require a direct getpid syscall, such as
cancellation/setxid signal, thread cancellation, thread fail path (at
create_thread), and thread signal (pthread_kill and pthread_sigqueue).
However these are hardly usual hotspots and I think adding a syscall is
justifiable.
It also simplifies both the clone and vfork arch-specific implementation.
And by review each fork implementation there are some discrepancies that
this patch also solves:
- microblaze clone/vfork does not set/reset the pid/tid field
- hppa uses the default vfork implementation that fallback to fork.
Since vfork is deprecated I do not think we should bother with it.
The patch also removes the TID caching in clone. My understanding for
such semantic is try provide some pthread usage after a user program
issue clone directly (as done by thread creation with CLONE_PARENT_SETTID
and pthread tid member). However, as stated before in multiple discussions
threads, GLIBC provides clone syscalls without further supporting all this
semantics.
I ran a full make check on x86_64, x32, i686, armhf, aarch64, and powerpc64le.
For sparc32, sparc64, and mips I ran the basic fork and vfork tests from
posix/ folder (on a qemu system). So it would require further testing
on alpha, hppa, ia64, m68k, nios2, s390, sh, and tile (I excluded microblaze
because it is already implementing the patch semantic regarding clone/vfork).
[1] https://codereview.chromium.org/800183004/
[2] https://sourceware.org/ml/libc-alpha/2006-07/msg00123.html
[3] https://sourceware.org/bugzilla/show_bug.cgi?id=15368
[4] http://yarchive.net/comp/linux/getpid_caching.html
* sysdeps/nptl/fork.c (__libc_fork): Remove pid cache setting.
* nptl/allocatestack.c (allocate_stack): Likewise.
(__reclaim_stacks): Likewise.
(setxid_signal_thread): Obtain pid through syscall.
* nptl/nptl-init.c (sigcancel_handler): Likewise.
(sighandle_setxid): Likewise.
* nptl/pthread_cancel.c (pthread_cancel): Likewise.
* sysdeps/unix/sysv/linux/pthread_kill.c (__pthread_kill): Likewise.
* sysdeps/unix/sysv/linux/pthread_sigqueue.c (pthread_sigqueue):
Likewise.
* sysdeps/unix/sysv/linux/createthread.c (create_thread): Likewise.
* sysdeps/unix/sysv/linux/getpid.c: Remove file.
* nptl/descr.h (struct pthread): Change comment about pid value.
* nptl/pthread_getattr_np.c (pthread_getattr_np): Remove thread
pid assert.
* sysdeps/unix/sysv/linux/pthread-pids.h (__pthread_initialize_pids):
Do not set pid value.
* nptl_db/td_ta_thr_iter.c (iterate_thread_list): Remove thread
pid cache check.
* nptl_db/td_thr_validate.c (td_thr_validate): Likewise.
* sysdeps/aarch64/nptl/tcb-offsets.sym: Remove pid offset.
* sysdeps/alpha/nptl/tcb-offsets.sym: Likewise.
* sysdeps/arm/nptl/tcb-offsets.sym: Likewise.
* sysdeps/hppa/nptl/tcb-offsets.sym: Likewise.
* sysdeps/i386/nptl/tcb-offsets.sym: Likewise.
* sysdeps/ia64/nptl/tcb-offsets.sym: Likewise.
* sysdeps/m68k/nptl/tcb-offsets.sym: Likewise.
* sysdeps/microblaze/nptl/tcb-offsets.sym: Likewise.
* sysdeps/mips/nptl/tcb-offsets.sym: Likewise.
* sysdeps/nios2/nptl/tcb-offsets.sym: Likewise.
* sysdeps/powerpc/nptl/tcb-offsets.sym: Likewise.
* sysdeps/s390/nptl/tcb-offsets.sym: Likewise.
* sysdeps/sh/nptl/tcb-offsets.sym: Likewise.
* sysdeps/sparc/nptl/tcb-offsets.sym: Likewise.
* sysdeps/tile/nptl/tcb-offsets.sym: Likewise.
* sysdeps/x86_64/nptl/tcb-offsets.sym: Likewise.
* sysdeps/unix/sysv/linux/aarch64/clone.S: Remove pid and tid caching.
* sysdeps/unix/sysv/linux/alpha/clone.S: Likewise.
* sysdeps/unix/sysv/linux/arm/clone.S: Likewise.
* sysdeps/unix/sysv/linux/hppa/clone.S: Likewise.
* sysdeps/unix/sysv/linux/i386/clone.S: Likewise.
* sysdeps/unix/sysv/linux/ia64/clone2.S: Likewise.
* sysdeps/unix/sysv/linux/mips/clone.S: Likewise.
* sysdeps/unix/sysv/linux/nios2/clone.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/clone.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/clone.S: Likewise.
* sysdeps/unix/sysv/linux/sh/clone.S: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise.
* sysdeps/unix/sysv/linux/tile/clone.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/clone.S: Likewise.
* sysdeps/unix/sysv/linux/aarch64/vfork.S: Remove pid set and reset.
* sysdeps/unix/sysv/linux/alpha/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/arm/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/i386/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/ia64/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/clone.S: Likewise.
* sysdeps/unix/sysv/linux/m68k/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/mips/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/nios2/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/sh/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/tile/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/x86_64/vfork.S: Likewise.
* sysdeps/unix/sysv/linux/tst-clone2.c (f): Remove direct pthread
struct access.
(clone_test): Remove function.
(do_test): Rewrite to take in consideration pid is not cached anymore.
At present, definitions of float_t and double_t are split among many
bits/mathdef.h headers.
For all but three architectures, these types are float and double.
Furthermore, if you assume __FLT_EVAL_METHOD__ to be defined, that
provides a more generic way of determining the correct values of these
typedefs. Defining these typedefs more generally based on
__FLT_EVAL_METHOD__ was previously proposed by Paul Eggert in
<https://sourceware.org/ml/libc-alpha/2012-02/msg00002.html>.
This patch refactors things in the way I proposed in
<https://sourceware.org/ml/libc-alpha/2016-11/msg00745.html>. A new
header bits/flt-eval-method.h defines a single macro,
__GLIBC_FLT_EVAL_METHOD, which is then used by math.h to define
float_t and double_t. The default is based on __FLT_EVAL_METHOD__
(although actually a default to 0 would have the same effect for
current ports, because ports where values other than 0 or 16 are
possible all have their own headers).
To avoid changing the existing semantics in any case, including for
compilers not defining __FLT_EVAL_METHOD__, architecture-specific
files are then added for m68k, s390, x86 which replicate the existing
semantics. At least with __FLT_EVAL_METHOD__ values possible with
GCC, there should be no change to the choices of float_t and double_t
for any supported configuration.
Architecture maintainer notes:
* m68k: sysdeps/m68k/m680x0/bits/flt-eval-method.h always defines
__GLIBC_FLT_EVAL_METHOD to 2 to replicate the existing logic. But
actually GCC defines __FLT_EVAL_METHOD__ to 0 if TARGET_68040. It
might make sense to make the header prefer to base things on
__FLT_EVAL_METHOD__ if defined, like the x86 version, and so make
the choices of these types more accurate (with a NEWS entry as for
the other changes to these types on particular architectures).
* s390: sysdeps/s390/bits/flt-eval-method.h always defines
__GLIBC_FLT_EVAL_METHOD to 1 to replicate the existing logic. As
previously discussed, it might make sense in coordination with GCC
to eliminate the historic mistake, avoid excess precision in the
-fexcess-precision=standard case and make the typedefs match (with a
NEWS entry, again).
Tested for x86-64 and x86. Also did compilation-only testing with
build-many-glibcs.py.
* bits/flt-eval-method.h: New file.
* sysdeps/m68k/m680x0/bits/flt-eval-method.h: Likewise.
* sysdeps/s390/bits/flt-eval-method.h: Likewise.
* sysdeps/x86/bits/flt-eval-method.h: Likewise.
* math/Makefile (headers): Add bits/flt-eval-method.h.
* math/math.h: Include <bits/flt-eval-method.h>.
[__USE_ISOC99] (float_t): Define based on __GLIBC_FLT_EVAL_METHOD.
[__USE_ISOC99] (double_t): Likewise.
* bits/mathdef.h (float_t): Remove.
(double_t): Likewise.
* sysdeps/aarch64/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/alpha/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/arm/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/hppa/fpu/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/ia64/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/m68k/m680x0/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/mips/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/powerpc/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/s390/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/sh/sh4/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/sparc/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/tile/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
* sysdeps/x86/bits/mathdef.h (float_t): Likewise.
(double_t): Likewise.
When glibc is compiled with gcc 6.2 that has been configured with
to default to PIC/PIE, the static version of __memcpy_chk is not built,
as the test is done on PIC instead of SHARED. Fix the test to check for
SHARED, like it is done for similar functions like memmove_chk.
Changelog:
* sysdeps/x86_64/memcpy_chk.S (__memcpy_chk): Check for SHARED
instead of PIC.
ISO C requires that the value of FP_ILOGB0 must be INT_MIN or
-INT_MAX. In sysdeps/sh/sh4/bits/mathdef.h, it's 0x80000001; that is,
a positive unsigned value that would be -INT_MAX if converted to int,
which is not valid (there's no actual constraint on the type, but
whatever the type the integer value must be one of the two permitted,
and types other than int don't really make sense). This patch makes
the ABI-compatible change to (-0x7fffffff).
(The testcase handles positive and negative sign separately to avoid
any issues with implicit conversions that could result in e.g. INT_MIN
converted to uintmax_t wrongly passing.)
Tested (compilation only) with build-many-glibcs.py.
[BZ #20859]
* sysdeps/sh/sh4/bits/mathdef.h (FP_ILOGB0): Define to
(-0x7fffffff) instead of 0x80000001.
* math/test-fp-ilogb-constants.c: New file.
* math/Makefile (tests): Add test-fp-ilogb-constants.
In a microMIPS compilation of `.init' code use the R_MICROMIPS_JALR
relocation intended for PIC call relaxation in microMIPS code rather
than the corresponding R_MIPS_JALR relocation meant for regular MIPS
code only.
* sysdeps/mips/mips32/crti.S (JALR_RELOC): New macro.
(_init): Use it in place of hardcoded R_MIPS_JALR.
* sysdeps/mips/mips64/n32/crti.S (JALR_RELOC): New macro.
(_init): Use it in place of hardcoded R_MIPS_JALR.
* sysdeps/mips/mips64/n64/crti.S (JALR_RELOC): New macro.
(_init): Use it in place of hardcoded R_MIPS_JALR.
Bug 20787 reports that, while float_t and double_t for 32-bit x86
properly respect -mfpmath=sse, for x86_64 they fail to reflect
-mfpmath=387, which is valid if unusual and results in FLT_EVAL_METHOD
being 2. This patch fixes the definitions to respect
__FLT_EVAL_METHOD__ in that case, arranging for the test that the
types correspond with FLT_EVAL_METHOD to be run with both -mfpmath=387
and -mfpmath=sse.
Note: this patch will also have the effect of making float_t and
double_t be long double for x86_64 with -mfpmath=sse+387, when
FLT_EVAL_METHOD is -1. It seems reasonable for x86_64 to be
consistent with 32-bit x86 in this case (and that definition is
conservatively safe, in that it makes the types correspond to the
widest evaluation format that might be used).
Tested for x86-64 and x86.
[BZ #20787]
* sysdeps/x86/bits/mathdef.h (float_t): Do not define to float if
[__x86_64__] when __FLT_EVAL_METHOD__ is nonzero.
(double_t): Do not define to double if [__x86_64__] when
__FLT_EVAL_METHOD__ is nonzero.
* sysdeps/x86/fpu/test-flt-eval-method-387.c: New file.
* sysdeps/x86/fpu/test-flt-eval-method-sse.c: Likewise.
* sysdeps/x86/fpu/Makefile [$(subdir) = math] (tests): Add
test-flt-eval-method-387 and test-flt-eval-method-sse.
[$(subdir) = math] (CFLAGS-test-flt-eval-method-387.c): New
variable.
[$(subdir) = math] (CFLAGS-test-flt-eval-method-sse.c): Likewise.
* sysdeps/unix/sysv/linux/fstatfs64.c: Hide prototypes for fstatfs
and __fstatfs. Make them aliases of __fstatfs64 if
STATFS_IS_STATFS64 is set to non-zero.
* sysdeps/unix/sysv/linux/statfs64.c: Ditto for __statfs, statfs,
and __statfs64.
* sysdeps/unix/sysv/linux/generic/wordsize-32/fstatfs.c: Do not
define __fstatfs and fstatfs if STATFS_IS_STATFS64 is non-zero.
* sysdeps/unix/sysv/linux/generic/wordsize-32/statfs.c: Ditto
for __statfs and statfs.
* sysdeps/unix/sysv/linux/alpha/kernel_stat.h: Set STATFS_IS_STATFS64
to 0.
* sysdeps/unix/sysv/linux/generic/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/hppa/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/ia64/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/microblaze/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/mips/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/s390/s390-64/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/sparc/sparc32/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/sparc/sparc64/kernel_stat.h: Ditto.
* sysdeps/unix/sysv/linux/x86_64/kernel_stat.h: Ditto.
TS 18661-1 defines functions for manipulating the payloads of NaNs.
This patch implements the setpayload functions for glibc; these set a
number (pointed to by a function argument) to a quiet NaN with the
given payload, or to +0 if the given payload is not valid. The
implementations are structured to allow the substance of the
implementation to be shared with the setpayloadsig functions when
those are added.
The semantics in the TS are not entirely clear in the case where the
payload passed to the function is zero (see discussion on the WG14
reflector last month). This patch implements what seems the most
sensible interpretation, that -0 is never valid to give as the
payload, but +0 is valid in the case where the kind of NaN being
generated has its high mantissa bit set so payload 0 is actually
possible in such a NaN.
Tested for x86_64, x86, mips64 and powerpc.
* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
(setpayload): New declaration.
* math/Versions (setpayload): New libm symbol at version
GLIBC_2.25.
(setpayloadf): Likewise.
(setpayloadl): Likewise.
* math/Makefile (libm-calls): Add s_setpayloadF.
* math/libm-test.inc (struct test_Ffp_b1_data): Rename to struct
test_Ff_b1_data.
(RUN_TEST_Ff_b1): New macro.
(RUN_TEST_LOOP_Ff_b1): Likewise.
(canonicalize_test_data): Update type.
(setpayload_test_data): New array.
(setpayload_test): New function.
(main): Call setpayload_test.
* manual/arith.texi (FP Bit Twiddling): Document setpayload,
setpayloadf and setpayloadl.
* manual/libm-err-tab.pl: Update comment on interfaces without
ulps tabulated.
* sysdeps/ieee754/dbl-64/s_setpayload.c: New file.
* sysdeps/ieee754/dbl-64/s_setpayload_main.c: Likewise.
* sysdeps/ieee754/dbl-64/wordsize-64/s_setpayload_main.c:
Likewise.
* sysdeps/ieee754/flt-32/s_setpayloadf.c: Likewise.
* sysdeps/ieee754/flt-32/s_setpayloadf_main.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_setpayloadl.c: Likewise.
* sysdeps/ieee754/ldbl-128/s_setpayloadl_main.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_setpayloadl.c: Likewise.
* sysdeps/ieee754/ldbl-128ibm/s_setpayloadl_main.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_setpayloadl.c: Likewise.
* sysdeps/ieee754/ldbl-96/s_setpayloadl_main.c: Likewise.
* sysdeps/ieee754/ldbl-opt/nldbl-setpayload.c: Likewise.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
setpayload.
(CFLAGS-nldbl-setpayload.c): New variable.
* sysdeps/nacl/libm.abilist: Update.
* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
This patch fixes some hurd bits from commit afcf3cd8eb that added the
__access_noerrno internal symbol. It basically removes the nonrequired
__hurd_fail_noerrno (since the 'err' argument is ignored) and fixes
a typo for EACCES.
However, as stated on maillist [1] this __access_noerrno may still be
unsafe to run during initialization of tunables on the Hurd. The
access_common calls __hurd_file_name_lookup, which calls
__hurd_file_name_lookup_retry, which can set errno.
[1] https://sourceware.org/ml/libc-alpha/2016-11/msg00646.html
The header makes tile use the new mechanisms for suppressing
exception and rounding support (the ROUNDING_TESTS_xxx() and
EXCEPTION_TESTS_xxx macros).
More importantly, it also now sets SNAN_TESTS_PRESERVE_PAYLOAD to 0,
since the tilegx fp hardware does not preserve NaN payloads.
