Florian Weimer [Wed, 8 Apr 2015 17:11:21 +0000 (19:11 +0200)]
pldd: Use struct scratch_buffer instead of extend_alloca
Joseph Myers [Wed, 8 Apr 2015 17:56:15 +0000 (17:56 +0000)]
Add more tests of cbrt.
This patch adds some randomly-generated tests of cbrt that are
observed to increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of cbrt.
* math/auto-libm-test-out: Regenerated.
* sysdeps/x86_64/fpu/libm-test-ulps: Update.
Joseph Myers [Wed, 8 Apr 2015 17:46:07 +0000 (17:46 +0000)]
Add more tests of cabs.
This patch adds some randomly-generated tests of cabs that are
observed to increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of cabs.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Wed, 8 Apr 2015 17:32:17 +0000 (17:32 +0000)]
Fix dbl-64 atan2 in non-default rounding modes (bug 18210, bug 18211).
The dbl-64 implementation of atan2 does computations that expect to
run in round-to-nearest mode, and in other modes the errors can
accumulate to more than the maximum accepted 9ulp. This patch makes
it use FE_TONEAREST internally, similar to other functions with such
issues. Tests that previously produced large errors are added for
atan2 and the closely related carg, clog and clog10 functions.
Tested for x86_64 and x86 and ulps updated accordingly.
[BZ #18210]
[BZ #18211]
* sysdeps/ieee754/dbl-64/e_atan2.c: Include <fenv.h>.
(__ieee754_atan2): Set FE_TONEAREST mode for internal
computations.
* math/auto-libm-test-in: Add more tests of atan2, carg, clog and
clog10.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Wed, 8 Apr 2015 17:14:12 +0000 (17:14 +0000)]
Fix dbl-64 atan in non-default rounding modes (bug 18197).
The dbl-64 implementation of atan does computations that expect to run
in round-to-nearest mode, and in other modes the errors can accumulate
to more than the maximum accepted 9ulp. This patch makes it use
FE_TONEAREST internally, similar to other functions with such issues.
Tested for x86_64 and x86; no ulps updates needed.
[BZ #18197]
* sysdeps/ieee754/dbl-64/s_atan.c: Include <fenv.h>.
(atan): Set FE_TONEAREST mode for internal computations.
* math/auto-libm-test-in: Add more tests of atan.
* math/auto-libm-test-out: Regenerated.
James Cowgill [Tue, 7 Apr 2015 17:23:54 +0000 (17:23 +0000)]
[BZ #17930] MIPS: Define SHM_NORESERVE.
[BZ #17930]
* sysdeps/unix/sysv/linux/mips/bits/shm.h (SHM_NORESERVE): Define.
Florian Weimer [Tue, 7 Apr 2015 15:46:58 +0000 (17:46 +0200)]
scratch_buffer_grow_preserve: Add missing #include <string.h>
Florian Weimer [Tue, 7 Apr 2015 09:03:43 +0000 (11:03 +0200)]
Add struct scratch_buffer and its internal helper functions
These will be used from NSS modules, so they have to be exported.
Richard Henderson [Mon, 6 Apr 2015 17:43:59 +0000 (10:43 -0700)]
math/test-fenvinline: Cast fe_exc to unsigned int before printing
On Alpha and IA-64, fexcept_t is unsigned long. But all the values
fit within an int, so the cast is ok for printing. All other hosts
use unsigned int or unsigned short already.
Richard Henderson [Mon, 6 Apr 2015 17:38:16 +0000 (10:38 -0700)]
alpha: Update libm-test-ulps
Regenerated from scratch.
Richard Henderson [Mon, 6 Apr 2015 17:36:44 +0000 (10:36 -0700)]
alpha: Unconditionally include dl-sysdep.h in sysdep.h
Fixes a -Wundef error wrt RTLD_PRIVATE_ERRNO.
Ondřej Bílka [Fri, 3 Apr 2015 13:46:29 +0000 (15:46 +0200)]
Handle mblen return code when n is zero.
Florian Weimer [Thu, 2 Apr 2015 08:07:04 +0000 (10:07 +0200)]
Define libc_max_align_t for internal use
Andreas Schwab [Tue, 30 Sep 2014 10:41:11 +0000 (12:41 +0200)]
aarch64: Increase MINSIGSTKSZ and SIGSTKSZ (bug 16850)
Mel Gorman [Thu, 2 Apr 2015 06:44:14 +0000 (12:14 +0530)]
malloc: Consistently apply trim_threshold to all heaps [BZ #17195]
Trimming heaps is a balance between saving memory and the system overhead
required to update page tables and discard allocated pages. The malloc
option M_TRIM_THRESHOLD is a tunable that users are meant to use to decide
where this balance point is but it is only applied to the main arena.
For scalability reasons, glibc malloc has per-thread heaps but these are
shrunk with madvise() if there is one page free at the top of the heap.
In some circumstances this can lead to high system overhead if a thread
has a control flow like
while (data_to_process) {
buf = malloc(large_size);
do_stuff();
free(buf);
}
For a large size, the free() will call madvise (pagetable teardown, page
free and TLB flush) every time followed immediately by a malloc (fault,
kernel page alloc, zeroing and charge accounting). The kernel overhead
can dominate such a workload.
This patch allows the user to tune when madvise gets called by applying
the trim threshold to the per-thread heaps and using similar logic to the
main arena when deciding whether to shrink. Alternatively if the dynamic
brk/mmap threshold gets adjusted then the new values will be obeyed by
the per-thread heaps.
Bug 17195 was a test case motivated by a problem encountered in scientific
applications written in python that performance badly due to high page fault
overhead. The basic operation of such a program was posted by Julian Taylor
https://sourceware.org/ml/libc-alpha/2015-02/msg00373.html
With this patch applied, the overhead is eliminated. All numbers in this
report are in seconds and were recorded by running Julian's program 30
times.
pyarray
glibc madvise
2.21 v2
System min 1.81 ( 0.00%) 0.00 (100.00%)
System mean 1.93 ( 0.00%) 0.02 ( 99.20%)
System stddev 0.06 ( 0.00%) 0.01 ( 88.99%)
System max 2.06 ( 0.00%) 0.03 ( 98.54%)
Elapsed min 3.26 ( 0.00%) 2.37 ( 27.30%)
Elapsed mean 3.39 ( 0.00%) 2.41 ( 28.84%)
Elapsed stddev 0.14 ( 0.00%) 0.02 ( 82.73%)
Elapsed max 4.05 ( 0.00%) 2.47 ( 39.01%)
glibc madvise
2.21 v2
User 141.86 142.28
System 57.94 0.60
Elapsed 102.02 72.66
Note that almost a minutes worth of system time is eliminted and the
program completes 28% faster on average.
To illustrate the problem without python this is a basic test-case for
the worst case scenario where every free is a madvise followed by a an alloc
/* gcc bench-free.c -lpthread -o bench-free */
static int num = 1024;
void __attribute__((noinline,noclone)) dostuff (void *p)
{
}
void *worker (void *data)
{
int i;
for (i = num; i--;)
{
void *m = malloc (48*4096);
dostuff (m);
free (m);
}
return NULL;
}
int main()
{
int i;
pthread_t t;
void *ret;
if (pthread_create (&t, NULL, worker, NULL))
exit (2);
if (pthread_join (t, &ret))
exit (3);
return 0;
}
Before the patch, this resulted in 1024 calls to madvise. With the patch applied,
madvise is called twice because the default trim threshold is high enough to avoid
this.
This a more complex case where there is a mix of frees. It's simply a different worker
function for the test case above
void *worker (void *data)
{
int i;
int j = 0;
void *free_index[num];
for (i = num; i--;)
{
void *m = malloc ((i % 58) *4096);
dostuff (m);
if (i % 2 == 0) {
free (m);
} else {
free_index[j++] = m;
}
}
for (; j >= 0; j--)
{
free(free_index[j]);
}
return NULL;
}
glibc 2.21 calls malloc 90305 times but with the patch applied, it's
called 13438. Increasing the trim threshold will decrease the number of
times it's called with the option of eliminating the overhead.
ebizzy is meant to generate a workload resembling common web application
server workloads. It is threaded with a large working set that at its core
has an allocation, do_stuff, free loop that also hits this case. The primary
metric of the benchmark is records processed per second. This is running on
my desktop which is a single socket machine with an I7-4770 and 8 cores.
Each thread count was run for 30 seconds. It was only run once as the
performance difference is so high that the variation is insignificant.
glibc 2.21 patch
threads 1 10230 44114
threads 2 19153 84925
threads 4 34295 134569
threads 8 51007 183387
Note that the saving happens to be a concidence as the size allocated
by ebizzy was less than the default threshold. If a different number of
chunks were specified then it may also be necessary to tune the threshold
to compensate
This is roughly quadrupling the performance of this benchmark. The difference in
system CPU usage illustrates why.
ebizzy running 1 thread with glibc 2.21
10230 records/s 306904
real 30.00 s
user 7.47 s
sys 22.49 s
22.49 seconds was spent in the kernel for a workload runinng 30 seconds. With the
patch applied
ebizzy running 1 thread with patch applied
44126 records/s 1323792
real 30.00 s
user 29.97 s
sys 0.00 s
system CPU usage was zero with the patch applied. strace shows that glibc
running this workload calls madvise approximately 9000 times a second. With
the patch applied madvise was called twice during the workload (or 0.06
times per second).
2015-02-10 Mel Gorman <mgorman@suse.de>
[BZ #17195]
* malloc/arena.c (free): Apply trim threshold to per-thread heaps
as well as the main arena.
H.J. Lu [Tue, 31 Mar 2015 20:17:51 +0000 (13:17 -0700)]
Limit threads sharing L2 cache to 2 for SLM/KNL
Silvermont and Knights Landing have a modular system design with two cores
sharing an L2 cache. If more than 2 cores are detected to shared L2 cache,
it should be adjusted for Silvermont and Knights Landing.
[BZ #18185]
* sysdeps/x86_64/cacheinfo.c (init_cacheinfo): Limit threads
sharing L2 cache to 2 for Silvermont/Knights Landing.
H.J. Lu [Tue, 31 Mar 2015 12:20:55 +0000 (05:20 -0700)]
Add a testcase for copy reloc against protected data
Linkers in some versions of binutils 2.25 and 2.26 don't support protected
data symbol with error messsage like:
/usr/bin/ld: copy reloc against protected `bar' is invalid
/usr/bin/ld: failed to set dynamic section sizes: Bad value
We check if linker supports copy reloc against protected data symbol to
avoid running the test if linker is broken.
[BZ #17711]
* config.make.in (have-protected-data): New.
* configure.ac: Check linker support for protected data symbol.
* configure: Regenerated.
* elf/Makefile (modules-names): Add tst-protected1moda and
tst-protected1modb if $(have-protected-data) is yes.
(tests): Add tst-protected1a and tst-protected1b if
$(have-protected-data) is yes.
($(objpfx)tst-protected1a): New.
($(objpfx)tst-protected1b): Likewise.
(tst-protected1modb.so-no-z-defs): Likewise.
* elf/tst-protected1a.c: New file.
* elf/tst-protected1b.c: Likewise.
* elf/tst-protected1mod.h: Likewise.
* elf/tst-protected1moda.c: Likewise.
* elf/tst-protected1modb.c: Likewise.
H.J. Lu [Tue, 31 Mar 2015 12:15:43 +0000 (05:15 -0700)]
Add ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA to x86
With copy relocation, address of protected data defined in the shared
library may be external. When there is a relocation against the
protected data symbol within the shared library, we need to check if we
should skip the definition in the executable copied from the protected
data. This patch adds ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA and defines
it for x86. If ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA isn't 0, do_lookup_x
will skip the data definition in the executable from copy reloc.
[BZ #17711]
* elf/dl-lookup.c (do_lookup_x): When UNDEF_MAP is NULL, which
indicates it is called from do_lookup_x on relocation against
protected data, skip the data definion in the executable from
copy reloc.
(_dl_lookup_symbol_x): Pass ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA,
instead of ELF_RTYPE_CLASS_PLT, to do_lookup_x for
EXTERN_PROTECTED_DATA relocation against STT_OBJECT symbol.
* sysdeps/generic/ldsodefs.h * (ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA):
New. Defined to 4 if DL_EXTERN_PROTECTED_DATA is defined,
otherwise to 0.
* sysdeps/i386/dl-lookupcfg.h (DL_EXTERN_PROTECTED_DATA): New.
* sysdeps/i386/dl-machine.h (elf_machine_type_class): Set class
to ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA for R_386_GLOB_DAT.
* sysdeps/x86_64/dl-lookupcfg.h (DL_EXTERN_PROTECTED_DATA): New.
* sysdeps/x86_64/dl-machine.h (elf_machine_type_class): Set class
to ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA for R_X86_64_GLOB_DAT.
Martin Galvan [Sat, 28 Mar 2015 04:41:35 +0000 (01:41 -0300)]
NPTL: Remove duplicate definition of PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
The PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP macro was defined twice with the
same values in pthread.h; this removes the second definition.
Martin Galvan [Sat, 28 Mar 2015 04:31:56 +0000 (01:31 -0300)]
NPTL: swap comments for THREAD_SETMEM and THREAD_SETMEM_NC for i386 and x86_64
The comments for THREAD_SETMEM and THREAD_SETMEM_NC were swapped for
i386 and x86_64; this patch fixes that.
Roland McGrath [Fri, 27 Mar 2015 19:55:25 +0000 (12:55 -0700)]
Convert dlfcn/tststatic to use test-skeleton.
Alan Modra [Thu, 26 Mar 2015 02:00:45 +0000 (12:30 +1030)]
Harden powerpc64 elf_machine_fixup_plt
IFUNC is difficult to correctly implement on any target needing a GOT
to support position independent code, due to the dependency on order
of dynamic relocations. ld.so should be changed to apply IFUNC
relocations last, globally, because without that it is actually
impossible to write an IFUNC resolver in C that works in all
situations. Case in point, vfork in libpthread.so is an IFUNC with
the resolver returning &__libc_vfork. (system and fork are similar.)
If another shared library, libA say, uses vfork then it is quite
possible that libpthread.so hasn't been dynamically relocated before
the unfortunate libA is dynamically relocated. In that case the GOT
entry for &__libc_vfork is still zero, so the IFUNC resolver returns
NULL. LD_BIND_NOW=1 results in libA PLT dynamic relocations being
applied using this NULL value and ld.so segfaults.
This patch hardens ld.so to not segfault on a NULL from an IFUNC
resolver. It also fixes a problem with undefined weak. If you leave
the plt entry as-is for undefined weak then if the entry is ever
called it will loop in ld.so rather than segfaulting.
* sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_fixup_plt):
Don't segfault if ifunc resolver returns a NULL. Do set plt to
zero for undefined weak.
(elf_machine_plt_conflict): Similarly.
Joseph Myers [Wed, 25 Mar 2015 22:21:20 +0000 (22:21 +0000)]
Add more tests of acosh, asinh and atanh.
This patch adds some randomly-generated tests of acosh, asinh and
atanh that are observed to increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of acosh, asinh and
atanh.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Wed, 25 Mar 2015 21:57:04 +0000 (21:57 +0000)]
Add another test of asin.
This patch adds a randomly-generated test of asin that is observed to
increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add another test of asin.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Wed, 25 Mar 2015 21:21:18 +0000 (21:21 +0000)]
Remove unused macros from i386 lowlevellock.h.
In the course of the work on six-argument syscalls I noticed that the
i386 lowlevellock.h contained some unused macro definitions (already
unused before my patch). This patch removes them.
Tested for x86 that installed stripped shared libraries are unchanged
by this patch.
* sysdeps/unix/sysv/linux/i386/lowlevellock.h (LLL_EBX_LOAD):
Remove macro.
(LLL_EBX_REG): Likewise.
(LLL_ENTER_KERNEL): Likewise.
Joseph Myers [Wed, 25 Mar 2015 17:53:58 +0000 (17:53 +0000)]
Add more tests of asin.
This patch adds some randomly-generated tests of asin that are
observed to increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of asin.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Wed, 25 Mar 2015 15:17:54 +0000 (15:17 +0000)]
Support six-argument syscalls from C for 32-bit x86, use generic lowlevellock-futex.h (bug 18138).
This patch follows the approach outlined in
<https://sourceware.org/ml/libc-alpha/2015-03/msg00656.html> to
support six-argument syscalls from INTERNAL_SYSCALL for 32-bit x86,
making them call a function __libc_do_syscall that takes the syscall
number and three syscall arguments in the registers in which the
kernel expects them, along with a pointer to a structure containing
the other three arguments.
In turn, this allows the generic lowlevellock-futex.h to be used on
32-bit x86, so supporting lll_futex_timed_wait_bitset (and so allowing
FUTEX_CLOCK_REALTIME to be used in various cases, so fixing bug 18138
for 32-bit x86 and leaving hppa as the only architecture missing
lll_futex_timed_wait_bitset). The change to lowlevellock.h's
definition of SYS_futex is because the generic lowlevelloc-futex.h
ends up bringing in bits/syscall.h which defines SYS_futex to
__NR_futex, so resulting in redefinition errors. The revised
definition in lowlevellock.h is in line with what the x86_64 version
does.
__libc_do_syscall is only needed in libpthread at present (meaning
nothing special needs to be done to make it shared-only in most
libraries containing it, static in libc only, as on ARM).
Tested for 32-bit x86, with the glibc testsuite and with the test in
bug 18138. The failures seen
FAIL: nptl/tst-cleanupx4
FAIL: rt/tst-cpuclock2
are pre-existing.
[BZ #18138]
* sysdeps/unix/sysv/linux/i386/sysdep.h (struct
libc_do_syscall_args): New structure.
(INTERNAL_SYSCALL_MAIN_0): New macro.
(INTERNAL_SYSCALL_MAIN_1): Likewise.
(INTERNAL_SYSCALL_MAIN_2): Likewise.
(INTERNAL_SYSCALL_MAIN_3): Likewise.
(INTERNAL_SYSCALL_MAIN_4): Likewise.
(INTERNAL_SYSCALL_MAIN_5): Likewise.
(INTERNAL_SYSCALL_MAIN_6): Likewise. Call __libc_do_syscall.
(INTERNAL_SYSCALL): Define to use INTERNAL_SYSCALL_MAIN_##nr.
Replace conditional definitions by conditional definitions of ....
(INTERNAL_SYSCALL_MAIN_INLINE): ... this. New macro.
* sysdeps/unix/sysv/linux/i386/libc-do-syscall.S: New file.
* sysdeps/unix/sysv/linux/i386/Makefile [$(subdir) = nptl]
(libpthread-sysdep_routines): Add libc-do-syscall.
* sysdeps/unix/sysv/linux/i386/lowlevellock-futex.h: Remove file.
* sysdeps/unix/sysv/linux/i386/lowlevellock.h (SYS_futex): Define
to __NR_futex not 240.
Alan Modra [Wed, 25 Mar 2015 05:23:47 +0000 (15:53 +1030)]
powerpc __tls_get_addr call optimization
This patch is glibc support for a PowerPC TLS optimization, inspired
by Alexandre Oliva's TLS optimization for other processors,
http://www.lsd.ic.unicamp.br/~oliva/writeups/TLS/RFC-TLSDESC-x86.txt
In essence, this optimization uses a zero module id in the tls_index
GOT entry to indicate that a TLS variable is allocated space in the
static TLS area. A special plt call linker stub for __tls_get_addr
checks for such a tls_index and if found, returns the offset
immediately. The linker communicates the fact that the special
__tls_get_addr stub is used by setting a bit in the dynamic tag
DT_PPC64_OPT/DT_PPC_OPT. glibc communicates to the linker that this
optimization is available by the presence of __tls_get_addr_opt.
tst-tlsmod2.so is built with -Wl,--no-tls-get-addr-optimize for
tst-tls-dlinfo, which otherwise would fail since it tests that no
static tls is allocated. The ld option --no-tls-get-addr-optimize has
been available since binutils-2.20 so doesn't need a configure test.
* NEWS: Advertise TLS optimization.
* elf/elf.h (R_PPC_TLSGD, R_PPC_TLSLD, DT_PPC_OPT, PPC_OPT_TLS): Define.
(DT_PPC_NUM): Increment.
* elf/dynamic-link.h (HAVE_STATIC_TLS): Define.
(CHECK_STATIC_TLS): Use here.
* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela): Optimize
TLS descriptors.
* sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_rela): Likewise.
* sysdeps/powerpc/dl-tls.c: New file.
* sysdeps/powerpc/Versions: Add __tls_get_addr_opt.
* sysdeps/powerpc/tst-tlsopt-powerpc.c: New tls test.
* sysdeps/unix/sysv/linux/powerpc/Makefile: Add new test.
Build tst-tlsmod2.so with --no-tls-get-addr-optimize.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/ld.abilist: Update.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/ld.abilist: Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/ld-le.abilist: Likewise.
Alan Modra [Wed, 25 Mar 2015 05:15:36 +0000 (15:45 +1030)]
powerpc64 configure message
This feature doesn't depend on the linker, as can be seen from the
actual test. It's a compiler feature.
* sysdeps/powerpc/powerpc64/configure.ac: Correct "linker support
for overlapping .opd entries" to "support...".
* sysdeps/powerpc/powerpc64/configure: Regenerate
Joseph Myers [Wed, 25 Mar 2015 00:30:10 +0000 (00:30 +0000)]
Add more tests of acos.
This patch adds some randomly-generated tests of acos that are
observed to increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of acos.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Wed, 25 Mar 2015 00:05:13 +0000 (00:05 +0000)]
Add more tests of expm1.
This patch adds some randomly-generated tests of expm1 that are
observed to increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of expm1.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Tue, 24 Mar 2015 23:48:04 +0000 (23:48 +0000)]
Add more tests of cosh, sinh.
This patch adds some randomly-generated tests of cosh and sinh that
are observed to increase ulps on x86_64.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of cosh and sinh.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Tue, 24 Mar 2015 23:30:19 +0000 (23:30 +0000)]
Regenerate x86_64, x86 ulps from scratch.
The x86_64 and x86 libm-test-ulps files hadn't been regenerated from
scratch for some time, as evidenced by the presence of entries for
*_tonearest functions (those tests duplicated the
default-rounding-mode tests, and such duplicates are no longer run).
The aarch64, alpha, hppa, ia64, m68k, microblaze, powerpc, s390, sh,
sparc, tile files similarly could do with from-scratch regeneration as
evidenced by the presence of such entries. (Truncate the existing
file then run "make regen-ulps" and move the resulting file into
place.)
This patch regenerates the x86_64 and x86 files from scratch. It's
likely some of the reduced / removed ulps will need restoring because
they appear on processors or compiler versions other than the one I
tested on, but in such cases I'd like to first see if I can generate
new tests that show such ulps on the Intel processor I'm testing on,
to reduce the effects from different people using different processors
and compilers to regenerate the ulps.
* sysdeps/i386/fpu/libm-test-ulps: Regenerated.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Joseph Myers [Tue, 24 Mar 2015 23:06:28 +0000 (23:06 +0000)]
Add more tests of log2.
In testing for x86_64 on an AMD processor, I observed libm test
failures of the form:
testing long double (without inline functions)
Failure: Test: log2_downward (0x2.b7e151628aed4p+0)
Result:
is: 1.
44269504088896356633e+00 0xb.8aa3b295c17f67600000p-3
should be: 1.
44269504088896356622e+00 0xb.8aa3b295c17f67500000p-3
difference: 1.
08420217248550443400e-19 0x8.00000000000000000000p-66
ulp : 1.0000
max.ulp : 0.0000
Maximal error of `log2_downward'
is : 1 ulp
accepted: 0 ulp
These issues arise because the maximum ulps when regenerating on one
processor are not the same as on another processor, so regeneration on
several processors may be needed when updating libm-test-ulps to avoid
failures for some users testing glibc - but such regeneration on
multiple processors is inconvenient. Causes can be: on x86 and, for
x86_64, for long double, variation in results of x87 instructions for
transcendental operations between processors; on x86, variation in
compiler excess precision between compiler versions and
configurations; on any processor where the compiler may contract
expressions using fused multiply-add, variation in what contraction
occurs.
Although it's hard to be sure libm-test-ulps covers all ulps that may
be seen in any configuration for the given architecture, in practice
it helps simply to add wider test coverage to make it more likely
that, when testing on one processor, the ulps seen are the biggest
that can be seen for that function on that processor, and hopefully
they are also the biggest that can be seen for that function in other
configurations for that architecture. Thus, this patch adds some
tests of log2 that increase the ulps I see on x86_64 on an Intel
processor, so that hopefully future from-scratch regenerations on that
processor will produce ulps big enough not to have errors from testing
on AMD processors. These tests were found by randomly generating
inputs and seeing what produced ulps larger than those currently in
libm-test-ulps. Of course such increases also improve the accuracy of
the empirical table of known ulps generated from libm-test-ulps files
that goes in the manual.
Tested for x86_64 and x86 and ulps updated accordingly.
* math/auto-libm-test-in: Add more tests of log2.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Roland McGrath [Mon, 23 Mar 2015 20:46:36 +0000 (13:46 -0700)]
Minor cleanups in libio/iofdopen.c
Florian Weimer [Mon, 23 Mar 2015 15:34:48 +0000 (16:34 +0100)]
pthread_setaffinity (Linux variant): Rewrite to use VLA instead of alloca
extend_alloca was used to emulate VLA deallocation. The new version
also handles the res == 0 corner case more explicitly, by returning 0
instead of the (potentially undefined, but usually zero) system call
error.
Florian Weimer [Mon, 23 Mar 2015 15:12:38 +0000 (16:12 +0100)]
Avoid SIGFPE in wordexp [BZ #18100]
Check for a zero divisor and integer overflow before performing
division in arithmetic expansion.
Alan Modra [Thu, 19 Mar 2015 07:58:38 +0000 (18:28 +1030)]
Remove HAVE_ASM_PPC_REL16 references
In
bc0cdc498 the configure check for HAVE_ASM_PPC_REL16 was removed
on the grounds that the minimum binutils supports rel16 relocs. This
is true, but not all references to HAVE_ASM_PPC_REL16 in the sources
were removed.
* config.h.in: Remove HAVE_ASM_PPC_REL16.
* sysdeps/powerpc/powerpc32/tls-macros.h: Remove HAVE_ASM_PPC_REL16
and false branch of conditional.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext-common.S:
Likewise.
Samuel Thibault [Sun, 22 Mar 2015 23:28:42 +0000 (00:28 +0100)]
Add more exception to local headers list
* scripts/check-local-headers.sh (exclude): Add device/,
hurd/hurd_types.h, hurd/ioctl_types.h, hurd/paths.h, hurd/ioctls.defs,
cthreads.h.
Samuel Thibault [Sun, 22 Mar 2015 16:27:51 +0000 (17:27 +0100)]
Fix visibility of EXTPROC macro
* bits/termios.h [!__USE_MISC] (EXTPROC): Do not define.
Joseph Myers [Sat, 21 Mar 2015 17:50:13 +0000 (17:50 +0000)]
Note old commit as having resolved bug 11505.
Samuel Thibault [Sat, 21 Mar 2015 03:49:44 +0000 (04:49 +0100)]
Fix warnings
* sysdeps/mach/hurd/Makefile ($(common-objpfx)errnos.d): Depend on
libc-modules.h
* sysdeps/mach/hurd/i386/trampoline.c (_hurd_setup_sighandler): Remove
unused declaration of _hurd_intr_rpc_msg_in_trap.
* mach/mach_init.c (__mach_init): Test whether HAVE_HOST_PAGE_SIZE is
defined instead of whether it is non-zero.
* sysdeps/mach/hurd/i386/intr-msg.h (INTR_MSG_TRAP): Use "+m"
input constraint instead of both input and output constraint. Use ecx
clobber instead of %ecx.
* sysdeps/mach/hurd/malloc-machine.h (mutex_init, mutex_lock,
mutex_unlock): Use a statement expression instead of an expression list.
* sysdeps/mach/hurd/setitimer.c (_hurd_itimer_thread_stack_size): Set
type to vm_size_t instead of vm_address_t.
* sysdeps/mach/hurd/fork.c (__fork): Test whether STACK_GROWTH_UP is
defined instead of whether it is non-zero.
* hurd/hurd/ioctl.h (_hurd_locked_install_cttyid): New declaration.
* sysdeps/mach/hurd/setsid.c: Include <hurd/ioctl.h>.
* sysdeps/mach/hurd/mmap.c (__mmap): Use 0 instead of NULL for
comparisons with mapaddr.
* nscd/nscd-client.h: Include <time.h>.
* sysdeps/mach/hurd/dl-sysdep.c (fmh): Pass vm_offset_t dummy
9th parameter to __vm_region instead of int.
Samuel Thibault [Sat, 21 Mar 2015 00:19:23 +0000 (01:19 +0100)]
Add missing dependency
* sysdeps/mach/hurd/Makefile ($(common-objpfx)errnos.d): Depend on
libc-modules.h
Roland McGrath [Thu, 19 Mar 2015 19:45:24 +0000 (12:45 -0700)]
ARM: Fix memcpy & memmove for [ARM_ALWAYS_BX]
Chris Metcalf [Thu, 19 Mar 2015 17:33:01 +0000 (13:33 -0400)]
linux-generic: add a README
Joseph Myers [Wed, 18 Mar 2015 17:05:38 +0000 (17:05 +0000)]
Make sem_timedwait use FUTEX_CLOCK_REALTIME (bug 18138).
sem_timedwait converts absolute timeouts to relative to pass them to
the futex syscall. (Before the recent reimplementation, on x86_64 it
used FUTEX_CLOCK_REALTIME, but not on other architectures.)
Correctly implementing POSIX requirements, however, requires use of
FUTEX_CLOCK_REALTIME; passing a relative timeout to the kernel does
not conform to POSIX. The POSIX specification for sem_timedwait says
"The timeout shall be based on the CLOCK_REALTIME clock.". The POSIX
specification for clock_settime says "If the value of the
CLOCK_REALTIME clock is set via clock_settime(), the new value of the
clock shall be used to determine the time of expiration for absolute
time services based upon the CLOCK_REALTIME clock. This applies to the
time at which armed absolute timers expire. If the absolute time
requested at the invocation of such a time service is before the new
value of the clock, the time service shall expire immediately as if
the clock had reached the requested time normally.". If a relative
timeout is passed to the kernel, it is interpreted according to the
CLOCK_MONOTONIC clock, and so fails to meet that POSIX requirement in
the event of clock changes.
This patch makes sem_timedwait use lll_futex_timed_wait_bitset with
FUTEX_CLOCK_REALTIME when possible, as done in some other places in
NPTL. FUTEX_CLOCK_REALTIME is always available for supported Linux
kernel versions; unavailability of lll_futex_timed_wait_bitset is only
an issue for hppa (an issue noted in
<https://sourceware.org/glibc/wiki/PortStatus>, and fixed by the
unreviewed
<https://sourceware.org/ml/libc-alpha/2014-12/msg00655.html> that
removes the hppa lowlevellock.h completely).
In the FUTEX_CLOCK_REALTIME case, the glibc code still needs to check
for negative tv_sec and handle that as timeout, because the Linux
kernel returns EINVAL not ETIMEDOUT for that case, so resulting in
failures of nptl/tst-abstime and nptl/tst-sem13 in the absence of that
check. If we're trying to distinguish between Linux-specific and
generic-futex NPTL code, I suppose having this in an nptl/ file isn't
ideal, but there doesn't seem to be any better place at present.
It's not possible to add a testcase for this issue to the testsuite
because of the requirement to change the system clock as part of a
test (this is a case where testing would require some form of
container, with root in that container, and one whose CLOCK_REALTIME
is isolated from that of the host; I'm not sure what forms of
containers, short of a full virtual machine, provide that clock
isolation).
Tested for x86_64. Also tested for powerpc with the testcase included
in the bug.
[BZ #18138]
* nptl/sem_waitcommon.c: Include <kernel-features.h>.
(futex_abstimed_wait)
[__ASSUME_FUTEX_CLOCK_REALTIME && lll_futex_timed_wait_bitset]:
Use lll_futex_timed_wait_bitset with FUTEX_CLOCK_REALTIME instead
of lll_futex_timed_wait.
Siddhesh Poyarekar [Wed, 18 Mar 2015 09:34:57 +0000 (15:04 +0530)]
Fix up NEWS merge goof-up
Brad Hubbard [Wed, 18 Mar 2015 09:21:26 +0000 (14:51 +0530)]
Use calloc to allocate xports (BZ #17542)
If xports is NULL in xprt_register we malloc it but if sock >
_rpc_dtablesize() that memory does not get initialised and may in theory
contain any value. Later we make a conditional jump in svc_getreq_common
based on the uninitialised memory and this caused a general protection
fault in rpc.statd on an older version of glibc but this code has not
changed since that version.
Following is the valgrind warning.
==26802== Conditional jump or move depends on uninitialised value(s)
==26802== at 0x5343A25: svc_getreq_common (in /lib64/libc-2.5.so)
==26802== by 0x534357B: svc_getreqset (in /lib64/libc-2.5.so)
==26802== by 0x10DE1F: ??? (in /sbin/rpc.statd)
==26802== by 0x10D0EF: main (in /sbin/rpc.statd)
==26802== Uninitialised value was created by a heap allocation
==26802== at 0x4C2210C: malloc (vg_replace_malloc.c:195)
==26802== by 0x53438BE: xprt_register (in /lib64/libc-2.5.so)
==26802== by 0x53450DF: svcudp_bufcreate (in /lib64/libc-2.5.so)
==26802== by 0x10FE32: ??? (in /sbin/rpc.statd)
==26802== by 0x10D13E: main (in /sbin/rpc.statd)
Alexandre Oliva [Tue, 17 Mar 2015 04:14:11 +0000 (01:14 -0300)]
Fix DTV race, assert, DTV_SURPLUS Static TLS limit, and nptl_db garbage
for ChangeLog
[BZ #17090]
[BZ #17620]
[BZ #17621]
[BZ #17628]
* NEWS: Update.
* elf/dl-tls.c (_dl_update_slotinfo): Clean up outdated DTV
entries with Static TLS too. Skip entries past the end of the
allocated DTV, from Alan Modra.
(tls_get_addr_tail): Update to glibc_likely/unlikely. Move
Static TLS DTV entry set up from...
(_dl_allocate_tls_init): ... here (fix modid assertion), ...
* elf/dl-reloc.c (_dl_nothread_init_static_tls): ... here...
* nptl/allocatestack.c (init_one_static_tls): ... and here...
* elf/dlopen.c (dl_open_worker): Drop l_tls_modid upper bound
for Static TLS.
* elf/tlsdeschtab.h (map_generation): Return size_t. Check
that the slot we find is associated with the given map before
using its generation count.
* nptl_db/db_info.c: Include ldsodefs.h.
(rtld_global, dtv_slotinfo_list, dtv_slotinfo): New typedefs.
* nptl_db/structs.def (DB_RTLD_VARIABLE): New macro.
(DB_MAIN_VARIABLE, DB_RTLD_GLOBAL_FIELD): Likewise.
(link_map::l_tls_offset): New struct field.
(dtv_t::counter): Likewise.
(rtld_global): New struct.
(_rtld_global): New rtld variable.
(dl_tls_dtv_slotinfo_list): New rtld global field.
(dtv_slotinfo_list): New struct.
(dtv_slotinfo): Likewise.
* nptl_db/td_symbol_list.c: Drop gnu/lib-names.h include.
(td_lookup): Rename to...
(td_mod_lookup): ... this. Use new mod parameter instead of
LIBPTHREAD_SO.
* nptl_db/td_thr_tlsbase.c: Include link.h.
(dtv_slotinfo_list, dtv_slotinfo): New functions.
(td_thr_tlsbase): Check DTV generation. Compute Static TLS
addresses even if the DTV is out of date or missing them.
* nptl_db/fetch-value.c (_td_locate_field): Do not refuse to
index zero-length arrays.
* nptl_db/thread_dbP.h: Include gnu/lib-names.h.
(td_lookup): Make it a macro implemented in terms of...
(td_mod_lookup): ... this declaration.
* nptl_db/db-symbols.awk (DB_RTLD_VARIABLE): Override.
(DB_MAIN_VARIABLE): Likewise.
H.J. Lu [Mon, 16 Mar 2015 21:58:43 +0000 (14:58 -0700)]
Preserve bound registers in _dl_runtime_resolve
We need to add a BND prefix before indirect branch at the end of
_dl_runtime_resolve to preserve bound registers.
[BZ #18134]
* sysdeps/x86_64/dl-trampoline.S (PRESERVE_BND_REGS_PREFIX): New.
(_dl_runtime_resolve): Add a BND prefix before indirect branch.
Paul Eggert [Mon, 16 Mar 2015 00:06:21 +0000 (17:06 -0700)]
* stdlib/setenv.c (__add_to_environ): Revert previous change.
Andreas Schwab [Fri, 13 Mar 2015 17:21:55 +0000 (18:21 +0100)]
m68k: fix 64-bit arithmetic in atomic operations (bug 18128)
Paul Eggert [Thu, 12 Mar 2015 22:57:07 +0000 (15:57 -0700)]
* stdlib/setenv.c (__add_to_environ):
Dump core quickly if setenv (..., NULL, ...) is called.
Roland McGrath [Fri, 13 Mar 2015 17:10:09 +0000 (10:10 -0700)]
ARM: Rewrite sysdeps/arm/tls-macros.h
Carlos O'Donell [Fri, 13 Mar 2015 13:49:24 +0000 (09:49 -0400)]
Enhance nscd's inotify support (Bug 14906).
In bug 14906 the user complains that the inotify support in nscd
is not sufficient when it comes to detecting changes in the
configurationfiles that should be watched for the various databases.
The current nscd implementation uses inotify to watch for changes in
the configuration files, but adds watches only for IN_DELETE_SELF and
IN_MODIFY. These watches are insufficient to cover even the most basic
uses by a system administrator. For example using emacs or vim to edit
a configuration file should trigger a reload but it might not if
the editors use move to atomically update the file. This atomic update
changes the inode and thus removes the notification on the file (as
inotify is based on inodes). Thus the inotify support in nscd for
configuration files is insufficient to account for the average use
cases of system administrators and users.
The inotify support is significantly enhanced and described here:
https://www.sourceware.org/ml/libc-alpha/2015-02/msg00504.html
Tested on x86_64 with and without inotify support.
Joseph Myers [Thu, 12 Mar 2015 18:43:21 +0000 (18:43 +0000)]
soft-fp: Define and use _FP_STATIC_ASSERT.
This patch makes soft-fp use static assertions in place of conditional
calls to abort, in places where there are checks for conditions (on
the types for which a macro is used) that the code is not prepared to
handle. The fallback definition of _FP_STATIC_ASSERT (for kernel use
only, as only relevant to compilers not supported for building glibc)
is as in misc/sys/cdefs.h.
This means that soft-fp only ever calls abort for _FP_UNREACHABLE
calls in builds with GCC versions before 4.5. Thus, there is no need
for an abort declaration or <stdlib.h> include, since the kernel code
handles defining abort as a macro itself - and so this avoids any need
for an __KERNEL__ condition on the abort declaration to avoid it
breaking with the kernel's macro definition. That is, this patch is
intended to make glibc's soft-fp code suitable for kernel use with no
kernel-local changes to the soft-fp code needed at all.
Tested for powerpc-nofpu that installed stripped shared libraries are
unchanged by the patch. One explicit <stdlib.h> include had to be
added to a file that was relying on the include from soft-fp.h.
* soft-fp/soft-fp.h (_FP_STATIC_ASSERT): New macro.
[_LIBC]: Do not include <stdlib.h>.
[!_LIBC] (abort): Remove declaration.
* soft-fp/op-2.h (_FP_MUL_MEAT_2_120_240_double): Use
_FP_STATIC_ASSERT instead of conditionally calling abort.
* soft-fp/op-common.h (_FP_FROM_INT): Likewise.
(_FP_EXTEND_CNAN): Likewise.
(FP_TRUNC): Likewise.
(__FP_CLZ): Likewise.
* sysdeps/powerpc/nofpu/flt-rounds.c: Include <stdlib.h>.
Yaakov Selkowitz [Thu, 12 Mar 2015 08:20:35 +0000 (03:20 -0500)]
manual: fix XPG basename prototype
* manual/string.texi (XPG basename): Fix prototype.
Stefan Liebler [Thu, 12 Mar 2015 10:08:11 +0000 (11:08 +0100)]
S/390: Fix setcontext/swapcontext which are not restoring sigmask.
Stefan Liebler [Thu, 12 Mar 2015 10:04:13 +0000 (11:04 +0100)]
S/390: Regenerate ULPs
Aurelien Jarno [Thu, 12 Mar 2015 01:03:50 +0000 (21:03 -0400)]
Fix ldconfig segmentation fault with corrupted cache (Bug 18093).
ldconfig is using an aux-cache to speed up the ld.so.cache update. It
is read by mmaping the file to a structure which contains data offsets
used as pointers. As they are not checked, it is not hard to get
ldconfig to segfault with a corrupted file. This happens for instance if
the file is truncated, which is common following a filesystem check
following a system crash.
This can be reproduced for example by truncating the file to roughly
half of it's size.
There is already some code in elf/cache.c (load_aux_cache) to check
for a corrupted aux cache, but it happens to be broken and not enough.
The test (aux_cache->nlibs >= aux_cache_size) compares the number of
libs entry with the cache size. It's a non sense, as it basically
assumes that each library entry is a 1 byte... Instead this commit
computes the theoretical cache size using the headers and compares it
to the real size.
Paul Pluzhnikov [Wed, 11 Mar 2015 15:55:50 +0000 (08:55 -0700)]
Fix BZ #18043 comment # 19: don't call undefined setenv(..., NULL, 1).
Adhemerval Zanella [Tue, 3 Feb 2015 12:41:25 +0000 (07:41 -0500)]
powerpc: Remove HAVE_ASM_GLOBAL_DOT_NAME define
With AIX port deprecated there is no need to check/define
HAVE_ASM_GLOBAL_DOT_NAME anymore since the current minimum binutils
supported (2.22) does not emit global symbol with dot.
This patch removes all the HAVE_ASM_GLOBAL_DOT_NAME definition and
checks for powerpc64 port.
Mike Frysinger [Wed, 11 Mar 2015 07:33:07 +0000 (03:33 -0400)]
hppa: update __O_SYNC fix with [BZ #18068]
Carlos O'Donell [Wed, 11 Mar 2015 06:42:27 +0000 (02:42 -0400)]
hppa: Fix feupdateenv and fesetexceptflag (Bug 18111).
The function feupdateenv has been fixed to correctly handle FE_DFL_ENV
and FE_NOMASK_ENV.
The fesetexceptflag function has been fixed to correctly handle setting
the new flags instead of just OR-ing the existing flags.
This fixes the test-fenv-return and test-fenvinline failures on hppa.
John David Anglin [Wed, 11 Mar 2015 03:43:50 +0000 (23:43 -0400)]
hppa: Fix feholdexcpt and fesetenv (Bug 18110).
The constraints in the inline assembly in feholdexcept and fesetenv
are incorrect. The assembly modifies the buffer pointer, but doesn't
express that in the constraints. The simple fix is to remove the
modification of the buffer pointer which is no longer required by
the existing code, and adjust the one constraint that did express
the modification of bufptr.
The change fixes test-fenv when glibc is compiled with recent gcc.
Joseph Myers [Wed, 11 Mar 2015 01:14:15 +0000 (01:14 +0000)]
soft-fp: Add _FP_UNREACHABLE.
This patch makes soft-fp use a new macro _FP_UNREACHABLE in place of
calling abort in unreachable default cases of switch statements.
_FP_UNREACHABLE expands to call __builtin_unreachable for GCC 4.5 and
later; the fallback to abort is thus only for kernel use.
Tested for powerpc-nofpu that installed stripped shared libraries are
unchanged by this patch. Also tested with the math/ tests for mips64
(in the case of fma there *was* previously an abort call generated,
unlike for the other operations - one switch only deals with a subset
of classes for one operand based on what could have been generated in
the earlier part of fma, whereas the other switches deal with all
combinations of two classes - and this is apparently too complicated
for the default case to have been optimized away).
* soft-fp/soft-fp.h (_FP_UNREACHABLE): New macro.
* soft-fp/op-common.h (_FP_MUL): Use _FP_UNREACHABLE instead of
abort.
(_FP_FMA): Likewise.
(_FP_DIV): Likewise.
Roland McGrath [Tue, 10 Mar 2015 22:13:14 +0000 (15:13 -0700)]
Let tests result in UNSUPPORTED; use that for unbuildable C++ cases
Roland McGrath [Tue, 10 Mar 2015 20:53:34 +0000 (13:53 -0700)]
Harmonize posix/regcomp.c with gnulib: comment formatting
Carlos O'Donell [Tue, 10 Mar 2015 20:09:37 +0000 (16:09 -0400)]
hppa: Update libm-test-ulps.
Joseph Myers [Tue, 10 Mar 2015 17:53:40 +0000 (17:53 +0000)]
Add test for bug 18104.
[BZ #18104]
* math/auto-libm-test-in: Add another test of pow.
* math/auto-libm-test-out: Regenerated.
Adhemerval Zanella [Tue, 10 Mar 2015 13:38:54 +0000 (09:38 -0400)]
powerpc: Fix incorrect results for pow when using FMA
This patch adds no FMA generation for e_pow to avoid precision issues
for powerpc. This fixes BZ#18104.
Joseph Myers [Tue, 10 Mar 2015 00:32:29 +0000 (00:32 +0000)]
soft-fp: Use multiple-include guards.
This patch makes soft-fp headers consistently use multiple-include
guards, something previously done mainly only in the Linux kernel
version. The guard macros aren't the same as those used in the Linux
kernel, but there seems to be enough variation in such guards in Linux
kernel code that hopefully this version will be acceptable there.
Tested for powerpc-nofpu that installed stripped shared libraries are
unchanged by this patch.
* soft-fp/double.h [SOFT_FP_DOUBLE_H]: New multiple-include guard.
* soft-fp/extended.h [SOFT_FP_EXTENDED_H]: Likewise.
* soft-fp/op-1.h [SOFT_FP_OP_1_H]: Likewise.
* soft-fp/op-2.h [SOFT_FP_OP_2_H]: Likewise.
* soft-fp/op-4.h [SOFT_FP_OP_4_H]: Likewise.
* soft-fp/op-8.h [SOFT_FP_OP_8_H]: Likewise.
* soft-fp/op-common.h [SOFT_FP_OP_COMMON_H]: Likewise.
* soft-fp/quad.h [SOFT_FP_QUAD_H]: Likewise.
* soft-fp/single.h [SOFT_FP_SINGLE_H]: Likewise.
* soft-fp/soft-fp.h (SOFT_FP_H): Define to 1 rather than empty.
Add comment on closing #endif.
Paul Pluzhnikov [Mon, 9 Mar 2015 21:41:35 +0000 (14:41 -0700)]
Minor refactoring:
* posix/wordexp.c (CHAR_IN_SET): New macro.
(parse_param): Use it.
Adhemerval Zanella [Mon, 9 Mar 2015 17:26:48 +0000 (13:26 -0400)]
Update powerpc-fpu ULPs.
Paul Pluzhnikov [Mon, 9 Mar 2015 14:22:36 +0000 (07:22 -0700)]
Fix BZ #18043 (c4): buffer-overflow (read past the end) in wordexp/parse_dollars/parse_param
Paul Pluzhnikov [Mon, 9 Mar 2015 04:58:26 +0000 (21:58 -0700)]
Mention BZ #18042 in NEWS.
Paul Pluzhnikov [Mon, 9 Mar 2015 04:55:13 +0000 (21:55 -0700)]
Fix off-by-one which caused BZ #18042 and add a test for it.
Paul Pluzhnikov [Mon, 9 Mar 2015 04:37:31 +0000 (21:37 -0700)]
Refactor wordexp-test.c such that words always ends at the edge of
unreadable page.
This makes it easy to catch overflows, such as BZ #18043 (and BZ #18042).
Paul Pluzhnikov [Sun, 8 Mar 2015 16:46:53 +0000 (09:46 -0700)]
Cleanup: in preparation for fixing BZ #16734, fix memory leaks exposed by
switching fopen()ed streams from mmap to malloc.
Samuel Thibault [Sun, 8 Mar 2015 10:26:57 +0000 (11:26 +0100)]
hurd: Make libc able to call pthread stubs
* sysdeps/mach/hurd/bits/libc-lock.h [_LIBC]: Include
<bits/libc-lockP.h>
Joseph Myers [Sat, 7 Mar 2015 01:39:42 +0000 (01:39 +0000)]
soft-fp: Support conditional zero-initialization in declarations.
In the Linux kernel, some architectures have a single function that
uses different kinds of unpacking and packing depending on the
instruction being emulated, meaning it is not readily visible to the
compiler that variables from _FP_DECL and _FP_FRAC_DECL_* macros are
only used in cases where they were initialized. The existing copy of
soft-fp in the Linux kernel uses zero-initialization to avoid warnings
in this case, so while frowned upon as a warning suppression mechanism
in code built for glibc it seems appropriate to have such
zero-initialization conditional on __KERNEL__. This patch duly adds
it, via a macro _FP_ZERO_INIT that expands to empty for non-kernel
compilations.
Tested for powerpc-nofpu that installed stripped shared libraries are
unchanged by this patch.
* soft-fp/soft-fp.h (_FP_ZERO_INIT): New macro. Define depending
on [__KERNEL__].
* soft-fp/op-1.h (_FP_FRAC_DECL_1): Use _FP_ZERO_INIT.
* soft-fp/op-2.h (_FP_FRAC_DECL_2): Likewise.
* soft-fp/op-common.h (_FP_DECL): Likewise.
H.J. Lu [Fri, 6 Mar 2015 12:55:56 +0000 (04:55 -0800)]
Replace __attribute__((visibility("protected")))
With copy relocation, address of protected data defined in the shared
library may be external. Compiler shouldn't asssume protected data will
be local. But due to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65248
__attribute__((visibility("protected"))) doesn't work correctly, we need
to use asm (".protected xxx") instead.
* elf/ifuncdep2.c (global): Replace
__attribute__((visibility("protected"))) with
asm (".protected global").
* elf/ifuncmod1.c (global): Likewise.
* elf/ifuncmod5.c (global): Likewise.
Joseph Myers [Sat, 7 Mar 2015 00:59:56 +0000 (00:59 +0000)]
Fix /* in comment in previous commit.
Joseph Myers [Sat, 7 Mar 2015 00:36:02 +0000 (00:36 +0000)]
soft-fp: Condition sfp-machine.h include path on __KERNEL__.
My Linux kernel patch to update the kernel to current glibc soft-fp
<https://sourceware.org/ml/libc-alpha/2015-02/msg00107.html> still
leaves a few small differences between the two copies of soft-fp.
I think it's desirable to avoid such differences completely if
possible by having one set of sources suitable for use in both places.
To that end, this patch introduces a conditional on __KERNEL__ for the
path by which sfp-machine.h is included.
Tested for powerpc-nofpu that installed stripped shared libraries are
unchanged by this patch.
* soft-fp/soft-fp.h [!_LIBC && __KERNEL__]: Include
<asm/sfp-machine.h> instead of <sfp-machine.h>.
Roland McGrath [Fri, 6 Mar 2015 18:59:15 +0000 (10:59 -0800)]
Document test-wrapper-env-only in INSTALL.
Roland McGrath [Fri, 6 Mar 2015 18:52:53 +0000 (10:52 -0800)]
ChangeLog format
Paul Pluzhnikov [Fri, 6 Mar 2015 17:13:16 +0000 (09:13 -0800)]
Fix BZ #18043: buffer-overflow (read past the end) in wordexp/parse_dollars/parse_param
Vincent Bernat [Fri, 6 Mar 2015 11:01:52 +0000 (12:01 +0100)]
time: ensure failing strptime() tests are reported correctly
Samuel Thibault [Fri, 6 Mar 2015 10:32:24 +0000 (11:32 +0100)]
Fix aio_error thread-safety.
* sysdeps/pthread/aio_error.c: New file
* sysdeps/pthread/aio_misc.c: Remove optimistic comment about
synchronization.
Florian Weimer [Sun, 1 Mar 2015 20:52:15 +0000 (21:52 +0100)]
vfprintf: Define WORK_BUFFER_SIZE
This constant will allow us to refer to the number of elements in
work_buffer across a function call boundary.
Florian Weimer [Sun, 1 Mar 2015 20:47:31 +0000 (21:47 +0100)]
vfprintf: Introduce JUMP_TABLE_BASE_LABEL
This makes the offset handling more explicit and avoids
cross-references between the jump tables.
Florian Weimer [Fri, 6 Mar 2015 09:26:58 +0000 (10:26 +0100)]
vfprintf: Introduce THOUSANDS_SEP_T
This avoids preprocessor conditionals in function declarations.
Rical Jasan [Fri, 6 Mar 2015 05:59:49 +0000 (00:59 -0500)]
manual: complete example in error message documentation
The manual gives "an example showing how to handle failure to open a
file correctly." The example function, open_sesame, uses the
newly-introduced strerror function and errno and
program_invocation_short_name variables. It fails to specify GNU
extensions, however, so attempts to use it in the following way:
int main (void) {open_sesame ("badname");}
fail during compilation with "error: ‘program_invocation_short_name’
undeclared", indicating the example is incomplete. The presence of
"#include"s suggest everything neccesary for the function to work should
be present. For completeness, the example is lacking the following line:
#define _GNU_SOURCE
as the declarations of program_invocation_*name in errno.h are wrapped
in an "#ifdef __USE_GNU" conditional.
The documentation of the variables is also expanded, adding that their
definition lies in errno.h and noting specifically they are GNU
extensions.
Mike Frysinger [Thu, 5 Mar 2015 19:09:50 +0000 (14:09 -0500)]
manual: drop strerror C89 compatibility note
Mentioning systems that are old and don't support C89 is probably
a waste of time nowadays. Drop the note.
Roland McGrath [Thu, 5 Mar 2015 20:58:49 +0000 (12:58 -0800)]
Avoid re-exec-self in bug-setlocale1.
H.J. Lu [Thu, 5 Mar 2015 16:26:21 +0000 (08:26 -0800)]
Replace ELF_RTYPE_CLASS_NOCOPY with ELF_RTYPE_CLASS_COPY
ELF_RTYPE_CLASS_NOCOPY in comments is a typo. It should be
ELF_RTYPE_CLASS_COPY.
[BZ #18082]
* sysdeps/alpha/dl-machine.h (elf_machine_type_class): Replace
ELF_RTYPE_CLASS_NOCOPY with ELF_RTYPE_CLASS_COPY in comments.
* sysdeps/arm/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/hppa/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/i386/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/ia64/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/m68k/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/microblaze/dl-machine.h (elf_machine_type_class):
Likewise.
* sysdeps/nios2/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_type_class):
Likewise.
* sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_type_class):
Likewise.
* sysdeps/s390/s390-32/dl-machine.h (elf_machine_type_class):
Likewise.
* sysdeps/s390/s390-64/dl-machine.h (elf_machine_type_class):
Likewise.
* sysdeps/sh/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_type_class):
Likewise.
* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_type_class):
Likewise.
* sysdeps/tile/dl-machine.h (elf_machine_type_class): Likewise.
* sysdeps/x86_64/dl-machine.h (elf_machine_type_class): Likewise.
Roland McGrath [Thu, 5 Mar 2015 00:11:31 +0000 (16:11 -0800)]
Define ETH_ALEN in generic <netinet/if_ether.h>.
Roland McGrath [Wed, 4 Mar 2015 23:55:38 +0000 (15:55 -0800)]
Split rpcent tests out of tst-netdb.
Roland McGrath [Wed, 4 Mar 2015 23:14:56 +0000 (15:14 -0800)]
Conditionalize some test code for SIGRTMIN, SA_SIGINFO.
Roland McGrath [Wed, 4 Mar 2015 22:11:39 +0000 (14:11 -0800)]
Avoid more C++ tests.