Will Hawkins [Fri, 20 Oct 2017 05:25:26 +0000 (22:25 -0700)]
resolv: Remove bogus targets that build ga_test
Remove the bogus targets (and source) that supposedly build ga_test.
This code was added to resolv very early in the development process
but does not appear to be an actual test program. The target for
building this file is tests but because the glibc Make system is
built the way it is, the target is overriden by higher-level tests
targets and, therefore, the ga_test program is never built. Removing
the target and the source code makes the resolv/Makefile less confusing.
Tested by building and running 'make check' on 64 bit host running
Kernel 4.10.0-19 configured with
--prefix=/home/hawkinsw/code/glibc-build/install
--enable-hardcoded-path-in-tests
--disable-mathvec
Florian Weimer [Fri, 20 Oct 2017 02:10:15 +0000 (04:10 +0200)]
sysconf: Fix missing definition of UIO_MAXIOV on Linux [BZ #22321]
After commit 37f802f86400684c8d13403958b2c598721d6360 (Remove
__need_IOV_MAX and __need_FOPEN_MAX), UIO_MAXIOV is no longer supplied
(indirectly) through <bits/stdio_lim.h>, so sysdeps/posix/sysconf.c no
longer sees the definition.
Joseph Myers [Thu, 19 Oct 2017 17:59:41 +0000 (17:59 +0000)]
Add MIPS bits/floatn.h.
This patch adds a MIPS-specific bits/floatn.h header. This header is
identical to the ldbl-128 version except for the comment at the top;
the purpose is to ensure that a 32-bit MIPS build installs a header
that is the same as in a 64-bit MIPS build and so properly shows
_Float128 support to be available for 64-bit compilations, on the
general principle of an installation for one multilib providing
headers also suitable for other multilibs.
Joseph Myers [Thu, 19 Oct 2017 17:32:20 +0000 (17:32 +0000)]
Install correct bits/long-double.h for MIPS64 (bug 22322).
Similar to bug 21987 for SPARC, MIPS64 wrongly installs the ldbl-128
version of bits/long-double.h, meaning incorrect results when using
headers installed from a 64-bit installation for a 32-bit build. (I
haven't actually seen this cause build failures before its interaction
with bits/floatn.h did so - installed headers wrongly expecting
_Float128 to be available in a 32-bit configuration.)
This patch fixes the bug by moving the MIPS header to
sysdeps/mips/ieee754, which comes before sysdeps/ieee754/ldbl-128 in
the sysdeps directory ordering. (bits/floatn.h will need a similar
fix - duplicating the ldbl-128 version for MIPS will suffice - for
headers from a 32-bit installation to be correct for 64-bit builds.)
Tested with build-many-glibcs.py (compilers build for
mips64-linux-gnu, where there was previously a libstdc++ build failure
as at
<https://sourceware.org/ml/libc-testresults/2017-q4/msg00130.html>).
Wilco Dijkstra [Thu, 19 Oct 2017 17:19:55 +0000 (18:19 +0100)]
Fix deadlock in _int_free consistency check
This patch fixes a deadlock in the fastbin consistency check.
If we fail the fast check due to concurrent modifications to
the next chunk or system_mem, we should not lock if we already
have the arena lock. Simplify the check to make it obviously
correct.
* malloc/malloc.c (_int_free): Fix deadlock bug in consistency check.
Joseph Myers [Wed, 18 Oct 2017 17:37:18 +0000 (17:37 +0000)]
Add _Float128 function aliases.
This patch adds support for *f128 function aliases on platforms where
long double has the binary128 format (and thus GCC 7 provides the
_Float128 type with the same ABI as long double but as a distinct type
in terms of C type compatibility). This is the same API as provided
in glibc 2.26 for powerpc64le / x86_64 / x86 / ia64 where _Float128
has a different format from long double, with the bulk of the API
coming from TS 18661-3. All the functions alias the corresponding
long double functions, and __* function names are not provided since
those are only needed once for each floating-point format, not more
than once for different types with the same format (so for example,
-ffinite-math-only maps foof128 to __fool_finite, while type-generic
macros end up calling e.g. __issignalingl for _Float128 arguments on
such platforms).
The preparation for this feature was done in previous patches, so this
one just needs to add the relevant makefile and header definitions,
and update macro definitions of libm_alias_ldouble_other_r, to turn on
the feature, and update documentation and ABI baselines.
Tested (a) for x86_64, (b) for aarch64, (c) with build-many-glibcs.py
with both GCC 6 and GCC 7.
Szabolcs Nagy [Wed, 18 Oct 2017 16:26:23 +0000 (17:26 +0100)]
[AARCH64] Rewrite elf_machine_load_address using _DYNAMIC symbol
This patch rewrites aarch64 elf_machine_load_address to use special _DYNAMIC
symbol instead of _dl_start.
The static address of _DYNAMIC symbol is stored in the first GOT entry.
Here is the change which makes this solution work (part of binutils 2.24):
https://sourceware.org/ml/binutils/2013-06/msg00248.html
i386, x86_64 targets use the same method to do this as well.
The original implementation relies on a trick that R_AARCH64_ABS32 relocation
being resolved at link time and the static address fits in the 32bits.
However, in LP64, normally, the address is defined to be 64 bit.
Here is the C version one which should be portable in all cases.
* sysdeps/aarch64/dl-machine.h (elf_machine_load_address): Use
_DYNAMIC symbol to calculate load address.
In the powerpc implementation of SET_RESTORE_ROUND, there is the
following code in the "SET" function (slightly simplified):
--
old.fenv = fegetenv_register ();
new.l = (old.l & _FPU_MASK_TRAPS_RN) | r; (1)
if (new.l != old.l) (2)
{
if ((old.l & _FPU_ALL_TRAPS) != 0)
(void) __fe_mask_env ();
fesetenv_register (new.fenv); (3)
--
Line (1) sets the value of "new" to the current value of FPSCR,
but masks off summary bits, exceptions, non-IEEE mode, and
rounding mode, then ORs in the new rounding mode.
Line (2) compares this new value to the current value in order to
avoid setting a new value in the FPSCR (line (3)) unless something
significant has changed (exception enables or rounding mode).
The summary bits are not germane to the comparison, but are cleared
in "new" and preserved in "old", resulting in false negative
comparisons, and unnecessarily setting the FPSCR in those cases
with associated negative performance impacts.
The solution is to treat the summaries identically for "new" and "old":
- save them in SET
- leave them alone otherwise
- restore the saved values in RESTORE
Also minor changes:
- expand _FPU_MASK_RN to 64bit hex, to match other MASKs
- treat bit 52 (left-to-right) as reserved (since it is)
* sysdeps/powerpc/fpu/fenv_private.h (_FPU_MASK_TRAPS_RN):
(_FPU_MASK_FRAC_INEX_RET_CC): Fix masks to more properly handle
summary bits.
(_FPU_MASK_RN): Expand _FPU_MASK_RN to 64bit hex.
(_FPU_MASK_NOT_RN_NI): Treat bit 52 (left-to-right) as reserved.
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
Mike FABIAN [Wed, 18 Oct 2017 12:27:44 +0000 (14:27 +0200)]
Use U+202F NARROW NO-BREAK SPACE as thousands separators in pl_PL locale [BZ #16777]
[BZ #16777]
* localedata/locales/pl_PL (LC_MONETARY): Use U+202F as mon_thousands_sep
and improve readability by using more ASCII.
* localedata/locales/pl_PL (LC_NUMERIC): Use U+202F as thousands_sep
and improve readability by using more ASCII.
Joseph Myers [Tue, 17 Oct 2017 20:16:01 +0000 (20:16 +0000)]
Use __f128 to define FLT128_* constants in include/float.h for old GCC.
When using compilers before GCC 7, include/float.h provides fallback
definitions of FLT128_* constants. These definitions use 'Q' constant
suffixes, which works for configurations with _Float128 ABI-distinct
from long double, but not where it has the same ABI as long double.
This patch changes the definitions to use the __f128 macro from
<bits/floatn.h>, so allowing them to work in the non-distinct
_Float128 case (where they are used in building glibc tests, not for
building glibc itself) as well.
Tested (a) with build-many-glibcs.py with GCC 6 (installed stripped
shared libraries unchanged by the patch); (b) with
build-many-glibcs.py with GCC 6 together with the main patch to enable
float128 aliases; (c) for x86_64 with both GCC 6 and GCC 7.
Wilco Dijkstra [Tue, 17 Oct 2017 17:55:16 +0000 (18:55 +0100)]
Improve malloc initialization sequence
The current malloc initialization is quite convoluted. Instead of
sometimes calling malloc_consolidate from ptmalloc_init, call
malloc_init_state early so that the main_arena is always initialized.
The special initialization can now be removed from malloc_consolidate.
This also fixes BZ #22159.
Check all calls to malloc_consolidate and remove calls that are
redundant initialization after ptmalloc_init, like in int_mallinfo
and __libc_mallopt (but keep the latter as consolidation is required for
set_max_fast). Update comments to improve clarity.
Remove impossible initialization check from _int_malloc, fix assert
in do_check_malloc_state to ensure arena->top != 0. Fix the obvious bugs
in do_check_free_chunk and do_check_remalloced_chunk to enable single
threaded malloc debugging (do_check_malloc_state is not thread safe!).
Wilco Dijkstra [Tue, 17 Oct 2017 17:43:31 +0000 (18:43 +0100)]
Use relaxed atomics for malloc have_fastchunks
Currently free typically uses 2 atomic operations per call. The have_fastchunks
flag indicates whether there are recently freed blocks in the fastbins. This
is purely an optimization to avoid calling malloc_consolidate too often and
avoiding the overhead of walking all fast bins even if all are empty during a
sequence of allocations. However using catomic_or to update the flag is
completely unnecessary since it can be changed into a simple boolean and
accessed using relaxed atomics. There is no change in multi-threaded behaviour
given the flag is already approximate (it may be set when there are no blocks in
any fast bins, or it may be clear when there are free blocks that could be
consolidated).
Performance of malloc/free improves by 27% on a simple benchmark on AArch64
(both single and multithreaded). The number of load/store exclusive instructions
is reduced by 33%. Bench-malloc-thread speeds up by ~3% in all cases.
Wilco Dijkstra [Tue, 17 Oct 2017 17:25:43 +0000 (18:25 +0100)]
Inline tcache functions
The functions tcache_get and tcache_put show up in profiles as they
are a critical part of the tcache code. Inline them to give tcache
a 16% performance gain. Since this improves multi-threaded cases
as well, it helps offset any potential performance loss due to adding
single-threaded fast paths.
Aurelien Jarno [Thu, 30 Jun 2016 10:57:32 +0000 (12:57 +0200)]
New locale ca_ES@valencia [BZ #2522]
The Valencian (meridional Catalan) locale is basically a copy of the
Catalan locale. The point of having a separate locale is only for PO
translations. This locale is already provided by several distributions
and is already supported by various projects like LibreOffice, Mozilla,
Gnome, KDE.
Romain Naour [Mon, 16 Oct 2017 21:21:56 +0000 (23:21 +0200)]
Let signbit use the builtin in C++ mode with gcc < 6.x (bug 22296)
When using gcc < 6.x, signbit does not use the type-generic
__builtin_signbit builtin, instead it uses __MATH_TG.
However, when library support for float128 is available, __MATH_TG uses
__builtin_types_compatible_p, which is not available in C++ mode.
On the other hand, libstdc++ undefines (in cmath) many macros from
math.h, including signbit, so that it can provide its own functions.
However, during its configure tests, libstdc++ just tests for the
availability of the macros (it does not undefine them, nor does it
provide its own functions).
Finally, libstdc++ configure tests include math.h and get the definition
of signbit that uses __MATH_TG (and __builtin_types_compatible_p).
Since libstdc++ does not undefine the macros during its configure
tests, they fail.
This patch lets signbit use the builtin in C++ mode when gcc < 6.x is
used. This allows the configure test in libstdc++ to work.
Tested for x86_64.
[BZ #22296]
* math/math.h: Let signbit use the builtin in C++ mode with gcc
< 6.x
Cc: Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> Cc: Joseph Myers <joseph@codesourcery.com>
Mike FABIAN [Tue, 17 Oct 2017 12:54:53 +0000 (14:54 +0200)]
Place monetary symbol in el_GR and el_CY after the amount
CLDR uses this pattern as well.
[BZ #22019]
* localedata/locales/el_GR: Set n_cs_precedes to 0.
* localedata/locales/el_CY: copy "el_GR" because it is identical.
* stdlib/tst-strfmon_l.c: adapt test case.
Joseph Myers [Mon, 16 Oct 2017 22:04:42 +0000 (22:04 +0000)]
Move some float128 symbol version definitions.
With support for _Float128 functions on platforms where that type has
the same ABI as long double, as well as on platforms where it is
ABI-distinct, those functions will need to be exported from glibc's
shared libraries at appropriate symbol versions in each case.
This patch avoids duplication of lists of symbols to export by moving
the symbols other than __* to math/Versions and stdlib/Versions.
There, they are conditional on <float128-abi.h> defining
FLOAT128_VERSION and a default version of that header is added that
does not define that macro. Enabling the float128 function aliases
will then include adding a sysdeps/ieee754/ldbl-128/float128-abi.h
that defines FLOAT128_VERSION to GLIBC_2.27. Symbols __* remain in
sysdeps/ieee754/float128/Versions; those symbols should be present
only once per floating-point format, not once per type.
Note that if any platforms currently lacking support for a type with
binary128 format get glibc support for such a type in future (whether
only as _Float128, or also as a new long double format), and new libm
functions (present for all types) have been added by then, additional
macros will be needed to allow such functions to get a version of the
form "GLIBC_2.28 if the platform had _Float128 support by then, or the
later version at which that platform had _Float128 support added".
This is not however a preexisting condition, but would have applied
equally to the existing support for _Float128 as an ABI-distinct
type. New all-type libm functions should just be added to the
appropriate symbol version (currently GLIBC_2.27) for all types, with
such special-case handling for _Float128 versions (and _Float64x as
well in future) waiting until someone actually wants to add support
for _Float128 to an existing platform after a release in which that
platform and a post-2.26 libm function had support but that platform
lacked _Float128 support.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch. Also tested in conjunction
with the remaining changes to enable float128 aliases.
* sysdeps/generic/float128-abi.h: New file.
* sysdeps/ieee754/float128/Versions (FLOAT128_VERSION): Move
non-__prefixed symbols to ....
* math/Versions: ... here. Include <float128-abi.h>.
* stdlib/Versions ... and here. Include <float128-abi.h>
Florian Weimer [Mon, 16 Oct 2017 18:52:34 +0000 (20:52 +0200)]
malloc: Use compat_symbol_reference in libmcheck [BZ #22050]
Since glibc 2.24, __malloc_initialize_hook is a compat symbol. As a
result, the link editor does not export a definition of
__malloc_initialize_hook from the main program, so that it no longer
interposes the variable definition in libc.so. Specifying the symbol
version restores the exported symbol.
Joseph Myers [Mon, 16 Oct 2017 13:28:30 +0000 (13:28 +0000)]
Support running libm tests for float128 as alias for long double.
This patch adds support for running libm tests for float128 in the
case where the float128 functions are aliases of long double
functions. In this case, the sysdeps Makeconfig file
(i.e. sysdeps/ieee754/ldbl-128/Makeconfig) will need to define
"float128-alias-fcts = yes" to enable the tests.
Tested for x86_64. Also tested with build-many-glibcs.py; installed
stripped shared libraries are unchanged by the patch. Also tested
together with changes to enable the float128 aliases.
Joseph Myers [Mon, 16 Oct 2017 13:22:11 +0000 (13:22 +0000)]
Support strtof128 etc. aliases.
This patch adds support for building strtof128, wcstof128, strtof128_l
and wcstof128_l as aliases, in the case of __HAVE_FLOAT128 &&
!__HAVE_DISTINCT_FLOAT128.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch. Also tested together with
changes to enable float128 aliases.
* stdlib/strtold.c: Include <bits/floatn.h>
[__HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128] (strtof128): Define
and later undefine as macro. Define as weak alias if
[!USE_WIDE_CHAR].
[__HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128] (wcstof128): Define
and later undefine as macro. Define as weak alias if
[USE_WIDE_CHAR].
* sysdeps/ieee754/ldbl-128/strtold_l.c [__HAVE_FLOAT128 &&
!__HAVE_DISTINCT_FLOAT128] (strtof128_l): Define and later
undefine as macro. Define as weak alias if [!USE_WIDE_CHAR].
[__HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128] (wcstof128_l):
Define and later undefine as macro. Define as weak alias if
[USE_WIDE_CHAR].
* sysdeps/ieee754/ldbl-64-128/strtold_l.c: Include
<bits/floatn.h>.
[__HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128] (strtof128_l):
Define and later undefine as macro. Define as weak alias if
[!USE_WIDE_CHAR].
[__HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128] (wcstof128_l):
Define and later undefine as macro. Define as weak alias if
[USE_WIDE_CHAR].
Carlos O'Donell [Sat, 14 Oct 2017 22:38:05 +0000 (15:38 -0700)]
locale: Don't use \n with record_verbose messages.
Recorded verbose messages no longer need to pass \n in their
message string since the record_verbose function adds \n to
the messages (like error and warnings do also). The avoids
seeing a double \n for verbose messages.
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
hooks.c: In function ‘realloc_check’:
hooks.c:352:14: error: ‘magic_p’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
*magic_p ^= 0xFF;
Carlos O'Donell [Fri, 13 Oct 2017 21:36:23 +0000 (14:36 -0700)]
locale: No warning for non-symbolic character (bug 22295)
In "Is it OK to write ASCII strings directly into locale source files?"
https://sourceware.org/ml/libc-alpha/2017-07/msg00807.html there is
universal consensus that we do not have to keep writing <Uxxxx> symbolic
characters in locale files.
Ulrich Drepper's historical comment was that symbolic characters were
used for the eventuality of converting the source files to any encoding
system. Fast forward to today and UTF-8 is the standard. So the
requirement of <Uxxxx> is hard to justify.
Zack Weinberg's excellent scripts are coming along we can use these to
find instances of human errors in the scripts:
https://sourceware.org/ml/libc-alpha/2017-07/msg00860.html
https://sourceware.org/ml/libc-alpha/2017-08/msg00136.html
It still won't be easy to distinguish from i for Ã, but that's still the
case for <Uxxxx> characters which humans can't read either.
Since we all agreed that we should be able to use non-symbolic (<Uxxxx>)
characters in locale files, the following change removes the verbose
warning that is raised if you use non-symbolic characters in the locale
file.
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
Carlos O'Donell [Fri, 13 Oct 2017 21:33:09 +0000 (14:33 -0700)]
locale: Allow "" int_curr_Symbol (bug 22294)
The builtin POSIX locale has "" as the international currency symbol,
but a non-builtin locale may not have such a blank int_curr_symbol.
Therefore to support non-builtin locales with similar "" int_curr_symbol
we adjust the LC_MONETARY parser to allow the normal 4-character
int_curr_symbol *and* the empty "" no symbol. Anything else remains
invalid.
Tested by building all the locales. Tested also with a custom C.UTF-8
locale with "" for int_curr_symbol.
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
Carlos O'Donell [Fri, 13 Oct 2017 16:54:03 +0000 (09:54 -0700)]
locale: Fix localedef exit code (Bug 22292)
The error and warning handling in localedef, locale, and iconv
is a bit of a mess.
We use ugly constructs like this:
WITH_CUR_LOCALE (error (1, errno, gettext ("\
cannot read character map directory `%s'"), directory));
to issue errors, and read error_message_count directly from the
error API to detect errors. The problem with that is that the
code also uses error to print warnings, and informative messages.
All of this leads to problems where just having warnings will
produce an exit status as-if errors had been seen.
To fix this situation I have adopted the following high-level
changes:
* All errors are counted distinctly.
* All warnings are counted distinctly.
* All informative messages are not counted.
* Increasing verbosity cannot generate *more* errors, and
it previously did for errors conditional on verbose,
this is now fixed.
* Increasing verbosity *can* generate *more* warnings.
* Making the output quiet cannot generate *fewer* errors,
and it previously did for errors conditional on be_quiet,
this is now fixed.
* Each of error, warning, and informative message has it's
own function to call defined in record-status.h, and they
are: record_error, record_warning, and record_verbose.
* The record_error function always records an error, but
conditional on be_quiet may not print it.
* The record_warning function always records a warning,
but conditional on be_quiet may not print it.
* The record_verbose function only prints the verbose
message if verbose is true and be_quiet is false.
This has allowed the following fix:
* Previously any warnings were being treated as errors
because they incremented error_message_count, but now
we properly return an exit status of 1 if there are
warnings but output was generated.
All of this allows localedef to correctly decide if errors,
or warnings were present, and produce the correct exit code.
The locale and iconv programs now also use record-status.h
and we have removed the WITH_CUR_LOCALE hack, and instead
have internal push_locale/pop_locale functions centralized
in the record routines.
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
* Move non-transliteration Unicode generated data to i18n_ctype.
* Copy the i18n_ctype data into i18n and add transliteration.
In the future, any locale which needs Unicode LC_CTYPE data can
also just use `copy i18n_ctype` and get the base character classes
and maps without transliteration.
Tested by compiling all the locales and my prototype C.UTF-8 which
uses it.
Signed-off-by: Carlos O'Donell <carlos@redhat.com>
Joseph Myers [Fri, 13 Oct 2017 23:09:48 +0000 (23:09 +0000)]
Support strfromf128 alias.
This patch adds support for building strfromf128 as an alias of
strfroml, in the case of __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch. Also tested together with
changes to enable float128 aliases.
* stdlib/strfroml.c: Include <bits/floatn.h>.
[__HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128] (strfromf128):
Define before include of <stdlib.h> and undefine afterwards, then
define as weak alias.
Joseph Myers [Fri, 13 Oct 2017 23:05:15 +0000 (23:05 +0000)]
Use libm_alias_ldouble_other in ldbl-64-128/s_nextafterl.c.
This patch makes ldbl-64-128/s_nextafterl.c restore the default
weak_alias definition and use libm_alias_ldouble_other (having
undefined and redefined weak_alias for the include of
ldbl-128/s_nextafterl.c, so the libm_alias_ldouble use in the latter
file is ineffective).
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch. Also tested together with
changes to enable float128 aliases.
* sysdeps/ieee754/ldbl-64-128/s_nextafterl.c (weak_alias):
Undefine and restore default definition. Use
libm_alias_ldouble_other.
James Clarke [Fri, 13 Oct 2017 18:44:39 +0000 (15:44 -0300)]
Fix TLS relocations against local symbols on powerpc32, sparc32 and sparc64
Normally, TLS relocations against local symbols are optimised by the linker
to be absolute. However, gold does not do this, and so it is possible to
end up with, for example, R_SPARC_TLS_DTPMOD64 referring to a local symbol.
Since sym_map is left as null in elf_machine_rela for the special local
symbol case, the relocation handling thinks it has nothing to do, and so
the module gets left as 0. Havoc then ensues when the variable in question
is accessed.
Before this fix, the main_local_gold program would receive a SIGBUS on
sparc64, and SIGSEGV on powerpc32. With this fix applied, that test now
passes like the rest of them.
* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela):
Assign sym_map to be map for local symbols, as TLS relocations
use sym_map to determine whether the symbol is defined and to
extract the TLS information.
* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela): Likewise.
* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Likewise.
[BZ #22142] powerpc: Fix the carry bit on mpn_[add|sub]_n on POWER7
Fix the ifdef clause that was being used in the opposite way, setting
a wrong value of the carry bit.
This is also correcting 2 memory accesses that were mistakenly referring
to r0 while they were supposed to mean the immediate value 0.
[BZ #22142]
* stdio-common/tst-printf.c (fp_test): Add tests for DBL_MAX and
-DBL_MAX.
(do_test): Likewise.
* stdio-common/tst-printf.sh: Likewise.
* sysdeps/powerpc/powerpc64/power7/add_n.S: Invert the initial
ifdef clause in order to set the carry bit right. Replace r0 by
0 without changing the behavior.
Joseph Myers [Fri, 13 Oct 2017 16:43:18 +0000 (16:43 +0000)]
Use libm_alias_ldouble for SPARC fabsl.
This patch makes SPARC fabsl implementation use libm_alias_ldouble, to
prepare them for also defining _Float128 function aliases.
Tested with build-many-glibcs.py that installed stripped shared
libraries (sparc64-linux-gnu and sparcv9-linux-gnu) are unchanged by
the patch.
* sysdeps/sparc/sparc32/fpu/s_fabsl.c: Include
<libm-alias-ldouble.h>.
(fabsl): Define using libm_alias_ldouble.
* sysdeps/sparc/sparc64/fpu/s_fabsl.c: Include
<libm-alias-ldouble.h>.
(fabsl): Define using libm_alias_ldouble.
Testing with changes to enable _Float128 function aliases shows that
the libm_alias_ldouble_other usage in ldbl-opt/w_lgamma_compatl.c does
not in fact work. Furthermore, it is unnecessary; the relevant
aliases get created through w_lgammal_compat2.c. This patch removes
the problem code.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by the patch. Also tested in conjunction with
patches to enable _Float128 function aliases.
Testing with changes to enable _Float128 function aliases shows that
the libm_alias_ldouble_other usage in ldbl-opt/s_clog10l.c does not in
fact work, because __clog10l is defined with long_double_symbol rather
than as a normal C alias. This patch fixes this by renaming the
__clog10l__internal alias (not strictly necessary, but avoids a hack
with "__clog10l_interna" / "__clog10l__interna" as first argument to
libm_alias_ldouble_other) and using the renamed alias when calling
libm_alias_ldouble_other.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanges by the patch. Also tested in conjunction with
patches to enable _Float128 function aliases.
* sysdeps/ieee754/ldbl-opt/s_clog10l.c (__clog10l__internal):
Rename to __clog10_internal_l.
(__clog10_internal_l): Define aliases using
libm_alias_ldouble_other instead of using libm_alias_ldouble_other
with __clog10.
Joseph Myers [Wed, 11 Oct 2017 17:46:19 +0000 (17:46 +0000)]
Run libm long double tests for long double = double.
All interfaces in the glibc API ought to be covered by the testsuite,
even where they alias other interfaces. This patch arranges for libm
tests to be run for long double when it aliases double; previously
those tests were run only for the floating-point types with distinct
formats. The long double tests are made to use the double ulps values
in this case, as having a separate duplicate set of ulps for them
seems unnecessary; to accommodate that, the test-<type>.h headers now
specify the macro indexing into the ulps array explicitly instead of
having it computed from PREFIX.
Nothing special is done about vector function tests. None are
supported for any long double = double platforms, and supporting
vector functions for a type alias such as _Float32 would not simply
fall out of adding the scalar aliases for that type - it would require
vector function wrappers like those for *_finite (or, better, a new
GCC feature to allow specifying the asm name for vector functions
independently of that for scalar ones, as previously discussed), so it
seems reasonable to require the sysdeps makefile setting of
libmvec-tests to be updated if any such tests are to be run for type
aliases.
Tested for x86_64 and arm.
* math/Makefile (test-types-basic): New variable.
(test-types): Likewise.
(libm-test-support): Use $(test-types) instead of $(types).
(libm-tests-base-normal): Likewise.
(libm-tests-base-finite): Likewise.
(libm-tests-base-inline): Likewise.
(generated): Likewise.
($(objpfx)libm-test-support-$(t).c): Likewise.
(libm-tests-for-type iterator): Likewise.
(libm-test-support iterator): Likewise.
* math/libm-test-support.c (ulp_i_idx): Use ULP_I_IDX.
(ulp_idx): Use ULP_IDX.
* math/test-ldouble.h: Include <float.h>.
(TYPE_STR): Define conditional on [LDBL_MANT_DIG == DBL_MANT_DIG].
(ULP_IDX): New macro.
(ULP_I_IDX): Likewise.
* math/test-double.h (ULP_IDX): Likewise.
(ULP_I_IDX): Likewise.
* math/test-float.h (ULP_IDX): Likewise.
(ULP_I_IDX): Likewise.
* math/test-float128.h (ULP_IDX): Likewise.
(ULP_I_IDX): Likewise.
Current GLIBC has two ways to implement the single thread optimization
on syscalls to avoid calling the cancellation path: either by using
global variables (__{libc,pthread}_multiple_thread) or by accessing
the TCB field (defined by TLS_MULTIPLE_THREADS_IN_TCB). Both the
variables and the macros to acces its value are defined in the
architecture sysdep-cancel.h header.
This patch consolidates its definition on only one header,
sysdeps/unix/sysv/linux/sysdep-cancel.h, and adds a new define
(SINGLE_THREAD_BY_GLOBAL) which the architecture defines if it prefer
to use the global variables instead of the TCB field. This is an
optimization, so if the architecture does not define it, the TCB
method will be used as default.
Checked on x86_64-linux-gnu and on a build with major touched
ABIs (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabihf,
hppa-linux-gnu, i686-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu,
mips-linux-gnu, mips64-linux-gnu, powerpc-linux-gnu,
powerpc64le-linux-gnu, s390-linux-gnu, s390x-linux-gnu, sh4-linux-gnu,
sparcv9-linux-gnu, sparc64-linux-gnu, tilegx-linux-gnu).
Joseph Myers [Wed, 11 Oct 2017 02:51:39 +0000 (02:51 +0000)]
Use generic alias macros in ldbl-opt.
This patch fixes ldbl-opt code to use generic libm alias macros in
preparation for getting _FloatN / _FloatNx aliases where appropriate.
Four functions are affected, that undefine and redefine alias macros
before including the implementations they wrap in such a way that
_FloatN / _FloatNx aliases would not appear. s_clog10l.c undefines
and redefined declare_mgen_alias, so just needs a
libm_alias_ldouble_other call added. w_exp10l_compat.c undefines and
redefines weak_alias, but in fact does not need to do so, since
math/w_exp10l_compat.c uses libm_alias_ldouble and does not use
weak_alias other than through that, so the undefines and redefines of
weak_alias are removed. w_lgamma_compatl.c and w_remainderl_compat.c
are made to use libm_alias_ldouble_other in conjunction with restoring
the original definition of weak_alias so this is effective.
Tested with build-many-glibcs.py. Installed stripped shared libraries
are unchanged by this patch.
* sysdeps/ieee754/ldbl-opt/s_clog10l.c: Use
libm_alias_ldouble_other.
* sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c (weak_alias): Do not
undefine and redefine.
[LIBM_SVID_COMPAT && !LONG_DOUBLE_COMPAT (libm, GLIBC_2_1)]
(exp10l): Do not define here.
* sysdeps/ieee754/ldbl-opt/w_lgamma_compatl.c [BUILD_LGAMMA]
(weak_alias): Undefine and redefine.
[BUILD_LGAMMA]: Use libm_alias_ldouble_other.
* sysdeps/ieee754/ldbl-opt/w_remainderl_compat.c
[LIBM_SVID_COMPAT] (weak_alias): Undefine and redefine here.
[LIBM_SVID_COMPAT]: Use libm_alias_ldouble_other.
Joseph Myers [Wed, 11 Oct 2017 00:03:46 +0000 (00:03 +0000)]
Use libm_alias_* in soft-fp.
This patch makes the soft-fp implementations of fma functions use the
libm_alias_* macros.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by the patch.
* soft-fp/fmadf4.c: Include <libm-alias-double.h>.
[!__fma] (fma): Define using libm_alias_double.
* soft-fp/fmasf4.c: Include <libm-alias-float.h>.
[!__fmaf] (fmaf): Define using libm_alias_float.
* soft-fp/fmatf4.c: Include <libm-alias-ldouble.h>.
(fmal): Define using libm_alias_ldouble.
Joseph Myers [Tue, 10 Oct 2017 21:29:11 +0000 (21:29 +0000)]
Add libm_alias_*_other_r macros.
Some libm functions are unable to use the generic alias macros such as
libm_alias_double because they have special symbol versioning
requirements for the main float, double or long double public names.
To facilitate adding _FloatN / _FloatNx function aliases in future,
it's still desirable to have generic macros those functions can use as
far as possible. This patch adds macros such as
libm_alias_double_other, which only define names for _FloatN /
_FloatNx aliases, not for float / double / long double. As present,
all these new macros do nothing, but they are called in the
appropriate places in macros such as libm_alias_double. This patch
also arranges for lgamma implementations, and the recently added
optimized float function implementations, to use the new macros to
make them ready for addition of _FloatN / _FloatNx aliases.
Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by this patch.
* sysdeps/generic/libm-alias-double.h (libm_alias_double_other_r):
New macro.
(libm_alias_double_other): Likewise.
(libm_alias_double_r): Use libm_alias_double_other_r.
* sysdeps/generic/libm-alias-float.h (libm_alias_float_other_r):
New macro.
(libm_alias_float_other): Likewise.
(libm_alias_float_r): Use libm_alias_float_other_r.
* sysdeps/generic/libm-alias-float128.h
(libm_alias_float128_other_r): New macro.
(libm_alias_float128_other): Likewise.
(libm_alias_float128_r): Use libm_alias_float128_other_r.
* sysdeps/generic/libm-alias-ldouble.h
(libm_alias_ldouble_other_r): New macro.
(libm_alias_ldouble_other): Likewise.
(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
* sysdeps/ieee754/ldbl-opt/libm-alias-double.h
(libm_alias_double_other_r): New macro.
(libm_alias_double_other): Likewise.
(libm_alias_double_r): Use libm_alias_double_other_r.
* sysdeps/ieee754/ldbl-opt/libm-alias-ldouble.h
(libm_alias_ldouble_other_r): New macro.
(libm_alias_ldouble_other): Likewise.
(libm_alias_ldouble_r): Use libm_alias_ldouble_other_r.
* math/w_lgamma_main.c: Include <libm-alias-double.h>.
[!USE_AS_COMPAT]: Use libm_alias_double_other.
* math/w_lgammaf_main.c: Include <libm-alias-float.h>.
[!USE_AS_COMPAT]: Use libm_alias_float_other.
* math/w_lgammal_main.c: Include <libm-alias-ldouble.h>.
[!USE_AS_COMPAT]: Use libm_alias_ldouble_other.
* math/w_exp2f.c: Use libm_alias_float_other.
* math/w_expf.c: Likewise.
* math/w_log2f.c: Likewise.
* math/w_logf.c: Likewise.
* math/w_powf.c: Likewise.
* sysdeps/ieee754/flt-32/e_exp2f.c: Include <libm-alias-float.h>.
[!__exp2f]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_expf.c: Include <libm-alias-float.h>.
[!__expf]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_log2f.c: Include <libm-alias-float.h>.
[!__log2f]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_logf.c: Include <libm-alias-float.h>.
[!__logf]: Use libm_alias_float_other.
* sysdeps/ieee754/flt-32/e_powf.c: Include <libm-alias-float.h>.
[!__powf]: Use libm_alias_float_other.
Joseph Myers [Mon, 9 Oct 2017 22:04:18 +0000 (22:04 +0000)]
Use generic macros for lgamma_r function aliases.
Continuing the use of generic macros for defining libm function
aliases, in preparation for adding more _FloatN / _FloatNx function
names, this patch makes the lgamma_r functions use such macros.
declare_mgen_alias_r becomes a standard macro in math-type-macros.h
instead of being locally defined in w_lgamma_r_templace.c. This in
turn must be defined by each math-type-macros-<type>.h. Rather than
providing an unused default in math-type-macros.h, that header is made
to give an error if math-type-macros-<type>.h failed to define
declare_mgen_alias or declare_mgen_alias_r. The compat lgamma_r
wrappers are updated similarly. The ldbl-opt versions are removed as
no longer needed.
Tested for x86_64, and with build-many-glibcs.py. Installed stripped
shared libraries are unchanged except for powerpc64le (where the usual
issue applies that an ldbl-opt long double function previously used
long_double_symbol unconditionally and now the symbol versions on
powerpc64le mean weak_alias is used instead, resulting in the same
symbol versions in the final shared library but still enough
difference in the input objects for that library not to be
byte-identical).
* sysdeps/generic/math-type-macros.h [!declare_mgen_alias]: Give
error. Remove default definition of declare_mgen_alias.
[!declare_mgen_alias_r]: Likewise.
* sysdeps/generic/math-type-macros-double.h
[!declare_mgen_alias_r] (declare_mgen_alias_r): New macro.
* sysdeps/generic/math-type-macros-float.h [!declare_mgen_alias_r]
(declare_mgen_alias_r): Likewise.
* sysdeps/generic/math-type-macros-float128.h
[!declare_mgen_alias_r] (declare_mgen_alias_r): Likewise.
* sysdeps/generic/math-type-macros-ldouble.h
[!declare_mgen_alias_r] (declare_mgen_alias_r): Likewise.
* math/w_lgamma_r_template.c (declare_mgen_alias_r_x): Remove
macro.
(declare_mgen_alias_r_s): Likewise.
(declare_mgen_alias_r): Likewise.
* math/w_lgamma_r_compat.c: Include <libm-alias-double.h>.
(lgamma_r): Define using libm_alias_double_r.
* math/w_lgammaf_r_compat.c: Include <libm-alias-float.h>.
(lgammaf_r): Define using libm_alias_float_r.
* math/w_lgammal_r_compat.c: Include <libm-alias-ldouble.h>.
(lgammal_r): Define using libm_alias_ldouble_r.
* sysdeps/ieee754/ldbl-opt/w_lgamma_r_compat.c: Remove file.
* sysdeps/ieee754/ldbl-opt/w_lgammal_r_compat.c: Likewise.
Joseph Myers [Mon, 9 Oct 2017 16:52:56 +0000 (16:52 +0000)]
Remove ldbl-opt w_scalbln.c.
The ldbl-opt version of w_scalbln.c is not in fact needed; it handles
compat symbol versions for libc, but this file isn't built for libc,
only for libm. This patch removes this file.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by this patch.
Jonathan Wakely [Mon, 9 Oct 2017 13:58:34 +0000 (14:58 +0100)]
Ensure C99 and C11 interfaces are available for C++ [BZ #21326]
This patch ensures that the C99 and C11 features required by C++ are
defined according to the value of the __cplusplus macro, and not just
because G++ always defines _GNU_SOURCE. This will allow G++ to stop
defining _GNU_SOURCE some day, without causing the C99 and C11
interfaces to disappear for C++ programs.
Newer kernels expose the ioctl TIOCGPTPEER [1] call to userspace which allows to
safely allocate a file descriptor for a pty slave based solely on the master
file descriptor. This allows us to avoid path-based operations and makes this
function a lot safer in the face of devpts mounts in different mount namespaces.
Joseph Myers [Fri, 6 Oct 2017 20:23:58 +0000 (20:23 +0000)]
Use libm_alias_double in ldbl-128, ldbl-96 fma.
This patch makes the ldbl-128 and ldbl-96 implementations of fma use
libm_alias_double.
Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by the patch.
* sysdeps/ieee754/ldbl-128/s_fma.c: Include <libm-alias-double.h>.
[!__fma] (fma): Define using libm_alias_double.
* sysdeps/ieee754/ldbl-96/s_fma.c: Include <libm-alias-double.h>.
[!__fma] (fma): Define using libm_alias_double.
Joseph Myers [Fri, 6 Oct 2017 17:45:05 +0000 (17:45 +0000)]
Use libm_alias_ldouble for ldbl-128 functions.
This patch makes ldbl-128 functions use libm_alias_ldouble to define
function aliases. float128_private.h is updated accordingly. Most of
the ldbl-64-128 wrappers are removed as no longer needed with this
change (leaving those that involve versioning for functions in libc or
that shouldn't be exported from libm for _Float128 / _Float64x types
with the same format as long double).
Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by this patch.
* sysdeps/ieee754/float128/float128_private.h: Include
<libm-alias-ldouble.h> and <libm-alias-float128.h>.
(libm_alias_ldouble_r): Undefine and redefine.
* sysdeps/ieee754/ldbl-128/s_asinhl.c: Include
<libm-alias-ldouble.h>.
(asinhl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_atanl.c: Include
<libm-alias-ldouble.h>.
(atanl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_cbrtl.c: Include
<libm-alias-ldouble.h>.
(cbrtl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_ceill.c: Include
<libm-alias-ldouble.h>.
(ceill): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_copysignl.c: Include
<libm-alias-ldouble.h>.
(copysignl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_cosl.c: Include
<libm-alias-ldouble.h>.
(cosl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_erfl.c: Include
<libm-alias-ldouble.h>.
(erfl): Define using libm_alias_ldouble.
(erfcl): Likewise.
* sysdeps/ieee754/ldbl-128/s_expm1l.c: Include
<libm-alias-ldouble.h>.
(expm1l): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_fabsl.c: Include
<libm-alias-ldouble.h>.
(fabsl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_floorl.c: Include
<libm-alias-ldouble.h>.
(floorl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_fmal.c: Include
<libm-alias-ldouble.h>.
(fmal): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_frexpl.c: Include
<libm-alias-ldouble.h>.
(frexpl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_fromfpl.c (fromfpl): Define using
libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_fromfpl_main.c: Include
<libm-alias-ldouble.h>.
* sysdeps/ieee754/ldbl-128/s_fromfpxl.c (fromfpxl): Define using
libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_getpayloadl.c: Include
<libm-alias-ldouble.h>.
(getpayloadl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_llrintl.c: Include
<libm-alias-ldouble.h>.
(llrintl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_llroundl.c: Include
<libm-alias-ldouble.h>.
(llroundl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_logbl.c: Include
<libm-alias-ldouble.h>.
(logbl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_lrintl.c: Include
<libm-alias-ldouble.h>.
(lrintl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_lroundl.c: Include
<libm-alias-ldouble.h>.
(lroundl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_modfl.c: Include
<libm-alias-ldouble.h>.
(modfl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_nearbyintl.c: Include
<libm-alias-ldouble.h>.
(nearbyintl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_nextafterl.c: Include
<libm-alias-ldouble.h>.
(nextafterl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_nextupl.c: Include
<libm-alias-ldouble.h>.
(nextupl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_remquol.c: Include
<libm-alias-ldouble.h>.
(remquol): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_rintl.c: Include
<libm-alias-ldouble.h>.
(rintl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_roundevenl.c: Include
<libm-alias-ldouble.h>.
(roundevenl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_roundl.c: Include
<libm-alias-ldouble.h>.
(roundl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_setpayloadl.c (setpayloadl): Define
using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_setpayloadl_main.c: Include
<libm-alias-ldouble.h>.
* sysdeps/ieee754/ldbl-128/s_setpayloadsigl.c (setpayloadsigl):
Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_sincosl.c: Include
<libm-alias-ldouble.h>.
(sincosl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_sinl.c: Include
<libm-alias-ldouble.h>.
(sinl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_tanhl.c: Include
<libm-alias-ldouble.h>.
(tanhl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_tanl.c: Include
<libm-alias-ldouble.h>.
(tanl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_totalorderl.c: Include
<libm-alias-ldouble.h>.
(totalorderl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_totalordermagl.c: Include
<libm-alias-ldouble.h>.
(totalordermagl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_truncl.c: Include
<libm-alias-ldouble.h>.
(truncl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_ufromfpl.c (ufromfpl): Define using
libm_alias_ldouble.
* sysdeps/ieee754/ldbl-128/s_ufromfpxl.c (ufromfpxl): Define using
libm_alias_ldouble.
* sysdeps/ieee754/ldbl-64-128/s_copysignl.c: Include
<libm-alias-ldouble.h>.
(weak_alias): Do not undefine and redefine.
[IS_IN (libc)] (libm_alias_ldouble): Undefine and redefine.
(copysignl): Define with long_double_symbol only if [IS_IN
(libc)].
* sysdeps/ieee754/ldbl-64-128/s_frexpl.c: Include
<libm-alias-ldouble.h>.
(weak_alias): Do not undefine and redefine.
[IS_IN (libc)] (libm_alias_ldouble): Undefine and redefine.
(frexpl): Define with long_double_symbol only if [IS_IN (libc)].
* sysdeps/ieee754/ldbl-64-128/s_modfl.c: Include
<libm-alias-ldouble.h>.
(weak_alias): Do not undefine and redefine.
[IS_IN (libc)] (libm_alias_ldouble): Undefine and redefine.
(modfl): Define with long_double_symbol only if [IS_IN (libc)].
* sysdeps/ieee754/ldbl-64-128/s_asinhl.c: Remove file.
* sysdeps/ieee754/ldbl-64-128/s_atanl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_cbrtl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_ceill.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_cosl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_erfl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_expm1l.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_fabsl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_floorl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_fmal.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_llrintl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_llroundl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_logbl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_lrintl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_lroundl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_nearbyintl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_remquol.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_rintl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_roundl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_sincosl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_sinl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_tanhl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_tanl.c: Likewise.
* sysdeps/ieee754/ldbl-64-128/s_truncl.c: Likewise.
Carlos O'Donell [Thu, 28 Sep 2017 17:05:18 +0000 (11:05 -0600)]
malloc: Fix tcache leak after thread destruction [BZ #22111]
The malloc tcache added in 2.26 will leak all of the elements remaining
in the cache and the cache structure itself when a thread exits. The
defect is that we do not set tcache_shutting_down early enough, and the
thread simply recreates the tcache and places the elements back onto a
new tcache which is subsequently lost as the thread exits (unfreed
memory). The fix is relatively simple, move the setting of
tcache_shutting_down earlier in tcache_thread_freeres. We add a test
case which uses mallinfo and some heuristics to look for unaccounted for
memory usage between the start and end of a thread start/join loop. It
is very reliable at detecting that there is a leak given the number of
iterations. Without the fix the test will consume 122MiB of leaked
memory.
Joseph Myers [Fri, 6 Oct 2017 15:02:12 +0000 (15:02 +0000)]
Remove redundant ldbl-64-128 files.
Various source files in ldbl-64-128 are redundant, because they wrap
files that no longer provide public symbols that need special
versioning (those symbols having moved to separate errno-setting
wrappers), or, in the case of w_scalblnl.c, because the type-generic
template now does everything required (it deals with symbol versioning
for use in libm, and this file is never built for libc anyway - the
compat scalbln* symbols in libc, as opposed to scalbn*, are only for
i386 and m68k and are aliases to the corresponding scalbn* symbols).
This patch removes those redundant files.
Tested with build-many-glibcs.py (for all ldbl-64-128 configurations)
that installed stripped shared libraries are unchanged by this patch.
Recent commit 59ba2d2b5421 missed to add __memrchr_power8 in
ifunc list. Also handled discarding unwanted bytes for
unaligned inputs in power8 optimization.
* sysdeps/powerpc/powerpc64/multiarch/memrchr-ppc64.c: Revert
back to powerpc32 file.
* sysdeps/powerpc/powerpc64/multiarch/memrchr.c
(memrchr): Add __memrchr_power8 to ifunc list.
* sysdeps/powerpc/powerpc64/power8/memrchr.S: Mask
extra bytes for unaligned inputs.
Joseph Myers [Thu, 5 Oct 2017 21:13:40 +0000 (21:13 +0000)]
Use libm_alias_ldouble for ldbl-96 functions.
This patch makes ldbl-96 functions use libm_alias_ldouble to define
function aliases.
Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by the patch.
* sysdeps/ieee754/ldbl-96/s_asinhl.c: Include
<libm-alias-ldouble.h>.
(asinhl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_cbrtl.c: Include
<libm-alias-ldouble.h>.
(cbrtl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_copysignl.c: Include
<libm-alias-ldouble.h>.
(copysignl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_cosl.c: Include
<libm-alias-ldouble.h>.
(cosl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_erfl.c: Include
<libm-alias-ldouble.h>.
(erfl): Define using libm_alias_ldouble.
(erfcl): Likewise.
* sysdeps/ieee754/ldbl-96/s_fmal.c: Include
<libm-alias-ldouble.h>.
(fmal): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_frexpl.c: Include
<libm-alias-ldouble.h>.
(frexpl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_fromfpl.c (fromfpl): Define using
libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_fromfpl_main.c: Include
<libm-alias-ldouble.h>.
* sysdeps/ieee754/ldbl-96/s_fromfpxl.c (fromfpxl): Define using
libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_getpayloadl.c: Include
<libm-alias-ldouble.h>.
(getpayloadl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_llrintl.c: Include
<libm-alias-ldouble.h>.
(llrintl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_llroundl.c: Include
<libm-alias-ldouble.h>.
(llroundl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_lrintl.c: Include
<libm-alias-ldouble.h>.
(lrintl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_lroundl.c: Include
<libm-alias-ldouble.h>.
(lroundl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_modfl.c: Include
<libm-alias-ldouble.h>.
(modfl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_nextupl.c: Include
<libm-alias-ldouble.h>.
(nextupl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_remquol.c: Include
<libm-alias-ldouble.h>.
(remquol): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_roundevenl.c: Include
<libm-alias-ldouble.h>.
(roundevenl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_roundl.c: Include
<libm-alias-ldouble.h>.
(roundl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_setpayloadl.c (setpayloadl): Define
using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_setpayloadl_main.c: Include
<libm-alias-ldouble.h>.
* sysdeps/ieee754/ldbl-96/s_setpayloadsigl.c: Include
<libm-alias-ldouble.h>.
(setpayloadsigl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_sincosl.c: Include
<libm-alias-ldouble.h>.
(sincosl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_sinl.c: Include
<libm-alias-ldouble.h>.
(sinl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_tanhl.c: Include
<libm-alias-ldouble.h>.
(tanhl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_tanl.c: Include
<libm-alias-ldouble.h>.
(tanl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_totalorderl.c: Include
<libm-alias-ldouble.h>.
(totalorderl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_totalordermagl.c: Include
<libm-alias-ldouble.h>.
(totalordermagl): Define using libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_ufromfpl.c (ufromfpl): Define using
libm_alias_ldouble.
* sysdeps/ieee754/ldbl-96/s_ufromfpxl.c (ufromfpxl): Define using
libm_alias_ldouble.
aarch64: Optimized implementation of memmove for Qualcomm Falkor
This is an optimized memmove implementation for the Qualcomm Falkor
processor core. Due to the way the falkor memcpy needs to be written,
code cannot be easily shared between memmove and memcpy like in case
of other aarch64 memcpy implementations due to which this routine is
separate. The underlying principle is the same as that of memcpy
where it tries to use registers with the same lower 4 bits for
fetching the same stream, thus optimizing hardware prefetcher
performance.
The memcpy copy loop copies 64 bytes at a time using the same register
pair since that's the way to train the hardware prefetcher on the
falkor core. memmove cannot quite do that since it needs to avoid
overlaps, so it does the next best thing, i.e. has a 32 byte loop with
a 32 byte end (prefetch a loop ahead to account for overlapping
locations) with register pairs that alias so that they hit the same
prefetcher. Due to this difference in loop size, they have to
currently be separate implementations but efforts are on to try and
get memmove to fall back into memcpy whenever it can without simply
duplicating all of the code.
Performance:
The routine fares around 20-25% better than the generic memmove for
most medium to large sizes (i.e. > 128 bytes) for the new walking
memmove benchmark (memmove-walk) with an unexplained regression
between 1K and 2K. The minor regression is something worth looking
into for us, but the remaining gains are significant enough that we
would like this included upstream as we looking into the cause for the
regression. Here is a snippet of the numbers as generated from the
microbenchmark by the compare_strings script. Comparisons are against
__memmove_generic:
This benchmark is an attempt to eliminate cache effects from string
benchmarks. The benchmark walks both ways through a large memory area
and copies different sizes of memory and alignments one at a time
instead of looping around in the same memory area. This is a good
metric to have alongside the simple memmove benchmark (which is only
really useful for smaller sizes) especially for larger sizes where the
likelihood of the call being done only once is pretty high.
This benchmark is different from memcpy in that it also tests
overlapping copies.
* benchtests/bench-memmove-walk.c: New file.
* benchtests/Makefile (string-benchset): Add it.
This benchmark is an attempt to eliminate cache effects from string
benchmarks. The benchmark walks backward through a large memory area
and sets different sizes of memory and alignments one at a time
instead of looping around in the same memory area. This is a good
metric to have alongside the simple memset benchmark (which is only
really useful for smaller sizes) especially for larger sizes where the
likelihood of the call being done only once is pretty high.
* benchtests/bench-memset-walk.c: New file.
* benchtests/Makefile (string-benchset): Add it.
This benchmark is an attempt to eliminate cache effects from string
benchmarks. The benchmark walks both ways through a large memory area
and copies different sizes of memory and alignments one at a time
instead of looping around in the same memory area. This is a good
metric to have alongside the other memcpy benchmarks, especially for
larger sizes where the likelihood of the call being done only once is
pretty high.
* benchtests/bench-memcpy-walk.c: New file.
* benchtests/Makefile (string-benchset): Add it.
Joseph Myers [Thu, 5 Oct 2017 15:58:13 +0000 (15:58 +0000)]
Remove add-ons mechanism.
glibc has an add-ons mechanism to allow additional software to be
integrated into the glibc build. Such add-ons may be within the glibc
source tree, or outside it at a path passed to the --enable-add-ons
configure option.
localedata and crypt were once add-ons, distributed in separate
release tarballs, but long since stopped using that mechanism.
Linuxthreads was always an add-on. Ports spent some time as an add-on
with separate release tarballs, then was first moved into the glibc
source tree, then had its sysdeps files moved into the main sysdeps
hierarchy so the add-ons mechanism was no longer used. NPTL spent
some time as an add-on in the main glibc tree before stopping using
the add-on mechanism. libidn used to have separate release tarballs
but no longer does so, but still uses the add-ons mechanism within the
glibc source tree. Various other software has supported building with
the add-ons mechanism at times in the past, but I don't think any is
still widely used.
Add-ons involve significant, little-used complexity in the glibc build
system, and make it hard to understand what the space of possible
glibc configurations is. This patch removes the add-ons mechanism.
libidn is now built via the Subdirs mechanism to cause any
configuration using sysdeps/unix/inet to build libidn; HAVE_LIBIDN
(which effectively means shared libraries are available) is now
defined via sysdeps/unix/inet/configure. Various references to
add-ons around the source tree are removed (in the case of maint.texi,
the example list of sysdeps directories is still very out of date).
Externally maintained ports should now put their files in the normal
sysdeps directory structure rather than being arranged as add-ons;
they probably need to change e.g. elf.h anyway, rather than actually
being able to work just as a drop-in subtree. Hurd libpthread should
be arranged similarly to NPTL, so some files might go in a
hurd-pthreads (or similar) top-level directory in glibc, while sysdeps
files should go in the normal sysdeps directory structure (possibly in
hurd or hurd-pthreads subdirectories, just as there are nptl
subdirectories in the sysdeps tree).
Tested for x86_64, and with build-many-glibcs.py.
* configure.ac (--enable-add-ons): Remove option.
(machine): Do not mention add-ons in comment.
(LIBC_PRECONFIGURE): Likewise.
(add_ons): Remove variable and sanity checks and logic to locate
add-ons.
(add_ons_automatic): Remove variable.
(configured_add_ons): Likewise.
(add_ons_sfx): Likewise.
(add_ons_pfx): Likewise.
(add_on_subdirs): Likewise.
(sysnames_add_ons): Likewise. Remove loop over add-ons and
consideration of add-ons in Implies handling.
(sysdeps_add_ons): Likewise.
* configure: Regenerated.
* libidn/configure.ac: Remove.
* libidn/configure: Likewise.
* sysdeps/unix/inet/configure.ac: New file.
* sysdeps/unix/inet/configure: New generated file.
* sysdeps/unix/inet/Subdirs: Add libidn.
* Makeconfig (sysdeps-srcdirs): Remove variable.
(+sysdep_dirs): Do not include $(sysdeps-srcdirs).
($(common-objpfx)config.status): Do not depend on add-on files.
($(common-objpfx)shlib-versions.v.i): Do not mention add-ons in
comment.
(all-subdirs): Do not include $(add-on-subdirs).
* Makefile (dist-prepare): Do not use $(sysdeps-add-ons).
* config.make.in (add-ons): Remove variable.
(add-on-subdirs): Likewise.
(sysdeps-add-ons): Likewise.
* manual/Makefile (add-chapters): Remove.
($(objpfx)texis): Do not depend on $(add-chapters).
(nonexamples): Do not handle $(add-chapters).
(examples): Do not handle $(add-ons).
(chapters.% top-menu.%): Do not pass '$(add-chapters)' to
libc-texinfo.sh.
* manual/install.texi (Installation): Do not mention add-ons.
(--enable-add-ons): Do not document configure option.
* INSTALL: Regenerated.
* manual/libc-texinfo.sh: Do not handle $2 add-ons argument.
* manual/maint.texi (Hierarchy Conventions): Do not mention
add-ons.
* scripts/build-many-glibcs.py (Glibc.build_glibc): Do not use
--enable-add-ons.
* scripts/gen-sorted.awk: Do not handle Subdirs files from
add-ons.
* scripts/test-installation.pl: Do not handle glibc-compat add-on.
* sysdeps/nptl/Makeconfig: Do not mention add-ons in comment.
Florian Weimer [Thu, 5 Oct 2017 12:34:26 +0000 (14:34 +0200)]
tst-gmon: Build with -fno-omit-frame-pointer
If glibc is built with -fomit-frame-pointer to undo the effect of
configuring GCC with --enable-frame-pointer, using -pg by itself results
in a build failure:
gcc: error: -pg and -fomit-frame-pointer are incompatible
H.J. Lu [Thu, 5 Oct 2017 00:18:23 +0000 (17:18 -0700)]
Don't use hidden visibility in libc.a with PIE on i386
On i386, when multi-arch is enabled, all external functions must be
called via PIC PLT in PIE, which requires setting up EBX register,
since they may be IFUNC functions.
* config.h.in (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New.
* include/libc-symbols.h (__hidden_proto_hiddenattr): Add check
for PIC and NO_HIDDEN_EXTERN_FUNC_IN_PIE.
* sysdeps/i386/configure.ac (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New
AC_DEFINE if multi-arch is enabled.
* sysdeps/i386/configure: Regenerated.
H.J. Lu [Thu, 5 Oct 2017 00:15:50 +0000 (17:15 -0700)]
Use $(DEFAULT-LDFLAGS-$(@F)) in +link-static-before-libc
Use $(LDFLAGS-$(@F)) with tst-tls1-static-non-pie may not be sufficient
when static PIE is built by default. Use $(DEFAULT-LDFLAGS-$(@F)) in
+link-static-before-libc to make sure that tst-tls1-static-non-pie is
always built as non-PIE static executable and make sure that crt1.o is
used with tst-tls1-static-non-pie.
* Makeconfig (+link-static-before-libc): Use
$(DEFAULT-LDFLAGS-$(@F)).
* elf/Makefile (CRT-tst-tls1-static-non-pie): New.
(LDFLAGS-tst-tls1-static-non-pie): Renamed to ...
(DEFAULT-LDFLAGS-tst-tls1-static-non-pie): This.
Joseph Myers [Wed, 4 Oct 2017 20:32:48 +0000 (20:32 +0000)]
Use libm_alias_double for dbl-64 fma.
This patch makes dbl-64 fma use libm_alias_double. The ldbl-opt
version is removed. The sparc32 version no longer needs to handle
compat symbols, while alpha needs a new wrapper to avoid getting the
ldbl-128 version (where ldbl-opt is earlier in the list of sysdeps
directories, so previously fma came from there).
Tested for x86_64, and tested with build-many-glibcs.py that installed
stripped shared libraries are unchanged by the patch.
* sysdeps/ieee754/dbl-64/s_fma.c: Include <libm-alias-double.h>.
(fma): Define using libm_alias_double.
* sysdeps/ieee754/ldbl-opt/s_fma.c: Remove file.
* sysdeps/sparc/sparc32/fpu/s_fma.c: Do not include
<math_ldbl_opt.h>.
(fmal): Do not define as compat symbol here.
* sysdeps/alpha/fpu/s_fma.c: New file.
32-bit SPARC libm should have compat symbols for copysignl
(GLIBC_2.0), fabsl (GLIBC_2.0), fmal (GLIBC_2.1), pointing to the
double functions; they were present in glibc 2.8, for example, but are
now missing, probably when optimized SPARC function implementations
were added without appropriate compat symbol handling. The same
applies to copysignl in libc. This patch restores those compat
symbols.
Tested with build-many-glibcs.py for sparcv9-linux-gnu.
[BZ #22229]
* sysdeps/sparc/sparc32/fpu/s_copysign.S: Include
<math_ldbl_opt.h>
(copysignl): Define as compat symbol at version GLIBC_2_0 for libm
and libc.
* sysdeps/sparc/sparc32/fpu/s_fabs.S: Include <math_ldbl_opt.h>.
(fabsl): Define as compat symbol at version GLIBC_2_0 for libm.
* sysdeps/sparc/sparc32/fpu/s_fma.c: Include <math_ldbl_opt.h>.
(fmal): Define as compat symbol at version GLIBC_2_1 for libm.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysign.S:
Include <math_ldbl_opt.h>
(copysignl): Define as compat symbol at version GLIBC_2_0 for libm
and libc.
(compat_symbol): Undefine and redefine.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fabs.S: Include
<math_ldbl_opt.h>
(fabsl): Define as compat symbol at version GLIBC_2_0 for libm.
(compat_symbol): Undefine and redefine.
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fma.c
[HAVE_AS_VIS3_SUPPORT]: Include <math_ldbl_opt.h>.
[HAVE_AS_VIS3_SUPPORT] (fmal): Define as compat symbol at version
GLIBC_2_1 for libm.
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Add
GLIBC_2.0 copysignl symbol.
* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Add
GLIBC_2.0 copysignl and fabsl and GLIBC_2.1 fmal symbols.
Joseph Myers [Wed, 4 Oct 2017 15:57:53 +0000 (15:57 +0000)]
Remove alpha nearbyint wrapper.
Given my recent changes, sysdeps/alpha/fpu/s_nearbyint.c is no longer
needed: it just includes the dbl-64/wordsize-64 version, which is the
one that would be used anyway, and defines a compat symbol,
duplicating the same compat symbol defined by the dbl-64/wordsize-64
version through use of libm_alias_double. Thus, this patch removes
the redundant wrapper.
Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged for alpha.
crypt: Use NSPR header files in addition to NSS header files [BZ #17956]
When configuring and building GNU libc using the Mozilla NSS library
for cryptography (--enable-nss-crypt option), also include the
NSPR header files along with the Mozilla NSS library header files.
Finally, when running the check-local-headers test, ignore the
Mozilla NSPR library header files (used by the Mozilla NSS library).