glibc:fw/twalk_r-iconv

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a7b23b3... by Florian Weimer on 2019-05-02

iconv: Use __twalk_r in __gconv_release_shlib

7b807a3... by Florian Weimer on 2019-05-02

misc: Add twalk_r function

The twalk function is very difficult to use in a multi-threaded
program because there is no way to pass external state to the
iterator function.

Reviewed-by: Carlos O'Donell <email address hidden>
Reviewed-by: Adhemerval Zanella <email address hidden>

20aa581... by Paul Eggert on 2019-03-18

Make mktime etc. compatible with __time64_t

Keep these functions compatible with Gnulib while adding
__time64_t support. The basic idea is to move private API
declarations from include/time.h to time/mktime-internal.h, since
the former file cannot easily be shared with Gnulib whereas the
latter can.
Also, do some other minor cleanup while in the neighborhood.
* include/time.h: Include stdbool.h, time/mktime-internal.h.
(__mktime_internal): Move this prototype to time/mktime-internal.h,
since Gnulib needs it.
(__localtime64_r, __gmtime64_r) [__TIMESIZE == 64]:
Move these macros to time/mktime-internal.h, since Gnulib needs them.
(__mktime64, __timegm64) [__TIMESIZE != 64]: New prototypes.
(in_time_t_range): New static function.
* posix/bits/types.h (__time64_t) [__TIMESIZE == 64 && !defined __LIBC]:
Do not define as a macro in this case, so that portable code is
less tempted to use __time64_t.
* time/mktime-internal.h: Rewrite so that it does both glibc
and Gnulib work. Include time.h if not _LIBC.
(mktime_offset_t) [!_LIBC]: Define for gnulib.
(__time64_t, __gmtime64_r, __localtime64_r, __mktime64, __timegm64)
[!_LIBC || __TIMESIZE == 64]: New macros, mostly moved here
from include/time.h.
(__gmtime_r, __localtime_r, __mktime_internal) [!_LIBC]:
New macros, taken from GNulib.
(__mktime_internal): New prototype, moved here from include/time.h.
* time/mktime.c (mktime_min, mktime_max, convert_time)
(ranged_convert, __mktime_internal, __mktime64):
* time/timegm.c (__timegm64):
Use __time64_t, not time_t.
* time/mktime.c: Stop worrying about whether time_t is floating-point.
(__mktime64) [! (_LIBC && __TIMESIZE != 64)]:
Rename from mktime.
(mktime) [_LIBC && __TIMESIZE != 64]: New function.
* time/timegm.c [!_LIBC]: Include libc-config.h, not config.h,
for libc_hidden_def.
Include errno.h.
(__timegm64) [! (_LIBC && __TIMESIZE != 64)]:
Rename from timegm.
(timegm) [_LIBC && __TIMESIZE != 64]: New function.

First cut at publicizing __time64_t

87c266d... by "Maciej W. Rozycki" <email address hidden> on 2019-04-30

Fix -O1 compilation errors with `__ddivl' and `__fdivl' [BZ #19444]

Complementing commit 4a06ceea33ec ("sysdeps/ieee754/soft-fp: ignore
maybe-uninitialized with -O [BZ #19444]") and commit 27c5e756a2a8
("sysdeps/ieee754: prevent maybe-uninitialized errors with -O [BZ
#19444]") also fix compilation errors observed at -O1 in `__ddivl' and
`__fdivl' with GCC 9 and RISC-V targets:

In file included from ../soft-fp/soft-fp.h:318,
                 from ../sysdeps/ieee754/soft-fp/s_fdivl.c:27:
../sysdeps/ieee754/soft-fp/s_fdivl.c: In function '__fdivl':
../soft-fp/op-2.h:108:9: error: 'R_f1' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  108 | : (X##_f1 << (2*_FP_W_TYPE_SIZE - (N)))) \
      | ^
../sysdeps/ieee754/soft-fp/s_fdivl.c:37:14: note: 'R_f1' was declared here
   37 | FP_DECL_Q (R);
      | ^
../soft-fp/op-common.h:39:3: note: in expansion of macro '_FP_FRAC_DECL_2'
   39 | _FP_FRAC_DECL_##wc (X)
      | ^~~~~~~~~~~~~~
../soft-fp/quad.h:226:24: note: in expansion of macro '_FP_DECL'
  226 | # define FP_DECL_Q(X) _FP_DECL (2, X)
      | ^~~~~~~~
../sysdeps/ieee754/soft-fp/s_fdivl.c:37:3: note: in expansion of macro 'FP_DECL_Q'
   37 | FP_DECL_Q (R);
      | ^~~~~~~~~
../soft-fp/op-2.h:109:8: error: 'R_f0' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  109 | | X##_f0) != 0)); \
      | ^
../sysdeps/ieee754/soft-fp/s_fdivl.c:37:14: note: 'R_f0' was declared here
   37 | FP_DECL_Q (R);
      | ^
../soft-fp/op-common.h:39:3: note: in expansion of macro '_FP_FRAC_DECL_2'
   39 | _FP_FRAC_DECL_##wc (X)
      | ^~~~~~~~~~~~~~
../soft-fp/quad.h:226:24: note: in expansion of macro '_FP_DECL'
  226 | # define FP_DECL_Q(X) _FP_DECL (2, X)
      | ^~~~~~~~
../sysdeps/ieee754/soft-fp/s_fdivl.c:37:3: note: in expansion of macro 'FP_DECL_Q'
   37 | FP_DECL_Q (R);
      | ^~~~~~~~~
In file included from ../soft-fp/soft-fp.h:318,
                 from ../sysdeps/ieee754/soft-fp/s_ddivl.c:31:
../sysdeps/ieee754/soft-fp/s_ddivl.c: In function '__ddivl':
../soft-fp/op-2.h:98:25: error: 'R_f1' may be used uninitialized in this function [-Werror=maybe-uninitialized]
   98 | X##_f0 = (X##_f1 << (_FP_W_TYPE_SIZE - (N)) | X##_f0 >> (N) \
      | ^~
../sysdeps/ieee754/soft-fp/s_ddivl.c:41:14: note: 'R_f1' was declared here
   41 | FP_DECL_Q (R);
      | ^
../soft-fp/op-2.h:37:36: note: in definition of macro '_FP_FRAC_DECL_2'
   37 | _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT
      | ^
../soft-fp/quad.h:226:24: note: in expansion of macro '_FP_DECL'
  226 | # define FP_DECL_Q(X) _FP_DECL (2, X)
      | ^~~~~~~~
../sysdeps/ieee754/soft-fp/s_ddivl.c:41:3: note: in expansion of macro 'FP_DECL_Q'
   41 | FP_DECL_Q (R);
      | ^~~~~~~~~
../soft-fp/op-2.h:101:17: error: 'R_f0' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  101 | : (X##_f0 << (_FP_W_TYPE_SIZE - (N))) != 0)); \
      | ^~
../sysdeps/ieee754/soft-fp/s_ddivl.c:41:14: note: 'R_f0' was declared here
   41 | FP_DECL_Q (R);
      | ^
../soft-fp/op-2.h:37:14: note: in definition of macro '_FP_FRAC_DECL_2'
   37 | _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT
      | ^
../soft-fp/quad.h:226:24: note: in expansion of macro '_FP_DECL'
  226 | # define FP_DECL_Q(X) _FP_DECL (2, X)
      | ^~~~~~~~
../sysdeps/ieee754/soft-fp/s_ddivl.c:41:3: note: in expansion of macro 'FP_DECL_Q'
   41 | FP_DECL_Q (R);
      | ^~~~~~~~~
cc1: all warnings being treated as errors
make[2]: *** [.../sysd-rules:587: .../math/s_fdivl.o] Error 1
make[2]: *** Waiting for unfinished jobs....
cc1: all warnings being treated as errors
make[2]: *** [.../sysd-rules:587: .../math/s_ddivl.o] Error 1

This comes from cases in _FP_DIV that return a result described as
FP_CLS_ZERO or FP_CLS_INF and do not initialize the fractional part,
which is then operated on unconditionally in FP_TRUNC_COOKED before
being ignored by _FP_PACK_CANONICAL.

Clearly at this optimization level GCC cannot guarantee to be able to
determine that the fractional part is ultimately unused, so ignore the
error as with the earlier commits referred, letting compilation proceed.

 [BZ #19444]
 * sysdeps/ieee754/soft-fp/s_ddivl.c (__ddivl): Ignore errors
 from `-Wmaybe-uninitialized'.
 * sysdeps/ieee754/soft-fp/s_fdivl.c (__fdivl): Likewise.

6cac323... by Adhemerval Zanella on 2019-03-15

powerpc: ceil/ceilf refactor

This patches consolidates all the powerpc ceil{f} implementations on
the generic sysdeps/powerpc/fpu/s_ceil{f}. The generic implementation
uses either the compiler builts for ISA 2.03+ (which generates the frip
instruction) or a generic implementation which uses FP only operations.

It adds a generic implementation (round_to_integer.h) which is shared
with other rounding to integer routines. The resulting code should be
similar in term os performance to previous assembly one.

The IFUNC organization for powerpc64 is also change to be enabled only
for powerpc64 and not for powerpc64le (since minium ISA of 2.08 does not
require the fallback generic implementation).

Checked on powerpc-linux-gnu (built without --with-cpu, with
--with-cpu=power4 and with --with-cpu=power5+ and --disable-multi-arch),
powerpc64-linux-gnu (built without --with-cp and with --with-cpu=power5+
and --disable-multi-arch).

 * sysdeps/powerpc/fpu/fenv_libc.h (__fesetround_inline_nocheck): New
 function.
 * sysdeps/powerpc/fpu/round_to_integer.h: New file.
 * sysdeps/powerpc/fpu/s_ceil.c: Likewise.
 * sysdeps/powerpc/fpu/s_ceilf.c: Likewise.
 * sysdeps/powerpc/powerpc32/fpu/s_ceil.S: Remove file.
 * sysdeps/powerpc/powerpc32/fpu/s_ceilf.S: Likewise.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/Makefile
 (CFLAGS-s_ceil-power5+.c, CFLAGS-s_ceilf-power5+.c): New rule.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-power5+.S:
 Remove file.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-ppc32.S:
 Likewise.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-power5+.S:
 Likewise.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-ppc32.S:
 Likewise.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-power5+.c:
 New file.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil-ppc32.c:
 Likewise.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-power5+.c:
 Likewise.
 * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf-ppc32.c:
 Likewise.
 * sysdeps/powerpc/powerpc32/power5+/fpu/s_ceil.S: Remove file.
 * sysdeps/powerpc/powerpc32/power5+/fpu/s_ceilf.S: Likewise.
 * sysdeps/powerpc/powerpc64/be/fpu/multiarch/Makefile: New file.
 * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-power5+.c:
 Likewise.
 * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil-ppc64.c:
 Likewise.
 * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceil.c: Move to ...
 * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceil.c: ... here.
 * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-power5+.c: New
 file.
 * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf-ppc64.c:
 Likewise.
 * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceilf.c: Move to ...
 * sysdeps/powerpc/powerpc64/be/fpu/multiarch/s_ceilf.c: ...
 * here.
 * sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
 (libm-sysdep_routines): Remove s_ceil-power5+, s_ceil-ppc64,
 s_ceilf-power5+, and s_ceilf-ppc64.
 * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceil-power5+.S: Remove
 file.
 * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceil-ppc64.S: Likewise.
 * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceilf-power5+.S: Likewise.
 * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceilf-ppc64.S: Likewise.
 * sysdeps/powerpc/powerpc64/fpu/s_ceil.S: Likewise.
 * sysdeps/powerpc/powerpc64/fpu/s_ceilf.S: Likewise.
 * sysdeps/powerpc/powerpc64/power5+/fpu/s_ceil.S: Likewise.
 * sysdeps/powerpc/powerpc64/power5+/fpu/s_ceilf.S: Likewise.

Reviewed-by: Gabriel F. T. Gomes <email address hidden>

c4c0848... by Adhemerval Zanella on 2019-03-20

powerpc: Remove power4 mpa optimization

This patch removes the POWER4 optimized mpa optimization used currently
on all powerpc targets. In fact for newer chips, GCC generates *worse*
code than generic implementation as below. One possibilty would to
add ifunc variants for the mpa routines (as x86_64), but it will add
complexity only for older chips (and one would need to check if
power5, power5+, and power6 do benefict from this optimization),
and only for specific implementation (since most used one such
as sin, cos, exp, pow where optimized to avoid calling the slow
multiprecision path).

* POWER9 patched
$ ./testrun.sh benchtests/bench-atan
  "atan": {
   "": {
    "duration": 5.12565e+09,
    "iterations": 1.552e+08,
    "max": 100.552,
    "min": 7.799,
    "mean": 33.0261
   },
   "144bits": {
    "duration": 5.12745e+09,
    "iterations": 825000,
    "max": 7517.17,
    "min": 6186.3,
    "mean": 6215.09
   }
  }
$ ./testrun.sh benchtests/bench-acos
  "acos": {
   "": {
    "duration": 5.21741e+09,
    "iterations": 1.269e+08,
    "max": 191.738,
    "min": 7.931,
    "mean": 41.1144
   },
   "slow": {
    "duration": 5.25999e+09,
    "iterations": 198000,
    "max": 26681.7,
    "min": 26463.6,
    "mean": 26565.6
   }
  }

* POWER9 master
$ ./testrun.sh benchtests/bench-atan
  "atan": {
   "": {
    "duration": 5.12815e+09,
    "iterations": 1.552e+08,
    "max": 134.788,
    "min": 7.803,
    "mean": 33.0422
   },
   "144bits": {
    "duration": 5.1209e+09,
    "iterations": 447000,
    "max": 11615.8,
    "min": 11301.8,
    "mean": 11456.2
   }
  }
$ ./testrun.sh benchtests/bench-acos
  "acos": {
   "": {
    "duration": 5.22272e+09,
    "iterations": 1.269e+08,
    "max": 115.981,
    "min": 7.931,
    "mean": 41.1562
   },
   "slow": {
    "duration": 5.28723e+09,
    "iterations": 96000,
    "max": 55434.1,
    "min": 54820.6,
    "mean": 55075.3
   }
  }

* POWER8 patched
$ taskset -c 16 ./testrun.sh benchtests/bench-acos
  "acos": {
   "": {
    "duration": 5.16398e+09,
    "iterations": 9.99e+07,
    "max": 174.408,
    "min": 8.645,
    "mean": 51.6915
   },
   "slow": {
    "duration": 5.16982e+09,
    "iterations": 96000,
    "max": 54830.5,
    "min": 53703.8,
    "mean": 53852.3
   }
  }
* POWER8 master
$ taskset -c 16 ./testrun.sh benchtests/bench-acos
  "acos": {
   "": {
    "duration": 5.17019e+09,
    "iterations": 9.99e+07,
    "max": 186.127,
    "min": 8.633,
    "mean": 51.7537
   },
   "slow": {
    "duration": 5.34225e+09,
    "iterations": 90000,
    "max": 60353.2,
    "min": 59155.3,
    "mean": 59358.4
   }
  }

* POWER7 patched
$ taskset -c 16 benchtests/bench-asin
  "asin": {
   "": {
    "duration": 5.15559e+09,
    "iterations": 6.5e+07,
    "max": 193.335,
    "min": 12.227,
    "mean": 79.3168
   },
   "slow": {
    "duration": 5.20538e+09,
    "iterations": 80000,
    "max": 65705.2,
    "min": 64299.4,
    "mean": 65067.3
   }
  }
* POWER7 master
$ taskset -c 16 benchtests/bench-asin
  "asin": {
   "": {
    "duration": 5.15446e+09,
    "iterations": 6.5e+07,
    "max": 184.575,
    "min": 12.226,
    "mean": 79.2994
   },
   "slow": {
    "duration": 5.20616e+09,
    "iterations": 80000,
    "max": 65705.1,
    "min": 64336.6,
    "mean": 65076.9
   }
  }

Checked on powerpc-linux-gnu (built without --with-cpu, with
--with-cpu=power4 and with --with-cpu=power5+ and --disable-multi-arch),
powerpc64-linux-gnu (built without --with-cp and with --with-cpu=power5+
and --disable-multi-arch).

 * sysdeps/powerpc/power4/fpu/Makefile: Remove file.
 * sysdeps/powerpc/power4/fpu/mpa-arch.h: Likewise.
 * sysdeps/powerpc/power4/fpu/mpa.c: Likewise.

Reviewed-by: Gabriel F. T. Gomes <email address hidden>

f492fc9... by Yann Droneaud on 2019-04-29

<semaphore.h>: Add nonnull attributes

Except the following functions, NPTL implementation assume sem_t
argument (or other arguments) are not NULL, so they would benefit
from having the nonnull attribute.

- sem_close(): can cope with a NULL sem_t and return -1 with error EINVAL;
- sem_destroy(): does nothing at all

 * sysdeps/pthread/semaphore.h (sem_init): Add __nonnull attribute.
 (sem_destroy, sem_open, sem_close, sem_unlink): Likewise.
 (sem_wait, sem_timedwait, sem_trywait, sem_post): Likewise.
 (sem_getvalue): Likewise.

c57afec... by Florian Weimer on 2019-04-26

elf: Link sotruss-lib.so with BIND_NOW for --enable-bind-now

The audit module itself can be linked with BIND_NOW; it does not
affect its functionality.

This should complete the leftovers from commit
2d6ab5df3b675e96ee587ae6a8c2ce004c6b1ba9 ("Document and fix
--enable-bind-now [BZ #21015]").

a8ff215... by Florian Weimer on 2019-04-26

Makeconfig: Move -Wl,-rpath-link options before library references

Previously, the -Wl,-rpath-link options came after the libraries
injected using LDLIBS-* variables on the link editor command line for
main programs. As a result, it could happen that installed libraries
that reference glibc libraries used the installed glibc from the system
directories, instead of the glibc from the build tree. This can lead to
link failures if the wrong version of libpthread.so.0 is used, for
instance, due to differences in the internal GLIBC_PRIVATE interfaces,
as seen with memusagestat and -lgd after commit
f9b645b4b0a10c43753296ce3fa40053fa44606a ("memusagestat: use local glibc
when linking [BZ #18465]").

The isolation is necessarily imperfect because these installed
libraries are linked against the installed glibc in the system
directories. However, in most cases, the built glibc will be newer
than the installed glibc, and this link is permitted because of the
ABI backwards compatibility glibc provides.

e30fb31... by Florian Weimer on 2019-04-26

Makeconfig: Move $(CC) to +link command variables

This change is needed to add linker flags which come very early in the
command linke (before LDFLAGS) and are not applied to test programs
(only to installed programs).