As discussed in libc-alpha [1], alpha ceil{f} and floor{f}
implementation uses cvttq/svm and although the Alpha Architecture
Handbook version 3 states that that CVTfi OUTPUT Exceptions
(B.3 Mapping to IEEE Standard) should not generate Inexact if INE
bit is set on fpcr, the Alpha 21264 [1] chip manual (A.8 IEEE
Floating-Point Conformance) states that CVTfi and CVTif OUTPUT
does generate inexact exception for inexact result regardless.
As Joseph noted [2] to correctly fix it on alpha we need to either
avoid the instruction or avoid any inexact bit from it being set
on return from the function (while preserving the inexact bit that
might be set on the entry to the function). The later will result
mf_fpcr followed by a mt_fpcr to get and set the fpcr which will
defeat the optimization itself.
So the patch just remove the alpha optimized and rely on generic
implementation. It fixes the math/test-*-{ceil,floor} on alpha.
[BZ #15479]
[BZ #22665]
* sysdeps/alpha/fpu/s_ceil.c: Remove file.
* sysdeps/alpha/fpu/s_ceilf.c: Likewise.
* sysdeps/alpha/fpu/s_floor.c: Likewise.
* sysdeps/alpha/fpu/s_floorf.c: Likewise.
[1] https://www.star.bnl.gov/public/daq/HARDWARE/21264_data_sheet.pdf
[2] https://sourceware.org/ml/libc-alpha/2018-01/msg00086.html
Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Before this change, if glibc was compiled with SSE instructions and a
sufficiently recent GCC, an unaligned stack access in
__run_exit_handlers would cause stdlib/tst-makecontext to crash.
This commit adds a new _dl_open_hook entry for dlvsym and implements the
function using the existing dl_lookup_symbol_x function supplied by the
dynamic loader.
A new hook variable, _dl_open_hook2, is introduced, which should make
this change suitable for backporting: For old statically linked
binaries, __libc_dlvsym will always return NULL.
Currently math_errhandling is always set to MATH_ERRNO | MATH_ERREXCEPT
even if -fno-math-errno is used. It is not defined at all when fast-math
is used. Set it to 0 with fast-math - this is noncomforming but more
useful than not define math_errhandling at all. Also take __NO_MATH_ERRNO__
into account and update comment.
* math/math.h (math_errhandling): Set to 0 with __FAST_MATH__.
Add __NO_MATH_ERRNO__ check.
Changelog:
* sysdeps/unix/sysv/linux/alpha/getrlimit64.c (__old_getrlimit64):
Drop __RLIM_T_MATCHES_RLIM64_T conditional as __old_getrlimit64 is
never defined in that case.
Changelog:
* sysdeps/unix/sysv/linux/alpha/getrlimit64.c: Fix a typo in the
comment.
* sysdeps/unix/sysv/linux/alpha/setrlimit64.c: Fix a typo in the
comment.
(settrlimit): Rename into setrlimit.
(__sttrlimit): Rename into __setrlimit.
I found that "make regen-ulps" failed when building with unmodified
GNU make 4.1, and an objdir /some/where/math/ longer than about 37
characters, because the list of tests in the "for run in $^" loop
exceeded the Linux kernel's MAX_ARG_STRLEN limit (131072 bytes) on the
length of a single argument passed to a command.
Some GNU/Linux distributions have a patch to make to work around this
limit (see e.g. Debian bug 688601), but clearly this ought to work
without needing such a patch. This patch arranges for the shell loop
to be over the test names without a $(objdir) prefix, which reduces
the space used to less than half MAX_ARG_STRLEN.
(I think we ought to aim to get rid of bits/mathinline.h completely -
filing GCC bugs for any optimizations GCC can't currently do with
-ffast-math - which would mean we could halve the number of libm tests
run because separate inline function tests would no longer be needed.
However, with a long directory name even half the number of tests
could make this command exceed MAX_ARG_STRLEN without my patch.)
Tested regen-ulps on a system where it failed before this patch.
* math/Makefile (run-regen-ulps): Add $(objpfx) to test name here.
(regen-ulps): Use $(libm-tests) not $^ in shell loop.
Various fmax and fmin function implementations mishandle sNaN
arguments:
(a) When both arguments are NaNs, the return value should be a qNaN,
but sometimes it is an sNaN if at least one argument is an sNaN.
(b) Under TS 18661-1 semantics, if either argument is an sNaN then the
result should be a qNaN (whereas if one argument is a qNaN and the
other is not a NaN, the result should be the non-NaN argument).
Various implementations treat sNaNs like qNaNs here.
One way to fix that is to detect the sNaN and add a special case. That
said there is no FPU instruction to do that, so it requires transfering
the FP value to an integer register and testing bits. This becomes quite
complicated so it's probably better to just use the generic versions of
these functions which just do that through issignaling.
Changelog:
[BZ #22660]
* sysdeps/alpha/fpu/s_fmax.S: Remove file.
* sysdeps/alpha/fpu/s_fmaxf.S: Likewise.
* sysdeps/alpha/fpu/s_fmin.S: Likewise.
* sysdeps/alpha/fpu/s_fminf.S: Likewise.
This patch updates various files from their upstream sources. This
brings in copyright date updates for some of those files.
Tested for x86_64.
* manual/texinfo.tex: Update to version 2017-12-26.21 with
trailing whitespace removed.
* scripts/config.guess: Update to version 2018-01-01.
* scripts/config.sub: Update to version 2018-01-01.
* scripts/move-if-change: Update from gnulib.
The patch which moved libio.h proper into the bits directory also
changed the name of its guard macro, and I neglected to check whether
anything depended on that name. It turns out that there is a
conditionally-used bits header that looks at it; this broke the libgcc
build on at least sparc64-*-* and sparcv9-*-*.
* libio/bits/libio-ldbl.h: Correct check for improper
inclusion. Add own multiple include guard.
The fillin_rpath function in elf/dl-load.c loops over each RPATH or
RUNPATH tokens and interprets empty tokens as the current directory
("./"). In practice the check for empty token is done *after* the
dynamic string token expansion. The expansion process can return an
empty string for the $ORIGIN token if __libc_enable_secure is set
or if the path of the binary can not be determined (/proc not mounted).
Fix that by moving the check for empty tokens before the dynamic string
token expansion. In addition, check for NULL pointer or empty strings
return by expand_dynamic_string_token.
The above changes highlighted a bug in decompose_rpath, an empty array
is represented by the first element being NULL at the fillin_rpath
level, but by using a -1 pointer in decompose_rpath and other functions.
Changelog:
[BZ #22625]
* elf/dl-load.c (fillin_rpath): Check for empty tokens before dynamic
string token expansion. Check for NULL pointer or empty string possibly
returned by expand_dynamic_string_token.
(decompose_rpath): Check for empty path after dynamic string
token expansion.
Move a shared part of sys/ptrace.h which is the same on all
architectures to a separate file.
* sysdeps/unix/sysv/linux/sys/ptrace.h: Include <bits/ptrace-shared.h>.
(__ptrace_setoptions, __ptrace_eventcodes, __ptrace_peeksiginfo_args,
__ptrace_peeksiginfo_flags, ptrace): Move to ...
* sysdeps/unix/sysv/linux/bits/ptrace-shared.h: ... new file.
* sysdeps/unix/sysv/linux/Makefile (sysdep_headers): Add
bits/ptrace-shared.h.
* sysdeps/unix/sysv/linux/aarch64/sys/ptrace.h: Include
<bits/ptrace-shared.h>.
(__ptrace_setoptions, __ptrace_eventcodes, __ptrace_peeksiginfo_args,
__ptrace_peeksiginfo_flags, ptrace): Remove.
* sysdeps/unix/sysv/linux/ia64/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/s390/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/sys/ptrace.h: Likewise.
* sysdeps/unix/sysv/linux/tile/sys/ptrace.h: Likewise.
malloc and realloc may set errno to ENOMEM even if they are successful.
The scandir code wrongly assume that they do not change errno, this
causes scandir to fail with ENOMEM even if malloc succeed.
The code already handles that readdir might set errno by calling
__set_errno (0) to clear the error. Move that part at the end of the
loop to also take malloc and realloc into account.
Changelog:
[BZ #17804]
* dirent/scandir-tail.c (SCANDIR_TAIL): Move __set_errno (0) at the
end of the loop. Improve comments.
The current glibc manual is ambiguous about the errno value on success
and suggests that it is left unchanged. Some functions might and
sometimes do change the errno value, however they never set it to 0.
This patch from Zack Weinberg clarifies this section of the manual.
Changelog:
[BZ #22615]
* manual/errno.texi (Checking for Errors): Explicitly say that errno
might be set on success.
POSIX explicitly says that applications should check errno only after
failure, so the errno value can be clobbered on success as long as it
is not set to zero.
Changelog:
[BZ #22611]
* malloc/tst-realloc.c (do_test): Remove the test checking that errno
is unchanged on success.
is_path argument is no longer used and could be safely removed.
* elf/dl-dst.h (DL_DST_COUNT): Remove is_path argument, all callers
updated.
* elf/dl-load.c (is_dst, _dl_dst_count, _dl_dst_substitute,
expand_dynamic_string_token): Likewise.
* sysdeps/generic/ldsodefs.h (_dl_dst_count, _dl_dst_substitute): Remove
is_path argument.
is_dst is called either by _dl_dst_count or by _dl_dst_substitute.
_dl_dst_count is called by DL_DST_COUNT only.
DL_DST_COUNT is called either by expand_dst with is_path == 0
or by expand_dynamic_string_token.
_dl_dst_substitute is called either from expand_dst with is_path == 0
or from expand_dynamic_string_token.
The latter function is called either from _dl_map_object with is_path == 0
or from fillin_rpath with is_path == 1 and name containing no ':'.
In any case (is_path && name[i] == ':') is always false and all code
depending on it can be safely removed.
* elf/dl-load.c (is_dst): Remove checks that is_path is set and name
contains ':', and all code depending on these checks.
There are just two users of _dl_dst_substitute: one is expand_dst that
sets is_path argument to 0, another one is expand_dynamic_string_token.
The latter function also has just two users: one is _dl_map_object that
sets is_path argument to 0, another one is fillin_rpath that sets
is_path argument to 1 and name argument contains no ':'.
In any case (is_path && name[i] == ':') is always false and all code
depending on it can be safely removed.
* elf/dl-load.c (_dl_dst_substitute): Remove checks that is_path
is set and name contains ':', and all code depending on these checks.
libio.h was originally the header for a set of supported GNU
extensions, but they have not been maintained as such in many years,
they are now standing in the way of improvements to stdio, and we
don't think there are any remaining external users. _G_config.h was
never intended for public use, but predates the bits convention.
Move both of these headers into the bits directory and provide stubs
at top level which issue deprecation warnings.
The contents of (bits/)libio.h and (bits/)_G_config.h are still
exposed to external software via stdio.h; changing that requires more
complex surgery than I have time to attempt right now.
* libio/libio.h, libio/_G_config.h: New stub headers which issue a
deprecation warning and then include <bits/libio.h>, <bits/_G_config.h>
respectively.
* libio/libio.h: Rename the original version of this file to
libio/bits/libio.h. Error out if not included by stdio.h or the
stub libio.h.
* include/libio.h: Move to include/bits. Forward to libio/bits/libio.h.
* sysdeps/generic/_G_config.h: Move to top-level bits/. Error out
if not included by bits/libio.h or the stub _G_config.h.
* sysdeps/unix/sysv/linux/_G_config.h: Move to
sysdeps/unix/sysv/linux/bits. Error out if not included by
bits/libio.h or the stub _G_config.h.
* libio/stdio.h: Include bits/libio.h, not libio.h.
* libio/Makefile: Install bits/libio.h and bits/_G_config.h as
well as libio.h and _G_config.h.
* csu/init.c, libio/fmemopen.c, libio/iolibio.h, libio/oldfmemopen.c
* libio/strfile.h, stdio-common/vfscanf.c
* sysdeps/pthread/flockfile.c, sysdeps/pthread/funlockfile.c
Include stdio.h, not _G_config.h nor libio.h.
* libio/iofgetpos.c: Also rename fgetpos64 out of the way.
* libio/iofsetpos.c: Also rename fsetpos64 out of the way.
* scripts/check-installed-headers.sh: Skip libio.h and _G_config.h.
That way it matches the standard and the behaviour of the finite
function.
Changelog:
[BZ #22596]
* manual/arith.texi (finite): Fix the description of the return
value.
aarch64 has several ifuncs now so test it without multiarch support separately.
* scripts/build-many-glibcs.py (Context.add_all_configs): Add
disable-multi-arch variant to aarch64-linux-gnu.
This patch updates various miscellaneous files from their upstream
sources.
Tested for x86_64, including "make pdf".
* manual/texinfo.tex: Update to version 2017-12-18.20 with
trailing whitespace removed.
* scripts/config.guess: Update to version 2017-12-17.
* scripts/config.sub: Update to version 2017-11-23.
* scripts/install-sh: Update to version 2017-09-23.17.
* scripts/move-if-change: Update to version 2017-09-13 06:45.
With tilepro removal, the uppercase instruction are not anymore
required to be defines as potentially macros. This is a
mechanical change done by the following shell script:
---
INSNS="LD LD4U ST ST4 BNEZ BEQZ BEQZT BGTZ CMPEQI CMPEQ CMOVEQZ CMOVNEZ"
FILES=$(find sysdeps/tile sysdeps/unix/sysv/linux/tile -iname *.S)
for insn in $INSNS; do
repl=$(echo $insn | tr '[:upper:]' '[:lower:]')
sed -i 's/\b'$insn'\b/'$repl'/g' $FILES
done
---
Checked with a build for tilegx-linux-gnu and tilegx-linux-gnu-32 with
and without the patch, there is no difference in generated binary with
a dissassemble.
* sysdeps/tile/__longjmp.S (__longjmp): Use lowercase instructions.
* sysdeps/tile/__tls_get_addr.S (__tls_get_addr): Likewise.
* sysdeps/tile/_mcount.S (__mcount): Likewise.
* sysdeps/tile/crti.S (_init, _fini): Likewise.
* sysdeps/tile/crtn.S: Likewise.
* sysdeps/tile/dl-start.S (_start): Likewise.
* sysdeps/tile/dl-trampoline.S: Likewise.
* sysdeps/tile/setjmp.S (__sigsetjmp): Likewise.
* sysdeps/tile/start.S (_start): Likewise.
* sysdeps/unix/sysv/linux/tile/clone.S (_clone): Likewise.
* sysdeps/unix/sysv/linux/tile/getcontext.S (__getcontext): Likewise.
* sysdeps/unix/sysv/linux/tile/ioctl.S (__ioctl): Likewise.
* sysdeps/unix/sysv/linux/tile/setcontext.S (__setcontext): Likewise.
* sysdeps/unix/sysv/linux/tile/swapcontext.S (__swapcontext): Likewise.
* sysdeps/unix/sysv/linux/tile/syscall.S (syscall): Likewise.
* sysdeps/unix/sysv/linux/tile/vfork.S (__vfork): Likewise.
With tilepro support removal we can now simplify internal tile support by
moving the directory structure to avoid the unnecessary directory levels
in tile/tilegx both on generic and linux folders.
Checked with a build for tilegx-linux-gnu and tilegx-linux-gnu-32 with
and without the patch, there is no difference in generated binary with
a dissassemble.
* stdlib/bug-getcontext.c (do_test): Remove tilepro mention in
comment.
* sysdeps/tile/preconfigure: Remove tilegx folder.
* sysdeps/tile/tilegx/Implies: Move definitions to ...
* sysdeps/tile/Implies: ... here.
* sysdeps/tile/tilegx/Makefile: Move rules to ...
* sysdeps/tile/Makefile: ... here.
* sysdeps/tile/tilegx/atomic-machine.h: Move definitions to ...
* sysdeps/tile/atomic-machine.h: ... here. Add include guards.
* sysdeps/tile/tilegx/bits/wordsize.h: Move to ...
* sysdeps/tile/bits/wordsize.h: ... here.
* sysdeps/tile/tilegx/*: Move to ...
* sysdeps/tile/*: ... here.
* sysdeps/tile/tilegx/tilegx32/Implies: Move to ...
* sysdeps/tile/tilegx32/Implies: ... here.
* sysdeps/tile/tilegx/tilegx64/Implies: Move to ...
* sysdeps/tile/tilegx64/Implies: ... here.
* sysdeps/unix/sysv/linux/tile/tilegx/Makefile: Move definitions
to ...
* sysdeps/unix/sysv/linux/tile/Makefile: ... here.
* sysdeps/unix/sysv/linux/tile/tilegx/*: Move to ...
* sysdeps/unix/sysv/linux/tile/*: ... here.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/*: Move to ...
* sysdeps/unix/sysv/linux/tile/tilegx32/*: ... here.
* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/*: Move to ...
* sysdeps/unix/sysv/linux/tile/tilegx64/*: ... here.
This patch consolidates the pthread_join and gnu extensions to avoid
code duplication. The function pthread_join, pthread_tryjoin_np, and
pthread_timedjoin_np are now based on pthread_timedjoin_ex.
It also fixes some inconsistencies on ESRCH, EINVAL, EDEADLK handling
(where each implementation differs from each other) and also on
clenup handler (which now always use a CAS).
Checked on i686-linux-gnu and x86_64-linux-gnu.
* nptl/pthreadP.h (__pthread_timedjoin_np): Define.
* nptl/pthread_join.c (pthread_join): Use __pthread_timedjoin_np.
* nptl/pthread_tryjoin.c (pthread_tryjoin): Likewise.
* nptl/pthread_timedjoin.c (cleanup): Use CAS on argument setting.
(pthread_timedjoin_np): Define internal symbol and common code from
pthread_join.
* sysdeps/unix/sysv/linux/i386/lowlevellock.h (__lll_timedwait_tid):
Remove superflous checks.
* sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (__lll_timedwait_tid):
Likewise.
Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
All binaries use TLS and thus need a properly set up TCB, so we can
simply return its address directly, instead of forwarding to the
libpthread implementation from libc.
For versioned symbols, the dynamic linker checks that the soname matches
the name supplied by the link editor, so a compatibility symbol in
libpthread is needed.
To avoid linking against the libpthread function in all cases, we would
have to bump the symbol version of libpthread in libc.so and supply a
compat symbol. This commit does not do that because the function
implementation is so small, so the overhead by two active copies of the
same function might well be smaller than the increase in symbol table
size.
In C++ mode, __MATH_TG cannot be used for defining iseqsig, because
__MATH_TG relies on __builtin_types_compatible_p, which is a C-only
builtin. This is true when float128 is provided as an ABI-distinct type
from long double.
Moreover, the comparison macros from ISO C take two floating-point
arguments, which need not have the same type. Choosing what underlying
function to call requires evaluating the formats of the arguments, then
selecting which is wider. The macro __MATH_EVAL_FMT2 provides this
information, however, only the type of the macro expansion is relevant
(actually evaluating the expression would be incorrect).
This patch provides a C++ version of iseqsig, in which only the type of
__MATH_EVAL_FMT2 (__typeof or decltype) is used as a template parameter
for __iseqsig_type. This function calls the appropriate underlying
function.
Tested for powerpc64le and x86_64.
[BZ #22377]
* math/Makefile [C++] (tests): Add test for iseqsig.
* math/math.h [C++] (iseqsig): New implementation, which does
not rely on __MATH_TG/__builtin_types_compatible_p.
* math/test-math-iseqsig.cc: New file.
* sysdeps/powerpc/powerpc64le/Makefile
(CFLAGS-test-math-iseqsig.cc): New variable.
