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f6b3331bbae6...
Paul Eggert
mktime: fix bug with Y2038 DST transition
[BZ#23789]
* time/mktime.c (ranged_convert): On 32-bit platforms, don’t
mishandle a DST transition that jumps over the Y2038 boundary.
No such DST transitions are known so this is only a theoretical
bug, but we might as well do things right.
f578f97b97c8...
Joseph Myers
Fix armv7 build with GCC 9.
Similar to the x86_64 build issues, glibc fails to build for armv7
with current mainline GCC because of aliases declared in the course of
defining IFUNCs, which copy their attributes from a header
declaration, ending up with fewer attributes than the (built-in)
string function they alias: the relevant attributes (nonnull, leaf)
are present on the header declaration, but elided therefrom when glibc
itself if being built (whatever the reasons are for disabling the
nonnull and leaf attributes in that case, and whether or not those
reasons are actually still valid).  This patch fixes the issue
similarly to the x86_64 fix, by adding an addition __attribute_copy__
use (in this case, on the definition of arm_libc_ifunc_hidden_def).

Tested with build-many-glibcs.py build for armeb-linux-gnueabi-be8.

* sysdeps/arm/arm-ifunc.h [SHARED] (arm_libc_ifunc_hidden_def):
Use __attribute_copy__ to copy attributes from name.
  • glibc-aarch64-linux: check (clobber) -  stdio
efbdddc381cf...
Paul Eggert
mktime: make more room for overflow
[BZ#23789]
* time/mktime.c (long_int): Now 4⨯ int, not just 3⨯.
This is so that we can add tm_diff results to a previous guess,
which will be useful in a later patch.
e5de3b5b72af...
Joseph Myers
Remove __ASSUME_SOCKETCALL.
The __ASSUME_SOCKETCALL macro in kernel-features.h is no longer used
for anything.  (It used to be used in defining other macros related to
accept4 / recvmmsg / sendmmsg availability, but the code in that area
was simplified once we could assume a kernel with those features,
whether through a syscall or through socketcall, so allowing those
functions to be handled much like other socket operations, without
requring __ASSUME_SOCKETCALL.)  This patch removes that unused macro.

(Note: once we can assume a Linux 4.4 or later kernel, much of the
support for using socketcall at all can be removed from glibc,
although a few functions may need that support in glibc for longer.)

Tested with build-many-glibcs.py.

* sysdeps/unix/sysv/linux/kernel-features.h: Remove comment about
__ASSUME_SOCKETCALL.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_SOCKETCALL): Remove.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_SOCKETCALL): Likewise.
* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
(__ASSUME_SOCKETCALL): Likewise.
* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
(__ASSUME_SOCKETCALL): Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_SOCKETCALL): Likewise.
* sysdeps/unix/sysv/linux/sh/kernel-features.h
(__ASSUME_SOCKETCALL): Likewise.
* sysdeps/unix/sysv/linux/sparc/kernel-features.h
(__ASSUME_SOCKETCALL): Likewise.
e143ceba564a...
Joseph Myers
Correct SH kernel-features.h undefines (bug 23862).
The SH kernel-features.h undefines __ASSUME_RENAMEAT2 for kernel
versions before 4.8, but fails to undefine __ASSUME_EXECVEAT,
__ASSUME_MLOCK2 and __ASSUME_COPY_FILE_RANGE, although all those
syscalls (and several others) were added for SH in the same Linux
kernel commit (first released in 4.8).  This patch adds the proper
undefines of those macros.

Tested with build-many-glibcs.py for its SH configurations.

[BZ #23862]
* sysdeps/unix/sysv/linux/sh/kernel-features.h
[__LINUX_KERNEL_VERSION < 0x040800] (__ASSUME_EXECVEAT): Undefine.
[__LINUX_KERNEL_VERSION < 0x040800] (__ASSUME_MLOCK2): Likewise.
[__LINUX_KERNEL_VERSION < 0x040800] (__ASSUME_COPY_FILE_RANGE):
Likewise.
de20b81a038f...
Paul Eggert
mktime: fix EOVERFLOW bug
[BZ#23789]
* time/mktime.c [!_LIBC && !DEBUG_MKTIME]:
Include libc-config.h, not config.h, for __set_errno.
(guess_time_tm, __mktime_internal): Set errno to EOVERFLOW on overflow.
d524fa6c35e6...
H.J. Lu
Check multiple NT_GNU_PROPERTY_TYPE_0 notes [BZ #23509]
Linkers group input note sections with the same name into one output
note section with the same name.  One output note section is placed in
one PT_NOTE segment.  Since new linkers merge input .note.gnu.property
sections into one output .note.gnu.property section, there is only
one NT_GNU_PROPERTY_TYPE_0 note in one PT_NOTE segment with new linkers.
Since older linkers treat input .note.gnu.property section as a generic
note section and just concatenate all input .note.gnu.property sections
into one output .note.gnu.property section without merging them, we may
see multiple NT_GNU_PROPERTY_TYPE_0 notes in one PT_NOTE segment with
older linkers.

When an older linker is used to created the program on CET-enabled OS,
the linker output has a single .note.gnu.property section with multiple
NT_GNU_PROPERTY_TYPE_0 notes, some of which have IBT and SHSTK enable
bits set even if the program isn't CET enabled.  Such programs will
crash on CET-enabled machines.  This patch updates the note parser:

1. Skip note parsing if a NT_GNU_PROPERTY_TYPE_0 note has been processed.
2. Check multiple NT_GNU_PROPERTY_TYPE_0 notes.

[BZ #23509]
* sysdeps/x86/dl-prop.h (_dl_process_cet_property_note): Skip
note parsing if a NT_GNU_PROPERTY_TYPE_0 note has been processed.
Update the l_cet field when processing NT_GNU_PROPERTY_TYPE_0 note.
Check multiple NT_GNU_PROPERTY_TYPE_0 notes.
* sysdeps/x86/link_map.h (l_cet): Expand to 3 bits,  Add
lc_unknown.
c75772e3f079...
Zack Weinberg
Use STRFMON_LDBL_IS_DBL instead of __ldbl_is_dbl.
On platforms where long double used to have the same format as double,
but later switched to a different format (alpha, s390, sparc, and
powerpc), accessing the older behavior is possible and it happens via
__nldbl_* functions (not on the API, but accessible from header
redirection and from compat symbols).  These functions write to the
global flag __ldbl_is_dbl, which tells other functions that long double
variables should be handled as double.  This patch takes the first step
towards removing this global flag and creates __vstrfmon_l_internal,
which takes an explicit flags parameter.

This change arguably makes the generated code slightly worse on
architectures where __ldbl_is_dbl is never true; right now, on those
architectures, it's a compile-time constant; after this change, the
compiler could theoretically prove that __vstrfmon_l_internal was
never called with a nonzero flags argument, but it would probably need
LTO to do it.  This is not performance critical code and I tend to
think that the maintainability benefits of removing action at a
distance are worth it.  However, we _could_ wrap the runtime flag
check with a macro that was defined to ignore its argument and always
return false on architectures where __ldbl_is_dbl is never true, if
people think the codegen benefits are important.

Tested for powerpc and powerpc64le.
c3ec097256a1...
Joseph Myers
Replace conformtest.pl with conformtest.py.
Continuing the consolidation on Python for various miscellaneous build
and test scripts, this patch moves conformtest from Perl to Python.

The substance of the tests run is intended to be the same as before,
except that the previous test for tags did not actually achieve the
intended purpose of verifying whether a tag was already declared, so
is changed to one that would actually fail for a tag that wasn't
declared, and a typo in the old test for variables being available
($xyzzy instead of xyzzy) would have made that test not use the
correct type (but it would have passed anyway with warnings).  No
attempt is made to keep the details of what the test output looks
like; instead, tests are given names which are made to follow PASS: /
FAIL: / XFAIL: / SKIP: / MISSING: as appropriate.

In the new version, there is more consistent parsing of test lines
(into a series of words, either surrounded by {} or separated by
spaces) that applies for all kinds of test lines, rather than the old
approach of different regular expressions for every kind of test.  A
few of the conform/data/ files are adjusted so their syntax works with
the new script (which now requires spaces in certain cases where the
old script tolerated them being missing, and does not allow stray
semicolons at the end of "function" lines).  Similarly, common logic
is used around what happens with a second subtest if a first one fails
(e.g., a test for a symbol's type if the test for availability fails),
rather than such logic being replicated separately for each kind of
test.  Common parsing also applies for test lines both when they are
lines for the header under test and when they are lines for another
header specified with allow-header, again unlike the old script.

Tested for x86_64, and with build-many-glibcs.py.

* conform/conformtest.py: New file.
* conform/conformtest.pl: Remove.
* conform/GlibcConform.pm: Likewise.
* conform/glibcconform.py (KEYWORDS_C90): New constant.
(KEYWORDS_C99): Likewise.
(KEYWORDS): Likewise.
* conform/Makefile ($(conformtest-header-tests)): Use
conformtest.py instead of conformtest.pl.  Do not pass --tmpdir
option.  Use --header instead of --headers.
* conform/data/arpa/inet.h-data: Remove trailing semicolons on
function entries.
* conform/data/spawn.h-data: Likewise.
* conform/data/fcntl.h-data (openat): Add space after function
name.
* conform/data/wchar.h-data (wcscasecmp): Likewise.
(wcscasecmp_l): Likewise.
* conform/data/termios.h-data (c_cc): Add space after element
name.
ac8060265bca...
Alexandra Hájková
Add an additional test to resolv/tst-resolv-network.c
Test for the infinite loop in getnetbyname, bug #17630.
9c4b457e1b47...
Joseph Myers
Add hidden_tls_def macros, fix powerpc-soft build with GCC 9.
Soft-float powerpc fails to build with current GCC mainline because of
use of libc_hidden_data_def for TLS variables, resulting in a non-TLS
alias being defined, to which the tls_model attribute is now copied,
resulting in a warning about it being ignored.

The problem here appears to be the non-TLS alias.  This patch adds a
hidden_tls_def macro family, corresponding to the hidden_tls_proto
macros, to define TLS aliases properly in such a case, and uses it for
those powerpc soft-float variables.

Tested with build-many-glibcs.py compilers build for powerpc-linux-gnu
soft-float.  Also tested for x86_64.

* include/libc-symbols.h [SHARED && !NO_HIDDEN && !__ASSEMBLER__]
(__hidden_ver2): New macro.  Use old definition of __hidden_ver1
with additional parameter thread.
[SHARED && !NO_HIDDEN && !__ASSEMBLER__] (__hidden_ver1): Define
in terms of __hidden_ver2.
(hidden_tls_def): New macro.
(libc_hidden_tls_def): Likewise.
(rtld_hidden_tls_def): Likewise.
(libm_hidden_tls_def): Likewise.
(libmvec_hidden_tls_def): Likewise.
(libresolv_hidden_tls_def): Likewise.
(librt_hidden_tls_def): Likewise.
(libdl_hidden_tls_def): Likewise.
(libnss_files_hidden_tls_def): Likewise.
(libnsl_hidden_tls_def): Likewise.
(libnss_nisplus_hidden_tls_def): Likewise.
(libutil_hidden_tls_def): Likewise.
(libutil_hidden_tls_def): Likweise.
* sysdeps/powerpc/nofpu/sim-full.c (__sim_exceptions_thread): Use
libc_hidden_tls_def.
(__sim_disabled_exceptions_thread): Likewise.
(__sim_round_mode_thread): Likewise.
9a7c643ac2c2...
Joseph Myers
Fix i686 build with GCC 9.
This patch fixes the glibc build for i686 with current mainline GCC,
where there are warnings about inconsistent attributes for aliases in
certain files defining libm IFUNCs.

In three of the files, the aliases were defined in terms of internal
symbols such as __sinf, and copied attributes from file-local
declarations of those functions which lacked the nothrow attribute.
Since the nothrow attribute is present on the declarations from
<math.h> (which include declarations of those __-prefixed functions),
the natural fix was to include <math.h> in those files, replacing the
local declarations.

In the other three files, a more complicated __hidden_ver1 call was
involved in the warnings.  <math.h> has not been included at this
point and, furthermore, it is included indirectly only later in the
source file after macros have been defined to remap a function name
therein.  So there isn't an obvious declaration from which to copy the
attribute and it seems simplest and safest just to add __THROW to the
hidden_ver1 calls.

Tested for i686 (build-many-glibcs.py compilers build for
x86_64-linux-gnu with GCC mainline; full testsuite run with GCC 7).

* sysdeps/i386/i686/fpu/multiarch/e_expf.c [SHARED]: Use __THROW
with __hidden_ver1 call.
* sysdeps/i386/i686/fpu/multiarch/e_log2f.c [SHARED]: Likewise.
* sysdeps/i386/i686/fpu/multiarch/e_logf.c [SHARED]: Likewise.
* sysdeps/i386/i686/fpu/multiarch/s_cosf.c: Include <math.h>.
(__cosf): Do not declare here.
* sysdeps/i386/i686/fpu/multiarch/s_sincosf.c: Include <math.h>.
(__sincosf): Do not declare here.
* sysdeps/i386/i686/fpu/multiarch/s_sinf.c: Include <math.h>.
(__sinf): Do not declare here.
9771e6cb5102...
Gabriel F. T. Gomes
Add test for warn, warnx, vwarn, and vwarnx with floating-point parameters
Similarly to what has been done for argp_error and argp_failure, this
patch patch adds new tests for the warn, warnx, vwarn, and vwarnx
functions.  The new tests use the format string to request the
conversion of long double parameters into string.  Currently, these
tests only check that the default format of the long double type works.
Future patches will extend the test for platforms that can have an
optional format for long double.

Tested for powerpc64le.

* misc/Makefile (tests): Add tst-ldbl-warn.
* misc/tst-ldbl-warn.c: New file.
  • glibc-aarch64-linux: check -  stdio
968ed5301d09...
Gabriel F. T. Gomes
Convert tst-efgcvt to the new test framework
The function do_test, in tst-efgcvt.c, increments an error counter for
each error that it finds, then returns it to the test framework.
However, the test framework does not expect an error count as return,
but zero for a passing test, one for a failing test, or 77 for an
unsupported test.  Alternatively, the framework provides the function
support_record_failure that records errors, which then allows the test
program to return zero unconditionally.

This patch removes the error counter, replaces each increment of the
counter with a call to support_record_failure, and makes do_test
unconditionally return zero.

Tested for powerpc64le (as-is and with a patched results table to check
that the error reporting actually works).

* misc/tst-efgcvt.c: Include support/check.h and
support/test-driver.c.  Do not include test-skeleton.c.
(error_count): Remove.
(output_error): Replace increments to error_count with calls to
support_record_failure.
(output_r_error): Likewise.
(special): Likewise.
(do_test): Unconditionally return zero.
(TEST_FUNCTION): Remove.
91faaa93a5bb...
Joseph Myers
Update conform/Makefile mkdir commands.
conform/Makefile creates $(@D)/scratch for the per-standard per-header
tests.  That directory was formerly used by the Perl scripts for
temporary files, but the Python implementations use
tempfile.TemporaryDirectory to get such files cleaned up
automatically.  This patch changes the Makefile to create only $(@D)
(required for the output redirection to work), not the scratch
subdirectory.

Tested for x86_64.

* conform/Makefile ($(conformtest-header-tests)): Create $(@D),
not $(@D)/scratch.
($(linknamespace-header-tests)): Likewise.
  • glibc-aarch64-linux: check -  stdio
  • glibc-s390x-linux: check (clobber) -  stdio
8c6c3fb0bceb...
Samuel Thibault
hurd: Fix build with GCC 9
* sysdeps/mach/hurd/dl-sysdep.c (check_no_hidden): Use
__attribute_copy__ to copy attributes from name. Drop static qualifier
to avoid warnings about leaf attribute not having effect on static
functions.
  • glibc-aarch64-linux: check -  stdio
88b26b7e9126...
Samuel Thibault
Hurd: export _hurd_port_move
* hurd/Versions (_hurd_port_move): Export function.
* sysdeps/mach/hurd/i386/libc.abilist (_hurd_port_move): Expect
symbol.
  • glibc-aarch64-linux: check (clobber) -  stdio
86aece3bfbd4...
Paul Eggert
mktime: fix non-EOVERFLOW errno handling
[BZ#23789]
mktime was not properly reporting failures when the underlying
localtime_r fails with errno != EOVERFLOW; it incorrectly treated
them like EOVERFLOW failures, and set errno to EOVERFLOW.
The problem could happen on non-glibc platforms, with Gnulib.
* time/mktime.c (guess_time_tm): Remove, replacing with ...
(tm_diff): ... this simpler function, which does not change errno.
All callers changed to deal with errno themselves.
(ranged_convert, __mktime_internal): Return failure immediately if
the underlying function reports any failure other than EOVERFLOW.
(__mktime_internal): Set errno to EOVERFLOW if the spring-forward
gap code fails.
7fa495cdf750...
Samuel Thibault
Hurd: Fix ulinks in fd table reallocation
* hurd/hurd/userlink.h (_hurd_userlink_move): New function.
* hurd/hurd/port.h (_hurd_port_move): New function.
* sysdeps/mach/hurd/spawni.c (NEW_ULINK_TABLE): New macro.
(EXPAND_DTABLE): Use NEW_ULINK_TABLE macro for ulink_dtable.
7597b0c7f711...
Gabriel F. T. Gomes
Add tests with floating-point arguments for err* and verr* functions
Similarly to what has been done for argp_error, and argp_failure, as
well as for warn, warnx, vwarn, and vwarnx, this patch adds new tests
for the following functions: err, errx, verr, verrx, error, and
error_at_line.  The new tests check that the conversion of long double
variables into string works correctly on the default format of the type.
Future patches will reuse these tests for other formats that long double
can take.

Tested for powerpc64le.

* misc/Makefile (tests): Add tst-ldbl-error.
* misc/tst-ldbl-error.c: New file.
  • glibc-aarch64-linux: check -  stdio
6c90d759f613...
Paul Eggert
mktime: simplify offset guess
[BZ#23789]
* time/mktime.c (__mktime_internal): Omit excess precision.
6923f6db1e68...
Florian Weimer
malloc: Use current (C11-style) atomics for fastbin access
5d8af1566bd9...
Paul Eggert
mktime: DEBUG_MKTIME cleanup
The DEBUG_MKTIME code no longer works in glibc or in Gnulib.
And it’s no longer needed now that glibc and Gnulib both have
their own testing mechanisms for mktime.
* time/mktime.c (DEBUG_MKTIME): Remove.  All uses removed.
596cc360aa9f...
Joseph Myers
Fix __ASSUME_MLOCK2 for ARM, MicroBlaze (bug 23867).
The generic kernel-features.h defines __ASSUME_MLOCK2 for 4.4 and
later kernels.  However, for 32-bit ARM binaries running on 64-bit ARM
kernels, and for MicroBlaze, the syscall was only wired up in the 4.7
kernel.  (32-bit ARM kernels did have the syscall from 4.4 onwards.)
This patch duly arranges for the macro to be undefined for those
architectures for kernels before 4.7.

Tested with build-many-glibcs.py for its ARM and MicroBlaze
configurations.

[BZ #23867]
* sysdeps/unix/sysv/linux/arm/kernel-features.h
[__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_MLOCK2): Undefine.
* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
[__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_MLOCK2): Undefine.
58bb655acb3a...
Samuel Thibault
hurd: Document dtable_cloexec size convention.
* sysdeps/mach/hurd/spawni.c (__spawni): Use orig_dtablesize instead
of dtablesize for allocating dtable_cloexec.
53f5c65914b7...
Joseph Myers
Fix sparc64 build with GCC 9.
Similar to the x86_64 and armv7 build issues, glibc fails to build for
sparc64 with current mainline GCC because of aliases declared in the
course of defining IFUNCs, which copy their attributes from a header
declaration, ending up with fewer attributes than the (built-in)
string function they alias.  This patch fixes the issue similarly to
the fixes for those other architectures.

Tested with build-many-glibcs.py compilers build for
sparc64-linux-gnu.

* sysdeps/sparc/sparc-ifunc.h [SHARED]
(sparc_ifunc_redirected_hidden_def): Use __attribute_copy__ to
copy attributes from name.
4a938cb273e1...
Florian Weimer
posix: New function posix_spawn_file_actions_addchdir_np [BZ #17405]
434c34bd8e3f...
Samuel Thibault
Hurd: Implement chdir support in posix_spawn
This fixes build-many-glibcs.py on i686-gnu.

Thanks Florian Weimer for the initial version.

* sysdeps/mach/hurd/spawni.c (__spawni): Add ccwdir port. Test and use
it, free it if needed.
(reauthenticate): Test and use ccwdir.
(child_init_port): In non-resetids case, test and use ccwdir.
(child_chdir): New nested function to set ccwdir.
43257c335ad6...
Gabriel F. T. Gomes
Use TEST_COMPARE_STRING in recently added test
The commit

commit 1df872fd74f730bcae3df201a229195445d2e18a
Author: Florian Weimer <fweimer@redhat.com>
Date:  Wed Nov 7 12:42:44 2018 +0100

    support: Implement TEST_COMPARE_STRING

added the new macro TEST_COMPARE_STRING, which compares the output of
functions under test against expected strings, and, when there's a
mismatch, automatically reports an error and prints the differences.
This patch adapts recently added test cases to use this new macro.

Tested for powerpc64le (as is, and locally patched to intentionally fail
and produce error output).

* argp/tst-ldbl-argp.c (do_one_test): Use TEST_COMPARE_STRING,
instead of manually comparing and reporting mismatching strings.
* misc/tst-ldbl-error.c (do_one_test): Likewise.
* misc/tst-ldbl-warn.c (do_one_test): Likewise.
  • glibc-aarch64-linux: check (clobber) -  stdio
  • glibc-s390x-linux: check -  stdio
346ef23f197a...
Samuel Thibault
hurd: Fix F_*LK* fcntl with __USE_FILE_OFFSET64
struct flock64 uses 64bit values. This introduces other values for F_GETLK,
F_SETLK, F_SETLKW to distinguish between both.

* sysdeps/mach/hurd/bits/fcntl.h (F_GETLK64, F_SETLK64, F_SETLKW64): New
macros
[__USE_FILE_OFFSET64] (F_GETLK, F_SETLK, F_SETLKW): Define to F_GETLK64,
F_SETLK64, F_SETLKW64, respectively.
* sysdeps/mach/hurd/f_setlk.c: New file.
* sysdeps/mach/hurd/f_setlk.h: New file.
* sysdeps/mach/hurd/Makefile [$(subdir) = io] (sysdeps_routines): Add
f_setlk.
* sysdeps/mach/hurd/fcntl.c: Include "f_setlk.h".h".
(__libc_fcntl): Move non-flock operations to...
* sysdeps/mach/hurd/vfcntl.c (__libc_vfcntl): ... New file.
* sysdeps/mach/hurd/fcntl.c (fcntl64): Add missing alias.
  • glibc-s390x-linux: check (clobber) -  stdio
32c12f3f7ac9...
Paul Eggert
mktime: new test for mktime failure
[BZ#23789]
Based on a test suggested by Albert Aribaud in:
https://www.sourceware.org/ml/libc-alpha/2018-10/msg00662.html
* time/Makefile (tests): Add bug-mktime4.
* time/bug-mktime4.c: New file.
2c03961fce92...
Gabriel F. T. Gomes
Add tests for argp_error and argp_failure with floating-point parameters
The functions argp_error and argp_failure, from argp.h, have a format
string as parameter, which can possibly request the printing of
floating-point values.  These values could be of long double type, which
can have different formats, depending on the architecture and on
compilation parameters (for instance, on powerpc, long double values can
have double format (-mlong-double-64) or IBM Extended Precision format
(-mlong-double-128)).

This patch adds tests for argp_error and argp_failure that contain a
format string with double and long double conversion specifiers ('%f'
and '%Lf').  These tests automatically check that the default format of
the long double type works.  A future patch will extend the test for
platforms that can have an optional format for long double.

Tested for powerpc64le.

* argp/Makefile (tests): Add tst-ldbl-argp.
* argp/tst-ldbl-argp.c: New file.
  • glibc-aarch64-linux: check -  stdio
295132ff052b...
Andreas Schwab
RISC-V: don't assume PI mutexes and robust futexes before 4.20 (bug 23864)
Support for futex_cmpxchg as only been added to 4.20-rc1.
278fdabd8c45...
Samuel Thibault
hurd: Fix spawni's user_link reallocation
* hurd/hurd/userlink.h (_hurd_userlink_move): Make new_link's
predecessor point to new_link instead of link.
1ecba1fafc16...
Florian Weimer
malloc: Convert the unlink macro to the unlink_chunk function
This commit is in preparation of turning the macro into a proper
function.  The output arguments of the macro were in fact unused.

Also clean up uses of __builtin_expect.
1df872fd74f7...
Florian Weimer
support: Implement TEST_COMPARE_STRING
  • glibc-aarch64-linux: check -  stdio
1626a1cfcd6b...
Martin Sebor
Add support for GCC 9 attribute copy.
GCC 9 has gained an enhancement to help detect attribute mismatches
between alias declarations and their targets.  It consists of a new
warning, -Wattribute-alias, an enhancement to an existing warning,
-Wmissing-attributes, and a new attribute called copy.

The purpose of the warnings is to help identify either possible bugs
(an alias declared with more restrictive attributes than its target
promises) or optimization or diagnostic opportunities (an alias target
missing some attributes that it could be declared with that might
benefit analysis and code generation).  The purpose of the new
attribute is to easily apply (almost) the same set of attributes
to one declaration as those already present on another.

As expected (and intended) the enhancement triggers warnings for
many alias declarations in Glibc code.  This change, tested on
x86_64-linux, avoids all instances of the new warnings by making
use of the attribute where appropriate.  To fully benefit from
the enhancement Glibc will need to be compiled with
-Wattribute-alias=2 and remaining warnings reviewed and dealt with
(there are a couple of thousand but most should be straightforward
to deal with).

ChangeLog:

* include/libc-symbols.h (__attribute_copy__): Define macro unless
it's already defined.
(_strong_alias): Use __attribute_copy__.
(_weak_alias,  __hidden_ver1,  __hidden_nolink2): Same.
* misc/sys/cdefs.h (__attribute_copy__): New macro.
* sysdeps/x86_64/multiarch/memchr.c (memchr): Use __attribute_copy__.
* sysdeps/x86_64/multiarch/memcmp.c (memcmp): Same.
* sysdeps/x86_64/multiarch/mempcpy.c (mempcpy): Same.
* sysdeps/x86_64/multiarch/memset.c (memset): Same.
* sysdeps/x86_64/multiarch/stpcpy.c (stpcpy): Same.
* sysdeps/x86_64/multiarch/strcat.c (strcat): Same.
* sysdeps/x86_64/multiarch/strchr.c (strchr): Same.
* sysdeps/x86_64/multiarch/strcmp.c (strcmp): Same.
* sysdeps/x86_64/multiarch/strcpy.c (strcpy): Same.
* sysdeps/x86_64/multiarch/strcspn.c (strcspn): Same.
* sysdeps/x86_64/multiarch/strlen.c (strlen): Same.
* sysdeps/x86_64/multiarch/strncmp.c (strncmp): Same.
* sysdeps/x86_64/multiarch/strncpy.c (strncpy): Same.
* sysdeps/x86_64/multiarch/strnlen.c (strnlen): Same.
* sysdeps/x86_64/multiarch/strpbrk.c (strpbrk): Same.
* sysdeps/x86_64/multiarch/strrchr.c (strrchr): Same.
* sysdeps/x86_64/multiarch/strspn.c (strspn): Same.
0c096dcf14df...
Joseph Myers
Fix mips build with GCC 9.
This patch fixes the build for MIPS (o32) with GCC 9 by stopping MIPS
__longjmp from using strong_alias, instead defining the alias
manually, so that the intended effect of not copying the nomips16
attribute is achieved, as explained in the included comment.

Tested with build-many-glibcs.py compilers build for mips64-linux-gnu
(which includes glibc builds for all three ABIs).

* sysdeps/mips/__longjmp.c (__longjmp): Define alias manually with
alias attribute, not with strong_alias.
092dfde68f7d...
Joseph Myers
Remove redundant macro definitions from ia64 sfp-machine.h.
After the changes to use the copy attribute, building glibc for ia64
fails, even with older compilers, because
sysdeps/ia64/fpu/sfp-machine.h has a definition of _strong_alias that
now differs from the one in libc-symbols.h.

That definition is a relic of this file coming from libgcc, as are
some other such macro definitions in this file; in the glibc context,
there is no need for those macros, and this patch removes them to fix
the build.

Tested with build-many-glibcs.py for ia64-linux-gnu.

* sysdeps/ia64/fpu/sfp-machine.h (__LITTLE_ENDIAN): Remove.
(__BIG_ENDIAN): Likewise.
(__BYTE_ORDER): Likewise.
(strong_alias): Likewise.
(_strong_alias): Likewise.
00c86a37d1b6...
Adhemerval Zanella
support: Fix printf format for TEST_COMPARE_STRING
Fix the following on 32 bits targets:

support_test_compare_string.c: In function ‘support_test_compare_string’:
support_test_compare_string.c:80:37: error: format ‘%lu’ expects argument of
type ‘long unsigned int’, but argument 2 has type ‘size_t’ {aka ‘unsigned int’}
[-Werror=format=]
        printf ("  string length: %lu bytes\n", left_length);
                                  ~~^          ~~~~~~~~~~~
                                  %u
Checked on arm-linux-gnueabihf.

* support/support_test_compare_string.c
(support_test_compare_string): Fix printf format.