When building on GNU/Hurd the following warnings repeat themselves:
../Rules:400: target '/home/collin/obj/glibc/io/test-lfs.out' given more than once in the same rule
../Rules:400: target '/home/collin/obj/glibc/io/test-lfs.out' given more than once in the same rule
This is because commit 73b854e955 (hurd: Mark more memory-hungry tests
as unsupported, 2025-01-12) added it to 'tests-unsupported' even though
it was already added by decf02d382 (hurd: Mark two tests as unsupported,
2023-04-13).
Message-ID: <54dc6bf7e0dbedb1b19356f41fec843c1c523b11.1750130025.git.collin.funk1@gmail.com>
Add an explicitly numeric interface for baudrate setting. For glibc,
this only announces what is a fair accompli, but this is a plausible
way forward for standardization, and may be possible to infill on
non-compliant systems. The POSIX committee has stated:
[https://www.austingroupbugs.net/view.php?id=1916#c7135]
A future version of this standard is expected to add at least
the following symbolic constants for use as values of objects
of type speed_t: B57600, B115200, B230400, B460800, and
B921600.
Implementations are encouraged to propose additional
interfaces which will make it possible to set and query a
wider range of speeds than just those enumerated by the
constants beginning with B. If a set of common interfaces
emerges between several implementations, a future version of
this standard will likely add those interfaces.
This is exactly that interface.
The use of the term "baud" is due to the need to have a term
contrasting "speed", and it is already well established as a legacy
term -- including in the names of the legacy Bxxx
constants. Futhermore, it *is* valid from the point of view that the
termios interface fundamentally emulates an RS-232 serial port as far
as the application software is concerned.
The documentation states that for the current version of glibc,
speed_t == baud_t, but explicitly declares that this may not be the
case in the future.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Hurd with USE_OLD_TTY was the only remaining platform with speed_t not
containing a proper baud rate. From the looks of it, that code has
long since bitrotted.
Remove the vestiges of USE_OLD_TTY.
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
25d37948c9 ("malloc: Improve malloc initialization") moved calling malloc
initialization earlier, within _dl_sysdep_start's call to dl_main, before
__mach_init is called by _dl_init_first. But malloc initialization uses
getrandom, which needs to make RPCs.
This adds __getrandom_early_init on hurd to express that getrandom needs
__mach_init too. This also adds a guard to avoid making it create several task
and host ports.
Fixes: 25d37948c9 ("malloc: Improve malloc initialization")
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
C23 adds various <math.h> function families originally defined in TS
18661-4. Add the rootn functions, which compute the Yth root of X for
integer Y (with a domain error if Y is 0, even if X is a NaN). The
integer exponent has type long long int in C23; it was intmax_t in TS
18661-4, and as with other interfaces changed after their initial
appearance in the TS, I don't think we need to support the original
version of the interface.
As with pown and compoundn, I strongly encourage searching for worst
cases for ulps error for these implementations (necessarily
non-exhaustively, given the size of the input space). I also expect a
custom implementation for a given format could be much faster as well
as more accurate, although the implementation is simpler than those
for pown and compoundn.
This completes adding to glibc those TS 18661-4 functions (ignoring
DFP) that are included in C23. See
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118592 regarding the C23
mathematical functions (not just the TS 18661-4 ones) missing built-in
functions in GCC, where such functions might usefully be added.
Tested for x86_64 and x86, and with build-many-glibcs.py.
C23 adds various <math.h> function families originally defined in TS
18661-4. Add the compoundn functions, which compute (1+X) to the
power Y for integer Y (and X at least -1). The integer exponent has
type long long int in C23; it was intmax_t in TS 18661-4, and as with
other interfaces changed after their initial appearance in the TS, I
don't think we need to support the original version of the interface.
Note that these functions are "compoundn" with a trailing "n", *not*
"compound" (CORE-MATH has the wrong name, for example).
As with pown, I strongly encourage searching for worst cases for ulps
error for these implementations (necessarily non-exhaustively, given
the size of the input space). I also expect a custom implementation
for a given format could be much faster as well as more accurate (I
haven't tested or benchmarked the CORE-MATH implementation for
binary32); this is one of the more complicated and less efficient
functions to implement in a type-generic way.
As with exp2m1 and exp10m1, this showed up places where the
powerpc64le IFUNC setup is not as self-contained as one might hope (in
this case, without the changes specific to powerpc64le, there were
undefined references to __GI___expf128).
Tested for x86_64 and x86, and with build-many-glibcs.py.
The BZ 32653 fix (12a497c716) kept the
stack pointer zeroing from make_main_stack_executable on
_dl_make_stack_executable. However, previously the 'stack_endp'
pointed to temporary variable created before the call of
_dl_map_object_from_fd; while now we use the __libc_stack_end
directly.
Since pthread_getattr_np relies on correct __libc_stack_end, if
_dl_make_stack_executable is called (for instance, when
glibc.rtld.execstack=2 is set) __libc_stack_end will be set to zero,
and the call will always fail.
The __libc_stack_end zero was used a mitigation hardening, but since
52a01100ad it is used solely on
pthread_getattr_np code. So there is no point in zeroing anymore.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Reviewed-by: Sam James <sam@gentoo.org>
8ef1791950 ("hurd: Fix EINVAL error on linking to a slash-trailing path
[BZ #32569]) made symlink return ENOTDIR, but the gnulib testsuite does
not recognize it for such a situation, and EEXIST is indeed more
comprehensible to users.
This avoids SIGFPE handlers (or code longjmp-ed to) getting disturbed by the
exception that generated it.
Note: gcc's unwinding depends on the rpc_wait_trampoline/trampoline exact
code, so we here avoid breaking it.
If the process has never used fp before getting a signal, xstate is set
(and thus the x87 state is not initialized) but xstate->initialized is still
0, and we should not restore anything.
* hurd/Makefile: add new tests
* hurd/test-sig-rpc-interrupted.c: check xstate save and restore in
the case where a signal is delivered to a thread which is waiting
for an rpc. This test implements the rpc interruption protocol used
by the hurd servers. It was so far passing on Debian thanks to the
local-intr-msg-clobber.diff patch, which is now obsolete.
* hurd/test-sig-xstate.c: check xstate save and restore in the case
where a signal is delivered to a running thread, making sure that
the xstate is modified in the signal handler.
* hurd/test-xstate.h: add helpers to test xstate
* sysdeps/mach/hurd/i386/bits/sigcontext.h: add xstate to the
sigcontext structure.
+ sysdeps/mach/hurd/i386/sigreturn.c: restore xstate from the saved
context
* sysdeps/mach/hurd/x86/trampoline.c: save xstate if
supported. Otherwise we fall back to the previous behaviour of
ignoring xstate.
* sysdeps/mach/hurd/x86_64/bits/sigcontext.h: add xstate to the
sigcontext structure.
* sysdeps/mach/hurd/x86_64/sigreturn.c: restore xstate from the saved
context
Signed-off-by: Luca Dariz <luca@orpolo.org>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Message-ID: <20250319171118.142163-1-luca@orpolo.org>
C2Y adds unsigned versions of the abs functions (see C2Y draft N3467 and
proposal N3349).
Tested for x86_64.
Signed-off-by: Lenard Mollenkopf <glibc@lenardmollenkopf.de>
If the input buffer exceeds the stack auxiliary buffer, qsort will
malloc a temporary one to call mergesort. Since C++ standard does
allow the callback comparison function to throw [1], the glibc
implementation can potentially leak memory.
The fixes uses a pthread_cleanup_combined_push and
pthread_cleanup_combined_pop, so it can work with and without
exception enables. The qsort code path that calls malloc now
requires some extra setup and a call to __pthread_cleanup_push
anmd __pthread_cleanup_pop (which should be ok since they just
setup some buffer state).
Checked on x86_64-linux-gnu.
[1] https://timsong-cpp.github.io/cppwp/n4950/alg.c.library#4
Reviewed-by: DJ Delorie <dj@redhat.com>
C23 adds various <math.h> function families originally defined in TS
18661-4. Add the pown functions, which are like pow but with an
integer exponent. That exponent has type long long int in C23; it was
intmax_t in TS 18661-4, and as with other interfaces changed after
their initial appearance in the TS, I don't think we need to support
the original version of the interface. The test inputs are based on
the subset of test inputs for pow that use integer exponents that fit
in long long.
As the first such template implementation that saves and restores the
rounding mode internally (to avoid possible issues with directed
rounding and intermediate overflows or underflows in the wrong
rounding mode), support also needed to be added for using
SET_RESTORE_ROUND* in such template function implementations. This
required math-type-macros-float128.h to include <fenv_private.h>, so
it can tell whether SET_RESTORE_ROUNDF128 is defined. In turn, the
include order with <fenv_private.h> included before <math_private.h>
broke loongarch builds, showing up that
sysdeps/loongarch/math_private.h is really a fenv_private.h file
(maybe implemented internally before the consistent split of those
headers in 2018?) and needed to be renamed to fenv_private.h to avoid
errors with duplicate macro definitions if <math_private.h> is
included after <fenv_private.h>.
The underlying implementation uses __ieee754_pow functions (called
more than once in some cases, where the exponent does not fit in the
floating type). I expect a custom implementation for a given format,
that only handles integer exponents but handles larger exponents
directly, could be faster and more accurate in some cases.
I encourage searching for worst cases for ulps error for these
implementations (necessarily non-exhaustively, given the size of the
input space).
Tested for x86_64 and x86, and with build-many-glibcs.py.
Add function __inet_pton_chk which calls __chk_fail when the size of
argument dst is too small. inet_pton is redirected to __inet_pton_chk
or __inet_pton_warn when _FORTIFY_SOURCE is > 0.
Also add tests to debug/tst-fortify.c, update the abilist with
__inet_pton_chk and mention inet_pton fortification in maint.texi.
Co-authored-by: Frédéric Bérat <fberat@redhat.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
On both Linux and Hurd the __eloop_threshold() is always a constant
(40 and 32 respectively), so there is no need to always call
__sysconf (_SC_SYMLOOP_MAX) for Linux case (!SYMLOOP_MAX). To avoid
a name clash with gnulib, rename the new file min-eloop-threshold.h.
Checked on x86_64-linux-gnu and with a build for x86_64-gnu.
Reviewed-by: DJ Delorie <dj@redhat.com>
- Create the __inet_ntop_chk routine that verifies that the builtin size
of the destination buffer is at least as big as the size given by the
user.
- Redirect calls from inet_ntop to __inet_ntop_chk or __inet_ntop_warn
- Update the abilist for this new routine
- Update the manual to mention the new fortification
Reviewed-by: Florian Weimer <fweimer@redhat.com>
C23 adds various <math.h> function families originally defined in TS
18661-4. Add the powr functions, which are like pow, but with simpler
handling of special cases (based on exp(y*log(x)), so negative x and
0^0 are domain errors, powers of -0 are always +0 or +Inf never -0 or
-Inf, and 1^+-Inf and Inf^0 are also domain errors, while NaN^0 and
1^NaN are NaN). The test inputs are taken from those for pow, with
appropriate adjustments (including removing all tests that would be
domain errors from those in auto-libm-test-in and adding some more
such tests in libm-test-powr.inc).
The underlying implementation uses __ieee754_pow functions after
dealing with all special cases that need to be handled differently.
It might be a little faster (avoiding a wrapper and redundant checks
for special cases) to have an underlying implementation built
separately for both pow and powr with compile-time conditionals for
special-case handling, but I expect the benefit of that would be
limited given that both functions will end up needing to use the same
logic for computing pow outside of special cases.
My understanding is that powr(negative, qNaN) should raise "invalid":
that the rule on "invalid" for an argument outside the domain of the
function takes precedence over a quiet NaN argument producing a quiet
NaN result with no exceptions raised (for rootn it's explicit that the
0th root of qNaN raises "invalid"). I've raised this on the WG14
reflector to confirm the intent.
Tested for x86_64 and x86, and with build-many-glibcs.py.
When an executable is invoked directly, we calculate $ORIGIN by calling
readlink on /proc/self/exe, which the Linux kernel resolves to the
target of any symlinks. However, if an executable is run through ld.so,
we cannot use /proc/self/exe and instead use the path given as an
argument. This leads to a different calculation of $ORIGIN, which is
most notable in that it causes ldd to behave differently (e.g., by not
finding a library) from directly running the program.
To make the behavior consistent, take advantage of the fact that the
kernel also resolves /proc/self/fd/ symlinks to the target of any
symlinks in the same manner, so once we have opened the main executable
in order to load it, replace the user-provided path with the result of
calling readlink("/proc/self/fd/N").
(On non-Linux platforms this resolution does not happen and so no
behavior change is needed.)
The __fd_to_filename requires _fitoa_word and _itoa_word, which for
32-bits pulls a lot of definitions from _itoa.c (due _ITOA_NEEDED
being defined). To simplify the build move the required function
to a new file, _fitoa_word.c.
Checked on x86_64-linux-gnu and i686-linux-gnu.
Co-authored-by: Geoffrey Thomas <geofft@ldpreload.com>
Reviewed-by: Geoffrey Thomas <geofft@ldpreload.com>
Tested-by: Geoffrey Thomas <geofft@ldpreload.com>
C23 adds various <math.h> function families originally defined in TS
18661-4. Add the rsqrt functions (1/sqrt(x)). The test inputs are
taken from those for sqrt.
Tested for x86_64 and x86, and with build-many-glibcs.py.
If no thread was created yet, __pthread_sigstate will not find our ss
because self->kernel_thread is still nul, and then change the global
sigstate instead of our sigstate! We can directly call __sigthreadmask and
skip the (bogus) lookup step.
powerpc was the only architecture with arch-specific hooks for
LD_SHOW_AUXV, and with the information moved to ld diagnostics there
is no need to keep the _dl_procinfo hook.
Checked with a build for all affected ABIs.
Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
