Somehow the first review merged only the commit log.
FreeBSD doesn't have m68k anyway, so use fenv from musl with as less
changes as possible.
Change-Id: I6372af6679e6773fbb6bf4c8b5b30512971a97a6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3161
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
It allows an application to signal that it no longer needs the data in
the given address range and the underlying pages can be discarded and
reused elsewhere. This is finer grained than working with full areas
or mappings at a time and enables unmapping sections of partially used
mappings without giving up its address space.
Compared with punching holes into a mapping by "mapping over" with
PROT_NONE and MAP_NORESERVE, this has the obvious advantage of not
producing a lot of unused extra areas and saves the corresponding
resources. It is also a lot "lighter" of an operation than cutting
existing areas.
This introduces madvise() alongside the existing posix_madvise() to
allow for OS specific extensions. The constants for both functions are
aliased, the POSIX_MADV_* being a subset of the MADV_* ones without the
non-POSIX extensions. Internally posix_madvise() simply calls madvise().
MADV_FREE is commonly supported in other OSes with various subtle
semantic differences as to when pages are actually freed/cleared and how
or whether the pages are counted against the memory use of a process.
In the variant implemented here, pages are always immediately discarded
and memory counting is not altered. This behaviour should be considered
an implementation detail and may be altered later. The actual unmap and
discard could for example be delayed until pages are needed elsewhere to
reduce overhead in case of repeated discarding and remapping.
Note that MADV_FREE doesn't really align with the rest of the madvise()
API as it works like a command (i.e. discard these pages) and does not
add an attribute to the pages in the given range (i.e. mark these pages
for quick access from now on). As such, an MADV_FREE does not need to be
undone by setting a different advice later on, unlike how the other
flags work. This discrepancy may be the reason why it is not part of
POSIX.
Change-Id: Icc093379125a43e465dc4409d8f5ae0f64e107e0
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2844
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
The limit was set when creating limits.h back in hrev88. It seems to be
used only in glob(). The limit is quite low by today standards and
prevents building icu 67.
I guess the liit was put at 32K because that's what BeOS did, but I see
no reason to keep it that way.
Change-Id: I74f95d9b56891dd90c79b7ced35ca8d1ec81d6ab
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3117
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
The BSD implementation was under the Advertising Clause,
so we might as well take the opportunity to replace the
implementation entirely with musl's.
Header also rewritten to be a Haiku one; the constants
are left unchanged of course.
Taken from FreeBSD; some minor cleanup elsewhere.
udp.h rewritten entirely as it contained no copyrightable
material and bears little resemblance to BSD's.
* Remove functions not even FreeBSD defines.
* Remove dependency on unnecessary headers.
* Update copyright headers to match FreeBSD's; includes
removal of the advertising clause.
* Move some private structs to netresolv port_before.
Unfortunately, it seems musl implements very little of this file,
so we may wind up sticking with netresolv for its implementation.
* Remove all functions and a number of constants that neither
glibc nor musl define or support (and even FreeBSD does not
declare a good number of these anymore.)
* Redeclare the primary flags in terms of (1 << X) instead
of raw 0x... for readability (the constants at the end
do NOT match up to their definitions in glibc, musl, and BSDs!)
* Remove usage of unneeded headers, and __BEGIN/END_DECLS.
* Replace non-Haiku license headers with the ones from FreeBSD,
which notably contain a removal of the advertising clause.
ABIs remain unchanged, but a small set of applications that
use these esoteric APIs may not compile anymore (are there
any remaining?)
These are not in the standard and are not declared by glibc at all.
The symbols remain for any applications that are still using them,
for now.\
Change-Id: Ie6b4a6b5ec3231c304e05ce9cb38c67d9ee51ad7
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2942
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
xsave or xsavec are supported.
breaks vregs compatibility.
change the thread structure object cache alignment to 64
the xsave fpu_state size isn't defined, it is for instance 832 here, thus I picked 1024.
Change-Id: I4a0cab0bc42c1d37f24dcafb8259f8ff24a330d2
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2849
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
We attempted to make it a 32bit char type, but that is actually not allowed
unless we also make uint_least16_t a 32bit type. And even then, we
wouldn't be allowed to store or handle values wider than 16bit.
Comply more closely to the standard. As a result, mbtoc16r is not
implemented. c16rtomb is implemented by casting the char to 32bit, which
isn't really correct either (I think you're supposed to be able to feed
the two halves of a > 16bit codepoint in two separate calls and get a
meaningful result out?)
Related to #15990 but we may want an actual implementation?
Change-Id: If8198675c27dd2aa412bc44d12d3df4e31d3e8c7
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2623
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
This reverts hrev54120 and instead adds the commonly supported
MAP_NORESERVE flag to request overcommit.
Using PROT_NONE for overcommit is problematic as the protection of
individual pages can still be changed via mprotect to make them
accessible, but that won't change the commitment. An application
using such a pattern may then unexpectedly run into out of memory
conditions on random writes into the address space.
With MAP_NORESERVE the overcommit can explicitly be requested by
applications that want to reserve address space without producing
memory pressure.
Change-Id: Id213d2245c5e23103e8e0857f7902e0cd8a2c65d
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2611
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
- Use gcc builtin
- Define as a static inline function in the .h so no function call overhead is needed
- Keep the function in libroot for backwards compatibility
- Remove a duplicate implementation in the freebsd compatibility layer
gcc2 does not document the builtin, but it is in fact already available
there as well.
Fixes#3281.
Change-Id: I94f8a2548637aa70e85febbfab06f07c1a427005
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2605
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
It was not specified as such before C11, but that's only because there
was no C standard way to do it until then.
Fixes#15955.
Change-Id: Ied7b7fd94988ed7724460917aebc859b74eaa585
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2558
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
* A few tips for future folks follows.
* fenv.h gets wrapped in our buildtools
* If anything in the arch fenv.h "doesn't work" buildtools
will silently fail early on (autotools HAVE_FENV_H)
Change-Id: Icae064fde42af3bbed5ea2eadfaa8c18c677e6a6
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2164
Reviewed-by: Alex von Gluck IV <kallisti5@unixzen.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Borrowed from FreeBSD with some changes to get it building.
Now we need to rebuild the gcc package...
Change-Id: I6b8dfd7fb6ca912c76e2ff10fbe01ad583a09aec
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2131
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
glibc does the same. Technically, some of these builtins did
not exist / did not work before GCC 4.4, but the source tree
cannot be compiled with a version that old anyway.
x86_64 and _x86 need to keep the old functions for now, of
course; but all other architectures can probably feel free
to drop the s_isnan, etc. functions from their glibc.
This will make upcoming patches easier...
Change-Id: Ifb76ea74076553228c9741a8ee3ecb0e1cf736a3
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2076
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
For #15515
As mentionned in the ticket, we may also want to hide the symbols
altogether from libroot for newer API/ABI versions, unless we still want
to provide C89/C99/C++98/C++11 compatibility, in which case we still
need them around.
Change-Id: I0ee267fb6c4c2f4bae9b1ba6f68e2bcefc399a7f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2061
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Discovered this while working on VLC, checked with other online sources too.
Change-Id: I114c20babda0ff0e90d0eeee299d8483700166bd
Reviewed-on: https://review.haiku-os.org/c/1628
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
should help for ports.
Change-Id: Id504bdb79cb68db4b615f58848e0e1a86ced8d2b
Reviewed-on: https://review.haiku-os.org/c/1467
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
* Oops, there's a standard for these. Stick to the standard.
* Add a few that could be useful someday.
* Mention iana spec.
Change-Id: I4cf75e8c1e4b25f65d10921c7075fbd53f44e14e
Fixes the build breakage caused by PulkoMandy's recent commit.
Remove these from ByteOrder.h now also, as per POSIX they should
come from netinet/in.h.
This is a small source compatibility breakage, but it will only
affect a small portion of non-POSIX, partially-Be applications.
Gets the stage0 bootstrap to run.
Imlementation is probably nonsense at this point.
Change-Id: I10876efbb54314b864c0ad951152757cdb2fd366
Reviewed-on: https://review.haiku-os.org/c/1061
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Implemented against POSIX-1.2013.
The implementation POSIX requirement thats setpriority() shall affect the
priority of all system scope threads only extends to POSIX threads. This
is implemented by modifying the default attributes for newly spawned
pthreads.
It is not possible to modify the default pthread attributes for different
processes with the current implementation, as default pthread attributes
are implemented in user-space. As a result, PRIO_PROCESS for which and 0
for who is the only supported combination for setpriority().
While it is possible to move the default attributes to the kernel, it
is chosen not to so as to keep the pthread implementation user-space only.
POSIX requires that lowering the nice value (increasing priority) can be
done only by processes with appropriate privileges. However, as Haiku
currently doesn't harbor any restrictions in setting the thread priority,
this is not implemented.
It is possible to have small precision errors when converting from Unix-
style thread priority to Be-style. For example, the following program
outputs "17" instead of the expected "18":
#include <stdio.h>
#include <sys/resource.h>
int
main()
{
setpriority(PRIO_PROCESS, 0, 18);
printf("%d\n", getpriority(PRIO_PROCESS, 0));
return 0;
}
The underlying reason is because when you setpriority() both 18 and 19
are converted to the Be-style "2". This problem should not happen with
priority levels lower than or equal to 20, when the Be notation is more
precise than the Unix-style.
Done as a part of GCI 2014. Fixes#2817.
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Co-authored-by: Leorize <leorize+oss@disroot.org>
Change-Id: Ie14f105b00fe8563d16b3562748e1c2e56c873a6
Reviewed-on: https://review.haiku-os.org/c/78
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
This should prevents GCC from throwing -Werror=return-type when
pthread_exit is used in place of return
Change-Id: Ied7da58b671e77b53d859b67193259aa78ec27d6
Reviewed-on: https://review.haiku-os.org/632
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
