[Sema] Introduce BuiltinAttr, per-declaration builtin-ness
Instead of relying on whether a certain identifier is a builtin,
introduce BuiltinAttr to specify a declaration as having builtin
semantics.
This fixes incompatible redeclarations of builtins, as reverting the
identifier as being builtin due to one incompatible redeclaration
would have broken rest of the builtin calls.
Mostly-compatible redeclarations of builtins also no longer have
builtin semantics. They don't call the builtin nor inherit their
attributes.
A long-standing FIXME regarding builtins inside a namespace enclosed
in extern "C" not being recognized is also addressed.
Due to the more correct handling attributes for builtin functions are
added in more places, resulting in more useful warnings.
Tests are updated to reflect that.
Intrinsics without an inline definition in intrin.h had `inline` and
`static` removed as they had no effect and caused them to no longer
be recognized as builtins otherwise.
A pthread_create() related test is XFAIL-ed, as it relied on it being
recognized as a builtin based on its name.
The builtin declaration syntax is too restrictive and doesn't allow
custom structs, function pointers, etc.
It seems to be the only case and fixing this would require reworking
the current builtin syntax, so this seems acceptable.
Fixes PR45410.
Reviewed By: rsmith, yutsumi
Differential Revision: https://reviews.llvm.org/D77491
This should fix 'Assertion failed: (i < getNumParams() && "Illegal
param #"), function getParamDecl, file
/usr/src/contrib/llvm-project/clang/include/clang/AST/Decl.h, line 2430'
when building the graphics/pgplot port.
Note that there may also have been other ports which triggered this
assertion, if they redeclare standard functions with incompatible
arguments.
Reported by: zeising
MFC after: 6 weeks
X-MFC-With: r364284
The Cirrus-CI-provided working tree is owned by root. Leave that as is
for simplicity but build as an unprivileged user; this tests building
with an unmodifiable source tree as a side effect.
Continue running the smoke test as root for now, as it failed when run
as an unprivileged user - pkg reported "Fail to chmod
/usr/bin/.pkgtemp.lpq.dUHpEqPGJ9pq:Operation not permitted"
Sponsored by: The FreeBSD Foundation
Change the zone setup:
- Allow slabs to be returned to the OS
- Set the number of slots to the max devctl will queue before discarding
- Reserve 2% of the max (capped at 100) for low memory allocations
- Disable per-cpu caching since we don't need it and we avoid some pathologies
Change the alloation strategiy a bit:
- If a normal allocation fails, try to get the reserve
- If a reserve allocation fails, re-use the oldest-queued entry for storage
- If there's a weird race/failure and nothing on the queue to steal, return NULL
This addresses two main issues in the old code:
- If devd had died, and we're generating a lot of messages, we have an
unbounded leak. This new scheme avoids the issue that lead to this.
- The MPASS that was 'sure' the allocation couldn't have failed turned out
to be wrong in some rare cases. The new code doesn't make this assumption.
Since we reserve only 2% of the space, we go from about 1MB of
allocation all the time to more like 50kB for the reserve.
Reviewed by: markj@
Differential Revision: https://reviews.freebsd.org/D26448
Don't permit setting the exception bitmap or VMCS entry interrupt
information. These are not generally useful to set. If it is needed
in the future, dedicated pseudo registers can be added for these that
would be used with vm_set_register().
Discussed with: grehan
MFC after: 1 week
Since r347532 (merged to stable/12) we only count user-wired pages
towards the system limit. However, we now also treat pages wired by
hypervisors (bhyve and virtualbox) as user-wired, so starting VMs with
large amounts of RAM tends to fail due to the low limit.
The purpose of the limit is to provide a seatbelt, not to impose some
policy on the use of wired memory. Thus, increase the default limit to
allow reasonable VM configurations to work without tuning.
Reviewed by: kib
Discussed with: dougm
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26424
Contrary to my belief, installworld is not sufficient for getting certs
installed into VM images. Promote the rehash to both installworld and
distributeworld (notably: not stageworld) and rehash the base distdir so we
end up with /etc/ssl/certs populated in the base dist archive. A future
commit will remove the rehash from bsdinstall, which doesn't really need to
happen if they're installed into base.txz.
While here, fix a minor typo: s/CERTCLTFLAGS/CERTCTLFLAGS/
MFC after: 1 week
Use of ranlib or lorder is no longer necessary with current linkers
(probably anything newer than ~1990) and ar's ability to create an object
index and symbol table in the archive.
Currently the build system uses lorder+tsort to sort the .o files in
dependency order so that a single-pass linker can use them. However,
we can use the -s flag to ar to add an index to the .a file which makes
lorder unnecessary.
Running ar -s is equivalent to running ranlib afterwards, so we can also
skip the ranlib invocation.
Similarly, we don't have to pass the .o files for shared libraries in
dependency order since both ld.bfd and ld.lld will correctly resolve
references between the .o files.
This removes many fork()+execve calls for each library so should speed up
builds a bit. Additionally lorder.sh uses a regular expression that is not
supported by the macOS libc or glibc and results in many warnings when
cross-building (see D25989).
There is one functional change: lorder.sh removed duplicated .o files
from the linker command line which now no longer happens. I fixed the duplicates
in the base system in r364649. I also checked the ports tree for uses of
bsd.lib.mk and found one duplicate source file which I fixed in r548168.
Most ports use CMake/autotools rather than bsd.lib.mk but if this breaks any
ports that I missed in my search please let me know.
Avoiding the shell script actually speeds up the linking step noticeably: I
measured how long it takes to rebuild the .a and .so files for lib/libc using a
basic benchmark: `rm $LIBC_OBJDIR/*.so* $LIBC_OBJDIR/*.a* && /usr/bin/time make -DWITHOUT_TESTS -s > /dev/null`
Without this change ~4.5 seconds and afterwards ~3.1 seconds.
Looking at truss -cf output we can see that the number fork() system
calls goes down from 27 to 12 (and the speedup while tracing is more
noticeable: 81 seconds -> 65 seconds).
See also https://www.gnu.org/software/coreutils/manual/html_node/tsort-background.html
for some more background:
This whole procedure has been obsolete since about 1980, because Unix
archives now contain a symbol table (traditionally built by ranlib, now
generally built by ar itself), and the Unix linker uses the symbol table
to effectively make multiple passes over an archive file.
Or alternatively https://www.unix.com/man-page/osf1/1/lorder/:
The lorder command is essentially obsolete. Use the following command in
its place: % ar -ts file.a
Reviewed By: emaste, imp, dim
Differential Revision: https://reviews.freebsd.org/D26044
This is followup to r365477.
If pre-formatted device has GPT and a partition covering
last available LBAs and the device is attached using
a bridge reducing amount of LBAs, then it could be not enough
forcing GEOM to use primary GPT. Also, we should make it possible
to recover GPT and this requires either deleting or resizing the partition.
This change enables "gpart delete" and "gpart resize" commands
on corrupted GPT with following "gpart recover".
It still does not allow modifying corrupted GPT without
preliminary setting sysctl kern.geom.part.check_integrity=0
For example:
# gpart show da0
=> 34 3906963389 da0 GPT (1.8T) [CORRUPT]
34 262144 1 ms-reserved (128M)
262178 2014 - free - (1.0M)
264192 3906764943 2 freebsd-swap (1.8T)
# gpart resize -i 2 -s 3900000000 da0
# gpart recover da0
Reported by: Alex Korchmar
MFC after: 3 days
This was originally introduced back in r360833, and subsequently reverted
because it was broken for -DNO_ROOT builds and it may not have been the
correct place for it.
While debatably this may still not be 'the correct place,' it's much cleaner
than scattering rehashes all throughout the tree. brooks has fixed the issue
with -DNO_ROOT by properly writing to the METALOG in r361397.
Do note that this is different than what was originally committed; brooks
had revisions in D24932 that made it actually use the revised unprivileged
mode and write to METALOG, along with being a little more friendly to
foreign crossbuilds and just using the certctl in-tree.
With this change, I believe we should now have a populated /etc/ssl/certs in
the VM images.
MFC after: 1 week
Both before and after job control adjustments.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D26416
Orphans affect job control state, we must account for them when
changing pg_jobc.
Instead of p_pptr, use proc_realparent() to get parent relevant for
job control.
Use correct calculation of the parent for exiting process. For jobc
purposes, we must use realparent, but if it is also exiting, we should
fall to reaper, then recursively find non-exiting reaper.
Reported by: trasz
PR: 249257
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D26416
Use ddb pager.
Make lines more compact.
Eliminate unneeded casts.
Print more job-control related info when reporting process group.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D26416
Split TMPFS_NODE_ACCCESSED bit into dedicated byte that can be updated
atomically without locks or (locked) atomics.
tn_update_getattr() change also contains unrelated bug fix.
Reported by: lwhsu
PR: 249362
Reviewed by: markj (previous version)
Discussed with: mjg
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26451
As with .text, the aim is to ensure that executable sections are
segregated from the rest, to avoid creation of writeable and executable
mappings. Recent versions of LLVM emit a PLT in firmware modules.
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26444
Recent testing of the NFS-over-TLS code found a LOR between the mutex lock
used for sessions and the sleep lock used for server side krpc socket
structures.
The code in nfsrv_checksequence() would call SVC_RELEASE() with the mutex
held. Normally this is ok, since all that happens is SVC_RELEASE()
decrements a reference count. However, if the socket has just been shut
down, SVC_RELEASE() drops the reference count to 0 and acquires a sleep
lock during destruction of the server side krpc structure.
This patch fixes the problem by moving the SVC_RELEASE() call in
nfsrv_checksequence() down a few lines to below where the mutex is released.
MFC after: 1 week
Or it could be explained as lockless (for vnode lock) reads. Reads
are performed from the node tn_obj object. Tmpfs regular vnode object
lifecycle is significantly different from the normal OBJT_VNODE: it is
alive as far as ref_count > 0.
Ensure liveness of the tmpfs VREG node and consequently v_object
inside VOP_READ_PGCACHE by referencing tmpfs node in tmpfs_open().
Provide custom tmpfs fo_close() method on file, to ensure that close
is paired with open.
Add tmpfs VOP_READ_PGCACHE that takes advantage of all tmpfs quirks.
It is quite cheap in code size sense to support page-ins for read for
tmpfs even if we do not own tmpfs vnode lock. Also, we can handle
holes in tmpfs node without additional efforts, and do not have
limitation of the transfer size.
Reviewed by: markj
Discussed with and benchmarked by: mjg (previous version)
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26346
Avoid tmpfs mount and node locks when ref count is greater than zero,
which is the case until node is being destroyed by unlink or unmount.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26346
There are several negative side-effects of not calling into VOP layer
at all for page cache reads. The biggest is the missed activation of
EVFILT_READ knotes.
Also, it allows filesystem to make more fine grained decision to
refuse read from page cache.
Keep VIRF_PGREAD flag around, it is still useful for nullfs, and for
asserts.
Reviewed by: markj
Tested by: pho
Discussed with: mjg
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26346
The pointer to vnode is already stored into f_vnode, so f_data can be
reused. Fix all found users of f_data for DTYPE_VNODE.
Provide finit_vnode() helper to initialize file of DTYPE_VNODE type.
Reviewed by: markj (previous version)
Discussed with: freqlabs (openzfs chunk)
Tested by: pho (previous version)
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D26346
From Franco:
The iflib rewrite forced the promisc flag but it was not reported
to the system. Noticed on a stock VM that went into unsolicited
promisc mode when dhclient was started during bootup.
PR: 248869
Submitted by: Franco Fichtner <franco@opnsense.org>
Reviewed by: erj@
MFC after: 3 days
This re-adds the opt_rss.h header to the driver and includes some
RSS-specific headers when RSS is defined.
PR: 249191
Submitted by: Milosz Kaniewski <milosz.kaniewski@gmail.com>
MFC after: 3 days
Due to a check that should have been an endian check being an #if 0,
the wrong checksum mask table was being used on LE, which was causing
extreme strangeness in DNS resolution -- *some* hosts would be resolvable,
but most would not.
This fixes DNS resolution.
(I am committing some parts of the LE patchset ahead of time to reduce the
amount of work I have to do while committing the main patchset.)
Sponsored by: Tag1 Consulting, Inc.
Intercept and report #UD to VM on SVM/AMD in case VM tried to execute an
SVM instruction. Otherwise, SVM allows execution of them, and instructions
operate on host physical addresses despite being executed in guest mode.
Reported by: Maxime Villard <max@m00nbsd.net>
admbug: 972
CVE: CVE-2020-7467
Reviewed by: grehan, markj
Differential revision: https://reviews.freebsd.org/D26313
This function wasn't converted to use the new locking protocol in
r333744. Make it use the PCB lock for synchronizing connection state.
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26300
unp_pcb_owned_lock2() has some sharp edges and forces callers to deal
with a bunch of cases. Simplify it:
- Rename to unp_pcb_lock_peer().
- Return the connected peer instead of forcing callers to load it
beforehand.
- Handle self-connected sockets.
- In unp_connectat(), just lock the accept socket directly. It should
not be possible for the nascent socket to participate in any other
lock orders.
- Get rid of connect_internal(). It does not provide any useful
checking anymore.
- Block in unp_connectat() when a different thread is concurrently
attempting to lock both sides of a connection. This provides simpler
semantics for callers of unp_pcb_lock_peer().
- Make unp_connectat() return EISCONN if the socket is already
connected. This fixes a race[1] when multiple threads attempt to
connect() to different addresses using the same datagram socket.
Upper layers will disconnect a connected datagram socket before
calling the protocol connect's method, but there is no synchronization
between this and protocol-layer code.
Reported by: syzkaller [1]
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26299
The allocated memory is only required for SOCK_STREAM and SOCK_SEQPACKET
sockets.
Reviewed by: kevans
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26298
In all cases, PCBs are unlocked after unp_disconnect() returns. Since
unp_disconnect() may release the last PCB reference, callers may have to
bump the refcount before the call just so that they can release them
again.
Change unp_disconnect() to release PCB locks as well as connection
references; this lets us remove several refcount manipulations. Tighten
assertions.
Tested by: pho
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26297
