no userland locks are heald, the dead thread lock can no longer protect
access to it. Therefore, instead of using an if (!dead)...else clause
after walking the active threads list test the thread pointer before
deciding not to walk the dead threads list. If the thread pointer is null
it means it was not found in the active threads list and the dead threads
list should be checked.
2. Do not free the stack of a thread that is not marked dead. This is the
2nd and final part of eliminating the race to free a thread's stack.
MFC after: 3 days
Extract the struct cdev pointer and the tty device from inside rather than
incorrectly casting the 'struct cdev *' pointer to a 'dev_t' int. Not
that this was particularly important since it was only used for reading
vmcore files.
- Make some minor rearrangements in the introduction.
- Mention the problem with argument reduction on i386.
- Add recently-implemented functions to the table.
- Un-document the error bounds that only apply to the old 4BSD math
library, and fill in the correct values where I know them. No
attempt has been made to document bounds lower than 1 ulp, although
smaller bounds are usually achievable in round-to-nearest mode.
Requested by: bde
o Remove unneeded sys/types.h and netinet/in.h from the synopsis and
the example.
o We do have struct in_addr in arpa/inet.h, so no need for netinet/in.h.
o Mention where AF_* constants defined are.
Educated by: bde
- Add a comment noting that the ru_[us]times values being read aren't
actually valid and need to be computed from the raw values.
Submitted by: many (1)
After some discussion the best option seems to be to signal the thread's
death from within the kernel. This requires that thr_exit() take an
argument.
Discussed with: davidxu, deischen, marcel
MFC after: 3 days
/lib/{libm,libreadline}
/usr/lib/{libhistory,libopie,libpcap}
in preparation for doing the same thing to RELENG_5. HUGE amounts of
help for determining what to bump provided by kris.
Discussed on: freebsd-current
Approved by: re (not required for commit but something like this should be)
the signal mask and pending signals of the calling thread. These
are stored in userland in libpthread.
There is a small race condition in this patch which could cause
problems if a signal arrives after setting the (kernel) signal
mask and before exec'ing. The thread's set of pending signals
also are not yet installed in the exec'd process. Both of these
will be corrected with the addition of a special syscall.
Reported & Tested by: Joost Bekkers <joost at jodocus dot org>
Reviewed by: julian, davidxu
1. Install man files and links for the lwres library.
2. Fix the path in various files to say /etc/namedb/ instead of just /etc.
3. Correctly install the conf file man pages for named and rndc.
to match how similar syntax is used in the ports system. Thanks to kris
for pointing out my mistake here.
Install the lwres library unless the user defines NO_BIND, or the new
knob, NO_BIND_LIBS_LWRES. There is at least one potential customer
for this library in the wings. Thanks to nectar for the reminder.
but have a knob (WANT_BIND_LIBS) to build and install them in /usr/lib
and /usr/include. Rumors are that this may be useful at a later point,
let's see.
What this really means is that all BIND libraries are now internal to
buildworld (by default, unless WANT_BIND_LIBS is defined), and linked
statically into various BIND executables.
While here, removed redundant -I's from CFLAGS in lib/bind makefiles.
Sponsored by: des
OK'ed by: dougb
__isnan() and __isnanf() must remain in libc for hysterical raisins.
On the other hand, __isnanl() must live in libm because libm uses it
internally and can't depend on older versions of libc to provide it.
Fortunately, we don't need __isnanl() in both libraries.
Prodded by: ale
PR: 71698
MT5 candidate
specified mutex is invalid. In spec parlance 'MAY FAIL' means it's
up to the implementor. So, remove the check for NULL pointers for two
reasons:
1. A mutex may be invalid without necessarily being NULL.
2. If the pointer to the mutex is NULL core-dumping in the
vicinity of the problem is much much much better than failing
in some other part of the code (especially when the application
doesn't check the return value of the function that you oh so
helpfully set to EINVAL).
full KSE support still have -lpthread as an alias for -lc_r. The only
thing that's different is the name of the knob that turns it off.
Pointed out by: ru@
POSIX threads libraries are not available. Add crypto support if
the crypto libraries are available. Build dnssec-{keygen,signzone}
if crypto is available.
Submitted by: (in part) dougb@
1. The correct cutoff for large uid/gid handling is 1<<18, not 1<<20.
2. Limit the uid/gid in the 'x' extension header (where numeric extensions
are not permitted) to 1<<18, but use the correct value in the regular
header (where numeric extensions are permitted).
Thanks to: Dan Nelson
MFC after: 3 days
caused by refering broken (uninitialized?) pointer which is retrieved
from __bt_new() (and from mpool_new()).
I don't know why this linp[0] is read before stored because this
should be controlled by .lower and .upper member of PAGE structure
which are correctly initialized.
But this workaround fixes the problem on my environment and this
module has #ifdef PURIFY option which initializes new and reused
memory from mpool by memset(p, 0xff, size) like as I did.
Please feel free to fix the real bug instead of my workaround.
transaction id from the request, this is useful for debugging.
Fix the autoh_freeall(3) function to properly free the array of
auto handles. Before it was freeing individual members of the list
OK, however it was then advancing the pointer and freeing the wrong
data for the whole list.
multibyte character support:
- In CHadd(), avoid writing past the end of the character set bitmap when
the opposite-case counterpart of wide characters with values less than
NC have values greater than or equal to NC.
- In CHaddtype(), fix a braino that caused alphabetic characters to be
added to all character classes! (but only with REG_ICASE)
PR: 71367
but with slightly cleaned up interfaces.
The KSE structure has become the same as the "per thread scheduler
private data" structure. In order to not make the diffs too great
one is #defined as the other at this time.
The KSE (or td_sched) structure is now allocated per thread and has no
allocation code of its own.
Concurrency for a KSEGRP is now kept track of via a simple pair of counters
rather than using KSE structures as tokens.
Since the KSE structure is different in each scheduler, kern_switch.c
is now included at the end of each scheduler. Nothing outside the
scheduler knows the contents of the KSE (aka td_sched) structure.
The fields in the ksegrp structure that are to do with the scheduler's
queueing mechanisms are now moved to the kg_sched structure.
(per ksegrp scheduler private data structure). In other words how the
scheduler queues and keeps track of threads is no-one's business except
the scheduler's. This should allow people to write experimental
schedulers with completely different internal structuring.
A scheduler call sched_set_concurrency(kg, N) has been added that
notifies teh scheduler that no more than N threads from that ksegrp
should be allowed to be on concurrently scheduled. This is also
used to enforce 'fainess' at this time so that a ksegrp with
10000 threads can not swamp a the run queue and force out a process
with 1 thread, since the current code will not set the concurrency above
NCPU, and both schedulers will not allow more than that many
onto the system run queue at a time. Each scheduler should eventualy develop
their own methods to do this now that they are effectively separated.
Rejig libthr's kernel interface to follow the same code paths as
linkse for scope system threads. This has slightly hurt libthr's performance
but I will work to recover as much of it as I can.
Thread exit code has been cleaned up greatly.
exit and exec code now transitions a process back to
'standard non-threaded mode' before taking the next step.
Reviewed by: scottl, peter
MFC after: 1 week
denote a directory. Unfortunately, in the presence of GNU or POSIX
extensions, this code was checking the truncated filename stored in the
regular header rather than the full filename stored in the extended
attribute. As a result, long filenames with '/' in just the right
position would trigger this check and be erroneously marked as
directories. Move the check so it only considers the full filename.
Note: the check can't simply be disabled for archives that contain
these extensions because there are some very broken archivers out
there.
Thanks to: Will Froning
MFC after: 3 days
since otherwise the initial seek offset will contain the directory
offset of the filesystem block that contained its directory entry.
This bug was mostly harmless because typically the directory is
less than one filesystem block in size so the offset would be zero.
It did however generally break loading a kernel from the (large)
kernel compile directory.
Also reset the seek pointer when a new inode is opened in read_inode(),
though this is not actually necessary now because all callers set
it afterwards.
By using r8 instead of r14 to do the swap, we put the dst argument
in the return register. Since bcopy() doesn't clobber r8, we don't
have to do anything else. This fixes ports/textproc/aspell.
documenting the obsoleteness of the msync(2) syscall and its single
remaining purpose.
PR: 70916
Submitted by: Radim Kolar <hsn@netmag.cz>
MFC after: 3 days
.h files. This simplifies the Makefile here a bit and makes it behave
better in a couple of situations. While I'm here, clean up some comments
and try to improve the organization a bit.
Thanks to: Ruslan Ermilov (The Marvelous Makefile Guru)
