not spinlock_t. Spinlock_t and the associated functions and macros may
require blocking signals in order for async-safe libc functions to behave
appropriately in libthr. This is undesriable for libthr internal locking.
So, this is the first step in completely separating libthr from libc's
locking primitives.
Three new macros should be used for internal libthr locking from now on:
THR_LOCK, THR_TRYLOCK, THR_UNLOCK.
and the disabling of signals. What we are really interested in is
keeping track of recursive disabling of signals. We should not
be recursively acquiring thread locks. Any such situations should
be reorganized to not require a recursive lock.
Separating the two out also allows us to block signals independent of
acquiring thread locks. This will be needed in libthr in the near future when
we put the pieces together to protect libc functions that use pthread mutexes
and low level locks.
Change execvp to be a wrapper around execvP. This is necessary for some
of the /rescue pieces. It may also be more generally applicable as well.
Submitted by: Tim Kientzle <kientzle@acm.org>
Approved by: Silence on arch@
implementation and the new improved one. We now precompute the
signal set passed to sigtimedwait, using an inverted set when
necessary for compatibility with older kernels.
exit function has invalidated the need for _spin[un]lock_pthread().
The _spin[un]lock() functions can now dereference curthread without
the danger that the ldtentry containing the pointer to the thread
has been cleared out from under them.
signals were changed in kernel, it will retrieve the pending set and
try to find a thread to dispatch the signal. The dispatching process
can be rolled back if the signal is no longer in kernel.
o Create two functions _thr_signal_init() and _thr_signal_deinit(),
all signal action settings are retrieved from kernel when threading
mode is turned on, after a fork(), child process will reset them to
user settings by calling _thr_signal_deinit(). when threading mode
is not turned on, all signal operations are direct past to kernel.
o When a thread generated a synchoronous signals and its context returned
from completed list, UTS will retrieve the signal from its mailbox and try
to deliver the signal to thread.
o Context signal mask is now only used when delivering signals, thread's
current signal mask is always the one in pthread structure.
o Remove have_signals field in pthread structure, replace it with
psf_valid in pthread_signal_frame. when psf_valid is true, in context
switch time, thread will backout itself from some mutex/condition
internal queues, then begin to process signals. when a thread is not
at blocked state and running, check_pending indicates there are signals
for the thread, after preempted and then resumed time, UTS will try to
deliver signals to the thread.
o At signal delivering time, not only pending signals in thread will be
scanned, process's pending signals will be scanned too.
o Change sigwait code a bit, remove field sigwait in pthread_wait_data,
replace it with oldsigmask in pthread structure, when a thread calls
sigwait(), its current signal mask is backuped to oldsigmask, and waitset
is copied to its signal mask and when the thread gets a signal in the
waitset range, its current signal mask is restored from oldsigmask,
these are done in atomic fashion.
o Two additional POSIX APIs are implemented, sigwaitinfo() and sigtimedwait().
o Signal code locking is better than previous, there is fewer race conditions.
o Temporary disable most of code in _kse_single_thread as it is not safe
after fork().
[+|-]Inf, [+|-]NaN, nan(...), and hexidecimal FP constants.
While here, add %a and %A, which are aliases for %e, and
add support for long doubles.
Reviewed by: standards@
breakages. Note that runtime compatibility is not guaranteed. Future
changes to setjmp/longjmp in libc will break threaded applications
linked against libc_r.so.5 on ia64. We pull our "tier 2" card once
more...
Reviewed by: ru
obsolete. The intend is to add glue to either libthr or
libpthread to create the necessary compat links.
o Hook libpthread to the build on ia64. This is slightly out of
order, because the kernel still doesn't have all the support,
but that's not a problem in this case.
functions are derived from the swapctx() and restorectx() (resp)
from sys/ia64/ia64/context.s. The code is expected to be 99%
correct, but has not yet been tested.
Note that with these functions operating on mcontext_t, we also
created the foundation upon which we can implement getcontext(2)
and setcontext(2) replacements. It's not guaranteed that the use
of these syscalls and _ia64_{save|restore}_context() on the same
uicontext_t is actually going to work. Replacing the syscalls is
now trivially achieved.
This commit completes the ia64 port of libpthread itself (modulo
testing and bugfixes).
the register stack and memory stack and call the function given to it.
While here, provide empty, non-working, stubs for the context functions
(_ia64_save_context() and _ia64_restore_context()) so that anyone can at
least compile libkse from CVS sources. Real implementations will follow
soon.
minimize the amount and complexity of assembly code that needs to be
written. This way the core functionality is spread over 3 elementary
functions that don't have to do anything that can more easily and
more safely be done in C. As such, assembly code will only have to
know about the definition of mcontext_t.
The runtime cost of not having these functions being inlined is less
important than the cleanliness and maintainability of the code at
this stage of the implementation.
and sigsuspend(2), all three of which operate or depend on the
process signal mask.
Add a missing xref to sigsetops(3), without which the above three
syscalls would be useless.
platforms the compiler warns about incompatible integer/pointer casts
and on ia64 this generally is bad news. We know that what we're doing
here is valid/correct, so suppress the warning. No functional change.
Sleeps better: marcel
by moving the definition of struct ksd to pthread_md.h and removing
the inclusion of ksd.h from thr_private.h (which has the definition
of struct kse and kse_critical_t). This allows ksd.h to have inline
functions that use struct kse and kse_critical_t and generally
yields a cleaner implementation at the cost of not having all ksd
related types/definitions in one header.
Implement the ksd functionality on ia64 by using inline functions
and permanently remove ksd.c from the ia64 specific makefile.
This change does not clean up the i386 specific version of ksd.h.
NOTE: The ksd code on ia64 abuses the tp register in the same way
as it is abused in libthr in that it is incompatible with the
runtime specification. This will be address when support for TLS
hits the tree.
_ksd_readandclear_tmbx to be function-like. That way we
can define them as inline functions or create prototypes
for them.
This change allows the ksd interface on ia64 to be fully
inlined.
TAI is a timescale, just like UTC. The tai field returns the offset
between the two, and isn't really used for precision time keeping.
Explain in brief what a positive and a negative leap seconds are. Add
some URLs to very useful web pages about time and time keeping for
more information on using this API.
Reviewed by: phk
or -1 on failure. The manual used to say it returned 0 or -1. Both
examination of the kernel sources, and ntpd show that this is the case.
MFC After: 3 days
Also fixed the rest of ell (list) functions prototypes to include
a (commented out) terminating null pointer.
Pointed out by: bde
Obtained from: POSIX.1-2001
Glanced at by: imp
for root on ypmaster. yppasswd_local() did use YPPASSWDPROG
instead of MASTER_YPPASSWDPROG, and the domain was not set,
resulting in a coredump during xdr-encode.
Reviewed by: des
replaced just fine with getpeereid() and the whole code
gets a lot simpler. We don't break the ABI, since all server
programms use __rpc_get_local_uid(), and we just change library
internals.
Reviewed by: des
and libdevstat, since the new way of doing things is to just list
maintainership in src/MAINTAINERS.
Also, remove duplicate entries in src/MAINTAINERS for those utilities. I
already had entries for them.
It is only possible to do this on an ABI that has a compulsory frame
pointer, which the amd64 ABI does not. Thus, it is only possible to
implement this as a compiler builtin.
fgetrune(), fputrune(), fungetrune(), mbrune(), mbrrune(), mbmb(),
setinvalidrune(), UTF2 encoding method.
These have been marked as being deprecated in their manual pages since 5.0,
and their use causes a linker warning.
getino(3)/putino(3), inode.c has been reworked in Perforce to the point
where a manual page may not be accurate. Certainly putino(3) has not
even been merged back yet.
These will need a lot of improvement for most applications, but they
document the API enough to get someone on their feet, most likely. The
best documentation still exists in the form of libufs(3) consumers in the
base system.
the chance of getting the same thread id when allocating a
new thread is reduced. This won't work if the application
creates a new thread for every time a thread exits, but
we're still within the allowances of POSIX.
debugging is enabled so the symbol needs to be resolved before rtld
locking is enabled. I may not really know what I'm talking about,
but it works.
Submitted by: kan
cat ${.ALLSRC} > ${.TARGET}
rather than
ln -sf ${.ALLSRC} ${.TARGET}
not to depends on absolute-path of symbolic links.
Commented by: marcel, obrien, bde
- -elf in CFLAGS had no effect except to reduce portability.
- -elf in LDFLAGS had even less effect, since LDFLAGS is not used.
- -Wall in CFLAGS had no effect except to reduce portability and break
overriding of WARNS, since the setting of WARNS implies -Wall.
an application compiled -static with libthr would dump core in
malloc(3) because the stub thread initialization routine in libc would
be used instead of the libthr supplied one.
don't allow it at the moment, the correct thing to do is try again.
Otherwise, libthr would fail this test because it doesn't allow
an unlimited number of concurrent threads per application.
that the old API (passing "" as the attribute name to the _get_
interface) is now deprecated (and was probably a bad idea).
Pointed out by: Dominic Giampaolo <dbg@apple.com>
Obtained from: TrustedBSD Project
Sponsored by: DARPA, Network Associates Laboratories
hashing scheme used in Microsoft's NT machines. IT IS NOT SECURE!
DON'T USE IT! This is for the use of competent sysadmins only!
Submitted by: Michael Bretterklieber
o Make sure the arguments to ctx_wrapper() are loaded from the
backing store by forcing an underflow. Do this by making all
registers in the register frame local.
is not called, and no static rules match an outgoing packet, the
latter retains its source IP address. This is in support of the
"static NAT only" mode.
o Up to 8 arguments are allowed. This is the number of arguments
passed in registers. Subsequent registers are passed on the stack.
Trying to deal with this is not easy in C and likely forces us to
use assembly code. Let's avoid that for now. There's no indication
that more than 8 arguments is a strong requirement (Linux also has
an 8 argument limit).
o We expect that the stack base is 16-byte aligned and the stack
size is a multiple of 16-byte. We bomb out if this is not the case.
We probably want to be less strict by enforcing it ourselves. For
now it's better to not hide gross alignment bogons by silently
correcting it.
