Commit Graph

263 Commits

Author SHA1 Message Date
Robert Watson
4a85ccbe6d Missed in earlier commit -- I did cvs commit src/lib/libc. Oops. 2002-06-14 04:02:25 +00:00
Daniel Eischen
5eb8d1f0b0 Revamp suspend and resume. While I'm here add pthread_suspend_all_np()
and pthread_resume_all_np().  These suspend and resume all threads except
the current thread, respectively.  The existing functions pthread_single_np()
and pthread_multi_np(), which formerly had no effect, now exhibit the same
behaviour and pthread_suspend_all_np() and pthread_resume_all_np().  These
functions have been added mostly for the native java port.

Don't allow the uthread kernel pipe to use the same descriptors as
stdio.  Mostily submitted by Oswald Buddenhagen <ossi@kde.org>.

Correct some minor style nits.
2002-05-24 04:32:28 +00:00
Alfred Perlstein
2b75bbdb31 Undo namespace pollution by prefixing the globals pthread_guard_default and
pthread_page_size.

Fix a bunch line wrapping.

Pointed out by: deischen
2002-05-15 05:37:48 +00:00
Alfred Perlstein
efe5270b1e Don't use PAGE_SIZE in userland, instead use getpagesize(), this is to
allow running on other arches when the instructions are supported but
the page size granularity is not.

Glanced at by: peter
2002-05-13 07:58:15 +00:00
Alfred Perlstein
e5ba687a2c Use GCC's __attribute__ ((constructor)) mechanism to invoke the pthread
startup code rather than a static C++ object since c++ seems to be broken.

This doesn't seem to work for staticically linked program just yet, I'll
give that some more work when I get a chance.
2002-05-11 08:13:42 +00:00
Archie Cobbs
663fc9cc7c Make these functions cancellation points like they should be:
poll(2), readv(2), select(2), wait4(2), writev(2).

PR:		bin/37658
Reviewed by:	deischen
MFC after:	1 week
2002-05-02 19:58:43 +00:00
Archie Cobbs
ca0989d865 Make sure calls to pthread_cancel() do not take effect if the target
thread is already exiting.

PR:		bin/37614
Reviewed by:	deischen
MFC after:	1 week
2002-05-02 19:57:59 +00:00
Dag-Erling Smørgrav
d397408818 Usage style sweep: spell "usage" with a small 'u'.
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.
2002-04-22 13:44:47 +00:00
David E. O'Brien
07a7a2eba8 The GCC developers have made good on their threats against #pragma for 3.1.
Use __weak_reference in place of the #pragma.

Submitted by:	eischen
2002-04-15 23:11:38 +00:00
David E. O'Brien
cb81cd7952 Sync SCM ID comments with libc. 2002-04-15 20:22:28 +00:00
Jeroen Ruigrok van der Werven
92d2baa6a2 Return correct number of total bits set in all fd_set's.
Change case of POLLNVAL as an error.
Remove POLLHUP and POLLERR from one case, their place is most likely
amongst read events.

PR:		33723
Submitted by:	Alexander Litvin <archer@whichever.org>
Reviewed by:	deischen [Provided a small change to the PR patch as well]
MFC after:	4 weeks
2002-04-09 05:41:00 +00:00
Mark Murray
4cd0119367 Do not use __progname directly (except in [gs]etprogname(3)).
Also, make an internal _getprogname() that is used only inside
libc. For libc, getprogname(3) is a weak symbol in case a
function of the same name is defined in userland.
2002-03-29 22:43:43 +00:00
Daniel Eischen
3003bdb598 Add the ability to recognize old references to keys, and return NULL
when old keys are referenced (after pthread_key_delete()) via
pthread_getspecific().
2002-03-19 22:58:56 +00:00
Brian S. Dean
b18ae9245d Fix the return code from pthread_rwlock_try[rw|rd]lock() functions;
these should return EBUSY when the calling thread would block.

MFC after: 2 weeks
2002-03-15 18:27:58 +00:00
Daniel Eischen
ca4b2c1a79 Properly clear the status of a join operation if the joining thread is
canceled or the joinee is detached.
2002-03-06 19:28:41 +00:00
Daniel Eischen
9e9c4443f6 Don't rely on <sys/signal.h> to include <sys/ucontext.h> 2002-02-17 17:21:27 +00:00
Maxim Konovalov
0878d2e5e9 Correct a typo pthread_attr_setscope() function fails unconditionally
due to.

PR:		misc/30699
Reviewed by:	jasone, ru
Approved by:	jasone, ru
MFC after:	1 week
2002-02-14 15:20:36 +00:00
Daniel Eischen
69c287d288 This has been sitting in my local tree long enough. Remove the use
of an alternate signal stack for handling signals.  Let the kernel
send signals on the stack of the current thread and teach the threads
signal handler how to deliver signals to the current thread if it
needs to.  Also, always store a threads context as a jmp_buf.  Eventually
this will change to be a ucontext_t or mcontext_t.

Other small nits.  Use struct pthread * instead of pthread_t in internal
library routines.  The threads code wants struct pthread *, and pthread_t
doesn't necessarily have to be the same.

Reviewed by:	jasone
2002-02-09 19:58:41 +00:00
Daniel Eischen
2d170746c7 Use the real function address (instead of function address + 8) for the
return address when modifying a jmp_buf to create a new thread context.
Also set t12 with the return address.

This should fix libc_r on alpha.

With much detective work by: Bernd Walter <ticso@cicely.de>
2001-12-22 06:11:06 +00:00
Daniel Eischen
7512c816c0 Fix the retrieval of USRSTACK via sysctl so that it works for 64-bit
archs.  This should fix libc_r on alpha.

Submitted by:	Bernd Walter <ticso@cicely9.cicely.de>
2001-12-18 02:02:59 +00:00
Daniel Eischen
320bfcf3f1 When cancelling a thread while in a join operation, do not detach
the target thread of the join operation.  This allows the cancelled
thread to detach the target thread in its cancellation handler.
This bug was found by Butenhof's cancel_subcontract test.

Reviewed by:	jasone
2001-12-16 13:26:44 +00:00
Daniel Eischen
35686a943a Pull the target thread of a join operation from the correct place
when cancelling a thread.
2001-12-15 15:52:24 +00:00
Daniel Eischen
ccc7b69205 Fix pthread_join so that it works if the target thread exits while
the joining thread is in a signal handler.

Reported by:	Loren James Rittle <rittle@labs.mot.com>
MFC after:	1 week
2001-11-17 14:28:39 +00:00
Peter Wemm
eb9053b12f Make libc_r check the kern.usrstack sysctl instead of using internal
kernel #defines to figure out where the stack is located.  This stops
libc_r from exploding when the kernel is compiled with a different
KVM size.  IMHO this is all kinda bogus, it would be better to just
check %esp and work from that.
2001-10-26 21:19:22 +00:00
Ruslan Ermilov
98f9b06876 Style: sort __sys_foo() prototypes, tabs -> spaces, etc. 2001-10-26 18:45:02 +00:00
Ruslan Ermilov
53cff25eeb Removed:
- uthread_signal.c; libc_r does not wrap signal() since 1998/04/29.

- uthread_attr_setprio.c; it was never connected to the build, and
  pthread_attr_setprio() does not exist in POSIX.

- uthread_sigblock.c and uthread_sigsetmask.c; these were no-ops
  bloating libc_r's space.

pthread_private.h:

- Removed prototypes of non-syscalls: send().

- Removed prototypes of unused syscalls: sigpending(), sigsuspend(),
  and select().

- Fixed prototype of fork().

- MFS: Fixed prototypes of <sys/socket.h> syscalls.

Reviewed by:	deischen
Approved by:	deischen, jasone
2001-10-26 17:46:36 +00:00
Bruce Evans
6eabd84580 Compensate for "Compensate for header dethreading" by backing it out. 2001-10-10 17:48:44 +00:00
Daniel Eischen
7ae9a22df2 Limit maximum poll interval to 60 seconds. This prevents an overflow
from occurring when converting from a timeval/timespec to a timeout in
milliseconds.

Submitted by:	dwmalone
2001-10-07 02:34:43 +00:00
Kris Kennaway
6dac8ac9e5 Mark some functions as __printflike() and/or taking const char * arguments
instead of char *.

MFC after:	2 weeks
2001-08-20 12:53:36 +00:00
Jason Evans
204e56e381 Fix logic errors in pthread_cond_wait() and pthread_cond_timedwait() that
could cause deadlock after interruption due to a signal.

Reviewed by:	deischen
2001-08-19 20:05:42 +00:00
Jason Evans
8588aeec8c Fix a bug in canceling joining threads.
Do not detach canceled threads.

Reported by:		Arno Klaassen <arno@heho.snv.jussieu.fr>
Collaboration with:	deischen
2001-08-16 06:31:32 +00:00
Warner Losh
e54b5dd9ff Make the name parameter const char *. 2001-08-11 05:16:00 +00:00
Jason Evans
aa33517e94 Implement pthread_attr_[gs]etguardsize(). Non-default-size stacks used to
be malloc()ed, but they are now allocated using mmap(), just as the
default-size stacks are.  A separate cache of stacks is kept for
non-default-size stacks.

Collaboration with:	deischen
2001-07-20 04:23:11 +00:00
Daniel Eischen
a9513dc678 Clear the in thread scheduler flag after jumping to the start of
a signal handler from the scheduler.

MFC after:	1 week
2001-06-29 17:09:07 +00:00
Jason Evans
651974ee92 Fix a race condition in pthread_join(). All of the following must occur
atomically:

1) Search _thread_list for the thread to join.
2) Search _dead_list for the thread to join.
3) Set the running thread as the joiner.

While we're at it, fix a race in the case where multiple threads try to
join on the same thread.  POSIX says that the behavior of multiple joiners
is undefined, but the fix is cheap as a result of the other fix.
2001-06-27 11:41:15 +00:00
Jason Evans
c024882f08 Add a test for PR 24345. 2001-05-20 23:12:13 +00:00
Jason Evans
b39e7e33f1 Update the verify script. 2001-05-20 23:11:54 +00:00
Jason Evans
745b431dc6 Don't define _REENTRANT, since the Makefile does so. 2001-05-20 23:11:09 +00:00
Jason Evans
dd2d9a766b Fix a typo. 2001-05-20 23:10:30 +00:00
Jason Evans
6699b0c6fe Instead of using a join queue for each thread, use a single pointer to
keep track of a joiner.  POSIX only supports a single joiner, so this
simplification is acceptable.

At the same time, make sure to mark a joined thread as detached so that
its resources can be freed.

Reviewed by:	deischen
PR:		24345
2001-05-20 23:08:33 +00:00
Jason Evans
ffc19644c0 Condition variable waiters are queued in descending priority order, so
there is no need to wake all waiters to assure that the highest priority
thread is run.  As the semaphore code is written, there was no correctness
problem, but the change improves sem_post() performance.

Pointed out by:	deischen
2001-05-18 00:36:05 +00:00
Jason Evans
1317e200a8 Mark a thread that is suspended while sleeping as interrupted. 2001-05-16 21:58:45 +00:00
Akinori MUSHA
3b26be6ae1 Properly copy the P_ALTSTACK flag in struct proc::p_flag to the child
process on fork(2).

It is the supposed behavior stated in the manpage of sigaction(2), and
Solaris, NetBSD and FreeBSD 3-STABLE correctly do so.

The previous fix against libc_r/uthread/uthread_fork.c fixed the
problem only for the programs linked with libc_r, so back it out and
fix fork(2) itself to help those not linked with libc_r as well.

PR:		kern/26705
Submitted by:	KUROSAWA Takahiro <fwkg7679@mb.infoweb.ne.jp>
Tested by:	knu, GOTOU Yuuzou <gotoyuzo@notwork.org>,
		and some other people
Not objected by:	hackers
MFC in:		3 days
2001-05-07 18:07:29 +00:00
Daniel Eischen
59cc2dcac7 Move the check for a pending signals to after the thread has been
placed in any scheduling queue(s).  The process of dispatching
signals to a thread can change its state which will attempt to add
or remove the thread from any scheduling queue to which it belongs.
This can break some assertions if the thread isn't in the queue(s)
implied by its state.

When adding dispatching a pending signal to a thread, be sure to
remove the signal from the threads set of pending signals.

PR:		27035
Tested by:	brian
MFC in:		1 week
2001-05-04 20:37:07 +00:00
Mark Murray
98d2ef9e72 Compenate for header dethreading. 2001-05-01 09:32:34 +00:00
Daniel Eischen
9391331024 Typo; fix open() so that it is not a cancellation point when called
from libc.
2001-04-18 12:42:11 +00:00
Daniel Eischen
1cf08f3929 Reinstall the alternate signal stack after a fork.
PR:		25110
Tested by:	knu
2001-04-18 12:40:30 +00:00
Daniel Eischen
f9c408bc01 Clean up a bit. Use the correct TAILQ link when walking the thread
lists to free thread resources after a fork (in the child).  Also
remember to free the dead thread list.
2001-04-10 04:25:49 +00:00
Daniel Eischen
437df4859a To be consistent, use the __weak_reference macro from <sys/cdefs.h>
instead of #pragma weak to create weak definitions.

Suggested by:	bde
2001-04-10 04:19:21 +00:00
Thomas Moestl
8b28ef9528 Activate build of posix1e extensions in libc and libc_r that have been
moved in from libposix1e, and deactivate build of the soon-to-be-removed
libposix1e.

Approved by:	rwatson
Obtained from:	TrustedBSD Project
2001-04-04 18:17:28 +00:00