Commit Graph

356 Commits

Author SHA1 Message Date
John Birrell
9db56888ee Fix a bug where a short write to a non-blocking socket would
leave the descriptor locked, causing other threads to hang
if they happened to access the socket.

MFC after:	5 days
2002-02-22 04:26:54 +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
b85282ba08 Prevent dup2(2) from closing internal libc_r pipe descriptors.
PR:		misc/28947
Reviewed by:	jasone, ru
Approved by:	jasone, ru
MFC after:	1 week
2002-02-14 15:26:59 +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
b68bb42b5c Silence a warning by initializing the return value. This wasn't
set in the case of a short write, and I think returning 0 for this
is what was intended.
2002-02-09 19:48:55 +00:00
David Greenman
2e4bf827e5 Undo the work-around for the sendfile bug where nbytes needed the hdr/trl
size added to it in order for it to work properly when nbytes != 0.

Reviewed by:	alfred
MFC after:	3 days
2002-01-22 23:35:09 +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
Alfred Perlstein
a9ee9c593d Fix a number of subtle and evil bugs in the libc_r wrapping of sendfile(2).
o) Since we unwrap the sendfile syscall, check the return value of
   writev(2) to see if it didn't complete all the data.
   Previously if only a partial writev() succeeded, it would proceed
   to sendfile(2) even though the headers weren't completely sent.

o) Properly adjust the "bytes to send" to take into account sendfile(2)'s
   behaviour of counting the headers against the bytes to be transfered
   from the file.

o) Correct the problem where EAGAIN was being returned from _sys_sendfile(2)
   however the wrapper didn't update the 'sent bytes' parameter to take into
   account for it.  This is because sendfile can return EAGAIN even though
   it has actually transfered data.

Special thanks to Justin Erenkrantz <jerenkrantz@apache.org> for bringing
this to my attention and giving an excellent way to reproduce the problem.

PR: kern/32684
MFC After: 1 week
2001-12-12 08:02:24 +00:00
Maxim Sobolev
e10f1484e4 Prevent infinite loop, when kevent(2) is called wihout eventlist (i.e.
eventlist == NULL or nevents == 0).
2001-12-08 00:53:37 +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
Murray Stokely
5e77dc7342 Describe handling of NULLs passed to pthread_setcancelstate().
PR:		docs/31745
Submitted by:	Andrew <andrew@ugh.net.au>
2001-11-05 08:21:32 +00:00
Dima Dorfman
5e52f30031 Mark up NULL in .Dv.
PR:		31747
Submitted by:	<andrew@ugh.net.au>
2001-11-04 23:13:03 +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
Peter Wemm
9d91d74d2b Change #include "DEFS.h" to <machine/asm.h>. 2001-10-25 01:30:54 +00:00
Daniel Eischen
f39105fa50 In the words of the submitter:
In libc_r, if _FDLOCKS_ENABLED is not defined, there is no guarantee
  in many of the sycall wrappers that _thread_fd_table[fd] is
  initialized.  This causes problems for programs that pass in file
  descriptors and execve() another program; when the exec'ed program
  tries to do an fcntl() or other syscall on the passed-in fd, it fails.

Add calls to initialize the FD table entry for _thread_fd_lock and
_thread_fd_lock_debug.

Submitted by:	Peter S. Housel <housel@acm.org>
2001-10-21 18:23:50 +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
Ruslan Ermilov
32eef9aeb1 mdoc(7) police: Use the new .In macro for #include statements. 2001-10-01 16:09:29 +00:00
Ruslan Ermilov
d6002fef6f Use ``.Rv -std'' wherever possible.
Submitted by:	yar
2001-08-31 09:57:38 +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
Ruslan Ermilov
04da392069 mdoc(7) police: s/OpenBSD/.Ox/ where appropriate. 2001-08-13 16:43:02 +00:00
Ruslan Ermilov
c5e7e03a14 Spell "FreeBSD" with "F" and "BSD" in uppercase. 2001-08-13 16:33:00 +00:00
Ruslan Ermilov
8af1452cf8 Removed duplicate VCS ID tags, as per style(9). 2001-08-13 14:06:34 +00:00
Warner Losh
e54b5dd9ff Make the name parameter const char *. 2001-08-11 05:16:00 +00:00
Yaroslav Tykhiy
b1250632c5 Use the ``.Rv -std'' mdoc(7) macro in appropriate cases.
Reviewed by:	ru
2001-08-09 13:32:13 +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
Dima Dorfman
7ebcc426ef Remove whitespace at EOL. 2001-07-15 07:53:42 +00:00
Ruslan Ermilov
a307d59838 mdoc(7) police: removed HISTORY info from the .Os call. 2001-07-10 13:41:46 +00:00
Dima Dorfman
70d51341bf mdoc(7) police: remove extraneous .Pp before and/or after .Sh. 2001-07-09 09:54:33 +00:00
Ruslan Ermilov
5521ff5a4d mdoc(7) police: sort SEE ALSO xrefs (sort -b -f +2 -3 +1 -2). 2001-07-06 16:46:48 +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
Gregory Neil Shapiro
c1c5db8149 Typo fix: requires -> reacquires
Submitted by:	Murray S. Kucherawy <msk@sendmail.com>
MFC after:	3 days
2001-06-27 06:01:17 +00:00
Dima Dorfman
d33f4d20c9 Add a missing word.
Obtained from:	OpenBSD
2001-06-05 00:25:18 +00:00
Dima Dorfman
5940a2ebe0 Add a missing word. 2001-06-05 00:11:08 +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
Ruslan Ermilov
108b08b24e Fixed typo in the description.
PR:		docs/27411
Submitted by:	David Wimsey <dwimsey@rtci.com>
2001-05-18 06:56:03 +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