Commit Graph

505 Commits

Author SHA1 Message Date
David Xu
3128c7b24e Fix a POSIX conformance bug. POSIX says sigwait should return error number
in return value not in errno.
2004-03-17 02:12:19 +00:00
Bruce Evans
2dc8d58f59 Fixed a misspelling of 0 as NULL. 2004-03-14 05:27:26 +00:00
Colin Percival
d623b765cf style cleanup: Remove duplicate $FreeBSD$ tags.
These files had tags after the copyright notice,
inside the comment block (incorrect, removed),
and outside the comment block (correct).

Approved by:	rwatson (mentor)
2004-02-10 20:42:33 +00:00
Daniel Eischen
4b4d63bdfe Add cancellation point to sem_wait() and sem_timedwait() for pshared
semaphores.  Also add cancellation cleanup handlers to keep semaphores
in a consistent state.

Submitted in part by:	davidxu
Reviewed by:		davidxu
2004-02-06 15:20:56 +00:00
David Xu
cb10cbc878 libkse was renamed to libpthread. 2004-02-05 02:55:20 +00:00
Daniel Eischen
6bf50f98b1 Provide a userland version of non-pshared semaphores and add cancellation
points to sem_wait() and sem_timedwait().  Also make sem_post signal-safe.
2004-02-03 05:50:07 +00:00
Marcel Moolenaar
a99e07ba17 Now that libpthread is the default threading library, remove the
compatibility link from libc_r to libpthread (previously a link
from libc_r to libkse).
2004-01-31 05:05:45 +00:00
Daniel Eischen
bd224d495e Change libkse back to libpthread and make it the default
thread library for i386, amd64, and ia64.  For alpha
and sparc64 the library is not changed and remains libkse,
and links are installed so that libpthread -> libc_r.

The gcc -pthread option will be changed in a separate
commit so that it links to -lpthread instead of -lc_r.

Approved by:	re@
2004-01-30 12:13:17 +00:00
David Xu
e4dcaa6ee9 Return EPERM if mutex owner is not current thread but it tries to
unlock the mutex, old code confuses some programs when it returns EINVAL.

Noticed by: bland
2004-01-17 03:09:57 +00:00
Daniel Eischen
24f33bca1c Add a simple work-around for deadlocking on recursive read locks
on a rwlock while there are writers waiting.  We normally favor
writers but when a reader already has at least one other read lock,
we favor the reader.  We don't track all the rwlocks owned by a
thread, nor all the threads that own a rwlock -- we just keep
a count of all the read locks owned by a thread.

PR:	24641
2004-01-08 15:37:09 +00:00
David Xu
7a29c72c07 Kernel now supports per-thread sigaltstack, follow the change to
enable sigaltstack for scope system thread.
2004-01-03 02:40:27 +00:00
David Xu
ac4476923c Return error code in errno, not in return value. 2004-01-02 00:38:42 +00:00
David Xu
f909113819 Fix a typo. 2004-01-02 00:27:30 +00:00
David Xu
4560f4f0b1 Forgot to commit this file for last commit. :( 2003-12-29 23:33:51 +00:00
David Xu
02eead1d0a Implement sigaltstack() as per-threaded. Current only scope process thread
is supported, for scope system process, kernel signal bits need to be
changed.

Reviewed by: deischen
Tested on  : i386 amd64 ia64
2003-12-29 23:21:09 +00:00
David Xu
fff5bd9ed9 Correctly retrieve sigaction flags. 2003-12-28 12:20:04 +00:00
David Xu
c7148de1a6 Replace a comment with more accurated one, memory heap is now protected by
new fork() wrapper.
2003-12-19 13:24:54 +00:00
David Xu
22df7d650a Code clean up, remove unused MACROS and function prototypes. 2003-12-19 12:57:08 +00:00
Daniel Eischen
6ed6ccb310 accept() returns a file descriptor when it succeeds which is very
likely to be non-zero.  When leaving the cancellation point, check
the return value against -1 to see if cancellation should be
checked.  While I'm here, make the same change to connect() just
to be consisitent.

Pointed out by: davidxu
2003-12-09 23:40:27 +00:00
Daniel Eischen
fcebdd871d Remove an unused struct definition. 2003-12-09 15:18:40 +00:00
Daniel Eischen
cf25ae6974 Add cancellation points for accept() and connect(). 2003-12-09 15:16:27 +00:00
David Xu
cdbc3e83fa Use mutex instead of low level thread lock to implement spinlock, this
avoids signal to be blocked when otherwise it can be handled.
2003-12-09 02:37:40 +00:00
David Xu
71679e629d Rename _thr_enter_cancellation_point to _thr_cancel_enter, rename
_thr_leave_cancellation_point to _thr_cancel_leave, add a parameter
to _thr_cancel_leave to indicate whether cancellation point should be
checked, this gives us an option to not check cancallation point if
a syscall successfully returns to avoid any leaks, current I have
creat(), open() and fcntl(F_DUPFD) to not check cancellation point
after they sucessfully returned.

Replace some members in structure kse with bit flags to same some
memory.

Conditionally compile THR_ASSERT to nothing if _PTHREAD_INVARIANTS is
not defined.

Inline some small functions in thr_cancel.c.

Use __predict_false in thr_kern.c for some executed only once code.

Reviewd by: deischen
2003-12-09 02:20:56 +00:00
David Xu
d5c854e890 More reliably check timeout for pthread_mutex_timedlock. 2003-12-09 00:52:28 +00:00
Daniel Eischen
80fecc4d18 Go back to using rev 1.18 where thread locks are used instead of KSE
locks for [libc] spinlock implementation.  This was previously backed
out because it exposed a bug in ia64 implementation.

OK'd by:	marcel
2003-12-08 13:33:20 +00:00
Marcel Moolenaar
47eb01b822 Simplify the contexts created by the kernel and remove the related
flags. We now create asynchronous contexts or syscall contexts only.
Syscall contexts differ from the minimal ABI dictated contexts by
having the scratch registers saved and restored because that's where
we keep the syscall arguments and syscall return values.
Since this change affects KSE, have it use kse_switchin(2) for the
"new" syscall context.
2003-12-07 20:47:33 +00:00
Peter Wemm
30a62d30f4 Apply a second fix for stack alignment with libkse. This time, enter the
UTS with the stack correctly aligned.  Also, while here, use an indirect
jump rather than the pushq/ret hack.

This fixes threaded apps that use floating point for me, although
it hasn't solved all the problems.  It is an improvement though.
Preservation of the 128 byte red zone hasn't been resolved yet.

Approved by:  re (scottl)
2003-12-05 01:41:43 +00:00
David Xu
508f442784 Eliminate two pushl by using call instruction directly, this really
helps branch predict a lot for INTEL P4.

Approved by: re (scottl)
2003-11-29 14:25:43 +00:00
David Xu
170422c2ef 1.Macro optimizing KSE_LOCK_ACQUIRE and THR_LOCK_ACQUIRE to use static fall
through branch predict as suggested in INTEL IA32 optimization guide.

2.Allocate siginfo arrary separately to avoid pthread to be allocated at
2K boundary, which hits L1 address alias problem and causes context
switch to be slow down.

3.Simplify context switch code by removing redundant code, code size is
reduced, so it is expected to run faster.

Reviewed by: deischen
Approved by: re (scottl)
2003-11-29 14:22:29 +00:00
David Xu
5a8fe60d7e Remove surplus mmap() call for stack guard page in init_private, it is done
in init_main_thread. Also don't initialize lock and lockuser again for initial
thread, it is already done by _thr_alloc().

Reviewed by: deischen
Approved by: re (scottl)
2003-11-29 14:10:02 +00:00
Daniel Eischen
5303e94607 Back out last change and go back to using KSE locks instead of thread
locks until we know why this breaks ia64.

Reported by:	marcel
2003-11-16 15:01:26 +00:00
David Xu
0e17930dd7 If a thread in critical region got a synchronous signal, according current
signal handling mode, there is no chance to handle the signal, something
must be wrong in the library, just call kse_thr_interrupt to dump its core.
I have the code for a long time, but forgot to commit it.
2003-11-09 00:37:14 +00:00
David Xu
38a53c6206 Use THR lock instead of KSE lock to avoid scheduler be blocked in spinlock.
Reviewed by: deischen
2003-11-08 06:07:04 +00:00
Daniel Eischen
7a1192c1d3 style(9)
Reviewed by:	bde
2003-11-05 18:19:24 +00:00
Daniel Eischen
94db4dd759 Don't declare the malloc lock; use the declaration provided in libc.
Noticed by:	bde
2003-11-05 18:18:45 +00:00
David Xu
dfde783410 Add pthread_atfork() source code. Dan forgot to commit this file. 2003-11-05 03:42:10 +00:00
Daniel Eischen
4c1123c1c0 Add an implementation for pthread_atfork().
Aside from the POSIX requirements for pthread_atfork(), when
fork()ing, take the malloc lock to keep malloc state consistent
in the child.

Reviewed by:	davidxu
2003-11-04 20:04:45 +00:00
Daniel Eischen
d6b826bac7 Add the ability to reinitialize libpthread's internal FIFO-queueing
locks.

Reviewed by:	davidxu
2003-11-04 20:01:38 +00:00
Daniel Eischen
15a06fd231 Add the ability to reinitialize a spinlock (libc/libpthread
internal lock, not a pthread spinlock).

Reviewed by:	davidxu
2003-11-04 19:59:22 +00:00
Daniel Eischen
264978955e s/foo()/foo(void)/
Add a blank line after a variable declaration.
2003-11-04 19:58:12 +00:00
Daniel Eischen
dc17710e7c Libpthread uses the convention that all of its (non-weak) symbols
begin with underscores and provide weak definitions without
underscores.  Make the pthread spinlock conform to this convention.
2003-11-04 19:56:12 +00:00
Daniel Eischen
ee574ccc3e Add the ability to reinitialize a mutex (internally, not a userland
API).

Reviewed by:	davidxu
2003-11-04 19:53:32 +00:00
Peter Wemm
d1a499ad2a Use amd64_set_fsbase() instead of calling sysarch() directly. 2003-10-23 06:12:57 +00:00
Daniel Eischen
5bb9c67cc7 This test relies on the concurrency level being 1; make it so. 2003-10-20 04:23:49 +00:00
Peter Wemm
eaa9864401 Update context code for my last ABI breakage of mcontext. I'm worried
about the fpu code here.  It should be using fxsave/fxrstor instead of
saving/restoring the control word.  The SSE registers are used a lot in
gcc generated code on amd64.  I'm not sure how this all fits together
though.
2003-10-17 16:30:09 +00:00
Daniel Eischen
077af0a4b4 Don't forget to initialize the fake tcb when the kcb is allocated. 2003-10-12 16:50:45 +00:00
Daniel Eischen
1f2215bcc4 Reverse the order of the first two arguments to _sparc64_enter_uts().
The first argument is the UTS function, the second argument is the
first argument to the UTS function.  Who's on first.
2003-10-09 20:52:17 +00:00
Daniel Eischen
97576c1c61 Convert a couple of hardcoded values to constants. Make thr_getcontext()
return 0 when called the first time, and return 1 when resumed by
thr_setcontext().
2003-10-09 14:48:09 +00:00
Daniel Eischen
203a51090b Add preliminary sparc64 support to libpthread. This does not
yet work, but hopefully someone familiar with the sparc64
port can pick up the reins.

Submitted by:	jake
With mods by:	deischen
2003-10-09 02:32:28 +00:00
David Xu
3128827980 Fix some comments for last commit. 2003-10-08 00:30:38 +00:00