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* Direct call exit if thread was never created. This makes it safe to callDavid Xu2003-08-181-0/+2
| | | | | | | | | pthread_exit in main() without creating any thread. Tessted by: deischen Notes: svn path=/head/; revision=119064
* Treat initial thread as scope system thread when KSE mode is not activatedDavid Xu2003-08-1812-81/+47
| | | | | | | | | | | | yet, so we can protect some locking code from being interrupted by signal handling. When KSE mode is turned on, reset the thread flag to scope process except we are running in 1:1 mode which we needn't turn it off. Also remove some unused member variables in structure kse. Tested by: deischen Notes: svn path=/head/; revision=119063
* If threaded mode is not turned on yet, direct call __sys_sched_yield.David Xu2003-08-161-2/+3
| | | | Notes: svn path=/head/; revision=118989
* Keep initial kse and kse group just like we keep initial thread,David Xu2003-08-161-9/+11
| | | | | | | | | Don't free them, so some code can still reference them. Reviewed by: deischen Notes: svn path=/head/; revision=118985
* Access user provided pointer out of lock, and also check the case whenDavid Xu2003-08-161-8/+10
| | | | | | | a key is less than 0. Notes: svn path=/head/; revision=118984
* Always set tcb for bound thread, and switch tcb for M:N thread at correctDavid Xu2003-08-131-7/+18
| | | | | | | time. Notes: svn path=/head/; revision=118850
* Correctly set current tcb. This fixes some IA64/KSE problems.David Xu2003-08-121-17/+11
| | | | | | | Reviewed by: deischen, julian Notes: svn path=/head/; revision=118817
* Add some quick pathes to exit process when signal action is default andDavid Xu2003-08-101-0/+21
| | | | | | | | | signal can causes process to exit. Reviewed by: deischen Notes: svn path=/head/; revision=118748
* Initialize rtld lock just before turning on thread mode andDavid Xu2003-08-103-35/+37
| | | | | | | uninitialize rtld lock after thread mode shutdown. Notes: svn path=/head/; revision=118747
* If thread mode is not activated yet, just call __sys_fork() directly,David Xu2003-08-101-1/+22
| | | | | | | | | | | otherwise masks all signals until fork() returns, in child process, we reset library state before restoring signal masks until we reach a safe to point. Reviewed by: deischen Notes: svn path=/head/; revision=118746
* Tweak rtld lock to allow recursive on reader lock and detect recursiveDavid Xu2003-08-101-10/+67
| | | | | | | | | on writer lock. This is first cut at rwlock for rtld. Submitted by: desichen Notes: svn path=/head/; revision=118745
* If thread mode is not activated yet, don't do extra work.David Xu2003-08-101-0/+4
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=118744
* o Add code to GC freed KSEs and KSE groupsDavid Xu2003-08-081-25/+116
| | | | | | | | | | o Fix a bug in kse_free_unlocked(), kcb_dtor shouldn't be called because the KSE is cached and will be resued in _kse_alloc(). Reviewed by: deischen Notes: svn path=/head/; revision=118676
* Don't call kse_set_curthread() when scheduling a new boundDaniel Eischen2003-08-061-2/+3
| | | | | | | | | | thread. It should only be called by the current kse and never by a KSE on behalf of another. Submitted by: davidxu Notes: svn path=/head/; revision=118516
* Fix an off by one error in the number of arguments passed toMarcel Moolenaar2003-08-061-1/+1
| | | | | | | | | makecontext(). We only supply 3, not 4. This is mostly harmless, except that on ia64 the garbage can include NaT bits, resulting in NaT consumption faults. Notes: svn path=/head/; revision=118514
* Rethink the MD interfaces for libpthread to account forDaniel Eischen2003-08-057-210/+197
| | | | | | | | | | | | archs that can (or are required to) have per-thread registers. Tested on i386, amd64; marcel is testing on ia64 and will have some follow-up commits. Reviewed by: davidxu Notes: svn path=/head/; revision=118510
* sysctlbyname needs size_t type, not int.David Xu2003-07-311-1/+1
| | | | Notes: svn path=/head/; revision=118254
* Don't forget to unlock the scheduler lock. Somehow this got removedDaniel Eischen2003-07-301-0/+1
| | | | | | | | | | from one of my last commits. This only affected priority ceiling mutexes. Pointy hat to: deischen Notes: svn path=/head/; revision=118206
* Simplify sigwait code a bit by using a waitset and removing oldsigmask.David Xu2003-07-273-22/+17
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=118075
* Move idle kse wakeup to outside of regions where locks are held.Daniel Eischen2003-07-238-73/+130
| | | | | | | | | | | This eliminates ping-ponging of locks, where the idle KSE wakes up only to find the lock it needs is being held. This gives little or no gain to M:N mode but greatly speeds up 1:1 mode. Reviewed & Tested by: davidxu Notes: svn path=/head/; revision=117907
* Override libc function raise(), in threading mode, raise() willDavid Xu2003-07-192-0/+54
| | | | | | | | | send signal to current thread. Reviewed by: deischen Notes: svn path=/head/; revision=117758
* Cleanup thread accounting. Don't reset a threads timesliceDaniel Eischen2003-07-183-38/+27
| | | | | | | | | | | when it blocks; it only gets reset when it yields. Properly set a thread's default stack guardsize. Reviewed by: davidxu Notes: svn path=/head/; revision=117715
* Add a preemption point when a mutex or condition variable isDaniel Eischen2003-07-182-6/+18
| | | | | | | | | | | | | | | | | | handed-off/signaled to a higher priority thread. Note that when there are idle KSEs that could run the higher priority thread, we still add the preemption point because it seems to take the kernel a while to schedule an idle KSE. The drawbacks are that threads will be swapped more often between CPUs (KSEs) and that there will be an extra userland context switch (the idle KSE is still woken and will probably resume the preempted thread). We'll revisit this if and when idle CPU/KSE wakeup times improve. Inspired by: Petri Helenius <pete@he.iki.fi> Reviewed by: davidxu Notes: svn path=/head/; revision=117714
* o Eliminate upcall for PTHREAD_SYSTEM_SCOPE thread, now itDavid Xu2003-07-1714-395/+596
| | | | | | | | | | | | | | | | is system bound thread and when it is blocked, no upcall is generated. o Add ability to libkse to allow it run in pure 1:1 threading mode, defining SYSTEM_SCOPE_ONLY in Makefile can turn on this option. o Eliminate code for installing dummy signal handler for sigwait call. o Add hash table to find thread. Reviewed by: deischen Notes: svn path=/head/; revision=117706
* Don't resume sigwait thread If signal is masked.David Xu2003-07-091-8/+12
| | | | Notes: svn path=/head/; revision=117366
* POSIX says if a thread is in sigwait state, although a signal may not inDavid Xu2003-07-092-11/+29
| | | | | | | | | | | its waitset, but if the signal is not masked by the thread, the signal can interrupt the thread and signal action can be invoked by the thread, sigwait should return with errno set to EINTR. Also save and restore thread internal state(timeout and interrupted) around signal handler invoking. Notes: svn path=/head/; revision=117353
* Restore signal mask correctly after fork().David Xu2003-07-092-4/+6
| | | | Notes: svn path=/head/; revision=117345
* Save and restore thread's error code around signal handling.David Xu2003-07-091-1/+2
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=117344
* Correctly print signal mask, the bug was introduced by cut and pasteDavid Xu2003-07-071-11/+20
| | | | | | | in last commit. Notes: svn path=/head/; revision=117305
* Add a newline to debug message.David Xu2003-07-071-1/+1
| | | | Notes: svn path=/head/; revision=117301
* Avoid accessing user provided parameters in critical region.David Xu2003-07-079-46/+65
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=117300
* Print thread's scope, also print signal mask for every thread and printDavid Xu2003-07-071-17/+13
| | | | | | | it in one line. Notes: svn path=/head/; revision=117297
* Correctly lock/unlock signal lock. I must be in bad state, need to sleep.David Xu2003-07-041-1/+2
| | | | Notes: svn path=/head/; revision=117217
* Always check and restore sigaction previously set, also access user parameterDavid Xu2003-07-041-4/+7
| | | | | | | outside of lock. Notes: svn path=/head/; revision=117216
* If select() is only used for sleep, convert it to nanosleep,David Xu2003-07-031-4/+9
| | | | | | | it only need purely wait in user space. Notes: svn path=/head/; revision=117197
* Check if thread is in critical region, only testing check_pendingDavid Xu2003-07-031-1/+2
| | | | | | | is not enough. Notes: svn path=/head/; revision=117193
* Set unlock_mutex to 1 after locked mutex.David Xu2003-07-021-2/+4
| | | | | | | | Use THR_CONDQ_CLEAR not THR_COND_SET in cond_queue_deq, current cond_queue_deq is not used. Notes: svn path=/head/; revision=117165
* Fix typo.David Xu2003-07-021-1/+1
| | | | Notes: svn path=/head/; revision=117162
* Because there are only _SIG_MAXSIG elements in thread siginfo array,David Xu2003-06-303-16/+16
| | | | | | | use [signal number - 1] as subscript to access the array. Notes: svn path=/head/; revision=117066
* Remove surplus unlocking code I accidentally checked in. This won't beDavid Xu2003-06-301-4/+0
| | | | | | | triggered until LDT entry is exhausted. Notes: svn path=/head/; revision=117063
* o Use a daemon thread to monitor signal events in kernel, if pendingDavid Xu2003-06-2812-586/+806
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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(). Notes: svn path=/head/; revision=116977
* Use mmap retuned value.David Xu2003-06-281-2/+3
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=116976
* Temporary disable rwlock based code, replace it with low level KSE lockingDavid Xu2003-06-281-0/+92
| | | | | | | | | | code until rtld-elf and libkse can cooperate better, those code can be restored. Reviewed by: deischen Notes: svn path=/head/; revision=116975
* Write new thread pointer back only when success.David Xu2003-06-281-3/+4
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=116974
* After thread was interrupted by signal, it should relock mutex.David Xu2003-06-281-2/+1
| | | | | | | Reviewed by: deischen Notes: svn path=/head/; revision=116973
* if thread is exiting, just returns. kse_thr_interrupt interfaceDavid Xu2003-06-281-2/+6
| | | | | | | | | | was changed, it needs signal parameter, pass -1 to it, it indicates to interrupt syscall. Reviewed by: deischen Notes: svn path=/head/; revision=116972
* Explicitly widen int types before casting to pointer types. On 64-bitMarcel Moolenaar2003-06-241-3/+4
| | | | | | | | | | | 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 Notes: svn path=/head/; revision=116773
* Untangle the inter-dependency of kse types and ksd types/functionsMarcel Moolenaar2003-06-232-2/+1
| | | | | | | | | | | | | | | | | | | | | | 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. Notes: svn path=/head/; revision=116771
* Change the definition of _ksd_curkse, _ksd_curthread andMarcel Moolenaar2003-06-231-3/+3
| | | | | | | | | | | | _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. Notes: svn path=/head/; revision=116719
* Don't lock scheduler lock twice.David Xu2003-06-181-2/+1
| | | | Notes: svn path=/head/; revision=116514
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