namely, put the thread to deadqueue rather than just leaking it.
- fix a race between pthread_detach/join and pthread_exit,
which also causes dead thread leaks.
waiters list in all cases, not just on cancellation; there are other
sources of spurious wakeups, such as single-stepping in the debugger.
regress/lib/libpthread/conddestroy1 now passes.
- statically initialize all global spin locks. on hppa, 0 means
the lock is held, so leaving them with the default value doesn't work.
- compare functions pointers using a function-pointer type rather than
an integral type. on hppa, function pointers may be indirect,
so we need to trigger gcc to emit calls to the function-pointer
canonicalization routines in the millicode.
- on hppa the stack grows up, so handle that using the STACK_* macros.
sleep(3) expects this, even though it's not a documented property of
nanosleep().
Fixes a problem where sleep() in a threaded program would return
nonzero even on success.
- enable concurrency according to environment variable PTHREAD_CONCURRENCY
- add idle VP wakeup if there are additional jobs and idle VPs
- make reidlequeue per VP
- enable spinning for locks
- fix race condition in alarm processing
- fix race condition in mutex locking
- make debugging output line buffered and add VP prefix to debug lines
- simplify handling of blocked idle threads.
This should fix the ``assertion "target->pt_state != PT_STATE_RUNNING
|| target->pt_blockgen != target->pt_unblockgen" failed'' problem
reported by Marc Recht and Steve Bellovin on current-users.
Also g/c unused pthread__sched_bulk call left over from pthread_sa.c
rev. 1.22 change.
- return EPERM when unlocking a lock which isn't held
=> prevent the failure in PR 24023, where the citrus code had a deadlocking
code path
- remove deadlock check in pthread_rwlock_tryrdlock, return EBUSY instead
=> makes pthread_rwlock_tryrdlock standards compliant
- strong alias __sigprocmask14 to pthread_sigmask
- call _sys___sigprocmask14 where appropriate
- make pthread_sigmask not set the signal mask lazily when pthreads
aren't started yet
- add pt_stackinfo to struct __pthread_st
- add pthread__stackinfo_offset returning the offset from ss_sp to
pt_stackinfo
- pass stackinfo_offset to sa_register and set SA_FLAG_STACKINFO to
make the kernel use it
- call pthread__sa_recycle in pthread__resolve_locks; g/c recycleq and
pthread__recycle_bulk
- return stack in pthread__sa_recycle by incrementing sasi_stackgen
- make pthread__sa_recycle debugging output formatting conditional on
pthread__debug_newline
