src/lib/libpthread/sys, branch release/5.4.0 FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=release%2F5.4.0 2005-02-04T16:17:55Z MFC Most of the various fixes and changes to libpthread from HEAD to 5.x 2005-02-04T16:17:55Z John Baldwin jhb@FreeBSD.org 2005-02-04T16:17:55Z urn:sha1:db881d543a1ed25e28ddd99393c3bcd05c7e571d including: Pull debug symbols in for statically linked binaries. gcc -O2 cleanups. Don't call _thr_start_sig_daemon() when SYSTEM_SCOPE_ONLY is defined. If a system scope thread didn't set a timeout, don't call the clock_gettime system call before and after sleeping. Add missing reference count drops to close a memory leak. Save cancelflags in signal frame. Use a generic way to back threads out of wait queues when handling signals instead of having more intricate knowledge of thread state within signal handling. Simplify signal code because of above (by David Xu). Use macros for libpthread usage of pthread_cleanup_push() and pthread_cleanup_pop(). This removes some instances of malloc() and free() from the semaphore and pthread_once() implementations. When single threaded and forking(), make sure that the current thread's signal mask is inherited by the forked thread. Use private mutexes for libc and libpthread. Signals are deferred while threads hold private mutexes. This fix breaks an internal system ABI that old versions of the www/linuxpluginwrapper port depend on. Upgrading that port to the latest version will fix that. Fix race condition in condition variables where handling a signal (pthread_kill() or kill()) may not see a wakeup (pthread_cond_signal() or pthread_cond_broadcast()). Don't panic when sigsuspend is interrupted by a cancellation. Add the ability to reinitialize libpthread's internal FIFO-queueing 2003-11-04T20:01:38Z Daniel Eischen deischen@FreeBSD.org 2003-11-04T20:01:38Z urn:sha1:d6b826bac7cba8bd901ca2db952bb1dc514ca79f locks. Reviewed by: davidxu Only generate code for _LCK_ASSERT if _LCK_DEBUG is defined. 2003-10-02T03:24:26Z David Xu davidxu@FreeBSD.org 2003-10-02T03:24:26Z urn:sha1:28e2ce478d04a60f22169aedfce85d93c1ed3328 Don't assume sizeof(long) = sizeof(int) on x86; use int 2003-09-03T17:56:26Z Daniel Eischen deischen@FreeBSD.org 2003-09-03T17:56:26Z urn:sha1:850108c0b4ef4545310af9b03c4a8531b8b36d55 instead of long types for low-level locks. Add prototypes for some internal libc functions that are wrapped by the library as cancellation points. Add memory barriers to alpha atomic swap functions (submitted by davidxu). Requested by: bde Move the machine specific files from sys/Makefile.inc and put them 2003-06-23T04:28:31Z Marcel Moolenaar marcel@FreeBSD.org 2003-06-23T04:28:31Z urn:sha1:842728619a412d2ce3a8c4c5ba4ac60a9a77726c in a machine specific makefile. While here, sort the sub-directories in Makefile and remove _atomic_lock.S from all makefiles. Attempt to eliminate PLT relocations from rwlock aquire/release 2003-05-30T00:21:52Z Alexander Kabaev kan@FreeBSD.org 2003-05-30T00:21:52Z urn:sha1:84d55c7fad83f4fa1330cc8c2206da8ebd0b300d path, making them suitable for direct use by the dynamic loader. Register libpthread-specific locking API with rtld on startup. This still has some rough edges with signals which should be addresses later. Approved by: re (scottl) Change low-level locking a bit so that we can tell if 2003-05-24T02:29:25Z Daniel Eischen deischen@FreeBSD.org 2003-05-24T02:29:25Z urn:sha1:1cb570c53190e8b569091f708781c6bf9c3126c7 a lock is being waitied on. Fix a races in join and cancellation. When trying to wait on a CV and the library is not yet threaded, make it threaded so that waiting actually works. When trying to nanosleep() and we're not threaded, just call the system call nanosleep instead of adding the thread to the wait queue. Clean up adding/removing new threads to the "all threads queue", assigning them unique ids, and tracking how many active threads there are. Do it all when the thread is added to the scheduling queue instead of making pthread_create() know how to do it. Fix a race where a thread could be marked for signal delivery but it could be exited before we actually add the signal to it. Other minor cleanups and bug fixes. Submitted by: davidxu Approved by: re@ (blanket for libpthread) Add a method of yielding the current thread with the scheduler 2003-05-16T19:58:30Z Daniel Eischen deischen@FreeBSD.org 2003-05-16T19:58:30Z urn:sha1:fd626336fd97bad05a86f02b646c66d2fe14d01a lock held (_thr_sched_switch_unlocked()) and use this to avoid dropping the scheduler lock and having the scheduler retake the same lock again. Add a better way of detecting if a low-level lock is in use. When switching out a thread due to blocking in the UTS, don't switch to the KSE's scheduler stack only to switch back to another thread. If possible switch to the new thread directly from the old thread and avoid the overhead of the extra context switch. Check for pending signals on a thread when entering the scheduler and add them to the threads signal frame. This includes some other minor signal fixes. Most of this was a joint effor between davidxu and myself. Reviewed by: davidxu Approved by: re@ (blanket for libpthread) Protect against a race between granting a lock and accessing 2003-05-04T22:29:09Z Daniel Eischen deischen@FreeBSD.org 2003-05-04T22:29:09Z urn:sha1:c72cd7c9e2e07a2c466f0f61ece3cfc2e464218c other parts of the lock. Submitted by: davidxu Protect thread errno from being changed while operating 2003-04-23T21:46:50Z Daniel Eischen deischen@FreeBSD.org 2003-04-23T21:46:50Z urn:sha1:f1c8192fd426ea8d3256f3a25b7aa9d3dac7f3a4 on behalf of the KSE. Add a kse_reinit function to reinitialize a reused KSE. Submitted by: davidxu