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* Remove $FreeBSD$: one-line .h patternWarner Losh2023-08-231-1/+0
| | | | | | | Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/ Similar commit in main: (cherry picked from commit 42b388439bd3)
* rtld: workaround for broken ABIKonstantin Belousov2021-04-231-0/+3
| | | | (cherry picked from commit 08bfbd43594b7642de0d2487550f36b0ee1eceba)
* Add pthread_getname_np() and pthread_setname_np() aliases forKonstantin Belousov2020-06-101-0/+2
| | | | | | | | | | | | | | | pthread_get_name_np() and pthread_set_name_np(). This re-applies r361770 after compatibility fixes. Reviewed by: antoine, jkim, markj Tested by: antoine (exp-run) Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D25117 Notes: svn path=/head/; revision=362032
* Revert r361770 "Add pthread_getname_np() and pthread_setname_np() aliases" ↵Konstantin Belousov2020-06-041-2/+0
| | | | | | | | | | | | for now. It is not compatible enough with Linux. Requested by: antoine, jkim Sponsored by: The FreeBSD Foundation Notes: svn path=/head/; revision=361784
* Add pthread_getname_np() and pthread_setname_np() aliasesKonstantin Belousov2020-06-031-0/+2
| | | | | | | | | | | | | | for pthread_get_name_np() and pthread_set_name_np(), to be compatible with Linux. PR: 238404 Proposed and reviewed by: markj Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D25117 Notes: svn path=/head/; revision=361770
* Add pthread_peekjoin_np(3).Konstantin Belousov2020-02-151-0/+4
| | | | | | | | | | | | | | The function allows to peek at the thread exit status and even see return value, without joining (and thus finally destroying) the target thread. Reviewed by: markj Sponsored by: The FreeBSD Foundation (kib) MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D23676 Notes: svn path=/head/; revision=357985
* Fix initial exec TLS mode for dynamically loaded shared objects.Konstantin Belousov2019-03-291-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | If dso uses initial exec TLS mode, rtld tries to allocate TLS in static space. If there is no space left, the dlopen(3) fails. If space if allocated, initial content from PT_TLS segment is distributed to all threads' pcbs, which was missed and caused un-initialized TLS segment for such dso after dlopen(3). The mode is auto-detected either due to the relocation used, or if the DF_STATIC_TLS dynamic flag is set. In the later case, the TLS segment is tried to allocate earlier, which increases chance of the dlopen(3) to succeed. LLD was recently fixed to properly emit the flag, ld.bdf did it always. Initial test by: dumbbell Tested by: emaste (amd64), ian (arm) Tested by: Gerald Aryeetey <aryeeteygerald_rogers.com> (arm64) Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D19072 Notes: svn path=/head/; revision=345703
* Add pthread_get_name_np(3).Konstantin Belousov2018-08-171-0/+4
| | | | | | | | | | | | | | | | The function retrieves the thread name previously set by pthread_set_name_np(3). The name is cached in the process memory. Requested by: Willem Jan Withagen <wjw@digiware.nl> Man page update: Yuri Pankov <yuripv@yuripv.net> Reviewed by: ian (previous version) Discussed with: arichardson, bjk (man page) Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Differential revision: https://reviews.freebsd.org/D16702 Notes: svn path=/head/; revision=337983
* Add implementation of robust mutexes, hopefully close enough to theKonstantin Belousov2016-05-171-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | intention of the POSIX IEEE Std 1003.1TM-2008/Cor 1-2013. A robust mutex is guaranteed to be cleared by the system upon either thread or process owner termination while the mutex is held. The next mutex locker is then notified about inconsistent mutex state and can execute (or abandon) corrective actions. The patch mostly consists of small changes here and there, adding neccessary checks for the inconsistent and abandoned conditions into existing paths. Additionally, the thread exit handler was extended to iterate over the userspace-maintained list of owned robust mutexes, unlocking and marking as terminated each of them. The list of owned robust mutexes cannot be maintained atomically synchronous with the mutex lock state (it is possible in kernel, but is too expensive). Instead, for the duration of lock or unlock operation, the current mutex is remembered in a special slot that is also checked by the kernel at thread termination. Kernel must be aware about the per-thread location of the heads of robust mutex lists and the current active mutex slot. When a thread touches a robust mutex for the first time, a new umtx op syscall is issued which informs about location of lists heads. The umtx sleep queues for PP and PI mutexes are split between non-robust and robust. Somewhat unrelated changes in the patch: 1. Style. 2. The fix for proper tdfind() call use in umtxq_sleep_pi() for shared pi mutexes. 3. Removal of the userspace struct pthread_mutex m_owner field. 4. The sysctl kern.ipc.umtx_vnode_persistent is added, which controls the lifetime of the shared mutex associated with a vnode' page. Reviewed by: jilles (previous version, supposedly the objection was fixed) Discussed with: brooks, Martin Simmons <martin@lispworks.com> (some aspects) Tested by: pho Sponsored by: The FreeBSD Foundation Notes: svn path=/head/; revision=300043
* If libthr.so is dlopened without RTLD_GLOBAL flag, the libthr symbolsKonstantin Belousov2016-02-081-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | do not participate in the global symbols namespace, but rtld locks are still replaced and functions are interposed. In particular, __pthread_map_stacks_exec is resolved to the libc version. If a library is loaded later, which requires adjustment of the stack protection mode, rtld calls into libc __pthread_map_stacks_exec due to the symbols scope. The libc version might recurse into binder and recursively acquire rtld bind lock, causing the hang. Make libc __pthread_map_stacks_exec() interposed, which synchronizes rtld locks and version of the stack exec hook when libthr loaded, regardless of the symbol scope control or symbol resolution order. The __pthread_map_stacks_exec() symbol is removed from the private version in libthr since libc symbol now operates correctly in presence of libthr. Reported and tested by: markj Sponsored by: The FreeBSD Foundation MFC after: 2 weeks Notes: svn path=/head/; revision=295407
* Fix known issues which blow up the process after dlopen("libthr.so")Konstantin Belousov2015-01-031-96/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (or loading a dso linked to libthr.so into process which was not linked against threading library). - Remove libthr interposers of the libc functions, including __error(). Instead, functions calls are indirected through the interposing table, similar to how pthread stubs in libc are already done. Libc by default points either to syscall trampolines or to existing libc implementations. On libthr load, libthr rewrites the pointers to the cancellable implementations already in libthr. The interposition table is separate from pthreads stubs indirection table to not pull pthreads stubs into static binaries. - Postpone the malloc(3) internal mutexes initialization until libthr is loaded. This avoids recursion between calloc(3) and static pthread_mutex_t initialization. - Reinstall signal handlers with wrapper on libthr load. The _rtld_is_dlopened(3) is used to avoid useless calls to sigaction(2) when libthr is statically referenced from the main binary. In the process, fix openat(2), swapcontext(2) and setcontext(2) interposing. The libc symbols were exported at different versions than libthr interposers. Export both libc and libthr versions from libc now, with default set to the higher version from libthr. Remove unused and disconnected swapcontext(3) userspace implementation from libc/gen. No objections from: deischen Tested by: pho, antoine (exp-run) (previous versions) Sponsored by: The FreeBSD Foundation MFC after: 1 week Notes: svn path=/head/; revision=276630
* Add accept4() system call.Jilles Tjoelker2013-05-011-0/+5
| | | | | | | | | | | | | | | | | | The accept4() function, compared to accept(), allows setting the new file descriptor atomically close-on-exec and explicitly controlling the non-blocking status on the new socket. (Note that the latter point means that accept() is not equivalent to any form of accept4().) The linuxulator's accept4 implementation leaves a race window where the new file descriptor is not close-on-exec because it calls sys_accept(). This implementation leaves no such race window (by using falloc() flags). The linuxulator could be fixed and simplified by using the new code. Like accept(), accept4() is async-signal-safe, a cancellation point and permitted in capability mode. Notes: svn path=/head/; revision=250154
* Introduce a non-portable function pthread_getthreadid_np(3) to retrieveJung-uk Kim2011-02-071-0/+2
| | | | | | | | | | calling thread's unique integral ID, which is similar to AIX function of the same name. Bump __FreeBSD_version to note its introduction. Reviewed by: kib Notes: svn path=/head/; revision=218414
* Implement the __pthread_map_stacks_exec() for libthr.Konstantin Belousov2011-01-091-0/+2
| | | | | | | | | | | | | | | Stack creation code is changed to call _rtld_get_stack_prot() to get the stack protection right. There is a race where thread is created during dlopen() of dso that requires executable stacks. Then, _rtld_get_stack_prot() may return PROT_READ | PROT_WRITE, but thread is still not linked into the thread list. In this case, the callback misses the thread stack, and rechecks the required protection afterward. Reviewed by: davidxu Notes: svn path=/head/; revision=217191
* Revert revision 214007, I realized that MySQL wants to resolveDavid Xu2010-10-201-4/+0
| | | | | | | | | | a silly rwlock deadlock problem, the deadlock is caused by writer waiters, if a thread has already locked a reader lock, and wants to acquire another reader lock, it will be blocked by writer waiters, but we had already fixed it years ago. Notes: svn path=/head/; revision=214093
* sort function name.David Xu2010-10-181-2/+2
| | | | Notes: svn path=/head/; revision=214009
* Add pthread_rwlockattr_setkind_np and pthread_rwlockattr_getkind_np, theDavid Xu2010-10-181-0/+4
| | | | | | | | | | | | functions set or get pthread_rwlock type, current supported types are: PTHREAD_RWLOCK_PREFER_READER_NP, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, PTHREAD_RWLOCK_PREFER_WRITER_NP, default is PTHREAD_RWLOCK_PREFER_WRITER_NONCECURSIVE_NP, this maintains binary compatible with old code. Notes: svn path=/head/; revision=214007
* To support stack unwinding for cancellation points, add -fexceptions flagDavid Xu2010-09-251-0/+2
| | | | | | | | | | for them, two functions _pthread_cancel_enter and _pthread_cancel_leave are added to let thread enter and leave a cancellation point, it also makes it possible that other functions can be cancellation points in libraries without having to be rewritten in libthr. Notes: svn path=/head/; revision=213153
* Update symbol.David Xu2010-09-131-1/+1
| | | | Notes: svn path=/head/; revision=212548
* Add wrapper for setcontext() and swapcontext(), the wrappersDavid Xu2010-08-241-0/+4
| | | | | | | unblock SIGCANCEL which is needed by thread cancellation. Notes: svn path=/head/; revision=211737
* On shared object unload, in __cxa_finalize, call and clear all installedKonstantin Belousov2010-08-231-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | atexit and __cxa_atexit handlers that are either installed by unloaded dso, or points to the functions provided by the dso. Use _rtld_addr_phdr to locate segment information from the address of private variable belonging to the dso, supplied by crtstuff.c. Provide utility function __elf_phdr_match_addr to do the match of address against dso executable segment. Call back into libthr from __cxa_finalize using weak __pthread_cxa_finalize symbol to remove any atfork handler which function points into unloaded object. The rtld needs private __pthread_cxa_finalize symbol to not require resolution of the weak undefined symbol at initialization time. This cannot work, since rtld is relocated before sym_zero is set up. Idea by: kan Reviewed by: kan (previous version) MFC after: 3 weeks Notes: svn path=/head/; revision=211706
* Remove extra new semaphore stubs, because libc already has them, andDavid Xu2010-01-051-7/+0
| | | | | | | | | ld can find the newest version which is default. Poked by: kan@ Notes: svn path=/head/; revision=201559
* Use umtx to implement process sharable semaphore, to make this work,David Xu2010-01-051-14/+7
| | | | | | | | | | | | | | | | | | | | | | | | | now type sema_t is a structure which can be put in a shared memory area, and multiple processes can operate it concurrently. User can either use mmap(MAP_SHARED) + sem_init(pshared=1) or use sem_open() to initialize a shared semaphore. Named semaphore uses file system and is located in /tmp directory, and its file name is prefixed with 'SEMD', so now it is chroot or jail friendly. In simplist cases, both for named and un-named semaphore, userland code does not have to enter kernel to reduce/increase semaphore's count. The semaphore is designed to be crash-safe, it means even if an application is crashed in the middle of operating semaphore, the semaphore state is still safely recovered by later use, there is no waiter counter maintained by userland code. The main semaphore code is in libc and libthr only has some necessary stubs, this makes it possible that a non-threaded application can use semaphore without linking to thread library. Old semaphore implementation is kept libc to maintain binary compatibility. The kernel ksem API is no longer used in the new implemenation. Discussed on: threads@ Notes: svn path=/head/; revision=201546
* Make openat(2) a cancellation point.Jilles Tjoelker2009-10-111-0/+5
| | | | | | | | | | This is required by POSIX and matches open(2). Reviewed by: kib, jhb MFC after: 1 month Notes: svn path=/head/; revision=197968
* Make pthread_cleanup_push() and pthread_cleanup_pop() as a pair of macros,David Xu2008-06-091-0/+2
| | | | | | | | | | use stack space to keep cleanup information, this eliminates overhead of calling malloc() and free() in thread library. Discussed on: thread@ Notes: svn path=/head/; revision=179662
* Add POSIX pthread API pthread_getcpuclockid() to get a thread's cpuDavid Xu2008-03-221-0/+2
| | | | | | | time clock id. Notes: svn path=/head/; revision=177494
* Add more cpu affinity function's symbols.David Xu2008-03-051-0/+6
| | | | Notes: svn path=/head/; revision=176816
* Implement functions pthread_getaffinity_np and pthread_setaffinity_np toDavid Xu2008-03-031-1/+3
| | | | | | | get and set thread's cpu affinity mask. Notes: svn path=/head/; revision=176763
* Yet another pointy hat: when I zapped FBSDprivate_1.1, I forgot to moveDag-Erling Smørgrav2008-02-061-0/+1
| | | | | | | its contents to FBSDprivate_1.0. Notes: svn path=/head/; revision=176061
* Convert pthread.map to the format expected by version_gen.awk, and modifyDag-Erling Smørgrav2008-02-061-10/+1
| | | | | | | | | the Makefile accordingly; libthr now explicitly uses libc's Versions.def. MFC after: 2 weeks Notes: svn path=/head/; revision=176054
* Remove incorrectly added FBSDprivate_1.1 namespace, and move symbols whichDag-Erling Smørgrav2008-02-061-12/+4
| | | | | | | are new in FreeBSD 8 to the appropriate namespace. Notes: svn path=/head/; revision=176053
* Per discussion on -threads, rename _islocked_np() to _isowned_np().Dag-Erling Smørgrav2008-02-061-2/+2
| | | | Notes: svn path=/head/; revision=176049
* Add pthread_mutex_islocked_np(), a cheap way to verify that a mutex isDag-Erling Smørgrav2008-02-031-0/+15
| | | | | | | | | | locked. This is intended primarily to support the userland equivalent of the various *_ASSERT_LOCKED() macros we have in the kernel. MFC after: 2 weeks Notes: svn path=/head/; revision=175958
* Remove vfork() overloading, it is no longer needed.David Xu2007-12-201-2/+0
| | | | Notes: svn path=/head/; revision=174805
* 1. Add function pthread_mutex_setspinloops_np to turn a mutex's spinDavid Xu2007-12-141-0/+8
| | | | | | | | | | | loop count. 2. Add function pthread_mutex_setyieldloops_np to turn a mutex's yield loop count. 3. Make environment variables PTHREAD_SPINLOOPS and PTHREAD_YIELDLOOPS to be only used for turnning PTHREAD_MUTEX_ADAPTIVE_NP mutex. Notes: svn path=/head/; revision=174585
* Add _pthread_mutex_init_calloc_cb() to libthr and libkse, so that malloc(3)Jason Evans2007-11-271-0/+1
| | | | | | | | (part of libc) can use pthreads mutexes without causing infinite recursion during initialization. Notes: svn path=/head/; revision=173967
* Enable symbol versioning by default. Use WITHOUT_SYMVER to disable it.Daniel Eischen2007-05-131-374/+0
| | | | | | | | | | | | | Warning, after symbol versioning is enabled, going back is not easy (use WITHOUT_SYMVER at your own risk). Change the default thread library to libthr. There most likely still needs to be a version bump for at least the thread libraries. If necessary, this will happen later. Notes: svn path=/head/; revision=169524
* Use C comments since we now preprocess these files with CPP.Daniel Eischen2007-04-291-11/+14
| | | | Notes: svn path=/head/; revision=169092
* 1. Don't override underscore version of aio_suspend(), system(),David Xu2006-07-251-22/+22
| | | | | | | | | | | | | wait(), waitpid() and usleep(), they are internal versions and should not be cancellation points. 2. Make wait3() as a cancellation point. 3. Move raise() and pause() into file thr_sig.c. 4. Add functions _sigsuspend, _sigwait, _sigtimedwait and _sigwaitinfo, remove SIGCANCEL bit in wait-set for those functions, the signal is used internally to implement thread cancellation. Notes: svn path=/head/; revision=160662
* Add symbol versions: FBSD_1.0 and FBSDprivate.David Xu2006-05-111-3/+387
| | | | Notes: svn path=/head/; revision=158425
* WARNS level 4 cleanup.David Xu2006-04-041-13/+8
| | | | Notes: svn path=/head/; revision=157457
* Remove mqueue and timer, now they are in librt.David Xu2006-03-081-8/+0
| | | | Notes: svn path=/head/; revision=156452
* 1. Add SIGEV_THREAD notification for mq_notify.David Xu2006-01-041-0/+4
| | | | | | | | 2. Reuse current timer code and abstract some common code to to support both timer and mqueue. Notes: svn path=/head/; revision=154021
* Follow the mistake in libpthread, the first version name in libpthreadDavid Xu2005-12-211-1/+1
| | | | | | | | | is LIBTHREAD_1_0, but really it should be LIBPTHREAD_1_0. Fix it so libmap.conf works again (it was broken by recent versioning code in rtld_elf). Notes: svn path=/head/; revision=153591
* Add code to handle timer_delete(). The timer wrapper code is completelyDavid Xu2005-11-011-0/+2
| | | | | | | | | rewritten, now timers created with same sigev_notify_attributes will run in same thread, this allows user to organize which timers can run in same thread to save some thread resource. Notes: svn path=/head/; revision=151922
* Add timer_create wrapper.David Xu2005-10-301-0/+2
| | | | Notes: svn path=/head/; revision=151871
* Put pthread_condattr_init sorted order.David Xu2005-10-251-1/+1
| | | | Notes: svn path=/head/; revision=151637
* Export following functions:David Xu2005-10-241-0/+6
| | | | | | | | | | | | _pthread_mutexattr_getpshared _pthread_mutexattr_setpshared pthread_condattr_getpshared pthread_condattr_setpshared pthread_mutexattr_getpshared pthread_mutexattr_setpshared Notes: svn path=/head/; revision=151609
* Sort function names.David Xu2005-10-041-2/+2
| | | | Notes: svn path=/head/; revision=150904
* Add function pthread_timedjoin_np, the function is similar with pthread_joinDavid Xu2005-10-041-0/+2
| | | | | | | | except the function will return ETIMEDOUT if target thread does not exit before specified absolute time passes. Notes: svn path=/head/; revision=150901
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