David Xu 9b0f1823b5 Use umtx to implement process sharable semaphore, to make this work, ... 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@		2010-01-05 02:37:59 +00:00
..
bus_if.m	Add a facility for associating optional descriptions with active interrupt	2009-10-15 14:54:35 +00:00
clock_if.m
cpufreq_if.m
device_if.m
genassym.sh
imgact_aout.c	Add sv_flags field to struct sysentvec with intention to provide description	2008-11-22 12:36:15 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c	If ET_DYN binary has non-zero base address for some reason, honour it	2009-10-18 12:57:48 +00:00
imgact_gzip.c
imgact_shell.c	Decontextualize the couplet VOP_GETATTR / VOP_SETATTR as the passed thread	2008-08-28 15:23:18 +00:00
inflate.c
init_main.c	Random number generator initialization cleanup:	2009-10-20 16:36:51 +00:00
init_sysent.c	Regenerate	2009-10-27 11:01:15 +00:00
kern_acct.c	Do not use casts (int *)0 and (struct thread *)0 for the arguments of	2009-06-16 15:13:45 +00:00
kern_alq.c	Add another flags argument to vn_open_cred. Use it to specify that some	2009-06-21 13:41:32 +00:00
kern_clock.c	Mark the clock sysctls as MPSAFE.	2009-05-18 12:03:43 +00:00
kern_condvar.c	Remove unused variables p' and unneeded assignments of rval'.	2009-02-26 13:00:13 +00:00
kern_conf.c	Update d_mmap() to accept vm_ooffset_t and vm_memattr_t.	2009-12-29 21:51:28 +00:00
kern_cons.c	Allow multiple console devices per driver without insane code duplication.	2009-08-24 10:53:30 +00:00
kern_context.c	In r197963, a race with thread being selected for signal delivery	2009-10-27 10:47:58 +00:00
kern_cpu.c	Provide a new CPU device driver ivar to report the nominal speed of the	2009-05-31 08:59:15 +00:00
kern_cpuset.c	Another nit that both I and ispell missed.	2009-10-26 18:32:06 +00:00
kern_ctf.c	Add the CTF source file which gets shared with link_elf.c and link_elf_obj.c.	2008-05-23 03:04:27 +00:00
kern_descrip.c	On the return path from F_RDAHEAD and F_READAHEAD fcntls, do not	2009-11-20 22:22:53 +00:00
kern_dtrace.c	Remove code that isn't required. It actually breaks the case where KDTRACE_HOOKS	2008-06-16 04:44:29 +00:00
kern_environment.c	Move "options MAC" from opt_mac.h to opt_global.h, as it's now in GENERIC	2009-06-05 14:55:22 +00:00
kern_event.c	If a filter has already been added, actually return EEXIST when trying	2009-12-31 20:56:28 +00:00
kern_exec.c	- Fix several off-by-one errors when using MAXCOMLEN. The p_comm[] and	2009-10-23 15:14:54 +00:00
kern_exit.c	Let access overriding to TTYs depend on the cdev_priv, not the vnode.	2009-12-19 18:42:12 +00:00
kern_fail.c	fail(9) support:	2009-05-27 16:36:54 +00:00
kern_fork.c	Reintroduce the r196640, after fixing the problem with my testing.	2009-09-01 11:41:51 +00:00
kern_idle.c	Split P_NOLOAD into a per-thread flag (TDF_NOLOAD).	2009-11-03 16:46:52 +00:00
kern_intr.c	Split P_NOLOAD into a per-thread flag (TDF_NOLOAD).	2009-11-03 16:46:52 +00:00
kern_jail.c	(S)LIST_HEAD_INITIALIZER takes a (S)LIST_HEAD as an argument.	2009-12-28 22:56:30 +00:00
kern_kthread.c	Reintroduce the r196640, after fixing the problem with my testing.	2009-09-01 11:41:51 +00:00
kern_ktr.c
kern_ktrace.c	- Fix several off-by-one errors when using MAXCOMLEN. The p_comm[] and	2009-10-23 15:14:54 +00:00
kern_linker.c	- Unbreak build with KLD_DEBUG defined	2009-11-17 21:56:12 +00:00
kern_lock.c	In current code, threads performing an interruptible sleep (on both	2009-12-12 21:31:07 +00:00
kern_lockf.c	In lf_iteratelocks_vnode, increment state->ls_threads around iterating	2009-06-25 18:54:56 +00:00
kern_lockstat.c	Add the OpenSolaris dtrace lockstat provider. The lockstat provider	2009-05-26 20:28:22 +00:00
kern_malloc.c	If we're passed garbage in malloc_init(), panic() rather than expecting	2009-06-05 09:16:52 +00:00
kern_mbuf.c	Add support to the virtual memory system for configuring machine-	2009-07-12 23:31:20 +00:00
kern_mib.c	Add a new sysctl for reporting all of the supported page sizes.	2009-09-18 17:04:57 +00:00
kern_module.c	When the SYSINIT() to load a module invokes the MOD_LOAD event successfully,	2008-12-05 16:47:30 +00:00
kern_mtxpool.c	Fix a number of style issues in the MALLOC / FREE commit. I've tried to	2008-10-23 20:26:15 +00:00
kern_mutex.c	Revert previous commit and add myself to the list of people who should	2009-09-08 13:19:05 +00:00
kern_ntptime.c
kern_osd.c	Make the rmlock(9) interface a bit more like the rwlock(9) interface:	2009-05-29 10:52:37 +00:00
kern_physio.c
kern_pmc.c	Support sparsely numbered CPUs.	2008-09-22 10:37:02 +00:00
kern_poll.c	Rather than fix questionable ifnet list locking in the implementation of	2009-08-15 23:07:43 +00:00
kern_priv.c	Move "options MAC" from opt_mac.h to opt_global.h, as it's now in GENERIC	2009-06-05 14:55:22 +00:00
kern_proc.c	Remove an unused global.	2009-12-25 20:03:03 +00:00
kern_prot.c	Remove the interim vimage containers, struct vimage and struct procg,	2009-07-17 14:48:21 +00:00
kern_resource.c	Implement global and per-uid accounting of the anonymous memory. Add	2009-06-23 20:45:22 +00:00
kern_rmlock.c	Remove extra spaces (no functional change).	2009-12-25 21:14:05 +00:00
kern_rwlock.c	When releasing a read/shared lock we need to use a write memory barrier	2009-09-30 13:26:31 +00:00
kern_sdt.c
kern_sema.c
kern_shutdown.c	Don't bother copying the name of a kproc or kthread out into a temporary	2009-10-23 15:09:51 +00:00
kern_sig.c	Remove wrong assertion. Debugee is allowed to lose a signal.	2009-12-03 20:16:59 +00:00
kern_subr.c	Constify prime numbers.	2009-08-23 09:55:06 +00:00
kern_switch.c	- Use DPCPU for SCHED_STATS. This is somewhat awkward because the	2009-06-25 01:33:51 +00:00
kern_sx.c	In current code, threads performing an interruptible sleep (on both	2009-12-12 21:31:07 +00:00
kern_synch.c	Add new msleep(9) flag PBDY that shall be specified together with	2009-07-14 22:52:46 +00:00
kern_syscalls.c	Various style fixes. 7 space indent is just odd.	2008-09-18 20:10:11 +00:00
kern_sysctl.c	Make it possible to change the vnet sysctl variables on jails	2009-08-13 10:26:34 +00:00
kern_tc.c	Remove conditionally compiled time counter statistics; tools like	2009-04-11 22:01:40 +00:00
kern_thr.c	Currently, when signal is delivered to the process and there is a thread	2009-10-11 16:49:30 +00:00
kern_thread.c	Inform hwpmc(4) of a thread's impending demise prior to invoking sched_throw().	2009-10-25 04:34:47 +00:00
kern_time.c	Remove VOP_LEASE and supporting functions. This hasn't been used since	2009-04-10 10:52:19 +00:00
kern_timeout.c	Properly fix callout handling by putting all the per-cpu info in	2009-12-14 12:23:46 +00:00
kern_umtx.c	Add user-level semaphore synchronous type, this change allows multiple	2010-01-04 05:27:49 +00:00
kern_uuid.c	Rework global locks for interface list and index management, correcting	2009-08-23 20:40:19 +00:00
kern_xxx.c	Place hostnames and similar information fully under the prison system.	2009-05-29 21:27:12 +00:00
ksched.c
link_elf_obj.c	Add macros VNET_SETNAME and VNET_SYMPREFIX, and expose to userspace if	2009-07-20 07:50:50 +00:00
link_elf.c	Build on Jeff Roberson's linker-set based dynamic per-CPU allocator	2009-07-14 22:48:30 +00:00
linker_if.m	strict kobj signatures: linker_if fixes	2009-06-11 17:05:45 +00:00
Make.tags.inc	Catch up with the disappearance of sys/dev/hfa.	2008-12-01 14:34:42 +00:00
Makefile
makesyscalls.sh	Add a new COMPAT7 flag for FreeBSD 7.x compatibility system calls.	2009-06-24 13:36:37 +00:00
md4c.c
md5c.c
p1003_1b.c
posix4_mib.c
sched_4bsd.c	Allow swap out of the kernel stack for the thread with priority greater	2009-12-31 18:52:58 +00:00
sched_ule.c	Allow swap out of the kernel stack for the thread with priority greater	2009-12-31 18:52:58 +00:00
serdev_if.m
stack_protector.c	Random number generator initialization cleanup:	2009-10-20 16:36:51 +00:00
subr_acl_nfs4.c	Fix comments.	2010-01-04 12:39:42 +00:00
subr_acl_posix1e.c	Now that all the callers seem to be fixed, add KASSERTs to make sure VAPPEND	2009-12-26 11:36:10 +00:00
subr_autoconf.c	Prefer ANSI function definitions to K&R ones.	2009-02-03 07:52:07 +00:00
subr_blist.c	Retire the MALLOC and FREE macros. They are an abomination unto style(9).	2008-10-23 15:53:51 +00:00
subr_bufring.c	- bump __FreeBSD version to reflect added buf_ring, memory barriers,	2008-11-22 05:55:56 +00:00
subr_bus.c	Actually set RLE_ALLOCATED when allocating a reserved resource so that	2009-12-30 22:37:28 +00:00
subr_clock.c
subr_devstat.c	Update d_mmap() to accept vm_ooffset_t and vm_memattr_t.	2009-12-29 21:51:28 +00:00
subr_disk.c	Clarify and reimplement the bioq API so that bioq_disksort() has	2009-02-13 11:36:32 +00:00
subr_eventhandler.c	If the runcount is non-zero in eventhandler_deregister() then one or more	2009-12-17 21:17:13 +00:00
subr_fattime.c
subr_firmware.c	Use NULL in preference to 0 for pointers.	2009-02-03 07:51:11 +00:00
subr_hints.c
subr_kdb.c	* Completely Remove the option STOP_NMI from the kernel. This option	2009-08-13 17:09:45 +00:00
subr_kobj.c	Use NULL in preference to 0 in pointer contexts.	2009-02-03 07:54:42 +00:00
subr_lock.c	- Implement a new mechanism for resetting lock profiling. We now	2009-03-15 06:41:47 +00:00
subr_log.c	Make /dev/klog and kern.msgbuf* MPSAFE.	2009-11-03 21:06:19 +00:00
subr_mbpool.c
subr_mchain.c
subr_module.c
subr_msgbuf.c
subr_param.c	Increase HZ_VM from 10 to 100. While 10 hz saves cpu time	2009-07-08 01:09:12 +00:00
subr_pcpu.c	Add ddb show dpcpu_off command to ease dpcpu memory debugging.	2009-08-12 12:06:16 +00:00
subr_power.c
subr_prf.c	Make /dev/klog and kern.msgbuf* MPSAFE.	2009-11-03 21:06:19 +00:00
subr_prof.c	Use ANSI function definition for profil.	2009-02-03 07:52:36 +00:00
subr_rman.c	sysctl_rman: report shared resources to devinfo	2009-05-19 14:08:21 +00:00
subr_rtc.c	Clean up MI inittodr(9) and kill noop code.	2009-03-23 21:16:21 +00:00
subr_sbuf.c	Switch to simplified BSD license (with phk's approval), plus whitespace	2008-08-09 10:26:21 +00:00
subr_scanf.c
subr_sglist.c	This patch fixes two bugs in sglist(9) and improves robustness of the API via	2009-08-21 02:59:07 +00:00
subr_sleepqueue.c	In current code, threads performing an interruptible sleep (on both	2009-12-12 21:31:07 +00:00
subr_smp.c	Remove forward_roundrobin(), it is unused for quite some time.	2009-09-21 13:09:56 +00:00
subr_stack.c	Add stack_print_short() and stack_print_short_ddb() interfaces to	2009-06-24 12:06:15 +00:00
subr_taskqueue.c	- Fix several off-by-one errors when using MAXCOMLEN. The p_comm[] and	2009-10-23 15:14:54 +00:00
subr_trap.c	Current pselect(3) is implemented in usermode and thus vulnerable to	2009-10-27 10:55:34 +00:00
subr_turnstile.c	Fix indentation.	2009-12-20 22:55:27 +00:00
subr_unit.c
subr_witness.c	SLIP is gone; remove its mutex from witness.	2009-12-29 08:45:27 +00:00
sys_generic.c	Current pselect(3) is implemented in usermode and thus vulnerable to	2009-10-27 10:55:34 +00:00
sys_pipe.c	Use C99 initialization for struct filterops.	2009-09-12 20:03:45 +00:00
sys_process.c	Replace VM_PROT_OVERRIDE_WRITE by VM_PROT_COPY. VM_PROT_OVERRIDE_WRITE has	2009-11-26 05:16:07 +00:00
sys_socket.c	Merge the remainder of kern_vimage.c and vimage.h into vnet.c and	2009-08-01 19:26:27 +00:00
syscalls.c	Regenerate	2009-10-27 11:01:15 +00:00
syscalls.master	Current pselect(3) is implemented in usermode and thus vulnerable to	2009-10-27 10:55:34 +00:00
systrace_args.c	Regenerate	2009-10-27 11:01:15 +00:00
sysv_ipc.c	Change the ABI of some of the structures used by the SYSV IPC API:	2009-06-24 21:10:52 +00:00
sysv_msg.c	Change the ABI of some of the structures used by the SYSV IPC API:	2009-06-24 21:10:52 +00:00
sysv_sem.c	Change the ABI of some of the structures used by the SYSV IPC API:	2009-06-24 21:10:52 +00:00
sysv_shm.c	- Rename tunable kern.ipc.shmmaxpgs to kern.ipc.shmall.	2009-10-24 19:00:58 +00:00
tty_compat.c	Make TIOCSTI work again.	2010-01-04 20:59:52 +00:00
tty_info.c	Print an extra newline when not at the first column already.	2009-05-17 16:17:48 +00:00
tty_inq.c	Enable secure TTY input buffer flushing by default.	2009-05-21 16:48:06 +00:00
tty_outq.c	Use unsigned longs for the TTY's sysctl stats.	2009-02-26 10:28:32 +00:00
tty_pts.c	Make TIOCSTI work again.	2010-01-04 20:59:52 +00:00
tty_tty.c	Remove unneeded Giant locking of /dev/tty.	2008-06-03 12:38:00 +00:00
tty_ttydisc.c	Print backspaces after echoing an EOF.	2009-10-17 08:59:41 +00:00
tty.c	Make TIOCSTI work again.	2010-01-04 20:59:52 +00:00
uipc_accf.c	(S)LIST_HEAD_INITIALIZER takes a (S)LIST_HEAD as an argument.	2009-12-28 22:56:30 +00:00
uipc_cow.c	Extend the struct vm_page wire_count to u_int to avoid the overflow	2009-01-03 13:24:08 +00:00
uipc_debug.c	Add missing socket options.	2009-05-26 09:19:21 +00:00
uipc_domain.c	When registering a protocol to an existing protocol domain via	2009-08-24 10:03:41 +00:00
uipc_mbuf2.c	Move "options MAC" from opt_mac.h to opt_global.h, as it's now in GENERIC	2009-06-05 14:55:22 +00:00
uipc_mbuf.c	Add m_mbuftouio() helper function to copy(out) an arbitrary	2009-06-22 22:20:38 +00:00
uipc_mqueue.c	Use C99 initialization for struct filterops.	2009-09-12 20:03:45 +00:00
uipc_sem.c	Use umtx to implement process sharable semaphore, to make this work,	2010-01-05 02:37:59 +00:00
uipc_shm.c	Implement global and per-uid accounting of the anonymous memory. Add	2009-06-23 20:45:22 +00:00
uipc_sockbuf.c	In sbappendstream_locked() demote all incoming packet mbufs (and	2009-06-22 21:46:40 +00:00
uipc_socket.c	Don't comment on stream socket handling in sosend_dgram, since that's	2009-10-02 21:31:15 +00:00
uipc_syscalls.c	Fix argument order in a call to mtx_init.	2009-12-17 00:22:56 +00:00
uipc_usrreq.c	Fix build on amd64, where sysctl arg1 is a pointer.	2009-10-05 22:23:12 +00:00
vfs_acl.c	Add change that was somehow missed in r192586. It could manifest by	2009-12-03 13:29:24 +00:00
vfs_aio.c	Use C99 initialization for struct filterops.	2009-09-12 20:03:45 +00:00
vfs_bio.c	When buffer write is failed, it is wrong for brelse() to invalidate	2009-07-19 20:25:59 +00:00
vfs_cache.c	Correctly handle unlock for !MAKEENTRY case, after successfull attempt of	2009-08-14 10:57:28 +00:00
vfs_cluster.c	Remove a stale comment. The very same revision (r85511) that introduced	2009-06-30 19:39:17 +00:00
vfs_default.c	Revert r198873. Having different VAPPEND semantics for VOP_ACCESS(9)	2009-11-11 13:49:22 +00:00
vfs_export.c	Set the prison in NFS anon and GSS SVC creds.	2009-09-28 18:07:16 +00:00
vfs_extattr.c	Replace AUDIT_ARG() with variable argument macros with a set more more	2009-06-27 13:58:44 +00:00
vfs_hash.c
vfs_init.c	Expand the scope of the sysctllock sx lock to protect the sysctl tree itself.	2009-02-06 14:51:32 +00:00
vfs_lookup.c	When rename("a", "b/.") is performed, target namei() call returns	2009-11-10 11:50:37 +00:00
vfs_mount.c	(S)LIST_HEAD_INITIALIZER takes a (S)LIST_HEAD as an argument.	2009-12-28 22:56:30 +00:00
vfs_subr.c	Add a knob to allow reclaim of the directory vnodes that are source of	2009-12-28 15:35:39 +00:00
vfs_syscalls.c	Don't add VAPPEND if the file is not being opened for writing. Note that this	2009-12-08 20:47:10 +00:00
vfs_vnops.c	Don't add VAPPEND if the file is not being opened for writing. Note that this	2009-12-08 20:47:10 +00:00
vnode_if.src	Add explicit struct ucred * argument for VOP_VPTOCNP, to be used by	2009-06-21 19:21:01 +00:00