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8d768e7676
freebsd-dev/sys/kern
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John Baldwin 8d768e7676 Rework witness_lock() to make it slightly more useful and flexible. 
- witness_lock() is split into two pieces: witness_checkorder() and
  witness_lock().  Witness_checkorder() determines if acquiring a specified
  lock at the time it is called would result in a lock order.  It
  optionally adds a new lock order relationship as well.  witness_lock()
  updates witness's data structures to assume that a lock has been acquired
  by stick a new lock instance in the appropriate lock instance list.
- The mutex and sx lock functions now call checkorder() prior to trying to
  acquire a lock and continue to call witness_lock() after the acquire is
  completed.  This will let witness catch a deadlock before it happens
  rather than trying to do so after the threads have deadlocked (i.e. never
  actually report it).
- A new function witness_defineorder() has been added that adds a lock
  order between two locks at runtime without having to acquire the locks.
  If the lock order cannot be added it will return an error.  This function
  is available to programmers via the WITNESS_DEFINEORDER() macro which
  accepts either two mutexes or two sx locks as its arguments.
- A few simple wrapper macros were added to allow developers to call
  witness_checkorder() anywhere as a way of enforcing locking assertions
  in code that might acquire a certain lock in some situations.  The
  macros are: witness_check_{mutex,shared_sx,exclusive_sx} and take an
  appropriate lock as the sole argument.
- The code to remove a lock instance from a lock list in witness_unlock()
  was unnested by using a goto to vastly improve the readability of this
  function.
2004-01-28 20:39:57 +00:00
..
bus_if.m Introduce BUS_CONFIG_INTR(). The method allows devices to tell parents 2003-09-10 21:37:10 +00:00
clock_if.m
device_if.m
genassym.sh
imgact_aout.c Add sysentvec->sv_fixlimits() hook so that we can catch cases on 64 bit 2003-09-25 01:10:26 +00:00
imgact_elf32.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf64.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf.c Add an additional field to the elf brandinfo structure to support 2003-12-23 02:42:39 +00:00
imgact_gzip.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_shell.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
inflate.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
init_main.c KASSERT() that initproc->p_pid is 1. Very bad things happen if init's 2004-01-16 20:29:23 +00:00
init_sysent.c Regen - this should be essentially a NOP, except for rcsid changes. 2003-12-23 03:52:14 +00:00
kern_acct.c Add fdidx argument to vn_open() and vn_open_cred() and pass -1 throughout. 2003-07-27 17:04:56 +00:00
kern_acl.c Move more ACL logic from the UFS code (ufs_acl.c) to the central POSIX.1e 2003-08-04 02:13:05 +00:00
kern_alq.c Allow MAC policies to block/revoke kern_alq write access to a file. 2003-10-25 16:10:41 +00:00
kern_clock.c Catch a few places where NULL (pointer) was used where 0 (integer) was 2003-12-23 02:36:43 +00:00
kern_condvar.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
kern_conf.c Retire revoke_and_destroy_dev() with extreme prejudice. 2003-09-28 20:50:36 +00:00
kern_context.c Change the clear_ret argument of get_mcontext() to be a flags argument. 2003-11-09 20:31:04 +00:00
kern_descrip.c Restore correct semantics for F_DUPFD fcntl. This should fix the errors 2004-01-17 00:59:04 +00:00
kern_environment.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_event.c Don't TAILQ_INIT kq_head twice, once is enough. 2003-12-25 23:42:36 +00:00
kern_exec.c Fixed some style bugs (mainly, try to always use explicit comparisons with 2003-12-28 04:37:59 +00:00
kern_exit.c Reduce gratuitous includes: don't include jail.h if it's not needed. 2004-01-21 17:10:47 +00:00
kern_fork.c When aborting fork() due to a failure, if using MAC, make sure to clean 2004-01-25 18:42:18 +00:00
kern_idle.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
kern_intr.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
kern_jail.c Defer the vrele() on a jail's root vnode reference from prison_free() 2004-01-23 20:44:26 +00:00
kern_kse.c Use mtx_assert() rather than using a home-rolled version. 2004-01-28 20:26:39 +00:00
kern_kthread.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_ktr.c Update the license on this file to be a bit more sane. 2003-09-10 01:09:32 +00:00
kern_ktrace.c Reduce gratuitous includes: don't include jail.h if it's not needed. 2004-01-21 17:10:47 +00:00
kern_linker.c Avoid NULL pointer dereferencing in modlist_lookup2(). 2003-09-23 14:42:38 +00:00
kern_lock.c Add pid to the info printed in lockmgr_printinfo. This makes VFS 2004-01-06 04:34:13 +00:00
kern_lockf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_mac.c Implement sockets support for __mac_get_fd() and __mac_set_fd() 2003-11-16 23:31:45 +00:00
kern_malloc.c Rename the kern.vm.kmem.size tunable to the more logical vm.kmem_size. To 2004-01-27 15:59:38 +00:00
kern_mib.c Change all SYSCTLS which are readonly and have a related TUNABLE 2003-10-21 18:28:36 +00:00
kern_module.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_mtxpool.c Rearrange the SYSINIT order to call lockmgr_init() earlier so that 2003-07-16 01:00:39 +00:00
kern_mutex.c Rework witness_lock() to make it slightly more useful and flexible. 2004-01-28 20:39:57 +00:00
kern_ntptime.c Deal with MOD_FREQUENCY before MOD_OFFSET because the latter is the 2004-01-24 21:48:43 +00:00
kern_physio.c Send B_PHYS out to pasture, it no longer serves any function. 2003-11-15 09:28:09 +00:00
kern_poll.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
kern_proc.c - Update the sched api. sched_{add,rem,clock,pctcpu} now all accept a td 2003-10-16 08:39:15 +00:00
kern_prot.c Don't grab Giant in crfree(), since prison_free() no longer requires it. 2004-01-23 21:07:52 +00:00
kern_resource.c - Don't set td_priority directly here, use sched_prio(). 2003-10-27 07:15:47 +00:00
kern_sema.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_shutdown.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
kern_sig.c Move the part of the comment which applies to osigsuspend where 2004-01-28 06:06:04 +00:00
kern_subr.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
kern_switch.c Although sometimes to the uninitiated, it may seem like goup, KSEGOUP 2003-12-12 21:25:56 +00:00
kern_sx.c Rework witness_lock() to make it slightly more useful and flexible. 2004-01-28 20:39:57 +00:00
kern_synch.c - Use a unique string for the sched_setup SYSINIT and rename sched_setup to 2004-01-25 07:49:45 +00:00
kern_syscalls.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
kern_sysctl.c Bring back sysctl_wire_old_buffer(). Fix a bug in sysctl_handle_opaque() 2003-10-05 13:31:33 +00:00
kern_tc.c Write 100 times for tomorrow: 2004-01-22 19:50:06 +00:00
kern_thr.c Update powerpc to use the (old thread,new thread) calling convention 2003-08-14 03:56:24 +00:00
kern_thread.c Use mtx_assert() rather than using a home-rolled version. 2004-01-28 20:26:39 +00:00
kern_time.c constify the second args to timevaladd() and timevalsub(). 2003-10-26 02:19:00 +00:00
kern_timeout.c Make the DIAGNOSTIC code which complains about long {call|time}out(9) 2003-12-07 20:03:28 +00:00
kern_umtx.c Return EINVAL if the contested bit is not set on the umtx passed to 2003-09-07 11:14:52 +00:00
kern_uuid.c Fix generation of random multicast MAC address. 2004-01-22 13:34:11 +00:00
kern_xxx.c Correct mostly harmless off-by-one error in getdomainname(). 2003-09-13 17:12:22 +00:00
ksched.c sched_setscheduler: Return EINVAL when a invalid policy is specified, 2003-09-13 18:46:24 +00:00
link_elf_obj.c Add the mlockall() and munlockall() system calls. 2003-08-11 07:14:08 +00:00
link_elf.c Add the mlockall() and munlockall() system calls. 2003-08-11 07:14:08 +00:00
linker_if.m The method link_preload_finish is not static. 2003-09-20 17:39:32 +00:00
Make.tags.inc Finish driving a stake through the heart of netns and the associated 2003-03-05 19:24:24 +00:00
Makefile Finish driving a stake through the heart of netns and the associated 2003-03-05 19:24:24 +00:00
makesyscalls.sh Remove the namespace column from the syscalls tables. We don't actually 2003-12-23 03:50:43 +00:00
md4c.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
md5c.c Revert stuff which accidentally ended up in the previous commit. 2003-07-22 10:36:36 +00:00
p1003_1b.c Use __FBSDID(). 2003-06-11 06:34:30 +00:00
posix4_mib.c Use __FBSDID(). 2003-06-11 06:34:30 +00:00
sched_4bsd.c - Correct function names listed in KASSERTs. These were copied from other 2004-01-25 08:21:46 +00:00
sched_ule.c - sched_strict has been dead for a long time now. Get rid of it. 2004-01-25 08:58:14 +00:00
subr_acl_posix1e.c Move more ACL logic from the UFS code (ufs_acl.c) to the central POSIX.1e 2003-08-04 02:13:05 +00:00
subr_autoconf.c Revert stuff which accidentally ended up in the previous commit. 2003-07-22 10:36:36 +00:00
subr_blist.c Expand inline the relevant parts of src/COPYRIGHT for Matt Dillon's 2003-08-12 23:24:05 +00:00
subr_bus.c o make debug_mpsafenet globally visible 2003-11-05 23:42:51 +00:00
subr_clist.c Revert stuff which accidentally ended up in the previous commit. 2003-07-22 10:36:36 +00:00
subr_clock.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_devstat.c The present defaults for the open and close for device drivers which 2003-09-27 12:01:01 +00:00
subr_disk.c Report bio_pblkbo instead of bio_blkno. 2003-10-18 17:27:10 +00:00
subr_eventhandler.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_hints.c Add a resource_disabled() helper function that returns true (non-zero) if 2003-07-02 16:01:38 +00:00
subr_kobj.c * Add multiple inheritance to kobj. Each class can have zero or more base 2003-10-16 09:16:28 +00:00
subr_log.c - Implement selwakeuppri() which allows raising the priority of a 2003-11-09 09:17:26 +00:00
subr_mbpool.c Pass MTX_DEF as the last argument to mtx_init() instead of 0. This 2003-12-07 21:53:41 +00:00
subr_mbuf.c Track current and peak sfbuf usage, export the values via sysctl. 2003-12-27 07:52:47 +00:00
subr_mchain.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_module.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_msgbuf.c Put the message about msgbuf cksum mismatch under bootverbose and tell 2003-09-05 11:12:00 +00:00
subr_param.c More pipe changes: 2003-08-11 05:51:51 +00:00
subr_pcpu.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_power.c Move the kernel power change printf under bootverbose since the 2004-01-02 18:24:13 +00:00
subr_prf.c Re-arrange and consolidate some random debugging stuff 2003-12-07 05:04:49 +00:00
subr_prof.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_rman.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_rtc.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_sbuf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_scanf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_smp.c - Move smp_topology to subr_smp.c so that it is defined on all architectures. 2004-01-24 19:52:48 +00:00
subr_taskqueue.c Various style fixes. 2003-12-17 21:13:04 +00:00
subr_trap.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
subr_turnstile.c - Add a flags parameter to mi_switch. The value of flags may be SW_VOL or 2004-01-25 03:54:52 +00:00
subr_witness.c Rework witness_lock() to make it slightly more useful and flexible. 2004-01-28 20:39:57 +00:00
sys_generic.c pread/pwrite: 2004-01-20 01:27:42 +00:00
sys_pipe.c New file descriptor allocation code, derived from similar code introduced 2004-01-15 10:15:04 +00:00
sys_process.c Implement preliminary support for the PT_SYSCALL command to ptrace(2). 2003-10-09 10:17:16 +00:00
sys_socket.c Initialize struct fileops with C99 sparse initialization. 2003-06-18 18:16:40 +00:00
syscalls.c Regen - this should be essentially a NOP, except for rcsid changes. 2003-12-23 03:52:14 +00:00
syscalls.master Put restrict back in, the compilation failure was my fault when I 2003-12-26 05:58:16 +00:00
sysv_ipc.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
sysv_msg.c Slight whitespace consistency improvement: 2003-11-07 04:47:14 +00:00
sysv_sem.c Reduce the overhead of semop() by using the kernel stack instead of 2003-12-19 13:07:17 +00:00
sysv_shm.c Slight whitespace consistency improvement: 2003-11-07 04:47:14 +00:00
tty_compat.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_conf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
tty_cons.c I think rwatson got the sign wrong here... 2003-10-18 12:16:17 +00:00
tty_pty.c - Implement selwakeuppri() which allows raising the priority of a 2003-11-09 09:17:26 +00:00
tty_subr.c Revert stuff which accidentally ended up in the previous commit. 2003-07-22 10:36:36 +00:00
tty_tty.c The present defaults for the open and close for device drivers which 2003-09-27 12:01:01 +00:00
tty.c Improve the expressiveness of ttyinfo (^T) when dealing with threads 2004-01-08 22:49:23 +00:00
uipc_accf.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_cow.c Handle sf_buf_alloc() returning null. This can happen if the 2004-01-17 21:16:51 +00:00
uipc_domain.c move domain list mutex initialization to earlier in the boot sequence so 2003-09-02 20:59:23 +00:00
uipc_jumbo.c Lock the vm object when removing a page. 2003-06-11 21:23:04 +00:00
uipc_mbuf2.c m_tag fixups in preparation for heavier use: 2004-01-02 17:27:39 +00:00
uipc_mbuf.c Fix another 0 / NULL mixup. 2003-12-25 01:17:27 +00:00
uipc_proto.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
uipc_sem.c Reduce gratuitous includes: don't include jail.h if it's not needed. 2004-01-21 17:10:47 +00:00
uipc_sockbuf.c Introduce a MAC label reference in 'struct inpcb', which caches 2003-11-18 00:39:07 +00:00
uipc_socket2.c Introduce a MAC label reference in 'struct inpcb', which caches 2003-11-18 00:39:07 +00:00
uipc_socket.c Since "m" is not part of the "mp" chain, need to free() it. 2004-01-18 14:02:53 +00:00
uipc_syscalls.c One more instance of magic number used in place of IO_SEQSHIFT. 2004-01-19 20:45:43 +00:00
uipc_usrreq.c Restore correct semantics for F_DUPFD fcntl. This should fix the errors 2004-01-17 00:59:04 +00:00
vfs_acl.c Move more ACL logic from the UFS code (ufs_acl.c) to the central POSIX.1e 2003-08-04 02:13:05 +00:00
vfs_aio.c Send B_PHYS out to pasture, it no longer serves any function. 2003-11-15 09:28:09 +00:00
vfs_bio.c Remove a variable that has been initialized but otherwise unused since 2003-12-20 19:46:21 +00:00
vfs_cache.c - Apply a big giant lock around the namecache. This has been sitting in 2003-10-05 07:13:50 +00:00
vfs_cluster.c Update the statfs structure with 64-bit fields to allow 2003-11-12 08:01:40 +00:00
vfs_default.c Remove mntvnode_mtx and replace it with per-mountpoint mutex. 2003-11-05 04:30:08 +00:00
vfs_export.c Guard against MLEN growing larger than a uint8_t due to MSIZE grwoing to a 2003-07-26 07:23:24 +00:00
vfs_extattr.c New file descriptor allocation code, derived from similar code introduced 2004-01-15 10:15:04 +00:00
vfs_init.c Change all SYSCTLS which are readonly and have a related TUNABLE 2003-10-21 18:28:36 +00:00
vfs_lookup.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
vfs_mount.c In dounmount(), only call checkdirs() prior to VFS_UNMOUNT() in the 2003-11-30 23:30:09 +00:00
vfs_subr.c More style fixes. 2004-01-05 23:40:46 +00:00
vfs_syscalls.c New file descriptor allocation code, derived from similar code introduced 2004-01-15 10:15:04 +00:00
vfs_vnops.c v_vxproc was a bogus name for a thread (pointer). 2003-12-28 09:12:56 +00:00
vnode_if.src Rename VOP_RMEXTATTR() to VOP_DELETEEXTATTR() for consistency with the 2003-07-28 18:53:29 +00:00