attilio 9a7f4738f4 - Fix a race in sched_switch() of sched_4bsd. ...

In the case of the thread being on a sleepqueue or a turnstile, the
  sched_lock was acquired (without the aid of the td_lock interface) and
  the td_lock was dropped. This was going to break locking rules on other
  threads willing to access to the thread (via the td_lock interface) and
  modify his flags (allowed as long as the container lock was different
  by the one used in sched_switch).
  In order to prevent this situation, while sched_lock is acquired there
  the td_lock gets blocked. [0]
- Merge the ULE's internal function thread_block_switch() into the global
  thread_lock_block() and make the former semantic as the default for
  thread_lock_block(). This means that thread_lock_block() will not
  disable interrupts when called (and consequently thread_unlock_block()
  will not re-enabled them when called). This should be done manually
  when necessary.
  Note, however, that ULE's thread_unblock_switch() is not reaped
  because it does reflect a difference in semantic due in ULE (the
  td_lock may not be necessarilly still blocked_lock when calling this).
  While asymmetric, it does describe a remarkable difference in semantic
  that is good to keep in mind.

[0] Reported by:	Kohji Okuno
			<okuno dot kohji at jp dot panasonic dot com>
Tested by:		Giovanni Trematerra
			<giovanni dot trematerra at gmail dot com>
MFC:			2 weeks

2010-01-23 15:54:21 +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

Introduce the new kernel thread called "deadlock resolver".

2010-01-09 01:46:38 +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

Free allocated sbufs before returning ENOMEM.

2010-01-08 22:58:50 +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

Merge change r198561 from projects/mips to head:

2010-01-10 22:34:18 +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

Remove extraneous semicolons, no functional changes.

2010-01-07 21:01:37 +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

Add ip4.saddrsel/ip4.nosaddrsel (and equivalent for ip6) to control

2010-01-17 12:57:11 +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

Fix typos.

2010-01-07 01:24:09 +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

Declare the kern.ngroups sysctl to be read-only, but tunable at boot for

2010-01-12 18:20:20 +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

- Fix a race in sched_switch() of sched_4bsd.

2010-01-23 15:54:21 +00:00

kern_ntptime.c

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

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

Only allocate the space we need before calling kern_getgroups instead

2010-01-15 07:18:46 +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

Add kernel support for the Statically Defined Trace provider.

2008-05-18 19:32:36 +00:00

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

Staticise sigqueue manipulation functions used only in kern_sig.c.

2010-01-23 11:43:30 +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

Make a chain be a list of queues, and make threads waiting

2010-01-10 09:31:57 +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

- Fix a race in sched_switch() of sched_4bsd.

2010-01-23 15:54:21 +00:00

sched_ule.c

- Fix a race in sched_switch() of sched_4bsd.

2010-01-23 15:54:21 +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

Now that all platforms use genclock, shuffle things around slightly

2008-04-22 19:38:30 +00:00

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

Remove extraneous semicolons, no functional changes.

2010-01-07 21:01:37 +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

Replace the static NGROUPS=NGROUPS_MAX+1=1024 with a dynamic

2010-01-12 07:49:34 +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

General consensus is that it would be even better to run this in a

2005-11-09 16:22:56 +00:00

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

Introduce the new kernel thread called "deadlock resolver".

2010-01-09 01:46:38 +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

Introduce the new kernel thread called "deadlock resolver".

2010-01-09 01:46:38 +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

For PT_TO_SCE stop that stops the ptraced process upon syscall entry,

2010-01-23 11:45:35 +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

Remove a dead initialization.

2010-01-18 18:58:03 +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

Remove the 1000 pseudo terminal limit from pts(4).

2010-01-13 21:22:23 +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

In keeping with style(9)'s recommendations on macros, use a ';'

2008-03-16 10:58:09 +00:00

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 new function vunref(9) that decrements vnode use count (and hold

2010-01-17 21:24:27 +00:00

vfs_syscalls.c

Background:

2010-01-11 20:44:05 +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