Matthew Dillon 389d2b6e21 Fix a refcount race with the vmspace structure. In order to prevent ...

resource starvation we clean-up as much of the vmspace structure as we
can when the last process using it exits.  The rest of the structure
is cleaned up when it is reaped.  But since exit1() decrements the ref
count it is possible for a double-free to occur if someone else, such as
the process swapout code, references and then dereferences the structure.
Additionally, the final cleanup of the structure should not occur until
the last process referencing it is reaped.

This commit solves the problem by introducing a secondary reference count,
calling 'vm_exitingcnt'.  The normal reference count is decremented on exit
and vm_exitingcnt is incremented.  vm_exitingcnt is decremented when the
process is reaped.  When both vm_exitingcnt and vm_refcnt are 0, the
structure is freed for real.

MFC after:	3 weeks

2002-12-15 18:50:04 +00:00

..

bus_if.m

Add two interfaces to allow for busses to report the pnpinfo for

2002-10-07 05:06:38 +00:00

clock_if.m

Add a generic implementation of inittodr() and resettodr(), as well as

2002-04-04 23:39:10 +00:00

device_if.m

…

genassym.sh

Allow one to specify the AWK used in the environment(commandline).

2002-02-11 03:54:30 +00:00

imgact_aout.c

Use the fields in the sysentvec and in the vm map header in place of the

2002-09-21 22:07:17 +00:00

imgact_elf32.c

Infrastructure tweaks to allow having both an Elf32 and an Elf64 executable

2002-07-20 02:56:12 +00:00

imgact_elf64.c

Infrastructure tweaks to allow having both an Elf32 and an Elf64 executable

2002-07-20 02:56:12 +00:00

imgact_elf.c

Assign value of NULL to imgp->execlabel when imgp is initialized

2002-11-08 20:49:50 +00:00

imgact_elfN.c

Infrastructure tweaks to allow having both an Elf32 and an Elf64 executable

2002-07-20 02:56:12 +00:00

imgact_gzip.c

Use the fields in the sysentvec and in the vm map header in place of the

2002-09-21 22:07:17 +00:00

imgact_shell.c

Remove reference to struct execve_args from struct imgact, which

2002-11-05 01:59:56 +00:00

inflate.c

Modernize my email address.

2002-03-25 13:52:45 +00:00

init_main.c

Fix typo in comment. It's SYSINIT, not SYSINT.

2002-11-30 22:15:30 +00:00

init_sysent.c

Regenerate after adding system calls.

2002-11-16 06:36:56 +00:00

kern_acct.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

kern_acl.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

kern_alq.c

- Export the alq daemon thread pointer.

2002-09-26 07:38:56 +00:00

kern_clock.c

1. Support versioning and wall clock in kse mailbox,

2002-11-18 01:59:31 +00:00

kern_condvar.c

More work on the interaction between suspending and sleeping threads.

2002-10-25 07:11:12 +00:00

kern_conf.c

Don't allow dev_stdclone(9) to accept minors larger than the system is

2002-10-05 17:10:28 +00:00

kern_context.c

Add getcontext, setcontext, and swapcontext as system calls.

2002-11-16 06:35:53 +00:00

kern_descrip.c

Drop filedesc lock and acquire Giant around calls to malloc() and free().

2002-12-13 09:59:40 +00:00

kern_environment.c

remove syscallarg().

2002-12-14 02:07:32 +00:00

kern_event.c

Minor comment typo fix.

2002-10-29 20:51:44 +00:00

kern_exec.c

remove syscallarg().

2002-12-14 02:07:32 +00:00

kern_exit.c

Fix a refcount race with the vmspace structure. In order to prevent

2002-12-15 18:50:04 +00:00

kern_fork.c

Unbreak the KSE code. Keep track of zobie threads using the Per-CPU storage

2002-12-10 02:33:45 +00:00

kern_idle.c

- Create a new scheduler api that is defined in sys/sched.h

2002-10-12 05:32:24 +00:00

kern_intr.c

Instead of (sizeof(source_buffer) - 1) bytes, copy at most

2002-10-17 21:02:02 +00:00

kern_jail.c

remove syscallarg().

2002-12-14 02:07:32 +00:00

kern_kse.c

Unbreak the KSE code. Keep track of zobie threads using the Per-CPU storage

2002-12-10 02:33:45 +00:00

kern_kthread.c

Some kernel threads try to do significant work, and the default KSTACK_PAGES

2002-10-02 07:44:29 +00:00

kern_ktr.c

- Export the alq daemon thread pointer.

2002-09-26 07:38:56 +00:00

kern_ktrace.c

Some kernel threads try to do significant work, and the default KSTACK_PAGES

2002-10-02 07:44:29 +00:00

kern_linker.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

kern_lock.c

Remove a race condition / deadlock from snapshots. When

2002-11-30 19:00:51 +00:00

kern_lockf.c

- Fix a bunch of casts to long which were truncating off_t's.

2002-11-07 21:56:05 +00:00

kern_mac.c

SCARGS removal take II.

2002-12-14 01:56:26 +00:00

kern_malloc.c

Introduce malloc_last_fail() which returns the number of seconds since

2002-11-01 18:58:12 +00:00

kern_mib.c

Move the definitions of the hw.physmem, hw.usermem and hw.availpages

2002-11-07 23:57:17 +00:00

kern_module.c

SCARGS removal take II.

2002-12-14 01:56:26 +00:00

kern_mtxpool.c

Change callers of mtx_init() to pass in an appropriate lock type name. In

2002-04-04 21:03:38 +00:00

kern_mutex.c

Disable the kernacc() check in mtx_validate() until such time that kernacc

2002-10-25 08:40:20 +00:00

kern_ntptime.c

Remove an unused variable.

2002-10-11 10:36:22 +00:00

kern_physio.c

Change iov_base's type from char *' to the standard void *'. All

2002-10-11 14:58:34 +00:00

kern_poll.c

Increase size of ifnet.if_flags from 16 bits (short) to 32 bits (int). To avoid

2002-08-18 07:05:00 +00:00

kern_proc.c

- Add the new sched_pctcpu() function to the sched_* api.

2002-11-21 09:30:55 +00:00

kern_prot.c

Include file cleanup; mac.h and malloc.h at one point had ordering

2002-08-01 17:47:56 +00:00

kern_resource.c

- Create a new scheduler api that is defined in sys/sched.h

2002-10-12 05:32:24 +00:00

kern_sema.c

Change callers of mtx_init() to pass in an appropriate lock type name. In

2002-04-04 21:03:38 +00:00

kern_shutdown.c

During shutdown explain what the numbers following the 'syncing

2002-11-18 02:41:03 +00:00

kern_sig.c

Split 4.x and 5.x signal handling so that we can keep 4.x signal

2002-10-25 19:10:58 +00:00

kern_subr.c

Use pmap_remove_all() instead of pmap_remove() before freeing the page

2002-11-28 08:44:26 +00:00

kern_switch.c

Did you ever notice how stupid bugs show up much clearer

2002-10-14 20:43:02 +00:00

kern_sx.c

Set the lock type equal to the lock name for now as all of the current

2002-04-04 20:49:35 +00:00

kern_synch.c

Unbreak the KSE code. Keep track of zobie threads using the Per-CPU storage

2002-12-10 02:33:45 +00:00

kern_syscalls.c

- Lock down the ``module'' structure by adding an SX lock that is used by

2002-03-18 07:45:30 +00:00

kern_sysctl.c

Implement mac_check_system_sysctl(), a MAC Framework entry point to

2002-10-27 07:12:34 +00:00

kern_tc.c

Introduce a "time_uptime" global variable which holds the time since boot

2002-11-01 18:52:20 +00:00

kern_thread.c

Unbreak the KSE code. Keep track of zobie threads using the Per-CPU storage

2002-12-10 02:33:45 +00:00

kern_time.c

SCARGS removal take II.

2002-12-14 01:56:26 +00:00

kern_timeout.c

Fix a format buglet.

2002-09-05 11:42:03 +00:00

kern_uuid.c

Include <sys/systm.h> for the declarations of many things instead of

2002-08-22 12:47:22 +00:00

kern_xxx.c

more caddr_t removal.

2002-06-29 02:00:02 +00:00

ksched.c

headers should not really include "opt_foo.h" (in this case opt_posix.h).

2002-11-15 22:55:06 +00:00

link_elf_obj.c

Merge kld access control checks from the MAC tree: these access control

2002-11-19 22:12:42 +00:00

link_elf.c

Merge kld access control checks from the MAC tree: these access control

2002-11-19 22:12:42 +00:00

linker_if.m

…

Make.tags.inc

Don't hardcode /sys when making tags, instead use ${.CURDIR}/.. this

2002-02-27 10:07:15 +00:00

Makefile

…

makesyscalls.sh

The syscall names are string constants, so make them consts.

2002-10-29 15:47:06 +00:00

md4c.c

…

md5c.c

We have memset() and memcpy() in the kernel now, so we don't need to

2002-10-20 22:33:42 +00:00

p1003_1b.c

headers should not really include "opt_foo.h" (in this case opt_posix.h).

2002-11-15 22:55:06 +00:00

posix4_mib.c

Rework the sysconf(3) interaction with aio:

2002-11-17 04:15:34 +00:00

sched_4bsd.c

- Add the new sched_pctcpu() function to the sched_* api.

2002-11-21 09:30:55 +00:00

subr_acl_posix1e.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

subr_autoconf.c

Remove __P.

2002-03-19 21:25:46 +00:00

subr_blist.c

Now that daddr_t has grown up, use %lld to printf it and cast it to long

2002-05-18 23:46:04 +00:00

subr_bus.c

devd kernel improvements:

2002-11-30 00:49:43 +00:00

subr_clist.c

Remove __P.

2002-03-19 21:25:46 +00:00

subr_clock.c

Use the CPU_* OID constants instead of OID_AUTO for the clock-related

2002-08-07 19:43:54 +00:00

subr_devstat.c

Use strlcpy() instead of strncpy() to copy NUL terminated strings

2002-10-17 20:03:38 +00:00

subr_disk.c

This checkin reimplements the io-request priority hack in a way

2002-10-22 00:59:49 +00:00

subr_disklabel.c

(This commit touches about 15 disk device drivers in a very consistent

2002-09-20 19:36:05 +00:00

subr_diskmbr.c

Split MBR and PC98 on-disk sliceformats out from disklabel.h, step 1:

2002-10-01 07:24:55 +00:00

subr_diskslice.c

Use strlcpy() instead of strncpy() to copy NUL terminated strings

2002-10-17 20:03:38 +00:00

subr_eventhandler.c

Wrap a line longer than 80 characters.

2002-07-19 17:44:44 +00:00

subr_hints.c

Cosmetic tweaks. Try and keep the style more consistent, catch some stray

2002-05-01 02:51:50 +00:00

subr_kobj.c

Convert hit and miss counters to unsigned values. Surely negative values

2002-06-10 22:40:26 +00:00

subr_log.c

Make the msg_size, msg_bufx and msg_bufr memebers of struct msgbuf

2002-11-14 16:11:12 +00:00

subr_mbuf.c

o Initialise each mbuf's m_len to 0 in m_getm(); mb_put_mem() depends

2002-11-27 04:26:00 +00:00

subr_mchain.c

Don't dereference the 'x' pointer if it is NULL, instead skip the

2002-10-22 18:44:59 +00:00

subr_module.c

…

subr_param.c

Change hw.physmem and hw.usermem to unsigned long like they used to be

2002-08-30 04:04:37 +00:00

subr_pcpu.c

…

subr_power.c

Use ISO 9X variadic macro format; arguments are not optional, just

2002-07-15 17:17:56 +00:00

subr_prf.c

Make the msg_size, msg_bufx and msg_bufr memebers of struct msgbuf

2002-11-14 16:11:12 +00:00

subr_prof.c

Don't #error if we are lint.

2002-10-01 13:15:11 +00:00

subr_rman.c

Make the rman_{get,set}_* macros into real functions. The macros

2002-11-27 03:55:22 +00:00

subr_rtc.c

Use the CPU_* OID constants instead of OID_AUTO for the clock-related

2002-08-07 19:43:54 +00:00

subr_sbuf.c

Add the new function "sbuf_done()" which returns non-zero if the sbuf is

2002-10-04 09:58:17 +00:00

subr_scanf.c

Fix mis-indentation.

2002-10-02 09:09:25 +00:00

subr_smp.c

Completely redo thread states.

2002-09-11 08:13:56 +00:00

subr_taskqueue.c

If we fail to write to a vnode during a ktrace write, then we drop all

2002-08-01 13:35:38 +00:00

subr_trap.c

To reduce per-return overhead of userret(), call into

2002-11-08 19:00:17 +00:00

subr_turnstile.c

Disable the kernacc() check in mtx_validate() until such time that kernacc

2002-10-25 08:40:20 +00:00

subr_witness.c

Correct an assertion in the code to traverse the list of locks to find an

2002-11-11 16:36:20 +00:00

subr_xxx.c

Here follows the new kernel dumping infrastructure.

2002-03-31 22:37:00 +00:00

sys_generic.c

SCARGS removal take II.

2002-12-14 01:56:26 +00:00

sys_pipe.c

Remove a KASSERT I added in 1.73 to catch uninitialized pipes.

2002-10-14 21:15:04 +00:00

sys_process.c

Add a missing PROC_UNLOCK in ptrace() for the PT_IO case.

2002-10-16 16:28:33 +00:00

sys_socket.c

Update the st_size reported via stat(2) to accurately reflect the amount

2002-11-01 21:31:13 +00:00

syscalls.c

Regenerate after adding system calls.

2002-11-16 06:36:56 +00:00

syscalls.master

Add getcontext, setcontext, and swapcontext as system calls.

2002-11-16 06:35:53 +00:00

sysv_ipc.c

Change the suser() API to take advantage of td_ucred as well as do a

2002-04-01 21:31:13 +00:00

sysv_msg.c

o Clear a high bit of ipc_perm.seq so msgget(3) never returns a

2002-12-15 09:41:46 +00:00

sysv_sem.c

Don't leak memory in semop(2). (Fix a bug I introduced in rev 1.55.)

2002-10-19 02:07:35 +00:00

sysv_shm.c

return foo -> return (foo)

2002-08-15 02:10:12 +00:00

tty_compat.c

Fixed some style bugs in the removal of __P(()). The main ones were

2002-03-24 05:09:11 +00:00

tty_conf.c

…

tty_cons.c

Use strlcpy() instead of strncpy() to copy NUL terminated strings

2002-10-17 20:03:38 +00:00

tty_pty.c

- Lock proctree_lock instead of pgrpsess_lock.

2002-04-16 17:09:22 +00:00

tty_subr.c

Remove __P.

2002-03-19 21:25:46 +00:00

tty_tty.c

Pass active_cred and file_cred into the MAC framework explicitly

2002-08-19 19:04:53 +00:00

tty.c

In an SMP environment post-Giant it is no longer safe to blindly

2002-10-03 02:13:00 +00:00

uipc_accf.c

…

uipc_cow.c

Change iov_base's type from char *' to the standard void *'. All

2002-10-11 14:58:34 +00:00

uipc_domain.c

Back out my lats commit of locking down a socket, it conflicts with hsu's work.

2002-05-31 11:52:35 +00:00

uipc_jumbo.c

o Lock page queue accesses by vm_page_free().

2002-07-21 19:06:46 +00:00

uipc_mbuf2.c

correct function names in KASSERT's for 2 m_tag routines

2002-11-26 17:59:16 +00:00

uipc_mbuf.c

Replace aux mbufs with packet tags:

2002-10-16 01:54:46 +00:00

uipc_proto.c

…

uipc_sem.c

Be consistent about funtions being static.

2002-10-16 10:42:13 +00:00

uipc_sockbuf.c

Spotted a couple of places where the socket buffer's counters were being

2002-11-05 18:52:25 +00:00

uipc_socket2.c

Spotted a couple of places where the socket buffer's counters were being

2002-11-05 18:52:25 +00:00

uipc_socket.c

Small SO_RCVTIMEO and SO_SNDTIMEO values are mistakenly taken to be zero.

2002-11-27 13:34:04 +00:00

uipc_syscalls.c

Integrate mac_check_socket_send() and mac_check_socket_receive()

2002-10-06 14:39:15 +00:00

uipc_usrreq.c

Trim extraneous #else and #endif MAC comments per style(9).

2002-10-28 21:17:53 +00:00

vfs_acl.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

vfs_aio.c

Rework the sysconf(3) interaction with aio:

2002-11-17 04:15:34 +00:00

vfs_bio.c

The buffer daemon cannot skip over buffers owned by locked inodes as

2002-12-14 01:35:30 +00:00

vfs_cache.c

Split up __getcwd so that kernel callers of the internal version

2002-09-02 22:40:30 +00:00

vfs_cluster.c

- Use %j to print intmax_t values.

2002-11-07 22:41:08 +00:00

vfs_default.c

Don't try to be cute and save a call/return by implementing a degenerate

2002-10-24 17:55:49 +00:00

vfs_export.c

Partial backout of 1.318, remove error handling added because it may be

2002-06-30 05:23:58 +00:00

vfs_extattr.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

vfs_init.c

We don't need to check the return value of malloc() against

2002-06-22 21:44:11 +00:00

vfs_lookup.c

Add a new 'NOMACCHECK' flag to namei() NDINIT flags, which permits the

2002-10-19 21:25:51 +00:00

vfs_mount.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

vfs_subr.c

Perform vm_object_lock() and vm_object_unlock() around

2002-12-15 05:41:56 +00:00

vfs_syscalls.c

unwrap lines made short enough by SCARGS removal

2002-12-14 08:18:06 +00:00

vfs_vnops.c

Within ufs, the ffs_sync and ffs_fsync functions did not always

2002-10-25 00:20:37 +00:00

vnode_if.src

- We don't need any automated lock checking for vop_islocked.

2002-09-26 00:31:16 +00:00