Konstantin Belousov 8638fe7bea Thread waiting for the vfork(2)-ed child to exec or exit, must allow ...

for the suspension.

Currently, the loop performs uninterruptible cv_wait(9) call, which
prevents suspension until child allows further execution of parent.
If child is stopped, suspension or single-threading is delayed
indefinitely.

Create a helper thread_suspend_check_needed() to identify the need for
a call to thread_suspend_check().  It is required since call to the
thread_suspend_check() cannot be safely done while owning the child
(p2) process lock.  Only when suspension is needed, drop p2 lock and
call thread_suspend_check().  Perform wait for cv with timeout, in
case suspend is requested after wait started; I do not see a better
way to interrupt the wait.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

2014-12-08 16:18:05 +00:00

..

bus_if.m

Add a bus method to fetch the VM domain for the given device/bus.

2014-10-09 05:33:25 +00:00

capabilities.conf

Allow sigwait(2) in capabilities mode.

2014-01-28 01:49:49 +00:00

clock_if.m

…

cpufreq_if.m

…

device_if.m

…

genassym.sh

…

imgact_aout.c

…

imgact_binmisc.c

Allow multiple image activators to run on the same execution by changing

2014-09-04 21:31:25 +00:00

imgact_elf32.c

…

imgact_elf64.c

…

imgact_elf.c

The size value should be asserted when it is known.

2014-11-22 18:15:02 +00:00

imgact_gzip.c

Add a mmap flag (MAP_32BIT) on 64-bit platforms to request that a mapping use

2013-09-09 18:11:59 +00:00

imgact_shell.c

Allow multiple image activators to run on the same execution by changing

2014-09-04 21:31:25 +00:00

inflate.c

…

init_main.c

The process spin lock currently has the following distinct uses:

2014-11-26 14:10:00 +00:00

init_sysent.c

Regen for r274462.

2014-11-13 05:28:06 +00:00

kern_acct.c

acct: create a special plimit object and set it for exiting processes

2013-06-30 19:08:06 +00:00

kern_alq.c

Prevent alq from panic when the invalid alq_file path specified.

2014-04-05 16:54:47 +00:00

kern_clock.c

The process spin lock currently has the following distinct uses:

2014-11-26 14:10:00 +00:00

kern_clocksource.c

remove opensolaris cyclic code, replace with high-precision callouts

2014-12-07 11:21:41 +00:00

kern_condvar.c

Fix lc_lock/lc_unlock() support for rmlocks held in shared mode. With

2013-09-20 23:06:21 +00:00

kern_conf.c

Remove global device lock acquisition from dev_relthread(), replacing it

2013-10-22 10:40:26 +00:00

kern_cons.c

Stop using early_putc immediately after configuring console with cninit()

2014-11-19 14:23:29 +00:00

kern_context.c

…

kern_cpu.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

kern_cpuset.c

Fix multiple incorrect SYSCTL arguments in the kernel:

2014-10-21 07:31:21 +00:00

kern_ctf.c

…

kern_descrip.c

Properly initialize the capability rights for vnodes exported to procstat

2014-11-24 18:34:11 +00:00

kern_dtrace.c

Commit the rest of the changes that were intended to be part of r266826.

2014-05-29 01:42:22 +00:00

kern_environment.c

Test if 'env' is NULL before doing memset() and strlen(),

2014-10-23 18:23:50 +00:00

kern_et.c

Fix build breakage. Apparently all ARM configs build kern_et.c, but only a

2014-04-02 17:34:17 +00:00

kern_event.c

prevent doing filter ops locking for staticly compiled filter ops...

2014-11-16 01:18:41 +00:00

kern_exec.c

filedesc: fix missed comments about fdsetugidsafety

2014-10-31 09:56:00 +00:00

kern_exit.c

When process is exiting, check for suspension regardless of

2014-12-08 16:02:02 +00:00

kern_fail.c

…

kern_ffclock.c

The SYSCTL data pointers can come from userspace and must not be

2014-10-28 12:00:39 +00:00

kern_fork.c

filedesc: fixup fdinit to lock fdp and preapare files conditinally

2014-11-13 21:15:09 +00:00

kern_gzio.c

…

kern_hhook.c

Move hhook's per-vnet initialisation to an earlier SYSINIT SI_SUB stage to

2013-06-15 10:08:34 +00:00

kern_idle.c

…

kern_intr.c

This is the much-discussed major upgrade to the random(4) device, known to you all as /dev/random.

2014-10-30 21:21:53 +00:00

kern_jail.c

Avoid unlocking unlocked mutex in RCTL jail code. Specific test case

2014-09-09 16:05:33 +00:00

kern_khelp.c

Cleanup and simplification in khelp_{register|deregister}_helper(). No

2013-06-15 06:45:17 +00:00

kern_kthread.c

Do not use potentially stale thread in kthread_add()

2013-08-17 17:02:43 +00:00

kern_ktr.c

Drop KTR records when we're in the debugger so that the debugger isn't

2014-07-02 22:13:07 +00:00

kern_ktrace.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

kern_linker.c

Const poison in a few places to ensure we don't modify things

2014-12-03 22:14:13 +00:00

kern_lock.c

Do not try to dereference thread pointer when the value is not a pointer.

2014-11-13 17:44:35 +00:00

kern_lockf.c

Correct the problem reported by test16 from

2014-07-08 08:10:15 +00:00

kern_lockstat.c

- For kernel compiled only with KDTRACE_HOOKS and not any lock debugging

2013-11-25 07:38:45 +00:00

kern_loginclass.c

Simplify sys_getloginclass.

2014-10-28 04:59:33 +00:00

kern_malloc.c

svn revisions r269964 and r269963 seemed to have impaired small memory

2014-09-22 05:07:22 +00:00

kern_mbuf.c

Test for absence of M_NOFREE before attempting to purge the mbuf's tags.

2014-09-30 23:16:26 +00:00

kern_mib.c

Fix multiple incorrect SYSCTL arguments in the kernel:

2014-10-21 07:31:21 +00:00

kern_module.c

…

kern_mtxpool.c

Garbage collect mtxpool_lockbuilder, the mutex pool historically used

2014-05-02 07:57:40 +00:00

kern_mutex.c

Disable recursion for the process spinlock.

2014-12-01 17:36:10 +00:00

kern_ntptime.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

kern_osd.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

kern_physio.c

Fix some issues in change 254760 pointed out by Bruce Evans:

2013-08-29 16:41:40 +00:00

kern_pmc.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

kern_poll.c

- Remove empty wrappers ether_poll_[de]register_drv(). [1]

2014-09-28 14:05:18 +00:00

kern_priv.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

kern_proc.c

Disable recursion for the process spinlock.

2014-12-01 17:36:10 +00:00

kern_prot.c

Extend struct ucred with group table.

2014-11-05 02:08:37 +00:00

kern_racct.c

The process spin lock currently has the following distinct uses:

2014-11-26 14:10:00 +00:00

kern_rangelock.c

Change the queue of locks in kern_rangelock.c from holding lock requests in

2013-08-15 20:19:17 +00:00

kern_rctl.c

…

kern_resource.c

The process spin lock currently has the following distinct uses:

2014-11-26 14:10:00 +00:00

kern_rmlock.c

- For kernel compiled only with KDTRACE_HOOKS and not any lock debugging

2013-11-25 07:38:45 +00:00

kern_rwlock.c

Add a new thread state "spinning" to schedgraph and add tracepoints at the

2014-11-04 16:35:56 +00:00

kern_sdt.c

Print a backtrace if the SDT(9) stub gets called so that there's at least

2014-02-22 01:41:45 +00:00

kern_sema.c

…

kern_sharedpage.c

Remove the deprecated VM_ALLOC_RETRY flag for the vm_page_grab(9).

2013-08-22 07:39:53 +00:00

kern_shutdown.c

Add missing privilege check when setting the dump device. Before that change it

2014-11-11 04:48:09 +00:00

kern_sig.c

Assert the state of the process lock and sigact mutex in

2014-11-28 10:20:00 +00:00

kern_switch.c

…

kern_sx.c

Add a new thread state "spinning" to schedgraph and add tracepoints at the

2014-11-04 16:35:56 +00:00

kern_synch.c

Fix multiple incorrect SYSCTL arguments in the kernel:

2014-10-21 07:31:21 +00:00

kern_syscalls.c

Fix up module unload for syscall_module_handler consumers.

2014-11-01 22:36:40 +00:00

kern_sysctl.c

Now that sysctl_root is only called with sysctl lock in shared mode, update

2014-10-26 01:47:55 +00:00

kern_tc.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

kern_thr.c

Clean up confusing comment. Move it to the place of code which is

2014-11-03 11:29:08 +00:00

kern_thread.c

Thread waiting for the vfork(2)-ed child to exec or exit, must allow

2014-12-08 16:18:05 +00:00

kern_time.c

The process spin lock currently has the following distinct uses:

2014-11-26 14:10:00 +00:00

kern_timeout.c

Add schedgraph traces for callout handlers. Specifically, a callwheel logs

2014-10-08 16:22:59 +00:00

kern_umtx.c

Fix assertion, &uc->uc_busy is never zero, the intent is to test the

2014-11-13 18:51:09 +00:00

kern_uuid.c

Fix a bug in be_uuid_dec(); it called le16dec() instead of be16dec(),

2014-02-13 22:24:36 +00:00

kern_xxx.c

…

ksched.c

…

link_elf_obj.c

Fully support constructors for the purpose of code coverage analysis.

2014-10-20 17:04:03 +00:00

link_elf.c

Fully support constructors for the purpose of code coverage analysis.

2014-10-20 17:04:03 +00:00

linker_if.m

…

Make.tags.inc

Remove AppleTalk support.

2014-03-14 06:29:43 +00:00

Makefile

…

makesyscalls.sh

Fix syscalls that can be loaded as kernel modules - they were not given

2013-12-15 23:19:42 +00:00

md4c.c

…

md5c.c

…

p1003_1b.c

…

posix4_mib.c

…

sched_4bsd.c

Restore pre-r239157 handling of sched_yield(), when thread time slice was

2014-08-23 17:31:56 +00:00

sched_ule.c

Update the ULE scheduler + thread and kinfo structs to use int for cpuid

2014-10-18 19:36:11 +00:00

serdev_if.m

…

stack_protector.c

…

subr_acl_nfs4.c

…

subr_acl_posix1e.c

…

subr_autoconf.c

…

subr_blist.c

…

subr_bufring.c

…

subr_bus_dma.c

Add bus_dmamap_load_ma() function to load map with the array of

2013-10-27 21:39:16 +00:00

subr_bus.c

Revert device_getenv_int() for now as it duplicates resource_int_value().

2014-12-03 15:29:53 +00:00

subr_busdma_bufalloc.c

Replace kernel virtual address space allocation with vmem. This provides

2013-08-07 06:21:20 +00:00

subr_capability.c

Remove duplicated includes.

2014-06-26 13:57:44 +00:00

subr_clock.c

Fix a 2038 bug.

2014-05-01 22:28:14 +00:00

subr_counter.c

Create two public UMA_ZONE_PCPU zones: 64 bit sized and pointer sized.

2014-02-10 19:59:46 +00:00

subr_devstat.c

Fix multiple incorrect SYSCTL arguments in the kernel:

2014-10-21 07:31:21 +00:00

subr_disk.c

…

subr_dummy_vdso_tc.c

…

subr_eventhandler.c

…

subr_fattime.c

Fix a comment typo; conversion tables are for leap years, not leap seconds.

2014-04-20 13:37:22 +00:00

subr_firmware.c

…

subr_hash.c

…

subr_hints.c

Follow up to r225617. In order to maximize the re-usability of kernel code

2014-10-16 18:04:43 +00:00

subr_kdb.c

Fix multiple incorrect SYSCTL arguments in the kernel:

2014-10-21 07:31:21 +00:00

subr_kobj.c

…

subr_lock.c

Drop the 3rd clause from all 3 clause BSD licenses where I am the sole

2014-02-05 18:13:27 +00:00

subr_log.c

…

subr_mbpool.c

All mbuf external free functions never fail, so let them be void.

2014-07-11 13:58:48 +00:00

subr_mchain.c

…

subr_module.c

…

subr_msgbuf.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

subr_param.c

Rework virtual machine hypervisor detection.

2014-10-28 19:17:44 +00:00

subr_pcpu.c

Create two public UMA_ZONE_PCPU zones: 64 bit sized and pointer sized.

2014-02-10 19:59:46 +00:00

subr_pctrie.c

- Add a new general purpose path-compressed radix trie which can be used

2013-05-12 04:05:01 +00:00

subr_power.c

…

subr_prf.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

subr_prof.c

The process spin lock currently has the following distinct uses:

2014-11-26 14:10:00 +00:00

subr_rman.c

Nuke the never-used RF_TIMESHARE feature, reducing the complexity of the

2014-07-16 22:18:19 +00:00

subr_rtc.c

…

subr_sbuf.c

Unbreak the ABI by reverting r268494 until the compat shims are provided

2014-07-28 07:20:22 +00:00

subr_scanf.c

…

subr_sfbuf.c

Move KASSERT into locked region.

2014-08-11 15:06:07 +00:00

subr_sglist.c

Add sglist_append_bio(9) to append a struct bio's data to a sglist

2014-01-13 04:41:08 +00:00

subr_sleepqueue.c

sysctl subsystem uses sxlocks so avoid to setup dynamic sysctl nodes

2014-06-24 15:16:55 +00:00

subr_smp.c

Pull in r267961 and r267973 again. Fix for issues reported will follow.

2014-06-28 03:56:17 +00:00

subr_stack.c

…

subr_syscall.c

Thread waiting for the vfork(2)-ed child to exec or exit, must allow

2014-12-08 16:18:05 +00:00

subr_taskqueue.c

Remove trailing whitespace.

2014-11-30 19:32:00 +00:00

subr_terminal.c

vt(4): Adjust the cursor position after changing the window size

2014-11-01 17:05:15 +00:00

subr_trap.c

Fix two issues with /dev/mem access on amd64, both causing kernel page

2014-03-21 14:25:09 +00:00

subr_turnstile.c

dtrace sdt: remove the ugly sname parameter of SDT_PROBE_DEFINE

2013-11-26 08:46:27 +00:00

subr_uio.c

Add type qualifier volatile to the base (userspace) address argument

2014-10-31 17:43:21 +00:00

subr_unit.c

Move the definition of the struct unrhdr into a separate header file,

2013-08-30 07:37:45 +00:00

subr_vmem.c

Do not set M_BESTFIT if a strategy has already been provided. This

2014-04-16 21:39:43 +00:00

subr_witness.c

Fix a typo from r189544, which replaced unp_global_rwlock with unp_list_lock

2014-10-20 20:21:40 +00:00

sys_capability.c

Prepare fget_unlocked for reading fd table only once.

2014-07-23 19:33:49 +00:00

sys_generic.c

Style changes:

2014-11-28 09:32:07 +00:00

sys_pipe.c

Remove lock recursion for the pipe pair mutex, and disable the

2014-11-29 17:18:20 +00:00

sys_procdesc.c

Add a new fo_fill_kinfo fileops method to add type-specific information to

2014-09-22 16:20:47 +00:00

sys_process.c

Plug unnecessary PRS_NEW check in kern_procctl.

2014-10-22 04:16:09 +00:00

sys_socket.c

In preparation of merging projects/sendfile, transform bare access to

2014-11-12 09:57:15 +00:00

syscalls.c

Regen for r274462.

2014-11-13 05:28:06 +00:00

syscalls.master

Add the ppoll() system call.

2014-11-13 05:26:14 +00:00

systrace_args.c

Regen for r274462.

2014-11-13 05:28:06 +00:00

sysv_ipc.c

…

sysv_msg.c

Avoid dynamic syscall overhead for statically compiled modules.

2014-10-26 19:42:44 +00:00

sysv_sem.c

Avoid dynamic syscall overhead for statically compiled modules.

2014-10-26 19:42:44 +00:00

sysv_shm.c

Avoid dynamic syscall overhead for statically compiled modules.

2014-10-26 19:42:44 +00:00

tty_compat.c

…

tty_info.c

…

tty_inq.c

…

tty_outq.c

…

tty_pts.c

Implement FIODTYPE for master ptys.

2014-10-15 12:38:26 +00:00

tty_tty.c

…

tty_ttydisc.c

…

tty.c

Fix draining in ttydev_leave():

2014-10-09 02:30:38 +00:00

uipc_accf.c

The accept filter code is not specific to the FreeBSD IPv4 network stack,

2014-07-26 19:27:34 +00:00

uipc_debug.c

Merge from projects/sendfile:

2014-11-30 12:52:33 +00:00

uipc_domain.c

Merge from projects/sendfile: extend protocols API to support

2014-11-30 13:24:21 +00:00

uipc_mbuf2.c

…

uipc_mbuf.c

Merge from projects/sendfile: extend protocols API to support

2014-11-30 13:24:21 +00:00

uipc_mqueue.c

Avoid dynamic syscall overhead for statically compiled modules.

2014-10-26 19:42:44 +00:00

uipc_sem.c

Avoid dynamic syscall overhead for statically compiled modules.

2014-10-26 19:42:44 +00:00

uipc_shm.c

Add a new fo_fill_kinfo fileops method to add type-specific information to

2014-09-22 16:20:47 +00:00

uipc_sockbuf.c

Merge from projects/sendfile: extend protocols API to support

2014-11-30 13:24:21 +00:00

uipc_socket.c

Merge from projects/sendfile: extend protocols API to support

2014-11-30 13:24:21 +00:00

uipc_syscalls.c

Remove the no-at variants of the kern_xx() syscall helpers. E.g., we

2014-11-13 18:01:51 +00:00

uipc_usrreq.c

Merge from projects/sendfile:

2014-11-30 13:40:58 +00:00

vfs_acl.c

Replace some calls to fuword() by fueword() with proper error checking.

2014-10-28 15:28:20 +00:00

vfs_aio.c

Avoid dynamic syscall overhead for statically compiled modules.

2014-10-26 19:42:44 +00:00

vfs_bio.c

Revert somewhat hackish geom_disk optimization, committed as part of r256880,

2014-10-25 15:16:19 +00:00

vfs_cache.c

Fix multiple incorrect SYSCTL arguments in the kernel:

2014-10-21 07:31:21 +00:00

vfs_cluster.c

When allocating a pbuf for the cluster write, do not sleep waiting

2013-08-27 01:31:12 +00:00

vfs_default.c

Merge from projects/sendfile:

2014-11-23 12:01:52 +00:00

vfs_export.c

After the changes in r274118 make NOIP kernels compile by hiding an

2014-11-06 12:19:39 +00:00

vfs_extattr.c

Update kernel inclusions of capability.h to use capsicum.h instead; some

2014-03-16 10:55:57 +00:00

vfs_hash.c

…

vfs_init.c

Rename sysctl_lock and _unlock to sysctl_xlock and _xunlock.

2014-10-21 19:02:26 +00:00

vfs_lookup.c

Fix two issues with lockmgr(9) LK_CAN_SHARE() test, which determines

2014-11-02 13:10:31 +00:00

vfs_mount.c

Bring in the new automounter, similar to what's provided in most other

2014-08-17 09:44:42 +00:00

vfs_mountroot.c

Remove the no-at variants of the kern_xx() syscall helpers. E.g., we

2014-11-13 18:01:51 +00:00

vfs_subr.c

Don't take devmtx unnecessarily in vn_isdisk.

2014-10-15 05:17:36 +00:00

vfs_syscalls.c

Correct a typo to fix chown(2). It was broken since r274476.

2014-11-13 23:51:13 +00:00

vfs_vnops.c

In vfs_write_suspend_umnt(), if suspension cannot be established, do

2014-11-14 11:31:10 +00:00

vnode_if.src

Merge from projects/sendfile:

2014-11-23 12:01:52 +00:00