Eric Badger 82a4538f31 Defer ptracestop() signals that cannot be delivered immediately ...

When a thread is stopped in ptracestop(), the ptrace(2) user may request
a signal be delivered upon resumption of the thread. Heretofore, those signals
were discarded unless ptracestop()'s caller was issignal(). Fix this by
modifying ptracestop() to queue up signals requested by the ptrace user that
will be delivered when possible. Take special care when the signal is SIGKILL
(usually generated from a PT_KILL request); no new stop events should be
triggered after a PT_KILL.

Add a number of tests for the new functionality. Several tests were authored
by jhb.

PR:		212607
Reviewed by:	kib
Approved by:	kib (mentor)
MFC after:	2 weeks
Sponsored by:	Dell EMC
In collaboration with:	jhb
Differential Revision:	https://reviews.freebsd.org/D9260

2017-02-20 15:53:16 +00:00

..

bus_if.m

"Buses" is the preferred plural of "bus"

2017-01-15 17:54:01 +00:00

capabilities.conf

Update capabilities.conf comment

2016-09-08 14:04:04 +00:00

clock_if.m

…

cpufreq_if.m

…

device_if.m

Import the 'iflib' API library for network drivers. From the author:

2016-05-18 04:35:58 +00:00

genassym.sh

…

imgact_aout.c

Implement vsyscall hack. Prior to 2.13 glibc uses vsyscall

2016-01-09 20:18:53 +00:00

imgact_binmisc.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

imgact_elf32.c

…

imgact_elf64.c

…

imgact_elf.c

Copy the e_machine and e_flags fields from the binary into an ELF core dump.

2017-02-07 20:34:03 +00:00

imgact_gzip.c

…

imgact_shell.c

…

inflate.c

ANSIfy inflate.c

2016-10-04 17:57:30 +00:00

init_main.c

Bump struct thread alignment to 32.

2017-02-07 17:03:22 +00:00

init_sysent.c

Regenerate all the system call tables to drop "created from" lines.

2017-02-10 19:45:02 +00:00

kern_acct.c

Revert r312119 and reword the intent to fix -Wshadow issues

2017-01-15 09:25:33 +00:00

kern_alq.c

Use SI_SUB_LAST instead of SI_SUB_SMP as the "catch-all" subsystem.

2016-03-11 23:18:06 +00:00

kern_clock.c

Initialize 'ticks' earlier in boot after 'hz' is set.

2016-11-22 01:02:59 +00:00

kern_clocksource.c

Fix for race leading to endless timer interrupts related to

2017-01-20 17:40:31 +00:00

kern_condvar.c

Introduce SCHEDULER_STOPPED_TD for use when the thread pointer was already read

2017-02-17 06:45:04 +00:00

kern_conf.c

Undo r309891. Konstantin is right in that this condition normally

2016-12-12 19:11:04 +00:00

kern_cons.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

kern_context.c

…

kern_cpu.c

Add an EARLY_AP_STARTUP option to start APs earlier during boot.

2016-05-14 18:22:52 +00:00

kern_cpuset.c

Add kern_cpuset_getaffinity() and kern_cpuset_getaffinity(),

2017-02-05 13:24:54 +00:00

kern_ctf.c

Fix improper use of "its".

2016-11-08 23:59:41 +00:00

kern_descrip.c

fd: switch fget_unlocked to atomic_fcmpset

2017-02-05 01:40:27 +00:00

kern_dtrace.c

…

kern_dump.c

Add support for encrypted kernel crash dumps.

2016-12-10 16:20:39 +00:00

kern_environment.c

Create wrappers for uint64_t and int64_t for the tunables. While not

2016-04-15 03:09:55 +00:00

kern_et.c

Add labels to sysctls related to clocks.

2016-12-14 12:56:58 +00:00

kern_event.c

Add kevent EVFILT_EMPTY for notification when a client has received all data

2017-01-16 08:25:33 +00:00

kern_exec.c

Apply MADV_FREE to exec_map entries only after a lowmem event.

2017-02-15 01:50:58 +00:00

kern_exit.c

When a zombie gets reparented due to the parent exit, send SIGCHLD to

2016-12-12 11:11:50 +00:00

kern_fail.c

Fix some cosmetic issues in kern_fail.c omitted from r296927.

2016-06-09 13:17:08 +00:00

kern_ffclock.c

kernel: use our nitems() macro when it is available through param.h.

2016-04-19 23:48:27 +00:00

kern_fork.c

Defer ptracestop() signals that cannot be delivered immediately

2017-02-20 15:53:16 +00:00

kern_gzio.c

…

kern_hhook.c

Get closer to a VIMAGE network stack teardown from top to bottom rather

2016-06-21 13:48:49 +00:00

kern_idle.c

…

kern_intr.c

…

kern_jail.c

Use inet_ntoa_r() instead of inet_ntoa() throughout the kernel

2017-02-16 20:47:41 +00:00

kern_khelp.c

…

kern_kthread.c

Re-schedule signals after kthread exits, since apparently there are

2016-08-10 13:47:12 +00:00

kern_ktr.c

Fix the logic in the ddb command 'show ktr /a'. Prior to r118269 it would

2016-01-31 17:32:20 +00:00

kern_ktrace.c

ANSYfy kern_ktrace.c and remove archaic register keyword

2017-01-20 14:59:56 +00:00

kern_linker.c

kern_linker: Handle module-loading failures in preloaded .ko files

2016-10-13 02:06:23 +00:00

kern_lock.c

lockmgr: implement fast path

2017-02-12 09:49:44 +00:00

kern_lockf.c

put very expensive sanity checks of advisory locks under DIAGNOSTIC

2017-01-30 15:20:13 +00:00

kern_lockstat.c

mtx: microoptimize lockstat handling in __mtx_lock_sleep

2017-02-17 14:55:59 +00:00

kern_loginclass.c

Speed up rctl operation with large rulesets, by holding the lock

2015-11-15 12:10:51 +00:00

kern_malloc.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

kern_mbuf.c

Import the 'iflib' API library for network drivers. From the author:

2016-05-18 04:35:58 +00:00

kern_mib.c

Mark a bunch of mpsafe sysctls as such.

2016-10-19 19:42:01 +00:00

kern_module.c

…

kern_mtxpool.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

kern_mutex.c

locks: make trylock routines check for 'unowned' value

2017-02-19 16:28:46 +00:00

kern_ntptime.c

ANSIfy kern_ntptime.c

2017-01-25 20:22:32 +00:00

kern_numa.c

…

kern_osd.c

osd(9): Change array pointer to array pointer type from void*

2016-04-26 19:57:35 +00:00

kern_physio.c

Add four new RCTL resources - readbps, readiops, writebps and writeiops,

2016-04-07 04:23:25 +00:00

kern_pmc.c

hwpmc: annotate pmc_hook and pmc_intr as __read_mostly

2017-01-27 22:14:42 +00:00

kern_poll.c

…

kern_priv.c

…

kern_proc.c

Make sure the thread constructor and destructor eventhandlers are

2017-02-19 13:15:33 +00:00

kern_procctl.c

reaper: Make REAPER_KILL_SUBTREE actually work.

2016-12-14 22:49:20 +00:00

kern_prot.c

proc: perform a lockless check in sys_issetugid

2017-01-24 21:48:57 +00:00

kern_racct.c

try to fix RACCT_RSS accounting

2017-02-14 13:54:05 +00:00

kern_rangelock.c

…

kern_rctl.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

kern_resource.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

kern_rmlock.c

Bring back r313037, with fixes for mips:

2017-02-19 02:03:09 +00:00

kern_rwlock.c

locks: make trylock routines check for 'unowned' value

2017-02-19 16:28:46 +00:00

kern_sdt.c

…

kern_sema.c

…

kern_sendfile.c

Move bogus_page declaration to vm_page.h and initialization to vm_page.c.

2017-01-04 22:27:19 +00:00

kern_sharedpage.c

Split kerne timekeep ABI structure vdso_sv_tk out of the struct

2015-11-23 07:09:35 +00:00

kern_shutdown.c

Revert crap accidentally committed

2017-01-28 16:31:23 +00:00

kern_sig.c

Defer ptracestop() signals that cannot be delivered immediately

2017-02-20 15:53:16 +00:00

kern_switch.c

Add comments explaining unobvious td_critnest adjustments in

2017-01-22 19:41:42 +00:00

kern_sx.c

locks: make trylock routines check for 'unowned' value

2017-02-19 16:28:46 +00:00

kern_synch.c

Introduce SCHEDULER_STOPPED_TD for use when the thread pointer was already read

2017-02-17 06:45:04 +00:00

kern_syscalls.c

…

kern_sysctl.c

Document the existence of the {0, 6, ...} sysctl.

2016-12-15 15:45:11 +00:00

kern_tc.c

Add labels to sysctls related to clocks.

2016-12-14 12:56:58 +00:00

kern_thr.c

Defer ptracestop() signals that cannot be delivered immediately

2017-02-20 15:53:16 +00:00

kern_thread.c

Bump struct thread alignment to 32.

2017-02-07 17:03:22 +00:00

kern_time.c

Use time_t for intermediate values to avoid overflow in clock_ts_to_ct

2017-01-24 18:05:29 +00:00

kern_timeout.c

Permit timed sleeps for threads other than thread0 before timers are working.

2016-11-25 18:02:43 +00:00

kern_umtx.c

[mips] make UMTX_CHAINS configurable at compile time.

2016-11-15 01:34:38 +00:00

kern_uuid.c

…

kern_xxx.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

ksched.c

…

link_elf_obj.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

link_elf.c

kern: for pointers replace 0 with NULL.

2016-04-15 16:10:11 +00:00

linker_if.m

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

Make.tags.inc

Bring the tags and links entries for amd64 up to date.

2015-10-27 22:59:24 +00:00

Makefile

Don't create pointless backups of generated files in "make sysent".

2016-07-28 21:29:04 +00:00

makesyscalls.sh

Drop the "created from" line from files generated by makesyscalls.sh.

2017-02-10 19:25:52 +00:00

md4c.c

crypto routines: Hint minimum buffer sizes to the compiler

2016-05-26 19:29:29 +00:00

md5c.c

crypto routines: Hint minimum buffer sizes to the compiler

2016-05-26 19:29:29 +00:00

msi_if.m

Introduce MSI and MSI-X support to intrng. This adds a new msi device

2016-05-16 09:11:40 +00:00

p1003_1b.c

…

pic_if.m

INTRNG: Rework handling with resources. Partially revert r301453.

2016-08-19 10:52:39 +00:00

posix4_mib.c

posix4_mib: Don't overrun facility_initialized array

2016-04-27 00:10:32 +00:00

sched_4bsd.c

Revert r313814 and r313816

2017-02-16 21:18:31 +00:00

sched_ule.c

Revert r313814 and r313816

2017-02-16 21:18:31 +00:00

serdev_if.m

…

stack_protector.c

…

subr_acl_nfs4.c

…

subr_acl_posix1e.c

…

subr_autoconf.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_blist.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_bufring.c

…

subr_bus_dma.c

Fix a bug introduced in r291716:

2016-01-11 20:38:39 +00:00

subr_bus.c

"Buses" is the preferred plural of "bus"

2017-01-15 17:54:01 +00:00

subr_busdma_bufalloc.c

Fix printf format to allow for bus_size_t not being u_long on all platforms.

2015-10-20 03:25:17 +00:00

subr_capability.c

capsicum: plug spurious memset in __cap_rights_init

2015-12-01 02:48:42 +00:00

subr_clock.c

Use time_t for intermediate values to avoid overflow in clock_ts_to_ct

2017-01-24 18:05:29 +00:00

subr_counter.c

Zero return value when counter_rate() switches over to next second and

2016-12-13 20:11:45 +00:00

subr_devmap.c

Include machine/acle-compat.h in cdefs.h on arm if the compiler doesn't

2016-05-25 19:44:26 +00:00

subr_devstat.c

Add support for managing Shingled Magnetic Recording (SMR) drives.

2016-05-19 14:08:36 +00:00

subr_disk.c

…

subr_dummy_vdso_tc.c

…

subr_eventhandler.c

…

subr_fattime.c

…

subr_firmware.c

Fix improper use of "its".

2016-11-08 23:59:41 +00:00

subr_gtaskqueue.c

A few more style bugs lying around in here.

2017-01-26 13:48:45 +00:00

subr_hash.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_hints.c

…

subr_intr.c

Only allow the pic type to be either a PIC or MSI type. All interrupt

2017-02-06 13:08:48 +00:00

subr_kdb.c

…

subr_kobj.c

…

subr_lock.c

locks: follow up r313386

2017-02-07 16:01:07 +00:00

subr_log.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_mbpool.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

subr_mchain.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_module.c

…

subr_msgbuf.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

subr_param.c

Initialize 'ticks' earlier in boot after 'hz' is set.

2016-11-22 01:02:59 +00:00

subr_pcpu.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_pctrie.c

sys: extend use of the howmany() macro when available.

2016-04-26 15:38:17 +00:00

subr_power.c

…

subr_prf.c

Include <stdarg.h> instead of <machine/stdarg.h> when compiled as

2016-10-24 18:03:04 +00:00

subr_prof.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_rman.c

Add new bus methods for mapping resources.

2016-05-20 17:57:47 +00:00

subr_rtc.c

Make resettodr_lock accessible outside subr_rtc.c. Protect

2016-09-21 10:15:08 +00:00

subr_sbuf.c

…

subr_scanf.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

subr_sfbuf.c

subr_sfbus.c need sys/proc.h for struct thread definition.

2017-02-07 17:31:24 +00:00

subr_sglist.c

Add sglist functions for working with arrays of VM pages.

2016-05-20 23:28:43 +00:00

subr_sleepqueue.c

sleepq_catch_signals: do thread suspension before signal check

2017-02-14 17:13:23 +00:00

subr_smp.c

Handle broadcast NMIs.

2016-10-24 16:40:27 +00:00

subr_stack.c

Add support for a configurable output channel to witness(4).

2015-11-19 05:56:59 +00:00

subr_syscall.c

Defer ptracestop() signals that cannot be delivered immediately

2017-02-20 15:53:16 +00:00

subr_taskqueue.c

While draining a timeout task prevent the taskqueue_enqueue_timeout()

2016-09-29 10:38:20 +00:00

subr_terminal.c

…

subr_trap.c

The assertion re-added in r302614 was triggered when stopping signal

2016-07-18 10:53:47 +00:00

subr_turnstile.c

ddb(4): Add sleepchains to "show allchains"

2016-10-22 18:02:20 +00:00

subr_uio.c

Switch copyout_map() to use vm_mmap_object() instead of vm_mmap().

2017-02-12 20:54:31 +00:00

subr_unit.c

Clean up trailing whitespace

2017-01-14 04:16:13 +00:00

subr_vmem.c

subr_vmem: Fix double-free in error case of vmem_create

2016-05-11 23:16:11 +00:00

subr_witness.c

Make witness_warn() always print to the console.

2017-02-05 02:27:04 +00:00

sys_capability.c

capsicum: perform copyout without the fildesc lock held in sys_cap_ioctls_get

2016-10-21 16:12:23 +00:00

sys_generic.c

Add kern_pread() and kern_pwrite(), and use it in compats instead

2017-01-31 15:35:18 +00:00

sys_pipe.c

Generate syscall tables and update pipe() implementation after r302094.

2016-06-22 21:18:19 +00:00

sys_procdesc.c

Hide the boottime and bootimebin globals, provide the getboottime(9)

2016-07-27 11:08:59 +00:00

sys_process.c

Defer ptracestop() signals that cannot be delivered immediately

2017-02-20 15:53:16 +00:00

sys_socket.c

Set MORETOCOME for AIO write requests on a socket.

2017-01-06 23:41:45 +00:00

syscalls.c

Regenerate all the system call tables to drop "created from" lines.

2017-02-10 19:45:02 +00:00

syscalls.master

Rename the 'flags' argument to getfsstat() to 'mode' and validate it.

2016-12-27 20:21:11 +00:00

systrace_args.c

Regen after r310638.

2016-12-27 20:22:17 +00:00

sysv_ipc.c

…

sysv_msg.c

Remove a comment that was part of copied code, and is misleading in

2016-06-09 15:34:33 +00:00

sysv_sem.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

sysv_shm.c

Add shmatt_t.

2016-07-26 17:23:49 +00:00

tty_compat.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

tty_info.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

tty_inq.c

Check tty_gone() after allocating IO buffers. The tty lock has to be

2017-01-13 16:37:38 +00:00

tty_outq.c

Check tty_gone() after allocating IO buffers. The tty lock has to be

2017-01-13 16:37:38 +00:00

tty_pts.c

sys/kern: spelling fixes in comments.

2016-04-29 22:15:33 +00:00

tty_tty.c

…

tty_ttydisc.c

Don't clear the software flow control flag before draining for last

2016-01-26 14:46:39 +00:00

tty.c

Correct the comments about how much buffer is allocated.

2017-01-13 17:03:23 +00:00

uipc_accf.c

Use correct size type in do_setopt_accept_filter

2016-10-12 00:56:49 +00:00

uipc_debug.c

Refactor the AIO subsystem to permit file-type-specific handling and

2016-03-01 18:12:14 +00:00

uipc_domain.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

uipc_mbuf2.c

Remove writability requirement for single-mbuf, contiguous-range

2017-01-12 06:38:03 +00:00

uipc_mbuf.c

Suppress a warning about m_assertbuf being unused.

2017-01-15 03:53:20 +00:00

uipc_mbufhash.c

…

uipc_mqueue.c

Fix panic with unlocked vnode to vrecycle().

2017-02-18 05:07:53 +00:00

uipc_sem.c

Clean up some style(9) violations.

2016-04-14 17:07:26 +00:00

uipc_shm.c

Consistently handle negative or wrapping offsets in the mmap(2) syscalls.

2017-02-12 21:05:44 +00:00

uipc_sockbuf.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

uipc_socket.c

Merge filt_soread and filt_solisten and decide what to do when checking

2017-02-01 13:12:07 +00:00

uipc_syscalls.c

Add kern_listen(), kern_shutdown(), and kern_socket(), and use them

2017-01-30 12:57:22 +00:00

uipc_usrreq.c

For non-listening AF_UNIX sockets return error code EOPNOTSUPP to match

2017-01-25 22:26:45 +00:00

vfs_acl.c

…

vfs_aio.c

Rework r313352.

2017-02-13 09:04:38 +00:00

vfs_bio.c

Do not set BIO_DONE if the BIO specifies a completion handler.

2017-01-10 21:41:28 +00:00

vfs_cache.c

cache: use vrefact for '.' lookups and refing the rdir in fullpath

2017-01-30 03:20:05 +00:00

vfs_cluster.c

Move bogus_page declaration to vm_page.h and initialization to vm_page.c.

2017-01-04 22:27:19 +00:00

vfs_default.c

lockmgr: implement fast path

2017-02-12 09:49:44 +00:00

vfs_export.c

Fix build when no INET and INET6 in kernel config.

2016-11-17 16:13:30 +00:00

vfs_extattr.c

…

vfs_hash.c

Add vfs_hash_ref(9) function, which finds a vnode by the hash value

2016-05-11 06:32:22 +00:00

vfs_init.c

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00

vfs_lookup.c

Provide fallback VOP methods for crossmp vnode.

2017-01-22 19:36:02 +00:00

vfs_mount.c

Do not allocate struct statfs on kernel stack.

2017-01-05 17:19:26 +00:00

vfs_mountroot.c

Make root_mount_hold() work after boot. This is important for two

2017-02-06 20:44:34 +00:00

vfs_subr.c

vfs: use atomic_fcmpset in vfs_refcount_*

2017-02-05 03:23:16 +00:00

vfs_syscalls.c

Replace calls to sys_truncate() with kern_truncate().

2017-01-31 15:19:44 +00:00

vfs_vnops.c

Apply noexec mount option for mmap(PROT_EXEC).

2017-02-19 20:51:04 +00:00

vnode_if.src

Renumber license clauses in sys/kern to avoid skipping #3

2016-09-15 13:16:20 +00:00