[src/netbsd-7]: src/doc tickets 996-999

[snj <snj%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4545dad8ec33
branches:  netbsd-7
changeset: 799641:4545dad8ec33
user:      snj <snj%NetBSD.org@localhost>
date:      Thu Nov 05 09:34:23 2015 +0000

description:
tickets 996-999

diffstat:

 doc/CHANGES-7.1 |  67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 66 insertions(+), 1 deletions(-)

diffs (78 lines):

diff -r 70cf49ba28a6 -r 4545dad8ec33 doc/CHANGES-7.1
--- a/doc/CHANGES-7.1   Thu Nov 05 09:30:10 2015 +0000
+++ b/doc/CHANGES-7.1   Thu Nov 05 09:34:23 2015 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: CHANGES-7.1,v 1.1.2.13 2015/11/05 05:27:45 riz Exp $
+# $NetBSD: CHANGES-7.1,v 1.1.2.14 2015/11/05 09:34:23 snj Exp $
 
 A complete list of changes from the NetBSD 7.0 release to the NetBSD 7.1
 release:
@@ -590,3 +590,68 @@
        Add Server Name Indication (SNI) support for https.
        [wiz, ticket #981]
 
+sys/kern/kern_exec.c                           1.419, 1.420
+sys/kern/kern_exit.c                           1.246, 1.247
+sys/kern/kern_synch.c                          1.309
+
+       In execve_runproc(), update the p_waited entry for the process
+       being moved to SSTOP state, not for its parent.  If the value is
+       not already zero, it could prevent its parent from waiting for
+       the process.  Fixes PR kern/50298
+       --
+       When clearing out the scheduler queues during system shutdown,
+       we move all processes to the SSTOP state.  Make sure we update
+       each process's p_waited and the parents' p_nstopchild counters
+       to maintain consistent values.  Fixes PR kern/50318
+       --
+       Currently, if a process is exiting and its parent has indicated
+       no intent of reaping the process (nor any other children), the
+       process will get reparented to init.  Since the state of the
+       exiting process at this point is SDEAD, proc_reparent() will not
+       update either the old or new parent's p_nstopchild counters.
+       This change causes both old and new parents to be properly
+       updated.  Fixes PR kern/50300
+       --
+       For processes marked with PS_STOPEXIT, update the process's
+       p_waited value, and update its parent's p_nstopchild value when
+       marking the process's p_stat to SSTOP.  The process needed to be
+       SACTIVE to get here, so this transition represents an additional
+       process for which the parent needs to wait.  Fixes PR kern/50308
+       --
+       In spawn_return() we temporarily move the process state to SSTOP,
+       but without updating its p_waited value or its parent's
+       p_nstopchild counter.  Later, we restore the original state,
+       again without any adjustment of the related values.  This leaves
+       a relatively short window when the values are inconsistent and
+       could interfere with the proper operation of sys_wait() for the
+       parent.  If during this window, any of the checks being made
+       result in an error, we call exit1() which will eventually migrate
+       the process's state to SDEAD (with an intermediate transition to
+       SDYING).  At this point the other variables get updated, and we
+       finally restore a consistent state.
+       This change updates the p_waited and parent's p_nstopchild at each
+       step to eliminate any windows during which the values could lead
+       to incorrect decisions.  Fixes PR kern/50330
+       [pgoyette, ticket #996]
+
+sys/kern/kern_sig.c                            1.321
+
+       When delivering a signal, it's possible that the process's state
+       in p_stat is SACTIVE yet p_sflag is PS_STOPPING (while waiting
+       for other LWPs to stop).  In that case, we don't want to adjust
+       the parent's p_nstopchild count.
+       [pgoyette, ticket #997]
+
+sys/compat/linux/arch/arm/linux_ptrace.c       1.19
+sys/compat/linux/arch/i386/linux_ptrace.c      1.31
+sys/compat/linux/arch/powerpc/linux_ptrace.c   1.29
+
+       Don't release proc_lock until we're done looking at things that
+       are protected by the lock, particularly p_stat and p_waited.
+       [pgoyette, ticket #998]
+
+sys/kern/kern_exit.c                           1.248
+
+       Update value of p_stat before we release the proc_lock.
+       [pgoyette, ticket #999]
+