Date: Tue, 17 Nov 2009 11:39:15 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/ddb db_command.c src/sys/kern kern_sig.c tty.c src/sys/sys signal.h signalvar.h Message-ID: <200911171139.nAHBdulb095502@repoman.freebsd.org>
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kib 2009-11-17 11:39:15 UTC
FreeBSD src repository
Modified files:
sys/ddb db_command.c
sys/kern kern_sig.c tty.c
sys/sys signal.h signalvar.h
Log:
SVN rev 199355 on 2009-11-17 11:39:15Z by kib
Among signal generation syscalls, only sigqueue(2) is allowed by POSIX
to fail due to lack of resources to queue siginfo. Add KSI_SIGQ flag
that allows sigqueue_add() to fail while trying to allocate memory for
new siginfo. When the flag is not set, behaviour is the same as for
KSI_TRAP: if memory cannot be allocated, set bit in sq_kill. KSI_TRAP is
kept to preserve KBI.
Add SI_KERNEL si_code, to be used in siginfo.si_code when signal is
generated by kernel. Deliver siginfo when signal is generated by kill(2)
family of syscalls (SI_USER with properly filled si_uid and si_pid), or
by kernel (SI_KERNEL, mostly job control or SIGIO). Since KSI_SIGQ flag
is not set for the ksi, low memory condition cause old behaviour.
Keep psignal(9) KBI intact, but modify it to generate SI_KERNEL
si_code. Pgsignal(9) and gsignal(9) now take ksi explicitely. Add
pksignal(9) that behaves like psignal but takes ksi, and ddb kill
command implemented as pksignal(..., ksi = NULL) to not do allocation
while in debugger.
While there, remove some register specifiers and use ANSI C prototypes.
Reviewed by: davidxu
MFC after: 1 month
Revision Changes Path
1.81 +1 -1 src/sys/ddb/db_command.c
1.383 +53 -29 src/sys/kern/kern_sig.c
1.333 +14 -2 src/sys/kern/tty.c
1.59 +1 -0 src/sys/sys/signal.h
1.84 +5 -3 src/sys/sys/signalvar.h
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