[src/trunk]: src/sys/rump/librump/rumpkern Emulate malloc(9) a little better ...

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

details:   https://anonhg.NetBSD.org/src/rev/2c025128d92b
branches:  trunk
changeset: 756184:2c025128d92b
user:      pooka <pooka%NetBSD.org@localhost>
date:      Thu Jul 08 11:39:58 2010 +0000

description:
Emulate malloc(9) a little better by panicking if a should-not-fail
allocation fails.  We could invoke the pagedaemon here, but since
malloc(9) is panicky when it runs out of kmem_map, let's do the
"same".

diffstat:

 sys/rump/librump/rumpkern/memalloc.c |  8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diffs (29 lines):

diff -r df4c6685a85a -r 2c025128d92b sys/rump/librump/rumpkern/memalloc.c
--- a/sys/rump/librump/rumpkern/memalloc.c      Thu Jul 08 11:24:59 2010 +0000
+++ b/sys/rump/librump/rumpkern/memalloc.c      Thu Jul 08 11:39:58 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: memalloc.c,v 1.9 2010/06/14 21:04:56 pooka Exp $       */
+/*     $NetBSD: memalloc.c,v 1.10 2010/07/08 11:39:58 pooka Exp $      */
 
 /*
  * Copyright (c) 2009 Antti Kantee.  All Rights Reserved.
@@ -26,7 +26,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: memalloc.c,v 1.9 2010/06/14 21:04:56 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: memalloc.c,v 1.10 2010/07/08 11:39:58 pooka Exp $");
 
 #include <sys/param.h>
 #include <sys/kmem.h>
@@ -74,6 +74,10 @@
        void *rv;
 
        rv = rumpuser_malloc(size, 0);
+
+       if (__predict_false(rv == NULL && (flags & (M_CANFAIL|M_NOWAIT)) == 0))
+               panic("malloc %lu bytes failed", size);
+
        if (rv && flags & M_ZERO)
                memset(rv, 0, size);