[src/trunk]: src/sys/compat/irix Added a cleanup function for the (un)shared ...

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

details:   https://anonhg.NetBSD.org/src/rev/0c4dee7a0ee5
branches:  trunk
changeset: 538634:0c4dee7a0ee5
user:      manu <manu%NetBSD.org@localhost>
date:      Wed Oct 23 21:30:46 2002 +0000

description:
Added a cleanup function for the (un)shared region list, so that it does
not grow forever.

diffstat:

 sys/compat/irix/irix_prctl.c |  53 ++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 51 insertions(+), 2 deletions(-)

diffs (91 lines):

diff -r 6f323e78348f -r 0c4dee7a0ee5 sys/compat/irix/irix_prctl.c
--- a/sys/compat/irix/irix_prctl.c      Wed Oct 23 20:45:38 2002 +0000
+++ b/sys/compat/irix/irix_prctl.c      Wed Oct 23 21:30:46 2002 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: irix_prctl.c,v 1.18 2002/10/14 21:14:25 manu Exp $ */
+/*     $NetBSD: irix_prctl.c,v 1.19 2002/10/23 21:30:46 manu Exp $ */
 
 /*-
  * Copyright (c) 2001-2002 The NetBSD Foundation, Inc.
@@ -37,7 +37,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: irix_prctl.c,v 1.18 2002/10/14 21:14:25 manu Exp $");
+__KERNEL_RCSID(0, "$NetBSD: irix_prctl.c,v 1.19 2002/10/23 21:30:46 manu Exp $");
 
 #include <sys/errno.h>
 #include <sys/types.h>
@@ -85,6 +85,7 @@
 #ifdef DEBUG_IRIX
 static void irix_isrr_debug __P((struct proc *));
 #endif
+static void irix_isrr_cleanup __P((struct proc *));
 
 int
 irix_sys_prctl(p, v, retval)
@@ -852,6 +853,10 @@
 #ifdef DEBUG_IRIX
                                irix_isrr_debug(p);
 #endif
+                               irix_isrr_cleanup(p);
+#ifdef DEBUG_IRIX
+                               irix_isrr_debug(p);
+#endif
                                return;
                        }
 
@@ -902,9 +907,53 @@
 #ifdef DEBUG_IRIX
        irix_isrr_debug(p);
 #endif
+       irix_isrr_cleanup(p);
+#ifdef DEBUG_IRIX
+       irix_isrr_debug(p);
+#endif
        return;
 }
 
+/*
+ * Cleanup the region list by 
+ * (1) removing regions with length 0, and
+ * (2) merging contiguous regions with the same status
+ */
+static void
+irix_isrr_cleanup(p)
+       struct proc *p;
+{
+       struct irix_emuldata *ied = (struct irix_emuldata *)p->p_emuldata;
+       struct irix_shared_regions_rec *isrr;
+       struct irix_shared_regions_rec *new_isrr;
+       
+       isrr = LIST_FIRST(&ied->ied_shared_regions);
+       do {
+               new_isrr = LIST_NEXT(isrr, isrr_list);
+
+               if (isrr->isrr_len == 0) {
+                       LIST_REMOVE(isrr, isrr_list);
+                       free(isrr, M_EMULDATA);
+                       isrr = new_isrr;
+                       if (isrr == NULL)
+                               break;
+               }
+
+               if (new_isrr == NULL)
+                       break;
+
+               if (isrr->isrr_shared == new_isrr->isrr_shared) {
+                       isrr->isrr_len += new_isrr->isrr_len;
+                       new_isrr->isrr_len = 0;
+               }
+
+               isrr = new_isrr;
+       } while (1);
+
+       return;
+}
+
+
 #ifdef DEBUG_IRIX
 static void
 irix_isrr_debug(p)