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From: "Pedro F. Giffuni" <pfg@FreeBSD.org>
Date: Wed, 24 Feb 2016 16:52:03 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r295973 - head/lib/libc/db/btree
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Author: pfg
Date: Wed Feb 24 16:52:03 2016
New Revision: 295973
URL: https://svnweb.freebsd.org/changeset/base/295973

Log:
  db(3): Fix aliasing warnings from modern GCC.
  
  Obtained from:	NetBSD (CVS Rev. 1.20)

Modified:
  head/lib/libc/db/btree/bt_split.c

Modified: head/lib/libc/db/btree/bt_split.c
==============================================================================
--- head/lib/libc/db/btree/bt_split.c	Wed Feb 24 16:50:34 2016	(r295972)
+++ head/lib/libc/db/btree/bt_split.c	Wed Feb 24 16:52:03 2016	(r295973)
@@ -236,9 +236,12 @@ __bt_split(BTREE *t, PAGE *sp, const DBT
 			WR_BINTERNAL(dest, nksize ? nksize : bl->ksize,
 			    rchild->pgno, bl->flags & P_BIGKEY);
 			memmove(dest, bl->bytes, nksize ? nksize : bl->ksize);
-			if (bl->flags & P_BIGKEY &&
-			    bt_preserve(t, *(pgno_t *)bl->bytes) == RET_ERROR)
-				goto err1;
+			if (bl->flags & P_BIGKEY) {
+				pgno_t pgno;
+				memcpy(&pgno, bl->bytes, sizeof(pgno));
+				if (bt_preserve(t, pgno) == RET_ERROR)
+					goto err1;
+			}
 			break;
 		case P_RINTERNAL:
 			/*
@@ -544,9 +547,12 @@ bt_broot(BTREE *t, PAGE *h, PAGE *l, PAG
 		 * If the key is on an overflow page, mark the overflow chain
 		 * so it isn't deleted when the leaf copy of the key is deleted.
 		 */
-		if (bl->flags & P_BIGKEY &&
-		    bt_preserve(t, *(pgno_t *)bl->bytes) == RET_ERROR)
-			return (RET_ERROR);
+	if (bl->flags & P_BIGKEY) {
+			pgno_t pgno;
+			memcpy(&pgno, bl->bytes, sizeof(pgno));
+			if (bt_preserve(t, pgno) == RET_ERROR)
+				return (RET_ERROR);
+		}
 		break;
 	case P_BINTERNAL:
 		bi = GETBINTERNAL(r, 0);