diff -r 000000000000 -r 6474c204b198 js/src/yarr/PageBlock.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/yarr/PageBlock.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,92 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "yarr/PageBlock.h"
+#include "assembler/wtf/Assertions.h"
+
+#if WTF_OS_UNIX && !WTF_OS_SYMBIAN
+#include <unistd.h>
+#endif
+
+#if WTF_OS_WINDOWS
+#include <malloc.h>
+#include <windows.h>
+#endif
+
+#if WTF_OS_SYMBIAN
+#include <e32hal.h>
+#include <e32std.h>
+#endif
+
+#if WTF_OS_OS2
+#include <stdlib.h>
+#endif
+
+namespace WTF {
+
+static size_t s_pageSize;
+
+#if (WTF_OS_UNIX && !WTF_OS_SYMBIAN) || WTF_OS_OS2
+
+inline size_t systemPageSize()
+{
+    return getpagesize();
+}
+
+#elif WTF_OS_WINDOWS
+
+inline size_t systemPageSize()
+{
+    static size_t size = 0;
+    SYSTEM_INFO system_info;
+    GetSystemInfo(&system_info);
+    size = system_info.dwPageSize;
+    return size;
+}
+
+#elif WTF_OS_SYMBIAN
+
+inline size_t systemPageSize()
+{
+    static TInt page_size = 0;
+    UserHal::PageSizeInBytes(page_size);
+    return page_size;
+}
+
+#endif
+
+size_t pageSize()
+{
+    if (!s_pageSize)
+        s_pageSize = systemPageSize();
+    ASSERT(isPowerOfTwo(s_pageSize));
+    return s_pageSize;
+}
+
+} // namespace WTF