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8264827: Large mapped buffer/segment crash the VM when calling isLoaded

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Reviewed-by: alanb, mcimadamore
This commit is contained in:
Chris Hegarty 2021-04-12 11:21:34 +00:00
parent e604320bbd
commit 3c9858ddfb
5 changed files with 36 additions and 13 deletions
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6
src/java.base/share/classes/java/nio/Bits.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -75,8 +75,8 @@ class Bits { // package-private
return PAGE_SIZE;
}
static int pageCount(long size) {
return (int)(size + (long)pageSize() - 1L) / pageSize();
static long pageCount(long size) {
return (size + (long)pageSize() - 1L) / pageSize();
}
private static boolean UNALIGNED = UNSAFE.unalignedAccess();