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8167650: NMT should check for invalid MEMFLAGS

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Reviewed-by: dholmes, mockner, cjplummer
This commit is contained in:
Thomas Stuefe 2016-11-23 14:33:45 +01:00
parent 9439c78ffa
commit 5eecf3f1e6
1 changed files with 5 additions and 2 deletions
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7
hotspot/src/share/vm/services/nmtCommon.hpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, 2016, 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
@ -55,7 +55,9 @@ class NMTUtil : AllStatic {
public:
// Map memory type to index
static inline int flag_to_index(MEMFLAGS flag) {
return (flag & 0xff);
const int index = flag & 0xff;
assert(index >= 0 && index < (int)mt_number_of_types, "Index out of bounds");
return index;
}
// Map memory type to human readable name
@ -65,6 +67,7 @@ class NMTUtil : AllStatic {
// Map an index to memory type
static MEMFLAGS index_to_flag(int index) {
assert(index >= 0 && index < (int) mt_number_of_types, "Index out of bounds");
return (MEMFLAGS)index;
}