Mercurial > hg > truffle
annotate src/share/vm/oops/klass.inline.hpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Mon, 15 Apr 2013 19:54:58 +0200 |
parents | f95d63e2154a |
children | 740e263c80c6 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_KLASS_INLINE_HPP |
26 #define SHARE_VM_OOPS_KLASS_INLINE_HPP | |
27 | |
28 #include "oops/klass.hpp" | |
29 #include "oops/markOop.hpp" | |
30 | |
0 | 31 inline void Klass::set_prototype_header(markOop header) { |
32 assert(!header->has_bias_pattern() || oop_is_instance(), "biased locking currently only supported for Java instances"); | |
33 _prototype_header = header; | |
34 } | |
1972 | 35 |
36 #endif // SHARE_VM_OOPS_KLASS_INLINE_HPP |