Mercurial > hg > truffle
annotate src/share/vm/ci/ciObjArrayKlass.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> |
|---|---|
| date | Mon, 15 Apr 2013 19:54:58 +0200 |
| parents | d8ce2825b193 |
| children | d13d7aba8c12 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2012, 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 | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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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_CI_CIOBJARRAYKLASS_HPP |
| 26 #define SHARE_VM_CI_CIOBJARRAYKLASS_HPP | |
| 27 | |
| 28 #include "ci/ciArrayKlass.hpp" | |
| 29 | |
| 0 | 30 // ciObjArrayKlass |
| 31 // | |
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32 // This class represents a Klass* in the HotSpot virtual machine |
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33 // whose Klass part is an ObjArrayKlass. |
| 0 | 34 class ciObjArrayKlass : public ciArrayKlass { |
| 35 CI_PACKAGE_ACCESS | |
| 36 friend class ciEnv; | |
| 37 | |
| 38 private: | |
| 39 ciKlass* _element_klass; | |
| 40 ciKlass* _base_element_klass; | |
| 41 | |
| 42 protected: | |
| 43 ciObjArrayKlass(KlassHandle h_k); | |
| 44 ciObjArrayKlass(ciSymbol* array_name, | |
| 45 ciKlass* base_element_klass, | |
| 46 int dimension); | |
| 47 | |
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48 ObjArrayKlass* get_ObjArrayKlass() { |
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49 return (ObjArrayKlass*)get_Klass(); |
| 0 | 50 } |
| 51 | |
| 52 static ciObjArrayKlass* make_impl(ciKlass* element_klass); | |
| 53 static ciSymbol* construct_array_name(ciSymbol* element_name, | |
| 54 int dimension); | |
| 55 | |
| 56 const char* type_string() { return "ciObjArrayKlass"; } | |
| 57 | |
| 58 oop loader() { return _base_element_klass->loader(); } | |
| 59 jobject loader_handle() { return _base_element_klass->loader_handle(); } | |
| 60 | |
| 61 oop protection_domain() { return _base_element_klass->protection_domain(); } | |
| 62 jobject protection_domain_handle() { return _base_element_klass->protection_domain_handle(); } | |
| 63 | |
| 64 | |
| 65 public: | |
| 66 // The one-level type of the array elements. | |
| 67 ciKlass* element_klass(); | |
| 68 | |
| 69 // The innermost type of the array elements. | |
| 70 ciKlass* base_element_klass() { return _base_element_klass; } | |
| 71 | |
| 72 // What kind of ciObject is this? | |
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73 bool is_obj_array_klass() const { return true; } |
| 0 | 74 |
| 75 static ciObjArrayKlass* make(ciKlass* element_klass); | |
| 76 }; | |
| 1972 | 77 |
| 78 #endif // SHARE_VM_CI_CIOBJARRAYKLASS_HPP |