Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/immutableSpace.hpp @ 1941:79d04223b8a5
Added caching for resolved types and resolved fields.
This is crucial, because the local load elimination will lead to wrong results, if field equality (of two RiField objects with the same object and the same RiType) is not given. The caching makes sure that the default equals implementation is sufficient.
| author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
|---|---|
| date | Tue, 28 Dec 2010 18:33:26 +0100 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2001, 2008, 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 | |
| 25 // An ImmutableSpace is a viewport into a contiguous range | |
| 26 // (or subrange) of previously allocated objects. | |
| 27 | |
| 28 // Invariant: bottom() and end() are on page_size boundaries and | |
| 29 // bottom() <= end() | |
| 30 | |
| 31 class ImmutableSpace: public CHeapObj { | |
| 32 friend class VMStructs; | |
| 33 protected: | |
| 34 HeapWord* _bottom; | |
| 35 HeapWord* _end; | |
| 36 | |
| 37 public: | |
| 38 ImmutableSpace() { _bottom = NULL; _end = NULL; } | |
| 39 HeapWord* bottom() const { return _bottom; } | |
| 40 HeapWord* end() const { return _end; } | |
| 41 | |
| 42 MemRegion region() const { return MemRegion(bottom(), end()); } | |
| 43 | |
| 44 // Initialization | |
| 45 void initialize(MemRegion mr); | |
| 46 | |
| 47 bool contains(const void* p) const { return _bottom <= p && p < _end; } | |
| 48 | |
| 49 // Size computations. Sizes are in bytes. | |
| 50 size_t capacity_in_bytes() const { return capacity_in_words() * HeapWordSize; } | |
| 51 | |
| 52 // Size computations. Sizes are in heapwords. | |
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53 size_t capacity_in_words() const { return pointer_delta(end(), bottom()); } |
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54 virtual size_t capacity_in_words(Thread*) const { return capacity_in_words(); } |
| 0 | 55 |
| 56 // Iteration. | |
| 57 virtual void oop_iterate(OopClosure* cl); | |
| 58 virtual void object_iterate(ObjectClosure* cl); | |
| 59 | |
| 60 // Debugging | |
| 61 virtual void print() const PRODUCT_RETURN; | |
| 62 virtual void print_short() const PRODUCT_RETURN; | |
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63 virtual void verify(bool allow_dirty); |
| 0 | 64 }; |