Sat, 07 Nov 2020 10:30:02 +0800
Added tag mips-jdk8u275-b01 for changeset d3b4d62f391f
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP |
aoqi@0 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP |
aoqi@0 | 27 | |
aoqi@0 | 28 | #include "memory/iterator.hpp" |
aoqi@0 | 29 | |
aoqi@0 | 30 | // An ImmutableSpace is a viewport into a contiguous range |
aoqi@0 | 31 | // (or subrange) of previously allocated objects. |
aoqi@0 | 32 | |
aoqi@0 | 33 | // Invariant: bottom() and end() are on page_size boundaries and |
aoqi@0 | 34 | // bottom() <= end() |
aoqi@0 | 35 | |
aoqi@0 | 36 | class ImmutableSpace: public CHeapObj<mtGC> { |
aoqi@0 | 37 | friend class VMStructs; |
aoqi@0 | 38 | protected: |
aoqi@0 | 39 | HeapWord* _bottom; |
aoqi@0 | 40 | HeapWord* _end; |
aoqi@0 | 41 | |
aoqi@0 | 42 | public: |
aoqi@0 | 43 | ImmutableSpace() { _bottom = NULL; _end = NULL; } |
aoqi@0 | 44 | HeapWord* bottom() const { return _bottom; } |
aoqi@0 | 45 | HeapWord* end() const { return _end; } |
aoqi@0 | 46 | |
aoqi@0 | 47 | MemRegion region() const { return MemRegion(bottom(), end()); } |
aoqi@0 | 48 | |
aoqi@0 | 49 | // Initialization |
aoqi@0 | 50 | void initialize(MemRegion mr); |
aoqi@0 | 51 | |
aoqi@0 | 52 | bool contains(const void* p) const { return _bottom <= p && p < _end; } |
aoqi@0 | 53 | |
aoqi@0 | 54 | // Size computations. Sizes are in bytes. |
aoqi@0 | 55 | size_t capacity_in_bytes() const { return capacity_in_words() * HeapWordSize; } |
aoqi@0 | 56 | |
aoqi@0 | 57 | // Size computations. Sizes are in heapwords. |
aoqi@0 | 58 | size_t capacity_in_words() const { return pointer_delta(end(), bottom()); } |
aoqi@0 | 59 | virtual size_t capacity_in_words(Thread*) const { return capacity_in_words(); } |
aoqi@0 | 60 | |
aoqi@0 | 61 | // Iteration. |
aoqi@0 | 62 | virtual void oop_iterate(ExtendedOopClosure* cl); |
aoqi@0 | 63 | virtual void object_iterate(ObjectClosure* cl); |
aoqi@0 | 64 | |
aoqi@0 | 65 | // Debugging |
aoqi@0 | 66 | virtual void print() const PRODUCT_RETURN; |
aoqi@0 | 67 | virtual void print_short() const PRODUCT_RETURN; |
aoqi@0 | 68 | virtual void verify(); |
aoqi@0 | 69 | }; |
aoqi@0 | 70 | |
aoqi@0 | 71 | #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_IMMUTABLESPACE_HPP |