Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/shared/immutableSpace.hpp @ 266:2214b226b7f0
6724367: par compact could clear less young gen summary data
Reviewed-by: jmasa, apetrusenko
author | jcoomes |
---|---|
date | Fri, 11 Jul 2008 16:11:50 -0700 |
parents | d1635bf93939 |
children | d1605aabd0a1 |
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/* * Copyright 2001-2006 Sun Microsystems, Inc. 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 * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ // An ImmutableSpace is a viewport into a contiguous range // (or subrange) of previously allocated objects. // Invariant: bottom() and end() are on page_size boundaries and // bottom() <= end() class ImmutableSpace: public CHeapObj { friend class VMStructs; protected: HeapWord* _bottom; HeapWord* _end; public: ImmutableSpace() { _bottom = NULL; _end = NULL; } HeapWord* bottom() const { return _bottom; } HeapWord* end() const { return _end; } MemRegion region() const { return MemRegion(bottom(), end()); } // Initialization void initialize(MemRegion mr); bool contains(const void* p) const { return _bottom <= p && p < _end; } // Size computations. Sizes are in bytes. size_t capacity_in_bytes() const { return capacity_in_words() * HeapWordSize; } // Size computations. Sizes are in heapwords. size_t capacity_in_words() const { return pointer_delta(end(), bottom()); } // Iteration. virtual void oop_iterate(OopClosure* cl); virtual void object_iterate(ObjectClosure* cl); // Debugging virtual void print() const PRODUCT_RETURN; virtual void print_short() const PRODUCT_RETURN; virtual void verify(bool allow_dirty); };