8006fe8f75
Replaced MakeDeps and the includeDB files with more standardized solutions. Reviewed-by: coleenp, kvn, kamg
99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
/*
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* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_MEMORY_PERMGEN_HPP
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#define SHARE_VM_MEMORY_PERMGEN_HPP
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#include "gc_interface/gcCause.hpp"
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#include "memory/generation.hpp"
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#include "memory/iterator.hpp"
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#include "runtime/handles.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/virtualspace.hpp"
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// All heaps contains a "permanent generation," containing permanent
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// (reflective) objects. This is like a regular generation in some ways,
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// but unlike one in others, and so is split apart.
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class Generation;
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class GenRemSet;
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class CSpaceCounters;
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// PermGen models the part of the heap used to allocate class meta-data.
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class PermGen : public CHeapObj {
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friend class VMStructs;
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protected:
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size_t _capacity_expansion_limit; // maximum expansion allowed without a
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// full gc occurring
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void set_capacity_expansion_limit(size_t limit) {
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assert_locked_or_safepoint(Heap_lock);
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_capacity_expansion_limit = limit;
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}
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HeapWord* mem_allocate_in_gen(size_t size, Generation* gen);
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// Along with mem_allocate_in_gen() above, implements policy for
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// "scheduling" allocation/expansion/collection of the perm gen.
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// The virtual method request_...() below can be overridden by
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// subtypes that want to implement a different expansion/collection
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// policy from the default provided.
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virtual HeapWord* request_expand_and_allocate(Generation* gen, size_t size,
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GCCause::Cause prev_cause);
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public:
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enum Name {
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MarkSweepCompact, MarkSweep, ConcurrentMarkSweep
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};
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// Permanent allocation (initialized)
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virtual HeapWord* mem_allocate(size_t size) = 0;
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// Mark sweep support
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virtual void compute_new_size() = 0;
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// Ideally, we would use MI (IMHO) but we'll do delegation instead.
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virtual Generation* as_gen() const = 0;
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virtual void oop_iterate(OopClosure* cl) {
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Generation* g = as_gen();
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assert(g != NULL, "as_gen() NULL");
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g->oop_iterate(cl);
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}
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virtual void object_iterate(ObjectClosure* cl) {
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Generation* g = as_gen();
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assert(g != NULL, "as_gen() NULL");
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g->object_iterate(cl);
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}
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// Performance Counter support
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virtual void update_counters() {
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Generation* g = as_gen();
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assert(g != NULL, "as_gen() NULL");
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g->update_counters();
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}
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};
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#endif // SHARE_VM_MEMORY_PERMGEN_HPP
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