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src/share/vm/memory/permGen.hpp@09d00c18e323 (annotated)
src/share/vm/memory/permGen.hpp
Wed, 15 Feb 2012 10:12:55 -0800
- author
- never
- date
- Wed, 15 Feb 2012 10:12:55 -0800
- changeset 3571
- 09d00c18e323
- parent 2314
- f95d63e2154a
- child 3900
- d2a62e0f25eb
- permissions
- -rw-r--r--
7145537: minor tweaks to LogEvents
Reviewed-by: kvn, twisti
| duke@435 | 1 | /* |
| ysr@2194 | 2 | * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_MEMORY_PERMGEN_HPP |
| stefank@2314 | 26 | #define SHARE_VM_MEMORY_PERMGEN_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "gc_interface/gcCause.hpp" |
| stefank@2314 | 29 | #include "memory/generation.hpp" |
| stefank@2314 | 30 | #include "memory/iterator.hpp" |
| stefank@2314 | 31 | #include "runtime/handles.hpp" |
| stefank@2314 | 32 | #include "runtime/mutexLocker.hpp" |
| stefank@2314 | 33 | #include "runtime/virtualspace.hpp" |
| stefank@2314 | 34 | |
| duke@435 | 35 | // All heaps contains a "permanent generation," containing permanent |
| duke@435 | 36 | // (reflective) objects. This is like a regular generation in some ways, |
| duke@435 | 37 | // but unlike one in others, and so is split apart. |
| duke@435 | 38 | |
| duke@435 | 39 | class Generation; |
| duke@435 | 40 | class GenRemSet; |
| duke@435 | 41 | class CSpaceCounters; |
| duke@435 | 42 | |
| ysr@2194 | 43 | // PermGen models the part of the heap used to allocate class meta-data. |
| duke@435 | 44 | |
| duke@435 | 45 | class PermGen : public CHeapObj { |
| duke@435 | 46 | friend class VMStructs; |
| duke@435 | 47 | protected: |
| duke@435 | 48 | size_t _capacity_expansion_limit; // maximum expansion allowed without a |
| twisti@1040 | 49 | // full gc occurring |
| ysr@2194 | 50 | void set_capacity_expansion_limit(size_t limit) { |
| ysr@2194 | 51 | assert_locked_or_safepoint(Heap_lock); |
| ysr@2194 | 52 | _capacity_expansion_limit = limit; |
| ysr@2194 | 53 | } |
| duke@435 | 54 | |
| apetrusenko@574 | 55 | HeapWord* mem_allocate_in_gen(size_t size, Generation* gen); |
| ysr@2194 | 56 | // Along with mem_allocate_in_gen() above, implements policy for |
| ysr@2194 | 57 | // "scheduling" allocation/expansion/collection of the perm gen. |
| ysr@2194 | 58 | // The virtual method request_...() below can be overridden by |
| ysr@2194 | 59 | // subtypes that want to implement a different expansion/collection |
| ysr@2194 | 60 | // policy from the default provided. |
| ysr@2194 | 61 | virtual HeapWord* request_expand_and_allocate(Generation* gen, size_t size, |
| ysr@2194 | 62 | GCCause::Cause prev_cause); |
| apetrusenko@574 | 63 | |
| duke@435 | 64 | public: |
| duke@435 | 65 | enum Name { |
| duke@435 | 66 | MarkSweepCompact, MarkSweep, ConcurrentMarkSweep |
| duke@435 | 67 | }; |
| duke@435 | 68 | |
| duke@435 | 69 | // Permanent allocation (initialized) |
| duke@435 | 70 | virtual HeapWord* mem_allocate(size_t size) = 0; |
| duke@435 | 71 | |
| duke@435 | 72 | // Mark sweep support |
| duke@435 | 73 | virtual void compute_new_size() = 0; |
| duke@435 | 74 | |
| duke@435 | 75 | // Ideally, we would use MI (IMHO) but we'll do delegation instead. |
| duke@435 | 76 | virtual Generation* as_gen() const = 0; |
| duke@435 | 77 | |
| duke@435 | 78 | virtual void oop_iterate(OopClosure* cl) { |
| duke@435 | 79 | Generation* g = as_gen(); |
| duke@435 | 80 | assert(g != NULL, "as_gen() NULL"); |
| duke@435 | 81 | g->oop_iterate(cl); |
| duke@435 | 82 | } |
| duke@435 | 83 | |
| duke@435 | 84 | virtual void object_iterate(ObjectClosure* cl) { |
| duke@435 | 85 | Generation* g = as_gen(); |
| duke@435 | 86 | assert(g != NULL, "as_gen() NULL"); |
| duke@435 | 87 | g->object_iterate(cl); |
| duke@435 | 88 | } |
| duke@435 | 89 | |
| duke@435 | 90 | // Performance Counter support |
| duke@435 | 91 | virtual void update_counters() { |
| duke@435 | 92 | Generation* g = as_gen(); |
| duke@435 | 93 | assert(g != NULL, "as_gen() NULL"); |
| duke@435 | 94 | g->update_counters(); |
| duke@435 | 95 | } |
| duke@435 | 96 | }; |
| stefank@2314 | 97 | |
| stefank@2314 | 98 | #endif // SHARE_VM_MEMORY_PERMGEN_HPP |
