Mercurial > hg > truffle
annotate src/share/vm/memory/permGen.hpp @ 3456:782e2bb60c41
7052494: Eclipse test fails on JDK 7 b142
Summary: Keep 'ne' test in Counted loop when we can't guarantee during compilation that init < limit.
Reviewed-by: never
author | kvn |
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date | Mon, 20 Jun 2011 16:45:35 -0700 |
parents | f95d63e2154a |
children | d2a62e0f25eb |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2010, 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 | |
1972 | 25 #ifndef SHARE_VM_MEMORY_PERMGEN_HPP |
26 #define SHARE_VM_MEMORY_PERMGEN_HPP | |
27 | |
28 #include "gc_interface/gcCause.hpp" | |
29 #include "memory/generation.hpp" | |
30 #include "memory/iterator.hpp" | |
31 #include "runtime/handles.hpp" | |
32 #include "runtime/mutexLocker.hpp" | |
33 #include "runtime/virtualspace.hpp" | |
34 | |
0 | 35 // All heaps contains a "permanent generation," containing permanent |
36 // (reflective) objects. This is like a regular generation in some ways, | |
37 // but unlike one in others, and so is split apart. | |
38 | |
39 class Generation; | |
40 class GenRemSet; | |
41 class CSpaceCounters; | |
42 | |
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43 // PermGen models the part of the heap used to allocate class meta-data. |
0 | 44 |
45 class PermGen : public CHeapObj { | |
46 friend class VMStructs; | |
47 protected: | |
48 size_t _capacity_expansion_limit; // maximum expansion allowed without a | |
605 | 49 // full gc occurring |
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50 void set_capacity_expansion_limit(size_t limit) { |
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51 assert_locked_or_safepoint(Heap_lock); |
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52 _capacity_expansion_limit = limit; |
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53 } |
0 | 54 |
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55 HeapWord* mem_allocate_in_gen(size_t size, Generation* gen); |
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56 // Along with mem_allocate_in_gen() above, implements policy for |
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57 // "scheduling" allocation/expansion/collection of the perm gen. |
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58 // The virtual method request_...() below can be overridden by |
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59 // subtypes that want to implement a different expansion/collection |
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60 // policy from the default provided. |
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61 virtual HeapWord* request_expand_and_allocate(Generation* gen, size_t size, |
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62 GCCause::Cause prev_cause); |
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63 |
0 | 64 public: |
65 enum Name { | |
66 MarkSweepCompact, MarkSweep, ConcurrentMarkSweep | |
67 }; | |
68 | |
69 // Permanent allocation (initialized) | |
70 virtual HeapWord* mem_allocate(size_t size) = 0; | |
71 | |
72 // Mark sweep support | |
73 virtual void compute_new_size() = 0; | |
74 | |
75 // Ideally, we would use MI (IMHO) but we'll do delegation instead. | |
76 virtual Generation* as_gen() const = 0; | |
77 | |
78 virtual void oop_iterate(OopClosure* cl) { | |
79 Generation* g = as_gen(); | |
80 assert(g != NULL, "as_gen() NULL"); | |
81 g->oop_iterate(cl); | |
82 } | |
83 | |
84 virtual void object_iterate(ObjectClosure* cl) { | |
85 Generation* g = as_gen(); | |
86 assert(g != NULL, "as_gen() NULL"); | |
87 g->object_iterate(cl); | |
88 } | |
89 | |
90 // Performance Counter support | |
91 virtual void update_counters() { | |
92 Generation* g = as_gen(); | |
93 assert(g != NULL, "as_gen() NULL"); | |
94 g->update_counters(); | |
95 } | |
96 }; | |
1972 | 97 |
98 #endif // SHARE_VM_MEMORY_PERMGEN_HPP |