Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1MarkSweep.hpp @ 20795:ae52ee069062
8062063: Usage of UseHugeTLBFS, UseLargePagesInMetaspace and huge SurvivorAlignmentInBytes cause crashes in CMBitMapClosure::do_bit
Summary: Making sure committed memory is cleared when re-committed, even if using large pages.
Reviewed-by: jwilhelm, tschatzl
author | sjohanss |
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date | Mon, 12 Jan 2015 15:24:29 +0100 |
parents | d35872270666 |
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rev | line source |
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342 | 1 /* |
10405 | 2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
342 | 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. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP | |
27 | |
28 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
29 #include "gc_implementation/g1/heapRegion.hpp" | |
30 #include "memory/genMarkSweep.hpp" | |
31 #include "memory/generation.hpp" | |
32 #include "memory/universe.hpp" | |
33 #include "oops/markOop.hpp" | |
34 #include "oops/oop.hpp" | |
35 #include "runtime/timer.hpp" | |
36 #include "utilities/growableArray.hpp" | |
37 | |
342 | 38 class ReferenceProcessor; |
39 | |
40 // G1MarkSweep takes care of global mark-compact garbage collection for a | |
41 // G1CollectedHeap using a four-phase pointer forwarding algorithm. All | |
42 // generations are assumed to support marking; those that can also support | |
43 // compaction. | |
44 // | |
45 // Class unloading will only occur when a full gc is invoked. | |
20417 | 46 class G1PrepareCompactClosure; |
342 | 47 |
48 class G1MarkSweep : AllStatic { | |
49 friend class VM_G1MarkSweep; | |
50 friend class Scavenge; | |
51 | |
52 public: | |
53 | |
54 static void invoke_at_safepoint(ReferenceProcessor* rp, | |
55 bool clear_all_softrefs); | |
56 | |
10405 | 57 static STWGCTimer* gc_timer() { return GenMarkSweep::_gc_timer; } |
58 static SerialOldTracer* gc_tracer() { return GenMarkSweep::_gc_tracer; } | |
59 | |
342 | 60 private: |
61 | |
62 // Mark live objects | |
63 static void mark_sweep_phase1(bool& marked_for_deopt, | |
64 bool clear_all_softrefs); | |
65 // Calculate new addresses | |
66 static void mark_sweep_phase2(); | |
67 // Update pointers | |
68 static void mark_sweep_phase3(); | |
69 // Move objects to new positions | |
70 static void mark_sweep_phase4(); | |
71 | |
72 static void allocate_stacks(); | |
20417 | 73 static void prepare_compaction(); |
74 static void prepare_compaction_work(G1PrepareCompactClosure* blk); | |
75 }; | |
76 | |
77 class G1PrepareCompactClosure : public HeapRegionClosure { | |
78 protected: | |
79 G1CollectedHeap* _g1h; | |
80 ModRefBarrierSet* _mrbs; | |
81 CompactPoint _cp; | |
82 HeapRegionSetCount _humongous_regions_removed; | |
83 | |
84 virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end); | |
85 void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end); | |
86 void free_humongous_region(HeapRegion* hr); | |
87 bool is_cp_initialized() const { return _cp.space != NULL; } | |
88 | |
89 public: | |
90 G1PrepareCompactClosure() : | |
91 _g1h(G1CollectedHeap::heap()), | |
92 _mrbs(_g1h->g1_barrier_set()), | |
93 _humongous_regions_removed() { } | |
94 | |
95 void update_sets(); | |
96 bool doHeapRegion(HeapRegion* hr); | |
342 | 97 }; |
1972 | 98 |
99 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP |