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src/share/vm/gc_implementation/g1/g1MarkSweep.hpp@04ff2f6cd0eb (annotated)
src/share/vm/gc_implementation/g1/g1MarkSweep.hpp
Tue, 17 Oct 2017 12:58:25 +0800
- author
- aoqi
- date
- Tue, 17 Oct 2017 12:58:25 +0800
- changeset 7994
- 04ff2f6cd0eb
- parent 7535
- 7ae4e26cb1e0
- permissions
- -rw-r--r--
merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP |
| aoqi@0 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| aoqi@0 | 29 | #include "gc_implementation/g1/heapRegion.hpp" |
| aoqi@0 | 30 | #include "memory/genMarkSweep.hpp" |
| aoqi@0 | 31 | #include "memory/generation.hpp" |
| aoqi@0 | 32 | #include "memory/universe.hpp" |
| aoqi@0 | 33 | #include "oops/markOop.hpp" |
| aoqi@0 | 34 | #include "oops/oop.hpp" |
| aoqi@0 | 35 | #include "runtime/timer.hpp" |
| aoqi@0 | 36 | #include "utilities/growableArray.hpp" |
| aoqi@0 | 37 | |
| aoqi@0 | 38 | class ReferenceProcessor; |
| aoqi@0 | 39 | |
| aoqi@0 | 40 | // G1MarkSweep takes care of global mark-compact garbage collection for a |
| aoqi@0 | 41 | // G1CollectedHeap using a four-phase pointer forwarding algorithm. All |
| aoqi@0 | 42 | // generations are assumed to support marking; those that can also support |
| aoqi@0 | 43 | // compaction. |
| aoqi@0 | 44 | // |
| aoqi@0 | 45 | // Class unloading will only occur when a full gc is invoked. |
| sjohanss@7131 | 46 | class G1PrepareCompactClosure; |
| aoqi@0 | 47 | |
| aoqi@0 | 48 | class G1MarkSweep : AllStatic { |
| aoqi@0 | 49 | friend class VM_G1MarkSweep; |
| aoqi@0 | 50 | friend class Scavenge; |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | public: |
| aoqi@0 | 53 | |
| aoqi@0 | 54 | static void invoke_at_safepoint(ReferenceProcessor* rp, |
| aoqi@0 | 55 | bool clear_all_softrefs); |
| aoqi@0 | 56 | |
| aoqi@0 | 57 | static STWGCTimer* gc_timer() { return GenMarkSweep::_gc_timer; } |
| aoqi@0 | 58 | static SerialOldTracer* gc_tracer() { return GenMarkSweep::_gc_tracer; } |
| aoqi@0 | 59 | |
| aoqi@0 | 60 | private: |
| aoqi@0 | 61 | |
| aoqi@0 | 62 | // Mark live objects |
| aoqi@0 | 63 | static void mark_sweep_phase1(bool& marked_for_deopt, |
| aoqi@0 | 64 | bool clear_all_softrefs); |
| aoqi@0 | 65 | // Calculate new addresses |
| aoqi@0 | 66 | static void mark_sweep_phase2(); |
| aoqi@0 | 67 | // Update pointers |
| aoqi@0 | 68 | static void mark_sweep_phase3(); |
| aoqi@0 | 69 | // Move objects to new positions |
| aoqi@0 | 70 | static void mark_sweep_phase4(); |
| aoqi@0 | 71 | |
| aoqi@0 | 72 | static void allocate_stacks(); |
| sjohanss@7131 | 73 | static void prepare_compaction(); |
| sjohanss@7131 | 74 | static void prepare_compaction_work(G1PrepareCompactClosure* blk); |
| sjohanss@7131 | 75 | }; |
| sjohanss@7131 | 76 | |
| sjohanss@7131 | 77 | class G1PrepareCompactClosure : public HeapRegionClosure { |
| sjohanss@7131 | 78 | protected: |
| sjohanss@7131 | 79 | G1CollectedHeap* _g1h; |
| sjohanss@7131 | 80 | ModRefBarrierSet* _mrbs; |
| sjohanss@7131 | 81 | CompactPoint _cp; |
| sjohanss@7131 | 82 | HeapRegionSetCount _humongous_regions_removed; |
| sjohanss@7131 | 83 | |
| sjohanss@7131 | 84 | virtual void prepare_for_compaction(HeapRegion* hr, HeapWord* end); |
| sjohanss@7131 | 85 | void prepare_for_compaction_work(CompactPoint* cp, HeapRegion* hr, HeapWord* end); |
| sjohanss@7131 | 86 | void free_humongous_region(HeapRegion* hr); |
| sjohanss@7131 | 87 | bool is_cp_initialized() const { return _cp.space != NULL; } |
| sjohanss@7131 | 88 | |
| sjohanss@7131 | 89 | public: |
| sjohanss@7131 | 90 | G1PrepareCompactClosure() : |
| sjohanss@7131 | 91 | _g1h(G1CollectedHeap::heap()), |
| sjohanss@7131 | 92 | _mrbs(_g1h->g1_barrier_set()), |
| sjohanss@7131 | 93 | _humongous_regions_removed() { } |
| sjohanss@7131 | 94 | |
| sjohanss@7131 | 95 | void update_sets(); |
| sjohanss@7131 | 96 | bool doHeapRegion(HeapRegion* hr); |
| aoqi@0 | 97 | }; |
| aoqi@0 | 98 | |
| aoqi@0 | 99 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1MARKSWEEP_HPP |
