truffle: src/share/vm/gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp annotate

annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp @ 143:b5489bb705c9

6662086: 6u4+, 7b11+: CMS never clears referents when -XX:+ParallelRefProcEnabled Summary: Construct the relevant CMSIsAliveClosure used by CMS during parallel reference processing with the correct span. It had incorrectly been constructed with an empty span, a regression introduced in 6417901. Reviewed-by: jcoomes

author	ysr
date	Tue, 06 May 2008 15:37:36 -0700
parents	ba764ed4b6f2
children	00b023ae2d78

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
a61af66fc99e Initial load duke parents: diff changeset	2 * Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved.
a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
a61af66fc99e Initial load duke parents: diff changeset	19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
a61af66fc99e Initial load duke parents: diff changeset	20 * CA 95054 USA or visit www.sun.com if you need additional information or
a61af66fc99e Initial load duke parents: diff changeset	21 * have any questions.
a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
a61af66fc99e Initial load duke parents: diff changeset	25 /////////////////////////////////////////////////////////////////
a61af66fc99e Initial load duke parents: diff changeset	26 // Closures used by ConcurrentMarkSweepGeneration's collector
a61af66fc99e Initial load duke parents: diff changeset	27 /////////////////////////////////////////////////////////////////
a61af66fc99e Initial load duke parents: diff changeset	28 class ConcurrentMarkSweepGeneration;
a61af66fc99e Initial load duke parents: diff changeset	29 class CMSBitMap;
a61af66fc99e Initial load duke parents: diff changeset	30 class CMSMarkStack;
a61af66fc99e Initial load duke parents: diff changeset	31 class CMSCollector;
a61af66fc99e Initial load duke parents: diff changeset	32 class MarkFromRootsClosure;
a61af66fc99e Initial load duke parents: diff changeset	33 class Par_MarkFromRootsClosure;
a61af66fc99e Initial load duke parents: diff changeset	34
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	35 // Decode the oop and call do_oop on it.
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	36 #define DO_OOP_WORK_DEFN \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	37 void do_oop(oop obj); \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	38 template <class T> inline void do_oop_work(T* p) { \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	39 T heap_oop = oopDesc::load_heap_oop(p); \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	40 if (!oopDesc::is_null(heap_oop)) { \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	41 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	42 do_oop(obj); \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	43 } \
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	44 }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	45
0 a61af66fc99e Initial load duke parents: diff changeset	46 class MarkRefsIntoClosure: public OopsInGenClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	47 private:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	48 const MemRegion _span;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	49 CMSBitMap* _bitMap;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	50 const bool _should_do_nmethods;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	51 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	52 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	53 public:
a61af66fc99e Initial load duke parents: diff changeset	54 MarkRefsIntoClosure(MemRegion span, CMSBitMap* bitMap,
a61af66fc99e Initial load duke parents: diff changeset	55 bool should_do_nmethods);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	56 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	57 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	58 inline void do_oop_nv(oop* p) { MarkRefsIntoClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	59 inline void do_oop_nv(narrowOop* p) { MarkRefsIntoClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	60 bool do_header() { return true; }
a61af66fc99e Initial load duke parents: diff changeset	61 virtual const bool do_nmethods() const {
a61af66fc99e Initial load duke parents: diff changeset	62 return _should_do_nmethods;
a61af66fc99e Initial load duke parents: diff changeset	63 }
a61af66fc99e Initial load duke parents: diff changeset	64 Prefetch::style prefetch_style() {
a61af66fc99e Initial load duke parents: diff changeset	65 return Prefetch::do_read;
a61af66fc99e Initial load duke parents: diff changeset	66 }
a61af66fc99e Initial load duke parents: diff changeset	67 };
a61af66fc99e Initial load duke parents: diff changeset	68
a61af66fc99e Initial load duke parents: diff changeset	69 // A variant of the above used in certain kinds of CMS
a61af66fc99e Initial load duke parents: diff changeset	70 // marking verification.
a61af66fc99e Initial load duke parents: diff changeset	71 class MarkRefsIntoVerifyClosure: public OopsInGenClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	72 private:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	73 const MemRegion _span;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	74 CMSBitMap* _verification_bm;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	75 CMSBitMap* _cms_bm;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	76 const bool _should_do_nmethods;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	77 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	78 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	79 public:
a61af66fc99e Initial load duke parents: diff changeset	80 MarkRefsIntoVerifyClosure(MemRegion span, CMSBitMap* verification_bm,
a61af66fc99e Initial load duke parents: diff changeset	81 CMSBitMap* cms_bm, bool should_do_nmethods);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	82 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	83 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	84 inline void do_oop_nv(oop* p) { MarkRefsIntoVerifyClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	85 inline void do_oop_nv(narrowOop* p) { MarkRefsIntoVerifyClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	86 bool do_header() { return true; }
a61af66fc99e Initial load duke parents: diff changeset	87 virtual const bool do_nmethods() const {
a61af66fc99e Initial load duke parents: diff changeset	88 return _should_do_nmethods;
a61af66fc99e Initial load duke parents: diff changeset	89 }
a61af66fc99e Initial load duke parents: diff changeset	90 Prefetch::style prefetch_style() {
a61af66fc99e Initial load duke parents: diff changeset	91 return Prefetch::do_read;
a61af66fc99e Initial load duke parents: diff changeset	92 }
a61af66fc99e Initial load duke parents: diff changeset	93 };
a61af66fc99e Initial load duke parents: diff changeset	94
a61af66fc99e Initial load duke parents: diff changeset	95 // The non-parallel version (the parallel version appears further below).
a61af66fc99e Initial load duke parents: diff changeset	96 class PushAndMarkClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	97 private:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	98 CMSCollector* _collector;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	99 MemRegion _span;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	100 CMSBitMap* _bit_map;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	101 CMSBitMap* _mod_union_table;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	102 CMSMarkStack* _mark_stack;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	103 CMSMarkStack* _revisit_stack;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	104 bool _concurrent_precleaning;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	105 bool const _should_remember_klasses;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	106 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	107 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	108 public:
a61af66fc99e Initial load duke parents: diff changeset	109 PushAndMarkClosure(CMSCollector* collector,
a61af66fc99e Initial load duke parents: diff changeset	110 MemRegion span,
a61af66fc99e Initial load duke parents: diff changeset	111 ReferenceProcessor* rp,
a61af66fc99e Initial load duke parents: diff changeset	112 CMSBitMap* bit_map,
a61af66fc99e Initial load duke parents: diff changeset	113 CMSBitMap* mod_union_table,
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	114 CMSMarkStack* mark_stack,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	115 CMSMarkStack* revisit_stack,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	116 bool concurrent_precleaning);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	117 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	118 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	119 inline void do_oop_nv(oop* p) { PushAndMarkClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	120 inline void do_oop_nv(narrowOop* p) { PushAndMarkClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	121 bool do_header() { return true; }
a61af66fc99e Initial load duke parents: diff changeset	122 Prefetch::style prefetch_style() {
a61af66fc99e Initial load duke parents: diff changeset	123 return Prefetch::do_read;
a61af66fc99e Initial load duke parents: diff changeset	124 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	125 virtual const bool should_remember_klasses() const {
0 a61af66fc99e Initial load duke parents: diff changeset	126 return _should_remember_klasses;
a61af66fc99e Initial load duke parents: diff changeset	127 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	128 virtual void remember_klass(Klass* k);
0 a61af66fc99e Initial load duke parents: diff changeset	129 };
a61af66fc99e Initial load duke parents: diff changeset	130
a61af66fc99e Initial load duke parents: diff changeset	131 // In the parallel case, the revisit stack, the bit map and the
a61af66fc99e Initial load duke parents: diff changeset	132 // reference processor are currently all shared. Access to
a61af66fc99e Initial load duke parents: diff changeset	133 // these shared mutable structures must use appropriate
a61af66fc99e Initial load duke parents: diff changeset	134 // synchronization (for instance, via CAS). The marking stack
a61af66fc99e Initial load duke parents: diff changeset	135 // used in the non-parallel case above is here replaced with
a61af66fc99e Initial load duke parents: diff changeset	136 // an OopTaskQueue structure to allow efficient work stealing.
a61af66fc99e Initial load duke parents: diff changeset	137 class Par_PushAndMarkClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	138 private:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	139 CMSCollector* _collector;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	140 MemRegion _span;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	141 CMSBitMap* _bit_map;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	142 OopTaskQueue* _work_queue;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	143 CMSMarkStack* _revisit_stack;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	144 bool const _should_remember_klasses;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	145 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	146 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	147 public:
a61af66fc99e Initial load duke parents: diff changeset	148 Par_PushAndMarkClosure(CMSCollector* collector,
a61af66fc99e Initial load duke parents: diff changeset	149 MemRegion span,
a61af66fc99e Initial load duke parents: diff changeset	150 ReferenceProcessor* rp,
a61af66fc99e Initial load duke parents: diff changeset	151 CMSBitMap* bit_map,
a61af66fc99e Initial load duke parents: diff changeset	152 OopTaskQueue* work_queue,
a61af66fc99e Initial load duke parents: diff changeset	153 CMSMarkStack* revisit_stack);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	154 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	155 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	156 inline void do_oop_nv(oop* p) { Par_PushAndMarkClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	157 inline void do_oop_nv(narrowOop* p) { Par_PushAndMarkClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	158 bool do_header() { return true; }
a61af66fc99e Initial load duke parents: diff changeset	159 Prefetch::style prefetch_style() {
a61af66fc99e Initial load duke parents: diff changeset	160 return Prefetch::do_read;
a61af66fc99e Initial load duke parents: diff changeset	161 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	162 virtual const bool should_remember_klasses() const {
0 a61af66fc99e Initial load duke parents: diff changeset	163 return _should_remember_klasses;
a61af66fc99e Initial load duke parents: diff changeset	164 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	165 virtual void remember_klass(Klass* k);
0 a61af66fc99e Initial load duke parents: diff changeset	166 };
a61af66fc99e Initial load duke parents: diff changeset	167
a61af66fc99e Initial load duke parents: diff changeset	168 // The non-parallel version (the parallel version appears further below).
a61af66fc99e Initial load duke parents: diff changeset	169 class MarkRefsIntoAndScanClosure: public OopsInGenClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	170 private:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	171 MemRegion _span;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	172 CMSBitMap* _bit_map;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	173 CMSMarkStack* _mark_stack;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	174 PushAndMarkClosure _pushAndMarkClosure;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	175 CMSCollector* _collector;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	176 Mutex* _freelistLock;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	177 bool _yield;
0 a61af66fc99e Initial load duke parents: diff changeset	178 // Whether closure is being used for concurrent precleaning
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	179 bool _concurrent_precleaning;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	180 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	181 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	182 public:
a61af66fc99e Initial load duke parents: diff changeset	183 MarkRefsIntoAndScanClosure(MemRegion span,
a61af66fc99e Initial load duke parents: diff changeset	184 ReferenceProcessor* rp,
a61af66fc99e Initial load duke parents: diff changeset	185 CMSBitMap* bit_map,
a61af66fc99e Initial load duke parents: diff changeset	186 CMSBitMap* mod_union_table,
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	187 CMSMarkStack* mark_stack,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	188 CMSMarkStack* revisit_stack,
0 a61af66fc99e Initial load duke parents: diff changeset	189 CMSCollector* collector,
a61af66fc99e Initial load duke parents: diff changeset	190 bool should_yield,
a61af66fc99e Initial load duke parents: diff changeset	191 bool concurrent_precleaning);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	192 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	193 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	194 inline void do_oop_nv(oop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	195 inline void do_oop_nv(narrowOop* p) { MarkRefsIntoAndScanClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	196 bool do_header() { return true; }
a61af66fc99e Initial load duke parents: diff changeset	197 virtual const bool do_nmethods() const { return true; }
a61af66fc99e Initial load duke parents: diff changeset	198 Prefetch::style prefetch_style() {
a61af66fc99e Initial load duke parents: diff changeset	199 return Prefetch::do_read;
a61af66fc99e Initial load duke parents: diff changeset	200 }
a61af66fc99e Initial load duke parents: diff changeset	201 void set_freelistLock(Mutex* m) {
a61af66fc99e Initial load duke parents: diff changeset	202 _freelistLock = m;
a61af66fc99e Initial load duke parents: diff changeset	203 }
a61af66fc99e Initial load duke parents: diff changeset	204
a61af66fc99e Initial load duke parents: diff changeset	205 private:
a61af66fc99e Initial load duke parents: diff changeset	206 inline void do_yield_check();
a61af66fc99e Initial load duke parents: diff changeset	207 void do_yield_work();
a61af66fc99e Initial load duke parents: diff changeset	208 bool take_from_overflow_list();
a61af66fc99e Initial load duke parents: diff changeset	209 };
a61af66fc99e Initial load duke parents: diff changeset	210
a61af66fc99e Initial load duke parents: diff changeset	211 // Tn this, the parallel avatar of MarkRefsIntoAndScanClosure, the revisit
a61af66fc99e Initial load duke parents: diff changeset	212 // stack and the bitMap are shared, so access needs to be suitably
a61af66fc99e Initial load duke parents: diff changeset	213 // sycnhronized. An OopTaskQueue structure, supporting efficient
a61af66fc99e Initial load duke parents: diff changeset	214 // workstealing, replaces a CMSMarkStack for storing grey objects.
a61af66fc99e Initial load duke parents: diff changeset	215 class Par_MarkRefsIntoAndScanClosure: public OopsInGenClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	216 private:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	217 MemRegion _span;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	218 CMSBitMap* _bit_map;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	219 OopTaskQueue* _work_queue;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	220 const uint _low_water_mark;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	221 Par_PushAndMarkClosure _par_pushAndMarkClosure;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	222 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	223 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	224 public:
a61af66fc99e Initial load duke parents: diff changeset	225 Par_MarkRefsIntoAndScanClosure(CMSCollector* collector,
a61af66fc99e Initial load duke parents: diff changeset	226 MemRegion span,
a61af66fc99e Initial load duke parents: diff changeset	227 ReferenceProcessor* rp,
a61af66fc99e Initial load duke parents: diff changeset	228 CMSBitMap* bit_map,
a61af66fc99e Initial load duke parents: diff changeset	229 OopTaskQueue* work_queue,
a61af66fc99e Initial load duke parents: diff changeset	230 CMSMarkStack* revisit_stack);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	231 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	232 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	233 inline void do_oop_nv(oop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	234 inline void do_oop_nv(narrowOop* p) { Par_MarkRefsIntoAndScanClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	235 bool do_header() { return true; }
a61af66fc99e Initial load duke parents: diff changeset	236 virtual const bool do_nmethods() const { return true; }
a61af66fc99e Initial load duke parents: diff changeset	237 Prefetch::style prefetch_style() {
a61af66fc99e Initial load duke parents: diff changeset	238 return Prefetch::do_read;
a61af66fc99e Initial load duke parents: diff changeset	239 }
a61af66fc99e Initial load duke parents: diff changeset	240 void trim_queue(uint size);
a61af66fc99e Initial load duke parents: diff changeset	241 };
a61af66fc99e Initial load duke parents: diff changeset	242
a61af66fc99e Initial load duke parents: diff changeset	243 // This closure is used during the concurrent marking phase
a61af66fc99e Initial load duke parents: diff changeset	244 // following the first checkpoint. Its use is buried in
a61af66fc99e Initial load duke parents: diff changeset	245 // the closure MarkFromRootsClosure.
a61af66fc99e Initial load duke parents: diff changeset	246 class PushOrMarkClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	247 private:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	248 CMSCollector* _collector;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	249 MemRegion _span;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	250 CMSBitMap* _bitMap;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	251 CMSMarkStack* _markStack;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	252 CMSMarkStack* _revisitStack;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	253 HeapWord* const _finger;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	254 MarkFromRootsClosure* const
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	255 _parent;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	256 bool const _should_remember_klasses;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	257 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	258 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	259 public:
a61af66fc99e Initial load duke parents: diff changeset	260 PushOrMarkClosure(CMSCollector* cms_collector,
a61af66fc99e Initial load duke parents: diff changeset	261 MemRegion span,
a61af66fc99e Initial load duke parents: diff changeset	262 CMSBitMap* bitMap,
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	263 CMSMarkStack* markStack,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	264 CMSMarkStack* revisitStack,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	265 HeapWord* finger,
0 a61af66fc99e Initial load duke parents: diff changeset	266 MarkFromRootsClosure* parent);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	267 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	268 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	269 inline void do_oop_nv(oop* p) { PushOrMarkClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	270 inline void do_oop_nv(narrowOop* p) { PushOrMarkClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	271 virtual const bool should_remember_klasses() const {
0 a61af66fc99e Initial load duke parents: diff changeset	272 return _should_remember_klasses;
a61af66fc99e Initial load duke parents: diff changeset	273 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	274 virtual void remember_klass(Klass* k);
0 a61af66fc99e Initial load duke parents: diff changeset	275 // Deal with a stack overflow condition
a61af66fc99e Initial load duke parents: diff changeset	276 void handle_stack_overflow(HeapWord* lost);
a61af66fc99e Initial load duke parents: diff changeset	277 private:
a61af66fc99e Initial load duke parents: diff changeset	278 inline void do_yield_check();
a61af66fc99e Initial load duke parents: diff changeset	279 };
a61af66fc99e Initial load duke parents: diff changeset	280
a61af66fc99e Initial load duke parents: diff changeset	281 // A parallel (MT) version of the above.
a61af66fc99e Initial load duke parents: diff changeset	282 // This closure is used during the concurrent marking phase
a61af66fc99e Initial load duke parents: diff changeset	283 // following the first checkpoint. Its use is buried in
a61af66fc99e Initial load duke parents: diff changeset	284 // the closure Par_MarkFromRootsClosure.
a61af66fc99e Initial load duke parents: diff changeset	285 class Par_PushOrMarkClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	286 private:
0 a61af66fc99e Initial load duke parents: diff changeset	287 CMSCollector* _collector;
a61af66fc99e Initial load duke parents: diff changeset	288 MemRegion _whole_span;
a61af66fc99e Initial load duke parents: diff changeset	289 MemRegion _span; // local chunk
a61af66fc99e Initial load duke parents: diff changeset	290 CMSBitMap* _bit_map;
a61af66fc99e Initial load duke parents: diff changeset	291 OopTaskQueue* _work_queue;
a61af66fc99e Initial load duke parents: diff changeset	292 CMSMarkStack* _overflow_stack;
a61af66fc99e Initial load duke parents: diff changeset	293 CMSMarkStack* _revisit_stack;
a61af66fc99e Initial load duke parents: diff changeset	294 HeapWord* const _finger;
a61af66fc99e Initial load duke parents: diff changeset	295 HeapWord** const _global_finger_addr;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	296 Par_MarkFromRootsClosure* const
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	297 _parent;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	298 bool const _should_remember_klasses;
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	299 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	300 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	301 public:
a61af66fc99e Initial load duke parents: diff changeset	302 Par_PushOrMarkClosure(CMSCollector* cms_collector,
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	303 MemRegion span,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	304 CMSBitMap* bit_map,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	305 OopTaskQueue* work_queue,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	306 CMSMarkStack* mark_stack,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	307 CMSMarkStack* revisit_stack,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	308 HeapWord* finger,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	309 HeapWord** global_finger_addr,
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	310 Par_MarkFromRootsClosure* parent);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	311 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	312 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	313 inline void do_oop_nv(oop* p) { Par_PushOrMarkClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	314 inline void do_oop_nv(narrowOop* p) { Par_PushOrMarkClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	315 virtual const bool should_remember_klasses() const {
0 a61af66fc99e Initial load duke parents: diff changeset	316 return _should_remember_klasses;
a61af66fc99e Initial load duke parents: diff changeset	317 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	318 virtual void remember_klass(Klass* k);
0 a61af66fc99e Initial load duke parents: diff changeset	319 // Deal with a stack overflow condition
a61af66fc99e Initial load duke parents: diff changeset	320 void handle_stack_overflow(HeapWord* lost);
a61af66fc99e Initial load duke parents: diff changeset	321 private:
a61af66fc99e Initial load duke parents: diff changeset	322 inline void do_yield_check();
a61af66fc99e Initial load duke parents: diff changeset	323 };
a61af66fc99e Initial load duke parents: diff changeset	324
a61af66fc99e Initial load duke parents: diff changeset	325 // For objects in CMS generation, this closure marks
a61af66fc99e Initial load duke parents: diff changeset	326 // given objects (transitively) as being reachable/live.
a61af66fc99e Initial load duke parents: diff changeset	327 // This is currently used during the (weak) reference object
a61af66fc99e Initial load duke parents: diff changeset	328 // processing phase of the CMS final checkpoint step.
a61af66fc99e Initial load duke parents: diff changeset	329 class CMSKeepAliveClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	330 private:
0 a61af66fc99e Initial load duke parents: diff changeset	331 CMSCollector* _collector;
143 b5489bb705c9 6662086: 6u4+, 7b11+: CMS never clears referents when -XX:+ParallelRefProcEnabled ysr parents: 113 diff changeset	332 const MemRegion _span;
0 a61af66fc99e Initial load duke parents: diff changeset	333 CMSMarkStack* _mark_stack;
a61af66fc99e Initial load duke parents: diff changeset	334 CMSBitMap* _bit_map;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	335 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	336 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	337 public:
a61af66fc99e Initial load duke parents: diff changeset	338 CMSKeepAliveClosure(CMSCollector* collector, MemRegion span,
a61af66fc99e Initial load duke parents: diff changeset	339 CMSBitMap* bit_map, CMSMarkStack* mark_stack):
a61af66fc99e Initial load duke parents: diff changeset	340 _collector(collector),
a61af66fc99e Initial load duke parents: diff changeset	341 _span(span),
a61af66fc99e Initial load duke parents: diff changeset	342 _bit_map(bit_map),
143 b5489bb705c9 6662086: 6u4+, 7b11+: CMS never clears referents when -XX:+ParallelRefProcEnabled ysr parents: 113 diff changeset	343 _mark_stack(mark_stack) {
b5489bb705c9 6662086: 6u4+, 7b11+: CMS never clears referents when -XX:+ParallelRefProcEnabled ysr parents: 113 diff changeset	344 assert(!_span.is_empty(), "Empty span could spell trouble");
b5489bb705c9 6662086: 6u4+, 7b11+: CMS never clears referents when -XX:+ParallelRefProcEnabled ysr parents: 113 diff changeset	345 }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	346 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	347 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	348 inline void do_oop_nv(oop* p) { CMSKeepAliveClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	349 inline void do_oop_nv(narrowOop* p) { CMSKeepAliveClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	350 };
a61af66fc99e Initial load duke parents: diff changeset	351
a61af66fc99e Initial load duke parents: diff changeset	352 class CMSInnerParMarkAndPushClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	353 private:
0 a61af66fc99e Initial load duke parents: diff changeset	354 CMSCollector* _collector;
a61af66fc99e Initial load duke parents: diff changeset	355 MemRegion _span;
a61af66fc99e Initial load duke parents: diff changeset	356 OopTaskQueue* _work_queue;
a61af66fc99e Initial load duke parents: diff changeset	357 CMSBitMap* _bit_map;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	358 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	359 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	360 public:
a61af66fc99e Initial load duke parents: diff changeset	361 CMSInnerParMarkAndPushClosure(CMSCollector* collector,
a61af66fc99e Initial load duke parents: diff changeset	362 MemRegion span, CMSBitMap* bit_map,
a61af66fc99e Initial load duke parents: diff changeset	363 OopTaskQueue* work_queue):
a61af66fc99e Initial load duke parents: diff changeset	364 _collector(collector),
a61af66fc99e Initial load duke parents: diff changeset	365 _span(span),
a61af66fc99e Initial load duke parents: diff changeset	366 _bit_map(bit_map),
a61af66fc99e Initial load duke parents: diff changeset	367 _work_queue(work_queue) { }
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	368 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	369 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	370 inline void do_oop_nv(oop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	371 inline void do_oop_nv(narrowOop* p) { CMSInnerParMarkAndPushClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	372 };
a61af66fc99e Initial load duke parents: diff changeset	373
a61af66fc99e Initial load duke parents: diff changeset	374 // A parallel (MT) version of the above, used when
a61af66fc99e Initial load duke parents: diff changeset	375 // reference processing is parallel; the only difference
a61af66fc99e Initial load duke parents: diff changeset	376 // is in the do_oop method.
a61af66fc99e Initial load duke parents: diff changeset	377 class CMSParKeepAliveClosure: public OopClosure {
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	378 private:
0 a61af66fc99e Initial load duke parents: diff changeset	379 CMSCollector* _collector;
a61af66fc99e Initial load duke parents: diff changeset	380 MemRegion _span;
a61af66fc99e Initial load duke parents: diff changeset	381 OopTaskQueue* _work_queue;
a61af66fc99e Initial load duke parents: diff changeset	382 CMSBitMap* _bit_map;
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	383 CMSInnerParMarkAndPushClosure
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	384 _mark_and_push;
0 a61af66fc99e Initial load duke parents: diff changeset	385 const uint _low_water_mark;
a61af66fc99e Initial load duke parents: diff changeset	386 void trim_queue(uint max);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	387 protected:
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	388 DO_OOP_WORK_DEFN
0 a61af66fc99e Initial load duke parents: diff changeset	389 public:
a61af66fc99e Initial load duke parents: diff changeset	390 CMSParKeepAliveClosure(CMSCollector* collector, MemRegion span,
a61af66fc99e Initial load duke parents: diff changeset	391 CMSBitMap* bit_map, OopTaskQueue* work_queue);
113 ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	392 virtual void do_oop(oop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	393 virtual void do_oop(narrowOop* p);
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	394 inline void do_oop_nv(oop* p) { CMSParKeepAliveClosure::do_oop_work(p); }
ba764ed4b6f2 6420645: Create a vm that uses compressed oops for up to 32gb heapsizes coleenp parents: 0 diff changeset	395 inline void do_oop_nv(narrowOop* p) { CMSParKeepAliveClosure::do_oop_work(p); }
0 a61af66fc99e Initial load duke parents: diff changeset	396 };

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsOopClosures.hpp @ 143:b5489bb705c9