truffle: src/share/vm/gc_implementation/g1/g1MarkSweep.cpp annotate

annotate src/share/vm/gc_implementation/g1/g1MarkSweep.cpp @ 8733:9def4075da6d

8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate(). Reviewed-by: johnc, ysr Contributed-by: tamao <tao.mao@oracle.com>

author	tamao
date	Tue, 05 Mar 2013 15:36:56 -0800
parents	b735136e0d82
children	a08c80e9e1e5

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
4872 aa3d708d67c4 7141200: log some interesting information in ring buffers for crashes never parents: 4072 diff changeset	2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	26 #include "classfile/javaClasses.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	27 #include "classfile/symbolTable.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	28 #include "classfile/systemDictionary.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	29 #include "classfile/vmSymbols.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	30 #include "code/codeCache.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	31 #include "code/icBuffer.hpp"
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 4872 diff changeset	32 #include "gc_implementation/g1/g1Log.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	33 #include "gc_implementation/g1/g1MarkSweep.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	34 #include "memory/gcLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	35 #include "memory/genCollectedHeap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	36 #include "memory/modRefBarrierSet.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	37 #include "memory/referencePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	38 #include "memory/space.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	39 #include "oops/instanceRefKlass.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	40 #include "oops/oop.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	41 #include "prims/jvmtiExport.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	42 #include "runtime/aprofiler.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	43 #include "runtime/biasedLocking.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	44 #include "runtime/fprofiler.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	45 #include "runtime/synchronizer.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	46 #include "runtime/thread.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	47 #include "runtime/vmThread.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	48 #include "utilities/copy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1836 diff changeset	49 #include "utilities/events.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	50
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	51 class HeapRegion;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	52
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	53 void G1MarkSweep::invoke_at_safepoint(ReferenceProcessor* rp,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	54 bool clear_all_softrefs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	55 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	56
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	57 SharedHeap* sh = SharedHeap::heap();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	58 #ifdef ASSERT
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	59 if (sh->collector_policy()->should_clear_all_soft_refs()) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	60 assert(clear_all_softrefs, "Policy should have been checked earler");
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	61 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1311 diff changeset	62 #endif
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	63 // hook up weak ref data so it can be used during Mark-Sweep
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	64 assert(GenMarkSweep::ref_processor() == NULL, "no stomping");
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 358 diff changeset	65 assert(rp != NULL, "should be non-NULL");
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3772 diff changeset	66 assert(rp == G1CollectedHeap::heap()->ref_processor_stw(), "Precondition");
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3772 diff changeset	67
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	68 GenMarkSweep::_ref_processor = rp;
457 27a80744a83b 6778647: snap(), snap_policy() should be renamed setup(), setup_policy() ysr parents: 453 diff changeset	69 rp->setup_policy(clear_all_softrefs);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	70
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	71 // When collecting the permanent generation Method*s may be moving,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	72 // so we either have to flush all bcp data or convert it into bci.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	73 CodeCache::gc_prologue();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	74 Threads::gc_prologue();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	75
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	76 bool marked_for_unloading = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	77
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	78 allocate_stacks();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	79
358 8651a65ac4b4 6735416: G1: runThese javasoft.sqe.tests.lang.thrd011.thrd01101.thrd01101 fails iveresov parents: 342 diff changeset	80 // We should save the marks of the currently locked biased monitors.
8651a65ac4b4 6735416: G1: runThese javasoft.sqe.tests.lang.thrd011.thrd01101.thrd01101 fails iveresov parents: 342 diff changeset	81 // The marking doesn't preserve the marks of biased objects.
8651a65ac4b4 6735416: G1: runThese javasoft.sqe.tests.lang.thrd011.thrd01101.thrd01101 fails iveresov parents: 342 diff changeset	82 BiasedLocking::preserve_marks();
8651a65ac4b4 6735416: G1: runThese javasoft.sqe.tests.lang.thrd011.thrd01101.thrd01101 fails iveresov parents: 342 diff changeset	83
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	84 mark_sweep_phase1(marked_for_unloading, clear_all_softrefs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	85
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	86 mark_sweep_phase2();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	87
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	88 // Don't add any more derived pointers during phase3
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	89 COMPILER2_PRESENT(DerivedPointerTable::set_active(false));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	90
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	91 mark_sweep_phase3();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	92
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	93 mark_sweep_phase4();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	94
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	95 GenMarkSweep::restore_marks();
358 8651a65ac4b4 6735416: G1: runThese javasoft.sqe.tests.lang.thrd011.thrd01101.thrd01101 fails iveresov parents: 342 diff changeset	96 BiasedLocking::restore_marks();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	97 GenMarkSweep::deallocate_stacks();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	98
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	99 // "free at last gc" is calculated from these.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	100 // CHF: cheating for now!!!
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	101 // Universe::set_heap_capacity_at_last_gc(Universe::heap()->capacity());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	102 // Universe::set_heap_used_at_last_gc(Universe::heap()->used());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	103
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	104 Threads::gc_epilogue();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	105 CodeCache::gc_epilogue();
2147 9afee0b9fc1d 7012505: BreakpointWithFullGC.sh fails with Internal Error (src/share/vm/oops/methodOop.cpp:220) kamg parents: 1972 diff changeset	106 JvmtiExport::gc_epilogue();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	107
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	108 // refs processing: clean slate
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	109 GenMarkSweep::_ref_processor = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	110 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	111
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	112
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	113 void G1MarkSweep::allocate_stacks() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	114 GenMarkSweep::_preserved_count_max = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	115 GenMarkSweep::_preserved_marks = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	116 GenMarkSweep::_preserved_count = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	117 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	118
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	119 void G1MarkSweep::mark_sweep_phase1(bool& marked_for_unloading,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	120 bool clear_all_softrefs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	121 // Recursively traverse all live objects and mark them
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 4872 diff changeset	122 TraceTime tm("phase 1", G1Log::fine() && Verbose, true, gclog_or_tty);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	123 GenMarkSweep::trace(" 1");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	124
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	125 SharedHeap* sh = SharedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	126
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	127 // Need cleared claim bits for the strong roots processing
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	128 ClassLoaderDataGraph::clear_claimed_marks();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	129
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	130 sh->process_strong_roots(true, // activate StrongRootsScope
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	131 false, // not scavenging.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	132 SharedHeap::SO_SystemClasses,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	133 &GenMarkSweep::follow_root_closure,
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 844 diff changeset	134 &GenMarkSweep::follow_code_root_closure,
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	135 &GenMarkSweep::follow_klass_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	136
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	137 // Process reference objects found during marking
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 358 diff changeset	138 ReferenceProcessor* rp = GenMarkSweep::ref_processor();
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3772 diff changeset	139 assert(rp == G1CollectedHeap::heap()->ref_processor_stw(), "Sanity");
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3772 diff changeset	140
457 27a80744a83b 6778647: snap(), snap_policy() should be renamed setup(), setup_policy() ysr parents: 453 diff changeset	141 rp->setup_policy(clear_all_softrefs);
453 c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 358 diff changeset	142 rp->process_discovered_references(&GenMarkSweep::is_alive,
c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 358 diff changeset	143 &GenMarkSweep::keep_alive,
c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 358 diff changeset	144 &GenMarkSweep::follow_stack_closure,
c96030fff130 6684579: SoftReference processing can be made more efficient ysr parents: 358 diff changeset	145 NULL);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	146
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	147 // Follow system dictionary roots and unload classes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	148 bool purged_class = SystemDictionary::do_unloading(&GenMarkSweep::is_alive);
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1552 diff changeset	149 assert(GenMarkSweep::_marking_stack.is_empty(),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	150 "stack should be empty by now");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	151
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	152 // Follow code cache roots (has to be done after system dictionary,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	153 // assumes all live klasses are marked)
6787 8966c2d65d96 7200470: KeepAliveClosure not needed in CodeCache::do_unloading brutisso parents: 6725 diff changeset	154 CodeCache::do_unloading(&GenMarkSweep::is_alive, purged_class);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 844 diff changeset	155 GenMarkSweep::follow_stack();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 // Update subklass/sibling/implementor links of live klasses
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	158 Klass::clean_weak_klass_links(&GenMarkSweep::is_alive);
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1552 diff changeset	159 assert(GenMarkSweep::_marking_stack.is_empty(),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	160 "stack should be empty by now");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2153 diff changeset	162 // Visit interned string tables and delete unmarked oops
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	163 StringTable::unlink(&GenMarkSweep::is_alive);
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2153 diff changeset	164 // Clean up unreferenced symbols in symbol table.
3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 2153 diff changeset	165 SymbolTable::unlink();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166
1836 894b1d7c7e01 6423256: GC stacks should use a better data structure jcoomes parents: 1552 diff changeset	167 assert(GenMarkSweep::_marking_stack.is_empty(),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	168 "stack should be empty by now");
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	169
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	170 if (VerifyDuringGC) {
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	171 HandleMark hm; // handle scope
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	172 COMPILER2_PRESENT(DerivedPointerTableDeactivate dpt_deact);
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	173 gclog_or_tty->print(" VerifyDuringGC:(full)[Verifying ");
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	174 Universe::heap()->prepare_for_verify();
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	175 // Note: we can verify only the heap here. When an object is
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	176 // marked, the previous value of the mark word (including
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	177 // identity hash values, ages, etc) is preserved, and the mark
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	178 // word is set to markOop::marked_value - effectively removing
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	179 // any hash values from the mark word. These hash values are
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	180 // used when verifying the dictionaries and so removing them
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	181 // from the mark word can make verification of the dictionaries
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	182 // fail. At the end of the GC, the orginal mark word values
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	183 // (including hash values) are restored to the appropriate
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	184 // objects.
6008 b632e80fc9dc 4988100: oop_verify_old_oop appears to be dead brutisso parents: 6007 diff changeset	185 Universe::heap()->verify(/* silent */ false,
3772 6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	186 /* option */ VerifyOption_G1UseMarkWord);
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	187
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	188 G1CollectedHeap* g1h = G1CollectedHeap::heap();
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	189 gclog_or_tty->print_cr("]");
6747fd0512e0 7004681: G1: Extend marking verification to Full GCs johnc parents: 2361 diff changeset	190 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	191 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	192
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	193 class G1PrepareCompactClosure: public HeapRegionClosure {
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	194 G1CollectedHeap* _g1h;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	195 ModRefBarrierSet* _mrbs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	196 CompactPoint _cp;
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	197 HumongousRegionSet _humongous_proxy_set;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	198
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	199 void free_humongous_region(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	200 HeapWord* end = hr->end();
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	201 size_t dummy_pre_used;
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	202 FreeRegionList dummy_free_list("Dummy Free List for G1MarkSweep");
1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	203
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	204 assert(hr->startsHumongous(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	205 "Only the start of a humongous region should be freed.");
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	206 _g1h->free_humongous_region(hr, &dummy_pre_used, &dummy_free_list,
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	207 &_humongous_proxy_set, false /* par */);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	208 hr->prepare_for_compaction(&_cp);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	209 // Also clear the part of the card table that will be unused after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	210 // compaction.
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	211 _mrbs->clear(MemRegion(hr->compaction_top(), end));
2361 1216415d8e35 7014923: G1: code cleanup tonyp parents: 2177 diff changeset	212 dummy_free_list.remove_all();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	213 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	214
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	215 public:
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	216 G1PrepareCompactClosure(CompactibleSpace* cs)
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	217 : _g1h(G1CollectedHeap::heap()),
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	218 _mrbs(G1CollectedHeap::heap()->mr_bs()),
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	219 _cp(NULL, cs, cs->initialize_threshold()),
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	220 _humongous_proxy_set("G1MarkSweep Humongous Proxy Set") { }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	221
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	222 void update_sets() {
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	223 // We'll recalculate total used bytes and recreate the free list
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	224 // at the end of the GC, so no point in updating those values here.
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	225 _g1h->update_sets_after_freeing_regions(0, /* pre_used */
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	226 NULL, /* free_list */
4072 8aae2050e83e 7092309: G1: introduce old region set tonyp parents: 3979 diff changeset	227 NULL, /* old_proxy_set */
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	228 &_humongous_proxy_set,
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	229 false /* par */);
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	230 }
0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	231
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	232 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	233 if (hr->isHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	234 if (hr->startsHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	235 oop obj = oop(hr->bottom());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	236 if (obj->is_gc_marked()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	237 obj->forward_to(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	238 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	239 free_humongous_region(hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	240 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	241 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	242 assert(hr->continuesHumongous(), "Invalid humongous.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	243 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	244 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	245 hr->prepare_for_compaction(&_cp);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	246 // Also clear the part of the card table that will be unused after
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	247 // compaction.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	248 _mrbs->clear(MemRegion(hr->compaction_top(), hr->end()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	249 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	250 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	251 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	252 };
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 470 diff changeset	253
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	254 void G1MarkSweep::mark_sweep_phase2() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	255 // Now all live objects are marked, compute the new object addresses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	256
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	257 // It is not required that we traverse spaces in the same order in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	258 // phase2, phase3 and phase4, but the ValidateMarkSweep live oops
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	259 // tracking expects us to do so. See comment under phase4.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	260
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	261 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	262
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 4872 diff changeset	263 TraceTime tm("phase 2", G1Log::fine() && Verbose, true, gclog_or_tty);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	264 GenMarkSweep::trace("2");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	265
6254 a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6008 diff changeset	266 // find the first region
a2f7274eb6ef 7114678: G1: various small fixes, code cleanup, and refactoring tonyp parents: 6008 diff changeset	267 HeapRegion* r = g1h->region_at(0);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	268 CompactibleSpace* sp = r;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	269 if (r->isHumongous() && oop(r->bottom())->is_gc_marked()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	270 sp = r->next_compaction_space();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	271 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272
677 96b229c54d1e 6543938: G1: remove the concept of popularity apetrusenko parents: 470 diff changeset	273 G1PrepareCompactClosure blk(sp);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	274 g1h->heap_region_iterate(&blk);
2152 0fa27f37d4d4 6977804: G1: remove the zero-filling thread tonyp parents: 1972 diff changeset	275 blk.update_sets();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	276 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	277
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	278 class G1AdjustPointersClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	279 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	280 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	281 if (r->isHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	282 if (r->startsHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	283 // We must adjust the pointers on the single H object.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284 oop obj = oop(r->bottom());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	285 // point all the oops to the new location
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	286 obj->adjust_pointers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	287 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	288 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	289 // This really ought to be "as_CompactibleSpace"...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 r->adjust_pointers();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	292 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	293 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	295
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	296 void G1MarkSweep::mark_sweep_phase3() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	299 // Adjust the pointers to reflect the new locations
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 4872 diff changeset	300 TraceTime tm("phase 3", G1Log::fine() && Verbose, true, gclog_or_tty);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	301 GenMarkSweep::trace("3");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	302
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	303 SharedHeap* sh = SharedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	304
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	305 // Need cleared claim bits for the strong roots processing
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	306 ClassLoaderDataGraph::clear_claimed_marks();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	307
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 844 diff changeset	308 sh->process_strong_roots(true, // activate StrongRootsScope
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	309 false, // not scavenging.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	310 SharedHeap::SO_AllClasses,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	311 &GenMarkSweep::adjust_root_pointer_closure,
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 844 diff changeset	312 NULL, // do not touch code cache here
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	313 &GenMarkSweep::adjust_klass_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3772 diff changeset	315 assert(GenMarkSweep::ref_processor() == g1h->ref_processor_stw(), "Sanity");
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 3772 diff changeset	316 g1h->ref_processor_stw()->weak_oops_do(&GenMarkSweep::adjust_root_pointer_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	317
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318 // Now adjust pointers in remaining weak roots. (All of which should
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	319 // have been cleared if they pointed to non-surviving objects.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 g1h->g1_process_weak_roots(&GenMarkSweep::adjust_root_pointer_closure,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321 &GenMarkSweep::adjust_pointer_closure);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	322
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323 GenMarkSweep::adjust_marks();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	324
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	325 G1AdjustPointersClosure blk;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	326 g1h->heap_region_iterate(&blk);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	327 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	328
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	329 class G1SpaceCompactClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	330 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331 G1SpaceCompactClosure() {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	332
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	333 bool doHeapRegion(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	334 if (hr->isHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	335 if (hr->startsHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	336 oop obj = oop(hr->bottom());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	337 if (obj->is_gc_marked()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	338 obj->init_mark();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	339 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	340 assert(hr->is_empty(), "Should have been cleared in phase 2.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	341 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	342 hr->reset_during_compaction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	343 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	344 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	345 hr->compact();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	346 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	347 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	348 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	349 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	350
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	351 void G1MarkSweep::mark_sweep_phase4() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	352 // All pointers are now adjusted, move objects accordingly
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	353
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	354 // The ValidateMarkSweep live oops tracking expects us to traverse spaces
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	355 // in the same order in phase2, phase3 and phase4. We don't quite do that
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6254 diff changeset	356 // here (code and comment not fixed for perm removal), so we tell the validate code
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	357 // to use a higher index (saved from phase2) when verifying perm_gen.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	358 G1CollectedHeap* g1h = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	359
6007 5c86f8211d1e 7160728: Introduce an extra logging level for G1 logging brutisso parents: 4872 diff changeset	360 TraceTime tm("phase 4", G1Log::fine() && Verbose, true, gclog_or_tty);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	361 GenMarkSweep::trace("4");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	362
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	363 G1SpaceCompactClosure blk;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	364 g1h->heap_region_iterate(&blk);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	365
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	366 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1MarkSweep.cpp @ 8733:9def4075da6d