Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/shared/markSweep.inline.hpp @ 266:2214b226b7f0
6724367: par compact could clear less young gen summary data
Reviewed-by: jmasa, apetrusenko
author | jcoomes |
---|---|
date | Fri, 11 Jul 2008 16:11:50 -0700 |
parents | ba764ed4b6f2 |
children | d1605aabd0a1 |
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/* * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ inline void MarkSweep::mark_object(oop obj) { #ifndef SERIALGC if (UseParallelOldGC && VerifyParallelOldWithMarkSweep) { assert(PSParallelCompact::mark_bitmap()->is_marked(obj), "Should be marked in the marking bitmap"); } #endif // SERIALGC // some marks may contain information we need to preserve so we store them away // and overwrite the mark. We'll restore it at the end of markSweep. markOop mark = obj->mark(); obj->set_mark(markOopDesc::prototype()->set_marked()); if (mark->must_be_preserved(obj)) { preserve_mark(obj, mark); } } template <class T> inline void MarkSweep::follow_root(T* p) { assert(!Universe::heap()->is_in_reserved(p), "roots shouldn't be things within the heap"); #ifdef VALIDATE_MARK_SWEEP if (ValidateMarkSweep) { guarantee(!_root_refs_stack->contains(p), "should only be in here once"); _root_refs_stack->push(p); } #endif T heap_oop = oopDesc::load_heap_oop(p); if (!oopDesc::is_null(heap_oop)) { oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); if (!obj->mark()->is_marked()) { mark_object(obj); obj->follow_contents(); } } follow_stack(); } template <class T> inline void MarkSweep::mark_and_follow(T* p) { // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); T heap_oop = oopDesc::load_heap_oop(p); if (!oopDesc::is_null(heap_oop)) { oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); if (!obj->mark()->is_marked()) { mark_object(obj); obj->follow_contents(); } } } template <class T> inline void MarkSweep::mark_and_push(T* p) { // assert(Universe::heap()->is_in_reserved(p), "should be in object space"); T heap_oop = oopDesc::load_heap_oop(p); if (!oopDesc::is_null(heap_oop)) { oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); if (!obj->mark()->is_marked()) { mark_object(obj); _marking_stack->push(obj); } } } template <class T> inline void MarkSweep::adjust_pointer(T* p, bool isroot) { T heap_oop = oopDesc::load_heap_oop(p); if (!oopDesc::is_null(heap_oop)) { oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); oop new_obj = oop(obj->mark()->decode_pointer()); assert(new_obj != NULL || // is forwarding ptr? obj->mark() == markOopDesc::prototype() || // not gc marked? (UseBiasedLocking && obj->mark()->has_bias_pattern()) || // not gc marked? obj->is_shared(), // never forwarded? "should be forwarded"); if (new_obj != NULL) { assert(Universe::heap()->is_in_reserved(new_obj), "should be in object space"); oopDesc::encode_store_heap_oop_not_null(p, new_obj); } } VALIDATE_MARK_SWEEP_ONLY(track_adjusted_pointer(p, isroot)); } template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) { #ifdef VALIDATE_MARK_SWEEP if (ValidateMarkSweep) { if (!Universe::heap()->is_in_reserved(p)) { _root_refs_stack->push(p); } else { _other_refs_stack->push(p); } } #endif mark_and_push(p); }