Mercurial > hg > graal-jvmci-8
diff src/share/vm/oops/oop.pcgc.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/oops/oop.pcgc.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,122 @@ +/* + * Copyright 2005-2007 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 oopDesc::update_contents(ParCompactionManager* cm) { + // The klass field must be updated before anything else + // can be done. + DEBUG_ONLY(klassOopDesc* original_klass = klass()); + + // Can the option to update and/or copy be moved up in the + // call chain to avoid calling into here? + + if (PSParallelCompact::should_update_klass(klass())) { + update_header(); + assert(klass()->is_klass(), "Not updated correctly"); + } else { + assert(klass()->is_klass(), "Not updated"); + } + + Klass* new_klass = blueprint(); + if (!new_klass->oop_is_typeArray()) { + // It might contain oops beyond the header, so take the virtual call. + new_klass->oop_update_pointers(cm, this); + } + // Else skip it. The typeArrayKlass in the header never needs scavenging. +} + +inline void oopDesc::update_contents(ParCompactionManager* cm, + HeapWord* begin_limit, + HeapWord* end_limit) { + // The klass field must be updated before anything else + // can be done. + debug_only(klassOopDesc* original_klass = klass()); + + update_contents(cm, klass(), begin_limit, end_limit); +} + +inline void oopDesc::update_contents(ParCompactionManager* cm, + klassOop old_klass, + HeapWord* begin_limit, + HeapWord* end_limit) { + + klassOop updated_klass = + PSParallelCompact::summary_data().calc_new_klass(old_klass); + + // Needs to be boundary aware for the 64 bit case + // update_header(); + // The klass has moved. Is the location of the klass + // within the limits? + if ((((HeapWord*)&_klass) >= begin_limit) && + (((HeapWord*)&_klass) < end_limit)) { + set_klass(updated_klass); + } + + Klass* klass = updated_klass->klass_part(); + if (!klass->oop_is_typeArray()) { + // It might contain oops beyond the header, so take the virtual call. + klass->oop_update_pointers(cm, this, begin_limit, end_limit); + } + // Else skip it. The typeArrayKlass in the header never needs scavenging. +} + +inline void oopDesc::follow_contents(ParCompactionManager* cm) { + assert (PSParallelCompact::mark_bitmap()->is_marked(this), + "should be marked"); + blueprint()->oop_follow_contents(cm, this); +} + +// Used by parallel old GC. + +inline void oopDesc::follow_header(ParCompactionManager* cm) { + PSParallelCompact::mark_and_push(cm, (oop*)&_klass); +} + +inline oop oopDesc::forward_to_atomic(oop p) { + assert(ParNewGeneration::is_legal_forward_ptr(p), + "illegal forwarding pointer value."); + markOop oldMark = mark(); + markOop forwardPtrMark = markOopDesc::encode_pointer_as_mark(p); + markOop curMark; + + assert(forwardPtrMark->decode_pointer() == p, "encoding must be reversable"); + assert(sizeof(markOop) == sizeof(intptr_t), "CAS below requires this."); + + while (!is_forwarded()) { + curMark = (markOop)Atomic::cmpxchg_ptr(forwardPtrMark, &_mark, oldMark); + if (curMark == oldMark) { + assert(is_forwarded(), "the CAS should have succeeded."); + return NULL; + } + oldMark = curMark; + } + return forwardee(); +} + +inline void oopDesc::update_header() { + PSParallelCompact::adjust_pointer((oop*)&_klass); +} + +inline void oopDesc::update_header(HeapWord* beg_addr, HeapWord* end_addr) { + PSParallelCompact::adjust_pointer((oop*)&_klass, beg_addr, end_addr); +}