147 lines
4.8 KiB
C++
147 lines
4.8 KiB
C++
/*
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* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP
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#define SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP
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#include "gc/serial/markSweep.hpp"
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#include "gc/shared/collectedHeap.hpp"
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#include "oops/instanceClassLoaderKlass.inline.hpp"
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#include "oops/instanceKlass.inline.hpp"
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#include "oops/instanceMirrorKlass.inline.hpp"
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#include "oops/instanceRefKlass.inline.hpp"
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#include "oops/markOop.inline.hpp"
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#include "oops/objArrayKlass.inline.hpp"
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#include "utilities/macros.hpp"
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#include "utilities/stack.inline.hpp"
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#if INCLUDE_ALL_GCS
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#include "gc/g1/g1StringDedup.hpp"
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#include "gc/g1/g1MarkSweep.hpp"
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#endif // INCLUDE_ALL_GCS
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inline void MarkSweep::mark_object(oop obj) {
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#if INCLUDE_ALL_GCS
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if (G1StringDedup::is_enabled()) {
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// We must enqueue the object before it is marked
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// as we otherwise can't read the object's age.
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G1StringDedup::enqueue_from_mark(obj);
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}
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#endif
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// some marks may contain information we need to preserve so we store them away
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// and overwrite the mark. We'll restore it at the end of markSweep.
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markOop mark = obj->mark();
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obj->set_mark(markOopDesc::prototype()->set_marked());
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if (mark->must_be_preserved(obj)) {
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preserve_mark(obj, mark);
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}
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}
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inline bool MarkSweep::is_archive_object(oop object) {
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#if INCLUDE_ALL_GCS
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return (G1MarkSweep::archive_check_enabled() &&
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G1MarkSweep::in_archive_range(object));
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#else
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return false;
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#endif
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}
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inline void MarkSweep::follow_klass(Klass* klass) {
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oop op = klass->klass_holder();
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MarkSweep::mark_and_push(&op);
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}
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inline void MarkSweep::follow_object(oop obj) {
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assert(obj->is_gc_marked(), "should be marked");
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obj->ms_follow_contents();
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}
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template <class T> inline void MarkSweep::follow_root(T* p) {
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assert(!Universe::heap()->is_in_reserved(p),
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"roots shouldn't be things within the heap");
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T heap_oop = oopDesc::load_heap_oop(p);
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if (!oopDesc::is_null(heap_oop)) {
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oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
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if (!obj->mark()->is_marked() &&
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!is_archive_object(obj)) {
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mark_object(obj);
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follow_object(obj);
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}
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}
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follow_stack();
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}
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template <class T> inline void MarkSweep::mark_and_push(T* p) {
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// assert(Universe::heap()->is_in_reserved(p), "should be in object space");
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T heap_oop = oopDesc::load_heap_oop(p);
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if (!oopDesc::is_null(heap_oop)) {
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oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
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if (!obj->mark()->is_marked() &&
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!is_archive_object(obj)) {
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mark_object(obj);
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_marking_stack.push(obj);
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}
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}
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}
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void MarkSweep::push_objarray(oop obj, size_t index) {
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ObjArrayTask task(obj, index);
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assert(task.is_valid(), "bad ObjArrayTask");
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_objarray_stack.push(task);
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}
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inline int MarkSweep::adjust_pointers(oop obj) {
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return obj->ms_adjust_pointers();
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}
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template <class T> inline void MarkSweep::adjust_pointer(T* p) {
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T heap_oop = oopDesc::load_heap_oop(p);
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if (!oopDesc::is_null(heap_oop)) {
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oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
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assert(Universe::heap()->is_in(obj), "should be in heap");
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oop new_obj = oop(obj->mark()->decode_pointer());
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assert(is_archive_object(obj) || // no forwarding of archive objects
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new_obj != NULL || // is forwarding ptr?
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obj->mark() == markOopDesc::prototype() || // not gc marked?
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(UseBiasedLocking && obj->mark()->has_bias_pattern()),
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// not gc marked?
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"should be forwarded");
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if (new_obj != NULL) {
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if (!is_archive_object(obj)) {
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assert(Universe::heap()->is_in_reserved(new_obj),
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"should be in object space");
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oopDesc::encode_store_heap_oop_not_null(p, new_obj);
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}
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}
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}
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}
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template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) {
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mark_and_push(p);
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}
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#endif // SHARE_VM_GC_SERIAL_MARKSWEEP_INLINE_HPP
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