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src/share/vm/gc_implementation/shared/markSweep.inline.hpp@6aa440bc1125 (annotated)

src/share/vm/gc_implementation/shared/markSweep.inline.hpp

Wed, 12 Jun 2013 15:21:41 +0200

author

ehelin

date

Wed, 12 Jun 2013 15:21:41 +0200

changeset 5388

6aa440bc1125

parent 5011

a08c80e9e1e5

child 6148

55a0da3d420b

permissions

-rw-r--r--

8015683: object_count_after_gc should have the same timestamp for all events
Reviewed-by: mgerdin, stefank

duke@435	1	/*
coleenp@4037	2	* Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
stefank@2314	26	#define SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP
stefank@2314	27
stefank@2314	28	#include "gc_implementation/shared/markSweep.hpp"
stefank@2314	29	#include "gc_interface/collectedHeap.hpp"
stefank@2314	30	#include "utilities/stack.inline.hpp"
jprovino@4542	31	#include "utilities/macros.hpp"
jprovino@4542	32	#if INCLUDE_ALL_GCS
stefank@2314	33	#include "gc_implementation/parallelScavenge/psParallelCompact.hpp"
jprovino@4542	34	#endif // INCLUDE_ALL_GCS
stefank@2314	35
duke@435	36	inline void MarkSweep::mark_object(oop obj) {
duke@435	37	// some marks may contain information we need to preserve so we store them away
duke@435	38	// and overwrite the mark. We'll restore it at the end of markSweep.
duke@435	39	markOop mark = obj->mark();
duke@435	40	obj->set_mark(markOopDesc::prototype()->set_marked());
duke@435	41
duke@435	42	if (mark->must_be_preserved(obj)) {
duke@435	43	preserve_mark(obj, mark);
duke@435	44	}
duke@435	45	}
coleenp@548	46
coleenp@548	47	template <class T> inline void MarkSweep::follow_root(T* p) {
coleenp@548	48	assert(!Universe::heap()->is_in_reserved(p),
coleenp@548	49	"roots shouldn't be things within the heap");
coleenp@548	50	T heap_oop = oopDesc::load_heap_oop(p);
coleenp@548	51	if (!oopDesc::is_null(heap_oop)) {
coleenp@548	52	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
coleenp@548	53	if (!obj->mark()->is_marked()) {
coleenp@548	54	mark_object(obj);
coleenp@548	55	obj->follow_contents();
coleenp@548	56	}
coleenp@548	57	}
coleenp@548	58	follow_stack();
coleenp@548	59	}
coleenp@548	60
coleenp@548	61	template <class T> inline void MarkSweep::mark_and_push(T* p) {
coleenp@548	62	// assert(Universe::heap()->is_in_reserved(p), "should be in object space");
coleenp@548	63	T heap_oop = oopDesc::load_heap_oop(p);
coleenp@548	64	if (!oopDesc::is_null(heap_oop)) {
coleenp@548	65	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
coleenp@548	66	if (!obj->mark()->is_marked()) {
coleenp@548	67	mark_object(obj);
jcoomes@2191	68	_marking_stack.push(obj);
coleenp@548	69	}
coleenp@548	70	}
coleenp@548	71	}
coleenp@548	72
jcoomes@1746	73	void MarkSweep::push_objarray(oop obj, size_t index) {
jcoomes@1746	74	ObjArrayTask task(obj, index);
jcoomes@1746	75	assert(task.is_valid(), "bad ObjArrayTask");
jcoomes@2191	76	_objarray_stack.push(task);
jcoomes@1746	77	}
jcoomes@1746	78
stefank@5011	79	template <class T> inline void MarkSweep::adjust_pointer(T* p) {
coleenp@548	80	T heap_oop = oopDesc::load_heap_oop(p);
coleenp@548	81	if (!oopDesc::is_null(heap_oop)) {
coleenp@548	82	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
coleenp@548	83	oop new_obj = oop(obj->mark()->decode_pointer());
coleenp@548	84	assert(new_obj != NULL || // is forwarding ptr?
coleenp@548	85	obj->mark() == markOopDesc::prototype() || // not gc marked?
coleenp@4037	86	(UseBiasedLocking && obj->mark()->has_bias_pattern()),
coleenp@548	87	// not gc marked?
coleenp@548	88	"should be forwarded");
coleenp@548	89	if (new_obj != NULL) {
coleenp@548	90	assert(Universe::heap()->is_in_reserved(new_obj),
coleenp@548	91	"should be in object space");
coleenp@548	92	oopDesc::encode_store_heap_oop_not_null(p, new_obj);
coleenp@548	93	}
coleenp@548	94	}
coleenp@548	95	}
coleenp@548	96
coleenp@548	97	template <class T> inline void MarkSweep::KeepAliveClosure::do_oop_work(T* p) {
coleenp@548	98	mark_and_push(p);
coleenp@548	99	}
stefank@2314	100
stefank@2314	101	#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_MARKSWEEP_INLINE_HPP