• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp@a93a9eda13f7 (annotated)

src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp

Fri, 16 Jul 2010 21:33:21 -0700

author

jcoomes

date

Fri, 16 Jul 2010 21:33:21 -0700

changeset 2020

a93a9eda13f7

parent 1907

c18cbe5936b8

child 2061

9d7a8ab3736b

permissions

-rw-r--r--

6962947: shared TaskQueue statistics
Reviewed-by: tonyp, ysr

duke@435	1	/*
trims@1907	2	* Copyright (c) 2002, 2008, 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
duke@435	25	inline void PSScavenge::save_to_space_top_before_gc() {
duke@435	26	ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
duke@435	27	_to_space_top_before_gc = heap->young_gen()->to_space()->top();
duke@435	28	}
duke@435	29
coleenp@548	30	template <class T> inline bool PSScavenge::should_scavenge(T* p) {
coleenp@548	31	T heap_oop = oopDesc::load_heap_oop(p);
coleenp@548	32	if (oopDesc::is_null(heap_oop)) return false;
coleenp@548	33	oop obj = oopDesc::decode_heap_oop_not_null(heap_oop);
coleenp@548	34	return PSScavenge::is_obj_in_young((HeapWord*)obj);
duke@435	35	}
duke@435	36
coleenp@548	37	template <class T>
coleenp@548	38	inline bool PSScavenge::should_scavenge(T* p, MutableSpace* to_space) {
duke@435	39	if (should_scavenge(p)) {
coleenp@548	40	oop obj = oopDesc::load_decode_heap_oop_not_null(p);
duke@435	41	// Skip objects copied to to_space since the scavenge started.
coleenp@548	42	HeapWord* const addr = (HeapWord*)obj;
duke@435	43	return addr < to_space_top_before_gc() || addr >= to_space->end();
duke@435	44	}
duke@435	45	return false;
duke@435	46	}
duke@435	47
coleenp@548	48	template <class T>
coleenp@548	49	inline bool PSScavenge::should_scavenge(T* p, bool check_to_space) {
duke@435	50	if (check_to_space) {
coleenp@548	51	ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
duke@435	52	return should_scavenge(p, heap->young_gen()->to_space());
duke@435	53	}
duke@435	54	return should_scavenge(p);
duke@435	55	}
duke@435	56
duke@435	57	// Attempt to "claim" oop at p via CAS, push the new obj if successful
duke@435	58	// This version tests the oop* to make sure it is within the heap before
duke@435	59	// attempting marking.
coleenp@548	60	template <class T>
duke@435	61	inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm,
coleenp@548	62	T* p) {
coleenp@548	63	assert(should_scavenge(p, true), "revisiting object?");
duke@435	64
coleenp@548	65	oop o = oopDesc::load_decode_heap_oop_not_null(p);
coleenp@548	66	oop new_obj = o->is_forwarded()
coleenp@548	67	? o->forwardee()
coleenp@548	68	: pm->copy_to_survivor_space(o, pm->depth_first());
coleenp@548	69	oopDesc::encode_store_heap_oop_not_null(p, new_obj);
duke@435	70
duke@435	71	// We cannot mark without test, as some code passes us pointers
duke@435	72	// that are outside the heap.
coleenp@548	73	if ((!PSScavenge::is_obj_in_young((HeapWord*)p)) &&
duke@435	74	Universe::heap()->is_in_reserved(p)) {
coleenp@548	75	if (PSScavenge::is_obj_in_young((HeapWord*)new_obj)) {
coleenp@548	76	card_table()->inline_write_ref_field_gc(p, new_obj);
duke@435	77	}
duke@435	78	}
duke@435	79	}