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src/share/vm/gc_implementation/parallelScavenge/psScavenge.inline.hpp@82db0859acbe (annotated)

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

Fri, 28 Mar 2008 23:35:42 -0700

author

jcoomes

date

Fri, 28 Mar 2008 23:35:42 -0700

changeset 514

82db0859acbe

parent 435

a61af66fc99e

child 548

ba764ed4b6f2

permissions

-rw-r--r--

6642862: Code cache allocation fails with large pages after 6588638
Reviewed-by: apetrusenko

duke@435	1	/*
duke@435	2	* Copyright 2002-2006 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25
duke@435	26	inline void PSScavenge::save_to_space_top_before_gc() {
duke@435	27	ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
duke@435	28	_to_space_top_before_gc = heap->young_gen()->to_space()->top();
duke@435	29	}
duke@435	30
duke@435	31	inline bool PSScavenge::should_scavenge(oop p) {
duke@435	32	return p == NULL ? false : PSScavenge::is_obj_in_young((HeapWord*) p);
duke@435	33	}
duke@435	34
duke@435	35	inline bool PSScavenge::should_scavenge(oop p, MutableSpace* to_space) {
duke@435	36	if (should_scavenge(p)) {
duke@435	37	// Skip objects copied to to_space since the scavenge started.
duke@435	38	HeapWord* const addr = (HeapWord*) p;
duke@435	39	return addr < to_space_top_before_gc() || addr >= to_space->end();
duke@435	40	}
duke@435	41	return false;
duke@435	42	}
duke@435	43
duke@435	44	inline bool PSScavenge::should_scavenge(oop p, bool check_to_space) {
duke@435	45	if (check_to_space) {
duke@435	46	ParallelScavengeHeap* heap = (ParallelScavengeHeap*) Universe::heap();
duke@435	47	return should_scavenge(p, heap->young_gen()->to_space());
duke@435	48	}
duke@435	49	return should_scavenge(p);
duke@435	50	}
duke@435	51
duke@435	52	// Attempt to "claim" oop at p via CAS, push the new obj if successful
duke@435	53	// This version tests the oop* to make sure it is within the heap before
duke@435	54	// attempting marking.
duke@435	55	inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm,
duke@435	56	oop* p) {
duke@435	57	assert(should_scavenge(*p, true), "revisiting object?");
duke@435	58
duke@435	59	oop o = *p;
duke@435	60	if (o->is_forwarded()) {
duke@435	61	*p = o->forwardee();
duke@435	62	} else {
duke@435	63	*p = pm->copy_to_survivor_space(o, pm->depth_first());
duke@435	64	}
duke@435	65
duke@435	66	// We cannot mark without test, as some code passes us pointers
duke@435	67	// that are outside the heap.
duke@435	68	if ((!PSScavenge::is_obj_in_young((HeapWord*) p)) &&
duke@435	69	Universe::heap()->is_in_reserved(p)) {
duke@435	70	o = *p;
duke@435	71	if (PSScavenge::is_obj_in_young((HeapWord*) o)) {
duke@435	72	card_table()->inline_write_ref_field_gc(p, o);
duke@435	73	}
duke@435	74	}
duke@435	75	}