Mercurial > hg > graal-compiler
diff src/share/vm/gc_implementation/parallelScavenge/psScavenge.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/gc_implementation/parallelScavenge/psScavenge.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,75 @@ +/* + * Copyright 2002-2006 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 PSScavenge::save_to_space_top_before_gc() { + ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap(); + _to_space_top_before_gc = heap->young_gen()->to_space()->top(); +} + +inline bool PSScavenge::should_scavenge(oop p) { + return p == NULL ? false : PSScavenge::is_obj_in_young((HeapWord*) p); +} + +inline bool PSScavenge::should_scavenge(oop p, MutableSpace* to_space) { + if (should_scavenge(p)) { + // Skip objects copied to to_space since the scavenge started. + HeapWord* const addr = (HeapWord*) p; + return addr < to_space_top_before_gc() || addr >= to_space->end(); + } + return false; +} + +inline bool PSScavenge::should_scavenge(oop p, bool check_to_space) { + if (check_to_space) { + ParallelScavengeHeap* heap = (ParallelScavengeHeap*) Universe::heap(); + return should_scavenge(p, heap->young_gen()->to_space()); + } + return should_scavenge(p); +} + +// Attempt to "claim" oop at p via CAS, push the new obj if successful +// This version tests the oop* to make sure it is within the heap before +// attempting marking. +inline void PSScavenge::copy_and_push_safe_barrier(PSPromotionManager* pm, + oop* p) { + assert(should_scavenge(*p, true), "revisiting object?"); + + oop o = *p; + if (o->is_forwarded()) { + *p = o->forwardee(); + } else { + *p = pm->copy_to_survivor_space(o, pm->depth_first()); + } + + // We cannot mark without test, as some code passes us pointers + // that are outside the heap. + if ((!PSScavenge::is_obj_in_young((HeapWord*) p)) && + Universe::heap()->is_in_reserved(p)) { + o = *p; + if (PSScavenge::is_obj_in_young((HeapWord*) o)) { + card_table()->inline_write_ref_field_gc(p, o); + } + } +}