Mercurial > hg > graal-compiler
view src/share/vm/memory/genOopClosures.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 |
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children | ba764ed4b6f2 |
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/* * Copyright 2001-2007 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 OopsInGenClosure::OopsInGenClosure(Generation* gen) : OopClosure(gen->ref_processor()), _orig_gen(gen), _rs(NULL) { set_generation(gen); } inline void OopsInGenClosure::set_generation(Generation* gen) { _gen = gen; _gen_boundary = _gen->reserved().start(); // Barrier set for the heap, must be set after heap is initialized if (_rs == NULL) { GenRemSet* rs = SharedHeap::heap()->rem_set(); assert(rs->rs_kind() == GenRemSet::CardTable, "Wrong rem set kind"); _rs = (CardTableRS*)rs; } } inline void OopsInGenClosure::do_barrier(oop* p) { assert(generation()->is_in_reserved(p), "expected ref in generation"); oop obj = *p; assert(obj != NULL, "expected non-null object"); // If p points to a younger generation, mark the card. if ((HeapWord*)obj < _gen_boundary) { _rs->inline_write_ref_field_gc(p, obj); } } // NOTE! Any changes made here should also be made // in FastScanClosure::do_oop(); inline void ScanClosure::do_oop(oop* p) { oop obj = *p; // Should we copy the obj? if (obj != NULL) { if ((HeapWord*)obj < _boundary) { assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); if (obj->is_forwarded()) { *p = obj->forwardee(); } else { *p = _g->copy_to_survivor_space(obj, p); } } if (_gc_barrier) { // Now call parent closure do_barrier(p); } } } inline void ScanClosure::do_oop_nv(oop* p) { ScanClosure::do_oop(p); } // NOTE! Any changes made here should also be made // in ScanClosure::do_oop(); inline void FastScanClosure::do_oop(oop* p) { oop obj = *p; // Should we copy the obj? if (obj != NULL) { if ((HeapWord*)obj < _boundary) { assert(!_g->to()->is_in_reserved(obj), "Scanning field twice?"); if (obj->is_forwarded()) { *p = obj->forwardee(); } else { *p = _g->copy_to_survivor_space(obj, p); } if (_gc_barrier) { // Now call parent closure do_barrier(p); } } } } inline void FastScanClosure::do_oop_nv(oop* p) { FastScanClosure::do_oop(p); } // Note similarity to ScanClosure; the difference is that // the barrier set is taken care of outside this closure. inline void ScanWeakRefClosure::do_oop(oop* p) { oop obj = *p; assert (obj != NULL, "null weak reference?"); // weak references are sometimes scanned twice; must check // that to-space doesn't already contain this object if ((HeapWord*)obj < _boundary && !_g->to()->is_in_reserved(obj)) { if (obj->is_forwarded()) { *p = obj->forwardee(); } else { *p = _g->copy_to_survivor_space(obj, p); } } } inline void ScanWeakRefClosure::do_oop_nv(oop* p) { ScanWeakRefClosure::do_oop(p); }