1 /* 2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP 27 28 #include "gc_implementation/g1/g1RemSet.hpp" 29 #include "gc_implementation/g1/heapRegion.hpp" 30 #include "gc_implementation/g1/heapRegionRemSet.hpp" 31 #include "oops/oop.inline.hpp" 32 33 inline uint G1RemSet::n_workers() { 34 if (_g1->workers() != NULL) { 35 return _g1->workers()->total_workers(); 36 } else { 37 return 1; 38 } 39 } 40 41 template <class T> 42 inline void G1RemSet::write_ref(HeapRegion* from, T* p) { 43 par_write_ref(from, p, 0); 44 } 45 46 template <class T> 47 inline void G1RemSet::par_write_ref(HeapRegion* from, T* p, uint tid) { 48 oop obj = oopDesc::load_decode_heap_oop(p); 49 if (obj == NULL) { 50 return; 51 } 52 53 #ifdef ASSERT 54 // can't do because of races 55 // assert(obj == NULL || obj->is_oop(), "expected an oop"); 56 57 // Do the safe subset of is_oop 58 #ifdef CHECK_UNHANDLED_OOPS 59 oopDesc* o = obj.obj(); 60 #else 61 oopDesc* o = obj; 62 #endif // CHECK_UNHANDLED_OOPS 63 assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); 64 assert(Universe::heap()->is_in_reserved(obj), "must be in heap"); 65 #endif // ASSERT 66 67 assert(from == NULL || from->is_in_reserved(p), "p is not in from"); 68 69 HeapRegion* to = _g1->heap_region_containing(obj); 70 if (from != to) { 71 assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); 72 to->rem_set()->add_reference(p, tid); 73 } 74 } 75 76 template <class T> 77 inline void UpdateRSOopClosure::do_oop_work(T* p) { 78 assert(_from != NULL, "from region must be non-NULL"); 79 _rs->par_write_ref(_from, p, _worker_i); 80 } 81 82 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP