1 /* 2 * Copyright (c) 2001, 2015, 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 return _g1->workers()->total_workers(); 35 } 36 37 template <class T> 38 inline void G1RemSet::write_ref(HeapRegion* from, T* p) { 39 par_write_ref(from, p, 0); 40 } 41 42 template <class T> 43 inline void G1RemSet::par_write_ref(HeapRegion* from, T* p, uint tid) { 44 oop obj = oopDesc::load_decode_heap_oop(p); 45 if (obj == NULL) { 46 return; 47 } 48 49 #ifdef ASSERT 50 // can't do because of races 51 // assert(obj == NULL || obj->is_oop(), "expected an oop"); 52 53 // Do the safe subset of is_oop 54 #ifdef CHECK_UNHANDLED_OOPS 55 oopDesc* o = obj.obj(); 56 #else 57 oopDesc* o = obj; 58 #endif // CHECK_UNHANDLED_OOPS 59 assert((intptr_t)o % MinObjAlignmentInBytes == 0, "not oop aligned"); 60 assert(_g1->is_in_reserved(obj), "must be in heap"); 61 #endif // ASSERT 62 63 assert(from == NULL || from->is_in_reserved(p), "p is not in from"); 64 65 HeapRegion* to = _g1->heap_region_containing(obj); 66 if (from != to) { 67 assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); 68 to->rem_set()->add_reference(p, tid); 69 } 70 } 71 72 template <class T> 73 inline void UpdateRSOopClosure::do_oop_work(T* p) { 74 assert(_from != NULL, "from region must be non-NULL"); 75 _rs->par_write_ref(_from, p, _worker_i); 76 } 77 78 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSET_INLINE_HPP