1 /* 2 * Copyright (c) 2001, 2016, 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_G1_G1REMSET_INLINE_HPP 26 #define SHARE_VM_GC_G1_G1REMSET_INLINE_HPP 27 28 #include "gc/g1/g1RemSet.hpp" 29 #include "gc/g1/heapRegion.hpp" 30 #include "gc/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::par_write_ref(HeapRegion* from, T* p, uint tid) { 39 oop obj = oopDesc::load_decode_heap_oop(p); 40 if (obj == NULL) { 41 return; 42 } 43 44 #ifdef ASSERT 45 // can't do because of races 46 // assert(obj == NULL || obj->is_oop(), "expected an oop"); 47 48 // Do the safe subset of is_oop 49 #ifdef CHECK_UNHANDLED_OOPS 50 oopDesc* o = obj.obj(); 51 #else 52 oopDesc* o = obj; 53 #endif // CHECK_UNHANDLED_OOPS 54 assert(((intptr_t)o & MinObjAlignmentInBytesMask) == 0, "not oop aligned"); 55 assert(_g1->is_in_reserved(obj), "must be in heap"); 56 #endif // ASSERT 57 58 assert(from->is_in_reserved(p) || from->is_starts_humongous(), "p is not in from"); 59 60 HeapRegion* to = _g1->heap_region_containing(obj); 61 if (from != to) { 62 assert(to->rem_set() != NULL, "Need per-region 'into' remsets."); 63 to->rem_set()->add_reference(p, tid); 64 } 65 } 66 67 template <class T> 68 inline void UpdateRSOopClosure::do_oop_work(T* p) { 69 assert(_from != NULL, "from region must be non-NULL"); 70 _rs->par_write_ref(_from, p, _worker_i); 71 } 72 73 #endif // SHARE_VM_GC_G1_G1REMSET_INLINE_HPP