1 /* 2 * Copyright (c) 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 #include "precompiled.hpp" 26 #include "code/nmethod.hpp" 27 #include "gc/g1/g1CodeBlobClosure.hpp" 28 #include "gc/g1/g1CollectedHeap.inline.hpp" 29 #include "gc/g1/heapRegion.hpp" 30 #include "gc/g1/heapRegionRemSet.hpp" 31 #include "oops/oop.inline.hpp" 32 33 template <typename T> 34 void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop_work(T* p) { 35 _work->do_oop(p); 36 T oop_or_narrowoop = oopDesc::load_heap_oop(p); 37 if (!oopDesc::is_null(oop_or_narrowoop)) { 38 oop o = oopDesc::decode_heap_oop_not_null(oop_or_narrowoop); 39 HeapRegion* hr = _g1h->heap_region_containing(o); 40 assert(!_g1h->obj_in_cs(o) || hr->rem_set()->strong_code_roots_list_contains(_nm), "if o still in collection set then evacuation failed and nm must already be in the remset"); 41 hr->add_strong_code_root(_nm); 42 } 43 } 44 45 void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop(oop* o) { 46 do_oop_work(o); 47 } 48 49 void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop(narrowOop* o) { 50 do_oop_work(o); 51 } 52 53 void G1CodeBlobClosure::do_code_blob(CodeBlob* cb) { 54 nmethod* nm = cb->as_nmethod_or_null(); 55 if (nm != NULL) { 56 if (!nm->test_set_oops_do_mark()) { 57 _oc.set_nm(nm); 58 nm->oops_do(&_oc); 59 nm->fix_oop_relocations(); 60 } 61 } 62 } 63