1 /*
2 * Copyright (c) 2015, 2017, 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/access.inline.hpp"
32 #include "oops/compressedOops.inline.hpp"
33 #include "oops/oop.inline.hpp"
34
35 template <typename T>
do_oop_work(T * p)36 void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop_work(T* p) {
37 _work->do_oop(p);
38 T oop_or_narrowoop = RawAccess<>::oop_load(p);
39 if (!CompressedOops::is_null(oop_or_narrowoop)) {
40 oop o = CompressedOops::decode_not_null(oop_or_narrowoop);
41 HeapRegion* hr = _g1h->heap_region_containing(o);
42 assert(!_g1h->is_in_cset(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");
43 hr->add_strong_code_root(_nm);
44 }
45 }
46
do_oop(oop * o)47 void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop(oop* o) {
48 do_oop_work(o);
49 }
50
do_oop(narrowOop * o)51 void G1CodeBlobClosure::HeapRegionGatheringOopClosure::do_oop(narrowOop* o) {
52 do_oop_work(o);
53 }
54
do_code_blob(CodeBlob * cb)55 void G1CodeBlobClosure::do_code_blob(CodeBlob* cb) {
56 nmethod* nm = cb->as_nmethod_or_null();
57 if (nm != NULL) {
58 if (!nm->test_set_oops_do_mark()) {
59 _oc.set_nm(nm);
60 nm->oops_do(&_oc);
61 nm->fix_oop_relocations();
62 }
63 }
64 }
65
66