1 /*
 2  * Copyright (c) 1997, 2021, 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 "classfile/classLoaderDataGraph.hpp"
27 #include "code/nmethod.hpp"
28 #include "gc/shared/barrierSetNMethod.hpp"
29 #include "memory/iterator.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "utilities/debug.hpp"
32 #include "utilities/globalDefinitions.hpp"
33 
34 DoNothingClosure do_nothing_cl;
35 
36 void CLDToOopClosure::do_cld(ClassLoaderData* cld) {
37   cld->oops_do(_oop_closure, _cld_claim);
38 }
39 
40 void ObjectToOopClosure::do_object(oop obj) {
41   obj->oop_iterate(_cl);
42 }
43 
44 void CodeBlobToOopClosure::do_nmethod(nmethod* nm) {
45   nm->oops_do(_cl);
46   if (_fix_relocations) {
47     nm->fix_oop_relocations();
48   }
49 }
50 
51 void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) {
52   nmethod* nm = cb->as_nmethod_or_null();
53   if (nm != NULL) {
54     do_nmethod(nm);
55   }
56 }
57 
58 void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) {
59   nmethod* nm = cb->as_nmethod_or_null();
60   if (nm != NULL && nm->oops_do_try_claim()) {
61     nm->oops_do(_cl);
62     if (_fix_relocations) {
63       nm->fix_oop_relocations();
64     }
65     if (_keepalive_nmethods) {
66       nm->mark_as_maybe_on_continuation();
67       BarrierSetNMethod* bs_nm = BarrierSet::barrier_set()->barrier_set_nmethod();
68       bs_nm->disarm(nm);
69     }
70   }
71 }
72 
73 void CodeBlobToNMethodClosure::do_code_blob(CodeBlob* cb) {
74   nmethod* nm = cb->as_nmethod_or_null();
75   if (nm != NULL) {
76     _nm_cl->do_nmethod(nm);
77   }
78 }