Thu, 26 Jun 2014 11:36:58 +0200
8047818: G1 HeapRegions can no longer be ContiguousSpaces
Summary: Change parent of G1OffsetTableContigSpace to CompactibleSpace, reimplement missing functionality
Reviewed-by: stefank, jmasa, tschatzl
1 /*
2 * Copyright (c) 1997, 2013, 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
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7 * published by the Free Software Foundation.
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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).
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15 * You should have received a copy of the GNU General Public License version
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #include "precompiled.hpp"
26 #include "memory/iterator.hpp"
27 #include "oops/oop.inline.hpp"
29 void KlassToOopClosure::do_klass(Klass* k) {
30 assert(_oop_closure != NULL, "Not initialized?");
31 k->oops_do(_oop_closure);
32 }
34 void CLDToOopClosure::do_cld(ClassLoaderData* cld) {
35 cld->oops_do(_oop_closure, &_klass_closure, _must_claim_cld);
36 }
38 void ObjectToOopClosure::do_object(oop obj) {
39 obj->oop_iterate(_cl);
40 }
42 void VoidClosure::do_void() {
43 ShouldNotCallThis();
44 }
46 MarkingCodeBlobClosure::MarkScope::MarkScope(bool activate)
47 : _active(activate)
48 {
49 if (_active) nmethod::oops_do_marking_prologue();
50 }
52 MarkingCodeBlobClosure::MarkScope::~MarkScope() {
53 if (_active) nmethod::oops_do_marking_epilogue();
54 }
56 void MarkingCodeBlobClosure::do_code_blob(CodeBlob* cb) {
57 nmethod* nm = cb->as_nmethod_or_null();
58 if (nm == NULL) return;
59 if (!nm->test_set_oops_do_mark()) {
60 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, 1st visit\n"));
61 do_newly_marked_nmethod(nm);
62 } else {
63 NOT_PRODUCT(if (TraceScavenge) nm->print_on(tty, "oops_do, skipped on 2nd visit\n"));
64 }
65 }
67 void CodeBlobToOopClosure::do_newly_marked_nmethod(nmethod* nm) {
68 nm->oops_do(_cl, /*allow_zombie=*/ false);
69 }
71 void CodeBlobToOopClosure::do_code_blob(CodeBlob* cb) {
72 if (!_do_marking) {
73 nmethod* nm = cb->as_nmethod_or_null();
74 NOT_PRODUCT(if (TraceScavenge && Verbose && nm != NULL) nm->print_on(tty, "oops_do, unmarked visit\n"));
75 // This assert won't work, since there are lots of mini-passes
76 // (mostly in debug mode) that co-exist with marking phases.
77 //assert(!(cb->is_nmethod() && ((nmethod*)cb)->test_oops_do_mark()), "found marked nmethod during mark-free phase");
78 if (nm != NULL) {
79 nm->oops_do(_cl);
80 }
81 } else {
82 MarkingCodeBlobClosure::do_code_blob(cb);
83 }
84 }