1 /*
2 * Copyright (c) 2015, 2018, 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/codeCache.hpp"
27 #include "code/relocInfo.hpp"
28 #include "code/relocInfo_ext.hpp"
29 #include "gc/shared/cardTable.hpp"
30 #include "gc/shared/cardTableBarrierSet.hpp"
31 #include "gc/shared/collectedHeap.hpp"
32 #include "memory/universe.hpp"
33 #include "runtime/os.hpp"
34 #include "utilities/debug.hpp"
35 #ifdef COMPILER1
36 #include "c1/c1_globals.hpp"
37 #endif
38
39 address symbolic_Relocation::symbolic_value(symbolic_Relocation::symbolic_reference t) {
40 if (Universe::heap() == NULL) {
41 // the symbolic values are not needed so early
42 // (and most of them lead to errors if asked too early)
43 return NULL;
44 }
45 switch(t) {
46 case symbolic_Relocation::polling_page_reference: {
47 return os::get_polling_page();
48 }
49 case symbolic_Relocation::eden_top_reference: {
50 if (!Universe::heap()->supports_inline_contig_alloc()) {
51 return NULL;
52 }
53 return (address)Universe::heap()->top_addr();
54 }
55 case symbolic_Relocation::heap_end_reference: {
56 if (!Universe::heap()->supports_inline_contig_alloc()) {
57 return NULL;
58 }
59 return (address)Universe::heap()->end_addr();
60 }
61 case symbolic_Relocation::card_table_reference: {
62 BarrierSet* bs = Universe::heap()->barrier_set();
63 CardTableBarrierSet* ctbs = barrier_set_cast<CardTableBarrierSet>(bs);
64 CardTable* ct = ctbs->card_table();
65 return (address)ct->byte_map_base();
66 }
67 case symbolic_Relocation::mark_bits_reference: {
68 return (address)Universe::verify_mark_bits();
69 }
70 case symbolic_Relocation::mark_mask_reference: {
71 return (address)Universe::verify_mark_mask();
72 }
73 case symbolic_Relocation::oop_bits_reference: {
74 return (address)Universe::verify_oop_bits();
75 }
76 case symbolic_Relocation::oop_mask_reference: {
77 return (address)Universe::verify_oop_mask();
78 }
79 case symbolic_Relocation::debug_string_reference: {
80 return (address)"<Lost debug string>";
81 }
82 default: {
83 // missing declaration
84 ShouldNotReachHere();
85 return NULL;
86 }
87 }
88 }