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