1 /*
2 * Copyright (c) 2018, 2019, 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.
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23 */
24
25 #ifndef SHARE_OOPS_CONSTANTPOOL_INLINE_HPP
26 #define SHARE_OOPS_CONSTANTPOOL_INLINE_HPP
27
28 #include "oops/constantPool.hpp"
29 #include "oops/cpCache.inline.hpp"
30 #include "runtime/atomic.hpp"
31
slot_at(int which) const32 inline CPSlot ConstantPool::slot_at(int which) const {
33 assert(is_within_bounds(which), "index out of bounds");
34 assert(!tag_at(which).is_unresolved_klass() && !tag_at(which).is_unresolved_klass_in_error(), "Corrupted constant pool");
35 // Uses volatile because the klass slot changes without a lock.
36 intptr_t adr = Atomic::load_acquire(obj_at_addr(which));
37 assert(adr != 0 || which == 0, "cp entry for klass should not be zero");
38 return CPSlot(adr);
39 }
40
resolved_klass_at(int which) const41 inline Klass* ConstantPool::resolved_klass_at(int which) const { // Used by Compiler
42 guarantee(tag_at(which).is_klass(), "Corrupted constant pool");
43 // Must do an acquire here in case another thread resolved the klass
44 // behind our back, lest we later load stale values thru the oop.
45 CPKlassSlot kslot = klass_slot_at(which);
46 assert(tag_at(kslot.name_index()).is_symbol(), "sanity");
47
48 Klass** adr = resolved_klasses()->adr_at(kslot.resolved_klass_index());
49 return Atomic::load_acquire(adr);
50 }
51
is_pseudo_string_at(int which)52 inline bool ConstantPool::is_pseudo_string_at(int which) {
53 assert(tag_at(which).is_string(), "Corrupted constant pool");
54 return slot_at(which).is_pseudo_string();
55 }
56
pseudo_string_at(int which,int obj_index)57 inline oop ConstantPool::pseudo_string_at(int which, int obj_index) {
58 assert(is_pseudo_string_at(which), "must be a pseudo-string");
59 oop s = resolved_references()->obj_at(obj_index);
60 return s;
61 }
62
pseudo_string_at(int which)63 inline oop ConstantPool::pseudo_string_at(int which) {
64 assert(is_pseudo_string_at(which), "must be a pseudo-string");
65 int obj_index = cp_to_object_index(which);
66 oop s = resolved_references()->obj_at(obj_index);
67 return s;
68 }
69
70 #endif // SHARE_OOPS_CONSTANTPOOL_INLINE_HPP
71