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
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23 */
24
25#ifndef SHARE_OOPS_METHOD_INLINE_HPP
26#define SHARE_OOPS_METHOD_INLINE_HPP
27
28#include "oops/method.hpp"
29#include "runtime/orderAccess.hpp"
30
31inline address Method::from_compiled_entry() const {
32 return OrderAccess::load_acquire(&_from_compiled_entry);
33}
34
35inline address Method::from_interpreted_entry() const {
36 return OrderAccess::load_acquire(&_from_interpreted_entry);
37}
38
39inline void Method::set_method_data(MethodData* data) {
40 // The store into method must be released. On platforms without
41 // total store order (TSO) the reference may become visible before
42 // the initialization of data otherwise.
43 OrderAccess::release_store(&_method_data, data);
44}
45
46inline CompiledMethod* volatile Method::code() const {
47 assert( check_code(), "" );
48 return OrderAccess::load_acquire(&_code);
49}
50
51// Write (bci, line number) pair to stream
52inline void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) {
53 // bci and line number does not compress into single byte.
54 // Write out escape character and use regular compression for bci and line number.
55 write_byte((jubyte)0xFF);
56 write_signed_int(bci_delta);
57 write_signed_int(line_delta);
58}
59
60inline void CompressedLineNumberWriteStream::write_pair_inline(int bci, int line) {
61 int bci_delta = bci - _bci;
62 int line_delta = line - _line;
63 _bci = bci;
64 _line = line;
65 // Skip (0,0) deltas - they do not add information and conflict with terminator.
66 if (bci_delta == 0 && line_delta == 0) return;
67 // Check if bci is 5-bit and line number 3-bit unsigned.
68 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
69 // Compress into single byte.
70 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
71 // Check that value doesn't match escape character.
72 if (value != 0xFF) {
73 write_byte(value);
74 return;
75 }
76 }
77 write_pair_regular(bci_delta, line_delta);
78}
79
80inline void CompressedLineNumberWriteStream::write_pair(int bci, int line) {
81 write_pair_inline(bci, line);
82}
83
84inline bool Method::has_compiled_code() const { return code() != NULL; }
85
86#endif // SHARE_OOPS_METHOD_INLINE_HPP
87