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.
22 *
23 */
24
25 #ifndef SHARE_OOPS_METHOD_INLINE_HPP
26 #define SHARE_OOPS_METHOD_INLINE_HPP
27
28 #include "oops/method.hpp"
29
30 #include "runtime/atomic.hpp"
31
from_compiled_entry() const32 inline address Method::from_compiled_entry() const {
33 return Atomic::load_acquire(&_from_compiled_entry);
34 }
35
from_interpreted_entry() const36 inline address Method::from_interpreted_entry() const {
37 return Atomic::load_acquire(&_from_interpreted_entry);
38 }
39
set_method_data(MethodData * data)40 inline void Method::set_method_data(MethodData* data) {
41 // The store into method must be released. On platforms without
42 // total store order (TSO) the reference may become visible before
43 // the initialization of data otherwise.
44 Atomic::release_store(&_method_data, data);
45 }
46
code() const47 inline CompiledMethod* volatile Method::code() const {
48 assert( check_code(), "" );
49 return Atomic::load_acquire(&_code);
50 }
51
52 // Write (bci, line number) pair to stream
write_pair_regular(int bci_delta,int line_delta)53 inline void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) {
54 // bci and line number does not compress into single byte.
55 // Write out escape character and use regular compression for bci and line number.
56 write_byte((jubyte)0xFF);
57 write_signed_int(bci_delta);
58 write_signed_int(line_delta);
59 }
60
write_pair_inline(int bci,int line)61 inline void CompressedLineNumberWriteStream::write_pair_inline(int bci, int line) {
62 int bci_delta = bci - _bci;
63 int line_delta = line - _line;
64 _bci = bci;
65 _line = line;
66 // Skip (0,0) deltas - they do not add information and conflict with terminator.
67 if (bci_delta == 0 && line_delta == 0) return;
68 // Check if bci is 5-bit and line number 3-bit unsigned.
69 if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
70 // Compress into single byte.
71 jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
72 // Check that value doesn't match escape character.
73 if (value != 0xFF) {
74 write_byte(value);
75 return;
76 }
77 }
78 write_pair_regular(bci_delta, line_delta);
79 }
80
write_pair(int bci,int line)81 inline void CompressedLineNumberWriteStream::write_pair(int bci, int line) {
82 write_pair_inline(bci, line);
83 }
84
has_compiled_code() const85 inline bool Method::has_compiled_code() const { return code() != NULL; }
86
is_empty_method() const87 inline bool Method::is_empty_method() const {
88 return code_size() == 1
89 && *code_base() == Bytecodes::_return;
90 }
91
92 #endif // SHARE_OOPS_METHOD_INLINE_HPP
93