Mercurial > hg > truffle
annotate src/share/vm/oops/constMethodOop.cpp @ 6233:d5bc62fcfac7
Merge
author | zgu |
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date | Thu, 19 Jul 2012 09:10:12 -0400 |
parents | 2fe087c3e814 |
children | 8150fa46d2ed |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "oops/constMethodOop.hpp" | |
27 #include "oops/methodOop.hpp" | |
0 | 28 |
29 // Static initialization | |
30 const u2 constMethodOopDesc::MAX_IDNUM = 0xFFFE; | |
31 const u2 constMethodOopDesc::UNSET_IDNUM = 0xFFFF; | |
32 | |
33 // How big must this constMethodObject be? | |
34 | |
35 int constMethodOopDesc::object_size(int code_size, | |
36 int compressed_line_number_size, | |
37 int local_variable_table_length, | |
38 int checked_exceptions_length) { | |
39 int extra_bytes = code_size; | |
40 if (compressed_line_number_size > 0) { | |
41 extra_bytes += compressed_line_number_size; | |
42 } | |
43 if (checked_exceptions_length > 0) { | |
44 extra_bytes += sizeof(u2); | |
45 extra_bytes += checked_exceptions_length * sizeof(CheckedExceptionElement); | |
46 } | |
47 if (local_variable_table_length > 0) { | |
48 extra_bytes += sizeof(u2); | |
49 extra_bytes += | |
50 local_variable_table_length * sizeof(LocalVariableTableElement); | |
51 } | |
52 int extra_words = align_size_up(extra_bytes, BytesPerWord) / BytesPerWord; | |
53 return align_object_size(header_size() + extra_words); | |
54 } | |
55 | |
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56 methodOop constMethodOopDesc::method() const { |
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57 return instanceKlass::cast(_constants->pool_holder())->method_with_idnum( |
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58 _method_idnum); |
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59 } |
0 | 60 |
61 // linenumber table - note that length is unknown until decompression, | |
62 // see class CompressedLineNumberReadStream. | |
63 | |
64 u_char* constMethodOopDesc::compressed_linenumber_table() const { | |
65 // Located immediately following the bytecodes. | |
66 assert(has_linenumber_table(), "called only if table is present"); | |
67 return code_end(); | |
68 } | |
69 | |
70 u2* constMethodOopDesc::checked_exceptions_length_addr() const { | |
71 // Located at the end of the constMethod. | |
72 assert(has_checked_exceptions(), "called only if table is present"); | |
73 return last_u2_element(); | |
74 } | |
75 | |
76 u2* constMethodOopDesc::localvariable_table_length_addr() const { | |
77 assert(has_localvariable_table(), "called only if table is present"); | |
78 if (has_checked_exceptions()) { | |
79 // If checked_exception present, locate immediately before them. | |
80 return (u2*) checked_exceptions_start() - 1; | |
81 } else { | |
82 // Else, the linenumber table is at the end of the constMethod. | |
83 return last_u2_element(); | |
84 } | |
85 } | |
86 | |
87 | |
88 // Update the flags to indicate the presence of these optional fields. | |
89 void constMethodOopDesc::set_inlined_tables_length( | |
90 int checked_exceptions_len, | |
91 int compressed_line_number_size, | |
92 int localvariable_table_len) { | |
93 // Must be done in the order below, otherwise length_addr accessors | |
94 // will not work. Only set bit in header if length is positive. | |
95 assert(_flags == 0, "Error"); | |
96 if (compressed_line_number_size > 0) { | |
97 _flags |= _has_linenumber_table; | |
98 } | |
99 if (checked_exceptions_len > 0) { | |
100 _flags |= _has_checked_exceptions; | |
101 *(checked_exceptions_length_addr()) = checked_exceptions_len; | |
102 } | |
103 if (localvariable_table_len > 0) { | |
104 _flags |= _has_localvariable_table; | |
105 *(localvariable_table_length_addr()) = localvariable_table_len; | |
106 } | |
107 } | |
108 | |
109 | |
110 int constMethodOopDesc::checked_exceptions_length() const { | |
111 return has_checked_exceptions() ? *(checked_exceptions_length_addr()) : 0; | |
112 } | |
113 | |
114 | |
115 CheckedExceptionElement* constMethodOopDesc::checked_exceptions_start() const { | |
116 u2* addr = checked_exceptions_length_addr(); | |
117 u2 length = *addr; | |
118 assert(length > 0, "should only be called if table is present"); | |
119 addr -= length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
120 return (CheckedExceptionElement*) addr; | |
121 } | |
122 | |
123 | |
124 int constMethodOopDesc::localvariable_table_length() const { | |
125 return has_localvariable_table() ? *(localvariable_table_length_addr()) : 0; | |
126 } | |
127 | |
128 | |
129 LocalVariableTableElement* constMethodOopDesc::localvariable_table_start() const { | |
130 u2* addr = localvariable_table_length_addr(); | |
131 u2 length = *addr; | |
132 assert(length > 0, "should only be called if table is present"); | |
133 addr -= length * sizeof(LocalVariableTableElement) / sizeof(u2); | |
134 return (LocalVariableTableElement*) addr; | |
135 } |