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rev 1083 : [mq]: indy.compiler.inline.patch
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--- old/src/share/vm/oops/constMethodOop.hpp
+++ new/src/share/vm/oops/constMethodOop.hpp
1 1 /*
2 2 * Copyright 2003-2009 Sun Microsystems, Inc. All Rights Reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 21 * have any questions.
22 22 *
23 23 */
24 24
25 25 // An constMethodOop represents portions of a Java method which
26 26 // do not vary.
27 27 //
28 28 // Memory layout (each line represents a word). Note that most
29 29 // applications load thousands of methods, so keeping the size of this
30 30 // structure small has a big impact on footprint.
31 31 //
32 32 // |------------------------------------------------------|
33 33 // | header |
34 34 // | klass |
35 35 // |------------------------------------------------------|
36 36 // | fingerprint 1 |
37 37 // | fingerprint 2 |
38 38 // | method (oop) |
39 39 // | stackmap_data (oop) |
40 40 // | exception_table (oop) |
41 41 // | constMethod_size |
42 42 // | interp_kind | flags | code_size |
43 43 // | name index | signature index |
44 44 // | method_idnum | generic_signature_index |
45 45 // |------------------------------------------------------|
46 46 // | |
47 47 // | byte codes |
48 48 // | |
49 49 // |------------------------------------------------------|
50 50 // | compressed linenumber table |
51 51 // | (see class CompressedLineNumberReadStream) |
52 52 // | (note that length is unknown until decompressed) |
53 53 // | (access flags bit tells whether table is present) |
54 54 // | (indexed from start of constMethodOop) |
55 55 // | (elements not necessarily sorted!) |
56 56 // |------------------------------------------------------|
57 57 // | localvariable table elements + length (length last) |
58 58 // | (length is u2, elements are 6-tuples of u2) |
59 59 // | (see class LocalVariableTableElement) |
60 60 // | (access flags bit tells whether table is present) |
61 61 // | (indexed from end of contMethodOop) |
62 62 // |------------------------------------------------------|
63 63 // | checked exceptions elements + length (length last) |
64 64 // | (length is u2, elements are u2) |
65 65 // | (see class CheckedExceptionElement) |
66 66 // | (access flags bit tells whether table is present) |
67 67 // | (indexed from end of constMethodOop) |
68 68 // |------------------------------------------------------|
69 69
70 70
71 71 // Utitily class decribing elements in checked exceptions table inlined in methodOop.
72 72 class CheckedExceptionElement VALUE_OBJ_CLASS_SPEC {
73 73 public:
74 74 u2 class_cp_index;
75 75 };
76 76
77 77
78 78 // Utitily class decribing elements in local variable table inlined in methodOop.
79 79 class LocalVariableTableElement VALUE_OBJ_CLASS_SPEC {
80 80 public:
81 81 u2 start_bci;
82 82 u2 length;
83 83 u2 name_cp_index;
84 84 u2 descriptor_cp_index;
85 85 u2 signature_cp_index;
86 86 u2 slot;
87 87 };
88 88
89 89
90 90 class constMethodOopDesc : public oopDesc {
91 91 friend class constMethodKlass;
92 92 friend class VMStructs;
93 93 private:
94 94 enum {
95 95 _has_linenumber_table = 1,
96 96 _has_checked_exceptions = 2,
97 97 _has_localvariable_table = 4
98 98 };
99 99
100 100 // Bit vector of signature
101 101 // Callers interpret 0=not initialized yet and
102 102 // -1=too many args to fix, must parse the slow way.
103 103 // The real initial value is special to account for nonatomicity of 64 bit
104 104 // loads and stores. This value may updated and read without a lock by
105 105 // multiple threads, so is volatile.
106 106 volatile uint64_t _fingerprint;
107 107 volatile bool _is_conc_safe; // if true, safe for concurrent GC processing
108 108
109 109 public:
110 110 oop* oop_block_beg() const { return adr_method(); }
111 111 oop* oop_block_end() const { return adr_exception_table() + 1; }
112 112
113 113 private:
114 114 //
115 115 // The oop block. See comment in klass.hpp before making changes.
116 116 //
117 117
118 118 // Backpointer to non-const methodOop (needed for some JVMTI operations)
119 119 methodOop _method;
120 120
121 121 // Raw stackmap data for the method
122 122 typeArrayOop _stackmap_data;
123 123
124 124 // The exception handler table. 4-tuples of ints [start_pc, end_pc,
125 125 // handler_pc, catch_type index] For methods with no exceptions the
126 126 // table is pointing to Universe::the_empty_int_array
127 127 typeArrayOop _exception_table;
128 128
129 129 //
130 130 // End of the oop block.
131 131 //
132 132
133 133 int _constMethod_size;
134 134 jbyte _interpreter_kind;
135 135 jbyte _flags;
136 136
137 137 // Size of Java bytecodes allocated immediately after methodOop.
138 138 u2 _code_size;
139 139 u2 _name_index; // Method name (index in constant pool)
140 140 u2 _signature_index; // Method signature (index in constant pool)
141 141 u2 _method_idnum; // unique identification number for the method within the class
142 142 // initially corresponds to the index into the methods array.
143 143 // but this may change with redefinition
144 144 u2 _generic_signature_index; // Generic signature (index in constant pool, 0 if absent)
145 145
146 146 public:
147 147 // Inlined tables
148 148 void set_inlined_tables_length(int checked_exceptions_len,
149 149 int compressed_line_number_size,
150 150 int localvariable_table_len);
151 151
152 152 bool has_linenumber_table() const
153 153 { return (_flags & _has_linenumber_table) != 0; }
154 154
155 155 bool has_checked_exceptions() const
156 156 { return (_flags & _has_checked_exceptions) != 0; }
157 157
158 158 bool has_localvariable_table() const
159 159 { return (_flags & _has_localvariable_table) != 0; }
160 160
161 161 void set_interpreter_kind(int kind) { _interpreter_kind = kind; }
162 162 int interpreter_kind(void) const { return _interpreter_kind; }
163 163
164 164 // backpointer to non-const methodOop
165 165 methodOop method() const { return _method; }
166 166 void set_method(methodOop m) { oop_store_without_check((oop*)&_method, (oop) m); }
167 167
168 168
169 169 // stackmap table data
170 170 typeArrayOop stackmap_data() const { return _stackmap_data; }
171 171 void set_stackmap_data(typeArrayOop sd) {
172 172 oop_store_without_check((oop*)&_stackmap_data, (oop)sd);
173 173 }
174 174 bool has_stackmap_table() const { return _stackmap_data != NULL; }
175 175
176 176 // exception handler table
177 177 typeArrayOop exception_table() const { return _exception_table; }
178 178 void set_exception_table(typeArrayOop e) { oop_store_without_check((oop*) &_exception_table, (oop) e); }
179 179 bool has_exception_handler() const { return exception_table() != NULL && exception_table()->length() > 0; }
180 180
181 181 void init_fingerprint() {
182 182 const uint64_t initval = CONST64(0x8000000000000000);
183 183 _fingerprint = initval;
184 184 }
185 185
186 186 uint64_t fingerprint() const {
187 187 // Since reads aren't atomic for 64 bits, if any of the high or low order
188 188 // word is the initial value, return 0. See init_fingerprint for initval.
189 189 uint high_fp = (uint)(_fingerprint >> 32);
190 190 if ((int) _fingerprint == 0 || high_fp == 0x80000000) {
191 191 return 0L;
192 192 } else {
193 193 return _fingerprint;
194 194 }
195 195 }
196 196
197 197 uint64_t set_fingerprint(uint64_t new_fingerprint) {
198 198 #ifdef ASSERT
199 199 // Assert only valid if complete/valid 64 bit _fingerprint value is read.
200 200 uint64_t oldfp = fingerprint();
201 201 #endif // ASSERT
202 202 _fingerprint = new_fingerprint;
203 203 assert(oldfp == 0L || new_fingerprint == oldfp,
204 204 "fingerprint cannot change");
205 205 assert(((new_fingerprint >> 32) != 0x80000000) && (int)new_fingerprint !=0,
206 206 "fingerprint should call init to set initial value");
207 207 return new_fingerprint;
208 208 }
209 209
210 210 // name
211 211 int name_index() const { return _name_index; }
212 212 void set_name_index(int index) { _name_index = index; }
213 213
214 214 // signature
215 215 int signature_index() const { return _signature_index; }
216 216 void set_signature_index(int index) { _signature_index = index; }
217 217
218 218 // generics support
219 219 int generic_signature_index() const { return _generic_signature_index; }
220 220 void set_generic_signature_index(int index) { _generic_signature_index = index; }
221 221
222 222 // Sizing
223 223 static int header_size() {
224 224 return sizeof(constMethodOopDesc)/HeapWordSize;
225 225 }
226 226
227 227 // Object size needed
228 228 static int object_size(int code_size, int compressed_line_number_size,
229 229 int local_variable_table_length,
230 230 int checked_exceptions_length);
231 231
232 232 int object_size() const { return _constMethod_size; }
233 233 void set_constMethod_size(int size) { _constMethod_size = size; }
234 234 // Is object parsable by gc
235 235 bool object_is_parsable() { return object_size() > 0; }
236 236
237 237 // code size
238 238 int code_size() const { return _code_size; }
239 239 void set_code_size(int size) {
240 240 assert(max_method_code_size < (1 << 16),
241 241 "u2 is too small to hold method code size in general");
242 242 assert(0 <= size && size <= max_method_code_size, "invalid code size");
243 243 _code_size = size;
244 244 }
245 245
246 246 // linenumber table - note that length is unknown until decompression,
247 247 // see class CompressedLineNumberReadStream.
248 248 u_char* compressed_linenumber_table() const; // not preserved by gc
249 249 u2* checked_exceptions_length_addr() const;
250 250 u2* localvariable_table_length_addr() const;
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251 251
252 252 // checked exceptions
253 253 int checked_exceptions_length() const;
254 254 CheckedExceptionElement* checked_exceptions_start() const;
255 255
256 256 // localvariable table
257 257 int localvariable_table_length() const;
258 258 LocalVariableTableElement* localvariable_table_start() const;
259 259
260 260 // byte codes
261 + void set_code(address code) {
262 + if (code_size() > 0) {
263 + memcpy(code_base(), code, code_size());
264 + }
265 + }
261 266 address code_base() const { return (address) (this+1); }
262 267 address code_end() const { return code_base() + code_size(); }
263 268 bool contains(address bcp) const { return code_base() <= bcp
264 269 && bcp < code_end(); }
265 270 // Offset to bytecodes
266 271 static ByteSize codes_offset()
267 272 { return in_ByteSize(sizeof(constMethodOopDesc)); }
268 273
269 274 // interpreter support
270 275 static ByteSize exception_table_offset()
271 276 { return byte_offset_of(constMethodOopDesc, _exception_table); }
272 277
273 278 // Garbage collection support
274 279 oop* adr_method() const { return (oop*)&_method; }
275 280 oop* adr_stackmap_data() const { return (oop*)&_stackmap_data; }
276 281 oop* adr_exception_table() const { return (oop*)&_exception_table; }
277 282 bool is_conc_safe() { return _is_conc_safe; }
278 283 void set_is_conc_safe(bool v) { _is_conc_safe = v; }
279 284
280 285 // Unique id for the method
281 286 static const u2 MAX_IDNUM;
282 287 static const u2 UNSET_IDNUM;
283 288 u2 method_idnum() const { return _method_idnum; }
284 289 void set_method_idnum(u2 idnum) { _method_idnum = idnum; }
285 290
286 291 private:
287 292 // Since the size of the compressed line number table is unknown, the
288 293 // offsets of the other variable sized sections are computed backwards
289 294 // from the end of the constMethodOop.
290 295
291 296 // First byte after constMethodOop
292 297 address constMethod_end() const
293 298 { return (address)((oop*)this + _constMethod_size); }
294 299
295 300 // Last short in constMethodOop
296 301 u2* last_u2_element() const
297 302 { return (u2*)constMethod_end() - 1; }
298 303 };
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