Mercurial > hg > graal-jvmci-8
annotate src/share/vm/oops/constMethod.hpp @ 24157:f4e6ddeb5b6f jvmci-0.31
race in field updates when creating ArrayKlasses can lead to crash (JDK-8182397)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 19 Jul 2017 19:44:11 +0200 |
parents | 32b682649973 |
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rev | line source |
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0 | 1 /* |
23614 | 2 * Copyright (c) 2003, 2016, 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 #ifndef SHARE_VM_OOPS_CONSTMETHODOOP_HPP |
26 #define SHARE_VM_OOPS_CONSTMETHODOOP_HPP | |
27 | |
28 #include "oops/oop.hpp" | |
29 | |
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30 // An ConstMethod* represents portions of a Java method which |
0 | 31 // do not vary. |
32 // | |
33 // Memory layout (each line represents a word). Note that most | |
34 // applications load thousands of methods, so keeping the size of this | |
35 // structure small has a big impact on footprint. | |
36 // | |
37 // |------------------------------------------------------| | |
38 // | header | | |
39 // | klass | | |
40 // |------------------------------------------------------| | |
41 // | fingerprint 1 | | |
42 // | fingerprint 2 | | |
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43 // | constants (oop) | |
0 | 44 // | stackmap_data (oop) | |
45 // | constMethod_size | | |
46 // | interp_kind | flags | code_size | | |
47 // | name index | signature index | | |
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48 // | method_idnum | max_stack | |
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49 // | max_locals | size_of_parameters | |
0 | 50 // |------------------------------------------------------| |
51 // | | | |
52 // | byte codes | | |
53 // | | | |
54 // |------------------------------------------------------| | |
55 // | compressed linenumber table | | |
56 // | (see class CompressedLineNumberReadStream) | | |
57 // | (note that length is unknown until decompressed) | | |
58 // | (access flags bit tells whether table is present) | | |
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59 // | (indexed from start of ConstMethod*) | |
0 | 60 // | (elements not necessarily sorted!) | |
61 // |------------------------------------------------------| | |
62 // | localvariable table elements + length (length last) | | |
63 // | (length is u2, elements are 6-tuples of u2) | | |
64 // | (see class LocalVariableTableElement) | | |
65 // | (access flags bit tells whether table is present) | | |
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66 // | (indexed from end of ConstMethod*) | |
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67 // |------------------------------------------------------| |
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68 // | exception table + length (length last) | |
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69 // | (length is u2, elements are 4-tuples of u2) | |
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70 // | (see class ExceptionTableElement) | |
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71 // | (access flags bit tells whether table is present) | |
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72 // | (indexed from end of ConstMethod*) | |
0 | 73 // |------------------------------------------------------| |
74 // | checked exceptions elements + length (length last) | | |
75 // | (length is u2, elements are u2) | | |
76 // | (see class CheckedExceptionElement) | | |
77 // | (access flags bit tells whether table is present) | | |
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78 // | (indexed from end of ConstMethod*) | |
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79 // |------------------------------------------------------| |
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80 // | method parameters elements + length (length last) | |
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81 // | (length is u2, elements are u2, u4 structures) | |
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82 // | (see class MethodParametersElement) | |
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83 // | (access flags bit tells whether table is present) | |
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84 // | (indexed from end of ConstMethod*) | |
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85 // |------------------------------------------------------| |
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86 // | generic signature index (u2) | |
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87 // | (indexed from start of constMethodOop) | |
0 | 88 // |------------------------------------------------------| |
8031 | 89 // | annotations arrays - method, parameter, type, default| |
90 // | pointer to Array<u1> if annotation is present | | |
91 // |------------------------------------------------------| | |
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92 // |
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93 // IMPORTANT: If anything gets added here, there need to be changes to |
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94 // ensure that ServicabilityAgent doesn't get broken as a result! |
0 | 95 |
96 | |
8031 | 97 // Utility class describing elements in checked exceptions table inlined in Method*. |
0 | 98 class CheckedExceptionElement VALUE_OBJ_CLASS_SPEC { |
99 public: | |
100 u2 class_cp_index; | |
101 }; | |
102 | |
103 | |
8031 | 104 // Utility class describing elements in local variable table inlined in Method*. |
0 | 105 class LocalVariableTableElement VALUE_OBJ_CLASS_SPEC { |
106 public: | |
107 u2 start_bci; | |
108 u2 length; | |
109 u2 name_cp_index; | |
110 u2 descriptor_cp_index; | |
111 u2 signature_cp_index; | |
112 u2 slot; | |
113 }; | |
114 | |
8031 | 115 // Utility class describing elements in exception table |
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116 class ExceptionTableElement VALUE_OBJ_CLASS_SPEC { |
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117 public: |
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118 u2 start_pc; |
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119 u2 end_pc; |
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120 u2 handler_pc; |
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121 u2 catch_type_index; |
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122 }; |
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123 |
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124 // Utility class describing elements in method parameters |
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125 class MethodParametersElement VALUE_OBJ_CLASS_SPEC { |
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126 public: |
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127 u2 name_cp_index; |
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128 u2 flags; |
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129 }; |
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130 |
7956 | 131 class KlassSizeStats; |
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132 |
8031 | 133 // Class to collect the sizes of ConstMethod inline tables |
134 #define INLINE_TABLES_DO(do_element) \ | |
135 do_element(localvariable_table_length) \ | |
136 do_element(compressed_linenumber_size) \ | |
137 do_element(exception_table_length) \ | |
138 do_element(checked_exceptions_length) \ | |
139 do_element(method_parameters_length) \ | |
140 do_element(generic_signature_index) \ | |
141 do_element(method_annotations_length) \ | |
142 do_element(parameter_annotations_length) \ | |
143 do_element(type_annotations_length) \ | |
144 do_element(default_annotations_length) | |
145 | |
146 #define INLINE_TABLE_DECLARE(sym) int _##sym; | |
147 #define INLINE_TABLE_PARAM(sym) int sym, | |
148 #define INLINE_TABLE_INIT(sym) _##sym(sym), | |
149 #define INLINE_TABLE_NULL(sym) _##sym(0), | |
150 #define INLINE_TABLE_ACCESSOR(sym) int sym() const { return _##sym; } | |
151 | |
152 class InlineTableSizes : StackObj { | |
153 // declarations | |
154 INLINE_TABLES_DO(INLINE_TABLE_DECLARE) | |
155 int _end; | |
156 public: | |
157 InlineTableSizes( | |
158 INLINE_TABLES_DO(INLINE_TABLE_PARAM) | |
159 int end) : | |
160 INLINE_TABLES_DO(INLINE_TABLE_INIT) | |
161 _end(end) {} | |
162 | |
163 // Default constructor for no inlined tables | |
164 InlineTableSizes() : | |
165 INLINE_TABLES_DO(INLINE_TABLE_NULL) | |
166 _end(0) {} | |
167 | |
168 // Accessors | |
169 INLINE_TABLES_DO(INLINE_TABLE_ACCESSOR) | |
170 }; | |
171 #undef INLINE_TABLE_ACCESSOR | |
172 #undef INLINE_TABLE_NULL | |
173 #undef INLINE_TABLE_INIT | |
174 #undef INLINE_TABLE_PARAM | |
175 #undef INLINE_TABLE_DECLARE | |
176 | |
177 | |
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178 class ConstMethod : public MetaspaceObj { |
0 | 179 friend class VMStructs; |
6934 | 180 |
181 public: | |
182 typedef enum { NORMAL, OVERPASS } MethodType; | |
183 | |
0 | 184 private: |
185 enum { | |
8031 | 186 _has_linenumber_table = 0x0001, |
187 _has_checked_exceptions = 0x0002, | |
188 _has_localvariable_table = 0x0004, | |
189 _has_exception_table = 0x0008, | |
190 _has_generic_signature = 0x0010, | |
191 _has_method_parameters = 0x0020, | |
192 _is_overpass = 0x0040, | |
193 _has_method_annotations = 0x0080, | |
194 _has_parameter_annotations = 0x0100, | |
195 _has_type_annotations = 0x0200, | |
196 _has_default_annotations = 0x0400 | |
0 | 197 }; |
198 | |
199 // Bit vector of signature | |
200 // Callers interpret 0=not initialized yet and | |
201 // -1=too many args to fix, must parse the slow way. | |
202 // The real initial value is special to account for nonatomicity of 64 bit | |
203 // loads and stores. This value may updated and read without a lock by | |
204 // multiple threads, so is volatile. | |
205 volatile uint64_t _fingerprint; | |
206 | |
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207 ConstantPool* _constants; // Constant pool |
0 | 208 |
209 // Raw stackmap data for the method | |
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210 Array<u1>* _stackmap_data; |
0 | 211 |
212 int _constMethod_size; | |
8031 | 213 u2 _flags; |
23614 | 214 u1 _result_type; // BasicType of result |
0 | 215 |
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216 // Size of Java bytecodes allocated immediately after Method*. |
0 | 217 u2 _code_size; |
218 u2 _name_index; // Method name (index in constant pool) | |
219 u2 _signature_index; // Method signature (index in constant pool) | |
220 u2 _method_idnum; // unique identification number for the method within the class | |
221 // initially corresponds to the index into the methods array. | |
222 // but this may change with redefinition | |
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223 u2 _max_stack; // Maximum number of entries on the expression stack |
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224 u2 _max_locals; // Number of local variables used by this method |
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225 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words |
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226 u2 _orig_method_idnum; // Original unique identification number for the method |
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227 |
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228 // Constructor |
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229 ConstMethod(int byte_code_size, |
8031 | 230 InlineTableSizes* sizes, |
6934 | 231 MethodType is_overpass, |
232 int size); | |
0 | 233 public: |
6934 | 234 |
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235 static ConstMethod* allocate(ClassLoaderData* loader_data, |
6934 | 236 int byte_code_size, |
8031 | 237 InlineTableSizes* sizes, |
6934 | 238 MethodType mt, |
239 TRAPS); | |
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240 |
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241 bool is_constMethod() const { return true; } |
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242 |
0 | 243 // Inlined tables |
8031 | 244 void set_inlined_tables_length(InlineTableSizes* sizes); |
0 | 245 |
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246 bool has_generic_signature() const |
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247 { return (_flags & _has_generic_signature) != 0; } |
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248 |
0 | 249 bool has_linenumber_table() const |
250 { return (_flags & _has_linenumber_table) != 0; } | |
251 | |
252 bool has_checked_exceptions() const | |
253 { return (_flags & _has_checked_exceptions) != 0; } | |
254 | |
255 bool has_localvariable_table() const | |
256 { return (_flags & _has_localvariable_table) != 0; } | |
257 | |
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258 bool has_exception_handler() const |
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259 { return (_flags & _has_exception_table) != 0; } |
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260 |
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261 bool has_method_parameters() const |
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262 { return (_flags & _has_method_parameters) != 0; } |
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263 |
6934 | 264 MethodType method_type() const { |
265 return ((_flags & _is_overpass) == 0) ? NORMAL : OVERPASS; | |
266 } | |
267 | |
268 void set_method_type(MethodType mt) { | |
269 if (mt == NORMAL) { | |
270 _flags &= ~(_is_overpass); | |
271 } else { | |
272 _flags |= _is_overpass; | |
273 } | |
274 } | |
275 | |
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276 // constant pool |
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277 ConstantPool* constants() const { return _constants; } |
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278 void set_constants(ConstantPool* c) { _constants = c; } |
0 | 279 |
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280 Method* method() const; |
0 | 281 |
282 // stackmap table data | |
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283 Array<u1>* stackmap_data() const { return _stackmap_data; } |
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284 void set_stackmap_data(Array<u1>* sd) { _stackmap_data = sd; } |
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285 void copy_stackmap_data(ClassLoaderData* loader_data, u1* sd, int length, TRAPS); |
0 | 286 bool has_stackmap_table() const { return _stackmap_data != NULL; } |
287 | |
288 void init_fingerprint() { | |
289 const uint64_t initval = CONST64(0x8000000000000000); | |
290 _fingerprint = initval; | |
291 } | |
292 | |
293 uint64_t fingerprint() const { | |
294 // Since reads aren't atomic for 64 bits, if any of the high or low order | |
295 // word is the initial value, return 0. See init_fingerprint for initval. | |
296 uint high_fp = (uint)(_fingerprint >> 32); | |
297 if ((int) _fingerprint == 0 || high_fp == 0x80000000) { | |
298 return 0L; | |
299 } else { | |
300 return _fingerprint; | |
301 } | |
302 } | |
303 | |
304 uint64_t set_fingerprint(uint64_t new_fingerprint) { | |
305 #ifdef ASSERT | |
306 // Assert only valid if complete/valid 64 bit _fingerprint value is read. | |
307 uint64_t oldfp = fingerprint(); | |
308 #endif // ASSERT | |
309 _fingerprint = new_fingerprint; | |
310 assert(oldfp == 0L || new_fingerprint == oldfp, | |
311 "fingerprint cannot change"); | |
312 assert(((new_fingerprint >> 32) != 0x80000000) && (int)new_fingerprint !=0, | |
313 "fingerprint should call init to set initial value"); | |
314 return new_fingerprint; | |
315 } | |
316 | |
317 // name | |
318 int name_index() const { return _name_index; } | |
319 void set_name_index(int index) { _name_index = index; } | |
320 | |
321 // signature | |
322 int signature_index() const { return _signature_index; } | |
323 void set_signature_index(int index) { _signature_index = index; } | |
324 | |
325 // generics support | |
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326 int generic_signature_index() const { |
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327 if (has_generic_signature()) { |
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328 return *generic_signature_index_addr(); |
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329 } else { |
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330 return 0; |
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331 } |
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332 } |
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333 void set_generic_signature_index(u2 index) { |
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334 assert(has_generic_signature(), ""); |
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335 u2* addr = generic_signature_index_addr(); |
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336 *addr = index; |
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337 } |
0 | 338 |
339 // Sizing | |
340 static int header_size() { | |
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341 return sizeof(ConstMethod)/HeapWordSize; |
0 | 342 } |
343 | |
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344 // Size needed |
8031 | 345 static int size(int code_size, InlineTableSizes* sizes); |
0 | 346 |
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347 int size() const { return _constMethod_size;} |
0 | 348 void set_constMethod_size(int size) { _constMethod_size = size; } |
7956 | 349 #if INCLUDE_SERVICES |
350 void collect_statistics(KlassSizeStats *sz) const; | |
351 #endif | |
0 | 352 |
353 // code size | |
354 int code_size() const { return _code_size; } | |
355 void set_code_size(int size) { | |
356 assert(max_method_code_size < (1 << 16), | |
357 "u2 is too small to hold method code size in general"); | |
358 assert(0 <= size && size <= max_method_code_size, "invalid code size"); | |
359 _code_size = size; | |
360 } | |
361 | |
362 // linenumber table - note that length is unknown until decompression, | |
363 // see class CompressedLineNumberReadStream. | |
364 u_char* compressed_linenumber_table() const; // not preserved by gc | |
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365 u2* generic_signature_index_addr() const; |
0 | 366 u2* checked_exceptions_length_addr() const; |
367 u2* localvariable_table_length_addr() const; | |
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368 u2* exception_table_length_addr() const; |
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369 u2* method_parameters_length_addr() const; |
0 | 370 |
371 // checked exceptions | |
372 int checked_exceptions_length() const; | |
373 CheckedExceptionElement* checked_exceptions_start() const; | |
374 | |
375 // localvariable table | |
376 int localvariable_table_length() const; | |
377 LocalVariableTableElement* localvariable_table_start() const; | |
378 | |
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379 // exception table |
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380 int exception_table_length() const; |
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381 ExceptionTableElement* exception_table_start() const; |
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382 |
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383 // method parameters table |
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384 int method_parameters_length() const; |
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385 MethodParametersElement* method_parameters_start() const; |
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386 |
8031 | 387 // method annotations |
388 bool has_method_annotations() const | |
389 { return (_flags & _has_method_annotations) != 0; } | |
390 | |
391 bool has_parameter_annotations() const | |
392 { return (_flags & _has_parameter_annotations) != 0; } | |
393 | |
394 bool has_type_annotations() const | |
395 { return (_flags & _has_type_annotations) != 0; } | |
396 | |
397 bool has_default_annotations() const | |
398 { return (_flags & _has_default_annotations) != 0; } | |
399 | |
400 | |
401 AnnotationArray** method_annotations_addr() const; | |
402 AnnotationArray* method_annotations() const { | |
403 return has_method_annotations() ? *(method_annotations_addr()) : NULL; | |
404 } | |
405 void set_method_annotations(AnnotationArray* anno) { | |
406 *(method_annotations_addr()) = anno; | |
407 } | |
408 | |
409 AnnotationArray** parameter_annotations_addr() const; | |
410 AnnotationArray* parameter_annotations() const { | |
411 return has_parameter_annotations() ? *(parameter_annotations_addr()) : NULL; | |
412 } | |
413 void set_parameter_annotations(AnnotationArray* anno) { | |
414 *(parameter_annotations_addr()) = anno; | |
415 } | |
416 | |
417 AnnotationArray** type_annotations_addr() const; | |
418 AnnotationArray* type_annotations() const { | |
419 return has_type_annotations() ? *(type_annotations_addr()) : NULL; | |
420 } | |
421 void set_type_annotations(AnnotationArray* anno) { | |
422 *(type_annotations_addr()) = anno; | |
423 } | |
424 | |
425 AnnotationArray** default_annotations_addr() const; | |
426 AnnotationArray* default_annotations() const { | |
427 return has_default_annotations() ? *(default_annotations_addr()) : NULL; | |
428 } | |
429 void set_default_annotations(AnnotationArray* anno) { | |
430 *(default_annotations_addr()) = anno; | |
431 } | |
432 | |
433 int method_annotations_length() const { | |
434 return has_method_annotations() ? method_annotations()->length() : 0; | |
435 } | |
436 int parameter_annotations_length() const { | |
437 return has_parameter_annotations() ? parameter_annotations()->length() : 0; | |
438 } | |
439 int type_annotations_length() const { | |
440 return has_type_annotations() ? type_annotations()->length() : 0; | |
441 } | |
442 int default_annotations_length() const { | |
443 return has_default_annotations() ? default_annotations()->length() : 0; | |
444 } | |
445 | |
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446 // Copy annotations from other ConstMethod |
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447 void copy_annotations_from(ConstMethod* cm); |
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448 |
0 | 449 // byte codes |
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450 void set_code(address code) { |
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451 if (code_size() > 0) { |
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452 memcpy(code_base(), code, code_size()); |
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453 } |
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454 } |
0 | 455 address code_base() const { return (address) (this+1); } |
456 address code_end() const { return code_base() + code_size(); } | |
457 bool contains(address bcp) const { return code_base() <= bcp | |
458 && bcp < code_end(); } | |
459 // Offset to bytecodes | |
460 static ByteSize codes_offset() | |
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461 { return in_ByteSize(sizeof(ConstMethod)); } |
0 | 462 |
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463 static ByteSize constants_offset() |
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464 { return byte_offset_of(ConstMethod, _constants); } |
0 | 465 |
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466 static ByteSize max_stack_offset() |
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467 { return byte_offset_of(ConstMethod, _max_stack); } |
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468 static ByteSize size_of_locals_offset() |
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469 { return byte_offset_of(ConstMethod, _max_locals); } |
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470 static ByteSize size_of_parameters_offset() |
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471 { return byte_offset_of(ConstMethod, _size_of_parameters); } |
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472 |
23614 | 473 static ByteSize result_type_offset() |
474 { return byte_offset_of(ConstMethod, _result_type); } | |
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475 |
0 | 476 // Unique id for the method |
477 static const u2 MAX_IDNUM; | |
478 static const u2 UNSET_IDNUM; | |
479 u2 method_idnum() const { return _method_idnum; } | |
480 void set_method_idnum(u2 idnum) { _method_idnum = idnum; } | |
481 | |
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482 u2 orig_method_idnum() const { return _orig_method_idnum; } |
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483 void set_orig_method_idnum(u2 idnum) { _orig_method_idnum = idnum; } |
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484 |
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485 // max stack |
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486 int max_stack() const { return _max_stack; } |
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487 void set_max_stack(int size) { _max_stack = size; } |
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488 |
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489 // max locals |
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490 int max_locals() const { return _max_locals; } |
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491 void set_max_locals(int size) { _max_locals = size; } |
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492 |
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493 // size of parameters |
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494 int size_of_parameters() const { return _size_of_parameters; } |
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495 void set_size_of_parameters(int size) { _size_of_parameters = size; } |
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496 |
23614 | 497 void set_result_type(BasicType rt) { assert(rt < 16, "result type too large"); |
498 _result_type = (u1)rt; } | |
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499 // Deallocation for RedefineClasses |
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500 void deallocate_contents(ClassLoaderData* loader_data); |
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501 bool is_klass() const { return false; } |
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502 DEBUG_ONLY(bool on_stack() { return false; }) |
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503 |
0 | 504 private: |
505 // Since the size of the compressed line number table is unknown, the | |
506 // offsets of the other variable sized sections are computed backwards | |
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507 // from the end of the ConstMethod*. |
0 | 508 |
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509 // First byte after ConstMethod* |
0 | 510 address constMethod_end() const |
8031 | 511 { return (address)((intptr_t*)this + _constMethod_size); } |
0 | 512 |
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513 // Last short in ConstMethod* |
8031 | 514 u2* last_u2_element() const; |
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515 |
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516 public: |
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517 // Printing |
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518 void print_on (outputStream* st) const; |
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519 void print_value_on(outputStream* st) const; |
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520 |
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521 const char* internal_name() const { return "{constMethod}"; } |
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522 |
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523 // Verify |
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524 void verify_on(outputStream* st); |
0 | 525 }; |
1972 | 526 |
527 #endif // SHARE_VM_OOPS_CONSTMETHODOOP_HPP |