Mercurial > hg > truffle
annotate src/share/vm/oops/constMethod.hpp @ 13212:eb03a7335eb0
Use fixed instead of virtual register for target in far foreign call, since the register allocator does not support virtual registers to be used at call sites.
| author | Christian Wimmer <christian.wimmer@oracle.com> |
|---|---|
| date | Mon, 02 Dec 2013 14:20:32 -0800 |
| parents | 0c3ee6f1fa23 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 7956 | 2 * Copyright (c) 2003, 2013, 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; |
| 0 | 214 |
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215 // Size of Java bytecodes allocated immediately after Method*. |
| 0 | 216 u2 _code_size; |
| 217 u2 _name_index; // Method name (index in constant pool) | |
| 218 u2 _signature_index; // Method signature (index in constant pool) | |
| 219 u2 _method_idnum; // unique identification number for the method within the class | |
| 220 // initially corresponds to the index into the methods array. | |
| 221 // but this may change with redefinition | |
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222 u2 _max_stack; // Maximum number of entries on the expression stack |
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223 u2 _max_locals; // Number of local variables used by this method |
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224 u2 _size_of_parameters; // size of the parameter block (receiver + arguments) in words |
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225 |
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226 // Constructor |
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227 ConstMethod(int byte_code_size, |
| 8031 | 228 InlineTableSizes* sizes, |
| 6934 | 229 MethodType is_overpass, |
| 230 int size); | |
| 0 | 231 public: |
| 6934 | 232 |
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233 static ConstMethod* allocate(ClassLoaderData* loader_data, |
| 6934 | 234 int byte_code_size, |
| 8031 | 235 InlineTableSizes* sizes, |
| 6934 | 236 MethodType mt, |
| 237 TRAPS); | |
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238 |
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239 bool is_constMethod() const { return true; } |
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240 |
| 0 | 241 // Inlined tables |
| 8031 | 242 void set_inlined_tables_length(InlineTableSizes* sizes); |
| 0 | 243 |
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244 bool has_generic_signature() const |
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245 { return (_flags & _has_generic_signature) != 0; } |
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246 |
| 0 | 247 bool has_linenumber_table() const |
| 248 { return (_flags & _has_linenumber_table) != 0; } | |
| 249 | |
| 250 bool has_checked_exceptions() const | |
| 251 { return (_flags & _has_checked_exceptions) != 0; } | |
| 252 | |
| 253 bool has_localvariable_table() const | |
| 254 { return (_flags & _has_localvariable_table) != 0; } | |
| 255 | |
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256 bool has_exception_handler() const |
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257 { return (_flags & _has_exception_table) != 0; } |
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258 |
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259 bool has_method_parameters() const |
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260 { return (_flags & _has_method_parameters) != 0; } |
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261 |
| 6934 | 262 MethodType method_type() const { |
| 263 return ((_flags & _is_overpass) == 0) ? NORMAL : OVERPASS; | |
| 264 } | |
| 265 | |
| 266 void set_method_type(MethodType mt) { | |
| 267 if (mt == NORMAL) { | |
| 268 _flags &= ~(_is_overpass); | |
| 269 } else { | |
| 270 _flags |= _is_overpass; | |
| 271 } | |
| 272 } | |
| 273 | |
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274 // constant pool |
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275 ConstantPool* constants() const { return _constants; } |
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276 void set_constants(ConstantPool* c) { _constants = c; } |
| 0 | 277 |
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278 Method* method() const; |
| 0 | 279 |
| 280 // stackmap table data | |
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281 Array<u1>* stackmap_data() const { return _stackmap_data; } |
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282 void set_stackmap_data(Array<u1>* sd) { _stackmap_data = sd; } |
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283 void copy_stackmap_data(ClassLoaderData* loader_data, u1* sd, int length, TRAPS); |
| 0 | 284 bool has_stackmap_table() const { return _stackmap_data != NULL; } |
| 285 | |
| 286 void init_fingerprint() { | |
| 287 const uint64_t initval = CONST64(0x8000000000000000); | |
| 288 _fingerprint = initval; | |
| 289 } | |
| 290 | |
| 291 uint64_t fingerprint() const { | |
| 292 // Since reads aren't atomic for 64 bits, if any of the high or low order | |
| 293 // word is the initial value, return 0. See init_fingerprint for initval. | |
| 294 uint high_fp = (uint)(_fingerprint >> 32); | |
| 295 if ((int) _fingerprint == 0 || high_fp == 0x80000000) { | |
| 296 return 0L; | |
| 297 } else { | |
| 298 return _fingerprint; | |
| 299 } | |
| 300 } | |
| 301 | |
| 302 uint64_t set_fingerprint(uint64_t new_fingerprint) { | |
| 303 #ifdef ASSERT | |
| 304 // Assert only valid if complete/valid 64 bit _fingerprint value is read. | |
| 305 uint64_t oldfp = fingerprint(); | |
| 306 #endif // ASSERT | |
| 307 _fingerprint = new_fingerprint; | |
| 308 assert(oldfp == 0L || new_fingerprint == oldfp, | |
| 309 "fingerprint cannot change"); | |
| 310 assert(((new_fingerprint >> 32) != 0x80000000) && (int)new_fingerprint !=0, | |
| 311 "fingerprint should call init to set initial value"); | |
| 312 return new_fingerprint; | |
| 313 } | |
| 314 | |
| 315 // name | |
| 316 int name_index() const { return _name_index; } | |
| 317 void set_name_index(int index) { _name_index = index; } | |
| 318 | |
| 319 // signature | |
| 320 int signature_index() const { return _signature_index; } | |
| 321 void set_signature_index(int index) { _signature_index = index; } | |
| 322 | |
| 323 // generics support | |
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324 int generic_signature_index() const { |
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325 if (has_generic_signature()) { |
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326 return *generic_signature_index_addr(); |
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327 } else { |
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328 return 0; |
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329 } |
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330 } |
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331 void set_generic_signature_index(u2 index) { |
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332 assert(has_generic_signature(), ""); |
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333 u2* addr = generic_signature_index_addr(); |
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334 *addr = index; |
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335 } |
| 0 | 336 |
| 337 // Sizing | |
| 338 static int header_size() { | |
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339 return sizeof(ConstMethod)/HeapWordSize; |
| 0 | 340 } |
| 341 | |
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342 // Size needed |
| 8031 | 343 static int size(int code_size, InlineTableSizes* sizes); |
| 0 | 344 |
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345 int size() const { return _constMethod_size;} |
| 0 | 346 void set_constMethod_size(int size) { _constMethod_size = size; } |
| 7956 | 347 #if INCLUDE_SERVICES |
| 348 void collect_statistics(KlassSizeStats *sz) const; | |
| 349 #endif | |
| 0 | 350 |
| 351 // code size | |
| 352 int code_size() const { return _code_size; } | |
| 353 void set_code_size(int size) { | |
| 354 assert(max_method_code_size < (1 << 16), | |
| 355 "u2 is too small to hold method code size in general"); | |
| 356 assert(0 <= size && size <= max_method_code_size, "invalid code size"); | |
| 357 _code_size = size; | |
| 358 } | |
| 359 | |
| 360 // linenumber table - note that length is unknown until decompression, | |
| 361 // see class CompressedLineNumberReadStream. | |
| 362 u_char* compressed_linenumber_table() const; // not preserved by gc | |
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363 u2* generic_signature_index_addr() const; |
| 0 | 364 u2* checked_exceptions_length_addr() const; |
| 365 u2* localvariable_table_length_addr() const; | |
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366 u2* exception_table_length_addr() const; |
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367 u2* method_parameters_length_addr() const; |
| 0 | 368 |
| 369 // checked exceptions | |
| 370 int checked_exceptions_length() const; | |
| 371 CheckedExceptionElement* checked_exceptions_start() const; | |
| 372 | |
| 373 // localvariable table | |
| 374 int localvariable_table_length() const; | |
| 375 LocalVariableTableElement* localvariable_table_start() const; | |
| 376 | |
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377 // exception table |
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378 int exception_table_length() const; |
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379 ExceptionTableElement* exception_table_start() const; |
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380 |
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381 // method parameters table |
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382 int method_parameters_length() const; |
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383 MethodParametersElement* method_parameters_start() const; |
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384 |
| 8031 | 385 // method annotations |
| 386 bool has_method_annotations() const | |
| 387 { return (_flags & _has_method_annotations) != 0; } | |
| 388 | |
| 389 bool has_parameter_annotations() const | |
| 390 { return (_flags & _has_parameter_annotations) != 0; } | |
| 391 | |
| 392 bool has_type_annotations() const | |
| 393 { return (_flags & _has_type_annotations) != 0; } | |
| 394 | |
| 395 bool has_default_annotations() const | |
| 396 { return (_flags & _has_default_annotations) != 0; } | |
| 397 | |
| 398 | |
| 399 AnnotationArray** method_annotations_addr() const; | |
| 400 AnnotationArray* method_annotations() const { | |
| 401 return has_method_annotations() ? *(method_annotations_addr()) : NULL; | |
| 402 } | |
| 403 void set_method_annotations(AnnotationArray* anno) { | |
| 404 *(method_annotations_addr()) = anno; | |
| 405 } | |
| 406 | |
| 407 AnnotationArray** parameter_annotations_addr() const; | |
| 408 AnnotationArray* parameter_annotations() const { | |
| 409 return has_parameter_annotations() ? *(parameter_annotations_addr()) : NULL; | |
| 410 } | |
| 411 void set_parameter_annotations(AnnotationArray* anno) { | |
| 412 *(parameter_annotations_addr()) = anno; | |
| 413 } | |
| 414 | |
| 415 AnnotationArray** type_annotations_addr() const; | |
| 416 AnnotationArray* type_annotations() const { | |
| 417 return has_type_annotations() ? *(type_annotations_addr()) : NULL; | |
| 418 } | |
| 419 void set_type_annotations(AnnotationArray* anno) { | |
| 420 *(type_annotations_addr()) = anno; | |
| 421 } | |
| 422 | |
| 423 AnnotationArray** default_annotations_addr() const; | |
| 424 AnnotationArray* default_annotations() const { | |
| 425 return has_default_annotations() ? *(default_annotations_addr()) : NULL; | |
| 426 } | |
| 427 void set_default_annotations(AnnotationArray* anno) { | |
| 428 *(default_annotations_addr()) = anno; | |
| 429 } | |
| 430 | |
| 431 int method_annotations_length() const { | |
| 432 return has_method_annotations() ? method_annotations()->length() : 0; | |
| 433 } | |
| 434 int parameter_annotations_length() const { | |
| 435 return has_parameter_annotations() ? parameter_annotations()->length() : 0; | |
| 436 } | |
| 437 int type_annotations_length() const { | |
| 438 return has_type_annotations() ? type_annotations()->length() : 0; | |
| 439 } | |
| 440 int default_annotations_length() const { | |
| 441 return has_default_annotations() ? default_annotations()->length() : 0; | |
| 442 } | |
| 443 | |
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444 // Copy annotations from other ConstMethod |
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445 void copy_annotations_from(ConstMethod* cm); |
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446 |
| 0 | 447 // byte codes |
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448 void set_code(address code) { |
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449 if (code_size() > 0) { |
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450 memcpy(code_base(), code, code_size()); |
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451 } |
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452 } |
| 0 | 453 address code_base() const { return (address) (this+1); } |
| 454 address code_end() const { return code_base() + code_size(); } | |
| 455 bool contains(address bcp) const { return code_base() <= bcp | |
| 456 && bcp < code_end(); } | |
| 457 // Offset to bytecodes | |
| 458 static ByteSize codes_offset() | |
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459 { return in_ByteSize(sizeof(ConstMethod)); } |
| 0 | 460 |
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461 static ByteSize constants_offset() |
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462 { return byte_offset_of(ConstMethod, _constants); } |
| 0 | 463 |
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464 static ByteSize max_stack_offset() |
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465 { return byte_offset_of(ConstMethod, _max_stack); } |
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466 static ByteSize size_of_locals_offset() |
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467 { return byte_offset_of(ConstMethod, _max_locals); } |
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468 static ByteSize size_of_parameters_offset() |
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469 { return byte_offset_of(ConstMethod, _size_of_parameters); } |
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470 |
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471 |
| 0 | 472 // Unique id for the method |
| 473 static const u2 MAX_IDNUM; | |
| 474 static const u2 UNSET_IDNUM; | |
| 475 u2 method_idnum() const { return _method_idnum; } | |
| 476 void set_method_idnum(u2 idnum) { _method_idnum = idnum; } | |
| 477 | |
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478 // max stack |
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479 int max_stack() const { return _max_stack; } |
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480 void set_max_stack(int size) { _max_stack = size; } |
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481 |
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482 // max locals |
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483 int max_locals() const { return _max_locals; } |
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484 void set_max_locals(int size) { _max_locals = size; } |
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485 |
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486 // size of parameters |
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487 int size_of_parameters() const { return _size_of_parameters; } |
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488 void set_size_of_parameters(int size) { _size_of_parameters = size; } |
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489 |
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490 // Deallocation for RedefineClasses |
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491 void deallocate_contents(ClassLoaderData* loader_data); |
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492 bool is_klass() const { return false; } |
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493 DEBUG_ONLY(bool on_stack() { return false; }) |
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494 |
| 0 | 495 private: |
| 496 // Since the size of the compressed line number table is unknown, the | |
| 497 // offsets of the other variable sized sections are computed backwards | |
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498 // from the end of the ConstMethod*. |
| 0 | 499 |
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500 // First byte after ConstMethod* |
| 0 | 501 address constMethod_end() const |
| 8031 | 502 { return (address)((intptr_t*)this + _constMethod_size); } |
| 0 | 503 |
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504 // Last short in ConstMethod* |
| 8031 | 505 u2* last_u2_element() const; |
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506 |
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507 public: |
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508 // Printing |
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509 void print_on (outputStream* st) const; |
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510 void print_value_on(outputStream* st) const; |
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511 |
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512 const char* internal_name() const { return "{constMethod}"; } |
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513 |
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514 // Verify |
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515 void verify_on(outputStream* st); |
| 0 | 516 }; |
| 1972 | 517 |
| 518 #endif // SHARE_VM_OOPS_CONSTMETHODOOP_HPP |