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annotate src/share/vm/interpreter/bytecode.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | dd57230ba8fe |
| children | e9ff18c4ace7 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2009, 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 | |
| 25 // Base class for different kinds of abstractions working | |
| 26 // relative to an objects 'this' pointer. | |
| 27 | |
| 28 class ThisRelativeObj VALUE_OBJ_CLASS_SPEC { | |
| 29 private: | |
| 30 int sign_extend (int x, int size) const { const int s = (BytesPerInt - size)*BitsPerByte; return (x << s) >> s; } | |
| 31 | |
| 32 public: | |
| 33 // Address computation | |
| 34 address addr_at (int offset) const { return (address)this + offset; } | |
| 35 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); } | |
| 36 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); } | |
| 37 | |
| 38 // Java unsigned accessors (using Java spec byte ordering) | |
| 39 int java_byte_at (int offset) const { return *(jubyte*)addr_at(offset); } | |
| 40 int java_hwrd_at (int offset) const { return java_byte_at(offset) << (1 * BitsPerByte) | java_byte_at(offset + 1); } | |
| 41 int java_word_at (int offset) const { return java_hwrd_at(offset) << (2 * BitsPerByte) | java_hwrd_at(offset + 2); } | |
| 42 | |
| 43 // Java signed accessors (using Java spec byte ordering) | |
| 44 int java_signed_byte_at(int offset) const { return sign_extend(java_byte_at(offset), 1); } | |
| 45 int java_signed_hwrd_at(int offset) const { return sign_extend(java_hwrd_at(offset), 2); } | |
| 46 int java_signed_word_at(int offset) const { return java_word_at(offset) ; } | |
| 47 | |
| 48 // Fast accessors (using the machine's natural byte ordering) | |
| 49 int fast_byte_at (int offset) const { return *(jubyte *)addr_at(offset); } | |
| 50 int fast_hwrd_at (int offset) const { return *(jushort*)addr_at(offset); } | |
| 51 int fast_word_at (int offset) const { return *(juint *)addr_at(offset); } | |
| 52 | |
| 53 // Fast signed accessors (using the machine's natural byte ordering) | |
| 54 int fast_signed_byte_at(int offset) const { return *(jbyte *)addr_at(offset); } | |
| 55 int fast_signed_hwrd_at(int offset) const { return *(jshort*)addr_at(offset); } | |
| 56 int fast_signed_word_at(int offset) const { return *(jint *)addr_at(offset); } | |
| 57 | |
| 58 // Fast manipulators (using the machine's natural byte ordering) | |
| 59 void set_fast_byte_at (int offset, int x) const { *(jbyte *)addr_at(offset) = (jbyte )x; } | |
| 60 void set_fast_hwrd_at (int offset, int x) const { *(jshort*)addr_at(offset) = (jshort)x; } | |
| 61 void set_fast_word_at (int offset, int x) const { *(jint *)addr_at(offset) = (jint )x; } | |
| 62 }; | |
| 63 | |
| 64 | |
| 65 // The base class for different kinds of bytecode abstractions. | |
| 66 // Provides the primitive operations to manipulate code relative | |
| 67 // to an objects 'this' pointer. | |
| 68 | |
| 69 class Bytecode: public ThisRelativeObj { | |
| 70 protected: | |
| 71 u_char byte_at(int offset) const { return *addr_at(offset); } | |
| 72 bool check_must_rewrite() const; | |
| 73 | |
| 74 public: | |
| 75 // Attributes | |
| 76 address bcp() const { return addr_at(0); } | |
| 77 address next_bcp() const { return addr_at(0) + Bytecodes::length_at(bcp()); } | |
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78 int instruction_size() const { return Bytecodes::length_at(bcp()); } |
| 0 | 79 |
| 80 Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); } | |
| 81 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); } | |
| 82 bool must_rewrite() const { return Bytecodes::can_rewrite(code()) && check_must_rewrite(); } | |
| 83 bool is_active_breakpoint() const { return Bytecodes::is_active_breakpoint_at(bcp()); } | |
| 84 | |
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85 int one_byte_index() const { assert_index_size(1); return byte_at(1); } |
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86 int two_byte_index() const { assert_index_size(2); return (byte_at(1) << 8) + byte_at(2); } |
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87 |
| 0 | 88 int offset() const { return (two_byte_index() << 16) >> 16; } |
| 89 address destination() const { return bcp() + offset(); } | |
| 90 | |
| 91 // Attribute modification | |
| 92 void set_code(Bytecodes::Code code); | |
| 93 | |
| 94 // Creation | |
| 95 inline friend Bytecode* Bytecode_at(address bcp); | |
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96 |
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97 private: |
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98 void assert_index_size(int required_size) const { |
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99 #ifdef ASSERT |
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100 int isize = instruction_size() - 1; |
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101 if (isize == 2 && code() == Bytecodes::_iinc) |
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102 isize = 1; |
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103 else if (isize <= 2) |
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104 ; // no change |
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105 else if (code() == Bytecodes::_invokedynamic) |
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106 isize = 4; |
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107 else |
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108 isize = 2; |
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109 assert(isize = required_size, "wrong index size"); |
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110 #endif |
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111 } |
| 0 | 112 }; |
| 113 | |
| 114 inline Bytecode* Bytecode_at(address bcp) { | |
| 115 return (Bytecode*)bcp; | |
| 116 } | |
| 117 | |
| 118 | |
| 119 // Abstractions for lookupswitch bytecode | |
| 120 | |
| 121 class LookupswitchPair: ThisRelativeObj { | |
| 122 private: | |
| 123 int _match; | |
| 124 int _offset; | |
| 125 | |
| 126 public: | |
| 127 int match() const { return java_signed_word_at(0 * jintSize); } | |
| 128 int offset() const { return java_signed_word_at(1 * jintSize); } | |
| 129 }; | |
| 130 | |
| 131 | |
| 132 class Bytecode_lookupswitch: public Bytecode { | |
| 133 public: | |
| 134 void verify() const PRODUCT_RETURN; | |
| 135 | |
| 136 // Attributes | |
| 137 int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } | |
| 138 int number_of_pairs() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } | |
| 139 LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds"); | |
| 140 return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); } | |
| 141 // Creation | |
| 142 inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp); | |
| 143 }; | |
| 144 | |
| 145 inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) { | |
| 146 Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp; | |
| 147 debug_only(b->verify()); | |
| 148 return b; | |
| 149 } | |
| 150 | |
| 151 | |
| 152 class Bytecode_tableswitch: public Bytecode { | |
| 153 public: | |
| 154 void verify() const PRODUCT_RETURN; | |
| 155 | |
| 156 // Attributes | |
| 157 int default_offset() const { return java_signed_word_at(aligned_offset(1 + 0*jintSize)); } | |
| 158 int low_key() const { return java_signed_word_at(aligned_offset(1 + 1*jintSize)); } | |
| 159 int high_key() const { return java_signed_word_at(aligned_offset(1 + 2*jintSize)); } | |
| 160 int dest_offset_at(int i) const; | |
| 161 int length() { return high_key()-low_key()+1; } | |
| 162 | |
| 163 // Creation | |
| 164 inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp); | |
| 165 }; | |
| 166 | |
| 167 inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) { | |
| 168 Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp; | |
| 169 debug_only(b->verify()); | |
| 170 return b; | |
| 171 } | |
| 172 | |
| 173 | |
| 174 // Abstraction for invoke_{virtual, static, interface, special} | |
| 175 | |
| 176 class Bytecode_invoke: public ResourceObj { | |
| 177 protected: | |
| 178 methodHandle _method; // method containing the bytecode | |
| 179 int _bci; // position of the bytecode | |
| 180 | |
| 181 Bytecode_invoke(methodHandle method, int bci) : _method(method), _bci(bci) {} | |
| 182 | |
| 183 public: | |
| 184 void verify() const; | |
| 185 | |
| 186 // Attributes | |
| 187 methodHandle method() const { return _method; } | |
| 188 int bci() const { return _bci; } | |
| 189 address bcp() const { return _method->bcp_from(bci()); } | |
| 190 | |
| 191 int index() const; // the constant pool index for the invoke | |
| 192 symbolOop name() const; // returns the name of the invoked method | |
| 193 symbolOop signature() const; // returns the signature of the invoked method | |
| 194 BasicType result_type(Thread *thread) const; // returns the result type of the invoke | |
| 195 | |
| 196 Bytecodes::Code code() const { return Bytecodes::code_at(bcp(), _method()); } | |
| 197 Bytecodes::Code adjusted_invoke_code() const { return Bytecodes::java_code(code()); } | |
| 198 | |
| 199 methodHandle static_target(TRAPS); // "specified" method (from constant pool) | |
| 200 | |
| 201 // Testers | |
| 202 bool is_invokeinterface() const { return adjusted_invoke_code() == Bytecodes::_invokeinterface; } | |
| 203 bool is_invokevirtual() const { return adjusted_invoke_code() == Bytecodes::_invokevirtual; } | |
| 204 bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; } | |
| 205 bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; } | |
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206 bool is_invokedynamic() const { return adjusted_invoke_code() == Bytecodes::_invokedynamic; } |
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207 |
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208 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); } |
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209 bool has_giant_index() const { return is_invokedynamic(); } |
| 0 | 210 |
| 211 bool is_valid() const { return is_invokeinterface() || | |
| 212 is_invokevirtual() || | |
| 213 is_invokestatic() || | |
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214 is_invokespecial() || |
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215 is_invokedynamic(); } |
| 0 | 216 |
| 217 // Creation | |
| 218 inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci); | |
| 219 | |
| 220 // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke. | |
| 221 inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci); | |
| 222 }; | |
| 223 | |
| 224 inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) { | |
| 225 Bytecode_invoke* b = new Bytecode_invoke(method, bci); | |
| 226 debug_only(b->verify()); | |
| 227 return b; | |
| 228 } | |
| 229 | |
| 230 inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) { | |
| 231 Bytecode_invoke* b = new Bytecode_invoke(method, bci); | |
| 232 return b->is_valid() ? b : NULL; | |
| 233 } | |
| 234 | |
| 235 | |
| 236 // Abstraction for all field accesses (put/get field/static_ | |
| 237 class Bytecode_field: public Bytecode { | |
| 238 public: | |
| 239 void verify() const; | |
| 240 | |
| 241 int index() const; | |
| 242 bool is_static() const; | |
| 243 | |
| 244 // Creation | |
| 245 inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp); | |
| 246 }; | |
| 247 | |
| 248 inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) { | |
| 249 Bytecode_field* b = (Bytecode_field*)bcp; | |
| 250 debug_only(b->verify()); | |
| 251 return b; | |
| 252 } | |
| 253 | |
| 254 | |
| 255 // Abstraction for {get,put}static | |
| 256 | |
| 257 class Bytecode_static: public Bytecode { | |
| 258 public: | |
| 259 void verify() const; | |
| 260 | |
| 261 // Returns the result type of the send by inspecting the field ref | |
| 262 BasicType result_type(methodOop method) const; | |
| 263 | |
| 264 // Creation | |
| 265 inline friend Bytecode_static* Bytecode_static_at(const methodOop method, address bcp); | |
| 266 }; | |
| 267 | |
| 268 inline Bytecode_static* Bytecode_static_at(const methodOop method, address bcp) { | |
| 269 Bytecode_static* b = (Bytecode_static*)bcp; | |
| 270 debug_only(b->verify()); | |
| 271 return b; | |
| 272 } | |
| 273 | |
| 274 | |
| 275 // Abstraction for checkcast | |
| 276 | |
| 277 class Bytecode_checkcast: public Bytecode { | |
| 278 public: | |
| 279 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); } | |
| 280 | |
| 281 // Returns index | |
| 282 long index() const { return java_hwrd_at(1); }; | |
| 283 | |
| 284 // Creation | |
| 285 inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp); | |
| 286 }; | |
| 287 | |
| 288 inline Bytecode_checkcast* Bytecode_checkcast_at(address bcp) { | |
| 289 Bytecode_checkcast* b = (Bytecode_checkcast*)bcp; | |
| 290 debug_only(b->verify()); | |
| 291 return b; | |
| 292 } | |
| 293 | |
| 294 | |
| 295 // Abstraction for instanceof | |
| 296 | |
| 297 class Bytecode_instanceof: public Bytecode { | |
| 298 public: | |
| 299 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); } | |
| 300 | |
| 301 // Returns index | |
| 302 long index() const { return java_hwrd_at(1); }; | |
| 303 | |
| 304 // Creation | |
| 305 inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp); | |
| 306 }; | |
| 307 | |
| 308 inline Bytecode_instanceof* Bytecode_instanceof_at(address bcp) { | |
| 309 Bytecode_instanceof* b = (Bytecode_instanceof*)bcp; | |
| 310 debug_only(b->verify()); | |
| 311 return b; | |
| 312 } | |
| 313 | |
| 314 | |
| 315 class Bytecode_new: public Bytecode { | |
| 316 public: | |
| 317 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); } | |
| 318 | |
| 319 // Returns index | |
| 320 long index() const { return java_hwrd_at(1); }; | |
| 321 | |
| 322 // Creation | |
| 323 inline friend Bytecode_new* Bytecode_new_at(address bcp); | |
| 324 }; | |
| 325 | |
| 326 inline Bytecode_new* Bytecode_new_at(address bcp) { | |
| 327 Bytecode_new* b = (Bytecode_new*)bcp; | |
| 328 debug_only(b->verify()); | |
| 329 return b; | |
| 330 } | |
| 331 | |
| 332 | |
| 333 class Bytecode_multianewarray: public Bytecode { | |
| 334 public: | |
| 335 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); } | |
| 336 | |
| 337 // Returns index | |
| 338 long index() const { return java_hwrd_at(1); }; | |
| 339 | |
| 340 // Creation | |
| 341 inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp); | |
| 342 }; | |
| 343 | |
| 344 inline Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp) { | |
| 345 Bytecode_multianewarray* b = (Bytecode_multianewarray*)bcp; | |
| 346 debug_only(b->verify()); | |
| 347 return b; | |
| 348 } | |
| 349 | |
| 350 | |
| 351 class Bytecode_anewarray: public Bytecode { | |
| 352 public: | |
| 353 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); } | |
| 354 | |
| 355 // Returns index | |
| 356 long index() const { return java_hwrd_at(1); }; | |
| 357 | |
| 358 // Creation | |
| 359 inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp); | |
| 360 }; | |
| 361 | |
| 362 inline Bytecode_anewarray* Bytecode_anewarray_at(address bcp) { | |
| 363 Bytecode_anewarray* b = (Bytecode_anewarray*)bcp; | |
| 364 debug_only(b->verify()); | |
| 365 return b; | |
| 366 } | |
| 367 | |
| 368 | |
| 369 // Abstraction for ldc, ldc_w and ldc2_w | |
| 370 | |
| 371 class Bytecode_loadconstant: public Bytecode { | |
| 372 public: | |
| 373 void verify() const { | |
| 374 Bytecodes::Code stdc = Bytecodes::java_code(code()); | |
| 375 assert(stdc == Bytecodes::_ldc || | |
| 376 stdc == Bytecodes::_ldc_w || | |
| 377 stdc == Bytecodes::_ldc2_w, "load constant"); | |
| 378 } | |
| 379 | |
| 380 int index() const; | |
| 381 | |
| 382 inline friend Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp); | |
| 383 }; | |
| 384 | |
| 385 inline Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp) { | |
| 386 Bytecode_loadconstant* b = (Bytecode_loadconstant*)bcp; | |
| 387 debug_only(b->verify()); | |
| 388 return b; | |
| 389 } |