Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciStreams.cpp @ 844:bd02caa94611
6862919: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 07/09
Reviewed-by: tbell, ohair
| author | xdono |
|---|---|
| date | Tue, 28 Jul 2009 12:12:40 -0700 |
| parents | be93aad57795 |
| children | e66fd840cb6b |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 844 | 2 * Copyright 1999-2009 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_ciStreams.cpp.incl" | |
| 27 | |
| 28 // ciExceptionHandlerStream | |
| 29 // | |
| 30 // Walk over some selected set of a methods exception handlers. | |
| 31 | |
| 32 // ------------------------------------------------------------------ | |
| 33 // ciExceptionHandlerStream::count | |
| 34 // | |
| 35 // How many exception handlers are there in this stream? | |
| 36 // | |
| 37 // Implementation note: Compiler2 needs this functionality, so I had | |
| 38 int ciExceptionHandlerStream::count() { | |
| 39 int save_pos = _pos; | |
| 40 int save_end = _end; | |
| 41 | |
| 42 int count = 0; | |
| 43 | |
| 44 _pos = -1; | |
| 45 _end = _method->_handler_count; | |
| 46 | |
| 47 | |
| 48 next(); | |
| 49 while (!is_done()) { | |
| 50 count++; | |
| 51 next(); | |
| 52 } | |
| 53 | |
| 54 _pos = save_pos; | |
| 55 _end = save_end; | |
| 56 | |
| 57 return count; | |
| 58 } | |
| 59 | |
| 60 int ciExceptionHandlerStream::count_remaining() { | |
| 61 int save_pos = _pos; | |
| 62 int save_end = _end; | |
| 63 | |
| 64 int count = 0; | |
| 65 | |
| 66 while (!is_done()) { | |
| 67 count++; | |
| 68 next(); | |
| 69 } | |
| 70 | |
| 71 _pos = save_pos; | |
| 72 _end = save_end; | |
| 73 | |
| 74 return count; | |
| 75 } | |
| 76 | |
| 77 // ciBytecodeStream | |
| 78 // | |
| 79 // The class is used to iterate over the bytecodes of a method. | |
| 80 // It hides the details of constant pool structure/access by | |
| 81 // providing accessors for constant pool items. | |
| 82 | |
| 83 // ------------------------------------------------------------------ | |
| 84 // ciBytecodeStream::wide | |
| 85 // | |
| 86 // Special handling for the wide bytcode | |
| 87 Bytecodes::Code ciBytecodeStream::wide() | |
| 88 { | |
| 89 // Get following bytecode; do not return wide | |
| 90 Bytecodes::Code bc = (Bytecodes::Code)_pc[1]; | |
| 91 _pc += 2; // Skip both bytecodes | |
| 92 _pc += 2; // Skip index always | |
| 93 if( bc == Bytecodes::_iinc ) | |
| 94 _pc += 2; // Skip optional constant | |
| 95 _was_wide = _pc; // Flag last wide bytecode found | |
| 96 return bc; | |
| 97 } | |
| 98 | |
| 99 // ------------------------------------------------------------------ | |
| 100 // ciBytecodeStream::table | |
| 101 // | |
| 102 // Special handling for switch ops | |
| 103 Bytecodes::Code ciBytecodeStream::table( Bytecodes::Code bc ) { | |
| 104 switch( bc ) { // Check for special bytecode handling | |
| 105 | |
| 106 case Bytecodes::_lookupswitch: | |
| 107 _pc++; // Skip wide bytecode | |
| 108 _pc += (_start-_pc)&3; // Word align | |
| 109 _table_base = (jint*)_pc; // Capture for later usage | |
| 110 // table_base[0] is default far_dest | |
| 111 // Table has 2 lead elements (default, length), then pairs of u4 values. | |
| 112 // So load table length, and compute address at end of table | |
| 113 _pc = (address)&_table_base[2+ 2*Bytes::get_Java_u4((address)&_table_base[1])]; | |
| 114 break; | |
| 115 | |
| 116 case Bytecodes::_tableswitch: { | |
| 117 _pc++; // Skip wide bytecode | |
| 118 _pc += (_start-_pc)&3; // Word align | |
| 119 _table_base = (jint*)_pc; // Capture for later usage | |
| 120 // table_base[0] is default far_dest | |
| 121 int lo = Bytes::get_Java_u4((address)&_table_base[1]);// Low bound | |
| 122 int hi = Bytes::get_Java_u4((address)&_table_base[2]);// High bound | |
| 123 int len = hi - lo + 1; // Dense table size | |
| 124 _pc = (address)&_table_base[3+len]; // Skip past table | |
| 125 break; | |
| 126 } | |
| 127 | |
| 128 default: | |
| 129 fatal("unhandled bytecode"); | |
| 130 } | |
| 131 return bc; | |
| 132 } | |
| 133 | |
| 134 // ------------------------------------------------------------------ | |
| 135 // ciBytecodeStream::reset_to_bci | |
| 136 void ciBytecodeStream::reset_to_bci( int bci ) { | |
| 137 _bc_start=_was_wide=0; | |
| 138 _pc = _start+bci; | |
| 139 } | |
| 140 | |
| 141 // ------------------------------------------------------------------ | |
| 142 // ciBytecodeStream::force_bci | |
| 143 void ciBytecodeStream::force_bci(int bci) { | |
| 144 if (bci < 0) { | |
| 145 reset_to_bci(0); | |
| 146 _bc_start = _start + bci; | |
| 147 _bc = EOBC(); | |
| 148 } else { | |
| 149 reset_to_bci(bci); | |
| 150 next(); | |
| 151 } | |
| 152 } | |
| 153 | |
| 154 | |
| 155 // ------------------------------------------------------------------ | |
| 156 // Constant pool access | |
| 157 // ------------------------------------------------------------------ | |
| 158 | |
| 159 // ------------------------------------------------------------------ | |
| 160 // ciBytecodeStream::get_klass_index | |
| 161 // | |
| 162 // If this bytecodes references a klass, return the index of the | |
| 163 // referenced klass. | |
| 164 int ciBytecodeStream::get_klass_index() const { | |
| 165 switch(cur_bc()) { | |
| 166 case Bytecodes::_ldc: | |
| 167 return get_index(); | |
| 168 case Bytecodes::_ldc_w: | |
| 169 case Bytecodes::_ldc2_w: | |
| 170 case Bytecodes::_checkcast: | |
| 171 case Bytecodes::_instanceof: | |
| 172 case Bytecodes::_anewarray: | |
| 173 case Bytecodes::_multianewarray: | |
| 174 case Bytecodes::_new: | |
| 175 case Bytecodes::_newarray: | |
| 176 return get_index_big(); | |
| 177 default: | |
| 178 ShouldNotReachHere(); | |
| 179 return 0; | |
| 180 } | |
| 181 } | |
| 182 | |
| 183 // ------------------------------------------------------------------ | |
| 184 // ciBytecodeStream::get_klass | |
| 185 // | |
| 186 // If this bytecode is a new, newarray, multianewarray, instanceof, | |
| 187 // or checkcast, get the referenced klass. | |
| 188 ciKlass* ciBytecodeStream::get_klass(bool& will_link) { | |
| 189 return CURRENT_ENV->get_klass_by_index(_holder, get_klass_index(), | |
| 190 will_link); | |
| 191 } | |
| 192 | |
| 193 // ------------------------------------------------------------------ | |
| 194 // ciBytecodeStream::get_constant_index | |
| 195 // | |
| 196 // If this bytecode is one of the ldc variants, get the index of the | |
| 197 // referenced constant. | |
| 198 int ciBytecodeStream::get_constant_index() const { | |
| 199 switch(cur_bc()) { | |
| 200 case Bytecodes::_ldc: | |
| 201 return get_index(); | |
| 202 case Bytecodes::_ldc_w: | |
| 203 case Bytecodes::_ldc2_w: | |
| 204 return get_index_big(); | |
| 205 default: | |
| 206 ShouldNotReachHere(); | |
| 207 return 0; | |
| 208 } | |
| 209 } | |
| 210 // ------------------------------------------------------------------ | |
| 211 // ciBytecodeStream::get_constant | |
| 212 // | |
| 213 // If this bytecode is one of the ldc variants, get the referenced | |
| 214 // constant. | |
| 215 ciConstant ciBytecodeStream::get_constant() { | |
| 216 return CURRENT_ENV->get_constant_by_index(_holder, get_constant_index()); | |
| 217 } | |
| 218 | |
| 219 // ------------------------------------------------------------------ | |
| 220 bool ciBytecodeStream::is_unresolved_string() const { | |
| 221 return CURRENT_ENV->is_unresolved_string(_holder, get_constant_index()); | |
| 222 } | |
| 223 | |
| 224 // ------------------------------------------------------------------ | |
| 225 bool ciBytecodeStream::is_unresolved_klass() const { | |
| 226 return CURRENT_ENV->is_unresolved_klass(_holder, get_klass_index()); | |
| 227 } | |
| 228 | |
| 229 // ------------------------------------------------------------------ | |
| 230 // ciBytecodeStream::get_field_index | |
| 231 // | |
| 232 // If this is a field access bytecode, get the constant pool | |
| 233 // index of the referenced field. | |
| 234 int ciBytecodeStream::get_field_index() { | |
| 235 assert(cur_bc() == Bytecodes::_getfield || | |
| 236 cur_bc() == Bytecodes::_putfield || | |
| 237 cur_bc() == Bytecodes::_getstatic || | |
| 238 cur_bc() == Bytecodes::_putstatic, "wrong bc"); | |
| 239 return get_index_big(); | |
| 240 } | |
| 241 | |
| 242 | |
| 243 // ------------------------------------------------------------------ | |
| 244 // ciBytecodeStream::get_field | |
| 245 // | |
| 246 // If this bytecode is one of get_field, get_static, put_field, | |
| 247 // or put_static, get the referenced field. | |
| 248 ciField* ciBytecodeStream::get_field(bool& will_link) { | |
| 249 ciField* f = CURRENT_ENV->get_field_by_index(_holder, get_field_index()); | |
| 250 will_link = f->will_link(_holder, _bc); | |
| 251 return f; | |
| 252 } | |
| 253 | |
| 254 | |
| 255 // ------------------------------------------------------------------ | |
| 256 // ciBytecodeStream::get_declared_field_holder | |
| 257 // | |
| 258 // Get the declared holder of the currently referenced field. | |
| 259 // | |
| 260 // Usage note: the holder() of a ciField class returns the canonical | |
| 261 // holder of the field, rather than the holder declared in the | |
| 262 // bytecodes. | |
| 263 // | |
| 264 // There is no "will_link" result passed back. The user is responsible | |
| 265 // for checking linkability when retrieving the associated field. | |
| 266 ciInstanceKlass* ciBytecodeStream::get_declared_field_holder() { | |
| 267 int holder_index = get_field_holder_index(); | |
| 268 bool ignore; | |
| 269 return CURRENT_ENV->get_klass_by_index(_holder, holder_index, ignore) | |
| 270 ->as_instance_klass(); | |
| 271 } | |
| 272 | |
| 273 // ------------------------------------------------------------------ | |
| 274 // ciBytecodeStream::get_field_holder_index | |
| 275 // | |
| 276 // Get the constant pool index of the declared holder of the field | |
| 277 // referenced by the current bytecode. Used for generating | |
| 278 // deoptimization information. | |
| 279 int ciBytecodeStream::get_field_holder_index() { | |
| 280 VM_ENTRY_MARK; | |
| 281 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
| 282 return cpool->klass_ref_index_at(get_field_index()); | |
| 283 } | |
| 284 | |
| 285 // ------------------------------------------------------------------ | |
| 286 // ciBytecodeStream::get_field_signature_index | |
| 287 // | |
| 288 // Get the constant pool index of the signature of the field | |
| 289 // referenced by the current bytecode. Used for generating | |
| 290 // deoptimization information. | |
| 291 int ciBytecodeStream::get_field_signature_index() { | |
| 292 VM_ENTRY_MARK; | |
| 293 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
| 294 int nt_index = cpool->name_and_type_ref_index_at(get_field_index()); | |
| 295 return cpool->signature_ref_index_at(nt_index); | |
| 296 } | |
| 297 | |
| 298 // ------------------------------------------------------------------ | |
| 299 // ciBytecodeStream::get_method_index | |
| 300 // | |
| 301 // If this is a method invocation bytecode, get the constant pool | |
| 302 // index of the invoked method. | |
| 303 int ciBytecodeStream::get_method_index() { | |
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304 #ifdef ASSERT |
| 0 | 305 switch (cur_bc()) { |
| 306 case Bytecodes::_invokeinterface: | |
| 307 case Bytecodes::_invokevirtual: | |
| 308 case Bytecodes::_invokespecial: | |
| 309 case Bytecodes::_invokestatic: | |
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310 case Bytecodes::_invokedynamic: |
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311 break; |
| 0 | 312 default: |
| 313 ShouldNotReachHere(); | |
| 314 } | |
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315 #endif |
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316 return get_index_int(); |
| 0 | 317 } |
| 318 | |
| 319 // ------------------------------------------------------------------ | |
| 320 // ciBytecodeStream::get_method | |
| 321 // | |
| 322 // If this is a method invocation bytecode, get the invoked method. | |
| 323 ciMethod* ciBytecodeStream::get_method(bool& will_link) { | |
| 324 ciMethod* m = CURRENT_ENV->get_method_by_index(_holder, get_method_index(),cur_bc()); | |
| 325 will_link = m->is_loaded(); | |
| 326 return m; | |
| 327 } | |
| 328 | |
| 329 // ------------------------------------------------------------------ | |
| 330 // ciBytecodeStream::get_declared_method_holder | |
| 331 // | |
| 332 // Get the declared holder of the currently referenced method. | |
| 333 // | |
| 334 // Usage note: the holder() of a ciMethod class returns the canonical | |
| 335 // holder of the method, rather than the holder declared in the | |
| 336 // bytecodes. | |
| 337 // | |
| 338 // There is no "will_link" result passed back. The user is responsible | |
| 339 // for checking linkability when retrieving the associated method. | |
| 340 ciKlass* ciBytecodeStream::get_declared_method_holder() { | |
| 341 bool ignore; | |
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342 // report as Dynamic for invokedynamic, which is syntactically classless |
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343 if (cur_bc() == Bytecodes::_invokedynamic) |
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344 return CURRENT_ENV->get_klass_by_name(_holder, ciSymbol::java_dyn_Dynamic(), false); |
| 0 | 345 return CURRENT_ENV->get_klass_by_index(_holder, get_method_holder_index(), ignore); |
| 346 } | |
| 347 | |
| 348 // ------------------------------------------------------------------ | |
| 349 // ciBytecodeStream::get_method_holder_index | |
| 350 // | |
| 351 // Get the constant pool index of the declared holder of the method | |
| 352 // referenced by the current bytecode. Used for generating | |
| 353 // deoptimization information. | |
| 354 int ciBytecodeStream::get_method_holder_index() { | |
| 355 VM_ENTRY_MARK; | |
| 356 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
| 357 return cpool->klass_ref_index_at(get_method_index()); | |
| 358 } | |
| 359 | |
| 360 // ------------------------------------------------------------------ | |
| 361 // ciBytecodeStream::get_method_signature_index | |
| 362 // | |
| 363 // Get the constant pool index of the signature of the method | |
| 364 // referenced by the current bytecode. Used for generating | |
| 365 // deoptimization information. | |
| 366 int ciBytecodeStream::get_method_signature_index() { | |
| 367 VM_ENTRY_MARK; | |
| 368 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
| 369 int method_index = get_method_index(); | |
| 370 int name_and_type_index = cpool->name_and_type_ref_index_at(method_index); | |
| 371 return cpool->signature_ref_index_at(name_and_type_index); | |
| 372 } |