Mercurial > hg > graal-compiler
annotate src/share/vm/ci/ciStreams.cpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
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| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | dd57230ba8fe |
| children | e9ff18c4ace7 |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1999, 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 #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) { | |
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189 VM_ENTRY_MARK; |
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190 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
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191 return CURRENT_ENV->get_klass_by_index(cpool, get_klass_index(), will_link, _holder); |
| 0 | 192 } |
| 193 | |
| 194 // ------------------------------------------------------------------ | |
| 195 // ciBytecodeStream::get_constant_index | |
| 196 // | |
| 197 // If this bytecode is one of the ldc variants, get the index of the | |
| 198 // referenced constant. | |
| 199 int ciBytecodeStream::get_constant_index() const { | |
| 200 switch(cur_bc()) { | |
| 201 case Bytecodes::_ldc: | |
| 202 return get_index(); | |
| 203 case Bytecodes::_ldc_w: | |
| 204 case Bytecodes::_ldc2_w: | |
| 205 return get_index_big(); | |
| 206 default: | |
| 207 ShouldNotReachHere(); | |
| 208 return 0; | |
| 209 } | |
| 210 } | |
| 211 // ------------------------------------------------------------------ | |
| 212 // ciBytecodeStream::get_constant | |
| 213 // | |
| 214 // If this bytecode is one of the ldc variants, get the referenced | |
| 215 // constant. | |
| 216 ciConstant ciBytecodeStream::get_constant() { | |
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217 VM_ENTRY_MARK; |
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218 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
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219 return CURRENT_ENV->get_constant_by_index(cpool, get_constant_index(), _holder); |
| 0 | 220 } |
| 221 | |
| 222 // ------------------------------------------------------------------ | |
| 223 bool ciBytecodeStream::is_unresolved_string() const { | |
| 224 return CURRENT_ENV->is_unresolved_string(_holder, get_constant_index()); | |
| 225 } | |
| 226 | |
| 227 // ------------------------------------------------------------------ | |
| 228 bool ciBytecodeStream::is_unresolved_klass() const { | |
| 229 return CURRENT_ENV->is_unresolved_klass(_holder, get_klass_index()); | |
| 230 } | |
| 231 | |
| 232 // ------------------------------------------------------------------ | |
| 233 // ciBytecodeStream::get_field_index | |
| 234 // | |
| 235 // If this is a field access bytecode, get the constant pool | |
| 236 // index of the referenced field. | |
| 237 int ciBytecodeStream::get_field_index() { | |
| 238 assert(cur_bc() == Bytecodes::_getfield || | |
| 239 cur_bc() == Bytecodes::_putfield || | |
| 240 cur_bc() == Bytecodes::_getstatic || | |
| 241 cur_bc() == Bytecodes::_putstatic, "wrong bc"); | |
| 242 return get_index_big(); | |
| 243 } | |
| 244 | |
| 245 | |
| 246 // ------------------------------------------------------------------ | |
| 247 // ciBytecodeStream::get_field | |
| 248 // | |
| 249 // If this bytecode is one of get_field, get_static, put_field, | |
| 250 // or put_static, get the referenced field. | |
| 251 ciField* ciBytecodeStream::get_field(bool& will_link) { | |
| 252 ciField* f = CURRENT_ENV->get_field_by_index(_holder, get_field_index()); | |
| 253 will_link = f->will_link(_holder, _bc); | |
| 254 return f; | |
| 255 } | |
| 256 | |
| 257 | |
| 258 // ------------------------------------------------------------------ | |
| 259 // ciBytecodeStream::get_declared_field_holder | |
| 260 // | |
| 261 // Get the declared holder of the currently referenced field. | |
| 262 // | |
| 263 // Usage note: the holder() of a ciField class returns the canonical | |
| 264 // holder of the field, rather than the holder declared in the | |
| 265 // bytecodes. | |
| 266 // | |
| 267 // There is no "will_link" result passed back. The user is responsible | |
| 268 // for checking linkability when retrieving the associated field. | |
| 269 ciInstanceKlass* ciBytecodeStream::get_declared_field_holder() { | |
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270 VM_ENTRY_MARK; |
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271 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
| 0 | 272 int holder_index = get_field_holder_index(); |
| 273 bool ignore; | |
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274 return CURRENT_ENV->get_klass_by_index(cpool, holder_index, ignore, _holder) |
| 0 | 275 ->as_instance_klass(); |
| 276 } | |
| 277 | |
| 278 // ------------------------------------------------------------------ | |
| 279 // ciBytecodeStream::get_field_holder_index | |
| 280 // | |
| 281 // Get the constant pool index of the declared holder of the field | |
| 282 // referenced by the current bytecode. Used for generating | |
| 283 // deoptimization information. | |
| 284 int ciBytecodeStream::get_field_holder_index() { | |
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285 GUARDED_VM_ENTRY( |
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286 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); |
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287 return cpool->klass_ref_index_at(get_field_index()); |
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288 ) |
| 0 | 289 } |
| 290 | |
| 291 // ------------------------------------------------------------------ | |
| 292 // ciBytecodeStream::get_field_signature_index | |
| 293 // | |
| 294 // Get the constant pool index of the signature of the field | |
| 295 // referenced by the current bytecode. Used for generating | |
| 296 // deoptimization information. | |
| 297 int ciBytecodeStream::get_field_signature_index() { | |
| 298 VM_ENTRY_MARK; | |
| 299 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
| 300 int nt_index = cpool->name_and_type_ref_index_at(get_field_index()); | |
| 301 return cpool->signature_ref_index_at(nt_index); | |
| 302 } | |
| 303 | |
| 304 // ------------------------------------------------------------------ | |
| 305 // ciBytecodeStream::get_method_index | |
| 306 // | |
| 307 // If this is a method invocation bytecode, get the constant pool | |
| 308 // index of the invoked method. | |
| 309 int ciBytecodeStream::get_method_index() { | |
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310 #ifdef ASSERT |
| 0 | 311 switch (cur_bc()) { |
| 312 case Bytecodes::_invokeinterface: | |
| 313 case Bytecodes::_invokevirtual: | |
| 314 case Bytecodes::_invokespecial: | |
| 315 case Bytecodes::_invokestatic: | |
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316 case Bytecodes::_invokedynamic: |
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317 break; |
| 0 | 318 default: |
| 319 ShouldNotReachHere(); | |
| 320 } | |
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321 #endif |
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322 return get_index_int(); |
| 0 | 323 } |
| 324 | |
| 325 // ------------------------------------------------------------------ | |
| 326 // ciBytecodeStream::get_method | |
| 327 // | |
| 328 // If this is a method invocation bytecode, get the invoked method. | |
| 329 ciMethod* ciBytecodeStream::get_method(bool& will_link) { | |
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330 VM_ENTRY_MARK; |
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331 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
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332 ciMethod* m = CURRENT_ENV->get_method_by_index(cpool, get_method_index(), cur_bc(), _holder); |
| 0 | 333 will_link = m->is_loaded(); |
| 334 return m; | |
| 335 } | |
| 336 | |
| 337 // ------------------------------------------------------------------ | |
| 338 // ciBytecodeStream::get_declared_method_holder | |
| 339 // | |
| 340 // Get the declared holder of the currently referenced method. | |
| 341 // | |
| 342 // Usage note: the holder() of a ciMethod class returns the canonical | |
| 343 // holder of the method, rather than the holder declared in the | |
| 344 // bytecodes. | |
| 345 // | |
| 346 // There is no "will_link" result passed back. The user is responsible | |
| 347 // for checking linkability when retrieving the associated method. | |
| 348 ciKlass* ciBytecodeStream::get_declared_method_holder() { | |
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349 VM_ENTRY_MARK; |
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350 constantPoolHandle cpool(_method->get_methodOop()->constants()); |
| 0 | 351 bool ignore; |
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352 // report as InvokeDynamic for invokedynamic, which is syntactically classless |
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353 if (cur_bc() == Bytecodes::_invokedynamic) |
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354 return CURRENT_ENV->get_klass_by_name(_holder, ciSymbol::java_dyn_InvokeDynamic(), false); |
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355 return CURRENT_ENV->get_klass_by_index(cpool, get_method_holder_index(), ignore, _holder); |
| 0 | 356 } |
| 357 | |
| 358 // ------------------------------------------------------------------ | |
| 359 // ciBytecodeStream::get_method_holder_index | |
| 360 // | |
| 361 // Get the constant pool index of the declared holder of the method | |
| 362 // referenced by the current bytecode. Used for generating | |
| 363 // deoptimization information. | |
| 364 int ciBytecodeStream::get_method_holder_index() { | |
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365 constantPoolOop cpool = _method->get_methodOop()->constants(); |
| 0 | 366 return cpool->klass_ref_index_at(get_method_index()); |
| 367 } | |
| 368 | |
| 369 // ------------------------------------------------------------------ | |
| 370 // ciBytecodeStream::get_method_signature_index | |
| 371 // | |
| 372 // Get the constant pool index of the signature of the method | |
| 373 // referenced by the current bytecode. Used for generating | |
| 374 // deoptimization information. | |
| 375 int ciBytecodeStream::get_method_signature_index() { | |
| 376 VM_ENTRY_MARK; | |
| 377 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); | |
| 378 int method_index = get_method_index(); | |
| 379 int name_and_type_index = cpool->name_and_type_ref_index_at(method_index); | |
| 380 return cpool->signature_ref_index_at(name_and_type_index); | |
| 381 } | |
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382 |
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383 // ------------------------------------------------------------------ |
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384 // ciBytecodeStream::get_cpcache |
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385 ciCPCache* ciBytecodeStream::get_cpcache() { |
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386 VM_ENTRY_MARK; |
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387 // Get the constant pool. |
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388 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); |
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389 constantPoolCacheOop cpcache = cpool->cache(); |
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390 |
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391 return CURRENT_ENV->get_object(cpcache)->as_cpcache(); |
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392 } |
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393 |
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394 // ------------------------------------------------------------------ |
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395 // ciBytecodeStream::get_call_site |
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396 ciCallSite* ciBytecodeStream::get_call_site() { |
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397 VM_ENTRY_MARK; |
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398 // Get the constant pool. |
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399 constantPoolOop cpool = _holder->get_instanceKlass()->constants(); |
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400 constantPoolCacheOop cpcache = cpool->cache(); |
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401 |
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402 // Get the CallSite from the constant pool cache. |
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403 int method_index = get_method_index(); |
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404 ConstantPoolCacheEntry* cpcache_entry = cpcache->secondary_entry_at(method_index); |
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405 oop call_site_oop = cpcache_entry->f1(); |
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406 |
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407 // Create a CallSite object and return it. |
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408 return CURRENT_ENV->get_object(call_site_oop)->as_call_site(); |
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409 } |