Mercurial > hg > truffle
annotate src/share/vm/c1/c1_CodeStubs.hpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 09aad8452938 |
| children | db9981fd3124 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 1999, 2012, 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_C1_C1_CODESTUBS_HPP |
| 26 #define SHARE_VM_C1_C1_CODESTUBS_HPP | |
| 27 | |
| 28 #include "c1/c1_FrameMap.hpp" | |
| 29 #include "c1/c1_IR.hpp" | |
| 30 #include "c1/c1_Instruction.hpp" | |
| 31 #include "c1/c1_LIR.hpp" | |
| 32 #include "c1/c1_Runtime1.hpp" | |
| 33 #include "utilities/array.hpp" | |
| 34 | |
| 0 | 35 class CodeEmitInfo; |
| 36 class LIR_Assembler; | |
| 37 class LIR_OpVisitState; | |
| 38 | |
| 39 // CodeStubs are little 'out-of-line' pieces of code that | |
| 40 // usually handle slow cases of operations. All code stubs | |
| 41 // are collected and code is emitted at the end of the | |
| 42 // nmethod. | |
| 43 | |
| 44 class CodeStub: public CompilationResourceObj { | |
| 45 protected: | |
| 46 Label _entry; // label at the stub entry point | |
| 47 Label _continuation; // label where stub continues, if any | |
| 48 | |
| 49 public: | |
| 50 CodeStub() {} | |
| 51 | |
| 52 // code generation | |
| 53 void assert_no_unbound_labels() { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); } | |
| 54 virtual void emit_code(LIR_Assembler* e) = 0; | |
| 55 virtual CodeEmitInfo* info() const { return NULL; } | |
| 56 virtual bool is_exception_throw_stub() const { return false; } | |
| 57 virtual bool is_range_check_stub() const { return false; } | |
| 58 virtual bool is_divbyzero_stub() const { return false; } | |
| 59 #ifndef PRODUCT | |
| 60 virtual void print_name(outputStream* out) const = 0; | |
| 61 #endif | |
| 62 | |
| 63 // label access | |
| 64 Label* entry() { return &_entry; } | |
| 65 Label* continuation() { return &_continuation; } | |
| 66 // for LIR | |
| 67 virtual void visit(LIR_OpVisitState* visit) { | |
| 68 #ifndef PRODUCT | |
| 69 if (LIRTracePeephole && Verbose) { | |
| 70 tty->print("no visitor for "); | |
| 71 print_name(tty); | |
| 72 tty->cr(); | |
| 73 } | |
| 74 #endif | |
| 75 } | |
| 76 }; | |
| 77 | |
| 78 | |
| 79 define_array(CodeStubArray, CodeStub*) | |
| 80 define_stack(_CodeStubList, CodeStubArray) | |
| 81 | |
| 82 class CodeStubList: public _CodeStubList { | |
| 83 public: | |
| 84 CodeStubList(): _CodeStubList() {} | |
| 85 | |
| 86 void append(CodeStub* stub) { | |
| 87 if (!contains(stub)) { | |
| 88 _CodeStubList::append(stub); | |
| 89 } | |
| 90 } | |
| 91 }; | |
| 92 | |
| 93 class CounterOverflowStub: public CodeStub { | |
| 94 private: | |
| 95 CodeEmitInfo* _info; | |
| 96 int _bci; | |
| 1783 | 97 LIR_Opr _method; |
| 0 | 98 |
| 99 public: | |
| 1783 | 100 CounterOverflowStub(CodeEmitInfo* info, int bci, LIR_Opr method) : _info(info), _bci(bci), _method(method) { |
| 0 | 101 } |
| 102 | |
| 103 virtual void emit_code(LIR_Assembler* e); | |
| 104 | |
| 105 virtual void visit(LIR_OpVisitState* visitor) { | |
| 106 visitor->do_slow_case(_info); | |
| 1783 | 107 visitor->do_input(_method); |
| 0 | 108 } |
| 109 | |
| 110 #ifndef PRODUCT | |
| 111 virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); } | |
| 112 #endif // PRODUCT | |
| 113 | |
| 114 }; | |
| 115 | |
| 116 class ConversionStub: public CodeStub { | |
| 117 private: | |
| 118 Bytecodes::Code _bytecode; | |
| 119 LIR_Opr _input; | |
| 120 LIR_Opr _result; | |
| 121 | |
| 122 static float float_zero; | |
| 123 static double double_zero; | |
| 124 public: | |
| 125 ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result) | |
| 126 : _bytecode(bytecode), _input(input), _result(result) { | |
| 127 } | |
| 128 | |
| 129 Bytecodes::Code bytecode() { return _bytecode; } | |
| 130 LIR_Opr input() { return _input; } | |
| 131 LIR_Opr result() { return _result; } | |
| 132 | |
| 133 virtual void emit_code(LIR_Assembler* e); | |
| 134 virtual void visit(LIR_OpVisitState* visitor) { | |
| 135 visitor->do_slow_case(); | |
| 136 visitor->do_input(_input); | |
| 137 visitor->do_output(_result); | |
| 138 } | |
| 139 #ifndef PRODUCT | |
| 140 virtual void print_name(outputStream* out) const { out->print("ConversionStub"); } | |
| 141 #endif // PRODUCT | |
| 142 }; | |
| 143 | |
| 144 | |
| 145 // Throws ArrayIndexOutOfBoundsException by default but can be | |
| 146 // configured to throw IndexOutOfBoundsException in constructor | |
| 147 class RangeCheckStub: public CodeStub { | |
| 148 private: | |
| 149 CodeEmitInfo* _info; | |
| 150 LIR_Opr _index; | |
| 151 bool _throw_index_out_of_bounds_exception; | |
| 152 | |
| 153 public: | |
| 154 RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false); | |
| 155 virtual void emit_code(LIR_Assembler* e); | |
| 156 virtual CodeEmitInfo* info() const { return _info; } | |
| 157 virtual bool is_exception_throw_stub() const { return true; } | |
| 158 virtual bool is_range_check_stub() const { return true; } | |
| 159 virtual void visit(LIR_OpVisitState* visitor) { | |
| 160 visitor->do_slow_case(_info); | |
| 161 visitor->do_input(_index); | |
| 162 } | |
| 163 #ifndef PRODUCT | |
| 164 virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); } | |
| 165 #endif // PRODUCT | |
| 166 }; | |
| 167 | |
| 168 | |
| 169 class DivByZeroStub: public CodeStub { | |
| 170 private: | |
| 171 CodeEmitInfo* _info; | |
| 172 int _offset; | |
| 173 | |
| 174 public: | |
| 175 DivByZeroStub(CodeEmitInfo* info) | |
| 176 : _info(info), _offset(-1) { | |
| 177 } | |
| 178 DivByZeroStub(int offset, CodeEmitInfo* info) | |
| 179 : _info(info), _offset(offset) { | |
| 180 } | |
| 181 virtual void emit_code(LIR_Assembler* e); | |
| 182 virtual CodeEmitInfo* info() const { return _info; } | |
| 183 virtual bool is_exception_throw_stub() const { return true; } | |
| 184 virtual bool is_divbyzero_stub() const { return true; } | |
| 185 virtual void visit(LIR_OpVisitState* visitor) { | |
| 186 visitor->do_slow_case(_info); | |
| 187 } | |
| 188 #ifndef PRODUCT | |
| 189 virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); } | |
| 190 #endif // PRODUCT | |
| 191 }; | |
| 192 | |
| 193 | |
| 194 class ImplicitNullCheckStub: public CodeStub { | |
| 195 private: | |
| 196 CodeEmitInfo* _info; | |
| 197 int _offset; | |
| 198 | |
| 199 public: | |
| 200 ImplicitNullCheckStub(int offset, CodeEmitInfo* info) | |
| 201 : _offset(offset), _info(info) { | |
| 202 } | |
| 203 virtual void emit_code(LIR_Assembler* e); | |
| 204 virtual CodeEmitInfo* info() const { return _info; } | |
| 205 virtual bool is_exception_throw_stub() const { return true; } | |
| 206 virtual void visit(LIR_OpVisitState* visitor) { | |
| 207 visitor->do_slow_case(_info); | |
| 208 } | |
| 209 #ifndef PRODUCT | |
| 210 virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); } | |
| 211 #endif // PRODUCT | |
| 212 }; | |
| 213 | |
| 214 | |
| 215 class NewInstanceStub: public CodeStub { | |
| 216 private: | |
| 217 ciInstanceKlass* _klass; | |
| 218 LIR_Opr _klass_reg; | |
| 219 LIR_Opr _result; | |
| 220 CodeEmitInfo* _info; | |
| 221 Runtime1::StubID _stub_id; | |
| 222 | |
| 223 public: | |
| 224 NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id); | |
| 225 virtual void emit_code(LIR_Assembler* e); | |
| 226 virtual CodeEmitInfo* info() const { return _info; } | |
| 227 virtual void visit(LIR_OpVisitState* visitor) { | |
| 228 visitor->do_slow_case(_info); | |
| 229 visitor->do_input(_klass_reg); | |
| 230 visitor->do_output(_result); | |
| 231 } | |
| 232 #ifndef PRODUCT | |
| 233 virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); } | |
| 234 #endif // PRODUCT | |
| 235 }; | |
| 236 | |
| 237 | |
| 238 class NewTypeArrayStub: public CodeStub { | |
| 239 private: | |
| 240 LIR_Opr _klass_reg; | |
| 241 LIR_Opr _length; | |
| 242 LIR_Opr _result; | |
| 243 CodeEmitInfo* _info; | |
| 244 | |
| 245 public: | |
| 246 NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); | |
| 247 virtual void emit_code(LIR_Assembler* e); | |
| 248 virtual CodeEmitInfo* info() const { return _info; } | |
| 249 virtual void visit(LIR_OpVisitState* visitor) { | |
| 250 visitor->do_slow_case(_info); | |
| 251 visitor->do_input(_klass_reg); | |
| 252 visitor->do_input(_length); | |
| 253 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); | |
| 254 } | |
| 255 #ifndef PRODUCT | |
| 256 virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); } | |
| 257 #endif // PRODUCT | |
| 258 }; | |
| 259 | |
| 260 | |
| 261 class NewObjectArrayStub: public CodeStub { | |
| 262 private: | |
| 263 LIR_Opr _klass_reg; | |
| 264 LIR_Opr _length; | |
| 265 LIR_Opr _result; | |
| 266 CodeEmitInfo* _info; | |
| 267 | |
| 268 public: | |
| 269 NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); | |
| 270 virtual void emit_code(LIR_Assembler* e); | |
| 271 virtual CodeEmitInfo* info() const { return _info; } | |
| 272 virtual void visit(LIR_OpVisitState* visitor) { | |
| 273 visitor->do_slow_case(_info); | |
| 274 visitor->do_input(_klass_reg); | |
| 275 visitor->do_input(_length); | |
| 276 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); | |
| 277 } | |
| 278 #ifndef PRODUCT | |
| 279 virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); } | |
| 280 #endif // PRODUCT | |
| 281 }; | |
| 282 | |
| 283 | |
| 284 class MonitorAccessStub: public CodeStub { | |
| 285 protected: | |
| 286 LIR_Opr _obj_reg; | |
| 287 LIR_Opr _lock_reg; | |
| 288 | |
| 289 public: | |
| 290 MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) { | |
| 291 _obj_reg = obj_reg; | |
| 292 _lock_reg = lock_reg; | |
| 293 } | |
| 294 | |
| 295 #ifndef PRODUCT | |
| 296 virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); } | |
| 297 #endif // PRODUCT | |
| 298 }; | |
| 299 | |
| 300 | |
| 301 class MonitorEnterStub: public MonitorAccessStub { | |
| 302 private: | |
| 303 CodeEmitInfo* _info; | |
| 304 | |
| 305 public: | |
| 306 MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info); | |
| 307 | |
| 308 virtual void emit_code(LIR_Assembler* e); | |
| 309 virtual CodeEmitInfo* info() const { return _info; } | |
| 310 virtual void visit(LIR_OpVisitState* visitor) { | |
| 311 visitor->do_input(_obj_reg); | |
| 312 visitor->do_input(_lock_reg); | |
| 313 visitor->do_slow_case(_info); | |
| 314 } | |
| 315 #ifndef PRODUCT | |
| 316 virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); } | |
| 317 #endif // PRODUCT | |
| 318 }; | |
| 319 | |
| 320 | |
| 321 class MonitorExitStub: public MonitorAccessStub { | |
| 322 private: | |
| 323 bool _compute_lock; | |
| 324 int _monitor_ix; | |
| 325 | |
| 326 public: | |
| 327 MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix) | |
| 328 : MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg), | |
| 329 _compute_lock(compute_lock), _monitor_ix(monitor_ix) { } | |
| 330 virtual void emit_code(LIR_Assembler* e); | |
| 331 virtual void visit(LIR_OpVisitState* visitor) { | |
| 332 assert(_obj_reg->is_illegal(), "unused"); | |
| 333 if (_compute_lock) { | |
| 334 visitor->do_temp(_lock_reg); | |
| 335 } else { | |
| 336 visitor->do_input(_lock_reg); | |
| 337 } | |
| 338 } | |
| 339 #ifndef PRODUCT | |
| 340 virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); } | |
| 341 #endif // PRODUCT | |
| 342 }; | |
| 343 | |
| 344 | |
| 345 class PatchingStub: public CodeStub { | |
| 346 public: | |
| 347 enum PatchID { | |
| 348 access_field_id, | |
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349 load_klass_id, |
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350 load_mirror_id |
| 0 | 351 }; |
| 352 enum constants { | |
| 353 patch_info_size = 3 | |
| 354 }; | |
| 355 private: | |
| 356 PatchID _id; | |
| 357 address _pc_start; | |
| 358 int _bytes_to_copy; | |
| 359 Label _patched_code_entry; | |
| 360 Label _patch_site_entry; | |
| 361 Label _patch_site_continuation; | |
| 362 Register _obj; | |
| 363 CodeEmitInfo* _info; | |
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364 int _index; // index of the patchable oop or Klass* in nmethod oop or metadata table if needed |
| 0 | 365 static int _patch_info_offset; |
| 366 | |
| 367 void align_patch_site(MacroAssembler* masm); | |
| 368 | |
| 369 public: | |
| 370 static int patch_info_offset() { return _patch_info_offset; } | |
| 371 | |
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372 PatchingStub(MacroAssembler* masm, PatchID id, int index = -1): |
| 0 | 373 _id(id) |
| 374 , _info(NULL) | |
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375 , _index(index) { |
| 0 | 376 if (os::is_MP()) { |
| 377 // force alignment of patch sites on MP hardware so we | |
| 378 // can guarantee atomic writes to the patch site. | |
| 379 align_patch_site(masm); | |
| 380 } | |
| 381 _pc_start = masm->pc(); | |
| 382 masm->bind(_patch_site_entry); | |
| 383 } | |
| 384 | |
| 385 void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) { | |
| 386 _info = info; | |
| 387 _obj = obj; | |
| 388 masm->bind(_patch_site_continuation); | |
| 389 _bytes_to_copy = masm->pc() - pc_start(); | |
| 390 if (_id == PatchingStub::access_field_id) { | |
| 391 // embed a fixed offset to handle long patches which need to be offset by a word. | |
| 392 // the patching code will just add the field offset field to this offset so | |
| 393 // that we can refernce either the high or low word of a double word field. | |
| 394 int field_offset = 0; | |
| 395 switch (patch_code) { | |
| 396 case lir_patch_low: field_offset = lo_word_offset_in_bytes; break; | |
| 397 case lir_patch_high: field_offset = hi_word_offset_in_bytes; break; | |
| 398 case lir_patch_normal: field_offset = 0; break; | |
| 399 default: ShouldNotReachHere(); | |
| 400 } | |
| 401 NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start()); | |
| 402 n_move->set_offset(field_offset); | |
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403 } else if (_id == load_klass_id || _id == load_mirror_id) { |
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404 assert(_obj != noreg, "must have register object for load_klass/load_mirror"); |
| 0 | 405 #ifdef ASSERT |
| 406 // verify that we're pointing at a NativeMovConstReg | |
| 407 nativeMovConstReg_at(pc_start()); | |
| 408 #endif | |
| 409 } else { | |
| 410 ShouldNotReachHere(); | |
| 411 } | |
| 412 assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes"); | |
| 413 } | |
| 414 | |
| 415 address pc_start() const { return _pc_start; } | |
| 416 PatchID id() const { return _id; } | |
| 417 | |
| 418 virtual void emit_code(LIR_Assembler* e); | |
| 419 virtual CodeEmitInfo* info() const { return _info; } | |
| 420 virtual void visit(LIR_OpVisitState* visitor) { | |
| 421 visitor->do_slow_case(_info); | |
| 422 } | |
| 423 #ifndef PRODUCT | |
| 424 virtual void print_name(outputStream* out) const { out->print("PatchingStub"); } | |
| 425 #endif // PRODUCT | |
| 426 }; | |
| 427 | |
| 428 | |
| 1295 | 429 //------------------------------------------------------------------------------ |
| 430 // DeoptimizeStub | |
| 431 // | |
| 432 class DeoptimizeStub : public CodeStub { | |
| 433 private: | |
| 434 CodeEmitInfo* _info; | |
| 435 | |
| 436 public: | |
| 437 DeoptimizeStub(CodeEmitInfo* info) : _info(new CodeEmitInfo(info)) {} | |
| 438 | |
| 439 virtual void emit_code(LIR_Assembler* e); | |
| 440 virtual CodeEmitInfo* info() const { return _info; } | |
| 441 virtual bool is_exception_throw_stub() const { return true; } | |
| 442 virtual void visit(LIR_OpVisitState* visitor) { | |
| 443 visitor->do_slow_case(_info); | |
| 444 } | |
| 445 #ifndef PRODUCT | |
| 446 virtual void print_name(outputStream* out) const { out->print("DeoptimizeStub"); } | |
| 447 #endif // PRODUCT | |
| 448 }; | |
| 449 | |
| 450 | |
| 0 | 451 class SimpleExceptionStub: public CodeStub { |
| 452 private: | |
| 453 LIR_Opr _obj; | |
| 454 Runtime1::StubID _stub; | |
| 455 CodeEmitInfo* _info; | |
| 456 | |
| 457 public: | |
| 458 SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info): | |
| 459 _obj(obj), _info(info), _stub(stub) { | |
| 460 } | |
| 461 | |
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462 void set_obj(LIR_Opr obj) { |
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463 _obj = obj; |
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464 } |
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465 |
| 0 | 466 virtual void emit_code(LIR_Assembler* e); |
| 467 virtual CodeEmitInfo* info() const { return _info; } | |
| 468 virtual bool is_exception_throw_stub() const { return true; } | |
| 469 virtual void visit(LIR_OpVisitState* visitor) { | |
| 470 if (_obj->is_valid()) visitor->do_input(_obj); | |
| 471 visitor->do_slow_case(_info); | |
| 472 } | |
| 473 #ifndef PRODUCT | |
| 474 virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); } | |
| 475 #endif // PRODUCT | |
| 476 }; | |
| 477 | |
| 478 | |
| 479 | |
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480 class ArrayStoreExceptionStub: public SimpleExceptionStub { |
| 0 | 481 private: |
| 482 CodeEmitInfo* _info; | |
| 483 | |
| 484 public: | |
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485 ArrayStoreExceptionStub(LIR_Opr obj, CodeEmitInfo* info): SimpleExceptionStub(Runtime1::throw_array_store_exception_id, obj, info) {} |
| 0 | 486 #ifndef PRODUCT |
| 487 virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); } | |
| 488 #endif // PRODUCT | |
| 489 }; | |
| 490 | |
| 491 | |
| 492 class ArrayCopyStub: public CodeStub { | |
| 493 private: | |
| 494 LIR_OpArrayCopy* _op; | |
| 495 | |
| 496 public: | |
| 497 ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { } | |
| 498 | |
| 499 LIR_Opr src() const { return _op->src(); } | |
| 500 LIR_Opr src_pos() const { return _op->src_pos(); } | |
| 501 LIR_Opr dst() const { return _op->dst(); } | |
| 502 LIR_Opr dst_pos() const { return _op->dst_pos(); } | |
| 503 LIR_Opr length() const { return _op->length(); } | |
| 504 LIR_Opr tmp() const { return _op->tmp(); } | |
| 505 | |
| 506 virtual void emit_code(LIR_Assembler* e); | |
| 507 virtual CodeEmitInfo* info() const { return _op->info(); } | |
| 508 virtual void visit(LIR_OpVisitState* visitor) { | |
| 509 // don't pass in the code emit info since it's processed in the fast path | |
| 510 visitor->do_slow_case(); | |
| 511 } | |
| 512 #ifndef PRODUCT | |
| 513 virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); } | |
| 514 #endif // PRODUCT | |
| 515 }; | |
| 342 | 516 |
| 517 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 518 #ifndef SERIALGC | |
| 519 | |
| 520 // Code stubs for Garbage-First barriers. | |
| 521 class G1PreBarrierStub: public CodeStub { | |
| 522 private: | |
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523 bool _do_load; |
| 342 | 524 LIR_Opr _addr; |
| 525 LIR_Opr _pre_val; | |
| 526 LIR_PatchCode _patch_code; | |
| 527 CodeEmitInfo* _info; | |
| 528 | |
| 529 public: | |
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530 // Version that _does_ generate a load of the previous value from addr. |
| 342 | 531 // addr (the address of the field to be read) must be a LIR_Address |
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532 // pre_val (a temporary register) must be a register; |
| 342 | 533 G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) : |
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534 _addr(addr), _pre_val(pre_val), _do_load(true), |
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535 _patch_code(patch_code), _info(info) |
| 342 | 536 { |
| 537 assert(_pre_val->is_register(), "should be temporary register"); | |
| 538 assert(_addr->is_address(), "should be the address of the field"); | |
| 539 } | |
| 540 | |
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541 // Version that _does not_ generate load of the previous value; the |
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542 // previous value is assumed to have already been loaded into pre_val. |
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543 G1PreBarrierStub(LIR_Opr pre_val) : |
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544 _addr(LIR_OprFact::illegalOpr), _pre_val(pre_val), _do_load(false), |
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545 _patch_code(lir_patch_none), _info(NULL) |
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546 { |
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547 assert(_pre_val->is_register(), "should be a register"); |
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548 } |
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549 |
| 342 | 550 LIR_Opr addr() const { return _addr; } |
| 551 LIR_Opr pre_val() const { return _pre_val; } | |
| 552 LIR_PatchCode patch_code() const { return _patch_code; } | |
| 553 CodeEmitInfo* info() const { return _info; } | |
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554 bool do_load() const { return _do_load; } |
| 342 | 555 |
| 556 virtual void emit_code(LIR_Assembler* e); | |
| 557 virtual void visit(LIR_OpVisitState* visitor) { | |
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558 if (_do_load) { |
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559 // don't pass in the code emit info since it's processed in the fast |
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560 // path |
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561 if (_info != NULL) |
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562 visitor->do_slow_case(_info); |
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563 else |
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564 visitor->do_slow_case(); |
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565 |
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566 visitor->do_input(_addr); |
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567 visitor->do_temp(_pre_val); |
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568 } else { |
| 342 | 569 visitor->do_slow_case(); |
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570 visitor->do_input(_pre_val); |
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571 } |
| 342 | 572 } |
| 573 #ifndef PRODUCT | |
| 574 virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); } | |
| 575 #endif // PRODUCT | |
| 576 }; | |
| 577 | |
| 578 class G1PostBarrierStub: public CodeStub { | |
| 579 private: | |
| 580 LIR_Opr _addr; | |
| 581 LIR_Opr _new_val; | |
| 582 | |
| 583 static jbyte* _byte_map_base; | |
| 584 static jbyte* byte_map_base_slow(); | |
| 585 static jbyte* byte_map_base() { | |
| 586 if (_byte_map_base == NULL) { | |
| 587 _byte_map_base = byte_map_base_slow(); | |
| 588 } | |
| 589 return _byte_map_base; | |
| 590 } | |
| 591 | |
| 592 public: | |
| 593 // addr (the address of the object head) and new_val must be registers. | |
| 594 G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { } | |
| 595 | |
| 596 LIR_Opr addr() const { return _addr; } | |
| 597 LIR_Opr new_val() const { return _new_val; } | |
| 598 | |
| 599 virtual void emit_code(LIR_Assembler* e); | |
| 600 virtual void visit(LIR_OpVisitState* visitor) { | |
| 601 // don't pass in the code emit info since it's processed in the fast path | |
| 602 visitor->do_slow_case(); | |
| 603 visitor->do_input(_addr); | |
| 604 visitor->do_input(_new_val); | |
| 605 } | |
| 606 #ifndef PRODUCT | |
| 607 virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); } | |
| 608 #endif // PRODUCT | |
| 609 }; | |
| 610 | |
| 611 #endif // SERIALGC | |
| 612 ////////////////////////////////////////////////////////////////////////////////////////// | |
| 1972 | 613 |
| 614 #endif // SHARE_VM_C1_C1_CODESTUBS_HPP |