Mercurial > hg > truffle
annotate src/share/vm/c1/c1_CodeStubs.hpp @ 7458:4daebd4cc1dd
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author | minqi |
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date | Mon, 24 Dec 2012 11:46:38 -0800 |
parents | da91efe96a93 |
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rev | line source |
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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 |