Mercurial > hg > truffle
annotate src/share/vm/c1/c1_CodeStubs.hpp @ 10370:47bdfb3d010f
8015486: PSScavenge::is_obj_in_young is unnecessarily slow with UseCompressedOops
Summary: Compare compressed oops to a compressed young gen boundary instead of uncompressing the oops before doing the young gen boundary check.
Reviewed-by: brutisso, jmasa
author | stefank |
---|---|
date | Thu, 30 May 2013 10:58:16 +0200 |
parents | 46f6f063b272 |
children | f98f5d48f511 |
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" | |
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34 #include "utilities/macros.hpp" |
1972 | 35 |
0 | 36 class CodeEmitInfo; |
37 class LIR_Assembler; | |
38 class LIR_OpVisitState; | |
39 | |
40 // CodeStubs are little 'out-of-line' pieces of code that | |
41 // usually handle slow cases of operations. All code stubs | |
42 // are collected and code is emitted at the end of the | |
43 // nmethod. | |
44 | |
45 class CodeStub: public CompilationResourceObj { | |
46 protected: | |
47 Label _entry; // label at the stub entry point | |
48 Label _continuation; // label where stub continues, if any | |
49 | |
50 public: | |
51 CodeStub() {} | |
52 | |
53 // code generation | |
54 void assert_no_unbound_labels() { assert(!_entry.is_unbound() && !_continuation.is_unbound(), "unbound label"); } | |
55 virtual void emit_code(LIR_Assembler* e) = 0; | |
56 virtual CodeEmitInfo* info() const { return NULL; } | |
57 virtual bool is_exception_throw_stub() const { return false; } | |
58 virtual bool is_range_check_stub() const { return false; } | |
59 virtual bool is_divbyzero_stub() const { return false; } | |
60 #ifndef PRODUCT | |
61 virtual void print_name(outputStream* out) const = 0; | |
62 #endif | |
63 | |
64 // label access | |
65 Label* entry() { return &_entry; } | |
66 Label* continuation() { return &_continuation; } | |
67 // for LIR | |
68 virtual void visit(LIR_OpVisitState* visit) { | |
69 #ifndef PRODUCT | |
70 if (LIRTracePeephole && Verbose) { | |
71 tty->print("no visitor for "); | |
72 print_name(tty); | |
73 tty->cr(); | |
74 } | |
75 #endif | |
76 } | |
77 }; | |
78 | |
79 | |
80 define_array(CodeStubArray, CodeStub*) | |
81 define_stack(_CodeStubList, CodeStubArray) | |
82 | |
83 class CodeStubList: public _CodeStubList { | |
84 public: | |
85 CodeStubList(): _CodeStubList() {} | |
86 | |
87 void append(CodeStub* stub) { | |
88 if (!contains(stub)) { | |
89 _CodeStubList::append(stub); | |
90 } | |
91 } | |
92 }; | |
93 | |
94 class CounterOverflowStub: public CodeStub { | |
95 private: | |
96 CodeEmitInfo* _info; | |
97 int _bci; | |
1783 | 98 LIR_Opr _method; |
0 | 99 |
100 public: | |
1783 | 101 CounterOverflowStub(CodeEmitInfo* info, int bci, LIR_Opr method) : _info(info), _bci(bci), _method(method) { |
0 | 102 } |
103 | |
104 virtual void emit_code(LIR_Assembler* e); | |
105 | |
106 virtual void visit(LIR_OpVisitState* visitor) { | |
107 visitor->do_slow_case(_info); | |
1783 | 108 visitor->do_input(_method); |
0 | 109 } |
110 | |
111 #ifndef PRODUCT | |
112 virtual void print_name(outputStream* out) const { out->print("CounterOverflowStub"); } | |
113 #endif // PRODUCT | |
114 | |
115 }; | |
116 | |
117 class ConversionStub: public CodeStub { | |
118 private: | |
119 Bytecodes::Code _bytecode; | |
120 LIR_Opr _input; | |
121 LIR_Opr _result; | |
122 | |
123 static float float_zero; | |
124 static double double_zero; | |
125 public: | |
126 ConversionStub(Bytecodes::Code bytecode, LIR_Opr input, LIR_Opr result) | |
127 : _bytecode(bytecode), _input(input), _result(result) { | |
128 } | |
129 | |
130 Bytecodes::Code bytecode() { return _bytecode; } | |
131 LIR_Opr input() { return _input; } | |
132 LIR_Opr result() { return _result; } | |
133 | |
134 virtual void emit_code(LIR_Assembler* e); | |
135 virtual void visit(LIR_OpVisitState* visitor) { | |
136 visitor->do_slow_case(); | |
137 visitor->do_input(_input); | |
138 visitor->do_output(_result); | |
139 } | |
140 #ifndef PRODUCT | |
141 virtual void print_name(outputStream* out) const { out->print("ConversionStub"); } | |
142 #endif // PRODUCT | |
143 }; | |
144 | |
145 | |
146 // Throws ArrayIndexOutOfBoundsException by default but can be | |
147 // configured to throw IndexOutOfBoundsException in constructor | |
148 class RangeCheckStub: public CodeStub { | |
149 private: | |
150 CodeEmitInfo* _info; | |
151 LIR_Opr _index; | |
152 bool _throw_index_out_of_bounds_exception; | |
153 | |
154 public: | |
155 RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, bool throw_index_out_of_bounds_exception = false); | |
156 virtual void emit_code(LIR_Assembler* e); | |
157 virtual CodeEmitInfo* info() const { return _info; } | |
158 virtual bool is_exception_throw_stub() const { return true; } | |
159 virtual bool is_range_check_stub() const { return true; } | |
160 virtual void visit(LIR_OpVisitState* visitor) { | |
161 visitor->do_slow_case(_info); | |
162 visitor->do_input(_index); | |
163 } | |
164 #ifndef PRODUCT | |
165 virtual void print_name(outputStream* out) const { out->print("RangeCheckStub"); } | |
166 #endif // PRODUCT | |
167 }; | |
168 | |
8860 | 169 // stub used when predicate fails and deoptimization is needed |
170 class PredicateFailedStub: public CodeStub { | |
171 private: | |
172 CodeEmitInfo* _info; | |
173 | |
174 public: | |
175 PredicateFailedStub(CodeEmitInfo* info); | |
176 virtual void emit_code(LIR_Assembler* e); | |
177 virtual CodeEmitInfo* info() const { return _info; } | |
178 virtual void visit(LIR_OpVisitState* visitor) { | |
179 visitor->do_slow_case(_info); | |
180 } | |
181 #ifndef PRODUCT | |
182 virtual void print_name(outputStream* out) const { out->print("PredicateFailedStub"); } | |
183 #endif // PRODUCT | |
184 }; | |
0 | 185 |
186 class DivByZeroStub: public CodeStub { | |
187 private: | |
188 CodeEmitInfo* _info; | |
189 int _offset; | |
190 | |
191 public: | |
192 DivByZeroStub(CodeEmitInfo* info) | |
193 : _info(info), _offset(-1) { | |
194 } | |
195 DivByZeroStub(int offset, CodeEmitInfo* info) | |
196 : _info(info), _offset(offset) { | |
197 } | |
198 virtual void emit_code(LIR_Assembler* e); | |
199 virtual CodeEmitInfo* info() const { return _info; } | |
200 virtual bool is_exception_throw_stub() const { return true; } | |
201 virtual bool is_divbyzero_stub() const { return true; } | |
202 virtual void visit(LIR_OpVisitState* visitor) { | |
203 visitor->do_slow_case(_info); | |
204 } | |
205 #ifndef PRODUCT | |
206 virtual void print_name(outputStream* out) const { out->print("DivByZeroStub"); } | |
207 #endif // PRODUCT | |
208 }; | |
209 | |
210 | |
211 class ImplicitNullCheckStub: public CodeStub { | |
212 private: | |
213 CodeEmitInfo* _info; | |
214 int _offset; | |
215 | |
216 public: | |
217 ImplicitNullCheckStub(int offset, CodeEmitInfo* info) | |
218 : _offset(offset), _info(info) { | |
219 } | |
220 virtual void emit_code(LIR_Assembler* e); | |
221 virtual CodeEmitInfo* info() const { return _info; } | |
222 virtual bool is_exception_throw_stub() const { return true; } | |
223 virtual void visit(LIR_OpVisitState* visitor) { | |
224 visitor->do_slow_case(_info); | |
225 } | |
226 #ifndef PRODUCT | |
227 virtual void print_name(outputStream* out) const { out->print("ImplicitNullCheckStub"); } | |
228 #endif // PRODUCT | |
229 }; | |
230 | |
231 | |
232 class NewInstanceStub: public CodeStub { | |
233 private: | |
234 ciInstanceKlass* _klass; | |
235 LIR_Opr _klass_reg; | |
236 LIR_Opr _result; | |
237 CodeEmitInfo* _info; | |
238 Runtime1::StubID _stub_id; | |
239 | |
240 public: | |
241 NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id); | |
242 virtual void emit_code(LIR_Assembler* e); | |
243 virtual CodeEmitInfo* info() const { return _info; } | |
244 virtual void visit(LIR_OpVisitState* visitor) { | |
245 visitor->do_slow_case(_info); | |
246 visitor->do_input(_klass_reg); | |
247 visitor->do_output(_result); | |
248 } | |
249 #ifndef PRODUCT | |
250 virtual void print_name(outputStream* out) const { out->print("NewInstanceStub"); } | |
251 #endif // PRODUCT | |
252 }; | |
253 | |
254 | |
255 class NewTypeArrayStub: public CodeStub { | |
256 private: | |
257 LIR_Opr _klass_reg; | |
258 LIR_Opr _length; | |
259 LIR_Opr _result; | |
260 CodeEmitInfo* _info; | |
261 | |
262 public: | |
263 NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); | |
264 virtual void emit_code(LIR_Assembler* e); | |
265 virtual CodeEmitInfo* info() const { return _info; } | |
266 virtual void visit(LIR_OpVisitState* visitor) { | |
267 visitor->do_slow_case(_info); | |
268 visitor->do_input(_klass_reg); | |
269 visitor->do_input(_length); | |
270 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); | |
271 } | |
272 #ifndef PRODUCT | |
273 virtual void print_name(outputStream* out) const { out->print("NewTypeArrayStub"); } | |
274 #endif // PRODUCT | |
275 }; | |
276 | |
277 | |
278 class NewObjectArrayStub: public CodeStub { | |
279 private: | |
280 LIR_Opr _klass_reg; | |
281 LIR_Opr _length; | |
282 LIR_Opr _result; | |
283 CodeEmitInfo* _info; | |
284 | |
285 public: | |
286 NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info); | |
287 virtual void emit_code(LIR_Assembler* e); | |
288 virtual CodeEmitInfo* info() const { return _info; } | |
289 virtual void visit(LIR_OpVisitState* visitor) { | |
290 visitor->do_slow_case(_info); | |
291 visitor->do_input(_klass_reg); | |
292 visitor->do_input(_length); | |
293 assert(_result->is_valid(), "must be valid"); visitor->do_output(_result); | |
294 } | |
295 #ifndef PRODUCT | |
296 virtual void print_name(outputStream* out) const { out->print("NewObjectArrayStub"); } | |
297 #endif // PRODUCT | |
298 }; | |
299 | |
300 | |
301 class MonitorAccessStub: public CodeStub { | |
302 protected: | |
303 LIR_Opr _obj_reg; | |
304 LIR_Opr _lock_reg; | |
305 | |
306 public: | |
307 MonitorAccessStub(LIR_Opr obj_reg, LIR_Opr lock_reg) { | |
308 _obj_reg = obj_reg; | |
309 _lock_reg = lock_reg; | |
310 } | |
311 | |
312 #ifndef PRODUCT | |
313 virtual void print_name(outputStream* out) const { out->print("MonitorAccessStub"); } | |
314 #endif // PRODUCT | |
315 }; | |
316 | |
317 | |
318 class MonitorEnterStub: public MonitorAccessStub { | |
319 private: | |
320 CodeEmitInfo* _info; | |
321 | |
322 public: | |
323 MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info); | |
324 | |
325 virtual void emit_code(LIR_Assembler* e); | |
326 virtual CodeEmitInfo* info() const { return _info; } | |
327 virtual void visit(LIR_OpVisitState* visitor) { | |
328 visitor->do_input(_obj_reg); | |
329 visitor->do_input(_lock_reg); | |
330 visitor->do_slow_case(_info); | |
331 } | |
332 #ifndef PRODUCT | |
333 virtual void print_name(outputStream* out) const { out->print("MonitorEnterStub"); } | |
334 #endif // PRODUCT | |
335 }; | |
336 | |
337 | |
338 class MonitorExitStub: public MonitorAccessStub { | |
339 private: | |
340 bool _compute_lock; | |
341 int _monitor_ix; | |
342 | |
343 public: | |
344 MonitorExitStub(LIR_Opr lock_reg, bool compute_lock, int monitor_ix) | |
345 : MonitorAccessStub(LIR_OprFact::illegalOpr, lock_reg), | |
346 _compute_lock(compute_lock), _monitor_ix(monitor_ix) { } | |
347 virtual void emit_code(LIR_Assembler* e); | |
348 virtual void visit(LIR_OpVisitState* visitor) { | |
349 assert(_obj_reg->is_illegal(), "unused"); | |
350 if (_compute_lock) { | |
351 visitor->do_temp(_lock_reg); | |
352 } else { | |
353 visitor->do_input(_lock_reg); | |
354 } | |
355 } | |
356 #ifndef PRODUCT | |
357 virtual void print_name(outputStream* out) const { out->print("MonitorExitStub"); } | |
358 #endif // PRODUCT | |
359 }; | |
360 | |
361 | |
362 class PatchingStub: public CodeStub { | |
363 public: | |
364 enum PatchID { | |
365 access_field_id, | |
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366 load_klass_id, |
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367 load_mirror_id |
0 | 368 }; |
369 enum constants { | |
370 patch_info_size = 3 | |
371 }; | |
372 private: | |
373 PatchID _id; | |
374 address _pc_start; | |
375 int _bytes_to_copy; | |
376 Label _patched_code_entry; | |
377 Label _patch_site_entry; | |
378 Label _patch_site_continuation; | |
379 Register _obj; | |
380 CodeEmitInfo* _info; | |
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381 int _index; // index of the patchable oop or Klass* in nmethod oop or metadata table if needed |
0 | 382 static int _patch_info_offset; |
383 | |
384 void align_patch_site(MacroAssembler* masm); | |
385 | |
386 public: | |
387 static int patch_info_offset() { return _patch_info_offset; } | |
388 | |
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389 PatchingStub(MacroAssembler* masm, PatchID id, int index = -1): |
0 | 390 _id(id) |
391 , _info(NULL) | |
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392 , _index(index) { |
0 | 393 if (os::is_MP()) { |
394 // force alignment of patch sites on MP hardware so we | |
395 // can guarantee atomic writes to the patch site. | |
396 align_patch_site(masm); | |
397 } | |
398 _pc_start = masm->pc(); | |
399 masm->bind(_patch_site_entry); | |
400 } | |
401 | |
402 void install(MacroAssembler* masm, LIR_PatchCode patch_code, Register obj, CodeEmitInfo* info) { | |
403 _info = info; | |
404 _obj = obj; | |
405 masm->bind(_patch_site_continuation); | |
406 _bytes_to_copy = masm->pc() - pc_start(); | |
407 if (_id == PatchingStub::access_field_id) { | |
408 // embed a fixed offset to handle long patches which need to be offset by a word. | |
409 // the patching code will just add the field offset field to this offset so | |
410 // that we can refernce either the high or low word of a double word field. | |
411 int field_offset = 0; | |
412 switch (patch_code) { | |
413 case lir_patch_low: field_offset = lo_word_offset_in_bytes; break; | |
414 case lir_patch_high: field_offset = hi_word_offset_in_bytes; break; | |
415 case lir_patch_normal: field_offset = 0; break; | |
416 default: ShouldNotReachHere(); | |
417 } | |
418 NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start()); | |
419 n_move->set_offset(field_offset); | |
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420 } else if (_id == load_klass_id || _id == load_mirror_id) { |
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421 assert(_obj != noreg, "must have register object for load_klass/load_mirror"); |
0 | 422 #ifdef ASSERT |
423 // verify that we're pointing at a NativeMovConstReg | |
424 nativeMovConstReg_at(pc_start()); | |
425 #endif | |
426 } else { | |
427 ShouldNotReachHere(); | |
428 } | |
429 assert(_bytes_to_copy <= (masm->pc() - pc_start()), "not enough bytes"); | |
430 } | |
431 | |
432 address pc_start() const { return _pc_start; } | |
433 PatchID id() const { return _id; } | |
434 | |
435 virtual void emit_code(LIR_Assembler* e); | |
436 virtual CodeEmitInfo* info() const { return _info; } | |
437 virtual void visit(LIR_OpVisitState* visitor) { | |
438 visitor->do_slow_case(_info); | |
439 } | |
440 #ifndef PRODUCT | |
441 virtual void print_name(outputStream* out) const { out->print("PatchingStub"); } | |
442 #endif // PRODUCT | |
443 }; | |
444 | |
445 | |
1295 | 446 //------------------------------------------------------------------------------ |
447 // DeoptimizeStub | |
448 // | |
449 class DeoptimizeStub : public CodeStub { | |
450 private: | |
451 CodeEmitInfo* _info; | |
452 | |
453 public: | |
454 DeoptimizeStub(CodeEmitInfo* info) : _info(new CodeEmitInfo(info)) {} | |
455 | |
456 virtual void emit_code(LIR_Assembler* e); | |
457 virtual CodeEmitInfo* info() const { return _info; } | |
458 virtual bool is_exception_throw_stub() const { return true; } | |
459 virtual void visit(LIR_OpVisitState* visitor) { | |
460 visitor->do_slow_case(_info); | |
461 } | |
462 #ifndef PRODUCT | |
463 virtual void print_name(outputStream* out) const { out->print("DeoptimizeStub"); } | |
464 #endif // PRODUCT | |
465 }; | |
466 | |
467 | |
0 | 468 class SimpleExceptionStub: public CodeStub { |
469 private: | |
470 LIR_Opr _obj; | |
471 Runtime1::StubID _stub; | |
472 CodeEmitInfo* _info; | |
473 | |
474 public: | |
475 SimpleExceptionStub(Runtime1::StubID stub, LIR_Opr obj, CodeEmitInfo* info): | |
476 _obj(obj), _info(info), _stub(stub) { | |
477 } | |
478 | |
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479 void set_obj(LIR_Opr obj) { |
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480 _obj = obj; |
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481 } |
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482 |
0 | 483 virtual void emit_code(LIR_Assembler* e); |
484 virtual CodeEmitInfo* info() const { return _info; } | |
485 virtual bool is_exception_throw_stub() const { return true; } | |
486 virtual void visit(LIR_OpVisitState* visitor) { | |
487 if (_obj->is_valid()) visitor->do_input(_obj); | |
488 visitor->do_slow_case(_info); | |
489 } | |
490 #ifndef PRODUCT | |
491 virtual void print_name(outputStream* out) const { out->print("SimpleExceptionStub"); } | |
492 #endif // PRODUCT | |
493 }; | |
494 | |
495 | |
496 | |
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497 class ArrayStoreExceptionStub: public SimpleExceptionStub { |
0 | 498 private: |
499 CodeEmitInfo* _info; | |
500 | |
501 public: | |
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502 ArrayStoreExceptionStub(LIR_Opr obj, CodeEmitInfo* info): SimpleExceptionStub(Runtime1::throw_array_store_exception_id, obj, info) {} |
0 | 503 #ifndef PRODUCT |
504 virtual void print_name(outputStream* out) const { out->print("ArrayStoreExceptionStub"); } | |
505 #endif // PRODUCT | |
506 }; | |
507 | |
508 | |
509 class ArrayCopyStub: public CodeStub { | |
510 private: | |
511 LIR_OpArrayCopy* _op; | |
512 | |
513 public: | |
514 ArrayCopyStub(LIR_OpArrayCopy* op): _op(op) { } | |
515 | |
516 LIR_Opr src() const { return _op->src(); } | |
517 LIR_Opr src_pos() const { return _op->src_pos(); } | |
518 LIR_Opr dst() const { return _op->dst(); } | |
519 LIR_Opr dst_pos() const { return _op->dst_pos(); } | |
520 LIR_Opr length() const { return _op->length(); } | |
521 LIR_Opr tmp() const { return _op->tmp(); } | |
522 | |
523 virtual void emit_code(LIR_Assembler* e); | |
524 virtual CodeEmitInfo* info() const { return _op->info(); } | |
525 virtual void visit(LIR_OpVisitState* visitor) { | |
526 // don't pass in the code emit info since it's processed in the fast path | |
527 visitor->do_slow_case(); | |
528 } | |
529 #ifndef PRODUCT | |
530 virtual void print_name(outputStream* out) const { out->print("ArrayCopyStub"); } | |
531 #endif // PRODUCT | |
532 }; | |
342 | 533 |
534 ////////////////////////////////////////////////////////////////////////////////////////// | |
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535 #if INCLUDE_ALL_GCS |
342 | 536 |
537 // Code stubs for Garbage-First barriers. | |
538 class G1PreBarrierStub: public CodeStub { | |
539 private: | |
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540 bool _do_load; |
342 | 541 LIR_Opr _addr; |
542 LIR_Opr _pre_val; | |
543 LIR_PatchCode _patch_code; | |
544 CodeEmitInfo* _info; | |
545 | |
546 public: | |
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547 // Version that _does_ generate a load of the previous value from addr. |
342 | 548 // addr (the address of the field to be read) must be a LIR_Address |
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549 // pre_val (a temporary register) must be a register; |
342 | 550 G1PreBarrierStub(LIR_Opr addr, LIR_Opr pre_val, LIR_PatchCode patch_code, CodeEmitInfo* info) : |
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551 _addr(addr), _pre_val(pre_val), _do_load(true), |
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552 _patch_code(patch_code), _info(info) |
342 | 553 { |
554 assert(_pre_val->is_register(), "should be temporary register"); | |
555 assert(_addr->is_address(), "should be the address of the field"); | |
556 } | |
557 | |
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558 // Version that _does not_ generate load of the previous value; the |
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559 // previous value is assumed to have already been loaded into pre_val. |
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560 G1PreBarrierStub(LIR_Opr pre_val) : |
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561 _addr(LIR_OprFact::illegalOpr), _pre_val(pre_val), _do_load(false), |
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562 _patch_code(lir_patch_none), _info(NULL) |
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563 { |
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564 assert(_pre_val->is_register(), "should be a register"); |
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565 } |
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566 |
342 | 567 LIR_Opr addr() const { return _addr; } |
568 LIR_Opr pre_val() const { return _pre_val; } | |
569 LIR_PatchCode patch_code() const { return _patch_code; } | |
570 CodeEmitInfo* info() const { return _info; } | |
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571 bool do_load() const { return _do_load; } |
342 | 572 |
573 virtual void emit_code(LIR_Assembler* e); | |
574 virtual void visit(LIR_OpVisitState* visitor) { | |
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575 if (_do_load) { |
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576 // don't pass in the code emit info since it's processed in the fast |
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577 // path |
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578 if (_info != NULL) |
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579 visitor->do_slow_case(_info); |
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580 else |
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581 visitor->do_slow_case(); |
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582 |
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583 visitor->do_input(_addr); |
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584 visitor->do_temp(_pre_val); |
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585 } else { |
342 | 586 visitor->do_slow_case(); |
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587 visitor->do_input(_pre_val); |
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588 } |
342 | 589 } |
590 #ifndef PRODUCT | |
591 virtual void print_name(outputStream* out) const { out->print("G1PreBarrierStub"); } | |
592 #endif // PRODUCT | |
593 }; | |
594 | |
595 class G1PostBarrierStub: public CodeStub { | |
596 private: | |
597 LIR_Opr _addr; | |
598 LIR_Opr _new_val; | |
599 | |
600 static jbyte* _byte_map_base; | |
601 static jbyte* byte_map_base_slow(); | |
602 static jbyte* byte_map_base() { | |
603 if (_byte_map_base == NULL) { | |
604 _byte_map_base = byte_map_base_slow(); | |
605 } | |
606 return _byte_map_base; | |
607 } | |
608 | |
609 public: | |
610 // addr (the address of the object head) and new_val must be registers. | |
611 G1PostBarrierStub(LIR_Opr addr, LIR_Opr new_val): _addr(addr), _new_val(new_val) { } | |
612 | |
613 LIR_Opr addr() const { return _addr; } | |
614 LIR_Opr new_val() const { return _new_val; } | |
615 | |
616 virtual void emit_code(LIR_Assembler* e); | |
617 virtual void visit(LIR_OpVisitState* visitor) { | |
618 // don't pass in the code emit info since it's processed in the fast path | |
619 visitor->do_slow_case(); | |
620 visitor->do_input(_addr); | |
621 visitor->do_input(_new_val); | |
622 } | |
623 #ifndef PRODUCT | |
624 virtual void print_name(outputStream* out) const { out->print("G1PostBarrierStub"); } | |
625 #endif // PRODUCT | |
626 }; | |
627 | |
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628 #endif // INCLUDE_ALL_GCS |
342 | 629 ////////////////////////////////////////////////////////////////////////////////////////// |
1972 | 630 |
631 #endif // SHARE_VM_C1_C1_CODESTUBS_HPP |