1 /*
2 * Copyright (c) 1999, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "c1/c1_CodeStubs.hpp"
27 #include "c1/c1_FrameMap.hpp"
28 #include "c1/c1_LIRAssembler.hpp"
29 #include "c1/c1_MacroAssembler.hpp"
30 #include "c1/c1_Runtime1.hpp"
31 #include "classfile/javaClasses.hpp"
32 #include "nativeInst_x86.hpp"
33 #include "oops/objArrayKlass.hpp"
34 #include "runtime/sharedRuntime.hpp"
35 #include "utilities/align.hpp"
36 #include "utilities/macros.hpp"
37 #include "vmreg_x86.inline.hpp"
38
39
40 #define __ ce->masm()->
41
42 #ifndef _LP64
43 float ConversionStub::float_zero = 0.0;
44 double ConversionStub::double_zero = 0.0;
45
46 void ConversionStub::emit_code(LIR_Assembler* ce) {
47 __ bind(_entry);
48 assert(bytecode() == Bytecodes::_f2i || bytecode() == Bytecodes::_d2i, "other conversions do not require stub");
49
50
51 if (input()->is_single_xmm()) {
52 __ comiss(input()->as_xmm_float_reg(),
53 ExternalAddress((address)&float_zero));
54 } else if (input()->is_double_xmm()) {
55 __ comisd(input()->as_xmm_double_reg(),
56 ExternalAddress((address)&double_zero));
57 } else {
58 __ push(rax);
59 __ ftst();
60 __ fnstsw_ax();
61 __ sahf();
62 __ pop(rax);
63 }
64
65 Label NaN, do_return;
66 __ jccb(Assembler::parity, NaN);
67 __ jccb(Assembler::below, do_return);
68
69 // input is > 0 -> return maxInt
70 // result register already contains 0x80000000, so subtracting 1 gives 0x7fffffff
71 __ decrement(result()->as_register());
72 __ jmpb(do_return);
73
74 // input is NaN -> return 0
75 __ bind(NaN);
76 __ xorptr(result()->as_register(), result()->as_register());
77
78 __ bind(do_return);
79 __ jmp(_continuation);
80 }
81 #endif // !_LP64
82
83 void C1SafepointPollStub::emit_code(LIR_Assembler* ce) {
84 __ bind(_entry);
85 InternalAddress safepoint_pc(ce->masm()->pc() - ce->masm()->offset() + safepoint_offset());
86 #ifdef _LP64
87 __ lea(rscratch1, safepoint_pc);
88 __ movptr(Address(r15_thread, JavaThread::saved_exception_pc_offset()), rscratch1);
89 #else
90 const Register tmp1 = rcx;
91 const Register tmp2 = rdx;
92 __ push(tmp1);
93 __ push(tmp2);
94
95 __ lea(tmp1, safepoint_pc);
96 __ get_thread(tmp2);
97 __ movptr(Address(tmp2, JavaThread::saved_exception_pc_offset()), tmp1);
98
99 __ pop(tmp2);
100 __ pop(tmp1);
101 #endif /* _LP64 */
102 assert(SharedRuntime::polling_page_return_handler_blob() != NULL,
103 "polling page return stub not created yet");
104
105 address stub = SharedRuntime::polling_page_return_handler_blob()->entry_point();
106 __ jump(RuntimeAddress(stub));
107 }
108
109 void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
110 __ bind(_entry);
111 Metadata *m = _method->as_constant_ptr()->as_metadata();
112 ce->store_parameter(m, 1);
113 ce->store_parameter(_bci, 0);
114 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::counter_overflow_id)));
115 ce->add_call_info_here(_info);
116 ce->verify_oop_map(_info);
117 __ jmp(_continuation);
118 }
119
120 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index, LIR_Opr array)
121 : _index(index), _array(array), _throw_index_out_of_bounds_exception(false) {
122 assert(info != NULL, "must have info");
123 _info = new CodeEmitInfo(info);
124 }
125
126 RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index)
127 : _index(index), _array(), _throw_index_out_of_bounds_exception(true) {
128 assert(info != NULL, "must have info");
129 _info = new CodeEmitInfo(info);
130 }
131
132 void RangeCheckStub::emit_code(LIR_Assembler* ce) {
133 __ bind(_entry);
134 if (_info->deoptimize_on_exception()) {
135 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
136 __ call(RuntimeAddress(a));
137 ce->add_call_info_here(_info);
138 ce->verify_oop_map(_info);
139 debug_only(__ should_not_reach_here());
140 return;
141 }
142
143 // pass the array index on stack because all registers must be preserved
144 if (_index->is_cpu_register()) {
145 ce->store_parameter(_index->as_register(), 0);
146 } else {
147 ce->store_parameter(_index->as_jint(), 0);
148 }
149 Runtime1::StubID stub_id;
150 if (_throw_index_out_of_bounds_exception) {
151 stub_id = Runtime1::throw_index_exception_id;
152 } else {
153 stub_id = Runtime1::throw_range_check_failed_id;
154 ce->store_parameter(_array->as_pointer_register(), 1);
155 }
156 __ call(RuntimeAddress(Runtime1::entry_for(stub_id)));
157 ce->add_call_info_here(_info);
158 ce->verify_oop_map(_info);
159 debug_only(__ should_not_reach_here());
160 }
161
162 PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
163 _info = new CodeEmitInfo(info);
164 }
165
166 void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
167 __ bind(_entry);
168 address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
169 __ call(RuntimeAddress(a));
170 ce->add_call_info_here(_info);
171 ce->verify_oop_map(_info);
172 debug_only(__ should_not_reach_here());
173 }
174
175 void DivByZeroStub::emit_code(LIR_Assembler* ce) {
176 if (_offset != -1) {
177 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
178 }
179 __ bind(_entry);
180 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::throw_div0_exception_id)));
181 ce->add_call_info_here(_info);
182 debug_only(__ should_not_reach_here());
183 }
184
185
186 // Implementation of LoadFlattenedArrayStub
187
188 LoadFlattenedArrayStub::LoadFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) {
189 _array = array;
190 _index = index;
191 _result = result;
192 // Tell the register allocator that the runtime call will scratch rax.
193 _scratch_reg = FrameMap::rax_oop_opr;
194 _info = new CodeEmitInfo(info);
195 }
196
197 void LoadFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
198 assert(__ rsp_offset() == 0, "frame size should be fixed");
199 __ bind(_entry);
200 ce->store_parameter(_array->as_register(), 1);
201 ce->store_parameter(_index->as_register(), 0);
202 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::load_flattened_array_id)));
203 ce->add_call_info_here(_info);
204 ce->verify_oop_map(_info);
205 if (_result->as_register() != rax) {
206 __ movptr(_result->as_register(), rax);
207 }
208 __ jmp(_continuation);
209 }
210
211
212 // Implementation of StoreFlattenedArrayStub
213
214 StoreFlattenedArrayStub::StoreFlattenedArrayStub(LIR_Opr array, LIR_Opr index, LIR_Opr value, CodeEmitInfo* info) {
215 _array = array;
216 _index = index;
217 _value = value;
218 // Tell the register allocator that the runtime call will scratch rax.
219 _scratch_reg = FrameMap::rax_oop_opr;
220 _info = new CodeEmitInfo(info);
221 }
222
223
224 void StoreFlattenedArrayStub::emit_code(LIR_Assembler* ce) {
225 assert(__ rsp_offset() == 0, "frame size should be fixed");
226 __ bind(_entry);
227 ce->store_parameter(_array->as_register(), 2);
228 ce->store_parameter(_index->as_register(), 1);
229 ce->store_parameter(_value->as_register(), 0);
230 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::store_flattened_array_id)));
231 ce->add_call_info_here(_info);
232 ce->verify_oop_map(_info);
233 __ jmp(_continuation);
234 }
235
236
237 // Implementation of SubstitutabilityCheckStub
238
239 SubstitutabilityCheckStub::SubstitutabilityCheckStub(LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) {
240 _left = left;
241 _right = right;
242 // Tell the register allocator that the runtime call will scratch rax.
243 _scratch_reg = FrameMap::rax_oop_opr;
244 _info = new CodeEmitInfo(info);
245 }
246
247 void SubstitutabilityCheckStub::emit_code(LIR_Assembler* ce) {
248 assert(__ rsp_offset() == 0, "frame size should be fixed");
249 __ bind(_entry);
250 ce->store_parameter(_left->as_register(), 1);
251 ce->store_parameter(_right->as_register(), 0);
252 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::substitutability_check_id)));
253 ce->add_call_info_here(_info);
254 ce->verify_oop_map(_info);
255 __ jmp(_continuation);
256 }
257
258
259 // Implementation of NewInstanceStub
260
261 NewInstanceStub::NewInstanceStub(LIR_Opr klass_reg, LIR_Opr result, ciInstanceKlass* klass, CodeEmitInfo* info, Runtime1::StubID stub_id) {
262 _result = result;
263 _klass = klass;
264 _klass_reg = klass_reg;
265 _info = new CodeEmitInfo(info);
266 assert(stub_id == Runtime1::new_instance_id ||
267 stub_id == Runtime1::new_instance_no_inline_id ||
268 stub_id == Runtime1::fast_new_instance_id ||
269 stub_id == Runtime1::fast_new_instance_init_check_id,
270 "need new_instance id");
271 _stub_id = stub_id;
272 }
273
274
275 void NewInstanceStub::emit_code(LIR_Assembler* ce) {
276 assert(__ rsp_offset() == 0, "frame size should be fixed");
277 __ bind(_entry);
278 __ movptr(rdx, _klass_reg->as_register());
279 __ call(RuntimeAddress(Runtime1::entry_for(_stub_id)));
280 ce->add_call_info_here(_info);
281 ce->verify_oop_map(_info);
282 assert(_result->as_register() == rax, "result must in rax,");
283 __ jmp(_continuation);
284 }
285
286
287 // Implementation of NewTypeArrayStub
288
289 NewTypeArrayStub::NewTypeArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result, CodeEmitInfo* info) {
290 _klass_reg = klass_reg;
291 _length = length;
292 _result = result;
293 _info = new CodeEmitInfo(info);
294 }
295
296
297 void NewTypeArrayStub::emit_code(LIR_Assembler* ce) {
298 assert(__ rsp_offset() == 0, "frame size should be fixed");
299 __ bind(_entry);
300 assert(_length->as_register() == rbx, "length must in rbx,");
301 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
302 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_type_array_id)));
303 ce->add_call_info_here(_info);
304 ce->verify_oop_map(_info);
305 assert(_result->as_register() == rax, "result must in rax,");
306 __ jmp(_continuation);
307 }
308
309
310 // Implementation of NewObjectArrayStub
311
312 NewObjectArrayStub::NewObjectArrayStub(LIR_Opr klass_reg, LIR_Opr length, LIR_Opr result,
313 CodeEmitInfo* info, bool is_null_free) {
314 _klass_reg = klass_reg;
315 _result = result;
316 _length = length;
317 _info = new CodeEmitInfo(info);
318 _is_null_free = is_null_free;
319 }
320
321
322 void NewObjectArrayStub::emit_code(LIR_Assembler* ce) {
323 assert(__ rsp_offset() == 0, "frame size should be fixed");
324 __ bind(_entry);
325 assert(_length->as_register() == rbx, "length must in rbx,");
326 assert(_klass_reg->as_register() == rdx, "klass_reg must in rdx");
327 if (_is_null_free) {
328 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_flat_array_id)));
329 } else {
330 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::new_object_array_id)));
331 }
332 ce->add_call_info_here(_info);
333 ce->verify_oop_map(_info);
334 assert(_result->as_register() == rax, "result must in rax,");
335 __ jmp(_continuation);
336 }
337
338
339 // Implementation of MonitorAccessStubs
340
341 MonitorEnterStub::MonitorEnterStub(LIR_Opr obj_reg, LIR_Opr lock_reg, CodeEmitInfo* info, CodeStub* throw_imse_stub, LIR_Opr scratch_reg)
342 : MonitorAccessStub(obj_reg, lock_reg)
343 {
344 _info = new CodeEmitInfo(info);
345 _throw_imse_stub = throw_imse_stub;
346 _scratch_reg = scratch_reg;
347 if (_throw_imse_stub != NULL) {
348 assert(_scratch_reg != LIR_OprFact::illegalOpr, "must be");
349 }
350 }
351
352
353 void MonitorEnterStub::emit_code(LIR_Assembler* ce) {
354 assert(__ rsp_offset() == 0, "frame size should be fixed");
355 __ bind(_entry);
356 if (_throw_imse_stub != NULL) {
357 // When we come here, _obj_reg has already been checked to be non-null.
358 const int is_value_mask = markWord::inline_type_pattern;
359 Register mark = _scratch_reg->as_register();
360 __ movptr(mark, Address(_obj_reg->as_register(), oopDesc::mark_offset_in_bytes()));
361 __ andptr(mark, is_value_mask);
362 __ cmpl(mark, is_value_mask);
363 __ jcc(Assembler::equal, *_throw_imse_stub->entry());
364 }
365 ce->store_parameter(_obj_reg->as_register(), 1);
366 ce->store_parameter(_lock_reg->as_register(), 0);
367 Runtime1::StubID enter_id;
368 if (ce->compilation()->has_fpu_code()) {
369 enter_id = Runtime1::monitorenter_id;
370 } else {
371 enter_id = Runtime1::monitorenter_nofpu_id;
372 }
373 __ call(RuntimeAddress(Runtime1::entry_for(enter_id)));
374 ce->add_call_info_here(_info);
375 ce->verify_oop_map(_info);
376 __ jmp(_continuation);
377 }
378
379
380 void MonitorExitStub::emit_code(LIR_Assembler* ce) {
381 __ bind(_entry);
382 if (_compute_lock) {
383 // lock_reg was destroyed by fast unlocking attempt => recompute it
384 ce->monitor_address(_monitor_ix, _lock_reg);
385 }
386 ce->store_parameter(_lock_reg->as_register(), 0);
387 // note: non-blocking leaf routine => no call info needed
388 Runtime1::StubID exit_id;
389 if (ce->compilation()->has_fpu_code()) {
390 exit_id = Runtime1::monitorexit_id;
391 } else {
392 exit_id = Runtime1::monitorexit_nofpu_id;
393 }
394 __ call(RuntimeAddress(Runtime1::entry_for(exit_id)));
395 __ jmp(_continuation);
396 }
397
398
399 // Implementation of patching:
400 // - Copy the code at given offset to an inlined buffer (first the bytes, then the number of bytes)
401 // - Replace original code with a call to the stub
402 // At Runtime:
403 // - call to stub, jump to runtime
404 // - in runtime: preserve all registers (rspecially objects, i.e., source and destination object)
405 // - in runtime: after initializing class, restore original code, reexecute instruction
406
407 int PatchingStub::_patch_info_offset = -NativeGeneralJump::instruction_size;
408
409 void PatchingStub::align_patch_site(MacroAssembler* masm) {
410 // We're patching a 5-7 byte instruction on intel and we need to
411 // make sure that we don't see a piece of the instruction. It
412 // appears mostly impossible on Intel to simply invalidate other
413 // processors caches and since they may do aggressive prefetch it's
414 // very hard to make a guess about what code might be in the icache.
415 // Force the instruction to be double word aligned so that it
416 // doesn't span a cache line.
417 masm->align(align_up((int)NativeGeneralJump::instruction_size, wordSize));
418 }
419
420 void PatchingStub::emit_code(LIR_Assembler* ce) {
421 assert(NativeCall::instruction_size <= _bytes_to_copy && _bytes_to_copy <= 0xFF, "not enough room for call");
422
423 Label call_patch;
424
425 // static field accesses have special semantics while the class
426 // initializer is being run so we emit a test which can be used to
427 // check that this code is being executed by the initializing
428 // thread.
429 address being_initialized_entry = __ pc();
430 if (CommentedAssembly) {
431 __ block_comment(" patch template");
432 }
433 if (_id == load_klass_id) {
434 // produce a copy of the load klass instruction for use by the being initialized case
435 #ifdef ASSERT
436 address start = __ pc();
437 #endif
438 Metadata* o = NULL;
439 __ mov_metadata(_obj, o);
440 #ifdef ASSERT
441 for (int i = 0; i < _bytes_to_copy; i++) {
442 address ptr = (address)(_pc_start + i);
443 int a_byte = (*ptr) & 0xFF;
444 assert(a_byte == *start++, "should be the same code");
445 }
446 #endif
447 } else if (_id == load_mirror_id) {
448 // produce a copy of the load mirror instruction for use by the being
449 // initialized case
450 #ifdef ASSERT
451 address start = __ pc();
452 #endif
453 jobject o = NULL;
454 __ movoop(_obj, o);
455 #ifdef ASSERT
456 for (int i = 0; i < _bytes_to_copy; i++) {
457 address ptr = (address)(_pc_start + i);
458 int a_byte = (*ptr) & 0xFF;
459 assert(a_byte == *start++, "should be the same code");
460 }
461 #endif
462 } else {
463 // make a copy the code which is going to be patched.
464 for (int i = 0; i < _bytes_to_copy; i++) {
465 address ptr = (address)(_pc_start + i);
466 int a_byte = (*ptr) & 0xFF;
467 __ emit_int8(a_byte);
468 *ptr = 0x90; // make the site look like a nop
469 }
470 }
471
472 address end_of_patch = __ pc();
473 int bytes_to_skip = 0;
474 if (_id == load_mirror_id) {
475 int offset = __ offset();
476 if (CommentedAssembly) {
477 __ block_comment(" being_initialized check");
478 }
479 assert(_obj != noreg, "must be a valid register");
480 Register tmp = rax;
481 Register tmp2 = rbx;
482 __ push(tmp);
483 __ push(tmp2);
484 // Load without verification to keep code size small. We need it because
485 // begin_initialized_entry_offset has to fit in a byte. Also, we know it's not null.
486 __ movptr(tmp2, Address(_obj, java_lang_Class::klass_offset()));
487 __ get_thread(tmp);
488 __ cmpptr(tmp, Address(tmp2, InstanceKlass::init_thread_offset()));
489 __ pop(tmp2);
490 __ pop(tmp);
491 __ jcc(Assembler::notEqual, call_patch);
492
493 // access_field patches may execute the patched code before it's
494 // copied back into place so we need to jump back into the main
495 // code of the nmethod to continue execution.
496 __ jmp(_patch_site_continuation);
497
498 // make sure this extra code gets skipped
499 bytes_to_skip += __ offset() - offset;
500 }
501 if (CommentedAssembly) {
502 __ block_comment("patch data encoded as movl");
503 }
504 // Now emit the patch record telling the runtime how to find the
505 // pieces of the patch. We only need 3 bytes but for readability of
506 // the disassembly we make the data look like a movl reg, imm32,
507 // which requires 5 bytes
508 int sizeof_patch_record = 5;
509 bytes_to_skip += sizeof_patch_record;
510
511 // emit the offsets needed to find the code to patch
512 int being_initialized_entry_offset = __ pc() - being_initialized_entry + sizeof_patch_record;
513
514 __ emit_int8((unsigned char)0xB8);
515 __ emit_int8(0);
516 __ emit_int8(being_initialized_entry_offset);
517 __ emit_int8(bytes_to_skip);
518 __ emit_int8(_bytes_to_copy);
519 address patch_info_pc = __ pc();
520 assert(patch_info_pc - end_of_patch == bytes_to_skip, "incorrect patch info");
521
522 address entry = __ pc();
523 NativeGeneralJump::insert_unconditional((address)_pc_start, entry);
524 address target = NULL;
525 relocInfo::relocType reloc_type = relocInfo::none;
526 switch (_id) {
527 case access_field_id: target = Runtime1::entry_for(Runtime1::access_field_patching_id); break;
528 case load_klass_id: target = Runtime1::entry_for(Runtime1::load_klass_patching_id); reloc_type = relocInfo::metadata_type; break;
529 case load_mirror_id: target = Runtime1::entry_for(Runtime1::load_mirror_patching_id); reloc_type = relocInfo::oop_type; break;
530 case load_appendix_id: target = Runtime1::entry_for(Runtime1::load_appendix_patching_id); reloc_type = relocInfo::oop_type; break;
531 default: ShouldNotReachHere();
532 }
533 __ bind(call_patch);
534
535 if (CommentedAssembly) {
536 __ block_comment("patch entry point");
537 }
538 __ call(RuntimeAddress(target));
539 assert(_patch_info_offset == (patch_info_pc - __ pc()), "must not change");
540 ce->add_call_info_here(_info);
541 int jmp_off = __ offset();
542 __ jmp(_patch_site_entry);
543 // Add enough nops so deoptimization can overwrite the jmp above with a call
544 // and not destroy the world. We cannot use fat nops here, since the concurrent
545 // code rewrite may transiently create the illegal instruction sequence.
546 for (int j = __ offset() ; j < jmp_off + 5 ; j++ ) {
547 __ nop();
548 }
549 if (_id == load_klass_id || _id == load_mirror_id || _id == load_appendix_id) {
550 CodeSection* cs = __ code_section();
551 RelocIterator iter(cs, (address)_pc_start, (address)(_pc_start + 1));
552 relocInfo::change_reloc_info_for_address(&iter, (address) _pc_start, reloc_type, relocInfo::none);
553 }
554 }
555
556
557 void DeoptimizeStub::emit_code(LIR_Assembler* ce) {
558 __ bind(_entry);
559 ce->store_parameter(_trap_request, 0);
560 __ call(RuntimeAddress(Runtime1::entry_for(Runtime1::deoptimize_id)));
561 ce->add_call_info_here(_info);
562 DEBUG_ONLY(__ should_not_reach_here());
563 }
564
565
566 void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
567 address a;
568 if (_info->deoptimize_on_exception()) {
569 // Deoptimize, do not throw the exception, because it is probably wrong to do it here.
570 a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
571 } else {
572 a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
573 }
574
575 ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
576 __ bind(_entry);
577 __ call(RuntimeAddress(a));
578 ce->add_call_info_here(_info);
579 ce->verify_oop_map(_info);
580 debug_only(__ should_not_reach_here());
581 }
582
583
584 void SimpleExceptionStub::emit_code(LIR_Assembler* ce) {
585 assert(__ rsp_offset() == 0, "frame size should be fixed");
586
587 __ bind(_entry);
588 // pass the object on stack because all registers must be preserved
589 if (_obj->is_cpu_register()) {
590 ce->store_parameter(_obj->as_register(), 0);
591 }
592 __ call(RuntimeAddress(Runtime1::entry_for(_stub)));
593 ce->add_call_info_here(_info);
594 debug_only(__ should_not_reach_here());
595 }
596
597
598 void ArrayCopyStub::emit_code(LIR_Assembler* ce) {
599 //---------------slow case: call to native-----------------
600 __ bind(_entry);
601 // Figure out where the args should go
602 // This should really convert the IntrinsicID to the Method* and signature
603 // but I don't know how to do that.
604 //
605 VMRegPair args[5];
606 BasicType signature[5] = { T_OBJECT, T_INT, T_OBJECT, T_INT, T_INT};
607 SharedRuntime::java_calling_convention(signature, args, 5);
608
609 // push parameters
610 // (src, src_pos, dest, destPos, length)
611 Register r[5];
612 r[0] = src()->as_register();
613 r[1] = src_pos()->as_register();
614 r[2] = dst()->as_register();
615 r[3] = dst_pos()->as_register();
616 r[4] = length()->as_register();
617
618 // next registers will get stored on the stack
619 for (int i = 0; i < 5 ; i++ ) {
620 VMReg r_1 = args[i].first();
621 if (r_1->is_stack()) {
622 int st_off = r_1->reg2stack() * wordSize;
623 __ movptr (Address(rsp, st_off), r[i]);
624 } else {
625 assert(r[i] == args[i].first()->as_Register(), "Wrong register for arg ");
626 }
627 }
628
629 ce->align_call(lir_static_call);
630
631 ce->emit_static_call_stub();
632 if (ce->compilation()->bailed_out()) {
633 return; // CodeCache is full
634 }
635 AddressLiteral resolve(SharedRuntime::get_resolve_static_call_stub(),
636 relocInfo::static_call_type);
637 __ call(resolve);
638 ce->add_call_info_here(info());
639
640 #ifndef PRODUCT
641 if (PrintC1Statistics) {
642 __ incrementl(ExternalAddress((address)&Runtime1::_arraycopy_slowcase_cnt));
643 }
644 #endif
645
646 __ jmp(_continuation);
647 }
648
649 #undef __