-
Notifications
You must be signed in to change notification settings - Fork 2.1k
Expand file tree
/
Copy pathWasmOperations.cpp
More file actions
1835 lines (1604 loc) · 88.2 KB
/
Copy pathWasmOperations.cpp
File metadata and controls
1835 lines (1604 loc) · 88.2 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright (C) 2019-2024 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WasmOperations.h"
#include "DeferGC.h"
#include "ObjectAllocationProfile.h"
#if ENABLE(WEBASSEMBLY)
#include "ButterflyInlines.h"
#include "FrameTracers.h"
#include "IteratorOperations.h"
#include "JITExceptions.h"
#include "JSArrayBufferViewInlines.h"
#include "JSCJSValueInlines.h"
#include "JSGlobalObjectInlines.h"
#include "JSWebAssemblyArray.h"
#include "JSWebAssemblyException.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyInstance.h"
#include "JSWebAssemblyRuntimeError.h"
#include "JSWebAssemblyStruct.h"
#include "ProbeContext.h"
#include "ReleaseHeapAccessScope.h"
#include "WasmCallee.h"
#include "WasmCallingConvention.h"
#include "WasmContext.h"
#include "WasmMemory.h"
#include "WasmModuleInformation.h"
#include "WasmOMGPlan.h"
#include "WasmOSREntryData.h"
#include "WasmOSREntryPlan.h"
#include "WasmOperationsInlines.h"
#include "WasmWorklist.h"
#include <bit>
#include <wtf/DataLog.h>
#include <wtf/Locker.h>
#include <wtf/StdLibExtras.h>
IGNORE_WARNINGS_BEGIN("frame-address")
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
namespace JSC {
namespace Wasm {
namespace WasmOperationsInternal {
static constexpr bool verbose = false;
}
JSC_DEFINE_JIT_OPERATION(operationJSToWasmEntryWrapperBuildFrame, JSToWasmCallee*, (void* sp, CallFrame* callFrame, WebAssemblyFunction* function))
{
dataLogLnIf(WasmOperationsInternal::verbose, "operationJSToWasmEntryWrapperBuildFrame sp: ", RawPointer(sp), " fp: ", RawPointer(callFrame));
auto* globalObject = function->realm();
VM& vm = globalObject->vm();
if (function->taintedness() >= SourceTaintedOrigin::IndirectlyTainted)
vm.setMightBeExecutingTaintedCode();
WasmOperationPrologueCallFrameTracer tracer(vm, callFrame, OUR_RETURN_ADDRESS);
auto* callee = function->jsToWasmCallee();
ASSERT(function);
ASSERT(callee->compilationMode() == CompilationMode::JSToWasmMode);
ASSERT(&callee->rtt() == function->rtt());
ASSERT(callee->frameSize() + JSToWasmCallee::SpillStackSpaceAligned == (reinterpret_cast<uintptr_t>(callFrame) - reinterpret_cast<uintptr_t>(sp)));
dataLogLnIf(WasmOperationsInternal::verbose, "operationJSToWasmEntryWrapperBuildFrame setting callee: ", RawHex(CalleeBits::encodeNativeCallee(callee)));
dataLogLnIf(WasmOperationsInternal::verbose, "operationJSToWasmEntryWrapperBuildFrame wasm callee: ", RawHex(callee->wasmCallee().encodedBits()));
auto scope = DECLARE_THROW_SCOPE(vm);
auto calleeSPOffsetFromFP = -(static_cast<intptr_t>(callee->frameSize()) + JSToWasmCallee::SpillStackSpaceAligned - JSToWasmCallee::RegisterStackSpaceAligned);
const RTT& signature = *function->rtt();
if (signature.argumentsOrResultsIncludeV128() || signature.argumentsOrResultsIncludeExnref()) [[unlikely]] {
throwVMTypeError(globalObject, scope, Wasm::errorMessageForExceptionType(Wasm::ExceptionType::TypeErrorInvalidValueUse));
OPERATION_RETURN(scope, callee);
}
auto access = [sp, callFrame]<typename V>(auto* arr, int i) -> V* {
dataLogLnIf(WasmOperationsInternal::verbose, "fp[", (&reinterpret_cast<uint8_t*>(arr)[i / sizeof(uint8_t)] - reinterpret_cast<uint8_t*>(callFrame)), "] sp[", (&reinterpret_cast<uint8_t*>(arr)[i / sizeof(uint8_t)] - reinterpret_cast<uint8_t*>(sp)), "](", RawHex(reinterpret_cast<V*>(arr)[i / sizeof(V)]), ")");
return &reinterpret_cast<V*>(arr)[i / sizeof(V)];
};
CallInformation wasmFrameConvention = wasmCallingConvention().callInformationFor(signature, CallRole::Caller);
uint64_t* registerSpace = reinterpret_cast<uint64_t*>(sp);
for (unsigned i = 0; i < signature.argumentCount(); ++i) {
JSValue jsArg = callFrame->argument(i);
Type type = signature.argumentType(i);
dataLogLnIf(WasmOperationsInternal::verbose, "Arg ", i, " ", wasmFrameConvention.params[i].location);
uint64_t value = toWebAssemblyValue(globalObject, type, jsArg);
OPERATION_RETURN_IF_EXCEPTION(scope, callee);
if (wasmFrameConvention.params[i].location.isStackArgument()) {
auto dst = wasmFrameConvention.params[i].location.offsetFromSP() + calleeSPOffsetFromFP;
if (type.isI32() || type.isF32())
*access.operator()<uint32_t>(callFrame, dst) = static_cast<uint32_t>(value);
else
*access.operator()<uint64_t>(callFrame, dst) = value;
} else {
int dst = 0;
if (wasmFrameConvention.params[i].location.isFPR())
dst = GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(wasmFrameConvention.params[i].location.fpr()) * bytesForWidth(Width::Width64);
else
dst = GPRInfo::toArgumentIndex(wasmFrameConvention.params[i].location.jsr().payloadGPR()) * sizeof(UCPURegister);
ASSERT(dst >= 0);
dataLogLnIf(WasmOperationsInternal::verbose, "* Register Arg ", i, " ", dst);
if (type.isI32() || type.isF32())
value = static_cast<uint64_t>(static_cast<uint32_t>(value));
*access.operator()<uint64_t>(registerSpace, dst) = value;
}
}
OPERATION_RETURN(scope, callee);
}
// Marshalls wasm return values into JS: a single JSValue for one result, or a JSArray for multi-value.
JSC_DEFINE_JIT_OPERATION(operationJSToWasmEntryWrapperBuildReturnFrame, EncodedJSValue, (void* sp, CallFrame* callFrame))
{
dataLogLnIf(WasmOperationsInternal::verbose, "operationJSToWasmEntryWrapperBuildReturnFrame sp: ", RawPointer(sp), " fp: ", RawPointer(callFrame));
auto* instance = callFrame->wasmInstance();
ASSERT(instance);
ASSERT(instance->realm());
VM& vm = instance->vm();
WasmOperationPrologueCallFrameTracer tracer(vm, callFrame, OUR_RETURN_ADDRESS);
uint64_t* registerSpace = reinterpret_cast<uint64_t*>(sp);
auto* callee = uncheckedDowncast<JSToWasmCallee>(uncheckedDowncast<Wasm::Callee>(callFrame->callee().asNativeCallee()));
ASSERT(callee->compilationMode() == CompilationMode::JSToWasmMode);
auto scope = DECLARE_THROW_SCOPE(vm);
const RTT& signature = callee->rtt();
auto access = [sp, callFrame]<typename V>(auto* arr, int i) -> V* {
dataLogLnIf(WasmOperationsInternal::verbose, "fp[", (&reinterpret_cast<uint8_t*>(arr)[i / sizeof(uint8_t)] - reinterpret_cast<uint8_t*>(callFrame)), "] sp[", (&reinterpret_cast<uint8_t*>(arr)[i / sizeof(uint8_t)] - reinterpret_cast<uint8_t*>(sp)), "](", reinterpret_cast<V*>(arr)[i / sizeof(V)], ")");
return &reinterpret_cast<V*>(arr)[i / sizeof(V)];
};
if (signature.returnsVoid())
OPERATION_RETURN(scope, JSValue::encode(jsUndefined()));
if (signature.returnCount() == 1) {
if constexpr (WasmOperationsInternal::verbose) {
CallInformation wasmFrameConvention = wasmCallingConvention().callInformationFor(signature, CallRole::Caller);
dataLogLn("* Register Return ", wasmFrameConvention.results[0].location);
}
JSValue result;
if (signature.returnType(0).isI32())
result = jsNumber(*access.operator()<int32_t>(registerSpace, 0));
else if (signature.returnType(0).isI64()) {
result = JSBigInt::makeHeapBigIntOrBigInt32(instance->realm(), *access.operator()<int64_t>(registerSpace, 0));
OPERATION_RETURN_IF_EXCEPTION(scope, encodedJSValue());
} else if (signature.returnType(0).isF32())
result = jsNumber(purifyNaN(*access.operator()<float>(registerSpace, GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + 0)));
else if (signature.returnType(0).isF64())
result = jsNumber(purifyNaN(*access.operator()<double>(registerSpace, GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + 0)));
else if (isRefType(signature.returnType(0)))
result = *access.operator()<JSValue>(registerSpace, 0);
else
// the JIT thunk emits a breakpoint here, so we can just fail our assertion as well
RELEASE_ASSERT_NOT_REACHED();
OPERATION_RETURN(scope, JSValue::encode(result));
}
CallInformation wasmFrameConvention = wasmCallingConvention().callInformationFor(signature, CallRole::Caller);
IndexingType indexingType = ArrayWithUndecided;
for (unsigned i = 0; i < signature.returnCount(); ++i) {
Type type = signature.returnType(i);
switch (type.kind()) {
case TypeKind::I32:
indexingType = leastUpperBoundOfIndexingTypes(indexingType, ArrayWithInt32);
break;
case TypeKind::F32:
case TypeKind::F64:
indexingType = leastUpperBoundOfIndexingTypes(indexingType, ArrayWithDouble);
break;
default:
indexingType = leastUpperBoundOfIndexingTypes(indexingType, ArrayWithContiguous);
break;
}
}
JSGlobalObject* globalObject = instance->realm();
JSArray* resultArray = JSArray::tryCreate(vm, globalObject->arrayStructureForIndexingTypeDuringAllocation(indexingType), signature.returnCount());
if (!resultArray) [[unlikely]] {
throwOutOfMemoryError(globalObject, scope);
OPERATION_RETURN(scope, encodedJSValue());
}
// calleeSP = sp + RegisterStackSpaceAligned (we only subtracted RegisterStackSpace from callee's actual SP)
// This is correct even after tail calls, where the callee's frame size may differ from the original.
auto calleeSPOffsetFromFP = reinterpret_cast<intptr_t>(sp)
+ static_cast<intptr_t>(JSToWasmCallee::RegisterStackSpaceAligned)
- reinterpret_cast<intptr_t>(callFrame);
for (unsigned i = 0; i < signature.returnCount(); ++i) {
ValueLocation loc = wasmFrameConvention.results[i].location;
Type type = signature.returnType(i);
JSValue result;
if (loc.isGPR() || loc.isFPR()) {
switch (type.kind()) {
case TypeKind::I32:
result = jsNumber(*access.operator()<int32_t>(registerSpace, GPRInfo::toArgumentIndex(loc.jsr().payloadGPR()) * sizeof(UCPURegister)));
break;
case TypeKind::I64:
result = JSBigInt::makeHeapBigIntOrBigInt32(globalObject, *access.operator()<int64_t>(registerSpace, GPRInfo::toArgumentIndex(loc.jsr().payloadGPR()) * sizeof(UCPURegister)));
OPERATION_RETURN_IF_EXCEPTION(scope, encodedJSValue());
break;
case TypeKind::F32:
result = jsNumber(purifyNaN(*access.operator()<float>(registerSpace, GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(loc.fpr()) * bytesForWidth(Width::Width64))));
break;
case TypeKind::F64:
result = jsNumber(purifyNaN(*access.operator()<double>(registerSpace, GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(loc.fpr()) * bytesForWidth(Width::Width64))));
break;
default:
result = *access.operator()<JSValue>(registerSpace, GPRInfo::toArgumentIndex(loc.jsr().payloadGPR()) * sizeof(UCPURegister));
break;
}
} else {
switch (type.kind()) {
case TypeKind::I32:
result = jsNumber(*access.operator()<int32_t>(callFrame, calleeSPOffsetFromFP + loc.offsetFromSP()));
break;
case TypeKind::I64:
result = JSBigInt::makeHeapBigIntOrBigInt32(globalObject, *access.operator()<int64_t>(callFrame, calleeSPOffsetFromFP + loc.offsetFromSP()));
OPERATION_RETURN_IF_EXCEPTION(scope, encodedJSValue());
break;
case TypeKind::F32:
result = jsNumber(purifyNaN(*access.operator()<float>(callFrame, calleeSPOffsetFromFP + loc.offsetFromSP())));
break;
case TypeKind::F64:
result = jsNumber(purifyNaN(*access.operator()<double>(callFrame, calleeSPOffsetFromFP + loc.offsetFromSP())));
break;
default:
result = *access.operator()<JSValue>(callFrame, calleeSPOffsetFromFP + loc.offsetFromSP());
break;
}
}
resultArray->putDirectIndex(globalObject, i, result);
OPERATION_RETURN_IF_EXCEPTION(scope, encodedJSValue());
}
OPERATION_RETURN(scope, JSValue::encode(resultArray));
}
JSC_DEFINE_NOEXCEPT_JIT_OPERATION(operationGetWasmCalleeStackSize, UCPUStrictInt32, (JSWebAssemblyInstance*, WasmCallableFunction* functionInfo))
{
const RTT& signature = *static_cast<WasmOrJSImportableFunctionCallLinkInfo*>(functionInfo)->rtt;
unsigned argCount = signature.argumentCount();
const auto& wasmCC = wasmCallingConvention();
CallInformation wasmCallInfo = wasmCC.callInformationFor(signature, CallRole::Callee);
RegisterAtOffsetList savedResultRegisters = wasmCallInfo.computeResultsOffsetList();
const unsigned numberOfParameters = argCount + 1; // There is a "this" argument.
const unsigned numberOfRegsForCall = CallFrame::headerSizeInRegisters + roundArgumentCountToAlignFrame(numberOfParameters);
ASSERT(!(numberOfRegsForCall % stackAlignmentRegisters()));
const unsigned numberOfBytesForCall = numberOfRegsForCall * sizeof(Register) - sizeof(CallerFrameAndPC);
const unsigned numberOfBytesForSavedResults = savedResultRegisters.sizeOfAreaInBytes();
const unsigned stackOffset = WTF::roundUpToMultipleOf<stackAlignmentBytes()>(std::max(numberOfBytesForCall, numberOfBytesForSavedResults));
return toUCPUStrictInt32(stackOffset);
}
JSC_DEFINE_JIT_OPERATION(operationWasmToJSExitMarshalArguments, void, (void* sp, CallFrame* callFrame, void* argumentRegisters, JSWebAssemblyInstance* instance))
{
auto access = []<typename V>(auto* arr, int i) -> V* {
return &reinterpret_cast<V*>(arr)[i / sizeof(V)];
};
// We need to set up them immediately before potentially throwing anything.
auto singletonCallee = CalleeBits::boxNativeCallee(&WasmToJSCallee::singleton());
*access.operator()<uintptr_t>(callFrame, CallFrameSlot::codeBlock * sizeof(Register)) = std::bit_cast<uintptr_t>(instance);
*access.operator()<uintptr_t>(callFrame, CallFrameSlot::callee * sizeof(Register)) = std::bit_cast<uintptr_t>(singletonCallee);
CallFrame* calleeFrame = std::bit_cast<CallFrame*>(reinterpret_cast<uintptr_t>(sp) - sizeof(CallerFrameAndPC));
ASSERT(instance);
JSGlobalObject* globalObject = instance->realm();
ASSERT(globalObject);
VM& vm = instance->vm();
WasmOperationPrologueCallFrameTracer tracer(vm, callFrame, OUR_RETURN_ADDRESS);
auto scope = DECLARE_THROW_SCOPE(vm);
auto* importableFunction = *access.operator()<WasmOrJSImportableFunctionCallLinkInfo*>(callFrame, WasmToJSCallableFunctionSlot);
const RTT& signature = *importableFunction->rtt;
unsigned argCount = signature.argumentCount();
if (signature.argumentsOrResultsIncludeV128() || signature.argumentsOrResultsIncludeExnref()) [[unlikely]] {
throwVMTypeError(globalObject, scope, Wasm::errorMessageForExceptionType(Wasm::ExceptionType::TypeErrorInvalidValueUse));
OPERATION_RETURN(scope);
}
const auto& wasmCC = wasmCallingConvention().callInformationFor(signature, CallRole::Callee);
const auto& jsCC = jsCallingConvention().callInformationFor(signature, CallRole::Callee);
for (unsigned argNum = 0; argNum < argCount; ++argNum) {
Type argType = signature.argumentType(argNum);
auto wasmParam = wasmCC.params[argNum].location;
auto dst = jsCC.params[argNum].location.offsetFromFP();
switch (argType.kind()) {
case TypeKind::Void:
case TypeKind::Func:
case TypeKind::Struct:
case TypeKind::Structref:
case TypeKind::Array:
case TypeKind::Arrayref:
case TypeKind::Eqref:
case TypeKind::Anyref:
case TypeKind::Noexnref:
case TypeKind::Noneref:
case TypeKind::Nofuncref:
case TypeKind::Noexternref:
case TypeKind::I31ref:
case TypeKind::Rec:
case TypeKind::Sub:
case TypeKind::Subfinal:
case TypeKind::V128:
RELEASE_ASSERT_NOT_REACHED();
case TypeKind::RefNull:
case TypeKind::Ref:
case TypeKind::Externref:
case TypeKind::Funcref:
case TypeKind::Exnref:
case TypeKind::I32: {
if (wasmParam.isStack()) {
uint64_t raw = *access.operator()<UCPURegister>(callFrame, wasmParam.offsetFromFP());
if (argType.isI32())
*access.operator()<uint64_t>(calleeFrame, dst) = static_cast<uint32_t>(raw) | JSValue::NumberTag;
else
*access.operator()<uint64_t>(calleeFrame, dst) = raw;
} else {
auto raw = *access.operator()<UCPURegister>(argumentRegisters, GPRInfo::toArgumentIndex(wasmParam.jsr().payloadGPR()) * sizeof(UCPURegister));
if (argType.isI32())
*access.operator()<uint64_t>(calleeFrame, dst) = static_cast<uint32_t>(raw) | JSValue::NumberTag;
else
*access.operator()<uint64_t>(calleeFrame, dst) = raw;
}
break;
}
case TypeKind::I64: {
if (wasmParam.isStack()) {
auto result = JSBigInt::makeHeapBigIntOrBigInt32(globalObject, *access.operator()<int64_t>(callFrame, wasmParam.offsetFromFP()));
OPERATION_RETURN_IF_EXCEPTION(scope);
*access.operator()<uint64_t>(calleeFrame, dst) = JSValue::encode(result);
} else {
auto result = JSBigInt::makeHeapBigIntOrBigInt32(globalObject, *access.operator()<int64_t>(argumentRegisters, GPRInfo::toArgumentIndex(wasmParam.jsr().payloadGPR()) * sizeof(UCPURegister)));
OPERATION_RETURN_IF_EXCEPTION(scope);
*access.operator()<uint64_t>(calleeFrame, dst) = JSValue::encode(result);
}
break;
}
case TypeKind::F32: {
float val;
if (wasmParam.isStack())
val = *access.operator()<float>(callFrame, wasmParam.offsetFromFP());
else
val = *access.operator()<float>(argumentRegisters, GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(wasmParam.fpr()) * bytesForWidth(Width::Width64));
double marshalled = purifyNaN(val);
uint64_t raw = std::bit_cast<uint64_t>(marshalled);
raw += JSValue::DoubleEncodeOffset;
*access.operator()<uint64_t>(calleeFrame, dst) = raw;
break;
}
case TypeKind::F64:
double val;
if (wasmParam.isStack())
val = *access.operator()<double>(callFrame, wasmParam.offsetFromFP());
else
val = *access.operator()<double>(argumentRegisters, GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(wasmParam.fpr()) * bytesForWidth(Width::Width64));
double marshalled = purifyNaN(val);
uint64_t raw = std::bit_cast<uint64_t>(marshalled);
raw += JSValue::DoubleEncodeOffset;
*access.operator()<uint64_t>(calleeFrame, dst) = raw;
break;
}
}
// store this argument
*access.operator()<uint64_t>(calleeFrame, CallFrameSlot::thisArgument * static_cast<int>(sizeof(Register))) = JSValue::encode(jsUndefined());
// materializeImportJSCell and store
*access.operator()<uint64_t>(calleeFrame, CallFrameSlot::callee * sizeof(Register)) = JSValue::encode(importableFunction->importFunction.get());
*access.operator()<uint32_t>(calleeFrame, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + LowWordOffset) = argCount + 1; // including this = +1
OPERATION_RETURN(scope);
}
ALWAYS_INLINE void assertCalleeIsReferenced(CallFrame* frame, JSWebAssemblyInstance* instance)
{
#if ASSERT_ENABLED
CalleeGroup& calleeGroup = *instance->calleeGroup();
Wasm::Callee* callee = uncheckedDowncast<Wasm::Callee>(frame->callee().asNativeCallee());
TriState status;
{
Locker locker { calleeGroup.m_lock };
status = calleeGroup.calleeIsReferenced(locker, callee);
}
if (status == TriState::Indeterminate)
ASSERT(instance->vm().heap.isWasmCalleePendingDestruction(*callee));
else
ASSERT(status == TriState::True);
#else
UNUSED_PARAM(frame);
UNUSED_PARAM(instance);
#endif
}
JSC_DEFINE_JIT_OPERATION(operationWasmToJSExitMarshalReturnValues, void, (void* sp, CallFrame* callFrame, JSWebAssemblyInstance* instance))
{
auto access = []<typename V>(auto* arr, int i) -> V* {
return &reinterpret_cast<V*>(arr)[i / sizeof(V)];
};
void* registerSpace = sp;
assertCalleeIsReferenced(callFrame, instance);
WasmOperationPrologueCallFrameTracer tracer(instance->vm(), callFrame, OUR_RETURN_ADDRESS);
auto scope = DECLARE_THROW_SCOPE(instance->vm());
auto* importableFunction = *access.operator()<WasmOrJSImportableFunctionCallLinkInfo*>(callFrame, WasmToJSCallableFunctionSlot);
const RTT& signature = *importableFunction->rtt;
auto* globalObject = instance->realm();
auto wasmCC = wasmCallingConvention().callInformationFor(signature, CallRole::Callee);
JSValue returned = *(reinterpret_cast<JSValue*>(registerSpace));
if (!signature.returnCount())
OPERATION_RETURN(scope);
if (signature.returnCount() == 1) {
const auto& returnType = signature.returnType(0);
switch (returnType.kind()) {
case TypeKind::I32: {
if (!returned.isNumber() || !returned.isInt32()) {
// slow path
uint32_t result = JSValue::decode(std::bit_cast<EncodedJSValue>(returned)).toInt32(globalObject);
OPERATION_RETURN_IF_EXCEPTION(scope);
*access.operator()<uint64_t>(registerSpace, 0) = static_cast<uint64_t>(result);
} else {
uint64_t result = static_cast<uint64_t>(*access.operator()<uint32_t>(registerSpace, 0));
*access.operator()<uint64_t>(registerSpace, 0) = result;
}
break;
}
case TypeKind::I64: {
uint64_t result = JSValue::decode(std::bit_cast<EncodedJSValue>(returned)).toBigInt64(globalObject);
OPERATION_RETURN_IF_EXCEPTION(scope);
*access.operator()<uint64_t>(registerSpace, 0) = result;
break;
}
case TypeKind::F32: {
FPRReg dest = wasmCC.results[0].location.fpr();
auto offset = GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(dest) * bytesForWidth(Width::Width64);
if (returned.isNumber()) {
if (returned.isInt32()) {
float result = static_cast<float>(*access.operator()<int32_t>(registerSpace, 0));
*access.operator()<float>(registerSpace, offset) = result;
} else {
uint64_t intermediate = *access.operator()<uint64_t>(registerSpace, 0) + JSValue::NumberTag;
double d = std::bit_cast<double>(intermediate);
*access.operator()<uint64_t>(registerSpace, offset) = static_cast<uint64_t>(std::bit_cast<uint32_t>(static_cast<float>(d)));
}
} else {
float result = static_cast<float>(JSValue::decode(std::bit_cast<EncodedJSValue>(returned)).toNumber(globalObject));
OPERATION_RETURN_IF_EXCEPTION(scope);
*access.operator()<uint64_t>(registerSpace, offset) = static_cast<uint64_t>(std::bit_cast<uint32_t>(result));
}
break;
}
case TypeKind::F64: {
FPRReg dest = wasmCC.results[0].location.fpr();
auto offset = GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(dest) * bytesForWidth(Width::Width64);
if (returned.isNumber()) {
if (returned.isInt32()) {
double result = static_cast<double>(*access.operator()<int32_t>(registerSpace, 0));
*access.operator()<double>(registerSpace, offset) = result;
} else {
uint64_t intermediate = *access.operator()<uint64_t>(registerSpace, 0) + JSValue::NumberTag;
double d = std::bit_cast<double>(intermediate);
*access.operator()<double>(registerSpace, offset) = d;
}
} else {
double result = static_cast<double>(JSValue::decode(std::bit_cast<EncodedJSValue>(returned)).toNumber(globalObject));
OPERATION_RETURN_IF_EXCEPTION(scope);
*access.operator()<double>(registerSpace, offset) = result;
}
break;
}
default: {
if (Wasm::isRefType(returnType)) {
JSValue value = JSValue::decode(std::bit_cast<EncodedJSValue>(returned));
if (value.isNull() && !returnType.isNullable()) [[unlikely]] {
throwTypeError(globalObject, scope, "Host function incorrectly returned null for a nonnullable reference type"_s);
OPERATION_RETURN(scope);
}
if (Wasm::isExternref(returnType)) {
// Do nothing.
} else if (Wasm::isFuncref(returnType)) {
// operationConvertToFuncref
WebAssemblyFunction* wasmFunction = nullptr;
WebAssemblyWrapperFunction* wasmWrapperFunction = nullptr;
if (!isWebAssemblyHostFunction(value, wasmFunction, wasmWrapperFunction) && !value.isNull()) [[unlikely]] {
throwTypeError(globalObject, scope, "Funcref value is not a function"_s);
OPERATION_RETURN(scope);
}
if (isRefWithTypeIndex(returnType) && !value.isNull()) {
Wasm::TypeIndex paramIndex = returnType.index();
Wasm::TypeIndex argIndex = (wasmFunction ? wasmFunction->rtt() : wasmWrapperFunction->rtt())->asTypeIndex();
if (paramIndex != argIndex) {
throwVMTypeError(globalObject, scope, "Argument function did not match the reference type"_s);
OPERATION_RETURN(scope);
}
}
// Validation only: value not modified so write back not needed.
} else {
// operationConvertToAnyref
value = Wasm::internalizeExternref(value);
if (!Wasm::TypeInformation::isReferenceValueAssignable(value, returnType.isNullable(), returnType.index())) [[unlikely]] {
throwTypeError(globalObject, scope, "Argument value did not match the reference type"_s);
OPERATION_RETURN(scope);
}
*access.operator()<uint64_t>(registerSpace, 0) = std::bit_cast<uint64_t>(value);
}
} else
RELEASE_ASSERT_NOT_REACHED();
}
}
OPERATION_RETURN(scope);
}
unsigned iterationCount = 0;
MarkedArgumentBuffer buffer;
buffer.ensureCapacity(signature.returnCount());
forEachInIterable(globalObject, returned, [&](VM&, JSGlobalObject*, JSValue value) -> void {
if (buffer.size() < signature.returnCount()) {
buffer.append(value);
if (buffer.hasOverflowed()) [[unlikely]]
throwOutOfMemoryError(globalObject, scope);
}
++iterationCount;
});
OPERATION_RETURN_IF_EXCEPTION(scope);
if (buffer.hasOverflowed()) {
throwOutOfMemoryError(globalObject, scope, "JS results to Wasm are too large"_s);
OPERATION_RETURN(scope);
}
if (iterationCount != signature.returnCount()) {
throwVMTypeError(globalObject, scope, "Incorrect number of values returned to Wasm from JS"_s);
OPERATION_RETURN(scope);
}
for (unsigned index = 0; index < buffer.size(); ++index) {
JSValue value = buffer.at(index);
uint64_t unboxedValue = 0;
const auto& returnType = signature.returnType(index);
switch (returnType.kind()) {
case TypeKind::I32:
unboxedValue = static_cast<uint32_t>(value.toInt32(globalObject));
OPERATION_RETURN_IF_EXCEPTION(scope);
break;
case TypeKind::I64:
unboxedValue = value.toBigInt64(globalObject);
OPERATION_RETURN_IF_EXCEPTION(scope);
break;
case TypeKind::F32:
unboxedValue = std::bit_cast<uint32_t>(value.toFloat(globalObject));
OPERATION_RETURN_IF_EXCEPTION(scope);
break;
case TypeKind::F64:
unboxedValue = std::bit_cast<uint64_t>(value.toNumber(globalObject));
OPERATION_RETURN_IF_EXCEPTION(scope);
break;
default: {
if (Wasm::isRefType(returnType)) {
if (value.isNull() && !returnType.isNullable()) [[unlikely]] {
throwTypeError(globalObject, scope, "Host function incorrectly returned null for a nonnullable reference type"_s);
OPERATION_RETURN(scope);
}
if (isExternref(returnType)) {
// Do nothing.
} else if (isFuncref(returnType)) {
WebAssemblyFunction* wasmFunction = nullptr;
WebAssemblyWrapperFunction* wasmWrapperFunction = nullptr;
if (!isWebAssemblyHostFunction(value, wasmFunction, wasmWrapperFunction) && !value.isNull()) [[unlikely]] {
throwTypeError(globalObject, scope, "Argument value did not match the reference type"_s);
OPERATION_RETURN(scope);
}
if (Wasm::isRefWithTypeIndex(returnType) && !value.isNull()) {
Wasm::TypeIndex paramIndex = returnType.index();
Wasm::TypeIndex argIndex = (wasmFunction ? wasmFunction->rtt() : wasmWrapperFunction->rtt())->asTypeIndex();
if (paramIndex != argIndex) {
throwTypeError(globalObject, scope, "Argument value did not match the reference type"_s);
OPERATION_RETURN(scope);
}
}
} else {
value = Wasm::internalizeExternref(value);
if (!Wasm::TypeInformation::isReferenceValueAssignable(value, returnType.isNullable(), returnType.index())) [[unlikely]] {
throwTypeError(globalObject, scope, "Argument value did not match the reference type"_s);
OPERATION_RETURN(scope);
}
}
} else
RELEASE_ASSERT_NOT_REACHED();
unboxedValue = std::bit_cast<uint64_t>(value);
}
}
auto rep = wasmCC.results[index];
if (rep.location.isGPR()) {
auto offset = GPRInfo::toArgumentIndex(rep.location.jsr().payloadGPR()) * sizeof(UCPURegister);
*access.operator()<uint64_t>(registerSpace, offset) = unboxedValue;
} else if (rep.location.isFPR()) {
auto offset = GPRInfo::numberOfArgumentRegisters * sizeof(UCPURegister) + FPRInfo::toArgumentIndex(rep.location.fpr()) * bytesForWidth(Width::Width64);
*access.operator()<uint64_t>(registerSpace, offset) = unboxedValue;
} else
*access.operator()<uint64_t>(callFrame, rep.location.offsetFromFP()) = unboxedValue;
}
OPERATION_RETURN(scope);
}
#if ENABLE(WEBASSEMBLY_OMGJIT)
static bool shouldTriggerOMGCompile(TierUpCount& tierUp, OMGCallee* replacement, FunctionCodeIndex functionIndex)
{
if (!OMGPlan::ensureGlobalOMGAllowlist().containsWasmFunction(functionIndex)) {
dataLogLnIf(Options::verboseOSR(), "\tNot optimizing ", functionIndex, " as it's not in the allow list.");
tierUp.deferIndefinitely();
return false;
}
if (!replacement && !tierUp.checkIfOptimizationThresholdReached()) {
dataLogLnIf(Options::verboseOSR(), "\tdelayOMGCompile counter = ", tierUp, " for ", functionIndex);
dataLogLnIf(Options::verboseOSR(), "\tChoosing not to OMG-optimize ", functionIndex, " yet.");
return false;
}
return true;
}
static void triggerOMGReplacementCompile(TierUpCount& tierUp, JSWebAssemblyInstance* instance, Wasm::CalleeGroup& calleeGroup, FunctionCodeIndex functionIndex)
{
MemoryMode memoryMode = instance->memory0Mode();
bool compile = false;
{
Locker locker { tierUp.getLock() };
switch (tierUp.compilationStatusForOMG(memoryMode)) {
case TierUpCount::CompilationStatus::StartCompilation:
tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationResult::CompilationDeferred);
return;
case TierUpCount::CompilationStatus::NotCompiled:
compile = true;
tierUp.setCompilationStatusForOMG(memoryMode, TierUpCount::CompilationStatus::StartCompilation);
break;
case TierUpCount::CompilationStatus::Compiled:
tierUp.optimizeSoon(functionIndex);
return;
default:
break;
}
}
if (compile) {
dataLogLnIf(Options::verboseOSR(), "\ttriggerOMGReplacement for ", functionIndex);
// We need to compile the code.
Ref<Plan> plan = adoptRef(*new OMGPlan(instance->vm(), Ref<Wasm::Module>(instance->module()), functionIndex, calleeGroup.mode(), Plan::dontFinalize()));
ensureWorklist().enqueue(plan.copyRef());
if (!Options::useConcurrentJIT()) [[unlikely]]
plan->waitForCompletion();
else
tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationResult::CompilationDeferred);
}
}
// loadValuesIntoBuffer assumes context saved vector-width FPRs.
void loadValuesIntoBuffer(Probe::Context& context, const StackMap& values, Wasm::Context::ScratchBufferEntry* buffer)
{
constexpr bool verbose = false || WasmOperationsInternal::verbose;
dataLogLnIf(verbose, "loadValuesIntoBuffer: values.size() = ", values.size());
for (unsigned index = 0; index < values.size(); ++index) {
const OSREntryValue& value = values[index];
dataLogLnIf(Options::verboseOSR() || verbose, "OMG OSR entry values[", index, "] ", value.type(), " ", value);
if (value.isGPR()) {
switch (value.type().kind()) {
case B3::Float:
case B3::Double:
RELEASE_ASSERT_NOT_REACHED();
default:
*std::bit_cast<uint64_t*>(buffer + index) = context.gpr(value.gpr());
}
dataLogLnIf(verbose, "GPR for value ", index, " ", value.gpr(), " = ", context.gpr(value.gpr()));
} else if (value.isFPR()) {
switch (value.type().kind()) {
case B3::Float:
case B3::Double:
dataLogLnIf(verbose, "FPR for value ", index, " ", value.fpr(), " = ", context.fpr(value.fpr()));
*std::bit_cast<double*>(buffer + index) = context.fpr(value.fpr());
break;
case B3::V128:
#if CPU(X86_64) || CPU(ARM64)
dataLogLnIf(verbose, "Vector FPR for value ", index, " ", value.fpr(), " = ", context.vector(value.fpr()));
*std::bit_cast<v128_t*>(buffer + index) = context.vector(value.fpr());
#else
UNREACHABLE_FOR_PLATFORM();
#endif
break;
default:
RELEASE_ASSERT_NOT_REACHED();
}
} else if (value.isConstant()) {
switch (value.type().kind()) {
case B3::Float:
*std::bit_cast<float*>(buffer + index) = value.floatValue();
break;
case B3::Double:
*std::bit_cast<double*>(buffer + index) = value.doubleValue();
break;
case B3::V128:
RELEASE_ASSERT_NOT_REACHED();
break;
default:
*std::bit_cast<uint64_t*>(buffer + index) = value.value();
}
} else if (value.isStack()) {
auto* baseLoad = std::bit_cast<uint8_t*>(context.fp()) + value.offsetFromFP();
auto* baseStore = std::bit_cast<uint8_t*>(buffer + index);
if (value.type().isFloat() || value.type().isVector()) {
dataLogLnIf(verbose, "Stack float or vector for value ", index, " fp offset ", value.offsetFromFP(), " = ",
*std::bit_cast<v128_t*>(baseLoad),
" or double ", *std::bit_cast<double*>(baseLoad));
} else
dataLogLnIf(verbose, "Stack for value ", index, " fp[", value.offsetFromFP(), "] = ", RawHex(*std::bit_cast<uint64_t*>(baseLoad)), " ", static_cast<int32_t>(*std::bit_cast<uint64_t*>(baseLoad)), " ", *std::bit_cast<int64_t*>(baseLoad));
switch (value.type().kind()) {
case B3::Float:
*std::bit_cast<float*>(baseStore) = *std::bit_cast<float*>(baseLoad);
break;
case B3::Double:
*std::bit_cast<double*>(baseStore) = *std::bit_cast<double*>(baseLoad);
break;
case B3::V128:
*std::bit_cast<v128_t*>(baseStore) = *std::bit_cast<v128_t*>(baseLoad);
break;
default:
*std::bit_cast<uint64_t*>(baseStore) = *std::bit_cast<uint64_t*>(baseLoad);
break;
}
} else
RELEASE_ASSERT_NOT_REACHED();
}
}
SUPPRESS_ASAN
static void doOSREntry(JSWebAssemblyInstance* instance, Probe::Context& context, BBQCallee& callee, OMGOSREntryCallee& osrEntryCallee, OSREntryData& osrEntryData)
{
auto returnWithoutOSREntry = [&] {
context.gpr(GPRInfo::nonPreservedNonArgumentGPR0) = 0;
};
RELEASE_ASSERT(osrEntryCallee.osrEntryScratchBufferSize() == osrEntryData.values().size());
auto* buffer = instance->vm().wasmContext.scratchBufferForSize(osrEntryCallee.osrEntryScratchBufferSize());
if (!buffer)
return returnWithoutOSREntry();
dataLogLnIf(Options::verboseOSR(), callee, ": OMG OSR entry: functionCodeIndex=", osrEntryData.functionIndex(), " got entry callee ", RawPointer(&osrEntryCallee));
// 1. Place required values in scratch buffer.
loadValuesIntoBuffer(context, osrEntryData.values(), buffer);
// 2. Restore callee saves.
auto dontRestoreRegisters = RegisterSet::stackRegisters();
for (const RegisterAtOffset& entry : *callee.calleeSaveRegisters()) {
if (dontRestoreRegisters.contains(entry.reg(), IgnoreVectors))
continue;
if (entry.reg().isGPR())
context.gpr(entry.reg().gpr()) = *std::bit_cast<UCPURegister*>(std::bit_cast<uint8_t*>(context.fp()) + entry.offset());
else
context.fpr(entry.reg().fpr()) = *std::bit_cast<double*>(std::bit_cast<uint8_t*>(context.fp()) + entry.offset());
}
// 3. Function epilogue, like a tail-call.
UCPURegister* framePointer = std::bit_cast<UCPURegister*>(context.fp());
#if CPU(X86_64)
// move(framePointerRegister, stackPointerRegister);
// pop(framePointerRegister);
context.fp() = std::bit_cast<UCPURegister*>(*framePointer);
context.sp() = framePointer + 1;
static_assert(prologueStackPointerDelta() == sizeof(void*) * 1);
#elif CPU(ARM64E) || CPU(ARM64)
// move(framePointerRegister, stackPointerRegister);
// popPair(framePointerRegister, linkRegister);
context.fp() = std::bit_cast<UCPURegister*>(*framePointer);
context.gpr(ARM64Registers::lr) = std::bit_cast<UCPURegister>(*(framePointer + 1));
context.sp() = framePointer + 2;
static_assert(prologueStackPointerDelta() == sizeof(void*) * 2);
#if CPU(ARM64E)
// LR needs to be untagged since OSR entry function prologue will tag it with SP. This is similar to tail-call.
context.gpr(ARM64Registers::lr) = std::bit_cast<UCPURegister>(untagCodePtrWithStackPointerForJITCall(context.gpr<void*>(ARM64Registers::lr), context.sp()));
#endif
#elif CPU(RISCV64)
// move(framePointerRegister, stackPointerRegister);
// popPair(framePointerRegister, linkRegister);
context.fp() = std::bit_cast<UCPURegister*>(*framePointer);
context.gpr(RISCV64Registers::ra) = std::bit_cast<UCPURegister>(*(framePointer + 1));
context.sp() = framePointer + 2;
static_assert(prologueStackPointerDelta() == sizeof(void*) * 2);
#else
#error Unsupported architecture.
#endif
// 4. Configure argument registers to jump to OSR entry from the caller of this runtime function.
context.gpr(GPRInfo::argumentGPR0) = std::bit_cast<UCPURegister>(buffer); // Modify this only when we definitely tier up.
context.gpr(GPRInfo::nonPreservedNonArgumentGPR0) = std::bit_cast<UCPURegister>(osrEntryCallee.entrypoint().taggedPtr<>());
}
inline bool shouldOMGJIT(JSWebAssemblyInstance* instance, unsigned functionIndex)
{
auto& info = instance->module().moduleInformation();
if (info.functions[functionIndex].data.size() > Options::maximumOMGCandidateCost())
return false;
if (!Options::wasmFunctionIndexRangeToCompile().isInRange(functionIndex))
return false;
return true;
}
JSC_DEFINE_NOEXCEPT_JIT_OPERATION(operationWasmTriggerTierUpNow, void, (CallFrame* callFrame, JSWebAssemblyInstance* instance))
{
BBQCallee& callee = uncheckedDowncast<BBQCallee>(uncheckedDowncast<Wasm::Callee>(*callFrame->callee().asNativeCallee()));
ASSERT(callee.compilationMode() == CompilationMode::BBQMode);
Wasm::CalleeGroup& calleeGroup = *instance->calleeGroup();
ASSERT(instance->memory0Mode() == calleeGroup.mode());
FunctionSpaceIndex functionIndexInSpace = callee.index();
FunctionCodeIndex functionIndex = calleeGroup.toCodeIndex(functionIndexInSpace);
TierUpCount& tierUp = callee.tierUpCounter();
if (!shouldOMGJIT(instance, functionIndex)) {
tierUp.deferIndefinitely();
return;
}
if (shouldTriggerOMGCompile(tierUp, nullptr, functionIndex))
triggerOMGReplacementCompile(tierUp, instance, calleeGroup, functionIndex);
}
#endif
#if ENABLE(WEBASSEMBLY_OMGJIT)
JSC_DEFINE_NOEXCEPT_JIT_OPERATION(operationWasmTriggerOSREntryNow, void, (Probe::Context& context))
{
OSREntryData& osrEntryData = *context.arg<OSREntryData*>();
auto functionIndex = osrEntryData.functionIndex();
uint32_t loopIndex = osrEntryData.loopIndex();
JSWebAssemblyInstance* instance = context.gpr<JSWebAssemblyInstance*>(GPRInfo::wasmContextInstancePointer);
BBQCallee& callee = uncheckedDowncast<BBQCallee>(uncheckedDowncast<Wasm::Callee>(*context.gpr<CallFrame*>(MacroAssembler::framePointerRegister)->callee().asNativeCallee()));
ASSERT(callee.compilationMode() == Wasm::CompilationMode::BBQMode);
ASSERT(callee.refCount());
Wasm::CalleeGroup& calleeGroup = *instance->calleeGroup();
auto returnWithoutOSREntry = [&] {
context.gpr(GPRInfo::nonPreservedNonArgumentGPR0) = 0;
};
auto doStackCheck = [instance](OMGOSREntryCallee* callee) -> bool {
uintptr_t stackPointer = reinterpret_cast<uintptr_t>(currentStackPointer());
ASSERT(callee->stackCheckSize());
if (callee->stackCheckSize() == stackCheckNotNeeded)
return true;
uintptr_t stackExtent = stackPointer - callee->stackCheckSize();
uintptr_t stackLimit = reinterpret_cast<uintptr_t>(instance->softStackLimit());
if (stackExtent >= stackPointer || stackExtent <= stackLimit) [[unlikely]] {
dataLogLnIf(Options::verboseOSR(), "\tSkipping OMG loop tier up due to stack check; ", RawHex(stackPointer), " -> ", RawHex(stackExtent), " is past soft limit ", RawHex(stackLimit));
return false;
}
return true;
};
MemoryMode memoryMode = instance->memory0Mode();
ASSERT(memoryMode == calleeGroup.mode());
TierUpCount& tierUp = callee.tierUpCounter();
if (!shouldOMGJIT(instance, functionIndex)) {
tierUp.deferIndefinitely();
return returnWithoutOSREntry();
}
RefPtr<OMGCallee> replacement = calleeGroup.tryGetOMGCalleeConcurrently(functionIndex);
dataLogLnIf(Options::verboseOSR(), callee, ": Consider OSREntryPlan for functionCodeIndex=", osrEntryData.functionIndex(), " loopIndex#", loopIndex, " with executeCounter = ", tierUp, " ", RawPointer(replacement.get()));
if (!Options::useWasmOSR()) {
if (shouldTriggerOMGCompile(tierUp, replacement.get(), functionIndex))
triggerOMGReplacementCompile(tierUp, instance, calleeGroup, functionIndex);
// We already have an OMG replacement.
if (replacement) {
// No OSR entry points. Just defer indefinitely.
if (tierUp.osrEntryTriggers().isEmpty()) {
tierUp.dontOptimizeAnytimeSoon(functionIndex);
return;
}
// FIXME: Is this ever taken?
// Found one OSR entry point. Since we do not have a way to jettison Wasm::Callee right now, this means that tierUp function is now meaningless.
// Not call it as much as possible.
if (callee.osrEntryCallee()) {
tierUp.dontOptimizeAnytimeSoon(functionIndex);
return;
}
}
return returnWithoutOSREntry();
}
TierUpCount::CompilationStatus compilationStatus = TierUpCount::CompilationStatus::NotCompiled;
{
Locker locker { tierUp.getLock() };
compilationStatus = tierUp.compilationStatusForOMGForOSREntry(memoryMode);
}
bool triggeredSlowPathToStartCompilation = false;
switch (tierUp.osrEntryTriggers()[loopIndex]) {
case TierUpCount::TriggerReason::DontTrigger:
// The trigger isn't set, we entered because the counter reached its
// threshold.
break;
case TierUpCount::TriggerReason::CompilationDone:
// The trigger was set because compilation completed. Don't unset it
// so that further BBQ executions OSR enter as well.
break;
case TierUpCount::TriggerReason::StartCompilation: {
// We were asked to enter as soon as possible and start compiling an
// entry for the current loopIndex. Unset this trigger so we
// don't continually enter.
Locker locker { tierUp.getLock() };
TierUpCount::TriggerReason reason = tierUp.osrEntryTriggers()[loopIndex];
if (reason == TierUpCount::TriggerReason::StartCompilation) {
tierUp.osrEntryTriggers()[loopIndex] = TierUpCount::TriggerReason::DontTrigger;
triggeredSlowPathToStartCompilation = true;
}
break;
}
}
if (compilationStatus == TierUpCount::CompilationStatus::StartCompilation) {
dataLogLnIf(Options::verboseOSR(), "\tdelayOMGCompile still compiling for ", functionIndex);
tierUp.setOptimizationThresholdBasedOnCompilationResult(functionIndex, CompilationResult::CompilationDeferred);
return returnWithoutOSREntry();
}
if (OMGOSREntryCallee* osrEntryCallee = callee.osrEntryCallee()) {
if (osrEntryCallee->loopIndex() == loopIndex) {
if (!doStackCheck(osrEntryCallee))
return returnWithoutOSREntry();
return doOSREntry(instance, context, callee, *osrEntryCallee, osrEntryData);
}
}