Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 1 | // Copyright 2014 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "src/v8.h" |
| 6 | |
| 7 | #if V8_TARGET_ARCH_IA32 |
| 8 | |
| 9 | #include "src/ic/call-optimization.h" |
| 10 | #include "src/ic/handler-compiler.h" |
| 11 | #include "src/ic/ic.h" |
| 12 | |
| 13 | namespace v8 { |
| 14 | namespace internal { |
| 15 | |
| 16 | #define __ ACCESS_MASM(masm) |
| 17 | |
| 18 | |
| 19 | void NamedLoadHandlerCompiler::GenerateLoadViaGetter( |
| 20 | MacroAssembler* masm, Handle<HeapType> type, Register receiver, |
| 21 | Handle<JSFunction> getter) { |
| 22 | { |
| 23 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 24 | |
| 25 | if (!getter.is_null()) { |
| 26 | // Call the JavaScript getter with the receiver on the stack. |
| 27 | if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) { |
| 28 | // Swap in the global receiver. |
| 29 | __ mov(receiver, |
| 30 | FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
| 31 | } |
| 32 | __ push(receiver); |
| 33 | ParameterCount actual(0); |
| 34 | ParameterCount expected(getter); |
| 35 | __ InvokeFunction(getter, expected, actual, CALL_FUNCTION, |
| 36 | NullCallWrapper()); |
| 37 | } else { |
| 38 | // If we generate a global code snippet for deoptimization only, remember |
| 39 | // the place to continue after deoptimization. |
| 40 | masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset()); |
| 41 | } |
| 42 | |
| 43 | // Restore context register. |
| 44 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 45 | } |
| 46 | __ ret(0); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup( |
| 51 | MacroAssembler* masm, Label* miss_label, Register receiver, |
| 52 | Handle<Name> name, Register scratch0, Register scratch1) { |
| 53 | DCHECK(name->IsUniqueName()); |
| 54 | DCHECK(!receiver.is(scratch0)); |
| 55 | Counters* counters = masm->isolate()->counters(); |
| 56 | __ IncrementCounter(counters->negative_lookups(), 1); |
| 57 | __ IncrementCounter(counters->negative_lookups_miss(), 1); |
| 58 | |
| 59 | __ mov(scratch0, FieldOperand(receiver, HeapObject::kMapOffset)); |
| 60 | |
| 61 | const int kInterceptorOrAccessCheckNeededMask = |
| 62 | (1 << Map::kHasNamedInterceptor) | (1 << Map::kIsAccessCheckNeeded); |
| 63 | |
| 64 | // Bail out if the receiver has a named interceptor or requires access checks. |
| 65 | __ test_b(FieldOperand(scratch0, Map::kBitFieldOffset), |
| 66 | kInterceptorOrAccessCheckNeededMask); |
| 67 | __ j(not_zero, miss_label); |
| 68 | |
| 69 | // Check that receiver is a JSObject. |
| 70 | __ CmpInstanceType(scratch0, FIRST_SPEC_OBJECT_TYPE); |
| 71 | __ j(below, miss_label); |
| 72 | |
| 73 | // Load properties array. |
| 74 | Register properties = scratch0; |
| 75 | __ mov(properties, FieldOperand(receiver, JSObject::kPropertiesOffset)); |
| 76 | |
| 77 | // Check that the properties array is a dictionary. |
| 78 | __ cmp(FieldOperand(properties, HeapObject::kMapOffset), |
| 79 | Immediate(masm->isolate()->factory()->hash_table_map())); |
| 80 | __ j(not_equal, miss_label); |
| 81 | |
| 82 | Label done; |
| 83 | NameDictionaryLookupStub::GenerateNegativeLookup(masm, miss_label, &done, |
| 84 | properties, name, scratch1); |
| 85 | __ bind(&done); |
| 86 | __ DecrementCounter(counters->negative_lookups_miss(), 1); |
| 87 | } |
| 88 | |
| 89 | |
| 90 | void NamedLoadHandlerCompiler::GenerateDirectLoadGlobalFunctionPrototype( |
| 91 | MacroAssembler* masm, int index, Register prototype, Label* miss) { |
| 92 | // Get the global function with the given index. |
| 93 | Handle<JSFunction> function( |
| 94 | JSFunction::cast(masm->isolate()->native_context()->get(index))); |
| 95 | // Check we're still in the same context. |
| 96 | Register scratch = prototype; |
| 97 | const int offset = Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX); |
| 98 | __ mov(scratch, Operand(esi, offset)); |
| 99 | __ mov(scratch, FieldOperand(scratch, GlobalObject::kNativeContextOffset)); |
| 100 | __ cmp(Operand(scratch, Context::SlotOffset(index)), function); |
| 101 | __ j(not_equal, miss); |
| 102 | |
| 103 | // Load its initial map. The global functions all have initial maps. |
| 104 | __ Move(prototype, Immediate(Handle<Map>(function->initial_map()))); |
| 105 | // Load the prototype from the initial map. |
| 106 | __ mov(prototype, FieldOperand(prototype, Map::kPrototypeOffset)); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype( |
| 111 | MacroAssembler* masm, Register receiver, Register scratch1, |
| 112 | Register scratch2, Label* miss_label) { |
| 113 | __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); |
| 114 | __ mov(eax, scratch1); |
| 115 | __ ret(0); |
| 116 | } |
| 117 | |
| 118 | |
| 119 | // Generate call to api function. |
| 120 | // This function uses push() to generate smaller, faster code than |
| 121 | // the version above. It is an optimization that should will be removed |
| 122 | // when api call ICs are generated in hydrogen. |
| 123 | void PropertyHandlerCompiler::GenerateFastApiCall( |
| 124 | MacroAssembler* masm, const CallOptimization& optimization, |
| 125 | Handle<Map> receiver_map, Register receiver, Register scratch_in, |
| 126 | bool is_store, int argc, Register* values) { |
| 127 | // Copy return value. |
| 128 | __ pop(scratch_in); |
| 129 | // receiver |
| 130 | __ push(receiver); |
| 131 | // Write the arguments to stack frame. |
| 132 | for (int i = 0; i < argc; i++) { |
| 133 | Register arg = values[argc - 1 - i]; |
| 134 | DCHECK(!receiver.is(arg)); |
| 135 | DCHECK(!scratch_in.is(arg)); |
| 136 | __ push(arg); |
| 137 | } |
| 138 | __ push(scratch_in); |
| 139 | // Stack now matches JSFunction abi. |
| 140 | DCHECK(optimization.is_simple_api_call()); |
| 141 | |
| 142 | // Abi for CallApiFunctionStub. |
| 143 | Register callee = eax; |
| 144 | Register call_data = ebx; |
| 145 | Register holder = ecx; |
| 146 | Register api_function_address = edx; |
| 147 | Register scratch = edi; // scratch_in is no longer valid. |
| 148 | |
| 149 | // Put holder in place. |
| 150 | CallOptimization::HolderLookup holder_lookup; |
| 151 | Handle<JSObject> api_holder = |
| 152 | optimization.LookupHolderOfExpectedType(receiver_map, &holder_lookup); |
| 153 | switch (holder_lookup) { |
| 154 | case CallOptimization::kHolderIsReceiver: |
| 155 | __ Move(holder, receiver); |
| 156 | break; |
| 157 | case CallOptimization::kHolderFound: |
| 158 | __ LoadHeapObject(holder, api_holder); |
| 159 | break; |
| 160 | case CallOptimization::kHolderNotFound: |
| 161 | UNREACHABLE(); |
| 162 | break; |
| 163 | } |
| 164 | |
| 165 | Isolate* isolate = masm->isolate(); |
| 166 | Handle<JSFunction> function = optimization.constant_function(); |
| 167 | Handle<CallHandlerInfo> api_call_info = optimization.api_call_info(); |
| 168 | Handle<Object> call_data_obj(api_call_info->data(), isolate); |
| 169 | |
| 170 | // Put callee in place. |
| 171 | __ LoadHeapObject(callee, function); |
| 172 | |
| 173 | bool call_data_undefined = false; |
| 174 | // Put call_data in place. |
| 175 | if (isolate->heap()->InNewSpace(*call_data_obj)) { |
| 176 | __ mov(scratch, api_call_info); |
| 177 | __ mov(call_data, FieldOperand(scratch, CallHandlerInfo::kDataOffset)); |
| 178 | } else if (call_data_obj->IsUndefined()) { |
| 179 | call_data_undefined = true; |
| 180 | __ mov(call_data, Immediate(isolate->factory()->undefined_value())); |
| 181 | } else { |
| 182 | __ mov(call_data, call_data_obj); |
| 183 | } |
| 184 | |
| 185 | // Put api_function_address in place. |
| 186 | Address function_address = v8::ToCData<Address>(api_call_info->callback()); |
| 187 | __ mov(api_function_address, Immediate(function_address)); |
| 188 | |
| 189 | // Jump to stub. |
| 190 | CallApiFunctionStub stub(isolate, is_store, call_data_undefined, argc); |
| 191 | __ TailCallStub(&stub); |
| 192 | } |
| 193 | |
| 194 | |
| 195 | // Generate code to check that a global property cell is empty. Create |
| 196 | // the property cell at compilation time if no cell exists for the |
| 197 | // property. |
| 198 | void PropertyHandlerCompiler::GenerateCheckPropertyCell( |
| 199 | MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name, |
| 200 | Register scratch, Label* miss) { |
| 201 | Handle<PropertyCell> cell = JSGlobalObject::EnsurePropertyCell(global, name); |
| 202 | DCHECK(cell->value()->IsTheHole()); |
| 203 | Handle<Oddball> the_hole = masm->isolate()->factory()->the_hole_value(); |
| 204 | if (masm->serializer_enabled()) { |
| 205 | __ mov(scratch, Immediate(cell)); |
| 206 | __ cmp(FieldOperand(scratch, PropertyCell::kValueOffset), |
| 207 | Immediate(the_hole)); |
| 208 | } else { |
| 209 | __ cmp(Operand::ForCell(cell), Immediate(the_hole)); |
| 210 | } |
| 211 | __ j(not_equal, miss); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | void NamedStoreHandlerCompiler::GenerateStoreViaSetter( |
| 216 | MacroAssembler* masm, Handle<HeapType> type, Register receiver, |
| 217 | Handle<JSFunction> setter) { |
| 218 | // ----------- S t a t e ------------- |
| 219 | // -- esp[0] : return address |
| 220 | // ----------------------------------- |
| 221 | { |
| 222 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 223 | |
| 224 | // Save value register, so we can restore it later. |
| 225 | __ push(value()); |
| 226 | |
| 227 | if (!setter.is_null()) { |
| 228 | // Call the JavaScript setter with receiver and value on the stack. |
| 229 | if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) { |
| 230 | // Swap in the global receiver. |
| 231 | __ mov(receiver, |
| 232 | FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
| 233 | } |
| 234 | __ push(receiver); |
| 235 | __ push(value()); |
| 236 | ParameterCount actual(1); |
| 237 | ParameterCount expected(setter); |
| 238 | __ InvokeFunction(setter, expected, actual, CALL_FUNCTION, |
| 239 | NullCallWrapper()); |
| 240 | } else { |
| 241 | // If we generate a global code snippet for deoptimization only, remember |
| 242 | // the place to continue after deoptimization. |
| 243 | masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset()); |
| 244 | } |
| 245 | |
| 246 | // We have to return the passed value, not the return value of the setter. |
| 247 | __ pop(eax); |
| 248 | |
| 249 | // Restore context register. |
| 250 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 251 | } |
| 252 | __ ret(0); |
| 253 | } |
| 254 | |
| 255 | |
| 256 | static void PushInterceptorArguments(MacroAssembler* masm, Register receiver, |
| 257 | Register holder, Register name, |
| 258 | Handle<JSObject> holder_obj) { |
| 259 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex == 0); |
| 260 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsInfoIndex == 1); |
| 261 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex == 2); |
| 262 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex == 3); |
| 263 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsLength == 4); |
| 264 | __ push(name); |
| 265 | Handle<InterceptorInfo> interceptor(holder_obj->GetNamedInterceptor()); |
| 266 | DCHECK(!masm->isolate()->heap()->InNewSpace(*interceptor)); |
| 267 | Register scratch = name; |
| 268 | __ mov(scratch, Immediate(interceptor)); |
| 269 | __ push(scratch); |
| 270 | __ push(receiver); |
| 271 | __ push(holder); |
| 272 | } |
| 273 | |
| 274 | |
| 275 | static void CompileCallLoadPropertyWithInterceptor( |
| 276 | MacroAssembler* masm, Register receiver, Register holder, Register name, |
| 277 | Handle<JSObject> holder_obj, IC::UtilityId id) { |
| 278 | PushInterceptorArguments(masm, receiver, holder, name, holder_obj); |
| 279 | __ CallExternalReference(ExternalReference(IC_Utility(id), masm->isolate()), |
| 280 | NamedLoadHandlerCompiler::kInterceptorArgsLength); |
| 281 | } |
| 282 | |
| 283 | |
| 284 | static void StoreIC_PushArgs(MacroAssembler* masm) { |
| 285 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 286 | Register name = StoreDescriptor::NameRegister(); |
| 287 | Register value = StoreDescriptor::ValueRegister(); |
| 288 | |
| 289 | DCHECK(!ebx.is(receiver) && !ebx.is(name) && !ebx.is(value)); |
| 290 | |
| 291 | __ pop(ebx); |
| 292 | __ push(receiver); |
| 293 | __ push(name); |
| 294 | __ push(value); |
| 295 | __ push(ebx); |
| 296 | } |
| 297 | |
| 298 | |
| 299 | void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) { |
| 300 | // Return address is on the stack. |
| 301 | StoreIC_PushArgs(masm); |
| 302 | |
| 303 | // Do tail-call to runtime routine. |
| 304 | ExternalReference ref(IC_Utility(IC::kStoreIC_Slow), masm->isolate()); |
| 305 | __ TailCallExternalReference(ref, 3, 1); |
| 306 | } |
| 307 | |
| 308 | |
| 309 | void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) { |
| 310 | // Return address is on the stack. |
| 311 | StoreIC_PushArgs(masm); |
| 312 | |
| 313 | // Do tail-call to runtime routine. |
| 314 | ExternalReference ref(IC_Utility(IC::kKeyedStoreIC_Slow), masm->isolate()); |
| 315 | __ TailCallExternalReference(ref, 3, 1); |
| 316 | } |
| 317 | |
| 318 | |
| 319 | #undef __ |
| 320 | #define __ ACCESS_MASM(masm()) |
| 321 | |
| 322 | |
| 323 | void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label, |
| 324 | Handle<Name> name) { |
| 325 | if (!label->is_unused()) { |
| 326 | __ bind(label); |
| 327 | __ mov(this->name(), Immediate(name)); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | |
| 332 | // Receiver_reg is preserved on jumps to miss_label, but may be destroyed if |
| 333 | // store is successful. |
| 334 | void NamedStoreHandlerCompiler::GenerateStoreTransition( |
| 335 | Handle<Map> transition, Handle<Name> name, Register receiver_reg, |
| 336 | Register storage_reg, Register value_reg, Register scratch1, |
| 337 | Register scratch2, Register unused, Label* miss_label, Label* slow) { |
| 338 | int descriptor = transition->LastAdded(); |
| 339 | DescriptorArray* descriptors = transition->instance_descriptors(); |
| 340 | PropertyDetails details = descriptors->GetDetails(descriptor); |
| 341 | Representation representation = details.representation(); |
| 342 | DCHECK(!representation.IsNone()); |
| 343 | |
| 344 | if (details.type() == CONSTANT) { |
| 345 | Handle<Object> constant(descriptors->GetValue(descriptor), isolate()); |
| 346 | __ CmpObject(value_reg, constant); |
| 347 | __ j(not_equal, miss_label); |
| 348 | } else if (representation.IsSmi()) { |
| 349 | __ JumpIfNotSmi(value_reg, miss_label); |
| 350 | } else if (representation.IsHeapObject()) { |
| 351 | __ JumpIfSmi(value_reg, miss_label); |
| 352 | HeapType* field_type = descriptors->GetFieldType(descriptor); |
| 353 | HeapType::Iterator<Map> it = field_type->Classes(); |
| 354 | if (!it.Done()) { |
| 355 | Label do_store; |
| 356 | while (true) { |
| 357 | __ CompareMap(value_reg, it.Current()); |
| 358 | it.Advance(); |
| 359 | if (it.Done()) { |
| 360 | __ j(not_equal, miss_label); |
| 361 | break; |
| 362 | } |
| 363 | __ j(equal, &do_store, Label::kNear); |
| 364 | } |
| 365 | __ bind(&do_store); |
| 366 | } |
| 367 | } else if (representation.IsDouble()) { |
| 368 | Label do_store, heap_number; |
| 369 | __ AllocateHeapNumber(storage_reg, scratch1, scratch2, slow, MUTABLE); |
| 370 | |
| 371 | __ JumpIfNotSmi(value_reg, &heap_number); |
| 372 | __ SmiUntag(value_reg); |
| 373 | __ Cvtsi2sd(xmm0, value_reg); |
| 374 | __ SmiTag(value_reg); |
| 375 | __ jmp(&do_store); |
| 376 | |
| 377 | __ bind(&heap_number); |
| 378 | __ CheckMap(value_reg, isolate()->factory()->heap_number_map(), miss_label, |
| 379 | DONT_DO_SMI_CHECK); |
| 380 | __ movsd(xmm0, FieldOperand(value_reg, HeapNumber::kValueOffset)); |
| 381 | |
| 382 | __ bind(&do_store); |
| 383 | __ movsd(FieldOperand(storage_reg, HeapNumber::kValueOffset), xmm0); |
| 384 | } |
| 385 | |
| 386 | // Stub never generated for objects that require access checks. |
| 387 | DCHECK(!transition->is_access_check_needed()); |
| 388 | |
| 389 | // Perform map transition for the receiver if necessary. |
| 390 | if (details.type() == FIELD && |
| 391 | Map::cast(transition->GetBackPointer())->unused_property_fields() == 0) { |
| 392 | // The properties must be extended before we can store the value. |
| 393 | // We jump to a runtime call that extends the properties array. |
| 394 | __ pop(scratch1); // Return address. |
| 395 | __ push(receiver_reg); |
| 396 | __ push(Immediate(transition)); |
| 397 | __ push(value_reg); |
| 398 | __ push(scratch1); |
| 399 | __ TailCallExternalReference( |
| 400 | ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage), |
| 401 | isolate()), |
| 402 | 3, 1); |
| 403 | return; |
| 404 | } |
| 405 | |
| 406 | // Update the map of the object. |
| 407 | __ mov(scratch1, Immediate(transition)); |
| 408 | __ mov(FieldOperand(receiver_reg, HeapObject::kMapOffset), scratch1); |
| 409 | |
| 410 | // Update the write barrier for the map field. |
| 411 | __ RecordWriteField(receiver_reg, HeapObject::kMapOffset, scratch1, scratch2, |
| 412 | kDontSaveFPRegs, OMIT_REMEMBERED_SET, OMIT_SMI_CHECK); |
| 413 | |
| 414 | if (details.type() == CONSTANT) { |
| 415 | DCHECK(value_reg.is(eax)); |
| 416 | __ ret(0); |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | int index = transition->instance_descriptors()->GetFieldIndex( |
| 421 | transition->LastAdded()); |
| 422 | |
| 423 | // Adjust for the number of properties stored in the object. Even in the |
| 424 | // face of a transition we can use the old map here because the size of the |
| 425 | // object and the number of in-object properties is not going to change. |
| 426 | index -= transition->inobject_properties(); |
| 427 | |
| 428 | SmiCheck smi_check = |
| 429 | representation.IsTagged() ? INLINE_SMI_CHECK : OMIT_SMI_CHECK; |
| 430 | // TODO(verwaest): Share this code as a code stub. |
| 431 | if (index < 0) { |
| 432 | // Set the property straight into the object. |
| 433 | int offset = transition->instance_size() + (index * kPointerSize); |
| 434 | if (representation.IsDouble()) { |
| 435 | __ mov(FieldOperand(receiver_reg, offset), storage_reg); |
| 436 | } else { |
| 437 | __ mov(FieldOperand(receiver_reg, offset), value_reg); |
| 438 | } |
| 439 | |
| 440 | if (!representation.IsSmi()) { |
| 441 | // Update the write barrier for the array address. |
| 442 | if (!representation.IsDouble()) { |
| 443 | __ mov(storage_reg, value_reg); |
| 444 | } |
| 445 | __ RecordWriteField(receiver_reg, offset, storage_reg, scratch1, |
| 446 | kDontSaveFPRegs, EMIT_REMEMBERED_SET, smi_check); |
| 447 | } |
| 448 | } else { |
| 449 | // Write to the properties array. |
| 450 | int offset = index * kPointerSize + FixedArray::kHeaderSize; |
| 451 | // Get the properties array (optimistically). |
| 452 | __ mov(scratch1, FieldOperand(receiver_reg, JSObject::kPropertiesOffset)); |
| 453 | if (representation.IsDouble()) { |
| 454 | __ mov(FieldOperand(scratch1, offset), storage_reg); |
| 455 | } else { |
| 456 | __ mov(FieldOperand(scratch1, offset), value_reg); |
| 457 | } |
| 458 | |
| 459 | if (!representation.IsSmi()) { |
| 460 | // Update the write barrier for the array address. |
| 461 | if (!representation.IsDouble()) { |
| 462 | __ mov(storage_reg, value_reg); |
| 463 | } |
| 464 | __ RecordWriteField(scratch1, offset, storage_reg, receiver_reg, |
| 465 | kDontSaveFPRegs, EMIT_REMEMBERED_SET, smi_check); |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | // Return the value (register eax). |
| 470 | DCHECK(value_reg.is(eax)); |
| 471 | __ ret(0); |
| 472 | } |
| 473 | |
| 474 | |
| 475 | void NamedStoreHandlerCompiler::GenerateStoreField(LookupIterator* lookup, |
| 476 | Register value_reg, |
| 477 | Label* miss_label) { |
| 478 | DCHECK(lookup->representation().IsHeapObject()); |
| 479 | __ JumpIfSmi(value_reg, miss_label); |
| 480 | HeapType::Iterator<Map> it = lookup->GetFieldType()->Classes(); |
| 481 | Label do_store; |
| 482 | while (true) { |
| 483 | __ CompareMap(value_reg, it.Current()); |
| 484 | it.Advance(); |
| 485 | if (it.Done()) { |
| 486 | __ j(not_equal, miss_label); |
| 487 | break; |
| 488 | } |
| 489 | __ j(equal, &do_store, Label::kNear); |
| 490 | } |
| 491 | __ bind(&do_store); |
| 492 | |
| 493 | StoreFieldStub stub(isolate(), lookup->GetFieldIndex(), |
| 494 | lookup->representation()); |
| 495 | GenerateTailCall(masm(), stub.GetCode()); |
| 496 | } |
| 497 | |
| 498 | |
| 499 | Register PropertyHandlerCompiler::CheckPrototypes( |
| 500 | Register object_reg, Register holder_reg, Register scratch1, |
| 501 | Register scratch2, Handle<Name> name, Label* miss, |
| 502 | PrototypeCheckType check) { |
| 503 | Handle<Map> receiver_map(IC::TypeToMap(*type(), isolate())); |
| 504 | |
| 505 | // Make sure there's no overlap between holder and object registers. |
| 506 | DCHECK(!scratch1.is(object_reg) && !scratch1.is(holder_reg)); |
| 507 | DCHECK(!scratch2.is(object_reg) && !scratch2.is(holder_reg) && |
| 508 | !scratch2.is(scratch1)); |
| 509 | |
| 510 | // Keep track of the current object in register reg. |
| 511 | Register reg = object_reg; |
| 512 | int depth = 0; |
| 513 | |
| 514 | Handle<JSObject> current = Handle<JSObject>::null(); |
| 515 | if (type()->IsConstant()) |
| 516 | current = Handle<JSObject>::cast(type()->AsConstant()->Value()); |
| 517 | Handle<JSObject> prototype = Handle<JSObject>::null(); |
| 518 | Handle<Map> current_map = receiver_map; |
| 519 | Handle<Map> holder_map(holder()->map()); |
| 520 | // Traverse the prototype chain and check the maps in the prototype chain for |
| 521 | // fast and global objects or do negative lookup for normal objects. |
| 522 | while (!current_map.is_identical_to(holder_map)) { |
| 523 | ++depth; |
| 524 | |
| 525 | // Only global objects and objects that do not require access |
| 526 | // checks are allowed in stubs. |
| 527 | DCHECK(current_map->IsJSGlobalProxyMap() || |
| 528 | !current_map->is_access_check_needed()); |
| 529 | |
| 530 | prototype = handle(JSObject::cast(current_map->prototype())); |
| 531 | if (current_map->is_dictionary_map() && |
| 532 | !current_map->IsJSGlobalObjectMap()) { |
| 533 | DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. |
| 534 | if (!name->IsUniqueName()) { |
| 535 | DCHECK(name->IsString()); |
| 536 | name = factory()->InternalizeString(Handle<String>::cast(name)); |
| 537 | } |
| 538 | DCHECK(current.is_null() || |
| 539 | current->property_dictionary()->FindEntry(name) == |
| 540 | NameDictionary::kNotFound); |
| 541 | |
| 542 | GenerateDictionaryNegativeLookup(masm(), miss, reg, name, scratch1, |
| 543 | scratch2); |
| 544 | |
| 545 | __ mov(scratch1, FieldOperand(reg, HeapObject::kMapOffset)); |
| 546 | reg = holder_reg; // From now on the object will be in holder_reg. |
| 547 | __ mov(reg, FieldOperand(scratch1, Map::kPrototypeOffset)); |
| 548 | } else { |
| 549 | bool in_new_space = heap()->InNewSpace(*prototype); |
| 550 | // Two possible reasons for loading the prototype from the map: |
| 551 | // (1) Can't store references to new space in code. |
| 552 | // (2) Handler is shared for all receivers with the same prototype |
| 553 | // map (but not necessarily the same prototype instance). |
| 554 | bool load_prototype_from_map = in_new_space || depth == 1; |
| 555 | if (depth != 1 || check == CHECK_ALL_MAPS) { |
| 556 | __ CheckMap(reg, current_map, miss, DONT_DO_SMI_CHECK); |
| 557 | } |
| 558 | |
| 559 | // Check access rights to the global object. This has to happen after |
| 560 | // the map check so that we know that the object is actually a global |
| 561 | // object. |
| 562 | // This allows us to install generated handlers for accesses to the |
| 563 | // global proxy (as opposed to using slow ICs). See corresponding code |
| 564 | // in LookupForRead(). |
| 565 | if (current_map->IsJSGlobalProxyMap()) { |
| 566 | __ CheckAccessGlobalProxy(reg, scratch1, scratch2, miss); |
| 567 | } else if (current_map->IsJSGlobalObjectMap()) { |
| 568 | GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current), |
| 569 | name, scratch2, miss); |
| 570 | } |
| 571 | |
| 572 | if (load_prototype_from_map) { |
| 573 | // Save the map in scratch1 for later. |
| 574 | __ mov(scratch1, FieldOperand(reg, HeapObject::kMapOffset)); |
| 575 | } |
| 576 | |
| 577 | reg = holder_reg; // From now on the object will be in holder_reg. |
| 578 | |
| 579 | if (load_prototype_from_map) { |
| 580 | __ mov(reg, FieldOperand(scratch1, Map::kPrototypeOffset)); |
| 581 | } else { |
| 582 | __ mov(reg, prototype); |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | // Go to the next object in the prototype chain. |
| 587 | current = prototype; |
| 588 | current_map = handle(current->map()); |
| 589 | } |
| 590 | |
| 591 | // Log the check depth. |
| 592 | LOG(isolate(), IntEvent("check-maps-depth", depth + 1)); |
| 593 | |
| 594 | if (depth != 0 || check == CHECK_ALL_MAPS) { |
| 595 | // Check the holder map. |
| 596 | __ CheckMap(reg, current_map, miss, DONT_DO_SMI_CHECK); |
| 597 | } |
| 598 | |
| 599 | // Perform security check for access to the global object. |
| 600 | DCHECK(current_map->IsJSGlobalProxyMap() || |
| 601 | !current_map->is_access_check_needed()); |
| 602 | if (current_map->IsJSGlobalProxyMap()) { |
| 603 | __ CheckAccessGlobalProxy(reg, scratch1, scratch2, miss); |
| 604 | } |
| 605 | |
| 606 | // Return the register containing the holder. |
| 607 | return reg; |
| 608 | } |
| 609 | |
| 610 | |
| 611 | void NamedLoadHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 612 | if (!miss->is_unused()) { |
| 613 | Label success; |
| 614 | __ jmp(&success); |
| 615 | __ bind(miss); |
| 616 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 617 | __ bind(&success); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | |
| 622 | void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 623 | if (!miss->is_unused()) { |
| 624 | Label success; |
| 625 | __ jmp(&success); |
| 626 | GenerateRestoreName(miss, name); |
| 627 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 628 | __ bind(&success); |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | |
| 633 | void NamedLoadHandlerCompiler::GenerateLoadCallback( |
| 634 | Register reg, Handle<ExecutableAccessorInfo> callback) { |
| 635 | // Insert additional parameters into the stack frame above return address. |
| 636 | DCHECK(!scratch3().is(reg)); |
| 637 | __ pop(scratch3()); // Get return address to place it below. |
| 638 | |
| 639 | STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 0); |
| 640 | STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 1); |
| 641 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 2); |
| 642 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 3); |
| 643 | STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 4); |
| 644 | STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 5); |
| 645 | __ push(receiver()); // receiver |
| 646 | // Push data from ExecutableAccessorInfo. |
| 647 | if (isolate()->heap()->InNewSpace(callback->data())) { |
| 648 | DCHECK(!scratch2().is(reg)); |
| 649 | __ mov(scratch2(), Immediate(callback)); |
| 650 | __ push(FieldOperand(scratch2(), ExecutableAccessorInfo::kDataOffset)); |
| 651 | } else { |
| 652 | __ push(Immediate(Handle<Object>(callback->data(), isolate()))); |
| 653 | } |
| 654 | __ push(Immediate(isolate()->factory()->undefined_value())); // ReturnValue |
| 655 | // ReturnValue default value |
| 656 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 657 | __ push(Immediate(reinterpret_cast<int>(isolate()))); |
| 658 | __ push(reg); // holder |
| 659 | |
| 660 | // Save a pointer to where we pushed the arguments. This will be |
| 661 | // passed as the const PropertyAccessorInfo& to the C++ callback. |
| 662 | __ push(esp); |
| 663 | |
| 664 | __ push(name()); // name |
| 665 | |
| 666 | __ push(scratch3()); // Restore return address. |
| 667 | |
| 668 | // Abi for CallApiGetter |
| 669 | Register getter_address = ApiGetterDescriptor::function_address(); |
| 670 | Address function_address = v8::ToCData<Address>(callback->getter()); |
| 671 | __ mov(getter_address, Immediate(function_address)); |
| 672 | |
| 673 | CallApiGetterStub stub(isolate()); |
| 674 | __ TailCallStub(&stub); |
| 675 | } |
| 676 | |
| 677 | |
| 678 | void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) { |
| 679 | // Return the constant value. |
| 680 | __ LoadObject(eax, value); |
| 681 | __ ret(0); |
| 682 | } |
| 683 | |
| 684 | |
| 685 | void NamedLoadHandlerCompiler::GenerateLoadInterceptorWithFollowup( |
| 686 | LookupIterator* it, Register holder_reg) { |
| 687 | DCHECK(holder()->HasNamedInterceptor()); |
| 688 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 689 | |
| 690 | // Compile the interceptor call, followed by inline code to load the |
| 691 | // property from further up the prototype chain if the call fails. |
| 692 | // Check that the maps haven't changed. |
| 693 | DCHECK(holder_reg.is(receiver()) || holder_reg.is(scratch1())); |
| 694 | |
| 695 | // Preserve the receiver register explicitly whenever it is different from the |
| 696 | // holder and it is needed should the interceptor return without any result. |
| 697 | // The ACCESSOR case needs the receiver to be passed into C++ code, the FIELD |
| 698 | // case might cause a miss during the prototype check. |
| 699 | bool must_perform_prototype_check = |
| 700 | !holder().is_identical_to(it->GetHolder<JSObject>()); |
| 701 | bool must_preserve_receiver_reg = |
| 702 | !receiver().is(holder_reg) && |
| 703 | (it->state() == LookupIterator::ACCESSOR || must_perform_prototype_check); |
| 704 | |
| 705 | // Save necessary data before invoking an interceptor. |
| 706 | // Requires a frame to make GC aware of pushed pointers. |
| 707 | { |
| 708 | FrameScope frame_scope(masm(), StackFrame::INTERNAL); |
| 709 | |
| 710 | if (must_preserve_receiver_reg) { |
| 711 | __ push(receiver()); |
| 712 | } |
| 713 | __ push(holder_reg); |
| 714 | __ push(this->name()); |
| 715 | |
| 716 | // Invoke an interceptor. Note: map checks from receiver to |
| 717 | // interceptor's holder has been compiled before (see a caller |
| 718 | // of this method.) |
| 719 | CompileCallLoadPropertyWithInterceptor( |
| 720 | masm(), receiver(), holder_reg, this->name(), holder(), |
| 721 | IC::kLoadPropertyWithInterceptorOnly); |
| 722 | |
| 723 | // Check if interceptor provided a value for property. If it's |
| 724 | // the case, return immediately. |
| 725 | Label interceptor_failed; |
| 726 | __ cmp(eax, factory()->no_interceptor_result_sentinel()); |
| 727 | __ j(equal, &interceptor_failed); |
| 728 | frame_scope.GenerateLeaveFrame(); |
| 729 | __ ret(0); |
| 730 | |
| 731 | // Clobber registers when generating debug-code to provoke errors. |
| 732 | __ bind(&interceptor_failed); |
| 733 | if (FLAG_debug_code) { |
| 734 | __ mov(receiver(), Immediate(bit_cast<int32_t>(kZapValue))); |
| 735 | __ mov(holder_reg, Immediate(bit_cast<int32_t>(kZapValue))); |
| 736 | __ mov(this->name(), Immediate(bit_cast<int32_t>(kZapValue))); |
| 737 | } |
| 738 | |
| 739 | __ pop(this->name()); |
| 740 | __ pop(holder_reg); |
| 741 | if (must_preserve_receiver_reg) { |
| 742 | __ pop(receiver()); |
| 743 | } |
| 744 | |
| 745 | // Leave the internal frame. |
| 746 | } |
| 747 | |
| 748 | GenerateLoadPostInterceptor(it, holder_reg); |
| 749 | } |
| 750 | |
| 751 | |
| 752 | void NamedLoadHandlerCompiler::GenerateLoadInterceptor(Register holder_reg) { |
| 753 | DCHECK(holder()->HasNamedInterceptor()); |
| 754 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 755 | // Call the runtime system to load the interceptor. |
| 756 | __ pop(scratch2()); // save old return address |
| 757 | PushInterceptorArguments(masm(), receiver(), holder_reg, this->name(), |
| 758 | holder()); |
| 759 | __ push(scratch2()); // restore old return address |
| 760 | |
| 761 | ExternalReference ref = ExternalReference( |
| 762 | IC_Utility(IC::kLoadPropertyWithInterceptor), isolate()); |
| 763 | __ TailCallExternalReference( |
| 764 | ref, NamedLoadHandlerCompiler::kInterceptorArgsLength, 1); |
| 765 | } |
| 766 | |
| 767 | |
| 768 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback( |
| 769 | Handle<JSObject> object, Handle<Name> name, |
| 770 | Handle<ExecutableAccessorInfo> callback) { |
| 771 | Register holder_reg = Frontend(receiver(), name); |
| 772 | |
| 773 | __ pop(scratch1()); // remove the return address |
| 774 | __ push(receiver()); |
| 775 | __ push(holder_reg); |
| 776 | __ Push(callback); |
| 777 | __ Push(name); |
| 778 | __ push(value()); |
| 779 | __ push(scratch1()); // restore return address |
| 780 | |
| 781 | // Do tail-call to the runtime system. |
| 782 | ExternalReference store_callback_property = |
| 783 | ExternalReference(IC_Utility(IC::kStoreCallbackProperty), isolate()); |
| 784 | __ TailCallExternalReference(store_callback_property, 5, 1); |
| 785 | |
| 786 | // Return the generated code. |
| 787 | return GetCode(kind(), Code::FAST, name); |
| 788 | } |
| 789 | |
| 790 | |
| 791 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreInterceptor( |
| 792 | Handle<Name> name) { |
| 793 | __ pop(scratch1()); // remove the return address |
| 794 | __ push(receiver()); |
| 795 | __ push(this->name()); |
| 796 | __ push(value()); |
| 797 | __ push(scratch1()); // restore return address |
| 798 | |
| 799 | // Do tail-call to the runtime system. |
| 800 | ExternalReference store_ic_property = ExternalReference( |
| 801 | IC_Utility(IC::kStorePropertyWithInterceptor), isolate()); |
| 802 | __ TailCallExternalReference(store_ic_property, 3, 1); |
| 803 | |
| 804 | // Return the generated code. |
| 805 | return GetCode(kind(), Code::FAST, name); |
| 806 | } |
| 807 | |
| 808 | |
| 809 | Register NamedStoreHandlerCompiler::value() { |
| 810 | return StoreDescriptor::ValueRegister(); |
| 811 | } |
| 812 | |
| 813 | |
| 814 | Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal( |
| 815 | Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) { |
| 816 | Label miss; |
| 817 | |
| 818 | FrontendHeader(receiver(), name, &miss); |
| 819 | // Get the value from the cell. |
| 820 | Register result = StoreDescriptor::ValueRegister(); |
| 821 | if (masm()->serializer_enabled()) { |
| 822 | __ mov(result, Immediate(cell)); |
| 823 | __ mov(result, FieldOperand(result, PropertyCell::kValueOffset)); |
| 824 | } else { |
| 825 | __ mov(result, Operand::ForCell(cell)); |
| 826 | } |
| 827 | |
| 828 | // Check for deleted property if property can actually be deleted. |
| 829 | if (is_configurable) { |
| 830 | __ cmp(result, factory()->the_hole_value()); |
| 831 | __ j(equal, &miss); |
| 832 | } else if (FLAG_debug_code) { |
| 833 | __ cmp(result, factory()->the_hole_value()); |
| 834 | __ Check(not_equal, kDontDeleteCellsCannotContainTheHole); |
| 835 | } |
| 836 | |
| 837 | Counters* counters = isolate()->counters(); |
| 838 | __ IncrementCounter(counters->named_load_global_stub(), 1); |
| 839 | // The code above already loads the result into the return register. |
| 840 | __ ret(0); |
| 841 | |
| 842 | FrontendFooter(name, &miss); |
| 843 | |
| 844 | // Return the generated code. |
| 845 | return GetCode(kind(), Code::NORMAL, name); |
| 846 | } |
| 847 | |
| 848 | |
| 849 | #undef __ |
| 850 | } |
| 851 | } // namespace v8::internal |
| 852 | |
| 853 | #endif // V8_TARGET_ARCH_IA32 |