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 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 50 | void PropertyHandlerCompiler::PushVectorAndSlot(Register vector, |
| 51 | Register slot) { |
| 52 | MacroAssembler* masm = this->masm(); |
| 53 | __ push(vector); |
| 54 | __ push(slot); |
| 55 | } |
| 56 | |
| 57 | |
| 58 | void PropertyHandlerCompiler::PopVectorAndSlot(Register vector, Register slot) { |
| 59 | MacroAssembler* masm = this->masm(); |
| 60 | __ pop(slot); |
| 61 | __ pop(vector); |
| 62 | } |
| 63 | |
| 64 | |
| 65 | void PropertyHandlerCompiler::DiscardVectorAndSlot() { |
| 66 | MacroAssembler* masm = this->masm(); |
| 67 | // Remove vector and slot. |
| 68 | __ add(esp, Immediate(2 * kPointerSize)); |
| 69 | } |
| 70 | |
| 71 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 72 | void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup( |
| 73 | MacroAssembler* masm, Label* miss_label, Register receiver, |
| 74 | Handle<Name> name, Register scratch0, Register scratch1) { |
| 75 | DCHECK(name->IsUniqueName()); |
| 76 | DCHECK(!receiver.is(scratch0)); |
| 77 | Counters* counters = masm->isolate()->counters(); |
| 78 | __ IncrementCounter(counters->negative_lookups(), 1); |
| 79 | __ IncrementCounter(counters->negative_lookups_miss(), 1); |
| 80 | |
| 81 | __ mov(scratch0, FieldOperand(receiver, HeapObject::kMapOffset)); |
| 82 | |
| 83 | const int kInterceptorOrAccessCheckNeededMask = |
| 84 | (1 << Map::kHasNamedInterceptor) | (1 << Map::kIsAccessCheckNeeded); |
| 85 | |
| 86 | // Bail out if the receiver has a named interceptor or requires access checks. |
| 87 | __ test_b(FieldOperand(scratch0, Map::kBitFieldOffset), |
| 88 | kInterceptorOrAccessCheckNeededMask); |
| 89 | __ j(not_zero, miss_label); |
| 90 | |
| 91 | // Check that receiver is a JSObject. |
| 92 | __ CmpInstanceType(scratch0, FIRST_SPEC_OBJECT_TYPE); |
| 93 | __ j(below, miss_label); |
| 94 | |
| 95 | // Load properties array. |
| 96 | Register properties = scratch0; |
| 97 | __ mov(properties, FieldOperand(receiver, JSObject::kPropertiesOffset)); |
| 98 | |
| 99 | // Check that the properties array is a dictionary. |
| 100 | __ cmp(FieldOperand(properties, HeapObject::kMapOffset), |
| 101 | Immediate(masm->isolate()->factory()->hash_table_map())); |
| 102 | __ j(not_equal, miss_label); |
| 103 | |
| 104 | Label done; |
| 105 | NameDictionaryLookupStub::GenerateNegativeLookup(masm, miss_label, &done, |
| 106 | properties, name, scratch1); |
| 107 | __ bind(&done); |
| 108 | __ DecrementCounter(counters->negative_lookups_miss(), 1); |
| 109 | } |
| 110 | |
| 111 | |
| 112 | void NamedLoadHandlerCompiler::GenerateDirectLoadGlobalFunctionPrototype( |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 113 | MacroAssembler* masm, int index, Register result, Label* miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 114 | const int offset = Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 115 | __ mov(result, Operand(esi, offset)); |
| 116 | __ mov(result, FieldOperand(result, GlobalObject::kNativeContextOffset)); |
| 117 | __ mov(result, Operand(result, Context::SlotOffset(index))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 118 | // Load its initial map. The global functions all have initial maps. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 119 | __ mov(result, |
| 120 | FieldOperand(result, JSFunction::kPrototypeOrInitialMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 121 | // Load the prototype from the initial map. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 122 | __ mov(result, FieldOperand(result, Map::kPrototypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 123 | } |
| 124 | |
| 125 | |
| 126 | void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype( |
| 127 | MacroAssembler* masm, Register receiver, Register scratch1, |
| 128 | Register scratch2, Label* miss_label) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 129 | DCHECK(!FLAG_vector_ics); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 130 | __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); |
| 131 | __ mov(eax, scratch1); |
| 132 | __ ret(0); |
| 133 | } |
| 134 | |
| 135 | |
| 136 | // Generate call to api function. |
| 137 | // This function uses push() to generate smaller, faster code than |
| 138 | // the version above. It is an optimization that should will be removed |
| 139 | // when api call ICs are generated in hydrogen. |
| 140 | void PropertyHandlerCompiler::GenerateFastApiCall( |
| 141 | MacroAssembler* masm, const CallOptimization& optimization, |
| 142 | Handle<Map> receiver_map, Register receiver, Register scratch_in, |
| 143 | bool is_store, int argc, Register* values) { |
| 144 | // Copy return value. |
| 145 | __ pop(scratch_in); |
| 146 | // receiver |
| 147 | __ push(receiver); |
| 148 | // Write the arguments to stack frame. |
| 149 | for (int i = 0; i < argc; i++) { |
| 150 | Register arg = values[argc - 1 - i]; |
| 151 | DCHECK(!receiver.is(arg)); |
| 152 | DCHECK(!scratch_in.is(arg)); |
| 153 | __ push(arg); |
| 154 | } |
| 155 | __ push(scratch_in); |
| 156 | // Stack now matches JSFunction abi. |
| 157 | DCHECK(optimization.is_simple_api_call()); |
| 158 | |
| 159 | // Abi for CallApiFunctionStub. |
| 160 | Register callee = eax; |
| 161 | Register call_data = ebx; |
| 162 | Register holder = ecx; |
| 163 | Register api_function_address = edx; |
| 164 | Register scratch = edi; // scratch_in is no longer valid. |
| 165 | |
| 166 | // Put holder in place. |
| 167 | CallOptimization::HolderLookup holder_lookup; |
| 168 | Handle<JSObject> api_holder = |
| 169 | optimization.LookupHolderOfExpectedType(receiver_map, &holder_lookup); |
| 170 | switch (holder_lookup) { |
| 171 | case CallOptimization::kHolderIsReceiver: |
| 172 | __ Move(holder, receiver); |
| 173 | break; |
| 174 | case CallOptimization::kHolderFound: |
| 175 | __ LoadHeapObject(holder, api_holder); |
| 176 | break; |
| 177 | case CallOptimization::kHolderNotFound: |
| 178 | UNREACHABLE(); |
| 179 | break; |
| 180 | } |
| 181 | |
| 182 | Isolate* isolate = masm->isolate(); |
| 183 | Handle<JSFunction> function = optimization.constant_function(); |
| 184 | Handle<CallHandlerInfo> api_call_info = optimization.api_call_info(); |
| 185 | Handle<Object> call_data_obj(api_call_info->data(), isolate); |
| 186 | |
| 187 | // Put callee in place. |
| 188 | __ LoadHeapObject(callee, function); |
| 189 | |
| 190 | bool call_data_undefined = false; |
| 191 | // Put call_data in place. |
| 192 | if (isolate->heap()->InNewSpace(*call_data_obj)) { |
| 193 | __ mov(scratch, api_call_info); |
| 194 | __ mov(call_data, FieldOperand(scratch, CallHandlerInfo::kDataOffset)); |
| 195 | } else if (call_data_obj->IsUndefined()) { |
| 196 | call_data_undefined = true; |
| 197 | __ mov(call_data, Immediate(isolate->factory()->undefined_value())); |
| 198 | } else { |
| 199 | __ mov(call_data, call_data_obj); |
| 200 | } |
| 201 | |
| 202 | // Put api_function_address in place. |
| 203 | Address function_address = v8::ToCData<Address>(api_call_info->callback()); |
| 204 | __ mov(api_function_address, Immediate(function_address)); |
| 205 | |
| 206 | // Jump to stub. |
| 207 | CallApiFunctionStub stub(isolate, is_store, call_data_undefined, argc); |
| 208 | __ TailCallStub(&stub); |
| 209 | } |
| 210 | |
| 211 | |
| 212 | // Generate code to check that a global property cell is empty. Create |
| 213 | // the property cell at compilation time if no cell exists for the |
| 214 | // property. |
| 215 | void PropertyHandlerCompiler::GenerateCheckPropertyCell( |
| 216 | MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name, |
| 217 | Register scratch, Label* miss) { |
| 218 | Handle<PropertyCell> cell = JSGlobalObject::EnsurePropertyCell(global, name); |
| 219 | DCHECK(cell->value()->IsTheHole()); |
| 220 | Handle<Oddball> the_hole = masm->isolate()->factory()->the_hole_value(); |
| 221 | if (masm->serializer_enabled()) { |
| 222 | __ mov(scratch, Immediate(cell)); |
| 223 | __ cmp(FieldOperand(scratch, PropertyCell::kValueOffset), |
| 224 | Immediate(the_hole)); |
| 225 | } else { |
| 226 | __ cmp(Operand::ForCell(cell), Immediate(the_hole)); |
| 227 | } |
| 228 | __ j(not_equal, miss); |
| 229 | } |
| 230 | |
| 231 | |
| 232 | void NamedStoreHandlerCompiler::GenerateStoreViaSetter( |
| 233 | MacroAssembler* masm, Handle<HeapType> type, Register receiver, |
| 234 | Handle<JSFunction> setter) { |
| 235 | // ----------- S t a t e ------------- |
| 236 | // -- esp[0] : return address |
| 237 | // ----------------------------------- |
| 238 | { |
| 239 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 240 | |
| 241 | // Save value register, so we can restore it later. |
| 242 | __ push(value()); |
| 243 | |
| 244 | if (!setter.is_null()) { |
| 245 | // Call the JavaScript setter with receiver and value on the stack. |
| 246 | if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) { |
| 247 | // Swap in the global receiver. |
| 248 | __ mov(receiver, |
| 249 | FieldOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
| 250 | } |
| 251 | __ push(receiver); |
| 252 | __ push(value()); |
| 253 | ParameterCount actual(1); |
| 254 | ParameterCount expected(setter); |
| 255 | __ InvokeFunction(setter, expected, actual, CALL_FUNCTION, |
| 256 | NullCallWrapper()); |
| 257 | } else { |
| 258 | // If we generate a global code snippet for deoptimization only, remember |
| 259 | // the place to continue after deoptimization. |
| 260 | masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset()); |
| 261 | } |
| 262 | |
| 263 | // We have to return the passed value, not the return value of the setter. |
| 264 | __ pop(eax); |
| 265 | |
| 266 | // Restore context register. |
| 267 | __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset)); |
| 268 | } |
| 269 | __ ret(0); |
| 270 | } |
| 271 | |
| 272 | |
| 273 | static void PushInterceptorArguments(MacroAssembler* masm, Register receiver, |
| 274 | Register holder, Register name, |
| 275 | Handle<JSObject> holder_obj) { |
| 276 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex == 0); |
| 277 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsInfoIndex == 1); |
| 278 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex == 2); |
| 279 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex == 3); |
| 280 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsLength == 4); |
| 281 | __ push(name); |
| 282 | Handle<InterceptorInfo> interceptor(holder_obj->GetNamedInterceptor()); |
| 283 | DCHECK(!masm->isolate()->heap()->InNewSpace(*interceptor)); |
| 284 | Register scratch = name; |
| 285 | __ mov(scratch, Immediate(interceptor)); |
| 286 | __ push(scratch); |
| 287 | __ push(receiver); |
| 288 | __ push(holder); |
| 289 | } |
| 290 | |
| 291 | |
| 292 | static void CompileCallLoadPropertyWithInterceptor( |
| 293 | MacroAssembler* masm, Register receiver, Register holder, Register name, |
| 294 | Handle<JSObject> holder_obj, IC::UtilityId id) { |
| 295 | PushInterceptorArguments(masm, receiver, holder, name, holder_obj); |
| 296 | __ CallExternalReference(ExternalReference(IC_Utility(id), masm->isolate()), |
| 297 | NamedLoadHandlerCompiler::kInterceptorArgsLength); |
| 298 | } |
| 299 | |
| 300 | |
| 301 | static void StoreIC_PushArgs(MacroAssembler* masm) { |
| 302 | Register receiver = StoreDescriptor::ReceiverRegister(); |
| 303 | Register name = StoreDescriptor::NameRegister(); |
| 304 | Register value = StoreDescriptor::ValueRegister(); |
| 305 | |
| 306 | DCHECK(!ebx.is(receiver) && !ebx.is(name) && !ebx.is(value)); |
| 307 | |
| 308 | __ pop(ebx); |
| 309 | __ push(receiver); |
| 310 | __ push(name); |
| 311 | __ push(value); |
| 312 | __ push(ebx); |
| 313 | } |
| 314 | |
| 315 | |
| 316 | void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) { |
| 317 | // Return address is on the stack. |
| 318 | StoreIC_PushArgs(masm); |
| 319 | |
| 320 | // Do tail-call to runtime routine. |
| 321 | ExternalReference ref(IC_Utility(IC::kStoreIC_Slow), masm->isolate()); |
| 322 | __ TailCallExternalReference(ref, 3, 1); |
| 323 | } |
| 324 | |
| 325 | |
| 326 | void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) { |
| 327 | // Return address is on the stack. |
| 328 | StoreIC_PushArgs(masm); |
| 329 | |
| 330 | // Do tail-call to runtime routine. |
| 331 | ExternalReference ref(IC_Utility(IC::kKeyedStoreIC_Slow), masm->isolate()); |
| 332 | __ TailCallExternalReference(ref, 3, 1); |
| 333 | } |
| 334 | |
| 335 | |
| 336 | #undef __ |
| 337 | #define __ ACCESS_MASM(masm()) |
| 338 | |
| 339 | |
| 340 | void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label, |
| 341 | Handle<Name> name) { |
| 342 | if (!label->is_unused()) { |
| 343 | __ bind(label); |
| 344 | __ mov(this->name(), Immediate(name)); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 349 | void NamedStoreHandlerCompiler::GenerateRestoreName(Handle<Name> name) { |
| 350 | __ mov(this->name(), Immediate(name)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 354 | void NamedStoreHandlerCompiler::GenerateRestoreMap(Handle<Map> transition, |
| 355 | Register scratch, |
| 356 | Label* miss) { |
| 357 | Handle<WeakCell> cell = Map::WeakCellForMap(transition); |
| 358 | Register map_reg = StoreTransitionDescriptor::MapRegister(); |
| 359 | DCHECK(!map_reg.is(scratch)); |
| 360 | __ LoadWeakValue(map_reg, cell, miss); |
| 361 | if (transition->CanBeDeprecated()) { |
| 362 | __ mov(scratch, FieldOperand(map_reg, Map::kBitField3Offset)); |
| 363 | __ and_(scratch, Immediate(Map::Deprecated::kMask)); |
| 364 | __ j(not_zero, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 365 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 366 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 367 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 368 | |
| 369 | void NamedStoreHandlerCompiler::GenerateConstantCheck(Register map_reg, |
| 370 | int descriptor, |
| 371 | Register value_reg, |
| 372 | Register scratch, |
| 373 | Label* miss_label) { |
| 374 | DCHECK(!map_reg.is(scratch)); |
| 375 | DCHECK(!map_reg.is(value_reg)); |
| 376 | DCHECK(!value_reg.is(scratch)); |
| 377 | __ LoadInstanceDescriptors(map_reg, scratch); |
| 378 | __ mov(scratch, |
| 379 | FieldOperand(scratch, DescriptorArray::GetValueOffset(descriptor))); |
| 380 | __ cmp(value_reg, scratch); |
| 381 | __ j(not_equal, miss_label); |
| 382 | } |
| 383 | |
| 384 | |
| 385 | void NamedStoreHandlerCompiler::GenerateFieldTypeChecks(HeapType* field_type, |
| 386 | Register value_reg, |
| 387 | Label* miss_label) { |
| 388 | __ JumpIfSmi(value_reg, miss_label); |
| 389 | HeapType::Iterator<Map> it = field_type->Classes(); |
| 390 | if (!it.Done()) { |
| 391 | Label do_store; |
| 392 | while (true) { |
| 393 | __ CompareMap(value_reg, it.Current()); |
| 394 | it.Advance(); |
| 395 | if (it.Done()) { |
| 396 | __ j(not_equal, miss_label); |
| 397 | break; |
| 398 | } |
| 399 | __ j(equal, &do_store, Label::kNear); |
| 400 | } |
| 401 | __ bind(&do_store); |
| 402 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | |
| 406 | Register PropertyHandlerCompiler::CheckPrototypes( |
| 407 | Register object_reg, Register holder_reg, Register scratch1, |
| 408 | Register scratch2, Handle<Name> name, Label* miss, |
| 409 | PrototypeCheckType check) { |
| 410 | Handle<Map> receiver_map(IC::TypeToMap(*type(), isolate())); |
| 411 | |
| 412 | // Make sure there's no overlap between holder and object registers. |
| 413 | DCHECK(!scratch1.is(object_reg) && !scratch1.is(holder_reg)); |
| 414 | DCHECK(!scratch2.is(object_reg) && !scratch2.is(holder_reg) && |
| 415 | !scratch2.is(scratch1)); |
| 416 | |
| 417 | // Keep track of the current object in register reg. |
| 418 | Register reg = object_reg; |
| 419 | int depth = 0; |
| 420 | |
| 421 | Handle<JSObject> current = Handle<JSObject>::null(); |
| 422 | if (type()->IsConstant()) |
| 423 | current = Handle<JSObject>::cast(type()->AsConstant()->Value()); |
| 424 | Handle<JSObject> prototype = Handle<JSObject>::null(); |
| 425 | Handle<Map> current_map = receiver_map; |
| 426 | Handle<Map> holder_map(holder()->map()); |
| 427 | // Traverse the prototype chain and check the maps in the prototype chain for |
| 428 | // fast and global objects or do negative lookup for normal objects. |
| 429 | while (!current_map.is_identical_to(holder_map)) { |
| 430 | ++depth; |
| 431 | |
| 432 | // Only global objects and objects that do not require access |
| 433 | // checks are allowed in stubs. |
| 434 | DCHECK(current_map->IsJSGlobalProxyMap() || |
| 435 | !current_map->is_access_check_needed()); |
| 436 | |
| 437 | prototype = handle(JSObject::cast(current_map->prototype())); |
| 438 | if (current_map->is_dictionary_map() && |
| 439 | !current_map->IsJSGlobalObjectMap()) { |
| 440 | DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. |
| 441 | if (!name->IsUniqueName()) { |
| 442 | DCHECK(name->IsString()); |
| 443 | name = factory()->InternalizeString(Handle<String>::cast(name)); |
| 444 | } |
| 445 | DCHECK(current.is_null() || |
| 446 | current->property_dictionary()->FindEntry(name) == |
| 447 | NameDictionary::kNotFound); |
| 448 | |
| 449 | GenerateDictionaryNegativeLookup(masm(), miss, reg, name, scratch1, |
| 450 | scratch2); |
| 451 | |
| 452 | __ mov(scratch1, FieldOperand(reg, HeapObject::kMapOffset)); |
| 453 | reg = holder_reg; // From now on the object will be in holder_reg. |
| 454 | __ mov(reg, FieldOperand(scratch1, Map::kPrototypeOffset)); |
| 455 | } else { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 456 | Register map_reg = scratch1; |
| 457 | __ mov(map_reg, FieldOperand(reg, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 458 | if (depth != 1 || check == CHECK_ALL_MAPS) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 459 | Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| 460 | __ CmpWeakValue(map_reg, cell, scratch2); |
| 461 | __ j(not_equal, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | // Check access rights to the global object. This has to happen after |
| 465 | // the map check so that we know that the object is actually a global |
| 466 | // object. |
| 467 | // This allows us to install generated handlers for accesses to the |
| 468 | // global proxy (as opposed to using slow ICs). See corresponding code |
| 469 | // in LookupForRead(). |
| 470 | if (current_map->IsJSGlobalProxyMap()) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 471 | __ CheckAccessGlobalProxy(reg, map_reg, scratch2, miss); |
| 472 | // Restore map_reg. |
| 473 | __ mov(map_reg, FieldOperand(reg, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 474 | } else if (current_map->IsJSGlobalObjectMap()) { |
| 475 | GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current), |
| 476 | name, scratch2, miss); |
| 477 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 478 | reg = holder_reg; // From now on the object will be in holder_reg. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 479 | __ mov(reg, FieldOperand(map_reg, Map::kPrototypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | // Go to the next object in the prototype chain. |
| 483 | current = prototype; |
| 484 | current_map = handle(current->map()); |
| 485 | } |
| 486 | |
| 487 | // Log the check depth. |
| 488 | LOG(isolate(), IntEvent("check-maps-depth", depth + 1)); |
| 489 | |
| 490 | if (depth != 0 || check == CHECK_ALL_MAPS) { |
| 491 | // Check the holder map. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 492 | __ mov(scratch1, FieldOperand(reg, HeapObject::kMapOffset)); |
| 493 | Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| 494 | __ CmpWeakValue(scratch1, cell, scratch2); |
| 495 | __ j(not_equal, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | // Perform security check for access to the global object. |
| 499 | DCHECK(current_map->IsJSGlobalProxyMap() || |
| 500 | !current_map->is_access_check_needed()); |
| 501 | if (current_map->IsJSGlobalProxyMap()) { |
| 502 | __ CheckAccessGlobalProxy(reg, scratch1, scratch2, miss); |
| 503 | } |
| 504 | |
| 505 | // Return the register containing the holder. |
| 506 | return reg; |
| 507 | } |
| 508 | |
| 509 | |
| 510 | void NamedLoadHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 511 | if (!miss->is_unused()) { |
| 512 | Label success; |
| 513 | __ jmp(&success); |
| 514 | __ bind(miss); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 515 | if (IC::ICUseVector(kind())) { |
| 516 | DCHECK(kind() == Code::LOAD_IC); |
| 517 | PopVectorAndSlot(); |
| 518 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 519 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 520 | __ bind(&success); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | |
| 525 | void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 526 | if (!miss->is_unused()) { |
| 527 | Label success; |
| 528 | __ jmp(&success); |
| 529 | GenerateRestoreName(miss, name); |
| 530 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 531 | __ bind(&success); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | |
| 536 | void NamedLoadHandlerCompiler::GenerateLoadCallback( |
| 537 | Register reg, Handle<ExecutableAccessorInfo> callback) { |
| 538 | // Insert additional parameters into the stack frame above return address. |
| 539 | DCHECK(!scratch3().is(reg)); |
| 540 | __ pop(scratch3()); // Get return address to place it below. |
| 541 | |
| 542 | STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 0); |
| 543 | STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 1); |
| 544 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 2); |
| 545 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 3); |
| 546 | STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 4); |
| 547 | STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 5); |
| 548 | __ push(receiver()); // receiver |
| 549 | // Push data from ExecutableAccessorInfo. |
| 550 | if (isolate()->heap()->InNewSpace(callback->data())) { |
| 551 | DCHECK(!scratch2().is(reg)); |
| 552 | __ mov(scratch2(), Immediate(callback)); |
| 553 | __ push(FieldOperand(scratch2(), ExecutableAccessorInfo::kDataOffset)); |
| 554 | } else { |
| 555 | __ push(Immediate(Handle<Object>(callback->data(), isolate()))); |
| 556 | } |
| 557 | __ push(Immediate(isolate()->factory()->undefined_value())); // ReturnValue |
| 558 | // ReturnValue default value |
| 559 | __ push(Immediate(isolate()->factory()->undefined_value())); |
| 560 | __ push(Immediate(reinterpret_cast<int>(isolate()))); |
| 561 | __ push(reg); // holder |
| 562 | |
| 563 | // Save a pointer to where we pushed the arguments. This will be |
| 564 | // passed as the const PropertyAccessorInfo& to the C++ callback. |
| 565 | __ push(esp); |
| 566 | |
| 567 | __ push(name()); // name |
| 568 | |
| 569 | __ push(scratch3()); // Restore return address. |
| 570 | |
| 571 | // Abi for CallApiGetter |
| 572 | Register getter_address = ApiGetterDescriptor::function_address(); |
| 573 | Address function_address = v8::ToCData<Address>(callback->getter()); |
| 574 | __ mov(getter_address, Immediate(function_address)); |
| 575 | |
| 576 | CallApiGetterStub stub(isolate()); |
| 577 | __ TailCallStub(&stub); |
| 578 | } |
| 579 | |
| 580 | |
| 581 | void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) { |
| 582 | // Return the constant value. |
| 583 | __ LoadObject(eax, value); |
| 584 | __ ret(0); |
| 585 | } |
| 586 | |
| 587 | |
| 588 | void NamedLoadHandlerCompiler::GenerateLoadInterceptorWithFollowup( |
| 589 | LookupIterator* it, Register holder_reg) { |
| 590 | DCHECK(holder()->HasNamedInterceptor()); |
| 591 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 592 | |
| 593 | // Compile the interceptor call, followed by inline code to load the |
| 594 | // property from further up the prototype chain if the call fails. |
| 595 | // Check that the maps haven't changed. |
| 596 | DCHECK(holder_reg.is(receiver()) || holder_reg.is(scratch1())); |
| 597 | |
| 598 | // Preserve the receiver register explicitly whenever it is different from the |
| 599 | // holder and it is needed should the interceptor return without any result. |
| 600 | // The ACCESSOR case needs the receiver to be passed into C++ code, the FIELD |
| 601 | // case might cause a miss during the prototype check. |
| 602 | bool must_perform_prototype_check = |
| 603 | !holder().is_identical_to(it->GetHolder<JSObject>()); |
| 604 | bool must_preserve_receiver_reg = |
| 605 | !receiver().is(holder_reg) && |
| 606 | (it->state() == LookupIterator::ACCESSOR || must_perform_prototype_check); |
| 607 | |
| 608 | // Save necessary data before invoking an interceptor. |
| 609 | // Requires a frame to make GC aware of pushed pointers. |
| 610 | { |
| 611 | FrameScope frame_scope(masm(), StackFrame::INTERNAL); |
| 612 | |
| 613 | if (must_preserve_receiver_reg) { |
| 614 | __ push(receiver()); |
| 615 | } |
| 616 | __ push(holder_reg); |
| 617 | __ push(this->name()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 618 | InterceptorVectorSlotPush(holder_reg); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 619 | // Invoke an interceptor. Note: map checks from receiver to |
| 620 | // interceptor's holder has been compiled before (see a caller |
| 621 | // of this method.) |
| 622 | CompileCallLoadPropertyWithInterceptor( |
| 623 | masm(), receiver(), holder_reg, this->name(), holder(), |
| 624 | IC::kLoadPropertyWithInterceptorOnly); |
| 625 | |
| 626 | // Check if interceptor provided a value for property. If it's |
| 627 | // the case, return immediately. |
| 628 | Label interceptor_failed; |
| 629 | __ cmp(eax, factory()->no_interceptor_result_sentinel()); |
| 630 | __ j(equal, &interceptor_failed); |
| 631 | frame_scope.GenerateLeaveFrame(); |
| 632 | __ ret(0); |
| 633 | |
| 634 | // Clobber registers when generating debug-code to provoke errors. |
| 635 | __ bind(&interceptor_failed); |
| 636 | if (FLAG_debug_code) { |
| 637 | __ mov(receiver(), Immediate(bit_cast<int32_t>(kZapValue))); |
| 638 | __ mov(holder_reg, Immediate(bit_cast<int32_t>(kZapValue))); |
| 639 | __ mov(this->name(), Immediate(bit_cast<int32_t>(kZapValue))); |
| 640 | } |
| 641 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 642 | InterceptorVectorSlotPop(holder_reg); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 643 | __ pop(this->name()); |
| 644 | __ pop(holder_reg); |
| 645 | if (must_preserve_receiver_reg) { |
| 646 | __ pop(receiver()); |
| 647 | } |
| 648 | |
| 649 | // Leave the internal frame. |
| 650 | } |
| 651 | |
| 652 | GenerateLoadPostInterceptor(it, holder_reg); |
| 653 | } |
| 654 | |
| 655 | |
| 656 | void NamedLoadHandlerCompiler::GenerateLoadInterceptor(Register holder_reg) { |
| 657 | DCHECK(holder()->HasNamedInterceptor()); |
| 658 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 659 | // Call the runtime system to load the interceptor. |
| 660 | __ pop(scratch2()); // save old return address |
| 661 | PushInterceptorArguments(masm(), receiver(), holder_reg, this->name(), |
| 662 | holder()); |
| 663 | __ push(scratch2()); // restore old return address |
| 664 | |
| 665 | ExternalReference ref = ExternalReference( |
| 666 | IC_Utility(IC::kLoadPropertyWithInterceptor), isolate()); |
| 667 | __ TailCallExternalReference( |
| 668 | ref, NamedLoadHandlerCompiler::kInterceptorArgsLength, 1); |
| 669 | } |
| 670 | |
| 671 | |
| 672 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback( |
| 673 | Handle<JSObject> object, Handle<Name> name, |
| 674 | Handle<ExecutableAccessorInfo> callback) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 675 | Register holder_reg = Frontend(name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 676 | |
| 677 | __ pop(scratch1()); // remove the return address |
| 678 | __ push(receiver()); |
| 679 | __ push(holder_reg); |
| 680 | __ Push(callback); |
| 681 | __ Push(name); |
| 682 | __ push(value()); |
| 683 | __ push(scratch1()); // restore return address |
| 684 | |
| 685 | // Do tail-call to the runtime system. |
| 686 | ExternalReference store_callback_property = |
| 687 | ExternalReference(IC_Utility(IC::kStoreCallbackProperty), isolate()); |
| 688 | __ TailCallExternalReference(store_callback_property, 5, 1); |
| 689 | |
| 690 | // Return the generated code. |
| 691 | return GetCode(kind(), Code::FAST, name); |
| 692 | } |
| 693 | |
| 694 | |
| 695 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreInterceptor( |
| 696 | Handle<Name> name) { |
| 697 | __ pop(scratch1()); // remove the return address |
| 698 | __ push(receiver()); |
| 699 | __ push(this->name()); |
| 700 | __ push(value()); |
| 701 | __ push(scratch1()); // restore return address |
| 702 | |
| 703 | // Do tail-call to the runtime system. |
| 704 | ExternalReference store_ic_property = ExternalReference( |
| 705 | IC_Utility(IC::kStorePropertyWithInterceptor), isolate()); |
| 706 | __ TailCallExternalReference(store_ic_property, 3, 1); |
| 707 | |
| 708 | // Return the generated code. |
| 709 | return GetCode(kind(), Code::FAST, name); |
| 710 | } |
| 711 | |
| 712 | |
| 713 | Register NamedStoreHandlerCompiler::value() { |
| 714 | return StoreDescriptor::ValueRegister(); |
| 715 | } |
| 716 | |
| 717 | |
| 718 | Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal( |
| 719 | Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) { |
| 720 | Label miss; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 721 | if (IC::ICUseVector(kind())) { |
| 722 | PushVectorAndSlot(); |
| 723 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 724 | FrontendHeader(receiver(), name, &miss); |
| 725 | // Get the value from the cell. |
| 726 | Register result = StoreDescriptor::ValueRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 727 | Handle<WeakCell> weak_cell = factory()->NewWeakCell(cell); |
| 728 | __ LoadWeakValue(result, weak_cell, &miss); |
| 729 | __ mov(result, FieldOperand(result, PropertyCell::kValueOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 730 | |
| 731 | // Check for deleted property if property can actually be deleted. |
| 732 | if (is_configurable) { |
| 733 | __ cmp(result, factory()->the_hole_value()); |
| 734 | __ j(equal, &miss); |
| 735 | } else if (FLAG_debug_code) { |
| 736 | __ cmp(result, factory()->the_hole_value()); |
| 737 | __ Check(not_equal, kDontDeleteCellsCannotContainTheHole); |
| 738 | } |
| 739 | |
| 740 | Counters* counters = isolate()->counters(); |
| 741 | __ IncrementCounter(counters->named_load_global_stub(), 1); |
| 742 | // The code above already loads the result into the return register. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 743 | if (IC::ICUseVector(kind())) { |
| 744 | DiscardVectorAndSlot(); |
| 745 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 746 | __ ret(0); |
| 747 | |
| 748 | FrontendFooter(name, &miss); |
| 749 | |
| 750 | // Return the generated code. |
| 751 | return GetCode(kind(), Code::NORMAL, name); |
| 752 | } |
| 753 | |
| 754 | |
| 755 | #undef __ |
| 756 | } |
| 757 | } // namespace v8::internal |
| 758 | |
| 759 | #endif // V8_TARGET_ARCH_IA32 |