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_ARM |
| 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 | // ----------- S t a t e ------------- |
| 23 | // -- r0 : receiver |
| 24 | // -- r2 : name |
| 25 | // -- lr : return address |
| 26 | // ----------------------------------- |
| 27 | { |
| 28 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 29 | |
| 30 | if (!getter.is_null()) { |
| 31 | // Call the JavaScript getter with the receiver on the stack. |
| 32 | if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) { |
| 33 | // Swap in the global receiver. |
| 34 | __ ldr(receiver, |
| 35 | FieldMemOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
| 36 | } |
| 37 | __ push(receiver); |
| 38 | ParameterCount actual(0); |
| 39 | ParameterCount expected(getter); |
| 40 | __ InvokeFunction(getter, expected, actual, CALL_FUNCTION, |
| 41 | NullCallWrapper()); |
| 42 | } else { |
| 43 | // If we generate a global code snippet for deoptimization only, remember |
| 44 | // the place to continue after deoptimization. |
| 45 | masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset()); |
| 46 | } |
| 47 | |
| 48 | // Restore context register. |
| 49 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 50 | } |
| 51 | __ Ret(); |
| 52 | } |
| 53 | |
| 54 | |
| 55 | void NamedStoreHandlerCompiler::GenerateStoreViaSetter( |
| 56 | MacroAssembler* masm, Handle<HeapType> type, Register receiver, |
| 57 | Handle<JSFunction> setter) { |
| 58 | // ----------- S t a t e ------------- |
| 59 | // -- lr : return address |
| 60 | // ----------------------------------- |
| 61 | { |
| 62 | FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL); |
| 63 | |
| 64 | // Save value register, so we can restore it later. |
| 65 | __ push(value()); |
| 66 | |
| 67 | if (!setter.is_null()) { |
| 68 | // Call the JavaScript setter with receiver and value on the stack. |
| 69 | if (IC::TypeToMap(*type, masm->isolate())->IsJSGlobalObjectMap()) { |
| 70 | // Swap in the global receiver. |
| 71 | __ ldr(receiver, |
| 72 | FieldMemOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
| 73 | } |
| 74 | __ Push(receiver, value()); |
| 75 | ParameterCount actual(1); |
| 76 | ParameterCount expected(setter); |
| 77 | __ InvokeFunction(setter, expected, actual, CALL_FUNCTION, |
| 78 | NullCallWrapper()); |
| 79 | } else { |
| 80 | // If we generate a global code snippet for deoptimization only, remember |
| 81 | // the place to continue after deoptimization. |
| 82 | masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset()); |
| 83 | } |
| 84 | |
| 85 | // We have to return the passed value, not the return value of the setter. |
| 86 | __ pop(r0); |
| 87 | |
| 88 | // Restore context register. |
| 89 | __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 90 | } |
| 91 | __ Ret(); |
| 92 | } |
| 93 | |
| 94 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 95 | void PropertyHandlerCompiler::PushVectorAndSlot(Register vector, |
| 96 | Register slot) { |
| 97 | MacroAssembler* masm = this->masm(); |
| 98 | __ push(vector); |
| 99 | __ push(slot); |
| 100 | } |
| 101 | |
| 102 | |
| 103 | void PropertyHandlerCompiler::PopVectorAndSlot(Register vector, Register slot) { |
| 104 | MacroAssembler* masm = this->masm(); |
| 105 | __ pop(slot); |
| 106 | __ pop(vector); |
| 107 | } |
| 108 | |
| 109 | |
| 110 | void PropertyHandlerCompiler::DiscardVectorAndSlot() { |
| 111 | MacroAssembler* masm = this->masm(); |
| 112 | // Remove vector and slot. |
| 113 | __ add(sp, sp, Operand(2 * kPointerSize)); |
| 114 | } |
| 115 | |
| 116 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 117 | void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup( |
| 118 | MacroAssembler* masm, Label* miss_label, Register receiver, |
| 119 | Handle<Name> name, Register scratch0, Register scratch1) { |
| 120 | DCHECK(name->IsUniqueName()); |
| 121 | DCHECK(!receiver.is(scratch0)); |
| 122 | Counters* counters = masm->isolate()->counters(); |
| 123 | __ IncrementCounter(counters->negative_lookups(), 1, scratch0, scratch1); |
| 124 | __ IncrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1); |
| 125 | |
| 126 | Label done; |
| 127 | |
| 128 | const int kInterceptorOrAccessCheckNeededMask = |
| 129 | (1 << Map::kHasNamedInterceptor) | (1 << Map::kIsAccessCheckNeeded); |
| 130 | |
| 131 | // Bail out if the receiver has a named interceptor or requires access checks. |
| 132 | Register map = scratch1; |
| 133 | __ ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 134 | __ ldrb(scratch0, FieldMemOperand(map, Map::kBitFieldOffset)); |
| 135 | __ tst(scratch0, Operand(kInterceptorOrAccessCheckNeededMask)); |
| 136 | __ b(ne, miss_label); |
| 137 | |
| 138 | // Check that receiver is a JSObject. |
| 139 | __ ldrb(scratch0, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 140 | __ cmp(scratch0, Operand(FIRST_SPEC_OBJECT_TYPE)); |
| 141 | __ b(lt, miss_label); |
| 142 | |
| 143 | // Load properties array. |
| 144 | Register properties = scratch0; |
| 145 | __ ldr(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 146 | // Check that the properties array is a dictionary. |
| 147 | __ ldr(map, FieldMemOperand(properties, HeapObject::kMapOffset)); |
| 148 | Register tmp = properties; |
| 149 | __ LoadRoot(tmp, Heap::kHashTableMapRootIndex); |
| 150 | __ cmp(map, tmp); |
| 151 | __ b(ne, miss_label); |
| 152 | |
| 153 | // Restore the temporarily used register. |
| 154 | __ ldr(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 155 | |
| 156 | |
| 157 | NameDictionaryLookupStub::GenerateNegativeLookup( |
| 158 | masm, miss_label, &done, receiver, properties, name, scratch1); |
| 159 | __ bind(&done); |
| 160 | __ DecrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1); |
| 161 | } |
| 162 | |
| 163 | |
| 164 | void NamedLoadHandlerCompiler::GenerateDirectLoadGlobalFunctionPrototype( |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 165 | MacroAssembler* masm, int index, Register result, Label* miss) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 166 | const int offset = Context::SlotOffset(Context::GLOBAL_OBJECT_INDEX); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 167 | __ ldr(result, MemOperand(cp, offset)); |
| 168 | __ ldr(result, FieldMemOperand(result, GlobalObject::kNativeContextOffset)); |
| 169 | __ ldr(result, MemOperand(result, Context::SlotOffset(index))); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 170 | // Load its initial map. The global functions all have initial maps. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 171 | __ ldr(result, |
| 172 | FieldMemOperand(result, JSFunction::kPrototypeOrInitialMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 173 | // Load the prototype from the initial map. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 174 | __ ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | |
| 178 | void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype( |
| 179 | MacroAssembler* masm, Register receiver, Register scratch1, |
| 180 | Register scratch2, Label* miss_label) { |
| 181 | __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); |
| 182 | __ mov(r0, scratch1); |
| 183 | __ Ret(); |
| 184 | } |
| 185 | |
| 186 | |
| 187 | // Generate code to check that a global property cell is empty. Create |
| 188 | // the property cell at compilation time if no cell exists for the |
| 189 | // property. |
| 190 | void PropertyHandlerCompiler::GenerateCheckPropertyCell( |
| 191 | MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name, |
| 192 | Register scratch, Label* miss) { |
| 193 | Handle<Cell> cell = JSGlobalObject::EnsurePropertyCell(global, name); |
| 194 | DCHECK(cell->value()->IsTheHole()); |
| 195 | __ mov(scratch, Operand(cell)); |
| 196 | __ ldr(scratch, FieldMemOperand(scratch, Cell::kValueOffset)); |
| 197 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 198 | __ cmp(scratch, ip); |
| 199 | __ b(ne, miss); |
| 200 | } |
| 201 | |
| 202 | |
| 203 | static void PushInterceptorArguments(MacroAssembler* masm, Register receiver, |
| 204 | Register holder, Register name, |
| 205 | Handle<JSObject> holder_obj) { |
| 206 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex == 0); |
| 207 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsInfoIndex == 1); |
| 208 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex == 2); |
| 209 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex == 3); |
| 210 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsLength == 4); |
| 211 | __ push(name); |
| 212 | Handle<InterceptorInfo> interceptor(holder_obj->GetNamedInterceptor()); |
| 213 | DCHECK(!masm->isolate()->heap()->InNewSpace(*interceptor)); |
| 214 | Register scratch = name; |
| 215 | __ mov(scratch, Operand(interceptor)); |
| 216 | __ push(scratch); |
| 217 | __ push(receiver); |
| 218 | __ push(holder); |
| 219 | } |
| 220 | |
| 221 | |
| 222 | static void CompileCallLoadPropertyWithInterceptor( |
| 223 | MacroAssembler* masm, Register receiver, Register holder, Register name, |
| 224 | Handle<JSObject> holder_obj, IC::UtilityId id) { |
| 225 | PushInterceptorArguments(masm, receiver, holder, name, holder_obj); |
| 226 | __ CallExternalReference(ExternalReference(IC_Utility(id), masm->isolate()), |
| 227 | NamedLoadHandlerCompiler::kInterceptorArgsLength); |
| 228 | } |
| 229 | |
| 230 | |
| 231 | // Generate call to api function. |
| 232 | void PropertyHandlerCompiler::GenerateFastApiCall( |
| 233 | MacroAssembler* masm, const CallOptimization& optimization, |
| 234 | Handle<Map> receiver_map, Register receiver, Register scratch_in, |
| 235 | bool is_store, int argc, Register* values) { |
| 236 | DCHECK(!receiver.is(scratch_in)); |
| 237 | __ push(receiver); |
| 238 | // Write the arguments to stack frame. |
| 239 | for (int i = 0; i < argc; i++) { |
| 240 | Register arg = values[argc - 1 - i]; |
| 241 | DCHECK(!receiver.is(arg)); |
| 242 | DCHECK(!scratch_in.is(arg)); |
| 243 | __ push(arg); |
| 244 | } |
| 245 | DCHECK(optimization.is_simple_api_call()); |
| 246 | |
| 247 | // Abi for CallApiFunctionStub. |
| 248 | Register callee = r0; |
| 249 | Register call_data = r4; |
| 250 | Register holder = r2; |
| 251 | Register api_function_address = r1; |
| 252 | |
| 253 | // Put holder in place. |
| 254 | CallOptimization::HolderLookup holder_lookup; |
| 255 | Handle<JSObject> api_holder = |
| 256 | optimization.LookupHolderOfExpectedType(receiver_map, &holder_lookup); |
| 257 | switch (holder_lookup) { |
| 258 | case CallOptimization::kHolderIsReceiver: |
| 259 | __ Move(holder, receiver); |
| 260 | break; |
| 261 | case CallOptimization::kHolderFound: |
| 262 | __ Move(holder, api_holder); |
| 263 | break; |
| 264 | case CallOptimization::kHolderNotFound: |
| 265 | UNREACHABLE(); |
| 266 | break; |
| 267 | } |
| 268 | |
| 269 | Isolate* isolate = masm->isolate(); |
| 270 | Handle<JSFunction> function = optimization.constant_function(); |
| 271 | Handle<CallHandlerInfo> api_call_info = optimization.api_call_info(); |
| 272 | Handle<Object> call_data_obj(api_call_info->data(), isolate); |
| 273 | |
| 274 | // Put callee in place. |
| 275 | __ Move(callee, function); |
| 276 | |
| 277 | bool call_data_undefined = false; |
| 278 | // Put call_data in place. |
| 279 | if (isolate->heap()->InNewSpace(*call_data_obj)) { |
| 280 | __ Move(call_data, api_call_info); |
| 281 | __ ldr(call_data, FieldMemOperand(call_data, CallHandlerInfo::kDataOffset)); |
| 282 | } else if (call_data_obj->IsUndefined()) { |
| 283 | call_data_undefined = true; |
| 284 | __ LoadRoot(call_data, Heap::kUndefinedValueRootIndex); |
| 285 | } else { |
| 286 | __ Move(call_data, call_data_obj); |
| 287 | } |
| 288 | |
| 289 | // Put api_function_address in place. |
| 290 | Address function_address = v8::ToCData<Address>(api_call_info->callback()); |
| 291 | ApiFunction fun(function_address); |
| 292 | ExternalReference::Type type = ExternalReference::DIRECT_API_CALL; |
| 293 | ExternalReference ref = ExternalReference(&fun, type, masm->isolate()); |
| 294 | __ mov(api_function_address, Operand(ref)); |
| 295 | |
| 296 | // Jump to stub. |
| 297 | CallApiFunctionStub stub(isolate, is_store, call_data_undefined, argc); |
| 298 | __ TailCallStub(&stub); |
| 299 | } |
| 300 | |
| 301 | |
| 302 | void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) { |
| 303 | // Push receiver, key and value for runtime call. |
| 304 | __ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(), |
| 305 | StoreDescriptor::ValueRegister()); |
| 306 | |
| 307 | // The slow case calls into the runtime to complete the store without causing |
| 308 | // an IC miss that would otherwise cause a transition to the generic stub. |
| 309 | ExternalReference ref = |
| 310 | ExternalReference(IC_Utility(IC::kStoreIC_Slow), masm->isolate()); |
| 311 | __ TailCallExternalReference(ref, 3, 1); |
| 312 | } |
| 313 | |
| 314 | |
| 315 | void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) { |
| 316 | // Push receiver, key and value for runtime call. |
| 317 | __ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(), |
| 318 | StoreDescriptor::ValueRegister()); |
| 319 | |
| 320 | // The slow case calls into the runtime to complete the store without causing |
| 321 | // an IC miss that would otherwise cause a transition to the generic stub. |
| 322 | ExternalReference ref = |
| 323 | ExternalReference(IC_Utility(IC::kKeyedStoreIC_Slow), masm->isolate()); |
| 324 | __ TailCallExternalReference(ref, 3, 1); |
| 325 | } |
| 326 | |
| 327 | |
| 328 | #undef __ |
| 329 | #define __ ACCESS_MASM(masm()) |
| 330 | |
| 331 | |
| 332 | void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label, |
| 333 | Handle<Name> name) { |
| 334 | if (!label->is_unused()) { |
| 335 | __ bind(label); |
| 336 | __ mov(this->name(), Operand(name)); |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 341 | void NamedStoreHandlerCompiler::GenerateRestoreName(Handle<Name> name) { |
| 342 | __ mov(this->name(), Operand(name)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 346 | void NamedStoreHandlerCompiler::GenerateRestoreMap(Handle<Map> transition, |
| 347 | Register scratch, |
| 348 | Label* miss) { |
| 349 | Handle<WeakCell> cell = Map::WeakCellForMap(transition); |
| 350 | Register map_reg = StoreTransitionDescriptor::MapRegister(); |
| 351 | DCHECK(!map_reg.is(scratch)); |
| 352 | __ LoadWeakValue(map_reg, cell, miss); |
| 353 | if (transition->CanBeDeprecated()) { |
| 354 | __ ldr(scratch, FieldMemOperand(map_reg, Map::kBitField3Offset)); |
| 355 | __ tst(scratch, Operand(Map::Deprecated::kMask)); |
| 356 | __ b(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 357 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 358 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 359 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 360 | |
| 361 | void NamedStoreHandlerCompiler::GenerateConstantCheck(Register map_reg, |
| 362 | int descriptor, |
| 363 | Register value_reg, |
| 364 | Register scratch, |
| 365 | Label* miss_label) { |
| 366 | DCHECK(!map_reg.is(scratch)); |
| 367 | DCHECK(!map_reg.is(value_reg)); |
| 368 | DCHECK(!value_reg.is(scratch)); |
| 369 | __ LoadInstanceDescriptors(map_reg, scratch); |
| 370 | __ ldr(scratch, |
| 371 | FieldMemOperand(scratch, DescriptorArray::GetValueOffset(descriptor))); |
| 372 | __ cmp(value_reg, scratch); |
| 373 | __ b(ne, miss_label); |
| 374 | } |
| 375 | |
| 376 | |
| 377 | void NamedStoreHandlerCompiler::GenerateFieldTypeChecks(HeapType* field_type, |
| 378 | Register value_reg, |
| 379 | Label* miss_label) { |
| 380 | __ JumpIfSmi(value_reg, miss_label); |
| 381 | HeapType::Iterator<Map> it = field_type->Classes(); |
| 382 | if (!it.Done()) { |
| 383 | __ ldr(scratch1(), FieldMemOperand(value_reg, HeapObject::kMapOffset)); |
| 384 | Label do_store; |
| 385 | while (true) { |
| 386 | __ CompareMap(scratch1(), it.Current(), &do_store); |
| 387 | it.Advance(); |
| 388 | if (it.Done()) { |
| 389 | __ b(ne, miss_label); |
| 390 | break; |
| 391 | } |
| 392 | __ b(eq, &do_store); |
| 393 | } |
| 394 | __ bind(&do_store); |
| 395 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | |
| 399 | Register PropertyHandlerCompiler::CheckPrototypes( |
| 400 | Register object_reg, Register holder_reg, Register scratch1, |
| 401 | Register scratch2, Handle<Name> name, Label* miss, |
| 402 | PrototypeCheckType check) { |
| 403 | Handle<Map> receiver_map(IC::TypeToMap(*type(), isolate())); |
| 404 | |
| 405 | // Make sure there's no overlap between holder and object registers. |
| 406 | DCHECK(!scratch1.is(object_reg) && !scratch1.is(holder_reg)); |
| 407 | DCHECK(!scratch2.is(object_reg) && !scratch2.is(holder_reg) && |
| 408 | !scratch2.is(scratch1)); |
| 409 | |
| 410 | // Keep track of the current object in register reg. |
| 411 | Register reg = object_reg; |
| 412 | int depth = 0; |
| 413 | |
| 414 | Handle<JSObject> current = Handle<JSObject>::null(); |
| 415 | if (type()->IsConstant()) { |
| 416 | current = Handle<JSObject>::cast(type()->AsConstant()->Value()); |
| 417 | } |
| 418 | Handle<JSObject> prototype = Handle<JSObject>::null(); |
| 419 | Handle<Map> current_map = receiver_map; |
| 420 | Handle<Map> holder_map(holder()->map()); |
| 421 | // Traverse the prototype chain and check the maps in the prototype chain for |
| 422 | // fast and global objects or do negative lookup for normal objects. |
| 423 | while (!current_map.is_identical_to(holder_map)) { |
| 424 | ++depth; |
| 425 | |
| 426 | // Only global objects and objects that do not require access |
| 427 | // checks are allowed in stubs. |
| 428 | DCHECK(current_map->IsJSGlobalProxyMap() || |
| 429 | !current_map->is_access_check_needed()); |
| 430 | |
| 431 | prototype = handle(JSObject::cast(current_map->prototype())); |
| 432 | if (current_map->is_dictionary_map() && |
| 433 | !current_map->IsJSGlobalObjectMap()) { |
| 434 | DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. |
| 435 | if (!name->IsUniqueName()) { |
| 436 | DCHECK(name->IsString()); |
| 437 | name = factory()->InternalizeString(Handle<String>::cast(name)); |
| 438 | } |
| 439 | DCHECK(current.is_null() || |
| 440 | current->property_dictionary()->FindEntry(name) == |
| 441 | NameDictionary::kNotFound); |
| 442 | |
| 443 | GenerateDictionaryNegativeLookup(masm(), miss, reg, name, scratch1, |
| 444 | scratch2); |
| 445 | |
| 446 | __ ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| 447 | reg = holder_reg; // From now on the object will be in holder_reg. |
| 448 | __ ldr(reg, FieldMemOperand(scratch1, Map::kPrototypeOffset)); |
| 449 | } else { |
| 450 | Register map_reg = scratch1; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 451 | __ ldr(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 452 | if (depth != 1 || check == CHECK_ALL_MAPS) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 453 | Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| 454 | __ CmpWeakValue(map_reg, cell, scratch2); |
| 455 | __ b(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | // Check access rights to the global object. This has to happen after |
| 459 | // the map check so that we know that the object is actually a global |
| 460 | // object. |
| 461 | // This allows us to install generated handlers for accesses to the |
| 462 | // global proxy (as opposed to using slow ICs). See corresponding code |
| 463 | // in LookupForRead(). |
| 464 | if (current_map->IsJSGlobalProxyMap()) { |
| 465 | __ CheckAccessGlobalProxy(reg, scratch2, miss); |
| 466 | } else if (current_map->IsJSGlobalObjectMap()) { |
| 467 | GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current), |
| 468 | name, scratch2, miss); |
| 469 | } |
| 470 | |
| 471 | reg = holder_reg; // From now on the object will be in holder_reg. |
| 472 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 473 | __ ldr(reg, FieldMemOperand(map_reg, Map::kPrototypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 474 | } |
| 475 | |
| 476 | // Go to the next object in the prototype chain. |
| 477 | current = prototype; |
| 478 | current_map = handle(current->map()); |
| 479 | } |
| 480 | |
| 481 | // Log the check depth. |
| 482 | LOG(isolate(), IntEvent("check-maps-depth", depth + 1)); |
| 483 | |
| 484 | if (depth != 0 || check == CHECK_ALL_MAPS) { |
| 485 | // Check the holder map. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 486 | __ ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| 487 | Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| 488 | __ CmpWeakValue(scratch1, cell, scratch2); |
| 489 | __ b(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | // Perform security check for access to the global object. |
| 493 | DCHECK(current_map->IsJSGlobalProxyMap() || |
| 494 | !current_map->is_access_check_needed()); |
| 495 | if (current_map->IsJSGlobalProxyMap()) { |
| 496 | __ CheckAccessGlobalProxy(reg, scratch1, miss); |
| 497 | } |
| 498 | |
| 499 | // Return the register containing the holder. |
| 500 | return reg; |
| 501 | } |
| 502 | |
| 503 | |
| 504 | void NamedLoadHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 505 | if (!miss->is_unused()) { |
| 506 | Label success; |
| 507 | __ b(&success); |
| 508 | __ bind(miss); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 509 | if (IC::ICUseVector(kind())) { |
| 510 | DCHECK(kind() == Code::LOAD_IC); |
| 511 | PopVectorAndSlot(); |
| 512 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 513 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 514 | __ bind(&success); |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | |
| 519 | void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 520 | if (!miss->is_unused()) { |
| 521 | Label success; |
| 522 | __ b(&success); |
| 523 | GenerateRestoreName(miss, name); |
| 524 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 525 | __ bind(&success); |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | |
| 530 | void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) { |
| 531 | // Return the constant value. |
| 532 | __ Move(r0, value); |
| 533 | __ Ret(); |
| 534 | } |
| 535 | |
| 536 | |
| 537 | void NamedLoadHandlerCompiler::GenerateLoadCallback( |
| 538 | Register reg, Handle<ExecutableAccessorInfo> callback) { |
| 539 | // Build AccessorInfo::args_ list on the stack and push property name below |
| 540 | // the exit frame to make GC aware of them and store pointers to them. |
| 541 | STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 0); |
| 542 | STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 1); |
| 543 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 2); |
| 544 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 3); |
| 545 | STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 4); |
| 546 | STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 5); |
| 547 | STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 6); |
| 548 | DCHECK(!scratch2().is(reg)); |
| 549 | DCHECK(!scratch3().is(reg)); |
| 550 | DCHECK(!scratch4().is(reg)); |
| 551 | __ push(receiver()); |
| 552 | if (heap()->InNewSpace(callback->data())) { |
| 553 | __ Move(scratch3(), callback); |
| 554 | __ ldr(scratch3(), |
| 555 | FieldMemOperand(scratch3(), ExecutableAccessorInfo::kDataOffset)); |
| 556 | } else { |
| 557 | __ Move(scratch3(), Handle<Object>(callback->data(), isolate())); |
| 558 | } |
| 559 | __ push(scratch3()); |
| 560 | __ LoadRoot(scratch3(), Heap::kUndefinedValueRootIndex); |
| 561 | __ mov(scratch4(), scratch3()); |
| 562 | __ Push(scratch3(), scratch4()); |
| 563 | __ mov(scratch4(), Operand(ExternalReference::isolate_address(isolate()))); |
| 564 | __ Push(scratch4(), reg); |
| 565 | __ mov(scratch2(), sp); // scratch2 = PropertyAccessorInfo::args_ |
| 566 | __ push(name()); |
| 567 | |
| 568 | // Abi for CallApiGetter |
| 569 | Register getter_address_reg = ApiGetterDescriptor::function_address(); |
| 570 | |
| 571 | Address getter_address = v8::ToCData<Address>(callback->getter()); |
| 572 | ApiFunction fun(getter_address); |
| 573 | ExternalReference::Type type = ExternalReference::DIRECT_GETTER_CALL; |
| 574 | ExternalReference ref = ExternalReference(&fun, type, isolate()); |
| 575 | __ mov(getter_address_reg, Operand(ref)); |
| 576 | |
| 577 | CallApiGetterStub stub(isolate()); |
| 578 | __ TailCallStub(&stub); |
| 579 | } |
| 580 | |
| 581 | |
| 582 | void NamedLoadHandlerCompiler::GenerateLoadInterceptorWithFollowup( |
| 583 | LookupIterator* it, Register holder_reg) { |
| 584 | DCHECK(holder()->HasNamedInterceptor()); |
| 585 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 586 | |
| 587 | // Compile the interceptor call, followed by inline code to load the |
| 588 | // property from further up the prototype chain if the call fails. |
| 589 | // Check that the maps haven't changed. |
| 590 | DCHECK(holder_reg.is(receiver()) || holder_reg.is(scratch1())); |
| 591 | |
| 592 | // Preserve the receiver register explicitly whenever it is different from the |
| 593 | // holder and it is needed should the interceptor return without any result. |
| 594 | // The ACCESSOR case needs the receiver to be passed into C++ code, the FIELD |
| 595 | // case might cause a miss during the prototype check. |
| 596 | bool must_perform_prototype_check = |
| 597 | !holder().is_identical_to(it->GetHolder<JSObject>()); |
| 598 | bool must_preserve_receiver_reg = |
| 599 | !receiver().is(holder_reg) && |
| 600 | (it->state() == LookupIterator::ACCESSOR || must_perform_prototype_check); |
| 601 | |
| 602 | // Save necessary data before invoking an interceptor. |
| 603 | // Requires a frame to make GC aware of pushed pointers. |
| 604 | { |
| 605 | FrameAndConstantPoolScope frame_scope(masm(), StackFrame::INTERNAL); |
| 606 | if (must_preserve_receiver_reg) { |
| 607 | __ Push(receiver(), holder_reg, this->name()); |
| 608 | } else { |
| 609 | __ Push(holder_reg, this->name()); |
| 610 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 611 | InterceptorVectorSlotPush(holder_reg); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 612 | // Invoke an interceptor. Note: map checks from receiver to |
| 613 | // interceptor's holder has been compiled before (see a caller |
| 614 | // of this method.) |
| 615 | CompileCallLoadPropertyWithInterceptor( |
| 616 | masm(), receiver(), holder_reg, this->name(), holder(), |
| 617 | IC::kLoadPropertyWithInterceptorOnly); |
| 618 | |
| 619 | // Check if interceptor provided a value for property. If it's |
| 620 | // the case, return immediately. |
| 621 | Label interceptor_failed; |
| 622 | __ LoadRoot(scratch1(), Heap::kNoInterceptorResultSentinelRootIndex); |
| 623 | __ cmp(r0, scratch1()); |
| 624 | __ b(eq, &interceptor_failed); |
| 625 | frame_scope.GenerateLeaveFrame(); |
| 626 | __ Ret(); |
| 627 | |
| 628 | __ bind(&interceptor_failed); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 629 | InterceptorVectorSlotPop(holder_reg); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 630 | __ pop(this->name()); |
| 631 | __ pop(holder_reg); |
| 632 | if (must_preserve_receiver_reg) { |
| 633 | __ pop(receiver()); |
| 634 | } |
| 635 | // Leave the internal frame. |
| 636 | } |
| 637 | |
| 638 | GenerateLoadPostInterceptor(it, holder_reg); |
| 639 | } |
| 640 | |
| 641 | |
| 642 | void NamedLoadHandlerCompiler::GenerateLoadInterceptor(Register holder_reg) { |
| 643 | // Call the runtime system to load the interceptor. |
| 644 | DCHECK(holder()->HasNamedInterceptor()); |
| 645 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 646 | PushInterceptorArguments(masm(), receiver(), holder_reg, this->name(), |
| 647 | holder()); |
| 648 | |
| 649 | ExternalReference ref = ExternalReference( |
| 650 | IC_Utility(IC::kLoadPropertyWithInterceptor), isolate()); |
| 651 | __ TailCallExternalReference( |
| 652 | ref, NamedLoadHandlerCompiler::kInterceptorArgsLength, 1); |
| 653 | } |
| 654 | |
| 655 | |
| 656 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback( |
| 657 | Handle<JSObject> object, Handle<Name> name, |
| 658 | Handle<ExecutableAccessorInfo> callback) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 659 | Register holder_reg = Frontend(name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 660 | |
| 661 | __ push(receiver()); // receiver |
| 662 | __ push(holder_reg); |
| 663 | __ mov(ip, Operand(callback)); // callback info |
| 664 | __ push(ip); |
| 665 | __ mov(ip, Operand(name)); |
| 666 | __ Push(ip, value()); |
| 667 | |
| 668 | // Do tail-call to the runtime system. |
| 669 | ExternalReference store_callback_property = |
| 670 | ExternalReference(IC_Utility(IC::kStoreCallbackProperty), isolate()); |
| 671 | __ TailCallExternalReference(store_callback_property, 5, 1); |
| 672 | |
| 673 | // Return the generated code. |
| 674 | return GetCode(kind(), Code::FAST, name); |
| 675 | } |
| 676 | |
| 677 | |
| 678 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreInterceptor( |
| 679 | Handle<Name> name) { |
| 680 | __ Push(receiver(), this->name(), value()); |
| 681 | |
| 682 | // Do tail-call to the runtime system. |
| 683 | ExternalReference store_ic_property = ExternalReference( |
| 684 | IC_Utility(IC::kStorePropertyWithInterceptor), isolate()); |
| 685 | __ TailCallExternalReference(store_ic_property, 3, 1); |
| 686 | |
| 687 | // Return the generated code. |
| 688 | return GetCode(kind(), Code::FAST, name); |
| 689 | } |
| 690 | |
| 691 | |
| 692 | Register NamedStoreHandlerCompiler::value() { |
| 693 | return StoreDescriptor::ValueRegister(); |
| 694 | } |
| 695 | |
| 696 | |
| 697 | Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal( |
| 698 | Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) { |
| 699 | Label miss; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 700 | if (IC::ICUseVector(kind())) { |
| 701 | PushVectorAndSlot(); |
| 702 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 703 | FrontendHeader(receiver(), name, &miss); |
| 704 | |
| 705 | // Get the value from the cell. |
| 706 | Register result = StoreDescriptor::ValueRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 707 | Handle<WeakCell> weak_cell = factory()->NewWeakCell(cell); |
| 708 | __ LoadWeakValue(result, weak_cell, &miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 709 | __ ldr(result, FieldMemOperand(result, Cell::kValueOffset)); |
| 710 | |
| 711 | // Check for deleted property if property can actually be deleted. |
| 712 | if (is_configurable) { |
| 713 | __ LoadRoot(ip, Heap::kTheHoleValueRootIndex); |
| 714 | __ cmp(result, ip); |
| 715 | __ b(eq, &miss); |
| 716 | } |
| 717 | |
| 718 | Counters* counters = isolate()->counters(); |
| 719 | __ IncrementCounter(counters->named_load_global_stub(), 1, r1, r3); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 720 | if (IC::ICUseVector(kind())) { |
| 721 | DiscardVectorAndSlot(); |
| 722 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 723 | __ Ret(); |
| 724 | |
| 725 | FrontendFooter(name, &miss); |
| 726 | |
| 727 | // Return the generated code. |
| 728 | return GetCode(kind(), Code::NORMAL, name); |
| 729 | } |
| 730 | |
| 731 | |
| 732 | #undef __ |
| 733 | } |
| 734 | } // namespace v8::internal |
| 735 | |
| 736 | #endif // V8_TARGET_ARCH_ARM |