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 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #if V8_TARGET_ARCH_ARM64 |
| 6 | |
| 7 | #include "src/ic/call-optimization.h" |
| 8 | #include "src/ic/handler-compiler.h" |
| 9 | #include "src/ic/ic.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 10 | #include "src/isolate-inl.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 11 | |
| 12 | namespace v8 { |
| 13 | namespace internal { |
| 14 | |
| 15 | #define __ ACCESS_MASM(masm) |
| 16 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 17 | void PropertyHandlerCompiler::PushVectorAndSlot(Register vector, |
| 18 | Register slot) { |
| 19 | MacroAssembler* masm = this->masm(); |
| 20 | __ Push(vector); |
| 21 | __ Push(slot); |
| 22 | } |
| 23 | |
| 24 | |
| 25 | void PropertyHandlerCompiler::PopVectorAndSlot(Register vector, Register slot) { |
| 26 | MacroAssembler* masm = this->masm(); |
| 27 | __ Pop(slot); |
| 28 | __ Pop(vector); |
| 29 | } |
| 30 | |
| 31 | |
| 32 | void PropertyHandlerCompiler::DiscardVectorAndSlot() { |
| 33 | MacroAssembler* masm = this->masm(); |
| 34 | // Remove vector and slot. |
| 35 | __ Drop(2); |
| 36 | } |
| 37 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 38 | |
| 39 | void PropertyHandlerCompiler::GenerateDictionaryNegativeLookup( |
| 40 | MacroAssembler* masm, Label* miss_label, Register receiver, |
| 41 | Handle<Name> name, Register scratch0, Register scratch1) { |
| 42 | DCHECK(!AreAliased(receiver, scratch0, scratch1)); |
| 43 | DCHECK(name->IsUniqueName()); |
| 44 | Counters* counters = masm->isolate()->counters(); |
| 45 | __ IncrementCounter(counters->negative_lookups(), 1, scratch0, scratch1); |
| 46 | __ IncrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1); |
| 47 | |
| 48 | Label done; |
| 49 | |
| 50 | const int kInterceptorOrAccessCheckNeededMask = |
| 51 | (1 << Map::kHasNamedInterceptor) | (1 << Map::kIsAccessCheckNeeded); |
| 52 | |
| 53 | // Bail out if the receiver has a named interceptor or requires access checks. |
| 54 | Register map = scratch1; |
| 55 | __ Ldr(map, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 56 | __ Ldrb(scratch0, FieldMemOperand(map, Map::kBitFieldOffset)); |
| 57 | __ Tst(scratch0, kInterceptorOrAccessCheckNeededMask); |
| 58 | __ B(ne, miss_label); |
| 59 | |
| 60 | // Check that receiver is a JSObject. |
| 61 | __ Ldrb(scratch0, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 62 | __ Cmp(scratch0, FIRST_JS_RECEIVER_TYPE); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 63 | __ B(lt, miss_label); |
| 64 | |
| 65 | // Load properties array. |
| 66 | Register properties = scratch0; |
| 67 | __ Ldr(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset)); |
| 68 | // Check that the properties array is a dictionary. |
| 69 | __ Ldr(map, FieldMemOperand(properties, HeapObject::kMapOffset)); |
| 70 | __ JumpIfNotRoot(map, Heap::kHashTableMapRootIndex, miss_label); |
| 71 | |
| 72 | NameDictionaryLookupStub::GenerateNegativeLookup( |
| 73 | masm, miss_label, &done, receiver, properties, name, scratch1); |
| 74 | __ Bind(&done); |
| 75 | __ DecrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1); |
| 76 | } |
| 77 | |
| 78 | |
| 79 | void NamedLoadHandlerCompiler::GenerateDirectLoadGlobalFunctionPrototype( |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 80 | MacroAssembler* masm, int index, Register result, Label* miss) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 81 | __ LoadNativeContextSlot(index, result); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 82 | // Load its initial map. The global functions all have initial maps. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 83 | __ Ldr(result, |
| 84 | FieldMemOperand(result, JSFunction::kPrototypeOrInitialMapOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 85 | // Load the prototype from the initial map. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 86 | __ Ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 87 | } |
| 88 | |
| 89 | |
| 90 | void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype( |
| 91 | MacroAssembler* masm, Register receiver, Register scratch1, |
| 92 | Register scratch2, Label* miss_label) { |
| 93 | __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label); |
| 94 | // TryGetFunctionPrototype can't put the result directly in x0 because the |
| 95 | // 3 inputs registers can't alias and we call this function from |
| 96 | // LoadIC::GenerateFunctionPrototype, where receiver is x0. So we explicitly |
| 97 | // move the result in x0. |
| 98 | __ Mov(x0, scratch1); |
| 99 | __ Ret(); |
| 100 | } |
| 101 | |
| 102 | |
| 103 | // Generate code to check that a global property cell is empty. Create |
| 104 | // the property cell at compilation time if no cell exists for the |
| 105 | // property. |
| 106 | void PropertyHandlerCompiler::GenerateCheckPropertyCell( |
| 107 | MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name, |
| 108 | Register scratch, Label* miss) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 109 | Handle<PropertyCell> cell = JSGlobalObject::EnsurePropertyCell(global, name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 110 | DCHECK(cell->value()->IsTheHole()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 111 | Handle<WeakCell> weak_cell = masm->isolate()->factory()->NewWeakCell(cell); |
| 112 | __ LoadWeakValue(scratch, weak_cell, miss); |
| 113 | __ Ldr(scratch, FieldMemOperand(scratch, PropertyCell::kValueOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 114 | __ JumpIfNotRoot(scratch, Heap::kTheHoleValueRootIndex, miss); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | static void PushInterceptorArguments(MacroAssembler* masm, Register receiver, |
| 119 | Register holder, Register name, |
| 120 | Handle<JSObject> holder_obj) { |
| 121 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex == 0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 122 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex == 1); |
| 123 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex == 2); |
| 124 | STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsLength == 3); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 125 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 126 | __ Push(name, receiver, holder); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | |
| 130 | static void CompileCallLoadPropertyWithInterceptor( |
| 131 | MacroAssembler* masm, Register receiver, Register holder, Register name, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 132 | Handle<JSObject> holder_obj, Runtime::FunctionId id) { |
| 133 | DCHECK(NamedLoadHandlerCompiler::kInterceptorArgsLength == |
| 134 | Runtime::FunctionForId(id)->nargs); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 135 | PushInterceptorArguments(masm, receiver, holder, name, holder_obj); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 136 | __ CallRuntime(id); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | |
| 140 | // Generate call to api function. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 141 | void PropertyHandlerCompiler::GenerateApiAccessorCall( |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 142 | MacroAssembler* masm, const CallOptimization& optimization, |
| 143 | Handle<Map> receiver_map, Register receiver, Register scratch, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 144 | bool is_store, Register store_parameter, Register accessor_holder, |
| 145 | int accessor_index) { |
| 146 | DCHECK(!AreAliased(accessor_holder, scratch)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 147 | DCHECK(!AreAliased(receiver, scratch)); |
| 148 | |
| 149 | MacroAssembler::PushPopQueue queue(masm); |
| 150 | queue.Queue(receiver); |
| 151 | // Write the arguments to the stack frame. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 152 | if (is_store) { |
| 153 | DCHECK(!receiver.is(store_parameter)); |
| 154 | DCHECK(!scratch.is(store_parameter)); |
| 155 | queue.Queue(store_parameter); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 156 | } |
| 157 | queue.PushQueued(); |
| 158 | |
| 159 | DCHECK(optimization.is_simple_api_call()); |
| 160 | |
| 161 | // Abi for CallApiFunctionStub. |
| 162 | Register callee = x0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 163 | Register data = x4; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 164 | Register holder = x2; |
| 165 | Register api_function_address = x1; |
| 166 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 167 | // Put callee in place. |
| 168 | __ LoadAccessor(callee, accessor_holder, accessor_index, |
| 169 | is_store ? ACCESSOR_SETTER : ACCESSOR_GETTER); |
| 170 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 171 | // Put holder in place. |
| 172 | CallOptimization::HolderLookup holder_lookup; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 173 | int holder_depth = 0; |
| 174 | optimization.LookupHolderOfExpectedType(receiver_map, &holder_lookup, |
| 175 | &holder_depth); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 176 | switch (holder_lookup) { |
| 177 | case CallOptimization::kHolderIsReceiver: |
| 178 | __ Mov(holder, receiver); |
| 179 | break; |
| 180 | case CallOptimization::kHolderFound: |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 181 | __ Ldr(holder, FieldMemOperand(receiver, HeapObject::kMapOffset)); |
| 182 | __ Ldr(holder, FieldMemOperand(holder, Map::kPrototypeOffset)); |
| 183 | for (int i = 1; i < holder_depth; i++) { |
| 184 | __ Ldr(holder, FieldMemOperand(holder, HeapObject::kMapOffset)); |
| 185 | __ Ldr(holder, FieldMemOperand(holder, Map::kPrototypeOffset)); |
| 186 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 187 | break; |
| 188 | case CallOptimization::kHolderNotFound: |
| 189 | UNREACHABLE(); |
| 190 | break; |
| 191 | } |
| 192 | |
| 193 | Isolate* isolate = masm->isolate(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 194 | Handle<CallHandlerInfo> api_call_info = optimization.api_call_info(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 195 | bool call_data_undefined = false; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 196 | // Put call data in place. |
| 197 | if (api_call_info->data()->IsUndefined()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 198 | call_data_undefined = true; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 199 | __ LoadRoot(data, Heap::kUndefinedValueRootIndex); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 200 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 201 | __ Ldr(data, |
| 202 | FieldMemOperand(callee, JSFunction::kSharedFunctionInfoOffset)); |
| 203 | __ Ldr(data, |
| 204 | FieldMemOperand(data, SharedFunctionInfo::kFunctionDataOffset)); |
| 205 | __ Ldr(data, FieldMemOperand(data, FunctionTemplateInfo::kCallCodeOffset)); |
| 206 | __ Ldr(data, FieldMemOperand(data, CallHandlerInfo::kDataOffset)); |
| 207 | } |
| 208 | |
| 209 | if (api_call_info->fast_handler()->IsCode()) { |
| 210 | // Just tail call into the fast handler if present. |
| 211 | __ Jump(handle(Code::cast(api_call_info->fast_handler())), |
| 212 | RelocInfo::CODE_TARGET); |
| 213 | return; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | // Put api_function_address in place. |
| 217 | Address function_address = v8::ToCData<Address>(api_call_info->callback()); |
| 218 | ApiFunction fun(function_address); |
| 219 | ExternalReference ref = ExternalReference( |
| 220 | &fun, ExternalReference::DIRECT_API_CALL, masm->isolate()); |
| 221 | __ Mov(api_function_address, ref); |
| 222 | |
| 223 | // Jump to stub. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 224 | CallApiAccessorStub stub(isolate, is_store, call_data_undefined); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 225 | __ TailCallStub(&stub); |
| 226 | } |
| 227 | |
| 228 | |
| 229 | void NamedStoreHandlerCompiler::GenerateStoreViaSetter( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 230 | MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder, |
| 231 | int accessor_index, int expected_arguments, Register scratch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 232 | // ----------- S t a t e ------------- |
| 233 | // -- lr : return address |
| 234 | // ----------------------------------- |
| 235 | Label miss; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 236 | { |
| 237 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 238 | |
| 239 | // Save value register, so we can restore it later. |
| 240 | __ Push(value()); |
| 241 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 242 | if (accessor_index >= 0) { |
| 243 | DCHECK(!AreAliased(holder, scratch)); |
| 244 | DCHECK(!AreAliased(receiver, scratch)); |
| 245 | DCHECK(!AreAliased(value(), scratch)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 246 | // Call the JavaScript setter with receiver and value on the stack. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 247 | if (map->IsJSGlobalObjectMap()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 248 | // Swap in the global receiver. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 249 | __ Ldr(scratch, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 250 | FieldMemOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 251 | receiver = scratch; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 252 | } |
| 253 | __ Push(receiver, value()); |
| 254 | ParameterCount actual(1); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 255 | ParameterCount expected(expected_arguments); |
| 256 | __ LoadAccessor(x1, holder, accessor_index, ACCESSOR_SETTER); |
| 257 | __ InvokeFunction(x1, expected, actual, CALL_FUNCTION, |
| 258 | CheckDebugStepCallWrapper()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 259 | } else { |
| 260 | // If we generate a global code snippet for deoptimization only, remember |
| 261 | // the place to continue after deoptimization. |
| 262 | masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset()); |
| 263 | } |
| 264 | |
| 265 | // We have to return the passed value, not the return value of the setter. |
| 266 | __ Pop(x0); |
| 267 | |
| 268 | // Restore context register. |
| 269 | __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 270 | } |
| 271 | __ Ret(); |
| 272 | } |
| 273 | |
| 274 | |
| 275 | void NamedLoadHandlerCompiler::GenerateLoadViaGetter( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 276 | MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder, |
| 277 | int accessor_index, int expected_arguments, Register scratch) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 278 | { |
| 279 | FrameScope scope(masm, StackFrame::INTERNAL); |
| 280 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 281 | if (accessor_index >= 0) { |
| 282 | DCHECK(!AreAliased(holder, scratch)); |
| 283 | DCHECK(!AreAliased(receiver, scratch)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 284 | // Call the JavaScript getter with the receiver on the stack. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 285 | if (map->IsJSGlobalObjectMap()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 286 | // Swap in the global receiver. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 287 | __ Ldr(scratch, |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 288 | FieldMemOperand(receiver, JSGlobalObject::kGlobalProxyOffset)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 289 | receiver = scratch; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 290 | } |
| 291 | __ Push(receiver); |
| 292 | ParameterCount actual(0); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 293 | ParameterCount expected(expected_arguments); |
| 294 | __ LoadAccessor(x1, holder, accessor_index, ACCESSOR_GETTER); |
| 295 | __ InvokeFunction(x1, expected, actual, CALL_FUNCTION, |
| 296 | CheckDebugStepCallWrapper()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 297 | } else { |
| 298 | // If we generate a global code snippet for deoptimization only, remember |
| 299 | // the place to continue after deoptimization. |
| 300 | masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset()); |
| 301 | } |
| 302 | |
| 303 | // Restore context register. |
| 304 | __ Ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 305 | } |
| 306 | __ Ret(); |
| 307 | } |
| 308 | |
| 309 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 310 | static void StoreIC_PushArgs(MacroAssembler* masm) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 311 | __ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 312 | StoreDescriptor::ValueRegister(), |
| 313 | VectorStoreICDescriptor::SlotRegister(), |
| 314 | VectorStoreICDescriptor::VectorRegister()); |
| 315 | } |
| 316 | |
| 317 | |
| 318 | void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) { |
| 319 | StoreIC_PushArgs(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 320 | |
| 321 | // The slow case calls into the runtime to complete the store without causing |
| 322 | // an IC miss that would otherwise cause a transition to the generic stub. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 323 | __ TailCallRuntime(Runtime::kStoreIC_Slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | |
| 327 | void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) { |
| 328 | ASM_LOCATION("ElementHandlerCompiler::GenerateStoreSlow"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 329 | StoreIC_PushArgs(masm); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 330 | |
| 331 | // The slow case calls into the runtime to complete the store without causing |
| 332 | // an IC miss that would otherwise cause a transition to the generic stub. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 333 | __ TailCallRuntime(Runtime::kKeyedStoreIC_Slow); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | |
| 337 | #undef __ |
| 338 | #define __ ACCESS_MASM(masm()) |
| 339 | |
| 340 | |
| 341 | Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal( |
| 342 | Handle<PropertyCell> cell, Handle<Name> name, bool is_configurable) { |
| 343 | Label miss; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 344 | if (IC::ICUseVector(kind())) { |
| 345 | PushVectorAndSlot(); |
| 346 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 347 | FrontendHeader(receiver(), name, &miss, DONT_RETURN_ANYTHING); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 348 | |
| 349 | // Get the value from the cell. |
| 350 | Register result = StoreDescriptor::ValueRegister(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 351 | Handle<WeakCell> weak_cell = factory()->NewWeakCell(cell); |
| 352 | __ LoadWeakValue(result, weak_cell, &miss); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 353 | __ Ldr(result, FieldMemOperand(result, PropertyCell::kValueOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 354 | |
| 355 | // Check for deleted property if property can actually be deleted. |
| 356 | if (is_configurable) { |
| 357 | __ JumpIfRoot(result, Heap::kTheHoleValueRootIndex, &miss); |
| 358 | } |
| 359 | |
| 360 | Counters* counters = isolate()->counters(); |
| 361 | __ IncrementCounter(counters->named_load_global_stub(), 1, x1, x3); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 362 | if (IC::ICUseVector(kind())) { |
| 363 | DiscardVectorAndSlot(); |
| 364 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 365 | __ Ret(); |
| 366 | |
| 367 | FrontendFooter(name, &miss); |
| 368 | |
| 369 | // Return the generated code. |
| 370 | return GetCode(kind(), Code::NORMAL, name); |
| 371 | } |
| 372 | |
| 373 | |
| 374 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreInterceptor( |
| 375 | Handle<Name> name) { |
| 376 | Label miss; |
| 377 | |
| 378 | ASM_LOCATION("NamedStoreHandlerCompiler::CompileStoreInterceptor"); |
| 379 | |
| 380 | __ Push(receiver(), this->name(), value()); |
| 381 | |
| 382 | // Do tail-call to the runtime system. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 383 | __ TailCallRuntime(Runtime::kStorePropertyWithInterceptor); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 384 | |
| 385 | // Return the generated code. |
| 386 | return GetCode(kind(), Code::FAST, name); |
| 387 | } |
| 388 | |
| 389 | |
| 390 | Register NamedStoreHandlerCompiler::value() { |
| 391 | return StoreDescriptor::ValueRegister(); |
| 392 | } |
| 393 | |
| 394 | |
| 395 | void NamedStoreHandlerCompiler::GenerateRestoreName(Label* label, |
| 396 | Handle<Name> name) { |
| 397 | if (!label->is_unused()) { |
| 398 | __ Bind(label); |
| 399 | __ Mov(this->name(), Operand(name)); |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 404 | void NamedStoreHandlerCompiler::GenerateRestoreName(Handle<Name> name) { |
| 405 | __ Mov(this->name(), Operand(name)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 409 | void NamedStoreHandlerCompiler::RearrangeVectorAndSlot( |
| 410 | Register current_map, Register destination_map) { |
| 411 | DCHECK(false); // Not implemented. |
| 412 | } |
| 413 | |
| 414 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 415 | void NamedStoreHandlerCompiler::GenerateRestoreMap(Handle<Map> transition, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 416 | Register map_reg, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 417 | Register scratch, |
| 418 | Label* miss) { |
| 419 | Handle<WeakCell> cell = Map::WeakCellForMap(transition); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 420 | DCHECK(!map_reg.is(scratch)); |
| 421 | __ LoadWeakValue(map_reg, cell, miss); |
| 422 | if (transition->CanBeDeprecated()) { |
| 423 | __ Ldrsw(scratch, FieldMemOperand(map_reg, Map::kBitField3Offset)); |
| 424 | __ TestAndBranchIfAnySet(scratch, Map::Deprecated::kMask, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 425 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 426 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 427 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 428 | |
| 429 | void NamedStoreHandlerCompiler::GenerateConstantCheck(Register map_reg, |
| 430 | int descriptor, |
| 431 | Register value_reg, |
| 432 | Register scratch, |
| 433 | Label* miss_label) { |
| 434 | DCHECK(!map_reg.is(scratch)); |
| 435 | DCHECK(!map_reg.is(value_reg)); |
| 436 | DCHECK(!value_reg.is(scratch)); |
| 437 | __ LoadInstanceDescriptors(map_reg, scratch); |
| 438 | __ Ldr(scratch, |
| 439 | FieldMemOperand(scratch, DescriptorArray::GetValueOffset(descriptor))); |
| 440 | __ Cmp(value_reg, scratch); |
| 441 | __ B(ne, miss_label); |
| 442 | } |
| 443 | |
| 444 | |
| 445 | void NamedStoreHandlerCompiler::GenerateFieldTypeChecks(HeapType* field_type, |
| 446 | Register value_reg, |
| 447 | Label* miss_label) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 448 | Register map_reg = scratch1(); |
| 449 | Register scratch = scratch2(); |
| 450 | DCHECK(!value_reg.is(map_reg)); |
| 451 | DCHECK(!value_reg.is(scratch)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 452 | __ JumpIfSmi(value_reg, miss_label); |
| 453 | HeapType::Iterator<Map> it = field_type->Classes(); |
| 454 | if (!it.Done()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 455 | __ Ldr(map_reg, FieldMemOperand(value_reg, HeapObject::kMapOffset)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 456 | Label do_store; |
| 457 | while (true) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 458 | __ CmpWeakValue(map_reg, Map::WeakCellForMap(it.Current()), scratch); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 459 | it.Advance(); |
| 460 | if (it.Done()) { |
| 461 | __ B(ne, miss_label); |
| 462 | break; |
| 463 | } |
| 464 | __ B(eq, &do_store); |
| 465 | } |
| 466 | __ Bind(&do_store); |
| 467 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 468 | } |
| 469 | |
| 470 | |
| 471 | Register PropertyHandlerCompiler::CheckPrototypes( |
| 472 | Register object_reg, Register holder_reg, Register scratch1, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 473 | Register scratch2, Handle<Name> name, Label* miss, PrototypeCheckType check, |
| 474 | ReturnHolder return_what) { |
| 475 | Handle<Map> receiver_map = map(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 476 | |
| 477 | // object_reg and holder_reg registers can alias. |
| 478 | DCHECK(!AreAliased(object_reg, scratch1, scratch2)); |
| 479 | DCHECK(!AreAliased(holder_reg, scratch1, scratch2)); |
| 480 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 481 | if (FLAG_eliminate_prototype_chain_checks) { |
| 482 | Handle<Cell> validity_cell = |
| 483 | Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate()); |
| 484 | if (!validity_cell.is_null()) { |
| 485 | DCHECK_EQ(Smi::FromInt(Map::kPrototypeChainValid), |
| 486 | validity_cell->value()); |
| 487 | __ Mov(scratch1, Operand(validity_cell)); |
| 488 | __ Ldr(scratch1, FieldMemOperand(scratch1, Cell::kValueOffset)); |
| 489 | __ Cmp(scratch1, Operand(Smi::FromInt(Map::kPrototypeChainValid))); |
| 490 | __ B(ne, miss); |
| 491 | } |
| 492 | |
| 493 | // The prototype chain of primitives (and their JSValue wrappers) depends |
| 494 | // on the native context, which can't be guarded by validity cells. |
| 495 | // |object_reg| holds the native context specific prototype in this case; |
| 496 | // we need to check its map. |
| 497 | if (check == CHECK_ALL_MAPS) { |
| 498 | __ Ldr(scratch1, FieldMemOperand(object_reg, HeapObject::kMapOffset)); |
| 499 | Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map); |
| 500 | __ CmpWeakValue(scratch1, cell, scratch2); |
| 501 | __ B(ne, miss); |
| 502 | } |
| 503 | } |
| 504 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 505 | // Keep track of the current object in register reg. |
| 506 | Register reg = object_reg; |
| 507 | int depth = 0; |
| 508 | |
| 509 | Handle<JSObject> current = Handle<JSObject>::null(); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 510 | if (receiver_map->IsJSGlobalObjectMap()) { |
| 511 | current = isolate()->global_object(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 512 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 513 | |
| 514 | // Check access rights to the global object. This has to happen after |
| 515 | // the map check so that we know that the object is actually a global |
| 516 | // object. |
| 517 | // This allows us to install generated handlers for accesses to the |
| 518 | // global proxy (as opposed to using slow ICs). See corresponding code |
| 519 | // in LookupForRead(). |
| 520 | if (receiver_map->IsJSGlobalProxyMap()) { |
| 521 | UseScratchRegisterScope temps(masm()); |
| 522 | __ CheckAccessGlobalProxy(reg, scratch2, temps.AcquireX(), miss); |
| 523 | } |
| 524 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 525 | Handle<JSObject> prototype = Handle<JSObject>::null(); |
| 526 | Handle<Map> current_map = receiver_map; |
| 527 | Handle<Map> holder_map(holder()->map()); |
| 528 | // Traverse the prototype chain and check the maps in the prototype chain for |
| 529 | // fast and global objects or do negative lookup for normal objects. |
| 530 | while (!current_map.is_identical_to(holder_map)) { |
| 531 | ++depth; |
| 532 | |
| 533 | // Only global objects and objects that do not require access |
| 534 | // checks are allowed in stubs. |
| 535 | DCHECK(current_map->IsJSGlobalProxyMap() || |
| 536 | !current_map->is_access_check_needed()); |
| 537 | |
| 538 | prototype = handle(JSObject::cast(current_map->prototype())); |
| 539 | if (current_map->is_dictionary_map() && |
| 540 | !current_map->IsJSGlobalObjectMap()) { |
| 541 | DCHECK(!current_map->IsJSGlobalProxyMap()); // Proxy maps are fast. |
| 542 | if (!name->IsUniqueName()) { |
| 543 | DCHECK(name->IsString()); |
| 544 | name = factory()->InternalizeString(Handle<String>::cast(name)); |
| 545 | } |
| 546 | DCHECK(current.is_null() || (current->property_dictionary()->FindEntry( |
| 547 | name) == NameDictionary::kNotFound)); |
| 548 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 549 | if (FLAG_eliminate_prototype_chain_checks && depth > 1) { |
| 550 | // TODO(jkummerow): Cache and re-use weak cell. |
| 551 | __ LoadWeakValue(reg, isolate()->factory()->NewWeakCell(current), miss); |
| 552 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 553 | GenerateDictionaryNegativeLookup(masm(), miss, reg, name, scratch1, |
| 554 | scratch2); |
| 555 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 556 | if (!FLAG_eliminate_prototype_chain_checks) { |
| 557 | __ Ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| 558 | __ Ldr(holder_reg, FieldMemOperand(scratch1, Map::kPrototypeOffset)); |
| 559 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 560 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 561 | Register map_reg = scratch1; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 562 | if (!FLAG_eliminate_prototype_chain_checks) { |
| 563 | __ Ldr(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| 564 | } |
| 565 | if (current_map->IsJSGlobalObjectMap()) { |
| 566 | GenerateCheckPropertyCell(masm(), Handle<JSGlobalObject>::cast(current), |
| 567 | name, scratch2, miss); |
| 568 | } else if (!FLAG_eliminate_prototype_chain_checks && |
| 569 | (depth != 1 || check == CHECK_ALL_MAPS)) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 570 | Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| 571 | __ CmpWeakValue(map_reg, cell, scratch2); |
| 572 | __ B(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 573 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 574 | if (!FLAG_eliminate_prototype_chain_checks) { |
| 575 | __ Ldr(holder_reg, FieldMemOperand(map_reg, Map::kPrototypeOffset)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 576 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 577 | } |
| 578 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 579 | reg = holder_reg; // From now on the object will be in holder_reg. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 580 | // Go to the next object in the prototype chain. |
| 581 | current = prototype; |
| 582 | current_map = handle(current->map()); |
| 583 | } |
| 584 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 585 | DCHECK(!current_map->IsJSGlobalProxyMap()); |
| 586 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 587 | // Log the check depth. |
| 588 | LOG(isolate(), IntEvent("check-maps-depth", depth + 1)); |
| 589 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 590 | if (!FLAG_eliminate_prototype_chain_checks && |
| 591 | (depth != 0 || check == CHECK_ALL_MAPS)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 592 | // Check the holder map. |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 593 | __ Ldr(scratch1, FieldMemOperand(reg, HeapObject::kMapOffset)); |
| 594 | Handle<WeakCell> cell = Map::WeakCellForMap(current_map); |
| 595 | __ CmpWeakValue(scratch1, cell, scratch2); |
| 596 | __ B(ne, miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 597 | } |
| 598 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 599 | bool return_holder = return_what == RETURN_HOLDER; |
| 600 | if (FLAG_eliminate_prototype_chain_checks && return_holder && depth != 0) { |
| 601 | __ LoadWeakValue(reg, isolate()->factory()->NewWeakCell(current), miss); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 602 | } |
| 603 | |
| 604 | // Return the register containing the holder. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 605 | return return_holder ? reg : no_reg; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | |
| 609 | void NamedLoadHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 610 | if (!miss->is_unused()) { |
| 611 | Label success; |
| 612 | __ B(&success); |
| 613 | |
| 614 | __ Bind(miss); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 615 | if (IC::ICUseVector(kind())) { |
| 616 | DCHECK(kind() == Code::LOAD_IC); |
| 617 | PopVectorAndSlot(); |
| 618 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 619 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 620 | |
| 621 | __ Bind(&success); |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | |
| 626 | void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) { |
| 627 | if (!miss->is_unused()) { |
| 628 | Label success; |
| 629 | __ B(&success); |
| 630 | |
| 631 | GenerateRestoreName(miss, name); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 632 | if (IC::ICUseVector(kind())) PopVectorAndSlot(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 633 | TailCallBuiltin(masm(), MissBuiltin(kind())); |
| 634 | |
| 635 | __ Bind(&success); |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | |
| 640 | void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) { |
| 641 | // Return the constant value. |
| 642 | __ LoadObject(x0, value); |
| 643 | __ Ret(); |
| 644 | } |
| 645 | |
| 646 | |
| 647 | void NamedLoadHandlerCompiler::GenerateLoadCallback( |
| 648 | Register reg, Handle<ExecutableAccessorInfo> callback) { |
| 649 | DCHECK(!AreAliased(scratch2(), scratch3(), scratch4(), reg)); |
| 650 | |
| 651 | // Build ExecutableAccessorInfo::args_ list on the stack and push property |
| 652 | // name below the exit frame to make GC aware of them and store pointers to |
| 653 | // them. |
| 654 | STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 0); |
| 655 | STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 1); |
| 656 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 2); |
| 657 | STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 3); |
| 658 | STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 4); |
| 659 | STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 5); |
| 660 | STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 6); |
| 661 | |
| 662 | __ Push(receiver()); |
| 663 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 664 | Handle<Object> data(callback->data(), isolate()); |
| 665 | if (data->IsUndefined() || data->IsSmi()) { |
| 666 | __ Mov(scratch3(), Operand(data)); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 667 | } else { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 668 | Handle<WeakCell> cell = |
| 669 | isolate()->factory()->NewWeakCell(Handle<HeapObject>::cast(data)); |
| 670 | // The callback is alive if this instruction is executed, |
| 671 | // so the weak cell is not cleared and points to data. |
| 672 | __ GetWeakValue(scratch3(), cell); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 673 | } |
| 674 | __ LoadRoot(scratch4(), Heap::kUndefinedValueRootIndex); |
| 675 | __ Mov(scratch2(), Operand(ExternalReference::isolate_address(isolate()))); |
| 676 | __ Push(scratch3(), scratch4(), scratch4(), scratch2(), reg, name()); |
| 677 | |
| 678 | Register args_addr = scratch2(); |
| 679 | __ Add(args_addr, __ StackPointer(), kPointerSize); |
| 680 | |
| 681 | // Stack at this point: |
| 682 | // sp[40] callback data |
| 683 | // sp[32] undefined |
| 684 | // sp[24] undefined |
| 685 | // sp[16] isolate |
| 686 | // args_addr -> sp[8] reg |
| 687 | // sp[0] name |
| 688 | |
| 689 | // Abi for CallApiGetter. |
| 690 | Register getter_address_reg = x2; |
| 691 | |
| 692 | // Set up the call. |
| 693 | Address getter_address = v8::ToCData<Address>(callback->getter()); |
| 694 | ApiFunction fun(getter_address); |
| 695 | ExternalReference::Type type = ExternalReference::DIRECT_GETTER_CALL; |
| 696 | ExternalReference ref = ExternalReference(&fun, type, isolate()); |
| 697 | __ Mov(getter_address_reg, ref); |
| 698 | |
| 699 | CallApiGetterStub stub(isolate()); |
| 700 | __ TailCallStub(&stub); |
| 701 | } |
| 702 | |
| 703 | |
| 704 | void NamedLoadHandlerCompiler::GenerateLoadInterceptorWithFollowup( |
| 705 | LookupIterator* it, Register holder_reg) { |
| 706 | DCHECK(!AreAliased(receiver(), this->name(), scratch1(), scratch2(), |
| 707 | scratch3())); |
| 708 | DCHECK(holder()->HasNamedInterceptor()); |
| 709 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 710 | |
| 711 | // Compile the interceptor call, followed by inline code to load the |
| 712 | // property from further up the prototype chain if the call fails. |
| 713 | // Check that the maps haven't changed. |
| 714 | DCHECK(holder_reg.is(receiver()) || holder_reg.is(scratch1())); |
| 715 | |
| 716 | // Preserve the receiver register explicitly whenever it is different from the |
| 717 | // holder and it is needed should the interceptor return without any result. |
| 718 | // The ACCESSOR case needs the receiver to be passed into C++ code, the FIELD |
| 719 | // case might cause a miss during the prototype check. |
| 720 | bool must_perform_prototype_check = |
| 721 | !holder().is_identical_to(it->GetHolder<JSObject>()); |
| 722 | bool must_preserve_receiver_reg = |
| 723 | !receiver().is(holder_reg) && |
| 724 | (it->state() == LookupIterator::ACCESSOR || must_perform_prototype_check); |
| 725 | |
| 726 | // Save necessary data before invoking an interceptor. |
| 727 | // Requires a frame to make GC aware of pushed pointers. |
| 728 | { |
| 729 | FrameScope frame_scope(masm(), StackFrame::INTERNAL); |
| 730 | if (must_preserve_receiver_reg) { |
| 731 | __ Push(receiver(), holder_reg, this->name()); |
| 732 | } else { |
| 733 | __ Push(holder_reg, this->name()); |
| 734 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 735 | InterceptorVectorSlotPush(holder_reg); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 736 | // Invoke an interceptor. Note: map checks from receiver to |
| 737 | // interceptor's holder has been compiled before (see a caller |
| 738 | // of this method.) |
| 739 | CompileCallLoadPropertyWithInterceptor( |
| 740 | masm(), receiver(), holder_reg, this->name(), holder(), |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 741 | Runtime::kLoadPropertyWithInterceptorOnly); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 742 | |
| 743 | // Check if interceptor provided a value for property. If it's |
| 744 | // the case, return immediately. |
| 745 | Label interceptor_failed; |
| 746 | __ JumpIfRoot(x0, Heap::kNoInterceptorResultSentinelRootIndex, |
| 747 | &interceptor_failed); |
| 748 | frame_scope.GenerateLeaveFrame(); |
| 749 | __ Ret(); |
| 750 | |
| 751 | __ Bind(&interceptor_failed); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 752 | InterceptorVectorSlotPop(holder_reg); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 753 | if (must_preserve_receiver_reg) { |
| 754 | __ Pop(this->name(), holder_reg, receiver()); |
| 755 | } else { |
| 756 | __ Pop(this->name(), holder_reg); |
| 757 | } |
| 758 | // Leave the internal frame. |
| 759 | } |
| 760 | |
| 761 | GenerateLoadPostInterceptor(it, holder_reg); |
| 762 | } |
| 763 | |
| 764 | |
| 765 | void NamedLoadHandlerCompiler::GenerateLoadInterceptor(Register holder_reg) { |
| 766 | // Call the runtime system to load the interceptor. |
| 767 | DCHECK(holder()->HasNamedInterceptor()); |
| 768 | DCHECK(!holder()->GetNamedInterceptor()->getter()->IsUndefined()); |
| 769 | PushInterceptorArguments(masm(), receiver(), holder_reg, this->name(), |
| 770 | holder()); |
| 771 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 772 | __ TailCallRuntime(Runtime::kLoadPropertyWithInterceptor); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 773 | } |
| 774 | |
| 775 | |
| 776 | Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback( |
| 777 | Handle<JSObject> object, Handle<Name> name, |
| 778 | Handle<ExecutableAccessorInfo> callback) { |
| 779 | ASM_LOCATION("NamedStoreHandlerCompiler::CompileStoreCallback"); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 780 | Register holder_reg = Frontend(name); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 781 | |
| 782 | // Stub never generated for non-global objects that require access checks. |
| 783 | DCHECK(holder()->IsJSGlobalProxy() || !holder()->IsAccessCheckNeeded()); |
| 784 | |
| 785 | // receiver() and holder_reg can alias. |
| 786 | DCHECK(!AreAliased(receiver(), scratch1(), scratch2(), value())); |
| 787 | DCHECK(!AreAliased(holder_reg, scratch1(), scratch2(), value())); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 788 | // If the callback cannot leak, then push the callback directly, |
| 789 | // otherwise wrap it in a weak cell. |
| 790 | if (callback->data()->IsUndefined() || callback->data()->IsSmi()) { |
| 791 | __ Mov(scratch1(), Operand(callback)); |
| 792 | } else { |
| 793 | Handle<WeakCell> cell = isolate()->factory()->NewWeakCell(callback); |
| 794 | __ Mov(scratch1(), Operand(cell)); |
| 795 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 796 | __ Mov(scratch2(), Operand(name)); |
| 797 | __ Push(receiver(), holder_reg, scratch1(), scratch2(), value()); |
| 798 | |
| 799 | // Do tail-call to the runtime system. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 800 | __ TailCallRuntime(Runtime::kStoreCallbackProperty); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 801 | |
| 802 | // Return the generated code. |
| 803 | return GetCode(kind(), Code::FAST, name); |
| 804 | } |
| 805 | |
| 806 | |
| 807 | #undef __ |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 808 | } // namespace internal |
| 809 | } // namespace v8 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 810 | |
| 811 | #endif // V8_TARGET_ARCH_IA32 |