Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [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 | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 5 | #include "src/runtime/runtime-utils.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 6 | |
| 7 | #include "src/allocation-site-scopes.h" |
| 8 | #include "src/arguments.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 9 | #include "src/ast/ast.h" |
| 10 | #include "src/isolate-inl.h" |
| 11 | #include "src/parsing/parser.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 12 | #include "src/runtime/runtime.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 13 | |
| 14 | namespace v8 { |
| 15 | namespace internal { |
| 16 | |
| 17 | static Handle<Map> ComputeObjectLiteralMap( |
| 18 | Handle<Context> context, Handle<FixedArray> constant_properties, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 19 | bool* is_result_from_cache) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 20 | int properties_length = constant_properties->length(); |
| 21 | int number_of_properties = properties_length / 2; |
| 22 | |
| 23 | for (int p = 0; p != properties_length; p += 2) { |
| 24 | Object* key = constant_properties->get(p); |
| 25 | uint32_t element_index = 0; |
| 26 | if (key->ToArrayIndex(&element_index)) { |
| 27 | // An index key does not require space in the property backing store. |
| 28 | number_of_properties--; |
| 29 | } |
| 30 | } |
| 31 | Isolate* isolate = context->GetIsolate(); |
| 32 | return isolate->factory()->ObjectLiteralMapFromCache( |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 33 | context, number_of_properties, is_result_from_cache); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 34 | } |
| 35 | |
| 36 | MUST_USE_RESULT static MaybeHandle<Object> CreateLiteralBoilerplate( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 37 | Isolate* isolate, Handle<LiteralsArray> literals, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 38 | Handle<FixedArray> constant_properties); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 39 | |
| 40 | MUST_USE_RESULT static MaybeHandle<Object> CreateObjectLiteralBoilerplate( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 41 | Isolate* isolate, Handle<LiteralsArray> literals, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 42 | Handle<FixedArray> constant_properties, bool should_have_fast_elements) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 43 | Handle<Context> context = isolate->native_context(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 44 | |
| 45 | // In case we have function literals, we want the object to be in |
| 46 | // slow properties mode for now. We don't go in the map cache because |
| 47 | // maps with constant functions can't be shared if the functions are |
| 48 | // not the same (which is the common case). |
| 49 | bool is_result_from_cache = false; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 50 | Handle<Map> map = ComputeObjectLiteralMap(context, constant_properties, |
| 51 | &is_result_from_cache); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 52 | |
| 53 | PretenureFlag pretenure_flag = |
| 54 | isolate->heap()->InNewSpace(*literals) ? NOT_TENURED : TENURED; |
| 55 | |
| 56 | Handle<JSObject> boilerplate = |
| 57 | isolate->factory()->NewJSObjectFromMap(map, pretenure_flag); |
| 58 | |
| 59 | // Normalize the elements of the boilerplate to save space if needed. |
| 60 | if (!should_have_fast_elements) JSObject::NormalizeElements(boilerplate); |
| 61 | |
| 62 | // Add the constant properties to the boilerplate. |
| 63 | int length = constant_properties->length(); |
| 64 | bool should_transform = |
| 65 | !is_result_from_cache && boilerplate->HasFastProperties(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 66 | bool should_normalize = should_transform; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 67 | if (should_normalize) { |
| 68 | // TODO(verwaest): We might not want to ever normalize here. |
| 69 | JSObject::NormalizeProperties(boilerplate, KEEP_INOBJECT_PROPERTIES, |
| 70 | length / 2, "Boilerplate"); |
| 71 | } |
| 72 | // TODO(verwaest): Support tracking representations in the boilerplate. |
| 73 | for (int index = 0; index < length; index += 2) { |
| 74 | Handle<Object> key(constant_properties->get(index + 0), isolate); |
| 75 | Handle<Object> value(constant_properties->get(index + 1), isolate); |
| 76 | if (value->IsFixedArray()) { |
| 77 | // The value contains the constant_properties of a |
| 78 | // simple object or array literal. |
| 79 | Handle<FixedArray> array = Handle<FixedArray>::cast(value); |
| 80 | ASSIGN_RETURN_ON_EXCEPTION( |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 81 | isolate, value, CreateLiteralBoilerplate(isolate, literals, array), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 82 | Object); |
| 83 | } |
| 84 | MaybeHandle<Object> maybe_result; |
| 85 | uint32_t element_index = 0; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 86 | if (key->ToArrayIndex(&element_index)) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 87 | // Array index (uint32). |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 88 | if (value->IsUninitialized(isolate)) { |
| 89 | value = handle(Smi::FromInt(0), isolate); |
| 90 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 91 | maybe_result = JSObject::SetOwnElementIgnoreAttributes( |
| 92 | boilerplate, element_index, value, NONE); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 93 | } else { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 94 | Handle<String> name = Handle<String>::cast(key); |
| 95 | DCHECK(!name->AsArrayIndex(&element_index)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 96 | maybe_result = JSObject::SetOwnPropertyIgnoreAttributes(boilerplate, name, |
| 97 | value, NONE); |
| 98 | } |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 99 | RETURN_ON_EXCEPTION(isolate, maybe_result, Object); |
| 100 | } |
| 101 | |
| 102 | // Transform to fast properties if necessary. For object literals with |
| 103 | // containing function literals we defer this operation until after all |
| 104 | // computed properties have been assigned so that we can generate |
| 105 | // constant function properties. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 106 | if (should_transform) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 107 | JSObject::MigrateSlowToFast(boilerplate, |
| 108 | boilerplate->map()->unused_property_fields(), |
| 109 | "FastLiteral"); |
| 110 | } |
| 111 | return boilerplate; |
| 112 | } |
| 113 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 114 | static MaybeHandle<Object> CreateArrayLiteralBoilerplate( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 115 | Isolate* isolate, Handle<LiteralsArray> literals, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 116 | Handle<FixedArray> elements) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 117 | // Create the JSArray. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 118 | Handle<JSFunction> constructor = isolate->array_function(); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 119 | |
| 120 | PretenureFlag pretenure_flag = |
| 121 | isolate->heap()->InNewSpace(*literals) ? NOT_TENURED : TENURED; |
| 122 | |
| 123 | Handle<JSArray> object = Handle<JSArray>::cast( |
| 124 | isolate->factory()->NewJSObject(constructor, pretenure_flag)); |
| 125 | |
| 126 | ElementsKind constant_elements_kind = |
| 127 | static_cast<ElementsKind>(Smi::cast(elements->get(0))->value()); |
| 128 | Handle<FixedArrayBase> constant_elements_values( |
| 129 | FixedArrayBase::cast(elements->get(1))); |
| 130 | |
| 131 | { |
| 132 | DisallowHeapAllocation no_gc; |
| 133 | DCHECK(IsFastElementsKind(constant_elements_kind)); |
| 134 | Context* native_context = isolate->context()->native_context(); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 135 | Object* map = |
| 136 | native_context->get(Context::ArrayMapIndex(constant_elements_kind)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 137 | object->set_map(Map::cast(map)); |
| 138 | } |
| 139 | |
| 140 | Handle<FixedArrayBase> copied_elements_values; |
| 141 | if (IsFastDoubleElementsKind(constant_elements_kind)) { |
| 142 | copied_elements_values = isolate->factory()->CopyFixedDoubleArray( |
| 143 | Handle<FixedDoubleArray>::cast(constant_elements_values)); |
| 144 | } else { |
| 145 | DCHECK(IsFastSmiOrObjectElementsKind(constant_elements_kind)); |
| 146 | const bool is_cow = (constant_elements_values->map() == |
| 147 | isolate->heap()->fixed_cow_array_map()); |
| 148 | if (is_cow) { |
| 149 | copied_elements_values = constant_elements_values; |
| 150 | #if DEBUG |
| 151 | Handle<FixedArray> fixed_array_values = |
| 152 | Handle<FixedArray>::cast(copied_elements_values); |
| 153 | for (int i = 0; i < fixed_array_values->length(); i++) { |
| 154 | DCHECK(!fixed_array_values->get(i)->IsFixedArray()); |
| 155 | } |
| 156 | #endif |
| 157 | } else { |
| 158 | Handle<FixedArray> fixed_array_values = |
| 159 | Handle<FixedArray>::cast(constant_elements_values); |
| 160 | Handle<FixedArray> fixed_array_values_copy = |
| 161 | isolate->factory()->CopyFixedArray(fixed_array_values); |
| 162 | copied_elements_values = fixed_array_values_copy; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 163 | FOR_WITH_HANDLE_SCOPE( |
| 164 | isolate, int, i = 0, i, i < fixed_array_values->length(), i++, { |
| 165 | if (fixed_array_values->get(i)->IsFixedArray()) { |
| 166 | // The value contains the constant_properties of a |
| 167 | // simple object or array literal. |
| 168 | Handle<FixedArray> fa( |
| 169 | FixedArray::cast(fixed_array_values->get(i))); |
| 170 | Handle<Object> result; |
| 171 | ASSIGN_RETURN_ON_EXCEPTION( |
| 172 | isolate, result, |
| 173 | CreateLiteralBoilerplate(isolate, literals, fa), Object); |
| 174 | fixed_array_values_copy->set(i, *result); |
| 175 | } |
| 176 | }); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 177 | } |
| 178 | } |
| 179 | object->set_elements(*copied_elements_values); |
| 180 | object->set_length(Smi::FromInt(copied_elements_values->length())); |
| 181 | |
| 182 | JSObject::ValidateElements(object); |
| 183 | return object; |
| 184 | } |
| 185 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 186 | MUST_USE_RESULT static MaybeHandle<Object> CreateLiteralBoilerplate( |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 187 | Isolate* isolate, Handle<LiteralsArray> literals, |
| 188 | Handle<FixedArray> array) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 189 | Handle<FixedArray> elements = CompileTimeValue::GetElements(array); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 190 | switch (CompileTimeValue::GetLiteralType(array)) { |
| 191 | case CompileTimeValue::OBJECT_LITERAL_FAST_ELEMENTS: |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 192 | return CreateObjectLiteralBoilerplate(isolate, literals, elements, true); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 193 | case CompileTimeValue::OBJECT_LITERAL_SLOW_ELEMENTS: |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 194 | return CreateObjectLiteralBoilerplate(isolate, literals, elements, false); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 195 | case CompileTimeValue::ARRAY_LITERAL: |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 196 | return CreateArrayLiteralBoilerplate(isolate, literals, elements); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 197 | default: |
| 198 | UNREACHABLE(); |
| 199 | return MaybeHandle<Object>(); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 204 | RUNTIME_FUNCTION(Runtime_CreateRegExpLiteral) { |
| 205 | HandleScope scope(isolate); |
| 206 | DCHECK_EQ(4, args.length()); |
| 207 | CONVERT_ARG_HANDLE_CHECKED(JSFunction, closure, 0); |
| 208 | CONVERT_SMI_ARG_CHECKED(index, 1); |
| 209 | CONVERT_ARG_HANDLE_CHECKED(String, pattern, 2); |
| 210 | CONVERT_SMI_ARG_CHECKED(flags, 3); |
| 211 | |
| 212 | // Check if boilerplate exists. If not, create it first. |
| 213 | Handle<Object> boilerplate(closure->literals()->literal(index), isolate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 214 | if (boilerplate->IsUndefined(isolate)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 215 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 216 | isolate, boilerplate, JSRegExp::New(pattern, JSRegExp::Flags(flags))); |
| 217 | closure->literals()->set_literal(index, *boilerplate); |
| 218 | } |
| 219 | return *JSRegExp::Copy(Handle<JSRegExp>::cast(boilerplate)); |
| 220 | } |
| 221 | |
| 222 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 223 | RUNTIME_FUNCTION(Runtime_CreateObjectLiteral) { |
| 224 | HandleScope scope(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 225 | DCHECK_EQ(4, args.length()); |
| 226 | CONVERT_ARG_HANDLE_CHECKED(JSFunction, closure, 0); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 227 | CONVERT_SMI_ARG_CHECKED(literals_index, 1); |
| 228 | CONVERT_ARG_HANDLE_CHECKED(FixedArray, constant_properties, 2); |
| 229 | CONVERT_SMI_ARG_CHECKED(flags, 3); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 230 | Handle<LiteralsArray> literals(closure->literals(), isolate); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 231 | bool should_have_fast_elements = (flags & ObjectLiteral::kFastElements) != 0; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 232 | bool enable_mementos = (flags & ObjectLiteral::kDisableMementos) == 0; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 233 | |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 234 | CHECK(literals_index >= 0); |
| 235 | CHECK(literals_index < literals->literals_count()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 236 | |
| 237 | // Check if boilerplate exists. If not, create it first. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 238 | Handle<Object> literal_site(literals->literal(literals_index), isolate); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 239 | Handle<AllocationSite> site; |
| 240 | Handle<JSObject> boilerplate; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 241 | if (literal_site->IsUndefined(isolate)) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 242 | Handle<Object> raw_boilerplate; |
| 243 | ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 244 | isolate, raw_boilerplate, |
| 245 | CreateObjectLiteralBoilerplate(isolate, literals, constant_properties, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 246 | should_have_fast_elements)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 247 | boilerplate = Handle<JSObject>::cast(raw_boilerplate); |
| 248 | |
| 249 | AllocationSiteCreationContext creation_context(isolate); |
| 250 | site = creation_context.EnterNewScope(); |
| 251 | RETURN_FAILURE_ON_EXCEPTION( |
| 252 | isolate, JSObject::DeepWalk(boilerplate, &creation_context)); |
| 253 | creation_context.ExitScope(site, boilerplate); |
| 254 | |
| 255 | // Update the functions literal and return the boilerplate. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 256 | literals->set_literal(literals_index, *site); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 257 | } else { |
| 258 | site = Handle<AllocationSite>::cast(literal_site); |
| 259 | boilerplate = |
| 260 | Handle<JSObject>(JSObject::cast(site->transition_info()), isolate); |
| 261 | } |
| 262 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 263 | AllocationSiteUsageContext usage_context(isolate, site, enable_mementos); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 264 | usage_context.EnterNewScope(); |
| 265 | MaybeHandle<Object> maybe_copy = |
| 266 | JSObject::DeepCopy(boilerplate, &usage_context); |
| 267 | usage_context.ExitScope(site, boilerplate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 268 | RETURN_RESULT_OR_FAILURE(isolate, maybe_copy); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 269 | } |
| 270 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 271 | MUST_USE_RESULT static MaybeHandle<AllocationSite> GetLiteralAllocationSite( |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 272 | Isolate* isolate, Handle<LiteralsArray> literals, int literals_index, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 273 | Handle<FixedArray> elements) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 274 | // Check if boilerplate exists. If not, create it first. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 275 | Handle<Object> literal_site(literals->literal(literals_index), isolate); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 276 | Handle<AllocationSite> site; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 277 | if (literal_site->IsUndefined(isolate)) { |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 278 | DCHECK(*elements != isolate->heap()->empty_fixed_array()); |
| 279 | Handle<Object> boilerplate; |
| 280 | ASSIGN_RETURN_ON_EXCEPTION( |
| 281 | isolate, boilerplate, |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 282 | CreateArrayLiteralBoilerplate(isolate, literals, elements), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 283 | AllocationSite); |
| 284 | |
| 285 | AllocationSiteCreationContext creation_context(isolate); |
| 286 | site = creation_context.EnterNewScope(); |
| 287 | if (JSObject::DeepWalk(Handle<JSObject>::cast(boilerplate), |
| 288 | &creation_context).is_null()) { |
| 289 | return Handle<AllocationSite>::null(); |
| 290 | } |
| 291 | creation_context.ExitScope(site, Handle<JSObject>::cast(boilerplate)); |
| 292 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 293 | literals->set_literal(literals_index, *site); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 294 | } else { |
| 295 | site = Handle<AllocationSite>::cast(literal_site); |
| 296 | } |
| 297 | |
| 298 | return site; |
| 299 | } |
| 300 | |
| 301 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 302 | static MaybeHandle<JSObject> CreateArrayLiteralImpl( |
| 303 | Isolate* isolate, Handle<LiteralsArray> literals, int literals_index, |
| 304 | Handle<FixedArray> elements, int flags) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 305 | CHECK(literals_index >= 0 && literals_index < literals->literals_count()); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 306 | Handle<AllocationSite> site; |
| 307 | ASSIGN_RETURN_ON_EXCEPTION( |
| 308 | isolate, site, |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 309 | GetLiteralAllocationSite(isolate, literals, literals_index, elements), |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 310 | JSObject); |
| 311 | |
| 312 | bool enable_mementos = (flags & ArrayLiteral::kDisableMementos) == 0; |
| 313 | Handle<JSObject> boilerplate(JSObject::cast(site->transition_info())); |
| 314 | AllocationSiteUsageContext usage_context(isolate, site, enable_mementos); |
| 315 | usage_context.EnterNewScope(); |
| 316 | JSObject::DeepCopyHints hints = (flags & ArrayLiteral::kShallowElements) == 0 |
| 317 | ? JSObject::kNoHints |
| 318 | : JSObject::kObjectIsShallow; |
| 319 | MaybeHandle<JSObject> copy = |
| 320 | JSObject::DeepCopy(boilerplate, &usage_context, hints); |
| 321 | usage_context.ExitScope(site, boilerplate); |
| 322 | return copy; |
| 323 | } |
| 324 | |
| 325 | |
| 326 | RUNTIME_FUNCTION(Runtime_CreateArrayLiteral) { |
| 327 | HandleScope scope(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 328 | DCHECK_EQ(4, args.length()); |
| 329 | CONVERT_ARG_HANDLE_CHECKED(JSFunction, closure, 0); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 330 | CONVERT_SMI_ARG_CHECKED(literals_index, 1); |
| 331 | CONVERT_ARG_HANDLE_CHECKED(FixedArray, elements, 2); |
| 332 | CONVERT_SMI_ARG_CHECKED(flags, 3); |
| 333 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 334 | Handle<LiteralsArray> literals(closure->literals(), isolate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 335 | RETURN_RESULT_OR_FAILURE( |
| 336 | isolate, CreateArrayLiteralImpl(isolate, literals, literals_index, |
| 337 | elements, flags)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | |
| 341 | RUNTIME_FUNCTION(Runtime_CreateArrayLiteralStubBailout) { |
| 342 | HandleScope scope(isolate); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 343 | DCHECK_EQ(3, args.length()); |
| 344 | CONVERT_ARG_HANDLE_CHECKED(JSFunction, closure, 0); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 345 | CONVERT_SMI_ARG_CHECKED(literals_index, 1); |
| 346 | CONVERT_ARG_HANDLE_CHECKED(FixedArray, elements, 2); |
| 347 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 348 | Handle<LiteralsArray> literals(closure->literals(), isolate); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 349 | RETURN_RESULT_OR_FAILURE( |
| 350 | isolate, |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 351 | CreateArrayLiteralImpl(isolate, literals, literals_index, elements, |
| 352 | ArrayLiteral::kShallowElements)); |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 353 | } |
| 354 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 355 | } // namespace internal |
| 356 | } // namespace v8 |