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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 97 ASSERT(p->value != NULL); | 97 ASSERT(p->value != NULL); |
| 98 return reinterpret_cast<Variable*>(p->value); | 98 return reinterpret_cast<Variable*>(p->value); |
| 99 } | 99 } |
| 100 return NULL; | 100 return NULL; |
| 101 } | 101 } |
| 102 | 102 |
| 103 | 103 |
| 104 // ---------------------------------------------------------------------------- | 104 // ---------------------------------------------------------------------------- |
| 105 // Implementation of Scope | 105 // Implementation of Scope |
| 106 | 106 |
| 107 Scope::Scope(Scope* outer_scope, ScopeType type, Zone* zone) | 107 Scope::Scope(Scope* outer_scope, ScopeType scope_type, Zone* zone) |
| 108 : isolate_(zone->isolate()), | 108 : isolate_(zone->isolate()), |
| 109 inner_scopes_(4, zone), | 109 inner_scopes_(4, zone), |
| 110 variables_(zone), | 110 variables_(zone), |
| 111 internals_(4, zone), | 111 internals_(4, zone), |
| 112 temps_(4, zone), | 112 temps_(4, zone), |
| 113 params_(4, zone), | 113 params_(4, zone), |
| 114 unresolved_(16, zone), | 114 unresolved_(16, zone), |
| 115 decls_(4, zone), | 115 decls_(4, zone), |
| 116 interface_(FLAG_harmony_modules && | 116 interface_(FLAG_harmony_modules && |
| 117 (type == MODULE_SCOPE || type == GLOBAL_SCOPE) | 117 (scope_type == MODULE_SCOPE || scope_type == GLOBAL_SCOPE) |
| 118 ? Interface::NewModule(zone) : NULL), | 118 ? Interface::NewModule(zone) : NULL), |
| 119 already_resolved_(false), | 119 already_resolved_(false), |
| 120 zone_(zone) { | 120 zone_(zone) { |
| 121 SetDefaults(type, outer_scope, Handle<ScopeInfo>::null()); | 121 SetDefaults(scope_type, outer_scope, Handle<ScopeInfo>::null()); |
| 122 // The outermost scope must be a global scope. | 122 // The outermost scope must be a global scope. |
| 123 ASSERT(type == GLOBAL_SCOPE || outer_scope != NULL); | 123 ASSERT(scope_type == GLOBAL_SCOPE || outer_scope != NULL); |
| 124 ASSERT(!HasIllegalRedeclaration()); | 124 ASSERT(!HasIllegalRedeclaration()); |
| 125 } | 125 } |
| 126 | 126 |
| 127 | 127 |
| 128 Scope::Scope(Scope* inner_scope, | 128 Scope::Scope(Scope* inner_scope, |
| 129 ScopeType type, | 129 ScopeType scope_type, |
| 130 Handle<ScopeInfo> scope_info, | 130 Handle<ScopeInfo> scope_info, |
| 131 Zone* zone) | 131 Zone* zone) |
| 132 : isolate_(Isolate::Current()), | 132 : isolate_(Isolate::Current()), |
| 133 inner_scopes_(4, zone), | 133 inner_scopes_(4, zone), |
| 134 variables_(zone), | 134 variables_(zone), |
| 135 internals_(4, zone), | 135 internals_(4, zone), |
| 136 temps_(4, zone), | 136 temps_(4, zone), |
| 137 params_(4, zone), | 137 params_(4, zone), |
| 138 unresolved_(16, zone), | 138 unresolved_(16, zone), |
| 139 decls_(4, zone), | 139 decls_(4, zone), |
| 140 interface_(NULL), | 140 interface_(NULL), |
| 141 already_resolved_(true), | 141 already_resolved_(true), |
| 142 zone_(zone) { | 142 zone_(zone) { |
| 143 SetDefaults(type, NULL, scope_info); | 143 SetDefaults(scope_type, NULL, scope_info); |
| 144 if (!scope_info.is_null()) { | 144 if (!scope_info.is_null()) { |
| 145 num_heap_slots_ = scope_info_->ContextLength(); | 145 num_heap_slots_ = scope_info_->ContextLength(); |
| 146 } | 146 } |
| 147 // Ensure at least MIN_CONTEXT_SLOTS to indicate a materialized context. | 147 // Ensure at least MIN_CONTEXT_SLOTS to indicate a materialized context. |
| 148 num_heap_slots_ = Max(num_heap_slots_, | 148 num_heap_slots_ = Max(num_heap_slots_, |
| 149 static_cast<int>(Context::MIN_CONTEXT_SLOTS)); | 149 static_cast<int>(Context::MIN_CONTEXT_SLOTS)); |
| 150 AddInnerScope(inner_scope); | 150 AddInnerScope(inner_scope); |
| 151 } | 151 } |
| 152 | 152 |
| 153 | 153 |
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| 170 Variable* variable = variables_.Declare(this, | 170 Variable* variable = variables_.Declare(this, |
| 171 catch_variable_name, | 171 catch_variable_name, |
| 172 VAR, | 172 VAR, |
| 173 true, // Valid left-hand side. | 173 true, // Valid left-hand side. |
| 174 Variable::NORMAL, | 174 Variable::NORMAL, |
| 175 kCreatedInitialized); | 175 kCreatedInitialized); |
| 176 AllocateHeapSlot(variable); | 176 AllocateHeapSlot(variable); |
| 177 } | 177 } |
| 178 | 178 |
| 179 | 179 |
| 180 void Scope::SetDefaults(ScopeType type, | 180 void Scope::SetDefaults(ScopeType scope_type, |
| 181 Scope* outer_scope, | 181 Scope* outer_scope, |
| 182 Handle<ScopeInfo> scope_info) { | 182 Handle<ScopeInfo> scope_info) { |
| 183 outer_scope_ = outer_scope; | 183 outer_scope_ = outer_scope; |
| 184 type_ = type; | 184 scope_type_ = scope_type; |
| 185 scope_name_ = isolate_->factory()->empty_string(); | 185 scope_name_ = isolate_->factory()->empty_string(); |
| 186 dynamics_ = NULL; | 186 dynamics_ = NULL; |
| 187 receiver_ = NULL; | 187 receiver_ = NULL; |
| 188 function_ = NULL; | 188 function_ = NULL; |
| 189 arguments_ = NULL; | 189 arguments_ = NULL; |
| 190 illegal_redecl_ = NULL; | 190 illegal_redecl_ = NULL; |
| 191 scope_inside_with_ = false; | 191 scope_inside_with_ = false; |
| 192 scope_contains_with_ = false; | 192 scope_contains_with_ = false; |
| 193 scope_calls_eval_ = false; | 193 scope_calls_eval_ = false; |
| 194 // Inherit the strict mode from the parent scope. | 194 // Inherit the strict mode from the parent scope. |
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| 773 ASSERT(beg_pos >= 0 && end_pos >= 0); | 773 ASSERT(beg_pos >= 0 && end_pos >= 0); |
| 774 if (beg_pos <= position && position < end_pos) { | 774 if (beg_pos <= position && position < end_pos) { |
| 775 scope->GetNestedScopeChain(chain, position); | 775 scope->GetNestedScopeChain(chain, position); |
| 776 return; | 776 return; |
| 777 } | 777 } |
| 778 } | 778 } |
| 779 } | 779 } |
| 780 | 780 |
| 781 | 781 |
| 782 #ifdef DEBUG | 782 #ifdef DEBUG |
| 783 static const char* Header(ScopeType type) { | 783 static const char* Header(ScopeType scope_type) { |
| 784 switch (type) { | 784 switch (scope_type) { |
| 785 case EVAL_SCOPE: return "eval"; | 785 case EVAL_SCOPE: return "eval"; |
| 786 case FUNCTION_SCOPE: return "function"; | 786 case FUNCTION_SCOPE: return "function"; |
| 787 case MODULE_SCOPE: return "module"; | 787 case MODULE_SCOPE: return "module"; |
| 788 case GLOBAL_SCOPE: return "global"; | 788 case GLOBAL_SCOPE: return "global"; |
| 789 case CATCH_SCOPE: return "catch"; | 789 case CATCH_SCOPE: return "catch"; |
| 790 case BLOCK_SCOPE: return "block"; | 790 case BLOCK_SCOPE: return "block"; |
| 791 case WITH_SCOPE: return "with"; | 791 case WITH_SCOPE: return "with"; |
| 792 } | 792 } |
| 793 UNREACHABLE(); | 793 UNREACHABLE(); |
| 794 return NULL; | 794 return NULL; |
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| 848 PrintVar(indent, var); | 848 PrintVar(indent, var); |
| 849 } | 849 } |
| 850 } | 850 } |
| 851 | 851 |
| 852 | 852 |
| 853 void Scope::Print(int n) { | 853 void Scope::Print(int n) { |
| 854 int n0 = (n > 0 ? n : 0); | 854 int n0 = (n > 0 ? n : 0); |
| 855 int n1 = n0 + 2; // indentation | 855 int n1 = n0 + 2; // indentation |
| 856 | 856 |
| 857 // Print header. | 857 // Print header. |
| 858 Indent(n0, Header(type_)); | 858 Indent(n0, Header(scope_type_)); |
| 859 if (scope_name_->length() > 0) { | 859 if (scope_name_->length() > 0) { |
| 860 PrintF(" "); | 860 PrintF(" "); |
| 861 PrintName(scope_name_); | 861 PrintName(scope_name_); |
| 862 } | 862 } |
| 863 | 863 |
| 864 // Print parameters, if any. | 864 // Print parameters, if any. |
| 865 if (is_function_scope()) { | 865 if (is_function_scope()) { |
| 866 PrintF(" ("); | 866 PrintF(" ("); |
| 867 for (int i = 0; i < params_.length(); i++) { | 867 for (int i = 0; i < params_.length(); i++) { |
| 868 if (i > 0) PrintF(", "); | 868 if (i > 0) PrintF(", "); |
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| 1393 } | 1393 } |
| 1394 | 1394 |
| 1395 | 1395 |
| 1396 int Scope::ContextLocalCount() const { | 1396 int Scope::ContextLocalCount() const { |
| 1397 if (num_heap_slots() == 0) return 0; | 1397 if (num_heap_slots() == 0) return 0; |
| 1398 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - | 1398 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - |
| 1399 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); | 1399 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); |
| 1400 } | 1400 } |
| 1401 | 1401 |
| 1402 } } // namespace v8::internal | 1402 } } // namespace v8::internal |
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