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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #include "src/scopes.h" | 7 #include "src/scopes.h" |
8 | 8 |
9 #include "src/accessors.h" | 9 #include "src/accessors.h" |
10 #include "src/bootstrapper.h" | 10 #include "src/bootstrapper.h" |
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153 scope_type_ = scope_type; | 153 scope_type_ = scope_type; |
154 scope_name_ = ast_value_factory_->empty_string(); | 154 scope_name_ = ast_value_factory_->empty_string(); |
155 dynamics_ = NULL; | 155 dynamics_ = NULL; |
156 receiver_ = NULL; | 156 receiver_ = NULL; |
157 function_ = NULL; | 157 function_ = NULL; |
158 arguments_ = NULL; | 158 arguments_ = NULL; |
159 illegal_redecl_ = NULL; | 159 illegal_redecl_ = NULL; |
160 scope_inside_with_ = false; | 160 scope_inside_with_ = false; |
161 scope_contains_with_ = false; | 161 scope_contains_with_ = false; |
162 scope_calls_eval_ = false; | 162 scope_calls_eval_ = false; |
| 163 scope_uses_this_ = false; |
| 164 scope_uses_arguments_ = false; |
163 // Inherit the strict mode from the parent scope. | 165 // Inherit the strict mode from the parent scope. |
164 strict_mode_ = outer_scope != NULL ? outer_scope->strict_mode_ : SLOPPY; | 166 strict_mode_ = outer_scope != NULL ? outer_scope->strict_mode_ : SLOPPY; |
165 outer_scope_calls_sloppy_eval_ = false; | 167 outer_scope_calls_sloppy_eval_ = false; |
166 inner_scope_calls_eval_ = false; | 168 inner_scope_calls_eval_ = false; |
| 169 inner_scope_uses_this_ = false; |
| 170 inner_scope_uses_arguments_ = false; |
167 force_eager_compilation_ = false; | 171 force_eager_compilation_ = false; |
168 force_context_allocation_ = (outer_scope != NULL && !is_function_scope()) | 172 force_context_allocation_ = (outer_scope != NULL && !is_function_scope()) |
169 ? outer_scope->has_forced_context_allocation() : false; | 173 ? outer_scope->has_forced_context_allocation() : false; |
170 num_var_or_const_ = 0; | 174 num_var_or_const_ = 0; |
171 num_stack_slots_ = 0; | 175 num_stack_slots_ = 0; |
172 num_heap_slots_ = 0; | 176 num_heap_slots_ = 0; |
173 num_modules_ = 0; | 177 num_modules_ = 0; |
174 module_var_ = NULL, | 178 module_var_ = NULL, |
175 scope_info_ = scope_info; | 179 scope_info_ = scope_info; |
176 start_position_ = RelocInfo::kNoPosition; | 180 start_position_ = RelocInfo::kNoPosition; |
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875 // Scope info. | 879 // Scope info. |
876 if (HasTrivialOuterContext()) { | 880 if (HasTrivialOuterContext()) { |
877 Indent(n1, "// scope has trivial outer context\n"); | 881 Indent(n1, "// scope has trivial outer context\n"); |
878 } | 882 } |
879 if (strict_mode() == STRICT) { | 883 if (strict_mode() == STRICT) { |
880 Indent(n1, "// strict mode scope\n"); | 884 Indent(n1, "// strict mode scope\n"); |
881 } | 885 } |
882 if (scope_inside_with_) Indent(n1, "// scope inside 'with'\n"); | 886 if (scope_inside_with_) Indent(n1, "// scope inside 'with'\n"); |
883 if (scope_contains_with_) Indent(n1, "// scope contains 'with'\n"); | 887 if (scope_contains_with_) Indent(n1, "// scope contains 'with'\n"); |
884 if (scope_calls_eval_) Indent(n1, "// scope calls 'eval'\n"); | 888 if (scope_calls_eval_) Indent(n1, "// scope calls 'eval'\n"); |
| 889 if (scope_uses_this_) Indent(n1, "// scope uses 'this'\n"); |
| 890 if (scope_uses_arguments_) Indent(n1, "// scope uses 'arguments'\n"); |
| 891 if (inner_scope_uses_this_) Indent(n1, "// inner scope uses 'this'\n"); |
| 892 if (inner_scope_uses_arguments_) { |
| 893 Indent(n1, "// inner scope uses 'arguments'\n"); |
| 894 } |
885 if (outer_scope_calls_sloppy_eval_) { | 895 if (outer_scope_calls_sloppy_eval_) { |
886 Indent(n1, "// outer scope calls 'eval' in sloppy context\n"); | 896 Indent(n1, "// outer scope calls 'eval' in sloppy context\n"); |
887 } | 897 } |
888 if (inner_scope_calls_eval_) Indent(n1, "// inner scope calls 'eval'\n"); | 898 if (inner_scope_calls_eval_) Indent(n1, "// inner scope calls 'eval'\n"); |
889 if (num_stack_slots_ > 0) { Indent(n1, "// "); | 899 if (num_stack_slots_ > 0) { Indent(n1, "// "); |
890 PrintF("%d stack slots\n", num_stack_slots_); } | 900 PrintF("%d stack slots\n", num_stack_slots_); } |
891 if (num_heap_slots_ > 0) { Indent(n1, "// "); | 901 if (num_heap_slots_ > 0) { Indent(n1, "// "); |
892 PrintF("%d heap slots\n", num_heap_slots_); } | 902 PrintF("%d heap slots\n", num_heap_slots_); } |
893 | 903 |
894 // Print locals. | 904 // Print locals. |
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1154 } | 1164 } |
1155 | 1165 |
1156 bool calls_sloppy_eval = | 1166 bool calls_sloppy_eval = |
1157 this->calls_sloppy_eval() || outer_scope_calls_sloppy_eval_; | 1167 this->calls_sloppy_eval() || outer_scope_calls_sloppy_eval_; |
1158 for (int i = 0; i < inner_scopes_.length(); i++) { | 1168 for (int i = 0; i < inner_scopes_.length(); i++) { |
1159 Scope* inner = inner_scopes_[i]; | 1169 Scope* inner = inner_scopes_[i]; |
1160 inner->PropagateScopeInfo(calls_sloppy_eval); | 1170 inner->PropagateScopeInfo(calls_sloppy_eval); |
1161 if (inner->scope_calls_eval_ || inner->inner_scope_calls_eval_) { | 1171 if (inner->scope_calls_eval_ || inner->inner_scope_calls_eval_) { |
1162 inner_scope_calls_eval_ = true; | 1172 inner_scope_calls_eval_ = true; |
1163 } | 1173 } |
| 1174 if (inner->scope_uses_this_ || inner->inner_scope_uses_this_) { |
| 1175 inner_scope_uses_this_ = true; |
| 1176 } |
| 1177 if (inner->scope_uses_arguments_ || inner->inner_scope_uses_arguments_) { |
| 1178 inner_scope_uses_arguments_ = true; |
| 1179 } |
1164 if (inner->force_eager_compilation_) { | 1180 if (inner->force_eager_compilation_) { |
1165 force_eager_compilation_ = true; | 1181 force_eager_compilation_ = true; |
1166 } | 1182 } |
1167 } | 1183 } |
1168 } | 1184 } |
1169 | 1185 |
1170 | 1186 |
1171 bool Scope::MustAllocate(Variable* var) { | 1187 bool Scope::MustAllocate(Variable* var) { |
1172 // Give var a read/write use if there is a chance it might be accessed | 1188 // Give var a read/write use if there is a chance it might be accessed |
1173 // via an eval() call. This is only possible if the variable has a | 1189 // via an eval() call. This is only possible if the variable has a |
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1394 } | 1410 } |
1395 | 1411 |
1396 | 1412 |
1397 int Scope::ContextLocalCount() const { | 1413 int Scope::ContextLocalCount() const { |
1398 if (num_heap_slots() == 0) return 0; | 1414 if (num_heap_slots() == 0) return 0; |
1399 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - | 1415 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - |
1400 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); | 1416 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); |
1401 } | 1417 } |
1402 | 1418 |
1403 } } // namespace v8::internal | 1419 } } // namespace v8::internal |
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