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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_arguments_ = false; |
| 164 scope_uses_super_ = false; |
163 scope_uses_this_ = false; | 165 scope_uses_this_ = false; |
164 scope_uses_arguments_ = false; | |
165 asm_module_ = false; | 166 asm_module_ = false; |
166 asm_function_ = outer_scope != NULL && outer_scope->asm_module_; | 167 asm_function_ = outer_scope != NULL && outer_scope->asm_module_; |
167 // Inherit the strict mode from the parent scope. | 168 // Inherit the strict mode from the parent scope. |
168 strict_mode_ = outer_scope != NULL ? outer_scope->strict_mode_ : SLOPPY; | 169 strict_mode_ = outer_scope != NULL ? outer_scope->strict_mode_ : SLOPPY; |
169 outer_scope_calls_sloppy_eval_ = false; | 170 outer_scope_calls_sloppy_eval_ = false; |
170 inner_scope_calls_eval_ = false; | 171 inner_scope_calls_eval_ = false; |
| 172 inner_scope_uses_arguments_ = false; |
171 inner_scope_uses_this_ = false; | 173 inner_scope_uses_this_ = false; |
172 inner_scope_uses_arguments_ = false; | 174 inner_scope_uses_super_ = false; |
173 force_eager_compilation_ = false; | 175 force_eager_compilation_ = false; |
174 force_context_allocation_ = (outer_scope != NULL && !is_function_scope()) | 176 force_context_allocation_ = (outer_scope != NULL && !is_function_scope()) |
175 ? outer_scope->has_forced_context_allocation() : false; | 177 ? outer_scope->has_forced_context_allocation() : false; |
176 num_var_or_const_ = 0; | 178 num_var_or_const_ = 0; |
177 num_stack_slots_ = 0; | 179 num_stack_slots_ = 0; |
178 num_heap_slots_ = 0; | 180 num_heap_slots_ = 0; |
179 num_modules_ = 0; | 181 num_modules_ = 0; |
180 module_var_ = NULL, | 182 module_var_ = NULL, |
181 scope_info_ = scope_info; | 183 scope_info_ = scope_info; |
182 start_position_ = RelocInfo::kNoPosition; | 184 start_position_ = RelocInfo::kNoPosition; |
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882 // Scope info. | 884 // Scope info. |
883 if (HasTrivialOuterContext()) { | 885 if (HasTrivialOuterContext()) { |
884 Indent(n1, "// scope has trivial outer context\n"); | 886 Indent(n1, "// scope has trivial outer context\n"); |
885 } | 887 } |
886 if (strict_mode() == STRICT) { | 888 if (strict_mode() == STRICT) { |
887 Indent(n1, "// strict mode scope\n"); | 889 Indent(n1, "// strict mode scope\n"); |
888 } | 890 } |
889 if (scope_inside_with_) Indent(n1, "// scope inside 'with'\n"); | 891 if (scope_inside_with_) Indent(n1, "// scope inside 'with'\n"); |
890 if (scope_contains_with_) Indent(n1, "// scope contains 'with'\n"); | 892 if (scope_contains_with_) Indent(n1, "// scope contains 'with'\n"); |
891 if (scope_calls_eval_) Indent(n1, "// scope calls 'eval'\n"); | 893 if (scope_calls_eval_) Indent(n1, "// scope calls 'eval'\n"); |
| 894 if (scope_uses_arguments_) Indent(n1, "// scope uses 'arguments'\n"); |
| 895 if (scope_uses_super_) Indent(n1, "// scope uses 'super'\n"); |
892 if (scope_uses_this_) Indent(n1, "// scope uses 'this'\n"); | 896 if (scope_uses_this_) Indent(n1, "// scope uses 'this'\n"); |
893 if (scope_uses_arguments_) Indent(n1, "// scope uses 'arguments'\n"); | |
894 if (inner_scope_uses_this_) Indent(n1, "// inner scope uses 'this'\n"); | |
895 if (inner_scope_uses_arguments_) { | 897 if (inner_scope_uses_arguments_) { |
896 Indent(n1, "// inner scope uses 'arguments'\n"); | 898 Indent(n1, "// inner scope uses 'arguments'\n"); |
897 } | 899 } |
| 900 if (inner_scope_uses_super_) Indent(n1, "// inner scope uses 'super'\n"); |
| 901 if (inner_scope_uses_this_) Indent(n1, "// inner scope uses 'this'\n"); |
898 if (outer_scope_calls_sloppy_eval_) { | 902 if (outer_scope_calls_sloppy_eval_) { |
899 Indent(n1, "// outer scope calls 'eval' in sloppy context\n"); | 903 Indent(n1, "// outer scope calls 'eval' in sloppy context\n"); |
900 } | 904 } |
901 if (inner_scope_calls_eval_) Indent(n1, "// inner scope calls 'eval'\n"); | 905 if (inner_scope_calls_eval_) Indent(n1, "// inner scope calls 'eval'\n"); |
902 if (num_stack_slots_ > 0) { Indent(n1, "// "); | 906 if (num_stack_slots_ > 0) { Indent(n1, "// "); |
903 PrintF("%d stack slots\n", num_stack_slots_); } | 907 PrintF("%d stack slots\n", num_stack_slots_); } |
904 if (num_heap_slots_ > 0) { Indent(n1, "// "); | 908 if (num_heap_slots_ > 0) { Indent(n1, "// "); |
905 PrintF("%d heap slots\n", num_heap_slots_); } | 909 PrintF("%d heap slots\n", num_heap_slots_); } |
906 | 910 |
907 // Print locals. | 911 // Print locals. |
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1170 | 1174 |
1171 bool calls_sloppy_eval = | 1175 bool calls_sloppy_eval = |
1172 this->calls_sloppy_eval() || outer_scope_calls_sloppy_eval_; | 1176 this->calls_sloppy_eval() || outer_scope_calls_sloppy_eval_; |
1173 for (int i = 0; i < inner_scopes_.length(); i++) { | 1177 for (int i = 0; i < inner_scopes_.length(); i++) { |
1174 Scope* inner = inner_scopes_[i]; | 1178 Scope* inner = inner_scopes_[i]; |
1175 inner->PropagateScopeInfo(calls_sloppy_eval); | 1179 inner->PropagateScopeInfo(calls_sloppy_eval); |
1176 if (inner->scope_calls_eval_ || inner->inner_scope_calls_eval_) { | 1180 if (inner->scope_calls_eval_ || inner->inner_scope_calls_eval_) { |
1177 inner_scope_calls_eval_ = true; | 1181 inner_scope_calls_eval_ = true; |
1178 } | 1182 } |
1179 // If the inner scope is an arrow function, propagate the flags tracking | 1183 // If the inner scope is an arrow function, propagate the flags tracking |
1180 // usage of this/arguments, but do not propagate them out from normal | 1184 // usage of arguments/super/this, but do not propagate them out from normal |
1181 // functions. | 1185 // functions. |
1182 if (!inner->is_function_scope() || inner->is_arrow_scope()) { | 1186 if (!inner->is_function_scope() || inner->is_arrow_scope()) { |
| 1187 if (inner->scope_uses_arguments_ || inner->inner_scope_uses_arguments_) { |
| 1188 inner_scope_uses_arguments_ = true; |
| 1189 } |
| 1190 if (inner->scope_uses_super_ || inner->inner_scope_uses_super_) { |
| 1191 inner_scope_uses_super_ = true; |
| 1192 } |
1183 if (inner->scope_uses_this_ || inner->inner_scope_uses_this_) { | 1193 if (inner->scope_uses_this_ || inner->inner_scope_uses_this_) { |
1184 inner_scope_uses_this_ = true; | 1194 inner_scope_uses_this_ = true; |
1185 } | 1195 } |
1186 if (inner->scope_uses_arguments_ || inner->inner_scope_uses_arguments_) { | |
1187 inner_scope_uses_arguments_ = true; | |
1188 } | |
1189 } | 1196 } |
1190 if (inner->force_eager_compilation_) { | 1197 if (inner->force_eager_compilation_) { |
1191 force_eager_compilation_ = true; | 1198 force_eager_compilation_ = true; |
1192 } | 1199 } |
1193 if (asm_module_ && inner->scope_type() == FUNCTION_SCOPE) { | 1200 if (asm_module_ && inner->scope_type() == FUNCTION_SCOPE) { |
1194 inner->asm_function_ = true; | 1201 inner->asm_function_ = true; |
1195 } | 1202 } |
1196 } | 1203 } |
1197 } | 1204 } |
1198 | 1205 |
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1423 } | 1430 } |
1424 | 1431 |
1425 | 1432 |
1426 int Scope::ContextLocalCount() const { | 1433 int Scope::ContextLocalCount() const { |
1427 if (num_heap_slots() == 0) return 0; | 1434 if (num_heap_slots() == 0) return 0; |
1428 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - | 1435 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - |
1429 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); | 1436 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); |
1430 } | 1437 } |
1431 | 1438 |
1432 } } // namespace v8::internal | 1439 } } // namespace v8::internal |
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