| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "v8.h" |
| |
| #include "ast.h" |
| #include "func-name-inferrer.h" |
| #include "list-inl.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| FuncNameInferrer::FuncNameInferrer(Isolate* isolate, Zone* zone) |
| : isolate_(isolate), |
| entries_stack_(10, zone), |
| names_stack_(5, zone), |
| funcs_to_infer_(4, zone), |
| zone_(zone) { |
| } |
| |
| |
| void FuncNameInferrer::PushEnclosingName(Handle<String> name) { |
| // Enclosing name is a name of a constructor function. To check |
| // that it is really a constructor, we check that it is not empty |
| // and starts with a capital letter. |
| if (name->length() > 0 && Runtime::IsUpperCaseChar( |
| isolate()->runtime_state(), name->Get(0))) { |
| names_stack_.Add(Name(name, kEnclosingConstructorName), zone()); |
| } |
| } |
| |
| |
| void FuncNameInferrer::PushLiteralName(Handle<String> name) { |
| if (IsOpen() && !isolate()->heap()->prototype_string()->Equals(*name)) { |
| names_stack_.Add(Name(name, kLiteralName), zone()); |
| } |
| } |
| |
| |
| void FuncNameInferrer::PushVariableName(Handle<String> name) { |
| if (IsOpen() && !isolate()->heap()->dot_result_string()->Equals(*name)) { |
| names_stack_.Add(Name(name, kVariableName), zone()); |
| } |
| } |
| |
| |
| Handle<String> FuncNameInferrer::MakeNameFromStack() { |
| return MakeNameFromStackHelper(0, isolate()->factory()->empty_string()); |
| } |
| |
| |
| Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos, |
| Handle<String> prev) { |
| if (pos >= names_stack_.length()) return prev; |
| if (pos < names_stack_.length() - 1 && |
| names_stack_.at(pos).type == kVariableName && |
| names_stack_.at(pos + 1).type == kVariableName) { |
| // Skip consecutive variable declarations. |
| return MakeNameFromStackHelper(pos + 1, prev); |
| } else { |
| if (prev->length() > 0) { |
| Handle<String> name = names_stack_.at(pos).name; |
| if (prev->length() + name->length() + 1 > String::kMaxLength) return prev; |
| Factory* factory = isolate()->factory(); |
| Handle<String> curr = |
| factory->NewConsString(factory->dot_string(), name).ToHandleChecked(); |
| curr = factory->NewConsString(prev, curr).ToHandleChecked(); |
| return MakeNameFromStackHelper(pos + 1, curr); |
| } else { |
| return MakeNameFromStackHelper(pos + 1, names_stack_.at(pos).name); |
| } |
| } |
| } |
| |
| |
| void FuncNameInferrer::InferFunctionsNames() { |
| Handle<String> func_name = MakeNameFromStack(); |
| for (int i = 0; i < funcs_to_infer_.length(); ++i) { |
| funcs_to_infer_[i]->set_inferred_name(func_name); |
| } |
| funcs_to_infer_.Rewind(0); |
| } |
| |
| |
| } } // namespace v8::internal |