[interpreter] Implement handling of try-finally constructs.

src/interpreter/control-flow-builders.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/control-flow-builders.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 141 matching lines @@
 
 
 void TryCatchBuilder::EndCatch() { builder()->Bind(&exit_); }
 
 
 void TryFinallyBuilder::BeginTry(Register context) {
   builder()->MarkTryBegin(handler_id_, context);
 }
 
 
+void TryFinallyBuilder::LeaveTry() {
+  finalization_sites_.push_back(BytecodeLabel());
+  builder()->Jump(&finalization_sites_.back());
+}
+
+
 void TryFinallyBuilder::EndTry() {
   builder()->MarkTryEnd(handler_id_);
+}
+
+
+void TryFinallyBuilder::BeginHandler() {
   builder()->Bind(&handler_);
   builder()->MarkHandler(handler_id_, false);
 }
 
 
+void TryFinallyBuilder::BeginFinally() {
+  for (size_t i = 0; i < finalization_sites_.size(); i++) {
+    BytecodeLabel& site = finalization_sites_.at(i);
+    builder()->Bind(&site);
+  }
+}
+
+
 void TryFinallyBuilder::EndFinally() {
   // Nothing to be done here.
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8