Add central bridge for liveedit support

src/liveedit.cc

Index: src/liveedit.cc
diff --git a/src/liveedit.cc b/src/liveedit.cc
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+++ b/src/liveedit.cc
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+// Copyright 2010 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 "liveedit.h"
+#include "compiler.h"
+#include "oprofile-agent.h"
+#include "scopes.h"
+#include "global-handles.h"
+#include "debug.h"
+
+namespace v8 {
+namespace internal {
+
+
+class FunctionInfoListener {
+ public:
+  void FunctionStarted(FunctionLiteral* fun) {
+    // Implementation follows.
+  }
+
+  void FunctionDone() {
+    // Implementation follows.
+  }
+
+  void FunctionScope(Scope* scope){
+    // Implementation follows.
+  }
+
+  void FunctionCode(Handle<Code> function_code) {
+    // Implementation follows.
+  }
+};
+
+static FunctionInfoListener* active_function_info_listener = NULL;
+
+LiveEditFunctionTracker::LiveEditFunctionTracker(FunctionLiteral* fun) {
+  if (active_function_info_listener != NULL) {
+    active_function_info_listener->FunctionStarted(fun);
+  }
+}
+LiveEditFunctionTracker::~LiveEditFunctionTracker() {
+  if (active_function_info_listener != NULL) {
+    active_function_info_listener->FunctionDone();
+  }
+}
+void LiveEditFunctionTracker::RecordFunctionCode(Handle<Code> code) {
+  if (active_function_info_listener != NULL) {
+    active_function_info_listener->FunctionCode(code);
+  }
+}
+void LiveEditFunctionTracker::RecordFunctionScope(Scope* scope) {
+  if (active_function_info_listener != NULL) {
+    active_function_info_listener->FunctionScope(scope);
+  }
+}
+bool LiveEditFunctionTracker::IsActive() {
+  return active_function_info_listener != NULL;
+}
+
+} }  // namespace v8::internal