Support merged Dart-JS callstacks

Source/bindings/common/StackTrace.h

 /*
  * Copyright (C) 2014 Google Inc. 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
@@ skipping 14 matching lines @@
  * 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.
  */
 
 #ifndef StackTrace_h
 #define StackTrace_h
 
 #include "bindings/common/ScriptValue.h"
+#include "wtf/HashMap.h"
+
 #include <dart_debugger_api.h>
 
 namespace WebCore {
 
 class JSONValue;
 class ScriptState;
 class V8ScriptState;
 
 class StackTrace {
 public:
@@ skipping 37 matching lines @@
     {
         return m_isJavaScript ? m_scriptValue.isEmpty() : !m_dartStackTrace;
     }
 
 private:
     bool m_isJavaScript;
     ScriptValue m_scriptValue;
     Dart_StackTrace m_dartStackTrace;
 };
 
+class StackTraces {
+public:
+    typedef HashMap<ScriptState*, StackTrace> StackTraceMap;
+    typedef StackTraceMap::iterator iterator;
+    typedef StackTraceMap::const_iterator const_iterator;
+
+    StackTraces() { }
+    StackTraces(StackTrace, ScriptState*);
+
+    StackTrace lookup(ScriptState*) const;
+    void add(const StackTrace&, ScriptState*);
+    void add(const StackTraces&);
+
+    bool isNull() const { return m_traces.isEmpty(); }
+
+    iterator begin() { return m_traces.begin(); }
+    iterator end() { return m_traces.end(); }
+    const_iterator begin() const { return m_traces.begin(); }
+    const_iterator end() const { return m_traces.end(); }
+private:
+
+    StackTraceMap m_traces;
+};
+
 class ActivationFrame {
 public:
     explicit ActivationFrame()
     {
         m_isJavaScript = true;
         m_dartActivationFrame = 0;
     }
 
     explicit ActivationFrame(const ScriptValue& activationFrame)
     {
         m_isJavaScript = true;
         m_scriptValue = activationFrame;
         m_dartActivationFrame = 0;
     }
 
     explicit ActivationFrame(Dart_ActivationFrame activationFrame)
     {
         m_isJavaScript = false;
         m_dartActivationFrame = activationFrame;
     }
 
     bool isJavaScript() const { return m_isJavaScript; }
+
     ScriptValue asJavaScript() const
     {
         ASSERT(m_isJavaScript);
         return m_scriptValue;
     }
 
     Dart_ActivationFrame asDart() const
     {
         ASSERT(!m_isJavaScript);
         return m_dartActivationFrame;
     }
 
 private:
     bool m_isJavaScript;
     ScriptValue m_scriptValue;
     Dart_ActivationFrame m_dartActivationFrame;
 };
 
 } // namespace WebCore
 
 #endif // StackTrace_h