Add more debugging information to scripts compiled through eval

src/d8.js

Index: src/d8.js
===================================================================
--- src/d8.js	(revision 2090)
+++ src/d8.js	(working copy)
@@ -93,6 +93,13 @@
                      Normal: 2 };
 
 
+// The different types of script compilations matching enum
+// Script::CompilationType in objects.h.
+Debug.ScriptCompilationType = { Host: 0,
+                                Eval: 1,
+                                JSON: 2 };
+
+
 // Current debug state.
 const kNoFrame = -1;
 Debug.State = {
@@ -963,7 +970,18 @@
           if (body[i].name) {
             result += body[i].name;
           } else {
-            result += '[unnamed] ';
+            if (body[i].compilationType == Debug.ScriptCompilationType.Eval) {
+              result += 'eval from ';
+              var script_value = response.lookup(body[i].evalFromScript.ref);
+              result += ' ' + script_value.field('name');
+              result += ':' + (body[i].evalFromLocation.line + 1);
+              result += ':' + body[i].evalFromLocation.column;
+            } else if (body[i].compilationType ==
+                       Debug.ScriptCompilationType.JSON) {
+              result += 'JSON ';
+            } else {  // body[i].compilation == Debug.ScriptCompilationType.Host
+              result += '[unnamed] ';
+            }
           }
           result += ' (lines: ';
           result += body[i].lineCount;
@@ -1126,6 +1144,15 @@
 
 
 /**
+ * Get a metadata field from a protocol value. 
+ * @return {Object} the metadata field value
+ */
+ProtocolValue.prototype.field = function(name) {
+  return this.value_[name];
+}
+
+
+/**
  * Check is the value is a primitive value.
  * @return {boolean} true if the value is primitive
  */