Debugger: Add simple QV4::String dumper

Change-Id: Ide277128d30c4dcc5c396441ebd6e40aa3fc8b51
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

share/qtcreator/debugger/dumper.py

@@ -360,6 +360,9 @@ class DumperBase:
     def is32bit(self):
         return self.ptrSize() == 4
 
+    def is64bit(self):
+        return self.ptrSize() == 8
+
     def isQt3Support(self):
         # assume no Qt 3 support by default
         return False

share/qtcreator/debugger/gdbbridge.py

@@ -664,6 +664,14 @@ class Dumper(DumperBase):
                 index -= 1;
         return None
 
+    def directBaseObject(self, value, index = 0):
+        for f in value.type.fields():
+            if f.is_base_class:
+                if index == 0:
+                    return value.cast(f.type)
+                index -= 1;
+        return None
+
     def checkPointer(self, p, align = 1):
         if not self.isNull(p):
             p.dereference()

share/qtcreator/debugger/qttypes.py

@@ -2228,6 +2228,40 @@ def qdump__QxXmlAttributes(d, value):
     pass
 
 
+#######################################################################
+#
+# V4
+#
+#######################################################################
+
+def qdump__QV4__String(d, value):
+    d.putStringValue(value["identifier"]["string"])
+    d.putNumChild(0)
+
+def qdump__QV4__TypedValue(d, value):
+    qdump__QV4__Value(d, d.directBaseObject(value))
+    d.putBetterType(value.type)
+
+def qdump__QV4__Value(d, value):
+    try:
+        if d.is64bit():
+            vtable = value["m"]["internalClass"]["vtable"]
+            if toInteger(vtable["isString"]):
+                d.putBetterType(d.qtNamespace() + "QV4::Value (String)")
+                d.putStringValue(value["s"]["identifier"]["string"])
+                d.putNumChild(0)
+                return
+    except:
+        pass
+
+    # Fall back for cases that we do not handle specifically.
+    d.putEmptyValue()
+    d.putNumChild(1)
+    if d.isExpanded():
+        with Children(d):
+            d.putFields(value)
+
+
 #######################################################################
 #
 # Webkit