[Debugger] Add dumpers for Python "PyObject"s

The dumper calls PyObject_Repr and shows the result of that as the
value of a PyObject.

It also adds three new sub fields to show the object class (type),
super class (base class), and the meta type (the type of the class
object).

Change-Id: I0612833321f6d2b50826588e775cfa12e1db28e4
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: hjk <hjk@qt.io>

1 files changed, 15 insertions, 0 deletions

diff --git a/share/qtcreator/debugger/dumper.py b/share/qtcreator/debugger/dumper.py
index 11c6b314f0..b48cf0b591 100644
--- a/share/qtcreator/debugger/dumper.py
+++ b/share/qtcreator/debugger/dumper.py
@@ -337,6 +337,10 @@ class DumperBase:
         #warn('EXPANDED INAMES: %s' % self.expandedINames)
         #warn('WATCHERS: %s' % self.watchers)
 
+    def resetPerStepCaches(self):
+        self.perStepCache = {}
+        pass
+
     def resetCaches(self):
         # This is a cache mapping from 'type name' to 'display alternatives'.
         self.qqFormats = { 'QVariant (QVariantMap)' : mapForms() }
@@ -355,6 +359,14 @@ class DumperBase:
         # to not be QObject derived, it contains a 0 value.
         self.knownStaticMetaObjects = {}
 
+        # A dictionary to serve as a per debugging step cache.
+        # Cleared on each step over / into / continue.
+        self.perStepCache = {}
+
+        # A dictionary to serve as a general cache throughout the whole
+        # debug session.
+        self.generalCache = {}
+
         self.counts = {}
         self.structPatternCache = {}
         self.pretimings = {}
@@ -3670,6 +3682,9 @@ class DumperBase:
             error('wrong')
         return bytes(struct.pack(self.packCode + self.ptrCode(), address))
 
+    def fromPointerData(self, bytes_value):
+        return struct.unpack(self.packCode + self.ptrCode(), bytes_value)
+
     def createPointerValue(self, targetAddress, targetTypish):
         if not isinstance(targetTypish, self.Type) and not isinstance(targetTypish, str):
             error('Expected type in createPointerValue(), got %s'