Dumpers: Fix operator + for pointers

Add an extensive unit test to prevent future regression.

Change-Id: I38b74f9b4f5893285e9afff2ddecaaad106f4114
Reviewed-by: hjk <hjk@qt.io>

share/qtcreator/debugger/dumper.py

@@ -3104,7 +3104,7 @@ class DumperBase:
             if self.dumper.isInt(other):
                 stripped = self.type.stripTypedefs()
                 if stripped.code == TypeCodePointer:
-                    address = self.pointer() + stripped.dereference().size()
+                    address = self.pointer() + stripped.dereference().size() * other
                     val = self.dumper.Value(self.dumper)
                     val.laddress = None
                     val.ldata = bytes(struct.pack(self.dumper.packCode + 'Q', address))

share/qtcreator/debugger/misctypes.py

@@ -349,3 +349,16 @@ def qdump__QtcDumperTest_PointerArray(d, value):
             for i in d.childRange():
                 d.putSubItem(i, foos[i])
 
+def qdump__QtcDumperTest_BufArray(d, value):
+    maxItems = 1000
+    buffer = value['buffer']
+    count = int(value['count'])
+    objsize = int(value['objSize'])
+    valueType = value.type.templateArgument(0)
+    d.putItemCount(count, maxItems)
+    d.putNumChild(count)
+    if d.isExpanded():
+        with Children(d, count, maxNumChild=maxItems, childType=valueType):
+            for i in d.childRange():
+                d.putSubItem(i, (buffer + (i * objsize)).dereference().cast(valueType))
+

tests/auto/debugger/tst_dumpers.cpp

@@ -6748,6 +6748,32 @@ void tst_Dumpers::dumper_data()
             + Check("tc.3.bar", "15", "int");
 
 
+    QTest::newRow("BufArray")
+            << Data("#include <new>\n"
+                    "static int c = 0;\n"
+                    "struct Foo { int bar = c++; int baz = c++; };\n"
+                    "template<class T>\n"
+                    "struct QtcDumperTest_BufArray {\n"
+                    "   const int objSize = int(sizeof(T));\n"
+                    "   const int count = 10;\n"
+                    "   char *buffer;\n"
+                    "   QtcDumperTest_BufArray() {\n"
+                    "      buffer = new char[count * objSize];\n"
+                    "      for (int i = 0; i < count; ++i)\n"
+                    "         new(buffer + i * objSize) T;\n"
+                    "   }\n"
+                    "   ~QtcDumperTest_BufArray() { delete[] buffer; }\n"
+                    "};\n\n",
+                    "QtcDumperTest_BufArray<Foo> arr; unused(&arr);\n")
+               + Cxx11Profile()
+               + Check("arr.0.bar", "0", "int")
+               + Check("arr.0.baz", "1", "int")
+               + Check("arr.1.bar", "2", "int")
+               + Check("arr.1.baz", "3", "int")
+               + Check("arr.2.bar", "4", "int")
+               + Check("arr.2.baz", "5", "int");
+
+
     QTest::newRow("UndefinedStaticMembers")
             << Data("struct Foo { int a = 15; static int b; }; \n",
                     "Foo f; unused(&f);\n")