Debugger: Fix std::complex dumper for LLDB

Change-Id: I5ffb0f60039bb05f8467e925e71cf710a0712791
Reviewed-by: hjk <hjk121@nokiamail.com>

share/qtcreator/debugger/gdbbridge.py

@@ -1215,7 +1215,14 @@ class Dumper(DumperBase):
         return toInteger(value.address)
 
     def createPointerValue(self, address, pointeeType):
-        return gdb.Value(address).cast(pointeeType.pointer())
+        # This might not always work:
+        # a Python 3 based GDB due to the bug addressed in
+        # https://sourceware.org/ml/gdb-patches/2013-09/msg00571.html
+        try:
+            return gdb.Value(address).cast(pointeeType.pointer())
+        except:
+            # Try _some_ fallback (good enough for the std::complex dumper)
+            return gdb.parse_and_eval("(%s*)%s" % (pointeeType, address))
 
     def intSize(self):
         return 4
@@ -1227,7 +1234,11 @@ class Dumper(DumperBase):
         return self.lookupType('void*').sizeof == 4
 
     def createValue(self, address, referencedType):
-        return gdb.Value(address).cast(referencedType.pointer()).dereference()
+        try:
+            return gdb.Value(address).cast(referencedType.pointer()).dereference()
+        except:
+            # Try _some_ fallback (good enough for the std::complex dumper)
+            return gdb.parse_and_eval("{%s}%s" % (referencedType, address))
 
     def readRawMemory(self, addr, size):
         mem = gdb.selected_inferior().read_memory(addr, size)

share/qtcreator/debugger/stdtypes.py

@@ -79,9 +79,8 @@ def qdump__std____1__array(d, value):
 
 def qdump__std__complex(d, value):
     innerType = d.templateArgument(value.type, 0)
-    base = value.address.cast(innerType.pointer())
-    real = base.dereference()
-    imag = (base + 1).dereference()
+    real = value.cast(innerType)
+    imag = d.createValue(d.addressOf(value) + innerType.sizeof, innerType)
     d.putValue("(%f, %f)" % (real, imag));
     d.putNumChild(2)
     if d.isExpanded():

tests/auto/debugger/tst_dumpers.cpp

@@ -2469,8 +2469,10 @@ void tst_Dumpers::dumper_data()
 
     QTest::newRow("StdComplex")
             << Data("#include <complex>\n",
-                    "std::complex<double> c(1, 2);\n")
-               % Check("c", "(1.000000, 2.000000)", "std::complex<double>");
+                    "std::complex<double> c(1, 2);\n"
+                    "unused(&c);\n")
+               % Check("c", "(1.000000, 2.000000)", "std::complex<double>")
+               % CheckType("c.real", "double");
 
     QTest::newRow("CComplexGdb")
             << Data("#include <complex.h>\n",