Add support for sythetic operator dereference

Summary:
After this change a sythetic child provider can generate a special child
named "$$dereference$$" what if present is used when "operator*" or
"operator->" used on a ValueObject. The goal of the change is to make
expressions like "up->foo" work inside the "frame variable" command.

Reviewers: labath, jingham

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D31368

llvm-svn: 299251

1 files changed, 6 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/unique_ptr/TestDataFormatterStdUniquePtr.py b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/unique_ptr/TestDataFormatterStdUniquePtr.py
index eca690f94d8..37adb28d7d5 100644
--- a/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/unique_ptr/TestDataFormatterStdUniquePtr.py
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/data-formatter/data-formatter-stl/libstdcpp/unique_ptr/TestDataFormatterStdUniquePtr.py
@@ -42,13 +42,17 @@ class StdUniquePtrDataFormatterTestCase(TestBase):
         self.expect("frame variable sdp", substrs=['sdp = 0x', 'deleter = ', 'a = 3', 'b = 4'])
 
         self.assertEqual(123, frame.GetValueForVariablePath("iup.object").GetValueAsUnsigned())
+        self.assertEqual(123, frame.GetValueForVariablePath("*iup").GetValueAsUnsigned())
         self.assertFalse(frame.GetValueForVariablePath("iup.deleter").IsValid())
 
         self.assertEqual('"foobar"', frame.GetValueForVariablePath("sup.object").GetSummary())
+        self.assertEqual('"foobar"', frame.GetValueForVariablePath("*sup").GetSummary())
         self.assertFalse(frame.GetValueForVariablePath("sup.deleter").IsValid())
 
         self.assertEqual(456, frame.GetValueForVariablePath("idp.object").GetValueAsUnsigned())
+        self.assertEqual(456, frame.GetValueForVariablePath("*idp").GetValueAsUnsigned())
         self.assertEqual('"baz"', frame.GetValueForVariablePath("sdp.object").GetSummary())
+        self.assertEqual('"baz"', frame.GetValueForVariablePath("*sdp").GetSummary())
 
         idp_deleter = frame.GetValueForVariablePath("idp.deleter")
         self.assertTrue(idp_deleter.IsValid())
@@ -86,5 +90,7 @@ class StdUniquePtrDataFormatterTestCase(TestBase):
         frame = self.frame()
         self.assertTrue(frame.IsValid())
         self.assertEqual(2, frame.GetValueForVariablePath("f1->fp.object.data").GetValueAsUnsigned())
+        self.assertEqual(2, frame.GetValueForVariablePath("f1->fp->data").GetValueAsUnsigned())
         self.assertEqual(1, frame.GetValueForVariablePath("f1->fp.object.fp.object.data").GetValueAsUnsigned())
+        self.assertEqual(1, frame.GetValueForVariablePath("f1->fp->fp->data").GetValueAsUnsigned())