Make sure LLDB can deal with forward declarations to enums without crashing or asserting.

<rdar://problem/23776428> 

llvm-svn: 268098

2 files changed, 19 insertions, 1 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/TestEnumTypes.py b/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/TestEnumTypes.py
index b0c5c882f6a..3e0f7422674 100644
--- a/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/TestEnumTypes.py
+++ b/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/TestEnumTypes.py
@@ -63,7 +63,14 @@ class EnumTypesTestCase(TestBase):
                         'Sunday',
                         'kNumDays',
                         '5'];
-
+                                                                                                                             
+        # Make sure a pointer to an anonymous enum type does crash LLDB and displays correctly using
+        # frame variable and expression commands
+        self.expect('frame variable f.op', DATA_TYPES_DISPLAYED_CORRECTLY, substrs = ['ops *', 'f.op', '0x0000000000000000'])
+        self.expect('frame variable *f.op', DATA_TYPES_DISPLAYED_CORRECTLY, substrs = ['ops', '*f.op', '<parent is NULL>'])
+        self.expect('expr f.op', DATA_TYPES_DISPLAYED_CORRECTLY, substrs = ['ops *', '$', '0x0000000000000000'])
+        self.expect('expr *f.op', DATA_TYPES_DISPLAYED_CORRECTLY, substrs = ['error:'], error = True)
+        
         bkpt = self.target().FindBreakpointByID(bkpt_id)
         for enum_value in enum_values:
             self.expect("frame variable day", 'check for valid enumeration value',
diff --git a/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/main.c b/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/main.c
index 3d59654eff6..be0fa57d0b7 100644
--- a/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/main.c
+++ b/lldb/packages/Python/lldbsuite/test/lang/c/enum_types/main.c
@@ -8,6 +8,15 @@
 //===----------------------------------------------------------------------===//
 #include <stdio.h>
 
+#include <stdio.h>
+
+// Forward declare an enumeration (only works in C, not C++)
+typedef enum ops ops;
+
+struct foo {
+	ops *op;
+};
+
 int main (int argc, char const *argv[])
 {
     enum days {
@@ -21,6 +30,8 @@ int main (int argc, char const *argv[])
         kNumDays
     };
     enum days day;
+    struct foo f;
+	f.op = NULL;
     for (day = Monday - 1; day <= kNumDays + 1; day++)
     {
         printf("day as int is %i\n", (int)day); // Set break point at this line.