Add fuzz calls to SBType, SBValue, and SBValueList.

Fixed crashes for SBValue fuzz calls.
And change 'bool SBType::IsPointerType(void)' to
'bool SBType::IsAPointerType(void)' to avoid name collision with the static 'bool SBType::IsPointerType(void *)'
function, which SWIG cannot handle.

llvm-svn: 134096

lldb/include/lldb/API/SBType.h

@@ -53,7 +53,7 @@ public:
     GetChildIndexForName (bool omit_empty_base_classes, const char *name);
 
     bool
-    IsPointerType ();
+    IsAPointerType ();
 
     SBType
     GetPointeeType ();

lldb/source/API/SBType.cpp

@@ -165,7 +165,7 @@ SBType::GetChildIndexForName (bool omit_empty_base_classes, const char *name)
 }
 
 bool
-SBType::IsPointerType ()
+SBType::IsAPointerType ()
 {
     return ClangASTContext::IsPointerType (m_type);
 }
@@ -174,7 +174,7 @@ SBType
 SBType::GetPointeeType ()
 {
     void *pointee_type = NULL;
-    if (IsPointerType ())
+    if (IsAPointerType ())
     {
         pointee_type = ClangASTType::GetPointeeType (m_type);
     }
@@ -187,7 +187,7 @@ SBType::GetDescription (SBStream &description)
     const char *name = GetName();
     uint64_t byte_size = GetByteSize();
     uint64_t num_children = GetNumberChildren (true);
-    bool is_ptr = IsPointerType ();
+    bool is_ptr = IsAPointerType ();
 
     description.Printf ("type_name: %s, size: %d bytes", (name != NULL ? name : "<unknown type name>"), byte_size);
     if (is_ptr)

lldb/source/API/SBValue.cpp

@@ -353,8 +353,13 @@ SBValue::SetValueFromCString (const char *value_str)
 SBValue
 SBValue::GetChildAtIndex (uint32_t idx)
 {
-    lldb::DynamicValueType use_dynamic_value = m_opaque_sp->GetUpdatePoint().GetTarget()->GetPreferDynamicValue();
-    return GetChildAtIndex (idx, use_dynamic_value);
+    if (m_opaque_sp)
+    {
+        lldb::DynamicValueType use_dynamic_value = m_opaque_sp->GetUpdatePoint().GetTarget()->GetPreferDynamicValue();
+        return GetChildAtIndex (idx, use_dynamic_value);
+    }
+    else
+        return GetChildAtIndex (idx, eNoDynamicValues);
 }
 
 SBValue
@@ -416,8 +421,13 @@ SBValue::GetIndexOfChildWithName (const char *name)
 SBValue
 SBValue::GetChildMemberWithName (const char *name)
 {
-    lldb::DynamicValueType use_dynamic_value = m_opaque_sp->GetUpdatePoint().GetTarget()->GetPreferDynamicValue();
-    return GetChildMemberWithName (name, use_dynamic_value);
+    if (m_opaque_sp)
+    {
+        lldb::DynamicValueType use_dynamic_value = m_opaque_sp->GetUpdatePoint().GetTarget()->GetPreferDynamicValue();
+        return GetChildMemberWithName (name, use_dynamic_value);
+    }
+    else
+        return GetChildMemberWithName (name, eNoDynamicValues);
 }
 
 SBValue

lldb/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py

@@ -297,6 +297,9 @@ class APIDefaultConstructorTestCase(TestBase):
         if self.TraceOn():
             print obj
         self.assertFalse(obj)
+        # Do fuzz testing on the invalid obj, it should not crash lldb.
+        import sb_type
+        sb_type.fuzz_obj(obj)
 
     @python_api_test
     def test_SBValue(self):
@@ -304,6 +307,9 @@ class APIDefaultConstructorTestCase(TestBase):
         if self.TraceOn():
             print obj
         self.assertFalse(obj)
+        # Do fuzz testing on the invalid obj, it should not crash lldb.
+        import sb_value
+        sb_value.fuzz_obj(obj)
 
     @python_api_test
     def test_SBValueList(self):
@@ -311,6 +317,9 @@ class APIDefaultConstructorTestCase(TestBase):
         if self.TraceOn():
             print obj
         self.assertFalse(obj)
+        # Do fuzz testing on the invalid obj, it should not crash lldb.
+        import sb_valuelist
+        sb_valuelist.fuzz_obj(obj)
 
 
 if __name__ == '__main__':

lldb/test/python_api/default-constructor/sb_type.py

@@ -0,0 +1,19 @@
+"""
+Fuzz tests an object after the default construction to make sure it does not crash lldb.
+"""
+
+import sys
+import lldb
+
+def fuzz_obj(obj):
+    obj.GetName()
+    obj.GetByteSize()
+    #obj.GetEncoding(5)
+    obj.GetNumberChildren(True)
+    member = lldb.SBTypeMember()
+    obj.GetChildAtIndex(True, 0, member)
+    obj.GetChildIndexForName(True, "_member_field")
+    obj.IsAPointerType()
+    obj.GetPointeeType()
+    obj.GetDescription(lldb.SBStream())
+

lldb/test/python_api/default-constructor/sb_value.py

@@ -0,0 +1,35 @@
+"""
+Fuzz tests an object after the default construction to make sure it does not crash lldb.
+"""
+
+import sys
+import lldb
+
+def fuzz_obj(obj):
+    obj.GetError()
+    obj.GetName()
+    obj.GetTypeName()
+    obj.GetByteSize()
+    obj.IsInScope()
+    obj.GetFormat()
+    obj.SetFormat(lldb.eFormatBoolean)
+    obj.GetValue()
+    obj.GetValueType()
+    obj.GetValueDidChange()
+    obj.GetSummary()
+    obj.GetObjectDescription()
+    obj.GetLocation()
+    obj.SetValueFromCString("my_new_value")
+    obj.GetChildAtIndex(1)
+    obj.GetChildAtIndex(2, lldb.eNoDynamicValues)
+    obj.GetIndexOfChildWithName("my_first_child")
+    obj.GetChildMemberWithName("my_first_child")
+    obj.GetChildMemberWithName("my_first_child", lldb.eNoDynamicValues)
+    obj.GetNumChildren()
+    obj.GetOpaqueType()
+    obj.Dereference()
+    obj.TypeIsPointerType()
+    stream = lldb.SBStream()
+    obj.GetDescription(stream)
+    obj.GetExpressionPath(stream)
+    obj.GetExpressionPath(stream, True)

lldb/test/python_api/default-constructor/sb_valuelist.py

@@ -0,0 +1,12 @@
+"""
+Fuzz tests an object after the default construction to make sure it does not crash lldb.
+"""
+
+import sys
+import lldb
+
+def fuzz_obj(obj):
+    obj.Append(lldb.SBValue())
+    obj.GetSize()
+    obj.GetValueAtIndex(100)
+    obj.FindValueObjectByUID(200)