[Lldb-commits] [lldb] Fix type lookup bug where wrong decl context was being used for a DIE. (PR #94846)

[via lldb-commits]

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@@ -0,0 +1,69 @@
+"""
+Test the SBModule and SBTarget type lookup APIs to find multiple types.
+"""
+
+import lldb
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TypeFindFirstTestCase(TestBase):
+    def test_find_first_type(self):
+        """
+        Test SBTarget::FindTypes() and SBModule::FindTypes() APIs.
+
+        We had issues where our declaration context when finding types was
+        incorrectly calculated where a type in a namepace, and a type in a
+        function that was also in the same namespace would match a lookup. For
+        example:
+
+            namespace a {
+              struct Foo {
+                int foo;
+              };
+
+              unsigned foo() {
+                typedef unsigned Foo;
+                Foo foo = 12;
+                return foo;
+              }
+            } // namespace a
+
+
+        Previously LLDB would calculate the declaration context of "a::Foo"
+        correctly, but incorrectly calculate the declaration context of "Foo"
+        from within the foo() function as "a::Foo". Adding tests to ensure this
+        works correctly.
+        """
+        self.build()
+        target = self.createTestTarget()
+        exe_module = target.GetModuleAtIndex(0)
+        self.assertTrue(exe_module.IsValid())
+        # Test the SBTarget and SBModule APIs for FindFirstType
+        for api in [target, exe_module]:
+            # We should find the "a::Foo" but not the "Foo" type in the function
+            types = api.FindTypes("a::Foo")
+            self.assertEqual(types.GetSize(), 1)
+            type_str0 = str(types.GetTypeAtIndex(0))
+            self.assertIn('struct Foo', type_str0)
+
+            # When we search by type basename, we should find any type whose
+            # basename matches "Foo", so "a::Foo" and the "Foo" type in the
+            # function.
+            types = api.FindTypes("Foo")
+            self.assertEqual(types.GetSize(), 2)
+            type_str0 = str(types.GetTypeAtIndex(0))
+            type_str1 = str(types.GetTypeAtIndex(1))
+            # We don't know which order the types will come back as, so
+            if 'struct Foo' in type_str0:
+                self.assertIn('typedef Foo', type_str1)
+            else:
+                self.assertIn('struct Foo', type_str1)
+
+            # When we search by type basename with "::" prepended, we should
+            # only types in the root namespace which means only "Foo" type in
----------------
kusmour wrote:

```suggestion
            # When we search by type basename with "::" prepended, we should
            # return only types in the root namespace which means only "Foo" type in
```

https://github.com/llvm/llvm-project/pull/94846