================
@@ -0,0 +1,67 @@
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class LibCxxInternalsRecognizerTestCase(TestBase):
+    NO_DEBUG_INFO_TESTCASE = True
+
+    @add_test_categories(["libc++"])
+    def test_frame_recognizer(self):
+        """Test that implementation details of libc++ are hidden"""
+        self.build()
+        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
+            self, "break here", lldb.SBFileSpec("main.cpp")
+        )
+
+        expected_parents = {
+            "sort_less(int, int)": ["::sort", "test_algorithms"],
+            # `std::ranges::sort` is implemented as an object of types 
`__sort`.
----------------
vogelsgesang wrote:

Not sure that would be necessary. With the current heuristic ("never hide a 
frame which was immediately called from user code"), the end result to the user 
is fine, despite the debug info containing the `__sort::operator()` function 
name

https://github.com/llvm/llvm-project/pull/108870
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