[lldb] Add SBFunction::GetBaseName() & SBSymbol::GetBaseName() (#155939)

When you are trying for instance to set a breakpoint on a function by
name, but the SBFunction or SBSymbol are returning demangled names with
argument lists, that match can be tedious to do. Internally, the base
name of a symbol is something we handle all the time, so it's reasonable
that there should be a way to get that info from the API as well.

rdar://159318791

3 files changed, 55 insertions, 0 deletions

diff --git a/lldb/test/API/python_api/basename/Makefile b/lldb/test/API/python_api/basename/Makefile
new file mode 100644
index 0000000..99998b2
--- /dev/null
+++ b/lldb/test/API/python_api/basename/Makefile
@@ -0,0 +1,3 @@
+CXX_SOURCES := main.cpp
+
+include Makefile.rules
diff --git a/lldb/test/API/python_api/basename/TestGetBaseName.py b/lldb/test/API/python_api/basename/TestGetBaseName.py
new file mode 100644
index 0000000..bd91acd
--- /dev/null
+++ b/lldb/test/API/python_api/basename/TestGetBaseName.py
@@ -0,0 +1,36 @@
+"""
+Test SBFunction::GetBaseName() and SBSymbol::GetBaseName() APIs.
+"""
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class GetBaseNameTestCase(TestBase):
+    NO_DEBUG_INFO_TESTCASE = True
+
+    def setUp(self):
+        TestBase.setUp(self)
+        self.main_source_file = lldb.SBFileSpec("main.cpp")
+
+    def test(self):
+        """Test SBFunction.GetBaseName() and SBSymbol.GetBaseName()"""
+        self.build()
+        _, _, thread, _ = lldbutil.run_to_source_breakpoint(
+            self, "Set a breakpoint here", self.main_source_file
+        )
+
+        frame0 = thread.GetFrameAtIndex(0)
+
+        # Get both function and symbol
+        function = frame0.GetFunction()
+        symbol = frame0.GetSymbol()
+
+        # Test consistency between function and symbol basename
+        function_basename = function.GetBaseName()
+        symbol_basename = symbol.GetBaseName()
+
+        self.assertEqual(function_basename, "templateFunc")
+        self.assertEqual(symbol_basename, "templateFunc")
diff --git a/lldb/test/API/python_api/basename/main.cpp b/lldb/test/API/python_api/basename/main.cpp
new file mode 100644
index 0000000..9b41409
--- /dev/null
+++ b/lldb/test/API/python_api/basename/main.cpp
@@ -0,0 +1,16 @@
+#include <iostream>
+
+namespace ns {
+template <typename T> class MyClass {
+public:
+  void templateFunc() {
+    std::cout << "In templateFunc" << std::endl; // Set a breakpoint here
+  }
+};
+} // namespace ns
+
+int main() {
+  ns::MyClass<int> obj;
+  obj.templateFunc();
+  return 0;
+}