lldb/test/API/lang/cpp/global_variables/TestCPPGlobalVariables.py

"""Test that C++ global variables can be inspected by name and also their mangled name."""


from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil


class GlobalVariablesCppTestCase(TestBase):
    def setUp(self):
        TestBase.setUp(self)
        self.source = lldb.SBFileSpec("main.cpp")

    def test(self):
        self.build()

        (target, _, _, _) = lldbutil.run_to_source_breakpoint(
            self, "// Set break point at this line.", self.source
        )

        # Check that we can access g_file_global_int by its name
        self.expect(
            "target variable g_file_global_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            substrs=["42"],
        )
        self.expect(
            "target variable abc::g_file_global_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            substrs=["42"],
        )
        self.expect(
            "target variable xyz::g_file_global_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            error=True,
            substrs=["can't find global variable"],
        )

        # Check that we can access g_file_global_const_int by its name
        self.expect(
            "target variable g_file_global_const_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            substrs=["1337"],
        )
        self.expect(
            "target variable abc::g_file_global_const_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            substrs=["1337"],
        )
        self.expect(
            "target variable xyz::g_file_global_const_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            error=True,
            substrs=["can't find global variable"],
        )

        # Try accessing a global variable in anonymous namespace.
        self.expect(
            "target variable g_anon_namespace_const_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            substrs=["100"],
        )
        self.expect(
            "target variable abc::g_anon_namespace_const_int",
            VARIABLES_DISPLAYED_CORRECTLY,
            error=True,
            substrs=["can't find global variable"],
        )
        var = target.FindFirstGlobalVariable(
            "abc::(anonymous namespace)::g_anon_namespace_const_int"
        )
        self.assertTrue(var.IsValid())
        self.assertEqual(
            var.GetName(), "abc::(anonymous namespace)::g_anon_namespace_const_int"
        )
        self.assertEqual(var.GetValue(), "100")

    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24764")
    def test_access_by_mangled_name(self):
        self.build()

        (target, _, _, _) = lldbutil.run_to_source_breakpoint(
            self, "// Set break point at this line.", self.source
        )

        # Check that we can access g_file_global_int by its mangled name
        addr = target.EvaluateExpression("&abc::g_file_global_int").GetValueAsUnsigned()
        self.assertNotEqual(addr, 0)
        mangled = lldb.SBAddress(addr, target).GetSymbol().GetMangledName()
        self.assertNotEqual(mangled, None)
        gv = target.FindFirstGlobalVariable(mangled)
        self.assertTrue(gv.IsValid())
        self.assertEqual(gv.GetName(), "abc::g_file_global_int")
        self.assertEqual(gv.GetValueAsUnsigned(), 42)