xref: /llvm-project/lldb/test/API/lang/c/forward/TestForwardDeclaration.py (revision 2238dcc39358353cac21df75c3c3286ab20b8f53)

"""Test that forward declaration of a data structure gets resolved correctly."""


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


class ForwardDeclarationTestCase(TestBase):
    def do_test(self, dictionary=None):
        """Display *bar_ptr when stopped on a function with forward declaration of struct bar."""
        self.build(dictionary=dictionary)
        exe = self.getBuildArtifact("a.out")
        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)

        # Break inside the foo function which takes a bar_ptr argument.
        lldbutil.run_break_set_by_symbol(
            self, "foo", num_expected_locations=1, sym_exact=True
        )

        self.runCmd("run", RUN_SUCCEEDED)

        # The stop reason of the thread should be breakpoint.
        self.expect(
            "thread list",
            STOPPED_DUE_TO_BREAKPOINT,
            substrs=["stopped", "stop reason = breakpoint"],
        )

        # The breakpoint should have a hit count of 1.
        lldbutil.check_breakpoint(self, bpno=1, expected_hit_count=1)

        # This should display correctly.
        # Note that the member fields of a = 1 and b = 2 is by design.
        self.expect(
            "frame variable --show-types *bar_ptr",
            VARIABLES_DISPLAYED_CORRECTLY,
            substrs=["(bar) *bar_ptr = ", "(int) a = 1", "(int) b = 2"],
        )

        # And so should this.
        self.expect(
            "expression --show-types -- *bar_ptr",
            VARIABLES_DISPLAYED_CORRECTLY,
            substrs=["(bar)", "(int) a = 1", "(int) b = 2"],
        )

    def test(self):
        self.do_test()

    @no_debug_info_test
    @skipIfDarwin
    @skipIf(compiler=no_match("clang"))
    @skipIf(compiler_version=["<", "8.0"])
    @expectedFailureAll(oslist=["windows"])
    def test_debug_names(self):
        """Test that we are able to find complete types when using DWARF v5
        accelerator tables"""
        self.do_test(dict(CFLAGS_EXTRAS="-gdwarf-5 -gpubnames"))