1
2import lldb
3from lldbsuite.test.decorators import *
4from lldbsuite.test.lldbtest import *
5from lldbsuite.test import lldbutil
6
7class ValueAPIEmptyClassTestCase(TestBase):
8
9    mydir = TestBase.compute_mydir(__file__)
10
11    def test(self):
12        self.build()
13        exe = self.getBuildArtifact("a.out")
14        line = line_number('main.cpp', '// Break at this line')
15
16        # Create a target by the debugger.
17        target = self.dbg.CreateTarget(exe)
18        self.assertTrue(target, VALID_TARGET)
19
20        # Create the breakpoint inside function 'main'.
21        breakpoint = target.BreakpointCreateByLocation('main.cpp', line)
22        self.assertTrue(breakpoint, VALID_BREAKPOINT)
23
24        # Now launch the process, and do not stop at entry point.
25        process = target.LaunchSimple(
26            None, None, self.get_process_working_directory())
27        self.assertTrue(process, PROCESS_IS_VALID)
28
29        # Get Frame #0.
30        self.assertEquals(process.GetState(), lldb.eStateStopped)
31        thread = lldbutil.get_stopped_thread(
32            process, lldb.eStopReasonBreakpoint)
33        self.assertTrue(
34            thread.IsValid(),
35            "There should be a thread stopped due to breakpoint condition")
36        frame0 = thread.GetFrameAtIndex(0)
37
38        # Verify that we can access to a frame variable with an empty class type
39        e = frame0.FindVariable('e')
40        self.assertTrue(e.IsValid(), VALID_VARIABLE)
41        self.DebugSBValue(e)
42        self.assertEqual(e.GetNumChildren(), 0)
43
44        # Verify that we can acces to a frame variable what is a pointer to an
45        # empty class
46        ep = frame0.FindVariable('ep')
47        self.assertTrue(ep.IsValid(), VALID_VARIABLE)
48        self.DebugSBValue(ep)
49
50        # Verify that we can dereference a pointer to an empty class
51        epd = ep.Dereference()
52        self.assertTrue(epd.IsValid(), VALID_VARIABLE)
53        self.DebugSBValue(epd)
54        self.assertEqual(epd.GetNumChildren(), 0)
55
56