lldb/test/API/functionalities/var_path/TestVarPath.py

"""
Make sure the getting a variable path works and doesn't crash.
"""



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


class TestVarPath(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    # If your test case doesn't stress debug info, the
    # set this to true.  That way it won't be run once for
    # each debug info format.
    NO_DEBUG_INFO_TESTCASE = True

    def test_frame_var(self):
        self.build()
        self.do_test()

    def verify_point(self, frame, var_name, var_typename, x_value, y_value):
        v = frame.GetValueForVariablePath(var_name)
        self.assertTrue(v.GetError().Success(), "Make sure we find '%s'" % (var_name))
        self.assertEquals(v.GetType().GetName(), var_typename,
                        "Make sure '%s' has type '%s'" % (var_name, var_typename))

        if '*' in var_typename:
            valid_prefix = var_name + '->'
            invalid_prefix = var_name + '.'
        else:
            valid_prefix = var_name + '.'
            invalid_prefix = var_name + '->'

        valid_x_path = valid_prefix + 'x'
        valid_y_path = valid_prefix + 'y'
        invalid_x_path = invalid_prefix + 'x'
        invalid_y_path = invalid_prefix + 'y'
        invalid_m_path = invalid_prefix + 'm'

        v = frame.GetValueForVariablePath(valid_x_path)
        self.assertTrue(v.GetError().Success(), "Make sure we find '%s'" % (valid_x_path))
        self.assertEquals(v.GetValue(), str(x_value), "Make sure '%s' has a value of %i" % (valid_x_path, x_value))
        self.assertEquals(v.GetType().GetName(), "int", "Make sure '%s' has type 'int'" % (valid_x_path))
        v = frame.GetValueForVariablePath(invalid_x_path)
        self.assertTrue(v.GetError().Fail(), "Make sure we don't find '%s'" % (invalid_x_path))

        v = frame.GetValueForVariablePath(valid_y_path)
        self.assertTrue(v.GetError().Success(), "Make sure we find '%s'" % (valid_y_path))
        self.assertEquals(v.GetValue(), str(y_value), "Make sure '%s' has a value of %i" % (valid_y_path, y_value))
        self.assertEquals(v.GetType().GetName(), "int", "Make sure '%s' has type 'int'" % (valid_y_path))
        v = frame.GetValueForVariablePath(invalid_y_path)
        self.assertTrue(v.GetError().Fail(), "Make sure we don't find '%s'" % (invalid_y_path))

        v = frame.GetValueForVariablePath(invalid_m_path)
        self.assertTrue(v.GetError().Fail(), "Make sure we don't find '%s'" % (invalid_m_path))

    def do_test(self):
        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
            self, "// Set a breakpoint here", lldb.SBFileSpec("main.cpp"))

        frame = thread.GetFrameAtIndex(0)
        v = frame.GetValueForVariablePath('no_such_variable')
        self.assertTrue(v.GetError().Fail(), "Make sure we don't find 'no_such_variable'")

        # Test an instance
        self.verify_point(frame, 'pt', 'Point', 1, 2)
        # Test a pointer
        self.verify_point(frame, 'pt_ptr', 'Point *', 3030, 4040)
        # Test using a pointer as an array
        self.verify_point(frame, 'pt_ptr[-1]', 'Point', 1010, 2020)
        self.verify_point(frame, 'pt_ptr[0]', 'Point', 3030, 4040)
        self.verify_point(frame, 'pt_ptr[1]', 'Point', 5050, 6060)
        # Test arrays
        v = frame.GetValueForVariablePath('points')
        self.assertTrue(v.GetError().Success(),
                        "Make sure we find 'points'")
        self.verify_point(frame, 'points[0]', 'Point', 1010, 2020)
        self.verify_point(frame, 'points[1]', 'Point', 3030, 4040)
        self.verify_point(frame, 'points[2]', 'Point', 5050, 6060)
        v = frame.GetValueForVariablePath('points[0]+5')
        self.assertTrue(v.GetError().Fail(),
                        "Make sure we do not ignore characters between ']' and the end")
        # Test a reference
        self.verify_point(frame, 'pt_ref', 'Point &', 1, 2)
        v = frame.GetValueForVariablePath('pt_sp')
        self.assertTrue(v.GetError().Success(), "Make sure we find 'pt_sp'")
        # Make sure we don't crash when looking for non existant child
        # in type with synthetic children. This used to cause a crash.
        v = frame.GetValueForVariablePath('pt_sp->not_valid_child')
        self.assertTrue(v.GetError().Fail(),
                        "Make sure we don't find 'pt_sp->not_valid_child'")