Example #1
0
    def test(self):
        """Test lldb exception breakpoint command for CPP."""
        self.build()
        exe = self.getBuildArtifact("a.out")

        # Create a target from the debugger.

        target = self.dbg.CreateTarget(exe)
        self.assertTrue(target, VALID_TARGET)

        exception_bkpt = target.BreakpointCreateForException(
            lldb.eLanguageTypeC_plus_plus, True, True)
        self.assertTrue(exception_bkpt, "Made an exception breakpoint")

        # Now run, and make sure we hit our breakpoint:
        process = target.LaunchSimple(
            None, None, self.get_process_working_directory())
        self.assertTrue(process, "Got a valid process")

        stopped_threads = []
        stopped_threads = lldbutil.get_threads_stopped_at_breakpoint(
            process, exception_bkpt)
        self.assertTrue(
            len(stopped_threads) == 1,
            "Stopped at our exception breakpoint.")
        thread = stopped_threads[0]
        # Make sure our throw function is still above us on the stack:

        frame_functions = lldbutil.get_function_names(thread)
        self.assertTrue(
            frame_functions.count("throws_exception_on_even(int)") == 1,
            "Our throw function is still on the stack.")

        # Okay we hit our exception throw breakpoint, now make sure we get our catch breakpoint.
        # One potential complication is that we might hit a couple of the exception breakpoints in getting out of the throw.
        # so loop till we don't see the throws function on the stack.  We should stop one more time for our exception breakpoint
        # and that should be the catch...

        while frame_functions.count("throws_exception_on_even(int)") == 1:
            stopped_threads = lldbutil.continue_to_breakpoint(
                process, exception_bkpt)
            self.assertTrue(len(stopped_threads) == 1)

            thread = stopped_threads[0]
            frame_functions = lldbutil.get_function_names(thread)

        self.assertTrue(
            frame_functions.count("throws_exception_on_even(int)") == 0,
            "At catch our throw function is off the stack")
        self.assertTrue(
            frame_functions.count("intervening_function(int)") == 0,
            "At catch our intervening function is off the stack")
        self.assertTrue(
            frame_functions.count("catches_exception(int)") == 1,
            "At catch our catch function is on the stack")
Example #2
0
    def test_evaluate_expression_python(self):
        """Test SBFrame.EvaluateExpression() API for evaluating an expression."""
        self.build()

        exe = os.path.join(os.getcwd(), "a.out")

        target = self.dbg.CreateTarget(exe)
        self.assertTrue(target, VALID_TARGET)

        # Create the breakpoint.
        filespec = lldb.SBFileSpec("main.cpp", False)
        breakpoint = target.BreakpointCreateByLocation(filespec, self.line)
        self.assertTrue(breakpoint, VALID_BREAKPOINT)

        # Verify the breakpoint just created.
        self.expect(str(breakpoint),
                    BREAKPOINT_CREATED,
                    exe=False,
                    substrs=['main.cpp', str(self.line)])

        # Launch the process, and do not stop at the entry point.
        # Pass 'X Y Z' as the args, which makes argc == 4.
        process = target.LaunchSimple(['X', 'Y', 'Z'], None,
                                      self.get_process_working_directory())

        if not process:
            self.fail("SBTarget.LaunchProcess() failed")

        if process.GetState() != lldb.eStateStopped:
            self.fail("Process should be in the 'stopped' state, "
                      "instead the actual state is: '%s'" %
                      lldbutil.state_type_to_str(process.GetState()))

        thread = lldbutil.get_one_thread_stopped_at_breakpoint(
            process, breakpoint)
        self.assertIsNotNone(
            thread, "Expected one thread to be stopped at the breakpoint")

        # The filename of frame #0 should be 'main.cpp' and function is main.
        self.expect(lldbutil.get_filenames(thread)[0],
                    "Break correctly at main.cpp",
                    exe=False,
                    startstr="main.cpp")
        self.expect(lldbutil.get_function_names(thread)[0],
                    "Break correctly at main()",
                    exe=False,
                    startstr="main")

        # We should be stopped on the breakpoint with a hit count of 1.
        self.assertTrue(breakpoint.GetHitCount() == 1, BREAKPOINT_HIT_ONCE)

        #
        # Use Python API to evaluate expressions while stopped in a stack frame.
        #
        frame = thread.GetFrameAtIndex(0)

        val = frame.EvaluateExpression("2.234")
        self.expect(val.GetValue(),
                    "2.345 evaluated correctly",
                    exe=False,
                    startstr="2.234")
        self.expect(val.GetTypeName(),
                    "2.345 evaluated correctly",
                    exe=False,
                    startstr="double")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("argc")
        self.expect(val.GetValue(),
                    "Argc evaluated correctly",
                    exe=False,
                    startstr="4")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("*argv[1]")
        self.expect(val.GetValue(),
                    "Argv[1] evaluated correctly",
                    exe=False,
                    startstr="'X'")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("*argv[2]")
        self.expect(val.GetValue(),
                    "Argv[2] evaluated correctly",
                    exe=False,
                    startstr="'Y'")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("*argv[3]")
        self.expect(val.GetValue(),
                    "Argv[3] evaluated correctly",
                    exe=False,
                    startstr="'Z'")
        self.DebugSBValue(val)

        callee_break = target.BreakpointCreateByName("a_function_to_call",
                                                     None)
        self.assertTrue(callee_break.GetNumLocations() > 0)

        # Make sure ignoring breakpoints works from the command line:
        self.expect("expression -i true -- a_function_to_call()",
                    substrs=['(int) $', ' 1'])
        self.assertTrue(callee_break.GetHitCount() == 1)

        # Now try ignoring breakpoints using the SB API's:
        options = lldb.SBExpressionOptions()
        options.SetIgnoreBreakpoints(True)
        value = frame.EvaluateExpression('a_function_to_call()', options)
        self.assertTrue(value.IsValid())
        self.assertTrue(value.GetValueAsSigned(0) == 2)
        self.assertTrue(callee_break.GetHitCount() == 2)
Example #3
0
    def test_evaluate_expression_python(self):
        """Test SBFrame.EvaluateExpression() API for evaluating an expression."""
        self.build()

        exe = os.path.join(os.getcwd(), "a.out")

        target = self.dbg.CreateTarget(exe)
        self.assertTrue(target, VALID_TARGET)

        # Create the breakpoint.
        filespec = lldb.SBFileSpec("main.cpp", False)
        breakpoint = target.BreakpointCreateByLocation(filespec, self.line)
        self.assertTrue(breakpoint, VALID_BREAKPOINT)

        # Verify the breakpoint just created.
        self.expect(str(breakpoint), BREAKPOINT_CREATED, exe=False,
            substrs = ['main.cpp',
                       str(self.line)])

        # Launch the process, and do not stop at the entry point.
        # Pass 'X Y Z' as the args, which makes argc == 4.
        process = target.LaunchSimple (['X', 'Y', 'Z'], None, self.get_process_working_directory())

        if not process:
            self.fail("SBTarget.LaunchProcess() failed")

        if process.GetState() != lldb.eStateStopped:
            self.fail("Process should be in the 'stopped' state, "
                      "instead the actual state is: '%s'" %
                      lldbutil.state_type_to_str(process.GetState()))

        thread = lldbutil.get_one_thread_stopped_at_breakpoint(process, breakpoint)
        self.assertIsNotNone(thread, "Expected one thread to be stopped at the breakpoint")

        # The filename of frame #0 should be 'main.cpp' and function is main.
        self.expect(lldbutil.get_filenames(thread)[0],
                    "Break correctly at main.cpp", exe=False,
            startstr = "main.cpp")
        self.expect(lldbutil.get_function_names(thread)[0],
                    "Break correctly at main()", exe=False,
            startstr = "main")

        # We should be stopped on the breakpoint with a hit count of 1.
        self.assertTrue(breakpoint.GetHitCount() == 1, BREAKPOINT_HIT_ONCE)

        #
        # Use Python API to evaluate expressions while stopped in a stack frame.
        #
        frame = thread.GetFrameAtIndex(0)

        val = frame.EvaluateExpression("2.234")
        self.expect(val.GetValue(), "2.345 evaluated correctly", exe=False,
            startstr = "2.234")
        self.expect(val.GetTypeName(), "2.345 evaluated correctly", exe=False,
            startstr = "double")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("argc")
        self.expect(val.GetValue(), "Argc evaluated correctly", exe=False,
            startstr = "4")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("*argv[1]")
        self.expect(val.GetValue(), "Argv[1] evaluated correctly", exe=False,
            startstr = "'X'")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("*argv[2]")
        self.expect(val.GetValue(), "Argv[2] evaluated correctly", exe=False,
            startstr = "'Y'")
        self.DebugSBValue(val)

        val = frame.EvaluateExpression("*argv[3]")
        self.expect(val.GetValue(), "Argv[3] evaluated correctly", exe=False,
            startstr = "'Z'")
        self.DebugSBValue(val)

        callee_break = target.BreakpointCreateByName ("a_function_to_call", None)
        self.assertTrue(callee_break.GetNumLocations() > 0)

        # Make sure ignoring breakpoints works from the command line:
        self.expect("expression -i true -- a_function_to_call()",
                    substrs = ['(int) $', ' 1'])
        self.assertTrue (callee_break.GetHitCount() == 1)

        # Now try ignoring breakpoints using the SB API's:
        options = lldb.SBExpressionOptions()
        options.SetIgnoreBreakpoints(True)
        value = frame.EvaluateExpression('a_function_to_call()', options)
        self.assertTrue (value.IsValid())
        self.assertTrue (value.GetValueAsSigned(0) == 2)
        self.assertTrue (callee_break.GetHitCount() == 2)