| """ |
| Test stopping at a breakpoint in an expression, and unwinding from there. |
| """ |
| |
| from __future__ import print_function |
| |
| |
| import unittest2 |
| |
| import os |
| import time |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class UnwindFromExpressionTest(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| def setUp(self): |
| # Call super's setUp(). |
| TestBase.setUp(self) |
| |
| @add_test_categories(['pyapi']) |
| def test_unwind_expression(self): |
| """Test unwinding from 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. |
| main_spec = lldb.SBFileSpec("main.cpp", False) |
| breakpoint = target.BreakpointCreateBySourceRegex( |
| "// Set a breakpoint here to get started", main_spec) |
| self.assertTrue(breakpoint, VALID_BREAKPOINT) |
| |
| # Launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple( |
| None, 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") |
| |
| # |
| # Use Python API to evaluate expressions while stopped in a stack frame. |
| # |
| main_frame = thread.GetFrameAtIndex(0) |
| |
| # Next set a breakpoint in this function, set up Expression options to stop on |
| # breakpoint hits, and call the function. |
| fun_bkpt = target.BreakpointCreateBySourceRegex( |
| "// Stop inside the function here.", main_spec) |
| self.assertTrue(fun_bkpt, VALID_BREAKPOINT) |
| options = lldb.SBExpressionOptions() |
| options.SetIgnoreBreakpoints(False) |
| options.SetUnwindOnError(False) |
| |
| val = main_frame.EvaluateExpression("a_function_to_call()", options) |
| |
| self.assertTrue( |
| val.GetError().Fail(), |
| "We did not complete the execution.") |
| error_str = val.GetError().GetCString() |
| self.assertTrue( |
| "Execution was interrupted, reason: breakpoint" in error_str, |
| "And the reason was right.") |
| |
| thread = lldbutil.get_one_thread_stopped_at_breakpoint( |
| process, fun_bkpt) |
| self.assertTrue( |
| thread.IsValid(), |
| "We are indeed stopped at our breakpoint") |
| |
| # Now unwind the expression, and make sure we got back to where we |
| # started. |
| error = thread.UnwindInnermostExpression() |
| self.assertTrue(error.Success(), "We succeeded in unwinding") |
| |
| cur_frame = thread.GetFrameAtIndex(0) |
| self.assertTrue( |
| cur_frame.IsEqual(main_frame), |
| "We got back to the main frame.") |
