| """ | |
| Test some SBValue APIs. | |
| """ | |
| import lldb | |
| from lldbsuite.test.decorators import * | |
| from lldbsuite.test.lldbtest import * | |
| from lldbsuite.test import lldbutil | |
| class ChangeValueAPITestCase(TestBase): | |
| mydir = TestBase.compute_mydir(__file__) | |
| def setUp(self): | |
| # Call super's setUp(). | |
| TestBase.setUp(self) | |
| # We'll use the test method name as the exe_name. | |
| self.exe_name = self.testMethodName | |
| # Find the line number to of function 'c'. | |
| self.line = line_number('main.c', '// Stop here and set values') | |
| self.check_line = line_number( | |
| 'main.c', '// Stop here and check values') | |
| self.end_line = line_number( | |
| 'main.c', '// Set a breakpoint here at the end') | |
| @expectedFlakeyLinux("llvm.org/pr25652") | |
| @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24772") | |
| def test_change_value(self): | |
| """Exercise the SBValue::SetValueFromCString API.""" | |
| d = {'EXE': self.exe_name} | |
| self.build(dictionary=d) | |
| self.setTearDownCleanup(dictionary=d) | |
| exe = self.getBuildArtifact(self.exe_name) | |
| # Create a target by the debugger. | |
| target = self.dbg.CreateTarget(exe) | |
| self.assertTrue(target, VALID_TARGET) | |
| # Create the breakpoint inside function 'main'. | |
| breakpoint = target.BreakpointCreateByLocation('main.c', self.line) | |
| self.assertTrue(breakpoint, VALID_BREAKPOINT) | |
| # Create the breakpoint inside the function 'main' | |
| check_breakpoint = target.BreakpointCreateByLocation( | |
| 'main.c', self.check_line) | |
| self.assertTrue(check_breakpoint, VALID_BREAKPOINT) | |
| # Create the breakpoint inside function 'main'. | |
| end_breakpoint = target.BreakpointCreateByLocation( | |
| 'main.c', self.end_line) | |
| self.assertTrue(end_breakpoint, VALID_BREAKPOINT) | |
| # Now launch the process, and do not stop at entry point. | |
| process = target.LaunchSimple( | |
| None, None, self.get_process_working_directory()) | |
| self.assertTrue(process, PROCESS_IS_VALID) | |
| # Get Frame #0. | |
| self.assertEquals(process.GetState(), lldb.eStateStopped) | |
| thread = lldbutil.get_stopped_thread( | |
| process, lldb.eStopReasonBreakpoint) | |
| self.assertTrue( | |
| thread.IsValid(), | |
| "There should be a thread stopped due to breakpoint condition") | |
| frame0 = thread.GetFrameAtIndex(0) | |
| self.assertTrue(frame0.IsValid(), "Got a valid frame.") | |
| # Get the val variable and change it: | |
| error = lldb.SBError() | |
| val_value = frame0.FindVariable("val") | |
| self.assertTrue(val_value.IsValid(), "Got the SBValue for val") | |
| actual_value = val_value.GetValueAsSigned(error, 0) | |
| self.assertTrue(error.Success(), "Got a value from val") | |
| self.assertEquals(actual_value, 100, "Got the right value from val") | |
| result = val_value.SetValueFromCString("12345") | |
| self.assertTrue(result, "Setting val returned True.") | |
| actual_value = val_value.GetValueAsSigned(error, 0) | |
| self.assertTrue(error.Success(), "Got a changed value from val") | |
| self.assertEqual( | |
| actual_value, 12345, | |
| "Got the right changed value from val") | |
| # Now check that we can set a structure element: | |
| mine_value = frame0.FindVariable("mine") | |
| self.assertTrue(mine_value.IsValid(), "Got the SBValue for mine") | |
| mine_second_value = mine_value.GetChildMemberWithName("second_val") | |
| self.assertTrue( | |
| mine_second_value.IsValid(), | |
| "Got second_val from mine") | |
| actual_value = mine_second_value.GetValueAsUnsigned(error, 0) | |
| self.assertTrue( | |
| error.Success(), | |
| "Got an unsigned value for second_val") | |
| self.assertEquals(actual_value, 5555) | |
| result = mine_second_value.SetValueFromCString("98765") | |
| self.assertTrue(result, "Success setting mine.second_value.") | |
| actual_value = mine_second_value.GetValueAsSigned(error, 0) | |
| self.assertTrue( | |
| error.Success(), | |
| "Got a changed value from mine.second_val") | |
| self.assertEquals(actual_value, 98765, | |
| "Got the right changed value from mine.second_val") | |
| # Next do the same thing with the pointer version. | |
| ptr_value = frame0.FindVariable("ptr") | |
| self.assertTrue(ptr_value.IsValid(), "Got the SBValue for ptr") | |
| ptr_second_value = ptr_value.GetChildMemberWithName("second_val") | |
| self.assertTrue(ptr_second_value.IsValid(), "Got second_val from ptr") | |
| actual_value = ptr_second_value.GetValueAsUnsigned(error, 0) | |
| self.assertTrue( | |
| error.Success(), | |
| "Got an unsigned value for ptr->second_val") | |
| self.assertEquals(actual_value, 6666) | |
| result = ptr_second_value.SetValueFromCString("98765") | |
| self.assertTrue(result, "Success setting ptr->second_value.") | |
| actual_value = ptr_second_value.GetValueAsSigned(error, 0) | |
| self.assertTrue( | |
| error.Success(), | |
| "Got a changed value from ptr->second_val") | |
| self.assertEquals(actual_value, 98765, | |
| "Got the right changed value from ptr->second_val") | |
| # gcc may set multiple locations for breakpoint | |
| breakpoint.SetEnabled(False) | |
| # Now continue. | |
| process.Continue() | |
| self.assertEquals(process.GetState(), lldb.eStateStopped) | |
| thread = lldbutil.get_stopped_thread( | |
| process, lldb.eStopReasonBreakpoint) | |
| self.assertTrue( | |
| thread.IsValid(), | |
| "There should be a thread stopped due to breakpoint condition") | |
| expected_value = "Val - 12345 Mine - 55, 98765, 55555555. Ptr - 66, 98765, 66666666" | |
| stdout = process.GetSTDOUT(1000) | |
| self.assertTrue( | |
| expected_value in stdout, | |
| "STDOUT showed changed values.") | |
| # Finally, change the stack pointer to 0, and we should not make it to | |
| # our end breakpoint. | |
| frame0 = thread.GetFrameAtIndex(0) | |
| self.assertTrue(frame0.IsValid(), "Second time: got a valid frame.") | |
| sp_value = frame0.FindValue("sp", lldb.eValueTypeRegister) | |
| self.assertTrue(sp_value.IsValid(), "Got a stack pointer value") | |
| result = sp_value.SetValueFromCString("1") | |
| self.assertTrue(result, "Setting sp returned true.") | |
| actual_value = sp_value.GetValueAsUnsigned(error, 0) | |
| self.assertTrue(error.Success(), "Got a changed value for sp") | |
| self.assertEqual( | |
| actual_value, 1, | |
| "Got the right changed value for sp.") | |
| # Boundary condition test the SBValue.CreateValueFromExpression() API. | |
| # LLDB should not crash! | |
| nosuchval = mine_value.CreateValueFromExpression(None, None) | |
| process.Continue() | |
| self.assertEquals(process.GetState(), lldb.eStateStopped) | |
| thread = lldbutil.get_stopped_thread( | |
| process, lldb.eStopReasonBreakpoint) | |
| self.assertTrue( | |
| thread is None, | |
| "We should not have managed to hit our second breakpoint with sp == 1") | |
| process.Kill() |