182 lines · python
1"""2Test some SBValue APIs.3"""4 5import lldb6from lldbsuite.test.decorators import *7from lldbsuite.test.lldbtest import *8from lldbsuite.test import lldbutil9 10 11class ChangeValueAPITestCase(TestBase):12 def setUp(self):13 # Call super's setUp().14 TestBase.setUp(self)15 # We'll use the test method name as the exe_name.16 self.exe_name = self.testMethodName17 # Find the line number to of function 'c'.18 self.line = line_number("main.c", "// Stop here and set values")19 self.check_line = line_number("main.c", "// Stop here and check values")20 self.end_line = line_number("main.c", "// Set a breakpoint here at the end")21 22 @expectedFlakeyLinux("llvm.org/pr25652")23 @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24772")24 def test_change_value(self):25 """Exercise the SBValue::SetValueFromCString API."""26 d = {"EXE": self.exe_name}27 self.build(dictionary=d)28 self.setTearDownCleanup(dictionary=d)29 exe = self.getBuildArtifact(self.exe_name)30 31 # Create a target by the debugger.32 target = self.dbg.CreateTarget(exe)33 self.assertTrue(target, VALID_TARGET)34 35 # Create the breakpoint inside function 'main'.36 breakpoint = target.BreakpointCreateByLocation("main.c", self.line)37 self.assertTrue(breakpoint, VALID_BREAKPOINT)38 39 # Create the breakpoint inside the function 'main'40 check_breakpoint = target.BreakpointCreateByLocation("main.c", self.check_line)41 self.assertTrue(check_breakpoint, VALID_BREAKPOINT)42 43 # Create the breakpoint inside function 'main'.44 end_breakpoint = target.BreakpointCreateByLocation("main.c", self.end_line)45 self.assertTrue(end_breakpoint, VALID_BREAKPOINT)46 47 # Now launch the process, and do not stop at entry point.48 process = target.LaunchSimple(None, None, self.get_process_working_directory())49 self.assertTrue(process, PROCESS_IS_VALID)50 51 # Get Frame #0.52 self.assertState(process.GetState(), lldb.eStateStopped)53 thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)54 self.assertTrue(55 thread.IsValid(),56 "There should be a thread stopped due to breakpoint condition",57 )58 frame0 = thread.GetFrameAtIndex(0)59 self.assertTrue(frame0.IsValid(), "Got a valid frame.")60 61 # Get the val variable and change it:62 error = lldb.SBError()63 64 val_value = frame0.FindVariable("val")65 self.assertTrue(val_value.IsValid(), "Got the SBValue for val")66 actual_value = val_value.GetValueAsSigned(error, 0)67 self.assertSuccess(error, "Got a value from val")68 self.assertEqual(actual_value, 100, "Got the right value from val")69 70 result = val_value.SetValueFromCString("12345")71 self.assertTrue(result, "Setting val returned True.")72 actual_value = val_value.GetValueAsSigned(error, 0)73 self.assertSuccess(error, "Got a changed value from val")74 self.assertEqual(actual_value, 12345, "Got the right changed value from val")75 76 # Now check that we can set a structure element:77 78 mine_value = frame0.FindVariable("mine")79 self.assertTrue(mine_value.IsValid(), "Got the SBValue for mine")80 81 mine_second_value = mine_value.GetChildMemberWithName("second_val")82 self.assertTrue(mine_second_value.IsValid(), "Got second_val from mine")83 actual_value = mine_second_value.GetValueAsUnsigned(error, 0)84 self.assertTrue(error.Success(), "Got an unsigned value for second_val")85 self.assertEqual(actual_value, 5555)86 87 result = mine_second_value.SetValueFromCString("98765")88 self.assertTrue(result, "Success setting mine.second_value.")89 actual_value = mine_second_value.GetValueAsSigned(error, 0)90 self.assertTrue(error.Success(), "Got a changed value from mine.second_val")91 self.assertEqual(92 actual_value, 98765, "Got the right changed value from mine.second_val"93 )94 95 # Next do the same thing with the pointer version.96 ptr_value = frame0.FindVariable("ptr")97 self.assertTrue(ptr_value.IsValid(), "Got the SBValue for ptr")98 99 ptr_second_value = ptr_value.GetChildMemberWithName("second_val")100 self.assertTrue(ptr_second_value.IsValid(), "Got second_val from ptr")101 actual_value = ptr_second_value.GetValueAsUnsigned(error, 0)102 self.assertTrue(error.Success(), "Got an unsigned value for ptr->second_val")103 self.assertEqual(actual_value, 6666)104 105 result = ptr_second_value.SetValueFromCString("98765")106 self.assertTrue(result, "Success setting ptr->second_value.")107 actual_value = ptr_second_value.GetValueAsSigned(error, 0)108 self.assertTrue(error.Success(), "Got a changed value from ptr->second_val")109 self.assertEqual(110 actual_value, 98765, "Got the right changed value from ptr->second_val"111 )112 113 ptr_fourth_value = ptr_value.GetChildMemberWithName("fourth_val")114 self.assertTrue(ptr_fourth_value.IsValid(), "Got fourth_val from ptr")115 fourth_actual_value = ptr_fourth_value.GetValueAsUnsigned(error, 1)116 self.assertTrue(error.Success(), "Got an unsigned value for ptr->fourth_val")117 self.assertEqual(fourth_actual_value, 0)118 119 result = ptr_fourth_value.SetValueFromCString("true")120 self.assertTrue(result, "Success setting ptr->fourth_val.")121 fourth_actual_value = ptr_fourth_value.GetValueAsSigned(error, 0)122 self.assertTrue(error.Success(), "Got a changed value from ptr->fourth_val")123 self.assertEqual(124 fourth_actual_value, 1, "Got the right changed value from ptr->fourth_val"125 )126 127 result = ptr_fourth_value.SetValueFromCString("NO")128 self.assertFalse(result, "Failed setting ptr->fourth_val.")129 fourth_actual_value = ptr_fourth_value.GetValueAsSigned(error, 0)130 self.assertTrue(error.Success(), "Got the original value from ptr->fourth_val")131 self.assertEqual(132 fourth_actual_value,133 1,134 "Got the original changed value from ptr->fourth_val",135 )136 137 # gcc may set multiple locations for breakpoint138 breakpoint.SetEnabled(False)139 140 # Now continue.141 process.Continue()142 143 self.assertState(process.GetState(), lldb.eStateStopped)144 thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)145 self.assertTrue(146 thread.IsValid(),147 "There should be a thread stopped due to breakpoint condition",148 )149 150 expected_value = (151 "Val - 12345 Mine - 55, 98765, 55555555, 0. Ptr - 66, 98765, 66666666, 1"152 )153 stdout = process.GetSTDOUT(1000)154 self.assertIn(expected_value, stdout, "STDOUT showed changed values.")155 156 # Finally, change the stack pointer to 0, and we should not make it to157 # our end breakpoint.158 frame0 = thread.GetFrameAtIndex(0)159 self.assertTrue(frame0.IsValid(), "Second time: got a valid frame.")160 sp_value = frame0.FindValue("sp", lldb.eValueTypeRegister)161 self.assertTrue(sp_value.IsValid(), "Got a stack pointer value")162 result = sp_value.SetValueFromCString("1")163 self.assertTrue(result, "Setting sp returned true.")164 actual_value = sp_value.GetValueAsUnsigned(error, 0)165 self.assertSuccess(error, "Got a changed value for sp")166 self.assertEqual(actual_value, 1, "Got the right changed value for sp.")167 168 # Boundary condition test the SBValue.CreateValueFromExpression() API.169 # LLDB should not crash!170 nosuchval = mine_value.CreateValueFromExpression(None, None)171 172 process.Continue()173 174 self.assertState(process.GetState(), lldb.eStateStopped)175 thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)176 self.assertIsNone(177 thread,178 "We should not have managed to hit our second breakpoint with sp == 1",179 )180 181 process.Kill()182