| """ |
| Test lldb Python API SBValue::Cast(SBType) for C++ types. |
| """ |
| |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class CppValueCastTestCase(TestBase): |
| @skipIf(bugnumber="llvm.org/PR36714") |
| @add_test_categories(["pyapi"]) |
| def test_value_cast_with_virtual_inheritance(self): |
| """Test SBValue::Cast(SBType) API for C++ types with virtual inheritance.""" |
| self.build(dictionary=self.d_virtual) |
| self.setTearDownCleanup(dictionary=self.d_virtual) |
| self.do_sbvalue_cast(self.exe_name) |
| |
| @add_test_categories(["pyapi"]) |
| def test_value_cast_with_regular_inheritance(self): |
| """Test SBValue::Cast(SBType) API for C++ types with regular inheritance.""" |
| self.build(dictionary=self.d_regular) |
| self.setTearDownCleanup(dictionary=self.d_regular) |
| self.do_sbvalue_cast(self.exe_name) |
| |
| def setUp(self): |
| # Call super's setUp(). |
| TestBase.setUp(self) |
| |
| # Find the line number to break for main.c. |
| self.source = "sbvalue-cast.cpp" |
| self.line = line_number(self.source, "// Set breakpoint here.") |
| self.exe_name = self.testMethodName |
| self.d_virtual = { |
| "CXX_SOURCES": self.source, |
| "EXE": self.exe_name, |
| "CFLAGS_EXTRAS": "-DDO_VIRTUAL_INHERITANCE", |
| } |
| self.d_regular = {"CXX_SOURCES": self.source, "EXE": self.exe_name} |
| |
| def do_sbvalue_cast(self, exe_name): |
| """Test SBValue::Cast(SBType) API for C++ types.""" |
| exe = self.getBuildArtifact(exe_name) |
| |
| # Create a target from the debugger. |
| |
| target = self.dbg.CreateTarget(exe) |
| self.assertTrue(target, VALID_TARGET) |
| |
| # Set up our breakpoints: |
| |
| breakpoint = target.BreakpointCreateByLocation(self.source, self.line) |
| self.assertTrue(breakpoint, VALID_BREAKPOINT) |
| |
| # Now launch the process, and do not stop at the entry point. |
| process = target.LaunchSimple(None, None, self.get_process_working_directory()) |
| |
| self.assertState(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED) |
| |
| # Find DerivedA and DerivedB types. |
| typeA = target.FindFirstType("DerivedA") |
| typeB = target.FindFirstType("DerivedB") |
| self.DebugSBType(typeA) |
| self.DebugSBType(typeB) |
| self.assertTrue(typeA) |
| self.assertTrue(typeB) |
| error = lldb.SBError() |
| |
| # First stop is for DerivedA instance. |
| threads = lldbutil.get_threads_stopped_at_breakpoint(process, breakpoint) |
| self.assertEqual(len(threads), 1) |
| thread = threads[0] |
| frame0 = thread.GetFrameAtIndex(0) |
| |
| tellerA = frame0.FindVariable("teller", lldb.eNoDynamicValues) |
| self.DebugSBValue(tellerA) |
| self.assertEqual( |
| tellerA.GetChildMemberWithName("m_base_val").GetValueAsUnsigned(error, 0), |
| 20, |
| ) |
| |
| if self.TraceOn(): |
| for child in tellerA: |
| print("child name:", child.GetName()) |
| print(child) |
| |
| # Call SBValue.Cast() to obtain instanceA. |
| instanceA = tellerA.Cast(typeA.GetPointerType()) |
| self.DebugSBValue(instanceA) |
| |
| # Iterate through all the children and print their values. |
| if self.TraceOn(): |
| for child in instanceA: |
| print("child name:", child.GetName()) |
| print(child) |
| a_member_val = instanceA.GetChildMemberWithName("m_a_val") |
| self.DebugSBValue(a_member_val) |
| self.assertEqual(a_member_val.GetValueAsUnsigned(error, 0), 10) |
| |
| # Second stop is for DerivedB instance. |
| threads = lldbutil.continue_to_breakpoint(process, breakpoint) |
| self.assertEqual(len(threads), 1) |
| thread = threads[0] |
| frame0 = thread.GetFrameAtIndex(0) |
| |
| tellerB = frame0.FindVariable("teller", lldb.eNoDynamicValues) |
| self.DebugSBValue(tellerB) |
| self.assertEqual( |
| tellerB.GetChildMemberWithName("m_base_val").GetValueAsUnsigned(error, 0), |
| 12, |
| ) |
| |
| if self.TraceOn(): |
| for child in tellerB: |
| print("child name:", child.GetName()) |
| print(child) |
| |
| # Call SBValue.Cast() to obtain instanceB. |
| instanceB = tellerB.Cast(typeB.GetPointerType()) |
| self.DebugSBValue(instanceB) |
| |
| # Iterate through all the children and print their values. |
| if self.TraceOn(): |
| for child in instanceB: |
| print("child name:", child.GetName()) |
| print(child) |
| b_member_val = instanceB.GetChildMemberWithName("m_b_val") |
| self.DebugSBValue(b_member_val) |
| self.assertEqual(b_member_val.GetValueAsUnsigned(error, 0), 36) |