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"""
Tests expression evaluation in context of an object.
"""
import lldb
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.lldbtest import *
from lldbsuite.test.decorators import *
class ContextObjectTestCase(TestBase):
@expectedFailureAll(setting=('plugin.typesystem.clang.experimental-redecl-completion', 'true'))
def test_context_object_eval_function(self):
"""Tests expression evaluation of functions in context of an object."""
self.build()
(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
self, "// Break here", self.main_source_spec
)
frame = thread.GetFrameAtIndex(0)
for obj in "cpp_struct", "cpp_struct_ref":
obj_val = frame.FindVariable(obj)
self.assertTrue(obj_val.IsValid())
# Test functions evaluation
value = obj_val.EvaluateExpression("function()")
self.assertTrue(value.IsValid())
self.assertSuccess(value.GetError())
self.assertEqual(value.GetValueAsSigned(), 2222)
def test_context_object(self):
"""Tests expression evaluation in context of an object."""
self.build()
(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
self, "// Break here", self.main_source_spec
)
frame = thread.GetFrameAtIndex(0)
#
# Test C++ struct variable and reference-to-struct variable
#
for obj in "cpp_struct", "cpp_struct_ref":
obj_val = frame.FindVariable(obj)
self.assertTrue(obj_val.IsValid())
# Test an empty expression evaluation
value = obj_val.EvaluateExpression("")
self.assertFalse(value.IsValid())
self.assertFalse(value.GetError().Success())
# Test retrieveing of a field (not a local with the same name)
value = obj_val.EvaluateExpression("field")
self.assertTrue(value.IsValid())
self.assertSuccess(value.GetError())
self.assertEqual(value.GetValueAsSigned(), 1111)
# Test that we retrieve the right global
value = obj_val.EvaluateExpression("global.field")
self.assertTrue(value.IsValid())
self.assertSuccess(value.GetError())
self.assertEqual(value.GetValueAsSigned(), 1111)
#
# Test C++ union variable
#
obj_val = frame.FindVariable("cpp_union")
self.assertTrue(obj_val.IsValid())
# Test retrieveing of a field
value = obj_val.EvaluateExpression("field_int")
self.assertTrue(value.IsValid())
self.assertSuccess(value.GetError())
self.assertEqual(value.GetValueAsSigned(), 5555)
#
# Test C++ scalar
#
obj_val = frame.FindVariable("cpp_scalar")
self.assertTrue(obj_val.IsValid())
# Test an expression evaluation
value = obj_val.EvaluateExpression("1")
self.assertTrue(value.IsValid())
self.assertFalse(value.GetError().Success())
#
# Test C++ array
#
obj_val = frame.FindVariable("cpp_array")
self.assertTrue(obj_val.IsValid())
# Test an expression evaluation
value = obj_val.EvaluateExpression("1")
self.assertTrue(value.IsValid())
self.assertFalse(value.GetError().Success())
# Test retrieveing of an element's field
value = obj_val.GetValueForExpressionPath("[7]").EvaluateExpression("field")
self.assertTrue(value.IsValid())
self.assertSuccess(value.GetError())
self.assertEqual(value.GetValueAsSigned(), 1111)
#
# Test C++ pointer
#
obj_val = frame.FindVariable("cpp_pointer")
self.assertTrue(obj_val.IsValid())
# Test an expression evaluation
value = obj_val.EvaluateExpression("1")
self.assertTrue(value.IsValid())
self.assertFalse(value.GetError().Success())
# Test retrieveing of a dereferenced object's field
value = obj_val.Dereference().EvaluateExpression("field")
self.assertTrue(value.IsValid())
self.assertSuccess(value.GetError())
self.assertEqual(value.GetValueAsSigned(), 1111)
#
# Test C++ computation result
#
obj_val = frame.EvaluateExpression("cpp_namespace::GetCppStruct()")
self.assertTrue(obj_val.IsValid())
# Test an expression evaluation
value = obj_val.EvaluateExpression("1")
self.assertTrue(value.IsValid())
self.assertFalse(value.GetError().Success())
#
# Test C++ computation result located in debuggee memory
#
obj_val = frame.EvaluateExpression("cpp_namespace::GetCppStructPtr()")
self.assertTrue(obj_val.IsValid())
# Test an expression evaluation
value = obj_val.EvaluateExpression("1")
self.assertTrue(value.IsValid())
self.assertFalse(value.GetError().Success())
# Test retrieveing of a dereferenced object's field
value = obj_val.Dereference().EvaluateExpression("field")
self.assertTrue(value.IsValid())
self.assertSuccess(value.GetError())
self.assertEqual(value.GetValueAsSigned(), 1111)
def setUp(self):
TestBase.setUp(self)
self.main_source = "main.cpp"
self.main_source_spec = lldb.SBFileSpec(self.main_source)
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