| """Show bitfields and check that they display correctly.""" | |
| import lldb | |
| from lldbsuite.test.decorators import * | |
| from lldbsuite.test.lldbtest import * | |
| from lldbsuite.test import lldbutil | |
| class CppBitfieldsTestCase(TestBase): | |
| @no_debug_info_test | |
| @skipIf(oslist=["windows"], bugnumber="github.com/llvm/llvm-project/issues/105019") | |
| def test_bitfields(self): | |
| self.build() | |
| lldbutil.run_to_source_breakpoint( | |
| self, "// break here", lldb.SBFileSpec("main.cpp", False) | |
| ) | |
| # Accessing LargeBitsA. | |
| self.expect_expr( | |
| "lba", | |
| result_children=[ | |
| ValueCheck(name="", type="int:32"), | |
| ValueCheck(name="a", type="unsigned int:20", value="2"), | |
| ], | |
| ) | |
| self.expect_expr("lba.a", result_type="unsigned int", result_value="2") | |
| # Accessing LargeBitsB. | |
| self.expect_expr( | |
| "lbb", | |
| result_children=[ | |
| ValueCheck(name="a", type="unsigned int:1", value="1"), | |
| ValueCheck(name="", type="int:31"), | |
| ValueCheck(name="b", type="unsigned int:20", value="3"), | |
| ], | |
| ) | |
| self.expect_expr("lbb.b", result_type="unsigned int", result_value="3") | |
| # Accessing LargeBitsC. | |
| self.expect_expr( | |
| "lbc", | |
| result_children=[ | |
| ValueCheck(name="", type="int:22"), | |
| ValueCheck(name="a", type="unsigned int:1", value="1"), | |
| ValueCheck(name="b", type="unsigned int:1", value="0"), | |
| ValueCheck(name="c", type="unsigned int:5", value="4"), | |
| ValueCheck(name="d", type="unsigned int:1", value="1"), | |
| ValueCheck(name="", type="int:2"), | |
| ValueCheck(name="e", type="unsigned int:20", value="20"), | |
| ], | |
| ) | |
| self.expect_expr("lbc.c", result_type="unsigned int", result_value="4") | |
| # Accessing LargeBitsD. | |
| self.expect_expr( | |
| "lbd", | |
| result_children=[ | |
| ValueCheck(name="arr", type="char[3]", summary='"ab"'), | |
| ValueCheck(name="", type="int:32"), | |
| ValueCheck(name="a", type="unsigned int:20", value="5"), | |
| ], | |
| ) | |
| self.expect_expr("lbd.a", result_type="unsigned int", result_value="5") | |
| # Test BitfieldsInStructInUnion. | |
| # FIXME: This needs some more explanation for what it's actually testing. | |
| nested_struct_children = [ | |
| ValueCheck(name="", type="int:22"), | |
| ValueCheck(name="a", type="uint64_t:1", value="1"), | |
| ValueCheck(name="b", type="uint64_t:1", value="0"), | |
| ValueCheck(name="c", type="uint64_t:1", value="1"), | |
| ValueCheck(name="d", type="uint64_t:1", value="0"), | |
| ValueCheck(name="e", type="uint64_t:1", value="1"), | |
| ValueCheck(name="f", type="uint64_t:1", value="0"), | |
| ValueCheck(name="g", type="uint64_t:1", value="1"), | |
| ValueCheck(name="h", type="uint64_t:1", value="0"), | |
| ValueCheck(name="i", type="uint64_t:1", value="1"), | |
| ValueCheck(name="j", type="uint64_t:1", value="0"), | |
| ValueCheck(name="k", type="uint64_t:1", value="1"), | |
| ] | |
| self.expect_expr( | |
| "bitfields_in_struct_in_union", | |
| result_type="BitfieldsInStructInUnion", | |
| result_children=[ | |
| ValueCheck( | |
| name="", | |
| children=[ValueCheck(name="f", children=nested_struct_children)], | |
| ) | |
| ], | |
| ) | |
| self.expect_expr( | |
| "bitfields_in_struct_in_union.f.a", result_type="uint64_t", result_value="1" | |
| ) | |
| # Unions with bitfields. | |
| self.expect_expr( | |
| "uwbf", | |
| result_type="UnionWithBitfields", | |
| result_children=[ | |
| ValueCheck(name="a", value="255"), | |
| ValueCheck(name="b", value="65535"), | |
| ValueCheck(name="c", value="4294967295"), | |
| ValueCheck(name="x", value="4294967295"), | |
| ], | |
| ) | |
| self.expect_expr( | |
| "uwubf", | |
| result_type="UnionWithUnnamedBitfield", | |
| result_children=[ | |
| ValueCheck(name="a", value="16777215"), | |
| ValueCheck(name="x", value="4294967295"), | |
| ], | |
| ) | |
| # Class with a base class and a bitfield. | |
| self.expect_expr( | |
| "derived", | |
| result_type="Derived", | |
| result_children=[ | |
| ValueCheck( | |
| name="Base", | |
| children=[ValueCheck(name="b_a", value="2", type="uint32_t")], | |
| ), | |
| ValueCheck(name="d_a", value="1", type="uint32_t:1"), | |
| ], | |
| ) | |
| # Struct with bool bitfields. | |
| self.expect_expr( | |
| "bb", | |
| result_type="", | |
| result_children=[ | |
| ValueCheck(name="a", value="true", type="bool:1"), | |
| ValueCheck(name="b", value="false", type="bool:1"), | |
| ValueCheck(name="c", value="true", type="bool:2"), | |
| ValueCheck(name="d", value="true", type="bool:2"), | |
| ], | |
| ) | |
| bb = self.frame().FindVariable("bb") | |
| self.assertSuccess(bb.GetError()) | |
| bb_a = bb.GetChildAtIndex(0) | |
| self.assertSuccess(bb_a.GetError()) | |
| self.assertEqual(bb_a.GetValueAsUnsigned(), 1) | |
| self.assertEqual(bb_a.GetValueAsSigned(), 1) | |
| bb_b = bb.GetChildAtIndex(1) | |
| self.assertSuccess(bb_b.GetError()) | |
| self.assertEqual(bb_b.GetValueAsUnsigned(), 0) | |
| self.assertEqual(bb_b.GetValueAsSigned(), 0) | |
| bb_c = bb.GetChildAtIndex(2) | |
| self.assertSuccess(bb_c.GetError()) | |
| self.assertEqual(bb_c.GetValueAsUnsigned(), 1) | |
| self.assertEqual(bb_c.GetValueAsSigned(), 1) | |
| bb_d = bb.GetChildAtIndex(3) | |
| self.assertSuccess(bb_d.GetError()) | |
| self.assertEqual(bb_d.GetValueAsUnsigned(), 1) | |
| self.assertEqual(bb_d.GetValueAsSigned(), 1) | |
| # Test a class with a base class that has a vtable ptr. The derived | |
| # class has bitfields. | |
| base_with_vtable_children = [ | |
| ValueCheck(name="a", type="unsigned int:4", value="5"), | |
| ValueCheck(name="b", type="unsigned int:4", value="0"), | |
| ValueCheck(name="c", type="unsigned int:4", value="5"), | |
| ] | |
| self.expect_expr("base_with_vtable", result_children=base_with_vtable_children) | |
| self.expect_var_path("base_with_vtable", children=base_with_vtable_children) | |
| @no_debug_info_test | |
| def test_bitfield_behind_vtable_ptr(self): | |
| self.build() | |
| lldbutil.run_to_source_breakpoint( | |
| self, "// break here", lldb.SBFileSpec("main.cpp", False) | |
| ) | |
| # Test a class with a vtable ptr and bitfields. | |
| with_vtable_children = [ | |
| ValueCheck(name="a", type="unsigned int:4", value="5"), | |
| ValueCheck(name="b", type="unsigned int:4", value="0"), | |
| ValueCheck(name="c", type="unsigned int:4", value="5"), | |
| ] | |
| self.expect_expr("with_vtable", result_children=with_vtable_children) | |
| self.expect_var_path("with_vtable", children=with_vtable_children) | |
| # Test a class with a vtable ptr and unnamed bitfield directly after. | |
| with_vtable_and_unnamed_children = [ | |
| ValueCheck(name="", type="int:4", value="0"), | |
| ValueCheck(name="b", type="unsigned int:4", value="0"), | |
| ValueCheck(name="c", type="unsigned int:4", value="5"), | |
| ] | |
| self.expect_expr( | |
| "with_vtable_and_unnamed", result_children=with_vtable_and_unnamed_children | |
| ) | |
| self.expect_var_path( | |
| "with_vtable_and_unnamed", children=with_vtable_and_unnamed_children | |
| ) | |
| derived_with_vtable_children = [ | |
| ValueCheck( | |
| name="Base", | |
| children=[ValueCheck(name="b_a", value="2", type="uint32_t")], | |
| ), | |
| ValueCheck(name="a", value="1", type="unsigned int:1"), | |
| ] | |
| self.expect_expr( | |
| "derived_with_vtable", result_children=derived_with_vtable_children | |
| ) | |
| self.expect_var_path( | |
| "derived_with_vtable", children=derived_with_vtable_children | |
| ) |