| """Test C bitfields.""" |
| |
| |
| |
| import lldb |
| from lldbsuite.test.decorators import * |
| from lldbsuite.test.lldbtest import * |
| from lldbsuite.test import lldbutil |
| |
| |
| class TestCase(TestBase): |
| |
| mydir = TestBase.compute_mydir(__file__) |
| |
| def run_to_main(self): |
| self.build() |
| lldbutil.run_to_source_breakpoint(self, "// break here", lldb.SBFileSpec("main.c")) |
| |
| # BitFields exhibit crashes in record layout on Windows |
| # (http://llvm.org/pr21800) |
| @skipIfWindows |
| def test_bits(self): |
| self.run_to_main() |
| |
| # Check each field of Bits. |
| bits_children = [ |
| ValueCheck(type="int:1"), # Unnamed and uninitialized |
| ValueCheck(type="uint32_t:1", name="b1", value="1"), |
| ValueCheck(type="uint32_t:2", name="b2", value="3"), |
| ValueCheck(type="int:2"), # Unnamed and uninitialized |
| ValueCheck(type="uint32_t:3", name="b3", value="7"), |
| ValueCheck(type="uint32_t", name="b4", value="15"), |
| ValueCheck(type="uint32_t:5", name="b5", value="31"), |
| ValueCheck(type="uint32_t:6", name="b6", value="63"), |
| ValueCheck(type="uint32_t:7", name="b7", value="127"), |
| ValueCheck(type="uint32_t:4", name="four", value="15") |
| ] |
| self.expect_var_path("bits", type="Bits", children=bits_children) |
| self.expect_expr("bits", result_children=bits_children) |
| |
| # Try accessing the different fields using the expression evaluator. |
| self.expect_expr("bits.b1", result_type="uint32_t", result_value="1") |
| self.expect_expr("bits.b2", result_type="uint32_t", result_value="3") |
| self.expect_expr("bits.b3", result_type="uint32_t", result_value="7") |
| self.expect_expr("bits.b4", result_type="uint32_t", result_value="15") |
| self.expect_expr("bits.b5", result_type="uint32_t", result_value="31") |
| self.expect_expr("bits.b6", result_type="uint32_t", result_value="63") |
| self.expect_expr("bits.b7", result_type="uint32_t", result_value="127") |
| self.expect_expr("bits.four", result_type="uint32_t", result_value="15") |
| |
| # Try accessing the different fields using variable paths. |
| self.expect_var_path("bits.b1", type="uint32_t:1", value="1") |
| self.expect_var_path("bits.b2", type="uint32_t:2", value="3") |
| self.expect_var_path("bits.b4", type="uint32_t", value="15") |
| self.expect_var_path("bits.b5", type="uint32_t:5", value="31") |
| self.expect_var_path("bits.b7", type="uint32_t:7", value="127") |
| |
| |
| # Check each field of MoreBits. |
| more_bits_children = [ |
| ValueCheck(type="uint32_t:3", name="a", value="3"), |
| ValueCheck(type="int:1", value="0"), |
| ValueCheck(type="uint8_t:1", name="b", value="'\\0'"), |
| ValueCheck(type="uint8_t:1", name="c", value="'\\x01'"), |
| ValueCheck(type="uint8_t:1", name="d", value="'\\0'"), |
| ] |
| self.expect_var_path("more_bits", type="MoreBits", children=more_bits_children) |
| self.expect_expr("more_bits", result_children=more_bits_children) |
| |
| self.expect_expr("more_bits.a", result_type="uint32_t", result_value="3") |
| self.expect_expr("more_bits.b", result_type="uint8_t", result_value="'\\0'") |
| self.expect_expr("more_bits.c", result_type="uint8_t", result_value="'\\x01'") |
| self.expect_expr("more_bits.d", result_type="uint8_t", result_value="'\\0'") |
| |
| # Test a struct with several single bit fields. |
| many_single_bits_children = [ |
| ValueCheck(type="uint16_t:1", name="b1", value="1"), |
| ValueCheck(type="uint16_t:1", name="b2", value="0"), |
| ValueCheck(type="uint16_t:1", name="b3", value="0"), |
| ValueCheck(type="uint16_t:1", name="b4", value="0"), |
| ValueCheck(type="uint16_t:1", name="b5", value="1"), |
| ValueCheck(type="uint16_t:1", name="b6", value="0"), |
| ValueCheck(type="uint16_t:1", name="b7", value="1"), |
| ValueCheck(type="uint16_t:1", name="b8", value="0"), |
| ValueCheck(type="uint16_t:1", name="b9", value="0"), |
| ValueCheck(type="uint16_t:1", name="b10", value="0"), |
| ValueCheck(type="uint16_t:1", name="b11", value="0"), |
| ValueCheck(type="uint16_t:1", name="b12", value="0"), |
| ValueCheck(type="uint16_t:1", name="b13", value="1"), |
| ValueCheck(type="uint16_t:1", name="b14", value="0"), |
| ValueCheck(type="uint16_t:1", name="b15", value="0"), |
| ValueCheck(type="uint16_t:1", name="b16", value="0"), |
| ValueCheck(type="uint16_t:1", name="b17", value="0"), |
| ] |
| self.expect_var_path("many_single_bits", type="ManySingleBits", children=many_single_bits_children) |
| self.expect_expr("many_single_bits", result_type="ManySingleBits", |
| result_children=many_single_bits_children) |
| |
| # Check a packed struct. |
| self.expect_expr("packed.a", result_type="char", result_value="'a'") |
| self.expect_expr("packed.b", result_type="uint32_t", result_value="10") |
| self.expect_expr("packed.c", result_type="uint32_t", result_value=str(int("7112233", 16))) |
| |
| # A packed struct with bitfield size > 32. |
| self.expect("v/x large_packed", VARIABLES_DISPLAYED_CORRECTLY, |
| substrs=["a = 0x0000000cbbbbaaaa", "b = 0x0000000dffffeee"]) |
| |
| # Check reading a bitfield through a pointer in various ways (PR47743) |
| self.expect("v/x large_packed_ptr->b", |
| substrs=["large_packed_ptr->b = 0x0000000dffffeeee"]) |
| self.expect("v/x large_packed_ptr[0].b", |
| substrs=["large_packed_ptr[0].b = 0x0000000dffffeeee"]) |
| |
| # BitFields exhibit crashes in record layout on Windows |
| # (http://llvm.org/pr21800) |
| @skipIfWindows |
| def test_expression_bug(self): |
| # Ensure evaluating (emulating) an expression does not break bitfield |
| # values for already parsed variables. The expression is run twice |
| # because the very first expression can resume a target (to allocate |
| # memory, etc.) even if it is not being jitted. |
| self.run_to_main() |
| |
| self.expect("v/x large_packed", VARIABLES_DISPLAYED_CORRECTLY, |
| substrs=["a = 0x0000000cbbbbaaaa", "b = 0x0000000dffffeee"]) |
| self.expect("expr --allow-jit false -- more_bits.a", VARIABLES_DISPLAYED_CORRECTLY, |
| substrs=['uint32_t', '3']) |
| self.expect("v/x large_packed", VARIABLES_DISPLAYED_CORRECTLY, |
| substrs=["a = 0x0000000cbbbbaaaa", "b = 0x0000000dffffeee"]) |
| self.expect("expr --allow-jit false -- more_bits.a", VARIABLES_DISPLAYED_CORRECTLY, |
| substrs=['uint32_t', '3']) |
| self.expect("v/x large_packed", VARIABLES_DISPLAYED_CORRECTLY, |
| substrs=["a = 0x0000000cbbbbaaaa", "b = 0x0000000dffffeee"]) |
| |
| @add_test_categories(['pyapi']) |
| # BitFields exhibit crashes in record layout on Windows |
| # (http://llvm.org/pr21800) |
| @skipIfWindows |
| def test_and_python_api(self): |
| """Use Python APIs to inspect a bitfields variable.""" |
| self.run_to_main() |
| |
| # Lookup the "bits" variable which contains 8 bitfields. |
| bits = self.frame().FindVariable("bits") |
| self.DebugSBValue(bits) |
| self.assertEqual(bits.GetTypeName(), 'Bits') |
| self.assertEqual(bits.GetNumChildren(), 10) |
| self.assertEqual(bits.GetByteSize(), 32) |
| |
| # Notice the pattern of int(b1.GetValue(), 0). We pass a base of 0 |
| # so that the proper radix is determined based on the contents of the |
| # string. |
| b1 = bits.GetChildMemberWithName("b1") |
| self.DebugSBValue(b1) |
| self.assertEqual(b1.GetName(), "b1") |
| self.assertEqual(b1.GetTypeName(), "uint32_t:1") |
| self.assertTrue(b1.IsInScope()) |
| self.assertEqual(int(b1.GetValue(), 0), 1) |
| |
| b7 = bits.GetChildMemberWithName("b7") |
| self.assertEqual(b7.GetName(), "b7") |
| self.assertEqual(b7.GetTypeName(), "uint32_t:7") |
| self.assertTrue(b7.IsInScope()) |
| self.assertEqual(int(b7.GetValue(), 0), 127) |
| |
| four = bits.GetChildMemberWithName("four") |
| self.assertEqual(four.GetName(), "four") |
| self.assertEqual(four.GetTypeName(), "uint32_t:4") |
| self.assertTrue(four.IsInScope()) |
| self.assertEqual(int(four.GetValue(), 0), 15) |
