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"""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 BitfieldsTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break inside main().
self.line = line_number('main.c', '// Set break point at this line.')
# BitFields exhibit crashes in record layout on Windows
# (http://llvm.org/pr21800)
@skipIfWindows
def test_and_run_command(self):
"""Test 'frame variable ...' on a variable with bitfields."""
self.build()
exe = self.getBuildArtifact("a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Break inside the main.
lldbutil.run_break_set_by_file_and_line(
self, "main.c", self.line, num_expected_locations=1, loc_exact=True)
self.runCmd("run", RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint.
self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
substrs=['stopped',
'stop reason = breakpoint'])
# The breakpoint should have a hit count of 1.
self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
substrs=[' resolved, hit count = 1'])
# This should display correctly.
self.expect(
"frame variable --show-types bits",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(uint32_t:1) b1 = 1',
'(uint32_t:2) b2 = 3',
'(uint32_t:3) b3 = 7',
'(uint32_t) b4 = 15',
'(uint32_t:5) b5 = 31',
'(uint32_t:6) b6 = 63',
'(uint32_t:7) b7 = 127',
'(uint32_t:4) four = 15'])
# And so should this.
# rdar://problem/8348251
self.expect(
"frame variable --show-types",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(uint32_t:1) b1 = 1',
'(uint32_t:2) b2 = 3',
'(uint32_t:3) b3 = 7',
'(uint32_t) b4 = 15',
'(uint32_t:5) b5 = 31',
'(uint32_t:6) b6 = 63',
'(uint32_t:7) b7 = 127',
'(uint32_t:4) four = 15'])
self.expect("expr (bits.b1)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '1'])
self.expect("expr (bits.b2)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '3'])
self.expect("expr (bits.b3)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '7'])
self.expect("expr (bits.b4)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '15'])
self.expect("expr (bits.b5)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '31'])
self.expect("expr (bits.b6)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '63'])
self.expect("expr (bits.b7)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '127'])
self.expect("expr (bits.four)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '15'])
self.expect(
"frame variable --show-types more_bits",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(uint32_t:3) a = 3',
'(uint8_t:1) b = \'\\0\'',
'(uint8_t:1) c = \'\\x01\'',
'(uint8_t:1) d = \'\\0\''])
self.expect("expr (more_bits.a)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', '3'])
self.expect("expr (more_bits.b)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint8_t', '\\0'])
self.expect("expr (more_bits.c)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint8_t', '\\x01'])
self.expect("expr (more_bits.d)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint8_t', '\\0'])
self.expect("expr (packed.a)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['char', "'a'"])
self.expect("expr (packed.b)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', "10"])
self.expect("expr/x (packed.c)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint32_t', "7112233"])
for bit in range(1,18):
expected = "1" if bit in [1, 5, 7, 13] else "0"
self.expect("expr even_more_bits.b" + str(bit), VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint8_t', expected])
for bit in [3, 10, 14]:
self.expect("expr even_more_bits.b" + str(bit) + " = 1", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint8_t', "1"])
self.expect(
"frame variable --show-types even_more_bits",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(uint8_t:1) b1 = \'\\x01\'',
'(uint8_t:1) b2 = \'\\0\'',
'(uint8_t:1) b3 = \'\\x01\'',
'(uint8_t:1) b4 = \'\\0\'',
'(uint8_t:1) b5 = \'\\x01\'',
'(uint8_t:1) b6 = \'\\0\'',
'(uint8_t:1) b7 = \'\\x01\'',
'(uint8_t:1) b8 = \'\\0\'',
'(uint8_t:1) b9 = \'\\0\'',
'(uint8_t:1) b10 = \'\\x01\'',
'(uint8_t:1) b12 = \'\\0\'',
'(uint8_t:1) b13 = \'\\x01\'',
'(uint8_t:1) b14 = \'\\x01\'',
'(uint8_t:1) b15 = \'\\0\'',
'(uint8_t:1) b16 = \'\\0\'',
'(uint8_t:1) b17 = \'\\0\'',
])
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.build()
exe = self.getBuildArtifact("a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByLocation("main.c", self.line)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
process = target.LaunchSimple(
None, None, self.get_process_working_directory())
self.assertTrue(process, PROCESS_IS_VALID)
# The stop reason of the thread should be breakpoint.
thread = lldbutil.get_stopped_thread(
process, lldb.eStopReasonBreakpoint)
self.assertIsNotNone(thread)
# The breakpoint should have a hit count of 1.
self.assertEqual(breakpoint.GetHitCount(), 1, BREAKPOINT_HIT_ONCE)
# Lookup the "bits" variable which contains 8 bitfields.
frame = thread.GetFrameAtIndex(0)
bits = frame.FindVariable("bits")
self.DebugSBValue(bits)
self.assertTrue(
bits.GetTypeName() == 'Bits',
"bits.GetTypeName() == 'Bits'")
self.assertTrue(
bits.GetNumChildren() == 10,
"bits.GetNumChildren() == 10")
test_compiler = self.getCompiler()
self.assertTrue(bits.GetByteSize() == 32, "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.assertTrue(b1.GetName() == "b1" and
b1.GetTypeName() == "uint32_t:1" and
b1.IsInScope() and
int(b1.GetValue(), 0) == 1,
'bits.b1 has type uint32_t:1, is in scope, and == 1')
b7 = bits.GetChildMemberWithName("b7")
self.DebugSBValue(b7)
self.assertTrue(b7.GetName() == "b7" and
b7.GetTypeName() == "uint32_t:7" and
b7.IsInScope() and
int(b7.GetValue(), 0) == 127,
'bits.b7 has type uint32_t:7, is in scope, and == 127')
four = bits.GetChildMemberWithName("four")
self.DebugSBValue(four)
self.assertTrue(four.GetName() == "four" and
four.GetTypeName() == "uint32_t:4" and
four.IsInScope() and
int(four.GetValue(), 0) == 15,
'bits.four has type uint32_t:4, is in scope, and == 15')
# Now kill the process, and we are done.
rc = target.GetProcess().Kill()
self.assertTrue(rc.Success())
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