TestCppBitfields.py
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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 CppBitfieldsTestCase(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.cpp', '// 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()
lldbutil.run_to_source_breakpoint(self, '// Set break point at this line.',
lldb.SBFileSpec("main.cpp", False))
# 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'])
self.expect("expr (lba.a)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['unsigned int', '2'])
self.expect("expr (lbb.b)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['unsigned int', '3'])
self.expect("expr (lbc.c)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['unsigned int', '4'])
self.expect("expr (lbd.a)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['unsigned int', '5'])
self.expect("expr (clang_example.f.a)", VARIABLES_DISPLAYED_CORRECTLY,
substrs=['uint64_t', '1'])
self.expect(
"frame variable --show-types lba",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(int:32) = ',
'(unsigned int:20) a = 2',
])
self.expect(
"frame variable --show-types lbb",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(unsigned int:1) a = 1',
'(int:31) =',
'(unsigned int:20) b = 3',
])
self.expect(
"frame variable --show-types lbc",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(int:22) =',
'(unsigned int:1) a = 1',
'(unsigned int:1) b = 0',
'(unsigned int:5) c = 4',
'(unsigned int:1) d = 1',
'(int:2) =',
'(unsigned int:20) e = 20',
])
self.expect(
"frame variable --show-types lbd",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(char [3]) arr = "ab"',
'(int:32) =',
'(unsigned int:20) a = 5',
])
self.expect(
"frame variable --show-types clang_example",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(int:22) =',
'(uint64_t:1) a = 1',
'(uint64_t:1) b = 0',
'(uint64_t:1) c = 1',
'(uint64_t:1) d = 0',
'(uint64_t:1) e = 1',
'(uint64_t:1) f = 0',
'(uint64_t:1) g = 1',
'(uint64_t:1) h = 0',
'(uint64_t:1) i = 1',
'(uint64_t:1) j = 0',
'(uint64_t:1) k = 1',
])
self.expect(
"frame variable --show-types derived",
VARIABLES_DISPLAYED_CORRECTLY,
substrs=[
'(uint32_t) b_a = 2',
'(uint32_t:1) d_a = 1',
])