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https://github.com/Gericom/teak-llvm.git
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fcaf5f6c01
We ran into an assert when debugging clang and performing an expression on a class derived from DeclContext. The assert was indicating we were getting the offsets wrong for RecordDeclBitfields. We were getting both the size and offset of unnamed bit-field members wrong. We could fix this case with a quick change but as I extended the test suite to include more combinations we kept finding more cases that were being handled incorrectly. A fix that handled all the new cases as well as the cases already covered required a refactor of the existing technique. Differential Revision: https://reviews.llvm.org/D72953
106 lines
3.6 KiB
Python
106 lines
3.6 KiB
Python
"""Show bitfields and check that they display correctly."""
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class CppBitfieldsTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number to break inside main().
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self.line = line_number('main.cpp', '// Set break point at this line.')
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# BitFields exhibit crashes in record layout on Windows
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# (http://llvm.org/pr21800)
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@skipIfWindows
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def test_and_run_command(self):
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"""Test 'frame variable ...' on a variable with bitfields."""
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self.build()
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lldbutil.run_to_source_breakpoint(self, '// Set break point at this line.',
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lldb.SBFileSpec("main.cpp", False))
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# The stop reason of the thread should be breakpoint.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs=['stopped',
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'stop reason = breakpoint'])
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# The breakpoint should have a hit count of 1.
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self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
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substrs=[' resolved, hit count = 1'])
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self.expect("expr (lba.a)", VARIABLES_DISPLAYED_CORRECTLY,
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substrs=['unsigned int', '2'])
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self.expect("expr (lbb.b)", VARIABLES_DISPLAYED_CORRECTLY,
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substrs=['unsigned int', '3'])
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self.expect("expr (lbc.c)", VARIABLES_DISPLAYED_CORRECTLY,
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substrs=['unsigned int', '4'])
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self.expect("expr (lbd.a)", VARIABLES_DISPLAYED_CORRECTLY,
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substrs=['unsigned int', '5'])
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self.expect("expr (clang_example.f.a)", VARIABLES_DISPLAYED_CORRECTLY,
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substrs=['uint64_t', '1'])
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self.expect(
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"frame variable --show-types lba",
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VARIABLES_DISPLAYED_CORRECTLY,
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substrs=[
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'(int:32) = ',
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'(unsigned int:20) a = 2',
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])
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self.expect(
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"frame variable --show-types lbb",
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VARIABLES_DISPLAYED_CORRECTLY,
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substrs=[
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'(unsigned int:1) a = 1',
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'(int:31) =',
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'(unsigned int:20) b = 3',
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])
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self.expect(
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"frame variable --show-types lbc",
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VARIABLES_DISPLAYED_CORRECTLY,
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substrs=[
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'(int:22) =',
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'(unsigned int:1) a = 1',
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'(unsigned int:1) b = 0',
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'(unsigned int:5) c = 4',
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'(unsigned int:1) d = 1',
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'(int:2) =',
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'(unsigned int:20) e = 20',
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])
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self.expect(
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"frame variable --show-types lbd",
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VARIABLES_DISPLAYED_CORRECTLY,
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substrs=[
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'(char [3]) arr = "abc"',
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'(int:32) =',
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'(unsigned int:20) a = 5',
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])
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self.expect(
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"frame variable --show-types clang_example",
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VARIABLES_DISPLAYED_CORRECTLY,
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substrs=[
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'(int:22) =',
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'(uint64_t:1) a = 1',
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'(uint64_t:1) b = 0',
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'(uint64_t:1) c = 1',
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'(uint64_t:1) d = 0',
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'(uint64_t:1) e = 1',
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'(uint64_t:1) f = 0',
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'(uint64_t:1) g = 1',
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'(uint64_t:1) h = 0',
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'(uint64_t:1) i = 1',
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'(uint64_t:1) j = 0',
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'(uint64_t:1) k = 1',
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])
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