mirror of https://github.com/python/cpython.git
84 lines
3.3 KiB
Python
84 lines
3.3 KiB
Python
import re
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import textwrap
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import unittest
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from test import support
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from test.support import python_is_optimized
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from .util import setup_module, DebuggerTests
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def setUpModule():
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setup_module()
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@unittest.skipIf(python_is_optimized(),
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"Python was compiled with optimizations")
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@support.requires_resource('cpu')
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class CFunctionTests(DebuggerTests):
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# Some older versions of gdb will fail with
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# "Cannot find new threads: generic error"
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# unless we add LD_PRELOAD=PATH-TO-libpthread.so.1 as a workaround
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#
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# gdb will also generate many erroneous errors such as:
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# Function "meth_varargs" not defined.
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# This is because we are calling functions from an "external" module
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# (_testcapimodule) rather than compiled-in functions. It seems difficult
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# to suppress these. See also the comment in DebuggerTests.get_stack_trace
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def test_pycfunction(self):
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'Verify that "py-bt" displays invocations of PyCFunction instances'
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# bpo-46600: If the compiler inlines _null_to_none() in meth_varargs()
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# (ex: clang -Og), _null_to_none() is the frame #1. Otherwise,
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# meth_varargs() is the frame #1.
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expected_frame = r'#(1|2)'
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# Various optimizations multiply the code paths by which these are
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# called, so test a variety of calling conventions.
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for func_name, args in (
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('meth_varargs', ''),
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('meth_varargs_keywords', ''),
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('meth_o', '[]'),
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('meth_noargs', ''),
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('meth_fastcall', ''),
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('meth_fastcall_keywords', ''),
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):
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for obj in (
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'_testcapi',
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'_testcapi.MethClass',
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'_testcapi.MethClass()',
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'_testcapi.MethStatic()',
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# XXX: bound methods don't yet give nice tracebacks
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# '_testcapi.MethInstance()',
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):
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with self.subTest(f'{obj}.{func_name}'):
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cmd = textwrap.dedent(f'''
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import _testcapi
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def foo():
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{obj}.{func_name}({args})
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def bar():
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foo()
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bar()
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''')
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# Verify with "py-bt":
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gdb_output = self.get_stack_trace(
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cmd,
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breakpoint=func_name,
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cmds_after_breakpoint=['bt', 'py-bt'],
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# bpo-45207: Ignore 'Function "meth_varargs" not
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# defined.' message in stderr.
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ignore_stderr=True,
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)
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self.assertIn(f'<built-in method {func_name}', gdb_output)
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# Verify with "py-bt-full":
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gdb_output = self.get_stack_trace(
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cmd,
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breakpoint=func_name,
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cmds_after_breakpoint=['py-bt-full'],
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# bpo-45207: Ignore 'Function "meth_varargs" not
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# defined.' message in stderr.
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ignore_stderr=True,
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)
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regex = expected_frame
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regex += re.escape(f' <built-in method {func_name}')
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self.assertRegex(gdb_output, regex)
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