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[3.12] gh-109972: Enhance test_gdb (GH-110026) (GH-110351) * gh-109972: Enhance test_gdb (GH-110026) * Split test_pycfunction.py: add test_cfunction_full.py. Split the function into the following 6 functions. In verbose mode, these "pycfunction" tests now log each tested call. * test_pycfunction_noargs() * test_pycfunction_o() * test_pycfunction_varargs() * test_pycfunction_varargs_keywords() * test_pycfunction_fastcall() * test_pycfunction_fastcall_keywords() * Move get_gdb_repr() to PrettyPrintTests. * Replace DebuggerTests.get_sample_script() with SAMPLE_SCRIPT. * Rename checkout_hook_path to CHECKOUT_HOOK_PATH. * Rename gdb_version to GDB_VERSION_TEXT. * Replace (gdb_major_version, gdb_minor_version) with GDB_VERSION. * run_gdb() uses "backslashreplace" error handler instead of "replace". * Add check_gdb() function to util.py. * Enhance support.check_cflags_pgo(): check also for sysconfig PGO_PROF_USE_FLAG (if available) in compiler flags. * Move some SkipTest checks to test_gdb/__init__.py. * Elaborate why gdb cannot be tested on Windows: gdb doesn't support PDB debug symbol files. (cherry picked from commit757cbd4f29) * gh-104736: Fix test_gdb tests on ppc64le with clang (GH-109360) Fix test_gdb on Python built with LLVM clang 16 on Linux ppc64le (ex: Fedora 38). Search patterns in gdb "bt" command output to detect when gdb fails to retrieve the traceback. For example, skip a test if "Backtrace stopped: frame did not save the PC" is found. (cherry picked from commit44d9a71ea2) * gh-110166: Fix gdb CFunctionFullTests on ppc64le clang build (GH-110331) CFunctionFullTests now also runs "bt" command before "py-bt-full", similar to CFunctionTests which also runs "bt" command before "py-bt". So test_gdb can skip the test if patterns like "?? ()" are found in the gdb output. (cherry picked from commitbbce8bd05d) Co-authored-by: Victor Stinner <vstinner@python.org> (cherry picked from commit1de9406f91) Co-authored-by: Victor Stinner <vstinner@python.org>
85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
import textwrap
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import unittest
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from test import support
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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(support.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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def check(self, func_name, cmd):
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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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# 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 check_pycfunction(self, func_name, args):
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'Verify that "py-bt" displays invocations of PyCFunction instances'
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if support.verbose:
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print()
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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 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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call = f'{obj}.{func_name}({args})'
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cmd = textwrap.dedent(f'''
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import _testcapi
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def foo():
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{call}
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def bar():
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foo()
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bar()
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''')
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if support.verbose:
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print(f' test call: {call}', flush=True)
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self.check(func_name, cmd)
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def test_pycfunction_noargs(self):
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self.check_pycfunction('meth_noargs', '')
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def test_pycfunction_o(self):
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self.check_pycfunction('meth_o', '[]')
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def test_pycfunction_varargs(self):
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self.check_pycfunction('meth_varargs', '')
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def test_pycfunction_varargs_keywords(self):
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self.check_pycfunction('meth_varargs_keywords', '')
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def test_pycfunction_fastcall(self):
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self.check_pycfunction('meth_fastcall', '')
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def test_pycfunction_fastcall_keywords(self):
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self.check_pycfunction('meth_fastcall_keywords', '')
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