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757cbd4f29
* 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.
438 lines
17 KiB
Python
438 lines
17 KiB
Python
import re
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import sys
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from test import support
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from .util import (
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BREAKPOINT_FN, GDB_VERSION,
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run_gdb, setup_module, DebuggerTests)
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def setUpModule():
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setup_module()
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class PrettyPrintTests(DebuggerTests):
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def get_gdb_repr(self, source,
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cmds_after_breakpoint=None,
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import_site=False):
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# Given an input python source representation of data,
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# run "python -c'id(DATA)'" under gdb with a breakpoint on
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# builtin_id and scrape out gdb's representation of the "op"
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# parameter, and verify that the gdb displays the same string
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#
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# Verify that the gdb displays the expected string
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#
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# For a nested structure, the first time we hit the breakpoint will
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# give us the top-level structure
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# NOTE: avoid decoding too much of the traceback as some
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# undecodable characters may lurk there in optimized mode
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# (issue #19743).
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cmds_after_breakpoint = cmds_after_breakpoint or ["backtrace 1"]
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gdb_output = self.get_stack_trace(source, breakpoint=BREAKPOINT_FN,
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cmds_after_breakpoint=cmds_after_breakpoint,
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import_site=import_site)
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# gdb can insert additional '\n' and space characters in various places
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# in its output, depending on the width of the terminal it's connected
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# to (using its "wrap_here" function)
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m = re.search(
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# Match '#0 builtin_id(self=..., v=...)'
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r'#0\s+builtin_id\s+\(self\=.*,\s+v=\s*(.*?)?\)'
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# Match ' at Python/bltinmodule.c'.
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# bpo-38239: builtin_id() is defined in Python/bltinmodule.c,
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# but accept any "Directory\file.c" to support Link Time
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# Optimization (LTO).
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r'\s+at\s+\S*[A-Za-z]+/[A-Za-z0-9_-]+\.c',
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gdb_output, re.DOTALL)
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if not m:
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self.fail('Unexpected gdb output: %r\n%s' % (gdb_output, gdb_output))
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return m.group(1), gdb_output
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def test_getting_backtrace(self):
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gdb_output = self.get_stack_trace('id(42)')
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self.assertTrue(BREAKPOINT_FN in gdb_output)
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def assertGdbRepr(self, val, exp_repr=None):
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# Ensure that gdb's rendering of the value in a debugged process
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# matches repr(value) in this process:
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gdb_repr, gdb_output = self.get_gdb_repr('id(' + ascii(val) + ')')
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if not exp_repr:
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exp_repr = repr(val)
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self.assertEqual(gdb_repr, exp_repr,
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('%r did not equal expected %r; full output was:\n%s'
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% (gdb_repr, exp_repr, gdb_output)))
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@support.requires_resource('cpu')
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def test_int(self):
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'Verify the pretty-printing of various int values'
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self.assertGdbRepr(42)
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self.assertGdbRepr(0)
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self.assertGdbRepr(-7)
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self.assertGdbRepr(1000000000000)
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self.assertGdbRepr(-1000000000000000)
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def test_singletons(self):
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'Verify the pretty-printing of True, False and None'
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self.assertGdbRepr(True)
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self.assertGdbRepr(False)
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self.assertGdbRepr(None)
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def test_dicts(self):
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'Verify the pretty-printing of dictionaries'
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self.assertGdbRepr({})
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self.assertGdbRepr({'foo': 'bar'}, "{'foo': 'bar'}")
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# Python preserves insertion order since 3.6
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self.assertGdbRepr({'foo': 'bar', 'douglas': 42}, "{'foo': 'bar', 'douglas': 42}")
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def test_lists(self):
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'Verify the pretty-printing of lists'
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self.assertGdbRepr([])
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self.assertGdbRepr(list(range(5)))
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@support.requires_resource('cpu')
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def test_bytes(self):
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'Verify the pretty-printing of bytes'
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self.assertGdbRepr(b'')
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self.assertGdbRepr(b'And now for something hopefully the same')
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self.assertGdbRepr(b'string with embedded NUL here \0 and then some more text')
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self.assertGdbRepr(b'this is a tab:\t'
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b' this is a slash-N:\n'
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b' this is a slash-R:\r'
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)
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self.assertGdbRepr(b'this is byte 255:\xff and byte 128:\x80')
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self.assertGdbRepr(bytes([b for b in range(255)]))
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@support.requires_resource('cpu')
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def test_strings(self):
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'Verify the pretty-printing of unicode strings'
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# We cannot simply call locale.getpreferredencoding() here,
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# as GDB might have been linked against a different version
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# of Python with a different encoding and coercion policy
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# with respect to PEP 538 and PEP 540.
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stdout, stderr = run_gdb(
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'--eval-command',
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'python import locale; print(locale.getpreferredencoding())')
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encoding = stdout
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if stderr or not encoding:
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raise RuntimeError(
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f'unable to determine the Python locale preferred encoding '
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f'of embedded Python in GDB\n'
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f'stdout={stdout!r}\n'
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f'stderr={stderr!r}')
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def check_repr(text):
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try:
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text.encode(encoding)
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except UnicodeEncodeError:
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self.assertGdbRepr(text, ascii(text))
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else:
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self.assertGdbRepr(text)
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self.assertGdbRepr('')
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self.assertGdbRepr('And now for something hopefully the same')
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self.assertGdbRepr('string with embedded NUL here \0 and then some more text')
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# Test printing a single character:
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# U+2620 SKULL AND CROSSBONES
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check_repr('\u2620')
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# Test printing a Japanese unicode string
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# (I believe this reads "mojibake", using 3 characters from the CJK
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# Unified Ideographs area, followed by U+3051 HIRAGANA LETTER KE)
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check_repr('\u6587\u5b57\u5316\u3051')
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# Test a character outside the BMP:
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# U+1D121 MUSICAL SYMBOL C CLEF
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# This is:
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# UTF-8: 0xF0 0x9D 0x84 0xA1
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# UTF-16: 0xD834 0xDD21
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check_repr(chr(0x1D121))
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def test_tuples(self):
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'Verify the pretty-printing of tuples'
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self.assertGdbRepr(tuple(), '()')
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self.assertGdbRepr((1,), '(1,)')
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self.assertGdbRepr(('foo', 'bar', 'baz'))
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@support.requires_resource('cpu')
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def test_sets(self):
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'Verify the pretty-printing of sets'
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if GDB_VERSION < (7, 3):
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self.skipTest("pretty-printing of sets needs gdb 7.3 or later")
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self.assertGdbRepr(set(), "set()")
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self.assertGdbRepr(set(['a']), "{'a'}")
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# PYTHONHASHSEED is need to get the exact frozenset item order
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if not sys.flags.ignore_environment:
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self.assertGdbRepr(set(['a', 'b']), "{'a', 'b'}")
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self.assertGdbRepr(set([4, 5, 6]), "{4, 5, 6}")
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# Ensure that we handle sets containing the "dummy" key value,
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# which happens on deletion:
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gdb_repr, gdb_output = self.get_gdb_repr('''s = set(['a','b'])
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s.remove('a')
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id(s)''')
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self.assertEqual(gdb_repr, "{'b'}")
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@support.requires_resource('cpu')
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def test_frozensets(self):
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'Verify the pretty-printing of frozensets'
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if GDB_VERSION < (7, 3):
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self.skipTest("pretty-printing of frozensets needs gdb 7.3 or later")
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self.assertGdbRepr(frozenset(), "frozenset()")
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self.assertGdbRepr(frozenset(['a']), "frozenset({'a'})")
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# PYTHONHASHSEED is need to get the exact frozenset item order
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if not sys.flags.ignore_environment:
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self.assertGdbRepr(frozenset(['a', 'b']), "frozenset({'a', 'b'})")
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self.assertGdbRepr(frozenset([4, 5, 6]), "frozenset({4, 5, 6})")
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def test_exceptions(self):
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# Test a RuntimeError
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gdb_repr, gdb_output = self.get_gdb_repr('''
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try:
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raise RuntimeError("I am an error")
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except RuntimeError as e:
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id(e)
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''')
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self.assertEqual(gdb_repr,
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"RuntimeError('I am an error',)")
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# Test division by zero:
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gdb_repr, gdb_output = self.get_gdb_repr('''
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try:
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a = 1 / 0
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except ZeroDivisionError as e:
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id(e)
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''')
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self.assertEqual(gdb_repr,
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"ZeroDivisionError('division by zero',)")
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def test_modern_class(self):
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'Verify the pretty-printing of new-style class instances'
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gdb_repr, gdb_output = self.get_gdb_repr('''
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class Foo:
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pass
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foo = Foo()
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foo.an_int = 42
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id(foo)''')
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m = re.match(r'<Foo\(an_int=42\) at remote 0x-?[0-9a-f]+>', gdb_repr)
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self.assertTrue(m,
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msg='Unexpected new-style class rendering %r' % gdb_repr)
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def test_subclassing_list(self):
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'Verify the pretty-printing of an instance of a list subclass'
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gdb_repr, gdb_output = self.get_gdb_repr('''
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class Foo(list):
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pass
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foo = Foo()
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foo += [1, 2, 3]
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foo.an_int = 42
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id(foo)''')
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m = re.match(r'<Foo\(an_int=42\) at remote 0x-?[0-9a-f]+>', gdb_repr)
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self.assertTrue(m,
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msg='Unexpected new-style class rendering %r' % gdb_repr)
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def test_subclassing_tuple(self):
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'Verify the pretty-printing of an instance of a tuple subclass'
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# This should exercise the negative tp_dictoffset code in the
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# new-style class support
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gdb_repr, gdb_output = self.get_gdb_repr('''
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class Foo(tuple):
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pass
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foo = Foo((1, 2, 3))
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foo.an_int = 42
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id(foo)''')
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m = re.match(r'<Foo\(an_int=42\) at remote 0x-?[0-9a-f]+>', gdb_repr)
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self.assertTrue(m,
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msg='Unexpected new-style class rendering %r' % gdb_repr)
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def assertSane(self, source, corruption, exprepr=None):
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'''Run Python under gdb, corrupting variables in the inferior process
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immediately before taking a backtrace.
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Verify that the variable's representation is the expected failsafe
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representation'''
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if corruption:
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cmds_after_breakpoint=[corruption, 'backtrace']
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else:
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cmds_after_breakpoint=['backtrace']
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gdb_repr, gdb_output = \
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self.get_gdb_repr(source,
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cmds_after_breakpoint=cmds_after_breakpoint)
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if exprepr:
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if gdb_repr == exprepr:
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# gdb managed to print the value in spite of the corruption;
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# this is good (see http://bugs.python.org/issue8330)
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return
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# Match anything for the type name; 0xDEADBEEF could point to
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# something arbitrary (see http://bugs.python.org/issue8330)
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pattern = '<.* at remote 0x-?[0-9a-f]+>'
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m = re.match(pattern, gdb_repr)
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if not m:
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self.fail('Unexpected gdb representation: %r\n%s' % \
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(gdb_repr, gdb_output))
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def test_NULL_ptr(self):
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'Ensure that a NULL PyObject* is handled gracefully'
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gdb_repr, gdb_output = (
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self.get_gdb_repr('id(42)',
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cmds_after_breakpoint=['set variable v=0',
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'backtrace'])
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)
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self.assertEqual(gdb_repr, '0x0')
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def test_NULL_ob_type(self):
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'Ensure that a PyObject* with NULL ob_type is handled gracefully'
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self.assertSane('id(42)',
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'set v->ob_type=0')
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def test_corrupt_ob_type(self):
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'Ensure that a PyObject* with a corrupt ob_type is handled gracefully'
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self.assertSane('id(42)',
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'set v->ob_type=0xDEADBEEF',
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exprepr='42')
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def test_corrupt_tp_flags(self):
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'Ensure that a PyObject* with a type with corrupt tp_flags is handled'
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self.assertSane('id(42)',
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'set v->ob_type->tp_flags=0x0',
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exprepr='42')
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def test_corrupt_tp_name(self):
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'Ensure that a PyObject* with a type with corrupt tp_name is handled'
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self.assertSane('id(42)',
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'set v->ob_type->tp_name=0xDEADBEEF',
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exprepr='42')
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def test_builtins_help(self):
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'Ensure that the new-style class _Helper in site.py can be handled'
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if sys.flags.no_site:
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self.skipTest("need site module, but -S option was used")
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# (this was the issue causing tracebacks in
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# http://bugs.python.org/issue8032#msg100537 )
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gdb_repr, gdb_output = self.get_gdb_repr('id(__builtins__.help)', import_site=True)
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m = re.match(r'<_Helper\(\) at remote 0x-?[0-9a-f]+>', gdb_repr)
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self.assertTrue(m,
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msg='Unexpected rendering %r' % gdb_repr)
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def test_selfreferential_list(self):
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'''Ensure that a reference loop involving a list doesn't lead proxyval
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into an infinite loop:'''
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gdb_repr, gdb_output = \
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self.get_gdb_repr("a = [3, 4, 5] ; a.append(a) ; id(a)")
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self.assertEqual(gdb_repr, '[3, 4, 5, [...]]')
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gdb_repr, gdb_output = \
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self.get_gdb_repr("a = [3, 4, 5] ; b = [a] ; a.append(b) ; id(a)")
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self.assertEqual(gdb_repr, '[3, 4, 5, [[...]]]')
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def test_selfreferential_dict(self):
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'''Ensure that a reference loop involving a dict doesn't lead proxyval
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into an infinite loop:'''
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gdb_repr, gdb_output = \
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self.get_gdb_repr("a = {} ; b = {'bar':a} ; a['foo'] = b ; id(a)")
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self.assertEqual(gdb_repr, "{'foo': {'bar': {...}}}")
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def test_selfreferential_old_style_instance(self):
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gdb_repr, gdb_output = \
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self.get_gdb_repr('''
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class Foo:
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pass
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foo = Foo()
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foo.an_attr = foo
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id(foo)''')
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self.assertTrue(re.match(r'<Foo\(an_attr=<\.\.\.>\) at remote 0x-?[0-9a-f]+>',
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gdb_repr),
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'Unexpected gdb representation: %r\n%s' % \
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(gdb_repr, gdb_output))
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def test_selfreferential_new_style_instance(self):
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gdb_repr, gdb_output = \
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self.get_gdb_repr('''
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class Foo(object):
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pass
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foo = Foo()
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foo.an_attr = foo
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id(foo)''')
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self.assertTrue(re.match(r'<Foo\(an_attr=<\.\.\.>\) at remote 0x-?[0-9a-f]+>',
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gdb_repr),
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'Unexpected gdb representation: %r\n%s' % \
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(gdb_repr, gdb_output))
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gdb_repr, gdb_output = \
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self.get_gdb_repr('''
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class Foo(object):
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pass
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a = Foo()
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b = Foo()
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a.an_attr = b
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b.an_attr = a
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id(a)''')
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self.assertTrue(re.match(r'<Foo\(an_attr=<Foo\(an_attr=<\.\.\.>\) at remote 0x-?[0-9a-f]+>\) at remote 0x-?[0-9a-f]+>',
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gdb_repr),
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'Unexpected gdb representation: %r\n%s' % \
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(gdb_repr, gdb_output))
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def test_truncation(self):
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'Verify that very long output is truncated'
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gdb_repr, gdb_output = self.get_gdb_repr('id(list(range(1000)))')
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self.assertEqual(gdb_repr,
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"[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, "
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"14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, "
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"27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, "
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"40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, "
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"53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, "
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"66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, "
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"79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, "
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"92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, "
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"104, 105, 106, 107, 108, 109, 110, 111, 112, 113, "
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"114, 115, 116, 117, 118, 119, 120, 121, 122, 123, "
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"124, 125, 126, 127, 128, 129, 130, 131, 132, 133, "
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"134, 135, 136, 137, 138, 139, 140, 141, 142, 143, "
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"144, 145, 146, 147, 148, 149, 150, 151, 152, 153, "
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"154, 155, 156, 157, 158, 159, 160, 161, 162, 163, "
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"164, 165, 166, 167, 168, 169, 170, 171, 172, 173, "
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"174, 175, 176, 177, 178, 179, 180, 181, 182, 183, "
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"184, 185, 186, 187, 188, 189, 190, 191, 192, 193, "
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"194, 195, 196, 197, 198, 199, 200, 201, 202, 203, "
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"204, 205, 206, 207, 208, 209, 210, 211, 212, 213, "
|
|
"214, 215, 216, 217, 218, 219, 220, 221, 222, 223, "
|
|
"224, 225, 226...(truncated)")
|
|
self.assertEqual(len(gdb_repr),
|
|
1024 + len('...(truncated)'))
|
|
|
|
def test_builtin_method(self):
|
|
gdb_repr, gdb_output = self.get_gdb_repr('import sys; id(sys.stdout.readlines)')
|
|
self.assertTrue(re.match(r'<built-in method readlines of _io.TextIOWrapper object at remote 0x-?[0-9a-f]+>',
|
|
gdb_repr),
|
|
'Unexpected gdb representation: %r\n%s' % \
|
|
(gdb_repr, gdb_output))
|
|
|
|
def test_frames(self):
|
|
gdb_output = self.get_stack_trace('''
|
|
import sys
|
|
def foo(a, b, c):
|
|
return sys._getframe(0)
|
|
|
|
f = foo(3, 4, 5)
|
|
id(f)''',
|
|
breakpoint='builtin_id',
|
|
cmds_after_breakpoint=['print (PyFrameObject*)v']
|
|
)
|
|
self.assertTrue(re.match(r'.*\s+\$1 =\s+Frame 0x-?[0-9a-f]+, for file <string>, line 4, in foo \(a=3.*',
|
|
gdb_output,
|
|
re.DOTALL),
|
|
'Unexpected gdb representation: %r\n%s' % (gdb_output, gdb_output))
|