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Name	Size	Permission	Date
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test_fnmatch.py	4.69 KB	-rw-r--r--	2024-04-17 20:49
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test_xml_etree.py	115.41 KB	-rw-r--r--	2024-04-17 20:49
test_xml_etree_c.py	6.7 KB	-rw-r--r--	2024-04-17 20:49
test_xmlrpc.py	53.99 KB	-rw-r--r--	2024-04-17 20:49
test_xmlrpc_net.py	1015 B	-rw-r--r--	2024-04-17 20:49
test_yield_from.py	30.01 KB	-rw-r--r--	2024-04-17 20:49
test_zipapp.py	13.74 KB	-rw-r--r--	2024-04-17 20:49
test_zipfile.py	88.89 KB	-rw-r--r--	2024-04-17 20:49
test_zipfile64.py	5.72 KB	-rw-r--r--	2024-04-17 20:49
test_zipimport.py	28.43 KB	-rw-r--r--	2024-04-17 20:49
test_zipimport_support.py	10.46 KB	-rw-r--r--	2024-04-17 20:49
test_zlib.py	34.03 KB	-rw-r--r--	2024-04-17 20:49
testcodec.py	1.02 KB	-rw-r--r--	2024-04-17 20:49
testtar.tar	425 KB	-rw-r--r--	2021-09-04 08:19
tf_inherit_check.py	714 B	-rw-r--r--	2024-04-17 20:49
threaded_import_hangers.py	1.45 KB	-rw-r--r--	2024-04-17 20:49
time_hashlib.py	2.83 KB	-rw-r--r--	2024-04-17 20:49
tokenize_tests-latin1-coding-cookie-and-utf8-bom-sig.txt	444 B	-rw-r--r--	2021-09-04 08:19
tokenize_tests-no-coding-cookie-and-utf8-bom-sig-only.txt	303 B	-rw-r--r--	2021-09-04 08:19
tokenize_tests-utf8-coding-cookie-and-no-utf8-bom-sig.txt	421 B	-rw-r--r--	2021-09-04 08:19
tokenize_tests-utf8-coding-cookie-and-utf8-bom-sig.txt	327 B	-rw-r--r--	2021-09-04 08:19
tokenize_tests.txt	2.65 KB	-rw-r--r--	2021-09-04 08:19
win_console_handler.py	1.38 KB	-rw-r--r--	2024-04-17 20:49
xmltests.py	499 B	-rw-r--r--	2024-04-17 20:49
zip_cp437_header.zip	270 B	-rw-r--r--	2021-09-04 08:19
zipdir.zip	374 B	-rw-r--r--	2021-09-04 08:19

Rename

# Verify that gdb can pretty-print the various PyObject* types
#
# The code for testing gdb was adapted from similar work in Unladen Swallow's
# Lib/test/test_jit_gdb.py

import locale
import os
import platform
import re
import subprocess
import sys
import sysconfig
import textwrap
import unittest

# Is this Python configured to support threads?
try:
    import _thread
except ImportError:
    _thread = None

from test import support
from test.support import run_unittest, findfile, python_is_optimized

def get_gdb_version():
    try:
        proc = subprocess.Popen(["gdb", "-nx", "--version"],
                                stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE,
                                universal_newlines=True)
        with proc:
            version = proc.communicate()[0]
    except OSError:
        # This is what "no gdb" looks like.  There may, however, be other
        # errors that manifest this way too.
        raise unittest.SkipTest("Couldn't find gdb on the path")

# Regex to parse:
    # 'GNU gdb (GDB; SUSE Linux Enterprise 12) 7.7\n' -> 7.7
    # 'GNU gdb (GDB) Fedora 7.9.1-17.fc22\n' -> 7.9
    # 'GNU gdb 6.1.1 [FreeBSD]\n' -> 6.1
    # 'GNU gdb (GDB) Fedora (7.5.1-37.fc18)\n' -> 7.5
    match = re.search(r"^GNU gdb.*?\b(\d+)\.(\d+)", version)
    if match is None:
        raise Exception("unable to parse GDB version: %r" % version)
    return (version, int(match.group(1)), int(match.group(2)))

gdb_version, gdb_major_version, gdb_minor_version = get_gdb_version()
if gdb_major_version < 7:
    raise unittest.SkipTest("gdb versions before 7.0 didn't support python "
                            "embedding. Saw %s.%s:\n%s"
                            % (gdb_major_version, gdb_minor_version,
                               gdb_version))

if not sysconfig.is_python_build():
    raise unittest.SkipTest("test_gdb only works on source builds at the moment.")

if 'Clang' in platform.python_compiler() and sys.platform == 'darwin':
    raise unittest.SkipTest("test_gdb doesn't work correctly when python is"
                            " built with LLVM clang")

# Location of custom hooks file in a repository checkout.
checkout_hook_path = os.path.join(os.path.dirname(sys.executable),
                                  'python-gdb.py')

PYTHONHASHSEED = '123'

def cet_protection():
    cflags = sysconfig.get_config_var('CFLAGS')
    if not cflags:
        return False
    flags = cflags.split()
    # True if "-mcet -fcf-protection" options are found, but false
    # if "-fcf-protection=none" or "-fcf-protection=return" is found.
    return (('-mcet' in flags)
            and any((flag.startswith('-fcf-protection')
                     and not flag.endswith(("=none", "=return")))
                    for flag in flags))

# Control-flow enforcement technology
CET_PROTECTION = cet_protection()

def run_gdb(*args, **env_vars):
    """Runs gdb in --batch mode with the additional arguments given by *args.

Returns its (stdout, stderr) decoded from utf-8 using the replace handler.
    """
    if env_vars:
        env = os.environ.copy()
        env.update(env_vars)
    else:
        env = None
    # -nx: Do not execute commands from any .gdbinit initialization files
    #      (issue #22188)
    base_cmd = ('gdb', '--batch', '-nx')
    if (gdb_major_version, gdb_minor_version) >= (7, 4):
        base_cmd += ('-iex', 'add-auto-load-safe-path ' + checkout_hook_path)
    proc = subprocess.Popen(base_cmd + args,
                            # Redirect stdin to prevent GDB from messing with
                            # the terminal settings
                            stdin=subprocess.PIPE,
                            stdout=subprocess.PIPE,
                            stderr=subprocess.PIPE,
                            env=env)
    with proc:
        out, err = proc.communicate()
    return out.decode('utf-8', 'replace'), err.decode('utf-8', 'replace')

# Verify that "gdb" was built with the embedded python support enabled:
gdbpy_version, _ = run_gdb("--eval-command=python import sys; print(sys.version_info)")
if not gdbpy_version:
    raise unittest.SkipTest("gdb not built with embedded python support")

# Verify that "gdb" can load our custom hooks, as OS security settings may
# disallow this without a customized .gdbinit.
_, gdbpy_errors = run_gdb('--args', sys.executable)
if "auto-loading has been declined" in gdbpy_errors:
    msg = "gdb security settings prevent use of custom hooks: "
    raise unittest.SkipTest(msg + gdbpy_errors.rstrip())

def gdb_has_frame_select():
    # Does this build of gdb have gdb.Frame.select ?
    stdout, _ = run_gdb("--eval-command=python print(dir(gdb.Frame))")
    m = re.match(r'.*\[(.*)\].*', stdout)
    if not m:
        raise unittest.SkipTest("Unable to parse output from gdb.Frame.select test")
    gdb_frame_dir = m.group(1).split(', ')
    return "'select'" in gdb_frame_dir

HAS_PYUP_PYDOWN = gdb_has_frame_select()

BREAKPOINT_FN='builtin_id'

@unittest.skipIf(support.PGO, "not useful for PGO")
class DebuggerTests(unittest.TestCase):

"""Test that the debugger can debug Python."""

def get_stack_trace(self, source=None, script=None,
                        breakpoint=BREAKPOINT_FN,
                        cmds_after_breakpoint=None,
                        import_site=False):
        '''
        Run 'python -c SOURCE' under gdb with a breakpoint.

Support injecting commands after the breakpoint is reached

Returns the stdout from gdb

cmds_after_breakpoint: if provided, a list of strings: gdb commands
        '''
        # We use "set breakpoint pending yes" to avoid blocking with a:
        #   Function "foo" not defined.
        #   Make breakpoint pending on future shared library load? (y or [n])
        # error, which typically happens python is dynamically linked (the
        # breakpoints of interest are to be found in the shared library)
        # When this happens, we still get:
        #   Function "textiowrapper_write" not defined.
        # emitted to stderr each time, alas.

# Initially I had "--eval-command=continue" here, but removed it to
        # avoid repeated print breakpoints when traversing hierarchical data
        # structures

# Generate a list of commands in gdb's language:
        commands = ['set breakpoint pending yes',
                    'break %s' % breakpoint,

# The tests assume that the first frame of printed
                    #  backtrace will not contain program counter,
                    #  that is however not guaranteed by gdb
                    #  therefore we need to use 'set print address off' to
                    #  make sure the counter is not there. For example:
                    # #0 in PyObject_Print ...
                    #  is assumed, but sometimes this can be e.g.
                    # #0 0x00003fffb7dd1798 in PyObject_Print ...
                    'set print address off',

'run']

# GDB as of 7.4 onwards can distinguish between the
        # value of a variable at entry vs current value:
        #   http://sourceware.org/gdb/onlinedocs/gdb/Variables.html
        # which leads to the selftests failing with errors like this:
        #   AssertionError: 'v@entry=()' != '()'
        # Disable this:
        if (gdb_major_version, gdb_minor_version) >= (7, 4):
            commands += ['set print entry-values no']

if cmds_after_breakpoint:
            if CET_PROTECTION:
                # bpo-32962: When Python is compiled with -mcet
                # -fcf-protection, function arguments are unusable before
                # running the first instruction of the function entry point.
                # The 'next' command makes the required first step.
                commands += ['next']
            commands += cmds_after_breakpoint
        else:
            commands += ['backtrace']

# print commands

# Use "commands" to generate the arguments with which to invoke "gdb":
        args = ['--eval-command=%s' % cmd for cmd in commands]
        args += ["--args",
                 sys.executable]
        args.extend(subprocess._args_from_interpreter_flags())

if not import_site:
            # -S suppresses the default 'import site'
            args += ["-S"]

if source:
            args += ["-c", source]
        elif script:
            args += [script]

# print args
        # print (' '.join(args))

# Use "args" to invoke gdb, capturing stdout, stderr:
        out, err = run_gdb(*args, PYTHONHASHSEED=PYTHONHASHSEED)

errlines = err.splitlines()
        unexpected_errlines = []

# Ignore some benign messages on stderr.
        ignore_patterns = (
            'Function "%s" not defined.' % breakpoint,
            'Do you need "set solib-search-path" or '
            '"set sysroot"?',
            # BFD: /usr/lib/debug/(...): unable to initialize decompress
            # status for section .debug_aranges
            'BFD: ',
            # ignore all warnings
            'warning: ',
            )
        for line in errlines:
            if not line:
                continue
            # bpo34007: Sometimes some versions of the shared libraries that
            # are part of the traceback are compiled in optimised mode and the
            # Program Counter (PC) is not present, not allowing gdb to walk the
            # frames back. When this happens, the Python bindings of gdb raise
            # an exception, making the test impossible to succeed.
            if "PC not saved" in line:
                raise unittest.SkipTest("gdb cannot walk the frame object"
                                        " because the Program Counter is"
                                        " not present")
            if not line.startswith(ignore_patterns):
                unexpected_errlines.append(line)

# Ensure no unexpected error messages:
        self.assertEqual(unexpected_errlines, [])
        return out

def get_gdb_repr(self, source,
                     cmds_after_breakpoint=None,
                     import_site=False):
        # Given an input python source representation of data,
        # run "python -c'id(DATA)'" under gdb with a breakpoint on
        # builtin_id and scrape out gdb's representation of the "op"
        # parameter, and verify that the gdb displays the same string
        #
        # Verify that the gdb displays the expected string
        #
        # For a nested structure, the first time we hit the breakpoint will
        # give us the top-level structure

# NOTE: avoid decoding too much of the traceback as some
        # undecodable characters may lurk there in optimized mode
        # (issue #19743).
        cmds_after_breakpoint = cmds_after_breakpoint or ["backtrace 1"]
        gdb_output = self.get_stack_trace(source, breakpoint=BREAKPOINT_FN,
                                          cmds_after_breakpoint=cmds_after_breakpoint,
                                          import_site=import_site)
        # gdb can insert additional '\n' and space characters in various places
        # in its output, depending on the width of the terminal it's connected
        # to (using its "wrap_here" function)
        m = re.match(r'.*#0\s+builtin_id\s+$self\=.*,\s+v=\s*(.*?)$\s+at\s+\S*Python/bltinmodule.c.*',
                     gdb_output, re.DOTALL)
        if not m:
            self.fail('Unexpected gdb output: %r\n%s' % (gdb_output, gdb_output))
        return m.group(1), gdb_output

def assertEndsWith(self, actual, exp_end):
        '''Ensure that the given "actual" string ends with "exp_end"'''
        self.assertTrue(actual.endswith(exp_end),
                        msg='%r did not end with %r' % (actual, exp_end))

def assertMultilineMatches(self, actual, pattern):
        m = re.match(pattern, actual, re.DOTALL)
        if not m:
            self.fail(msg='%r did not match %r' % (actual, pattern))

def get_sample_script(self):
        return findfile('gdb_sample.py')

class PrettyPrintTests(DebuggerTests):
    def test_getting_backtrace(self):
        gdb_output = self.get_stack_trace('id(42)')
        self.assertTrue(BREAKPOINT_FN in gdb_output)

def assertGdbRepr(self, val, exp_repr=None):
        # Ensure that gdb's rendering of the value in a debugged process
        # matches repr(value) in this process:
        gdb_repr, gdb_output = self.get_gdb_repr('id(' + ascii(val) + ')')
        if not exp_repr:
            exp_repr = repr(val)
        self.assertEqual(gdb_repr, exp_repr,
                         ('%r did not equal expected %r; full output was:\n%s'
                          % (gdb_repr, exp_repr, gdb_output)))

def test_int(self):
        'Verify the pretty-printing of various int values'
        self.assertGdbRepr(42)
        self.assertGdbRepr(0)
        self.assertGdbRepr(-7)
        self.assertGdbRepr(1000000000000)
        self.assertGdbRepr(-1000000000000000)

def test_singletons(self):
        'Verify the pretty-printing of True, False and None'
        self.assertGdbRepr(True)
        self.assertGdbRepr(False)
        self.assertGdbRepr(None)

def test_dicts(self):
        'Verify the pretty-printing of dictionaries'
        self.assertGdbRepr({})
        self.assertGdbRepr({'foo': 'bar'}, "{'foo': 'bar'}")
        # Python preserves insertion order since 3.6
        self.assertGdbRepr({'foo': 'bar', 'douglas': 42}, "{'foo': 'bar', 'douglas': 42}")

def test_lists(self):
        'Verify the pretty-printing of lists'
        self.assertGdbRepr([])
        self.assertGdbRepr(list(range(5)))

def test_bytes(self):
        'Verify the pretty-printing of bytes'
        self.assertGdbRepr(b'')
        self.assertGdbRepr(b'And now for something hopefully the same')
        self.assertGdbRepr(b'string with embedded NUL here \0 and then some more text')
        self.assertGdbRepr(b'this is a tab:\t'
                           b' this is a slash-N:\n'
                           b' this is a slash-R:\r'
                           )

self.assertGdbRepr(b'this is byte 255:\xff and byte 128:\x80')

self.assertGdbRepr(bytes([b for b in range(255)]))

def test_strings(self):
        'Verify the pretty-printing of unicode strings'
        encoding = locale.getpreferredencoding()
        def check_repr(text):
            try:
                text.encode(encoding)
                printable = True
            except UnicodeEncodeError:
                self.assertGdbRepr(text, ascii(text))
            else:
                self.assertGdbRepr(text)

self.assertGdbRepr('')
        self.assertGdbRepr('And now for something hopefully the same')
        self.assertGdbRepr('string with embedded NUL here \0 and then some more text')

# Test printing a single character:
        #    U+2620 SKULL AND CROSSBONES
        check_repr('\u2620')

# Test printing a Japanese unicode string
        # (I believe this reads "mojibake", using 3 characters from the CJK
        # Unified Ideographs area, followed by U+3051 HIRAGANA LETTER KE)
        check_repr('\u6587\u5b57\u5316\u3051')

# Test a character outside the BMP:
        #    U+1D121 MUSICAL SYMBOL C CLEF
        # This is:
        # UTF-8: 0xF0 0x9D 0x84 0xA1
        # UTF-16: 0xD834 0xDD21
        check_repr(chr(0x1D121))

def test_tuples(self):
        'Verify the pretty-printing of tuples'
        self.assertGdbRepr(tuple(), '()')
        self.assertGdbRepr((1,), '(1,)')
        self.assertGdbRepr(('foo', 'bar', 'baz'))

def test_sets(self):
        'Verify the pretty-printing of sets'
        if (gdb_major_version, gdb_minor_version) < (7, 3):
            self.skipTest("pretty-printing of sets needs gdb 7.3 or later")
        self.assertGdbRepr(set(), "set()")
        self.assertGdbRepr(set(['a']), "{'a'}")
        # PYTHONHASHSEED is need to get the exact frozenset item order
        if not sys.flags.ignore_environment:
            self.assertGdbRepr(set(['a', 'b']), "{'a', 'b'}")
            self.assertGdbRepr(set([4, 5, 6]), "{4, 5, 6}")

# Ensure that we handle sets containing the "dummy" key value,
        # which happens on deletion:
        gdb_repr, gdb_output = self.get_gdb_repr('''s = set(['a','b'])
s.remove('a')
id(s)''')
        self.assertEqual(gdb_repr, "{'b'}")

def test_frozensets(self):
        'Verify the pretty-printing of frozensets'
        if (gdb_major_version, gdb_minor_version) < (7, 3):
            self.skipTest("pretty-printing of frozensets needs gdb 7.3 or later")
        self.assertGdbRepr(frozenset(), "frozenset()")
        self.assertGdbRepr(frozenset(['a']), "frozenset({'a'})")
        # PYTHONHASHSEED is need to get the exact frozenset item order
        if not sys.flags.ignore_environment:
            self.assertGdbRepr(frozenset(['a', 'b']), "frozenset({'a', 'b'})")
            self.assertGdbRepr(frozenset([4, 5, 6]), "frozenset({4, 5, 6})")

def test_exceptions(self):
        # Test a RuntimeError
        gdb_repr, gdb_output = self.get_gdb_repr('''
try:
    raise RuntimeError("I am an error")
except RuntimeError as e:
    id(e)
''')
        self.assertEqual(gdb_repr,
                         "RuntimeError('I am an error',)")

# Test division by zero:
        gdb_repr, gdb_output = self.get_gdb_repr('''
try:
    a = 1 / 0
except ZeroDivisionError as e:
    id(e)
''')
        self.assertEqual(gdb_repr,
                         "ZeroDivisionError('division by zero',)")

def test_modern_class(self):
        'Verify the pretty-printing of new-style class instances'
        gdb_repr, gdb_output = self.get_gdb_repr('''
class Foo:
    pass
foo = Foo()
foo.an_int = 42
id(foo)''')
        m = re.match(r'<Foo$an_int=42$ at remote 0x-?[0-9a-f]+>', gdb_repr)
        self.assertTrue(m,
                        msg='Unexpected new-style class rendering %r' % gdb_repr)

def test_subclassing_list(self):
        'Verify the pretty-printing of an instance of a list subclass'
        gdb_repr, gdb_output = self.get_gdb_repr('''
class Foo(list):
    pass
foo = Foo()
foo += [1, 2, 3]
foo.an_int = 42
id(foo)''')
        m = re.match(r'<Foo$an_int=42$ at remote 0x-?[0-9a-f]+>', gdb_repr)

self.assertTrue(m,
                        msg='Unexpected new-style class rendering %r' % gdb_repr)

def test_subclassing_tuple(self):
        'Verify the pretty-printing of an instance of a tuple subclass'
        # This should exercise the negative tp_dictoffset code in the
        # new-style class support
        gdb_repr, gdb_output = self.get_gdb_repr('''
class Foo(tuple):
    pass
foo = Foo((1, 2, 3))
foo.an_int = 42
id(foo)''')
        m = re.match(r'<Foo$an_int=42$ at remote 0x-?[0-9a-f]+>', gdb_repr)

self.assertTrue(m,
                        msg='Unexpected new-style class rendering %r' % gdb_repr)

def assertSane(self, source, corruption, exprepr=None):
        '''Run Python under gdb, corrupting variables in the inferior process
        immediately before taking a backtrace.

Verify that the variable's representation is the expected failsafe
        representation'''
        if corruption:
            cmds_after_breakpoint=[corruption, 'backtrace']
        else:
            cmds_after_breakpoint=['backtrace']

gdb_repr, gdb_output = \
            self.get_gdb_repr(source,
                              cmds_after_breakpoint=cmds_after_breakpoint)
        if exprepr:
            if gdb_repr == exprepr:
                # gdb managed to print the value in spite of the corruption;
                # this is good (see http://bugs.python.org/issue8330)
                return

# Match anything for the type name; 0xDEADBEEF could point to
        # something arbitrary (see  http://bugs.python.org/issue8330)
        pattern = '<.* at remote 0x-?[0-9a-f]+>'

m = re.match(pattern, gdb_repr)
        if not m:
            self.fail('Unexpected gdb representation: %r\n%s' % \
                          (gdb_repr, gdb_output))

def test_NULL_ptr(self):
        'Ensure that a NULL PyObject* is handled gracefully'
        gdb_repr, gdb_output = (
            self.get_gdb_repr('id(42)',
                              cmds_after_breakpoint=['set variable v=0',
                                                     'backtrace'])
            )

self.assertEqual(gdb_repr, '0x0')

def test_NULL_ob_type(self):
        'Ensure that a PyObject* with NULL ob_type is handled gracefully'
        self.assertSane('id(42)',
                        'set v->ob_type=0')

def test_corrupt_ob_type(self):
        'Ensure that a PyObject* with a corrupt ob_type is handled gracefully'
        self.assertSane('id(42)',
                        'set v->ob_type=0xDEADBEEF',
                        exprepr='42')

def test_corrupt_tp_flags(self):
        'Ensure that a PyObject* with a type with corrupt tp_flags is handled'
        self.assertSane('id(42)',
                        'set v->ob_type->tp_flags=0x0',
                        exprepr='42')

def test_corrupt_tp_name(self):
        'Ensure that a PyObject* with a type with corrupt tp_name is handled'
        self.assertSane('id(42)',
                        'set v->ob_type->tp_name=0xDEADBEEF',
                        exprepr='42')

def test_builtins_help(self):
        'Ensure that the new-style class _Helper in site.py can be handled'

if sys.flags.no_site:
            self.skipTest("need site module, but -S option was used")

# (this was the issue causing tracebacks in
        #  http://bugs.python.org/issue8032#msg100537 )
        gdb_repr, gdb_output = self.get_gdb_repr('id(__builtins__.help)', import_site=True)

m = re.match(r'<_Helper at remote 0x-?[0-9a-f]+>', gdb_repr)
        self.assertTrue(m,
                        msg='Unexpected rendering %r' % gdb_repr)

def test_selfreferential_list(self):
        '''Ensure that a reference loop involving a list doesn't lead proxyval
        into an infinite loop:'''
        gdb_repr, gdb_output = \
            self.get_gdb_repr("a = [3, 4, 5] ; a.append(a) ; id(a)")
        self.assertEqual(gdb_repr, '[3, 4, 5, [...]]')

gdb_repr, gdb_output = \
            self.get_gdb_repr("a = [3, 4, 5] ; b = [a] ; a.append(b) ; id(a)")
        self.assertEqual(gdb_repr, '[3, 4, 5, [[...]]]')

def test_selfreferential_dict(self):
        '''Ensure that a reference loop involving a dict doesn't lead proxyval
        into an infinite loop:'''
        gdb_repr, gdb_output = \
            self.get_gdb_repr("a = {} ; b = {'bar':a} ; a['foo'] = b ; id(a)")

self.assertEqual(gdb_repr, "{'foo': {'bar': {...}}}")

def test_selfreferential_old_style_instance(self):
        gdb_repr, gdb_output = \
            self.get_gdb_repr('''
class Foo:
    pass
foo = Foo()
foo.an_attr = foo
id(foo)''')
        self.assertTrue(re.match(r'<Foo$an_attr=<\.\.\.>$ at remote 0x-?[0-9a-f]+>',
                                 gdb_repr),
                        'Unexpected gdb representation: %r\n%s' % \
                            (gdb_repr, gdb_output))

def test_selfreferential_new_style_instance(self):
        gdb_repr, gdb_output = \
            self.get_gdb_repr('''
class Foo(object):
    pass
foo = Foo()
foo.an_attr = foo
id(foo)''')
        self.assertTrue(re.match(r'<Foo$an_attr=<\.\.\.>$ at remote 0x-?[0-9a-f]+>',
                                 gdb_repr),
                        'Unexpected gdb representation: %r\n%s' % \
                            (gdb_repr, gdb_output))

gdb_repr, gdb_output = \
            self.get_gdb_repr('''
class Foo(object):
    pass
a = Foo()
b = Foo()
a.an_attr = b
b.an_attr = a
id(a)''')
        self.assertTrue(re.match(r'<Foo$an_attr=<Foo\(an_attr=<\.\.\.>$ at remote 0x-?[0-9a-f]+>\) at remote 0x-?[0-9a-f]+>',
                                 gdb_repr),
                        'Unexpected gdb representation: %r\n%s' % \
                            (gdb_repr, gdb_output))

def test_truncation(self):
        'Verify that very long output is truncated'
        gdb_repr, gdb_output = self.get_gdb_repr('id(list(range(1000)))')
        self.assertEqual(gdb_repr,
                         "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, "
                         "14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, "
                         "27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, "
                         "40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, "
                         "53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, "
                         "66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, "
                         "79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, "
                         "92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, "
                         "104, 105, 106, 107, 108, 109, 110, 111, 112, 113, "
                         "114, 115, 116, 117, 118, 119, 120, 121, 122, 123, "
                         "124, 125, 126, 127, 128, 129, 130, 131, 132, 133, "
                         "134, 135, 136, 137, 138, 139, 140, 141, 142, 143, "
                         "144, 145, 146, 147, 148, 149, 150, 151, 152, 153, "
                         "154, 155, 156, 157, 158, 159, 160, 161, 162, 163, "
                         "164, 165, 166, 167, 168, 169, 170, 171, 172, 173, "
                         "174, 175, 176, 177, 178, 179, 180, 181, 182, 183, "
                         "184, 185, 186, 187, 188, 189, 190, 191, 192, 193, "
                         "194, 195, 196, 197, 198, 199, 200, 201, 202, 203, "
                         "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('''
def foo(a, b, c):
    pass

foo(3, 4, 5)
id(foo.__code__)''',
                                          breakpoint='builtin_id',
                                          cmds_after_breakpoint=['print (PyFrameObject*)(((PyCodeObject*)v)->co_zombieframe)']
                                          )
        self.assertTrue(re.match(r'.*\s+\$1 =\s+Frame 0x-?[0-9a-f]+, for file <string>, line 3, in foo \s+.*',
                                 gdb_output,
                                 re.DOTALL),
                        'Unexpected gdb representation: %r\n%s' % (gdb_output, gdb_output))

@unittest.skipIf(python_is_optimized(),
                 "Python was compiled with optimizations")
class PyListTests(DebuggerTests):
    def assertListing(self, expected, actual):
        self.assertEndsWith(actual, expected)

def test_basic_command(self):
        'Verify that the "py-list" command works'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-list'])

self.assertListing('   5    \n'
                           '   6    def bar(a, b, c):\n'
                           '   7        baz(a, b, c)\n'
                           '   8    \n'
                           '   9    def baz(*args):\n'
                           ' >10        id(42)\n'
                           '  11    \n'
                           '  12    foo(1, 2, 3)\n',
                           bt)

def test_one_abs_arg(self):
        'Verify the "py-list" command with one absolute argument'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-list 9'])

self.assertListing('   9    def baz(*args):\n'
                           ' >10        id(42)\n'
                           '  11    \n'
                           '  12    foo(1, 2, 3)\n',
                           bt)

def test_two_abs_args(self):
        'Verify the "py-list" command with two absolute arguments'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-list 1,3'])

self.assertListing('   1    # Sample script for use by test_gdb.py\n'
                           '   2    \n'
                           '   3    def foo(a, b, c):\n',
                           bt)

class StackNavigationTests(DebuggerTests):
    @unittest.skipUnless(HAS_PYUP_PYDOWN, "test requires py-up/py-down commands")
    @unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_pyup_command(self):
        'Verify that the "py-up" command works'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-up'])
        self.assertMultilineMatches(bt,
                                    r'''^.*
#[0-9]+ Frame 0x-?[0-9a-f]+, for file .*gdb_sample.py, line 7, in bar $a=1, b=2, c=3$
    baz$a, b, c$
$''')

@unittest.skipUnless(HAS_PYUP_PYDOWN, "test requires py-up/py-down commands")
    def test_down_at_bottom(self):
        'Verify handling of "py-down" at the bottom of the stack'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-down'])
        self.assertEndsWith(bt,
                            'Unable to find a newer python frame\n')

@unittest.skipUnless(HAS_PYUP_PYDOWN, "test requires py-up/py-down commands")
    def test_up_at_top(self):
        'Verify handling of "py-up" at the top of the stack'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up'] * 5)
        self.assertEndsWith(bt,
                            'Unable to find an older python frame\n')

@unittest.skipUnless(HAS_PYUP_PYDOWN, "test requires py-up/py-down commands")
    @unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_up_then_down(self):
        'Verify "py-up" followed by "py-down"'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-up', 'py-down'])
        self.assertMultilineMatches(bt,
                                    r'''^.*
#[0-9]+ Frame 0x-?[0-9a-f]+, for file .*gdb_sample.py, line 7, in bar $a=1, b=2, c=3$
    baz$a, b, c$
#[0-9]+ Frame 0x-?[0-9a-f]+, for file .*gdb_sample.py, line 10, in baz $args=\(1, 2, 3$\)
    id$42$
$''')

class PyBtTests(DebuggerTests):
    @unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_bt(self):
        'Verify that the "py-bt" command works'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-bt'])
        self.assertMultilineMatches(bt,
                                    r'''^.*
Traceback $most recent call first$:
  <built-in method id of module object .*>
  File ".*gdb_sample.py", line 10, in baz
    id$42$
  File ".*gdb_sample.py", line 7, in bar
    baz$a, b, c$
  File ".*gdb_sample.py", line 4, in foo
    bar$a, b, c$
  File ".*gdb_sample.py", line 12, in <module>
    foo$1, 2, 3$
''')

@unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_bt_full(self):
        'Verify that the "py-bt-full" command works'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-bt-full'])
        self.assertMultilineMatches(bt,
                                    r'''^.*
#[0-9]+ Frame 0x-?[0-9a-f]+, for file .*gdb_sample.py, line 7, in bar $a=1, b=2, c=3$
    baz$a, b, c$
#[0-9]+ Frame 0x-?[0-9a-f]+, for file .*gdb_sample.py, line 4, in foo $a=1, b=2, c=3$
    bar$a, b, c$
#[0-9]+ Frame 0x-?[0-9a-f]+, for file .*gdb_sample.py, line 12, in <module> 
    foo$1, 2, 3$
''')

@unittest.skipUnless(_thread,
                         "Python was compiled without thread support")
    def test_threads(self):
        'Verify that "py-bt" indicates threads that are waiting for the GIL'
        cmd = '''
from threading import Thread

class TestThread(Thread):
    # These threads would run forever, but we'll interrupt things with the
    # debugger
    def run(self):
        i = 0
        while 1:
             i += 1

t = {}
for i in range(4):
   t[i] = TestThread()
   t[i].start()

# Trigger a breakpoint on the main thread
id(42)

'''
        # Verify with "py-bt":
        gdb_output = self.get_stack_trace(cmd,
                                          cmds_after_breakpoint=['thread apply all py-bt'])
        self.assertIn('Waiting for the GIL', gdb_output)

# Verify with "py-bt-full":
        gdb_output = self.get_stack_trace(cmd,
                                          cmds_after_breakpoint=['thread apply all py-bt-full'])
        self.assertIn('Waiting for the GIL', gdb_output)

@unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    # Some older versions of gdb will fail with
    #  "Cannot find new threads: generic error"
    # unless we add LD_PRELOAD=PATH-TO-libpthread.so.1 as a workaround
    @unittest.skipUnless(_thread,
                         "Python was compiled without thread support")
    def test_gc(self):
        'Verify that "py-bt" indicates if a thread is garbage-collecting'
        cmd = ('from gc import collect\n'
               'id(42)\n'
               'def foo():\n'
               '    collect()\n'
               'def bar():\n'
               '    foo()\n'
               'bar()\n')
        # Verify with "py-bt":
        gdb_output = self.get_stack_trace(cmd,
                                          cmds_after_breakpoint=['break update_refs', 'continue', 'py-bt'],
                                          )
        self.assertIn('Garbage-collecting', gdb_output)

# Verify with "py-bt-full":
        gdb_output = self.get_stack_trace(cmd,
                                          cmds_after_breakpoint=['break update_refs', 'continue', 'py-bt-full'],
                                          )
        self.assertIn('Garbage-collecting', gdb_output)

@unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    # Some older versions of gdb will fail with
    #  "Cannot find new threads: generic error"
    # unless we add LD_PRELOAD=PATH-TO-libpthread.so.1 as a workaround
    @unittest.skipUnless(_thread,
                         "Python was compiled without thread support")
    def test_pycfunction(self):
        'Verify that "py-bt" displays invocations of PyCFunction instances'
        # Tested function must not be defined with METH_NOARGS or METH_O,
        # otherwise call_function() doesn't call PyCFunction_Call()
        cmd = ('from time import gmtime\n'
               'def foo():\n'
               '    gmtime(1)\n'
               'def bar():\n'
               '    foo()\n'
               'bar()\n')
        # Verify with "py-bt":
        gdb_output = self.get_stack_trace(cmd,
                                          breakpoint='time_gmtime',
                                          cmds_after_breakpoint=['bt', 'py-bt'],
                                          )
        self.assertIn('<built-in method gmtime', gdb_output)

# Verify with "py-bt-full":
        gdb_output = self.get_stack_trace(cmd,
                                          breakpoint='time_gmtime',
                                          cmds_after_breakpoint=['py-bt-full'],
                                          )
        self.assertIn('#1 <built-in method gmtime', gdb_output)

@unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_wrapper_call(self):
        cmd = textwrap.dedent('''
            class MyList(list):
                def __init__(self):
                    super().__init__()   # wrapper_call()

id("first break point")
            l = MyList()
        ''')
        cmds_after_breakpoint = ['break wrapper_call', 'continue']
        if CET_PROTECTION:
            # bpo-32962: same case as in get_stack_trace():
            # we need an additional 'next' command in order to read
            # arguments of the innermost function of the call stack.
            cmds_after_breakpoint.append('next')
        cmds_after_breakpoint.append('py-bt')

# Verify with "py-bt":
        gdb_output = self.get_stack_trace(cmd,
                                          cmds_after_breakpoint=cmds_after_breakpoint)
        self.assertRegex(gdb_output,
                         r"<method-wrapper u?'__init__' of MyList object at ")

class PyPrintTests(DebuggerTests):
    @unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_basic_command(self):
        'Verify that the "py-print" command works'
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-print args'])
        self.assertMultilineMatches(bt,
                                    r".*\nlocal 'args' = $1, 2, 3$\n.*")

@unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    @unittest.skipUnless(HAS_PYUP_PYDOWN, "test requires py-up/py-down commands")
    def test_print_after_up(self):
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-up', 'py-print c', 'py-print b', 'py-print a'])
        self.assertMultilineMatches(bt,
                                    r".*\nlocal 'c' = 3\nlocal 'b' = 2\nlocal 'a' = 1\n.*")

@unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_printing_global(self):
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-print __name__'])
        self.assertMultilineMatches(bt,
                                    r".*\nglobal '__name__' = '__main__'\n.*")

@unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_printing_builtin(self):
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-print len'])
        self.assertMultilineMatches(bt,
                                    r".*\nbuiltin 'len' = <built-in method len of module object at remote 0x-?[0-9a-f]+>\n.*")

class PyLocalsTests(DebuggerTests):
    @unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_basic_command(self):
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-locals'])
        self.assertMultilineMatches(bt,
                                    r".*\nargs = $1, 2, 3$\n.*")

@unittest.skipUnless(HAS_PYUP_PYDOWN, "test requires py-up/py-down commands")
    @unittest.skipIf(python_is_optimized(),
                     "Python was compiled with optimizations")
    def test_locals_after_up(self):
        bt = self.get_stack_trace(script=self.get_sample_script(),
                                  cmds_after_breakpoint=['py-up', 'py-up', 'py-locals'])
        self.assertMultilineMatches(bt,
                                    r".*\na = 1\nb = 2\nc = 3\n.*")

def test_main():
    if support.verbose:
        print("GDB version %s.%s:" % (gdb_major_version, gdb_minor_version))
        for line in gdb_version.splitlines():
            print(" " * 4 + line)
    run_unittest(PrettyPrintTests,
                 PyListTests,
                 StackNavigationTests,
                 PyBtTests,
                 PyPrintTests,
                 PyLocalsTests
                 )

if __name__ == "__main__":
    test_main()