# 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 os
import re
import subprocess
import sys
import unittest
import sysconfig
from test.test_support import run_unittest, findfile
try:
gdb_version, _ = subprocess.Popen(["gdb", "--version"],
stdout=subprocess.PIPE).communicate()
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")
gdb_version_number = re.search("^GNU gdb [^\d]*(\d+)\.(\d)", gdb_version)
gdb_major_version = int(gdb_version_number.group(1))
gdb_minor_version = int(gdb_version_number.group(2))
if gdb_major_version < 7:
raise unittest.SkipTest("gdb versions before 7.0 didn't support python embedding"
" Saw:\n" + gdb_version)
# Location of custom hooks file in a repository checkout.
checkout_hook_path = os.path.join(os.path.dirname(sys.executable),
'python-gdb.py')
def run_gdb(*args, **env_vars):
"""Runs gdb in --batch mode with the additional arguments given by *args.
Returns its (stdout, stderr)
"""
if env_vars:
env = os.environ.copy()
env.update(env_vars)
else:
env = None
base_cmd = ('gdb', '--batch')
if (gdb_major_version, gdb_minor_version) >= (7, 4):
base_cmd += ('-iex', 'add-auto-load-safe-path ' + checkout_hook_path)
out, err = subprocess.Popen(base_cmd + args,
stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env,
).communicate()
return out, err
# 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. In theory this should never
# fail, but we don't handle the case of the hooks file not existing if the
# tests are run from an installed Python (we'll produce failures in that case).
cmd = ['--args', sys.executable]
_, 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: "
def python_is_optimized():
cflags = sysconfig.get_config_vars()['PY_CFLAGS']
final_opt = ""
for opt in cflags.split():
if opt.startswith('-O'):
final_opt = opt
return (final_opt and final_opt != '-O0')
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()
def gdb_has_autoload_safepath():
# Recent GDBs will only auto-load scripts from certain safe
# locations, so we will need to turn off this protection.
# However, if the GDB doesn't have it, then the following
# command will generate noise on stderr (rhbz#817072):
cmd = "--eval-command=set auto-load safe-path /"
p = subprocess.Popen(["gdb", "--batch", cmd],
stderr=subprocess.PIPE)
_, stderr = p.communicate()
return '"on" or "off" expected.' not in stderr
HAS_AUTOLOAD_SAFEPATH = gdb_has_autoload_safepath()
class DebuggerTests(unittest.TestCase):
"""Test that the debugger can debug Python."""
def get_stack_trace(self, source=None, script=None,
breakpoint='PyObject_Print',
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 "PyObject_Print" 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,
# GDB as of Fedora 17 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:
'set print entry-values no',
# The tests assume that the first frame of printed
# backtrace will not contain program counter,
# that is however not guaranteed by gdb (rhbz#1125657)
# 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']
if HAS_AUTOLOAD_SAFEPATH:
# Recent GDBs will only auto-load scripts from certain safe
# locations.
# Where necessary, turn off this protection to ensure that
# our -gdb.py script can be loaded - but not on earlier gdb builds
# as this would generate noise on stderr (rhbz#817072):
init_commands = ['set auto-load safe-path /']
else:
init_commands = []
if cmds_after_breakpoint:
commands += cmds_after_breakpoint
else:
commands += ['backtrace']
# print init_commands
# print commands
# Use "commands" to generate the arguments with which to invoke "gdb":
args = ["gdb", "--batch"]
args += ['--init-eval-command=%s' % cmd for cmd in init_commands]
args += ['--eval-command=%s' % cmd for cmd in commands]
args += ["--args",
sys.executable]
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='0')
errlines = err.splitlines()
unexpected_errlines = []
# Ignore some benign messages on stderr.
ignore_patterns = (
'Function "%s" not defined.' % breakpoint,
"warning: no loadable sections found in added symbol-file"
" system-supplied DSO",
"warning: Unable to find libthread_db matching"
" inferior's thread library, thread debugging will"
" not be available.",
"warning: Cannot initialize thread debugging"
" library: Debugger service failed",
'warning: Could not load shared library symbols for '
'linux-vdso.so',
'warning: Could not load shared library symbols for '
'linux-gate.so',
'Do you need "set solib-search-path" or '
'"set sysroot"?',
)
ignore_patterns += ('warning: Unable to open',
'Missing separate debuginfo for',
'Try: yum --disablerepo=',
'Undefined set print command')
for line in errlines:
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'print DATA'" under gdb with a breakpoint on
# PyObject_Print and scrape out gdb's representation of the "op"
# parameter, and verify that the gdb displays the same string
#
# For a nested structure, the first time we hit the breakpoint will
# give us the top-level structure
gdb_output = self.get_stack_trace(source, breakpoint='PyObject_Print',
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('.*#0\s+PyObject_Print\s+\(\s*op\=\s*(.*?),\s+fp=.*\).*',
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)
self.assertTrue(m, 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('print 42')
self.assertTrue('PyObject_Print' in gdb_output)
def assertGdbRepr(self, val, cmds_after_breakpoint=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('print ' + repr(val),
cmds_after_breakpoint)
self.assertEqual(gdb_repr, repr(val), 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(sys.maxint)
self.assertGdbRepr(-sys.maxint)
def test_long(self):
'Verify the pretty-printing of various "long" values'
self.assertGdbRepr(0L)
self.assertGdbRepr(1000000000000L)
self.assertGdbRepr(-1L)
self.assertGdbRepr(-1000000000000000L)
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'})
self.assertGdbRepr("{'foo': 'bar', 'douglas':42}")
def test_lists(self):
'Verify the pretty-printing of lists'
self.assertGdbRepr([])
self.assertGdbRepr(range(5))
def test_strings(self):
'Verify the pretty-printing of strings'
self.assertGdbRepr('')
self.assertGdbRepr('And now for something hopefully the same')
self.assertGdbRepr('string with embedded NUL here \0 and then some more text')
self.assertGdbRepr('this is byte 255:\xff and byte 128:\x80')
def test_tuples(self):
'Verify the pretty-printing of tuples'
self.assertGdbRepr(tuple())
self.assertGdbRepr((1,))
self.assertGdbRepr(('foo', 'bar', 'baz'))
def test_unicode(self):
'Verify the pretty-printing of unicode values'
# Test the empty unicode string:
self.assertGdbRepr(u'')
self.assertGdbRepr(u'hello world')
# Test printing a single character:
# U+2620 SKULL AND CROSSBONES
self.assertGdbRepr(u'\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)
self.assertGdbRepr(u'\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
# This will only work on wide-unicode builds:
self.assertGdbRepr(u"\U0001D121")
def test_sets(self):
'Verify the pretty-printing of sets'
self.assertGdbRepr(set())
rep = self.get_gdb_repr("print set(['a', 'b'])")[0]
self.assertTrue(rep.startswith("set(["))
self.assertTrue(rep.endswith("])"))
self.assertEqual(eval(rep), {'a', 'b'})
rep = self.get_gdb_repr("print set([4, 5])")[0]
self.assertTrue(rep.startswith("set(["))
self.assertTrue(rep.endswith("])"))
self.assertEqual(eval(rep), {4, 5})
# Ensure that we handled sets containing the "dummy" key value,
# which happens on deletion:
gdb_repr, gdb_output = self.get_gdb_repr('''s = set(['a','b'])
s.pop()
print s''')
self.assertEqual(gdb_repr, "set(['b'])")
def test_frozensets(self):
'Verify the pretty-printing of frozensets'
self.assertGdbRepr(frozenset())
rep = self.get_gdb_repr("print frozenset(['a', 'b'])")[0]
self.assertTrue(rep.startswith("frozenset(["))
self.assertTrue(rep.endswith("])"))
self.assertEqual(eval(rep), {'a', 'b'})
rep = self.get_gdb_repr("print frozenset([4, 5])")[0]
self.assertTrue(rep.startswith("frozenset(["))
self.assertTrue(rep.endswith("])"))
self.assertEqual(eval(rep), {4, 5})
def test_exceptions(self):
# Test a RuntimeError
gdb_repr, gdb_output = self.get_gdb_repr('''
try:
raise RuntimeError("I am an error")
except RuntimeError, e:
print e
''')
self.assertEqual(gdb_repr,
"exceptions.RuntimeError('I am an error',)")
# Test division by zero:
gdb_repr, gdb_output = self.get_gdb_repr('''
try:
a = 1 / 0
except ZeroDivisionError, e:
print e
''')
self.assertEqual(gdb_repr,
"exceptions.ZeroDivisionError('integer division or modulo by zero',)")
def test_classic_class(self):
'Verify the pretty-printing of classic class instances'
gdb_repr, gdb_output = self.get_gdb_repr('''
class Foo:
pass
foo = Foo()
foo.an_int = 42
print foo''')
m = re.match(r'<Foo\(an_int=42\) at remote 0x[0-9a-f]+>', gdb_repr)
self.assertTrue(m,
msg='Unexpected classic-class rendering %r' % gdb_repr)
def test_modern_class(self):
'Verify the pretty-printing of new-style class instances'
gdb_repr, gdb_output = self.get_gdb_repr('''
class Foo(object):
pass
foo = Foo()
foo.an_int = 42
print 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
print 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
print 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, expvalue=None, exptype=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 expvalue:
if gdb_repr == repr(expvalue):
# gdb managed to print the value in spite of the corruption;
# this is good (see http://bugs.python.org/issue8330)
return
if exptype:
pattern = '<' + exptype + ' at remote 0x[0-9a-f]+>'
else:
# 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('print 42',
cmds_after_breakpoint=['set variable op=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('print 42',
'set op->ob_type=0')
def test_corrupt_ob_type(self):
'Ensure that a PyObject* with a corrupt ob_type is handled gracefully'
self.assertSane('print 42',
'set op->ob_type=0xDEADBEEF',
expvalue=42)
def test_corrupt_tp_flags(self):
'Ensure that a PyObject* with a type with corrupt tp_flags is handled'
self.assertSane('print 42',
'set op->ob_type->tp_flags=0x0',
expvalue=42)
def test_corrupt_tp_name(self):
'Ensure that a PyObject* with a type with corrupt tp_name is handled'
self.assertSane('print 42',
'set op->ob_type->tp_name=0xDEADBEEF',
expvalue=42)
def test_NULL_instance_dict(self):
'Ensure that a PyInstanceObject with with a NULL in_dict is handled'
self.assertSane('''
class Foo:
pass
foo = Foo()
foo.an_int = 42
print foo''',
'set ((PyInstanceObject*)op)->in_dict = 0',
exptype='Foo')
def test_builtins_help(self):
'Ensure that the new-style class _Helper in site.py can be handled'
# (this was the issue causing tracebacks in
# http://bugs.python.org/issue8032#msg100537 )
gdb_repr, gdb_output = self.get_gdb_repr('print __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) ; print 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) ; print 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 ; print 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
print foo''')
self.assertTrue(re.match('<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
print foo''')
self.assertTrue(re.match('<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
print a''')
self.assertTrue(re.match('<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('print 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_function(self):
gdb_repr, gdb_output = self.get_gdb_repr('print len')
self.assertEqual(gdb_repr, '<built-in function len>')
def test_builtin_method(self):
gdb_repr, gdb_output = self.get_gdb_repr('import sys; print sys.stdout.readlines')
self.assertTrue(re.match('<built-in method readlines of file 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)
print foo.__code__''',
breakpoint='PyObject_Print',
cmds_after_breakpoint=['print (PyFrameObject*)(((PyCodeObject*)op)->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 print(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 print(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)
@unittest.skipUnless(HAS_PYUP_PYDOWN, "test requires py-up/py-down commands")
@unittest.skipIf(python_is_optimized(),
"Python was compiled with optimizations")
class StackNavigationTests(DebuggerTests):
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'])
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\(a, b, c\)
$''')
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')
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'] * 4)
self.assertEndsWith(bt,
'Unable to find an older python frame\n')
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-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=\(1, 2, 3\)\)
print\(42\)
$''')
class PyBtTests(DebuggerTests):
@unittest.skipIf(python_is_optimized(),
"Python was compiled with optimizations")
def test_basic_command(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'''^.*
#[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\(1, 2, 3\)
''')
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-print args'])
self.assertMultilineMatches(bt,
r".*\nlocal 'args' = \(1, 2, 3\)\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_print_after_up(self):
bt = self.get_stack_trace(script=self.get_sample_script(),
cmds_after_breakpoint=['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-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-print len'])
self.assertMultilineMatches(bt,
r".*\nbuiltin 'len' = <built-in function len>\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-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-locals'])
self.assertMultilineMatches(bt,
r".*\na = 1\nb = 2\nc = 3\n.*")
def test_main():
run_unittest(PrettyPrintTests,
PyListTests,
StackNavigationTests,
PyBtTests,
PyPrintTests,
PyLocalsTests
)
if __name__ == "__main__":
test_main()