add ymake export to ydb

7 files changed, 945 insertions, 0 deletions

diff --git a/contrib/tools/cython/Cython/Debugger/Tests/TestLibCython.py b/contrib/tools/cython/Cython/Debugger/Tests/TestLibCython.py
new file mode 100644
index 0000000000..13560646ff
--- /dev/null
+++ b/contrib/tools/cython/Cython/Debugger/Tests/TestLibCython.py
@@ -0,0 +1,274 @@
+
+import os
+import re
+import sys
+import shutil
+import warnings
+import textwrap
+import unittest
+import tempfile
+import subprocess
+#import distutils.core
+#from distutils import sysconfig
+from distutils import ccompiler
+
+import runtests
+import Cython.Distutils.extension
+import Cython.Distutils.old_build_ext as build_ext
+from Cython.Debugger import Cygdb as cygdb
+
+root = os.path.dirname(os.path.abspath(__file__))
+codefile = os.path.join(root, 'codefile')
+cfuncs_file = os.path.join(root, 'cfuncs.c')
+
+with open(codefile) as f:
+    source_to_lineno = dict((line.strip(), i + 1) for i, line in enumerate(f))
+
+
+have_gdb = None
+def test_gdb():
+    global have_gdb
+    if have_gdb is not None:
+        return have_gdb
+
+    have_gdb = False
+    try:
+        p = subprocess.Popen(['gdb', '-nx', '--version'], stdout=subprocess.PIPE)
+    except OSError:
+        # gdb not found
+        gdb_version = None
+    else:
+        stdout, _ = p.communicate()
+        # Based on Lib/test/test_gdb.py
+        regex = r"GNU gdb [^\d]*(\d+)\.(\d+)"
+        gdb_version = re.match(regex, stdout.decode('ascii', 'ignore'))
+
+    if gdb_version:
+        gdb_version_number = list(map(int, gdb_version.groups()))
+        if gdb_version_number >= [7, 2]:
+            have_gdb = True
+            with tempfile.NamedTemporaryFile(mode='w+') as python_version_script:
+                python_version_script.write(
+                    'python import sys; print("%s %s" % sys.version_info[:2])')
+                python_version_script.flush()
+                p = subprocess.Popen(['gdb', '-batch', '-x', python_version_script.name],
+                                     stdout=subprocess.PIPE)
+                stdout, _ = p.communicate()
+                try:
+                    internal_python_version = list(map(int, stdout.decode('ascii', 'ignore').split()))
+                    if internal_python_version < [2, 6]:
+                        have_gdb = False
+                except ValueError:
+                    have_gdb = False
+
+    if not have_gdb:
+        warnings.warn('Skipping gdb tests, need gdb >= 7.2 with Python >= 2.6')
+
+    return have_gdb
+
+
+class DebuggerTestCase(unittest.TestCase):
+
+    def setUp(self):
+        """
+        Run gdb and have cygdb import the debug information from the code
+        defined in TestParseTreeTransforms's setUp method
+        """
+        if not test_gdb():
+            return
+
+        self.tempdir = tempfile.mkdtemp()
+        self.destfile = os.path.join(self.tempdir, 'codefile.pyx')
+        self.debug_dest = os.path.join(self.tempdir,
+                                      'cython_debug',
+                                      'cython_debug_info_codefile')
+        self.cfuncs_destfile = os.path.join(self.tempdir, 'cfuncs')
+
+        self.cwd = os.getcwd()
+        try:
+            os.chdir(self.tempdir)
+
+            shutil.copy(codefile, self.destfile)
+            shutil.copy(cfuncs_file, self.cfuncs_destfile + '.c')
+            shutil.copy(cfuncs_file.replace('.c', '.h'),
+                        self.cfuncs_destfile + '.h')
+
+            compiler = ccompiler.new_compiler()
+            compiler.compile(['cfuncs.c'], debug=True, extra_postargs=['-fPIC'])
+
+            opts = dict(
+                test_directory=self.tempdir,
+                module='codefile',
+            )
+
+            optimization_disabler = build_ext.Optimization()
+
+            cython_compile_testcase = runtests.CythonCompileTestCase(
+                workdir=self.tempdir,
+                # we clean up everything (not only compiled files)
+                cleanup_workdir=False,
+                tags=runtests.parse_tags(codefile),
+                **opts
+            )
+
+
+            new_stderr = open(os.devnull, 'w')
+
+            stderr = sys.stderr
+            sys.stderr = new_stderr
+
+            optimization_disabler.disable_optimization()
+            try:
+                cython_compile_testcase.run_cython(
+                    targetdir=self.tempdir,
+                    incdir=None,
+                    annotate=False,
+                    extra_compile_options={
+                        'gdb_debug':True,
+                        'output_dir':self.tempdir,
+                    },
+                    **opts
+                )
+
+                cython_compile_testcase.run_distutils(
+                    incdir=None,
+                    workdir=self.tempdir,
+                    extra_extension_args={'extra_objects':['cfuncs.o']},
+                    **opts
+                )
+            finally:
+                optimization_disabler.restore_state()
+                sys.stderr = stderr
+                new_stderr.close()
+
+            # ext = Cython.Distutils.extension.Extension(
+                # 'codefile',
+                # ['codefile.pyx'],
+                # cython_gdb=True,
+                # extra_objects=['cfuncs.o'])
+            #
+            # distutils.core.setup(
+                # script_args=['build_ext', '--inplace'],
+                # ext_modules=[ext],
+                # cmdclass=dict(build_ext=Cython.Distutils.build_ext)
+            # )
+
+        except:
+            os.chdir(self.cwd)
+            raise
+
+    def tearDown(self):
+        if not test_gdb():
+            return
+        os.chdir(self.cwd)
+        shutil.rmtree(self.tempdir)
+
+
+class GdbDebuggerTestCase(DebuggerTestCase):
+
+    def setUp(self):
+        if not test_gdb():
+            return
+
+        super(GdbDebuggerTestCase, self).setUp()
+
+        prefix_code = textwrap.dedent('''\
+            python
+
+            import os
+            import sys
+            import traceback
+
+            def excepthook(type, value, tb):
+                traceback.print_exception(type, value, tb)
+                sys.stderr.flush()
+                sys.stdout.flush()
+                os._exit(1)
+
+            sys.excepthook = excepthook
+
+            # Have tracebacks end up on sys.stderr (gdb replaces sys.stderr
+            # with an object that calls gdb.write())
+            sys.stderr = sys.__stderr__
+
+            end
+            ''')
+
+        code = textwrap.dedent('''\
+            python
+
+            from Cython.Debugger.Tests import test_libcython_in_gdb
+            test_libcython_in_gdb.main(version=%r)
+
+            end
+            ''' % (sys.version_info[:2],))
+
+        self.gdb_command_file = cygdb.make_command_file(self.tempdir,
+                                                        prefix_code)
+
+        with open(self.gdb_command_file, 'a') as f:
+            f.write(code)
+
+        args = ['gdb', '-batch', '-x', self.gdb_command_file, '-n', '--args',
+                sys.executable, '-c', 'import codefile']
+
+        paths = []
+        path = os.environ.get('PYTHONPATH')
+        if path:
+            paths.append(path)
+        paths.append(os.path.dirname(os.path.dirname(
+            os.path.abspath(Cython.__file__))))
+        env = dict(os.environ, PYTHONPATH=os.pathsep.join(paths))
+
+        self.p = subprocess.Popen(
+            args,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            env=env)
+
+    def tearDown(self):
+        if not test_gdb():
+            return
+
+        try:
+            super(GdbDebuggerTestCase, self).tearDown()
+            if self.p:
+                try: self.p.stdout.close()
+                except: pass
+                try: self.p.stderr.close()
+                except: pass
+                self.p.wait()
+        finally:
+            os.remove(self.gdb_command_file)
+
+
+class TestAll(GdbDebuggerTestCase):
+
+    def test_all(self):
+        if not test_gdb():
+            return
+
+        out, err = self.p.communicate()
+        out = out.decode('UTF-8')
+        err = err.decode('UTF-8')
+
+        exit_status = self.p.returncode
+
+        if exit_status == 1:
+            sys.stderr.write(out)
+            sys.stderr.write(err)
+        elif exit_status >= 2:
+            border = u'*' * 30
+            start  = u'%s   v INSIDE GDB v   %s' % (border, border)
+            stderr = u'%s   v STDERR v   %s' % (border, border)
+            end    = u'%s   ^ INSIDE GDB ^   %s' % (border, border)
+            errmsg = u'\n%s\n%s%s\n%s%s' % (start, out, stderr, err, end)
+
+            sys.stderr.write(errmsg)
+
+        # FIXME: re-enable this to make the test fail on internal failures
+        #self.assertEqual(exit_status, 0)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/contrib/tools/cython/Cython/Debugger/Tests/__init__.py b/contrib/tools/cython/Cython/Debugger/Tests/__init__.py
new file mode 100644
index 0000000000..fa81adaff6
--- /dev/null
+++ b/contrib/tools/cython/Cython/Debugger/Tests/__init__.py
@@ -0,0 +1 @@
+# empty file
diff --git a/contrib/tools/cython/Cython/Debugger/Tests/cfuncs.c b/contrib/tools/cython/Cython/Debugger/Tests/cfuncs.c
new file mode 100644
index 0000000000..ccb42050bf
--- /dev/null
+++ b/contrib/tools/cython/Cython/Debugger/Tests/cfuncs.c
@@ -0,0 +1,8 @@
+void
+some_c_function(void)
+{
+    int a, b, c;
+
+    a = 1;
+    b = 2;
+}
diff --git a/contrib/tools/cython/Cython/Debugger/Tests/cfuncs.h b/contrib/tools/cython/Cython/Debugger/Tests/cfuncs.h
new file mode 100644
index 0000000000..3b21bc2d5f
--- /dev/null
+++ b/contrib/tools/cython/Cython/Debugger/Tests/cfuncs.h
@@ -0,0 +1 @@
+void some_c_function(void);
diff --git a/contrib/tools/cython/Cython/Debugger/Tests/codefile b/contrib/tools/cython/Cython/Debugger/Tests/codefile
new file mode 100644
index 0000000000..6b4c6b6add
--- /dev/null
+++ b/contrib/tools/cython/Cython/Debugger/Tests/codefile
@@ -0,0 +1,50 @@
+cdef extern from "stdio.h":
+    int puts(char *s)
+
+cdef extern from "cfuncs.h":
+    void some_c_function()
+
+import os
+
+cdef int c_var = 12
+python_var = 13
+
+def spam(a=0):
+    cdef:
+        int b, c
+
+    b = c = d = 0
+
+    b = 1
+    c = 2
+    int(10)
+    puts("spam")
+    os.path.join("foo", "bar")
+    some_c_function()
+
+cpdef eggs():
+    pass
+
+cdef ham():
+    pass
+
+cdef class SomeClass(object):
+    def spam(self):
+        pass
+
+def outer():
+    cdef object a = "an object"
+    def inner():
+        b = 2
+        # access closed over variables
+        print a, b
+    return inner
+
+
+outer()()
+
+spam()
+print "bye!"
+
+def use_ham():
+    ham()
diff --git a/contrib/tools/cython/Cython/Debugger/Tests/test_libcython_in_gdb.py b/contrib/tools/cython/Cython/Debugger/Tests/test_libcython_in_gdb.py
new file mode 100644
index 0000000000..bd7608d607
--- /dev/null
+++ b/contrib/tools/cython/Cython/Debugger/Tests/test_libcython_in_gdb.py
@@ -0,0 +1,496 @@
+"""
+Tests that run inside GDB.
+
+Note: debug information is already imported by the file generated by
+Cython.Debugger.Cygdb.make_command_file()
+"""
+
+from __future__ import absolute_import
+
+import os
+import re
+import sys
+import trace
+import inspect
+import warnings
+import unittest
+import textwrap
+import tempfile
+import functools
+import traceback
+import itertools
+#from test import test_support
+
+import gdb
+
+from .. import libcython
+from .. import libpython
+from . import TestLibCython as test_libcython
+from ...Utils import add_metaclass
+
+# for some reason sys.argv is missing in gdb
+sys.argv = ['gdb']
+
+
+def print_on_call_decorator(func):
+    @functools.wraps(func)
+    def wrapper(self, *args, **kwargs):
+        _debug(type(self).__name__, func.__name__)
+
+        try:
+            return func(self, *args, **kwargs)
+        except Exception:
+            _debug("An exception occurred:", traceback.format_exc())
+            raise
+
+    return wrapper
+
+class TraceMethodCallMeta(type):
+
+    def __init__(self, name, bases, dict):
+        for func_name, func in dict.items():
+            if inspect.isfunction(func):
+                setattr(self, func_name, print_on_call_decorator(func))
+
+
+@add_metaclass(TraceMethodCallMeta)
+class DebugTestCase(unittest.TestCase):
+    """
+    Base class for test cases. On teardown it kills the inferior and unsets
+    all breakpoints.
+    """
+
+    def __init__(self, name):
+        super(DebugTestCase, self).__init__(name)
+        self.cy = libcython.cy
+        self.module = libcython.cy.cython_namespace['codefile']
+        self.spam_func, self.spam_meth = libcython.cy.functions_by_name['spam']
+        self.ham_func = libcython.cy.functions_by_qualified_name[
+            'codefile.ham']
+        self.eggs_func = libcython.cy.functions_by_qualified_name[
+            'codefile.eggs']
+
+    def read_var(self, varname, cast_to=None):
+        result = gdb.parse_and_eval('$cy_cvalue("%s")' % varname)
+        if cast_to:
+            result = cast_to(result)
+
+        return result
+
+    def local_info(self):
+        return gdb.execute('info locals', to_string=True)
+
+    def lineno_equals(self, source_line=None, lineno=None):
+        if source_line is not None:
+            lineno = test_libcython.source_to_lineno[source_line]
+        frame = gdb.selected_frame()
+        self.assertEqual(libcython.cython_info.lineno(frame), lineno)
+
+    def break_and_run(self, source_line):
+        break_lineno = test_libcython.source_to_lineno[source_line]
+        gdb.execute('cy break codefile:%d' % break_lineno, to_string=True)
+        gdb.execute('run', to_string=True)
+
+    def tearDown(self):
+        gdb.execute('delete breakpoints', to_string=True)
+        try:
+            gdb.execute('kill inferior 1', to_string=True)
+        except RuntimeError:
+            pass
+
+        gdb.execute('set args -c "import codefile"')
+
+
+class TestDebugInformationClasses(DebugTestCase):
+
+    def test_CythonModule(self):
+        "test that debug information was parsed properly into data structures"
+        self.assertEqual(self.module.name, 'codefile')
+        global_vars = ('c_var', 'python_var', '__name__',
+                       '__builtins__', '__doc__', '__file__')
+        assert set(global_vars).issubset(self.module.globals)
+
+    def test_CythonVariable(self):
+        module_globals = self.module.globals
+        c_var = module_globals['c_var']
+        python_var = module_globals['python_var']
+        self.assertEqual(c_var.type, libcython.CObject)
+        self.assertEqual(python_var.type, libcython.PythonObject)
+        self.assertEqual(c_var.qualified_name, 'codefile.c_var')
+
+    def test_CythonFunction(self):
+        self.assertEqual(self.spam_func.qualified_name, 'codefile.spam')
+        self.assertEqual(self.spam_meth.qualified_name,
+                         'codefile.SomeClass.spam')
+        self.assertEqual(self.spam_func.module, self.module)
+
+        assert self.eggs_func.pf_cname, (self.eggs_func, self.eggs_func.pf_cname)
+        assert not self.ham_func.pf_cname
+        assert not self.spam_func.pf_cname
+        assert not self.spam_meth.pf_cname
+
+        self.assertEqual(self.spam_func.type, libcython.CObject)
+        self.assertEqual(self.ham_func.type, libcython.CObject)
+
+        self.assertEqual(self.spam_func.arguments, ['a'])
+        self.assertEqual(self.spam_func.step_into_functions,
+                         set(['puts', 'some_c_function']))
+
+        expected_lineno = test_libcython.source_to_lineno['def spam(a=0):']
+        self.assertEqual(self.spam_func.lineno, expected_lineno)
+        self.assertEqual(sorted(self.spam_func.locals), list('abcd'))
+
+
+class TestParameters(unittest.TestCase):
+
+    def test_parameters(self):
+        gdb.execute('set cy_colorize_code on')
+        assert libcython.parameters.colorize_code
+        gdb.execute('set cy_colorize_code off')
+        assert not libcython.parameters.colorize_code
+
+
+class TestBreak(DebugTestCase):
+
+    def test_break(self):
+        breakpoint_amount = len(gdb.breakpoints() or ())
+        gdb.execute('cy break codefile.spam')
+
+        self.assertEqual(len(gdb.breakpoints()), breakpoint_amount + 1)
+        bp = gdb.breakpoints()[-1]
+        self.assertEqual(bp.type, gdb.BP_BREAKPOINT)
+        assert self.spam_func.cname in bp.location
+        assert bp.enabled
+
+    def test_python_break(self):
+        gdb.execute('cy break -p join')
+        assert 'def join(' in gdb.execute('cy run', to_string=True)
+
+    def test_break_lineno(self):
+        beginline = 'import os'
+        nextline = 'cdef int c_var = 12'
+
+        self.break_and_run(beginline)
+        self.lineno_equals(beginline)
+        step_result = gdb.execute('cy step', to_string=True)
+        self.lineno_equals(nextline)
+        assert step_result.rstrip().endswith(nextline)
+
+
+class TestKilled(DebugTestCase):
+
+    def test_abort(self):
+        gdb.execute("set args -c 'import os; os.abort()'")
+        output = gdb.execute('cy run', to_string=True)
+        assert 'abort' in output.lower()
+
+
+class DebugStepperTestCase(DebugTestCase):
+
+    def step(self, varnames_and_values, source_line=None, lineno=None):
+        gdb.execute(self.command)
+        for varname, value in varnames_and_values:
+            self.assertEqual(self.read_var(varname), value, self.local_info())
+
+        self.lineno_equals(source_line, lineno)
+
+
+class TestStep(DebugStepperTestCase):
+    """
+    Test stepping. Stepping happens in the code found in
+    Cython/Debugger/Tests/codefile.
+    """
+
+    def test_cython_step(self):
+        gdb.execute('cy break codefile.spam')
+
+        gdb.execute('run', to_string=True)
+        self.lineno_equals('def spam(a=0):')
+
+        gdb.execute('cy step', to_string=True)
+        self.lineno_equals('b = c = d = 0')
+
+        self.command = 'cy step'
+        self.step([('b', 0)], source_line='b = 1')
+        self.step([('b', 1), ('c', 0)], source_line='c = 2')
+        self.step([('c', 2)], source_line='int(10)')
+        self.step([], source_line='puts("spam")')
+
+        gdb.execute('cont', to_string=True)
+        self.assertEqual(len(gdb.inferiors()), 1)
+        self.assertEqual(gdb.inferiors()[0].pid, 0)
+
+    def test_c_step(self):
+        self.break_and_run('some_c_function()')
+        gdb.execute('cy step', to_string=True)
+        self.assertEqual(gdb.selected_frame().name(), 'some_c_function')
+
+    def test_python_step(self):
+        self.break_and_run('os.path.join("foo", "bar")')
+
+        result = gdb.execute('cy step', to_string=True)
+
+        curframe = gdb.selected_frame()
+        self.assertEqual(curframe.name(), 'PyEval_EvalFrameEx')
+
+        pyframe = libpython.Frame(curframe).get_pyop()
+        # With Python 3 inferiors, pyframe.co_name will return a PyUnicodePtr,
+        # be compatible
+        frame_name = pyframe.co_name.proxyval(set())
+        self.assertEqual(frame_name, 'join')
+        assert re.match(r'\d+    def join\(', result), result
+
+
+class TestNext(DebugStepperTestCase):
+
+    def test_cython_next(self):
+        self.break_and_run('c = 2')
+
+        lines = (
+            'int(10)',
+            'puts("spam")',
+            'os.path.join("foo", "bar")',
+            'some_c_function()',
+        )
+
+        for line in lines:
+            gdb.execute('cy next')
+            self.lineno_equals(line)
+
+
+class TestLocalsGlobals(DebugTestCase):
+
+    def test_locals(self):
+        self.break_and_run('int(10)')
+
+        result = gdb.execute('cy locals', to_string=True)
+        assert 'a = 0', repr(result)
+        assert 'b = (int) 1', result
+        assert 'c = (int) 2' in result, repr(result)
+
+    def test_globals(self):
+        self.break_and_run('int(10)')
+
+        result = gdb.execute('cy globals', to_string=True)
+        assert '__name__ ' in result, repr(result)
+        assert '__doc__ ' in result, repr(result)
+        assert 'os ' in result, repr(result)
+        assert 'c_var ' in result, repr(result)
+        assert 'python_var ' in result, repr(result)
+
+
+class TestBacktrace(DebugTestCase):
+
+    def test_backtrace(self):
+        libcython.parameters.colorize_code.value = False
+
+        self.break_and_run('os.path.join("foo", "bar")')
+
+        def match_backtrace_output(result):
+            assert re.search(r'\#\d+ *0x.* in spam\(\) at .*codefile\.pyx:22',
+                             result), result
+            assert 'os.path.join("foo", "bar")' in result, result
+
+        result = gdb.execute('cy bt', to_string=True)
+        match_backtrace_output(result)
+
+        result = gdb.execute('cy bt -a', to_string=True)
+        match_backtrace_output(result)
+
+        # Apparently not everyone has main()
+        # assert re.search(r'\#0 *0x.* in main\(\)', result), result
+
+
+class TestFunctions(DebugTestCase):
+
+    def test_functions(self):
+        self.break_and_run('c = 2')
+        result = gdb.execute('print $cy_cname("b")', to_string=True)
+        assert re.search('__pyx_.*b', result), result
+
+        result = gdb.execute('print $cy_lineno()', to_string=True)
+        supposed_lineno = test_libcython.source_to_lineno['c = 2']
+        assert str(supposed_lineno) in result, (supposed_lineno, result)
+
+        result = gdb.execute('print $cy_cvalue("b")', to_string=True)
+        assert '= 1' in result
+
+
+class TestPrint(DebugTestCase):
+
+    def test_print(self):
+        self.break_and_run('c = 2')
+        result = gdb.execute('cy print b', to_string=True)
+        self.assertEqual('b = (int) 1\n', result)
+
+
+class TestUpDown(DebugTestCase):
+
+    def test_updown(self):
+        self.break_and_run('os.path.join("foo", "bar")')
+        gdb.execute('cy step')
+        self.assertRaises(RuntimeError, gdb.execute, 'cy down')
+
+        result = gdb.execute('cy up', to_string=True)
+        assert 'spam()' in result
+        assert 'os.path.join("foo", "bar")' in result
+
+
+class TestExec(DebugTestCase):
+
+    def setUp(self):
+        super(TestExec, self).setUp()
+        self.fd, self.tmpfilename = tempfile.mkstemp()
+        self.tmpfile = os.fdopen(self.fd, 'r+')
+
+    def tearDown(self):
+        super(TestExec, self).tearDown()
+
+        try:
+            self.tmpfile.close()
+        finally:
+            os.remove(self.tmpfilename)
+
+    def eval_command(self, command):
+        gdb.execute('cy exec open(%r, "w").write(str(%s))' %
+                                                (self.tmpfilename, command))
+        return self.tmpfile.read().strip()
+
+    def test_cython_exec(self):
+        self.break_and_run('os.path.join("foo", "bar")')
+
+        # test normal behaviour
+        self.assertEqual("[0]", self.eval_command('[a]'))
+
+        # test multiline code
+        result = gdb.execute(textwrap.dedent('''\
+            cy exec
+            pass
+
+            "nothing"
+            end
+            '''))
+        result = self.tmpfile.read().rstrip()
+        self.assertEqual('', result)
+
+    def test_python_exec(self):
+        self.break_and_run('os.path.join("foo", "bar")')
+        gdb.execute('cy step')
+
+        gdb.execute('cy exec some_random_var = 14')
+        self.assertEqual('14', self.eval_command('some_random_var'))
+
+
+class CySet(DebugTestCase):
+
+    def test_cyset(self):
+        self.break_and_run('os.path.join("foo", "bar")')
+
+        gdb.execute('cy set a = $cy_eval("{None: []}")')
+        stringvalue = self.read_var("a", cast_to=str)
+        self.assertEqual(stringvalue, "{None: []}")
+
+
+class TestCyEval(DebugTestCase):
+    "Test the $cy_eval() gdb function."
+
+    def test_cy_eval(self):
+        # This function leaks a few objects in the GDB python process. This
+        # is no biggie
+        self.break_and_run('os.path.join("foo", "bar")')
+
+        result = gdb.execute('print $cy_eval("None")', to_string=True)
+        assert re.match(r'\$\d+ = None\n', result), result
+
+        result = gdb.execute('print $cy_eval("[a]")', to_string=True)
+        assert re.match(r'\$\d+ = \[0\]', result), result
+
+
+class TestClosure(DebugTestCase):
+
+    def break_and_run_func(self, funcname):
+        gdb.execute('cy break ' + funcname)
+        gdb.execute('cy run')
+
+    def test_inner(self):
+        self.break_and_run_func('inner')
+        self.assertEqual('', gdb.execute('cy locals', to_string=True))
+
+        # Allow the Cython-generated code to initialize the scope variable
+        gdb.execute('cy step')
+
+        self.assertEqual(str(self.read_var('a')), "'an object'")
+        print_result = gdb.execute('cy print a', to_string=True).strip()
+        self.assertEqual(print_result, "a = 'an object'")
+
+    def test_outer(self):
+        self.break_and_run_func('outer')
+        self.assertEqual('', gdb.execute('cy locals', to_string=True))
+
+        # Initialize scope with 'a' uninitialized
+        gdb.execute('cy step')
+        self.assertEqual('', gdb.execute('cy locals', to_string=True))
+
+        # Initialize 'a' to 1
+        gdb.execute('cy step')
+        print_result = gdb.execute('cy print a', to_string=True).strip()
+        self.assertEqual(print_result, "a = 'an object'")
+
+
+_do_debug = os.environ.get('GDB_DEBUG')
+if _do_debug:
+    _debug_file = open('/dev/tty', 'w')
+
+def _debug(*messages):
+    if _do_debug:
+        messages = itertools.chain([sys._getframe(1).f_code.co_name, ':'],
+                                   messages)
+        _debug_file.write(' '.join(str(msg) for msg in messages) + '\n')
+
+
+def run_unittest_in_module(modulename):
+    try:
+        gdb.lookup_type('PyModuleObject')
+    except RuntimeError:
+        msg = ("Unable to run tests, Python was not compiled with "
+                "debugging information. Either compile python with "
+                "-g or get a debug build (configure with --with-pydebug).")
+        warnings.warn(msg)
+        os._exit(1)
+    else:
+        m = __import__(modulename, fromlist=[''])
+        tests = inspect.getmembers(m, inspect.isclass)
+
+        # test_support.run_unittest(tests)
+
+        test_loader = unittest.TestLoader()
+        suite = unittest.TestSuite(
+            [test_loader.loadTestsFromTestCase(cls) for name, cls in tests])
+
+        result = unittest.TextTestRunner(verbosity=1).run(suite)
+        return result.wasSuccessful()
+
+def runtests():
+    """
+    Run the libcython and libpython tests. Ensure that an appropriate status is
+    returned to the parent test process.
+    """
+    from Cython.Debugger.Tests import test_libpython_in_gdb
+
+    success_libcython = run_unittest_in_module(__name__)
+    success_libpython = run_unittest_in_module(test_libpython_in_gdb.__name__)
+
+    if not success_libcython or not success_libpython:
+        sys.exit(2)
+
+def main(version, trace_code=False):
+    global inferior_python_version
+
+    inferior_python_version = version
+
+    if trace_code:
+        tracer = trace.Trace(count=False, trace=True, outfile=sys.stderr,
+                            ignoredirs=[sys.prefix, sys.exec_prefix])
+        tracer.runfunc(runtests)
+    else:
+        runtests()
diff --git a/contrib/tools/cython/Cython/Debugger/Tests/test_libpython_in_gdb.py b/contrib/tools/cython/Cython/Debugger/Tests/test_libpython_in_gdb.py
new file mode 100644
index 0000000000..6f34cee47b
--- /dev/null
+++ b/contrib/tools/cython/Cython/Debugger/Tests/test_libpython_in_gdb.py
@@ -0,0 +1,115 @@
+# -*- coding: UTF-8 -*-
+
+"""
+Test libpython.py. This is already partly tested by test_libcython_in_gdb and
+Lib/test/test_gdb.py in the Python source. These tests are run in gdb and
+called from test_libcython_in_gdb.main()
+"""
+
+import os
+import sys
+
+import gdb
+
+from Cython.Debugger import libcython
+from Cython.Debugger import libpython
+
+from . import test_libcython_in_gdb
+from .test_libcython_in_gdb import _debug, inferior_python_version
+
+
+class TestPrettyPrinters(test_libcython_in_gdb.DebugTestCase):
+    """
+    Test whether types of Python objects are correctly inferred and that
+    the right libpython.PySomeTypeObjectPtr classes are instantiated.
+
+    Also test whether values are appropriately formatted (don't be too
+    laborious as Lib/test/test_gdb.py already covers this extensively).
+
+    Don't take care of decreffing newly allocated objects as a new
+    interpreter is started for every test anyway.
+    """
+
+    def setUp(self):
+        super(TestPrettyPrinters, self).setUp()
+        self.break_and_run('b = c = d = 0')
+
+    def get_pyobject(self, code):
+        value = gdb.parse_and_eval(code)
+        assert libpython.pointervalue(value) != 0
+        return value
+
+    def pyobject_fromcode(self, code, gdbvar=None):
+        if gdbvar is not None:
+            d = {'varname':gdbvar, 'code':code}
+            gdb.execute('set $%(varname)s = %(code)s' % d)
+            code = '$' + gdbvar
+
+        return libpython.PyObjectPtr.from_pyobject_ptr(self.get_pyobject(code))
+
+    def get_repr(self, pyobject):
+        return pyobject.get_truncated_repr(libpython.MAX_OUTPUT_LEN)
+
+    def alloc_bytestring(self, string, gdbvar=None):
+        if inferior_python_version < (3, 0):
+            funcname = 'PyString_FromStringAndSize'
+        else:
+            funcname = 'PyBytes_FromStringAndSize'
+
+        assert b'"' not in string
+
+        # ensure double quotes
+        code = '(PyObject *) %s("%s", %d)' % (funcname, string.decode('iso8859-1'), len(string))
+        return self.pyobject_fromcode(code, gdbvar=gdbvar)
+
+    def alloc_unicodestring(self, string, gdbvar=None):
+        postfix = libpython.get_inferior_unicode_postfix()
+        funcname = 'PyUnicode%s_DecodeUnicodeEscape' % (postfix,)
+
+        data = string.encode("unicode_escape").decode('iso8859-1')
+        return self.pyobject_fromcode(
+            '(PyObject *) %s("%s", %d, "strict")' % (
+                funcname, data.replace('"', r'\"').replace('\\', r'\\'), len(data)),
+            gdbvar=gdbvar)
+
+    def test_bytestring(self):
+        bytestring = self.alloc_bytestring(b"spam")
+
+        if inferior_python_version < (3, 0):
+            bytestring_class = libpython.PyStringObjectPtr
+            expected = repr(b"spam")
+        else:
+            bytestring_class = libpython.PyBytesObjectPtr
+            expected = "b'spam'"
+
+        self.assertEqual(type(bytestring), bytestring_class)
+        self.assertEqual(self.get_repr(bytestring), expected)
+
+    def test_unicode(self):
+        unicode_string = self.alloc_unicodestring(u"spam ἄλφα")
+
+        expected = u"'spam ἄλφα'"
+        if inferior_python_version < (3, 0):
+            expected = 'u' + expected
+
+        self.assertEqual(type(unicode_string), libpython.PyUnicodeObjectPtr)
+        self.assertEqual(self.get_repr(unicode_string), expected)
+
+    def test_int(self):
+        if inferior_python_version < (3, 0):
+            intval = self.pyobject_fromcode('PyInt_FromLong(100)')
+            self.assertEqual(type(intval), libpython.PyIntObjectPtr)
+            self.assertEqual(self.get_repr(intval), '100')
+
+    def test_long(self):
+        longval = self.pyobject_fromcode('PyLong_FromLong(200)',
+                                         gdbvar='longval')
+        assert gdb.parse_and_eval('$longval->ob_type == &PyLong_Type')
+
+        self.assertEqual(type(longval), libpython.PyLongObjectPtr)
+        self.assertEqual(self.get_repr(longval), '200')
+
+    def test_frame_type(self):
+        frame = self.pyobject_fromcode('PyEval_GetFrame()')
+
+        self.assertEqual(type(frame), libpython.PyFrameObjectPtr)