Adding cython v0.20.2 in third-party.

third_party/cython/src/Cython/Debugger/Tests/test_libcython_in_gdb.py

+"""
+Tests that run inside GDB.
+
+Note: debug information is already imported by the file generated by
+Cython.Debugger.Cygdb.make_command_file()
+"""
+
+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 Cython.Debugger import libcython
+from Cython.Debugger import libpython
+from Cython.Debugger.Tests import TestLibCython as test_libcython
+
+# 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, e:
+            _debug("An exception occurred:", traceback.format_exc(e))
+            raise
+
+    return wrapper
+
+class TraceMethodCallMeta(type):
+
+    def __init__(self, name, bases, dict):
+        for func_name, func in dict.iteritems():
+            if inspect.isfunction(func):
+                setattr(self, func_name, print_on_call_decorator(func))
+
+
+class DebugTestCase(unittest.TestCase):
+    """
+    Base class for test cases. On teardown it kills the inferior and unsets
+    all breakpoints.
+    """
+
+    __metaclass__ = TraceMethodCallMeta
+
+    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()