def get_source_desc(self, frame):
filename = lineno = lexer = None
if self.is_cython_function(frame):
filename = self.get_cython_function(frame).module.filename
lineno = self.get_cython_lineno(frame)
if pygments:
lexer = pygments.lexers.CythonLexer(stripall=False)
elif self.is_python_function(frame):
pyframeobject = libpython.Frame(frame).get_pyop()
if not pyframeobject:
raise gdb.GdbError(
'Unable to read information on python frame')
filename = pyframeobject.filename()
lineno = pyframeobject.current_line_num()
if pygments:
lexer = pygments.lexers.PythonLexer(stripall=False)
else:
symbol_and_line_obj = frame.find_sal()
if not symbol_and_line_obj or not symbol_and_line_obj.symtab:
filename = None
lineno = 0
else:
filename = symbol_and_line_obj.symtab.fullname()
lineno = symbol_and_line_obj.line
if pygments:
lexer = pygments.lexers.CLexer(stripall=False)
return SourceFileDescriptor(filename, lexer), lineno
def print_stackframe(self, frame, index, is_c=False):
"""
Print a C, Cython or Python stack frame and the line of source code
if available.
"""
# do this to prevent the require_cython_frame decorator from
# raising GdbError when calling self.cy.cy_cvalue.invoke()
selected_frame = gdb.selected_frame()
frame.select()
try:
source_desc, lineno = self.get_source_desc(frame)
except NoFunctionNameInFrameError:
print '#%-2d Unknown Frame (compile with -g)' % index
return
if not is_c and self.is_python_function(frame):
pyframe = libpython.Frame(frame).get_pyop()
if pyframe is None or pyframe.is_optimized_out():
# print this python function as a C function
return self.print_stackframe(frame, index, is_c=True)
func_name = pyframe.co_name
func_cname = 'PyEval_EvalFrameEx'
func_args = []
elif self.is_cython_function(frame):
cyfunc = self.get_cython_function(frame)
f = lambda arg: self.cy.cy_cvalue.invoke(arg, frame=frame)
func_name = cyfunc.name
func_cname = cyfunc.cname
func_args = [] # [(arg, f(arg)) for arg in cyfunc.arguments]
else:
source_desc, lineno = self.get_source_desc(frame)
func_name = frame.name()
func_cname = func_name
func_args = []
try:
gdb_value = gdb.parse_and_eval(func_cname)
except RuntimeError:
func_address = 0
else:
# Seriously? Why is the address not an int?
func_address = int(str(gdb_value.address).split()[0], 0)
a = ', '.join('%s=%s' % (name, val) for name, val in func_args)
print '#%-2d 0x%016x in %s(%s)' % (index, func_address, func_name, a),
if source_desc.filename is not None:
print 'at %s:%s' % (source_desc.filename, lineno),
print
try:
print ' ' + source_desc.get_source(lineno)
except gdb.GdbError:
pass
selected_frame.select()
def is_python_function(self, frame):
"""
Tells if a frame is associated with a Python function.
If we can't read the Python frame information, don't regard it as such.
"""
if frame.name() == 'PyEval_EvalFrameEx':
pyframe = libpython.Frame(frame).get_pyop()
return pyframe and not pyframe.is_optimized_out()
return False
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
def print_stackframe(self, frame, index, is_c=False):
if not is_c and self.is_python_function(frame):
pyframe = libpython.Frame(frame).get_pyop()
if pyframe is None or pyframe.is_optimized_out():
# print this python function as a C function
return self.print_stackframe(frame, index, is_c=True)
func_name = pyframe.co_name
func_cname = 'PyEval_EvalFrameEx'
func_args = []
elif self.is_cython_function(frame):
cyfunc = self.get_cython_function(frame)
# f = lambda arg: self.cy.cy_cvalue.invoke(arg, frame=frame)
func_name = cyfunc.name
func_cname = cyfunc.cname
func_args = [] # [(arg, f(arg)) for arg in cyfunc.arguments]
else:
func_name = frame.name()
func_cname = func_name
func_args = []
try:
gdb_value = gdb.parse_and_eval(func_cname)
except (RuntimeError, TypeError):
func_address = 0
else:
func_address = int(str(gdb_value.address).split()[0], 0)
out = '#%-2d 0x%016x' % (index, func_address)
try:
a = ', '.join('%s=%s' % (name, val) for name, val in func_args)
out += ' in %s (%s)' % (func_name or "??", a)
source_desc, lineno = self.get_source_desc(frame)
if source_desc.filename is not None:
out += ' at %s:%s' % (source_desc.filename, lineno)
except Exception:
return
finally:
print(out)
try:
source = source_desc.get_source(lineno - 5,
lineno + 5,
mark_line=lineno,
lex_entire=True)
print(source)
except gdb.GdbError:
pass
