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'''
Support for parsing strings containing gdb backtraces, turning them into classes
'''
import re
class Frame(object):
'''
Class representing a stack frame of a thread within a backtrace
'''
def __init__(self, index, address, function, info):
self.index = index
self.address = address
self.function = function
self.info = info
class Thread(object):
'''
Class representing a thread within a backtrace
'''
def __init__(self, index, extra):
self.index = index
self.extra = extra
self.frames = {}
self.framelist = []
class Backtrace(object):
'''
Class representing a parsed backtrace
'''
def __init__(self, string, debug=False):
'''
Parse the given string (from gdb)
'''
self._string = string
#if debug:
# print string
self._crash_site = None
self._thread = None
self._threads = {}
self._frame = None
for line in string.splitlines():
if debug:
print 'GOT LINE: %r' % line
m = re.match('^Thread ([0-9]+) \(Thread (.*)\):$', line)
if m:
if debug:
print 'THREAD START:', m.groups()
self._thread = Thread(int(m.group(1)),
m.group(2))
self._threads[self._thread.index] = self._thread
self._frame = None
continue
m = re.match('^#([0-9]+)\s+(?:0x([0-9a-f]+) in)? (\S+) (.*)$', line)
if m:
if debug:
print 'STACK FRAME:', m.groups()
#print m.groups()
if m.group(2):
address = int(m.group(2), 16)
else:
address = None
f = Frame(int(m.group(1)),
address,
m.group(3),
m.group(4))
if self._thread is None:
if debug:
print 'GOT CRASH SITE'
self._crash_site = f
self._frame = None
continue
else:
self._thread.frames[f.index] = f
self._thread.framelist.append(f)
self._frame = f
continue
if line.startswith(' '):
if self._frame:
self._frame.info += '\n' + line
#pprint(self._threads[5].frames[6].__dict__)
def get_crash_site(self):
'''Get a (Thread, Frame) pair for where the crash happened (or None)'''
debug = False
if debug:
print self._crash_site.__dict__
for t in self._threads.values():
if debug:
print t
if 0 in t.frames:
if debug:
print t.frames[0].__dict__
if t.frames[0].address == self._crash_site.address:
return (t, t.frames[0])
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