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Debug.py
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Debug.py
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import os
import sys
global_exclude_thread_ids = set()
def auto_exclude_all_new_threads(func):
def wrapped(*args, **kwargs):
old_threads = set(sys._current_frames().keys())
res = func(*args, **kwargs)
new_threads = set(sys._current_frames().keys())
new_threads -= old_threads
global_exclude_thread_ids.update(new_threads)
return res
return wrapped
def dumpAllThreadTracebacks(exclude_thread_ids=set()):
import better_exchook
import threading
if hasattr(sys, "_current_frames"):
print ""
threads = {t.ident: t for t in threading.enumerate()}
for tid, stack in sys._current_frames().items():
if tid in exclude_thread_ids: continue
# This is a bug in earlier Python versions.
# http://bugs.python.org/issue17094
# Note that this leaves out all threads not created via the threading module.
if tid not in threads: continue
print "Thread %s:" % threads.get(tid, "unnamed with id %i" % tid)
if tid in global_exclude_thread_ids:
print "(Auto-ignored traceback.)"
else:
better_exchook.print_tb(stack)
print ""
else:
print "Does not have sys._current_frames, cannot get thread tracebacks."
def initBetterExchook():
import thread
import threading
import better_exchook
import pdb
def excepthook(exc_type, exc_obj, exc_tb):
try:
is_main_thread = isinstance(threading.currentThread(), threading._MainThread)
except Exception: # Can happen at a very late state while quitting.
if exc_type is KeyboardInterrupt:
return
else:
if is_main_thread:
if exc_type is KeyboardInterrupt and getattr(sys, "exited", False):
# Got SIGINT twice. Can happen.
return
# An unhandled exception in the main thread. This means that we are going to quit now.
sys.exited = True
print "Unhandled exception %s in thread %s, proc %i." % (exc_type, threading.currentThread(), os.getpid())
if exc_type is KeyboardInterrupt:
return
if isinstance(threading.currentThread(), threading._MainThread):
main_thread_id = thread.get_ident()
if not isinstance(exc_type, Exception):
# We are the main thread and we got an exit-exception. This is likely fatal.
# This usually means an exit. (We ignore non-daemon threads and procs here.)
# Print the stack of all other threads.
dumpAllThreadTracebacks({main_thread_id})
better_exchook.better_exchook(exc_type, exc_obj, exc_tb)
sys.excepthook = excepthook
def initFaulthandler(sigusr1_chain=False):
"""
:param bool sigusr1_chain: whether the default SIGUSR1 handler should also be called.
"""
try:
import faulthandler
except ImportError, e:
print "faulthandler import error. %s" % e
return
# Only enable if not yet enabled -- otherwise, leave it in its current state.
if not faulthandler.is_enabled():
faulthandler.enable()
if os.name != 'nt':
import signal
faulthandler.register(signal.SIGUSR1, all_threads=True, chain=sigusr1_chain)
@auto_exclude_all_new_threads
def initIPythonKernel():
# You can remotely connect to this kernel. See the output on stdout.
try:
import IPython.kernel.zmq.ipkernel
from IPython.kernel.zmq.ipkernel import Kernel
from IPython.kernel.zmq.heartbeat import Heartbeat
from IPython.kernel.zmq.session import Session
from IPython.kernel import write_connection_file
import zmq
from zmq.eventloop import ioloop
from zmq.eventloop.zmqstream import ZMQStream
IPython.kernel.zmq.ipkernel.signal = lambda sig, f: None # Overwrite.
except ImportError, e:
print "IPython import error, cannot start IPython kernel. %s" % e
return
import atexit
import socket
import logging
import threading
# Do in mainthread to avoid history sqlite DB errors at exit.
# https://github.com/ipython/ipython/issues/680
assert isinstance(threading.currentThread(), threading._MainThread)
try:
ip = socket.gethostbyname(socket.gethostname())
connection_file = "ipython-kernel-%s-%s.json" % (ip, os.getpid())
def cleanup_connection_file():
try:
os.remove(connection_file)
except (IOError, OSError):
pass
atexit.register(cleanup_connection_file)
logger = logging.Logger("IPython")
logger.addHandler(logging.NullHandler())
session = Session(username=u'kernel')
context = zmq.Context.instance()
transport = "tcp"
addr = "%s://%s" % (transport, ip)
shell_socket = context.socket(zmq.ROUTER)
shell_port = shell_socket.bind_to_random_port(addr)
iopub_socket = context.socket(zmq.PUB)
iopub_port = iopub_socket.bind_to_random_port(addr)
control_socket = context.socket(zmq.ROUTER)
control_port = control_socket.bind_to_random_port(addr)
hb_ctx = zmq.Context()
heartbeat = Heartbeat(hb_ctx, (transport, ip, 0))
hb_port = heartbeat.port
heartbeat.start()
shell_stream = ZMQStream(shell_socket)
control_stream = ZMQStream(control_socket)
kernel = Kernel(session=session,
shell_streams=[shell_stream, control_stream],
iopub_socket=iopub_socket,
log=logger)
write_connection_file(connection_file,
shell_port=shell_port, iopub_port=iopub_port, control_port=control_port, hb_port=hb_port,
ip=ip)
#print "To connect another client to this IPython kernel, use:", \
# "ipython console --existing %s" % connection_file
except Exception, e:
print "Exception while initializing IPython ZMQ kernel. %s" % e
return
def ipython_thread():
kernel.start()
try:
ioloop.IOLoop.instance().start()
except KeyboardInterrupt:
pass
thread = threading.Thread(target=ipython_thread, name="IPython kernel")
thread.daemon = True
thread.start()
def initCudaNotInMainProcCheck():
import TaskSystem
import theano.sandbox.cuda as cuda
if cuda.use.device_number is not None:
print "CUDA already initialized in proc", os.getpid()
return
use_original = cuda.use
def use_wrapped(device, **kwargs):
print "CUDA.use", device, "in proc", os.getpid()
#assert not TaskSystem.isMainProcess, "multiprocessing is set to True in your config but the main proc tries to use CUDA"
use_original(device=device, **kwargs)
cuda.use = use_wrapped
cuda.use.device_number = None
def debug_shell(user_ns=None, user_global_ns=None, exit_afterwards=True):
print "Debug shell:"
from Util import ObjAsDict
import DebugHelpers
user_global_ns_new = dict(ObjAsDict(DebugHelpers).items())
if user_global_ns:
user_global_ns_new.update(user_global_ns) # may overwrite vars from DebugHelpers
user_global_ns_new["debug"] = DebugHelpers # make this available always
print "Available debug functions/utils (via DebugHelpers):"
for k, v in sorted(vars(DebugHelpers).items()):
if k[:1] == "_": continue
print " %s (%s)" % (k, type(v))
print "Also DebugHelpers available as 'debug'."
if not user_ns:
user_ns = {}
if user_ns:
print "Locals:"
for k, v in sorted(user_ns.items()):
print " %s (%s)" % (k, type(v))
import better_exchook
better_exchook.debug_shell(user_ns, user_global_ns_new)
if exit_afterwards:
print "Debug shell exit. Exit now."
sys.exit(1)