80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
# (c) Copyright 2021 by Coinkite Inc. This file is covered by license found in COPYING-CC.
|
|
#
|
|
# imptask.py -- important async tasks that shouldn't die
|
|
#
|
|
import sys, uasyncio, ckcc
|
|
|
|
def die_with_debug(exc):
|
|
try:
|
|
is_debug = ckcc.vcp_enabled(None) or ckcc.is_debug_build()
|
|
except:
|
|
# robustness
|
|
is_debug = False
|
|
|
|
if is_debug and isinstance(exc, KeyboardInterrupt):
|
|
# preserve GUI state, but want to see where we are
|
|
print("KeyboardInterrupt")
|
|
raise exc
|
|
elif isinstance(exc, SystemExit):
|
|
# Ctrl-D and warm reboot cause this, not bugs
|
|
raise exc
|
|
else:
|
|
# show stacktrace for debug photos
|
|
try:
|
|
import uio, ux
|
|
tmp = uio.StringIO()
|
|
sys.print_exception(exc, tmp)
|
|
msg = tmp.getvalue()
|
|
del tmp
|
|
print(msg)
|
|
ux.show_fatal_error(msg)
|
|
except: pass
|
|
|
|
# securely die (wipe memory)
|
|
if not is_debug:
|
|
try:
|
|
import callgate
|
|
callgate.show_logout(1)
|
|
except: pass
|
|
|
|
class ImportantTask:
|
|
def __init__(self):
|
|
self.tasks = dict()
|
|
|
|
uasyncio.get_event_loop().set_exception_handler(self.handle_exc)
|
|
|
|
def handle_exc(self, loop, context):
|
|
# Unhandled exception in a task.
|
|
task = context['future']
|
|
|
|
# See if it matters: some tasks are short-lived and exception in them
|
|
# may not be fatal or even serious
|
|
for name, t in self.tasks.items():
|
|
if t == task:
|
|
print("Panic stop: %r has died" % name)
|
|
die_with_debug(context["exception"])
|
|
# not reached, except on simulator:
|
|
break
|
|
else:
|
|
# uncaught exception in an unnamed (and unimportant) task
|
|
print("UNNAMED: " + context["message"])
|
|
sys.print_exception(context["exception"]) # VERY USEFUL on sim
|
|
#print("... future: %r" % context.get("future", '?'))
|
|
|
|
def start_task(self, name, awaitable):
|
|
# start a critical task and watch for it to never die
|
|
print("Start: %s" % name)
|
|
task = uasyncio.create_task(awaitable)
|
|
self.tasks[name] = task
|
|
return task
|
|
|
|
def task_name(self, t):
|
|
for k, v in self.tasks.items():
|
|
if v == t:
|
|
return k
|
|
return None
|
|
|
|
IMPT = ImportantTask()
|
|
|
|
# EOF
|