Stefan Krah <ste...@bytereef.org> added the comment:
Also _pydecimal was affected. This is a modified version of Evgeny's
test case:
from _pydecimal import *
from time import sleep
from random import randint
import sys
sys.setswitchinterval(0.0000001)
def usleep(x):
sleep(x/1000000.0)
class Test:
def __init__(self, threadno):
self.threadno = threadno
def GetCallback(self):
usleep(randint(0, 9));
setcontext(Context(Emax=self.threadno))
usleep(randint(0, 9))
c = getcontext()
try:
if c.Emax != self.threadno:
raise RuntimeError("GetCallback: another thread changed this
thread's context")
except AttributeError:
raise RuntimeError("GetCallback: type(c)==%s and c.Emax
disappeared" % type(c))
usleep(randint(0, 9))
return self.Callback
def Callback(self):
c = getcontext()
try:
c.Emax = self.threadno
except AttributeError:
raise RuntimeError("Callback: type(c)==%s and c.Emax disappeared" %
type(c))
def DoTest(threadno):
return Test(threadno).GetCallback()
It produces one of the exceptions or a segfault. You may have
to build in release mode to get the race.
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39776>
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