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from rpython.rlib import rgil
from rpython.rlib.debug import debug_print
from rpython.translator.c.test.test_standalone import StandaloneTests
from rpython.config.translationoption import get_combined_translation_config
class BaseTestGIL(StandaloneTests):
def test_simple(self):
def main(argv):
rgil.release()
# don't have the GIL here
rgil.acquire()
rgil.yield_thread()
print "OK" # there is also a release/acquire pair here
return 0
main([])
t, cbuilder = self.compile(main)
data = cbuilder.cmdexec('')
assert data == "OK\n"
def test_after_thread_switch(self):
class Foo:
pass
foo = Foo()
foo.counter = 0
def seeme():
foo.counter += 1
def main(argv):
rgil.invoke_after_thread_switch(seeme)
print "Test" # one release/acquire pair here
print foo.counter
print foo.counter
return 0
t, cbuilder = self.compile(main)
data = cbuilder.cmdexec('')
assert data == "Test\n1\n2\n"
def test_am_I_holding_the_GIL(self):
def check(name, expected=True):
# we may not have the GIL here, don't use "print"
debug_print(name)
if rgil.am_I_holding_the_GIL() != expected:
debug_print('assert failed at point', name)
debug_print('rgil.gil_get_holder() ==', rgil.gil_get_holder())
assert False
def main(argv):
check('1')
rgil.release()
# don't have the GIL here
check('2', False)
rgil.acquire()
check('3')
rgil.yield_thread()
check('4')
print "OK" # there is also a release/acquire pair here
check('5')
return 0
main([])
t, cbuilder = self.compile(main)
data = cbuilder.cmdexec('')
assert data == "OK\n"
def test_multiple_threads(self):
import time, random
from rpython.rlib import rthread
def check(name, nextop, expected=True):
# we may not have the GIL here, don't use "print"
if rgil.am_I_holding_the_GIL() != expected:
debug_print('assert failed at point', name, 'at', nextop)
debug_print('rgil.gil_get_holder() ==', rgil.gil_get_holder())
assert False
seed = int(time.time())
print "Random seed:", seed
random.seed(seed)
# This is just a complicated way of simulating random work.
# We randomly release the GIL in various ways from 4 different threads
# and check that at least rgil.am_I_holding_the_GIL() is sane.
OP_YIELD = 0
OP_RELEASE_AND_ACQUIRE = 1
OP_BUSY = 2 # without releasing the GIL
OP_SLEEP = 3 # time.sleep() always releases the GIL
OPS = [OP_YIELD, OP_RELEASE_AND_ACQUIRE, OP_BUSY, OP_SLEEP]
N_THREADS = 4
ops_by_thread = []
for i in range(N_THREADS):
ops = []
for j in range(10000):
op = random.choice(OPS)
ops.append(op)
if op >= 2:
ops.append(random.randint(0, 1000))
ops_by_thread.append(ops)
class Glob:
def __init__(self):
self.my_locks = []
self.n_threads = 0
glob = Glob()
def do_random_work():
thread_index = glob.n_threads
glob.n_threads += 1
ops = ops_by_thread[thread_index]
nextop = 0
while nextop < len(ops):
op = ops[nextop]
nextop += 1
if op == OP_YIELD:
rgil.yield_thread()
check("after yield", nextop)
elif op == OP_RELEASE_AND_ACQUIRE:
rgil.release()
check("after release_gil", nextop, expected=False)
rgil.acquire()
check("after acquire_gil", nextop)
else:
arg = ops[nextop]
nextop += 1
if op == OP_BUSY:
end_time = time.time() + arg * 1e-6
while time.time() < end_time:
pass
check("after busy work", nextop)
else:
time.sleep(arg * 1e-6)
check("after time.sleep()", nextop)
finish_lock = glob.my_locks[thread_index]
finish_lock.release()
def main(argv):
for j in range(N_THREADS):
lock = rthread.allocate_lock()
lock.acquire(True)
glob.my_locks.append(lock)
for j in range(N_THREADS):
rthread.start_new_thread(do_random_work, ())
for j in range(N_THREADS):
glob.my_locks[j].acquire(True)
print "OK"
return 0
self.config = get_combined_translation_config(
overrides={"translation.thread": True})
t, cbuilder = self.compile(main)
data = cbuilder.cmdexec('')
assert data == "OK\n"
class TestGILShadowStack(BaseTestGIL):
gc = 'minimark'
gcrootfinder = 'shadowstack'
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