mirror of
https://github.com/python/cpython.git
synced 2026-04-20 10:51:00 +00:00
234 lines
11 KiB
Python
234 lines
11 KiB
Python
import contextlib
|
|
import sys
|
|
import unittest
|
|
from test import support
|
|
from test.support import import_helper
|
|
from test.support import os_helper
|
|
|
|
resource = import_helper.import_module('resource')
|
|
|
|
# This test is checking a few specific problem spots with the resource module.
|
|
|
|
class ResourceTest(unittest.TestCase):
|
|
|
|
def test_args(self):
|
|
self.assertRaises(TypeError, resource.getrlimit)
|
|
self.assertRaises(TypeError, resource.getrlimit, 0, 42)
|
|
self.assertRaises(OverflowError, resource.getrlimit, 2**1000)
|
|
self.assertRaises(OverflowError, resource.getrlimit, -2**1000)
|
|
self.assertRaises(TypeError, resource.getrlimit, '0')
|
|
self.assertRaises(TypeError, resource.setrlimit)
|
|
self.assertRaises(TypeError, resource.setrlimit, 0)
|
|
self.assertRaises(TypeError, resource.setrlimit, 0, 42)
|
|
self.assertRaises(TypeError, resource.setrlimit, 0, 42, 42)
|
|
self.assertRaises(OverflowError, resource.setrlimit, 2**1000, (42, 42))
|
|
self.assertRaises(OverflowError, resource.setrlimit, -2**1000, (42, 42))
|
|
self.assertRaises(ValueError, resource.setrlimit, 0, (42,))
|
|
self.assertRaises(ValueError, resource.setrlimit, 0, (42, 42, 42))
|
|
self.assertRaises(TypeError, resource.setrlimit, '0', (42, 42))
|
|
self.assertRaises(TypeError, resource.setrlimit, 0, ('42', 42))
|
|
self.assertRaises(TypeError, resource.setrlimit, 0, (42, '42'))
|
|
|
|
@unittest.skipIf(sys.platform == "vxworks",
|
|
"setting RLIMIT_FSIZE is not supported on VxWorks")
|
|
@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
|
|
def test_fsize_ismax(self):
|
|
(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
|
|
# RLIMIT_FSIZE should be RLIM_INFINITY, which will be a really big
|
|
# number on a platform with large file support. On these platforms,
|
|
# we need to test that the get/setrlimit functions properly convert
|
|
# the number to a C long long and that the conversion doesn't raise
|
|
# an error.
|
|
self.assertGreater(resource.RLIM_INFINITY, 0)
|
|
self.assertGreaterEqual(max, 0)
|
|
self.assertLessEqual(cur, max)
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (max, max))
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
|
|
|
|
@unittest.skipIf(sys.platform == "vxworks",
|
|
"setting RLIMIT_FSIZE is not supported on VxWorks")
|
|
@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
|
|
def test_fsize_enforced(self):
|
|
self.addCleanup(os_helper.unlink, os_helper.TESTFN)
|
|
try:
|
|
(cur, max_lim) = resource.getrlimit(resource.RLIMIT_FSIZE)
|
|
except OSError as e:
|
|
self.skipTest(f"getrlimit(RLIMIT_FSIZE) failed: {e}")
|
|
if max_lim != resource.RLIM_INFINITY and max_lim < 1025:
|
|
self.skipTest(f"system RLIMIT_FSIZE hard limit ({max_lim}) is too small for this test")
|
|
with open(os_helper.TESTFN, "wb", buffering=0) as f:
|
|
try:
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (1024, max_lim))
|
|
f.write(b"X" * 1024)
|
|
with self.assertRaises(OSError, msg="f.write() did not raise OSError when exceeding RLIMIT_FSIZE"):
|
|
f.write(b"Y")
|
|
f.flush()
|
|
finally:
|
|
# Close will attempt to flush the byte we wrote
|
|
# Restore limit first to avoid getting a spurious error
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max_lim))
|
|
|
|
@unittest.skipIf(sys.platform == "vxworks",
|
|
"setting RLIMIT_FSIZE is not supported on VxWorks")
|
|
@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
|
|
def test_fsize_too_big(self):
|
|
# Be sure that setrlimit is checking for really large values
|
|
too_big = 10**50
|
|
(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
|
|
try:
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (too_big, max))
|
|
except (OverflowError, ValueError):
|
|
pass
|
|
try:
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (max, too_big))
|
|
except (OverflowError, ValueError):
|
|
pass
|
|
|
|
@unittest.skipIf(sys.platform == "vxworks",
|
|
"setting RLIMIT_FSIZE is not supported on VxWorks")
|
|
@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
|
|
def test_fsize_not_too_big(self):
|
|
(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
|
|
self.addCleanup(resource.setrlimit, resource.RLIMIT_FSIZE, (cur, max))
|
|
|
|
def expected(cur):
|
|
# The glibc wrapper functions use a 64-bit rlim_t data type,
|
|
# even on 32-bit platforms. If a program tried to set a resource
|
|
# limit to a value larger than can be represented in a 32-bit
|
|
# unsigned long, then the glibc setrlimit() wrapper function
|
|
# silently converted the limit value to RLIM_INFINITY.
|
|
if sys.maxsize < 2**32 <= cur <= resource.RLIM_INFINITY:
|
|
return [(resource.RLIM_INFINITY, max), (cur, max)]
|
|
return [(min(cur, resource.RLIM_INFINITY), max)]
|
|
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (2**31-5, max))
|
|
self.assertEqual(resource.getrlimit(resource.RLIMIT_FSIZE), (2**31-5, max))
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (2**31, max))
|
|
self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**31))
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (2**32-5, max))
|
|
self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**32-5))
|
|
|
|
try:
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (2**32, max))
|
|
except OverflowError:
|
|
pass
|
|
else:
|
|
self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**32))
|
|
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (2**63-5, max))
|
|
self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**63-5))
|
|
try:
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (2**63, max))
|
|
except ValueError:
|
|
# There is a hard limit on macOS.
|
|
pass
|
|
else:
|
|
self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**63))
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (2**64-5, max))
|
|
self.assertIn(resource.getrlimit(resource.RLIMIT_FSIZE), expected(2**64-5))
|
|
|
|
@unittest.skipIf(sys.platform == "vxworks",
|
|
"setting RLIMIT_FSIZE is not supported on VxWorks")
|
|
@unittest.skipUnless(hasattr(resource, 'RLIMIT_FSIZE'), 'requires resource.RLIMIT_FSIZE')
|
|
def test_fsize_negative(self):
|
|
self.assertGreater(resource.RLIM_INFINITY, 0)
|
|
(cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
|
|
for value in -5, -2**31, -2**32-5, -2**63, -2**64-5, -2**1000:
|
|
with self.subTest(value=value):
|
|
self.assertRaises(ValueError, resource.setrlimit, resource.RLIMIT_FSIZE, (value, max))
|
|
self.assertRaises(ValueError, resource.setrlimit, resource.RLIMIT_FSIZE, (cur, value))
|
|
|
|
if resource.RLIM_INFINITY in (2**32-3, 2**32-1, 2**64-3, 2**64-1):
|
|
value = (resource.RLIM_INFINITY & 0xffff) - 0x10000
|
|
with self.assertWarnsRegex(DeprecationWarning, "RLIM_INFINITY"):
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (value, max))
|
|
with self.assertWarnsRegex(DeprecationWarning, "RLIM_INFINITY"):
|
|
resource.setrlimit(resource.RLIMIT_FSIZE, (cur, value))
|
|
|
|
|
|
@unittest.skipUnless(hasattr(resource, "getrusage"), "needs getrusage")
|
|
def test_getrusage(self):
|
|
self.assertRaises(TypeError, resource.getrusage)
|
|
self.assertRaises(TypeError, resource.getrusage, 42, 42)
|
|
usageself = resource.getrusage(resource.RUSAGE_SELF)
|
|
usagechildren = resource.getrusage(resource.RUSAGE_CHILDREN)
|
|
# May not be available on all systems.
|
|
try:
|
|
usageboth = resource.getrusage(resource.RUSAGE_BOTH)
|
|
except (ValueError, AttributeError):
|
|
pass
|
|
try:
|
|
usage_thread = resource.getrusage(resource.RUSAGE_THREAD)
|
|
except (ValueError, AttributeError):
|
|
pass
|
|
|
|
# Issue 6083: Reference counting bug
|
|
@unittest.skipIf(sys.platform == "vxworks",
|
|
"setting RLIMIT_CPU is not supported on VxWorks")
|
|
@unittest.skipUnless(hasattr(resource, 'RLIMIT_CPU'), 'requires resource.RLIMIT_CPU')
|
|
def test_setrusage_refcount(self):
|
|
limits = resource.getrlimit(resource.RLIMIT_CPU)
|
|
class BadSequence:
|
|
def __len__(self):
|
|
return 2
|
|
def __getitem__(self, key):
|
|
if key in (0, 1):
|
|
return len(tuple(range(1000000)))
|
|
raise IndexError
|
|
|
|
resource.setrlimit(resource.RLIMIT_CPU, BadSequence())
|
|
|
|
def test_pagesize(self):
|
|
pagesize = resource.getpagesize()
|
|
self.assertIsInstance(pagesize, int)
|
|
self.assertGreaterEqual(pagesize, 0)
|
|
|
|
def test_contants(self):
|
|
self.assertIsInstance(resource.RLIM_INFINITY, int)
|
|
if sys.platform.startswith(('freebsd', 'solaris', 'sunos', 'aix')):
|
|
self.assertHasAttr(resource, 'RLIM_SAVED_CUR')
|
|
self.assertHasAttr(resource, 'RLIM_SAVED_MAX')
|
|
if hasattr(resource, 'RLIM_SAVED_CUR'):
|
|
self.assertIsInstance(resource.RLIM_SAVED_CUR, int)
|
|
self.assertIsInstance(resource.RLIM_SAVED_MAX, int)
|
|
|
|
@unittest.skipUnless(sys.platform in ('linux', 'android'), 'Linux only')
|
|
def test_linux_constants(self):
|
|
for attr in ['MSGQUEUE', 'NICE', 'RTPRIO', 'RTTIME', 'SIGPENDING']:
|
|
with contextlib.suppress(AttributeError):
|
|
self.assertIsInstance(getattr(resource, 'RLIMIT_' + attr), int)
|
|
|
|
def test_freebsd_contants(self):
|
|
for attr in ['SWAP', 'SBSIZE', 'NPTS', 'UMTXP', 'VMEM', 'PIPEBUF']:
|
|
with contextlib.suppress(AttributeError):
|
|
self.assertIsInstance(getattr(resource, 'RLIMIT_' + attr), int)
|
|
|
|
@unittest.skipUnless(hasattr(resource, 'prlimit'), 'no prlimit')
|
|
@support.requires_linux_version(2, 6, 36)
|
|
def test_prlimit(self):
|
|
self.assertRaises(TypeError, resource.prlimit)
|
|
self.assertRaises(ProcessLookupError, resource.prlimit,
|
|
-1, resource.RLIMIT_AS)
|
|
limit = resource.getrlimit(resource.RLIMIT_AS)
|
|
self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS), limit)
|
|
self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS, limit),
|
|
limit)
|
|
|
|
# Issue 20191: Reference counting bug
|
|
@unittest.skipUnless(hasattr(resource, 'prlimit'), 'no prlimit')
|
|
@support.requires_linux_version(2, 6, 36)
|
|
def test_prlimit_refcount(self):
|
|
class BadSeq:
|
|
def __len__(self):
|
|
return 2
|
|
def __getitem__(self, key):
|
|
lim = limits[key]
|
|
return lim - 1 if lim > 0 else lim + sys.maxsize*2 # new reference
|
|
|
|
limits = resource.getrlimit(resource.RLIMIT_AS)
|
|
self.assertEqual(resource.prlimit(0, resource.RLIMIT_AS, BadSeq()),
|
|
limits)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|