The remaining fields are only defined if the feature test macro
:const:`COUNT_ALLOCS` is defined, and are for internal use only. They are
documented here for completeness. None of these fields are inherited by
-subtypes.
+subtypes. See the :envvar:`PYTHONSHOWALLOCCOUNT` environment variable.
.. c:member:: Py_ssize_t PyTypeObject.tp_allocs
If set, Python will print memory allocation statistics every time a new
object arena is created, and on shutdown.
+.. envvar:: PYTHONSHOWALLOCCOUNT
+
+ If set and Python was compiled with ``COUNT_ALLOCS`` defined, Python will
+ dump allocations counts into stderr on shutdown.
+
+ .. versionadded:: 2.7.15
+
.. envvar:: PYTHONSHOWREFCOUNT
If set, Python will print the total reference count when the program
except TypeError:
return bytes(b)
+requires_type_collecting = unittest.skipIf(hasattr(sys, 'getcounts'),
+ 'types are immortal if COUNT_ALLOCS is defined')
+
def args_from_interpreter_flags():
"""Return a list of command-line arguments reproducing the current
settings in sys.flags."""
C()
self.assertEqual(B.counter, 1)
+ @test_support.requires_type_collecting
def test_cache_leak(self):
# See issue #2521.
class A(object):
import unittest
-from test.test_support import verbose, run_unittest, start_threads
+from test.support import (verbose, run_unittest, start_threads,
+ requires_type_collecting)
import sys
import time
import gc
del a
self.assertNotEqual(gc.collect(), 0)
+ @requires_type_collecting
def test_newinstance(self):
class A(object):
pass
self.assertIn(line2, reflog)
@unittest.skipUnless(Py_DEBUG, 'need a debug build')
+ @support.requires_type_collecting
def test_huntrleaks(self):
# test --huntrleaks
code = textwrap.dedent("""
# tupleiterator
check(iter(()), size('lP'))
# type
- s = vsize('P2P15Pl4PP9PP11PI' # PyTypeObject
+ fmt = 'P2P15Pl4PP9PP11PI'
+ if hasattr(sys, 'getcounts'):
+ fmt += '3P2P'
+ s = vsize(fmt + # PyTypeObject
'39P' # PyNumberMethods
'3P' # PyMappingMethods
'10P' # PySequenceMethods
del c1, c2, C, D
gc.collect()
+ @test_support.requires_type_collecting
def test_callback_in_cycle_resurrection(self):
import gc
--- /dev/null
+Add a new PYTHONSHOWALLOCCOUNT environment variable. When Python is compiled
+with COUNT_ALLOCS, PYTHONSHOWALLOCCOUNT now has to be set to dump allocation
+counts into stderr on shutdown. Moreover, allocations statistics are now dumped
+into stderr rather than stdout.
/* Debugging stuff */
#ifdef COUNT_ALLOCS
- dump_counts(stdout);
+ if (Py_GETENV("PYTHONSHOWALLOCCOUNT")) {
+ dump_counts(stderr);
+ }
#endif
_PyDebug_PrintTotalRefs();