495 lines
15 KiB
Python
495 lines
15 KiB
Python
import collections
|
|
import weakref
|
|
import gc
|
|
import operator
|
|
from itertools import takewhile
|
|
|
|
import unittest
|
|
from numba import njit, jit
|
|
from numba.core.compiler import CompilerBase, DefaultPassBuilder
|
|
from numba.core.untyped_passes import PreserveIR
|
|
from numba.core.typed_passes import IRLegalization
|
|
from numba.core import types, ir
|
|
from numba.tests.support import TestCase, override_config, SerialMixin
|
|
|
|
|
|
class _Dummy(object):
|
|
|
|
def __init__(self, recorder, name):
|
|
self.recorder = recorder
|
|
self.name = name
|
|
recorder._add_dummy(self)
|
|
|
|
def __add__(self, other):
|
|
assert isinstance(other, _Dummy)
|
|
return _Dummy(self.recorder, "%s + %s" % (self.name, other.name))
|
|
|
|
def __iter__(self):
|
|
return _DummyIterator(self.recorder, "iter(%s)" % self.name)
|
|
|
|
|
|
class _DummyIterator(_Dummy):
|
|
|
|
count = 0
|
|
|
|
def __next__(self):
|
|
if self.count >= 3:
|
|
raise StopIteration
|
|
self.count += 1
|
|
return _Dummy(self.recorder, "%s#%s" % (self.name, self.count))
|
|
|
|
next = __next__
|
|
|
|
|
|
class RefRecorder(object):
|
|
"""
|
|
An object which records events when instances created through it
|
|
are deleted. Custom events can also be recorded to aid in
|
|
diagnosis.
|
|
"""
|
|
|
|
def __init__(self):
|
|
self._counts = collections.defaultdict(int)
|
|
self._events = []
|
|
self._wrs = {}
|
|
|
|
def make_dummy(self, name):
|
|
"""
|
|
Make an object whose deletion will be recorded as *name*.
|
|
"""
|
|
return _Dummy(self, name)
|
|
|
|
def _add_dummy(self, dummy):
|
|
wr = weakref.ref(dummy, self._on_disposal)
|
|
self._wrs[wr] = dummy.name
|
|
|
|
__call__ = make_dummy
|
|
|
|
def mark(self, event):
|
|
"""
|
|
Manually append *event* to the recorded events.
|
|
*event* can be formatted using format().
|
|
"""
|
|
count = self._counts[event] + 1
|
|
self._counts[event] = count
|
|
self._events.append(event.format(count=count))
|
|
|
|
def _on_disposal(self, wr):
|
|
name = self._wrs.pop(wr)
|
|
self._events.append(name)
|
|
|
|
@property
|
|
def alive(self):
|
|
"""
|
|
A list of objects which haven't been deleted yet.
|
|
"""
|
|
return [wr() for wr in self._wrs]
|
|
|
|
@property
|
|
def recorded(self):
|
|
"""
|
|
A list of recorded events.
|
|
"""
|
|
return self._events
|
|
|
|
|
|
def simple_usecase1(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
c = rec('c')
|
|
a = b + c
|
|
rec.mark('--1--')
|
|
d = a + a # b + c + b + c
|
|
rec.mark('--2--')
|
|
return d
|
|
|
|
def simple_usecase2(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
rec.mark('--1--')
|
|
x = a
|
|
y = x
|
|
a = None
|
|
return y
|
|
|
|
def looping_usecase1(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
c = rec('c')
|
|
x = b
|
|
for y in a:
|
|
x = x + y
|
|
rec.mark('--loop bottom--')
|
|
rec.mark('--loop exit--')
|
|
x = x + c
|
|
return x
|
|
|
|
def looping_usecase2(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
cum = rec('cum')
|
|
for x in a:
|
|
rec.mark('--outer loop top--')
|
|
cum = cum + x
|
|
z = x + x
|
|
rec.mark('--inner loop entry #{count}--')
|
|
for y in b:
|
|
rec.mark('--inner loop top #{count}--')
|
|
cum = cum + y
|
|
rec.mark('--inner loop bottom #{count}--')
|
|
rec.mark('--inner loop exit #{count}--')
|
|
if cum:
|
|
cum = y + z
|
|
else:
|
|
# Never gets here, but let the Numba compiler see a `break` opcode
|
|
break
|
|
rec.mark('--outer loop bottom #{count}--')
|
|
else:
|
|
rec.mark('--outer loop else--')
|
|
rec.mark('--outer loop exit--')
|
|
return cum
|
|
|
|
def generator_usecase1(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
yield a
|
|
yield b
|
|
|
|
def generator_usecase2(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
for x in a:
|
|
yield x
|
|
yield b
|
|
|
|
|
|
class MyError(RuntimeError):
|
|
pass
|
|
|
|
def do_raise(x):
|
|
raise MyError(x)
|
|
|
|
def raising_usecase1(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
d = rec('d')
|
|
if a:
|
|
do_raise("foo")
|
|
c = rec('c')
|
|
c + a
|
|
c + b
|
|
|
|
def raising_usecase2(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
if a:
|
|
c = rec('c')
|
|
do_raise(b)
|
|
a + c
|
|
|
|
def raising_usecase3(rec):
|
|
a = rec('a')
|
|
b = rec('b')
|
|
if a:
|
|
raise MyError(b)
|
|
|
|
|
|
def del_before_definition(rec):
|
|
"""
|
|
This test reveal a bug that there is a del on uninitialized variable
|
|
"""
|
|
n = 5
|
|
for i in range(n):
|
|
rec.mark(str(i))
|
|
n = 0
|
|
for j in range(n):
|
|
return 0
|
|
else:
|
|
if i < 2:
|
|
continue
|
|
elif i == 2:
|
|
for j in range(i):
|
|
return i
|
|
rec.mark('FAILED')
|
|
rec.mark('FAILED')
|
|
rec.mark('FAILED')
|
|
rec.mark('OK')
|
|
return -1
|
|
|
|
|
|
def inf_loop_multiple_back_edge(rec):
|
|
"""
|
|
test to reveal bug of invalid liveness when infinite loop has multiple
|
|
backedge.
|
|
"""
|
|
while True:
|
|
rec.mark("yield")
|
|
yield
|
|
p = rec('p')
|
|
if p:
|
|
rec.mark('bra')
|
|
pass
|
|
|
|
|
|
class TestObjLifetime(TestCase):
|
|
"""
|
|
Test lifetime of Python objects inside jit-compiled functions.
|
|
"""
|
|
|
|
def compile(self, pyfunc):
|
|
# Note: looplift must be disabled. The test require the function
|
|
# control-flow to be unchanged.
|
|
cfunc = jit((types.pyobject,), forceobj=True, looplift=False)(pyfunc)
|
|
return cfunc
|
|
|
|
def compile_and_record(self, pyfunc, raises=None):
|
|
rec = RefRecorder()
|
|
cfunc = self.compile(pyfunc)
|
|
if raises is not None:
|
|
with self.assertRaises(raises):
|
|
cfunc(rec)
|
|
else:
|
|
cfunc(rec)
|
|
return rec
|
|
|
|
def assertRecordOrder(self, rec, expected):
|
|
"""
|
|
Check that the *expected* markers occur in that order in *rec*'s
|
|
recorded events.
|
|
"""
|
|
actual = []
|
|
recorded = rec.recorded
|
|
remaining = list(expected)
|
|
# Find out in which order, if any, the expected events were recorded
|
|
for d in recorded:
|
|
if d in remaining:
|
|
actual.append(d)
|
|
# User may or may not expect duplicates, handle them properly
|
|
remaining.remove(d)
|
|
self.assertEqual(actual, expected,
|
|
"the full list of recorded events is: %r" % (recorded,))
|
|
|
|
def test_simple1(self):
|
|
rec = self.compile_and_record(simple_usecase1)
|
|
self.assertFalse(rec.alive)
|
|
self.assertRecordOrder(rec, ['a', 'b', '--1--'])
|
|
self.assertRecordOrder(rec, ['a', 'c', '--1--'])
|
|
self.assertRecordOrder(rec, ['--1--', 'b + c', '--2--'])
|
|
|
|
def test_simple2(self):
|
|
rec = self.compile_and_record(simple_usecase2)
|
|
self.assertFalse(rec.alive)
|
|
self.assertRecordOrder(rec, ['b', '--1--', 'a'])
|
|
|
|
def test_looping1(self):
|
|
rec = self.compile_and_record(looping_usecase1)
|
|
self.assertFalse(rec.alive)
|
|
# a and b are unneeded after the loop, check they were disposed of
|
|
self.assertRecordOrder(rec, ['a', 'b', '--loop exit--', 'c'])
|
|
# check disposal order of iterator items and iterator
|
|
self.assertRecordOrder(rec, ['iter(a)#1', '--loop bottom--',
|
|
'iter(a)#2', '--loop bottom--',
|
|
'iter(a)#3', '--loop bottom--',
|
|
'iter(a)', '--loop exit--',
|
|
])
|
|
|
|
def test_looping2(self):
|
|
rec = self.compile_and_record(looping_usecase2)
|
|
self.assertFalse(rec.alive)
|
|
# `a` is disposed of after its iterator is taken
|
|
self.assertRecordOrder(rec, ['a', '--outer loop top--'])
|
|
# Check disposal of iterators
|
|
self.assertRecordOrder(rec, ['iter(a)', '--outer loop else--',
|
|
'--outer loop exit--'])
|
|
self.assertRecordOrder(rec, ['iter(b)', '--inner loop exit #1--',
|
|
'iter(b)', '--inner loop exit #2--',
|
|
'iter(b)', '--inner loop exit #3--',
|
|
])
|
|
# Disposal of in-loop variable `x`
|
|
self.assertRecordOrder(rec, ['iter(a)#1', '--inner loop entry #1--',
|
|
'iter(a)#2', '--inner loop entry #2--',
|
|
'iter(a)#3', '--inner loop entry #3--',
|
|
])
|
|
# Disposal of in-loop variable `z`
|
|
self.assertRecordOrder(rec, ['iter(a)#1 + iter(a)#1',
|
|
'--outer loop bottom #1--',
|
|
])
|
|
|
|
def exercise_generator(self, genfunc):
|
|
cfunc = self.compile(genfunc)
|
|
# Exhaust the generator
|
|
rec = RefRecorder()
|
|
with self.assertRefCount(rec):
|
|
gen = cfunc(rec)
|
|
next(gen)
|
|
self.assertTrue(rec.alive)
|
|
list(gen)
|
|
self.assertFalse(rec.alive)
|
|
# Instantiate the generator but never iterate
|
|
rec = RefRecorder()
|
|
with self.assertRefCount(rec):
|
|
gen = cfunc(rec)
|
|
del gen
|
|
gc.collect()
|
|
self.assertFalse(rec.alive)
|
|
# Stop iterating before exhaustion
|
|
rec = RefRecorder()
|
|
with self.assertRefCount(rec):
|
|
gen = cfunc(rec)
|
|
next(gen)
|
|
self.assertTrue(rec.alive)
|
|
del gen
|
|
gc.collect()
|
|
self.assertFalse(rec.alive)
|
|
|
|
def test_generator1(self):
|
|
self.exercise_generator(generator_usecase1)
|
|
|
|
def test_generator2(self):
|
|
self.exercise_generator(generator_usecase2)
|
|
|
|
def test_del_before_definition(self):
|
|
rec = self.compile_and_record(del_before_definition)
|
|
self.assertEqual(rec.recorded, ['0', '1', '2'])
|
|
|
|
def test_raising1(self):
|
|
with self.assertRefCount(do_raise):
|
|
rec = self.compile_and_record(raising_usecase1, raises=MyError)
|
|
self.assertFalse(rec.alive)
|
|
|
|
def test_raising2(self):
|
|
with self.assertRefCount(do_raise):
|
|
rec = self.compile_and_record(raising_usecase2, raises=MyError)
|
|
self.assertFalse(rec.alive)
|
|
|
|
def test_raising3(self):
|
|
with self.assertRefCount(MyError):
|
|
rec = self.compile_and_record(raising_usecase3, raises=MyError)
|
|
self.assertFalse(rec.alive)
|
|
|
|
def test_inf_loop_multiple_back_edge(self):
|
|
cfunc = self.compile(inf_loop_multiple_back_edge)
|
|
rec = RefRecorder()
|
|
iterator = iter(cfunc(rec))
|
|
next(iterator)
|
|
self.assertEqual(rec.alive, [])
|
|
next(iterator)
|
|
self.assertEqual(rec.alive, [])
|
|
next(iterator)
|
|
self.assertEqual(rec.alive, [])
|
|
self.assertEqual(rec.recorded,
|
|
['yield', 'p', 'bra', 'yield', 'p', 'bra', 'yield'])
|
|
|
|
|
|
class TestExtendingVariableLifetimes(SerialMixin, TestCase):
|
|
# Test for `numba.config.EXTEND_VARIABLE_LIFETIMES` which moves the ir.Del
|
|
# nodes to just before a block's terminator, i.e. their lifetime is extended
|
|
# beyond the point of last use.
|
|
|
|
def test_lifetime_basic(self):
|
|
|
|
def get_ir(extend_lifetimes):
|
|
class IRPreservingCompiler(CompilerBase):
|
|
|
|
def define_pipelines(self):
|
|
pm = DefaultPassBuilder.define_nopython_pipeline(self.state)
|
|
pm.add_pass_after(PreserveIR, IRLegalization)
|
|
pm.finalize()
|
|
return [pm]
|
|
|
|
@njit(pipeline_class=IRPreservingCompiler)
|
|
def foo():
|
|
a = 10
|
|
b = 20
|
|
c = a + b
|
|
# a and b are now unused, standard behaviour is ir.Del for them here
|
|
d = c / c
|
|
return d
|
|
|
|
with override_config('EXTEND_VARIABLE_LIFETIMES', extend_lifetimes):
|
|
foo()
|
|
cres = foo.overloads[foo.signatures[0]]
|
|
func_ir = cres.metadata['preserved_ir']
|
|
|
|
return func_ir
|
|
|
|
|
|
def check(func_ir, expect):
|
|
# assert single block
|
|
self.assertEqual(len(func_ir.blocks), 1)
|
|
blk = next(iter(func_ir.blocks.values()))
|
|
|
|
# check sequencing
|
|
for expect_class, got_stmt in zip(expect, blk.body):
|
|
self.assertIsInstance(got_stmt, expect_class)
|
|
|
|
del_after_use_ir = get_ir(False)
|
|
# should be 3 assigns (a, b, c), 2 del (a, b), assign (d), del (c)
|
|
# assign for cast d to return, del (d), return
|
|
expect = [*((ir.Assign,) * 3), ir.Del, ir.Del, ir.Assign, ir.Del,
|
|
ir.Assign, ir.Del, ir.Return]
|
|
check(del_after_use_ir, expect)
|
|
|
|
del_at_block_end_ir = get_ir(True)
|
|
# should be 4 assigns (a, b, c, d), assign for cast d to return,
|
|
# 4 dels (a, b, c, d) then the return.
|
|
expect = [*((ir.Assign,) * 4), ir.Assign, *((ir.Del,) * 4), ir.Return]
|
|
check(del_at_block_end_ir, expect)
|
|
|
|
def test_dbg_extend_lifetimes(self):
|
|
|
|
def get_ir(**options):
|
|
class IRPreservingCompiler(CompilerBase):
|
|
|
|
def define_pipelines(self):
|
|
pm = DefaultPassBuilder.define_nopython_pipeline(self.state)
|
|
pm.add_pass_after(PreserveIR, IRLegalization)
|
|
pm.finalize()
|
|
return [pm]
|
|
|
|
@njit(pipeline_class=IRPreservingCompiler, **options)
|
|
def foo():
|
|
a = 10
|
|
b = 20
|
|
c = a + b
|
|
# a and b are now unused, standard behaviour is ir.Del for them here
|
|
d = c / c
|
|
return d
|
|
|
|
foo()
|
|
cres = foo.overloads[foo.signatures[0]]
|
|
func_ir = cres.metadata['preserved_ir']
|
|
|
|
return func_ir
|
|
|
|
# _dbg_extend_lifetimes is on when debug=True
|
|
ir_debug = get_ir(debug=True)
|
|
# explicitly turn on _dbg_extend_lifetimes
|
|
ir_debug_ext = get_ir(debug=True, _dbg_extend_lifetimes=True)
|
|
# explicitly turn off _dbg_extend_lifetimes
|
|
ir_debug_no_ext = get_ir(debug=True, _dbg_extend_lifetimes=False)
|
|
|
|
def is_del_grouped_at_the_end(fir):
|
|
[blk] = fir.blocks.values()
|
|
# Mark all statements that are ir.Del
|
|
inst_is_del = [isinstance(stmt, ir.Del) for stmt in blk.body]
|
|
# Get the leading segment that are not dels
|
|
not_dels = list(takewhile(operator.not_, inst_is_del))
|
|
# Compute the starting position of the dels
|
|
begin = len(not_dels)
|
|
# Get the remaining segment that are all dels
|
|
all_dels = list(takewhile(operator.truth, inst_is_del[begin:]))
|
|
# Compute the ending position of the dels
|
|
end = begin + len(all_dels)
|
|
# If the dels are all grouped at the end (before the terminator),
|
|
# the end position will be the last position of the list
|
|
return end == len(inst_is_del) - 1
|
|
|
|
self.assertTrue(is_del_grouped_at_the_end(ir_debug))
|
|
self.assertTrue(is_del_grouped_at_the_end(ir_debug_ext))
|
|
self.assertFalse(is_del_grouped_at_the_end(ir_debug_no_ext))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|