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Copy pathtest_dis.py
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1954 lines (1664 loc) · 79 KB
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# Minimal tests for dis module
import contextlib
import dis
import io
import re
import sys
import types
import unittest
from test.support import captured_stdout, requires_debug_ranges, cpython_only
from test.support.bytecode_helper import BytecodeTestCase
import opcode
def get_tb():
def _error():
try:
1 / 0
except Exception as e:
tb = e.__traceback__
return tb
tb = _error()
while tb.tb_next:
tb = tb.tb_next
return tb
TRACEBACK_CODE = get_tb().tb_frame.f_code
class _C:
def __init__(self, x):
self.x = x == 1
@staticmethod
def sm(x):
x = x == 1
@classmethod
def cm(cls, x):
cls.x = x == 1
dis_c_instance_method = """\
%3d RESUME 0
%3d LOAD_FAST 1 (x)
LOAD_CONST 1 (1)
COMPARE_OP 2 (==)
LOAD_FAST 0 (self)
STORE_ATTR 0 (x)
LOAD_CONST 0 (None)
RETURN_VALUE
""" % (_C.__init__.__code__.co_firstlineno, _C.__init__.__code__.co_firstlineno + 1,)
dis_c_instance_method_bytes = """\
RESUME 0
LOAD_FAST 1
LOAD_CONST 1
COMPARE_OP 2 (==)
LOAD_FAST 0
STORE_ATTR 0
LOAD_CONST 0
RETURN_VALUE
"""
dis_c_class_method = """\
%3d RESUME 0
%3d LOAD_FAST 1 (x)
LOAD_CONST 1 (1)
COMPARE_OP 2 (==)
LOAD_FAST 0 (cls)
STORE_ATTR 0 (x)
LOAD_CONST 0 (None)
RETURN_VALUE
""" % (_C.cm.__code__.co_firstlineno, _C.cm.__code__.co_firstlineno + 2,)
dis_c_static_method = """\
%3d RESUME 0
%3d LOAD_FAST 0 (x)
LOAD_CONST 1 (1)
COMPARE_OP 2 (==)
STORE_FAST 0 (x)
LOAD_CONST 0 (None)
RETURN_VALUE
""" % (_C.sm.__code__.co_firstlineno, _C.sm.__code__.co_firstlineno + 2,)
# Class disassembling info has an extra newline at end.
dis_c = """\
Disassembly of %s:
%s
Disassembly of %s:
%s
Disassembly of %s:
%s
""" % (_C.__init__.__name__, dis_c_instance_method,
_C.cm.__name__, dis_c_class_method,
_C.sm.__name__, dis_c_static_method)
def _f(a):
print(a)
return 1
dis_f = """\
%3d RESUME 0
%3d LOAD_GLOBAL 1 (NULL + print)
LOAD_FAST 0 (a)
CALL 1
POP_TOP
%3d LOAD_CONST 1 (1)
RETURN_VALUE
""" % (_f.__code__.co_firstlineno,
_f.__code__.co_firstlineno + 1,
_f.__code__.co_firstlineno + 2)
dis_f_co_code = """\
RESUME 0
LOAD_GLOBAL 1
LOAD_FAST 0
CALL 1
POP_TOP
LOAD_CONST 1
RETURN_VALUE
"""
def bug708901():
for res in range(1,
10):
pass
dis_bug708901 = """\
%3d RESUME 0
%3d LOAD_GLOBAL 1 (NULL + range)
LOAD_CONST 1 (1)
%3d LOAD_CONST 2 (10)
%3d CALL 2
GET_ITER
>> FOR_ITER 2 (to 36)
STORE_FAST 0 (res)
%3d JUMP_BACKWARD 3 (to 30)
%3d >> LOAD_CONST 0 (None)
RETURN_VALUE
""" % (bug708901.__code__.co_firstlineno,
bug708901.__code__.co_firstlineno + 1,
bug708901.__code__.co_firstlineno + 2,
bug708901.__code__.co_firstlineno + 1,
bug708901.__code__.co_firstlineno + 3,
bug708901.__code__.co_firstlineno + 1)
def bug1333982(x=[]):
assert 0, ([s for s in x] +
1)
pass
dis_bug1333982 = """\
%3d RESUME 0
%3d LOAD_ASSERTION_ERROR
LOAD_CONST 2 (<code object <listcomp> at 0x..., file "%s", line %d>)
MAKE_FUNCTION 0
LOAD_FAST 0 (x)
GET_ITER
CALL 0
%3d LOAD_CONST 3 (1)
%3d BINARY_OP 0 (+)
CALL 0
RAISE_VARARGS 1
""" % (bug1333982.__code__.co_firstlineno,
bug1333982.__code__.co_firstlineno + 1,
__file__,
bug1333982.__code__.co_firstlineno + 1,
bug1333982.__code__.co_firstlineno + 2,
bug1333982.__code__.co_firstlineno + 1)
def bug42562():
pass
# Set line number for 'pass' to None
bug42562.__code__ = bug42562.__code__.replace(co_linetable=b'\xf8')
dis_bug42562 = """\
RESUME 0
LOAD_CONST 0 (None)
RETURN_VALUE
"""
# Extended arg followed by NOP
code_bug_45757 = bytes([
0x90, 0x01, # EXTENDED_ARG 0x01
0x09, 0xFF, # NOP 0xFF
0x90, 0x01, # EXTENDED_ARG 0x01
0x64, 0x29, # LOAD_CONST 0x29
0x53, 0x00, # RETURN_VALUE 0x00
])
dis_bug_45757 = """\
EXTENDED_ARG 1
NOP
EXTENDED_ARG 1
LOAD_CONST 297
RETURN_VALUE
"""
# [255, 255, 255, 252] is -4 in a 4 byte signed integer
bug46724 = bytes([
opcode.EXTENDED_ARG, 255,
opcode.EXTENDED_ARG, 255,
opcode.EXTENDED_ARG, 255,
opcode.opmap['JUMP_FORWARD'], 252,
])
dis_bug46724 = """\
>> EXTENDED_ARG 255
EXTENDED_ARG 65535
EXTENDED_ARG 16777215
JUMP_FORWARD -4 (to 0)
"""
_BIG_LINENO_FORMAT = """\
1 RESUME 0
%3d LOAD_GLOBAL 0 (spam)
POP_TOP
LOAD_CONST 0 (None)
RETURN_VALUE
"""
_BIG_LINENO_FORMAT2 = """\
1 RESUME 0
%4d LOAD_GLOBAL 0 (spam)
POP_TOP
LOAD_CONST 0 (None)
RETURN_VALUE
"""
dis_module_expected_results = """\
Disassembly of f:
4 RESUME 0
LOAD_CONST 0 (None)
RETURN_VALUE
Disassembly of g:
5 RESUME 0
LOAD_CONST 0 (None)
RETURN_VALUE
"""
expr_str = "x + 1"
dis_expr_str = """\
RESUME 0
1 LOAD_NAME 0 (x)
LOAD_CONST 0 (1)
BINARY_OP 0 (+)
RETURN_VALUE
"""
simple_stmt_str = "x = x + 1"
dis_simple_stmt_str = """\
RESUME 0
1 LOAD_NAME 0 (x)
LOAD_CONST 0 (1)
BINARY_OP 0 (+)
STORE_NAME 0 (x)
LOAD_CONST 1 (None)
RETURN_VALUE
"""
annot_stmt_str = """\
x: int = 1
y: fun(1)
lst[fun(0)]: int = 1
"""
# leading newline is for a reason (tests lineno)
dis_annot_stmt_str = """\
RESUME 0
2 SETUP_ANNOTATIONS
LOAD_CONST 0 (1)
STORE_NAME 0 (x)
LOAD_NAME 1 (int)
LOAD_NAME 2 (__annotations__)
LOAD_CONST 1 ('x')
STORE_SUBSCR
3 PUSH_NULL
LOAD_NAME 3 (fun)
LOAD_CONST 0 (1)
CALL 1
LOAD_NAME 2 (__annotations__)
LOAD_CONST 2 ('y')
STORE_SUBSCR
4 LOAD_CONST 0 (1)
LOAD_NAME 4 (lst)
PUSH_NULL
LOAD_NAME 3 (fun)
LOAD_CONST 3 (0)
CALL 1
STORE_SUBSCR
LOAD_NAME 1 (int)
POP_TOP
LOAD_CONST 4 (None)
RETURN_VALUE
"""
compound_stmt_str = """\
x = 0
while 1:
x += 1"""
# Trailing newline has been deliberately omitted
dis_compound_stmt_str = """\
RESUME 0
1 LOAD_CONST 0 (0)
STORE_NAME 0 (x)
2 NOP
3 >> LOAD_NAME 0 (x)
LOAD_CONST 1 (1)
BINARY_OP 13 (+=)
STORE_NAME 0 (x)
2 JUMP_BACKWARD 6 (to 8)
"""
dis_traceback = """\
%3d RESUME 0
%3d NOP
%3d LOAD_CONST 1 (1)
LOAD_CONST 2 (0)
--> BINARY_OP 11 (/)
POP_TOP
%3d LOAD_FAST_CHECK 1 (tb)
RETURN_VALUE
>> PUSH_EXC_INFO
%3d LOAD_GLOBAL 0 (Exception)
CHECK_EXC_MATCH
POP_JUMP_FORWARD_IF_FALSE 23 (to 82)
STORE_FAST 0 (e)
%3d LOAD_FAST 0 (e)
LOAD_ATTR 2 (__traceback__)
STORE_FAST 1 (tb)
POP_EXCEPT
LOAD_CONST 0 (None)
STORE_FAST 0 (e)
DELETE_FAST 0 (e)
%3d LOAD_FAST 1 (tb)
RETURN_VALUE
>> LOAD_CONST 0 (None)
STORE_FAST 0 (e)
DELETE_FAST 0 (e)
RERAISE 1
%3d >> RERAISE 0
>> COPY 3
POP_EXCEPT
RERAISE 1
ExceptionTable:
4 rows
""" % (TRACEBACK_CODE.co_firstlineno,
TRACEBACK_CODE.co_firstlineno + 1,
TRACEBACK_CODE.co_firstlineno + 2,
TRACEBACK_CODE.co_firstlineno + 5,
TRACEBACK_CODE.co_firstlineno + 3,
TRACEBACK_CODE.co_firstlineno + 4,
TRACEBACK_CODE.co_firstlineno + 5,
TRACEBACK_CODE.co_firstlineno + 3)
def _fstring(a, b, c, d):
return f'{a} {b:4} {c!r} {d!r:4}'
dis_fstring = """\
%3d RESUME 0
%3d LOAD_FAST 0 (a)
FORMAT_VALUE 0
LOAD_CONST 1 (' ')
LOAD_FAST 1 (b)
LOAD_CONST 2 ('4')
FORMAT_VALUE 4 (with format)
LOAD_CONST 1 (' ')
LOAD_FAST 2 (c)
FORMAT_VALUE 2 (repr)
LOAD_CONST 1 (' ')
LOAD_FAST 3 (d)
LOAD_CONST 2 ('4')
FORMAT_VALUE 6 (repr, with format)
BUILD_STRING 7
RETURN_VALUE
""" % (_fstring.__code__.co_firstlineno, _fstring.__code__.co_firstlineno + 1)
def _with(c):
with c:
x = 1
y = 2
dis_with = """\
%3d RESUME 0
%3d LOAD_FAST 0 (c)
BEFORE_WITH
POP_TOP
%3d LOAD_CONST 1 (1)
STORE_FAST 1 (x)
%3d LOAD_CONST 0 (None)
LOAD_CONST 0 (None)
LOAD_CONST 0 (None)
CALL 2
POP_TOP
%3d LOAD_CONST 2 (2)
STORE_FAST 2 (y)
LOAD_CONST 0 (None)
RETURN_VALUE
%3d >> PUSH_EXC_INFO
WITH_EXCEPT_START
POP_JUMP_FORWARD_IF_TRUE 1 (to 46)
RERAISE 2
>> POP_TOP
POP_EXCEPT
POP_TOP
POP_TOP
%3d LOAD_CONST 2 (2)
STORE_FAST 2 (y)
LOAD_CONST 0 (None)
RETURN_VALUE
>> COPY 3
POP_EXCEPT
RERAISE 1
ExceptionTable:
2 rows
""" % (_with.__code__.co_firstlineno,
_with.__code__.co_firstlineno + 1,
_with.__code__.co_firstlineno + 2,
_with.__code__.co_firstlineno + 1,
_with.__code__.co_firstlineno + 3,
_with.__code__.co_firstlineno + 1,
_with.__code__.co_firstlineno + 3,
)
async def _asyncwith(c):
async with c:
x = 1
y = 2
dis_asyncwith = """\
%3d RETURN_GENERATOR
POP_TOP
RESUME 0
%3d LOAD_FAST 0 (c)
BEFORE_ASYNC_WITH
GET_AWAITABLE 1
LOAD_CONST 0 (None)
>> SEND 3 (to 22)
YIELD_VALUE 3
RESUME 3
JUMP_BACKWARD_NO_INTERRUPT 4 (to 14)
>> POP_TOP
%3d LOAD_CONST 1 (1)
STORE_FAST 1 (x)
%3d LOAD_CONST 0 (None)
LOAD_CONST 0 (None)
LOAD_CONST 0 (None)
CALL 2
GET_AWAITABLE 2
LOAD_CONST 0 (None)
>> SEND 3 (to 56)
YIELD_VALUE 2
RESUME 3
JUMP_BACKWARD_NO_INTERRUPT 4 (to 48)
>> POP_TOP
%3d LOAD_CONST 2 (2)
STORE_FAST 2 (y)
LOAD_CONST 0 (None)
RETURN_VALUE
%3d >> PUSH_EXC_INFO
WITH_EXCEPT_START
GET_AWAITABLE 2
LOAD_CONST 0 (None)
>> SEND 3 (to 82)
YIELD_VALUE 6
RESUME 3
JUMP_BACKWARD_NO_INTERRUPT 4 (to 74)
>> POP_JUMP_FORWARD_IF_TRUE 1 (to 86)
RERAISE 2
>> POP_TOP
POP_EXCEPT
POP_TOP
POP_TOP
%3d LOAD_CONST 2 (2)
STORE_FAST 2 (y)
LOAD_CONST 0 (None)
RETURN_VALUE
>> COPY 3
POP_EXCEPT
RERAISE 1
ExceptionTable:
2 rows
""" % (_asyncwith.__code__.co_firstlineno,
_asyncwith.__code__.co_firstlineno + 1,
_asyncwith.__code__.co_firstlineno + 2,
_asyncwith.__code__.co_firstlineno + 1,
_asyncwith.__code__.co_firstlineno + 3,
_asyncwith.__code__.co_firstlineno + 1,
_asyncwith.__code__.co_firstlineno + 3,
)
def _tryfinally(a, b):
try:
return a
finally:
b()
def _tryfinallyconst(b):
try:
return 1
finally:
b()
dis_tryfinally = """\
%3d RESUME 0
%3d NOP
%3d LOAD_FAST 0 (a)
%3d PUSH_NULL
LOAD_FAST 1 (b)
CALL 0
POP_TOP
RETURN_VALUE
>> PUSH_EXC_INFO
PUSH_NULL
LOAD_FAST 1 (b)
CALL 0
POP_TOP
RERAISE 0
>> COPY 3
POP_EXCEPT
RERAISE 1
ExceptionTable:
2 rows
""" % (_tryfinally.__code__.co_firstlineno,
_tryfinally.__code__.co_firstlineno + 1,
_tryfinally.__code__.co_firstlineno + 2,
_tryfinally.__code__.co_firstlineno + 4,
)
dis_tryfinallyconst = """\
%3d RESUME 0
%3d NOP
%3d NOP
%3d PUSH_NULL
LOAD_FAST 0 (b)
CALL 0
POP_TOP
LOAD_CONST 1 (1)
RETURN_VALUE
PUSH_EXC_INFO
PUSH_NULL
LOAD_FAST 0 (b)
CALL 0
POP_TOP
RERAISE 0
>> COPY 3
POP_EXCEPT
RERAISE 1
ExceptionTable:
1 row
""" % (_tryfinallyconst.__code__.co_firstlineno,
_tryfinallyconst.__code__.co_firstlineno + 1,
_tryfinallyconst.__code__.co_firstlineno + 2,
_tryfinallyconst.__code__.co_firstlineno + 4,
)
def _g(x):
yield x
async def _ag(x):
yield x
async def _co(x):
async for item in _ag(x):
pass
def _h(y):
def foo(x):
'''funcdoc'''
return [x + z for z in y]
return foo
dis_nested_0 = """\
MAKE_CELL 0 (y)
%3d RESUME 0
%3d LOAD_CLOSURE 0 (y)
BUILD_TUPLE 1
LOAD_CONST 1 (<code object foo at 0x..., file "%s", line %d>)
MAKE_FUNCTION 8 (closure)
STORE_FAST 1 (foo)
%3d LOAD_FAST 1 (foo)
RETURN_VALUE
""" % (_h.__code__.co_firstlineno,
_h.__code__.co_firstlineno + 1,
__file__,
_h.__code__.co_firstlineno + 1,
_h.__code__.co_firstlineno + 4,
)
dis_nested_1 = """%s
Disassembly of <code object foo at 0x..., file "%s", line %d>:
COPY_FREE_VARS 1
MAKE_CELL 0 (x)
%3d RESUME 0
%3d LOAD_CLOSURE 0 (x)
BUILD_TUPLE 1
LOAD_CONST 1 (<code object <listcomp> at 0x..., file "%s", line %d>)
MAKE_FUNCTION 8 (closure)
LOAD_DEREF 1 (y)
GET_ITER
CALL 0
RETURN_VALUE
""" % (dis_nested_0,
__file__,
_h.__code__.co_firstlineno + 1,
_h.__code__.co_firstlineno + 1,
_h.__code__.co_firstlineno + 3,
__file__,
_h.__code__.co_firstlineno + 3,
)
dis_nested_2 = """%s
Disassembly of <code object <listcomp> at 0x..., file "%s", line %d>:
COPY_FREE_VARS 1
%3d RESUME 0
BUILD_LIST 0
LOAD_FAST 0 (.0)
>> FOR_ITER 7 (to 24)
STORE_FAST 1 (z)
LOAD_DEREF 2 (x)
LOAD_FAST 1 (z)
BINARY_OP 0 (+)
LIST_APPEND 2
JUMP_BACKWARD 8 (to 8)
>> RETURN_VALUE
""" % (dis_nested_1,
__file__,
_h.__code__.co_firstlineno + 3,
_h.__code__.co_firstlineno + 3,
)
def load_test(x, y=0):
a, b = x, y
return a, b
dis_load_test_quickened_code = """\
%3d 0 RESUME_QUICK 0
%3d 2 LOAD_FAST__LOAD_FAST 0 (x)
4 LOAD_FAST 1 (y)
6 STORE_FAST__STORE_FAST 3 (b)
8 STORE_FAST__LOAD_FAST 2 (a)
%3d 10 LOAD_FAST__LOAD_FAST 2 (a)
12 LOAD_FAST 3 (b)
14 BUILD_TUPLE 2
16 RETURN_VALUE
""" % (load_test.__code__.co_firstlineno,
load_test.__code__.co_firstlineno + 1,
load_test.__code__.co_firstlineno + 2)
def loop_test():
for i in [1, 2, 3] * 3:
load_test(i)
dis_loop_test_quickened_code = """\
%3d RESUME_QUICK 0
%3d BUILD_LIST 0
LOAD_CONST 1 ((1, 2, 3))
LIST_EXTEND 1
LOAD_CONST 2 (3)
BINARY_OP_ADAPTIVE 5 (*)
GET_ITER
FOR_ITER 15 (to 48)
STORE_FAST 0 (i)
%3d LOAD_GLOBAL_MODULE 1 (NULL + load_test)
LOAD_FAST 0 (i)
CALL_PY_WITH_DEFAULTS 1
POP_TOP
JUMP_BACKWARD_QUICK 16 (to 16)
%3d >> LOAD_CONST 0 (None)
RETURN_VALUE
""" % (loop_test.__code__.co_firstlineno,
loop_test.__code__.co_firstlineno + 1,
loop_test.__code__.co_firstlineno + 2,
loop_test.__code__.co_firstlineno + 1,)
def extended_arg_quick():
*_, _ = ...
dis_extended_arg_quick_code = """\
%3d 0 RESUME 0
%3d 2 LOAD_CONST 1 (Ellipsis)
4 EXTENDED_ARG_QUICK 1
6 UNPACK_EX 256
8 STORE_FAST 0 (_)
10 STORE_FAST 0 (_)
12 LOAD_CONST 0 (None)
14 RETURN_VALUE
"""% (extended_arg_quick.__code__.co_firstlineno,
extended_arg_quick.__code__.co_firstlineno + 1,)
QUICKENING_WARMUP_DELAY = 8
class DisTestBase(unittest.TestCase):
"Common utilities for DisTests and TestDisTraceback"
def strip_addresses(self, text):
return re.sub(r'\b0x[0-9A-Fa-f]+\b', '0x...', text)
def find_offset_column(self, lines):
for line in lines:
if line and not line.startswith("Disassembly"):
break
else:
return 0, 0
offset = 5
while (line[offset] == " "):
offset += 1
if (line[offset] == ">"):
offset += 2
while (line[offset] == " "):
offset += 1
end = offset
while line[end] in "0123456789":
end += 1
return end-5, end
def assert_offsets_increasing(self, text, delta):
expected_offset = 0
lines = text.splitlines()
start, end = self.find_offset_column(lines)
for line in lines:
if not line:
continue
if line.startswith("Disassembly"):
expected_offset = 0
continue
if line.startswith("Exception"):
break
offset = int(line[start:end])
self.assertGreaterEqual(offset, expected_offset, line)
expected_offset = offset + delta
def assert_exception_table_increasing(self, lines):
prev_start, prev_end = -1, -1
count = 0
for line in lines:
m = re.match(r' (\d+) to (\d+) -> \d+ \[\d+\]', line)
start, end = [int(g) for g in m.groups()]
self.assertGreaterEqual(end, start)
self.assertGreater(start, prev_end)
prev_start, prev_end = start, end
count += 1
return count
def strip_offsets(self, text):
lines = text.splitlines(True)
start, end = self.find_offset_column(lines)
res = []
lines = iter(lines)
for line in lines:
if line.startswith("Exception"):
res.append(line)
break
if not line or line.startswith("Disassembly"):
res.append(line)
else:
res.append(line[:start] + line[end:])
num_rows = self.assert_exception_table_increasing(lines)
if num_rows:
res.append(f"{num_rows} row{'s' if num_rows > 1 else ''}\n")
return "".join(res)
def do_disassembly_compare(self, got, expected, with_offsets=False):
if not with_offsets:
self.assert_offsets_increasing(got, 2)
got = self.strip_offsets(got)
if got != expected:
got = self.strip_addresses(got)
self.assertEqual(got, expected)
class DisTests(DisTestBase):
maxDiff = None
def get_disassembly(self, func, lasti=-1, wrapper=True, **kwargs):
# We want to test the default printing behaviour, not the file arg
output = io.StringIO()
with contextlib.redirect_stdout(output):
if wrapper:
dis.dis(func, **kwargs)
else:
dis.disassemble(func, lasti, **kwargs)
return output.getvalue()
def get_disassemble_as_string(self, func, lasti=-1):
return self.get_disassembly(func, lasti, False)
def do_disassembly_test(self, func, expected, with_offsets=False):
self.maxDiff = None
got = self.get_disassembly(func, depth=0)
self.do_disassembly_compare(got, expected, with_offsets)
def test_opmap(self):
self.assertEqual(dis.opmap["NOP"], 9)
self.assertIn(dis.opmap["LOAD_CONST"], dis.hasconst)
self.assertIn(dis.opmap["STORE_NAME"], dis.hasname)
def test_opname(self):
self.assertEqual(dis.opname[dis.opmap["LOAD_FAST"]], "LOAD_FAST")
def test_boundaries(self):
self.assertEqual(dis.opmap["EXTENDED_ARG"], dis.EXTENDED_ARG)
self.assertEqual(dis.opmap["STORE_NAME"], dis.HAVE_ARGUMENT)
def test_widths(self):
long_opcodes = set(['POP_JUMP_FORWARD_IF_FALSE',
'POP_JUMP_FORWARD_IF_TRUE',
'POP_JUMP_FORWARD_IF_NOT_NONE',
'POP_JUMP_FORWARD_IF_NONE',
'POP_JUMP_BACKWARD_IF_FALSE',
'POP_JUMP_BACKWARD_IF_TRUE',
'POP_JUMP_BACKWARD_IF_NOT_NONE',
'POP_JUMP_BACKWARD_IF_NONE',
'JUMP_BACKWARD_NO_INTERRUPT',
])
for opcode, opname in enumerate(dis.opname):
if opname in long_opcodes:
continue
with self.subTest(opname=opname):
width = dis._OPNAME_WIDTH
if opcode < dis.HAVE_ARGUMENT:
width += 1 + dis._OPARG_WIDTH
self.assertLessEqual(len(opname), width)
def test_dis(self):
self.do_disassembly_test(_f, dis_f)
def test_bug_708901(self):
self.do_disassembly_test(bug708901, dis_bug708901)
def test_bug_1333982(self):
# This one is checking bytecodes generated for an `assert` statement,
# so fails if the tests are run with -O. Skip this test then.
if not __debug__:
self.skipTest('need asserts, run without -O')
self.do_disassembly_test(bug1333982, dis_bug1333982)
def test_bug_42562(self):
self.do_disassembly_test(bug42562, dis_bug42562)
def test_bug_45757(self):
# Extended arg followed by NOP
self.do_disassembly_test(code_bug_45757, dis_bug_45757)
def test_bug_46724(self):
# Test that negative operargs are handled properly
self.do_disassembly_test(bug46724, dis_bug46724)
def test_big_linenos(self):
def func(count):
namespace = {}
func = "def foo():\n " + "".join(["\n "] * count + ["spam\n"])
exec(func, namespace)
return namespace['foo']
# Test all small ranges
for i in range(1, 300):
expected = _BIG_LINENO_FORMAT % (i + 2)
self.do_disassembly_test(func(i), expected)
# Test some larger ranges too
for i in range(300, 1000, 10):
expected = _BIG_LINENO_FORMAT % (i + 2)
self.do_disassembly_test(func(i), expected)
for i in range(1000, 5000, 10):
expected = _BIG_LINENO_FORMAT2 % (i + 2)
self.do_disassembly_test(func(i), expected)
from test import dis_module
self.do_disassembly_test(dis_module, dis_module_expected_results)
def test_big_offsets(self):
self.maxDiff = None
def func(count):
namespace = {}
func = "def foo(x):\n " + ";".join(["x = x + 1"] * count) + "\n return x"
exec(func, namespace)
return namespace['foo']
def expected(count, w):
s = ['''\
1 %*d RESUME 0
''' % (w, 0)]
s += ['''\
%*d LOAD_FAST 0 (x)
%*d LOAD_CONST 1 (1)
%*d BINARY_OP 0 (+)
%*d STORE_FAST 0 (x)
''' % (w, 10*i + 2, w, 10*i + 4, w, 10*i + 6, w, 10*i + 10)
for i in range(count)]
s += ['''\
3 %*d LOAD_FAST 0 (x)
%*d RETURN_VALUE
''' % (w, 10*count + 2, w, 10*count + 4)]
s[1] = ' 2' + s[1][3:]
return ''.join(s)
for i in range(1, 5):
self.do_disassembly_test(func(i), expected(i, 4), True)
self.do_disassembly_test(func(999), expected(999, 4), True)
self.do_disassembly_test(func(1000), expected(1000, 5), True)
def test_disassemble_str(self):
self.do_disassembly_test(expr_str, dis_expr_str)
self.do_disassembly_test(simple_stmt_str, dis_simple_stmt_str)
self.do_disassembly_test(annot_stmt_str, dis_annot_stmt_str)
self.do_disassembly_test(compound_stmt_str, dis_compound_stmt_str)
def test_disassemble_bytes(self):
self.do_disassembly_test(_f.__code__.co_code, dis_f_co_code)
def test_disassemble_class(self):
self.do_disassembly_test(_C, dis_c)
def test_disassemble_instance_method(self):
self.do_disassembly_test(_C(1).__init__, dis_c_instance_method)