mirror of
https://github.com/python/cpython.git
synced 2025-11-04 11:49:12 +00:00
370 lines
9.6 KiB
Python
370 lines
9.6 KiB
Python
# Minimal tests for dis module
|
|
|
|
from test.support import run_unittest, captured_stdout
|
|
import unittest
|
|
import sys
|
|
import dis
|
|
import io
|
|
|
|
|
|
def _f(a):
|
|
print(a)
|
|
return 1
|
|
|
|
dis_f = """\
|
|
%-4d 0 LOAD_GLOBAL 0 (print)
|
|
3 LOAD_FAST 0 (a)
|
|
6 CALL_FUNCTION 1
|
|
9 POP_TOP
|
|
|
|
%-4d 10 LOAD_CONST 1 (1)
|
|
13 RETURN_VALUE
|
|
""" % (_f.__code__.co_firstlineno + 1,
|
|
_f.__code__.co_firstlineno + 2)
|
|
|
|
|
|
def bug708901():
|
|
for res in range(1,
|
|
10):
|
|
pass
|
|
|
|
dis_bug708901 = """\
|
|
%-4d 0 SETUP_LOOP 23 (to 26)
|
|
3 LOAD_GLOBAL 0 (range)
|
|
6 LOAD_CONST 1 (1)
|
|
|
|
%-4d 9 LOAD_CONST 2 (10)
|
|
12 CALL_FUNCTION 2
|
|
15 GET_ITER
|
|
>> 16 FOR_ITER 6 (to 25)
|
|
19 STORE_FAST 0 (res)
|
|
|
|
%-4d 22 JUMP_ABSOLUTE 16
|
|
>> 25 POP_BLOCK
|
|
>> 26 LOAD_CONST 0 (None)
|
|
29 RETURN_VALUE
|
|
""" % (bug708901.__code__.co_firstlineno + 1,
|
|
bug708901.__code__.co_firstlineno + 2,
|
|
bug708901.__code__.co_firstlineno + 3)
|
|
|
|
|
|
def bug1333982(x=[]):
|
|
assert 0, ([s for s in x] +
|
|
1)
|
|
pass
|
|
|
|
dis_bug1333982 = """\
|
|
%-4d 0 LOAD_CONST 1 (0)
|
|
3 JUMP_IF_TRUE 33 (to 39)
|
|
6 POP_TOP
|
|
7 LOAD_GLOBAL 0 (AssertionError)
|
|
10 BUILD_LIST 0
|
|
13 LOAD_FAST 0 (x)
|
|
16 GET_ITER
|
|
>> 17 FOR_ITER 12 (to 32)
|
|
20 STORE_FAST 1 (s)
|
|
23 LOAD_FAST 1 (s)
|
|
26 LIST_APPEND 2
|
|
29 JUMP_ABSOLUTE 17
|
|
|
|
%-4d >> 32 LOAD_CONST 2 (1)
|
|
35 BINARY_ADD
|
|
36 RAISE_VARARGS 2
|
|
>> 39 POP_TOP
|
|
|
|
%-4d 40 LOAD_CONST 0 (None)
|
|
43 RETURN_VALUE
|
|
""" % (bug1333982.__code__.co_firstlineno + 1,
|
|
bug1333982.__code__.co_firstlineno + 2,
|
|
bug1333982.__code__.co_firstlineno + 3)
|
|
|
|
_BIG_LINENO_FORMAT = """\
|
|
%3d 0 LOAD_GLOBAL 0 (spam)
|
|
3 POP_TOP
|
|
4 LOAD_CONST 0 (None)
|
|
7 RETURN_VALUE
|
|
"""
|
|
|
|
dis_module_expected_results = """\
|
|
Disassembly of f:
|
|
4 0 LOAD_CONST 0 (None)
|
|
3 RETURN_VALUE
|
|
|
|
Disassembly of g:
|
|
5 0 LOAD_CONST 0 (None)
|
|
3 RETURN_VALUE
|
|
|
|
"""
|
|
|
|
expr_str = "x + 1"
|
|
|
|
dis_expr_str = """\
|
|
1 0 LOAD_NAME 0 (x)
|
|
3 LOAD_CONST 0 (1)
|
|
6 BINARY_ADD
|
|
7 RETURN_VALUE
|
|
"""
|
|
|
|
simple_stmt_str = "x = x + 1"
|
|
|
|
dis_simple_stmt_str = """\
|
|
1 0 LOAD_NAME 0 (x)
|
|
3 LOAD_CONST 0 (1)
|
|
6 BINARY_ADD
|
|
7 STORE_NAME 0 (x)
|
|
10 LOAD_CONST 1 (None)
|
|
13 RETURN_VALUE
|
|
"""
|
|
|
|
compound_stmt_str = """\
|
|
x = 0
|
|
while 1:
|
|
x += 1"""
|
|
# Trailing newline has been deliberately omitted
|
|
|
|
dis_compound_stmt_str = """\
|
|
1 0 LOAD_CONST 0 (0)
|
|
3 STORE_NAME 0 (x)
|
|
|
|
2 6 SETUP_LOOP 13 (to 22)
|
|
|
|
3 >> 9 LOAD_NAME 0 (x)
|
|
12 LOAD_CONST 1 (1)
|
|
15 INPLACE_ADD
|
|
16 STORE_NAME 0 (x)
|
|
19 JUMP_ABSOLUTE 9
|
|
>> 22 LOAD_CONST 2 (None)
|
|
25 RETURN_VALUE
|
|
"""
|
|
|
|
class DisTests(unittest.TestCase):
|
|
def do_disassembly_test(self, func, expected):
|
|
s = io.StringIO()
|
|
save_stdout = sys.stdout
|
|
sys.stdout = s
|
|
dis.dis(func)
|
|
sys.stdout = save_stdout
|
|
got = s.getvalue()
|
|
# Trim trailing blanks (if any).
|
|
lines = got.split('\n')
|
|
lines = [line.rstrip() for line in lines]
|
|
expected = expected.split("\n")
|
|
import difflib
|
|
if expected != lines:
|
|
self.fail(
|
|
"events did not match expectation:\n" +
|
|
"\n".join(difflib.ndiff(expected,
|
|
lines)))
|
|
|
|
def test_opmap(self):
|
|
self.assertEqual(dis.opmap["STOP_CODE"], 0)
|
|
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_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):
|
|
# XXX: re-enable this test!
|
|
# This one is checking bytecodes generated for an `assert` statement,
|
|
# so fails if the tests are run with -O. Skip this test then.
|
|
pass # Test has been disabled due to change in the way
|
|
# list comps are handled. The byte code now includes
|
|
# a memory address and a file location, so they change from
|
|
# run to run.
|
|
# if __debug__:
|
|
# self.do_disassembly_test(bug1333982, dis_bug1333982)
|
|
|
|
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, 5000, 10):
|
|
expected = _BIG_LINENO_FORMAT % (i + 2)
|
|
self.do_disassembly_test(func(i), expected)
|
|
|
|
def test_big_linenos(self):
|
|
from test import dis_module
|
|
self.do_disassembly_test(dis_module, dis_module_expected_results)
|
|
|
|
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(compound_stmt_str, dis_compound_stmt_str)
|
|
|
|
code_info_code_info = """\
|
|
Name: code_info
|
|
Filename: (.*)
|
|
Argument count: 1
|
|
Kw-only arguments: 0
|
|
Number of locals: 1
|
|
Stack size: 4
|
|
Flags: OPTIMIZED, NEWLOCALS, NOFREE
|
|
Constants:
|
|
0: %r
|
|
1: '__func__'
|
|
2: '__code__'
|
|
3: '<code_info>'
|
|
4: 'co_code'
|
|
5: "don't know how to disassemble %%s objects"
|
|
%sNames:
|
|
0: hasattr
|
|
1: __func__
|
|
2: __code__
|
|
3: isinstance
|
|
4: str
|
|
5: _try_compile
|
|
6: _format_code_info
|
|
7: TypeError
|
|
8: type
|
|
9: __name__
|
|
Variable names:
|
|
0: x""" % (('Formatted details of methods, functions, or code.', ' 6: None\n')
|
|
if sys.flags.optimize < 2 else (None, ''))
|
|
|
|
@staticmethod
|
|
def tricky(x, y, z=True, *args, c, d, e=[], **kwds):
|
|
def f(c=c):
|
|
print(x, y, z, c, d, e, f)
|
|
yield x, y, z, c, d, e, f
|
|
|
|
code_info_tricky = """\
|
|
Name: tricky
|
|
Filename: (.*)
|
|
Argument count: 3
|
|
Kw-only arguments: 3
|
|
Number of locals: 8
|
|
Stack size: 7
|
|
Flags: OPTIMIZED, NEWLOCALS, VARARGS, VARKEYWORDS, GENERATOR
|
|
Constants:
|
|
0: None
|
|
1: <code object f at (.*), file "(.*)", line (.*)>
|
|
Variable names:
|
|
0: x
|
|
1: y
|
|
2: z
|
|
3: c
|
|
4: d
|
|
5: e
|
|
6: args
|
|
7: kwds
|
|
Cell variables:
|
|
0: e
|
|
1: d
|
|
2: f
|
|
3: y
|
|
4: x
|
|
5: z"""
|
|
|
|
co_tricky_nested_f = tricky.__func__.__code__.co_consts[1]
|
|
|
|
code_info_tricky_nested_f = """\
|
|
Name: f
|
|
Filename: (.*)
|
|
Argument count: 1
|
|
Kw-only arguments: 0
|
|
Number of locals: 1
|
|
Stack size: 8
|
|
Flags: OPTIMIZED, NEWLOCALS, NESTED
|
|
Constants:
|
|
0: None
|
|
Names:
|
|
0: print
|
|
Variable names:
|
|
0: c
|
|
Free variables:
|
|
0: e
|
|
1: d
|
|
2: f
|
|
3: y
|
|
4: x
|
|
5: z"""
|
|
|
|
code_info_expr_str = """\
|
|
Name: <module>
|
|
Filename: <code_info>
|
|
Argument count: 0
|
|
Kw-only arguments: 0
|
|
Number of locals: 0
|
|
Stack size: 2
|
|
Flags: NOFREE
|
|
Constants:
|
|
0: 1
|
|
Names:
|
|
0: x"""
|
|
|
|
code_info_simple_stmt_str = """\
|
|
Name: <module>
|
|
Filename: <code_info>
|
|
Argument count: 0
|
|
Kw-only arguments: 0
|
|
Number of locals: 0
|
|
Stack size: 2
|
|
Flags: NOFREE
|
|
Constants:
|
|
0: 1
|
|
1: None
|
|
Names:
|
|
0: x"""
|
|
|
|
code_info_compound_stmt_str = """\
|
|
Name: <module>
|
|
Filename: <code_info>
|
|
Argument count: 0
|
|
Kw-only arguments: 0
|
|
Number of locals: 0
|
|
Stack size: 2
|
|
Flags: NOFREE
|
|
Constants:
|
|
0: 0
|
|
1: 1
|
|
2: None
|
|
Names:
|
|
0: x"""
|
|
|
|
class CodeInfoTests(unittest.TestCase):
|
|
test_pairs = [
|
|
(dis.code_info, code_info_code_info),
|
|
(tricky, code_info_tricky),
|
|
(co_tricky_nested_f, code_info_tricky_nested_f),
|
|
(expr_str, code_info_expr_str),
|
|
(simple_stmt_str, code_info_simple_stmt_str),
|
|
(compound_stmt_str, code_info_compound_stmt_str),
|
|
]
|
|
|
|
def test_code_info(self):
|
|
self.maxDiff = 1000
|
|
for x, expected in self.test_pairs:
|
|
self.assertRegex(dis.code_info(x), expected)
|
|
|
|
def test_show_code(self):
|
|
self.maxDiff = 1000
|
|
for x, expected in self.test_pairs:
|
|
with captured_stdout() as output:
|
|
dis.show_code(x)
|
|
self.assertRegex(output.getvalue(), expected+"\n")
|
|
|
|
def test_main():
|
|
run_unittest(DisTests, CodeInfoTests)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|