mirror of
https://github.com/python/cpython.git
synced 2024-11-21 12:59:38 +01:00
78068126a1
* Remove UNARY_POSITIVE, LIST_TO_TUPLE and ASYNC_GEN_WRAP, replacing them with intrinsics.
112 lines
3.7 KiB
Python
112 lines
3.7 KiB
Python
import dis
|
|
import textwrap
|
|
import unittest
|
|
|
|
from test import support
|
|
from test.support import os_helper
|
|
from test.support.script_helper import assert_python_ok
|
|
|
|
def example():
|
|
x = []
|
|
for i in range(0):
|
|
x.append(i)
|
|
x = "this is"
|
|
y = "an example"
|
|
print(x, y)
|
|
|
|
|
|
@unittest.skipUnless(support.Py_DEBUG, "lltrace requires Py_DEBUG")
|
|
class TestLLTrace(unittest.TestCase):
|
|
|
|
def run_code(self, code):
|
|
code = textwrap.dedent(code).strip()
|
|
with open(os_helper.TESTFN, 'w', encoding='utf-8') as fd:
|
|
self.addCleanup(os_helper.unlink, os_helper.TESTFN)
|
|
fd.write(code)
|
|
status, stdout, stderr = assert_python_ok(os_helper.TESTFN)
|
|
self.assertEqual(stderr, b"")
|
|
self.assertEqual(status, 0)
|
|
result = stdout.decode('utf-8')
|
|
if support.verbose:
|
|
print("\n\n--- code ---")
|
|
print(code)
|
|
print("\n--- stdout ---")
|
|
print(result)
|
|
print()
|
|
return result
|
|
|
|
def test_lltrace(self):
|
|
stdout = self.run_code("""
|
|
def dont_trace_1():
|
|
a = "a"
|
|
a = 10 * a
|
|
def trace_me():
|
|
for i in range(3):
|
|
+i
|
|
def dont_trace_2():
|
|
x = 42
|
|
y = -x
|
|
dont_trace_1()
|
|
__lltrace__ = 1
|
|
trace_me()
|
|
del __lltrace__
|
|
dont_trace_2()
|
|
""")
|
|
self.assertIn("GET_ITER", stdout)
|
|
self.assertIn("FOR_ITER", stdout)
|
|
self.assertIn("CALL_INTRINSIC_1", stdout)
|
|
self.assertIn("POP_TOP", stdout)
|
|
self.assertNotIn("BINARY_OP", stdout)
|
|
self.assertNotIn("UNARY_NEGATIVE", stdout)
|
|
|
|
self.assertIn("'trace_me' in module '__main__'", stdout)
|
|
self.assertNotIn("dont_trace_1", stdout)
|
|
self.assertNotIn("'dont_trace_2' in module", stdout)
|
|
|
|
def test_lltrace_different_module(self):
|
|
stdout = self.run_code("""
|
|
from test import test_lltrace
|
|
test_lltrace.__lltrace__ = 1
|
|
test_lltrace.example()
|
|
""")
|
|
self.assertIn("'example' in module 'test.test_lltrace'", stdout)
|
|
self.assertIn('LOAD_CONST', stdout)
|
|
self.assertIn('FOR_ITER', stdout)
|
|
self.assertIn('this is an example', stdout)
|
|
|
|
# check that offsets match the output of dis.dis()
|
|
instr_map = {i.offset: i for i in dis.get_instructions(example, adaptive=True)}
|
|
for line in stdout.splitlines():
|
|
offset, colon, opname_oparg = line.partition(":")
|
|
if not colon:
|
|
continue
|
|
offset = int(offset)
|
|
opname_oparg = opname_oparg.split()
|
|
if len(opname_oparg) == 2:
|
|
opname, oparg = opname_oparg
|
|
oparg = int(oparg)
|
|
else:
|
|
(opname,) = opname_oparg
|
|
oparg = None
|
|
self.assertEqual(instr_map[offset].opname, opname)
|
|
self.assertEqual(instr_map[offset].arg, oparg)
|
|
|
|
def test_lltrace_does_not_crash_on_subscript_operator(self):
|
|
# If this test fails, it will reproduce a crash reported as
|
|
# bpo-34113. The crash happened at the command line console of
|
|
# debug Python builds with __lltrace__ enabled (only possible in console),
|
|
# when the internal Python stack was negatively adjusted
|
|
stdout = self.run_code("""
|
|
import code
|
|
|
|
console = code.InteractiveConsole()
|
|
console.push('__lltrace__ = 1')
|
|
console.push('a = [1, 2, 3]')
|
|
console.push('a[0] = 1')
|
|
print('unreachable if bug exists')
|
|
""")
|
|
self.assertIn("unreachable if bug exists", stdout)
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|