2240 lines
62 KiB
Python
2240 lines
62 KiB
Python
# Testing the line trace facility.
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from test import support
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import unittest
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from unittest.mock import MagicMock
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import sys
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import difflib
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import gc
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from functools import wraps
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import asyncio
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class tracecontext:
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"""Context manager that traces its enter and exit."""
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def __init__(self, output, value):
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self.output = output
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self.value = value
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def __enter__(self):
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self.output.append(self.value)
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def __exit__(self, *exc_info):
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self.output.append(-self.value)
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class asynctracecontext:
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"""Asynchronous context manager that traces its aenter and aexit."""
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def __init__(self, output, value):
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self.output = output
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self.value = value
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async def __aenter__(self):
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self.output.append(self.value)
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async def __aexit__(self, *exc_info):
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self.output.append(-self.value)
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async def asynciter(iterable):
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"""Convert an iterable to an asynchronous iterator."""
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for x in iterable:
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yield x
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# A very basic example. If this fails, we're in deep trouble.
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def basic():
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return 1
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basic.events = [(0, 'call'),
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(1, 'line'),
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(1, 'return')]
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# Many of the tests below are tricky because they involve pass statements.
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# If there is implicit control flow around a pass statement (in an except
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# clause or else clause) under what conditions do you set a line number
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# following that clause?
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# Some constructs like "while 0:", "if 0:" or "if 1:...else:..." could be optimized
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# away. Make sure that those lines aren't skipped.
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def arigo_example0():
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x = 1
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del x
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while 0:
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pass
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x = 1
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arigo_example0.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(5, 'line'),
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(5, 'return')]
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def arigo_example1():
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x = 1
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del x
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if 0:
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pass
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x = 1
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arigo_example1.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(5, 'line'),
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(5, 'return')]
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def arigo_example2():
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x = 1
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del x
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if 1:
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x = 1
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else:
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pass
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return None
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arigo_example2.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(4, 'line'),
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(7, 'line'),
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(7, 'return')]
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# check that lines consisting of just one instruction get traced:
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def one_instr_line():
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x = 1
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del x
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x = 1
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one_instr_line.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(3, 'return')]
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def no_pop_tops(): # 0
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x = 1 # 1
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for a in range(2): # 2
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if a: # 3
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x = 1 # 4
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else: # 5
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x = 1 # 6
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no_pop_tops.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(6, 'line'),
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(2, 'line'),
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(3, 'line'),
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(4, 'line'),
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(2, 'line'),
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(2, 'return')]
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def no_pop_blocks():
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y = 1
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while not y:
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bla
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x = 1
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no_pop_blocks.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(4, 'line'),
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(4, 'return')]
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def called(): # line -3
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x = 1
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def call(): # line 0
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called()
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call.events = [(0, 'call'),
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(1, 'line'),
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(-3, 'call'),
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(-2, 'line'),
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(-2, 'return'),
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(1, 'return')]
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def raises():
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raise Exception
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def test_raise():
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try:
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raises()
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except Exception:
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pass
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test_raise.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(-3, 'call'),
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(-2, 'line'),
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(-2, 'exception'),
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(-2, 'return'),
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(2, 'exception'),
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(3, 'line'),
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(4, 'line'),
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(4, 'return')]
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def _settrace_and_return(tracefunc):
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sys.settrace(tracefunc)
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sys._getframe().f_back.f_trace = tracefunc
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def settrace_and_return(tracefunc):
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_settrace_and_return(tracefunc)
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settrace_and_return.events = [(1, 'return')]
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def _settrace_and_raise(tracefunc):
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sys.settrace(tracefunc)
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sys._getframe().f_back.f_trace = tracefunc
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raise RuntimeError
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def settrace_and_raise(tracefunc):
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try:
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_settrace_and_raise(tracefunc)
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except RuntimeError:
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pass
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settrace_and_raise.events = [(2, 'exception'),
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(3, 'line'),
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(4, 'line'),
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(4, 'return')]
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# implicit return example
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# This test is interesting because of the else: pass
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# part of the code. The code generate for the true
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# part of the if contains a jump past the else branch.
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# The compiler then generates an implicit "return None"
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# Internally, the compiler visits the pass statement
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# and stores its line number for use on the next instruction.
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# The next instruction is the implicit return None.
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def ireturn_example():
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a = 5
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b = 5
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if a == b:
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b = a+1
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else:
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pass
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ireturn_example.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(4, 'line'),
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(4, 'return')]
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# Tight loop with while(1) example (SF #765624)
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def tightloop_example():
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items = range(0, 3)
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try:
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i = 0
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while 1:
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b = items[i]; i+=1
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except IndexError:
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pass
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tightloop_example.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(4, 'line'),
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(5, 'line'),
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(4, 'line'),
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(5, 'line'),
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(4, 'line'),
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(5, 'line'),
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(4, 'line'),
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(5, 'line'),
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(5, 'exception'),
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(6, 'line'),
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(7, 'line'),
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(7, 'return')]
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def tighterloop_example():
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items = range(1, 4)
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try:
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i = 0
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while 1: i = items[i]
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except IndexError:
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pass
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tighterloop_example.events = [(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(4, 'line'),
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(4, 'line'),
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(4, 'line'),
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(4, 'line'),
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(4, 'exception'),
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(5, 'line'),
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(6, 'line'),
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(6, 'return')]
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def generator_function():
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try:
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yield True
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"continued"
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finally:
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"finally"
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def generator_example():
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# any() will leave the generator before its end
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x = any(generator_function())
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# the following lines were not traced
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for x in range(10):
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y = x
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generator_example.events = ([(0, 'call'),
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(2, 'line'),
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(-6, 'call'),
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(-5, 'line'),
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(-4, 'line'),
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(-4, 'return'),
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(-4, 'call'),
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(-4, 'exception'),
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(-1, 'line'),
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(-1, 'return')] +
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[(5, 'line'), (6, 'line')] * 10 +
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[(5, 'line'), (5, 'return')])
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class Tracer:
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def __init__(self, trace_line_events=None, trace_opcode_events=None):
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self.trace_line_events = trace_line_events
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self.trace_opcode_events = trace_opcode_events
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self.events = []
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def _reconfigure_frame(self, frame):
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if self.trace_line_events is not None:
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frame.f_trace_lines = self.trace_line_events
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if self.trace_opcode_events is not None:
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frame.f_trace_opcodes = self.trace_opcode_events
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def trace(self, frame, event, arg):
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self._reconfigure_frame(frame)
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self.events.append((frame.f_lineno, event))
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return self.trace
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def traceWithGenexp(self, frame, event, arg):
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self._reconfigure_frame(frame)
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(o for o in [1])
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self.events.append((frame.f_lineno, event))
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return self.trace
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class TraceTestCase(unittest.TestCase):
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# Disable gc collection when tracing, otherwise the
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# deallocators may be traced as well.
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def setUp(self):
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self.using_gc = gc.isenabled()
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gc.disable()
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self.addCleanup(sys.settrace, sys.gettrace())
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def tearDown(self):
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if self.using_gc:
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gc.enable()
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@staticmethod
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def make_tracer():
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"""Helper to allow test subclasses to configure tracers differently"""
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return Tracer()
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def compare_events(self, line_offset, events, expected_events):
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events = [(l - line_offset, e) for (l, e) in events]
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if events != expected_events:
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self.fail(
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"events did not match expectation:\n" +
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"\n".join(difflib.ndiff([str(x) for x in expected_events],
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[str(x) for x in events])))
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def run_and_compare(self, func, events):
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tracer = self.make_tracer()
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sys.settrace(tracer.trace)
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func()
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sys.settrace(None)
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self.compare_events(func.__code__.co_firstlineno,
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tracer.events, events)
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def run_test(self, func):
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self.run_and_compare(func, func.events)
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def run_test2(self, func):
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tracer = self.make_tracer()
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func(tracer.trace)
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sys.settrace(None)
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self.compare_events(func.__code__.co_firstlineno,
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tracer.events, func.events)
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def test_set_and_retrieve_none(self):
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sys.settrace(None)
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assert sys.gettrace() is None
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def test_set_and_retrieve_func(self):
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def fn(*args):
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pass
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sys.settrace(fn)
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try:
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assert sys.gettrace() is fn
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finally:
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sys.settrace(None)
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def test_01_basic(self):
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self.run_test(basic)
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def test_02_arigo0(self):
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self.run_test(arigo_example0)
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def test_02_arigo1(self):
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self.run_test(arigo_example1)
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def test_02_arigo2(self):
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self.run_test(arigo_example2)
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def test_03_one_instr(self):
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self.run_test(one_instr_line)
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def test_04_no_pop_blocks(self):
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self.run_test(no_pop_blocks)
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def test_05_no_pop_tops(self):
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self.run_test(no_pop_tops)
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def test_06_call(self):
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self.run_test(call)
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def test_07_raise(self):
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self.run_test(test_raise)
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def test_08_settrace_and_return(self):
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self.run_test2(settrace_and_return)
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def test_09_settrace_and_raise(self):
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self.run_test2(settrace_and_raise)
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def test_10_ireturn(self):
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self.run_test(ireturn_example)
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def test_11_tightloop(self):
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self.run_test(tightloop_example)
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def test_12_tighterloop(self):
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self.run_test(tighterloop_example)
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def test_13_genexp(self):
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self.run_test(generator_example)
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# issue1265: if the trace function contains a generator,
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# and if the traced function contains another generator
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# that is not completely exhausted, the trace stopped.
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# Worse: the 'finally' clause was not invoked.
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tracer = self.make_tracer()
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sys.settrace(tracer.traceWithGenexp)
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generator_example()
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sys.settrace(None)
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self.compare_events(generator_example.__code__.co_firstlineno,
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tracer.events, generator_example.events)
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def test_14_onliner_if(self):
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def onliners():
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if True: x=False
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else: x=True
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return 0
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self.run_and_compare(
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onliners,
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[(0, 'call'),
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(1, 'line'),
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(3, 'line'),
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(3, 'return')])
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def test_15_loops(self):
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# issue1750076: "while" expression is skipped by debugger
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def for_example():
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for x in range(2):
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pass
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self.run_and_compare(
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for_example,
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[(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(1, 'line'),
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(2, 'line'),
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(1, 'line'),
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(1, 'return')])
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def while_example():
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# While expression should be traced on every loop
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x = 2
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while x > 0:
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x -= 1
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self.run_and_compare(
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while_example,
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[(0, 'call'),
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(2, 'line'),
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(3, 'line'),
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(4, 'line'),
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(3, 'line'),
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(4, 'line'),
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(3, 'line'),
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(3, 'return')])
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def test_16_blank_lines(self):
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namespace = {}
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exec("def f():\n" + "\n" * 256 + " pass", namespace)
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self.run_and_compare(
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namespace["f"],
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[(0, 'call'),
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(257, 'line'),
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(257, 'return')])
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def test_17_none_f_trace(self):
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# Issue 20041: fix TypeError when f_trace is set to None.
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def func():
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sys._getframe().f_trace = None
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lineno = 2
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self.run_and_compare(func,
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[(0, 'call'),
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(1, 'line')])
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def test_18_except_with_name(self):
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def func():
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try:
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try:
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raise Exception
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except Exception as e:
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raise
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x = "Something"
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y = "Something"
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except Exception:
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pass
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self.run_and_compare(func,
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[(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(3, 'exception'),
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(4, 'line'),
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(5, 'line'),
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(8, 'line'),
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(9, 'line'),
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(9, 'return')])
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def test_19_except_with_finally(self):
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def func():
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try:
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try:
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raise Exception
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finally:
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y = "Something"
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except Exception:
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b = 23
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self.run_and_compare(func,
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[(0, 'call'),
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(1, 'line'),
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(2, 'line'),
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(3, 'line'),
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(3, 'exception'),
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(5, 'line'),
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(6, 'line'),
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(7, 'line'),
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(7, 'return')])
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def test_20_async_for_loop(self):
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class AsyncIteratorWrapper:
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def __init__(self, obj):
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self._it = iter(obj)
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def __aiter__(self):
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return self
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async def __anext__(self):
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try:
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return next(self._it)
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except StopIteration:
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raise StopAsyncIteration
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|
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async def doit_async():
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async for letter in AsyncIteratorWrapper("abc"):
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x = letter
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y = 42
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def run(tracer):
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x = doit_async()
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try:
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sys.settrace(tracer)
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x.send(None)
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finally:
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sys.settrace(None)
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tracer = self.make_tracer()
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events = [
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(0, 'call'),
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(1, 'line'),
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(-12, 'call'),
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(-11, 'line'),
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(-11, 'return'),
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(-9, 'call'),
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(-8, 'line'),
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(-8, 'return'),
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(-6, 'call'),
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(-5, 'line'),
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(-4, 'line'),
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(-4, 'return'),
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(1, 'exception'),
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(2, 'line'),
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(1, 'line'),
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(-6, 'call'),
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(-5, 'line'),
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(-4, 'line'),
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(-4, 'return'),
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(1, 'exception'),
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(2, 'line'),
|
|
(1, 'line'),
|
|
(-6, 'call'),
|
|
(-5, 'line'),
|
|
(-4, 'line'),
|
|
(-4, 'return'),
|
|
(1, 'exception'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(-6, 'call'),
|
|
(-5, 'line'),
|
|
(-4, 'line'),
|
|
(-4, 'exception'),
|
|
(-3, 'line'),
|
|
(-2, 'line'),
|
|
(-2, 'exception'),
|
|
(-2, 'return'),
|
|
(1, 'exception'),
|
|
(3, 'line'),
|
|
(3, 'return')]
|
|
try:
|
|
run(tracer.trace)
|
|
except Exception:
|
|
pass
|
|
self.compare_events(doit_async.__code__.co_firstlineno,
|
|
tracer.events, events)
|
|
|
|
def test_async_for_backwards_jump_has_no_line(self):
|
|
async def arange(n):
|
|
for i in range(n):
|
|
yield i
|
|
async def f():
|
|
async for i in arange(3):
|
|
if i > 100:
|
|
break # should never be traced
|
|
|
|
tracer = self.make_tracer()
|
|
coro = f()
|
|
try:
|
|
sys.settrace(tracer.trace)
|
|
coro.send(None)
|
|
except Exception:
|
|
pass
|
|
finally:
|
|
sys.settrace(None)
|
|
|
|
events = [
|
|
(0, 'call'),
|
|
(1, 'line'),
|
|
(-3, 'call'),
|
|
(-2, 'line'),
|
|
(-1, 'line'),
|
|
(-1, 'return'),
|
|
(1, 'exception'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(-1, 'call'),
|
|
(-2, 'line'),
|
|
(-1, 'line'),
|
|
(-1, 'return'),
|
|
(1, 'exception'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(-1, 'call'),
|
|
(-2, 'line'),
|
|
(-1, 'line'),
|
|
(-1, 'return'),
|
|
(1, 'exception'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(-1, 'call'),
|
|
(-2, 'line'),
|
|
(-2, 'return'),
|
|
(1, 'exception'),
|
|
(1, 'return'),
|
|
]
|
|
self.compare_events(f.__code__.co_firstlineno,
|
|
tracer.events, events)
|
|
|
|
def test_21_repeated_pass(self):
|
|
def func():
|
|
pass
|
|
pass
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(2, 'return')])
|
|
|
|
def test_loop_in_try_except(self):
|
|
# https://bugs.python.org/issue41670
|
|
|
|
def func():
|
|
try:
|
|
for i in []: pass
|
|
return 1
|
|
except:
|
|
return 2
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(3, 'return')])
|
|
|
|
def test_try_except_no_exception(self):
|
|
|
|
def func():
|
|
try:
|
|
2
|
|
except:
|
|
4
|
|
finally:
|
|
6
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(6, 'line'),
|
|
(6, 'return')])
|
|
|
|
def test_nested_loops(self):
|
|
|
|
def func():
|
|
for i in range(2):
|
|
for j in range(2):
|
|
a = i + j
|
|
return a == 1
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(4, 'line'),
|
|
(4, 'return')])
|
|
|
|
def test_if_break(self):
|
|
|
|
def func():
|
|
seq = [1, 0]
|
|
while seq:
|
|
n = seq.pop()
|
|
if n:
|
|
break # line 5
|
|
else:
|
|
n = 99
|
|
return n # line 8
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(8, 'line'),
|
|
(8, 'return')])
|
|
|
|
def test_break_through_finally(self):
|
|
|
|
def func():
|
|
a, c, d, i = 1, 1, 1, 99
|
|
try:
|
|
for i in range(3):
|
|
try:
|
|
a = 5
|
|
if i > 0:
|
|
break # line 7
|
|
a = 8
|
|
finally:
|
|
c = 10
|
|
except:
|
|
d = 12 # line 12
|
|
assert a == 5 and c == 10 and d == 1 # line 13
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(6, 'line'),
|
|
(8, 'line'),
|
|
(10, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(6, 'line'),
|
|
(7, 'line'),
|
|
(10, 'line'),
|
|
(13, 'line'),
|
|
(13, 'return')])
|
|
|
|
def test_continue_through_finally(self):
|
|
|
|
def func():
|
|
a, b, c, d, i = 1, 1, 1, 1, 99
|
|
try:
|
|
for i in range(2):
|
|
try:
|
|
a = 5
|
|
if i > 0:
|
|
continue # line 7
|
|
b = 8
|
|
finally:
|
|
c = 10
|
|
except:
|
|
d = 12 # line 12
|
|
assert (a, b, c, d) == (5, 8, 10, 1) # line 13
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(6, 'line'),
|
|
(8, 'line'),
|
|
(10, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(6, 'line'),
|
|
(7, 'line'),
|
|
(10, 'line'),
|
|
(3, 'line'),
|
|
(13, 'line'),
|
|
(13, 'return')])
|
|
|
|
def test_return_through_finally(self):
|
|
|
|
def func():
|
|
try:
|
|
return 2
|
|
finally:
|
|
4
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(4, 'line'),
|
|
(4, 'return')])
|
|
|
|
def test_try_except_with_wrong_type(self):
|
|
|
|
def func():
|
|
try:
|
|
2/0
|
|
except IndexError:
|
|
4
|
|
finally:
|
|
return 6
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(2, 'exception'),
|
|
(3, 'line'),
|
|
(6, 'line'),
|
|
(6, 'return')])
|
|
|
|
def test_break_to_continue1(self):
|
|
|
|
def func():
|
|
TRUE = 1
|
|
x = [1]
|
|
while x:
|
|
x.pop()
|
|
while TRUE:
|
|
break
|
|
continue
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(6, 'line'),
|
|
(7, 'line'),
|
|
(3, 'line'),
|
|
(3, 'return')])
|
|
|
|
def test_break_to_continue2(self):
|
|
|
|
def func():
|
|
TRUE = 1
|
|
x = [1]
|
|
while x:
|
|
x.pop()
|
|
while TRUE:
|
|
break
|
|
else:
|
|
continue
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(6, 'line'),
|
|
(3, 'line'),
|
|
(3, 'return')])
|
|
|
|
def test_break_to_break(self):
|
|
|
|
def func():
|
|
TRUE = 1
|
|
while TRUE:
|
|
while TRUE:
|
|
break
|
|
break
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(5, 'return')])
|
|
|
|
def test_nested_ifs(self):
|
|
|
|
def func():
|
|
a = b = 1
|
|
if a == 1:
|
|
if b == 1:
|
|
x = 4
|
|
else:
|
|
y = 6
|
|
else:
|
|
z = 8
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(4, 'line'),
|
|
(4, 'return')])
|
|
|
|
def test_nested_ifs_with_and(self):
|
|
|
|
def func():
|
|
if A:
|
|
if B:
|
|
if C:
|
|
if D:
|
|
return False
|
|
else:
|
|
return False
|
|
elif E and F:
|
|
return True
|
|
|
|
A = B = True
|
|
C = False
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(3, 'return')])
|
|
|
|
def test_nested_try_if(self):
|
|
|
|
def func():
|
|
x = "hello"
|
|
try:
|
|
3/0
|
|
except ZeroDivisionError:
|
|
if x == 'raise':
|
|
raise ValueError() # line 6
|
|
f = 7
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(3, 'exception'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(7, 'line'),
|
|
(7, 'return')])
|
|
|
|
def test_if_false_in_with(self):
|
|
|
|
class C:
|
|
def __enter__(self):
|
|
return self
|
|
def __exit__(*args):
|
|
pass
|
|
|
|
def func():
|
|
with C():
|
|
if False:
|
|
pass
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(-5, 'call'),
|
|
(-4, 'line'),
|
|
(-4, 'return'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(-3, 'call'),
|
|
(-2, 'line'),
|
|
(-2, 'return'),
|
|
(1, 'return')])
|
|
|
|
def test_if_false_in_try_except(self):
|
|
|
|
def func():
|
|
try:
|
|
if False:
|
|
pass
|
|
except Exception:
|
|
X
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(2, 'return')])
|
|
|
|
def test_implicit_return_in_class(self):
|
|
|
|
def func():
|
|
class A:
|
|
if 3 < 9:
|
|
a = 1
|
|
else:
|
|
a = 2
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(1, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(3, 'return'),
|
|
(1, 'return')])
|
|
|
|
def test_try_in_try(self):
|
|
def func():
|
|
try:
|
|
try:
|
|
pass
|
|
except Exception as ex:
|
|
pass
|
|
except Exception:
|
|
pass
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(3, 'return')])
|
|
|
|
def test_if_in_if_in_if(self):
|
|
def func(a=0, p=1, z=1):
|
|
if p:
|
|
if a:
|
|
if z:
|
|
pass
|
|
else:
|
|
pass
|
|
else:
|
|
pass
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(2, 'return')])
|
|
|
|
def test_early_exit_with(self):
|
|
|
|
class C:
|
|
def __enter__(self):
|
|
return self
|
|
def __exit__(*args):
|
|
pass
|
|
|
|
def func_break():
|
|
for i in (1,2):
|
|
with C():
|
|
break
|
|
pass
|
|
|
|
def func_return():
|
|
with C():
|
|
return
|
|
|
|
self.run_and_compare(func_break,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(-5, 'call'),
|
|
(-4, 'line'),
|
|
(-4, 'return'),
|
|
(3, 'line'),
|
|
(2, 'line'),
|
|
(-3, 'call'),
|
|
(-2, 'line'),
|
|
(-2, 'return'),
|
|
(4, 'line'),
|
|
(4, 'return')])
|
|
|
|
self.run_and_compare(func_return,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(-11, 'call'),
|
|
(-10, 'line'),
|
|
(-10, 'return'),
|
|
(2, 'line'),
|
|
(1, 'line'),
|
|
(-9, 'call'),
|
|
(-8, 'line'),
|
|
(-8, 'return'),
|
|
(1, 'return')])
|
|
|
|
def test_flow_converges_on_same_line(self):
|
|
|
|
def foo(x):
|
|
if x:
|
|
try:
|
|
1/(x - 1)
|
|
except ZeroDivisionError:
|
|
pass
|
|
return x
|
|
|
|
def func():
|
|
for i in range(2):
|
|
foo(i)
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(-8, 'call'),
|
|
(-7, 'line'),
|
|
(-2, 'line'),
|
|
(-2, 'return'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(-8, 'call'),
|
|
(-7, 'line'),
|
|
(-6, 'line'),
|
|
(-5, 'line'),
|
|
(-5, 'exception'),
|
|
(-4, 'line'),
|
|
(-3, 'line'),
|
|
(-2, 'line'),
|
|
(-2, 'return'),
|
|
(1, 'line'),
|
|
(1, 'return')])
|
|
|
|
def test_no_tracing_of_named_except_cleanup(self):
|
|
|
|
def func():
|
|
x = 0
|
|
try:
|
|
1/x
|
|
except ZeroDivisionError as error:
|
|
if x:
|
|
raise
|
|
return "done"
|
|
|
|
self.run_and_compare(func,
|
|
[(0, 'call'),
|
|
(1, 'line'),
|
|
(2, 'line'),
|
|
(3, 'line'),
|
|
(3, 'exception'),
|
|
(4, 'line'),
|
|
(5, 'line'),
|
|
(7, 'line'),
|
|
(7, 'return')])
|
|
|
|
|
|
class SkipLineEventsTraceTestCase(TraceTestCase):
|
|
"""Repeat the trace tests, but with per-line events skipped"""
|
|
|
|
def compare_events(self, line_offset, events, expected_events):
|
|
skip_line_events = [e for e in expected_events if e[1] != 'line']
|
|
super().compare_events(line_offset, events, skip_line_events)
|
|
|
|
@staticmethod
|
|
def make_tracer():
|
|
return Tracer(trace_line_events=False)
|
|
|
|
|
|
@support.cpython_only
|
|
class TraceOpcodesTestCase(TraceTestCase):
|
|
"""Repeat the trace tests, but with per-opcodes events enabled"""
|
|
|
|
def compare_events(self, line_offset, events, expected_events):
|
|
skip_opcode_events = [e for e in events if e[1] != 'opcode']
|
|
if len(events) > 1:
|
|
self.assertLess(len(skip_opcode_events), len(events),
|
|
msg="No 'opcode' events received by the tracer")
|
|
super().compare_events(line_offset, skip_opcode_events, expected_events)
|
|
|
|
@staticmethod
|
|
def make_tracer():
|
|
return Tracer(trace_opcode_events=True)
|
|
|
|
|
|
class RaisingTraceFuncTestCase(unittest.TestCase):
|
|
def setUp(self):
|
|
self.addCleanup(sys.settrace, sys.gettrace())
|
|
|
|
def trace(self, frame, event, arg):
|
|
"""A trace function that raises an exception in response to a
|
|
specific trace event."""
|
|
if event == self.raiseOnEvent:
|
|
raise ValueError # just something that isn't RuntimeError
|
|
else:
|
|
return self.trace
|
|
|
|
def f(self):
|
|
"""The function to trace; raises an exception if that's the case
|
|
we're testing, so that the 'exception' trace event fires."""
|
|
if self.raiseOnEvent == 'exception':
|
|
x = 0
|
|
y = 1/x
|
|
else:
|
|
return 1
|
|
|
|
def run_test_for_event(self, event):
|
|
"""Tests that an exception raised in response to the given event is
|
|
handled OK."""
|
|
self.raiseOnEvent = event
|
|
try:
|
|
for i in range(sys.getrecursionlimit() + 1):
|
|
sys.settrace(self.trace)
|
|
try:
|
|
self.f()
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
self.fail("exception not raised!")
|
|
except RuntimeError:
|
|
self.fail("recursion counter not reset")
|
|
|
|
# Test the handling of exceptions raised by each kind of trace event.
|
|
def test_call(self):
|
|
self.run_test_for_event('call')
|
|
def test_line(self):
|
|
self.run_test_for_event('line')
|
|
def test_return(self):
|
|
self.run_test_for_event('return')
|
|
def test_exception(self):
|
|
self.run_test_for_event('exception')
|
|
|
|
def test_trash_stack(self):
|
|
def f():
|
|
for i in range(5):
|
|
print(i) # line tracing will raise an exception at this line
|
|
|
|
def g(frame, why, extra):
|
|
if (why == 'line' and
|
|
frame.f_lineno == f.__code__.co_firstlineno + 2):
|
|
raise RuntimeError("i am crashing")
|
|
return g
|
|
|
|
sys.settrace(g)
|
|
try:
|
|
f()
|
|
except RuntimeError:
|
|
# the test is really that this doesn't segfault:
|
|
import gc
|
|
gc.collect()
|
|
else:
|
|
self.fail("exception not propagated")
|
|
|
|
|
|
def test_exception_arguments(self):
|
|
def f():
|
|
x = 0
|
|
# this should raise an error
|
|
x.no_such_attr
|
|
def g(frame, event, arg):
|
|
if (event == 'exception'):
|
|
type, exception, trace = arg
|
|
self.assertIsInstance(exception, Exception)
|
|
return g
|
|
|
|
existing = sys.gettrace()
|
|
try:
|
|
sys.settrace(g)
|
|
try:
|
|
f()
|
|
except AttributeError:
|
|
# this is expected
|
|
pass
|
|
finally:
|
|
sys.settrace(existing)
|
|
|
|
|
|
# 'Jump' tests: assigning to frame.f_lineno within a trace function
|
|
# moves the execution position - it's how debuggers implement a Jump
|
|
# command (aka. "Set next statement").
|
|
|
|
class JumpTracer:
|
|
"""Defines a trace function that jumps from one place to another."""
|
|
|
|
def __init__(self, function, jumpFrom, jumpTo, event='line',
|
|
decorated=False):
|
|
self.code = function.__code__
|
|
self.jumpFrom = jumpFrom
|
|
self.jumpTo = jumpTo
|
|
self.event = event
|
|
self.firstLine = None if decorated else self.code.co_firstlineno
|
|
self.done = False
|
|
|
|
def trace(self, frame, event, arg):
|
|
if self.done:
|
|
return
|
|
# frame.f_code.co_firstlineno is the first line of the decorator when
|
|
# 'function' is decorated and the decorator may be written using
|
|
# multiple physical lines when it is too long. Use the first line
|
|
# trace event in 'function' to find the first line of 'function'.
|
|
if (self.firstLine is None and frame.f_code == self.code and
|
|
event == 'line'):
|
|
self.firstLine = frame.f_lineno - 1
|
|
if (event == self.event and self.firstLine is not None and
|
|
frame.f_lineno == self.firstLine + self.jumpFrom):
|
|
f = frame
|
|
while f is not None and f.f_code != self.code:
|
|
f = f.f_back
|
|
if f is not None:
|
|
# Cope with non-integer self.jumpTo (because of
|
|
# no_jump_to_non_integers below).
|
|
try:
|
|
frame.f_lineno = self.firstLine + self.jumpTo
|
|
except TypeError:
|
|
frame.f_lineno = self.jumpTo
|
|
self.done = True
|
|
return self.trace
|
|
|
|
# This verifies the line-numbers-must-be-integers rule.
|
|
def no_jump_to_non_integers(output):
|
|
try:
|
|
output.append(2)
|
|
except ValueError as e:
|
|
output.append('integer' in str(e))
|
|
|
|
# This verifies that you can't set f_lineno via _getframe or similar
|
|
# trickery.
|
|
def no_jump_without_trace_function():
|
|
try:
|
|
previous_frame = sys._getframe().f_back
|
|
previous_frame.f_lineno = previous_frame.f_lineno
|
|
except ValueError as e:
|
|
# This is the exception we wanted; make sure the error message
|
|
# talks about trace functions.
|
|
if 'trace' not in str(e):
|
|
raise
|
|
else:
|
|
# Something's wrong - the expected exception wasn't raised.
|
|
raise AssertionError("Trace-function-less jump failed to fail")
|
|
|
|
|
|
class JumpTestCase(unittest.TestCase):
|
|
def setUp(self):
|
|
self.addCleanup(sys.settrace, sys.gettrace())
|
|
sys.settrace(None)
|
|
|
|
def compare_jump_output(self, expected, received):
|
|
if received != expected:
|
|
self.fail( "Outputs don't match:\n" +
|
|
"Expected: " + repr(expected) + "\n" +
|
|
"Received: " + repr(received))
|
|
|
|
def run_test(self, func, jumpFrom, jumpTo, expected, error=None,
|
|
event='line', decorated=False):
|
|
tracer = JumpTracer(func, jumpFrom, jumpTo, event, decorated)
|
|
sys.settrace(tracer.trace)
|
|
output = []
|
|
if error is None:
|
|
func(output)
|
|
else:
|
|
with self.assertRaisesRegex(*error):
|
|
func(output)
|
|
sys.settrace(None)
|
|
self.compare_jump_output(expected, output)
|
|
|
|
def run_async_test(self, func, jumpFrom, jumpTo, expected, error=None,
|
|
event='line', decorated=False):
|
|
tracer = JumpTracer(func, jumpFrom, jumpTo, event, decorated)
|
|
sys.settrace(tracer.trace)
|
|
output = []
|
|
if error is None:
|
|
asyncio.run(func(output))
|
|
else:
|
|
with self.assertRaisesRegex(*error):
|
|
asyncio.run(func(output))
|
|
sys.settrace(None)
|
|
asyncio.set_event_loop_policy(None)
|
|
self.compare_jump_output(expected, output)
|
|
|
|
def jump_test(jumpFrom, jumpTo, expected, error=None, event='line'):
|
|
"""Decorator that creates a test that makes a jump
|
|
from one place to another in the following code.
|
|
"""
|
|
def decorator(func):
|
|
@wraps(func)
|
|
def test(self):
|
|
self.run_test(func, jumpFrom, jumpTo, expected,
|
|
error=error, event=event, decorated=True)
|
|
return test
|
|
return decorator
|
|
|
|
def async_jump_test(jumpFrom, jumpTo, expected, error=None, event='line'):
|
|
"""Decorator that creates a test that makes a jump
|
|
from one place to another in the following asynchronous code.
|
|
"""
|
|
def decorator(func):
|
|
@wraps(func)
|
|
def test(self):
|
|
self.run_async_test(func, jumpFrom, jumpTo, expected,
|
|
error=error, event=event, decorated=True)
|
|
return test
|
|
return decorator
|
|
|
|
## The first set of 'jump' tests are for things that are allowed:
|
|
|
|
@jump_test(1, 3, [3])
|
|
def test_jump_simple_forwards(output):
|
|
output.append(1)
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
@jump_test(2, 1, [1, 1, 2])
|
|
def test_jump_simple_backwards(output):
|
|
output.append(1)
|
|
output.append(2)
|
|
|
|
@jump_test(3, 5, [2, 5])
|
|
def test_jump_out_of_block_forwards(output):
|
|
for i in 1, 2:
|
|
output.append(2)
|
|
for j in [3]: # Also tests jumping over a block
|
|
output.append(4)
|
|
output.append(5)
|
|
|
|
@jump_test(6, 1, [1, 3, 5, 1, 3, 5, 6, 7])
|
|
def test_jump_out_of_block_backwards(output):
|
|
output.append(1)
|
|
for i in [1]:
|
|
output.append(3)
|
|
for j in [2]: # Also tests jumping over a block
|
|
output.append(5)
|
|
output.append(6)
|
|
output.append(7)
|
|
|
|
@async_jump_test(4, 5, [3, 5])
|
|
async def test_jump_out_of_async_for_block_forwards(output):
|
|
for i in [1]:
|
|
async for i in asynciter([1, 2]):
|
|
output.append(3)
|
|
output.append(4)
|
|
output.append(5)
|
|
|
|
@async_jump_test(5, 2, [2, 4, 2, 4, 5, 6])
|
|
async def test_jump_out_of_async_for_block_backwards(output):
|
|
for i in [1]:
|
|
output.append(2)
|
|
async for i in asynciter([1]):
|
|
output.append(4)
|
|
output.append(5)
|
|
output.append(6)
|
|
|
|
@jump_test(1, 2, [3])
|
|
def test_jump_to_codeless_line(output):
|
|
output.append(1)
|
|
# Jumping to this line should skip to the next one.
|
|
output.append(3)
|
|
|
|
@jump_test(2, 2, [1, 2, 3])
|
|
def test_jump_to_same_line(output):
|
|
output.append(1)
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
# Tests jumping within a finally block, and over one.
|
|
@jump_test(4, 9, [2, 9])
|
|
def test_jump_in_nested_finally(output):
|
|
try:
|
|
output.append(2)
|
|
finally:
|
|
output.append(4)
|
|
try:
|
|
output.append(6)
|
|
finally:
|
|
output.append(8)
|
|
output.append(9)
|
|
|
|
@jump_test(6, 7, [2, 7], (ZeroDivisionError, ''))
|
|
def test_jump_in_nested_finally_2(output):
|
|
try:
|
|
output.append(2)
|
|
1/0
|
|
return
|
|
finally:
|
|
output.append(6)
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
@jump_test(6, 11, [2, 11], (ZeroDivisionError, ''))
|
|
def test_jump_in_nested_finally_3(output):
|
|
try:
|
|
output.append(2)
|
|
1/0
|
|
return
|
|
finally:
|
|
output.append(6)
|
|
try:
|
|
output.append(8)
|
|
finally:
|
|
output.append(10)
|
|
output.append(11)
|
|
output.append(12)
|
|
|
|
@jump_test(5, 11, [2, 4], (ValueError, 'after'))
|
|
def test_no_jump_over_return_try_finally_in_finally_block(output):
|
|
try:
|
|
output.append(2)
|
|
finally:
|
|
output.append(4)
|
|
output.append(5)
|
|
return
|
|
try:
|
|
output.append(8)
|
|
finally:
|
|
output.append(10)
|
|
pass
|
|
output.append(12)
|
|
|
|
@jump_test(3, 4, [1], (ValueError, 'after'))
|
|
def test_no_jump_infinite_while_loop(output):
|
|
output.append(1)
|
|
while True:
|
|
output.append(3)
|
|
output.append(4)
|
|
|
|
@jump_test(2, 4, [4, 4])
|
|
def test_jump_forwards_into_while_block(output):
|
|
i = 1
|
|
output.append(2)
|
|
while i <= 2:
|
|
output.append(4)
|
|
i += 1
|
|
|
|
@jump_test(5, 3, [3, 3, 3, 5])
|
|
def test_jump_backwards_into_while_block(output):
|
|
i = 1
|
|
while i <= 2:
|
|
output.append(3)
|
|
i += 1
|
|
output.append(5)
|
|
|
|
@jump_test(2, 3, [1, 3])
|
|
def test_jump_forwards_out_of_with_block(output):
|
|
with tracecontext(output, 1):
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
@async_jump_test(2, 3, [1, 3])
|
|
async def test_jump_forwards_out_of_async_with_block(output):
|
|
async with asynctracecontext(output, 1):
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
@jump_test(3, 1, [1, 2, 1, 2, 3, -2])
|
|
def test_jump_backwards_out_of_with_block(output):
|
|
output.append(1)
|
|
with tracecontext(output, 2):
|
|
output.append(3)
|
|
|
|
@async_jump_test(3, 1, [1, 2, 1, 2, 3, -2])
|
|
async def test_jump_backwards_out_of_async_with_block(output):
|
|
output.append(1)
|
|
async with asynctracecontext(output, 2):
|
|
output.append(3)
|
|
|
|
@jump_test(2, 5, [5])
|
|
def test_jump_forwards_out_of_try_finally_block(output):
|
|
try:
|
|
output.append(2)
|
|
finally:
|
|
output.append(4)
|
|
output.append(5)
|
|
|
|
@jump_test(3, 1, [1, 1, 3, 5])
|
|
def test_jump_backwards_out_of_try_finally_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
finally:
|
|
output.append(5)
|
|
|
|
@jump_test(2, 6, [6])
|
|
def test_jump_forwards_out_of_try_except_block(output):
|
|
try:
|
|
output.append(2)
|
|
except:
|
|
output.append(4)
|
|
raise
|
|
output.append(6)
|
|
|
|
@jump_test(3, 1, [1, 1, 3])
|
|
def test_jump_backwards_out_of_try_except_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
except:
|
|
output.append(5)
|
|
raise
|
|
|
|
@jump_test(5, 7, [4, 7, 8])
|
|
def test_jump_between_except_blocks(output):
|
|
try:
|
|
1/0
|
|
except ZeroDivisionError:
|
|
output.append(4)
|
|
output.append(5)
|
|
except FloatingPointError:
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
@jump_test(5, 6, [4, 6, 7])
|
|
def test_jump_within_except_block(output):
|
|
try:
|
|
1/0
|
|
except:
|
|
output.append(4)
|
|
output.append(5)
|
|
output.append(6)
|
|
output.append(7)
|
|
|
|
@jump_test(2, 4, [1, 4, 5, -4])
|
|
def test_jump_across_with(output):
|
|
output.append(1)
|
|
with tracecontext(output, 2):
|
|
output.append(3)
|
|
with tracecontext(output, 4):
|
|
output.append(5)
|
|
|
|
@async_jump_test(2, 4, [1, 4, 5, -4])
|
|
async def test_jump_across_async_with(output):
|
|
output.append(1)
|
|
async with asynctracecontext(output, 2):
|
|
output.append(3)
|
|
async with asynctracecontext(output, 4):
|
|
output.append(5)
|
|
|
|
@jump_test(4, 5, [1, 3, 5, 6])
|
|
def test_jump_out_of_with_block_within_for_block(output):
|
|
output.append(1)
|
|
for i in [1]:
|
|
with tracecontext(output, 3):
|
|
output.append(4)
|
|
output.append(5)
|
|
output.append(6)
|
|
|
|
@async_jump_test(4, 5, [1, 3, 5, 6])
|
|
async def test_jump_out_of_async_with_block_within_for_block(output):
|
|
output.append(1)
|
|
for i in [1]:
|
|
async with asynctracecontext(output, 3):
|
|
output.append(4)
|
|
output.append(5)
|
|
output.append(6)
|
|
|
|
@jump_test(4, 5, [1, 2, 3, 5, -2, 6])
|
|
def test_jump_out_of_with_block_within_with_block(output):
|
|
output.append(1)
|
|
with tracecontext(output, 2):
|
|
with tracecontext(output, 3):
|
|
output.append(4)
|
|
output.append(5)
|
|
output.append(6)
|
|
|
|
@async_jump_test(4, 5, [1, 2, 3, 5, -2, 6])
|
|
async def test_jump_out_of_async_with_block_within_with_block(output):
|
|
output.append(1)
|
|
with tracecontext(output, 2):
|
|
async with asynctracecontext(output, 3):
|
|
output.append(4)
|
|
output.append(5)
|
|
output.append(6)
|
|
|
|
@jump_test(5, 6, [2, 4, 6, 7])
|
|
def test_jump_out_of_with_block_within_finally_block(output):
|
|
try:
|
|
output.append(2)
|
|
finally:
|
|
with tracecontext(output, 4):
|
|
output.append(5)
|
|
output.append(6)
|
|
output.append(7)
|
|
|
|
@async_jump_test(5, 6, [2, 4, 6, 7])
|
|
async def test_jump_out_of_async_with_block_within_finally_block(output):
|
|
try:
|
|
output.append(2)
|
|
finally:
|
|
async with asynctracecontext(output, 4):
|
|
output.append(5)
|
|
output.append(6)
|
|
output.append(7)
|
|
|
|
@jump_test(8, 11, [1, 3, 5, 11, 12])
|
|
def test_jump_out_of_complex_nested_blocks(output):
|
|
output.append(1)
|
|
for i in [1]:
|
|
output.append(3)
|
|
for j in [1, 2]:
|
|
output.append(5)
|
|
try:
|
|
for k in [1, 2]:
|
|
output.append(8)
|
|
finally:
|
|
output.append(10)
|
|
output.append(11)
|
|
output.append(12)
|
|
|
|
@jump_test(3, 5, [1, 2, 5])
|
|
def test_jump_out_of_with_assignment(output):
|
|
output.append(1)
|
|
with tracecontext(output, 2) \
|
|
as x:
|
|
output.append(4)
|
|
output.append(5)
|
|
|
|
@async_jump_test(3, 5, [1, 2, 5])
|
|
async def test_jump_out_of_async_with_assignment(output):
|
|
output.append(1)
|
|
async with asynctracecontext(output, 2) \
|
|
as x:
|
|
output.append(4)
|
|
output.append(5)
|
|
|
|
@jump_test(3, 6, [1, 6, 8, 9])
|
|
def test_jump_over_return_in_try_finally_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
if not output: # always false
|
|
return
|
|
output.append(6)
|
|
finally:
|
|
output.append(8)
|
|
output.append(9)
|
|
|
|
@jump_test(5, 8, [1, 3, 8, 10, 11, 13])
|
|
def test_jump_over_break_in_try_finally_block(output):
|
|
output.append(1)
|
|
while True:
|
|
output.append(3)
|
|
try:
|
|
output.append(5)
|
|
if not output: # always false
|
|
break
|
|
output.append(8)
|
|
finally:
|
|
output.append(10)
|
|
output.append(11)
|
|
break
|
|
output.append(13)
|
|
|
|
@jump_test(1, 7, [7, 8])
|
|
def test_jump_over_for_block_before_else(output):
|
|
output.append(1)
|
|
if not output: # always false
|
|
for i in [3]:
|
|
output.append(4)
|
|
else:
|
|
output.append(6)
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
@async_jump_test(1, 7, [7, 8])
|
|
async def test_jump_over_async_for_block_before_else(output):
|
|
output.append(1)
|
|
if not output: # always false
|
|
async for i in asynciter([3]):
|
|
output.append(4)
|
|
else:
|
|
output.append(6)
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
# The second set of 'jump' tests are for things that are not allowed:
|
|
|
|
@jump_test(2, 3, [1], (ValueError, 'after'))
|
|
def test_no_jump_too_far_forwards(output):
|
|
output.append(1)
|
|
output.append(2)
|
|
|
|
@jump_test(2, -2, [1], (ValueError, 'before'))
|
|
def test_no_jump_too_far_backwards(output):
|
|
output.append(1)
|
|
output.append(2)
|
|
|
|
# Test each kind of 'except' line.
|
|
@jump_test(2, 3, [4], (ValueError, 'except'))
|
|
def test_no_jump_to_except_1(output):
|
|
try:
|
|
output.append(2)
|
|
except:
|
|
output.append(4)
|
|
raise
|
|
|
|
@jump_test(2, 3, [4], (ValueError, 'except'))
|
|
def test_no_jump_to_except_2(output):
|
|
try:
|
|
output.append(2)
|
|
except ValueError:
|
|
output.append(4)
|
|
raise
|
|
|
|
@jump_test(2, 3, [4], (ValueError, 'except'))
|
|
def test_no_jump_to_except_3(output):
|
|
try:
|
|
output.append(2)
|
|
except ValueError as e:
|
|
output.append(4)
|
|
raise e
|
|
|
|
@jump_test(2, 3, [4], (ValueError, 'except'))
|
|
def test_no_jump_to_except_4(output):
|
|
try:
|
|
output.append(2)
|
|
except (ValueError, RuntimeError) as e:
|
|
output.append(4)
|
|
raise e
|
|
|
|
@jump_test(1, 3, [], (ValueError, 'into'))
|
|
def test_no_jump_forwards_into_for_block(output):
|
|
output.append(1)
|
|
for i in 1, 2:
|
|
output.append(3)
|
|
|
|
@async_jump_test(1, 3, [], (ValueError, 'into'))
|
|
async def test_no_jump_forwards_into_async_for_block(output):
|
|
output.append(1)
|
|
async for i in asynciter([1, 2]):
|
|
output.append(3)
|
|
pass
|
|
|
|
@jump_test(3, 2, [2, 2], (ValueError, 'into'))
|
|
def test_no_jump_backwards_into_for_block(output):
|
|
for i in 1, 2:
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
@async_jump_test(3, 2, [2, 2], (ValueError, 'into'))
|
|
async def test_no_jump_backwards_into_async_for_block(output):
|
|
async for i in asynciter([1, 2]):
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
@jump_test(1, 3, [], (ValueError, 'into'))
|
|
def test_no_jump_forwards_into_with_block(output):
|
|
output.append(1)
|
|
with tracecontext(output, 2):
|
|
output.append(3)
|
|
|
|
@async_jump_test(1, 3, [], (ValueError, 'into'))
|
|
async def test_no_jump_forwards_into_async_with_block(output):
|
|
output.append(1)
|
|
async with asynctracecontext(output, 2):
|
|
output.append(3)
|
|
|
|
@jump_test(3, 2, [1, 2, -1], (ValueError, 'into'))
|
|
def test_no_jump_backwards_into_with_block(output):
|
|
with tracecontext(output, 1):
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
@async_jump_test(3, 2, [1, 2, -1], (ValueError, 'into'))
|
|
async def test_no_jump_backwards_into_async_with_block(output):
|
|
async with asynctracecontext(output, 1):
|
|
output.append(2)
|
|
output.append(3)
|
|
|
|
@jump_test(1, 3, [], (ValueError, 'into'))
|
|
def test_no_jump_forwards_into_try_finally_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
finally:
|
|
output.append(5)
|
|
|
|
@jump_test(5, 2, [2, 4], (ValueError, 'into'))
|
|
def test_no_jump_backwards_into_try_finally_block(output):
|
|
try:
|
|
output.append(2)
|
|
finally:
|
|
output.append(4)
|
|
output.append(5)
|
|
|
|
@jump_test(1, 3, [], (ValueError, 'into'))
|
|
def test_no_jump_forwards_into_try_except_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
except:
|
|
output.append(5)
|
|
raise
|
|
|
|
@jump_test(6, 2, [2], (ValueError, 'into'))
|
|
def test_no_jump_backwards_into_try_except_block(output):
|
|
try:
|
|
output.append(2)
|
|
except:
|
|
output.append(4)
|
|
raise
|
|
output.append(6)
|
|
|
|
# 'except' with a variable creates an implicit finally block
|
|
@jump_test(5, 7, [4], (ValueError, 'into'))
|
|
def test_no_jump_between_except_blocks_2(output):
|
|
try:
|
|
1/0
|
|
except ZeroDivisionError:
|
|
output.append(4)
|
|
output.append(5)
|
|
except FloatingPointError as e:
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
@jump_test(1, 5, [5])
|
|
def test_jump_into_finally_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
finally:
|
|
output.append(5)
|
|
|
|
@jump_test(3, 6, [2, 6, 7])
|
|
def test_jump_into_finally_block_from_try_block(output):
|
|
try:
|
|
output.append(2)
|
|
output.append(3)
|
|
finally: # still executed if the jump is failed
|
|
output.append(5)
|
|
output.append(6)
|
|
output.append(7)
|
|
|
|
@jump_test(5, 1, [1, 3, 1, 3, 5])
|
|
def test_jump_out_of_finally_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
finally:
|
|
output.append(5)
|
|
|
|
@jump_test(1, 5, [], (ValueError, "into an 'except'"))
|
|
def test_no_jump_into_bare_except_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
except:
|
|
output.append(5)
|
|
|
|
@jump_test(1, 5, [], (ValueError, "into an 'except'"))
|
|
def test_no_jump_into_qualified_except_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
except Exception:
|
|
output.append(5)
|
|
|
|
@jump_test(3, 6, [2, 5, 6], (ValueError, "into an 'except'"))
|
|
def test_no_jump_into_bare_except_block_from_try_block(output):
|
|
try:
|
|
output.append(2)
|
|
output.append(3)
|
|
except: # executed if the jump is failed
|
|
output.append(5)
|
|
output.append(6)
|
|
raise
|
|
output.append(8)
|
|
|
|
@jump_test(3, 6, [2], (ValueError, "into an 'except'"))
|
|
def test_no_jump_into_qualified_except_block_from_try_block(output):
|
|
try:
|
|
output.append(2)
|
|
output.append(3)
|
|
except ZeroDivisionError:
|
|
output.append(5)
|
|
output.append(6)
|
|
raise
|
|
output.append(8)
|
|
|
|
@jump_test(7, 1, [1, 3, 6], (ValueError, "out of an 'except'"))
|
|
def test_no_jump_out_of_bare_except_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
1/0
|
|
except:
|
|
output.append(6)
|
|
output.append(7)
|
|
|
|
@jump_test(7, 1, [1, 3, 6], (ValueError, "out of an 'except'"))
|
|
def test_no_jump_out_of_qualified_except_block(output):
|
|
output.append(1)
|
|
try:
|
|
output.append(3)
|
|
1/0
|
|
except Exception:
|
|
output.append(6)
|
|
output.append(7)
|
|
|
|
@jump_test(3, 5, [1, 2, 5, -2])
|
|
def test_jump_between_with_blocks(output):
|
|
output.append(1)
|
|
with tracecontext(output, 2):
|
|
output.append(3)
|
|
with tracecontext(output, 4):
|
|
output.append(5)
|
|
|
|
@async_jump_test(3, 5, [1, 2, 5, -2])
|
|
async def test_jump_between_async_with_blocks(output):
|
|
output.append(1)
|
|
async with asynctracecontext(output, 2):
|
|
output.append(3)
|
|
async with asynctracecontext(output, 4):
|
|
output.append(5)
|
|
|
|
@jump_test(5, 7, [2, 4], (ValueError, "after"))
|
|
def test_no_jump_over_return_out_of_finally_block(output):
|
|
try:
|
|
output.append(2)
|
|
finally:
|
|
output.append(4)
|
|
output.append(5)
|
|
return
|
|
output.append(7)
|
|
|
|
@jump_test(7, 4, [1, 6], (ValueError, 'into'))
|
|
def test_no_jump_into_for_block_before_else(output):
|
|
output.append(1)
|
|
if not output: # always false
|
|
for i in [3]:
|
|
output.append(4)
|
|
else:
|
|
output.append(6)
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
@async_jump_test(7, 4, [1, 6], (ValueError, 'into'))
|
|
async def test_no_jump_into_async_for_block_before_else(output):
|
|
output.append(1)
|
|
if not output: # always false
|
|
async for i in asynciter([3]):
|
|
output.append(4)
|
|
else:
|
|
output.append(6)
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
def test_no_jump_to_non_integers(self):
|
|
self.run_test(no_jump_to_non_integers, 2, "Spam", [True])
|
|
|
|
def test_no_jump_without_trace_function(self):
|
|
# Must set sys.settrace(None) in setUp(), else condition is not
|
|
# triggered.
|
|
no_jump_without_trace_function()
|
|
|
|
def test_large_function(self):
|
|
d = {}
|
|
exec("""def f(output): # line 0
|
|
x = 0 # line 1
|
|
y = 1 # line 2
|
|
''' # line 3
|
|
%s # lines 4-1004
|
|
''' # line 1005
|
|
x += 1 # line 1006
|
|
output.append(x) # line 1007
|
|
return""" % ('\n' * 1000,), d)
|
|
f = d['f']
|
|
self.run_test(f, 2, 1007, [0])
|
|
|
|
def test_jump_to_firstlineno(self):
|
|
# This tests that PDB can jump back to the first line in a
|
|
# file. See issue #1689458. It can only be triggered in a
|
|
# function call if the function is defined on a single line.
|
|
code = compile("""
|
|
# Comments don't count.
|
|
output.append(2) # firstlineno is here.
|
|
output.append(3)
|
|
output.append(4)
|
|
""", "<fake module>", "exec")
|
|
class fake_function:
|
|
__code__ = code
|
|
tracer = JumpTracer(fake_function, 4, 1)
|
|
sys.settrace(tracer.trace)
|
|
namespace = {"output": []}
|
|
exec(code, namespace)
|
|
sys.settrace(None)
|
|
self.compare_jump_output([2, 3, 2, 3, 4], namespace["output"])
|
|
|
|
@jump_test(2, 3, [1], event='call', error=(ValueError, "can't jump from"
|
|
" the 'call' trace event of a new frame"))
|
|
def test_no_jump_from_call(output):
|
|
output.append(1)
|
|
def nested():
|
|
output.append(3)
|
|
nested()
|
|
output.append(5)
|
|
|
|
@jump_test(2, 1, [1], event='return', error=(ValueError,
|
|
"can only jump from a 'line' trace event"))
|
|
def test_no_jump_from_return_event(output):
|
|
output.append(1)
|
|
return
|
|
|
|
@jump_test(2, 1, [1], event='exception', error=(ValueError,
|
|
"can only jump from a 'line' trace event"))
|
|
def test_no_jump_from_exception_event(output):
|
|
output.append(1)
|
|
1 / 0
|
|
|
|
@jump_test(3, 2, [2, 5], event='return')
|
|
def test_jump_from_yield(output):
|
|
def gen():
|
|
output.append(2)
|
|
yield 3
|
|
next(gen())
|
|
output.append(5)
|
|
|
|
@jump_test(2, 3, [1, 3])
|
|
def test_jump_forward_over_listcomp(output):
|
|
output.append(1)
|
|
x = [i for i in range(10)]
|
|
output.append(3)
|
|
|
|
# checking for segfaults.
|
|
# See https://github.com/python/cpython/issues/92311
|
|
@jump_test(3, 1, [])
|
|
def test_jump_backward_over_listcomp(output):
|
|
a = 1
|
|
x = [i for i in range(10)]
|
|
c = 3
|
|
|
|
@jump_test(8, 2, [2, 7, 2])
|
|
def test_jump_backward_over_listcomp_v2(output):
|
|
flag = False
|
|
output.append(2)
|
|
if flag:
|
|
return
|
|
x = [i for i in range(5)]
|
|
flag = 6
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
@async_jump_test(2, 3, [1, 3])
|
|
async def test_jump_forward_over_async_listcomp(output):
|
|
output.append(1)
|
|
x = [i async for i in asynciter(range(10))]
|
|
output.append(3)
|
|
|
|
@async_jump_test(3, 1, [])
|
|
async def test_jump_backward_over_async_listcomp(output):
|
|
a = 1
|
|
x = [i async for i in asynciter(range(10))]
|
|
c = 3
|
|
|
|
@async_jump_test(8, 2, [2, 7, 2])
|
|
async def test_jump_backward_over_async_listcomp_v2(output):
|
|
flag = False
|
|
output.append(2)
|
|
if flag:
|
|
return
|
|
x = [i async for i in asynciter(range(5))]
|
|
flag = 6
|
|
output.append(7)
|
|
output.append(8)
|
|
|
|
|
|
class TestEdgeCases(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.addCleanup(sys.settrace, sys.gettrace())
|
|
sys.settrace(None)
|
|
|
|
def test_reentrancy(self):
|
|
def foo(*args):
|
|
...
|
|
|
|
def bar(*args):
|
|
...
|
|
|
|
class A:
|
|
def __call__(self, *args):
|
|
pass
|
|
|
|
def __del__(self):
|
|
sys.settrace(bar)
|
|
|
|
sys.settrace(A())
|
|
with support.catch_unraisable_exception() as cm:
|
|
sys.settrace(foo)
|
|
self.assertEqual(cm.unraisable.object, A.__del__)
|
|
self.assertIsInstance(cm.unraisable.exc_value, RuntimeError)
|
|
|
|
self.assertEqual(sys.gettrace(), foo)
|
|
|
|
|
|
def test_same_object(self):
|
|
def foo(*args):
|
|
...
|
|
|
|
sys.settrace(foo)
|
|
del foo
|
|
sys.settrace(sys.gettrace())
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|