779 lines
20 KiB
Python
779 lines
20 KiB
Python
"""
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That "native" debug mode better work!
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All these tests can be understood (somewhat) by running the equivalent
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`examples/debugging/` scripts manually.
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TODO:
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- none of these tests have been run successfully on windows yet but
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there's been manual testing that verified it works.
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- wonder if any of it'll work on OS X?
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"""
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import time
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from os import path
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import platform
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from typing import Optional
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import pytest
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import pexpect
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from conftest import repodir
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# TODO: The next great debugger audit could be done by you!
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# - recurrent entry to breakpoint() from single actor *after* and an
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# error in another task?
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# - root error before child errors
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# - root error after child errors
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# - root error before child breakpoint
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# - root error after child breakpoint
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# - recurrent root errors
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if platform.system() == 'Windows':
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pytest.skip(
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'Debugger tests have no windows support (yet)',
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allow_module_level=True,
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)
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def examples_dir():
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"""Return the abspath to the examples directory.
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"""
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return path.join(repodir(), 'examples', 'debugging/')
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def mk_cmd(ex_name: str) -> str:
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"""Generate a command suitable to pass to ``pexpect.spawn()``.
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"""
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return ' '.join(
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['python',
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path.join(examples_dir(), f'{ex_name}.py')]
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)
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@pytest.fixture
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def spawn(
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start_method,
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testdir,
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arb_addr,
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) -> 'pexpect.spawn':
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if start_method != 'trio':
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pytest.skip(
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"Debugger tests are only supported on the trio backend"
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)
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def _spawn(cmd):
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return testdir.spawn(
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cmd=mk_cmd(cmd),
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expect_timeout=3,
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)
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return _spawn
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def assert_before(
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child,
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patts: list[str],
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) -> None:
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before = str(child.before.decode())
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for patt in patts:
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try:
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assert patt in before
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except AssertionError:
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print(before)
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raise
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@pytest.fixture(
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params=[False, True],
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ids='ctl-c={}'.format,
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)
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def ctlc(request) -> bool:
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yield request.param
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@pytest.mark.parametrize(
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'user_in_out',
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[
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('c', 'AssertionError'),
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('q', 'AssertionError'),
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],
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ids=lambda item: f'{item[0]} -> {item[1]}',
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)
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def test_root_actor_error(spawn, user_in_out):
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"""Demonstrate crash handler entering pdbpp from basic error in root actor.
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"""
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user_input, expect_err_str = user_in_out
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child = spawn('root_actor_error')
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# scan for the pdbpp prompt
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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# make sure expected logging and error arrives
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assert "Attaching to pdb in crashed actor: ('root'" in before
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assert 'AssertionError' in before
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# send user command
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child.sendline(user_input)
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# process should exit
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child.expect(pexpect.EOF)
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assert expect_err_str in str(child.before)
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@pytest.mark.parametrize(
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'user_in_out',
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[
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('c', None),
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('q', 'bdb.BdbQuit'),
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],
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ids=lambda item: f'{item[0]} -> {item[1]}',
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)
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def test_root_actor_bp(spawn, user_in_out):
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"""Demonstrate breakpoint from in root actor.
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"""
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user_input, expect_err_str = user_in_out
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child = spawn('root_actor_breakpoint')
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# scan for the pdbpp prompt
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child.expect(r"\(Pdb\+\+\)")
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assert 'Error' not in str(child.before)
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# send user command
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child.sendline(user_input)
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child.expect('\r\n')
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# process should exit
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child.expect(pexpect.EOF)
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if expect_err_str is None:
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assert 'Error' not in str(child.before)
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else:
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assert expect_err_str in str(child.before)
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def do_ctlc(
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child,
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count: int = 3,
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delay: float = 0.1,
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patt: Optional[str] = None,
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# XXX: literally no idea why this is an issue in CI but likely will
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# flush out (hopefully) with proper 3.10 release of `pdbpp`...
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expect_prompt: bool = False,
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) -> None:
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# make sure ctl-c sends don't do anything but repeat output
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for _ in range(count):
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time.sleep(delay)
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child.sendcontrol('c')
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# before = str(child.before.decode())
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# TODO: figure out why this makes CI fail..
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# if you run this test manually it works just fine..
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from conftest import _ci_env
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if expect_prompt and not _ci_env:
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time.sleep(delay)
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child.expect(r"\(Pdb\+\+\)")
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time.sleep(delay)
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if patt:
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# should see the last line on console
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assert patt in before
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def test_root_actor_bp_forever(
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spawn,
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ctlc: bool,
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):
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"Re-enter a breakpoint from the root actor-task."
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child = spawn('root_actor_breakpoint_forever')
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# do some "next" commands to demonstrate recurrent breakpoint
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# entries
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for _ in range(10):
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child.expect(r"\(Pdb\+\+\)")
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if ctlc:
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do_ctlc(child)
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child.sendline('next')
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# do one continue which should trigger a
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# new task to lock the tty
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child.sendline('continue')
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child.expect(r"\(Pdb\+\+\)")
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# seems that if we hit ctrl-c too fast the
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# sigint guard machinery might not kick in..
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time.sleep(0.001)
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if ctlc:
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do_ctlc(child)
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# XXX: this previously caused a bug!
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child.sendline('n')
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child.expect(r"\(Pdb\+\+\)")
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child.sendline('n')
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child.expect(r"\(Pdb\+\+\)")
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# quit out of the loop
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child.sendline('q')
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child.expect(pexpect.EOF)
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def test_subactor_error(
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spawn,
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ctlc: bool,
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):
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"Single subactor raising an error"
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child = spawn('subactor_error')
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# scan for the pdbpp prompt
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "Attaching to pdb in crashed actor: ('name_error'" in before
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# make sure ctl-c sends don't do anything but repeat output
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if ctlc:
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do_ctlc(
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child,
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)
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child.expect(r"\(Pdb\+\+\)")
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# send user command and (in this case it's the same for 'continue'
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# vs. 'quit') the debugger should enter a second time in the nursery
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# creating actor
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child.sendline('continue')
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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# root actor gets debugger engaged
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assert "Attaching to pdb in crashed actor: ('root'" in before
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# error is a remote error propagated from the subactor
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assert "RemoteActorError: ('name_error'" in before
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# another round
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if ctlc:
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do_ctlc(child)
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child.sendline('c')
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child.expect('\r\n')
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# process should exit
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child.expect(pexpect.EOF)
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def test_subactor_breakpoint(
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spawn,
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ctlc: bool,
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):
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"Single subactor with an infinite breakpoint loop"
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child = spawn('subactor_breakpoint')
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# scan for the pdbpp prompt
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "Attaching pdb to actor: ('breakpoint_forever'" in before
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# do some "next" commands to demonstrate recurrent breakpoint
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# entries
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for _ in range(10):
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child.sendline('next')
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child.expect(r"\(Pdb\+\+\)")
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if ctlc:
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do_ctlc(child)
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# now run some "continues" to show re-entries
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for _ in range(5):
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child.sendline('continue')
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "Attaching pdb to actor: ('breakpoint_forever'" in before
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if ctlc:
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do_ctlc(child)
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# finally quit the loop
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child.sendline('q')
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# child process should exit but parent will capture pdb.BdbQuit
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "RemoteActorError: ('breakpoint_forever'" in before
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assert 'bdb.BdbQuit' in before
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if ctlc:
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do_ctlc(child)
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# quit the parent
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child.sendline('c')
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# process should exit
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child.expect(pexpect.EOF)
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before = str(child.before.decode())
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assert "RemoteActorError: ('breakpoint_forever'" in before
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assert 'bdb.BdbQuit' in before
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def test_multi_subactors(
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spawn,
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ctlc: bool,
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):
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"""
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Multiple subactors, both erroring and breakpointing as well as
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a nested subactor erroring.
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"""
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child = spawn(r'multi_subactors')
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# scan for the pdbpp prompt
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "Attaching pdb to actor: ('breakpoint_forever'" in before
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if ctlc:
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do_ctlc(child)
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# do some "next" commands to demonstrate recurrent breakpoint
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# entries
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for _ in range(10):
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child.sendline('next')
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child.expect(r"\(Pdb\+\+\)")
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if ctlc:
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do_ctlc(child)
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# continue to next error
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child.sendline('c')
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# first name_error failure
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "Attaching to pdb in crashed actor: ('name_error'" in before
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assert "NameError" in before
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if ctlc:
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do_ctlc(child)
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# continue again
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child.sendline('c')
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# 2nd name_error failure
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child.expect(r"\(Pdb\+\+\)")
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assert_before(child, [
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"Attaching to pdb in crashed actor: ('name_error_1'",
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"NameError",
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])
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# before = str(child.before.decode())
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# assert "Attaching to pdb in crashed actor: ('name_error_1'" in before
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# assert "NameError" in before
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if ctlc:
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do_ctlc(child)
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# breakpoint loop should re-engage
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child.sendline('c')
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "Attaching pdb to actor: ('breakpoint_forever'" in before
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if ctlc:
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do_ctlc(child)
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# wait for spawn error to show up
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spawn_err = "Attaching to pdb in crashed actor: ('spawn_error'"
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while spawn_err not in before:
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child.sendline('c')
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time.sleep(0.1)
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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if ctlc:
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do_ctlc(child)
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# 2nd depth nursery should trigger
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# child.sendline('c')
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# child.expect(r"\(Pdb\+\+\)")
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# before = str(child.before.decode())
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assert spawn_err in before
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assert "RemoteActorError: ('name_error_1'" in before
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# now run some "continues" to show re-entries
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for _ in range(5):
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child.sendline('c')
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child.expect(r"\(Pdb\+\+\)")
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# quit the loop and expect parent to attach
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child.sendline('q')
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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# debugger attaches to root
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assert "Attaching to pdb in crashed actor: ('root'" in before
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# expect a multierror with exceptions for each sub-actor
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assert "RemoteActorError: ('breakpoint_forever'" in before
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assert "RemoteActorError: ('name_error'" in before
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assert "RemoteActorError: ('spawn_error'" in before
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assert "RemoteActorError: ('name_error_1'" in before
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assert 'bdb.BdbQuit' in before
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if ctlc:
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do_ctlc(child)
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# process should exit
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child.sendline('c')
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child.expect(pexpect.EOF)
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# repeat of previous multierror for final output
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before = str(child.before.decode())
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assert "RemoteActorError: ('breakpoint_forever'" in before
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assert "RemoteActorError: ('name_error'" in before
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assert "RemoteActorError: ('spawn_error'" in before
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assert "RemoteActorError: ('name_error_1'" in before
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assert 'bdb.BdbQuit' in before
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def test_multi_daemon_subactors(
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spawn,
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loglevel: str,
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ctlc: bool
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):
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'''
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Multiple daemon subactors, both erroring and breakpointing within a
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stream.
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'''
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child = spawn('multi_daemon_subactors')
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child.expect(r"\(Pdb\+\+\)")
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# there is a race for which subactor will acquire
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# the root's tty lock first
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before = str(child.before.decode())
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bp_forever_msg = "Attaching pdb to actor: ('bp_forever'"
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name_error_msg = "NameError"
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if bp_forever_msg in before:
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next_msg = name_error_msg
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elif name_error_msg in before:
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next_msg = bp_forever_msg
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else:
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raise ValueError("Neither log msg was found !?")
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if ctlc:
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do_ctlc(child)
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# NOTE: previously since we did not have clobber prevention
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# in the root actor this final resume could result in the debugger
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# tearing down since both child actors would be cancelled and it was
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# unlikely that `bp_forever` would re-acquire the tty lock again.
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# Now, we should have a final resumption in the root plus a possible
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# second entry by `bp_forever`.
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child.sendline('c')
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert next_msg in before
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# XXX: hooray the root clobbering the child here was fixed!
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# IMO, this demonstrates the true power of SC system design.
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# now the root actor won't clobber the bp_forever child
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# during it's first access to the debug lock, but will instead
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# wait for the lock to release, by the edge triggered
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# ``_debug._no_remote_has_tty`` event before sending cancel messages
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# (via portals) to its underlings B)
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# at some point here there should have been some warning msg from
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# the root announcing it avoided a clobber of the child's lock, but
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# it seems unreliable in testing here to gnab it:
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# assert "in use by child ('bp_forever'," in before
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if ctlc:
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do_ctlc(child)
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# wait for final error in root
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while True:
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child.sendline('c')
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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try:
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# root error should be packed as remote error
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assert "_exceptions.RemoteActorError: ('name_error'" in before
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break
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except AssertionError:
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assert bp_forever_msg in before
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if ctlc:
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do_ctlc(child)
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try:
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child.sendline('c')
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child.expect(pexpect.EOF)
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except pexpect.exceptions.TIMEOUT:
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# Failed to exit using continue..?
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child.sendline('q')
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child.expect(pexpect.EOF)
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|
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def test_multi_subactors_root_errors(
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spawn,
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ctlc: bool
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):
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'''
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Multiple subactors, both erroring and breakpointing as well as
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a nested subactor erroring.
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'''
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child = spawn('multi_subactor_root_errors')
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# scan for the pdbpp prompt
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child.expect(r"\(Pdb\+\+\)")
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# at most one subactor should attach before the root is cancelled
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before = str(child.before.decode())
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assert "NameError: name 'doggypants' is not defined" in before
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if ctlc:
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do_ctlc(child)
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# continue again to catch 2nd name error from
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# actor 'name_error_1' (which is 2nd depth).
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child.sendline('c')
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child.expect(r"\(Pdb\+\+\)")
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before = str(child.before.decode())
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assert "Attaching to pdb in crashed actor: ('name_error_1'" in before
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assert "NameError" in before
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if ctlc:
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do_ctlc(child)
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
|
|
child.sendline('c')
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
before = str(child.before.decode())
|
|
assert "Attaching to pdb in crashed actor: ('spawn_error'" in before
|
|
# boxed error from previous step
|
|
assert "RemoteActorError: ('name_error_1'" in before
|
|
assert "NameError" in before
|
|
|
|
if ctlc:
|
|
do_ctlc(child)
|
|
|
|
child.sendline('c')
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
before = str(child.before.decode())
|
|
assert "Attaching to pdb in crashed actor: ('root'" in before
|
|
# boxed error from first level failure
|
|
assert "RemoteActorError: ('name_error'" in before
|
|
assert "NameError" in before
|
|
|
|
# warnings assert we probably don't need
|
|
# assert "Cancelling nursery in ('spawn_error'," in before
|
|
|
|
if ctlc:
|
|
do_ctlc(child)
|
|
|
|
# continue again
|
|
child.sendline('c')
|
|
child.expect(pexpect.EOF)
|
|
|
|
before = str(child.before.decode())
|
|
# error from root actor and root task that created top level nursery
|
|
assert "AssertionError" in before
|
|
|
|
|
|
def test_multi_nested_subactors_error_through_nurseries(
|
|
spawn,
|
|
|
|
# TODO: address debugger issue for nested tree:
|
|
# <issuelink>
|
|
# ctlc: bool,
|
|
):
|
|
"""Verify deeply nested actors that error trigger debugger entries
|
|
at each actor nurserly (level) all the way up the tree.
|
|
|
|
"""
|
|
# NOTE: previously, inside this script was a bug where if the
|
|
# parent errors before a 2-levels-lower actor has released the lock,
|
|
# the parent tries to cancel it but it's stuck in the debugger?
|
|
# A test (below) has now been added to explicitly verify this is
|
|
# fixed.
|
|
|
|
child = spawn('multi_nested_subactors_error_up_through_nurseries')
|
|
|
|
timed_out_early: bool = False
|
|
|
|
for i in range(12):
|
|
try:
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
child.sendline('c')
|
|
time.sleep(0.1)
|
|
|
|
except pexpect.exceptions.EOF:
|
|
|
|
# race conditions on how fast the continue is sent?
|
|
print(f"Failed early on {i}?")
|
|
timed_out_early = True
|
|
break
|
|
else:
|
|
child.expect(pexpect.EOF)
|
|
|
|
if not timed_out_early:
|
|
before = str(child.before.decode())
|
|
assert "NameError" in before
|
|
|
|
|
|
def test_root_nursery_cancels_before_child_releases_tty_lock(
|
|
spawn,
|
|
start_method,
|
|
ctlc: bool,
|
|
):
|
|
"""Test that when the root sends a cancel message before a nested
|
|
child has unblocked (which can happen when it has the tty lock and
|
|
is engaged in pdb) it is indeed cancelled after exiting the debugger.
|
|
"""
|
|
timed_out_early = False
|
|
|
|
child = spawn('root_cancelled_but_child_is_in_tty_lock')
|
|
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
|
|
before = str(child.before.decode())
|
|
assert "NameError: name 'doggypants' is not defined" in before
|
|
assert "tractor._exceptions.RemoteActorError: ('name_error'" not in before
|
|
time.sleep(0.5)
|
|
|
|
if ctlc:
|
|
do_ctlc(child)
|
|
|
|
child.sendline('c')
|
|
|
|
for i in range(4):
|
|
time.sleep(0.5)
|
|
try:
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
|
|
except (
|
|
pexpect.exceptions.EOF,
|
|
pexpect.exceptions.TIMEOUT,
|
|
):
|
|
# races all over..
|
|
|
|
print(f"Failed early on {i}?")
|
|
before = str(child.before.decode())
|
|
|
|
timed_out_early = True
|
|
|
|
# race conditions on how fast the continue is sent?
|
|
break
|
|
|
|
before = str(child.before.decode())
|
|
assert "NameError: name 'doggypants' is not defined" in before
|
|
|
|
if ctlc:
|
|
do_ctlc(child)
|
|
|
|
child.sendline('c')
|
|
|
|
while True:
|
|
try:
|
|
child.expect(pexpect.EOF)
|
|
break
|
|
except pexpect.exceptions.TIMEOUT:
|
|
child.sendline('c')
|
|
print('child was able to grab tty lock again?')
|
|
|
|
if not timed_out_early:
|
|
|
|
before = str(child.before.decode())
|
|
assert "tractor._exceptions.RemoteActorError: ('spawner0'" in before
|
|
assert "tractor._exceptions.RemoteActorError: ('name_error'" in before
|
|
assert "NameError: name 'doggypants' is not defined" in before
|
|
|
|
|
|
def test_root_cancels_child_context_during_startup(
|
|
spawn,
|
|
ctlc: bool,
|
|
):
|
|
'''Verify a fast fail in the root doesn't lock up the child reaping
|
|
and all while using the new context api.
|
|
|
|
'''
|
|
child = spawn('fast_error_in_root_after_spawn')
|
|
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
|
|
before = str(child.before.decode())
|
|
assert "AssertionError" in before
|
|
|
|
if ctlc:
|
|
do_ctlc(child)
|
|
|
|
child.sendline('c')
|
|
child.expect(pexpect.EOF)
|
|
|
|
|
|
def test_different_debug_mode_per_actor(
|
|
spawn,
|
|
ctlc: bool,
|
|
):
|
|
child = spawn('per_actor_debug')
|
|
child.expect(r"\(Pdb\+\+\)")
|
|
|
|
# only one actor should enter the debugger
|
|
before = str(child.before.decode())
|
|
assert "Attaching to pdb in crashed actor: ('debugged_boi'" in before
|
|
assert "RuntimeError" in before
|
|
|
|
if ctlc:
|
|
do_ctlc(child)
|
|
|
|
child.sendline('c')
|
|
child.expect(pexpect.EOF)
|
|
|
|
before = str(child.before.decode())
|
|
|
|
# NOTE: this debugged actor error currently WON'T show up since the
|
|
# root will actually cancel and terminate the nursery before the error
|
|
# msg reported back from the debug mode actor is processed.
|
|
# assert "tractor._exceptions.RemoteActorError: ('debugged_boi'" in before
|
|
|
|
assert "tractor._exceptions.RemoteActorError: ('crash_boi'" in before
|
|
|
|
# the crash boi should not have made a debugger request but
|
|
# instead crashed completely
|
|
assert "tractor._exceptions.RemoteActorError: ('crash_boi'" in before
|
|
assert "RuntimeError" in before
|