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gh-132912: Account for race in test_keyboard_interrupt in test_remote_pdb#132929

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pablogsal merged 2 commits intopython:mainfrompablogsal:gh-132912
Apr 25, 2025

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@pablogsalpablogsal commentedApr 25, 2025•
edited by bedevere-appbot
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@pablogsal
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There was a very rare race here as the test can be interrupted just when we are leaving the socket synchronization function before we go back to the main function

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Tested locally as@vstinner did and couldn't find anything for 2000 iterations:

OK0:02:08 load avg: 38.40 [2021] test_remote_pdb passedtest_breakpoints (test.test_remote_pdb.PdbConnectTestCase.test_breakpoints)Test setting and hitting breakpoints. ... oktest_connect_and_basic_commands (test.test_remote_pdb.PdbConnectTestCase.test_connect_and_basic_commands)Test connecting to a remote debugger and sending basic commands. ... oktest_handle_eof (test.test_remote_pdb.PdbConnectTestCase.test_handle_eof)Test that EOF signal properly exits the debugger. ... oktest_help_system (test.test_remote_pdb.PdbConnectTestCase.test_help_system)Test that the help system properly sends help text to the client. ... oktest_keyboard_interrupt (test.test_remote_pdb.PdbConnectTestCase.test_keyboard_interrupt)Test that sending keyboard interrupt breaks into pdb. ... oktest_multi_line_commands (test.test_remote_pdb.PdbConnectTestCase.test_multi_line_commands)Test that multi-line commands work properly over remote connection. ... oktest_protocol_version (test.test_remote_pdb.PdbConnectTestCase.test_protocol_version)Test that incompatible protocol versions are properly detected. ... oktest_cmdloop (test.test_remote_pdb.RemotePdbTestCase.test_cmdloop)Test the command loop with various commands. ... oktest_completion (test.test_remote_pdb.RemotePdbTestCase.test_completion)Test handling completion requests. ... oktest_detach (test.test_remote_pdb.RemotePdbTestCase.test_detach)Test the detach method. ... oktest_do_help (test.test_remote_pdb.RemotePdbTestCase.test_do_help)Test that do_help sends the help message. ... oktest_interact_mode (test.test_remote_pdb.RemotePdbTestCase.test_interact_mode)Test interaction mode setup and execution. ... testoktest_message_and_error (test.test_remote_pdb.RemotePdbTestCase.test_message_and_error)Test message and error methods send correct JSON. ... oktest_read_command (test.test_remote_pdb.RemotePdbTestCase.test_read_command)Test reading commands from the socket. ... oktest_read_command_EOF (test.test_remote_pdb.RemotePdbTestCase.test_read_command_EOF)Test reading EOF command. ... oktest_registering_commands (test.test_remote_pdb.RemotePdbTestCase.test_registering_commands)Test registering breakpoint commands. ... ok----------------------------------------------------------------------Ran 16 tests in 4.128s

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CC@godlygeek

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Somehow related: test_remote_pdb can still fail on a heavy loaded machine because of its hardcoded timeout of 5 seconds. I wrote#132939 to fix this issue.

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LGTM. I cannot make it fail, it looks way more reliable.

I tested on a Linux laptop with 12 logical CPUs:

  • 4 terminals running:./python -m test test_remote_pdb -m test_keyboard_interrupt -v --timeout=15 --forever
  • 1 terminal running:./python -m test test_remote_pdb -m test_keyboard_interrupt -W --timeout=60 --forever -j150

I ran my test for 5 minutes. The system load was around 162.

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Fantastic. Thanks for the help@vstinner!

@pablogsalpablogsal merged commit6cbeb6a intopython:mainApr 25, 2025
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@pablogsalpablogsal deleted the gh-132912 branchApril 25, 2025 13:46
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@vstinnervstinnervstinner approved these changes

@gaogaotiantiangaogaotiantianAwaiting requested review from gaogaotiantiangaogaotiantian is a code owner

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