New submission from STINNER Victor: The test_child_terminated_in_stopped_state() test creates a child process which calls ptrace(PTRACE_ME, 0, 0) and then crashs using SIGSEGV. The problem is that even if we read the exit status using os.waitpid() through subprocess, the process remains alive in the "t (tracing stop)" state.
I would prefer to not use ptrace() is an unit test since this API is very low-level and it's hard to use it correctly. I suggest to either remove the functional test, or to rewrite it as an unit test using mocks to test bpo-29335 without ptrace(). haypo@selma$ ./python -m test -m test_child_terminated_in_stopped_state -F test_subprocess Run tests sequentially 0:00:00 load avg: 0.95 [ 1] test_subprocess 0:00:00 load avg: 0.95 [ 2] test_subprocess 0:00:01 load avg: 0.96 [ 3] test_subprocess 0:00:01 load avg: 0.96 [ 4] test_subprocess 0:00:02 load avg: 0.96 [ 5] test_subprocess 0:00:03 load avg: 0.96 [ 6] test_subprocess 0:00:03 load avg: 0.96 [ 7] test_subprocess 0:00:04 load avg: 0.96 [ 8] test_subprocess 0:00:05 load avg: 0.96 [ 9] test_subprocess 0:00:05 load avg: 0.96 [ 10] test_subprocess ^Z [1]+ Stoppé ./python -m test -m test_child_terminated_in_stopped_state -F test_subprocess haypo@selma$ ps PID TTY TIME CMD 30359 pts/0 00:00:00 bash 31882 pts/0 00:00:00 python 31885 pts/0 00:00:00 python 31888 pts/0 00:00:00 python 31892 pts/0 00:00:00 python 31895 pts/0 00:00:00 python 31898 pts/0 00:00:00 python 31901 pts/0 00:00:00 python 31904 pts/0 00:00:00 python 31907 pts/0 00:00:00 python 31910 pts/0 00:00:00 python 31912 pts/0 00:00:00 python 31920 pts/0 00:00:00 ps haypo@selma$ grep Stat /proc/31885/status State: t (tracing stop) ---------- messages: 300066 nosy: haypo priority: normal severity: normal status: open title: test_subprocess: test_child_terminated_in_stopped_state() leaks a zombie process _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue31173> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
