New submission from tongxiaoge <shixuant...@huawei.com>:
Reproduction steps: 1. Execute command: iotop -b -n 10 & 2. Execute the command in another session: valgrind /usr/sbin/iotop -b -n 5 > iotop_test The output information is as follows: [root@openEuler ~]# valgrind /usr/sbin/iotop -b -n 5 > iotop_test ==13750== Memcheck, a memory error detector ==13750== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==13750== Using Valgrind-3.16.0 and LibVEX; rerun with -h for copyright info ==13750== Command: /usr/sbin/iotop -b -n 5 ==13750== ==13750== Conditional jump or move depends on uninitialised value(s) ==13750== at 0x49B2C40: PyUnicode_Decode (unicodeobject.c:3488) ==13750== by 0x49B335B: unicode_new (unicodeobject.c:15465) ==13750== by 0x4982C07: type_call (typeobject.c:1014) ==13750== by 0x492CA17: _PyObject_MakeTpCall (call.c:191) ==13750== by 0x48F1863: _PyObject_VectorcallTstate (abstract.h:116) ==13750== by 0x48F1863: _PyObject_VectorcallTstate (abstract.h:103) ==13750== by 0x48F1863: PyObject_Vectorcall (abstract.h:127) ==13750== by 0x48F1863: call_function (ceval.c:5075) ==13750== by 0x48F1863: _PyEval_EvalFrameDefault (ceval.c:3518) ==13750== by 0x48EAEE7: _PyEval_EvalFrame (pycore_ceval.h:40) ==13750== by 0x48EAEE7: function_code_fastcall (call.c:330) ==13750== by 0x492CBE7: _PyObject_FastCallDictTstate (call.c:118) ==13750== by 0x492CEEB: _PyObject_Call_Prepend (call.c:489) ==13750== by 0x498A007: slot_tp_init (typeobject.c:6964) ==13750== by 0x4982C4F: type_call (typeobject.c:1026) ==13750== by 0x492CA17: _PyObject_MakeTpCall (call.c:191) ==13750== by 0x48F1863: _PyObject_VectorcallTstate (abstract.h:116) ==13750== by 0x48F1863: _PyObject_VectorcallTstate (abstract.h:103) ==13750== by 0x48F1863: PyObject_Vectorcall (abstract.h:127) ==13750== by 0x48F1863: call_function (ceval.c:5075) ==13750== by 0x48F1863: _PyEval_EvalFrameDefault (ceval.c:3518) ==13750== ==13751== Warning: invalid file descriptor 1024 in syscall close() ==13751== Warning: invalid file descriptor 1025 in syscall close() ==13751== Warning: invalid file descriptor 1026 in syscall close() ==13751== Warning: invalid file descriptor 1027 in syscall close() ==13751== Use --log-fd= to select an alternative log fd. ==13751== Warning: invalid file descriptor 1028 in syscall close() ==13751== Warning: invalid file descriptor 1029 in syscall close() ==13752== Warning: invalid file descriptor 1024 in syscall close() ==13752== Warning: invalid file descriptor 1025 in syscall close() ==13752== Warning: invalid file descriptor 1026 in syscall close() ==13752== Warning: invalid file descriptor 1027 in syscall close() ==13752== Use --log-fd= to select an alternative log fd. ==13752== Warning: invalid file descriptor 1028 in syscall close() ==13752== Warning: invalid file descriptor 1029 in syscall close() ==13750== ==13750== HEAP SUMMARY: ==13750== in use at exit: 1,069,715 bytes in 10,017 blocks ==13750== total heap usage: 589,638 allocs, 579,621 frees, 128,672,782 bytes allocated ==13750== ==13750== LEAK SUMMARY: ==13750== definitely lost: 0 bytes in 0 blocks ==13750== indirectly lost: 0 bytes in 0 blocks ==13750== possibly lost: 1,042,483 bytes in 9,894 blocks ==13750== still reachable: 27,232 bytes in 123 blocks ==13750== suppressed: 0 bytes in 0 blocks ==13750== Rerun with --leak-check=full to see details of leaked memory ==13750== ==13750== Use --track-origins=yes to see where uninitialised values come from ==13750== For lists of detected and suppressed errors, rerun with: -s ==13750== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0) Software version: python3-3.9.9 & python3.9.10 iotop-6.0 The above stack information is in Python 3.9.10 and this problem cannot be reproduced in Python 3.7. So is it a python3 problem or an iotop problem? How to fix it. ---------- messages: 413912 nosy: sxt1001 priority: normal severity: normal status: open title: Memory problems detected using Valgrind type: resource usage versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue46849> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com