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gh-117657: Move static variables in fileutils.c to thread state #120559

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@Fidget-Spinner Fidget-Spinner commented Jun 15, 2024 •
edited by bedevere-app bot
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Example race reported by TSAN:

WARNING: ThreadSanitizer: data race (pid=18775)
  Read of size 4 at 0x555555e963f4 by thread T2:
    #0 set_inheritable /home/ken/Documents/GitHub/cpython/Python/fileutils.c:1505:9 (python+0x5f2ff3) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #1 _Py_set_inheritable /home/ken/Documents/GitHub/cpython/Python/fileutils.c:1605:12 (python+0x5f2efe) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #2 _io_FileIO___init___impl /home/ken/Documents/GitHub/cpython/./Modules/_io/fileio.c:447:13 (python+0x643251) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #3 _io_FileIO___init__ /home/ken/Documents/GitHub/cpython/./Modules/_io/clinic/fileio.c.h:134:20 (python+0x643251)
    #4 type_call /home/ken/Documents/GitHub/cpython/Objects/typeobject.c:2143:19 (python+0x386af6) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #5 _PyObject_MakeTpCall /home/ken/Documents/GitHub/cpython/Objects/call.c:242:18 (python+0x259183) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #6 _PyObject_VectorcallTstate /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_call.h:166:16 (python+0x25b406) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #7 _PyObject_CallFunctionVa /home/ken/Documents/GitHub/cpython/Objects/call.c (python+0x25b406)
    #8 PyObject_CallFunction /home/ken/Documents/GitHub/cpython/Objects/call.c:574:14 (python+0x25b0d3) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #9 _io_open_impl /home/ken/Documents/GitHub/cpython/./Modules/_io/_iomodule.c:331:15 (python+0x63ca77) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #10 _io_open /home/ken/Documents/GitHub/cpython/./Modules/_io/clinic/_iomodule.c.h:293:20 (python+0x63ca77)
    #11 cfunction_vectorcall_FASTCALL_KEYWORDS /home/ken/Documents/GitHub/cpython/Objects/methodobject.c:441:24 (python+0x318c4c) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #12 _PyObject_VectorcallTstate /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_call.h:168:11 (python+0x2589c1) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #13 PyObject_Vectorcall /home/ken/Documents/GitHub/cpython/Objects/call.c:327:12 (python+0x25a590) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #14 _PyEval_EvalFrameDefault /home/ken/Documents/GitHub/cpython/Python/generated_cases.c.h:1505:19 (python+0x4a5973) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #15 _PyEval_EvalFrame /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_ceval.h:119:16 (python+0x49b343) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #16 _PyEval_Vector /home/ken/Documents/GitHub/cpython/Python/ceval.c:1819:12 (python+0x49b343)
    #17 _PyFunction_Vectorcall /home/ken/Documents/GitHub/cpython/Objects/call.c (python+0x25aabe) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #18 _PyObject_VectorcallTstate /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_call.h:168:11 (python+0x260c31) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #19 method_vectorcall /home/ken/Documents/GitHub/cpython/Objects/classobject.c:70:20 (python+0x25ef55) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #20 _PyVectorcall_Call /home/ken/Documents/GitHub/cpython/Objects/call.c:273:16 (python+0x25a45f) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #21 _PyObject_Call /home/ken/Documents/GitHub/cpython/Objects/call.c:348:16 (python+0x25a6f7) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #22 PyObject_Call /home/ken/Documents/GitHub/cpython/Objects/call.c:373:12 (python+0x25a8e7) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #23 thread_run /home/ken/Documents/GitHub/cpython/./Modules/_threadmodule.c:337:21 (python+0x6a2168) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #24 pythread_wrapper /home/ken/Documents/GitHub/cpython/Python/thread_pthread.h:243:5 (python+0x5dd89b) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)

  Previous write of size 4 at 0x555555e963f4 by thread T1:
    #0 set_inheritable /home/ken/Documents/GitHub/cpython/Python/fileutils.c:1515:25 (python+0x5f30f9) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #1 _Py_set_inheritable /home/ken/Documents/GitHub/cpython/Python/fileutils.c:1605:12 (python+0x5f2efe) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #2 _io_FileIO___init___impl /home/ken/Documents/GitHub/cpython/./Modules/_io/fileio.c:447:13 (python+0x643251) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #3 _io_FileIO___init__ /home/ken/Documents/GitHub/cpython/./Modules/_io/clinic/fileio.c.h:134:20 (python+0x643251)
    #4 type_call /home/ken/Documents/GitHub/cpython/Objects/typeobject.c:2143:19 (python+0x386af6) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #5 _PyObject_MakeTpCall /home/ken/Documents/GitHub/cpython/Objects/call.c:242:18 (python+0x259183) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #6 _PyObject_VectorcallTstate /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_call.h:166:16 (python+0x25b406) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #7 _PyObject_CallFunctionVa /home/ken/Documents/GitHub/cpython/Objects/call.c (python+0x25b406)
    #8 PyObject_CallFunction /home/ken/Documents/GitHub/cpython/Objects/call.c:574:14 (python+0x25b0d3) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #9 _io_open_impl /home/ken/Documents/GitHub/cpython/./Modules/_io/_iomodule.c:331:15 (python+0x63ca77) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #10 _io_open /home/ken/Documents/GitHub/cpython/./Modules/_io/clinic/_iomodule.c.h:293:20 (python+0x63ca77)
    #11 cfunction_vectorcall_FASTCALL_KEYWORDS /home/ken/Documents/GitHub/cpython/Objects/methodobject.c:441:24 (python+0x318c4c) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #12 _PyObject_VectorcallTstate /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_call.h:168:11 (python+0x2589c1) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #13 PyObject_Vectorcall /home/ken/Documents/GitHub/cpython/Objects/call.c:327:12 (python+0x25a590) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #14 _PyEval_EvalFrameDefault /home/ken/Documents/GitHub/cpython/Python/generated_cases.c.h:1505:19 (python+0x4a5973) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #15 _PyEval_EvalFrame /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_ceval.h:119:16 (python+0x49b343) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #16 _PyEval_Vector /home/ken/Documents/GitHub/cpython/Python/ceval.c:1819:12 (python+0x49b343)
    #17 _PyFunction_Vectorcall /home/ken/Documents/GitHub/cpython/Objects/call.c (python+0x25aabe) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #18 _PyObject_VectorcallTstate /home/ken/Documents/GitHub/cpython/./Include/internal/pycore_call.h:168:11 (python+0x260c31) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #19 method_vectorcall /home/ken/Documents/GitHub/cpython/Objects/classobject.c:70:20 (python+0x25ef55) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #20 _PyVectorcall_Call /home/ken/Documents/GitHub/cpython/Objects/call.c:273:16 (python+0x25a45f) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #21 _PyObject_Call /home/ken/Documents/GitHub/cpython/Objects/call.c:348:16 (python+0x25a6f7) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #22 PyObject_Call /home/ken/Documents/GitHub/cpython/Objects/call.c:373:12 (python+0x25a8e7) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #23 thread_run /home/ken/Documents/GitHub/cpython/./Modules/_threadmodule.c:337:21 (python+0x6a2168) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)
    #24 pythread_wrapper /home/ken/Documents/GitHub/cpython/Python/thread_pthread.h:243:5 (python+0x5dd89b) (BuildId: aebd4996d08922f5e3af359bb646def4e05d4a16)

  Location is global 'set_inheritable.ioctl_works' of size 4 at 0x555555e963f4 (python+0x9423f4)

@bedevere-app bedevere-app bot mentioned this pull request Jun 15, 2024
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@Fidget-Spinner Fidget-Spinner requested a review from colesbury June 15, 2024 15:38
@ericsnowcurrently
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Out of curiosity, why did you close this?

@Fidget-Spinner
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I couldnt get it to not crash and I didnt know why :(

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@ericsnowcurrently ericsnowcurrently Awaiting requested review from ericsnowcurrently ericsnowcurrently is a code owner

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