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  1. Qt for Python
  2. PYSIDE-1616

repeated py_initialize fails

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Not Evaluated
    • Resolution: Out of scope
    • Affects Version/s: 5.15.2
    • Fix Version/s: None
    • Component/s: Shiboken
    • Labels:
      None
    • Environment:
      python 3.9.5
      archlinux
    • Platform/s:
      Linux/X11

      Description

      repeated calls to py_initialize fail. I was trying to build a MWE for another crash similar to but instead I am now running into a different crash here:

      #include <Python.h>
      #include <shiboken.h>
      
      #include <QCoreApplication>
      #include <QStringList>
      #include <QDir>
      #include <QDebug>
      #include <QObject>
      #include <QPointer>
      
      using namespace std;
      
      void test()
      {
          qWarning() << "init";
          Py_Initialize();
      
          QPointer<QObject> timer;
          {
              Shiboken::AutoDecRef module(PyImport_ImportModule("__main__"));
              Shiboken::AutoDecRef globalDict(PyModule_GetDict(module));
      
              Shiboken::AutoDecRef compiled(Py_CompileString("from PySide2 import QtCore\ntimer = QtCore.QTimer()\n", "test.py", Py_file_input));
              qWarning() << compiled.isNull();
      
              Shiboken::AutoDecRef ret(PyEval_EvalCode(compiled, globalDict, globalDict));
              qWarning() << ret.isNull();
      
              auto pyTimer = PyDict_GetItemString(globalDict, "timer");
              qWarning() << pyTimer;
      
              auto converter = Shiboken::Conversions::getConverter("QObject*");
              qWarning() << converter;
      
              QObject *ptr = nullptr;
              Shiboken::Conversions::pythonToCppPointer(converter, pyTimer, &ptr);
              qWarning() << ptr;
              timer = ptr;
          }
      
          qWarning() << timer;
          Py_Finalize();
          qWarning() << "deinit" << timer;
      }
      
      int main(int argc, char** argv)
      {
          QCoreApplication app(argc, argv);
          test();
          test();  // << crash
          return 0;
      }
      

      when compiled locally with

      g++ test.cpp -lpython3.9 -lQt5Core -lshiboken2.cpython-39-x86_64-linux-gnu -I /usr/include/python3.9/ -I /usr/include/shiboken2/ -I /usr/include/qt -I /usr/include/qt/QtCore/ -fPIC -fsanitize=address,undefined -g
      

      triggers this crash (the first round works as expected, second test crashes):

           0.000 warning: test[test.cpp:15]: init
           0.019 warning: test[test.cpp:24]: false
           0.056 warning: test[test.cpp:27]: false
           0.056 warning: test[test.cpp:30]: 0x7f8fae5c1900
           0.056 warning: test[test.cpp:33]: 0x60600001dfc0
           0.056 warning: test[test.cpp:37]: QTimer(0x60400001ee50)
           0.056 warning: test[test.cpp:41]: QObject(0x0)
           0.061 warning: test[test.cpp:43]: deinit QObject(0x0)
           0.061 warning: test[test.cpp:15]: init
      AddressSanitizer:DEADLYSIGNAL
      =================================================================
      ==298597==ERROR: AddressSanitizer: SEGV on unknown address (pc 0x7f8fb56745a1 bp 0x000000000037 sp 0x7ffc1a9cedf0 T0)
      ==298597==The signal is caused by a READ memory access.
      ==298597==Hint: this fault was caused by a dereference of a high value address (see register values below).  Dissassemble the provided pc to learn which register was used.
          #0 0x7f8fb56745a1 in pymalloc_alloc Objects/obmalloc.c:1621
          #1 0x7f8fb56745a1 in _PyObject_Malloc Objects/obmalloc.c:1640
          #2 0x7f8fb56745a1 in PyObject_Malloc Objects/obmalloc.c:685
          #3 0x7f8fb56a32d6 in PyUnicode_New Objects/unicodeobject.c:1447
          #4 0x7f8fb56a32d6 in unicode_decode_utf8 Objects/unicodeobject.c:5009
          #5 0x7f8fb565cbf5 in PyDict_SetItemString Objects/dictobject.c:3505
          #6 0x7f8fb573e022 in PyModule_AddObject Python/modsupport.c:656
          #7 0x7f8fb573e022 in PyModule_AddIntConstant Python/modsupport.c:668
          #8 0x7f8fb57a9519 in PyInit__signal Modules/signalmodule.c:1535
          #9 0x7f8fb573147a in _imp_create_builtin Python/import.c:1295
          #10 0x7f8fb566a6a6 in cfunction_vectorcall_O Objects/methodobject.c:512
          #11 0x7f8fb570c6fb in do_call_core Python/ceval.c:5092
          #12 0x7f8fb570c6fb in _PyEval_EvalFrameDefault Python/ceval.c:3580
          #13 0x7f8fb5705d60 in _PyEval_EvalFrame Include/internal/pycore_ceval.h:40
          #14 0x7f8fb5705d60 in _PyEval_EvalCode Python/ceval.c:4327
          #15 0x7f8fb561c8eb in _PyFunction_Vectorcall Objects/call.c:396
          #16 0x7f8fb5706c3e in _PyObject_VectorcallTstate Include/cpython/abstract.h:118
          #17 0x7f8fb5706c3e in PyObject_Vectorcall Include/cpython/abstract.h:127
          #18 0x7f8fb5706c3e in call_function Python/ceval.c:5072
          #19 0x7f8fb5706c3e in _PyEval_EvalFrameDefault Python/ceval.c:3518
          #20 0x7f8fb561c853 in _PyEval_EvalFrame Include/internal/pycore_ceval.h:40
          #21 0x7f8fb561c853 in function_code_fastcall Objects/call.c:330
          #22 0x7f8fb561c853 in _PyFunction_Vectorcall Objects/call.c:367
          #23 0x7f8fb561fa5c in _PyObject_VectorcallTstate Include/cpython/abstract.h:118
          #24 0x7f8fb561fa5c in method_vectorcall Objects/classobject.c:53
          #25 0x7f8fb570b5d8 in _PyObject_VectorcallTstate Include/cpython/abstract.h:118
          #26 0x7f8fb570b5d8 in PyObject_Vectorcall Include/cpython/abstract.h:127
          #27 0x7f8fb570b5d8 in call_function Python/ceval.c:5072
          #28 0x7f8fb570b5d8 in _PyEval_EvalFrameDefault Python/ceval.c:3487
          #29 0x7f8fb561c853 in _PyEval_EvalFrame Include/internal/pycore_ceval.h:40
          #30 0x7f8fb561c853 in function_code_fastcall Objects/call.c:330
          #31 0x7f8fb561c853 in _PyFunction_Vectorcall Objects/call.c:367
          #32 0x7f8fb5706c3e in _PyObject_VectorcallTstate Include/cpython/abstract.h:118
          #33 0x7f8fb5706c3e in PyObject_Vectorcall Include/cpython/abstract.h:127
          #34 0x7f8fb5706c3e in call_function Python/ceval.c:5072
          #35 0x7f8fb5706c3e in _PyEval_EvalFrameDefault Python/ceval.c:3518
          #36 0x7f8fb561c853 in _PyEval_EvalFrame Include/internal/pycore_ceval.h:40
          #37 0x7f8fb561c853 in function_code_fastcall Objects/call.c:330
          #38 0x7f8fb561c853 in _PyFunction_Vectorcall Objects/call.c:367
          #39 0x7f8fb5706c3e in _PyObject_VectorcallTstate Include/cpython/abstract.h:118
          #40 0x7f8fb5706c3e in PyObject_Vectorcall Include/cpython/abstract.h:127
          #41 0x7f8fb5706c3e in call_function Python/ceval.c:5072
          #42 0x7f8fb5706c3e in _PyEval_EvalFrameDefault Python/ceval.c:3518
          #43 0x7f8fb561c853 in _PyEval_EvalFrame Include/internal/pycore_ceval.h:40
          #44 0x7f8fb561c853 in function_code_fastcall Objects/call.c:330
          #45 0x7f8fb561c853 in _PyFunction_Vectorcall Objects/call.c:367
          #46 0x7f8fb5706c3e in _PyObject_VectorcallTstate Include/cpython/abstract.h:118
          #47 0x7f8fb5706c3e in PyObject_Vectorcall Include/cpython/abstract.h:127
          #48 0x7f8fb5706c3e in call_function Python/ceval.c:5072
          #49 0x7f8fb5706c3e in _PyEval_EvalFrameDefault Python/ceval.c:3518
          #50 0x7f8fb561c853 in _PyEval_EvalFrame Include/internal/pycore_ceval.h:40
          #51 0x7f8fb561c853 in function_code_fastcall Objects/call.c:330
          #52 0x7f8fb561c853 in _PyFunction_Vectorcall Objects/call.c:367
          #53 0x7f8fb561c315 in _PyObject_VectorcallTstate Include/cpython/abstract.h:118
          #54 0x7f8fb561c315 in object_vacall Objects/call.c:792
          #55 0x7f8fb561df57 in _PyObject_CallMethodIdObjArgs Objects/call.c:883
          #56 0x7f8fb57318f5 in import_find_and_load Python/import.c:1771
          #57 0x7f8fb57318f5 in PyImport_ImportModuleLevelObject Python/import.c:1872
          #58 0x7f8fb56fee79 in builtin___import__ Python/bltinmodule.c:280
          #59 0x7f8fb566a8ad in cfunction_call Objects/methodobject.c:539
          #60 0x7f8fb561bf57 in _PyObject_MakeTpCall Objects/call.c:191
          #61 0x7f8fb561e508 in _PyObject_VectorcallTstate Include/cpython/abstract.h:116
          #62 0x7f8fb561e508 in _PyObject_VectorcallTstate Include/cpython/abstract.h:103
          #63 0x7f8fb561e508 in _PyObject_CallFunctionVa Objects/call.c:543
          #64 0x7f8fb561e508 in PyObject_CallFunction Objects/call.c:565
          #65 0x7f8fb5731f51 in PyImport_Import Python/import.c:2073
          #66 0x7f8fb572e72d in PyImport_ImportModule Python/import.c:1488
          #67 0x7f8fb57a9061 in signal_install_handlers Modules/signalmodule.c:1810
          #68 0x7f8fb57a9061 in _PySignal_Init Modules/signalmodule.c:1833
          #69 0x7f8fb5745a33 in init_interp_main Python/pylifecycle.c:1015
          #70 0x7f8fb574529e in pyinit_main Python/pylifecycle.c:1097
          #71 0x7f8fb5744952 in Py_InitializeFromConfig Python/pylifecycle.c:1141
          #72 0x7f8fb5744a14 in Py_InitializeEx Python/pylifecycle.c:1172
          #73 0x556f8d0f9e75 in test() /tmp/test.cpp:16
          #74 0x556f8d0faeef in main /tmp/test.cpp:50
          #75 0x7f8fb4042b24 in __libc_start_main (/usr/lib/libc.so.6+0x27b24)
          #76 0x556f8d0f9b0d in _start (/tmp/a.out+0xab0d)
      
      AddressSanitizer can not provide additional info.
      SUMMARY: AddressSanitizer: SEGV Objects/obmalloc.c:1621 in pymalloc_alloc
      

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            Assignee:
            kleint Friedemann Kleint
            Reporter:
            milianw Milian Wolff
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              Created:
              Updated:
              Resolved:

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