Details
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Bug
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Resolution: Out of scope
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Not Evaluated
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None
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5.15.2
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None
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python 3.9.5
archlinux
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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