New submission from Debarshi Goswami:
Some support is needed to avoid compatibility issues in different version of
CRT in Windows.
I have an application which embeds Python interpreter and the application is
build on MSVC11, whereas I am using Python 3.3.2 which is build on MSVC10. I
know there are some compatibility issues which are addressed in Issue10082 and
Issue1003535. But even other Python APIs which uses FILE pointer inside are
failing too. I tried the following things –
1. PyRun_FileExFlags with MSVC11 FILE*. It crashes as expected.
2. PyRun_FileExFlags with MSVC10 FILE* using _Py_fopen() directly passing
to it. It is also crashing whereas _Py_fopen() returns FILE* of MSVC10 type.
3. Py_CompileString() also crashes. I don’t know the reason, but here my
application is not providing FILE* from outside. It uses FILE* of Python
library which is of MSVC10 type.
I did some investigation and found if I provide FILE* of MSVC10 type from my
application in PyRun_File() or if I call Py_CompileString(), it crashes after
parsing the file (I am not totally sure, but it seems to me). Here is the call
stack –
python33.dll!PyUnicode_InternInPlace(_object * * p) Line 14220 C
python33.dll!new_identifier(const char * n, compiling * c) Line 570 C
python33.dll!alias_for_import_name(compiling * c, const _node * n, int store)
Line 2808 C
python33.dll!ast_for_import_stmt(compiling * c, const _node * n) Line 2892 C
python33.dll!PyAST_FromNode(const _node * n, PyCompilerFlags * flags, const
char * filename, _arena * arena) Line 724 C
python33.dll!PyParser_ASTFromFile(_iobuf * fp, const char * filename, const
char * enc, int start, char * ps1, char * ps2, PyCompilerFlags * flags, int *
errcode, _arena * arena) Line 2124C
python33.dll!PyRun_FileExFlags(_iobuf * fp, const char * filename, int start,
_object * globals, _object * locals, int closeit, PyCompilerFlags * flags) Line
1931 C
It fails in PyDict_GetItem() call in PyUnicode_InternInPlace() function. Here
is the snippet -
/* It might be that the GetItem call fails even
though the key is present in the dictionary,
namely when this happens during a stack overflow. */
Py_ALLOW_RECURSION
t = PyDict_GetItem(interned, s);
Py_END_ALLOW_RECURSION
I am not sure why PyDict_GetItem() is failing because of FILE*. It seems to me
that Python is able to parse file provided successfully.
I am initializing interpreter successfully and PyRun_String() API works fine.
But I dont want to use PyRun_String() as it performs everything virtually and
provide no debug support.
--
components: Interpreter Core, Windows
messages: 200238
nosy: debarshig
priority: normal
severity: normal
status: open
title: Need support to avoid Windows CRT compatibility issue.
versions: Python 3.3
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http://bugs.python.org/issue19283
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