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patch 8.2.1381: MS-Windows: crash with Python 3.5 when stdin is redirected

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Problem:    MS-Windows: crash with Python 3.5 when stdin is redirected.
Solution:   Reconnect stdin. (Yasuhiro Matsumoto, Ken Takata, closes #6641)
This commit is contained in:
Bram Moolenaar
2020-08-06 21:47:11 +02:00
parent 3d945cc925
commit 56b8dc331d
4 changed files with 51 additions and 1 deletions
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42
src/if_python3.c
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@@ -907,6 +907,47 @@ python3_loaded(void)
static wchar_t *py_home_buf = NULL;
#if defined(MSWIN) && (PY_VERSION_HEX >= 0x030500f0)
// Python 3.5 or later will abort inside Py_Initialize() when stdin is
// redirected. Reconnect stdin to CONIN$.
// Note that the python DLL is linked to its own stdio DLL which can be
// differ from Vim's stdio.
static void
reset_stdin(void)
{
FILE *(*py__acrt_iob_func)(unsigned) = NULL;
FILE *(*pyfreopen)(const char *, const char *, FILE *) = NULL;
HINSTANCE hinst;
# ifdef DYNAMIC_PYTHON3
hinst = hinstPy3;
# else
hinst = GetModuleHandle(PYTHON3_DLL);
# endif
if (hinst == NULL)
return;
// Get "freopen" and "stdin" which are used in the python DLL.
// "stdin" is defined as "__acrt_iob_func(0)" in VC++ 2015 or later.
py__acrt_iob_func = get_dll_import_func(hinst, "__acrt_iob_func");
if (py__acrt_iob_func)
{
HINSTANCE hpystdiodll = find_imported_module_by_funcname(hinst,
"__acrt_iob_func");
if (hpystdiodll)
pyfreopen = (void*)GetProcAddress(hpystdiodll, "freopen");
}
// Reconnect stdin to CONIN$.
if (pyfreopen)
pyfreopen("CONIN$", "r", py__acrt_iob_func(0));
else
freopen("CONIN$", "r", stdin);
}
#else
# define reset_stdin()
#endif
static int
Python3_Init(void)
{
@@ -939,6 +980,7 @@ Python3_Init(void)
PyImport_AppendInittab("vim", Py3Init_vim);
reset_stdin();
Py_Initialize();
// Initialise threads, and below save the state using