Issue #27932: Prevent memory leak in win32_ver().

1 files changed, 1 insertions, 60 deletions

diff --git a/Lib/platform.py b/Lib/platform.py
index ee315fa319..e48ad0b6e7 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -497,65 +497,6 @@ _WIN32_SERVER_RELEASES = {
     (6, None): "post2012ServerR2",
 }
 
-def _get_real_winver(maj, min, build):
-    if maj < 6 or (maj == 6 and min < 2):
-        return maj, min, build
-
-    from ctypes import (c_buffer, POINTER, byref, create_unicode_buffer,
-                        Structure, WinDLL)
-    from ctypes.wintypes import DWORD, HANDLE
-
-    class VS_FIXEDFILEINFO(Structure):
-        _fields_ = [
-            ("dwSignature", DWORD),
-            ("dwStrucVersion", DWORD),
-            ("dwFileVersionMS", DWORD),
-            ("dwFileVersionLS", DWORD),
-            ("dwProductVersionMS", DWORD),
-            ("dwProductVersionLS", DWORD),
-            ("dwFileFlagsMask", DWORD),
-            ("dwFileFlags", DWORD),
-            ("dwFileOS", DWORD),
-            ("dwFileType", DWORD),
-            ("dwFileSubtype", DWORD),
-            ("dwFileDateMS", DWORD),
-            ("dwFileDateLS", DWORD),
-        ]
-
-    kernel32 = WinDLL('kernel32')
-    version = WinDLL('version')
-
-    # We will immediately double the length up to MAX_PATH, but the
-    # path may be longer, so we retry until the returned string is
-    # shorter than our buffer.
-    name_len = actual_len = 130
-    while actual_len == name_len:
-        name_len *= 2
-        name = create_unicode_buffer(name_len)
-        actual_len = kernel32.GetModuleFileNameW(HANDLE(kernel32._handle),
-                                                 name, len(name))
-        if not actual_len:
-            return maj, min, build
-
-    size = version.GetFileVersionInfoSizeW(name, None)
-    if not size:
-        return maj, min, build
-
-    ver_block = c_buffer(size)
-    if (not version.GetFileVersionInfoW(name, None, size, ver_block) or
-        not ver_block):
-        return maj, min, build
-
-    pvi = POINTER(VS_FIXEDFILEINFO)()
-    if not version.VerQueryValueW(ver_block, "", byref(pvi), byref(DWORD())):
-        return maj, min, build
-
-    maj = pvi.contents.dwProductVersionMS >> 16
-    min = pvi.contents.dwProductVersionMS & 0xFFFF
-    build = pvi.contents.dwProductVersionLS >> 16
-
-    return maj, min, build
-
 def win32_ver(release='', version='', csd='', ptype=''):
     try:
         from sys import getwindowsversion
@@ -567,7 +508,7 @@ def win32_ver(release='', version='', csd='', ptype=''):
         from _winreg import OpenKeyEx, QueryValueEx, CloseKey, HKEY_LOCAL_MACHINE
 
     winver = getwindowsversion()
-    maj, min, build = _get_real_winver(*winver[:3])
+    maj, min, build = winver.platform_version or winver[:3]
     version = '{0}.{1}.{2}'.format(maj, min, build)
 
     release = (_WIN32_CLIENT_RELEASES.get((maj, min)) or