[New-bugs-announce] [issue10071] Should not release GIL while running RegEnumValue
Hirokazu Yamamoto
report at bugs.python.org
Tue Oct 12 13:43:24 CEST 2010
New submission from Hirokazu Yamamoto <ocean-city at m2.ccsnet.ne.jp>:
Currently, PC/winreg.c releases GIL while calling registry
API, but I found this in Remarks section of RegEnumValue.
http://msdn.microsoft.com/en-us/library/ms724865%28VS.85%29.aspx
> While using RegEnumValue, an application should not call any registry
> functions that might change the key being queried.
Maybe we shouldn't release GIL in PC/winreg.c? Thank you.
# I sometimes experienced crash of test_changing_value(test_winreg)
# on release27-maint. It happens when 2 threads calls PyEnumValue and
# PySetValue simultaneously. And I could stop it by following patch.
# I'll attach the stack trace of crash.
Index: PC/_winreg.c
===================================================================
--- PC/_winreg.c (revision 85344)
+++ PC/_winreg.c (working copy)
@@ -1219,7 +1219,6 @@
}
while (1) {
- Py_BEGIN_ALLOW_THREADS
rc = RegEnumValue(hKey,
index,
retValueBuf,
@@ -1228,7 +1227,6 @@
&typ,
(BYTE *)retDataBuf,
&retDataSize);
- Py_END_ALLOW_THREADS
if (rc != ERROR_MORE_DATA)
break;
@@ -1577,9 +1575,7 @@
if (subKey == NULL)
return NULL;
}
- Py_BEGIN_ALLOW_THREADS
rc = RegSetValue(hKey, subKey, REG_SZ, str, len+1);
- Py_END_ALLOW_THREADS
if (rc != ERROR_SUCCESS)
return PyErr_SetFromWindowsErrWithFunction(rc, "RegSetValue");
Py_INCREF(Py_None);
----------
components: Extension Modules
files: py27_test_winreg_crash_stack_trace.txt
messages: 118413
nosy: ocean-city
priority: normal
severity: normal
status: open
title: Should not release GIL while running RegEnumValue
versions: Python 2.7, Python 3.1, Python 3.2
Added file: http://bugs.python.org/file19198/py27_test_winreg_crash_stack_trace.txt
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