Bugs item #1311784, was opened at 2005-10-03 14:18 Message generated for change (Comment added) made by loewis You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1311784&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Windows Group: Python 2.4 Status: Open Resolution: None Priority: 5 Submitted By: Peter Klotz (pete_icoserve) Assigned to: Nobody/Anonymous (nobody) Summary: python.exe 2.4.2 compiled with VS2005 crashes Initial Comment: The C runtime library shipped with Visual Studio 2005 performs strict checking of parameters. In function initsignal() in file Modules\signalmodule.c, an iteration over all signals from 1 to NSIG is performed. The function PyOS_getsig() is called with each of these integer values. PyOS_getsig() then calls signal() with the given value which leads to the crash. According to signal.h from VS2005 only these signals are allowed: #define SIGINT 2 #define SIGILL 4 #define SIGABRT_COMPAT 6 #define SIGFPE 8 #define SIGSEGV 11 #define SIGTERM 15 #define SIGBREAK 21 #define SIGABRT 22 A solution would be to restrict the loop in initsignal() to the above values under Windows. ---------------------------------------------------------------------- >Comment By: Martin v. Löwis (loewis) Date: 2005-10-08 11:56 Message: Logged In: YES user_id=21627 Can somebody please study the source of the C runtime of VS2005 (probably needs to be requested specifically during installation), to find out whether more generic solutions are available. Possible solutions include: - don't call signal, but call an alternative function instead which won't cause a crash - set some magic variable, disabling the error checking - fetch the list of supported signals from somewhere (at compile time or at run time), and iterate over that list. Anyway, I don't see the official Python 2.5 release built with VS 2005, so this is a minor issue - I rather expect Python to skip VS 2005, and go right to the version that succeeds it. ---------------------------------------------------------------------- Comment By: Peter Klotz (pete_icoserve) Date: 2005-10-04 10:02 Message: Logged In: YES user_id=299547 I would leave the code for pre-VS2005 compilers as is and introduce a specific workaround for VS2005 and all following compilers. Something like this comes to my mind: #if defined (_WIN32) && _MSC_VER >= 1400 ... #endif This works for 32 and 64 bit platforms since _WIN32 is defined in both cases. ---------------------------------------------------------------------- Comment By: Neal Norwitz (nnorwitz) Date: 2005-10-03 21:54 Message: Logged In: YES user_id=33168 Do you suggest this be special cased for VS2005 specifically or Windows in general (ie, any version/compiler)? ---------------------------------------------------------------------- Comment By: Peter Klotz (pete_icoserve) Date: 2005-10-03 20:10 Message: Logged In: YES user_id=299547 VS2005 is still not released. It is scheduled for November 7th 2005. I tested with CTP (Community Technology Preview) August 2005. However I doubt they will change the behavior of their C library at this point of development. ---------------------------------------------------------------------- Comment By: Michael Hudson (mwh) Date: 2005-10-03 15:05 Message: Logged In: YES user_id=6656 Is VS2005 actually out now then? This behaviour violates the C standard, as far as we can tell, so we when VS2005 was in beta we hoped that they would fix it for the final release. If it is released, though, I guess we need to do something like you suggest (along with some colourful comments, I guess). ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1311784&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
