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Apparently FreeBSD enables some HW floating-point exceptions by default.

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This can cause core dumps when Python runs.  Python relies on the 754-
(and C99-) mandated default "non-stop" mode for FP exceptions.  This
patch from Ben Laurie disables at least one FP exception on FreeBSD at
Python startup time.
This commit is contained in:
Tim Peters 2002-12-28 21:56:08 +00:00
parent 5b26abb37a
commit 4643bd9a9c
3 changed files with 26 additions and 5 deletions
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15
Modules/python.c
View file

@ -2,8 +2,23 @@
#include "Python.h"
#ifdef __FreeBSD__
#include <floatingpoint.h>
#endif
int
main(int argc, char **argv)
{
/* 754 requires that FP exceptions run in "no stop" mode by default,
* and until C vendors implement C99's ways to control FP exceptions,
* Python requires non-stop mode. Alas, some platforms enable FP
* exceptions by default. Here we disable them.
*/
#ifdef __FreeBSD__
fp_except_t m;
m = fpgetmask();
fpsetmask(m & ~FP_X_OFL);
#endif
return Py_Main(argc, argv);
}