#9678: Rewrite interrupt handling
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Reporter: jdemeyer | Owner: jdemeyer
Type: task | Status: positive_review
Priority: blocker | Milestone: sage-4.7
Component: c_lib | Keywords: interrupt, error, c, cython
Author: Jeroen Demeyer | Upstream: N/A
Reviewer: Volker Braun | Merged:
Work_issues: |
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Comment(by jdemeyer):
Replying to [comment:40 vbraun]:
> After many more rebuilds I found the problem: On i386 (and only i386)
the Parma Polyhedra library (PPL, #10039) tests if SSE is available. It
does this during the library initialization by installing a SIGILL handler
and then issuing SSE instructions. It then resets the handler to
`signal(SIGILL, SIG_DFL)`. Clearly, this deactivates Sage's SIGILL
handler.
I consider this to be a bug in PPL. Using `sigaction()` or `signal()`, it
is possible to save an existing signal handler and then restore it
afterwards.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9678#comment:41>
Sage <http://www.sagemath.org>
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