[Numeric-interest] longjmp from signal handler

[Fred J. Tydeman]

The C standard is now open for revision.

One item being considered is requiring signal handlers to be able to
do a longjmp(), for at least SIGFPE, and perhaps all signals.
Currently that results in undefined behaviour [C99 7.14.1.1 The signal
function, paragraph 5].

Does anyone know of an implementation that will break because of this
proposed requirement?

Does anyone know of any numeric applications need this feature?

Does anyone know of papers that discuss using signal / trap / exception
handlers for floating-point exceptions?

---
Fred J. Tydeman        Tydeman Consulting
tydeman at tybor.com      Testing, numerics, programming
+1 (775) 358-9748      Vice-chair of J11 (ANSI "C")
Sample C99+FPCE tests: http://www.tybor.com
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