Just a quick question...
I've been attempting to trap floating point badness by setting up a SIGFPE handler. However, I'm not seeing it trigger, even for simple test code that forces division by zero. I'm generating bitcode with llvm-gcc and then executing it with a (modified) version of the jitter, for reference.
Is there any arcane magic necessary to turn on SIGFPE generation?
Thank you in advance,
Sarah
Most platforms default to "non-stop" mode, where floating-point
exceptions do not trap. The interfaces defined in <fenv.h> can be
used to query floating-point exceptions. Trapping on exceptions
can usually be enabled, though it requires platform-specific code.
See your platform's documentation for details.
Note that enabling traps can cause degraded performance, and it
can cause incompatibilities with library code that doesn't expect
it.
Dan