Re: Definition of BUG on x86

From: Jeremy Fitzhardinge
Date: Thu Feb 19 2009 - 11:34:30 EST


Ingo Molnar wrote:
Well, the important question is thatGCC will optimize out whatever comes after the __builtin_trap(), right? To guarantee an assert we can do something like:

__builtin_trap();
panic("should never get here");

to guarantee a message. (But realistically GCC will at most generate a build error.)

Ah, right, I remember the problem. There's no guaranteed way of getting the address of the ud2a instruction __builtin_trap generates to put it into the bug table.

J
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