Re: [Valgrind-developers] Merging stage2.c and vg_main.c [was Re: tool-specific CLOs] (fwd)

[Jeremy F. <je...@go...>]

On Fri, 2004-01-23 at 09:20, Nicholas Nethercote wrote:
> Which is bad news for detecting bugs in the JIT-compiler;  you can't do
> the binary search technique for finding erroneous BBs.
> 
> (Well, you probably can if your error and the manifestation of it are
> close enough, but if it's a subtle error that doesn't manifest for a
> while, it won't work.)
> 
> Any way we can achieve the same effect?

Well, it was always a fairly crippled mechanism, since it never worked
with threaded programs, or if signals happened.

I guess you could try to set up a limited environment which can coddle a
bit more execution out of the client, but it might turn out to be a
significant amount of work, which would be bad.  And the more we do to
improve Valgrind's virtualization, the less likely it is that we can
maintain this easily.

I agree with you about the debugging, but I don't really see how to
achieve it.

	J