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Re: Organization of breakpoint locations
On Mon, Feb 19, 2007 at 01:54:27PM +0100, Thomas Neumann wrote:
> > these? Your key would not be the address, but the address plus the
> > breakpoint sequence number. That handles one and two. Then you can
> good idea. I thought that a breakpoint could have more than one
> bp_location associated with it, preventing such a scheme (but even then
> a breakpoint would probably not have more than one location with the
> same address).
It can't yet have more than one bp_location, but the separation is
there for a reason - I think the one to many mapping will arrive
sometime this year. But I think we can add a sequence number to
bp_location's just like breakpoints have.
> > To be honest, I don't think this will be a small change either way.
> I will give the libiberty splay a try, that should be easy. But if
> resetting breakpoints is indeed as slow as you indicated, by patch is
> probably pointless. What a shame. That would have been a very portable
> and nice way to automatically trace execution flow.
I'd like GDB to be able to manage huge breakpoint lists; I'm just
warning you that a lot more work will have to be done first ;-)
One nice thing is that if you kill or crash GDB today, it tends
to leave breakpoints removed. If it didn't do this huge massive
removal, it probably wouldn't - perhaps we should add a signal handler
that takes care of that if we change it.