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Re: [PATCH] gdb script performance
On Thu, 2006-11-30 at 14:18 +0100, Jean-Marc Saffroy wrote:
> On Wed, 29 Nov 2006, Jim Blandy wrote:
>
> > When the user changes the symbol file (or when GDB notices it has
> > changed and automatically re-reads it), the section and symtab objects
> > your static variables are pointing to will be freed. If you then get a
> > spurious cache hit, you'll hand out a pointer to garbage. So you'll
> > need to invalidate the cache whenever the section or symtab get freed.
>
> Yes, that's what I meant when I said that hooks for invalidating the
> caches are missing, but I haven't looked yet where they should be added.
>
> BTW I don't know if the test suite would catch this; if not, a test should
> probably be added.
A test would be a good idea, yes.
BTW, I think you have a worthwhile idea here,
and I hope you continue to refine it. There
are some serious performance issues in gdb.
Michael