Re: How do I prevent a function from being optimized out?
Re: How do I prevent a function from being optimized out?
- Subject: Re: How do I prevent a function from being optimized out?
- From: Andrew Gallatin <email@hidden>
- Date: Wed, 13 Apr 2005 17:50:06 -0400 (EDT)
Ben writes:
> I don't know, but the obvious(?) question I have is, "why?"
>
I was hoping nobdy would ask ;)
Because we need to override malloc, and the only way we can figure out
to do it is to
- force a flat namespace using DYLD_FORCE_FLAT_NAMESPACE
- link applications with -multiply_defined -u foo_hack()
- add foo_hack() into scalable_malloc.c along with the hooks we need
- include the scalable_malloc.o object in our lib.
As I understand it (I didn't come up with it) this forces the rtld to
load our scalable_malloc.o rather than the one from libc, since the first
thing it does is to go looking for foo_hack().
Drew
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