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Re: Release RTL bodies after compilation (sometimes)



On Sat, 18 Sep 2004, Daniel Berlin wrote:



Actually, it's not an effect at all.  You can only safely use ggc_free
on an object which is not referenced.  Objects which are not
referenced are not marked.

This isn't necessarily true.

You may forget to null out the pointer, accidently keeping it, and what it points to, live (since unless it's marked deletable, the gc doesn't know it can null it for you).

Just to be clear here, i'm talking about things that are marked GTY (ie, roots), and in reality, are unreferenced, but you forgot to null the pointer, so the GC doesn't know that.
If you ggc_free it, you've caused the same effect as properly nulling it.
Obviously, ggc_free can't change the number of marked objects except through this way.

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