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Date: Wed, 18 Apr 2018 17:06:08 -0400
From: Rich Felker <>
Subject: Re: tcmalloc compatibility

On Wed, Apr 18, 2018 at 10:50:24PM +0200, Florian Weimer wrote:
> * Szabolcs Nagy:
> > even with the very small set of libc apis that a malloc
> > interposer may want to use, there known (but undocumented)
> > caveats:
> >
> > - glibc dlsym calls calloc (bites anybody who tries to wrap
> > calloc in the usual way)
> That's not what I meant with an interposed malloc.  Any such partial
> interposition is going to be very tricky indeed.

I don't understand. By "partial interposition" do you mean partial in
the sense of "wrapping and calling the original via dlsym" or in the
sense of "replacing some but not all allocator functions"?


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