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Date: Tue, 15 Apr 2008 16:27:32 +0200
From: "Antoine Brodin" <antoine@FreeBSD.org>
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Cc: Volker <volker@vwsoft.com>, hackers@freebsd.org
Subject: Re: "visualize" kernel memory allocations
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On Tue, Apr 15, 2008 at 2:37 PM, Antoine Brodin <antoine@freebsd.org> wrote:
> On Mon, Apr 14, 2008 at 9:18 PM, Volker <volker@vwsoft.com> wrote:
>  > Hi hackers!
>  >
>  >  I need to hunt kernel memory allocations done by a kld. Unfortunately
>  >  the kld in question is a blob, no access to source code, so I need to
>  >  check for kmem_alloc() + kmem_malloc() + kmem_free() and print
>  >  information from there to the console screen.
>
>  Hi Volker,
>
>  You could patch your kld (hexadecimal editor or something like that)
>  to call wrappers around the interesting functions that print the
>  arguments.

"objcopy --redefine-syms" seems to be easier to use than a hexadecimal editor.

Cheers,

Antoine