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Date: Wed, 5 Dec 2001 16:40:57 -0500
From: Christopher Faylor <cygwin AT cygwin DOT com>
To: Henning DOT Moll AT gfk DOT de
Cc: cygwin AT cygwin DOT com
Subject: Re: questions on dlopen
Message-ID: <20011205214057.GE17608@redhat.com>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: Henning DOT Moll AT gfk DOT de, cygwin AT cygwin DOT com
References: <OF2B03EAE7 DOT 3CB80FA7-ONC1256B19 DOT 0049714D AT gfk DOT de>
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On Wed, Dec 05, 2001 at 02:45:04PM +0100, Henning DOT Moll AT gfk DOT de wrote:
>Hi Chris!
>
>i found your email adress in a posting which seems to be releated to the
>problems i have...
>
>I try to port a tool 'ccmalloc' for detection of memory leaks to Win32 via
>cygwin. At the moment this tool is known to compile on Linux and Solaris
>only. If you want to have a look on it:
>
>http://www.inf.ethz.ch/personal/biere/projects/ccmalloc/
>
>The fundamental part is that it overwrites the malloc resp. free function
>of libc with own functions. These functions then try to call the libcs
>implementation of malloc/free by using dlopen(LIBC) and dlsym(handle,
>"MALLOC_SYMBOL")
>
>First of all there's no libc.so in my cygwin installation. Only a libc.a. I
>played a little bit around, but dlopen fails. Then i tried to point dlopen
>to the cygwin1.dll. That worked for dlopen and dlsym. But now, other
>strange things appear. (calling fopen leads to core dump)...
>
>I know this are very few informations, but maybe you have some ideas and
>can give me some suggestions...
>
>Thank you very much!
>
>Henning

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