Q: wrapper for malloc - possible?

[Heiko Nardmann]

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I want to trace calls to malloc using the LD_PRELOAD mechanism.
Is this possible?

Currently I tried to dlopen() the libc and get the symbol from it to have the 
real pointer. But that fails because dlopen() itself uses malloc().

I also tried to use the '--wrap malloc' option of ld. dlopen() now works fine 
but I do not see any output of my __wrap_malloc() function. Is it because the 
application to be traced is not linked with '--wrap malloc'? How can I 
circumvent this problem? Has anyone done such stuff?

Or do I have to copy the malloc() implementation of glibc to my source?

- -- 
Heiko Nardmann (Dipl.-Ing.), h.nardmann@secunet.de, Software Development
secunet Security Networks AG - Sicherheit in Netzwerken (www.secunet.de),
Weidenauer Str. 223-225, D-57076 Siegen
Tel. : +49 271 48950-13, Fax  : +49 271 48950-50
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