Re: What I suspect
Brandon S. Allbery KF8NH (allbery@kf8nh.apk.net)
Wed, 08 Dec 1999 19:19:07 -0500
In message <Pine.LNX.4.10.9912080840210.1474-100000@penguin.transmeta.com>,
Lin
us Torvalds writes:
+-----
| On Wed, 8 Dec 1999, David S. Miller wrote:
| > It's not an odd event. It's a feature... Say you want to provide
| > your own special malloc, your strong "malloc" symbol now not only
| > overrides the global references to the "malloc" symbol in the binary
| > itself, but also all of those global references within libc too (and
| > all other shared libraries you load, even via dl_open()). If you want
| > to override any and all malloc activity (and this is useful for
| > malloc/free leak debuggers like electric fence for example) this
| > global weak overriding mechanism is the way it can be done.
|
| The above case you can KNOW at link-time. Your linker can (and will)
+--->8
Say I want to enable malloc checking at runtime. I use LD_PRELOAD for
that... whoops! Doesn't work. In fact, the best I can hope for is complete
ineffectiveness: it is likely to cause complete breakage, if some things
use my LD_PRELOAD'ed malloc() et al. and others use the standard one.
--
brandon s. allbery os/2,linux,solaris,perl allbery@kf8nh.apk.net
system administrator kthkrb,heimdal,gnome,rt allbery@ece.cmu.edu
carnegie mellon / electrical and computer engineering kf8nh
We are Linux. Resistance is an indication that you missed the point.
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