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From Dirk-Willem van Gulik <>
Subject Re: [PATCH] DTrace probes patch.
Date Tue, 06 May 2008 12:21:53 GMT

On May 5, 2008, at 9:27 PM, Theo Schlossnagle wrote:

> The patch has some nastiness to it that I'm sure people would want  
> to strategize on cleaning up.  The main issue being that Apache is  
> constructed from a bunch of static apr/libtool built libraries.   
> DTrace doesn't work on archives.  So, I've got some bloody knuckles  
> from bending the build system to keep things as normal ELF objects.
> I had a first good step... and then a red herring issue that I  
> worked through with the DTrace team led me to a much less-elegant  
> way of building. I could revert to the original process (ld -r -o  
> the objects into library-esque packages) as DTrace can work on those.
> The probes are neatly defined and placed, but the patches to the  
> build system are gruesome.
> The apr-util patch to the apr_hooks.h is simple and affords some  
> nice probability for future probe uses.
> Docs on these probes are available here:
> Applications#Apache2.2.x
> I'm not on this list -- Cc me on pertinent responses please.

Works lovely on Solaris with the normal/real libtool - but not with  
Justin's. On MacOSX I think there is something wrong with the linker.  
Either MacOS does not need the extra -G or -h is enough on all  

What is the downside/penalty for making this a default ? Or should  
this always be an optional thing - set at ./configure time ?


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