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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 27751] - Segmentation Fault in shmcb_cyclic_cton_memcpy
Date Fri, 19 Mar 2004 18:55:56 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=27751

Segmentation Fault in shmcb_cyclic_cton_memcpy





------- Additional Comments From geoff@geoffthorpe.net  2004-03-19 18:55 -------
It seems to me that src_offset and src_len are getting corrupted somehow, but it's not 
obvious to me where or how this is happening. The versions you're using of redhat, 
glibc, gcc (etc) are a little dated. and though I'm reluctant to dismiss the issue as 
being old tools, it would certainly be something to consider - if you're able to build 
using a different gcc or mess with the optimisation levels, that might hint as to whether

this is compiler sensitive or something more macabre. 
 
Also, is it possible to insert some debugging lines in the last two frames around the 
problem area to dump the exact values being passed around? I'm curious how and 
where those values are getting mangled. As/when you hit a segfault, it would be useful 
to have something to help pinpoint where the corruption was introduced. (Another 
possible hint: could those "corrupt" values actually be some unsigned representation 
of a negative - indicating a possible bug in the "cyclic" logic?) I've added myself to the

CC line for this ticket, please let me know how you get on with this.

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