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PODoes anybody know if someone had integrated libsegfault.so and gdbserver in order to get gdb attached on the fly to a crashed program?
 

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  1. PODoes anybody know if someone had integrated libsegfault.so and gdbserver in order to get gdb attached on the fly to a crashed program?
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    <p>It's mentioned in <a href="http://sourceware.org/ml/gdb/2007-06/msg00360.html" rel="nofollow noreferrer">http://sourceware.org/ml/gdb/2007-06/msg00360.html</a> before.<br> But no one seemed to have actually implemented this kind of idea.<br> Is there any obstacles for realizing this? </p> <p>My requirements are the following: </p> <ol> <li>Being able to plugin to any elf binary executable (ex. by using LD_PRELOAD)</li> <li>The binary may be a multithreaded executable</li> <li>The binary may link to a library that contain main function</li> <li>This should work in various cpu architecture other than x86 (MIPS, ARM, PPC at least)</li> </ol> <p>So if there's already a solution like this, I wanted a link, but if there isn't yet, I wanted to know why it's not already implemented as a wheel.<br> It might be just that no one didn't needed it... but I think this is quite useful to prepare as a standard.</p> <p>Any technical or political issue other than just putting it together code is wanted.</p>
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    1. COIf you already have a segfault core file, you can attach the gdb or gdbserver to the core file and get the debug info. If you don't but you know how to reproduce the crash, you can attach the pid and watch it segfault. How/what is this going to help debugging?
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    2. COI suppose the idea is that you don't have the overhead of having gdb[server] attached until the program actually crashes, and that looking at a live image can be more enlightening than just a core dump. (I don't agree, but I can understand the sentiment.) More problematically, the **question** asks "is this possible?" but OP seems to **expect** a full solution...
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      1. PODoes anybody know if someone had integrated libsegfault.so and gdbserver in order to get gdb attached on the fly to a crashed program?
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