How to debug a segfault.
simonmarhaskell at gmail.com
Wed Feb 28 05:43:47 EST 2007
David Brown wrote:
> I'm developing a program with GHC-6.6. I've been on amd64, and
> haven't had problems, but now when I run the program on on x86 (after
> cleaning and recompiling), I'm getting a segfault.
> gdb isn't very helpful at all:
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread -1212873040 (LWP 26946)]
> 0x080b45b8 in s2EI_info ()
> (gdb) bt
> #0 0x080b45b8 in s2EI_info ()
> #1 0x081757a8 in ?? ()
> #2 0x00000004 in ?? ()
> #3 0xb7875278 in ?? ()
> I am using some various bindings to some C libraries, some I have
> written and some written by others. But, I'm not able to figure out
> where to even begin looking for the problem.
> Any advice on how I might be able to better debug this? Would
> compiling unregistered help (I'll have to figure out how to build
> libraries for that)?
Fortunately I wrote a wiki page on just this subject, mainly so that I can say
RTFM :-) After reading the FM, if you're still having difficulties then post a
followup and we'll try to help if we can.
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