[Monetdb-developers] dlclose() segfault

Mark Bucciarelli mkbucc at gmail.com
Tue Mar 23 17:21:25 CET 2010


On Tue, Mar 23, 2010 at 11:34 AM, Lefteris <lsidir at gmail.com> wrote:
>
> It works on my machine. Can you run it with gdb and send us the trace?
>

I guess it's something about threads.

$ gcc -g bad.c && ./a.out
Segmentation fault (core dumped)
$ gdb a.out a.out.core
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This GDB was configured as "i386-unknown-openbsd4.6"...
Core was generated by `a.out'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib/libc.so.51.0...done.
Loaded symbols for /usr/lib/libc.so.51.0
Reading symbols from /usr/libexec/ld.so...done.
Loaded symbols for /usr/libexec/ld.so
#0  0x0f77ff14 in ?? ()
(gdb) where
#0  0x0f77ff14 in ?? ()
#1  0x0adce36b in _dl_thread_kern_go () from /usr/libexec/ld.so
#2  0x0adcde4b in dlclose () from /usr/libexec/ld.so
#3  0x1c0007c5 in main () at bad.c:10
(gdb) quit
$ head -10 bad.c | tail -1
        dlclose(handle);
$ grep -A 4 ^_dl_thread_kern_go /usr/src/libexec/ld.so/dlfcn.c
_dl_thread_kern_go(void)
{
        if (_dl_thread_fnc != NULL)
                (*_dl_thread_fnc)(1);
}
$




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