Re: [HACKERS] Blowing core - anyone have any ideas?

>
>
> Ok, I'm trying to finish cleaning up libpq++ and with v6.4.0 and with
> the snapshot I grabbed a few minutes ago I get the same thing.
>
> The library builds and installs fine.
> The examples build fine.
> The examples run fine UNTIL they end. After the program ends and the
> destructor finishes I get a core dump from a seg fault. Running it in
> the debugger (the library and the example are both compiled with -g) I
> get this for a backtrace:
>
> (gdb) bt
> #0 0x1000000 in ?? ()
> #1 0x38000000 in ?? ()
> Error accessing memory address 0x7ec1e: Invalid argument.
> (gdb)
>
> Any ideas where to look? This is on FreeBSD 2.2.6 (can't upgrade it
> just yet - it's too busy).

Unfortunately I can't compile the examples. I'm not very
familiar with C++ and the cryptic error messages I get about
"undefined" references surely result from some wrong shared
lib setups here.

Anyway - the above tells that something corrupted the stack
and that the core is mostly useless (except for including it
into replies to spam mail).

The destructor eventually calls PQuntrace(), PQclear() and
PQfinish(). Try setting breakpoints on them and then single
step until shit happens.

Jan

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