Re: Line number at segfault

Jens.Toerring_at_physik.fu-berlin.de
Date: 05/19/04 

Date: 19 May 2004 15:40:35 GMT

Francis <fDONTSPAMgudin@nerreallydontim.net> wrote:
> Le 19-05-2004, Russell Shaw <rjshawN_o@s_pam.netspace.net.au> a écrit :
>> I'm using gcc 3.3.3 on debian.
>>
>> Is there any way to make the segfault of a C program
>> print out the file and line number it happened at?

If you can't load the core file into your debugger you can install
a signal handler for SIGSEGV and then use the backtrace() and
backtrace_symbols_fd( ) functions (see the info pages for libc)
to stderr (i.e. file descriptor 2). But of course you need to have
to program compiled with the '-g' option, otherwise all you can
get is a list of addresses, but no line numbers. And also note
that optimization can mess up the results.

                                  Regards, Jens 

-- 
  \   Jens Thoms Toerring  ___  Jens.Toerring@physik.fu-berlin.de
   \__________________________  http://www.toerring.de

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