On 01/28/2010 01:22 AM, [email protected] wrote:
Nikos Chantziaras<[email protected]> [10-01-27 17:09]:
I need to get a backtrace from a core dump file. I followed the
instructions here:
http://www.gentoo.org/proj/en/qa/backtraces.xml
I added -g to CFLAGS and splitdebug to FEATURES and built the
application with those new setting (that would be media-sound/lmms in
this case.) I then did "ulimit -c unlimited" and started the
application from that shell. I reproduced the crash and a core file
was successfully produced. But, when trying to get a backtrace, I get:
--------
gdb --core core --batch --quiet -ex "thread apply all bt full" -ex
"quit"
[New Thread 3575]
[New Thread 3573]
[New Thread 3577]
Core was generated by `./lmms'.
Program terminated with signal 11, Segmentation fault.
#0 0x0000003007b79985 in ?? ()
Thread 4 (Thread 3577):
#0 0x0000003000c0e07d in ?? ()
No symbol table info available.
Thread 3 (Thread 3573):
#0 0x0000003000c0b1fc in ?? ()
No symbol table info available.
Thread 2 (Thread 3575):
#0 0x000000306d44feac in ?? ()
No symbol table info available.
Thread 1 (Thread 3571):
#0 0x0000003007b79985 in ?? ()
No symbol table info available.
--------
Then I re-emerged the application, canceled the emerge and did a manual
"make" in /var/tmp/portage so I get the unstripped lmms executable.
However, same thing as above happens. What am I missing?
Hi,
you need to build all librarys, which are linked to that application
as with debug option, too.
I'm only interested at where in the application the crash happens so I
don't need details about the libs in the backtrace.
