Analyzing core file of shared object

Question

Tests :

[1] creating divide of 0 in executable hat was compiled with optimization (O2) and debugging symbols , thus a core was generated.

[2] creating divide of 0 in shared object hat was compiled with optimization (O2) and debugging symbols , thus a core was generated.

Results:

[First] analysing the core generated by [1] was succeeded and an exact location of the crush could be seen in GDB/Totalview.

[Second] analysing the core generated by [2] was NOT succeeded and a hex numeric location was the output of the crush.

can someone tell how can i get [2] to succeed ?

Answer 1

Check with ldd that your shared object can be found.

If not, try with shell variable LD_LIBRARY_PATH to set its path and try again gdb <executable> core.

Another option is to edit config /etc/ld.so.conf and run ldconfig.

Answer 2

Solved it , i was opening the core file like this :

1. gdb core core-file-name
2. file location-of-binary

then the binary symbols was loaded, BUT Not any shared objects !!!!!

going this way :

1. gdb -c core-file-name location-of-binary

this caused binary symbols to be loaded BUT ALSO shared objects symbols to be loaded as well !!!

thanks for the help.