[note] Debug core dump with GDB

Always write once a time C + +, some things are always used up forget ... Remember how to debug the core dump with GDB before you forget it.

You first need to set the size of the core file, which is 0 by default so no core file will be generated

$ ulimit-c Unlimited

and add it to the compiled flag.

-g-rdynamic

Get the dynamic static symbol table.

And then

 Make $ # do something to make it core dump

Assuming the executable file is called test, the resulting core file is called core (Ubuntu 12.04 Yes, other systems may call other names)

$ GDB Test core$. $ (GDB) BackTrace

Then you can see the stack to debug =. =