Re: [Tuxpaint-devel] Kaleidoscope crash

[Albert C. <aca...@gm...>]

If using gdb, then use Electric Fence at the same time.
Without that, the crash is likely to be in unrelated code.
The bad code overflows a buffer, but this doesn't cause
an immediate crash. Later, good code calls malloc()
and gets a crash because malloc() walks a corrupt list.
Electric Fence puts unmapped memory after each allocation,
causing crashes to be immediate and making gdb useful.

You can:

a. link with -lefence
b. set LD_PRELOAD to the name of the libefence *.so
c. use the "ef" program, which sets LD_PRELOAD for you

See "man efence" for extra info; setting the alignment
to 0 would be a good idea.

There are many things this won't spot though. Valgrind
is probably the better tool.