Debugging (with GDB)

ARB functions useful for debugging

• GB_dump(GBDATA*)
  prints a dump of the database element. Crashes easily - see below on how to continue.

• GB_dump_db_path(GBDATA*)
  prints the hierarchical path from DB root to given element

gdb usage e.g.:

p GB_dump(variable)

Continuing after assertions

Since ARB heavily uses assertions the debugger will easily stop execution with a segmentation fault. Here are some commands making it possible to continue nevertheless:

• return [returnvalue]
  returns from the currently selected stackframe (with returnvalue if given). All stackframes below are discarded.

• jump [linespec]
  jump to linespec (e.g. behind the currently failed assertion)

• signal 0
  Works like continue, but discards a previously signaled signal (e.g. SIGSEGV)