3.3.6. Using GDB to intercept handling of signals by applications

Procedure

1. Set the catchpoint:

   (gdb) catch signal signal-type

   The command catch signal sets a special type of a breakpoint that halts execution when a signal is received by the program. The signal-type option specifies the type of the signal. Use the special value 'all' to catch all signals.

2. Let the program run.

   • If the program has not started execution, start it:

     (gdb) r

   • If the program execution is halted, resume it:

     (gdb) c

3. GDB halts execution after the program receives any specified signal.
4. Continue by debugging the program code handling the signal, or resume execution with the knowledge of the signal being received.

5. Later, to exit the GDB debugging session:

   (gdb) q